Wed, 18 Sep 2013 07:02:10 -0700
8019835: Strings interned in different threads equal but does not ==
Summary: Add -XX:+VerifyStringTableAtExit option and code to verify StringTable invariants.
Reviewed-by: rdurbin, sspitsyn, coleenp
1 /*
2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #include "precompiled.hpp"
26 #include "classfile/altHashing.hpp"
27 #include "classfile/javaClasses.hpp"
28 #include "classfile/symbolTable.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "code/debugInfo.hpp"
31 #include "code/pcDesc.hpp"
32 #include "compiler/compilerOracle.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "memory/oopFactory.hpp"
35 #include "memory/resourceArea.hpp"
36 #include "memory/universe.inline.hpp"
37 #include "oops/fieldStreams.hpp"
38 #include "oops/instanceKlass.hpp"
39 #include "oops/instanceMirrorKlass.hpp"
40 #include "oops/klass.hpp"
41 #include "oops/method.hpp"
42 #include "oops/symbol.hpp"
43 #include "oops/typeArrayOop.hpp"
44 #include "runtime/fieldDescriptor.hpp"
45 #include "runtime/handles.inline.hpp"
46 #include "runtime/interfaceSupport.hpp"
47 #include "runtime/java.hpp"
48 #include "runtime/javaCalls.hpp"
49 #include "runtime/safepoint.hpp"
50 #include "runtime/thread.inline.hpp"
51 #include "runtime/vframe.hpp"
52 #include "utilities/preserveException.hpp"
54 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
55 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
57 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
58 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
60 InjectedField JavaClasses::_injected_fields[] = {
61 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
62 };
64 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
65 return _injected_fields[id].compute_offset();
66 }
69 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
70 *field_count = 0;
72 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
73 if (sid == vmSymbols::NO_SID) {
74 // Only well known classes can inject fields
75 return NULL;
76 }
78 int count = 0;
79 int start = -1;
81 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
82 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
83 count++; \
84 if (start == -1) start = klass##_##name##_enum; \
85 }
86 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
87 #undef LOOKUP_INJECTED_FIELD
89 if (start != -1) {
90 *field_count = count;
91 return _injected_fields + start;
92 }
93 return NULL;
94 }
97 static bool find_field(InstanceKlass* ik,
98 Symbol* name_symbol, Symbol* signature_symbol,
99 fieldDescriptor* fd,
100 bool allow_super = false) {
101 if (allow_super)
102 return ik->find_field(name_symbol, signature_symbol, fd) != NULL;
103 else
104 return ik->find_local_field(name_symbol, signature_symbol, fd);
105 }
107 // Helpful routine for computing field offsets at run time rather than hardcoding them
108 static void
109 compute_offset(int &dest_offset,
110 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
111 bool allow_super = false) {
112 fieldDescriptor fd;
113 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
114 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
115 ResourceMark rm;
116 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
117 #ifndef PRODUCT
118 klass_oop->print();
119 tty->print_cr("all fields:");
120 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
121 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
122 }
123 #endif //PRODUCT
124 fatal("Invalid layout of preloaded class");
125 }
126 dest_offset = fd.offset();
127 }
129 // Same as above but for "optional" offsets that might not be present in certain JDK versions
130 static void
131 compute_optional_offset(int& dest_offset,
132 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
133 bool allow_super = false) {
134 fieldDescriptor fd;
135 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
136 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
137 dest_offset = fd.offset();
138 }
139 }
142 int java_lang_String::value_offset = 0;
143 int java_lang_String::offset_offset = 0;
144 int java_lang_String::count_offset = 0;
145 int java_lang_String::hash_offset = 0;
147 bool java_lang_String::initialized = false;
149 void java_lang_String::compute_offsets() {
150 assert(!initialized, "offsets should be initialized only once");
152 Klass* k = SystemDictionary::String_klass();
153 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature());
154 compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature());
155 compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature());
156 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature());
158 initialized = true;
159 }
161 Handle java_lang_String::basic_create(int length, TRAPS) {
162 assert(initialized, "Must be initialized");
163 // Create the String object first, so there's a chance that the String
164 // and the char array it points to end up in the same cache line.
165 oop obj;
166 obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH);
168 // Create the char array. The String object must be handlized here
169 // because GC can happen as a result of the allocation attempt.
170 Handle h_obj(THREAD, obj);
171 typeArrayOop buffer;
172 buffer = oopFactory::new_charArray(length, CHECK_NH);
174 // Point the String at the char array
175 obj = h_obj();
176 set_value(obj, buffer);
177 // No need to zero the offset, allocation zero'ed the entire String object
178 assert(offset(obj) == 0, "initial String offset should be zero");
179 //set_offset(obj, 0);
180 set_count(obj, length);
182 return h_obj;
183 }
185 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
186 Handle h_obj = basic_create(length, CHECK_NH);
187 typeArrayOop buffer = value(h_obj());
188 for (int index = 0; index < length; index++) {
189 buffer->char_at_put(index, unicode[index]);
190 }
191 return h_obj;
192 }
194 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
195 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
196 return h_obj();
197 }
199 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
200 if (utf8_str == NULL) {
201 return Handle();
202 }
203 int length = UTF8::unicode_length(utf8_str);
204 Handle h_obj = basic_create(length, CHECK_NH);
205 if (length > 0) {
206 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
207 }
208 return h_obj;
209 }
211 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
212 Handle h_obj = create_from_str(utf8_str, CHECK_0);
213 return h_obj();
214 }
216 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
217 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
218 Handle h_obj = basic_create(length, CHECK_NH);
219 if (length > 0) {
220 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
221 }
222 return h_obj;
223 }
225 // Converts a C string to a Java String based on current encoding
226 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
227 assert(str != NULL, "bad arguments");
229 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
230 static to_java_string_fn_t _to_java_string_fn = NULL;
232 if (_to_java_string_fn == NULL) {
233 void *lib_handle = os::native_java_library();
234 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
235 if (_to_java_string_fn == NULL) {
236 fatal("NewStringPlatform missing");
237 }
238 }
240 jstring js = NULL;
241 { JavaThread* thread = (JavaThread*)THREAD;
242 assert(thread->is_Java_thread(), "must be java thread");
243 HandleMark hm(thread);
244 ThreadToNativeFromVM ttn(thread);
245 js = (_to_java_string_fn)(thread->jni_environment(), str);
246 }
247 return Handle(THREAD, JNIHandles::resolve(js));
248 }
250 // Converts a Java String to a native C string that can be used for
251 // native OS calls.
252 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
254 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
255 static to_platform_string_fn_t _to_platform_string_fn = NULL;
257 if (_to_platform_string_fn == NULL) {
258 void *lib_handle = os::native_java_library();
259 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
260 if (_to_platform_string_fn == NULL) {
261 fatal("GetStringPlatformChars missing");
262 }
263 }
265 char *native_platform_string;
266 { JavaThread* thread = (JavaThread*)THREAD;
267 assert(thread->is_Java_thread(), "must be java thread");
268 JNIEnv *env = thread->jni_environment();
269 jstring js = (jstring) JNIHandles::make_local(env, java_string());
270 bool is_copy;
271 HandleMark hm(thread);
272 ThreadToNativeFromVM ttn(thread);
273 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
274 assert(is_copy == JNI_TRUE, "is_copy value changed");
275 JNIHandles::destroy_local(js);
276 }
277 return native_platform_string;
278 }
280 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
281 oop obj = java_string();
282 // Typical usage is to convert all '/' to '.' in string.
283 typeArrayOop value = java_lang_String::value(obj);
284 int offset = java_lang_String::offset(obj);
285 int length = java_lang_String::length(obj);
287 // First check if any from_char exist
288 int index; // Declared outside, used later
289 for (index = 0; index < length; index++) {
290 if (value->char_at(index + offset) == from_char) {
291 break;
292 }
293 }
294 if (index == length) {
295 // No from_char, so do not copy.
296 return java_string;
297 }
299 // Create new UNICODE buffer. Must handlize value because GC
300 // may happen during String and char array creation.
301 typeArrayHandle h_value(THREAD, value);
302 Handle string = basic_create(length, CHECK_NH);
304 typeArrayOop from_buffer = h_value();
305 typeArrayOop to_buffer = java_lang_String::value(string());
307 // Copy contents
308 for (index = 0; index < length; index++) {
309 jchar c = from_buffer->char_at(index + offset);
310 if (c == from_char) {
311 c = to_char;
312 }
313 to_buffer->char_at_put(index, c);
314 }
315 return string;
316 }
318 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
319 typeArrayOop value = java_lang_String::value(java_string);
320 int offset = java_lang_String::offset(java_string);
321 length = java_lang_String::length(java_string);
323 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
324 if (result != NULL) {
325 for (int index = 0; index < length; index++) {
326 result[index] = value->char_at(index + offset);
327 }
328 } else {
329 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
330 }
331 return result;
332 }
334 unsigned int java_lang_String::hash_code(oop java_string) {
335 int length = java_lang_String::length(java_string);
336 // Zero length string will hash to zero with String.hashCode() function.
337 if (length == 0) return 0;
339 typeArrayOop value = java_lang_String::value(java_string);
340 int offset = java_lang_String::offset(java_string);
341 return java_lang_String::hash_code(value->char_at_addr(offset), length);
342 }
344 char* java_lang_String::as_quoted_ascii(oop java_string) {
345 typeArrayOop value = java_lang_String::value(java_string);
346 int offset = java_lang_String::offset(java_string);
347 int length = java_lang_String::length(java_string);
349 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
350 if (base == NULL) return NULL;
352 int result_length = UNICODE::quoted_ascii_length(base, length) + 1;
353 char* result = NEW_RESOURCE_ARRAY(char, result_length);
354 UNICODE::as_quoted_ascii(base, length, result, result_length);
355 assert(result_length >= length + 1, "must not be shorter");
356 assert(result_length == (int)strlen(result) + 1, "must match");
357 return result;
358 }
360 unsigned int java_lang_String::hash_string(oop java_string) {
361 int length = java_lang_String::length(java_string);
362 // Zero length string doesn't hash necessarily hash to zero.
