Fri, 26 Sep 2014 17:48:10 -0400
8047125: (ref) More phantom object references
Reviewed-by: mchung, dfuchs, ahgross, jmasa, brutisso, mgerdin
Contributed-by: kim.barrett@oracle.com
1 /*
2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
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 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
56 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
57 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
59 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
60 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
62 InjectedField JavaClasses::_injected_fields[] = {
63 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
64 };
66 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
67 return _injected_fields[id].compute_offset();
68 }
71 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
72 *field_count = 0;
74 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
75 if (sid == vmSymbols::NO_SID) {
76 // Only well known classes can inject fields
77 return NULL;
78 }
80 int count = 0;
81 int start = -1;
83 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
84 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
85 count++; \
86 if (start == -1) start = klass##_##name##_enum; \
87 }
88 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
89 #undef LOOKUP_INJECTED_FIELD
91 if (start != -1) {
92 *field_count = count;
93 return _injected_fields + start;
94 }
95 return NULL;
96 }
99 static bool find_field(InstanceKlass* ik,
100 Symbol* name_symbol, Symbol* signature_symbol,
101 fieldDescriptor* fd,
102 bool allow_super = false) {
103 if (allow_super)
104 return ik->find_field(name_symbol, signature_symbol, fd) != NULL;
105 else
106 return ik->find_local_field(name_symbol, signature_symbol, fd);
107 }
109 // Helpful routine for computing field offsets at run time rather than hardcoding them
110 static void
111 compute_offset(int &dest_offset,
112 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
113 bool allow_super = false) {
114 fieldDescriptor fd;
115 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
116 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
117 ResourceMark rm;
118 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
119 #ifndef PRODUCT
120 klass_oop->print();
121 tty->print_cr("all fields:");
122 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
123 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
124 }
125 #endif //PRODUCT
126 fatal("Invalid layout of preloaded class");
127 }
128 dest_offset = fd.offset();
129 }
131 // Same as above but for "optional" offsets that might not be present in certain JDK versions
132 static void
133 compute_optional_offset(int& dest_offset,
134 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
135 bool allow_super = false) {
136 fieldDescriptor fd;
137 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
138 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
139 dest_offset = fd.offset();
140 }
141 }
144 int java_lang_String::value_offset = 0;
145 int java_lang_String::offset_offset = 0;
146 int java_lang_String::count_offset = 0;
147 int java_lang_String::hash_offset = 0;
149 bool java_lang_String::initialized = false;
151 void java_lang_String::compute_offsets() {
152 assert(!initialized, "offsets should be initialized only once");
154 Klass* k = SystemDictionary::String_klass();
155 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature());
156 compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature());
157 compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature());
158 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature());
160 initialized = true;
161 }
163 Handle java_lang_String::basic_create(int length, TRAPS) {
164 assert(initialized, "Must be initialized");
165 // Create the String object first, so there's a chance that the String
166 // and the char array it points to end up in the same cache line.
167 oop obj;
168 obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH);
170 // Create the char array. The String object must be handlized here
171 // because GC can happen as a result of the allocation attempt.
172 Handle h_obj(THREAD, obj);
173 typeArrayOop buffer;
174 buffer = oopFactory::new_charArray(length, CHECK_NH);
176 // Point the String at the char array
177 obj = h_obj();
178 set_value(obj, buffer);
179 // No need to zero the offset, allocation zero'ed the entire String object
180 assert(offset(obj) == 0, "initial String offset should be zero");
181 //set_offset(obj, 0);
182 set_count(obj, length);
184 return h_obj;
185 }
187 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
188 Handle h_obj = basic_create(length, CHECK_NH);
189 typeArrayOop buffer = value(h_obj());
190 for (int index = 0; index < length; index++) {
191 buffer->char_at_put(index, unicode[index]);
192 }
193 return h_obj;
194 }
196 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
197 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
198 return h_obj();
199 }
201 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
202 if (utf8_str == NULL) {
203 return Handle();
204 }
205 int length = UTF8::unicode_length(utf8_str);
206 Handle h_obj = basic_create(length, CHECK_NH);
207 if (length > 0) {
208 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
209 }
210 return h_obj;
211 }
213 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
214 Handle h_obj = create_from_str(utf8_str, CHECK_0);
215 return h_obj();
216 }
218 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
219 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
220 Handle h_obj = basic_create(length, CHECK_NH);
221 if (length > 0) {
222 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
223 }
224 return h_obj;
225 }
227 // Converts a C string to a Java String based on current encoding
228 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
229 assert(str != NULL, "bad arguments");
231 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
232 static to_java_string_fn_t _to_java_string_fn = NULL;
234 if (_to_java_string_fn == NULL) {
235 void *lib_handle = os::native_java_library();
236 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
237 if (_to_java_string_fn == NULL) {
238 fatal("NewStringPlatform missing");
239 }
240 }
242 jstring js = NULL;
243 { JavaThread* thread = (JavaThread*)THREAD;
244 assert(thread->is_Java_thread(), "must be java thread");
245 HandleMark hm(thread);
246 ThreadToNativeFromVM ttn(thread);
247 js = (_to_java_string_fn)(thread->jni_environment(), str);
248 }
249 return Handle(THREAD, JNIHandles::resolve(js));
250 }
252 // Converts a Java String to a native C string that can be used for
253 // native OS calls.
254 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
256 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
257 static to_platform_string_fn_t _to_platform_string_fn = NULL;
259 if (_to_platform_string_fn == NULL) {
260 void *lib_handle = os::native_java_library();
261 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
262 if (_to_platform_string_fn == NULL) {
263 fatal("GetStringPlatformChars missing");
264 }
265 }
267 char *native_platform_string;
268 { JavaThread* thread = (JavaThread*)THREAD;
269 assert(thread->is_Java_thread(), "must be java thread");
270 JNIEnv *env = thread->jni_environment();
271 jstring js = (jstring) JNIHandles::make_local(env, java_string());
272 bool is_copy;
273 HandleMark hm(thread);
274 ThreadToNativeFromVM ttn(thread);
275 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
276 assert(is_copy == JNI_TRUE, "is_copy value changed");
277 JNIHandles::destroy_local(js);
278 }
279 return native_platform_string;
280 }
282 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
283 oop obj = java_string();
284 // Typical usage is to convert all '/' to '.' in string.
285 typeArrayOop value = java_lang_String::value(obj);
286 int offset = java_lang_String::offset(obj);
287 int length = java_lang_String::length(obj);
289 // First check if any from_char exist
290 int index; // Declared outside, used later
291 for (index = 0; index < length; index++) {
292 if (value->char_at(index + offset) == from_char) {
293 break;
294 }
295 }
296 if (index == length) {
297 // No from_char, so do not copy.
298 return java_string;
299 }
301 // Create new UNICODE buffer. Must handlize value because GC
302 // may happen during String and char array creation.
303 typeArrayHandle h_value(THREAD, value);
304 Handle string = basic_create(length, CHECK_NH);
306 typeArrayOop from_buffer = h_value();
307 typeArrayOop to_buffer = java_lang_String::value(string());
309 // Copy contents
310 for (index = 0; index < length; index++) {
311 jchar c = from_buffer->char_at(index + offset);
312 if (c == from_char) {
313 c = to_char;
314 }
315 to_buffer->char_at_put(index, c);
316 }
317 return string;
318 }
320 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
321 typeArrayOop value = java_lang_String::value(java_string);
322 int offset = java_lang_String::offset(java_string);
323 length = java_lang_String::length(java_string);
325 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
326 if (result != NULL) {
327 for (int index = 0; index < length; index++) {
328 result[index] = value->char_at(index + offset);
329 }
330 } else {
331 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
332 }
333 return result;
334 }
336 unsigned int java_lang_String::hash_code(oop java_string) {
337 int length = java_lang_String::length(java_string);
338 // Zero length string will hash to zero with String.hashCode() function.
339 if (length == 0) return 0;
341 typeArrayOop value = java_lang_String::value(java_string);
342 int offset = java_lang_String::offset(java_string);
343 return java_lang_String::hash_code(value->char_at_addr(offset), length);
344 }
346 char* java_lang_String::as_quoted_ascii(oop java_string) {
347 typeArrayOop value = java_lang_String::value(java_string);
348 int offset = java_lang_String::offset(java_string);
349 int length = java_lang_String::length(java_string);
351 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
352 if (base == NULL) return NULL;
354 int result_length = UNICODE::quoted_ascii_length(base, length) + 1;
355 char* result = NEW_RESOURCE_ARRAY(char, result_length);
356 UNICODE::as_quoted_ascii(base, length, result, result_length);
357 assert(result_length >= length + 1, "must not be shorter");
358 assert(result_length == (int)strlen(result) + 1, "must match");
359 return result;
360 }
362 unsigned int java_lang_String::hash_string(oop java_string) {
363 int length = java_lang_String::length(java_string);
364 // Zero length string doesn't hash necessarily hash to zero.
365 if (length == 0) {
366 return StringTable::hash_string(NULL, 0);
367 }
369 typeArrayOop value = java_lang_String::value(java_string);
370 int offset = java_lang_String::offset(java_string);
371 return StringTable::hash_string(value->char_at_addr(offset), length);
372 }
374 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {
375 oop obj = java_string();
376 typeArrayOop value = java_lang_String::value(obj);
377 int offset = java_lang_String::offset(obj);
378 int length = java_lang_String::length(obj);
379 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
380 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
381 return sym;
382 }
384 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
385 typeArrayOop value = java_lang_String::value(java_string);
386 int offset = java_lang_String::offset(java_string);
387 int length = java_lang_String::length(java_string);
388 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
389 return SymbolTable::probe_unicode(base, length);
390 }
393 int java_lang_String::utf8_length(oop java_string) {
394 typeArrayOop value = java_lang_String::value(java_string);
395 int offset = java_lang_String::offset(java_string);
396 int length = java_lang_String::length(java_string);
397 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
398 return UNICODE::utf8_length(position, length);
399 }
401 char* java_lang_String::as_utf8_string(oop java_string) {
402 typeArrayOop value = java_lang_String::value(java_string);
403 int offset = java_lang_String::offset(java_string);
404 int length = java_lang_String::length(java_string);
405 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
406 return UNICODE::as_utf8(position, length);
407 }
409 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
410 typeArrayOop value = java_lang_String::value(java_string);
411 int offset = java_lang_String::offset(java_string);
412 int length = java_lang_String::length(java_string);
413 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
414 return UNICODE::as_utf8(position, length, buf, buflen);
415 }
417 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
418 typeArrayOop value = java_lang_String::value(java_string);
419 int offset = java_lang_String::offset(java_string);
420 int length = java_lang_String::length(java_string);
421 assert(start + len <= length, "just checking");
422 jchar* position = value->char_at_addr(offset + start);
423 return UNICODE::as_utf8(position, len);
424 }
426 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
427 assert(java_string->klass() == SystemDictionary::String_klass(),
428 "must be java_string");
429 typeArrayOop value = java_lang_String::value(java_string);
430 int offset = java_lang_String::offset(java_string);
431 int length = java_lang_String::length(java_string);
432 if (length != len) {
433 return false;
434 }
435 for (int i = 0; i < len; i++) {
436 if (value->char_at(i + offset) != chars[i]) {
437 return false;
438 }
439 }
440 return true;
441 }
443 bool java_lang_String::equals(oop str1, oop str2) {
444 assert(str1->klass() == SystemDictionary::String_klass(),
445 "must be java String");
446 assert(str2->klass() == SystemDictionary::String_klass(),
447 "must be java String");
448 typeArrayOop value1 = java_lang_String::value(str1);
449 int offset1 = java_lang_String::offset(str1);
450 int length1 = java_lang_String::length(str1);
451 typeArrayOop value2 = java_lang_String::value(str2);
452 int offset2 = java_lang_String::offset(str2);
453 int length2 = java_lang_String::length(str2);
455 if (length1 != length2) {
456 return false;
457 }
458 for (int i = 0; i < length1; i++) {
459 if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) {
460 return false;
461 }
462 }
463 return true;
464 }
466 void java_lang_String::print(Handle java_string, outputStream* st) {
467 oop obj = java_string();
468 assert(obj->klass() == SystemDictionary::String_klass(), "must be java_string");
469 typeArrayOop value = java_lang_String::value(obj);
470 int offset = java_lang_String::offset(obj);
471 int length = java_lang_String::length(obj);
473 int end = MIN2(length, 100);
474 if (value == NULL) {
475 // This can happen if, e.g., printing a String
476 // object before its initializer has been called
477 st->print_cr("NULL");
478 } else {
479 st->print("\"");
480 for (int index = 0; index < length; index++) {
481 st->print("%c", value->char_at(index + offset));
482 }
483 st->print("\"");
484 }
485 }
488 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
489 assert(mirror.not_null() && fd->is_static(), "just checking");
490 if (fd->has_initial_value()) {
491 BasicType t = fd->field_type();
492 switch (t) {
493 case T_BYTE:
494 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
495 break;
496 case T_BOOLEAN:
497 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
498 break;
499 case T_CHAR:
500 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
501 break;
502 case T_SHORT:
503 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
504 break;
505 case T_INT:
506 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
507 break;
508 case T_FLOAT:
509 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
510 break;
511 case T_DOUBLE:
512 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
513 break;
514 case T_LONG:
515 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
516 break;
517 case T_OBJECT:
518 {
519 #ifdef ASSERT
520 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
521 assert(fd->signature() == sym, "just checking");
522 #endif
523 oop string = fd->string_initial_value(CHECK);
524 mirror()->obj_field_put(fd->offset(), string);
525 }
526 break;
527 default:
528 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
529 "Illegal ConstantValue attribute in class file");
530 }
531 }
532 }
535 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) {
536 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
538 // If the offset was read from the shared archive, it was fixed up already
539 if (!k->is_shared()) {
540 if (k->oop_is_instance()) {
541 // During bootstrap, java.lang.Class wasn't loaded so static field
542 // offsets were computed without the size added it. Go back and
543 // update all the static field offsets to included the size.
