Thu, 31 Mar 2011 14:00:41 -0700
7032129: Native memory usage grow unexpectedly for vm/oom/*InternedString tests
Reviewed-by: kvn, kamg, jcoomes
1 /*
2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
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23 */
25 #include "precompiled.hpp"
26 #include "classfile/javaClasses.hpp"
27 #include "classfile/symbolTable.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "code/debugInfo.hpp"
30 #include "code/pcDesc.hpp"
31 #include "interpreter/interpreter.hpp"
32 #include "memory/oopFactory.hpp"
33 #include "memory/resourceArea.hpp"
34 #include "memory/universe.inline.hpp"
35 #include "oops/instanceKlass.hpp"
36 #include "oops/instanceMirrorKlass.hpp"
37 #include "oops/klass.hpp"
38 #include "oops/klassOop.hpp"
39 #include "oops/methodOop.hpp"
40 #include "oops/symbol.hpp"
41 #include "oops/typeArrayOop.hpp"
42 #include "runtime/fieldDescriptor.hpp"
43 #include "runtime/handles.inline.hpp"
44 #include "runtime/interfaceSupport.hpp"
45 #include "runtime/java.hpp"
46 #include "runtime/javaCalls.hpp"
47 #include "runtime/safepoint.hpp"
48 #include "runtime/vframe.hpp"
49 #include "utilities/preserveException.hpp"
50 #ifdef TARGET_OS_FAMILY_linux
51 # include "thread_linux.inline.hpp"
52 #endif
53 #ifdef TARGET_OS_FAMILY_solaris
54 # include "thread_solaris.inline.hpp"
55 #endif
56 #ifdef TARGET_OS_FAMILY_windows
57 # include "thread_windows.inline.hpp"
58 #endif
60 static bool find_field(instanceKlass* ik,
61 Symbol* name_symbol, Symbol* signature_symbol,
62 fieldDescriptor* fd,
63 bool allow_super = false) {
64 if (allow_super)
65 return ik->find_field(name_symbol, signature_symbol, fd) != NULL;
66 else
67 return ik->find_local_field(name_symbol, signature_symbol, fd);
68 }
70 static bool find_hacked_field(instanceKlass* ik,
71 Symbol* name_symbol, Symbol* signature_symbol,
72 fieldDescriptor* fd,
73 bool allow_super = false) {
74 bool found = find_field(ik, name_symbol, signature_symbol, fd, allow_super);
75 if (!found && AllowTransitionalJSR292) {
76 Symbol* backup_sig = SystemDictionary::find_backup_signature(signature_symbol);
77 if (backup_sig != NULL) {
78 found = find_field(ik, name_symbol, backup_sig, fd, allow_super);
79 if (TraceMethodHandles) {
80 ResourceMark rm;
81 tty->print_cr("MethodHandles: %s.%s: backup for %s => %s%s",
82 ik->name()->as_C_string(), name_symbol->as_C_string(),
83 signature_symbol->as_C_string(), backup_sig->as_C_string(),
84 (found ? "" : " (NOT FOUND)"));
85 }
86 }
87 }
88 return found;
89 }
90 #define find_field find_hacked_field /* remove after AllowTransitionalJSR292 */
92 // Helpful routine for computing field offsets at run time rather than hardcoding them
93 static void
94 compute_offset(int &dest_offset,
95 klassOop klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
96 bool allow_super = false) {
97 fieldDescriptor fd;
98 instanceKlass* ik = instanceKlass::cast(klass_oop);
99 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
100 ResourceMark rm;
101 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
102 fatal("Invalid layout of preloaded class");
103 }
104 dest_offset = fd.offset();
105 }
107 // Same as above but for "optional" offsets that might not be present in certain JDK versions
108 static void
109 compute_optional_offset(int& dest_offset,
110 klassOop klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
111 bool allow_super = false) {
112 fieldDescriptor fd;
113 instanceKlass* ik = instanceKlass::cast(klass_oop);
114 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
115 dest_offset = fd.offset();
116 }
117 }
120 Handle java_lang_String::basic_create(int length, bool tenured, TRAPS) {
121 // Create the String object first, so there's a chance that the String
122 // and the char array it points to end up in the same cache line.
123 oop obj;
124 if (tenured) {
125 obj = instanceKlass::cast(SystemDictionary::String_klass())->allocate_permanent_instance(CHECK_NH);
126 } else {
127 obj = instanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH);
128 }
130 // Create the char array. The String object must be handlized here
131 // because GC can happen as a result of the allocation attempt.
132 Handle h_obj(THREAD, obj);
133 typeArrayOop buffer;
134 if (tenured) {
135 buffer = oopFactory::new_permanent_charArray(length, CHECK_NH);
136 } else {
137 buffer = oopFactory::new_charArray(length, CHECK_NH);
138 }
140 // Point the String at the char array
141 obj = h_obj();
142 set_value(obj, buffer);
143 // No need to zero the offset, allocation zero'ed the entire String object
144 assert(offset(obj) == 0, "initial String offset should be zero");
145 //set_offset(obj, 0);
146 set_count(obj, length);
148 return h_obj;
149 }
151 Handle java_lang_String::basic_create_from_unicode(jchar* unicode, int length, bool tenured, TRAPS) {
152 Handle h_obj = basic_create(length, tenured, CHECK_NH);
153 typeArrayOop buffer = value(h_obj());
154 for (int index = 0; index < length; index++) {
155 buffer->char_at_put(index, unicode[index]);
156 }
157 return h_obj;
158 }
160 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
161 return basic_create_from_unicode(unicode, length, false, CHECK_NH);
162 }
164 Handle java_lang_String::create_tenured_from_unicode(jchar* unicode, int length, TRAPS) {
165 return basic_create_from_unicode(unicode, length, JavaObjectsInPerm, CHECK_NH);
166 }
168 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
169 Handle h_obj = basic_create_from_unicode(unicode, length, false, CHECK_0);
170 return h_obj();
171 }
173 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
174 if (utf8_str == NULL) {
175 return Handle();
176 }
177 int length = UTF8::unicode_length(utf8_str);
178 Handle h_obj = basic_create(length, false, CHECK_NH);
179 if (length > 0) {
180 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
181 }
182 return h_obj;
183 }
185 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
186 Handle h_obj = create_from_str(utf8_str, CHECK_0);
187 return h_obj();
188 }
190 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
191 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
192 Handle h_obj = basic_create(length, false, CHECK_NH);
193 if (length > 0) {
194 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
195 }
196 return h_obj;
197 }
199 // Converts a C string to a Java String based on current encoding
200 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
201 assert(str != NULL, "bad arguments");
203 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
204 static to_java_string_fn_t _to_java_string_fn = NULL;
206 if (_to_java_string_fn == NULL) {
207 void *lib_handle = os::native_java_library();
208 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
209 if (_to_java_string_fn == NULL) {
210 fatal("NewStringPlatform missing");
211 }
212 }
214 jstring js = NULL;
215 { JavaThread* thread = (JavaThread*)THREAD;
216 assert(thread->is_Java_thread(), "must be java thread");
217 HandleMark hm(thread);
218 ThreadToNativeFromVM ttn(thread);
219 js = (_to_java_string_fn)(thread->jni_environment(), str);
220 }
221 return Handle(THREAD, JNIHandles::resolve(js));
222 }
224 // Converts a Java String to a native C string that can be used for
225 // native OS calls.
226 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
228 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
229 static to_platform_string_fn_t _to_platform_string_fn = NULL;
231 if (_to_platform_string_fn == NULL) {
232 void *lib_handle = os::native_java_library();
233 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
234 if (_to_platform_string_fn == NULL) {
235 fatal("GetStringPlatformChars missing");
236 }
237 }
239 char *native_platform_string;
240 { JavaThread* thread = (JavaThread*)THREAD;
241 assert(thread->is_Java_thread(), "must be java thread");
242 JNIEnv *env = thread->jni_environment();
243 jstring js = (jstring) JNIHandles::make_local(env, java_string());
244 bool is_copy;
245 HandleMark hm(thread);
246 ThreadToNativeFromVM ttn(thread);
247 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
248 assert(is_copy == JNI_TRUE, "is_copy value changed");
249 JNIHandles::destroy_local(js);
250 }
251 return native_platform_string;
252 }
254 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
255 oop obj = java_string();
256 // Typical usage is to convert all '/' to '.' in string.
257 typeArrayOop value = java_lang_String::value(obj);
258 int offset = java_lang_String::offset(obj);
259 int length = java_lang_String::length(obj);
261 // First check if any from_char exist
262 int index; // Declared outside, used later
263 for (index = 0; index < length; index++) {
264 if (value->char_at(index + offset) == from_char) {
265 break;
266 }
267 }
268 if (index == length) {
269 // No from_char, so do not copy.
270 return java_string;
271 }
273 // Create new UNICODE buffer. Must handlize value because GC
274 // may happen during String and char array creation.
275 typeArrayHandle h_value(THREAD, value);
276 Handle string = basic_create(length, false, CHECK_NH);
278 typeArrayOop from_buffer = h_value();
279 typeArrayOop to_buffer = java_lang_String::value(string());
281 // Copy contents
282 for (index = 0; index < length; index++) {
283 jchar c = from_buffer->char_at(index + offset);
284 if (c == from_char) {
285 c = to_char;
286 }
287 to_buffer->char_at_put(index, c);
288 }
289 return string;
290 }
292 jchar* java_lang_String::as_unicode_string(oop java_string, int& length) {
293 typeArrayOop value = java_lang_String::value(java_string);
294 int offset = java_lang_String::offset(java_string);
295 length = java_lang_String::length(java_string);
297 jchar* result = NEW_RESOURCE_ARRAY(jchar, length);
298 for (int index = 0; index < length; index++) {
299 result[index] = value->char_at(index + offset);
300 }
301 return result;
302 }
304 unsigned int java_lang_String::hash_string(oop java_string) {
305 typeArrayOop value = java_lang_String::value(java_string);
306 int offset = java_lang_String::offset(java_string);
307 int length = java_lang_String::length(java_string);
309 if (length == 0) return 0;
310 return hash_string(value->char_at_addr(offset), length);
311 }
313 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {
314 oop obj = java_string();
315 typeArrayOop value = java_lang_String::value(obj);
316 int offset = java_lang_String::offset(obj);
317 int length = java_lang_String::length(obj);
318 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
319 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
320 return sym;
321 }
323 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
324 typeArrayOop value = java_lang_String::value(java_string);
325 int offset = java_lang_String::offset(java_string);
326 int length = java_lang_String::length(java_string);
327 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
328 return SymbolTable::probe_unicode(base, length);
329 }
332 int java_lang_String::utf8_length(oop java_string) {
333 typeArrayOop value = java_lang_String::value(java_string);
334 int offset = java_lang_String::offset(java_string);
335 int length = java_lang_String::length(java_string);
336 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
337 return UNICODE::utf8_length(position, length);
338 }
340 char* java_lang_String::as_utf8_string(oop java_string) {
341 typeArrayOop value = java_lang_String::value(java_string);
342 int offset = java_lang_String::offset(java_string);
343 int length = java_lang_String::length(java_string);
344 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
345 return UNICODE::as_utf8(position, length);
346 }
348 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
349 typeArrayOop value = java_lang_String::value(java_string);
350 int offset = java_lang_String::offset(java_string);
351 int length = java_lang_String::length(java_string);
352 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
353 return UNICODE::as_utf8(position, length, buf, buflen);
354 }
356 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
357 typeArrayOop value = java_lang_String::value(java_string);
358 int offset = java_lang_String::offset(java_string);
359 int length = java_lang_String::length(java_string);
360 assert(start + len <= length, "just checking");
361 jchar* position = value->char_at_addr(offset + start);
362 return UNICODE::as_utf8(position, len);
363 }
365 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
366 assert(SharedSkipVerify ||
367 java_string->klass() == SystemDictionary::String_klass(),
368 "must be java_string");
369 typeArrayOop value = java_lang_String::value(java_string);
370 int offset = java_lang_String::offset(java_string);
371 int length = java_lang_String::length(java_string);
372 if (length != len) {
373 return false;
374 }
375 for (int i = 0; i < len; i++) {
376 if (value->char_at(i + offset) != chars[i]) {
377 return false;
378 }
379 }
380 return true;
381 }
383 void java_lang_String::print(Handle java_string, outputStream* st) {
384 oop obj = java_string();
385 assert(obj->klass() == SystemDictionary::String_klass(), "must be java_string");
386 typeArrayOop value = java_lang_String::value(obj);
387 int offset = java_lang_String::offset(obj);
388 int length = java_lang_String::length(obj);
390 int end = MIN2(length, 100);
391 if (value == NULL) {
392 // This can happen if, e.g., printing a String
393 // object before its initializer has been called
394 st->print_cr("NULL");
395 } else {
396 st->print("\"");
397 for (int index = 0; index < length; index++) {
398 st->print("%c", value->char_at(index + offset));
399 }
400 st->print("\"");
401 }
402 }
404 static void initialize_static_field(fieldDescriptor* fd, TRAPS) {
405 Handle mirror (THREAD, fd->field_holder()->java_mirror());
406 assert(mirror.not_null() && fd->is_static(), "just checking");
407 if (fd->has_initial_value()) {
408 BasicType t = fd->field_type();
409 switch (t) {
410 case T_BYTE:
411 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
412 break;
413 case T_BOOLEAN:
414 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
415 break;
416 case T_CHAR:
417 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
418 break;
419 case T_SHORT:
420 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
421 break;
422 case T_INT:
423 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
424 break;
425 case T_FLOAT:
426 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
427 break;
428 case T_DOUBLE:
429 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
430 break;
431 case T_LONG:
432 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
433 break;
434 case T_OBJECT:
435 {
436 #ifdef ASSERT
437 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
438 assert(fd->signature() == sym, "just checking");
439 #endif
440 oop string = fd->string_initial_value(CHECK);
441 mirror()->obj_field_put(fd->offset(), string);
442 }
443 break;
444 default:
445 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
446 "Illegal ConstantValue attribute in class file");
447 }
448 }
449 }
452 // During bootstrap, java.lang.Class wasn't loaded so static field
453 // offsets were computed without the size added it. Go back and
454 // update all the static field offsets to included the size.
