1 /*
2 * Copyright (c) 1997, 2009, 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 "incls/_precompiled.incl"
26 # include "incls/_javaClasses.cpp.incl"
27
28 static bool find_field(instanceKlass* ik,
29 symbolOop name_symbol, symbolOop signature_symbol,
30 fieldDescriptor* fd,
31 bool allow_super = false) {
32 if (allow_super)
33 return ik->find_field(name_symbol, signature_symbol, fd) != NULL;
34 else
35 return ik->find_local_field(name_symbol, signature_symbol, fd);
36 }
37
38 // Helpful routine for computing field offsets at run time rather than hardcoding them
39 static void
40 compute_offset(int &dest_offset,
41 klassOop klass_oop, symbolOop name_symbol, symbolOop signature_symbol,
42 bool allow_super = false) {
43 fieldDescriptor fd;
44 instanceKlass* ik = instanceKlass::cast(klass_oop);
45 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
46 ResourceMark rm;
47 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
48 fatal("Invalid layout of preloaded class");
49 }
50 dest_offset = fd.offset();
51 }
52
53 // Same as above but for "optional" offsets that might not be present in certain JDK versions
54 static void
55 compute_optional_offset(int& dest_offset,
56 klassOop klass_oop, symbolOop name_symbol, symbolOop signature_symbol,
57 bool allow_super = false) {
58 fieldDescriptor fd;
59 instanceKlass* ik = instanceKlass::cast(klass_oop);
60 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
61 dest_offset = fd.offset();
62 }
63 }
64
65
66 Handle java_lang_String::basic_create(int length, bool tenured, TRAPS) {
67 // Create the String object first, so there's a chance that the String
68 // and the char array it points to end up in the same cache line.
69 oop obj;
70 if (tenured) {
71 obj = instanceKlass::cast(SystemDictionary::String_klass())->allocate_permanent_instance(CHECK_NH);
72 } else {
73 obj = instanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH);
74 }
75
76 // Create the char array. The String object must be handlized here
77 // because GC can happen as a result of the allocation attempt.
78 Handle h_obj(THREAD, obj);
79 typeArrayOop buffer;
80 if (tenured) {
81 buffer = oopFactory::new_permanent_charArray(length, CHECK_NH);
82 } else {
83 buffer = oopFactory::new_charArray(length, CHECK_NH);
84 }
85
86 // Point the String at the char array
87 obj = h_obj();
88 set_value(obj, buffer);
89 // No need to zero the offset, allocation zero'ed the entire String object
90 assert(offset(obj) == 0, "initial String offset should be zero");
91 //set_offset(obj, 0);
92 set_count(obj, length);
93
94 return h_obj;
95 }
96
97 Handle java_lang_String::basic_create_from_unicode(jchar* unicode, int length, bool tenured, TRAPS) {
98 Handle h_obj = basic_create(length, tenured, CHECK_NH);
99 typeArrayOop buffer = value(h_obj());
100 for (int index = 0; index < length; index++) {
101 buffer->char_at_put(index, unicode[index]);
102 }
103 return h_obj;
104 }
105
106 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
107 return basic_create_from_unicode(unicode, length, false, CHECK_NH);
108 }
109
110 Handle java_lang_String::create_tenured_from_unicode(jchar* unicode, int length, TRAPS) {
111 return basic_create_from_unicode(unicode, length, true, CHECK_NH);
112 }
113
114 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
115 Handle h_obj = basic_create_from_unicode(unicode, length, false, CHECK_0);
116 return h_obj();
117 }
118
119 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
120 if (utf8_str == NULL) {
121 return Handle();
122 }
123 int length = UTF8::unicode_length(utf8_str);
124 Handle h_obj = basic_create(length, false, CHECK_NH);
125 if (length > 0) {
126 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
127 }
128 return h_obj;
129 }
130
131 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
132 Handle h_obj = create_from_str(utf8_str, CHECK_0);
133 return h_obj();
134 }
135
136 Handle java_lang_String::create_from_symbol(symbolHandle symbol, TRAPS) {
137 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
138 Handle h_obj = basic_create(length, false, CHECK_NH);
139 if (length > 0) {
140 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
141 }
142 return h_obj;
143 }
144
145 // Converts a C string to a Java String based on current encoding
146 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
147 assert(str != NULL, "bad arguments");
148
149 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
150 static to_java_string_fn_t _to_java_string_fn = NULL;
151
152 if (_to_java_string_fn == NULL) {
153 void *lib_handle = os::native_java_library();
154 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, hpi::dll_lookup(lib_handle, "NewStringPlatform"));
155 if (_to_java_string_fn == NULL) {
156 fatal("NewStringPlatform missing");
157 }
158 }
159
160 jstring js = NULL;
161 { JavaThread* thread = (JavaThread*)THREAD;
162 assert(thread->is_Java_thread(), "must be java thread");
163 HandleMark hm(thread);
164 ThreadToNativeFromVM ttn(thread);
165 js = (_to_java_string_fn)(thread->jni_environment(), str);
166 }
167 return Handle(THREAD, JNIHandles::resolve(js));
168 }
169
170 // Converts a Java String to a native C string that can be used for
171 // native OS calls.
172 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
173
174 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
175 static to_platform_string_fn_t _to_platform_string_fn = NULL;
176
177 if (_to_platform_string_fn == NULL) {
178 void *lib_handle = os::native_java_library();
179 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, hpi::dll_lookup(lib_handle, "GetStringPlatformChars"));
180 if (_to_platform_string_fn == NULL) {
181 fatal("GetStringPlatformChars missing");
182 }
183 }
184
185 char *native_platform_string;
186 { JavaThread* thread = (JavaThread*)THREAD;
187 assert(thread->is_Java_thread(), "must be java thread");
188 JNIEnv *env = thread->jni_environment();
189 jstring js = (jstring) JNIHandles::make_local(env, java_string());
190 bool is_copy;
191 HandleMark hm(thread);
192 ThreadToNativeFromVM ttn(thread);
193 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
194 assert(is_copy == JNI_TRUE, "is_copy value changed");
195 JNIHandles::destroy_local(js);
196 }
197 return native_platform_string;
198 }
199
200 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
201 oop obj = java_string();
202 // Typical usage is to convert all '/' to '.' in string.
203 typeArrayOop value = java_lang_String::value(obj);
204 int offset = java_lang_String::offset(obj);
205 int length = java_lang_String::length(obj);
206
207 // First check if any from_char exist
208 int index; // Declared outside, used later
209 for (index = 0; index < length; index++) {
210 if (value->char_at(index + offset) == from_char) {
211 break;
212 }
213 }
214 if (index == length) {
215 // No from_char, so do not copy.
216 return java_string;
217 }
218
219 // Create new UNICODE buffer. Must handlize value because GC
220 // may happen during String and char array creation.
221 typeArrayHandle h_value(THREAD, value);
222 Handle string = basic_create(length, false, CHECK_NH);
223
224 typeArrayOop from_buffer = h_value();
225 typeArrayOop to_buffer = java_lang_String::value(string());
226
227 // Copy contents
228 for (index = 0; index < length; index++) {
229 jchar c = from_buffer->char_at(index + offset);
230 if (c == from_char) {
231 c = to_char;
232 }
233 to_buffer->char_at_put(index, c);
234 }
235 return string;
236 }
237
238 jchar* java_lang_String::as_unicode_string(oop java_string, int& length) {
239 typeArrayOop value = java_lang_String::value(java_string);
240 int offset = java_lang_String::offset(java_string);
241 length = java_lang_String::length(java_string);
242
243 jchar* result = NEW_RESOURCE_ARRAY(jchar, length);
244 for (int index = 0; index < length; index++) {
245 result[index] = value->char_at(index + offset);
246 }
247 return result;
248 }
249
250 symbolHandle java_lang_String::as_symbol(Handle java_string, TRAPS) {
251 oop obj = java_string();
252 typeArrayOop value = java_lang_String::value(obj);
253 int offset = java_lang_String::offset(obj);
254 int length = java_lang_String::length(obj);
255 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
256 symbolOop sym = SymbolTable::lookup_unicode(base, length, THREAD);
257 return symbolHandle(THREAD, sym);
258 }
259
260 symbolOop java_lang_String::as_symbol_or_null(oop java_string) {
261 typeArrayOop value = java_lang_String::value(java_string);
262 int offset = java_lang_String::offset(java_string);
263 int length = java_lang_String::length(java_string);
264 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
265 return SymbolTable::probe_unicode(base, length);
266 }
267
268
269 int java_lang_String::utf8_length(oop java_string) {
270 typeArrayOop value = java_lang_String::value(java_string);
271 int offset = java_lang_String::offset(java_string);
272 int length = java_lang_String::length(java_string);
273 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
274 return UNICODE::utf8_length(position, length);
275 }
276
277 char* java_lang_String::as_utf8_string(oop java_string) {
278 typeArrayOop value = java_lang_String::value(java_string);
279 int offset = java_lang_String::offset(java_string);
280 int length = java_lang_String::length(java_string);
281 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
282 return UNICODE::as_utf8(position, length);
283 }
284
285 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
286 typeArrayOop value = java_lang_String::value(java_string);
287 int offset = java_lang_String::offset(java_string);
288 int length = java_lang_String::length(java_string);
289 assert(start + len <= length, "just checking");
290 jchar* position = value->char_at_addr(offset + start);
291 return UNICODE::as_utf8(position, len);
292 }
293
294 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
295 assert(SharedSkipVerify ||
296 java_string->klass() == SystemDictionary::String_klass(),
297 "must be java_string");
298 typeArrayOop value = java_lang_String::value(java_string);
299 int offset = java_lang_String::offset(java_string);
300 int length = java_lang_String::length(java_string);
301 if (length != len) {
302 return false;
303 }
304 for (int i = 0; i < len; i++) {
305 if (value->char_at(i + offset) != chars[i]) {
306 return false;
307 }
308 }
309 return true;
310 }
311
312 void java_lang_String::print(Handle java_string, outputStream* st) {
313 oop obj = java_string();
314 assert(obj->klass() == SystemDictionary::String_klass(), "must be java_string");
315 typeArrayOop value = java_lang_String::value(obj);
316 int offset = java_lang_String::offset(obj);
317 int length = java_lang_String::length(obj);
318
319 int end = MIN2(length, 100);
320 if (value == NULL) {
321 // This can happen if, e.g., printing a String
322 // object before its initializer has been called
323 st->print_cr("NULL");
324 } else {
325 st->print("\"");
326 for (int index = 0; index < length; index++) {
327 st->print("%c", value->char_at(index + offset));
328 }
329 st->print("\"");
330 }
331 }
332
333
334 oop java_lang_Class::create_mirror(KlassHandle k, TRAPS) {
335 assert(k->java_mirror() == NULL, "should only assign mirror once");
336 // Use this moment of initialization to cache modifier_flags also,
337 // to support Class.getModifiers(). Instance classes recalculate
338 // the cached flags after the class file is parsed, but before the
339 // class is put into the system dictionary.
340 int computed_modifiers = k->compute_modifier_flags(CHECK_0);
341 k->set_modifier_flags(computed_modifiers);
342 if (SystemDictionary::Class_klass_loaded()) {
343 // Allocate mirror (java.lang.Class instance)
344 Handle mirror = instanceKlass::cast(SystemDictionary::Class_klass())->allocate_permanent_instance(CHECK_0);
345 // Setup indirections
346 mirror->obj_field_put(klass_offset, k());
347 k->set_java_mirror(mirror());
348 // It might also have a component mirror. This mirror must already exist.
