1 /*
2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/altHashing.hpp"
27 #include "classfile/javaClasses.inline.hpp"
28 #include "classfile/stringTable.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "code/debugInfo.hpp"
31 #include "code/pcDesc.hpp"
32 #include "interpreter/interpreter.hpp"
33 #include "memory/oopFactory.hpp"
34 #include "memory/resourceArea.hpp"
35 #include "memory/universe.inline.hpp"
36 #include "oops/fieldStreams.hpp"
37 #include "oops/instanceKlass.hpp"
38 #include "oops/instanceMirrorKlass.hpp"
39 #include "oops/klass.hpp"
40 #include "oops/method.hpp"
41 #include "oops/objArrayOop.inline.hpp"
42 #include "oops/oop.inline.hpp"
43 #include "oops/symbol.hpp"
44 #include "oops/typeArrayOop.hpp"
45 #include "prims/jvmtiRedefineClassesTrace.hpp"
46 #include "runtime/fieldDescriptor.hpp"
47 #include "runtime/handles.inline.hpp"
48 #include "runtime/interfaceSupport.hpp"
49 #include "runtime/java.hpp"
50 #include "runtime/javaCalls.hpp"
51 #include "runtime/safepoint.hpp"
52 #include "runtime/thread.inline.hpp"
53 #include "runtime/vframe.hpp"
54 #include "utilities/preserveException.hpp"
55
56 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
57
58 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
59 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
60
61 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
62 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
63
64 InjectedField JavaClasses::_injected_fields[] = {
65 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
66 };
67
68 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
69 return _injected_fields[id].compute_offset();
70 }
71
72
73 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
74 *field_count = 0;
75
76 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
77 if (sid == vmSymbols::NO_SID) {
78 // Only well known classes can inject fields
79 return NULL;
80 }
81
82 int count = 0;
83 int start = -1;
84
85 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
86 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
87 count++; \
88 if (start == -1) start = klass##_##name##_enum; \
89 }
90 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
91 #undef LOOKUP_INJECTED_FIELD
92
93 if (start != -1) {
94 *field_count = count;
95 return _injected_fields + start;
96 }
97 return NULL;
98 }
99
100
101 static bool find_field(InstanceKlass* ik,
102 Symbol* name_symbol, Symbol* signature_symbol,
103 fieldDescriptor* fd,
104 bool is_static = false, bool allow_super = false) {
105 if (allow_super || is_static) {
106 return ik->find_field(name_symbol, signature_symbol, is_static, fd) != NULL;
107 } else {
108 return ik->find_local_field(name_symbol, signature_symbol, fd);
109 }
110 }
111
112 // Helpful routine for computing field offsets at run time rather than hardcoding them
113 static void
114 compute_offset(int &dest_offset,
115 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
116 bool is_static = false, bool allow_super = false) {
117 fieldDescriptor fd;
118 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
119 if (!find_field(ik, name_symbol, signature_symbol, &fd, is_static, allow_super)) {
120 ResourceMark rm;
121 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
122 #ifndef PRODUCT
123 klass_oop->print();
124 tty->print_cr("all fields:");
125 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
126 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
127 }
128 #endif //PRODUCT
129 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class");
130 }
131 dest_offset = fd.offset();
132 }
133
134 // Same as above but for "optional" offsets that might not be present in certain JDK versions
135 static void
136 compute_optional_offset(int& dest_offset,
137 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
138 bool allow_super = false) {
139 fieldDescriptor fd;
140 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
141 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
142 dest_offset = fd.offset();
143 }
144 }
145
146
147 int java_lang_String::value_offset = 0;
148 int java_lang_String::offset_offset = 0;
149 int java_lang_String::count_offset = 0;
150 int java_lang_String::hash_offset = 0;
151
152 bool java_lang_String::initialized = false;
153
154 bool java_lang_String::is_instance(oop obj) {
155 return is_instance_inlined(obj);
156 }
157
158 void java_lang_String::compute_offsets() {
159 assert(!initialized, "offsets should be initialized only once");
160
161 Klass* k = SystemDictionary::String_klass();
162 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature());
163 compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature());
164 compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature());
165 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature());
166
167 initialized = true;
168 }
169
170 Handle java_lang_String::basic_create(int length, TRAPS) {
171 assert(initialized, "Must be initialized");
172 // Create the String object first, so there's a chance that the String
173 // and the char array it points to end up in the same cache line.
174 oop obj;
175 obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH);
176
177 // Create the char array. The String object must be handlized here
178 // because GC can happen as a result of the allocation attempt.
179 Handle h_obj(THREAD, obj);
180 typeArrayOop buffer;
181 buffer = oopFactory::new_charArray(length, CHECK_NH);
182
183 // Point the String at the char array
184 obj = h_obj();
185 set_value(obj, buffer);
186 // No need to zero the offset, allocation zero'ed the entire String object
187 assert(offset(obj) == 0, "initial String offset should be zero");
188 //set_offset(obj, 0);
189 set_count(obj, length);
190
191 return h_obj;
192 }
193
194 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
195 Handle h_obj = basic_create(length, CHECK_NH);
196 typeArrayOop buffer = value(h_obj());
197 for (int index = 0; index < length; index++) {
198 buffer->char_at_put(index, unicode[index]);
199 }
200 return h_obj;
201 }
202
203 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
204 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
205 return h_obj();
206 }
207
208 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
209 if (utf8_str == NULL) {
210 return Handle();
211 }
212 int length = UTF8::unicode_length(utf8_str);
213 Handle h_obj = basic_create(length, CHECK_NH);
214 if (length > 0) {
215 typeArrayOop buffer = value(h_obj());
216 buffer = typeArrayOop(oopDesc::bs()->resolve_and_maybe_copy_oop(buffer));
217 UTF8::convert_to_unicode(utf8_str, buffer->char_at_addr(0), length);
218 }
219 return h_obj;
220 }
221
222 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
223 Handle h_obj = create_from_str(utf8_str, CHECK_0);
224 return h_obj();
225 }
226
227 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
228 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
229 Handle h_obj = basic_create(length, CHECK_NH);
230 if (length > 0) {
231 typeArrayOop buffer = value(h_obj());
232 buffer = typeArrayOop(oopDesc::bs()->resolve_and_maybe_copy_oop(buffer));
233 UTF8::convert_to_unicode((char*)symbol->bytes(), buffer->char_at_addr(0), length);
234 }
235 return h_obj;
236 }
237
238 // Converts a C string to a Java String based on current encoding
239 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
240 assert(str != NULL, "bad arguments");
241
242 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
243 static to_java_string_fn_t _to_java_string_fn = NULL;
244
245 if (_to_java_string_fn == NULL) {
246 void *lib_handle = os::native_java_library();
247 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
248 if (_to_java_string_fn == NULL) {
249 fatal("NewStringPlatform missing");
250 }
251 }
252
253 jstring js = NULL;
254 { JavaThread* thread = (JavaThread*)THREAD;
255 assert(thread->is_Java_thread(), "must be java thread");
256 HandleMark hm(thread);
257 ThreadToNativeFromVM ttn(thread);
258 js = (_to_java_string_fn)(thread->jni_environment(), str);
259 }
260 return Handle(THREAD, JNIHandles::resolve(js));
261 }
262
263 // Converts a Java String to a native C string that can be used for
264 // native OS calls.
265 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
266
267 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
268 static to_platform_string_fn_t _to_platform_string_fn = NULL;
269
270 if (_to_platform_string_fn == NULL) {
271 void *lib_handle = os::native_java_library();
272 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
273 if (_to_platform_string_fn == NULL) {
274 fatal("GetStringPlatformChars missing");
275 }
276 }
277
278 char *native_platform_string;
279 { JavaThread* thread = (JavaThread*)THREAD;
280 assert(thread->is_Java_thread(), "must be java thread");
281 JNIEnv *env = thread->jni_environment();
282 jstring js = (jstring) JNIHandles::make_local(env, java_string());
283 bool is_copy;
284 HandleMark hm(thread);
285 ThreadToNativeFromVM ttn(thread);
286 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
287 assert(is_copy == JNI_TRUE, "is_copy value changed");
288 JNIHandles::destroy_local(js);
289 }
290 return native_platform_string;
291 }
292
293 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
294 oop obj = java_string();
295 // Typical usage is to convert all '/' to '.' in string.
296 typeArrayOop value = java_lang_String::value(obj);
297 int offset = java_lang_String::offset(obj);
298 int length = java_lang_String::length(obj);
299
300 // First check if any from_char exist
301 int index; // Declared outside, used later
302 for (index = 0; index < length; index++) {
303 if (value->char_at(index + offset) == from_char) {
304 break;
305 }
306 }
307 if (index == length) {
308 // No from_char, so do not copy.
309 return java_string;
310 }
311
312 // Create new UNICODE buffer. Must handlize value because GC
313 // may happen during String and char array creation.
314 typeArrayHandle h_value(THREAD, value);
315 Handle string = basic_create(length, CHECK_NH);
316
317 typeArrayOop from_buffer = h_value();
318 typeArrayOop to_buffer = java_lang_String::value(string());
319
320 // Copy contents
321 for (index = 0; index < length; index++) {
322 jchar c = from_buffer->char_at(index + offset);
323 if (c == from_char) {
324 c = to_char;
325 }
326 to_buffer->char_at_put(index, c);
327 }
328 return string;
329 }
330
331 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
332 typeArrayOop value = java_lang_String::value(java_string);
333 int offset = java_lang_String::offset(java_string);
334 length = java_lang_String::length(java_string);
335
336 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
337 if (result != NULL) {
338 for (int index = 0; index < length; index++) {
339 result[index] = value->char_at(index + offset);
340 }
341 } else {
342 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
343 }
344 return result;
345 }
346
347 unsigned int java_lang_String::hash_code(oop java_string) {
348 int length = java_lang_String::length(java_string);
349 // Zero length string will hash to zero with String.hashCode() function.
