Mon, 29 Apr 2013 16:13:57 -0400
8011773: Some tests on Interned String crashed JVM with OOM
Summary: Instead of terminating the VM, throw OutOfMemoryError exceptions.
Reviewed-by: coleenp, dholmes
1 /*
2 * Copyright (c) 1997, 2013, 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.
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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.
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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23 */
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 "runtime/fieldDescriptor.hpp"
45 #include "runtime/handles.inline.hpp"
46 #include "runtime/interfaceSupport.hpp"
47 #include "runtime/java.hpp"
48 #include "runtime/javaCalls.hpp"
49 #include "runtime/safepoint.hpp"
50 #include "runtime/thread.inline.hpp"
51 #include "runtime/vframe.hpp"
52 #include "utilities/preserveException.hpp"
54 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
55 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
57 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
58 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
60 InjectedField JavaClasses::_injected_fields[] = {
61 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
62 };
64 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
65 return _injected_fields[id].compute_offset();
66 }
69 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
70 *field_count = 0;
72 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
73 if (sid == vmSymbols::NO_SID) {
74 // Only well known classes can inject fields
75 return NULL;
76 }
78 int count = 0;
79 int start = -1;
81 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
82 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
83 count++; \
84 if (start == -1) start = klass##_##name##_enum; \
85 }
86 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
87 #undef LOOKUP_INJECTED_FIELD
89 if (start != -1) {
90 *field_count = count;
91 return _injected_fields + start;
92 }
93 return NULL;
94 }
97 static bool find_field(InstanceKlass* ik,
98 Symbol* name_symbol, Symbol* signature_symbol,
99 fieldDescriptor* fd,
100 bool allow_super = false) {
101 if (allow_super)
102 return ik->find_field(name_symbol, signature_symbol, fd) != NULL;
103 else
104 return ik->find_local_field(name_symbol, signature_symbol, fd);
105 }
107 // Helpful routine for computing field offsets at run time rather than hardcoding them
108 static void
109 compute_offset(int &dest_offset,
110 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
111 bool allow_super = false) {
112 fieldDescriptor fd;
113 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
114 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
115 ResourceMark rm;
116 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
117 #ifndef PRODUCT
118 klass_oop->print();
119 tty->print_cr("all fields:");
120 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
121 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
122 }
123 #endif //PRODUCT
124 fatal("Invalid layout of preloaded class");
125 }
126 dest_offset = fd.offset();
127 }
129 // Same as above but for "optional" offsets that might not be present in certain JDK versions
130 static void
131 compute_optional_offset(int& dest_offset,
132 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
133 bool allow_super = false) {
134 fieldDescriptor fd;
135 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
136 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
137 dest_offset = fd.offset();
138 }
139 }
142 int java_lang_String::value_offset = 0;
143 int java_lang_String::offset_offset = 0;
144 int java_lang_String::count_offset = 0;
145 int java_lang_String::hash_offset = 0;
147 bool java_lang_String::initialized = false;
149 void java_lang_String::compute_offsets() {
150 assert(!initialized, "offsets should be initialized only once");
152 Klass* k = SystemDictionary::String_klass();
153 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature());
154 compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature());
155 compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature());
156 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature());
158 initialized = true;
159 }
161 Handle java_lang_String::basic_create(int length, TRAPS) {
162 assert(initialized, "Must be initialized");
163 // Create the String object first, so there's a chance that the String
164 // and the char array it points to end up in the same cache line.
165 oop obj;
166 obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH);
168 // Create the char array. The String object must be handlized here
169 // because GC can happen as a result of the allocation attempt.
170 Handle h_obj(THREAD, obj);
171 typeArrayOop buffer;
172 buffer = oopFactory::new_charArray(length, CHECK_NH);
174 // Point the String at the char array
175 obj = h_obj();
176 set_value(obj, buffer);
177 // No need to zero the offset, allocation zero'ed the entire String object
178 assert(offset(obj) == 0, "initial String offset should be zero");
179 //set_offset(obj, 0);
180 set_count(obj, length);
182 return h_obj;
183 }
185 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
186 Handle h_obj = basic_create(length, CHECK_NH);
187 typeArrayOop buffer = value(h_obj());
188 for (int index = 0; index < length; index++) {
189 buffer->char_at_put(index, unicode[index]);
190 }
191 return h_obj;
192 }
194 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
195 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
196 return h_obj();
197 }
199 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
200 if (utf8_str == NULL) {
201 return Handle();
202 }
203 int length = UTF8::unicode_length(utf8_str);
204 Handle h_obj = basic_create(length, CHECK_NH);
205 if (length > 0) {
206 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
207 }
208 return h_obj;
209 }
211 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
212 Handle h_obj = create_from_str(utf8_str, CHECK_0);
213 return h_obj();
214 }
216 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
217 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
218 Handle h_obj = basic_create(length, CHECK_NH);
219 if (length > 0) {
220 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
221 }
222 return h_obj;
223 }
225 // Converts a C string to a Java String based on current encoding
226 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
227 assert(str != NULL, "bad arguments");
229 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
230 static to_java_string_fn_t _to_java_string_fn = NULL;
232 if (_to_java_string_fn == NULL) {
233 void *lib_handle = os::native_java_library();
234 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
235 if (_to_java_string_fn == NULL) {
236 fatal("NewStringPlatform missing");
237 }
238 }
240 jstring js = NULL;
241 { JavaThread* thread = (JavaThread*)THREAD;
242 assert(thread->is_Java_thread(), "must be java thread");
243 HandleMark hm(thread);
244 ThreadToNativeFromVM ttn(thread);
245 js = (_to_java_string_fn)(thread->jni_environment(), str);
246 }
247 return Handle(THREAD, JNIHandles::resolve(js));
248 }
250 // Converts a Java String to a native C string that can be used for
251 // native OS calls.
252 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
254 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
255 static to_platform_string_fn_t _to_platform_string_fn = NULL;
257 if (_to_platform_string_fn == NULL) {
258 void *lib_handle = os::native_java_library();
259 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
260 if (_to_platform_string_fn == NULL) {
261 fatal("GetStringPlatformChars missing");
262 }
263 }
265 char *native_platform_string;
266 { JavaThread* thread = (JavaThread*)THREAD;
267 assert(thread->is_Java_thread(), "must be java thread");
268 JNIEnv *env = thread->jni_environment();
269 jstring js = (jstring) JNIHandles::make_local(env, java_string());
270 bool is_copy;
271 HandleMark hm(thread);
272 ThreadToNativeFromVM ttn(thread);
273 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
274 assert(is_copy == JNI_TRUE, "is_copy value changed");
275 JNIHandles::destroy_local(js);
276 }
277 return native_platform_string;
278 }
280 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
281 oop obj = java_string();
282 // Typical usage is to convert all '/' to '.' in string.
283 typeArrayOop value = java_lang_String::value(obj);
284 int offset = java_lang_String::offset(obj);
285 int length = java_lang_String::length(obj);
287 // First check if any from_char exist
288 int index; // Declared outside, used later
289 for (index = 0; index < length; index++) {
290 if (value->char_at(index + offset) == from_char) {
291 break;
292 }
293 }
294 if (index == length) {
295 // No from_char, so do not copy.
296 return java_string;
297 }
299 // Create new UNICODE buffer. Must handlize value because GC
300 // may happen during String and char array creation.
301 typeArrayHandle h_value(THREAD, value);
302 Handle string = basic_create(length, CHECK_NH);
304 typeArrayOop from_buffer = h_value();
305 typeArrayOop to_buffer = java_lang_String::value(string());
307 // Copy contents
308 for (index = 0; index < length; index++) {
309 jchar c = from_buffer->char_at(index + offset);
310 if (c == from_char) {
311 c = to_char;
312 }
313 to_buffer->char_at_put(index, c);
314 }
315 return string;
316 }
318 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
319 typeArrayOop value = java_lang_String::value(java_string);
320 int offset = java_lang_String::offset(java_string);
321 length = java_lang_String::length(java_string);
323 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
324 if (result != NULL) {
325 for (int index = 0; index < length; index++) {
326 result[index] = value->char_at(index + offset);
327 }
328 } else {
329 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
330 }
331 return result;
332 }
334 unsigned int java_lang_String::hash_code(oop java_string) {
335 int length = java_lang_String::length(java_string);
336 // Zero length string will hash to zero with String.hashCode() function.
337 if (length == 0) return 0;
339 typeArrayOop value = java_lang_String::value(java_string);
340 int offset = java_lang_String::offset(java_string);
341 return java_lang_String::hash_code(value->char_at_addr(offset), length);
342 }
344 char* java_lang_String::as_quoted_ascii(oop java_string) {
345 typeArrayOop value = java_lang_String::value(java_string);
346 int offset = java_lang_String::offset(java_string);
347 int length = java_lang_String::length(java_string);
349 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
350 if (base == NULL) return NULL;
352 int result_length = UNICODE::quoted_ascii_length(base, length) + 1;
353 char* result = NEW_RESOURCE_ARRAY(char, result_length);
354 UNICODE::as_quoted_ascii(base, length, result, result_length);
355 assert(result_length >= length + 1, "must not be shorter");
356 assert(result_length == (int)strlen(result) + 1, "must match");
357 return result;
358 }
360 unsigned int java_lang_String::hash_string(oop java_string) {
361 int length = java_lang_String::length(java_string);
362 // Zero length string doesn't hash necessarily hash to zero.
363 if (length == 0) {
364 return StringTable::hash_string(NULL, 0);
365 }
367 typeArrayOop value = java_lang_String::value(java_string);
368 int offset = java_lang_String::offset(java_string);
369 return StringTable::hash_string(value->char_at_addr(offset), length);
370 }
372 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {
373 oop obj = java_string();
374 typeArrayOop value = java_lang_String::value(obj);
375 int offset = java_lang_String::offset(obj);
376 int length = java_lang_String::length(obj);
377 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
378 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
379 return sym;
380 }
382 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
383 typeArrayOop value = java_lang_String::value(java_string);
384 int offset = java_lang_String::offset(java_string);
385 int length = java_lang_String::length(java_string);
386 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
387 return SymbolTable::probe_unicode(base, length);
388 }
391 int java_lang_String::utf8_length(oop java_string) {
392 typeArrayOop value = java_lang_String::value(java_string);
393 int offset = java_lang_String::offset(java_string);
394 int length = java_lang_String::length(java_string);
395 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
396 return UNICODE::utf8_length(position, length);
397 }
399 char* java_lang_String::as_utf8_string(oop java_string) {
400 typeArrayOop value = java_lang_String::value(java_string);
401 int offset = java_lang_String::offset(java_string);
402 int length = java_lang_String::length(java_string);
403 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
404 return UNICODE::as_utf8(position, length);
405 }
407 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
408 typeArrayOop value = java_lang_String::value(java_string);
409 int offset = java_lang_String::offset(java_string);
410 int length = java_lang_String::length(java_string);
411 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
412 return UNICODE::as_utf8(position, length, buf, buflen);
413 }
415 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
416 typeArrayOop value = java_lang_String::value(java_string);
417 int offset = java_lang_String::offset(java_string);
418 int length = java_lang_String::length(java_string);
419 assert(start + len <= length, "just checking");
420 jchar* position = value->char_at_addr(offset + start);
421 return UNICODE::as_utf8(position, len);
422 }
424 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
425 assert(java_string->klass() == SystemDictionary::String_klass(),
426 "must be java_string");
427 typeArrayOop value = java_lang_String::value(java_string);
428 int offset = java_lang_String::offset(java_string);
429 int length = java_lang_String::length(java_string);
430 if (length != len) {
431 return false;
432 }
433 for (int i = 0; i < len; i++) {
434 if (value->char_at(i + offset) != chars[i]) {
435 return false;
436 }
437 }
438 return true;
439 }
441 void java_lang_String::print(Handle java_string, outputStream* st) {
442 oop obj = java_string();
443 assert(obj->klass() == SystemDictionary::String_klass(), "must be java_string");
444 typeArrayOop value = java_lang_String::value(obj);
445 int offset = java_lang_String::offset(obj);
446 int length = java_lang_String::length(obj);
448 int end = MIN2(length, 100);
449 if (value == NULL) {
450 // This can happen if, e.g., printing a String
451 // object before its initializer has been called
452 st->print_cr("NULL");
453 } else {
454 st->print("\"");
455 for (int index = 0; index < length; index++) {
456 st->print("%c", value->char_at(index + offset));
457 }
458 st->print("\"");
459 }
460 }
462 static void initialize_static_field(fieldDescriptor* fd, TRAPS) {
463 Handle mirror (THREAD, fd->field_holder()->java_mirror());
464 assert(mirror.not_null() && fd->is_static(), "just checking");
465 if (fd->has_initial_value()) {
466 BasicType t = fd->field_type();
467 switch (t) {
468 case T_BYTE:
469 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
470 break;
471 case T_BOOLEAN:
472 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
473 break;
474 case T_CHAR:
475 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
476 break;
477 case T_SHORT:
478 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
479 break;
480 case T_INT:
481 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
482 break;
483 case T_FLOAT:
484 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
485 break;
486 case T_DOUBLE:
487 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
488 break;
489 case T_LONG:
490 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
491 break;
492 case T_OBJECT:
493 {
494 #ifdef ASSERT
495 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
496 assert(fd->signature() == sym, "just checking");
497 #endif
498 oop string = fd->string_initial_value(CHECK);
499 mirror()->obj_field_put(fd->offset(), string);
500 }
501 break;
502 default:
503 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
504 "Illegal ConstantValue attribute in class file");
505 }
506 }
507 }
510 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) {
511 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
513 // If the offset was read from the shared archive, it was fixed up already
514 if (!k->is_shared()) {
515 if (k->oop_is_instance()) {
516 // During bootstrap, java.lang.Class wasn't loaded so static field
517 // offsets were computed without the size added it. Go back and
518 // update all the static field offsets to included the size.
