Fri, 20 Mar 2009 23:19:36 -0700
6814659: separable cleanups and subroutines for 6655638
Summary: preparatory but separable changes for method handles
Reviewed-by: kvn, never
1 /*
2 * Copyright 1997-2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
25 # include "incls/_precompiled.incl"
26 # include "incls/_javaClasses.cpp.incl"
28 // Helpful routine for computing field offsets at run time rather than hardcoding them
29 static void
30 compute_offset(int &dest_offset,
31 klassOop klass_oop, symbolOop name_symbol, symbolOop signature_symbol) {
32 fieldDescriptor fd;
33 instanceKlass* ik = instanceKlass::cast(klass_oop);
34 if (!ik->find_local_field(name_symbol, signature_symbol, &fd)) {
35 ResourceMark rm;
36 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
37 fatal("Invalid layout of preloaded class");
38 }
39 dest_offset = fd.offset();
40 }
42 // Same as above but for "optional" offsets that might not be present in certain JDK versions
43 static void
44 compute_optional_offset(int& dest_offset,
45 klassOop klass_oop, symbolOop name_symbol, symbolOop signature_symbol) {
46 fieldDescriptor fd;
47 instanceKlass* ik = instanceKlass::cast(klass_oop);
48 if (ik->find_local_field(name_symbol, signature_symbol, &fd)) {
49 dest_offset = fd.offset();
50 }
51 }
53 Handle java_lang_String::basic_create(int length, bool tenured, TRAPS) {
54 // Create the String object first, so there's a chance that the String
55 // and the char array it points to end up in the same cache line.
56 oop obj;
57 if (tenured) {
58 obj = instanceKlass::cast(SystemDictionary::string_klass())->allocate_permanent_instance(CHECK_NH);
59 } else {
60 obj = instanceKlass::cast(SystemDictionary::string_klass())->allocate_instance(CHECK_NH);
61 }
63 // Create the char array. The String object must be handlized here
64 // because GC can happen as a result of the allocation attempt.
65 Handle h_obj(THREAD, obj);
66 typeArrayOop buffer;
67 if (tenured) {
68 buffer = oopFactory::new_permanent_charArray(length, CHECK_NH);
69 } else {
70 buffer = oopFactory::new_charArray(length, CHECK_NH);
71 }
73 // Point the String at the char array
74 obj = h_obj();
75 set_value(obj, buffer);
76 // No need to zero the offset, allocation zero'ed the entire String object
77 assert(offset(obj) == 0, "initial String offset should be zero");
78 //set_offset(obj, 0);
79 set_count(obj, length);
81 return h_obj;
82 }
84 Handle java_lang_String::basic_create_from_unicode(jchar* unicode, int length, bool tenured, TRAPS) {
85 Handle h_obj = basic_create(length, tenured, CHECK_NH);
86 typeArrayOop buffer = value(h_obj());
87 for (int index = 0; index < length; index++) {
88 buffer->char_at_put(index, unicode[index]);
89 }
90 return h_obj;
91 }
93 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
94 return basic_create_from_unicode(unicode, length, false, CHECK_NH);
95 }
97 Handle java_lang_String::create_tenured_from_unicode(jchar* unicode, int length, TRAPS) {
98 return basic_create_from_unicode(unicode, length, true, CHECK_NH);
99 }
101 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
102 Handle h_obj = basic_create_from_unicode(unicode, length, false, CHECK_0);
103 return h_obj();
104 }
106 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
107 if (utf8_str == NULL) {
108 return Handle();
109 }
110 int length = UTF8::unicode_length(utf8_str);
111 Handle h_obj = basic_create(length, false, CHECK_NH);
112 if (length > 0) {
113 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
114 }
115 return h_obj;
116 }
118 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
119 Handle h_obj = create_from_str(utf8_str, CHECK_0);
120 return h_obj();
121 }
123 Handle java_lang_String::create_from_symbol(symbolHandle symbol, TRAPS) {
124 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
125 Handle h_obj = basic_create(length, false, CHECK_NH);
126 if (length > 0) {
127 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
128 }
129 return h_obj;
130 }
132 // Converts a C string to a Java String based on current encoding
133 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
134 assert(str != NULL, "bad arguments");
136 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
137 static to_java_string_fn_t _to_java_string_fn = NULL;
139 if (_to_java_string_fn == NULL) {
140 void *lib_handle = os::native_java_library();
141 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, hpi::dll_lookup(lib_handle, "NewStringPlatform"));
142 if (_to_java_string_fn == NULL) {
143 fatal("NewStringPlatform missing");
144 }
145 }
147 jstring js = NULL;
148 { JavaThread* thread = (JavaThread*)THREAD;
149 assert(thread->is_Java_thread(), "must be java thread");
150 HandleMark hm(thread);
151 ThreadToNativeFromVM ttn(thread);
152 js = (_to_java_string_fn)(thread->jni_environment(), str);
153 }
154 return Handle(THREAD, JNIHandles::resolve(js));
155 }
157 // Converts a Java String to a native C string that can be used for
158 // native OS calls.
159 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
161 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
162 static to_platform_string_fn_t _to_platform_string_fn = NULL;
164 if (_to_platform_string_fn == NULL) {
165 void *lib_handle = os::native_java_library();
166 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, hpi::dll_lookup(lib_handle, "GetStringPlatformChars"));
167 if (_to_platform_string_fn == NULL) {
168 fatal("GetStringPlatformChars missing");
169 }
170 }
172 char *native_platform_string;
173 { JavaThread* thread = (JavaThread*)THREAD;
174 assert(thread->is_Java_thread(), "must be java thread");
175 JNIEnv *env = thread->jni_environment();
176 jstring js = (jstring) JNIHandles::make_local(env, java_string());
177 bool is_copy;
178 HandleMark hm(thread);
179 ThreadToNativeFromVM ttn(thread);
180 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
181 assert(is_copy == JNI_TRUE, "is_copy value changed");
182 JNIHandles::destroy_local(js);
183 }
184 return native_platform_string;
185 }
187 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
188 oop obj = java_string();
189 // Typical usage is to convert all '/' to '.' in string.
190 typeArrayOop value = java_lang_String::value(obj);
191 int offset = java_lang_String::offset(obj);
192 int length = java_lang_String::length(obj);
194 // First check if any from_char exist
195 int index; // Declared outside, used later
196 for (index = 0; index < length; index++) {
197 if (value->char_at(index + offset) == from_char) {
198 break;
199 }
200 }
201 if (index == length) {
202 // No from_char, so do not copy.
203 return java_string;
204 }
206 // Create new UNICODE buffer. Must handlize value because GC
207 // may happen during String and char array creation.
208 typeArrayHandle h_value(THREAD, value);
209 Handle string = basic_create(length, false, CHECK_NH);
211 typeArrayOop from_buffer = h_value();
212 typeArrayOop to_buffer = java_lang_String::value(string());
214 // Copy contents
215 for (index = 0; index < length; index++) {
216 jchar c = from_buffer->char_at(index + offset);
217 if (c == from_char) {
218 c = to_char;
219 }
220 to_buffer->char_at_put(index, c);
221 }
222 return string;
223 }
225 jchar* java_lang_String::as_unicode_string(oop java_string, int& length) {
226 typeArrayOop value = java_lang_String::value(java_string);
227 int offset = java_lang_String::offset(java_string);
228 length = java_lang_String::length(java_string);
230 jchar* result = NEW_RESOURCE_ARRAY(jchar, length);
231 for (int index = 0; index < length; index++) {
232 result[index] = value->char_at(index + offset);
233 }
234 return result;
235 }
237 symbolHandle java_lang_String::as_symbol(Handle java_string, TRAPS) {
238 oop obj = java_string();
239 typeArrayOop value = java_lang_String::value(obj);
240 int offset = java_lang_String::offset(obj);
241 int length = java_lang_String::length(obj);
242 jchar* base = value->char_at_addr(offset);
243 symbolOop sym = SymbolTable::lookup_unicode(base, length, THREAD);
244 return symbolHandle(THREAD, sym);
245 }
247 symbolOop java_lang_String::as_symbol_or_null(oop java_string) {
248 typeArrayOop value = java_lang_String::value(java_string);
249 int offset = java_lang_String::offset(java_string);
250 int length = java_lang_String::length(java_string);
251 jchar* base = value->char_at_addr(offset);
252 return SymbolTable::probe_unicode(base, length);
253 }
256 int java_lang_String::utf8_length(oop java_string) {
257 typeArrayOop value = java_lang_String::value(java_string);
258 int offset = java_lang_String::offset(java_string);
259 int length = java_lang_String::length(java_string);
260 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
261 return UNICODE::utf8_length(position, length);
262 }
264 char* java_lang_String::as_utf8_string(oop java_string) {
265 typeArrayOop value = java_lang_String::value(java_string);
266 int offset = java_lang_String::offset(java_string);
267 int length = java_lang_String::length(java_string);
268 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
269 return UNICODE::as_utf8(position, length);
270 }
272 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
273 typeArrayOop value = java_lang_String::value(java_string);
274 int offset = java_lang_String::offset(java_string);
275 int length = java_lang_String::length(java_string);
276 assert(start + len <= length, "just checking");
277 jchar* position = value->char_at_addr(offset + start);
278 return UNICODE::as_utf8(position, len);
279 }
281 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
282 assert(SharedSkipVerify ||
283 java_string->klass() == SystemDictionary::string_klass(),
284 "must be java_string");
285 typeArrayOop value = java_lang_String::value(java_string);
286 int offset = java_lang_String::offset(java_string);
287 int length = java_lang_String::length(java_string);
288 if (length != len) {
289 return false;
290 }
291 for (int i = 0; i < len; i++) {
292 if (value->char_at(i + offset) != chars[i]) {
293 return false;
294 }
295 }
296 return true;
297 }
299 void java_lang_String::print(Handle java_string, outputStream* st) {
300 oop obj = java_string();
301 assert(obj->klass() == SystemDictionary::string_klass(), "must be java_string");
302 typeArrayOop value = java_lang_String::value(obj);
303 int offset = java_lang_String::offset(obj);
304 int length = java_lang_String::length(obj);
306 int end = MIN2(length, 100);
307 if (value == NULL) {
308 // This can happen if, e.g., printing a String
309 // object before its initializer has been called
310 st->print_cr("NULL");
311 } else {
312 st->print("\"");
313 for (int index = 0; index < length; index++) {
314 st->print("%c", value->char_at(index + offset));
315 }
316 st->print("\"");
317 }
318 }
321 oop java_lang_Class::create_mirror(KlassHandle k, TRAPS) {
322 assert(k->java_mirror() == NULL, "should only assign mirror once");
323 // Use this moment of initialization to cache modifier_flags also,
324 // to support Class.getModifiers(). Instance classes recalculate
325 // the cached flags after the class file is parsed, but before the
326 // class is put into the system dictionary.
