1 /*
2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/altHashing.hpp"
27 #include "classfile/javaClasses.inline.hpp"
28 #include "classfile/stringTable.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "code/debugInfo.hpp"
31 #include "code/pcDesc.hpp"
32 #include "interpreter/interpreter.hpp"
33 #include "memory/oopFactory.hpp"
34 #include "memory/resourceArea.hpp"
35 #include "memory/universe.inline.hpp"
36 #include "oops/fieldStreams.hpp"
37 #include "oops/instanceKlass.hpp"
38 #include "oops/instanceMirrorKlass.hpp"
39 #include "oops/klass.hpp"
40 #include "oops/method.hpp"
41 #include "oops/objArrayOop.inline.hpp"
42 #include "oops/oop.inline.hpp"
43 #include "oops/symbol.hpp"
44 #include "oops/typeArrayOop.hpp"
45 #include "prims/jvmtiRedefineClassesTrace.hpp"
46 #include "runtime/fieldDescriptor.hpp"
47 #include "runtime/handles.inline.hpp"
48 #include "runtime/interfaceSupport.hpp"
49 #include "runtime/java.hpp"
50 #include "runtime/javaCalls.hpp"
51 #include "runtime/safepoint.hpp"
52 #include "runtime/thread.inline.hpp"
53 #include "runtime/vframe.hpp"
54 #include "utilities/preserveException.hpp"
55
56 #if INCLUDE_JVMCI
57 #include "jvmci/jvmciJavaClasses.hpp"
58 #endif
59
60 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
61
62 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
63 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
64
65 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
66 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
67
68 InjectedField JavaClasses::_injected_fields[] = {
69 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
70 };
71
72 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
73 return _injected_fields[id].compute_offset();
74 }
75
76
77 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
78 *field_count = 0;
79
80 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
81 if (sid == vmSymbols::NO_SID) {
82 // Only well known classes can inject fields
83 return NULL;
84 }
85
86 int count = 0;
87 int start = -1;
88
89 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
90 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
91 count++; \
92 if (start == -1) start = klass##_##name##_enum; \
93 }
94 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
95 #undef LOOKUP_INJECTED_FIELD
96
97 if (start != -1) {
98 *field_count = count;
99 return _injected_fields + start;
100 }
101 return NULL;
102 }
103
104
105 static bool find_field(InstanceKlass* ik,
106 Symbol* name_symbol, Symbol* signature_symbol,
107 fieldDescriptor* fd,
108 bool is_static = false, bool allow_super = false) {
109 if (allow_super || is_static) {
110 return ik->find_field(name_symbol, signature_symbol, is_static, fd) != NULL;
111 } else {
112 return ik->find_local_field(name_symbol, signature_symbol, fd);
113 }
114 }
115
116 // Helpful routine for computing field offsets at run time rather than hardcoding them
117 static void
118 compute_offset(int &dest_offset,
119 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
120 bool is_static = false, bool allow_super = false) {
121 fieldDescriptor fd;
122 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
123 if (!find_field(ik, name_symbol, signature_symbol, &fd, is_static, allow_super)) {
124 ResourceMark rm;
125 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
126 #ifndef PRODUCT
127 klass_oop->print();
128 tty->print_cr("all fields:");
129 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
130 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
131 }
132 #endif //PRODUCT
133 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class");
134 }
135 dest_offset = fd.offset();
136 }
137
138 // Same as above but for "optional" offsets that might not be present in certain JDK versions
139 static void
140 compute_optional_offset(int& dest_offset,
141 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
142 bool allow_super = false) {
143 fieldDescriptor fd;
144 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
145 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
146 dest_offset = fd.offset();
147 }
148 }
149
150
151 int java_lang_String::value_offset = 0;
152 int java_lang_String::offset_offset = 0;
153 int java_lang_String::count_offset = 0;
154 int java_lang_String::hash_offset = 0;
155
156 bool java_lang_String::initialized = false;
157
158 bool java_lang_String::is_instance(oop obj) {
159 return is_instance_inlined(obj);
160 }
161
162 void java_lang_String::compute_offsets() {
163 assert(!initialized, "offsets should be initialized only once");
164
165 Klass* k = SystemDictionary::String_klass();
166 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature());
167 compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature());
168 compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature());
169 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature());
170
171 initialized = true;
172 }
173
174 Handle java_lang_String::basic_create(int length, TRAPS) {
175 assert(initialized, "Must be initialized");
176 // Create the String object first, so there's a chance that the String
177 // and the char array it points to end up in the same cache line.
178 oop obj;
179 obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH);
180
181 // Create the char array. The String object must be handlized here
182 // because GC can happen as a result of the allocation attempt.
183 Handle h_obj(THREAD, obj);
184 typeArrayOop buffer;
185 buffer = oopFactory::new_charArray(length, CHECK_NH);
186
187 // Point the String at the char array
188 obj = h_obj();
189 set_value(obj, buffer);
190 // No need to zero the offset, allocation zero'ed the entire String object
191 assert(offset(obj) == 0, "initial String offset should be zero");
192 //set_offset(obj, 0);
193 set_count(obj, length);
194
195 return h_obj;
196 }
197
198 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
199 Handle h_obj = basic_create(length, CHECK_NH);
200 typeArrayOop buffer = value(h_obj());
201 for (int index = 0; index < length; index++) {
202 buffer->char_at_put(index, unicode[index]);
203 }
204 return h_obj;
205 }
206
207 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
208 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
209 return h_obj();
210 }
211
212 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
213 if (utf8_str == NULL) {
214 return Handle();
215 }
216 int length = UTF8::unicode_length(utf8_str);
217 Handle h_obj = basic_create(length, CHECK_NH);
218 if (length > 0) {
219 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
220 }
221 return h_obj;
222 }
223
224 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
225 Handle h_obj = create_from_str(utf8_str, CHECK_0);
226 return h_obj();
227 }
228
229 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
230 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
231 Handle h_obj = basic_create(length, CHECK_NH);
232 if (length > 0) {
233 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
234 }
235 return h_obj;
236 }
237
238 // Converts a C string to a Java String based on current encoding
239 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
240 assert(str != NULL, "bad arguments");
241
242 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
243 static to_java_string_fn_t _to_java_string_fn = NULL;
244
245 if (_to_java_string_fn == NULL) {
246 void *lib_handle = os::native_java_library();
247 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
248 if (_to_java_string_fn == NULL) {
249 fatal("NewStringPlatform missing");
250 }
251 }
252
253 jstring js = NULL;
254 { JavaThread* thread = (JavaThread*)THREAD;
255 assert(thread->is_Java_thread(), "must be java thread");
256 HandleMark hm(thread);
257 ThreadToNativeFromVM ttn(thread);
258 js = (_to_java_string_fn)(thread->jni_environment(), str);
259 }
260 return Handle(THREAD, JNIHandles::resolve(js));
261 }
262
263 // Converts a Java String to a native C string that can be used for
264 // native OS calls.
265 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
266
267 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
268 static to_platform_string_fn_t _to_platform_string_fn = NULL;
269
270 if (_to_platform_string_fn == NULL) {
271 void *lib_handle = os::native_java_library();
272 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
273 if (_to_platform_string_fn == NULL) {
274 fatal("GetStringPlatformChars missing");
275 }
276 }
277
278 char *native_platform_string;
279 { JavaThread* thread = (JavaThread*)THREAD;
280 assert(thread->is_Java_thread(), "must be java thread");
281 JNIEnv *env = thread->jni_environment();
282 jstring js = (jstring) JNIHandles::make_local(env, java_string());
283 bool is_copy;
284 HandleMark hm(thread);
285 ThreadToNativeFromVM ttn(thread);
286 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
287 assert(is_copy == JNI_TRUE, "is_copy value changed");
288 JNIHandles::destroy_local(js);
289 }
290 return native_platform_string;
291 }
292
293 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
294 oop obj = java_string();
295 // Typical usage is to convert all '/' to '.' in string.
296 typeArrayOop value = java_lang_String::value(obj);
297 int offset = java_lang_String::offset(obj);
298 int length = java_lang_String::length(obj);
299
300 // First check if any from_char exist
301 int index; // Declared outside, used later
302 for (index = 0; index < length; index++) {
303 if (value->char_at(index + offset) == from_char) {
304 break;
305 }
306 }
307 if (index == length) {
308 // No from_char, so do not copy.
309 return java_string;
310 }
311
312 // Create new UNICODE buffer. Must handlize value because GC
313 // may happen during String and char array creation.
314 typeArrayHandle h_value(THREAD, value);
315 Handle string = basic_create(length, CHECK_NH);
316
317 typeArrayOop from_buffer = h_value();
318 typeArrayOop to_buffer = java_lang_String::value(string());
319
320 // Copy contents
321 for (index = 0; index < length; index++) {
322 jchar c = from_buffer->char_at(index + offset);
323 if (c == from_char) {
324 c = to_char;
325 }
326 to_buffer->char_at_put(index, c);
327 }
328 return string;
329 }
330
331 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
332 typeArrayOop value = java_lang_String::value(java_string);
333 int offset = java_lang_String::offset(java_string);
334 length = java_lang_String::length(java_string);
335
336 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
337 if (result != NULL) {
338 for (int index = 0; index < length; index++) {
339 result[index] = value->char_at(index + offset);
340 }
341 } else {
342 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
343 }
344 return result;
345 }
346
347 unsigned int java_lang_String::hash_code(oop java_string) {
348 int length = java_lang_String::length(java_string);
349 // Zero length string will hash to zero with String.hashCode() function.
350 if (length == 0) return 0;
351
352 typeArrayOop value = java_lang_String::value(java_string);
353 int offset = java_lang_String::offset(java_string);
354 return java_lang_String::hash_code(value->char_at_addr(offset), length);
355 }
356
357 char* java_lang_String::as_quoted_ascii(oop java_string) {
358 typeArrayOop value = java_lang_String::value(java_string);
359 int offset = java_lang_String::offset(java_string);
360 int length = java_lang_String::length(java_string);
361
362 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
363 if (base == NULL) return NULL;
364
365 int result_length = UNICODE::quoted_ascii_length(base, length) + 1;
366 char* result = NEW_RESOURCE_ARRAY(char, result_length);
367 UNICODE::as_quoted_ascii(base, length, result, result_length);
368 assert(result_length >= length + 1, "must not be shorter");
369 assert(result_length == (int)strlen(result) + 1, "must match");
370 return result;
371 }
372
373 unsigned int java_lang_String::hash_string(oop java_string) {
374 int length = java_lang_String::length(java_string);
375 // Zero length string doesn't hash necessarily hash to zero.
376 if (length == 0) {
377 return StringTable::hash_string(NULL, 0);
378 }
379
380 typeArrayOop value = java_lang_String::value(java_string);
381 int offset = java_lang_String::offset(java_string);
382 return StringTable::hash_string(value->char_at_addr(offset), length);
383 }
384
385 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {
386 oop obj = java_string();
387 typeArrayOop value = java_lang_String::value(obj);
388 int offset = java_lang_String::offset(obj);
389 int length = java_lang_String::length(obj);
390 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
391 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
392 return sym;
393 }
394
395 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
396 typeArrayOop value = java_lang_String::value(java_string);
397 int offset = java_lang_String::offset(java_string);
398 int length = java_lang_String::length(java_string);
399 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
400 return SymbolTable::probe_unicode(base, length);
401 }
402
403
404 int java_lang_String::utf8_length(oop java_string) {
405 typeArrayOop value = java_lang_String::value(java_string);
406 int offset = java_lang_String::offset(java_string);
407 int length = java_lang_String::length(java_string);
408 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
409 return UNICODE::utf8_length(position, length);
410 }
411
412 char* java_lang_String::as_utf8_string(oop java_string) {
413 typeArrayOop value = java_lang_String::value(java_string);
414 int offset = java_lang_String::offset(java_string);
415 int length = java_lang_String::length(java_string);
416 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
417 return UNICODE::as_utf8(position, length);
418 }
419
420 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
421 typeArrayOop value = java_lang_String::value(java_string);
422 int offset = java_lang_String::offset(java_string);
423 int length = java_lang_String::length(java_string);
424 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
425 return UNICODE::as_utf8(position, length, buf, buflen);
426 }
427
428 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
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 assert(start + len <= length, "just checking");
433 jchar* position = value->char_at_addr(offset + start);
434 return UNICODE::as_utf8(position, len);
435 }
436
437 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) {
438 typeArrayOop value = java_lang_String::value(java_string);
439 int offset = java_lang_String::offset(java_string);
440 int length = java_lang_String::length(java_string);
441 assert(start + len <= length, "just checking");
442 jchar* position = value->char_at_addr(offset + start);
443 return UNICODE::as_utf8(position, len, buf, buflen);
444 }
445
446 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
447 assert(java_string->klass() == SystemDictionary::String_klass(),
448 "must be java_string");
449 typeArrayOop value = java_lang_String::value(java_string);
450 int offset = java_lang_String::offset(java_string);
451 int length = java_lang_String::length(java_string);
452 if (length != len) {
453 return false;
454 }
455 for (int i = 0; i < len; i++) {
456 if (value->char_at(i + offset) != chars[i]) {
457 return false;
458 }
459 }
460 return true;
461 }
462
463 bool java_lang_String::equals(oop str1, oop str2) {
464 assert(str1->klass() == SystemDictionary::String_klass(),
465 "must be java String");
466 assert(str2->klass() == SystemDictionary::String_klass(),
467 "must be java String");
468 typeArrayOop value1 = java_lang_String::value(str1);
469 int offset1 = java_lang_String::offset(str1);
470 int length1 = java_lang_String::length(str1);
471 typeArrayOop value2 = java_lang_String::value(str2);
472 int offset2 = java_lang_String::offset(str2);
473 int length2 = java_lang_String::length(str2);
474
475 if (length1 != length2) {
476 return false;
477 }
478 for (int i = 0; i < length1; i++) {
479 if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) {
480 return false;
481 }
482 }
483 return true;
484 }
485
486 void java_lang_String::print(oop java_string, outputStream* st) {
487 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
488 typeArrayOop value = java_lang_String::value(java_string);
489
490 if (value == NULL) {
491 // This can happen if, e.g., printing a String
492 // object before its initializer has been called
493 st->print("NULL");
494 return;
495 }
496
497 int offset = java_lang_String::offset(java_string);
498 int length = java_lang_String::length(java_string);
499
500 st->print("\"");
501 for (int index = 0; index < length; index++) {
502 st->print("%c", value->char_at(index + offset));
503 }
504 st->print("\"");
505 }
506
507
508 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
509 assert(mirror.not_null() && fd->is_static(), "just checking");
510 if (fd->has_initial_value()) {
511 BasicType t = fd->field_type();
512 switch (t) {
513 case T_BYTE:
514 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
515 break;
516 case T_BOOLEAN:
517 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
518 break;
519 case T_CHAR:
520 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
521 break;
522 case T_SHORT:
523 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
524 break;
525 case T_INT:
526 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
527 break;
528 case T_FLOAT:
529 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
530 break;
531 case T_DOUBLE:
532 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
533 break;
534 case T_LONG:
535 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
536 break;
537 case T_OBJECT:
538 {
539 #ifdef ASSERT
540 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
541 assert(fd->signature() == sym, "just checking");
542 #endif
543 oop string = fd->string_initial_value(CHECK);
544 mirror()->obj_field_put(fd->offset(), string);
545 }
546 break;
547 default:
548 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
549 "Illegal ConstantValue attribute in class file");
550 }
551 }
552 }
553
554
555 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) {
556 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
557
558 // If the offset was read from the shared archive, it was fixed up already
559 if (!k->is_shared()) {
560 if (k->oop_is_instance()) {
561 // During bootstrap, java.lang.Class wasn't loaded so static field
562 // offsets were computed without the size added it. Go back and
563 // update all the static field offsets to included the size.
