Tue, 21 Dec 2010 04:37:30 -0800
7008165: Garbage in ClassFormatError message
Summary: When bootstrap_method_ref in BootstrapMethods attribute points to a wrong CP entry (non-MethodHandle), JVM throws ClassFormatError with a message, where method index and class file name is garbage.
Reviewed-by: iveresov
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 */
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
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 }
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 }
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 }
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 }
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 }
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);
125 return h_obj;
126 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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");
180 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
181 static to_java_string_fn_t _to_java_string_fn = NULL;
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, os::dll_lookup(lib_handle, "NewStringPlatform"));
186 if (_to_java_string_fn == NULL) {
187 fatal("NewStringPlatform missing");
188 }
189 }
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 }
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) {
205 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
206 static to_platform_string_fn_t _to_platform_string_fn = NULL;
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, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
211 if (_to_platform_string_fn == NULL) {
212 fatal("GetStringPlatformChars missing");
213 }
214 }
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 }
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);
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 }
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);
255 typeArrayOop from_buffer = h_value();
256 typeArrayOop to_buffer = java_lang_String::value(string());
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 }
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);
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 }
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 }
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 }
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 }
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 }
316 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
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 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
321 return UNICODE::as_utf8(position, length, buf, buflen);
322 }
324 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
325 typeArrayOop value = java_lang_String::value(java_string);
326 int offset = java_lang_String::offset(java_string);
327 int length = java_lang_String::length(java_string);
328 assert(start + len <= length, "just checking");
329 jchar* position = value->char_at_addr(offset + start);
330 return UNICODE::as_utf8(position, len);
331 }
333 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
334 assert(SharedSkipVerify ||
335 java_string->klass() == SystemDictionary::String_klass(),
336 "must be java_string");
337 typeArrayOop value = java_lang_String::value(java_string);
338 int offset = java_lang_String::offset(java_string);
339 int length = java_lang_String::length(java_string);
340 if (length != len) {
341 return false;
342 }
343 for (int i = 0; i < len; i++) {
344 if (value->char_at(i + offset) != chars[i]) {
345 return false;
346 }
347 }
348 return true;
349 }
351 void java_lang_String::print(Handle java_string, outputStream* st) {
352 oop obj = java_string();
353 assert(obj->klass() == SystemDictionary::String_klass(), "must be java_string");
354 typeArrayOop value = java_lang_String::value(obj);
355 int offset = java_lang_String::offset(obj);
356 int length = java_lang_String::length(obj);
358 int end = MIN2(length, 100);
359 if (value == NULL) {
360 // This can happen if, e.g., printing a String
361 // object before its initializer has been called
362 st->print_cr("NULL");
363 } else {
364 st->print("\"");
365 for (int index = 0; index < length; index++) {
366 st->print("%c", value->char_at(index + offset));
367 }
368 st->print("\"");
369 }
370 }
373 oop java_lang_Class::create_mirror(KlassHandle k, TRAPS) {
374 assert(k->java_mirror() == NULL, "should only assign mirror once");
375 // Use this moment of initialization to cache modifier_flags also,
376 // to support Class.getModifiers(). Instance classes recalculate
377 // the cached flags after the class file is parsed, but before the
378 // class is put into the system dictionary.
379 int computed_modifiers = k->compute_modifier_flags(CHECK_0);
380 k->set_modifier_flags(computed_modifiers);
381 if (SystemDictionary::Class_klass_loaded()) {
382 // Allocate mirror (java.lang.Class instance)
383 Handle mirror = instanceKlass::cast(SystemDictionary::Class_klass())->allocate_permanent_instance(CHECK_0);
384 // Setup indirections
385 mirror->obj_field_put(klass_offset, k());
386 k->set_java_mirror(mirror());
387 // It might also have a component mirror. This mirror must already exist.
388 if (k->oop_is_javaArray()) {
389 Handle comp_mirror;
390 if (k->oop_is_typeArray()) {
391 BasicType type = typeArrayKlass::cast(k->as_klassOop())->element_type();
392 comp_mirror = Universe::java_mirror(type);
393 assert(comp_mirror.not_null(), "must have primitive mirror");
394 } else if (k->oop_is_objArray()) {
395 klassOop element_klass = objArrayKlass::cast(k->as_klassOop())->element_klass();
396 if (element_klass != NULL
397 && (Klass::cast(element_klass)->oop_is_instance() ||
398 Klass::cast(element_klass)->oop_is_javaArray())) {
399 comp_mirror = Klass::cast(element_klass)->java_mirror();
400 assert(comp_mirror.not_null(), "must have element mirror");
401 }
402 // else some object array internal to the VM, like systemObjArrayKlassObj
403 }
404 if (comp_mirror.not_null()) {
405 // Two-way link between the array klass and its component mirror:
406 arrayKlass::cast(k->as_klassOop())->set_component_mirror(comp_mirror());
407 set_array_klass(comp_mirror(), k->as_klassOop());
408 }
409 }
410 return mirror();
411 } else {
412 return NULL;
413 }
414 }
417 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
418 // This should be improved by adding a field at the Java level or by
419 // introducing a new VM klass (see comment in ClassFileParser)
420 oop java_class = instanceKlass::cast(SystemDictionary::Class_klass())->allocate_permanent_instance(CHECK_0);
421 if (type != T_VOID) {
422 klassOop aklass = Universe::typeArrayKlassObj(type);
423 assert(aklass != NULL, "correct bootstrap");
424 set_array_klass(java_class, aklass);
425 }
426 return java_class;
427 }
430 klassOop java_lang_Class::as_klassOop(oop java_class) {
431 //%note memory_2
432 klassOop k = klassOop(java_class->obj_field(klass_offset));
433 assert(k == NULL || k->is_klass(), "type check");
434 return k;
435 }
438 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
439 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
440 symbolOop name = NULL;
441 bool is_instance = false;
442 if (is_primitive(java_class)) {
443 name = vmSymbols::type_signature(primitive_type(java_class));
444 } else {
445 klassOop k = as_klassOop(java_class);
446 is_instance = Klass::cast(k)->oop_is_instance();
447 name = Klass::cast(k)->name();
448 }
449 if (name == NULL) {
450 st->print("<null>");
451 return;
452 }
453 if (is_instance) st->print("L");
454 st->write((char*) name->base(), (int) name->utf8_length());
455 if (is_instance) st->print(";");
456 }
458 symbolOop java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
459 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
460 symbolOop name = NULL;
461 if (is_primitive(java_class)) {
462 return vmSymbols::type_signature(primitive_type(java_class));
463 } else {
464 klassOop k = as_klassOop(java_class);
465 if (!Klass::cast(k)->oop_is_instance()) {
466 return Klass::cast(k)->name();
467 } else {
468 ResourceMark rm;
469 const char* sigstr = Klass::cast(k)->signature_name();
470 int siglen = (int) strlen(sigstr);
471 if (!intern_if_not_found)
472 return SymbolTable::probe(sigstr, siglen);
473 else
474 return oopFactory::new_symbol(sigstr, siglen, THREAD);
475 }
476 }
477 }
480 klassOop java_lang_Class::array_klass(oop java_class) {
481 klassOop k = klassOop(java_class->obj_field(array_klass_offset));
482 assert(k == NULL || k->is_klass() && Klass::cast(k)->oop_is_javaArray(), "should be array klass");
483 return k;
484 }
487 void java_lang_Class::set_array_klass(oop java_class, klassOop klass) {
488 assert(klass->is_klass() && Klass::cast(klass)->oop_is_javaArray(), "should be array klass");
489 java_class->obj_field_put(array_klass_offset, klass);
490 }
493 methodOop java_lang_Class::resolved_constructor(oop java_class) {
494 oop constructor = java_class->obj_field(resolved_constructor_offset);
495 assert(constructor == NULL || constructor->is_method(), "should be method");
496 return methodOop(constructor);
497 }
500 void java_lang_Class::set_resolved_constructor(oop java_class, methodOop constructor) {
501 assert(constructor->is_method(), "should be method");
502 java_class->obj_field_put(resolved_constructor_offset, constructor);
503 }
506 bool java_lang_Class::is_primitive(oop java_class) {
507 // should assert:
508 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
509 klassOop k = klassOop(java_class->obj_field(klass_offset));
510 return k == NULL;
511 }
514 BasicType java_lang_Class::primitive_type(oop java_class) {
515 assert(java_lang_Class::is_primitive(java_class), "just checking");
516 klassOop ak = klassOop(java_class->obj_field(array_klass_offset));
517 BasicType type = T_VOID;
518 if (ak != NULL) {
519 // Note: create_basic_type_mirror above initializes ak to a non-null value.
520 type = arrayKlass::cast(ak)->element_type();
521 } else {
522 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
523 }
524 assert(Universe::java_mirror(type) == java_class, "must be consistent");
525 return type;
526 }
528 BasicType java_lang_Class::as_BasicType(oop java_class, klassOop* reference_klass) {
529 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
530 if (is_primitive(java_class)) {
531 if (reference_klass != NULL)
532 (*reference_klass) = NULL;
533 return primitive_type(java_class);
534 } else {
535 if (reference_klass != NULL)
536 (*reference_klass) = as_klassOop(java_class);
537 return T_OBJECT;
538 }
539 }
542 oop java_lang_Class::primitive_mirror(BasicType t) {
543 oop mirror = Universe::java_mirror(t);
544 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
545 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
546 return mirror;
547 }
549 bool java_lang_Class::offsets_computed = false;
550 int java_lang_Class::classRedefinedCount_offset = -1;
551 int java_lang_Class::parallelCapable_offset = -1;
553 void java_lang_Class::compute_offsets() {
554 assert(!offsets_computed, "offsets should be initialized only once");
555 offsets_computed = true;
557 klassOop k = SystemDictionary::Class_klass();
558 // The classRedefinedCount field is only present starting in 1.5,
559 // so don't go fatal.
560 compute_optional_offset(classRedefinedCount_offset,
561 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
563 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
564 klassOop k1 = SystemDictionary::ClassLoader_klass();
565 compute_optional_offset(parallelCapable_offset,
566 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
567 }
569 // For class loader classes, parallelCapable defined
570 // based on non-null field
571 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
572 bool java_lang_Class::parallelCapable(oop class_loader) {
573 if (!JDK_Version::is_gte_jdk17x_version()
574 || parallelCapable_offset == -1) {
575 // Default for backward compatibility is false
576 return false;
577 }
578 return (class_loader->obj_field(parallelCapable_offset) != NULL);
579 }
581 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
582 if (!JDK_Version::is_gte_jdk15x_version()
583 || classRedefinedCount_offset == -1) {
584 // The classRedefinedCount field is only present starting in 1.5.
585 // If we don't have an offset for it then just return -1 as a marker.
586 return -1;
587 }
589 return the_class_mirror->int_field(classRedefinedCount_offset);
590 }
592 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
593 if (!JDK_Version::is_gte_jdk15x_version()
594 || classRedefinedCount_offset == -1) {
595 // The classRedefinedCount field is only present starting in 1.5.
596 // If we don't have an offset for it then nothing to set.
597 return;
598 }
600 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
601 }
604 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
605 // platform thread structure, and a eetop offset which was used for thread
606 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
607 // merged, so in the HotSpot VM we just use the eetop field for the thread
608 // instead of the privateInfo_offset.
609 //
610 // Note: The stackSize field is only present starting in 1.4.