363 if (length == 0) {
364 return StringTable::hash_string(NULL, 0);
365 }
367 typeArrayOop value = java_lang_String::value(java_string);
368 int offset = java_lang_String::offset(java_string);
369 return StringTable::hash_string(value->char_at_addr(offset), length);
370 }
372 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {
373 oop obj = java_string();
374 typeArrayOop value = java_lang_String::value(obj);
375 int offset = java_lang_String::offset(obj);
376 int length = java_lang_String::length(obj);
377 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
378 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
379 return sym;
380 }
382 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
383 typeArrayOop value = java_lang_String::value(java_string);
384 int offset = java_lang_String::offset(java_string);
385 int length = java_lang_String::length(java_string);
386 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
387 return SymbolTable::probe_unicode(base, length);
388 }
391 int java_lang_String::utf8_length(oop java_string) {
392 typeArrayOop value = java_lang_String::value(java_string);
393 int offset = java_lang_String::offset(java_string);
394 int length = java_lang_String::length(java_string);
395 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
396 return UNICODE::utf8_length(position, length);
397 }
399 char* java_lang_String::as_utf8_string(oop java_string) {
400 typeArrayOop value = java_lang_String::value(java_string);
401 int offset = java_lang_String::offset(java_string);
402 int length = java_lang_String::length(java_string);
403 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
404 return UNICODE::as_utf8(position, length);
405 }
407 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
408 typeArrayOop value = java_lang_String::value(java_string);
409 int offset = java_lang_String::offset(java_string);
410 int length = java_lang_String::length(java_string);
411 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
412 return UNICODE::as_utf8(position, length, buf, buflen);
413 }
415 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
416 typeArrayOop value = java_lang_String::value(java_string);
417 int offset = java_lang_String::offset(java_string);
418 int length = java_lang_String::length(java_string);
419 assert(start + len <= length, "just checking");
420 jchar* position = value->char_at_addr(offset + start);
421 return UNICODE::as_utf8(position, len);
422 }
424 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
425 assert(java_string->klass() == SystemDictionary::String_klass(),
426 "must be java_string");
427 typeArrayOop value = java_lang_String::value(java_string);
428 int offset = java_lang_String::offset(java_string);
429 int length = java_lang_String::length(java_string);
430 if (length != len) {
431 return false;
432 }
433 for (int i = 0; i < len; i++) {
434 if (value->char_at(i + offset) != chars[i]) {
435 return false;
436 }
437 }
438 return true;
439 }
441 bool java_lang_String::equals(oop str1, oop str2) {
442 assert(str1->klass() == SystemDictionary::String_klass(),
443 "must be java String");
444 assert(str2->klass() == SystemDictionary::String_klass(),
445 "must be java String");
446 typeArrayOop value1 = java_lang_String::value(str1);
447 int offset1 = java_lang_String::offset(str1);
448 int length1 = java_lang_String::length(str1);
449 typeArrayOop value2 = java_lang_String::value(str2);
450 int offset2 = java_lang_String::offset(str2);
451 int length2 = java_lang_String::length(str2);
453 if (length1 != length2) {
454 return false;
455 }
456 for (int i = 0; i < length1; i++) {
457 if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) {
458 return false;
459 }
460 }
461 return true;
462 }
464 void java_lang_String::print(Handle java_string, outputStream* st) {
465 oop obj = java_string();
466 assert(obj->klass() == SystemDictionary::String_klass(), "must be java_string");
467 typeArrayOop value = java_lang_String::value(obj);
468 int offset = java_lang_String::offset(obj);
469 int length = java_lang_String::length(obj);
471 int end = MIN2(length, 100);
472 if (value == NULL) {
473 // This can happen if, e.g., printing a String
474 // object before its initializer has been called
475 st->print_cr("NULL");
476 } else {
477 st->print("\"");
478 for (int index = 0; index < length; index++) {
479 st->print("%c", value->char_at(index + offset));
480 }
481 st->print("\"");
482 }
483 }
485 static void initialize_static_field(fieldDescriptor* fd, TRAPS) {
486 Handle mirror (THREAD, fd->field_holder()->java_mirror());
487 assert(mirror.not_null() && fd->is_static(), "just checking");
488 if (fd->has_initial_value()) {
489 BasicType t = fd->field_type();
490 switch (t) {
491 case T_BYTE:
492 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
493 break;
494 case T_BOOLEAN:
495 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
496 break;
497 case T_CHAR:
498 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
499 break;
500 case T_SHORT:
501 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
502 break;
503 case T_INT:
504 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
505 break;
506 case T_FLOAT:
507 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
508 break;
509 case T_DOUBLE:
510 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
511 break;
512 case T_LONG:
513 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
514 break;
515 case T_OBJECT:
516 {
517 #ifdef ASSERT
518 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
519 assert(fd->signature() == sym, "just checking");
520 #endif
521 oop string = fd->string_initial_value(CHECK);
522 mirror()->obj_field_put(fd->offset(), string);
523 }
524 break;
525 default:
526 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
527 "Illegal ConstantValue attribute in class file");
528 }
529 }
530 }
533 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) {
534 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
536 // If the offset was read from the shared archive, it was fixed up already
537 if (!k->is_shared()) {
538 if (k->oop_is_instance()) {
539 // During bootstrap, java.lang.Class wasn't loaded so static field
540 // offsets were computed without the size added it. Go back and
541 // update all the static field offsets to included the size.
542 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) {
543 if (fs.access_flags().is_static()) {
544 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
545 fs.set_offset(real_offset);
546 }
547 }
548 }
549 }
550 create_mirror(k, Handle(NULL), CHECK);
551 }
553 oop java_lang_Class::create_mirror(KlassHandle k, Handle protection_domain, TRAPS) {
554 assert(k->java_mirror() == NULL, "should only assign mirror once");
555 // Use this moment of initialization to cache modifier_flags also,
556 // to support Class.getModifiers(). Instance classes recalculate
557 // the cached flags after the class file is parsed, but before the
558 // class is put into the system dictionary.
559 int computed_modifiers = k->compute_modifier_flags(CHECK_0);
560 k->set_modifier_flags(computed_modifiers);
561 // Class_klass has to be loaded because it is used to allocate
562 // the mirror.
563 if (SystemDictionary::Class_klass_loaded()) {
564 // Allocate mirror (java.lang.Class instance)
565 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK_0);
567 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
568 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
570 // It might also have a component mirror. This mirror must already exist.
571 if (k->oop_is_array()) {
572 Handle comp_mirror;
573 if (k->oop_is_typeArray()) {
574 BasicType type = TypeArrayKlass::cast(k())->element_type();
575 comp_mirror = Universe::java_mirror(type);
576 } else {
577 assert(k->oop_is_objArray(), "Must be");
578 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass();
579 assert(element_klass != NULL, "Must have an element klass");
580 comp_mirror = element_klass->java_mirror();
581 }
582 assert(comp_mirror.not_null(), "must have a mirror");
584 // Two-way link between the array klass and its component mirror:
585 ArrayKlass::cast(k())->set_component_mirror(comp_mirror());
586 set_array_klass(comp_mirror(), k());
587 } else {
588 assert(k->oop_is_instance(), "Must be");
590 // Allocate a simple java object for a lock.
591 // This needs to be a java object because during class initialization
592 // it can be held across a java call.
593 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_NULL);
594 set_init_lock(mirror(), r);
596 // Set protection domain also
597 set_protection_domain(mirror(), protection_domain());
599 // Initialize static fields
600 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, CHECK_NULL);
601 }
602 return mirror();
603 } else {
604 if (fixup_mirror_list() == NULL) {
605 GrowableArray<Klass*>* list =
606 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
607 set_fixup_mirror_list(list);
608 }
609 fixup_mirror_list()->push(k());
610 return NULL;
611 }
612 }
616 int java_lang_Class::oop_size(oop java_class) {
617 assert(_oop_size_offset != 0, "must be set");
618 return java_class->int_field(_oop_size_offset);
619 }
620 void java_lang_Class::set_oop_size(oop java_class, int size) {
621 assert(_oop_size_offset != 0, "must be set");
622 java_class->int_field_put(_oop_size_offset, size);
623 }
624 int java_lang_Class::static_oop_field_count(oop java_class) {
625 assert(_static_oop_field_count_offset != 0, "must be set");
626 return java_class->int_field(_static_oop_field_count_offset);
627 }
628 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
629 assert(_static_oop_field_count_offset != 0, "must be set");
630 java_class->int_field_put(_static_oop_field_count_offset, size);
631 }
633 oop java_lang_Class::protection_domain(oop java_class) {
634 assert(_protection_domain_offset != 0, "must be set");
635 return java_class->obj_field(_protection_domain_offset);
636 }
637 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
638 assert(_protection_domain_offset != 0, "must be set");
639 java_class->obj_field_put(_protection_domain_offset, pd);
640 }
642 oop java_lang_Class::init_lock(oop java_class) {
643 assert(_init_lock_offset != 0, "must be set");
644 return java_class->obj_field(_init_lock_offset);
645 }
646 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
647 assert(_init_lock_offset != 0, "must be set");
648 java_class->obj_field_put(_init_lock_offset, init_lock);
649 }
651 objArrayOop java_lang_Class::signers(oop java_class) {
652 assert(_signers_offset != 0, "must be set");
653 return (objArrayOop)java_class->obj_field(_signers_offset);
654 }
655 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
656 assert(_signers_offset != 0, "must be set");
657 java_class->obj_field_put(_signers_offset, (oop)signers);
658 }
661 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
662 // This should be improved by adding a field at the Java level or by
663 // introducing a new VM klass (see comment in ClassFileParser)
664 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
665 if (type != T_VOID) {
666 Klass* aklass = Universe::typeArrayKlassObj(type);
667 assert(aklass != NULL, "correct bootstrap");
668 set_array_klass(java_class, aklass);
669 }
670 #ifdef ASSERT
671 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
672 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
673 #endif
674 return java_class;
675 }
678 Klass* java_lang_Class::as_Klass(oop java_class) {
679 //%note memory_2
680 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
681 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
682 assert(k == NULL || k->is_klass(), "type check");
683 return k;
684 }
687 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
688 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
689 java_class->metadata_field_put(_klass_offset, klass);
690 }
693 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
694 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
695 Symbol* name = NULL;
696 bool is_instance = false;
697 if (is_primitive(java_class)) {
698 name = vmSymbols::type_signature(primitive_type(java_class));
699 } else {
700 Klass* k = as_Klass(java_class);
701 is_instance = k->oop_is_instance();
702 name = k->name();
703 }
704 if (name == NULL) {
705 st->print("<null>");
706 return;
707 }
708 if (is_instance) st->print("L");
709 st->write((char*) name->base(), (int) name->utf8_length());
710 if (is_instance) st->print(";");
711 }
713 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
714 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
715 Symbol* name;
716 if (is_primitive(java_class)) {
717 name = vmSymbols::type_signature(primitive_type(java_class));
718 // Because this can create a new symbol, the caller has to decrement
719 // the refcount, so make adjustment here and below for symbols returned
720 // that are not created or incremented due to a successful lookup.
721 name->increment_refcount();
722 } else {
723 Klass* k = as_Klass(java_class);
724 if (!k->oop_is_instance()) {
725 name = k->name();
726 name->increment_refcount();
727 } else {
728 ResourceMark rm;
729 const char* sigstr = k->signature_name();
730 int siglen = (int) strlen(sigstr);
731 if (!intern_if_not_found) {
732 name = SymbolTable::probe(sigstr, siglen);
733 } else {
734 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
735 }
736 }
737 }
738 return name;
739 }
742 Klass* java_lang_Class::array_klass(oop java_class) {
743 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
744 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass");
745 return k;
746 }
749 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
750 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass");
751 java_class->metadata_field_put(_array_klass_offset, klass);
752 }
755 bool java_lang_Class::is_primitive(oop java_class) {
756 // should assert:
757 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
758 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
760 #ifdef ASSERT
761 if (is_primitive) {
762 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
763 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
764 "Should be either the T_VOID primitive or a java primitive");
765 }
766 #endif
768 return is_primitive;
769 }
772 BasicType java_lang_Class::primitive_type(oop java_class) {
773 assert(java_lang_Class::is_primitive(java_class), "just checking");
774 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
775 BasicType type = T_VOID;
776 if (ak != NULL) {
777 // Note: create_basic_type_mirror above initializes ak to a non-null value.
778 type = ArrayKlass::cast(ak)->element_type();
779 } else {
780 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
781 }
782 assert(Universe::java_mirror(type) == java_class, "must be consistent");
783 return type;
784 }
786 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
787 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
788 if (is_primitive(java_class)) {
789 if (reference_klass != NULL)
790 (*reference_klass) = NULL;
791 return primitive_type(java_class);
792 } else {
793 if (reference_klass != NULL)
794 (*reference_klass) = as_Klass(java_class);
795 return T_OBJECT;
796 }
797 }
800 oop java_lang_Class::primitive_mirror(BasicType t) {
801 oop mirror = Universe::java_mirror(t);
802 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
803 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
804 return mirror;
805 }
807 bool java_lang_Class::offsets_computed = false;
808 int java_lang_Class::classRedefinedCount_offset = -1;
810 void java_lang_Class::compute_offsets() {
811 assert(!offsets_computed, "offsets should be initialized only once");
812 offsets_computed = true;
814 Klass* klass_oop = SystemDictionary::Class_klass();
815 // The classRedefinedCount field is only present starting in 1.5,
816 // so don't go fatal.
817 compute_optional_offset(classRedefinedCount_offset,
818 klass_oop, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
820 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
821 }
823 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
824 if (!JDK_Version::is_gte_jdk15x_version()
825 || classRedefinedCount_offset == -1) {
826 // The classRedefinedCount field is only present starting in 1.5.
827 // If we don't have an offset for it then just return -1 as a marker.
828 return -1;
829 }
831 return the_class_mirror->int_field(classRedefinedCount_offset);
832 }
834 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
835 if (!JDK_Version::is_gte_jdk15x_version()
836 || classRedefinedCount_offset == -1) {
837 // The classRedefinedCount field is only present starting in 1.5.
838 // If we don't have an offset for it then nothing to set.
839 return;
840 }
842 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
843 }
846 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
847 // platform thread structure, and a eetop offset which was used for thread
848 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
849 // merged, so in the HotSpot VM we just use the eetop field for the thread
850 // instead of the privateInfo_offset.
851 //
852 // Note: The stackSize field is only present starting in 1.4.
854 int java_lang_Thread::_name_offset = 0;
855 int java_lang_Thread::_group_offset = 0;
856 int java_lang_Thread::_contextClassLoader_offset = 0;
857 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
858 int java_lang_Thread::_priority_offset = 0;
859 int java_lang_Thread::_eetop_offset = 0;
860 int java_lang_Thread::_daemon_offset = 0;
861 int java_lang_Thread::_stillborn_offset = 0;
862 int java_lang_Thread::_stackSize_offset = 0;
863 int java_lang_Thread::_tid_offset = 0;
864 int java_lang_Thread::_thread_status_offset = 0;
865 int java_lang_Thread::_park_blocker_offset = 0;
866 int java_lang_Thread::_park_event_offset = 0 ;
869 void java_lang_Thread::compute_offsets() {
870 assert(_group_offset == 0, "offsets should be initialized only once");
872 Klass* k = SystemDictionary::Thread_klass();
873 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature());
874 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
875 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
876 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
877 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
878 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
879 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
880 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
881 // The stackSize field is only present starting in 1.4, so don't go fatal.