564 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) {
565 if (fs.access_flags().is_static()) {
566 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
567 fs.set_offset(real_offset);
568 }
569 }
570 }
571 }
572 create_mirror(k, Handle(NULL), Handle(NULL), CHECK);
573 }
574
575 void java_lang_Class::initialize_mirror_fields(KlassHandle k,
576 Handle mirror,
577 Handle protection_domain,
578 TRAPS) {
579 // Allocate a simple java object for a lock.
580 // This needs to be a java object because during class initialization
581 // it can be held across a java call.
582 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
583 set_init_lock(mirror(), r);
584
585 // Set protection domain also
586 set_protection_domain(mirror(), protection_domain());
587
588 // Initialize static fields
589 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK);
590 }
591
592 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader,
593 Handle protection_domain, TRAPS) {
594 assert(k->java_mirror() == NULL, "should only assign mirror once");
595 // Use this moment of initialization to cache modifier_flags also,
596 // to support Class.getModifiers(). Instance classes recalculate
597 // the cached flags after the class file is parsed, but before the
598 // class is put into the system dictionary.
599 int computed_modifiers = k->compute_modifier_flags(CHECK);
600 k->set_modifier_flags(computed_modifiers);
601 // Class_klass has to be loaded because it is used to allocate
602 // the mirror.
603 if (SystemDictionary::Class_klass_loaded()) {
604 // Allocate mirror (java.lang.Class instance)
605 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
606
607 // Setup indirection from mirror->klass
608 if (!k.is_null()) {
609 java_lang_Class::set_klass(mirror(), k());
610 }
611
612 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
613 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
614
615 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
616
617 // It might also have a component mirror. This mirror must already exist.
618 if (k->oop_is_array()) {
619 Handle comp_mirror;
620 if (k->oop_is_typeArray()) {
621 BasicType type = TypeArrayKlass::cast(k())->element_type();
622 comp_mirror = Universe::java_mirror(type);
623 } else {
624 assert(k->oop_is_objArray(), "Must be");
625 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass();
626 assert(element_klass != NULL, "Must have an element klass");
627 comp_mirror = element_klass->java_mirror();
628 }
629 assert(comp_mirror.not_null(), "must have a mirror");
630
631 // Two-way link between the array klass and its component mirror:
632 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
633 set_component_mirror(mirror(), comp_mirror());
634 set_array_klass(comp_mirror(), k());
635 } else {
636 assert(k->oop_is_instance(), "Must be");
637
638 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
639 if (HAS_PENDING_EXCEPTION) {
640 // If any of the fields throws an exception like OOM remove the klass field
641 // from the mirror so GC doesn't follow it after the klass has been deallocated.
642 // This mirror looks like a primitive type, which logically it is because it
643 // it represents no class.
644 java_lang_Class::set_klass(mirror(), NULL);
645 return;
646 }
647 }
648
649 // set the classLoader field in the java_lang_Class instance
650 assert(class_loader() == k->class_loader(), "should be same");
651 set_class_loader(mirror(), class_loader());
652
653 // Setup indirection from klass->mirror last
654 // after any exceptions can happen during allocations.
655 if (!k.is_null()) {
656 k->set_java_mirror(mirror());
657 }
658 } else {
659 if (fixup_mirror_list() == NULL) {
660 GrowableArray<Klass*>* list =
661 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
662 set_fixup_mirror_list(list);
663 }
664 fixup_mirror_list()->push(k());
665 }
666 }
667
668
669 int java_lang_Class::oop_size(oop java_class) {
670 assert(_oop_size_offset != 0, "must be set");
671 return java_class->int_field(_oop_size_offset);
672 }
673 void java_lang_Class::set_oop_size(oop java_class, int size) {
674 assert(_oop_size_offset != 0, "must be set");
675 java_class->int_field_put(_oop_size_offset, size);
676 }
677 int java_lang_Class::static_oop_field_count(oop java_class) {
678 assert(_static_oop_field_count_offset != 0, "must be set");
679 return java_class->int_field(_static_oop_field_count_offset);
680 }
681 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
682 assert(_static_oop_field_count_offset != 0, "must be set");
683 java_class->int_field_put(_static_oop_field_count_offset, size);
684 }
685
686 oop java_lang_Class::protection_domain(oop java_class) {
687 assert(_protection_domain_offset != 0, "must be set");
688 return java_class->obj_field(_protection_domain_offset);
689 }
690 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
691 assert(_protection_domain_offset != 0, "must be set");
692 java_class->obj_field_put(_protection_domain_offset, pd);
693 }
694
695 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
696 assert(_component_mirror_offset != 0, "must be set");
697 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
698 }
699 oop java_lang_Class::component_mirror(oop java_class) {
700 assert(_component_mirror_offset != 0, "must be set");
701 return java_class->obj_field(_component_mirror_offset);
702 }
703
704 oop java_lang_Class::init_lock(oop java_class) {
705 assert(_init_lock_offset != 0, "must be set");
706 return java_class->obj_field(_init_lock_offset);
707 }
708 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
709 assert(_init_lock_offset != 0, "must be set");
710 java_class->obj_field_put(_init_lock_offset, init_lock);
711 }
712
713 objArrayOop java_lang_Class::signers(oop java_class) {
714 assert(_signers_offset != 0, "must be set");
715 return (objArrayOop)java_class->obj_field(_signers_offset);
716 }
717 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
718 assert(_signers_offset != 0, "must be set");
719 java_class->obj_field_put(_signers_offset, (oop)signers);
720 }
721
722
723 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
724 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
725 if (_class_loader_offset != 0) {
726 java_class->obj_field_put(_class_loader_offset, loader);
727 }
728 }
729
730 oop java_lang_Class::class_loader(oop java_class) {
731 assert(_class_loader_offset != 0, "must be set");
732 return java_class->obj_field(_class_loader_offset);
733 }
734
735 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
736 // This should be improved by adding a field at the Java level or by
737 // introducing a new VM klass (see comment in ClassFileParser)
738 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
739 if (type != T_VOID) {
740 Klass* aklass = Universe::typeArrayKlassObj(type);
741 assert(aklass != NULL, "correct bootstrap");
742 set_array_klass(java_class, aklass);
743 }
744 #ifdef ASSERT
745 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
746 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
747 #endif
748 return java_class;
749 }
750
751
752 Klass* java_lang_Class::as_Klass(oop java_class) {
753 //%note memory_2
754 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
755 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
756 assert(k == NULL || k->is_klass(), "type check");
757 return k;
758 }
759
760
761 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
762 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
763 java_class->metadata_field_put(_klass_offset, klass);
764 }
765
766
767 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
768 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
769 Symbol* name = NULL;
770 bool is_instance = false;
771 if (is_primitive(java_class)) {
772 name = vmSymbols::type_signature(primitive_type(java_class));
773 } else {
774 Klass* k = as_Klass(java_class);
775 is_instance = k->oop_is_instance();
776 name = k->name();
777 }
778 if (name == NULL) {
779 st->print("<null>");
780 return;
781 }
782 if (is_instance) st->print("L");
783 st->write((char*) name->base(), (int) name->utf8_length());
784 if (is_instance) st->print(";");
785 }
786
787 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
788 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
789 Symbol* name;
790 if (is_primitive(java_class)) {
791 name = vmSymbols::type_signature(primitive_type(java_class));
792 // Because this can create a new symbol, the caller has to decrement
793 // the refcount, so make adjustment here and below for symbols returned
794 // that are not created or incremented due to a successful lookup.
795 name->increment_refcount();
796 } else {
797 Klass* k = as_Klass(java_class);
798 if (!k->oop_is_instance()) {
799 name = k->name();
800 name->increment_refcount();
801 } else {
802 ResourceMark rm;
803 const char* sigstr = k->signature_name();
804 int siglen = (int) strlen(sigstr);
805 if (!intern_if_not_found) {
806 name = SymbolTable::probe(sigstr, siglen);
807 } else {
808 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
809 }
810 }
811 }
812 return name;
813 }
814
815 // Returns the Java name for this Java mirror (Resource allocated)
816 // See Klass::external_name().
817 // For primitive type Java mirrors, its type name is returned.
818 const char* java_lang_Class::as_external_name(oop java_class) {
819 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
820 const char* name = NULL;
821 if (is_primitive(java_class)) {
822 name = type2name(primitive_type(java_class));
823 } else {
824 name = as_Klass(java_class)->external_name();
825 }
826 if (name == NULL) {
827 name = "<null>";
828 }
829 return name;
830 }
831
832 Klass* java_lang_Class::array_klass(oop java_class) {
833 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
834 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass");
835 return k;
836 }
837
838
839 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
840 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass");
841 java_class->metadata_field_put(_array_klass_offset, klass);
842 }
843
844
845 bool java_lang_Class::is_primitive(oop java_class) {
846 // should assert:
847 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
848 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
849
850 #ifdef ASSERT
851 if (is_primitive) {
852 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
853 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
854 "Should be either the T_VOID primitive or a java primitive");
855 }
856 #endif
857
858 return is_primitive;
859 }
860
861
862 BasicType java_lang_Class::primitive_type(oop java_class) {
863 assert(java_lang_Class::is_primitive(java_class), "just checking");
864 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
865 BasicType type = T_VOID;
866 if (ak != NULL) {
867 // Note: create_basic_type_mirror above initializes ak to a non-null value.
868 type = ArrayKlass::cast(ak)->element_type();
869 } else {
870 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
871 }
872 assert(Universe::java_mirror(type) == java_class, "must be consistent");
873 return type;
874 }
875
876 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
877 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
878 if (is_primitive(java_class)) {
879 if (reference_klass != NULL)
880 (*reference_klass) = NULL;
881 return primitive_type(java_class);
882 } else {
883 if (reference_klass != NULL)
884 (*reference_klass) = as_Klass(java_class);
885 return T_OBJECT;
886 }
887 }
888
889
890 oop java_lang_Class::primitive_mirror(BasicType t) {
891 oop mirror = Universe::java_mirror(t);
892 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
893 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
894 return mirror;
895 }
896
897 bool java_lang_Class::offsets_computed = false;
898 int java_lang_Class::classRedefinedCount_offset = -1;
899
900 void java_lang_Class::compute_offsets() {
901 assert(!offsets_computed, "offsets should be initialized only once");
902 offsets_computed = true;
903
904 Klass* k = SystemDictionary::Class_klass();
905 // The classRedefinedCount field is only present starting in 1.5,
906 // so don't go fatal.
907 compute_optional_offset(classRedefinedCount_offset,
908 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
909
910 // Needs to be optional because the old build runs Queens during bootstrapping
911 // and jdk8-9 doesn't have coordinated pushes yet.
912 compute_optional_offset(_class_loader_offset,
913 k, vmSymbols::classLoader_name(),
914 vmSymbols::classloader_signature());
915
916 compute_offset(_component_mirror_offset,
917 k, vmSymbols::componentType_name(),
918 vmSymbols::class_signature());
919
920 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
921 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
922 // GC treats them the same.
923 _init_lock_offset = _component_mirror_offset;
924
925 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
926 }
927
928 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
929 if (classRedefinedCount_offset == -1) {
930 // If we don't have an offset for it then just return -1 as a marker.
931 return -1;
932 }
933
934 return the_class_mirror->int_field(classRedefinedCount_offset);
935 }
936
937 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
938 if (classRedefinedCount_offset == -1) {
939 // If we don't have an offset for it then nothing to set.
