Wed, 08 Apr 2015 14:20:09 -0700
8067662: "java.lang.NullPointerException: Method name is null" from StackTraceElement.<init>
Summary: use method cpref and klass version to provide meaningful methods name in stacktraces
Reviewed-by: coleenp, dcubed
1 /*
2 * Copyright (c) 1997, 2015, 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 "prims/jvmtiRedefineClassesTrace.hpp"
45 #include "runtime/fieldDescriptor.hpp"
46 #include "runtime/handles.inline.hpp"
47 #include "runtime/interfaceSupport.hpp"
48 #include "runtime/java.hpp"
49 #include "runtime/javaCalls.hpp"
50 #include "runtime/safepoint.hpp"
51 #include "runtime/thread.inline.hpp"
52 #include "runtime/vframe.hpp"
53 #include "utilities/preserveException.hpp"
55 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
57 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
58 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
60 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
61 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
63 InjectedField JavaClasses::_injected_fields[] = {
64 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
65 };
67 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
68 return _injected_fields[id].compute_offset();
69 }
72 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
73 *field_count = 0;
75 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
76 if (sid == vmSymbols::NO_SID) {
77 // Only well known classes can inject fields
78 return NULL;
79 }
81 int count = 0;
82 int start = -1;
84 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
85 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
86 count++; \
87 if (start == -1) start = klass##_##name##_enum; \
88 }
89 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
90 #undef LOOKUP_INJECTED_FIELD
92 if (start != -1) {
93 *field_count = count;
94 return _injected_fields + start;
95 }
96 return NULL;
97 }
100 static bool find_field(InstanceKlass* ik,
101 Symbol* name_symbol, Symbol* signature_symbol,
102 fieldDescriptor* fd,
103 bool allow_super = false) {
104 if (allow_super)
105 return ik->find_field(name_symbol, signature_symbol, fd) != NULL;
106 else
107 return ik->find_local_field(name_symbol, signature_symbol, fd);
108 }
110 // Helpful routine for computing field offsets at run time rather than hardcoding them
111 static void
112 compute_offset(int &dest_offset,
113 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
114 bool allow_super = false) {
115 fieldDescriptor fd;
116 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
117 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
118 ResourceMark rm;
119 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
120 #ifndef PRODUCT
121 klass_oop->print();
122 tty->print_cr("all fields:");
123 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
124 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
125 }
126 #endif //PRODUCT
127 fatal("Invalid layout of preloaded class");
128 }
129 dest_offset = fd.offset();
130 }
132 // Same as above but for "optional" offsets that might not be present in certain JDK versions
133 static void
134 compute_optional_offset(int& dest_offset,
135 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
136 bool allow_super = false) {
137 fieldDescriptor fd;
138 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
139 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
140 dest_offset = fd.offset();
141 }
142 }
145 int java_lang_String::value_offset = 0;
146 int java_lang_String::offset_offset = 0;
147 int java_lang_String::count_offset = 0;
148 int java_lang_String::hash_offset = 0;
150 bool java_lang_String::initialized = false;
152 void java_lang_String::compute_offsets() {
153 assert(!initialized, "offsets should be initialized only once");
155 Klass* k = SystemDictionary::String_klass();
156 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature());
157 compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature());
158 compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature());
159 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature());
161 initialized = true;
162 }
164 Handle java_lang_String::basic_create(int length, TRAPS) {
165 assert(initialized, "Must be initialized");
166 // Create the String object first, so there's a chance that the String
167 // and the char array it points to end up in the same cache line.
168 oop obj;
169 obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH);
171 // Create the char array. The String object must be handlized here
172 // because GC can happen as a result of the allocation attempt.
173 Handle h_obj(THREAD, obj);
174 typeArrayOop buffer;
175 buffer = oopFactory::new_charArray(length, CHECK_NH);
177 // Point the String at the char array
178 obj = h_obj();
179 set_value(obj, buffer);
180 // No need to zero the offset, allocation zero'ed the entire String object
181 assert(offset(obj) == 0, "initial String offset should be zero");
182 //set_offset(obj, 0);
183 set_count(obj, length);
185 return h_obj;
186 }
188 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
189 Handle h_obj = basic_create(length, CHECK_NH);
190 typeArrayOop buffer = value(h_obj());
191 for (int index = 0; index < length; index++) {
192 buffer->char_at_put(index, unicode[index]);
193 }
194 return h_obj;
195 }
197 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
198 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
199 return h_obj();
200 }
202 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
203 if (utf8_str == NULL) {
204 return Handle();
205 }
206 int length = UTF8::unicode_length(utf8_str);
207 Handle h_obj = basic_create(length, CHECK_NH);
208 if (length > 0) {
209 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
210 }
211 return h_obj;
212 }
214 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
215 Handle h_obj = create_from_str(utf8_str, CHECK_0);
216 return h_obj();
217 }
219 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
220 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
221 Handle h_obj = basic_create(length, CHECK_NH);
222 if (length > 0) {
223 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
224 }
225 return h_obj;
226 }
228 // Converts a C string to a Java String based on current encoding
229 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
230 assert(str != NULL, "bad arguments");
232 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
233 static to_java_string_fn_t _to_java_string_fn = NULL;
235 if (_to_java_string_fn == NULL) {
236 void *lib_handle = os::native_java_library();
237 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
238 if (_to_java_string_fn == NULL) {
239 fatal("NewStringPlatform missing");
240 }
241 }
243 jstring js = NULL;
244 { JavaThread* thread = (JavaThread*)THREAD;
245 assert(thread->is_Java_thread(), "must be java thread");
246 HandleMark hm(thread);
247 ThreadToNativeFromVM ttn(thread);
248 js = (_to_java_string_fn)(thread->jni_environment(), str);
249 }
250 return Handle(THREAD, JNIHandles::resolve(js));
251 }
253 // Converts a Java String to a native C string that can be used for
254 // native OS calls.
255 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
257 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
258 static to_platform_string_fn_t _to_platform_string_fn = NULL;
260 if (_to_platform_string_fn == NULL) {
261 void *lib_handle = os::native_java_library();
262 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
263 if (_to_platform_string_fn == NULL) {
264 fatal("GetStringPlatformChars missing");
265 }
266 }
268 char *native_platform_string;
269 { JavaThread* thread = (JavaThread*)THREAD;
270 assert(thread->is_Java_thread(), "must be java thread");
271 JNIEnv *env = thread->jni_environment();
272 jstring js = (jstring) JNIHandles::make_local(env, java_string());
273 bool is_copy;
274 HandleMark hm(thread);
275 ThreadToNativeFromVM ttn(thread);
276 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
277 assert(is_copy == JNI_TRUE, "is_copy value changed");
278 JNIHandles::destroy_local(js);
279 }
280 return native_platform_string;
281 }
283 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
284 oop obj = java_string();
285 // Typical usage is to convert all '/' to '.' in string.
286 typeArrayOop value = java_lang_String::value(obj);
287 int offset = java_lang_String::offset(obj);
288 int length = java_lang_String::length(obj);
290 // First check if any from_char exist
291 int index; // Declared outside, used later
292 for (index = 0; index < length; index++) {
293 if (value->char_at(index + offset) == from_char) {
294 break;
295 }
296 }
297 if (index == length) {
298 // No from_char, so do not copy.
299 return java_string;
300 }
302 // Create new UNICODE buffer. Must handlize value because GC
303 // may happen during String and char array creation.
304 typeArrayHandle h_value(THREAD, value);
305 Handle string = basic_create(length, CHECK_NH);
307 typeArrayOop from_buffer = h_value();
308 typeArrayOop to_buffer = java_lang_String::value(string());
310 // Copy contents
311 for (index = 0; index < length; index++) {
312 jchar c = from_buffer->char_at(index + offset);
313 if (c == from_char) {
314 c = to_char;
315 }
316 to_buffer->char_at_put(index, c);
317 }
318 return string;
319 }
321 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
322 typeArrayOop value = java_lang_String::value(java_string);
323 int offset = java_lang_String::offset(java_string);
324 length = java_lang_String::length(java_string);
326 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
327 if (result != NULL) {
328 for (int index = 0; index < length; index++) {
329 result[index] = value->char_at(index + offset);
330 }
331 } else {
332 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
333 }
334 return result;
335 }
337 unsigned int java_lang_String::hash_code(oop java_string) {
338 int length = java_lang_String::length(java_string);
339 // Zero length string will hash to zero with String.hashCode() function.
340 if (length == 0) return 0;
342 typeArrayOop value = java_lang_String::value(java_string);
343 int offset = java_lang_String::offset(java_string);
344 return java_lang_String::hash_code(value->char_at_addr(offset), length);
345 }
347 char* java_lang_String::as_quoted_ascii(oop java_string) {
348 typeArrayOop value = java_lang_String::value(java_string);
349 int offset = java_lang_String::offset(java_string);
350 int length = java_lang_String::length(java_string);
352 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
353 if (base == NULL) return NULL;
355 int result_length = UNICODE::quoted_ascii_length(base, length) + 1;
356 char* result = NEW_RESOURCE_ARRAY(char, result_length);
357 UNICODE::as_quoted_ascii(base, length, result, result_length);
358 assert(result_length >= length + 1, "must not be shorter");
359 assert(result_length == (int)strlen(result) + 1, "must match");
360 return result;
361 }
363 unsigned int java_lang_String::hash_string(oop java_string) {
364 int length = java_lang_String::length(java_string);
365 // Zero length string doesn't hash necessarily hash to zero.
366 if (length == 0) {
367 return StringTable::hash_string(NULL, 0);
368 }
370 typeArrayOop value = java_lang_String::value(java_string);
371 int offset = java_lang_String::offset(java_string);
372 return StringTable::hash_string(value->char_at_addr(offset), length);
373 }
375 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {
376 oop obj = java_string();
377 typeArrayOop value = java_lang_String::value(obj);
378 int offset = java_lang_String::offset(obj);
379 int length = java_lang_String::length(obj);
380 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
381 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
382 return sym;
383 }
385 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
386 typeArrayOop value = java_lang_String::value(java_string);
387 int offset = java_lang_String::offset(java_string);
388 int length = java_lang_String::length(java_string);
389 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
390 return SymbolTable::probe_unicode(base, length);
391 }
394 int java_lang_String::utf8_length(oop java_string) {
395 typeArrayOop value = java_lang_String::value(java_string);
396 int offset = java_lang_String::offset(java_string);
397 int length = java_lang_String::length(java_string);
398 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
399 return UNICODE::utf8_length(position, length);
400 }
402 char* java_lang_String::as_utf8_string(oop java_string) {
403 typeArrayOop value = java_lang_String::value(java_string);
404 int offset = java_lang_String::offset(java_string);
405 int length = java_lang_String::length(java_string);
406 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
407 return UNICODE::as_utf8(position, length);
408 }
410 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
411 typeArrayOop value = java_lang_String::value(java_string);
412 int offset = java_lang_String::offset(java_string);
413 int length = java_lang_String::length(java_string);
414 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
415 return UNICODE::as_utf8(position, length, buf, buflen);
416 }
418 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
419 typeArrayOop value = java_lang_String::value(java_string);
420 int offset = java_lang_String::offset(java_string);
421 int length = java_lang_String::length(java_string);
422 assert(start + len <= length, "just checking");
423 jchar* position = value->char_at_addr(offset + start);
424 return UNICODE::as_utf8(position, len);
425 }
427 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
428 assert(java_string->klass() == SystemDictionary::String_klass(),
429 "must be java_string");
430 typeArrayOop value = java_lang_String::value(java_string);
431 int offset = java_lang_String::offset(java_string);
432 int length = java_lang_String::length(java_string);
433 if (length != len) {
434 return false;
435 }
436 for (int i = 0; i < len; i++) {
437 if (value->char_at(i + offset) != chars[i]) {
438 return false;
439 }
440 }
441 return true;
442 }
444 bool java_lang_String::equals(oop str1, oop str2) {
445 assert(str1->klass() == SystemDictionary::String_klass(),
446 "must be java String");
447 assert(str2->klass() == SystemDictionary::String_klass(),
448 "must be java String");
449 typeArrayOop value1 = java_lang_String::value(str1);
450 int offset1 = java_lang_String::offset(str1);
451 int length1 = java_lang_String::length(str1);
452 typeArrayOop value2 = java_lang_String::value(str2);
453 int offset2 = java_lang_String::offset(str2);
454 int length2 = java_lang_String::length(str2);
456 if (length1 != length2) {
457 return false;
458 }
459 for (int i = 0; i < length1; i++) {
460 if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) {
461 return false;
462 }
463 }
464 return true;
465 }
467 void java_lang_String::print(oop java_string, outputStream* st) {
468 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
469 typeArrayOop value = java_lang_String::value(java_string);
470 int offset = java_lang_String::offset(java_string);
471 int length = java_lang_String::length(java_string);
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), 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 class_loader,
573 Handle protection_domain, TRAPS) {
574 assert(k->java_mirror() == NULL, "should only assign mirror once");
575 // Use this moment of initialization to cache modifier_flags also,
576 // to support Class.getModifiers(). Instance classes recalculate
577 // the cached flags after the class file is parsed, but before the
578 // class is put into the system dictionary.