612 int java_lang_Thread::_name_offset = 0;
613 int java_lang_Thread::_group_offset = 0;
614 int java_lang_Thread::_contextClassLoader_offset = 0;
615 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
616 int java_lang_Thread::_priority_offset = 0;
617 int java_lang_Thread::_eetop_offset = 0;
618 int java_lang_Thread::_daemon_offset = 0;
619 int java_lang_Thread::_stillborn_offset = 0;
620 int java_lang_Thread::_stackSize_offset = 0;
621 int java_lang_Thread::_tid_offset = 0;
622 int java_lang_Thread::_thread_status_offset = 0;
623 int java_lang_Thread::_park_blocker_offset = 0;
624 int java_lang_Thread::_park_event_offset = 0 ;
627 void java_lang_Thread::compute_offsets() {
628 assert(_group_offset == 0, "offsets should be initialized only once");
630 klassOop k = SystemDictionary::Thread_klass();
631 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature());
632 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
633 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
634 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
635 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
636 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
637 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
638 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
639 // The stackSize field is only present starting in 1.4, so don't go fatal.
640 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
641 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
642 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
643 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
644 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
645 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
646 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
647 vmSymbols::long_signature());
648 }
651 JavaThread* java_lang_Thread::thread(oop java_thread) {
652 return (JavaThread*)java_thread->address_field(_eetop_offset);
653 }
656 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
657 java_thread->address_field_put(_eetop_offset, (address)thread);
658 }
661 typeArrayOop java_lang_Thread::name(oop java_thread) {
662 oop name = java_thread->obj_field(_name_offset);
663 assert(name == NULL || (name->is_typeArray() && typeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking");
664 return typeArrayOop(name);
665 }
668 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) {
669 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL");
670 java_thread->obj_field_put(_name_offset, name);
671 }
674 ThreadPriority java_lang_Thread::priority(oop java_thread) {
675 return (ThreadPriority)java_thread->int_field(_priority_offset);
676 }
679 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
680 java_thread->int_field_put(_priority_offset, priority);
681 }
684 oop java_lang_Thread::threadGroup(oop java_thread) {
685 return java_thread->obj_field(_group_offset);
686 }
689 bool java_lang_Thread::is_stillborn(oop java_thread) {
690 return java_thread->bool_field(_stillborn_offset) != 0;
691 }
694 // We never have reason to turn the stillborn bit off
695 void java_lang_Thread::set_stillborn(oop java_thread) {
696 java_thread->bool_field_put(_stillborn_offset, true);
697 }
700 bool java_lang_Thread::is_alive(oop java_thread) {
701 JavaThread* thr = java_lang_Thread::thread(java_thread);
702 return (thr != NULL);
703 }
706 bool java_lang_Thread::is_daemon(oop java_thread) {
707 return java_thread->bool_field(_daemon_offset) != 0;
708 }
711 void java_lang_Thread::set_daemon(oop java_thread) {
712 java_thread->bool_field_put(_daemon_offset, true);
713 }
715 oop java_lang_Thread::context_class_loader(oop java_thread) {
716 return java_thread->obj_field(_contextClassLoader_offset);
717 }
719 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
720 return java_thread->obj_field(_inheritedAccessControlContext_offset);
721 }
724 jlong java_lang_Thread::stackSize(oop java_thread) {
725 // The stackSize field is only present starting in 1.4
726 if (_stackSize_offset > 0) {
727 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check");
728 return java_thread->long_field(_stackSize_offset);
729 } else {
730 return 0;
731 }
732 }
734 // Write the thread status value to threadStatus field in java.lang.Thread java class.
735 void java_lang_Thread::set_thread_status(oop java_thread,
736 java_lang_Thread::ThreadStatus status) {
737 assert(JavaThread::current()->thread_state() == _thread_in_vm, "Java Thread is not running in vm");
738 // The threadStatus is only present starting in 1.5
739 if (_thread_status_offset > 0) {
740 java_thread->int_field_put(_thread_status_offset, status);
741 }
742 }
744 // Read thread status value from threadStatus field in java.lang.Thread java class.
745 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
746 assert(Thread::current()->is_VM_thread() ||
747 JavaThread::current()->thread_state() == _thread_in_vm,
748 "Java Thread is not running in vm");
749 // The threadStatus is only present starting in 1.5
750 if (_thread_status_offset > 0) {
751 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
752 } else {
753 // All we can easily figure out is if it is alive, but that is
754 // enough info for a valid unknown status.
755 // These aren't restricted to valid set ThreadStatus values, so
756 // use JVMTI values and cast.
757 JavaThread* thr = java_lang_Thread::thread(java_thread);
758 if (thr == NULL) {
759 // the thread hasn't run yet or is in the process of exiting
760 return NEW;
761 }
762 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
763 }
764 }
767 jlong java_lang_Thread::thread_id(oop java_thread) {
768 // The thread ID field is only present starting in 1.5
769 if (_tid_offset > 0) {
770 return java_thread->long_field(_tid_offset);
771 } else {
772 return 0;
773 }
774 }
776 oop java_lang_Thread::park_blocker(oop java_thread) {
777 assert(JDK_Version::current().supports_thread_park_blocker() &&
778 _park_blocker_offset != 0, "Must support parkBlocker field");
780 if (_park_blocker_offset > 0) {
781 return java_thread->obj_field(_park_blocker_offset);
782 }
784 return NULL;
785 }
787 jlong java_lang_Thread::park_event(oop java_thread) {
788 if (_park_event_offset > 0) {
789 return java_thread->long_field(_park_event_offset);
790 }
791 return 0;
792 }
794 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
795 if (_park_event_offset > 0) {
796 java_thread->long_field_put(_park_event_offset, ptr);
797 return true;
798 }
799 return false;
800 }
803 const char* java_lang_Thread::thread_status_name(oop java_thread) {
804 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status");
805 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
806 switch (status) {
807 case NEW : return "NEW";
808 case RUNNABLE : return "RUNNABLE";
809 case SLEEPING : return "TIMED_WAITING (sleeping)";
810 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
811 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
812 case PARKED : return "WAITING (parking)";
813 case PARKED_TIMED : return "TIMED_WAITING (parking)";
814 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
815 case TERMINATED : return "TERMINATED";
816 default : return "UNKNOWN";
817 };
818 }
819 int java_lang_ThreadGroup::_parent_offset = 0;
820 int java_lang_ThreadGroup::_name_offset = 0;
821 int java_lang_ThreadGroup::_threads_offset = 0;
822 int java_lang_ThreadGroup::_groups_offset = 0;
823 int java_lang_ThreadGroup::_maxPriority_offset = 0;
824 int java_lang_ThreadGroup::_destroyed_offset = 0;
825 int java_lang_ThreadGroup::_daemon_offset = 0;
826 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
827 int java_lang_ThreadGroup::_nthreads_offset = 0;
828 int java_lang_ThreadGroup::_ngroups_offset = 0;
830 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
831 assert(java_thread_group->is_oop(), "thread group must be oop");
832 return java_thread_group->obj_field(_parent_offset);
833 }
835 // ("name as oop" accessor is not necessary)
837 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
838 oop name = java_thread_group->obj_field(_name_offset);
839 // ThreadGroup.name can be null
840 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
841 }
843 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
844 assert(java_thread_group->is_oop(), "thread group must be oop");
845 return java_thread_group->int_field(_nthreads_offset);
846 }
848 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
849 oop threads = java_thread_group->obj_field(_threads_offset);
850 assert(threads != NULL, "threadgroups should have threads");
851 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
852 return objArrayOop(threads);
853 }
855 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
856 assert(java_thread_group->is_oop(), "thread group must be oop");
857 return java_thread_group->int_field(_ngroups_offset);
858 }
860 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
861 oop groups = java_thread_group->obj_field(_groups_offset);
862 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
863 return objArrayOop(groups);
864 }
866 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
867 assert(java_thread_group->is_oop(), "thread group must be oop");
868 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
869 }
871 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
872 assert(java_thread_group->is_oop(), "thread group must be oop");
873 return java_thread_group->bool_field(_destroyed_offset) != 0;
874 }
876 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
877 assert(java_thread_group->is_oop(), "thread group must be oop");
878 return java_thread_group->bool_field(_daemon_offset) != 0;
879 }
881 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
882 assert(java_thread_group->is_oop(), "thread group must be oop");
883 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
884 }
886 void java_lang_ThreadGroup::compute_offsets() {
887 assert(_parent_offset == 0, "offsets should be initialized only once");
889 klassOop k = SystemDictionary::ThreadGroup_klass();
891 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
892 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
893 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
894 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
895 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
896 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
897 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
898 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
899 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
900 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
901 }
903 oop java_lang_Throwable::backtrace(oop throwable) {
904 return throwable->obj_field_acquire(backtrace_offset);
905 }
908 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
909 throwable->release_obj_field_put(backtrace_offset, value);
910 }
913 oop java_lang_Throwable::message(oop throwable) {
914 return throwable->obj_field(detailMessage_offset);
915 }
918 oop java_lang_Throwable::message(Handle throwable) {
919 return throwable->obj_field(detailMessage_offset);
920 }
923 void java_lang_Throwable::set_message(oop throwable, oop value) {
924 throwable->obj_field_put(detailMessage_offset, value);
925 }
928 void java_lang_Throwable::clear_stacktrace(oop throwable) {
929 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
930 throwable->obj_field_put(stackTrace_offset, NULL);
931 }
934 void java_lang_Throwable::print(oop throwable, outputStream* st) {
935 ResourceMark rm;
936 klassOop k = throwable->klass();
937 assert(k != NULL, "just checking");
938 st->print("%s", instanceKlass::cast(k)->external_name());
939 oop msg = message(throwable);
940 if (msg != NULL) {
941 st->print(": %s", java_lang_String::as_utf8_string(msg));
942 }
943 }
946 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
947 ResourceMark rm;
948 klassOop k = throwable->klass();
949 assert(k != NULL, "just checking");
950 st->print("%s", instanceKlass::cast(k)->external_name());
951 oop msg = message(throwable);
952 if (msg != NULL) {
953 st->print(": %s", java_lang_String::as_utf8_string(msg));
954 }
955 }
957 // Print stack trace element to resource allocated buffer
958 char* java_lang_Throwable::print_stack_element_to_buffer(methodOop method, int bci) {
959 // Get strings and string lengths
960 instanceKlass* klass = instanceKlass::cast(method->method_holder());
