1 /*
2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/javaClasses.hpp"
27 #include "classfile/symbolTable.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "code/debugInfo.hpp"
30 #include "code/pcDesc.hpp"
31 #include "interpreter/interpreter.hpp"
32 #include "memory/oopFactory.hpp"
33 #include "memory/resourceArea.hpp"
34 #include "memory/universe.inline.hpp"
35 #include "oops/instanceKlass.hpp"
36 #include "oops/klass.hpp"
37 #include "oops/klassOop.hpp"
38 #include "oops/methodOop.hpp"
39 #include "oops/symbol.hpp"
40 #include "oops/typeArrayOop.hpp"
41 #include "runtime/fieldDescriptor.hpp"
42 #include "runtime/handles.inline.hpp"
43 #include "runtime/interfaceSupport.hpp"
44 #include "runtime/java.hpp"
45 #include "runtime/javaCalls.hpp"
46 #include "runtime/safepoint.hpp"
47 #include "runtime/vframe.hpp"
48 #include "utilities/preserveException.hpp"
49 #ifdef TARGET_OS_FAMILY_linux
50 # include "thread_linux.inline.hpp"
51 #endif
52 #ifdef TARGET_OS_FAMILY_solaris
53 # include "thread_solaris.inline.hpp"
54 #endif
55 #ifdef TARGET_OS_FAMILY_windows
56 # include "thread_windows.inline.hpp"
57 #endif
58
59 static bool find_field(instanceKlass* ik,
60 Symbol* name_symbol, Symbol* signature_symbol,
61 fieldDescriptor* fd,
62 bool allow_super = false) {
63 if (allow_super)
64 return ik->find_field(name_symbol, signature_symbol, fd) != NULL;
65 else
66 return ik->find_local_field(name_symbol, signature_symbol, fd);
67 }
68
69 static bool find_hacked_field(instanceKlass* ik,
70 Symbol* name_symbol, Symbol* signature_symbol,
71 fieldDescriptor* fd,
72 bool allow_super = false) {
73 bool found = find_field(ik, name_symbol, signature_symbol, fd, allow_super);
74 if (!found && AllowTransitionalJSR292) {
75 Symbol* backup_sig = SystemDictionary::find_backup_signature(signature_symbol);
76 if (backup_sig != NULL) {
77 found = find_field(ik, name_symbol, backup_sig, fd, allow_super);
78 if (TraceMethodHandles) {
79 ResourceMark rm;
80 tty->print_cr("MethodHandles: %s.%s: backup for %s => %s%s",
81 ik->name()->as_C_string(), name_symbol->as_C_string(),
82 signature_symbol->as_C_string(), backup_sig->as_C_string(),
83 (found ? "" : " (NOT FOUND)"));
84 }
85 }
86 }
87 return found;
88 }
89 #define find_field find_hacked_field /* remove after AllowTransitionalJSR292 */
90
91 // Helpful routine for computing field offsets at run time rather than hardcoding them
92 static void
93 compute_offset(int &dest_offset,
94 klassOop klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
95 bool allow_super = false) {
96 fieldDescriptor fd;
97 instanceKlass* ik = instanceKlass::cast(klass_oop);
98 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
99 ResourceMark rm;
100 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
101 fatal("Invalid layout of preloaded class");
102 }
103 dest_offset = fd.offset();
104 }
105
106 // Same as above but for "optional" offsets that might not be present in certain JDK versions
107 static void
108 compute_optional_offset(int& dest_offset,
109 klassOop klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
110 bool allow_super = false) {
111 fieldDescriptor fd;
112 instanceKlass* ik = instanceKlass::cast(klass_oop);
113 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
114 dest_offset = fd.offset();
115 }
116 }
117
118
119 Handle java_lang_String::basic_create(int length, bool tenured, TRAPS) {
120 // Create the String object first, so there's a chance that the String
121 // and the char array it points to end up in the same cache line.
122 oop obj;
123 if (tenured) {
124 obj = instanceKlass::cast(SystemDictionary::String_klass())->allocate_permanent_instance(CHECK_NH);
125 } else {
126 obj = instanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH);
127 }
128
129 // Create the char array. The String object must be handlized here
130 // because GC can happen as a result of the allocation attempt.
131 Handle h_obj(THREAD, obj);
132 typeArrayOop buffer;
133 if (tenured) {
134 buffer = oopFactory::new_permanent_charArray(length, CHECK_NH);
135 } else {
136 buffer = oopFactory::new_charArray(length, CHECK_NH);
137 }
138
139 // Point the String at the char array
140 obj = h_obj();
141 set_value(obj, buffer);
142 // No need to zero the offset, allocation zero'ed the entire String object
143 assert(offset(obj) == 0, "initial String offset should be zero");
144 //set_offset(obj, 0);
145 set_count(obj, length);
146
147 return h_obj;
148 }
149
150 Handle java_lang_String::basic_create_from_unicode(jchar* unicode, int length, bool tenured, TRAPS) {
151 Handle h_obj = basic_create(length, tenured, CHECK_NH);
152 typeArrayOop buffer = value(h_obj());
153 for (int index = 0; index < length; index++) {
154 buffer->char_at_put(index, unicode[index]);
155 }
156 return h_obj;
157 }
158
159 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
160 return basic_create_from_unicode(unicode, length, false, CHECK_NH);
161 }
162
163 Handle java_lang_String::create_tenured_from_unicode(jchar* unicode, int length, TRAPS) {
164 return basic_create_from_unicode(unicode, length, true, CHECK_NH);
165 }
166
167 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
168 Handle h_obj = basic_create_from_unicode(unicode, length, false, CHECK_0);
169 return h_obj();
170 }
171
172 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
173 if (utf8_str == NULL) {
174 return Handle();
175 }
176 int length = UTF8::unicode_length(utf8_str);
177 Handle h_obj = basic_create(length, false, CHECK_NH);
178 if (length > 0) {
179 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
180 }
181 return h_obj;
182 }
183
184 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
185 Handle h_obj = create_from_str(utf8_str, CHECK_0);
186 return h_obj();
187 }
188
189 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
190 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
191 Handle h_obj = basic_create(length, false, CHECK_NH);
192 if (length > 0) {
193 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
194 }
195 return h_obj;
196 }
197
198 // Converts a C string to a Java String based on current encoding
199 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
200 assert(str != NULL, "bad arguments");
201
202 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
203 static to_java_string_fn_t _to_java_string_fn = NULL;
204
205 if (_to_java_string_fn == NULL) {
206 void *lib_handle = os::native_java_library();
207 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
208 if (_to_java_string_fn == NULL) {
209 fatal("NewStringPlatform missing");
210 }
211 }
212
213 jstring js = NULL;
214 { JavaThread* thread = (JavaThread*)THREAD;
215 assert(thread->is_Java_thread(), "must be java thread");
216 HandleMark hm(thread);
217 ThreadToNativeFromVM ttn(thread);
218 js = (_to_java_string_fn)(thread->jni_environment(), str);
219 }
220 return Handle(THREAD, JNIHandles::resolve(js));
221 }
222
223 // Converts a Java String to a native C string that can be used for
224 // native OS calls.
225 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
226
227 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
228 static to_platform_string_fn_t _to_platform_string_fn = NULL;
229
230 if (_to_platform_string_fn == NULL) {
231 void *lib_handle = os::native_java_library();
232 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
233 if (_to_platform_string_fn == NULL) {
234 fatal("GetStringPlatformChars missing");
235 }
236 }
237
238 char *native_platform_string;
239 { JavaThread* thread = (JavaThread*)THREAD;
240 assert(thread->is_Java_thread(), "must be java thread");
241 JNIEnv *env = thread->jni_environment();
242 jstring js = (jstring) JNIHandles::make_local(env, java_string());
243 bool is_copy;
244 HandleMark hm(thread);
245 ThreadToNativeFromVM ttn(thread);
246 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
247 assert(is_copy == JNI_TRUE, "is_copy value changed");
248 JNIHandles::destroy_local(js);
249 }
250 return native_platform_string;
251 }
252
253 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
254 oop obj = java_string();
255 // Typical usage is to convert all '/' to '.' in string.
256 typeArrayOop value = java_lang_String::value(obj);
257 int offset = java_lang_String::offset(obj);
258 int length = java_lang_String::length(obj);
259
260 // First check if any from_char exist
261 int index; // Declared outside, used later
262 for (index = 0; index < length; index++) {
263 if (value->char_at(index + offset) == from_char) {
264 break;
265 }
266 }
267 if (index == length) {
268 // No from_char, so do not copy.
269 return java_string;
270 }
271
272 // Create new UNICODE buffer. Must handlize value because GC
273 // may happen during String and char array creation.
274 typeArrayHandle h_value(THREAD, value);
275 Handle string = basic_create(length, false, CHECK_NH);
276
277 typeArrayOop from_buffer = h_value();
278 typeArrayOop to_buffer = java_lang_String::value(string());
279
280 // Copy contents
281 for (index = 0; index < length; index++) {
282 jchar c = from_buffer->char_at(index + offset);
283 if (c == from_char) {
284 c = to_char;
285 }
286 to_buffer->char_at_put(index, c);
287 }
288 return string;
289 }
290
291 jchar* java_lang_String::as_unicode_string(oop java_string, int& length) {
292 typeArrayOop value = java_lang_String::value(java_string);
293 int offset = java_lang_String::offset(java_string);
294 length = java_lang_String::length(java_string);
295
296 jchar* result = NEW_RESOURCE_ARRAY(jchar, length);
297 for (int index = 0; index < length; index++) {
298 result[index] = value->char_at(index + offset);
299 }
300 return result;
301 }
302
303 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {
304 oop obj = java_string();
305 typeArrayOop value = java_lang_String::value(obj);
306 int offset = java_lang_String::offset(obj);
307 int length = java_lang_String::length(obj);
308 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
309 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
310 return sym;
311 }
312
313 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
314 typeArrayOop value = java_lang_String::value(java_string);
315 int offset = java_lang_String::offset(java_string);
316 int length = java_lang_String::length(java_string);
317 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
318 return SymbolTable::probe_unicode(base, length);
319 }
320
321
322 int java_lang_String::utf8_length(oop java_string) {
323 typeArrayOop value = java_lang_String::value(java_string);
324 int offset = java_lang_String::offset(java_string);
325 int length = java_lang_String::length(java_string);
326 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
327 return UNICODE::utf8_length(position, length);
328 }
329
330 char* java_lang_String::as_utf8_string(oop java_string) {
331 typeArrayOop value = java_lang_String::value(java_string);
332 int offset = java_lang_String::offset(java_string);
333 int length = java_lang_String::length(java_string);
334 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
335 return UNICODE::as_utf8(position, length);
336 }
337
338 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
339 typeArrayOop value = java_lang_String::value(java_string);
340 int offset = java_lang_String::offset(java_string);
341 int length = java_lang_String::length(java_string);
342 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
343 return UNICODE::as_utf8(position, length, buf, buflen);
344 }
345
346 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
347 typeArrayOop value = java_lang_String::value(java_string);
348 int offset = java_lang_String::offset(java_string);
349 int length = java_lang_String::length(java_string);
350 assert(start + len <= length, "just checking");
351 jchar* position = value->char_at_addr(offset + start);
352 return UNICODE::as_utf8(position, len);
353 }
354
355 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
356 assert(SharedSkipVerify ||
357 java_string->klass() == SystemDictionary::String_klass(),
358 "must be java_string");
359 typeArrayOop value = java_lang_String::value(java_string);
360 int offset = java_lang_String::offset(java_string);
361 int length = java_lang_String::length(java_string);
362 if (length != len) {
363 return false;
364 }
365 for (int i = 0; i < len; i++) {
366 if (value->char_at(i + offset) != chars[i]) {
367 return false;
368 }
369 }
370 return true;
371 }
372
373 void java_lang_String::print(Handle java_string, outputStream* st) {
374 oop obj = java_string();
375 assert(obj->klass() == SystemDictionary::String_klass(), "must be java_string");
376 typeArrayOop value = java_lang_String::value(obj);
377 int offset = java_lang_String::offset(obj);
378 int length = java_lang_String::length(obj);
379
380 int end = MIN2(length, 100);
381 if (value == NULL) {
382 // This can happen if, e.g., printing a String
383 // object before its initializer has been called
384 st->print_cr("NULL");
385 } else {
386 st->print("\"");
387 for (int index = 0; index < length; index++) {
388 st->print("%c", value->char_at(index + offset));
389 }
390 st->print("\"");
391 }
392 }
393
394
395 oop java_lang_Class::create_mirror(KlassHandle k, TRAPS) {
396 assert(k->java_mirror() == NULL, "should only assign mirror once");
397 // Use this moment of initialization to cache modifier_flags also,
398 // to support Class.getModifiers(). Instance classes recalculate
399 // the cached flags after the class file is parsed, but before the
400 // class is put into the system dictionary.