455 static void fixup_static_field(fieldDescriptor* fd, TRAPS) {
456 if (fd->is_static()) {
457 int real_offset = fd->offset() + instanceMirrorKlass::offset_of_static_fields();
458 typeArrayOop fields = instanceKlass::cast(fd->field_holder())->fields();
459 fields->short_at_put(fd->index() + instanceKlass::low_offset, extract_low_short_from_int(real_offset));
460 fields->short_at_put(fd->index() + instanceKlass::high_offset, extract_high_short_from_int(real_offset));
461 }
462 }
464 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) {
465 assert(instanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
467 if (k->oop_is_instance()) {
468 // Fixup the offsets
469 instanceKlass::cast(k())->do_local_static_fields(&fixup_static_field, CHECK);
470 }
471 create_mirror(k, CHECK);
472 }
474 oop java_lang_Class::create_mirror(KlassHandle k, TRAPS) {
475 assert(k->java_mirror() == NULL, "should only assign mirror once");
476 // Use this moment of initialization to cache modifier_flags also,
477 // to support Class.getModifiers(). Instance classes recalculate
478 // the cached flags after the class file is parsed, but before the
479 // class is put into the system dictionary.
480 int computed_modifiers = k->compute_modifier_flags(CHECK_0);
481 k->set_modifier_flags(computed_modifiers);
482 if (SystemDictionary::Class_klass_loaded() && (k->oop_is_instance() || k->oop_is_javaArray())) {
483 // Allocate mirror (java.lang.Class instance)
484 Handle mirror = instanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK_0);
485 // Setup indirections
486 mirror->obj_field_put(klass_offset, k());
487 k->set_java_mirror(mirror());
489 instanceMirrorKlass* mk = instanceMirrorKlass::cast(mirror->klass());
490 java_lang_Class::set_oop_size(mirror(), mk->instance_size(k));
491 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
493 // It might also have a component mirror. This mirror must already exist.
494 if (k->oop_is_javaArray()) {
495 Handle comp_mirror;
496 if (k->oop_is_typeArray()) {
497 BasicType type = typeArrayKlass::cast(k->as_klassOop())->element_type();
498 comp_mirror = Universe::java_mirror(type);
499 assert(comp_mirror.not_null(), "must have primitive mirror");
500 } else if (k->oop_is_objArray()) {
501 klassOop element_klass = objArrayKlass::cast(k->as_klassOop())->element_klass();
502 if (element_klass != NULL
503 && (Klass::cast(element_klass)->oop_is_instance() ||
504 Klass::cast(element_klass)->oop_is_javaArray())) {
505 comp_mirror = Klass::cast(element_klass)->java_mirror();
506 assert(comp_mirror.not_null(), "must have element mirror");
507 }
508 // else some object array internal to the VM, like systemObjArrayKlassObj
509 }
510 if (comp_mirror.not_null()) {
511 // Two-way link between the array klass and its component mirror:
512 arrayKlass::cast(k->as_klassOop())->set_component_mirror(comp_mirror());
513 set_array_klass(comp_mirror(), k->as_klassOop());
514 }
515 } else if (k->oop_is_instance()) {
516 // Initialize static fields
517 instanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, CHECK_NULL);
518 }
519 return mirror();
520 } else {
521 return NULL;
522 }
523 }
527 int java_lang_Class::oop_size(oop java_class) {
528 assert(oop_size_offset != 0, "must be set");
529 return java_class->int_field(oop_size_offset);
530 }
531 void java_lang_Class::set_oop_size(oop java_class, int size) {
532 assert(oop_size_offset != 0, "must be set");
533 java_class->int_field_put(oop_size_offset, size);
534 }
535 int java_lang_Class::static_oop_field_count(oop java_class) {
536 assert(static_oop_field_count_offset != 0, "must be set");
537 return java_class->int_field(static_oop_field_count_offset);
538 }
539 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
540 assert(static_oop_field_count_offset != 0, "must be set");
541 java_class->int_field_put(static_oop_field_count_offset, size);
542 }
547 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
548 // This should be improved by adding a field at the Java level or by
549 // introducing a new VM klass (see comment in ClassFileParser)
550 oop java_class = instanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance((oop)NULL, CHECK_0);
551 if (type != T_VOID) {
552 klassOop aklass = Universe::typeArrayKlassObj(type);
553 assert(aklass != NULL, "correct bootstrap");
554 set_array_klass(java_class, aklass);
555 }
556 instanceMirrorKlass* mk = instanceMirrorKlass::cast(SystemDictionary::Class_klass());
557 java_lang_Class::set_oop_size(java_class, mk->instance_size(oop(NULL)));
558 java_lang_Class::set_static_oop_field_count(java_class, 0);
559 return java_class;
560 }
563 klassOop java_lang_Class::as_klassOop(oop java_class) {
564 //%note memory_2
565 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
566 klassOop k = klassOop(java_class->obj_field(klass_offset));
567 assert(k == NULL || k->is_klass(), "type check");
568 return k;
569 }
572 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
573 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
574 Symbol* name = NULL;
575 bool is_instance = false;
576 if (is_primitive(java_class)) {
577 name = vmSymbols::type_signature(primitive_type(java_class));
578 } else {
579 klassOop k = as_klassOop(java_class);
580 is_instance = Klass::cast(k)->oop_is_instance();
581 name = Klass::cast(k)->name();
582 }
583 if (name == NULL) {
584 st->print("<null>");
585 return;
586 }
587 if (is_instance) st->print("L");
588 st->write((char*) name->base(), (int) name->utf8_length());
589 if (is_instance) st->print(";");
590 }
592 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
593 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
594 Symbol* name;
595 if (is_primitive(java_class)) {
596 name = vmSymbols::type_signature(primitive_type(java_class));
597 // Because this can create a new symbol, the caller has to decrement
598 // the refcount, so make adjustment here and below for symbols returned
599 // that are not created or incremented due to a successful lookup.
600 name->increment_refcount();
601 } else {
602 klassOop k = as_klassOop(java_class);
603 if (!Klass::cast(k)->oop_is_instance()) {
604 name = Klass::cast(k)->name();
605 name->increment_refcount();
606 } else {
607 ResourceMark rm;
608 const char* sigstr = Klass::cast(k)->signature_name();
609 int siglen = (int) strlen(sigstr);
610 if (!intern_if_not_found) {
611 name = SymbolTable::probe(sigstr, siglen);
612 } else {
613 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
614 }
615 }
616 }
617 return name;
618 }
621 klassOop java_lang_Class::array_klass(oop java_class) {
622 klassOop k = klassOop(java_class->obj_field(array_klass_offset));
623 assert(k == NULL || k->is_klass() && Klass::cast(k)->oop_is_javaArray(), "should be array klass");
624 return k;
625 }
628 void java_lang_Class::set_array_klass(oop java_class, klassOop klass) {
629 assert(klass->is_klass() && Klass::cast(klass)->oop_is_javaArray(), "should be array klass");
630 java_class->obj_field_put(array_klass_offset, klass);
631 }
634 methodOop java_lang_Class::resolved_constructor(oop java_class) {
635 oop constructor = java_class->obj_field(resolved_constructor_offset);
636 assert(constructor == NULL || constructor->is_method(), "should be method");
637 return methodOop(constructor);
638 }
641 void java_lang_Class::set_resolved_constructor(oop java_class, methodOop constructor) {
642 assert(constructor->is_method(), "should be method");
643 java_class->obj_field_put(resolved_constructor_offset, constructor);
644 }
647 bool java_lang_Class::is_primitive(oop java_class) {
648 // should assert:
649 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
650 klassOop k = klassOop(java_class->obj_field(klass_offset));
651 return k == NULL;
652 }
655 BasicType java_lang_Class::primitive_type(oop java_class) {
656 assert(java_lang_Class::is_primitive(java_class), "just checking");
657 klassOop ak = klassOop(java_class->obj_field(array_klass_offset));
658 BasicType type = T_VOID;
659 if (ak != NULL) {
660 // Note: create_basic_type_mirror above initializes ak to a non-null value.
661 type = arrayKlass::cast(ak)->element_type();
662 } else {
663 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
664 }
665 assert(Universe::java_mirror(type) == java_class, "must be consistent");
666 return type;
667 }
669 BasicType java_lang_Class::as_BasicType(oop java_class, klassOop* reference_klass) {
670 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
671 if (is_primitive(java_class)) {
672 if (reference_klass != NULL)
673 (*reference_klass) = NULL;
674 return primitive_type(java_class);
675 } else {
676 if (reference_klass != NULL)
677 (*reference_klass) = as_klassOop(java_class);
678 return T_OBJECT;
679 }
680 }
683 oop java_lang_Class::primitive_mirror(BasicType t) {
684 oop mirror = Universe::java_mirror(t);
685 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
686 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
687 return mirror;
688 }
690 bool java_lang_Class::offsets_computed = false;
691 int java_lang_Class::classRedefinedCount_offset = -1;
692 int java_lang_Class::parallelCapable_offset = -1;
694 void java_lang_Class::compute_offsets() {
695 assert(!offsets_computed, "offsets should be initialized only once");
696 offsets_computed = true;
698 klassOop k = SystemDictionary::Class_klass();
699 // The classRedefinedCount field is only present starting in 1.5,
700 // so don't go fatal.
701 compute_optional_offset(classRedefinedCount_offset,
702 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
704 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
705 klassOop k1 = SystemDictionary::ClassLoader_klass();
706 compute_optional_offset(parallelCapable_offset,
707 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
708 }
710 // For class loader classes, parallelCapable defined
711 // based on non-null field
712 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
713 bool java_lang_Class::parallelCapable(oop class_loader) {
714 if (!JDK_Version::is_gte_jdk17x_version()
715 || parallelCapable_offset == -1) {
716 // Default for backward compatibility is false
717 return false;
718 }
719 return (class_loader->obj_field(parallelCapable_offset) != NULL);
720 }
722 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
723 if (!JDK_Version::is_gte_jdk15x_version()
724 || classRedefinedCount_offset == -1) {
725 // The classRedefinedCount field is only present starting in 1.5.
726 // If we don't have an offset for it then just return -1 as a marker.
727 return -1;
728 }
730 return the_class_mirror->int_field(classRedefinedCount_offset);
731 }
733 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
734 if (!JDK_Version::is_gte_jdk15x_version()
735 || classRedefinedCount_offset == -1) {
736 // The classRedefinedCount field is only present starting in 1.5.
737 // If we don't have an offset for it then nothing to set.
738 return;
739 }
741 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
742 }
745 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
746 // platform thread structure, and a eetop offset which was used for thread
747 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
748 // merged, so in the HotSpot VM we just use the eetop field for the thread
749 // instead of the privateInfo_offset.
750 //
751 // Note: The stackSize field is only present starting in 1.4.
753 int java_lang_Thread::_name_offset = 0;
754 int java_lang_Thread::_group_offset = 0;
755 int java_lang_Thread::_contextClassLoader_offset = 0;
756 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
757 int java_lang_Thread::_priority_offset = 0;
758 int java_lang_Thread::_eetop_offset = 0;
759 int java_lang_Thread::_daemon_offset = 0;
760 int java_lang_Thread::_stillborn_offset = 0;
761 int java_lang_Thread::_stackSize_offset = 0;
762 int java_lang_Thread::_tid_offset = 0;
763 int java_lang_Thread::_thread_status_offset = 0;
764 int java_lang_Thread::_park_blocker_offset = 0;
765 int java_lang_Thread::_park_event_offset = 0 ;
768 void java_lang_Thread::compute_offsets() {
769 assert(_group_offset == 0, "offsets should be initialized only once");
771 klassOop k = SystemDictionary::Thread_klass();
772 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature());
773 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
774 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
775 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
776 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
777 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
778 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
779 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
780 // The stackSize field is only present starting in 1.4, so don't go fatal.