579 int computed_modifiers = k->compute_modifier_flags(CHECK);
580 k->set_modifier_flags(computed_modifiers);
581 // Class_klass has to be loaded because it is used to allocate
582 // the mirror.
583 if (SystemDictionary::Class_klass_loaded()) {
584 // Allocate mirror (java.lang.Class instance)
585 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
587 // Setup indirection from mirror->klass
588 if (!k.is_null()) {
589 java_lang_Class::set_klass(mirror(), k());
590 }
592 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
593 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
595 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
597 // It might also have a component mirror. This mirror must already exist.
598 if (k->oop_is_array()) {
599 Handle comp_mirror;
600 if (k->oop_is_typeArray()) {
601 BasicType type = TypeArrayKlass::cast(k())->element_type();
602 comp_mirror = Universe::java_mirror(type);
603 } else {
604 assert(k->oop_is_objArray(), "Must be");
605 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass();
606 assert(element_klass != NULL, "Must have an element klass");
607 comp_mirror = element_klass->java_mirror();
608 }
609 assert(comp_mirror.not_null(), "must have a mirror");
611 // Two-way link between the array klass and its component mirror:
612 ArrayKlass::cast(k())->set_component_mirror(comp_mirror());
613 set_array_klass(comp_mirror(), k());
614 } else {
615 assert(k->oop_is_instance(), "Must be");
617 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
618 if (HAS_PENDING_EXCEPTION) {
619 // If any of the fields throws an exception like OOM remove the klass field
620 // from the mirror so GC doesn't follow it after the klass has been deallocated.
621 // This mirror looks like a primitive type, which logically it is because it
622 // it represents no class.
623 java_lang_Class::set_klass(mirror(), NULL);
624 return;
625 }
626 }
628 // set the classLoader field in the java_lang_Class instance
629 assert(class_loader() == k->class_loader(), "should be same");
630 set_class_loader(mirror(), class_loader());
632 // Setup indirection from klass->mirror last
633 // after any exceptions can happen during allocations.
634 if (!k.is_null()) {
635 k->set_java_mirror(mirror());
636 }
637 } else {
638 if (fixup_mirror_list() == NULL) {
639 GrowableArray<Klass*>* list =
640 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
641 set_fixup_mirror_list(list);
642 }
643 fixup_mirror_list()->push(k());
644 }
645 }
648 int java_lang_Class::oop_size(oop java_class) {
649 assert(_oop_size_offset != 0, "must be set");
650 return java_class->int_field(_oop_size_offset);
651 }
652 void java_lang_Class::set_oop_size(oop java_class, int size) {
653 assert(_oop_size_offset != 0, "must be set");
654 java_class->int_field_put(_oop_size_offset, size);
655 }
656 int java_lang_Class::static_oop_field_count(oop java_class) {
657 assert(_static_oop_field_count_offset != 0, "must be set");
658 return java_class->int_field(_static_oop_field_count_offset);
659 }
660 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
661 assert(_static_oop_field_count_offset != 0, "must be set");
662 java_class->int_field_put(_static_oop_field_count_offset, size);
663 }
665 oop java_lang_Class::protection_domain(oop java_class) {
666 assert(_protection_domain_offset != 0, "must be set");
667 return java_class->obj_field(_protection_domain_offset);
668 }
669 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
670 assert(_protection_domain_offset != 0, "must be set");
671 java_class->obj_field_put(_protection_domain_offset, pd);
672 }
674 oop java_lang_Class::init_lock(oop java_class) {
675 assert(_init_lock_offset != 0, "must be set");
676 return java_class->obj_field(_init_lock_offset);
677 }
678 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
679 assert(_init_lock_offset != 0, "must be set");
680 java_class->obj_field_put(_init_lock_offset, init_lock);
681 }
683 objArrayOop java_lang_Class::signers(oop java_class) {
684 assert(_signers_offset != 0, "must be set");
685 return (objArrayOop)java_class->obj_field(_signers_offset);
686 }
687 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
688 assert(_signers_offset != 0, "must be set");
689 java_class->obj_field_put(_signers_offset, (oop)signers);
690 }
693 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
694 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
695 if (_class_loader_offset != 0) {
696 java_class->obj_field_put(_class_loader_offset, loader);
697 }
698 }
700 oop java_lang_Class::class_loader(oop java_class) {
701 assert(_class_loader_offset != 0, "must be set");
702 return java_class->obj_field(_class_loader_offset);
703 }
705 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
706 // This should be improved by adding a field at the Java level or by
707 // introducing a new VM klass (see comment in ClassFileParser)
708 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
709 if (type != T_VOID) {
710 Klass* aklass = Universe::typeArrayKlassObj(type);
711 assert(aklass != NULL, "correct bootstrap");
712 set_array_klass(java_class, aklass);
713 }
714 #ifdef ASSERT
715 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
716 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
717 #endif
718 return java_class;
719 }
722 Klass* java_lang_Class::as_Klass(oop java_class) {
723 //%note memory_2
724 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
725 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
726 assert(k == NULL || k->is_klass(), "type check");
727 return k;
728 }
731 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
732 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
733 java_class->metadata_field_put(_klass_offset, klass);
734 }
737 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
738 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
739 Symbol* name = NULL;
740 bool is_instance = false;
741 if (is_primitive(java_class)) {
742 name = vmSymbols::type_signature(primitive_type(java_class));
743 } else {
744 Klass* k = as_Klass(java_class);
745 is_instance = k->oop_is_instance();
746 name = k->name();
747 }
748 if (name == NULL) {
749 st->print("<null>");
750 return;
751 }
752 if (is_instance) st->print("L");
753 st->write((char*) name->base(), (int) name->utf8_length());
754 if (is_instance) st->print(";");
755 }
757 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
758 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
759 Symbol* name;
760 if (is_primitive(java_class)) {
761 name = vmSymbols::type_signature(primitive_type(java_class));
762 // Because this can create a new symbol, the caller has to decrement
763 // the refcount, so make adjustment here and below for symbols returned
764 // that are not created or incremented due to a successful lookup.
765 name->increment_refcount();
766 } else {
767 Klass* k = as_Klass(java_class);
768 if (!k->oop_is_instance()) {
769 name = k->name();
770 name->increment_refcount();
771 } else {
772 ResourceMark rm;
773 const char* sigstr = k->signature_name();
774 int siglen = (int) strlen(sigstr);
775 if (!intern_if_not_found) {
776 name = SymbolTable::probe(sigstr, siglen);
777 } else {
778 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
779 }
780 }
781 }
782 return name;
783 }
786 Klass* java_lang_Class::array_klass(oop java_class) {
787 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
788 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass");
789 return k;
790 }
793 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
794 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass");
795 java_class->metadata_field_put(_array_klass_offset, klass);
796 }
799 bool java_lang_Class::is_primitive(oop java_class) {
800 // should assert:
801 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
802 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
804 #ifdef ASSERT
805 if (is_primitive) {
806 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
807 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
808 "Should be either the T_VOID primitive or a java primitive");
809 }
810 #endif
812 return is_primitive;
813 }
816 BasicType java_lang_Class::primitive_type(oop java_class) {
817 assert(java_lang_Class::is_primitive(java_class), "just checking");
818 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
819 BasicType type = T_VOID;
820 if (ak != NULL) {
821 // Note: create_basic_type_mirror above initializes ak to a non-null value.
822 type = ArrayKlass::cast(ak)->element_type();
823 } else {
824 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
825 }
826 assert(Universe::java_mirror(type) == java_class, "must be consistent");
827 return type;
828 }
830 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
831 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
832 if (is_primitive(java_class)) {
833 if (reference_klass != NULL)
834 (*reference_klass) = NULL;
835 return primitive_type(java_class);
836 } else {
837 if (reference_klass != NULL)
838 (*reference_klass) = as_Klass(java_class);
839 return T_OBJECT;
840 }
841 }
844 oop java_lang_Class::primitive_mirror(BasicType t) {
845 oop mirror = Universe::java_mirror(t);
846 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
847 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
848 return mirror;
849 }
851 bool java_lang_Class::offsets_computed = false;
852 int java_lang_Class::classRedefinedCount_offset = -1;
854 void java_lang_Class::compute_offsets() {
855 assert(!offsets_computed, "offsets should be initialized only once");
856 offsets_computed = true;
858 Klass* klass_oop = SystemDictionary::Class_klass();
859 // The classRedefinedCount field is only present starting in 1.5,
860 // so don't go fatal.
861 compute_optional_offset(classRedefinedCount_offset,
862 klass_oop, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
864 // Needs to be optional because the old build runs Queens during bootstrapping
865 // and jdk8-9 doesn't have coordinated pushes yet.
866 compute_optional_offset(_class_loader_offset,
867 klass_oop, vmSymbols::classLoader_name(),
868 vmSymbols::classloader_signature());
870 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
871 }
873 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
874 if (!JDK_Version::is_gte_jdk15x_version()
875 || classRedefinedCount_offset == -1) {
876 // The classRedefinedCount field is only present starting in 1.5.
877 // If we don't have an offset for it then just return -1 as a marker.
878 return -1;
879 }
881 return the_class_mirror->int_field(classRedefinedCount_offset);
882 }
884 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
885 if (!JDK_Version::is_gte_jdk15x_version()
886 || classRedefinedCount_offset == -1) {
887 // The classRedefinedCount field is only present starting in 1.5.
888 // If we don't have an offset for it then nothing to set.
889 return;
890 }
892 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
893 }
896 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
897 // platform thread structure, and a eetop offset which was used for thread
898 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
899 // merged, so in the HotSpot VM we just use the eetop field for the thread
900 // instead of the privateInfo_offset.
901 //
902 // Note: The stackSize field is only present starting in 1.4.
904 int java_lang_Thread::_name_offset = 0;
905 int java_lang_Thread::_group_offset = 0;
906 int java_lang_Thread::_contextClassLoader_offset = 0;
907 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
908 int java_lang_Thread::_priority_offset = 0;
909 int java_lang_Thread::_eetop_offset = 0;
910 int java_lang_Thread::_daemon_offset = 0;
911 int java_lang_Thread::_stillborn_offset = 0;
912 int java_lang_Thread::_stackSize_offset = 0;
913 int java_lang_Thread::_tid_offset = 0;
914 int java_lang_Thread::_thread_status_offset = 0;
915 int java_lang_Thread::_park_blocker_offset = 0;
916 int java_lang_Thread::_park_event_offset = 0 ;
919 void java_lang_Thread::compute_offsets() {
920 assert(_group_offset == 0, "offsets should be initialized only once");
922 Klass* k = SystemDictionary::Thread_klass();
923 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature());
924 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
925 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
926 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
927 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
928 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
929 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
930 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
931 // The stackSize field is only present starting in 1.4, so don't go fatal.
932 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
933 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
934 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
935 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
936 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
937 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
938 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
939 vmSymbols::long_signature());
940 }
943 JavaThread* java_lang_Thread::thread(oop java_thread) {
944 return (JavaThread*)java_thread->address_field(_eetop_offset);
945 }
948 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
949 java_thread->address_field_put(_eetop_offset, (address)thread);
950 }
953 typeArrayOop java_lang_Thread::name(oop java_thread) {
954 oop name = java_thread->obj_field(_name_offset);
955 assert(name == NULL || (name->is_typeArray() && TypeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking");
956 return typeArrayOop(name);
957 }
960 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) {
961 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL");
962 java_thread->obj_field_put(_name_offset, name);
963 }
966 ThreadPriority java_lang_Thread::priority(oop java_thread) {
967 return (ThreadPriority)java_thread->int_field(_priority_offset);
968 }
971 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
972 java_thread->int_field_put(_priority_offset, priority);
973 }
976 oop java_lang_Thread::threadGroup(oop java_thread) {
977 return java_thread->obj_field(_group_offset);
978 }
981 bool java_lang_Thread::is_stillborn(oop java_thread) {
982 return java_thread->bool_field(_stillborn_offset) != 0;
983 }
986 // We never have reason to turn the stillborn bit off
987 void java_lang_Thread::set_stillborn(oop java_thread) {
988 java_thread->bool_field_put(_stillborn_offset, true);
989 }
992 bool java_lang_Thread::is_alive(oop java_thread) {
993 JavaThread* thr = java_lang_Thread::thread(java_thread);
994 return (thr != NULL);
995 }
998 bool java_lang_Thread::is_daemon(oop java_thread) {
999 return java_thread->bool_field(_daemon_offset) != 0;
1000 }
1003 void java_lang_Thread::set_daemon(oop java_thread) {
1004 java_thread->bool_field_put(_daemon_offset, true);
1005 }
1007 oop java_lang_Thread::context_class_loader(oop java_thread) {
1008 return java_thread->obj_field(_contextClassLoader_offset);
1009 }
1011 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1012 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1013 }
1016 jlong java_lang_Thread::stackSize(oop java_thread) {
1017 // The stackSize field is only present starting in 1.4
1018 if (_stackSize_offset > 0) {
1019 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check");
1020 return java_thread->long_field(_stackSize_offset);
1021 } else {
1022 return 0;
1023 }
1024 }
1026 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1027 void java_lang_Thread::set_thread_status(oop java_thread,
1028 java_lang_Thread::ThreadStatus status) {
1029 // The threadStatus is only present starting in 1.5
1030 if (_thread_status_offset > 0) {
1031 java_thread->int_field_put(_thread_status_offset, status);
1032 }
1033 }
1035 // Read thread status value from threadStatus field in java.lang.Thread java class.
