Thu, 31 Mar 2016 14:23:12 -0700
Merge
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 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class");
128 }
129 dest_offset = fd.offset();
130 }
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 }
785 // Returns the Java name for this Java mirror (Resource allocated)
786 // See Klass::external_name().
787 // For primitive type Java mirrors, its type name is returned.
788 const char* java_lang_Class::as_external_name(oop java_class) {
789 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
790 const char* name = NULL;
791 if (is_primitive(java_class)) {
792 name = type2name(primitive_type(java_class));
793 } else {
794 name = as_Klass(java_class)->external_name();
795 }
796 if (name == NULL) {
797 name = "<null>";
798 }
799 return name;
800 }
802 Klass* java_lang_Class::array_klass(oop java_class) {
803 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
804 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass");
805 return k;
806 }
809 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
810 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass");
811 java_class->metadata_field_put(_array_klass_offset, klass);
812 }
815 bool java_lang_Class::is_primitive(oop java_class) {
816 // should assert:
817 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
818 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
820 #ifdef ASSERT
821 if (is_primitive) {
822 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
823 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
824 "Should be either the T_VOID primitive or a java primitive");
825 }
826 #endif
828 return is_primitive;
829 }
832 BasicType java_lang_Class::primitive_type(oop java_class) {
833 assert(java_lang_Class::is_primitive(java_class), "just checking");
834 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
835 BasicType type = T_VOID;
836 if (ak != NULL) {
837 // Note: create_basic_type_mirror above initializes ak to a non-null value.
838 type = ArrayKlass::cast(ak)->element_type();
839 } else {
840 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
841 }
842 assert(Universe::java_mirror(type) == java_class, "must be consistent");
843 return type;
844 }
846 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
847 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
848 if (is_primitive(java_class)) {
849 if (reference_klass != NULL)
850 (*reference_klass) = NULL;
851 return primitive_type(java_class);
852 } else {
853 if (reference_klass != NULL)
854 (*reference_klass) = as_Klass(java_class);
855 return T_OBJECT;
856 }
857 }
860 oop java_lang_Class::primitive_mirror(BasicType t) {
861 oop mirror = Universe::java_mirror(t);
862 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
863 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
864 return mirror;
865 }
867 bool java_lang_Class::offsets_computed = false;
868 int java_lang_Class::classRedefinedCount_offset = -1;
870 void java_lang_Class::compute_offsets() {
871 assert(!offsets_computed, "offsets should be initialized only once");
872 offsets_computed = true;
874 Klass* klass_oop = SystemDictionary::Class_klass();
875 // The classRedefinedCount field is only present starting in 1.5,
876 // so don't go fatal.
877 compute_optional_offset(classRedefinedCount_offset,
878 klass_oop, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
880 // Needs to be optional because the old build runs Queens during bootstrapping
881 // and jdk8-9 doesn't have coordinated pushes yet.
882 compute_optional_offset(_class_loader_offset,
883 klass_oop, vmSymbols::classLoader_name(),
884 vmSymbols::classloader_signature());
886 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
887 }
889 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
890 if (!JDK_Version::is_gte_jdk15x_version()
891 || classRedefinedCount_offset == -1) {
892 // The classRedefinedCount field is only present starting in 1.5.
893 // If we don't have an offset for it then just return -1 as a marker.
894 return -1;
895 }
897 return the_class_mirror->int_field(classRedefinedCount_offset);
898 }
900 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
901 if (!JDK_Version::is_gte_jdk15x_version()
902 || classRedefinedCount_offset == -1) {
903 // The classRedefinedCount field is only present starting in 1.5.
904 // If we don't have an offset for it then nothing to set.
905 return;
906 }
908 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
909 }
912 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
913 // platform thread structure, and a eetop offset which was used for thread
914 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
915 // merged, so in the HotSpot VM we just use the eetop field for the thread
916 // instead of the privateInfo_offset.
917 //
918 // Note: The stackSize field is only present starting in 1.4.
920 int java_lang_Thread::_name_offset = 0;
921 int java_lang_Thread::_group_offset = 0;
922 int java_lang_Thread::_contextClassLoader_offset = 0;
923 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
924 int java_lang_Thread::_priority_offset = 0;
925 int java_lang_Thread::_eetop_offset = 0;
926 int java_lang_Thread::_daemon_offset = 0;
927 int java_lang_Thread::_stillborn_offset = 0;
928 int java_lang_Thread::_stackSize_offset = 0;
929 int java_lang_Thread::_tid_offset = 0;
930 int java_lang_Thread::_thread_status_offset = 0;
931 int java_lang_Thread::_park_blocker_offset = 0;
932 int java_lang_Thread::_park_event_offset = 0 ;
935 void java_lang_Thread::compute_offsets() {
936 assert(_group_offset == 0, "offsets should be initialized only once");
938 Klass* k = SystemDictionary::Thread_klass();
939 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature());
940 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
941 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
942 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
943 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
944 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
945 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
946 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
947 // The stackSize field is only present starting in 1.4, so don't go fatal.
948 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
949 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
950 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
951 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
952 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
953 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
954 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
955 vmSymbols::long_signature());
956 }
959 JavaThread* java_lang_Thread::thread(oop java_thread) {
960 return (JavaThread*)java_thread->address_field(_eetop_offset);
961 }
964 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
965 java_thread->address_field_put(_eetop_offset, (address)thread);
966 }
969 typeArrayOop java_lang_Thread::name(oop java_thread) {
970 oop name = java_thread->obj_field(_name_offset);
971 assert(name == NULL || (name->is_typeArray() && TypeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking");
972 return typeArrayOop(name);
973 }
976 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) {
977 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL");
978 java_thread->obj_field_put(_name_offset, name);
979 }
982 ThreadPriority java_lang_Thread::priority(oop java_thread) {
983 return (ThreadPriority)java_thread->int_field(_priority_offset);
984 }
987 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
988 java_thread->int_field_put(_priority_offset, priority);
989 }
992 oop java_lang_Thread::threadGroup(oop java_thread) {
993 return java_thread->obj_field(_group_offset);
994 }
997 bool java_lang_Thread::is_stillborn(oop java_thread) {
998 return java_thread->bool_field(_stillborn_offset) != 0;
999 }
1002 // We never have reason to turn the stillborn bit off
1003 void java_lang_Thread::set_stillborn(oop java_thread) {
1004 java_thread->bool_field_put(_stillborn_offset, true);
1005 }
1008 bool java_lang_Thread::is_alive(oop java_thread) {
1009 JavaThread* thr = java_lang_Thread::thread(java_thread);
1010 return (thr != NULL);
1011 }
1014 bool java_lang_Thread::is_daemon(oop java_thread) {
1015 return java_thread->bool_field(_daemon_offset) != 0;
1016 }
1019 void java_lang_Thread::set_daemon(oop java_thread) {
1020 java_thread->bool_field_put(_daemon_offset, true);
1021 }
1023 oop java_lang_Thread::context_class_loader(oop java_thread) {
1024 return java_thread->obj_field(_contextClassLoader_offset);
1025 }
1027 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1028 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1029 }
1032 jlong java_lang_Thread::stackSize(oop java_thread) {
1033 // The stackSize field is only present starting in 1.4
1034 if (_stackSize_offset > 0) {
1035 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check");
1036 return java_thread->long_field(_stackSize_offset);
1037 } else {
1038 return 0;
1039 }
1040 }
1042 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1043 void java_lang_Thread::set_thread_status(oop java_thread,
1044 java_lang_Thread::ThreadStatus status) {
1045 // The threadStatus is only present starting in 1.5
1046 if (_thread_status_offset > 0) {
1047 java_thread->int_field_put(_thread_status_offset, status);
1048 }
1049 }
1051 // Read thread status value from threadStatus field in java.lang.Thread java class.
1052 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1053 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() ||
1054 JavaThread::current()->thread_state() == _thread_in_vm,
1055 "Java Thread is not running in vm");
1056 // The threadStatus is only present starting in 1.5
1057 if (_thread_status_offset > 0) {
1058 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1059 } else {
1060 // All we can easily figure out is if it is alive, but that is
1061 // enough info for a valid unknown status.
1062 // These aren't restricted to valid set ThreadStatus values, so
1063 // use JVMTI values and cast.
