1 /*
2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/altHashing.hpp"
27 #include "classfile/javaClasses.inline.hpp"
28 #include "classfile/stringTable.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "code/debugInfo.hpp"
31 #include "code/pcDesc.hpp"
32 #include "compiler/compilerOracle.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "memory/oopFactory.hpp"
35 #include "memory/resourceArea.hpp"
36 #include "memory/universe.inline.hpp"
37 #include "oops/fieldStreams.hpp"
38 #include "oops/instanceKlass.hpp"
39 #include "oops/instanceMirrorKlass.hpp"
40 #include "oops/klass.hpp"
41 #include "oops/method.hpp"
42 #include "oops/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 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
58
59 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
60 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
61
62 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
63 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
64
65 InjectedField JavaClasses::_injected_fields[] = {
66 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
67 };
68
69 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
70 return _injected_fields[id].compute_offset();
71 }
72
73
74 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
75 *field_count = 0;
76
77 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
78 if (sid == vmSymbols::NO_SID) {
79 // Only well known classes can inject fields
80 return NULL;
81 }
82
83 int count = 0;
84 int start = -1;
85
86 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
87 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
88 count++; \
89 if (start == -1) start = klass##_##name##_enum; \
90 }
91 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
92 #undef LOOKUP_INJECTED_FIELD
93
94 if (start != -1) {
95 *field_count = count;
96 return _injected_fields + start;
97 }
98 return NULL;
99 }
100
101
102 static bool find_field(InstanceKlass* ik,
103 Symbol* name_symbol, Symbol* signature_symbol,
104 fieldDescriptor* fd,
105 bool allow_super = false) {
106 if (allow_super)
107 return ik->find_field(name_symbol, signature_symbol, fd) != NULL;
108 else
109 return ik->find_local_field(name_symbol, signature_symbol, fd);
110 }
111
112 // Helpful routine for computing field offsets at run time rather than hardcoding them
113 static void
114 compute_offset(int &dest_offset,
115 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
116 bool allow_super = false) {
117 fieldDescriptor fd;
118 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
119 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
120 ResourceMark rm;
121 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
122 #ifndef PRODUCT
123 klass_oop->print();
124 tty->print_cr("all fields:");
125 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
126 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
127 }
128 #endif //PRODUCT
129 fatal("Invalid layout of preloaded class");
130 }
131 dest_offset = fd.offset();
132 }
133
134 // Same as above but for "optional" offsets that might not be present in certain JDK versions
135 static void
136 compute_optional_offset(int& dest_offset,
137 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
138 bool allow_super = false) {
139 fieldDescriptor fd;
140 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
141 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
142 dest_offset = fd.offset();
143 }
144 }
145
146
147 int java_lang_String::value_offset = 0;
148 int java_lang_String::offset_offset = 0;
149 int java_lang_String::count_offset = 0;
150 int java_lang_String::hash_offset = 0;
151
152 bool java_lang_String::initialized = false;
153
154 bool java_lang_String::is_instance(oop obj) {
155 return is_instance_inlined(obj);
156 }
157
158 void java_lang_String::compute_offsets() {
159 assert(!initialized, "offsets should be initialized only once");
160
161 Klass* k = SystemDictionary::String_klass();
162 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature());
163 compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature());
164 compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature());
165 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature());
166
167 initialized = true;
168 }
169
170 Handle java_lang_String::basic_create(int length, TRAPS) {
171 assert(initialized, "Must be initialized");
172 // Create the String object first, so there's a chance that the String
173 // and the char array it points to end up in the same cache line.
174 oop obj;
175 obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH);
176
177 // Create the char array. The String object must be handlized here
178 // because GC can happen as a result of the allocation attempt.
179 Handle h_obj(THREAD, obj);
180 typeArrayOop buffer;
181 buffer = oopFactory::new_charArray(length, CHECK_NH);
182
183 // Point the String at the char array
184 obj = h_obj();
185 set_value(obj, buffer);
186 // No need to zero the offset, allocation zero'ed the entire String object
187 assert(offset(obj) == 0, "initial String offset should be zero");
188 //set_offset(obj, 0);
189 set_count(obj, length);
190
191 return h_obj;
192 }
193
194 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
195 Handle h_obj = basic_create(length, CHECK_NH);
196 typeArrayOop buffer = value(h_obj());
197 for (int index = 0; index < length; index++) {
198 buffer->char_at_put(index, unicode[index]);
199 }
200 return h_obj;
201 }
202
203 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
204 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
205 return h_obj();
206 }
207
208 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
209 if (utf8_str == NULL) {
210 return Handle();
211 }
212 int length = UTF8::unicode_length(utf8_str);
213 Handle h_obj = basic_create(length, CHECK_NH);
214 if (length > 0) {
215 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
216 }
217 return h_obj;
218 }
219
220 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
221 Handle h_obj = create_from_str(utf8_str, CHECK_0);
222 return h_obj();
223 }
224
225 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
226 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
227 Handle h_obj = basic_create(length, CHECK_NH);
228 if (length > 0) {
229 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
230 }
231 return h_obj;
232 }
233
234 // Converts a C string to a Java String based on current encoding
235 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
236 assert(str != NULL, "bad arguments");
237
238 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
239 static to_java_string_fn_t _to_java_string_fn = NULL;
240
241 if (_to_java_string_fn == NULL) {
242 void *lib_handle = os::native_java_library();
243 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
244 if (_to_java_string_fn == NULL) {
245 fatal("NewStringPlatform missing");
246 }
247 }
248
249 jstring js = NULL;
250 { JavaThread* thread = (JavaThread*)THREAD;
251 assert(thread->is_Java_thread(), "must be java thread");
252 HandleMark hm(thread);
253 ThreadToNativeFromVM ttn(thread);
254 js = (_to_java_string_fn)(thread->jni_environment(), str);
255 }
256 return Handle(THREAD, JNIHandles::resolve(js));
257 }
258
259 // Converts a Java String to a native C string that can be used for
260 // native OS calls.
261 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
262
263 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
264 static to_platform_string_fn_t _to_platform_string_fn = NULL;
265
266 if (_to_platform_string_fn == NULL) {
267 void *lib_handle = os::native_java_library();
268 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
269 if (_to_platform_string_fn == NULL) {
270 fatal("GetStringPlatformChars missing");
271 }
272 }
273
274 char *native_platform_string;
275 { JavaThread* thread = (JavaThread*)THREAD;
276 assert(thread->is_Java_thread(), "must be java thread");
277 JNIEnv *env = thread->jni_environment();
278 jstring js = (jstring) JNIHandles::make_local(env, java_string());
279 bool is_copy;
280 HandleMark hm(thread);
281 ThreadToNativeFromVM ttn(thread);
282 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
283 assert(is_copy == JNI_TRUE, "is_copy value changed");
284 JNIHandles::destroy_local(js);
285 }
286 return native_platform_string;
287 }
288
289 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
290 oop obj = java_string();
291 // Typical usage is to convert all '/' to '.' in string.
292 typeArrayOop value = java_lang_String::value(obj);
293 int offset = java_lang_String::offset(obj);
294 int length = java_lang_String::length(obj);
295
296 // First check if any from_char exist
297 int index; // Declared outside, used later
298 for (index = 0; index < length; index++) {
299 if (value->char_at(index + offset) == from_char) {
300 break;
301 }
302 }
303 if (index == length) {
304 // No from_char, so do not copy.
305 return java_string;
306 }
307
308 // Create new UNICODE buffer. Must handlize value because GC
309 // may happen during String and char array creation.
310 typeArrayHandle h_value(THREAD, value);
311 Handle string = basic_create(length, CHECK_NH);
312
313 typeArrayOop from_buffer = h_value();
314 typeArrayOop to_buffer = java_lang_String::value(string());
315
316 // Copy contents
317 for (index = 0; index < length; index++) {
318 jchar c = from_buffer->char_at(index + offset);
319 if (c == from_char) {
320 c = to_char;
321 }
322 to_buffer->char_at_put(index, c);
323 }
324 return string;
325 }
326
327 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
328 typeArrayOop value = java_lang_String::value(java_string);
329 int offset = java_lang_String::offset(java_string);
330 length = java_lang_String::length(java_string);
331
332 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
333 if (result != NULL) {
334 for (int index = 0; index < length; index++) {
335 result[index] = value->char_at(index + offset);
336 }
337 } else {
338 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
339 }
340 return result;
341 }
342
343 unsigned int java_lang_String::hash_code(oop java_string) {
344 int length = java_lang_String::length(java_string);
345 // Zero length string will hash to zero with String.hashCode() function.
346 if (length == 0) return 0;
347
348 typeArrayOop value = java_lang_String::value(java_string);
349 int offset = java_lang_String::offset(java_string);
350 return java_lang_String::hash_code(value->char_at_addr(offset), length);
351 }
352
353 char* java_lang_String::as_quoted_ascii(oop java_string) {
354 typeArrayOop value = java_lang_String::value(java_string);
355 int offset = java_lang_String::offset(java_string);
356 int length = java_lang_String::length(java_string);
357
358 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
359 if (base == NULL) return NULL;
360
361 int result_length = UNICODE::quoted_ascii_length(base, length) + 1;
362 char* result = NEW_RESOURCE_ARRAY(char, result_length);
363 UNICODE::as_quoted_ascii(base, length, result, result_length);
364 assert(result_length >= length + 1, "must not be shorter");
365 assert(result_length == (int)strlen(result) + 1, "must match");
366 return result;
367 }
368
369 unsigned int java_lang_String::hash_string(oop java_string) {
370 int length = java_lang_String::length(java_string);
371 // Zero length string doesn't hash necessarily hash to zero.
372 if (length == 0) {
373 return StringTable::hash_string(NULL, 0);
374 }
375
376 typeArrayOop value = java_lang_String::value(java_string);
377 int offset = java_lang_String::offset(java_string);
378 return StringTable::hash_string(value->char_at_addr(offset), length);
379 }
380
381 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {
382 oop obj = java_string();
383 typeArrayOop value = java_lang_String::value(obj);
384 int offset = java_lang_String::offset(obj);
385 int length = java_lang_String::length(obj);
386 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
387 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
388 return sym;
389 }
390
391 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
392 typeArrayOop value = java_lang_String::value(java_string);
393 int offset = java_lang_String::offset(java_string);
394 int length = java_lang_String::length(java_string);
395 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
396 return SymbolTable::probe_unicode(base, length);
397 }
398
399
400 int java_lang_String::utf8_length(oop java_string) {
401 typeArrayOop value = java_lang_String::value(java_string);
402 int offset = java_lang_String::offset(java_string);
403 int length = java_lang_String::length(java_string);
404 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
405 return UNICODE::utf8_length(position, length);
406 }
407
408 char* java_lang_String::as_utf8_string(oop java_string) {
409 typeArrayOop value = java_lang_String::value(java_string);
410 int offset = java_lang_String::offset(java_string);
411 int length = java_lang_String::length(java_string);
412 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
413 return UNICODE::as_utf8(position, length);
414 }
415
416 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
417 typeArrayOop value = java_lang_String::value(java_string);
418 int offset = java_lang_String::offset(java_string);
419 int length = java_lang_String::length(java_string);
420 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
421 return UNICODE::as_utf8(position, length, buf, buflen);
422 }
423
424 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
425 typeArrayOop value = java_lang_String::value(java_string);
426 int offset = java_lang_String::offset(java_string);
427 int length = java_lang_String::length(java_string);
428 assert(start + len <= length, "just checking");
429 jchar* position = value->char_at_addr(offset + start);
430 return UNICODE::as_utf8(position, len);
431 }
432
433 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) {
434 typeArrayOop value = java_lang_String::value(java_string);
435 int offset = java_lang_String::offset(java_string);
436 int length = java_lang_String::length(java_string);
437 assert(start + len <= length, "just checking");
438 jchar* position = value->char_at_addr(offset + start);
439 return UNICODE::as_utf8(position, len, buf, buflen);
440 }
441
442 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
443 assert(java_string->klass() == SystemDictionary::String_klass(),
444 "must be java_string");
445 typeArrayOop value = java_lang_String::value(java_string);
446 int offset = java_lang_String::offset(java_string);
447 int length = java_lang_String::length(java_string);
448 if (length != len) {
449 return false;
450 }
451 for (int i = 0; i < len; i++) {
452 if (value->char_at(i + offset) != chars[i]) {
453 return false;
454 }
455 }
456 return true;
457 }
458
459 bool java_lang_String::equals(oop str1, oop str2) {
460 assert(str1->klass() == SystemDictionary::String_klass(),
461 "must be java String");
462 assert(str2->klass() == SystemDictionary::String_klass(),
463 "must be java String");
464 typeArrayOop value1 = java_lang_String::value(str1);
465 int offset1 = java_lang_String::offset(str1);
466 int length1 = java_lang_String::length(str1);
467 typeArrayOop value2 = java_lang_String::value(str2);
468 int offset2 = java_lang_String::offset(str2);
469 int length2 = java_lang_String::length(str2);
470
471 if (length1 != length2) {
472 return false;
473 }
474 for (int i = 0; i < length1; i++) {
475 if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) {
476 return false;
477 }
478 }
479 return true;
480 }
481
482 void java_lang_String::print(oop java_string, outputStream* st) {
483 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
484 typeArrayOop value = java_lang_String::value(java_string);
485
486 if (value == NULL) {
487 // This can happen if, e.g., printing a String
488 // object before its initializer has been called
489 st->print("NULL");
490 return;
491 }
492
493 int offset = java_lang_String::offset(java_string);
494 int length = java_lang_String::length(java_string);
495
496 st->print("\"");
497 for (int index = 0; index < length; index++) {
498 st->print("%c", value->char_at(index + offset));
499 }
500 st->print("\"");
501 }
502
503
504 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
505 assert(mirror.not_null() && fd->is_static(), "just checking");
506 if (fd->has_initial_value()) {
507 BasicType t = fd->field_type();
508 switch (t) {
509 case T_BYTE:
510 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
511 break;
512 case T_BOOLEAN:
513 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
514 break;
515 case T_CHAR:
516 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
517 break;
518 case T_SHORT:
519 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
520 break;
521 case T_INT:
522 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
523 break;
524 case T_FLOAT:
525 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
526 break;
527 case T_DOUBLE:
528 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
529 break;
530 case T_LONG:
531 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
532 break;
533 case T_OBJECT:
534 {
535 #ifdef ASSERT
536 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
537 assert(fd->signature() == sym, "just checking");
538 #endif
539 oop string = fd->string_initial_value(CHECK);
540 mirror()->obj_field_put(fd->offset(), string);
541 }
542 break;
543 default:
544 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
545 "Illegal ConstantValue attribute in class file");
546 }
547 }
548 }
549
550
551 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) {
552 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
553
554 // If the offset was read from the shared archive, it was fixed up already
555 if (!k->is_shared()) {
556 if (k->oop_is_instance()) {
557 // During bootstrap, java.lang.Class wasn't loaded so static field
558 // offsets were computed without the size added it. Go back and
559 // update all the static field offsets to included the size.
