Wed, 19 Nov 2014 18:14:01 +0100
8065361: Fixup headers and definitions for INCLUDE_TRACE
Reviewed-by: sla, stefank
1 /*
2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #include "precompiled.hpp"
26 #include "classfile/altHashing.hpp"
27 #include "classfile/javaClasses.hpp"
28 #include "classfile/symbolTable.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "code/debugInfo.hpp"
31 #include "code/pcDesc.hpp"
32 #include "compiler/compilerOracle.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "memory/oopFactory.hpp"
35 #include "memory/resourceArea.hpp"
36 #include "memory/universe.inline.hpp"
37 #include "oops/fieldStreams.hpp"
38 #include "oops/instanceKlass.hpp"
39 #include "oops/instanceMirrorKlass.hpp"
40 #include "oops/klass.hpp"
41 #include "oops/method.hpp"
42 #include "oops/symbol.hpp"
43 #include "oops/typeArrayOop.hpp"
44 #include "runtime/fieldDescriptor.hpp"
45 #include "runtime/handles.inline.hpp"
46 #include "runtime/interfaceSupport.hpp"
47 #include "runtime/java.hpp"
48 #include "runtime/javaCalls.hpp"
49 #include "runtime/safepoint.hpp"
50 #include "runtime/thread.inline.hpp"
51 #include "runtime/vframe.hpp"
52 #include "utilities/preserveException.hpp"
54 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
56 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
57 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
59 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
60 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
62 InjectedField JavaClasses::_injected_fields[] = {
63 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
64 };
66 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
67 return _injected_fields[id].compute_offset();
68 }
71 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
72 *field_count = 0;
74 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
75 if (sid == vmSymbols::NO_SID) {
76 // Only well known classes can inject fields
77 return NULL;
78 }
80 int count = 0;
81 int start = -1;
83 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
84 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
85 count++; \
86 if (start == -1) start = klass##_##name##_enum; \
87 }
88 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
89 #undef LOOKUP_INJECTED_FIELD
91 if (start != -1) {
92 *field_count = count;
93 return _injected_fields + start;
94 }
95 return NULL;
96 }
99 static bool find_field(InstanceKlass* ik,
100 Symbol* name_symbol, Symbol* signature_symbol,
101 fieldDescriptor* fd,
102 bool allow_super = false) {
103 if (allow_super)
104 return ik->find_field(name_symbol, signature_symbol, fd) != NULL;
105 else
106 return ik->find_local_field(name_symbol, signature_symbol, fd);
107 }
109 // Helpful routine for computing field offsets at run time rather than hardcoding them
110 static void
111 compute_offset(int &dest_offset,
112 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
113 bool allow_super = false) {
114 fieldDescriptor fd;
115 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
116 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
117 ResourceMark rm;
118 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
119 #ifndef PRODUCT
120 klass_oop->print();
121 tty->print_cr("all fields:");
122 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
123 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
124 }
125 #endif //PRODUCT
126 fatal("Invalid layout of preloaded class");
127 }
128 dest_offset = fd.offset();
129 }
131 // Same as above but for "optional" offsets that might not be present in certain JDK versions
132 static void
133 compute_optional_offset(int& dest_offset,
134 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
135 bool allow_super = false) {
136 fieldDescriptor fd;
137 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
138 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
139 dest_offset = fd.offset();
140 }
141 }
144 int java_lang_String::value_offset = 0;
145 int java_lang_String::offset_offset = 0;
146 int java_lang_String::count_offset = 0;
147 int java_lang_String::hash_offset = 0;
149 bool java_lang_String::initialized = false;
151 void java_lang_String::compute_offsets() {
152 assert(!initialized, "offsets should be initialized only once");
154 Klass* k = SystemDictionary::String_klass();
155 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature());
156 compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature());
157 compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature());
158 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature());
160 initialized = true;
161 }
163 Handle java_lang_String::basic_create(int length, TRAPS) {
164 assert(initialized, "Must be initialized");
165 // Create the String object first, so there's a chance that the String
166 // and the char array it points to end up in the same cache line.
167 oop obj;
168 obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH);
170 // Create the char array. The String object must be handlized here
171 // because GC can happen as a result of the allocation attempt.
172 Handle h_obj(THREAD, obj);
173 typeArrayOop buffer;
174 buffer = oopFactory::new_charArray(length, CHECK_NH);
176 // Point the String at the char array
177 obj = h_obj();
178 set_value(obj, buffer);
179 // No need to zero the offset, allocation zero'ed the entire String object
180 assert(offset(obj) == 0, "initial String offset should be zero");
181 //set_offset(obj, 0);
182 set_count(obj, length);
184 return h_obj;
185 }
187 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
188 Handle h_obj = basic_create(length, CHECK_NH);
189 typeArrayOop buffer = value(h_obj());
190 for (int index = 0; index < length; index++) {
191 buffer->char_at_put(index, unicode[index]);
192 }
193 return h_obj;
194 }
196 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
197 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
198 return h_obj();
199 }
201 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
202 if (utf8_str == NULL) {
203 return Handle();
204 }
205 int length = UTF8::unicode_length(utf8_str);
206 Handle h_obj = basic_create(length, CHECK_NH);
207 if (length > 0) {
208 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
209 }
210 return h_obj;
211 }
213 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
214 Handle h_obj = create_from_str(utf8_str, CHECK_0);
215 return h_obj();
216 }
218 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
219 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
220 Handle h_obj = basic_create(length, CHECK_NH);
221 if (length > 0) {
222 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
223 }
224 return h_obj;
225 }
227 // Converts a C string to a Java String based on current encoding
228 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
229 assert(str != NULL, "bad arguments");
231 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
232 static to_java_string_fn_t _to_java_string_fn = NULL;
234 if (_to_java_string_fn == NULL) {
235 void *lib_handle = os::native_java_library();
236 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
237 if (_to_java_string_fn == NULL) {
238 fatal("NewStringPlatform missing");
239 }
240 }
242 jstring js = NULL;
243 { JavaThread* thread = (JavaThread*)THREAD;
244 assert(thread->is_Java_thread(), "must be java thread");
245 HandleMark hm(thread);
246 ThreadToNativeFromVM ttn(thread);
247 js = (_to_java_string_fn)(thread->jni_environment(), str);
248 }
249 return Handle(THREAD, JNIHandles::resolve(js));
250 }
252 // Converts a Java String to a native C string that can be used for
253 // native OS calls.
254 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
256 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
257 static to_platform_string_fn_t _to_platform_string_fn = NULL;
259 if (_to_platform_string_fn == NULL) {
260 void *lib_handle = os::native_java_library();
261 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
262 if (_to_platform_string_fn == NULL) {
263 fatal("GetStringPlatformChars missing");
264 }
265 }
267 char *native_platform_string;
268 { JavaThread* thread = (JavaThread*)THREAD;
269 assert(thread->is_Java_thread(), "must be java thread");
270 JNIEnv *env = thread->jni_environment();
271 jstring js = (jstring) JNIHandles::make_local(env, java_string());
272 bool is_copy;
273 HandleMark hm(thread);
274 ThreadToNativeFromVM ttn(thread);
275 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
276 assert(is_copy == JNI_TRUE, "is_copy value changed");
277 JNIHandles::destroy_local(js);
278 }
279 return native_platform_string;
280 }
282 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
283 oop obj = java_string();
284 // Typical usage is to convert all '/' to '.' in string.
285 typeArrayOop value = java_lang_String::value(obj);
286 int offset = java_lang_String::offset(obj);
287 int length = java_lang_String::length(obj);
289 // First check if any from_char exist
290 int index; // Declared outside, used later
291 for (index = 0; index < length; index++) {
292 if (value->char_at(index + offset) == from_char) {
293 break;
294 }
295 }
296 if (index == length) {
297 // No from_char, so do not copy.
298 return java_string;
299 }
301 // Create new UNICODE buffer. Must handlize value because GC
302 // may happen during String and char array creation.
303 typeArrayHandle h_value(THREAD, value);
304 Handle string = basic_create(length, CHECK_NH);
306 typeArrayOop from_buffer = h_value();
307 typeArrayOop to_buffer = java_lang_String::value(string());
309 // Copy contents
310 for (index = 0; index < length; index++) {
311 jchar c = from_buffer->char_at(index + offset);
312 if (c == from_char) {
313 c = to_char;
314 }
315 to_buffer->char_at_put(index, c);
316 }
317 return string;
318 }
320 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
321 typeArrayOop value = java_lang_String::value(java_string);
322 int offset = java_lang_String::offset(java_string);
323 length = java_lang_String::length(java_string);
325 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
326 if (result != NULL) {
327 for (int index = 0; index < length; index++) {
328 result[index] = value->char_at(index + offset);
329 }
330 } else {
331 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
332 }
333 return result;
334 }
336 unsigned int java_lang_String::hash_code(oop java_string) {
337 int length = java_lang_String::length(java_string);
338 // Zero length string will hash to zero with String.hashCode() function.
339 if (length == 0) return 0;
341 typeArrayOop value = java_lang_String::value(java_string);
342 int offset = java_lang_String::offset(java_string);
343 return java_lang_String::hash_code(value->char_at_addr(offset), length);
344 }
346 char* java_lang_String::as_quoted_ascii(oop java_string) {
347 typeArrayOop value = java_lang_String::value(java_string);
348 int offset = java_lang_String::offset(java_string);
349 int length = java_lang_String::length(java_string);
351 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
352 if (base == NULL) return NULL;
354 int result_length = UNICODE::quoted_ascii_length(base, length) + 1;
355 char* result = NEW_RESOURCE_ARRAY(char, result_length);
356 UNICODE::as_quoted_ascii(base, length, result, result_length);
357 assert(result_length >= length + 1, "must not be shorter");
358 assert(result_length == (int)strlen(result) + 1, "must match");
359 return result;
360 }
362 unsigned int java_lang_String::hash_string(oop java_string) {
363 int length = java_lang_String::length(java_string);
364 // Zero length string doesn't hash necessarily hash to zero.
365 if (length == 0) {
366 return StringTable::hash_string(NULL, 0);
367 }
369 typeArrayOop value = java_lang_String::value(java_string);
370 int offset = java_lang_String::offset(java_string);
371 return StringTable::hash_string(value->char_at_addr(offset), length);
372 }
374 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {
375 oop obj = java_string();
376 typeArrayOop value = java_lang_String::value(obj);
377 int offset = java_lang_String::offset(obj);
378 int length = java_lang_String::length(obj);
379 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
380 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
381 return sym;
382 }
384 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
385 typeArrayOop value = java_lang_String::value(java_string);
386 int offset = java_lang_String::offset(java_string);
387 int length = java_lang_String::length(java_string);
388 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
389 return SymbolTable::probe_unicode(base, length);
390 }
393 int java_lang_String::utf8_length(oop java_string) {
394 typeArrayOop value = java_lang_String::value(java_string);
395 int offset = java_lang_String::offset(java_string);
396 int length = java_lang_String::length(java_string);
397 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
398 return UNICODE::utf8_length(position, length);
399 }
401 char* java_lang_String::as_utf8_string(oop java_string) {
402 typeArrayOop value = java_lang_String::value(java_string);
403 int offset = java_lang_String::offset(java_string);
404 int length = java_lang_String::length(java_string);
405 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
406 return UNICODE::as_utf8(position, length);
407 }
409 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
410 typeArrayOop value = java_lang_String::value(java_string);
411 int offset = java_lang_String::offset(java_string);
412 int length = java_lang_String::length(java_string);
413 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
414 return UNICODE::as_utf8(position, length, buf, buflen);
415 }
417 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
418 typeArrayOop value = java_lang_String::value(java_string);
419 int offset = java_lang_String::offset(java_string);
420 int length = java_lang_String::length(java_string);
421 assert(start + len <= length, "just checking");
422 jchar* position = value->char_at_addr(offset + start);
423 return UNICODE::as_utf8(position, len);
424 }
426 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
427 assert(java_string->klass() == SystemDictionary::String_klass(),
428 "must be java_string");
429 typeArrayOop value = java_lang_String::value(java_string);
430 int offset = java_lang_String::offset(java_string);
431 int length = java_lang_String::length(java_string);
432 if (length != len) {
433 return false;
434 }
435 for (int i = 0; i < len; i++) {
436 if (value->char_at(i + offset) != chars[i]) {
437 return false;
438 }
439 }
440 return true;
441 }
443 bool java_lang_String::equals(oop str1, oop str2) {
444 assert(str1->klass() == SystemDictionary::String_klass(),
445 "must be java String");
446 assert(str2->klass() == SystemDictionary::String_klass(),
447 "must be java String");
448 typeArrayOop value1 = java_lang_String::value(str1);
449 int offset1 = java_lang_String::offset(str1);
450 int length1 = java_lang_String::length(str1);
451 typeArrayOop value2 = java_lang_String::value(str2);
452 int offset2 = java_lang_String::offset(str2);
453 int length2 = java_lang_String::length(str2);
455 if (length1 != length2) {
456 return false;
457 }
458 for (int i = 0; i < length1; i++) {
459 if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) {
460 return false;
461 }
462 }
463 return true;
464 }
466 void java_lang_String::print(oop java_string, outputStream* st) {
467 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
468 typeArrayOop value = java_lang_String::value(java_string);
469 int offset = java_lang_String::offset(java_string);
470 int length = java_lang_String::length(java_string);
472 int end = MIN2(length, 100);
473 if (value == NULL) {
474 // This can happen if, e.g., printing a String
475 // object before its initializer has been called
476 st->print_cr("NULL");
477 } else {
478 st->print("\"");
479 for (int index = 0; index < length; index++) {
480 st->print("%c", value->char_at(index + offset));
481 }
482 st->print("\"");
483 }
484 }
487 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
488 assert(mirror.not_null() && fd->is_static(), "just checking");
489 if (fd->has_initial_value()) {
490 BasicType t = fd->field_type();
491 switch (t) {
492 case T_BYTE:
493 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
494 break;
495 case T_BOOLEAN:
496 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
497 break;
498 case T_CHAR:
499 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
500 break;
501 case T_SHORT:
502 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
503 break;
504 case T_INT:
505 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
506 break;
507 case T_FLOAT:
508 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
509 break;
510 case T_DOUBLE:
511 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
512 break;
513 case T_LONG:
514 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
515 break;
516 case T_OBJECT:
517 {
518 #ifdef ASSERT
519 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
520 assert(fd->signature() == sym, "just checking");
521 #endif
522 oop string = fd->string_initial_value(CHECK);
523 mirror()->obj_field_put(fd->offset(), string);
524 }
525 break;
526 default:
527 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
528 "Illegal ConstantValue attribute in class file");
529 }
530 }
531 }
534 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) {
535 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
537 // If the offset was read from the shared archive, it was fixed up already
538 if (!k->is_shared()) {
539 if (k->oop_is_instance()) {
540 // During bootstrap, java.lang.Class wasn't loaded so static field
541 // offsets were computed without the size added it. Go back and
542 // update all the static field offsets to included the size.
