1 /*
2 * Copyright (c) 1997, 2016, 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 "evtrace/traceEvents.hpp"
54 #include "utilities/preserveException.hpp"
55
56 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
57
58 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
59 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
60
61 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
62 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
63
64 InjectedField JavaClasses::_injected_fields[] = {
65 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
66 };
67
68 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
69 return _injected_fields[id].compute_offset();
70 }
71
72
73 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
74 *field_count = 0;
75
76 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
77 if (sid == vmSymbols::NO_SID) {
78 // Only well known classes can inject fields
79 return NULL;
80 }
81
82 int count = 0;
83 int start = -1;
84
85 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
86 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
87 count++; \
88 if (start == -1) start = klass##_##name##_enum; \
89 }
90 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
91 #undef LOOKUP_INJECTED_FIELD
92
93 if (start != -1) {
94 *field_count = count;
95 return _injected_fields + start;
96 }
97 return NULL;
98 }
99
100
101 static bool find_field(InstanceKlass* ik,
102 Symbol* name_symbol, Symbol* signature_symbol,
103 fieldDescriptor* fd,
104 bool allow_super = false) {
105 if (allow_super)
106 return ik->find_field(name_symbol, signature_symbol, fd) != NULL;
107 else
108 return ik->find_local_field(name_symbol, signature_symbol, fd);
109 }
110
111 // Helpful routine for computing field offsets at run time rather than hardcoding them
112 static void
113 compute_offset(int &dest_offset,
114 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
115 bool allow_super = false) {
116 fieldDescriptor fd;
117 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
118 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
119 ResourceMark rm;
120 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
121 #ifndef PRODUCT
122 klass_oop->print();
123 tty->print_cr("all fields:");
124 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
125 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
126 }
127 #endif //PRODUCT
128 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class");
129 }
130 dest_offset = fd.offset();
131 }
132
133 // Same as above but for "optional" offsets that might not be present in certain JDK versions
134 static void
135 compute_optional_offset(int& dest_offset,
136 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
137 bool allow_super = false) {
138 fieldDescriptor fd;
139 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
140 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
141 dest_offset = fd.offset();
142 }
143 }
144
145
146 int java_lang_String::value_offset = 0;
147 int java_lang_String::offset_offset = 0;
148 int java_lang_String::count_offset = 0;
149 int java_lang_String::hash_offset = 0;
150
151 bool java_lang_String::initialized = false;
152
153 void java_lang_String::compute_offsets() {
154 assert(!initialized, "offsets should be initialized only once");
155
156 Klass* k = SystemDictionary::String_klass();
157 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature());
158 compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature());
159 compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature());
160 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature());
161
162 initialized = true;
163 }
164
165 Handle java_lang_String::basic_create(int length, TRAPS) {
166 assert(initialized, "Must be initialized");
167 // Create the String object first, so there's a chance that the String
168 // and the char array it points to end up in the same cache line.
169 oop obj;
170 obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH);
171
172 // Create the char array. The String object must be handlized here
173 // because GC can happen as a result of the allocation attempt.
174 Handle h_obj(THREAD, obj);
175 typeArrayOop buffer;
176 buffer = oopFactory::new_charArray(length, CHECK_NH);
177
178 // Point the String at the char array
179 obj = h_obj();
180 set_value(obj, buffer);
181 // No need to zero the offset, allocation zero'ed the entire String object
182 assert(offset(obj) == 0, "initial String offset should be zero");
183 //set_offset(obj, 0);
184 set_count(obj, length);
185
186 return h_obj;
187 }
188
189 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
190 Handle h_obj = basic_create(length, CHECK_NH);
191 typeArrayOop buffer = value(h_obj());
192 for (int index = 0; index < length; index++) {
193 buffer->char_at_put(index, unicode[index]);
194 }
195 return h_obj;
196 }
197
198 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
199 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
200 return h_obj();
201 }
202
203 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
204 if (utf8_str == NULL) {
205 return Handle();
206 }
207 int length = UTF8::unicode_length(utf8_str);
208 Handle h_obj = basic_create(length, CHECK_NH);
209 if (length > 0) {
210 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
211 }
212 return h_obj;
213 }
214
215 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
216 Handle h_obj = create_from_str(utf8_str, CHECK_0);
217 return h_obj();
218 }
219
220 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
221 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
222 Handle h_obj = basic_create(length, CHECK_NH);
223 if (length > 0) {
224 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
225 }
226 return h_obj;
227 }
228
229 // Converts a C string to a Java String based on current encoding
230 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
231 assert(str != NULL, "bad arguments");
232
233 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
234 static to_java_string_fn_t _to_java_string_fn = NULL;
235
236 if (_to_java_string_fn == NULL) {
237 void *lib_handle = os::native_java_library();
238 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
239 if (_to_java_string_fn == NULL) {
240 fatal("NewStringPlatform missing");
241 }
242 }
243
244 jstring js = NULL;
245 { JavaThread* thread = (JavaThread*)THREAD;
246 assert(thread->is_Java_thread(), "must be java thread");
247 HandleMark hm(thread);
248 ThreadToNativeFromVM ttn(thread);
249 js = (_to_java_string_fn)(thread->jni_environment(), str);
250 }
251 return Handle(THREAD, JNIHandles::resolve(js));
252 }
253
254 // Converts a Java String to a native C string that can be used for
255 // native OS calls.
256 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
257
258 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
259 static to_platform_string_fn_t _to_platform_string_fn = NULL;
260
261 if (_to_platform_string_fn == NULL) {
262 void *lib_handle = os::native_java_library();
263 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
264 if (_to_platform_string_fn == NULL) {
265 fatal("GetStringPlatformChars missing");
266 }
267 }
268
269 char *native_platform_string;
270 { JavaThread* thread = (JavaThread*)THREAD;
271 assert(thread->is_Java_thread(), "must be java thread");
272 JNIEnv *env = thread->jni_environment();
273 jstring js = (jstring) JNIHandles::make_local(env, java_string());
274 bool is_copy;
275 HandleMark hm(thread);
276 ThreadToNativeFromVM ttn(thread);
277 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
278 assert(is_copy == JNI_TRUE, "is_copy value changed");
279 JNIHandles::destroy_local(js);
280 }
281 return native_platform_string;
282 }
283
284 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
285 oop obj = java_string();
286 // Typical usage is to convert all '/' to '.' in string.
287 typeArrayOop value = java_lang_String::value(obj);
288 int offset = java_lang_String::offset(obj);
289 int length = java_lang_String::length(obj);
290
291 // First check if any from_char exist
292 int index; // Declared outside, used later
293 for (index = 0; index < length; index++) {
294 if (value->char_at(index + offset) == from_char) {
295 break;
296 }
297 }
298 if (index == length) {
299 // No from_char, so do not copy.
300 return java_string;
301 }
302
303 // Create new UNICODE buffer. Must handlize value because GC
304 // may happen during String and char array creation.
305 typeArrayHandle h_value(THREAD, value);
306 Handle string = basic_create(length, CHECK_NH);
307
308 typeArrayOop from_buffer = h_value();
309 typeArrayOop to_buffer = java_lang_String::value(string());
310
311 // Copy contents
312 for (index = 0; index < length; index++) {
313 jchar c = from_buffer->char_at(index + offset);
314 if (c == from_char) {
315 c = to_char;
316 }
317 to_buffer->char_at_put(index, c);
318 }
319 return string;
320 }
321
322 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
323 typeArrayOop value = java_lang_String::value(java_string);
324 int offset = java_lang_String::offset(java_string);
325 length = java_lang_String::length(java_string);
326
327 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
328 if (result != NULL) {
329 for (int index = 0; index < length; index++) {
330 result[index] = value->char_at(index + offset);
331 }
332 } else {
333 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
334 }
335 return result;
336 }
337
338 unsigned int java_lang_String::hash_code(oop java_string) {
339 int length = java_lang_String::length(java_string);
340 // Zero length string will hash to zero with String.hashCode() function.
341 if (length == 0) return 0;
342
343 typeArrayOop value = java_lang_String::value(java_string);
344 int offset = java_lang_String::offset(java_string);
345 return java_lang_String::hash_code(value->char_at_addr(offset), length);
346 }
347
348 char* java_lang_String::as_quoted_ascii(oop java_string) {
349 typeArrayOop value = java_lang_String::value(java_string);
350 int offset = java_lang_String::offset(java_string);
351 int length = java_lang_String::length(java_string);
352
353 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
354 if (base == NULL) return NULL;
355
356 int result_length = UNICODE::quoted_ascii_length(base, length) + 1;
357 char* result = NEW_RESOURCE_ARRAY(char, result_length);
358 UNICODE::as_quoted_ascii(base, length, result, result_length);
359 assert(result_length >= length + 1, "must not be shorter");
360 assert(result_length == (int)strlen(result) + 1, "must match");
361 return result;
362 }
363
364 unsigned int java_lang_String::hash_string(oop java_string) {
365 int length = java_lang_String::length(java_string);
366 // Zero length string doesn't hash necessarily hash to zero.
367 if (length == 0) {
368 return StringTable::hash_string(NULL, 0);
369 }
370
371 typeArrayOop value = java_lang_String::value(java_string);
372 int offset = java_lang_String::offset(java_string);
373 return StringTable::hash_string(value->char_at_addr(offset), length);
374 }
375
376 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {
377 oop obj = java_string();
378 typeArrayOop value = java_lang_String::value(obj);
379 int offset = java_lang_String::offset(obj);
380 int length = java_lang_String::length(obj);
381 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
382 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
383 return sym;
384 }
385
386 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
387 typeArrayOop value = java_lang_String::value(java_string);
388 int offset = java_lang_String::offset(java_string);
389 int length = java_lang_String::length(java_string);
390 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
391 return SymbolTable::probe_unicode(base, length);
392 }
393
394
395 int java_lang_String::utf8_length(oop java_string) {
396 typeArrayOop value = java_lang_String::value(java_string);
397 int offset = java_lang_String::offset(java_string);
398 int length = java_lang_String::length(java_string);
399 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
400 return UNICODE::utf8_length(position, length);
401 }
402
403 char* java_lang_String::as_utf8_string(oop java_string) {
404 typeArrayOop value = java_lang_String::value(java_string);
405 int offset = java_lang_String::offset(java_string);
406 int length = java_lang_String::length(java_string);
407 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
408 return UNICODE::as_utf8(position, length);
409 }
410
411 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
412 typeArrayOop value = java_lang_String::value(java_string);
413 int offset = java_lang_String::offset(java_string);
414 int length = java_lang_String::length(java_string);
415 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
416 return UNICODE::as_utf8(position, length, buf, buflen);
417 }
418
419 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
420 typeArrayOop value = java_lang_String::value(java_string);
421 int offset = java_lang_String::offset(java_string);
422 int length = java_lang_String::length(java_string);
423 assert(start + len <= length, "just checking");
424 jchar* position = value->char_at_addr(offset + start);
425 return UNICODE::as_utf8(position, len);
426 }
427
428 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
429 assert(java_string->klass() == SystemDictionary::String_klass(),
430 "must be java_string");
431 typeArrayOop value = java_lang_String::value(java_string);
432 int offset = java_lang_String::offset(java_string);
433 int length = java_lang_String::length(java_string);
434 if (length != len) {
435 return false;
436 }
437 for (int i = 0; i < len; i++) {
438 if (value->char_at(i + offset) != chars[i]) {
439 return false;
440 }
441 }
442 return true;
443 }
444
445 bool java_lang_String::equals(oop str1, oop str2) {
446 assert(str1->klass() == SystemDictionary::String_klass(),
447 "must be java String");
448 assert(str2->klass() == SystemDictionary::String_klass(),
449 "must be java String");
450 typeArrayOop value1 = java_lang_String::value(str1);
451 int offset1 = java_lang_String::offset(str1);
452 int length1 = java_lang_String::length(str1);
453 typeArrayOop value2 = java_lang_String::value(str2);
454 int offset2 = java_lang_String::offset(str2);
455 int length2 = java_lang_String::length(str2);
456
457 if (length1 != length2) {
458 return false;
459 }
460 for (int i = 0; i < length1; i++) {
461 if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) {
462 return false;
463 }
464 }
465 return true;
466 }
467
468 void java_lang_String::print(oop java_string, outputStream* st) {
469 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
470 typeArrayOop value = java_lang_String::value(java_string);
471 int offset = java_lang_String::offset(java_string);
472 int length = java_lang_String::length(java_string);
473
474 int end = MIN2(length, 100);
475 if (value == NULL) {
476 // This can happen if, e.g., printing a String
477 // object before its initializer has been called
478 st->print_cr("NULL");
479 } else {
480 st->print("\"");
481 for (int index = 0; index < length; index++) {
482 st->print("%c", value->char_at(index + offset));
483 }
484 st->print("\"");
485 }
486 }
487
488
489 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
490 assert(mirror.not_null() && fd->is_static(), "just checking");
491 if (fd->has_initial_value()) {
492 BasicType t = fd->field_type();
493 switch (t) {
494 case T_BYTE:
495 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
496 break;
497 case T_BOOLEAN:
498 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
499 break;
500 case T_CHAR:
501 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
502 break;
503 case T_SHORT:
504 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
505 break;
506 case T_INT:
507 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
508 break;
509 case T_FLOAT:
510 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
511 break;
512 case T_DOUBLE:
513 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
514 break;
515 case T_LONG:
516 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
517 break;
518 case T_OBJECT:
519 {
520 #ifdef ASSERT
521 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
522 assert(fd->signature() == sym, "just checking");
523 #endif
524 oop string = fd->string_initial_value(CHECK);
525 mirror()->obj_field_put(fd->offset(), string);
526 }
527 break;
528 default:
529 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
530 "Illegal ConstantValue attribute in class file");
531 }
532 }
533 }
534
535
536 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) {
537 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
538
539 // If the offset was read from the shared archive, it was fixed up already
540 if (!k->is_shared()) {
541 if (k->oop_is_instance()) {
542 // During bootstrap, java.lang.Class wasn't loaded so static field
543 // offsets were computed without the size added it. Go back and
544 // update all the static field offsets to included the size.