1064 JavaThread* thr = java_lang_Thread::thread(java_thread);
1065 if (thr == NULL) {
1066 // the thread hasn't run yet or is in the process of exiting
1067 return NEW;
1068 }
1069 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1070 }
1071 }
1074 jlong java_lang_Thread::thread_id(oop java_thread) {
1075 // The thread ID field is only present starting in 1.5
1076 if (_tid_offset > 0) {
1077 return java_thread->long_field(_tid_offset);
1078 } else {
1079 return 0;
1080 }
1081 }
1083 oop java_lang_Thread::park_blocker(oop java_thread) {
1084 assert(JDK_Version::current().supports_thread_park_blocker() &&
1085 _park_blocker_offset != 0, "Must support parkBlocker field");
1087 if (_park_blocker_offset > 0) {
1088 return java_thread->obj_field(_park_blocker_offset);
1089 }
1091 return NULL;
1092 }
1094 jlong java_lang_Thread::park_event(oop java_thread) {
1095 if (_park_event_offset > 0) {
1096 return java_thread->long_field(_park_event_offset);
1097 }
1098 return 0;
1099 }
1101 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1102 if (_park_event_offset > 0) {
1103 java_thread->long_field_put(_park_event_offset, ptr);
1104 return true;
1105 }
1106 return false;
1107 }
1110 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1111 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status");
1112 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1113 switch (status) {
1114 case NEW : return "NEW";
1115 case RUNNABLE : return "RUNNABLE";
1116 case SLEEPING : return "TIMED_WAITING (sleeping)";
1117 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1118 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1119 case PARKED : return "WAITING (parking)";
1120 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1121 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1122 case TERMINATED : return "TERMINATED";
1123 default : return "UNKNOWN";
1124 };
1125 }
1126 int java_lang_ThreadGroup::_parent_offset = 0;
1127 int java_lang_ThreadGroup::_name_offset = 0;
1128 int java_lang_ThreadGroup::_threads_offset = 0;
1129 int java_lang_ThreadGroup::_groups_offset = 0;
1130 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1131 int java_lang_ThreadGroup::_destroyed_offset = 0;
1132 int java_lang_ThreadGroup::_daemon_offset = 0;
1133 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
1134 int java_lang_ThreadGroup::_nthreads_offset = 0;
1135 int java_lang_ThreadGroup::_ngroups_offset = 0;
1137 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1138 assert(java_thread_group->is_oop(), "thread group must be oop");
1139 return java_thread_group->obj_field(_parent_offset);
1140 }
1142 // ("name as oop" accessor is not necessary)
1144 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
1145 oop name = java_thread_group->obj_field(_name_offset);
1146 // ThreadGroup.name can be null
1147 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
1148 }
1150 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1151 assert(java_thread_group->is_oop(), "thread group must be oop");
1152 return java_thread_group->int_field(_nthreads_offset);
1153 }
1155 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1156 oop threads = java_thread_group->obj_field(_threads_offset);
1157 assert(threads != NULL, "threadgroups should have threads");
1158 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1159 return objArrayOop(threads);
1160 }
1162 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1163 assert(java_thread_group->is_oop(), "thread group must be oop");
1164 return java_thread_group->int_field(_ngroups_offset);
1165 }
1167 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1168 oop groups = java_thread_group->obj_field(_groups_offset);
1169 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1170 return objArrayOop(groups);
1171 }
1173 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1174 assert(java_thread_group->is_oop(), "thread group must be oop");
1175 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1176 }
1178 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1179 assert(java_thread_group->is_oop(), "thread group must be oop");
1180 return java_thread_group->bool_field(_destroyed_offset) != 0;
1181 }
1183 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1184 assert(java_thread_group->is_oop(), "thread group must be oop");
1185 return java_thread_group->bool_field(_daemon_offset) != 0;
1186 }
1188 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1189 assert(java_thread_group->is_oop(), "thread group must be oop");
1190 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1191 }
1193 void java_lang_ThreadGroup::compute_offsets() {
1194 assert(_parent_offset == 0, "offsets should be initialized only once");
1196 Klass* k = SystemDictionary::ThreadGroup_klass();
1198 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1199 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1200 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1201 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1202 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1203 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1204 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1205 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1206 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1207 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1208 }
1210 oop java_lang_Throwable::unassigned_stacktrace() {
1211 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass());
1212 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1213 if (UseCompressedOops) {
1214 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1215 } else {
1216 return oopDesc::load_decode_heap_oop((oop*)addr);
1217 }
1218 }
1220 oop java_lang_Throwable::backtrace(oop throwable) {
1221 return throwable->obj_field_acquire(backtrace_offset);
1222 }
1225 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1226 throwable->release_obj_field_put(backtrace_offset, value);
1227 }
1230 oop java_lang_Throwable::message(oop throwable) {
1231 return throwable->obj_field(detailMessage_offset);
1232 }
1235 oop java_lang_Throwable::message(Handle throwable) {
1236 return throwable->obj_field(detailMessage_offset);
1237 }
1240 void java_lang_Throwable::set_message(oop throwable, oop value) {
1241 throwable->obj_field_put(detailMessage_offset, value);
1242 }
1245 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1246 throwable->obj_field_put(stackTrace_offset, st_element_array);
1247 }
1249 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1250 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1251 set_stacktrace(throwable, NULL);
1252 }
1255 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1256 ResourceMark rm;
1257 Klass* k = throwable->klass();
1258 assert(k != NULL, "just checking");
1259 st->print("%s", InstanceKlass::cast(k)->external_name());
1260 oop msg = message(throwable);
1261 if (msg != NULL) {
1262 st->print(": %s", java_lang_String::as_utf8_string(msg));
1263 }
1264 }
1267 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1268 ResourceMark rm;
1269 Klass* k = throwable->klass();
1270 assert(k != NULL, "just checking");
1271 st->print("%s", InstanceKlass::cast(k)->external_name());
1272 oop msg = message(throwable);
1273 if (msg != NULL) {
1274 st->print(": %s", java_lang_String::as_utf8_string(msg));
1275 }
1276 }
1278 // After this many redefines, the stack trace is unreliable.
1279 const int MAX_VERSION = USHRT_MAX;
1281 // Helper backtrace functions to store bci|version together.
1282 static inline int merge_bci_and_version(int bci, int version) {
1283 // only store u2 for version, checking for overflow.
1284 if (version > USHRT_MAX || version < 0) version = MAX_VERSION;
1285 assert((jushort)bci == bci, "bci should be short");
1286 return build_int_from_shorts(version, bci);
1287 }
1289 static inline int bci_at(unsigned int merged) {
1290 return extract_high_short_from_int(merged);
1291 }
1292 static inline int version_at(unsigned int merged) {
1293 return extract_low_short_from_int(merged);
1294 }
1296 static inline bool version_matches(Method* method, int version) {
1297 assert(version < MAX_VERSION, "version is too big");
1298 return method != NULL && (method->constants()->version() == version);
1299 }
1301 static inline int get_line_number(Method* method, int bci) {
1302 int line_number = 0;
1303 if (method->is_native()) {
1304 // Negative value different from -1 below, enabling Java code in
1305 // class java.lang.StackTraceElement to distinguish "native" from
1306 // "no LineNumberTable". JDK tests for -2.
1307 line_number = -2;
1308 } else {
1309 // Returns -1 if no LineNumberTable, and otherwise actual line number
1310 line_number = method->line_number_from_bci(bci);
1311 if (line_number == -1 && ShowHiddenFrames) {
1312 line_number = bci + 1000000;
1313 }
1314 }
1315 return line_number;
1316 }
1318 // This class provides a simple wrapper over the internal structure of
1319 // exception backtrace to insulate users of the backtrace from needing
1320 // to know what it looks like.
1321 class BacktraceBuilder: public StackObj {
1322 private:
1323 Handle _backtrace;
1324 objArrayOop _head;
1325 typeArrayOop _methods;
1326 typeArrayOop _bcis;
1327 objArrayOop _mirrors;
1328 typeArrayOop _cprefs; // needed to insulate method name against redefinition
1329 int _index;
1330 No_Safepoint_Verifier _nsv;
1332 public:
1334 enum {
1335 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1336 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1337 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1338 trace_cprefs_offset = java_lang_Throwable::trace_cprefs_offset,
1339 trace_next_offset = java_lang_Throwable::trace_next_offset,
1340 trace_size = java_lang_Throwable::trace_size,
1341 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1342 };
1344 // get info out of chunks
1345 static typeArrayOop get_methods(objArrayHandle chunk) {
1346 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1347 assert(methods != NULL, "method array should be initialized in backtrace");
1348 return methods;
1349 }
1350 static typeArrayOop get_bcis(objArrayHandle chunk) {
1351 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1352 assert(bcis != NULL, "bci array should be initialized in backtrace");
1353 return bcis;
1354 }
1355 static objArrayOop get_mirrors(objArrayHandle chunk) {
1356 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1357 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1358 return mirrors;
1359 }
1360 static typeArrayOop get_cprefs(objArrayHandle chunk) {
1361 typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset));
1362 assert(cprefs != NULL, "cprefs array should be initialized in backtrace");
1363 return cprefs;
1364 }
1366 // constructor for new backtrace
1367 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) {
1368 expand(CHECK);
1369 _backtrace = _head;
1370 _index = 0;
1371 }
1373 BacktraceBuilder(objArrayHandle backtrace) {
1374 _methods = get_methods(backtrace);
1375 _bcis = get_bcis(backtrace);
1376 _mirrors = get_mirrors(backtrace);
1377 _cprefs = get_cprefs(backtrace);
1378 assert(_methods->length() == _bcis->length() &&
1379 _methods->length() == _mirrors->length(),
1380 "method and source information arrays should match");
1382 // head is the preallocated backtrace
1383 _backtrace = _head = backtrace();
1384 _index = 0;
1385 }
1387 void expand(TRAPS) {
1388 objArrayHandle old_head(THREAD, _head);
1389 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1391 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1392 objArrayHandle new_head(THREAD, head);
1394 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1395 typeArrayHandle new_methods(THREAD, methods);
1397 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1398 typeArrayHandle new_bcis(THREAD, bcis);
1400 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1401 objArrayHandle new_mirrors(THREAD, mirrors);
1403 typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1404 typeArrayHandle new_cprefs(THREAD, cprefs);
1406 if (!old_head.is_null()) {
1407 old_head->obj_at_put(trace_next_offset, new_head());
1408 }
1409 new_head->obj_at_put(trace_methods_offset, new_methods());
1410 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1411 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1412 new_head->obj_at_put(trace_cprefs_offset, new_cprefs());
1414 _head = new_head();
1415 _methods = new_methods();
1416 _bcis = new_bcis();
1417 _mirrors = new_mirrors();
1418 _cprefs = new_cprefs();
1419 _index = 0;
1420 }
1422 oop backtrace() {
1423 return _backtrace();
1424 }
1426 inline void push(Method* method, int bci, TRAPS) {
1427 // Smear the -1 bci to 0 since the array only holds unsigned
1428 // shorts. The later line number lookup would just smear the -1
1429 // to a 0 even if it could be recorded.
1430 if (bci == SynchronizationEntryBCI) bci = 0;
1432 if (_index >= trace_chunk_size) {
1433 methodHandle mhandle(THREAD, method);
1434 expand(CHECK);
1435 method = mhandle();
1436 }
1438 _methods->short_at_put(_index, method->orig_method_idnum());
1439 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version()));
1440 _cprefs->short_at_put(_index, method->name_index());
1442 // We need to save the mirrors in the backtrace to keep the class
1443 // from being unloaded while we still have this stack trace.
1444 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1445 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1446 _index++;
1447 }
1449 };
1451 // Print stack trace element to resource allocated buffer
1452 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
1453 int method_id, int version, int bci, int cpref) {
1455 // Get strings and string lengths
1456 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1457 const char* klass_name = holder->external_name();
1458 int buf_len = (int)strlen(klass_name);
1460 Method* method = holder->method_with_orig_idnum(method_id, version);
1462 // The method can be NULL if the requested class version is gone
1463 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1464 char* method_name = sym->as_C_string();
1465 buf_len += (int)strlen(method_name);
1467 // Use a specific ik version as a holder since the mirror might
1468 // refer to a version that is now obsolete and no longer accessible
1469 // via the previous versions list.