544 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) {
545 if (fs.access_flags().is_static()) {
546 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
547 fs.set_offset(real_offset);
548 }
549 }
550 }
551 }
552 create_mirror(k, Handle(NULL), CHECK);
553 }
555 void java_lang_Class::initialize_mirror_fields(KlassHandle k,
556 Handle mirror,
557 Handle protection_domain,
558 TRAPS) {
559 // Allocate a simple java object for a lock.
560 // This needs to be a java object because during class initialization
561 // it can be held across a java call.
562 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
563 set_init_lock(mirror(), r);
565 // Set protection domain also
566 set_protection_domain(mirror(), protection_domain());
568 // Initialize static fields
569 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK);
570 }
572 void java_lang_Class::create_mirror(KlassHandle k, Handle protection_domain, TRAPS) {
573 assert(k->java_mirror() == NULL, "should only assign mirror once");
574 // Use this moment of initialization to cache modifier_flags also,
575 // to support Class.getModifiers(). Instance classes recalculate
576 // the cached flags after the class file is parsed, but before the
577 // class is put into the system dictionary.
578 int computed_modifiers = k->compute_modifier_flags(CHECK);
579 k->set_modifier_flags(computed_modifiers);
580 // Class_klass has to be loaded because it is used to allocate
581 // the mirror.
582 if (SystemDictionary::Class_klass_loaded()) {
583 // Allocate mirror (java.lang.Class instance)
584 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
586 // Setup indirection from mirror->klass
587 if (!k.is_null()) {
588 java_lang_Class::set_klass(mirror(), k());
589 }
591 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
592 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
594 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
596 // It might also have a component mirror. This mirror must already exist.
597 if (k->oop_is_array()) {
598 Handle comp_mirror;
599 if (k->oop_is_typeArray()) {
600 BasicType type = TypeArrayKlass::cast(k())->element_type();
601 comp_mirror = Universe::java_mirror(type);
602 } else {
603 assert(k->oop_is_objArray(), "Must be");
604 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass();
605 assert(element_klass != NULL, "Must have an element klass");
606 comp_mirror = element_klass->java_mirror();
607 }
608 assert(comp_mirror.not_null(), "must have a mirror");
610 // Two-way link between the array klass and its component mirror:
611 ArrayKlass::cast(k())->set_component_mirror(comp_mirror());
612 set_array_klass(comp_mirror(), k());
613 } else {
614 assert(k->oop_is_instance(), "Must be");
616 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
617 if (HAS_PENDING_EXCEPTION) {
618 // If any of the fields throws an exception like OOM remove the klass field
619 // from the mirror so GC doesn't follow it after the klass has been deallocated.
620 // This mirror looks like a primitive type, which logically it is because it
621 // it represents no class.
622 java_lang_Class::set_klass(mirror(), NULL);
623 return;
624 }
625 }
627 // Setup indirection from klass->mirror last
628 // after any exceptions can happen during allocations.
629 if (!k.is_null()) {
630 k->set_java_mirror(mirror());
631 }
632 } else {
633 if (fixup_mirror_list() == NULL) {
634 GrowableArray<Klass*>* list =
635 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
636 set_fixup_mirror_list(list);
637 }
638 fixup_mirror_list()->push(k());
639 }
640 }
643 int java_lang_Class::oop_size(oop java_class) {
644 assert(_oop_size_offset != 0, "must be set");
645 return java_class->int_field(_oop_size_offset);
646 }
647 void java_lang_Class::set_oop_size(oop java_class, int size) {
648 assert(_oop_size_offset != 0, "must be set");
649 java_class->int_field_put(_oop_size_offset, size);
650 }
651 int java_lang_Class::static_oop_field_count(oop java_class) {
652 assert(_static_oop_field_count_offset != 0, "must be set");
653 return java_class->int_field(_static_oop_field_count_offset);
654 }
655 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
656 assert(_static_oop_field_count_offset != 0, "must be set");
657 java_class->int_field_put(_static_oop_field_count_offset, size);
658 }
660 oop java_lang_Class::protection_domain(oop java_class) {
661 assert(_protection_domain_offset != 0, "must be set");
662 return java_class->obj_field(_protection_domain_offset);
663 }
664 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
665 assert(_protection_domain_offset != 0, "must be set");
666 java_class->obj_field_put(_protection_domain_offset, pd);
667 }
669 oop java_lang_Class::init_lock(oop java_class) {
670 assert(_init_lock_offset != 0, "must be set");
671 return java_class->obj_field(_init_lock_offset);
672 }
673 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
674 assert(_init_lock_offset != 0, "must be set");
675 java_class->obj_field_put(_init_lock_offset, init_lock);
676 }
678 objArrayOop java_lang_Class::signers(oop java_class) {
679 assert(_signers_offset != 0, "must be set");
680 return (objArrayOop)java_class->obj_field(_signers_offset);
681 }
682 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
683 assert(_signers_offset != 0, "must be set");
684 java_class->obj_field_put(_signers_offset, (oop)signers);
685 }
688 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
689 // This should be improved by adding a field at the Java level or by
690 // introducing a new VM klass (see comment in ClassFileParser)
691 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
692 if (type != T_VOID) {
693 Klass* aklass = Universe::typeArrayKlassObj(type);
694 assert(aklass != NULL, "correct bootstrap");
695 set_array_klass(java_class, aklass);
696 }
697 #ifdef ASSERT
698 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
699 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
700 #endif
701 return java_class;
702 }
705 Klass* java_lang_Class::as_Klass(oop java_class) {
706 //%note memory_2
707 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
708 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
709 assert(k == NULL || k->is_klass(), "type check");
710 return k;
711 }
714 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
715 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
716 java_class->metadata_field_put(_klass_offset, klass);
717 }
720 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
721 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
722 Symbol* name = NULL;
723 bool is_instance = false;
724 if (is_primitive(java_class)) {
725 name = vmSymbols::type_signature(primitive_type(java_class));
726 } else {
727 Klass* k = as_Klass(java_class);
728 is_instance = k->oop_is_instance();
729 name = k->name();
730 }
731 if (name == NULL) {
732 st->print("<null>");
733 return;
734 }
735 if (is_instance) st->print("L");
736 st->write((char*) name->base(), (int) name->utf8_length());
737 if (is_instance) st->print(";");
738 }
740 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
741 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
742 Symbol* name;
743 if (is_primitive(java_class)) {
744 name = vmSymbols::type_signature(primitive_type(java_class));
745 // Because this can create a new symbol, the caller has to decrement
746 // the refcount, so make adjustment here and below for symbols returned
747 // that are not created or incremented due to a successful lookup.
748 name->increment_refcount();
749 } else {
750 Klass* k = as_Klass(java_class);
751 if (!k->oop_is_instance()) {
752 name = k->name();
753 name->increment_refcount();
754 } else {
755 ResourceMark rm;
756 const char* sigstr = k->signature_name();
757 int siglen = (int) strlen(sigstr);
758 if (!intern_if_not_found) {
759 name = SymbolTable::probe(sigstr, siglen);
760 } else {
761 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
762 }
763 }
764 }
765 return name;
766 }
769 Klass* java_lang_Class::array_klass(oop java_class) {
770 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
771 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass");
772 return k;
773 }
776 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
777 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass");
778 java_class->metadata_field_put(_array_klass_offset, klass);
779 }
782 bool java_lang_Class::is_primitive(oop java_class) {
783 // should assert:
784 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
785 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
787 #ifdef ASSERT
788 if (is_primitive) {
789 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
790 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
791 "Should be either the T_VOID primitive or a java primitive");
792 }
793 #endif
795 return is_primitive;
796 }
799 BasicType java_lang_Class::primitive_type(oop java_class) {
800 assert(java_lang_Class::is_primitive(java_class), "just checking");
801 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
802 BasicType type = T_VOID;
803 if (ak != NULL) {
804 // Note: create_basic_type_mirror above initializes ak to a non-null value.
805 type = ArrayKlass::cast(ak)->element_type();
806 } else {
807 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
808 }
809 assert(Universe::java_mirror(type) == java_class, "must be consistent");
810 return type;
811 }
813 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
814 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
815 if (is_primitive(java_class)) {
816 if (reference_klass != NULL)
817 (*reference_klass) = NULL;
818 return primitive_type(java_class);
819 } else {
820 if (reference_klass != NULL)
821 (*reference_klass) = as_Klass(java_class);
822 return T_OBJECT;
823 }
824 }
827 oop java_lang_Class::primitive_mirror(BasicType t) {
828 oop mirror = Universe::java_mirror(t);
829 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
830 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
831 return mirror;
832 }
834 bool java_lang_Class::offsets_computed = false;
835 int java_lang_Class::classRedefinedCount_offset = -1;
837 void java_lang_Class::compute_offsets() {
838 assert(!offsets_computed, "offsets should be initialized only once");
839 offsets_computed = true;
841 Klass* klass_oop = SystemDictionary::Class_klass();
842 // The classRedefinedCount field is only present starting in 1.5,
843 // so don't go fatal.
844 compute_optional_offset(classRedefinedCount_offset,
845 klass_oop, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
847 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
848 }
850 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
851 if (!JDK_Version::is_gte_jdk15x_version()
852 || classRedefinedCount_offset == -1) {
853 // The classRedefinedCount field is only present starting in 1.5.
854 // If we don't have an offset for it then just return -1 as a marker.
855 return -1;
856 }
858 return the_class_mirror->int_field(classRedefinedCount_offset);
859 }
861 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
862 if (!JDK_Version::is_gte_jdk15x_version()
863 || classRedefinedCount_offset == -1) {
864 // The classRedefinedCount field is only present starting in 1.5.
865 // If we don't have an offset for it then nothing to set.
866 return;
867 }
869 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
870 }
873 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
874 // platform thread structure, and a eetop offset which was used for thread
875 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
876 // merged, so in the HotSpot VM we just use the eetop field for the thread
877 // instead of the privateInfo_offset.
878 //
879 // Note: The stackSize field is only present starting in 1.4.
881 int java_lang_Thread::_name_offset = 0;
882 int java_lang_Thread::_group_offset = 0;
883 int java_lang_Thread::_contextClassLoader_offset = 0;
884 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
885 int java_lang_Thread::_priority_offset = 0;
886 int java_lang_Thread::_eetop_offset = 0;
887 int java_lang_Thread::_daemon_offset = 0;
888 int java_lang_Thread::_stillborn_offset = 0;
889 int java_lang_Thread::_stackSize_offset = 0;
890 int java_lang_Thread::_tid_offset = 0;
891 int java_lang_Thread::_thread_status_offset = 0;
892 int java_lang_Thread::_park_blocker_offset = 0;
893 int java_lang_Thread::_park_event_offset = 0 ;
896 void java_lang_Thread::compute_offsets() {
897 assert(_group_offset == 0, "offsets should be initialized only once");
899 Klass* k = SystemDictionary::Thread_klass();
900 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature());
901 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
902 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
903 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
904 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
905 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
906 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
907 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
908 // The stackSize field is only present starting in 1.4, so don't go fatal.