327 int computed_modifiers = k->compute_modifier_flags(CHECK_0);
328 k->set_modifier_flags(computed_modifiers);
329 if (SystemDictionary::class_klass_loaded()) {
330 // Allocate mirror (java.lang.Class instance)
331 Handle mirror = instanceKlass::cast(SystemDictionary::class_klass())->allocate_permanent_instance(CHECK_0);
332 // Setup indirections
333 mirror->obj_field_put(klass_offset, k());
334 k->set_java_mirror(mirror());
335 // It might also have a component mirror. This mirror must already exist.
336 if (k->oop_is_javaArray()) {
337 Handle comp_mirror;
338 if (k->oop_is_typeArray()) {
339 BasicType type = typeArrayKlass::cast(k->as_klassOop())->element_type();
340 comp_mirror = Universe::java_mirror(type);
341 assert(comp_mirror.not_null(), "must have primitive mirror");
342 } else if (k->oop_is_objArray()) {
343 klassOop element_klass = objArrayKlass::cast(k->as_klassOop())->element_klass();
344 if (element_klass != NULL
345 && (Klass::cast(element_klass)->oop_is_instance() ||
346 Klass::cast(element_klass)->oop_is_javaArray())) {
347 comp_mirror = Klass::cast(element_klass)->java_mirror();
348 assert(comp_mirror.not_null(), "must have element mirror");
349 }
350 // else some object array internal to the VM, like systemObjArrayKlassObj
351 }
352 if (comp_mirror.not_null()) {
353 // Two-way link between the array klass and its component mirror:
354 arrayKlass::cast(k->as_klassOop())->set_component_mirror(comp_mirror());
355 set_array_klass(comp_mirror(), k->as_klassOop());
356 }
357 }
358 return mirror();
359 } else {
360 return NULL;
361 }
362 }
365 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
366 // This should be improved by adding a field at the Java level or by
367 // introducing a new VM klass (see comment in ClassFileParser)
368 oop java_class = instanceKlass::cast(SystemDictionary::class_klass())->allocate_permanent_instance(CHECK_0);
369 if (type != T_VOID) {
370 klassOop aklass = Universe::typeArrayKlassObj(type);
371 assert(aklass != NULL, "correct bootstrap");
372 set_array_klass(java_class, aklass);
373 }
374 return java_class;
375 }
378 klassOop java_lang_Class::as_klassOop(oop java_class) {
379 //%note memory_2
380 klassOop k = klassOop(java_class->obj_field(klass_offset));
381 assert(k == NULL || k->is_klass(), "type check");
382 return k;
383 }
386 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
387 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
388 symbolOop name = NULL;
389 bool is_instance = false;
390 if (is_primitive(java_class)) {
391 name = vmSymbols::type_signature(primitive_type(java_class));
392 } else {
393 klassOop k = as_klassOop(java_class);
394 is_instance = Klass::cast(k)->oop_is_instance();
395 name = Klass::cast(k)->name();
396 }
397 if (name == NULL) {
398 st->print("<null>");
399 return;
400 }
401 if (is_instance) st->print("L");
402 st->write((char*) name->base(), (int) name->utf8_length());
403 if (is_instance) st->print(";");
404 }
406 symbolOop java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
407 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
408 symbolOop name = NULL;
409 if (is_primitive(java_class)) {
410 return vmSymbols::type_signature(primitive_type(java_class));
411 } else {
412 klassOop k = as_klassOop(java_class);
413 if (!Klass::cast(k)->oop_is_instance()) {
414 return Klass::cast(k)->name();
415 } else {
416 ResourceMark rm;
417 const char* sigstr = Klass::cast(k)->signature_name();
418 int siglen = (int) strlen(sigstr);
419 if (!intern_if_not_found)
420 return SymbolTable::probe(sigstr, siglen);
421 else
422 return oopFactory::new_symbol(sigstr, siglen, THREAD);
423 }
424 }
425 }
428 klassOop java_lang_Class::array_klass(oop java_class) {
429 klassOop k = klassOop(java_class->obj_field(array_klass_offset));
430 assert(k == NULL || k->is_klass() && Klass::cast(k)->oop_is_javaArray(), "should be array klass");
431 return k;
432 }
435 void java_lang_Class::set_array_klass(oop java_class, klassOop klass) {
436 assert(klass->is_klass() && Klass::cast(klass)->oop_is_javaArray(), "should be array klass");
437 java_class->obj_field_put(array_klass_offset, klass);
438 }
441 methodOop java_lang_Class::resolved_constructor(oop java_class) {
442 oop constructor = java_class->obj_field(resolved_constructor_offset);
443 assert(constructor == NULL || constructor->is_method(), "should be method");
444 return methodOop(constructor);
445 }
448 void java_lang_Class::set_resolved_constructor(oop java_class, methodOop constructor) {
449 assert(constructor->is_method(), "should be method");
450 java_class->obj_field_put(resolved_constructor_offset, constructor);
451 }
454 bool java_lang_Class::is_primitive(oop java_class) {
455 // should assert:
456 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
457 klassOop k = klassOop(java_class->obj_field(klass_offset));
458 return k == NULL;
459 }
462 BasicType java_lang_Class::primitive_type(oop java_class) {
463 assert(java_lang_Class::is_primitive(java_class), "just checking");
464 klassOop ak = klassOop(java_class->obj_field(array_klass_offset));
465 BasicType type = T_VOID;
466 if (ak != NULL) {
467 // Note: create_basic_type_mirror above initializes ak to a non-null value.
468 type = arrayKlass::cast(ak)->element_type();
469 } else {
470 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
471 }
472 assert(Universe::java_mirror(type) == java_class, "must be consistent");
473 return type;
474 }
476 BasicType java_lang_Class::as_BasicType(oop java_class, klassOop* reference_klass) {
477 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
478 if (is_primitive(java_class)) {
479 if (reference_klass != NULL)
480 (*reference_klass) = NULL;
481 return primitive_type(java_class);
482 } else {
483 if (reference_klass != NULL)
484 (*reference_klass) = as_klassOop(java_class);
485 return T_OBJECT;
486 }
487 }
490 oop java_lang_Class::primitive_mirror(BasicType t) {
491 oop mirror = Universe::java_mirror(t);
492 assert(mirror != NULL && mirror->is_a(SystemDictionary::class_klass()), "must be a Class");
493 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
494 return mirror;
495 }
497 bool java_lang_Class::offsets_computed = false;
498 int java_lang_Class::classRedefinedCount_offset = -1;
499 int java_lang_Class::parallelCapable_offset = -1;
501 void java_lang_Class::compute_offsets() {
502 assert(!offsets_computed, "offsets should be initialized only once");
503 offsets_computed = true;
505 klassOop k = SystemDictionary::class_klass();
506 // The classRedefinedCount field is only present starting in 1.5,
507 // so don't go fatal.
508 compute_optional_offset(classRedefinedCount_offset,
509 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
511 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
512 klassOop k1 = SystemDictionary::classloader_klass();
513 compute_optional_offset(parallelCapable_offset,
514 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
515 }
517 // For class loader classes, parallelCapable defined
518 // based on non-null field
519 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
520 bool java_lang_Class::parallelCapable(oop class_loader) {
521 if (!JDK_Version::is_gte_jdk17x_version()
522 || parallelCapable_offset == -1) {
523 // Default for backward compatibility is false
524 return false;
525 }
526 return (class_loader->obj_field(parallelCapable_offset) != NULL);
527 }
529 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
530 if (!JDK_Version::is_gte_jdk15x_version()
531 || classRedefinedCount_offset == -1) {
532 // The classRedefinedCount field is only present starting in 1.5.
533 // If we don't have an offset for it then just return -1 as a marker.
534 return -1;
535 }
537 return the_class_mirror->int_field(classRedefinedCount_offset);
538 }
540 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
541 if (!JDK_Version::is_gte_jdk15x_version()
542 || classRedefinedCount_offset == -1) {
543 // The classRedefinedCount field is only present starting in 1.5.
544 // If we don't have an offset for it then nothing to set.
545 return;
546 }
548 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
549 }
552 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
553 // platform thread structure, and a eetop offset which was used for thread
554 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
555 // merged, so in the HotSpot VM we just use the eetop field for the thread
556 // instead of the privateInfo_offset.
557 //
558 // Note: The stackSize field is only present starting in 1.4.
560 int java_lang_Thread::_name_offset = 0;
561 int java_lang_Thread::_group_offset = 0;
562 int java_lang_Thread::_contextClassLoader_offset = 0;
563 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
564 int java_lang_Thread::_priority_offset = 0;
565 int java_lang_Thread::_eetop_offset = 0;
566 int java_lang_Thread::_daemon_offset = 0;
567 int java_lang_Thread::_stillborn_offset = 0;
568 int java_lang_Thread::_stackSize_offset = 0;
569 int java_lang_Thread::_tid_offset = 0;
570 int java_lang_Thread::_thread_status_offset = 0;
571 int java_lang_Thread::_park_blocker_offset = 0;
572 int java_lang_Thread::_park_event_offset = 0 ;
575 void java_lang_Thread::compute_offsets() {
576 assert(_group_offset == 0, "offsets should be initialized only once");
578 klassOop k = SystemDictionary::thread_klass();
579 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature());
580 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
581 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
582 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
583 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
584 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
585 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
586 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
587 // The stackSize field is only present starting in 1.4, so don't go fatal.
