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 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
57
58 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
59 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
60
61 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
62 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
63
64 InjectedField JavaClasses::_injected_fields[] = {
65 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
66 };
67
68 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
69 return _injected_fields[id].compute_offset();
70 }
71
72
73 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
74 *field_count = 0;
75
76 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
77 if (sid == vmSymbols::NO_SID) {
78 // Only well known classes can inject fields
79 return NULL;
80 }
81
82 int count = 0;
83 int start = -1;
84
85 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
86 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
87 count++; \
88 if (start == -1) start = klass##_##name##_enum; \
89 }
90 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
91 #undef LOOKUP_INJECTED_FIELD
92
93 if (start != -1) {
94 *field_count = count;
95 return _injected_fields + start;
96 }
97 return NULL;
98 }
99
100
101 static bool find_field(InstanceKlass* ik,
102 Symbol* name_symbol, Symbol* signature_symbol,
103 fieldDescriptor* fd,
104 bool is_static = false, bool allow_super = false) {
105 if (allow_super || is_static) {
106 return ik->find_field(name_symbol, signature_symbol, is_static, fd) != NULL;
107 } else {
108 return ik->find_local_field(name_symbol, signature_symbol, fd);
109 }
110 }
111
112 // Helpful routine for computing field offsets at run time rather than hardcoding them
113 static void
114 compute_offset(int &dest_offset,
115 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
116 bool is_static = false, bool allow_super = false) {
117 fieldDescriptor fd;
118 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
119 if (!find_field(ik, name_symbol, signature_symbol, &fd, is_static, allow_super)) {
120 ResourceMark rm;
121 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
122 #ifndef PRODUCT
123 klass_oop->print();
124 tty->print_cr("all fields:");
125 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
126 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
127 }
128 #endif //PRODUCT
129 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class");
130 }
131 dest_offset = fd.offset();
132 }
133
134 // Same as above but for "optional" offsets that might not be present in certain JDK versions
135 static void
136 compute_optional_offset(int& dest_offset,
137 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
138 bool allow_super = false) {
139 fieldDescriptor fd;
140 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
141 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
142 dest_offset = fd.offset();
143 }
144 }
145
146
147 int java_lang_String::value_offset = 0;
148 int java_lang_String::offset_offset = 0;
149 int java_lang_String::count_offset = 0;
150 int java_lang_String::hash_offset = 0;
151
152 bool java_lang_String::initialized = false;
153
154 bool java_lang_String::is_instance(oop obj) {
155 return is_instance_inlined(obj);
156 }
157
158 void java_lang_String::compute_offsets() {
159 assert(!initialized, "offsets should be initialized only once");
160
161 Klass* k = SystemDictionary::String_klass();
162 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature());
163 compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature());
164 compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature());
165 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature());
166
167 initialized = true;
168 }
169
170 Handle java_lang_String::basic_create(int length, TRAPS) {
171 assert(initialized, "Must be initialized");
172 // Create the String object first, so there's a chance that the String
173 // and the char array it points to end up in the same cache line.
174 oop obj;
175 obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH);
176
177 // Create the char array. The String object must be handlized here
178 // because GC can happen as a result of the allocation attempt.
179 Handle h_obj(THREAD, obj);
180 typeArrayOop buffer;
181 buffer = oopFactory::new_charArray(length, CHECK_NH);
182
183 // Point the String at the char array
184 obj = h_obj();
185 set_value(obj, buffer);
186 // No need to zero the offset, allocation zero'ed the entire String object
187 assert(offset(obj) == 0, "initial String offset should be zero");
188 //set_offset(obj, 0);
189 set_count(obj, length);
190
191 return h_obj;
192 }
193
194 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
195 Handle h_obj = basic_create(length, CHECK_NH);
196 typeArrayOop buffer = value(h_obj());
197 for (int index = 0; index < length; index++) {
198 buffer->char_at_put(index, unicode[index]);
199 }
200 return h_obj;
201 }
202
203 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
204 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
205 return h_obj();
206 }
207
208 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
209 if (utf8_str == NULL) {
210 return Handle();
211 }
212 int length = UTF8::unicode_length(utf8_str);
213 Handle h_obj = basic_create(length, CHECK_NH);
214 if (length > 0) {
215 typeArrayOop buffer = value(h_obj());
216 buffer = typeArrayOop(oopDesc::bs()->write_barrier(buffer));
217 UTF8::convert_to_unicode(utf8_str, buffer->char_at_addr(0), length);
218 }
219 return h_obj;
220 }
221
222 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
223 Handle h_obj = create_from_str(utf8_str, CHECK_0);
224 return h_obj();
225 }
226
227 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
228 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
229 Handle h_obj = basic_create(length, CHECK_NH);
230 if (length > 0) {
231 typeArrayOop buffer = value(h_obj());
232 buffer = typeArrayOop(oopDesc::bs()->write_barrier(buffer));
233 UTF8::convert_to_unicode((char*)symbol->bytes(), buffer->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 if (ShenandoahVerifyReadsToFromSpace) {
451 value = (typeArrayOop) oopDesc::bs()->read_barrier(value);
452 }
453 int offset = java_lang_String::offset(java_string);
454 int length = java_lang_String::length(java_string);
455 if (length != len) {
456 return false;
457 }
458 for (int i = 0; i < len; i++) {
459 if (value->char_at(i + offset) != chars[i]) {
460 return false;
461 }
462 }
463 return true;
464 }
465
466 bool java_lang_String::equals(oop str1, oop str2) {
467 assert(str1->klass() == SystemDictionary::String_klass(),
468 "must be java String");
469 assert(str2->klass() == SystemDictionary::String_klass(),
470 "must be java String");
471 typeArrayOop value1 = java_lang_String::value(str1);
472 int offset1 = java_lang_String::offset(str1);
473 int length1 = java_lang_String::length(str1);
474 typeArrayOop value2 = java_lang_String::value(str2);
475 int offset2 = java_lang_String::offset(str2);
476 int length2 = java_lang_String::length(str2);
477
478 if (length1 != length2) {
479 return false;
480 }
481 for (int i = 0; i < length1; i++) {
482 if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) {
483 return false;
484 }
485 }
486 return true;
487 }
488
489 void java_lang_String::print(oop java_string, outputStream* st) {
490 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
491 typeArrayOop value = java_lang_String::value(java_string);
492
493 if (value == NULL) {
494 // This can happen if, e.g., printing a String
495 // object before its initializer has been called
496 st->print("NULL");
497 return;
498 }
499
500 int offset = java_lang_String::offset(java_string);
501 int length = java_lang_String::length(java_string);
502
503 st->print("\"");
504 for (int index = 0; index < length; index++) {
505 st->print("%c", value->char_at(index + offset));
506 }
507 st->print("\"");
508 }
509
510
511 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
512 assert(mirror.not_null() && fd->is_static(), "just checking");
513 if (fd->has_initial_value()) {
514 BasicType t = fd->field_type();
515 switch (t) {
516 case T_BYTE:
517 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
518 break;
519 case T_BOOLEAN:
520 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
521 break;
522 case T_CHAR:
523 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
524 break;
525 case T_SHORT:
526 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
527 break;
528 case T_INT:
529 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
530 break;
531 case T_FLOAT:
532 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
533 break;
534 case T_DOUBLE:
535 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
536 break;
537 case T_LONG:
538 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
539 break;
540 case T_OBJECT:
541 {
542 #ifdef ASSERT
543 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
544 assert(fd->signature() == sym, "just checking");
545 #endif
546 oop string = fd->string_initial_value(CHECK);
547 mirror()->obj_field_put(fd->offset(), string);
548 }
549 break;
550 default:
551 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
552 "Illegal ConstantValue attribute in class file");
553 }
554 }
555 }
556
557
558 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) {
559 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
560
561 // If the offset was read from the shared archive, it was fixed up already
562 if (!k->is_shared()) {
563 if (k->oop_is_instance()) {
564 // During bootstrap, java.lang.Class wasn't loaded so static field
565 // offsets were computed without the size added it. Go back and
566 // update all the static field offsets to included the size.
567 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) {
568 if (fs.access_flags().is_static()) {
569 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
570 fs.set_offset(real_offset);
571 }
572 }
573 }
574 }
575 create_mirror(k, Handle(NULL), Handle(NULL), CHECK);
576 }
577
578 void java_lang_Class::initialize_mirror_fields(KlassHandle k,
579 Handle mirror,
580 Handle protection_domain,
581 TRAPS) {
582 // Allocate a simple java object for a lock.
583 // This needs to be a java object because during class initialization
584 // it can be held across a java call.
585 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
586 set_init_lock(mirror(), r);
587
588 // Set protection domain also
589 set_protection_domain(mirror(), protection_domain());
590
591 // Initialize static fields
592 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK);
593 }
594
595 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader,
596 Handle protection_domain, TRAPS) {
597 assert(k->java_mirror() == NULL, "should only assign mirror once");
598 // Use this moment of initialization to cache modifier_flags also,
599 // to support Class.getModifiers(). Instance classes recalculate
600 // the cached flags after the class file is parsed, but before the
601 // class is put into the system dictionary.
602 int computed_modifiers = k->compute_modifier_flags(CHECK);
603 k->set_modifier_flags(computed_modifiers);
604 // Class_klass has to be loaded because it is used to allocate
605 // the mirror.
606 if (SystemDictionary::Class_klass_loaded()) {
607 // Allocate mirror (java.lang.Class instance)
608 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
609
610 // Setup indirection from mirror->klass
611 if (!k.is_null()) {
612 java_lang_Class::set_klass(mirror(), k());
613 }
614
615 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
616 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
617
618 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
619
620 // It might also have a component mirror. This mirror must already exist.
621 if (k->oop_is_array()) {
622 Handle comp_mirror;
623 if (k->oop_is_typeArray()) {
624 BasicType type = TypeArrayKlass::cast(k())->element_type();
625 comp_mirror = Universe::java_mirror(type);
626 } else {
627 assert(k->oop_is_objArray(), "Must be");
628 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass();
629 assert(element_klass != NULL, "Must have an element klass");
630 comp_mirror = element_klass->java_mirror();
631 }
632 assert(comp_mirror.not_null(), "must have a mirror");
633
634 // Two-way link between the array klass and its component mirror:
635 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
636 set_component_mirror(mirror(), comp_mirror());
637 set_array_klass(comp_mirror(), k());
638 } else {
639 assert(k->oop_is_instance(), "Must be");
640
641 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
642 if (HAS_PENDING_EXCEPTION) {
643 // If any of the fields throws an exception like OOM remove the klass field
644 // from the mirror so GC doesn't follow it after the klass has been deallocated.
645 // This mirror looks like a primitive type, which logically it is because it
646 // it represents no class.
647 java_lang_Class::set_klass(mirror(), NULL);
648 return;
649 }
650 }
651
652 // set the classLoader field in the java_lang_Class instance
653 assert(class_loader() == k->class_loader(), "should be same");
654 set_class_loader(mirror(), class_loader());
655
656 // Setup indirection from klass->mirror last
657 // after any exceptions can happen during allocations.