781 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
782 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
783 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
784 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
785 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
786 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
787 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
788 vmSymbols::long_signature());
789 }
792 JavaThread* java_lang_Thread::thread(oop java_thread) {
793 return (JavaThread*)java_thread->address_field(_eetop_offset);
794 }
797 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
798 java_thread->address_field_put(_eetop_offset, (address)thread);
799 }
802 typeArrayOop java_lang_Thread::name(oop java_thread) {
803 oop name = java_thread->obj_field(_name_offset);
804 assert(name == NULL || (name->is_typeArray() && typeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking");
805 return typeArrayOop(name);
806 }
809 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) {
810 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL");
811 java_thread->obj_field_put(_name_offset, name);
812 }
815 ThreadPriority java_lang_Thread::priority(oop java_thread) {
816 return (ThreadPriority)java_thread->int_field(_priority_offset);
817 }
820 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
821 java_thread->int_field_put(_priority_offset, priority);
822 }
825 oop java_lang_Thread::threadGroup(oop java_thread) {
826 return java_thread->obj_field(_group_offset);
827 }
830 bool java_lang_Thread::is_stillborn(oop java_thread) {
831 return java_thread->bool_field(_stillborn_offset) != 0;
832 }
835 // We never have reason to turn the stillborn bit off
836 void java_lang_Thread::set_stillborn(oop java_thread) {
837 java_thread->bool_field_put(_stillborn_offset, true);
838 }
841 bool java_lang_Thread::is_alive(oop java_thread) {
842 JavaThread* thr = java_lang_Thread::thread(java_thread);
843 return (thr != NULL);
844 }
847 bool java_lang_Thread::is_daemon(oop java_thread) {
848 return java_thread->bool_field(_daemon_offset) != 0;
849 }
852 void java_lang_Thread::set_daemon(oop java_thread) {
853 java_thread->bool_field_put(_daemon_offset, true);
854 }
856 oop java_lang_Thread::context_class_loader(oop java_thread) {
857 return java_thread->obj_field(_contextClassLoader_offset);
858 }
860 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
861 return java_thread->obj_field(_inheritedAccessControlContext_offset);
862 }
865 jlong java_lang_Thread::stackSize(oop java_thread) {
866 // The stackSize field is only present starting in 1.4
867 if (_stackSize_offset > 0) {
868 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check");
869 return java_thread->long_field(_stackSize_offset);
870 } else {
871 return 0;
872 }
873 }
875 // Write the thread status value to threadStatus field in java.lang.Thread java class.
876 void java_lang_Thread::set_thread_status(oop java_thread,
877 java_lang_Thread::ThreadStatus status) {
878 assert(JavaThread::current()->thread_state() == _thread_in_vm, "Java Thread is not running in vm");
879 // The threadStatus is only present starting in 1.5
880 if (_thread_status_offset > 0) {
881 java_thread->int_field_put(_thread_status_offset, status);
882 }
883 }
885 // Read thread status value from threadStatus field in java.lang.Thread java class.
886 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
887 assert(Thread::current()->is_VM_thread() ||
888 JavaThread::current()->thread_state() == _thread_in_vm,
889 "Java Thread is not running in vm");
890 // The threadStatus is only present starting in 1.5
891 if (_thread_status_offset > 0) {
892 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
893 } else {
894 // All we can easily figure out is if it is alive, but that is
895 // enough info for a valid unknown status.
896 // These aren't restricted to valid set ThreadStatus values, so
897 // use JVMTI values and cast.
898 JavaThread* thr = java_lang_Thread::thread(java_thread);
899 if (thr == NULL) {
900 // the thread hasn't run yet or is in the process of exiting
901 return NEW;
902 }
903 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
904 }
905 }
908 jlong java_lang_Thread::thread_id(oop java_thread) {
909 // The thread ID field is only present starting in 1.5
910 if (_tid_offset > 0) {
911 return java_thread->long_field(_tid_offset);
912 } else {
913 return 0;
914 }
915 }
917 oop java_lang_Thread::park_blocker(oop java_thread) {
918 assert(JDK_Version::current().supports_thread_park_blocker() &&
919 _park_blocker_offset != 0, "Must support parkBlocker field");
921 if (_park_blocker_offset > 0) {
922 return java_thread->obj_field(_park_blocker_offset);
923 }
925 return NULL;
926 }
928 jlong java_lang_Thread::park_event(oop java_thread) {
929 if (_park_event_offset > 0) {
930 return java_thread->long_field(_park_event_offset);
931 }
932 return 0;
933 }
935 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
936 if (_park_event_offset > 0) {
937 java_thread->long_field_put(_park_event_offset, ptr);
938 return true;
939 }
940 return false;
941 }
944 const char* java_lang_Thread::thread_status_name(oop java_thread) {
945 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status");
946 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
947 switch (status) {
948 case NEW : return "NEW";
949 case RUNNABLE : return "RUNNABLE";
950 case SLEEPING : return "TIMED_WAITING (sleeping)";
951 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
952 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
953 case PARKED : return "WAITING (parking)";
954 case PARKED_TIMED : return "TIMED_WAITING (parking)";
955 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
956 case TERMINATED : return "TERMINATED";
957 default : return "UNKNOWN";
958 };
959 }
960 int java_lang_ThreadGroup::_parent_offset = 0;
961 int java_lang_ThreadGroup::_name_offset = 0;
962 int java_lang_ThreadGroup::_threads_offset = 0;
963 int java_lang_ThreadGroup::_groups_offset = 0;
964 int java_lang_ThreadGroup::_maxPriority_offset = 0;
965 int java_lang_ThreadGroup::_destroyed_offset = 0;
966 int java_lang_ThreadGroup::_daemon_offset = 0;
967 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
968 int java_lang_ThreadGroup::_nthreads_offset = 0;
969 int java_lang_ThreadGroup::_ngroups_offset = 0;
971 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
972 assert(java_thread_group->is_oop(), "thread group must be oop");
973 return java_thread_group->obj_field(_parent_offset);
974 }
976 // ("name as oop" accessor is not necessary)
978 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
979 oop name = java_thread_group->obj_field(_name_offset);
980 // ThreadGroup.name can be null
981 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
982 }
984 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
985 assert(java_thread_group->is_oop(), "thread group must be oop");
986 return java_thread_group->int_field(_nthreads_offset);
987 }
989 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
990 oop threads = java_thread_group->obj_field(_threads_offset);
991 assert(threads != NULL, "threadgroups should have threads");
992 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
993 return objArrayOop(threads);
994 }
996 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
997 assert(java_thread_group->is_oop(), "thread group must be oop");
998 return java_thread_group->int_field(_ngroups_offset);
999 }
1001 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1002 oop groups = java_thread_group->obj_field(_groups_offset);
1003 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1004 return objArrayOop(groups);
1005 }
1007 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1008 assert(java_thread_group->is_oop(), "thread group must be oop");
1009 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1010 }
1012 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1013 assert(java_thread_group->is_oop(), "thread group must be oop");
1014 return java_thread_group->bool_field(_destroyed_offset) != 0;
1015 }
1017 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1018 assert(java_thread_group->is_oop(), "thread group must be oop");
1019 return java_thread_group->bool_field(_daemon_offset) != 0;
1020 }
1022 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1023 assert(java_thread_group->is_oop(), "thread group must be oop");
1024 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1025 }
1027 void java_lang_ThreadGroup::compute_offsets() {
1028 assert(_parent_offset == 0, "offsets should be initialized only once");
1030 klassOop k = SystemDictionary::ThreadGroup_klass();
1032 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1033 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1034 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1035 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1036 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1037 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1038 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1039 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1040 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1041 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1042 }
1044 oop java_lang_Throwable::backtrace(oop throwable) {
1045 return throwable->obj_field_acquire(backtrace_offset);
1046 }
1049 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1050 throwable->release_obj_field_put(backtrace_offset, value);
1051 }
1054 oop java_lang_Throwable::message(oop throwable) {
1055 return throwable->obj_field(detailMessage_offset);
1056 }
1059 oop java_lang_Throwable::message(Handle throwable) {
1060 return throwable->obj_field(detailMessage_offset);
1061 }
1064 void java_lang_Throwable::set_message(oop throwable, oop value) {
1065 throwable->obj_field_put(detailMessage_offset, value);
1066 }
1069 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1070 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1071 throwable->obj_field_put(stackTrace_offset, NULL);
1072 }
1075 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1076 ResourceMark rm;
1077 klassOop k = throwable->klass();
1078 assert(k != NULL, "just checking");
1079 st->print("%s", instanceKlass::cast(k)->external_name());
1080 oop msg = message(throwable);
1081 if (msg != NULL) {
1082 st->print(": %s", java_lang_String::as_utf8_string(msg));
1083 }
1084 }
1087 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1088 ResourceMark rm;
1089 klassOop k = throwable->klass();
1090 assert(k != NULL, "just checking");
1091 st->print("%s", instanceKlass::cast(k)->external_name());
1092 oop msg = message(throwable);
1093 if (msg != NULL) {
1094 st->print(": %s", java_lang_String::as_utf8_string(msg));
1095 }
1096 }
1098 // Print stack trace element to resource allocated buffer
1099 char* java_lang_Throwable::print_stack_element_to_buffer(methodOop method, int bci) {
1100 // Get strings and string lengths
1101 instanceKlass* klass = instanceKlass::cast(method->method_holder());
1102 const char* klass_name = klass->external_name();
1103 int buf_len = (int)strlen(klass_name);
1104 char* source_file_name;
1105 if (klass->source_file_name() == NULL) {
1106 source_file_name = NULL;
1107 } else {
1108 source_file_name = klass->source_file_name()->as_C_string();
1109 buf_len += (int)strlen(source_file_name);
1110 }
1111 char* method_name = method->name()->as_C_string();
1112 buf_len += (int)strlen(method_name);
1114 // Allocate temporary buffer with extra space for formatting and line number
1115 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1117 // Print stack trace line in buffer
1118 sprintf(buf, "\tat %s.%s", klass_name, method_name);
1119 if (method->is_native()) {
1120 strcat(buf, "(Native Method)");
1121 } else {
1122 int line_number = method->line_number_from_bci(bci);
1123 if (source_file_name != NULL && (line_number != -1)) {
1124 // Sourcename and linenumber
1125 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1126 } else if (source_file_name != NULL) {
1127 // Just sourcename
1128 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1129 } else {
1130 // Neither soucename and linenumber
1131 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1132 }
1133 nmethod* nm = method->code();
1134 if (WizardMode && nm != NULL) {
1135 sprintf(buf + (int)strlen(buf), "(nmethod " PTR_FORMAT ")", (intptr_t)nm);
1136 }
1137 }
1139 return buf;
1140 }
1143 void java_lang_Throwable::print_stack_element(Handle stream, methodOop method, int bci) {
1144 ResourceMark rm;
1145 char* buf = print_stack_element_to_buffer(method, bci);
1146 print_to_stream(stream, buf);
1147 }
1149 void java_lang_Throwable::print_stack_element(outputStream *st, methodOop method, int bci) {
1150 ResourceMark rm;
1151 char* buf = print_stack_element_to_buffer(method, bci);
1152 st->print_cr("%s", buf);
1153 }
1155 void java_lang_Throwable::print_to_stream(Handle stream, const char* str) {
1156 if (stream.is_null()) {
1157 tty->print_cr("%s", str);
1158 } else {
1159 EXCEPTION_MARK;
1160 JavaValue result(T_VOID);
1161 Handle arg (THREAD, oopFactory::new_charArray(str, THREAD));
1162 if (!HAS_PENDING_EXCEPTION) {
1163 JavaCalls::call_virtual(&result,
1164 stream,
1165 KlassHandle(THREAD, stream->klass()),
1166 vmSymbols::println_name(),
1167 vmSymbols::char_array_void_signature(),
1168 arg,
1169 THREAD);
1170 }
1171 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1172 if (HAS_PENDING_EXCEPTION) CLEAR_PENDING_EXCEPTION;
1173 }
1175 }
1178 const char* java_lang_Throwable::no_stack_trace_message() {
1179 return "\t<<no stack trace available>>";
1180 }
1183 // Currently used only for exceptions occurring during startup
1184 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1185 Thread *THREAD = Thread::current();
1186 Handle h_throwable(THREAD, throwable);
1187 while (h_throwable.not_null()) {
1188 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1189 if (result.is_null()) {
1190 st->print_cr(no_stack_trace_message());
1191 return;
1192 }
1194 while (result.not_null()) {
1195 objArrayHandle methods (THREAD,
1196 objArrayOop(result->obj_at(trace_methods_offset)));
1197 typeArrayHandle bcis (THREAD,
1198 typeArrayOop(result->obj_at(trace_bcis_offset)));
1200 if (methods.is_null() || bcis.is_null()) {
1201 st->print_cr(no_stack_trace_message());
1202 return;
1203 }
1205 int length = methods()->length();
1206 for (int index = 0; index < length; index++) {
1207 methodOop method = methodOop(methods()->obj_at(index));
1208 if (method == NULL) goto handle_cause;
1209 int bci = bcis->ushort_at(index);
1210 print_stack_element(st, method, bci);
1211 }
1212 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1213 }
1214 handle_cause:
1215 {
1216 EXCEPTION_MARK;
1217 JavaValue result(T_OBJECT);
1218 JavaCalls::call_virtual(&result,
1219 h_throwable,
1220 KlassHandle(THREAD, h_throwable->klass()),
1221 vmSymbols::getCause_name(),
1222 vmSymbols::void_throwable_signature(),
1223 THREAD);
1224 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1225 if (HAS_PENDING_EXCEPTION) {
1226 CLEAR_PENDING_EXCEPTION;
1227 h_throwable = Handle();
1228 } else {
1229 h_throwable = Handle(THREAD, (oop) result.get_jobject());
1230 if (h_throwable.not_null()) {
1231 st->print("Caused by: ");
1232 print(h_throwable, st);
1233 st->cr();
1234 }
1235 }
1236 }
1237 }
1238 }
1241 void java_lang_Throwable::print_stack_trace(oop throwable, oop print_stream) {
1242 // Note: this is no longer used in Merlin, but we support it for compatibility.