519 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) {
520 if (fs.access_flags().is_static()) {
521 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
522 fs.set_offset(real_offset);
523 }
524 }
525 }
526 }
527 create_mirror(k, CHECK);
528 }
530 oop java_lang_Class::create_mirror(KlassHandle k, TRAPS) {
531 assert(k->java_mirror() == NULL, "should only assign mirror once");
532 // Use this moment of initialization to cache modifier_flags also,
533 // to support Class.getModifiers(). Instance classes recalculate
534 // the cached flags after the class file is parsed, but before the
535 // class is put into the system dictionary.
536 int computed_modifiers = k->compute_modifier_flags(CHECK_0);
537 k->set_modifier_flags(computed_modifiers);
538 // Class_klass has to be loaded because it is used to allocate
539 // the mirror.
540 if (SystemDictionary::Class_klass_loaded()) {
541 // Allocate mirror (java.lang.Class instance)
542 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK_0);
544 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
545 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
547 // It might also have a component mirror. This mirror must already exist.
548 if (k->oop_is_array()) {
549 Handle comp_mirror;
550 if (k->oop_is_typeArray()) {
551 BasicType type = TypeArrayKlass::cast(k())->element_type();
552 comp_mirror = Universe::java_mirror(type);
553 } else {
554 assert(k->oop_is_objArray(), "Must be");
555 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass();
556 assert(element_klass != NULL, "Must have an element klass");
557 comp_mirror = element_klass->java_mirror();
558 }
559 assert(comp_mirror.not_null(), "must have a mirror");
561 // Two-way link between the array klass and its component mirror:
562 ArrayKlass::cast(k())->set_component_mirror(comp_mirror());
563 set_array_klass(comp_mirror(), k());
564 } else {
565 assert(k->oop_is_instance(), "Must be");
566 // Initialize static fields
567 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, CHECK_NULL);
568 }
569 return mirror();
570 } else {
571 if (fixup_mirror_list() == NULL) {
572 GrowableArray<Klass*>* list =
573 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
574 set_fixup_mirror_list(list);
575 }
576 fixup_mirror_list()->push(k());
577 return NULL;
578 }
579 }
583 int java_lang_Class::oop_size(oop java_class) {
584 assert(_oop_size_offset != 0, "must be set");
585 return java_class->int_field(_oop_size_offset);
586 }
587 void java_lang_Class::set_oop_size(oop java_class, int size) {
588 assert(_oop_size_offset != 0, "must be set");
589 java_class->int_field_put(_oop_size_offset, size);
590 }
591 int java_lang_Class::static_oop_field_count(oop java_class) {
592 assert(_static_oop_field_count_offset != 0, "must be set");
593 return java_class->int_field(_static_oop_field_count_offset);
594 }
595 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
596 assert(_static_oop_field_count_offset != 0, "must be set");
597 java_class->int_field_put(_static_oop_field_count_offset, size);
598 }
600 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
601 // This should be improved by adding a field at the Java level or by
602 // introducing a new VM klass (see comment in ClassFileParser)
603 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
604 if (type != T_VOID) {
605 Klass* aklass = Universe::typeArrayKlassObj(type);
606 assert(aklass != NULL, "correct bootstrap");
607 set_array_klass(java_class, aklass);
608 }
609 #ifdef ASSERT
610 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
611 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
612 #endif
613 return java_class;
614 }
617 Klass* java_lang_Class::as_Klass(oop java_class) {
618 //%note memory_2
619 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
620 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
621 assert(k == NULL || k->is_klass(), "type check");
622 return k;
623 }
626 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
627 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
628 java_class->metadata_field_put(_klass_offset, klass);
629 }
632 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
633 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
634 Symbol* name = NULL;
635 bool is_instance = false;
636 if (is_primitive(java_class)) {
637 name = vmSymbols::type_signature(primitive_type(java_class));
638 } else {
639 Klass* k = as_Klass(java_class);
640 is_instance = k->oop_is_instance();
641 name = k->name();
642 }
643 if (name == NULL) {
644 st->print("<null>");
645 return;
646 }
647 if (is_instance) st->print("L");
648 st->write((char*) name->base(), (int) name->utf8_length());
649 if (is_instance) st->print(";");
650 }
652 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
653 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
654 Symbol* name;
655 if (is_primitive(java_class)) {
656 name = vmSymbols::type_signature(primitive_type(java_class));
657 // Because this can create a new symbol, the caller has to decrement
658 // the refcount, so make adjustment here and below for symbols returned
659 // that are not created or incremented due to a successful lookup.
660 name->increment_refcount();
661 } else {
662 Klass* k = as_Klass(java_class);
663 if (!k->oop_is_instance()) {
664 name = k->name();
665 name->increment_refcount();
666 } else {
667 ResourceMark rm;
668 const char* sigstr = k->signature_name();
669 int siglen = (int) strlen(sigstr);
670 if (!intern_if_not_found) {
671 name = SymbolTable::probe(sigstr, siglen);
672 } else {
673 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
674 }
675 }
676 }
677 return name;
678 }
681 Klass* java_lang_Class::array_klass(oop java_class) {
682 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
683 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass");
684 return k;
685 }
688 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
689 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass");
690 java_class->metadata_field_put(_array_klass_offset, klass);
691 }
694 bool java_lang_Class::is_primitive(oop java_class) {
695 // should assert:
696 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
697 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
699 #ifdef ASSERT
700 if (is_primitive) {
701 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
702 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
703 "Should be either the T_VOID primitive or a java primitive");
704 }
705 #endif
707 return is_primitive;
708 }
711 BasicType java_lang_Class::primitive_type(oop java_class) {
712 assert(java_lang_Class::is_primitive(java_class), "just checking");
713 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
714 BasicType type = T_VOID;
715 if (ak != NULL) {
716 // Note: create_basic_type_mirror above initializes ak to a non-null value.
717 type = ArrayKlass::cast(ak)->element_type();
718 } else {
719 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
720 }
721 assert(Universe::java_mirror(type) == java_class, "must be consistent");
722 return type;
723 }
725 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
726 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
727 if (is_primitive(java_class)) {
728 if (reference_klass != NULL)
729 (*reference_klass) = NULL;
730 return primitive_type(java_class);
731 } else {
732 if (reference_klass != NULL)
733 (*reference_klass) = as_Klass(java_class);
734 return T_OBJECT;
735 }
736 }
739 oop java_lang_Class::primitive_mirror(BasicType t) {
740 oop mirror = Universe::java_mirror(t);
741 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
742 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
743 return mirror;
744 }
746 bool java_lang_Class::offsets_computed = false;
747 int java_lang_Class::classRedefinedCount_offset = -1;
749 void java_lang_Class::compute_offsets() {
750 assert(!offsets_computed, "offsets should be initialized only once");
751 offsets_computed = true;
753 Klass* klass_oop = SystemDictionary::Class_klass();
754 // The classRedefinedCount field is only present starting in 1.5,
755 // so don't go fatal.
756 compute_optional_offset(classRedefinedCount_offset,
757 klass_oop, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
759 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
760 }
762 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
763 if (!JDK_Version::is_gte_jdk15x_version()
764 || classRedefinedCount_offset == -1) {
765 // The classRedefinedCount field is only present starting in 1.5.
766 // If we don't have an offset for it then just return -1 as a marker.
767 return -1;
768 }
770 return the_class_mirror->int_field(classRedefinedCount_offset);
771 }
773 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
774 if (!JDK_Version::is_gte_jdk15x_version()
775 || classRedefinedCount_offset == -1) {
776 // The classRedefinedCount field is only present starting in 1.5.
777 // If we don't have an offset for it then nothing to set.
778 return;
779 }
781 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
782 }
785 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
786 // platform thread structure, and a eetop offset which was used for thread
787 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
788 // merged, so in the HotSpot VM we just use the eetop field for the thread
789 // instead of the privateInfo_offset.
790 //
791 // Note: The stackSize field is only present starting in 1.4.
793 int java_lang_Thread::_name_offset = 0;
794 int java_lang_Thread::_group_offset = 0;
795 int java_lang_Thread::_contextClassLoader_offset = 0;
796 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
797 int java_lang_Thread::_priority_offset = 0;
798 int java_lang_Thread::_eetop_offset = 0;
799 int java_lang_Thread::_daemon_offset = 0;
800 int java_lang_Thread::_stillborn_offset = 0;
801 int java_lang_Thread::_stackSize_offset = 0;
802 int java_lang_Thread::_tid_offset = 0;
803 int java_lang_Thread::_thread_status_offset = 0;
804 int java_lang_Thread::_park_blocker_offset = 0;
805 int java_lang_Thread::_park_event_offset = 0 ;
808 void java_lang_Thread::compute_offsets() {
809 assert(_group_offset == 0, "offsets should be initialized only once");
811 Klass* k = SystemDictionary::Thread_klass();
812 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature());
813 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
814 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
815 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
816 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
817 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
818 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
819 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
820 // The stackSize field is only present starting in 1.4, so don't go fatal.
821 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
822 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
823 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
824 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
825 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
826 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
827 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
828 vmSymbols::long_signature());
829 }
832 JavaThread* java_lang_Thread::thread(oop java_thread) {
833 return (JavaThread*)java_thread->address_field(_eetop_offset);
834 }
837 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
838 java_thread->address_field_put(_eetop_offset, (address)thread);
839 }
842 typeArrayOop java_lang_Thread::name(oop java_thread) {
843 oop name = java_thread->obj_field(_name_offset);
844 assert(name == NULL || (name->is_typeArray() && TypeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking");
845 return typeArrayOop(name);
846 }
849 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) {
850 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL");
851 java_thread->obj_field_put(_name_offset, name);
852 }
855 ThreadPriority java_lang_Thread::priority(oop java_thread) {
856 return (ThreadPriority)java_thread->int_field(_priority_offset);
857 }
860 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
861 java_thread->int_field_put(_priority_offset, priority);
862 }
865 oop java_lang_Thread::threadGroup(oop java_thread) {
866 return java_thread->obj_field(_group_offset);
867 }
870 bool java_lang_Thread::is_stillborn(oop java_thread) {
871 return java_thread->bool_field(_stillborn_offset) != 0;
872 }
875 // We never have reason to turn the stillborn bit off
876 void java_lang_Thread::set_stillborn(oop java_thread) {
877 java_thread->bool_field_put(_stillborn_offset, true);
878 }
881 bool java_lang_Thread::is_alive(oop java_thread) {
882 JavaThread* thr = java_lang_Thread::thread(java_thread);
883 return (thr != NULL);
884 }
887 bool java_lang_Thread::is_daemon(oop java_thread) {
888 return java_thread->bool_field(_daemon_offset) != 0;
889 }
892 void java_lang_Thread::set_daemon(oop java_thread) {
893 java_thread->bool_field_put(_daemon_offset, true);
894 }
896 oop java_lang_Thread::context_class_loader(oop java_thread) {
897 return java_thread->obj_field(_contextClassLoader_offset);
898 }
900 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
901 return java_thread->obj_field(_inheritedAccessControlContext_offset);
902 }
905 jlong java_lang_Thread::stackSize(oop java_thread) {
906 // The stackSize field is only present starting in 1.4
907 if (_stackSize_offset > 0) {
908 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check");
909 return java_thread->long_field(_stackSize_offset);
910 } else {
911 return 0;
912 }
913 }
915 // Write the thread status value to threadStatus field in java.lang.Thread java class.