560 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) {
561 if (fs.access_flags().is_static()) {
562 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
563 fs.set_offset(real_offset);
564 }
565 }
566 }
567 }
568 create_mirror(k, Handle(NULL), Handle(NULL), CHECK);
569 }
570
571 void java_lang_Class::initialize_mirror_fields(KlassHandle k,
572 Handle mirror,
573 Handle protection_domain,
574 TRAPS) {
575 // Allocate a simple java object for a lock.
576 // This needs to be a java object because during class initialization
577 // it can be held across a java call.
578 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
579 set_init_lock(mirror(), r);
580
581 // Set protection domain also
582 set_protection_domain(mirror(), protection_domain());
583
584 // Initialize static fields
585 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK);
586 }
587
588 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader,
589 Handle protection_domain, TRAPS) {
590 assert(k->java_mirror() == NULL, "should only assign mirror once");
591 // Use this moment of initialization to cache modifier_flags also,
592 // to support Class.getModifiers(). Instance classes recalculate
593 // the cached flags after the class file is parsed, but before the
594 // class is put into the system dictionary.
595 int computed_modifiers = k->compute_modifier_flags(CHECK);
596 k->set_modifier_flags(computed_modifiers);
597 // Class_klass has to be loaded because it is used to allocate
598 // the mirror.
599 if (SystemDictionary::Class_klass_loaded()) {
600 // Allocate mirror (java.lang.Class instance)
601 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
602
603 // Setup indirection from mirror->klass
604 if (!k.is_null()) {
605 java_lang_Class::set_klass(mirror(), k());
606 }
607
608 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
609 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
610
611 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
612
613 // It might also have a component mirror. This mirror must already exist.
614 if (k->oop_is_array()) {
615 Handle comp_mirror;
616 if (k->oop_is_typeArray()) {
617 BasicType type = TypeArrayKlass::cast(k())->element_type();
618 comp_mirror = Universe::java_mirror(type);
619 } else {
620 assert(k->oop_is_objArray(), "Must be");
621 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass();
622 assert(element_klass != NULL, "Must have an element klass");
623 comp_mirror = element_klass->java_mirror();
624 }
625 assert(comp_mirror.not_null(), "must have a mirror");
626
627 // Two-way link between the array klass and its component mirror:
628 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
629 set_component_mirror(mirror(), comp_mirror());
630 set_array_klass(comp_mirror(), k());
631 } else {
632 assert(k->oop_is_instance(), "Must be");
633
634 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
635 if (HAS_PENDING_EXCEPTION) {
636 // If any of the fields throws an exception like OOM remove the klass field
637 // from the mirror so GC doesn't follow it after the klass has been deallocated.
638 // This mirror looks like a primitive type, which logically it is because it
639 // it represents no class.
640 java_lang_Class::set_klass(mirror(), NULL);
641 return;
642 }
643 }
644
645 // set the classLoader field in the java_lang_Class instance
646 assert(class_loader() == k->class_loader(), "should be same");
647 set_class_loader(mirror(), class_loader());
648
649 // Setup indirection from klass->mirror last
650 // after any exceptions can happen during allocations.
651 if (!k.is_null()) {
652 k->set_java_mirror(mirror());
653 }
654 } else {
655 if (fixup_mirror_list() == NULL) {
656 GrowableArray<Klass*>* list =
657 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
658 set_fixup_mirror_list(list);
659 }
660 fixup_mirror_list()->push(k());
661 }
662 }
663
664
665 int java_lang_Class::oop_size(oop java_class) {
666 assert(_oop_size_offset != 0, "must be set");
667 return java_class->int_field(_oop_size_offset);
668 }
669 void java_lang_Class::set_oop_size(oop java_class, int size) {
670 assert(_oop_size_offset != 0, "must be set");
671 java_class->int_field_put(_oop_size_offset, size);
672 }
673 int java_lang_Class::static_oop_field_count(oop java_class) {
674 assert(_static_oop_field_count_offset != 0, "must be set");
675 return java_class->int_field(_static_oop_field_count_offset);
676 }
677 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
678 assert(_static_oop_field_count_offset != 0, "must be set");
679 java_class->int_field_put(_static_oop_field_count_offset, size);
680 }
681
682 oop java_lang_Class::protection_domain(oop java_class) {
683 assert(_protection_domain_offset != 0, "must be set");
684 return java_class->obj_field(_protection_domain_offset);
685 }
686 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
687 assert(_protection_domain_offset != 0, "must be set");
688 java_class->obj_field_put(_protection_domain_offset, pd);
689 }
690
691 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
692 assert(_component_mirror_offset != 0, "must be set");
693 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
694 }
695 oop java_lang_Class::component_mirror(oop java_class) {
696 assert(_component_mirror_offset != 0, "must be set");
697 return java_class->obj_field(_component_mirror_offset);
698 }
699
700 oop java_lang_Class::init_lock(oop java_class) {
701 assert(_init_lock_offset != 0, "must be set");
702 return java_class->obj_field(_init_lock_offset);
703 }
704 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
705 assert(_init_lock_offset != 0, "must be set");
706 java_class->obj_field_put(_init_lock_offset, init_lock);
707 }
708
709 objArrayOop java_lang_Class::signers(oop java_class) {
710 assert(_signers_offset != 0, "must be set");
711 return (objArrayOop)java_class->obj_field(_signers_offset);
712 }
713 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
714 assert(_signers_offset != 0, "must be set");
715 java_class->obj_field_put(_signers_offset, (oop)signers);
716 }
717
718
719 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
720 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
721 if (_class_loader_offset != 0) {
722 java_class->obj_field_put(_class_loader_offset, loader);
723 }
724 }
725
726 oop java_lang_Class::class_loader(oop java_class) {
727 assert(_class_loader_offset != 0, "must be set");
728 return java_class->obj_field(_class_loader_offset);
729 }
730
731 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
732 // This should be improved by adding a field at the Java level or by
733 // introducing a new VM klass (see comment in ClassFileParser)
734 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
735 if (type != T_VOID) {
736 Klass* aklass = Universe::typeArrayKlassObj(type);
737 assert(aklass != NULL, "correct bootstrap");
738 set_array_klass(java_class, aklass);
739 }
740 #ifdef ASSERT
741 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
742 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
743 #endif
744 return java_class;
745 }
746
747
748 Klass* java_lang_Class::as_Klass(oop java_class) {
749 //%note memory_2
750 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
751 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
752 assert(k == NULL || k->is_klass(), "type check");
753 return k;
754 }
755
756
757 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
758 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
759 java_class->metadata_field_put(_klass_offset, klass);
760 }
761
762
763 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
764 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
765 Symbol* name = NULL;
766 bool is_instance = false;
767 if (is_primitive(java_class)) {
768 name = vmSymbols::type_signature(primitive_type(java_class));
769 } else {
770 Klass* k = as_Klass(java_class);
771 is_instance = k->oop_is_instance();
772 name = k->name();
773 }
774 if (name == NULL) {
775 st->print("<null>");
776 return;
777 }
778 if (is_instance) st->print("L");
779 st->write((char*) name->base(), (int) name->utf8_length());
780 if (is_instance) st->print(";");
781 }
782
783 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
784 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
785 Symbol* name;
786 if (is_primitive(java_class)) {
787 name = vmSymbols::type_signature(primitive_type(java_class));
788 // Because this can create a new symbol, the caller has to decrement
789 // the refcount, so make adjustment here and below for symbols returned
790 // that are not created or incremented due to a successful lookup.
791 name->increment_refcount();
792 } else {
793 Klass* k = as_Klass(java_class);
794 if (!k->oop_is_instance()) {
795 name = k->name();
796 name->increment_refcount();
797 } else {
798 ResourceMark rm;
799 const char* sigstr = k->signature_name();
800 int siglen = (int) strlen(sigstr);
801 if (!intern_if_not_found) {
802 name = SymbolTable::probe(sigstr, siglen);
803 } else {
804 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
805 }
806 }
807 }
808 return name;
809 }
810
811
812 Klass* java_lang_Class::array_klass(oop java_class) {
813 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
814 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass");
815 return k;
816 }
817
818
819 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
820 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass");
821 java_class->metadata_field_put(_array_klass_offset, klass);
822 }
823
824
825 bool java_lang_Class::is_primitive(oop java_class) {
826 // should assert:
827 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
828 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
829
830 #ifdef ASSERT
831 if (is_primitive) {
832 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
833 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
834 "Should be either the T_VOID primitive or a java primitive");
835 }
836 #endif
837
838 return is_primitive;
839 }
840
841
842 BasicType java_lang_Class::primitive_type(oop java_class) {
843 assert(java_lang_Class::is_primitive(java_class), "just checking");
844 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
845 BasicType type = T_VOID;
846 if (ak != NULL) {
847 // Note: create_basic_type_mirror above initializes ak to a non-null value.
848 type = ArrayKlass::cast(ak)->element_type();
849 } else {
850 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
851 }
852 assert(Universe::java_mirror(type) == java_class, "must be consistent");
853 return type;
854 }
855
856 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
857 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
858 if (is_primitive(java_class)) {
859 if (reference_klass != NULL)
860 (*reference_klass) = NULL;
861 return primitive_type(java_class);
862 } else {
863 if (reference_klass != NULL)
864 (*reference_klass) = as_Klass(java_class);
865 return T_OBJECT;
866 }
867 }
868
869
870 oop java_lang_Class::primitive_mirror(BasicType t) {
871 oop mirror = Universe::java_mirror(t);
872 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
873 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
874 return mirror;
875 }
876
877 bool java_lang_Class::offsets_computed = false;
878 int java_lang_Class::classRedefinedCount_offset = -1;
879
880 void java_lang_Class::compute_offsets() {
881 assert(!offsets_computed, "offsets should be initialized only once");
882 offsets_computed = true;
883
884 Klass* k = SystemDictionary::Class_klass();
885 // The classRedefinedCount field is only present starting in 1.5,
886 // so don't go fatal.
887 compute_optional_offset(classRedefinedCount_offset,
888 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
889
890 // Needs to be optional because the old build runs Queens during bootstrapping
891 // and jdk8-9 doesn't have coordinated pushes yet.
892 compute_optional_offset(_class_loader_offset,
893 k, vmSymbols::classLoader_name(),
894 vmSymbols::classloader_signature());
895
896 compute_offset(_component_mirror_offset,
897 k, vmSymbols::componentType_name(),
898 vmSymbols::class_signature());
899
900 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
901 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
902 // GC treats them the same.
903 _init_lock_offset = _component_mirror_offset;
904
905 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
906 }
907
908 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
909 if (classRedefinedCount_offset == -1) {
910 // If we don't have an offset for it then just return -1 as a marker.
911 return -1;
912 }
913
914 return the_class_mirror->int_field(classRedefinedCount_offset);
915 }
916
917 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
918 if (classRedefinedCount_offset == -1) {
919 // If we don't have an offset for it then nothing to set.
920 return;
921 }
922
923 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
924 }
925
926
927 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
928 // platform thread structure, and a eetop offset which was used for thread
929 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
930 // merged, so in the HotSpot VM we just use the eetop field for the thread
931 // instead of the privateInfo_offset.
932 //
933 // Note: The stackSize field is only present starting in 1.4.