1243 Thread *thread = Thread::current();
1244 Handle stream(thread, print_stream);
1245 objArrayHandle result (thread, objArrayOop(backtrace(throwable)));
1246 if (result.is_null()) {
1247 print_to_stream(stream, no_stack_trace_message());
1248 return;
1249 }
1251 while (result.not_null()) {
1252 objArrayHandle methods (thread,
1253 objArrayOop(result->obj_at(trace_methods_offset)));
1254 typeArrayHandle bcis (thread,
1255 typeArrayOop(result->obj_at(trace_bcis_offset)));
1257 if (methods.is_null() || bcis.is_null()) {
1258 print_to_stream(stream, no_stack_trace_message());
1259 return;
1260 }
1262 int length = methods()->length();
1263 for (int index = 0; index < length; index++) {
1264 methodOop method = methodOop(methods()->obj_at(index));
1265 if (method == NULL) return;
1266 int bci = bcis->ushort_at(index);
1267 print_stack_element(stream, method, bci);
1268 }
1269 result = objArrayHandle(thread, objArrayOop(result->obj_at(trace_next_offset)));
1270 }
1271 }
1273 // This class provides a simple wrapper over the internal structure of
1274 // exception backtrace to insulate users of the backtrace from needing
1275 // to know what it looks like.
1276 class BacktraceBuilder: public StackObj {
1277 private:
1278 Handle _backtrace;
1279 objArrayOop _head;
1280 objArrayOop _methods;
1281 typeArrayOop _bcis;
1282 int _index;
1283 bool _dirty;
1284 No_Safepoint_Verifier _nsv;
1286 public:
1288 enum {
1289 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1290 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1291 trace_next_offset = java_lang_Throwable::trace_next_offset,
1292 trace_size = java_lang_Throwable::trace_size,
1293 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1294 };
1296 // constructor for new backtrace
1297 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _dirty(false) {
1298 expand(CHECK);
1299 _backtrace = _head;
1300 _index = 0;
1301 }
1303 void flush() {
1304 // The following appears to have been an optimization to save from
1305 // doing a barrier for each individual store into the _methods array,
1306 // but rather to do it for the entire array after the series of writes.
1307 // That optimization seems to have been lost when compressed oops was
1308 // implemented. However, the extra card-marks below was left in place,
1309 // but is now redundant because the individual stores into the
1310 // _methods array already execute the barrier code. CR 6918185 has
1311 // been filed so the original code may be restored by deferring the
1312 // barriers until after the entire sequence of stores, thus re-enabling
1313 // the intent of the original optimization. In the meantime the redundant
1314 // card mark below is now disabled.
1315 if (_dirty && _methods != NULL) {
1316 #if 0
1317 BarrierSet* bs = Universe::heap()->barrier_set();
1318 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt");
1319 bs->write_ref_array((HeapWord*)_methods->base(), _methods->length());
1320 #endif
1321 _dirty = false;
1322 }
1323 }
1325 void expand(TRAPS) {
1326 flush();
1328 objArrayHandle old_head(THREAD, _head);
1329 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1331 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1332 objArrayHandle new_head(THREAD, head);
1334 objArrayOop methods = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1335 objArrayHandle new_methods(THREAD, methods);
1337 typeArrayOop bcis = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1338 typeArrayHandle new_bcis(THREAD, bcis);
1340 if (!old_head.is_null()) {
1341 old_head->obj_at_put(trace_next_offset, new_head());
1342 }
1343 new_head->obj_at_put(trace_methods_offset, new_methods());
1344 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1346 _head = new_head();
1347 _methods = new_methods();
1348 _bcis = new_bcis();
1349 _index = 0;
1350 }
1352 oop backtrace() {
1353 flush();
1354 return _backtrace();
1355 }
1357 inline void push(methodOop method, short bci, TRAPS) {
1358 if (_index >= trace_chunk_size) {
1359 methodHandle mhandle(THREAD, method);
1360 expand(CHECK);
1361 method = mhandle();
1362 }
1364 _methods->obj_at_put(_index, method);
1365 _bcis->ushort_at_put(_index, bci);
1366 _index++;
1367 _dirty = true;
1368 }
1370 methodOop current_method() {
1371 assert(_index >= 0 && _index < trace_chunk_size, "out of range");
1372 return methodOop(_methods->obj_at(_index));
1373 }
1375 jushort current_bci() {
1376 assert(_index >= 0 && _index < trace_chunk_size, "out of range");
1377 return _bcis->ushort_at(_index);
1378 }
1379 };
1382 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, TRAPS) {
1383 if (!StackTraceInThrowable) return;
1384 ResourceMark rm(THREAD);
1386 // Start out by clearing the backtrace for this object, in case the VM
1387 // runs out of memory while allocating the stack trace
1388 set_backtrace(throwable(), NULL);
1389 if (JDK_Version::is_gte_jdk14x_version()) {
1390 // New since 1.4, clear lazily constructed Java level stacktrace if
1391 // refilling occurs
1392 clear_stacktrace(throwable());
1393 }
1395 int max_depth = MaxJavaStackTraceDepth;
1396 JavaThread* thread = (JavaThread*)THREAD;
1397 BacktraceBuilder bt(CHECK);
1399 // Instead of using vframe directly, this version of fill_in_stack_trace
1400 // basically handles everything by hand. This significantly improved the
1401 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1402 // See bug 6333838 for more details.
1403 // The "ASSERT" here is to verify this method generates the exactly same stack
1404 // trace as utilizing vframe.
1405 #ifdef ASSERT
1406 vframeStream st(thread);
1407 methodHandle st_method(THREAD, st.method());
1408 #endif
1409 int total_count = 0;
1410 RegisterMap map(thread, false);
1411 int decode_offset = 0;
1412 nmethod* nm = NULL;
1413 bool skip_fillInStackTrace_check = false;
1414 bool skip_throwableInit_check = false;
1416 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1417 methodOop method = NULL;
1418 int bci = 0;
1420 // Compiled java method case.
1421 if (decode_offset != 0) {
1422 DebugInfoReadStream stream(nm, decode_offset);
1423 decode_offset = stream.read_int();
1424 method = (methodOop)nm->oop_at(stream.read_int());
1425 bci = stream.read_bci();
1426 } else {
1427 if (fr.is_first_frame()) break;
1428 address pc = fr.pc();
1429 if (fr.is_interpreted_frame()) {
1430 intptr_t bcx = fr.interpreter_frame_bcx();
1431 method = fr.interpreter_frame_method();
1432 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
1433 fr = fr.sender(&map);
1434 } else {
1435 CodeBlob* cb = fr.cb();
1436 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1437 // but non nmethod
1438 fr = fr.sender(&map);
1439 if (cb == NULL || !cb->is_nmethod()) {
1440 continue;
1441 }
1442 nm = (nmethod*)cb;
1443 if (nm->method()->is_native()) {
1444 method = nm->method();
1445 bci = 0;
1446 } else {
1447 PcDesc* pd = nm->pc_desc_at(pc);
1448 decode_offset = pd->scope_decode_offset();
1449 // if decode_offset is not equal to 0, it will execute the
1450 // "compiled java method case" at the beginning of the loop.
1451 continue;
1452 }
1453 }
1454 }
1455 #ifdef ASSERT
1456 assert(st_method() == method && st.bci() == bci,
1457 "Wrong stack trace");
1458 st.next();
1459 // vframeStream::method isn't GC-safe so store off a copy
1460 // of the methodOop in case we GC.
1461 if (!st.at_end()) {
1462 st_method = st.method();
1463 }
1464 #endif
1465 if (!skip_fillInStackTrace_check) {
1466 // check "fillInStackTrace" only once, so we negate the flag
1467 // after the first time check.
1468 skip_fillInStackTrace_check = true;
1469 if (method->name() == vmSymbols::fillInStackTrace_name()) {
1470 continue;
1471 }
1472 }
1473 // skip <init> methods of the exceptions klass. If there is <init> methods
1474 // that belongs to a superclass of the exception we are going to skipping
1475 // them in stack trace. This is simlar to classic VM.
1476 if (!skip_throwableInit_check) {
1477 if (method->name() == vmSymbols::object_initializer_name() &&
1478 throwable->is_a(method->method_holder())) {
1479 continue;
1480 } else {
1481 // if no "Throwable.init()" method found, we stop checking it next time.
1482 skip_throwableInit_check = true;
1483 }
1484 }
1485 bt.push(method, bci, CHECK);
1486 total_count++;
1487 }
1489 // Put completed stack trace into throwable object
1490 set_backtrace(throwable(), bt.backtrace());
1491 }
1493 void java_lang_Throwable::fill_in_stack_trace(Handle throwable) {
1494 // No-op if stack trace is disabled
1495 if (!StackTraceInThrowable) {
1496 return;
1497 }
1499 // Disable stack traces for some preallocated out of memory errors
1500 if (!Universe::should_fill_in_stack_trace(throwable)) {
1501 return;
1502 }
1504 PRESERVE_EXCEPTION_MARK;
1506 JavaThread* thread = JavaThread::active();
1507 fill_in_stack_trace(throwable, thread);
1508 // ignore exceptions thrown during stack trace filling
1509 CLEAR_PENDING_EXCEPTION;
1510 }
1512 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1513 // Allocate stack trace - backtrace is created but not filled in
1515 // No-op if stack trace is disabled
1516 if (!StackTraceInThrowable) return;
1518 objArrayOop h_oop = oopFactory::new_objectArray(trace_size, CHECK);
1519 objArrayHandle backtrace (THREAD, h_oop);
1520 objArrayOop m_oop = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1521 objArrayHandle methods (THREAD, m_oop);
1522 typeArrayOop b = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1523 typeArrayHandle bcis(THREAD, b);
1525 // backtrace has space for one chunk (next is NULL)
1526 backtrace->obj_at_put(trace_methods_offset, methods());
1527 backtrace->obj_at_put(trace_bcis_offset, bcis());
1528 set_backtrace(throwable(), backtrace());
1529 }
1532 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1533 // Fill in stack trace into preallocated backtrace (no GC)
1535 // No-op if stack trace is disabled
1536 if (!StackTraceInThrowable) return;
1538 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1540 oop backtrace = java_lang_Throwable::backtrace(throwable());
1541 assert(backtrace != NULL, "backtrace not preallocated");
1543 oop m = objArrayOop(backtrace)->obj_at(trace_methods_offset);
1544 objArrayOop methods = objArrayOop(m);
1545 assert(methods != NULL && methods->length() > 0, "method array not preallocated");
1547 oop b = objArrayOop(backtrace)->obj_at(trace_bcis_offset);
1548 typeArrayOop bcis = typeArrayOop(b);
1549 assert(bcis != NULL, "bci array not preallocated");
1551 assert(methods->length() == bcis->length(), "method and bci arrays should match");
1553 JavaThread* thread = JavaThread::current();
1554 ResourceMark rm(thread);
1555 vframeStream st(thread);
1557 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1558 // methods as preallocated errors aren't created by "java" code.
