1 /*
2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/altHashing.hpp"
27 #include "classfile/javaClasses.hpp"
28 #include "classfile/symbolTable.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "code/debugInfo.hpp"
31 #include "code/pcDesc.hpp"
32 #include "compiler/compilerOracle.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "memory/oopFactory.hpp"
35 #include "memory/resourceArea.hpp"
36 #include "memory/universe.inline.hpp"
37 #include "oops/fieldStreams.hpp"
38 #include "oops/instanceKlass.hpp"
39 #include "oops/instanceMirrorKlass.hpp"
40 #include "oops/klass.hpp"
41 #include "oops/method.hpp"
42 #include "oops/symbol.hpp"
43 #include "oops/typeArrayOop.hpp"
44 #include "prims/jvmtiRedefineClassesTrace.hpp"
45 #include "runtime/fieldDescriptor.hpp"
46 #include "runtime/handles.inline.hpp"
47 #include "runtime/interfaceSupport.hpp"
48 #include "runtime/java.hpp"
49 #include "runtime/javaCalls.hpp"
50 #include "runtime/safepoint.hpp"
51 #include "runtime/thread.inline.hpp"
52 #include "runtime/vframe.hpp"
53 #include "utilities/preserveException.hpp"
54
55 #if INCLUDE_ALL_GCS
56 #include "gc_implementation/shenandoah/shenandoahBarrierSet.hpp"
57 #endif
58
59 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
60
61 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
62 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
63
64 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
65 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
66
67 InjectedField JavaClasses::_injected_fields[] = {
68 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
69 };
70
71 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
72 return _injected_fields[id].compute_offset();
73 }
74
75
76 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
77 *field_count = 0;
78
79 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
80 if (sid == vmSymbols::NO_SID) {
81 // Only well known classes can inject fields
82 return NULL;
83 }
84
85 int count = 0;
86 int start = -1;
87
88 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
89 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
90 count++; \
91 if (start == -1) start = klass##_##name##_enum; \
92 }
93 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
94 #undef LOOKUP_INJECTED_FIELD
95
96 if (start != -1) {
97 *field_count = count;
98 return _injected_fields + start;
99 }
100 return NULL;
101 }
102
103
104 static bool find_field(InstanceKlass* ik,
105 Symbol* name_symbol, Symbol* signature_symbol,
106 fieldDescriptor* fd,
107 bool allow_super = false) {
108 if (allow_super)
109 return ik->find_field(name_symbol, signature_symbol, fd) != NULL;
110 else
111 return ik->find_local_field(name_symbol, signature_symbol, fd);
112 }
113
114 // Helpful routine for computing field offsets at run time rather than hardcoding them
115 static void
116 compute_offset(int &dest_offset,
117 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
118 bool allow_super = false) {
119 fieldDescriptor fd;
120 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
121 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
122 ResourceMark rm;
123 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
124 #ifndef PRODUCT
125 klass_oop->print();
126 tty->print_cr("all fields:");
127 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
128 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
129 }
130 #endif //PRODUCT
131 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class");
132 }
133 dest_offset = fd.offset();
134 }
135
136 // Same as above but for "optional" offsets that might not be present in certain JDK versions
137 static void
138 compute_optional_offset(int& dest_offset,
139 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
140 bool allow_super = false) {
141 fieldDescriptor fd;
142 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
143 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
144 dest_offset = fd.offset();
145 }
146 }
147
148
149 int java_lang_String::value_offset = 0;
150 int java_lang_String::offset_offset = 0;
151 int java_lang_String::count_offset = 0;
152 int java_lang_String::hash_offset = 0;
153
154 bool java_lang_String::initialized = false;
155
156 void java_lang_String::compute_offsets() {
157 assert(!initialized, "offsets should be initialized only once");
158
159 Klass* k = SystemDictionary::String_klass();
160 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature());
161 compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature());
162 compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature());
163 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature());
164
165 initialized = true;
166 }
167
168 Handle java_lang_String::basic_create(int length, TRAPS) {
169 assert(initialized, "Must be initialized");
170 // Create the String object first, so there's a chance that the String
171 // and the char array it points to end up in the same cache line.
172 oop obj;
173 obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH);
174
175 // Create the char array. The String object must be handlized here
176 // because GC can happen as a result of the allocation attempt.
177 Handle h_obj(THREAD, obj);
178 typeArrayOop buffer;
179 buffer = oopFactory::new_charArray(length, CHECK_NH);
180
181 // Point the String at the char array
182 obj = h_obj();
183 set_value(obj, buffer);
184 // No need to zero the offset, allocation zero'ed the entire String object
185 assert(offset(obj) == 0, "initial String offset should be zero");
186 //set_offset(obj, 0);
187 set_count(obj, length);
188
189 return h_obj;
190 }
191
192 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
193 Handle h_obj = basic_create(length, CHECK_NH);
194 typeArrayOop buffer = value(h_obj());
195 for (int index = 0; index < length; index++) {
196 buffer->char_at_put(index, unicode[index]);
197 }
198 return h_obj;
199 }
200
201 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
202 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
203 return h_obj();
204 }
205
206 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
207 if (utf8_str == NULL) {
208 return Handle();
209 }
210 int length = UTF8::unicode_length(utf8_str);
211 Handle h_obj = basic_create(length, CHECK_NH);
212 if (length > 0) {
213 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
214 }
215 return h_obj;
216 }
217
218 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
219 Handle h_obj = create_from_str(utf8_str, CHECK_0);
220 return h_obj();
221 }
222
223 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
224 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
225 Handle h_obj = basic_create(length, CHECK_NH);
226 if (length > 0) {
227 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
228 }
229 return h_obj;
230 }
231
232 // Converts a C string to a Java String based on current encoding
233 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
234 assert(str != NULL, "bad arguments");
235
236 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
237 static to_java_string_fn_t _to_java_string_fn = NULL;
238
239 if (_to_java_string_fn == NULL) {
240 void *lib_handle = os::native_java_library();
241 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
242 if (_to_java_string_fn == NULL) {
243 fatal("NewStringPlatform missing");
244 }
245 }
246
247 jstring js = NULL;
248 { JavaThread* thread = (JavaThread*)THREAD;
249 assert(thread->is_Java_thread(), "must be java thread");
250 HandleMark hm(thread);
251 ThreadToNativeFromVM ttn(thread);
252 js = (_to_java_string_fn)(thread->jni_environment(), str);
253 }
254 return Handle(THREAD, JNIHandles::resolve(js));
255 }
256
257 // Converts a Java String to a native C string that can be used for
258 // native OS calls.
259 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
260
261 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
262 static to_platform_string_fn_t _to_platform_string_fn = NULL;
263
264 if (_to_platform_string_fn == NULL) {
265 void *lib_handle = os::native_java_library();
266 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
267 if (_to_platform_string_fn == NULL) {
268 fatal("GetStringPlatformChars missing");
269 }
270 }
271
272 char *native_platform_string;
273 { JavaThread* thread = (JavaThread*)THREAD;
274 assert(thread->is_Java_thread(), "must be java thread");
275 JNIEnv *env = thread->jni_environment();
276 jstring js = (jstring) JNIHandles::make_local(env, java_string());
277 bool is_copy;
278 HandleMark hm(thread);
279 ThreadToNativeFromVM ttn(thread);
280 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
281 assert(is_copy == JNI_TRUE, "is_copy value changed");
282 JNIHandles::destroy_local(js);
283 }
284 return native_platform_string;
285 }
286
287 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
288 oop obj = java_string();
289 // Typical usage is to convert all '/' to '.' in string.
290 typeArrayOop value = java_lang_String::value(obj);
291 int offset = java_lang_String::offset(obj);
292 int length = java_lang_String::length(obj);
293
294 // First check if any from_char exist
295 int index; // Declared outside, used later
296 for (index = 0; index < length; index++) {
297 if (value->char_at(index + offset) == from_char) {
298 break;
299 }
300 }
301 if (index == length) {
302 // No from_char, so do not copy.
303 return java_string;
304 }
305
306 // Create new UNICODE buffer. Must handlize value because GC
307 // may happen during String and char array creation.
308 typeArrayHandle h_value(THREAD, value);
309 Handle string = basic_create(length, CHECK_NH);
310
311 typeArrayOop from_buffer = h_value();
312 typeArrayOop to_buffer = java_lang_String::value(string());
313
314 // Copy contents
315 for (index = 0; index < length; index++) {
316 jchar c = from_buffer->char_at(index + offset);
317 if (c == from_char) {
318 c = to_char;
319 }
320 to_buffer->char_at_put(index, c);
321 }
322 return string;
323 }
324
325 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
326 typeArrayOop value = java_lang_String::value(java_string);
327 int offset = java_lang_String::offset(java_string);
328 length = java_lang_String::length(java_string);
329
330 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
331 if (result != NULL) {
332 for (int index = 0; index < length; index++) {
333 result[index] = value->char_at(index + offset);
334 }
335 } else {
336 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
337 }
338 return result;
339 }
340
341 unsigned int java_lang_String::hash_code(oop java_string) {
342 int length = java_lang_String::length(java_string);
343 // Zero length string will hash to zero with String.hashCode() function.
344 if (length == 0) return 0;
345
346 typeArrayOop value = java_lang_String::value(java_string);
347 int offset = java_lang_String::offset(java_string);
348 return java_lang_String::hash_code(value->char_at_addr(offset), length);
349 }
350
351 char* java_lang_String::as_quoted_ascii(oop java_string) {
352 typeArrayOop value = java_lang_String::value(java_string);
353 int offset = java_lang_String::offset(java_string);
354 int length = java_lang_String::length(java_string);
355
356 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
357 if (base == NULL) return NULL;
358
359 int result_length = UNICODE::quoted_ascii_length(base, length) + 1;
360 char* result = NEW_RESOURCE_ARRAY(char, result_length);
361 UNICODE::as_quoted_ascii(base, length, result, result_length);
362 assert(result_length >= length + 1, "must not be shorter");
363 assert(result_length == (int)strlen(result) + 1, "must match");
364 return result;
365 }
366
367 unsigned int java_lang_String::hash_string(oop java_string) {
368 int length = java_lang_String::length(java_string);
369 // Zero length string doesn't hash necessarily hash to zero.
370 if (length == 0) {
371 return StringTable::hash_string(NULL, 0);
372 }
373
374 typeArrayOop value = java_lang_String::value(java_string);
375 int offset = java_lang_String::offset(java_string);
376 return StringTable::hash_string(value->char_at_addr(offset), length);
377 }
378
379 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {
380 oop obj = java_string();
381 typeArrayOop value = java_lang_String::value(obj);
382 int offset = java_lang_String::offset(obj);
383 int length = java_lang_String::length(obj);
384 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
385 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
386 return sym;
387 }
388
389 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
390 typeArrayOop value = java_lang_String::value(java_string);
391 int offset = java_lang_String::offset(java_string);
392 int length = java_lang_String::length(java_string);
393 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
394 return SymbolTable::probe_unicode(base, length);
395 }
396
397
398 int java_lang_String::utf8_length(oop java_string) {
399 typeArrayOop value = java_lang_String::value(java_string);
400 int offset = java_lang_String::offset(java_string);
401 int length = java_lang_String::length(java_string);
402 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
403 return UNICODE::utf8_length(position, length);
404 }
405
406 char* java_lang_String::as_utf8_string(oop java_string) {
407 typeArrayOop value = java_lang_String::value(java_string);
408 int offset = java_lang_String::offset(java_string);
409 int length = java_lang_String::length(java_string);
410 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
411 return UNICODE::as_utf8(position, length);
412 }
413
414 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
415 typeArrayOop value = java_lang_String::value(java_string);
416 int offset = java_lang_String::offset(java_string);
417 int length = java_lang_String::length(java_string);
418 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
419 return UNICODE::as_utf8(position, length, buf, buflen);
420 }
421
422 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
423 typeArrayOop value = java_lang_String::value(java_string);
424 int offset = java_lang_String::offset(java_string);
425 int length = java_lang_String::length(java_string);
426 assert(start + len <= length, "just checking");
427 jchar* position = value->char_at_addr(offset + start);
428 return UNICODE::as_utf8(position, len);
429 }
430
431 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
432 assert(java_string->klass() == SystemDictionary::String_klass(),
433 "must be java_string");
434 typeArrayOop value = java_lang_String::value(java_string);
435 int offset = java_lang_String::offset(java_string);
436 int length = java_lang_String::length(java_string);
437 if (length != len) {
438 return false;
439 }
440 for (int i = 0; i < len; i++) {
441 if (value->char_at(i + offset) != chars[i]) {
442 return false;
443 }
444 }
445 return true;
446 }
447
448 bool java_lang_String::equals(oop str1, oop str2) {
449 assert(str1->klass() == SystemDictionary::String_klass(),
450 "must be java String");
451 assert(str2->klass() == SystemDictionary::String_klass(),
452 "must be java String");
453 typeArrayOop value1 = java_lang_String::value(str1);
454 int offset1 = java_lang_String::offset(str1);
455 int length1 = java_lang_String::length(str1);
456 typeArrayOop value2 = java_lang_String::value(str2);
457 int offset2 = java_lang_String::offset(str2);
458 int length2 = java_lang_String::length(str2);
459
460 if (length1 != length2) {
461 return false;
462 }
463 for (int i = 0; i < length1; i++) {
464 if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) {
465 return false;
466 }
467 }
468 return true;
469 }
470
471 void java_lang_String::print(oop java_string, outputStream* st) {
472 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
473 typeArrayOop value = java_lang_String::value(java_string);
474 int offset = java_lang_String::offset(java_string);
475 int length = java_lang_String::length(java_string);
476
477 int end = MIN2(length, 100);
478 if (value == NULL) {
479 // This can happen if, e.g., printing a String
480 // object before its initializer has been called
481 st->print_cr("NULL");
482 } else {
483 st->print("\"");
484 for (int index = 0; index < length; index++) {
485 st->print("%c", value->char_at(index + offset));
486 }
487 st->print("\"");
488 }
489 }
490
491
492 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
493 assert(mirror.not_null() && fd->is_static(), "just checking");
494 if (fd->has_initial_value()) {
495 BasicType t = fd->field_type();
496 switch (t) {
497 case T_BYTE:
498 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
499 break;
500 case T_BOOLEAN:
501 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
502 break;
503 case T_CHAR:
504 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
505 break;
506 case T_SHORT:
507 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
508 break;
509 case T_INT:
510 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
511 break;
512 case T_FLOAT:
513 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
514 break;
515 case T_DOUBLE:
516 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
517 break;
518 case T_LONG:
519 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
520 break;
521 case T_OBJECT:
522 {
523 #ifdef ASSERT
524 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
525 assert(fd->signature() == sym, "just checking");
526 #endif
527 oop string = fd->string_initial_value(CHECK);
528 mirror()->obj_field_put(fd->offset(), string);
529 }
530 break;
531 default:
532 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
533 "Illegal ConstantValue attribute in class file");
534 }
535 }
536 }
537
538
539 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) {
540 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
541
542 // If the offset was read from the shared archive, it was fixed up already
543 if (!k->is_shared()) {
544 if (k->oop_is_instance()) {
545 // During bootstrap, java.lang.Class wasn't loaded so static field
546 // offsets were computed without the size added it. Go back and
547 // update all the static field offsets to included the size.