916 void java_lang_Thread::set_thread_status(oop java_thread,
917 java_lang_Thread::ThreadStatus status) {
918 // The threadStatus is only present starting in 1.5
919 if (_thread_status_offset > 0) {
920 java_thread->int_field_put(_thread_status_offset, status);
921 }
922 }
924 // Read thread status value from threadStatus field in java.lang.Thread java class.
925 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
926 assert(Thread::current()->is_VM_thread() ||
927 JavaThread::current()->thread_state() == _thread_in_vm,
928 "Java Thread is not running in vm");
929 // The threadStatus is only present starting in 1.5
930 if (_thread_status_offset > 0) {
931 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
932 } else {
933 // All we can easily figure out is if it is alive, but that is
934 // enough info for a valid unknown status.
935 // These aren't restricted to valid set ThreadStatus values, so
936 // use JVMTI values and cast.
937 JavaThread* thr = java_lang_Thread::thread(java_thread);
938 if (thr == NULL) {
939 // the thread hasn't run yet or is in the process of exiting
940 return NEW;
941 }
942 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
943 }
944 }
947 jlong java_lang_Thread::thread_id(oop java_thread) {
948 // The thread ID field is only present starting in 1.5
949 if (_tid_offset > 0) {
950 return java_thread->long_field(_tid_offset);
951 } else {
952 return 0;
953 }
954 }
956 oop java_lang_Thread::park_blocker(oop java_thread) {
957 assert(JDK_Version::current().supports_thread_park_blocker() &&
958 _park_blocker_offset != 0, "Must support parkBlocker field");
960 if (_park_blocker_offset > 0) {
961 return java_thread->obj_field(_park_blocker_offset);
962 }
964 return NULL;
965 }
967 jlong java_lang_Thread::park_event(oop java_thread) {
968 if (_park_event_offset > 0) {
969 return java_thread->long_field(_park_event_offset);
970 }
971 return 0;
972 }
974 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
975 if (_park_event_offset > 0) {
976 java_thread->long_field_put(_park_event_offset, ptr);
977 return true;
978 }
979 return false;
980 }
983 const char* java_lang_Thread::thread_status_name(oop java_thread) {
984 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status");
985 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
986 switch (status) {
987 case NEW : return "NEW";
988 case RUNNABLE : return "RUNNABLE";
989 case SLEEPING : return "TIMED_WAITING (sleeping)";
990 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
991 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
992 case PARKED : return "WAITING (parking)";
993 case PARKED_TIMED : return "TIMED_WAITING (parking)";
994 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
995 case TERMINATED : return "TERMINATED";
996 default : return "UNKNOWN";
997 };
998 }
999 int java_lang_ThreadGroup::_parent_offset = 0;
1000 int java_lang_ThreadGroup::_name_offset = 0;
1001 int java_lang_ThreadGroup::_threads_offset = 0;
1002 int java_lang_ThreadGroup::_groups_offset = 0;
1003 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1004 int java_lang_ThreadGroup::_destroyed_offset = 0;
1005 int java_lang_ThreadGroup::_daemon_offset = 0;
1006 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
1007 int java_lang_ThreadGroup::_nthreads_offset = 0;
1008 int java_lang_ThreadGroup::_ngroups_offset = 0;
1010 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1011 assert(java_thread_group->is_oop(), "thread group must be oop");
1012 return java_thread_group->obj_field(_parent_offset);
1013 }
1015 // ("name as oop" accessor is not necessary)
1017 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
1018 oop name = java_thread_group->obj_field(_name_offset);
1019 // ThreadGroup.name can be null
1020 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
1021 }
1023 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1024 assert(java_thread_group->is_oop(), "thread group must be oop");
1025 return java_thread_group->int_field(_nthreads_offset);
1026 }
1028 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1029 oop threads = java_thread_group->obj_field(_threads_offset);
1030 assert(threads != NULL, "threadgroups should have threads");
1031 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1032 return objArrayOop(threads);
1033 }
1035 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1036 assert(java_thread_group->is_oop(), "thread group must be oop");
1037 return java_thread_group->int_field(_ngroups_offset);
1038 }
1040 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1041 oop groups = java_thread_group->obj_field(_groups_offset);
1042 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1043 return objArrayOop(groups);
1044 }
1046 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1047 assert(java_thread_group->is_oop(), "thread group must be oop");
1048 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1049 }
1051 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1052 assert(java_thread_group->is_oop(), "thread group must be oop");
1053 return java_thread_group->bool_field(_destroyed_offset) != 0;
1054 }
1056 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1057 assert(java_thread_group->is_oop(), "thread group must be oop");
1058 return java_thread_group->bool_field(_daemon_offset) != 0;
1059 }
1061 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1062 assert(java_thread_group->is_oop(), "thread group must be oop");
1063 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1064 }
1066 void java_lang_ThreadGroup::compute_offsets() {
1067 assert(_parent_offset == 0, "offsets should be initialized only once");
1069 Klass* k = SystemDictionary::ThreadGroup_klass();
1071 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1072 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1073 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1074 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1075 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1076 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1077 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1078 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1079 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1080 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1081 }
1083 oop java_lang_Throwable::unassigned_stacktrace() {
1084 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass());
1085 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1086 if (UseCompressedOops) {
1087 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1088 } else {
1089 return oopDesc::load_decode_heap_oop((oop*)addr);
1090 }
1091 }
1093 oop java_lang_Throwable::backtrace(oop throwable) {
1094 return throwable->obj_field_acquire(backtrace_offset);
1095 }
1098 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1099 throwable->release_obj_field_put(backtrace_offset, value);
1100 }
1103 oop java_lang_Throwable::message(oop throwable) {
1104 return throwable->obj_field(detailMessage_offset);
1105 }
1108 oop java_lang_Throwable::message(Handle throwable) {
1109 return throwable->obj_field(detailMessage_offset);
1110 }
1113 void java_lang_Throwable::set_message(oop throwable, oop value) {
1114 throwable->obj_field_put(detailMessage_offset, value);
1115 }
1118 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1119 throwable->obj_field_put(stackTrace_offset, st_element_array);
1120 }
1122 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1123 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1124 set_stacktrace(throwable, NULL);
1125 }
1128 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1129 ResourceMark rm;
1130 Klass* k = throwable->klass();
1131 assert(k != NULL, "just checking");
1132 st->print("%s", InstanceKlass::cast(k)->external_name());
1133 oop msg = message(throwable);
1134 if (msg != NULL) {
1135 st->print(": %s", java_lang_String::as_utf8_string(msg));
1136 }
1137 }
1140 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1141 ResourceMark rm;
1142 Klass* k = throwable->klass();
1143 assert(k != NULL, "just checking");
1144 st->print("%s", InstanceKlass::cast(k)->external_name());
1145 oop msg = message(throwable);
1146 if (msg != NULL) {
1147 st->print(": %s", java_lang_String::as_utf8_string(msg));
1148 }
1149 }
1151 // After this many redefines, the stack trace is unreliable.
1152 const int MAX_VERSION = USHRT_MAX;
1154 // Helper backtrace functions to store bci|version together.
1155 static inline int merge_bci_and_version(int bci, int version) {
1156 // only store u2 for version, checking for overflow.
1157 if (version > USHRT_MAX || version < 0) version = MAX_VERSION;
1158 assert((jushort)bci == bci, "bci should be short");
1159 return build_int_from_shorts(version, bci);
1160 }
1162 static inline int bci_at(unsigned int merged) {
1163 return extract_high_short_from_int(merged);
1164 }
1165 static inline int version_at(unsigned int merged) {
1166 return extract_low_short_from_int(merged);
1167 }
1169 static inline bool version_matches(Method* method, int version) {
1170 return (method->constants()->version() == version && version < MAX_VERSION);
1171 }
1173 static inline int get_line_number(Method* method, int bci) {
1174 int line_number = 0;
1175 if (method->is_native()) {
1176 // Negative value different from -1 below, enabling Java code in
1177 // class java.lang.StackTraceElement to distinguish "native" from
1178 // "no LineNumberTable". JDK tests for -2.
1179 line_number = -2;
1180 } else {
1181 // Returns -1 if no LineNumberTable, and otherwise actual line number
1182 line_number = method->line_number_from_bci(bci);
1183 if (line_number == -1 && ShowHiddenFrames) {
1184 line_number = bci + 1000000;
1185 }
1186 }
1187 return line_number;
1188 }
1190 // This class provides a simple wrapper over the internal structure of
1191 // exception backtrace to insulate users of the backtrace from needing
1192 // to know what it looks like.
1193 class BacktraceBuilder: public StackObj {
1194 private:
1195 Handle _backtrace;
1196 objArrayOop _head;
1197 typeArrayOop _methods;
1198 typeArrayOop _bcis;
1199 objArrayOop _mirrors;
1200 int _index;
1201 No_Safepoint_Verifier _nsv;
1203 public:
1205 enum {
1206 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1207 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1208 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1209 trace_next_offset = java_lang_Throwable::trace_next_offset,
1210 trace_size = java_lang_Throwable::trace_size,
1211 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1212 };
1214 // get info out of chunks
1215 static typeArrayOop get_methods(objArrayHandle chunk) {
1216 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1217 assert(methods != NULL, "method array should be initialized in backtrace");
1218 return methods;
1219 }
1220 static typeArrayOop get_bcis(objArrayHandle chunk) {
1221 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1222 assert(bcis != NULL, "bci array should be initialized in backtrace");
1223 return bcis;
1224 }
1225 static objArrayOop get_mirrors(objArrayHandle chunk) {
1226 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1227 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1228 return mirrors;
1229 }
1231 // constructor for new backtrace
1232 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL) {
1233 expand(CHECK);
1234 _backtrace = _head;
1235 _index = 0;
1236 }
1238 BacktraceBuilder(objArrayHandle backtrace) {
1239 _methods = get_methods(backtrace);
1240 _bcis = get_bcis(backtrace);
1241 _mirrors = get_mirrors(backtrace);
1242 assert(_methods->length() == _bcis->length() &&
1243 _methods->length() == _mirrors->length(),
1244 "method and source information arrays should match");
1246 // head is the preallocated backtrace
1247 _backtrace = _head = backtrace();
1248 _index = 0;
1249 }
1251 void expand(TRAPS) {
1252 objArrayHandle old_head(THREAD, _head);
1253 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1255 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1256 objArrayHandle new_head(THREAD, head);
1258 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1259 typeArrayHandle new_methods(THREAD, methods);
1261 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1262 typeArrayHandle new_bcis(THREAD, bcis);
1264 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1265 objArrayHandle new_mirrors(THREAD, mirrors);
1267 if (!old_head.is_null()) {
1268 old_head->obj_at_put(trace_next_offset, new_head());
1269 }
1270 new_head->obj_at_put(trace_methods_offset, new_methods());
1271 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1272 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1274 _head = new_head();
1275 _methods = new_methods();
1276 _bcis = new_bcis();
1277 _mirrors = new_mirrors();
1278 _index = 0;
1279 }
1281 oop backtrace() {
1282 return _backtrace();
1283 }
1285 inline void push(Method* method, int bci, TRAPS) {
1286 // Smear the -1 bci to 0 since the array only holds unsigned
1287 // shorts. The later line number lookup would just smear the -1
1288 // to a 0 even if it could be recorded.