543 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) {
544 if (fs.access_flags().is_static()) {
545 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
546 fs.set_offset(real_offset);
547 }
548 }
549 }
550 }
551 create_mirror(k, Handle(NULL), Handle(NULL), CHECK);
552 }
554 void java_lang_Class::initialize_mirror_fields(KlassHandle k,
555 Handle mirror,
556 Handle protection_domain,
557 TRAPS) {
558 // Allocate a simple java object for a lock.
559 // This needs to be a java object because during class initialization
560 // it can be held across a java call.
561 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
562 set_init_lock(mirror(), r);
564 // Set protection domain also
565 set_protection_domain(mirror(), protection_domain());
567 // Initialize static fields
568 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK);
569 }
571 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader,
572 Handle protection_domain, TRAPS) {
573 assert(k->java_mirror() == NULL, "should only assign mirror once");
574 // Use this moment of initialization to cache modifier_flags also,
575 // to support Class.getModifiers(). Instance classes recalculate
576 // the cached flags after the class file is parsed, but before the
577 // class is put into the system dictionary.
578 int computed_modifiers = k->compute_modifier_flags(CHECK);
579 k->set_modifier_flags(computed_modifiers);
580 // Class_klass has to be loaded because it is used to allocate
581 // the mirror.
582 if (SystemDictionary::Class_klass_loaded()) {
583 // Allocate mirror (java.lang.Class instance)
584 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
586 // Setup indirection from mirror->klass
587 if (!k.is_null()) {
588 java_lang_Class::set_klass(mirror(), k());
589 }
591 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
592 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
594 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
596 // It might also have a component mirror. This mirror must already exist.
597 if (k->oop_is_array()) {
598 Handle comp_mirror;
599 if (k->oop_is_typeArray()) {
600 BasicType type = TypeArrayKlass::cast(k())->element_type();
601 comp_mirror = Universe::java_mirror(type);
602 } else {
603 assert(k->oop_is_objArray(), "Must be");
604 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass();
605 assert(element_klass != NULL, "Must have an element klass");
606 comp_mirror = element_klass->java_mirror();
607 }
608 assert(comp_mirror.not_null(), "must have a mirror");
610 // Two-way link between the array klass and its component mirror:
611 ArrayKlass::cast(k())->set_component_mirror(comp_mirror());
612 set_array_klass(comp_mirror(), k());
613 } else {
614 assert(k->oop_is_instance(), "Must be");
616 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
617 if (HAS_PENDING_EXCEPTION) {
618 // If any of the fields throws an exception like OOM remove the klass field
619 // from the mirror so GC doesn't follow it after the klass has been deallocated.
620 // This mirror looks like a primitive type, which logically it is because it
621 // it represents no class.
622 java_lang_Class::set_klass(mirror(), NULL);
623 return;
624 }
625 }
627 // set the classLoader field in the java_lang_Class instance
628 assert(class_loader() == k->class_loader(), "should be same");
629 set_class_loader(mirror(), class_loader());
631 // Setup indirection from klass->mirror last
632 // after any exceptions can happen during allocations.
633 if (!k.is_null()) {
634 k->set_java_mirror(mirror());
635 }
636 } else {
637 if (fixup_mirror_list() == NULL) {
638 GrowableArray<Klass*>* list =
639 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
640 set_fixup_mirror_list(list);
641 }
642 fixup_mirror_list()->push(k());
643 }
644 }
647 int java_lang_Class::oop_size(oop java_class) {
648 assert(_oop_size_offset != 0, "must be set");
649 return java_class->int_field(_oop_size_offset);
650 }
651 void java_lang_Class::set_oop_size(oop java_class, int size) {
652 assert(_oop_size_offset != 0, "must be set");
653 java_class->int_field_put(_oop_size_offset, size);
654 }
655 int java_lang_Class::static_oop_field_count(oop java_class) {
656 assert(_static_oop_field_count_offset != 0, "must be set");
657 return java_class->int_field(_static_oop_field_count_offset);
658 }
659 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
660 assert(_static_oop_field_count_offset != 0, "must be set");
661 java_class->int_field_put(_static_oop_field_count_offset, size);
662 }
664 oop java_lang_Class::protection_domain(oop java_class) {
665 assert(_protection_domain_offset != 0, "must be set");
666 return java_class->obj_field(_protection_domain_offset);
667 }
668 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
669 assert(_protection_domain_offset != 0, "must be set");
670 java_class->obj_field_put(_protection_domain_offset, pd);
671 }
673 oop java_lang_Class::init_lock(oop java_class) {
674 assert(_init_lock_offset != 0, "must be set");
675 return java_class->obj_field(_init_lock_offset);
676 }
677 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
678 assert(_init_lock_offset != 0, "must be set");
679 java_class->obj_field_put(_init_lock_offset, init_lock);
680 }
682 objArrayOop java_lang_Class::signers(oop java_class) {
683 assert(_signers_offset != 0, "must be set");
684 return (objArrayOop)java_class->obj_field(_signers_offset);
685 }
686 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
687 assert(_signers_offset != 0, "must be set");
688 java_class->obj_field_put(_signers_offset, (oop)signers);
689 }
692 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
693 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
694 if (_class_loader_offset != 0) {
695 java_class->obj_field_put(_class_loader_offset, loader);
696 }
697 }
699 oop java_lang_Class::class_loader(oop java_class) {
700 assert(_class_loader_offset != 0, "must be set");
701 return java_class->obj_field(_class_loader_offset);
702 }
704 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
705 // This should be improved by adding a field at the Java level or by
706 // introducing a new VM klass (see comment in ClassFileParser)
707 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
708 if (type != T_VOID) {
709 Klass* aklass = Universe::typeArrayKlassObj(type);
710 assert(aklass != NULL, "correct bootstrap");
711 set_array_klass(java_class, aklass);
712 }
713 #ifdef ASSERT
714 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
715 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
716 #endif
717 return java_class;
718 }
721 Klass* java_lang_Class::as_Klass(oop java_class) {
722 //%note memory_2
723 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
724 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
725 assert(k == NULL || k->is_klass(), "type check");
726 return k;
727 }
730 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
731 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
732 java_class->metadata_field_put(_klass_offset, klass);
733 }
736 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
737 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
738 Symbol* name = NULL;
739 bool is_instance = false;
740 if (is_primitive(java_class)) {
741 name = vmSymbols::type_signature(primitive_type(java_class));
742 } else {
743 Klass* k = as_Klass(java_class);
744 is_instance = k->oop_is_instance();
745 name = k->name();
746 }
747 if (name == NULL) {
748 st->print("<null>");
749 return;
750 }
751 if (is_instance) st->print("L");
752 st->write((char*) name->base(), (int) name->utf8_length());
753 if (is_instance) st->print(";");
754 }
756 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
757 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
758 Symbol* name;
759 if (is_primitive(java_class)) {
760 name = vmSymbols::type_signature(primitive_type(java_class));
761 // Because this can create a new symbol, the caller has to decrement
762 // the refcount, so make adjustment here and below for symbols returned
763 // that are not created or incremented due to a successful lookup.
764 name->increment_refcount();
765 } else {
766 Klass* k = as_Klass(java_class);
767 if (!k->oop_is_instance()) {
768 name = k->name();
769 name->increment_refcount();
770 } else {
771 ResourceMark rm;
772 const char* sigstr = k->signature_name();
773 int siglen = (int) strlen(sigstr);
774 if (!intern_if_not_found) {
775 name = SymbolTable::probe(sigstr, siglen);
776 } else {
777 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
778 }
779 }
780 }
781 return name;
782 }
785 Klass* java_lang_Class::array_klass(oop java_class) {
786 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
787 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass");
788 return k;
789 }
792 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
793 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass");
794 java_class->metadata_field_put(_array_klass_offset, klass);
795 }
798 bool java_lang_Class::is_primitive(oop java_class) {
799 // should assert:
800 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
801 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
803 #ifdef ASSERT
804 if (is_primitive) {
805 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
806 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
807 "Should be either the T_VOID primitive or a java primitive");
808 }
809 #endif
811 return is_primitive;
812 }
815 BasicType java_lang_Class::primitive_type(oop java_class) {
816 assert(java_lang_Class::is_primitive(java_class), "just checking");
817 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
818 BasicType type = T_VOID;
819 if (ak != NULL) {
820 // Note: create_basic_type_mirror above initializes ak to a non-null value.
821 type = ArrayKlass::cast(ak)->element_type();
822 } else {
823 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
824 }
825 assert(Universe::java_mirror(type) == java_class, "must be consistent");
826 return type;
827 }
829 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
830 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
831 if (is_primitive(java_class)) {
832 if (reference_klass != NULL)
833 (*reference_klass) = NULL;
834 return primitive_type(java_class);
835 } else {
836 if (reference_klass != NULL)
837 (*reference_klass) = as_Klass(java_class);
838 return T_OBJECT;
839 }
840 }
843 oop java_lang_Class::primitive_mirror(BasicType t) {
844 oop mirror = Universe::java_mirror(t);
845 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
846 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
847 return mirror;
848 }
850 bool java_lang_Class::offsets_computed = false;
851 int java_lang_Class::classRedefinedCount_offset = -1;
853 void java_lang_Class::compute_offsets() {
854 assert(!offsets_computed, "offsets should be initialized only once");
855 offsets_computed = true;
857 Klass* klass_oop = SystemDictionary::Class_klass();
858 // The classRedefinedCount field is only present starting in 1.5,
859 // so don't go fatal.
860 compute_optional_offset(classRedefinedCount_offset,
861 klass_oop, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
863 // Needs to be optional because the old build runs Queens during bootstrapping
864 // and jdk8-9 doesn't have coordinated pushes yet.
865 compute_optional_offset(_class_loader_offset,
866 klass_oop, vmSymbols::classLoader_name(),
867 vmSymbols::classloader_signature());
869 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
870 }
872 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
873 if (!JDK_Version::is_gte_jdk15x_version()
874 || classRedefinedCount_offset == -1) {
875 // The classRedefinedCount field is only present starting in 1.5.
876 // If we don't have an offset for it then just return -1 as a marker.
877 return -1;
878 }
880 return the_class_mirror->int_field(classRedefinedCount_offset);
881 }
883 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
884 if (!JDK_Version::is_gte_jdk15x_version()
885 || classRedefinedCount_offset == -1) {
886 // The classRedefinedCount field is only present starting in 1.5.
887 // If we don't have an offset for it then nothing to set.
888 return;
889 }
891 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
892 }
895 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
896 // platform thread structure, and a eetop offset which was used for thread
897 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
898 // merged, so in the HotSpot VM we just use the eetop field for the thread
899 // instead of the privateInfo_offset.