658 if (!k.is_null()) {
659 k->set_java_mirror(mirror());
660 }
661 } else {
662 if (fixup_mirror_list() == NULL) {
663 GrowableArray<Klass*>* list =
664 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
665 set_fixup_mirror_list(list);
666 }
667 fixup_mirror_list()->push(k());
668 }
669 }
670
671
672 int java_lang_Class::oop_size(oop java_class) {
673 assert(_oop_size_offset != 0, "must be set");
674 return java_class->int_field(_oop_size_offset);
675 }
676 void java_lang_Class::set_oop_size(oop java_class, int size) {
677 assert(_oop_size_offset != 0, "must be set");
678 java_class->int_field_put(_oop_size_offset, size);
679 }
680 int java_lang_Class::static_oop_field_count(oop java_class) {
681 assert(_static_oop_field_count_offset != 0, "must be set");
682 return java_class->int_field(_static_oop_field_count_offset);
683 }
684 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
685 assert(_static_oop_field_count_offset != 0, "must be set");
686 java_class->int_field_put(_static_oop_field_count_offset, size);
687 }
688
689 oop java_lang_Class::protection_domain(oop java_class) {
690 assert(_protection_domain_offset != 0, "must be set");
691 return java_class->obj_field(_protection_domain_offset);
692 }
693 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
694 assert(_protection_domain_offset != 0, "must be set");
695 java_class->obj_field_put(_protection_domain_offset, pd);
696 }
697
698 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
699 assert(_component_mirror_offset != 0, "must be set");
700 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
701 }
702 oop java_lang_Class::component_mirror(oop java_class) {
703 assert(_component_mirror_offset != 0, "must be set");
704 return java_class->obj_field(_component_mirror_offset);
705 }
706
707 oop java_lang_Class::init_lock(oop java_class) {
708 assert(_init_lock_offset != 0, "must be set");
709 return java_class->obj_field(_init_lock_offset);
710 }
711 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
712 assert(_init_lock_offset != 0, "must be set");
713 java_class->obj_field_put(_init_lock_offset, init_lock);
714 }
715
716 objArrayOop java_lang_Class::signers(oop java_class) {
717 assert(_signers_offset != 0, "must be set");
718 return (objArrayOop)java_class->obj_field(_signers_offset);
719 }
720 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
721 assert(_signers_offset != 0, "must be set");
722 java_class->obj_field_put(_signers_offset, (oop)signers);
723 }
724
725
726 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
727 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
728 if (_class_loader_offset != 0) {
729 java_class->obj_field_put(_class_loader_offset, loader);
730 }
731 }
732
733 oop java_lang_Class::class_loader(oop java_class) {
734 assert(_class_loader_offset != 0, "must be set");
735 return java_class->obj_field(_class_loader_offset);
736 }
737
738 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
739 // This should be improved by adding a field at the Java level or by
740 // introducing a new VM klass (see comment in ClassFileParser)
741 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
742 if (type != T_VOID) {
743 Klass* aklass = Universe::typeArrayKlassObj(type);
744 assert(aklass != NULL, "correct bootstrap");
745 set_array_klass(java_class, aklass);
746 }
747 #ifdef ASSERT
748 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
749 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
750 #endif
751 return java_class;
752 }
753
754
755 Klass* java_lang_Class::as_Klass(oop java_class) {
756 //%note memory_2
757 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
758 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
759 assert(k == NULL || k->is_klass(), "type check");
760 return k;
761 }
762
763
764 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
765 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
766 java_class->metadata_field_put(_klass_offset, klass);
767 }
768
769
770 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
771 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
772 Symbol* name = NULL;
773 bool is_instance = false;
774 if (is_primitive(java_class)) {
775 name = vmSymbols::type_signature(primitive_type(java_class));
776 } else {
777 Klass* k = as_Klass(java_class);
778 is_instance = k->oop_is_instance();
779 name = k->name();
780 }
781 if (name == NULL) {
782 st->print("<null>");
783 return;
784 }
785 if (is_instance) st->print("L");
786 st->write((char*) name->base(), (int) name->utf8_length());
787 if (is_instance) st->print(";");
788 }
789
790 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
791 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
792 Symbol* name;
793 if (is_primitive(java_class)) {
794 name = vmSymbols::type_signature(primitive_type(java_class));
795 // Because this can create a new symbol, the caller has to decrement
796 // the refcount, so make adjustment here and below for symbols returned
797 // that are not created or incremented due to a successful lookup.
798 name->increment_refcount();
799 } else {
800 Klass* k = as_Klass(java_class);
801 if (!k->oop_is_instance()) {
802 name = k->name();
803 name->increment_refcount();
804 } else {
805 ResourceMark rm;
806 const char* sigstr = k->signature_name();
807 int siglen = (int) strlen(sigstr);
808 if (!intern_if_not_found) {
809 name = SymbolTable::probe(sigstr, siglen);
810 } else {
811 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
812 }
813 }
814 }
815 return name;
816 }
817
818 // Returns the Java name for this Java mirror (Resource allocated)
819 // See Klass::external_name().
820 // For primitive type Java mirrors, its type name is returned.
821 const char* java_lang_Class::as_external_name(oop java_class) {
822 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
823 const char* name = NULL;
824 if (is_primitive(java_class)) {
825 name = type2name(primitive_type(java_class));
826 } else {
827 name = as_Klass(java_class)->external_name();
828 }
829 if (name == NULL) {
830 name = "<null>";
831 }
832 return name;
833 }
834
835 Klass* java_lang_Class::array_klass(oop java_class) {
836 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
837 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass");
838 return k;
839 }
840
841
842 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
843 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass");
844 java_class->metadata_field_put(_array_klass_offset, klass);
845 }
846
847
848 bool java_lang_Class::is_primitive(oop java_class) {
849 // should assert:
850 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
851 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
852
853 #ifdef ASSERT
854 if (is_primitive) {
855 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
856 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
857 "Should be either the T_VOID primitive or a java primitive");
858 }
859 #endif
860
861 return is_primitive;
862 }
863
864
865 BasicType java_lang_Class::primitive_type(oop java_class) {
866 assert(java_lang_Class::is_primitive(java_class), "just checking");
867 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
868 BasicType type = T_VOID;
869 if (ak != NULL) {
870 // Note: create_basic_type_mirror above initializes ak to a non-null value.
871 type = ArrayKlass::cast(ak)->element_type();
872 } else {
873 assert(oopDesc::bs()->write_barrier(java_class) == oopDesc::bs()->write_barrier(Universe::void_mirror()), "only valid non-array primitive");
874 }
875 assert(oopDesc::bs()->write_barrier(Universe::java_mirror(type)) == oopDesc::bs()->write_barrier(java_class), "must be consistent");
876 return type;
877 }
878
879 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
880 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
881 if (is_primitive(java_class)) {
882 if (reference_klass != NULL)
883 (*reference_klass) = NULL;
884 return primitive_type(java_class);
885 } else {
886 if (reference_klass != NULL)
887 (*reference_klass) = as_Klass(java_class);
888 return T_OBJECT;
889 }
890 }
891
892
893 oop java_lang_Class::primitive_mirror(BasicType t) {
894 oop mirror = Universe::java_mirror(t);
895 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
896 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
897 return mirror;
898 }
899
900 bool java_lang_Class::offsets_computed = false;
901 int java_lang_Class::classRedefinedCount_offset = -1;
902
903 void java_lang_Class::compute_offsets() {
904 assert(!offsets_computed, "offsets should be initialized only once");
905 offsets_computed = true;
906
907 Klass* k = SystemDictionary::Class_klass();
908 // The classRedefinedCount field is only present starting in 1.5,
909 // so don't go fatal.
910 compute_optional_offset(classRedefinedCount_offset,
911 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
912
913 // Needs to be optional because the old build runs Queens during bootstrapping
914 // and jdk8-9 doesn't have coordinated pushes yet.
915 compute_optional_offset(_class_loader_offset,
916 k, vmSymbols::classLoader_name(),
917 vmSymbols::classloader_signature());
918
919 compute_offset(_component_mirror_offset,
920 k, vmSymbols::componentType_name(),
921 vmSymbols::class_signature());
922
923 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
924 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
925 // GC treats them the same.
926 _init_lock_offset = _component_mirror_offset;
927
928 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
929 }
930
931 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
932 if (classRedefinedCount_offset == -1) {
933 // If we don't have an offset for it then just return -1 as a marker.
934 return -1;
935 }
936
937 return the_class_mirror->int_field(classRedefinedCount_offset);
938 }
939
940 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
941 if (classRedefinedCount_offset == -1) {
942 // If we don't have an offset for it then nothing to set.
943 return;
944 }
945
946 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
947 }
948
949
950 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
951 // platform thread structure, and a eetop offset which was used for thread
952 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
953 // merged, so in the HotSpot VM we just use the eetop field for the thread
954 // instead of the privateInfo_offset.
955 //
956 // Note: The stackSize field is only present starting in 1.4.
957
958 int java_lang_Thread::_name_offset = 0;
959 int java_lang_Thread::_group_offset = 0;
960 int java_lang_Thread::_contextClassLoader_offset = 0;
961 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
962 int java_lang_Thread::_priority_offset = 0;
963 int java_lang_Thread::_eetop_offset = 0;
964 int java_lang_Thread::_daemon_offset = 0;
965 int java_lang_Thread::_stillborn_offset = 0;
966 int java_lang_Thread::_stackSize_offset = 0;
967 int java_lang_Thread::_tid_offset = 0;
968 int java_lang_Thread::_thread_status_offset = 0;
969 int java_lang_Thread::_park_blocker_offset = 0;
970 int java_lang_Thread::_park_event_offset = 0 ;
971
972
973 void java_lang_Thread::compute_offsets() {
974 assert(_group_offset == 0, "offsets should be initialized only once");
975
976 Klass* k = SystemDictionary::Thread_klass();
977 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
978 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
979 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
980 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
981 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
982 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
983 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
984 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
985 // The stackSize field is only present starting in 1.4, so don't go fatal.
986 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
987 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
988 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
989 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
990 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
991 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
992 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
993 vmSymbols::long_signature());
994 }
995
996
997 JavaThread* java_lang_Thread::thread(oop java_thread) {
998 return (JavaThread*)java_thread->address_field(_eetop_offset);
999 }
1000
1001
1002 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1003 java_thread->address_field_put(_eetop_offset, (address)thread);
1004 }
1005
1006
1007 oop java_lang_Thread::name(oop java_thread) {
1008 return java_thread->obj_field(_name_offset);
1009 }
1010
1011
1012 void java_lang_Thread::set_name(oop java_thread, oop name) {
1013 java_thread->obj_field_put(_name_offset, name);
1014 }
1015
1016
1017 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1018 return (ThreadPriority)java_thread->int_field(_priority_offset);
1019 }
1020
1021
1022 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1023 java_thread->int_field_put(_priority_offset, priority);
1024 }
1025
1026
1027 oop java_lang_Thread::threadGroup(oop java_thread) {
1028 return java_thread->obj_field(_group_offset);
1029 }
1030
1031
1032 bool java_lang_Thread::is_stillborn(oop java_thread) {
1033 return java_thread->bool_field(_stillborn_offset) != 0;
1034 }
1035
1036
1037 // We never have reason to turn the stillborn bit off
1038 void java_lang_Thread::set_stillborn(oop java_thread) {
1039 java_thread->bool_field_put(_stillborn_offset, true);
1040 }
1041
1042
1043 bool java_lang_Thread::is_alive(oop java_thread) {
1044 JavaThread* thr = java_lang_Thread::thread(java_thread);
1045 return (thr != NULL);
1046 }
1047
1048
1049 bool java_lang_Thread::is_daemon(oop java_thread) {
1050 return java_thread->bool_field(_daemon_offset) != 0;
1051 }
1052
1053
1054 void java_lang_Thread::set_daemon(oop java_thread) {
1055 java_thread->bool_field_put(_daemon_offset, true);
1056 }
1057
1058 oop java_lang_Thread::context_class_loader(oop java_thread) {
1059 return java_thread->obj_field(_contextClassLoader_offset);
1060 }
1061
1062 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1063 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1064 }
1065
1066
1067 jlong java_lang_Thread::stackSize(oop java_thread) {
1068 if (_stackSize_offset > 0) {
1069 return java_thread->long_field(_stackSize_offset);
1070 } else {
1071 return 0;
1072 }
1073 }
1074
1075 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1076 void java_lang_Thread::set_thread_status(oop java_thread,
1077 java_lang_Thread::ThreadStatus status) {
1078 // The threadStatus is only present starting in 1.5
1079 if (_thread_status_offset > 0) {
1080 java_thread->int_field_put(_thread_status_offset, status);
1081 }
1082 }
1083
1084 // Read thread status value from threadStatus field in java.lang.Thread java class.
1085 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1086 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() ||
1087 JavaThread::current()->thread_state() == _thread_in_vm,
1088 "Java Thread is not running in vm");
1089 // The threadStatus is only present starting in 1.5
1090 if (_thread_status_offset > 0) {
1091 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1092 } else {
1093 // All we can easily figure out is if it is alive, but that is
1094 // enough info for a valid unknown status.
1095 // These aren't restricted to valid set ThreadStatus values, so
1096 // use JVMTI values and cast.