548 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) {
549 if (fs.access_flags().is_static()) {
550 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
551 fs.set_offset(real_offset);
552 }
553 }
554 }
555 }
556 create_mirror(k, Handle(NULL), Handle(NULL), CHECK);
557 }
558
559 void java_lang_Class::initialize_mirror_fields(KlassHandle k,
560 Handle mirror,
561 Handle protection_domain,
562 TRAPS) {
563 // Allocate a simple java object for a lock.
564 // This needs to be a java object because during class initialization
565 // it can be held across a java call.
566 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
567 set_init_lock(mirror(), r);
568
569 // Set protection domain also
570 set_protection_domain(mirror(), protection_domain());
571
572 // Initialize static fields
573 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK);
574 }
575
576 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader,
577 Handle protection_domain, TRAPS) {
578 assert(k->java_mirror() == NULL, "should only assign mirror once");
579 // Use this moment of initialization to cache modifier_flags also,
580 // to support Class.getModifiers(). Instance classes recalculate
581 // the cached flags after the class file is parsed, but before the
582 // class is put into the system dictionary.
583 int computed_modifiers = k->compute_modifier_flags(CHECK);
584 k->set_modifier_flags(computed_modifiers);
585 // Class_klass has to be loaded because it is used to allocate
586 // the mirror.
587 if (SystemDictionary::Class_klass_loaded()) {
588 // Allocate mirror (java.lang.Class instance)
589 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
590
591 // Setup indirection from mirror->klass
592 if (!k.is_null()) {
593 java_lang_Class::set_klass(mirror(), k());
594 }
595
596 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
597 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
598
599 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
600
601 // It might also have a component mirror. This mirror must already exist.
602 if (k->oop_is_array()) {
603 Handle comp_mirror;
604 if (k->oop_is_typeArray()) {
605 BasicType type = TypeArrayKlass::cast(k())->element_type();
606 comp_mirror = Universe::java_mirror(type);
607 } else {
608 assert(k->oop_is_objArray(), "Must be");
609 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass();
610 assert(element_klass != NULL, "Must have an element klass");
611 comp_mirror = element_klass->java_mirror();
612 }
613 assert(comp_mirror.not_null(), "must have a mirror");
614
615 // Two-way link between the array klass and its component mirror:
616 ArrayKlass::cast(k())->set_component_mirror(comp_mirror());
617 set_array_klass(comp_mirror(), k());
618 } else {
619 assert(k->oop_is_instance(), "Must be");
620
621 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
622 if (HAS_PENDING_EXCEPTION) {
623 // If any of the fields throws an exception like OOM remove the klass field
624 // from the mirror so GC doesn't follow it after the klass has been deallocated.
625 // This mirror looks like a primitive type, which logically it is because it
626 // it represents no class.
627 java_lang_Class::set_klass(mirror(), NULL);
628 return;
629 }
630 }
631
632 // set the classLoader field in the java_lang_Class instance
633 assert(class_loader() == k->class_loader(), "should be same");
634 set_class_loader(mirror(), class_loader());
635
636 // Setup indirection from klass->mirror last
637 // after any exceptions can happen during allocations.
638 if (!k.is_null()) {
639 k->set_java_mirror(mirror());
640 }
641 } else {
642 if (fixup_mirror_list() == NULL) {
643 GrowableArray<Klass*>* list =
644 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
645 set_fixup_mirror_list(list);
646 }
647 fixup_mirror_list()->push(k());
648 }
649 }
650
651
652 int java_lang_Class::oop_size(oop java_class) {
653 assert(_oop_size_offset != 0, "must be set");
654 return java_class->int_field(_oop_size_offset);
655 }
656 void java_lang_Class::set_oop_size(oop java_class, int size) {
657 assert(_oop_size_offset != 0, "must be set");
658 java_class->int_field_put(_oop_size_offset, size);
659 }
660 int java_lang_Class::static_oop_field_count(oop java_class) {
661 assert(_static_oop_field_count_offset != 0, "must be set");
662 return java_class->int_field(_static_oop_field_count_offset);
663 }
664 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
665 assert(_static_oop_field_count_offset != 0, "must be set");
666 java_class->int_field_put(_static_oop_field_count_offset, size);
667 }
668
669 oop java_lang_Class::protection_domain(oop java_class) {
670 assert(_protection_domain_offset != 0, "must be set");
671 return java_class->obj_field(_protection_domain_offset);
672 }
673 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
674 assert(_protection_domain_offset != 0, "must be set");
675 java_class->obj_field_put(_protection_domain_offset, pd);
676 }
677
678 oop java_lang_Class::init_lock(oop java_class) {
679 assert(_init_lock_offset != 0, "must be set");
680 return java_class->obj_field(_init_lock_offset);
681 }
682 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
683 assert(_init_lock_offset != 0, "must be set");
684 java_class->obj_field_put(_init_lock_offset, init_lock);
685 }
686
687 objArrayOop java_lang_Class::signers(oop java_class) {
688 assert(_signers_offset != 0, "must be set");
689 return (objArrayOop)java_class->obj_field(_signers_offset);
690 }
691 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
692 assert(_signers_offset != 0, "must be set");
693 java_class->obj_field_put(_signers_offset, (oop)signers);
694 }
695
696
697 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
698 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
699 if (_class_loader_offset != 0) {
700 java_class->obj_field_put(_class_loader_offset, loader);
701 }
702 }
703
704 oop java_lang_Class::class_loader(oop java_class) {
705 assert(_class_loader_offset != 0, "must be set");
706 return java_class->obj_field(_class_loader_offset);
707 }
708
709 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
710 // This should be improved by adding a field at the Java level or by
711 // introducing a new VM klass (see comment in ClassFileParser)
712 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
713 if (type != T_VOID) {
714 Klass* aklass = Universe::typeArrayKlassObj(type);
715 assert(aklass != NULL, "correct bootstrap");
716 set_array_klass(java_class, aklass);
717 }
718 #ifdef ASSERT
719 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
720 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
721 #endif
722 return java_class;
723 }
724
725
726 Klass* java_lang_Class::as_Klass(oop java_class) {
727 //%note memory_2
728 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
729 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
730 assert(k == NULL || k->is_klass(), "type check");
731 return k;
732 }
733
734
735 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
736 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
737 java_class->metadata_field_put(_klass_offset, klass);
738 }
739
740
741 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
742 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
743 Symbol* name = NULL;
744 bool is_instance = false;
745 if (is_primitive(java_class)) {
746 name = vmSymbols::type_signature(primitive_type(java_class));
747 } else {
748 Klass* k = as_Klass(java_class);
749 is_instance = k->oop_is_instance();
750 name = k->name();
751 }
752 if (name == NULL) {
753 st->print("<null>");
754 return;
755 }
756 if (is_instance) st->print("L");
757 st->write((char*) name->base(), (int) name->utf8_length());
758 if (is_instance) st->print(";");
759 }
760
761 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
762 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
763 Symbol* name;
764 if (is_primitive(java_class)) {
765 name = vmSymbols::type_signature(primitive_type(java_class));
766 // Because this can create a new symbol, the caller has to decrement
767 // the refcount, so make adjustment here and below for symbols returned
768 // that are not created or incremented due to a successful lookup.
769 name->increment_refcount();
770 } else {
771 Klass* k = as_Klass(java_class);
772 if (!k->oop_is_instance()) {
773 name = k->name();
774 name->increment_refcount();
775 } else {
776 ResourceMark rm;
777 const char* sigstr = k->signature_name();
778 int siglen = (int) strlen(sigstr);
779 if (!intern_if_not_found) {
780 name = SymbolTable::probe(sigstr, siglen);
781 } else {
782 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
783 }
784 }
785 }
786 return name;
787 }
788
789 // Returns the Java name for this Java mirror (Resource allocated)
790 // See Klass::external_name().
791 // For primitive type Java mirrors, its type name is returned.
792 const char* java_lang_Class::as_external_name(oop java_class) {
793 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
794 const char* name = NULL;
795 if (is_primitive(java_class)) {
796 name = type2name(primitive_type(java_class));
797 } else {
798 name = as_Klass(java_class)->external_name();
799 }
800 if (name == NULL) {
801 name = "<null>";
802 }
803 return name;
804 }
805
806 Klass* java_lang_Class::array_klass(oop java_class) {
807 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
808 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass");
809 return k;
810 }
811
812
813 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
814 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass");
815 java_class->metadata_field_put(_array_klass_offset, klass);
816 }
817
818
819 bool java_lang_Class::is_primitive(oop java_class) {
820 // should assert:
821 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
822 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
823
824 #ifdef ASSERT
825 if (is_primitive) {
826 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
827 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
828 "Should be either the T_VOID primitive or a java primitive");
829 }
830 #endif
831
832 return is_primitive;
833 }
834
835
836 BasicType java_lang_Class::primitive_type(oop java_class) {
837 assert(java_lang_Class::is_primitive(java_class), "just checking");
838 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
839 BasicType type = T_VOID;
840 if (ak != NULL) {
841 // Note: create_basic_type_mirror above initializes ak to a non-null value.
842 type = ArrayKlass::cast(ak)->element_type();
843 } else {
844 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
845 }
846 assert(Universe::java_mirror(type) == java_class, "must be consistent");
847 return type;
848 }
849
850 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
851 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
852 if (is_primitive(java_class)) {
853 if (reference_klass != NULL)
854 (*reference_klass) = NULL;
855 return primitive_type(java_class);
856 } else {
857 if (reference_klass != NULL)
858 (*reference_klass) = as_Klass(java_class);
859 return T_OBJECT;
860 }
861 }
862
863
864 oop java_lang_Class::primitive_mirror(BasicType t) {
865 oop mirror = Universe::java_mirror(t);
866 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
867 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
868 return mirror;
869 }
870
871 bool java_lang_Class::offsets_computed = false;
872 int java_lang_Class::classRedefinedCount_offset = -1;
873
874 void java_lang_Class::compute_offsets() {
875 assert(!offsets_computed, "offsets should be initialized only once");
876 offsets_computed = true;
877
878 Klass* klass_oop = SystemDictionary::Class_klass();
879 // The classRedefinedCount field is only present starting in 1.5,
880 // so don't go fatal.
881 compute_optional_offset(classRedefinedCount_offset,
882 klass_oop, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
883
884 // Needs to be optional because the old build runs Queens during bootstrapping
885 // and jdk8-9 doesn't have coordinated pushes yet.
886 compute_optional_offset(_class_loader_offset,
887 klass_oop, vmSymbols::classLoader_name(),
888 vmSymbols::classloader_signature());
889
890 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
891 }
892
893 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
894 if (!JDK_Version::is_gte_jdk15x_version()
895 || classRedefinedCount_offset == -1) {
896 // The classRedefinedCount field is only present starting in 1.5.
897 // If we don't have an offset for it then just return -1 as a marker.
898 return -1;
899 }
900
901 return the_class_mirror->int_field(classRedefinedCount_offset);
902 }
903
904 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
905 if (!JDK_Version::is_gte_jdk15x_version()
906 || classRedefinedCount_offset == -1) {
907 // The classRedefinedCount field is only present starting in 1.5.
908 // If we don't have an offset for it then nothing to set.
909 return;
910 }
911
912 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
913 }
914
915
916 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
917 // platform thread structure, and a eetop offset which was used for thread
918 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
919 // merged, so in the HotSpot VM we just use the eetop field for the thread
920 // instead of the privateInfo_offset.
921 //
922 // Note: The stackSize field is only present starting in 1.4.
923
924 int java_lang_Thread::_name_offset = 0;
925 int java_lang_Thread::_group_offset = 0;
926 int java_lang_Thread::_contextClassLoader_offset = 0;
927 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
928 int java_lang_Thread::_priority_offset = 0;
929 int java_lang_Thread::_eetop_offset = 0;
930 int java_lang_Thread::_daemon_offset = 0;
931 int java_lang_Thread::_stillborn_offset = 0;
932 int java_lang_Thread::_stackSize_offset = 0;
933 int java_lang_Thread::_tid_offset = 0;
934 int java_lang_Thread::_thread_status_offset = 0;
935 int java_lang_Thread::_park_blocker_offset = 0;
936 int java_lang_Thread::_park_event_offset = 0 ;
937
938
939 void java_lang_Thread::compute_offsets() {
940 assert(_group_offset == 0, "offsets should be initialized only once");
941
942 Klass* k = SystemDictionary::Thread_klass();
943 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
944 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
945 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
946 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
947 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
948 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
949 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
950 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
951 // The stackSize field is only present starting in 1.4, so don't go fatal.