588 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
589 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
590 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
591 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
592 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
593 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
594 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
595 vmSymbols::long_signature());
596 }
599 JavaThread* java_lang_Thread::thread(oop java_thread) {
600 return (JavaThread*)java_thread->address_field(_eetop_offset);
601 }
604 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
605 java_thread->address_field_put(_eetop_offset, (address)thread);
606 }
609 typeArrayOop java_lang_Thread::name(oop java_thread) {
610 oop name = java_thread->obj_field(_name_offset);
611 assert(name == NULL || (name->is_typeArray() && typeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking");
612 return typeArrayOop(name);
613 }
616 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) {
617 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL");
618 java_thread->obj_field_put(_name_offset, name);
619 }
622 ThreadPriority java_lang_Thread::priority(oop java_thread) {
623 return (ThreadPriority)java_thread->int_field(_priority_offset);
624 }
627 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
628 java_thread->int_field_put(_priority_offset, priority);
629 }
632 oop java_lang_Thread::threadGroup(oop java_thread) {
633 return java_thread->obj_field(_group_offset);
634 }
637 bool java_lang_Thread::is_stillborn(oop java_thread) {
638 return java_thread->bool_field(_stillborn_offset) != 0;
639 }
642 // We never have reason to turn the stillborn bit off
643 void java_lang_Thread::set_stillborn(oop java_thread) {
644 java_thread->bool_field_put(_stillborn_offset, true);
645 }
648 bool java_lang_Thread::is_alive(oop java_thread) {
649 JavaThread* thr = java_lang_Thread::thread(java_thread);
650 return (thr != NULL);
651 }
654 bool java_lang_Thread::is_daemon(oop java_thread) {
655 return java_thread->bool_field(_daemon_offset) != 0;
656 }
659 void java_lang_Thread::set_daemon(oop java_thread) {
660 java_thread->bool_field_put(_daemon_offset, true);
661 }
663 oop java_lang_Thread::context_class_loader(oop java_thread) {
664 return java_thread->obj_field(_contextClassLoader_offset);
665 }
667 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
668 return java_thread->obj_field(_inheritedAccessControlContext_offset);
669 }
672 jlong java_lang_Thread::stackSize(oop java_thread) {
673 // The stackSize field is only present starting in 1.4
674 if (_stackSize_offset > 0) {
675 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check");
676 return java_thread->long_field(_stackSize_offset);
677 } else {
678 return 0;
679 }
680 }
682 // Write the thread status value to threadStatus field in java.lang.Thread java class.
683 void java_lang_Thread::set_thread_status(oop java_thread,
684 java_lang_Thread::ThreadStatus status) {
685 assert(JavaThread::current()->thread_state() == _thread_in_vm, "Java Thread is not running in vm");
686 // The threadStatus is only present starting in 1.5
687 if (_thread_status_offset > 0) {
688 java_thread->int_field_put(_thread_status_offset, status);
689 }
690 }
692 // Read thread status value from threadStatus field in java.lang.Thread java class.
693 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
694 assert(Thread::current()->is_VM_thread() ||
695 JavaThread::current()->thread_state() == _thread_in_vm,
696 "Java Thread is not running in vm");
697 // The threadStatus is only present starting in 1.5
698 if (_thread_status_offset > 0) {
699 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
700 } else {
701 // All we can easily figure out is if it is alive, but that is
702 // enough info for a valid unknown status.
703 // These aren't restricted to valid set ThreadStatus values, so
704 // use JVMTI values and cast.
705 JavaThread* thr = java_lang_Thread::thread(java_thread);
706 if (thr == NULL) {
707 // the thread hasn't run yet or is in the process of exiting
708 return NEW;
709 }
710 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
711 }
712 }
715 jlong java_lang_Thread::thread_id(oop java_thread) {
716 // The thread ID field is only present starting in 1.5
717 if (_tid_offset > 0) {
718 return java_thread->long_field(_tid_offset);
719 } else {
720 return 0;
721 }
722 }
724 oop java_lang_Thread::park_blocker(oop java_thread) {
725 assert(JDK_Version::current().supports_thread_park_blocker() &&
726 _park_blocker_offset != 0, "Must support parkBlocker field");
728 if (_park_blocker_offset > 0) {
729 return java_thread->obj_field(_park_blocker_offset);
730 }
732 return NULL;
733 }
735 jlong java_lang_Thread::park_event(oop java_thread) {
736 if (_park_event_offset > 0) {
737 return java_thread->long_field(_park_event_offset);
738 }
739 return 0;
740 }
742 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
743 if (_park_event_offset > 0) {
744 java_thread->long_field_put(_park_event_offset, ptr);
745 return true;
746 }
747 return false;
748 }
751 const char* java_lang_Thread::thread_status_name(oop java_thread) {
752 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status");
753 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
754 switch (status) {
755 case NEW : return "NEW";
756 case RUNNABLE : return "RUNNABLE";
757 case SLEEPING : return "TIMED_WAITING (sleeping)";
758 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
759 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
760 case PARKED : return "WAITING (parking)";
761 case PARKED_TIMED : return "TIMED_WAITING (parking)";
762 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
763 case TERMINATED : return "TERMINATED";
764 default : return "UNKNOWN";
765 };
766 }
767 int java_lang_ThreadGroup::_parent_offset = 0;
768 int java_lang_ThreadGroup::_name_offset = 0;
769 int java_lang_ThreadGroup::_threads_offset = 0;
770 int java_lang_ThreadGroup::_groups_offset = 0;
771 int java_lang_ThreadGroup::_maxPriority_offset = 0;
772 int java_lang_ThreadGroup::_destroyed_offset = 0;
773 int java_lang_ThreadGroup::_daemon_offset = 0;
774 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
775 int java_lang_ThreadGroup::_nthreads_offset = 0;
776 int java_lang_ThreadGroup::_ngroups_offset = 0;
778 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
779 assert(java_thread_group->is_oop(), "thread group must be oop");
780 return java_thread_group->obj_field(_parent_offset);
781 }
783 // ("name as oop" accessor is not necessary)
785 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
786 oop name = java_thread_group->obj_field(_name_offset);
787 // ThreadGroup.name can be null
788 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
789 }
791 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
792 assert(java_thread_group->is_oop(), "thread group must be oop");
793 return java_thread_group->int_field(_nthreads_offset);
794 }
796 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
797 oop threads = java_thread_group->obj_field(_threads_offset);
798 assert(threads != NULL, "threadgroups should have threads");
799 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
800 return objArrayOop(threads);
801 }
803 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
804 assert(java_thread_group->is_oop(), "thread group must be oop");
805 return java_thread_group->int_field(_ngroups_offset);
806 }
808 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
809 oop groups = java_thread_group->obj_field(_groups_offset);
810 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
811 return objArrayOop(groups);
812 }
814 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
815 assert(java_thread_group->is_oop(), "thread group must be oop");
816 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
817 }
819 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
820 assert(java_thread_group->is_oop(), "thread group must be oop");
821 return java_thread_group->bool_field(_destroyed_offset) != 0;
822 }
824 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
825 assert(java_thread_group->is_oop(), "thread group must be oop");
826 return java_thread_group->bool_field(_daemon_offset) != 0;
827 }
829 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
830 assert(java_thread_group->is_oop(), "thread group must be oop");
831 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
832 }
834 void java_lang_ThreadGroup::compute_offsets() {
835 assert(_parent_offset == 0, "offsets should be initialized only once");
837 klassOop k = SystemDictionary::threadGroup_klass();
839 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
840 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
841 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
842 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
843 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
844 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
845 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
846 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
847 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
848 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
849 }
851 oop java_lang_Throwable::backtrace(oop throwable) {
852 return throwable->obj_field_acquire(backtrace_offset);
853 }
856 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
857 throwable->release_obj_field_put(backtrace_offset, value);
858 }
861 oop java_lang_Throwable::message(oop throwable) {
862 return throwable->obj_field(detailMessage_offset);
863 }
866 oop java_lang_Throwable::message(Handle throwable) {
867 return throwable->obj_field(detailMessage_offset);
868 }
871 void java_lang_Throwable::set_message(oop throwable, oop value) {
872 throwable->obj_field_put(detailMessage_offset, value);
873 }
876 void java_lang_Throwable::clear_stacktrace(oop throwable) {
877 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
878 throwable->obj_field_put(stackTrace_offset, NULL);
879 }
882 void java_lang_Throwable::print(oop throwable, outputStream* st) {
883 ResourceMark rm;
884 klassOop k = throwable->klass();
885 assert(k != NULL, "just checking");
886 st->print("%s", instanceKlass::cast(k)->external_name());
887 oop msg = message(throwable);
888 if (msg != NULL) {
889 st->print(": %s", java_lang_String::as_utf8_string(msg));
890 }
891 }
894 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
895 ResourceMark rm;
896 klassOop k = throwable->klass();
897 assert(k != NULL, "just checking");
898 st->print("%s", instanceKlass::cast(k)->external_name());
899 oop msg = message(throwable);
900 if (msg != NULL) {
901 st->print(": %s", java_lang_String::as_utf8_string(msg));
902 }
903 }
905 // Print stack trace element to resource allocated buffer
906 char* java_lang_Throwable::print_stack_element_to_buffer(methodOop method, int bci) {
907 // Get strings and string lengths
908 instanceKlass* klass = instanceKlass::cast(method->method_holder());
909 const char* klass_name = klass->external_name();
910 int buf_len = (int)strlen(klass_name);
911 char* source_file_name;
912 if (klass->source_file_name() == NULL) {
913 source_file_name = NULL;
914 } else {
915 source_file_name = klass->source_file_name()->as_C_string();
916 buf_len += (int)strlen(source_file_name);
917 }
918 char* method_name = method->name()->as_C_string();
919 buf_len += (int)strlen(method_name);
921 // Allocate temporary buffer with extra space for formatting and line number
922 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
924 // Print stack trace line in buffer
925 sprintf(buf, "\tat %s.%s", klass_name, method_name);
926 if (method->is_native()) {
927 strcat(buf, "(Native Method)");
928 } else {
929 int line_number = method->line_number_from_bci(bci);
930 if (source_file_name != NULL && (line_number != -1)) {
931 // Sourcename and linenumber
932 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
933 } else if (source_file_name != NULL) {
934 // Just sourcename
935 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
936 } else {
937 // Neither soucename and linenumber
938 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
939 }
940 nmethod* nm = method->code();
941 if (WizardMode && nm != NULL) {
942 sprintf(buf + (int)strlen(buf), "(nmethod " PTR_FORMAT ")", (intptr_t)nm);
943 }
944 }
946 return buf;
947 }
950 void java_lang_Throwable::print_stack_element(Handle stream, methodOop method, int bci) {
951 ResourceMark rm;
952 char* buf = print_stack_element_to_buffer(method, bci);
953 print_to_stream(stream, buf);
954 }
956 void java_lang_Throwable::print_stack_element(outputStream *st, methodOop method, int bci) {
957 ResourceMark rm;
958 char* buf = print_stack_element_to_buffer(method, bci);
959 st->print_cr("%s", buf);
960 }
962 void java_lang_Throwable::print_to_stream(Handle stream, const char* str) {
963 if (stream.is_null()) {
964 tty->print_cr("%s", str);
965 } else {
966 EXCEPTION_MARK;
967 JavaValue result(T_VOID);
968 Handle arg (THREAD, oopFactory::new_charArray(str, THREAD));
969 if (!HAS_PENDING_EXCEPTION) {
970 JavaCalls::call_virtual(&result,
971 stream,
972 KlassHandle(THREAD, stream->klass()),
973 vmSymbolHandles::println_name(),
974 vmSymbolHandles::char_array_void_signature(),
975 arg,
976 THREAD);
977 }
978 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
979 if (HAS_PENDING_EXCEPTION) CLEAR_PENDING_EXCEPTION;
980 }
982 }
985 const char* java_lang_Throwable::no_stack_trace_message() {
986 return "\t<<no stack trace available>>";
987 }
990 // Currently used only for exceptions occurring during startup
991 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
992 Thread *THREAD = Thread::current();
993 Handle h_throwable(THREAD, throwable);
994 while (h_throwable.not_null()) {
995 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
996 if (result.is_null()) {
997 st->print_cr(no_stack_trace_message());
998 return;
999 }
1001 while (result.not_null()) {
1002 objArrayHandle methods (THREAD,
1003 objArrayOop(result->obj_at(trace_methods_offset)));
1004 typeArrayHandle bcis (THREAD,
1005 typeArrayOop(result->obj_at(trace_bcis_offset)));
1007 if (methods.is_null() || bcis.is_null()) {
1008 st->print_cr(no_stack_trace_message());
1009 return;
1010 }
1012 int length = methods()->length();
1013 for (int index = 0; index < length; index++) {
1014 methodOop method = methodOop(methods()->obj_at(index));
1015 if (method == NULL) goto handle_cause;
1016 int bci = bcis->ushort_at(index);
1017 print_stack_element(st, method, bci);
1018 }
1019 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1020 }
1021 handle_cause:
1022 {
1023 EXCEPTION_MARK;
1024 JavaValue result(T_OBJECT);
1025 JavaCalls::call_virtual(&result,
1026 h_throwable,
1027 KlassHandle(THREAD, h_throwable->klass()),
1028 vmSymbolHandles::getCause_name(),
1029 vmSymbolHandles::void_throwable_signature(),
1030 THREAD);
1031 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1032 if (HAS_PENDING_EXCEPTION) {
1033 CLEAR_PENDING_EXCEPTION;
1034 h_throwable = Handle();
1035 } else {
1036 h_throwable = Handle(THREAD, (oop) result.get_jobject());
1037 if (h_throwable.not_null()) {
1038 st->print("Caused by: ");
1039 print(h_throwable, st);
1040 st->cr();
1041 }
1042 }
1043 }
1044 }
1045 }
1048 void java_lang_Throwable::print_stack_trace(oop throwable, oop print_stream) {
1049 // Note: this is no longer used in Merlin, but we support it for compatibility.