350 if (length == 0) return 0;
351
352 typeArrayOop value = java_lang_String::value(java_string);
353 int offset = java_lang_String::offset(java_string);
354 value = typeArrayOop(oopDesc::bs()->resolve_oop(value));
355 return java_lang_String::hash_code(value->char_at_addr(offset), length);
356 }
357
358 char* java_lang_String::as_quoted_ascii(oop java_string) {
359 typeArrayOop value = java_lang_String::value(java_string);
360 int offset = java_lang_String::offset(java_string);
361 int length = java_lang_String::length(java_string);
362
363 value = typeArrayOop(oopDesc::bs()->resolve_oop(value));
364 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
365 if (base == NULL) return NULL;
366
367 int result_length = UNICODE::quoted_ascii_length(base, length) + 1;
368 char* result = NEW_RESOURCE_ARRAY(char, result_length);
369 UNICODE::as_quoted_ascii(base, length, result, result_length);
370 assert(result_length >= length + 1, "must not be shorter");
371 assert(result_length == (int)strlen(result) + 1, "must match");
372 return result;
373 }
374
375 unsigned int java_lang_String::hash_string(oop java_string) {
376 int length = java_lang_String::length(java_string);
377 // Zero length string doesn't hash necessarily hash to zero.
378 if (length == 0) {
379 return StringTable::hash_string(NULL, 0);
380 }
381
382 typeArrayOop value = java_lang_String::value(java_string);
383 int offset = java_lang_String::offset(java_string);
384 value = typeArrayOop(oopDesc::bs()->resolve_oop(value));
385 return StringTable::hash_string(value->char_at_addr(offset), length);
386 }
387
388 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {
389 oop obj = java_string();
390 typeArrayOop value = java_lang_String::value(obj);
391 int offset = java_lang_String::offset(obj);
392 int length = java_lang_String::length(obj);
393 value = typeArrayOop(oopDesc::bs()->resolve_oop(value));
394 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
395 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
396 return sym;
397 }
398
399 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
400 typeArrayOop value = java_lang_String::value(java_string);
401 int offset = java_lang_String::offset(java_string);
402 int length = java_lang_String::length(java_string);
403 value = typeArrayOop(oopDesc::bs()->resolve_oop(value));
404 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
405 return SymbolTable::probe_unicode(base, length);
406 }
407
408
409 int java_lang_String::utf8_length(oop java_string) {
410 typeArrayOop value = java_lang_String::value(java_string);
411 int offset = java_lang_String::offset(java_string);
412 int length = java_lang_String::length(java_string);
413 value = typeArrayOop(oopDesc::bs()->resolve_oop(value));
414 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
415 return UNICODE::utf8_length(position, length);
416 }
417
418 char* java_lang_String::as_utf8_string(oop java_string) {
419 typeArrayOop value = java_lang_String::value(java_string);
420 int offset = java_lang_String::offset(java_string);
421 int length = java_lang_String::length(java_string);
422 value = typeArrayOop(oopDesc::bs()->resolve_oop(value));
423 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
424 return UNICODE::as_utf8(position, length);
425 }
426
427 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
428 typeArrayOop value = java_lang_String::value(java_string);
429 int offset = java_lang_String::offset(java_string);
430 int length = java_lang_String::length(java_string);
431 value = typeArrayOop(oopDesc::bs()->resolve_oop(value));
432 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
433 return UNICODE::as_utf8(position, length, buf, buflen);
434 }
435
436 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
437 typeArrayOop value = java_lang_String::value(java_string);
438 int offset = java_lang_String::offset(java_string);
439 int length = java_lang_String::length(java_string);
440 assert(start + len <= length, "just checking");
441 value = typeArrayOop(oopDesc::bs()->resolve_oop(value));
442 jchar* position = value->char_at_addr(offset + start);
443 return UNICODE::as_utf8(position, len);
444 }
445
446 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) {
447 typeArrayOop value = java_lang_String::value(java_string);
448 int offset = java_lang_String::offset(java_string);
449 int length = java_lang_String::length(java_string);
450 assert(start + len <= length, "just checking");
451 value = typeArrayOop(oopDesc::bs()->resolve_oop(value));
452 jchar* position = value->char_at_addr(offset + start);
453 return UNICODE::as_utf8(position, len, buf, buflen);
454 }
455
456 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
457 assert(java_string->klass() == SystemDictionary::String_klass(),
458 "must be java_string");
459 typeArrayOop value = java_lang_String::value(java_string);
460 if (ShenandoahVerifyReadsToFromSpace) {
461 value = (typeArrayOop) oopDesc::bs()->resolve_oop(value);
462 }
463 int offset = java_lang_String::offset(java_string);
464 int length = java_lang_String::length(java_string);
465 if (length != len) {
466 return false;
467 }
468 for (int i = 0; i < len; i++) {
469 if (value->char_at(i + offset) != chars[i]) {
470 return false;
471 }
472 }
473 return true;
474 }
475
476 bool java_lang_String::equals(oop str1, oop str2) {
477 assert(str1->klass() == SystemDictionary::String_klass(),
478 "must be java String");
479 assert(str2->klass() == SystemDictionary::String_klass(),
480 "must be java String");
481 typeArrayOop value1 = java_lang_String::value(str1);
482 int offset1 = java_lang_String::offset(str1);
483 int length1 = java_lang_String::length(str1);
484 typeArrayOop value2 = java_lang_String::value(str2);
485 int offset2 = java_lang_String::offset(str2);
486 int length2 = java_lang_String::length(str2);
487
488 if (length1 != length2) {
489 return false;
490 }
491 for (int i = 0; i < length1; i++) {
492 if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) {
493 return false;
494 }
495 }
496 return true;
497 }
498
499 void java_lang_String::print(oop java_string, outputStream* st) {
500 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
501 typeArrayOop value = java_lang_String::value(java_string);
502
503 if (value == NULL) {
504 // This can happen if, e.g., printing a String
505 // object before its initializer has been called
506 st->print("NULL");
507 return;
508 }
509
510 int offset = java_lang_String::offset(java_string);
511 int length = java_lang_String::length(java_string);
512
513 st->print("\"");
514 for (int index = 0; index < length; index++) {
515 st->print("%c", value->char_at(index + offset));
516 }
517 st->print("\"");
518 }
519
520
521 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
522 assert(mirror.not_null() && fd->is_static(), "just checking");
523 if (fd->has_initial_value()) {
524 BasicType t = fd->field_type();
525 switch (t) {
526 case T_BYTE:
527 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
528 break;
529 case T_BOOLEAN:
530 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
531 break;
532 case T_CHAR:
533 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
534 break;
535 case T_SHORT:
536 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
537 break;
538 case T_INT:
539 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
540 break;
541 case T_FLOAT:
542 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
543 break;
544 case T_DOUBLE:
545 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
546 break;
547 case T_LONG:
548 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
549 break;
550 case T_OBJECT:
551 {
552 #ifdef ASSERT
553 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
554 assert(fd->signature() == sym, "just checking");
555 #endif
556 oop string = fd->string_initial_value(CHECK);
557 mirror()->obj_field_put(fd->offset(), string);
558 }
559 break;
560 default:
561 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
562 "Illegal ConstantValue attribute in class file");
563 }
564 }
565 }
566
567
568 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) {
569 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
570
571 // If the offset was read from the shared archive, it was fixed up already
572 if (!k->is_shared()) {
573 if (k->oop_is_instance()) {
574 // During bootstrap, java.lang.Class wasn't loaded so static field
575 // offsets were computed without the size added it. Go back and
576 // update all the static field offsets to included the size.
577 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) {
578 if (fs.access_flags().is_static()) {
579 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
580 fs.set_offset(real_offset);
581 }
582 }
583 }
584 }
585 create_mirror(k, Handle(NULL), Handle(NULL), CHECK);
586 }
587
588 void java_lang_Class::initialize_mirror_fields(KlassHandle k,
589 Handle mirror,
590 Handle protection_domain,
591 TRAPS) {
592 // Allocate a simple java object for a lock.
593 // This needs to be a java object because during class initialization
594 // it can be held across a java call.
595 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
596 set_init_lock(mirror(), r);
597
598 // Set protection domain also
599 set_protection_domain(mirror(), protection_domain());
600
601 // Initialize static fields
602 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK);
603 }
604
605 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader,
606 Handle protection_domain, TRAPS) {
607 assert(k->java_mirror() == NULL, "should only assign mirror once");
608 // Use this moment of initialization to cache modifier_flags also,
609 // to support Class.getModifiers(). Instance classes recalculate
610 // the cached flags after the class file is parsed, but before the
611 // class is put into the system dictionary.
612 int computed_modifiers = k->compute_modifier_flags(CHECK);
613 k->set_modifier_flags(computed_modifiers);
614 // Class_klass has to be loaded because it is used to allocate
615 // the mirror.
616 if (SystemDictionary::Class_klass_loaded()) {
617 // Allocate mirror (java.lang.Class instance)
618 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
619
620 // Setup indirection from mirror->klass
621 if (!k.is_null()) {
622 java_lang_Class::set_klass(mirror(), k());
623 }
624
625 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
626 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
627
628 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
629
630 // It might also have a component mirror. This mirror must already exist.
631 if (k->oop_is_array()) {
632 Handle comp_mirror;
633 if (k->oop_is_typeArray()) {
634 BasicType type = TypeArrayKlass::cast(k())->element_type();
635 comp_mirror = Universe::java_mirror(type);
636 } else {
637 assert(k->oop_is_objArray(), "Must be");
638 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass();
639 assert(element_klass != NULL, "Must have an element klass");
640 comp_mirror = element_klass->java_mirror();
641 }
642 assert(comp_mirror.not_null(), "must have a mirror");
643
644 // Two-way link between the array klass and its component mirror:
645 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
646 set_component_mirror(mirror(), comp_mirror());
647 set_array_klass(comp_mirror(), k());
648 } else {
649 assert(k->oop_is_instance(), "Must be");
650
651 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
652 if (HAS_PENDING_EXCEPTION) {
653 // If any of the fields throws an exception like OOM remove the klass field
654 // from the mirror so GC doesn't follow it after the klass has been deallocated.
655 // This mirror looks like a primitive type, which logically it is because it
656 // it represents no class.
657 java_lang_Class::set_klass(mirror(), NULL);
658 return;
659 }
660 }
661
662 // set the classLoader field in the java_lang_Class instance
663 assert(class_loader() == k->class_loader(), "should be same");
664 set_class_loader(mirror(), class_loader());
665
666 // Setup indirection from klass->mirror last
667 // after any exceptions can happen during allocations.