934
935 int java_lang_Thread::_name_offset = 0;
936 int java_lang_Thread::_group_offset = 0;
937 int java_lang_Thread::_contextClassLoader_offset = 0;
938 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
939 int java_lang_Thread::_priority_offset = 0;
940 int java_lang_Thread::_eetop_offset = 0;
941 int java_lang_Thread::_daemon_offset = 0;
942 int java_lang_Thread::_stillborn_offset = 0;
943 int java_lang_Thread::_stackSize_offset = 0;
944 int java_lang_Thread::_tid_offset = 0;
945 int java_lang_Thread::_thread_status_offset = 0;
946 int java_lang_Thread::_park_blocker_offset = 0;
947 int java_lang_Thread::_park_event_offset = 0 ;
948
949
950 void java_lang_Thread::compute_offsets() {
951 assert(_group_offset == 0, "offsets should be initialized only once");
952
953 Klass* k = SystemDictionary::Thread_klass();
954 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
955 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
956 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
957 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
958 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
959 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
960 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
961 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
962 // The stackSize field is only present starting in 1.4, so don't go fatal.
963 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
964 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
965 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
966 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
967 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
968 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
969 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
970 vmSymbols::long_signature());
971 }
972
973
974 JavaThread* java_lang_Thread::thread(oop java_thread) {
975 return (JavaThread*)java_thread->address_field(_eetop_offset);
976 }
977
978
979 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
980 java_thread->address_field_put(_eetop_offset, (address)thread);
981 }
982
983
984 oop java_lang_Thread::name(oop java_thread) {
985 return java_thread->obj_field(_name_offset);
986 }
987
988
989 void java_lang_Thread::set_name(oop java_thread, oop name) {
990 java_thread->obj_field_put(_name_offset, name);
991 }
992
993
994 ThreadPriority java_lang_Thread::priority(oop java_thread) {
995 return (ThreadPriority)java_thread->int_field(_priority_offset);
996 }
997
998
999 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1000 java_thread->int_field_put(_priority_offset, priority);
1001 }
1002
1003
1004 oop java_lang_Thread::threadGroup(oop java_thread) {
1005 return java_thread->obj_field(_group_offset);
1006 }
1007
1008
1009 bool java_lang_Thread::is_stillborn(oop java_thread) {
1010 return java_thread->bool_field(_stillborn_offset) != 0;
1011 }
1012
1013
1014 // We never have reason to turn the stillborn bit off
1015 void java_lang_Thread::set_stillborn(oop java_thread) {
1016 java_thread->bool_field_put(_stillborn_offset, true);
1017 }
1018
1019
1020 bool java_lang_Thread::is_alive(oop java_thread) {
1021 JavaThread* thr = java_lang_Thread::thread(java_thread);
1022 return (thr != NULL);
1023 }
1024
1025
1026 bool java_lang_Thread::is_daemon(oop java_thread) {
1027 return java_thread->bool_field(_daemon_offset) != 0;
1028 }
1029
1030
1031 void java_lang_Thread::set_daemon(oop java_thread) {
1032 java_thread->bool_field_put(_daemon_offset, true);
1033 }
1034
1035 oop java_lang_Thread::context_class_loader(oop java_thread) {
1036 return java_thread->obj_field(_contextClassLoader_offset);
1037 }
1038
1039 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1040 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1041 }
1042
1043
1044 jlong java_lang_Thread::stackSize(oop java_thread) {
1045 if (_stackSize_offset > 0) {
1046 return java_thread->long_field(_stackSize_offset);
1047 } else {
1048 return 0;
1049 }
1050 }
1051
1052 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1053 void java_lang_Thread::set_thread_status(oop java_thread,
1054 java_lang_Thread::ThreadStatus status) {
1055 // The threadStatus is only present starting in 1.5
1056 if (_thread_status_offset > 0) {
1057 java_thread->int_field_put(_thread_status_offset, status);
1058 }
1059 }
1060
1061 // Read thread status value from threadStatus field in java.lang.Thread java class.
1062 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1063 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() ||
1064 JavaThread::current()->thread_state() == _thread_in_vm,
1065 "Java Thread is not running in vm");
1066 // The threadStatus is only present starting in 1.5
1067 if (_thread_status_offset > 0) {
1068 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1069 } else {
1070 // All we can easily figure out is if it is alive, but that is
1071 // enough info for a valid unknown status.
1072 // These aren't restricted to valid set ThreadStatus values, so
1073 // use JVMTI values and cast.
1074 JavaThread* thr = java_lang_Thread::thread(java_thread);
1075 if (thr == NULL) {
1076 // the thread hasn't run yet or is in the process of exiting
1077 return NEW;
1078 }
1079 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1080 }
1081 }
1082
1083
1084 jlong java_lang_Thread::thread_id(oop java_thread) {
1085 // The thread ID field is only present starting in 1.5
1086 if (_tid_offset > 0) {
1087 return java_thread->long_field(_tid_offset);
1088 } else {
1089 return 0;
1090 }
1091 }
1092
1093 oop java_lang_Thread::park_blocker(oop java_thread) {
1094 assert(JDK_Version::current().supports_thread_park_blocker() &&
1095 _park_blocker_offset != 0, "Must support parkBlocker field");
1096
1097 if (_park_blocker_offset > 0) {
1098 return java_thread->obj_field(_park_blocker_offset);
1099 }
1100
1101 return NULL;
1102 }
1103
1104 jlong java_lang_Thread::park_event(oop java_thread) {
1105 if (_park_event_offset > 0) {
1106 return java_thread->long_field(_park_event_offset);
1107 }
1108 return 0;
1109 }
1110
1111 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1112 if (_park_event_offset > 0) {
1113 java_thread->long_field_put(_park_event_offset, ptr);
1114 return true;
1115 }
1116 return false;
1117 }
1118
1119
1120 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1121 assert(_thread_status_offset != 0, "Must have thread status");
1122 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1123 switch (status) {
1124 case NEW : return "NEW";
1125 case RUNNABLE : return "RUNNABLE";
1126 case SLEEPING : return "TIMED_WAITING (sleeping)";
1127 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1128 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1129 case PARKED : return "WAITING (parking)";
1130 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1131 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1132 case TERMINATED : return "TERMINATED";
1133 default : return "UNKNOWN";
1134 };
1135 }
1136 int java_lang_ThreadGroup::_parent_offset = 0;
1137 int java_lang_ThreadGroup::_name_offset = 0;
1138 int java_lang_ThreadGroup::_threads_offset = 0;
1139 int java_lang_ThreadGroup::_groups_offset = 0;
1140 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1141 int java_lang_ThreadGroup::_destroyed_offset = 0;
1142 int java_lang_ThreadGroup::_daemon_offset = 0;
1143 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
1144 int java_lang_ThreadGroup::_nthreads_offset = 0;
1145 int java_lang_ThreadGroup::_ngroups_offset = 0;
1146
1147 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1148 assert(java_thread_group->is_oop(), "thread group must be oop");
1149 return java_thread_group->obj_field(_parent_offset);
1150 }
1151
1152 // ("name as oop" accessor is not necessary)
1153
1154 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
1155 oop name = java_thread_group->obj_field(_name_offset);
1156 // ThreadGroup.name can be null
1157 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
1158 }
1159
1160 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1161 assert(java_thread_group->is_oop(), "thread group must be oop");
1162 return java_thread_group->int_field(_nthreads_offset);
1163 }
1164
1165 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1166 oop threads = java_thread_group->obj_field(_threads_offset);
1167 assert(threads != NULL, "threadgroups should have threads");
1168 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1169 return objArrayOop(threads);
1170 }
1171
1172 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1173 assert(java_thread_group->is_oop(), "thread group must be oop");
1174 return java_thread_group->int_field(_ngroups_offset);
1175 }
1176
1177 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1178 oop groups = java_thread_group->obj_field(_groups_offset);
1179 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1180 return objArrayOop(groups);
1181 }
1182
1183 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1184 assert(java_thread_group->is_oop(), "thread group must be oop");
1185 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1186 }
1187
1188 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1189 assert(java_thread_group->is_oop(), "thread group must be oop");
1190 return java_thread_group->bool_field(_destroyed_offset) != 0;
1191 }
1192
1193 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1194 assert(java_thread_group->is_oop(), "thread group must be oop");
1195 return java_thread_group->bool_field(_daemon_offset) != 0;
1196 }
1197
1198 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1199 assert(java_thread_group->is_oop(), "thread group must be oop");
1200 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1201 }
1202
1203 void java_lang_ThreadGroup::compute_offsets() {
1204 assert(_parent_offset == 0, "offsets should be initialized only once");
1205
1206 Klass* k = SystemDictionary::ThreadGroup_klass();
1207
1208 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1209 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1210 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1211 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1212 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1213 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1214 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1215 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1216 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1217 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1218 }
1219
1220 oop java_lang_Throwable::unassigned_stacktrace() {
1221 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass());
1222 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1223 if (UseCompressedOops) {
1224 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1225 } else {
1226 return oopDesc::load_decode_heap_oop((oop*)addr);
1227 }
1228 }
1229
1230 oop java_lang_Throwable::backtrace(oop throwable) {
1231 return throwable->obj_field_acquire(backtrace_offset);
1232 }
1233
1234
1235 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1236 throwable->release_obj_field_put(backtrace_offset, value);
1237 }
1238
1239
1240 oop java_lang_Throwable::message(oop throwable) {
1241 return throwable->obj_field(detailMessage_offset);
1242 }
1243
1244
1245 oop java_lang_Throwable::message(Handle throwable) {
1246 return throwable->obj_field(detailMessage_offset);
1247 }
1248
1249
1250 // Return Symbol for detailed_message or NULL
1251 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1252 PRESERVE_EXCEPTION_MARK; // Keep original exception
1253 oop detailed_message = java_lang_Throwable::message(throwable);
1254 if (detailed_message != NULL) {
1255 return java_lang_String::as_symbol(detailed_message, THREAD);
1256 }
1257 return NULL;
1258 }
1259
1260 void java_lang_Throwable::set_message(oop throwable, oop value) {
1261 throwable->obj_field_put(detailMessage_offset, value);
1262 }
1263
1264
1265 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1266 throwable->obj_field_put(stackTrace_offset, st_element_array);
1267 }
1268
1269 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1270 set_stacktrace(throwable, NULL);
1271 }
1272
1273
1274 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1275 ResourceMark rm;
1276 Klass* k = throwable->klass();
1277 assert(k != NULL, "just checking");
1278 st->print("%s", InstanceKlass::cast(k)->external_name());
1279 oop msg = message(throwable);
1280 if (msg != NULL) {
1281 st->print(": %s", java_lang_String::as_utf8_string(msg));
1282 }
1283 }
1284
1285
1286 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1287 ResourceMark rm;
1288 Klass* k = throwable->klass();
1289 assert(k != NULL, "just checking");
1290 st->print("%s", InstanceKlass::cast(k)->external_name());
1291 oop msg = message(throwable);
1292 if (msg != NULL) {
1293 st->print(": %s", java_lang_String::as_utf8_string(msg));
1294 }
1295 }
1296
1297 // After this many redefines, the stack trace is unreliable.
1298 const int MAX_VERSION = USHRT_MAX;
1299
1300 // Helper backtrace functions to store bci|version together.
1301 static inline int merge_bci_and_version(int bci, int version) {
1302 // only store u2 for version, checking for overflow.
1303 if (version > USHRT_MAX || version < 0) version = MAX_VERSION;
1304 assert((jushort)bci == bci, "bci should be short");
1305 return build_int_from_shorts(version, bci);
1306 }
1307
1308 static inline int bci_at(unsigned int merged) {
1309 return extract_high_short_from_int(merged);
1310 }
1311 static inline int version_at(unsigned int merged) {
1312 return extract_low_short_from_int(merged);
1313 }
1314
1315 static inline bool version_matches(Method* method, int version) {
1316 assert(version < MAX_VERSION, "version is too big");
1317 return method != NULL && (method->constants()->version() == version);
1318 }
1319
1320 static inline int get_line_number(Method* method, int bci) {
1321 int line_number = 0;
1322 if (method->is_native()) {
1323 // Negative value different from -1 below, enabling Java code in
1324 // class java.lang.StackTraceElement to distinguish "native" from
1325 // "no LineNumberTable". JDK tests for -2.
1326 line_number = -2;
1327 } else {
1328 // Returns -1 if no LineNumberTable, and otherwise actual line number
1329 line_number = method->line_number_from_bci(bci);
1330 if (line_number == -1 && ShowHiddenFrames) {
1331 line_number = bci + 1000000;
1332 }
1333 }
1334 return line_number;
1335 }
1336
1337 // This class provides a simple wrapper over the internal structure of
1338 // exception backtrace to insulate users of the backtrace from needing
1339 // to know what it looks like.