1560 // fill in as much stack trace as possible
1561 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1562 int chunk_count = 0;
1564 for (;!st.at_end(); st.next()) {
1565 // add element
1566 bcis->ushort_at_put(chunk_count, st.bci());
1567 methods->obj_at_put(chunk_count, st.method());
1569 chunk_count++;
1571 // Bail-out for deep stacks
1572 if (chunk_count >= max_chunks) break;
1573 }
1574 }
1577 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1578 if (throwable == NULL) {
1579 THROW_0(vmSymbols::java_lang_NullPointerException());
1580 }
1581 objArrayOop chunk = objArrayOop(backtrace(throwable));
1582 int depth = 0;
1583 if (chunk != NULL) {
1584 // Iterate over chunks and count full ones
1585 while (true) {
1586 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1587 if (next == NULL) break;
1588 depth += trace_chunk_size;
1589 chunk = next;
1590 }
1591 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1592 // Count element in remaining partial chunk
1593 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
1594 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1595 assert(methods != NULL && bcis != NULL, "sanity check");
1596 for (int i = 0; i < methods->length(); i++) {
1597 if (methods->obj_at(i) == NULL) break;
1598 depth++;
1599 }
1600 }
1601 return depth;
1602 }
1605 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1606 if (throwable == NULL) {
1607 THROW_0(vmSymbols::java_lang_NullPointerException());
1608 }
1609 if (index < 0) {
1610 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1611 }
1612 // Compute how many chunks to skip and index into actual chunk
1613 objArrayOop chunk = objArrayOop(backtrace(throwable));
1614 int skip_chunks = index / trace_chunk_size;
1615 int chunk_index = index % trace_chunk_size;
1616 while (chunk != NULL && skip_chunks > 0) {
1617 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1618 skip_chunks--;
1619 }
1620 if (chunk == NULL) {
1621 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1622 }
1623 // Get method,bci from chunk
1624 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
1625 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1626 assert(methods != NULL && bcis != NULL, "sanity check");
1627 methodHandle method(THREAD, methodOop(methods->obj_at(chunk_index)));
1628 int bci = bcis->ushort_at(chunk_index);
1629 // Chunk can be partial full
1630 if (method.is_null()) {
1631 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1632 }
1634 oop element = java_lang_StackTraceElement::create(method, bci, CHECK_0);
1635 return element;
1636 }
1638 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1639 // SystemDictionary::stackTraceElement_klass() will be null for pre-1.4 JDKs
1640 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1642 // Allocate java.lang.StackTraceElement instance
1643 klassOop k = SystemDictionary::StackTraceElement_klass();
1644 assert(k != NULL, "must be loaded in 1.4+");
1645 instanceKlassHandle ik (THREAD, k);
1646 if (ik->should_be_initialized()) {
1647 ik->initialize(CHECK_0);
1648 }
1650 Handle element = ik->allocate_instance_handle(CHECK_0);
1651 // Fill in class name
1652 ResourceMark rm(THREAD);
1653 const char* str = instanceKlass::cast(method->method_holder())->external_name();
1654 oop classname = StringTable::intern((char*) str, CHECK_0);
1655 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1656 // Fill in method name
1657 oop methodname = StringTable::intern(method->name(), CHECK_0);
1658 java_lang_StackTraceElement::set_methodName(element(), methodname);
1659 // Fill in source file name
1660 Symbol* source = instanceKlass::cast(method->method_holder())->source_file_name();
1661 oop filename = StringTable::intern(source, CHECK_0);
1662 java_lang_StackTraceElement::set_fileName(element(), filename);
1663 // File in source line number
1664 int line_number;
1665 if (method->is_native()) {
1666 // Negative value different from -1 below, enabling Java code in
1667 // class java.lang.StackTraceElement to distinguish "native" from
1668 // "no LineNumberTable".
1669 line_number = -2;
1670 } else {
1671 // Returns -1 if no LineNumberTable, and otherwise actual line number
1672 line_number = method->line_number_from_bci(bci);
1673 }
1674 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1676 return element();
1677 }
1680 void java_lang_reflect_AccessibleObject::compute_offsets() {
1681 klassOop k = SystemDictionary::reflect_AccessibleObject_klass();
1682 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1683 }
1685 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1686 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1687 return (jboolean) reflect->bool_field(override_offset);
1688 }
1690 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1691 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1692 reflect->bool_field_put(override_offset, (int) value);
1693 }
1695 void java_lang_reflect_Method::compute_offsets() {
1696 klassOop k = SystemDictionary::reflect_Method_klass();
1697 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1698 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1699 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1700 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1701 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1702 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1703 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1704 // The generic signature and annotations fields are only present in 1.5
1705 signature_offset = -1;
1706 annotations_offset = -1;
1707 parameter_annotations_offset = -1;
1708 annotation_default_offset = -1;
1709 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1710 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1711 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1712 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1713 }
1715 Handle java_lang_reflect_Method::create(TRAPS) {
1716 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1717 klassOop klass = SystemDictionary::reflect_Method_klass();
1718 // This class is eagerly initialized during VM initialization, since we keep a refence
1719 // to one of the methods
1720 assert(instanceKlass::cast(klass)->is_initialized(), "must be initialized");
1721 return instanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH);
1722 }
1724 oop java_lang_reflect_Method::clazz(oop reflect) {
1725 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1726 return reflect->obj_field(clazz_offset);
1727 }
1729 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1730 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1731 reflect->obj_field_put(clazz_offset, value);
1732 }
1734 int java_lang_reflect_Method::slot(oop reflect) {
1735 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1736 return reflect->int_field(slot_offset);
1737 }
1739 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1740 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1741 reflect->int_field_put(slot_offset, value);
1742 }
1744 oop java_lang_reflect_Method::name(oop method) {
1745 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1746 return method->obj_field(name_offset);
1747 }
1749 void java_lang_reflect_Method::set_name(oop method, oop value) {
1750 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1751 method->obj_field_put(name_offset, value);
1752 }
1754 oop java_lang_reflect_Method::return_type(oop method) {
1755 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1756 return method->obj_field(returnType_offset);
1757 }
1759 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
1760 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1761 method->obj_field_put(returnType_offset, value);
1762 }
1764 oop java_lang_reflect_Method::parameter_types(oop method) {
1765 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1766 return method->obj_field(parameterTypes_offset);
1767 }
1769 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
1770 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1771 method->obj_field_put(parameterTypes_offset, value);
1772 }
1774 oop java_lang_reflect_Method::exception_types(oop method) {
1775 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1776 return method->obj_field(exceptionTypes_offset);
1777 }
1779 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
1780 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1781 method->obj_field_put(exceptionTypes_offset, value);
1782 }
1784 int java_lang_reflect_Method::modifiers(oop method) {
1785 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1786 return method->int_field(modifiers_offset);
1787 }
1789 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
1790 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1791 method->int_field_put(modifiers_offset, value);
1792 }
1794 bool java_lang_reflect_Method::has_signature_field() {
1795 return (signature_offset >= 0);
1796 }
1798 oop java_lang_reflect_Method::signature(oop method) {
1799 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1800 assert(has_signature_field(), "signature field must be present");
1801 return method->obj_field(signature_offset);
1802 }
1804 void java_lang_reflect_Method::set_signature(oop method, oop value) {
1805 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1806 assert(has_signature_field(), "signature field must be present");
1807 method->obj_field_put(signature_offset, value);
1808 }
1810 bool java_lang_reflect_Method::has_annotations_field() {
1811 return (annotations_offset >= 0);
1812 }
1814 oop java_lang_reflect_Method::annotations(oop method) {
1815 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1816 assert(has_annotations_field(), "annotations field must be present");
1817 return method->obj_field(annotations_offset);
1818 }
1820 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
1821 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1822 assert(has_annotations_field(), "annotations field must be present");
1823 method->obj_field_put(annotations_offset, value);
1824 }
1826 bool java_lang_reflect_Method::has_parameter_annotations_field() {
1827 return (parameter_annotations_offset >= 0);
1828 }
1830 oop java_lang_reflect_Method::parameter_annotations(oop method) {
1831 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1832 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1833 return method->obj_field(parameter_annotations_offset);
1834 }
1836 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
1837 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1838 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1839 method->obj_field_put(parameter_annotations_offset, value);
1840 }
1842 bool java_lang_reflect_Method::has_annotation_default_field() {
1843 return (annotation_default_offset >= 0);
1844 }
1846 oop java_lang_reflect_Method::annotation_default(oop method) {
1847 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1848 assert(has_annotation_default_field(), "annotation default field must be present");
1849 return method->obj_field(annotation_default_offset);
1850 }
1852 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
1853 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1854 assert(has_annotation_default_field(), "annotation default field must be present");
1855 method->obj_field_put(annotation_default_offset, value);
1856 }
1858 void java_lang_reflect_Constructor::compute_offsets() {
1859 klassOop k = SystemDictionary::reflect_Constructor_klass();
1860 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1861 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1862 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1863 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1864 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1865 // The generic signature and annotations fields are only present in 1.5
1866 signature_offset = -1;
1867 annotations_offset = -1;
1868 parameter_annotations_offset = -1;
1869 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1870 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1871 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1872 }
1874 Handle java_lang_reflect_Constructor::create(TRAPS) {
1875 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1876 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
1877 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
1878 instanceKlassHandle klass (THREAD, k);
1879 // Ensure it is initialized
1880 klass->initialize(CHECK_NH);
1881 return klass->allocate_instance_handle(CHECK_NH);
1882 }
1884 oop java_lang_reflect_Constructor::clazz(oop reflect) {
1885 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1886 return reflect->obj_field(clazz_offset);
1887 }
1889 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
1890 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1891 reflect->obj_field_put(clazz_offset, value);
1892 }
1894 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
1895 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1896 return constructor->obj_field(parameterTypes_offset);
1897 }
1899 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
1900 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1901 constructor->obj_field_put(parameterTypes_offset, value);
1902 }
1904 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
1905 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1906 return constructor->obj_field(exceptionTypes_offset);
1907 }
1909 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
1910 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1911 constructor->obj_field_put(exceptionTypes_offset, value);
1912 }
1914 int java_lang_reflect_Constructor::slot(oop reflect) {
1915 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1916 return reflect->int_field(slot_offset);
1917 }
1919 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
1920 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1921 reflect->int_field_put(slot_offset, value);
1922 }
1924 int java_lang_reflect_Constructor::modifiers(oop constructor) {
1925 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1926 return constructor->int_field(modifiers_offset);
1927 }
1929 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
1930 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1931 constructor->int_field_put(modifiers_offset, value);
1932 }
1934 bool java_lang_reflect_Constructor::has_signature_field() {
1935 return (signature_offset >= 0);
1936 }
1938 oop java_lang_reflect_Constructor::signature(oop constructor) {
1939 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1940 assert(has_signature_field(), "signature field must be present");
1941 return constructor->obj_field(signature_offset);
1942 }
1944 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
1945 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1946 assert(has_signature_field(), "signature field must be present");
1947 constructor->obj_field_put(signature_offset, value);
1948 }
1950 bool java_lang_reflect_Constructor::has_annotations_field() {
1951 return (annotations_offset >= 0);
1952 }
1954 oop java_lang_reflect_Constructor::annotations(oop constructor) {
1955 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1956 assert(has_annotations_field(), "annotations field must be present");
1957 return constructor->obj_field(annotations_offset);
1958 }
1960 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
1961 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1962 assert(has_annotations_field(), "annotations field must be present");
1963 constructor->obj_field_put(annotations_offset, value);
1964 }
1966 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
1967 return (parameter_annotations_offset >= 0);
1968 }
1970 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
1971 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1972 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1973 return method->obj_field(parameter_annotations_offset);
1974 }
1976 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
1977 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1978 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1979 method->obj_field_put(parameter_annotations_offset, value);
1980 }