882 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
883 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
884 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
885 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
886 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
887 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
888 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
889 vmSymbols::long_signature());
890 }
893 JavaThread* java_lang_Thread::thread(oop java_thread) {
894 return (JavaThread*)java_thread->address_field(_eetop_offset);
895 }
898 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
899 java_thread->address_field_put(_eetop_offset, (address)thread);
900 }
903 typeArrayOop java_lang_Thread::name(oop java_thread) {
904 oop name = java_thread->obj_field(_name_offset);
905 assert(name == NULL || (name->is_typeArray() && TypeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking");
906 return typeArrayOop(name);
907 }
910 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) {
911 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL");
912 java_thread->obj_field_put(_name_offset, name);
913 }
916 ThreadPriority java_lang_Thread::priority(oop java_thread) {
917 return (ThreadPriority)java_thread->int_field(_priority_offset);
918 }
921 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
922 java_thread->int_field_put(_priority_offset, priority);
923 }
926 oop java_lang_Thread::threadGroup(oop java_thread) {
927 return java_thread->obj_field(_group_offset);
928 }
931 bool java_lang_Thread::is_stillborn(oop java_thread) {
932 return java_thread->bool_field(_stillborn_offset) != 0;
933 }
936 // We never have reason to turn the stillborn bit off
937 void java_lang_Thread::set_stillborn(oop java_thread) {
938 java_thread->bool_field_put(_stillborn_offset, true);
939 }
942 bool java_lang_Thread::is_alive(oop java_thread) {
943 JavaThread* thr = java_lang_Thread::thread(java_thread);
944 return (thr != NULL);
945 }
948 bool java_lang_Thread::is_daemon(oop java_thread) {
949 return java_thread->bool_field(_daemon_offset) != 0;
950 }
953 void java_lang_Thread::set_daemon(oop java_thread) {
954 java_thread->bool_field_put(_daemon_offset, true);
955 }
957 oop java_lang_Thread::context_class_loader(oop java_thread) {
958 return java_thread->obj_field(_contextClassLoader_offset);
959 }
961 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
962 return java_thread->obj_field(_inheritedAccessControlContext_offset);
963 }
966 jlong java_lang_Thread::stackSize(oop java_thread) {
967 // The stackSize field is only present starting in 1.4
968 if (_stackSize_offset > 0) {
969 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check");
970 return java_thread->long_field(_stackSize_offset);
971 } else {
972 return 0;
973 }
974 }
976 // Write the thread status value to threadStatus field in java.lang.Thread java class.
977 void java_lang_Thread::set_thread_status(oop java_thread,
978 java_lang_Thread::ThreadStatus status) {
979 // The threadStatus is only present starting in 1.5
980 if (_thread_status_offset > 0) {
981 java_thread->int_field_put(_thread_status_offset, status);
982 }
983 }
985 // Read thread status value from threadStatus field in java.lang.Thread java class.
986 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
987 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() ||
988 JavaThread::current()->thread_state() == _thread_in_vm,
989 "Java Thread is not running in vm");
990 // The threadStatus is only present starting in 1.5
991 if (_thread_status_offset > 0) {
992 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
993 } else {
994 // All we can easily figure out is if it is alive, but that is
995 // enough info for a valid unknown status.
996 // These aren't restricted to valid set ThreadStatus values, so
997 // use JVMTI values and cast.
998 JavaThread* thr = java_lang_Thread::thread(java_thread);
999 if (thr == NULL) {
1000 // the thread hasn't run yet or is in the process of exiting
1001 return NEW;
1002 }
1003 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1004 }
1005 }
1008 jlong java_lang_Thread::thread_id(oop java_thread) {
1009 // The thread ID field is only present starting in 1.5
1010 if (_tid_offset > 0) {
1011 return java_thread->long_field(_tid_offset);
1012 } else {
1013 return 0;
1014 }
1015 }
1017 oop java_lang_Thread::park_blocker(oop java_thread) {
1018 assert(JDK_Version::current().supports_thread_park_blocker() &&
1019 _park_blocker_offset != 0, "Must support parkBlocker field");
1021 if (_park_blocker_offset > 0) {
1022 return java_thread->obj_field(_park_blocker_offset);
1023 }
1025 return NULL;
1026 }
1028 jlong java_lang_Thread::park_event(oop java_thread) {
1029 if (_park_event_offset > 0) {
1030 return java_thread->long_field(_park_event_offset);
1031 }
1032 return 0;
1033 }
1035 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1036 if (_park_event_offset > 0) {
1037 java_thread->long_field_put(_park_event_offset, ptr);
1038 return true;
1039 }
1040 return false;
1041 }
1044 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1045 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status");
1046 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1047 switch (status) {
1048 case NEW : return "NEW";
1049 case RUNNABLE : return "RUNNABLE";
1050 case SLEEPING : return "TIMED_WAITING (sleeping)";
1051 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1052 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1053 case PARKED : return "WAITING (parking)";
1054 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1055 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1056 case TERMINATED : return "TERMINATED";
1057 default : return "UNKNOWN";
1058 };
1059 }
1060 int java_lang_ThreadGroup::_parent_offset = 0;
1061 int java_lang_ThreadGroup::_name_offset = 0;
1062 int java_lang_ThreadGroup::_threads_offset = 0;
1063 int java_lang_ThreadGroup::_groups_offset = 0;
1064 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1065 int java_lang_ThreadGroup::_destroyed_offset = 0;
1066 int java_lang_ThreadGroup::_daemon_offset = 0;
1067 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
1068 int java_lang_ThreadGroup::_nthreads_offset = 0;
1069 int java_lang_ThreadGroup::_ngroups_offset = 0;
1071 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1072 assert(java_thread_group->is_oop(), "thread group must be oop");
1073 return java_thread_group->obj_field(_parent_offset);
1074 }
1076 // ("name as oop" accessor is not necessary)
1078 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
1079 oop name = java_thread_group->obj_field(_name_offset);
1080 // ThreadGroup.name can be null
1081 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
1082 }
1084 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1085 assert(java_thread_group->is_oop(), "thread group must be oop");
1086 return java_thread_group->int_field(_nthreads_offset);
1087 }
1089 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1090 oop threads = java_thread_group->obj_field(_threads_offset);
1091 assert(threads != NULL, "threadgroups should have threads");
1092 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1093 return objArrayOop(threads);
1094 }
1096 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1097 assert(java_thread_group->is_oop(), "thread group must be oop");
1098 return java_thread_group->int_field(_ngroups_offset);
1099 }
1101 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1102 oop groups = java_thread_group->obj_field(_groups_offset);
1103 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1104 return objArrayOop(groups);
1105 }
1107 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1108 assert(java_thread_group->is_oop(), "thread group must be oop");
1109 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1110 }
1112 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1113 assert(java_thread_group->is_oop(), "thread group must be oop");
1114 return java_thread_group->bool_field(_destroyed_offset) != 0;
1115 }
1117 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1118 assert(java_thread_group->is_oop(), "thread group must be oop");
1119 return java_thread_group->bool_field(_daemon_offset) != 0;
1120 }
1122 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1123 assert(java_thread_group->is_oop(), "thread group must be oop");
1124 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1125 }
1127 void java_lang_ThreadGroup::compute_offsets() {
1128 assert(_parent_offset == 0, "offsets should be initialized only once");
1130 Klass* k = SystemDictionary::ThreadGroup_klass();
1132 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1133 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1134 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1135 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1136 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1137 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1138 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1139 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1140 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1141 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1142 }
1144 oop java_lang_Throwable::unassigned_stacktrace() {
1145 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass());
1146 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1147 if (UseCompressedOops) {
1148 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1149 } else {
1150 return oopDesc::load_decode_heap_oop((oop*)addr);
1151 }
1152 }
1154 oop java_lang_Throwable::backtrace(oop throwable) {
1155 return throwable->obj_field_acquire(backtrace_offset);
1156 }
1159 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1160 throwable->release_obj_field_put(backtrace_offset, value);
1161 }
1164 oop java_lang_Throwable::message(oop throwable) {
1165 return throwable->obj_field(detailMessage_offset);
1166 }
1169 oop java_lang_Throwable::message(Handle throwable) {
1170 return throwable->obj_field(detailMessage_offset);
1171 }
1174 void java_lang_Throwable::set_message(oop throwable, oop value) {
1175 throwable->obj_field_put(detailMessage_offset, value);
1176 }
1179 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1180 throwable->obj_field_put(stackTrace_offset, st_element_array);
1181 }
1183 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1184 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1185 set_stacktrace(throwable, NULL);
1186 }
1189 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1190 ResourceMark rm;
1191 Klass* k = throwable->klass();
1192 assert(k != NULL, "just checking");
1193 st->print("%s", InstanceKlass::cast(k)->external_name());
1194 oop msg = message(throwable);
1195 if (msg != NULL) {
1196 st->print(": %s", java_lang_String::as_utf8_string(msg));
1197 }
1198 }
1201 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1202 ResourceMark rm;
1203 Klass* k = throwable->klass();
1204 assert(k != NULL, "just checking");
1205 st->print("%s", InstanceKlass::cast(k)->external_name());
1206 oop msg = message(throwable);
1207 if (msg != NULL) {
1208 st->print(": %s", java_lang_String::as_utf8_string(msg));
1209 }
1210 }
1212 // After this many redefines, the stack trace is unreliable.
1213 const int MAX_VERSION = USHRT_MAX;
1215 // Helper backtrace functions to store bci|version together.
1216 static inline int merge_bci_and_version(int bci, int version) {
1217 // only store u2 for version, checking for overflow.
1218 if (version > USHRT_MAX || version < 0) version = MAX_VERSION;
1219 assert((jushort)bci == bci, "bci should be short");
1220 return build_int_from_shorts(version, bci);
1221 }
1223 static inline int bci_at(unsigned int merged) {
1224 return extract_high_short_from_int(merged);
1225 }
1226 static inline int version_at(unsigned int merged) {
1227 return extract_low_short_from_int(merged);
1228 }
1230 static inline bool version_matches(Method* method, int version) {
1231 return (method->constants()->version() == version && version < MAX_VERSION);
1232 }
1234 static inline int get_line_number(Method* method, int bci) {
1235 int line_number = 0;
1236 if (method->is_native()) {
1237 // Negative value different from -1 below, enabling Java code in
1238 // class java.lang.StackTraceElement to distinguish "native" from
1239 // "no LineNumberTable". JDK tests for -2.
1240 line_number = -2;
1241 } else {
1242 // Returns -1 if no LineNumberTable, and otherwise actual line number
1243 line_number = method->line_number_from_bci(bci);
1244 if (line_number == -1 && ShowHiddenFrames) {
1245 line_number = bci + 1000000;
1246 }
1247 }
1248 return line_number;
1249 }
1251 // This class provides a simple wrapper over the internal structure of
1252 // exception backtrace to insulate users of the backtrace from needing
1253 // to know what it looks like.
1254 class BacktraceBuilder: public StackObj {
1255 private:
1256 Handle _backtrace;
1257 objArrayOop _head;
1258 typeArrayOop _methods;
1259 typeArrayOop _bcis;
1260 objArrayOop _mirrors;
1261 int _index;
1262 No_Safepoint_Verifier _nsv;
1264 public:
1266 enum {
1267 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1268 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1269 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1270 trace_next_offset = java_lang_Throwable::trace_next_offset,
1271 trace_size = java_lang_Throwable::trace_size,
1272 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1273 };
1275 // get info out of chunks
1276 static typeArrayOop get_methods(objArrayHandle chunk) {
1277 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1278 assert(methods != NULL, "method array should be initialized in backtrace");
1279 return methods;
1280 }
1281 static typeArrayOop get_bcis(objArrayHandle chunk) {
1282 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1283 assert(bcis != NULL, "bci array should be initialized in backtrace");
1284 return bcis;
1285 }
1286 static objArrayOop get_mirrors(objArrayHandle chunk) {
1287 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1288 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1289 return mirrors;
1290 }
1292 // constructor for new backtrace
1293 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL) {
1294 expand(CHECK);
1295 _backtrace = _head;
1296 _index = 0;
1297 }
1299 BacktraceBuilder(objArrayHandle backtrace) {
1300 _methods = get_methods(backtrace);
1301 _bcis = get_bcis(backtrace);
1302 _mirrors = get_mirrors(backtrace);
1303 assert(_methods->length() == _bcis->length() &&
1304 _methods->length() == _mirrors->length(),
1305 "method and source information arrays should match");
1307 // head is the preallocated backtrace
1308 _backtrace = _head = backtrace();
1309 _index = 0;
1310 }
1312 void expand(TRAPS) {
1313 objArrayHandle old_head(THREAD, _head);
1314 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1316 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1317 objArrayHandle new_head(THREAD, head);
1319 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1320 typeArrayHandle new_methods(THREAD, methods);
1322 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1323 typeArrayHandle new_bcis(THREAD, bcis);
1325 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1326 objArrayHandle new_mirrors(THREAD, mirrors);
1328 if (!old_head.is_null()) {
1329 old_head->obj_at_put(trace_next_offset, new_head());
1330 }
1331 new_head->obj_at_put(trace_methods_offset, new_methods());
1332 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1333 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1335 _head = new_head();
1336 _methods = new_methods();
1337 _bcis = new_bcis();
1338 _mirrors = new_mirrors();
1339 _index = 0;
1340 }
1342 oop backtrace() {
1343 return _backtrace();
1344 }
1346 inline void push(Method* method, int bci, TRAPS) {
1347 // Smear the -1 bci to 0 since the array only holds unsigned
1348 // shorts. The later line number lookup would just smear the -1
1349 // to a 0 even if it could be recorded.