545 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) {
546 if (fs.access_flags().is_static()) {
547 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
548 fs.set_offset(real_offset);
549 }
550 }
551 }
552 }
553 create_mirror(k, Handle(NULL), Handle(NULL), CHECK);
554 }
555
556 void java_lang_Class::initialize_mirror_fields(KlassHandle k,
557 Handle mirror,
558 Handle protection_domain,
559 TRAPS) {
560 // Allocate a simple java object for a lock.
561 // This needs to be a java object because during class initialization
562 // it can be held across a java call.
563 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
564 set_init_lock(mirror(), r);
565
566 // Set protection domain also
567 set_protection_domain(mirror(), protection_domain());
568
569 // Initialize static fields
570 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK);
571 }
572
573 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader,
574 Handle protection_domain, TRAPS) {
575 assert(k->java_mirror() == NULL, "should only assign mirror once");
576 // Use this moment of initialization to cache modifier_flags also,
577 // to support Class.getModifiers(). Instance classes recalculate
578 // the cached flags after the class file is parsed, but before the
579 // class is put into the system dictionary.
580 int computed_modifiers = k->compute_modifier_flags(CHECK);
581 k->set_modifier_flags(computed_modifiers);
582 // Class_klass has to be loaded because it is used to allocate
583 // the mirror.
584 if (SystemDictionary::Class_klass_loaded()) {
585 // Allocate mirror (java.lang.Class instance)
586 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
587
588 // Setup indirection from mirror->klass
589 if (!k.is_null()) {
590 java_lang_Class::set_klass(mirror(), k());
591 }
592
593 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
594 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
595
596 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
597
598 // It might also have a component mirror. This mirror must already exist.
599 if (k->oop_is_array()) {
600 Handle comp_mirror;
601 if (k->oop_is_typeArray()) {
602 BasicType type = TypeArrayKlass::cast(k())->element_type();
603 comp_mirror = Universe::java_mirror(type);
604 } else {
605 assert(k->oop_is_objArray(), "Must be");
606 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass();
607 assert(element_klass != NULL, "Must have an element klass");
608 comp_mirror = element_klass->java_mirror();
609 }
610 assert(comp_mirror.not_null(), "must have a mirror");
611
612 // Two-way link between the array klass and its component mirror:
613 ArrayKlass::cast(k())->set_component_mirror(comp_mirror());
614 set_array_klass(comp_mirror(), k());
615 } else {
616 assert(k->oop_is_instance(), "Must be");
617
618 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
619 if (HAS_PENDING_EXCEPTION) {
620 // If any of the fields throws an exception like OOM remove the klass field
621 // from the mirror so GC doesn't follow it after the klass has been deallocated.
622 // This mirror looks like a primitive type, which logically it is because it
623 // it represents no class.
624 java_lang_Class::set_klass(mirror(), NULL);
625 return;
626 }
627 }
628
629 // set the classLoader field in the java_lang_Class instance
630 assert(class_loader() == k->class_loader(), "should be same");
631 set_class_loader(mirror(), class_loader());
632
633 // Setup indirection from klass->mirror last
634 // after any exceptions can happen during allocations.
635 if (!k.is_null()) {
636 k->set_java_mirror(mirror());
637 }
638 } else {
639 if (fixup_mirror_list() == NULL) {
640 GrowableArray<Klass*>* list =
641 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
642 set_fixup_mirror_list(list);
643 }
644 fixup_mirror_list()->push(k());
645 }
646 }
647
648
649 int java_lang_Class::oop_size(oop java_class) {
650 assert(_oop_size_offset != 0, "must be set");
651 return java_class->int_field(_oop_size_offset);
652 }
653 void java_lang_Class::set_oop_size(oop java_class, int size) {
654 assert(_oop_size_offset != 0, "must be set");
655 java_class->int_field_put(_oop_size_offset, size);
656 }
657 int java_lang_Class::static_oop_field_count(oop java_class) {
658 assert(_static_oop_field_count_offset != 0, "must be set");
659 return java_class->int_field(_static_oop_field_count_offset);
660 }
661 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
662 assert(_static_oop_field_count_offset != 0, "must be set");
663 java_class->int_field_put(_static_oop_field_count_offset, size);
664 }
665
666 oop java_lang_Class::protection_domain(oop java_class) {
667 assert(_protection_domain_offset != 0, "must be set");
668 return java_class->obj_field(_protection_domain_offset);
669 }
670 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
671 assert(_protection_domain_offset != 0, "must be set");
672 java_class->obj_field_put(_protection_domain_offset, pd);
673 }
674
675 oop java_lang_Class::init_lock(oop java_class) {
676 assert(_init_lock_offset != 0, "must be set");
677 return java_class->obj_field(_init_lock_offset);
678 }
679 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
680 assert(_init_lock_offset != 0, "must be set");
681 java_class->obj_field_put(_init_lock_offset, init_lock);
682 }
683
684 objArrayOop java_lang_Class::signers(oop java_class) {
685 assert(_signers_offset != 0, "must be set");
686 return (objArrayOop)java_class->obj_field(_signers_offset);
687 }
688 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
689 assert(_signers_offset != 0, "must be set");
690 java_class->obj_field_put(_signers_offset, (oop)signers);
691 }
692
693
694 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
695 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
696 if (_class_loader_offset != 0) {
697 java_class->obj_field_put(_class_loader_offset, loader);
698 }
699 }
700
701 oop java_lang_Class::class_loader(oop java_class) {
702 assert(_class_loader_offset != 0, "must be set");
703 return java_class->obj_field(_class_loader_offset);
704 }
705
706 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
707 // This should be improved by adding a field at the Java level or by
708 // introducing a new VM klass (see comment in ClassFileParser)
709 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
710 if (type != T_VOID) {
711 Klass* aklass = Universe::typeArrayKlassObj(type);
712 assert(aklass != NULL, "correct bootstrap");
713 set_array_klass(java_class, aklass);
714 }
715 #ifdef ASSERT
716 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
717 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
718 #endif
719 return java_class;
720 }
721
722
723 Klass* java_lang_Class::as_Klass(oop java_class) {
724 //%note memory_2
725 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
726 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
727 assert(k == NULL || k->is_klass(), "type check");
728 return k;
729 }
730
731
732 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
733 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
734 java_class->metadata_field_put(_klass_offset, klass);
735 }
736
737
738 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
739 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
740 Symbol* name = NULL;
741 bool is_instance = false;
742 if (is_primitive(java_class)) {
743 name = vmSymbols::type_signature(primitive_type(java_class));
744 } else {
745 Klass* k = as_Klass(java_class);
746 is_instance = k->oop_is_instance();
747 name = k->name();
748 }
749 if (name == NULL) {
750 st->print("<null>");
751 return;
752 }
753 if (is_instance) st->print("L");
754 st->write((char*) name->base(), (int) name->utf8_length());
755 if (is_instance) st->print(";");
756 }
757
758 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
759 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
760 Symbol* name;
761 if (is_primitive(java_class)) {
762 name = vmSymbols::type_signature(primitive_type(java_class));
763 // Because this can create a new symbol, the caller has to decrement
764 // the refcount, so make adjustment here and below for symbols returned
765 // that are not created or incremented due to a successful lookup.
766 name->increment_refcount();
767 } else {
768 Klass* k = as_Klass(java_class);
769 if (!k->oop_is_instance()) {
770 name = k->name();
771 name->increment_refcount();
772 } else {
773 ResourceMark rm;
774 const char* sigstr = k->signature_name();
775 int siglen = (int) strlen(sigstr);
776 if (!intern_if_not_found) {
777 name = SymbolTable::probe(sigstr, siglen);
778 } else {
779 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
780 }
781 }
782 }
783 return name;
784 }
785
786 // Returns the Java name for this Java mirror (Resource allocated)
787 // See Klass::external_name().
788 // For primitive type Java mirrors, its type name is returned.
789 const char* java_lang_Class::as_external_name(oop java_class) {
790 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
791 const char* name = NULL;
792 if (is_primitive(java_class)) {
793 name = type2name(primitive_type(java_class));
794 } else {
795 name = as_Klass(java_class)->external_name();
796 }
797 if (name == NULL) {
798 name = "<null>";
799 }
800 return name;
801 }
802
803 Klass* java_lang_Class::array_klass(oop java_class) {
804 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
805 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass");
806 return k;
807 }
808
809
810 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
811 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass");
812 java_class->metadata_field_put(_array_klass_offset, klass);
813 }
814
815
816 bool java_lang_Class::is_primitive(oop java_class) {
817 // should assert:
818 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
819 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
820
821 #ifdef ASSERT
822 if (is_primitive) {
823 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
824 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
825 "Should be either the T_VOID primitive or a java primitive");
826 }
827 #endif
828
829 return is_primitive;
830 }
831
832
833 BasicType java_lang_Class::primitive_type(oop java_class) {
834 assert(java_lang_Class::is_primitive(java_class), "just checking");
835 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
836 BasicType type = T_VOID;
837 if (ak != NULL) {
838 // Note: create_basic_type_mirror above initializes ak to a non-null value.
839 type = ArrayKlass::cast(ak)->element_type();
840 } else {
841 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
842 }
843 assert(Universe::java_mirror(type) == java_class, "must be consistent");
844 return type;
845 }
846
847 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
848 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
849 if (is_primitive(java_class)) {
850 if (reference_klass != NULL)
851 (*reference_klass) = NULL;
852 return primitive_type(java_class);
853 } else {
854 if (reference_klass != NULL)
855 (*reference_klass) = as_Klass(java_class);
856 return T_OBJECT;
857 }
858 }
859
860
861 oop java_lang_Class::primitive_mirror(BasicType t) {
862 oop mirror = Universe::java_mirror(t);
863 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
864 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
865 return mirror;
866 }
867
868 bool java_lang_Class::offsets_computed = false;
869 int java_lang_Class::classRedefinedCount_offset = -1;
870
871 void java_lang_Class::compute_offsets() {
872 assert(!offsets_computed, "offsets should be initialized only once");
873 offsets_computed = true;
874
875 Klass* klass_oop = SystemDictionary::Class_klass();
876 // The classRedefinedCount field is only present starting in 1.5,
877 // so don't go fatal.
878 compute_optional_offset(classRedefinedCount_offset,
879 klass_oop, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
880
881 // Needs to be optional because the old build runs Queens during bootstrapping
882 // and jdk8-9 doesn't have coordinated pushes yet.
883 compute_optional_offset(_class_loader_offset,
884 klass_oop, vmSymbols::classLoader_name(),
885 vmSymbols::classloader_signature());
886
887 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
888 }
889
890 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
891 if (!JDK_Version::is_gte_jdk15x_version()
892 || classRedefinedCount_offset == -1) {
893 // The classRedefinedCount field is only present starting in 1.5.
894 // If we don't have an offset for it then just return -1 as a marker.
895 return -1;
896 }
897
898 return the_class_mirror->int_field(classRedefinedCount_offset);
899 }
900
901 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
902 if (!JDK_Version::is_gte_jdk15x_version()
903 || classRedefinedCount_offset == -1) {
904 // The classRedefinedCount field is only present starting in 1.5.
905 // If we don't have an offset for it then nothing to set.
906 return;
907 }
908
909 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
910 }
911
912
913 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
914 // platform thread structure, and a eetop offset which was used for thread
915 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
916 // merged, so in the HotSpot VM we just use the eetop field for the thread
917 // instead of the privateInfo_offset.
918 //
919 // Note: The stackSize field is only present starting in 1.4.
920
921 int java_lang_Thread::_name_offset = 0;
922 int java_lang_Thread::_group_offset = 0;
923 int java_lang_Thread::_contextClassLoader_offset = 0;
924 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
925 int java_lang_Thread::_priority_offset = 0;
926 int java_lang_Thread::_eetop_offset = 0;
927 int java_lang_Thread::_daemon_offset = 0;
928 int java_lang_Thread::_stillborn_offset = 0;
929 int java_lang_Thread::_stackSize_offset = 0;
930 int java_lang_Thread::_tid_offset = 0;
931 int java_lang_Thread::_thread_status_offset = 0;
932 int java_lang_Thread::_park_blocker_offset = 0;
933 int java_lang_Thread::_park_event_offset = 0 ;
934
935
936 void java_lang_Thread::compute_offsets() {
937 assert(_group_offset == 0, "offsets should be initialized only once");
938
939 Klass* k = SystemDictionary::Thread_klass();
940 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
941 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
942 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
943 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
944 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
945 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
946 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
947 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
948 // The stackSize field is only present starting in 1.4, so don't go fatal.