900 //
901 // Note: The stackSize field is only present starting in 1.4.
903 int java_lang_Thread::_name_offset = 0;
904 int java_lang_Thread::_group_offset = 0;
905 int java_lang_Thread::_contextClassLoader_offset = 0;
906 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
907 int java_lang_Thread::_priority_offset = 0;
908 int java_lang_Thread::_eetop_offset = 0;
909 int java_lang_Thread::_daemon_offset = 0;
910 int java_lang_Thread::_stillborn_offset = 0;
911 int java_lang_Thread::_stackSize_offset = 0;
912 int java_lang_Thread::_tid_offset = 0;
913 int java_lang_Thread::_thread_status_offset = 0;
914 int java_lang_Thread::_park_blocker_offset = 0;
915 int java_lang_Thread::_park_event_offset = 0 ;
918 void java_lang_Thread::compute_offsets() {
919 assert(_group_offset == 0, "offsets should be initialized only once");
921 Klass* k = SystemDictionary::Thread_klass();
922 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature());
923 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
924 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
925 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
926 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
927 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
928 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
929 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
930 // The stackSize field is only present starting in 1.4, so don't go fatal.
931 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
932 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
933 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
934 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
935 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
936 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
937 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
938 vmSymbols::long_signature());
939 }
942 JavaThread* java_lang_Thread::thread(oop java_thread) {
943 return (JavaThread*)java_thread->address_field(_eetop_offset);
944 }
947 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
948 java_thread->address_field_put(_eetop_offset, (address)thread);
949 }
952 typeArrayOop java_lang_Thread::name(oop java_thread) {
953 oop name = java_thread->obj_field(_name_offset);
954 assert(name == NULL || (name->is_typeArray() && TypeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking");
955 return typeArrayOop(name);
956 }
959 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) {
960 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL");
961 java_thread->obj_field_put(_name_offset, name);
962 }
965 ThreadPriority java_lang_Thread::priority(oop java_thread) {
966 return (ThreadPriority)java_thread->int_field(_priority_offset);
967 }
970 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
971 java_thread->int_field_put(_priority_offset, priority);
972 }
975 oop java_lang_Thread::threadGroup(oop java_thread) {
976 return java_thread->obj_field(_group_offset);
977 }
980 bool java_lang_Thread::is_stillborn(oop java_thread) {
981 return java_thread->bool_field(_stillborn_offset) != 0;
982 }
985 // We never have reason to turn the stillborn bit off
986 void java_lang_Thread::set_stillborn(oop java_thread) {
987 java_thread->bool_field_put(_stillborn_offset, true);
988 }
991 bool java_lang_Thread::is_alive(oop java_thread) {
992 JavaThread* thr = java_lang_Thread::thread(java_thread);
993 return (thr != NULL);
994 }
997 bool java_lang_Thread::is_daemon(oop java_thread) {
998 return java_thread->bool_field(_daemon_offset) != 0;
999 }
1002 void java_lang_Thread::set_daemon(oop java_thread) {
1003 java_thread->bool_field_put(_daemon_offset, true);
1004 }
1006 oop java_lang_Thread::context_class_loader(oop java_thread) {
1007 return java_thread->obj_field(_contextClassLoader_offset);
1008 }
1010 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1011 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1012 }
1015 jlong java_lang_Thread::stackSize(oop java_thread) {
1016 // The stackSize field is only present starting in 1.4
1017 if (_stackSize_offset > 0) {
1018 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check");
1019 return java_thread->long_field(_stackSize_offset);
1020 } else {
1021 return 0;
1022 }
1023 }
1025 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1026 void java_lang_Thread::set_thread_status(oop java_thread,
1027 java_lang_Thread::ThreadStatus status) {
1028 // The threadStatus is only present starting in 1.5
1029 if (_thread_status_offset > 0) {
1030 java_thread->int_field_put(_thread_status_offset, status);
1031 }
1032 }
1034 // Read thread status value from threadStatus field in java.lang.Thread java class.
1035 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1036 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() ||
1037 JavaThread::current()->thread_state() == _thread_in_vm,
1038 "Java Thread is not running in vm");
1039 // The threadStatus is only present starting in 1.5
1040 if (_thread_status_offset > 0) {
1041 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1042 } else {
1043 // All we can easily figure out is if it is alive, but that is
1044 // enough info for a valid unknown status.
1045 // These aren't restricted to valid set ThreadStatus values, so
1046 // use JVMTI values and cast.
1047 JavaThread* thr = java_lang_Thread::thread(java_thread);
1048 if (thr == NULL) {
1049 // the thread hasn't run yet or is in the process of exiting
1050 return NEW;
1051 }
1052 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1053 }
1054 }
1057 jlong java_lang_Thread::thread_id(oop java_thread) {
1058 // The thread ID field is only present starting in 1.5
1059 if (_tid_offset > 0) {
1060 return java_thread->long_field(_tid_offset);
1061 } else {
1062 return 0;
1063 }
1064 }
1066 oop java_lang_Thread::park_blocker(oop java_thread) {
1067 assert(JDK_Version::current().supports_thread_park_blocker() &&
1068 _park_blocker_offset != 0, "Must support parkBlocker field");
1070 if (_park_blocker_offset > 0) {
1071 return java_thread->obj_field(_park_blocker_offset);
1072 }
1074 return NULL;
1075 }
1077 jlong java_lang_Thread::park_event(oop java_thread) {
1078 if (_park_event_offset > 0) {
1079 return java_thread->long_field(_park_event_offset);
1080 }
1081 return 0;
1082 }
1084 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1085 if (_park_event_offset > 0) {
1086 java_thread->long_field_put(_park_event_offset, ptr);
1087 return true;
1088 }
1089 return false;
1090 }
1093 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1094 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status");
1095 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1096 switch (status) {
1097 case NEW : return "NEW";
1098 case RUNNABLE : return "RUNNABLE";
1099 case SLEEPING : return "TIMED_WAITING (sleeping)";
1100 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1101 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1102 case PARKED : return "WAITING (parking)";
1103 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1104 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1105 case TERMINATED : return "TERMINATED";
1106 default : return "UNKNOWN";
1107 };
1108 }
1109 int java_lang_ThreadGroup::_parent_offset = 0;
1110 int java_lang_ThreadGroup::_name_offset = 0;
1111 int java_lang_ThreadGroup::_threads_offset = 0;
1112 int java_lang_ThreadGroup::_groups_offset = 0;
1113 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1114 int java_lang_ThreadGroup::_destroyed_offset = 0;
1115 int java_lang_ThreadGroup::_daemon_offset = 0;
1116 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
1117 int java_lang_ThreadGroup::_nthreads_offset = 0;
1118 int java_lang_ThreadGroup::_ngroups_offset = 0;
1120 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1121 assert(java_thread_group->is_oop(), "thread group must be oop");
1122 return java_thread_group->obj_field(_parent_offset);
1123 }
1125 // ("name as oop" accessor is not necessary)
1127 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
1128 oop name = java_thread_group->obj_field(_name_offset);
1129 // ThreadGroup.name can be null
1130 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
1131 }
1133 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1134 assert(java_thread_group->is_oop(), "thread group must be oop");
1135 return java_thread_group->int_field(_nthreads_offset);
1136 }
1138 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1139 oop threads = java_thread_group->obj_field(_threads_offset);
1140 assert(threads != NULL, "threadgroups should have threads");
1141 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1142 return objArrayOop(threads);
1143 }
1145 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1146 assert(java_thread_group->is_oop(), "thread group must be oop");
1147 return java_thread_group->int_field(_ngroups_offset);
1148 }
1150 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1151 oop groups = java_thread_group->obj_field(_groups_offset);
1152 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1153 return objArrayOop(groups);
1154 }
1156 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1157 assert(java_thread_group->is_oop(), "thread group must be oop");
1158 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1159 }
1161 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1162 assert(java_thread_group->is_oop(), "thread group must be oop");
1163 return java_thread_group->bool_field(_destroyed_offset) != 0;
1164 }
1166 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1167 assert(java_thread_group->is_oop(), "thread group must be oop");
1168 return java_thread_group->bool_field(_daemon_offset) != 0;
1169 }
1171 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1172 assert(java_thread_group->is_oop(), "thread group must be oop");
1173 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1174 }
1176 void java_lang_ThreadGroup::compute_offsets() {
1177 assert(_parent_offset == 0, "offsets should be initialized only once");
1179 Klass* k = SystemDictionary::ThreadGroup_klass();
1181 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1182 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1183 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1184 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1185 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1186 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1187 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1188 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1189 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1190 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1191 }
1193 oop java_lang_Throwable::unassigned_stacktrace() {
1194 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass());
1195 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1196 if (UseCompressedOops) {
1197 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1198 } else {
1199 return oopDesc::load_decode_heap_oop((oop*)addr);
1200 }
1201 }
1203 oop java_lang_Throwable::backtrace(oop throwable) {
1204 return throwable->obj_field_acquire(backtrace_offset);
1205 }
1208 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1209 throwable->release_obj_field_put(backtrace_offset, value);
1210 }
1213 oop java_lang_Throwable::message(oop throwable) {
1214 return throwable->obj_field(detailMessage_offset);
1215 }
1218 oop java_lang_Throwable::message(Handle throwable) {
1219 return throwable->obj_field(detailMessage_offset);
1220 }
1223 void java_lang_Throwable::set_message(oop throwable, oop value) {
1224 throwable->obj_field_put(detailMessage_offset, value);
1225 }
1228 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1229 throwable->obj_field_put(stackTrace_offset, st_element_array);
1230 }
1232 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1233 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1234 set_stacktrace(throwable, NULL);
1235 }
1238 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1239 ResourceMark rm;
1240 Klass* k = throwable->klass();
1241 assert(k != NULL, "just checking");
1242 st->print("%s", InstanceKlass::cast(k)->external_name());
1243 oop msg = message(throwable);
1244 if (msg != NULL) {
1245 st->print(": %s", java_lang_String::as_utf8_string(msg));
1246 }
1247 }
1250 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1251 ResourceMark rm;
1252 Klass* k = throwable->klass();
1253 assert(k != NULL, "just checking");
1254 st->print("%s", InstanceKlass::cast(k)->external_name());
1255 oop msg = message(throwable);
1256 if (msg != NULL) {
1257 st->print(": %s", java_lang_String::as_utf8_string(msg));
1258 }
1259 }
1261 // After this many redefines, the stack trace is unreliable.
1262 const int MAX_VERSION = USHRT_MAX;
1264 // Helper backtrace functions to store bci|version together.
1265 static inline int merge_bci_and_version(int bci, int version) {
1266 // only store u2 for version, checking for overflow.
1267 if (version > USHRT_MAX || version < 0) version = MAX_VERSION;
1268 assert((jushort)bci == bci, "bci should be short");
1269 return build_int_from_shorts(version, bci);
1270 }
1272 static inline int bci_at(unsigned int merged) {
1273 return extract_high_short_from_int(merged);
1274 }
1275 static inline int version_at(unsigned int merged) {
1276 return extract_low_short_from_int(merged);
1277 }
1279 static inline bool version_matches(Method* method, int version) {
1280 return (method->constants()->version() == version && version < MAX_VERSION);
1281 }
1283 static inline int get_line_number(Method* method, int bci) {
1284 int line_number = 0;
1285 if (method->is_native()) {
1286 // Negative value different from -1 below, enabling Java code in
1287 // class java.lang.StackTraceElement to distinguish "native" from
1288 // "no LineNumberTable". JDK tests for -2.
1289 line_number = -2;
1290 } else {
1291 // Returns -1 if no LineNumberTable, and otherwise actual line number
1292 line_number = method->line_number_from_bci(bci);
1293 if (line_number == -1 && ShowHiddenFrames) {
1294 line_number = bci + 1000000;
1295 }
1296 }
1297 return line_number;
1298 }
1300 // This class provides a simple wrapper over the internal structure of
1301 // exception backtrace to insulate users of the backtrace from needing
1302 // to know what it looks like.