1340 class BacktraceBuilder: public StackObj {
1341 private:
1342 Handle _backtrace;
1343 objArrayOop _head;
1344 typeArrayOop _methods;
1345 typeArrayOop _bcis;
1346 objArrayOop _mirrors;
1347 typeArrayOop _cprefs; // needed to insulate method name against redefinition
1348 int _index;
1349 No_Safepoint_Verifier _nsv;
1350
1351 public:
1352
1353 enum {
1354 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1355 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1356 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1357 trace_cprefs_offset = java_lang_Throwable::trace_cprefs_offset,
1358 trace_next_offset = java_lang_Throwable::trace_next_offset,
1359 trace_size = java_lang_Throwable::trace_size,
1360 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1361 };
1362
1363 // get info out of chunks
1364 static typeArrayOop get_methods(objArrayHandle chunk) {
1365 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1366 assert(methods != NULL, "method array should be initialized in backtrace");
1367 return methods;
1368 }
1369 static typeArrayOop get_bcis(objArrayHandle chunk) {
1370 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1371 assert(bcis != NULL, "bci array should be initialized in backtrace");
1372 return bcis;
1373 }
1374 static objArrayOop get_mirrors(objArrayHandle chunk) {
1375 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1376 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1377 return mirrors;
1378 }
1379 static typeArrayOop get_cprefs(objArrayHandle chunk) {
1380 typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset));
1381 assert(cprefs != NULL, "cprefs array should be initialized in backtrace");
1382 return cprefs;
1383 }
1384
1385 // constructor for new backtrace
1386 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) {
1387 expand(CHECK);
1388 _backtrace = _head;
1389 _index = 0;
1390 }
1391
1392 BacktraceBuilder(objArrayHandle backtrace) {
1393 _methods = get_methods(backtrace);
1394 _bcis = get_bcis(backtrace);
1395 _mirrors = get_mirrors(backtrace);
1396 _cprefs = get_cprefs(backtrace);
1397 assert(_methods->length() == _bcis->length() &&
1398 _methods->length() == _mirrors->length(),
1399 "method and source information arrays should match");
1400
1401 // head is the preallocated backtrace
1402 _backtrace = _head = backtrace();
1403 _index = 0;
1404 }
1405
1406 void expand(TRAPS) {
1407 objArrayHandle old_head(THREAD, _head);
1408 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1409
1410 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1411 objArrayHandle new_head(THREAD, head);
1412
1413 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1414 typeArrayHandle new_methods(THREAD, methods);
1415
1416 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1417 typeArrayHandle new_bcis(THREAD, bcis);
1418
1419 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1420 objArrayHandle new_mirrors(THREAD, mirrors);
1421
1422 typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1423 typeArrayHandle new_cprefs(THREAD, cprefs);
1424
1425 if (!old_head.is_null()) {
1426 old_head->obj_at_put(trace_next_offset, new_head());
1427 }
1428 new_head->obj_at_put(trace_methods_offset, new_methods());
1429 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1430 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1431 new_head->obj_at_put(trace_cprefs_offset, new_cprefs());
1432
1433 _head = new_head();
1434 _methods = new_methods();
1435 _bcis = new_bcis();
1436 _mirrors = new_mirrors();
1437 _cprefs = new_cprefs();
1438 _index = 0;
1439 }
1440
1441 oop backtrace() {
1442 return _backtrace();
1443 }
1444
1445 inline void push(Method* method, int bci, TRAPS) {
1446 // Smear the -1 bci to 0 since the array only holds unsigned
1447 // shorts. The later line number lookup would just smear the -1
1448 // to a 0 even if it could be recorded.
1449 if (bci == SynchronizationEntryBCI) bci = 0;
1450
1451 if (_index >= trace_chunk_size) {
1452 methodHandle mhandle(THREAD, method);
1453 expand(CHECK);
1454 method = mhandle();
1455 }
1456
1457 _methods->short_at_put(_index, method->orig_method_idnum());
1458 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version()));
1459 _cprefs->short_at_put(_index, method->name_index());
1460
1461 // We need to save the mirrors in the backtrace to keep the class
1462 // from being unloaded while we still have this stack trace.
1463 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1464 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1465 _index++;
1466 }
1467
1468 };
1469
1470 // Print stack trace element to resource allocated buffer
1471 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
1472 int method_id, int version, int bci, int cpref) {
1473
1474 // Get strings and string lengths
1475 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1476 const char* klass_name = holder->external_name();
1477 int buf_len = (int)strlen(klass_name);
1478
1479 Method* method = holder->method_with_orig_idnum(method_id, version);
1480
1481 // The method can be NULL if the requested class version is gone
1482 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1483 char* method_name = sym->as_C_string();
1484 buf_len += (int)strlen(method_name);
1485
1486 // Use specific ik version as a holder since the mirror might
1487 // refer to version that is now obsolete and no longer accessible
1488 // via the previous versions list.
1489 holder = holder->get_klass_version(version);
1490 char* source_file_name = NULL;
1491 if (holder != NULL) {
1492 Symbol* source = holder->source_file_name();
1493 if (source != NULL) {
1494 source_file_name = source->as_C_string();
1495 buf_len += (int)strlen(source_file_name);
1496 }
1497 }
1498
1499 // Allocate temporary buffer with extra space for formatting and line number
1500 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1501
1502 // Print stack trace line in buffer
1503 sprintf(buf, "\tat %s.%s", klass_name, method_name);
1504
1505 if (!version_matches(method, version)) {
1506 strcat(buf, "(Redefined)");
1507 } else {
1508 int line_number = get_line_number(method, bci);
1509 if (line_number == -2) {
1510 strcat(buf, "(Native Method)");
1511 } else {
1512 if (source_file_name != NULL && (line_number != -1)) {
1513 // Sourcename and linenumber
1514 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1515 } else if (source_file_name != NULL) {
1516 // Just sourcename
1517 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1518 } else {
1519 // Neither sourcename nor linenumber
1520 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1521 }
1522 nmethod* nm = method->code();
1523 if (WizardMode && nm != NULL) {
1524 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1525 }
1526 }
1527 }
1528
1529 return buf;
1530 }
1531
1532 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror,
1533 int method_id, int version, int bci, int cpref) {
1534 ResourceMark rm;
1535 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci, cpref);
1536 st->print_cr("%s", buf);
1537 }
1538
1539 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) {
1540 Handle mirror = method->method_holder()->java_mirror();
1541 int method_id = method->orig_method_idnum();
1542 int version = method->constants()->version();
1543 int cpref = method->name_index();
1544 print_stack_element(st, mirror, method_id, version, bci, cpref);
1545 }
1546
1547 const char* java_lang_Throwable::no_stack_trace_message() {
1548 return "\t<<no stack trace available>>";
1549 }
1550
1551
1552 // Currently used only for exceptions occurring during startup
1553 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1554 Thread *THREAD = Thread::current();
1555 Handle h_throwable(THREAD, throwable);
1556 while (h_throwable.not_null()) {
1557 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1558 if (result.is_null()) {
1559 st->print_cr("%s", no_stack_trace_message());
1560 return;
1561 }
1562
1563 while (result.not_null()) {
1564
1565 // Get method id, bci, version and mirror from chunk
1566 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result));
1567 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result));
1568 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result));
1569 typeArrayHandle cprefs (THREAD, BacktraceBuilder::get_cprefs(result));
1570
1571 int length = methods()->length();
1572 for (int index = 0; index < length; index++) {
1573 Handle mirror(THREAD, mirrors->obj_at(index));
1574 // NULL mirror means end of stack trace
1575 if (mirror.is_null()) goto handle_cause;
1576 int method = methods->short_at(index);
1577 int version = version_at(bcis->int_at(index));
1578 int bci = bci_at(bcis->int_at(index));
1579 int cpref = cprefs->short_at(index);
1580 print_stack_element(st, mirror, method, version, bci, cpref);
1581 }
1582 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1583 }
1584 handle_cause:
1585 {
1586 EXCEPTION_MARK;
1587 JavaValue cause(T_OBJECT);
1588 JavaCalls::call_virtual(&cause,
1589 h_throwable,
1590 KlassHandle(THREAD, h_throwable->klass()),
1591 vmSymbols::getCause_name(),
1592 vmSymbols::void_throwable_signature(),
1593 THREAD);
1594 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1595 if (HAS_PENDING_EXCEPTION) {
1596 CLEAR_PENDING_EXCEPTION;
1597 h_throwable = Handle();
1598 } else {
1599 h_throwable = Handle(THREAD, (oop) cause.get_jobject());
1600 if (h_throwable.not_null()) {
1601 st->print("Caused by: ");
1602 print(h_throwable, st);
1603 st->cr();
1604 }
1605 }
1606 }
1607 }
1608 }
1609
1610 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) {
1611 if (!StackTraceInThrowable) return;
1612 ResourceMark rm(THREAD);
1613
1614 // Start out by clearing the backtrace for this object, in case the VM
1615 // runs out of memory while allocating the stack trace
1616 set_backtrace(throwable(), NULL);
1617 // Clear lazily constructed Java level stacktrace if refilling occurs
1618 // This is unnecessary in 1.7+ but harmless
1619 clear_stacktrace(throwable());
1620
1621 int max_depth = MaxJavaStackTraceDepth;
1622 JavaThread* thread = (JavaThread*)THREAD;
1623 BacktraceBuilder bt(CHECK);
1624
1625 // If there is no Java frame just return the method that was being called
1626 // with bci 0
1627 if (!thread->has_last_Java_frame()) {
1628 if (max_depth >= 1 && method() != NULL) {
1629 bt.push(method(), 0, CHECK);
1630 set_backtrace(throwable(), bt.backtrace());
1631 }
1632 return;
1633 }
1634
1635 // Instead of using vframe directly, this version of fill_in_stack_trace
1636 // basically handles everything by hand. This significantly improved the
1637 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1638 // See bug 6333838 for more details.
1639 // The "ASSERT" here is to verify this method generates the exactly same stack
1640 // trace as utilizing vframe.
1641 #ifdef ASSERT
1642 vframeStream st(thread);
1643 methodHandle st_method(THREAD, st.method());
1644 #endif
1645 int total_count = 0;
1646 RegisterMap map(thread, false);
1647 int decode_offset = 0;
1648 nmethod* nm = NULL;
1649 bool skip_fillInStackTrace_check = false;
1650 bool skip_throwableInit_check = false;
1651 bool skip_hidden = !ShowHiddenFrames;
1652
1653 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1654 Method* method = NULL;
1655 int bci = 0;
1656
1657 // Compiled java method case.
1658 if (decode_offset != 0) {
1659 DebugInfoReadStream stream(nm, decode_offset);
1660 decode_offset = stream.read_int();
1661 method = (Method*)nm->metadata_at(stream.read_int());
1662 bci = stream.read_bci();
1663 } else {
1664 if (fr.is_first_frame()) break;
1665 address pc = fr.pc();
1666 if (fr.is_interpreted_frame()) {
1667 address bcp = fr.interpreter_frame_bcp();
1668 method = fr.interpreter_frame_method();
1669 bci = method->bci_from(bcp);
1670 fr = fr.sender(&map);
1671 } else {
1672 CodeBlob* cb = fr.cb();
1673 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1674 // but non nmethod
1675 fr = fr.sender(&map);
1676 if (cb == NULL || !cb->is_nmethod()) {
1677 continue;
1678 }
1679 nm = (nmethod*)cb;
1680 if (nm->method()->is_native()) {
1681 method = nm->method();
1682 bci = 0;
1683 } else {
1684 PcDesc* pd = nm->pc_desc_at(pc);
1685 decode_offset = pd->scope_decode_offset();
1686 // if decode_offset is not equal to 0, it will execute the
1687 // "compiled java method case" at the beginning of the loop.
1688 continue;
1689 }
1690 }
1691 }
1692 #ifdef ASSERT
1693 assert(st_method() == method && st.bci() == bci,
1694 "Wrong stack trace");
1695 st.next();
1696 // vframeStream::method isn't GC-safe so store off a copy
1697 // of the Method* in case we GC.
1698 if (!st.at_end()) {
1699 st_method = st.method();
1700 }
1701 #endif
1702
1703 // the format of the stacktrace will be:
1704 // - 1 or more fillInStackTrace frames for the exception class (skipped)
1705 // - 0 or more <init> methods for the exception class (skipped)
1706 // - rest of the stack
1707
1708 if (!skip_fillInStackTrace_check) {
1709 if ((method->name() == vmSymbols::fillInStackTrace_name() ||
1710 method->name() == vmSymbols::fillInStackTrace0_name()) &&
1711 throwable->is_a(method->method_holder())) {
1712 continue;
1713 }
1714 else {
1715 skip_fillInStackTrace_check = true; // gone past them all
1716 }
1717 }
1718 if (!skip_throwableInit_check) {
1719 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1720
1721 // skip <init> methods of the exception class and superclasses
1722 // This is simlar to classic VM.
1723 if (method->name() == vmSymbols::object_initializer_name() &&
1724 throwable->is_a(method->method_holder())) {
1725 continue;
1726 } else {
1727 // there are none or we've seen them all - either way stop checking
1728 skip_throwableInit_check = true;
1729 }
1730 }
1731 if (method->is_hidden()) {
1732 if (skip_hidden) continue;
1733 }
1734 bt.push(method, bci, CHECK);
1735 total_count++;
1736 }
1737
1738 // Put completed stack trace into throwable object
1739 set_backtrace(throwable(), bt.backtrace());
1740 }
1741
1742 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) {
1743 // No-op if stack trace is disabled
1744 if (!StackTraceInThrowable) {
1745 return;
1746 }
1747
1748 // Disable stack traces for some preallocated out of memory errors
1749 if (!Universe::should_fill_in_stack_trace(throwable)) {
1750 return;
1751 }
1752
1753 PRESERVE_EXCEPTION_MARK;
1754
1755 JavaThread* thread = JavaThread::active();
1756 fill_in_stack_trace(throwable, method, thread);
1757 // ignore exceptions thrown during stack trace filling
1758 CLEAR_PENDING_EXCEPTION;
1759 }
1760
1761 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1762 // Allocate stack trace - backtrace is created but not filled in
1763
1764 // No-op if stack trace is disabled
1765 if (!StackTraceInThrowable) return;
1766 BacktraceBuilder bt(CHECK); // creates a backtrace
1767 set_backtrace(throwable(), bt.backtrace());
1768 }
1769
1770
1771 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1772 // Fill in stack trace into preallocated backtrace (no GC)
1773
1774 // No-op if stack trace is disabled
1775 if (!StackTraceInThrowable) return;
1776
1777 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1778
1779 JavaThread* THREAD = JavaThread::current();
1780
1781 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
1782 assert(backtrace.not_null(), "backtrace should have been preallocated");
1783
1784 ResourceMark rm(THREAD);
1785 vframeStream st(THREAD);
1786
1787 BacktraceBuilder bt(backtrace);
1788
1789 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1790 // methods as preallocated errors aren't created by "java" code.