949 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
950 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
951 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
952 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
953 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
954 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
955 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
956 vmSymbols::long_signature());
957
958 int park_last_global_seq_offset_offset = 0;
959 compute_offset(park_last_global_seq_offset_offset, k, vmSymbols::park_last_global_seq_offset_name(), vmSymbols::long_signature());
960 k->java_mirror()->long_field_put(park_last_global_seq_offset_offset, in_bytes(Thread::park_last_global_seq_offset()));
961 int park_priority_offset_offset = 0;
962 compute_offset(park_priority_offset_offset, k, vmSymbols::park_priority_offset_name(), vmSymbols::long_signature());
963 k->java_mirror()->long_field_put(park_priority_offset_offset, in_bytes(Thread::park_priority_offset()));
964 int nesting_level_offset_offset = 0;
965 compute_offset(nesting_level_offset_offset, k, vmSymbols::nesting_level_offset_name(), vmSymbols::long_signature());
966 k->java_mirror()->long_field_put(nesting_level_offset_offset, in_bytes(Thread::nesting_level_offset()));
967 }
968
969
970 JavaThread* java_lang_Thread::thread(oop java_thread) {
971 return (JavaThread*)java_thread->address_field(_eetop_offset);
972 }
973
974
975 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
976 java_thread->address_field_put(_eetop_offset, (address)thread);
977 }
978
979
980 oop java_lang_Thread::name(oop java_thread) {
981 return java_thread->obj_field(_name_offset);
982 }
983
984
985 void java_lang_Thread::set_name(oop java_thread, oop name) {
986 java_thread->obj_field_put(_name_offset, name);
987 }
988
989
990 ThreadPriority java_lang_Thread::priority(oop java_thread) {
991 return (ThreadPriority)java_thread->int_field(_priority_offset);
992 }
993
994
995 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
996 java_thread->int_field_put(_priority_offset, priority);
997 }
998
999
1000 oop java_lang_Thread::threadGroup(oop java_thread) {
1001 return java_thread->obj_field(_group_offset);
1002 }
1003
1004
1005 bool java_lang_Thread::is_stillborn(oop java_thread) {
1006 return java_thread->bool_field(_stillborn_offset) != 0;
1007 }
1008
1009
1010 // We never have reason to turn the stillborn bit off
1011 void java_lang_Thread::set_stillborn(oop java_thread) {
1012 java_thread->bool_field_put(_stillborn_offset, true);
1013 }
1014
1015
1016 bool java_lang_Thread::is_alive(oop java_thread) {
1017 JavaThread* thr = java_lang_Thread::thread(java_thread);
1018 return (thr != NULL);
1019 }
1020
1021
1022 bool java_lang_Thread::is_daemon(oop java_thread) {
1023 return java_thread->bool_field(_daemon_offset) != 0;
1024 }
1025
1026
1027 void java_lang_Thread::set_daemon(oop java_thread) {
1028 java_thread->bool_field_put(_daemon_offset, true);
1029 }
1030
1031 oop java_lang_Thread::context_class_loader(oop java_thread) {
1032 return java_thread->obj_field(_contextClassLoader_offset);
1033 }
1034
1035 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1036 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1037 }
1038
1039
1040 jlong java_lang_Thread::stackSize(oop java_thread) {
1041 // The stackSize field is only present starting in 1.4
1042 if (_stackSize_offset > 0) {
1043 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check");
1044 return java_thread->long_field(_stackSize_offset);
1045 } else {
1046 return 0;
1047 }
1048 }
1049
1050 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1051 void java_lang_Thread::set_thread_status(oop java_thread,
1052 java_lang_Thread::ThreadStatus status) {
1053 // The threadStatus is only present starting in 1.5
1054 if (_thread_status_offset > 0) {
1055 java_thread->int_field_put(_thread_status_offset, status);
1056 }
1057 }
1058
1059 // Read thread status value from threadStatus field in java.lang.Thread java class.
1060 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1061 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() ||
1062 JavaThread::current()->thread_state() == _thread_in_vm,
1063 "Java Thread is not running in vm");
1064 // The threadStatus is only present starting in 1.5
1065 if (_thread_status_offset > 0) {
1066 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1067 } else {
1068 // All we can easily figure out is if it is alive, but that is
1069 // enough info for a valid unknown status.
1070 // These aren't restricted to valid set ThreadStatus values, so
1071 // use JVMTI values and cast.
1072 JavaThread* thr = java_lang_Thread::thread(java_thread);
1073 if (thr == NULL) {
1074 // the thread hasn't run yet or is in the process of exiting
1075 return NEW;
1076 }
1077 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1078 }
1079 }
1080
1081
1082 jlong java_lang_Thread::thread_id(oop java_thread) {
1083 // The thread ID field is only present starting in 1.5
1084 if (_tid_offset > 0) {
1085 return java_thread->long_field(_tid_offset);
1086 } else {
1087 return 0;
1088 }
1089 }
1090
1091 oop java_lang_Thread::park_blocker(oop java_thread) {
1092 assert(JDK_Version::current().supports_thread_park_blocker() &&
1093 _park_blocker_offset != 0, "Must support parkBlocker field");
1094
1095 if (_park_blocker_offset > 0) {
1096 return java_thread->obj_field(_park_blocker_offset);
1097 }
1098
1099 return NULL;
1100 }
1101
1102 jlong java_lang_Thread::park_event(oop java_thread) {
1103 if (_park_event_offset > 0) {
1104 return java_thread->long_field(_park_event_offset);
1105 }
1106 return 0;
1107 }
1108
1109 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1110 if (_park_event_offset > 0) {
1111 java_thread->long_field_put(_park_event_offset, ptr);
1112 return true;
1113 }
1114 return false;
1115 }
1116
1117
1118 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1119 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status");
1120 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1121 switch (status) {
1122 case NEW : return "NEW";
1123 case RUNNABLE : return "RUNNABLE";
1124 case SLEEPING : return "TIMED_WAITING (sleeping)";
1125 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1126 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1127 case PARKED : return "WAITING (parking)";
1128 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1129 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1130 case TERMINATED : return "TERMINATED";
1131 default : return "UNKNOWN";
1132 };
1133 }
1134 int java_lang_ThreadGroup::_parent_offset = 0;
1135 int java_lang_ThreadGroup::_name_offset = 0;
1136 int java_lang_ThreadGroup::_threads_offset = 0;
1137 int java_lang_ThreadGroup::_groups_offset = 0;
1138 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1139 int java_lang_ThreadGroup::_destroyed_offset = 0;
1140 int java_lang_ThreadGroup::_daemon_offset = 0;
1141 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
1142 int java_lang_ThreadGroup::_nthreads_offset = 0;
1143 int java_lang_ThreadGroup::_ngroups_offset = 0;
1144
1145 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1146 assert(java_thread_group->is_oop(), "thread group must be oop");
1147 return java_thread_group->obj_field(_parent_offset);
1148 }
1149
1150 // ("name as oop" accessor is not necessary)
1151
1152 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
1153 oop name = java_thread_group->obj_field(_name_offset);
1154 // ThreadGroup.name can be null
1155 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
1156 }
1157
1158 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1159 assert(java_thread_group->is_oop(), "thread group must be oop");
1160 return java_thread_group->int_field(_nthreads_offset);
1161 }
1162
1163 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1164 oop threads = java_thread_group->obj_field(_threads_offset);
1165 assert(threads != NULL, "threadgroups should have threads");
1166 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1167 return objArrayOop(threads);
1168 }
1169
1170 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1171 assert(java_thread_group->is_oop(), "thread group must be oop");
1172 return java_thread_group->int_field(_ngroups_offset);
1173 }
1174
1175 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1176 oop groups = java_thread_group->obj_field(_groups_offset);
1177 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1178 return objArrayOop(groups);
1179 }
1180
1181 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1182 assert(java_thread_group->is_oop(), "thread group must be oop");
1183 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1184 }
1185
1186 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1187 assert(java_thread_group->is_oop(), "thread group must be oop");
1188 return java_thread_group->bool_field(_destroyed_offset) != 0;
1189 }
1190
1191 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1192 assert(java_thread_group->is_oop(), "thread group must be oop");
1193 return java_thread_group->bool_field(_daemon_offset) != 0;
1194 }
1195
1196 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1197 assert(java_thread_group->is_oop(), "thread group must be oop");
1198 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1199 }
1200
1201 void java_lang_ThreadGroup::compute_offsets() {
1202 assert(_parent_offset == 0, "offsets should be initialized only once");
1203
1204 Klass* k = SystemDictionary::ThreadGroup_klass();
1205
1206 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1207 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1208 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1209 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1210 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1211 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1212 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1213 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1214 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1215 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1216 }
1217
1218 oop java_lang_Throwable::unassigned_stacktrace() {
1219 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass());
1220 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1221 if (UseCompressedOops) {
1222 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1223 } else {
1224 return oopDesc::load_decode_heap_oop((oop*)addr);
1225 }
1226 }
1227
1228 oop java_lang_Throwable::backtrace(oop throwable) {
1229 return throwable->obj_field_acquire(backtrace_offset);
1230 }
1231
1232
1233 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1234 throwable->release_obj_field_put(backtrace_offset, value);
1235 }
1236
1237
1238 oop java_lang_Throwable::message(oop throwable) {
1239 return throwable->obj_field(detailMessage_offset);
1240 }
1241
1242
1243 oop java_lang_Throwable::message(Handle throwable) {
1244 return throwable->obj_field(detailMessage_offset);
1245 }
1246
1247
1248 void java_lang_Throwable::set_message(oop throwable, oop value) {
1249 throwable->obj_field_put(detailMessage_offset, value);
1250 }
1251
1252
1253 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1254 throwable->obj_field_put(stackTrace_offset, st_element_array);
1255 }
1256
1257 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1258 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1259 set_stacktrace(throwable, NULL);
1260 }
1261
1262
1263 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1264 ResourceMark rm;
1265 Klass* k = throwable->klass();
1266 assert(k != NULL, "just checking");
1267 st->print("%s", InstanceKlass::cast(k)->external_name());
1268 oop msg = message(throwable);
1269 if (msg != NULL) {
1270 st->print(": %s", java_lang_String::as_utf8_string(msg));
1271 }
1272 }
1273
1274
1275 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1276 ResourceMark rm;
1277 Klass* k = throwable->klass();
1278 assert(k != NULL, "just checking");
1279 st->print("%s", InstanceKlass::cast(k)->external_name());
1280 oop msg = message(throwable);
1281 if (msg != NULL) {
1282 st->print(": %s", java_lang_String::as_utf8_string(msg));
1283 }
1284 }
1285
1286 // After this many redefines, the stack trace is unreliable.
1287 const int MAX_VERSION = USHRT_MAX;
1288
1289 // Helper backtrace functions to store bci|version together.
1290 static inline int merge_bci_and_version(int bci, int version) {
1291 // only store u2 for version, checking for overflow.
1292 if (version > USHRT_MAX || version < 0) version = MAX_VERSION;
1293 assert((jushort)bci == bci, "bci should be short");
1294 return build_int_from_shorts(version, bci);
1295 }
1296
1297 static inline int bci_at(unsigned int merged) {
1298 return extract_high_short_from_int(merged);
1299 }
1300 static inline int version_at(unsigned int merged) {
1301 return extract_low_short_from_int(merged);
1302 }
1303
1304 static inline bool version_matches(Method* method, int version) {
1305 assert(version < MAX_VERSION, "version is too big");
1306 return method != NULL && (method->constants()->version() == version);
1307 }
1308
1309 static inline int get_line_number(Method* method, int bci) {
1310 int line_number = 0;
1311 if (method->is_native()) {
1312 // Negative value different from -1 below, enabling Java code in
1313 // class java.lang.StackTraceElement to distinguish "native" from
1314 // "no LineNumberTable". JDK tests for -2.
1315 line_number = -2;
1316 } else {
1317 // Returns -1 if no LineNumberTable, and otherwise actual line number
1318 line_number = method->line_number_from_bci(bci);
1319 if (line_number == -1 && ShowHiddenFrames) {
1320 line_number = bci + 1000000;
1321 }
1322 }
1323 return line_number;
1324 }
1325
1326 // This class provides a simple wrapper over the internal structure of
1327 // exception backtrace to insulate users of the backtrace from needing
1328 // to know what it looks like.