1303 class BacktraceBuilder: public StackObj {
1304 private:
1305 Handle _backtrace;
1306 objArrayOop _head;
1307 typeArrayOop _methods;
1308 typeArrayOop _bcis;
1309 objArrayOop _mirrors;
1310 int _index;
1311 No_Safepoint_Verifier _nsv;
1313 public:
1315 enum {
1316 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1317 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1318 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1319 trace_next_offset = java_lang_Throwable::trace_next_offset,
1320 trace_size = java_lang_Throwable::trace_size,
1321 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1322 };
1324 // get info out of chunks
1325 static typeArrayOop get_methods(objArrayHandle chunk) {
1326 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1327 assert(methods != NULL, "method array should be initialized in backtrace");
1328 return methods;
1329 }
1330 static typeArrayOop get_bcis(objArrayHandle chunk) {
1331 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1332 assert(bcis != NULL, "bci array should be initialized in backtrace");
1333 return bcis;
1334 }
1335 static objArrayOop get_mirrors(objArrayHandle chunk) {
1336 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1337 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1338 return mirrors;
1339 }
1341 // constructor for new backtrace
1342 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL) {
1343 expand(CHECK);
1344 _backtrace = _head;
1345 _index = 0;
1346 }
1348 BacktraceBuilder(objArrayHandle backtrace) {
1349 _methods = get_methods(backtrace);
1350 _bcis = get_bcis(backtrace);
1351 _mirrors = get_mirrors(backtrace);
1352 assert(_methods->length() == _bcis->length() &&
1353 _methods->length() == _mirrors->length(),
1354 "method and source information arrays should match");
1356 // head is the preallocated backtrace
1357 _backtrace = _head = backtrace();
1358 _index = 0;
1359 }
1361 void expand(TRAPS) {
1362 objArrayHandle old_head(THREAD, _head);
1363 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1365 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1366 objArrayHandle new_head(THREAD, head);
1368 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1369 typeArrayHandle new_methods(THREAD, methods);
1371 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1372 typeArrayHandle new_bcis(THREAD, bcis);
1374 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1375 objArrayHandle new_mirrors(THREAD, mirrors);
1377 if (!old_head.is_null()) {
1378 old_head->obj_at_put(trace_next_offset, new_head());
1379 }
1380 new_head->obj_at_put(trace_methods_offset, new_methods());
1381 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1382 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1384 _head = new_head();
1385 _methods = new_methods();
1386 _bcis = new_bcis();
1387 _mirrors = new_mirrors();
1388 _index = 0;
1389 }
1391 oop backtrace() {
1392 return _backtrace();
1393 }
1395 inline void push(Method* method, int bci, TRAPS) {
1396 // Smear the -1 bci to 0 since the array only holds unsigned
1397 // shorts. The later line number lookup would just smear the -1
1398 // to a 0 even if it could be recorded.
1399 if (bci == SynchronizationEntryBCI) bci = 0;
1401 if (_index >= trace_chunk_size) {
1402 methodHandle mhandle(THREAD, method);
1403 expand(CHECK);
1404 method = mhandle();
1405 }
1407 _methods->short_at_put(_index, method->method_idnum());
1408 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version()));
1410 // We need to save the mirrors in the backtrace to keep the class
1411 // from being unloaded while we still have this stack trace.
1412 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1413 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1414 _index++;
1415 }
1417 };
1419 // Print stack trace element to resource allocated buffer
1420 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
1421 int method_id, int version, int bci) {
1423 // Get strings and string lengths
1424 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1425 const char* klass_name = holder->external_name();
1426 int buf_len = (int)strlen(klass_name);
1428 // The method id may point to an obsolete method, can't get more stack information
1429 Method* method = holder->method_with_idnum(method_id);
1430 if (method == NULL) {
1431 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1432 // This is what the java code prints in this case - added Redefined
1433 sprintf(buf, "\tat %s.null (Redefined)", klass_name);
1434 return buf;
1435 }
1437 char* method_name = method->name()->as_C_string();
1438 buf_len += (int)strlen(method_name);
1440 char* source_file_name = NULL;
1441 if (version_matches(method, version)) {
1442 Symbol* source = holder->source_file_name();
1443 if (source != NULL) {
1444 source_file_name = source->as_C_string();
1445 buf_len += (int)strlen(source_file_name);
1446 }
1447 }
1449 // Allocate temporary buffer with extra space for formatting and line number
1450 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1452 // Print stack trace line in buffer
1453 sprintf(buf, "\tat %s.%s", klass_name, method_name);
1455 if (!version_matches(method, version)) {
1456 strcat(buf, "(Redefined)");
1457 } else {
1458 int line_number = get_line_number(method, bci);
1459 if (line_number == -2) {
1460 strcat(buf, "(Native Method)");
1461 } else {
1462 if (source_file_name != NULL && (line_number != -1)) {
1463 // Sourcename and linenumber
1464 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1465 } else if (source_file_name != NULL) {
1466 // Just sourcename
1467 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1468 } else {
1469 // Neither sourcename nor linenumber
1470 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1471 }
1472 nmethod* nm = method->code();
1473 if (WizardMode && nm != NULL) {
1474 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1475 }
1476 }
1477 }
1479 return buf;
1480 }
1482 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror,
1483 int method_id, int version, int bci) {
1484 ResourceMark rm;
1485 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci);
1486 st->print_cr("%s", buf);
1487 }
1489 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) {
1490 Handle mirror = method->method_holder()->java_mirror();
1491 int method_id = method->method_idnum();
1492 int version = method->constants()->version();
1493 print_stack_element(st, mirror, method_id, version, bci);
1494 }
1496 const char* java_lang_Throwable::no_stack_trace_message() {
1497 return "\t<<no stack trace available>>";
1498 }
1501 // Currently used only for exceptions occurring during startup
1502 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1503 Thread *THREAD = Thread::current();
1504 Handle h_throwable(THREAD, throwable);
1505 while (h_throwable.not_null()) {
1506 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1507 if (result.is_null()) {
1508 st->print_cr("%s", no_stack_trace_message());
1509 return;
1510 }
1512 while (result.not_null()) {
1514 // Get method id, bci, version and mirror from chunk
1515 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result));
1516 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result));
1517 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result));
1519 int length = methods()->length();
1520 for (int index = 0; index < length; index++) {
1521 Handle mirror(THREAD, mirrors->obj_at(index));
1522 // NULL mirror means end of stack trace
1523 if (mirror.is_null()) goto handle_cause;
1524 int method = methods->short_at(index);
1525 int version = version_at(bcis->int_at(index));
1526 int bci = bci_at(bcis->int_at(index));
1527 print_stack_element(st, mirror, method, version, bci);
1528 }
1529 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1530 }
1531 handle_cause:
1532 {
1533 EXCEPTION_MARK;
1534 JavaValue cause(T_OBJECT);
1535 JavaCalls::call_virtual(&cause,
1536 h_throwable,
1537 KlassHandle(THREAD, h_throwable->klass()),
1538 vmSymbols::getCause_name(),
1539 vmSymbols::void_throwable_signature(),
1540 THREAD);
1541 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1542 if (HAS_PENDING_EXCEPTION) {
1543 CLEAR_PENDING_EXCEPTION;
1544 h_throwable = Handle();
1545 } else {
1546 h_throwable = Handle(THREAD, (oop) cause.get_jobject());
1547 if (h_throwable.not_null()) {
1548 st->print("Caused by: ");
1549 print(h_throwable, st);
1550 st->cr();
1551 }
1552 }
1553 }
1554 }
1555 }
1557 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) {
1558 if (!StackTraceInThrowable) return;
1559 ResourceMark rm(THREAD);
1561 // Start out by clearing the backtrace for this object, in case the VM
1562 // runs out of memory while allocating the stack trace
1563 set_backtrace(throwable(), NULL);
1564 if (JDK_Version::is_gte_jdk14x_version()) {
1565 // New since 1.4, clear lazily constructed Java level stacktrace if
1566 // refilling occurs
1567 // This is unnecessary in 1.7+ but harmless
1568 clear_stacktrace(throwable());
1569 }
1571 int max_depth = MaxJavaStackTraceDepth;
1572 JavaThread* thread = (JavaThread*)THREAD;
1573 BacktraceBuilder bt(CHECK);
1575 // If there is no Java frame just return the method that was being called
1576 // with bci 0
1577 if (!thread->has_last_Java_frame()) {
1578 if (max_depth >= 1 && method() != NULL) {
1579 bt.push(method(), 0, CHECK);
1580 set_backtrace(throwable(), bt.backtrace());
1581 }
1582 return;
1583 }
1585 // Instead of using vframe directly, this version of fill_in_stack_trace
1586 // basically handles everything by hand. This significantly improved the
1587 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1588 // See bug 6333838 for more details.
1589 // The "ASSERT" here is to verify this method generates the exactly same stack
1590 // trace as utilizing vframe.
1591 #ifdef ASSERT
1592 vframeStream st(thread);
1593 methodHandle st_method(THREAD, st.method());
1594 #endif
1595 int total_count = 0;
1596 RegisterMap map(thread, false);
1597 int decode_offset = 0;
1598 nmethod* nm = NULL;
1599 bool skip_fillInStackTrace_check = false;
1600 bool skip_throwableInit_check = false;
1601 bool skip_hidden = !ShowHiddenFrames;
1603 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1604 Method* method = NULL;
1605 int bci = 0;
1607 // Compiled java method case.
1608 if (decode_offset != 0) {
1609 DebugInfoReadStream stream(nm, decode_offset);
1610 decode_offset = stream.read_int();
1611 method = (Method*)nm->metadata_at(stream.read_int());
1612 bci = stream.read_bci();
1613 } else {
1614 if (fr.is_first_frame()) break;
1615 address pc = fr.pc();
1616 if (fr.is_interpreted_frame()) {
1617 intptr_t bcx = fr.interpreter_frame_bcx();
1618 method = fr.interpreter_frame_method();
1619 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
1620 fr = fr.sender(&map);
1621 } else {
1622 CodeBlob* cb = fr.cb();
1623 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1624 // but non nmethod
1625 fr = fr.sender(&map);
1626 if (cb == NULL || !cb->is_nmethod()) {
1627 continue;
1628 }
1629 nm = (nmethod*)cb;
1630 if (nm->method()->is_native()) {
1631 method = nm->method();
1632 bci = 0;
1633 } else {
1634 PcDesc* pd = nm->pc_desc_at(pc);
1635 decode_offset = pd->scope_decode_offset();
1636 // if decode_offset is not equal to 0, it will execute the
1637 // "compiled java method case" at the beginning of the loop.
1638 continue;
1639 }
1640 }
1641 }
1642 #ifdef ASSERT
1643 assert(st_method() == method && st.bci() == bci,
1644 "Wrong stack trace");
1645 st.next();
1646 // vframeStream::method isn't GC-safe so store off a copy
1647 // of the Method* in case we GC.
1648 if (!st.at_end()) {
1649 st_method = st.method();
1650 }
1651 #endif
1653 // the format of the stacktrace will be:
1654 // - 1 or more fillInStackTrace frames for the exception class (skipped)
1655 // - 0 or more <init> methods for the exception class (skipped)
1656 // - rest of the stack
1658 if (!skip_fillInStackTrace_check) {
1659 if ((method->name() == vmSymbols::fillInStackTrace_name() ||
1660 method->name() == vmSymbols::fillInStackTrace0_name()) &&
1661 throwable->is_a(method->method_holder())) {
1662 continue;
1663 }
1664 else {
1665 skip_fillInStackTrace_check = true; // gone past them all
1666 }
1667 }
1668 if (!skip_throwableInit_check) {
1669 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1671 // skip <init> methods of the exception class and superclasses
1672 // This is simlar to classic VM.
1673 if (method->name() == vmSymbols::object_initializer_name() &&
1674 throwable->is_a(method->method_holder())) {
1675 continue;
1676 } else {
1677 // there are none or we've seen them all - either way stop checking
1678 skip_throwableInit_check = true;
1679 }
1680 }
1681 if (method->is_hidden()) {
1682 if (skip_hidden) continue;
1683 }
1684 bt.push(method, bci, CHECK);
1685 total_count++;
1686 }
1688 // Put completed stack trace into throwable object
1689 set_backtrace(throwable(), bt.backtrace());
1690 }
1692 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) {
1693 // No-op if stack trace is disabled
1694 if (!StackTraceInThrowable) {
1695 return;
1696 }
1698 // Disable stack traces for some preallocated out of memory errors
1699 if (!Universe::should_fill_in_stack_trace(throwable)) {
1700 return;
1701 }
1703 PRESERVE_EXCEPTION_MARK;
1705 JavaThread* thread = JavaThread::active();
1706 fill_in_stack_trace(throwable, method, thread);
1707 // ignore exceptions thrown during stack trace filling
1708 CLEAR_PENDING_EXCEPTION;
1709 }
1711 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1712 // Allocate stack trace - backtrace is created but not filled in
1714 // No-op if stack trace is disabled
1715 if (!StackTraceInThrowable) return;
1716 BacktraceBuilder bt(CHECK); // creates a backtrace
1717 set_backtrace(throwable(), bt.backtrace());
1718 }
1721 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1722 // Fill in stack trace into preallocated backtrace (no GC)
1724 // No-op if stack trace is disabled
1725 if (!StackTraceInThrowable) return;
1727 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1729 JavaThread* THREAD = JavaThread::current();
1731 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
1732 assert(backtrace.not_null(), "backtrace should have been preallocated");
1734 ResourceMark rm(THREAD);
1735 vframeStream st(THREAD);
1737 BacktraceBuilder bt(backtrace);
1739 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1740 // methods as preallocated errors aren't created by "java" code.