1350 if (bci == SynchronizationEntryBCI) bci = 0;
1352 if (_index >= trace_chunk_size) {
1353 methodHandle mhandle(THREAD, method);
1354 expand(CHECK);
1355 method = mhandle();
1356 }
1358 _methods->short_at_put(_index, method->method_idnum());
1359 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version()));
1361 // We need to save the mirrors in the backtrace to keep the class
1362 // from being unloaded while we still have this stack trace.
1363 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1364 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1365 _index++;
1366 }
1368 };
1370 // Print stack trace element to resource allocated buffer
1371 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
1372 int method_id, int version, int bci) {
1374 // Get strings and string lengths
1375 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1376 const char* klass_name = holder->external_name();
1377 int buf_len = (int)strlen(klass_name);
1379 // pushing to the stack trace added one.
1380 Method* method = holder->method_with_idnum(method_id);
1381 char* method_name = method->name()->as_C_string();
1382 buf_len += (int)strlen(method_name);
1384 char* source_file_name = NULL;
1385 if (version_matches(method, version)) {
1386 Symbol* source = holder->source_file_name();
1387 if (source != NULL) {
1388 source_file_name = source->as_C_string();
1389 buf_len += (int)strlen(source_file_name);
1390 }
1391 }
1393 // Allocate temporary buffer with extra space for formatting and line number
1394 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1396 // Print stack trace line in buffer
1397 sprintf(buf, "\tat %s.%s", klass_name, method_name);
1399 if (!version_matches(method, version)) {
1400 strcat(buf, "(Redefined)");
1401 } else {
1402 int line_number = get_line_number(method, bci);
1403 if (line_number == -2) {
1404 strcat(buf, "(Native Method)");
1405 } else {
1406 if (source_file_name != NULL && (line_number != -1)) {
1407 // Sourcename and linenumber
1408 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1409 } else if (source_file_name != NULL) {
1410 // Just sourcename
1411 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1412 } else {
1413 // Neither sourcename nor linenumber
1414 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1415 }
1416 nmethod* nm = method->code();
1417 if (WizardMode && nm != NULL) {
1418 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1419 }
1420 }
1421 }
1423 return buf;
1424 }
1426 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror,
1427 int method_id, int version, int bci) {
1428 ResourceMark rm;
1429 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci);
1430 st->print_cr("%s", buf);
1431 }
1433 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) {
1434 Handle mirror = method->method_holder()->java_mirror();
1435 int method_id = method->method_idnum();
1436 int version = method->constants()->version();
1437 print_stack_element(st, mirror, method_id, version, bci);
1438 }
1440 const char* java_lang_Throwable::no_stack_trace_message() {
1441 return "\t<<no stack trace available>>";
1442 }
1445 // Currently used only for exceptions occurring during startup
1446 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1447 Thread *THREAD = Thread::current();
1448 Handle h_throwable(THREAD, throwable);
1449 while (h_throwable.not_null()) {
1450 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1451 if (result.is_null()) {
1452 st->print_cr(no_stack_trace_message());
1453 return;
1454 }
1456 while (result.not_null()) {
1458 // Get method id, bci, version and mirror from chunk
1459 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result));
1460 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result));
1461 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result));
1463 int length = methods()->length();
1464 for (int index = 0; index < length; index++) {
1465 Handle mirror(THREAD, mirrors->obj_at(index));
1466 // NULL mirror means end of stack trace
1467 if (mirror.is_null()) goto handle_cause;
1468 int method = methods->short_at(index);
1469 int version = version_at(bcis->int_at(index));
1470 int bci = bci_at(bcis->int_at(index));
1471 print_stack_element(st, mirror, method, version, bci);
1472 }
1473 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1474 }
1475 handle_cause:
1476 {
1477 EXCEPTION_MARK;
1478 JavaValue cause(T_OBJECT);
1479 JavaCalls::call_virtual(&cause,
1480 h_throwable,
1481 KlassHandle(THREAD, h_throwable->klass()),
1482 vmSymbols::getCause_name(),
1483 vmSymbols::void_throwable_signature(),
1484 THREAD);
1485 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1486 if (HAS_PENDING_EXCEPTION) {
1487 CLEAR_PENDING_EXCEPTION;
1488 h_throwable = Handle();
1489 } else {
1490 h_throwable = Handle(THREAD, (oop) cause.get_jobject());
1491 if (h_throwable.not_null()) {
1492 st->print("Caused by: ");
1493 print(h_throwable, st);
1494 st->cr();
1495 }
1496 }
1497 }
1498 }
1499 }
1501 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) {
1502 if (!StackTraceInThrowable) return;
1503 ResourceMark rm(THREAD);
1505 // Start out by clearing the backtrace for this object, in case the VM
1506 // runs out of memory while allocating the stack trace
1507 set_backtrace(throwable(), NULL);
1508 if (JDK_Version::is_gte_jdk14x_version()) {
1509 // New since 1.4, clear lazily constructed Java level stacktrace if
1510 // refilling occurs
1511 // This is unnecessary in 1.7+ but harmless
1512 clear_stacktrace(throwable());
1513 }
1515 int max_depth = MaxJavaStackTraceDepth;
1516 JavaThread* thread = (JavaThread*)THREAD;
1517 BacktraceBuilder bt(CHECK);
1519 // If there is no Java frame just return the method that was being called
1520 // with bci 0
1521 if (!thread->has_last_Java_frame()) {
1522 if (max_depth >= 1 && method() != NULL) {
1523 bt.push(method(), 0, CHECK);
1524 set_backtrace(throwable(), bt.backtrace());
1525 }
1526 return;
1527 }
1529 // Instead of using vframe directly, this version of fill_in_stack_trace
1530 // basically handles everything by hand. This significantly improved the
1531 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1532 // See bug 6333838 for more details.
1533 // The "ASSERT" here is to verify this method generates the exactly same stack
1534 // trace as utilizing vframe.
1535 #ifdef ASSERT
1536 vframeStream st(thread);
1537 methodHandle st_method(THREAD, st.method());
1538 #endif
1539 int total_count = 0;
1540 RegisterMap map(thread, false);
1541 int decode_offset = 0;
1542 nmethod* nm = NULL;
1543 bool skip_fillInStackTrace_check = false;
1544 bool skip_throwableInit_check = false;
1545 bool skip_hidden = !ShowHiddenFrames;
1547 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1548 Method* method = NULL;
1549 int bci = 0;
1551 // Compiled java method case.
1552 if (decode_offset != 0) {
1553 DebugInfoReadStream stream(nm, decode_offset);
1554 decode_offset = stream.read_int();
1555 method = (Method*)nm->metadata_at(stream.read_int());
1556 bci = stream.read_bci();
1557 } else {
1558 if (fr.is_first_frame()) break;
1559 address pc = fr.pc();
1560 if (fr.is_interpreted_frame()) {
1561 intptr_t bcx = fr.interpreter_frame_bcx();
1562 method = fr.interpreter_frame_method();
1563 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
1564 fr = fr.sender(&map);
1565 } else {
1566 CodeBlob* cb = fr.cb();
1567 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1568 // but non nmethod
1569 fr = fr.sender(&map);
1570 if (cb == NULL || !cb->is_nmethod()) {
1571 continue;
1572 }
1573 nm = (nmethod*)cb;
1574 if (nm->method()->is_native()) {
1575 method = nm->method();
1576 bci = 0;
1577 } else {
1578 PcDesc* pd = nm->pc_desc_at(pc);
1579 decode_offset = pd->scope_decode_offset();
1580 // if decode_offset is not equal to 0, it will execute the
1581 // "compiled java method case" at the beginning of the loop.
1582 continue;
1583 }
1584 }
1585 }
1586 #ifdef ASSERT
1587 assert(st_method() == method && st.bci() == bci,
1588 "Wrong stack trace");
1589 st.next();
1590 // vframeStream::method isn't GC-safe so store off a copy
1591 // of the Method* in case we GC.
1592 if (!st.at_end()) {
1593 st_method = st.method();
1594 }
1595 #endif
1597 // the format of the stacktrace will be:
1598 // - 1 or more fillInStackTrace frames for the exception class (skipped)
1599 // - 0 or more <init> methods for the exception class (skipped)
1600 // - rest of the stack
1602 if (!skip_fillInStackTrace_check) {
1603 if ((method->name() == vmSymbols::fillInStackTrace_name() ||
1604 method->name() == vmSymbols::fillInStackTrace0_name()) &&
1605 throwable->is_a(method->method_holder())) {
1606 continue;
1607 }
1608 else {
1609 skip_fillInStackTrace_check = true; // gone past them all
1610 }
1611 }
1612 if (!skip_throwableInit_check) {
1613 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1615 // skip <init> methods of the exception class and superclasses
1616 // This is simlar to classic VM.
1617 if (method->name() == vmSymbols::object_initializer_name() &&
1618 throwable->is_a(method->method_holder())) {
1619 continue;
1620 } else {
1621 // there are none or we've seen them all - either way stop checking
1622 skip_throwableInit_check = true;
1623 }
1624 }
1625 if (method->is_hidden()) {
1626 if (skip_hidden) continue;
1627 }
1628 bt.push(method, bci, CHECK);
1629 total_count++;
1630 }
1632 // Put completed stack trace into throwable object
1633 set_backtrace(throwable(), bt.backtrace());
1634 }
1636 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) {
1637 // No-op if stack trace is disabled
1638 if (!StackTraceInThrowable) {
1639 return;
1640 }
1642 // Disable stack traces for some preallocated out of memory errors
1643 if (!Universe::should_fill_in_stack_trace(throwable)) {
1644 return;
1645 }
1647 PRESERVE_EXCEPTION_MARK;
1649 JavaThread* thread = JavaThread::active();
1650 fill_in_stack_trace(throwable, method, thread);
1651 // ignore exceptions thrown during stack trace filling
1652 CLEAR_PENDING_EXCEPTION;
1653 }
1655 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1656 // Allocate stack trace - backtrace is created but not filled in
1658 // No-op if stack trace is disabled
1659 if (!StackTraceInThrowable) return;
1660 BacktraceBuilder bt(CHECK); // creates a backtrace
1661 set_backtrace(throwable(), bt.backtrace());
1662 }
1665 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1666 // Fill in stack trace into preallocated backtrace (no GC)
1668 // No-op if stack trace is disabled
1669 if (!StackTraceInThrowable) return;
1671 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1673 JavaThread* THREAD = JavaThread::current();
1675 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
1676 assert(backtrace.not_null(), "backtrace should have been preallocated");
1678 ResourceMark rm(THREAD);
1679 vframeStream st(THREAD);
1681 BacktraceBuilder bt(backtrace);
1683 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1684 // methods as preallocated errors aren't created by "java" code.
1686 // fill in as much stack trace as possible
1687 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace);
1688 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1689 int chunk_count = 0;
1691 for (;!st.at_end(); st.next()) {
1692 bt.push(st.method(), st.bci(), CHECK);
1693 chunk_count++;
1695 // Bail-out for deep stacks
1696 if (chunk_count >= max_chunks) break;
1697 }
1699 // For Java 7+ we support the Throwable immutability protocol defined for Java 7. This support
1700 // was missing in 7u0 so in 7u0 there is a workaround in the Throwable class. That workaround
1701 // can be removed in a JDK using this JVM version
1702 if (JDK_Version::is_gte_jdk17x_version()) {
1703 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
1704 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
1705 }
1706 }
1709 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1710 if (throwable == NULL) {
1711 THROW_0(vmSymbols::java_lang_NullPointerException());
1712 }
1713 objArrayOop chunk = objArrayOop(backtrace(throwable));
1714 int depth = 0;
1715 if (chunk != NULL) {
1716 // Iterate over chunks and count full ones
1717 while (true) {
1718 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1719 if (next == NULL) break;
1720 depth += trace_chunk_size;
1721 chunk = next;
1722 }
1723 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1724 // Count element in remaining partial chunk. NULL value for mirror
1725 // marks the end of the stack trace elements that are saved.