668 if (!k.is_null()) {
669 k->set_java_mirror(mirror());
670 }
671 } else {
672 if (fixup_mirror_list() == NULL) {
673 GrowableArray<Klass*>* list =
674 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
675 set_fixup_mirror_list(list);
676 }
677 fixup_mirror_list()->push(k());
678 }
679 }
680
681
682 int java_lang_Class::oop_size(oop java_class) {
683 assert(_oop_size_offset != 0, "must be set");
684 return java_class->int_field(_oop_size_offset);
685 }
686 void java_lang_Class::set_oop_size(oop java_class, int size) {
687 assert(_oop_size_offset != 0, "must be set");
688 java_class->int_field_put(_oop_size_offset, size);
689 }
690 int java_lang_Class::static_oop_field_count(oop java_class) {
691 assert(_static_oop_field_count_offset != 0, "must be set");
692 return java_class->int_field(_static_oop_field_count_offset);
693 }
694 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
695 assert(_static_oop_field_count_offset != 0, "must be set");
696 java_class->int_field_put(_static_oop_field_count_offset, size);
697 }
698
699 oop java_lang_Class::protection_domain(oop java_class) {
700 assert(_protection_domain_offset != 0, "must be set");
701 return java_class->obj_field(_protection_domain_offset);
702 }
703 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
704 assert(_protection_domain_offset != 0, "must be set");
705 java_class->obj_field_put(_protection_domain_offset, pd);
706 }
707
708 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
709 assert(_component_mirror_offset != 0, "must be set");
710 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
711 }
712 oop java_lang_Class::component_mirror(oop java_class) {
713 assert(_component_mirror_offset != 0, "must be set");
714 return java_class->obj_field(_component_mirror_offset);
715 }
716
717 oop java_lang_Class::init_lock(oop java_class) {
718 assert(_init_lock_offset != 0, "must be set");
719 return java_class->obj_field(_init_lock_offset);
720 }
721 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
722 assert(_init_lock_offset != 0, "must be set");
723 java_class->obj_field_put(_init_lock_offset, init_lock);
724 }
725
726 objArrayOop java_lang_Class::signers(oop java_class) {
727 assert(_signers_offset != 0, "must be set");
728 return (objArrayOop)java_class->obj_field(_signers_offset);
729 }
730 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
731 assert(_signers_offset != 0, "must be set");
732 java_class->obj_field_put(_signers_offset, (oop)signers);
733 }
734
735
736 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
737 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
738 if (_class_loader_offset != 0) {
739 java_class->obj_field_put(_class_loader_offset, loader);
740 }
741 }
742
743 oop java_lang_Class::class_loader(oop java_class) {
744 assert(_class_loader_offset != 0, "must be set");
745 return java_class->obj_field(_class_loader_offset);
746 }
747
748 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
749 // This should be improved by adding a field at the Java level or by
750 // introducing a new VM klass (see comment in ClassFileParser)
751 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
752 if (type != T_VOID) {
753 Klass* aklass = Universe::typeArrayKlassObj(type);
754 assert(aklass != NULL, "correct bootstrap");
755 set_array_klass(java_class, aklass);
756 }
757 #ifdef ASSERT
758 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
759 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
760 #endif
761 return java_class;
762 }
763
764
765 Klass* java_lang_Class::as_Klass(oop java_class) {
766 //%note memory_2
767 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
768 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
769 assert(k == NULL || k->is_klass(), "type check");
770 return k;
771 }
772
773
774 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
775 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
776 java_class->metadata_field_put(_klass_offset, klass);
777 }
778
779
780 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
781 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
782 Symbol* name = NULL;
783 bool is_instance = false;
784 if (is_primitive(java_class)) {
785 name = vmSymbols::type_signature(primitive_type(java_class));
786 } else {
787 Klass* k = as_Klass(java_class);
788 is_instance = k->oop_is_instance();
789 name = k->name();
790 }
791 if (name == NULL) {
792 st->print("<null>");
793 return;
794 }
795 if (is_instance) st->print("L");
796 st->write((char*) name->base(), (int) name->utf8_length());
797 if (is_instance) st->print(";");
798 }
799
800 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
801 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
802 Symbol* name;
803 if (is_primitive(java_class)) {
804 name = vmSymbols::type_signature(primitive_type(java_class));
805 // Because this can create a new symbol, the caller has to decrement
806 // the refcount, so make adjustment here and below for symbols returned
807 // that are not created or incremented due to a successful lookup.
808 name->increment_refcount();
809 } else {
810 Klass* k = as_Klass(java_class);
811 if (!k->oop_is_instance()) {
812 name = k->name();
813 name->increment_refcount();
814 } else {
815 ResourceMark rm;
816 const char* sigstr = k->signature_name();
817 int siglen = (int) strlen(sigstr);
818 if (!intern_if_not_found) {
819 name = SymbolTable::probe(sigstr, siglen);
820 } else {
821 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
822 }
823 }
824 }
825 return name;
826 }
827
828 // Returns the Java name for this Java mirror (Resource allocated)
829 // See Klass::external_name().
830 // For primitive type Java mirrors, its type name is returned.
831 const char* java_lang_Class::as_external_name(oop java_class) {
832 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
833 const char* name = NULL;
834 if (is_primitive(java_class)) {
835 name = type2name(primitive_type(java_class));
836 } else {
837 name = as_Klass(java_class)->external_name();
838 }
839 if (name == NULL) {
840 name = "<null>";
841 }
842 return name;
843 }
844
845 Klass* java_lang_Class::array_klass(oop java_class) {
846 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
847 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass");
848 return k;
849 }
850
851
852 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
853 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass");
854 java_class->metadata_field_put(_array_klass_offset, klass);
855 }
856
857
858 bool java_lang_Class::is_primitive(oop java_class) {
859 // should assert:
860 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
861 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
862
863 #ifdef ASSERT
864 if (is_primitive) {
865 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
866 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
867 "Should be either the T_VOID primitive or a java primitive");
868 }
869 #endif
870
871 return is_primitive;
872 }
873
874
875 BasicType java_lang_Class::primitive_type(oop java_class) {
876 assert(java_lang_Class::is_primitive(java_class), "just checking");
877 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
878 BasicType type = T_VOID;
879 if (ak != NULL) {
880 // Note: create_basic_type_mirror above initializes ak to a non-null value.
881 type = ArrayKlass::cast(ak)->element_type();
882 } else {
883 assert(oopDesc::bs()->resolve_and_maybe_copy_oop(java_class) == oopDesc::bs()->resolve_and_maybe_copy_oop(Universe::void_mirror()), "only valid non-array primitive");
884 }
885 assert(oopDesc::bs()->resolve_and_maybe_copy_oop(Universe::java_mirror(type)) == oopDesc::bs()->resolve_and_maybe_copy_oop(java_class), "must be consistent");
886 return type;
887 }
888
889 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
890 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
891 if (is_primitive(java_class)) {
892 if (reference_klass != NULL)
893 (*reference_klass) = NULL;
894 return primitive_type(java_class);
895 } else {
896 if (reference_klass != NULL)
897 (*reference_klass) = as_Klass(java_class);
898 return T_OBJECT;
899 }
900 }
901
902
903 oop java_lang_Class::primitive_mirror(BasicType t) {
904 oop mirror = Universe::java_mirror(t);
905 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
906 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
907 return mirror;
908 }
909
910 bool java_lang_Class::offsets_computed = false;
911 int java_lang_Class::classRedefinedCount_offset = -1;
912
913 void java_lang_Class::compute_offsets() {
914 assert(!offsets_computed, "offsets should be initialized only once");
915 offsets_computed = true;
916
917 Klass* k = SystemDictionary::Class_klass();
918 // The classRedefinedCount field is only present starting in 1.5,
919 // so don't go fatal.
920 compute_optional_offset(classRedefinedCount_offset,
921 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
922
923 // Needs to be optional because the old build runs Queens during bootstrapping
924 // and jdk8-9 doesn't have coordinated pushes yet.
925 compute_optional_offset(_class_loader_offset,
926 k, vmSymbols::classLoader_name(),
927 vmSymbols::classloader_signature());
928
929 compute_offset(_component_mirror_offset,
930 k, vmSymbols::componentType_name(),
931 vmSymbols::class_signature());
932
933 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
934 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
935 // GC treats them the same.
936 _init_lock_offset = _component_mirror_offset;
937
938 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
939 }
940
941 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
942 if (classRedefinedCount_offset == -1) {
943 // If we don't have an offset for it then just return -1 as a marker.
944 return -1;
945 }
946
947 return the_class_mirror->int_field(classRedefinedCount_offset);
948 }
949
950 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
951 if (classRedefinedCount_offset == -1) {
952 // If we don't have an offset for it then nothing to set.
953 return;
954 }
955
956 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
957 }
958
959
960 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
961 // platform thread structure, and a eetop offset which was used for thread
962 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
963 // merged, so in the HotSpot VM we just use the eetop field for the thread
964 // instead of the privateInfo_offset.
965 //
966 // Note: The stackSize field is only present starting in 1.4.
967
968 int java_lang_Thread::_name_offset = 0;
969 int java_lang_Thread::_group_offset = 0;
970 int java_lang_Thread::_contextClassLoader_offset = 0;
971 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
972 int java_lang_Thread::_priority_offset = 0;
973 int java_lang_Thread::_eetop_offset = 0;
974 int java_lang_Thread::_daemon_offset = 0;
975 int java_lang_Thread::_stillborn_offset = 0;
976 int java_lang_Thread::_stackSize_offset = 0;
977 int java_lang_Thread::_tid_offset = 0;
978 int java_lang_Thread::_thread_status_offset = 0;
979 int java_lang_Thread::_park_blocker_offset = 0;
980 int java_lang_Thread::_park_event_offset = 0 ;
981
982
983 void java_lang_Thread::compute_offsets() {
984 assert(_group_offset == 0, "offsets should be initialized only once");
985
986 Klass* k = SystemDictionary::Thread_klass();
987 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
988 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
989 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
990 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
991 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
992 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
993 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
994 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
995 // The stackSize field is only present starting in 1.4, so don't go fatal.