1742 // fill in as much stack trace as possible
1743 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace);
1744 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1745 int chunk_count = 0;
1747 for (;!st.at_end(); st.next()) {
1748 bt.push(st.method(), st.bci(), CHECK);
1749 chunk_count++;
1751 // Bail-out for deep stacks
1752 if (chunk_count >= max_chunks) break;
1753 }
1755 // For Java 7+ we support the Throwable immutability protocol defined for Java 7. This support
1756 // was missing in 7u0 so in 7u0 there is a workaround in the Throwable class. That workaround
1757 // can be removed in a JDK using this JVM version
1758 if (JDK_Version::is_gte_jdk17x_version()) {
1759 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
1760 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
1761 }
1762 }
1765 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1766 if (throwable == NULL) {
1767 THROW_0(vmSymbols::java_lang_NullPointerException());
1768 }
1769 objArrayOop chunk = objArrayOop(backtrace(throwable));
1770 int depth = 0;
1771 if (chunk != NULL) {
1772 // Iterate over chunks and count full ones
1773 while (true) {
1774 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1775 if (next == NULL) break;
1776 depth += trace_chunk_size;
1777 chunk = next;
1778 }
1779 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1780 // Count element in remaining partial chunk. NULL value for mirror
1781 // marks the end of the stack trace elements that are saved.
1782 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1783 assert(mirrors != NULL, "sanity check");
1784 for (int i = 0; i < mirrors->length(); i++) {
1785 if (mirrors->obj_at(i) == NULL) break;
1786 depth++;
1787 }
1788 }
1789 return depth;
1790 }
1793 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1794 if (throwable == NULL) {
1795 THROW_0(vmSymbols::java_lang_NullPointerException());
1796 }
1797 if (index < 0) {
1798 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1799 }
1800 // Compute how many chunks to skip and index into actual chunk
1801 objArrayOop chunk = objArrayOop(backtrace(throwable));
1802 int skip_chunks = index / trace_chunk_size;
1803 int chunk_index = index % trace_chunk_size;
1804 while (chunk != NULL && skip_chunks > 0) {
1805 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1806 skip_chunks--;
1807 }
1808 if (chunk == NULL) {
1809 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1810 }
1811 // Get method id, bci, version and mirror from chunk
1812 typeArrayOop methods = BacktraceBuilder::get_methods(chunk);
1813 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk);
1814 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1816 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check");
1818 int method = methods->short_at(chunk_index);
1819 int version = version_at(bcis->int_at(chunk_index));
1820 int bci = bci_at(bcis->int_at(chunk_index));
1821 Handle mirror(THREAD, mirrors->obj_at(chunk_index));
1823 // Chunk can be partial full
1824 if (mirror.is_null()) {
1825 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1826 }
1828 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, CHECK_0);
1829 return element;
1830 }
1832 oop java_lang_StackTraceElement::create(Handle mirror, int method_id,
1833 int version, int bci, TRAPS) {
1834 // Allocate java.lang.StackTraceElement instance
1835 Klass* k = SystemDictionary::StackTraceElement_klass();
1836 assert(k != NULL, "must be loaded in 1.4+");
1837 instanceKlassHandle ik (THREAD, k);
1838 if (ik->should_be_initialized()) {
1839 ik->initialize(CHECK_0);
1840 }
1842 Handle element = ik->allocate_instance_handle(CHECK_0);
1843 // Fill in class name
1844 ResourceMark rm(THREAD);
1845 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1846 const char* str = holder->external_name();
1847 oop classname = StringTable::intern((char*) str, CHECK_0);
1848 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1850 Method* method = holder->method_with_idnum(method_id);
1851 // Method on stack may be obsolete because it was redefined so cannot be
1852 // found by idnum.
1853 if (method == NULL) {
1854 // leave name and fileName null
1855 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1856 return element();
1857 }
1859 // Fill in method name
1860 oop methodname = StringTable::intern(method->name(), CHECK_0);
1861 java_lang_StackTraceElement::set_methodName(element(), methodname);
1863 if (!version_matches(method, version)) {
1864 // The method was redefined, accurate line number information isn't available
1865 java_lang_StackTraceElement::set_fileName(element(), NULL);
1866 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1867 } else {
1868 // Fill in source file name and line number.
1869 Symbol* source = holder->source_file_name();
1870 if (ShowHiddenFrames && source == NULL)
1871 source = vmSymbols::unknown_class_name();
1872 oop filename = StringTable::intern(source, CHECK_0);
1873 java_lang_StackTraceElement::set_fileName(element(), filename);
1875 int line_number = get_line_number(method, bci);
1876 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1877 }
1878 return element();
1879 }
1881 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1882 Handle mirror (THREAD, method->method_holder()->java_mirror());
1883 int method_id = method->method_idnum();
1884 return create(mirror, method_id, method->constants()->version(), bci, THREAD);
1885 }
1887 void java_lang_reflect_AccessibleObject::compute_offsets() {
1888 Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
1889 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1890 }
1892 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1893 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1894 return (jboolean) reflect->bool_field(override_offset);
1895 }
1897 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1898 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1899 reflect->bool_field_put(override_offset, (int) value);
1900 }
1902 void java_lang_reflect_Method::compute_offsets() {
1903 Klass* k = SystemDictionary::reflect_Method_klass();
1904 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1905 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1906 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1907 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1908 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1909 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1910 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1911 // The generic signature and annotations fields are only present in 1.5
1912 signature_offset = -1;
1913 annotations_offset = -1;
1914 parameter_annotations_offset = -1;
1915 annotation_default_offset = -1;
1916 type_annotations_offset = -1;
1917 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1918 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1919 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1920 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1921 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
1922 }
1924 Handle java_lang_reflect_Method::create(TRAPS) {
1925 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1926 Klass* klass = SystemDictionary::reflect_Method_klass();
1927 // This class is eagerly initialized during VM initialization, since we keep a refence
1928 // to one of the methods
1929 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
1930 return InstanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH);
1931 }
1933 oop java_lang_reflect_Method::clazz(oop reflect) {
1934 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1935 return reflect->obj_field(clazz_offset);
1936 }
1938 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1939 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1940 reflect->obj_field_put(clazz_offset, value);
1941 }
1943 int java_lang_reflect_Method::slot(oop reflect) {
1944 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1945 return reflect->int_field(slot_offset);
1946 }
1948 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1949 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1950 reflect->int_field_put(slot_offset, value);
1951 }
1953 oop java_lang_reflect_Method::name(oop method) {
1954 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1955 return method->obj_field(name_offset);
1956 }
1958 void java_lang_reflect_Method::set_name(oop method, oop value) {
1959 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1960 method->obj_field_put(name_offset, value);
1961 }
1963 oop java_lang_reflect_Method::return_type(oop method) {
1964 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1965 return method->obj_field(returnType_offset);
1966 }
1968 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
1969 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1970 method->obj_field_put(returnType_offset, value);
1971 }
1973 oop java_lang_reflect_Method::parameter_types(oop method) {
1974 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1975 return method->obj_field(parameterTypes_offset);
1976 }
1978 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
1979 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1980 method->obj_field_put(parameterTypes_offset, value);
1981 }
1983 oop java_lang_reflect_Method::exception_types(oop method) {
1984 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1985 return method->obj_field(exceptionTypes_offset);
1986 }
1988 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
1989 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1990 method->obj_field_put(exceptionTypes_offset, value);
1991 }
1993 int java_lang_reflect_Method::modifiers(oop method) {
1994 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1995 return method->int_field(modifiers_offset);
1996 }
1998 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
1999 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2000 method->int_field_put(modifiers_offset, value);
2001 }
2003 bool java_lang_reflect_Method::has_signature_field() {
2004 return (signature_offset >= 0);
2005 }
2007 oop java_lang_reflect_Method::signature(oop method) {
2008 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2009 assert(has_signature_field(), "signature field must be present");
2010 return method->obj_field(signature_offset);
2011 }
2013 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2014 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2015 assert(has_signature_field(), "signature field must be present");
2016 method->obj_field_put(signature_offset, value);
2017 }
2019 bool java_lang_reflect_Method::has_annotations_field() {
2020 return (annotations_offset >= 0);
2021 }
2023 oop java_lang_reflect_Method::annotations(oop method) {
2024 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2025 assert(has_annotations_field(), "annotations field must be present");
2026 return method->obj_field(annotations_offset);
2027 }
2029 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2030 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2031 assert(has_annotations_field(), "annotations field must be present");
2032 method->obj_field_put(annotations_offset, value);
2033 }
2035 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2036 return (parameter_annotations_offset >= 0);
2037 }
2039 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2040 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2041 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2042 return method->obj_field(parameter_annotations_offset);
2043 }
2045 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2046 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2047 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2048 method->obj_field_put(parameter_annotations_offset, value);
2049 }
2051 bool java_lang_reflect_Method::has_annotation_default_field() {
2052 return (annotation_default_offset >= 0);
2053 }
2055 oop java_lang_reflect_Method::annotation_default(oop method) {
2056 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2057 assert(has_annotation_default_field(), "annotation default field must be present");
2058 return method->obj_field(annotation_default_offset);
2059 }
2061 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2062 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2063 assert(has_annotation_default_field(), "annotation default field must be present");
2064 method->obj_field_put(annotation_default_offset, value);
2065 }
2067 bool java_lang_reflect_Method::has_type_annotations_field() {
2068 return (type_annotations_offset >= 0);
2069 }
2071 oop java_lang_reflect_Method::type_annotations(oop method) {
2072 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2073 assert(has_type_annotations_field(), "type_annotations field must be present");
2074 return method->obj_field(type_annotations_offset);
2075 }
2077 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2078 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2079 assert(has_type_annotations_field(), "type_annotations field must be present");
2080 method->obj_field_put(type_annotations_offset, value);
2081 }
2083 void java_lang_reflect_Constructor::compute_offsets() {
2084 Klass* k = SystemDictionary::reflect_Constructor_klass();
2085 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2086 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2087 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2088 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2089 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2090 // The generic signature and annotations fields are only present in 1.5
2091 signature_offset = -1;
2092 annotations_offset = -1;
2093 parameter_annotations_offset = -1;
2094 type_annotations_offset = -1;
2095 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2096 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2097 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2098 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2099 }
2101 Handle java_lang_reflect_Constructor::create(TRAPS) {
2102 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2103 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2104 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2105 instanceKlassHandle klass (THREAD, k);
2106 // Ensure it is initialized
2107 klass->initialize(CHECK_NH);
2108 return klass->allocate_instance_handle(CHECK_NH);
2109 }
2111 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2112 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2113 return reflect->obj_field(clazz_offset);
2114 }
2116 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2117 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2118 reflect->obj_field_put(clazz_offset, value);
2119 }
2121 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2122 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2123 return constructor->obj_field(parameterTypes_offset);
2124 }
2126 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2127 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2128 constructor->obj_field_put(parameterTypes_offset, value);
2129 }
2131 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2132 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2133 return constructor->obj_field(exceptionTypes_offset);
2134 }
2136 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2137 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2138 constructor->obj_field_put(exceptionTypes_offset, value);
2139 }
2141 int java_lang_reflect_Constructor::slot(oop reflect) {
2142 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2143 return reflect->int_field(slot_offset);
2144 }
2146 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2147 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2148 reflect->int_field_put(slot_offset, value);
2149 }
2151 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2152 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2153 return constructor->int_field(modifiers_offset);
2154 }