961 const char* klass_name = klass->external_name();
962 int buf_len = (int)strlen(klass_name);
963 char* source_file_name;
964 if (klass->source_file_name() == NULL) {
965 source_file_name = NULL;
966 } else {
967 source_file_name = klass->source_file_name()->as_C_string();
968 buf_len += (int)strlen(source_file_name);
969 }
970 char* method_name = method->name()->as_C_string();
971 buf_len += (int)strlen(method_name);
973 // Allocate temporary buffer with extra space for formatting and line number
974 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
976 // Print stack trace line in buffer
977 sprintf(buf, "\tat %s.%s", klass_name, method_name);
978 if (method->is_native()) {
979 strcat(buf, "(Native Method)");
980 } else {
981 int line_number = method->line_number_from_bci(bci);
982 if (source_file_name != NULL && (line_number != -1)) {
983 // Sourcename and linenumber
984 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
985 } else if (source_file_name != NULL) {
986 // Just sourcename
987 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
988 } else {
989 // Neither soucename and linenumber
990 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
991 }
992 nmethod* nm = method->code();
993 if (WizardMode && nm != NULL) {
994 sprintf(buf + (int)strlen(buf), "(nmethod " PTR_FORMAT ")", (intptr_t)nm);
995 }
996 }
998 return buf;
999 }
1002 void java_lang_Throwable::print_stack_element(Handle stream, methodOop method, int bci) {
1003 ResourceMark rm;
1004 char* buf = print_stack_element_to_buffer(method, bci);
1005 print_to_stream(stream, buf);
1006 }
1008 void java_lang_Throwable::print_stack_element(outputStream *st, methodOop method, int bci) {
1009 ResourceMark rm;
1010 char* buf = print_stack_element_to_buffer(method, bci);
1011 st->print_cr("%s", buf);
1012 }
1014 void java_lang_Throwable::print_to_stream(Handle stream, const char* str) {
1015 if (stream.is_null()) {
1016 tty->print_cr("%s", str);
1017 } else {
1018 EXCEPTION_MARK;
1019 JavaValue result(T_VOID);
1020 Handle arg (THREAD, oopFactory::new_charArray(str, THREAD));
1021 if (!HAS_PENDING_EXCEPTION) {
1022 JavaCalls::call_virtual(&result,
1023 stream,
1024 KlassHandle(THREAD, stream->klass()),
1025 vmSymbolHandles::println_name(),
1026 vmSymbolHandles::char_array_void_signature(),
1027 arg,
1028 THREAD);
1029 }
1030 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1031 if (HAS_PENDING_EXCEPTION) CLEAR_PENDING_EXCEPTION;
1032 }
1034 }
1037 const char* java_lang_Throwable::no_stack_trace_message() {
1038 return "\t<<no stack trace available>>";
1039 }
1042 // Currently used only for exceptions occurring during startup
1043 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1044 Thread *THREAD = Thread::current();
1045 Handle h_throwable(THREAD, throwable);
1046 while (h_throwable.not_null()) {
1047 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1048 if (result.is_null()) {
1049 st->print_cr(no_stack_trace_message());
1050 return;
1051 }
1053 while (result.not_null()) {
1054 objArrayHandle methods (THREAD,
1055 objArrayOop(result->obj_at(trace_methods_offset)));
1056 typeArrayHandle bcis (THREAD,
1057 typeArrayOop(result->obj_at(trace_bcis_offset)));
1059 if (methods.is_null() || bcis.is_null()) {
1060 st->print_cr(no_stack_trace_message());
1061 return;
1062 }
1064 int length = methods()->length();
1065 for (int index = 0; index < length; index++) {
1066 methodOop method = methodOop(methods()->obj_at(index));
1067 if (method == NULL) goto handle_cause;
1068 int bci = bcis->ushort_at(index);
1069 print_stack_element(st, method, bci);
1070 }
1071 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1072 }
1073 handle_cause:
1074 {
1075 EXCEPTION_MARK;
1076 JavaValue result(T_OBJECT);
1077 JavaCalls::call_virtual(&result,
1078 h_throwable,
1079 KlassHandle(THREAD, h_throwable->klass()),
1080 vmSymbolHandles::getCause_name(),
1081 vmSymbolHandles::void_throwable_signature(),
1082 THREAD);
1083 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1084 if (HAS_PENDING_EXCEPTION) {
1085 CLEAR_PENDING_EXCEPTION;
1086 h_throwable = Handle();
1087 } else {
1088 h_throwable = Handle(THREAD, (oop) result.get_jobject());
1089 if (h_throwable.not_null()) {
1090 st->print("Caused by: ");
1091 print(h_throwable, st);
1092 st->cr();
1093 }
1094 }
1095 }
1096 }
1097 }
1100 void java_lang_Throwable::print_stack_trace(oop throwable, oop print_stream) {
1101 // Note: this is no longer used in Merlin, but we support it for compatibility.
1102 Thread *thread = Thread::current();
1103 Handle stream(thread, print_stream);
1104 objArrayHandle result (thread, objArrayOop(backtrace(throwable)));
1105 if (result.is_null()) {
1106 print_to_stream(stream, no_stack_trace_message());
1107 return;
1108 }
1110 while (result.not_null()) {
1111 objArrayHandle methods (thread,
1112 objArrayOop(result->obj_at(trace_methods_offset)));
1113 typeArrayHandle bcis (thread,
1114 typeArrayOop(result->obj_at(trace_bcis_offset)));
1116 if (methods.is_null() || bcis.is_null()) {
1117 print_to_stream(stream, no_stack_trace_message());
1118 return;
1119 }
1121 int length = methods()->length();
1122 for (int index = 0; index < length; index++) {
1123 methodOop method = methodOop(methods()->obj_at(index));
1124 if (method == NULL) return;
1125 int bci = bcis->ushort_at(index);
1126 print_stack_element(stream, method, bci);
1127 }
1128 result = objArrayHandle(thread, objArrayOop(result->obj_at(trace_next_offset)));
1129 }
1130 }
1132 // This class provides a simple wrapper over the internal structure of
1133 // exception backtrace to insulate users of the backtrace from needing
1134 // to know what it looks like.
1135 class BacktraceBuilder: public StackObj {
1136 private:
1137 Handle _backtrace;
1138 objArrayOop _head;
1139 objArrayOop _methods;
1140 typeArrayOop _bcis;
1141 int _index;
1142 bool _dirty;
1143 No_Safepoint_Verifier _nsv;
1145 public:
1147 enum {
1148 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1149 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1150 trace_next_offset = java_lang_Throwable::trace_next_offset,
1151 trace_size = java_lang_Throwable::trace_size,
1152 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1153 };
1155 // constructor for new backtrace
1156 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _dirty(false) {
1157 expand(CHECK);
1158 _backtrace = _head;
1159 _index = 0;
1160 }
1162 void flush() {
1163 // The following appears to have been an optimization to save from
1164 // doing a barrier for each individual store into the _methods array,
1165 // but rather to do it for the entire array after the series of writes.
1166 // That optimization seems to have been lost when compressed oops was
1167 // implemented. However, the extra card-marks below was left in place,
1168 // but is now redundant because the individual stores into the
1169 // _methods array already execute the barrier code. CR 6918185 has
1170 // been filed so the original code may be restored by deferring the
1171 // barriers until after the entire sequence of stores, thus re-enabling
1172 // the intent of the original optimization. In the meantime the redundant
1173 // card mark below is now disabled.
1174 if (_dirty && _methods != NULL) {
1175 #if 0
1176 BarrierSet* bs = Universe::heap()->barrier_set();
1177 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt");
1178 bs->write_ref_array((HeapWord*)_methods->base(), _methods->length());
1179 #endif
1180 _dirty = false;
1181 }
1182 }
1184 void expand(TRAPS) {
1185 flush();
1187 objArrayHandle old_head(THREAD, _head);
1188 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1190 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1191 objArrayHandle new_head(THREAD, head);
1193 objArrayOop methods = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1194 objArrayHandle new_methods(THREAD, methods);
1196 typeArrayOop bcis = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1197 typeArrayHandle new_bcis(THREAD, bcis);
1199 if (!old_head.is_null()) {
1200 old_head->obj_at_put(trace_next_offset, new_head());
1201 }
1202 new_head->obj_at_put(trace_methods_offset, new_methods());
1203 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1205 _head = new_head();
1206 _methods = new_methods();
1207 _bcis = new_bcis();
1208 _index = 0;
1209 }
1211 oop backtrace() {
1212 flush();
1213 return _backtrace();
1214 }
1216 inline void push(methodOop method, short bci, TRAPS) {
1217 if (_index >= trace_chunk_size) {
1218 methodHandle mhandle(THREAD, method);
1219 expand(CHECK);
1220 method = mhandle();
1221 }
1223 _methods->obj_at_put(_index, method);
1224 _bcis->ushort_at_put(_index, bci);
1225 _index++;
1226 _dirty = true;
1227 }
1229 methodOop current_method() {
1230 assert(_index >= 0 && _index < trace_chunk_size, "out of range");
1231 return methodOop(_methods->obj_at(_index));
1232 }
1234 jushort current_bci() {
1235 assert(_index >= 0 && _index < trace_chunk_size, "out of range");
1236 return _bcis->ushort_at(_index);
1237 }
1238 };
1241 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, TRAPS) {
1242 if (!StackTraceInThrowable) return;
1243 ResourceMark rm(THREAD);
1245 // Start out by clearing the backtrace for this object, in case the VM
1246 // runs out of memory while allocating the stack trace
1247 set_backtrace(throwable(), NULL);
1248 if (JDK_Version::is_gte_jdk14x_version()) {
1249 // New since 1.4, clear lazily constructed Java level stacktrace if
1250 // refilling occurs
1251 clear_stacktrace(throwable());
1252 }
1254 int max_depth = MaxJavaStackTraceDepth;
1255 JavaThread* thread = (JavaThread*)THREAD;
1256 BacktraceBuilder bt(CHECK);
1258 // Instead of using vframe directly, this version of fill_in_stack_trace
1259 // basically handles everything by hand. This significantly improved the
1260 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1261 // See bug 6333838 for more details.
1262 // The "ASSERT" here is to verify this method generates the exactly same stack
1263 // trace as utilizing vframe.
1264 #ifdef ASSERT
1265 vframeStream st(thread);
1266 methodHandle st_method(THREAD, st.method());
1267 #endif
1268 int total_count = 0;
1269 RegisterMap map(thread, false);
1270 int decode_offset = 0;
1271 nmethod* nm = NULL;
1272 bool skip_fillInStackTrace_check = false;
1273 bool skip_throwableInit_check = false;
1275 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1276 methodOop method = NULL;
1277 int bci = 0;
1279 // Compiled java method case.
1280 if (decode_offset != 0) {
1281 DebugInfoReadStream stream(nm, decode_offset);
1282 decode_offset = stream.read_int();
1283 method = (methodOop)nm->oop_at(stream.read_int());
1284 bci = stream.read_bci();
1285 } else {
1286 if (fr.is_first_frame()) break;
1287 address pc = fr.pc();
1288 if (fr.is_interpreted_frame()) {
1289 intptr_t bcx = fr.interpreter_frame_bcx();
1290 method = fr.interpreter_frame_method();
1291 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
1292 fr = fr.sender(&map);
1293 } else {
1294 CodeBlob* cb = fr.cb();
1295 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1296 // but non nmethod
1297 fr = fr.sender(&map);
1298 if (cb == NULL || !cb->is_nmethod()) {
1299 continue;
1300 }
1301 nm = (nmethod*)cb;
1302 if (nm->method()->is_native()) {
1303 method = nm->method();
1304 bci = 0;
1305 } else {
1306 PcDesc* pd = nm->pc_desc_at(pc);
1307 decode_offset = pd->scope_decode_offset();
1308 // if decode_offset is not equal to 0, it will execute the
1309 // "compiled java method case" at the beginning of the loop.
1310 continue;
1311 }
1312 }
1313 }
1314 #ifdef ASSERT
1315 assert(st_method() == method && st.bci() == bci,
1316 "Wrong stack trace");
1317 st.next();
1318 // vframeStream::method isn't GC-safe so store off a copy
1319 // of the methodOop in case we GC.
1320 if (!st.at_end()) {
1321 st_method = st.method();
1322 }
1323 #endif
1324 if (!skip_fillInStackTrace_check) {
1325 // check "fillInStackTrace" only once, so we negate the flag
1326 // after the first time check.
1327 skip_fillInStackTrace_check = true;
1328 if (method->name() == vmSymbols::fillInStackTrace_name()) {
1329 continue;
1330 }
1331 }
1332 // skip <init> methods of the exceptions klass. If there is <init> methods
1333 // that belongs to a superclass of the exception we are going to skipping
1334 // them in stack trace. This is simlar to classic VM.