1791
1792 // fill in as much stack trace as possible
1793 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace);
1794 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1795 int chunk_count = 0;
1796
1797 for (;!st.at_end(); st.next()) {
1798 bt.push(st.method(), st.bci(), CHECK);
1799 chunk_count++;
1800
1801 // Bail-out for deep stacks
1802 if (chunk_count >= max_chunks) break;
1803 }
1804
1805 // We support the Throwable immutability protocol defined for Java 7.
1806 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
1807 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
1808 }
1809
1810
1811 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1812 if (throwable == NULL) {
1813 THROW_0(vmSymbols::java_lang_NullPointerException());
1814 }
1815 objArrayOop chunk = objArrayOop(backtrace(throwable));
1816 int depth = 0;
1817 if (chunk != NULL) {
1818 // Iterate over chunks and count full ones
1819 while (true) {
1820 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1821 if (next == NULL) break;
1822 depth += trace_chunk_size;
1823 chunk = next;
1824 }
1825 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1826 // Count element in remaining partial chunk. NULL value for mirror
1827 // marks the end of the stack trace elements that are saved.
1828 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1829 assert(mirrors != NULL, "sanity check");
1830 for (int i = 0; i < mirrors->length(); i++) {
1831 if (mirrors->obj_at(i) == NULL) break;
1832 depth++;
1833 }
1834 }
1835 return depth;
1836 }
1837
1838
1839 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1840 if (throwable == NULL) {
1841 THROW_0(vmSymbols::java_lang_NullPointerException());
1842 }
1843 if (index < 0) {
1844 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1845 }
1846 // Compute how many chunks to skip and index into actual chunk
1847 objArrayOop chunk = objArrayOop(backtrace(throwable));
1848 int skip_chunks = index / trace_chunk_size;
1849 int chunk_index = index % trace_chunk_size;
1850 while (chunk != NULL && skip_chunks > 0) {
1851 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1852 skip_chunks--;
1853 }
1854 if (chunk == NULL) {
1855 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1856 }
1857 // Get method id, bci, version, mirror and cpref from chunk
1858 typeArrayOop methods = BacktraceBuilder::get_methods(chunk);
1859 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk);
1860 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1861 typeArrayOop cprefs = BacktraceBuilder::get_cprefs(chunk);
1862
1863 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check");
1864
1865 int method = methods->short_at(chunk_index);
1866 int version = version_at(bcis->int_at(chunk_index));
1867 int bci = bci_at(bcis->int_at(chunk_index));
1868 int cpref = cprefs->short_at(chunk_index);
1869 Handle mirror(THREAD, mirrors->obj_at(chunk_index));
1870
1871 // Chunk can be partial full
1872 if (mirror.is_null()) {
1873 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1874 }
1875 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, cpref, CHECK_0);
1876 return element;
1877 }
1878
1879 oop java_lang_StackTraceElement::create(Handle mirror, int method_id,
1880 int version, int bci, int cpref, TRAPS) {
1881 // Allocate java.lang.StackTraceElement instance
1882 Klass* k = SystemDictionary::StackTraceElement_klass();
1883 assert(k != NULL, "must be loaded in 1.4+");
1884 instanceKlassHandle ik (THREAD, k);
1885 if (ik->should_be_initialized()) {
1886 ik->initialize(CHECK_0);
1887 }
1888
1889 Handle element = ik->allocate_instance_handle(CHECK_0);
1890 // Fill in class name
1891 ResourceMark rm(THREAD);
1892 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1893 const char* str = holder->external_name();
1894 oop classname = StringTable::intern((char*) str, CHECK_0);
1895 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1896
1897 Method* method = holder->method_with_orig_idnum(method_id, version);
1898
1899 // The method can be NULL if the requested class version is gone
1900 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1901
1902 // Fill in method name
1903 oop methodname = StringTable::intern(sym, CHECK_0);
1904 java_lang_StackTraceElement::set_methodName(element(), methodname);
1905
1906 if (!version_matches(method, version)) {
1907 // The method was redefined, accurate line number information isn't available
1908 java_lang_StackTraceElement::set_fileName(element(), NULL);
1909 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1910 } else {
1911 // Fill in source file name and line number.
1912 // Use specific ik version as a holder since the mirror might
1913 // refer to version that is now obsolete and no longer accessible
1914 // via the previous versions list.
1915 holder = holder->get_klass_version(version);
1916 assert(holder != NULL, "sanity check");
1917 Symbol* source = holder->source_file_name();
1918 if (ShowHiddenFrames && source == NULL)
1919 source = vmSymbols::unknown_class_name();
1920 oop filename = StringTable::intern(source, CHECK_0);
1921 java_lang_StackTraceElement::set_fileName(element(), filename);
1922
1923 int line_number = get_line_number(method, bci);
1924 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1925 }
1926 return element();
1927 }
1928
1929 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1930 Handle mirror (THREAD, method->method_holder()->java_mirror());
1931 int method_id = method->orig_method_idnum();
1932 int cpref = method->name_index();
1933 return create(mirror, method_id, method->constants()->version(), bci, cpref, THREAD);
1934 }
1935
1936 void java_lang_reflect_AccessibleObject::compute_offsets() {
1937 Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
1938 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1939 }
1940
1941 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1942 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1943 return (jboolean) reflect->bool_field(override_offset);
1944 }
1945
1946 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1947 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1948 reflect->bool_field_put(override_offset, (int) value);
1949 }
1950
1951 void java_lang_reflect_Method::compute_offsets() {
1952 Klass* k = SystemDictionary::reflect_Method_klass();
1953 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1954 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1955 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1956 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1957 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1958 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1959 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1960 // The generic signature and annotations fields are only present in 1.5
1961 signature_offset = -1;
1962 annotations_offset = -1;
1963 parameter_annotations_offset = -1;
1964 annotation_default_offset = -1;
1965 type_annotations_offset = -1;
1966 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1967 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1968 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1969 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1970 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
1971 }
1972
1973 Handle java_lang_reflect_Method::create(TRAPS) {
1974 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1975 Klass* klass = SystemDictionary::reflect_Method_klass();
1976 // This class is eagerly initialized during VM initialization, since we keep a refence
1977 // to one of the methods
1978 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
1979 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
1980 }
1981
1982 oop java_lang_reflect_Method::clazz(oop reflect) {
1983 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1984 return reflect->obj_field(clazz_offset);
1985 }
1986
1987 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1988 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1989 reflect->obj_field_put(clazz_offset, value);
1990 }
1991
1992 int java_lang_reflect_Method::slot(oop reflect) {
1993 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1994 return reflect->int_field(slot_offset);
1995 }
1996
1997 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1998 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1999 reflect->int_field_put(slot_offset, value);
2000 }
2001
2002 oop java_lang_reflect_Method::name(oop method) {
2003 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2004 return method->obj_field(name_offset);
2005 }
2006
2007 void java_lang_reflect_Method::set_name(oop method, oop value) {
2008 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2009 method->obj_field_put(name_offset, value);
2010 }
2011
2012 oop java_lang_reflect_Method::return_type(oop method) {
2013 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2014 return method->obj_field(returnType_offset);
2015 }
2016
2017 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2018 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2019 method->obj_field_put(returnType_offset, value);
2020 }
2021
2022 oop java_lang_reflect_Method::parameter_types(oop method) {
2023 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2024 return method->obj_field(parameterTypes_offset);
2025 }
2026
2027 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2028 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2029 method->obj_field_put(parameterTypes_offset, value);
2030 }
2031
2032 oop java_lang_reflect_Method::exception_types(oop method) {
2033 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2034 return method->obj_field(exceptionTypes_offset);
2035 }
2036
2037 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2038 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2039 method->obj_field_put(exceptionTypes_offset, value);
2040 }
2041
2042 int java_lang_reflect_Method::modifiers(oop method) {
2043 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2044 return method->int_field(modifiers_offset);
2045 }
2046
2047 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2048 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2049 method->int_field_put(modifiers_offset, value);
2050 }
2051
2052 bool java_lang_reflect_Method::has_signature_field() {
2053 return (signature_offset >= 0);
2054 }
2055
2056 oop java_lang_reflect_Method::signature(oop method) {
2057 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2058 assert(has_signature_field(), "signature field must be present");
2059 return method->obj_field(signature_offset);
2060 }
2061
2062 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2063 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2064 assert(has_signature_field(), "signature field must be present");
2065 method->obj_field_put(signature_offset, value);
2066 }
2067
2068 bool java_lang_reflect_Method::has_annotations_field() {
2069 return (annotations_offset >= 0);
2070 }
2071
2072 oop java_lang_reflect_Method::annotations(oop method) {
2073 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2074 assert(has_annotations_field(), "annotations field must be present");
2075 return method->obj_field(annotations_offset);
2076 }
2077
2078 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2079 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2080 assert(has_annotations_field(), "annotations field must be present");
2081 method->obj_field_put(annotations_offset, value);
2082 }
2083
2084 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2085 return (parameter_annotations_offset >= 0);
2086 }
2087
2088 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2089 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2090 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2091 return method->obj_field(parameter_annotations_offset);
2092 }
2093
2094 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2095 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2096 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2097 method->obj_field_put(parameter_annotations_offset, value);
2098 }
2099
2100 bool java_lang_reflect_Method::has_annotation_default_field() {
2101 return (annotation_default_offset >= 0);
2102 }
2103
2104 oop java_lang_reflect_Method::annotation_default(oop method) {
2105 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2106 assert(has_annotation_default_field(), "annotation default field must be present");
2107 return method->obj_field(annotation_default_offset);
2108 }
2109
2110 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2111 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2112 assert(has_annotation_default_field(), "annotation default field must be present");
2113 method->obj_field_put(annotation_default_offset, value);
2114 }
2115
2116 bool java_lang_reflect_Method::has_type_annotations_field() {
2117 return (type_annotations_offset >= 0);
2118 }
2119
2120 oop java_lang_reflect_Method::type_annotations(oop method) {
2121 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2122 assert(has_type_annotations_field(), "type_annotations field must be present");
2123 return method->obj_field(type_annotations_offset);
2124 }
2125
2126 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2127 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2128 assert(has_type_annotations_field(), "type_annotations field must be present");
2129 method->obj_field_put(type_annotations_offset, value);
2130 }
2131
2132 void java_lang_reflect_Constructor::compute_offsets() {
2133 Klass* k = SystemDictionary::reflect_Constructor_klass();
2134 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2135 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2136 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2137 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2138 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2139 // The generic signature and annotations fields are only present in 1.5
2140 signature_offset = -1;
2141 annotations_offset = -1;
2142 parameter_annotations_offset = -1;
2143 type_annotations_offset = -1;
2144 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2145 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2146 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2147 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2148 }
2149
2150 Handle java_lang_reflect_Constructor::create(TRAPS) {
2151 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2152 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2153 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2154 instanceKlassHandle klass (THREAD, k);
2155 // Ensure it is initialized
2156 klass->initialize(CHECK_NH);
2157 return klass->allocate_instance_handle(THREAD);
2158 }
2159
2160 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2161 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2162 return reflect->obj_field(clazz_offset);
2163 }
2164
2165 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2166 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2167 reflect->obj_field_put(clazz_offset, value);
2168 }
2169
2170 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2171 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2172 return constructor->obj_field(parameterTypes_offset);
2173 }
2174
2175 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2176 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2177 constructor->obj_field_put(parameterTypes_offset, value);
2178 }
2179
2180 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2181 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2182 return constructor->obj_field(exceptionTypes_offset);
2183 }
2184
2185 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2186 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2187 constructor->obj_field_put(exceptionTypes_offset, value);
2188 }
2189
2190 int java_lang_reflect_Constructor::slot(oop reflect) {
2191 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2192 return reflect->int_field(slot_offset);
2193 }
2194
2195 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2196 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2197 reflect->int_field_put(slot_offset, value);
2198 }
2199
2200 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2201 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2202 return constructor->int_field(modifiers_offset);
2203 }
2204