996 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
997 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
998 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
999 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
1000 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
1001 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
1002 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
1003 vmSymbols::long_signature());
1004 }
1005
1006
1007 JavaThread* java_lang_Thread::thread(oop java_thread) {
1008 return (JavaThread*)java_thread->address_field(_eetop_offset);
1009 }
1010
1011
1012 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1013 java_thread->address_field_put(_eetop_offset, (address)thread);
1014 }
1015
1016
1017 oop java_lang_Thread::name(oop java_thread) {
1018 return java_thread->obj_field(_name_offset);
1019 }
1020
1021
1022 void java_lang_Thread::set_name(oop java_thread, oop name) {
1023 java_thread->obj_field_put(_name_offset, name);
1024 }
1025
1026
1027 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1028 return (ThreadPriority)java_thread->int_field(_priority_offset);
1029 }
1030
1031
1032 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1033 java_thread->int_field_put(_priority_offset, priority);
1034 }
1035
1036
1037 oop java_lang_Thread::threadGroup(oop java_thread) {
1038 return java_thread->obj_field(_group_offset);
1039 }
1040
1041
1042 bool java_lang_Thread::is_stillborn(oop java_thread) {
1043 return java_thread->bool_field(_stillborn_offset) != 0;
1044 }
1045
1046
1047 // We never have reason to turn the stillborn bit off
1048 void java_lang_Thread::set_stillborn(oop java_thread) {
1049 java_thread->bool_field_put(_stillborn_offset, true);
1050 }
1051
1052
1053 bool java_lang_Thread::is_alive(oop java_thread) {
1054 JavaThread* thr = java_lang_Thread::thread(java_thread);
1055 return (thr != NULL);
1056 }
1057
1058
1059 bool java_lang_Thread::is_daemon(oop java_thread) {
1060 return java_thread->bool_field(_daemon_offset) != 0;
1061 }
1062
1063
1064 void java_lang_Thread::set_daemon(oop java_thread) {
1065 java_thread->bool_field_put(_daemon_offset, true);
1066 }
1067
1068 oop java_lang_Thread::context_class_loader(oop java_thread) {
1069 return java_thread->obj_field(_contextClassLoader_offset);
1070 }
1071
1072 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1073 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1074 }
1075
1076
1077 jlong java_lang_Thread::stackSize(oop java_thread) {
1078 if (_stackSize_offset > 0) {
1079 return java_thread->long_field(_stackSize_offset);
1080 } else {
1081 return 0;
1082 }
1083 }
1084
1085 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1086 void java_lang_Thread::set_thread_status(oop java_thread,
1087 java_lang_Thread::ThreadStatus status) {
1088 // The threadStatus is only present starting in 1.5
1089 if (_thread_status_offset > 0) {
1090 java_thread->int_field_put(_thread_status_offset, status);
1091 }
1092 }
1093
1094 // Read thread status value from threadStatus field in java.lang.Thread java class.
1095 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1096 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() ||
1097 JavaThread::current()->thread_state() == _thread_in_vm,
1098 "Java Thread is not running in vm");
1099 // The threadStatus is only present starting in 1.5
1100 if (_thread_status_offset > 0) {
1101 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1102 } else {
1103 // All we can easily figure out is if it is alive, but that is
1104 // enough info for a valid unknown status.
1105 // These aren't restricted to valid set ThreadStatus values, so
1106 // use JVMTI values and cast.
1107 JavaThread* thr = java_lang_Thread::thread(java_thread);
1108 if (thr == NULL) {
1109 // the thread hasn't run yet or is in the process of exiting
1110 return NEW;
1111 }
1112 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1113 }
1114 }
1115
1116
1117 jlong java_lang_Thread::thread_id(oop java_thread) {
1118 // The thread ID field is only present starting in 1.5
1119 if (_tid_offset > 0) {
1120 return java_thread->long_field(_tid_offset);
1121 } else {
1122 return 0;
1123 }
1124 }
1125
1126 oop java_lang_Thread::park_blocker(oop java_thread) {
1127 assert(JDK_Version::current().supports_thread_park_blocker() &&
1128 _park_blocker_offset != 0, "Must support parkBlocker field");
1129
1130 if (_park_blocker_offset > 0) {
1131 return java_thread->obj_field(_park_blocker_offset);
1132 }
1133
1134 return NULL;
1135 }
1136
1137 jlong java_lang_Thread::park_event(oop java_thread) {
1138 if (_park_event_offset > 0) {
1139 return java_thread->long_field(_park_event_offset);
1140 }
1141 return 0;
1142 }
1143
1144 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1145 if (_park_event_offset > 0) {
1146 java_thread->long_field_put(_park_event_offset, ptr);
1147 return true;
1148 }
1149 return false;
1150 }
1151
1152
1153 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1154 assert(_thread_status_offset != 0, "Must have thread status");
1155 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1156 switch (status) {
1157 case NEW : return "NEW";
1158 case RUNNABLE : return "RUNNABLE";
1159 case SLEEPING : return "TIMED_WAITING (sleeping)";
1160 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1161 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1162 case PARKED : return "WAITING (parking)";
1163 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1164 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1165 case TERMINATED : return "TERMINATED";
1166 default : return "UNKNOWN";
1167 };
1168 }
1169 int java_lang_ThreadGroup::_parent_offset = 0;
1170 int java_lang_ThreadGroup::_name_offset = 0;
1171 int java_lang_ThreadGroup::_threads_offset = 0;
1172 int java_lang_ThreadGroup::_groups_offset = 0;
1173 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1174 int java_lang_ThreadGroup::_destroyed_offset = 0;
1175 int java_lang_ThreadGroup::_daemon_offset = 0;
1176 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
1177 int java_lang_ThreadGroup::_nthreads_offset = 0;
1178 int java_lang_ThreadGroup::_ngroups_offset = 0;
1179
1180 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1181 assert(java_thread_group->is_oop(), "thread group must be oop");
1182 return java_thread_group->obj_field(_parent_offset);
1183 }
1184
1185 // ("name as oop" accessor is not necessary)
1186
1187 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
1188 oop name = java_thread_group->obj_field(_name_offset);
1189 // ThreadGroup.name can be null
1190 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
1191 }
1192
1193 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1194 assert(java_thread_group->is_oop(), "thread group must be oop");
1195 return java_thread_group->int_field(_nthreads_offset);
1196 }
1197
1198 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1199 oop threads = java_thread_group->obj_field(_threads_offset);
1200 assert(threads != NULL, "threadgroups should have threads");
1201 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1202 return objArrayOop(threads);
1203 }
1204
1205 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1206 assert(java_thread_group->is_oop(), "thread group must be oop");
1207 return java_thread_group->int_field(_ngroups_offset);
1208 }
1209
1210 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1211 oop groups = java_thread_group->obj_field(_groups_offset);
1212 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1213 return objArrayOop(groups);
1214 }
1215
1216 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1217 assert(java_thread_group->is_oop(), "thread group must be oop");
1218 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1219 }
1220
1221 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1222 assert(java_thread_group->is_oop(), "thread group must be oop");
1223 return java_thread_group->bool_field(_destroyed_offset) != 0;
1224 }
1225
1226 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1227 assert(java_thread_group->is_oop(), "thread group must be oop");
1228 return java_thread_group->bool_field(_daemon_offset) != 0;
1229 }
1230
1231 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1232 assert(java_thread_group->is_oop(), "thread group must be oop");
1233 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1234 }
1235
1236 void java_lang_ThreadGroup::compute_offsets() {
1237 assert(_parent_offset == 0, "offsets should be initialized only once");
1238
1239 Klass* k = SystemDictionary::ThreadGroup_klass();
1240
1241 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1242 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1243 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1244 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1245 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1246 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1247 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1248 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1249 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1250 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1251 }
1252
1253 oop java_lang_Throwable::unassigned_stacktrace() {
1254 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass());
1255 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1256 if (UseCompressedOops) {
1257 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1258 } else {
1259 return oopDesc::load_decode_heap_oop((oop*)addr);
1260 }
1261 }
1262
1263 oop java_lang_Throwable::backtrace(oop throwable) {
1264 return throwable->obj_field_acquire(backtrace_offset);
1265 }
1266
1267
1268 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1269 throwable->release_obj_field_put(backtrace_offset, value);
1270 }
1271
1272
1273 oop java_lang_Throwable::message(oop throwable) {
1274 return throwable->obj_field(detailMessage_offset);
1275 }
1276
1277
1278 oop java_lang_Throwable::message(Handle throwable) {
1279 return throwable->obj_field(detailMessage_offset);
1280 }
1281
1282
1283 // Return Symbol for detailed_message or NULL
1284 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1285 PRESERVE_EXCEPTION_MARK; // Keep original exception
1286 oop detailed_message = java_lang_Throwable::message(throwable);
1287 if (detailed_message != NULL) {
1288 return java_lang_String::as_symbol(detailed_message, THREAD);
1289 }
1290 return NULL;
1291 }
1292
1293 void java_lang_Throwable::set_message(oop throwable, oop value) {
1294 throwable->obj_field_put(detailMessage_offset, value);
1295 }
1296
1297
1298 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1299 throwable->obj_field_put(stackTrace_offset, st_element_array);
1300 }
1301
1302 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1303 set_stacktrace(throwable, NULL);
1304 }
1305
1306
1307 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1308 ResourceMark rm;
1309 Klass* k = throwable->klass();
1310 assert(k != NULL, "just checking");
1311 st->print("%s", InstanceKlass::cast(k)->external_name());
1312 oop msg = message(throwable);
1313 if (msg != NULL) {
1314 st->print(": %s", java_lang_String::as_utf8_string(msg));
1315 }
1316 }
1317
1318
1319 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1320 ResourceMark rm;
1321 Klass* k = throwable->klass();
1322 assert(k != NULL, "just checking");
1323 st->print("%s", InstanceKlass::cast(k)->external_name());
1324 oop msg = message(throwable);
1325 if (msg != NULL) {
1326 st->print(": %s", java_lang_String::as_utf8_string(msg));
1327 }
1328 }
1329
1330 // After this many redefines, the stack trace is unreliable.
1331 const int MAX_VERSION = USHRT_MAX;
1332
1333 // Helper backtrace functions to store bci|version together.
1334 static inline int merge_bci_and_version(int bci, int version) {
1335 // only store u2 for version, checking for overflow.