1335 if (!skip_throwableInit_check) {
1336 if (method->name() == vmSymbols::object_initializer_name() &&
1337 throwable->is_a(method->method_holder())) {
1338 continue;
1339 } else {
1340 // if no "Throwable.init()" method found, we stop checking it next time.
1341 skip_throwableInit_check = true;
1342 }
1343 }
1344 bt.push(method, bci, CHECK);
1345 total_count++;
1346 }
1348 // Put completed stack trace into throwable object
1349 set_backtrace(throwable(), bt.backtrace());
1350 }
1352 void java_lang_Throwable::fill_in_stack_trace(Handle throwable) {
1353 // No-op if stack trace is disabled
1354 if (!StackTraceInThrowable) {
1355 return;
1356 }
1358 // Disable stack traces for some preallocated out of memory errors
1359 if (!Universe::should_fill_in_stack_trace(throwable)) {
1360 return;
1361 }
1363 PRESERVE_EXCEPTION_MARK;
1365 JavaThread* thread = JavaThread::active();
1366 fill_in_stack_trace(throwable, thread);
1367 // ignore exceptions thrown during stack trace filling
1368 CLEAR_PENDING_EXCEPTION;
1369 }
1371 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1372 // Allocate stack trace - backtrace is created but not filled in
1374 // No-op if stack trace is disabled
1375 if (!StackTraceInThrowable) return;
1377 objArrayOop h_oop = oopFactory::new_objectArray(trace_size, CHECK);
1378 objArrayHandle backtrace (THREAD, h_oop);
1379 objArrayOop m_oop = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1380 objArrayHandle methods (THREAD, m_oop);
1381 typeArrayOop b = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1382 typeArrayHandle bcis(THREAD, b);
1384 // backtrace has space for one chunk (next is NULL)
1385 backtrace->obj_at_put(trace_methods_offset, methods());
1386 backtrace->obj_at_put(trace_bcis_offset, bcis());
1387 set_backtrace(throwable(), backtrace());
1388 }
1391 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1392 // Fill in stack trace into preallocated backtrace (no GC)
1394 // No-op if stack trace is disabled
1395 if (!StackTraceInThrowable) return;
1397 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1399 oop backtrace = java_lang_Throwable::backtrace(throwable());
1400 assert(backtrace != NULL, "backtrace not preallocated");
1402 oop m = objArrayOop(backtrace)->obj_at(trace_methods_offset);
1403 objArrayOop methods = objArrayOop(m);
1404 assert(methods != NULL && methods->length() > 0, "method array not preallocated");
1406 oop b = objArrayOop(backtrace)->obj_at(trace_bcis_offset);
1407 typeArrayOop bcis = typeArrayOop(b);
1408 assert(bcis != NULL, "bci array not preallocated");
1410 assert(methods->length() == bcis->length(), "method and bci arrays should match");
1412 JavaThread* thread = JavaThread::current();
1413 ResourceMark rm(thread);
1414 vframeStream st(thread);
1416 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1417 // methods as preallocated errors aren't created by "java" code.
1419 // fill in as much stack trace as possible
1420 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1421 int chunk_count = 0;
1423 for (;!st.at_end(); st.next()) {
1424 // add element
1425 bcis->ushort_at_put(chunk_count, st.bci());
1426 methods->obj_at_put(chunk_count, st.method());
1428 chunk_count++;
1430 // Bail-out for deep stacks
1431 if (chunk_count >= max_chunks) break;
1432 }
1433 }
1436 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1437 if (throwable == NULL) {
1438 THROW_0(vmSymbols::java_lang_NullPointerException());
1439 }
1440 objArrayOop chunk = objArrayOop(backtrace(throwable));
1441 int depth = 0;
1442 if (chunk != NULL) {
1443 // Iterate over chunks and count full ones
1444 while (true) {
1445 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1446 if (next == NULL) break;
1447 depth += trace_chunk_size;
1448 chunk = next;
1449 }
1450 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1451 // Count element in remaining partial chunk
1452 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
1453 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1454 assert(methods != NULL && bcis != NULL, "sanity check");
1455 for (int i = 0; i < methods->length(); i++) {
1456 if (methods->obj_at(i) == NULL) break;
1457 depth++;
1458 }
1459 }
1460 return depth;
1461 }
1464 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1465 if (throwable == NULL) {
1466 THROW_0(vmSymbols::java_lang_NullPointerException());
1467 }
1468 if (index < 0) {
1469 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1470 }
1471 // Compute how many chunks to skip and index into actual chunk
1472 objArrayOop chunk = objArrayOop(backtrace(throwable));
1473 int skip_chunks = index / trace_chunk_size;
1474 int chunk_index = index % trace_chunk_size;
1475 while (chunk != NULL && skip_chunks > 0) {
1476 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1477 skip_chunks--;
1478 }
1479 if (chunk == NULL) {
1480 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1481 }
1482 // Get method,bci from chunk
1483 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
1484 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1485 assert(methods != NULL && bcis != NULL, "sanity check");
1486 methodHandle method(THREAD, methodOop(methods->obj_at(chunk_index)));
1487 int bci = bcis->ushort_at(chunk_index);
1488 // Chunk can be partial full
1489 if (method.is_null()) {
1490 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1491 }
1493 oop element = java_lang_StackTraceElement::create(method, bci, CHECK_0);
1494 return element;
1495 }
1497 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1498 // SystemDictionary::stackTraceElement_klass() will be null for pre-1.4 JDKs
1499 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1501 // Allocate java.lang.StackTraceElement instance
1502 klassOop k = SystemDictionary::StackTraceElement_klass();
1503 assert(k != NULL, "must be loaded in 1.4+");
1504 instanceKlassHandle ik (THREAD, k);
1505 if (ik->should_be_initialized()) {
1506 ik->initialize(CHECK_0);
1507 }
1509 Handle element = ik->allocate_instance_handle(CHECK_0);
1510 // Fill in class name
1511 ResourceMark rm(THREAD);
1512 const char* str = instanceKlass::cast(method->method_holder())->external_name();
1513 oop classname = StringTable::intern((char*) str, CHECK_0);
1514 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1515 // Fill in method name
1516 oop methodname = StringTable::intern(method->name(), CHECK_0);
1517 java_lang_StackTraceElement::set_methodName(element(), methodname);
1518 // Fill in source file name
1519 symbolOop source = instanceKlass::cast(method->method_holder())->source_file_name();
1520 oop filename = StringTable::intern(source, CHECK_0);
1521 java_lang_StackTraceElement::set_fileName(element(), filename);
1522 // File in source line number
1523 int line_number;
1524 if (method->is_native()) {
1525 // Negative value different from -1 below, enabling Java code in
1526 // class java.lang.StackTraceElement to distinguish "native" from
1527 // "no LineNumberTable".
1528 line_number = -2;
1529 } else {
1530 // Returns -1 if no LineNumberTable, and otherwise actual line number
1531 line_number = method->line_number_from_bci(bci);
1532 }
1533 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1535 return element();
1536 }
1539 void java_lang_reflect_AccessibleObject::compute_offsets() {
1540 klassOop k = SystemDictionary::reflect_AccessibleObject_klass();
1541 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1542 }
1544 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1545 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1546 return (jboolean) reflect->bool_field(override_offset);
1547 }
1549 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1550 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1551 reflect->bool_field_put(override_offset, (int) value);
1552 }
1554 void java_lang_reflect_Method::compute_offsets() {
1555 klassOop k = SystemDictionary::reflect_Method_klass();
1556 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1557 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1558 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1559 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1560 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1561 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1562 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1563 // The generic signature and annotations fields are only present in 1.5
1564 signature_offset = -1;
1565 annotations_offset = -1;
1566 parameter_annotations_offset = -1;
1567 annotation_default_offset = -1;
1568 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1569 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1570 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1571 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1572 }
1574 Handle java_lang_reflect_Method::create(TRAPS) {
1575 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1576 klassOop klass = SystemDictionary::reflect_Method_klass();
1577 // This class is eagerly initialized during VM initialization, since we keep a refence
1578 // to one of the methods
1579 assert(instanceKlass::cast(klass)->is_initialized(), "must be initialized");
1580 return instanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH);
1581 }
1583 oop java_lang_reflect_Method::clazz(oop reflect) {
1584 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1585 return reflect->obj_field(clazz_offset);
1586 }
1588 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1589 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1590 reflect->obj_field_put(clazz_offset, value);
1591 }
1593 int java_lang_reflect_Method::slot(oop reflect) {
1594 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1595 return reflect->int_field(slot_offset);
1596 }
1598 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1599 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1600 reflect->int_field_put(slot_offset, value);
1601 }
1603 oop java_lang_reflect_Method::name(oop method) {
1604 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1605 return method->obj_field(name_offset);
1606 }
1608 void java_lang_reflect_Method::set_name(oop method, oop value) {
1609 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1610 method->obj_field_put(name_offset, value);
1611 }
1613 oop java_lang_reflect_Method::return_type(oop method) {
1614 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1615 return method->obj_field(returnType_offset);
1616 }
1618 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
1619 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1620 method->obj_field_put(returnType_offset, value);
1621 }
1623 oop java_lang_reflect_Method::parameter_types(oop method) {
1624 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1625 return method->obj_field(parameterTypes_offset);
1626 }
1628 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
1629 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1630 method->obj_field_put(parameterTypes_offset, value);
1631 }
1633 oop java_lang_reflect_Method::exception_types(oop method) {
1634 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1635 return method->obj_field(exceptionTypes_offset);
1636 }
1638 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
1639 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1640 method->obj_field_put(exceptionTypes_offset, value);
1641 }
1643 int java_lang_reflect_Method::modifiers(oop method) {
1644 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1645 return method->int_field(modifiers_offset);
1646 }
1648 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
1649 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1650 method->int_field_put(modifiers_offset, value);
1651 }
1653 bool java_lang_reflect_Method::has_signature_field() {
1654 return (signature_offset >= 0);
1655 }
1657 oop java_lang_reflect_Method::signature(oop method) {
1658 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1659 assert(has_signature_field(), "signature field must be present");
1660 return method->obj_field(signature_offset);
1661 }
1663 void java_lang_reflect_Method::set_signature(oop method, oop value) {
1664 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1665 assert(has_signature_field(), "signature field must be present");
1666 method->obj_field_put(signature_offset, value);
1667 }
1669 bool java_lang_reflect_Method::has_annotations_field() {
1670 return (annotations_offset >= 0);
1671 }
1673 oop java_lang_reflect_Method::annotations(oop method) {
1674 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1675 assert(has_annotations_field(), "annotations field must be present");
1676 return method->obj_field(annotations_offset);
1677 }
1679 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
1680 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1681 assert(has_annotations_field(), "annotations field must be present");
1682 method->obj_field_put(annotations_offset, value);
1683 }
1685 bool java_lang_reflect_Method::has_parameter_annotations_field() {
1686 return (parameter_annotations_offset >= 0);
1687 }
1689 oop java_lang_reflect_Method::parameter_annotations(oop method) {
1690 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1691 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1692 return method->obj_field(parameter_annotations_offset);
1693 }
1695 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
1696 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1697 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1698 method->obj_field_put(parameter_annotations_offset, value);
1699 }
1701 bool java_lang_reflect_Method::has_annotation_default_field() {
1702 return (annotation_default_offset >= 0);
1703 }
1705 oop java_lang_reflect_Method::annotation_default(oop method) {
1706 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1707 assert(has_annotation_default_field(), "annotation default field must be present");
1708 return method->obj_field(annotation_default_offset);
1709 }
1711 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
1712 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1713 assert(has_annotation_default_field(), "annotation default field must be present");
1714 method->obj_field_put(annotation_default_offset, value);
1715 }
1717 void java_lang_reflect_Constructor::compute_offsets() {
1718 klassOop k = SystemDictionary::reflect_Constructor_klass();