2205 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2206 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2207 constructor->int_field_put(modifiers_offset, value);
2208 }
2209
2210 bool java_lang_reflect_Constructor::has_signature_field() {
2211 return (signature_offset >= 0);
2212 }
2213
2214 oop java_lang_reflect_Constructor::signature(oop constructor) {
2215 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2216 assert(has_signature_field(), "signature field must be present");
2217 return constructor->obj_field(signature_offset);
2218 }
2219
2220 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2221 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2222 assert(has_signature_field(), "signature field must be present");
2223 constructor->obj_field_put(signature_offset, value);
2224 }
2225
2226 bool java_lang_reflect_Constructor::has_annotations_field() {
2227 return (annotations_offset >= 0);
2228 }
2229
2230 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2231 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2232 assert(has_annotations_field(), "annotations field must be present");
2233 return constructor->obj_field(annotations_offset);
2234 }
2235
2236 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2237 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2238 assert(has_annotations_field(), "annotations field must be present");
2239 constructor->obj_field_put(annotations_offset, value);
2240 }
2241
2242 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2243 return (parameter_annotations_offset >= 0);
2244 }
2245
2246 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2247 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2248 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2249 return method->obj_field(parameter_annotations_offset);
2250 }
2251
2252 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2253 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2254 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2255 method->obj_field_put(parameter_annotations_offset, value);
2256 }
2257
2258 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2259 return (type_annotations_offset >= 0);
2260 }
2261
2262 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2263 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2264 assert(has_type_annotations_field(), "type_annotations field must be present");
2265 return constructor->obj_field(type_annotations_offset);
2266 }
2267
2268 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2269 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2270 assert(has_type_annotations_field(), "type_annotations field must be present");
2271 constructor->obj_field_put(type_annotations_offset, value);
2272 }
2273
2274 void java_lang_reflect_Field::compute_offsets() {
2275 Klass* k = SystemDictionary::reflect_Field_klass();
2276 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2277 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2278 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
2279 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2280 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2281 // The generic signature and annotations fields are only present in 1.5
2282 signature_offset = -1;
2283 annotations_offset = -1;
2284 type_annotations_offset = -1;
2285 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2286 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2287 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2288 }
2289
2290 Handle java_lang_reflect_Field::create(TRAPS) {
2291 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2292 Symbol* name = vmSymbols::java_lang_reflect_Field();
2293 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2294 instanceKlassHandle klass (THREAD, k);
2295 // Ensure it is initialized
2296 klass->initialize(CHECK_NH);
2297 return klass->allocate_instance_handle(THREAD);
2298 }
2299
2300 oop java_lang_reflect_Field::clazz(oop reflect) {
2301 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2302 return reflect->obj_field(clazz_offset);
2303 }
2304
2305 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2306 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2307 reflect->obj_field_put(clazz_offset, value);
2308 }
2309
2310 oop java_lang_reflect_Field::name(oop field) {
2311 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2312 return field->obj_field(name_offset);
2313 }
2314
2315 void java_lang_reflect_Field::set_name(oop field, oop value) {
2316 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2317 field->obj_field_put(name_offset, value);
2318 }
2319
2320 oop java_lang_reflect_Field::type(oop field) {
2321 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2322 return field->obj_field(type_offset);
2323 }
2324
2325 void java_lang_reflect_Field::set_type(oop field, oop value) {
2326 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2327 field->obj_field_put(type_offset, value);
2328 }
2329
2330 int java_lang_reflect_Field::slot(oop reflect) {
2331 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2332 return reflect->int_field(slot_offset);
2333 }
2334
2335 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2336 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2337 reflect->int_field_put(slot_offset, value);
2338 }
2339
2340 int java_lang_reflect_Field::modifiers(oop field) {
2341 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2342 return field->int_field(modifiers_offset);
2343 }
2344
2345 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2346 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2347 field->int_field_put(modifiers_offset, value);
2348 }
2349
2350 bool java_lang_reflect_Field::has_signature_field() {
2351 return (signature_offset >= 0);
2352 }
2353
2354 oop java_lang_reflect_Field::signature(oop field) {
2355 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2356 assert(has_signature_field(), "signature field must be present");
2357 return field->obj_field(signature_offset);
2358 }
2359
2360 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2361 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2362 assert(has_signature_field(), "signature field must be present");
2363 field->obj_field_put(signature_offset, value);
2364 }
2365
2366 bool java_lang_reflect_Field::has_annotations_field() {
2367 return (annotations_offset >= 0);
2368 }
2369
2370 oop java_lang_reflect_Field::annotations(oop field) {
2371 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2372 assert(has_annotations_field(), "annotations field must be present");
2373 return field->obj_field(annotations_offset);
2374 }
2375
2376 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2377 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2378 assert(has_annotations_field(), "annotations field must be present");
2379 field->obj_field_put(annotations_offset, value);
2380 }
2381
2382 bool java_lang_reflect_Field::has_type_annotations_field() {
2383 return (type_annotations_offset >= 0);
2384 }
2385
2386 oop java_lang_reflect_Field::type_annotations(oop field) {
2387 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2388 assert(has_type_annotations_field(), "type_annotations field must be present");
2389 return field->obj_field(type_annotations_offset);
2390 }
2391
2392 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2393 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2394 assert(has_type_annotations_field(), "type_annotations field must be present");
2395 field->obj_field_put(type_annotations_offset, value);
2396 }
2397
2398 void sun_reflect_ConstantPool::compute_offsets() {
2399 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2400 // This null test can be removed post beta
2401 if (k != NULL) {
2402 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2403 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2404 }
2405 }
2406
2407 void java_lang_reflect_Parameter::compute_offsets() {
2408 Klass* k = SystemDictionary::reflect_Parameter_klass();
2409 if(NULL != k) {
2410 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2411 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2412 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature());
2413 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature());
2414 }
2415 }
2416
2417 Handle java_lang_reflect_Parameter::create(TRAPS) {
2418 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2419 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2420 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2421 instanceKlassHandle klass (THREAD, k);
2422 // Ensure it is initialized
2423 klass->initialize(CHECK_NH);
2424 return klass->allocate_instance_handle(THREAD);
2425 }
2426
2427 oop java_lang_reflect_Parameter::name(oop param) {
2428 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2429 return param->obj_field(name_offset);
2430 }
2431
2432 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2433 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2434 param->obj_field_put(name_offset, value);
2435 }
2436
2437 int java_lang_reflect_Parameter::modifiers(oop param) {
2438 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2439 return param->int_field(modifiers_offset);
2440 }
2441
2442 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2443 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2444 param->int_field_put(modifiers_offset, value);
2445 }
2446
2447 int java_lang_reflect_Parameter::index(oop param) {
2448 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2449 return param->int_field(index_offset);
2450 }
2451
2452 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2453 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2454 param->int_field_put(index_offset, value);
2455 }
2456
2457 oop java_lang_reflect_Parameter::executable(oop param) {
2458 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2459 return param->obj_field(executable_offset);
2460 }
2461
2462 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2463 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2464 param->obj_field_put(executable_offset, value);
2465 }
2466
2467
2468 Handle sun_reflect_ConstantPool::create(TRAPS) {
2469 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2470 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2471 instanceKlassHandle klass (THREAD, k);
2472 // Ensure it is initialized
2473 klass->initialize(CHECK_NH);
2474 return klass->allocate_instance_handle(THREAD);
2475 }
2476
2477
2478 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2479 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2480 oop mirror = value->pool_holder()->java_mirror();
2481 // Save the mirror to get back the constant pool.
2482 reflect->obj_field_put(_oop_offset, mirror);
2483 }
2484
2485 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) {
2486 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2487
2488 oop mirror = reflect->obj_field(_oop_offset);
2489 Klass* k = java_lang_Class::as_Klass(mirror);
2490 assert(k->oop_is_instance(), "Must be");
2491
2492 // Get the constant pool back from the klass. Since class redefinition
2493 // merges the new constant pool into the old, this is essentially the
2494 // same constant pool as the original. If constant pool merging is
2495 // no longer done in the future, this will have to change to save
2496 // the original.
2497 return InstanceKlass::cast(k)->constants();
2498 }
2499
2500 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2501 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2502 // This null test can be removed post beta
2503 if (k != NULL) {
2504 compute_offset(_base_offset, k,
2505 vmSymbols::base_name(), vmSymbols::object_signature());
2506 }
2507 }
2508
2509 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2510 Klass* k = SystemDictionary::box_klass(type);
2511 if (k == NULL) return NULL;
2512 instanceKlassHandle h (THREAD, k);
2513 if (!h->is_initialized()) h->initialize(CHECK_0);
2514 return h->allocate_instance(THREAD);
2515 }
2516
2517
2518 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2519 oop box = initialize_and_allocate(type, CHECK_0);
2520 if (box == NULL) return NULL;
2521 switch (type) {
2522 case T_BOOLEAN:
2523 box->bool_field_put(value_offset, value->z);
2524 break;
2525 case T_CHAR:
2526 box->char_field_put(value_offset, value->c);
2527 break;
2528 case T_FLOAT:
2529 box->float_field_put(value_offset, value->f);
2530 break;
2531 case T_DOUBLE:
2532 box->double_field_put(long_value_offset, value->d);
2533 break;
2534 case T_BYTE:
2535 box->byte_field_put(value_offset, value->b);
2536 break;
2537 case T_SHORT:
2538 box->short_field_put(value_offset, value->s);
2539 break;
2540 case T_INT:
2541 box->int_field_put(value_offset, value->i);
2542 break;
2543 case T_LONG:
2544 box->long_field_put(long_value_offset, value->j);
2545 break;
2546 default:
2547 return NULL;
2548 }
2549 return box;
2550 }
2551
2552
2553 BasicType java_lang_boxing_object::basic_type(oop box) {
2554 if (box == NULL) return T_ILLEGAL;
2555 BasicType type = SystemDictionary::box_klass_type(box->klass());
2556 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2557 return T_ILLEGAL;
2558 return type;
2559 }
2560
2561
2562 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2563 BasicType type = SystemDictionary::box_klass_type(box->klass());
2564 switch (type) {
2565 case T_BOOLEAN:
2566 value->z = box->bool_field(value_offset);
2567 break;
2568 case T_CHAR:
2569 value->c = box->char_field(value_offset);
2570 break;
2571 case T_FLOAT:
2572 value->f = box->float_field(value_offset);
2573 break;
2574 case T_DOUBLE:
2575 value->d = box->double_field(long_value_offset);
2576 break;
2577 case T_BYTE:
2578 value->b = box->byte_field(value_offset);
2579 break;
2580 case T_SHORT:
2581 value->s = box->short_field(value_offset);
2582 break;
2583 case T_INT:
2584 value->i = box->int_field(value_offset);
2585 break;
2586 case T_LONG:
2587 value->j = box->long_field(long_value_offset);
2588 break;
2589 default:
2590 return T_ILLEGAL;
2591 } // end switch
2592 return type;
2593 }
2594
2595
2596 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2597 BasicType type = SystemDictionary::box_klass_type(box->klass());
2598 switch (type) {
2599 case T_BOOLEAN:
2600 box->bool_field_put(value_offset, value->z);
2601 break;
2602 case T_CHAR:
2603 box->char_field_put(value_offset, value->c);
2604 break;
2605 case T_FLOAT:
2606 box->float_field_put(value_offset, value->f);
2607 break;
2608 case T_DOUBLE:
2609 box->double_field_put(long_value_offset, value->d);
2610 break;
2611 case T_BYTE:
2612 box->byte_field_put(value_offset, value->b);
2613 break;
2614 case T_SHORT:
2615 box->short_field_put(value_offset, value->s);
2616 break;
2617 case T_INT:
2618 box->int_field_put(value_offset, value->i);
2619 break;
2620 case T_LONG:
2621 box->long_field_put(long_value_offset, value->j);
2622 break;
2623 default:
2624 return T_ILLEGAL;
2625 } // end switch
2626 return type;
2627 }
2628
2629
2630 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2631 switch (type) {
2632 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2633 case T_CHAR: st->print("%d", value->c); break;
2634 case T_BYTE: st->print("%d", value->b); break;
2635 case T_SHORT: st->print("%d", value->s); break;
2636 case T_INT: st->print("%d", value->i); break;
2637 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2638 case T_FLOAT: st->print("%f", value->f); break;
2639 case T_DOUBLE: st->print("%lf", value->d); break;
2640 default: st->print("type %d?", type); break;
2641 }
2642 }
2643
2644
2645 // Support for java_lang_ref_Reference
2646 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() {
2647 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2648 address addr = ik->static_field_addr(static_lock_offset);
2649 return (HeapWord*) addr;
2650 }
2651
2652 oop java_lang_ref_Reference::pending_list_lock() {
2653 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2654 address addr = ik->static_field_addr(static_lock_offset);
2655 if (UseCompressedOops) {
2656 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2657 } else {
2658 return oopDesc::load_decode_heap_oop((oop*)addr);
2659 }
2660 }
2661
2662 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2663 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2664 address addr = ik->static_field_addr(static_pending_offset);
2665 // XXX This might not be HeapWord aligned, almost rather be char *.