1726 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1727 assert(mirrors != NULL, "sanity check");
1728 for (int i = 0; i < mirrors->length(); i++) {
1729 if (mirrors->obj_at(i) == NULL) break;
1730 depth++;
1731 }
1732 }
1733 return depth;
1734 }
1737 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1738 if (throwable == NULL) {
1739 THROW_0(vmSymbols::java_lang_NullPointerException());
1740 }
1741 if (index < 0) {
1742 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1743 }
1744 // Compute how many chunks to skip and index into actual chunk
1745 objArrayOop chunk = objArrayOop(backtrace(throwable));
1746 int skip_chunks = index / trace_chunk_size;
1747 int chunk_index = index % trace_chunk_size;
1748 while (chunk != NULL && skip_chunks > 0) {
1749 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1750 skip_chunks--;
1751 }
1752 if (chunk == NULL) {
1753 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1754 }
1755 // Get method id, bci, version and mirror from chunk
1756 typeArrayOop methods = BacktraceBuilder::get_methods(chunk);
1757 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk);
1758 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1760 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check");
1762 int method = methods->short_at(chunk_index);
1763 int version = version_at(bcis->int_at(chunk_index));
1764 int bci = bci_at(bcis->int_at(chunk_index));
1765 Handle mirror(THREAD, mirrors->obj_at(chunk_index));
1767 // Chunk can be partial full
1768 if (mirror.is_null()) {
1769 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1770 }
1772 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, CHECK_0);
1773 return element;
1774 }
1776 oop java_lang_StackTraceElement::create(Handle mirror, int method_id, int version, int bci, TRAPS) {
1777 // Allocate java.lang.StackTraceElement instance
1778 Klass* k = SystemDictionary::StackTraceElement_klass();
1779 assert(k != NULL, "must be loaded in 1.4+");
1780 instanceKlassHandle ik (THREAD, k);
1781 if (ik->should_be_initialized()) {
1782 ik->initialize(CHECK_0);
1783 }
1785 Handle element = ik->allocate_instance_handle(CHECK_0);
1786 // Fill in class name
1787 ResourceMark rm(THREAD);
1788 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1789 const char* str = holder->external_name();
1790 oop classname = StringTable::intern((char*) str, CHECK_0);
1791 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1793 // Fill in method name
1794 Method* method = holder->method_with_idnum(method_id);
1795 oop methodname = StringTable::intern(method->name(), CHECK_0);
1796 java_lang_StackTraceElement::set_methodName(element(), methodname);
1798 if (!version_matches(method, version)) {
1799 // The method was redefined, accurate line number information isn't available
1800 java_lang_StackTraceElement::set_fileName(element(), NULL);
1801 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1802 } else {
1803 // Fill in source file name and line number.
1804 Symbol* source = holder->source_file_name();
1805 if (ShowHiddenFrames && source == NULL)
1806 source = vmSymbols::unknown_class_name();
1807 oop filename = StringTable::intern(source, CHECK_0);
1808 java_lang_StackTraceElement::set_fileName(element(), filename);
1810 int line_number = get_line_number(method, bci);
1811 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1812 }
1813 return element();
1814 }
1816 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1817 Handle mirror (THREAD, method->method_holder()->java_mirror());
1818 int method_id = method->method_idnum();
1819 return create(mirror, method_id, method->constants()->version(), bci, THREAD);
1820 }
1822 void java_lang_reflect_AccessibleObject::compute_offsets() {
1823 Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
1824 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1825 }
1827 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1828 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1829 return (jboolean) reflect->bool_field(override_offset);
1830 }
1832 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1833 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1834 reflect->bool_field_put(override_offset, (int) value);
1835 }
1837 void java_lang_reflect_Method::compute_offsets() {
1838 Klass* k = SystemDictionary::reflect_Method_klass();
1839 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1840 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1841 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1842 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1843 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1844 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1845 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1846 // The generic signature and annotations fields are only present in 1.5
1847 signature_offset = -1;
1848 annotations_offset = -1;
1849 parameter_annotations_offset = -1;
1850 annotation_default_offset = -1;
1851 type_annotations_offset = -1;
1852 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1853 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1854 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1855 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1856 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
1857 }
1859 Handle java_lang_reflect_Method::create(TRAPS) {
1860 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1861 Klass* klass = SystemDictionary::reflect_Method_klass();
1862 // This class is eagerly initialized during VM initialization, since we keep a refence
1863 // to one of the methods
1864 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
1865 return InstanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH);
1866 }
1868 oop java_lang_reflect_Method::clazz(oop reflect) {
1869 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1870 return reflect->obj_field(clazz_offset);
1871 }
1873 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1874 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1875 reflect->obj_field_put(clazz_offset, value);
1876 }
1878 int java_lang_reflect_Method::slot(oop reflect) {
1879 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1880 return reflect->int_field(slot_offset);
1881 }
1883 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1884 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1885 reflect->int_field_put(slot_offset, value);
1886 }
1888 oop java_lang_reflect_Method::name(oop method) {
1889 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1890 return method->obj_field(name_offset);
1891 }
1893 void java_lang_reflect_Method::set_name(oop method, oop value) {
1894 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1895 method->obj_field_put(name_offset, value);
1896 }
1898 oop java_lang_reflect_Method::return_type(oop method) {
1899 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1900 return method->obj_field(returnType_offset);
1901 }
1903 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
1904 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1905 method->obj_field_put(returnType_offset, value);
1906 }
1908 oop java_lang_reflect_Method::parameter_types(oop method) {
1909 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1910 return method->obj_field(parameterTypes_offset);
1911 }
1913 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
1914 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1915 method->obj_field_put(parameterTypes_offset, value);
1916 }
1918 oop java_lang_reflect_Method::exception_types(oop method) {
1919 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1920 return method->obj_field(exceptionTypes_offset);
1921 }
1923 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
1924 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1925 method->obj_field_put(exceptionTypes_offset, value);
1926 }
1928 int java_lang_reflect_Method::modifiers(oop method) {
1929 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1930 return method->int_field(modifiers_offset);
1931 }
1933 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
1934 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1935 method->int_field_put(modifiers_offset, value);
1936 }
1938 bool java_lang_reflect_Method::has_signature_field() {
1939 return (signature_offset >= 0);
1940 }
1942 oop java_lang_reflect_Method::signature(oop method) {
1943 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1944 assert(has_signature_field(), "signature field must be present");
1945 return method->obj_field(signature_offset);
1946 }
1948 void java_lang_reflect_Method::set_signature(oop method, oop value) {
1949 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1950 assert(has_signature_field(), "signature field must be present");
1951 method->obj_field_put(signature_offset, value);
1952 }
1954 bool java_lang_reflect_Method::has_annotations_field() {
1955 return (annotations_offset >= 0);
1956 }
1958 oop java_lang_reflect_Method::annotations(oop method) {
1959 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1960 assert(has_annotations_field(), "annotations field must be present");
1961 return method->obj_field(annotations_offset);
1962 }
1964 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
1965 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1966 assert(has_annotations_field(), "annotations field must be present");
1967 method->obj_field_put(annotations_offset, value);
1968 }
1970 bool java_lang_reflect_Method::has_parameter_annotations_field() {
1971 return (parameter_annotations_offset >= 0);
1972 }
1974 oop java_lang_reflect_Method::parameter_annotations(oop method) {
1975 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1976 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1977 return method->obj_field(parameter_annotations_offset);
1978 }
1980 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
1981 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1982 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1983 method->obj_field_put(parameter_annotations_offset, value);
1984 }
1986 bool java_lang_reflect_Method::has_annotation_default_field() {
1987 return (annotation_default_offset >= 0);
1988 }
1990 oop java_lang_reflect_Method::annotation_default(oop method) {
1991 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1992 assert(has_annotation_default_field(), "annotation default field must be present");
1993 return method->obj_field(annotation_default_offset);
1994 }
1996 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
1997 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1998 assert(has_annotation_default_field(), "annotation default field must be present");
1999 method->obj_field_put(annotation_default_offset, value);
2000 }
2002 bool java_lang_reflect_Method::has_type_annotations_field() {
2003 return (type_annotations_offset >= 0);
2004 }
2006 oop java_lang_reflect_Method::type_annotations(oop method) {
2007 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2008 assert(has_type_annotations_field(), "type_annotations field must be present");
2009 return method->obj_field(type_annotations_offset);
2010 }
2012 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2013 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2014 assert(has_type_annotations_field(), "type_annotations field must be present");
2015 method->obj_field_put(type_annotations_offset, value);
2016 }
2018 void java_lang_reflect_Constructor::compute_offsets() {
2019 Klass* k = SystemDictionary::reflect_Constructor_klass();
2020 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2021 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2022 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2023 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2024 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2025 // The generic signature and annotations fields are only present in 1.5
2026 signature_offset = -1;
2027 annotations_offset = -1;
2028 parameter_annotations_offset = -1;
2029 type_annotations_offset = -1;
2030 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2031 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2032 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2033 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2034 }
2036 Handle java_lang_reflect_Constructor::create(TRAPS) {
2037 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2038 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2039 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2040 instanceKlassHandle klass (THREAD, k);
2041 // Ensure it is initialized
2042 klass->initialize(CHECK_NH);
2043 return klass->allocate_instance_handle(CHECK_NH);
2044 }
2046 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2047 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2048 return reflect->obj_field(clazz_offset);
2049 }
2051 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2052 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2053 reflect->obj_field_put(clazz_offset, value);
2054 }
2056 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2057 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2058 return constructor->obj_field(parameterTypes_offset);
2059 }
2061 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2062 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2063 constructor->obj_field_put(parameterTypes_offset, value);
2064 }
2066 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2067 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2068 return constructor->obj_field(exceptionTypes_offset);
2069 }
2071 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2072 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2073 constructor->obj_field_put(exceptionTypes_offset, value);
2074 }
2076 int java_lang_reflect_Constructor::slot(oop reflect) {
2077 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2078 return reflect->int_field(slot_offset);
2079 }
2081 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2082 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2083 reflect->int_field_put(slot_offset, value);
2084 }
2086 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2087 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2088 return constructor->int_field(modifiers_offset);
2089 }
2091 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2092 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2093 constructor->int_field_put(modifiers_offset, value);
2094 }
2096 bool java_lang_reflect_Constructor::has_signature_field() {
2097 return (signature_offset >= 0);
2098 }
2100 oop java_lang_reflect_Constructor::signature(oop constructor) {
2101 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2102 assert(has_signature_field(), "signature field must be present");
2103 return constructor->obj_field(signature_offset);
2104 }
2106 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2107 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2108 assert(has_signature_field(), "signature field must be present");
2109 constructor->obj_field_put(signature_offset, value);
2110 }
2112 bool java_lang_reflect_Constructor::has_annotations_field() {
2113 return (annotations_offset >= 0);
2114 }