349 if (k->oop_is_javaArray()) {
350 Handle comp_mirror;
351 if (k->oop_is_typeArray()) {
352 BasicType type = typeArrayKlass::cast(k->as_klassOop())->element_type();
353 comp_mirror = Universe::java_mirror(type);
354 assert(comp_mirror.not_null(), "must have primitive mirror");
355 } else if (k->oop_is_objArray()) {
356 klassOop element_klass = objArrayKlass::cast(k->as_klassOop())->element_klass();
357 if (element_klass != NULL
358 && (Klass::cast(element_klass)->oop_is_instance() ||
359 Klass::cast(element_klass)->oop_is_javaArray())) {
360 comp_mirror = Klass::cast(element_klass)->java_mirror();
361 assert(comp_mirror.not_null(), "must have element mirror");
362 }
363 // else some object array internal to the VM, like systemObjArrayKlassObj
364 }
365 if (comp_mirror.not_null()) {
366 // Two-way link between the array klass and its component mirror:
367 arrayKlass::cast(k->as_klassOop())->set_component_mirror(comp_mirror());
368 set_array_klass(comp_mirror(), k->as_klassOop());
369 }
370 }
371 return mirror();
372 } else {
373 return NULL;
374 }
375 }
376
377
378 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
379 // This should be improved by adding a field at the Java level or by
380 // introducing a new VM klass (see comment in ClassFileParser)
381 oop java_class = instanceKlass::cast(SystemDictionary::Class_klass())->allocate_permanent_instance(CHECK_0);
382 if (type != T_VOID) {
383 klassOop aklass = Universe::typeArrayKlassObj(type);
384 assert(aklass != NULL, "correct bootstrap");
385 set_array_klass(java_class, aklass);
386 }
387 return java_class;
388 }
389
390
391 klassOop java_lang_Class::as_klassOop(oop java_class) {
392 //%note memory_2
393 klassOop k = klassOop(java_class->obj_field(klass_offset));
394 assert(k == NULL || k->is_klass(), "type check");
395 return k;
396 }
397
398
399 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
400 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
401 symbolOop name = NULL;
402 bool is_instance = false;
403 if (is_primitive(java_class)) {
404 name = vmSymbols::type_signature(primitive_type(java_class));
405 } else {
406 klassOop k = as_klassOop(java_class);
407 is_instance = Klass::cast(k)->oop_is_instance();
408 name = Klass::cast(k)->name();
409 }
410 if (name == NULL) {
411 st->print("<null>");
412 return;
413 }
414 if (is_instance) st->print("L");
415 st->write((char*) name->base(), (int) name->utf8_length());
416 if (is_instance) st->print(";");
417 }
418
419 symbolOop java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
420 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
421 symbolOop name = NULL;
422 if (is_primitive(java_class)) {
423 return vmSymbols::type_signature(primitive_type(java_class));
424 } else {
425 klassOop k = as_klassOop(java_class);
426 if (!Klass::cast(k)->oop_is_instance()) {
427 return Klass::cast(k)->name();
428 } else {
429 ResourceMark rm;
430 const char* sigstr = Klass::cast(k)->signature_name();
431 int siglen = (int) strlen(sigstr);
432 if (!intern_if_not_found)
433 return SymbolTable::probe(sigstr, siglen);
434 else
435 return oopFactory::new_symbol(sigstr, siglen, THREAD);
436 }
437 }
438 }
439
440
441 klassOop java_lang_Class::array_klass(oop java_class) {
442 klassOop k = klassOop(java_class->obj_field(array_klass_offset));
443 assert(k == NULL || k->is_klass() && Klass::cast(k)->oop_is_javaArray(), "should be array klass");
444 return k;
445 }
446
447
448 void java_lang_Class::set_array_klass(oop java_class, klassOop klass) {
449 assert(klass->is_klass() && Klass::cast(klass)->oop_is_javaArray(), "should be array klass");
450 java_class->obj_field_put(array_klass_offset, klass);
451 }
452
453
454 methodOop java_lang_Class::resolved_constructor(oop java_class) {
455 oop constructor = java_class->obj_field(resolved_constructor_offset);
456 assert(constructor == NULL || constructor->is_method(), "should be method");
457 return methodOop(constructor);
458 }
459
460
461 void java_lang_Class::set_resolved_constructor(oop java_class, methodOop constructor) {
462 assert(constructor->is_method(), "should be method");
463 java_class->obj_field_put(resolved_constructor_offset, constructor);
464 }
465
466
467 bool java_lang_Class::is_primitive(oop java_class) {
468 // should assert:
469 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
470 klassOop k = klassOop(java_class->obj_field(klass_offset));
471 return k == NULL;
472 }
473
474
475 BasicType java_lang_Class::primitive_type(oop java_class) {
476 assert(java_lang_Class::is_primitive(java_class), "just checking");
477 klassOop ak = klassOop(java_class->obj_field(array_klass_offset));
478 BasicType type = T_VOID;
479 if (ak != NULL) {
480 // Note: create_basic_type_mirror above initializes ak to a non-null value.
481 type = arrayKlass::cast(ak)->element_type();
482 } else {
483 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
484 }
485 assert(Universe::java_mirror(type) == java_class, "must be consistent");
486 return type;
487 }
488
489 BasicType java_lang_Class::as_BasicType(oop java_class, klassOop* reference_klass) {
490 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
491 if (is_primitive(java_class)) {
492 if (reference_klass != NULL)
493 (*reference_klass) = NULL;
494 return primitive_type(java_class);
495 } else {
496 if (reference_klass != NULL)
497 (*reference_klass) = as_klassOop(java_class);
498 return T_OBJECT;
499 }
500 }
501
502
503 oop java_lang_Class::primitive_mirror(BasicType t) {
504 oop mirror = Universe::java_mirror(t);
505 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
506 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
507 return mirror;
508 }
509
510 bool java_lang_Class::offsets_computed = false;
511 int java_lang_Class::classRedefinedCount_offset = -1;
512 int java_lang_Class::parallelCapable_offset = -1;
513
514 void java_lang_Class::compute_offsets() {
515 assert(!offsets_computed, "offsets should be initialized only once");
516 offsets_computed = true;
517
518 klassOop k = SystemDictionary::Class_klass();
519 // The classRedefinedCount field is only present starting in 1.5,
520 // so don't go fatal.
521 compute_optional_offset(classRedefinedCount_offset,
522 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
523
524 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
525 klassOop k1 = SystemDictionary::ClassLoader_klass();
526 compute_optional_offset(parallelCapable_offset,
527 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
528 }
529
530 // For class loader classes, parallelCapable defined
531 // based on non-null field
532 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
533 bool java_lang_Class::parallelCapable(oop class_loader) {
534 if (!JDK_Version::is_gte_jdk17x_version()
535 || parallelCapable_offset == -1) {
536 // Default for backward compatibility is false
537 return false;
538 }
539 return (class_loader->obj_field(parallelCapable_offset) != NULL);
540 }
541
542 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
543 if (!JDK_Version::is_gte_jdk15x_version()
544 || classRedefinedCount_offset == -1) {
545 // The classRedefinedCount field is only present starting in 1.5.
546 // If we don't have an offset for it then just return -1 as a marker.
547 return -1;
548 }
549
550 return the_class_mirror->int_field(classRedefinedCount_offset);
551 }
552
553 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
554 if (!JDK_Version::is_gte_jdk15x_version()
555 || classRedefinedCount_offset == -1) {
556 // The classRedefinedCount field is only present starting in 1.5.
557 // If we don't have an offset for it then nothing to set.
558 return;
559 }
560
561 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
562 }
563
564
565 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
566 // platform thread structure, and a eetop offset which was used for thread
567 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
568 // merged, so in the HotSpot VM we just use the eetop field for the thread
569 // instead of the privateInfo_offset.
570 //
571 // Note: The stackSize field is only present starting in 1.4.
572
573 int java_lang_Thread::_name_offset = 0;
574 int java_lang_Thread::_group_offset = 0;
575 int java_lang_Thread::_contextClassLoader_offset = 0;
576 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
577 int java_lang_Thread::_priority_offset = 0;
578 int java_lang_Thread::_eetop_offset = 0;
579 int java_lang_Thread::_daemon_offset = 0;
580 int java_lang_Thread::_stillborn_offset = 0;
581 int java_lang_Thread::_stackSize_offset = 0;
582 int java_lang_Thread::_tid_offset = 0;
583 int java_lang_Thread::_thread_status_offset = 0;
584 int java_lang_Thread::_park_blocker_offset = 0;
585 int java_lang_Thread::_park_event_offset = 0 ;
586
587
588 void java_lang_Thread::compute_offsets() {
589 assert(_group_offset == 0, "offsets should be initialized only once");
590
591 klassOop k = SystemDictionary::Thread_klass();
592 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature());
593 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
594 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
595 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
596 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
597 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
598 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
599 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
600 // The stackSize field is only present starting in 1.4, so don't go fatal.
601 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
602 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
603 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
604 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
605 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
606 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
607 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
608 vmSymbols::long_signature());
609 }
610
611
612 JavaThread* java_lang_Thread::thread(oop java_thread) {
613 return (JavaThread*)java_thread->address_field(_eetop_offset);
614 }
615
616
617 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
618 java_thread->address_field_put(_eetop_offset, (address)thread);
619 }
620
621
622 typeArrayOop java_lang_Thread::name(oop java_thread) {
623 oop name = java_thread->obj_field(_name_offset);
624 assert(name == NULL || (name->is_typeArray() && typeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking");
625 return typeArrayOop(name);
626 }
627
628
629 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) {
630 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL");
631 java_thread->obj_field_put(_name_offset, name);
632 }
633
634
635 ThreadPriority java_lang_Thread::priority(oop java_thread) {
636 return (ThreadPriority)java_thread->int_field(_priority_offset);
637 }
638
639
640 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
641 java_thread->int_field_put(_priority_offset, priority);
642 }
643
644
645 oop java_lang_Thread::threadGroup(oop java_thread) {
646 return java_thread->obj_field(_group_offset);
647 }
648
649
650 bool java_lang_Thread::is_stillborn(oop java_thread) {
651 return java_thread->bool_field(_stillborn_offset) != 0;
652 }
653
654
655 // We never have reason to turn the stillborn bit off
656 void java_lang_Thread::set_stillborn(oop java_thread) {
657 java_thread->bool_field_put(_stillborn_offset, true);
658 }
659
660
661 bool java_lang_Thread::is_alive(oop java_thread) {
662 JavaThread* thr = java_lang_Thread::thread(java_thread);
663 return (thr != NULL);
664 }
665
666
667 bool java_lang_Thread::is_daemon(oop java_thread) {
668 return java_thread->bool_field(_daemon_offset) != 0;
669 }
670
671
672 void java_lang_Thread::set_daemon(oop java_thread) {
673 java_thread->bool_field_put(_daemon_offset, true);
674 }
675
676 oop java_lang_Thread::context_class_loader(oop java_thread) {
677 return java_thread->obj_field(_contextClassLoader_offset);
678 }
679
680 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
681 return java_thread->obj_field(_inheritedAccessControlContext_offset);
682 }
683
684
685 jlong java_lang_Thread::stackSize(oop java_thread) {
686 // The stackSize field is only present starting in 1.4
687 if (_stackSize_offset > 0) {
688 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check");
689 return java_thread->long_field(_stackSize_offset);
690 } else {
691 return 0;
692 }
693 }
694
695 // Write the thread status value to threadStatus field in java.lang.Thread java class.
696 void java_lang_Thread::set_thread_status(oop java_thread,
697 java_lang_Thread::ThreadStatus status) {
698 assert(JavaThread::current()->thread_state() == _thread_in_vm, "Java Thread is not running in vm");
699 // The threadStatus is only present starting in 1.5
700 if (_thread_status_offset > 0) {
701 java_thread->int_field_put(_thread_status_offset, status);
702 }
703 }
704
705 // Read thread status value from threadStatus field in java.lang.Thread java class.
706 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
707 assert(Thread::current()->is_VM_thread() ||
708 JavaThread::current()->thread_state() == _thread_in_vm,
709 "Java Thread is not running in vm");
710 // The threadStatus is only present starting in 1.5
711 if (_thread_status_offset > 0) {
712 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
713 } else {
714 // All we can easily figure out is if it is alive, but that is
715 // enough info for a valid unknown status.
716 // These aren't restricted to valid set ThreadStatus values, so
717 // use JVMTI values and cast.