1036 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1037 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() ||
1038 JavaThread::current()->thread_state() == _thread_in_vm,
1039 "Java Thread is not running in vm");
1040 // The threadStatus is only present starting in 1.5
1041 if (_thread_status_offset > 0) {
1042 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1043 } else {
1044 // All we can easily figure out is if it is alive, but that is
1045 // enough info for a valid unknown status.
1046 // These aren't restricted to valid set ThreadStatus values, so
1047 // use JVMTI values and cast.
1048 JavaThread* thr = java_lang_Thread::thread(java_thread);
1049 if (thr == NULL) {
1050 // the thread hasn't run yet or is in the process of exiting
1051 return NEW;
1052 }
1053 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1054 }
1055 }
1058 jlong java_lang_Thread::thread_id(oop java_thread) {
1059 // The thread ID field is only present starting in 1.5
1060 if (_tid_offset > 0) {
1061 return java_thread->long_field(_tid_offset);
1062 } else {
1063 return 0;
1064 }
1065 }
1067 oop java_lang_Thread::park_blocker(oop java_thread) {
1068 assert(JDK_Version::current().supports_thread_park_blocker() &&
1069 _park_blocker_offset != 0, "Must support parkBlocker field");
1071 if (_park_blocker_offset > 0) {
1072 return java_thread->obj_field(_park_blocker_offset);
1073 }
1075 return NULL;
1076 }
1078 jlong java_lang_Thread::park_event(oop java_thread) {
1079 if (_park_event_offset > 0) {
1080 return java_thread->long_field(_park_event_offset);
1081 }
1082 return 0;
1083 }
1085 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1086 if (_park_event_offset > 0) {
1087 java_thread->long_field_put(_park_event_offset, ptr);
1088 return true;
1089 }
1090 return false;
1091 }
1094 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1095 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status");
1096 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1097 switch (status) {
1098 case NEW : return "NEW";
1099 case RUNNABLE : return "RUNNABLE";
1100 case SLEEPING : return "TIMED_WAITING (sleeping)";
1101 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1102 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1103 case PARKED : return "WAITING (parking)";
1104 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1105 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1106 case TERMINATED : return "TERMINATED";
1107 default : return "UNKNOWN";
1108 };
1109 }
1110 int java_lang_ThreadGroup::_parent_offset = 0;
1111 int java_lang_ThreadGroup::_name_offset = 0;
1112 int java_lang_ThreadGroup::_threads_offset = 0;
1113 int java_lang_ThreadGroup::_groups_offset = 0;
1114 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1115 int java_lang_ThreadGroup::_destroyed_offset = 0;
1116 int java_lang_ThreadGroup::_daemon_offset = 0;
1117 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
1118 int java_lang_ThreadGroup::_nthreads_offset = 0;
1119 int java_lang_ThreadGroup::_ngroups_offset = 0;
1121 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1122 assert(java_thread_group->is_oop(), "thread group must be oop");
1123 return java_thread_group->obj_field(_parent_offset);
1124 }
1126 // ("name as oop" accessor is not necessary)
1128 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
1129 oop name = java_thread_group->obj_field(_name_offset);
1130 // ThreadGroup.name can be null
1131 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
1132 }
1134 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1135 assert(java_thread_group->is_oop(), "thread group must be oop");
1136 return java_thread_group->int_field(_nthreads_offset);
1137 }
1139 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1140 oop threads = java_thread_group->obj_field(_threads_offset);
1141 assert(threads != NULL, "threadgroups should have threads");
1142 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1143 return objArrayOop(threads);
1144 }
1146 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1147 assert(java_thread_group->is_oop(), "thread group must be oop");
1148 return java_thread_group->int_field(_ngroups_offset);
1149 }
1151 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1152 oop groups = java_thread_group->obj_field(_groups_offset);
1153 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1154 return objArrayOop(groups);
1155 }
1157 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1158 assert(java_thread_group->is_oop(), "thread group must be oop");
1159 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1160 }
1162 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1163 assert(java_thread_group->is_oop(), "thread group must be oop");
1164 return java_thread_group->bool_field(_destroyed_offset) != 0;
1165 }
1167 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1168 assert(java_thread_group->is_oop(), "thread group must be oop");
1169 return java_thread_group->bool_field(_daemon_offset) != 0;
1170 }
1172 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1173 assert(java_thread_group->is_oop(), "thread group must be oop");
1174 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1175 }
1177 void java_lang_ThreadGroup::compute_offsets() {
1178 assert(_parent_offset == 0, "offsets should be initialized only once");
1180 Klass* k = SystemDictionary::ThreadGroup_klass();
1182 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1183 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1184 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1185 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1186 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1187 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1188 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1189 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1190 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1191 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1192 }
1194 oop java_lang_Throwable::unassigned_stacktrace() {
1195 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass());
1196 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1197 if (UseCompressedOops) {
1198 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1199 } else {
1200 return oopDesc::load_decode_heap_oop((oop*)addr);
1201 }
1202 }
1204 oop java_lang_Throwable::backtrace(oop throwable) {
1205 return throwable->obj_field_acquire(backtrace_offset);
1206 }
1209 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1210 throwable->release_obj_field_put(backtrace_offset, value);
1211 }
1214 oop java_lang_Throwable::message(oop throwable) {
1215 return throwable->obj_field(detailMessage_offset);
1216 }
1219 oop java_lang_Throwable::message(Handle throwable) {
1220 return throwable->obj_field(detailMessage_offset);
1221 }
1224 void java_lang_Throwable::set_message(oop throwable, oop value) {
1225 throwable->obj_field_put(detailMessage_offset, value);
1226 }
1229 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1230 throwable->obj_field_put(stackTrace_offset, st_element_array);
1231 }
1233 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1234 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1235 set_stacktrace(throwable, NULL);
1236 }
1239 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1240 ResourceMark rm;
1241 Klass* k = throwable->klass();
1242 assert(k != NULL, "just checking");
1243 st->print("%s", InstanceKlass::cast(k)->external_name());
1244 oop msg = message(throwable);
1245 if (msg != NULL) {
1246 st->print(": %s", java_lang_String::as_utf8_string(msg));
1247 }
1248 }
1251 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1252 ResourceMark rm;
1253 Klass* k = throwable->klass();
1254 assert(k != NULL, "just checking");
1255 st->print("%s", InstanceKlass::cast(k)->external_name());
1256 oop msg = message(throwable);
1257 if (msg != NULL) {
1258 st->print(": %s", java_lang_String::as_utf8_string(msg));
1259 }
1260 }
1262 // After this many redefines, the stack trace is unreliable.
1263 const int MAX_VERSION = USHRT_MAX;
1265 // Helper backtrace functions to store bci|version together.
1266 static inline int merge_bci_and_version(int bci, int version) {
1267 // only store u2 for version, checking for overflow.
1268 if (version > USHRT_MAX || version < 0) version = MAX_VERSION;
1269 assert((jushort)bci == bci, "bci should be short");
1270 return build_int_from_shorts(version, bci);
1271 }
1273 static inline int bci_at(unsigned int merged) {
1274 return extract_high_short_from_int(merged);
1275 }
1276 static inline int version_at(unsigned int merged) {
1277 return extract_low_short_from_int(merged);
1278 }
1280 static inline bool version_matches(Method* method, int version) {
1281 assert(version < MAX_VERSION, "version is too big");
1282 return method != NULL && (method->constants()->version() == version);
1283 }
1285 static inline int get_line_number(Method* method, int bci) {
1286 int line_number = 0;
1287 if (method->is_native()) {
1288 // Negative value different from -1 below, enabling Java code in
1289 // class java.lang.StackTraceElement to distinguish "native" from
1290 // "no LineNumberTable". JDK tests for -2.
1291 line_number = -2;
1292 } else {
1293 // Returns -1 if no LineNumberTable, and otherwise actual line number
1294 line_number = method->line_number_from_bci(bci);
1295 if (line_number == -1 && ShowHiddenFrames) {
1296 line_number = bci + 1000000;
1297 }
1298 }
1299 return line_number;
1300 }
1302 // This class provides a simple wrapper over the internal structure of
1303 // exception backtrace to insulate users of the backtrace from needing
1304 // to know what it looks like.
1305 class BacktraceBuilder: public StackObj {
1306 private:
1307 Handle _backtrace;
1308 objArrayOop _head;
1309 typeArrayOop _methods;
1310 typeArrayOop _bcis;
1311 objArrayOop _mirrors;
1312 typeArrayOop _cprefs; // needed to insulate method name against redefinition
1313 int _index;
1314 No_Safepoint_Verifier _nsv;
1316 public:
1318 enum {
1319 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1320 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1321 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1322 trace_cprefs_offset = java_lang_Throwable::trace_cprefs_offset,
1323 trace_next_offset = java_lang_Throwable::trace_next_offset,
1324 trace_size = java_lang_Throwable::trace_size,
1325 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1326 };
1328 // get info out of chunks
1329 static typeArrayOop get_methods(objArrayHandle chunk) {
1330 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1331 assert(methods != NULL, "method array should be initialized in backtrace");
1332 return methods;
1333 }
1334 static typeArrayOop get_bcis(objArrayHandle chunk) {
1335 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1336 assert(bcis != NULL, "bci array should be initialized in backtrace");
1337 return bcis;
1338 }
1339 static objArrayOop get_mirrors(objArrayHandle chunk) {
1340 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1341 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1342 return mirrors;
1343 }
1344 static typeArrayOop get_cprefs(objArrayHandle chunk) {
1345 typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset));
1346 assert(cprefs != NULL, "cprefs array should be initialized in backtrace");
1347 return cprefs;
1348 }
1350 // constructor for new backtrace
1351 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) {
1352 expand(CHECK);
1353 _backtrace = _head;
1354 _index = 0;
1355 }
1357 BacktraceBuilder(objArrayHandle backtrace) {
1358 _methods = get_methods(backtrace);
1359 _bcis = get_bcis(backtrace);
1360 _mirrors = get_mirrors(backtrace);
1361 _cprefs = get_cprefs(backtrace);
1362 assert(_methods->length() == _bcis->length() &&
1363 _methods->length() == _mirrors->length(),
1364 "method and source information arrays should match");
1366 // head is the preallocated backtrace
1367 _backtrace = _head = backtrace();
1368 _index = 0;
1369 }
1371 void expand(TRAPS) {
1372 objArrayHandle old_head(THREAD, _head);
1373 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1375 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1376 objArrayHandle new_head(THREAD, head);
1378 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1379 typeArrayHandle new_methods(THREAD, methods);
1381 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1382 typeArrayHandle new_bcis(THREAD, bcis);
1384 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1385 objArrayHandle new_mirrors(THREAD, mirrors);
1387 typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1388 typeArrayHandle new_cprefs(THREAD, cprefs);
1390 if (!old_head.is_null()) {
1391 old_head->obj_at_put(trace_next_offset, new_head());
1392 }
1393 new_head->obj_at_put(trace_methods_offset, new_methods());
1394 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1395 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1396 new_head->obj_at_put(trace_cprefs_offset, new_cprefs());
1398 _head = new_head();
1399 _methods = new_methods();
1400 _bcis = new_bcis();
1401 _mirrors = new_mirrors();
1402 _cprefs = new_cprefs();
1403 _index = 0;
1404 }
1406 oop backtrace() {
1407 return _backtrace();
1408 }
1410 inline void push(Method* method, int bci, TRAPS) {
1411 // Smear the -1 bci to 0 since the array only holds unsigned
1412 // shorts. The later line number lookup would just smear the -1
1413 // to a 0 even if it could be recorded.