2156 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2157 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2158 constructor->int_field_put(modifiers_offset, value);
2159 }
2161 bool java_lang_reflect_Constructor::has_signature_field() {
2162 return (signature_offset >= 0);
2163 }
2165 oop java_lang_reflect_Constructor::signature(oop constructor) {
2166 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2167 assert(has_signature_field(), "signature field must be present");
2168 return constructor->obj_field(signature_offset);
2169 }
2171 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2172 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2173 assert(has_signature_field(), "signature field must be present");
2174 constructor->obj_field_put(signature_offset, value);
2175 }
2177 bool java_lang_reflect_Constructor::has_annotations_field() {
2178 return (annotations_offset >= 0);
2179 }
2181 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2182 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2183 assert(has_annotations_field(), "annotations field must be present");
2184 return constructor->obj_field(annotations_offset);
2185 }
2187 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2188 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2189 assert(has_annotations_field(), "annotations field must be present");
2190 constructor->obj_field_put(annotations_offset, value);
2191 }
2193 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2194 return (parameter_annotations_offset >= 0);
2195 }
2197 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2198 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2199 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2200 return method->obj_field(parameter_annotations_offset);
2201 }
2203 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2204 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2205 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2206 method->obj_field_put(parameter_annotations_offset, value);
2207 }
2209 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2210 return (type_annotations_offset >= 0);
2211 }
2213 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2214 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2215 assert(has_type_annotations_field(), "type_annotations field must be present");
2216 return constructor->obj_field(type_annotations_offset);
2217 }
2219 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2220 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2221 assert(has_type_annotations_field(), "type_annotations field must be present");
2222 constructor->obj_field_put(type_annotations_offset, value);
2223 }
2225 void java_lang_reflect_Field::compute_offsets() {
2226 Klass* k = SystemDictionary::reflect_Field_klass();
2227 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2228 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2229 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
2230 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2231 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2232 // The generic signature and annotations fields are only present in 1.5
2233 signature_offset = -1;
2234 annotations_offset = -1;
2235 type_annotations_offset = -1;
2236 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2237 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2238 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2239 }
2241 Handle java_lang_reflect_Field::create(TRAPS) {
2242 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2243 Symbol* name = vmSymbols::java_lang_reflect_Field();
2244 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2245 instanceKlassHandle klass (THREAD, k);
2246 // Ensure it is initialized
2247 klass->initialize(CHECK_NH);
2248 return klass->allocate_instance_handle(CHECK_NH);
2249 }
2251 oop java_lang_reflect_Field::clazz(oop reflect) {
2252 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2253 return reflect->obj_field(clazz_offset);
2254 }
2256 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2257 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2258 reflect->obj_field_put(clazz_offset, value);
2259 }
2261 oop java_lang_reflect_Field::name(oop field) {
2262 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2263 return field->obj_field(name_offset);
2264 }
2266 void java_lang_reflect_Field::set_name(oop field, oop value) {
2267 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2268 field->obj_field_put(name_offset, value);
2269 }
2271 oop java_lang_reflect_Field::type(oop field) {
2272 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2273 return field->obj_field(type_offset);
2274 }
2276 void java_lang_reflect_Field::set_type(oop field, oop value) {
2277 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2278 field->obj_field_put(type_offset, value);
2279 }
2281 int java_lang_reflect_Field::slot(oop reflect) {
2282 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2283 return reflect->int_field(slot_offset);
2284 }
2286 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2287 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2288 reflect->int_field_put(slot_offset, value);
2289 }
2291 int java_lang_reflect_Field::modifiers(oop field) {
2292 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2293 return field->int_field(modifiers_offset);
2294 }
2296 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2297 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2298 field->int_field_put(modifiers_offset, value);
2299 }
2301 bool java_lang_reflect_Field::has_signature_field() {
2302 return (signature_offset >= 0);
2303 }
2305 oop java_lang_reflect_Field::signature(oop field) {
2306 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2307 assert(has_signature_field(), "signature field must be present");
2308 return field->obj_field(signature_offset);
2309 }
2311 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2312 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2313 assert(has_signature_field(), "signature field must be present");
2314 field->obj_field_put(signature_offset, value);
2315 }
2317 bool java_lang_reflect_Field::has_annotations_field() {
2318 return (annotations_offset >= 0);
2319 }
2321 oop java_lang_reflect_Field::annotations(oop field) {
2322 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2323 assert(has_annotations_field(), "annotations field must be present");
2324 return field->obj_field(annotations_offset);
2325 }
2327 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2328 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2329 assert(has_annotations_field(), "annotations field must be present");
2330 field->obj_field_put(annotations_offset, value);
2331 }
2333 bool java_lang_reflect_Field::has_type_annotations_field() {
2334 return (type_annotations_offset >= 0);
2335 }
2337 oop java_lang_reflect_Field::type_annotations(oop field) {
2338 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2339 assert(has_type_annotations_field(), "type_annotations field must be present");
2340 return field->obj_field(type_annotations_offset);
2341 }
2343 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2344 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2345 assert(has_type_annotations_field(), "type_annotations field must be present");
2346 field->obj_field_put(type_annotations_offset, value);
2347 }
2349 void sun_reflect_ConstantPool::compute_offsets() {
2350 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2351 // This null test can be removed post beta
2352 if (k != NULL) {
2353 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2354 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2355 }
2356 }
2358 void java_lang_reflect_Parameter::compute_offsets() {
2359 Klass* k = SystemDictionary::reflect_Parameter_klass();
2360 if(NULL != k) {
2361 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2362 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2363 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature());
2364 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature());
2365 }
2366 }
2368 Handle java_lang_reflect_Parameter::create(TRAPS) {
2369 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2370 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2371 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2372 instanceKlassHandle klass (THREAD, k);
2373 // Ensure it is initialized
2374 klass->initialize(CHECK_NH);
2375 return klass->allocate_instance_handle(CHECK_NH);
2376 }
2378 oop java_lang_reflect_Parameter::name(oop param) {
2379 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2380 return param->obj_field(name_offset);
2381 }
2383 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2384 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2385 param->obj_field_put(name_offset, value);
2386 }
2388 int java_lang_reflect_Parameter::modifiers(oop param) {
2389 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2390 return param->int_field(modifiers_offset);
2391 }
2393 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2394 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2395 param->int_field_put(modifiers_offset, value);
2396 }
2398 int java_lang_reflect_Parameter::index(oop param) {
2399 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2400 return param->int_field(index_offset);
2401 }
2403 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2404 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2405 param->int_field_put(index_offset, value);
2406 }
2408 oop java_lang_reflect_Parameter::executable(oop param) {
2409 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2410 return param->obj_field(executable_offset);
2411 }
2413 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2414 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2415 param->obj_field_put(executable_offset, value);
2416 }
2419 Handle sun_reflect_ConstantPool::create(TRAPS) {
2420 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2421 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2422 instanceKlassHandle klass (THREAD, k);
2423 // Ensure it is initialized
2424 klass->initialize(CHECK_NH);
2425 return klass->allocate_instance_handle(CHECK_NH);
2426 }
2429 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2430 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2431 oop mirror = value->pool_holder()->java_mirror();
2432 // Save the mirror to get back the constant pool.
2433 reflect->obj_field_put(_oop_offset, mirror);
2434 }
2436 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) {
2437 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2439 oop mirror = reflect->obj_field(_oop_offset);
2440 Klass* k = java_lang_Class::as_Klass(mirror);
2441 assert(k->oop_is_instance(), "Must be");
2443 // Get the constant pool back from the klass. Since class redefinition
2444 // merges the new constant pool into the old, this is essentially the
2445 // same constant pool as the original. If constant pool merging is
2446 // no longer done in the future, this will have to change to save
2447 // the original.
2448 return InstanceKlass::cast(k)->constants();
2449 }
2451 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2452 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2453 // This null test can be removed post beta
2454 if (k != NULL) {
2455 compute_offset(_base_offset, k,
2456 vmSymbols::base_name(), vmSymbols::object_signature());
2457 }
2458 }
2460 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2461 Klass* k = SystemDictionary::box_klass(type);
2462 if (k == NULL) return NULL;
2463 instanceKlassHandle h (THREAD, k);
2464 if (!h->is_initialized()) h->initialize(CHECK_0);
2465 return h->allocate_instance(THREAD);
2466 }
2469 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2470 oop box = initialize_and_allocate(type, CHECK_0);
2471 if (box == NULL) return NULL;
2472 switch (type) {
2473 case T_BOOLEAN:
2474 box->bool_field_put(value_offset, value->z);
2475 break;
2476 case T_CHAR:
2477 box->char_field_put(value_offset, value->c);
2478 break;
2479 case T_FLOAT:
2480 box->float_field_put(value_offset, value->f);
2481 break;
2482 case T_DOUBLE:
2483 box->double_field_put(long_value_offset, value->d);
2484 break;
2485 case T_BYTE:
2486 box->byte_field_put(value_offset, value->b);
2487 break;
2488 case T_SHORT:
2489 box->short_field_put(value_offset, value->s);
2490 break;
2491 case T_INT:
2492 box->int_field_put(value_offset, value->i);
2493 break;
2494 case T_LONG:
2495 box->long_field_put(long_value_offset, value->j);
2496 break;
2497 default:
2498 return NULL;
2499 }
2500 return box;
2501 }
2504 BasicType java_lang_boxing_object::basic_type(oop box) {
2505 if (box == NULL) return T_ILLEGAL;
2506 BasicType type = SystemDictionary::box_klass_type(box->klass());
2507 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2508 return T_ILLEGAL;
2509 return type;
2510 }
2513 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2514 BasicType type = SystemDictionary::box_klass_type(box->klass());
2515 switch (type) {
2516 case T_BOOLEAN:
2517 value->z = box->bool_field(value_offset);
2518 break;
2519 case T_CHAR:
2520 value->c = box->char_field(value_offset);
2521 break;
2522 case T_FLOAT:
2523 value->f = box->float_field(value_offset);
2524 break;
2525 case T_DOUBLE:
2526 value->d = box->double_field(long_value_offset);
2527 break;
2528 case T_BYTE:
2529 value->b = box->byte_field(value_offset);
2530 break;
2531 case T_SHORT:
2532 value->s = box->short_field(value_offset);
2533 break;
2534 case T_INT:
2535 value->i = box->int_field(value_offset);
2536 break;
2537 case T_LONG:
2538 value->j = box->long_field(long_value_offset);
2539 break;
2540 default:
2541 return T_ILLEGAL;
2542 } // end switch
2543 return type;
2544 }
2547 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2548 BasicType type = SystemDictionary::box_klass_type(box->klass());
2549 switch (type) {
2550 case T_BOOLEAN:
2551 box->bool_field_put(value_offset, value->z);
2552 break;
2553 case T_CHAR:
2554 box->char_field_put(value_offset, value->c);
2555 break;
2556 case T_FLOAT:
2557 box->float_field_put(value_offset, value->f);
2558 break;
2559 case T_DOUBLE:
2560 box->double_field_put(long_value_offset, value->d);
2561 break;
2562 case T_BYTE:
2563 box->byte_field_put(value_offset, value->b);
2564 break;
2565 case T_SHORT:
2566 box->short_field_put(value_offset, value->s);
2567 break;
2568 case T_INT:
2569 box->int_field_put(value_offset, value->i);
2570 break;
2571 case T_LONG:
2572 box->long_field_put(long_value_offset, value->j);
2573 break;
2574 default:
2575 return T_ILLEGAL;
2576 } // end switch
2577 return type;
2578 }
2581 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2582 switch (type) {
2583 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2584 case T_CHAR: st->print("%d", value->c); break;
2585 case T_BYTE: st->print("%d", value->b); break;
2586 case T_SHORT: st->print("%d", value->s); break;
2587 case T_INT: st->print("%d", value->i); break;
2588 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2589 case T_FLOAT: st->print("%f", value->f); break;
2590 case T_DOUBLE: st->print("%lf", value->d); break;
2591 default: st->print("type %d?", type); break;
2592 }
2593 }
2596 // Support for java_lang_ref_Reference
2597 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() {
2598 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2599 address addr = ik->static_field_addr(static_lock_offset);
2600 return (HeapWord*) addr;
2601 }
2603 oop java_lang_ref_Reference::pending_list_lock() {
2604 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2605 address addr = ik->static_field_addr(static_lock_offset);
2606 if (UseCompressedOops) {
2607 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2608 } else {
2609 return oopDesc::load_decode_heap_oop((oop*)addr);
2610 }
2611 }
2613 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2614 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2615 address addr = ik->static_field_addr(static_pending_offset);
2616 // XXX This might not be HeapWord aligned, almost rather be char *.