2116 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2117 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2118 assert(has_annotations_field(), "annotations field must be present");
2119 return constructor->obj_field(annotations_offset);
2120 }
2122 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2123 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2124 assert(has_annotations_field(), "annotations field must be present");
2125 constructor->obj_field_put(annotations_offset, value);
2126 }
2128 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2129 return (parameter_annotations_offset >= 0);
2130 }
2132 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2133 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2134 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2135 return method->obj_field(parameter_annotations_offset);
2136 }
2138 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2139 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2140 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2141 method->obj_field_put(parameter_annotations_offset, value);
2142 }
2144 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2145 return (type_annotations_offset >= 0);
2146 }
2148 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2149 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2150 assert(has_type_annotations_field(), "type_annotations field must be present");
2151 return constructor->obj_field(type_annotations_offset);
2152 }
2154 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2155 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2156 assert(has_type_annotations_field(), "type_annotations field must be present");
2157 constructor->obj_field_put(type_annotations_offset, value);
2158 }
2160 void java_lang_reflect_Field::compute_offsets() {
2161 Klass* k = SystemDictionary::reflect_Field_klass();
2162 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2163 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2164 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
2165 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2166 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2167 // The generic signature and annotations fields are only present in 1.5
2168 signature_offset = -1;
2169 annotations_offset = -1;
2170 type_annotations_offset = -1;
2171 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2172 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2173 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2174 }
2176 Handle java_lang_reflect_Field::create(TRAPS) {
2177 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2178 Symbol* name = vmSymbols::java_lang_reflect_Field();
2179 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2180 instanceKlassHandle klass (THREAD, k);
2181 // Ensure it is initialized
2182 klass->initialize(CHECK_NH);
2183 return klass->allocate_instance_handle(CHECK_NH);
2184 }
2186 oop java_lang_reflect_Field::clazz(oop reflect) {
2187 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2188 return reflect->obj_field(clazz_offset);
2189 }
2191 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2192 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2193 reflect->obj_field_put(clazz_offset, value);
2194 }
2196 oop java_lang_reflect_Field::name(oop field) {
2197 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2198 return field->obj_field(name_offset);
2199 }
2201 void java_lang_reflect_Field::set_name(oop field, oop value) {
2202 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2203 field->obj_field_put(name_offset, value);
2204 }
2206 oop java_lang_reflect_Field::type(oop field) {
2207 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2208 return field->obj_field(type_offset);
2209 }
2211 void java_lang_reflect_Field::set_type(oop field, oop value) {
2212 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2213 field->obj_field_put(type_offset, value);
2214 }
2216 int java_lang_reflect_Field::slot(oop reflect) {
2217 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2218 return reflect->int_field(slot_offset);
2219 }
2221 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2222 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2223 reflect->int_field_put(slot_offset, value);
2224 }
2226 int java_lang_reflect_Field::modifiers(oop field) {
2227 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2228 return field->int_field(modifiers_offset);
2229 }
2231 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2232 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2233 field->int_field_put(modifiers_offset, value);
2234 }
2236 bool java_lang_reflect_Field::has_signature_field() {
2237 return (signature_offset >= 0);
2238 }
2240 oop java_lang_reflect_Field::signature(oop field) {
2241 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2242 assert(has_signature_field(), "signature field must be present");
2243 return field->obj_field(signature_offset);
2244 }
2246 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2247 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2248 assert(has_signature_field(), "signature field must be present");
2249 field->obj_field_put(signature_offset, value);
2250 }
2252 bool java_lang_reflect_Field::has_annotations_field() {
2253 return (annotations_offset >= 0);
2254 }
2256 oop java_lang_reflect_Field::annotations(oop field) {
2257 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2258 assert(has_annotations_field(), "annotations field must be present");
2259 return field->obj_field(annotations_offset);
2260 }
2262 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2263 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2264 assert(has_annotations_field(), "annotations field must be present");
2265 field->obj_field_put(annotations_offset, value);
2266 }
2268 bool java_lang_reflect_Field::has_type_annotations_field() {
2269 return (type_annotations_offset >= 0);
2270 }
2272 oop java_lang_reflect_Field::type_annotations(oop field) {
2273 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2274 assert(has_type_annotations_field(), "type_annotations field must be present");
2275 return field->obj_field(type_annotations_offset);
2276 }
2278 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2279 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2280 assert(has_type_annotations_field(), "type_annotations field must be present");
2281 field->obj_field_put(type_annotations_offset, value);
2282 }
2284 void sun_reflect_ConstantPool::compute_offsets() {
2285 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2286 // This null test can be removed post beta
2287 if (k != NULL) {
2288 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2289 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2290 }
2291 }
2293 void java_lang_reflect_Parameter::compute_offsets() {
2294 Klass* k = SystemDictionary::reflect_Parameter_klass();
2295 if(NULL != k) {
2296 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2297 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2298 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature());
2299 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature());
2300 }
2301 }
2303 Handle java_lang_reflect_Parameter::create(TRAPS) {
2304 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2305 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2306 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2307 instanceKlassHandle klass (THREAD, k);
2308 // Ensure it is initialized
2309 klass->initialize(CHECK_NH);
2310 return klass->allocate_instance_handle(CHECK_NH);
2311 }
2313 oop java_lang_reflect_Parameter::name(oop param) {
2314 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2315 return param->obj_field(name_offset);
2316 }
2318 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2319 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2320 param->obj_field_put(name_offset, value);
2321 }
2323 int java_lang_reflect_Parameter::modifiers(oop param) {
2324 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2325 return param->int_field(modifiers_offset);
2326 }
2328 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2329 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2330 param->int_field_put(modifiers_offset, value);
2331 }
2333 int java_lang_reflect_Parameter::index(oop param) {
2334 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2335 return param->int_field(index_offset);
2336 }
2338 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2339 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2340 param->int_field_put(index_offset, value);
2341 }
2343 oop java_lang_reflect_Parameter::executable(oop param) {
2344 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2345 return param->obj_field(executable_offset);
2346 }
2348 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2349 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2350 param->obj_field_put(executable_offset, value);
2351 }
2354 Handle sun_reflect_ConstantPool::create(TRAPS) {
2355 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2356 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2357 instanceKlassHandle klass (THREAD, k);
2358 // Ensure it is initialized
2359 klass->initialize(CHECK_NH);
2360 return klass->allocate_instance_handle(CHECK_NH);
2361 }
2364 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2365 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2366 oop mirror = value->pool_holder()->java_mirror();
2367 // Save the mirror to get back the constant pool.
2368 reflect->obj_field_put(_oop_offset, mirror);
2369 }
2371 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) {
2372 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2374 oop mirror = reflect->obj_field(_oop_offset);
2375 Klass* k = java_lang_Class::as_Klass(mirror);
2376 assert(k->oop_is_instance(), "Must be");
2378 // Get the constant pool back from the klass. Since class redefinition
2379 // merges the new constant pool into the old, this is essentially the
2380 // same constant pool as the original. If constant pool merging is
2381 // no longer done in the future, this will have to change to save
2382 // the original.
2383 return InstanceKlass::cast(k)->constants();
2384 }
2386 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2387 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2388 // This null test can be removed post beta
2389 if (k != NULL) {
2390 compute_offset(_base_offset, k,
2391 vmSymbols::base_name(), vmSymbols::object_signature());
2392 }
2393 }
2395 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2396 Klass* k = SystemDictionary::box_klass(type);
2397 if (k == NULL) return NULL;
2398 instanceKlassHandle h (THREAD, k);
2399 if (!h->is_initialized()) h->initialize(CHECK_0);
2400 return h->allocate_instance(THREAD);
2401 }
2404 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2405 oop box = initialize_and_allocate(type, CHECK_0);
2406 if (box == NULL) return NULL;
2407 switch (type) {
2408 case T_BOOLEAN:
2409 box->bool_field_put(value_offset, value->z);
2410 break;
2411 case T_CHAR:
2412 box->char_field_put(value_offset, value->c);
2413 break;
2414 case T_FLOAT:
2415 box->float_field_put(value_offset, value->f);
2416 break;
2417 case T_DOUBLE:
2418 box->double_field_put(long_value_offset, value->d);
2419 break;
2420 case T_BYTE:
2421 box->byte_field_put(value_offset, value->b);
2422 break;
2423 case T_SHORT:
2424 box->short_field_put(value_offset, value->s);
2425 break;
2426 case T_INT:
2427 box->int_field_put(value_offset, value->i);
2428 break;
2429 case T_LONG:
2430 box->long_field_put(long_value_offset, value->j);
2431 break;
2432 default:
2433 return NULL;
2434 }
2435 return box;
2436 }
2439 BasicType java_lang_boxing_object::basic_type(oop box) {
2440 if (box == NULL) return T_ILLEGAL;
2441 BasicType type = SystemDictionary::box_klass_type(box->klass());
2442 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2443 return T_ILLEGAL;
2444 return type;
2445 }
2448 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2449 BasicType type = SystemDictionary::box_klass_type(box->klass());
2450 switch (type) {
2451 case T_BOOLEAN:
2452 value->z = box->bool_field(value_offset);
2453 break;
2454 case T_CHAR:
2455 value->c = box->char_field(value_offset);
2456 break;
2457 case T_FLOAT:
2458 value->f = box->float_field(value_offset);
2459 break;
2460 case T_DOUBLE:
2461 value->d = box->double_field(long_value_offset);
2462 break;
2463 case T_BYTE:
2464 value->b = box->byte_field(value_offset);
2465 break;
2466 case T_SHORT:
2467 value->s = box->short_field(value_offset);
2468 break;
2469 case T_INT:
2470 value->i = box->int_field(value_offset);
2471 break;
2472 case T_LONG:
2473 value->j = box->long_field(long_value_offset);
2474 break;
2475 default:
2476 return T_ILLEGAL;
2477 } // end switch
2478 return type;
2479 }
2482 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2483 BasicType type = SystemDictionary::box_klass_type(box->klass());
2484 switch (type) {
2485 case T_BOOLEAN:
2486 box->bool_field_put(value_offset, value->z);
2487 break;
2488 case T_CHAR:
2489 box->char_field_put(value_offset, value->c);
2490 break;
2491 case T_FLOAT:
2492 box->float_field_put(value_offset, value->f);
2493 break;
2494 case T_DOUBLE:
2495 box->double_field_put(long_value_offset, value->d);
2496 break;
2497 case T_BYTE:
2498 box->byte_field_put(value_offset, value->b);
2499 break;
2500 case T_SHORT:
2501 box->short_field_put(value_offset, value->s);
2502 break;
2503 case T_INT:
2504 box->int_field_put(value_offset, value->i);
2505 break;
2506 case T_LONG:
2507 box->long_field_put(long_value_offset, value->j);
2508 break;
2509 default:
2510 return T_ILLEGAL;
2511 } // end switch
2512 return type;
2513 }
2516 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2517 switch (type) {
2518 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2519 case T_CHAR: st->print("%d", value->c); break;
2520 case T_BYTE: st->print("%d", value->b); break;
2521 case T_SHORT: st->print("%d", value->s); break;
2522 case T_INT: st->print("%d", value->i); break;
2523 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2524 case T_FLOAT: st->print("%f", value->f); break;
2525 case T_DOUBLE: st->print("%lf", value->d); break;
2526 default: st->print("type %d?", type); break;
2527 }
2528 }
2531 // Support for java_lang_ref_Reference
2532 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() {
2533 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2534 address addr = ik->static_field_addr(static_lock_offset);
2535 return (HeapWord*) addr;
2536 }
2538 oop java_lang_ref_Reference::pending_list_lock() {
2539 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2540 address addr = ik->static_field_addr(static_lock_offset);
2541 if (UseCompressedOops) {
2542 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2543 } else {
2544 return oopDesc::load_decode_heap_oop((oop*)addr);
2545 }
2546 }
2548 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2549 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2550 address addr = ik->static_field_addr(static_pending_offset);
2551 // XXX This might not be HeapWord aligned, almost rather be char *.