940 return;
941 }
942
943 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
944 }
945
946
947 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
948 // platform thread structure, and a eetop offset which was used for thread
949 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
950 // merged, so in the HotSpot VM we just use the eetop field for the thread
951 // instead of the privateInfo_offset.
952 //
953 // Note: The stackSize field is only present starting in 1.4.
954
955 int java_lang_Thread::_name_offset = 0;
956 int java_lang_Thread::_group_offset = 0;
957 int java_lang_Thread::_contextClassLoader_offset = 0;
958 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
959 int java_lang_Thread::_priority_offset = 0;
960 int java_lang_Thread::_eetop_offset = 0;
961 int java_lang_Thread::_daemon_offset = 0;
962 int java_lang_Thread::_stillborn_offset = 0;
963 int java_lang_Thread::_stackSize_offset = 0;
964 int java_lang_Thread::_tid_offset = 0;
965 int java_lang_Thread::_thread_status_offset = 0;
966 int java_lang_Thread::_park_blocker_offset = 0;
967 int java_lang_Thread::_park_event_offset = 0 ;
968
969
970 void java_lang_Thread::compute_offsets() {
971 assert(_group_offset == 0, "offsets should be initialized only once");
972
973 Klass* k = SystemDictionary::Thread_klass();
974 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
975 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
976 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
977 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
978 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
979 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
980 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
981 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
982 // The stackSize field is only present starting in 1.4, so don't go fatal.
983 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
984 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
985 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
986 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
987 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
988 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
989 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
990 vmSymbols::long_signature());
991 }
992
993
994 JavaThread* java_lang_Thread::thread(oop java_thread) {
995 return (JavaThread*)java_thread->address_field(_eetop_offset);
996 }
997
998
999 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1000 java_thread->address_field_put(_eetop_offset, (address)thread);
1001 }
1002
1003
1004 oop java_lang_Thread::name(oop java_thread) {
1005 return java_thread->obj_field(_name_offset);
1006 }
1007
1008
1009 void java_lang_Thread::set_name(oop java_thread, oop name) {
1010 java_thread->obj_field_put(_name_offset, name);
1011 }
1012
1013
1014 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1015 return (ThreadPriority)java_thread->int_field(_priority_offset);
1016 }
1017
1018
1019 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1020 java_thread->int_field_put(_priority_offset, priority);
1021 }
1022
1023
1024 oop java_lang_Thread::threadGroup(oop java_thread) {
1025 return java_thread->obj_field(_group_offset);
1026 }
1027
1028
1029 bool java_lang_Thread::is_stillborn(oop java_thread) {
1030 return java_thread->bool_field(_stillborn_offset) != 0;
1031 }
1032
1033
1034 // We never have reason to turn the stillborn bit off
1035 void java_lang_Thread::set_stillborn(oop java_thread) {
1036 java_thread->bool_field_put(_stillborn_offset, true);
1037 }
1038
1039
1040 bool java_lang_Thread::is_alive(oop java_thread) {
1041 JavaThread* thr = java_lang_Thread::thread(java_thread);
1042 return (thr != NULL);
1043 }
1044
1045
1046 bool java_lang_Thread::is_daemon(oop java_thread) {
1047 return java_thread->bool_field(_daemon_offset) != 0;
1048 }
1049
1050
1051 void java_lang_Thread::set_daemon(oop java_thread) {
1052 java_thread->bool_field_put(_daemon_offset, true);
1053 }
1054
1055 oop java_lang_Thread::context_class_loader(oop java_thread) {
1056 return java_thread->obj_field(_contextClassLoader_offset);
1057 }
1058
1059 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1060 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1061 }
1062
1063
1064 jlong java_lang_Thread::stackSize(oop java_thread) {
1065 if (_stackSize_offset > 0) {
1066 return java_thread->long_field(_stackSize_offset);
1067 } else {
1068 return 0;
1069 }
1070 }
1071
1072 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1073 void java_lang_Thread::set_thread_status(oop java_thread,
1074 java_lang_Thread::ThreadStatus status) {
1075 // The threadStatus is only present starting in 1.5
1076 if (_thread_status_offset > 0) {
1077 java_thread->int_field_put(_thread_status_offset, status);
1078 }
1079 }
1080
1081 // Read thread status value from threadStatus field in java.lang.Thread java class.
1082 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1083 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() ||
1084 JavaThread::current()->thread_state() == _thread_in_vm,
1085 "Java Thread is not running in vm");
1086 // The threadStatus is only present starting in 1.5
1087 if (_thread_status_offset > 0) {
1088 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1089 } else {
1090 // All we can easily figure out is if it is alive, but that is
1091 // enough info for a valid unknown status.
1092 // These aren't restricted to valid set ThreadStatus values, so
1093 // use JVMTI values and cast.
1094 JavaThread* thr = java_lang_Thread::thread(java_thread);
1095 if (thr == NULL) {
1096 // the thread hasn't run yet or is in the process of exiting
1097 return NEW;
1098 }
1099 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1100 }
1101 }
1102
1103
1104 jlong java_lang_Thread::thread_id(oop java_thread) {
1105 // The thread ID field is only present starting in 1.5
1106 if (_tid_offset > 0) {
1107 return java_thread->long_field(_tid_offset);
1108 } else {
1109 return 0;
1110 }
1111 }
1112
1113 oop java_lang_Thread::park_blocker(oop java_thread) {
1114 assert(JDK_Version::current().supports_thread_park_blocker() &&
1115 _park_blocker_offset != 0, "Must support parkBlocker field");
1116
1117 if (_park_blocker_offset > 0) {
1118 return java_thread->obj_field(_park_blocker_offset);
1119 }
1120
1121 return NULL;
1122 }
1123
1124 jlong java_lang_Thread::park_event(oop java_thread) {
1125 if (_park_event_offset > 0) {
1126 return java_thread->long_field(_park_event_offset);
1127 }
1128 return 0;
1129 }
1130
1131 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1132 if (_park_event_offset > 0) {
1133 java_thread->long_field_put(_park_event_offset, ptr);
1134 return true;
1135 }
1136 return false;
1137 }
1138
1139
1140 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1141 assert(_thread_status_offset != 0, "Must have thread status");
1142 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1143 switch (status) {
1144 case NEW : return "NEW";
1145 case RUNNABLE : return "RUNNABLE";
1146 case SLEEPING : return "TIMED_WAITING (sleeping)";
1147 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1148 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1149 case PARKED : return "WAITING (parking)";
1150 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1151 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1152 case TERMINATED : return "TERMINATED";
1153 default : return "UNKNOWN";
1154 };
1155 }
1156 int java_lang_ThreadGroup::_parent_offset = 0;
1157 int java_lang_ThreadGroup::_name_offset = 0;
1158 int java_lang_ThreadGroup::_threads_offset = 0;
1159 int java_lang_ThreadGroup::_groups_offset = 0;
1160 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1161 int java_lang_ThreadGroup::_destroyed_offset = 0;
1162 int java_lang_ThreadGroup::_daemon_offset = 0;
1163 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
1164 int java_lang_ThreadGroup::_nthreads_offset = 0;
1165 int java_lang_ThreadGroup::_ngroups_offset = 0;
1166
1167 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1168 assert(java_thread_group->is_oop(), "thread group must be oop");
1169 return java_thread_group->obj_field(_parent_offset);
1170 }
1171
1172 // ("name as oop" accessor is not necessary)
1173
1174 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
1175 oop name = java_thread_group->obj_field(_name_offset);
1176 // ThreadGroup.name can be null
1177 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
1178 }
1179
1180 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1181 assert(java_thread_group->is_oop(), "thread group must be oop");
1182 return java_thread_group->int_field(_nthreads_offset);
1183 }
1184
1185 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1186 oop threads = java_thread_group->obj_field(_threads_offset);
1187 assert(threads != NULL, "threadgroups should have threads");
1188 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1189 return objArrayOop(threads);
1190 }
1191
1192 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1193 assert(java_thread_group->is_oop(), "thread group must be oop");
1194 return java_thread_group->int_field(_ngroups_offset);
1195 }
1196
1197 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1198 oop groups = java_thread_group->obj_field(_groups_offset);
1199 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1200 return objArrayOop(groups);
1201 }
1202
1203 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1204 assert(java_thread_group->is_oop(), "thread group must be oop");
1205 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1206 }
1207
1208 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1209 assert(java_thread_group->is_oop(), "thread group must be oop");
1210 return java_thread_group->bool_field(_destroyed_offset) != 0;
1211 }
1212
1213 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1214 assert(java_thread_group->is_oop(), "thread group must be oop");
1215 return java_thread_group->bool_field(_daemon_offset) != 0;
1216 }
1217
1218 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1219 assert(java_thread_group->is_oop(), "thread group must be oop");
1220 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1221 }
1222
1223 void java_lang_ThreadGroup::compute_offsets() {
1224 assert(_parent_offset == 0, "offsets should be initialized only once");
1225
1226 Klass* k = SystemDictionary::ThreadGroup_klass();
1227
1228 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1229 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1230 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1231 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1232 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1233 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1234 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1235 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1236 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1237 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1238 }
1239
1240 oop java_lang_Throwable::unassigned_stacktrace() {
1241 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass());
1242 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1243 if (UseCompressedOops) {
1244 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1245 } else {
1246 return oopDesc::load_decode_heap_oop((oop*)addr);
1247 }
1248 }
1249
1250 oop java_lang_Throwable::backtrace(oop throwable) {
1251 return throwable->obj_field_acquire(backtrace_offset);
1252 }
1253
1254
1255 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1256 throwable->release_obj_field_put(backtrace_offset, value);
1257 }
1258
1259
1260 oop java_lang_Throwable::message(oop throwable) {
1261 return throwable->obj_field(detailMessage_offset);
1262 }
1263
1264
1265 oop java_lang_Throwable::message(Handle throwable) {
1266 return throwable->obj_field(detailMessage_offset);
1267 }
1268
1269
1270 // Return Symbol for detailed_message or NULL
1271 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1272 PRESERVE_EXCEPTION_MARK; // Keep original exception
1273 oop detailed_message = java_lang_Throwable::message(throwable);
1274 if (detailed_message != NULL) {
1275 return java_lang_String::as_symbol(detailed_message, THREAD);
1276 }
1277 return NULL;
1278 }
1279
1280 void java_lang_Throwable::set_message(oop throwable, oop value) {
1281 throwable->obj_field_put(detailMessage_offset, value);
1282 }
1283
1284
1285 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1286 throwable->obj_field_put(stackTrace_offset, st_element_array);
1287 }
1288
1289 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1290 set_stacktrace(throwable, NULL);
1291 }
1292
1293
1294 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1295 ResourceMark rm;
1296 Klass* k = throwable->klass();
1297 assert(k != NULL, "just checking");
1298 st->print("%s", InstanceKlass::cast(k)->external_name());
1299 oop msg = message(throwable);
1300 if (msg != NULL) {
1301 st->print(": %s", java_lang_String::as_utf8_string(msg));
1302 }
1303 }
1304
1305
1306 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1307 ResourceMark rm;
1308 Klass* k = throwable->klass();
1309 assert(k != NULL, "just checking");
1310 st->print("%s", InstanceKlass::cast(k)->external_name());
1311 oop msg = message(throwable);
1312 if (msg != NULL) {
1313 st->print(": %s", java_lang_String::as_utf8_string(msg));
1314 }
1315 }
1316
1317 // After this many redefines, the stack trace is unreliable.
1318 const int MAX_VERSION = USHRT_MAX;
1319
1320 // Helper backtrace functions to store bci|version together.
1321 static inline int merge_bci_and_version(int bci, int version) {
1322 // only store u2 for version, checking for overflow.
1323 if (version > USHRT_MAX || version < 0) version = MAX_VERSION;
1324 assert((jushort)bci == bci, "bci should be short");
1325 return build_int_from_shorts(version, bci);
1326 }
1327
1328 static inline int bci_at(unsigned int merged) {
1329 return extract_high_short_from_int(merged);
1330 }
1331 static inline int version_at(unsigned int merged) {
1332 return extract_low_short_from_int(merged);
1333 }
1334
1335 static inline bool version_matches(Method* method, int version) {
1336 assert(version < MAX_VERSION, "version is too big");
1337 return method != NULL && (method->constants()->version() == version);
1338 }
1339
1340 static inline int get_line_number(Method* method, int bci) {
1341 int line_number = 0;
1342 if (method->is_native()) {
1343 // Negative value different from -1 below, enabling Java code in
1344 // class java.lang.StackTraceElement to distinguish "native" from
1345 // "no LineNumberTable". JDK tests for -2.
1346 line_number = -2;
1347 } else {
1348 // Returns -1 if no LineNumberTable, and otherwise actual line number
1349 line_number = method->line_number_from_bci(bci);
1350 if (line_number == -1 && ShowHiddenFrames) {
1351 line_number = bci + 1000000;
1352 }
1353 }
1354 return line_number;
1355 }
1356
1357 // This class provides a simple wrapper over the internal structure of
1358 // exception backtrace to insulate users of the backtrace from needing
1359 // to know what it looks like.