1289 if (bci == SynchronizationEntryBCI) bci = 0;
1291 if (_index >= trace_chunk_size) {
1292 methodHandle mhandle(THREAD, method);
1293 expand(CHECK);
1294 method = mhandle();
1295 }
1297 _methods->short_at_put(_index, method->method_idnum());
1298 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version()));
1300 // We need to save the mirrors in the backtrace to keep the class
1301 // from being unloaded while we still have this stack trace.
1302 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1303 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1304 _index++;
1305 }
1307 };
1309 // Print stack trace element to resource allocated buffer
1310 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
1311 int method_id, int version, int bci) {
1313 // Get strings and string lengths
1314 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1315 const char* klass_name = holder->external_name();
1316 int buf_len = (int)strlen(klass_name);
1318 // pushing to the stack trace added one.
1319 Method* method = holder->method_with_idnum(method_id);
1320 char* method_name = method->name()->as_C_string();
1321 buf_len += (int)strlen(method_name);
1323 char* source_file_name = NULL;
1324 if (version_matches(method, version)) {
1325 Symbol* source = holder->source_file_name();
1326 if (source != NULL) {
1327 source_file_name = source->as_C_string();
1328 buf_len += (int)strlen(source_file_name);
1329 }
1330 }
1332 // Allocate temporary buffer with extra space for formatting and line number
1333 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1335 // Print stack trace line in buffer
1336 sprintf(buf, "\tat %s.%s", klass_name, method_name);
1338 if (!version_matches(method, version)) {
1339 strcat(buf, "(Redefined)");
1340 } else {
1341 int line_number = get_line_number(method, bci);
1342 if (line_number == -2) {
1343 strcat(buf, "(Native Method)");
1344 } else {
1345 if (source_file_name != NULL && (line_number != -1)) {
1346 // Sourcename and linenumber
1347 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1348 } else if (source_file_name != NULL) {
1349 // Just sourcename
1350 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1351 } else {
1352 // Neither sourcename nor linenumber
1353 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1354 }
1355 nmethod* nm = method->code();
1356 if (WizardMode && nm != NULL) {
1357 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1358 }
1359 }
1360 }
1362 return buf;
1363 }
1365 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror,
1366 int method_id, int version, int bci) {
1367 ResourceMark rm;
1368 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci);
1369 st->print_cr("%s", buf);
1370 }
1372 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) {
1373 Handle mirror = method->method_holder()->java_mirror();
1374 int method_id = method->method_idnum();
1375 int version = method->constants()->version();
1376 print_stack_element(st, mirror, method_id, version, bci);
1377 }
1379 const char* java_lang_Throwable::no_stack_trace_message() {
1380 return "\t<<no stack trace available>>";
1381 }
1384 // Currently used only for exceptions occurring during startup
1385 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1386 Thread *THREAD = Thread::current();
1387 Handle h_throwable(THREAD, throwable);
1388 while (h_throwable.not_null()) {
1389 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1390 if (result.is_null()) {
1391 st->print_cr(no_stack_trace_message());
1392 return;
1393 }
1395 while (result.not_null()) {
1397 // Get method id, bci, version and mirror from chunk
1398 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result));
1399 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result));
1400 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result));
1402 int length = methods()->length();
1403 for (int index = 0; index < length; index++) {
1404 Handle mirror(THREAD, mirrors->obj_at(index));
1405 // NULL mirror means end of stack trace
1406 if (mirror.is_null()) goto handle_cause;
1407 int method = methods->short_at(index);
1408 int version = version_at(bcis->int_at(index));
1409 int bci = bci_at(bcis->int_at(index));
1410 print_stack_element(st, mirror, method, version, bci);
1411 }
1412 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1413 }
1414 handle_cause:
1415 {
1416 EXCEPTION_MARK;
1417 JavaValue cause(T_OBJECT);
1418 JavaCalls::call_virtual(&cause,
1419 h_throwable,
1420 KlassHandle(THREAD, h_throwable->klass()),
1421 vmSymbols::getCause_name(),
1422 vmSymbols::void_throwable_signature(),
1423 THREAD);
1424 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1425 if (HAS_PENDING_EXCEPTION) {
1426 CLEAR_PENDING_EXCEPTION;
1427 h_throwable = Handle();
1428 } else {
1429 h_throwable = Handle(THREAD, (oop) cause.get_jobject());
1430 if (h_throwable.not_null()) {
1431 st->print("Caused by: ");
1432 print(h_throwable, st);
1433 st->cr();
1434 }
1435 }
1436 }
1437 }
1438 }
1440 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) {
1441 if (!StackTraceInThrowable) return;
1442 ResourceMark rm(THREAD);
1444 // Start out by clearing the backtrace for this object, in case the VM
1445 // runs out of memory while allocating the stack trace
1446 set_backtrace(throwable(), NULL);
1447 if (JDK_Version::is_gte_jdk14x_version()) {
1448 // New since 1.4, clear lazily constructed Java level stacktrace if
1449 // refilling occurs
1450 // This is unnecessary in 1.7+ but harmless
1451 clear_stacktrace(throwable());
1452 }
1454 int max_depth = MaxJavaStackTraceDepth;
1455 JavaThread* thread = (JavaThread*)THREAD;
1456 BacktraceBuilder bt(CHECK);
1458 // If there is no Java frame just return the method that was being called
1459 // with bci 0
1460 if (!thread->has_last_Java_frame()) {
1461 if (max_depth >= 1 && method() != NULL) {
1462 bt.push(method(), 0, CHECK);
1463 set_backtrace(throwable(), bt.backtrace());
1464 }
1465 return;
1466 }
1468 // Instead of using vframe directly, this version of fill_in_stack_trace
1469 // basically handles everything by hand. This significantly improved the
1470 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1471 // See bug 6333838 for more details.
1472 // The "ASSERT" here is to verify this method generates the exactly same stack
1473 // trace as utilizing vframe.
1474 #ifdef ASSERT
1475 vframeStream st(thread);
1476 methodHandle st_method(THREAD, st.method());
1477 #endif
1478 int total_count = 0;
1479 RegisterMap map(thread, false);
1480 int decode_offset = 0;
1481 nmethod* nm = NULL;
1482 bool skip_fillInStackTrace_check = false;
1483 bool skip_throwableInit_check = false;
1484 bool skip_hidden = !ShowHiddenFrames;
1486 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1487 Method* method = NULL;
1488 int bci = 0;
1490 // Compiled java method case.
1491 if (decode_offset != 0) {
1492 DebugInfoReadStream stream(nm, decode_offset);
1493 decode_offset = stream.read_int();
1494 method = (Method*)nm->metadata_at(stream.read_int());
1495 bci = stream.read_bci();
1496 } else {
1497 if (fr.is_first_frame()) break;
1498 address pc = fr.pc();
1499 if (fr.is_interpreted_frame()) {
1500 intptr_t bcx = fr.interpreter_frame_bcx();
1501 method = fr.interpreter_frame_method();
1502 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
1503 fr = fr.sender(&map);
1504 } else {
1505 CodeBlob* cb = fr.cb();
1506 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1507 // but non nmethod
1508 fr = fr.sender(&map);
1509 if (cb == NULL || !cb->is_nmethod()) {
1510 continue;
1511 }
1512 nm = (nmethod*)cb;
1513 if (nm->method()->is_native()) {
1514 method = nm->method();
1515 bci = 0;
1516 } else {
1517 PcDesc* pd = nm->pc_desc_at(pc);
1518 decode_offset = pd->scope_decode_offset();
1519 // if decode_offset is not equal to 0, it will execute the
1520 // "compiled java method case" at the beginning of the loop.
1521 continue;
1522 }
1523 }
1524 }
1525 #ifdef ASSERT
1526 assert(st_method() == method && st.bci() == bci,
1527 "Wrong stack trace");
1528 st.next();
1529 // vframeStream::method isn't GC-safe so store off a copy
1530 // of the Method* in case we GC.
1531 if (!st.at_end()) {
1532 st_method = st.method();
1533 }
1534 #endif
1536 // the format of the stacktrace will be:
1537 // - 1 or more fillInStackTrace frames for the exception class (skipped)
1538 // - 0 or more <init> methods for the exception class (skipped)
1539 // - rest of the stack
1541 if (!skip_fillInStackTrace_check) {
1542 if ((method->name() == vmSymbols::fillInStackTrace_name() ||
1543 method->name() == vmSymbols::fillInStackTrace0_name()) &&
1544 throwable->is_a(method->method_holder())) {
1545 continue;
1546 }
1547 else {
1548 skip_fillInStackTrace_check = true; // gone past them all
1549 }
1550 }
1551 if (!skip_throwableInit_check) {
1552 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1554 // skip <init> methods of the exception class and superclasses
1555 // This is simlar to classic VM.
1556 if (method->name() == vmSymbols::object_initializer_name() &&
1557 throwable->is_a(method->method_holder())) {
1558 continue;
1559 } else {
1560 // there are none or we've seen them all - either way stop checking
1561 skip_throwableInit_check = true;
1562 }
1563 }
1564 if (method->is_hidden()) {
1565 if (skip_hidden) continue;
1566 }
1567 bt.push(method, bci, CHECK);
1568 total_count++;
1569 }
1571 // Put completed stack trace into throwable object
1572 set_backtrace(throwable(), bt.backtrace());
1573 }
1575 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) {
1576 // No-op if stack trace is disabled
1577 if (!StackTraceInThrowable) {
1578 return;
1579 }
1581 // Disable stack traces for some preallocated out of memory errors
1582 if (!Universe::should_fill_in_stack_trace(throwable)) {
1583 return;
1584 }
1586 PRESERVE_EXCEPTION_MARK;
1588 JavaThread* thread = JavaThread::active();
1589 fill_in_stack_trace(throwable, method, thread);
1590 // ignore exceptions thrown during stack trace filling
1591 CLEAR_PENDING_EXCEPTION;
1592 }
1594 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1595 // Allocate stack trace - backtrace is created but not filled in
1597 // No-op if stack trace is disabled
1598 if (!StackTraceInThrowable) return;
1599 BacktraceBuilder bt(CHECK); // creates a backtrace
1600 set_backtrace(throwable(), bt.backtrace());
1601 }
1604 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1605 // Fill in stack trace into preallocated backtrace (no GC)
1607 // No-op if stack trace is disabled
1608 if (!StackTraceInThrowable) return;
1610 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1612 JavaThread* THREAD = JavaThread::current();
1614 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
1615 assert(backtrace.not_null(), "backtrace should have been preallocated");
1617 ResourceMark rm(THREAD);
1618 vframeStream st(THREAD);
1620 BacktraceBuilder bt(backtrace);
1622 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1623 // methods as preallocated errors aren't created by "java" code.
1625 // fill in as much stack trace as possible
1626 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace);
1627 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1628 int chunk_count = 0;
1630 for (;!st.at_end(); st.next()) {
1631 bt.push(st.method(), st.bci(), CHECK);
1632 chunk_count++;
1634 // Bail-out for deep stacks
1635 if (chunk_count >= max_chunks) break;
1636 }
1638 // For Java 7+ we support the Throwable immutability protocol defined for Java 7. This support
1639 // was missing in 7u0 so in 7u0 there is a workaround in the Throwable class. That workaround
1640 // can be removed in a JDK using this JVM version
1641 if (JDK_Version::is_gte_jdk17x_version()) {
1642 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
1643 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
1644 }
1645 }
1648 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1649 if (throwable == NULL) {
1650 THROW_0(vmSymbols::java_lang_NullPointerException());
1651 }
1652 objArrayOop chunk = objArrayOop(backtrace(throwable));
1653 int depth = 0;
1654 if (chunk != NULL) {
1655 // Iterate over chunks and count full ones
1656 while (true) {
1657 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1658 if (next == NULL) break;
1659 depth += trace_chunk_size;
1660 chunk = next;
1661 }
1662 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1663 // Count element in remaining partial chunk. NULL value for mirror
1664 // marks the end of the stack trace elements that are saved.