1097 JavaThread* thr = java_lang_Thread::thread(java_thread);
1098 if (thr == NULL) {
1099 // the thread hasn't run yet or is in the process of exiting
1100 return NEW;
1101 }
1102 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1103 }
1104 }
1105
1106
1107 jlong java_lang_Thread::thread_id(oop java_thread) {
1108 // The thread ID field is only present starting in 1.5
1109 if (_tid_offset > 0) {
1110 return java_thread->long_field(_tid_offset);
1111 } else {
1112 return 0;
1113 }
1114 }
1115
1116 oop java_lang_Thread::park_blocker(oop java_thread) {
1117 assert(JDK_Version::current().supports_thread_park_blocker() &&
1118 _park_blocker_offset != 0, "Must support parkBlocker field");
1119
1120 if (_park_blocker_offset > 0) {
1121 return java_thread->obj_field(_park_blocker_offset);
1122 }
1123
1124 return NULL;
1125 }
1126
1127 jlong java_lang_Thread::park_event(oop java_thread) {
1128 if (_park_event_offset > 0) {
1129 return java_thread->long_field(_park_event_offset);
1130 }
1131 return 0;
1132 }
1133
1134 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1135 if (_park_event_offset > 0) {
1136 java_thread->long_field_put(_park_event_offset, ptr);
1137 return true;
1138 }
1139 return false;
1140 }
1141
1142
1143 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1144 assert(_thread_status_offset != 0, "Must have thread status");
1145 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1146 switch (status) {
1147 case NEW : return "NEW";
1148 case RUNNABLE : return "RUNNABLE";
1149 case SLEEPING : return "TIMED_WAITING (sleeping)";
1150 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1151 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1152 case PARKED : return "WAITING (parking)";
1153 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1154 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1155 case TERMINATED : return "TERMINATED";
1156 default : return "UNKNOWN";
1157 };
1158 }
1159 int java_lang_ThreadGroup::_parent_offset = 0;
1160 int java_lang_ThreadGroup::_name_offset = 0;
1161 int java_lang_ThreadGroup::_threads_offset = 0;
1162 int java_lang_ThreadGroup::_groups_offset = 0;
1163 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1164 int java_lang_ThreadGroup::_destroyed_offset = 0;
1165 int java_lang_ThreadGroup::_daemon_offset = 0;
1166 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
1167 int java_lang_ThreadGroup::_nthreads_offset = 0;
1168 int java_lang_ThreadGroup::_ngroups_offset = 0;
1169
1170 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1171 assert(java_thread_group->is_oop(), "thread group must be oop");
1172 return java_thread_group->obj_field(_parent_offset);
1173 }
1174
1175 // ("name as oop" accessor is not necessary)
1176
1177 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
1178 oop name = java_thread_group->obj_field(_name_offset);
1179 // ThreadGroup.name can be null
1180 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
1181 }
1182
1183 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1184 assert(java_thread_group->is_oop(), "thread group must be oop");
1185 return java_thread_group->int_field(_nthreads_offset);
1186 }
1187
1188 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1189 oop threads = java_thread_group->obj_field(_threads_offset);
1190 assert(threads != NULL, "threadgroups should have threads");
1191 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1192 return objArrayOop(threads);
1193 }
1194
1195 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1196 assert(java_thread_group->is_oop(), "thread group must be oop");
1197 return java_thread_group->int_field(_ngroups_offset);
1198 }
1199
1200 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1201 oop groups = java_thread_group->obj_field(_groups_offset);
1202 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1203 return objArrayOop(groups);
1204 }
1205
1206 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1207 assert(java_thread_group->is_oop(), "thread group must be oop");
1208 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1209 }
1210
1211 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1212 assert(java_thread_group->is_oop(), "thread group must be oop");
1213 return java_thread_group->bool_field(_destroyed_offset) != 0;
1214 }
1215
1216 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1217 assert(java_thread_group->is_oop(), "thread group must be oop");
1218 return java_thread_group->bool_field(_daemon_offset) != 0;
1219 }
1220
1221 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1222 assert(java_thread_group->is_oop(), "thread group must be oop");
1223 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1224 }
1225
1226 void java_lang_ThreadGroup::compute_offsets() {
1227 assert(_parent_offset == 0, "offsets should be initialized only once");
1228
1229 Klass* k = SystemDictionary::ThreadGroup_klass();
1230
1231 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1232 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1233 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1234 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1235 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1236 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1237 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1238 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1239 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1240 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1241 }
1242
1243 oop java_lang_Throwable::unassigned_stacktrace() {
1244 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass());
1245 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1246 if (UseCompressedOops) {
1247 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1248 } else {
1249 return oopDesc::load_decode_heap_oop((oop*)addr);
1250 }
1251 }
1252
1253 oop java_lang_Throwable::backtrace(oop throwable) {
1254 return throwable->obj_field_acquire(backtrace_offset);
1255 }
1256
1257
1258 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1259 throwable->release_obj_field_put(backtrace_offset, value);
1260 }
1261
1262
1263 oop java_lang_Throwable::message(oop throwable) {
1264 return throwable->obj_field(detailMessage_offset);
1265 }
1266
1267
1268 oop java_lang_Throwable::message(Handle throwable) {
1269 return throwable->obj_field(detailMessage_offset);
1270 }
1271
1272
1273 // Return Symbol for detailed_message or NULL
1274 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1275 PRESERVE_EXCEPTION_MARK; // Keep original exception
1276 oop detailed_message = java_lang_Throwable::message(throwable);
1277 if (detailed_message != NULL) {
1278 return java_lang_String::as_symbol(detailed_message, THREAD);
1279 }
1280 return NULL;
1281 }
1282
1283 void java_lang_Throwable::set_message(oop throwable, oop value) {
1284 throwable->obj_field_put(detailMessage_offset, value);
1285 }
1286
1287
1288 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1289 throwable->obj_field_put(stackTrace_offset, st_element_array);
1290 }
1291
1292 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1293 set_stacktrace(throwable, NULL);
1294 }
1295
1296
1297 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1298 ResourceMark rm;
1299 Klass* k = throwable->klass();
1300 assert(k != NULL, "just checking");
1301 st->print("%s", InstanceKlass::cast(k)->external_name());
1302 oop msg = message(throwable);
1303 if (msg != NULL) {
1304 st->print(": %s", java_lang_String::as_utf8_string(msg));
1305 }
1306 }
1307
1308
1309 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1310 ResourceMark rm;
1311 Klass* k = throwable->klass();
1312 assert(k != NULL, "just checking");
1313 st->print("%s", InstanceKlass::cast(k)->external_name());
1314 oop msg = message(throwable);
1315 if (msg != NULL) {
1316 st->print(": %s", java_lang_String::as_utf8_string(msg));
1317 }
1318 }
1319
1320 // After this many redefines, the stack trace is unreliable.
1321 const int MAX_VERSION = USHRT_MAX;
1322
1323 // Helper backtrace functions to store bci|version together.
1324 static inline int merge_bci_and_version(int bci, int version) {
1325 // only store u2 for version, checking for overflow.
1326 if (version > USHRT_MAX || version < 0) version = MAX_VERSION;
1327 assert((jushort)bci == bci, "bci should be short");
1328 return build_int_from_shorts(version, bci);
1329 }
1330
1331 static inline int bci_at(unsigned int merged) {
1332 return extract_high_short_from_int(merged);
1333 }
1334 static inline int version_at(unsigned int merged) {
1335 return extract_low_short_from_int(merged);
1336 }
1337
1338 static inline bool version_matches(Method* method, int version) {
1339 assert(version < MAX_VERSION, "version is too big");
1340 return method != NULL && (method->constants()->version() == version);
1341 }
1342
1343 static inline int get_line_number(Method* method, int bci) {
1344 int line_number = 0;
1345 if (method->is_native()) {
1346 // Negative value different from -1 below, enabling Java code in
1347 // class java.lang.StackTraceElement to distinguish "native" from
1348 // "no LineNumberTable". JDK tests for -2.
1349 line_number = -2;
1350 } else {
1351 // Returns -1 if no LineNumberTable, and otherwise actual line number
1352 line_number = method->line_number_from_bci(bci);
1353 if (line_number == -1 && ShowHiddenFrames) {
1354 line_number = bci + 1000000;
1355 }
1356 }
1357 return line_number;
1358 }
1359
1360 // This class provides a simple wrapper over the internal structure of
1361 // exception backtrace to insulate users of the backtrace from needing
1362 // to know what it looks like.
1363 class BacktraceBuilder: public StackObj {
1364 private:
1365 Handle _backtrace;
1366 objArrayOop _head;
1367 typeArrayOop _methods;
1368 typeArrayOop _bcis;
1369 objArrayOop _mirrors;
1370 typeArrayOop _cprefs; // needed to insulate method name against redefinition
1371 int _index;
1372 No_Safepoint_Verifier _nsv;
1373
1374 public:
1375
1376 enum {
1377 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1378 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1379 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1380 trace_cprefs_offset = java_lang_Throwable::trace_cprefs_offset,
1381 trace_next_offset = java_lang_Throwable::trace_next_offset,
1382 trace_size = java_lang_Throwable::trace_size,
1383 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1384 };
1385
1386 // get info out of chunks
1387 static typeArrayOop get_methods(objArrayHandle chunk) {
1388 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1389 assert(methods != NULL, "method array should be initialized in backtrace");
1390 return methods;
1391 }
1392 static typeArrayOop get_bcis(objArrayHandle chunk) {
1393 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1394 assert(bcis != NULL, "bci array should be initialized in backtrace");
1395 return bcis;
1396 }
1397 static objArrayOop get_mirrors(objArrayHandle chunk) {
1398 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1399 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1400 return mirrors;
1401 }
1402 static typeArrayOop get_cprefs(objArrayHandle chunk) {
1403 typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset));
1404 assert(cprefs != NULL, "cprefs array should be initialized in backtrace");
1405 return cprefs;
1406 }
1407
1408 // constructor for new backtrace
1409 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) {
1410 expand(CHECK);
1411 _backtrace = _head;
1412 _index = 0;
1413 }
1414
1415 BacktraceBuilder(objArrayHandle backtrace) {
1416 _methods = get_methods(backtrace);
1417 _bcis = get_bcis(backtrace);
1418 _mirrors = get_mirrors(backtrace);
1419 _cprefs = get_cprefs(backtrace);
1420 assert(_methods->length() == _bcis->length() &&
1421 _methods->length() == _mirrors->length(),
1422 "method and source information arrays should match");
1423
1424 // head is the preallocated backtrace
1425 _backtrace = _head = backtrace();
1426 _index = 0;
1427 }
1428
1429 void expand(TRAPS) {
1430 objArrayHandle old_head(THREAD, _head);
1431 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1432
1433 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1434 objArrayHandle new_head(THREAD, head);
1435
1436 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1437 typeArrayHandle new_methods(THREAD, methods);
1438
1439 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1440 typeArrayHandle new_bcis(THREAD, bcis);
1441
1442 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1443 objArrayHandle new_mirrors(THREAD, mirrors);
1444
1445 typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1446 typeArrayHandle new_cprefs(THREAD, cprefs);
1447
1448 if (!old_head.is_null()) {
1449 old_head->obj_at_put(trace_next_offset, new_head());
1450 }
1451 new_head->obj_at_put(trace_methods_offset, new_methods());
1452 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1453 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1454 new_head->obj_at_put(trace_cprefs_offset, new_cprefs());
1455
1456 _head = new_head();
1457 _methods = new_methods();
1458 _bcis = new_bcis();
1459 _mirrors = new_mirrors();
1460 _cprefs = new_cprefs();
1461 _index = 0;
1462 }
1463
1464 oop backtrace() {
1465 return _backtrace();
1466 }
1467
1468 inline void push(Method* method, int bci, TRAPS) {
1469 // Smear the -1 bci to 0 since the array only holds unsigned
1470 // shorts. The later line number lookup would just smear the -1
1471 // to a 0 even if it could be recorded.
1472 if (bci == SynchronizationEntryBCI) bci = 0;
1473
1474 if (_index >= trace_chunk_size) {
1475 methodHandle mhandle(THREAD, method);
1476 expand(CHECK);
1477 method = mhandle();
1478 }
1479
1480 _methods->short_at_put(_index, method->orig_method_idnum());
1481 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version()));
1482 _cprefs->short_at_put(_index, method->name_index());
1483
1484 // We need to save the mirrors in the backtrace to keep the class
1485 // from being unloaded while we still have this stack trace.
1486 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1487 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1488 _index++;
1489 }
1490
1491 };
1492
1493 Symbol* get_source_file_name(InstanceKlass* holder, int version) {
1494 // Find the specific ik version that contains this source_file_name_index
1495 // via the previous versions list, but use the current version's
1496 // constant pool to look it up. The previous version's index has been
1497 // merged for the current constant pool.
1498 InstanceKlass* ik = holder->get_klass_version(version);
1499 // This version has been cleaned up.
1500 if (ik == NULL) return NULL;
1501 int source_file_name_index = ik->source_file_name_index();
1502 return (source_file_name_index == 0) ?