1336 if (version > USHRT_MAX || version < 0) version = MAX_VERSION;
1337 assert((jushort)bci == bci, "bci should be short");
1338 return build_int_from_shorts(version, bci);
1339 }
1340
1341 static inline int bci_at(unsigned int merged) {
1342 return extract_high_short_from_int(merged);
1343 }
1344 static inline int version_at(unsigned int merged) {
1345 return extract_low_short_from_int(merged);
1346 }
1347
1348 static inline bool version_matches(Method* method, int version) {
1349 assert(version < MAX_VERSION, "version is too big");
1350 return method != NULL && (method->constants()->version() == version);
1351 }
1352
1353 static inline int get_line_number(Method* method, int bci) {
1354 int line_number = 0;
1355 if (method->is_native()) {
1356 // Negative value different from -1 below, enabling Java code in
1357 // class java.lang.StackTraceElement to distinguish "native" from
1358 // "no LineNumberTable". JDK tests for -2.
1359 line_number = -2;
1360 } else {
1361 // Returns -1 if no LineNumberTable, and otherwise actual line number
1362 line_number = method->line_number_from_bci(bci);
1363 if (line_number == -1 && ShowHiddenFrames) {
1364 line_number = bci + 1000000;
1365 }
1366 }
1367 return line_number;
1368 }
1369
1370 // This class provides a simple wrapper over the internal structure of
1371 // exception backtrace to insulate users of the backtrace from needing
1372 // to know what it looks like.
1373 class BacktraceBuilder: public StackObj {
1374 private:
1375 Handle _backtrace;
1376 objArrayOop _head;
1377 typeArrayOop _methods;
1378 typeArrayOop _bcis;
1379 objArrayOop _mirrors;
1380 typeArrayOop _cprefs; // needed to insulate method name against redefinition
1381 int _index;
1382 No_Safepoint_Verifier _nsv;
1383
1384 public:
1385
1386 enum {
1387 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1388 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1389 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1390 trace_cprefs_offset = java_lang_Throwable::trace_cprefs_offset,
1391 trace_next_offset = java_lang_Throwable::trace_next_offset,
1392 trace_size = java_lang_Throwable::trace_size,
1393 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1394 };
1395
1396 // get info out of chunks
1397 static typeArrayOop get_methods(objArrayHandle chunk) {
1398 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1399 assert(methods != NULL, "method array should be initialized in backtrace");
1400 return methods;
1401 }
1402 static typeArrayOop get_bcis(objArrayHandle chunk) {
1403 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1404 assert(bcis != NULL, "bci array should be initialized in backtrace");
1405 return bcis;
1406 }
1407 static objArrayOop get_mirrors(objArrayHandle chunk) {
1408 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1409 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1410 return mirrors;
1411 }
1412 static typeArrayOop get_cprefs(objArrayHandle chunk) {
1413 typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset));
1414 assert(cprefs != NULL, "cprefs array should be initialized in backtrace");
1415 return cprefs;
1416 }
1417
1418 // constructor for new backtrace
1419 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) {
1420 expand(CHECK);
1421 _backtrace = _head;
1422 _index = 0;
1423 }
1424
1425 BacktraceBuilder(objArrayHandle backtrace) {
1426 _methods = get_methods(backtrace);
1427 _bcis = get_bcis(backtrace);
1428 _mirrors = get_mirrors(backtrace);
1429 _cprefs = get_cprefs(backtrace);
1430 assert(_methods->length() == _bcis->length() &&
1431 _methods->length() == _mirrors->length(),
1432 "method and source information arrays should match");
1433
1434 // head is the preallocated backtrace
1435 _backtrace = _head = backtrace();
1436 _index = 0;
1437 }
1438
1439 void expand(TRAPS) {
1440 objArrayHandle old_head(THREAD, _head);
1441 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1442
1443 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1444 objArrayHandle new_head(THREAD, head);
1445
1446 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1447 typeArrayHandle new_methods(THREAD, methods);
1448
1449 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1450 typeArrayHandle new_bcis(THREAD, bcis);
1451
1452 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1453 objArrayHandle new_mirrors(THREAD, mirrors);
1454
1455 typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1456 typeArrayHandle new_cprefs(THREAD, cprefs);
1457
1458 if (!old_head.is_null()) {
1459 old_head->obj_at_put(trace_next_offset, new_head());
1460 }
1461 new_head->obj_at_put(trace_methods_offset, new_methods());
1462 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1463 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1464 new_head->obj_at_put(trace_cprefs_offset, new_cprefs());
1465
1466 _head = new_head();
1467 _methods = new_methods();
1468 _bcis = new_bcis();
1469 _mirrors = new_mirrors();
1470 _cprefs = new_cprefs();
1471 _index = 0;
1472 }
1473
1474 oop backtrace() {
1475 return _backtrace();
1476 }
1477
1478 inline void push(Method* method, int bci, TRAPS) {
1479 // Smear the -1 bci to 0 since the array only holds unsigned
1480 // shorts. The later line number lookup would just smear the -1
1481 // to a 0 even if it could be recorded.
1482 if (bci == SynchronizationEntryBCI) bci = 0;
1483
1484 if (_index >= trace_chunk_size) {
1485 methodHandle mhandle(THREAD, method);
1486 expand(CHECK);
1487 method = mhandle();
1488 }
1489
1490 _methods->short_at_put(_index, method->orig_method_idnum());
1491 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version()));
1492 _cprefs->short_at_put(_index, method->name_index());
1493
1494 // We need to save the mirrors in the backtrace to keep the class
1495 // from being unloaded while we still have this stack trace.
1496 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1497 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1498 _index++;
1499 }
1500
1501 };
1502
1503 Symbol* get_source_file_name(InstanceKlass* holder, int version) {
1504 // Find the specific ik version that contains this source_file_name_index
1505 // via the previous versions list, but use the current version's
1506 // constant pool to look it up. The previous version's index has been
1507 // merged for the current constant pool.
1508 InstanceKlass* ik = holder->get_klass_version(version);
1509 // This version has been cleaned up.
1510 if (ik == NULL) return NULL;
1511 int source_file_name_index = ik->source_file_name_index();
1512 return (source_file_name_index == 0) ?
1513 (Symbol*)NULL : holder->constants()->symbol_at(source_file_name_index);
1514 }
1515
1516 // Print stack trace element to resource allocated buffer
1517 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
1518 int method_id, int version, int bci, int cpref) {
1519
1520 // Get strings and string lengths
1521 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1522 const char* klass_name = holder->external_name();
1523 int buf_len = (int)strlen(klass_name);
1524
1525 Method* method = holder->method_with_orig_idnum(method_id, version);
1526
1527 // The method can be NULL if the requested class version is gone
1528 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1529 char* method_name = sym->as_C_string();
1530 buf_len += (int)strlen(method_name);
1531
1532 char* source_file_name = NULL;
1533 Symbol* source = get_source_file_name(holder, version);
1534 if (source != NULL) {
1535 source_file_name = source->as_C_string();
1536 buf_len += (int)strlen(source_file_name);
1537 }
1538
1539 // Allocate temporary buffer with extra space for formatting and line number
1540 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1541
1542 // Print stack trace line in buffer
1543 sprintf(buf, "\tat %s.%s", klass_name, method_name);
1544
1545 if (!version_matches(method, version)) {
1546 strcat(buf, "(Redefined)");
1547 } else {
1548 int line_number = get_line_number(method, bci);
1549 if (line_number == -2) {
1550 strcat(buf, "(Native Method)");
1551 } else {
1552 if (source_file_name != NULL && (line_number != -1)) {
1553 // Sourcename and linenumber
1554 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1555 } else if (source_file_name != NULL) {
1556 // Just sourcename
1557 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1558 } else {
1559 // Neither sourcename nor linenumber
1560 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1561 }
1562 nmethod* nm = method->code();
1563 if (WizardMode && nm != NULL) {
1564 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1565 }
1566 }
1567 }
1568
1569 return buf;
1570 }
1571
1572 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror,
1573 int method_id, int version, int bci, int cpref) {
1574 ResourceMark rm;
1575 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci, cpref);
1576 st->print_cr("%s", buf);
1577 }
1578
1579 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) {
1580 Handle mirror = method->method_holder()->java_mirror();
1581 int method_id = method->orig_method_idnum();
1582 int version = method->constants()->version();
1583 int cpref = method->name_index();
1584 print_stack_element(st, mirror, method_id, version, bci, cpref);
1585 }
1586
1587 const char* java_lang_Throwable::no_stack_trace_message() {
1588 return "\t<<no stack trace available>>";
1589 }
1590
1591
1592 // Currently used only for exceptions occurring during startup
1593 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1594 Thread *THREAD = Thread::current();
1595 Handle h_throwable(THREAD, throwable);
1596 while (h_throwable.not_null()) {
1597 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1598 if (result.is_null()) {
1599 st->print_cr("%s", no_stack_trace_message());
1600 return;
1601 }
1602
1603 while (result.not_null()) {
1604
1605 // Get method id, bci, version and mirror from chunk
1606 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result));
1607 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result));
1608 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result));
1609 typeArrayHandle cprefs (THREAD, BacktraceBuilder::get_cprefs(result));
1610
1611 int length = methods()->length();
1612 for (int index = 0; index < length; index++) {
1613 Handle mirror(THREAD, mirrors->obj_at(index));
1614 // NULL mirror means end of stack trace
1615 if (mirror.is_null()) goto handle_cause;
1616 int method = methods->short_at(index);
1617 int version = version_at(bcis->int_at(index));
1618 int bci = bci_at(bcis->int_at(index));
1619 int cpref = cprefs->short_at(index);
1620 print_stack_element(st, mirror, method, version, bci, cpref);
1621 }
1622 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1623 }
1624 handle_cause:
1625 {
1626 EXCEPTION_MARK;
1627 JavaValue cause(T_OBJECT);
1628 JavaCalls::call_virtual(&cause,
1629 h_throwable,
1630 KlassHandle(THREAD, h_throwable->klass()),
1631 vmSymbols::getCause_name(),
1632 vmSymbols::void_throwable_signature(),
1633 THREAD);
1634 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1635 if (HAS_PENDING_EXCEPTION) {
1636 CLEAR_PENDING_EXCEPTION;
1637 h_throwable = Handle();
1638 } else {
1639 h_throwable = Handle(THREAD, (oop) cause.get_jobject());
1640 if (h_throwable.not_null()) {
1641 st->print("Caused by: ");
1642 print(h_throwable, st);
1643 st->cr();
1644 }
1645 }
1646 }
1647 }
1648 }
1649
1650 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) {
1651 if (!StackTraceInThrowable) return;
1652 ResourceMark rm(THREAD);
1653
1654 // Start out by clearing the backtrace for this object, in case the VM
1655 // runs out of memory while allocating the stack trace
1656 set_backtrace(throwable(), NULL);
1657 // Clear lazily constructed Java level stacktrace if refilling occurs
1658 // This is unnecessary in 1.7+ but harmless
1659 clear_stacktrace(throwable());
1660
1661 int max_depth = MaxJavaStackTraceDepth;
1662 JavaThread* thread = (JavaThread*)THREAD;
1663 BacktraceBuilder bt(CHECK);
1664
1665 // If there is no Java frame just return the method that was being called
1666 // with bci 0
1667 if (!thread->has_last_Java_frame()) {
1668 if (max_depth >= 1 && method() != NULL) {
1669 bt.push(method(), 0, CHECK);
1670 set_backtrace(throwable(), bt.backtrace());
1671 }
1672 return;
1673 }
1674
1675 // Instead of using vframe directly, this version of fill_in_stack_trace
1676 // basically handles everything by hand. This significantly improved the
1677 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1678 // See bug 6333838 for more details.