952 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
953 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
954 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
955 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
956 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
957 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
958 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
959 vmSymbols::long_signature());
960 }
961
962
963 JavaThread* java_lang_Thread::thread(oop java_thread) {
964 return (JavaThread*)java_thread->address_field(_eetop_offset);
965 }
966
967
968 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
969 java_thread->address_field_put(_eetop_offset, (address)thread);
970 }
971
972
973 oop java_lang_Thread::name(oop java_thread) {
974 return java_thread->obj_field(_name_offset);
975 }
976
977
978 void java_lang_Thread::set_name(oop java_thread, oop name) {
979 java_thread->obj_field_put(_name_offset, name);
980 }
981
982
983 ThreadPriority java_lang_Thread::priority(oop java_thread) {
984 return (ThreadPriority)java_thread->int_field(_priority_offset);
985 }
986
987
988 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
989 java_thread->int_field_put(_priority_offset, priority);
990 }
991
992
993 oop java_lang_Thread::threadGroup(oop java_thread) {
994 return java_thread->obj_field(_group_offset);
995 }
996
997
998 bool java_lang_Thread::is_stillborn(oop java_thread) {
999 return java_thread->bool_field(_stillborn_offset) != 0;
1000 }
1001
1002
1003 // We never have reason to turn the stillborn bit off
1004 void java_lang_Thread::set_stillborn(oop java_thread) {
1005 java_thread->bool_field_put(_stillborn_offset, true);
1006 }
1007
1008
1009 bool java_lang_Thread::is_alive(oop java_thread) {
1010 JavaThread* thr = java_lang_Thread::thread(java_thread);
1011 return (thr != NULL);
1012 }
1013
1014
1015 bool java_lang_Thread::is_daemon(oop java_thread) {
1016 return java_thread->bool_field(_daemon_offset) != 0;
1017 }
1018
1019
1020 void java_lang_Thread::set_daemon(oop java_thread) {
1021 java_thread->bool_field_put(_daemon_offset, true);
1022 }
1023
1024 oop java_lang_Thread::context_class_loader(oop java_thread) {
1025 return java_thread->obj_field(_contextClassLoader_offset);
1026 }
1027
1028 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1029 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1030 }
1031
1032
1033 jlong java_lang_Thread::stackSize(oop java_thread) {
1034 // The stackSize field is only present starting in 1.4
1035 if (_stackSize_offset > 0) {
1036 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check");
1037 return java_thread->long_field(_stackSize_offset);
1038 } else {
1039 return 0;
1040 }
1041 }
1042
1043 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1044 void java_lang_Thread::set_thread_status(oop java_thread,
1045 java_lang_Thread::ThreadStatus status) {
1046 // The threadStatus is only present starting in 1.5
1047 if (_thread_status_offset > 0) {
1048 java_thread->int_field_put(_thread_status_offset, status);
1049 }
1050 }
1051
1052 // Read thread status value from threadStatus field in java.lang.Thread java class.
1053 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1054 assert(Threads_lock->owned_by_self() || Thread::current()->is_Watcher_thread() ||
1055 Thread::current()->is_VM_thread() ||
1056 JavaThread::current()->thread_state() == _thread_in_vm,
1057 "Java Thread is not running in vm");
1058 // The threadStatus is only present starting in 1.5
1059 if (_thread_status_offset > 0) {
1060 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1061 } else {
1062 // All we can easily figure out is if it is alive, but that is
1063 // enough info for a valid unknown status.
1064 // These aren't restricted to valid set ThreadStatus values, so
1065 // use JVMTI values and cast.
1066 JavaThread* thr = java_lang_Thread::thread(java_thread);
1067 if (thr == NULL) {
1068 // the thread hasn't run yet or is in the process of exiting
1069 return NEW;
1070 }
1071 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1072 }
1073 }
1074
1075
1076 jlong java_lang_Thread::thread_id(oop java_thread) {
1077 // The thread ID field is only present starting in 1.5
1078 if (_tid_offset > 0) {
1079 return java_thread->long_field(_tid_offset);
1080 } else {
1081 return 0;
1082 }
1083 }
1084
1085 oop java_lang_Thread::park_blocker(oop java_thread) {
1086 assert(JDK_Version::current().supports_thread_park_blocker() &&
1087 _park_blocker_offset != 0, "Must support parkBlocker field");
1088
1089 if (_park_blocker_offset > 0) {
1090 return java_thread->obj_field(_park_blocker_offset);
1091 }
1092
1093 return NULL;
1094 }
1095
1096 jlong java_lang_Thread::park_event(oop java_thread) {
1097 if (_park_event_offset > 0) {
1098 return java_thread->long_field(_park_event_offset);
1099 }
1100 return 0;
1101 }
1102
1103 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1104 if (_park_event_offset > 0) {
1105 java_thread->long_field_put(_park_event_offset, ptr);
1106 return true;
1107 }
1108 return false;
1109 }
1110
1111
1112 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1113 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status");
1114 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1115 switch (status) {
1116 case NEW : return "NEW";
1117 case RUNNABLE : return "RUNNABLE";
1118 case SLEEPING : return "TIMED_WAITING (sleeping)";
1119 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1120 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1121 case PARKED : return "WAITING (parking)";
1122 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1123 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1124 case TERMINATED : return "TERMINATED";
1125 default : return "UNKNOWN";
1126 };
1127 }
1128 int java_lang_ThreadGroup::_parent_offset = 0;
1129 int java_lang_ThreadGroup::_name_offset = 0;
1130 int java_lang_ThreadGroup::_threads_offset = 0;
1131 int java_lang_ThreadGroup::_groups_offset = 0;
1132 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1133 int java_lang_ThreadGroup::_destroyed_offset = 0;
1134 int java_lang_ThreadGroup::_daemon_offset = 0;
1135 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
1136 int java_lang_ThreadGroup::_nthreads_offset = 0;
1137 int java_lang_ThreadGroup::_ngroups_offset = 0;
1138
1139 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1140 assert(java_thread_group->is_oop(), "thread group must be oop");
1141 return java_thread_group->obj_field(_parent_offset);
1142 }
1143
1144 // ("name as oop" accessor is not necessary)
1145
1146 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
1147 oop name = java_thread_group->obj_field(_name_offset);
1148 // ThreadGroup.name can be null
1149 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
1150 }
1151
1152 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1153 assert(java_thread_group->is_oop(), "thread group must be oop");
1154 return java_thread_group->int_field(_nthreads_offset);
1155 }
1156
1157 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1158 oop threads = java_thread_group->obj_field(_threads_offset);
1159 assert(threads != NULL, "threadgroups should have threads");
1160 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1161 return objArrayOop(threads);
1162 }
1163
1164 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1165 assert(java_thread_group->is_oop(), "thread group must be oop");
1166 return java_thread_group->int_field(_ngroups_offset);
1167 }
1168
1169 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1170 oop groups = java_thread_group->obj_field(_groups_offset);
1171 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1172 return objArrayOop(groups);
1173 }
1174
1175 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1176 assert(java_thread_group->is_oop(), "thread group must be oop");
1177 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1178 }
1179
1180 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1181 assert(java_thread_group->is_oop(), "thread group must be oop");
1182 return java_thread_group->bool_field(_destroyed_offset) != 0;
1183 }
1184
1185 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1186 assert(java_thread_group->is_oop(), "thread group must be oop");
1187 return java_thread_group->bool_field(_daemon_offset) != 0;
1188 }
1189
1190 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1191 assert(java_thread_group->is_oop(), "thread group must be oop");
1192 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1193 }
1194
1195 void java_lang_ThreadGroup::compute_offsets() {
1196 assert(_parent_offset == 0, "offsets should be initialized only once");
1197
1198 Klass* k = SystemDictionary::ThreadGroup_klass();
1199
1200 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1201 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1202 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1203 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1204 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1205 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1206 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1207 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1208 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1209 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1210 }
1211
1212 oop java_lang_Throwable::unassigned_stacktrace() {
1213 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass());
1214 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1215 oop result;
1216 if (UseCompressedOops) {
1217 result = oopDesc::load_decode_heap_oop((narrowOop *)addr);
1218 } else {
1219 result = oopDesc::load_decode_heap_oop((oop*)addr);
1220 }
1221 #if INCLUDE_ALL_GCS
1222 if (UseShenandoahGC) {
1223 result = ShenandoahBarrierSet::barrier_set()->load_reference_barrier(result);
1224 }
1225 #endif
1226 return result;
1227 }
1228
1229 oop java_lang_Throwable::backtrace(oop throwable) {
1230 return throwable->obj_field_acquire(backtrace_offset);
1231 }
1232
1233
1234 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1235 throwable->release_obj_field_put(backtrace_offset, value);
1236 }
1237
1238
1239 oop java_lang_Throwable::message(oop throwable) {
1240 return throwable->obj_field(detailMessage_offset);
1241 }
1242
1243
1244 oop java_lang_Throwable::message(Handle throwable) {
1245 return throwable->obj_field(detailMessage_offset);
1246 }
1247
1248
1249 // Return Symbol for detailed_message or NULL
1250 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1251 PRESERVE_EXCEPTION_MARK; // Keep original exception
1252 oop detailed_message = java_lang_Throwable::message(throwable);
1253 if (detailed_message != NULL) {
1254 return java_lang_String::as_symbol(detailed_message, THREAD);
1255 }
1256 return NULL;
1257 }
1258
1259 void java_lang_Throwable::set_message(oop throwable, oop value) {
1260 throwable->obj_field_put(detailMessage_offset, value);
1261 }
1262
1263
1264 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1265 throwable->obj_field_put(stackTrace_offset, st_element_array);
1266 }
1267
1268 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1269 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1270 set_stacktrace(throwable, NULL);
1271 }
1272
1273
1274 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1275 ResourceMark rm;
1276 Klass* k = throwable->klass();
1277 assert(k != NULL, "just checking");
1278 st->print("%s", InstanceKlass::cast(k)->external_name());
1279 oop msg = message(throwable);
1280 if (msg != NULL) {
1281 st->print(": %s", java_lang_String::as_utf8_string(msg));
1282 }
1283 }
1284
1285
1286 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1287 ResourceMark rm;
1288 Klass* k = throwable->klass();
1289 assert(k != NULL, "just checking");
1290 st->print("%s", InstanceKlass::cast(k)->external_name());
1291 oop msg = message(throwable);
1292 if (msg != NULL) {
1293 st->print(": %s", java_lang_String::as_utf8_string(msg));
1294 }
1295 }
1296
1297 // After this many redefines, the stack trace is unreliable.
1298 const int MAX_VERSION = USHRT_MAX;
1299
1300 // Helper backtrace functions to store bci|version together.
1301 static inline int merge_bci_and_version(int bci, int version) {
1302 // only store u2 for version, checking for overflow.
1303 if (version > USHRT_MAX || version < 0) version = MAX_VERSION;
1304 assert((jushort)bci == bci, "bci should be short");
1305 return build_int_from_shorts(version, bci);
1306 }
1307
1308 static inline int bci_at(unsigned int merged) {
1309 return extract_high_short_from_int(merged);
1310 }
1311 static inline int version_at(unsigned int merged) {
1312 return extract_low_short_from_int(merged);
1313 }
1314
1315 static inline bool version_matches(Method* method, int version) {
1316 assert(version < MAX_VERSION, "version is too big");
1317 return method != NULL && (method->constants()->version() == version);
1318 }
1319
1320 static inline int get_line_number(Method* method, int bci) {
1321 int line_number = 0;
1322 if (method->is_native()) {
1323 // Negative value different from -1 below, enabling Java code in
1324 // class java.lang.StackTraceElement to distinguish "native" from
1325 // "no LineNumberTable". JDK tests for -2.
1326 line_number = -2;
1327 } else {
1328 // Returns -1 if no LineNumberTable, and otherwise actual line number
1329 line_number = method->line_number_from_bci(bci);
1330 if (line_number == -1 && ShowHiddenFrames) {
1331 line_number = bci + 1000000;
1332 }
1333 }
1334 return line_number;
1335 }
1336
1337 // This class provides a simple wrapper over the internal structure of
1338 // exception backtrace to insulate users of the backtrace from needing
1339 // to know what it looks like.