1503 (Symbol*)NULL : holder->constants()->symbol_at(source_file_name_index);
1504 }
1505
1506 // Print stack trace element to resource allocated buffer
1507 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
1508 int method_id, int version, int bci, int cpref) {
1509
1510 // Get strings and string lengths
1511 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1512 const char* klass_name = holder->external_name();
1513 int buf_len = (int)strlen(klass_name);
1514
1515 Method* method = holder->method_with_orig_idnum(method_id, version);
1516
1517 // The method can be NULL if the requested class version is gone
1518 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1519 char* method_name = sym->as_C_string();
1520 buf_len += (int)strlen(method_name);
1521
1522 char* source_file_name = NULL;
1523 Symbol* source = get_source_file_name(holder, version);
1524 if (source != NULL) {
1525 source_file_name = source->as_C_string();
1526 buf_len += (int)strlen(source_file_name);
1527 }
1528
1529 // Allocate temporary buffer with extra space for formatting and line number
1530 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1531
1532 // Print stack trace line in buffer
1533 sprintf(buf, "\tat %s.%s", klass_name, method_name);
1534
1535 if (!version_matches(method, version)) {
1536 strcat(buf, "(Redefined)");
1537 } else {
1538 int line_number = get_line_number(method, bci);
1539 if (line_number == -2) {
1540 strcat(buf, "(Native Method)");
1541 } else {
1542 if (source_file_name != NULL && (line_number != -1)) {
1543 // Sourcename and linenumber
1544 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1545 } else if (source_file_name != NULL) {
1546 // Just sourcename
1547 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1548 } else {
1549 // Neither sourcename nor linenumber
1550 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1551 }
1552 nmethod* nm = method->code();
1553 if (WizardMode && nm != NULL) {
1554 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1555 }
1556 }
1557 }
1558
1559 return buf;
1560 }
1561
1562 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror,
1563 int method_id, int version, int bci, int cpref) {
1564 ResourceMark rm;
1565 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci, cpref);
1566 st->print_cr("%s", buf);
1567 }
1568
1569 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) {
1570 Handle mirror = method->method_holder()->java_mirror();
1571 int method_id = method->orig_method_idnum();
1572 int version = method->constants()->version();
1573 int cpref = method->name_index();
1574 print_stack_element(st, mirror, method_id, version, bci, cpref);
1575 }
1576
1577 const char* java_lang_Throwable::no_stack_trace_message() {
1578 return "\t<<no stack trace available>>";
1579 }
1580
1581
1582 // Currently used only for exceptions occurring during startup
1583 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1584 Thread *THREAD = Thread::current();
1585 Handle h_throwable(THREAD, throwable);
1586 while (h_throwable.not_null()) {
1587 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1588 if (result.is_null()) {
1589 st->print_cr("%s", no_stack_trace_message());
1590 return;
1591 }
1592
1593 while (result.not_null()) {
1594
1595 // Get method id, bci, version and mirror from chunk
1596 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result));
1597 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result));
1598 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result));
1599 typeArrayHandle cprefs (THREAD, BacktraceBuilder::get_cprefs(result));
1600
1601 int length = methods()->length();
1602 for (int index = 0; index < length; index++) {
1603 Handle mirror(THREAD, mirrors->obj_at(index));
1604 // NULL mirror means end of stack trace
1605 if (mirror.is_null()) goto handle_cause;
1606 int method = methods->short_at(index);
1607 int version = version_at(bcis->int_at(index));
1608 int bci = bci_at(bcis->int_at(index));
1609 int cpref = cprefs->short_at(index);
1610 print_stack_element(st, mirror, method, version, bci, cpref);
1611 }
1612 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1613 }
1614 handle_cause:
1615 {
1616 EXCEPTION_MARK;
1617 JavaValue cause(T_OBJECT);
1618 JavaCalls::call_virtual(&cause,
1619 h_throwable,
1620 KlassHandle(THREAD, h_throwable->klass()),
1621 vmSymbols::getCause_name(),
1622 vmSymbols::void_throwable_signature(),
1623 THREAD);
1624 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1625 if (HAS_PENDING_EXCEPTION) {
1626 CLEAR_PENDING_EXCEPTION;
1627 h_throwable = Handle();
1628 } else {
1629 h_throwable = Handle(THREAD, (oop) cause.get_jobject());
1630 if (h_throwable.not_null()) {
1631 st->print("Caused by: ");
1632 print(h_throwable, st);
1633 st->cr();
1634 }
1635 }
1636 }
1637 }
1638 }
1639
1640 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) {
1641 if (!StackTraceInThrowable) return;
1642 ResourceMark rm(THREAD);
1643
1644 // Start out by clearing the backtrace for this object, in case the VM
1645 // runs out of memory while allocating the stack trace
1646 set_backtrace(throwable(), NULL);
1647 // Clear lazily constructed Java level stacktrace if refilling occurs
1648 // This is unnecessary in 1.7+ but harmless
1649 clear_stacktrace(throwable());
1650
1651 int max_depth = MaxJavaStackTraceDepth;
1652 JavaThread* thread = (JavaThread*)THREAD;
1653 BacktraceBuilder bt(CHECK);
1654
1655 // If there is no Java frame just return the method that was being called
1656 // with bci 0
1657 if (!thread->has_last_Java_frame()) {
1658 if (max_depth >= 1 && method() != NULL) {
1659 bt.push(method(), 0, CHECK);
1660 set_backtrace(throwable(), bt.backtrace());
1661 }
1662 return;
1663 }
1664
1665 // Instead of using vframe directly, this version of fill_in_stack_trace
1666 // basically handles everything by hand. This significantly improved the
1667 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1668 // See bug 6333838 for more details.
1669 // The "ASSERT" here is to verify this method generates the exactly same stack
1670 // trace as utilizing vframe.
1671 #ifdef ASSERT
1672 vframeStream st(thread);
1673 methodHandle st_method(THREAD, st.method());
1674 #endif
1675 int total_count = 0;
1676 RegisterMap map(thread, false);
1677 int decode_offset = 0;
1678 nmethod* nm = NULL;
1679 bool skip_fillInStackTrace_check = false;
1680 bool skip_throwableInit_check = false;
1681 bool skip_hidden = !ShowHiddenFrames;
1682
1683 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1684 Method* method = NULL;
1685 int bci = 0;
1686
1687 // Compiled java method case.
1688 if (decode_offset != 0) {
1689 DebugInfoReadStream stream(nm, decode_offset);
1690 decode_offset = stream.read_int();
1691 method = (Method*)nm->metadata_at(stream.read_int());
1692 bci = stream.read_bci();
1693 } else {
1694 if (fr.is_first_frame()) break;
1695 address pc = fr.pc();
1696 if (fr.is_interpreted_frame()) {
1697 address bcp = fr.interpreter_frame_bcp();
1698 method = fr.interpreter_frame_method();
1699 bci = method->bci_from(bcp);
1700 fr = fr.sender(&map);
1701 } else {
1702 CodeBlob* cb = fr.cb();
1703 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1704 // but non nmethod
1705 fr = fr.sender(&map);
1706 if (cb == NULL || !cb->is_nmethod()) {
1707 continue;
1708 }
1709 nm = (nmethod*)cb;
1710 if (nm->method()->is_native()) {
1711 method = nm->method();
1712 bci = 0;
1713 } else {
1714 PcDesc* pd = nm->pc_desc_at(pc);
1715 decode_offset = pd->scope_decode_offset();
1716 // if decode_offset is not equal to 0, it will execute the
1717 // "compiled java method case" at the beginning of the loop.
1718 continue;
1719 }
1720 }
1721 }
1722 #ifdef ASSERT
1723 assert(st_method() == method && st.bci() == bci,
1724 "Wrong stack trace");
1725 st.next();
1726 // vframeStream::method isn't GC-safe so store off a copy
1727 // of the Method* in case we GC.
1728 if (!st.at_end()) {
1729 st_method = st.method();
1730 }
1731 #endif
1732
1733 // the format of the stacktrace will be:
1734 // - 1 or more fillInStackTrace frames for the exception class (skipped)
1735 // - 0 or more <init> methods for the exception class (skipped)
1736 // - rest of the stack
1737
1738 if (!skip_fillInStackTrace_check) {
1739 if (method->name() == vmSymbols::fillInStackTrace_name() &&
1740 throwable->is_a(method->method_holder())) {
1741 continue;
1742 }
1743 else {
1744 skip_fillInStackTrace_check = true; // gone past them all
1745 }
1746 }
1747 if (!skip_throwableInit_check) {
1748 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1749
1750 // skip <init> methods of the exception class and superclasses
1751 // This is simlar to classic VM.
1752 if (method->name() == vmSymbols::object_initializer_name() &&
1753 throwable->is_a(method->method_holder())) {
1754 continue;
1755 } else {
1756 // there are none or we've seen them all - either way stop checking
1757 skip_throwableInit_check = true;
1758 }
1759 }
1760 if (method->is_hidden()) {
1761 if (skip_hidden) continue;
1762 }
1763 bt.push(method, bci, CHECK);
1764 total_count++;
1765 }
1766
1767 // Put completed stack trace into throwable object
1768 set_backtrace(throwable(), bt.backtrace());
1769 }
1770
1771 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) {
1772 // No-op if stack trace is disabled
1773 if (!StackTraceInThrowable) {
1774 return;
1775 }
1776
1777 // Disable stack traces for some preallocated out of memory errors
1778 if (!Universe::should_fill_in_stack_trace(throwable)) {
1779 return;
1780 }
1781
1782 PRESERVE_EXCEPTION_MARK;
1783
1784 JavaThread* thread = JavaThread::active();
1785 fill_in_stack_trace(throwable, method, thread);
1786 // ignore exceptions thrown during stack trace filling
1787 CLEAR_PENDING_EXCEPTION;
1788 }
1789
1790 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1791 // Allocate stack trace - backtrace is created but not filled in
1792
1793 // No-op if stack trace is disabled
1794 if (!StackTraceInThrowable) return;
1795 BacktraceBuilder bt(CHECK); // creates a backtrace
1796 set_backtrace(throwable(), bt.backtrace());
1797 }
1798
1799
1800 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1801 // Fill in stack trace into preallocated backtrace (no GC)
1802
1803 // No-op if stack trace is disabled
1804 if (!StackTraceInThrowable) return;
1805
1806 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1807
1808 JavaThread* THREAD = JavaThread::current();
1809
1810 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
1811 assert(backtrace.not_null(), "backtrace should have been preallocated");
1812
1813 ResourceMark rm(THREAD);
1814 vframeStream st(THREAD);
1815
1816 BacktraceBuilder bt(backtrace);
1817
1818 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1819 // methods as preallocated errors aren't created by "java" code.
1820
1821 // fill in as much stack trace as possible
1822 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace);
1823 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1824 int chunk_count = 0;
1825
1826 for (;!st.at_end(); st.next()) {
1827 bt.push(st.method(), st.bci(), CHECK);
1828 chunk_count++;
1829
1830 // Bail-out for deep stacks
1831 if (chunk_count >= max_chunks) break;
1832 }
1833
1834 // We support the Throwable immutability protocol defined for Java 7.
1835 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
1836 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
1837 }
1838
1839
1840 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1841 if (throwable == NULL) {
1842 THROW_0(vmSymbols::java_lang_NullPointerException());
1843 }
1844 objArrayOop chunk = objArrayOop(backtrace(throwable));
1845 int depth = 0;
1846 if (chunk != NULL) {
1847 // Iterate over chunks and count full ones
1848 while (true) {
1849 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1850 if (next == NULL) break;
1851 depth += trace_chunk_size;
1852 chunk = next;
1853 }
1854 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1855 // Count element in remaining partial chunk. NULL value for mirror
1856 // marks the end of the stack trace elements that are saved.
1857 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1858 assert(mirrors != NULL, "sanity check");
1859 for (int i = 0; i < mirrors->length(); i++) {
1860 if (mirrors->obj_at(i) == NULL) break;
1861 depth++;
1862 }
1863 }
1864 return depth;
1865 }
1866
1867
1868 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1869 if (throwable == NULL) {
1870 THROW_0(vmSymbols::java_lang_NullPointerException());
1871 }
1872 if (index < 0) {
1873 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1874 }
1875 // Compute how many chunks to skip and index into actual chunk
1876 objArrayOop chunk = objArrayOop(backtrace(throwable));
1877 int skip_chunks = index / trace_chunk_size;
1878 int chunk_index = index % trace_chunk_size;
1879 while (chunk != NULL && skip_chunks > 0) {
1880 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1881 skip_chunks--;
1882 }
1883 if (chunk == NULL) {
1884 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1885 }
1886 // Get method id, bci, version, mirror and cpref from chunk
1887 typeArrayOop methods = BacktraceBuilder::get_methods(chunk);
1888 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk);
1889 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1890 typeArrayOop cprefs = BacktraceBuilder::get_cprefs(chunk);
1891
1892 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check");
1893
1894 int method = methods->short_at(chunk_index);
1895 int version = version_at(bcis->int_at(chunk_index));
1896 int bci = bci_at(bcis->int_at(chunk_index));
1897 int cpref = cprefs->short_at(chunk_index);
1898 Handle mirror(THREAD, mirrors->obj_at(chunk_index));
1899
1900 // Chunk can be partial full
1901 if (mirror.is_null()) {
1902 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1903 }
1904 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, cpref, CHECK_0);
1905 return element;
1906 }
1907
1908 oop java_lang_StackTraceElement::create(Handle mirror, int method_id,
1909 int version, int bci, int cpref, TRAPS) {
1910 // Allocate java.lang.StackTraceElement instance
1911 Klass* k = SystemDictionary::StackTraceElement_klass();
1912 assert(k != NULL, "must be loaded in 1.4+");
1913 instanceKlassHandle ik (THREAD, k);
1914 if (ik->should_be_initialized()) {
1915 ik->initialize(CHECK_0);
1916 }
1917
1918 Handle element = ik->allocate_instance_handle(CHECK_0);
1919 // Fill in class name
1920 ResourceMark rm(THREAD);
1921 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1922 const char* str = holder->external_name();
1923 oop classname = StringTable::intern((char*) str, CHECK_0);
1924 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1925
1926 Method* method = holder->method_with_orig_idnum(method_id, version);
1927
1928 // The method can be NULL if the requested class version is gone
1929 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1930
1931 // Fill in method name
1932 oop methodname = StringTable::intern(sym, CHECK_0);
1933 java_lang_StackTraceElement::set_methodName(element(), methodname);
1934
1935 if (!version_matches(method, version)) {
1936 // The method was redefined, accurate line number information isn't available
1937 java_lang_StackTraceElement::set_fileName(element(), NULL);
1938 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1939 } else {
1940 // Fill in source file name and line number.