1679 // The "ASSERT" here is to verify this method generates the exactly same stack
1680 // trace as utilizing vframe.
1681 #ifdef ASSERT
1682 vframeStream st(thread);
1683 methodHandle st_method(THREAD, st.method());
1684 #endif
1685 int total_count = 0;
1686 RegisterMap map(thread, false);
1687 int decode_offset = 0;
1688 nmethod* nm = NULL;
1689 bool skip_fillInStackTrace_check = false;
1690 bool skip_throwableInit_check = false;
1691 bool skip_hidden = !ShowHiddenFrames;
1692
1693 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1694 Method* method = NULL;
1695 int bci = 0;
1696
1697 // Compiled java method case.
1698 if (decode_offset != 0) {
1699 DebugInfoReadStream stream(nm, decode_offset);
1700 decode_offset = stream.read_int();
1701 method = (Method*)nm->metadata_at(stream.read_int());
1702 bci = stream.read_bci();
1703 } else {
1704 if (fr.is_first_frame()) break;
1705 address pc = fr.pc();
1706 if (fr.is_interpreted_frame()) {
1707 address bcp = fr.interpreter_frame_bcp();
1708 method = fr.interpreter_frame_method();
1709 bci = method->bci_from(bcp);
1710 fr = fr.sender(&map);
1711 } else {
1712 CodeBlob* cb = fr.cb();
1713 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1714 // but non nmethod
1715 fr = fr.sender(&map);
1716 if (cb == NULL || !cb->is_nmethod()) {
1717 continue;
1718 }
1719 nm = (nmethod*)cb;
1720 if (nm->method()->is_native()) {
1721 method = nm->method();
1722 bci = 0;
1723 } else {
1724 PcDesc* pd = nm->pc_desc_at(pc);
1725 decode_offset = pd->scope_decode_offset();
1726 // if decode_offset is not equal to 0, it will execute the
1727 // "compiled java method case" at the beginning of the loop.
1728 continue;
1729 }
1730 }
1731 }
1732 #ifdef ASSERT
1733 assert(st_method() == method && st.bci() == bci,
1734 "Wrong stack trace");
1735 st.next();
1736 // vframeStream::method isn't GC-safe so store off a copy
1737 // of the Method* in case we GC.
1738 if (!st.at_end()) {
1739 st_method = st.method();
1740 }
1741 #endif
1742
1743 // the format of the stacktrace will be:
1744 // - 1 or more fillInStackTrace frames for the exception class (skipped)
1745 // - 0 or more <init> methods for the exception class (skipped)
1746 // - rest of the stack
1747
1748 if (!skip_fillInStackTrace_check) {
1749 if (method->name() == vmSymbols::fillInStackTrace_name() &&
1750 throwable->is_a(method->method_holder())) {
1751 continue;
1752 }
1753 else {
1754 skip_fillInStackTrace_check = true; // gone past them all
1755 }
1756 }
1757 if (!skip_throwableInit_check) {
1758 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1759
1760 // skip <init> methods of the exception class and superclasses
1761 // This is simlar to classic VM.
1762 if (method->name() == vmSymbols::object_initializer_name() &&
1763 throwable->is_a(method->method_holder())) {
1764 continue;
1765 } else {
1766 // there are none or we've seen them all - either way stop checking
1767 skip_throwableInit_check = true;
1768 }
1769 }
1770 if (method->is_hidden()) {
1771 if (skip_hidden) continue;
1772 }
1773 bt.push(method, bci, CHECK);
1774 total_count++;
1775 }
1776
1777 // Put completed stack trace into throwable object
1778 set_backtrace(throwable(), bt.backtrace());
1779 }
1780
1781 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) {
1782 // No-op if stack trace is disabled
1783 if (!StackTraceInThrowable) {
1784 return;
1785 }
1786
1787 // Disable stack traces for some preallocated out of memory errors
1788 if (!Universe::should_fill_in_stack_trace(throwable)) {
1789 return;
1790 }
1791
1792 PRESERVE_EXCEPTION_MARK;
1793
1794 JavaThread* thread = JavaThread::active();
1795 fill_in_stack_trace(throwable, method, thread);
1796 // ignore exceptions thrown during stack trace filling
1797 CLEAR_PENDING_EXCEPTION;
1798 }
1799
1800 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1801 // Allocate stack trace - backtrace is created but not filled in
1802
1803 // No-op if stack trace is disabled
1804 if (!StackTraceInThrowable) return;
1805 BacktraceBuilder bt(CHECK); // creates a backtrace
1806 set_backtrace(throwable(), bt.backtrace());
1807 }
1808
1809
1810 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1811 // Fill in stack trace into preallocated backtrace (no GC)
1812
1813 // No-op if stack trace is disabled
1814 if (!StackTraceInThrowable) return;
1815
1816 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1817
1818 JavaThread* THREAD = JavaThread::current();
1819
1820 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
1821 assert(backtrace.not_null(), "backtrace should have been preallocated");
1822
1823 ResourceMark rm(THREAD);
1824 vframeStream st(THREAD);
1825
1826 BacktraceBuilder bt(backtrace);
1827
1828 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1829 // methods as preallocated errors aren't created by "java" code.
1830
1831 // fill in as much stack trace as possible
1832 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace);
1833 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1834 int chunk_count = 0;
1835
1836 for (;!st.at_end(); st.next()) {
1837 bt.push(st.method(), st.bci(), CHECK);
1838 chunk_count++;
1839
1840 // Bail-out for deep stacks
1841 if (chunk_count >= max_chunks) break;
1842 }
1843
1844 // We support the Throwable immutability protocol defined for Java 7.
1845 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
1846 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
1847 }
1848
1849
1850 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1851 if (throwable == NULL) {
1852 THROW_0(vmSymbols::java_lang_NullPointerException());
1853 }
1854 objArrayOop chunk = objArrayOop(backtrace(throwable));
1855 int depth = 0;
1856 if (chunk != NULL) {
1857 // Iterate over chunks and count full ones
1858 while (true) {
1859 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1860 if (next == NULL) break;
1861 depth += trace_chunk_size;
1862 chunk = next;
1863 }
1864 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1865 // Count element in remaining partial chunk. NULL value for mirror
1866 // marks the end of the stack trace elements that are saved.
1867 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1868 assert(mirrors != NULL, "sanity check");
1869 for (int i = 0; i < mirrors->length(); i++) {
1870 if (mirrors->obj_at(i) == NULL) break;
1871 depth++;
1872 }
1873 }
1874 return depth;
1875 }
1876
1877
1878 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1879 if (throwable == NULL) {
1880 THROW_0(vmSymbols::java_lang_NullPointerException());
1881 }
1882 if (index < 0) {
1883 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1884 }
1885 // Compute how many chunks to skip and index into actual chunk
1886 objArrayOop chunk = objArrayOop(backtrace(throwable));
1887 int skip_chunks = index / trace_chunk_size;
1888 int chunk_index = index % trace_chunk_size;
1889 while (chunk != NULL && skip_chunks > 0) {
1890 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1891 skip_chunks--;
1892 }
1893 if (chunk == NULL) {
1894 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1895 }
1896 // Get method id, bci, version, mirror and cpref from chunk
1897 typeArrayOop methods = BacktraceBuilder::get_methods(chunk);
1898 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk);
1899 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1900 typeArrayOop cprefs = BacktraceBuilder::get_cprefs(chunk);
1901
1902 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check");
1903
1904 int method = methods->short_at(chunk_index);
1905 int version = version_at(bcis->int_at(chunk_index));
1906 int bci = bci_at(bcis->int_at(chunk_index));
1907 int cpref = cprefs->short_at(chunk_index);
1908 Handle mirror(THREAD, mirrors->obj_at(chunk_index));
1909
1910 // Chunk can be partial full
1911 if (mirror.is_null()) {
1912 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1913 }
1914 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, cpref, CHECK_0);
1915 return element;
1916 }
1917
1918 oop java_lang_StackTraceElement::create(Handle mirror, int method_id,
1919 int version, int bci, int cpref, TRAPS) {
1920 // Allocate java.lang.StackTraceElement instance
1921 Klass* k = SystemDictionary::StackTraceElement_klass();
1922 assert(k != NULL, "must be loaded in 1.4+");
1923 instanceKlassHandle ik (THREAD, k);
1924 if (ik->should_be_initialized()) {
1925 ik->initialize(CHECK_0);
1926 }
1927
1928 Handle element = ik->allocate_instance_handle(CHECK_0);
1929 // Fill in class name
1930 ResourceMark rm(THREAD);
1931 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1932 const char* str = holder->external_name();
1933 oop classname = StringTable::intern((char*) str, CHECK_0);
1934 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1935
1936 Method* method = holder->method_with_orig_idnum(method_id, version);
1937
1938 // The method can be NULL if the requested class version is gone
1939 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1940
1941 // Fill in method name
1942 oop methodname = StringTable::intern(sym, CHECK_0);
1943 java_lang_StackTraceElement::set_methodName(element(), methodname);
1944
1945 if (!version_matches(method, version)) {
1946 // The method was redefined, accurate line number information isn't available
1947 java_lang_StackTraceElement::set_fileName(element(), NULL);
1948 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1949 } else {
1950 // Fill in source file name and line number.