1719 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1720 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1721 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1722 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1723 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1724 // The generic signature and annotations fields are only present in 1.5
1725 signature_offset = -1;
1726 annotations_offset = -1;
1727 parameter_annotations_offset = -1;
1728 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1729 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1730 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1731 }
1733 Handle java_lang_reflect_Constructor::create(TRAPS) {
1734 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1735 symbolHandle name = vmSymbolHandles::java_lang_reflect_Constructor();
1736 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
1737 instanceKlassHandle klass (THREAD, k);
1738 // Ensure it is initialized
1739 klass->initialize(CHECK_NH);
1740 return klass->allocate_instance_handle(CHECK_NH);
1741 }
1743 oop java_lang_reflect_Constructor::clazz(oop reflect) {
1744 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1745 return reflect->obj_field(clazz_offset);
1746 }
1748 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
1749 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1750 reflect->obj_field_put(clazz_offset, value);
1751 }
1753 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
1754 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1755 return constructor->obj_field(parameterTypes_offset);
1756 }
1758 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
1759 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1760 constructor->obj_field_put(parameterTypes_offset, value);
1761 }
1763 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
1764 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1765 return constructor->obj_field(exceptionTypes_offset);
1766 }
1768 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
1769 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1770 constructor->obj_field_put(exceptionTypes_offset, value);
1771 }
1773 int java_lang_reflect_Constructor::slot(oop reflect) {
1774 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1775 return reflect->int_field(slot_offset);
1776 }
1778 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
1779 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1780 reflect->int_field_put(slot_offset, value);
1781 }
1783 int java_lang_reflect_Constructor::modifiers(oop constructor) {
1784 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1785 return constructor->int_field(modifiers_offset);
1786 }
1788 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
1789 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1790 constructor->int_field_put(modifiers_offset, value);
1791 }
1793 bool java_lang_reflect_Constructor::has_signature_field() {
1794 return (signature_offset >= 0);
1795 }
1797 oop java_lang_reflect_Constructor::signature(oop constructor) {
1798 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1799 assert(has_signature_field(), "signature field must be present");
1800 return constructor->obj_field(signature_offset);
1801 }
1803 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
1804 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1805 assert(has_signature_field(), "signature field must be present");
1806 constructor->obj_field_put(signature_offset, value);
1807 }
1809 bool java_lang_reflect_Constructor::has_annotations_field() {
1810 return (annotations_offset >= 0);
1811 }
1813 oop java_lang_reflect_Constructor::annotations(oop constructor) {
1814 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1815 assert(has_annotations_field(), "annotations field must be present");
1816 return constructor->obj_field(annotations_offset);
1817 }
1819 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
1820 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1821 assert(has_annotations_field(), "annotations field must be present");
1822 constructor->obj_field_put(annotations_offset, value);
1823 }
1825 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
1826 return (parameter_annotations_offset >= 0);
1827 }
1829 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
1830 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1831 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1832 return method->obj_field(parameter_annotations_offset);
1833 }
1835 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
1836 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1837 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1838 method->obj_field_put(parameter_annotations_offset, value);
1839 }
1841 void java_lang_reflect_Field::compute_offsets() {
1842 klassOop k = SystemDictionary::reflect_Field_klass();
1843 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1844 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1845 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
1846 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1847 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1848 // The generic signature and annotations fields are only present in 1.5
1849 signature_offset = -1;
1850 annotations_offset = -1;
1851 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1852 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1853 }
1855 Handle java_lang_reflect_Field::create(TRAPS) {
1856 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1857 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field();
1858 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
1859 instanceKlassHandle klass (THREAD, k);
1860 // Ensure it is initialized
1861 klass->initialize(CHECK_NH);
1862 return klass->allocate_instance_handle(CHECK_NH);
1863 }
1865 oop java_lang_reflect_Field::clazz(oop reflect) {
1866 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1867 return reflect->obj_field(clazz_offset);
1868 }
1870 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
1871 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1872 reflect->obj_field_put(clazz_offset, value);
1873 }
1875 oop java_lang_reflect_Field::name(oop field) {
1876 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1877 return field->obj_field(name_offset);
1878 }
1880 void java_lang_reflect_Field::set_name(oop field, oop value) {
1881 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1882 field->obj_field_put(name_offset, value);
1883 }
1885 oop java_lang_reflect_Field::type(oop field) {
1886 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1887 return field->obj_field(type_offset);
1888 }
1890 void java_lang_reflect_Field::set_type(oop field, oop value) {
1891 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1892 field->obj_field_put(type_offset, value);
1893 }
1895 int java_lang_reflect_Field::slot(oop reflect) {
1896 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1897 return reflect->int_field(slot_offset);
1898 }
1900 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
1901 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1902 reflect->int_field_put(slot_offset, value);
1903 }
1905 int java_lang_reflect_Field::modifiers(oop field) {
1906 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1907 return field->int_field(modifiers_offset);
1908 }
1910 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
1911 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1912 field->int_field_put(modifiers_offset, value);
1913 }
1915 bool java_lang_reflect_Field::has_signature_field() {
1916 return (signature_offset >= 0);
1917 }
1919 oop java_lang_reflect_Field::signature(oop field) {
1920 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1921 assert(has_signature_field(), "signature field must be present");
1922 return field->obj_field(signature_offset);
1923 }
1925 void java_lang_reflect_Field::set_signature(oop field, oop value) {
1926 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1927 assert(has_signature_field(), "signature field must be present");
1928 field->obj_field_put(signature_offset, value);
1929 }
1931 bool java_lang_reflect_Field::has_annotations_field() {
1932 return (annotations_offset >= 0);
1933 }
1935 oop java_lang_reflect_Field::annotations(oop field) {
1936 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1937 assert(has_annotations_field(), "annotations field must be present");
1938 return field->obj_field(annotations_offset);
1939 }
1941 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
1942 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1943 assert(has_annotations_field(), "annotations field must be present");
1944 field->obj_field_put(annotations_offset, value);
1945 }
1948 void sun_reflect_ConstantPool::compute_offsets() {
1949 klassOop k = SystemDictionary::reflect_ConstantPool_klass();
1950 // This null test can be removed post beta
1951 if (k != NULL) {
1952 compute_offset(_cp_oop_offset, k, vmSymbols::constantPoolOop_name(), vmSymbols::object_signature());
1953 }
1954 }
1957 Handle sun_reflect_ConstantPool::create(TRAPS) {
1958 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1959 klassOop k = SystemDictionary::reflect_ConstantPool_klass();
1960 instanceKlassHandle klass (THREAD, k);
1961 // Ensure it is initialized
1962 klass->initialize(CHECK_NH);
1963 return klass->allocate_instance_handle(CHECK_NH);
1964 }
1967 oop sun_reflect_ConstantPool::cp_oop(oop reflect) {
1968 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1969 return reflect->obj_field(_cp_oop_offset);
1970 }
1973 void sun_reflect_ConstantPool::set_cp_oop(oop reflect, oop value) {
1974 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1975 reflect->obj_field_put(_cp_oop_offset, value);
1976 }
1978 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
1979 klassOop k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
1980 // This null test can be removed post beta
1981 if (k != NULL) {
1982 compute_offset(_base_offset, k,
1983 vmSymbols::base_name(), vmSymbols::object_signature());
1984 }
1985 }
1987 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
1988 klassOop k = SystemDictionary::box_klass(type);
1989 if (k == NULL) return NULL;
1990 instanceKlassHandle h (THREAD, k);
1991 if (!h->is_initialized()) h->initialize(CHECK_0);
1992 return h->allocate_instance(THREAD);
1993 }
1996 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
1997 oop box = initialize_and_allocate(type, CHECK_0);
1998 if (box == NULL) return NULL;
1999 switch (type) {
2000 case T_BOOLEAN:
2001 box->bool_field_put(value_offset, value->z);
2002 break;
2003 case T_CHAR:
2004 box->char_field_put(value_offset, value->c);
2005 break;
2006 case T_FLOAT:
2007 box->float_field_put(value_offset, value->f);
2008 break;
2009 case T_DOUBLE:
2010 box->double_field_put(long_value_offset, value->d);
2011 break;
2012 case T_BYTE:
2013 box->byte_field_put(value_offset, value->b);
2014 break;
2015 case T_SHORT:
2016 box->short_field_put(value_offset, value->s);
2017 break;
2018 case T_INT:
2019 box->int_field_put(value_offset, value->i);
2020 break;
2021 case T_LONG:
2022 box->long_field_put(long_value_offset, value->j);
2023 break;
2024 default:
2025 return NULL;
2026 }
2027 return box;
2028 }
2031 BasicType java_lang_boxing_object::basic_type(oop box) {
2032 if (box == NULL) return T_ILLEGAL;
2033 BasicType type = SystemDictionary::box_klass_type(box->klass());
2034 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2035 return T_ILLEGAL;
2036 return type;
2037 }
2040 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2041 BasicType type = SystemDictionary::box_klass_type(box->klass());
2042 switch (type) {
2043 case T_BOOLEAN:
2044 value->z = box->bool_field(value_offset);
2045 break;
2046 case T_CHAR:
2047 value->c = box->char_field(value_offset);
2048 break;
2049 case T_FLOAT:
2050 value->f = box->float_field(value_offset);
2051 break;
2052 case T_DOUBLE:
2053 value->d = box->double_field(long_value_offset);
2054 break;
2055 case T_BYTE:
2056 value->b = box->byte_field(value_offset);
2057 break;
2058 case T_SHORT:
2059 value->s = box->short_field(value_offset);
2060 break;
2061 case T_INT:
2062 value->i = box->int_field(value_offset);
2063 break;
2064 case T_LONG:
2065 value->j = box->long_field(long_value_offset);
2066 break;
2067 default:
2068 return T_ILLEGAL;
2069 } // end switch
2070 return type;
2071 }
2074 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2075 BasicType type = SystemDictionary::box_klass_type(box->klass());
2076 switch (type) {
2077 case T_BOOLEAN:
2078 box->bool_field_put(value_offset, value->z);
2079 break;
2080 case T_CHAR:
2081 box->char_field_put(value_offset, value->c);
2082 break;
2083 case T_FLOAT:
2084 box->float_field_put(value_offset, value->f);
2085 break;
2086 case T_DOUBLE:
2087 box->double_field_put(long_value_offset, value->d);
2088 break;
2089 case T_BYTE:
2090 box->byte_field_put(value_offset, value->b);
2091 break;
2092 case T_SHORT:
2093 box->short_field_put(value_offset, value->s);
2094 break;
2095 case T_INT:
2096 box->int_field_put(value_offset, value->i);
2097 break;
2098 case T_LONG:
2099 box->long_field_put(long_value_offset, value->j);
2100 break;
2101 default:
2102 return T_ILLEGAL;
2103 } // end switch
2104 return type;
2105 }
2108 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2109 switch (type) {
2110 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2111 case T_CHAR: st->print("%d", value->c); break;
2112 case T_BYTE: st->print("%d", value->b); break;
2113 case T_SHORT: st->print("%d", value->s); break;
2114 case T_INT: st->print("%d", value->i); break;
2115 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2116 case T_FLOAT: st->print("%f", value->f); break;
2117 case T_DOUBLE: st->print("%lf", value->d); break;
2118 default: st->print("type %d?", type); break;
2119 }
2120 }
2123 // Support for java_lang_ref_Reference
2124 oop java_lang_ref_Reference::pending_list_lock() {
2125 instanceKlass* ik = instanceKlass::cast(SystemDictionary::Reference_klass());
2126 char *addr = (((char *)ik->start_of_static_fields()) + static_lock_offset);
2127 if (UseCompressedOops) {
2128 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2129 } else {
2130 return oopDesc::load_decode_heap_oop((oop*)addr);
2131 }
2132 }
2134 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2135 instanceKlass* ik = instanceKlass::cast(SystemDictionary::Reference_klass());
2136 char *addr = (((char *)ik->start_of_static_fields()) + static_pending_offset);
2137 // XXX This might not be HeapWord aligned, almost rather be char *.