2552 return (HeapWord*)addr;
2553 }
2555 oop java_lang_ref_Reference::pending_list() {
2556 char *addr = (char *)pending_list_addr();
2557 if (UseCompressedOops) {
2558 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2559 } else {
2560 return oopDesc::load_decode_heap_oop((oop*)addr);
2561 }
2562 }
2565 // Support for java_lang_ref_SoftReference
2567 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2568 return ref->long_field(timestamp_offset);
2569 }
2571 jlong java_lang_ref_SoftReference::clock() {
2572 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2573 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2574 return *offset;
2575 }
2577 void java_lang_ref_SoftReference::set_clock(jlong value) {
2578 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2579 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2580 *offset = value;
2581 }
2583 // Support for java_lang_invoke_DirectMethodHandle
2585 int java_lang_invoke_DirectMethodHandle::_member_offset;
2587 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
2588 oop member_name = NULL;
2589 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
2590 assert(is_dmh, "a DirectMethodHandle oop is expected");
2591 if (is_dmh) {
2592 member_name = dmh->obj_field(member_offset_in_bytes());
2593 }
2594 return member_name;
2595 }
2597 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
2598 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
2599 if (klass_oop != NULL && EnableInvokeDynamic) {
2600 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2601 }
2602 }
2604 // Support for java_lang_invoke_MethodHandle
2606 int java_lang_invoke_MethodHandle::_type_offset;
2607 int java_lang_invoke_MethodHandle::_form_offset;
2609 int java_lang_invoke_MemberName::_clazz_offset;
2610 int java_lang_invoke_MemberName::_name_offset;
2611 int java_lang_invoke_MemberName::_type_offset;
2612 int java_lang_invoke_MemberName::_flags_offset;
2613 int java_lang_invoke_MemberName::_vmtarget_offset;
2614 int java_lang_invoke_MemberName::_vmloader_offset;
2615 int java_lang_invoke_MemberName::_vmindex_offset;
2617 int java_lang_invoke_LambdaForm::_vmentry_offset;
2619 void java_lang_invoke_MethodHandle::compute_offsets() {
2620 Klass* klass_oop = SystemDictionary::MethodHandle_klass();
2621 if (klass_oop != NULL && EnableInvokeDynamic) {
2622 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
2623 compute_optional_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
2624 if (_form_offset == 0) {
2625 EnableInvokeDynamic = false;
2626 }
2627 }
2628 }
2630 void java_lang_invoke_MemberName::compute_offsets() {
2631 Klass* klass_oop = SystemDictionary::MemberName_klass();
2632 if (klass_oop != NULL && EnableInvokeDynamic) {
2633 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature());
2634 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature());
2635 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature());
2636 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature());
2637 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2638 }
2639 }
2641 void java_lang_invoke_LambdaForm::compute_offsets() {
2642 Klass* klass_oop = SystemDictionary::LambdaForm_klass();
2643 if (klass_oop != NULL && EnableInvokeDynamic) {
2644 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2645 }
2646 }
2648 oop java_lang_invoke_MethodHandle::type(oop mh) {
2649 return mh->obj_field(_type_offset);
2650 }
2652 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
2653 mh->obj_field_put(_type_offset, mtype);
2654 }
2656 oop java_lang_invoke_MethodHandle::form(oop mh) {
2657 assert(_form_offset != 0, "");
2658 return mh->obj_field(_form_offset);
2659 }
2661 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
2662 assert(_form_offset != 0, "");
2663 mh->obj_field_put(_form_offset, lform);
2664 }
2666 /// MemberName accessors
2668 oop java_lang_invoke_MemberName::clazz(oop mname) {
2669 assert(is_instance(mname), "wrong type");
2670 return mname->obj_field(_clazz_offset);
2671 }
2673 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
2674 assert(is_instance(mname), "wrong type");
2675 mname->obj_field_put(_clazz_offset, clazz);
2676 }
2678 oop java_lang_invoke_MemberName::name(oop mname) {
2679 assert(is_instance(mname), "wrong type");
2680 return mname->obj_field(_name_offset);
2681 }
2683 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
2684 assert(is_instance(mname), "wrong type");
2685 mname->obj_field_put(_name_offset, name);
2686 }
2688 oop java_lang_invoke_MemberName::type(oop mname) {
2689 assert(is_instance(mname), "wrong type");
2690 return mname->obj_field(_type_offset);
2691 }
2693 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
2694 assert(is_instance(mname), "wrong type");
2695 mname->obj_field_put(_type_offset, type);
2696 }
2698 int java_lang_invoke_MemberName::flags(oop mname) {
2699 assert(is_instance(mname), "wrong type");
2700 return mname->int_field(_flags_offset);
2701 }
2703 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
2704 assert(is_instance(mname), "wrong type");
2705 mname->int_field_put(_flags_offset, flags);
2706 }
2708 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
2709 assert(is_instance(mname), "wrong type");
2710 return (Metadata*)mname->address_field(_vmtarget_offset);
2711 }
2713 #if INCLUDE_JVMTI
2714 // Can be executed on VM thread only
2715 void java_lang_invoke_MemberName::adjust_vmtarget(oop mname, Metadata* ref) {
2716 assert((is_instance(mname) && (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0), "wrong type");
2717 assert(Thread::current()->is_VM_thread(), "not VM thread");
2718 mname->address_field_put(_vmtarget_offset, (address)ref);
2719 }
2720 #endif // INCLUDE_JVMTI
2722 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
2723 assert(is_instance(mname), "wrong type");
2724 // check the type of the vmtarget
2725 oop dependency = NULL;
2726 if (ref != NULL) {
2727 switch (flags(mname) & (MN_IS_METHOD |
2728 MN_IS_CONSTRUCTOR |
2729 MN_IS_FIELD)) {
2730 case MN_IS_METHOD:
2731 case MN_IS_CONSTRUCTOR:
2732 assert(ref->is_method(), "should be a method");
2733 dependency = ((Method*)ref)->method_holder()->java_mirror();
2734 break;
2735 case MN_IS_FIELD:
2736 assert(ref->is_klass(), "should be a class");
2737 dependency = ((Klass*)ref)->java_mirror();
2738 break;
2739 default:
2740 ShouldNotReachHere();
2741 }
2742 }
2743 mname->address_field_put(_vmtarget_offset, (address)ref);
2744 // Add a reference to the loader (actually mirror because anonymous classes will not have
2745 // distinct loaders) to ensure the metadata is kept alive
2746 // This mirror may be different than the one in clazz field.
2747 mname->obj_field_put(_vmloader_offset, dependency);
2748 }
2750 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
2751 assert(is_instance(mname), "wrong type");
2752 return (intptr_t) mname->address_field(_vmindex_offset);
2753 }
2755 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
2756 assert(is_instance(mname), "wrong type");
2757 mname->address_field_put(_vmindex_offset, (address) index);
2758 }
2760 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
2761 assert(is_instance(lform), "wrong type");
2762 return lform->obj_field(_vmentry_offset);
2763 }
2766 // Support for java_lang_invoke_MethodType
2768 int java_lang_invoke_MethodType::_rtype_offset;
2769 int java_lang_invoke_MethodType::_ptypes_offset;
2771 void java_lang_invoke_MethodType::compute_offsets() {
2772 Klass* k = SystemDictionary::MethodType_klass();
2773 if (k != NULL) {
2774 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2775 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2776 }
2777 }
2779 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
2780 st->print("(");
2781 objArrayOop pts = ptypes(mt);
2782 for (int i = 0, limit = pts->length(); i < limit; i++) {
2783 java_lang_Class::print_signature(pts->obj_at(i), st);
2784 }
2785 st->print(")");
2786 java_lang_Class::print_signature(rtype(mt), st);
2787 }
2789 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2790 ResourceMark rm;
2791 stringStream buffer(128);
2792 print_signature(mt, &buffer);
2793 const char* sigstr = buffer.base();
2794 int siglen = (int) buffer.size();
2795 Symbol *name;
2796 if (!intern_if_not_found) {
2797 name = SymbolTable::probe(sigstr, siglen);
2798 } else {
2799 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2800 }
2801 return name;
2802 }
2804 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
2805 if (mt1 == mt2)
2806 return true;
2807 if (rtype(mt1) != rtype(mt2))
2808 return false;
2809 if (ptype_count(mt1) != ptype_count(mt2))
2810 return false;
2811 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
2812 if (ptype(mt1, i) != ptype(mt2, i))
2813 return false;
2814 }
2815 return true;
2816 }
2818 oop java_lang_invoke_MethodType::rtype(oop mt) {
2819 assert(is_instance(mt), "must be a MethodType");
2820 return mt->obj_field(_rtype_offset);
2821 }
2823 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
2824 assert(is_instance(mt), "must be a MethodType");
2825 return (objArrayOop) mt->obj_field(_ptypes_offset);
2826 }
2828 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
2829 return ptypes(mt)->obj_at(idx);
2830 }
2832 int java_lang_invoke_MethodType::ptype_count(oop mt) {
2833 return ptypes(mt)->length();
2834 }
2836 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
2837 objArrayOop pts = ptypes(mt);
2838 int count = pts->length();
2839 int slots = 0;
2840 for (int i = 0; i < count; i++) {
2841 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
2842 slots += type2size[bt];
2843 }
2844 return slots;
2845 }
2847 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
2848 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
2849 return type2size[bt];
2850 }
2853 // Support for java_lang_invoke_CallSite
2855 int java_lang_invoke_CallSite::_target_offset;
2857 void java_lang_invoke_CallSite::compute_offsets() {
2858 if (!EnableInvokeDynamic) return;
2859 Klass* k = SystemDictionary::CallSite_klass();
2860 if (k != NULL) {
2861 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
2862 }
2863 }
2866 // Support for java_security_AccessControlContext
2868 int java_security_AccessControlContext::_context_offset = 0;
2869 int java_security_AccessControlContext::_privilegedContext_offset = 0;
2870 int java_security_AccessControlContext::_isPrivileged_offset = 0;
2871 int java_security_AccessControlContext::_isAuthorized_offset = -1;
2873 void java_security_AccessControlContext::compute_offsets() {
2874 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
2875 fieldDescriptor fd;
2876 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass());
2878 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
2879 fatal("Invalid layout of java.security.AccessControlContext");
2880 }
2881 _context_offset = fd.offset();
2883 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
2884 fatal("Invalid layout of java.security.AccessControlContext");
2885 }
2886 _privilegedContext_offset = fd.offset();
2888 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
2889 fatal("Invalid layout of java.security.AccessControlContext");
2890 }
2891 _isPrivileged_offset = fd.offset();
2893 // The offset may not be present for bootstrapping with older JDK.
2894 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
2895 _isAuthorized_offset = fd.offset();
2896 }
2897 }
2900 bool java_security_AccessControlContext::is_authorized(Handle context) {
2901 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
2902 assert(_isAuthorized_offset != -1, "should be set");
2903 return context->bool_field(_isAuthorized_offset) != 0;
2904 }
2906 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
2907 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
2908 // Ensure klass is initialized
2909 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
2910 // Allocate result
2911 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
2912 // Fill in values
2913 result->obj_field_put(_context_offset, context());
2914 result->obj_field_put(_privilegedContext_offset, privileged_context());
2915 result->bool_field_put(_isPrivileged_offset, isPrivileged);
2916 // whitelist AccessControlContexts created by the JVM if present
2917 if (_isAuthorized_offset != -1) {
2918 result->bool_field_put(_isAuthorized_offset, true);
2919 }
2920 return result;
2921 }
2924 // Support for java_lang_ClassLoader
2926 bool java_lang_ClassLoader::offsets_computed = false;
2927 int java_lang_ClassLoader::_loader_data_offset = -1;
2928 int java_lang_ClassLoader::parallelCapable_offset = -1;
2930 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
2931 assert(loader != NULL && loader->is_oop(), "loader must be oop");
2932 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
2933 }
2935 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
2936 return *java_lang_ClassLoader::loader_data_addr(loader);
2937 }
2939 void java_lang_ClassLoader::compute_offsets() {
2940 assert(!offsets_computed, "offsets should be initialized only once");
2941 offsets_computed = true;
2943 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
2944 Klass* k1 = SystemDictionary::ClassLoader_klass();
2945 compute_optional_offset(parallelCapable_offset,
2946 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
2948 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2949 }
2951 oop java_lang_ClassLoader::parent(oop loader) {
2952 assert(is_instance(loader), "loader must be oop");
2953 return loader->obj_field(parent_offset);
2954 }
2956 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
2957 assert(is_instance(loader), "loader must be oop");
2958 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
2959 oop acl = loader;
2960 debug_only(jint loop_count = 0);
2961 // This loop taken verbatim from ClassLoader.java:
2962 do {
2963 acl = parent(acl);
2964 if (cl == acl) {
2965 return true;
2966 }
2967 assert(++loop_count > 0, "loop_count overflow");
2968 } while (acl != NULL);
2969 return false;
2970 }
2973 // For class loader classes, parallelCapable defined
2974 // based on non-null field
2975 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
2976 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
2977 if (!JDK_Version::is_gte_jdk17x_version()
2978 || parallelCapable_offset == -1) {
2979 // Default for backward compatibility is false
2980 return false;
2981 }
2982 return (class_loader->obj_field(parallelCapable_offset) != NULL);
2983 }
2985 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
2986 // Fix for 4474172; see evaluation for more details
2987 loader = non_reflection_class_loader(loader);
2989 oop cl = SystemDictionary::java_system_loader();
2990 while(cl != NULL) {
2991 if (cl == loader) return true;
2992 cl = parent(cl);
2993 }
2994 return false;
2995 }
2997 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
2998 if (loader != NULL) {
2999 // See whether this is one of the class loaders associated with
3000 // the generated bytecodes for reflection, and if so, "magically"
3001 // delegate to its parent to prevent class loading from occurring
3002 // in places where applications using reflection didn't expect it.