1414 if (bci == SynchronizationEntryBCI) bci = 0;
1416 if (_index >= trace_chunk_size) {
1417 methodHandle mhandle(THREAD, method);
1418 expand(CHECK);
1419 method = mhandle();
1420 }
1422 _methods->short_at_put(_index, method->orig_method_idnum());
1423 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version()));
1424 _cprefs->short_at_put(_index, method->name_index());
1426 // We need to save the mirrors in the backtrace to keep the class
1427 // from being unloaded while we still have this stack trace.
1428 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1429 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1430 _index++;
1431 }
1433 };
1435 // Print stack trace element to resource allocated buffer
1436 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
1437 int method_id, int version, int bci, int cpref) {
1439 // Get strings and string lengths
1440 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1441 const char* klass_name = holder->external_name();
1442 int buf_len = (int)strlen(klass_name);
1444 Method* method = holder->method_with_orig_idnum(method_id, version);
1446 // The method can be NULL if the requested class version is gone
1447 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1448 char* method_name = sym->as_C_string();
1449 buf_len += (int)strlen(method_name);
1451 // Use a specific ik version as a holder since the mirror might
1452 // refer to a version that is now obsolete and no longer accessible
1453 // via the previous versions list.
1454 holder = holder->get_klass_version(version);
1455 char* source_file_name = NULL;
1456 if (holder != NULL) {
1457 Symbol* source = holder->source_file_name();
1458 if (source != NULL) {
1459 source_file_name = source->as_C_string();
1460 buf_len += (int)strlen(source_file_name);
1461 }
1462 }
1464 // Allocate temporary buffer with extra space for formatting and line number
1465 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1467 // Print stack trace line in buffer
1468 sprintf(buf, "\tat %s.%s", klass_name, method_name);
1470 if (!version_matches(method, version)) {
1471 strcat(buf, "(Redefined)");
1472 } else {
1473 int line_number = get_line_number(method, bci);
1474 if (line_number == -2) {
1475 strcat(buf, "(Native Method)");
1476 } else {
1477 if (source_file_name != NULL && (line_number != -1)) {
1478 // Sourcename and linenumber
1479 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1480 } else if (source_file_name != NULL) {
1481 // Just sourcename
1482 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1483 } else {
1484 // Neither sourcename nor linenumber
1485 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1486 }
1487 nmethod* nm = method->code();
1488 if (WizardMode && nm != NULL) {
1489 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1490 }
1491 }
1492 }
1494 return buf;
1495 }
1497 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror,
1498 int method_id, int version, int bci, int cpref) {
1499 ResourceMark rm;
1500 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci, cpref);
1501 st->print_cr("%s", buf);
1502 }
1504 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) {
1505 Handle mirror = method->method_holder()->java_mirror();
1506 int method_id = method->orig_method_idnum();
1507 int version = method->constants()->version();
1508 int cpref = method->name_index();
1509 print_stack_element(st, mirror, method_id, version, bci, cpref);
1510 }
1512 const char* java_lang_Throwable::no_stack_trace_message() {
1513 return "\t<<no stack trace available>>";
1514 }
1517 // Currently used only for exceptions occurring during startup
1518 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1519 Thread *THREAD = Thread::current();
1520 Handle h_throwable(THREAD, throwable);
1521 while (h_throwable.not_null()) {
1522 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1523 if (result.is_null()) {
1524 st->print_cr("%s", no_stack_trace_message());
1525 return;
1526 }
1528 while (result.not_null()) {
1530 // Get method id, bci, version and mirror from chunk
1531 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result));
1532 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result));
1533 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result));
1534 typeArrayHandle cprefs (THREAD, BacktraceBuilder::get_cprefs(result));
1536 int length = methods()->length();
1537 for (int index = 0; index < length; index++) {
1538 Handle mirror(THREAD, mirrors->obj_at(index));
1539 // NULL mirror means end of stack trace
1540 if (mirror.is_null()) goto handle_cause;
1541 int method = methods->short_at(index);
1542 int version = version_at(bcis->int_at(index));
1543 int bci = bci_at(bcis->int_at(index));
1544 int cpref = cprefs->short_at(index);
1545 print_stack_element(st, mirror, method, version, bci, cpref);
1546 }
1547 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1548 }
1549 handle_cause:
1550 {
1551 EXCEPTION_MARK;
1552 JavaValue cause(T_OBJECT);
1553 JavaCalls::call_virtual(&cause,
1554 h_throwable,
1555 KlassHandle(THREAD, h_throwable->klass()),
1556 vmSymbols::getCause_name(),
1557 vmSymbols::void_throwable_signature(),
1558 THREAD);
1559 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1560 if (HAS_PENDING_EXCEPTION) {
1561 CLEAR_PENDING_EXCEPTION;
1562 h_throwable = Handle();
1563 } else {
1564 h_throwable = Handle(THREAD, (oop) cause.get_jobject());
1565 if (h_throwable.not_null()) {
1566 st->print("Caused by: ");
1567 print(h_throwable, st);
1568 st->cr();
1569 }
1570 }
1571 }
1572 }
1573 }
1575 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) {
1576 if (!StackTraceInThrowable) return;
1577 ResourceMark rm(THREAD);
1579 // Start out by clearing the backtrace for this object, in case the VM
1580 // runs out of memory while allocating the stack trace
1581 set_backtrace(throwable(), NULL);
1582 if (JDK_Version::is_gte_jdk14x_version()) {
1583 // New since 1.4, clear lazily constructed Java level stacktrace if
1584 // refilling occurs
1585 // This is unnecessary in 1.7+ but harmless
1586 clear_stacktrace(throwable());
1587 }
1589 int max_depth = MaxJavaStackTraceDepth;
1590 JavaThread* thread = (JavaThread*)THREAD;
1591 BacktraceBuilder bt(CHECK);
1593 // If there is no Java frame just return the method that was being called
1594 // with bci 0
1595 if (!thread->has_last_Java_frame()) {
1596 if (max_depth >= 1 && method() != NULL) {
1597 bt.push(method(), 0, CHECK);
1598 set_backtrace(throwable(), bt.backtrace());
1599 }
1600 return;
1601 }
1603 // Instead of using vframe directly, this version of fill_in_stack_trace
1604 // basically handles everything by hand. This significantly improved the
1605 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1606 // See bug 6333838 for more details.
1607 // The "ASSERT" here is to verify this method generates the exactly same stack
1608 // trace as utilizing vframe.
1609 #ifdef ASSERT
1610 vframeStream st(thread);
1611 methodHandle st_method(THREAD, st.method());
1612 #endif
1613 int total_count = 0;
1614 RegisterMap map(thread, false);
1615 int decode_offset = 0;
1616 nmethod* nm = NULL;
1617 bool skip_fillInStackTrace_check = false;
1618 bool skip_throwableInit_check = false;
1619 bool skip_hidden = !ShowHiddenFrames;
1621 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1622 Method* method = NULL;
1623 int bci = 0;
1625 // Compiled java method case.
1626 if (decode_offset != 0) {
1627 DebugInfoReadStream stream(nm, decode_offset);
1628 decode_offset = stream.read_int();
1629 method = (Method*)nm->metadata_at(stream.read_int());
1630 bci = stream.read_bci();
1631 } else {
1632 if (fr.is_first_frame()) break;
1633 address pc = fr.pc();
1634 if (fr.is_interpreted_frame()) {
1635 intptr_t bcx = fr.interpreter_frame_bcx();
1636 method = fr.interpreter_frame_method();
1637 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
1638 fr = fr.sender(&map);
1639 } else {
1640 CodeBlob* cb = fr.cb();
1641 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1642 // but non nmethod
1643 fr = fr.sender(&map);
1644 if (cb == NULL || !cb->is_nmethod()) {
1645 continue;
1646 }
1647 nm = (nmethod*)cb;
1648 if (nm->method()->is_native()) {
1649 method = nm->method();
1650 bci = 0;
1651 } else {
1652 PcDesc* pd = nm->pc_desc_at(pc);
1653 decode_offset = pd->scope_decode_offset();
1654 // if decode_offset is not equal to 0, it will execute the
1655 // "compiled java method case" at the beginning of the loop.
1656 continue;
1657 }
1658 }
1659 }
1660 #ifdef ASSERT
1661 assert(st_method() == method && st.bci() == bci,
1662 "Wrong stack trace");
1663 st.next();
1664 // vframeStream::method isn't GC-safe so store off a copy
1665 // of the Method* in case we GC.
1666 if (!st.at_end()) {
1667 st_method = st.method();
1668 }
1669 #endif
1671 // the format of the stacktrace will be:
1672 // - 1 or more fillInStackTrace frames for the exception class (skipped)
1673 // - 0 or more <init> methods for the exception class (skipped)
1674 // - rest of the stack
1676 if (!skip_fillInStackTrace_check) {
1677 if ((method->name() == vmSymbols::fillInStackTrace_name() ||
1678 method->name() == vmSymbols::fillInStackTrace0_name()) &&
1679 throwable->is_a(method->method_holder())) {
1680 continue;
1681 }
1682 else {
1683 skip_fillInStackTrace_check = true; // gone past them all
1684 }
1685 }
1686 if (!skip_throwableInit_check) {
1687 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1689 // skip <init> methods of the exception class and superclasses
1690 // This is simlar to classic VM.
1691 if (method->name() == vmSymbols::object_initializer_name() &&
1692 throwable->is_a(method->method_holder())) {
1693 continue;
1694 } else {
1695 // there are none or we've seen them all - either way stop checking
1696 skip_throwableInit_check = true;
1697 }
1698 }
1699 if (method->is_hidden()) {
1700 if (skip_hidden) continue;
1701 }
1702 bt.push(method, bci, CHECK);
1703 total_count++;
1704 }
1706 // Put completed stack trace into throwable object
1707 set_backtrace(throwable(), bt.backtrace());
1708 }
1710 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) {
1711 // No-op if stack trace is disabled
1712 if (!StackTraceInThrowable) {
1713 return;
1714 }
1716 // Disable stack traces for some preallocated out of memory errors
1717 if (!Universe::should_fill_in_stack_trace(throwable)) {
1718 return;
1719 }
1721 PRESERVE_EXCEPTION_MARK;
1723 JavaThread* thread = JavaThread::active();
1724 fill_in_stack_trace(throwable, method, thread);
1725 // ignore exceptions thrown during stack trace filling
1726 CLEAR_PENDING_EXCEPTION;
1727 }
1729 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1730 // Allocate stack trace - backtrace is created but not filled in
1732 // No-op if stack trace is disabled
1733 if (!StackTraceInThrowable) return;
1734 BacktraceBuilder bt(CHECK); // creates a backtrace
1735 set_backtrace(throwable(), bt.backtrace());
1736 }
1739 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1740 // Fill in stack trace into preallocated backtrace (no GC)
1742 // No-op if stack trace is disabled
1743 if (!StackTraceInThrowable) return;
1745 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1747 JavaThread* THREAD = JavaThread::current();
1749 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
1750 assert(backtrace.not_null(), "backtrace should have been preallocated");
1752 ResourceMark rm(THREAD);
1753 vframeStream st(THREAD);
1755 BacktraceBuilder bt(backtrace);
1757 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1758 // methods as preallocated errors aren't created by "java" code.
1760 // fill in as much stack trace as possible
1761 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace);
1762 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1763 int chunk_count = 0;
1765 for (;!st.at_end(); st.next()) {
1766 bt.push(st.method(), st.bci(), CHECK);
1767 chunk_count++;
1769 // Bail-out for deep stacks
1770 if (chunk_count >= max_chunks) break;
1771 }
1773 // For Java 7+ we support the Throwable immutability protocol defined for Java 7. This support
1774 // was missing in 7u0 so in 7u0 there is a workaround in the Throwable class. That workaround
1775 // can be removed in a JDK using this JVM version
1776 if (JDK_Version::is_gte_jdk17x_version()) {
1777 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
1778 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
1779 }
1780 }
1783 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1784 if (throwable == NULL) {
1785 THROW_0(vmSymbols::java_lang_NullPointerException());
1786 }
1787 objArrayOop chunk = objArrayOop(backtrace(throwable));
1788 int depth = 0;
1789 if (chunk != NULL) {
1790 // Iterate over chunks and count full ones
1791 while (true) {
1792 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1793 if (next == NULL) break;
1794 depth += trace_chunk_size;
1795 chunk = next;
1796 }
1797 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1798 // Count element in remaining partial chunk. NULL value for mirror
1799 // marks the end of the stack trace elements that are saved.