1360 class BacktraceBuilder: public StackObj {
1361 private:
1362 Handle _backtrace;
1363 objArrayOop _head;
1364 typeArrayOop _methods;
1365 typeArrayOop _bcis;
1366 objArrayOop _mirrors;
1367 typeArrayOop _cprefs; // needed to insulate method name against redefinition
1368 int _index;
1369 No_Safepoint_Verifier _nsv;
1370
1371 public:
1372
1373 enum {
1374 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1375 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1376 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1377 trace_cprefs_offset = java_lang_Throwable::trace_cprefs_offset,
1378 trace_next_offset = java_lang_Throwable::trace_next_offset,
1379 trace_size = java_lang_Throwable::trace_size,
1380 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1381 };
1382
1383 // get info out of chunks
1384 static typeArrayOop get_methods(objArrayHandle chunk) {
1385 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1386 assert(methods != NULL, "method array should be initialized in backtrace");
1387 return methods;
1388 }
1389 static typeArrayOop get_bcis(objArrayHandle chunk) {
1390 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1391 assert(bcis != NULL, "bci array should be initialized in backtrace");
1392 return bcis;
1393 }
1394 static objArrayOop get_mirrors(objArrayHandle chunk) {
1395 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1396 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1397 return mirrors;
1398 }
1399 static typeArrayOop get_cprefs(objArrayHandle chunk) {
1400 typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset));
1401 assert(cprefs != NULL, "cprefs array should be initialized in backtrace");
1402 return cprefs;
1403 }
1404
1405 // constructor for new backtrace
1406 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) {
1407 expand(CHECK);
1408 _backtrace = _head;
1409 _index = 0;
1410 }
1411
1412 BacktraceBuilder(objArrayHandle backtrace) {
1413 _methods = get_methods(backtrace);
1414 _bcis = get_bcis(backtrace);
1415 _mirrors = get_mirrors(backtrace);
1416 _cprefs = get_cprefs(backtrace);
1417 assert(_methods->length() == _bcis->length() &&
1418 _methods->length() == _mirrors->length(),
1419 "method and source information arrays should match");
1420
1421 // head is the preallocated backtrace
1422 _backtrace = _head = backtrace();
1423 _index = 0;
1424 }
1425
1426 void expand(TRAPS) {
1427 objArrayHandle old_head(THREAD, _head);
1428 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1429
1430 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1431 objArrayHandle new_head(THREAD, head);
1432
1433 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1434 typeArrayHandle new_methods(THREAD, methods);
1435
1436 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1437 typeArrayHandle new_bcis(THREAD, bcis);
1438
1439 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1440 objArrayHandle new_mirrors(THREAD, mirrors);
1441
1442 typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1443 typeArrayHandle new_cprefs(THREAD, cprefs);
1444
1445 if (!old_head.is_null()) {
1446 old_head->obj_at_put(trace_next_offset, new_head());
1447 }
1448 new_head->obj_at_put(trace_methods_offset, new_methods());
1449 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1450 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1451 new_head->obj_at_put(trace_cprefs_offset, new_cprefs());
1452
1453 _head = new_head();
1454 _methods = new_methods();
1455 _bcis = new_bcis();
1456 _mirrors = new_mirrors();
1457 _cprefs = new_cprefs();
1458 _index = 0;
1459 }
1460
1461 oop backtrace() {
1462 return _backtrace();
1463 }
1464
1465 inline void push(Method* method, int bci, TRAPS) {
1466 // Smear the -1 bci to 0 since the array only holds unsigned
1467 // shorts. The later line number lookup would just smear the -1
1468 // to a 0 even if it could be recorded.
1469 if (bci == SynchronizationEntryBCI) bci = 0;
1470
1471 if (_index >= trace_chunk_size) {
1472 methodHandle mhandle(THREAD, method);
1473 expand(CHECK);
1474 method = mhandle();
1475 }
1476
1477 _methods->short_at_put(_index, method->orig_method_idnum());
1478 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version()));
1479 _cprefs->short_at_put(_index, method->name_index());
1480
1481 // We need to save the mirrors in the backtrace to keep the class
1482 // from being unloaded while we still have this stack trace.
1483 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1484 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1485 _index++;
1486 }
1487
1488 };
1489
1490 Symbol* get_source_file_name(InstanceKlass* holder, int version) {
1491 // Find the specific ik version that contains this source_file_name_index
1492 // via the previous versions list, but use the current version's
1493 // constant pool to look it up. The previous version's index has been
1494 // merged for the current constant pool.
1495 InstanceKlass* ik = holder->get_klass_version(version);
1496 // This version has been cleaned up.
1497 if (ik == NULL) return NULL;
1498 int source_file_name_index = ik->source_file_name_index();
1499 return (source_file_name_index == 0) ?
1500 (Symbol*)NULL : holder->constants()->symbol_at(source_file_name_index);
1501 }
1502
1503 // Print stack trace element to resource allocated buffer
1504 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
1505 int method_id, int version, int bci, int cpref) {
1506
1507 // Get strings and string lengths
1508 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1509 const char* klass_name = holder->external_name();
1510 int buf_len = (int)strlen(klass_name);
1511
1512 Method* method = holder->method_with_orig_idnum(method_id, version);
1513
1514 // The method can be NULL if the requested class version is gone
1515 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1516 char* method_name = sym->as_C_string();
1517 buf_len += (int)strlen(method_name);
1518
1519 char* source_file_name = NULL;
1520 Symbol* source = get_source_file_name(holder, version);
1521 if (source != NULL) {
1522 source_file_name = source->as_C_string();
1523 buf_len += (int)strlen(source_file_name);
1524 }
1525
1526 // Allocate temporary buffer with extra space for formatting and line number
1527 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1528
1529 // Print stack trace line in buffer
1530 sprintf(buf, "\tat %s.%s", klass_name, method_name);
1531
1532 if (!version_matches(method, version)) {
1533 strcat(buf, "(Redefined)");
1534 } else {
1535 int line_number = get_line_number(method, bci);
1536 if (line_number == -2) {
1537 strcat(buf, "(Native Method)");
1538 } else {
1539 if (source_file_name != NULL && (line_number != -1)) {
1540 // Sourcename and linenumber
1541 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1542 } else if (source_file_name != NULL) {
1543 // Just sourcename
1544 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1545 } else {
1546 // Neither sourcename nor linenumber
1547 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1548 }
1549 nmethod* nm = method->code();
1550 if (WizardMode && nm != NULL) {
1551 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1552 }
1553 }
1554 }
1555
1556 return buf;
1557 }
1558
1559 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror,
1560 int method_id, int version, int bci, int cpref) {
1561 ResourceMark rm;
1562 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci, cpref);
1563 st->print_cr("%s", buf);
1564 }
1565
1566 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) {
1567 Handle mirror = method->method_holder()->java_mirror();
1568 int method_id = method->orig_method_idnum();
1569 int version = method->constants()->version();
1570 int cpref = method->name_index();
1571 print_stack_element(st, mirror, method_id, version, bci, cpref);
1572 }
1573
1574 const char* java_lang_Throwable::no_stack_trace_message() {
1575 return "\t<<no stack trace available>>";
1576 }
1577
1578
1579 // Currently used only for exceptions occurring during startup
1580 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1581 Thread *THREAD = Thread::current();
1582 Handle h_throwable(THREAD, throwable);
1583 while (h_throwable.not_null()) {
1584 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1585 if (result.is_null()) {
1586 st->print_raw_cr(no_stack_trace_message());
1587 return;
1588 }
1589
1590 while (result.not_null()) {
1591
1592 // Get method id, bci, version and mirror from chunk
1593 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result));
1594 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result));
1595 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result));
1596 typeArrayHandle cprefs (THREAD, BacktraceBuilder::get_cprefs(result));
1597
1598 int length = methods()->length();
1599 for (int index = 0; index < length; index++) {
1600 Handle mirror(THREAD, mirrors->obj_at(index));
1601 // NULL mirror means end of stack trace
1602 if (mirror.is_null()) goto handle_cause;
1603 int method = methods->short_at(index);
1604 int version = version_at(bcis->int_at(index));
1605 int bci = bci_at(bcis->int_at(index));
1606 int cpref = cprefs->short_at(index);
1607 print_stack_element(st, mirror, method, version, bci, cpref);
1608 }
1609 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1610 }
1611 handle_cause:
1612 {
1613 EXCEPTION_MARK;
1614 JavaValue cause(T_OBJECT);
1615 JavaCalls::call_virtual(&cause,
1616 h_throwable,
1617 KlassHandle(THREAD, h_throwable->klass()),
1618 vmSymbols::getCause_name(),
1619 vmSymbols::void_throwable_signature(),
1620 THREAD);
1621 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1622 if (HAS_PENDING_EXCEPTION) {
1623 CLEAR_PENDING_EXCEPTION;
1624 h_throwable = Handle();
1625 } else {
1626 h_throwable = Handle(THREAD, (oop) cause.get_jobject());
1627 if (h_throwable.not_null()) {
1628 st->print("Caused by: ");
1629 print(h_throwable, st);
1630 st->cr();
1631 }
1632 }
1633 }
1634 }
1635 }
1636
1637 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) {
1638 if (!StackTraceInThrowable) return;
1639 ResourceMark rm(THREAD);
1640
1641 // Start out by clearing the backtrace for this object, in case the VM
1642 // runs out of memory while allocating the stack trace
1643 set_backtrace(throwable(), NULL);
1644 // Clear lazily constructed Java level stacktrace if refilling occurs
1645 // This is unnecessary in 1.7+ but harmless
1646 clear_stacktrace(throwable());
1647
1648 int max_depth = MaxJavaStackTraceDepth;
1649 JavaThread* thread = (JavaThread*)THREAD;
1650 BacktraceBuilder bt(CHECK);
1651
1652 // If there is no Java frame just return the method that was being called
1653 // with bci 0
1654 if (!thread->has_last_Java_frame()) {
1655 if (max_depth >= 1 && method() != NULL) {
1656 bt.push(method(), 0, CHECK);
1657 set_backtrace(throwable(), bt.backtrace());
1658 }
1659 return;
1660 }
1661
1662 // Instead of using vframe directly, this version of fill_in_stack_trace
1663 // basically handles everything by hand. This significantly improved the
1664 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1665 // See bug 6333838 for more details.
1666 // The "ASSERT" here is to verify this method generates the exactly same stack
1667 // trace as utilizing vframe.
1668 #ifdef ASSERT
1669 vframeStream st(thread);
1670 methodHandle st_method(THREAD, st.method());
1671 #endif
1672 int total_count = 0;
1673 RegisterMap map(thread, false);
1674 int decode_offset = 0;
1675 nmethod* nm = NULL;
1676 bool skip_fillInStackTrace_check = false;
1677 bool skip_throwableInit_check = false;
1678 bool skip_hidden = !ShowHiddenFrames;
1679
1680 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1681 Method* method = NULL;
1682 int bci = 0;
1683
1684 // Compiled java method case.
1685 if (decode_offset != 0) {
1686 DebugInfoReadStream stream(nm, decode_offset);
1687 decode_offset = stream.read_int();
1688 method = (Method*)nm->metadata_at(stream.read_int());
1689 bci = stream.read_bci();
1690 } else {
1691 if (fr.is_first_frame()) break;
1692 address pc = fr.pc();
1693 if (fr.is_interpreted_frame()) {
1694 address bcp = fr.interpreter_frame_bcp();
1695 method = fr.interpreter_frame_method();
1696 bci = method->bci_from(bcp);
1697 fr = fr.sender(&map);
1698 } else {
1699 CodeBlob* cb = fr.cb();
1700 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1701 // but non nmethod
1702 fr = fr.sender(&map);
1703 if (cb == NULL || !cb->is_nmethod()) {
1704 continue;
1705 }
1706 nm = (nmethod*)cb;
1707 if (nm->method()->is_native()) {
1708 method = nm->method();
1709 bci = 0;
1710 } else {
1711 PcDesc* pd = nm->pc_desc_at(pc);
1712 decode_offset = pd->scope_decode_offset();
1713 // if decode_offset is not equal to 0, it will execute the
1714 // "compiled java method case" at the beginning of the loop.
1715 continue;
1716 }
1717 }
1718 }
1719 #ifdef ASSERT
1720 assert(st_method() == method && st.bci() == bci,
1721 "Wrong stack trace");
1722 st.next();
1723 // vframeStream::method isn't GC-safe so store off a copy
1724 // of the Method* in case we GC.
1725 if (!st.at_end()) {
1726 st_method = st.method();
1727 }
1728 #endif
1729
1730 // the format of the stacktrace will be:
1731 // - 1 or more fillInStackTrace frames for the exception class (skipped)
1732 // - 0 or more <init> methods for the exception class (skipped)
1733 // - rest of the stack
1734
1735 if (!skip_fillInStackTrace_check) {
1736 if (method->name() == vmSymbols::fillInStackTrace_name() &&
1737 throwable->is_a(method->method_holder())) {
1738 continue;
1739 }
1740 else {
1741 skip_fillInStackTrace_check = true; // gone past them all
1742 }
1743 }
1744 if (!skip_throwableInit_check) {
1745 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1746
1747 // skip <init> methods of the exception class and superclasses
1748 // This is simlar to classic VM.