401 int computed_modifiers = k->compute_modifier_flags(CHECK_0);
402 k->set_modifier_flags(computed_modifiers);
403 if (SystemDictionary::Class_klass_loaded()) {
404 // Allocate mirror (java.lang.Class instance)
405 Handle mirror = instanceKlass::cast(SystemDictionary::Class_klass())->allocate_permanent_instance(CHECK_0);
406 // Setup indirections
407 mirror->obj_field_put(klass_offset, k());
408 k->set_java_mirror(mirror());
409 // It might also have a component mirror. This mirror must already exist.
410 if (k->oop_is_javaArray()) {
411 Handle comp_mirror;
412 if (k->oop_is_typeArray()) {
413 BasicType type = typeArrayKlass::cast(k->as_klassOop())->element_type();
414 comp_mirror = Universe::java_mirror(type);
415 assert(comp_mirror.not_null(), "must have primitive mirror");
416 } else if (k->oop_is_objArray()) {
417 klassOop element_klass = objArrayKlass::cast(k->as_klassOop())->element_klass();
418 if (element_klass != NULL
419 && (Klass::cast(element_klass)->oop_is_instance() ||
420 Klass::cast(element_klass)->oop_is_javaArray())) {
421 comp_mirror = Klass::cast(element_klass)->java_mirror();
422 assert(comp_mirror.not_null(), "must have element mirror");
423 }
424 // else some object array internal to the VM, like systemObjArrayKlassObj
425 }
426 if (comp_mirror.not_null()) {
427 // Two-way link between the array klass and its component mirror:
428 arrayKlass::cast(k->as_klassOop())->set_component_mirror(comp_mirror());
429 set_array_klass(comp_mirror(), k->as_klassOop());
430 }
431 }
432 return mirror();
433 } else {
434 return NULL;
435 }
436 }
437
438
439 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
440 // This should be improved by adding a field at the Java level or by
441 // introducing a new VM klass (see comment in ClassFileParser)
442 oop java_class = instanceKlass::cast(SystemDictionary::Class_klass())->allocate_permanent_instance(CHECK_0);
443 if (type != T_VOID) {
444 klassOop aklass = Universe::typeArrayKlassObj(type);
445 assert(aklass != NULL, "correct bootstrap");
446 set_array_klass(java_class, aklass);
447 }
448 return java_class;
449 }
450
451
452 klassOop java_lang_Class::as_klassOop(oop java_class) {
453 //%note memory_2
454 klassOop k = klassOop(java_class->obj_field(klass_offset));
455 assert(k == NULL || k->is_klass(), "type check");
456 return k;
457 }
458
459
460 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
461 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
462 Symbol* name = NULL;
463 bool is_instance = false;
464 if (is_primitive(java_class)) {
465 name = vmSymbols::type_signature(primitive_type(java_class));
466 } else {
467 klassOop k = as_klassOop(java_class);
468 is_instance = Klass::cast(k)->oop_is_instance();
469 name = Klass::cast(k)->name();
470 }
471 if (name == NULL) {
472 st->print("<null>");
473 return;
474 }
475 if (is_instance) st->print("L");
476 st->write((char*) name->base(), (int) name->utf8_length());
477 if (is_instance) st->print(";");
478 }
479
480 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
481 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
482 Symbol* name;
483 if (is_primitive(java_class)) {
484 name = vmSymbols::type_signature(primitive_type(java_class));
485 // Because this can create a new symbol, the caller has to decrement
486 // the refcount, so make adjustment here and below for symbols returned
487 // that are not created or incremented due to a successful lookup.
488 name->increment_refcount();
489 } else {
490 klassOop k = as_klassOop(java_class);
491 if (!Klass::cast(k)->oop_is_instance()) {
492 name = Klass::cast(k)->name();
493 name->increment_refcount();
494 } else {
495 ResourceMark rm;
496 const char* sigstr = Klass::cast(k)->signature_name();
497 int siglen = (int) strlen(sigstr);
498 if (!intern_if_not_found) {
499 name = SymbolTable::probe(sigstr, siglen);
500 } else {
501 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
502 }
503 }
504 }
505 return name;
506 }
507
508
509 klassOop java_lang_Class::array_klass(oop java_class) {
510 klassOop k = klassOop(java_class->obj_field(array_klass_offset));
511 assert(k == NULL || k->is_klass() && Klass::cast(k)->oop_is_javaArray(), "should be array klass");
512 return k;
513 }
514
515
516 void java_lang_Class::set_array_klass(oop java_class, klassOop klass) {
517 assert(klass->is_klass() && Klass::cast(klass)->oop_is_javaArray(), "should be array klass");
518 java_class->obj_field_put(array_klass_offset, klass);
519 }
520
521
522 methodOop java_lang_Class::resolved_constructor(oop java_class) {
523 oop constructor = java_class->obj_field(resolved_constructor_offset);
524 assert(constructor == NULL || constructor->is_method(), "should be method");
525 return methodOop(constructor);
526 }
527
528
529 void java_lang_Class::set_resolved_constructor(oop java_class, methodOop constructor) {
530 assert(constructor->is_method(), "should be method");
531 java_class->obj_field_put(resolved_constructor_offset, constructor);
532 }
533
534
535 bool java_lang_Class::is_primitive(oop java_class) {
536 // should assert:
537 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
538 klassOop k = klassOop(java_class->obj_field(klass_offset));
539 return k == NULL;
540 }
541
542
543 BasicType java_lang_Class::primitive_type(oop java_class) {
544 assert(java_lang_Class::is_primitive(java_class), "just checking");
545 klassOop ak = klassOop(java_class->obj_field(array_klass_offset));
546 BasicType type = T_VOID;
547 if (ak != NULL) {
548 // Note: create_basic_type_mirror above initializes ak to a non-null value.
549 type = arrayKlass::cast(ak)->element_type();
550 } else {
551 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
552 }
553 assert(Universe::java_mirror(type) == java_class, "must be consistent");
554 return type;
555 }
556
557 BasicType java_lang_Class::as_BasicType(oop java_class, klassOop* reference_klass) {
558 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
559 if (is_primitive(java_class)) {
560 if (reference_klass != NULL)
561 (*reference_klass) = NULL;
562 return primitive_type(java_class);
563 } else {
564 if (reference_klass != NULL)
565 (*reference_klass) = as_klassOop(java_class);
566 return T_OBJECT;
567 }
568 }
569
570
571 oop java_lang_Class::primitive_mirror(BasicType t) {
572 oop mirror = Universe::java_mirror(t);
573 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
574 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
575 return mirror;
576 }
577
578 bool java_lang_Class::offsets_computed = false;
579 int java_lang_Class::classRedefinedCount_offset = -1;
580 int java_lang_Class::parallelCapable_offset = -1;
581
582 void java_lang_Class::compute_offsets() {
583 assert(!offsets_computed, "offsets should be initialized only once");
584 offsets_computed = true;
585
586 klassOop k = SystemDictionary::Class_klass();
587 // The classRedefinedCount field is only present starting in 1.5,
588 // so don't go fatal.
589 compute_optional_offset(classRedefinedCount_offset,
590 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
591
592 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
593 klassOop k1 = SystemDictionary::ClassLoader_klass();
594 compute_optional_offset(parallelCapable_offset,
595 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
596 }
597
598 // For class loader classes, parallelCapable defined
599 // based on non-null field
600 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
601 bool java_lang_Class::parallelCapable(oop class_loader) {
602 if (!JDK_Version::is_gte_jdk17x_version()
603 || parallelCapable_offset == -1) {
604 // Default for backward compatibility is false
605 return false;
606 }
607 return (class_loader->obj_field(parallelCapable_offset) != NULL);
608 }
609
610 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
611 if (!JDK_Version::is_gte_jdk15x_version()
612 || classRedefinedCount_offset == -1) {
613 // The classRedefinedCount field is only present starting in 1.5.
614 // If we don't have an offset for it then just return -1 as a marker.
615 return -1;
616 }
617
618 return the_class_mirror->int_field(classRedefinedCount_offset);
619 }
620
621 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
622 if (!JDK_Version::is_gte_jdk15x_version()
623 || classRedefinedCount_offset == -1) {
624 // The classRedefinedCount field is only present starting in 1.5.
625 // If we don't have an offset for it then nothing to set.
626 return;
627 }
628
629 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
630 }
631
632
633 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
634 // platform thread structure, and a eetop offset which was used for thread
635 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
636 // merged, so in the HotSpot VM we just use the eetop field for the thread
637 // instead of the privateInfo_offset.
638 //
639 // Note: The stackSize field is only present starting in 1.4.
640
641 int java_lang_Thread::_name_offset = 0;
642 int java_lang_Thread::_group_offset = 0;
643 int java_lang_Thread::_contextClassLoader_offset = 0;
644 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
645 int java_lang_Thread::_priority_offset = 0;
646 int java_lang_Thread::_eetop_offset = 0;
647 int java_lang_Thread::_daemon_offset = 0;
648 int java_lang_Thread::_stillborn_offset = 0;
649 int java_lang_Thread::_stackSize_offset = 0;
650 int java_lang_Thread::_tid_offset = 0;
651 int java_lang_Thread::_thread_status_offset = 0;
652 int java_lang_Thread::_park_blocker_offset = 0;
653 int java_lang_Thread::_park_event_offset = 0 ;
654
655
656 void java_lang_Thread::compute_offsets() {
657 assert(_group_offset == 0, "offsets should be initialized only once");
658
659 klassOop k = SystemDictionary::Thread_klass();
660 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature());
661 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
662 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
663 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
664 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
665 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
666 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
667 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
668 // The stackSize field is only present starting in 1.4, so don't go fatal.
669 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
670 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
671 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
672 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
673 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
674 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
675 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
676 vmSymbols::long_signature());
677 }
678
679
680 JavaThread* java_lang_Thread::thread(oop java_thread) {
681 return (JavaThread*)java_thread->address_field(_eetop_offset);
682 }
683
684
685 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
686 java_thread->address_field_put(_eetop_offset, (address)thread);
687 }
688
689
690 typeArrayOop java_lang_Thread::name(oop java_thread) {
691 oop name = java_thread->obj_field(_name_offset);
692 assert(name == NULL || (name->is_typeArray() && typeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking");
693 return typeArrayOop(name);
694 }
695
696
697 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) {
698 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL");
699 java_thread->obj_field_put(_name_offset, name);
700 }
701
702
703 ThreadPriority java_lang_Thread::priority(oop java_thread) {
704 return (ThreadPriority)java_thread->int_field(_priority_offset);
705 }
706
707
708 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
709 java_thread->int_field_put(_priority_offset, priority);
710 }
711
712
713 oop java_lang_Thread::threadGroup(oop java_thread) {
714 return java_thread->obj_field(_group_offset);
715 }
716
717
718 bool java_lang_Thread::is_stillborn(oop java_thread) {
719 return java_thread->bool_field(_stillborn_offset) != 0;
720 }
721
722
723 // We never have reason to turn the stillborn bit off
724 void java_lang_Thread::set_stillborn(oop java_thread) {
725 java_thread->bool_field_put(_stillborn_offset, true);
726 }
727
728
729 bool java_lang_Thread::is_alive(oop java_thread) {
730 JavaThread* thr = java_lang_Thread::thread(java_thread);
731 return (thr != NULL);
732 }
733
734
735 bool java_lang_Thread::is_daemon(oop java_thread) {
736 return java_thread->bool_field(_daemon_offset) != 0;
737 }
738
739
740 void java_lang_Thread::set_daemon(oop java_thread) {
741 java_thread->bool_field_put(_daemon_offset, true);
742 }
743
744 oop java_lang_Thread::context_class_loader(oop java_thread) {
745 return java_thread->obj_field(_contextClassLoader_offset);
746 }
747
748 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
749 return java_thread->obj_field(_inheritedAccessControlContext_offset);
750 }
751
752
753 jlong java_lang_Thread::stackSize(oop java_thread) {
754 // The stackSize field is only present starting in 1.4
755 if (_stackSize_offset > 0) {
756 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check");
757 return java_thread->long_field(_stackSize_offset);
758 } else {
759 return 0;
760 }
761 }
762
763 // Write the thread status value to threadStatus field in java.lang.Thread java class.
764 void java_lang_Thread::set_thread_status(oop java_thread,
765 java_lang_Thread::ThreadStatus status) {
766 assert(JavaThread::current()->thread_state() == _thread_in_vm, "Java Thread is not running in vm");
767 // The threadStatus is only present starting in 1.5
768 if (_thread_status_offset > 0) {
769 java_thread->int_field_put(_thread_status_offset, status);
770 }
771 }
772
773 // Read thread status value from threadStatus field in java.lang.Thread java class.
774 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
775 assert(Thread::current()->is_VM_thread() ||
776 JavaThread::current()->thread_state() == _thread_in_vm,
777 "Java Thread is not running in vm");
778 // The threadStatus is only present starting in 1.5
779 if (_thread_status_offset > 0) {
780 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
781 } else {
782 // All we can easily figure out is if it is alive, but that is
783 // enough info for a valid unknown status.