1665 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1666 assert(mirrors != NULL, "sanity check");
1667 for (int i = 0; i < mirrors->length(); i++) {
1668 if (mirrors->obj_at(i) == NULL) break;
1669 depth++;
1670 }
1671 }
1672 return depth;
1673 }
1676 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1677 if (throwable == NULL) {
1678 THROW_0(vmSymbols::java_lang_NullPointerException());
1679 }
1680 if (index < 0) {
1681 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1682 }
1683 // Compute how many chunks to skip and index into actual chunk
1684 objArrayOop chunk = objArrayOop(backtrace(throwable));
1685 int skip_chunks = index / trace_chunk_size;
1686 int chunk_index = index % trace_chunk_size;
1687 while (chunk != NULL && skip_chunks > 0) {
1688 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1689 skip_chunks--;
1690 }
1691 if (chunk == NULL) {
1692 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1693 }
1694 // Get method id, bci, version and mirror from chunk
1695 typeArrayOop methods = BacktraceBuilder::get_methods(chunk);
1696 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk);
1697 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1699 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check");
1701 int method = methods->short_at(chunk_index);
1702 int version = version_at(bcis->int_at(chunk_index));
1703 int bci = bci_at(bcis->int_at(chunk_index));
1704 Handle mirror(THREAD, mirrors->obj_at(chunk_index));
1706 // Chunk can be partial full
1707 if (mirror.is_null()) {
1708 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1709 }
1711 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, CHECK_0);
1712 return element;
1713 }
1715 oop java_lang_StackTraceElement::create(Handle mirror, int method_id, int version, int bci, TRAPS) {
1716 // Allocate java.lang.StackTraceElement instance
1717 Klass* k = SystemDictionary::StackTraceElement_klass();
1718 assert(k != NULL, "must be loaded in 1.4+");
1719 instanceKlassHandle ik (THREAD, k);
1720 if (ik->should_be_initialized()) {
1721 ik->initialize(CHECK_0);
1722 }
1724 Handle element = ik->allocate_instance_handle(CHECK_0);
1725 // Fill in class name
1726 ResourceMark rm(THREAD);
1727 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1728 const char* str = holder->external_name();
1729 oop classname = StringTable::intern((char*) str, CHECK_0);
1730 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1732 // Fill in method name
1733 Method* method = holder->method_with_idnum(method_id);
1734 oop methodname = StringTable::intern(method->name(), CHECK_0);
1735 java_lang_StackTraceElement::set_methodName(element(), methodname);
1737 if (!version_matches(method, version)) {
1738 // The method was redefined, accurate line number information isn't available
1739 java_lang_StackTraceElement::set_fileName(element(), NULL);
1740 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1741 } else {
1742 // Fill in source file name and line number.
1743 Symbol* source = holder->source_file_name();
1744 if (ShowHiddenFrames && source == NULL)
1745 source = vmSymbols::unknown_class_name();
1746 oop filename = StringTable::intern(source, CHECK_0);
1747 java_lang_StackTraceElement::set_fileName(element(), filename);
1749 int line_number = get_line_number(method, bci);
1750 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1751 }
1752 return element();
1753 }
1755 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1756 Handle mirror (THREAD, method->method_holder()->java_mirror());
1757 int method_id = method->method_idnum();
1758 return create(mirror, method_id, method->constants()->version(), bci, THREAD);
1759 }
1761 void java_lang_reflect_AccessibleObject::compute_offsets() {
1762 Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
1763 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1764 }
1766 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1767 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1768 return (jboolean) reflect->bool_field(override_offset);
1769 }
1771 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1772 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1773 reflect->bool_field_put(override_offset, (int) value);
1774 }
1776 void java_lang_reflect_Method::compute_offsets() {
1777 Klass* k = SystemDictionary::reflect_Method_klass();
1778 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1779 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1780 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1781 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1782 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1783 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1784 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1785 // The generic signature and annotations fields are only present in 1.5
1786 signature_offset = -1;
1787 annotations_offset = -1;
1788 parameter_annotations_offset = -1;
1789 annotation_default_offset = -1;
1790 type_annotations_offset = -1;
1791 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1792 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1793 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1794 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1795 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
1796 }
1798 Handle java_lang_reflect_Method::create(TRAPS) {
1799 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1800 Klass* klass = SystemDictionary::reflect_Method_klass();
1801 // This class is eagerly initialized during VM initialization, since we keep a refence
1802 // to one of the methods
1803 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
1804 return InstanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH);
1805 }
1807 oop java_lang_reflect_Method::clazz(oop reflect) {
1808 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1809 return reflect->obj_field(clazz_offset);
1810 }
1812 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1813 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1814 reflect->obj_field_put(clazz_offset, value);
1815 }
1817 int java_lang_reflect_Method::slot(oop reflect) {
1818 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1819 return reflect->int_field(slot_offset);
1820 }
1822 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1823 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1824 reflect->int_field_put(slot_offset, value);
1825 }
1827 oop java_lang_reflect_Method::name(oop method) {
1828 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1829 return method->obj_field(name_offset);
1830 }
1832 void java_lang_reflect_Method::set_name(oop method, oop value) {
1833 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1834 method->obj_field_put(name_offset, value);
1835 }
1837 oop java_lang_reflect_Method::return_type(oop method) {
1838 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1839 return method->obj_field(returnType_offset);
1840 }
1842 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
1843 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1844 method->obj_field_put(returnType_offset, value);
1845 }
1847 oop java_lang_reflect_Method::parameter_types(oop method) {
1848 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1849 return method->obj_field(parameterTypes_offset);
1850 }
1852 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
1853 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1854 method->obj_field_put(parameterTypes_offset, value);
1855 }
1857 oop java_lang_reflect_Method::exception_types(oop method) {
1858 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1859 return method->obj_field(exceptionTypes_offset);
1860 }
1862 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
1863 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1864 method->obj_field_put(exceptionTypes_offset, value);
1865 }
1867 int java_lang_reflect_Method::modifiers(oop method) {
1868 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1869 return method->int_field(modifiers_offset);
1870 }
1872 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
1873 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1874 method->int_field_put(modifiers_offset, value);
1875 }
1877 bool java_lang_reflect_Method::has_signature_field() {
1878 return (signature_offset >= 0);
1879 }
1881 oop java_lang_reflect_Method::signature(oop method) {
1882 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1883 assert(has_signature_field(), "signature field must be present");
1884 return method->obj_field(signature_offset);
1885 }
1887 void java_lang_reflect_Method::set_signature(oop method, oop value) {
1888 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1889 assert(has_signature_field(), "signature field must be present");
1890 method->obj_field_put(signature_offset, value);
1891 }
1893 bool java_lang_reflect_Method::has_annotations_field() {
1894 return (annotations_offset >= 0);
1895 }
1897 oop java_lang_reflect_Method::annotations(oop method) {
1898 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1899 assert(has_annotations_field(), "annotations field must be present");
1900 return method->obj_field(annotations_offset);
1901 }
1903 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
1904 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1905 assert(has_annotations_field(), "annotations field must be present");
1906 method->obj_field_put(annotations_offset, value);
1907 }
1909 bool java_lang_reflect_Method::has_parameter_annotations_field() {
1910 return (parameter_annotations_offset >= 0);
1911 }
1913 oop java_lang_reflect_Method::parameter_annotations(oop method) {
1914 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1915 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1916 return method->obj_field(parameter_annotations_offset);
1917 }
1919 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
1920 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1921 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1922 method->obj_field_put(parameter_annotations_offset, value);
1923 }
1925 bool java_lang_reflect_Method::has_annotation_default_field() {
1926 return (annotation_default_offset >= 0);
1927 }
1929 oop java_lang_reflect_Method::annotation_default(oop method) {
1930 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1931 assert(has_annotation_default_field(), "annotation default field must be present");
1932 return method->obj_field(annotation_default_offset);
1933 }
1935 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
1936 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1937 assert(has_annotation_default_field(), "annotation default field must be present");
1938 method->obj_field_put(annotation_default_offset, value);
1939 }
1941 bool java_lang_reflect_Method::has_type_annotations_field() {
1942 return (type_annotations_offset >= 0);
1943 }
1945 oop java_lang_reflect_Method::type_annotations(oop method) {
1946 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1947 assert(has_type_annotations_field(), "type_annotations field must be present");
1948 return method->obj_field(type_annotations_offset);
1949 }
1951 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
1952 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1953 assert(has_type_annotations_field(), "type_annotations field must be present");
1954 method->obj_field_put(type_annotations_offset, value);
1955 }
1957 void java_lang_reflect_Constructor::compute_offsets() {
1958 Klass* k = SystemDictionary::reflect_Constructor_klass();
1959 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1960 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1961 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1962 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1963 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1964 // The generic signature and annotations fields are only present in 1.5
1965 signature_offset = -1;
1966 annotations_offset = -1;
1967 parameter_annotations_offset = -1;
1968 type_annotations_offset = -1;
1969 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1970 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1971 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1972 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
1973 }
1975 Handle java_lang_reflect_Constructor::create(TRAPS) {
1976 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1977 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
1978 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
1979 instanceKlassHandle klass (THREAD, k);
1980 // Ensure it is initialized
1981 klass->initialize(CHECK_NH);
1982 return klass->allocate_instance_handle(CHECK_NH);
1983 }
1985 oop java_lang_reflect_Constructor::clazz(oop reflect) {
1986 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1987 return reflect->obj_field(clazz_offset);
1988 }
1990 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
1991 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1992 reflect->obj_field_put(clazz_offset, value);
1993 }
1995 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
1996 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1997 return constructor->obj_field(parameterTypes_offset);
1998 }
2000 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2001 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2002 constructor->obj_field_put(parameterTypes_offset, value);
2003 }
2005 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2006 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2007 return constructor->obj_field(exceptionTypes_offset);
2008 }
2010 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2011 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2012 constructor->obj_field_put(exceptionTypes_offset, value);
2013 }
2015 int java_lang_reflect_Constructor::slot(oop reflect) {
2016 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2017 return reflect->int_field(slot_offset);
2018 }
2020 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2021 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2022 reflect->int_field_put(slot_offset, value);
2023 }
2025 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2026 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2027 return constructor->int_field(modifiers_offset);
2028 }
2030 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2031 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2032 constructor->int_field_put(modifiers_offset, value);
2033 }
2035 bool java_lang_reflect_Constructor::has_signature_field() {
2036 return (signature_offset >= 0);
2037 }
2039 oop java_lang_reflect_Constructor::signature(oop constructor) {
2040 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2041 assert(has_signature_field(), "signature field must be present");
2042 return constructor->obj_field(signature_offset);
2043 }
2045 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2046 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2047 assert(has_signature_field(), "signature field must be present");
2048 constructor->obj_field_put(signature_offset, value);
2049 }
2051 bool java_lang_reflect_Constructor::has_annotations_field() {
2052 return (annotations_offset >= 0);
2053 }