1470 holder = holder->get_klass_version(version);
1471 char* source_file_name = NULL;
1472 if (holder != NULL) {
1473 Symbol* source = holder->source_file_name();
1474 if (source != NULL) {
1475 source_file_name = source->as_C_string();
1476 buf_len += (int)strlen(source_file_name);
1477 }
1478 }
1480 // Allocate temporary buffer with extra space for formatting and line number
1481 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1483 // Print stack trace line in buffer
1484 sprintf(buf, "\tat %s.%s", klass_name, method_name);
1486 if (!version_matches(method, version)) {
1487 strcat(buf, "(Redefined)");
1488 } else {
1489 int line_number = get_line_number(method, bci);
1490 if (line_number == -2) {
1491 strcat(buf, "(Native Method)");
1492 } else {
1493 if (source_file_name != NULL && (line_number != -1)) {
1494 // Sourcename and linenumber
1495 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1496 } else if (source_file_name != NULL) {
1497 // Just sourcename
1498 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1499 } else {
1500 // Neither sourcename nor linenumber
1501 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1502 }
1503 nmethod* nm = method->code();
1504 if (WizardMode && nm != NULL) {
1505 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1506 }
1507 }
1508 }
1510 return buf;
1511 }
1513 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror,
1514 int method_id, int version, int bci, int cpref) {
1515 ResourceMark rm;
1516 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci, cpref);
1517 st->print_cr("%s", buf);
1518 }
1520 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) {
1521 Handle mirror = method->method_holder()->java_mirror();
1522 int method_id = method->orig_method_idnum();
1523 int version = method->constants()->version();
1524 int cpref = method->name_index();
1525 print_stack_element(st, mirror, method_id, version, bci, cpref);
1526 }
1528 const char* java_lang_Throwable::no_stack_trace_message() {
1529 return "\t<<no stack trace available>>";
1530 }
1533 // Currently used only for exceptions occurring during startup
1534 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1535 Thread *THREAD = Thread::current();
1536 Handle h_throwable(THREAD, throwable);
1537 while (h_throwable.not_null()) {
1538 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1539 if (result.is_null()) {
1540 st->print_cr("%s", no_stack_trace_message());
1541 return;
1542 }
1544 while (result.not_null()) {
1546 // Get method id, bci, version and mirror from chunk
1547 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result));
1548 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result));
1549 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result));
1550 typeArrayHandle cprefs (THREAD, BacktraceBuilder::get_cprefs(result));
1552 int length = methods()->length();
1553 for (int index = 0; index < length; index++) {
1554 Handle mirror(THREAD, mirrors->obj_at(index));
1555 // NULL mirror means end of stack trace
1556 if (mirror.is_null()) goto handle_cause;
1557 int method = methods->short_at(index);
1558 int version = version_at(bcis->int_at(index));
1559 int bci = bci_at(bcis->int_at(index));
1560 int cpref = cprefs->short_at(index);
1561 print_stack_element(st, mirror, method, version, bci, cpref);
1562 }
1563 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1564 }
1565 handle_cause:
1566 {
1567 EXCEPTION_MARK;
1568 JavaValue cause(T_OBJECT);
1569 JavaCalls::call_virtual(&cause,
1570 h_throwable,
1571 KlassHandle(THREAD, h_throwable->klass()),
1572 vmSymbols::getCause_name(),
1573 vmSymbols::void_throwable_signature(),
1574 THREAD);
1575 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1576 if (HAS_PENDING_EXCEPTION) {
1577 CLEAR_PENDING_EXCEPTION;
1578 h_throwable = Handle();
1579 } else {
1580 h_throwable = Handle(THREAD, (oop) cause.get_jobject());
1581 if (h_throwable.not_null()) {
1582 st->print("Caused by: ");
1583 print(h_throwable, st);
1584 st->cr();
1585 }
1586 }
1587 }
1588 }
1589 }
1591 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) {
1592 if (!StackTraceInThrowable) return;
1593 ResourceMark rm(THREAD);
1595 // Start out by clearing the backtrace for this object, in case the VM
1596 // runs out of memory while allocating the stack trace
1597 set_backtrace(throwable(), NULL);
1598 if (JDK_Version::is_gte_jdk14x_version()) {
1599 // New since 1.4, clear lazily constructed Java level stacktrace if
1600 // refilling occurs
1601 // This is unnecessary in 1.7+ but harmless
1602 clear_stacktrace(throwable());
1603 }
1605 int max_depth = MaxJavaStackTraceDepth;
1606 JavaThread* thread = (JavaThread*)THREAD;
1607 BacktraceBuilder bt(CHECK);
1609 // If there is no Java frame just return the method that was being called
1610 // with bci 0
1611 if (!thread->has_last_Java_frame()) {
1612 if (max_depth >= 1 && method() != NULL) {
1613 bt.push(method(), 0, CHECK);
1614 set_backtrace(throwable(), bt.backtrace());
1615 }
1616 return;
1617 }
1619 // Instead of using vframe directly, this version of fill_in_stack_trace
1620 // basically handles everything by hand. This significantly improved the
1621 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1622 // See bug 6333838 for more details.
1623 // The "ASSERT" here is to verify this method generates the exactly same stack
1624 // trace as utilizing vframe.
1625 #ifdef ASSERT
1626 vframeStream st(thread);
1627 methodHandle st_method(THREAD, st.method());
1628 #endif
1629 int total_count = 0;
1630 RegisterMap map(thread, false);
1631 int decode_offset = 0;
1632 nmethod* nm = NULL;
1633 bool skip_fillInStackTrace_check = false;
1634 bool skip_throwableInit_check = false;
1635 bool skip_hidden = !ShowHiddenFrames;
1637 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1638 Method* method = NULL;
1639 int bci = 0;
1641 // Compiled java method case.
1642 if (decode_offset != 0) {
1643 DebugInfoReadStream stream(nm, decode_offset);
1644 decode_offset = stream.read_int();
1645 method = (Method*)nm->metadata_at(stream.read_int());
1646 bci = stream.read_bci();
1647 } else {
1648 if (fr.is_first_frame()) break;
1649 address pc = fr.pc();
1650 if (fr.is_interpreted_frame()) {
1651 intptr_t bcx = fr.interpreter_frame_bcx();
1652 method = fr.interpreter_frame_method();
1653 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
1654 fr = fr.sender(&map);
1655 } else {
1656 CodeBlob* cb = fr.cb();
1657 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1658 // but non nmethod
1659 fr = fr.sender(&map);
1660 if (cb == NULL || !cb->is_nmethod()) {
1661 continue;
1662 }
1663 nm = (nmethod*)cb;
1664 if (nm->method()->is_native()) {
1665 method = nm->method();
1666 bci = 0;
1667 } else {
1668 PcDesc* pd = nm->pc_desc_at(pc);
1669 decode_offset = pd->scope_decode_offset();
1670 // if decode_offset is not equal to 0, it will execute the
1671 // "compiled java method case" at the beginning of the loop.
1672 continue;
1673 }
1674 }
1675 }
1676 #ifdef ASSERT
1677 assert(st_method() == method && st.bci() == bci,
1678 "Wrong stack trace");
1679 st.next();
1680 // vframeStream::method isn't GC-safe so store off a copy
1681 // of the Method* in case we GC.
1682 if (!st.at_end()) {
1683 st_method = st.method();
1684 }
1685 #endif
1687 // the format of the stacktrace will be:
1688 // - 1 or more fillInStackTrace frames for the exception class (skipped)
1689 // - 0 or more <init> methods for the exception class (skipped)
1690 // - rest of the stack
1692 if (!skip_fillInStackTrace_check) {
1693 if ((method->name() == vmSymbols::fillInStackTrace_name() ||
1694 method->name() == vmSymbols::fillInStackTrace0_name()) &&
1695 throwable->is_a(method->method_holder())) {
1696 continue;
1697 }
1698 else {
1699 skip_fillInStackTrace_check = true; // gone past them all
1700 }
1701 }
1702 if (!skip_throwableInit_check) {
1703 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1705 // skip <init> methods of the exception class and superclasses
1706 // This is simlar to classic VM.
1707 if (method->name() == vmSymbols::object_initializer_name() &&
1708 throwable->is_a(method->method_holder())) {
1709 continue;
1710 } else {
1711 // there are none or we've seen them all - either way stop checking
1712 skip_throwableInit_check = true;
1713 }
1714 }
1715 if (method->is_hidden()) {
1716 if (skip_hidden) continue;
1717 }
1718 bt.push(method, bci, CHECK);
1719 total_count++;
1720 }
1722 // Put completed stack trace into throwable object
1723 set_backtrace(throwable(), bt.backtrace());
1724 }
1726 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) {
1727 // No-op if stack trace is disabled
1728 if (!StackTraceInThrowable) {
1729 return;
1730 }
1732 // Disable stack traces for some preallocated out of memory errors
1733 if (!Universe::should_fill_in_stack_trace(throwable)) {
1734 return;
1735 }
1737 PRESERVE_EXCEPTION_MARK;
1739 JavaThread* thread = JavaThread::active();
1740 fill_in_stack_trace(throwable, method, thread);
1741 // ignore exceptions thrown during stack trace filling
1742 CLEAR_PENDING_EXCEPTION;
1743 }
1745 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1746 // Allocate stack trace - backtrace is created but not filled in
1748 // No-op if stack trace is disabled
1749 if (!StackTraceInThrowable) return;
1750 BacktraceBuilder bt(CHECK); // creates a backtrace
1751 set_backtrace(throwable(), bt.backtrace());
1752 }
1755 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1756 // Fill in stack trace into preallocated backtrace (no GC)
1758 // No-op if stack trace is disabled
1759 if (!StackTraceInThrowable) return;
1761 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1763 JavaThread* THREAD = JavaThread::current();
1765 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
1766 assert(backtrace.not_null(), "backtrace should have been preallocated");
1768 ResourceMark rm(THREAD);
1769 vframeStream st(THREAD);
1771 BacktraceBuilder bt(backtrace);
1773 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1774 // methods as preallocated errors aren't created by "java" code.