1951 Symbol* source = get_source_file_name(holder, version);
1952 if (ShowHiddenFrames && source == NULL)
1953 source = vmSymbols::unknown_class_name();
1954 oop filename = StringTable::intern(source, CHECK_0);
1955 java_lang_StackTraceElement::set_fileName(element(), filename);
1956
1957 int line_number = get_line_number(method, bci);
1958 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1959 }
1960 return element();
1961 }
1962
1963 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1964 Handle mirror (THREAD, method->method_holder()->java_mirror());
1965 int method_id = method->orig_method_idnum();
1966 int cpref = method->name_index();
1967 return create(mirror, method_id, method->constants()->version(), bci, cpref, THREAD);
1968 }
1969
1970 void java_lang_reflect_AccessibleObject::compute_offsets() {
1971 Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
1972 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1973 }
1974
1975 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1976 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1977 return (jboolean) reflect->bool_field(override_offset);
1978 }
1979
1980 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1981 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1982 reflect->bool_field_put(override_offset, (int) value);
1983 }
1984
1985 void java_lang_reflect_Method::compute_offsets() {
1986 Klass* k = SystemDictionary::reflect_Method_klass();
1987 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1988 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1989 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1990 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1991 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1992 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1993 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1994 // The generic signature and annotations fields are only present in 1.5
1995 signature_offset = -1;
1996 annotations_offset = -1;
1997 parameter_annotations_offset = -1;
1998 annotation_default_offset = -1;
1999 type_annotations_offset = -1;
2000 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2001 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2002 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2003 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
2004 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2005 }
2006
2007 Handle java_lang_reflect_Method::create(TRAPS) {
2008 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2009 Klass* klass = SystemDictionary::reflect_Method_klass();
2010 // This class is eagerly initialized during VM initialization, since we keep a refence
2011 // to one of the methods
2012 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2013 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2014 }
2015
2016 oop java_lang_reflect_Method::clazz(oop reflect) {
2017 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2018 return reflect->obj_field(clazz_offset);
2019 }
2020
2021 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2022 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2023 reflect->obj_field_put(clazz_offset, value);
2024 }
2025
2026 int java_lang_reflect_Method::slot(oop reflect) {
2027 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2028 return reflect->int_field(slot_offset);
2029 }
2030
2031 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2032 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2033 reflect->int_field_put(slot_offset, value);
2034 }
2035
2036 oop java_lang_reflect_Method::name(oop method) {
2037 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2038 return method->obj_field(name_offset);
2039 }
2040
2041 void java_lang_reflect_Method::set_name(oop method, oop value) {
2042 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2043 method->obj_field_put(name_offset, value);
2044 }
2045
2046 oop java_lang_reflect_Method::return_type(oop method) {
2047 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2048 return method->obj_field(returnType_offset);
2049 }
2050
2051 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2052 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2053 method->obj_field_put(returnType_offset, value);
2054 }
2055
2056 oop java_lang_reflect_Method::parameter_types(oop method) {
2057 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2058 return method->obj_field(parameterTypes_offset);
2059 }
2060
2061 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2062 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2063 method->obj_field_put(parameterTypes_offset, value);
2064 }
2065
2066 oop java_lang_reflect_Method::exception_types(oop method) {
2067 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2068 return method->obj_field(exceptionTypes_offset);
2069 }
2070
2071 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2072 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2073 method->obj_field_put(exceptionTypes_offset, value);
2074 }
2075
2076 int java_lang_reflect_Method::modifiers(oop method) {
2077 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2078 return method->int_field(modifiers_offset);
2079 }
2080
2081 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2082 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2083 method->int_field_put(modifiers_offset, value);
2084 }
2085
2086 bool java_lang_reflect_Method::has_signature_field() {
2087 return (signature_offset >= 0);
2088 }
2089
2090 oop java_lang_reflect_Method::signature(oop method) {
2091 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2092 assert(has_signature_field(), "signature field must be present");
2093 return method->obj_field(signature_offset);
2094 }
2095
2096 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2097 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2098 assert(has_signature_field(), "signature field must be present");
2099 method->obj_field_put(signature_offset, value);
2100 }
2101
2102 bool java_lang_reflect_Method::has_annotations_field() {
2103 return (annotations_offset >= 0);
2104 }
2105
2106 oop java_lang_reflect_Method::annotations(oop method) {
2107 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2108 assert(has_annotations_field(), "annotations field must be present");
2109 return method->obj_field(annotations_offset);
2110 }
2111
2112 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2113 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2114 assert(has_annotations_field(), "annotations field must be present");
2115 method->obj_field_put(annotations_offset, value);
2116 }
2117
2118 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2119 return (parameter_annotations_offset >= 0);
2120 }
2121
2122 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2123 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2124 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2125 return method->obj_field(parameter_annotations_offset);
2126 }
2127
2128 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2129 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2130 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2131 method->obj_field_put(parameter_annotations_offset, value);
2132 }
2133
2134 bool java_lang_reflect_Method::has_annotation_default_field() {
2135 return (annotation_default_offset >= 0);
2136 }
2137
2138 oop java_lang_reflect_Method::annotation_default(oop method) {
2139 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2140 assert(has_annotation_default_field(), "annotation default field must be present");
2141 return method->obj_field(annotation_default_offset);
2142 }
2143
2144 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2145 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2146 assert(has_annotation_default_field(), "annotation default field must be present");
2147 method->obj_field_put(annotation_default_offset, value);
2148 }
2149
2150 bool java_lang_reflect_Method::has_type_annotations_field() {
2151 return (type_annotations_offset >= 0);
2152 }
2153
2154 oop java_lang_reflect_Method::type_annotations(oop method) {
2155 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2156 assert(has_type_annotations_field(), "type_annotations field must be present");
2157 return method->obj_field(type_annotations_offset);
2158 }
2159
2160 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2161 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2162 assert(has_type_annotations_field(), "type_annotations field must be present");
2163 method->obj_field_put(type_annotations_offset, value);
2164 }
2165
2166 void java_lang_reflect_Constructor::compute_offsets() {
2167 Klass* k = SystemDictionary::reflect_Constructor_klass();
2168 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2169 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2170 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2171 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2172 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2173 // The generic signature and annotations fields are only present in 1.5
2174 signature_offset = -1;
2175 annotations_offset = -1;
2176 parameter_annotations_offset = -1;
2177 type_annotations_offset = -1;
2178 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2179 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2180 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2181 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2182 }
2183
2184 Handle java_lang_reflect_Constructor::create(TRAPS) {
2185 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2186 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2187 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2188 instanceKlassHandle klass (THREAD, k);
2189 // Ensure it is initialized
2190 klass->initialize(CHECK_NH);
2191 return klass->allocate_instance_handle(THREAD);
2192 }
2193
2194 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2195 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2196 return reflect->obj_field(clazz_offset);
2197 }
2198
2199 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2200 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2201 reflect->obj_field_put(clazz_offset, value);
2202 }
2203
2204 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2205 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2206 return constructor->obj_field(parameterTypes_offset);
2207 }
2208
2209 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2210 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2211 constructor->obj_field_put(parameterTypes_offset, value);
2212 }
2213
2214 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2215 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2216 return constructor->obj_field(exceptionTypes_offset);
2217 }
2218
2219 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2220 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2221 constructor->obj_field_put(exceptionTypes_offset, value);
2222 }
2223
2224 int java_lang_reflect_Constructor::slot(oop reflect) {
2225 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2226 return reflect->int_field(slot_offset);
2227 }
2228
2229 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2230 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2231 reflect->int_field_put(slot_offset, value);
2232 }
2233
2234 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2235 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2236 return constructor->int_field(modifiers_offset);
2237 }
2238
2239 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2240 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2241 constructor->int_field_put(modifiers_offset, value);
2242 }
2243
2244 bool java_lang_reflect_Constructor::has_signature_field() {
2245 return (signature_offset >= 0);
2246 }
2247
2248 oop java_lang_reflect_Constructor::signature(oop constructor) {
2249 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2250 assert(has_signature_field(), "signature field must be present");
2251 return constructor->obj_field(signature_offset);
2252 }
2253
2254 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2255 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2256 assert(has_signature_field(), "signature field must be present");
2257 constructor->obj_field_put(signature_offset, value);
2258 }
2259
2260 bool java_lang_reflect_Constructor::has_annotations_field() {
2261 return (annotations_offset >= 0);
2262 }
2263
2264 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2265 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2266 assert(has_annotations_field(), "annotations field must be present");
2267 return constructor->obj_field(annotations_offset);
2268 }
2269
2270 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2271 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2272 assert(has_annotations_field(), "annotations field must be present");
2273 constructor->obj_field_put(annotations_offset, value);
2274 }
2275
2276 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2277 return (parameter_annotations_offset >= 0);
2278 }
2279
2280 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2281 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2282 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2283 return method->obj_field(parameter_annotations_offset);
2284 }
2285