784 // These aren't restricted to valid set ThreadStatus values, so
785 // use JVMTI values and cast.
786 JavaThread* thr = java_lang_Thread::thread(java_thread);
787 if (thr == NULL) {
788 // the thread hasn't run yet or is in the process of exiting
789 return NEW;
790 }
791 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
792 }
793 }
794
795
796 jlong java_lang_Thread::thread_id(oop java_thread) {
797 // The thread ID field is only present starting in 1.5
798 if (_tid_offset > 0) {
799 return java_thread->long_field(_tid_offset);
800 } else {
801 return 0;
802 }
803 }
804
805 oop java_lang_Thread::park_blocker(oop java_thread) {
806 assert(JDK_Version::current().supports_thread_park_blocker() &&
807 _park_blocker_offset != 0, "Must support parkBlocker field");
808
809 if (_park_blocker_offset > 0) {
810 return java_thread->obj_field(_park_blocker_offset);
811 }
812
813 return NULL;
814 }
815
816 jlong java_lang_Thread::park_event(oop java_thread) {
817 if (_park_event_offset > 0) {
818 return java_thread->long_field(_park_event_offset);
819 }
820 return 0;
821 }
822
823 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
824 if (_park_event_offset > 0) {
825 java_thread->long_field_put(_park_event_offset, ptr);
826 return true;
827 }
828 return false;
829 }
830
831
832 const char* java_lang_Thread::thread_status_name(oop java_thread) {
833 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status");
834 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
835 switch (status) {
836 case NEW : return "NEW";
837 case RUNNABLE : return "RUNNABLE";
838 case SLEEPING : return "TIMED_WAITING (sleeping)";
839 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
840 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
841 case PARKED : return "WAITING (parking)";
842 case PARKED_TIMED : return "TIMED_WAITING (parking)";
843 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
844 case TERMINATED : return "TERMINATED";
845 default : return "UNKNOWN";
846 };
847 }
848 int java_lang_ThreadGroup::_parent_offset = 0;
849 int java_lang_ThreadGroup::_name_offset = 0;
850 int java_lang_ThreadGroup::_threads_offset = 0;
851 int java_lang_ThreadGroup::_groups_offset = 0;
852 int java_lang_ThreadGroup::_maxPriority_offset = 0;
853 int java_lang_ThreadGroup::_destroyed_offset = 0;
854 int java_lang_ThreadGroup::_daemon_offset = 0;
855 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
856 int java_lang_ThreadGroup::_nthreads_offset = 0;
857 int java_lang_ThreadGroup::_ngroups_offset = 0;
858
859 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
860 assert(java_thread_group->is_oop(), "thread group must be oop");
861 return java_thread_group->obj_field(_parent_offset);
862 }
863
864 // ("name as oop" accessor is not necessary)
865
866 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
867 oop name = java_thread_group->obj_field(_name_offset);
868 // ThreadGroup.name can be null
869 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
870 }
871
872 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
873 assert(java_thread_group->is_oop(), "thread group must be oop");
874 return java_thread_group->int_field(_nthreads_offset);
875 }
876
877 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
878 oop threads = java_thread_group->obj_field(_threads_offset);
879 assert(threads != NULL, "threadgroups should have threads");
880 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
881 return objArrayOop(threads);
882 }
883
884 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
885 assert(java_thread_group->is_oop(), "thread group must be oop");
886 return java_thread_group->int_field(_ngroups_offset);
887 }
888
889 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
890 oop groups = java_thread_group->obj_field(_groups_offset);
891 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
892 return objArrayOop(groups);
893 }
894
895 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
896 assert(java_thread_group->is_oop(), "thread group must be oop");
897 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
898 }
899
900 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
901 assert(java_thread_group->is_oop(), "thread group must be oop");
902 return java_thread_group->bool_field(_destroyed_offset) != 0;
903 }
904
905 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
906 assert(java_thread_group->is_oop(), "thread group must be oop");
907 return java_thread_group->bool_field(_daemon_offset) != 0;
908 }
909
910 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
911 assert(java_thread_group->is_oop(), "thread group must be oop");
912 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
913 }
914
915 void java_lang_ThreadGroup::compute_offsets() {
916 assert(_parent_offset == 0, "offsets should be initialized only once");
917
918 klassOop k = SystemDictionary::ThreadGroup_klass();
919
920 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
921 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
922 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
923 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
924 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
925 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
926 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
927 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
928 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
929 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
930 }
931
932 oop java_lang_Throwable::backtrace(oop throwable) {
933 return throwable->obj_field_acquire(backtrace_offset);
934 }
935
936
937 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
938 throwable->release_obj_field_put(backtrace_offset, value);
939 }
940
941
942 oop java_lang_Throwable::message(oop throwable) {
943 return throwable->obj_field(detailMessage_offset);
944 }
945
946
947 oop java_lang_Throwable::message(Handle throwable) {
948 return throwable->obj_field(detailMessage_offset);
949 }
950
951
952 void java_lang_Throwable::set_message(oop throwable, oop value) {
953 throwable->obj_field_put(detailMessage_offset, value);
954 }
955
956
957 void java_lang_Throwable::clear_stacktrace(oop throwable) {
958 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
959 throwable->obj_field_put(stackTrace_offset, NULL);
960 }
961
962
963 void java_lang_Throwable::print(oop throwable, outputStream* st) {
964 ResourceMark rm;
965 klassOop k = throwable->klass();
966 assert(k != NULL, "just checking");
967 st->print("%s", instanceKlass::cast(k)->external_name());
968 oop msg = message(throwable);
969 if (msg != NULL) {
970 st->print(": %s", java_lang_String::as_utf8_string(msg));
971 }
972 }
973
974
975 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
976 ResourceMark rm;
977 klassOop k = throwable->klass();
978 assert(k != NULL, "just checking");
979 st->print("%s", instanceKlass::cast(k)->external_name());
980 oop msg = message(throwable);
981 if (msg != NULL) {
982 st->print(": %s", java_lang_String::as_utf8_string(msg));
983 }
984 }
985
986 // Print stack trace element to resource allocated buffer
987 char* java_lang_Throwable::print_stack_element_to_buffer(methodOop method, int bci) {
988 // Get strings and string lengths
989 instanceKlass* klass = instanceKlass::cast(method->method_holder());
990 const char* klass_name = klass->external_name();
991 int buf_len = (int)strlen(klass_name);
992 char* source_file_name;
993 if (klass->source_file_name() == NULL) {
994 source_file_name = NULL;
995 } else {
996 source_file_name = klass->source_file_name()->as_C_string();
997 buf_len += (int)strlen(source_file_name);
998 }
999 char* method_name = method->name()->as_C_string();
1000 buf_len += (int)strlen(method_name);
1001
1002 // Allocate temporary buffer with extra space for formatting and line number
1003 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1004
1005 // Print stack trace line in buffer
1006 sprintf(buf, "\tat %s.%s", klass_name, method_name);
1007 if (method->is_native()) {
1008 strcat(buf, "(Native Method)");
1009 } else {
1010 int line_number = method->line_number_from_bci(bci);
1011 if (source_file_name != NULL && (line_number != -1)) {
1012 // Sourcename and linenumber
1013 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1014 } else if (source_file_name != NULL) {
1015 // Just sourcename
1016 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1017 } else {
1018 // Neither soucename and linenumber
1019 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1020 }
1021 nmethod* nm = method->code();
1022 if (WizardMode && nm != NULL) {
1023 sprintf(buf + (int)strlen(buf), "(nmethod " PTR_FORMAT ")", (intptr_t)nm);
1024 }
1025 }
1026
1027 return buf;
1028 }
1029
1030
1031 void java_lang_Throwable::print_stack_element(Handle stream, methodOop method, int bci) {
1032 ResourceMark rm;
1033 char* buf = print_stack_element_to_buffer(method, bci);
1034 print_to_stream(stream, buf);
1035 }
1036
1037 void java_lang_Throwable::print_stack_element(outputStream *st, methodOop method, int bci) {
1038 ResourceMark rm;
1039 char* buf = print_stack_element_to_buffer(method, bci);
1040 st->print_cr("%s", buf);
1041 }
1042
1043 void java_lang_Throwable::print_to_stream(Handle stream, const char* str) {
1044 if (stream.is_null()) {
1045 tty->print_cr("%s", str);
1046 } else {
1047 EXCEPTION_MARK;
1048 JavaValue result(T_VOID);
1049 Handle arg (THREAD, oopFactory::new_charArray(str, THREAD));
1050 if (!HAS_PENDING_EXCEPTION) {
1051 JavaCalls::call_virtual(&result,
1052 stream,
1053 KlassHandle(THREAD, stream->klass()),
1054 vmSymbols::println_name(),
1055 vmSymbols::char_array_void_signature(),
1056 arg,
1057 THREAD);
1058 }
1059 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1060 if (HAS_PENDING_EXCEPTION) CLEAR_PENDING_EXCEPTION;
1061 }
1062
1063 }
1064
1065
1066 const char* java_lang_Throwable::no_stack_trace_message() {
1067 return "\t<<no stack trace available>>";
1068 }
1069
1070
1071 // Currently used only for exceptions occurring during startup
1072 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1073 Thread *THREAD = Thread::current();
1074 Handle h_throwable(THREAD, throwable);
1075 while (h_throwable.not_null()) {
1076 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1077 if (result.is_null()) {
1078 st->print_cr(no_stack_trace_message());
1079 return;
1080 }
1081
1082 while (result.not_null()) {
1083 objArrayHandle methods (THREAD,
1084 objArrayOop(result->obj_at(trace_methods_offset)));
1085 typeArrayHandle bcis (THREAD,
1086 typeArrayOop(result->obj_at(trace_bcis_offset)));
1087
1088 if (methods.is_null() || bcis.is_null()) {
1089 st->print_cr(no_stack_trace_message());
1090 return;
1091 }
1092
1093 int length = methods()->length();
1094 for (int index = 0; index < length; index++) {
1095 methodOop method = methodOop(methods()->obj_at(index));
1096 if (method == NULL) goto handle_cause;
1097 int bci = bcis->ushort_at(index);
1098 print_stack_element(st, method, bci);
1099 }
1100 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1101 }
1102 handle_cause:
1103 {
1104 EXCEPTION_MARK;
1105 JavaValue result(T_OBJECT);
1106 JavaCalls::call_virtual(&result,
1107 h_throwable,
1108 KlassHandle(THREAD, h_throwable->klass()),
1109 vmSymbols::getCause_name(),
1110 vmSymbols::void_throwable_signature(),
1111 THREAD);
1112 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1113 if (HAS_PENDING_EXCEPTION) {
1114 CLEAR_PENDING_EXCEPTION;
1115 h_throwable = Handle();
1116 } else {
1117 h_throwable = Handle(THREAD, (oop) result.get_jobject());
1118 if (h_throwable.not_null()) {
1119 st->print("Caused by: ");
1120 print(h_throwable, st);
1121 st->cr();
1122 }
1123 }
1124 }
1125 }
1126 }
1127
1128
1129 void java_lang_Throwable::print_stack_trace(oop throwable, oop print_stream) {
1130 // Note: this is no longer used in Merlin, but we support it for compatibility.
1131 Thread *thread = Thread::current();
1132 Handle stream(thread, print_stream);
1133 objArrayHandle result (thread, objArrayOop(backtrace(throwable)));
1134 if (result.is_null()) {
1135 print_to_stream(stream, no_stack_trace_message());
1136 return;
1137 }
1138
1139 while (result.not_null()) {
1140 objArrayHandle methods (thread,
1141 objArrayOop(result->obj_at(trace_methods_offset)));
1142 typeArrayHandle bcis (thread,
1143 typeArrayOop(result->obj_at(trace_bcis_offset)));
1144
1145 if (methods.is_null() || bcis.is_null()) {
1146 print_to_stream(stream, no_stack_trace_message());
1147 return;
1148 }
1149
1150 int length = methods()->length();
1151 for (int index = 0; index < length; index++) {
1152 methodOop method = methodOop(methods()->obj_at(index));
1153 if (method == NULL) return;
1154 int bci = bcis->ushort_at(index);
1155 print_stack_element(stream, method, bci);
1156 }
1157 result = objArrayHandle(thread, objArrayOop(result->obj_at(trace_next_offset)));
1158 }
1159 }
1160
1161 // This class provides a simple wrapper over the internal structure of
1162 // exception backtrace to insulate users of the backtrace from needing
1163 // to know what it looks like.
1164 class BacktraceBuilder: public StackObj {
1165 private:
1166 Handle _backtrace;
1167 objArrayOop _head;
1168 objArrayOop _methods;
1169 typeArrayOop _bcis;
1170 int _index;
1171 bool _dirty;
1172 No_Safepoint_Verifier _nsv;
1173
1174 public:
1175
1176 enum {
1177 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1178 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1179 trace_next_offset = java_lang_Throwable::trace_next_offset,
1180 trace_size = java_lang_Throwable::trace_size,
1181 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1182 };
1183
1184 // constructor for new backtrace
1185 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _dirty(false) {
1186 expand(CHECK);
1187 _backtrace = _head;
1188 _index = 0;
1189 }
1190
1191 void flush() {
1192 // The following appears to have been an optimization to save from
1193 // doing a barrier for each individual store into the _methods array,
1194 // but rather to do it for the entire array after the series of writes.