1982 void java_lang_reflect_Field::compute_offsets() {
1983 klassOop k = SystemDictionary::reflect_Field_klass();
1984 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1985 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1986 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
1987 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1988 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1989 // The generic signature and annotations fields are only present in 1.5
1990 signature_offset = -1;
1991 annotations_offset = -1;
1992 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1993 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1994 }
1996 Handle java_lang_reflect_Field::create(TRAPS) {
1997 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1998 Symbol* name = vmSymbols::java_lang_reflect_Field();
1999 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2000 instanceKlassHandle klass (THREAD, k);
2001 // Ensure it is initialized
2002 klass->initialize(CHECK_NH);
2003 return klass->allocate_instance_handle(CHECK_NH);
2004 }
2006 oop java_lang_reflect_Field::clazz(oop reflect) {
2007 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2008 return reflect->obj_field(clazz_offset);
2009 }
2011 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2012 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2013 reflect->obj_field_put(clazz_offset, value);
2014 }
2016 oop java_lang_reflect_Field::name(oop field) {
2017 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2018 return field->obj_field(name_offset);
2019 }
2021 void java_lang_reflect_Field::set_name(oop field, oop value) {
2022 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2023 field->obj_field_put(name_offset, value);
2024 }
2026 oop java_lang_reflect_Field::type(oop field) {
2027 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2028 return field->obj_field(type_offset);
2029 }
2031 void java_lang_reflect_Field::set_type(oop field, oop value) {
2032 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2033 field->obj_field_put(type_offset, value);
2034 }
2036 int java_lang_reflect_Field::slot(oop reflect) {
2037 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2038 return reflect->int_field(slot_offset);
2039 }
2041 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2042 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2043 reflect->int_field_put(slot_offset, value);
2044 }
2046 int java_lang_reflect_Field::modifiers(oop field) {
2047 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2048 return field->int_field(modifiers_offset);
2049 }
2051 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2052 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2053 field->int_field_put(modifiers_offset, value);
2054 }
2056 bool java_lang_reflect_Field::has_signature_field() {
2057 return (signature_offset >= 0);
2058 }
2060 oop java_lang_reflect_Field::signature(oop field) {
2061 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2062 assert(has_signature_field(), "signature field must be present");
2063 return field->obj_field(signature_offset);
2064 }
2066 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2067 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2068 assert(has_signature_field(), "signature field must be present");
2069 field->obj_field_put(signature_offset, value);
2070 }
2072 bool java_lang_reflect_Field::has_annotations_field() {
2073 return (annotations_offset >= 0);
2074 }
2076 oop java_lang_reflect_Field::annotations(oop field) {
2077 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2078 assert(has_annotations_field(), "annotations field must be present");
2079 return field->obj_field(annotations_offset);
2080 }
2082 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2083 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2084 assert(has_annotations_field(), "annotations field must be present");
2085 field->obj_field_put(annotations_offset, value);
2086 }
2089 void sun_reflect_ConstantPool::compute_offsets() {
2090 klassOop k = SystemDictionary::reflect_ConstantPool_klass();
2091 // This null test can be removed post beta
2092 if (k != NULL) {
2093 compute_offset(_cp_oop_offset, k, vmSymbols::constantPoolOop_name(), vmSymbols::object_signature());
2094 }
2095 }
2098 Handle sun_reflect_ConstantPool::create(TRAPS) {
2099 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2100 klassOop k = SystemDictionary::reflect_ConstantPool_klass();
2101 instanceKlassHandle klass (THREAD, k);
2102 // Ensure it is initialized
2103 klass->initialize(CHECK_NH);
2104 return klass->allocate_instance_handle(CHECK_NH);
2105 }
2108 oop sun_reflect_ConstantPool::cp_oop(oop reflect) {
2109 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2110 return reflect->obj_field(_cp_oop_offset);
2111 }
2114 void sun_reflect_ConstantPool::set_cp_oop(oop reflect, oop value) {
2115 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2116 reflect->obj_field_put(_cp_oop_offset, value);
2117 }
2119 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2120 klassOop k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2121 // This null test can be removed post beta
2122 if (k != NULL) {
2123 compute_offset(_base_offset, k,
2124 vmSymbols::base_name(), vmSymbols::object_signature());
2125 }
2126 }
2128 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2129 klassOop k = SystemDictionary::box_klass(type);
2130 if (k == NULL) return NULL;
2131 instanceKlassHandle h (THREAD, k);
2132 if (!h->is_initialized()) h->initialize(CHECK_0);
2133 return h->allocate_instance(THREAD);
2134 }
2137 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2138 oop box = initialize_and_allocate(type, CHECK_0);
2139 if (box == NULL) return NULL;
2140 switch (type) {
2141 case T_BOOLEAN:
2142 box->bool_field_put(value_offset, value->z);
2143 break;
2144 case T_CHAR:
2145 box->char_field_put(value_offset, value->c);
2146 break;
2147 case T_FLOAT:
2148 box->float_field_put(value_offset, value->f);
2149 break;
2150 case T_DOUBLE:
2151 box->double_field_put(long_value_offset, value->d);
2152 break;
2153 case T_BYTE:
2154 box->byte_field_put(value_offset, value->b);
2155 break;
2156 case T_SHORT:
2157 box->short_field_put(value_offset, value->s);
2158 break;
2159 case T_INT:
2160 box->int_field_put(value_offset, value->i);
2161 break;
2162 case T_LONG:
2163 box->long_field_put(long_value_offset, value->j);
2164 break;
2165 default:
2166 return NULL;
2167 }
2168 return box;
2169 }
2172 BasicType java_lang_boxing_object::basic_type(oop box) {
2173 if (box == NULL) return T_ILLEGAL;
2174 BasicType type = SystemDictionary::box_klass_type(box->klass());
2175 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2176 return T_ILLEGAL;
2177 return type;
2178 }
2181 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2182 BasicType type = SystemDictionary::box_klass_type(box->klass());
2183 switch (type) {
2184 case T_BOOLEAN:
2185 value->z = box->bool_field(value_offset);
2186 break;
2187 case T_CHAR:
2188 value->c = box->char_field(value_offset);
2189 break;
2190 case T_FLOAT:
2191 value->f = box->float_field(value_offset);
2192 break;
2193 case T_DOUBLE:
2194 value->d = box->double_field(long_value_offset);
2195 break;
2196 case T_BYTE:
2197 value->b = box->byte_field(value_offset);
2198 break;
2199 case T_SHORT:
2200 value->s = box->short_field(value_offset);
2201 break;
2202 case T_INT:
2203 value->i = box->int_field(value_offset);
2204 break;
2205 case T_LONG:
2206 value->j = box->long_field(long_value_offset);
2207 break;
2208 default:
2209 return T_ILLEGAL;
2210 } // end switch
2211 return type;
2212 }
2215 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2216 BasicType type = SystemDictionary::box_klass_type(box->klass());
2217 switch (type) {
2218 case T_BOOLEAN:
2219 box->bool_field_put(value_offset, value->z);
2220 break;
2221 case T_CHAR:
2222 box->char_field_put(value_offset, value->c);
2223 break;
2224 case T_FLOAT:
2225 box->float_field_put(value_offset, value->f);
2226 break;
2227 case T_DOUBLE:
2228 box->double_field_put(long_value_offset, value->d);
2229 break;
2230 case T_BYTE:
2231 box->byte_field_put(value_offset, value->b);
2232 break;
2233 case T_SHORT:
2234 box->short_field_put(value_offset, value->s);
2235 break;
2236 case T_INT:
2237 box->int_field_put(value_offset, value->i);
2238 break;
2239 case T_LONG:
2240 box->long_field_put(long_value_offset, value->j);
2241 break;
2242 default:
2243 return T_ILLEGAL;
2244 } // end switch
2245 return type;
2246 }
2249 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2250 switch (type) {
2251 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2252 case T_CHAR: st->print("%d", value->c); break;
2253 case T_BYTE: st->print("%d", value->b); break;
2254 case T_SHORT: st->print("%d", value->s); break;
2255 case T_INT: st->print("%d", value->i); break;
2256 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2257 case T_FLOAT: st->print("%f", value->f); break;
2258 case T_DOUBLE: st->print("%lf", value->d); break;
2259 default: st->print("type %d?", type); break;
2260 }
2261 }
2264 // Support for java_lang_ref_Reference
2265 oop java_lang_ref_Reference::pending_list_lock() {
2266 instanceKlass* ik = instanceKlass::cast(SystemDictionary::Reference_klass());
2267 address addr = ik->static_field_addr(static_lock_offset);
2268 if (UseCompressedOops) {
2269 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2270 } else {
2271 return oopDesc::load_decode_heap_oop((oop*)addr);
2272 }
2273 }
2275 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2276 instanceKlass* ik = instanceKlass::cast(SystemDictionary::Reference_klass());
2277 address addr = ik->static_field_addr(static_pending_offset);
2278 // XXX This might not be HeapWord aligned, almost rather be char *.
2279 return (HeapWord*)addr;
2280 }
2282 oop java_lang_ref_Reference::pending_list() {
2283 char *addr = (char *)pending_list_addr();
2284 if (UseCompressedOops) {
2285 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2286 } else {
2287 return oopDesc::load_decode_heap_oop((oop*)addr);
2288 }
2289 }
2292 // Support for java_lang_ref_SoftReference
2294 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2295 return ref->long_field(timestamp_offset);
2296 }
2298 jlong java_lang_ref_SoftReference::clock() {
2299 instanceKlass* ik = instanceKlass::cast(SystemDictionary::SoftReference_klass());
2300 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2301 return *offset;
2302 }
2304 void java_lang_ref_SoftReference::set_clock(jlong value) {
2305 instanceKlass* ik = instanceKlass::cast(SystemDictionary::SoftReference_klass());
2306 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2307 *offset = value;
2308 }
2311 // Support for java_lang_invoke_MethodHandle
2313 int java_lang_invoke_MethodHandle::_type_offset;
2314 int java_lang_invoke_MethodHandle::_vmtarget_offset;
2315 int java_lang_invoke_MethodHandle::_vmentry_offset;
2316 int java_lang_invoke_MethodHandle::_vmslots_offset;
2318 int java_lang_invoke_MemberName::_clazz_offset;
2319 int java_lang_invoke_MemberName::_name_offset;
2320 int java_lang_invoke_MemberName::_type_offset;
2321 int java_lang_invoke_MemberName::_flags_offset;
2322 int java_lang_invoke_MemberName::_vmtarget_offset;
2323 int java_lang_invoke_MemberName::_vmindex_offset;
2325 int java_lang_invoke_DirectMethodHandle::_vmindex_offset;
2327 int java_lang_invoke_BoundMethodHandle::_argument_offset;
2328 int java_lang_invoke_BoundMethodHandle::_vmargslot_offset;
2330 int java_lang_invoke_AdapterMethodHandle::_conversion_offset;
2332 void java_lang_invoke_MethodHandle::compute_offsets() {
2333 klassOop k = SystemDictionary::MethodHandle_klass();
2334 if (k != NULL && EnableInvokeDynamic) {
2335 bool allow_super = false;
2336 if (AllowTransitionalJSR292) allow_super = true; // temporary, to access java.dyn.MethodHandleImpl
2337 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature(), allow_super);
2338 compute_offset(_vmtarget_offset, k, vmSymbols::vmtarget_name(), vmSymbols::object_signature(), allow_super);
2339 compute_offset(_vmentry_offset, k, vmSymbols::vmentry_name(), vmSymbols::machine_word_signature(), allow_super);
2341 // Note: MH.vmslots (if it is present) is a hoisted copy of MH.type.form.vmslots.
2342 // It is optional pending experiments to keep or toss.
2343 compute_optional_offset(_vmslots_offset, k, vmSymbols::vmslots_name(), vmSymbols::int_signature(), allow_super);
2344 }
2345 }
2347 void java_lang_invoke_MemberName::compute_offsets() {
2348 klassOop k = SystemDictionary::MemberName_klass();
2349 if (k != NULL && EnableInvokeDynamic) {
2350 compute_offset(_clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2351 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2352 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::object_signature());
2353 compute_offset(_flags_offset, k, vmSymbols::flags_name(), vmSymbols::int_signature());
2354 compute_offset(_vmtarget_offset, k, vmSymbols::vmtarget_name(), vmSymbols::object_signature());
2355 compute_offset(_vmindex_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature());
2356 }
2357 }
2359 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
2360 klassOop k = SystemDictionary::DirectMethodHandle_klass();
2361 if (k != NULL && EnableInvokeDynamic) {
2362 compute_offset(_vmindex_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature(), true);
2363 }
2364 }
2366 void java_lang_invoke_BoundMethodHandle::compute_offsets() {
2367 klassOop k = SystemDictionary::BoundMethodHandle_klass();
2368 if (k != NULL && EnableInvokeDynamic) {
2369 compute_offset(_vmargslot_offset, k, vmSymbols::vmargslot_name(), vmSymbols::int_signature(), true);
2370 compute_offset(_argument_offset, k, vmSymbols::argument_name(), vmSymbols::object_signature(), true);
2371 }
2372 }
2374 void java_lang_invoke_AdapterMethodHandle::compute_offsets() {
2375 klassOop k = SystemDictionary::AdapterMethodHandle_klass();
2376 if (k != NULL && EnableInvokeDynamic) {
2377 compute_offset(_conversion_offset, k, vmSymbols::conversion_name(), vmSymbols::int_signature(), true);
2378 }
2379 }
2381 oop java_lang_invoke_MethodHandle::type(oop mh) {
2382 return mh->obj_field(_type_offset);
2383 }
2385 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
2386 mh->obj_field_put(_type_offset, mtype);
2387 }
2389 int java_lang_invoke_MethodHandle::vmslots(oop mh) {
2390 int vmslots_offset = _vmslots_offset;
2391 if (vmslots_offset != 0) {
2392 #ifdef ASSERT
2393 int x = mh->int_field(vmslots_offset);
2394 int y = compute_vmslots(mh);
2395 assert(x == y, "correct hoisted value");
2396 #endif
2397 return mh->int_field(vmslots_offset);
2398 } else {
2399 return compute_vmslots(mh);
2400 }
2401 }
2403 // if MH.vmslots exists, hoist into it the value of type.form.vmslots
2404 void java_lang_invoke_MethodHandle::init_vmslots(oop mh) {
2405 int vmslots_offset = _vmslots_offset;
2406 if (vmslots_offset != 0) {
2407 mh->int_field_put(vmslots_offset, compute_vmslots(mh));
2408 }
2409 }
2411 // fetch type.form.vmslots, which is the number of JVM stack slots
2412 // required to carry the arguments of this MH
2413 int java_lang_invoke_MethodHandle::compute_vmslots(oop mh) {
2414 oop mtype = type(mh);
2415 if (mtype == NULL) return 0; // Java code would get NPE
2416 oop form = java_lang_invoke_MethodType::form(mtype);
2417 if (form == NULL) return 0; // Java code would get NPE
2418 return java_lang_invoke_MethodTypeForm::vmslots(form);
2419 }
2421 // fetch the low-level entry point for this mh
2422 MethodHandleEntry* java_lang_invoke_MethodHandle::vmentry(oop mh) {
2423 return (MethodHandleEntry*) mh->address_field(_vmentry_offset);
2424 }
2426 void java_lang_invoke_MethodHandle::set_vmentry(oop mh, MethodHandleEntry* me) {
2427 assert(_vmentry_offset != 0, "must be present");
2429 // This is always the final step that initializes a valid method handle:
2430 mh->release_address_field_put(_vmentry_offset, (address) me);
2432 // There should be enough memory barriers on exit from native methods
2433 // to ensure that the MH is fully initialized to all threads before
2434 // Java code can publish it in global data structures.