1340 class BacktraceBuilder: public StackObj {
1341 private:
1342 Handle _backtrace;
1343 objArrayOop _head;
1344 typeArrayOop _methods;
1345 typeArrayOop _bcis;
1346 objArrayOop _mirrors;
1347 typeArrayOop _cprefs; // needed to insulate method name against redefinition
1348 int _index;
1349 No_Safepoint_Verifier _nsv;
1350
1351 public:
1352
1353 enum {
1354 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1355 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1356 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1357 trace_cprefs_offset = java_lang_Throwable::trace_cprefs_offset,
1358 trace_next_offset = java_lang_Throwable::trace_next_offset,
1359 trace_size = java_lang_Throwable::trace_size,
1360 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1361 };
1362
1363 // get info out of chunks
1364 static typeArrayOop get_methods(objArrayHandle chunk) {
1365 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1366 assert(methods != NULL, "method array should be initialized in backtrace");
1367 return methods;
1368 }
1369 static typeArrayOop get_bcis(objArrayHandle chunk) {
1370 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1371 assert(bcis != NULL, "bci array should be initialized in backtrace");
1372 return bcis;
1373 }
1374 static objArrayOop get_mirrors(objArrayHandle chunk) {
1375 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1376 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1377 return mirrors;
1378 }
1379 static typeArrayOop get_cprefs(objArrayHandle chunk) {
1380 typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset));
1381 assert(cprefs != NULL, "cprefs array should be initialized in backtrace");
1382 return cprefs;
1383 }
1384
1385 // constructor for new backtrace
1386 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) {
1387 expand(CHECK);
1388 _backtrace = _head;
1389 _index = 0;
1390 }
1391
1392 BacktraceBuilder(objArrayHandle backtrace) {
1393 _methods = get_methods(backtrace);
1394 _bcis = get_bcis(backtrace);
1395 _mirrors = get_mirrors(backtrace);
1396 _cprefs = get_cprefs(backtrace);
1397 assert(_methods->length() == _bcis->length() &&
1398 _methods->length() == _mirrors->length(),
1399 "method and source information arrays should match");
1400
1401 // head is the preallocated backtrace
1402 _backtrace = _head = backtrace();
1403 _index = 0;
1404 }
1405
1406 void expand(TRAPS) {
1407 objArrayHandle old_head(THREAD, _head);
1408 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1409
1410 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1411 objArrayHandle new_head(THREAD, head);
1412
1413 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1414 typeArrayHandle new_methods(THREAD, methods);
1415
1416 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1417 typeArrayHandle new_bcis(THREAD, bcis);
1418
1419 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1420 objArrayHandle new_mirrors(THREAD, mirrors);
1421
1422 typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1423 typeArrayHandle new_cprefs(THREAD, cprefs);
1424
1425 if (!old_head.is_null()) {
1426 old_head->obj_at_put(trace_next_offset, new_head());
1427 }
1428 new_head->obj_at_put(trace_methods_offset, new_methods());
1429 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1430 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1431 new_head->obj_at_put(trace_cprefs_offset, new_cprefs());
1432
1433 _head = new_head();
1434 _methods = new_methods();
1435 _bcis = new_bcis();
1436 _mirrors = new_mirrors();
1437 _cprefs = new_cprefs();
1438 _index = 0;
1439 }
1440
1441 oop backtrace() {
1442 return _backtrace();
1443 }
1444
1445 inline void push(Method* method, int bci, TRAPS) {
1446 // Smear the -1 bci to 0 since the array only holds unsigned
1447 // shorts. The later line number lookup would just smear the -1
1448 // to a 0 even if it could be recorded.
1449 if (bci == SynchronizationEntryBCI) bci = 0;
1450
1451 if (_index >= trace_chunk_size) {
1452 methodHandle mhandle(THREAD, method);
1453 expand(CHECK);
1454 method = mhandle();
1455 }
1456
1457 _methods->short_at_put(_index, method->orig_method_idnum());
1458 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version()));
1459 _cprefs->short_at_put(_index, method->name_index());
1460
1461 // We need to save the mirrors in the backtrace to keep the class
1462 // from being unloaded while we still have this stack trace.
1463 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1464 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1465 _index++;
1466 }
1467
1468 };
1469
1470 // Print stack trace element to resource allocated buffer
1471 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
1472 int method_id, int version, int bci, int cpref) {
1473
1474 // Get strings and string lengths
1475 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1476 const char* klass_name = holder->external_name();
1477 int buf_len = (int)strlen(klass_name);
1478
1479 Method* method = holder->method_with_orig_idnum(method_id, version);
1480
1481 // The method can be NULL if the requested class version is gone
1482 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1483 char* method_name = sym->as_C_string();
1484 buf_len += (int)strlen(method_name);
1485
1486 // Use a specific ik version as a holder since the mirror might
1487 // refer to a version that is now obsolete and no longer accessible
1488 // via the previous versions list.
1489 holder = holder->get_klass_version(version);
1490 char* source_file_name = NULL;
1491 if (holder != NULL) {
1492 Symbol* source = holder->source_file_name();
1493 if (source != NULL) {
1494 source_file_name = source->as_C_string();
1495 buf_len += (int)strlen(source_file_name);
1496 }
1497 }
1498
1499 // Allocate temporary buffer with extra space for formatting and line number
1500 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1501
1502 // Print stack trace line in buffer
1503 sprintf(buf, "\tat %s.%s", klass_name, method_name);
1504
1505 if (!version_matches(method, version)) {
1506 strcat(buf, "(Redefined)");
1507 } else {
1508 int line_number = get_line_number(method, bci);
1509 if (line_number == -2) {
1510 strcat(buf, "(Native Method)");
1511 } else {
1512 if (source_file_name != NULL && (line_number != -1)) {
1513 // Sourcename and linenumber
1514 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1515 } else if (source_file_name != NULL) {
1516 // Just sourcename
1517 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1518 } else {
1519 // Neither sourcename nor linenumber
1520 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1521 }
1522 nmethod* nm = method->code();
1523 if (WizardMode && nm != NULL) {
1524 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1525 }
1526 }
1527 }
1528
1529 return buf;
1530 }
1531
1532 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror,
1533 int method_id, int version, int bci, int cpref) {
1534 ResourceMark rm;
1535 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci, cpref);
1536 st->print_cr("%s", buf);
1537 }
1538
1539 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) {
1540 Handle mirror = method->method_holder()->java_mirror();
1541 int method_id = method->orig_method_idnum();
1542 int version = method->constants()->version();
1543 int cpref = method->name_index();
1544 print_stack_element(st, mirror, method_id, version, bci, cpref);
1545 }
1546
1547 const char* java_lang_Throwable::no_stack_trace_message() {
1548 return "\t<<no stack trace available>>";
1549 }
1550
1551
1552 // Currently used only for exceptions occurring during startup
1553 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1554 Thread *THREAD = Thread::current();
1555 Handle h_throwable(THREAD, throwable);
1556 while (h_throwable.not_null()) {
1557 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1558 if (result.is_null()) {
1559 st->print_cr("%s", no_stack_trace_message());
1560 return;
1561 }
1562
1563 while (result.not_null()) {
1564
1565 // Get method id, bci, version and mirror from chunk
1566 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result));
1567 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result));
1568 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result));
1569 typeArrayHandle cprefs (THREAD, BacktraceBuilder::get_cprefs(result));
1570
1571 int length = methods()->length();
1572 for (int index = 0; index < length; index++) {
1573 Handle mirror(THREAD, mirrors->obj_at(index));
1574 // NULL mirror means end of stack trace
1575 if (mirror.is_null()) goto handle_cause;
1576 int method = methods->short_at(index);
1577 int version = version_at(bcis->int_at(index));
1578 int bci = bci_at(bcis->int_at(index));
1579 int cpref = cprefs->short_at(index);
1580 print_stack_element(st, mirror, method, version, bci, cpref);
1581 }
1582 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1583 }
1584 handle_cause:
1585 {
1586 EXCEPTION_MARK;
1587 JavaValue cause(T_OBJECT);
1588 JavaCalls::call_virtual(&cause,
1589 h_throwable,
1590 KlassHandle(THREAD, h_throwable->klass()),
1591 vmSymbols::getCause_name(),
1592 vmSymbols::void_throwable_signature(),
1593 THREAD);
1594 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1595 if (HAS_PENDING_EXCEPTION) {
1596 CLEAR_PENDING_EXCEPTION;
1597 h_throwable = Handle();
1598 } else {
1599 h_throwable = Handle(THREAD, (oop) cause.get_jobject());
1600 if (h_throwable.not_null()) {
1601 st->print("Caused by: ");
1602 print(h_throwable, st);
1603 st->cr();
1604 }
1605 }
1606 }
1607 }
1608 }
1609
1610 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) {
1611 if (!StackTraceInThrowable) return;
1612 ResourceMark rm(THREAD);
1613
1614 // Start out by clearing the backtrace for this object, in case the VM
1615 // runs out of memory while allocating the stack trace
1616 set_backtrace(throwable(), NULL);
1617 if (JDK_Version::is_gte_jdk14x_version()) {
1618 // New since 1.4, clear lazily constructed Java level stacktrace if
1619 // refilling occurs
1620 // This is unnecessary in 1.7+ but harmless
1621 clear_stacktrace(throwable());
1622 }
1623
1624 int max_depth = MaxJavaStackTraceDepth;
1625 JavaThread* thread = (JavaThread*)THREAD;
1626 BacktraceBuilder bt(CHECK);
1627
1628 // If there is no Java frame just return the method that was being called
1629 // with bci 0
1630 if (!thread->has_last_Java_frame()) {
1631 if (max_depth >= 1 && method() != NULL) {
1632 bt.push(method(), 0, CHECK);
1633 set_backtrace(throwable(), bt.backtrace());
1634 }
1635 return;
1636 }
1637
1638 // Instead of using vframe directly, this version of fill_in_stack_trace
1639 // basically handles everything by hand. This significantly improved the
1640 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1641 // See bug 6333838 for more details.
1642 // The "ASSERT" here is to verify this method generates the exactly same stack
1643 // trace as utilizing vframe.
1644 #ifdef ASSERT
1645 vframeStream st(thread);
1646 methodHandle st_method(THREAD, st.method());
1647 #endif
1648 int total_count = 0;
1649 RegisterMap map(thread, false);
1650 int decode_offset = 0;
1651 nmethod* nm = NULL;
1652 bool skip_fillInStackTrace_check = false;
1653 bool skip_throwableInit_check = false;
1654 bool skip_hidden = !ShowHiddenFrames;
1655
1656 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1657 Method* method = NULL;
1658 int bci = 0;
1659
1660 // Compiled java method case.
1661 if (decode_offset != 0) {
1662 DebugInfoReadStream stream(nm, decode_offset);
1663 decode_offset = stream.read_int();
1664 method = (Method*)nm->metadata_at(stream.read_int());
1665 bci = stream.read_bci();
1666 } else {
1667 if (fr.is_first_frame()) break;
1668 address pc = fr.pc();
1669 if (fr.is_interpreted_frame()) {
1670 intptr_t bcx = fr.interpreter_frame_bcx();
1671 method = fr.interpreter_frame_method();
1672 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
1673 fr = fr.sender(&map);
1674 } else {
1675 CodeBlob* cb = fr.cb();
1676 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1677 // but non nmethod
1678 fr = fr.sender(&map);
1679 if (cb == NULL || !cb->is_nmethod()) {
1680 continue;
1681 }
1682 nm = (nmethod*)cb;
1683 if (nm->method()->is_native()) {
1684 method = nm->method();
1685 bci = 0;
1686 } else {
1687 PcDesc* pd = nm->pc_desc_at(pc);
1688 decode_offset = pd->scope_decode_offset();
1689 // if decode_offset is not equal to 0, it will execute the
1690 // "compiled java method case" at the beginning of the loop.
1691 continue;
1692 }
1693 }
1694 }
1695 #ifdef ASSERT
1696 assert(st_method() == method && st.bci() == bci,
1697 "Wrong stack trace");
1698 st.next();
1699 // vframeStream::method isn't GC-safe so store off a copy
1700 // of the Method* in case we GC.
1701 if (!st.at_end()) {
1702 st_method = st.method();
1703 }
1704 #endif
1705
1706 // the format of the stacktrace will be:
1707 // - 1 or more fillInStackTrace frames for the exception class (skipped)
1708 // - 0 or more <init> methods for the exception class (skipped)
1709 // - rest of the stack
1710
1711 if (!skip_fillInStackTrace_check) {
1712 if ((method->name() == vmSymbols::fillInStackTrace_name() ||
1713 method->name() == vmSymbols::fillInStackTrace0_name()) &&
1714 throwable->is_a(method->method_holder())) {
1715 continue;
1716 }
1717 else {
1718 skip_fillInStackTrace_check = true; // gone past them all
1719 }
1720 }
1721 if (!skip_throwableInit_check) {
1722 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1723
1724 // skip <init> methods of the exception class and superclasses
1725 // This is simlar to classic VM.
1726 if (method->name() == vmSymbols::object_initializer_name() &&
1727 throwable->is_a(method->method_holder())) {
1728 continue;
1729 } else {
1730 // there are none or we've seen them all - either way stop checking
1731 skip_throwableInit_check = true;
1732 }
1733 }
1734 if (method->is_hidden()) {
1735 if (skip_hidden) continue;
1736 }
1737 bt.push(method, bci, CHECK);
1738 total_count++;
1739 }
1740
1741 // Put completed stack trace into throwable object
1742 set_backtrace(throwable(), bt.backtrace());
1743 }
1744
1745 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) {
1746 // No-op if stack trace is disabled
1747 if (!StackTraceInThrowable) {
1748 return;
1749 }
1750
1751 // Disable stack traces for some preallocated out of memory errors
1752 if (!Universe::should_fill_in_stack_trace(throwable)) {
1753 return;
1754 }
1755
1756 PRESERVE_EXCEPTION_MARK;
1757
1758 JavaThread* thread = JavaThread::active();
1759 fill_in_stack_trace(throwable, method, thread);
1760 // ignore exceptions thrown during stack trace filling
1761 CLEAR_PENDING_EXCEPTION;
1762 }
1763
1764 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1765 // Allocate stack trace - backtrace is created but not filled in
1766
1767 // No-op if stack trace is disabled
1768 if (!StackTraceInThrowable) return;
1769 BacktraceBuilder bt(CHECK); // creates a backtrace
1770 set_backtrace(throwable(), bt.backtrace());
1771 }
1772
1773
1774 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1775 // Fill in stack trace into preallocated backtrace (no GC)
1776
1777 // No-op if stack trace is disabled
1778 if (!StackTraceInThrowable) return;
1779
1780 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1781
1782 JavaThread* THREAD = JavaThread::current();
1783
1784 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
1785 assert(backtrace.not_null(), "backtrace should have been preallocated");
1786
1787 ResourceMark rm(THREAD);
1788 vframeStream st(THREAD);
1789
1790 BacktraceBuilder bt(backtrace);
1791
1792 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1793 // methods as preallocated errors aren't created by "java" code.