1941 Symbol* source = get_source_file_name(holder, version);
1942 if (ShowHiddenFrames && source == NULL)
1943 source = vmSymbols::unknown_class_name();
1944 oop filename = StringTable::intern(source, CHECK_0);
1945 java_lang_StackTraceElement::set_fileName(element(), filename);
1946
1947 int line_number = get_line_number(method, bci);
1948 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1949 }
1950 return element();
1951 }
1952
1953 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1954 Handle mirror (THREAD, method->method_holder()->java_mirror());
1955 int method_id = method->orig_method_idnum();
1956 int cpref = method->name_index();
1957 return create(mirror, method_id, method->constants()->version(), bci, cpref, THREAD);
1958 }
1959
1960 void java_lang_reflect_AccessibleObject::compute_offsets() {
1961 Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
1962 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1963 }
1964
1965 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1966 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1967 return (jboolean) reflect->bool_field(override_offset);
1968 }
1969
1970 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1971 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1972 reflect->bool_field_put(override_offset, (int) value);
1973 }
1974
1975 void java_lang_reflect_Method::compute_offsets() {
1976 Klass* k = SystemDictionary::reflect_Method_klass();
1977 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1978 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1979 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1980 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1981 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1982 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1983 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1984 // The generic signature and annotations fields are only present in 1.5
1985 signature_offset = -1;
1986 annotations_offset = -1;
1987 parameter_annotations_offset = -1;
1988 annotation_default_offset = -1;
1989 type_annotations_offset = -1;
1990 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1991 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1992 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1993 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1994 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
1995 }
1996
1997 Handle java_lang_reflect_Method::create(TRAPS) {
1998 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1999 Klass* klass = SystemDictionary::reflect_Method_klass();
2000 // This class is eagerly initialized during VM initialization, since we keep a refence
2001 // to one of the methods
2002 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2003 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2004 }
2005
2006 oop java_lang_reflect_Method::clazz(oop reflect) {
2007 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2008 return reflect->obj_field(clazz_offset);
2009 }
2010
2011 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2012 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2013 reflect->obj_field_put(clazz_offset, value);
2014 }
2015
2016 int java_lang_reflect_Method::slot(oop reflect) {
2017 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2018 return reflect->int_field(slot_offset);
2019 }
2020
2021 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2022 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2023 reflect->int_field_put(slot_offset, value);
2024 }
2025
2026 oop java_lang_reflect_Method::name(oop method) {
2027 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2028 return method->obj_field(name_offset);
2029 }
2030
2031 void java_lang_reflect_Method::set_name(oop method, oop value) {
2032 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2033 method->obj_field_put(name_offset, value);
2034 }
2035
2036 oop java_lang_reflect_Method::return_type(oop method) {
2037 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2038 return method->obj_field(returnType_offset);
2039 }
2040
2041 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2042 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2043 method->obj_field_put(returnType_offset, value);
2044 }
2045
2046 oop java_lang_reflect_Method::parameter_types(oop method) {
2047 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2048 return method->obj_field(parameterTypes_offset);
2049 }
2050
2051 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2052 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2053 method->obj_field_put(parameterTypes_offset, value);
2054 }
2055
2056 oop java_lang_reflect_Method::exception_types(oop method) {
2057 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2058 return method->obj_field(exceptionTypes_offset);
2059 }
2060
2061 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2062 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2063 method->obj_field_put(exceptionTypes_offset, value);
2064 }
2065
2066 int java_lang_reflect_Method::modifiers(oop method) {
2067 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2068 return method->int_field(modifiers_offset);
2069 }
2070
2071 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2072 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2073 method->int_field_put(modifiers_offset, value);
2074 }
2075
2076 bool java_lang_reflect_Method::has_signature_field() {
2077 return (signature_offset >= 0);
2078 }
2079
2080 oop java_lang_reflect_Method::signature(oop method) {
2081 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2082 assert(has_signature_field(), "signature field must be present");
2083 return method->obj_field(signature_offset);
2084 }
2085
2086 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2087 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2088 assert(has_signature_field(), "signature field must be present");
2089 method->obj_field_put(signature_offset, value);
2090 }
2091
2092 bool java_lang_reflect_Method::has_annotations_field() {
2093 return (annotations_offset >= 0);
2094 }
2095
2096 oop java_lang_reflect_Method::annotations(oop method) {
2097 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2098 assert(has_annotations_field(), "annotations field must be present");
2099 return method->obj_field(annotations_offset);
2100 }
2101
2102 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2103 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2104 assert(has_annotations_field(), "annotations field must be present");
2105 method->obj_field_put(annotations_offset, value);
2106 }
2107
2108 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2109 return (parameter_annotations_offset >= 0);
2110 }
2111
2112 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2113 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2114 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2115 return method->obj_field(parameter_annotations_offset);
2116 }
2117
2118 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2119 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2120 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2121 method->obj_field_put(parameter_annotations_offset, value);
2122 }
2123
2124 bool java_lang_reflect_Method::has_annotation_default_field() {
2125 return (annotation_default_offset >= 0);
2126 }
2127
2128 oop java_lang_reflect_Method::annotation_default(oop method) {
2129 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2130 assert(has_annotation_default_field(), "annotation default field must be present");
2131 return method->obj_field(annotation_default_offset);
2132 }
2133
2134 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2135 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2136 assert(has_annotation_default_field(), "annotation default field must be present");
2137 method->obj_field_put(annotation_default_offset, value);
2138 }
2139
2140 bool java_lang_reflect_Method::has_type_annotations_field() {
2141 return (type_annotations_offset >= 0);
2142 }
2143
2144 oop java_lang_reflect_Method::type_annotations(oop method) {
2145 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2146 assert(has_type_annotations_field(), "type_annotations field must be present");
2147 return method->obj_field(type_annotations_offset);
2148 }
2149
2150 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2151 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2152 assert(has_type_annotations_field(), "type_annotations field must be present");
2153 method->obj_field_put(type_annotations_offset, value);
2154 }
2155
2156 void java_lang_reflect_Constructor::compute_offsets() {
2157 Klass* k = SystemDictionary::reflect_Constructor_klass();
2158 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2159 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2160 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2161 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2162 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2163 // The generic signature and annotations fields are only present in 1.5
2164 signature_offset = -1;
2165 annotations_offset = -1;
2166 parameter_annotations_offset = -1;
2167 type_annotations_offset = -1;
2168 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2169 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2170 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2171 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2172 }
2173
2174 Handle java_lang_reflect_Constructor::create(TRAPS) {
2175 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2176 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2177 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2178 instanceKlassHandle klass (THREAD, k);
2179 // Ensure it is initialized
2180 klass->initialize(CHECK_NH);
2181 return klass->allocate_instance_handle(THREAD);
2182 }
2183
2184 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2185 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2186 return reflect->obj_field(clazz_offset);
2187 }
2188
2189 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2190 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2191 reflect->obj_field_put(clazz_offset, value);
2192 }
2193
2194 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2195 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2196 return constructor->obj_field(parameterTypes_offset);
2197 }
2198
2199 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2200 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2201 constructor->obj_field_put(parameterTypes_offset, value);
2202 }
2203
2204 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2205 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2206 return constructor->obj_field(exceptionTypes_offset);
2207 }
2208
2209 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2210 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2211 constructor->obj_field_put(exceptionTypes_offset, value);
2212 }
2213
2214 int java_lang_reflect_Constructor::slot(oop reflect) {
2215 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2216 return reflect->int_field(slot_offset);
2217 }
2218
2219 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2220 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2221 reflect->int_field_put(slot_offset, value);
2222 }
2223
2224 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2225 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2226 return constructor->int_field(modifiers_offset);
2227 }
2228
2229 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2230 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2231 constructor->int_field_put(modifiers_offset, value);
2232 }
2233
2234 bool java_lang_reflect_Constructor::has_signature_field() {
2235 return (signature_offset >= 0);
2236 }
2237
2238 oop java_lang_reflect_Constructor::signature(oop constructor) {
2239 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2240 assert(has_signature_field(), "signature field must be present");
2241 return constructor->obj_field(signature_offset);
2242 }
2243
2244 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2245 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2246 assert(has_signature_field(), "signature field must be present");
2247 constructor->obj_field_put(signature_offset, value);
2248 }
2249
2250 bool java_lang_reflect_Constructor::has_annotations_field() {
2251 return (annotations_offset >= 0);
2252 }
2253
2254 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2255 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2256 assert(has_annotations_field(), "annotations field must be present");
2257 return constructor->obj_field(annotations_offset);
2258 }
2259
2260 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2261 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2262 assert(has_annotations_field(), "annotations field must be present");
2263 constructor->obj_field_put(annotations_offset, value);
2264 }
2265
2266 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2267 return (parameter_annotations_offset >= 0);
2268 }
2269
2270 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2271 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2272 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2273 return method->obj_field(parameter_annotations_offset);
2274 }
2275
2276 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2277 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2278 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2279 method->obj_field_put(parameter_annotations_offset, value);
2280 }
2281
2282 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2283 return (type_annotations_offset >= 0);
2284 }
2285
2286 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2287 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2288 assert(has_type_annotations_field(), "type_annotations field must be present");
2289 return constructor->obj_field(type_annotations_offset);
2290 }
2291
2292 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2293 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2294 assert(has_type_annotations_field(), "type_annotations field must be present");
2295 constructor->obj_field_put(type_annotations_offset, value);
2296 }
2297
2298 void java_lang_reflect_Field::compute_offsets() {
2299 Klass* k = SystemDictionary::reflect_Field_klass();
2300 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2301 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2302 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
2303 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2304 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2305 // The generic signature and annotations fields are only present in 1.5
2306 signature_offset = -1;
2307 annotations_offset = -1;
2308 type_annotations_offset = -1;
2309 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2310 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2311 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2312 }
2313
2314 Handle java_lang_reflect_Field::create(TRAPS) {
2315 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2316 Symbol* name = vmSymbols::java_lang_reflect_Field();
2317 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2318 instanceKlassHandle klass (THREAD, k);
2319 // Ensure it is initialized
2320 klass->initialize(CHECK_NH);
2321 return klass->allocate_instance_handle(THREAD);
2322 }
2323
2324 oop java_lang_reflect_Field::clazz(oop reflect) {
2325 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2326 return reflect->obj_field(clazz_offset);
2327 }
2328
2329 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2330 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2331 reflect->obj_field_put(clazz_offset, value);
2332 }
2333
2334 oop java_lang_reflect_Field::name(oop field) {
2335 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2336 return field->obj_field(name_offset);
2337 }
2338
2339 void java_lang_reflect_Field::set_name(oop field, oop value) {
2340 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2341 field->obj_field_put(name_offset, value);
2342 }
2343
2344 oop java_lang_reflect_Field::type(oop field) {
2345 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2346 return field->obj_field(type_offset);
2347 }
2348
2349 void java_lang_reflect_Field::set_type(oop field, oop value) {
2350 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2351 field->obj_field_put(type_offset, value);
2352 }
2353
2354 int java_lang_reflect_Field::slot(oop reflect) {
2355 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2356 return reflect->int_field(slot_offset);
2357 }
2358
2359 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2360 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2361 reflect->int_field_put(slot_offset, value);
2362 }
2363
2364 int java_lang_reflect_Field::modifiers(oop field) {
2365 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2366 return field->int_field(modifiers_offset);
2367 }
2368
2369 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2370 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2371 field->int_field_put(modifiers_offset, value);
2372 }
2373
2374 bool java_lang_reflect_Field::has_signature_field() {
2375 return (signature_offset >= 0);
2376 }
2377
2378 oop java_lang_reflect_Field::signature(oop field) {
2379 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2380 assert(has_signature_field(), "signature field must be present");
2381 return field->obj_field(signature_offset);
2382 }
2383
2384 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2385 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2386 assert(has_signature_field(), "signature field must be present");
2387 field->obj_field_put(signature_offset, value);
2388 }
2389
2390 bool java_lang_reflect_Field::has_annotations_field() {
2391 return (annotations_offset >= 0);
2392 }
2393
2394 oop java_lang_reflect_Field::annotations(oop field) {
2395 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2396 assert(has_annotations_field(), "annotations field must be present");
2397 return field->obj_field(annotations_offset);
2398 }
2399
2400 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2401 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2402 assert(has_annotations_field(), "annotations field must be present");
2403 field->obj_field_put(annotations_offset, value);
2404 }
2405
2406 bool java_lang_reflect_Field::has_type_annotations_field() {
2407 return (type_annotations_offset >= 0);
2408 }
2409
2410 oop java_lang_reflect_Field::type_annotations(oop field) {
2411 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2412 assert(has_type_annotations_field(), "type_annotations field must be present");
2413 return field->obj_field(type_annotations_offset);
2414 }
2415
2416 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2417 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2418 assert(has_type_annotations_field(), "type_annotations field must be present");
2419 field->obj_field_put(type_annotations_offset, value);
2420 }
2421
2422 void sun_reflect_ConstantPool::compute_offsets() {
2423 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2424 // This null test can be removed post beta
2425 if (k != NULL) {
2426 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2427 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2428 }
2429 }
2430
2431 void java_lang_reflect_Parameter::compute_offsets() {
2432 Klass* k = SystemDictionary::reflect_Parameter_klass();
2433 if(NULL != k) {
2434 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2435 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2436 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature());
2437 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature());
2438 }
2439 }
2440
2441 Handle java_lang_reflect_Parameter::create(TRAPS) {
2442 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2443 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2444 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2445 instanceKlassHandle klass (THREAD, k);
2446 // Ensure it is initialized
2447 klass->initialize(CHECK_NH);
2448 return klass->allocate_instance_handle(THREAD);
2449 }
2450
2451 oop java_lang_reflect_Parameter::name(oop param) {
2452 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2453 return param->obj_field(name_offset);
2454 }
2455
2456 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2457 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2458 param->obj_field_put(name_offset, value);
2459 }
2460
2461 int java_lang_reflect_Parameter::modifiers(oop param) {
2462 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2463 return param->int_field(modifiers_offset);
2464 }
2465
2466 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2467 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2468 param->int_field_put(modifiers_offset, value);
2469 }
2470
2471 int java_lang_reflect_Parameter::index(oop param) {
2472 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2473 return param->int_field(index_offset);
2474 }
2475
2476 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2477 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2478 param->int_field_put(index_offset, value);
2479 }
2480
2481 oop java_lang_reflect_Parameter::executable(oop param) {
2482 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2483 return param->obj_field(executable_offset);
2484 }
2485
2486 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2487 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2488 param->obj_field_put(executable_offset, value);
2489 }
2490
2491
2492 Handle sun_reflect_ConstantPool::create(TRAPS) {
2493 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2494 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2495 instanceKlassHandle klass (THREAD, k);
2496 // Ensure it is initialized
2497 klass->initialize(CHECK_NH);
2498 return klass->allocate_instance_handle(THREAD);
2499 }
2500
2501
2502 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2503 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2504 oop mirror = value->pool_holder()->java_mirror();
2505 // Save the mirror to get back the constant pool.