909 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
910 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
911 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
912 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
913 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
914 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
915 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
916 vmSymbols::long_signature());
917 }
920 JavaThread* java_lang_Thread::thread(oop java_thread) {
921 return (JavaThread*)java_thread->address_field(_eetop_offset);
922 }
925 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
926 java_thread->address_field_put(_eetop_offset, (address)thread);
927 }
930 typeArrayOop java_lang_Thread::name(oop java_thread) {
931 oop name = java_thread->obj_field(_name_offset);
932 assert(name == NULL || (name->is_typeArray() && TypeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking");
933 return typeArrayOop(name);
934 }
937 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) {
938 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL");
939 java_thread->obj_field_put(_name_offset, name);
940 }
943 ThreadPriority java_lang_Thread::priority(oop java_thread) {
944 return (ThreadPriority)java_thread->int_field(_priority_offset);
945 }
948 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
949 java_thread->int_field_put(_priority_offset, priority);
950 }
953 oop java_lang_Thread::threadGroup(oop java_thread) {
954 return java_thread->obj_field(_group_offset);
955 }
958 bool java_lang_Thread::is_stillborn(oop java_thread) {
959 return java_thread->bool_field(_stillborn_offset) != 0;
960 }
963 // We never have reason to turn the stillborn bit off
964 void java_lang_Thread::set_stillborn(oop java_thread) {
965 java_thread->bool_field_put(_stillborn_offset, true);
966 }
969 bool java_lang_Thread::is_alive(oop java_thread) {
970 JavaThread* thr = java_lang_Thread::thread(java_thread);
971 return (thr != NULL);
972 }
975 bool java_lang_Thread::is_daemon(oop java_thread) {
976 return java_thread->bool_field(_daemon_offset) != 0;
977 }
980 void java_lang_Thread::set_daemon(oop java_thread) {
981 java_thread->bool_field_put(_daemon_offset, true);
982 }
984 oop java_lang_Thread::context_class_loader(oop java_thread) {
985 return java_thread->obj_field(_contextClassLoader_offset);
986 }
988 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
989 return java_thread->obj_field(_inheritedAccessControlContext_offset);
990 }
993 jlong java_lang_Thread::stackSize(oop java_thread) {
994 // The stackSize field is only present starting in 1.4
995 if (_stackSize_offset > 0) {
996 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check");
997 return java_thread->long_field(_stackSize_offset);
998 } else {
999 return 0;
1000 }
1001 }
1003 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1004 void java_lang_Thread::set_thread_status(oop java_thread,
1005 java_lang_Thread::ThreadStatus status) {
1006 // The threadStatus is only present starting in 1.5
1007 if (_thread_status_offset > 0) {
1008 java_thread->int_field_put(_thread_status_offset, status);
1009 }
1010 }
1012 // Read thread status value from threadStatus field in java.lang.Thread java class.
1013 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1014 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() ||
1015 JavaThread::current()->thread_state() == _thread_in_vm,
1016 "Java Thread is not running in vm");
1017 // The threadStatus is only present starting in 1.5
1018 if (_thread_status_offset > 0) {
1019 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1020 } else {
1021 // All we can easily figure out is if it is alive, but that is
1022 // enough info for a valid unknown status.
1023 // These aren't restricted to valid set ThreadStatus values, so
1024 // use JVMTI values and cast.
1025 JavaThread* thr = java_lang_Thread::thread(java_thread);
1026 if (thr == NULL) {
1027 // the thread hasn't run yet or is in the process of exiting
1028 return NEW;
1029 }
1030 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1031 }
1032 }
1035 jlong java_lang_Thread::thread_id(oop java_thread) {
1036 // The thread ID field is only present starting in 1.5
1037 if (_tid_offset > 0) {
1038 return java_thread->long_field(_tid_offset);
1039 } else {
1040 return 0;
1041 }
1042 }
1044 oop java_lang_Thread::park_blocker(oop java_thread) {
1045 assert(JDK_Version::current().supports_thread_park_blocker() &&
1046 _park_blocker_offset != 0, "Must support parkBlocker field");
1048 if (_park_blocker_offset > 0) {
1049 return java_thread->obj_field(_park_blocker_offset);
1050 }
1052 return NULL;
1053 }
1055 jlong java_lang_Thread::park_event(oop java_thread) {
1056 if (_park_event_offset > 0) {
1057 return java_thread->long_field(_park_event_offset);
1058 }
1059 return 0;
1060 }
1062 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1063 if (_park_event_offset > 0) {
1064 java_thread->long_field_put(_park_event_offset, ptr);
1065 return true;
1066 }
1067 return false;
1068 }
1071 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1072 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status");
1073 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1074 switch (status) {
1075 case NEW : return "NEW";
1076 case RUNNABLE : return "RUNNABLE";
1077 case SLEEPING : return "TIMED_WAITING (sleeping)";
1078 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1079 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1080 case PARKED : return "WAITING (parking)";
1081 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1082 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1083 case TERMINATED : return "TERMINATED";
1084 default : return "UNKNOWN";
1085 };
1086 }
1087 int java_lang_ThreadGroup::_parent_offset = 0;
1088 int java_lang_ThreadGroup::_name_offset = 0;
1089 int java_lang_ThreadGroup::_threads_offset = 0;
1090 int java_lang_ThreadGroup::_groups_offset = 0;
1091 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1092 int java_lang_ThreadGroup::_destroyed_offset = 0;
1093 int java_lang_ThreadGroup::_daemon_offset = 0;
1094 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
1095 int java_lang_ThreadGroup::_nthreads_offset = 0;
1096 int java_lang_ThreadGroup::_ngroups_offset = 0;
1098 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1099 assert(java_thread_group->is_oop(), "thread group must be oop");
1100 return java_thread_group->obj_field(_parent_offset);
1101 }
1103 // ("name as oop" accessor is not necessary)
1105 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
1106 oop name = java_thread_group->obj_field(_name_offset);
1107 // ThreadGroup.name can be null
1108 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
1109 }
1111 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1112 assert(java_thread_group->is_oop(), "thread group must be oop");
1113 return java_thread_group->int_field(_nthreads_offset);
1114 }
1116 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1117 oop threads = java_thread_group->obj_field(_threads_offset);
1118 assert(threads != NULL, "threadgroups should have threads");
1119 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1120 return objArrayOop(threads);
1121 }
1123 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1124 assert(java_thread_group->is_oop(), "thread group must be oop");
1125 return java_thread_group->int_field(_ngroups_offset);
1126 }
1128 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1129 oop groups = java_thread_group->obj_field(_groups_offset);
1130 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1131 return objArrayOop(groups);
1132 }
1134 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1135 assert(java_thread_group->is_oop(), "thread group must be oop");
1136 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1137 }
1139 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1140 assert(java_thread_group->is_oop(), "thread group must be oop");
1141 return java_thread_group->bool_field(_destroyed_offset) != 0;
1142 }
1144 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1145 assert(java_thread_group->is_oop(), "thread group must be oop");
1146 return java_thread_group->bool_field(_daemon_offset) != 0;
1147 }
1149 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1150 assert(java_thread_group->is_oop(), "thread group must be oop");
1151 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1152 }
1154 void java_lang_ThreadGroup::compute_offsets() {
1155 assert(_parent_offset == 0, "offsets should be initialized only once");
1157 Klass* k = SystemDictionary::ThreadGroup_klass();
1159 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1160 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1161 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1162 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1163 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1164 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1165 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1166 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1167 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1168 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1169 }
1171 oop java_lang_Throwable::unassigned_stacktrace() {
1172 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass());
1173 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1174 if (UseCompressedOops) {
1175 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1176 } else {
1177 return oopDesc::load_decode_heap_oop((oop*)addr);
1178 }
1179 }
1181 oop java_lang_Throwable::backtrace(oop throwable) {
1182 return throwable->obj_field_acquire(backtrace_offset);
1183 }
1186 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1187 throwable->release_obj_field_put(backtrace_offset, value);
1188 }
1191 oop java_lang_Throwable::message(oop throwable) {
1192 return throwable->obj_field(detailMessage_offset);
1193 }
1196 oop java_lang_Throwable::message(Handle throwable) {
1197 return throwable->obj_field(detailMessage_offset);
1198 }
1201 void java_lang_Throwable::set_message(oop throwable, oop value) {
1202 throwable->obj_field_put(detailMessage_offset, value);
1203 }
1206 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1207 throwable->obj_field_put(stackTrace_offset, st_element_array);
1208 }
1210 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1211 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1212 set_stacktrace(throwable, NULL);
1213 }
1216 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1217 ResourceMark rm;
1218 Klass* k = throwable->klass();
1219 assert(k != NULL, "just checking");
1220 st->print("%s", InstanceKlass::cast(k)->external_name());
1221 oop msg = message(throwable);
1222 if (msg != NULL) {
1223 st->print(": %s", java_lang_String::as_utf8_string(msg));
1224 }
1225 }
1228 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1229 ResourceMark rm;
1230 Klass* k = throwable->klass();
1231 assert(k != NULL, "just checking");
1232 st->print("%s", InstanceKlass::cast(k)->external_name());
1233 oop msg = message(throwable);
1234 if (msg != NULL) {
1235 st->print(": %s", java_lang_String::as_utf8_string(msg));
1236 }
1237 }
1239 // After this many redefines, the stack trace is unreliable.
1240 const int MAX_VERSION = USHRT_MAX;
1242 // Helper backtrace functions to store bci|version together.
1243 static inline int merge_bci_and_version(int bci, int version) {
1244 // only store u2 for version, checking for overflow.
1245 if (version > USHRT_MAX || version < 0) version = MAX_VERSION;
1246 assert((jushort)bci == bci, "bci should be short");
1247 return build_int_from_shorts(version, bci);
1248 }
1250 static inline int bci_at(unsigned int merged) {
1251 return extract_high_short_from_int(merged);
1252 }
1253 static inline int version_at(unsigned int merged) {
1254 return extract_low_short_from_int(merged);
1255 }
1257 static inline bool version_matches(Method* method, int version) {
1258 return (method->constants()->version() == version && version < MAX_VERSION);
1259 }
1261 static inline int get_line_number(Method* method, int bci) {
1262 int line_number = 0;
1263 if (method->is_native()) {
1264 // Negative value different from -1 below, enabling Java code in
1265 // class java.lang.StackTraceElement to distinguish "native" from
1266 // "no LineNumberTable". JDK tests for -2.
1267 line_number = -2;
1268 } else {
1269 // Returns -1 if no LineNumberTable, and otherwise actual line number
1270 line_number = method->line_number_from_bci(bci);
1271 if (line_number == -1 && ShowHiddenFrames) {
1272 line_number = bci + 1000000;
1273 }
1274 }
1275 return line_number;
1276 }
1278 // This class provides a simple wrapper over the internal structure of
1279 // exception backtrace to insulate users of the backtrace from needing
1280 // to know what it looks like.
1281 class BacktraceBuilder: public StackObj {
1282 private:
1283 Handle _backtrace;
1284 objArrayOop _head;
1285 typeArrayOop _methods;
1286 typeArrayOop _bcis;
1287 objArrayOop _mirrors;
1288 int _index;
1289 No_Safepoint_Verifier _nsv;
1291 public:
1293 enum {
1294 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1295 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1296 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1297 trace_next_offset = java_lang_Throwable::trace_next_offset,
1298 trace_size = java_lang_Throwable::trace_size,
1299 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1300 };
1302 // get info out of chunks
1303 static typeArrayOop get_methods(objArrayHandle chunk) {
1304 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1305 assert(methods != NULL, "method array should be initialized in backtrace");
1306 return methods;
1307 }
1308 static typeArrayOop get_bcis(objArrayHandle chunk) {
1309 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1310 assert(bcis != NULL, "bci array should be initialized in backtrace");
1311 return bcis;
1312 }
1313 static objArrayOop get_mirrors(objArrayHandle chunk) {
1314 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1315 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1316 return mirrors;
1317 }
1319 // constructor for new backtrace
1320 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL) {
1321 expand(CHECK);
1322 _backtrace = _head;
1323 _index = 0;
1324 }
1326 BacktraceBuilder(objArrayHandle backtrace) {
1327 _methods = get_methods(backtrace);
1328 _bcis = get_bcis(backtrace);
1329 _mirrors = get_mirrors(backtrace);
1330 assert(_methods->length() == _bcis->length() &&
1331 _methods->length() == _mirrors->length(),
1332 "method and source information arrays should match");
1334 // head is the preallocated backtrace
1335 _backtrace = _head = backtrace();
1336 _index = 0;
1337 }
1339 void expand(TRAPS) {
1340 objArrayHandle old_head(THREAD, _head);
1341 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1343 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1344 objArrayHandle new_head(THREAD, head);
1346 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1347 typeArrayHandle new_methods(THREAD, methods);
1349 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1350 typeArrayHandle new_bcis(THREAD, bcis);
1352 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1353 objArrayHandle new_mirrors(THREAD, mirrors);
1355 if (!old_head.is_null()) {
1356 old_head->obj_at_put(trace_next_offset, new_head());
1357 }
1358 new_head->obj_at_put(trace_methods_offset, new_methods());
1359 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1360 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1362 _head = new_head();
1363 _methods = new_methods();
1364 _bcis = new_bcis();
1365 _mirrors = new_mirrors();
1366 _index = 0;
1367 }
1369 oop backtrace() {
1370 return _backtrace();
1371 }
1373 inline void push(Method* method, int bci, TRAPS) {
1374 // Smear the -1 bci to 0 since the array only holds unsigned
1375 // shorts. The later line number lookup would just smear the -1
1376 // to a 0 even if it could be recorded.