2055 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2056 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2057 assert(has_annotations_field(), "annotations field must be present");
2058 return constructor->obj_field(annotations_offset);
2059 }
2061 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2062 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2063 assert(has_annotations_field(), "annotations field must be present");
2064 constructor->obj_field_put(annotations_offset, value);
2065 }
2067 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2068 return (parameter_annotations_offset >= 0);
2069 }
2071 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2072 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2073 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2074 return method->obj_field(parameter_annotations_offset);
2075 }
2077 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2078 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2079 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2080 method->obj_field_put(parameter_annotations_offset, value);
2081 }
2083 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2084 return (type_annotations_offset >= 0);
2085 }
2087 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2088 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2089 assert(has_type_annotations_field(), "type_annotations field must be present");
2090 return constructor->obj_field(type_annotations_offset);
2091 }
2093 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2094 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2095 assert(has_type_annotations_field(), "type_annotations field must be present");
2096 constructor->obj_field_put(type_annotations_offset, value);
2097 }
2099 void java_lang_reflect_Field::compute_offsets() {
2100 Klass* k = SystemDictionary::reflect_Field_klass();
2101 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2102 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2103 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
2104 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2105 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2106 // The generic signature and annotations fields are only present in 1.5
2107 signature_offset = -1;
2108 annotations_offset = -1;
2109 type_annotations_offset = -1;
2110 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2111 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2112 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2113 }
2115 Handle java_lang_reflect_Field::create(TRAPS) {
2116 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2117 Symbol* name = vmSymbols::java_lang_reflect_Field();
2118 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2119 instanceKlassHandle klass (THREAD, k);
2120 // Ensure it is initialized
2121 klass->initialize(CHECK_NH);
2122 return klass->allocate_instance_handle(CHECK_NH);
2123 }
2125 oop java_lang_reflect_Field::clazz(oop reflect) {
2126 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2127 return reflect->obj_field(clazz_offset);
2128 }
2130 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2131 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2132 reflect->obj_field_put(clazz_offset, value);
2133 }
2135 oop java_lang_reflect_Field::name(oop field) {
2136 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2137 return field->obj_field(name_offset);
2138 }
2140 void java_lang_reflect_Field::set_name(oop field, oop value) {
2141 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2142 field->obj_field_put(name_offset, value);
2143 }
2145 oop java_lang_reflect_Field::type(oop field) {
2146 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2147 return field->obj_field(type_offset);
2148 }
2150 void java_lang_reflect_Field::set_type(oop field, oop value) {
2151 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2152 field->obj_field_put(type_offset, value);
2153 }
2155 int java_lang_reflect_Field::slot(oop reflect) {
2156 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2157 return reflect->int_field(slot_offset);
2158 }
2160 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2161 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2162 reflect->int_field_put(slot_offset, value);
2163 }
2165 int java_lang_reflect_Field::modifiers(oop field) {
2166 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2167 return field->int_field(modifiers_offset);
2168 }
2170 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2171 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2172 field->int_field_put(modifiers_offset, value);
2173 }
2175 bool java_lang_reflect_Field::has_signature_field() {
2176 return (signature_offset >= 0);
2177 }
2179 oop java_lang_reflect_Field::signature(oop field) {
2180 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2181 assert(has_signature_field(), "signature field must be present");
2182 return field->obj_field(signature_offset);
2183 }
2185 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2186 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2187 assert(has_signature_field(), "signature field must be present");
2188 field->obj_field_put(signature_offset, value);
2189 }
2191 bool java_lang_reflect_Field::has_annotations_field() {
2192 return (annotations_offset >= 0);
2193 }
2195 oop java_lang_reflect_Field::annotations(oop field) {
2196 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2197 assert(has_annotations_field(), "annotations field must be present");
2198 return field->obj_field(annotations_offset);
2199 }
2201 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2202 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2203 assert(has_annotations_field(), "annotations field must be present");
2204 field->obj_field_put(annotations_offset, value);
2205 }
2207 bool java_lang_reflect_Field::has_type_annotations_field() {
2208 return (type_annotations_offset >= 0);
2209 }
2211 oop java_lang_reflect_Field::type_annotations(oop field) {
2212 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2213 assert(has_type_annotations_field(), "type_annotations field must be present");
2214 return field->obj_field(type_annotations_offset);
2215 }
2217 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2218 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2219 assert(has_type_annotations_field(), "type_annotations field must be present");
2220 field->obj_field_put(type_annotations_offset, value);
2221 }
2223 void sun_reflect_ConstantPool::compute_offsets() {
2224 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2225 // This null test can be removed post beta
2226 if (k != NULL) {
2227 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2228 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2229 }
2230 }
2232 void java_lang_reflect_Parameter::compute_offsets() {
2233 Klass* k = SystemDictionary::reflect_Parameter_klass();
2234 if(NULL != k) {
2235 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2236 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2237 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature());
2238 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature());
2239 }
2240 }
2242 Handle java_lang_reflect_Parameter::create(TRAPS) {
2243 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2244 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2245 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2246 instanceKlassHandle klass (THREAD, k);
2247 // Ensure it is initialized
2248 klass->initialize(CHECK_NH);
2249 return klass->allocate_instance_handle(CHECK_NH);
2250 }
2252 oop java_lang_reflect_Parameter::name(oop param) {
2253 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2254 return param->obj_field(name_offset);
2255 }
2257 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2258 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2259 param->obj_field_put(name_offset, value);
2260 }
2262 int java_lang_reflect_Parameter::modifiers(oop param) {
2263 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2264 return param->int_field(modifiers_offset);
2265 }
2267 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2268 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2269 param->int_field_put(modifiers_offset, value);
2270 }
2272 int java_lang_reflect_Parameter::index(oop param) {
2273 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2274 return param->int_field(index_offset);
2275 }
2277 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2278 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2279 param->int_field_put(index_offset, value);
2280 }
2282 oop java_lang_reflect_Parameter::executable(oop param) {
2283 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2284 return param->obj_field(executable_offset);
2285 }
2287 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2288 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2289 param->obj_field_put(executable_offset, value);
2290 }
2293 Handle sun_reflect_ConstantPool::create(TRAPS) {
2294 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2295 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2296 instanceKlassHandle klass (THREAD, k);
2297 // Ensure it is initialized
2298 klass->initialize(CHECK_NH);
2299 return klass->allocate_instance_handle(CHECK_NH);
2300 }
2303 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2304 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2305 oop mirror = value->pool_holder()->java_mirror();
2306 // Save the mirror to get back the constant pool.
2307 reflect->obj_field_put(_oop_offset, mirror);
2308 }
2310 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) {
2311 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2313 oop mirror = reflect->obj_field(_oop_offset);
2314 Klass* k = java_lang_Class::as_Klass(mirror);
2315 assert(k->oop_is_instance(), "Must be");
2317 // Get the constant pool back from the klass. Since class redefinition
2318 // merges the new constant pool into the old, this is essentially the
2319 // same constant pool as the original. If constant pool merging is
2320 // no longer done in the future, this will have to change to save
2321 // the original.
2322 return InstanceKlass::cast(k)->constants();
2323 }
2325 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2326 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2327 // This null test can be removed post beta
2328 if (k != NULL) {
2329 compute_offset(_base_offset, k,
2330 vmSymbols::base_name(), vmSymbols::object_signature());
2331 }
2332 }
2334 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2335 Klass* k = SystemDictionary::box_klass(type);
2336 if (k == NULL) return NULL;
2337 instanceKlassHandle h (THREAD, k);
2338 if (!h->is_initialized()) h->initialize(CHECK_0);
2339 return h->allocate_instance(THREAD);
2340 }
2343 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2344 oop box = initialize_and_allocate(type, CHECK_0);
2345 if (box == NULL) return NULL;
2346 switch (type) {
2347 case T_BOOLEAN:
2348 box->bool_field_put(value_offset, value->z);
2349 break;
2350 case T_CHAR:
2351 box->char_field_put(value_offset, value->c);
2352 break;
2353 case T_FLOAT:
2354 box->float_field_put(value_offset, value->f);
2355 break;
2356 case T_DOUBLE:
2357 box->double_field_put(long_value_offset, value->d);
2358 break;
2359 case T_BYTE:
2360 box->byte_field_put(value_offset, value->b);
2361 break;
2362 case T_SHORT:
2363 box->short_field_put(value_offset, value->s);
2364 break;
2365 case T_INT:
2366 box->int_field_put(value_offset, value->i);
2367 break;
2368 case T_LONG:
2369 box->long_field_put(long_value_offset, value->j);
2370 break;
2371 default:
2372 return NULL;
2373 }
2374 return box;
2375 }
2378 BasicType java_lang_boxing_object::basic_type(oop box) {
2379 if (box == NULL) return T_ILLEGAL;
2380 BasicType type = SystemDictionary::box_klass_type(box->klass());
2381 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2382 return T_ILLEGAL;
2383 return type;
2384 }
2387 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2388 BasicType type = SystemDictionary::box_klass_type(box->klass());
2389 switch (type) {
2390 case T_BOOLEAN:
2391 value->z = box->bool_field(value_offset);
2392 break;
2393 case T_CHAR:
2394 value->c = box->char_field(value_offset);
2395 break;
2396 case T_FLOAT:
2397 value->f = box->float_field(value_offset);
2398 break;
2399 case T_DOUBLE:
2400 value->d = box->double_field(long_value_offset);
2401 break;
2402 case T_BYTE:
2403 value->b = box->byte_field(value_offset);
2404 break;
2405 case T_SHORT:
2406 value->s = box->short_field(value_offset);
2407 break;
2408 case T_INT:
2409 value->i = box->int_field(value_offset);
2410 break;
2411 case T_LONG:
2412 value->j = box->long_field(long_value_offset);
2413 break;
2414 default:
2415 return T_ILLEGAL;
2416 } // end switch
2417 return type;
2418 }
2421 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2422 BasicType type = SystemDictionary::box_klass_type(box->klass());
2423 switch (type) {
2424 case T_BOOLEAN:
2425 box->bool_field_put(value_offset, value->z);
2426 break;
2427 case T_CHAR:
2428 box->char_field_put(value_offset, value->c);
2429 break;
2430 case T_FLOAT:
2431 box->float_field_put(value_offset, value->f);
2432 break;
2433 case T_DOUBLE:
2434 box->double_field_put(long_value_offset, value->d);
2435 break;
2436 case T_BYTE:
2437 box->byte_field_put(value_offset, value->b);
2438 break;
2439 case T_SHORT:
2440 box->short_field_put(value_offset, value->s);
2441 break;
2442 case T_INT:
2443 box->int_field_put(value_offset, value->i);
2444 break;
2445 case T_LONG:
2446 box->long_field_put(long_value_offset, value->j);
2447 break;
2448 default:
2449 return T_ILLEGAL;
2450 } // end switch
2451 return type;
2452 }
2455 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2456 switch (type) {
2457 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2458 case T_CHAR: st->print("%d", value->c); break;
2459 case T_BYTE: st->print("%d", value->b); break;
2460 case T_SHORT: st->print("%d", value->s); break;
2461 case T_INT: st->print("%d", value->i); break;
2462 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2463 case T_FLOAT: st->print("%f", value->f); break;
2464 case T_DOUBLE: st->print("%lf", value->d); break;
2465 default: st->print("type %d?", type); break;
2466 }
2467 }
2470 // Support for java_lang_ref_Reference
2471 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() {
2472 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2473 address addr = ik->static_field_addr(static_lock_offset);
2474 return (HeapWord*) addr;
2475 }
2477 oop java_lang_ref_Reference::pending_list_lock() {
2478 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2479 address addr = ik->static_field_addr(static_lock_offset);
2480 if (UseCompressedOops) {
2481 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2482 } else {
2483 return oopDesc::load_decode_heap_oop((oop*)addr);
2484 }
2485 }
2487 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2488 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2489 address addr = ik->static_field_addr(static_pending_offset);
2490 // XXX This might not be HeapWord aligned, almost rather be char *.