2617 return (HeapWord*)addr;
2618 }
2620 oop java_lang_ref_Reference::pending_list() {
2621 char *addr = (char *)pending_list_addr();
2622 if (UseCompressedOops) {
2623 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2624 } else {
2625 return oopDesc::load_decode_heap_oop((oop*)addr);
2626 }
2627 }
2630 // Support for java_lang_ref_SoftReference
2632 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2633 return ref->long_field(timestamp_offset);
2634 }
2636 jlong java_lang_ref_SoftReference::clock() {
2637 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2638 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2639 return *offset;
2640 }
2642 void java_lang_ref_SoftReference::set_clock(jlong value) {
2643 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2644 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2645 *offset = value;
2646 }
2648 // Support for java_lang_invoke_DirectMethodHandle
2650 int java_lang_invoke_DirectMethodHandle::_member_offset;
2652 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
2653 oop member_name = NULL;
2654 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
2655 assert(is_dmh, "a DirectMethodHandle oop is expected");
2656 if (is_dmh) {
2657 member_name = dmh->obj_field(member_offset_in_bytes());
2658 }
2659 return member_name;
2660 }
2662 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
2663 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
2664 if (klass_oop != NULL && EnableInvokeDynamic) {
2665 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2666 }
2667 }
2669 // Support for java_lang_invoke_MethodHandle
2671 int java_lang_invoke_MethodHandle::_type_offset;
2672 int java_lang_invoke_MethodHandle::_form_offset;
2674 int java_lang_invoke_MemberName::_clazz_offset;
2675 int java_lang_invoke_MemberName::_name_offset;
2676 int java_lang_invoke_MemberName::_type_offset;
2677 int java_lang_invoke_MemberName::_flags_offset;
2678 int java_lang_invoke_MemberName::_vmtarget_offset;
2679 int java_lang_invoke_MemberName::_vmloader_offset;
2680 int java_lang_invoke_MemberName::_vmindex_offset;
2682 int java_lang_invoke_LambdaForm::_vmentry_offset;
2684 void java_lang_invoke_MethodHandle::compute_offsets() {
2685 Klass* klass_oop = SystemDictionary::MethodHandle_klass();
2686 if (klass_oop != NULL && EnableInvokeDynamic) {
2687 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
2688 compute_optional_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
2689 if (_form_offset == 0) {
2690 EnableInvokeDynamic = false;
2691 }
2692 }
2693 }
2695 void java_lang_invoke_MemberName::compute_offsets() {
2696 Klass* klass_oop = SystemDictionary::MemberName_klass();
2697 if (klass_oop != NULL && EnableInvokeDynamic) {
2698 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature());
2699 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature());
2700 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature());
2701 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature());
2702 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2703 }
2704 }
2706 void java_lang_invoke_LambdaForm::compute_offsets() {
2707 Klass* klass_oop = SystemDictionary::LambdaForm_klass();
2708 if (klass_oop != NULL && EnableInvokeDynamic) {
2709 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2710 }
2711 }
2713 oop java_lang_invoke_MethodHandle::type(oop mh) {
2714 return mh->obj_field(_type_offset);
2715 }
2717 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
2718 mh->obj_field_put(_type_offset, mtype);
2719 }
2721 oop java_lang_invoke_MethodHandle::form(oop mh) {
2722 assert(_form_offset != 0, "");
2723 return mh->obj_field(_form_offset);
2724 }
2726 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
2727 assert(_form_offset != 0, "");
2728 mh->obj_field_put(_form_offset, lform);
2729 }
2731 /// MemberName accessors
2733 oop java_lang_invoke_MemberName::clazz(oop mname) {
2734 assert(is_instance(mname), "wrong type");
2735 return mname->obj_field(_clazz_offset);
2736 }
2738 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
2739 assert(is_instance(mname), "wrong type");
2740 mname->obj_field_put(_clazz_offset, clazz);
2741 }
2743 oop java_lang_invoke_MemberName::name(oop mname) {
2744 assert(is_instance(mname), "wrong type");
2745 return mname->obj_field(_name_offset);
2746 }
2748 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
2749 assert(is_instance(mname), "wrong type");
2750 mname->obj_field_put(_name_offset, name);
2751 }
2753 oop java_lang_invoke_MemberName::type(oop mname) {
2754 assert(is_instance(mname), "wrong type");
2755 return mname->obj_field(_type_offset);
2756 }
2758 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
2759 assert(is_instance(mname), "wrong type");
2760 mname->obj_field_put(_type_offset, type);
2761 }
2763 int java_lang_invoke_MemberName::flags(oop mname) {
2764 assert(is_instance(mname), "wrong type");
2765 return mname->int_field(_flags_offset);
2766 }
2768 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
2769 assert(is_instance(mname), "wrong type");
2770 mname->int_field_put(_flags_offset, flags);
2771 }
2773 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
2774 assert(is_instance(mname), "wrong type");
2775 return (Metadata*)mname->address_field(_vmtarget_offset);
2776 }
2778 #if INCLUDE_JVMTI
2779 // Can be executed on VM thread only
2780 void java_lang_invoke_MemberName::adjust_vmtarget(oop mname, Metadata* ref) {
2781 assert((is_instance(mname) && (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0), "wrong type");
2782 assert(Thread::current()->is_VM_thread(), "not VM thread");
2783 mname->address_field_put(_vmtarget_offset, (address)ref);
2784 }
2785 #endif // INCLUDE_JVMTI
2787 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
2788 assert(is_instance(mname), "wrong type");
2789 // check the type of the vmtarget
2790 oop dependency = NULL;
2791 if (ref != NULL) {
2792 switch (flags(mname) & (MN_IS_METHOD |
2793 MN_IS_CONSTRUCTOR |
2794 MN_IS_FIELD)) {
2795 case MN_IS_METHOD:
2796 case MN_IS_CONSTRUCTOR:
2797 assert(ref->is_method(), "should be a method");
2798 dependency = ((Method*)ref)->method_holder()->java_mirror();
2799 break;
2800 case MN_IS_FIELD:
2801 assert(ref->is_klass(), "should be a class");
2802 dependency = ((Klass*)ref)->java_mirror();
2803 break;
2804 default:
2805 ShouldNotReachHere();
2806 }
2807 }
2808 mname->address_field_put(_vmtarget_offset, (address)ref);
2809 // Add a reference to the loader (actually mirror because anonymous classes will not have
2810 // distinct loaders) to ensure the metadata is kept alive
2811 // This mirror may be different than the one in clazz field.
2812 mname->obj_field_put(_vmloader_offset, dependency);
2813 }
2815 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
2816 assert(is_instance(mname), "wrong type");
2817 return (intptr_t) mname->address_field(_vmindex_offset);
2818 }
2820 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
2821 assert(is_instance(mname), "wrong type");
2822 mname->address_field_put(_vmindex_offset, (address) index);
2823 }
2825 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
2826 assert(is_instance(lform), "wrong type");
2827 return lform->obj_field(_vmentry_offset);
2828 }
2831 // Support for java_lang_invoke_MethodType
2833 int java_lang_invoke_MethodType::_rtype_offset;
2834 int java_lang_invoke_MethodType::_ptypes_offset;
2836 void java_lang_invoke_MethodType::compute_offsets() {
2837 Klass* k = SystemDictionary::MethodType_klass();
2838 if (k != NULL) {
2839 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2840 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2841 }
2842 }
2844 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
2845 st->print("(");
2846 objArrayOop pts = ptypes(mt);
2847 for (int i = 0, limit = pts->length(); i < limit; i++) {
2848 java_lang_Class::print_signature(pts->obj_at(i), st);
2849 }
2850 st->print(")");
2851 java_lang_Class::print_signature(rtype(mt), st);
2852 }
2854 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2855 ResourceMark rm;
2856 stringStream buffer(128);
2857 print_signature(mt, &buffer);
2858 const char* sigstr = buffer.base();
2859 int siglen = (int) buffer.size();
2860 Symbol *name;
2861 if (!intern_if_not_found) {
2862 name = SymbolTable::probe(sigstr, siglen);
2863 } else {
2864 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2865 }
2866 return name;
2867 }
2869 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
2870 if (mt1 == mt2)
2871 return true;
2872 if (rtype(mt1) != rtype(mt2))
2873 return false;
2874 if (ptype_count(mt1) != ptype_count(mt2))
2875 return false;
2876 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
2877 if (ptype(mt1, i) != ptype(mt2, i))
2878 return false;
2879 }
2880 return true;
2881 }
2883 oop java_lang_invoke_MethodType::rtype(oop mt) {
2884 assert(is_instance(mt), "must be a MethodType");
2885 return mt->obj_field(_rtype_offset);
2886 }
2888 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
2889 assert(is_instance(mt), "must be a MethodType");
2890 return (objArrayOop) mt->obj_field(_ptypes_offset);
2891 }
2893 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
2894 return ptypes(mt)->obj_at(idx);
2895 }
2897 int java_lang_invoke_MethodType::ptype_count(oop mt) {
2898 return ptypes(mt)->length();
2899 }
2901 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
2902 objArrayOop pts = ptypes(mt);
2903 int count = pts->length();
2904 int slots = 0;
2905 for (int i = 0; i < count; i++) {
2906 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
2907 slots += type2size[bt];
2908 }
2909 return slots;
2910 }
2912 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
2913 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
2914 return type2size[bt];
2915 }
2918 // Support for java_lang_invoke_CallSite
2920 int java_lang_invoke_CallSite::_target_offset;
2922 void java_lang_invoke_CallSite::compute_offsets() {
2923 if (!EnableInvokeDynamic) return;
2924 Klass* k = SystemDictionary::CallSite_klass();
2925 if (k != NULL) {
2926 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
2927 }
2928 }
2931 // Support for java_security_AccessControlContext
2933 int java_security_AccessControlContext::_context_offset = 0;
2934 int java_security_AccessControlContext::_privilegedContext_offset = 0;
2935 int java_security_AccessControlContext::_isPrivileged_offset = 0;
2936 int java_security_AccessControlContext::_isAuthorized_offset = -1;
2938 void java_security_AccessControlContext::compute_offsets() {
2939 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
2940 fieldDescriptor fd;
2941 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass());
2943 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
2944 fatal("Invalid layout of java.security.AccessControlContext");
2945 }
2946 _context_offset = fd.offset();
2948 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
2949 fatal("Invalid layout of java.security.AccessControlContext");
2950 }
2951 _privilegedContext_offset = fd.offset();
2953 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
2954 fatal("Invalid layout of java.security.AccessControlContext");
2955 }
2956 _isPrivileged_offset = fd.offset();
2958 // The offset may not be present for bootstrapping with older JDK.
2959 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
2960 _isAuthorized_offset = fd.offset();
2961 }
2962 }
2965 bool java_security_AccessControlContext::is_authorized(Handle context) {
2966 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
2967 assert(_isAuthorized_offset != -1, "should be set");
2968 return context->bool_field(_isAuthorized_offset) != 0;
2969 }
2971 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
2972 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
2973 // Ensure klass is initialized
2974 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
2975 // Allocate result
2976 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
2977 // Fill in values
2978 result->obj_field_put(_context_offset, context());
2979 result->obj_field_put(_privilegedContext_offset, privileged_context());
2980 result->bool_field_put(_isPrivileged_offset, isPrivileged);
2981 // whitelist AccessControlContexts created by the JVM if present
2982 if (_isAuthorized_offset != -1) {
2983 result->bool_field_put(_isAuthorized_offset, true);
2984 }
2985 return result;
2986 }
2989 // Support for java_lang_ClassLoader
2991 bool java_lang_ClassLoader::offsets_computed = false;
2992 int java_lang_ClassLoader::_loader_data_offset = -1;
2993 int java_lang_ClassLoader::parallelCapable_offset = -1;
2995 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
2996 assert(loader != NULL && loader->is_oop(), "loader must be oop");
2997 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
2998 }
3000 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
3001 return *java_lang_ClassLoader::loader_data_addr(loader);
3002 }
3004 void java_lang_ClassLoader::compute_offsets() {
3005 assert(!offsets_computed, "offsets should be initialized only once");
3006 offsets_computed = true;
3008 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
3009 Klass* k1 = SystemDictionary::ClassLoader_klass();
3010 compute_optional_offset(parallelCapable_offset,
3011 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
3013 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3014 }
3016 oop java_lang_ClassLoader::parent(oop loader) {
3017 assert(is_instance(loader), "loader must be oop");
3018 return loader->obj_field(parent_offset);
3019 }
3021 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3022 assert(is_instance(loader), "loader must be oop");
3023 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3024 oop acl = loader;
3025 debug_only(jint loop_count = 0);
3026 // This loop taken verbatim from ClassLoader.java:
3027 do {
3028 acl = parent(acl);
3029 if (cl == acl) {
3030 return true;
3031 }
3032 assert(++loop_count > 0, "loop_count overflow");
3033 } while (acl != NULL);
3034 return false;
3035 }
3038 // For class loader classes, parallelCapable defined
3039 // based on non-null field
3040 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3041 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3042 if (!JDK_Version::is_gte_jdk17x_version()
3043 || parallelCapable_offset == -1) {
3044 // Default for backward compatibility is false
3045 return false;
3046 }
3047 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3048 }
3050 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3051 // Fix for 4474172; see evaluation for more details
3052 loader = non_reflection_class_loader(loader);
3054 oop cl = SystemDictionary::java_system_loader();
3055 while(cl != NULL) {
3056 if (cl == loader) return true;
3057 cl = parent(cl);
3058 }
3059 return false;
3060 }
3062 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3063 if (loader != NULL) {
3064 // See whether this is one of the class loaders associated with
3065 // the generated bytecodes for reflection, and if so, "magically"
3066 // delegate to its parent to prevent class loading from occurring
3067 // in places where applications using reflection didn't expect it.