1377 if (bci == SynchronizationEntryBCI) bci = 0;
1379 if (_index >= trace_chunk_size) {
1380 methodHandle mhandle(THREAD, method);
1381 expand(CHECK);
1382 method = mhandle();
1383 }
1385 _methods->short_at_put(_index, method->method_idnum());
1386 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version()));
1388 // We need to save the mirrors in the backtrace to keep the class
1389 // from being unloaded while we still have this stack trace.
1390 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1391 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1392 _index++;
1393 }
1395 };
1397 // Print stack trace element to resource allocated buffer
1398 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
1399 int method_id, int version, int bci) {
1401 // Get strings and string lengths
1402 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1403 const char* klass_name = holder->external_name();
1404 int buf_len = (int)strlen(klass_name);
1406 // The method id may point to an obsolete method, can't get more stack information
1407 Method* method = holder->method_with_idnum(method_id);
1408 if (method == NULL) {
1409 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1410 // This is what the java code prints in this case - added Redefined
1411 sprintf(buf, "\tat %s.null (Redefined)", klass_name);
1412 return buf;
1413 }
1415 char* method_name = method->name()->as_C_string();
1416 buf_len += (int)strlen(method_name);
1418 char* source_file_name = NULL;
1419 if (version_matches(method, version)) {
1420 Symbol* source = holder->source_file_name();
1421 if (source != NULL) {
1422 source_file_name = source->as_C_string();
1423 buf_len += (int)strlen(source_file_name);
1424 }
1425 }
1427 // Allocate temporary buffer with extra space for formatting and line number
1428 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1430 // Print stack trace line in buffer
1431 sprintf(buf, "\tat %s.%s", klass_name, method_name);
1433 if (!version_matches(method, version)) {
1434 strcat(buf, "(Redefined)");
1435 } else {
1436 int line_number = get_line_number(method, bci);
1437 if (line_number == -2) {
1438 strcat(buf, "(Native Method)");
1439 } else {
1440 if (source_file_name != NULL && (line_number != -1)) {
1441 // Sourcename and linenumber
1442 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1443 } else if (source_file_name != NULL) {
1444 // Just sourcename
1445 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1446 } else {
1447 // Neither sourcename nor linenumber
1448 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1449 }
1450 nmethod* nm = method->code();
1451 if (WizardMode && nm != NULL) {
1452 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1453 }
1454 }
1455 }
1457 return buf;
1458 }
1460 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror,
1461 int method_id, int version, int bci) {
1462 ResourceMark rm;
1463 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci);
1464 st->print_cr("%s", buf);
1465 }
1467 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) {
1468 Handle mirror = method->method_holder()->java_mirror();
1469 int method_id = method->method_idnum();
1470 int version = method->constants()->version();
1471 print_stack_element(st, mirror, method_id, version, bci);
1472 }
1474 const char* java_lang_Throwable::no_stack_trace_message() {
1475 return "\t<<no stack trace available>>";
1476 }
1479 // Currently used only for exceptions occurring during startup
1480 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1481 Thread *THREAD = Thread::current();
1482 Handle h_throwable(THREAD, throwable);
1483 while (h_throwable.not_null()) {
1484 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1485 if (result.is_null()) {
1486 st->print_cr("%s", no_stack_trace_message());
1487 return;
1488 }
1490 while (result.not_null()) {
1492 // Get method id, bci, version and mirror from chunk
1493 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result));
1494 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result));
1495 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result));
1497 int length = methods()->length();
1498 for (int index = 0; index < length; index++) {
1499 Handle mirror(THREAD, mirrors->obj_at(index));
1500 // NULL mirror means end of stack trace
1501 if (mirror.is_null()) goto handle_cause;
1502 int method = methods->short_at(index);
1503 int version = version_at(bcis->int_at(index));
1504 int bci = bci_at(bcis->int_at(index));
1505 print_stack_element(st, mirror, method, version, bci);
1506 }
1507 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1508 }
1509 handle_cause:
1510 {
1511 EXCEPTION_MARK;
1512 JavaValue cause(T_OBJECT);
1513 JavaCalls::call_virtual(&cause,
1514 h_throwable,
1515 KlassHandle(THREAD, h_throwable->klass()),
1516 vmSymbols::getCause_name(),
1517 vmSymbols::void_throwable_signature(),
1518 THREAD);
1519 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1520 if (HAS_PENDING_EXCEPTION) {
1521 CLEAR_PENDING_EXCEPTION;
1522 h_throwable = Handle();
1523 } else {
1524 h_throwable = Handle(THREAD, (oop) cause.get_jobject());
1525 if (h_throwable.not_null()) {
1526 st->print("Caused by: ");
1527 print(h_throwable, st);
1528 st->cr();
1529 }
1530 }
1531 }
1532 }
1533 }
1535 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) {
1536 if (!StackTraceInThrowable) return;
1537 ResourceMark rm(THREAD);
1539 // Start out by clearing the backtrace for this object, in case the VM
1540 // runs out of memory while allocating the stack trace
1541 set_backtrace(throwable(), NULL);
1542 if (JDK_Version::is_gte_jdk14x_version()) {
1543 // New since 1.4, clear lazily constructed Java level stacktrace if
1544 // refilling occurs
1545 // This is unnecessary in 1.7+ but harmless
1546 clear_stacktrace(throwable());
1547 }
1549 int max_depth = MaxJavaStackTraceDepth;
1550 JavaThread* thread = (JavaThread*)THREAD;
1551 BacktraceBuilder bt(CHECK);
1553 // If there is no Java frame just return the method that was being called
1554 // with bci 0
1555 if (!thread->has_last_Java_frame()) {
1556 if (max_depth >= 1 && method() != NULL) {
1557 bt.push(method(), 0, CHECK);
1558 set_backtrace(throwable(), bt.backtrace());
1559 }
1560 return;
1561 }
1563 // Instead of using vframe directly, this version of fill_in_stack_trace
1564 // basically handles everything by hand. This significantly improved the
1565 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1566 // See bug 6333838 for more details.
1567 // The "ASSERT" here is to verify this method generates the exactly same stack
1568 // trace as utilizing vframe.
1569 #ifdef ASSERT
1570 vframeStream st(thread);
1571 methodHandle st_method(THREAD, st.method());
1572 #endif
1573 int total_count = 0;
1574 RegisterMap map(thread, false);
1575 int decode_offset = 0;
1576 nmethod* nm = NULL;
1577 bool skip_fillInStackTrace_check = false;
1578 bool skip_throwableInit_check = false;
1579 bool skip_hidden = !ShowHiddenFrames;
1581 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1582 Method* method = NULL;
1583 int bci = 0;
1585 // Compiled java method case.
1586 if (decode_offset != 0) {
1587 DebugInfoReadStream stream(nm, decode_offset);
1588 decode_offset = stream.read_int();
1589 method = (Method*)nm->metadata_at(stream.read_int());
1590 bci = stream.read_bci();
1591 } else {
1592 if (fr.is_first_frame()) break;
1593 address pc = fr.pc();
1594 if (fr.is_interpreted_frame()) {
1595 intptr_t bcx = fr.interpreter_frame_bcx();
1596 method = fr.interpreter_frame_method();
1597 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
1598 fr = fr.sender(&map);
1599 } else {
1600 CodeBlob* cb = fr.cb();
1601 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1602 // but non nmethod
1603 fr = fr.sender(&map);
1604 if (cb == NULL || !cb->is_nmethod()) {
1605 continue;
1606 }
1607 nm = (nmethod*)cb;
1608 if (nm->method()->is_native()) {
1609 method = nm->method();
1610 bci = 0;
1611 } else {
1612 PcDesc* pd = nm->pc_desc_at(pc);
1613 decode_offset = pd->scope_decode_offset();
1614 // if decode_offset is not equal to 0, it will execute the
1615 // "compiled java method case" at the beginning of the loop.
1616 continue;
1617 }
1618 }
1619 }
1620 #ifdef ASSERT
1621 assert(st_method() == method && st.bci() == bci,
1622 "Wrong stack trace");
1623 st.next();
1624 // vframeStream::method isn't GC-safe so store off a copy
1625 // of the Method* in case we GC.
1626 if (!st.at_end()) {
1627 st_method = st.method();
1628 }
1629 #endif
1631 // the format of the stacktrace will be:
1632 // - 1 or more fillInStackTrace frames for the exception class (skipped)
1633 // - 0 or more <init> methods for the exception class (skipped)
1634 // - rest of the stack
1636 if (!skip_fillInStackTrace_check) {
1637 if ((method->name() == vmSymbols::fillInStackTrace_name() ||
1638 method->name() == vmSymbols::fillInStackTrace0_name()) &&
1639 throwable->is_a(method->method_holder())) {
1640 continue;
1641 }
1642 else {
1643 skip_fillInStackTrace_check = true; // gone past them all
1644 }
1645 }
1646 if (!skip_throwableInit_check) {
1647 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1649 // skip <init> methods of the exception class and superclasses
1650 // This is simlar to classic VM.
1651 if (method->name() == vmSymbols::object_initializer_name() &&
1652 throwable->is_a(method->method_holder())) {
1653 continue;
1654 } else {
1655 // there are none or we've seen them all - either way stop checking
1656 skip_throwableInit_check = true;
1657 }
1658 }
1659 if (method->is_hidden()) {
1660 if (skip_hidden) continue;
1661 }
1662 bt.push(method, bci, CHECK);
1663 total_count++;
1664 }
1666 // Put completed stack trace into throwable object
1667 set_backtrace(throwable(), bt.backtrace());
1668 }
1670 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) {
1671 // No-op if stack trace is disabled
1672 if (!StackTraceInThrowable) {
1673 return;
1674 }
1676 // Disable stack traces for some preallocated out of memory errors
1677 if (!Universe::should_fill_in_stack_trace(throwable)) {
1678 return;
1679 }
1681 PRESERVE_EXCEPTION_MARK;
1683 JavaThread* thread = JavaThread::active();
1684 fill_in_stack_trace(throwable, method, thread);
1685 // ignore exceptions thrown during stack trace filling
1686 CLEAR_PENDING_EXCEPTION;
1687 }
1689 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1690 // Allocate stack trace - backtrace is created but not filled in
1692 // No-op if stack trace is disabled
1693 if (!StackTraceInThrowable) return;
1694 BacktraceBuilder bt(CHECK); // creates a backtrace
1695 set_backtrace(throwable(), bt.backtrace());
1696 }
1699 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1700 // Fill in stack trace into preallocated backtrace (no GC)
1702 // No-op if stack trace is disabled
1703 if (!StackTraceInThrowable) return;
1705 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1707 JavaThread* THREAD = JavaThread::current();
1709 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
1710 assert(backtrace.not_null(), "backtrace should have been preallocated");
1712 ResourceMark rm(THREAD);
1713 vframeStream st(THREAD);
1715 BacktraceBuilder bt(backtrace);
1717 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1718 // methods as preallocated errors aren't created by "java" code.
1720 // fill in as much stack trace as possible
1721 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace);
1722 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1723 int chunk_count = 0;
1725 for (;!st.at_end(); st.next()) {
1726 bt.push(st.method(), st.bci(), CHECK);
1727 chunk_count++;
1729 // Bail-out for deep stacks
1730 if (chunk_count >= max_chunks) break;
1731 }
1733 // For Java 7+ we support the Throwable immutability protocol defined for Java 7. This support
1734 // was missing in 7u0 so in 7u0 there is a workaround in the Throwable class. That workaround
1735 // can be removed in a JDK using this JVM version
1736 if (JDK_Version::is_gte_jdk17x_version()) {
1737 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
1738 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
1739 }
1740 }
1743 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1744 if (throwable == NULL) {
1745 THROW_0(vmSymbols::java_lang_NullPointerException());
1746 }
1747 objArrayOop chunk = objArrayOop(backtrace(throwable));
1748 int depth = 0;
1749 if (chunk != NULL) {
1750 // Iterate over chunks and count full ones
1751 while (true) {
1752 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1753 if (next == NULL) break;
1754 depth += trace_chunk_size;
1755 chunk = next;
1756 }
1757 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1758 // Count element in remaining partial chunk. NULL value for mirror
1759 // marks the end of the stack trace elements that are saved.