2506 reflect->obj_field_put(_oop_offset, mirror);
2507 }
2508
2509 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) {
2510 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2511
2512 oop mirror = reflect->obj_field(_oop_offset);
2513 Klass* k = java_lang_Class::as_Klass(mirror);
2514 assert(k->oop_is_instance(), "Must be");
2515
2516 // Get the constant pool back from the klass. Since class redefinition
2517 // merges the new constant pool into the old, this is essentially the
2518 // same constant pool as the original. If constant pool merging is
2519 // no longer done in the future, this will have to change to save
2520 // the original.
2521 return InstanceKlass::cast(k)->constants();
2522 }
2523
2524 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2525 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2526 // This null test can be removed post beta
2527 if (k != NULL) {
2528 compute_offset(_base_offset, k,
2529 vmSymbols::base_name(), vmSymbols::object_signature());
2530 }
2531 }
2532
2533 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2534 Klass* k = SystemDictionary::box_klass(type);
2535 if (k == NULL) return NULL;
2536 instanceKlassHandle h (THREAD, k);
2537 if (!h->is_initialized()) h->initialize(CHECK_0);
2538 return h->allocate_instance(THREAD);
2539 }
2540
2541
2542 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2543 oop box = initialize_and_allocate(type, CHECK_0);
2544 if (box == NULL) return NULL;
2545 switch (type) {
2546 case T_BOOLEAN:
2547 box->bool_field_put(value_offset, value->z);
2548 break;
2549 case T_CHAR:
2550 box->char_field_put(value_offset, value->c);
2551 break;
2552 case T_FLOAT:
2553 box->float_field_put(value_offset, value->f);
2554 break;
2555 case T_DOUBLE:
2556 box->double_field_put(long_value_offset, value->d);
2557 break;
2558 case T_BYTE:
2559 box->byte_field_put(value_offset, value->b);
2560 break;
2561 case T_SHORT:
2562 box->short_field_put(value_offset, value->s);
2563 break;
2564 case T_INT:
2565 box->int_field_put(value_offset, value->i);
2566 break;
2567 case T_LONG:
2568 box->long_field_put(long_value_offset, value->j);
2569 break;
2570 default:
2571 return NULL;
2572 }
2573 return box;
2574 }
2575
2576
2577 BasicType java_lang_boxing_object::basic_type(oop box) {
2578 if (box == NULL) return T_ILLEGAL;
2579 BasicType type = SystemDictionary::box_klass_type(box->klass());
2580 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2581 return T_ILLEGAL;
2582 return type;
2583 }
2584
2585
2586 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2587 BasicType type = SystemDictionary::box_klass_type(box->klass());
2588 switch (type) {
2589 case T_BOOLEAN:
2590 value->z = box->bool_field(value_offset);
2591 break;
2592 case T_CHAR:
2593 value->c = box->char_field(value_offset);
2594 break;
2595 case T_FLOAT:
2596 value->f = box->float_field(value_offset);
2597 break;
2598 case T_DOUBLE:
2599 value->d = box->double_field(long_value_offset);
2600 break;
2601 case T_BYTE:
2602 value->b = box->byte_field(value_offset);
2603 break;
2604 case T_SHORT:
2605 value->s = box->short_field(value_offset);
2606 break;
2607 case T_INT:
2608 value->i = box->int_field(value_offset);
2609 break;
2610 case T_LONG:
2611 value->j = box->long_field(long_value_offset);
2612 break;
2613 default:
2614 return T_ILLEGAL;
2615 } // end switch
2616 return type;
2617 }
2618
2619
2620 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2621 BasicType type = SystemDictionary::box_klass_type(box->klass());
2622 switch (type) {
2623 case T_BOOLEAN:
2624 box->bool_field_put(value_offset, value->z);
2625 break;
2626 case T_CHAR:
2627 box->char_field_put(value_offset, value->c);
2628 break;
2629 case T_FLOAT:
2630 box->float_field_put(value_offset, value->f);
2631 break;
2632 case T_DOUBLE:
2633 box->double_field_put(long_value_offset, value->d);
2634 break;
2635 case T_BYTE:
2636 box->byte_field_put(value_offset, value->b);
2637 break;
2638 case T_SHORT:
2639 box->short_field_put(value_offset, value->s);
2640 break;
2641 case T_INT:
2642 box->int_field_put(value_offset, value->i);
2643 break;
2644 case T_LONG:
2645 box->long_field_put(long_value_offset, value->j);
2646 break;
2647 default:
2648 return T_ILLEGAL;
2649 } // end switch
2650 return type;
2651 }
2652
2653
2654 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2655 switch (type) {
2656 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2657 case T_CHAR: st->print("%d", value->c); break;
2658 case T_BYTE: st->print("%d", value->b); break;
2659 case T_SHORT: st->print("%d", value->s); break;
2660 case T_INT: st->print("%d", value->i); break;
2661 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2662 case T_FLOAT: st->print("%f", value->f); break;
2663 case T_DOUBLE: st->print("%lf", value->d); break;
2664 default: st->print("type %d?", type); break;
2665 }
2666 }
2667
2668
2669 // Support for java_lang_ref_Reference
2670 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() {
2671 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2672 address addr = ik->static_field_addr(static_lock_offset);
2673 return (HeapWord*) addr;
2674 }
2675
2676 oop java_lang_ref_Reference::pending_list_lock() {
2677 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2678 address addr = ik->static_field_addr(static_lock_offset);
2679 if (UseCompressedOops) {
2680 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2681 } else {
2682 return oopDesc::load_decode_heap_oop((oop*)addr);
2683 }
2684 }
2685
2686 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2687 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2688 address addr = ik->static_field_addr(static_pending_offset);
2689 // XXX This might not be HeapWord aligned, almost rather be char *.
2690 return (HeapWord*)addr;
2691 }
2692
2693 oop java_lang_ref_Reference::pending_list() {
2694 char *addr = (char *)pending_list_addr();
2695 if (UseCompressedOops) {
2696 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2697 } else {
2698 return oopDesc::load_decode_heap_oop((oop*)addr);
2699 }
2700 }
2701
2702
2703 // Support for java_lang_ref_SoftReference
2704
2705 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2706 return ref->long_field(timestamp_offset);
2707 }
2708
2709 jlong java_lang_ref_SoftReference::clock() {
2710 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2711 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2712 return *offset;
2713 }
2714
2715 void java_lang_ref_SoftReference::set_clock(jlong value) {
2716 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2717 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2718 *offset = value;
2719 }
2720
2721 // Support for java_lang_invoke_DirectMethodHandle
2722
2723 int java_lang_invoke_DirectMethodHandle::_member_offset;
2724
2725 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
2726 oop member_name = NULL;
2727 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
2728 assert(is_dmh, "a DirectMethodHandle oop is expected");
2729 if (is_dmh) {
2730 member_name = dmh->obj_field(member_offset_in_bytes());
2731 }
2732 return member_name;
2733 }
2734
2735 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
2736 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
2737 if (klass_oop != NULL) {
2738 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2739 }
2740 }
2741
2742 // Support for java_lang_invoke_MethodHandle
2743
2744 int java_lang_invoke_MethodHandle::_type_offset;
2745 int java_lang_invoke_MethodHandle::_form_offset;
2746
2747 int java_lang_invoke_MemberName::_clazz_offset;
2748 int java_lang_invoke_MemberName::_name_offset;
2749 int java_lang_invoke_MemberName::_type_offset;
2750 int java_lang_invoke_MemberName::_flags_offset;
2751 int java_lang_invoke_MemberName::_vmtarget_offset;
2752 int java_lang_invoke_MemberName::_vmloader_offset;
2753 int java_lang_invoke_MemberName::_vmindex_offset;
2754
2755 int java_lang_invoke_LambdaForm::_vmentry_offset;
2756
2757 void java_lang_invoke_MethodHandle::compute_offsets() {
2758 Klass* klass_oop = SystemDictionary::MethodHandle_klass();
2759 if (klass_oop != NULL) {
2760 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
2761 compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
2762 }
2763 }
2764
2765 void java_lang_invoke_MemberName::compute_offsets() {
2766 Klass* klass_oop = SystemDictionary::MemberName_klass();
2767 if (klass_oop != NULL) {
2768 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature());
2769 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature());
2770 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature());
2771 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature());
2772 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2773 }
2774 }
2775
2776 void java_lang_invoke_LambdaForm::compute_offsets() {
2777 Klass* klass_oop = SystemDictionary::LambdaForm_klass();
2778 if (klass_oop != NULL) {
2779 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2780 }
2781 }
2782
2783 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
2784 return obj != NULL && is_subclass(obj->klass());
2785 }
2786
2787
2788 oop java_lang_invoke_MethodHandle::type(oop mh) {
2789 return mh->obj_field(_type_offset);
2790 }
2791
2792 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
2793 mh->obj_field_put(_type_offset, mtype);
2794 }
2795
2796 oop java_lang_invoke_MethodHandle::form(oop mh) {
2797 assert(_form_offset != 0, "");
2798 return mh->obj_field(_form_offset);
2799 }
2800
2801 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
2802 assert(_form_offset != 0, "");
2803 mh->obj_field_put(_form_offset, lform);
2804 }
2805
2806 /// MemberName accessors
2807
2808 oop java_lang_invoke_MemberName::clazz(oop mname) {
2809 assert(is_instance(mname), "wrong type");
2810 return mname->obj_field(_clazz_offset);
2811 }
2812
2813 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
2814 assert(is_instance(mname), "wrong type");
2815 mname->obj_field_put(_clazz_offset, clazz);
2816 }
2817
2818 oop java_lang_invoke_MemberName::name(oop mname) {
2819 assert(is_instance(mname), "wrong type");
2820 return mname->obj_field(_name_offset);
2821 }
2822
2823 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
2824 assert(is_instance(mname), "wrong type");
2825 mname->obj_field_put(_name_offset, name);
2826 }
2827
2828 oop java_lang_invoke_MemberName::type(oop mname) {
2829 assert(is_instance(mname), "wrong type");
2830 return mname->obj_field(_type_offset);
2831 }
2832
2833 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
2834 assert(is_instance(mname), "wrong type");
2835 mname->obj_field_put(_type_offset, type);
2836 }
2837
2838 int java_lang_invoke_MemberName::flags(oop mname) {
2839 assert(is_instance(mname), "wrong type");
2840 return mname->int_field(_flags_offset);
2841 }
2842
2843 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
2844 assert(is_instance(mname), "wrong type");
2845 mname->int_field_put(_flags_offset, flags);
2846 }
2847
2848 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
2849 assert(is_instance(mname), "wrong type");
2850 return (Metadata*)mname->address_field(_vmtarget_offset);
2851 }
2852
2853 bool java_lang_invoke_MemberName::is_method(oop mname) {
2854 assert(is_instance(mname), "must be MemberName");
2855 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
2856 }
2857
2858 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
2859 assert(is_instance(mname), "wrong type");
2860 // check the type of the vmtarget
2861 oop dependency = NULL;
2862 if (ref != NULL) {
2863 switch (flags(mname) & (MN_IS_METHOD |
2864 MN_IS_CONSTRUCTOR |
2865 MN_IS_FIELD)) {
2866 case MN_IS_METHOD:
2867 case MN_IS_CONSTRUCTOR:
2868 assert(ref->is_method(), "should be a method");
2869 dependency = ((Method*)ref)->method_holder()->java_mirror();
2870 break;
2871 case MN_IS_FIELD:
2872 assert(ref->is_klass(), "should be a class");
2873 dependency = ((Klass*)ref)->java_mirror();
2874 break;
2875 default:
2876 ShouldNotReachHere();
2877 }
2878 }
2879 mname->address_field_put(_vmtarget_offset, (address)ref);
2880 // Add a reference to the loader (actually mirror because anonymous classes will not have
2881 // distinct loaders) to ensure the metadata is kept alive
2882 // This mirror may be different than the one in clazz field.