1050 Thread *thread = Thread::current();
1051 Handle stream(thread, print_stream);
1052 objArrayHandle result (thread, objArrayOop(backtrace(throwable)));
1053 if (result.is_null()) {
1054 print_to_stream(stream, no_stack_trace_message());
1055 return;
1056 }
1058 while (result.not_null()) {
1059 objArrayHandle methods (thread,
1060 objArrayOop(result->obj_at(trace_methods_offset)));
1061 typeArrayHandle bcis (thread,
1062 typeArrayOop(result->obj_at(trace_bcis_offset)));
1064 if (methods.is_null() || bcis.is_null()) {
1065 print_to_stream(stream, no_stack_trace_message());
1066 return;
1067 }
1069 int length = methods()->length();
1070 for (int index = 0; index < length; index++) {
1071 methodOop method = methodOop(methods()->obj_at(index));
1072 if (method == NULL) return;
1073 int bci = bcis->ushort_at(index);
1074 print_stack_element(stream, method, bci);
1075 }
1076 result = objArrayHandle(thread, objArrayOop(result->obj_at(trace_next_offset)));
1077 }
1078 }
1080 // This class provides a simple wrapper over the internal structure of
1081 // exception backtrace to insulate users of the backtrace from needing
1082 // to know what it looks like.
1083 class BacktraceBuilder: public StackObj {
1084 private:
1085 Handle _backtrace;
1086 objArrayOop _head;
1087 objArrayOop _methods;
1088 typeArrayOop _bcis;
1089 int _index;
1090 bool _dirty;
1091 No_Safepoint_Verifier _nsv;
1093 public:
1095 enum {
1096 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1097 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1098 trace_next_offset = java_lang_Throwable::trace_next_offset,
1099 trace_size = java_lang_Throwable::trace_size,
1100 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1101 };
1103 // constructor for new backtrace
1104 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _dirty(false) {
1105 expand(CHECK);
1106 _backtrace = _head;
1107 _index = 0;
1108 }
1110 void flush() {
1111 if (_dirty && _methods != NULL) {
1112 BarrierSet* bs = Universe::heap()->barrier_set();
1113 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt");
1114 bs->write_ref_array(MemRegion((HeapWord*)_methods->base(),
1115 _methods->array_size()));
1116 _dirty = false;
1117 }
1118 }
1120 void expand(TRAPS) {
1121 flush();
1123 objArrayHandle old_head(THREAD, _head);
1124 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1126 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1127 objArrayHandle new_head(THREAD, head);
1129 objArrayOop methods = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1130 objArrayHandle new_methods(THREAD, methods);
1132 typeArrayOop bcis = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1133 typeArrayHandle new_bcis(THREAD, bcis);
1135 if (!old_head.is_null()) {
1136 old_head->obj_at_put(trace_next_offset, new_head());
1137 }
1138 new_head->obj_at_put(trace_methods_offset, new_methods());
1139 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1141 _head = new_head();
1142 _methods = new_methods();
1143 _bcis = new_bcis();
1144 _index = 0;
1145 }
1147 oop backtrace() {
1148 flush();
1149 return _backtrace();
1150 }
1152 inline void push(methodOop method, short bci, TRAPS) {
1153 if (_index >= trace_chunk_size) {
1154 methodHandle mhandle(THREAD, method);
1155 expand(CHECK);
1156 method = mhandle();
1157 }
1159 _methods->obj_at_put(_index, method);
1160 // bad for UseCompressedOops
1161 // *_methods->obj_at_addr(_index) = method;
1162 _bcis->ushort_at_put(_index, bci);
1163 _index++;
1164 _dirty = true;
1165 }
1167 methodOop current_method() {
1168 assert(_index >= 0 && _index < trace_chunk_size, "out of range");
1169 return methodOop(_methods->obj_at(_index));
1170 }
1172 jushort current_bci() {
1173 assert(_index >= 0 && _index < trace_chunk_size, "out of range");
1174 return _bcis->ushort_at(_index);
1175 }
1176 };
1179 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, TRAPS) {
1180 if (!StackTraceInThrowable) return;
1181 ResourceMark rm(THREAD);
1183 // Start out by clearing the backtrace for this object, in case the VM
1184 // runs out of memory while allocating the stack trace
1185 set_backtrace(throwable(), NULL);
1186 if (JDK_Version::is_gte_jdk14x_version()) {
1187 // New since 1.4, clear lazily constructed Java level stacktrace if
1188 // refilling occurs
1189 clear_stacktrace(throwable());
1190 }
1192 int max_depth = MaxJavaStackTraceDepth;
1193 JavaThread* thread = (JavaThread*)THREAD;
1194 BacktraceBuilder bt(CHECK);
1196 // Instead of using vframe directly, this version of fill_in_stack_trace
1197 // basically handles everything by hand. This significantly improved the
1198 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1199 // See bug 6333838 for more details.
1200 // The "ASSERT" here is to verify this method generates the exactly same stack
1201 // trace as utilizing vframe.
1202 #ifdef ASSERT
1203 vframeStream st(thread);
1204 methodHandle st_method(THREAD, st.method());
1205 #endif
1206 int total_count = 0;
1207 RegisterMap map(thread, false);
1208 int decode_offset = 0;
1209 nmethod* nm = NULL;
1210 bool skip_fillInStackTrace_check = false;
1211 bool skip_throwableInit_check = false;
1213 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1214 methodOop method = NULL;
1215 int bci = 0;
1217 // Compiled java method case.
1218 if (decode_offset != 0) {
1219 DebugInfoReadStream stream(nm, decode_offset);
1220 decode_offset = stream.read_int();
1221 method = (methodOop)nm->oop_at(stream.read_int());
1222 bci = stream.read_bci();
1223 } else {
1224 if (fr.is_first_frame()) break;
1225 address pc = fr.pc();
1226 if (fr.is_interpreted_frame()) {
1227 intptr_t bcx = fr.interpreter_frame_bcx();
1228 method = fr.interpreter_frame_method();
1229 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
1230 fr = fr.sender(&map);
1231 } else {
1232 CodeBlob* cb = fr.cb();
1233 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1234 // but non nmethod
1235 fr = fr.sender(&map);
1236 if (cb == NULL || !cb->is_nmethod()) {
1237 continue;
1238 }
1239 nm = (nmethod*)cb;
1240 if (nm->method()->is_native()) {
1241 method = nm->method();
1242 bci = 0;
1243 } else {
1244 PcDesc* pd = nm->pc_desc_at(pc);
1245 decode_offset = pd->scope_decode_offset();
1246 // if decode_offset is not equal to 0, it will execute the
1247 // "compiled java method case" at the beginning of the loop.
1248 continue;
1249 }
1250 }
1251 }
1252 #ifdef ASSERT
1253 assert(st_method() == method && st.bci() == bci,
1254 "Wrong stack trace");
1255 st.next();
1256 // vframeStream::method isn't GC-safe so store off a copy
1257 // of the methodOop in case we GC.
1258 if (!st.at_end()) {
1259 st_method = st.method();
1260 }
1261 #endif
1262 if (!skip_fillInStackTrace_check) {
1263 // check "fillInStackTrace" only once, so we negate the flag
1264 // after the first time check.
1265 skip_fillInStackTrace_check = true;
1266 if (method->name() == vmSymbols::fillInStackTrace_name()) {
1267 continue;
1268 }
1269 }
1270 // skip <init> methods of the exceptions klass. If there is <init> methods
1271 // that belongs to a superclass of the exception we are going to skipping
1272 // them in stack trace. This is simlar to classic VM.