1800 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1801 assert(mirrors != NULL, "sanity check");
1802 for (int i = 0; i < mirrors->length(); i++) {
1803 if (mirrors->obj_at(i) == NULL) break;
1804 depth++;
1805 }
1806 }
1807 return depth;
1808 }
1811 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1812 if (throwable == NULL) {
1813 THROW_0(vmSymbols::java_lang_NullPointerException());
1814 }
1815 if (index < 0) {
1816 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1817 }
1818 // Compute how many chunks to skip and index into actual chunk
1819 objArrayOop chunk = objArrayOop(backtrace(throwable));
1820 int skip_chunks = index / trace_chunk_size;
1821 int chunk_index = index % trace_chunk_size;
1822 while (chunk != NULL && skip_chunks > 0) {
1823 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1824 skip_chunks--;
1825 }
1826 if (chunk == NULL) {
1827 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1828 }
1829 // Get method id, bci, version, mirror and cpref from chunk
1830 typeArrayOop methods = BacktraceBuilder::get_methods(chunk);
1831 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk);
1832 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1833 typeArrayOop cprefs = BacktraceBuilder::get_cprefs(chunk);
1835 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check");
1837 int method = methods->short_at(chunk_index);
1838 int version = version_at(bcis->int_at(chunk_index));
1839 int bci = bci_at(bcis->int_at(chunk_index));
1840 int cpref = cprefs->short_at(chunk_index);
1841 Handle mirror(THREAD, mirrors->obj_at(chunk_index));
1843 // Chunk can be partial full
1844 if (mirror.is_null()) {
1845 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1846 }
1847 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, cpref, CHECK_0);
1848 return element;
1849 }
1851 oop java_lang_StackTraceElement::create(Handle mirror, int method_id,
1852 int version, int bci, int cpref, TRAPS) {
1853 // Allocate java.lang.StackTraceElement instance
1854 Klass* k = SystemDictionary::StackTraceElement_klass();
1855 assert(k != NULL, "must be loaded in 1.4+");
1856 instanceKlassHandle ik (THREAD, k);
1857 if (ik->should_be_initialized()) {
1858 ik->initialize(CHECK_0);
1859 }
1861 Handle element = ik->allocate_instance_handle(CHECK_0);
1862 // Fill in class name
1863 ResourceMark rm(THREAD);
1864 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1865 const char* str = holder->external_name();
1866 oop classname = StringTable::intern((char*) str, CHECK_0);
1867 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1869 Method* method = holder->method_with_orig_idnum(method_id, version);
1871 // The method can be NULL if the requested class version is gone
1872 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1874 // Fill in method name
1875 oop methodname = StringTable::intern(sym, CHECK_0);
1876 java_lang_StackTraceElement::set_methodName(element(), methodname);
1878 if (!version_matches(method, version)) {
1879 // The method was redefined, accurate line number information isn't available
1880 java_lang_StackTraceElement::set_fileName(element(), NULL);
1881 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1882 } else {
1883 // Fill in source file name and line number.
1884 // Use a specific ik version as a holder since the mirror might
1885 // refer to a version that is now obsolete and no longer accessible
1886 // via the previous versions list.
1887 holder = holder->get_klass_version(version);
1888 assert(holder != NULL, "sanity check");
1889 Symbol* source = holder->source_file_name();
1890 if (ShowHiddenFrames && source == NULL)
1891 source = vmSymbols::unknown_class_name();
1892 oop filename = StringTable::intern(source, CHECK_0);
1893 java_lang_StackTraceElement::set_fileName(element(), filename);
1895 int line_number = get_line_number(method, bci);
1896 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1897 }
1898 return element();
1899 }
1901 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1902 Handle mirror (THREAD, method->method_holder()->java_mirror());
1903 int method_id = method->orig_method_idnum();
1904 int cpref = method->name_index();
1905 return create(mirror, method_id, method->constants()->version(), bci, cpref, THREAD);
1906 }
1908 void java_lang_reflect_AccessibleObject::compute_offsets() {
1909 Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
1910 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1911 }
1913 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1914 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1915 return (jboolean) reflect->bool_field(override_offset);
1916 }
1918 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1919 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1920 reflect->bool_field_put(override_offset, (int) value);
1921 }
1923 void java_lang_reflect_Method::compute_offsets() {
1924 Klass* k = SystemDictionary::reflect_Method_klass();
1925 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1926 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1927 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1928 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1929 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1930 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1931 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1932 // The generic signature and annotations fields are only present in 1.5
1933 signature_offset = -1;
1934 annotations_offset = -1;
1935 parameter_annotations_offset = -1;
1936 annotation_default_offset = -1;
1937 type_annotations_offset = -1;
1938 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1939 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1940 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1941 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1942 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
1943 }
1945 Handle java_lang_reflect_Method::create(TRAPS) {
1946 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1947 Klass* klass = SystemDictionary::reflect_Method_klass();
1948 // This class is eagerly initialized during VM initialization, since we keep a refence
1949 // to one of the methods
1950 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
1951 return InstanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH);
1952 }
1954 oop java_lang_reflect_Method::clazz(oop reflect) {
1955 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1956 return reflect->obj_field(clazz_offset);
1957 }
1959 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1960 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1961 reflect->obj_field_put(clazz_offset, value);
1962 }
1964 int java_lang_reflect_Method::slot(oop reflect) {
1965 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1966 return reflect->int_field(slot_offset);
1967 }
1969 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1970 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1971 reflect->int_field_put(slot_offset, value);
1972 }
1974 oop java_lang_reflect_Method::name(oop method) {
1975 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1976 return method->obj_field(name_offset);
1977 }
1979 void java_lang_reflect_Method::set_name(oop method, oop value) {
1980 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1981 method->obj_field_put(name_offset, value);
1982 }
1984 oop java_lang_reflect_Method::return_type(oop method) {
1985 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1986 return method->obj_field(returnType_offset);
1987 }
1989 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
1990 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1991 method->obj_field_put(returnType_offset, value);
1992 }
1994 oop java_lang_reflect_Method::parameter_types(oop method) {
1995 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1996 return method->obj_field(parameterTypes_offset);
1997 }
1999 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2000 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2001 method->obj_field_put(parameterTypes_offset, value);
2002 }
2004 oop java_lang_reflect_Method::exception_types(oop method) {
2005 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2006 return method->obj_field(exceptionTypes_offset);
2007 }
2009 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2010 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2011 method->obj_field_put(exceptionTypes_offset, value);
2012 }
2014 int java_lang_reflect_Method::modifiers(oop method) {
2015 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2016 return method->int_field(modifiers_offset);
2017 }
2019 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2020 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2021 method->int_field_put(modifiers_offset, value);
2022 }
2024 bool java_lang_reflect_Method::has_signature_field() {
2025 return (signature_offset >= 0);
2026 }
2028 oop java_lang_reflect_Method::signature(oop method) {
2029 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2030 assert(has_signature_field(), "signature field must be present");
2031 return method->obj_field(signature_offset);
2032 }
2034 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2035 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2036 assert(has_signature_field(), "signature field must be present");
2037 method->obj_field_put(signature_offset, value);
2038 }
2040 bool java_lang_reflect_Method::has_annotations_field() {
2041 return (annotations_offset >= 0);
2042 }
2044 oop java_lang_reflect_Method::annotations(oop method) {
2045 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2046 assert(has_annotations_field(), "annotations field must be present");
2047 return method->obj_field(annotations_offset);
2048 }
2050 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2051 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2052 assert(has_annotations_field(), "annotations field must be present");
2053 method->obj_field_put(annotations_offset, value);
2054 }
2056 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2057 return (parameter_annotations_offset >= 0);
2058 }
2060 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2061 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2062 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2063 return method->obj_field(parameter_annotations_offset);
2064 }
2066 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2067 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2068 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2069 method->obj_field_put(parameter_annotations_offset, value);
2070 }
2072 bool java_lang_reflect_Method::has_annotation_default_field() {
2073 return (annotation_default_offset >= 0);
2074 }
2076 oop java_lang_reflect_Method::annotation_default(oop method) {
2077 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2078 assert(has_annotation_default_field(), "annotation default field must be present");
2079 return method->obj_field(annotation_default_offset);
2080 }
2082 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2083 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2084 assert(has_annotation_default_field(), "annotation default field must be present");
2085 method->obj_field_put(annotation_default_offset, value);
2086 }
2088 bool java_lang_reflect_Method::has_type_annotations_field() {
2089 return (type_annotations_offset >= 0);
2090 }
2092 oop java_lang_reflect_Method::type_annotations(oop method) {
2093 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2094 assert(has_type_annotations_field(), "type_annotations field must be present");
2095 return method->obj_field(type_annotations_offset);
2096 }
2098 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2099 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2100 assert(has_type_annotations_field(), "type_annotations field must be present");
2101 method->obj_field_put(type_annotations_offset, value);
2102 }
2104 void java_lang_reflect_Constructor::compute_offsets() {
2105 Klass* k = SystemDictionary::reflect_Constructor_klass();
2106 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2107 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2108 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2109 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2110 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2111 // The generic signature and annotations fields are only present in 1.5
2112 signature_offset = -1;
2113 annotations_offset = -1;
2114 parameter_annotations_offset = -1;
2115 type_annotations_offset = -1;
2116 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2117 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2118 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2119 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2120 }
2122 Handle java_lang_reflect_Constructor::create(TRAPS) {
2123 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2124 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2125 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2126 instanceKlassHandle klass (THREAD, k);
2127 // Ensure it is initialized
2128 klass->initialize(CHECK_NH);
2129 return klass->allocate_instance_handle(CHECK_NH);
2130 }
2132 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2133 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2134 return reflect->obj_field(clazz_offset);
2135 }
2137 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2138 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2139 reflect->obj_field_put(clazz_offset, value);
2140 }
2142 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2143 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2144 return constructor->obj_field(parameterTypes_offset);
2145 }
2147 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2148 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2149 constructor->obj_field_put(parameterTypes_offset, value);
2150 }
2152 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2153 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2154 return constructor->obj_field(exceptionTypes_offset);
2155 }
2157 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2158 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2159 constructor->obj_field_put(exceptionTypes_offset, value);
2160 }
2162 int java_lang_reflect_Constructor::slot(oop reflect) {
2163 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2164 return reflect->int_field(slot_offset);
2165 }
2167 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2168 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2169 reflect->int_field_put(slot_offset, value);
2170 }
2172 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2173 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2174 return constructor->int_field(modifiers_offset);
2175 }
2177 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2178 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2179 constructor->int_field_put(modifiers_offset, value);
2180 }
2182 bool java_lang_reflect_Constructor::has_signature_field() {
2183 return (signature_offset >= 0);
2184 }
2186 oop java_lang_reflect_Constructor::signature(oop constructor) {
2187 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2188 assert(has_signature_field(), "signature field must be present");
2189 return constructor->obj_field(signature_offset);
2190 }
2192 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2193 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2194 assert(has_signature_field(), "signature field must be present");