3068 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3069 // This might be null in non-1.4 JDKs
3070 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
3071 return parent(loader);
3072 }
3073 }
3074 return loader;
3075 }
3078 // Support for java_lang_System
3079 int java_lang_System::in_offset_in_bytes() {
3080 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3081 }
3084 int java_lang_System::out_offset_in_bytes() {
3085 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3086 }
3089 int java_lang_System::err_offset_in_bytes() {
3090 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3091 }
3094 bool java_lang_System::has_security_manager() {
3095 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass());
3096 address addr = ik->static_field_addr(static_security_offset);
3097 if (UseCompressedOops) {
3098 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3099 } else {
3100 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3101 }
3102 }
3104 int java_lang_Class::_klass_offset;
3105 int java_lang_Class::_array_klass_offset;
3106 int java_lang_Class::_oop_size_offset;
3107 int java_lang_Class::_static_oop_field_count_offset;
3108 int java_lang_Class::_class_loader_offset;
3109 int java_lang_Class::_protection_domain_offset;
3110 int java_lang_Class::_init_lock_offset;
3111 int java_lang_Class::_signers_offset;
3112 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3113 int java_lang_Throwable::backtrace_offset;
3114 int java_lang_Throwable::detailMessage_offset;
3115 int java_lang_Throwable::cause_offset;
3116 int java_lang_Throwable::stackTrace_offset;
3117 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3118 int java_lang_reflect_AccessibleObject::override_offset;
3119 int java_lang_reflect_Method::clazz_offset;
3120 int java_lang_reflect_Method::name_offset;
3121 int java_lang_reflect_Method::returnType_offset;
3122 int java_lang_reflect_Method::parameterTypes_offset;
3123 int java_lang_reflect_Method::exceptionTypes_offset;
3124 int java_lang_reflect_Method::slot_offset;
3125 int java_lang_reflect_Method::modifiers_offset;
3126 int java_lang_reflect_Method::signature_offset;
3127 int java_lang_reflect_Method::annotations_offset;
3128 int java_lang_reflect_Method::parameter_annotations_offset;
3129 int java_lang_reflect_Method::annotation_default_offset;
3130 int java_lang_reflect_Method::type_annotations_offset;
3131 int java_lang_reflect_Constructor::clazz_offset;
3132 int java_lang_reflect_Constructor::parameterTypes_offset;
3133 int java_lang_reflect_Constructor::exceptionTypes_offset;
3134 int java_lang_reflect_Constructor::slot_offset;
3135 int java_lang_reflect_Constructor::modifiers_offset;
3136 int java_lang_reflect_Constructor::signature_offset;
3137 int java_lang_reflect_Constructor::annotations_offset;
3138 int java_lang_reflect_Constructor::parameter_annotations_offset;
3139 int java_lang_reflect_Constructor::type_annotations_offset;
3140 int java_lang_reflect_Field::clazz_offset;
3141 int java_lang_reflect_Field::name_offset;
3142 int java_lang_reflect_Field::type_offset;
3143 int java_lang_reflect_Field::slot_offset;
3144 int java_lang_reflect_Field::modifiers_offset;
3145 int java_lang_reflect_Field::signature_offset;
3146 int java_lang_reflect_Field::annotations_offset;
3147 int java_lang_reflect_Field::type_annotations_offset;
3148 int java_lang_reflect_Parameter::name_offset;
3149 int java_lang_reflect_Parameter::modifiers_offset;
3150 int java_lang_reflect_Parameter::index_offset;
3151 int java_lang_reflect_Parameter::executable_offset;
3152 int java_lang_boxing_object::value_offset;
3153 int java_lang_boxing_object::long_value_offset;
3154 int java_lang_ref_Reference::referent_offset;
3155 int java_lang_ref_Reference::queue_offset;
3156 int java_lang_ref_Reference::next_offset;
3157 int java_lang_ref_Reference::discovered_offset;
3158 int java_lang_ref_Reference::static_lock_offset;
3159 int java_lang_ref_Reference::static_pending_offset;
3160 int java_lang_ref_Reference::number_of_fake_oop_fields;
3161 int java_lang_ref_SoftReference::timestamp_offset;
3162 int java_lang_ref_SoftReference::static_clock_offset;
3163 int java_lang_ClassLoader::parent_offset;
3164 int java_lang_System::static_in_offset;
3165 int java_lang_System::static_out_offset;
3166 int java_lang_System::static_err_offset;
3167 int java_lang_System::static_security_offset;
3168 int java_lang_StackTraceElement::declaringClass_offset;
3169 int java_lang_StackTraceElement::methodName_offset;
3170 int java_lang_StackTraceElement::fileName_offset;
3171 int java_lang_StackTraceElement::lineNumber_offset;
3172 int java_lang_AssertionStatusDirectives::classes_offset;
3173 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3174 int java_lang_AssertionStatusDirectives::packages_offset;
3175 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3176 int java_lang_AssertionStatusDirectives::deflt_offset;
3177 int java_nio_Buffer::_limit_offset;
3178 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3179 int sun_reflect_ConstantPool::_oop_offset;
3180 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3183 // Support for java_lang_StackTraceElement
3185 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3186 element->obj_field_put(fileName_offset, value);
3187 }
3189 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3190 element->obj_field_put(declaringClass_offset, value);
3191 }
3193 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3194 element->obj_field_put(methodName_offset, value);
3195 }
3197 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3198 element->int_field_put(lineNumber_offset, value);
3199 }
3202 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3204 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3205 o->obj_field_put(classes_offset, val);
3206 }
3208 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3209 o->obj_field_put(classEnabled_offset, val);
3210 }
3212 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3213 o->obj_field_put(packages_offset, val);
3214 }
3216 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3217 o->obj_field_put(packageEnabled_offset, val);
3218 }
3220 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3221 o->bool_field_put(deflt_offset, val);
3222 }
3225 // Support for intrinsification of java.nio.Buffer.checkIndex
3226 int java_nio_Buffer::limit_offset() {
3227 return _limit_offset;
3228 }
3231 void java_nio_Buffer::compute_offsets() {
3232 Klass* k = SystemDictionary::nio_Buffer_klass();
3233 assert(k != NULL, "must be loaded in 1.4+");
3234 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3235 }
3237 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3238 if (_owner_offset != 0) return;
3240 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
3241 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3242 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3243 compute_offset(_owner_offset, k,
3244 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3245 }
3247 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3248 assert(_owner_offset != 0, "Must be initialized");
3249 return obj->obj_field(_owner_offset);
3250 }
3252 // Compute hard-coded offsets
3253 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3254 // are not available to determine the offset_of_static_fields.
3255 void JavaClasses::compute_hard_coded_offsets() {
3256 const int x = heapOopSize;
3257 const int header = instanceOopDesc::base_offset_in_bytes();
3259 // Throwable Class
3260 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
3261 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3262 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
3263 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3264 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x;
3266 // java_lang_boxing_object
3267 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3268 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3270 // java_lang_ref_Reference:
3271 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3272 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3273 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
3274 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
3275 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
3276 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3277 // Artificial fields for java_lang_ref_Reference
3278 // The first field is for the discovered field added in 1.4
3279 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3281 // java_lang_ref_SoftReference Class
3282 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3283 // Don't multiply static fields because they are always in wordSize units
3284 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3286 // java_lang_ClassLoader
3287 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3289 // java_lang_System
3290 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
3291 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3292 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3293 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3295 // java_lang_StackTraceElement
3296 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
3297 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3298 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
3299 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3300 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3301 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3302 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3303 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3304 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3306 }
3309 // Compute non-hard-coded field offsets of all the classes in this file
3310 void JavaClasses::compute_offsets() {
3311 // java_lang_Class::compute_offsets was called earlier in bootstrap
3312 java_lang_ClassLoader::compute_offsets();
3313 java_lang_Thread::compute_offsets();
3314 java_lang_ThreadGroup::compute_offsets();
3315 if (EnableInvokeDynamic) {
3316 java_lang_invoke_MethodHandle::compute_offsets();
3317 java_lang_invoke_DirectMethodHandle::compute_offsets();
3318 java_lang_invoke_MemberName::compute_offsets();
3319 java_lang_invoke_LambdaForm::compute_offsets();
3320 java_lang_invoke_MethodType::compute_offsets();
3321 java_lang_invoke_CallSite::compute_offsets();
3322 }
3323 java_security_AccessControlContext::compute_offsets();
3324 // Initialize reflection classes. The layouts of these classes
3325 // changed with the new reflection implementation in JDK 1.4, and
3326 // since the Universe doesn't know what JDK version it is until this
3327 // point we defer computation of these offsets until now.
3328 java_lang_reflect_AccessibleObject::compute_offsets();
3329 java_lang_reflect_Method::compute_offsets();
3330 java_lang_reflect_Constructor::compute_offsets();
3331 java_lang_reflect_Field::compute_offsets();
3332 if (JDK_Version::is_gte_jdk14x_version()) {
3333 java_nio_Buffer::compute_offsets();
3334 }
3335 if (JDK_Version::is_gte_jdk15x_version()) {
3336 sun_reflect_ConstantPool::compute_offsets();
3337 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3338 }
3339 if (JDK_Version::is_jdk18x_version())
3340 java_lang_reflect_Parameter::compute_offsets();
3342 // generated interpreter code wants to know about the offsets we just computed:
3343 AbstractAssembler::update_delayed_values();
3344 }
3346 #ifndef PRODUCT
3348 // These functions exist to assert the validity of hard-coded field offsets to guard
3349 // against changes in the class files
3351 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3352 EXCEPTION_MARK;
3353 fieldDescriptor fd;
3354 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3355 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3356 instanceKlassHandle h_klass (THREAD, k);
3357 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3358 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3359 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3360 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3361 return false;
3362 }
3363 if (fd.is_static()) {
3364 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3365 return false;
3366 }
3367 if (fd.offset() == hardcoded_offset ) {
3368 return true;
3369 } else {
3370 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3371 klass_name, field_name, hardcoded_offset, fd.offset());
3372 return false;
3373 }
3374 }
3377 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3378 EXCEPTION_MARK;
3379 fieldDescriptor fd;
3380 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3381 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3382 instanceKlassHandle h_klass (THREAD, k);
3383 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3384 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3385 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3386 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3387 return false;
3388 }
3389 if (!fd.is_static()) {
3390 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3391 return false;
3392 }
3393 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3394 return true;
3395 } else {
3396 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());
3397 return false;
3398 }
3399 }
3402 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3403 EXCEPTION_MARK;
3404 fieldDescriptor fd;
3405 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3406 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3407 instanceKlassHandle h_klass (THREAD, k);
3408 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3409 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3410 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3411 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3412 return false;
3413 }
3414 if (!fd.is_static() || !fd.has_initial_value()) {
3415 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3416 return false;
3417 }
3418 if (!fd.initial_value_tag().is_int()) {
3419 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3420 return false;
3421 }
3422 jint field_value = fd.int_initial_value();
3423 if (field_value == hardcoded_constant) {
3424 return true;
3425 } else {
3426 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);
3427 return false;
3428 }
3429 }
3432 // Check the hard-coded field offsets of all the classes in this file
3434 void JavaClasses::check_offsets() {
3435 bool valid = true;
3436 HandleMark hm;
3438 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3439 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3441 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3442 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3444 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3445 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3447 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3448 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3450 // java.lang.String
3452 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3453 if (java_lang_String::has_offset_field()) {
3454 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3455 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3456 }
3457 if (java_lang_String::has_hash_field()) {
3458 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3459 }
3461 // java.lang.Class
3463 // Fake fields
3464 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3465 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3467 // java.lang.Throwable
3469 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3470 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3471 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3472 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3474 // Boxed primitive objects (java_lang_boxing_object)
3476 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3477 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3478 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3479 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3480 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3481 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3482 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3483 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3485 // java.lang.ClassLoader
3487 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3489 // java.lang.System
3491 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3492 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3493 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3494 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
3496 // java.lang.StackTraceElement
3498 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3499 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3500 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3501 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3503 // java.lang.ref.Reference
3505 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3506 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3507 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3508 // Fake field
3509 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3510 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3511 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3513 // java.lang.ref.SoftReference
3515 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3516 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3518 // java.lang.AssertionStatusDirectives
3519 //
3520 // The CheckAssertionStatusDirectives boolean can be removed from here and
3521 // globals.hpp after the AssertionStatusDirectives class has been integrated
3522 // into merlin "for some time." Without it, the vm will fail with early
3523 // merlin builds.
3525 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) {
3526 const char* nm = "java/lang/AssertionStatusDirectives";
3527 const char* sig = "[Ljava/lang/String;";
3528 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3529 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3530 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3531 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3532 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3533 }
3535 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3536 }
3538 #endif // PRODUCT
3540 int InjectedField::compute_offset() {
3541 Klass* klass_oop = klass();
3542 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3543 if (!may_be_java && !fs.access_flags().is_internal()) {
3544 // Only look at injected fields
3545 continue;
3546 }
3547 if (fs.name() == name() && fs.signature() == signature()) {
3548 return fs.offset();
3549 }
3550 }
3551 ResourceMark rm;
3552 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)" : "");
3553 #ifndef PRODUCT
3554 klass_oop->print();
3555 tty->print_cr("all fields:");
3556 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3557 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
3558 }
3559 #endif //PRODUCT
3560 fatal("Invalid layout of preloaded class");
3561 return -1;
3562 }
3564 void javaClasses_init() {
3565 JavaClasses::compute_offsets();
3566 JavaClasses::check_offsets();
3567 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3568 }