2491 return (HeapWord*)addr;
2492 }
2494 oop java_lang_ref_Reference::pending_list() {
2495 char *addr = (char *)pending_list_addr();
2496 if (UseCompressedOops) {
2497 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2498 } else {
2499 return oopDesc::load_decode_heap_oop((oop*)addr);
2500 }
2501 }
2504 // Support for java_lang_ref_SoftReference
2506 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2507 return ref->long_field(timestamp_offset);
2508 }
2510 jlong java_lang_ref_SoftReference::clock() {
2511 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2512 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2513 return *offset;
2514 }
2516 void java_lang_ref_SoftReference::set_clock(jlong value) {
2517 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2518 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2519 *offset = value;
2520 }
2523 // Support for java_lang_invoke_MethodHandle
2525 int java_lang_invoke_MethodHandle::_type_offset;
2526 int java_lang_invoke_MethodHandle::_form_offset;
2528 int java_lang_invoke_MemberName::_clazz_offset;
2529 int java_lang_invoke_MemberName::_name_offset;
2530 int java_lang_invoke_MemberName::_type_offset;
2531 int java_lang_invoke_MemberName::_flags_offset;
2532 int java_lang_invoke_MemberName::_vmtarget_offset;
2533 int java_lang_invoke_MemberName::_vmloader_offset;
2534 int java_lang_invoke_MemberName::_vmindex_offset;
2536 int java_lang_invoke_LambdaForm::_vmentry_offset;
2538 void java_lang_invoke_MethodHandle::compute_offsets() {
2539 Klass* klass_oop = SystemDictionary::MethodHandle_klass();
2540 if (klass_oop != NULL && EnableInvokeDynamic) {
2541 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
2542 compute_optional_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
2543 if (_form_offset == 0) {
2544 EnableInvokeDynamic = false;
2545 }
2546 }
2547 }
2549 void java_lang_invoke_MemberName::compute_offsets() {
2550 Klass* klass_oop = SystemDictionary::MemberName_klass();
2551 if (klass_oop != NULL && EnableInvokeDynamic) {
2552 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature());
2553 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature());
2554 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature());
2555 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature());
2556 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2557 }
2558 }
2560 void java_lang_invoke_LambdaForm::compute_offsets() {
2561 Klass* klass_oop = SystemDictionary::LambdaForm_klass();
2562 if (klass_oop != NULL && EnableInvokeDynamic) {
2563 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2564 }
2565 }
2567 oop java_lang_invoke_MethodHandle::type(oop mh) {
2568 return mh->obj_field(_type_offset);
2569 }
2571 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
2572 mh->obj_field_put(_type_offset, mtype);
2573 }
2575 oop java_lang_invoke_MethodHandle::form(oop mh) {
2576 assert(_form_offset != 0, "");
2577 return mh->obj_field(_form_offset);
2578 }
2580 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
2581 assert(_form_offset != 0, "");
2582 mh->obj_field_put(_form_offset, lform);
2583 }
2585 /// MemberName accessors
2587 oop java_lang_invoke_MemberName::clazz(oop mname) {
2588 assert(is_instance(mname), "wrong type");
2589 return mname->obj_field(_clazz_offset);
2590 }
2592 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
2593 assert(is_instance(mname), "wrong type");
2594 mname->obj_field_put(_clazz_offset, clazz);
2595 }
2597 oop java_lang_invoke_MemberName::name(oop mname) {
2598 assert(is_instance(mname), "wrong type");
2599 return mname->obj_field(_name_offset);
2600 }
2602 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
2603 assert(is_instance(mname), "wrong type");
2604 mname->obj_field_put(_name_offset, name);
2605 }
2607 oop java_lang_invoke_MemberName::type(oop mname) {
2608 assert(is_instance(mname), "wrong type");
2609 return mname->obj_field(_type_offset);
2610 }
2612 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
2613 assert(is_instance(mname), "wrong type");
2614 mname->obj_field_put(_type_offset, type);
2615 }
2617 int java_lang_invoke_MemberName::flags(oop mname) {
2618 assert(is_instance(mname), "wrong type");
2619 return mname->int_field(_flags_offset);
2620 }
2622 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
2623 assert(is_instance(mname), "wrong type");
2624 mname->int_field_put(_flags_offset, flags);
2625 }
2627 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
2628 assert(is_instance(mname), "wrong type");
2629 return (Metadata*)mname->address_field(_vmtarget_offset);
2630 }
2632 #if INCLUDE_JVMTI
2633 // Can be executed on VM thread only
2634 void java_lang_invoke_MemberName::adjust_vmtarget(oop mname, Metadata* ref) {
2635 assert((is_instance(mname) && (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0), "wrong type");
2636 assert(Thread::current()->is_VM_thread(), "not VM thread");
2637 mname->address_field_put(_vmtarget_offset, (address)ref);
2638 }
2639 #endif // INCLUDE_JVMTI
2641 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
2642 assert(is_instance(mname), "wrong type");
2643 // check the type of the vmtarget
2644 oop dependency = NULL;
2645 if (ref != NULL) {
2646 switch (flags(mname) & (MN_IS_METHOD |
2647 MN_IS_CONSTRUCTOR |
2648 MN_IS_FIELD)) {
2649 case MN_IS_METHOD:
2650 case MN_IS_CONSTRUCTOR:
2651 assert(ref->is_method(), "should be a method");
2652 dependency = ((Method*)ref)->method_holder()->java_mirror();
2653 break;
2654 case MN_IS_FIELD:
2655 assert(ref->is_klass(), "should be a class");
2656 dependency = ((Klass*)ref)->java_mirror();
2657 break;
2658 default:
2659 ShouldNotReachHere();
2660 }
2661 }
2662 mname->address_field_put(_vmtarget_offset, (address)ref);
2663 // Add a reference to the loader (actually mirror because anonymous classes will not have
2664 // distinct loaders) to ensure the metadata is kept alive
2665 // This mirror may be different than the one in clazz field.
2666 mname->obj_field_put(_vmloader_offset, dependency);
2667 }
2669 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
2670 assert(is_instance(mname), "wrong type");
2671 return (intptr_t) mname->address_field(_vmindex_offset);
2672 }
2674 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
2675 assert(is_instance(mname), "wrong type");
2676 mname->address_field_put(_vmindex_offset, (address) index);
2677 }
2679 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
2680 assert(is_instance(lform), "wrong type");
2681 return lform->obj_field(_vmentry_offset);
2682 }
2685 // Support for java_lang_invoke_MethodType
2687 int java_lang_invoke_MethodType::_rtype_offset;
2688 int java_lang_invoke_MethodType::_ptypes_offset;
2690 void java_lang_invoke_MethodType::compute_offsets() {
2691 Klass* k = SystemDictionary::MethodType_klass();
2692 if (k != NULL) {
2693 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2694 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2695 }
2696 }
2698 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
2699 st->print("(");
2700 objArrayOop pts = ptypes(mt);
2701 for (int i = 0, limit = pts->length(); i < limit; i++) {
2702 java_lang_Class::print_signature(pts->obj_at(i), st);
2703 }
2704 st->print(")");
2705 java_lang_Class::print_signature(rtype(mt), st);
2706 }
2708 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2709 ResourceMark rm;
2710 stringStream buffer(128);
2711 print_signature(mt, &buffer);
2712 const char* sigstr = buffer.base();
2713 int siglen = (int) buffer.size();
2714 Symbol *name;
2715 if (!intern_if_not_found) {
2716 name = SymbolTable::probe(sigstr, siglen);
2717 } else {
2718 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2719 }
2720 return name;
2721 }
2723 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
2724 if (mt1 == mt2)
2725 return true;
2726 if (rtype(mt1) != rtype(mt2))
2727 return false;
2728 if (ptype_count(mt1) != ptype_count(mt2))
2729 return false;
2730 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
2731 if (ptype(mt1, i) != ptype(mt2, i))
2732 return false;
2733 }
2734 return true;
2735 }
2737 oop java_lang_invoke_MethodType::rtype(oop mt) {
2738 assert(is_instance(mt), "must be a MethodType");
2739 return mt->obj_field(_rtype_offset);
2740 }
2742 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
2743 assert(is_instance(mt), "must be a MethodType");
2744 return (objArrayOop) mt->obj_field(_ptypes_offset);
2745 }
2747 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
2748 return ptypes(mt)->obj_at(idx);
2749 }
2751 int java_lang_invoke_MethodType::ptype_count(oop mt) {
2752 return ptypes(mt)->length();
2753 }
2755 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
2756 objArrayOop pts = ptypes(mt);
2757 int count = pts->length();
2758 int slots = 0;
2759 for (int i = 0; i < count; i++) {
2760 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
2761 slots += type2size[bt];
2762 }
2763 return slots;
2764 }
2766 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
2767 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
2768 return type2size[bt];
2769 }
2772 // Support for java_lang_invoke_CallSite
2774 int java_lang_invoke_CallSite::_target_offset;
2776 void java_lang_invoke_CallSite::compute_offsets() {
2777 if (!EnableInvokeDynamic) return;
2778 Klass* k = SystemDictionary::CallSite_klass();
2779 if (k != NULL) {
2780 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
2781 }
2782 }
2785 // Support for java_security_AccessControlContext
2787 int java_security_AccessControlContext::_context_offset = 0;
2788 int java_security_AccessControlContext::_privilegedContext_offset = 0;
2789 int java_security_AccessControlContext::_isPrivileged_offset = 0;
2791 void java_security_AccessControlContext::compute_offsets() {
2792 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
2793 fieldDescriptor fd;
2794 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass());
2796 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
2797 fatal("Invalid layout of java.security.AccessControlContext");
2798 }
2799 _context_offset = fd.offset();
2801 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
2802 fatal("Invalid layout of java.security.AccessControlContext");
2803 }
2804 _privilegedContext_offset = fd.offset();
2806 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
2807 fatal("Invalid layout of java.security.AccessControlContext");
2808 }
2809 _isPrivileged_offset = fd.offset();
2810 }
2813 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
2814 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
2815 // Ensure klass is initialized
2816 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
2817 // Allocate result
2818 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
2819 // Fill in values
2820 result->obj_field_put(_context_offset, context());
2821 result->obj_field_put(_privilegedContext_offset, privileged_context());
2822 result->bool_field_put(_isPrivileged_offset, isPrivileged);
2823 return result;
2824 }
2827 // Support for java_lang_ClassLoader
2829 bool java_lang_ClassLoader::offsets_computed = false;
2830 int java_lang_ClassLoader::_loader_data_offset = -1;
2831 int java_lang_ClassLoader::parallelCapable_offset = -1;
2833 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
2834 assert(loader != NULL && loader->is_oop(), "loader must be oop");
2835 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
2836 }
2838 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
2839 return *java_lang_ClassLoader::loader_data_addr(loader);
2840 }
2842 void java_lang_ClassLoader::compute_offsets() {
2843 assert(!offsets_computed, "offsets should be initialized only once");
2844 offsets_computed = true;
2846 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
2847 Klass* k1 = SystemDictionary::ClassLoader_klass();
2848 compute_optional_offset(parallelCapable_offset,
2849 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
2851 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2852 }
2854 oop java_lang_ClassLoader::parent(oop loader) {
2855 assert(is_instance(loader), "loader must be oop");
2856 return loader->obj_field(parent_offset);
2857 }
2859 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
2860 assert(is_instance(loader), "loader must be oop");
2861 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
2862 oop acl = loader;
2863 debug_only(jint loop_count = 0);
2864 // This loop taken verbatim from ClassLoader.java:
2865 do {
2866 acl = parent(acl);
2867 if (cl == acl) {
2868 return true;
2869 }
2870 assert(++loop_count > 0, "loop_count overflow");
2871 } while (acl != NULL);
2872 return false;
2873 }
2876 // For class loader classes, parallelCapable defined
2877 // based on non-null field
2878 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
2879 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
2880 if (!JDK_Version::is_gte_jdk17x_version()
2881 || parallelCapable_offset == -1) {
2882 // Default for backward compatibility is false
2883 return false;
2884 }
2885 return (class_loader->obj_field(parallelCapable_offset) != NULL);
2886 }
2888 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
2889 // Fix for 4474172; see evaluation for more details
2890 loader = non_reflection_class_loader(loader);
2892 oop cl = SystemDictionary::java_system_loader();
2893 while(cl != NULL) {
2894 if (cl == loader) return true;
2895 cl = parent(cl);
2896 }
2897 return false;
2898 }
2900 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
2901 if (loader != NULL) {
2902 // See whether this is one of the class loaders associated with
2903 // the generated bytecodes for reflection, and if so, "magically"
2904 // delegate to its parent to prevent class loading from occurring
2905 // in places where applications using reflection didn't expect it.