2195 constructor->obj_field_put(signature_offset, value);
2196 }
2198 bool java_lang_reflect_Constructor::has_annotations_field() {
2199 return (annotations_offset >= 0);
2200 }
2202 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2203 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2204 assert(has_annotations_field(), "annotations field must be present");
2205 return constructor->obj_field(annotations_offset);
2206 }
2208 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2209 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2210 assert(has_annotations_field(), "annotations field must be present");
2211 constructor->obj_field_put(annotations_offset, value);
2212 }
2214 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2215 return (parameter_annotations_offset >= 0);
2216 }
2218 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2219 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2220 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2221 return method->obj_field(parameter_annotations_offset);
2222 }
2224 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2225 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2226 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2227 method->obj_field_put(parameter_annotations_offset, value);
2228 }
2230 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2231 return (type_annotations_offset >= 0);
2232 }
2234 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2235 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2236 assert(has_type_annotations_field(), "type_annotations field must be present");
2237 return constructor->obj_field(type_annotations_offset);
2238 }
2240 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2241 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2242 assert(has_type_annotations_field(), "type_annotations field must be present");
2243 constructor->obj_field_put(type_annotations_offset, value);
2244 }
2246 void java_lang_reflect_Field::compute_offsets() {
2247 Klass* k = SystemDictionary::reflect_Field_klass();
2248 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2249 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2250 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
2251 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2252 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2253 // The generic signature and annotations fields are only present in 1.5
2254 signature_offset = -1;
2255 annotations_offset = -1;
2256 type_annotations_offset = -1;
2257 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2258 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2259 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2260 }
2262 Handle java_lang_reflect_Field::create(TRAPS) {
2263 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2264 Symbol* name = vmSymbols::java_lang_reflect_Field();
2265 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2266 instanceKlassHandle klass (THREAD, k);
2267 // Ensure it is initialized
2268 klass->initialize(CHECK_NH);
2269 return klass->allocate_instance_handle(CHECK_NH);
2270 }
2272 oop java_lang_reflect_Field::clazz(oop reflect) {
2273 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2274 return reflect->obj_field(clazz_offset);
2275 }
2277 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2278 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2279 reflect->obj_field_put(clazz_offset, value);
2280 }
2282 oop java_lang_reflect_Field::name(oop field) {
2283 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2284 return field->obj_field(name_offset);
2285 }
2287 void java_lang_reflect_Field::set_name(oop field, oop value) {
2288 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2289 field->obj_field_put(name_offset, value);
2290 }
2292 oop java_lang_reflect_Field::type(oop field) {
2293 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2294 return field->obj_field(type_offset);
2295 }
2297 void java_lang_reflect_Field::set_type(oop field, oop value) {
2298 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2299 field->obj_field_put(type_offset, value);
2300 }
2302 int java_lang_reflect_Field::slot(oop reflect) {
2303 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2304 return reflect->int_field(slot_offset);
2305 }
2307 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2308 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2309 reflect->int_field_put(slot_offset, value);
2310 }
2312 int java_lang_reflect_Field::modifiers(oop field) {
2313 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2314 return field->int_field(modifiers_offset);
2315 }
2317 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2318 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2319 field->int_field_put(modifiers_offset, value);
2320 }
2322 bool java_lang_reflect_Field::has_signature_field() {
2323 return (signature_offset >= 0);
2324 }
2326 oop java_lang_reflect_Field::signature(oop field) {
2327 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2328 assert(has_signature_field(), "signature field must be present");
2329 return field->obj_field(signature_offset);
2330 }
2332 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2333 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2334 assert(has_signature_field(), "signature field must be present");
2335 field->obj_field_put(signature_offset, value);
2336 }
2338 bool java_lang_reflect_Field::has_annotations_field() {
2339 return (annotations_offset >= 0);
2340 }
2342 oop java_lang_reflect_Field::annotations(oop field) {
2343 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2344 assert(has_annotations_field(), "annotations field must be present");
2345 return field->obj_field(annotations_offset);
2346 }
2348 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2349 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2350 assert(has_annotations_field(), "annotations field must be present");
2351 field->obj_field_put(annotations_offset, value);
2352 }
2354 bool java_lang_reflect_Field::has_type_annotations_field() {
2355 return (type_annotations_offset >= 0);
2356 }
2358 oop java_lang_reflect_Field::type_annotations(oop field) {
2359 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2360 assert(has_type_annotations_field(), "type_annotations field must be present");
2361 return field->obj_field(type_annotations_offset);
2362 }
2364 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2365 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2366 assert(has_type_annotations_field(), "type_annotations field must be present");
2367 field->obj_field_put(type_annotations_offset, value);
2368 }
2370 void sun_reflect_ConstantPool::compute_offsets() {
2371 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2372 // This null test can be removed post beta
2373 if (k != NULL) {
2374 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2375 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2376 }
2377 }
2379 void java_lang_reflect_Parameter::compute_offsets() {
2380 Klass* k = SystemDictionary::reflect_Parameter_klass();
2381 if(NULL != k) {
2382 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2383 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2384 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature());
2385 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature());
2386 }
2387 }
2389 Handle java_lang_reflect_Parameter::create(TRAPS) {
2390 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2391 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2392 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2393 instanceKlassHandle klass (THREAD, k);
2394 // Ensure it is initialized
2395 klass->initialize(CHECK_NH);
2396 return klass->allocate_instance_handle(CHECK_NH);
2397 }
2399 oop java_lang_reflect_Parameter::name(oop param) {
2400 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2401 return param->obj_field(name_offset);
2402 }
2404 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2405 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2406 param->obj_field_put(name_offset, value);
2407 }
2409 int java_lang_reflect_Parameter::modifiers(oop param) {
2410 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2411 return param->int_field(modifiers_offset);
2412 }
2414 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2415 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2416 param->int_field_put(modifiers_offset, value);
2417 }
2419 int java_lang_reflect_Parameter::index(oop param) {
2420 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2421 return param->int_field(index_offset);
2422 }
2424 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2425 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2426 param->int_field_put(index_offset, value);
2427 }
2429 oop java_lang_reflect_Parameter::executable(oop param) {
2430 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2431 return param->obj_field(executable_offset);
2432 }
2434 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2435 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2436 param->obj_field_put(executable_offset, value);
2437 }
2440 Handle sun_reflect_ConstantPool::create(TRAPS) {
2441 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2442 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2443 instanceKlassHandle klass (THREAD, k);
2444 // Ensure it is initialized
2445 klass->initialize(CHECK_NH);
2446 return klass->allocate_instance_handle(CHECK_NH);
2447 }
2450 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2451 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2452 oop mirror = value->pool_holder()->java_mirror();
2453 // Save the mirror to get back the constant pool.
2454 reflect->obj_field_put(_oop_offset, mirror);
2455 }
2457 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) {
2458 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2460 oop mirror = reflect->obj_field(_oop_offset);
2461 Klass* k = java_lang_Class::as_Klass(mirror);
2462 assert(k->oop_is_instance(), "Must be");
2464 // Get the constant pool back from the klass. Since class redefinition
2465 // merges the new constant pool into the old, this is essentially the
2466 // same constant pool as the original. If constant pool merging is
2467 // no longer done in the future, this will have to change to save
2468 // the original.
2469 return InstanceKlass::cast(k)->constants();
2470 }
2472 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2473 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2474 // This null test can be removed post beta
2475 if (k != NULL) {
2476 compute_offset(_base_offset, k,
2477 vmSymbols::base_name(), vmSymbols::object_signature());
2478 }
2479 }
2481 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2482 Klass* k = SystemDictionary::box_klass(type);
2483 if (k == NULL) return NULL;
2484 instanceKlassHandle h (THREAD, k);
2485 if (!h->is_initialized()) h->initialize(CHECK_0);
2486 return h->allocate_instance(THREAD);
2487 }
2490 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2491 oop box = initialize_and_allocate(type, CHECK_0);
2492 if (box == NULL) return NULL;
2493 switch (type) {
2494 case T_BOOLEAN:
2495 box->bool_field_put(value_offset, value->z);
2496 break;
2497 case T_CHAR:
2498 box->char_field_put(value_offset, value->c);
2499 break;
2500 case T_FLOAT:
2501 box->float_field_put(value_offset, value->f);
2502 break;
2503 case T_DOUBLE:
2504 box->double_field_put(long_value_offset, value->d);
2505 break;
2506 case T_BYTE:
2507 box->byte_field_put(value_offset, value->b);
2508 break;
2509 case T_SHORT:
2510 box->short_field_put(value_offset, value->s);
2511 break;
2512 case T_INT:
2513 box->int_field_put(value_offset, value->i);
2514 break;
2515 case T_LONG:
2516 box->long_field_put(long_value_offset, value->j);
2517 break;
2518 default:
2519 return NULL;
2520 }
2521 return box;
2522 }
2525 BasicType java_lang_boxing_object::basic_type(oop box) {
2526 if (box == NULL) return T_ILLEGAL;
2527 BasicType type = SystemDictionary::box_klass_type(box->klass());
2528 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2529 return T_ILLEGAL;
2530 return type;
2531 }
2534 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2535 BasicType type = SystemDictionary::box_klass_type(box->klass());
2536 switch (type) {
2537 case T_BOOLEAN:
2538 value->z = box->bool_field(value_offset);
2539 break;
2540 case T_CHAR:
2541 value->c = box->char_field(value_offset);
2542 break;
2543 case T_FLOAT:
2544 value->f = box->float_field(value_offset);
2545 break;
2546 case T_DOUBLE:
2547 value->d = box->double_field(long_value_offset);
2548 break;
2549 case T_BYTE:
2550 value->b = box->byte_field(value_offset);
2551 break;
2552 case T_SHORT:
2553 value->s = box->short_field(value_offset);
2554 break;
2555 case T_INT:
2556 value->i = box->int_field(value_offset);
2557 break;
2558 case T_LONG:
2559 value->j = box->long_field(long_value_offset);
2560 break;
2561 default:
2562 return T_ILLEGAL;
2563 } // end switch
2564 return type;
2565 }
2568 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2569 BasicType type = SystemDictionary::box_klass_type(box->klass());
2570 switch (type) {
2571 case T_BOOLEAN:
2572 box->bool_field_put(value_offset, value->z);
2573 break;
2574 case T_CHAR:
2575 box->char_field_put(value_offset, value->c);
2576 break;
2577 case T_FLOAT:
2578 box->float_field_put(value_offset, value->f);
2579 break;
2580 case T_DOUBLE:
2581 box->double_field_put(long_value_offset, value->d);
2582 break;
2583 case T_BYTE:
2584 box->byte_field_put(value_offset, value->b);
2585 break;
2586 case T_SHORT:
2587 box->short_field_put(value_offset, value->s);
2588 break;
2589 case T_INT:
2590 box->int_field_put(value_offset, value->i);
2591 break;
2592 case T_LONG:
2593 box->long_field_put(long_value_offset, value->j);
2594 break;
2595 default:
2596 return T_ILLEGAL;
2597 } // end switch
2598 return type;
2599 }
2602 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2603 switch (type) {
2604 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2605 case T_CHAR: st->print("%d", value->c); break;
2606 case T_BYTE: st->print("%d", value->b); break;
2607 case T_SHORT: st->print("%d", value->s); break;
2608 case T_INT: st->print("%d", value->i); break;
2609 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2610 case T_FLOAT: st->print("%f", value->f); break;
2611 case T_DOUBLE: st->print("%lf", value->d); break;
2612 default: st->print("type %d?", type); break;
2613 }
2614 }
2617 // Support for java_lang_ref_Reference
2618 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() {
2619 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2620 address addr = ik->static_field_addr(static_lock_offset);
2621 return (HeapWord*) addr;
2622 }
2624 oop java_lang_ref_Reference::pending_list_lock() {
2625 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2626 address addr = ik->static_field_addr(static_lock_offset);
2627 if (UseCompressedOops) {
2628 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2629 } else {
2630 return oopDesc::load_decode_heap_oop((oop*)addr);
2631 }
2632 }
2634 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2635 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2636 address addr = ik->static_field_addr(static_pending_offset);
2637 // XXX This might not be HeapWord aligned, almost rather be char *.