1273 if (!skip_throwableInit_check) {
1274 if (method->name() == vmSymbols::object_initializer_name() &&
1275 throwable->is_a(method->method_holder())) {
1276 continue;
1277 } else {
1278 // if no "Throwable.init()" method found, we stop checking it next time.
1279 skip_throwableInit_check = true;
1280 }
1281 }
1282 bt.push(method, bci, CHECK);
1283 total_count++;
1284 }
1286 // Put completed stack trace into throwable object
1287 set_backtrace(throwable(), bt.backtrace());
1288 }
1290 void java_lang_Throwable::fill_in_stack_trace(Handle throwable) {
1291 // No-op if stack trace is disabled
1292 if (!StackTraceInThrowable) {
1293 return;
1294 }
1296 // Disable stack traces for some preallocated out of memory errors
1297 if (!Universe::should_fill_in_stack_trace(throwable)) {
1298 return;
1299 }
1301 PRESERVE_EXCEPTION_MARK;
1303 JavaThread* thread = JavaThread::active();
1304 fill_in_stack_trace(throwable, thread);
1305 // ignore exceptions thrown during stack trace filling
1306 CLEAR_PENDING_EXCEPTION;
1307 }
1309 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1310 // Allocate stack trace - backtrace is created but not filled in
1312 // No-op if stack trace is disabled
1313 if (!StackTraceInThrowable) return;
1315 objArrayOop h_oop = oopFactory::new_objectArray(trace_size, CHECK);
1316 objArrayHandle backtrace (THREAD, h_oop);
1317 objArrayOop m_oop = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1318 objArrayHandle methods (THREAD, m_oop);
1319 typeArrayOop b = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1320 typeArrayHandle bcis(THREAD, b);
1322 // backtrace has space for one chunk (next is NULL)
1323 backtrace->obj_at_put(trace_methods_offset, methods());
1324 backtrace->obj_at_put(trace_bcis_offset, bcis());
1325 set_backtrace(throwable(), backtrace());
1326 }
1329 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1330 // Fill in stack trace into preallocated backtrace (no GC)
1332 // No-op if stack trace is disabled
1333 if (!StackTraceInThrowable) return;
1335 assert(throwable->is_a(SystemDictionary::throwable_klass()), "sanity check");
1337 oop backtrace = java_lang_Throwable::backtrace(throwable());
1338 assert(backtrace != NULL, "backtrace not preallocated");
1340 oop m = objArrayOop(backtrace)->obj_at(trace_methods_offset);
1341 objArrayOop methods = objArrayOop(m);
1342 assert(methods != NULL && methods->length() > 0, "method array not preallocated");
1344 oop b = objArrayOop(backtrace)->obj_at(trace_bcis_offset);
1345 typeArrayOop bcis = typeArrayOop(b);
1346 assert(bcis != NULL, "bci array not preallocated");
1348 assert(methods->length() == bcis->length(), "method and bci arrays should match");
1350 JavaThread* thread = JavaThread::current();
1351 ResourceMark rm(thread);
1352 vframeStream st(thread);
1354 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1355 // methods as preallocated errors aren't created by "java" code.
1357 // fill in as much stack trace as possible
1358 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1359 int chunk_count = 0;
1361 for (;!st.at_end(); st.next()) {
1362 // add element
1363 bcis->ushort_at_put(chunk_count, st.bci());
1364 methods->obj_at_put(chunk_count, st.method());
1366 chunk_count++;
1368 // Bail-out for deep stacks
1369 if (chunk_count >= max_chunks) break;
1370 }
1371 }
1374 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1375 if (throwable == NULL) {
1376 THROW_0(vmSymbols::java_lang_NullPointerException());
1377 }
1378 objArrayOop chunk = objArrayOop(backtrace(throwable));
1379 int depth = 0;
1380 if (chunk != NULL) {
1381 // Iterate over chunks and count full ones
1382 while (true) {
1383 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1384 if (next == NULL) break;
1385 depth += trace_chunk_size;
1386 chunk = next;
1387 }
1388 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1389 // Count element in remaining partial chunk
1390 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
1391 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1392 assert(methods != NULL && bcis != NULL, "sanity check");
1393 for (int i = 0; i < methods->length(); i++) {
1394 if (methods->obj_at(i) == NULL) break;
1395 depth++;
1396 }
1397 }
1398 return depth;
1399 }
1402 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1403 if (throwable == NULL) {
1404 THROW_0(vmSymbols::java_lang_NullPointerException());
1405 }
1406 if (index < 0) {
1407 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1408 }
1409 // Compute how many chunks to skip and index into actual chunk
1410 objArrayOop chunk = objArrayOop(backtrace(throwable));
1411 int skip_chunks = index / trace_chunk_size;
1412 int chunk_index = index % trace_chunk_size;
1413 while (chunk != NULL && skip_chunks > 0) {
1414 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1415 skip_chunks--;
1416 }
1417 if (chunk == NULL) {
1418 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1419 }
1420 // Get method,bci from chunk
1421 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
1422 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1423 assert(methods != NULL && bcis != NULL, "sanity check");
1424 methodHandle method(THREAD, methodOop(methods->obj_at(chunk_index)));
1425 int bci = bcis->ushort_at(chunk_index);
1426 // Chunk can be partial full
1427 if (method.is_null()) {
1428 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1429 }
1431 oop element = java_lang_StackTraceElement::create(method, bci, CHECK_0);
1432 return element;
1433 }
1435 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1436 // SystemDictionary::stackTraceElement_klass() will be null for pre-1.4 JDKs
1437 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1439 // Allocate java.lang.StackTraceElement instance
1440 klassOop k = SystemDictionary::stackTraceElement_klass();
1441 assert(k != NULL, "must be loaded in 1.4+");
1442 instanceKlassHandle ik (THREAD, k);
1443 if (ik->should_be_initialized()) {
1444 ik->initialize(CHECK_0);
1445 }
1447 Handle element = ik->allocate_instance_handle(CHECK_0);
1448 // Fill in class name
1449 ResourceMark rm(THREAD);
1450 const char* str = instanceKlass::cast(method->method_holder())->external_name();
1451 oop classname = StringTable::intern((char*) str, CHECK_0);
1452 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1453 // Fill in method name
1454 oop methodname = StringTable::intern(method->name(), CHECK_0);
1455 java_lang_StackTraceElement::set_methodName(element(), methodname);
1456 // Fill in source file name
1457 symbolOop source = instanceKlass::cast(method->method_holder())->source_file_name();
1458 oop filename = StringTable::intern(source, CHECK_0);
1459 java_lang_StackTraceElement::set_fileName(element(), filename);
1460 // File in source line number
1461 int line_number;
1462 if (method->is_native()) {
1463 // Negative value different from -1 below, enabling Java code in
1464 // class java.lang.StackTraceElement to distinguish "native" from
1465 // "no LineNumberTable".
1466 line_number = -2;
1467 } else {
1468 // Returns -1 if no LineNumberTable, and otherwise actual line number
1469 line_number = method->line_number_from_bci(bci);
1470 }
1471 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1473 return element();
1474 }
1477 void java_lang_reflect_AccessibleObject::compute_offsets() {
1478 klassOop k = SystemDictionary::reflect_accessible_object_klass();
1479 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1480 }
1482 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1483 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1484 return (jboolean) reflect->bool_field(override_offset);
1485 }
1487 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1488 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1489 reflect->bool_field_put(override_offset, (int) value);
1490 }
1492 void java_lang_reflect_Method::compute_offsets() {
1493 klassOop k = SystemDictionary::reflect_method_klass();
1494 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1495 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1496 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1497 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1498 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1499 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1500 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1501 // The generic signature and annotations fields are only present in 1.5
1502 signature_offset = -1;
1503 annotations_offset = -1;
1504 parameter_annotations_offset = -1;
1505 annotation_default_offset = -1;
1506 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1507 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1508 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1509 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1510 }
1512 Handle java_lang_reflect_Method::create(TRAPS) {
1513 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1514 klassOop klass = SystemDictionary::reflect_method_klass();
1515 // This class is eagerly initialized during VM initialization, since we keep a refence
1516 // to one of the methods
1517 assert(instanceKlass::cast(klass)->is_initialized(), "must be initialized");
1518 return instanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH);
1519 }
1521 oop java_lang_reflect_Method::clazz(oop reflect) {
1522 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1523 return reflect->obj_field(clazz_offset);
1524 }
1526 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1527 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1528 reflect->obj_field_put(clazz_offset, value);
1529 }
1531 int java_lang_reflect_Method::slot(oop reflect) {
1532 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1533 return reflect->int_field(slot_offset);
1534 }
1536 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1537 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1538 reflect->int_field_put(slot_offset, value);
1539 }
1541 oop java_lang_reflect_Method::name(oop method) {
1542 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1543 return method->obj_field(name_offset);
1544 }
1546 void java_lang_reflect_Method::set_name(oop method, oop value) {
1547 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1548 method->obj_field_put(name_offset, value);
1549 }
1551 oop java_lang_reflect_Method::return_type(oop method) {
1552 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1553 return method->obj_field(returnType_offset);
1554 }
1556 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
1557 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1558 method->obj_field_put(returnType_offset, value);
1559 }
1561 oop java_lang_reflect_Method::parameter_types(oop method) {
1562 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1563 return method->obj_field(parameterTypes_offset);
1564 }
1566 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
1567 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1568 method->obj_field_put(parameterTypes_offset, value);
1569 }
1571 oop java_lang_reflect_Method::exception_types(oop method) {
1572 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1573 return method->obj_field(exceptionTypes_offset);
1574 }
1576 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
1577 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1578 method->obj_field_put(exceptionTypes_offset, value);
1579 }
1581 int java_lang_reflect_Method::modifiers(oop method) {
1582 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1583 return method->int_field(modifiers_offset);
1584 }
1586 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
1587 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1588 method->int_field_put(modifiers_offset, value);
1589 }
1591 bool java_lang_reflect_Method::has_signature_field() {
1592 return (signature_offset >= 0);
1593 }
1595 oop java_lang_reflect_Method::signature(oop method) {
1596 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1597 assert(has_signature_field(), "signature field must be present");
1598 return method->obj_field(signature_offset);
1599 }
1601 void java_lang_reflect_Method::set_signature(oop method, oop value) {
1602 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1603 assert(has_signature_field(), "signature field must be present");
1604 method->obj_field_put(signature_offset, value);
1605 }
1607 bool java_lang_reflect_Method::has_annotations_field() {
1608 return (annotations_offset >= 0);
1609 }
1611 oop java_lang_reflect_Method::annotations(oop method) {
1612 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1613 assert(has_annotations_field(), "annotations field must be present");
