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