1760 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1761 assert(mirrors != NULL, "sanity check");
1762 for (int i = 0; i < mirrors->length(); i++) {
1763 if (mirrors->obj_at(i) == NULL) break;
1764 depth++;
1765 }
1766 }
1767 return depth;
1768 }
1771 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1772 if (throwable == NULL) {
1773 THROW_0(vmSymbols::java_lang_NullPointerException());
1774 }
1775 if (index < 0) {
1776 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1777 }
1778 // Compute how many chunks to skip and index into actual chunk
1779 objArrayOop chunk = objArrayOop(backtrace(throwable));
1780 int skip_chunks = index / trace_chunk_size;
1781 int chunk_index = index % trace_chunk_size;
1782 while (chunk != NULL && skip_chunks > 0) {
1783 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1784 skip_chunks--;
1785 }
1786 if (chunk == NULL) {
1787 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1788 }
1789 // Get method id, bci, version and mirror from chunk
1790 typeArrayOop methods = BacktraceBuilder::get_methods(chunk);
1791 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk);
1792 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1794 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check");
1796 int method = methods->short_at(chunk_index);
1797 int version = version_at(bcis->int_at(chunk_index));
1798 int bci = bci_at(bcis->int_at(chunk_index));
1799 Handle mirror(THREAD, mirrors->obj_at(chunk_index));
1801 // Chunk can be partial full
1802 if (mirror.is_null()) {
1803 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1804 }
1806 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, CHECK_0);
1807 return element;
1808 }
1810 oop java_lang_StackTraceElement::create(Handle mirror, int method_id,
1811 int version, int bci, TRAPS) {
1812 // Allocate java.lang.StackTraceElement instance
1813 Klass* k = SystemDictionary::StackTraceElement_klass();
1814 assert(k != NULL, "must be loaded in 1.4+");
1815 instanceKlassHandle ik (THREAD, k);
1816 if (ik->should_be_initialized()) {
1817 ik->initialize(CHECK_0);
1818 }
1820 Handle element = ik->allocate_instance_handle(CHECK_0);
1821 // Fill in class name
1822 ResourceMark rm(THREAD);
1823 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1824 const char* str = holder->external_name();
1825 oop classname = StringTable::intern((char*) str, CHECK_0);
1826 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1828 Method* method = holder->method_with_idnum(method_id);
1829 // Method on stack may be obsolete because it was redefined so cannot be
1830 // found by idnum.
1831 if (method == NULL) {
1832 // leave name and fileName null
1833 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1834 return element();
1835 }
1837 // Fill in method name
1838 oop methodname = StringTable::intern(method->name(), CHECK_0);
1839 java_lang_StackTraceElement::set_methodName(element(), methodname);
1841 if (!version_matches(method, version)) {
1842 // The method was redefined, accurate line number information isn't available
1843 java_lang_StackTraceElement::set_fileName(element(), NULL);
1844 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1845 } else {
1846 // Fill in source file name and line number.
1847 Symbol* source = holder->source_file_name();
1848 if (ShowHiddenFrames && source == NULL)
1849 source = vmSymbols::unknown_class_name();
1850 oop filename = StringTable::intern(source, CHECK_0);
1851 java_lang_StackTraceElement::set_fileName(element(), filename);
1853 int line_number = get_line_number(method, bci);
1854 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1855 }
1856 return element();
1857 }
1859 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1860 Handle mirror (THREAD, method->method_holder()->java_mirror());
1861 int method_id = method->method_idnum();
1862 return create(mirror, method_id, method->constants()->version(), bci, THREAD);
1863 }
1865 void java_lang_reflect_AccessibleObject::compute_offsets() {
1866 Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
1867 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1868 }
1870 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1871 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1872 return (jboolean) reflect->bool_field(override_offset);
1873 }
1875 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1876 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1877 reflect->bool_field_put(override_offset, (int) value);
1878 }
1880 void java_lang_reflect_Method::compute_offsets() {
1881 Klass* k = SystemDictionary::reflect_Method_klass();
1882 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1883 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1884 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1885 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1886 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1887 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1888 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1889 // The generic signature and annotations fields are only present in 1.5
1890 signature_offset = -1;
1891 annotations_offset = -1;
1892 parameter_annotations_offset = -1;
1893 annotation_default_offset = -1;
1894 type_annotations_offset = -1;
1895 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1896 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1897 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1898 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1899 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
1900 }
1902 Handle java_lang_reflect_Method::create(TRAPS) {
1903 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1904 Klass* klass = SystemDictionary::reflect_Method_klass();
1905 // This class is eagerly initialized during VM initialization, since we keep a refence
1906 // to one of the methods
1907 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
1908 return InstanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH);
1909 }
1911 oop java_lang_reflect_Method::clazz(oop reflect) {
1912 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1913 return reflect->obj_field(clazz_offset);
1914 }
1916 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1917 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1918 reflect->obj_field_put(clazz_offset, value);
1919 }
1921 int java_lang_reflect_Method::slot(oop reflect) {
1922 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1923 return reflect->int_field(slot_offset);
1924 }
1926 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1927 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1928 reflect->int_field_put(slot_offset, value);
1929 }
1931 oop java_lang_reflect_Method::name(oop method) {
1932 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1933 return method->obj_field(name_offset);
1934 }
1936 void java_lang_reflect_Method::set_name(oop method, oop value) {
1937 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1938 method->obj_field_put(name_offset, value);
1939 }
1941 oop java_lang_reflect_Method::return_type(oop method) {
1942 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1943 return method->obj_field(returnType_offset);
1944 }
1946 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
1947 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1948 method->obj_field_put(returnType_offset, value);
1949 }
1951 oop java_lang_reflect_Method::parameter_types(oop method) {
1952 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1953 return method->obj_field(parameterTypes_offset);
1954 }
1956 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
1957 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1958 method->obj_field_put(parameterTypes_offset, value);
1959 }
1961 oop java_lang_reflect_Method::exception_types(oop method) {
1962 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1963 return method->obj_field(exceptionTypes_offset);
1964 }
1966 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
1967 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1968 method->obj_field_put(exceptionTypes_offset, value);
1969 }
1971 int java_lang_reflect_Method::modifiers(oop method) {
1972 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1973 return method->int_field(modifiers_offset);
1974 }
1976 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
1977 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1978 method->int_field_put(modifiers_offset, value);
1979 }
1981 bool java_lang_reflect_Method::has_signature_field() {
1982 return (signature_offset >= 0);
1983 }
1985 oop java_lang_reflect_Method::signature(oop method) {
1986 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1987 assert(has_signature_field(), "signature field must be present");
1988 return method->obj_field(signature_offset);
1989 }
1991 void java_lang_reflect_Method::set_signature(oop method, oop value) {
1992 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1993 assert(has_signature_field(), "signature field must be present");
1994 method->obj_field_put(signature_offset, value);
1995 }
1997 bool java_lang_reflect_Method::has_annotations_field() {
1998 return (annotations_offset >= 0);
1999 }
2001 oop java_lang_reflect_Method::annotations(oop method) {
2002 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2003 assert(has_annotations_field(), "annotations field must be present");
2004 return method->obj_field(annotations_offset);
2005 }
2007 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2008 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2009 assert(has_annotations_field(), "annotations field must be present");
2010 method->obj_field_put(annotations_offset, value);
2011 }
2013 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2014 return (parameter_annotations_offset >= 0);
2015 }
2017 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2018 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2019 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2020 return method->obj_field(parameter_annotations_offset);
2021 }
2023 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2024 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2025 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2026 method->obj_field_put(parameter_annotations_offset, value);
2027 }
2029 bool java_lang_reflect_Method::has_annotation_default_field() {
2030 return (annotation_default_offset >= 0);
2031 }
2033 oop java_lang_reflect_Method::annotation_default(oop method) {
2034 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2035 assert(has_annotation_default_field(), "annotation default field must be present");
2036 return method->obj_field(annotation_default_offset);
2037 }
2039 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2040 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2041 assert(has_annotation_default_field(), "annotation default field must be present");
2042 method->obj_field_put(annotation_default_offset, value);
2043 }
2045 bool java_lang_reflect_Method::has_type_annotations_field() {
2046 return (type_annotations_offset >= 0);
2047 }
2049 oop java_lang_reflect_Method::type_annotations(oop method) {
2050 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2051 assert(has_type_annotations_field(), "type_annotations field must be present");
2052 return method->obj_field(type_annotations_offset);
2053 }
2055 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2056 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2057 assert(has_type_annotations_field(), "type_annotations field must be present");
2058 method->obj_field_put(type_annotations_offset, value);
2059 }
2061 void java_lang_reflect_Constructor::compute_offsets() {
2062 Klass* k = SystemDictionary::reflect_Constructor_klass();
2063 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2064 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2065 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2066 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2067 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2068 // The generic signature and annotations fields are only present in 1.5
2069 signature_offset = -1;
2070 annotations_offset = -1;
2071 parameter_annotations_offset = -1;
2072 type_annotations_offset = -1;
2073 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2074 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2075 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2076 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2077 }
2079 Handle java_lang_reflect_Constructor::create(TRAPS) {
2080 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2081 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2082 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2083 instanceKlassHandle klass (THREAD, k);
2084 // Ensure it is initialized
2085 klass->initialize(CHECK_NH);
2086 return klass->allocate_instance_handle(CHECK_NH);
2087 }
2089 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2090 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2091 return reflect->obj_field(clazz_offset);
2092 }
2094 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2095 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2096 reflect->obj_field_put(clazz_offset, value);
2097 }
2099 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2100 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2101 return constructor->obj_field(parameterTypes_offset);
2102 }
2104 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2105 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2106 constructor->obj_field_put(parameterTypes_offset, value);
2107 }
2109 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2110 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2111 return constructor->obj_field(exceptionTypes_offset);
2112 }
2114 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2115 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2116 constructor->obj_field_put(exceptionTypes_offset, value);
2117 }
2119 int java_lang_reflect_Constructor::slot(oop reflect) {
2120 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2121 return reflect->int_field(slot_offset);
2122 }
2124 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2125 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2126 reflect->int_field_put(slot_offset, value);
2127 }
2129 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2130 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2131 return constructor->int_field(modifiers_offset);
2132 }
2134 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2135 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2136 constructor->int_field_put(modifiers_offset, value);
2137 }
2139 bool java_lang_reflect_Constructor::has_signature_field() {
2140 return (signature_offset >= 0);
2141 }
2143 oop java_lang_reflect_Constructor::signature(oop constructor) {
2144 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2145 assert(has_signature_field(), "signature field must be present");
2146 return constructor->obj_field(signature_offset);
2147 }
2149 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2150 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2151 assert(has_signature_field(), "signature field must be present");
2152 constructor->obj_field_put(signature_offset, value);
2153 }