1749 if (method->name() == vmSymbols::object_initializer_name() &&
1750 throwable->is_a(method->method_holder())) {
1751 continue;
1752 } else {
1753 // there are none or we've seen them all - either way stop checking
1754 skip_throwableInit_check = true;
1755 }
1756 }
1757 if (method->is_hidden()) {
1758 if (skip_hidden) continue;
1759 }
1760 bt.push(method, bci, CHECK);
1761 total_count++;
1762 }
1763
1764 // Put completed stack trace into throwable object
1765 set_backtrace(throwable(), bt.backtrace());
1766 }
1767
1768 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) {
1769 // No-op if stack trace is disabled
1770 if (!StackTraceInThrowable) {
1771 return;
1772 }
1773
1774 // Disable stack traces for some preallocated out of memory errors
1775 if (!Universe::should_fill_in_stack_trace(throwable)) {
1776 return;
1777 }
1778
1779 PRESERVE_EXCEPTION_MARK;
1780
1781 JavaThread* thread = JavaThread::active();
1782 fill_in_stack_trace(throwable, method, thread);
1783 // ignore exceptions thrown during stack trace filling
1784 CLEAR_PENDING_EXCEPTION;
1785 }
1786
1787 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1788 // Allocate stack trace - backtrace is created but not filled in
1789
1790 // No-op if stack trace is disabled
1791 if (!StackTraceInThrowable) return;
1792 BacktraceBuilder bt(CHECK); // creates a backtrace
1793 set_backtrace(throwable(), bt.backtrace());
1794 }
1795
1796
1797 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1798 // Fill in stack trace into preallocated backtrace (no GC)
1799
1800 // No-op if stack trace is disabled
1801 if (!StackTraceInThrowable) return;
1802
1803 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1804
1805 JavaThread* THREAD = JavaThread::current();
1806
1807 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
1808 assert(backtrace.not_null(), "backtrace should have been preallocated");
1809
1810 ResourceMark rm(THREAD);
1811 vframeStream st(THREAD);
1812
1813 BacktraceBuilder bt(backtrace);
1814
1815 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1816 // methods as preallocated errors aren't created by "java" code.
1817
1818 // fill in as much stack trace as possible
1819 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace);
1820 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1821 int chunk_count = 0;
1822
1823 for (;!st.at_end(); st.next()) {
1824 bt.push(st.method(), st.bci(), CHECK);
1825 chunk_count++;
1826
1827 // Bail-out for deep stacks
1828 if (chunk_count >= max_chunks) break;
1829 }
1830
1831 // We support the Throwable immutability protocol defined for Java 7.
1832 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
1833 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
1834 }
1835
1836
1837 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1838 if (throwable == NULL) {
1839 THROW_0(vmSymbols::java_lang_NullPointerException());
1840 }
1841 objArrayOop chunk = objArrayOop(backtrace(throwable));
1842 int depth = 0;
1843 if (chunk != NULL) {
1844 // Iterate over chunks and count full ones
1845 while (true) {
1846 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1847 if (next == NULL) break;
1848 depth += trace_chunk_size;
1849 chunk = next;
1850 }
1851 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1852 // Count element in remaining partial chunk. NULL value for mirror
1853 // marks the end of the stack trace elements that are saved.
1854 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1855 assert(mirrors != NULL, "sanity check");
1856 for (int i = 0; i < mirrors->length(); i++) {
1857 if (mirrors->obj_at(i) == NULL) break;
1858 depth++;
1859 }
1860 }
1861 return depth;
1862 }
1863
1864
1865 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1866 if (throwable == NULL) {
1867 THROW_0(vmSymbols::java_lang_NullPointerException());
1868 }
1869 if (index < 0) {
1870 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1871 }
1872 // Compute how many chunks to skip and index into actual chunk
1873 objArrayOop chunk = objArrayOop(backtrace(throwable));
1874 int skip_chunks = index / trace_chunk_size;
1875 int chunk_index = index % trace_chunk_size;
1876 while (chunk != NULL && skip_chunks > 0) {
1877 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1878 skip_chunks--;
1879 }
1880 if (chunk == NULL) {
1881 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1882 }
1883 // Get method id, bci, version, mirror and cpref from chunk
1884 typeArrayOop methods = BacktraceBuilder::get_methods(chunk);
1885 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk);
1886 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1887 typeArrayOop cprefs = BacktraceBuilder::get_cprefs(chunk);
1888
1889 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check");
1890
1891 int method = methods->short_at(chunk_index);
1892 int version = version_at(bcis->int_at(chunk_index));
1893 int bci = bci_at(bcis->int_at(chunk_index));
1894 int cpref = cprefs->short_at(chunk_index);
1895 Handle mirror(THREAD, mirrors->obj_at(chunk_index));
1896
1897 // Chunk can be partial full
1898 if (mirror.is_null()) {
1899 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1900 }
1901 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, cpref, CHECK_0);
1902 return element;
1903 }
1904
1905 oop java_lang_StackTraceElement::create(Handle mirror, int method_id,
1906 int version, int bci, int cpref, TRAPS) {
1907 // Allocate java.lang.StackTraceElement instance
1908 Klass* k = SystemDictionary::StackTraceElement_klass();
1909 assert(k != NULL, "must be loaded in 1.4+");
1910 instanceKlassHandle ik (THREAD, k);
1911 if (ik->should_be_initialized()) {
1912 ik->initialize(CHECK_0);
1913 }
1914
1915 Handle element = ik->allocate_instance_handle(CHECK_0);
1916 // Fill in class name
1917 ResourceMark rm(THREAD);
1918 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1919 const char* str = holder->external_name();
1920 oop classname = StringTable::intern((char*) str, CHECK_0);
1921 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1922
1923 Method* method = holder->method_with_orig_idnum(method_id, version);
1924
1925 // The method can be NULL if the requested class version is gone
1926 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1927
1928 // Fill in method name
1929 oop methodname = StringTable::intern(sym, CHECK_0);
1930 java_lang_StackTraceElement::set_methodName(element(), methodname);
1931
1932 if (!version_matches(method, version)) {
1933 // The method was redefined, accurate line number information isn't available
1934 java_lang_StackTraceElement::set_fileName(element(), NULL);
1935 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1936 } else {
1937 // Fill in source file name and line number.
1938 Symbol* source = get_source_file_name(holder, version);
1939 if (ShowHiddenFrames && source == NULL)
1940 source = vmSymbols::unknown_class_name();
1941 oop filename = StringTable::intern(source, CHECK_0);
1942 java_lang_StackTraceElement::set_fileName(element(), filename);
1943
1944 int line_number = get_line_number(method, bci);
1945 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1946 }
1947 return element();
1948 }
1949
1950 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1951 Handle mirror (THREAD, method->method_holder()->java_mirror());
1952 int method_id = method->orig_method_idnum();
1953 int cpref = method->name_index();
1954 return create(mirror, method_id, method->constants()->version(), bci, cpref, THREAD);
1955 }
1956
1957 void java_lang_reflect_AccessibleObject::compute_offsets() {
1958 Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
1959 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1960 }
1961
1962 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1963 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1964 return (jboolean) reflect->bool_field(override_offset);
1965 }
1966
1967 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1968 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1969 reflect->bool_field_put(override_offset, (int) value);
1970 }
1971
1972 void java_lang_reflect_Method::compute_offsets() {
1973 Klass* k = SystemDictionary::reflect_Method_klass();
1974 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1975 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1976 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1977 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1978 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1979 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1980 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1981 // The generic signature and annotations fields are only present in 1.5
1982 signature_offset = -1;
1983 annotations_offset = -1;
1984 parameter_annotations_offset = -1;
1985 annotation_default_offset = -1;
1986 type_annotations_offset = -1;
1987 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1988 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1989 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1990 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1991 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
1992 }
1993
1994 Handle java_lang_reflect_Method::create(TRAPS) {
1995 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1996 Klass* klass = SystemDictionary::reflect_Method_klass();
1997 // This class is eagerly initialized during VM initialization, since we keep a refence
1998 // to one of the methods
1999 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2000 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2001 }
2002
2003 oop java_lang_reflect_Method::clazz(oop reflect) {
2004 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2005 return reflect->obj_field(clazz_offset);
2006 }
2007
2008 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2009 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2010 reflect->obj_field_put(clazz_offset, value);
2011 }
2012
2013 int java_lang_reflect_Method::slot(oop reflect) {
2014 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2015 return reflect->int_field(slot_offset);
2016 }
2017
2018 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2019 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2020 reflect->int_field_put(slot_offset, value);
2021 }
2022
2023 oop java_lang_reflect_Method::name(oop method) {
2024 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2025 return method->obj_field(name_offset);
2026 }
2027
2028 void java_lang_reflect_Method::set_name(oop method, oop value) {
2029 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2030 method->obj_field_put(name_offset, value);
2031 }
2032
2033 oop java_lang_reflect_Method::return_type(oop method) {
2034 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2035 return method->obj_field(returnType_offset);
2036 }
2037
2038 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2039 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2040 method->obj_field_put(returnType_offset, value);
2041 }
2042
2043 oop java_lang_reflect_Method::parameter_types(oop method) {
2044 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2045 return method->obj_field(parameterTypes_offset);
2046 }
2047
2048 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2049 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2050 method->obj_field_put(parameterTypes_offset, value);
2051 }
2052
2053 oop java_lang_reflect_Method::exception_types(oop method) {
2054 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2055 return method->obj_field(exceptionTypes_offset);
2056 }
2057
2058 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2059 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2060 method->obj_field_put(exceptionTypes_offset, value);
2061 }
2062
2063 int java_lang_reflect_Method::modifiers(oop method) {
2064 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2065 return method->int_field(modifiers_offset);
2066 }
2067
2068 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2069 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2070 method->int_field_put(modifiers_offset, value);
2071 }
2072
2073 bool java_lang_reflect_Method::has_signature_field() {
2074 return (signature_offset >= 0);
2075 }
2076
2077 oop java_lang_reflect_Method::signature(oop method) {
2078 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2079 assert(has_signature_field(), "signature field must be present");
2080 return method->obj_field(signature_offset);
2081 }
2082
2083 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2084 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2085 assert(has_signature_field(), "signature field must be present");
2086 method->obj_field_put(signature_offset, value);
2087 }
2088
2089 bool java_lang_reflect_Method::has_annotations_field() {
2090 return (annotations_offset >= 0);
2091 }
2092
2093 oop java_lang_reflect_Method::annotations(oop method) {
2094 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2095 assert(has_annotations_field(), "annotations field must be present");
2096 return method->obj_field(annotations_offset);
2097 }
2098
2099 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2100 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2101 assert(has_annotations_field(), "annotations field must be present");
2102 method->obj_field_put(annotations_offset, value);
2103 }
2104
2105 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2106 return (parameter_annotations_offset >= 0);
2107 }
2108
2109 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2110 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2111 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2112 return method->obj_field(parameter_annotations_offset);
2113 }
2114
2115 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2116 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2117 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2118 method->obj_field_put(parameter_annotations_offset, value);
2119 }
2120
2121 bool java_lang_reflect_Method::has_annotation_default_field() {
2122 return (annotation_default_offset >= 0);
2123 }
2124
2125 oop java_lang_reflect_Method::annotation_default(oop method) {
2126 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2127 assert(has_annotation_default_field(), "annotation default field must be present");
2128 return method->obj_field(annotation_default_offset);
2129 }
2130
2131 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2132 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2133 assert(has_annotation_default_field(), "annotation default field must be present");
2134 method->obj_field_put(annotation_default_offset, value);
2135 }
2136
2137 bool java_lang_reflect_Method::has_type_annotations_field() {
2138 return (type_annotations_offset >= 0);
2139 }
2140
2141 oop java_lang_reflect_Method::type_annotations(oop method) {
2142 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2143 assert(has_type_annotations_field(), "type_annotations field must be present");
2144 return method->obj_field(type_annotations_offset);
2145 }
2146
2147 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2148 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2149 assert(has_type_annotations_field(), "type_annotations field must be present");
2150 method->obj_field_put(type_annotations_offset, value);
2151 }
2152
2153 void java_lang_reflect_Constructor::compute_offsets() {
2154 Klass* k = SystemDictionary::reflect_Constructor_klass();
2155 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2156 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2157 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2158 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2159 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2160 // The generic signature and annotations fields are only present in 1.5
2161 signature_offset = -1;
2162 annotations_offset = -1;
2163 parameter_annotations_offset = -1;
2164 type_annotations_offset = -1;
2165 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2166 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2167 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2168 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2169 }
2170
2171 Handle java_lang_reflect_Constructor::create(TRAPS) {
2172 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2173 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2174 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2175 instanceKlassHandle klass (THREAD, k);
2176 // Ensure it is initialized
2177 klass->initialize(CHECK_NH);
2178 return klass->allocate_instance_handle(THREAD);
2179 }
2180
2181 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2182 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2183 return reflect->obj_field(clazz_offset);
2184 }
2185
2186 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2187 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2188 reflect->obj_field_put(clazz_offset, value);
2189 }
2190
2191 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2192 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2193 return constructor->obj_field(parameterTypes_offset);
2194 }
2195
2196 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2197 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2198 constructor->obj_field_put(parameterTypes_offset, value);
2199 }
2200