2435 // But just in case, we use release_address_field_put.
2436 }
2438 /// MemberName accessors
2440 oop java_lang_invoke_MemberName::clazz(oop mname) {
2441 assert(is_instance(mname), "wrong type");
2442 return mname->obj_field(_clazz_offset);
2443 }
2445 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
2446 assert(is_instance(mname), "wrong type");
2447 mname->obj_field_put(_clazz_offset, clazz);
2448 }
2450 oop java_lang_invoke_MemberName::name(oop mname) {
2451 assert(is_instance(mname), "wrong type");
2452 return mname->obj_field(_name_offset);
2453 }
2455 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
2456 assert(is_instance(mname), "wrong type");
2457 mname->obj_field_put(_name_offset, name);
2458 }
2460 oop java_lang_invoke_MemberName::type(oop mname) {
2461 assert(is_instance(mname), "wrong type");
2462 return mname->obj_field(_type_offset);
2463 }
2465 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
2466 assert(is_instance(mname), "wrong type");
2467 mname->obj_field_put(_type_offset, type);
2468 }
2470 int java_lang_invoke_MemberName::flags(oop mname) {
2471 assert(is_instance(mname), "wrong type");
2472 return mname->int_field(_flags_offset);
2473 }
2475 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
2476 assert(is_instance(mname), "wrong type");
2477 mname->int_field_put(_flags_offset, flags);
2478 }
2480 oop java_lang_invoke_MemberName::vmtarget(oop mname) {
2481 assert(is_instance(mname), "wrong type");
2482 return mname->obj_field(_vmtarget_offset);
2483 }
2485 void java_lang_invoke_MemberName::set_vmtarget(oop mname, oop ref) {
2486 assert(is_instance(mname), "wrong type");
2487 mname->obj_field_put(_vmtarget_offset, ref);
2488 }
2490 int java_lang_invoke_MemberName::vmindex(oop mname) {
2491 assert(is_instance(mname), "wrong type");
2492 return mname->int_field(_vmindex_offset);
2493 }
2495 void java_lang_invoke_MemberName::set_vmindex(oop mname, int index) {
2496 assert(is_instance(mname), "wrong type");
2497 mname->int_field_put(_vmindex_offset, index);
2498 }
2500 oop java_lang_invoke_MethodHandle::vmtarget(oop mh) {
2501 assert(is_instance(mh), "MH only");
2502 return mh->obj_field(_vmtarget_offset);
2503 }
2505 void java_lang_invoke_MethodHandle::set_vmtarget(oop mh, oop ref) {
2506 assert(is_instance(mh), "MH only");
2507 mh->obj_field_put(_vmtarget_offset, ref);
2508 }
2510 int java_lang_invoke_DirectMethodHandle::vmindex(oop mh) {
2511 assert(is_instance(mh), "DMH only");
2512 return mh->int_field(_vmindex_offset);
2513 }
2515 void java_lang_invoke_DirectMethodHandle::set_vmindex(oop mh, int index) {
2516 assert(is_instance(mh), "DMH only");
2517 mh->int_field_put(_vmindex_offset, index);
2518 }
2520 int java_lang_invoke_BoundMethodHandle::vmargslot(oop mh) {
2521 assert(is_instance(mh), "BMH only");
2522 return mh->int_field(_vmargslot_offset);
2523 }
2525 oop java_lang_invoke_BoundMethodHandle::argument(oop mh) {
2526 assert(is_instance(mh), "BMH only");
2527 return mh->obj_field(_argument_offset);
2528 }
2530 int java_lang_invoke_AdapterMethodHandle::conversion(oop mh) {
2531 assert(is_instance(mh), "AMH only");
2532 return mh->int_field(_conversion_offset);
2533 }
2535 void java_lang_invoke_AdapterMethodHandle::set_conversion(oop mh, int conv) {
2536 assert(is_instance(mh), "AMH only");
2537 mh->int_field_put(_conversion_offset, conv);
2538 }
2541 // Support for java_lang_invoke_MethodType
2543 int java_lang_invoke_MethodType::_rtype_offset;
2544 int java_lang_invoke_MethodType::_ptypes_offset;
2545 int java_lang_invoke_MethodType::_form_offset;
2547 void java_lang_invoke_MethodType::compute_offsets() {
2548 klassOop k = SystemDictionary::MethodType_klass();
2549 if (k != NULL) {
2550 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2551 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2552 compute_offset(_form_offset, k, vmSymbols::form_name(), vmSymbols::java_lang_invoke_MethodTypeForm_signature());
2553 }
2554 }
2556 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
2557 st->print("(");
2558 objArrayOop pts = ptypes(mt);
2559 for (int i = 0, limit = pts->length(); i < limit; i++) {
2560 java_lang_Class::print_signature(pts->obj_at(i), st);
2561 }
2562 st->print(")");
2563 java_lang_Class::print_signature(rtype(mt), st);
2564 }
2566 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2567 ResourceMark rm;
2568 stringStream buffer(128);
2569 print_signature(mt, &buffer);
2570 const char* sigstr = buffer.base();
2571 int siglen = (int) buffer.size();
2572 Symbol *name;
2573 if (!intern_if_not_found) {
2574 name = SymbolTable::probe(sigstr, siglen);
2575 } else {
2576 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2577 }
2578 return name;
2579 }
2581 oop java_lang_invoke_MethodType::rtype(oop mt) {
2582 assert(is_instance(mt), "must be a MethodType");
2583 return mt->obj_field(_rtype_offset);
2584 }
2586 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
2587 assert(is_instance(mt), "must be a MethodType");
2588 return (objArrayOop) mt->obj_field(_ptypes_offset);
2589 }
2591 oop java_lang_invoke_MethodType::form(oop mt) {
2592 assert(is_instance(mt), "must be a MethodType");
2593 return mt->obj_field(_form_offset);
2594 }
2596 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
2597 return ptypes(mt)->obj_at(idx);
2598 }
2600 int java_lang_invoke_MethodType::ptype_count(oop mt) {
2601 return ptypes(mt)->length();
2602 }
2606 // Support for java_lang_invoke_MethodTypeForm
2608 int java_lang_invoke_MethodTypeForm::_vmslots_offset;
2609 int java_lang_invoke_MethodTypeForm::_erasedType_offset;
2610 int java_lang_invoke_MethodTypeForm::_genericInvoker_offset;
2612 void java_lang_invoke_MethodTypeForm::compute_offsets() {
2613 klassOop k = SystemDictionary::MethodTypeForm_klass();
2614 if (k != NULL) {
2615 compute_optional_offset(_vmslots_offset, k, vmSymbols::vmslots_name(), vmSymbols::int_signature(), true);
2616 compute_optional_offset(_erasedType_offset, k, vmSymbols::erasedType_name(), vmSymbols::java_lang_invoke_MethodType_signature(), true);
2617 compute_optional_offset(_genericInvoker_offset, k, vmSymbols::genericInvoker_name(), vmSymbols::java_lang_invoke_MethodHandle_signature(), true);
2618 if (_genericInvoker_offset == 0) _genericInvoker_offset = -1; // set to explicit "empty" value
2619 }
2620 }
2622 int java_lang_invoke_MethodTypeForm::vmslots(oop mtform) {
2623 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only");
2624 return mtform->int_field(_vmslots_offset);
2625 }
2627 oop java_lang_invoke_MethodTypeForm::erasedType(oop mtform) {
2628 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only");
2629 return mtform->obj_field(_erasedType_offset);
2630 }
2632 oop java_lang_invoke_MethodTypeForm::genericInvoker(oop mtform) {
2633 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only");
2634 return mtform->obj_field(_genericInvoker_offset);
2635 }
2638 // Support for java_lang_invoke_CallSite
2640 int java_lang_invoke_CallSite::_target_offset;
2642 void java_lang_invoke_CallSite::compute_offsets() {
2643 if (!EnableInvokeDynamic) return;
2644 klassOop k = SystemDictionary::CallSite_klass();
2645 if (k != NULL) {
2646 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
2647 }
2648 }
2650 oop java_lang_invoke_CallSite::target(oop site) {
2651 return site->obj_field(_target_offset);
2652 }
2654 void java_lang_invoke_CallSite::set_target(oop site, oop target) {
2655 site->obj_field_put(_target_offset, target);
2656 }
2659 // Support for java_security_AccessControlContext
2661 int java_security_AccessControlContext::_context_offset = 0;
2662 int java_security_AccessControlContext::_privilegedContext_offset = 0;
2663 int java_security_AccessControlContext::_isPrivileged_offset = 0;
2665 void java_security_AccessControlContext::compute_offsets() {
2666 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
2667 fieldDescriptor fd;
2668 instanceKlass* ik = instanceKlass::cast(SystemDictionary::AccessControlContext_klass());
2670 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
2671 fatal("Invalid layout of java.security.AccessControlContext");
2672 }
2673 _context_offset = fd.offset();
2675 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
2676 fatal("Invalid layout of java.security.AccessControlContext");
2677 }
2678 _privilegedContext_offset = fd.offset();
2680 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
2681 fatal("Invalid layout of java.security.AccessControlContext");
2682 }
2683 _isPrivileged_offset = fd.offset();
2684 }
2687 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
2688 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
2689 // Ensure klass is initialized
2690 instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
2691 // Allocate result
2692 oop result = instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
2693 // Fill in values
2694 result->obj_field_put(_context_offset, context());
2695 result->obj_field_put(_privilegedContext_offset, privileged_context());
2696 result->bool_field_put(_isPrivileged_offset, isPrivileged);
2697 return result;
2698 }
2701 // Support for java_lang_ClassLoader
2703 oop java_lang_ClassLoader::parent(oop loader) {
2704 assert(loader->is_oop(), "loader must be oop");
2705 return loader->obj_field(parent_offset);
2706 }
2709 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
2710 // Fix for 4474172; see evaluation for more details
2711 loader = non_reflection_class_loader(loader);
2713 oop cl = SystemDictionary::java_system_loader();
2714 while(cl != NULL) {
2715 if (cl == loader) return true;
2716 cl = parent(cl);
2717 }
2718 return false;
2719 }
2721 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
2722 if (loader != NULL) {
2723 // See whether this is one of the class loaders associated with
2724 // the generated bytecodes for reflection, and if so, "magically"
2725 // delegate to its parent to prevent class loading from occurring
2726 // in places where applications using reflection didn't expect it.
