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