1776 // fill in as much stack trace as possible
1777 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace);
1778 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1779 int chunk_count = 0;
1781 for (;!st.at_end(); st.next()) {
1782 bt.push(st.method(), st.bci(), CHECK);
1783 chunk_count++;
1785 // Bail-out for deep stacks
1786 if (chunk_count >= max_chunks) break;
1787 }
1789 // For Java 7+ we support the Throwable immutability protocol defined for Java 7. This support
1790 // was missing in 7u0 so in 7u0 there is a workaround in the Throwable class. That workaround
1791 // can be removed in a JDK using this JVM version
1792 if (JDK_Version::is_gte_jdk17x_version()) {
1793 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
1794 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
1795 }
1796 }
1799 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1800 if (throwable == NULL) {
1801 THROW_0(vmSymbols::java_lang_NullPointerException());
1802 }
1803 objArrayOop chunk = objArrayOop(backtrace(throwable));
1804 int depth = 0;
1805 if (chunk != NULL) {
1806 // Iterate over chunks and count full ones
1807 while (true) {
1808 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1809 if (next == NULL) break;
1810 depth += trace_chunk_size;
1811 chunk = next;
1812 }
1813 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1814 // Count element in remaining partial chunk. NULL value for mirror
1815 // marks the end of the stack trace elements that are saved.
1816 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1817 assert(mirrors != NULL, "sanity check");
1818 for (int i = 0; i < mirrors->length(); i++) {
1819 if (mirrors->obj_at(i) == NULL) break;
1820 depth++;
1821 }
1822 }
1823 return depth;
1824 }
1827 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1828 if (throwable == NULL) {
1829 THROW_0(vmSymbols::java_lang_NullPointerException());
1830 }
1831 if (index < 0) {
1832 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1833 }
1834 // Compute how many chunks to skip and index into actual chunk
1835 objArrayOop chunk = objArrayOop(backtrace(throwable));
1836 int skip_chunks = index / trace_chunk_size;
1837 int chunk_index = index % trace_chunk_size;
1838 while (chunk != NULL && skip_chunks > 0) {
1839 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1840 skip_chunks--;
1841 }
1842 if (chunk == NULL) {
1843 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1844 }
1845 // Get method id, bci, version, mirror and cpref from chunk
1846 typeArrayOop methods = BacktraceBuilder::get_methods(chunk);
1847 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk);
1848 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1849 typeArrayOop cprefs = BacktraceBuilder::get_cprefs(chunk);
1851 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check");
1853 int method = methods->short_at(chunk_index);
1854 int version = version_at(bcis->int_at(chunk_index));
1855 int bci = bci_at(bcis->int_at(chunk_index));
1856 int cpref = cprefs->short_at(chunk_index);
1857 Handle mirror(THREAD, mirrors->obj_at(chunk_index));
1859 // Chunk can be partial full
1860 if (mirror.is_null()) {
1861 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1862 }
1863 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, cpref, CHECK_0);
1864 return element;
1865 }
1867 oop java_lang_StackTraceElement::create(Handle mirror, int method_id,
1868 int version, int bci, int cpref, TRAPS) {
1869 // Allocate java.lang.StackTraceElement instance
1870 Klass* k = SystemDictionary::StackTraceElement_klass();
1871 assert(k != NULL, "must be loaded in 1.4+");
1872 instanceKlassHandle ik (THREAD, k);
1873 if (ik->should_be_initialized()) {
1874 ik->initialize(CHECK_0);
1875 }
1877 Handle element = ik->allocate_instance_handle(CHECK_0);
1878 // Fill in class name
1879 ResourceMark rm(THREAD);
1880 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1881 const char* str = holder->external_name();
1882 oop classname = StringTable::intern((char*) str, CHECK_0);
1883 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1885 Method* method = holder->method_with_orig_idnum(method_id, version);
1887 // The method can be NULL if the requested class version is gone
1888 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1890 // Fill in method name
1891 oop methodname = StringTable::intern(sym, CHECK_0);
1892 java_lang_StackTraceElement::set_methodName(element(), methodname);
1894 if (!version_matches(method, version)) {
1895 // The method was redefined, accurate line number information isn't available
1896 java_lang_StackTraceElement::set_fileName(element(), NULL);
1897 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1898 } else {
1899 // Fill in source file name and line number.
1900 // Use a specific ik version as a holder since the mirror might
1901 // refer to a version that is now obsolete and no longer accessible
1902 // via the previous versions list.
1903 holder = holder->get_klass_version(version);
1904 assert(holder != NULL, "sanity check");
1905 Symbol* source = holder->source_file_name();
1906 if (ShowHiddenFrames && source == NULL)
1907 source = vmSymbols::unknown_class_name();
1908 oop filename = StringTable::intern(source, CHECK_0);
1909 java_lang_StackTraceElement::set_fileName(element(), filename);
1911 int line_number = get_line_number(method, bci);
1912 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1913 }
1914 return element();
1915 }
1917 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1918 Handle mirror (THREAD, method->method_holder()->java_mirror());
1919 int method_id = method->orig_method_idnum();
1920 int cpref = method->name_index();
1921 return create(mirror, method_id, method->constants()->version(), bci, cpref, THREAD);
1922 }
1924 void java_lang_reflect_AccessibleObject::compute_offsets() {
1925 Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
1926 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1927 }
1929 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1930 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1931 return (jboolean) reflect->bool_field(override_offset);
1932 }
1934 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1935 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1936 reflect->bool_field_put(override_offset, (int) value);
1937 }
1939 void java_lang_reflect_Method::compute_offsets() {
1940 Klass* k = SystemDictionary::reflect_Method_klass();
1941 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1942 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1943 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1944 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1945 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1946 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1947 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1948 // The generic signature and annotations fields are only present in 1.5
1949 signature_offset = -1;
1950 annotations_offset = -1;
1951 parameter_annotations_offset = -1;
1952 annotation_default_offset = -1;
1953 type_annotations_offset = -1;
1954 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1955 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1956 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1957 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1958 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
1959 }
1961 Handle java_lang_reflect_Method::create(TRAPS) {
1962 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1963 Klass* klass = SystemDictionary::reflect_Method_klass();
1964 // This class is eagerly initialized during VM initialization, since we keep a refence
1965 // to one of the methods
1966 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
1967 return InstanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH);
1968 }
1970 oop java_lang_reflect_Method::clazz(oop reflect) {
1971 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1972 return reflect->obj_field(clazz_offset);
1973 }
1975 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1976 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1977 reflect->obj_field_put(clazz_offset, value);
1978 }
1980 int java_lang_reflect_Method::slot(oop reflect) {
1981 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1982 return reflect->int_field(slot_offset);
1983 }
1985 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1986 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1987 reflect->int_field_put(slot_offset, value);
1988 }
1990 oop java_lang_reflect_Method::name(oop method) {
1991 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1992 return method->obj_field(name_offset);
1993 }
1995 void java_lang_reflect_Method::set_name(oop method, oop value) {
1996 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1997 method->obj_field_put(name_offset, value);
1998 }
2000 oop java_lang_reflect_Method::return_type(oop method) {
2001 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2002 return method->obj_field(returnType_offset);
2003 }
2005 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2006 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2007 method->obj_field_put(returnType_offset, value);
2008 }
2010 oop java_lang_reflect_Method::parameter_types(oop method) {
2011 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2012 return method->obj_field(parameterTypes_offset);
2013 }
2015 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2016 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2017 method->obj_field_put(parameterTypes_offset, value);
2018 }
2020 oop java_lang_reflect_Method::exception_types(oop method) {
2021 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2022 return method->obj_field(exceptionTypes_offset);
2023 }
2025 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2026 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2027 method->obj_field_put(exceptionTypes_offset, value);
2028 }
2030 int java_lang_reflect_Method::modifiers(oop method) {
2031 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2032 return method->int_field(modifiers_offset);
2033 }
2035 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2036 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2037 method->int_field_put(modifiers_offset, value);
2038 }
2040 bool java_lang_reflect_Method::has_signature_field() {
2041 return (signature_offset >= 0);
2042 }
2044 oop java_lang_reflect_Method::signature(oop method) {
2045 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2046 assert(has_signature_field(), "signature field must be present");
2047 return method->obj_field(signature_offset);
2048 }
2050 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2051 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2052 assert(has_signature_field(), "signature field must be present");
2053 method->obj_field_put(signature_offset, value);
2054 }
2056 bool java_lang_reflect_Method::has_annotations_field() {
2057 return (annotations_offset >= 0);
2058 }
2060 oop java_lang_reflect_Method::annotations(oop method) {
2061 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2062 assert(has_annotations_field(), "annotations field must be present");
2063 return method->obj_field(annotations_offset);
2064 }
2066 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2067 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2068 assert(has_annotations_field(), "annotations field must be present");
2069 method->obj_field_put(annotations_offset, value);
2070 }
2072 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2073 return (parameter_annotations_offset >= 0);
2074 }
2076 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2077 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2078 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2079 return method->obj_field(parameter_annotations_offset);
2080 }
2082 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2083 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2084 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2085 method->obj_field_put(parameter_annotations_offset, value);
2086 }
2088 bool java_lang_reflect_Method::has_annotation_default_field() {
2089 return (annotation_default_offset >= 0);
2090 }
2092 oop java_lang_reflect_Method::annotation_default(oop method) {
2093 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2094 assert(has_annotation_default_field(), "annotation default field must be present");
2095 return method->obj_field(annotation_default_offset);
2096 }
2098 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2099 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2100 assert(has_annotation_default_field(), "annotation default field must be present");
2101 method->obj_field_put(annotation_default_offset, value);
2102 }
2104 bool java_lang_reflect_Method::has_type_annotations_field() {
2105 return (type_annotations_offset >= 0);
2106 }
2108 oop java_lang_reflect_Method::type_annotations(oop method) {
2109 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2110 assert(has_type_annotations_field(), "type_annotations field must be present");
2111 return method->obj_field(type_annotations_offset);
2112 }
2114 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2115 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2116 assert(has_type_annotations_field(), "type_annotations field must be present");
2117 method->obj_field_put(type_annotations_offset, value);
2118 }
2120 void java_lang_reflect_Constructor::compute_offsets() {
2121 Klass* k = SystemDictionary::reflect_Constructor_klass();