2906 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
2907 // This might be null in non-1.4 JDKs
2908 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
2909 return parent(loader);
2910 }
2911 }
2912 return loader;
2913 }
2916 // Support for java_lang_System
2917 int java_lang_System::in_offset_in_bytes() {
2918 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
2919 }
2922 int java_lang_System::out_offset_in_bytes() {
2923 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
2924 }
2927 int java_lang_System::err_offset_in_bytes() {
2928 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
2929 }
2933 int java_lang_Class::_klass_offset;
2934 int java_lang_Class::_array_klass_offset;
2935 int java_lang_Class::_oop_size_offset;
2936 int java_lang_Class::_static_oop_field_count_offset;
2937 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
2938 int java_lang_Throwable::backtrace_offset;
2939 int java_lang_Throwable::detailMessage_offset;
2940 int java_lang_Throwable::cause_offset;
2941 int java_lang_Throwable::stackTrace_offset;
2942 int java_lang_Throwable::static_unassigned_stacktrace_offset;
2943 int java_lang_reflect_AccessibleObject::override_offset;
2944 int java_lang_reflect_Method::clazz_offset;
2945 int java_lang_reflect_Method::name_offset;
2946 int java_lang_reflect_Method::returnType_offset;
2947 int java_lang_reflect_Method::parameterTypes_offset;
2948 int java_lang_reflect_Method::exceptionTypes_offset;
2949 int java_lang_reflect_Method::slot_offset;
2950 int java_lang_reflect_Method::modifiers_offset;
2951 int java_lang_reflect_Method::signature_offset;
2952 int java_lang_reflect_Method::annotations_offset;
2953 int java_lang_reflect_Method::parameter_annotations_offset;
2954 int java_lang_reflect_Method::annotation_default_offset;
2955 int java_lang_reflect_Method::type_annotations_offset;
2956 int java_lang_reflect_Constructor::clazz_offset;
2957 int java_lang_reflect_Constructor::parameterTypes_offset;
2958 int java_lang_reflect_Constructor::exceptionTypes_offset;
2959 int java_lang_reflect_Constructor::slot_offset;
2960 int java_lang_reflect_Constructor::modifiers_offset;
2961 int java_lang_reflect_Constructor::signature_offset;
2962 int java_lang_reflect_Constructor::annotations_offset;
2963 int java_lang_reflect_Constructor::parameter_annotations_offset;
2964 int java_lang_reflect_Constructor::type_annotations_offset;
2965 int java_lang_reflect_Field::clazz_offset;
2966 int java_lang_reflect_Field::name_offset;
2967 int java_lang_reflect_Field::type_offset;
2968 int java_lang_reflect_Field::slot_offset;
2969 int java_lang_reflect_Field::modifiers_offset;
2970 int java_lang_reflect_Field::signature_offset;
2971 int java_lang_reflect_Field::annotations_offset;
2972 int java_lang_reflect_Field::type_annotations_offset;
2973 int java_lang_reflect_Parameter::name_offset;
2974 int java_lang_reflect_Parameter::modifiers_offset;
2975 int java_lang_reflect_Parameter::index_offset;
2976 int java_lang_reflect_Parameter::executable_offset;
2977 int java_lang_boxing_object::value_offset;
2978 int java_lang_boxing_object::long_value_offset;
2979 int java_lang_ref_Reference::referent_offset;
2980 int java_lang_ref_Reference::queue_offset;
2981 int java_lang_ref_Reference::next_offset;
2982 int java_lang_ref_Reference::discovered_offset;
2983 int java_lang_ref_Reference::static_lock_offset;
2984 int java_lang_ref_Reference::static_pending_offset;
2985 int java_lang_ref_Reference::number_of_fake_oop_fields;
2986 int java_lang_ref_SoftReference::timestamp_offset;
2987 int java_lang_ref_SoftReference::static_clock_offset;
2988 int java_lang_ClassLoader::parent_offset;
2989 int java_lang_System::static_in_offset;
2990 int java_lang_System::static_out_offset;
2991 int java_lang_System::static_err_offset;
2992 int java_lang_StackTraceElement::declaringClass_offset;
2993 int java_lang_StackTraceElement::methodName_offset;
2994 int java_lang_StackTraceElement::fileName_offset;
2995 int java_lang_StackTraceElement::lineNumber_offset;
2996 int java_lang_AssertionStatusDirectives::classes_offset;
2997 int java_lang_AssertionStatusDirectives::classEnabled_offset;
2998 int java_lang_AssertionStatusDirectives::packages_offset;
2999 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3000 int java_lang_AssertionStatusDirectives::deflt_offset;
3001 int java_nio_Buffer::_limit_offset;
3002 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3003 int sun_reflect_ConstantPool::_oop_offset;
3004 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3007 // Support for java_lang_StackTraceElement
3009 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3010 element->obj_field_put(fileName_offset, value);
3011 }
3013 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3014 element->obj_field_put(declaringClass_offset, value);
3015 }
3017 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3018 element->obj_field_put(methodName_offset, value);
3019 }
3021 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3022 element->int_field_put(lineNumber_offset, value);
3023 }
3026 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3028 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3029 o->obj_field_put(classes_offset, val);
3030 }
3032 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3033 o->obj_field_put(classEnabled_offset, val);
3034 }
3036 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3037 o->obj_field_put(packages_offset, val);
3038 }
3040 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3041 o->obj_field_put(packageEnabled_offset, val);
3042 }
3044 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3045 o->bool_field_put(deflt_offset, val);
3046 }
3049 // Support for intrinsification of java.nio.Buffer.checkIndex
3050 int java_nio_Buffer::limit_offset() {
3051 return _limit_offset;
3052 }
3055 void java_nio_Buffer::compute_offsets() {
3056 Klass* k = SystemDictionary::nio_Buffer_klass();
3057 assert(k != NULL, "must be loaded in 1.4+");
3058 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3059 }
3061 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3062 if (_owner_offset != 0) return;
3064 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
3065 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3066 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3067 compute_offset(_owner_offset, k,
3068 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3069 }
3071 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3072 assert(_owner_offset != 0, "Must be initialized");
3073 return obj->obj_field(_owner_offset);
3074 }
3076 // Compute hard-coded offsets
3077 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3078 // are not available to determine the offset_of_static_fields.
3079 void JavaClasses::compute_hard_coded_offsets() {
3080 const int x = heapOopSize;
3081 const int header = instanceOopDesc::base_offset_in_bytes();
3083 // Throwable Class
3084 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
3085 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3086 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
3087 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3088 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x;
3090 // java_lang_boxing_object
3091 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3092 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3094 // java_lang_ref_Reference:
3095 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3096 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3097 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
3098 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
3099 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
3100 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3101 // Artificial fields for java_lang_ref_Reference
3102 // The first field is for the discovered field added in 1.4
3103 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3105 // java_lang_ref_SoftReference Class
3106 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3107 // Don't multiply static fields because they are always in wordSize units
3108 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3110 // java_lang_ClassLoader
3111 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3113 // java_lang_System
3114 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
3115 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3116 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3118 // java_lang_StackTraceElement
3119 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
3120 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3121 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
3122 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3123 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3124 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3125 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3126 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3127 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3129 }
3132 // Compute non-hard-coded field offsets of all the classes in this file
3133 void JavaClasses::compute_offsets() {
3134 // java_lang_Class::compute_offsets was called earlier in bootstrap
3135 java_lang_ClassLoader::compute_offsets();
3136 java_lang_Thread::compute_offsets();
3137 java_lang_ThreadGroup::compute_offsets();
3138 if (EnableInvokeDynamic) {
3139 java_lang_invoke_MethodHandle::compute_offsets();
3140 java_lang_invoke_MemberName::compute_offsets();
3141 java_lang_invoke_LambdaForm::compute_offsets();
3142 java_lang_invoke_MethodType::compute_offsets();
3143 java_lang_invoke_CallSite::compute_offsets();
3144 }
3145 java_security_AccessControlContext::compute_offsets();
3146 // Initialize reflection classes. The layouts of these classes
3147 // changed with the new reflection implementation in JDK 1.4, and
3148 // since the Universe doesn't know what JDK version it is until this
3149 // point we defer computation of these offsets until now.
3150 java_lang_reflect_AccessibleObject::compute_offsets();
3151 java_lang_reflect_Method::compute_offsets();
3152 java_lang_reflect_Constructor::compute_offsets();
3153 java_lang_reflect_Field::compute_offsets();
3154 if (JDK_Version::is_gte_jdk14x_version()) {
3155 java_nio_Buffer::compute_offsets();
3156 }
3157 if (JDK_Version::is_gte_jdk15x_version()) {
3158 sun_reflect_ConstantPool::compute_offsets();
3159 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3160 }
3161 if (JDK_Version::is_jdk18x_version())
3162 java_lang_reflect_Parameter::compute_offsets();
3164 // generated interpreter code wants to know about the offsets we just computed:
3165 AbstractAssembler::update_delayed_values();
3166 }
3168 #ifndef PRODUCT
3170 // These functions exist to assert the validity of hard-coded field offsets to guard
3171 // against changes in the class files
3173 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3174 EXCEPTION_MARK;
3175 fieldDescriptor fd;
3176 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3177 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3178 instanceKlassHandle h_klass (THREAD, k);
3179 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3180 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3181 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3182 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3183 return false;
3184 }
3185 if (fd.is_static()) {
3186 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3187 return false;
3188 }
3189 if (fd.offset() == hardcoded_offset ) {
3190 return true;
3191 } else {
3192 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3193 klass_name, field_name, hardcoded_offset, fd.offset());
3194 return false;
3195 }
3196 }
3199 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3200 EXCEPTION_MARK;
3201 fieldDescriptor fd;
3202 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3203 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3204 instanceKlassHandle h_klass (THREAD, k);
3205 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3206 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3207 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3208 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3209 return false;
3210 }
3211 if (!fd.is_static()) {
3212 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3213 return false;
3214 }
3215 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3216 return true;
3217 } else {
3218 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());
3219 return false;
3220 }
3221 }
3224 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3225 EXCEPTION_MARK;
3226 fieldDescriptor fd;
3227 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3228 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3229 instanceKlassHandle h_klass (THREAD, k);
3230 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3231 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3232 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3233 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3234 return false;
3235 }
3236 if (!fd.is_static() || !fd.has_initial_value()) {
3237 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3238 return false;
3239 }
3240 if (!fd.initial_value_tag().is_int()) {
3241 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3242 return false;
3243 }
3244 jint field_value = fd.int_initial_value();
3245 if (field_value == hardcoded_constant) {
3246 return true;
3247 } else {
3248 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);
3249 return false;
3250 }
3251 }
3254 // Check the hard-coded field offsets of all the classes in this file
3256 void JavaClasses::check_offsets() {
3257 bool valid = true;
3258 HandleMark hm;
3260 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3261 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3263 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3264 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3266 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3267 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3269 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3270 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3272 // java.lang.String
3274 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3275 if (java_lang_String::has_offset_field()) {
3276 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3277 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3278 }
3279 if (java_lang_String::has_hash_field()) {
3280 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3281 }
3283 // java.lang.Class
3285 // Fake fields
3286 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3287 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3289 // java.lang.Throwable
3291 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3292 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3293 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3294 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3296 // Boxed primitive objects (java_lang_boxing_object)
3298 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3299 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3300 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3301 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3302 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3303 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3304 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3305 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3307 // java.lang.ClassLoader
3309 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3311 // java.lang.System
3313 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3314 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3315 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3317 // java.lang.StackTraceElement
3319 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3320 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3321 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3322 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3324 // java.lang.ref.Reference
3326 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3327 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3328 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3329 // Fake field
3330 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3331 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3332 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3334 // java.lang.ref.SoftReference
3336 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3337 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3339 // java.lang.AssertionStatusDirectives
3340 //
3341 // The CheckAssertionStatusDirectives boolean can be removed from here and
3342 // globals.hpp after the AssertionStatusDirectives class has been integrated
3343 // into merlin "for some time." Without it, the vm will fail with early
3344 // merlin builds.
3346 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) {
3347 const char* nm = "java/lang/AssertionStatusDirectives";
3348 const char* sig = "[Ljava/lang/String;";
3349 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3350 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3351 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3352 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3353 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3354 }
3356 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3357 }
3359 #endif // PRODUCT
3361 int InjectedField::compute_offset() {
3362 Klass* klass_oop = klass();
3363 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3364 if (!may_be_java && !fs.access_flags().is_internal()) {
3365 // Only look at injected fields
3366 continue;
3367 }
3368 if (fs.name() == name() && fs.signature() == signature()) {
3369 return fs.offset();
3370 }
3371 }
3372 ResourceMark rm;
3373 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)" : "");
3374 #ifndef PRODUCT
3375 klass_oop->print();
3376 tty->print_cr("all fields:");
3377 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3378 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
3379 }
3380 #endif //PRODUCT
3381 fatal("Invalid layout of preloaded class");
3382 return -1;
3383 }
3385 void javaClasses_init() {
3386 JavaClasses::compute_offsets();
3387 JavaClasses::check_offsets();
3388 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3389 }