2638 return (HeapWord*)addr;
2639 }
2641 oop java_lang_ref_Reference::pending_list() {
2642 char *addr = (char *)pending_list_addr();
2643 if (UseCompressedOops) {
2644 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2645 } else {
2646 return oopDesc::load_decode_heap_oop((oop*)addr);
2647 }
2648 }
2651 // Support for java_lang_ref_SoftReference
2653 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2654 return ref->long_field(timestamp_offset);
2655 }
2657 jlong java_lang_ref_SoftReference::clock() {
2658 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2659 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2660 return *offset;
2661 }
2663 void java_lang_ref_SoftReference::set_clock(jlong value) {
2664 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2665 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2666 *offset = value;
2667 }
2669 // Support for java_lang_invoke_DirectMethodHandle
2671 int java_lang_invoke_DirectMethodHandle::_member_offset;
2673 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
2674 oop member_name = NULL;
2675 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
2676 assert(is_dmh, "a DirectMethodHandle oop is expected");
2677 if (is_dmh) {
2678 member_name = dmh->obj_field(member_offset_in_bytes());
2679 }
2680 return member_name;
2681 }
2683 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
2684 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
2685 if (klass_oop != NULL && EnableInvokeDynamic) {
2686 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2687 }
2688 }
2690 // Support for java_lang_invoke_MethodHandle
2692 int java_lang_invoke_MethodHandle::_type_offset;
2693 int java_lang_invoke_MethodHandle::_form_offset;
2695 int java_lang_invoke_MemberName::_clazz_offset;
2696 int java_lang_invoke_MemberName::_name_offset;
2697 int java_lang_invoke_MemberName::_type_offset;
2698 int java_lang_invoke_MemberName::_flags_offset;
2699 int java_lang_invoke_MemberName::_vmtarget_offset;
2700 int java_lang_invoke_MemberName::_vmloader_offset;
2701 int java_lang_invoke_MemberName::_vmindex_offset;
2703 int java_lang_invoke_LambdaForm::_vmentry_offset;
2705 void java_lang_invoke_MethodHandle::compute_offsets() {
2706 Klass* klass_oop = SystemDictionary::MethodHandle_klass();
2707 if (klass_oop != NULL && EnableInvokeDynamic) {
2708 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
2709 compute_optional_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
2710 if (_form_offset == 0) {
2711 EnableInvokeDynamic = false;
2712 }
2713 }
2714 }
2716 void java_lang_invoke_MemberName::compute_offsets() {
2717 Klass* klass_oop = SystemDictionary::MemberName_klass();
2718 if (klass_oop != NULL && EnableInvokeDynamic) {
2719 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature());
2720 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature());
2721 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature());
2722 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature());
2723 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2724 }
2725 }
2727 void java_lang_invoke_LambdaForm::compute_offsets() {
2728 Klass* klass_oop = SystemDictionary::LambdaForm_klass();
2729 if (klass_oop != NULL && EnableInvokeDynamic) {
2730 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2731 }
2732 }
2734 oop java_lang_invoke_MethodHandle::type(oop mh) {
2735 return mh->obj_field(_type_offset);
2736 }
2738 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
2739 mh->obj_field_put(_type_offset, mtype);
2740 }
2742 oop java_lang_invoke_MethodHandle::form(oop mh) {
2743 assert(_form_offset != 0, "");
2744 return mh->obj_field(_form_offset);
2745 }
2747 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
2748 assert(_form_offset != 0, "");
2749 mh->obj_field_put(_form_offset, lform);
2750 }
2752 /// MemberName accessors
2754 oop java_lang_invoke_MemberName::clazz(oop mname) {
2755 assert(is_instance(mname), "wrong type");
2756 return mname->obj_field(_clazz_offset);
2757 }
2759 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
2760 assert(is_instance(mname), "wrong type");
2761 mname->obj_field_put(_clazz_offset, clazz);
2762 }
2764 oop java_lang_invoke_MemberName::name(oop mname) {
2765 assert(is_instance(mname), "wrong type");
2766 return mname->obj_field(_name_offset);
2767 }
2769 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
2770 assert(is_instance(mname), "wrong type");
2771 mname->obj_field_put(_name_offset, name);
2772 }
2774 oop java_lang_invoke_MemberName::type(oop mname) {
2775 assert(is_instance(mname), "wrong type");
2776 return mname->obj_field(_type_offset);
2777 }
2779 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
2780 assert(is_instance(mname), "wrong type");
2781 mname->obj_field_put(_type_offset, type);
2782 }
2784 int java_lang_invoke_MemberName::flags(oop mname) {
2785 assert(is_instance(mname), "wrong type");
2786 return mname->int_field(_flags_offset);
2787 }
2789 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
2790 assert(is_instance(mname), "wrong type");
2791 mname->int_field_put(_flags_offset, flags);
2792 }
2794 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
2795 assert(is_instance(mname), "wrong type");
2796 return (Metadata*)mname->address_field(_vmtarget_offset);
2797 }
2799 bool java_lang_invoke_MemberName::is_method(oop mname) {
2800 assert(is_instance(mname), "must be MemberName");
2801 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
2802 }
2804 #if INCLUDE_JVMTI
2805 // Can be executed on VM thread only
2806 void java_lang_invoke_MemberName::adjust_vmtarget(oop mname, Method* old_method,
2807 Method* new_method, bool* trace_name_printed) {
2808 assert(is_method(mname), "wrong type");
2809 assert(Thread::current()->is_VM_thread(), "not VM thread");
2811 Method* target = (Method*)mname->address_field(_vmtarget_offset);
2812 if (target == old_method) {
2813 mname->address_field_put(_vmtarget_offset, (address)new_method);
2815 if (RC_TRACE_IN_RANGE(0x00100000, 0x00400000)) {
2816 if (!(*trace_name_printed)) {
2817 // RC_TRACE_MESG macro has an embedded ResourceMark
2818 RC_TRACE_MESG(("adjust: name=%s",
2819 old_method->method_holder()->external_name()));
2820 *trace_name_printed = true;
2821 }
2822 // RC_TRACE macro has an embedded ResourceMark
2823 RC_TRACE(0x00400000, ("MemberName method update: %s(%s)",
2824 new_method->name()->as_C_string(),
2825 new_method->signature()->as_C_string()));
2826 }
2827 }
2828 }
2829 #endif // INCLUDE_JVMTI
2831 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
2832 assert(is_instance(mname), "wrong type");
2833 // check the type of the vmtarget
2834 oop dependency = NULL;
2835 if (ref != NULL) {
2836 switch (flags(mname) & (MN_IS_METHOD |
2837 MN_IS_CONSTRUCTOR |
2838 MN_IS_FIELD)) {
2839 case MN_IS_METHOD:
2840 case MN_IS_CONSTRUCTOR:
2841 assert(ref->is_method(), "should be a method");
2842 dependency = ((Method*)ref)->method_holder()->java_mirror();
2843 break;
2844 case MN_IS_FIELD:
2845 assert(ref->is_klass(), "should be a class");
2846 dependency = ((Klass*)ref)->java_mirror();
2847 break;
2848 default:
2849 ShouldNotReachHere();
2850 }
2851 }
2852 mname->address_field_put(_vmtarget_offset, (address)ref);
2853 // Add a reference to the loader (actually mirror because anonymous classes will not have
2854 // distinct loaders) to ensure the metadata is kept alive
2855 // This mirror may be different than the one in clazz field.
2856 mname->obj_field_put(_vmloader_offset, dependency);
2857 }
2859 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
2860 assert(is_instance(mname), "wrong type");
2861 return (intptr_t) mname->address_field(_vmindex_offset);
2862 }
2864 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
2865 assert(is_instance(mname), "wrong type");
2866 mname->address_field_put(_vmindex_offset, (address) index);
2867 }
2869 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
2870 assert(is_instance(lform), "wrong type");
2871 return lform->obj_field(_vmentry_offset);
2872 }
2875 // Support for java_lang_invoke_MethodType
2877 int java_lang_invoke_MethodType::_rtype_offset;
2878 int java_lang_invoke_MethodType::_ptypes_offset;
2880 void java_lang_invoke_MethodType::compute_offsets() {
2881 Klass* k = SystemDictionary::MethodType_klass();
2882 if (k != NULL) {
2883 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2884 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2885 }
2886 }
2888 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
2889 st->print("(");
2890 objArrayOop pts = ptypes(mt);
2891 for (int i = 0, limit = pts->length(); i < limit; i++) {
2892 java_lang_Class::print_signature(pts->obj_at(i), st);
2893 }
2894 st->print(")");
2895 java_lang_Class::print_signature(rtype(mt), st);
2896 }
2898 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2899 ResourceMark rm;
2900 stringStream buffer(128);
2901 print_signature(mt, &buffer);
2902 const char* sigstr = buffer.base();
2903 int siglen = (int) buffer.size();
2904 Symbol *name;
2905 if (!intern_if_not_found) {
2906 name = SymbolTable::probe(sigstr, siglen);
2907 } else {
2908 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2909 }
2910 return name;
2911 }
2913 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
2914 if (mt1 == mt2)
2915 return true;
2916 if (rtype(mt1) != rtype(mt2))
2917 return false;
2918 if (ptype_count(mt1) != ptype_count(mt2))
2919 return false;
2920 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
2921 if (ptype(mt1, i) != ptype(mt2, i))
2922 return false;
2923 }
2924 return true;
2925 }
2927 oop java_lang_invoke_MethodType::rtype(oop mt) {
2928 assert(is_instance(mt), "must be a MethodType");
2929 return mt->obj_field(_rtype_offset);
2930 }
2932 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
2933 assert(is_instance(mt), "must be a MethodType");
2934 return (objArrayOop) mt->obj_field(_ptypes_offset);
2935 }
2937 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
2938 return ptypes(mt)->obj_at(idx);
2939 }
2941 int java_lang_invoke_MethodType::ptype_count(oop mt) {
2942 return ptypes(mt)->length();
2943 }
2945 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
2946 objArrayOop pts = ptypes(mt);
2947 int count = pts->length();
2948 int slots = 0;
2949 for (int i = 0; i < count; i++) {
2950 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
2951 slots += type2size[bt];
2952 }
2953 return slots;
2954 }
2956 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
2957 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
2958 return type2size[bt];
2959 }
2962 // Support for java_lang_invoke_CallSite
2964 int java_lang_invoke_CallSite::_target_offset;
2966 void java_lang_invoke_CallSite::compute_offsets() {
2967 if (!EnableInvokeDynamic) return;
2968 Klass* k = SystemDictionary::CallSite_klass();
2969 if (k != NULL) {
2970 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
2971 }
2972 }
2975 // Support for java_security_AccessControlContext
2977 int java_security_AccessControlContext::_context_offset = 0;
2978 int java_security_AccessControlContext::_privilegedContext_offset = 0;
2979 int java_security_AccessControlContext::_isPrivileged_offset = 0;
2980 int java_security_AccessControlContext::_isAuthorized_offset = -1;
2982 void java_security_AccessControlContext::compute_offsets() {
2983 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
2984 fieldDescriptor fd;
2985 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass());
2987 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
2988 fatal("Invalid layout of java.security.AccessControlContext");
2989 }
2990 _context_offset = fd.offset();
2992 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
2993 fatal("Invalid layout of java.security.AccessControlContext");
2994 }
2995 _privilegedContext_offset = fd.offset();
2997 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
2998 fatal("Invalid layout of java.security.AccessControlContext");
2999 }
3000 _isPrivileged_offset = fd.offset();
3002 // The offset may not be present for bootstrapping with older JDK.
3003 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
3004 _isAuthorized_offset = fd.offset();
3005 }
3006 }
3009 bool java_security_AccessControlContext::is_authorized(Handle context) {
3010 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
3011 assert(_isAuthorized_offset != -1, "should be set");
3012 return context->bool_field(_isAuthorized_offset) != 0;
3013 }
3015 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3016 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3017 // Ensure klass is initialized
3018 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
3019 // Allocate result
3020 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
3021 // Fill in values
3022 result->obj_field_put(_context_offset, context());
3023 result->obj_field_put(_privilegedContext_offset, privileged_context());
3024 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3025 // whitelist AccessControlContexts created by the JVM if present
3026 if (_isAuthorized_offset != -1) {
3027 result->bool_field_put(_isAuthorized_offset, true);
3028 }
3029 return result;
3030 }
3033 // Support for java_lang_ClassLoader
3035 bool java_lang_ClassLoader::offsets_computed = false;
3036 int java_lang_ClassLoader::_loader_data_offset = -1;
3037 int java_lang_ClassLoader::parallelCapable_offset = -1;
3039 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
3040 assert(loader != NULL && loader->is_oop(), "loader must be oop");
3041 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
3042 }
3044 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
3045 return *java_lang_ClassLoader::loader_data_addr(loader);
3046 }
3048 void java_lang_ClassLoader::compute_offsets() {
3049 assert(!offsets_computed, "offsets should be initialized only once");
3050 offsets_computed = true;
3052 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
3053 Klass* k1 = SystemDictionary::ClassLoader_klass();
3054 compute_optional_offset(parallelCapable_offset,
3055 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
3057 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3058 }
3060 oop java_lang_ClassLoader::parent(oop loader) {
3061 assert(is_instance(loader), "loader must be oop");
3062 return loader->obj_field(parent_offset);
3063 }
3065 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3066 assert(is_instance(loader), "loader must be oop");
3067 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3068 oop acl = loader;
3069 debug_only(jint loop_count = 0);
3070 // This loop taken verbatim from ClassLoader.java:
3071 do {
3072 acl = parent(acl);
3073 if (cl == acl) {
3074 return true;
3075 }
3076 assert(++loop_count > 0, "loop_count overflow");
3077 } while (acl != NULL);
3078 return false;
3079 }
3082 // For class loader classes, parallelCapable defined
3083 // based on non-null field
3084 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3085 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3086 if (!JDK_Version::is_gte_jdk17x_version()
3087 || parallelCapable_offset == -1) {
3088 // Default for backward compatibility is false
3089 return false;
3090 }
3091 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3092 }
3094 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3095 // Fix for 4474172; see evaluation for more details
3096 loader = non_reflection_class_loader(loader);
3098 oop cl = SystemDictionary::java_system_loader();
3099 while(cl != NULL) {
3100 if (cl == loader) return true;
3101 cl = parent(cl);
3102 }
3103 return false;
3104 }
3106 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3107 if (loader != NULL) {
3108 // See whether this is one of the class loaders associated with
3109 // the generated bytecodes for reflection, and if so, "magically"
3110 // delegate to its parent to prevent class loading from occurring
3111 // in places where applications using reflection didn't expect it.