1794
1795 // fill in as much stack trace as possible
1796 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace);
1797 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1798 int chunk_count = 0;
1799
1800 for (;!st.at_end(); st.next()) {
1801 bt.push(st.method(), st.bci(), CHECK);
1802 chunk_count++;
1803
1804 // Bail-out for deep stacks
1805 if (chunk_count >= max_chunks) break;
1806 }
1807
1808 // For Java 7+ we support the Throwable immutability protocol defined for Java 7. This support
1809 // was missing in 7u0 so in 7u0 there is a workaround in the Throwable class. That workaround
1810 // can be removed in a JDK using this JVM version
1811 if (JDK_Version::is_gte_jdk17x_version()) {
1812 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
1813 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
1814 }
1815 }
1816
1817
1818 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1819 if (throwable == NULL) {
1820 THROW_0(vmSymbols::java_lang_NullPointerException());
1821 }
1822 objArrayOop chunk = objArrayOop(backtrace(throwable));
1823 int depth = 0;
1824 if (chunk != NULL) {
1825 // Iterate over chunks and count full ones
1826 while (true) {
1827 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1828 if (next == NULL) break;
1829 depth += trace_chunk_size;
1830 chunk = next;
1831 }
1832 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1833 // Count element in remaining partial chunk. NULL value for mirror
1834 // marks the end of the stack trace elements that are saved.
1835 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1836 assert(mirrors != NULL, "sanity check");
1837 for (int i = 0; i < mirrors->length(); i++) {
1838 if (mirrors->obj_at(i) == NULL) break;
1839 depth++;
1840 }
1841 }
1842 return depth;
1843 }
1844
1845
1846 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1847 if (throwable == NULL) {
1848 THROW_0(vmSymbols::java_lang_NullPointerException());
1849 }
1850 if (index < 0) {
1851 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1852 }
1853 // Compute how many chunks to skip and index into actual chunk
1854 objArrayOop chunk = objArrayOop(backtrace(throwable));
1855 int skip_chunks = index / trace_chunk_size;
1856 int chunk_index = index % trace_chunk_size;
1857 while (chunk != NULL && skip_chunks > 0) {
1858 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1859 skip_chunks--;
1860 }
1861 if (chunk == NULL) {
1862 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1863 }
1864 // Get method id, bci, version, mirror and cpref from chunk
1865 typeArrayOop methods = BacktraceBuilder::get_methods(chunk);
1866 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk);
1867 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1868 typeArrayOop cprefs = BacktraceBuilder::get_cprefs(chunk);
1869
1870 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check");
1871
1872 int method = methods->short_at(chunk_index);
1873 int version = version_at(bcis->int_at(chunk_index));
1874 int bci = bci_at(bcis->int_at(chunk_index));
1875 int cpref = cprefs->short_at(chunk_index);
1876 Handle mirror(THREAD, mirrors->obj_at(chunk_index));
1877
1878 // Chunk can be partial full
1879 if (mirror.is_null()) {
1880 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1881 }
1882 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, cpref, CHECK_0);
1883 return element;
1884 }
1885
1886 oop java_lang_StackTraceElement::create(Handle mirror, int method_id,
1887 int version, int bci, int cpref, TRAPS) {
1888 // Allocate java.lang.StackTraceElement instance
1889 Klass* k = SystemDictionary::StackTraceElement_klass();
1890 assert(k != NULL, "must be loaded in 1.4+");
1891 instanceKlassHandle ik (THREAD, k);
1892 if (ik->should_be_initialized()) {
1893 ik->initialize(CHECK_0);
1894 }
1895
1896 Handle element = ik->allocate_instance_handle(CHECK_0);
1897 // Fill in class name
1898 ResourceMark rm(THREAD);
1899 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1900 const char* str = holder->external_name();
1901 oop classname = StringTable::intern((char*) str, CHECK_0);
1902 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1903
1904 Method* method = holder->method_with_orig_idnum(method_id, version);
1905
1906 // The method can be NULL if the requested class version is gone
1907 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1908
1909 // Fill in method name
1910 oop methodname = StringTable::intern(sym, CHECK_0);
1911 java_lang_StackTraceElement::set_methodName(element(), methodname);
1912
1913 if (!version_matches(method, version)) {
1914 // The method was redefined, accurate line number information isn't available
1915 java_lang_StackTraceElement::set_fileName(element(), NULL);
1916 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1917 } else {
1918 // Fill in source file name and line number.
1919 // Use a specific ik version as a holder since the mirror might
1920 // refer to a version that is now obsolete and no longer accessible
1921 // via the previous versions list.
1922 holder = holder->get_klass_version(version);
1923 assert(holder != NULL, "sanity check");
1924 Symbol* source = holder->source_file_name();
1925 if (ShowHiddenFrames && source == NULL)
1926 source = vmSymbols::unknown_class_name();
1927 oop filename = StringTable::intern(source, CHECK_0);
1928 java_lang_StackTraceElement::set_fileName(element(), filename);
1929
1930 int line_number = get_line_number(method, bci);
1931 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1932 }
1933 return element();
1934 }
1935
1936 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1937 Handle mirror (THREAD, method->method_holder()->java_mirror());
1938 int method_id = method->orig_method_idnum();
1939 int cpref = method->name_index();
1940 return create(mirror, method_id, method->constants()->version(), bci, cpref, THREAD);
1941 }
1942
1943 void java_lang_reflect_AccessibleObject::compute_offsets() {
1944 Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
1945 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1946 }
1947
1948 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1949 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1950 return (jboolean) reflect->bool_field(override_offset);
1951 }
1952
1953 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1954 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1955 reflect->bool_field_put(override_offset, (int) value);
1956 }
1957
1958 void java_lang_reflect_Method::compute_offsets() {
1959 Klass* k = SystemDictionary::reflect_Method_klass();
1960 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1961 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1962 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1963 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1964 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1965 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1966 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1967 // The generic signature and annotations fields are only present in 1.5
1968 signature_offset = -1;
1969 annotations_offset = -1;
1970 parameter_annotations_offset = -1;
1971 annotation_default_offset = -1;
1972 type_annotations_offset = -1;
1973 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1974 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1975 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1976 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1977 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
1978 }
1979
1980 Handle java_lang_reflect_Method::create(TRAPS) {
1981 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1982 Klass* klass = SystemDictionary::reflect_Method_klass();
1983 // This class is eagerly initialized during VM initialization, since we keep a refence
1984 // to one of the methods
1985 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
1986 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
1987 }
1988
1989 oop java_lang_reflect_Method::clazz(oop reflect) {
1990 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1991 return reflect->obj_field(clazz_offset);
1992 }
1993
1994 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1995 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1996 reflect->obj_field_put(clazz_offset, value);
1997 }
1998
1999 int java_lang_reflect_Method::slot(oop reflect) {
2000 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2001 return reflect->int_field(slot_offset);
2002 }
2003
2004 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2005 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2006 reflect->int_field_put(slot_offset, value);
2007 }
2008
2009 oop java_lang_reflect_Method::name(oop method) {
2010 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2011 return method->obj_field(name_offset);
2012 }
2013
2014 void java_lang_reflect_Method::set_name(oop method, oop value) {
2015 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2016 method->obj_field_put(name_offset, value);
2017 }
2018
2019 oop java_lang_reflect_Method::return_type(oop method) {
2020 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2021 return method->obj_field(returnType_offset);
2022 }
2023
2024 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2025 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2026 method->obj_field_put(returnType_offset, value);
2027 }
2028
2029 oop java_lang_reflect_Method::parameter_types(oop method) {
2030 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2031 return method->obj_field(parameterTypes_offset);
2032 }
2033
2034 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2035 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2036 method->obj_field_put(parameterTypes_offset, value);
2037 }
2038
2039 oop java_lang_reflect_Method::exception_types(oop method) {
2040 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2041 return method->obj_field(exceptionTypes_offset);
2042 }
2043
2044 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2045 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2046 method->obj_field_put(exceptionTypes_offset, value);
2047 }
2048
2049 int java_lang_reflect_Method::modifiers(oop method) {
2050 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2051 return method->int_field(modifiers_offset);
2052 }
2053
2054 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2055 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2056 method->int_field_put(modifiers_offset, value);
2057 }
2058
2059 bool java_lang_reflect_Method::has_signature_field() {
2060 return (signature_offset >= 0);
2061 }
2062
2063 oop java_lang_reflect_Method::signature(oop method) {
2064 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2065 assert(has_signature_field(), "signature field must be present");
2066 return method->obj_field(signature_offset);
2067 }
2068
2069 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2070 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2071 assert(has_signature_field(), "signature field must be present");
2072 method->obj_field_put(signature_offset, value);
2073 }
2074
2075 bool java_lang_reflect_Method::has_annotations_field() {
2076 return (annotations_offset >= 0);
2077 }
2078
2079 oop java_lang_reflect_Method::annotations(oop method) {
2080 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2081 assert(has_annotations_field(), "annotations field must be present");
2082 return method->obj_field(annotations_offset);
2083 }
2084
2085 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2086 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2087 assert(has_annotations_field(), "annotations field must be present");
2088 method->obj_field_put(annotations_offset, value);
2089 }
2090
2091 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2092 return (parameter_annotations_offset >= 0);
2093 }
2094
2095 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2096 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2097 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2098 return method->obj_field(parameter_annotations_offset);
2099 }
2100
2101 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2102 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2103 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2104 method->obj_field_put(parameter_annotations_offset, value);
2105 }
2106
2107 bool java_lang_reflect_Method::has_annotation_default_field() {
2108 return (annotation_default_offset >= 0);
2109 }
2110
2111 oop java_lang_reflect_Method::annotation_default(oop method) {
2112 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2113 assert(has_annotation_default_field(), "annotation default field must be present");
2114 return method->obj_field(annotation_default_offset);
2115 }
2116
2117 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2118 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2119 assert(has_annotation_default_field(), "annotation default field must be present");
2120 method->obj_field_put(annotation_default_offset, value);
2121 }
2122
2123 bool java_lang_reflect_Method::has_type_annotations_field() {
2124 return (type_annotations_offset >= 0);
2125 }
2126
2127 oop java_lang_reflect_Method::type_annotations(oop method) {
2128 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2129 assert(has_type_annotations_field(), "type_annotations field must be present");
2130 return method->obj_field(type_annotations_offset);
2131 }
2132
2133 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2134 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2135 assert(has_type_annotations_field(), "type_annotations field must be present");
2136 method->obj_field_put(type_annotations_offset, value);
2137 }
2138
2139 void java_lang_reflect_Constructor::compute_offsets() {
2140 Klass* k = SystemDictionary::reflect_Constructor_klass();
2141 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2142 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2143 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2144 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2145 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2146 // The generic signature and annotations fields are only present in 1.5
2147 signature_offset = -1;
2148 annotations_offset = -1;
2149 parameter_annotations_offset = -1;
2150 type_annotations_offset = -1;
2151 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2152 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2153 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2154 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2155 }
2156
2157 Handle java_lang_reflect_Constructor::create(TRAPS) {
2158 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2159 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2160 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2161 instanceKlassHandle klass (THREAD, k);
2162 // Ensure it is initialized
2163 klass->initialize(CHECK_NH);
2164 return klass->allocate_instance_handle(CHECK_NH);
2165 }
2166
2167 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2168 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2169 return reflect->obj_field(clazz_offset);
2170 }
2171
2172 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2173 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2174 reflect->obj_field_put(clazz_offset, value);
2175 }
2176
2177 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2178 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2179 return constructor->obj_field(parameterTypes_offset);
2180 }
2181
2182 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2183 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2184 constructor->obj_field_put(parameterTypes_offset, value);
2185 }
2186
2187 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2188 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2189 return constructor->obj_field(exceptionTypes_offset);
2190 }
2191
2192 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2193 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2194 constructor->obj_field_put(exceptionTypes_offset, value);
2195 }
2196
2197 int java_lang_reflect_Constructor::slot(oop reflect) {
2198 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2199 return reflect->int_field(slot_offset);
2200 }
2201
2202 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2203 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2204 reflect->int_field_put(slot_offset, value);
2205 }
2206
2207 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2208 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2209 return constructor->int_field(modifiers_offset);
2210 }
2211