2122 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2123 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2124 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2125 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2126 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2127 // The generic signature and annotations fields are only present in 1.5
2128 signature_offset = -1;
2129 annotations_offset = -1;
2130 parameter_annotations_offset = -1;
2131 type_annotations_offset = -1;
2132 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2133 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2134 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2135 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2136 }
2138 Handle java_lang_reflect_Constructor::create(TRAPS) {
2139 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2140 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2141 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2142 instanceKlassHandle klass (THREAD, k);
2143 // Ensure it is initialized
2144 klass->initialize(CHECK_NH);
2145 return klass->allocate_instance_handle(CHECK_NH);
2146 }
2148 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2149 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2150 return reflect->obj_field(clazz_offset);
2151 }
2153 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2154 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2155 reflect->obj_field_put(clazz_offset, value);
2156 }
2158 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2159 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2160 return constructor->obj_field(parameterTypes_offset);
2161 }
2163 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2164 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2165 constructor->obj_field_put(parameterTypes_offset, value);
2166 }
2168 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2169 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2170 return constructor->obj_field(exceptionTypes_offset);
2171 }
2173 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2174 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2175 constructor->obj_field_put(exceptionTypes_offset, value);
2176 }
2178 int java_lang_reflect_Constructor::slot(oop reflect) {
2179 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2180 return reflect->int_field(slot_offset);
2181 }
2183 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2184 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2185 reflect->int_field_put(slot_offset, value);
2186 }
2188 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2189 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2190 return constructor->int_field(modifiers_offset);
2191 }
2193 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2194 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2195 constructor->int_field_put(modifiers_offset, value);
2196 }
2198 bool java_lang_reflect_Constructor::has_signature_field() {
2199 return (signature_offset >= 0);
2200 }
2202 oop java_lang_reflect_Constructor::signature(oop constructor) {
2203 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2204 assert(has_signature_field(), "signature field must be present");
2205 return constructor->obj_field(signature_offset);
2206 }
2208 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2209 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2210 assert(has_signature_field(), "signature field must be present");
2211 constructor->obj_field_put(signature_offset, value);
2212 }
2214 bool java_lang_reflect_Constructor::has_annotations_field() {
2215 return (annotations_offset >= 0);
2216 }
2218 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2219 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2220 assert(has_annotations_field(), "annotations field must be present");
2221 return constructor->obj_field(annotations_offset);
2222 }
2224 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2225 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2226 assert(has_annotations_field(), "annotations field must be present");
2227 constructor->obj_field_put(annotations_offset, value);
2228 }
2230 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2231 return (parameter_annotations_offset >= 0);
2232 }
2234 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2235 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2236 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2237 return method->obj_field(parameter_annotations_offset);
2238 }
2240 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2241 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2242 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2243 method->obj_field_put(parameter_annotations_offset, value);
2244 }
2246 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2247 return (type_annotations_offset >= 0);
2248 }
2250 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2251 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2252 assert(has_type_annotations_field(), "type_annotations field must be present");
2253 return constructor->obj_field(type_annotations_offset);
2254 }
2256 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2257 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2258 assert(has_type_annotations_field(), "type_annotations field must be present");
2259 constructor->obj_field_put(type_annotations_offset, value);
2260 }
2262 void java_lang_reflect_Field::compute_offsets() {
2263 Klass* k = SystemDictionary::reflect_Field_klass();
2264 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2265 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2266 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
2267 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2268 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2269 // The generic signature and annotations fields are only present in 1.5
2270 signature_offset = -1;
2271 annotations_offset = -1;
2272 type_annotations_offset = -1;
2273 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2274 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2275 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2276 }
2278 Handle java_lang_reflect_Field::create(TRAPS) {
2279 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2280 Symbol* name = vmSymbols::java_lang_reflect_Field();
2281 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2282 instanceKlassHandle klass (THREAD, k);
2283 // Ensure it is initialized
2284 klass->initialize(CHECK_NH);
2285 return klass->allocate_instance_handle(CHECK_NH);
2286 }
2288 oop java_lang_reflect_Field::clazz(oop reflect) {
2289 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2290 return reflect->obj_field(clazz_offset);
2291 }
2293 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2294 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2295 reflect->obj_field_put(clazz_offset, value);
2296 }
2298 oop java_lang_reflect_Field::name(oop field) {
2299 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2300 return field->obj_field(name_offset);
2301 }
2303 void java_lang_reflect_Field::set_name(oop field, oop value) {
2304 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2305 field->obj_field_put(name_offset, value);
2306 }
2308 oop java_lang_reflect_Field::type(oop field) {
2309 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2310 return field->obj_field(type_offset);
2311 }
2313 void java_lang_reflect_Field::set_type(oop field, oop value) {
2314 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2315 field->obj_field_put(type_offset, value);
2316 }
2318 int java_lang_reflect_Field::slot(oop reflect) {
2319 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2320 return reflect->int_field(slot_offset);
2321 }
2323 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2324 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2325 reflect->int_field_put(slot_offset, value);
2326 }
2328 int java_lang_reflect_Field::modifiers(oop field) {
2329 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2330 return field->int_field(modifiers_offset);
2331 }
2333 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2334 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2335 field->int_field_put(modifiers_offset, value);
2336 }
2338 bool java_lang_reflect_Field::has_signature_field() {
2339 return (signature_offset >= 0);
2340 }
2342 oop java_lang_reflect_Field::signature(oop field) {
2343 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2344 assert(has_signature_field(), "signature field must be present");
2345 return field->obj_field(signature_offset);
2346 }
2348 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2349 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2350 assert(has_signature_field(), "signature field must be present");
2351 field->obj_field_put(signature_offset, value);
2352 }
2354 bool java_lang_reflect_Field::has_annotations_field() {
2355 return (annotations_offset >= 0);
2356 }
2358 oop java_lang_reflect_Field::annotations(oop field) {
2359 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2360 assert(has_annotations_field(), "annotations field must be present");
2361 return field->obj_field(annotations_offset);
2362 }
2364 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2365 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2366 assert(has_annotations_field(), "annotations field must be present");
2367 field->obj_field_put(annotations_offset, value);
2368 }
2370 bool java_lang_reflect_Field::has_type_annotations_field() {
2371 return (type_annotations_offset >= 0);
2372 }
2374 oop java_lang_reflect_Field::type_annotations(oop field) {
2375 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2376 assert(has_type_annotations_field(), "type_annotations field must be present");
2377 return field->obj_field(type_annotations_offset);
2378 }
2380 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2381 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2382 assert(has_type_annotations_field(), "type_annotations field must be present");
2383 field->obj_field_put(type_annotations_offset, value);
2384 }
2386 void sun_reflect_ConstantPool::compute_offsets() {
2387 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2388 // This null test can be removed post beta
2389 if (k != NULL) {
2390 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2391 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2392 }
2393 }
2395 void java_lang_reflect_Parameter::compute_offsets() {
2396 Klass* k = SystemDictionary::reflect_Parameter_klass();
2397 if(NULL != k) {
2398 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2399 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2400 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature());
2401 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature());
2402 }
2403 }
2405 Handle java_lang_reflect_Parameter::create(TRAPS) {
2406 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2407 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2408 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2409 instanceKlassHandle klass (THREAD, k);
2410 // Ensure it is initialized
2411 klass->initialize(CHECK_NH);
2412 return klass->allocate_instance_handle(CHECK_NH);
2413 }
2415 oop java_lang_reflect_Parameter::name(oop param) {
2416 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2417 return param->obj_field(name_offset);
2418 }
2420 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2421 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2422 param->obj_field_put(name_offset, value);
2423 }
2425 int java_lang_reflect_Parameter::modifiers(oop param) {
2426 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2427 return param->int_field(modifiers_offset);
2428 }
2430 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2431 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2432 param->int_field_put(modifiers_offset, value);
2433 }
2435 int java_lang_reflect_Parameter::index(oop param) {
2436 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2437 return param->int_field(index_offset);
2438 }
2440 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2441 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2442 param->int_field_put(index_offset, value);
2443 }
2445 oop java_lang_reflect_Parameter::executable(oop param) {
2446 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2447 return param->obj_field(executable_offset);
2448 }
2450 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2451 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2452 param->obj_field_put(executable_offset, value);
2453 }
2456 Handle sun_reflect_ConstantPool::create(TRAPS) {
2457 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2458 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2459 instanceKlassHandle klass (THREAD, k);
2460 // Ensure it is initialized
2461 klass->initialize(CHECK_NH);
2462 return klass->allocate_instance_handle(CHECK_NH);
2463 }
2466 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2467 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2468 oop mirror = value->pool_holder()->java_mirror();
2469 // Save the mirror to get back the constant pool.
2470 reflect->obj_field_put(_oop_offset, mirror);
2471 }
2473 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) {
2474 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2476 oop mirror = reflect->obj_field(_oop_offset);
2477 Klass* k = java_lang_Class::as_Klass(mirror);
2478 assert(k->oop_is_instance(), "Must be");
2480 // Get the constant pool back from the klass. Since class redefinition
2481 // merges the new constant pool into the old, this is essentially the
2482 // same constant pool as the original. If constant pool merging is
2483 // no longer done in the future, this will have to change to save
2484 // the original.