718 JavaThread* thr = java_lang_Thread::thread(java_thread);
719 if (thr == NULL) {
720 // the thread hasn't run yet or is in the process of exiting
721 return NEW;
722 }
723 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
724 }
725 }
726
727
728 jlong java_lang_Thread::thread_id(oop java_thread) {
729 // The thread ID field is only present starting in 1.5
730 if (_tid_offset > 0) {
731 return java_thread->long_field(_tid_offset);
732 } else {
733 return 0;
734 }
735 }
736
737 oop java_lang_Thread::park_blocker(oop java_thread) {
738 assert(JDK_Version::current().supports_thread_park_blocker() &&
739 _park_blocker_offset != 0, "Must support parkBlocker field");
740
741 if (_park_blocker_offset > 0) {
742 return java_thread->obj_field(_park_blocker_offset);
743 }
744
745 return NULL;
746 }
747
748 jlong java_lang_Thread::park_event(oop java_thread) {
749 if (_park_event_offset > 0) {
750 return java_thread->long_field(_park_event_offset);
751 }
752 return 0;
753 }
754
755 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
756 if (_park_event_offset > 0) {
757 java_thread->long_field_put(_park_event_offset, ptr);
758 return true;
759 }
760 return false;
761 }
762
763
764 const char* java_lang_Thread::thread_status_name(oop java_thread) {
765 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status");
766 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
767 switch (status) {
768 case NEW : return "NEW";
769 case RUNNABLE : return "RUNNABLE";
770 case SLEEPING : return "TIMED_WAITING (sleeping)";
771 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
772 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
773 case PARKED : return "WAITING (parking)";
774 case PARKED_TIMED : return "TIMED_WAITING (parking)";
775 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
776 case TERMINATED : return "TERMINATED";
777 default : return "UNKNOWN";
778 };
779 }
780 int java_lang_ThreadGroup::_parent_offset = 0;
781 int java_lang_ThreadGroup::_name_offset = 0;
782 int java_lang_ThreadGroup::_threads_offset = 0;
783 int java_lang_ThreadGroup::_groups_offset = 0;
784 int java_lang_ThreadGroup::_maxPriority_offset = 0;
785 int java_lang_ThreadGroup::_destroyed_offset = 0;
786 int java_lang_ThreadGroup::_daemon_offset = 0;
787 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
788 int java_lang_ThreadGroup::_nthreads_offset = 0;
789 int java_lang_ThreadGroup::_ngroups_offset = 0;
790
791 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
792 assert(java_thread_group->is_oop(), "thread group must be oop");
793 return java_thread_group->obj_field(_parent_offset);
794 }
795
796 // ("name as oop" accessor is not necessary)
797
798 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
799 oop name = java_thread_group->obj_field(_name_offset);
800 // ThreadGroup.name can be null
801 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
802 }
803
804 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
805 assert(java_thread_group->is_oop(), "thread group must be oop");
806 return java_thread_group->int_field(_nthreads_offset);
807 }
808
809 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
810 oop threads = java_thread_group->obj_field(_threads_offset);
811 assert(threads != NULL, "threadgroups should have threads");
812 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
813 return objArrayOop(threads);
814 }
815
816 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
817 assert(java_thread_group->is_oop(), "thread group must be oop");
818 return java_thread_group->int_field(_ngroups_offset);
819 }
820
821 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
822 oop groups = java_thread_group->obj_field(_groups_offset);
823 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
824 return objArrayOop(groups);
825 }
826
827 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
828 assert(java_thread_group->is_oop(), "thread group must be oop");
829 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
830 }
831
832 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
833 assert(java_thread_group->is_oop(), "thread group must be oop");
834 return java_thread_group->bool_field(_destroyed_offset) != 0;
835 }
836
837 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
838 assert(java_thread_group->is_oop(), "thread group must be oop");
839 return java_thread_group->bool_field(_daemon_offset) != 0;
840 }
841
842 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
843 assert(java_thread_group->is_oop(), "thread group must be oop");
844 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
845 }
846
847 void java_lang_ThreadGroup::compute_offsets() {
848 assert(_parent_offset == 0, "offsets should be initialized only once");
849
850 klassOop k = SystemDictionary::ThreadGroup_klass();
851
852 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
853 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
854 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
855 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
856 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
857 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
858 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
859 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
860 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
861 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
862 }
863
864 oop java_lang_Throwable::backtrace(oop throwable) {
865 return throwable->obj_field_acquire(backtrace_offset);
866 }
867
868
869 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
870 throwable->release_obj_field_put(backtrace_offset, value);
871 }
872
873
874 oop java_lang_Throwable::message(oop throwable) {
875 return throwable->obj_field(detailMessage_offset);
876 }
877
878
879 oop java_lang_Throwable::message(Handle throwable) {
880 return throwable->obj_field(detailMessage_offset);
881 }
882
883
884 void java_lang_Throwable::set_message(oop throwable, oop value) {
885 throwable->obj_field_put(detailMessage_offset, value);
886 }
887
888
889 void java_lang_Throwable::clear_stacktrace(oop throwable) {
890 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
891 throwable->obj_field_put(stackTrace_offset, NULL);
892 }
893
894
895 void java_lang_Throwable::print(oop throwable, outputStream* st) {
896 ResourceMark rm;
897 klassOop k = throwable->klass();
898 assert(k != NULL, "just checking");
899 st->print("%s", instanceKlass::cast(k)->external_name());
900 oop msg = message(throwable);
901 if (msg != NULL) {
902 st->print(": %s", java_lang_String::as_utf8_string(msg));
903 }
904 }
905
906
907 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
908 ResourceMark rm;
909 klassOop k = throwable->klass();
910 assert(k != NULL, "just checking");
911 st->print("%s", instanceKlass::cast(k)->external_name());
912 oop msg = message(throwable);
913 if (msg != NULL) {
914 st->print(": %s", java_lang_String::as_utf8_string(msg));
915 }
916 }
917
918 // Print stack trace element to resource allocated buffer
919 char* java_lang_Throwable::print_stack_element_to_buffer(methodOop method, int bci) {
920 // Get strings and string lengths
921 instanceKlass* klass = instanceKlass::cast(method->method_holder());
922 const char* klass_name = klass->external_name();
923 int buf_len = (int)strlen(klass_name);
924 char* source_file_name;
925 if (klass->source_file_name() == NULL) {
926 source_file_name = NULL;
927 } else {
928 source_file_name = klass->source_file_name()->as_C_string();
929 buf_len += (int)strlen(source_file_name);
930 }
931 char* method_name = method->name()->as_C_string();
932 buf_len += (int)strlen(method_name);
933
934 // Allocate temporary buffer with extra space for formatting and line number
935 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
936
937 // Print stack trace line in buffer
938 sprintf(buf, "\tat %s.%s", klass_name, method_name);
939 if (method->is_native()) {
940 strcat(buf, "(Native Method)");
941 } else {
942 int line_number = method->line_number_from_bci(bci);
943 if (source_file_name != NULL && (line_number != -1)) {
944 // Sourcename and linenumber
945 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
946 } else if (source_file_name != NULL) {
947 // Just sourcename
948 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
949 } else {
950 // Neither soucename and linenumber
951 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
952 }
953 nmethod* nm = method->code();
954 if (WizardMode && nm != NULL) {
955 sprintf(buf + (int)strlen(buf), "(nmethod " PTR_FORMAT ")", (intptr_t)nm);
956 }
957 }
958
959 return buf;
960 }
961
962
963 void java_lang_Throwable::print_stack_element(Handle stream, methodOop method, int bci) {
964 ResourceMark rm;
965 char* buf = print_stack_element_to_buffer(method, bci);
966 print_to_stream(stream, buf);
967 }
968
969 void java_lang_Throwable::print_stack_element(outputStream *st, methodOop method, int bci) {
970 ResourceMark rm;
971 char* buf = print_stack_element_to_buffer(method, bci);
972 st->print_cr("%s", buf);
973 }
974
975 void java_lang_Throwable::print_to_stream(Handle stream, const char* str) {
976 if (stream.is_null()) {
977 tty->print_cr("%s", str);
978 } else {
979 EXCEPTION_MARK;
980 JavaValue result(T_VOID);
981 Handle arg (THREAD, oopFactory::new_charArray(str, THREAD));
982 if (!HAS_PENDING_EXCEPTION) {
983 JavaCalls::call_virtual(&result,
984 stream,
985 KlassHandle(THREAD, stream->klass()),
986 vmSymbolHandles::println_name(),
987 vmSymbolHandles::char_array_void_signature(),
988 arg,
989 THREAD);
990 }
991 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
992 if (HAS_PENDING_EXCEPTION) CLEAR_PENDING_EXCEPTION;
993 }
994
995 }
996
997
998 const char* java_lang_Throwable::no_stack_trace_message() {
999 return "\t<<no stack trace available>>";
1000 }
1001
1002
1003 // Currently used only for exceptions occurring during startup
1004 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1005 Thread *THREAD = Thread::current();
1006 Handle h_throwable(THREAD, throwable);
1007 while (h_throwable.not_null()) {
1008 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1009 if (result.is_null()) {
1010 st->print_cr(no_stack_trace_message());
1011 return;
1012 }
1013
1014 while (result.not_null()) {
1015 objArrayHandle methods (THREAD,
1016 objArrayOop(result->obj_at(trace_methods_offset)));
1017 typeArrayHandle bcis (THREAD,
1018 typeArrayOop(result->obj_at(trace_bcis_offset)));
1019
1020 if (methods.is_null() || bcis.is_null()) {
1021 st->print_cr(no_stack_trace_message());
1022 return;
1023 }
1024
1025 int length = methods()->length();
1026 for (int index = 0; index < length; index++) {
1027 methodOop method = methodOop(methods()->obj_at(index));
1028 if (method == NULL) goto handle_cause;
1029 int bci = bcis->ushort_at(index);
1030 print_stack_element(st, method, bci);
1031 }
1032 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1033 }
1034 handle_cause:
1035 {
1036 EXCEPTION_MARK;
1037 JavaValue result(T_OBJECT);
1038 JavaCalls::call_virtual(&result,
1039 h_throwable,
1040 KlassHandle(THREAD, h_throwable->klass()),
1041 vmSymbolHandles::getCause_name(),
1042 vmSymbolHandles::void_throwable_signature(),
1043 THREAD);
1044 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1045 if (HAS_PENDING_EXCEPTION) {
1046 CLEAR_PENDING_EXCEPTION;
1047 h_throwable = Handle();
1048 } else {
1049 h_throwable = Handle(THREAD, (oop) result.get_jobject());
1050 if (h_throwable.not_null()) {
1051 st->print("Caused by: ");
1052 print(h_throwable, st);
1053 st->cr();
1054 }
1055 }
1056 }
1057 }
1058 }
1059
1060
1061 void java_lang_Throwable::print_stack_trace(oop throwable, oop print_stream) {
1062 // Note: this is no longer used in Merlin, but we support it for compatibility.
1063 Thread *thread = Thread::current();
1064 Handle stream(thread, print_stream);
1065 objArrayHandle result (thread, objArrayOop(backtrace(throwable)));
1066 if (result.is_null()) {
1067 print_to_stream(stream, no_stack_trace_message());
1068 return;
1069 }
1070
1071 while (result.not_null()) {
1072 objArrayHandle methods (thread,
1073 objArrayOop(result->obj_at(trace_methods_offset)));
1074 typeArrayHandle bcis (thread,
1075 typeArrayOop(result->obj_at(trace_bcis_offset)));
1076
1077 if (methods.is_null() || bcis.is_null()) {
1078 print_to_stream(stream, no_stack_trace_message());
1079 return;
1080 }
1081
1082 int length = methods()->length();
1083 for (int index = 0; index < length; index++) {
1084 methodOop method = methodOop(methods()->obj_at(index));
1085 if (method == NULL) return;
1086 int bci = bcis->ushort_at(index);
1087 print_stack_element(stream, method, bci);
1088 }
1089 result = objArrayHandle(thread, objArrayOop(result->obj_at(trace_next_offset)));
1090 }
1091 }
1092
1093 // This class provides a simple wrapper over the internal structure of
1094 // exception backtrace to insulate users of the backtrace from needing
1095 // to know what it looks like.
1096 class BacktraceBuilder: public StackObj {
1097 private:
1098 Handle _backtrace;
1099 objArrayOop _head;
1100 objArrayOop _methods;
1101 typeArrayOop _bcis;
1102 int _index;
1103 bool _dirty;
1104 No_Safepoint_Verifier _nsv;
1105
1106 public:
1107
1108 enum {
1109 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1110 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1111 trace_next_offset = java_lang_Throwable::trace_next_offset,
1112 trace_size = java_lang_Throwable::trace_size,
1113 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1114 };
1115
1116 // constructor for new backtrace
1117 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _dirty(false) {
1118 expand(CHECK);
1119 _backtrace = _head;
1120 _index = 0;
1121 }
1122
1123 void flush() {
1124 // The following appears to have been an optimization to save from
1125 // doing a barrier for each individual store into the _methods array,
1126 // but rather to do it for the entire array after the series of writes.
1127 // That optimization seems to have been lost when compressed oops was
1128 // implemented. However, the extra card-marks below was left in place,
1129 // but is now redundant because the individual stores into the
1130 // _methods array already execute the barrier code. CR 6918185 has
1131 // been filed so the original code may be restored by deferring the
1132 // barriers until after the entire sequence of stores, thus re-enabling
1133 // the intent of the original optimization. In the meantime the redundant
1134 // card mark below is now disabled.