2883 mname->obj_field_put(_vmloader_offset, dependency);
2884 }
2885
2886 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
2887 assert(is_instance(mname), "wrong type");
2888 return (intptr_t) mname->address_field(_vmindex_offset);
2889 }
2890
2891 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
2892 assert(is_instance(mname), "wrong type");
2893 mname->address_field_put(_vmindex_offset, (address) index);
2894 }
2895
2896 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
2897 assert(is_instance(lform), "wrong type");
2898 return lform->obj_field(_vmentry_offset);
2899 }
2900
2901
2902 // Support for java_lang_invoke_MethodType
2903
2904 int java_lang_invoke_MethodType::_rtype_offset;
2905 int java_lang_invoke_MethodType::_ptypes_offset;
2906
2907 void java_lang_invoke_MethodType::compute_offsets() {
2908 Klass* k = SystemDictionary::MethodType_klass();
2909 if (k != NULL) {
2910 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2911 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2912 }
2913 }
2914
2915 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
2916 st->print("(");
2917 objArrayOop pts = ptypes(mt);
2918 for (int i = 0, limit = pts->length(); i < limit; i++) {
2919 java_lang_Class::print_signature(pts->obj_at(i), st);
2920 }
2921 st->print(")");
2922 java_lang_Class::print_signature(rtype(mt), st);
2923 }
2924
2925 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2926 ResourceMark rm;
2927 stringStream buffer(128);
2928 print_signature(mt, &buffer);
2929 const char* sigstr = buffer.base();
2930 int siglen = (int) buffer.size();
2931 Symbol *name;
2932 if (!intern_if_not_found) {
2933 name = SymbolTable::probe(sigstr, siglen);
2934 } else {
2935 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2936 }
2937 return name;
2938 }
2939
2940 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
2941 if (mt1 == mt2)
2942 return true;
2943 if (rtype(mt1) != rtype(mt2))
2944 return false;
2945 if (ptype_count(mt1) != ptype_count(mt2))
2946 return false;
2947 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
2948 if (ptype(mt1, i) != ptype(mt2, i))
2949 return false;
2950 }
2951 return true;
2952 }
2953
2954 oop java_lang_invoke_MethodType::rtype(oop mt) {
2955 assert(is_instance(mt), "must be a MethodType");
2956 return mt->obj_field(_rtype_offset);
2957 }
2958
2959 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
2960 assert(is_instance(mt), "must be a MethodType");
2961 return (objArrayOop) mt->obj_field(_ptypes_offset);
2962 }
2963
2964 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
2965 return ptypes(mt)->obj_at(idx);
2966 }
2967
2968 int java_lang_invoke_MethodType::ptype_count(oop mt) {
2969 return ptypes(mt)->length();
2970 }
2971
2972 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
2973 objArrayOop pts = ptypes(mt);
2974 int count = pts->length();
2975 int slots = 0;
2976 for (int i = 0; i < count; i++) {
2977 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
2978 slots += type2size[bt];
2979 }
2980 return slots;
2981 }
2982
2983 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
2984 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
2985 return type2size[bt];
2986 }
2987
2988
2989 // Support for java_lang_invoke_CallSite
2990
2991 int java_lang_invoke_CallSite::_target_offset;
2992 int java_lang_invoke_CallSite::_context_offset;
2993
2994 void java_lang_invoke_CallSite::compute_offsets() {
2995 Klass* k = SystemDictionary::CallSite_klass();
2996 if (k != NULL) {
2997 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
2998 compute_offset(_context_offset, k, vmSymbols::context_name(),
2999 vmSymbols::java_lang_invoke_MethodHandleNatives_CallSiteContext_signature());
3000 }
3001 }
3002
3003 oop java_lang_invoke_CallSite::context(oop call_site) {
3004 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3005
3006 oop dep_oop = call_site->obj_field(_context_offset);
3007 return dep_oop;
3008 }
3009
3010 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3011
3012 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3013
3014 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3015 Klass* k = SystemDictionary::Context_klass();
3016 if (k != NULL) {
3017 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3018 }
3019 }
3020
3021 nmethodBucket* java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3022 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3023 return (nmethodBucket*) (address) call_site->long_field(_vmdependencies_offset);
3024 }
3025
3026 void java_lang_invoke_MethodHandleNatives_CallSiteContext::set_vmdependencies(oop call_site, nmethodBucket* context) {
3027 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3028 call_site->long_field_put(_vmdependencies_offset, (jlong) (address) context);
3029 }
3030
3031 // Support for java_security_AccessControlContext
3032
3033 int java_security_AccessControlContext::_context_offset = 0;
3034 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3035 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3036 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3037
3038 void java_security_AccessControlContext::compute_offsets() {
3039 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3040 fieldDescriptor fd;
3041 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass());
3042
3043 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
3044 fatal("Invalid layout of java.security.AccessControlContext");
3045 }
3046 _context_offset = fd.offset();
3047
3048 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
3049 fatal("Invalid layout of java.security.AccessControlContext");
3050 }
3051 _privilegedContext_offset = fd.offset();
3052
3053 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
3054 fatal("Invalid layout of java.security.AccessControlContext");
3055 }
3056 _isPrivileged_offset = fd.offset();
3057
3058 // The offset may not be present for bootstrapping with older JDK.
3059 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
3060 _isAuthorized_offset = fd.offset();
3061 }
3062 }
3063
3064
3065 bool java_security_AccessControlContext::is_authorized(Handle context) {
3066 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
3067 assert(_isAuthorized_offset != -1, "should be set");
3068 return context->bool_field(_isAuthorized_offset) != 0;
3069 }
3070
3071 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3072 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3073 // Ensure klass is initialized
3074 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
3075 // Allocate result
3076 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
3077 // Fill in values
3078 result->obj_field_put(_context_offset, context());
3079 result->obj_field_put(_privilegedContext_offset, privileged_context());
3080 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3081 // whitelist AccessControlContexts created by the JVM if present
3082 if (_isAuthorized_offset != -1) {
3083 result->bool_field_put(_isAuthorized_offset, true);
3084 }
3085 return result;
3086 }
3087
3088
3089 // Support for java_lang_ClassLoader
3090
3091 bool java_lang_ClassLoader::offsets_computed = false;
3092 int java_lang_ClassLoader::_loader_data_offset = -1;
3093 int java_lang_ClassLoader::parallelCapable_offset = -1;
3094
3095 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
3096 assert(loader != NULL && loader->is_oop(), "loader must be oop");
3097 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
3098 }
3099
3100 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
3101 loader = oopDesc::bs()->read_barrier(loader);
3102 return *java_lang_ClassLoader::loader_data_addr(loader);
3103 }
3104
3105 void java_lang_ClassLoader::compute_offsets() {
3106 assert(!offsets_computed, "offsets should be initialized only once");
3107 offsets_computed = true;
3108
3109 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
3110 Klass* k1 = SystemDictionary::ClassLoader_klass();
3111 compute_optional_offset(parallelCapable_offset,
3112 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
3113
3114 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3115 }
3116
3117 oop java_lang_ClassLoader::parent(oop loader) {
3118 if (ShenandoahVerifyReadsToFromSpace) {
3119 loader = oopDesc::bs()->read_barrier(loader);
3120 }
3121 assert(is_instance(loader), "loader must be oop");
3122 return loader->obj_field(parent_offset);
3123 }
3124
3125 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3126 assert(is_instance(loader), "loader must be oop");
3127 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3128 oop acl = loader;
3129 debug_only(jint loop_count = 0);
3130 // This loop taken verbatim from ClassLoader.java:
3131 do {
3132 acl = parent(acl);
3133 if (cl == acl) {
3134 return true;
3135 }
3136 assert(++loop_count > 0, "loop_count overflow");
3137 } while (acl != NULL);
3138 return false;
3139 }
3140
3141 bool java_lang_ClassLoader::is_instance(oop obj) {
3142 return obj != NULL && is_subclass(obj->klass());
3143 }
3144
3145
3146 // For class loader classes, parallelCapable defined
3147 // based on non-null field
3148 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3149 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3150 if (parallelCapable_offset == -1) {
3151 // Default for backward compatibility is false
3152 return false;
3153 }
3154 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3155 }
3156
3157 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3158 // Fix for 4474172; see evaluation for more details
3159 loader = non_reflection_class_loader(loader);
3160
3161 oop cl = SystemDictionary::java_system_loader();
3162 while(cl != NULL) {
3163 if (cl == loader) return true;
3164 cl = parent(cl);
3165 }
3166 return false;
3167 }
3168
3169 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3170 if (loader != NULL) {
3171 // See whether this is one of the class loaders associated with
3172 // the generated bytecodes for reflection, and if so, "magically"
3173 // delegate to its parent to prevent class loading from occurring
3174 // in places where applications using reflection didn't expect it.