2485 return InstanceKlass::cast(k)->constants();
2486 }
2488 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2489 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2490 // This null test can be removed post beta
2491 if (k != NULL) {
2492 compute_offset(_base_offset, k,
2493 vmSymbols::base_name(), vmSymbols::object_signature());
2494 }
2495 }
2497 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2498 Klass* k = SystemDictionary::box_klass(type);
2499 if (k == NULL) return NULL;
2500 instanceKlassHandle h (THREAD, k);
2501 if (!h->is_initialized()) h->initialize(CHECK_0);
2502 return h->allocate_instance(THREAD);
2503 }
2506 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2507 oop box = initialize_and_allocate(type, CHECK_0);
2508 if (box == NULL) return NULL;
2509 switch (type) {
2510 case T_BOOLEAN:
2511 box->bool_field_put(value_offset, value->z);
2512 break;
2513 case T_CHAR:
2514 box->char_field_put(value_offset, value->c);
2515 break;
2516 case T_FLOAT:
2517 box->float_field_put(value_offset, value->f);
2518 break;
2519 case T_DOUBLE:
2520 box->double_field_put(long_value_offset, value->d);
2521 break;
2522 case T_BYTE:
2523 box->byte_field_put(value_offset, value->b);
2524 break;
2525 case T_SHORT:
2526 box->short_field_put(value_offset, value->s);
2527 break;
2528 case T_INT:
2529 box->int_field_put(value_offset, value->i);
2530 break;
2531 case T_LONG:
2532 box->long_field_put(long_value_offset, value->j);
2533 break;
2534 default:
2535 return NULL;
2536 }
2537 return box;
2538 }
2541 BasicType java_lang_boxing_object::basic_type(oop box) {
2542 if (box == NULL) return T_ILLEGAL;
2543 BasicType type = SystemDictionary::box_klass_type(box->klass());
2544 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2545 return T_ILLEGAL;
2546 return type;
2547 }
2550 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2551 BasicType type = SystemDictionary::box_klass_type(box->klass());
2552 switch (type) {
2553 case T_BOOLEAN:
2554 value->z = box->bool_field(value_offset);
2555 break;
2556 case T_CHAR:
2557 value->c = box->char_field(value_offset);
2558 break;
2559 case T_FLOAT:
2560 value->f = box->float_field(value_offset);
2561 break;
2562 case T_DOUBLE:
2563 value->d = box->double_field(long_value_offset);
2564 break;
2565 case T_BYTE:
2566 value->b = box->byte_field(value_offset);
2567 break;
2568 case T_SHORT:
2569 value->s = box->short_field(value_offset);
2570 break;
2571 case T_INT:
2572 value->i = box->int_field(value_offset);
2573 break;
2574 case T_LONG:
2575 value->j = box->long_field(long_value_offset);
2576 break;
2577 default:
2578 return T_ILLEGAL;
2579 } // end switch
2580 return type;
2581 }
2584 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2585 BasicType type = SystemDictionary::box_klass_type(box->klass());
2586 switch (type) {
2587 case T_BOOLEAN:
2588 box->bool_field_put(value_offset, value->z);
2589 break;
2590 case T_CHAR:
2591 box->char_field_put(value_offset, value->c);
2592 break;
2593 case T_FLOAT:
2594 box->float_field_put(value_offset, value->f);
2595 break;
2596 case T_DOUBLE:
2597 box->double_field_put(long_value_offset, value->d);
2598 break;
2599 case T_BYTE:
2600 box->byte_field_put(value_offset, value->b);
2601 break;
2602 case T_SHORT:
2603 box->short_field_put(value_offset, value->s);
2604 break;
2605 case T_INT:
2606 box->int_field_put(value_offset, value->i);
2607 break;
2608 case T_LONG:
2609 box->long_field_put(long_value_offset, value->j);
2610 break;
2611 default:
2612 return T_ILLEGAL;
2613 } // end switch
2614 return type;
2615 }
2618 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2619 switch (type) {
2620 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2621 case T_CHAR: st->print("%d", value->c); break;
2622 case T_BYTE: st->print("%d", value->b); break;
2623 case T_SHORT: st->print("%d", value->s); break;
2624 case T_INT: st->print("%d", value->i); break;
2625 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2626 case T_FLOAT: st->print("%f", value->f); break;
2627 case T_DOUBLE: st->print("%lf", value->d); break;
2628 default: st->print("type %d?", type); break;
2629 }
2630 }
2633 // Support for java_lang_ref_Reference
2634 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() {
2635 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2636 address addr = ik->static_field_addr(static_lock_offset);
2637 return (HeapWord*) addr;
2638 }
2640 oop java_lang_ref_Reference::pending_list_lock() {
2641 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2642 address addr = ik->static_field_addr(static_lock_offset);
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 }
2650 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2651 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2652 address addr = ik->static_field_addr(static_pending_offset);
2653 // XXX This might not be HeapWord aligned, almost rather be char *.
2654 return (HeapWord*)addr;
2655 }
2657 oop java_lang_ref_Reference::pending_list() {
2658 char *addr = (char *)pending_list_addr();
2659 if (UseCompressedOops) {
2660 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2661 } else {
2662 return oopDesc::load_decode_heap_oop((oop*)addr);
2663 }
2664 }
2667 // Support for java_lang_ref_SoftReference
2669 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2670 return ref->long_field(timestamp_offset);
2671 }
2673 jlong java_lang_ref_SoftReference::clock() {
2674 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2675 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2676 return *offset;
2677 }
2679 void java_lang_ref_SoftReference::set_clock(jlong value) {
2680 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2681 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2682 *offset = value;
2683 }
2685 // Support for java_lang_invoke_DirectMethodHandle
2687 int java_lang_invoke_DirectMethodHandle::_member_offset;
2689 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
2690 oop member_name = NULL;
2691 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
2692 assert(is_dmh, "a DirectMethodHandle oop is expected");
2693 if (is_dmh) {
2694 member_name = dmh->obj_field(member_offset_in_bytes());
2695 }
2696 return member_name;
2697 }
2699 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
2700 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
2701 if (klass_oop != NULL && EnableInvokeDynamic) {
2702 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2703 }
2704 }
2706 // Support for java_lang_invoke_MethodHandle
2708 int java_lang_invoke_MethodHandle::_type_offset;
2709 int java_lang_invoke_MethodHandle::_form_offset;
2711 int java_lang_invoke_MemberName::_clazz_offset;
2712 int java_lang_invoke_MemberName::_name_offset;
2713 int java_lang_invoke_MemberName::_type_offset;
2714 int java_lang_invoke_MemberName::_flags_offset;
2715 int java_lang_invoke_MemberName::_vmtarget_offset;
2716 int java_lang_invoke_MemberName::_vmloader_offset;
2717 int java_lang_invoke_MemberName::_vmindex_offset;
2719 int java_lang_invoke_LambdaForm::_vmentry_offset;
2721 void java_lang_invoke_MethodHandle::compute_offsets() {
2722 Klass* klass_oop = SystemDictionary::MethodHandle_klass();
2723 if (klass_oop != NULL && EnableInvokeDynamic) {
2724 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
2725 compute_optional_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
2726 if (_form_offset == 0) {
2727 EnableInvokeDynamic = false;
2728 }
2729 }
2730 }
2732 void java_lang_invoke_MemberName::compute_offsets() {
2733 Klass* klass_oop = SystemDictionary::MemberName_klass();
2734 if (klass_oop != NULL && EnableInvokeDynamic) {
2735 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature());
2736 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature());
2737 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature());
2738 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature());
2739 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2740 }
2741 }
2743 void java_lang_invoke_LambdaForm::compute_offsets() {
2744 Klass* klass_oop = SystemDictionary::LambdaForm_klass();
2745 if (klass_oop != NULL && EnableInvokeDynamic) {
2746 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2747 }
2748 }
2750 oop java_lang_invoke_MethodHandle::type(oop mh) {
2751 return mh->obj_field(_type_offset);
2752 }
2754 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
2755 mh->obj_field_put(_type_offset, mtype);
2756 }
2758 oop java_lang_invoke_MethodHandle::form(oop mh) {
2759 assert(_form_offset != 0, "");
2760 return mh->obj_field(_form_offset);
2761 }
2763 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
2764 assert(_form_offset != 0, "");
2765 mh->obj_field_put(_form_offset, lform);
2766 }
2768 /// MemberName accessors
2770 oop java_lang_invoke_MemberName::clazz(oop mname) {
2771 assert(is_instance(mname), "wrong type");
2772 return mname->obj_field(_clazz_offset);
2773 }
2775 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
2776 assert(is_instance(mname), "wrong type");
2777 mname->obj_field_put(_clazz_offset, clazz);
2778 }
2780 oop java_lang_invoke_MemberName::name(oop mname) {
2781 assert(is_instance(mname), "wrong type");
2782 return mname->obj_field(_name_offset);
2783 }
2785 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
2786 assert(is_instance(mname), "wrong type");
2787 mname->obj_field_put(_name_offset, name);
2788 }
2790 oop java_lang_invoke_MemberName::type(oop mname) {
2791 assert(is_instance(mname), "wrong type");
2792 return mname->obj_field(_type_offset);
2793 }
2795 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
2796 assert(is_instance(mname), "wrong type");
2797 mname->obj_field_put(_type_offset, type);
2798 }
2800 int java_lang_invoke_MemberName::flags(oop mname) {
2801 assert(is_instance(mname), "wrong type");
2802 return mname->int_field(_flags_offset);
2803 }
2805 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
2806 assert(is_instance(mname), "wrong type");
2807 mname->int_field_put(_flags_offset, flags);
2808 }
2810 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
2811 assert(is_instance(mname), "wrong type");
2812 return (Metadata*)mname->address_field(_vmtarget_offset);
2813 }
2815 bool java_lang_invoke_MemberName::is_method(oop mname) {
2816 assert(is_instance(mname), "must be MemberName");
2817 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
2818 }
2820 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
2821 assert(is_instance(mname), "wrong type");
2822 // check the type of the vmtarget
2823 oop dependency = NULL;
2824 if (ref != NULL) {
2825 switch (flags(mname) & (MN_IS_METHOD |
2826 MN_IS_CONSTRUCTOR |
2827 MN_IS_FIELD)) {
2828 case MN_IS_METHOD:
2829 case MN_IS_CONSTRUCTOR:
2830 assert(ref->is_method(), "should be a method");
2831 dependency = ((Method*)ref)->method_holder()->java_mirror();
2832 break;
2833 case MN_IS_FIELD:
2834 assert(ref->is_klass(), "should be a class");
2835 dependency = ((Klass*)ref)->java_mirror();
2836 break;
2837 default:
2838 ShouldNotReachHere();
2839 }
2840 }
2841 mname->address_field_put(_vmtarget_offset, (address)ref);
2842 // Add a reference to the loader (actually mirror because anonymous classes will not have
2843 // distinct loaders) to ensure the metadata is kept alive
2844 // This mirror may be different than the one in clazz field.
