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