2666 return (HeapWord*)addr;
2667 }
2668
2669 oop java_lang_ref_Reference::pending_list() {
2670 char *addr = (char *)pending_list_addr();
2671 if (UseCompressedOops) {
2672 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2673 } else {
2674 return oopDesc::load_decode_heap_oop((oop*)addr);
2675 }
2676 }
2677
2678
2679 // Support for java_lang_ref_SoftReference
2680
2681 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2682 return ref->long_field(timestamp_offset);
2683 }
2684
2685 jlong java_lang_ref_SoftReference::clock() {
2686 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2687 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2688 return *offset;
2689 }
2690
2691 void java_lang_ref_SoftReference::set_clock(jlong value) {
2692 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2693 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2694 *offset = value;
2695 }
2696
2697 // Support for java_lang_invoke_DirectMethodHandle
2698
2699 int java_lang_invoke_DirectMethodHandle::_member_offset;
2700
2701 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
2702 oop member_name = NULL;
2703 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
2704 assert(is_dmh, "a DirectMethodHandle oop is expected");
2705 if (is_dmh) {
2706 member_name = dmh->obj_field(member_offset_in_bytes());
2707 }
2708 return member_name;
2709 }
2710
2711 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
2712 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
2713 if (klass_oop != NULL) {
2714 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2715 }
2716 }
2717
2718 // Support for java_lang_invoke_MethodHandle
2719
2720 int java_lang_invoke_MethodHandle::_type_offset;
2721 int java_lang_invoke_MethodHandle::_form_offset;
2722
2723 int java_lang_invoke_MemberName::_clazz_offset;
2724 int java_lang_invoke_MemberName::_name_offset;
2725 int java_lang_invoke_MemberName::_type_offset;
2726 int java_lang_invoke_MemberName::_flags_offset;
2727 int java_lang_invoke_MemberName::_vmtarget_offset;
2728 int java_lang_invoke_MemberName::_vmloader_offset;
2729 int java_lang_invoke_MemberName::_vmindex_offset;
2730
2731 int java_lang_invoke_LambdaForm::_vmentry_offset;
2732
2733 void java_lang_invoke_MethodHandle::compute_offsets() {
2734 Klass* klass_oop = SystemDictionary::MethodHandle_klass();
2735 if (klass_oop != NULL) {
2736 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
2737 compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
2738 }
2739 }
2740
2741 void java_lang_invoke_MemberName::compute_offsets() {
2742 Klass* klass_oop = SystemDictionary::MemberName_klass();
2743 if (klass_oop != NULL) {
2744 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature());
2745 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature());
2746 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature());
2747 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature());
2748 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2749 }
2750 }
2751
2752 void java_lang_invoke_LambdaForm::compute_offsets() {
2753 Klass* klass_oop = SystemDictionary::LambdaForm_klass();
2754 if (klass_oop != NULL) {
2755 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2756 }
2757 }
2758
2759 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
2760 return obj != NULL && is_subclass(obj->klass());
2761 }
2762
2763
2764 oop java_lang_invoke_MethodHandle::type(oop mh) {
2765 return mh->obj_field(_type_offset);
2766 }
2767
2768 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
2769 mh->obj_field_put(_type_offset, mtype);
2770 }
2771
2772 oop java_lang_invoke_MethodHandle::form(oop mh) {
2773 assert(_form_offset != 0, "");
2774 return mh->obj_field(_form_offset);
2775 }
2776
2777 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
2778 assert(_form_offset != 0, "");
2779 mh->obj_field_put(_form_offset, lform);
2780 }
2781
2782 /// MemberName accessors
2783
2784 oop java_lang_invoke_MemberName::clazz(oop mname) {
2785 assert(is_instance(mname), "wrong type");
2786 return mname->obj_field(_clazz_offset);
2787 }
2788
2789 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
2790 assert(is_instance(mname), "wrong type");
2791 mname->obj_field_put(_clazz_offset, clazz);
2792 }
2793
2794 oop java_lang_invoke_MemberName::name(oop mname) {
2795 assert(is_instance(mname), "wrong type");
2796 return mname->obj_field(_name_offset);
2797 }
2798
2799 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
2800 assert(is_instance(mname), "wrong type");
2801 mname->obj_field_put(_name_offset, name);
2802 }
2803
2804 oop java_lang_invoke_MemberName::type(oop mname) {
2805 assert(is_instance(mname), "wrong type");
2806 return mname->obj_field(_type_offset);
2807 }
2808
2809 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
2810 assert(is_instance(mname), "wrong type");
2811 mname->obj_field_put(_type_offset, type);
2812 }
2813
2814 int java_lang_invoke_MemberName::flags(oop mname) {
2815 assert(is_instance(mname), "wrong type");
2816 return mname->int_field(_flags_offset);
2817 }
2818
2819 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
2820 assert(is_instance(mname), "wrong type");
2821 mname->int_field_put(_flags_offset, flags);
2822 }
2823
2824 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
2825 assert(is_instance(mname), "wrong type");
2826 return (Metadata*)mname->address_field(_vmtarget_offset);
2827 }
2828
2829 bool java_lang_invoke_MemberName::is_method(oop mname) {
2830 assert(is_instance(mname), "must be MemberName");
2831 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
2832 }
2833
2834 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
2835 assert(is_instance(mname), "wrong type");
2836 // check the type of the vmtarget
2837 oop dependency = NULL;
2838 if (ref != NULL) {
2839 switch (flags(mname) & (MN_IS_METHOD |
2840 MN_IS_CONSTRUCTOR |
2841 MN_IS_FIELD)) {
2842 case MN_IS_METHOD:
2843 case MN_IS_CONSTRUCTOR:
2844 assert(ref->is_method(), "should be a method");
2845 dependency = ((Method*)ref)->method_holder()->java_mirror();
2846 break;
2847 case MN_IS_FIELD:
2848 assert(ref->is_klass(), "should be a class");
2849 dependency = ((Klass*)ref)->java_mirror();
2850 break;
2851 default:
2852 ShouldNotReachHere();
2853 }
2854 }
2855 mname->address_field_put(_vmtarget_offset, (address)ref);
2856 // Add a reference to the loader (actually mirror because anonymous classes will not have
2857 // distinct loaders) to ensure the metadata is kept alive
2858 // This mirror may be different than the one in clazz field.
2859 mname->obj_field_put(_vmloader_offset, dependency);
2860 }
2861
2862 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
2863 assert(is_instance(mname), "wrong type");
2864 return (intptr_t) mname->address_field(_vmindex_offset);
2865 }
2866
2867 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
2868 assert(is_instance(mname), "wrong type");
2869 mname->address_field_put(_vmindex_offset, (address) index);
2870 }
2871
2872 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
2873 assert(is_instance(lform), "wrong type");
2874 return lform->obj_field(_vmentry_offset);
2875 }
2876
2877
2878 // Support for java_lang_invoke_MethodType
2879
2880 int java_lang_invoke_MethodType::_rtype_offset;
2881 int java_lang_invoke_MethodType::_ptypes_offset;
2882
2883 void java_lang_invoke_MethodType::compute_offsets() {
2884 Klass* k = SystemDictionary::MethodType_klass();
2885 if (k != NULL) {
2886 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2887 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2888 }
2889 }
2890
2891 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
2892 st->print("(");
2893 objArrayOop pts = ptypes(mt);
2894 for (int i = 0, limit = pts->length(); i < limit; i++) {
2895 java_lang_Class::print_signature(pts->obj_at(i), st);
2896 }
2897 st->print(")");
2898 java_lang_Class::print_signature(rtype(mt), st);
2899 }
2900
2901 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2902 ResourceMark rm;
2903 stringStream buffer(128);
2904 print_signature(mt, &buffer);
2905 const char* sigstr = buffer.base();
2906 int siglen = (int) buffer.size();
2907 Symbol *name;
2908 if (!intern_if_not_found) {
2909 name = SymbolTable::probe(sigstr, siglen);
2910 } else {
2911 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2912 }
2913 return name;
2914 }
2915
2916 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
2917 if (mt1 == mt2)
2918 return true;
2919 if (rtype(mt1) != rtype(mt2))
2920 return false;
2921 if (ptype_count(mt1) != ptype_count(mt2))
2922 return false;
2923 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
2924 if (ptype(mt1, i) != ptype(mt2, i))
2925 return false;
2926 }
2927 return true;
2928 }
2929
2930 oop java_lang_invoke_MethodType::rtype(oop mt) {
2931 assert(is_instance(mt), "must be a MethodType");
2932 return mt->obj_field(_rtype_offset);
2933 }
2934
2935 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
2936 assert(is_instance(mt), "must be a MethodType");
2937 return (objArrayOop) mt->obj_field(_ptypes_offset);
2938 }
2939
2940 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
2941 return ptypes(mt)->obj_at(idx);
2942 }
2943
2944 int java_lang_invoke_MethodType::ptype_count(oop mt) {
2945 return ptypes(mt)->length();
2946 }
2947
2948 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
2949 objArrayOop pts = ptypes(mt);
2950 int count = pts->length();
2951 int slots = 0;
2952 for (int i = 0; i < count; i++) {
2953 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
2954 slots += type2size[bt];
2955 }
2956 return slots;
2957 }
2958
2959 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
2960 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
2961 return type2size[bt];
2962 }
2963
2964
2965 // Support for java_lang_invoke_CallSite
2966
2967 int java_lang_invoke_CallSite::_target_offset;
2968
2969 void java_lang_invoke_CallSite::compute_offsets() {
2970 Klass* k = SystemDictionary::CallSite_klass();
2971 if (k != NULL) {
2972 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
2973 }
2974 }
2975
2976
2977 // Support for java_security_AccessControlContext
2978
2979 int java_security_AccessControlContext::_context_offset = 0;
2980 int java_security_AccessControlContext::_privilegedContext_offset = 0;
2981 int java_security_AccessControlContext::_isPrivileged_offset = 0;
2982 int java_security_AccessControlContext::_isAuthorized_offset = -1;
2983
2984 void java_security_AccessControlContext::compute_offsets() {
2985 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
2986 fieldDescriptor fd;
2987 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass());
2988
2989 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
2990 fatal("Invalid layout of java.security.AccessControlContext");
2991 }
2992 _context_offset = fd.offset();
2993
2994 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
2995 fatal("Invalid layout of java.security.AccessControlContext");
2996 }
2997 _privilegedContext_offset = fd.offset();
2998
2999 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
3000 fatal("Invalid layout of java.security.AccessControlContext");
3001 }
3002 _isPrivileged_offset = fd.offset();
3003
3004 // The offset may not be present for bootstrapping with older JDK.
3005 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
3006 _isAuthorized_offset = fd.offset();
3007 }
3008 }
3009
3010
3011 bool java_security_AccessControlContext::is_authorized(Handle context) {
3012 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
3013 assert(_isAuthorized_offset != -1, "should be set");
3014 return context->bool_field(_isAuthorized_offset) != 0;
3015 }
3016
3017 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3018 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3019 // Ensure klass is initialized
3020 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
3021 // Allocate result
3022 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
3023 // Fill in values
3024 result->obj_field_put(_context_offset, context());
3025 result->obj_field_put(_privilegedContext_offset, privileged_context());
3026 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3027 // whitelist AccessControlContexts created by the JVM if present
3028 if (_isAuthorized_offset != -1) {
3029 result->bool_field_put(_isAuthorized_offset, true);
3030 }
3031 return result;
3032 }
3033
3034
3035 // Support for java_lang_ClassLoader
3036
3037 bool java_lang_ClassLoader::offsets_computed = false;
3038 int java_lang_ClassLoader::_loader_data_offset = -1;
3039 int java_lang_ClassLoader::parallelCapable_offset = -1;
3040
3041 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
3042 assert(loader != NULL && loader->is_oop(), "loader must be oop");
3043 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
3044 }
3045
3046 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
3047 return *java_lang_ClassLoader::loader_data_addr(loader);
3048 }
3049
3050 void java_lang_ClassLoader::compute_offsets() {
3051 assert(!offsets_computed, "offsets should be initialized only once");
3052 offsets_computed = true;
3053
3054 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
3055 Klass* k1 = SystemDictionary::ClassLoader_klass();
3056 compute_optional_offset(parallelCapable_offset,
3057 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
3058
3059 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3060 }
3061
3062 oop java_lang_ClassLoader::parent(oop loader) {
3063 assert(is_instance(loader), "loader must be oop");
3064 return loader->obj_field(parent_offset);
3065 }
3066
3067 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3068 assert(is_instance(loader), "loader must be oop");
3069 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3070 oop acl = loader;
3071 debug_only(jint loop_count = 0);
3072 // This loop taken verbatim from ClassLoader.java:
3073 do {
3074 acl = parent(acl);
3075 if (cl == acl) {
3076 return true;
3077 }
3078 assert(++loop_count > 0, "loop_count overflow");
3079 } while (acl != NULL);
3080 return false;
3081 }
3082
3083 bool java_lang_ClassLoader::is_instance(oop obj) {
3084 return obj != NULL && is_subclass(obj->klass());
3085 }
3086
3087
3088 // For class loader classes, parallelCapable defined
3089 // based on non-null field
3090 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3091 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3092 if (parallelCapable_offset == -1) {
3093 // Default for backward compatibility is false
3094 return false;
3095 }
3096 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3097 }
3098
3099 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3100 // Fix for 4474172; see evaluation for more details
3101 loader = non_reflection_class_loader(loader);
3102
3103 oop cl = SystemDictionary::java_system_loader();
3104 while(cl != NULL) {
3105 if (cl == loader) return true;
3106 cl = parent(cl);
3107 }
3108 return false;
3109 }
3110
3111 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3112 if (loader != NULL) {
3113 // See whether this is one of the class loaders associated with
3114 // the generated bytecodes for reflection, and if so, "magically"
3115 // delegate to its parent to prevent class loading from occurring
3116 // in places where applications using reflection didn't expect it.