3175 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3176 // This might be null in non-1.4 JDKs
3177 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
3178 return parent(loader);
3179 }
3180 }
3181 return loader;
3182 }
3183
3184
3185 // Support for java_lang_System
3186 int java_lang_System::in_offset_in_bytes() {
3187 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3188 }
3189
3190
3191 int java_lang_System::out_offset_in_bytes() {
3192 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3193 }
3194
3195
3196 int java_lang_System::err_offset_in_bytes() {
3197 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3198 }
3199
3200
3201 bool java_lang_System::has_security_manager() {
3202 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass());
3203 address addr = ik->static_field_addr(static_security_offset);
3204 if (UseCompressedOops) {
3205 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3206 } else {
3207 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3208 }
3209 }
3210
3211 int java_lang_Class::_klass_offset;
3212 int java_lang_Class::_array_klass_offset;
3213 int java_lang_Class::_oop_size_offset;
3214 int java_lang_Class::_static_oop_field_count_offset;
3215 int java_lang_Class::_class_loader_offset;
3216 int java_lang_Class::_protection_domain_offset;
3217 int java_lang_Class::_component_mirror_offset;
3218 int java_lang_Class::_init_lock_offset;
3219 int java_lang_Class::_signers_offset;
3220 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3221 int java_lang_Throwable::backtrace_offset;
3222 int java_lang_Throwable::detailMessage_offset;
3223 int java_lang_Throwable::cause_offset;
3224 int java_lang_Throwable::stackTrace_offset;
3225 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3226 int java_lang_reflect_AccessibleObject::override_offset;
3227 int java_lang_reflect_Method::clazz_offset;
3228 int java_lang_reflect_Method::name_offset;
3229 int java_lang_reflect_Method::returnType_offset;
3230 int java_lang_reflect_Method::parameterTypes_offset;
3231 int java_lang_reflect_Method::exceptionTypes_offset;
3232 int java_lang_reflect_Method::slot_offset;
3233 int java_lang_reflect_Method::modifiers_offset;
3234 int java_lang_reflect_Method::signature_offset;
3235 int java_lang_reflect_Method::annotations_offset;
3236 int java_lang_reflect_Method::parameter_annotations_offset;
3237 int java_lang_reflect_Method::annotation_default_offset;
3238 int java_lang_reflect_Method::type_annotations_offset;
3239 int java_lang_reflect_Constructor::clazz_offset;
3240 int java_lang_reflect_Constructor::parameterTypes_offset;
3241 int java_lang_reflect_Constructor::exceptionTypes_offset;
3242 int java_lang_reflect_Constructor::slot_offset;
3243 int java_lang_reflect_Constructor::modifiers_offset;
3244 int java_lang_reflect_Constructor::signature_offset;
3245 int java_lang_reflect_Constructor::annotations_offset;
3246 int java_lang_reflect_Constructor::parameter_annotations_offset;
3247 int java_lang_reflect_Constructor::type_annotations_offset;
3248 int java_lang_reflect_Field::clazz_offset;
3249 int java_lang_reflect_Field::name_offset;
3250 int java_lang_reflect_Field::type_offset;
3251 int java_lang_reflect_Field::slot_offset;
3252 int java_lang_reflect_Field::modifiers_offset;
3253 int java_lang_reflect_Field::signature_offset;
3254 int java_lang_reflect_Field::annotations_offset;
3255 int java_lang_reflect_Field::type_annotations_offset;
3256 int java_lang_reflect_Parameter::name_offset;
3257 int java_lang_reflect_Parameter::modifiers_offset;
3258 int java_lang_reflect_Parameter::index_offset;
3259 int java_lang_reflect_Parameter::executable_offset;
3260 int java_lang_boxing_object::value_offset;
3261 int java_lang_boxing_object::long_value_offset;
3262 int java_lang_ref_Reference::referent_offset;
3263 int java_lang_ref_Reference::queue_offset;
3264 int java_lang_ref_Reference::next_offset;
3265 int java_lang_ref_Reference::discovered_offset;
3266 int java_lang_ref_Reference::static_lock_offset;
3267 int java_lang_ref_Reference::static_pending_offset;
3268 int java_lang_ref_Reference::number_of_fake_oop_fields;
3269 int java_lang_ref_SoftReference::timestamp_offset;
3270 int java_lang_ref_SoftReference::static_clock_offset;
3271 int java_lang_ClassLoader::parent_offset;
3272 int java_lang_System::static_in_offset;
3273 int java_lang_System::static_out_offset;
3274 int java_lang_System::static_err_offset;
3275 int java_lang_System::static_security_offset;
3276 int java_lang_StackTraceElement::declaringClass_offset;
3277 int java_lang_StackTraceElement::methodName_offset;
3278 int java_lang_StackTraceElement::fileName_offset;
3279 int java_lang_StackTraceElement::lineNumber_offset;
3280 int java_lang_AssertionStatusDirectives::classes_offset;
3281 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3282 int java_lang_AssertionStatusDirectives::packages_offset;
3283 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3284 int java_lang_AssertionStatusDirectives::deflt_offset;
3285 int java_nio_Buffer::_limit_offset;
3286 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3287 int sun_reflect_ConstantPool::_oop_offset;
3288 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3289
3290
3291 // Support for java_lang_StackTraceElement
3292
3293 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3294 element->obj_field_put(fileName_offset, value);
3295 }
3296
3297 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3298 element->obj_field_put(declaringClass_offset, value);
3299 }
3300
3301 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3302 element->obj_field_put(methodName_offset, value);
3303 }
3304
3305 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3306 element->int_field_put(lineNumber_offset, value);
3307 }
3308
3309
3310 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3311
3312 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3313 o->obj_field_put(classes_offset, val);
3314 }
3315
3316 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3317 o->obj_field_put(classEnabled_offset, val);
3318 }
3319
3320 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3321 o->obj_field_put(packages_offset, val);
3322 }
3323
3324 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3325 o->obj_field_put(packageEnabled_offset, val);
3326 }
3327
3328 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3329 o->bool_field_put(deflt_offset, val);
3330 }
3331
3332
3333 // Support for intrinsification of java.nio.Buffer.checkIndex
3334 int java_nio_Buffer::limit_offset() {
3335 return _limit_offset;
3336 }
3337
3338
3339 void java_nio_Buffer::compute_offsets() {
3340 Klass* k = SystemDictionary::nio_Buffer_klass();
3341 assert(k != NULL, "must be loaded in 1.4+");
3342 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3343 }
3344
3345 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3346 if (_owner_offset != 0) return;
3347
3348 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3349 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3350 compute_offset(_owner_offset, k,
3351 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3352 }
3353
3354 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3355 assert(_owner_offset != 0, "Must be initialized");
3356 return obj->obj_field(_owner_offset);
3357 }
3358
3359 // Compute hard-coded offsets
3360 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3361 // are not available to determine the offset_of_static_fields.
3362 void JavaClasses::compute_hard_coded_offsets() {
3363 const int x = heapOopSize;
3364 const int header = instanceOopDesc::base_offset_in_bytes();
3365
3366 // Throwable Class
3367 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
3368 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3369 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
3370 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3371 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x;
3372
3373 // java_lang_boxing_object
3374 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3375 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3376
3377 // java_lang_ref_Reference:
3378 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3379 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3380 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
3381 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
3382 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
3383 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3384 // Artificial fields for java_lang_ref_Reference
3385 // The first field is for the discovered field added in 1.4
3386 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3387
3388 // java_lang_ref_SoftReference Class
3389 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3390 // Don't multiply static fields because they are always in wordSize units
3391 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3392
3393 // java_lang_ClassLoader
3394 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3395
3396 // java_lang_System
3397 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
3398 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3399 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3400 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3401
3402 // java_lang_StackTraceElement
3403 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
3404 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3405 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
3406 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3407 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3408 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3409 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3410 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3411 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3412
3413 }
3414
3415
3416 // Compute non-hard-coded field offsets of all the classes in this file
3417 void JavaClasses::compute_offsets() {
3418 // java_lang_Class::compute_offsets was called earlier in bootstrap
3419 java_lang_ClassLoader::compute_offsets();
3420 java_lang_Thread::compute_offsets();
3421 java_lang_ThreadGroup::compute_offsets();
3422 java_lang_invoke_MethodHandle::compute_offsets();
3423 java_lang_invoke_DirectMethodHandle::compute_offsets();
3424 java_lang_invoke_MemberName::compute_offsets();
3425 java_lang_invoke_LambdaForm::compute_offsets();
3426 java_lang_invoke_MethodType::compute_offsets();
3427 java_lang_invoke_CallSite::compute_offsets();
3428 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets();
3429 java_security_AccessControlContext::compute_offsets();
3430 // Initialize reflection classes. The layouts of these classes
3431 // changed with the new reflection implementation in JDK 1.4, and
3432 // since the Universe doesn't know what JDK version it is until this
3433 // point we defer computation of these offsets until now.
3434 java_lang_reflect_AccessibleObject::compute_offsets();
3435 java_lang_reflect_Method::compute_offsets();
3436 java_lang_reflect_Constructor::compute_offsets();
3437 java_lang_reflect_Field::compute_offsets();
3438 java_nio_Buffer::compute_offsets();
3439 sun_reflect_ConstantPool::compute_offsets();
3440 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3441 java_lang_reflect_Parameter::compute_offsets();
3442
3443 // generated interpreter code wants to know about the offsets we just computed:
3444 AbstractAssembler::update_delayed_values();
3445 }
3446
3447 #ifndef PRODUCT
3448
3449 // These functions exist to assert the validity of hard-coded field offsets to guard
3450 // against changes in the class files
3451
3452 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3453 EXCEPTION_MARK;
3454 fieldDescriptor fd;
3455 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3456 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3457 instanceKlassHandle h_klass (THREAD, k);
3458 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3459 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3460 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3461 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3462 return false;
3463 }
3464 if (fd.is_static()) {
3465 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3466 return false;
3467 }
3468 if (fd.offset() == hardcoded_offset ) {
3469 return true;
3470 } else {
3471 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3472 klass_name, field_name, hardcoded_offset, fd.offset());
3473 return false;
3474 }
3475 }
3476
3477
3478 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3479 EXCEPTION_MARK;
3480 fieldDescriptor fd;
3481 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3482 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3483 instanceKlassHandle h_klass (THREAD, k);
3484 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3485 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3486 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3487 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3488 return false;
3489 }
3490 if (!fd.is_static()) {
3491 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3492 return false;
3493 }
3494 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3495 return true;
3496 } else {
3497 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());
3498 return false;
3499 }
3500 }
3501
3502
3503 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3504 EXCEPTION_MARK;
3505 fieldDescriptor fd;
3506 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3507 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3508 instanceKlassHandle h_klass (THREAD, k);
3509 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3510 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3511 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3512 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3513 return false;
3514 }
3515 if (!fd.is_static() || !fd.has_initial_value()) {
3516 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3517 return false;
3518 }
3519 if (!fd.initial_value_tag().is_int()) {
3520 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3521 return false;
3522 }
3523 jint field_value = fd.int_initial_value();
3524 if (field_value == hardcoded_constant) {
3525 return true;
3526 } else {
3527 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);
3528 return false;
3529 }
3530 }
3531
3532
3533 // Check the hard-coded field offsets of all the classes in this file
3534
3535 void JavaClasses::check_offsets() {
3536 bool valid = true;
3537 HandleMark hm;
3538
3539 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3540 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3541
3542 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3543 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3544
3545 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3546 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3547
3548 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3549 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3550
3551 // java.lang.String
3552
3553 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3554 if (java_lang_String::has_offset_field()) {
3555 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3556 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3557 }
3558 if (java_lang_String::has_hash_field()) {
3559 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3560 }
3561
3562 // java.lang.Class
3563
3564 // Fake fields
3565 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3566 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3567
3568 // java.lang.Throwable
3569
3570 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3571 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3572 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3573 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3574
3575 // Boxed primitive objects (java_lang_boxing_object)
3576
3577 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3578 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3579 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3580 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3581 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3582 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3583 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3584 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3585
3586 // java.lang.ClassLoader
3587
3588 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3589
3590 // java.lang.System
3591
3592 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3593 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3594 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3595 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
3596
3597 // java.lang.StackTraceElement
3598
3599 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3600 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3601 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3602 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3603
3604 // java.lang.ref.Reference
3605
3606 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3607 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3608 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3609 // Fake field
3610 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3611 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3612 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3613
3614 // java.lang.ref.SoftReference
3615
3616 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3617 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3618
3619 // java.lang.AssertionStatusDirectives
3620 //
3621 // The CheckAssertionStatusDirectives boolean can be removed from here and
3622 // globals.hpp after the AssertionStatusDirectives class has been integrated
3623 // into merlin "for some time." Without it, the vm will fail with early
3624 // merlin builds.
3625
3626 if (CheckAssertionStatusDirectives) {
3627 const char* nm = "java/lang/AssertionStatusDirectives";
3628 const char* sig = "[Ljava/lang/String;";
3629 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3630 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3631 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3632 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3633 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3634 }
3635
3636 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3637 }
3638
3639 #endif // PRODUCT
3640
3641 int InjectedField::compute_offset() {
3642 Klass* klass_oop = klass();
3643 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3644 if (!may_be_java && !fs.access_flags().is_internal()) {
3645 // Only look at injected fields
3646 continue;
3647 }
3648 if (fs.name() == name() && fs.signature() == signature()) {
3649 return fs.offset();
3650 }
3651 }
3652 ResourceMark rm;
3653 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)" : "");
3654 #ifndef PRODUCT
3655 klass_oop->print();
3656 tty->print_cr("all fields:");
3657 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3658 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
3659 }
3660 #endif //PRODUCT
3661 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class");
3662 return -1;
3663 }
3664
3665 void javaClasses_init() {
3666 JavaClasses::compute_offsets();
3667 JavaClasses::check_offsets();
3668 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3669 }