2155 bool java_lang_reflect_Constructor::has_annotations_field() {
2156 return (annotations_offset >= 0);
2157 }
2159 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2160 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2161 assert(has_annotations_field(), "annotations field must be present");
2162 return constructor->obj_field(annotations_offset);
2163 }
2165 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2166 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2167 assert(has_annotations_field(), "annotations field must be present");
2168 constructor->obj_field_put(annotations_offset, value);
2169 }
2171 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2172 return (parameter_annotations_offset >= 0);
2173 }
2175 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2176 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2177 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2178 return method->obj_field(parameter_annotations_offset);
2179 }
2181 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2182 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2183 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2184 method->obj_field_put(parameter_annotations_offset, value);
2185 }
2187 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2188 return (type_annotations_offset >= 0);
2189 }
2191 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2192 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2193 assert(has_type_annotations_field(), "type_annotations field must be present");
2194 return constructor->obj_field(type_annotations_offset);
2195 }
2197 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2198 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2199 assert(has_type_annotations_field(), "type_annotations field must be present");
2200 constructor->obj_field_put(type_annotations_offset, value);
2201 }
2203 void java_lang_reflect_Field::compute_offsets() {
2204 Klass* k = SystemDictionary::reflect_Field_klass();
2205 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2206 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2207 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
2208 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2209 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2210 // The generic signature and annotations fields are only present in 1.5
2211 signature_offset = -1;
2212 annotations_offset = -1;
2213 type_annotations_offset = -1;
2214 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2215 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2216 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2217 }
2219 Handle java_lang_reflect_Field::create(TRAPS) {
2220 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2221 Symbol* name = vmSymbols::java_lang_reflect_Field();
2222 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2223 instanceKlassHandle klass (THREAD, k);
2224 // Ensure it is initialized
2225 klass->initialize(CHECK_NH);
2226 return klass->allocate_instance_handle(CHECK_NH);
2227 }
2229 oop java_lang_reflect_Field::clazz(oop reflect) {
2230 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2231 return reflect->obj_field(clazz_offset);
2232 }
2234 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2235 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2236 reflect->obj_field_put(clazz_offset, value);
2237 }
2239 oop java_lang_reflect_Field::name(oop field) {
2240 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2241 return field->obj_field(name_offset);
2242 }
2244 void java_lang_reflect_Field::set_name(oop field, oop value) {
2245 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2246 field->obj_field_put(name_offset, value);
2247 }
2249 oop java_lang_reflect_Field::type(oop field) {
2250 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2251 return field->obj_field(type_offset);
2252 }
2254 void java_lang_reflect_Field::set_type(oop field, oop value) {
2255 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2256 field->obj_field_put(type_offset, value);
2257 }
2259 int java_lang_reflect_Field::slot(oop reflect) {
2260 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2261 return reflect->int_field(slot_offset);
2262 }
2264 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2265 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2266 reflect->int_field_put(slot_offset, value);
2267 }
2269 int java_lang_reflect_Field::modifiers(oop field) {
2270 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2271 return field->int_field(modifiers_offset);
2272 }
2274 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2275 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2276 field->int_field_put(modifiers_offset, value);
2277 }
2279 bool java_lang_reflect_Field::has_signature_field() {
2280 return (signature_offset >= 0);
2281 }
2283 oop java_lang_reflect_Field::signature(oop field) {
2284 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2285 assert(has_signature_field(), "signature field must be present");
2286 return field->obj_field(signature_offset);
2287 }
2289 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2290 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2291 assert(has_signature_field(), "signature field must be present");
2292 field->obj_field_put(signature_offset, value);
2293 }
2295 bool java_lang_reflect_Field::has_annotations_field() {
2296 return (annotations_offset >= 0);
2297 }
2299 oop java_lang_reflect_Field::annotations(oop field) {
2300 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2301 assert(has_annotations_field(), "annotations field must be present");
2302 return field->obj_field(annotations_offset);
2303 }
2305 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2306 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2307 assert(has_annotations_field(), "annotations field must be present");
2308 field->obj_field_put(annotations_offset, value);
2309 }
2311 bool java_lang_reflect_Field::has_type_annotations_field() {
2312 return (type_annotations_offset >= 0);
2313 }
2315 oop java_lang_reflect_Field::type_annotations(oop field) {
2316 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2317 assert(has_type_annotations_field(), "type_annotations field must be present");
2318 return field->obj_field(type_annotations_offset);
2319 }
2321 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2322 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2323 assert(has_type_annotations_field(), "type_annotations field must be present");
2324 field->obj_field_put(type_annotations_offset, value);
2325 }
2327 void sun_reflect_ConstantPool::compute_offsets() {
2328 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2329 // This null test can be removed post beta
2330 if (k != NULL) {
2331 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2332 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2333 }
2334 }
2336 void java_lang_reflect_Parameter::compute_offsets() {
2337 Klass* k = SystemDictionary::reflect_Parameter_klass();
2338 if(NULL != k) {
2339 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2340 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2341 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature());
2342 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature());
2343 }
2344 }
2346 Handle java_lang_reflect_Parameter::create(TRAPS) {
2347 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2348 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2349 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2350 instanceKlassHandle klass (THREAD, k);
2351 // Ensure it is initialized
2352 klass->initialize(CHECK_NH);
2353 return klass->allocate_instance_handle(CHECK_NH);
2354 }
2356 oop java_lang_reflect_Parameter::name(oop param) {
2357 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2358 return param->obj_field(name_offset);
2359 }
2361 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2362 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2363 param->obj_field_put(name_offset, value);
2364 }
2366 int java_lang_reflect_Parameter::modifiers(oop param) {
2367 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2368 return param->int_field(modifiers_offset);
2369 }
2371 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2372 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2373 param->int_field_put(modifiers_offset, value);
2374 }
2376 int java_lang_reflect_Parameter::index(oop param) {
2377 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2378 return param->int_field(index_offset);
2379 }
2381 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2382 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2383 param->int_field_put(index_offset, value);
2384 }
2386 oop java_lang_reflect_Parameter::executable(oop param) {
2387 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2388 return param->obj_field(executable_offset);
2389 }
2391 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2392 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2393 param->obj_field_put(executable_offset, value);
2394 }
2397 Handle sun_reflect_ConstantPool::create(TRAPS) {
2398 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2399 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2400 instanceKlassHandle klass (THREAD, k);
2401 // Ensure it is initialized
2402 klass->initialize(CHECK_NH);
2403 return klass->allocate_instance_handle(CHECK_NH);
2404 }
2407 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2408 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2409 oop mirror = value->pool_holder()->java_mirror();
2410 // Save the mirror to get back the constant pool.
2411 reflect->obj_field_put(_oop_offset, mirror);
2412 }
2414 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) {
2415 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2417 oop mirror = reflect->obj_field(_oop_offset);
2418 Klass* k = java_lang_Class::as_Klass(mirror);
2419 assert(k->oop_is_instance(), "Must be");
2421 // Get the constant pool back from the klass. Since class redefinition
2422 // merges the new constant pool into the old, this is essentially the
2423 // same constant pool as the original. If constant pool merging is
2424 // no longer done in the future, this will have to change to save
2425 // the original.
2426 return InstanceKlass::cast(k)->constants();
2427 }
2429 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2430 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2431 // This null test can be removed post beta
2432 if (k != NULL) {
2433 compute_offset(_base_offset, k,
2434 vmSymbols::base_name(), vmSymbols::object_signature());
2435 }
2436 }
2438 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2439 Klass* k = SystemDictionary::box_klass(type);
2440 if (k == NULL) return NULL;
2441 instanceKlassHandle h (THREAD, k);
2442 if (!h->is_initialized()) h->initialize(CHECK_0);
2443 return h->allocate_instance(THREAD);
2444 }
2447 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2448 oop box = initialize_and_allocate(type, CHECK_0);
2449 if (box == NULL) return NULL;
2450 switch (type) {
2451 case T_BOOLEAN:
2452 box->bool_field_put(value_offset, value->z);
2453 break;
2454 case T_CHAR:
2455 box->char_field_put(value_offset, value->c);
2456 break;
2457 case T_FLOAT:
2458 box->float_field_put(value_offset, value->f);
2459 break;
2460 case T_DOUBLE:
2461 box->double_field_put(long_value_offset, value->d);
2462 break;
2463 case T_BYTE:
2464 box->byte_field_put(value_offset, value->b);
2465 break;
2466 case T_SHORT:
2467 box->short_field_put(value_offset, value->s);
2468 break;
2469 case T_INT:
2470 box->int_field_put(value_offset, value->i);
2471 break;
2472 case T_LONG:
2473 box->long_field_put(long_value_offset, value->j);
2474 break;
2475 default:
2476 return NULL;
2477 }
2478 return box;
2479 }
2482 BasicType java_lang_boxing_object::basic_type(oop box) {
2483 if (box == NULL) return T_ILLEGAL;
2484 BasicType type = SystemDictionary::box_klass_type(box->klass());
2485 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2486 return T_ILLEGAL;
2487 return type;
2488 }
2491 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2492 BasicType type = SystemDictionary::box_klass_type(box->klass());
2493 switch (type) {
2494 case T_BOOLEAN:
2495 value->z = box->bool_field(value_offset);
2496 break;
2497 case T_CHAR:
2498 value->c = box->char_field(value_offset);
2499 break;
2500 case T_FLOAT:
2501 value->f = box->float_field(value_offset);
2502 break;
2503 case T_DOUBLE:
2504 value->d = box->double_field(long_value_offset);
2505 break;
2506 case T_BYTE:
2507 value->b = box->byte_field(value_offset);
2508 break;
2509 case T_SHORT:
2510 value->s = box->short_field(value_offset);
2511 break;
2512 case T_INT:
2513 value->i = box->int_field(value_offset);
2514 break;
2515 case T_LONG:
2516 value->j = box->long_field(long_value_offset);
2517 break;
2518 default:
2519 return T_ILLEGAL;
2520 } // end switch
2521 return type;
2522 }
2525 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2526 BasicType type = SystemDictionary::box_klass_type(box->klass());
2527 switch (type) {
2528 case T_BOOLEAN:
2529 box->bool_field_put(value_offset, value->z);
2530 break;
2531 case T_CHAR:
2532 box->char_field_put(value_offset, value->c);
2533 break;
2534 case T_FLOAT:
2535 box->float_field_put(value_offset, value->f);
2536 break;
2537 case T_DOUBLE:
2538 box->double_field_put(long_value_offset, value->d);
2539 break;
2540 case T_BYTE:
2541 box->byte_field_put(value_offset, value->b);
2542 break;
2543 case T_SHORT:
2544 box->short_field_put(value_offset, value->s);
2545 break;
2546 case T_INT:
2547 box->int_field_put(value_offset, value->i);
2548 break;
2549 case T_LONG:
2550 box->long_field_put(long_value_offset, value->j);
2551 break;
2552 default:
2553 return T_ILLEGAL;
2554 } // end switch
2555 return type;
2556 }
2559 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2560 switch (type) {
2561 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2562 case T_CHAR: st->print("%d", value->c); break;
2563 case T_BYTE: st->print("%d", value->b); break;
2564 case T_SHORT: st->print("%d", value->s); break;
2565 case T_INT: st->print("%d", value->i); break;
2566 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2567 case T_FLOAT: st->print("%f", value->f); break;
2568 case T_DOUBLE: st->print("%lf", value->d); break;
2569 default: st->print("type %d?", type); break;
2570 }
2571 }
2574 // Support for java_lang_ref_Reference
2575 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() {
2576 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2577 address addr = ik->static_field_addr(static_lock_offset);
2578 return (HeapWord*) addr;
2579 }
2581 oop java_lang_ref_Reference::pending_list_lock() {
2582 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2583 address addr = ik->static_field_addr(static_lock_offset);
2584 if (UseCompressedOops) {
2585 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2586 } else {
2587 return oopDesc::load_decode_heap_oop((oop*)addr);
2588 }
2589 }
2591 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2592 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2593 address addr = ik->static_field_addr(static_pending_offset);
2594 // XXX This might not be HeapWord aligned, almost rather be char *.