1135 if (_dirty && _methods != NULL) {
1136 #if 0
1137 BarrierSet* bs = Universe::heap()->barrier_set();
1138 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt");
1139 bs->write_ref_array((HeapWord*)_methods->base(), _methods->length());
1140 #endif
1141 _dirty = false;
1142 }
1143 }
1144
1145 void expand(TRAPS) {
1146 flush();
1147
1148 objArrayHandle old_head(THREAD, _head);
1149 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1150
1151 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1152 objArrayHandle new_head(THREAD, head);
1153
1154 objArrayOop methods = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1155 objArrayHandle new_methods(THREAD, methods);
1156
1157 typeArrayOop bcis = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1158 typeArrayHandle new_bcis(THREAD, bcis);
1159
1160 if (!old_head.is_null()) {
1161 old_head->obj_at_put(trace_next_offset, new_head());
1162 }
1163 new_head->obj_at_put(trace_methods_offset, new_methods());
1164 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1165
1166 _head = new_head();
1167 _methods = new_methods();
1168 _bcis = new_bcis();
1169 _index = 0;
1170 }
1171
1172 oop backtrace() {
1173 flush();
1174 return _backtrace();
1175 }
1176
1177 inline void push(methodOop method, short bci, TRAPS) {
1178 if (_index >= trace_chunk_size) {
1179 methodHandle mhandle(THREAD, method);
1180 expand(CHECK);
1181 method = mhandle();
1182 }
1183
1184 _methods->obj_at_put(_index, method);
1185 _bcis->ushort_at_put(_index, bci);
1186 _index++;
1187 _dirty = true;
1188 }
1189
1190 methodOop current_method() {
1191 assert(_index >= 0 && _index < trace_chunk_size, "out of range");
1192 return methodOop(_methods->obj_at(_index));
1193 }
1194
1195 jushort current_bci() {
1196 assert(_index >= 0 && _index < trace_chunk_size, "out of range");
1197 return _bcis->ushort_at(_index);
1198 }
1199 };
1200
1201
1202 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, TRAPS) {
1203 if (!StackTraceInThrowable) return;
1204 ResourceMark rm(THREAD);
1205
1206 // Start out by clearing the backtrace for this object, in case the VM
1207 // runs out of memory while allocating the stack trace
1208 set_backtrace(throwable(), NULL);
1209 if (JDK_Version::is_gte_jdk14x_version()) {
1210 // New since 1.4, clear lazily constructed Java level stacktrace if
1211 // refilling occurs
1212 clear_stacktrace(throwable());
1213 }
1214
1215 int max_depth = MaxJavaStackTraceDepth;
1216 JavaThread* thread = (JavaThread*)THREAD;
1217 BacktraceBuilder bt(CHECK);
1218
1219 // Instead of using vframe directly, this version of fill_in_stack_trace
1220 // basically handles everything by hand. This significantly improved the
1221 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1222 // See bug 6333838 for more details.
1223 // The "ASSERT" here is to verify this method generates the exactly same stack
1224 // trace as utilizing vframe.
1225 #ifdef ASSERT
1226 vframeStream st(thread);
1227 methodHandle st_method(THREAD, st.method());
1228 #endif
1229 int total_count = 0;
1230 RegisterMap map(thread, false);
1231 int decode_offset = 0;
1232 nmethod* nm = NULL;
1233 bool skip_fillInStackTrace_check = false;
1234 bool skip_throwableInit_check = false;
1235
1236 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1237 methodOop method = NULL;
1238 int bci = 0;
1239
1240 // Compiled java method case.
1241 if (decode_offset != 0) {
1242 DebugInfoReadStream stream(nm, decode_offset);
1243 decode_offset = stream.read_int();
1244 method = (methodOop)nm->oop_at(stream.read_int());
1245 bci = stream.read_bci();
1246 } else {
1247 if (fr.is_first_frame()) break;
1248 address pc = fr.pc();
1249 if (fr.is_interpreted_frame()) {
1250 intptr_t bcx = fr.interpreter_frame_bcx();
1251 method = fr.interpreter_frame_method();
1252 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
1253 fr = fr.sender(&map);
1254 } else {
1255 CodeBlob* cb = fr.cb();
1256 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1257 // but non nmethod
1258 fr = fr.sender(&map);
1259 if (cb == NULL || !cb->is_nmethod()) {
1260 continue;
1261 }
1262 nm = (nmethod*)cb;
1263 if (nm->method()->is_native()) {
1264 method = nm->method();
1265 bci = 0;
1266 } else {
1267 PcDesc* pd = nm->pc_desc_at(pc);
1268 decode_offset = pd->scope_decode_offset();
1269 // if decode_offset is not equal to 0, it will execute the
1270 // "compiled java method case" at the beginning of the loop.
1271 continue;
1272 }
1273 }
1274 }
1275 #ifdef ASSERT
1276 assert(st_method() == method && st.bci() == bci,
1277 "Wrong stack trace");
1278 st.next();
1279 // vframeStream::method isn't GC-safe so store off a copy
1280 // of the methodOop in case we GC.
1281 if (!st.at_end()) {
1282 st_method = st.method();
1283 }
1284 #endif
1285 if (!skip_fillInStackTrace_check) {
1286 // check "fillInStackTrace" only once, so we negate the flag
1287 // after the first time check.
1288 skip_fillInStackTrace_check = true;
1289 if (method->name() == vmSymbols::fillInStackTrace_name()) {
1290 continue;
1291 }
1292 }
1293 // skip <init> methods of the exceptions klass. If there is <init> methods
1294 // that belongs to a superclass of the exception we are going to skipping
1295 // them in stack trace. This is simlar to classic VM.
1296 if (!skip_throwableInit_check) {
1297 if (method->name() == vmSymbols::object_initializer_name() &&
1298 throwable->is_a(method->method_holder())) {
1299 continue;
1300 } else {
1301 // if no "Throwable.init()" method found, we stop checking it next time.
1302 skip_throwableInit_check = true;
1303 }
1304 }
1305 bt.push(method, bci, CHECK);
1306 total_count++;
1307 }
1308
1309 // Put completed stack trace into throwable object
1310 set_backtrace(throwable(), bt.backtrace());
1311 }
1312
1313 void java_lang_Throwable::fill_in_stack_trace(Handle throwable) {
1314 // No-op if stack trace is disabled
1315 if (!StackTraceInThrowable) {
1316 return;
1317 }
1318
1319 // Disable stack traces for some preallocated out of memory errors
1320 if (!Universe::should_fill_in_stack_trace(throwable)) {
1321 return;
1322 }
1323
1324 PRESERVE_EXCEPTION_MARK;
1325
1326 JavaThread* thread = JavaThread::active();
1327 fill_in_stack_trace(throwable, thread);
1328 // ignore exceptions thrown during stack trace filling
1329 CLEAR_PENDING_EXCEPTION;
1330 }
1331
1332 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1333 // Allocate stack trace - backtrace is created but not filled in
1334
1335 // No-op if stack trace is disabled
1336 if (!StackTraceInThrowable) return;
1337
1338 objArrayOop h_oop = oopFactory::new_objectArray(trace_size, CHECK);
1339 objArrayHandle backtrace (THREAD, h_oop);
1340 objArrayOop m_oop = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1341 objArrayHandle methods (THREAD, m_oop);
1342 typeArrayOop b = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1343 typeArrayHandle bcis(THREAD, b);
1344
1345 // backtrace has space for one chunk (next is NULL)
1346 backtrace->obj_at_put(trace_methods_offset, methods());
1347 backtrace->obj_at_put(trace_bcis_offset, bcis());
1348 set_backtrace(throwable(), backtrace());
1349 }
1350
1351
1352 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1353 // Fill in stack trace into preallocated backtrace (no GC)
1354
1355 // No-op if stack trace is disabled
1356 if (!StackTraceInThrowable) return;
1357
1358 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1359
1360 oop backtrace = java_lang_Throwable::backtrace(throwable());
1361 assert(backtrace != NULL, "backtrace not preallocated");
1362
1363 oop m = objArrayOop(backtrace)->obj_at(trace_methods_offset);
1364 objArrayOop methods = objArrayOop(m);
1365 assert(methods != NULL && methods->length() > 0, "method array not preallocated");
1366
1367 oop b = objArrayOop(backtrace)->obj_at(trace_bcis_offset);
1368 typeArrayOop bcis = typeArrayOop(b);
1369 assert(bcis != NULL, "bci array not preallocated");
1370
1371 assert(methods->length() == bcis->length(), "method and bci arrays should match");
1372
1373 JavaThread* thread = JavaThread::current();
1374 ResourceMark rm(thread);
1375 vframeStream st(thread);
1376
1377 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1378 // methods as preallocated errors aren't created by "java" code.
1379
1380 // fill in as much stack trace as possible
1381 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1382 int chunk_count = 0;
1383
1384 for (;!st.at_end(); st.next()) {
1385 // add element
1386 bcis->ushort_at_put(chunk_count, st.bci());
1387 methods->obj_at_put(chunk_count, st.method());
1388
1389 chunk_count++;
1390
1391 // Bail-out for deep stacks
1392 if (chunk_count >= max_chunks) break;
1393 }
1394 }
1395
1396
1397 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1398 if (throwable == NULL) {
1399 THROW_0(vmSymbols::java_lang_NullPointerException());
1400 }
1401 objArrayOop chunk = objArrayOop(backtrace(throwable));
1402 int depth = 0;
1403 if (chunk != NULL) {
1404 // Iterate over chunks and count full ones
1405 while (true) {
1406 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1407 if (next == NULL) break;
1408 depth += trace_chunk_size;
1409 chunk = next;
1410 }
1411 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1412 // Count element in remaining partial chunk
1413 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
1414 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1415 assert(methods != NULL && bcis != NULL, "sanity check");
1416 for (int i = 0; i < methods->length(); i++) {
1417 if (methods->obj_at(i) == NULL) break;
1418 depth++;
1419 }
1420 }
1421 return depth;
1422 }
1423
1424
1425 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1426 if (throwable == NULL) {
1427 THROW_0(vmSymbols::java_lang_NullPointerException());
1428 }
1429 if (index < 0) {
1430 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1431 }
1432 // Compute how many chunks to skip and index into actual chunk
1433 objArrayOop chunk = objArrayOop(backtrace(throwable));
1434 int skip_chunks = index / trace_chunk_size;
1435 int chunk_index = index % trace_chunk_size;
1436 while (chunk != NULL && skip_chunks > 0) {
1437 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1438 skip_chunks--;
1439 }
1440 if (chunk == NULL) {
1441 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1442 }
1443 // Get method,bci from chunk
1444 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
1445 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1446 assert(methods != NULL && bcis != NULL, "sanity check");
1447 methodHandle method(THREAD, methodOop(methods->obj_at(chunk_index)));
1448 int bci = bcis->ushort_at(chunk_index);
1449 // Chunk can be partial full
1450 if (method.is_null()) {
1451 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1452 }
1453
1454 oop element = java_lang_StackTraceElement::create(method, bci, CHECK_0);
1455 return element;
1456 }
1457
1458 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1459 // SystemDictionary::stackTraceElement_klass() will be null for pre-1.4 JDKs
1460 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1461
1462 // Allocate java.lang.StackTraceElement instance
1463 klassOop k = SystemDictionary::StackTraceElement_klass();
1464 assert(k != NULL, "must be loaded in 1.4+");
1465 instanceKlassHandle ik (THREAD, k);
1466 if (ik->should_be_initialized()) {
1467 ik->initialize(CHECK_0);
1468 }
1469
1470 Handle element = ik->allocate_instance_handle(CHECK_0);
1471 // Fill in class name
1472 ResourceMark rm(THREAD);
1473 const char* str = instanceKlass::cast(method->method_holder())->external_name();
1474 oop classname = StringTable::intern((char*) str, CHECK_0);
1475 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1476 // Fill in method name
1477 oop methodname = StringTable::intern(method->name(), CHECK_0);
1478 java_lang_StackTraceElement::set_methodName(element(), methodname);
1479 // Fill in source file name
1480 symbolOop source = instanceKlass::cast(method->method_holder())->source_file_name();
1481 oop filename = StringTable::intern(source, CHECK_0);
1482 java_lang_StackTraceElement::set_fileName(element(), filename);
1483 // File in source line number
1484 int line_number;
1485 if (method->is_native()) {
1486 // Negative value different from -1 below, enabling Java code in
1487 // class java.lang.StackTraceElement to distinguish "native" from
1488 // "no LineNumberTable".
