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