2138 return (HeapWord*)addr;
2139 }
2141 oop java_lang_ref_Reference::pending_list() {
2142 char *addr = (char *)pending_list_addr();
2143 if (UseCompressedOops) {
2144 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2145 } else {
2146 return oopDesc::load_decode_heap_oop((oop*)addr);
2147 }
2148 }
2151 // Support for java_lang_ref_SoftReference
2153 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2154 return ref->long_field(timestamp_offset);
2155 }
2157 jlong java_lang_ref_SoftReference::clock() {
2158 instanceKlass* ik = instanceKlass::cast(SystemDictionary::SoftReference_klass());
2159 int offset = ik->offset_of_static_fields() + static_clock_offset;
2161 return SystemDictionary::SoftReference_klass()->long_field(offset);
2162 }
2164 void java_lang_ref_SoftReference::set_clock(jlong value) {
2165 instanceKlass* ik = instanceKlass::cast(SystemDictionary::SoftReference_klass());
2166 int offset = ik->offset_of_static_fields() + static_clock_offset;
2168 SystemDictionary::SoftReference_klass()->long_field_put(offset, value);
2169 }
2172 // Support for java_dyn_MethodHandle
2174 int java_dyn_MethodHandle::_type_offset;
2175 int java_dyn_MethodHandle::_vmtarget_offset;
2176 int java_dyn_MethodHandle::_vmentry_offset;
2177 int java_dyn_MethodHandle::_vmslots_offset;
2179 int sun_dyn_MemberName::_clazz_offset;
2180 int sun_dyn_MemberName::_name_offset;
2181 int sun_dyn_MemberName::_type_offset;
2182 int sun_dyn_MemberName::_flags_offset;
2183 int sun_dyn_MemberName::_vmtarget_offset;
2184 int sun_dyn_MemberName::_vmindex_offset;
2186 int sun_dyn_DirectMethodHandle::_vmindex_offset;
2188 int sun_dyn_BoundMethodHandle::_argument_offset;
2189 int sun_dyn_BoundMethodHandle::_vmargslot_offset;
2191 int sun_dyn_AdapterMethodHandle::_conversion_offset;
2193 void java_dyn_MethodHandle::compute_offsets() {
2194 klassOop k = SystemDictionary::MethodHandle_klass();
2195 if (k != NULL && EnableMethodHandles) {
2196 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::java_dyn_MethodType_signature(), true);
2197 compute_offset(_vmtarget_offset, k, vmSymbols::vmtarget_name(), vmSymbols::object_signature(), true);
2198 compute_offset(_vmentry_offset, k, vmSymbols::vmentry_name(), vmSymbols::machine_word_signature(), true);
2200 // Note: MH.vmslots (if it is present) is a hoisted copy of MH.type.form.vmslots.
2201 // It is optional pending experiments to keep or toss.
2202 compute_optional_offset(_vmslots_offset, k, vmSymbols::vmslots_name(), vmSymbols::int_signature(), true);
2203 }
2204 }
2206 void sun_dyn_MemberName::compute_offsets() {
2207 klassOop k = SystemDictionary::MemberName_klass();
2208 if (k != NULL && EnableMethodHandles) {
2209 compute_offset(_clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2210 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2211 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::object_signature());
2212 compute_offset(_flags_offset, k, vmSymbols::flags_name(), vmSymbols::int_signature());
2213 compute_offset(_vmtarget_offset, k, vmSymbols::vmtarget_name(), vmSymbols::object_signature());
2214 compute_offset(_vmindex_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature());
2215 }
2216 }
2218 void sun_dyn_DirectMethodHandle::compute_offsets() {
2219 klassOop k = SystemDictionary::DirectMethodHandle_klass();
2220 if (k != NULL && EnableMethodHandles) {
2221 compute_offset(_vmindex_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature(), true);
2222 }
2223 }
2225 void sun_dyn_BoundMethodHandle::compute_offsets() {
2226 klassOop k = SystemDictionary::BoundMethodHandle_klass();
2227 if (k != NULL && EnableMethodHandles) {
2228 compute_offset(_vmargslot_offset, k, vmSymbols::vmargslot_name(), vmSymbols::int_signature(), true);
2229 compute_offset(_argument_offset, k, vmSymbols::argument_name(), vmSymbols::object_signature(), true);
2230 }
2231 }
2233 void sun_dyn_AdapterMethodHandle::compute_offsets() {
2234 klassOop k = SystemDictionary::AdapterMethodHandle_klass();
2235 if (k != NULL && EnableMethodHandles) {
2236 compute_offset(_conversion_offset, k, vmSymbols::conversion_name(), vmSymbols::int_signature(), true);
2237 }
2238 }
2240 oop java_dyn_MethodHandle::type(oop mh) {
2241 return mh->obj_field(_type_offset);
2242 }
2244 void java_dyn_MethodHandle::set_type(oop mh, oop mtype) {
2245 mh->obj_field_put(_type_offset, mtype);
2246 }
2248 int java_dyn_MethodHandle::vmslots(oop mh) {
2249 int vmslots_offset = _vmslots_offset;
2250 if (vmslots_offset != 0) {
2251 #ifdef ASSERT
2252 int x = mh->int_field(vmslots_offset);
2253 int y = compute_vmslots(mh);
2254 assert(x == y, "correct hoisted value");
2255 #endif
2256 return mh->int_field(vmslots_offset);
2257 } else {
2258 return compute_vmslots(mh);
2259 }
2260 }
2262 // if MH.vmslots exists, hoist into it the value of type.form.vmslots
2263 void java_dyn_MethodHandle::init_vmslots(oop mh) {
2264 int vmslots_offset = _vmslots_offset;
2265 if (vmslots_offset != 0) {
2266 mh->int_field_put(vmslots_offset, compute_vmslots(mh));
2267 }
2268 }
2270 // fetch type.form.vmslots, which is the number of JVM stack slots
2271 // required to carry the arguments of this MH
2272 int java_dyn_MethodHandle::compute_vmslots(oop mh) {
2273 oop mtype = type(mh);
2274 if (mtype == NULL) return 0; // Java code would get NPE
2275 oop form = java_dyn_MethodType::form(mtype);
2276 if (form == NULL) return 0; // Java code would get NPE
2277 return java_dyn_MethodTypeForm::vmslots(form);
2278 }
2280 // fetch the low-level entry point for this mh
2281 MethodHandleEntry* java_dyn_MethodHandle::vmentry(oop mh) {
2282 return (MethodHandleEntry*) mh->address_field(_vmentry_offset);
2283 }
2285 void java_dyn_MethodHandle::set_vmentry(oop mh, MethodHandleEntry* me) {
2286 assert(_vmentry_offset != 0, "must be present");
2288 // This is always the final step that initializes a valid method handle:
2289 mh->release_address_field_put(_vmentry_offset, (address) me);
2291 // There should be enough memory barriers on exit from native methods
2292 // to ensure that the MH is fully initialized to all threads before
2293 // Java code can publish it in global data structures.
2294 // But just in case, we use release_address_field_put.
2295 }
2297 /// MemberName accessors
2299 oop sun_dyn_MemberName::clazz(oop mname) {
2300 assert(is_instance(mname), "wrong type");
2301 return mname->obj_field(_clazz_offset);
2302 }
2304 void sun_dyn_MemberName::set_clazz(oop mname, oop clazz) {
2305 assert(is_instance(mname), "wrong type");
2306 mname->obj_field_put(_clazz_offset, clazz);
2307 }
2309 oop sun_dyn_MemberName::name(oop mname) {
2310 assert(is_instance(mname), "wrong type");
2311 return mname->obj_field(_name_offset);
2312 }
2314 void sun_dyn_MemberName::set_name(oop mname, oop name) {
2315 assert(is_instance(mname), "wrong type");
2316 mname->obj_field_put(_name_offset, name);
2317 }
2319 oop sun_dyn_MemberName::type(oop mname) {
2320 assert(is_instance(mname), "wrong type");
2321 return mname->obj_field(_type_offset);
2322 }
2324 void sun_dyn_MemberName::set_type(oop mname, oop type) {
2325 assert(is_instance(mname), "wrong type");
2326 mname->obj_field_put(_type_offset, type);
2327 }
2329 int sun_dyn_MemberName::flags(oop mname) {
2330 assert(is_instance(mname), "wrong type");
2331 return mname->int_field(_flags_offset);
2332 }
2334 void sun_dyn_MemberName::set_flags(oop mname, int flags) {
2335 assert(is_instance(mname), "wrong type");
2336 mname->int_field_put(_flags_offset, flags);
2337 }
2339 oop sun_dyn_MemberName::vmtarget(oop mname) {
2340 assert(is_instance(mname), "wrong type");
2341 return mname->obj_field(_vmtarget_offset);
2342 }
2344 void sun_dyn_MemberName::set_vmtarget(oop mname, oop ref) {
2345 assert(is_instance(mname), "wrong type");
2346 mname->obj_field_put(_vmtarget_offset, ref);
2347 }
2349 int sun_dyn_MemberName::vmindex(oop mname) {
2350 assert(is_instance(mname), "wrong type");
2351 return mname->int_field(_vmindex_offset);
2352 }
2354 void sun_dyn_MemberName::set_vmindex(oop mname, int index) {
2355 assert(is_instance(mname), "wrong type");
2356 mname->int_field_put(_vmindex_offset, index);
2357 }
2359 oop java_dyn_MethodHandle::vmtarget(oop mh) {
2360 assert(is_instance(mh), "MH only");
2361 return mh->obj_field(_vmtarget_offset);
2362 }
2364 void java_dyn_MethodHandle::set_vmtarget(oop mh, oop ref) {
2365 assert(is_instance(mh), "MH only");
2366 mh->obj_field_put(_vmtarget_offset, ref);
2367 }
2369 int sun_dyn_DirectMethodHandle::vmindex(oop mh) {
2370 assert(is_instance(mh), "DMH only");
2371 return mh->int_field(_vmindex_offset);
2372 }
2374 void sun_dyn_DirectMethodHandle::set_vmindex(oop mh, int index) {
2375 assert(is_instance(mh), "DMH only");
2376 mh->int_field_put(_vmindex_offset, index);
2377 }
2379 int sun_dyn_BoundMethodHandle::vmargslot(oop mh) {
2380 assert(is_instance(mh), "BMH only");
2381 return mh->int_field(_vmargslot_offset);
2382 }
2384 oop sun_dyn_BoundMethodHandle::argument(oop mh) {
2385 assert(is_instance(mh), "BMH only");
2386 return mh->obj_field(_argument_offset);
2387 }
2389 int sun_dyn_AdapterMethodHandle::conversion(oop mh) {
2390 assert(is_instance(mh), "AMH only");
2391 return mh->int_field(_conversion_offset);
2392 }
2394 void sun_dyn_AdapterMethodHandle::set_conversion(oop mh, int conv) {
2395 assert(is_instance(mh), "AMH only");
2396 mh->int_field_put(_conversion_offset, conv);
2397 }
2400 // Support for java_dyn_MethodType
2402 int java_dyn_MethodType::_rtype_offset;
2403 int java_dyn_MethodType::_ptypes_offset;
2404 int java_dyn_MethodType::_form_offset;
2406 void java_dyn_MethodType::compute_offsets() {
2407 klassOop k = SystemDictionary::MethodType_klass();
2408 if (k != NULL) {
2409 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2410 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2411 compute_offset(_form_offset, k, vmSymbols::form_name(), vmSymbols::java_dyn_MethodTypeForm_signature());
2412 }
2413 }
2415 void java_dyn_MethodType::print_signature(oop mt, outputStream* st) {
2416 st->print("(");
2417 objArrayOop pts = ptypes(mt);
2418 for (int i = 0, limit = pts->length(); i < limit; i++) {
2419 java_lang_Class::print_signature(pts->obj_at(i), st);
2420 }
2421 st->print(")");
2422 java_lang_Class::print_signature(rtype(mt), st);
2423 }
2425 symbolOop java_dyn_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2426 ResourceMark rm;
2427 stringStream buffer(128);
2428 print_signature(mt, &buffer);
2429 const char* sigstr = buffer.base();
2430 int siglen = (int) buffer.size();
2431 if (!intern_if_not_found)
2432 return SymbolTable::probe(sigstr, siglen);
2433 else
2434 return oopFactory::new_symbol(sigstr, siglen, THREAD);
2435 }
2437 oop java_dyn_MethodType::rtype(oop mt) {
2438 assert(is_instance(mt), "must be a MethodType");
2439 return mt->obj_field(_rtype_offset);
2440 }
2442 objArrayOop java_dyn_MethodType::ptypes(oop mt) {