1329 class BacktraceBuilder: public StackObj {
1330 private:
1331 Handle _backtrace;
1332 objArrayOop _head;
1333 typeArrayOop _methods;
1334 typeArrayOop _bcis;
1335 objArrayOop _mirrors;
1336 typeArrayOop _cprefs; // needed to insulate method name against redefinition
1337 int _index;
1338 No_Safepoint_Verifier _nsv;
1339
1340 public:
1341
1342 enum {
1343 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1344 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1345 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1346 trace_cprefs_offset = java_lang_Throwable::trace_cprefs_offset,
1347 trace_next_offset = java_lang_Throwable::trace_next_offset,
1348 trace_size = java_lang_Throwable::trace_size,
1349 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1350 };
1351
1352 // get info out of chunks
1353 static typeArrayOop get_methods(objArrayHandle chunk) {
1354 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1355 assert(methods != NULL, "method array should be initialized in backtrace");
1356 return methods;
1357 }
1358 static typeArrayOop get_bcis(objArrayHandle chunk) {
1359 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1360 assert(bcis != NULL, "bci array should be initialized in backtrace");
1361 return bcis;
1362 }
1363 static objArrayOop get_mirrors(objArrayHandle chunk) {
1364 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1365 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1366 return mirrors;
1367 }
1368 static typeArrayOop get_cprefs(objArrayHandle chunk) {
1369 typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset));
1370 assert(cprefs != NULL, "cprefs array should be initialized in backtrace");
1371 return cprefs;
1372 }
1373
1374 // constructor for new backtrace
1375 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) {
1376 expand(CHECK);
1377 _backtrace = _head;
1378 _index = 0;
1379 }
1380
1381 BacktraceBuilder(objArrayHandle backtrace) {
1382 _methods = get_methods(backtrace);
1383 _bcis = get_bcis(backtrace);
1384 _mirrors = get_mirrors(backtrace);
1385 _cprefs = get_cprefs(backtrace);
1386 assert(_methods->length() == _bcis->length() &&
1387 _methods->length() == _mirrors->length(),
1388 "method and source information arrays should match");
1389
1390 // head is the preallocated backtrace
1391 _backtrace = _head = backtrace();
1392 _index = 0;
1393 }
1394
1395 void expand(TRAPS) {
1396 objArrayHandle old_head(THREAD, _head);
1397 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1398
1399 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1400 objArrayHandle new_head(THREAD, head);
1401
1402 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1403 typeArrayHandle new_methods(THREAD, methods);
1404
1405 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1406 typeArrayHandle new_bcis(THREAD, bcis);
1407
1408 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1409 objArrayHandle new_mirrors(THREAD, mirrors);
1410
1411 typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1412 typeArrayHandle new_cprefs(THREAD, cprefs);
1413
1414 if (!old_head.is_null()) {
1415 old_head->obj_at_put(trace_next_offset, new_head());
1416 }
1417 new_head->obj_at_put(trace_methods_offset, new_methods());
1418 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1419 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1420 new_head->obj_at_put(trace_cprefs_offset, new_cprefs());
1421
1422 _head = new_head();
1423 _methods = new_methods();
1424 _bcis = new_bcis();
1425 _mirrors = new_mirrors();
1426 _cprefs = new_cprefs();
1427 _index = 0;
1428 }
1429
1430 oop backtrace() {
1431 return _backtrace();
1432 }
1433
1434 inline void push(Method* method, int bci, TRAPS) {
1435 // Smear the -1 bci to 0 since the array only holds unsigned
1436 // shorts. The later line number lookup would just smear the -1
1437 // to a 0 even if it could be recorded.
1438 if (bci == SynchronizationEntryBCI) bci = 0;
1439
1440 if (_index >= trace_chunk_size) {
1441 methodHandle mhandle(THREAD, method);
1442 expand(CHECK);
1443 method = mhandle();
1444 }
1445
1446 _methods->short_at_put(_index, method->orig_method_idnum());
1447 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version()));
1448 _cprefs->short_at_put(_index, method->name_index());
1449
1450 // We need to save the mirrors in the backtrace to keep the class
1451 // from being unloaded while we still have this stack trace.
1452 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1453 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1454 _index++;
1455 }
1456
1457 };
1458
1459 // Print stack trace element to resource allocated buffer
1460 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
1461 int method_id, int version, int bci, int cpref) {
1462
1463 // Get strings and string lengths
1464 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1465 const char* klass_name = holder->external_name();
1466 int buf_len = (int)strlen(klass_name);
1467
1468 Method* method = holder->method_with_orig_idnum(method_id, version);
1469
1470 // The method can be NULL if the requested class version is gone
1471 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1472 char* method_name = sym->as_C_string();
1473 buf_len += (int)strlen(method_name);
1474
1475 // Use a specific ik version as a holder since the mirror might
1476 // refer to a version that is now obsolete and no longer accessible
1477 // via the previous versions list.
1478 holder = holder->get_klass_version(version);
1479 char* source_file_name = NULL;
1480 if (holder != NULL) {
1481 Symbol* source = holder->source_file_name();
1482 if (source != NULL) {
1483 source_file_name = source->as_C_string();
1484 buf_len += (int)strlen(source_file_name);
1485 }
1486 }
1487
1488 // Allocate temporary buffer with extra space for formatting and line number
1489 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1490
1491 // Print stack trace line in buffer
1492 sprintf(buf, "\tat %s.%s", klass_name, method_name);
1493
1494 if (!version_matches(method, version)) {
1495 strcat(buf, "(Redefined)");
1496 } else {
1497 int line_number = get_line_number(method, bci);
1498 if (line_number == -2) {
1499 strcat(buf, "(Native Method)");
1500 } else {
1501 if (source_file_name != NULL && (line_number != -1)) {
1502 // Sourcename and linenumber
1503 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1504 } else if (source_file_name != NULL) {
1505 // Just sourcename
1506 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1507 } else {
1508 // Neither sourcename nor linenumber
1509 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1510 }
1511 nmethod* nm = method->code();
1512 if (WizardMode && nm != NULL) {
1513 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1514 }
1515 }
1516 }
1517
1518 return buf;
1519 }
1520
1521 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror,
1522 int method_id, int version, int bci, int cpref) {
1523 ResourceMark rm;
1524 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci, cpref);
1525 st->print_cr("%s", buf);
1526 }
1527
1528 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) {
1529 Handle mirror = method->method_holder()->java_mirror();
1530 int method_id = method->orig_method_idnum();
1531 int version = method->constants()->version();
1532 int cpref = method->name_index();
1533 print_stack_element(st, mirror, method_id, version, bci, cpref);
1534 }
1535
1536 const char* java_lang_Throwable::no_stack_trace_message() {
1537 return "\t<<no stack trace available>>";
1538 }
1539
1540
1541 // Currently used only for exceptions occurring during startup
1542 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1543 Thread *THREAD = Thread::current();
1544 Handle h_throwable(THREAD, throwable);
1545 while (h_throwable.not_null()) {
1546 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1547 if (result.is_null()) {
1548 st->print_cr("%s", no_stack_trace_message());
1549 return;
1550 }
1551
1552 while (result.not_null()) {
1553
1554 // Get method id, bci, version and mirror from chunk
1555 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result));
1556 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result));
1557 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result));
1558 typeArrayHandle cprefs (THREAD, BacktraceBuilder::get_cprefs(result));
1559
1560 int length = methods()->length();
1561 for (int index = 0; index < length; index++) {
1562 Handle mirror(THREAD, mirrors->obj_at(index));
1563 // NULL mirror means end of stack trace
1564 if (mirror.is_null()) goto handle_cause;
1565 int method = methods->short_at(index);
1566 int version = version_at(bcis->int_at(index));
1567 int bci = bci_at(bcis->int_at(index));
1568 int cpref = cprefs->short_at(index);
1569 print_stack_element(st, mirror, method, version, bci, cpref);
1570 }
1571 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1572 }
1573 handle_cause:
1574 {
1575 EXCEPTION_MARK;
1576 JavaValue cause(T_OBJECT);
1577 JavaCalls::call_virtual(&cause,
1578 h_throwable,
1579 KlassHandle(THREAD, h_throwable->klass()),
1580 vmSymbols::getCause_name(),
1581 vmSymbols::void_throwable_signature(),
1582 THREAD);
1583 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1584 if (HAS_PENDING_EXCEPTION) {
1585 CLEAR_PENDING_EXCEPTION;
1586 h_throwable = Handle();
1587 } else {
1588 h_throwable = Handle(THREAD, (oop) cause.get_jobject());
1589 if (h_throwable.not_null()) {
1590 st->print("Caused by: ");
1591 print(h_throwable, st);
1592 st->cr();
1593 }
1594 }
1595 }
1596 }
1597 }
1598
1599 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) {
1600 if (!StackTraceInThrowable) return;
1601 ResourceMark rm(THREAD);
1602
1603 // Start out by clearing the backtrace for this object, in case the VM
1604 // runs out of memory while allocating the stack trace
1605 set_backtrace(throwable(), NULL);
1606 if (JDK_Version::is_gte_jdk14x_version()) {
1607 // New since 1.4, clear lazily constructed Java level stacktrace if
1608 // refilling occurs
1609 // This is unnecessary in 1.7+ but harmless
1610 clear_stacktrace(throwable());
1611 }
1612
1613 int max_depth = MaxJavaStackTraceDepth;
1614 JavaThread* thread = (JavaThread*)THREAD;
1615 BacktraceBuilder bt(CHECK);
1616
1617 // If there is no Java frame just return the method that was being called
1618 // with bci 0
1619 if (!thread->has_last_Java_frame()) {
1620 if (max_depth >= 1 && method() != NULL) {
1621 bt.push(method(), 0, CHECK);
1622 set_backtrace(throwable(), bt.backtrace());
1623 }
1624 return;
1625 }
1626
1627 // Instead of using vframe directly, this version of fill_in_stack_trace
1628 // basically handles everything by hand. This significantly improved the
1629 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1630 // See bug 6333838 for more details.
1631 // The "ASSERT" here is to verify this method generates the exactly same stack
1632 // trace as utilizing vframe.
1633 #ifdef ASSERT
1634 vframeStream st(thread);
1635 methodHandle st_method(THREAD, st.method());
1636 #endif
1637 int total_count = 0;
1638 RegisterMap map(thread, false);
1639 int decode_offset = 0;
1640 nmethod* nm = NULL;
1641 bool skip_fillInStackTrace_check = false;
1642 bool skip_throwableInit_check = false;
1643 bool skip_hidden = !ShowHiddenFrames;
1644
1645 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1646 Method* method = NULL;
1647 int bci = 0;
1648
1649 // Compiled java method case.
1650 if (decode_offset != 0) {
1651 DebugInfoReadStream stream(nm, decode_offset);
1652 decode_offset = stream.read_int();
1653 method = (Method*)nm->metadata_at(stream.read_int());
1654 bci = stream.read_bci();
1655 } else {
1656 if (fr.is_first_frame()) break;
1657 address pc = fr.pc();
1658 if (fr.is_interpreted_frame()) {
1659 intptr_t bcx = fr.interpreter_frame_bcx();
1660 method = fr.interpreter_frame_method();
1661 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
1662 fr = fr.sender(&map);
1663 } else {
1664 CodeBlob* cb = fr.cb();
1665 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1666 // but non nmethod
1667 fr = fr.sender(&map);
1668 if (cb == NULL || !cb->is_nmethod()) {
1669 continue;
1670 }
1671 nm = (nmethod*)cb;
1672 if (nm->method()->is_native()) {
1673 method = nm->method();
1674 bci = 0;
1675 } else {
1676 PcDesc* pd = nm->pc_desc_at(pc);
1677 decode_offset = pd->scope_decode_offset();
1678 // if decode_offset is not equal to 0, it will execute the
1679 // "compiled java method case" at the beginning of the loop.
1680 continue;
1681 }
1682 }
1683 }
1684 #ifdef ASSERT
1685 assert(st_method() == method && st.bci() == bci,
1686 "Wrong stack trace");
1687 st.next();
1688 // vframeStream::method isn't GC-safe so store off a copy
1689 // of the Method* in case we GC.
1690 if (!st.at_end()) {
1691 st_method = st.method();
1692 }
1693 #endif
1694
1695 // the format of the stacktrace will be:
1696 // - 1 or more fillInStackTrace frames for the exception class (skipped)
1697 // - 0 or more <init> methods for the exception class (skipped)
1698 // - rest of the stack
1699
1700 if (!skip_fillInStackTrace_check) {
1701 if ((method->name() == vmSymbols::fillInStackTrace_name() ||
1702 method->name() == vmSymbols::fillInStackTrace0_name()) &&
1703 throwable->is_a(method->method_holder())) {
1704 continue;
1705 }
1706 else {
1707 skip_fillInStackTrace_check = true; // gone past them all
1708 }
1709 }
1710 if (!skip_throwableInit_check) {
1711 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1712
1713 // skip <init> methods of the exception class and superclasses
1714 // This is simlar to classic VM.
1715 if (method->name() == vmSymbols::object_initializer_name() &&
1716 throwable->is_a(method->method_holder())) {
1717 continue;
1718 } else {
1719 // there are none or we've seen them all - either way stop checking
1720 skip_throwableInit_check = true;
1721 }
1722 }
1723 if (method->is_hidden()) {
1724 if (skip_hidden) continue;
1725 }
1726 bt.push(method, bci, CHECK);
1727 total_count++;
1728 }
1729
1730 // Put completed stack trace into throwable object
1731 set_backtrace(throwable(), bt.backtrace());
1732 }
1733
1734 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) {
1735 // No-op if stack trace is disabled
1736 if (!StackTraceInThrowable) {
1737 return;
1738 }
1739
1740 // Disable stack traces for some preallocated out of memory errors
1741 if (!Universe::should_fill_in_stack_trace(throwable)) {
1742 return;
1743 }
1744
1745 PRESERVE_EXCEPTION_MARK;
1746
1747 JavaThread* thread = JavaThread::active();
1748 fill_in_stack_trace(throwable, method, thread);
1749 // ignore exceptions thrown during stack trace filling
1750 CLEAR_PENDING_EXCEPTION;
1751 }
1752
1753 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1754 // Allocate stack trace - backtrace is created but not filled in
1755
1756 // No-op if stack trace is disabled
1757 if (!StackTraceInThrowable) return;
1758 BacktraceBuilder bt(CHECK); // creates a backtrace
1759 set_backtrace(throwable(), bt.backtrace());
1760 }
1761
1762
1763 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1764 // Fill in stack trace into preallocated backtrace (no GC)
1765
1766 // No-op if stack trace is disabled
1767 if (!StackTraceInThrowable) return;
1768
1769 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1770
1771 JavaThread* THREAD = JavaThread::current();
1772
1773 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
1774 assert(backtrace.not_null(), "backtrace should have been preallocated");
1775
1776 ResourceMark rm(THREAD);
1777 vframeStream st(THREAD);
1778
1779 BacktraceBuilder bt(backtrace);
1780
1781 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1782 // methods as preallocated errors aren't created by "java" code.