1489 line_number = -2;
1490 } else {
1491 // Returns -1 if no LineNumberTable, and otherwise actual line number
1492 line_number = method->line_number_from_bci(bci);
1493 }
1494 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1495
1496 return element();
1497 }
1498
1499
1500 void java_lang_reflect_AccessibleObject::compute_offsets() {
1501 klassOop k = SystemDictionary::reflect_AccessibleObject_klass();
1502 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1503 }
1504
1505 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1506 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1507 return (jboolean) reflect->bool_field(override_offset);
1508 }
1509
1510 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1511 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1512 reflect->bool_field_put(override_offset, (int) value);
1513 }
1514
1515 void java_lang_reflect_Method::compute_offsets() {
1516 klassOop k = SystemDictionary::reflect_Method_klass();
1517 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1518 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1519 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1520 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1521 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1522 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1523 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1524 // The generic signature and annotations fields are only present in 1.5
1525 signature_offset = -1;
1526 annotations_offset = -1;
1527 parameter_annotations_offset = -1;
1528 annotation_default_offset = -1;
1529 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1530 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1531 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1532 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1533 }
1534
1535 Handle java_lang_reflect_Method::create(TRAPS) {
1536 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1537 klassOop klass = SystemDictionary::reflect_Method_klass();
1538 // This class is eagerly initialized during VM initialization, since we keep a refence
1539 // to one of the methods
1540 assert(instanceKlass::cast(klass)->is_initialized(), "must be initialized");
1541 return instanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH);
1542 }
1543
1544 oop java_lang_reflect_Method::clazz(oop reflect) {
1545 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1546 return reflect->obj_field(clazz_offset);
1547 }
1548
1549 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1550 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1551 reflect->obj_field_put(clazz_offset, value);
1552 }
1553
1554 int java_lang_reflect_Method::slot(oop reflect) {
1555 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1556 return reflect->int_field(slot_offset);
1557 }
1558
1559 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1560 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1561 reflect->int_field_put(slot_offset, value);
1562 }
1563
1564 oop java_lang_reflect_Method::name(oop method) {
1565 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1566 return method->obj_field(name_offset);
1567 }
1568
1569 void java_lang_reflect_Method::set_name(oop method, oop value) {
1570 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1571 method->obj_field_put(name_offset, value);
1572 }
1573
1574 oop java_lang_reflect_Method::return_type(oop method) {
1575 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1576 return method->obj_field(returnType_offset);
1577 }
1578
1579 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
1580 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1581 method->obj_field_put(returnType_offset, value);
1582 }
1583
1584 oop java_lang_reflect_Method::parameter_types(oop method) {
1585 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1586 return method->obj_field(parameterTypes_offset);
1587 }
1588
1589 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
1590 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1591 method->obj_field_put(parameterTypes_offset, value);
1592 }
1593
1594 oop java_lang_reflect_Method::exception_types(oop method) {
1595 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1596 return method->obj_field(exceptionTypes_offset);
1597 }
1598
1599 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
1600 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1601 method->obj_field_put(exceptionTypes_offset, value);
1602 }
1603
1604 int java_lang_reflect_Method::modifiers(oop method) {
1605 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1606 return method->int_field(modifiers_offset);
1607 }
1608
1609 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
1610 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1611 method->int_field_put(modifiers_offset, value);
1612 }
1613
1614 bool java_lang_reflect_Method::has_signature_field() {
1615 return (signature_offset >= 0);
1616 }
1617
1618 oop java_lang_reflect_Method::signature(oop method) {
1619 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1620 assert(has_signature_field(), "signature field must be present");
1621 return method->obj_field(signature_offset);
1622 }
1623
1624 void java_lang_reflect_Method::set_signature(oop method, oop value) {
1625 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1626 assert(has_signature_field(), "signature field must be present");
1627 method->obj_field_put(signature_offset, value);
1628 }
1629
1630 bool java_lang_reflect_Method::has_annotations_field() {
1631 return (annotations_offset >= 0);
1632 }
1633
1634 oop java_lang_reflect_Method::annotations(oop method) {
1635 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1636 assert(has_annotations_field(), "annotations field must be present");
1637 return method->obj_field(annotations_offset);
1638 }
1639
1640 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
1641 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1642 assert(has_annotations_field(), "annotations field must be present");
1643 method->obj_field_put(annotations_offset, value);
1644 }
1645
1646 bool java_lang_reflect_Method::has_parameter_annotations_field() {
1647 return (parameter_annotations_offset >= 0);
1648 }
1649
1650 oop java_lang_reflect_Method::parameter_annotations(oop method) {
1651 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1652 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1653 return method->obj_field(parameter_annotations_offset);
1654 }
1655
1656 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
1657 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1658 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1659 method->obj_field_put(parameter_annotations_offset, value);
1660 }
1661
1662 bool java_lang_reflect_Method::has_annotation_default_field() {
1663 return (annotation_default_offset >= 0);
1664 }
1665
1666 oop java_lang_reflect_Method::annotation_default(oop method) {
1667 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1668 assert(has_annotation_default_field(), "annotation default field must be present");
1669 return method->obj_field(annotation_default_offset);
1670 }
1671
1672 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
1673 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1674 assert(has_annotation_default_field(), "annotation default field must be present");
1675 method->obj_field_put(annotation_default_offset, value);
1676 }
1677
1678 void java_lang_reflect_Constructor::compute_offsets() {
1679 klassOop k = SystemDictionary::reflect_Constructor_klass();
1680 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1681 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1682 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1683 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1684 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1685 // The generic signature and annotations fields are only present in 1.5
1686 signature_offset = -1;
1687 annotations_offset = -1;
1688 parameter_annotations_offset = -1;
1689 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1690 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1691 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1692 }
1693
1694 Handle java_lang_reflect_Constructor::create(TRAPS) {
1695 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1696 symbolHandle name = vmSymbolHandles::java_lang_reflect_Constructor();
1697 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
1698 instanceKlassHandle klass (THREAD, k);
1699 // Ensure it is initialized
1700 klass->initialize(CHECK_NH);
1701 return klass->allocate_instance_handle(CHECK_NH);
1702 }
1703
1704 oop java_lang_reflect_Constructor::clazz(oop reflect) {
1705 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1706 return reflect->obj_field(clazz_offset);
1707 }
1708
1709 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
1710 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1711 reflect->obj_field_put(clazz_offset, value);
1712 }
1713
1714 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
1715 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1716 return constructor->obj_field(parameterTypes_offset);
1717 }
1718
1719 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
1720 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1721 constructor->obj_field_put(parameterTypes_offset, value);
1722 }
1723
1724 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
1725 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1726 return constructor->obj_field(exceptionTypes_offset);
1727 }
1728
1729 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
1730 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1731 constructor->obj_field_put(exceptionTypes_offset, value);
1732 }
1733
1734 int java_lang_reflect_Constructor::slot(oop reflect) {
1735 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1736 return reflect->int_field(slot_offset);
1737 }
1738
1739 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
1740 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1741 reflect->int_field_put(slot_offset, value);
1742 }
1743
1744 int java_lang_reflect_Constructor::modifiers(oop constructor) {
1745 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1746 return constructor->int_field(modifiers_offset);
1747 }
1748
1749 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
1750 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1751 constructor->int_field_put(modifiers_offset, value);
1752 }
1753
1754 bool java_lang_reflect_Constructor::has_signature_field() {
1755 return (signature_offset >= 0);
1756 }
1757
1758 oop java_lang_reflect_Constructor::signature(oop constructor) {
1759 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1760 assert(has_signature_field(), "signature field must be present");
1761 return constructor->obj_field(signature_offset);
1762 }
1763
1764 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
1765 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1766 assert(has_signature_field(), "signature field must be present");
1767 constructor->obj_field_put(signature_offset, value);
1768 }
1769
1770 bool java_lang_reflect_Constructor::has_annotations_field() {
1771 return (annotations_offset >= 0);
1772 }
1773
1774 oop java_lang_reflect_Constructor::annotations(oop constructor) {
1775 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1776 assert(has_annotations_field(), "annotations field must be present");
1777 return constructor->obj_field(annotations_offset);
1778 }
1779
1780 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
1781 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1782 assert(has_annotations_field(), "annotations field must be present");
1783 constructor->obj_field_put(annotations_offset, value);
1784 }
1785
1786 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
1787 return (parameter_annotations_offset >= 0);
1788 }
1789
1790 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
1791 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1792 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1793 return method->obj_field(parameter_annotations_offset);
1794 }
1795
1796 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
1797 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1798 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1799 method->obj_field_put(parameter_annotations_offset, value);
1800 }
1801
1802 void java_lang_reflect_Field::compute_offsets() {
1803 klassOop k = SystemDictionary::reflect_Field_klass();
1804 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1805 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1806 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
1807 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1808 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1809 // The generic signature and annotations fields are only present in 1.5
1810 signature_offset = -1;
1811 annotations_offset = -1;
1812 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1813 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1814 }
1815
1816 Handle java_lang_reflect_Field::create(TRAPS) {
1817 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1818 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field();
1819 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
1820 instanceKlassHandle klass (THREAD, k);
1821 // Ensure it is initialized
1822 klass->initialize(CHECK_NH);
1823 return klass->allocate_instance_handle(CHECK_NH);
1824 }
1825
1826 oop java_lang_reflect_Field::clazz(oop reflect) {
1827 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1828 return reflect->obj_field(clazz_offset);
1829 }
1830
1831 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
1832 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1833 reflect->obj_field_put(clazz_offset, value);
1834 }
1835
1836 oop java_lang_reflect_Field::name(oop field) {
1837 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1838 return field->obj_field(name_offset);
1839 }
1840
1841 void java_lang_reflect_Field::set_name(oop field, oop value) {
1842 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1843 field->obj_field_put(name_offset, value);
1844 }
1845
1846 oop java_lang_reflect_Field::type(oop field) {
1847 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1848 return field->obj_field(type_offset);
1849 }
1850
1851 void java_lang_reflect_Field::set_type(oop field, oop value) {
1852 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1853 field->obj_field_put(type_offset, value);
1854 }
1855
1856 int java_lang_reflect_Field::slot(oop reflect) {
1857 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1858 return reflect->int_field(slot_offset);
1859 }
1860
1861 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
1862 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1863 reflect->int_field_put(slot_offset, value);
1864 }
1865
1866 int java_lang_reflect_Field::modifiers(oop field) {
1867 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1868 return field->int_field(modifiers_offset);
1869 }
1870
1871 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
1872 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1873 field->int_field_put(modifiers_offset, value);
1874 }
1875
1876 bool java_lang_reflect_Field::has_signature_field() {
1877 return (signature_offset >= 0);
1878 }
1879
1880 oop java_lang_reflect_Field::signature(oop field) {
1881 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1882 assert(has_signature_field(), "signature field must be present");
1883 return field->obj_field(signature_offset);
1884 }
1885
1886 void java_lang_reflect_Field::set_signature(oop field, oop value) {
1887 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1888 assert(has_signature_field(), "signature field must be present");
1889 field->obj_field_put(signature_offset, value);
1890 }
1891
1892 bool java_lang_reflect_Field::has_annotations_field() {
1893 return (annotations_offset >= 0);
1894 }
1895
1896 oop java_lang_reflect_Field::annotations(oop field) {
1897 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1898 assert(has_annotations_field(), "annotations field must be present");
1899 return field->obj_field(annotations_offset);
1900 }
1901
1902 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
1903 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1904 assert(has_annotations_field(), "annotations field must be present");
1905 field->obj_field_put(annotations_offset, value);
1906 }
1907
1908
1909 void sun_reflect_ConstantPool::compute_offsets() {
1910 klassOop k = SystemDictionary::reflect_ConstantPool_klass();
1911 // This null test can be removed post beta
1912 if (k != NULL) {
1913 compute_offset(_cp_oop_offset, k, vmSymbols::constantPoolOop_name(), vmSymbols::object_signature());
1914 }
1915 }
1916
1917
1918 Handle sun_reflect_ConstantPool::create(TRAPS) {
1919 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1920 klassOop k = SystemDictionary::reflect_ConstantPool_klass();
1921 instanceKlassHandle klass (THREAD, k);
1922 // Ensure it is initialized
1923 klass->initialize(CHECK_NH);
1924 return klass->allocate_instance_handle(CHECK_NH);
1925 }
1926
1927
1928 oop sun_reflect_ConstantPool::cp_oop(oop reflect) {
1929 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1930 return reflect->obj_field(_cp_oop_offset);
1931 }
1932
1933
1934 void sun_reflect_ConstantPool::set_cp_oop(oop reflect, oop value) {
1935 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1936 reflect->obj_field_put(_cp_oop_offset, value);
1937 }
1938
1939 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
1940 klassOop k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
1941 // This null test can be removed post beta
1942 if (k != NULL) {
1943 compute_offset(_base_offset, k,
1944 vmSymbols::base_name(), vmSymbols::object_signature());
1945 }
1946 }
1947
1948 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
1949 klassOop k = SystemDictionary::box_klass(type);
1950 if (k == NULL) return NULL;
1951 instanceKlassHandle h (THREAD, k);
1952 if (!h->is_initialized()) h->initialize(CHECK_0);
1953 return h->allocate_instance(THREAD);
1954 }
1955
1956
1957 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
1958 oop box = initialize_and_allocate(type, CHECK_0);
1959 if (box == NULL) return NULL;
1960 switch (type) {
1961 case T_BOOLEAN:
1962 box->bool_field_put(value_offset, value->z);
1963 break;
1964 case T_CHAR:
1965 box->char_field_put(value_offset, value->c);
1966 break;
1967 case T_FLOAT:
1968 box->float_field_put(value_offset, value->f);
1969 break;
1970 case T_DOUBLE:
1971 box->double_field_put(long_value_offset, value->d);
1972 break;
1973 case T_BYTE:
1974 box->byte_field_put(value_offset, value->b);
1975 break;
1976 case T_SHORT:
1977 box->short_field_put(value_offset, value->s);
1978 break;
1979 case T_INT:
1980 box->int_field_put(value_offset, value->i);
1981 break;
1982 case T_LONG:
1983 box->long_field_put(long_value_offset, value->j);
1984 break;
1985 default:
1986 return NULL;
1987 }
1988 return box;
1989 }
1990
1991
1992 BasicType java_lang_boxing_object::basic_type(oop box) {
1993 if (box == NULL) return T_ILLEGAL;
1994 BasicType type = SystemDictionary::box_klass_type(box->klass());
1995 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
1996 return T_ILLEGAL;
1997 return type;
1998 }
1999
2000
2001 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2002 BasicType type = SystemDictionary::box_klass_type(box->klass());
2003 switch (type) {
2004 case T_BOOLEAN:
2005 value->z = box->bool_field(value_offset);
2006 break;
2007 case T_CHAR:
2008 value->c = box->char_field(value_offset);
2009 break;
2010 case T_FLOAT:
2011 value->f = box->float_field(value_offset);
2012 break;
2013 case T_DOUBLE:
2014 value->d = box->double_field(long_value_offset);
2015 break;
2016 case T_BYTE:
2017 value->b = box->byte_field(value_offset);
2018 break;
2019 case T_SHORT:
2020 value->s = box->short_field(value_offset);
2021 break;
2022 case T_INT:
2023 value->i = box->int_field(value_offset);
2024 break;
2025 case T_LONG:
2026 value->j = box->long_field(long_value_offset);
2027 break;
2028 default:
2029 return T_ILLEGAL;
2030 } // end switch
2031 return type;
2032 }
2033
2034
2035 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2036 BasicType type = SystemDictionary::box_klass_type(box->klass());
2037 switch (type) {
2038 case T_BOOLEAN:
2039 box->bool_field_put(value_offset, value->z);
2040 break;
2041 case T_CHAR:
2042 box->char_field_put(value_offset, value->c);
2043 break;
2044 case T_FLOAT:
2045 box->float_field_put(value_offset, value->f);
2046 break;
2047 case T_DOUBLE:
2048 box->double_field_put(long_value_offset, value->d);
2049 break;
2050 case T_BYTE:
2051 box->byte_field_put(value_offset, value->b);
2052 break;
2053 case T_SHORT:
2054 box->short_field_put(value_offset, value->s);
2055 break;
2056 case T_INT:
2057 box->int_field_put(value_offset, value->i);
2058 break;
2059 case T_LONG:
2060 box->long_field_put(long_value_offset, value->j);
2061 break;
2062 default:
2063 return T_ILLEGAL;
2064 } // end switch
2065 return type;
2066 }
2067
2068
2069 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2070 switch (type) {
2071 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2072 case T_CHAR: st->print("%d", value->c); break;
2073 case T_BYTE: st->print("%d", value->b); break;
2074 case T_SHORT: st->print("%d", value->s); break;
2075 case T_INT: st->print("%d", value->i); break;
2076 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2077 case T_FLOAT: st->print("%f", value->f); break;
2078 case T_DOUBLE: st->print("%lf", value->d); break;
2079 default: st->print("type %d?", type); break;
2080 }
2081 }
2082
2083
2084 // Support for java_lang_ref_Reference
2085 oop java_lang_ref_Reference::pending_list_lock() {
2086 instanceKlass* ik = instanceKlass::cast(SystemDictionary::Reference_klass());
2087 char *addr = (((char *)ik->start_of_static_fields()) + static_lock_offset);
2088 if (UseCompressedOops) {
2089 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2090 } else {
2091 return oopDesc::load_decode_heap_oop((oop*)addr);
2092 }
2093 }
2094
2095 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2096 instanceKlass* ik = instanceKlass::cast(SystemDictionary::Reference_klass());
2097 char *addr = (((char *)ik->start_of_static_fields()) + static_pending_offset);
2098 // XXX This might not be HeapWord aligned, almost rather be char *.