2212 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2213 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2214 constructor->int_field_put(modifiers_offset, value);
2215 }
2216
2217 bool java_lang_reflect_Constructor::has_signature_field() {
2218 return (signature_offset >= 0);
2219 }
2220
2221 oop java_lang_reflect_Constructor::signature(oop constructor) {
2222 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2223 assert(has_signature_field(), "signature field must be present");
2224 return constructor->obj_field(signature_offset);
2225 }
2226
2227 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2228 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2229 assert(has_signature_field(), "signature field must be present");
2230 constructor->obj_field_put(signature_offset, value);
2231 }
2232
2233 bool java_lang_reflect_Constructor::has_annotations_field() {
2234 return (annotations_offset >= 0);
2235 }
2236
2237 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2238 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2239 assert(has_annotations_field(), "annotations field must be present");
2240 return constructor->obj_field(annotations_offset);
2241 }
2242
2243 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2244 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2245 assert(has_annotations_field(), "annotations field must be present");
2246 constructor->obj_field_put(annotations_offset, value);
2247 }
2248
2249 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2250 return (parameter_annotations_offset >= 0);
2251 }
2252
2253 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2254 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2255 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2256 return method->obj_field(parameter_annotations_offset);
2257 }
2258
2259 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2260 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2261 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2262 method->obj_field_put(parameter_annotations_offset, value);
2263 }
2264
2265 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2266 return (type_annotations_offset >= 0);
2267 }
2268
2269 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2270 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2271 assert(has_type_annotations_field(), "type_annotations field must be present");
2272 return constructor->obj_field(type_annotations_offset);
2273 }
2274
2275 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2276 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2277 assert(has_type_annotations_field(), "type_annotations field must be present");
2278 constructor->obj_field_put(type_annotations_offset, value);
2279 }
2280
2281 void java_lang_reflect_Field::compute_offsets() {
2282 Klass* k = SystemDictionary::reflect_Field_klass();
2283 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2284 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2285 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
2286 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2287 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2288 // The generic signature and annotations fields are only present in 1.5
2289 signature_offset = -1;
2290 annotations_offset = -1;
2291 type_annotations_offset = -1;
2292 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2293 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2294 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2295 }
2296
2297 Handle java_lang_reflect_Field::create(TRAPS) {
2298 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2299 Symbol* name = vmSymbols::java_lang_reflect_Field();
2300 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2301 instanceKlassHandle klass (THREAD, k);
2302 // Ensure it is initialized
2303 klass->initialize(CHECK_NH);
2304 return klass->allocate_instance_handle(CHECK_NH);
2305 }
2306
2307 oop java_lang_reflect_Field::clazz(oop reflect) {
2308 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2309 return reflect->obj_field(clazz_offset);
2310 }
2311
2312 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2313 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2314 reflect->obj_field_put(clazz_offset, value);
2315 }
2316
2317 oop java_lang_reflect_Field::name(oop field) {
2318 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2319 return field->obj_field(name_offset);
2320 }
2321
2322 void java_lang_reflect_Field::set_name(oop field, oop value) {
2323 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2324 field->obj_field_put(name_offset, value);
2325 }
2326
2327 oop java_lang_reflect_Field::type(oop field) {
2328 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2329 return field->obj_field(type_offset);
2330 }
2331
2332 void java_lang_reflect_Field::set_type(oop field, oop value) {
2333 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2334 field->obj_field_put(type_offset, value);
2335 }
2336
2337 int java_lang_reflect_Field::slot(oop reflect) {
2338 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2339 return reflect->int_field(slot_offset);
2340 }
2341
2342 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2343 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2344 reflect->int_field_put(slot_offset, value);
2345 }
2346
2347 int java_lang_reflect_Field::modifiers(oop field) {
2348 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2349 return field->int_field(modifiers_offset);
2350 }
2351
2352 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2353 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2354 field->int_field_put(modifiers_offset, value);
2355 }
2356
2357 bool java_lang_reflect_Field::has_signature_field() {
2358 return (signature_offset >= 0);
2359 }
2360
2361 oop java_lang_reflect_Field::signature(oop field) {
2362 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2363 assert(has_signature_field(), "signature field must be present");
2364 return field->obj_field(signature_offset);
2365 }
2366
2367 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2368 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2369 assert(has_signature_field(), "signature field must be present");
2370 field->obj_field_put(signature_offset, value);
2371 }
2372
2373 bool java_lang_reflect_Field::has_annotations_field() {
2374 return (annotations_offset >= 0);
2375 }
2376
2377 oop java_lang_reflect_Field::annotations(oop field) {
2378 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2379 assert(has_annotations_field(), "annotations field must be present");
2380 return field->obj_field(annotations_offset);
2381 }
2382
2383 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2384 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2385 assert(has_annotations_field(), "annotations field must be present");
2386 field->obj_field_put(annotations_offset, value);
2387 }
2388
2389 bool java_lang_reflect_Field::has_type_annotations_field() {
2390 return (type_annotations_offset >= 0);
2391 }
2392
2393 oop java_lang_reflect_Field::type_annotations(oop field) {
2394 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2395 assert(has_type_annotations_field(), "type_annotations field must be present");
2396 return field->obj_field(type_annotations_offset);
2397 }
2398
2399 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2400 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2401 assert(has_type_annotations_field(), "type_annotations field must be present");
2402 field->obj_field_put(type_annotations_offset, value);
2403 }
2404
2405 void sun_reflect_ConstantPool::compute_offsets() {
2406 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2407 // This null test can be removed post beta
2408 if (k != NULL) {
2409 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2410 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2411 }
2412 }
2413
2414 void java_lang_reflect_Parameter::compute_offsets() {
2415 Klass* k = SystemDictionary::reflect_Parameter_klass();
2416 if(NULL != k) {
2417 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2418 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2419 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature());
2420 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature());
2421 }
2422 }
2423
2424 Handle java_lang_reflect_Parameter::create(TRAPS) {
2425 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2426 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2427 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2428 instanceKlassHandle klass (THREAD, k);
2429 // Ensure it is initialized
2430 klass->initialize(CHECK_NH);
2431 return klass->allocate_instance_handle(CHECK_NH);
2432 }
2433
2434 oop java_lang_reflect_Parameter::name(oop param) {
2435 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2436 return param->obj_field(name_offset);
2437 }
2438
2439 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2440 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2441 param->obj_field_put(name_offset, value);
2442 }
2443
2444 int java_lang_reflect_Parameter::modifiers(oop param) {
2445 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2446 return param->int_field(modifiers_offset);
2447 }
2448
2449 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2450 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2451 param->int_field_put(modifiers_offset, value);
2452 }
2453
2454 int java_lang_reflect_Parameter::index(oop param) {
2455 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2456 return param->int_field(index_offset);
2457 }
2458
2459 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2460 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2461 param->int_field_put(index_offset, value);
2462 }
2463
2464 oop java_lang_reflect_Parameter::executable(oop param) {
2465 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2466 return param->obj_field(executable_offset);
2467 }
2468
2469 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2470 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2471 param->obj_field_put(executable_offset, value);
2472 }
2473
2474
2475 Handle sun_reflect_ConstantPool::create(TRAPS) {
2476 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2477 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2478 instanceKlassHandle klass (THREAD, k);
2479 // Ensure it is initialized
2480 klass->initialize(CHECK_NH);
2481 return klass->allocate_instance_handle(CHECK_NH);
2482 }
2483
2484
2485 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2486 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2487 oop mirror = value->pool_holder()->java_mirror();
2488 // Save the mirror to get back the constant pool.
2489 reflect->obj_field_put(_oop_offset, mirror);
2490 }
2491
2492 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) {
2493 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2494
2495 oop mirror = reflect->obj_field(_oop_offset);
2496 Klass* k = java_lang_Class::as_Klass(mirror);
2497 assert(k->oop_is_instance(), "Must be");
2498
2499 // Get the constant pool back from the klass. Since class redefinition
2500 // merges the new constant pool into the old, this is essentially the
2501 // same constant pool as the original. If constant pool merging is
2502 // no longer done in the future, this will have to change to save
2503 // the original.
2504 return InstanceKlass::cast(k)->constants();
2505 }
2506
2507 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2508 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2509 // This null test can be removed post beta
2510 if (k != NULL) {
2511 compute_offset(_base_offset, k,
2512 vmSymbols::base_name(), vmSymbols::object_signature());
2513 }
2514 }
2515
2516 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2517 Klass* k = SystemDictionary::box_klass(type);
2518 if (k == NULL) return NULL;
2519 instanceKlassHandle h (THREAD, k);
2520 if (!h->is_initialized()) h->initialize(CHECK_0);
2521 return h->allocate_instance(THREAD);
2522 }
2523
2524
2525 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2526 oop box = initialize_and_allocate(type, CHECK_0);
2527 if (box == NULL) return NULL;
2528 switch (type) {
2529 case T_BOOLEAN:
2530 box->bool_field_put(value_offset, value->z);
2531 break;
2532 case T_CHAR:
2533 box->char_field_put(value_offset, value->c);
2534 break;
2535 case T_FLOAT:
2536 box->float_field_put(value_offset, value->f);
2537 break;
2538 case T_DOUBLE:
2539 box->double_field_put(long_value_offset, value->d);
2540 break;
2541 case T_BYTE:
2542 box->byte_field_put(value_offset, value->b);
2543 break;
2544 case T_SHORT:
2545 box->short_field_put(value_offset, value->s);
2546 break;
2547 case T_INT:
2548 box->int_field_put(value_offset, value->i);
2549 break;
2550 case T_LONG:
2551 box->long_field_put(long_value_offset, value->j);
2552 break;
2553 default:
2554 return NULL;
2555 }
2556 return box;
2557 }
2558
2559
2560 BasicType java_lang_boxing_object::basic_type(oop box) {
2561 if (box == NULL) return T_ILLEGAL;
2562 BasicType type = SystemDictionary::box_klass_type(box->klass());
2563 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2564 return T_ILLEGAL;
2565 return type;
2566 }
2567
2568
2569 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2570 BasicType type = SystemDictionary::box_klass_type(box->klass());
2571 switch (type) {
2572 case T_BOOLEAN:
2573 value->z = box->bool_field(value_offset);
2574 break;
2575 case T_CHAR:
2576 value->c = box->char_field(value_offset);
2577 break;
2578 case T_FLOAT:
2579 value->f = box->float_field(value_offset);
2580 break;
2581 case T_DOUBLE:
2582 value->d = box->double_field(long_value_offset);
2583 break;
2584 case T_BYTE:
2585 value->b = box->byte_field(value_offset);
2586 break;
2587 case T_SHORT:
2588 value->s = box->short_field(value_offset);
2589 break;
2590 case T_INT:
2591 value->i = box->int_field(value_offset);
2592 break;
2593 case T_LONG:
2594 value->j = box->long_field(long_value_offset);
2595 break;
2596 default:
2597 return T_ILLEGAL;
2598 } // end switch
2599 return type;
2600 }
2601
2602
2603 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2604 BasicType type = SystemDictionary::box_klass_type(box->klass());
2605 switch (type) {
2606 case T_BOOLEAN:
2607 box->bool_field_put(value_offset, value->z);
2608 break;
2609 case T_CHAR:
2610 box->char_field_put(value_offset, value->c);
2611 break;
2612 case T_FLOAT:
2613 box->float_field_put(value_offset, value->f);
2614 break;
2615 case T_DOUBLE:
2616 box->double_field_put(long_value_offset, value->d);
2617 break;
2618 case T_BYTE:
2619 box->byte_field_put(value_offset, value->b);
2620 break;
2621 case T_SHORT:
2622 box->short_field_put(value_offset, value->s);
2623 break;
2624 case T_INT:
2625 box->int_field_put(value_offset, value->i);
2626 break;
2627 case T_LONG:
2628 box->long_field_put(long_value_offset, value->j);
2629 break;
2630 default:
2631 return T_ILLEGAL;
2632 } // end switch
2633 return type;
2634 }
2635
2636
2637 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2638 switch (type) {
2639 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2640 case T_CHAR: st->print("%d", value->c); break;
2641 case T_BYTE: st->print("%d", value->b); break;
2642 case T_SHORT: st->print("%d", value->s); break;
2643 case T_INT: st->print("%d", value->i); break;
2644 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2645 case T_FLOAT: st->print("%f", value->f); break;
2646 case T_DOUBLE: st->print("%lf", value->d); break;
2647 default: st->print("type %d?", type); break;
2648 }
2649 }
2650
2651
2652 // Support for java_lang_ref_Reference
2653 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() {
2654 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2655 address addr = ik->static_field_addr(static_lock_offset);
2656 return (HeapWord*) addr;
2657 }
2658
2659 oop java_lang_ref_Reference::pending_list_lock() {
2660 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2661 address addr = ik->static_field_addr(static_lock_offset);
2662 oop result;
2663 if (UseCompressedOops) {
2664 result = oopDesc::load_decode_heap_oop((narrowOop *)addr);
2665 } else {
2666 result = oopDesc::load_decode_heap_oop((oop*)addr);
2667 }
2668 #if INCLUDE_ALL_GCS
2669 if (UseShenandoahGC) {
2670 result = ShenandoahBarrierSet::barrier_set()->load_reference_barrier(result);
2671 }
2672 #endif
2673 return result;
2674 }
2675
2676 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2677 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2678 address addr = ik->static_field_addr(static_pending_offset);
2679 // XXX This might not be HeapWord aligned, almost rather be char *.