2845 mname->obj_field_put(_vmloader_offset, dependency);
2846 }
2848 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
2849 assert(is_instance(mname), "wrong type");
2850 return (intptr_t) mname->address_field(_vmindex_offset);
2851 }
2853 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
2854 assert(is_instance(mname), "wrong type");
2855 mname->address_field_put(_vmindex_offset, (address) index);
2856 }
2858 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
2859 assert(is_instance(lform), "wrong type");
2860 return lform->obj_field(_vmentry_offset);
2861 }
2864 // Support for java_lang_invoke_MethodType
2866 int java_lang_invoke_MethodType::_rtype_offset;
2867 int java_lang_invoke_MethodType::_ptypes_offset;
2869 void java_lang_invoke_MethodType::compute_offsets() {
2870 Klass* k = SystemDictionary::MethodType_klass();
2871 if (k != NULL) {
2872 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2873 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2874 }
2875 }
2877 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
2878 st->print("(");
2879 objArrayOop pts = ptypes(mt);
2880 for (int i = 0, limit = pts->length(); i < limit; i++) {
2881 java_lang_Class::print_signature(pts->obj_at(i), st);
2882 }
2883 st->print(")");
2884 java_lang_Class::print_signature(rtype(mt), st);
2885 }
2887 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2888 ResourceMark rm;
2889 stringStream buffer(128);
2890 print_signature(mt, &buffer);
2891 const char* sigstr = buffer.base();
2892 int siglen = (int) buffer.size();
2893 Symbol *name;
2894 if (!intern_if_not_found) {
2895 name = SymbolTable::probe(sigstr, siglen);
2896 } else {
2897 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2898 }
2899 return name;
2900 }
2902 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
2903 if (mt1 == mt2)
2904 return true;
2905 if (rtype(mt1) != rtype(mt2))
2906 return false;
2907 if (ptype_count(mt1) != ptype_count(mt2))
2908 return false;
2909 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
2910 if (ptype(mt1, i) != ptype(mt2, i))
2911 return false;
2912 }
2913 return true;
2914 }
2916 oop java_lang_invoke_MethodType::rtype(oop mt) {
2917 assert(is_instance(mt), "must be a MethodType");
2918 return mt->obj_field(_rtype_offset);
2919 }
2921 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
2922 assert(is_instance(mt), "must be a MethodType");
2923 return (objArrayOop) mt->obj_field(_ptypes_offset);
2924 }
2926 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
2927 return ptypes(mt)->obj_at(idx);
2928 }
2930 int java_lang_invoke_MethodType::ptype_count(oop mt) {
2931 return ptypes(mt)->length();
2932 }
2934 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
2935 objArrayOop pts = ptypes(mt);
2936 int count = pts->length();
2937 int slots = 0;
2938 for (int i = 0; i < count; i++) {
2939 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
2940 slots += type2size[bt];
2941 }
2942 return slots;
2943 }
2945 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
2946 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
2947 return type2size[bt];
2948 }
2951 // Support for java_lang_invoke_CallSite
2953 int java_lang_invoke_CallSite::_target_offset;
2955 void java_lang_invoke_CallSite::compute_offsets() {
2956 if (!EnableInvokeDynamic) return;
2957 Klass* k = SystemDictionary::CallSite_klass();
2958 if (k != NULL) {
2959 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
2960 }
2961 }
2964 // Support for java_security_AccessControlContext
2966 int java_security_AccessControlContext::_context_offset = 0;
2967 int java_security_AccessControlContext::_privilegedContext_offset = 0;
2968 int java_security_AccessControlContext::_isPrivileged_offset = 0;
2969 int java_security_AccessControlContext::_isAuthorized_offset = -1;
2971 void java_security_AccessControlContext::compute_offsets() {
2972 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
2973 fieldDescriptor fd;
2974 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass());
2976 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
2977 fatal("Invalid layout of java.security.AccessControlContext");
2978 }
2979 _context_offset = fd.offset();
2981 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
2982 fatal("Invalid layout of java.security.AccessControlContext");
2983 }
2984 _privilegedContext_offset = fd.offset();
2986 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
2987 fatal("Invalid layout of java.security.AccessControlContext");
2988 }
2989 _isPrivileged_offset = fd.offset();
2991 // The offset may not be present for bootstrapping with older JDK.
2992 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
2993 _isAuthorized_offset = fd.offset();
2994 }
2995 }
2998 bool java_security_AccessControlContext::is_authorized(Handle context) {
2999 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
3000 assert(_isAuthorized_offset != -1, "should be set");
3001 return context->bool_field(_isAuthorized_offset) != 0;
3002 }
3004 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3005 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3006 // Ensure klass is initialized
3007 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
3008 // Allocate result
3009 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
3010 // Fill in values
3011 result->obj_field_put(_context_offset, context());
3012 result->obj_field_put(_privilegedContext_offset, privileged_context());
3013 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3014 // whitelist AccessControlContexts created by the JVM if present
3015 if (_isAuthorized_offset != -1) {
3016 result->bool_field_put(_isAuthorized_offset, true);
3017 }
3018 return result;
3019 }
3022 // Support for java_lang_ClassLoader
3024 bool java_lang_ClassLoader::offsets_computed = false;
3025 int java_lang_ClassLoader::_loader_data_offset = -1;
3026 int java_lang_ClassLoader::parallelCapable_offset = -1;
3028 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
3029 assert(loader != NULL && loader->is_oop(), "loader must be oop");
3030 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
3031 }
3033 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
3034 return *java_lang_ClassLoader::loader_data_addr(loader);
3035 }
3037 void java_lang_ClassLoader::compute_offsets() {
3038 assert(!offsets_computed, "offsets should be initialized only once");
3039 offsets_computed = true;
3041 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
3042 Klass* k1 = SystemDictionary::ClassLoader_klass();
3043 compute_optional_offset(parallelCapable_offset,
3044 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
3046 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3047 }
3049 oop java_lang_ClassLoader::parent(oop loader) {
3050 assert(is_instance(loader), "loader must be oop");
3051 return loader->obj_field(parent_offset);
3052 }
3054 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3055 assert(is_instance(loader), "loader must be oop");
3056 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3057 oop acl = loader;
3058 debug_only(jint loop_count = 0);
3059 // This loop taken verbatim from ClassLoader.java:
3060 do {
3061 acl = parent(acl);
3062 if (cl == acl) {
3063 return true;
3064 }
3065 assert(++loop_count > 0, "loop_count overflow");
3066 } while (acl != NULL);
3067 return false;
3068 }
3071 // For class loader classes, parallelCapable defined
3072 // based on non-null field
3073 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3074 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3075 if (!JDK_Version::is_gte_jdk17x_version()
3076 || parallelCapable_offset == -1) {
3077 // Default for backward compatibility is false
3078 return false;
3079 }
3080 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3081 }
3083 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3084 // Fix for 4474172; see evaluation for more details
3085 loader = non_reflection_class_loader(loader);
3087 oop cl = SystemDictionary::java_system_loader();
3088 while(cl != NULL) {
3089 if (cl == loader) return true;
3090 cl = parent(cl);
3091 }
3092 return false;
3093 }
3095 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3096 if (loader != NULL) {
3097 // See whether this is one of the class loaders associated with
3098 // the generated bytecodes for reflection, and if so, "magically"
3099 // delegate to its parent to prevent class loading from occurring
3100 // in places where applications using reflection didn't expect it.
3101 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3102 // This might be null in non-1.4 JDKs
3103 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
3104 return parent(loader);
3105 }
3106 }
3107 return loader;
3108 }
3111 // Support for java_lang_System
3112 int java_lang_System::in_offset_in_bytes() {
3113 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3114 }
3117 int java_lang_System::out_offset_in_bytes() {
3118 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3119 }
3122 int java_lang_System::err_offset_in_bytes() {
3123 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3124 }
3127 bool java_lang_System::has_security_manager() {
3128 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass());
3129 address addr = ik->static_field_addr(static_security_offset);
3130 if (UseCompressedOops) {
3131 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3132 } else {
3133 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3134 }
3135 }
3137 int java_lang_Class::_klass_offset;
3138 int java_lang_Class::_array_klass_offset;
3139 int java_lang_Class::_oop_size_offset;
3140 int java_lang_Class::_static_oop_field_count_offset;
3141 int java_lang_Class::_class_loader_offset;
3142 int java_lang_Class::_protection_domain_offset;
3143 int java_lang_Class::_init_lock_offset;
3144 int java_lang_Class::_signers_offset;
3145 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3146 int java_lang_Throwable::backtrace_offset;
3147 int java_lang_Throwable::detailMessage_offset;
3148 int java_lang_Throwable::cause_offset;
3149 int java_lang_Throwable::stackTrace_offset;
3150 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3151 int java_lang_reflect_AccessibleObject::override_offset;
3152 int java_lang_reflect_Method::clazz_offset;
3153 int java_lang_reflect_Method::name_offset;
3154 int java_lang_reflect_Method::returnType_offset;
3155 int java_lang_reflect_Method::parameterTypes_offset;
3156 int java_lang_reflect_Method::exceptionTypes_offset;
3157 int java_lang_reflect_Method::slot_offset;
3158 int java_lang_reflect_Method::modifiers_offset;
3159 int java_lang_reflect_Method::signature_offset;
3160 int java_lang_reflect_Method::annotations_offset;
3161 int java_lang_reflect_Method::parameter_annotations_offset;
3162 int java_lang_reflect_Method::annotation_default_offset;
3163 int java_lang_reflect_Method::type_annotations_offset;
3164 int java_lang_reflect_Constructor::clazz_offset;
3165 int java_lang_reflect_Constructor::parameterTypes_offset;
3166 int java_lang_reflect_Constructor::exceptionTypes_offset;
3167 int java_lang_reflect_Constructor::slot_offset;
3168 int java_lang_reflect_Constructor::modifiers_offset;
3169 int java_lang_reflect_Constructor::signature_offset;
3170 int java_lang_reflect_Constructor::annotations_offset;
3171 int java_lang_reflect_Constructor::parameter_annotations_offset;
3172 int java_lang_reflect_Constructor::type_annotations_offset;
3173 int java_lang_reflect_Field::clazz_offset;
3174 int java_lang_reflect_Field::name_offset;
3175 int java_lang_reflect_Field::type_offset;
3176 int java_lang_reflect_Field::slot_offset;
3177 int java_lang_reflect_Field::modifiers_offset;
3178 int java_lang_reflect_Field::signature_offset;
3179 int java_lang_reflect_Field::annotations_offset;
3180 int java_lang_reflect_Field::type_annotations_offset;
3181 int java_lang_reflect_Parameter::name_offset;
3182 int java_lang_reflect_Parameter::modifiers_offset;
3183 int java_lang_reflect_Parameter::index_offset;
3184 int java_lang_reflect_Parameter::executable_offset;
3185 int java_lang_boxing_object::value_offset;
3186 int java_lang_boxing_object::long_value_offset;
3187 int java_lang_ref_Reference::referent_offset;
3188 int java_lang_ref_Reference::queue_offset;
3189 int java_lang_ref_Reference::next_offset;
3190 int java_lang_ref_Reference::discovered_offset;
3191 int java_lang_ref_Reference::static_lock_offset;
3192 int java_lang_ref_Reference::static_pending_offset;
3193 int java_lang_ref_Reference::number_of_fake_oop_fields;
3194 int java_lang_ref_SoftReference::timestamp_offset;
3195 int java_lang_ref_SoftReference::static_clock_offset;
3196 int java_lang_ClassLoader::parent_offset;
3197 int java_lang_System::static_in_offset;
3198 int java_lang_System::static_out_offset;
3199 int java_lang_System::static_err_offset;
3200 int java_lang_System::static_security_offset;
3201 int java_lang_StackTraceElement::declaringClass_offset;
3202 int java_lang_StackTraceElement::methodName_offset;
3203 int java_lang_StackTraceElement::fileName_offset;
3204 int java_lang_StackTraceElement::lineNumber_offset;
3205 int java_lang_AssertionStatusDirectives::classes_offset;
3206 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3207 int java_lang_AssertionStatusDirectives::packages_offset;
3208 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3209 int java_lang_AssertionStatusDirectives::deflt_offset;
3210 int java_nio_Buffer::_limit_offset;
3211 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3212 int sun_reflect_ConstantPool::_oop_offset;
3213 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3216 // Support for java_lang_StackTraceElement
3218 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3219 element->obj_field_put(fileName_offset, value);
3220 }