2201 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2202 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2203 return constructor->obj_field(exceptionTypes_offset);
2204 }
2205
2206 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2207 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2208 constructor->obj_field_put(exceptionTypes_offset, value);
2209 }
2210
2211 int java_lang_reflect_Constructor::slot(oop reflect) {
2212 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2213 return reflect->int_field(slot_offset);
2214 }
2215
2216 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2217 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2218 reflect->int_field_put(slot_offset, value);
2219 }
2220
2221 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2222 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2223 return constructor->int_field(modifiers_offset);
2224 }
2225
2226 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2227 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2228 constructor->int_field_put(modifiers_offset, value);
2229 }
2230
2231 bool java_lang_reflect_Constructor::has_signature_field() {
2232 return (signature_offset >= 0);
2233 }
2234
2235 oop java_lang_reflect_Constructor::signature(oop constructor) {
2236 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2237 assert(has_signature_field(), "signature field must be present");
2238 return constructor->obj_field(signature_offset);
2239 }
2240
2241 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2242 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2243 assert(has_signature_field(), "signature field must be present");
2244 constructor->obj_field_put(signature_offset, value);
2245 }
2246
2247 bool java_lang_reflect_Constructor::has_annotations_field() {
2248 return (annotations_offset >= 0);
2249 }
2250
2251 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2252 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2253 assert(has_annotations_field(), "annotations field must be present");
2254 return constructor->obj_field(annotations_offset);
2255 }
2256
2257 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2258 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2259 assert(has_annotations_field(), "annotations field must be present");
2260 constructor->obj_field_put(annotations_offset, value);
2261 }
2262
2263 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2264 return (parameter_annotations_offset >= 0);
2265 }
2266
2267 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2268 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2269 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2270 return method->obj_field(parameter_annotations_offset);
2271 }
2272
2273 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2274 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2275 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2276 method->obj_field_put(parameter_annotations_offset, value);
2277 }
2278
2279 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2280 return (type_annotations_offset >= 0);
2281 }
2282
2283 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2284 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2285 assert(has_type_annotations_field(), "type_annotations field must be present");
2286 return constructor->obj_field(type_annotations_offset);
2287 }
2288
2289 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2290 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2291 assert(has_type_annotations_field(), "type_annotations field must be present");
2292 constructor->obj_field_put(type_annotations_offset, value);
2293 }
2294
2295 void java_lang_reflect_Field::compute_offsets() {
2296 Klass* k = SystemDictionary::reflect_Field_klass();
2297 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2298 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2299 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
2300 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2301 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2302 // The generic signature and annotations fields are only present in 1.5
2303 signature_offset = -1;
2304 annotations_offset = -1;
2305 type_annotations_offset = -1;
2306 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2307 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2308 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2309 }
2310
2311 Handle java_lang_reflect_Field::create(TRAPS) {
2312 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2313 Symbol* name = vmSymbols::java_lang_reflect_Field();
2314 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2315 instanceKlassHandle klass (THREAD, k);
2316 // Ensure it is initialized
2317 klass->initialize(CHECK_NH);
2318 return klass->allocate_instance_handle(THREAD);
2319 }
2320
2321 oop java_lang_reflect_Field::clazz(oop reflect) {
2322 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2323 return reflect->obj_field(clazz_offset);
2324 }
2325
2326 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2327 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2328 reflect->obj_field_put(clazz_offset, value);
2329 }
2330
2331 oop java_lang_reflect_Field::name(oop field) {
2332 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2333 return field->obj_field(name_offset);
2334 }
2335
2336 void java_lang_reflect_Field::set_name(oop field, oop value) {
2337 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2338 field->obj_field_put(name_offset, value);
2339 }
2340
2341 oop java_lang_reflect_Field::type(oop field) {
2342 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2343 return field->obj_field(type_offset);
2344 }
2345
2346 void java_lang_reflect_Field::set_type(oop field, oop value) {
2347 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2348 field->obj_field_put(type_offset, value);
2349 }
2350
2351 int java_lang_reflect_Field::slot(oop reflect) {
2352 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2353 return reflect->int_field(slot_offset);
2354 }
2355
2356 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2357 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2358 reflect->int_field_put(slot_offset, value);
2359 }
2360
2361 int java_lang_reflect_Field::modifiers(oop field) {
2362 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2363 return field->int_field(modifiers_offset);
2364 }
2365
2366 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2367 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2368 field->int_field_put(modifiers_offset, value);
2369 }
2370
2371 bool java_lang_reflect_Field::has_signature_field() {
2372 return (signature_offset >= 0);
2373 }
2374
2375 oop java_lang_reflect_Field::signature(oop field) {
2376 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2377 assert(has_signature_field(), "signature field must be present");
2378 return field->obj_field(signature_offset);
2379 }
2380
2381 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2382 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2383 assert(has_signature_field(), "signature field must be present");
2384 field->obj_field_put(signature_offset, value);
2385 }
2386
2387 bool java_lang_reflect_Field::has_annotations_field() {
2388 return (annotations_offset >= 0);
2389 }
2390
2391 oop java_lang_reflect_Field::annotations(oop field) {
2392 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2393 assert(has_annotations_field(), "annotations field must be present");
2394 return field->obj_field(annotations_offset);
2395 }
2396
2397 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2398 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2399 assert(has_annotations_field(), "annotations field must be present");
2400 field->obj_field_put(annotations_offset, value);
2401 }
2402
2403 bool java_lang_reflect_Field::has_type_annotations_field() {
2404 return (type_annotations_offset >= 0);
2405 }
2406
2407 oop java_lang_reflect_Field::type_annotations(oop field) {
2408 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2409 assert(has_type_annotations_field(), "type_annotations field must be present");
2410 return field->obj_field(type_annotations_offset);
2411 }
2412
2413 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2414 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2415 assert(has_type_annotations_field(), "type_annotations field must be present");
2416 field->obj_field_put(type_annotations_offset, value);
2417 }
2418
2419 void sun_reflect_ConstantPool::compute_offsets() {
2420 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2421 // This null test can be removed post beta
2422 if (k != NULL) {
2423 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2424 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2425 }
2426 }
2427
2428 void java_lang_reflect_Parameter::compute_offsets() {
2429 Klass* k = SystemDictionary::reflect_Parameter_klass();
2430 if(NULL != k) {
2431 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2432 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2433 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature());
2434 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature());
2435 }
2436 }
2437
2438 Handle java_lang_reflect_Parameter::create(TRAPS) {
2439 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2440 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2441 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2442 instanceKlassHandle klass (THREAD, k);
2443 // Ensure it is initialized
2444 klass->initialize(CHECK_NH);
2445 return klass->allocate_instance_handle(THREAD);
2446 }
2447
2448 oop java_lang_reflect_Parameter::name(oop param) {
2449 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2450 return param->obj_field(name_offset);
2451 }
2452
2453 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2454 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2455 param->obj_field_put(name_offset, value);
2456 }
2457
2458 int java_lang_reflect_Parameter::modifiers(oop param) {
2459 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2460 return param->int_field(modifiers_offset);
2461 }
2462
2463 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2464 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2465 param->int_field_put(modifiers_offset, value);
2466 }
2467
2468 int java_lang_reflect_Parameter::index(oop param) {
2469 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2470 return param->int_field(index_offset);
2471 }
2472
2473 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2474 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2475 param->int_field_put(index_offset, value);
2476 }
2477
2478 oop java_lang_reflect_Parameter::executable(oop param) {
2479 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2480 return param->obj_field(executable_offset);
2481 }
2482
2483 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2484 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2485 param->obj_field_put(executable_offset, value);
2486 }
2487
2488
2489 Handle sun_reflect_ConstantPool::create(TRAPS) {
2490 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2491 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2492 instanceKlassHandle klass (THREAD, k);
2493 // Ensure it is initialized
2494 klass->initialize(CHECK_NH);
2495 return klass->allocate_instance_handle(THREAD);
2496 }
2497
2498
2499 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2500 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2501 oop mirror = value->pool_holder()->java_mirror();
2502 // Save the mirror to get back the constant pool.
2503 reflect->obj_field_put(_oop_offset, mirror);
2504 }
2505
2506 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) {
2507 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2508
2509 oop mirror = reflect->obj_field(_oop_offset);
2510 Klass* k = java_lang_Class::as_Klass(mirror);
2511 assert(k->oop_is_instance(), "Must be");
2512
2513 // Get the constant pool back from the klass. Since class redefinition
2514 // merges the new constant pool into the old, this is essentially the
2515 // same constant pool as the original. If constant pool merging is
2516 // no longer done in the future, this will have to change to save
2517 // the original.
2518 return InstanceKlass::cast(k)->constants();
2519 }
2520
2521 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2522 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2523 // This null test can be removed post beta
2524 if (k != NULL) {
2525 compute_offset(_base_offset, k,
2526 vmSymbols::base_name(), vmSymbols::object_signature());
2527 }
2528 }
2529
2530 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2531 Klass* k = SystemDictionary::box_klass(type);
2532 if (k == NULL) return NULL;
2533 instanceKlassHandle h (THREAD, k);
2534 if (!h->is_initialized()) h->initialize(CHECK_0);
2535 return h->allocate_instance(THREAD);
2536 }
2537
2538
2539 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2540 oop box = initialize_and_allocate(type, CHECK_0);
2541 if (box == NULL) return NULL;
2542 switch (type) {
2543 case T_BOOLEAN:
2544 box->bool_field_put(value_offset, value->z);
2545 break;
2546 case T_CHAR:
2547 box->char_field_put(value_offset, value->c);
2548 break;
2549 case T_FLOAT:
2550 box->float_field_put(value_offset, value->f);
2551 break;
2552 case T_DOUBLE:
2553 box->double_field_put(long_value_offset, value->d);
2554 break;
2555 case T_BYTE:
2556 box->byte_field_put(value_offset, value->b);
2557 break;
2558 case T_SHORT:
2559 box->short_field_put(value_offset, value->s);
2560 break;
2561 case T_INT:
2562 box->int_field_put(value_offset, value->i);
2563 break;
2564 case T_LONG:
2565 box->long_field_put(long_value_offset, value->j);
2566 break;
2567 default:
2568 return NULL;
2569 }
2570 return box;
2571 }
2572
2573
2574 BasicType java_lang_boxing_object::basic_type(oop box) {
2575 if (box == NULL) return T_ILLEGAL;
2576 BasicType type = SystemDictionary::box_klass_type(box->klass());
2577 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2578 return T_ILLEGAL;
2579 return type;
2580 }
2581
2582
2583 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2584 BasicType type = SystemDictionary::box_klass_type(box->klass());
2585 switch (type) {
2586 case T_BOOLEAN:
2587 value->z = box->bool_field(value_offset);
2588 break;
2589 case T_CHAR:
2590 value->c = box->char_field(value_offset);
2591 break;
2592 case T_FLOAT:
2593 value->f = box->float_field(value_offset);
2594 break;
2595 case T_DOUBLE:
2596 value->d = box->double_field(long_value_offset);
2597 break;
2598 case T_BYTE:
2599 value->b = box->byte_field(value_offset);
2600 break;
2601 case T_SHORT:
2602 value->s = box->short_field(value_offset);
2603 break;
2604 case T_INT:
2605 value->i = box->int_field(value_offset);
2606 break;
2607 case T_LONG:
2608 value->j = box->long_field(long_value_offset);
2609 break;
2610 default:
2611 return T_ILLEGAL;
2612 } // end switch
2613 return type;
2614 }
2615
2616
2617 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2618 BasicType type = SystemDictionary::box_klass_type(box->klass());
2619 switch (type) {
2620 case T_BOOLEAN:
2621 box->bool_field_put(value_offset, value->z);
2622 break;
2623 case T_CHAR:
2624 box->char_field_put(value_offset, value->c);
2625 break;
2626 case T_FLOAT:
2627 box->float_field_put(value_offset, value->f);
2628 break;
2629 case T_DOUBLE:
2630 box->double_field_put(long_value_offset, value->d);
2631 break;
2632 case T_BYTE:
2633 box->byte_field_put(value_offset, value->b);
2634 break;
2635 case T_SHORT:
2636 box->short_field_put(value_offset, value->s);
2637 break;
2638 case T_INT:
2639 box->int_field_put(value_offset, value->i);
2640 break;
2641 case T_LONG:
2642 box->long_field_put(long_value_offset, value->j);
2643 break;
2644 default:
2645 return T_ILLEGAL;
2646 } // end switch
2647 return type;
2648 }
2649
2650
2651 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2652 switch (type) {
2653 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2654 case T_CHAR: st->print("%d", value->c); break;
2655 case T_BYTE: st->print("%d", value->b); break;
2656 case T_SHORT: st->print("%d", value->s); break;
2657 case T_INT: st->print("%d", value->i); break;
2658 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2659 case T_FLOAT: st->print("%f", value->f); break;
2660 case T_DOUBLE: st->print("%lf", value->d); break;
2661 default: st->print("type %d?", type); break;
2662 }
2663 }
2664
2665
2666 // Support for java_lang_ref_Reference
2667 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() {
2668 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2669 address addr = ik->static_field_addr(static_lock_offset);
2670 return (HeapWord*) addr;
2671 }
2672
2673 oop java_lang_ref_Reference::pending_list_lock() {
2674 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2675 address addr = ik->static_field_addr(static_lock_offset);
2676 if (UseCompressedOops) {
2677 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2678 } else {
2679 return oopDesc::load_decode_heap_oop((oop*)addr);
2680 }
2681 }
2682
2683 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2684 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2685 address addr = ik->static_field_addr(static_pending_offset);
2686 // XXX This might not be HeapWord aligned, almost rather be char *.