1195 // That optimization seems to have been lost when compressed oops was
1196 // implemented. However, the extra card-marks below was left in place,
1197 // but is now redundant because the individual stores into the
1198 // _methods array already execute the barrier code. CR 6918185 has
1199 // been filed so the original code may be restored by deferring the
1200 // barriers until after the entire sequence of stores, thus re-enabling
1201 // the intent of the original optimization. In the meantime the redundant
1202 // card mark below is now disabled.
1203 if (_dirty && _methods != NULL) {
1204 #if 0
1205 BarrierSet* bs = Universe::heap()->barrier_set();
1206 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt");
1207 bs->write_ref_array((HeapWord*)_methods->base(), _methods->length());
1208 #endif
1209 _dirty = false;
1210 }
1211 }
1212
1213 void expand(TRAPS) {
1214 flush();
1215
1216 objArrayHandle old_head(THREAD, _head);
1217 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1218
1219 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1220 objArrayHandle new_head(THREAD, head);
1221
1222 objArrayOop methods = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1223 objArrayHandle new_methods(THREAD, methods);
1224
1225 typeArrayOop bcis = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1226 typeArrayHandle new_bcis(THREAD, bcis);
1227
1228 if (!old_head.is_null()) {
1229 old_head->obj_at_put(trace_next_offset, new_head());
1230 }
1231 new_head->obj_at_put(trace_methods_offset, new_methods());
1232 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1233
1234 _head = new_head();
1235 _methods = new_methods();
1236 _bcis = new_bcis();
1237 _index = 0;
1238 }
1239
1240 oop backtrace() {
1241 flush();
1242 return _backtrace();
1243 }
1244
1245 inline void push(methodOop method, short bci, TRAPS) {
1246 if (_index >= trace_chunk_size) {
1247 methodHandle mhandle(THREAD, method);
1248 expand(CHECK);
1249 method = mhandle();
1250 }
1251
1252 _methods->obj_at_put(_index, method);
1253 _bcis->ushort_at_put(_index, bci);
1254 _index++;
1255 _dirty = true;
1256 }
1257
1258 methodOop current_method() {
1259 assert(_index >= 0 && _index < trace_chunk_size, "out of range");
1260 return methodOop(_methods->obj_at(_index));
1261 }
1262
1263 jushort current_bci() {
1264 assert(_index >= 0 && _index < trace_chunk_size, "out of range");
1265 return _bcis->ushort_at(_index);
1266 }
1267 };
1268
1269
1270 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, TRAPS) {
1271 if (!StackTraceInThrowable) return;
1272 ResourceMark rm(THREAD);
1273
1274 // Start out by clearing the backtrace for this object, in case the VM
1275 // runs out of memory while allocating the stack trace
1276 set_backtrace(throwable(), NULL);
1277 if (JDK_Version::is_gte_jdk14x_version()) {
1278 // New since 1.4, clear lazily constructed Java level stacktrace if
1279 // refilling occurs
1280 clear_stacktrace(throwable());
1281 }
1282
1283 int max_depth = MaxJavaStackTraceDepth;
1284 JavaThread* thread = (JavaThread*)THREAD;
1285 BacktraceBuilder bt(CHECK);
1286
1287 // Instead of using vframe directly, this version of fill_in_stack_trace
1288 // basically handles everything by hand. This significantly improved the
1289 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1290 // See bug 6333838 for more details.
1291 // The "ASSERT" here is to verify this method generates the exactly same stack
1292 // trace as utilizing vframe.
1293 #ifdef ASSERT
1294 vframeStream st(thread);
1295 methodHandle st_method(THREAD, st.method());
1296 #endif
1297 int total_count = 0;
1298 RegisterMap map(thread, false);
1299 int decode_offset = 0;
1300 nmethod* nm = NULL;
1301 bool skip_fillInStackTrace_check = false;
1302 bool skip_throwableInit_check = false;
1303
1304 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1305 methodOop method = NULL;
1306 int bci = 0;
1307
1308 // Compiled java method case.
1309 if (decode_offset != 0) {
1310 DebugInfoReadStream stream(nm, decode_offset);
1311 decode_offset = stream.read_int();
1312 method = (methodOop)nm->oop_at(stream.read_int());
1313 bci = stream.read_bci();
1314 } else {
1315 if (fr.is_first_frame()) break;
1316 address pc = fr.pc();
1317 if (fr.is_interpreted_frame()) {
1318 intptr_t bcx = fr.interpreter_frame_bcx();
1319 method = fr.interpreter_frame_method();
1320 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
1321 fr = fr.sender(&map);
1322 } else {
1323 CodeBlob* cb = fr.cb();
1324 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1325 // but non nmethod
1326 fr = fr.sender(&map);
1327 if (cb == NULL || !cb->is_nmethod()) {
1328 continue;
1329 }
1330 nm = (nmethod*)cb;
1331 if (nm->method()->is_native()) {
1332 method = nm->method();
1333 bci = 0;
1334 } else {
1335 PcDesc* pd = nm->pc_desc_at(pc);
1336 decode_offset = pd->scope_decode_offset();
1337 // if decode_offset is not equal to 0, it will execute the
1338 // "compiled java method case" at the beginning of the loop.
1339 continue;
1340 }
1341 }
1342 }
1343 #ifdef ASSERT
1344 assert(st_method() == method && st.bci() == bci,
1345 "Wrong stack trace");
1346 st.next();
1347 // vframeStream::method isn't GC-safe so store off a copy
1348 // of the methodOop in case we GC.
1349 if (!st.at_end()) {
1350 st_method = st.method();
1351 }
1352 #endif
1353 if (!skip_fillInStackTrace_check) {
1354 // check "fillInStackTrace" only once, so we negate the flag
1355 // after the first time check.
1356 skip_fillInStackTrace_check = true;
1357 if (method->name() == vmSymbols::fillInStackTrace_name()) {
1358 continue;
1359 }
1360 }
1361 // skip <init> methods of the exceptions klass. If there is <init> methods
1362 // that belongs to a superclass of the exception we are going to skipping
1363 // them in stack trace. This is simlar to classic VM.
1364 if (!skip_throwableInit_check) {
1365 if (method->name() == vmSymbols::object_initializer_name() &&
1366 throwable->is_a(method->method_holder())) {
1367 continue;
1368 } else {
1369 // if no "Throwable.init()" method found, we stop checking it next time.
1370 skip_throwableInit_check = true;
1371 }
1372 }
1373 bt.push(method, bci, CHECK);
1374 total_count++;
1375 }
1376
1377 // Put completed stack trace into throwable object
1378 set_backtrace(throwable(), bt.backtrace());
1379 }
1380
1381 void java_lang_Throwable::fill_in_stack_trace(Handle throwable) {
1382 // No-op if stack trace is disabled
1383 if (!StackTraceInThrowable) {
1384 return;
1385 }
1386
1387 // Disable stack traces for some preallocated out of memory errors
1388 if (!Universe::should_fill_in_stack_trace(throwable)) {
1389 return;
1390 }
1391
1392 PRESERVE_EXCEPTION_MARK;
1393
1394 JavaThread* thread = JavaThread::active();
1395 fill_in_stack_trace(throwable, thread);
1396 // ignore exceptions thrown during stack trace filling
1397 CLEAR_PENDING_EXCEPTION;
1398 }
1399
1400 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1401 // Allocate stack trace - backtrace is created but not filled in
1402
1403 // No-op if stack trace is disabled
1404 if (!StackTraceInThrowable) return;
1405
1406 objArrayOop h_oop = oopFactory::new_objectArray(trace_size, CHECK);
1407 objArrayHandle backtrace (THREAD, h_oop);
1408 objArrayOop m_oop = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1409 objArrayHandle methods (THREAD, m_oop);
1410 typeArrayOop b = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1411 typeArrayHandle bcis(THREAD, b);
1412
1413 // backtrace has space for one chunk (next is NULL)
1414 backtrace->obj_at_put(trace_methods_offset, methods());
1415 backtrace->obj_at_put(trace_bcis_offset, bcis());
1416 set_backtrace(throwable(), backtrace());
1417 }
1418
1419
1420 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1421 // Fill in stack trace into preallocated backtrace (no GC)
1422
1423 // No-op if stack trace is disabled
1424 if (!StackTraceInThrowable) return;
1425
1426 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1427
1428 oop backtrace = java_lang_Throwable::backtrace(throwable());
1429 assert(backtrace != NULL, "backtrace not preallocated");
1430
1431 oop m = objArrayOop(backtrace)->obj_at(trace_methods_offset);
1432 objArrayOop methods = objArrayOop(m);
1433 assert(methods != NULL && methods->length() > 0, "method array not preallocated");
1434
1435 oop b = objArrayOop(backtrace)->obj_at(trace_bcis_offset);
1436 typeArrayOop bcis = typeArrayOop(b);
1437 assert(bcis != NULL, "bci array not preallocated");
1438
1439 assert(methods->length() == bcis->length(), "method and bci arrays should match");
1440
1441 JavaThread* thread = JavaThread::current();
1442 ResourceMark rm(thread);
1443 vframeStream st(thread);
1444
1445 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1446 // methods as preallocated errors aren't created by "java" code.
1447
1448 // fill in as much stack trace as possible
1449 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1450 int chunk_count = 0;
1451
1452 for (;!st.at_end(); st.next()) {
1453 // add element
1454 bcis->ushort_at_put(chunk_count, st.bci());
1455 methods->obj_at_put(chunk_count, st.method());
1456
1457 chunk_count++;
1458
1459 // Bail-out for deep stacks
1460 if (chunk_count >= max_chunks) break;
1461 }
1462 }
1463
1464
1465 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1466 if (throwable == NULL) {
1467 THROW_0(vmSymbols::java_lang_NullPointerException());
1468 }
1469 objArrayOop chunk = objArrayOop(backtrace(throwable));
1470 int depth = 0;
1471 if (chunk != NULL) {
1472 // Iterate over chunks and count full ones
1473 while (true) {
1474 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1475 if (next == NULL) break;
1476 depth += trace_chunk_size;
1477 chunk = next;
1478 }
1479 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1480 // Count element in remaining partial chunk
1481 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
1482 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1483 assert(methods != NULL && bcis != NULL, "sanity check");
1484 for (int i = 0; i < methods->length(); i++) {
1485 if (methods->obj_at(i) == NULL) break;
1486 depth++;
1487 }
1488 }
1489 return depth;
1490 }
1491
1492
1493 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1494 if (throwable == NULL) {
1495 THROW_0(vmSymbols::java_lang_NullPointerException());
1496 }
1497 if (index < 0) {
1498 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1499 }
1500 // Compute how many chunks to skip and index into actual chunk
1501 objArrayOop chunk = objArrayOop(backtrace(throwable));
1502 int skip_chunks = index / trace_chunk_size;
1503 int chunk_index = index % trace_chunk_size;
1504 while (chunk != NULL && skip_chunks > 0) {
1505 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1506 skip_chunks--;
1507 }
1508 if (chunk == NULL) {
1509 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1510 }
1511 // Get method,bci from chunk
1512 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
1513 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1514 assert(methods != NULL && bcis != NULL, "sanity check");
1515 methodHandle method(THREAD, methodOop(methods->obj_at(chunk_index)));
1516 int bci = bcis->ushort_at(chunk_index);
1517 // Chunk can be partial full
1518 if (method.is_null()) {
1519 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1520 }
1521
1522 oop element = java_lang_StackTraceElement::create(method, bci, CHECK_0);
1523 return element;
1524 }
1525
1526 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1527 // SystemDictionary::stackTraceElement_klass() will be null for pre-1.4 JDKs
1528 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1529
1530 // Allocate java.lang.StackTraceElement instance
1531 klassOop k = SystemDictionary::StackTraceElement_klass();
1532 assert(k != NULL, "must be loaded in 1.4+");
1533 instanceKlassHandle ik (THREAD, k);
1534 if (ik->should_be_initialized()) {
1535 ik->initialize(CHECK_0);
1536 }
1537
1538 Handle element = ik->allocate_instance_handle(CHECK_0);
1539 // Fill in class name
1540 ResourceMark rm(THREAD);
1541 const char* str = instanceKlass::cast(method->method_holder())->external_name();
1542 oop classname = StringTable::intern((char*) str, CHECK_0);
1543 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1544 // Fill in method name
1545 oop methodname = StringTable::intern(method->name(), CHECK_0);
1546 java_lang_StackTraceElement::set_methodName(element(), methodname);
1547 // Fill in source file name
1548 Symbol* source = instanceKlass::cast(method->method_holder())->source_file_name();
1549 oop filename = StringTable::intern(source, CHECK_0);
1550 java_lang_StackTraceElement::set_fileName(element(), filename);
1551 // File in source line number
1552 int line_number;
1553 if (method->is_native()) {
1554 // Negative value different from -1 below, enabling Java code in
1555 // class java.lang.StackTraceElement to distinguish "native" from
1556 // "no LineNumberTable".