2443 assert(is_instance(mt), "must be a MethodType");
2444 return (objArrayOop) mt->obj_field(_ptypes_offset);
2445 }
2447 oop java_dyn_MethodType::form(oop mt) {
2448 assert(is_instance(mt), "must be a MethodType");
2449 return mt->obj_field(_form_offset);
2450 }
2452 oop java_dyn_MethodType::ptype(oop mt, int idx) {
2453 return ptypes(mt)->obj_at(idx);
2454 }
2456 int java_dyn_MethodType::ptype_count(oop mt) {
2457 return ptypes(mt)->length();
2458 }
2462 // Support for java_dyn_MethodTypeForm
2464 int java_dyn_MethodTypeForm::_vmslots_offset;
2465 int java_dyn_MethodTypeForm::_erasedType_offset;
2466 int java_dyn_MethodTypeForm::_genericInvoker_offset;
2468 void java_dyn_MethodTypeForm::compute_offsets() {
2469 klassOop k = SystemDictionary::MethodTypeForm_klass();
2470 if (k != NULL) {
2471 compute_optional_offset(_vmslots_offset, k, vmSymbols::vmslots_name(), vmSymbols::int_signature(), true);
2472 compute_optional_offset(_erasedType_offset, k, vmSymbols::erasedType_name(), vmSymbols::java_dyn_MethodType_signature(), true);
2473 compute_optional_offset(_genericInvoker_offset, k, vmSymbols::genericInvoker_name(), vmSymbols::java_dyn_MethodHandle_signature(), true);
2474 if (_genericInvoker_offset == 0) _genericInvoker_offset = -1; // set to explicit "empty" value
2475 }
2476 }
2478 int java_dyn_MethodTypeForm::vmslots(oop mtform) {
2479 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only");
2480 return mtform->int_field(_vmslots_offset);
2481 }
2483 oop java_dyn_MethodTypeForm::erasedType(oop mtform) {
2484 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only");
2485 return mtform->obj_field(_erasedType_offset);
2486 }
2488 oop java_dyn_MethodTypeForm::genericInvoker(oop mtform) {
2489 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only");
2490 return mtform->obj_field(_genericInvoker_offset);
2491 }
2494 // Support for java_dyn_CallSite
2496 int java_dyn_CallSite::_target_offset;
2497 int java_dyn_CallSite::_caller_method_offset;
2498 int java_dyn_CallSite::_caller_bci_offset;
2500 void java_dyn_CallSite::compute_offsets() {
2501 if (!EnableInvokeDynamic) return;
2502 klassOop k = SystemDictionary::CallSite_klass();
2503 if (k != NULL) {
2504 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_dyn_MethodHandle_signature());
2505 compute_offset(_caller_method_offset, k, vmSymbols::vmmethod_name(), vmSymbols::sun_dyn_MemberName_signature());
2506 compute_offset(_caller_bci_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature());
2507 }
2508 }
2510 oop java_dyn_CallSite::target(oop site) {
2511 return site->obj_field(_target_offset);
2512 }
2514 void java_dyn_CallSite::set_target(oop site, oop target) {
2515 site->obj_field_put(_target_offset, target);
2516 }
2518 oop java_dyn_CallSite::caller_method(oop site) {
2519 return site->obj_field(_caller_method_offset);
2520 }
2522 void java_dyn_CallSite::set_caller_method(oop site, oop ref) {
2523 site->obj_field_put(_caller_method_offset, ref);
2524 }
2526 jint java_dyn_CallSite::caller_bci(oop site) {
2527 return site->int_field(_caller_bci_offset);
2528 }
2530 void java_dyn_CallSite::set_caller_bci(oop site, jint bci) {
2531 site->int_field_put(_caller_bci_offset, bci);
2532 }
2535 // Support for java_security_AccessControlContext
2537 int java_security_AccessControlContext::_context_offset = 0;
2538 int java_security_AccessControlContext::_privilegedContext_offset = 0;
2539 int java_security_AccessControlContext::_isPrivileged_offset = 0;
2541 void java_security_AccessControlContext::compute_offsets() {
2542 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
2543 fieldDescriptor fd;
2544 instanceKlass* ik = instanceKlass::cast(SystemDictionary::AccessControlContext_klass());
2546 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
2547 fatal("Invalid layout of java.security.AccessControlContext");
2548 }
2549 _context_offset = fd.offset();
2551 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
2552 fatal("Invalid layout of java.security.AccessControlContext");
2553 }
2554 _privilegedContext_offset = fd.offset();
2556 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
2557 fatal("Invalid layout of java.security.AccessControlContext");
2558 }
2559 _isPrivileged_offset = fd.offset();
2560 }
2563 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
2564 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
2565 // Ensure klass is initialized
2566 instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
2567 // Allocate result
2568 oop result = instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
2569 // Fill in values
2570 result->obj_field_put(_context_offset, context());
2571 result->obj_field_put(_privilegedContext_offset, privileged_context());
2572 result->bool_field_put(_isPrivileged_offset, isPrivileged);
2573 return result;
2574 }
2577 // Support for java_lang_ClassLoader
2579 oop java_lang_ClassLoader::parent(oop loader) {
2580 assert(loader->is_oop(), "loader must be oop");
2581 return loader->obj_field(parent_offset);
2582 }
2585 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
2586 // Fix for 4474172; see evaluation for more details
2587 loader = non_reflection_class_loader(loader);
2589 oop cl = SystemDictionary::java_system_loader();
2590 while(cl != NULL) {
2591 if (cl == loader) return true;
2592 cl = parent(cl);
2593 }
2594 return false;
2595 }
2597 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
2598 if (loader != NULL) {
2599 // See whether this is one of the class loaders associated with
2600 // the generated bytecodes for reflection, and if so, "magically"
2601 // delegate to its parent to prevent class loading from occurring
2602 // in places where applications using reflection didn't expect it.
2603 klassOop delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
2604 // This might be null in non-1.4 JDKs
2605 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
2606 return parent(loader);
2607 }
2608 }
2609 return loader;
2610 }
2613 // Support for java_lang_System
2615 void java_lang_System::compute_offsets() {
2616 assert(offset_of_static_fields == 0, "offsets should be initialized only once");
2618 instanceKlass* ik = instanceKlass::cast(SystemDictionary::System_klass());
2619 offset_of_static_fields = ik->offset_of_static_fields();
2620 }
2622 int java_lang_System::in_offset_in_bytes() {
2623 return (offset_of_static_fields + static_in_offset);
2624 }
2627 int java_lang_System::out_offset_in_bytes() {
2628 return (offset_of_static_fields + static_out_offset);
2629 }
2632 int java_lang_System::err_offset_in_bytes() {
2633 return (offset_of_static_fields + static_err_offset);
2634 }
2638 int java_lang_String::value_offset;
2639 int java_lang_String::offset_offset;
2640 int java_lang_String::count_offset;
2641 int java_lang_String::hash_offset;
2642 int java_lang_Class::klass_offset;
2643 int java_lang_Class::array_klass_offset;
2644 int java_lang_Class::resolved_constructor_offset;
2645 int java_lang_Class::number_of_fake_oop_fields;
2646 int java_lang_Throwable::backtrace_offset;
2647 int java_lang_Throwable::detailMessage_offset;
2648 int java_lang_Throwable::cause_offset;
2649 int java_lang_Throwable::stackTrace_offset;
2650 int java_lang_reflect_AccessibleObject::override_offset;
2651 int java_lang_reflect_Method::clazz_offset;
2652 int java_lang_reflect_Method::name_offset;
2653 int java_lang_reflect_Method::returnType_offset;
2654 int java_lang_reflect_Method::parameterTypes_offset;
2655 int java_lang_reflect_Method::exceptionTypes_offset;
2656 int java_lang_reflect_Method::slot_offset;
2657 int java_lang_reflect_Method::modifiers_offset;
2658 int java_lang_reflect_Method::signature_offset;
2659 int java_lang_reflect_Method::annotations_offset;
2660 int java_lang_reflect_Method::parameter_annotations_offset;
2661 int java_lang_reflect_Method::annotation_default_offset;
2662 int java_lang_reflect_Constructor::clazz_offset;
2663 int java_lang_reflect_Constructor::parameterTypes_offset;
2664 int java_lang_reflect_Constructor::exceptionTypes_offset;
2665 int java_lang_reflect_Constructor::slot_offset;
2666 int java_lang_reflect_Constructor::modifiers_offset;
2667 int java_lang_reflect_Constructor::signature_offset;
2668 int java_lang_reflect_Constructor::annotations_offset;
2669 int java_lang_reflect_Constructor::parameter_annotations_offset;
2670 int java_lang_reflect_Field::clazz_offset;
2671 int java_lang_reflect_Field::name_offset;
2672 int java_lang_reflect_Field::type_offset;
2673 int java_lang_reflect_Field::slot_offset;
2674 int java_lang_reflect_Field::modifiers_offset;
2675 int java_lang_reflect_Field::signature_offset;
2676 int java_lang_reflect_Field::annotations_offset;
2677 int java_lang_boxing_object::value_offset;
2678 int java_lang_boxing_object::long_value_offset;
2679 int java_lang_ref_Reference::referent_offset;
2680 int java_lang_ref_Reference::queue_offset;
2681 int java_lang_ref_Reference::next_offset;
2682 int java_lang_ref_Reference::discovered_offset;
2683 int java_lang_ref_Reference::static_lock_offset;
2684 int java_lang_ref_Reference::static_pending_offset;
2685 int java_lang_ref_Reference::number_of_fake_oop_fields;
2686 int java_lang_ref_SoftReference::timestamp_offset;
2687 int java_lang_ref_SoftReference::static_clock_offset;
2688 int java_lang_ClassLoader::parent_offset;
2689 int java_lang_System::offset_of_static_fields;
2690 int java_lang_System::static_in_offset;
2691 int java_lang_System::static_out_offset;
2692 int java_lang_System::static_err_offset;
2693 int java_lang_StackTraceElement::declaringClass_offset;
2694 int java_lang_StackTraceElement::methodName_offset;
2695 int java_lang_StackTraceElement::fileName_offset;
2696 int java_lang_StackTraceElement::lineNumber_offset;
2697 int java_lang_AssertionStatusDirectives::classes_offset;
2698 int java_lang_AssertionStatusDirectives::classEnabled_offset;
2699 int java_lang_AssertionStatusDirectives::packages_offset;
2700 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
2701 int java_lang_AssertionStatusDirectives::deflt_offset;
2702 int java_nio_Buffer::_limit_offset;
2703 int sun_misc_AtomicLongCSImpl::_value_offset;
2704 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
2705 int sun_reflect_ConstantPool::_cp_oop_offset;
2706 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
2709 // Support for java_lang_StackTraceElement
2711 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
2712 element->obj_field_put(fileName_offset, value);
2713 }
2715 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
2716 element->obj_field_put(declaringClass_offset, value);
2717 }
2719 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
2720 element->obj_field_put(methodName_offset, value);
2721 }
2723 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
2724 element->int_field_put(lineNumber_offset, value);
2725 }
2728 // Support for java Assertions - java_lang_AssertionStatusDirectives.