2680 return (HeapWord*)addr;
2681 }
2682
2683 oop java_lang_ref_Reference::pending_list() {
2684 char *addr = (char *)pending_list_addr();
2685 oop result;
2686 if (UseCompressedOops) {
2687 result = oopDesc::load_decode_heap_oop((narrowOop *)addr);
2688 } else {
2689 result = oopDesc::load_decode_heap_oop((oop*)addr);
2690 }
2691 #if INCLUDE_ALL_GCS
2692 if (UseShenandoahGC) {
2693 result = ShenandoahBarrierSet::barrier_set()->load_reference_barrier(result);
2694 }
2695 #endif
2696 return result;
2697 }
2698
2699
2700 // Support for java_lang_ref_SoftReference
2701
2702 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2703 return ref->long_field(timestamp_offset);
2704 }
2705
2706 jlong java_lang_ref_SoftReference::clock() {
2707 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2708 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2709 return *offset;
2710 }
2711
2712 void java_lang_ref_SoftReference::set_clock(jlong value) {
2713 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2714 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2715 *offset = value;
2716 }
2717
2718 // Support for java_lang_ref_ReferenceQueue
2719
2720 oop java_lang_ref_ReferenceQueue::NULL_queue() {
2721 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::ReferenceQueue_klass());
2722 oop mirror = ik->java_mirror();
2723 return mirror->obj_field(static_NULL_queue_offset);
2724 }
2725
2726 oop java_lang_ref_ReferenceQueue::ENQUEUED_queue() {
2727 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::ReferenceQueue_klass());
2728 oop mirror = ik->java_mirror();
2729 return mirror->obj_field(static_ENQUEUED_queue_offset);
2730 }
2731
2732 void java_lang_ref_ReferenceQueue::compute_offsets() {
2733 Klass* k = SystemDictionary::ReferenceQueue_klass();
2734 compute_offset(static_NULL_queue_offset,
2735 k,
2736 vmSymbols::referencequeue_null_name(),
2737 vmSymbols::referencequeue_signature());
2738 compute_offset(static_ENQUEUED_queue_offset,
2739 k,
2740 vmSymbols::referencequeue_enqueued_name(),
2741 vmSymbols::referencequeue_signature());
2742 }
2743
2744 // Support for java_lang_invoke_DirectMethodHandle
2745
2746 int java_lang_invoke_DirectMethodHandle::_member_offset;
2747
2748 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
2749 oop member_name = NULL;
2750 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
2751 assert(is_dmh, "a DirectMethodHandle oop is expected");
2752 if (is_dmh) {
2753 member_name = dmh->obj_field(member_offset_in_bytes());
2754 }
2755 return member_name;
2756 }
2757
2758 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
2759 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
2760 if (klass_oop != NULL && EnableInvokeDynamic) {
2761 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2762 }
2763 }
2764
2765 // Support for java_lang_invoke_MethodHandle
2766
2767 int java_lang_invoke_MethodHandle::_type_offset;
2768 int java_lang_invoke_MethodHandle::_form_offset;
2769
2770 int java_lang_invoke_MemberName::_clazz_offset;
2771 int java_lang_invoke_MemberName::_name_offset;
2772 int java_lang_invoke_MemberName::_type_offset;
2773 int java_lang_invoke_MemberName::_flags_offset;
2774 int java_lang_invoke_MemberName::_vmtarget_offset;
2775 int java_lang_invoke_MemberName::_vmloader_offset;
2776 int java_lang_invoke_MemberName::_vmindex_offset;
2777
2778 int java_lang_invoke_LambdaForm::_vmentry_offset;
2779
2780 void java_lang_invoke_MethodHandle::compute_offsets() {
2781 Klass* klass_oop = SystemDictionary::MethodHandle_klass();
2782 if (klass_oop != NULL && EnableInvokeDynamic) {
2783 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
2784 compute_optional_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
2785 if (_form_offset == 0) {
2786 EnableInvokeDynamic = false;
2787 }
2788 }
2789 }
2790
2791 void java_lang_invoke_MemberName::compute_offsets() {
2792 Klass* klass_oop = SystemDictionary::MemberName_klass();
2793 if (klass_oop != NULL && EnableInvokeDynamic) {
2794 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature());
2795 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature());
2796 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature());
2797 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature());
2798 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2799 }
2800 }
2801
2802 void java_lang_invoke_LambdaForm::compute_offsets() {
2803 Klass* klass_oop = SystemDictionary::LambdaForm_klass();
2804 if (klass_oop != NULL && EnableInvokeDynamic) {
2805 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2806 }
2807 }
2808
2809 oop java_lang_invoke_MethodHandle::type(oop mh) {
2810 return mh->obj_field(_type_offset);
2811 }
2812
2813 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
2814 mh->obj_field_put(_type_offset, mtype);
2815 }
2816
2817 oop java_lang_invoke_MethodHandle::form(oop mh) {
2818 assert(_form_offset != 0, "");
2819 return mh->obj_field(_form_offset);
2820 }
2821
2822 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
2823 assert(_form_offset != 0, "");
2824 mh->obj_field_put(_form_offset, lform);
2825 }
2826
2827 /// MemberName accessors
2828
2829 oop java_lang_invoke_MemberName::clazz(oop mname) {
2830 assert(is_instance(mname), "wrong type");
2831 return mname->obj_field(_clazz_offset);
2832 }
2833
2834 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
2835 assert(is_instance(mname), "wrong type");
2836 mname->obj_field_put(_clazz_offset, clazz);
2837 }
2838
2839 oop java_lang_invoke_MemberName::name(oop mname) {
2840 assert(is_instance(mname), "wrong type");
2841 return mname->obj_field(_name_offset);
2842 }
2843
2844 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
2845 assert(is_instance(mname), "wrong type");
2846 mname->obj_field_put(_name_offset, name);
2847 }
2848
2849 oop java_lang_invoke_MemberName::type(oop mname) {
2850 assert(is_instance(mname), "wrong type");
2851 return mname->obj_field(_type_offset);
2852 }
2853
2854 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
2855 assert(is_instance(mname), "wrong type");
2856 mname->obj_field_put(_type_offset, type);
2857 }
2858
2859 int java_lang_invoke_MemberName::flags(oop mname) {
2860 assert(is_instance(mname), "wrong type");
2861 return mname->int_field(_flags_offset);
2862 }
2863
2864 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
2865 assert(is_instance(mname), "wrong type");
2866 mname->int_field_put(_flags_offset, flags);
2867 }
2868
2869 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
2870 assert(is_instance(mname), "wrong type");
2871 return (Metadata*)mname->address_field(_vmtarget_offset);
2872 }
2873
2874 bool java_lang_invoke_MemberName::is_method(oop mname) {
2875 assert(is_instance(mname), "must be MemberName");
2876 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
2877 }
2878
2879 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
2880 assert(is_instance(mname), "wrong type");
2881 // check the type of the vmtarget
2882 oop dependency = NULL;
2883 if (ref != NULL) {
2884 switch (flags(mname) & (MN_IS_METHOD |
2885 MN_IS_CONSTRUCTOR |
2886 MN_IS_FIELD)) {
2887 case MN_IS_METHOD:
2888 case MN_IS_CONSTRUCTOR:
2889 assert(ref->is_method(), "should be a method");
2890 dependency = ((Method*)ref)->method_holder()->java_mirror();
2891 break;
2892 case MN_IS_FIELD:
2893 assert(ref->is_klass(), "should be a class");
2894 dependency = ((Klass*)ref)->java_mirror();
2895 break;
2896 default:
2897 ShouldNotReachHere();
2898 }
2899 }
2900 mname->address_field_put(_vmtarget_offset, (address)ref);
2901 // Add a reference to the loader (actually mirror because anonymous classes will not have
2902 // distinct loaders) to ensure the metadata is kept alive
2903 // This mirror may be different than the one in clazz field.
2904 mname->obj_field_put(_vmloader_offset, dependency);
2905 }
2906
2907 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
2908 assert(is_instance(mname), "wrong type");
2909 return (intptr_t) mname->address_field(_vmindex_offset);
2910 }
2911
2912 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
2913 assert(is_instance(mname), "wrong type");
2914 mname->address_field_put(_vmindex_offset, (address) index);
2915 }
2916
2917 bool java_lang_invoke_MemberName::equals(oop mn1, oop mn2) {
2918 if (mn1 == mn2) {
2919 return true;
2920 }
2921 return (vmtarget(mn1) == vmtarget(mn2) && flags(mn1) == flags(mn2) &&
2922 vmindex(mn1) == vmindex(mn2) &&
2923 clazz(mn1) == clazz(mn2));
2924 }
2925
2926 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
2927 assert(is_instance(lform), "wrong type");
2928 return lform->obj_field(_vmentry_offset);
2929 }
2930
2931
2932 // Support for java_lang_invoke_MethodType
2933
2934 int java_lang_invoke_MethodType::_rtype_offset;
2935 int java_lang_invoke_MethodType::_ptypes_offset;
2936
2937 void java_lang_invoke_MethodType::compute_offsets() {
2938 Klass* k = SystemDictionary::MethodType_klass();
2939 if (k != NULL) {
2940 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2941 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2942 }
2943 }
2944
2945 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
2946 st->print("(");
2947 objArrayOop pts = ptypes(mt);
2948 for (int i = 0, limit = pts->length(); i < limit; i++) {
2949 java_lang_Class::print_signature(pts->obj_at(i), st);
2950 }
2951 st->print(")");
2952 java_lang_Class::print_signature(rtype(mt), st);
2953 }
2954
2955 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2956 ResourceMark rm;
2957 stringStream buffer(128);
2958 print_signature(mt, &buffer);
2959 const char* sigstr = buffer.base();
2960 int siglen = (int) buffer.size();
2961 Symbol *name;
2962 if (!intern_if_not_found) {
2963 name = SymbolTable::probe(sigstr, siglen);
2964 } else {
2965 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2966 }
2967 return name;
2968 }
2969
2970 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
2971 if (mt1 == mt2)
2972 return true;
2973 if (rtype(mt1) != rtype(mt2))
2974 return false;
2975 if (ptype_count(mt1) != ptype_count(mt2))
2976 return false;
2977 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
2978 if (ptype(mt1, i) != ptype(mt2, i))
2979 return false;
2980 }
2981 return true;
2982 }
2983
2984 oop java_lang_invoke_MethodType::rtype(oop mt) {
2985 assert(is_instance(mt), "must be a MethodType");
2986 return mt->obj_field(_rtype_offset);
2987 }
2988
2989 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
2990 assert(is_instance(mt), "must be a MethodType");
2991 return (objArrayOop) mt->obj_field(_ptypes_offset);
2992 }
2993
2994 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
2995 return ptypes(mt)->obj_at(idx);
2996 }
2997
2998 int java_lang_invoke_MethodType::ptype_count(oop mt) {
2999 return ptypes(mt)->length();
3000 }
3001
3002 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3003 objArrayOop pts = ptypes(mt);
3004 int count = pts->length();
3005 int slots = 0;
3006 for (int i = 0; i < count; i++) {
3007 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3008 slots += type2size[bt];
3009 }
3010 return slots;
3011 }
3012
3013 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3014 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3015 return type2size[bt];
3016 }
3017
3018
3019 // Support for java_lang_invoke_CallSite
3020
3021 int java_lang_invoke_CallSite::_target_offset;
3022
3023 void java_lang_invoke_CallSite::compute_offsets() {
3024 if (!EnableInvokeDynamic) return;
3025 Klass* k = SystemDictionary::CallSite_klass();
3026 if (k != NULL) {
3027 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
3028 }
3029 }
3030
3031
3032 // Support for java_security_AccessControlContext
3033
3034 int java_security_AccessControlContext::_context_offset = 0;
3035 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3036 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3037 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3038
3039 void java_security_AccessControlContext::compute_offsets() {
3040 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3041 fieldDescriptor fd;
3042 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass());
3043
3044 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
3045 fatal("Invalid layout of java.security.AccessControlContext");
3046 }
3047 _context_offset = fd.offset();
3048
3049 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
3050 fatal("Invalid layout of java.security.AccessControlContext");
3051 }
3052 _privilegedContext_offset = fd.offset();
3053
3054 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
3055 fatal("Invalid layout of java.security.AccessControlContext");
3056 }
3057 _isPrivileged_offset = fd.offset();
3058
3059 // The offset may not be present for bootstrapping with older JDK.
3060 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
3061 _isAuthorized_offset = fd.offset();
3062 }
3063 }
3064
3065
3066 bool java_security_AccessControlContext::is_authorized(Handle context) {
3067 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
3068 assert(_isAuthorized_offset != -1, "should be set");
3069 return context->bool_field(_isAuthorized_offset) != 0;
3070 }
3071
3072 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3073 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3074 // Ensure klass is initialized
3075 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
3076 // Allocate result
3077 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
3078 // Fill in values
3079 result->obj_field_put(_context_offset, context());
3080 result->obj_field_put(_privilegedContext_offset, privileged_context());
3081 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3082 // whitelist AccessControlContexts created by the JVM if present
3083 if (_isAuthorized_offset != -1) {
3084 result->bool_field_put(_isAuthorized_offset, true);
3085 }
3086 return result;
3087 }
3088
3089
3090 // Support for java_lang_ClassLoader
3091
3092 bool java_lang_ClassLoader::offsets_computed = false;
3093 int java_lang_ClassLoader::_loader_data_offset = -1;
3094 int java_lang_ClassLoader::parallelCapable_offset = -1;
3095
3096 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
3097 assert(loader != NULL && loader->is_oop(), "loader must be oop");
3098 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
3099 }
3100
3101 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
3102 return *java_lang_ClassLoader::loader_data_addr(loader);
3103 }
3104
3105 void java_lang_ClassLoader::compute_offsets() {
3106 assert(!offsets_computed, "offsets should be initialized only once");
3107 offsets_computed = true;
3108
3109 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
3110 Klass* k1 = SystemDictionary::ClassLoader_klass();
3111 compute_optional_offset(parallelCapable_offset,
3112 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
3113
3114 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3115 }
3116
3117 oop java_lang_ClassLoader::parent(oop loader) {
3118 assert(is_instance(loader), "loader must be oop");
3119 return loader->obj_field(parent_offset);
3120 }
3121
3122 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3123 assert(is_instance(loader), "loader must be oop");
3124 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3125 oop acl = loader;
3126 debug_only(jint loop_count = 0);
3127 // This loop taken verbatim from ClassLoader.java:
3128 do {
3129 acl = parent(acl);
3130 if (cl == acl) {
3131 return true;
3132 }
3133 assert(++loop_count > 0, "loop_count overflow");
3134 } while (acl != NULL);
3135 return false;
3136 }
3137
3138
3139 // For class loader classes, parallelCapable defined
3140 // based on non-null field
3141 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3142 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3143 if (!JDK_Version::is_gte_jdk17x_version()
3144 || parallelCapable_offset == -1) {
3145 // Default for backward compatibility is false
3146 return false;
3147 }
3148 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3149 }
3150
3151 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3152 // Fix for 4474172; see evaluation for more details
3153 loader = non_reflection_class_loader(loader);
3154
3155 oop cl = SystemDictionary::java_system_loader();
3156 while(cl != NULL) {
3157 if (cl == loader) return true;
3158 cl = parent(cl);
3159 }
3160 return false;
3161 }
3162
3163 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3164 if (loader != NULL) {
3165 // See whether this is one of the class loaders associated with
3166 // the generated bytecodes for reflection, and if so, "magically"
3167 // delegate to its parent to prevent class loading from occurring
3168 // in places where applications using reflection didn't expect it.