3003 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3004 // This might be null in non-1.4 JDKs
3005 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
3006 return parent(loader);
3007 }
3008 }
3009 return loader;
3010 }
3013 // Support for java_lang_System
3014 int java_lang_System::in_offset_in_bytes() {
3015 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3016 }
3019 int java_lang_System::out_offset_in_bytes() {
3020 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3021 }
3024 int java_lang_System::err_offset_in_bytes() {
3025 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3026 }
3029 bool java_lang_System::has_security_manager() {
3030 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass());
3031 address addr = ik->static_field_addr(static_security_offset);
3032 if (UseCompressedOops) {
3033 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3034 } else {
3035 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3036 }
3037 }
3039 int java_lang_Class::_klass_offset;
3040 int java_lang_Class::_array_klass_offset;
3041 int java_lang_Class::_oop_size_offset;
3042 int java_lang_Class::_static_oop_field_count_offset;
3043 int java_lang_Class::_protection_domain_offset;
3044 int java_lang_Class::_init_lock_offset;
3045 int java_lang_Class::_signers_offset;
3046 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3047 int java_lang_Throwable::backtrace_offset;
3048 int java_lang_Throwable::detailMessage_offset;
3049 int java_lang_Throwable::cause_offset;
3050 int java_lang_Throwable::stackTrace_offset;
3051 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3052 int java_lang_reflect_AccessibleObject::override_offset;
3053 int java_lang_reflect_Method::clazz_offset;
3054 int java_lang_reflect_Method::name_offset;
3055 int java_lang_reflect_Method::returnType_offset;
3056 int java_lang_reflect_Method::parameterTypes_offset;
3057 int java_lang_reflect_Method::exceptionTypes_offset;
3058 int java_lang_reflect_Method::slot_offset;
3059 int java_lang_reflect_Method::modifiers_offset;
3060 int java_lang_reflect_Method::signature_offset;
3061 int java_lang_reflect_Method::annotations_offset;
3062 int java_lang_reflect_Method::parameter_annotations_offset;
3063 int java_lang_reflect_Method::annotation_default_offset;
3064 int java_lang_reflect_Method::type_annotations_offset;
3065 int java_lang_reflect_Constructor::clazz_offset;
3066 int java_lang_reflect_Constructor::parameterTypes_offset;
3067 int java_lang_reflect_Constructor::exceptionTypes_offset;
3068 int java_lang_reflect_Constructor::slot_offset;
3069 int java_lang_reflect_Constructor::modifiers_offset;
3070 int java_lang_reflect_Constructor::signature_offset;
3071 int java_lang_reflect_Constructor::annotations_offset;
3072 int java_lang_reflect_Constructor::parameter_annotations_offset;
3073 int java_lang_reflect_Constructor::type_annotations_offset;
3074 int java_lang_reflect_Field::clazz_offset;
3075 int java_lang_reflect_Field::name_offset;
3076 int java_lang_reflect_Field::type_offset;
3077 int java_lang_reflect_Field::slot_offset;
3078 int java_lang_reflect_Field::modifiers_offset;
3079 int java_lang_reflect_Field::signature_offset;
3080 int java_lang_reflect_Field::annotations_offset;
3081 int java_lang_reflect_Field::type_annotations_offset;
3082 int java_lang_reflect_Parameter::name_offset;
3083 int java_lang_reflect_Parameter::modifiers_offset;
3084 int java_lang_reflect_Parameter::index_offset;
3085 int java_lang_reflect_Parameter::executable_offset;
3086 int java_lang_boxing_object::value_offset;
3087 int java_lang_boxing_object::long_value_offset;
3088 int java_lang_ref_Reference::referent_offset;
3089 int java_lang_ref_Reference::queue_offset;
3090 int java_lang_ref_Reference::next_offset;
3091 int java_lang_ref_Reference::discovered_offset;
3092 int java_lang_ref_Reference::static_lock_offset;
3093 int java_lang_ref_Reference::static_pending_offset;
3094 int java_lang_ref_Reference::number_of_fake_oop_fields;
3095 int java_lang_ref_SoftReference::timestamp_offset;
3096 int java_lang_ref_SoftReference::static_clock_offset;
3097 int java_lang_ClassLoader::parent_offset;
3098 int java_lang_System::static_in_offset;
3099 int java_lang_System::static_out_offset;
3100 int java_lang_System::static_err_offset;
3101 int java_lang_System::static_security_offset;
3102 int java_lang_StackTraceElement::declaringClass_offset;
3103 int java_lang_StackTraceElement::methodName_offset;
3104 int java_lang_StackTraceElement::fileName_offset;
3105 int java_lang_StackTraceElement::lineNumber_offset;
3106 int java_lang_AssertionStatusDirectives::classes_offset;
3107 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3108 int java_lang_AssertionStatusDirectives::packages_offset;
3109 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3110 int java_lang_AssertionStatusDirectives::deflt_offset;
3111 int java_nio_Buffer::_limit_offset;
3112 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3113 int sun_reflect_ConstantPool::_oop_offset;
3114 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3117 // Support for java_lang_StackTraceElement
3119 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3120 element->obj_field_put(fileName_offset, value);
3121 }
3123 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3124 element->obj_field_put(declaringClass_offset, value);
3125 }
3127 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3128 element->obj_field_put(methodName_offset, value);
3129 }
3131 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3132 element->int_field_put(lineNumber_offset, value);
3133 }
3136 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3138 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3139 o->obj_field_put(classes_offset, val);
3140 }
3142 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3143 o->obj_field_put(classEnabled_offset, val);
3144 }
3146 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3147 o->obj_field_put(packages_offset, val);
3148 }
3150 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3151 o->obj_field_put(packageEnabled_offset, val);
3152 }
3154 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3155 o->bool_field_put(deflt_offset, val);
3156 }
3159 // Support for intrinsification of java.nio.Buffer.checkIndex
3160 int java_nio_Buffer::limit_offset() {
3161 return _limit_offset;
3162 }
3165 void java_nio_Buffer::compute_offsets() {
3166 Klass* k = SystemDictionary::nio_Buffer_klass();
3167 assert(k != NULL, "must be loaded in 1.4+");
3168 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3169 }
3171 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3172 if (_owner_offset != 0) return;
3174 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
3175 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3176 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3177 compute_offset(_owner_offset, k,
3178 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3179 }
3181 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3182 assert(_owner_offset != 0, "Must be initialized");
3183 return obj->obj_field(_owner_offset);
3184 }
3186 // Compute hard-coded offsets
3187 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3188 // are not available to determine the offset_of_static_fields.
3189 void JavaClasses::compute_hard_coded_offsets() {
3190 const int x = heapOopSize;
3191 const int header = instanceOopDesc::base_offset_in_bytes();
3193 // Throwable Class
3194 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
3195 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3196 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
3197 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3198 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x;
3200 // java_lang_boxing_object
3201 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3202 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3204 // java_lang_ref_Reference:
3205 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3206 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3207 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
3208 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
3209 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
3210 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3211 // Artificial fields for java_lang_ref_Reference
3212 // The first field is for the discovered field added in 1.4
3213 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3215 // java_lang_ref_SoftReference Class
3216 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3217 // Don't multiply static fields because they are always in wordSize units
3218 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3220 // java_lang_ClassLoader
3221 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3223 // java_lang_System
3224 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
3225 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3226 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3227 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3229 // java_lang_StackTraceElement
3230 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
3231 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3232 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
3233 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3234 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3235 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3236 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3237 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3238 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3240 }
3243 // Compute non-hard-coded field offsets of all the classes in this file
3244 void JavaClasses::compute_offsets() {
3245 // java_lang_Class::compute_offsets was called earlier in bootstrap
3246 java_lang_ClassLoader::compute_offsets();
3247 java_lang_Thread::compute_offsets();
3248 java_lang_ThreadGroup::compute_offsets();
3249 if (EnableInvokeDynamic) {
3250 java_lang_invoke_MethodHandle::compute_offsets();
3251 java_lang_invoke_DirectMethodHandle::compute_offsets();
3252 java_lang_invoke_MemberName::compute_offsets();
3253 java_lang_invoke_LambdaForm::compute_offsets();
3254 java_lang_invoke_MethodType::compute_offsets();
3255 java_lang_invoke_CallSite::compute_offsets();
3256 }
3257 java_security_AccessControlContext::compute_offsets();
3258 // Initialize reflection classes. The layouts of these classes
3259 // changed with the new reflection implementation in JDK 1.4, and
3260 // since the Universe doesn't know what JDK version it is until this
3261 // point we defer computation of these offsets until now.
3262 java_lang_reflect_AccessibleObject::compute_offsets();
3263 java_lang_reflect_Method::compute_offsets();
3264 java_lang_reflect_Constructor::compute_offsets();
3265 java_lang_reflect_Field::compute_offsets();
3266 if (JDK_Version::is_gte_jdk14x_version()) {
3267 java_nio_Buffer::compute_offsets();
3268 }
3269 if (JDK_Version::is_gte_jdk15x_version()) {
3270 sun_reflect_ConstantPool::compute_offsets();
3271 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3272 }
3273 if (JDK_Version::is_jdk18x_version())
3274 java_lang_reflect_Parameter::compute_offsets();
3276 // generated interpreter code wants to know about the offsets we just computed:
3277 AbstractAssembler::update_delayed_values();
3278 }
3280 #ifndef PRODUCT
3282 // These functions exist to assert the validity of hard-coded field offsets to guard
3283 // against changes in the class files
3285 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3286 EXCEPTION_MARK;
3287 fieldDescriptor fd;
3288 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3289 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3290 instanceKlassHandle h_klass (THREAD, k);
3291 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3292 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3293 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3294 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3295 return false;
3296 }
3297 if (fd.is_static()) {
3298 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3299 return false;
3300 }
3301 if (fd.offset() == hardcoded_offset ) {
3302 return true;
3303 } else {
3304 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3305 klass_name, field_name, hardcoded_offset, fd.offset());
3306 return false;
3307 }
3308 }
3311 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3312 EXCEPTION_MARK;
3313 fieldDescriptor fd;
3314 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3315 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3316 instanceKlassHandle h_klass (THREAD, k);
3317 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3318 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3319 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3320 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3321 return false;
3322 }
3323 if (!fd.is_static()) {
3324 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3325 return false;
3326 }
3327 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3328 return true;
3329 } else {
3330 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());
3331 return false;
3332 }
3333 }
3336 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3337 EXCEPTION_MARK;
3338 fieldDescriptor fd;
3339 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3340 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3341 instanceKlassHandle h_klass (THREAD, k);
3342 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3343 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3344 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3345 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3346 return false;
3347 }
3348 if (!fd.is_static() || !fd.has_initial_value()) {
3349 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3350 return false;
3351 }
3352 if (!fd.initial_value_tag().is_int()) {
3353 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3354 return false;
3355 }
3356 jint field_value = fd.int_initial_value();
3357 if (field_value == hardcoded_constant) {
3358 return true;
3359 } else {
3360 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);
3361 return false;
3362 }
3363 }
3366 // Check the hard-coded field offsets of all the classes in this file
3368 void JavaClasses::check_offsets() {
3369 bool valid = true;
3370 HandleMark hm;
3372 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3373 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3375 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3376 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3378 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3379 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3381 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3382 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3384 // java.lang.String
3386 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3387 if (java_lang_String::has_offset_field()) {
3388 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3389 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3390 }
3391 if (java_lang_String::has_hash_field()) {
3392 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3393 }
3395 // java.lang.Class
3397 // Fake fields
3398 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3399 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3401 // java.lang.Throwable
3403 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3404 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3405 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3406 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3408 // Boxed primitive objects (java_lang_boxing_object)
3410 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3411 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3412 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3413 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3414 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3415 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3416 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3417 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3419 // java.lang.ClassLoader
3421 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3423 // java.lang.System
3425 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3426 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3427 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3428 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
3430 // java.lang.StackTraceElement
3432 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3433 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3434 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3435 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3437 // java.lang.ref.Reference
3439 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3440 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3441 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3442 // Fake field
3443 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3444 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3445 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3447 // java.lang.ref.SoftReference
3449 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3450 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3452 // java.lang.AssertionStatusDirectives
3453 //
3454 // The CheckAssertionStatusDirectives boolean can be removed from here and
3455 // globals.hpp after the AssertionStatusDirectives class has been integrated
3456 // into merlin "for some time." Without it, the vm will fail with early
3457 // merlin builds.
3459 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) {
3460 const char* nm = "java/lang/AssertionStatusDirectives";
3461 const char* sig = "[Ljava/lang/String;";
3462 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3463 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3464 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3465 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3466 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3467 }
3469 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3470 }
3472 #endif // PRODUCT
3474 int InjectedField::compute_offset() {
3475 Klass* klass_oop = klass();
3476 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3477 if (!may_be_java && !fs.access_flags().is_internal()) {
3478 // Only look at injected fields
3479 continue;
3480 }
3481 if (fs.name() == name() && fs.signature() == signature()) {
3482 return fs.offset();
3483 }
3484 }
3485 ResourceMark rm;
3486 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)" : "");
3487 #ifndef PRODUCT
3488 klass_oop->print();
3489 tty->print_cr("all fields:");
3490 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3491 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
3492 }
3493 #endif //PRODUCT
3494 fatal("Invalid layout of preloaded class");
3495 return -1;
3496 }
3498 void javaClasses_init() {
3499 JavaClasses::compute_offsets();
3500 JavaClasses::check_offsets();
3501 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3502 }