2730 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
2731 o->obj_field_put(classes_offset, val);
2732 }
2734 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
2735 o->obj_field_put(classEnabled_offset, val);
2736 }
2738 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
2739 o->obj_field_put(packages_offset, val);
2740 }
2742 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
2743 o->obj_field_put(packageEnabled_offset, val);
2744 }
2746 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
2747 o->bool_field_put(deflt_offset, val);
2748 }
2751 // Support for intrinsification of java.nio.Buffer.checkIndex
2752 int java_nio_Buffer::limit_offset() {
2753 return _limit_offset;
2754 }
2757 void java_nio_Buffer::compute_offsets() {
2758 klassOop k = SystemDictionary::java_nio_Buffer_klass();
2759 assert(k != NULL, "must be loaded in 1.4+");
2760 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
2761 }
2763 // Support for intrinsification of sun.misc.AtomicLongCSImpl.attemptUpdate
2764 int sun_misc_AtomicLongCSImpl::value_offset() {
2765 assert(SystemDictionary::sun_misc_AtomicLongCSImpl_klass() != NULL, "can't call this");
2766 return _value_offset;
2767 }
2770 void sun_misc_AtomicLongCSImpl::compute_offsets() {
2771 klassOop k = SystemDictionary::sun_misc_AtomicLongCSImpl_klass();
2772 // If this class is not present, its value field offset won't be referenced.
2773 if (k != NULL) {
2774 compute_offset(_value_offset, k, vmSymbols::value_name(), vmSymbols::long_signature());
2775 }
2776 }
2778 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
2779 if (_owner_offset != 0) return;
2781 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
2782 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
2783 klassOop k = SystemDictionary::abstract_ownable_synchronizer_klass();
2784 compute_offset(_owner_offset, k,
2785 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
2786 }
2788 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
2789 assert(_owner_offset != 0, "Must be initialized");
2790 return obj->obj_field(_owner_offset);
2791 }
2793 // Compute hard-coded offsets
2794 // Invoked before SystemDictionary::initialize, so pre-loaded classes
2795 // are not available to determine the offset_of_static_fields.
2796 void JavaClasses::compute_hard_coded_offsets() {
2797 const int x = heapOopSize;
2798 const int header = instanceOopDesc::base_offset_in_bytes();
2800 // Do the String Class
2801 java_lang_String::value_offset = java_lang_String::hc_value_offset * x + header;
2802 java_lang_String::offset_offset = java_lang_String::hc_offset_offset * x + header;
2803 java_lang_String::count_offset = java_lang_String::offset_offset + sizeof (jint);
2804 java_lang_String::hash_offset = java_lang_String::count_offset + sizeof (jint);
2806 // Do the Class Class
2807 java_lang_Class::klass_offset = java_lang_Class::hc_klass_offset * x + header;
2808 java_lang_Class::array_klass_offset = java_lang_Class::hc_array_klass_offset * x + header;
2809 java_lang_Class::resolved_constructor_offset = java_lang_Class::hc_resolved_constructor_offset * x + header;
2811 // This is NOT an offset
2812 java_lang_Class::number_of_fake_oop_fields = java_lang_Class::hc_number_of_fake_oop_fields;
2814 // Throwable Class
2815 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
2816 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
2817 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
2818 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
2820 // java_lang_boxing_object
2821 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
2822 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
2824 // java_lang_ref_Reference:
2825 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
2826 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
2827 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
2828 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
2829 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
2830 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
2831 // Artificial fields for java_lang_ref_Reference
2832 // The first field is for the discovered field added in 1.4
2833 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
2835 // java_lang_ref_SoftReference Class
2836 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
2837 // Don't multiply static fields because they are always in wordSize units
2838 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
2840 // java_lang_ClassLoader
2841 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
2843 // java_lang_System
2844 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
2845 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
2846 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
2848 // java_lang_StackTraceElement
2849 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
2850 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
2851 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
2852 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
2853 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
2854 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
2855 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
2856 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
2857 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
2859 }
2862 // Compute non-hard-coded field offsets of all the classes in this file
2863 void JavaClasses::compute_offsets() {
2865 java_lang_Class::compute_offsets();
2866 java_lang_System::compute_offsets();
2867 java_lang_Thread::compute_offsets();
2868 java_lang_ThreadGroup::compute_offsets();
2869 if (EnableMethodHandles) {
2870 java_dyn_MethodHandle::compute_offsets();
2871 sun_dyn_MemberName::compute_offsets();
2872 sun_dyn_DirectMethodHandle::compute_offsets();
2873 sun_dyn_BoundMethodHandle::compute_offsets();
2874 sun_dyn_AdapterMethodHandle::compute_offsets();
2875 java_dyn_MethodType::compute_offsets();
2876 java_dyn_MethodTypeForm::compute_offsets();
2877 }
2878 if (EnableInvokeDynamic) {
2879 java_dyn_CallSite::compute_offsets();
2880 }
2881 java_security_AccessControlContext::compute_offsets();
2882 // Initialize reflection classes. The layouts of these classes
2883 // changed with the new reflection implementation in JDK 1.4, and
2884 // since the Universe doesn't know what JDK version it is until this
2885 // point we defer computation of these offsets until now.
2886 java_lang_reflect_AccessibleObject::compute_offsets();
2887 java_lang_reflect_Method::compute_offsets();
2888 java_lang_reflect_Constructor::compute_offsets();
2889 java_lang_reflect_Field::compute_offsets();
2890 if (JDK_Version::is_gte_jdk14x_version()) {
2891 java_nio_Buffer::compute_offsets();
2892 }
2893 if (JDK_Version::is_gte_jdk15x_version()) {
2894 sun_reflect_ConstantPool::compute_offsets();
2895 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
2896 }
2897 sun_misc_AtomicLongCSImpl::compute_offsets();
2899 // generated interpreter code wants to know about the offsets we just computed:
2900 AbstractAssembler::update_delayed_values();
2901 }
2903 #ifndef PRODUCT
2905 // These functions exist to assert the validity of hard-coded field offsets to guard
2906 // against changes in the class files
2908 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
2909 EXCEPTION_MARK;
2910 fieldDescriptor fd;
2911 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH);
2912 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
2913 instanceKlassHandle h_klass (THREAD, k);
2914 //instanceKlassHandle h_klass(klass);
2915 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH);
2916 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH);
2917 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) {
2918 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
2919 return false;
2920 }
2921 if (fd.is_static()) {
2922 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
2923 return false;
2924 }
2925 if (fd.offset() == hardcoded_offset ) {
2926 return true;
2927 } else {
2928 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
2929 klass_name, field_name, hardcoded_offset, fd.offset());
2930 return false;
2931 }
2932 }
2935 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
2936 EXCEPTION_MARK;
2937 fieldDescriptor fd;
2938 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH);
2939 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
2940 instanceKlassHandle h_klass (THREAD, k);
2941 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH);
2942 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH);
2943 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) {
2944 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
2945 return false;
2946 }
2947 if (!fd.is_static()) {
2948 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
2949 return false;
2950 }
2951 if (fd.offset() == hardcoded_offset + h_klass->offset_of_static_fields()) {
2952 return true;
2953 } else {
2954 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());
2955 return false;
2956 }
2957 }
2960 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
2961 EXCEPTION_MARK;
2962 fieldDescriptor fd;
2963 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH);
2964 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
2965 instanceKlassHandle h_klass (THREAD, k);
2966 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH);
2967 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH);
2968 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) {
2969 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
2970 return false;
2971 }
2972 if (!fd.is_static() || !fd.has_initial_value()) {
2973 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
2974 return false;
2975 }
2976 if (!fd.initial_value_tag().is_int()) {
2977 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
2978 return false;
2979 }
2980 jint field_value = fd.int_initial_value();
2981 if (field_value == hardcoded_constant) {
2982 return true;
2983 } else {
2984 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);
2985 return false;
2986 }
2987 }
2990 // Check the hard-coded field offsets of all the classes in this file
2992 void JavaClasses::check_offsets() {
2993 bool valid = true;
2995 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
2996 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
2998 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
2999 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3001 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3002 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3004 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3005 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3007 // java.lang.String
3009 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3010 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3011 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3012 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3014 // java.lang.Class
3016 // Fake fields
3017 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3018 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3019 // CHECK_OFFSET("java/lang/Class", java_lang_Class, resolved_constructor); // %%% this needs to be checked
3021 // java.lang.Throwable
3023 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3024 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3025 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3026 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3028 // Boxed primitive objects (java_lang_boxing_object)
3030 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3031 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3032 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3033 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3034 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3035 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3036 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3037 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3039 // java.lang.ClassLoader
3041 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3043 // java.lang.System
3045 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3046 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3047 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3049 // java.lang.StackTraceElement
3051 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3052 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3053 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3054 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3056 // java.lang.ref.Reference
3058 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3059 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3060 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3061 // Fake field
3062 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3063 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3064 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3066 // java.lang.ref.SoftReference
3068 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3069 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3071 // java.lang.AssertionStatusDirectives
3072 //
3073 // The CheckAssertionStatusDirectives boolean can be removed from here and
3074 // globals.hpp after the AssertionStatusDirectives class has been integrated
3075 // into merlin "for some time." Without it, the vm will fail with early
3076 // merlin builds.
3078 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) {
3079 const char* nm = "java/lang/AssertionStatusDirectives";
3080 const char* sig = "[Ljava/lang/String;";
3081 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3082 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3083 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3084 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3085 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3086 }
3088 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3089 }
3091 #endif // PRODUCT
3093 void javaClasses_init() {
3094 JavaClasses::compute_offsets();
3095 JavaClasses::check_offsets();
3096 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3097 }