2099 return (HeapWord*)addr;
2100 }
2101
2102 oop java_lang_ref_Reference::pending_list() {
2103 char *addr = (char *)pending_list_addr();
2104 if (UseCompressedOops) {
2105 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2106 } else {
2107 return oopDesc::load_decode_heap_oop((oop*)addr);
2108 }
2109 }
2110
2111
2112 // Support for java_lang_ref_SoftReference
2113
2114 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2115 return ref->long_field(timestamp_offset);
2116 }
2117
2118 jlong java_lang_ref_SoftReference::clock() {
2119 instanceKlass* ik = instanceKlass::cast(SystemDictionary::SoftReference_klass());
2120 int offset = ik->offset_of_static_fields() + static_clock_offset;
2121
2122 return SystemDictionary::SoftReference_klass()->long_field(offset);
2123 }
2124
2125 void java_lang_ref_SoftReference::set_clock(jlong value) {
2126 instanceKlass* ik = instanceKlass::cast(SystemDictionary::SoftReference_klass());
2127 int offset = ik->offset_of_static_fields() + static_clock_offset;
2128
2129 SystemDictionary::SoftReference_klass()->long_field_put(offset, value);
2130 }
2131
2132
2133 // Support for java_dyn_MethodHandle
2134
2135 int java_dyn_MethodHandle::_type_offset;
2136 int java_dyn_MethodHandle::_vmtarget_offset;
2137 int java_dyn_MethodHandle::_vmentry_offset;
2138 int java_dyn_MethodHandle::_vmslots_offset;
2139
2140 int sun_dyn_MemberName::_clazz_offset;
2141 int sun_dyn_MemberName::_name_offset;
2142 int sun_dyn_MemberName::_type_offset;
2143 int sun_dyn_MemberName::_flags_offset;
2144 int sun_dyn_MemberName::_vmtarget_offset;
2145 int sun_dyn_MemberName::_vmindex_offset;
2146
2147 int sun_dyn_DirectMethodHandle::_vmindex_offset;
2148
2149 int sun_dyn_BoundMethodHandle::_argument_offset;
2150 int sun_dyn_BoundMethodHandle::_vmargslot_offset;
2151
2152 int sun_dyn_AdapterMethodHandle::_conversion_offset;
2153
2154 void java_dyn_MethodHandle::compute_offsets() {
2155 klassOop k = SystemDictionary::MethodHandle_klass();
2156 if (k != NULL && EnableMethodHandles) {
2157 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::java_dyn_MethodType_signature(), true);
2158 compute_offset(_vmtarget_offset, k, vmSymbols::vmtarget_name(), vmSymbols::object_signature(), true);
2159 compute_offset(_vmentry_offset, k, vmSymbols::vmentry_name(), vmSymbols::machine_word_signature(), true);
2160
2161 // Note: MH.vmslots (if it is present) is a hoisted copy of MH.type.form.vmslots.
2162 // It is optional pending experiments to keep or toss.
2163 compute_optional_offset(_vmslots_offset, k, vmSymbols::vmslots_name(), vmSymbols::int_signature(), true);
2164 }
2165 }
2166
2167 void sun_dyn_MemberName::compute_offsets() {
2168 klassOop k = SystemDictionary::MemberName_klass();
2169 if (k != NULL && EnableMethodHandles) {
2170 compute_offset(_clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2171 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2172 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::object_signature());
2173 compute_offset(_flags_offset, k, vmSymbols::flags_name(), vmSymbols::int_signature());
2174 compute_offset(_vmtarget_offset, k, vmSymbols::vmtarget_name(), vmSymbols::object_signature());
2175 compute_offset(_vmindex_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature());
2176 }
2177 }
2178
2179 void sun_dyn_DirectMethodHandle::compute_offsets() {
2180 klassOop k = SystemDictionary::DirectMethodHandle_klass();
2181 if (k != NULL && EnableMethodHandles) {
2182 compute_offset(_vmindex_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature(), true);
2183 }
2184 }
2185
2186 void sun_dyn_BoundMethodHandle::compute_offsets() {
2187 klassOop k = SystemDictionary::BoundMethodHandle_klass();
2188 if (k != NULL && EnableMethodHandles) {
2189 compute_offset(_vmargslot_offset, k, vmSymbols::vmargslot_name(), vmSymbols::int_signature(), true);
2190 compute_offset(_argument_offset, k, vmSymbols::argument_name(), vmSymbols::object_signature(), true);
2191 }
2192 }
2193
2194 void sun_dyn_AdapterMethodHandle::compute_offsets() {
2195 klassOop k = SystemDictionary::AdapterMethodHandle_klass();
2196 if (k != NULL && EnableMethodHandles) {
2197 compute_offset(_conversion_offset, k, vmSymbols::conversion_name(), vmSymbols::int_signature(), true);
2198 }
2199 }
2200
2201 oop java_dyn_MethodHandle::type(oop mh) {
2202 return mh->obj_field(_type_offset);
2203 }
2204
2205 void java_dyn_MethodHandle::set_type(oop mh, oop mtype) {
2206 mh->obj_field_put(_type_offset, mtype);
2207 }
2208
2209 int java_dyn_MethodHandle::vmslots(oop mh) {
2210 int vmslots_offset = _vmslots_offset;
2211 if (vmslots_offset != 0) {
2212 #ifdef ASSERT
2213 int x = mh->int_field(vmslots_offset);
2214 int y = compute_vmslots(mh);
2215 assert(x == y, "correct hoisted value");
2216 #endif
2217 return mh->int_field(vmslots_offset);
2218 } else {
2219 return compute_vmslots(mh);
2220 }
2221 }
2222
2223 // if MH.vmslots exists, hoist into it the value of type.form.vmslots
2224 void java_dyn_MethodHandle::init_vmslots(oop mh) {
2225 int vmslots_offset = _vmslots_offset;
2226 if (vmslots_offset != 0) {
2227 mh->int_field_put(vmslots_offset, compute_vmslots(mh));
2228 }
2229 }
2230
2231 // fetch type.form.vmslots, which is the number of JVM stack slots
2232 // required to carry the arguments of this MH
2233 int java_dyn_MethodHandle::compute_vmslots(oop mh) {
2234 oop mtype = type(mh);
2235 if (mtype == NULL) return 0; // Java code would get NPE
2236 oop form = java_dyn_MethodType::form(mtype);
2237 if (form == NULL) return 0; // Java code would get NPE
2238 return java_dyn_MethodTypeForm::vmslots(form);
2239 }
2240
2241 // fetch the low-level entry point for this mh
2242 MethodHandleEntry* java_dyn_MethodHandle::vmentry(oop mh) {
2243 return (MethodHandleEntry*) mh->address_field(_vmentry_offset);
2244 }
2245
2246 void java_dyn_MethodHandle::set_vmentry(oop mh, MethodHandleEntry* me) {
2247 assert(_vmentry_offset != 0, "must be present");
2248
2249 // This is always the final step that initializes a valid method handle:
2250 mh->release_address_field_put(_vmentry_offset, (address) me);
2251
2252 // There should be enough memory barriers on exit from native methods
2253 // to ensure that the MH is fully initialized to all threads before
2254 // Java code can publish it in global data structures.
2255 // But just in case, we use release_address_field_put.