1557 line_number = -2;
1558 } else {
1559 // Returns -1 if no LineNumberTable, and otherwise actual line number
1560 line_number = method->line_number_from_bci(bci);
1561 }
1562 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1563
1564 return element();
1565 }
1566
1567
1568 void java_lang_reflect_AccessibleObject::compute_offsets() {
1569 klassOop k = SystemDictionary::reflect_AccessibleObject_klass();
1570 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1571 }
1572
1573 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1574 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1575 return (jboolean) reflect->bool_field(override_offset);
1576 }
1577
1578 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1579 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1580 reflect->bool_field_put(override_offset, (int) value);
1581 }
1582
1583 void java_lang_reflect_Method::compute_offsets() {
1584 klassOop k = SystemDictionary::reflect_Method_klass();
1585 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1586 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1587 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1588 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1589 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1590 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1591 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1592 // The generic signature and annotations fields are only present in 1.5
1593 signature_offset = -1;
1594 annotations_offset = -1;
1595 parameter_annotations_offset = -1;
1596 annotation_default_offset = -1;
1597 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1598 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1599 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1600 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1601 }
1602
1603 Handle java_lang_reflect_Method::create(TRAPS) {
1604 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1605 klassOop klass = SystemDictionary::reflect_Method_klass();
1606 // This class is eagerly initialized during VM initialization, since we keep a refence
1607 // to one of the methods
1608 assert(instanceKlass::cast(klass)->is_initialized(), "must be initialized");
1609 return instanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH);
1610 }
1611
1612 oop java_lang_reflect_Method::clazz(oop reflect) {
1613 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1614 return reflect->obj_field(clazz_offset);
1615 }
1616
1617 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1618 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1619 reflect->obj_field_put(clazz_offset, value);
1620 }
1621
1622 int java_lang_reflect_Method::slot(oop reflect) {
1623 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1624 return reflect->int_field(slot_offset);
1625 }
1626
1627 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1628 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1629 reflect->int_field_put(slot_offset, value);
1630 }
1631
1632 oop java_lang_reflect_Method::name(oop method) {
1633 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1634 return method->obj_field(name_offset);
1635 }
1636
1637 void java_lang_reflect_Method::set_name(oop method, oop value) {
1638 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1639 method->obj_field_put(name_offset, value);
1640 }
1641
1642 oop java_lang_reflect_Method::return_type(oop method) {
1643 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1644 return method->obj_field(returnType_offset);
1645 }
1646
1647 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
1648 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1649 method->obj_field_put(returnType_offset, value);
1650 }
1651
1652 oop java_lang_reflect_Method::parameter_types(oop method) {
1653 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1654 return method->obj_field(parameterTypes_offset);
1655 }
1656
1657 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
1658 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1659 method->obj_field_put(parameterTypes_offset, value);
1660 }
1661
1662 oop java_lang_reflect_Method::exception_types(oop method) {
1663 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1664 return method->obj_field(exceptionTypes_offset);
1665 }
1666
1667 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
1668 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1669 method->obj_field_put(exceptionTypes_offset, value);
1670 }
1671
1672 int java_lang_reflect_Method::modifiers(oop method) {
1673 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1674 return method->int_field(modifiers_offset);
1675 }
1676
1677 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
1678 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1679 method->int_field_put(modifiers_offset, value);
1680 }
1681
1682 bool java_lang_reflect_Method::has_signature_field() {
1683 return (signature_offset >= 0);
1684 }
1685
1686 oop java_lang_reflect_Method::signature(oop method) {
1687 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1688 assert(has_signature_field(), "signature field must be present");
1689 return method->obj_field(signature_offset);
1690 }
1691
1692 void java_lang_reflect_Method::set_signature(oop method, oop value) {
1693 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1694 assert(has_signature_field(), "signature field must be present");
1695 method->obj_field_put(signature_offset, value);
1696 }
1697
1698 bool java_lang_reflect_Method::has_annotations_field() {
1699 return (annotations_offset >= 0);
1700 }
1701
1702 oop java_lang_reflect_Method::annotations(oop method) {
1703 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1704 assert(has_annotations_field(), "annotations field must be present");
1705 return method->obj_field(annotations_offset);
1706 }
1707
1708 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
1709 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1710 assert(has_annotations_field(), "annotations field must be present");
1711 method->obj_field_put(annotations_offset, value);
1712 }
1713
1714 bool java_lang_reflect_Method::has_parameter_annotations_field() {
1715 return (parameter_annotations_offset >= 0);
1716 }
1717
1718 oop java_lang_reflect_Method::parameter_annotations(oop method) {
1719 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1720 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1721 return method->obj_field(parameter_annotations_offset);
1722 }
1723
1724 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
1725 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1726 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1727 method->obj_field_put(parameter_annotations_offset, value);
1728 }
1729
1730 bool java_lang_reflect_Method::has_annotation_default_field() {
1731 return (annotation_default_offset >= 0);
1732 }
1733
1734 oop java_lang_reflect_Method::annotation_default(oop method) {
1735 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1736 assert(has_annotation_default_field(), "annotation default field must be present");
1737 return method->obj_field(annotation_default_offset);
1738 }
1739
1740 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
1741 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1742 assert(has_annotation_default_field(), "annotation default field must be present");
1743 method->obj_field_put(annotation_default_offset, value);
1744 }
1745
1746 void java_lang_reflect_Constructor::compute_offsets() {
1747 klassOop k = SystemDictionary::reflect_Constructor_klass();
1748 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1749 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1750 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1751 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1752 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1753 // The generic signature and annotations fields are only present in 1.5
1754 signature_offset = -1;
1755 annotations_offset = -1;
1756 parameter_annotations_offset = -1;
1757 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1758 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1759 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1760 }
1761
1762 Handle java_lang_reflect_Constructor::create(TRAPS) {
1763 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1764 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
1765 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
1766 instanceKlassHandle klass (THREAD, k);
1767 // Ensure it is initialized
1768 klass->initialize(CHECK_NH);
1769 return klass->allocate_instance_handle(CHECK_NH);
1770 }
1771
1772 oop java_lang_reflect_Constructor::clazz(oop reflect) {
1773 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1774 return reflect->obj_field(clazz_offset);
1775 }
1776
1777 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
1778 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1779 reflect->obj_field_put(clazz_offset, value);
1780 }
1781
1782 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
1783 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1784 return constructor->obj_field(parameterTypes_offset);
1785 }
1786
1787 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
1788 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1789 constructor->obj_field_put(parameterTypes_offset, value);
1790 }
1791
1792 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
1793 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1794 return constructor->obj_field(exceptionTypes_offset);
1795 }
1796
1797 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
1798 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1799 constructor->obj_field_put(exceptionTypes_offset, value);
1800 }
1801
1802 int java_lang_reflect_Constructor::slot(oop reflect) {
1803 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1804 return reflect->int_field(slot_offset);
1805 }
1806
1807 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
1808 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1809 reflect->int_field_put(slot_offset, value);
1810 }
1811
1812 int java_lang_reflect_Constructor::modifiers(oop constructor) {
1813 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1814 return constructor->int_field(modifiers_offset);
1815 }
1816
1817 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
1818 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1819 constructor->int_field_put(modifiers_offset, value);
1820 }
1821
1822 bool java_lang_reflect_Constructor::has_signature_field() {
1823 return (signature_offset >= 0);
1824 }
1825
1826 oop java_lang_reflect_Constructor::signature(oop constructor) {
1827 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1828 assert(has_signature_field(), "signature field must be present");
1829 return constructor->obj_field(signature_offset);
1830 }
1831
1832 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
1833 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1834 assert(has_signature_field(), "signature field must be present");
1835 constructor->obj_field_put(signature_offset, value);
1836 }
1837
1838 bool java_lang_reflect_Constructor::has_annotations_field() {
1839 return (annotations_offset >= 0);
1840 }
1841
1842 oop java_lang_reflect_Constructor::annotations(oop constructor) {
1843 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1844 assert(has_annotations_field(), "annotations field must be present");
1845 return constructor->obj_field(annotations_offset);
1846 }
1847
1848 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
1849 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1850 assert(has_annotations_field(), "annotations field must be present");
1851 constructor->obj_field_put(annotations_offset, value);
1852 }
1853
1854 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
1855 return (parameter_annotations_offset >= 0);
1856 }
1857
1858 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
1859 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1860 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1861 return method->obj_field(parameter_annotations_offset);
1862 }
1863
1864 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
1865 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1866 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1867 method->obj_field_put(parameter_annotations_offset, value);
1868 }
1869
1870 void java_lang_reflect_Field::compute_offsets() {
1871 klassOop k = SystemDictionary::reflect_Field_klass();
1872 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1873 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1874 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
1875 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1876 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1877 // The generic signature and annotations fields are only present in 1.5
1878 signature_offset = -1;
1879 annotations_offset = -1;
1880 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1881 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1882 }
1883
1884 Handle java_lang_reflect_Field::create(TRAPS) {
1885 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1886 Symbol* name = vmSymbols::java_lang_reflect_Field();
1887 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
1888 instanceKlassHandle klass (THREAD, k);
1889 // Ensure it is initialized
1890 klass->initialize(CHECK_NH);
1891 return klass->allocate_instance_handle(CHECK_NH);
1892 }
1893
1894 oop java_lang_reflect_Field::clazz(oop reflect) {
1895 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1896 return reflect->obj_field(clazz_offset);
1897 }
1898
1899 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
1900 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1901 reflect->obj_field_put(clazz_offset, value);
1902 }
1903
1904 oop java_lang_reflect_Field::name(oop field) {
1905 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1906 return field->obj_field(name_offset);
1907 }
1908
1909 void java_lang_reflect_Field::set_name(oop field, oop value) {
1910 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1911 field->obj_field_put(name_offset, value);
1912 }
1913
1914 oop java_lang_reflect_Field::type(oop field) {
1915 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1916 return field->obj_field(type_offset);
1917 }
1918
1919 void java_lang_reflect_Field::set_type(oop field, oop value) {
1920 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1921 field->obj_field_put(type_offset, value);