1783
1784 // fill in as much stack trace as possible
1785 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace);
1786 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1787 int chunk_count = 0;
1788
1789 for (;!st.at_end(); st.next()) {
1790 bt.push(st.method(), st.bci(), CHECK);
1791 chunk_count++;
1792
1793 // Bail-out for deep stacks
1794 if (chunk_count >= max_chunks) break;
1795 }
1796
1797 // For Java 7+ we support the Throwable immutability protocol defined for Java 7. This support
1798 // was missing in 7u0 so in 7u0 there is a workaround in the Throwable class. That workaround
1799 // can be removed in a JDK using this JVM version
1800 if (JDK_Version::is_gte_jdk17x_version()) {
1801 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
1802 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
1803 }
1804 }
1805
1806
1807 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1808 if (throwable == NULL) {
1809 THROW_0(vmSymbols::java_lang_NullPointerException());
1810 }
1811 objArrayOop chunk = objArrayOop(backtrace(throwable));
1812 int depth = 0;
1813 if (chunk != NULL) {
1814 // Iterate over chunks and count full ones
1815 while (true) {
1816 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1817 if (next == NULL) break;
1818 depth += trace_chunk_size;
1819 chunk = next;
1820 }
1821 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1822 // Count element in remaining partial chunk. NULL value for mirror
1823 // marks the end of the stack trace elements that are saved.
1824 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1825 assert(mirrors != NULL, "sanity check");
1826 for (int i = 0; i < mirrors->length(); i++) {
1827 if (mirrors->obj_at(i) == NULL) break;
1828 depth++;
1829 }
1830 }
1831 return depth;
1832 }
1833
1834
1835 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1836 if (throwable == NULL) {
1837 THROW_0(vmSymbols::java_lang_NullPointerException());
1838 }
1839 if (index < 0) {
1840 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1841 }
1842 // Compute how many chunks to skip and index into actual chunk
1843 objArrayOop chunk = objArrayOop(backtrace(throwable));
1844 int skip_chunks = index / trace_chunk_size;
1845 int chunk_index = index % trace_chunk_size;
1846 while (chunk != NULL && skip_chunks > 0) {
1847 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1848 skip_chunks--;
1849 }
1850 if (chunk == NULL) {
1851 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1852 }
1853 // Get method id, bci, version, mirror and cpref from chunk
1854 typeArrayOop methods = BacktraceBuilder::get_methods(chunk);
1855 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk);
1856 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1857 typeArrayOop cprefs = BacktraceBuilder::get_cprefs(chunk);
1858
1859 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check");
1860
1861 int method = methods->short_at(chunk_index);
1862 int version = version_at(bcis->int_at(chunk_index));
1863 int bci = bci_at(bcis->int_at(chunk_index));
1864 int cpref = cprefs->short_at(chunk_index);
1865 Handle mirror(THREAD, mirrors->obj_at(chunk_index));
1866
1867 // Chunk can be partial full
1868 if (mirror.is_null()) {
1869 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1870 }
1871 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, cpref, CHECK_0);
1872 return element;
1873 }
1874
1875 oop java_lang_StackTraceElement::create(Handle mirror, int method_id,
1876 int version, int bci, int cpref, TRAPS) {
1877 // Allocate java.lang.StackTraceElement instance
1878 Klass* k = SystemDictionary::StackTraceElement_klass();
1879 assert(k != NULL, "must be loaded in 1.4+");
1880 instanceKlassHandle ik (THREAD, k);
1881 if (ik->should_be_initialized()) {
1882 ik->initialize(CHECK_0);
1883 }
1884
1885 Handle element = ik->allocate_instance_handle(CHECK_0);
1886 // Fill in class name
1887 ResourceMark rm(THREAD);
1888 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1889 const char* str = holder->external_name();
1890 oop classname = StringTable::intern((char*) str, CHECK_0);
1891 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1892
1893 Method* method = holder->method_with_orig_idnum(method_id, version);
1894
1895 // The method can be NULL if the requested class version is gone
1896 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1897
1898 // Fill in method name
1899 oop methodname = StringTable::intern(sym, CHECK_0);
1900 java_lang_StackTraceElement::set_methodName(element(), methodname);
1901
1902 if (!version_matches(method, version)) {
1903 // The method was redefined, accurate line number information isn't available
1904 java_lang_StackTraceElement::set_fileName(element(), NULL);
1905 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1906 } else {
1907 // Fill in source file name and line number.
1908 // Use a specific ik version as a holder since the mirror might
1909 // refer to a version that is now obsolete and no longer accessible
1910 // via the previous versions list.
1911 holder = holder->get_klass_version(version);
1912 assert(holder != NULL, "sanity check");
1913 Symbol* source = holder->source_file_name();
1914 if (ShowHiddenFrames && source == NULL)
1915 source = vmSymbols::unknown_class_name();
1916 oop filename = StringTable::intern(source, CHECK_0);
1917 java_lang_StackTraceElement::set_fileName(element(), filename);
1918
1919 int line_number = get_line_number(method, bci);
1920 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1921 }
1922 return element();
1923 }
1924
1925 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1926 Handle mirror (THREAD, method->method_holder()->java_mirror());
1927 int method_id = method->orig_method_idnum();
1928 int cpref = method->name_index();
1929 return create(mirror, method_id, method->constants()->version(), bci, cpref, THREAD);
1930 }
1931
1932 void java_lang_reflect_AccessibleObject::compute_offsets() {
1933 Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
1934 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1935 }
1936
1937 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1938 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1939 return (jboolean) reflect->bool_field(override_offset);
1940 }
1941
1942 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1943 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1944 reflect->bool_field_put(override_offset, (int) value);
1945 }
1946
1947 void java_lang_reflect_Method::compute_offsets() {
1948 Klass* k = SystemDictionary::reflect_Method_klass();
1949 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1950 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1951 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1952 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1953 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1954 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1955 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1956 // The generic signature and annotations fields are only present in 1.5
1957 signature_offset = -1;
1958 annotations_offset = -1;
1959 parameter_annotations_offset = -1;
1960 annotation_default_offset = -1;
1961 type_annotations_offset = -1;
1962 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1963 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1964 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1965 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1966 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
1967 }
1968
1969 Handle java_lang_reflect_Method::create(TRAPS) {
1970 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1971 Klass* klass = SystemDictionary::reflect_Method_klass();
1972 // This class is eagerly initialized during VM initialization, since we keep a refence
1973 // to one of the methods
1974 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
1975 return InstanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH);
1976 }
1977
1978 oop java_lang_reflect_Method::clazz(oop reflect) {
1979 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1980 return reflect->obj_field(clazz_offset);
1981 }
1982
1983 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1984 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1985 reflect->obj_field_put(clazz_offset, value);
1986 }
1987
1988 int java_lang_reflect_Method::slot(oop reflect) {
1989 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1990 return reflect->int_field(slot_offset);
1991 }
1992
1993 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1994 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1995 reflect->int_field_put(slot_offset, value);
1996 }
1997
1998 oop java_lang_reflect_Method::name(oop method) {
1999 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2000 return method->obj_field(name_offset);
2001 }
2002
2003 void java_lang_reflect_Method::set_name(oop method, oop value) {
2004 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2005 method->obj_field_put(name_offset, value);
2006 }
2007
2008 oop java_lang_reflect_Method::return_type(oop method) {
2009 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2010 return method->obj_field(returnType_offset);
2011 }
2012
2013 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2014 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2015 method->obj_field_put(returnType_offset, value);
2016 }
2017
2018 oop java_lang_reflect_Method::parameter_types(oop method) {
2019 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2020 return method->obj_field(parameterTypes_offset);
2021 }
2022
2023 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2024 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2025 method->obj_field_put(parameterTypes_offset, value);
2026 }
2027
2028 oop java_lang_reflect_Method::exception_types(oop method) {
2029 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2030 return method->obj_field(exceptionTypes_offset);
2031 }
2032
2033 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2034 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2035 method->obj_field_put(exceptionTypes_offset, value);
2036 }
2037
2038 int java_lang_reflect_Method::modifiers(oop method) {
2039 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2040 return method->int_field(modifiers_offset);
2041 }
2042
2043 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2044 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2045 method->int_field_put(modifiers_offset, value);
2046 }
2047
2048 bool java_lang_reflect_Method::has_signature_field() {
2049 return (signature_offset >= 0);
2050 }
2051
2052 oop java_lang_reflect_Method::signature(oop method) {
2053 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2054 assert(has_signature_field(), "signature field must be present");
2055 return method->obj_field(signature_offset);
2056 }
2057
2058 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2059 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2060 assert(has_signature_field(), "signature field must be present");
2061 method->obj_field_put(signature_offset, value);
2062 }
2063
2064 bool java_lang_reflect_Method::has_annotations_field() {
2065 return (annotations_offset >= 0);
2066 }
2067
2068 oop java_lang_reflect_Method::annotations(oop method) {
2069 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2070 assert(has_annotations_field(), "annotations field must be present");
2071 return method->obj_field(annotations_offset);
2072 }
2073
2074 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2075 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2076 assert(has_annotations_field(), "annotations field must be present");
2077 method->obj_field_put(annotations_offset, value);
2078 }
2079
2080 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2081 return (parameter_annotations_offset >= 0);
2082 }
2083
2084 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2085 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2086 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2087 return method->obj_field(parameter_annotations_offset);
2088 }
2089
2090 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2091 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2092 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2093 method->obj_field_put(parameter_annotations_offset, value);
2094 }
2095
2096 bool java_lang_reflect_Method::has_annotation_default_field() {
2097 return (annotation_default_offset >= 0);
2098 }
2099
2100 oop java_lang_reflect_Method::annotation_default(oop method) {
2101 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2102 assert(has_annotation_default_field(), "annotation default field must be present");
2103 return method->obj_field(annotation_default_offset);
2104 }
2105
2106 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2107 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2108 assert(has_annotation_default_field(), "annotation default field must be present");
2109 method->obj_field_put(annotation_default_offset, value);
2110 }
2111
2112 bool java_lang_reflect_Method::has_type_annotations_field() {
2113 return (type_annotations_offset >= 0);
2114 }
2115
2116 oop java_lang_reflect_Method::type_annotations(oop method) {
2117 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2118 assert(has_type_annotations_field(), "type_annotations field must be present");
2119 return method->obj_field(type_annotations_offset);
2120 }
2121
2122 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2123 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2124 assert(has_type_annotations_field(), "type_annotations field must be present");
2125 method->obj_field_put(type_annotations_offset, value);
2126 }
2127
2128 void java_lang_reflect_Constructor::compute_offsets() {
2129 Klass* k = SystemDictionary::reflect_Constructor_klass();
2130 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2131 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2132 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2133 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2134 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2135 // The generic signature and annotations fields are only present in 1.5
2136 signature_offset = -1;
2137 annotations_offset = -1;
2138 parameter_annotations_offset = -1;
2139 type_annotations_offset = -1;
2140 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2141 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2142 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2143 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2144 }
2145
2146 Handle java_lang_reflect_Constructor::create(TRAPS) {
2147 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2148 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2149 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2150 instanceKlassHandle klass (THREAD, k);
2151 // Ensure it is initialized
2152 klass->initialize(CHECK_NH);
2153 return klass->allocate_instance_handle(CHECK_NH);
2154 }
2155
2156 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2157 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2158 return reflect->obj_field(clazz_offset);
2159 }
2160
2161 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2162 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2163 reflect->obj_field_put(clazz_offset, value);
2164 }
2165
2166 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2167 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2168 return constructor->obj_field(parameterTypes_offset);
2169 }
2170
2171 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2172 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2173 constructor->obj_field_put(parameterTypes_offset, value);
2174 }
2175
2176 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2177 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2178 return constructor->obj_field(exceptionTypes_offset);
2179 }
2180
2181 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2182 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2183 constructor->obj_field_put(exceptionTypes_offset, value);
2184 }
2185
2186 int java_lang_reflect_Constructor::slot(oop reflect) {
2187 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2188 return reflect->int_field(slot_offset);
2189 }
2190
2191 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2192 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2193 reflect->int_field_put(slot_offset, value);
2194 }
2195
2196 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2197 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2198 return constructor->int_field(modifiers_offset);