2256 }
2257
2258 /// MemberName accessors
2259
2260 oop sun_dyn_MemberName::clazz(oop mname) {
2261 assert(is_instance(mname), "wrong type");
2262 return mname->obj_field(_clazz_offset);
2263 }
2264
2265 void sun_dyn_MemberName::set_clazz(oop mname, oop clazz) {
2266 assert(is_instance(mname), "wrong type");
2267 mname->obj_field_put(_clazz_offset, clazz);
2268 }
2269
2270 oop sun_dyn_MemberName::name(oop mname) {
2271 assert(is_instance(mname), "wrong type");
2272 return mname->obj_field(_name_offset);
2273 }
2274
2275 void sun_dyn_MemberName::set_name(oop mname, oop name) {
2276 assert(is_instance(mname), "wrong type");
2277 mname->obj_field_put(_name_offset, name);
2278 }
2279
2280 oop sun_dyn_MemberName::type(oop mname) {
2281 assert(is_instance(mname), "wrong type");
2282 return mname->obj_field(_type_offset);
2283 }
2284
2285 void sun_dyn_MemberName::set_type(oop mname, oop type) {
2286 assert(is_instance(mname), "wrong type");
2287 mname->obj_field_put(_type_offset, type);
2288 }
2289
2290 int sun_dyn_MemberName::flags(oop mname) {
2291 assert(is_instance(mname), "wrong type");
2292 return mname->int_field(_flags_offset);
2293 }
2294
2295 void sun_dyn_MemberName::set_flags(oop mname, int flags) {
2296 assert(is_instance(mname), "wrong type");
2297 mname->int_field_put(_flags_offset, flags);
2298 }
2299
2300 oop sun_dyn_MemberName::vmtarget(oop mname) {
2301 assert(is_instance(mname), "wrong type");
2302 return mname->obj_field(_vmtarget_offset);
2303 }
2304
2305 void sun_dyn_MemberName::set_vmtarget(oop mname, oop ref) {
2306 assert(is_instance(mname), "wrong type");
2307 mname->obj_field_put(_vmtarget_offset, ref);
2308 }
2309
2310 int sun_dyn_MemberName::vmindex(oop mname) {
2311 assert(is_instance(mname), "wrong type");
2312 return mname->int_field(_vmindex_offset);
2313 }
2314
2315 void sun_dyn_MemberName::set_vmindex(oop mname, int index) {
2316 assert(is_instance(mname), "wrong type");
2317 mname->int_field_put(_vmindex_offset, index);
2318 }
2319
2320 oop java_dyn_MethodHandle::vmtarget(oop mh) {
2321 assert(is_instance(mh), "MH only");
2322 return mh->obj_field(_vmtarget_offset);
2323 }
2324
2325 void java_dyn_MethodHandle::set_vmtarget(oop mh, oop ref) {
2326 assert(is_instance(mh), "MH only");
2327 mh->obj_field_put(_vmtarget_offset, ref);
2328 }
2329
2330 int sun_dyn_DirectMethodHandle::vmindex(oop mh) {
2331 assert(is_instance(mh), "DMH only");
2332 return mh->int_field(_vmindex_offset);
2333 }
2334
2335 void sun_dyn_DirectMethodHandle::set_vmindex(oop mh, int index) {
2336 assert(is_instance(mh), "DMH only");
2337 mh->int_field_put(_vmindex_offset, index);
2338 }
2339
2340 int sun_dyn_BoundMethodHandle::vmargslot(oop mh) {
2341 assert(is_instance(mh), "BMH only");
2342 return mh->int_field(_vmargslot_offset);
2343 }
2344
2345 oop sun_dyn_BoundMethodHandle::argument(oop mh) {
2346 assert(is_instance(mh), "BMH only");
2347 return mh->obj_field(_argument_offset);
2348 }
2349
2350 int sun_dyn_AdapterMethodHandle::conversion(oop mh) {
2351 assert(is_instance(mh), "AMH only");
2352 return mh->int_field(_conversion_offset);
2353 }
2354
2355 void sun_dyn_AdapterMethodHandle::set_conversion(oop mh, int conv) {
2356 assert(is_instance(mh), "AMH only");
2357 mh->int_field_put(_conversion_offset, conv);
2358 }
2359
2360
2361 // Support for java_dyn_MethodType
2362
2363 int java_dyn_MethodType::_rtype_offset;
2364 int java_dyn_MethodType::_ptypes_offset;
2365 int java_dyn_MethodType::_form_offset;
2366
2367 void java_dyn_MethodType::compute_offsets() {
2368 klassOop k = SystemDictionary::MethodType_klass();
2369 if (k != NULL) {
2370 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2371 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2372 compute_offset(_form_offset, k, vmSymbols::form_name(), vmSymbols::java_dyn_MethodTypeForm_signature());
2373 }
2374 }
2375
2376 void java_dyn_MethodType::print_signature(oop mt, outputStream* st) {
2377 st->print("(");
2378 objArrayOop pts = ptypes(mt);
2379 for (int i = 0, limit = pts->length(); i < limit; i++) {
2380 java_lang_Class::print_signature(pts->obj_at(i), st);
2381 }
2382 st->print(")");
2383 java_lang_Class::print_signature(rtype(mt), st);
2384 }
2385
2386 symbolOop java_dyn_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2387 ResourceMark rm;
2388 stringStream buffer(128);
2389 print_signature(mt, &buffer);
2390 const char* sigstr = buffer.base();
2391 int siglen = (int) buffer.size();
2392 if (!intern_if_not_found)
2393 return SymbolTable::probe(sigstr, siglen);
2394 else
2395 return oopFactory::new_symbol(sigstr, siglen, THREAD);
2396 }
2397
2398 oop java_dyn_MethodType::rtype(oop mt) {
2399 assert(is_instance(mt), "must be a MethodType");
2400 return mt->obj_field(_rtype_offset);
2401 }
2402
2403 objArrayOop java_dyn_MethodType::ptypes(oop mt) {
2404 assert(is_instance(mt), "must be a MethodType");
2405 return (objArrayOop) mt->obj_field(_ptypes_offset);
2406 }
2407
2408 oop java_dyn_MethodType::form(oop mt) {
2409 assert(is_instance(mt), "must be a MethodType");
2410 return mt->obj_field(_form_offset);
2411 }
2412
2413 oop java_dyn_MethodType::ptype(oop mt, int idx) {
2414 return ptypes(mt)->obj_at(idx);
2415 }
2416
2417 int java_dyn_MethodType::ptype_count(oop mt) {
2418 return ptypes(mt)->length();
2419 }
2420
2421
2422
2423 // Support for java_dyn_MethodTypeForm
2424
2425 int java_dyn_MethodTypeForm::_vmslots_offset;
2426 int java_dyn_MethodTypeForm::_erasedType_offset;
2427 int java_dyn_MethodTypeForm::_genericInvoker_offset;
2428
2429 void java_dyn_MethodTypeForm::compute_offsets() {
2430 klassOop k = SystemDictionary::MethodTypeForm_klass();
2431 if (k != NULL) {
2432 compute_optional_offset(_vmslots_offset, k, vmSymbols::vmslots_name(), vmSymbols::int_signature(), true);
2433 compute_optional_offset(_erasedType_offset, k, vmSymbols::erasedType_name(), vmSymbols::java_dyn_MethodType_signature(), true);
2434 compute_optional_offset(_genericInvoker_offset, k, vmSymbols::genericInvoker_name(), vmSymbols::java_dyn_MethodHandle_signature(), true);
2435 if (_genericInvoker_offset == 0) _genericInvoker_offset = -1; // set to explicit "empty" value
2436 }
2437 }
2438
2439 int java_dyn_MethodTypeForm::vmslots(oop mtform) {
2440 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only");
2441 return mtform->int_field(_vmslots_offset);
2442 }
2443
2444 oop java_dyn_MethodTypeForm::erasedType(oop mtform) {
2445 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only");
2446 return mtform->obj_field(_erasedType_offset);
2447 }
2448
2449 oop java_dyn_MethodTypeForm::genericInvoker(oop mtform) {
2450 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only");
2451 return mtform->obj_field(_genericInvoker_offset);
2452 }
2453
2454
2455 // Support for java_dyn_CallSite
2456
2457 int java_dyn_CallSite::_target_offset;
2458 int java_dyn_CallSite::_caller_method_offset;
2459 int java_dyn_CallSite::_caller_bci_offset;
2460
2461 void java_dyn_CallSite::compute_offsets() {
2462 if (!EnableInvokeDynamic) return;
2463 klassOop k = SystemDictionary::CallSite_klass();
2464 if (k != NULL) {
2465 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_dyn_MethodHandle_signature());
2466 compute_offset(_caller_method_offset, k, vmSymbols::vmmethod_name(), vmSymbols::sun_dyn_MemberName_signature());
2467 compute_offset(_caller_bci_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature());
2468 }
2469 }
2470
2471 oop java_dyn_CallSite::target(oop site) {
2472 return site->obj_field(_target_offset);
2473 }
2474
2475 void java_dyn_CallSite::set_target(oop site, oop target) {
2476 site->obj_field_put(_target_offset, target);
2477 }
2478
2479 oop java_dyn_CallSite::caller_method(oop site) {
2480 return site->obj_field(_caller_method_offset);
2481 }
2482
2483 void java_dyn_CallSite::set_caller_method(oop site, oop ref) {
2484 site->obj_field_put(_caller_method_offset, ref);
2485 }
2486
2487 jint java_dyn_CallSite::caller_bci(oop site) {
2488 return site->int_field(_caller_bci_offset);
2489 }
2490
2491 void java_dyn_CallSite::set_caller_bci(oop site, jint bci) {
2492 site->int_field_put(_caller_bci_offset, bci);
2493 }
2494
2495
2496 // Support for java_security_AccessControlContext
2497
2498 int java_security_AccessControlContext::_context_offset = 0;
2499 int java_security_AccessControlContext::_privilegedContext_offset = 0;
2500 int java_security_AccessControlContext::_isPrivileged_offset = 0;
2501
2502 void java_security_AccessControlContext::compute_offsets() {
2503 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
2504 fieldDescriptor fd;
2505 instanceKlass* ik = instanceKlass::cast(SystemDictionary::AccessControlContext_klass());
2506
2507 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
2508 fatal("Invalid layout of java.security.AccessControlContext");
2509 }
2510 _context_offset = fd.offset();
2511
2512 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
2513 fatal("Invalid layout of java.security.AccessControlContext");
2514 }
2515 _privilegedContext_offset = fd.offset();
2516
2517 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
2518 fatal("Invalid layout of java.security.AccessControlContext");
2519 }
2520 _isPrivileged_offset = fd.offset();
2521 }
2522
2523
2524 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
2525 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
2526 // Ensure klass is initialized
2527 instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
2528 // Allocate result
2529 oop result = instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
2530 // Fill in values
2531 result->obj_field_put(_context_offset, context());
2532 result->obj_field_put(_privilegedContext_offset, privileged_context());
2533 result->bool_field_put(_isPrivileged_offset, isPrivileged);
2534 return result;
2535 }
2536
2537
2538 // Support for java_lang_ClassLoader
2539
2540 oop java_lang_ClassLoader::parent(oop loader) {
2541 assert(loader->is_oop(), "loader must be oop");
2542 return loader->obj_field(parent_offset);
2543 }
2544
2545
2546 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
2547 // Fix for 4474172; see evaluation for more details
2548 loader = non_reflection_class_loader(loader);
2549
2550 oop cl = SystemDictionary::java_system_loader();
2551 while(cl != NULL) {
2552 if (cl == loader) return true;
2553 cl = parent(cl);
2554 }
2555 return false;
2556 }
2557
2558 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
2559 if (loader != NULL) {
2560 // See whether this is one of the class loaders associated with
2561 // the generated bytecodes for reflection, and if so, "magically"
2562 // delegate to its parent to prevent class loading from occurring
2563 // in places where applications using reflection didn't expect it.
2564 klassOop delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
2565 // This might be null in non-1.4 JDKs
2566 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
2567 return parent(loader);
2568 }
2569 }
2570 return loader;
2571 }
2572
2573
2574 // Support for java_lang_System
2575
2576 void java_lang_System::compute_offsets() {
2577 assert(offset_of_static_fields == 0, "offsets should be initialized only once");
2578
2579 instanceKlass* ik = instanceKlass::cast(SystemDictionary::System_klass());
2580 offset_of_static_fields = ik->offset_of_static_fields();
2581 }
2582
2583 int java_lang_System::in_offset_in_bytes() {
2584 return (offset_of_static_fields + static_in_offset);
2585 }
2586
2587
2588 int java_lang_System::out_offset_in_bytes() {
2589 return (offset_of_static_fields + static_out_offset);
2590 }
2591
2592
2593 int java_lang_System::err_offset_in_bytes() {
2594 return (offset_of_static_fields + static_err_offset);
2595 }
2596
2597
2598
2599 int java_lang_String::value_offset;
2600 int java_lang_String::offset_offset;
2601 int java_lang_String::count_offset;
2602 int java_lang_String::hash_offset;
2603 int java_lang_Class::klass_offset;
2604 int java_lang_Class::array_klass_offset;
2605 int java_lang_Class::resolved_constructor_offset;
2606 int java_lang_Class::number_of_fake_oop_fields;
2607 int java_lang_Throwable::backtrace_offset;
2608 int java_lang_Throwable::detailMessage_offset;
2609 int java_lang_Throwable::cause_offset;
2610 int java_lang_Throwable::stackTrace_offset;
2611 int java_lang_reflect_AccessibleObject::override_offset;
2612 int java_lang_reflect_Method::clazz_offset;
2613 int java_lang_reflect_Method::name_offset;
2614 int java_lang_reflect_Method::returnType_offset;
2615 int java_lang_reflect_Method::parameterTypes_offset;
2616 int java_lang_reflect_Method::exceptionTypes_offset;
2617 int java_lang_reflect_Method::slot_offset;
2618 int java_lang_reflect_Method::modifiers_offset;
2619 int java_lang_reflect_Method::signature_offset;
2620 int java_lang_reflect_Method::annotations_offset;
2621 int java_lang_reflect_Method::parameter_annotations_offset;
2622 int java_lang_reflect_Method::annotation_default_offset;
2623 int java_lang_reflect_Constructor::clazz_offset;
2624 int java_lang_reflect_Constructor::parameterTypes_offset;
2625 int java_lang_reflect_Constructor::exceptionTypes_offset;
2626 int java_lang_reflect_Constructor::slot_offset;
2627 int java_lang_reflect_Constructor::modifiers_offset;
2628 int java_lang_reflect_Constructor::signature_offset;
2629 int java_lang_reflect_Constructor::annotations_offset;
2630 int java_lang_reflect_Constructor::parameter_annotations_offset;
2631 int java_lang_reflect_Field::clazz_offset;
2632 int java_lang_reflect_Field::name_offset;
2633 int java_lang_reflect_Field::type_offset;
2634 int java_lang_reflect_Field::slot_offset;
2635 int java_lang_reflect_Field::modifiers_offset;
2636 int java_lang_reflect_Field::signature_offset;
2637 int java_lang_reflect_Field::annotations_offset;
2638 int java_lang_boxing_object::value_offset;
2639 int java_lang_boxing_object::long_value_offset;
2640 int java_lang_ref_Reference::referent_offset;
2641 int java_lang_ref_Reference::queue_offset;
2642 int java_lang_ref_Reference::next_offset;
2643 int java_lang_ref_Reference::discovered_offset;
2644 int java_lang_ref_Reference::static_lock_offset;
2645 int java_lang_ref_Reference::static_pending_offset;
2646 int java_lang_ref_Reference::number_of_fake_oop_fields;
2647 int java_lang_ref_SoftReference::timestamp_offset;
2648 int java_lang_ref_SoftReference::static_clock_offset;
2649 int java_lang_ClassLoader::parent_offset;
2650 int java_lang_System::offset_of_static_fields;
2651 int java_lang_System::static_in_offset;
2652 int java_lang_System::static_out_offset;
2653 int java_lang_System::static_err_offset;
2654 int java_lang_StackTraceElement::declaringClass_offset;
2655 int java_lang_StackTraceElement::methodName_offset;
2656 int java_lang_StackTraceElement::fileName_offset;
2657 int java_lang_StackTraceElement::lineNumber_offset;
2658 int java_lang_AssertionStatusDirectives::classes_offset;
2659 int java_lang_AssertionStatusDirectives::classEnabled_offset;
2660 int java_lang_AssertionStatusDirectives::packages_offset;
2661 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
2662 int java_lang_AssertionStatusDirectives::deflt_offset;
2663 int java_nio_Buffer::_limit_offset;
2664 int sun_misc_AtomicLongCSImpl::_value_offset;
2665 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
2666 int sun_reflect_ConstantPool::_cp_oop_offset;
2667 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
2668
2669
2670 // Support for java_lang_StackTraceElement
2671
2672 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
2673 element->obj_field_put(fileName_offset, value);
2674 }
2675
2676 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
2677 element->obj_field_put(declaringClass_offset, value);
2678 }
2679
2680 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
2681 element->obj_field_put(methodName_offset, value);
2682 }
2683
2684 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
2685 element->int_field_put(lineNumber_offset, value);
2686 }
2687
2688
2689 // Support for java Assertions - java_lang_AssertionStatusDirectives.