1922 }
1923
1924 int java_lang_reflect_Field::slot(oop reflect) {
1925 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1926 return reflect->int_field(slot_offset);
1927 }
1928
1929 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
1930 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1931 reflect->int_field_put(slot_offset, value);
1932 }
1933
1934 int java_lang_reflect_Field::modifiers(oop field) {
1935 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1936 return field->int_field(modifiers_offset);
1937 }
1938
1939 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
1940 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1941 field->int_field_put(modifiers_offset, value);
1942 }
1943
1944 bool java_lang_reflect_Field::has_signature_field() {
1945 return (signature_offset >= 0);
1946 }
1947
1948 oop java_lang_reflect_Field::signature(oop field) {
1949 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1950 assert(has_signature_field(), "signature field must be present");
1951 return field->obj_field(signature_offset);
1952 }
1953
1954 void java_lang_reflect_Field::set_signature(oop field, oop value) {
1955 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1956 assert(has_signature_field(), "signature field must be present");
1957 field->obj_field_put(signature_offset, value);
1958 }
1959
1960 bool java_lang_reflect_Field::has_annotations_field() {
1961 return (annotations_offset >= 0);
1962 }
1963
1964 oop java_lang_reflect_Field::annotations(oop field) {
1965 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1966 assert(has_annotations_field(), "annotations field must be present");
1967 return field->obj_field(annotations_offset);
1968 }
1969
1970 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
1971 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1972 assert(has_annotations_field(), "annotations field must be present");
1973 field->obj_field_put(annotations_offset, value);
1974 }
1975
1976
1977 void sun_reflect_ConstantPool::compute_offsets() {
1978 klassOop k = SystemDictionary::reflect_ConstantPool_klass();
1979 // This null test can be removed post beta
1980 if (k != NULL) {
1981 compute_offset(_cp_oop_offset, k, vmSymbols::constantPoolOop_name(), vmSymbols::object_signature());
1982 }
1983 }
1984
1985
1986 Handle sun_reflect_ConstantPool::create(TRAPS) {
1987 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1988 klassOop k = SystemDictionary::reflect_ConstantPool_klass();
1989 instanceKlassHandle klass (THREAD, k);
1990 // Ensure it is initialized
1991 klass->initialize(CHECK_NH);
1992 return klass->allocate_instance_handle(CHECK_NH);
1993 }
1994
1995
1996 oop sun_reflect_ConstantPool::cp_oop(oop reflect) {
1997 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1998 return reflect->obj_field(_cp_oop_offset);
1999 }
2000
2001
2002 void sun_reflect_ConstantPool::set_cp_oop(oop reflect, oop value) {
2003 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2004 reflect->obj_field_put(_cp_oop_offset, value);
2005 }
2006
2007 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2008 klassOop k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2009 // This null test can be removed post beta
2010 if (k != NULL) {
2011 compute_offset(_base_offset, k,
2012 vmSymbols::base_name(), vmSymbols::object_signature());
2013 }
2014 }
2015
2016 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2017 klassOop k = SystemDictionary::box_klass(type);
2018 if (k == NULL) return NULL;
2019 instanceKlassHandle h (THREAD, k);
2020 if (!h->is_initialized()) h->initialize(CHECK_0);
2021 return h->allocate_instance(THREAD);
2022 }
2023
2024
2025 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2026 oop box = initialize_and_allocate(type, CHECK_0);
2027 if (box == NULL) return NULL;
2028 switch (type) {
2029 case T_BOOLEAN:
2030 box->bool_field_put(value_offset, value->z);
2031 break;
2032 case T_CHAR:
2033 box->char_field_put(value_offset, value->c);
2034 break;
2035 case T_FLOAT:
2036 box->float_field_put(value_offset, value->f);
2037 break;
2038 case T_DOUBLE:
2039 box->double_field_put(long_value_offset, value->d);
2040 break;
2041 case T_BYTE:
2042 box->byte_field_put(value_offset, value->b);
2043 break;
2044 case T_SHORT:
2045 box->short_field_put(value_offset, value->s);
2046 break;
2047 case T_INT:
2048 box->int_field_put(value_offset, value->i);
2049 break;
2050 case T_LONG:
2051 box->long_field_put(long_value_offset, value->j);
2052 break;
2053 default:
2054 return NULL;
2055 }
2056 return box;
2057 }
2058
2059
2060 BasicType java_lang_boxing_object::basic_type(oop box) {
2061 if (box == NULL) return T_ILLEGAL;
2062 BasicType type = SystemDictionary::box_klass_type(box->klass());
2063 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2064 return T_ILLEGAL;
2065 return type;
2066 }
2067
2068
2069 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2070 BasicType type = SystemDictionary::box_klass_type(box->klass());
2071 switch (type) {
2072 case T_BOOLEAN:
2073 value->z = box->bool_field(value_offset);
2074 break;
2075 case T_CHAR:
2076 value->c = box->char_field(value_offset);
2077 break;
2078 case T_FLOAT:
2079 value->f = box->float_field(value_offset);
2080 break;
2081 case T_DOUBLE:
2082 value->d = box->double_field(long_value_offset);
2083 break;
2084 case T_BYTE:
2085 value->b = box->byte_field(value_offset);
2086 break;
2087 case T_SHORT:
2088 value->s = box->short_field(value_offset);
2089 break;
2090 case T_INT:
2091 value->i = box->int_field(value_offset);
2092 break;
2093 case T_LONG:
2094 value->j = box->long_field(long_value_offset);
2095 break;
2096 default:
2097 return T_ILLEGAL;
2098 } // end switch
2099 return type;
2100 }
2101
2102
2103 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2104 BasicType type = SystemDictionary::box_klass_type(box->klass());
2105 switch (type) {
2106 case T_BOOLEAN:
2107 box->bool_field_put(value_offset, value->z);
2108 break;
2109 case T_CHAR:
2110 box->char_field_put(value_offset, value->c);
2111 break;
2112 case T_FLOAT:
2113 box->float_field_put(value_offset, value->f);
2114 break;
2115 case T_DOUBLE:
2116 box->double_field_put(long_value_offset, value->d);
2117 break;
2118 case T_BYTE:
2119 box->byte_field_put(value_offset, value->b);
2120 break;
2121 case T_SHORT:
2122 box->short_field_put(value_offset, value->s);
2123 break;
2124 case T_INT:
2125 box->int_field_put(value_offset, value->i);
2126 break;
2127 case T_LONG:
2128 box->long_field_put(long_value_offset, value->j);
2129 break;
2130 default:
2131 return T_ILLEGAL;
2132 } // end switch
2133 return type;
2134 }
2135
2136
2137 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2138 switch (type) {
2139 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2140 case T_CHAR: st->print("%d", value->c); break;
2141 case T_BYTE: st->print("%d", value->b); break;
2142 case T_SHORT: st->print("%d", value->s); break;
2143 case T_INT: st->print("%d", value->i); break;
2144 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2145 case T_FLOAT: st->print("%f", value->f); break;
2146 case T_DOUBLE: st->print("%lf", value->d); break;
2147 default: st->print("type %d?", type); break;
2148 }
2149 }
2150
2151
2152 // Support for java_lang_ref_Reference
2153 oop java_lang_ref_Reference::pending_list_lock() {
2154 instanceKlass* ik = instanceKlass::cast(SystemDictionary::Reference_klass());
2155 char *addr = (((char *)ik->start_of_static_fields()) + static_lock_offset);
2156 if (UseCompressedOops) {
2157 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2158 } else {
2159 return oopDesc::load_decode_heap_oop((oop*)addr);
2160 }
2161 }
2162
2163 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2164 instanceKlass* ik = instanceKlass::cast(SystemDictionary::Reference_klass());
2165 char *addr = (((char *)ik->start_of_static_fields()) + static_pending_offset);
2166 // XXX This might not be HeapWord aligned, almost rather be char *.
2167 return (HeapWord*)addr;
2168 }
2169
2170 oop java_lang_ref_Reference::pending_list() {
2171 char *addr = (char *)pending_list_addr();
2172 if (UseCompressedOops) {
2173 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2174 } else {
2175 return oopDesc::load_decode_heap_oop((oop*)addr);
2176 }
2177 }
2178
2179
2180 // Support for java_lang_ref_SoftReference
2181
2182 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2183 return ref->long_field(timestamp_offset);
2184 }
2185
2186 jlong java_lang_ref_SoftReference::clock() {
2187 instanceKlass* ik = instanceKlass::cast(SystemDictionary::SoftReference_klass());
2188 int offset = ik->offset_of_static_fields() + static_clock_offset;
2189
2190 return SystemDictionary::SoftReference_klass()->long_field(offset);
2191 }
2192
2193 void java_lang_ref_SoftReference::set_clock(jlong value) {
2194 instanceKlass* ik = instanceKlass::cast(SystemDictionary::SoftReference_klass());
2195 int offset = ik->offset_of_static_fields() + static_clock_offset;
2196
2197 SystemDictionary::SoftReference_klass()->long_field_put(offset, value);
2198 }
2199
2200
2201 // Support for java_dyn_MethodHandle
2202
2203 int java_dyn_MethodHandle::_type_offset;
2204 int java_dyn_MethodHandle::_vmtarget_offset;
2205 int java_dyn_MethodHandle::_vmentry_offset;
2206 int java_dyn_MethodHandle::_vmslots_offset;
2207
2208 int sun_dyn_MemberName::_clazz_offset;
2209 int sun_dyn_MemberName::_name_offset;
2210 int sun_dyn_MemberName::_type_offset;
2211 int sun_dyn_MemberName::_flags_offset;
2212 int sun_dyn_MemberName::_vmtarget_offset;
2213 int sun_dyn_MemberName::_vmindex_offset;
2214
2215 int sun_dyn_DirectMethodHandle::_vmindex_offset;
2216
2217 int sun_dyn_BoundMethodHandle::_argument_offset;
2218 int sun_dyn_BoundMethodHandle::_vmargslot_offset;
2219
2220 int sun_dyn_AdapterMethodHandle::_conversion_offset;
2221
2222 void java_dyn_MethodHandle::compute_offsets() {
2223 klassOop k = SystemDictionary::MethodHandle_klass();
2224 if (k != NULL && EnableMethodHandles) {
2225 bool allow_super = false;
2226 if (AllowTransitionalJSR292) allow_super = true; // temporary, to access sun.dyn.MethodHandleImpl
2227 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::java_dyn_MethodType_signature(), allow_super);
2228 compute_offset(_vmtarget_offset, k, vmSymbols::vmtarget_name(), vmSymbols::object_signature(), allow_super);
2229 compute_offset(_vmentry_offset, k, vmSymbols::vmentry_name(), vmSymbols::machine_word_signature(), allow_super);
2230
2231 // Note: MH.vmslots (if it is present) is a hoisted copy of MH.type.form.vmslots.
2232 // It is optional pending experiments to keep or toss.
2233 compute_optional_offset(_vmslots_offset, k, vmSymbols::vmslots_name(), vmSymbols::int_signature(), allow_super);
2234 }
2235 }
2236
2237 void sun_dyn_MemberName::compute_offsets() {
2238 klassOop k = SystemDictionary::MemberName_klass();
2239 if (k != NULL && EnableMethodHandles) {
2240 compute_offset(_clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2241 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2242 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::object_signature());
2243 compute_offset(_flags_offset, k, vmSymbols::flags_name(), vmSymbols::int_signature());
2244 compute_offset(_vmtarget_offset, k, vmSymbols::vmtarget_name(), vmSymbols::object_signature());
2245 compute_offset(_vmindex_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature());
2246 }
2247 }
2248
2249 void sun_dyn_DirectMethodHandle::compute_offsets() {
2250 klassOop k = SystemDictionary::DirectMethodHandle_klass();
2251 if (k != NULL && EnableMethodHandles) {
2252 compute_offset(_vmindex_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature(), true);
2253 }
2254 }
2255
2256 void sun_dyn_BoundMethodHandle::compute_offsets() {
2257 klassOop k = SystemDictionary::BoundMethodHandle_klass();
2258 if (k != NULL && EnableMethodHandles) {
2259 compute_offset(_vmargslot_offset, k, vmSymbols::vmargslot_name(), vmSymbols::int_signature(), true);
2260 compute_offset(_argument_offset, k, vmSymbols::argument_name(), vmSymbols::object_signature(), true);
2261 }
2262 }
2263
2264 void sun_dyn_AdapterMethodHandle::compute_offsets() {
2265 klassOop k = SystemDictionary::AdapterMethodHandle_klass();
2266 if (k != NULL && EnableMethodHandles) {
2267 compute_offset(_conversion_offset, k, vmSymbols::conversion_name(), vmSymbols::int_signature(), true);
2268 }
2269 }
2270
2271 oop java_dyn_MethodHandle::type(oop mh) {
2272 return mh->obj_field(_type_offset);
2273 }
2274
2275 void java_dyn_MethodHandle::set_type(oop mh, oop mtype) {
2276 mh->obj_field_put(_type_offset, mtype);
2277 }
2278
2279 int java_dyn_MethodHandle::vmslots(oop mh) {
2280 int vmslots_offset = _vmslots_offset;
2281 if (vmslots_offset != 0) {
2282 #ifdef ASSERT
2283 int x = mh->int_field(vmslots_offset);
2284 int y = compute_vmslots(mh);
2285 assert(x == y, "correct hoisted value");
2286 #endif
2287 return mh->int_field(vmslots_offset);
2288 } else {
2289 return compute_vmslots(mh);
2290 }
2291 }
2292
2293 // if MH.vmslots exists, hoist into it the value of type.form.vmslots
2294 void java_dyn_MethodHandle::init_vmslots(oop mh) {
2295 int vmslots_offset = _vmslots_offset;
2296 if (vmslots_offset != 0) {
2297 mh->int_field_put(vmslots_offset, compute_vmslots(mh));
2298 }
2299 }
2300
2301 // fetch type.form.vmslots, which is the number of JVM stack slots
2302 // required to carry the arguments of this MH
2303 int java_dyn_MethodHandle::compute_vmslots(oop mh) {
2304 oop mtype = type(mh);
2305 if (mtype == NULL) return 0; // Java code would get NPE
2306 oop form = java_dyn_MethodType::form(mtype);
2307 if (form == NULL) return 0; // Java code would get NPE
2308 return java_dyn_MethodTypeForm::vmslots(form);
2309 }
2310
2311 // fetch the low-level entry point for this mh
2312 MethodHandleEntry* java_dyn_MethodHandle::vmentry(oop mh) {
2313 return (MethodHandleEntry*) mh->address_field(_vmentry_offset);
2314 }
2315
2316 void java_dyn_MethodHandle::set_vmentry(oop mh, MethodHandleEntry* me) {
2317 assert(_vmentry_offset != 0, "must be present");
2318
2319 // This is always the final step that initializes a valid method handle:
2320 mh->release_address_field_put(_vmentry_offset, (address) me);
2321
2322 // There should be enough memory barriers on exit from native methods
2323 // to ensure that the MH is fully initialized to all threads before
2324 // Java code can publish it in global data structures.
2325 // But just in case, we use release_address_field_put.