2199 }
2200
2201 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2202 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2203 constructor->int_field_put(modifiers_offset, value);
2204 }
2205
2206 bool java_lang_reflect_Constructor::has_signature_field() {
2207 return (signature_offset >= 0);
2208 }
2209
2210 oop java_lang_reflect_Constructor::signature(oop constructor) {
2211 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2212 assert(has_signature_field(), "signature field must be present");
2213 return constructor->obj_field(signature_offset);
2214 }
2215
2216 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2217 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2218 assert(has_signature_field(), "signature field must be present");
2219 constructor->obj_field_put(signature_offset, value);
2220 }
2221
2222 bool java_lang_reflect_Constructor::has_annotations_field() {
2223 return (annotations_offset >= 0);
2224 }
2225
2226 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2227 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2228 assert(has_annotations_field(), "annotations field must be present");
2229 return constructor->obj_field(annotations_offset);
2230 }
2231
2232 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2233 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2234 assert(has_annotations_field(), "annotations field must be present");
2235 constructor->obj_field_put(annotations_offset, value);
2236 }
2237
2238 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2239 return (parameter_annotations_offset >= 0);
2240 }
2241
2242 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2243 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2244 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2245 return method->obj_field(parameter_annotations_offset);
2246 }
2247
2248 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2249 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2250 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2251 method->obj_field_put(parameter_annotations_offset, value);
2252 }
2253
2254 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2255 return (type_annotations_offset >= 0);
2256 }
2257
2258 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2259 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2260 assert(has_type_annotations_field(), "type_annotations field must be present");
2261 return constructor->obj_field(type_annotations_offset);
2262 }
2263
2264 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2265 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2266 assert(has_type_annotations_field(), "type_annotations field must be present");
2267 constructor->obj_field_put(type_annotations_offset, value);
2268 }
2269
2270 void java_lang_reflect_Field::compute_offsets() {
2271 Klass* k = SystemDictionary::reflect_Field_klass();
2272 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2273 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2274 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
2275 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2276 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2277 // The generic signature and annotations fields are only present in 1.5
2278 signature_offset = -1;
2279 annotations_offset = -1;
2280 type_annotations_offset = -1;
2281 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2282 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2283 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2284 }
2285
2286 Handle java_lang_reflect_Field::create(TRAPS) {
2287 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2288 Symbol* name = vmSymbols::java_lang_reflect_Field();
2289 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2290 instanceKlassHandle klass (THREAD, k);
2291 // Ensure it is initialized
2292 klass->initialize(CHECK_NH);
2293 return klass->allocate_instance_handle(CHECK_NH);
2294 }
2295
2296 oop java_lang_reflect_Field::clazz(oop reflect) {
2297 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2298 return reflect->obj_field(clazz_offset);
2299 }
2300
2301 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2302 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2303 reflect->obj_field_put(clazz_offset, value);
2304 }
2305
2306 oop java_lang_reflect_Field::name(oop field) {
2307 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2308 return field->obj_field(name_offset);
2309 }
2310
2311 void java_lang_reflect_Field::set_name(oop field, oop value) {
2312 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2313 field->obj_field_put(name_offset, value);
2314 }
2315
2316 oop java_lang_reflect_Field::type(oop field) {
2317 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2318 return field->obj_field(type_offset);
2319 }
2320
2321 void java_lang_reflect_Field::set_type(oop field, oop value) {
2322 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2323 field->obj_field_put(type_offset, value);
2324 }
2325
2326 int java_lang_reflect_Field::slot(oop reflect) {
2327 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2328 return reflect->int_field(slot_offset);
2329 }
2330
2331 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2332 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2333 reflect->int_field_put(slot_offset, value);
2334 }
2335
2336 int java_lang_reflect_Field::modifiers(oop field) {
2337 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2338 return field->int_field(modifiers_offset);
2339 }
2340
2341 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2342 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2343 field->int_field_put(modifiers_offset, value);
2344 }
2345
2346 bool java_lang_reflect_Field::has_signature_field() {
2347 return (signature_offset >= 0);
2348 }
2349
2350 oop java_lang_reflect_Field::signature(oop field) {
2351 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2352 assert(has_signature_field(), "signature field must be present");
2353 return field->obj_field(signature_offset);
2354 }
2355
2356 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2357 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2358 assert(has_signature_field(), "signature field must be present");
2359 field->obj_field_put(signature_offset, value);
2360 }
2361
2362 bool java_lang_reflect_Field::has_annotations_field() {
2363 return (annotations_offset >= 0);
2364 }
2365
2366 oop java_lang_reflect_Field::annotations(oop field) {
2367 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2368 assert(has_annotations_field(), "annotations field must be present");
2369 return field->obj_field(annotations_offset);
2370 }
2371
2372 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2373 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2374 assert(has_annotations_field(), "annotations field must be present");
2375 field->obj_field_put(annotations_offset, value);
2376 }
2377
2378 bool java_lang_reflect_Field::has_type_annotations_field() {
2379 return (type_annotations_offset >= 0);
2380 }
2381
2382 oop java_lang_reflect_Field::type_annotations(oop field) {
2383 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2384 assert(has_type_annotations_field(), "type_annotations field must be present");
2385 return field->obj_field(type_annotations_offset);
2386 }
2387
2388 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2389 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2390 assert(has_type_annotations_field(), "type_annotations field must be present");
2391 field->obj_field_put(type_annotations_offset, value);
2392 }
2393
2394 void sun_reflect_ConstantPool::compute_offsets() {
2395 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2396 // This null test can be removed post beta
2397 if (k != NULL) {
2398 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2399 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2400 }
2401 }
2402
2403 void java_lang_reflect_Parameter::compute_offsets() {
2404 Klass* k = SystemDictionary::reflect_Parameter_klass();
2405 if(NULL != k) {
2406 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2407 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2408 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature());
2409 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature());
2410 }
2411 }
2412
2413 Handle java_lang_reflect_Parameter::create(TRAPS) {
2414 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2415 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2416 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2417 instanceKlassHandle klass (THREAD, k);
2418 // Ensure it is initialized
2419 klass->initialize(CHECK_NH);
2420 return klass->allocate_instance_handle(CHECK_NH);
2421 }
2422
2423 oop java_lang_reflect_Parameter::name(oop param) {
2424 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2425 return param->obj_field(name_offset);
2426 }
2427
2428 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2429 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2430 param->obj_field_put(name_offset, value);
2431 }
2432
2433 int java_lang_reflect_Parameter::modifiers(oop param) {
2434 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2435 return param->int_field(modifiers_offset);
2436 }
2437
2438 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2439 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2440 param->int_field_put(modifiers_offset, value);
2441 }
2442
2443 int java_lang_reflect_Parameter::index(oop param) {
2444 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2445 return param->int_field(index_offset);
2446 }
2447
2448 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2449 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2450 param->int_field_put(index_offset, value);
2451 }
2452
2453 oop java_lang_reflect_Parameter::executable(oop param) {
2454 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2455 return param->obj_field(executable_offset);
2456 }
2457
2458 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2459 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2460 param->obj_field_put(executable_offset, value);
2461 }
2462
2463
2464 Handle sun_reflect_ConstantPool::create(TRAPS) {
2465 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2466 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2467 instanceKlassHandle klass (THREAD, k);
2468 // Ensure it is initialized
2469 klass->initialize(CHECK_NH);
2470 return klass->allocate_instance_handle(CHECK_NH);
2471 }
2472
2473
2474 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2475 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2476 oop mirror = value->pool_holder()->java_mirror();
2477 // Save the mirror to get back the constant pool.
2478 reflect->obj_field_put(_oop_offset, mirror);
2479 }
2480
2481 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) {
2482 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2483
2484 oop mirror = reflect->obj_field(_oop_offset);
2485 Klass* k = java_lang_Class::as_Klass(mirror);
2486 assert(k->oop_is_instance(), "Must be");
2487
2488 // Get the constant pool back from the klass. Since class redefinition
2489 // merges the new constant pool into the old, this is essentially the
2490 // same constant pool as the original. If constant pool merging is
2491 // no longer done in the future, this will have to change to save
2492 // the original.
2493 return InstanceKlass::cast(k)->constants();
2494 }
2495
2496 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2497 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2498 // This null test can be removed post beta
2499 if (k != NULL) {
2500 compute_offset(_base_offset, k,
2501 vmSymbols::base_name(), vmSymbols::object_signature());
2502 }
2503 }
2504
2505 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2506 Klass* k = SystemDictionary::box_klass(type);
2507 if (k == NULL) return NULL;
2508 instanceKlassHandle h (THREAD, k);
2509 if (!h->is_initialized()) h->initialize(CHECK_0);
2510 return h->allocate_instance(THREAD);
2511 }
2512
2513
2514 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2515 oop box = initialize_and_allocate(type, CHECK_0);
2516 if (box == NULL) return NULL;
2517 switch (type) {
2518 case T_BOOLEAN:
2519 box->bool_field_put(value_offset, value->z);
2520 break;
2521 case T_CHAR:
2522 box->char_field_put(value_offset, value->c);
2523 break;
2524 case T_FLOAT:
2525 box->float_field_put(value_offset, value->f);
2526 break;
2527 case T_DOUBLE:
2528 box->double_field_put(long_value_offset, value->d);
2529 break;
2530 case T_BYTE:
2531 box->byte_field_put(value_offset, value->b);
2532 break;
2533 case T_SHORT:
2534 box->short_field_put(value_offset, value->s);
2535 break;
2536 case T_INT:
2537 box->int_field_put(value_offset, value->i);
2538 break;
2539 case T_LONG:
2540 box->long_field_put(long_value_offset, value->j);
2541 break;
2542 default:
2543 return NULL;
2544 }
2545 return box;
2546 }
2547
2548
2549 BasicType java_lang_boxing_object::basic_type(oop box) {
2550 if (box == NULL) return T_ILLEGAL;
2551 BasicType type = SystemDictionary::box_klass_type(box->klass());
2552 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2553 return T_ILLEGAL;
2554 return type;
2555 }
2556
2557
2558 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2559 BasicType type = SystemDictionary::box_klass_type(box->klass());
2560 switch (type) {
2561 case T_BOOLEAN:
2562 value->z = box->bool_field(value_offset);
2563 break;
2564 case T_CHAR:
2565 value->c = box->char_field(value_offset);
2566 break;
2567 case T_FLOAT:
2568 value->f = box->float_field(value_offset);
2569 break;
2570 case T_DOUBLE:
2571 value->d = box->double_field(long_value_offset);
2572 break;
2573 case T_BYTE:
2574 value->b = box->byte_field(value_offset);
2575 break;
2576 case T_SHORT:
2577 value->s = box->short_field(value_offset);
2578 break;
2579 case T_INT:
2580 value->i = box->int_field(value_offset);
2581 break;
2582 case T_LONG:
2583 value->j = box->long_field(long_value_offset);
2584 break;
2585 default:
2586 return T_ILLEGAL;
2587 } // end switch
2588 return type;
2589 }
2590
2591
2592 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2593 BasicType type = SystemDictionary::box_klass_type(box->klass());
2594 switch (type) {
2595 case T_BOOLEAN:
2596 box->bool_field_put(value_offset, value->z);
2597 break;
2598 case T_CHAR:
2599 box->char_field_put(value_offset, value->c);
2600 break;
2601 case T_FLOAT:
2602 box->float_field_put(value_offset, value->f);
2603 break;
2604 case T_DOUBLE:
2605 box->double_field_put(long_value_offset, value->d);
2606 break;
2607 case T_BYTE:
2608 box->byte_field_put(value_offset, value->b);
2609 break;
2610 case T_SHORT:
2611 box->short_field_put(value_offset, value->s);
2612 break;
2613 case T_INT:
2614 box->int_field_put(value_offset, value->i);
2615 break;
2616 case T_LONG:
2617 box->long_field_put(long_value_offset, value->j);
2618 break;
2619 default:
2620 return T_ILLEGAL;
2621 } // end switch
2622 return type;
2623 }
2624
2625
2626 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2627 switch (type) {
2628 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2629 case T_CHAR: st->print("%d", value->c); break;
2630 case T_BYTE: st->print("%d", value->b); break;
2631 case T_SHORT: st->print("%d", value->s); break;
2632 case T_INT: st->print("%d", value->i); break;
2633 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2634 case T_FLOAT: st->print("%f", value->f); break;
2635 case T_DOUBLE: st->print("%lf", value->d); break;
2636 default: st->print("type %d?", type); break;
2637 }
2638 }
2639
2640
2641 // Support for java_lang_ref_Reference
2642 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() {
2643 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2644 address addr = ik->static_field_addr(static_lock_offset);
2645 return (HeapWord*) addr;
2646 }
2647
2648 oop java_lang_ref_Reference::pending_list_lock() {
2649 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2650 address addr = ik->static_field_addr(static_lock_offset);
2651 if (UseCompressedOops) {
2652 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2653 } else {
2654 return oopDesc::load_decode_heap_oop((oop*)addr);
2655 }
2656 }
2657
2658 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2659 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2660 address addr = ik->static_field_addr(static_pending_offset);
2661 // XXX This might not be HeapWord aligned, almost rather be char *.