3169 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3170 // This might be null in non-1.4 JDKs
3171 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
3172 return parent(loader);
3173 }
3174 }
3175 return loader;
3176 }
3177
3178
3179 // Support for java_lang_System
3180 int java_lang_System::in_offset_in_bytes() {
3181 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3182 }
3183
3184
3185 int java_lang_System::out_offset_in_bytes() {
3186 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3187 }
3188
3189
3190 int java_lang_System::err_offset_in_bytes() {
3191 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3192 }
3193
3194
3195 bool java_lang_System::has_security_manager() {
3196 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass());
3197 address addr = ik->static_field_addr(static_security_offset);
3198 if (UseCompressedOops) {
3199 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3200 } else {
3201 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3202 }
3203 }
3204
3205 int java_lang_Class::_klass_offset;
3206 int java_lang_Class::_array_klass_offset;
3207 int java_lang_Class::_oop_size_offset;
3208 int java_lang_Class::_static_oop_field_count_offset;
3209 int java_lang_Class::_class_loader_offset;
3210 int java_lang_Class::_protection_domain_offset;
3211 int java_lang_Class::_init_lock_offset;
3212 int java_lang_Class::_signers_offset;
3213 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3214 int java_lang_Throwable::backtrace_offset;
3215 int java_lang_Throwable::detailMessage_offset;
3216 int java_lang_Throwable::cause_offset;
3217 int java_lang_Throwable::stackTrace_offset;
3218 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3219 int java_lang_reflect_AccessibleObject::override_offset;
3220 int java_lang_reflect_Method::clazz_offset;
3221 int java_lang_reflect_Method::name_offset;
3222 int java_lang_reflect_Method::returnType_offset;
3223 int java_lang_reflect_Method::parameterTypes_offset;
3224 int java_lang_reflect_Method::exceptionTypes_offset;
3225 int java_lang_reflect_Method::slot_offset;
3226 int java_lang_reflect_Method::modifiers_offset;
3227 int java_lang_reflect_Method::signature_offset;
3228 int java_lang_reflect_Method::annotations_offset;
3229 int java_lang_reflect_Method::parameter_annotations_offset;
3230 int java_lang_reflect_Method::annotation_default_offset;
3231 int java_lang_reflect_Method::type_annotations_offset;
3232 int java_lang_reflect_Constructor::clazz_offset;
3233 int java_lang_reflect_Constructor::parameterTypes_offset;
3234 int java_lang_reflect_Constructor::exceptionTypes_offset;
3235 int java_lang_reflect_Constructor::slot_offset;
3236 int java_lang_reflect_Constructor::modifiers_offset;
3237 int java_lang_reflect_Constructor::signature_offset;
3238 int java_lang_reflect_Constructor::annotations_offset;
3239 int java_lang_reflect_Constructor::parameter_annotations_offset;
3240 int java_lang_reflect_Constructor::type_annotations_offset;
3241 int java_lang_reflect_Field::clazz_offset;
3242 int java_lang_reflect_Field::name_offset;
3243 int java_lang_reflect_Field::type_offset;
3244 int java_lang_reflect_Field::slot_offset;
3245 int java_lang_reflect_Field::modifiers_offset;
3246 int java_lang_reflect_Field::signature_offset;
3247 int java_lang_reflect_Field::annotations_offset;
3248 int java_lang_reflect_Field::type_annotations_offset;
3249 int java_lang_reflect_Parameter::name_offset;
3250 int java_lang_reflect_Parameter::modifiers_offset;
3251 int java_lang_reflect_Parameter::index_offset;
3252 int java_lang_reflect_Parameter::executable_offset;
3253 int java_lang_boxing_object::value_offset;
3254 int java_lang_boxing_object::long_value_offset;
3255 int java_lang_ref_Reference::referent_offset;
3256 int java_lang_ref_Reference::queue_offset;
3257 int java_lang_ref_Reference::next_offset;
3258 int java_lang_ref_Reference::discovered_offset;
3259 int java_lang_ref_Reference::static_lock_offset;
3260 int java_lang_ref_Reference::static_pending_offset;
3261 int java_lang_ref_Reference::number_of_fake_oop_fields;
3262 int java_lang_ref_ReferenceQueue::static_NULL_queue_offset;
3263 int java_lang_ref_ReferenceQueue::static_ENQUEUED_queue_offset;
3264 int java_lang_ref_SoftReference::timestamp_offset;
3265 int java_lang_ref_SoftReference::static_clock_offset;
3266 int java_lang_ClassLoader::parent_offset;
3267 int java_lang_System::static_in_offset;
3268 int java_lang_System::static_out_offset;
3269 int java_lang_System::static_err_offset;
3270 int java_lang_System::static_security_offset;
3271 int java_lang_StackTraceElement::declaringClass_offset;
3272 int java_lang_StackTraceElement::methodName_offset;
3273 int java_lang_StackTraceElement::fileName_offset;
3274 int java_lang_StackTraceElement::lineNumber_offset;
3275 int java_lang_AssertionStatusDirectives::classes_offset;
3276 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3277 int java_lang_AssertionStatusDirectives::packages_offset;
3278 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3279 int java_lang_AssertionStatusDirectives::deflt_offset;
3280 int java_nio_Buffer::_limit_offset;
3281 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3282 int sun_reflect_ConstantPool::_oop_offset;
3283 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3284
3285
3286 // Support for java_lang_StackTraceElement
3287
3288 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3289 element->obj_field_put(fileName_offset, value);
3290 }
3291
3292 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3293 element->obj_field_put(declaringClass_offset, value);
3294 }
3295
3296 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3297 element->obj_field_put(methodName_offset, value);
3298 }
3299
3300 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3301 element->int_field_put(lineNumber_offset, value);
3302 }
3303
3304
3305 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3306
3307 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3308 o->obj_field_put(classes_offset, val);
3309 }
3310
3311 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3312 o->obj_field_put(classEnabled_offset, val);
3313 }
3314
3315 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3316 o->obj_field_put(packages_offset, val);
3317 }
3318
3319 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3320 o->obj_field_put(packageEnabled_offset, val);
3321 }
3322
3323 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3324 o->bool_field_put(deflt_offset, val);
3325 }
3326
3327
3328 // Support for intrinsification of java.nio.Buffer.checkIndex
3329 int java_nio_Buffer::limit_offset() {
3330 return _limit_offset;
3331 }
3332
3333
3334 void java_nio_Buffer::compute_offsets() {
3335 Klass* k = SystemDictionary::nio_Buffer_klass();
3336 assert(k != NULL, "must be loaded in 1.4+");
3337 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3338 }
3339
3340 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3341 if (_owner_offset != 0) return;
3342
3343 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
3344 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3345 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3346 compute_offset(_owner_offset, k,
3347 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3348 }
3349
3350 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3351 assert(_owner_offset != 0, "Must be initialized");
3352 return obj->obj_field(_owner_offset);
3353 }
3354
3355 // Compute hard-coded offsets
3356 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3357 // are not available to determine the offset_of_static_fields.
3358 void JavaClasses::compute_hard_coded_offsets() {
3359 const int x = heapOopSize;
3360 const int header = instanceOopDesc::base_offset_in_bytes();
3361
3362 // Throwable Class
3363 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
3364 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3365 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
3366 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3367 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x;
3368
3369 // java_lang_boxing_object
3370 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3371 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3372
3373 // java_lang_ref_Reference:
3374 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3375 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3376 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
3377 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
3378 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
3379 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3380 // Artificial fields for java_lang_ref_Reference
3381 // The first field is for the discovered field added in 1.4
3382 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3383
3384 // java_lang_ref_SoftReference Class
3385 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3386 // Don't multiply static fields because they are always in wordSize units
3387 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3388
3389 // java_lang_ClassLoader
3390 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3391
3392 // java_lang_System
3393 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
3394 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3395 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3396 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3397
3398 // java_lang_StackTraceElement
3399 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
3400 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3401 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
3402 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3403 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3404 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3405 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3406 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3407 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3408
3409 }
3410
3411
3412 // Compute non-hard-coded field offsets of all the classes in this file
3413 void JavaClasses::compute_offsets() {
3414 // java_lang_Class::compute_offsets was called earlier in bootstrap
3415 java_lang_ClassLoader::compute_offsets();
3416 java_lang_Thread::compute_offsets();
3417 java_lang_ThreadGroup::compute_offsets();
3418 if (EnableInvokeDynamic) {
3419 java_lang_invoke_MethodHandle::compute_offsets();
3420 java_lang_invoke_DirectMethodHandle::compute_offsets();
3421 java_lang_invoke_MemberName::compute_offsets();
3422 java_lang_invoke_LambdaForm::compute_offsets();
3423 java_lang_invoke_MethodType::compute_offsets();
3424 java_lang_invoke_CallSite::compute_offsets();
3425 }
3426 java_security_AccessControlContext::compute_offsets();
3427 // Initialize reflection classes. The layouts of these classes
3428 // changed with the new reflection implementation in JDK 1.4, and
3429 // since the Universe doesn't know what JDK version it is until this
3430 // point we defer computation of these offsets until now.
3431 java_lang_reflect_AccessibleObject::compute_offsets();
3432 java_lang_reflect_Method::compute_offsets();
3433 java_lang_reflect_Constructor::compute_offsets();
3434 java_lang_reflect_Field::compute_offsets();
3435 if (JDK_Version::is_gte_jdk14x_version()) {
3436 java_nio_Buffer::compute_offsets();
3437 }
3438 if (JDK_Version::is_gte_jdk15x_version()) {
3439 sun_reflect_ConstantPool::compute_offsets();
3440 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3441 }
3442 if (JDK_Version::is_jdk18x_version())
3443 java_lang_reflect_Parameter::compute_offsets();
3444
3445 java_lang_ref_ReferenceQueue::compute_offsets();
3446
3447 // generated interpreter code wants to know about the offsets we just computed:
3448 AbstractAssembler::update_delayed_values();
3449 }
3450
3451 #ifndef PRODUCT
3452
3453 // These functions exist to assert the validity of hard-coded field offsets to guard
3454 // against changes in the class files
3455
3456 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3457 EXCEPTION_MARK;
3458 fieldDescriptor fd;
3459 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3460 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3461 instanceKlassHandle h_klass (THREAD, k);
3462 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3463 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3464 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3465 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3466 return false;
3467 }
3468 if (fd.is_static()) {
3469 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3470 return false;
3471 }
3472 if (fd.offset() == hardcoded_offset ) {
3473 return true;
3474 } else {
3475 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3476 klass_name, field_name, hardcoded_offset, fd.offset());
3477 return false;
3478 }
3479 }
3480
3481
3482 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3483 EXCEPTION_MARK;
3484 fieldDescriptor fd;
3485 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3486 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3487 instanceKlassHandle h_klass (THREAD, k);
3488 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3489 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3490 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3491 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3492 return false;
3493 }
3494 if (!fd.is_static()) {
3495 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3496 return false;
3497 }
3498 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3499 return true;
3500 } else {
3501 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());
3502 return false;
3503 }
3504 }
3505
3506
3507 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3508 EXCEPTION_MARK;
3509 fieldDescriptor fd;
3510 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3511 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3512 instanceKlassHandle h_klass (THREAD, k);
3513 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3514 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3515 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3516 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3517 return false;
3518 }
3519 if (!fd.is_static() || !fd.has_initial_value()) {
3520 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3521 return false;
3522 }
3523 if (!fd.initial_value_tag().is_int()) {
3524 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3525 return false;
3526 }
3527 jint field_value = fd.int_initial_value();
3528 if (field_value == hardcoded_constant) {
3529 return true;
3530 } else {
3531 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);
3532 return false;
3533 }
3534 }
3535
3536
3537 // Check the hard-coded field offsets of all the classes in this file
3538
3539 void JavaClasses::check_offsets() {
3540 bool valid = true;
3541 HandleMark hm;
3542
3543 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3544 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3545
3546 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3547 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3548
3549 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3550 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3551
3552 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3553 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3554
3555 // java.lang.String
3556
3557 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3558 if (java_lang_String::has_offset_field()) {
3559 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3560 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3561 }
3562 if (java_lang_String::has_hash_field()) {
3563 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3564 }
3565
3566 // java.lang.Class
3567
3568 // Fake fields
3569 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3570 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3571
3572 // java.lang.Throwable
3573
3574 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3575 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3576 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3577 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3578
3579 // Boxed primitive objects (java_lang_boxing_object)
3580
3581 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3582 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3583 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3584 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3585 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3586 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3587 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3588 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3589
3590 // java.lang.ClassLoader
3591
3592 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3593
3594 // java.lang.System
3595
3596 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3597 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3598 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3599 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
3600
3601 // java.lang.StackTraceElement
3602
3603 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3604 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3605 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3606 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3607
3608 // java.lang.ref.Reference
3609
3610 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3611 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3612 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3613 // Fake field
3614 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3615 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3616 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3617
3618 // java.lang.ref.SoftReference
3619
3620 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3621 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3622
3623 // java.lang.AssertionStatusDirectives
3624 //
3625 // The CheckAssertionStatusDirectives boolean can be removed from here and
3626 // globals.hpp after the AssertionStatusDirectives class has been integrated
3627 // into merlin "for some time." Without it, the vm will fail with early
3628 // merlin builds.
3629
3630 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) {
3631 const char* nm = "java/lang/AssertionStatusDirectives";
3632 const char* sig = "[Ljava/lang/String;";
3633 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3634 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3635 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3636 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3637 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3638 }
3639
3640 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3641 }
3642
3643 #endif // PRODUCT
3644
3645 int InjectedField::compute_offset() {
3646 Klass* klass_oop = klass();
3647 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3648 if (!may_be_java && !fs.access_flags().is_internal()) {
3649 // Only look at injected fields
3650 continue;
3651 }
3652 if (fs.name() == name() && fs.signature() == signature()) {
3653 return fs.offset();
3654 }
3655 }
3656 ResourceMark rm;
3657 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)" : "");
3658 #ifndef PRODUCT
3659 klass_oop->print();
3660 tty->print_cr("all fields:");
3661 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3662 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
3663 }
3664 #endif //PRODUCT
3665 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class");
3666 return -1;
3667 }
3668
3669 void javaClasses_init() {
3670 JavaClasses::compute_offsets();
3671 JavaClasses::check_offsets();
3672 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3673 }