3222 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3223 element->obj_field_put(declaringClass_offset, value);
3224 }
3226 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3227 element->obj_field_put(methodName_offset, value);
3228 }
3230 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3231 element->int_field_put(lineNumber_offset, value);
3232 }
3235 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3237 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3238 o->obj_field_put(classes_offset, val);
3239 }
3241 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3242 o->obj_field_put(classEnabled_offset, val);
3243 }
3245 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3246 o->obj_field_put(packages_offset, val);
3247 }
3249 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3250 o->obj_field_put(packageEnabled_offset, val);
3251 }
3253 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3254 o->bool_field_put(deflt_offset, val);
3255 }
3258 // Support for intrinsification of java.nio.Buffer.checkIndex
3259 int java_nio_Buffer::limit_offset() {
3260 return _limit_offset;
3261 }
3264 void java_nio_Buffer::compute_offsets() {
3265 Klass* k = SystemDictionary::nio_Buffer_klass();
3266 assert(k != NULL, "must be loaded in 1.4+");
3267 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3268 }
3270 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3271 if (_owner_offset != 0) return;
3273 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
3274 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3275 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3276 compute_offset(_owner_offset, k,
3277 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3278 }
3280 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3281 assert(_owner_offset != 0, "Must be initialized");
3282 return obj->obj_field(_owner_offset);
3283 }
3285 // Compute hard-coded offsets
3286 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3287 // are not available to determine the offset_of_static_fields.
3288 void JavaClasses::compute_hard_coded_offsets() {
3289 const int x = heapOopSize;
3290 const int header = instanceOopDesc::base_offset_in_bytes();
3292 // Throwable Class
3293 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
3294 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3295 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
3296 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3297 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x;
3299 // java_lang_boxing_object
3300 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3301 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3303 // java_lang_ref_Reference:
3304 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3305 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3306 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
3307 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
3308 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
3309 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3310 // Artificial fields for java_lang_ref_Reference
3311 // The first field is for the discovered field added in 1.4
3312 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3314 // java_lang_ref_SoftReference Class
3315 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3316 // Don't multiply static fields because they are always in wordSize units
3317 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3319 // java_lang_ClassLoader
3320 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3322 // java_lang_System
3323 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
3324 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3325 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3326 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3328 // java_lang_StackTraceElement
3329 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
3330 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3331 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
3332 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3333 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3334 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3335 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3336 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3337 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3339 }
3342 // Compute non-hard-coded field offsets of all the classes in this file
3343 void JavaClasses::compute_offsets() {
3344 // java_lang_Class::compute_offsets was called earlier in bootstrap
3345 java_lang_ClassLoader::compute_offsets();
3346 java_lang_Thread::compute_offsets();
3347 java_lang_ThreadGroup::compute_offsets();
3348 if (EnableInvokeDynamic) {
3349 java_lang_invoke_MethodHandle::compute_offsets();
3350 java_lang_invoke_DirectMethodHandle::compute_offsets();
3351 java_lang_invoke_MemberName::compute_offsets();
3352 java_lang_invoke_LambdaForm::compute_offsets();
3353 java_lang_invoke_MethodType::compute_offsets();
3354 java_lang_invoke_CallSite::compute_offsets();
3355 }
3356 java_security_AccessControlContext::compute_offsets();
3357 // Initialize reflection classes. The layouts of these classes
3358 // changed with the new reflection implementation in JDK 1.4, and
3359 // since the Universe doesn't know what JDK version it is until this
3360 // point we defer computation of these offsets until now.
3361 java_lang_reflect_AccessibleObject::compute_offsets();
3362 java_lang_reflect_Method::compute_offsets();
3363 java_lang_reflect_Constructor::compute_offsets();
3364 java_lang_reflect_Field::compute_offsets();
3365 if (JDK_Version::is_gte_jdk14x_version()) {
3366 java_nio_Buffer::compute_offsets();
3367 }
3368 if (JDK_Version::is_gte_jdk15x_version()) {
3369 sun_reflect_ConstantPool::compute_offsets();
3370 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3371 }
3372 if (JDK_Version::is_jdk18x_version())
3373 java_lang_reflect_Parameter::compute_offsets();
3375 // generated interpreter code wants to know about the offsets we just computed:
3376 AbstractAssembler::update_delayed_values();
3377 }
3379 #ifndef PRODUCT
3381 // These functions exist to assert the validity of hard-coded field offsets to guard
3382 // against changes in the class files
3384 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3385 EXCEPTION_MARK;
3386 fieldDescriptor fd;
3387 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3388 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3389 instanceKlassHandle h_klass (THREAD, k);
3390 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3391 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3392 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3393 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3394 return false;
3395 }
3396 if (fd.is_static()) {
3397 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3398 return false;
3399 }
3400 if (fd.offset() == hardcoded_offset ) {
3401 return true;
3402 } else {
3403 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3404 klass_name, field_name, hardcoded_offset, fd.offset());
3405 return false;
3406 }
3407 }
3410 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3411 EXCEPTION_MARK;
3412 fieldDescriptor fd;
3413 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3414 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3415 instanceKlassHandle h_klass (THREAD, k);
3416 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3417 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3418 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3419 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3420 return false;
3421 }
3422 if (!fd.is_static()) {
3423 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3424 return false;
3425 }
3426 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3427 return true;
3428 } else {
3429 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());
3430 return false;
3431 }
3432 }
3435 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3436 EXCEPTION_MARK;
3437 fieldDescriptor fd;
3438 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3439 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3440 instanceKlassHandle h_klass (THREAD, k);
3441 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3442 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3443 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3444 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3445 return false;
3446 }
3447 if (!fd.is_static() || !fd.has_initial_value()) {
3448 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3449 return false;
3450 }
3451 if (!fd.initial_value_tag().is_int()) {
3452 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3453 return false;
3454 }
3455 jint field_value = fd.int_initial_value();
3456 if (field_value == hardcoded_constant) {
3457 return true;
3458 } else {
3459 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);
3460 return false;
3461 }
3462 }
3465 // Check the hard-coded field offsets of all the classes in this file
3467 void JavaClasses::check_offsets() {
3468 bool valid = true;
3469 HandleMark hm;
3471 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3472 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3474 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3475 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3477 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3478 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3480 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3481 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3483 // java.lang.String
3485 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3486 if (java_lang_String::has_offset_field()) {
3487 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3488 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3489 }
3490 if (java_lang_String::has_hash_field()) {
3491 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3492 }
3494 // java.lang.Class
3496 // Fake fields
3497 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3498 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3500 // java.lang.Throwable
3502 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3503 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3504 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3505 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3507 // Boxed primitive objects (java_lang_boxing_object)
3509 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3510 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3511 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3512 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3513 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3514 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3515 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3516 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3518 // java.lang.ClassLoader
3520 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3522 // java.lang.System
3524 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3525 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3526 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3527 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
3529 // java.lang.StackTraceElement
3531 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3532 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3533 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3534 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3536 // java.lang.ref.Reference
3538 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3539 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3540 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3541 // Fake field
3542 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3543 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3544 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3546 // java.lang.ref.SoftReference
3548 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3549 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3551 // java.lang.AssertionStatusDirectives
3552 //
3553 // The CheckAssertionStatusDirectives boolean can be removed from here and
3554 // globals.hpp after the AssertionStatusDirectives class has been integrated
3555 // into merlin "for some time." Without it, the vm will fail with early
3556 // merlin builds.
3558 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) {
3559 const char* nm = "java/lang/AssertionStatusDirectives";
3560 const char* sig = "[Ljava/lang/String;";
3561 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3562 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3563 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3564 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3565 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3566 }
3568 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3569 }
3571 #endif // PRODUCT
3573 int InjectedField::compute_offset() {
3574 Klass* klass_oop = klass();
3575 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3576 if (!may_be_java && !fs.access_flags().is_internal()) {
3577 // Only look at injected fields
3578 continue;
3579 }
3580 if (fs.name() == name() && fs.signature() == signature()) {
3581 return fs.offset();
3582 }
3583 }
3584 ResourceMark rm;
3585 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)" : "");
3586 #ifndef PRODUCT
3587 klass_oop->print();
3588 tty->print_cr("all fields:");
3589 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3590 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
3591 }
3592 #endif //PRODUCT
3593 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class");
3594 return -1;
3595 }
3597 void javaClasses_init() {
3598 JavaClasses::compute_offsets();
3599 JavaClasses::check_offsets();
3600 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3601 }