2687 return (HeapWord*)addr;
2688 }
2689
2690 oop java_lang_ref_Reference::pending_list() {
2691 char *addr = (char *)pending_list_addr();
2692 if (UseCompressedOops) {
2693 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2694 } else {
2695 return oopDesc::load_decode_heap_oop((oop*)addr);
2696 }
2697 }
2698
2699
2700 // Support for java_lang_ref_SoftReference
2701
2702 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2703 return ref->long_field(timestamp_offset);
2704 }
2705
2706 jlong java_lang_ref_SoftReference::clock() {
2707 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2708 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2709 return *offset;
2710 }
2711
2712 void java_lang_ref_SoftReference::set_clock(jlong value) {
2713 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2714 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2715 *offset = value;
2716 }
2717
2718 // Support for java_lang_invoke_DirectMethodHandle
2719
2720 int java_lang_invoke_DirectMethodHandle::_member_offset;
2721
2722 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
2723 oop member_name = NULL;
2724 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
2725 assert(is_dmh, "a DirectMethodHandle oop is expected");
2726 if (is_dmh) {
2727 member_name = dmh->obj_field(member_offset_in_bytes());
2728 }
2729 return member_name;
2730 }
2731
2732 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
2733 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
2734 if (klass_oop != NULL) {
2735 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2736 }
2737 }
2738
2739 // Support for java_lang_invoke_MethodHandle
2740
2741 int java_lang_invoke_MethodHandle::_type_offset;
2742 int java_lang_invoke_MethodHandle::_form_offset;
2743
2744 int java_lang_invoke_MemberName::_clazz_offset;
2745 int java_lang_invoke_MemberName::_name_offset;
2746 int java_lang_invoke_MemberName::_type_offset;
2747 int java_lang_invoke_MemberName::_flags_offset;
2748 int java_lang_invoke_MemberName::_vmtarget_offset;
2749 int java_lang_invoke_MemberName::_vmloader_offset;
2750 int java_lang_invoke_MemberName::_vmindex_offset;
2751
2752 int java_lang_invoke_LambdaForm::_vmentry_offset;
2753
2754 void java_lang_invoke_MethodHandle::compute_offsets() {
2755 Klass* klass_oop = SystemDictionary::MethodHandle_klass();
2756 if (klass_oop != NULL) {
2757 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
2758 compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
2759 }
2760 }
2761
2762 void java_lang_invoke_MemberName::compute_offsets() {
2763 Klass* klass_oop = SystemDictionary::MemberName_klass();
2764 if (klass_oop != NULL) {
2765 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature());
2766 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature());
2767 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature());
2768 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature());
2769 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2770 }
2771 }
2772
2773 void java_lang_invoke_LambdaForm::compute_offsets() {
2774 Klass* klass_oop = SystemDictionary::LambdaForm_klass();
2775 if (klass_oop != NULL) {
2776 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2777 }
2778 }
2779
2780 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
2781 return obj != NULL && is_subclass(obj->klass());
2782 }
2783
2784
2785 oop java_lang_invoke_MethodHandle::type(oop mh) {
2786 return mh->obj_field(_type_offset);
2787 }
2788
2789 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
2790 mh->obj_field_put(_type_offset, mtype);
2791 }
2792
2793 oop java_lang_invoke_MethodHandle::form(oop mh) {
2794 assert(_form_offset != 0, "");
2795 return mh->obj_field(_form_offset);
2796 }
2797
2798 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
2799 assert(_form_offset != 0, "");
2800 mh->obj_field_put(_form_offset, lform);
2801 }
2802
2803 /// MemberName accessors
2804
2805 oop java_lang_invoke_MemberName::clazz(oop mname) {
2806 assert(is_instance(mname), "wrong type");
2807 return mname->obj_field(_clazz_offset);
2808 }
2809
2810 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
2811 assert(is_instance(mname), "wrong type");
2812 mname->obj_field_put(_clazz_offset, clazz);
2813 }
2814
2815 oop java_lang_invoke_MemberName::name(oop mname) {
2816 assert(is_instance(mname), "wrong type");
2817 return mname->obj_field(_name_offset);
2818 }
2819
2820 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
2821 assert(is_instance(mname), "wrong type");
2822 mname->obj_field_put(_name_offset, name);
2823 }
2824
2825 oop java_lang_invoke_MemberName::type(oop mname) {
2826 assert(is_instance(mname), "wrong type");
2827 return mname->obj_field(_type_offset);
2828 }
2829
2830 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
2831 assert(is_instance(mname), "wrong type");
2832 mname->obj_field_put(_type_offset, type);
2833 }
2834
2835 int java_lang_invoke_MemberName::flags(oop mname) {
2836 assert(is_instance(mname), "wrong type");
2837 return mname->int_field(_flags_offset);
2838 }
2839
2840 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
2841 assert(is_instance(mname), "wrong type");
2842 mname->int_field_put(_flags_offset, flags);
2843 }
2844
2845 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
2846 assert(is_instance(mname), "wrong type");
2847 return (Metadata*)mname->address_field(_vmtarget_offset);
2848 }
2849
2850 bool java_lang_invoke_MemberName::is_method(oop mname) {
2851 assert(is_instance(mname), "must be MemberName");
2852 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
2853 }
2854
2855 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
2856 assert(is_instance(mname), "wrong type");
2857 // check the type of the vmtarget
2858 oop dependency = NULL;
2859 if (ref != NULL) {
2860 switch (flags(mname) & (MN_IS_METHOD |
2861 MN_IS_CONSTRUCTOR |
2862 MN_IS_FIELD)) {
2863 case MN_IS_METHOD:
2864 case MN_IS_CONSTRUCTOR:
2865 assert(ref->is_method(), "should be a method");
2866 dependency = ((Method*)ref)->method_holder()->java_mirror();
2867 break;
2868 case MN_IS_FIELD:
2869 assert(ref->is_klass(), "should be a class");
2870 dependency = ((Klass*)ref)->java_mirror();
2871 break;
2872 default:
2873 ShouldNotReachHere();
2874 }
2875 }
2876 mname->address_field_put(_vmtarget_offset, (address)ref);
2877 // Add a reference to the loader (actually mirror because anonymous classes will not have
2878 // distinct loaders) to ensure the metadata is kept alive
2879 // This mirror may be different than the one in clazz field.
2880 mname->obj_field_put(_vmloader_offset, dependency);
2881 }
2882
2883 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
2884 assert(is_instance(mname), "wrong type");
2885 return (intptr_t) mname->address_field(_vmindex_offset);
2886 }
2887
2888 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
2889 assert(is_instance(mname), "wrong type");
2890 mname->address_field_put(_vmindex_offset, (address) index);
2891 }
2892
2893 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
2894 assert(is_instance(lform), "wrong type");
2895 return lform->obj_field(_vmentry_offset);
2896 }
2897
2898
2899 // Support for java_lang_invoke_MethodType
2900
2901 int java_lang_invoke_MethodType::_rtype_offset;
2902 int java_lang_invoke_MethodType::_ptypes_offset;
2903
2904 void java_lang_invoke_MethodType::compute_offsets() {
2905 Klass* k = SystemDictionary::MethodType_klass();
2906 if (k != NULL) {
2907 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2908 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2909 }
2910 }
2911
2912 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
2913 st->print("(");
2914 objArrayOop pts = ptypes(mt);
2915 for (int i = 0, limit = pts->length(); i < limit; i++) {
2916 java_lang_Class::print_signature(pts->obj_at(i), st);
2917 }
2918 st->print(")");
2919 java_lang_Class::print_signature(rtype(mt), st);
2920 }
2921
2922 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2923 ResourceMark rm;
2924 stringStream buffer(128);
2925 print_signature(mt, &buffer);
2926 const char* sigstr = buffer.base();
2927 int siglen = (int) buffer.size();
2928 Symbol *name;
2929 if (!intern_if_not_found) {
2930 name = SymbolTable::probe(sigstr, siglen);
2931 } else {
2932 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2933 }
2934 return name;
2935 }
2936
2937 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
2938 if (mt1 == mt2)
2939 return true;
2940 if (rtype(mt1) != rtype(mt2))
2941 return false;
2942 if (ptype_count(mt1) != ptype_count(mt2))
2943 return false;
2944 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
2945 if (ptype(mt1, i) != ptype(mt2, i))
2946 return false;
2947 }
2948 return true;
2949 }
2950
2951 oop java_lang_invoke_MethodType::rtype(oop mt) {
2952 assert(is_instance(mt), "must be a MethodType");
2953 return mt->obj_field(_rtype_offset);
2954 }
2955
2956 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
2957 assert(is_instance(mt), "must be a MethodType");
2958 return (objArrayOop) mt->obj_field(_ptypes_offset);
2959 }
2960
2961 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
2962 return ptypes(mt)->obj_at(idx);
2963 }
2964
2965 int java_lang_invoke_MethodType::ptype_count(oop mt) {
2966 return ptypes(mt)->length();
2967 }
2968
2969 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
2970 objArrayOop pts = ptypes(mt);
2971 int count = pts->length();
2972 int slots = 0;
2973 for (int i = 0; i < count; i++) {
2974 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
2975 slots += type2size[bt];
2976 }
2977 return slots;
2978 }
2979
2980 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
2981 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
2982 return type2size[bt];
2983 }
2984
2985
2986 // Support for java_lang_invoke_CallSite
2987
2988 int java_lang_invoke_CallSite::_target_offset;
2989 int java_lang_invoke_CallSite::_context_offset;
2990
2991 void java_lang_invoke_CallSite::compute_offsets() {
2992 Klass* k = SystemDictionary::CallSite_klass();
2993 if (k != NULL) {
2994 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
2995 compute_offset(_context_offset, k, vmSymbols::context_name(),
2996 vmSymbols::java_lang_invoke_MethodHandleNatives_CallSiteContext_signature());
2997 }
2998 }
2999
3000 oop java_lang_invoke_CallSite::context(oop call_site) {
3001 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3002
3003 oop dep_oop = call_site->obj_field(_context_offset);
3004 return dep_oop;
3005 }
3006
3007 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3008
3009 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3010
3011 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3012 Klass* k = SystemDictionary::Context_klass();
3013 if (k != NULL) {
3014 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3015 }
3016 }
3017
3018 nmethodBucket* java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3019 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3020 return (nmethodBucket*) (address) call_site->long_field(_vmdependencies_offset);
3021 }
3022
3023 void java_lang_invoke_MethodHandleNatives_CallSiteContext::set_vmdependencies(oop call_site, nmethodBucket* context) {
3024 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3025 call_site->long_field_put(_vmdependencies_offset, (jlong) (address) context);
3026 }
3027
3028 // Support for java_security_AccessControlContext
3029
3030 int java_security_AccessControlContext::_context_offset = 0;
3031 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3032 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3033 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3034
3035 void java_security_AccessControlContext::compute_offsets() {
3036 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3037 fieldDescriptor fd;
3038 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass());
3039
3040 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
3041 fatal("Invalid layout of java.security.AccessControlContext");
3042 }
3043 _context_offset = fd.offset();
3044
3045 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
3046 fatal("Invalid layout of java.security.AccessControlContext");
3047 }
3048 _privilegedContext_offset = fd.offset();
3049
3050 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
3051 fatal("Invalid layout of java.security.AccessControlContext");
3052 }
3053 _isPrivileged_offset = fd.offset();
3054
3055 // The offset may not be present for bootstrapping with older JDK.
3056 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
3057 _isAuthorized_offset = fd.offset();
3058 }
3059 }
3060
3061
3062 bool java_security_AccessControlContext::is_authorized(Handle context) {
3063 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
3064 assert(_isAuthorized_offset != -1, "should be set");
3065 return context->bool_field(_isAuthorized_offset) != 0;
3066 }
3067
3068 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3069 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3070 // Ensure klass is initialized
3071 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
3072 // Allocate result
3073 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
3074 // Fill in values
3075 result->obj_field_put(_context_offset, context());
3076 result->obj_field_put(_privilegedContext_offset, privileged_context());
3077 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3078 // whitelist AccessControlContexts created by the JVM if present
3079 if (_isAuthorized_offset != -1) {
3080 result->bool_field_put(_isAuthorized_offset, true);
3081 }
3082 return result;
3083 }
3084
3085
3086 // Support for java_lang_ClassLoader
3087
3088 bool java_lang_ClassLoader::offsets_computed = false;
3089 int java_lang_ClassLoader::_loader_data_offset = -1;
3090 int java_lang_ClassLoader::parallelCapable_offset = -1;
3091
3092 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
3093 assert(loader != NULL && loader->is_oop(), "loader must be oop");
3094 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
3095 }
3096
3097 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
3098 return *java_lang_ClassLoader::loader_data_addr(loader);
3099 }
3100
3101 void java_lang_ClassLoader::compute_offsets() {
3102 assert(!offsets_computed, "offsets should be initialized only once");
3103 offsets_computed = true;
3104
3105 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
3106 Klass* k1 = SystemDictionary::ClassLoader_klass();
3107 compute_optional_offset(parallelCapable_offset,
3108 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
3109
3110 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3111 }
3112
3113 oop java_lang_ClassLoader::parent(oop loader) {
3114 assert(is_instance(loader), "loader must be oop");
3115 return loader->obj_field(parent_offset);
3116 }
3117
3118 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3119 assert(is_instance(loader), "loader must be oop");
3120 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3121 oop acl = loader;
3122 debug_only(jint loop_count = 0);
3123 // This loop taken verbatim from ClassLoader.java:
3124 do {
3125 acl = parent(acl);
3126 if (cl == acl) {
3127 return true;
3128 }
3129 assert(++loop_count > 0, "loop_count overflow");
3130 } while (acl != NULL);
3131 return false;
3132 }
3133
3134 bool java_lang_ClassLoader::is_instance(oop obj) {
3135 return obj != NULL && is_subclass(obj->klass());
3136 }
3137
3138
3139 // For class loader classes, parallelCapable defined
3140 // based on non-null field
3141 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3142 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3143 if (parallelCapable_offset == -1) {
3144 // Default for backward compatibility is false
3145 return false;
3146 }
3147 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3148 }
3149
3150 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3151 // Fix for 4474172; see evaluation for more details
3152 loader = non_reflection_class_loader(loader);
3153
3154 oop cl = SystemDictionary::java_system_loader();
3155 while(cl != NULL) {
3156 if (cl == loader) return true;
3157 cl = parent(cl);
3158 }
3159 return false;
3160 }
3161
3162 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3163 if (loader != NULL) {
3164 // See whether this is one of the class loaders associated with
3165 // the generated bytecodes for reflection, and if so, "magically"
3166 // delegate to its parent to prevent class loading from occurring
3167 // in places where applications using reflection didn't expect it.