2662 return (HeapWord*)addr;
2663 }
2664
2665 oop java_lang_ref_Reference::pending_list() {
2666 char *addr = (char *)pending_list_addr();
2667 if (UseCompressedOops) {
2668 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2669 } else {
2670 return oopDesc::load_decode_heap_oop((oop*)addr);
2671 }
2672 }
2673
2674
2675 // Support for java_lang_ref_SoftReference
2676
2677 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2678 return ref->long_field(timestamp_offset);
2679 }
2680
2681 jlong java_lang_ref_SoftReference::clock() {
2682 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2683 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2684 return *offset;
2685 }
2686
2687 void java_lang_ref_SoftReference::set_clock(jlong value) {
2688 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2689 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2690 *offset = value;
2691 }
2692
2693 // Support for java_lang_invoke_DirectMethodHandle
2694
2695 int java_lang_invoke_DirectMethodHandle::_member_offset;
2696
2697 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
2698 oop member_name = NULL;
2699 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
2700 assert(is_dmh, "a DirectMethodHandle oop is expected");
2701 if (is_dmh) {
2702 member_name = dmh->obj_field(member_offset_in_bytes());
2703 }
2704 return member_name;
2705 }
2706
2707 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
2708 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
2709 if (klass_oop != NULL && EnableInvokeDynamic) {
2710 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2711 }
2712 }
2713
2714 // Support for java_lang_invoke_MethodHandle
2715
2716 int java_lang_invoke_MethodHandle::_type_offset;
2717 int java_lang_invoke_MethodHandle::_form_offset;
2718
2719 int java_lang_invoke_MemberName::_clazz_offset;
2720 int java_lang_invoke_MemberName::_name_offset;
2721 int java_lang_invoke_MemberName::_type_offset;
2722 int java_lang_invoke_MemberName::_flags_offset;
2723 int java_lang_invoke_MemberName::_vmtarget_offset;
2724 int java_lang_invoke_MemberName::_vmloader_offset;
2725 int java_lang_invoke_MemberName::_vmindex_offset;
2726
2727 int java_lang_invoke_LambdaForm::_vmentry_offset;
2728
2729 void java_lang_invoke_MethodHandle::compute_offsets() {
2730 Klass* klass_oop = SystemDictionary::MethodHandle_klass();
2731 if (klass_oop != NULL && EnableInvokeDynamic) {
2732 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
2733 compute_optional_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
2734 if (_form_offset == 0) {
2735 EnableInvokeDynamic = false;
2736 }
2737 }
2738 }
2739
2740 void java_lang_invoke_MemberName::compute_offsets() {
2741 Klass* klass_oop = SystemDictionary::MemberName_klass();
2742 if (klass_oop != NULL && EnableInvokeDynamic) {
2743 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature());
2744 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature());
2745 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature());
2746 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature());
2747 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2748 }
2749 }
2750
2751 void java_lang_invoke_LambdaForm::compute_offsets() {
2752 Klass* klass_oop = SystemDictionary::LambdaForm_klass();
2753 if (klass_oop != NULL && EnableInvokeDynamic) {
2754 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2755 }
2756 }
2757
2758 oop java_lang_invoke_MethodHandle::type(oop mh) {
2759 return mh->obj_field(_type_offset);
2760 }
2761
2762 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
2763 mh->obj_field_put(_type_offset, mtype);
2764 }
2765
2766 oop java_lang_invoke_MethodHandle::form(oop mh) {
2767 assert(_form_offset != 0, "");
2768 return mh->obj_field(_form_offset);
2769 }
2770
2771 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
2772 assert(_form_offset != 0, "");
2773 mh->obj_field_put(_form_offset, lform);
2774 }
2775
2776 /// MemberName accessors
2777
2778 oop java_lang_invoke_MemberName::clazz(oop mname) {
2779 assert(is_instance(mname), "wrong type");
2780 return mname->obj_field(_clazz_offset);
2781 }
2782
2783 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
2784 assert(is_instance(mname), "wrong type");
2785 mname->obj_field_put(_clazz_offset, clazz);
2786 }
2787
2788 oop java_lang_invoke_MemberName::name(oop mname) {
2789 assert(is_instance(mname), "wrong type");
2790 return mname->obj_field(_name_offset);
2791 }
2792
2793 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
2794 assert(is_instance(mname), "wrong type");
2795 mname->obj_field_put(_name_offset, name);
2796 }
2797
2798 oop java_lang_invoke_MemberName::type(oop mname) {
2799 assert(is_instance(mname), "wrong type");
2800 return mname->obj_field(_type_offset);
2801 }
2802
2803 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
2804 assert(is_instance(mname), "wrong type");
2805 mname->obj_field_put(_type_offset, type);
2806 }
2807
2808 int java_lang_invoke_MemberName::flags(oop mname) {
2809 assert(is_instance(mname), "wrong type");
2810 return mname->int_field(_flags_offset);
2811 }
2812
2813 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
2814 assert(is_instance(mname), "wrong type");
2815 mname->int_field_put(_flags_offset, flags);
2816 }
2817
2818 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
2819 assert(is_instance(mname), "wrong type");
2820 return (Metadata*)mname->address_field(_vmtarget_offset);
2821 }
2822
2823 bool java_lang_invoke_MemberName::is_method(oop mname) {
2824 assert(is_instance(mname), "must be MemberName");
2825 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
2826 }
2827
2828 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
2829 assert(is_instance(mname), "wrong type");
2830 // check the type of the vmtarget
2831 oop dependency = NULL;
2832 if (ref != NULL) {
2833 switch (flags(mname) & (MN_IS_METHOD |
2834 MN_IS_CONSTRUCTOR |
2835 MN_IS_FIELD)) {
2836 case MN_IS_METHOD:
2837 case MN_IS_CONSTRUCTOR:
2838 assert(ref->is_method(), "should be a method");
2839 dependency = ((Method*)ref)->method_holder()->java_mirror();
2840 break;
2841 case MN_IS_FIELD:
2842 assert(ref->is_klass(), "should be a class");
2843 dependency = ((Klass*)ref)->java_mirror();
2844 break;
2845 default:
2846 ShouldNotReachHere();
2847 }
2848 }
2849 mname->address_field_put(_vmtarget_offset, (address)ref);
2850 // Add a reference to the loader (actually mirror because anonymous classes will not have
2851 // distinct loaders) to ensure the metadata is kept alive
2852 // This mirror may be different than the one in clazz field.
2853 mname->obj_field_put(_vmloader_offset, dependency);
2854 }
2855
2856 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
2857 assert(is_instance(mname), "wrong type");
2858 return (intptr_t) mname->address_field(_vmindex_offset);
2859 }
2860
2861 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
2862 assert(is_instance(mname), "wrong type");
2863 mname->address_field_put(_vmindex_offset, (address) index);
2864 }
2865
2866 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
2867 assert(is_instance(lform), "wrong type");
2868 return lform->obj_field(_vmentry_offset);
2869 }
2870
2871
2872 // Support for java_lang_invoke_MethodType
2873
2874 int java_lang_invoke_MethodType::_rtype_offset;
2875 int java_lang_invoke_MethodType::_ptypes_offset;
2876
2877 void java_lang_invoke_MethodType::compute_offsets() {
2878 Klass* k = SystemDictionary::MethodType_klass();
2879 if (k != NULL) {
2880 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2881 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2882 }
2883 }
2884
2885 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
2886 st->print("(");
2887 objArrayOop pts = ptypes(mt);
2888 for (int i = 0, limit = pts->length(); i < limit; i++) {
2889 java_lang_Class::print_signature(pts->obj_at(i), st);
2890 }
2891 st->print(")");
2892 java_lang_Class::print_signature(rtype(mt), st);
2893 }
2894
2895 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2896 ResourceMark rm;
2897 stringStream buffer(128);
2898 print_signature(mt, &buffer);
2899 const char* sigstr = buffer.base();
2900 int siglen = (int) buffer.size();
2901 Symbol *name;
2902 if (!intern_if_not_found) {
2903 name = SymbolTable::probe(sigstr, siglen);
2904 } else {
2905 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2906 }
2907 return name;
2908 }
2909
2910 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
2911 if (mt1 == mt2)
2912 return true;
2913 if (rtype(mt1) != rtype(mt2))
2914 return false;
2915 if (ptype_count(mt1) != ptype_count(mt2))
2916 return false;
2917 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
2918 if (ptype(mt1, i) != ptype(mt2, i))
2919 return false;
2920 }
2921 return true;
2922 }
2923
2924 oop java_lang_invoke_MethodType::rtype(oop mt) {
2925 assert(is_instance(mt), "must be a MethodType");
2926 return mt->obj_field(_rtype_offset);
2927 }
2928
2929 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
2930 assert(is_instance(mt), "must be a MethodType");
2931 return (objArrayOop) mt->obj_field(_ptypes_offset);
2932 }
2933
2934 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
2935 return ptypes(mt)->obj_at(idx);
2936 }
2937
2938 int java_lang_invoke_MethodType::ptype_count(oop mt) {
2939 return ptypes(mt)->length();
2940 }
2941
2942 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
2943 objArrayOop pts = ptypes(mt);
2944 int count = pts->length();
2945 int slots = 0;
2946 for (int i = 0; i < count; i++) {
2947 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
2948 slots += type2size[bt];
2949 }
2950 return slots;
2951 }
2952
2953 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
2954 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
2955 return type2size[bt];
2956 }
2957
2958
2959 // Support for java_lang_invoke_CallSite
2960
2961 int java_lang_invoke_CallSite::_target_offset;
2962
2963 void java_lang_invoke_CallSite::compute_offsets() {
2964 if (!EnableInvokeDynamic) return;
2965 Klass* k = SystemDictionary::CallSite_klass();
2966 if (k != NULL) {
2967 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
2968 }
2969 }
2970
2971
2972 // Support for java_security_AccessControlContext
2973
2974 int java_security_AccessControlContext::_context_offset = 0;
2975 int java_security_AccessControlContext::_privilegedContext_offset = 0;
2976 int java_security_AccessControlContext::_isPrivileged_offset = 0;
2977 int java_security_AccessControlContext::_isAuthorized_offset = -1;
2978
2979 void java_security_AccessControlContext::compute_offsets() {
2980 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
2981 fieldDescriptor fd;
2982 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass());
2983
2984 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
2985 fatal("Invalid layout of java.security.AccessControlContext");
2986 }
2987 _context_offset = fd.offset();
2988
2989 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
2990 fatal("Invalid layout of java.security.AccessControlContext");
2991 }
2992 _privilegedContext_offset = fd.offset();
2993
2994 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
2995 fatal("Invalid layout of java.security.AccessControlContext");
2996 }
2997 _isPrivileged_offset = fd.offset();
2998
2999 // The offset may not be present for bootstrapping with older JDK.
3000 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
3001 _isAuthorized_offset = fd.offset();
3002 }
3003 }
3004
3005
3006 bool java_security_AccessControlContext::is_authorized(Handle context) {
3007 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
3008 assert(_isAuthorized_offset != -1, "should be set");
3009 return context->bool_field(_isAuthorized_offset) != 0;
3010 }
3011
3012 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3013 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3014 // Ensure klass is initialized
3015 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
3016 // Allocate result
3017 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
3018 // Fill in values
3019 result->obj_field_put(_context_offset, context());
3020 result->obj_field_put(_privilegedContext_offset, privileged_context());
3021 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3022 // whitelist AccessControlContexts created by the JVM if present
3023 if (_isAuthorized_offset != -1) {
3024 result->bool_field_put(_isAuthorized_offset, true);
3025 }
3026 return result;
3027 }
3028
3029
3030 // Support for java_lang_ClassLoader
3031
3032 bool java_lang_ClassLoader::offsets_computed = false;
3033 int java_lang_ClassLoader::_loader_data_offset = -1;
3034 int java_lang_ClassLoader::parallelCapable_offset = -1;
3035
3036 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
3037 assert(loader != NULL && loader->is_oop(), "loader must be oop");
3038 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
3039 }
3040
3041 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
3042 return *java_lang_ClassLoader::loader_data_addr(loader);
3043 }
3044
3045 void java_lang_ClassLoader::compute_offsets() {
3046 assert(!offsets_computed, "offsets should be initialized only once");
3047 offsets_computed = true;
3048
3049 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
3050 Klass* k1 = SystemDictionary::ClassLoader_klass();
3051 compute_optional_offset(parallelCapable_offset,
3052 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
3053
3054 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3055 }
3056
3057 oop java_lang_ClassLoader::parent(oop loader) {
3058 assert(is_instance(loader), "loader must be oop");
3059 return loader->obj_field(parent_offset);
3060 }
3061
3062 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3063 assert(is_instance(loader), "loader must be oop");
3064 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3065 oop acl = loader;
3066 debug_only(jint loop_count = 0);
3067 // This loop taken verbatim from ClassLoader.java:
3068 do {
3069 acl = parent(acl);
3070 if (cl == acl) {
3071 return true;
3072 }
3073 assert(++loop_count > 0, "loop_count overflow");
3074 } while (acl != NULL);
3075 return false;
3076 }
3077
3078
3079 // For class loader classes, parallelCapable defined
3080 // based on non-null field
3081 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3082 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3083 if (!JDK_Version::is_gte_jdk17x_version()
3084 || parallelCapable_offset == -1) {
3085 // Default for backward compatibility is false
3086 return false;
3087 }
3088 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3089 }
3090
3091 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3092 // Fix for 4474172; see evaluation for more details
3093 loader = non_reflection_class_loader(loader);
3094
3095 oop cl = SystemDictionary::java_system_loader();
3096 while(cl != NULL) {
3097 if (cl == loader) return true;
3098 cl = parent(cl);
3099 }
3100 return false;
3101 }
3102
3103 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3104 if (loader != NULL) {
3105 // See whether this is one of the class loaders associated with
3106 // the generated bytecodes for reflection, and if so, "magically"
3107 // delegate to its parent to prevent class loading from occurring
3108 // in places where applications using reflection didn't expect it.