1614 return method->obj_field(annotations_offset);
1615 }
1617 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
1618 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1619 assert(has_annotations_field(), "annotations field must be present");
1620 method->obj_field_put(annotations_offset, value);
1621 }
1623 bool java_lang_reflect_Method::has_parameter_annotations_field() {
1624 return (parameter_annotations_offset >= 0);
1625 }
1627 oop java_lang_reflect_Method::parameter_annotations(oop method) {
1628 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1629 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1630 return method->obj_field(parameter_annotations_offset);
1631 }
1633 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
1634 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1635 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1636 method->obj_field_put(parameter_annotations_offset, value);
1637 }
1639 bool java_lang_reflect_Method::has_annotation_default_field() {
1640 return (annotation_default_offset >= 0);
1641 }
1643 oop java_lang_reflect_Method::annotation_default(oop method) {
1644 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1645 assert(has_annotation_default_field(), "annotation default field must be present");
1646 return method->obj_field(annotation_default_offset);
1647 }
1649 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
1650 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1651 assert(has_annotation_default_field(), "annotation default field must be present");
1652 method->obj_field_put(annotation_default_offset, value);
1653 }
1655 void java_lang_reflect_Constructor::compute_offsets() {
1656 klassOop k = SystemDictionary::reflect_constructor_klass();
1657 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1658 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1659 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1660 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1661 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1662 // The generic signature and annotations fields are only present in 1.5
1663 signature_offset = -1;
1664 annotations_offset = -1;
1665 parameter_annotations_offset = -1;
1666 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1667 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1668 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1669 }
1671 Handle java_lang_reflect_Constructor::create(TRAPS) {
1672 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1673 symbolHandle name = vmSymbolHandles::java_lang_reflect_Constructor();
1674 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
1675 instanceKlassHandle klass (THREAD, k);
1676 // Ensure it is initialized
1677 klass->initialize(CHECK_NH);
1678 return klass->allocate_instance_handle(CHECK_NH);
1679 }
1681 oop java_lang_reflect_Constructor::clazz(oop reflect) {
1682 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1683 return reflect->obj_field(clazz_offset);
1684 }
1686 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
1687 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1688 reflect->obj_field_put(clazz_offset, value);
1689 }
1691 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
1692 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1693 return constructor->obj_field(parameterTypes_offset);
1694 }
1696 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
1697 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1698 constructor->obj_field_put(parameterTypes_offset, value);
1699 }
1701 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
1702 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1703 return constructor->obj_field(exceptionTypes_offset);
1704 }
1706 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
1707 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1708 constructor->obj_field_put(exceptionTypes_offset, value);
1709 }
1711 int java_lang_reflect_Constructor::slot(oop reflect) {
1712 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1713 return reflect->int_field(slot_offset);
1714 }
1716 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
1717 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1718 reflect->int_field_put(slot_offset, value);
1719 }
1721 int java_lang_reflect_Constructor::modifiers(oop constructor) {
1722 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1723 return constructor->int_field(modifiers_offset);
1724 }
1726 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
1727 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1728 constructor->int_field_put(modifiers_offset, value);
1729 }
1731 bool java_lang_reflect_Constructor::has_signature_field() {
1732 return (signature_offset >= 0);
1733 }
1735 oop java_lang_reflect_Constructor::signature(oop constructor) {
1736 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1737 assert(has_signature_field(), "signature field must be present");
1738 return constructor->obj_field(signature_offset);
1739 }
1741 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
1742 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1743 assert(has_signature_field(), "signature field must be present");
1744 constructor->obj_field_put(signature_offset, value);
1745 }
1747 bool java_lang_reflect_Constructor::has_annotations_field() {
1748 return (annotations_offset >= 0);
1749 }
1751 oop java_lang_reflect_Constructor::annotations(oop constructor) {
1752 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1753 assert(has_annotations_field(), "annotations field must be present");
1754 return constructor->obj_field(annotations_offset);
1755 }
1757 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
1758 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1759 assert(has_annotations_field(), "annotations field must be present");
1760 constructor->obj_field_put(annotations_offset, value);
1761 }
1763 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
1764 return (parameter_annotations_offset >= 0);
1765 }
1767 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
1768 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1769 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1770 return method->obj_field(parameter_annotations_offset);
1771 }
1773 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
1774 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1775 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1776 method->obj_field_put(parameter_annotations_offset, value);
1777 }
1779 void java_lang_reflect_Field::compute_offsets() {
1780 klassOop k = SystemDictionary::reflect_field_klass();
1781 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1782 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1783 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
1784 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1785 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1786 // The generic signature and annotations fields are only present in 1.5
1787 signature_offset = -1;
1788 annotations_offset = -1;
1789 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1790 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1791 }
1793 Handle java_lang_reflect_Field::create(TRAPS) {
1794 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1795 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field();
1796 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
1797 instanceKlassHandle klass (THREAD, k);
1798 // Ensure it is initialized
1799 klass->initialize(CHECK_NH);
1800 return klass->allocate_instance_handle(CHECK_NH);
1801 }
1803 oop java_lang_reflect_Field::clazz(oop reflect) {
1804 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1805 return reflect->obj_field(clazz_offset);
1806 }
1808 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
1809 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1810 reflect->obj_field_put(clazz_offset, value);
1811 }
1813 oop java_lang_reflect_Field::name(oop field) {
1814 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1815 return field->obj_field(name_offset);
1816 }
1818 void java_lang_reflect_Field::set_name(oop field, oop value) {
1819 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1820 field->obj_field_put(name_offset, value);
1821 }
1823 oop java_lang_reflect_Field::type(oop field) {
1824 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1825 return field->obj_field(type_offset);
1826 }
1828 void java_lang_reflect_Field::set_type(oop field, oop value) {
1829 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1830 field->obj_field_put(type_offset, value);
1831 }
1833 int java_lang_reflect_Field::slot(oop reflect) {
1834 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1835 return reflect->int_field(slot_offset);
1836 }
1838 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
1839 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1840 reflect->int_field_put(slot_offset, value);
1841 }
1843 int java_lang_reflect_Field::modifiers(oop field) {
1844 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1845 return field->int_field(modifiers_offset);
1846 }
1848 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
1849 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1850 field->int_field_put(modifiers_offset, value);
1851 }
1853 bool java_lang_reflect_Field::has_signature_field() {
1854 return (signature_offset >= 0);
1855 }
1857 oop java_lang_reflect_Field::signature(oop field) {
1858 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1859 assert(has_signature_field(), "signature field must be present");
1860 return field->obj_field(signature_offset);
1861 }
1863 void java_lang_reflect_Field::set_signature(oop field, oop value) {
1864 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1865 assert(has_signature_field(), "signature field must be present");
1866 field->obj_field_put(signature_offset, value);
1867 }
1869 bool java_lang_reflect_Field::has_annotations_field() {
1870 return (annotations_offset >= 0);
1871 }
1873 oop java_lang_reflect_Field::annotations(oop field) {
1874 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1875 assert(has_annotations_field(), "annotations field must be present");
1876 return field->obj_field(annotations_offset);
1877 }
1879 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
1880 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1881 assert(has_annotations_field(), "annotations field must be present");
1882 field->obj_field_put(annotations_offset, value);
1883 }
1886 void sun_reflect_ConstantPool::compute_offsets() {
1887 klassOop k = SystemDictionary::reflect_constant_pool_klass();
1888 // This null test can be removed post beta
1889 if (k != NULL) {
1890 compute_offset(_cp_oop_offset, k, vmSymbols::constantPoolOop_name(), vmSymbols::object_signature());
1891 }
1892 }
1895 Handle sun_reflect_ConstantPool::create(TRAPS) {
1896 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1897 klassOop k = SystemDictionary::reflect_constant_pool_klass();
1898 instanceKlassHandle klass (THREAD, k);
1899 // Ensure it is initialized
1900 klass->initialize(CHECK_NH);
1901 return klass->allocate_instance_handle(CHECK_NH);
1902 }
1905 oop sun_reflect_ConstantPool::cp_oop(oop reflect) {
1906 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1907 return reflect->obj_field(_cp_oop_offset);
1908 }
1911 void sun_reflect_ConstantPool::set_cp_oop(oop reflect, oop value) {
1912 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1913 reflect->obj_field_put(_cp_oop_offset, value);
1914 }
1916 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
1917 klassOop k = SystemDictionary::reflect_unsafe_static_field_accessor_impl_klass();
1918 // This null test can be removed post beta
1919 if (k != NULL) {
1920 compute_offset(_base_offset, k,
1921 vmSymbols::base_name(), vmSymbols::object_signature());
1922 }
1923 }
1925 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
1926 klassOop k = SystemDictionary::box_klass(type);
1927 if (k == NULL) return NULL;
1928 instanceKlassHandle h (THREAD, k);
1929 if (!h->is_initialized()) h->initialize(CHECK_0);
1930 return h->allocate_instance(THREAD);
1931 }
1934 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
1935 oop box = initialize_and_allocate(type, CHECK_0);
1936 if (box == NULL) return NULL;
1937 switch (type) {
1938 case T_BOOLEAN:
1939 box->bool_field_put(value_offset, value->z);
1940 break;
1941 case T_CHAR:
1942 box->char_field_put(value_offset, value->c);
1943 break;
1944 case T_FLOAT:
1945 box->float_field_put(value_offset, value->f);
1946 break;
1947 case T_DOUBLE:
1948 box->double_field_put(long_value_offset, value->d);
1949 break;
1950 case T_BYTE:
1951 box->byte_field_put(value_offset, value->b);
1952 break;
1953 case T_SHORT:
1954 box->short_field_put(value_offset, value->s);
1955 break;
1956 case T_INT:
1957 box->int_field_put(value_offset, value->i);
1958 break;
1959 case T_LONG:
1960 box->long_field_put(long_value_offset, value->j);
1961 break;
1962 default:
1963 return NULL;
1964 }
1965 return box;
1966 }
1969 BasicType java_lang_boxing_object::basic_type(oop box) {
1970 if (box == NULL) return T_ILLEGAL;
1971 BasicType type = SystemDictionary::box_klass_type(box->klass());
1972 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
1973 return T_ILLEGAL;
1974 return type;
1975 }
1978 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
1979 BasicType type = SystemDictionary::box_klass_type(box->klass());
1980 switch (type) {
1981 case T_BOOLEAN:
1982 value->z = box->bool_field(value_offset);
1983 break;
1984 case T_CHAR:
1985 value->c = box->char_field(value_offset);
1986 break;
1987 case T_FLOAT:
1988 value->f = box->float_field(value_offset);
1989 break;
1990 case T_DOUBLE:
1991 value->d = box->double_field(long_value_offset);
1992 break;
1993 case T_BYTE:
1994 value->b = box->byte_field(value_offset);
1995 break;
1996 case T_SHORT:
1997 value->s = box->short_field(value_offset);
1998 break;
1999 case T_INT:
2000 value->i = box->int_field(value_offset);
2001 break;
2002 case T_LONG:
2003 value->j = box->long_field(long_value_offset);
2004 break;
2005 default:
2006 return T_ILLEGAL;
2007 } // end switch
2008 return type;
2009 }
2012 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2013 BasicType type = SystemDictionary::box_klass_type(box->klass());
2014 switch (type) {
2015 case T_BOOLEAN:
2016 box->bool_field_put(value_offset, value->z);
2017 break;
2018 case T_CHAR:
2019 box->char_field_put(value_offset, value->c);
2020 break;
2021 case T_FLOAT:
2022 box->float_field_put(value_offset, value->f);
2023 break;
2024 case T_DOUBLE:
2025 box->double_field_put(long_value_offset, value->d);
2026 break;
2027 case T_BYTE:
2028 box->byte_field_put(value_offset, value->b);
2029 break;
2030 case T_SHORT:
2031 box->short_field_put(value_offset, value->s);
2032 break;
2033 case T_INT:
2034 box->int_field_put(value_offset, value->i);
2035 break;
2036 case T_LONG:
2037 box->long_field_put(long_value_offset, value->j);
2038 break;
2039 default:
2040 return T_ILLEGAL;
2041 } // end switch
2042 return type;
2043 }
2046 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2047 switch (type) {
2048 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2049 case T_CHAR: st->print("%d", value->c); break;
2050 case T_BYTE: st->print("%d", value->b); break;
2051 case T_SHORT: st->print("%d", value->s); break;
2052 case T_INT: st->print("%d", value->i); break;
2053 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2054 case T_FLOAT: st->print("%f", value->f); break;
2055 case T_DOUBLE: st->print("%lf", value->d); break;
2056 default: st->print("type %d?", type); break;
2057 }
2058 }
2061 // Support for java_lang_ref_Reference
2062 oop java_lang_ref_Reference::pending_list_lock() {
2063 instanceKlass* ik = instanceKlass::cast(SystemDictionary::reference_klass());
2064 char *addr = (((char *)ik->start_of_static_fields()) + static_lock_offset);
2065 if (UseCompressedOops) {
2066 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2067 } else {
2068 return oopDesc::load_decode_heap_oop((oop*)addr);
2069 }
2070 }
2072 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2073 instanceKlass* ik = instanceKlass::cast(SystemDictionary::reference_klass());
2074 char *addr = (((char *)ik->start_of_static_fields()) + static_pending_offset);
2075 // XXX This might not be HeapWord aligned, almost rather be char *.
2076 return (HeapWord*)addr;
2077 }
2079 oop java_lang_ref_Reference::pending_list() {
2080 char *addr = (char *)pending_list_addr();
2081 if (UseCompressedOops) {
2082 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2083 } else {
2084 return oopDesc::load_decode_heap_oop((oop*)addr);
2085 }
2086 }
2089 // Support for java_lang_ref_SoftReference
2091 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2092 return ref->long_field(timestamp_offset);
2093 }
2095 jlong java_lang_ref_SoftReference::clock() {
2096 instanceKlass* ik = instanceKlass::cast(SystemDictionary::soft_reference_klass());
2097 int offset = ik->offset_of_static_fields() + static_clock_offset;
2099 return SystemDictionary::soft_reference_klass()->long_field(offset);
2100 }
2102 void java_lang_ref_SoftReference::set_clock(jlong value) {
2103 instanceKlass* ik = instanceKlass::cast(SystemDictionary::soft_reference_klass());
2104 int offset = ik->offset_of_static_fields() + static_clock_offset;
2106 SystemDictionary::soft_reference_klass()->long_field_put(offset, value);
2107 }
2110 // Support for java_security_AccessControlContext
2112 int java_security_AccessControlContext::_context_offset = 0;
2113 int java_security_AccessControlContext::_privilegedContext_offset = 0;
2114 int java_security_AccessControlContext::_isPrivileged_offset = 0;
2117 void java_security_AccessControlContext::compute_offsets() {
2118 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
2119 fieldDescriptor fd;
2120 instanceKlass* ik = instanceKlass::cast(SystemDictionary::AccessControlContext_klass());
2122 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
2123 fatal("Invalid layout of java.security.AccessControlContext");
2124 }
2125 _context_offset = fd.offset();
2127 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
2128 fatal("Invalid layout of java.security.AccessControlContext");
2129 }
2130 _privilegedContext_offset = fd.offset();
2132 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
2133 fatal("Invalid layout of java.security.AccessControlContext");
2134 }
2135 _isPrivileged_offset = fd.offset();
2136 }
2139 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
2140 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
2141 // Ensure klass is initialized
2142 instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
2143 // Allocate result
2144 oop result = instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
2145 // Fill in values
2146 result->obj_field_put(_context_offset, context());
2147 result->obj_field_put(_privilegedContext_offset, privileged_context());
2148 result->bool_field_put(_isPrivileged_offset, isPrivileged);
2149 return result;
2150 }
2153 // Support for java_lang_ClassLoader
2155 oop java_lang_ClassLoader::parent(oop loader) {
2156 assert(loader->is_oop(), "loader must be oop");
2157 return loader->obj_field(parent_offset);
2158 }
2161 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
2162 // Fix for 4474172; see evaluation for more details
2163 loader = non_reflection_class_loader(loader);
2165 oop cl = SystemDictionary::java_system_loader();
2166 while(cl != NULL) {
2167 if (cl == loader) return true;
2168 cl = parent(cl);
2169 }
2170 return false;
2171 }
2173 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
2174 if (loader != NULL) {
2175 // See whether this is one of the class loaders associated with
2176 // the generated bytecodes for reflection, and if so, "magically"
2177 // delegate to its parent to prevent class loading from occurring
2178 // in places where applications using reflection didn't expect it.
2179 klassOop delegating_cl_class = SystemDictionary::reflect_delegating_classloader_klass();
2180 // This might be null in non-1.4 JDKs
2181 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
2182 return parent(loader);
2183 }
2184 }
2185 return loader;
2186 }
2189 // Support for java_lang_System
2191 void java_lang_System::compute_offsets() {
2192 assert(offset_of_static_fields == 0, "offsets should be initialized only once");
2194 instanceKlass* ik = instanceKlass::cast(SystemDictionary::system_klass());
2195 offset_of_static_fields = ik->offset_of_static_fields();
2196 }
2198 int java_lang_System::in_offset_in_bytes() {
2199 return (offset_of_static_fields + static_in_offset);
2200 }
2203 int java_lang_System::out_offset_in_bytes() {
2204 return (offset_of_static_fields + static_out_offset);
2205 }
2208 int java_lang_System::err_offset_in_bytes() {
2209 return (offset_of_static_fields + static_err_offset);
2210 }
2214 int java_lang_String::value_offset;
2215 int java_lang_String::offset_offset;
2216 int java_lang_String::count_offset;
2217 int java_lang_String::hash_offset;
2218 int java_lang_Class::klass_offset;
2219 int java_lang_Class::array_klass_offset;
2220 int java_lang_Class::resolved_constructor_offset;
2221 int java_lang_Class::number_of_fake_oop_fields;
2222 int java_lang_Throwable::backtrace_offset;
2223 int java_lang_Throwable::detailMessage_offset;
2224 int java_lang_Throwable::cause_offset;
2225 int java_lang_Throwable::stackTrace_offset;
2226 int java_lang_reflect_AccessibleObject::override_offset;
2227 int java_lang_reflect_Method::clazz_offset;
2228 int java_lang_reflect_Method::name_offset;
2229 int java_lang_reflect_Method::returnType_offset;
2230 int java_lang_reflect_Method::parameterTypes_offset;
2231 int java_lang_reflect_Method::exceptionTypes_offset;
2232 int java_lang_reflect_Method::slot_offset;
2233 int java_lang_reflect_Method::modifiers_offset;
2234 int java_lang_reflect_Method::signature_offset;
2235 int java_lang_reflect_Method::annotations_offset;
2236 int java_lang_reflect_Method::parameter_annotations_offset;
2237 int java_lang_reflect_Method::annotation_default_offset;
2238 int java_lang_reflect_Constructor::clazz_offset;
2239 int java_lang_reflect_Constructor::parameterTypes_offset;
2240 int java_lang_reflect_Constructor::exceptionTypes_offset;
2241 int java_lang_reflect_Constructor::slot_offset;
2242 int java_lang_reflect_Constructor::modifiers_offset;
2243 int java_lang_reflect_Constructor::signature_offset;
2244 int java_lang_reflect_Constructor::annotations_offset;
2245 int java_lang_reflect_Constructor::parameter_annotations_offset;
2246 int java_lang_reflect_Field::clazz_offset;
2247 int java_lang_reflect_Field::name_offset;
2248 int java_lang_reflect_Field::type_offset;
2249 int java_lang_reflect_Field::slot_offset;
2250 int java_lang_reflect_Field::modifiers_offset;
2251 int java_lang_reflect_Field::signature_offset;
2252 int java_lang_reflect_Field::annotations_offset;
2253 int java_lang_boxing_object::value_offset;
2254 int java_lang_boxing_object::long_value_offset;
2255 int java_lang_ref_Reference::referent_offset;
2256 int java_lang_ref_Reference::queue_offset;
2257 int java_lang_ref_Reference::next_offset;
2258 int java_lang_ref_Reference::discovered_offset;
2259 int java_lang_ref_Reference::static_lock_offset;
2260 int java_lang_ref_Reference::static_pending_offset;
2261 int java_lang_ref_Reference::number_of_fake_oop_fields;
2262 int java_lang_ref_SoftReference::timestamp_offset;
2263 int java_lang_ref_SoftReference::static_clock_offset;
2264 int java_lang_ClassLoader::parent_offset;
2265 int java_lang_System::offset_of_static_fields;
2266 int java_lang_System::static_in_offset;
2267 int java_lang_System::static_out_offset;
2268 int java_lang_System::static_err_offset;
2269 int java_lang_StackTraceElement::declaringClass_offset;
2270 int java_lang_StackTraceElement::methodName_offset;
2271 int java_lang_StackTraceElement::fileName_offset;
2272 int java_lang_StackTraceElement::lineNumber_offset;
2273 int java_lang_AssertionStatusDirectives::classes_offset;
2274 int java_lang_AssertionStatusDirectives::classEnabled_offset;
2275 int java_lang_AssertionStatusDirectives::packages_offset;
2276 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
2277 int java_lang_AssertionStatusDirectives::deflt_offset;
2278 int java_nio_Buffer::_limit_offset;
2279 int sun_misc_AtomicLongCSImpl::_value_offset;
2280 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
2281 int sun_reflect_ConstantPool::_cp_oop_offset;
2282 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
2285 // Support for java_lang_StackTraceElement
2287 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
2288 element->obj_field_put(fileName_offset, value);
2289 }
2291 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
2292 element->obj_field_put(declaringClass_offset, value);
2293 }
2295 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
2296 element->obj_field_put(methodName_offset, value);
2297 }
2299 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
2300 element->int_field_put(lineNumber_offset, value);
2301 }
2304 // Support for java Assertions - java_lang_AssertionStatusDirectives.