3117 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3118 // This might be null in non-1.4 JDKs
3119 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
3120 return parent(loader);
3121 }
3122 }
3123 return loader;
3124 }
3125
3126
3127 // Support for java_lang_System
3128 int java_lang_System::in_offset_in_bytes() {
3129 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3130 }
3131
3132
3133 int java_lang_System::out_offset_in_bytes() {
3134 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3135 }
3136
3137
3138 int java_lang_System::err_offset_in_bytes() {
3139 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3140 }
3141
3142
3143 bool java_lang_System::has_security_manager() {
3144 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass());
3145 address addr = ik->static_field_addr(static_security_offset);
3146 if (UseCompressedOops) {
3147 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3148 } else {
3149 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3150 }
3151 }
3152
3153 int java_lang_Class::_klass_offset;
3154 int java_lang_Class::_array_klass_offset;
3155 int java_lang_Class::_oop_size_offset;
3156 int java_lang_Class::_static_oop_field_count_offset;
3157 int java_lang_Class::_class_loader_offset;
3158 int java_lang_Class::_protection_domain_offset;
3159 int java_lang_Class::_component_mirror_offset;
3160 int java_lang_Class::_init_lock_offset;
3161 int java_lang_Class::_signers_offset;
3162 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3163 int java_lang_Throwable::backtrace_offset;
3164 int java_lang_Throwable::detailMessage_offset;
3165 int java_lang_Throwable::cause_offset;
3166 int java_lang_Throwable::stackTrace_offset;
3167 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3168 int java_lang_reflect_AccessibleObject::override_offset;
3169 int java_lang_reflect_Method::clazz_offset;
3170 int java_lang_reflect_Method::name_offset;
3171 int java_lang_reflect_Method::returnType_offset;
3172 int java_lang_reflect_Method::parameterTypes_offset;
3173 int java_lang_reflect_Method::exceptionTypes_offset;
3174 int java_lang_reflect_Method::slot_offset;
3175 int java_lang_reflect_Method::modifiers_offset;
3176 int java_lang_reflect_Method::signature_offset;
3177 int java_lang_reflect_Method::annotations_offset;
3178 int java_lang_reflect_Method::parameter_annotations_offset;
3179 int java_lang_reflect_Method::annotation_default_offset;
3180 int java_lang_reflect_Method::type_annotations_offset;
3181 int java_lang_reflect_Constructor::clazz_offset;
3182 int java_lang_reflect_Constructor::parameterTypes_offset;
3183 int java_lang_reflect_Constructor::exceptionTypes_offset;
3184 int java_lang_reflect_Constructor::slot_offset;
3185 int java_lang_reflect_Constructor::modifiers_offset;
3186 int java_lang_reflect_Constructor::signature_offset;
3187 int java_lang_reflect_Constructor::annotations_offset;
3188 int java_lang_reflect_Constructor::parameter_annotations_offset;
3189 int java_lang_reflect_Constructor::type_annotations_offset;
3190 int java_lang_reflect_Field::clazz_offset;
3191 int java_lang_reflect_Field::name_offset;
3192 int java_lang_reflect_Field::type_offset;
3193 int java_lang_reflect_Field::slot_offset;
3194 int java_lang_reflect_Field::modifiers_offset;
3195 int java_lang_reflect_Field::signature_offset;
3196 int java_lang_reflect_Field::annotations_offset;
3197 int java_lang_reflect_Field::type_annotations_offset;
3198 int java_lang_reflect_Parameter::name_offset;
3199 int java_lang_reflect_Parameter::modifiers_offset;
3200 int java_lang_reflect_Parameter::index_offset;
3201 int java_lang_reflect_Parameter::executable_offset;
3202 int java_lang_boxing_object::value_offset;
3203 int java_lang_boxing_object::long_value_offset;
3204 int java_lang_ref_Reference::referent_offset;
3205 int java_lang_ref_Reference::queue_offset;
3206 int java_lang_ref_Reference::next_offset;
3207 int java_lang_ref_Reference::discovered_offset;
3208 int java_lang_ref_Reference::static_lock_offset;
3209 int java_lang_ref_Reference::static_pending_offset;
3210 int java_lang_ref_Reference::number_of_fake_oop_fields;
3211 int java_lang_ref_SoftReference::timestamp_offset;
3212 int java_lang_ref_SoftReference::static_clock_offset;
3213 int java_lang_ClassLoader::parent_offset;
3214 int java_lang_System::static_in_offset;
3215 int java_lang_System::static_out_offset;
3216 int java_lang_System::static_err_offset;
3217 int java_lang_System::static_security_offset;
3218 int java_lang_StackTraceElement::declaringClass_offset;
3219 int java_lang_StackTraceElement::methodName_offset;
3220 int java_lang_StackTraceElement::fileName_offset;
3221 int java_lang_StackTraceElement::lineNumber_offset;
3222 int java_lang_AssertionStatusDirectives::classes_offset;
3223 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3224 int java_lang_AssertionStatusDirectives::packages_offset;
3225 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3226 int java_lang_AssertionStatusDirectives::deflt_offset;
3227 int java_nio_Buffer::_limit_offset;
3228 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3229 int sun_reflect_ConstantPool::_oop_offset;
3230 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3231
3232
3233 // Support for java_lang_StackTraceElement
3234
3235 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3236 element->obj_field_put(fileName_offset, value);
3237 }
3238
3239 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3240 element->obj_field_put(declaringClass_offset, value);
3241 }
3242
3243 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3244 element->obj_field_put(methodName_offset, value);
3245 }
3246
3247 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3248 element->int_field_put(lineNumber_offset, value);
3249 }
3250
3251
3252 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3253
3254 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3255 o->obj_field_put(classes_offset, val);
3256 }
3257
3258 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3259 o->obj_field_put(classEnabled_offset, val);
3260 }
3261
3262 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3263 o->obj_field_put(packages_offset, val);
3264 }
3265
3266 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3267 o->obj_field_put(packageEnabled_offset, val);
3268 }
3269
3270 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3271 o->bool_field_put(deflt_offset, val);
3272 }
3273
3274
3275 // Support for intrinsification of java.nio.Buffer.checkIndex
3276 int java_nio_Buffer::limit_offset() {
3277 return _limit_offset;
3278 }
3279
3280
3281 void java_nio_Buffer::compute_offsets() {
3282 Klass* k = SystemDictionary::nio_Buffer_klass();
3283 assert(k != NULL, "must be loaded in 1.4+");
3284 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3285 }
3286
3287 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3288 if (_owner_offset != 0) return;
3289
3290 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3291 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3292 compute_offset(_owner_offset, k,
3293 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3294 }
3295
3296 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3297 assert(_owner_offset != 0, "Must be initialized");
3298 return obj->obj_field(_owner_offset);
3299 }
3300
3301 // Compute hard-coded offsets
3302 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3303 // are not available to determine the offset_of_static_fields.
3304 void JavaClasses::compute_hard_coded_offsets() {
3305 const int x = heapOopSize;
3306 const int header = instanceOopDesc::base_offset_in_bytes();
3307
3308 // Throwable Class
3309 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
3310 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3311 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
3312 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3313 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x;
3314
3315 // java_lang_boxing_object
3316 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3317 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3318
3319 // java_lang_ref_Reference:
3320 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3321 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3322 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
3323 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
3324 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
3325 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3326 // Artificial fields for java_lang_ref_Reference
3327 // The first field is for the discovered field added in 1.4
3328 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3329
3330 // java_lang_ref_SoftReference Class
3331 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3332 // Don't multiply static fields because they are always in wordSize units
3333 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3334
3335 // java_lang_ClassLoader
3336 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3337
3338 // java_lang_System
3339 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
3340 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3341 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3342 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3343
3344 // java_lang_StackTraceElement
3345 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
3346 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3347 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
3348 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3349 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3350 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3351 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3352 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3353 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3354
3355 }
3356
3357
3358 // Compute non-hard-coded field offsets of all the classes in this file
3359 void JavaClasses::compute_offsets() {
3360 // java_lang_Class::compute_offsets was called earlier in bootstrap
3361 java_lang_ClassLoader::compute_offsets();
3362 java_lang_Thread::compute_offsets();
3363 java_lang_ThreadGroup::compute_offsets();
3364 java_lang_invoke_MethodHandle::compute_offsets();
3365 java_lang_invoke_DirectMethodHandle::compute_offsets();
3366 java_lang_invoke_MemberName::compute_offsets();
3367 java_lang_invoke_LambdaForm::compute_offsets();
3368 java_lang_invoke_MethodType::compute_offsets();
3369 java_lang_invoke_CallSite::compute_offsets();
3370 java_security_AccessControlContext::compute_offsets();
3371 // Initialize reflection classes. The layouts of these classes
3372 // changed with the new reflection implementation in JDK 1.4, and
3373 // since the Universe doesn't know what JDK version it is until this
3374 // point we defer computation of these offsets until now.
3375 java_lang_reflect_AccessibleObject::compute_offsets();
3376 java_lang_reflect_Method::compute_offsets();
3377 java_lang_reflect_Constructor::compute_offsets();
3378 java_lang_reflect_Field::compute_offsets();
3379 java_nio_Buffer::compute_offsets();
3380 sun_reflect_ConstantPool::compute_offsets();
3381 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3382 java_lang_reflect_Parameter::compute_offsets();
3383
3384 // generated interpreter code wants to know about the offsets we just computed:
3385 AbstractAssembler::update_delayed_values();
3386 }
3387
3388 #ifndef PRODUCT
3389
3390 // These functions exist to assert the validity of hard-coded field offsets to guard
3391 // against changes in the class files
3392
3393 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3394 EXCEPTION_MARK;
3395 fieldDescriptor fd;
3396 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3397 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3398 instanceKlassHandle h_klass (THREAD, k);
3399 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3400 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3401 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3402 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3403 return false;
3404 }
3405 if (fd.is_static()) {
3406 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3407 return false;
3408 }
3409 if (fd.offset() == hardcoded_offset ) {
3410 return true;
3411 } else {
3412 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3413 klass_name, field_name, hardcoded_offset, fd.offset());
3414 return false;
3415 }
3416 }
3417
3418
3419 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3420 EXCEPTION_MARK;
3421 fieldDescriptor fd;
3422 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3423 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3424 instanceKlassHandle h_klass (THREAD, k);
3425 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3426 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3427 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3428 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3429 return false;
3430 }
3431 if (!fd.is_static()) {
3432 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3433 return false;
3434 }
3435 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3436 return true;
3437 } else {
3438 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());
3439 return false;
3440 }
3441 }
3442
3443
3444 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3445 EXCEPTION_MARK;
3446 fieldDescriptor fd;
3447 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3448 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3449 instanceKlassHandle h_klass (THREAD, k);
3450 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3451 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3452 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3453 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3454 return false;
3455 }
3456 if (!fd.is_static() || !fd.has_initial_value()) {
3457 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3458 return false;
3459 }
3460 if (!fd.initial_value_tag().is_int()) {
3461 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3462 return false;
3463 }
3464 jint field_value = fd.int_initial_value();
3465 if (field_value == hardcoded_constant) {
3466 return true;
3467 } else {
3468 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);
3469 return false;
3470 }
3471 }
3472
3473
3474 // Check the hard-coded field offsets of all the classes in this file
3475
3476 void JavaClasses::check_offsets() {
3477 bool valid = true;
3478 HandleMark hm;
3479
3480 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3481 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3482
3483 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3484 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3485
3486 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3487 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3488
3489 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3490 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3491
3492 // java.lang.String
3493
3494 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3495 if (java_lang_String::has_offset_field()) {
3496 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3497 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3498 }
3499 if (java_lang_String::has_hash_field()) {
3500 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3501 }
3502
3503 // java.lang.Class
3504
3505 // Fake fields
3506 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3507 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3508
3509 // java.lang.Throwable
3510
3511 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3512 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3513 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3514 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3515
3516 // Boxed primitive objects (java_lang_boxing_object)
3517
3518 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3519 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3520 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3521 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3522 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3523 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3524 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3525 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3526
3527 // java.lang.ClassLoader
3528
3529 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3530
3531 // java.lang.System
3532
3533 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3534 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3535 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3536 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
3537
3538 // java.lang.StackTraceElement
3539
3540 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3541 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3542 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3543 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3544
3545 // java.lang.ref.Reference
3546
3547 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3548 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3549 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3550 // Fake field
3551 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3552 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3553 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3554
3555 // java.lang.ref.SoftReference
3556
3557 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3558 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3559
3560 // java.lang.AssertionStatusDirectives
3561 //
3562 // The CheckAssertionStatusDirectives boolean can be removed from here and
3563 // globals.hpp after the AssertionStatusDirectives class has been integrated
3564 // into merlin "for some time." Without it, the vm will fail with early
3565 // merlin builds.
3566
3567 if (CheckAssertionStatusDirectives) {
3568 const char* nm = "java/lang/AssertionStatusDirectives";
3569 const char* sig = "[Ljava/lang/String;";
3570 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3571 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3572 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3573 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3574 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3575 }
3576
3577 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3578 }
3579
3580 #endif // PRODUCT
3581
3582 int InjectedField::compute_offset() {
3583 Klass* klass_oop = klass();
3584 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3585 if (!may_be_java && !fs.access_flags().is_internal()) {
3586 // Only look at injected fields
3587 continue;
3588 }
3589 if (fs.name() == name() && fs.signature() == signature()) {
3590 return fs.offset();
3591 }
3592 }
3593 ResourceMark rm;
3594 tty->print_cr("Invalid layout of %s at %s/%s%s", InstanceKlass::cast(klass_oop)->external_name(), name()->as_C_string(), signature()->as_C_string(), may_be_java ? " (may_be_java)" : "");
3595 #ifndef PRODUCT
3596 klass_oop->print();
3597 tty->print_cr("all fields:");
3598 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3599 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
3600 }
3601 #endif //PRODUCT
3602 fatal("Invalid layout of preloaded class");
3603 return -1;
3604 }
3605
3606 void javaClasses_init() {
3607 JavaClasses::compute_offsets();
3608 JavaClasses::check_offsets();
3609 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3610 }