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