2326 }
2327
2328 /// MemberName accessors
2329
2330 oop sun_dyn_MemberName::clazz(oop mname) {
2331 assert(is_instance(mname), "wrong type");
2332 return mname->obj_field(_clazz_offset);
2333 }
2334
2335 void sun_dyn_MemberName::set_clazz(oop mname, oop clazz) {
2336 assert(is_instance(mname), "wrong type");
2337 mname->obj_field_put(_clazz_offset, clazz);
2338 }
2339
2340 oop sun_dyn_MemberName::name(oop mname) {
2341 assert(is_instance(mname), "wrong type");
2342 return mname->obj_field(_name_offset);
2343 }
2344
2345 void sun_dyn_MemberName::set_name(oop mname, oop name) {
2346 assert(is_instance(mname), "wrong type");
2347 mname->obj_field_put(_name_offset, name);
2348 }
2349
2350 oop sun_dyn_MemberName::type(oop mname) {
2351 assert(is_instance(mname), "wrong type");
2352 return mname->obj_field(_type_offset);
2353 }
2354
2355 void sun_dyn_MemberName::set_type(oop mname, oop type) {
2356 assert(is_instance(mname), "wrong type");
2357 mname->obj_field_put(_type_offset, type);
2358 }
2359
2360 int sun_dyn_MemberName::flags(oop mname) {
2361 assert(is_instance(mname), "wrong type");
2362 return mname->int_field(_flags_offset);
2363 }
2364
2365 void sun_dyn_MemberName::set_flags(oop mname, int flags) {
2366 assert(is_instance(mname), "wrong type");
2367 mname->int_field_put(_flags_offset, flags);
2368 }
2369
2370 oop sun_dyn_MemberName::vmtarget(oop mname) {
2371 assert(is_instance(mname), "wrong type");
2372 return mname->obj_field(_vmtarget_offset);
2373 }
2374
2375 void sun_dyn_MemberName::set_vmtarget(oop mname, oop ref) {
2376 assert(is_instance(mname), "wrong type");
2377 mname->obj_field_put(_vmtarget_offset, ref);
2378 }
2379
2380 int sun_dyn_MemberName::vmindex(oop mname) {
2381 assert(is_instance(mname), "wrong type");
2382 return mname->int_field(_vmindex_offset);
2383 }
2384
2385 void sun_dyn_MemberName::set_vmindex(oop mname, int index) {
2386 assert(is_instance(mname), "wrong type");
2387 mname->int_field_put(_vmindex_offset, index);
2388 }
2389
2390 oop java_dyn_MethodHandle::vmtarget(oop mh) {
2391 assert(is_instance(mh), "MH only");
2392 return mh->obj_field(_vmtarget_offset);
2393 }
2394
2395 void java_dyn_MethodHandle::set_vmtarget(oop mh, oop ref) {
2396 assert(is_instance(mh), "MH only");
2397 mh->obj_field_put(_vmtarget_offset, ref);
2398 }
2399
2400 int sun_dyn_DirectMethodHandle::vmindex(oop mh) {
2401 assert(is_instance(mh), "DMH only");
2402 return mh->int_field(_vmindex_offset);
2403 }
2404
2405 void sun_dyn_DirectMethodHandle::set_vmindex(oop mh, int index) {
2406 assert(is_instance(mh), "DMH only");
2407 mh->int_field_put(_vmindex_offset, index);
2408 }
2409
2410 int sun_dyn_BoundMethodHandle::vmargslot(oop mh) {
2411 assert(is_instance(mh), "BMH only");
2412 return mh->int_field(_vmargslot_offset);
2413 }
2414
2415 oop sun_dyn_BoundMethodHandle::argument(oop mh) {
2416 assert(is_instance(mh), "BMH only");
2417 return mh->obj_field(_argument_offset);
2418 }
2419
2420 int sun_dyn_AdapterMethodHandle::conversion(oop mh) {
2421 assert(is_instance(mh), "AMH only");
2422 return mh->int_field(_conversion_offset);
2423 }
2424
2425 void sun_dyn_AdapterMethodHandle::set_conversion(oop mh, int conv) {
2426 assert(is_instance(mh), "AMH only");
2427 mh->int_field_put(_conversion_offset, conv);
2428 }
2429
2430
2431 // Support for java_dyn_MethodType
2432
2433 int java_dyn_MethodType::_rtype_offset;
2434 int java_dyn_MethodType::_ptypes_offset;
2435 int java_dyn_MethodType::_form_offset;
2436
2437 void java_dyn_MethodType::compute_offsets() {
2438 klassOop k = SystemDictionary::MethodType_klass();
2439 if (k != NULL) {
2440 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2441 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2442 compute_offset(_form_offset, k, vmSymbols::form_name(), vmSymbols::java_dyn_MethodTypeForm_signature());
2443 }
2444 }
2445
2446 void java_dyn_MethodType::print_signature(oop mt, outputStream* st) {
2447 st->print("(");
2448 objArrayOop pts = ptypes(mt);
2449 for (int i = 0, limit = pts->length(); i < limit; i++) {
2450 java_lang_Class::print_signature(pts->obj_at(i), st);
2451 }
2452 st->print(")");
2453 java_lang_Class::print_signature(rtype(mt), st);
2454 }
2455
2456 Symbol* java_dyn_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2457 ResourceMark rm;
2458 stringStream buffer(128);
2459 print_signature(mt, &buffer);
2460 const char* sigstr = buffer.base();
2461 int siglen = (int) buffer.size();
2462 Symbol *name;
2463 if (!intern_if_not_found) {
2464 name = SymbolTable::probe(sigstr, siglen);
2465 } else {
2466 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2467 }
2468 return name;
2469 }
2470
2471 oop java_dyn_MethodType::rtype(oop mt) {
2472 assert(is_instance(mt), "must be a MethodType");
2473 return mt->obj_field(_rtype_offset);
2474 }
2475
2476 objArrayOop java_dyn_MethodType::ptypes(oop mt) {
2477 assert(is_instance(mt), "must be a MethodType");
2478 return (objArrayOop) mt->obj_field(_ptypes_offset);
2479 }
2480
2481 oop java_dyn_MethodType::form(oop mt) {
2482 assert(is_instance(mt), "must be a MethodType");
2483 return mt->obj_field(_form_offset);
2484 }
2485
2486 oop java_dyn_MethodType::ptype(oop mt, int idx) {
2487 return ptypes(mt)->obj_at(idx);
2488 }
2489
2490 int java_dyn_MethodType::ptype_count(oop mt) {
2491 return ptypes(mt)->length();
2492 }
2493
2494
2495
2496 // Support for java_dyn_MethodTypeForm
2497
2498 int java_dyn_MethodTypeForm::_vmslots_offset;
2499 int java_dyn_MethodTypeForm::_erasedType_offset;
2500 int java_dyn_MethodTypeForm::_genericInvoker_offset;
2501
2502 void java_dyn_MethodTypeForm::compute_offsets() {
2503 klassOop k = SystemDictionary::MethodTypeForm_klass();
2504 if (k != NULL) {
2505 compute_optional_offset(_vmslots_offset, k, vmSymbols::vmslots_name(), vmSymbols::int_signature(), true);
2506 compute_optional_offset(_erasedType_offset, k, vmSymbols::erasedType_name(), vmSymbols::java_dyn_MethodType_signature(), true);
2507 compute_optional_offset(_genericInvoker_offset, k, vmSymbols::genericInvoker_name(), vmSymbols::java_dyn_MethodHandle_signature(), true);
2508 if (_genericInvoker_offset == 0) _genericInvoker_offset = -1; // set to explicit "empty" value
2509 }
2510 }
2511
2512 int java_dyn_MethodTypeForm::vmslots(oop mtform) {
2513 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only");
2514 return mtform->int_field(_vmslots_offset);
2515 }
2516
2517 oop java_dyn_MethodTypeForm::erasedType(oop mtform) {
2518 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only");
2519 return mtform->obj_field(_erasedType_offset);
2520 }
2521
2522 oop java_dyn_MethodTypeForm::genericInvoker(oop mtform) {
2523 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only");
2524 return mtform->obj_field(_genericInvoker_offset);
2525 }
2526
2527
2528 // Support for java_dyn_CallSite
2529
2530 int java_dyn_CallSite::_target_offset;
2531
2532 void java_dyn_CallSite::compute_offsets() {
2533 if (!EnableInvokeDynamic) return;
2534 klassOop k = SystemDictionary::CallSite_klass();
2535 if (k != NULL) {
2536 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_dyn_MethodHandle_signature());
2537 }
2538 }
2539
2540 oop java_dyn_CallSite::target(oop site) {
2541 return site->obj_field(_target_offset);
2542 }
2543
2544 void java_dyn_CallSite::set_target(oop site, oop target) {
2545 site->obj_field_put(_target_offset, target);
2546 }
2547
2548
2549 // Support for java_security_AccessControlContext
2550
2551 int java_security_AccessControlContext::_context_offset = 0;
2552 int java_security_AccessControlContext::_privilegedContext_offset = 0;
2553 int java_security_AccessControlContext::_isPrivileged_offset = 0;
2554
2555 void java_security_AccessControlContext::compute_offsets() {
2556 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
2557 fieldDescriptor fd;
2558 instanceKlass* ik = instanceKlass::cast(SystemDictionary::AccessControlContext_klass());
2559
2560 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
2561 fatal("Invalid layout of java.security.AccessControlContext");
2562 }
2563 _context_offset = fd.offset();
2564
2565 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
2566 fatal("Invalid layout of java.security.AccessControlContext");
2567 }
2568 _privilegedContext_offset = fd.offset();
2569
2570 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
2571 fatal("Invalid layout of java.security.AccessControlContext");
2572 }
2573 _isPrivileged_offset = fd.offset();
2574 }
2575
2576
2577 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
2578 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
2579 // Ensure klass is initialized
2580 instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
2581 // Allocate result
2582 oop result = instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
2583 // Fill in values
2584 result->obj_field_put(_context_offset, context());
2585 result->obj_field_put(_privilegedContext_offset, privileged_context());
2586 result->bool_field_put(_isPrivileged_offset, isPrivileged);
2587 return result;
2588 }
2589
2590
2591 // Support for java_lang_ClassLoader
2592
2593 oop java_lang_ClassLoader::parent(oop loader) {
2594 assert(loader->is_oop(), "loader must be oop");
2595 return loader->obj_field(parent_offset);
2596 }
2597
2598
2599 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
2600 // Fix for 4474172; see evaluation for more details
2601 loader = non_reflection_class_loader(loader);
2602
2603 oop cl = SystemDictionary::java_system_loader();
2604 while(cl != NULL) {
2605 if (cl == loader) return true;
2606 cl = parent(cl);
2607 }
2608 return false;
2609 }
2610
2611 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
2612 if (loader != NULL) {
2613 // See whether this is one of the class loaders associated with
2614 // the generated bytecodes for reflection, and if so, "magically"
2615 // delegate to its parent to prevent class loading from occurring
2616 // in places where applications using reflection didn't expect it.