2727 klassOop delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
2728 // This might be null in non-1.4 JDKs
2729 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
2730 return parent(loader);
2731 }
2732 }
2733 return loader;
2734 }
2737 // Support for java_lang_System
2738 int java_lang_System::in_offset_in_bytes() {
2739 return (instanceMirrorKlass::offset_of_static_fields() + static_in_offset);
2740 }
2743 int java_lang_System::out_offset_in_bytes() {
2744 return (instanceMirrorKlass::offset_of_static_fields() + static_out_offset);
2745 }
2748 int java_lang_System::err_offset_in_bytes() {
2749 return (instanceMirrorKlass::offset_of_static_fields() + static_err_offset);
2750 }
2754 int java_lang_String::value_offset;
2755 int java_lang_String::offset_offset;
2756 int java_lang_String::count_offset;
2757 int java_lang_String::hash_offset;
2758 int java_lang_Class::klass_offset;
2759 int java_lang_Class::array_klass_offset;
2760 int java_lang_Class::resolved_constructor_offset;
2761 int java_lang_Class::number_of_fake_oop_fields;
2762 int java_lang_Class::oop_size_offset;
2763 int java_lang_Class::static_oop_field_count_offset;
2764 int java_lang_Throwable::backtrace_offset;
2765 int java_lang_Throwable::detailMessage_offset;
2766 int java_lang_Throwable::cause_offset;
2767 int java_lang_Throwable::stackTrace_offset;
2768 int java_lang_reflect_AccessibleObject::override_offset;
2769 int java_lang_reflect_Method::clazz_offset;
2770 int java_lang_reflect_Method::name_offset;
2771 int java_lang_reflect_Method::returnType_offset;
2772 int java_lang_reflect_Method::parameterTypes_offset;
2773 int java_lang_reflect_Method::exceptionTypes_offset;
2774 int java_lang_reflect_Method::slot_offset;
2775 int java_lang_reflect_Method::modifiers_offset;
2776 int java_lang_reflect_Method::signature_offset;
2777 int java_lang_reflect_Method::annotations_offset;
2778 int java_lang_reflect_Method::parameter_annotations_offset;
2779 int java_lang_reflect_Method::annotation_default_offset;
2780 int java_lang_reflect_Constructor::clazz_offset;
2781 int java_lang_reflect_Constructor::parameterTypes_offset;
2782 int java_lang_reflect_Constructor::exceptionTypes_offset;
2783 int java_lang_reflect_Constructor::slot_offset;
2784 int java_lang_reflect_Constructor::modifiers_offset;
2785 int java_lang_reflect_Constructor::signature_offset;
2786 int java_lang_reflect_Constructor::annotations_offset;
2787 int java_lang_reflect_Constructor::parameter_annotations_offset;
2788 int java_lang_reflect_Field::clazz_offset;
2789 int java_lang_reflect_Field::name_offset;
2790 int java_lang_reflect_Field::type_offset;
2791 int java_lang_reflect_Field::slot_offset;
2792 int java_lang_reflect_Field::modifiers_offset;
2793 int java_lang_reflect_Field::signature_offset;
2794 int java_lang_reflect_Field::annotations_offset;
2795 int java_lang_boxing_object::value_offset;
2796 int java_lang_boxing_object::long_value_offset;
2797 int java_lang_ref_Reference::referent_offset;
2798 int java_lang_ref_Reference::queue_offset;
2799 int java_lang_ref_Reference::next_offset;
2800 int java_lang_ref_Reference::discovered_offset;
2801 int java_lang_ref_Reference::static_lock_offset;
2802 int java_lang_ref_Reference::static_pending_offset;
2803 int java_lang_ref_Reference::number_of_fake_oop_fields;
2804 int java_lang_ref_SoftReference::timestamp_offset;
2805 int java_lang_ref_SoftReference::static_clock_offset;
2806 int java_lang_ClassLoader::parent_offset;
2807 int java_lang_System::static_in_offset;
2808 int java_lang_System::static_out_offset;
2809 int java_lang_System::static_err_offset;
2810 int java_lang_StackTraceElement::declaringClass_offset;
2811 int java_lang_StackTraceElement::methodName_offset;
2812 int java_lang_StackTraceElement::fileName_offset;
2813 int java_lang_StackTraceElement::lineNumber_offset;
2814 int java_lang_AssertionStatusDirectives::classes_offset;
2815 int java_lang_AssertionStatusDirectives::classEnabled_offset;
2816 int java_lang_AssertionStatusDirectives::packages_offset;
2817 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
2818 int java_lang_AssertionStatusDirectives::deflt_offset;
2819 int java_nio_Buffer::_limit_offset;
2820 int sun_misc_AtomicLongCSImpl::_value_offset;
2821 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
2822 int sun_reflect_ConstantPool::_cp_oop_offset;
2823 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
2826 // Support for java_lang_StackTraceElement
2828 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
2829 element->obj_field_put(fileName_offset, value);
2830 }
2832 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
2833 element->obj_field_put(declaringClass_offset, value);
2834 }
2836 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
2837 element->obj_field_put(methodName_offset, value);
2838 }
2840 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
2841 element->int_field_put(lineNumber_offset, value);
2842 }
2845 // Support for java Assertions - java_lang_AssertionStatusDirectives.
2847 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
2848 o->obj_field_put(classes_offset, val);
2849 }
2851 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
2852 o->obj_field_put(classEnabled_offset, val);
2853 }
2855 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
2856 o->obj_field_put(packages_offset, val);
2857 }
2859 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
2860 o->obj_field_put(packageEnabled_offset, val);
2861 }
2863 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
2864 o->bool_field_put(deflt_offset, val);
2865 }
2868 // Support for intrinsification of java.nio.Buffer.checkIndex
2869 int java_nio_Buffer::limit_offset() {
2870 return _limit_offset;
2871 }
2874 void java_nio_Buffer::compute_offsets() {
2875 klassOop k = SystemDictionary::java_nio_Buffer_klass();
2876 assert(k != NULL, "must be loaded in 1.4+");
2877 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
2878 }
2880 // Support for intrinsification of sun.misc.AtomicLongCSImpl.attemptUpdate
2881 int sun_misc_AtomicLongCSImpl::value_offset() {
2882 assert(SystemDictionary::sun_misc_AtomicLongCSImpl_klass() != NULL, "can't call this");
2883 return _value_offset;
2884 }
2887 void sun_misc_AtomicLongCSImpl::compute_offsets() {
2888 klassOop k = SystemDictionary::sun_misc_AtomicLongCSImpl_klass();
2889 // If this class is not present, its value field offset won't be referenced.
2890 if (k != NULL) {
2891 compute_offset(_value_offset, k, vmSymbols::value_name(), vmSymbols::long_signature());
2892 }
2893 }
2895 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
2896 if (_owner_offset != 0) return;
2898 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
2899 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
2900 klassOop k = SystemDictionary::abstract_ownable_synchronizer_klass();
2901 compute_offset(_owner_offset, k,
2902 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
2903 }
2905 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
2906 assert(_owner_offset != 0, "Must be initialized");
2907 return obj->obj_field(_owner_offset);
2908 }
2910 // Compute hard-coded offsets
2911 // Invoked before SystemDictionary::initialize, so pre-loaded classes
2912 // are not available to determine the offset_of_static_fields.
2913 void JavaClasses::compute_hard_coded_offsets() {
2914 const int x = heapOopSize;
2915 const int header = instanceOopDesc::base_offset_in_bytes();
2917 // Do the String Class
2918 java_lang_String::value_offset = java_lang_String::hc_value_offset * x + header;
2919 java_lang_String::offset_offset = java_lang_String::hc_offset_offset * x + header;
2920 java_lang_String::count_offset = java_lang_String::offset_offset + sizeof (jint);
2921 java_lang_String::hash_offset = java_lang_String::count_offset + sizeof (jint);
2923 {
2924 // Do the Class Class
2925 int offset = header;
2926 java_lang_Class::oop_size_offset = header;
2927 offset += BytesPerInt;
2928 java_lang_Class::static_oop_field_count_offset = offset;
2929 offset = align_size_up(offset + BytesPerInt, x);
2930 java_lang_Class::klass_offset = offset;
2931 offset += x;
2932 java_lang_Class::array_klass_offset = offset;
2933 offset += x;
2934 java_lang_Class::resolved_constructor_offset = offset;
2935 }
2937 // This is NOT an offset
2938 java_lang_Class::number_of_fake_oop_fields = java_lang_Class::hc_number_of_fake_oop_fields;
2940 // Throwable Class
2941 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
2942 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
2943 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
2944 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
2946 // java_lang_boxing_object
2947 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
2948 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
2950 // java_lang_ref_Reference:
2951 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
2952 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
2953 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
2954 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
2955 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
2956 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
2957 // Artificial fields for java_lang_ref_Reference
2958 // The first field is for the discovered field added in 1.4
2959 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
2961 // java_lang_ref_SoftReference Class
2962 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
2963 // Don't multiply static fields because they are always in wordSize units
2964 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
2966 // java_lang_ClassLoader
2967 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
2969 // java_lang_System
2970 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
2971 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
2972 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
2974 // java_lang_StackTraceElement
2975 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
2976 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
2977 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
2978 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
2979 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
2980 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
2981 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
2982 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
2983 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
2985 }
2988 // Compute non-hard-coded field offsets of all the classes in this file
2989 void JavaClasses::compute_offsets() {
2991 java_lang_Class::compute_offsets();
2992 java_lang_Thread::compute_offsets();
2993 java_lang_ThreadGroup::compute_offsets();
2994 if (EnableInvokeDynamic) {
2995 java_lang_invoke_MethodHandle::compute_offsets();
2996 java_lang_invoke_MemberName::compute_offsets();
2997 java_lang_invoke_DirectMethodHandle::compute_offsets();
2998 java_lang_invoke_BoundMethodHandle::compute_offsets();
2999 java_lang_invoke_AdapterMethodHandle::compute_offsets();
3000 java_lang_invoke_MethodType::compute_offsets();
3001 java_lang_invoke_MethodTypeForm::compute_offsets();
3002 java_lang_invoke_CallSite::compute_offsets();
3003 }
3004 java_security_AccessControlContext::compute_offsets();
3005 // Initialize reflection classes. The layouts of these classes
3006 // changed with the new reflection implementation in JDK 1.4, and
3007 // since the Universe doesn't know what JDK version it is until this
3008 // point we defer computation of these offsets until now.
3009 java_lang_reflect_AccessibleObject::compute_offsets();
3010 java_lang_reflect_Method::compute_offsets();
3011 java_lang_reflect_Constructor::compute_offsets();
3012 java_lang_reflect_Field::compute_offsets();
3013 if (JDK_Version::is_gte_jdk14x_version()) {
3014 java_nio_Buffer::compute_offsets();
3015 }
3016 if (JDK_Version::is_gte_jdk15x_version()) {
3017 sun_reflect_ConstantPool::compute_offsets();
3018 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3019 }
3020 sun_misc_AtomicLongCSImpl::compute_offsets();
3022 // generated interpreter code wants to know about the offsets we just computed:
3023 AbstractAssembler::update_delayed_values();
3024 }
3026 #ifndef PRODUCT
3028 // These functions exist to assert the validity of hard-coded field offsets to guard
3029 // against changes in the class files
3031 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3032 EXCEPTION_MARK;
3033 fieldDescriptor fd;
3034 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3035 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3036 instanceKlassHandle h_klass (THREAD, k);
3037 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3038 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3039 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3040 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3041 return false;
3042 }
3043 if (fd.is_static()) {
3044 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3045 return false;
3046 }
3047 if (fd.offset() == hardcoded_offset ) {
3048 return true;
3049 } else {
3050 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3051 klass_name, field_name, hardcoded_offset, fd.offset());
3052 return false;
3053 }
3054 }
3057 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3058 EXCEPTION_MARK;
3059 fieldDescriptor fd;
3060 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3061 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3062 instanceKlassHandle h_klass (THREAD, k);
3063 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3064 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3065 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3066 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3067 return false;
3068 }
3069 if (!fd.is_static()) {
3070 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3071 return false;
3072 }
3073 if (fd.offset() == hardcoded_offset + instanceMirrorKlass::offset_of_static_fields()) {
3074 return true;
3075 } else {
3076 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() - instanceMirrorKlass::offset_of_static_fields());
3077 return false;
3078 }
3079 }
3082 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3083 EXCEPTION_MARK;
3084 fieldDescriptor fd;
3085 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3086 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3087 instanceKlassHandle h_klass (THREAD, k);
3088 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3089 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3090 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3091 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3092 return false;
3093 }
3094 if (!fd.is_static() || !fd.has_initial_value()) {
3095 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3096 return false;
3097 }
3098 if (!fd.initial_value_tag().is_int()) {
3099 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3100 return false;
3101 }
3102 jint field_value = fd.int_initial_value();
3103 if (field_value == hardcoded_constant) {
3104 return true;
3105 } else {
3106 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);
3107 return false;
3108 }
3109 }
3112 // Check the hard-coded field offsets of all the classes in this file
3114 void JavaClasses::check_offsets() {
3115 bool valid = true;
3117 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3118 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3120 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3121 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3123 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3124 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3126 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3127 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3129 // java.lang.String
3131 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3132 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3133 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3134 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3136 // java.lang.Class
3138 // Fake fields
3139 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3140 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3141 // CHECK_OFFSET("java/lang/Class", java_lang_Class, resolved_constructor); // %%% this needs to be checked
3143 // java.lang.Throwable
3145 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3146 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3147 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3148 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3150 // Boxed primitive objects (java_lang_boxing_object)
3152 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3153 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3154 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3155 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3156 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3157 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3158 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3159 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3161 // java.lang.ClassLoader
3163 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3165 // java.lang.System
3167 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3168 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3169 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3171 // java.lang.StackTraceElement
3173 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3174 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3175 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3176 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3178 // java.lang.ref.Reference
3180 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3181 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3182 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3183 // Fake field
3184 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3185 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3186 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3188 // java.lang.ref.SoftReference
3190 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3191 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3193 // java.lang.AssertionStatusDirectives
3194 //
3195 // The CheckAssertionStatusDirectives boolean can be removed from here and
3196 // globals.hpp after the AssertionStatusDirectives class has been integrated
3197 // into merlin "for some time." Without it, the vm will fail with early
3198 // merlin builds.
3200 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) {
3201 const char* nm = "java/lang/AssertionStatusDirectives";
3202 const char* sig = "[Ljava/lang/String;";
3203 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3204 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3205 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3206 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3207 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3208 }
3210 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3211 }
3213 #endif // PRODUCT
3215 void javaClasses_init() {
3216 JavaClasses::compute_offsets();
3217 JavaClasses::check_offsets();
3218 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3219 }