3109 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3110 // This might be null in non-1.4 JDKs
3111 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
3112 return parent(loader);
3113 }
3114 }
3115 return loader;
3116 }
3117
3118
3119 // Support for java_lang_System
3120 int java_lang_System::in_offset_in_bytes() {
3121 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3122 }
3123
3124
3125 int java_lang_System::out_offset_in_bytes() {
3126 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3127 }
3128
3129
3130 int java_lang_System::err_offset_in_bytes() {
3131 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3132 }
3133
3134
3135 bool java_lang_System::has_security_manager() {
3136 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass());
3137 address addr = ik->static_field_addr(static_security_offset);
3138 if (UseCompressedOops) {
3139 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3140 } else {
3141 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3142 }
3143 }
3144
3145 int java_lang_Class::_klass_offset;
3146 int java_lang_Class::_array_klass_offset;
3147 int java_lang_Class::_oop_size_offset;
3148 int java_lang_Class::_static_oop_field_count_offset;
3149 int java_lang_Class::_class_loader_offset;
3150 int java_lang_Class::_protection_domain_offset;
3151 int java_lang_Class::_init_lock_offset;
3152 int java_lang_Class::_signers_offset;
3153 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3154 int java_lang_Throwable::backtrace_offset;
3155 int java_lang_Throwable::detailMessage_offset;
3156 int java_lang_Throwable::cause_offset;
3157 int java_lang_Throwable::stackTrace_offset;
3158 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3159 int java_lang_reflect_AccessibleObject::override_offset;
3160 int java_lang_reflect_Method::clazz_offset;
3161 int java_lang_reflect_Method::name_offset;
3162 int java_lang_reflect_Method::returnType_offset;
3163 int java_lang_reflect_Method::parameterTypes_offset;
3164 int java_lang_reflect_Method::exceptionTypes_offset;
3165 int java_lang_reflect_Method::slot_offset;
3166 int java_lang_reflect_Method::modifiers_offset;
3167 int java_lang_reflect_Method::signature_offset;
3168 int java_lang_reflect_Method::annotations_offset;
3169 int java_lang_reflect_Method::parameter_annotations_offset;
3170 int java_lang_reflect_Method::annotation_default_offset;
3171 int java_lang_reflect_Method::type_annotations_offset;
3172 int java_lang_reflect_Constructor::clazz_offset;
3173 int java_lang_reflect_Constructor::parameterTypes_offset;
3174 int java_lang_reflect_Constructor::exceptionTypes_offset;
3175 int java_lang_reflect_Constructor::slot_offset;
3176 int java_lang_reflect_Constructor::modifiers_offset;
3177 int java_lang_reflect_Constructor::signature_offset;
3178 int java_lang_reflect_Constructor::annotations_offset;
3179 int java_lang_reflect_Constructor::parameter_annotations_offset;
3180 int java_lang_reflect_Constructor::type_annotations_offset;
3181 int java_lang_reflect_Field::clazz_offset;
3182 int java_lang_reflect_Field::name_offset;
3183 int java_lang_reflect_Field::type_offset;
3184 int java_lang_reflect_Field::slot_offset;
3185 int java_lang_reflect_Field::modifiers_offset;
3186 int java_lang_reflect_Field::signature_offset;
3187 int java_lang_reflect_Field::annotations_offset;
3188 int java_lang_reflect_Field::type_annotations_offset;
3189 int java_lang_reflect_Parameter::name_offset;
3190 int java_lang_reflect_Parameter::modifiers_offset;
3191 int java_lang_reflect_Parameter::index_offset;
3192 int java_lang_reflect_Parameter::executable_offset;
3193 int java_lang_boxing_object::value_offset;
3194 int java_lang_boxing_object::long_value_offset;
3195 int java_lang_ref_Reference::referent_offset;
3196 int java_lang_ref_Reference::queue_offset;
3197 int java_lang_ref_Reference::next_offset;
3198 int java_lang_ref_Reference::discovered_offset;
3199 int java_lang_ref_Reference::static_lock_offset;
3200 int java_lang_ref_Reference::static_pending_offset;
3201 int java_lang_ref_Reference::number_of_fake_oop_fields;
3202 int java_lang_ref_SoftReference::timestamp_offset;
3203 int java_lang_ref_SoftReference::static_clock_offset;
3204 int java_lang_ClassLoader::parent_offset;
3205 int java_lang_System::static_in_offset;
3206 int java_lang_System::static_out_offset;
3207 int java_lang_System::static_err_offset;
3208 int java_lang_System::static_security_offset;
3209 int java_lang_StackTraceElement::declaringClass_offset;
3210 int java_lang_StackTraceElement::methodName_offset;
3211 int java_lang_StackTraceElement::fileName_offset;
3212 int java_lang_StackTraceElement::lineNumber_offset;
3213 int java_lang_AssertionStatusDirectives::classes_offset;
3214 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3215 int java_lang_AssertionStatusDirectives::packages_offset;
3216 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3217 int java_lang_AssertionStatusDirectives::deflt_offset;
3218 int java_nio_Buffer::_limit_offset;
3219 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3220 int sun_reflect_ConstantPool::_oop_offset;
3221 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3222
3223
3224 // Support for java_lang_StackTraceElement
3225
3226 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3227 element->obj_field_put(fileName_offset, value);
3228 }
3229
3230 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3231 element->obj_field_put(declaringClass_offset, value);
3232 }
3233
3234 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3235 element->obj_field_put(methodName_offset, value);
3236 }
3237
3238 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3239 element->int_field_put(lineNumber_offset, value);
3240 }
3241
3242
3243 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3244
3245 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3246 o->obj_field_put(classes_offset, val);
3247 }
3248
3249 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3250 o->obj_field_put(classEnabled_offset, val);
3251 }
3252
3253 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3254 o->obj_field_put(packages_offset, val);
3255 }
3256
3257 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3258 o->obj_field_put(packageEnabled_offset, val);
3259 }
3260
3261 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3262 o->bool_field_put(deflt_offset, val);
3263 }
3264
3265
3266 // Support for intrinsification of java.nio.Buffer.checkIndex
3267 int java_nio_Buffer::limit_offset() {
3268 return _limit_offset;
3269 }
3270
3271
3272 void java_nio_Buffer::compute_offsets() {
3273 Klass* k = SystemDictionary::nio_Buffer_klass();
3274 assert(k != NULL, "must be loaded in 1.4+");
3275 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3276 }
3277
3278 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3279 if (_owner_offset != 0) return;
3280
3281 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
3282 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3283 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3284 compute_offset(_owner_offset, k,
3285 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3286 }
3287
3288 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3289 assert(_owner_offset != 0, "Must be initialized");
3290 return obj->obj_field(_owner_offset);
3291 }
3292
3293 // Compute hard-coded offsets
3294 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3295 // are not available to determine the offset_of_static_fields.
3296 void JavaClasses::compute_hard_coded_offsets() {
3297 const int x = heapOopSize;
3298 const int header = instanceOopDesc::base_offset_in_bytes();
3299
3300 // Throwable Class
3301 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
3302 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3303 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
3304 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3305 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x;
3306
3307 // java_lang_boxing_object
3308 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3309 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3310
3311 // java_lang_ref_Reference:
3312 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3313 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3314 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
3315 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
3316 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
3317 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3318 // Artificial fields for java_lang_ref_Reference
3319 // The first field is for the discovered field added in 1.4
3320 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3321
3322 // java_lang_ref_SoftReference Class
3323 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3324 // Don't multiply static fields because they are always in wordSize units
3325 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3326
3327 // java_lang_ClassLoader
3328 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3329
3330 // java_lang_System
3331 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
3332 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3333 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3334 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3335
3336 // java_lang_StackTraceElement
3337 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
3338 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3339 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
3340 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3341 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3342 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3343 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3344 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3345 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3346
3347 }
3348
3349
3350 // Compute non-hard-coded field offsets of all the classes in this file
3351 void JavaClasses::compute_offsets() {
3352 // java_lang_Class::compute_offsets was called earlier in bootstrap
3353 java_lang_ClassLoader::compute_offsets();
3354 java_lang_Thread::compute_offsets();
3355 java_lang_ThreadGroup::compute_offsets();
3356 if (EnableInvokeDynamic) {
3357 java_lang_invoke_MethodHandle::compute_offsets();
3358 java_lang_invoke_DirectMethodHandle::compute_offsets();
3359 java_lang_invoke_MemberName::compute_offsets();
3360 java_lang_invoke_LambdaForm::compute_offsets();
3361 java_lang_invoke_MethodType::compute_offsets();
3362 java_lang_invoke_CallSite::compute_offsets();
3363 }
3364 java_security_AccessControlContext::compute_offsets();
3365 // Initialize reflection classes. The layouts of these classes
3366 // changed with the new reflection implementation in JDK 1.4, and
3367 // since the Universe doesn't know what JDK version it is until this
3368 // point we defer computation of these offsets until now.
3369 java_lang_reflect_AccessibleObject::compute_offsets();
3370 java_lang_reflect_Method::compute_offsets();
3371 java_lang_reflect_Constructor::compute_offsets();
3372 java_lang_reflect_Field::compute_offsets();
3373 if (JDK_Version::is_gte_jdk14x_version()) {
3374 java_nio_Buffer::compute_offsets();
3375 }
3376 if (JDK_Version::is_gte_jdk15x_version()) {
3377 sun_reflect_ConstantPool::compute_offsets();
3378 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3379 }
3380 if (JDK_Version::is_jdk18x_version())
3381 java_lang_reflect_Parameter::compute_offsets();
3382
3383 // generated interpreter code wants to know about the offsets we just computed:
3384 AbstractAssembler::update_delayed_values();
3385 }
3386
3387 #ifndef PRODUCT
3388
3389 // These functions exist to assert the validity of hard-coded field offsets to guard
3390 // against changes in the class files
3391
3392 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3393 EXCEPTION_MARK;
3394 fieldDescriptor fd;
3395 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3396 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3397 instanceKlassHandle h_klass (THREAD, k);
3398 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3399 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3400 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3401 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3402 return false;
3403 }
3404 if (fd.is_static()) {
3405 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3406 return false;
3407 }
3408 if (fd.offset() == hardcoded_offset ) {
3409 return true;
3410 } else {
3411 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3412 klass_name, field_name, hardcoded_offset, fd.offset());
3413 return false;
3414 }
3415 }
3416
3417
3418 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3419 EXCEPTION_MARK;
3420 fieldDescriptor fd;
3421 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3422 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3423 instanceKlassHandle h_klass (THREAD, k);
3424 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3425 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3426 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3427 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3428 return false;
3429 }
3430 if (!fd.is_static()) {
3431 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3432 return false;
3433 }
3434 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3435 return true;
3436 } else {
3437 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());
3438 return false;
3439 }
3440 }
3441
3442
3443 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3444 EXCEPTION_MARK;
3445 fieldDescriptor fd;
3446 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3447 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3448 instanceKlassHandle h_klass (THREAD, k);
3449 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3450 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3451 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3452 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3453 return false;
3454 }
3455 if (!fd.is_static() || !fd.has_initial_value()) {
3456 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3457 return false;
3458 }
3459 if (!fd.initial_value_tag().is_int()) {
3460 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3461 return false;
3462 }
3463 jint field_value = fd.int_initial_value();
3464 if (field_value == hardcoded_constant) {
3465 return true;
3466 } else {
3467 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);
3468 return false;
3469 }
3470 }
3471
3472
3473 // Check the hard-coded field offsets of all the classes in this file
3474
3475 void JavaClasses::check_offsets() {
3476 bool valid = true;
3477 HandleMark hm;
3478
3479 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3480 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3481
3482 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3483 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3484
3485 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3486 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3487
3488 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3489 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3490
3491 // java.lang.String
3492
3493 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3494 if (java_lang_String::has_offset_field()) {
3495 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3496 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3497 }
3498 if (java_lang_String::has_hash_field()) {
3499 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3500 }
3501
3502 // java.lang.Class
3503
3504 // Fake fields
3505 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3506 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3507
3508 // java.lang.Throwable
3509
3510 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3511 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3512 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3513 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3514
3515 // Boxed primitive objects (java_lang_boxing_object)
3516
3517 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3518 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3519 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3520 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3521 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3522 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3523 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3524 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3525
3526 // java.lang.ClassLoader
3527
3528 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3529
3530 // java.lang.System
3531
3532 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3533 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3534 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3535 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
3536
3537 // java.lang.StackTraceElement
3538
3539 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3540 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3541 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3542 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3543
3544 // java.lang.ref.Reference
3545
3546 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3547 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3548 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3549 // Fake field
3550 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3551 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3552 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3553
3554 // java.lang.ref.SoftReference
3555
3556 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3557 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3558
3559 // java.lang.AssertionStatusDirectives
3560 //
3561 // The CheckAssertionStatusDirectives boolean can be removed from here and
3562 // globals.hpp after the AssertionStatusDirectives class has been integrated
3563 // into merlin "for some time." Without it, the vm will fail with early
3564 // merlin builds.
3565
3566 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) {
3567 const char* nm = "java/lang/AssertionStatusDirectives";
3568 const char* sig = "[Ljava/lang/String;";
3569 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3570 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3571 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3572 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3573 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3574 }
3575
3576 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3577 }
3578
3579 #endif // PRODUCT
3580
3581 int InjectedField::compute_offset() {
3582 Klass* klass_oop = klass();
3583 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3584 if (!may_be_java && !fs.access_flags().is_internal()) {
3585 // Only look at injected fields
3586 continue;
3587 }
3588 if (fs.name() == name() && fs.signature() == signature()) {
3589 return fs.offset();
3590 }
3591 }
3592 ResourceMark rm;
3593 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)" : "");
3594 #ifndef PRODUCT
3595 klass_oop->print();
3596 tty->print_cr("all fields:");
3597 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3598 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
3599 }
3600 #endif //PRODUCT
3601 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class");
3602 return -1;
3603 }
3604
3605 void javaClasses_init() {
3606 JavaClasses::compute_offsets();
3607 JavaClasses::check_offsets();
3608 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3609 }