2690
2691 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
2692 o->obj_field_put(classes_offset, val);
2693 }
2694
2695 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
2696 o->obj_field_put(classEnabled_offset, val);
2697 }
2698
2699 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
2700 o->obj_field_put(packages_offset, val);
2701 }
2702
2703 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
2704 o->obj_field_put(packageEnabled_offset, val);
2705 }
2706
2707 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
2708 o->bool_field_put(deflt_offset, val);
2709 }
2710
2711
2712 // Support for intrinsification of java.nio.Buffer.checkIndex
2713 int java_nio_Buffer::limit_offset() {
2714 return _limit_offset;
2715 }
2716
2717
2718 void java_nio_Buffer::compute_offsets() {
2719 klassOop k = SystemDictionary::java_nio_Buffer_klass();
2720 assert(k != NULL, "must be loaded in 1.4+");
2721 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
2722 }
2723
2724 // Support for intrinsification of sun.misc.AtomicLongCSImpl.attemptUpdate
2725 int sun_misc_AtomicLongCSImpl::value_offset() {
2726 assert(SystemDictionary::sun_misc_AtomicLongCSImpl_klass() != NULL, "can't call this");
2727 return _value_offset;
2728 }
2729
2730
2731 void sun_misc_AtomicLongCSImpl::compute_offsets() {
2732 klassOop k = SystemDictionary::sun_misc_AtomicLongCSImpl_klass();
2733 // If this class is not present, its value field offset won't be referenced.
2734 if (k != NULL) {
2735 compute_offset(_value_offset, k, vmSymbols::value_name(), vmSymbols::long_signature());
2736 }
2737 }
2738
2739 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
2740 if (_owner_offset != 0) return;
2741
2742 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
2743 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
2744 klassOop k = SystemDictionary::abstract_ownable_synchronizer_klass();
2745 compute_offset(_owner_offset, k,
2746 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
2747 }
2748
2749 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
2750 assert(_owner_offset != 0, "Must be initialized");
2751 return obj->obj_field(_owner_offset);
2752 }
2753
2754 // Compute hard-coded offsets
2755 // Invoked before SystemDictionary::initialize, so pre-loaded classes
2756 // are not available to determine the offset_of_static_fields.
2757 void JavaClasses::compute_hard_coded_offsets() {
2758 const int x = heapOopSize;
2759 const int header = instanceOopDesc::base_offset_in_bytes();
2760
2761 // Do the String Class
2762 java_lang_String::value_offset = java_lang_String::hc_value_offset * x + header;
2763 java_lang_String::offset_offset = java_lang_String::hc_offset_offset * x + header;
2764 java_lang_String::count_offset = java_lang_String::offset_offset + sizeof (jint);
2765 java_lang_String::hash_offset = java_lang_String::count_offset + sizeof (jint);
2766
2767 // Do the Class Class
2768 java_lang_Class::klass_offset = java_lang_Class::hc_klass_offset * x + header;
2769 java_lang_Class::array_klass_offset = java_lang_Class::hc_array_klass_offset * x + header;
2770 java_lang_Class::resolved_constructor_offset = java_lang_Class::hc_resolved_constructor_offset * x + header;
2771
2772 // This is NOT an offset
2773 java_lang_Class::number_of_fake_oop_fields = java_lang_Class::hc_number_of_fake_oop_fields;
2774
2775 // Throwable Class
2776 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
2777 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
2778 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
2779 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
2780
2781 // java_lang_boxing_object
2782 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
2783 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
2784
2785 // java_lang_ref_Reference:
2786 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
2787 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
2788 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
2789 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
2790 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
2791 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
2792 // Artificial fields for java_lang_ref_Reference
2793 // The first field is for the discovered field added in 1.4
2794 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
2795
2796 // java_lang_ref_SoftReference Class
2797 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
2798 // Don't multiply static fields because they are always in wordSize units
2799 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
2800
2801 // java_lang_ClassLoader
2802 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
2803
2804 // java_lang_System
2805 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
2806 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
2807 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
2808
2809 // java_lang_StackTraceElement
2810 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
2811 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
2812 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
2813 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
2814 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
2815 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
2816 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
2817 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
2818 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
2819
2820 }
2821
2822
2823 // Compute non-hard-coded field offsets of all the classes in this file
2824 void JavaClasses::compute_offsets() {
2825
2826 java_lang_Class::compute_offsets();
2827 java_lang_System::compute_offsets();
2828 java_lang_Thread::compute_offsets();
2829 java_lang_ThreadGroup::compute_offsets();
2830 if (EnableMethodHandles) {
2831 java_dyn_MethodHandle::compute_offsets();
2832 sun_dyn_MemberName::compute_offsets();
2833 sun_dyn_DirectMethodHandle::compute_offsets();
2834 sun_dyn_BoundMethodHandle::compute_offsets();
2835 sun_dyn_AdapterMethodHandle::compute_offsets();
2836 java_dyn_MethodType::compute_offsets();
2837 java_dyn_MethodTypeForm::compute_offsets();
2838 }
2839 if (EnableInvokeDynamic) {
2840 java_dyn_CallSite::compute_offsets();
2841 }
2842 java_security_AccessControlContext::compute_offsets();
2843 // Initialize reflection classes. The layouts of these classes
2844 // changed with the new reflection implementation in JDK 1.4, and
2845 // since the Universe doesn't know what JDK version it is until this
2846 // point we defer computation of these offsets until now.
2847 java_lang_reflect_AccessibleObject::compute_offsets();
2848 java_lang_reflect_Method::compute_offsets();
2849 java_lang_reflect_Constructor::compute_offsets();
2850 java_lang_reflect_Field::compute_offsets();
2851 if (JDK_Version::is_gte_jdk14x_version()) {
2852 java_nio_Buffer::compute_offsets();
2853 }
2854 if (JDK_Version::is_gte_jdk15x_version()) {
2855 sun_reflect_ConstantPool::compute_offsets();
2856 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
2857 }
2858 sun_misc_AtomicLongCSImpl::compute_offsets();
2859
2860 // generated interpreter code wants to know about the offsets we just computed:
2861 AbstractAssembler::update_delayed_values();
2862 }
2863
2864 #ifndef PRODUCT
2865
2866 // These functions exist to assert the validity of hard-coded field offsets to guard
2867 // against changes in the class files
2868
2869 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
2870 EXCEPTION_MARK;
2871 fieldDescriptor fd;
2872 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH);
2873 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
2874 instanceKlassHandle h_klass (THREAD, k);
2875 //instanceKlassHandle h_klass(klass);
2876 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH);
2877 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH);
2878 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) {
2879 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
2880 return false;
2881 }
2882 if (fd.is_static()) {
2883 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
2884 return false;
2885 }
2886 if (fd.offset() == hardcoded_offset ) {
2887 return true;
2888 } else {
2889 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
2890 klass_name, field_name, hardcoded_offset, fd.offset());
2891 return false;
2892 }
2893 }
2894
2895
2896 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
2897 EXCEPTION_MARK;
2898 fieldDescriptor fd;
2899 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH);
2900 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
2901 instanceKlassHandle h_klass (THREAD, k);
2902 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH);
2903 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH);
2904 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) {
2905 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
2906 return false;
2907 }
2908 if (!fd.is_static()) {
2909 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
2910 return false;
2911 }
2912 if (fd.offset() == hardcoded_offset + h_klass->offset_of_static_fields()) {
2913 return true;
2914 } else {
2915 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() - h_klass->offset_of_static_fields());
2916 return false;
2917 }
2918 }
2919
2920
2921 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
2922 EXCEPTION_MARK;
2923 fieldDescriptor fd;
2924 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH);
2925 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
2926 instanceKlassHandle h_klass (THREAD, k);
2927 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH);
2928 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH);
2929 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) {
2930 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
2931 return false;
2932 }
2933 if (!fd.is_static() || !fd.has_initial_value()) {
2934 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
2935 return false;
2936 }
2937 if (!fd.initial_value_tag().is_int()) {
2938 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
2939 return false;
2940 }
2941 jint field_value = fd.int_initial_value();
2942 if (field_value == hardcoded_constant) {
2943 return true;
2944 } else {
2945 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);
2946 return false;
2947 }
2948 }
2949
2950
2951 // Check the hard-coded field offsets of all the classes in this file
2952
2953 void JavaClasses::check_offsets() {
2954 bool valid = true;
2955
2956 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
2957 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
2958
2959 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
2960 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
2961
2962 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
2963 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
2964
2965 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
2966 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
2967
2968 // java.lang.String
2969
2970 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
2971 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
2972 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
2973 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
2974
2975 // java.lang.Class
2976
2977 // Fake fields
2978 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
2979 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
2980 // CHECK_OFFSET("java/lang/Class", java_lang_Class, resolved_constructor); // %%% this needs to be checked
2981
2982 // java.lang.Throwable
2983
2984 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
2985 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
2986 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
2987 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
2988
2989 // Boxed primitive objects (java_lang_boxing_object)
2990
2991 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
2992 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
2993 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
2994 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
2995 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
2996 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
2997 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
2998 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
2999
3000 // java.lang.ClassLoader
3001
3002 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3003
3004 // java.lang.System
3005
3006 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3007 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3008 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3009
3010 // java.lang.StackTraceElement
3011
3012 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3013 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3014 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3015 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3016
3017 // java.lang.ref.Reference
3018
3019 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3020 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3021 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3022 // Fake field
3023 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3024 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3025 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3026
3027 // java.lang.ref.SoftReference
3028
3029 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3030 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3031
3032 // java.lang.AssertionStatusDirectives
3033 //
3034 // The CheckAssertionStatusDirectives boolean can be removed from here and
3035 // globals.hpp after the AssertionStatusDirectives class has been integrated
3036 // into merlin "for some time." Without it, the vm will fail with early
3037 // merlin builds.
3038
3039 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) {
3040 const char* nm = "java/lang/AssertionStatusDirectives";
3041 const char* sig = "[Ljava/lang/String;";
3042 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3043 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3044 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3045 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3046 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3047 }
3048
3049 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3050 }
3051
3052 #endif // PRODUCT
3053
3054 void javaClasses_init() {
3055 JavaClasses::compute_offsets();
3056 JavaClasses::check_offsets();
3057 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3058 }