2306 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
2307 o->obj_field_put(classes_offset, val);
2308 }
2310 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
2311 o->obj_field_put(classEnabled_offset, val);
2312 }
2314 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
2315 o->obj_field_put(packages_offset, val);
2316 }
2318 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
2319 o->obj_field_put(packageEnabled_offset, val);
2320 }
2322 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
2323 o->bool_field_put(deflt_offset, val);
2324 }
2327 // Support for intrinsification of java.nio.Buffer.checkIndex
2328 int java_nio_Buffer::limit_offset() {
2329 return _limit_offset;
2330 }
2333 void java_nio_Buffer::compute_offsets() {
2334 klassOop k = SystemDictionary::java_nio_Buffer_klass();
2335 assert(k != NULL, "must be loaded in 1.4+");
2336 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
2337 }
2339 // Support for intrinsification of sun.misc.AtomicLongCSImpl.attemptUpdate
2340 int sun_misc_AtomicLongCSImpl::value_offset() {
2341 assert(SystemDictionary::sun_misc_AtomicLongCSImpl_klass() != NULL, "can't call this");
2342 return _value_offset;
2343 }
2346 void sun_misc_AtomicLongCSImpl::compute_offsets() {
2347 klassOop k = SystemDictionary::sun_misc_AtomicLongCSImpl_klass();
2348 // If this class is not present, its value field offset won't be referenced.
2349 if (k != NULL) {
2350 compute_offset(_value_offset, k, vmSymbols::value_name(), vmSymbols::long_signature());
2351 }
2352 }
2354 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
2355 if (_owner_offset != 0) return;
2357 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
2358 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
2359 klassOop k = SystemDictionary::abstract_ownable_synchronizer_klass();
2360 compute_offset(_owner_offset, k,
2361 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
2362 }
2364 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
2365 assert(_owner_offset != 0, "Must be initialized");
2366 return obj->obj_field(_owner_offset);
2367 }
2369 // Compute hard-coded offsets
2370 // Invoked before SystemDictionary::initialize, so pre-loaded classes
2371 // are not available to determine the offset_of_static_fields.
2372 void JavaClasses::compute_hard_coded_offsets() {
2373 const int x = heapOopSize;
2374 const int header = instanceOopDesc::base_offset_in_bytes();
2376 // Do the String Class
2377 java_lang_String::value_offset = java_lang_String::hc_value_offset * x + header;
2378 java_lang_String::offset_offset = java_lang_String::hc_offset_offset * x + header;
2379 java_lang_String::count_offset = java_lang_String::offset_offset + sizeof (jint);
2380 java_lang_String::hash_offset = java_lang_String::count_offset + sizeof (jint);
2382 // Do the Class Class
2383 java_lang_Class::klass_offset = java_lang_Class::hc_klass_offset * x + header;
2384 java_lang_Class::array_klass_offset = java_lang_Class::hc_array_klass_offset * x + header;
2385 java_lang_Class::resolved_constructor_offset = java_lang_Class::hc_resolved_constructor_offset * x + header;
2387 // This is NOT an offset
2388 java_lang_Class::number_of_fake_oop_fields = java_lang_Class::hc_number_of_fake_oop_fields;
2390 // Throwable Class
2391 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
2392 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
2393 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
2394 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
2396 // java_lang_boxing_object
2397 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
2398 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
2400 // java_lang_ref_Reference:
2401 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
2402 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
2403 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
2404 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
2405 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
2406 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
2407 // Artificial fields for java_lang_ref_Reference
2408 // The first field is for the discovered field added in 1.4
2409 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
2411 // java_lang_ref_SoftReference Class
2412 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
2413 // Don't multiply static fields because they are always in wordSize units
2414 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
2416 // java_lang_ClassLoader
2417 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
2419 // java_lang_System
2420 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
2421 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
2422 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
2424 // java_lang_StackTraceElement
2425 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
2426 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
2427 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
2428 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
2429 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
2430 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
2431 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
2432 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
2433 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
2435 }
2438 // Compute non-hard-coded field offsets of all the classes in this file
2439 void JavaClasses::compute_offsets() {
2441 java_lang_Class::compute_offsets();
2442 java_lang_System::compute_offsets();
2443 java_lang_Thread::compute_offsets();
2444 java_lang_ThreadGroup::compute_offsets();
2445 java_security_AccessControlContext::compute_offsets();
2446 // Initialize reflection classes. The layouts of these classes
2447 // changed with the new reflection implementation in JDK 1.4, and
2448 // since the Universe doesn't know what JDK version it is until this
2449 // point we defer computation of these offsets until now.
2450 java_lang_reflect_AccessibleObject::compute_offsets();
2451 java_lang_reflect_Method::compute_offsets();
2452 java_lang_reflect_Constructor::compute_offsets();
2453 java_lang_reflect_Field::compute_offsets();
2454 if (JDK_Version::is_gte_jdk14x_version()) {
2455 java_nio_Buffer::compute_offsets();
2456 }
2457 if (JDK_Version::is_gte_jdk15x_version()) {
2458 sun_reflect_ConstantPool::compute_offsets();
2459 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
2460 }
2461 sun_misc_AtomicLongCSImpl::compute_offsets();
2462 }
2464 #ifndef PRODUCT
2466 // These functions exist to assert the validity of hard-coded field offsets to guard
2467 // against changes in the class files
2469 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
2470 EXCEPTION_MARK;
2471 fieldDescriptor fd;
2472 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH);
2473 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
2474 instanceKlassHandle h_klass (THREAD, k);
2475 //instanceKlassHandle h_klass(klass);
2476 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH);
2477 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH);
2478 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) {
2479 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
2480 return false;
2481 }
2482 if (fd.is_static()) {
2483 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
2484 return false;
2485 }
2486 if (fd.offset() == hardcoded_offset ) {
2487 return true;
2488 } else {
2489 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
2490 klass_name, field_name, hardcoded_offset, fd.offset());
2491 return false;
2492 }
2493 }
2496 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
2497 EXCEPTION_MARK;
2498 fieldDescriptor fd;
2499 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH);
2500 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
2501 instanceKlassHandle h_klass (THREAD, k);
2502 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH);
2503 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH);
2504 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) {
2505 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
2506 return false;
2507 }
2508 if (!fd.is_static()) {
2509 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
2510 return false;
2511 }
2512 if (fd.offset() == hardcoded_offset + h_klass->offset_of_static_fields()) {
2513 return true;
2514 } else {
2515 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());
2516 return false;
2517 }
2518 }
2521 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
2522 EXCEPTION_MARK;
2523 fieldDescriptor fd;
2524 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH);
2525 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
2526 instanceKlassHandle h_klass (THREAD, k);
2527 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH);
2528 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH);
2529 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) {
2530 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
2531 return false;
2532 }
2533 if (!fd.is_static() || !fd.has_initial_value()) {
2534 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
2535 return false;
2536 }
2537 if (!fd.initial_value_tag().is_int()) {
2538 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
2539 return false;
2540 }
2541 jint field_value = fd.int_initial_value();
2542 if (field_value == hardcoded_constant) {
2543 return true;
2544 } else {
2545 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);
2546 return false;
2547 }
2548 }
2551 // Check the hard-coded field offsets of all the classes in this file
2553 void JavaClasses::check_offsets() {
2554 bool valid = true;
2556 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
2557 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
2559 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
2560 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
2562 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
2563 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
2565 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
2566 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
2568 // java.lang.String
2570 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
2571 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
2572 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
2573 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
2575 // java.lang.Class
2577 // Fake fields
2578 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
2579 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
2580 // CHECK_OFFSET("java/lang/Class", java_lang_Class, resolved_constructor); // %%% this needs to be checked
2582 // java.lang.Throwable
2584 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
2585 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
2586 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
2587 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
2589 // Boxed primitive objects (java_lang_boxing_object)
2591 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
2592 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
2593 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
2594 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
2595 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
2596 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
2597 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
2598 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
2600 // java.lang.ClassLoader
2602 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
2604 // java.lang.System
2606 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
2607 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
2608 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
2610 // java.lang.StackTraceElement
2612 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
2613 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
2614 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
2615 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
2617 // java.lang.ref.Reference
2619 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
2620 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
2621 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
2622 // Fake field
2623 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
2624 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
2625 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
2627 // java.lang.ref.SoftReference
2629 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
2630 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
2632 // java.lang.AssertionStatusDirectives
2633 //
2634 // The CheckAssertionStatusDirectives boolean can be removed from here and
2635 // globals.hpp after the AssertionStatusDirectives class has been integrated
2636 // into merlin "for some time." Without it, the vm will fail with early
2637 // merlin builds.
2639 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) {
2640 const char* nm = "java/lang/AssertionStatusDirectives";
2641 const char* sig = "[Ljava/lang/String;";
2642 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
2643 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
2644 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
2645 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
2646 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
2647 }
2649 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
2650 }
2652 #endif // PRODUCT
2654 void javaClasses_init() {
2655 JavaClasses::compute_offsets();
2656 JavaClasses::check_offsets();
2657 FilteredFieldsMap::initialize(); // must be done after computing offsets.
2658 }