3168 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3169 // This might be null in non-1.4 JDKs
3170 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
3171 return parent(loader);
3172 }
3173 }
3174 return loader;
3175 }
3176
3177
3178 // Support for java_lang_System
3179 int java_lang_System::in_offset_in_bytes() {
3180 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3181 }
3182
3183
3184 int java_lang_System::out_offset_in_bytes() {
3185 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3186 }
3187
3188
3189 int java_lang_System::err_offset_in_bytes() {
3190 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3191 }
3192
3193
3194 bool java_lang_System::has_security_manager() {
3195 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass());
3196 address addr = ik->static_field_addr(static_security_offset);
3197 if (UseCompressedOops) {
3198 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3199 } else {
3200 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3201 }
3202 }
3203
3204 int java_lang_Class::_klass_offset;
3205 int java_lang_Class::_array_klass_offset;
3206 int java_lang_Class::_oop_size_offset;
3207 int java_lang_Class::_static_oop_field_count_offset;
3208 int java_lang_Class::_class_loader_offset;
3209 int java_lang_Class::_protection_domain_offset;
3210 int java_lang_Class::_component_mirror_offset;
3211 int java_lang_Class::_init_lock_offset;
3212 int java_lang_Class::_signers_offset;
3213 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3214 int java_lang_Throwable::backtrace_offset;
3215 int java_lang_Throwable::detailMessage_offset;
3216 int java_lang_Throwable::cause_offset;
3217 int java_lang_Throwable::stackTrace_offset;
3218 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3219 int java_lang_reflect_AccessibleObject::override_offset;
3220 int java_lang_reflect_Method::clazz_offset;
3221 int java_lang_reflect_Method::name_offset;
3222 int java_lang_reflect_Method::returnType_offset;
3223 int java_lang_reflect_Method::parameterTypes_offset;
3224 int java_lang_reflect_Method::exceptionTypes_offset;
3225 int java_lang_reflect_Method::slot_offset;
3226 int java_lang_reflect_Method::modifiers_offset;
3227 int java_lang_reflect_Method::signature_offset;
3228 int java_lang_reflect_Method::annotations_offset;
3229 int java_lang_reflect_Method::parameter_annotations_offset;
3230 int java_lang_reflect_Method::annotation_default_offset;
3231 int java_lang_reflect_Method::type_annotations_offset;
3232 int java_lang_reflect_Constructor::clazz_offset;
3233 int java_lang_reflect_Constructor::parameterTypes_offset;
3234 int java_lang_reflect_Constructor::exceptionTypes_offset;
3235 int java_lang_reflect_Constructor::slot_offset;
3236 int java_lang_reflect_Constructor::modifiers_offset;
3237 int java_lang_reflect_Constructor::signature_offset;
3238 int java_lang_reflect_Constructor::annotations_offset;
3239 int java_lang_reflect_Constructor::parameter_annotations_offset;
3240 int java_lang_reflect_Constructor::type_annotations_offset;
3241 int java_lang_reflect_Field::clazz_offset;
3242 int java_lang_reflect_Field::name_offset;
3243 int java_lang_reflect_Field::type_offset;
3244 int java_lang_reflect_Field::slot_offset;
3245 int java_lang_reflect_Field::modifiers_offset;
3246 int java_lang_reflect_Field::signature_offset;
3247 int java_lang_reflect_Field::annotations_offset;
3248 int java_lang_reflect_Field::type_annotations_offset;
3249 int java_lang_reflect_Parameter::name_offset;
3250 int java_lang_reflect_Parameter::modifiers_offset;
3251 int java_lang_reflect_Parameter::index_offset;
3252 int java_lang_reflect_Parameter::executable_offset;
3253 int java_lang_boxing_object::value_offset;
3254 int java_lang_boxing_object::long_value_offset;
3255 int java_lang_ref_Reference::referent_offset;
3256 int java_lang_ref_Reference::queue_offset;
3257 int java_lang_ref_Reference::next_offset;
3258 int java_lang_ref_Reference::discovered_offset;
3259 int java_lang_ref_Reference::static_lock_offset;
3260 int java_lang_ref_Reference::static_pending_offset;
3261 int java_lang_ref_Reference::number_of_fake_oop_fields;
3262 int java_lang_ref_SoftReference::timestamp_offset;
3263 int java_lang_ref_SoftReference::static_clock_offset;
3264 int java_lang_ClassLoader::parent_offset;
3265 int java_lang_System::static_in_offset;
3266 int java_lang_System::static_out_offset;
3267 int java_lang_System::static_err_offset;
3268 int java_lang_System::static_security_offset;
3269 int java_lang_StackTraceElement::declaringClass_offset;
3270 int java_lang_StackTraceElement::methodName_offset;
3271 int java_lang_StackTraceElement::fileName_offset;
3272 int java_lang_StackTraceElement::lineNumber_offset;
3273 int java_lang_AssertionStatusDirectives::classes_offset;
3274 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3275 int java_lang_AssertionStatusDirectives::packages_offset;
3276 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3277 int java_lang_AssertionStatusDirectives::deflt_offset;
3278 int java_nio_Buffer::_limit_offset;
3279 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3280 int sun_reflect_ConstantPool::_oop_offset;
3281 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3282
3283
3284 // Support for java_lang_StackTraceElement
3285
3286 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3287 element->obj_field_put(fileName_offset, value);
3288 }
3289
3290 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3291 element->obj_field_put(declaringClass_offset, value);
3292 }
3293
3294 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3295 element->obj_field_put(methodName_offset, value);
3296 }
3297
3298 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3299 element->int_field_put(lineNumber_offset, value);
3300 }
3301
3302
3303 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3304
3305 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3306 o->obj_field_put(classes_offset, val);
3307 }
3308
3309 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3310 o->obj_field_put(classEnabled_offset, val);
3311 }
3312
3313 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3314 o->obj_field_put(packages_offset, val);
3315 }
3316
3317 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3318 o->obj_field_put(packageEnabled_offset, val);
3319 }
3320
3321 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3322 o->bool_field_put(deflt_offset, val);
3323 }
3324
3325
3326 // Support for intrinsification of java.nio.Buffer.checkIndex
3327 int java_nio_Buffer::limit_offset() {
3328 return _limit_offset;
3329 }
3330
3331
3332 void java_nio_Buffer::compute_offsets() {
3333 Klass* k = SystemDictionary::nio_Buffer_klass();
3334 assert(k != NULL, "must be loaded in 1.4+");
3335 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3336 }
3337
3338 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3339 if (_owner_offset != 0) return;
3340
3341 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3342 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3343 compute_offset(_owner_offset, k,
3344 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3345 }
3346
3347 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3348 assert(_owner_offset != 0, "Must be initialized");
3349 return obj->obj_field(_owner_offset);
3350 }
3351
3352 // Compute hard-coded offsets
3353 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3354 // are not available to determine the offset_of_static_fields.
3355 void JavaClasses::compute_hard_coded_offsets() {
3356 const int x = heapOopSize;
3357 const int header = instanceOopDesc::base_offset_in_bytes();
3358
3359 // Throwable Class
3360 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
3361 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3362 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
3363 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3364 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x;
3365
3366 // java_lang_boxing_object
3367 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3368 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3369
3370 // java_lang_ref_Reference:
3371 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3372 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3373 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
3374 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
3375 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
3376 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3377 // Artificial fields for java_lang_ref_Reference
3378 // The first field is for the discovered field added in 1.4
3379 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3380
3381 // java_lang_ref_SoftReference Class
3382 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3383 // Don't multiply static fields because they are always in wordSize units
3384 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3385
3386 // java_lang_ClassLoader
3387 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3388
3389 // java_lang_System
3390 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
3391 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3392 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3393 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3394
3395 // java_lang_StackTraceElement
3396 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
3397 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3398 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
3399 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3400 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3401 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3402 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3403 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3404 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3405
3406 }
3407
3408
3409 // Compute non-hard-coded field offsets of all the classes in this file
3410 void JavaClasses::compute_offsets() {
3411 // java_lang_Class::compute_offsets was called earlier in bootstrap
3412 java_lang_ClassLoader::compute_offsets();
3413 java_lang_Thread::compute_offsets();
3414 java_lang_ThreadGroup::compute_offsets();
3415 java_lang_invoke_MethodHandle::compute_offsets();
3416 java_lang_invoke_DirectMethodHandle::compute_offsets();
3417 java_lang_invoke_MemberName::compute_offsets();
3418 java_lang_invoke_LambdaForm::compute_offsets();
3419 java_lang_invoke_MethodType::compute_offsets();
3420 java_lang_invoke_CallSite::compute_offsets();
3421 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets();
3422 java_security_AccessControlContext::compute_offsets();
3423 // Initialize reflection classes. The layouts of these classes
3424 // changed with the new reflection implementation in JDK 1.4, and
3425 // since the Universe doesn't know what JDK version it is until this
3426 // point we defer computation of these offsets until now.
3427 java_lang_reflect_AccessibleObject::compute_offsets();
3428 java_lang_reflect_Method::compute_offsets();
3429 java_lang_reflect_Constructor::compute_offsets();
3430 java_lang_reflect_Field::compute_offsets();
3431 java_nio_Buffer::compute_offsets();
3432 sun_reflect_ConstantPool::compute_offsets();
3433 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3434 java_lang_reflect_Parameter::compute_offsets();
3435
3436 // generated interpreter code wants to know about the offsets we just computed:
3437 AbstractAssembler::update_delayed_values();
3438 }
3439
3440 #ifndef PRODUCT
3441
3442 // These functions exist to assert the validity of hard-coded field offsets to guard
3443 // against changes in the class files
3444
3445 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3446 EXCEPTION_MARK;
3447 fieldDescriptor fd;
3448 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3449 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3450 instanceKlassHandle h_klass (THREAD, k);
3451 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3452 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3453 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3454 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3455 return false;
3456 }
3457 if (fd.is_static()) {
3458 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3459 return false;
3460 }
3461 if (fd.offset() == hardcoded_offset ) {
3462 return true;
3463 } else {
3464 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3465 klass_name, field_name, hardcoded_offset, fd.offset());
3466 return false;
3467 }
3468 }
3469
3470
3471 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3472 EXCEPTION_MARK;
3473 fieldDescriptor fd;
3474 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3475 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3476 instanceKlassHandle h_klass (THREAD, k);
3477 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3478 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3479 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3480 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3481 return false;
3482 }
3483 if (!fd.is_static()) {
3484 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3485 return false;
3486 }
3487 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3488 return true;
3489 } else {
3490 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());
3491 return false;
3492 }
3493 }
3494
3495
3496 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3497 EXCEPTION_MARK;
3498 fieldDescriptor fd;
3499 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3500 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3501 instanceKlassHandle h_klass (THREAD, k);
3502 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3503 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3504 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3505 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3506 return false;
3507 }
3508 if (!fd.is_static() || !fd.has_initial_value()) {
3509 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3510 return false;
3511 }
3512 if (!fd.initial_value_tag().is_int()) {
3513 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3514 return false;
3515 }
3516 jint field_value = fd.int_initial_value();
3517 if (field_value == hardcoded_constant) {
3518 return true;
3519 } else {
3520 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);
3521 return false;
3522 }
3523 }
3524
3525
3526 // Check the hard-coded field offsets of all the classes in this file
3527
3528 void JavaClasses::check_offsets() {
3529 bool valid = true;
3530 HandleMark hm;
3531
3532 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3533 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3534
3535 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3536 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3537
3538 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3539 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3540
3541 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3542 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3543
3544 // java.lang.String
3545
3546 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3547 if (java_lang_String::has_offset_field()) {
3548 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3549 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3550 }
3551 if (java_lang_String::has_hash_field()) {
3552 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3553 }
3554
3555 // java.lang.Class
3556
3557 // Fake fields
3558 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3559 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3560
3561 // java.lang.Throwable
3562
3563 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3564 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3565 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3566 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3567
3568 // Boxed primitive objects (java_lang_boxing_object)
3569
3570 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3571 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3572 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3573 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3574 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3575 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3576 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3577 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3578
3579 // java.lang.ClassLoader
3580
3581 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3582
3583 // java.lang.System
3584
3585 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3586 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3587 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3588 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
3589
3590 // java.lang.StackTraceElement
3591
3592 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3593 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3594 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3595 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3596
3597 // java.lang.ref.Reference
3598
3599 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3600 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3601 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3602 // Fake field
3603 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3604 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3605 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3606
3607 // java.lang.ref.SoftReference
3608
3609 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3610 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3611
3612 // java.lang.AssertionStatusDirectives
3613 //
3614 // The CheckAssertionStatusDirectives boolean can be removed from here and
3615 // globals.hpp after the AssertionStatusDirectives class has been integrated
3616 // into merlin "for some time." Without it, the vm will fail with early
3617 // merlin builds.
3618
3619 if (CheckAssertionStatusDirectives) {
3620 const char* nm = "java/lang/AssertionStatusDirectives";
3621 const char* sig = "[Ljava/lang/String;";
3622 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3623 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3624 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3625 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3626 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3627 }
3628
3629 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3630 }
3631
3632 #endif // PRODUCT
3633
3634 int InjectedField::compute_offset() {
3635 Klass* klass_oop = klass();
3636 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3637 if (!may_be_java && !fs.access_flags().is_internal()) {
3638 // Only look at injected fields
3639 continue;
3640 }
3641 if (fs.name() == name() && fs.signature() == signature()) {
3642 return fs.offset();
3643 }
3644 }
3645 ResourceMark rm;
3646 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)" : "");
3647 #ifndef PRODUCT
3648 klass_oop->print();
3649 tty->print_cr("all fields:");
3650 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3651 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
3652 }
3653 #endif //PRODUCT
3654 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class");
3655 return -1;
3656 }
3657
3658 void javaClasses_init() {
3659 JavaClasses::compute_offsets();
3660 JavaClasses::check_offsets();
3661 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3662 }