2617 klassOop delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
2618 // This might be null in non-1.4 JDKs
2619 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
2620 return parent(loader);
2621 }
2622 }
2623 return loader;
2624 }
2625
2626
2627 // Support for java_lang_System
2628
2629 void java_lang_System::compute_offsets() {
2630 assert(offset_of_static_fields == 0, "offsets should be initialized only once");
2631
2632 instanceKlass* ik = instanceKlass::cast(SystemDictionary::System_klass());
2633 offset_of_static_fields = ik->offset_of_static_fields();
2634 }
2635
2636 int java_lang_System::in_offset_in_bytes() {
2637 return (offset_of_static_fields + static_in_offset);
2638 }
2639
2640
2641 int java_lang_System::out_offset_in_bytes() {
2642 return (offset_of_static_fields + static_out_offset);
2643 }
2644
2645
2646 int java_lang_System::err_offset_in_bytes() {
2647 return (offset_of_static_fields + static_err_offset);
2648 }
2649
2650
2651
2652 int java_lang_String::value_offset;
2653 int java_lang_String::offset_offset;
2654 int java_lang_String::count_offset;
2655 int java_lang_String::hash_offset;
2656 int java_lang_Class::klass_offset;
2657 int java_lang_Class::array_klass_offset;
2658 int java_lang_Class::resolved_constructor_offset;
2659 int java_lang_Class::number_of_fake_oop_fields;
2660 int java_lang_Throwable::backtrace_offset;
2661 int java_lang_Throwable::detailMessage_offset;
2662 int java_lang_Throwable::cause_offset;
2663 int java_lang_Throwable::stackTrace_offset;
2664 int java_lang_reflect_AccessibleObject::override_offset;
2665 int java_lang_reflect_Method::clazz_offset;
2666 int java_lang_reflect_Method::name_offset;
2667 int java_lang_reflect_Method::returnType_offset;
2668 int java_lang_reflect_Method::parameterTypes_offset;
2669 int java_lang_reflect_Method::exceptionTypes_offset;
2670 int java_lang_reflect_Method::slot_offset;
2671 int java_lang_reflect_Method::modifiers_offset;
2672 int java_lang_reflect_Method::signature_offset;
2673 int java_lang_reflect_Method::annotations_offset;
2674 int java_lang_reflect_Method::parameter_annotations_offset;
2675 int java_lang_reflect_Method::annotation_default_offset;
2676 int java_lang_reflect_Constructor::clazz_offset;
2677 int java_lang_reflect_Constructor::parameterTypes_offset;
2678 int java_lang_reflect_Constructor::exceptionTypes_offset;
2679 int java_lang_reflect_Constructor::slot_offset;
2680 int java_lang_reflect_Constructor::modifiers_offset;
2681 int java_lang_reflect_Constructor::signature_offset;
2682 int java_lang_reflect_Constructor::annotations_offset;
2683 int java_lang_reflect_Constructor::parameter_annotations_offset;
2684 int java_lang_reflect_Field::clazz_offset;
2685 int java_lang_reflect_Field::name_offset;
2686 int java_lang_reflect_Field::type_offset;
2687 int java_lang_reflect_Field::slot_offset;
2688 int java_lang_reflect_Field::modifiers_offset;
2689 int java_lang_reflect_Field::signature_offset;
2690 int java_lang_reflect_Field::annotations_offset;
2691 int java_lang_boxing_object::value_offset;
2692 int java_lang_boxing_object::long_value_offset;
2693 int java_lang_ref_Reference::referent_offset;
2694 int java_lang_ref_Reference::queue_offset;
2695 int java_lang_ref_Reference::next_offset;
2696 int java_lang_ref_Reference::discovered_offset;
2697 int java_lang_ref_Reference::static_lock_offset;
2698 int java_lang_ref_Reference::static_pending_offset;
2699 int java_lang_ref_Reference::number_of_fake_oop_fields;
2700 int java_lang_ref_SoftReference::timestamp_offset;
2701 int java_lang_ref_SoftReference::static_clock_offset;
2702 int java_lang_ClassLoader::parent_offset;
2703 int java_lang_System::offset_of_static_fields;
2704 int java_lang_System::static_in_offset;
2705 int java_lang_System::static_out_offset;
2706 int java_lang_System::static_err_offset;
2707 int java_lang_StackTraceElement::declaringClass_offset;
2708 int java_lang_StackTraceElement::methodName_offset;
2709 int java_lang_StackTraceElement::fileName_offset;
2710 int java_lang_StackTraceElement::lineNumber_offset;
2711 int java_lang_AssertionStatusDirectives::classes_offset;
2712 int java_lang_AssertionStatusDirectives::classEnabled_offset;
2713 int java_lang_AssertionStatusDirectives::packages_offset;
2714 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
2715 int java_lang_AssertionStatusDirectives::deflt_offset;
2716 int java_nio_Buffer::_limit_offset;
2717 int sun_misc_AtomicLongCSImpl::_value_offset;
2718 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
2719 int sun_reflect_ConstantPool::_cp_oop_offset;
2720 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
2721
2722
2723 // Support for java_lang_StackTraceElement
2724
2725 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
2726 element->obj_field_put(fileName_offset, value);
2727 }
2728
2729 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
2730 element->obj_field_put(declaringClass_offset, value);
2731 }
2732
2733 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
2734 element->obj_field_put(methodName_offset, value);
2735 }
2736
2737 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
2738 element->int_field_put(lineNumber_offset, value);
2739 }
2740
2741
2742 // Support for java Assertions - java_lang_AssertionStatusDirectives.
2743
2744 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
2745 o->obj_field_put(classes_offset, val);
2746 }
2747
2748 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
2749 o->obj_field_put(classEnabled_offset, val);
2750 }
2751
2752 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
2753 o->obj_field_put(packages_offset, val);
2754 }
2755
2756 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
2757 o->obj_field_put(packageEnabled_offset, val);
2758 }
2759
2760 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
2761 o->bool_field_put(deflt_offset, val);
2762 }
2763
2764
2765 // Support for intrinsification of java.nio.Buffer.checkIndex
2766 int java_nio_Buffer::limit_offset() {
2767 return _limit_offset;
2768 }
2769
2770
2771 void java_nio_Buffer::compute_offsets() {
2772 klassOop k = SystemDictionary::java_nio_Buffer_klass();
2773 assert(k != NULL, "must be loaded in 1.4+");
2774 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
2775 }
2776
2777 // Support for intrinsification of sun.misc.AtomicLongCSImpl.attemptUpdate
2778 int sun_misc_AtomicLongCSImpl::value_offset() {
2779 assert(SystemDictionary::sun_misc_AtomicLongCSImpl_klass() != NULL, "can't call this");
2780 return _value_offset;
2781 }
2782
2783
2784 void sun_misc_AtomicLongCSImpl::compute_offsets() {
2785 klassOop k = SystemDictionary::sun_misc_AtomicLongCSImpl_klass();
2786 // If this class is not present, its value field offset won't be referenced.
2787 if (k != NULL) {
2788 compute_offset(_value_offset, k, vmSymbols::value_name(), vmSymbols::long_signature());
2789 }
2790 }
2791
2792 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
2793 if (_owner_offset != 0) return;
2794
2795 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
2796 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
2797 klassOop k = SystemDictionary::abstract_ownable_synchronizer_klass();
2798 compute_offset(_owner_offset, k,
2799 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
2800 }
2801
2802 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
2803 assert(_owner_offset != 0, "Must be initialized");
2804 return obj->obj_field(_owner_offset);
2805 }
2806
2807 // Compute hard-coded offsets
2808 // Invoked before SystemDictionary::initialize, so pre-loaded classes
2809 // are not available to determine the offset_of_static_fields.
2810 void JavaClasses::compute_hard_coded_offsets() {
2811 const int x = heapOopSize;
2812 const int header = instanceOopDesc::base_offset_in_bytes();
2813
2814 // Do the String Class
2815 java_lang_String::value_offset = java_lang_String::hc_value_offset * x + header;
2816 java_lang_String::offset_offset = java_lang_String::hc_offset_offset * x + header;
2817 java_lang_String::count_offset = java_lang_String::offset_offset + sizeof (jint);
2818 java_lang_String::hash_offset = java_lang_String::count_offset + sizeof (jint);
2819
2820 // Do the Class Class
2821 java_lang_Class::klass_offset = java_lang_Class::hc_klass_offset * x + header;
2822 java_lang_Class::array_klass_offset = java_lang_Class::hc_array_klass_offset * x + header;
2823 java_lang_Class::resolved_constructor_offset = java_lang_Class::hc_resolved_constructor_offset * x + header;
2824
2825 // This is NOT an offset
2826 java_lang_Class::number_of_fake_oop_fields = java_lang_Class::hc_number_of_fake_oop_fields;
2827
2828 // Throwable Class
2829 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
2830 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
2831 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
2832 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
2833
2834 // java_lang_boxing_object
2835 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
2836 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
2837
2838 // java_lang_ref_Reference:
2839 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
2840 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
2841 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
2842 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
2843 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
2844 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
2845 // Artificial fields for java_lang_ref_Reference
2846 // The first field is for the discovered field added in 1.4
2847 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
2848
2849 // java_lang_ref_SoftReference Class
2850 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
2851 // Don't multiply static fields because they are always in wordSize units
2852 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
2853
2854 // java_lang_ClassLoader
2855 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
2856
2857 // java_lang_System
2858 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
2859 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
2860 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
2861
2862 // java_lang_StackTraceElement
2863 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
2864 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
2865 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
2866 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
2867 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
2868 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
2869 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
2870 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
2871 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
2872
2873 }
2874
2875
2876 // Compute non-hard-coded field offsets of all the classes in this file
2877 void JavaClasses::compute_offsets() {
2878
2879 java_lang_Class::compute_offsets();
2880 java_lang_System::compute_offsets();
2881 java_lang_Thread::compute_offsets();
2882 java_lang_ThreadGroup::compute_offsets();
2883 if (EnableMethodHandles) {
2884 java_dyn_MethodHandle::compute_offsets();
2885 sun_dyn_MemberName::compute_offsets();
2886 sun_dyn_DirectMethodHandle::compute_offsets();
2887 sun_dyn_BoundMethodHandle::compute_offsets();
2888 sun_dyn_AdapterMethodHandle::compute_offsets();
2889 java_dyn_MethodType::compute_offsets();
2890 java_dyn_MethodTypeForm::compute_offsets();
2891 }
2892 if (EnableInvokeDynamic) {
2893 java_dyn_CallSite::compute_offsets();
2894 }
2895 java_security_AccessControlContext::compute_offsets();
2896 // Initialize reflection classes. The layouts of these classes
2897 // changed with the new reflection implementation in JDK 1.4, and
2898 // since the Universe doesn't know what JDK version it is until this
2899 // point we defer computation of these offsets until now.
2900 java_lang_reflect_AccessibleObject::compute_offsets();
2901 java_lang_reflect_Method::compute_offsets();
2902 java_lang_reflect_Constructor::compute_offsets();
2903 java_lang_reflect_Field::compute_offsets();
2904 if (JDK_Version::is_gte_jdk14x_version()) {
2905 java_nio_Buffer::compute_offsets();
2906 }
2907 if (JDK_Version::is_gte_jdk15x_version()) {
2908 sun_reflect_ConstantPool::compute_offsets();
2909 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
2910 }
2911 sun_misc_AtomicLongCSImpl::compute_offsets();
2912
2913 // generated interpreter code wants to know about the offsets we just computed:
2914 AbstractAssembler::update_delayed_values();
2915 }
2916
2917 #ifndef PRODUCT
2918
2919 // These functions exist to assert the validity of hard-coded field offsets to guard
2920 // against changes in the class files
2921
2922 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
2923 EXCEPTION_MARK;
2924 fieldDescriptor fd;
2925 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
2926 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
2927 instanceKlassHandle h_klass (THREAD, k);
2928 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
2929 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
2930 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
2931 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
2932 return false;
2933 }
2934 if (fd.is_static()) {
2935 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
2936 return false;
2937 }
2938 if (fd.offset() == hardcoded_offset ) {
2939 return true;
2940 } else {
2941 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
2942 klass_name, field_name, hardcoded_offset, fd.offset());
2943 return false;
2944 }
2945 }
2946
2947
2948 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
2949 EXCEPTION_MARK;
2950 fieldDescriptor fd;
2951 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
2952 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
2953 instanceKlassHandle h_klass (THREAD, k);
2954 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
2955 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
2956 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
2957 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
2958 return false;
2959 }
2960 if (!fd.is_static()) {
2961 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
2962 return false;
2963 }
2964 if (fd.offset() == hardcoded_offset + h_klass->offset_of_static_fields()) {
2965 return true;
2966 } else {
2967 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());
2968 return false;
2969 }
2970 }
2971
2972
2973 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
2974 EXCEPTION_MARK;
2975 fieldDescriptor fd;
2976 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
2977 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
2978 instanceKlassHandle h_klass (THREAD, k);
2979 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
2980 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
2981 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
2982 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
2983 return false;
2984 }
2985 if (!fd.is_static() || !fd.has_initial_value()) {
2986 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
2987 return false;
2988 }
2989 if (!fd.initial_value_tag().is_int()) {
2990 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
2991 return false;
2992 }
2993 jint field_value = fd.int_initial_value();
2994 if (field_value == hardcoded_constant) {
2995 return true;
2996 } else {
2997 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);
2998 return false;
2999 }
3000 }
3001
3002
3003 // Check the hard-coded field offsets of all the classes in this file
3004
3005 void JavaClasses::check_offsets() {
3006 bool valid = true;
3007
3008 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3009 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3010
3011 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3012 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3013
3014 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3015 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3016
3017 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3018 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3019
3020 // java.lang.String
3021
3022 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3023 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3024 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3025 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3026
3027 // java.lang.Class
3028
3029 // Fake fields
3030 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3031 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3032 // CHECK_OFFSET("java/lang/Class", java_lang_Class, resolved_constructor); // %%% this needs to be checked
3033
3034 // java.lang.Throwable
3035
3036 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3037 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3038 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3039 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3040
3041 // Boxed primitive objects (java_lang_boxing_object)
3042
3043 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3044 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3045 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3046 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3047 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3048 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3049 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3050 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3051
3052 // java.lang.ClassLoader
3053
3054 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3055
3056 // java.lang.System
3057
3058 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3059 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3060 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3061
3062 // java.lang.StackTraceElement
3063
3064 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3065 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3066 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3067 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3068
3069 // java.lang.ref.Reference
3070
3071 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3072 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3073 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3074 // Fake field
3075 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3076 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3077 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3078
3079 // java.lang.ref.SoftReference
3080
3081 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3082 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3083
3084 // java.lang.AssertionStatusDirectives
3085 //
3086 // The CheckAssertionStatusDirectives boolean can be removed from here and
3087 // globals.hpp after the AssertionStatusDirectives class has been integrated
3088 // into merlin "for some time." Without it, the vm will fail with early
3089 // merlin builds.
3090
3091 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) {
3092 const char* nm = "java/lang/AssertionStatusDirectives";
3093 const char* sig = "[Ljava/lang/String;";
3094 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3095 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3096 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3097 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3098 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3099 }
3100
3101 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3102 }
3103
3104 #endif // PRODUCT
3105
3106 void javaClasses_init() {
3107 JavaClasses::compute_offsets();
3108 JavaClasses::check_offsets();
3109 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3110 }