2595 return (HeapWord*)addr;
2596 }
2598 oop java_lang_ref_Reference::pending_list() {
2599 char *addr = (char *)pending_list_addr();
2600 if (UseCompressedOops) {
2601 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2602 } else {
2603 return oopDesc::load_decode_heap_oop((oop*)addr);
2604 }
2605 }
2608 // Support for java_lang_ref_SoftReference
2610 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2611 return ref->long_field(timestamp_offset);
2612 }
2614 jlong java_lang_ref_SoftReference::clock() {
2615 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2616 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2617 return *offset;
2618 }
2620 void java_lang_ref_SoftReference::set_clock(jlong value) {
2621 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2622 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2623 *offset = value;
2624 }
2626 // Support for java_lang_invoke_DirectMethodHandle
2628 int java_lang_invoke_DirectMethodHandle::_member_offset;
2630 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
2631 oop member_name = NULL;
2632 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
2633 assert(is_dmh, "a DirectMethodHandle oop is expected");
2634 if (is_dmh) {
2635 member_name = dmh->obj_field(member_offset_in_bytes());
2636 }
2637 return member_name;
2638 }
2640 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
2641 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
2642 if (klass_oop != NULL && EnableInvokeDynamic) {
2643 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2644 }
2645 }
2647 // Support for java_lang_invoke_MethodHandle
2649 int java_lang_invoke_MethodHandle::_type_offset;
2650 int java_lang_invoke_MethodHandle::_form_offset;
2652 int java_lang_invoke_MemberName::_clazz_offset;
2653 int java_lang_invoke_MemberName::_name_offset;
2654 int java_lang_invoke_MemberName::_type_offset;
2655 int java_lang_invoke_MemberName::_flags_offset;
2656 int java_lang_invoke_MemberName::_vmtarget_offset;
2657 int java_lang_invoke_MemberName::_vmloader_offset;
2658 int java_lang_invoke_MemberName::_vmindex_offset;
2660 int java_lang_invoke_LambdaForm::_vmentry_offset;
2662 void java_lang_invoke_MethodHandle::compute_offsets() {
2663 Klass* klass_oop = SystemDictionary::MethodHandle_klass();
2664 if (klass_oop != NULL && EnableInvokeDynamic) {
2665 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
2666 compute_optional_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
2667 if (_form_offset == 0) {
2668 EnableInvokeDynamic = false;
2669 }
2670 }
2671 }
2673 void java_lang_invoke_MemberName::compute_offsets() {
2674 Klass* klass_oop = SystemDictionary::MemberName_klass();
2675 if (klass_oop != NULL && EnableInvokeDynamic) {
2676 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature());
2677 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature());
2678 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature());
2679 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature());
2680 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2681 }
2682 }
2684 void java_lang_invoke_LambdaForm::compute_offsets() {
2685 Klass* klass_oop = SystemDictionary::LambdaForm_klass();
2686 if (klass_oop != NULL && EnableInvokeDynamic) {
2687 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2688 }
2689 }
2691 oop java_lang_invoke_MethodHandle::type(oop mh) {
2692 return mh->obj_field(_type_offset);
2693 }
2695 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
2696 mh->obj_field_put(_type_offset, mtype);
2697 }
2699 oop java_lang_invoke_MethodHandle::form(oop mh) {
2700 assert(_form_offset != 0, "");
2701 return mh->obj_field(_form_offset);
2702 }
2704 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
2705 assert(_form_offset != 0, "");
2706 mh->obj_field_put(_form_offset, lform);
2707 }
2709 /// MemberName accessors
2711 oop java_lang_invoke_MemberName::clazz(oop mname) {
2712 assert(is_instance(mname), "wrong type");
2713 return mname->obj_field(_clazz_offset);
2714 }
2716 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
2717 assert(is_instance(mname), "wrong type");
2718 mname->obj_field_put(_clazz_offset, clazz);
2719 }
2721 oop java_lang_invoke_MemberName::name(oop mname) {
2722 assert(is_instance(mname), "wrong type");
2723 return mname->obj_field(_name_offset);
2724 }
2726 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
2727 assert(is_instance(mname), "wrong type");
2728 mname->obj_field_put(_name_offset, name);
2729 }
2731 oop java_lang_invoke_MemberName::type(oop mname) {
2732 assert(is_instance(mname), "wrong type");
2733 return mname->obj_field(_type_offset);
2734 }
2736 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
2737 assert(is_instance(mname), "wrong type");
2738 mname->obj_field_put(_type_offset, type);
2739 }
2741 int java_lang_invoke_MemberName::flags(oop mname) {
2742 assert(is_instance(mname), "wrong type");
2743 return mname->int_field(_flags_offset);
2744 }
2746 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
2747 assert(is_instance(mname), "wrong type");
2748 mname->int_field_put(_flags_offset, flags);
2749 }
2751 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
2752 assert(is_instance(mname), "wrong type");
2753 return (Metadata*)mname->address_field(_vmtarget_offset);
2754 }
2756 #if INCLUDE_JVMTI
2757 // Can be executed on VM thread only
2758 void java_lang_invoke_MemberName::adjust_vmtarget(oop mname, Metadata* ref) {
2759 assert((is_instance(mname) && (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0), "wrong type");
2760 assert(Thread::current()->is_VM_thread(), "not VM thread");
2761 mname->address_field_put(_vmtarget_offset, (address)ref);
2762 }
2763 #endif // INCLUDE_JVMTI
2765 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
2766 assert(is_instance(mname), "wrong type");
2767 // check the type of the vmtarget
2768 oop dependency = NULL;
2769 if (ref != NULL) {
2770 switch (flags(mname) & (MN_IS_METHOD |
2771 MN_IS_CONSTRUCTOR |
2772 MN_IS_FIELD)) {
2773 case MN_IS_METHOD:
2774 case MN_IS_CONSTRUCTOR:
2775 assert(ref->is_method(), "should be a method");
2776 dependency = ((Method*)ref)->method_holder()->java_mirror();
2777 break;
2778 case MN_IS_FIELD:
2779 assert(ref->is_klass(), "should be a class");
2780 dependency = ((Klass*)ref)->java_mirror();
2781 break;
2782 default:
2783 ShouldNotReachHere();
2784 }
2785 }
2786 mname->address_field_put(_vmtarget_offset, (address)ref);
2787 // Add a reference to the loader (actually mirror because anonymous classes will not have
2788 // distinct loaders) to ensure the metadata is kept alive
2789 // This mirror may be different than the one in clazz field.
2790 mname->obj_field_put(_vmloader_offset, dependency);
2791 }
2793 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
2794 assert(is_instance(mname), "wrong type");
2795 return (intptr_t) mname->address_field(_vmindex_offset);
2796 }
2798 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
2799 assert(is_instance(mname), "wrong type");
2800 mname->address_field_put(_vmindex_offset, (address) index);
2801 }
2803 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
2804 assert(is_instance(lform), "wrong type");
2805 return lform->obj_field(_vmentry_offset);
2806 }
2809 // Support for java_lang_invoke_MethodType
2811 int java_lang_invoke_MethodType::_rtype_offset;
2812 int java_lang_invoke_MethodType::_ptypes_offset;
2814 void java_lang_invoke_MethodType::compute_offsets() {
2815 Klass* k = SystemDictionary::MethodType_klass();
2816 if (k != NULL) {
2817 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2818 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2819 }
2820 }
2822 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
2823 st->print("(");
2824 objArrayOop pts = ptypes(mt);
2825 for (int i = 0, limit = pts->length(); i < limit; i++) {
2826 java_lang_Class::print_signature(pts->obj_at(i), st);
2827 }
2828 st->print(")");
2829 java_lang_Class::print_signature(rtype(mt), st);
2830 }
2832 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2833 ResourceMark rm;
2834 stringStream buffer(128);
2835 print_signature(mt, &buffer);
2836 const char* sigstr = buffer.base();
2837 int siglen = (int) buffer.size();
2838 Symbol *name;
2839 if (!intern_if_not_found) {
2840 name = SymbolTable::probe(sigstr, siglen);
2841 } else {
2842 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2843 }
2844 return name;
2845 }
2847 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
2848 if (mt1 == mt2)
2849 return true;
2850 if (rtype(mt1) != rtype(mt2))
2851 return false;
2852 if (ptype_count(mt1) != ptype_count(mt2))
2853 return false;
2854 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
2855 if (ptype(mt1, i) != ptype(mt2, i))
2856 return false;
2857 }
2858 return true;
2859 }
2861 oop java_lang_invoke_MethodType::rtype(oop mt) {
2862 assert(is_instance(mt), "must be a MethodType");
2863 return mt->obj_field(_rtype_offset);
2864 }
2866 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
2867 assert(is_instance(mt), "must be a MethodType");
2868 return (objArrayOop) mt->obj_field(_ptypes_offset);
2869 }
2871 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
2872 return ptypes(mt)->obj_at(idx);
2873 }
2875 int java_lang_invoke_MethodType::ptype_count(oop mt) {
2876 return ptypes(mt)->length();
2877 }
2879 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
2880 objArrayOop pts = ptypes(mt);
2881 int count = pts->length();
2882 int slots = 0;
2883 for (int i = 0; i < count; i++) {
2884 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
2885 slots += type2size[bt];
2886 }
2887 return slots;
2888 }
2890 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
2891 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
2892 return type2size[bt];
2893 }
2896 // Support for java_lang_invoke_CallSite
2898 int java_lang_invoke_CallSite::_target_offset;
2900 void java_lang_invoke_CallSite::compute_offsets() {
2901 if (!EnableInvokeDynamic) return;
2902 Klass* k = SystemDictionary::CallSite_klass();
2903 if (k != NULL) {
2904 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
2905 }
2906 }
2909 // Support for java_security_AccessControlContext
2911 int java_security_AccessControlContext::_context_offset = 0;
2912 int java_security_AccessControlContext::_privilegedContext_offset = 0;
2913 int java_security_AccessControlContext::_isPrivileged_offset = 0;
2914 int java_security_AccessControlContext::_isAuthorized_offset = -1;
2916 void java_security_AccessControlContext::compute_offsets() {
2917 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
2918 fieldDescriptor fd;
2919 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass());
2921 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
2922 fatal("Invalid layout of java.security.AccessControlContext");
2923 }
2924 _context_offset = fd.offset();
2926 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
2927 fatal("Invalid layout of java.security.AccessControlContext");
2928 }
2929 _privilegedContext_offset = fd.offset();
2931 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
2932 fatal("Invalid layout of java.security.AccessControlContext");
2933 }
2934 _isPrivileged_offset = fd.offset();
2936 // The offset may not be present for bootstrapping with older JDK.
2937 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
2938 _isAuthorized_offset = fd.offset();
2939 }
2940 }
2943 bool java_security_AccessControlContext::is_authorized(Handle context) {
2944 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
2945 assert(_isAuthorized_offset != -1, "should be set");
2946 return context->bool_field(_isAuthorized_offset) != 0;
2947 }
2949 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
2950 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
2951 // Ensure klass is initialized
2952 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
2953 // Allocate result
2954 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
2955 // Fill in values
2956 result->obj_field_put(_context_offset, context());
2957 result->obj_field_put(_privilegedContext_offset, privileged_context());
2958 result->bool_field_put(_isPrivileged_offset, isPrivileged);
2959 // whitelist AccessControlContexts created by the JVM if present
2960 if (_isAuthorized_offset != -1) {
2961 result->bool_field_put(_isAuthorized_offset, true);
2962 }
2963 return result;
2964 }
2967 // Support for java_lang_ClassLoader
2969 bool java_lang_ClassLoader::offsets_computed = false;
2970 int java_lang_ClassLoader::_loader_data_offset = -1;
2971 int java_lang_ClassLoader::parallelCapable_offset = -1;
2973 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
2974 assert(loader != NULL && loader->is_oop(), "loader must be oop");
2975 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
2976 }
2978 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
2979 return *java_lang_ClassLoader::loader_data_addr(loader);
2980 }
2982 void java_lang_ClassLoader::compute_offsets() {
2983 assert(!offsets_computed, "offsets should be initialized only once");
2984 offsets_computed = true;
2986 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
2987 Klass* k1 = SystemDictionary::ClassLoader_klass();
2988 compute_optional_offset(parallelCapable_offset,
2989 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
2991 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2992 }
2994 oop java_lang_ClassLoader::parent(oop loader) {
2995 assert(is_instance(loader), "loader must be oop");
2996 return loader->obj_field(parent_offset);
2997 }
2999 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3000 assert(is_instance(loader), "loader must be oop");
3001 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3002 oop acl = loader;
3003 debug_only(jint loop_count = 0);
3004 // This loop taken verbatim from ClassLoader.java:
3005 do {
3006 acl = parent(acl);
3007 if (cl == acl) {
3008 return true;
3009 }
3010 assert(++loop_count > 0, "loop_count overflow");
3011 } while (acl != NULL);
3012 return false;
3013 }
3016 // For class loader classes, parallelCapable defined
3017 // based on non-null field
3018 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3019 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3020 if (!JDK_Version::is_gte_jdk17x_version()
3021 || parallelCapable_offset == -1) {
3022 // Default for backward compatibility is false
3023 return false;
3024 }
3025 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3026 }
3028 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3029 // Fix for 4474172; see evaluation for more details
3030 loader = non_reflection_class_loader(loader);
3032 oop cl = SystemDictionary::java_system_loader();
3033 while(cl != NULL) {
3034 if (cl == loader) return true;
3035 cl = parent(cl);
3036 }
3037 return false;
3038 }
3040 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3041 if (loader != NULL) {
3042 // See whether this is one of the class loaders associated with
3043 // the generated bytecodes for reflection, and if so, "magically"
3044 // delegate to its parent to prevent class loading from occurring
3045 // in places where applications using reflection didn't expect it.