3112 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3113 // This might be null in non-1.4 JDKs
3114 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
3115 return parent(loader);
3116 }
3117 }
3118 return loader;
3119 }
3122 // Support for java_lang_System
3123 int java_lang_System::in_offset_in_bytes() {
3124 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3125 }
3128 int java_lang_System::out_offset_in_bytes() {
3129 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3130 }
3133 int java_lang_System::err_offset_in_bytes() {
3134 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3135 }
3138 bool java_lang_System::has_security_manager() {
3139 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass());
3140 address addr = ik->static_field_addr(static_security_offset);
3141 if (UseCompressedOops) {
3142 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3143 } else {
3144 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3145 }
3146 }
3148 int java_lang_Class::_klass_offset;
3149 int java_lang_Class::_array_klass_offset;
3150 int java_lang_Class::_oop_size_offset;
3151 int java_lang_Class::_static_oop_field_count_offset;
3152 int java_lang_Class::_class_loader_offset;
3153 int java_lang_Class::_protection_domain_offset;
3154 int java_lang_Class::_init_lock_offset;
3155 int java_lang_Class::_signers_offset;
3156 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3157 int java_lang_Throwable::backtrace_offset;
3158 int java_lang_Throwable::detailMessage_offset;
3159 int java_lang_Throwable::cause_offset;
3160 int java_lang_Throwable::stackTrace_offset;
3161 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3162 int java_lang_reflect_AccessibleObject::override_offset;
3163 int java_lang_reflect_Method::clazz_offset;
3164 int java_lang_reflect_Method::name_offset;
3165 int java_lang_reflect_Method::returnType_offset;
3166 int java_lang_reflect_Method::parameterTypes_offset;
3167 int java_lang_reflect_Method::exceptionTypes_offset;
3168 int java_lang_reflect_Method::slot_offset;
3169 int java_lang_reflect_Method::modifiers_offset;
3170 int java_lang_reflect_Method::signature_offset;
3171 int java_lang_reflect_Method::annotations_offset;
3172 int java_lang_reflect_Method::parameter_annotations_offset;
3173 int java_lang_reflect_Method::annotation_default_offset;
3174 int java_lang_reflect_Method::type_annotations_offset;
3175 int java_lang_reflect_Constructor::clazz_offset;
3176 int java_lang_reflect_Constructor::parameterTypes_offset;
3177 int java_lang_reflect_Constructor::exceptionTypes_offset;
3178 int java_lang_reflect_Constructor::slot_offset;
3179 int java_lang_reflect_Constructor::modifiers_offset;
3180 int java_lang_reflect_Constructor::signature_offset;
3181 int java_lang_reflect_Constructor::annotations_offset;
3182 int java_lang_reflect_Constructor::parameter_annotations_offset;
3183 int java_lang_reflect_Constructor::type_annotations_offset;
3184 int java_lang_reflect_Field::clazz_offset;
3185 int java_lang_reflect_Field::name_offset;
3186 int java_lang_reflect_Field::type_offset;
3187 int java_lang_reflect_Field::slot_offset;
3188 int java_lang_reflect_Field::modifiers_offset;
3189 int java_lang_reflect_Field::signature_offset;
3190 int java_lang_reflect_Field::annotations_offset;
3191 int java_lang_reflect_Field::type_annotations_offset;
3192 int java_lang_reflect_Parameter::name_offset;
3193 int java_lang_reflect_Parameter::modifiers_offset;
3194 int java_lang_reflect_Parameter::index_offset;
3195 int java_lang_reflect_Parameter::executable_offset;
3196 int java_lang_boxing_object::value_offset;
3197 int java_lang_boxing_object::long_value_offset;
3198 int java_lang_ref_Reference::referent_offset;
3199 int java_lang_ref_Reference::queue_offset;
3200 int java_lang_ref_Reference::next_offset;
3201 int java_lang_ref_Reference::discovered_offset;
3202 int java_lang_ref_Reference::static_lock_offset;
3203 int java_lang_ref_Reference::static_pending_offset;
3204 int java_lang_ref_Reference::number_of_fake_oop_fields;
3205 int java_lang_ref_SoftReference::timestamp_offset;
3206 int java_lang_ref_SoftReference::static_clock_offset;
3207 int java_lang_ClassLoader::parent_offset;
3208 int java_lang_System::static_in_offset;
3209 int java_lang_System::static_out_offset;
3210 int java_lang_System::static_err_offset;
3211 int java_lang_System::static_security_offset;
3212 int java_lang_StackTraceElement::declaringClass_offset;
3213 int java_lang_StackTraceElement::methodName_offset;
3214 int java_lang_StackTraceElement::fileName_offset;
3215 int java_lang_StackTraceElement::lineNumber_offset;
3216 int java_lang_AssertionStatusDirectives::classes_offset;
3217 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3218 int java_lang_AssertionStatusDirectives::packages_offset;
3219 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3220 int java_lang_AssertionStatusDirectives::deflt_offset;
3221 int java_nio_Buffer::_limit_offset;
3222 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3223 int sun_reflect_ConstantPool::_oop_offset;
3224 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3227 // Support for java_lang_StackTraceElement
3229 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3230 element->obj_field_put(fileName_offset, value);
3231 }
3233 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3234 element->obj_field_put(declaringClass_offset, value);
3235 }
3237 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3238 element->obj_field_put(methodName_offset, value);
3239 }
3241 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3242 element->int_field_put(lineNumber_offset, value);
3243 }
3246 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3248 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3249 o->obj_field_put(classes_offset, val);
3250 }
3252 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3253 o->obj_field_put(classEnabled_offset, val);
3254 }
3256 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3257 o->obj_field_put(packages_offset, val);
3258 }
3260 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3261 o->obj_field_put(packageEnabled_offset, val);
3262 }
3264 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3265 o->bool_field_put(deflt_offset, val);
3266 }
3269 // Support for intrinsification of java.nio.Buffer.checkIndex
3270 int java_nio_Buffer::limit_offset() {
3271 return _limit_offset;
3272 }
3275 void java_nio_Buffer::compute_offsets() {
3276 Klass* k = SystemDictionary::nio_Buffer_klass();
3277 assert(k != NULL, "must be loaded in 1.4+");
3278 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3279 }
3281 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3282 if (_owner_offset != 0) return;
3284 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
3285 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3286 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3287 compute_offset(_owner_offset, k,
3288 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3289 }
3291 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3292 assert(_owner_offset != 0, "Must be initialized");
3293 return obj->obj_field(_owner_offset);
3294 }
3296 // Compute hard-coded offsets
3297 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3298 // are not available to determine the offset_of_static_fields.
3299 void JavaClasses::compute_hard_coded_offsets() {
3300 const int x = heapOopSize;
3301 const int header = instanceOopDesc::base_offset_in_bytes();
3303 // Throwable Class
3304 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
3305 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3306 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
3307 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3308 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x;
3310 // java_lang_boxing_object
3311 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3312 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3314 // java_lang_ref_Reference:
3315 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3316 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3317 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
3318 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
3319 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
3320 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3321 // Artificial fields for java_lang_ref_Reference
3322 // The first field is for the discovered field added in 1.4
3323 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3325 // java_lang_ref_SoftReference Class
3326 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3327 // Don't multiply static fields because they are always in wordSize units
3328 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3330 // java_lang_ClassLoader
3331 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3333 // java_lang_System
3334 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
3335 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3336 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3337 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3339 // java_lang_StackTraceElement
3340 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
3341 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3342 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
3343 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3344 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3345 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3346 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3347 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3348 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3350 }
3353 // Compute non-hard-coded field offsets of all the classes in this file
3354 void JavaClasses::compute_offsets() {
3355 // java_lang_Class::compute_offsets was called earlier in bootstrap
3356 java_lang_ClassLoader::compute_offsets();
3357 java_lang_Thread::compute_offsets();
3358 java_lang_ThreadGroup::compute_offsets();
3359 if (EnableInvokeDynamic) {
3360 java_lang_invoke_MethodHandle::compute_offsets();
3361 java_lang_invoke_DirectMethodHandle::compute_offsets();
3362 java_lang_invoke_MemberName::compute_offsets();
3363 java_lang_invoke_LambdaForm::compute_offsets();
3364 java_lang_invoke_MethodType::compute_offsets();
3365 java_lang_invoke_CallSite::compute_offsets();
3366 }
3367 java_security_AccessControlContext::compute_offsets();
3368 // Initialize reflection classes. The layouts of these classes
3369 // changed with the new reflection implementation in JDK 1.4, and
3370 // since the Universe doesn't know what JDK version it is until this
3371 // point we defer computation of these offsets until now.
3372 java_lang_reflect_AccessibleObject::compute_offsets();
3373 java_lang_reflect_Method::compute_offsets();
3374 java_lang_reflect_Constructor::compute_offsets();
3375 java_lang_reflect_Field::compute_offsets();
3376 if (JDK_Version::is_gte_jdk14x_version()) {
3377 java_nio_Buffer::compute_offsets();
3378 }
3379 if (JDK_Version::is_gte_jdk15x_version()) {
3380 sun_reflect_ConstantPool::compute_offsets();
3381 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3382 }
3383 if (JDK_Version::is_jdk18x_version())
3384 java_lang_reflect_Parameter::compute_offsets();
3386 // generated interpreter code wants to know about the offsets we just computed:
3387 AbstractAssembler::update_delayed_values();
3388 }
3390 #ifndef PRODUCT
3392 // These functions exist to assert the validity of hard-coded field offsets to guard
3393 // against changes in the class files
3395 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3396 EXCEPTION_MARK;
3397 fieldDescriptor fd;
3398 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3399 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3400 instanceKlassHandle h_klass (THREAD, k);
3401 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3402 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3403 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3404 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3405 return false;
3406 }
3407 if (fd.is_static()) {
3408 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3409 return false;
3410 }
3411 if (fd.offset() == hardcoded_offset ) {
3412 return true;
3413 } else {
3414 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3415 klass_name, field_name, hardcoded_offset, fd.offset());
3416 return false;
3417 }
3418 }
3421 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3422 EXCEPTION_MARK;
3423 fieldDescriptor fd;
3424 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3425 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3426 instanceKlassHandle h_klass (THREAD, k);
3427 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3428 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3429 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3430 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3431 return false;
3432 }
3433 if (!fd.is_static()) {
3434 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3435 return false;
3436 }
3437 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3438 return true;
3439 } else {
3440 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());
3441 return false;
3442 }
3443 }
3446 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3447 EXCEPTION_MARK;
3448 fieldDescriptor fd;
3449 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3450 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3451 instanceKlassHandle h_klass (THREAD, k);
3452 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3453 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3454 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3455 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3456 return false;
3457 }
3458 if (!fd.is_static() || !fd.has_initial_value()) {
3459 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3460 return false;
3461 }
3462 if (!fd.initial_value_tag().is_int()) {
3463 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3464 return false;
3465 }
3466 jint field_value = fd.int_initial_value();
3467 if (field_value == hardcoded_constant) {
3468 return true;
3469 } else {
3470 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);
3471 return false;
3472 }
3473 }
3476 // Check the hard-coded field offsets of all the classes in this file
3478 void JavaClasses::check_offsets() {
3479 bool valid = true;
3480 HandleMark hm;
3482 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3483 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3485 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3486 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3488 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3489 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3491 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3492 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3494 // java.lang.String
3496 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3497 if (java_lang_String::has_offset_field()) {
3498 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3499 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3500 }
3501 if (java_lang_String::has_hash_field()) {
3502 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3503 }
3505 // java.lang.Class
3507 // Fake fields
3508 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3509 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3511 // java.lang.Throwable
3513 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3514 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3515 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3516 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3518 // Boxed primitive objects (java_lang_boxing_object)
3520 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3521 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3522 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3523 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3524 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3525 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3526 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3527 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3529 // java.lang.ClassLoader
3531 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3533 // java.lang.System
3535 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3536 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3537 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3538 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
3540 // java.lang.StackTraceElement
3542 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3543 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3544 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3545 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3547 // java.lang.ref.Reference
3549 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3550 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3551 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3552 // Fake field
3553 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3554 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3555 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3557 // java.lang.ref.SoftReference
3559 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3560 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3562 // java.lang.AssertionStatusDirectives
3563 //
3564 // The CheckAssertionStatusDirectives boolean can be removed from here and
3565 // globals.hpp after the AssertionStatusDirectives class has been integrated
3566 // into merlin "for some time." Without it, the vm will fail with early
3567 // merlin builds.
3569 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) {
3570 const char* nm = "java/lang/AssertionStatusDirectives";
3571 const char* sig = "[Ljava/lang/String;";
3572 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3573 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3574 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3575 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3576 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3577 }
3579 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3580 }
3582 #endif // PRODUCT
3584 int InjectedField::compute_offset() {
3585 Klass* klass_oop = klass();
3586 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3587 if (!may_be_java && !fs.access_flags().is_internal()) {
3588 // Only look at injected fields
3589 continue;
3590 }
3591 if (fs.name() == name() && fs.signature() == signature()) {
3592 return fs.offset();
3593 }
3594 }
3595 ResourceMark rm;
3596 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)" : "");
3597 #ifndef PRODUCT
3598 klass_oop->print();
3599 tty->print_cr("all fields:");
3600 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3601 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
3602 }
3603 #endif //PRODUCT
3604 fatal("Invalid layout of preloaded class");
3605 return -1;
3606 }
3608 void javaClasses_init() {
3609 JavaClasses::compute_offsets();
3610 JavaClasses::check_offsets();
3611 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3612 }