3046 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3047 // This might be null in non-1.4 JDKs
3048 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
3049 return parent(loader);
3050 }
3051 }
3052 return loader;
3053 }
3056 // Support for java_lang_System
3057 int java_lang_System::in_offset_in_bytes() {
3058 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3059 }
3062 int java_lang_System::out_offset_in_bytes() {
3063 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3064 }
3067 int java_lang_System::err_offset_in_bytes() {
3068 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3069 }
3072 bool java_lang_System::has_security_manager() {
3073 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass());
3074 address addr = ik->static_field_addr(static_security_offset);
3075 if (UseCompressedOops) {
3076 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3077 } else {
3078 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3079 }
3080 }
3082 int java_lang_Class::_klass_offset;
3083 int java_lang_Class::_array_klass_offset;
3084 int java_lang_Class::_oop_size_offset;
3085 int java_lang_Class::_static_oop_field_count_offset;
3086 int java_lang_Class::_protection_domain_offset;
3087 int java_lang_Class::_init_lock_offset;
3088 int java_lang_Class::_signers_offset;
3089 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3090 int java_lang_Throwable::backtrace_offset;
3091 int java_lang_Throwable::detailMessage_offset;
3092 int java_lang_Throwable::cause_offset;
3093 int java_lang_Throwable::stackTrace_offset;
3094 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3095 int java_lang_reflect_AccessibleObject::override_offset;
3096 int java_lang_reflect_Method::clazz_offset;
3097 int java_lang_reflect_Method::name_offset;
3098 int java_lang_reflect_Method::returnType_offset;
3099 int java_lang_reflect_Method::parameterTypes_offset;
3100 int java_lang_reflect_Method::exceptionTypes_offset;
3101 int java_lang_reflect_Method::slot_offset;
3102 int java_lang_reflect_Method::modifiers_offset;
3103 int java_lang_reflect_Method::signature_offset;
3104 int java_lang_reflect_Method::annotations_offset;
3105 int java_lang_reflect_Method::parameter_annotations_offset;
3106 int java_lang_reflect_Method::annotation_default_offset;
3107 int java_lang_reflect_Method::type_annotations_offset;
3108 int java_lang_reflect_Constructor::clazz_offset;
3109 int java_lang_reflect_Constructor::parameterTypes_offset;
3110 int java_lang_reflect_Constructor::exceptionTypes_offset;
3111 int java_lang_reflect_Constructor::slot_offset;
3112 int java_lang_reflect_Constructor::modifiers_offset;
3113 int java_lang_reflect_Constructor::signature_offset;
3114 int java_lang_reflect_Constructor::annotations_offset;
3115 int java_lang_reflect_Constructor::parameter_annotations_offset;
3116 int java_lang_reflect_Constructor::type_annotations_offset;
3117 int java_lang_reflect_Field::clazz_offset;
3118 int java_lang_reflect_Field::name_offset;
3119 int java_lang_reflect_Field::type_offset;
3120 int java_lang_reflect_Field::slot_offset;
3121 int java_lang_reflect_Field::modifiers_offset;
3122 int java_lang_reflect_Field::signature_offset;
3123 int java_lang_reflect_Field::annotations_offset;
3124 int java_lang_reflect_Field::type_annotations_offset;
3125 int java_lang_reflect_Parameter::name_offset;
3126 int java_lang_reflect_Parameter::modifiers_offset;
3127 int java_lang_reflect_Parameter::index_offset;
3128 int java_lang_reflect_Parameter::executable_offset;
3129 int java_lang_boxing_object::value_offset;
3130 int java_lang_boxing_object::long_value_offset;
3131 int java_lang_ref_Reference::referent_offset;
3132 int java_lang_ref_Reference::queue_offset;
3133 int java_lang_ref_Reference::next_offset;
3134 int java_lang_ref_Reference::discovered_offset;
3135 int java_lang_ref_Reference::static_lock_offset;
3136 int java_lang_ref_Reference::static_pending_offset;
3137 int java_lang_ref_Reference::number_of_fake_oop_fields;
3138 int java_lang_ref_SoftReference::timestamp_offset;
3139 int java_lang_ref_SoftReference::static_clock_offset;
3140 int java_lang_ClassLoader::parent_offset;
3141 int java_lang_System::static_in_offset;
3142 int java_lang_System::static_out_offset;
3143 int java_lang_System::static_err_offset;
3144 int java_lang_System::static_security_offset;
3145 int java_lang_StackTraceElement::declaringClass_offset;
3146 int java_lang_StackTraceElement::methodName_offset;
3147 int java_lang_StackTraceElement::fileName_offset;
3148 int java_lang_StackTraceElement::lineNumber_offset;
3149 int java_lang_AssertionStatusDirectives::classes_offset;
3150 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3151 int java_lang_AssertionStatusDirectives::packages_offset;
3152 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3153 int java_lang_AssertionStatusDirectives::deflt_offset;
3154 int java_nio_Buffer::_limit_offset;
3155 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3156 int sun_reflect_ConstantPool::_oop_offset;
3157 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3160 // Support for java_lang_StackTraceElement
3162 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3163 element->obj_field_put(fileName_offset, value);
3164 }
3166 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3167 element->obj_field_put(declaringClass_offset, value);
3168 }
3170 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3171 element->obj_field_put(methodName_offset, value);
3172 }
3174 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3175 element->int_field_put(lineNumber_offset, value);
3176 }
3179 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3181 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3182 o->obj_field_put(classes_offset, val);
3183 }
3185 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3186 o->obj_field_put(classEnabled_offset, val);
3187 }
3189 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3190 o->obj_field_put(packages_offset, val);
3191 }
3193 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3194 o->obj_field_put(packageEnabled_offset, val);
3195 }
3197 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3198 o->bool_field_put(deflt_offset, val);
3199 }
3202 // Support for intrinsification of java.nio.Buffer.checkIndex
3203 int java_nio_Buffer::limit_offset() {
3204 return _limit_offset;
3205 }
3208 void java_nio_Buffer::compute_offsets() {
3209 Klass* k = SystemDictionary::nio_Buffer_klass();
3210 assert(k != NULL, "must be loaded in 1.4+");
3211 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3212 }
3214 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3215 if (_owner_offset != 0) return;
3217 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
3218 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3219 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3220 compute_offset(_owner_offset, k,
3221 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3222 }
3224 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3225 assert(_owner_offset != 0, "Must be initialized");
3226 return obj->obj_field(_owner_offset);
3227 }
3229 // Compute hard-coded offsets
3230 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3231 // are not available to determine the offset_of_static_fields.
3232 void JavaClasses::compute_hard_coded_offsets() {
3233 const int x = heapOopSize;
3234 const int header = instanceOopDesc::base_offset_in_bytes();
3236 // Throwable Class
3237 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
3238 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3239 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
3240 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3241 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x;
3243 // java_lang_boxing_object
3244 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3245 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3247 // java_lang_ref_Reference:
3248 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3249 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3250 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
3251 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
3252 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
3253 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3254 // Artificial fields for java_lang_ref_Reference
3255 // The first field is for the discovered field added in 1.4
3256 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3258 // java_lang_ref_SoftReference Class
3259 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3260 // Don't multiply static fields because they are always in wordSize units
3261 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3263 // java_lang_ClassLoader
3264 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3266 // java_lang_System
3267 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
3268 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3269 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3270 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3272 // java_lang_StackTraceElement
3273 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
3274 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3275 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
3276 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3277 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3278 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3279 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3280 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3281 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3283 }
3286 // Compute non-hard-coded field offsets of all the classes in this file
3287 void JavaClasses::compute_offsets() {
3288 // java_lang_Class::compute_offsets was called earlier in bootstrap
3289 java_lang_ClassLoader::compute_offsets();
3290 java_lang_Thread::compute_offsets();
3291 java_lang_ThreadGroup::compute_offsets();
3292 if (EnableInvokeDynamic) {
3293 java_lang_invoke_MethodHandle::compute_offsets();
3294 java_lang_invoke_DirectMethodHandle::compute_offsets();
3295 java_lang_invoke_MemberName::compute_offsets();
3296 java_lang_invoke_LambdaForm::compute_offsets();
3297 java_lang_invoke_MethodType::compute_offsets();
3298 java_lang_invoke_CallSite::compute_offsets();
3299 }
3300 java_security_AccessControlContext::compute_offsets();
3301 // Initialize reflection classes. The layouts of these classes
3302 // changed with the new reflection implementation in JDK 1.4, and
3303 // since the Universe doesn't know what JDK version it is until this
3304 // point we defer computation of these offsets until now.
3305 java_lang_reflect_AccessibleObject::compute_offsets();
3306 java_lang_reflect_Method::compute_offsets();
3307 java_lang_reflect_Constructor::compute_offsets();
3308 java_lang_reflect_Field::compute_offsets();
3309 if (JDK_Version::is_gte_jdk14x_version()) {
3310 java_nio_Buffer::compute_offsets();
3311 }
3312 if (JDK_Version::is_gte_jdk15x_version()) {
3313 sun_reflect_ConstantPool::compute_offsets();
3314 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3315 }
3316 if (JDK_Version::is_jdk18x_version())
3317 java_lang_reflect_Parameter::compute_offsets();
3319 // generated interpreter code wants to know about the offsets we just computed:
3320 AbstractAssembler::update_delayed_values();
3321 }
3323 #ifndef PRODUCT
3325 // These functions exist to assert the validity of hard-coded field offsets to guard
3326 // against changes in the class files
3328 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3329 EXCEPTION_MARK;
3330 fieldDescriptor fd;
3331 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3332 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3333 instanceKlassHandle h_klass (THREAD, k);
3334 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3335 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3336 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3337 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3338 return false;
3339 }
3340 if (fd.is_static()) {
3341 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3342 return false;
3343 }
3344 if (fd.offset() == hardcoded_offset ) {
3345 return true;
3346 } else {
3347 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3348 klass_name, field_name, hardcoded_offset, fd.offset());
3349 return false;
3350 }
3351 }
3354 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3355 EXCEPTION_MARK;
3356 fieldDescriptor fd;
3357 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3358 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3359 instanceKlassHandle h_klass (THREAD, k);
3360 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3361 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3362 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3363 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3364 return false;
3365 }
3366 if (!fd.is_static()) {
3367 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3368 return false;
3369 }
3370 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3371 return true;
3372 } else {
3373 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());
3374 return false;
3375 }
3376 }
3379 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3380 EXCEPTION_MARK;
3381 fieldDescriptor fd;
3382 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3383 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3384 instanceKlassHandle h_klass (THREAD, k);
3385 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3386 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3387 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3388 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3389 return false;
3390 }
3391 if (!fd.is_static() || !fd.has_initial_value()) {
3392 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3393 return false;
3394 }
3395 if (!fd.initial_value_tag().is_int()) {
3396 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3397 return false;
3398 }
3399 jint field_value = fd.int_initial_value();
3400 if (field_value == hardcoded_constant) {
3401 return true;
3402 } else {
3403 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);
3404 return false;
3405 }
3406 }
3409 // Check the hard-coded field offsets of all the classes in this file
3411 void JavaClasses::check_offsets() {
3412 bool valid = true;
3413 HandleMark hm;
3415 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3416 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3418 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3419 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3421 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3422 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3424 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3425 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3427 // java.lang.String
3429 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3430 if (java_lang_String::has_offset_field()) {
3431 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3432 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3433 }
3434 if (java_lang_String::has_hash_field()) {
3435 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3436 }
3438 // java.lang.Class
3440 // Fake fields
3441 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3442 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3444 // java.lang.Throwable
3446 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3447 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3448 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3449 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3451 // Boxed primitive objects (java_lang_boxing_object)
3453 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3454 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3455 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3456 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3457 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3458 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3459 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3460 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3462 // java.lang.ClassLoader
3464 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3466 // java.lang.System
3468 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3469 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3470 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3471 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
3473 // java.lang.StackTraceElement
3475 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3476 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3477 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3478 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3480 // java.lang.ref.Reference
3482 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3483 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3484 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3485 // Fake field
3486 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3487 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3488 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3490 // java.lang.ref.SoftReference
3492 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3493 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3495 // java.lang.AssertionStatusDirectives
3496 //
3497 // The CheckAssertionStatusDirectives boolean can be removed from here and
3498 // globals.hpp after the AssertionStatusDirectives class has been integrated
3499 // into merlin "for some time." Without it, the vm will fail with early
3500 // merlin builds.
3502 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) {
3503 const char* nm = "java/lang/AssertionStatusDirectives";
3504 const char* sig = "[Ljava/lang/String;";
3505 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3506 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3507 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3508 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3509 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3510 }
3512 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3513 }
3515 #endif // PRODUCT
3517 int InjectedField::compute_offset() {
3518 Klass* klass_oop = klass();
3519 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3520 if (!may_be_java && !fs.access_flags().is_internal()) {
3521 // Only look at injected fields
3522 continue;
3523 }
3524 if (fs.name() == name() && fs.signature() == signature()) {
3525 return fs.offset();
3526 }
3527 }
3528 ResourceMark rm;
3529 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)" : "");
3530 #ifndef PRODUCT
3531 klass_oop->print();
3532 tty->print_cr("all fields:");
3533 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3534 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
3535 }
3536 #endif //PRODUCT
3537 fatal("Invalid layout of preloaded class");
3538 return -1;
3539 }
3541 void javaClasses_init() {
3542 JavaClasses::compute_offsets();
3543 JavaClasses::check_offsets();
3544 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3545 }