2286 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2287 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2288 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2289 method->obj_field_put(parameter_annotations_offset, value);
2290 }
2291
2292 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2293 return (type_annotations_offset >= 0);
2294 }
2295
2296 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2297 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2298 assert(has_type_annotations_field(), "type_annotations field must be present");
2299 return constructor->obj_field(type_annotations_offset);
2300 }
2301
2302 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2303 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2304 assert(has_type_annotations_field(), "type_annotations field must be present");
2305 constructor->obj_field_put(type_annotations_offset, value);
2306 }
2307
2308 void java_lang_reflect_Field::compute_offsets() {
2309 Klass* k = SystemDictionary::reflect_Field_klass();
2310 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2311 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2312 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
2313 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2314 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2315 // The generic signature and annotations fields are only present in 1.5
2316 signature_offset = -1;
2317 annotations_offset = -1;
2318 type_annotations_offset = -1;
2319 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2320 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2321 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2322 }
2323
2324 Handle java_lang_reflect_Field::create(TRAPS) {
2325 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2326 Symbol* name = vmSymbols::java_lang_reflect_Field();
2327 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2328 instanceKlassHandle klass (THREAD, k);
2329 // Ensure it is initialized
2330 klass->initialize(CHECK_NH);
2331 return klass->allocate_instance_handle(THREAD);
2332 }
2333
2334 oop java_lang_reflect_Field::clazz(oop reflect) {
2335 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2336 return reflect->obj_field(clazz_offset);
2337 }
2338
2339 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2340 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2341 reflect->obj_field_put(clazz_offset, value);
2342 }
2343
2344 oop java_lang_reflect_Field::name(oop field) {
2345 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2346 return field->obj_field(name_offset);
2347 }
2348
2349 void java_lang_reflect_Field::set_name(oop field, oop value) {
2350 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2351 field->obj_field_put(name_offset, value);
2352 }
2353
2354 oop java_lang_reflect_Field::type(oop field) {
2355 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2356 return field->obj_field(type_offset);
2357 }
2358
2359 void java_lang_reflect_Field::set_type(oop field, oop value) {
2360 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2361 field->obj_field_put(type_offset, value);
2362 }
2363
2364 int java_lang_reflect_Field::slot(oop reflect) {
2365 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2366 return reflect->int_field(slot_offset);
2367 }
2368
2369 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2370 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2371 reflect->int_field_put(slot_offset, value);
2372 }
2373
2374 int java_lang_reflect_Field::modifiers(oop field) {
2375 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2376 return field->int_field(modifiers_offset);
2377 }
2378
2379 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2380 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2381 field->int_field_put(modifiers_offset, value);
2382 }
2383
2384 bool java_lang_reflect_Field::has_signature_field() {
2385 return (signature_offset >= 0);
2386 }
2387
2388 oop java_lang_reflect_Field::signature(oop field) {
2389 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2390 assert(has_signature_field(), "signature field must be present");
2391 return field->obj_field(signature_offset);
2392 }
2393
2394 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2395 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2396 assert(has_signature_field(), "signature field must be present");
2397 field->obj_field_put(signature_offset, value);
2398 }
2399
2400 bool java_lang_reflect_Field::has_annotations_field() {
2401 return (annotations_offset >= 0);
2402 }
2403
2404 oop java_lang_reflect_Field::annotations(oop field) {
2405 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2406 assert(has_annotations_field(), "annotations field must be present");
2407 return field->obj_field(annotations_offset);
2408 }
2409
2410 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2411 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2412 assert(has_annotations_field(), "annotations field must be present");
2413 field->obj_field_put(annotations_offset, value);
2414 }
2415
2416 bool java_lang_reflect_Field::has_type_annotations_field() {
2417 return (type_annotations_offset >= 0);
2418 }
2419
2420 oop java_lang_reflect_Field::type_annotations(oop field) {
2421 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2422 assert(has_type_annotations_field(), "type_annotations field must be present");
2423 return field->obj_field(type_annotations_offset);
2424 }
2425
2426 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2427 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2428 assert(has_type_annotations_field(), "type_annotations field must be present");
2429 field->obj_field_put(type_annotations_offset, value);
2430 }
2431
2432 void sun_reflect_ConstantPool::compute_offsets() {
2433 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2434 // This null test can be removed post beta
2435 if (k != NULL) {
2436 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2437 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2438 }
2439 }
2440
2441 void java_lang_reflect_Parameter::compute_offsets() {
2442 Klass* k = SystemDictionary::reflect_Parameter_klass();
2443 if(NULL != k) {
2444 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2445 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2446 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature());
2447 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature());
2448 }
2449 }
2450
2451 Handle java_lang_reflect_Parameter::create(TRAPS) {
2452 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2453 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2454 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2455 instanceKlassHandle klass (THREAD, k);
2456 // Ensure it is initialized
2457 klass->initialize(CHECK_NH);
2458 return klass->allocate_instance_handle(THREAD);
2459 }
2460
2461 oop java_lang_reflect_Parameter::name(oop param) {
2462 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2463 return param->obj_field(name_offset);
2464 }
2465
2466 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2467 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2468 param->obj_field_put(name_offset, value);
2469 }
2470
2471 int java_lang_reflect_Parameter::modifiers(oop param) {
2472 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2473 return param->int_field(modifiers_offset);
2474 }
2475
2476 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2477 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2478 param->int_field_put(modifiers_offset, value);
2479 }
2480
2481 int java_lang_reflect_Parameter::index(oop param) {
2482 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2483 return param->int_field(index_offset);
2484 }
2485
2486 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2487 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2488 param->int_field_put(index_offset, value);
2489 }
2490
2491 oop java_lang_reflect_Parameter::executable(oop param) {
2492 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2493 return param->obj_field(executable_offset);
2494 }
2495
2496 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2497 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2498 param->obj_field_put(executable_offset, value);
2499 }
2500
2501
2502 Handle sun_reflect_ConstantPool::create(TRAPS) {
2503 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2504 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2505 instanceKlassHandle klass (THREAD, k);
2506 // Ensure it is initialized
2507 klass->initialize(CHECK_NH);
2508 return klass->allocate_instance_handle(THREAD);
2509 }
2510
2511
2512 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2513 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2514 oop mirror = value->pool_holder()->java_mirror();
2515 // Save the mirror to get back the constant pool.
2516 reflect->obj_field_put(_oop_offset, mirror);
2517 }
2518
2519 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) {
2520 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2521
2522 oop mirror = reflect->obj_field(_oop_offset);
2523 Klass* k = java_lang_Class::as_Klass(mirror);
2524 assert(k->oop_is_instance(), "Must be");
2525
2526 // Get the constant pool back from the klass. Since class redefinition
2527 // merges the new constant pool into the old, this is essentially the
2528 // same constant pool as the original. If constant pool merging is
2529 // no longer done in the future, this will have to change to save
2530 // the original.
2531 return InstanceKlass::cast(k)->constants();
2532 }
2533
2534 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2535 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2536 // This null test can be removed post beta
2537 if (k != NULL) {
2538 compute_offset(_base_offset, k,
2539 vmSymbols::base_name(), vmSymbols::object_signature());
2540 }
2541 }
2542
2543 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2544 Klass* k = SystemDictionary::box_klass(type);
2545 if (k == NULL) return NULL;
2546 instanceKlassHandle h (THREAD, k);
2547 if (!h->is_initialized()) h->initialize(CHECK_0);
2548 return h->allocate_instance(THREAD);
2549 }
2550
2551
2552 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2553 oop box = initialize_and_allocate(type, CHECK_0);
2554 if (box == NULL) return NULL;
2555 switch (type) {
2556 case T_BOOLEAN:
2557 box->bool_field_put(value_offset, value->z);
2558 break;
2559 case T_CHAR:
2560 box->char_field_put(value_offset, value->c);
2561 break;
2562 case T_FLOAT:
2563 box->float_field_put(value_offset, value->f);
2564 break;
2565 case T_DOUBLE:
2566 box->double_field_put(long_value_offset, value->d);
2567 break;
2568 case T_BYTE:
2569 box->byte_field_put(value_offset, value->b);
2570 break;
2571 case T_SHORT:
2572 box->short_field_put(value_offset, value->s);
2573 break;
2574 case T_INT:
2575 box->int_field_put(value_offset, value->i);
2576 break;
2577 case T_LONG:
2578 box->long_field_put(long_value_offset, value->j);
2579 break;
2580 default:
2581 return NULL;
2582 }
2583 return box;
2584 }
2585
2586
2587 BasicType java_lang_boxing_object::basic_type(oop box) {
2588 if (box == NULL) return T_ILLEGAL;
2589 BasicType type = SystemDictionary::box_klass_type(box->klass());
2590 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2591 return T_ILLEGAL;
2592 return type;
2593 }
2594
2595
2596 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2597 BasicType type = SystemDictionary::box_klass_type(box->klass());
2598 switch (type) {
2599 case T_BOOLEAN:
2600 value->z = box->bool_field(value_offset);
2601 break;
2602 case T_CHAR:
2603 value->c = box->char_field(value_offset);
2604 break;
2605 case T_FLOAT:
2606 value->f = box->float_field(value_offset);
2607 break;
2608 case T_DOUBLE:
2609 value->d = box->double_field(long_value_offset);
2610 break;
2611 case T_BYTE:
2612 value->b = box->byte_field(value_offset);
2613 break;
2614 case T_SHORT:
2615 value->s = box->short_field(value_offset);
2616 break;
2617 case T_INT:
2618 value->i = box->int_field(value_offset);
2619 break;
2620 case T_LONG:
2621 value->j = box->long_field(long_value_offset);
2622 break;
2623 default:
2624 return T_ILLEGAL;
2625 } // end switch
2626 return type;
2627 }
2628
2629
2630 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2631 BasicType type = SystemDictionary::box_klass_type(box->klass());
2632 switch (type) {
2633 case T_BOOLEAN:
2634 box->bool_field_put(value_offset, value->z);
2635 break;
2636 case T_CHAR:
2637 box->char_field_put(value_offset, value->c);
2638 break;
2639 case T_FLOAT:
2640 box->float_field_put(value_offset, value->f);
2641 break;
2642 case T_DOUBLE:
2643 box->double_field_put(long_value_offset, value->d);
2644 break;
2645 case T_BYTE:
2646 box->byte_field_put(value_offset, value->b);
2647 break;
2648 case T_SHORT:
2649 box->short_field_put(value_offset, value->s);
2650 break;
2651 case T_INT:
2652 box->int_field_put(value_offset, value->i);
2653 break;
2654 case T_LONG:
2655 box->long_field_put(long_value_offset, value->j);
2656 break;
2657 default:
2658 return T_ILLEGAL;
2659 } // end switch
2660 return type;
2661 }
2662
2663
2664 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2665 switch (type) {
2666 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2667 case T_CHAR: st->print("%d", value->c); break;
2668 case T_BYTE: st->print("%d", value->b); break;
2669 case T_SHORT: st->print("%d", value->s); break;
2670 case T_INT: st->print("%d", value->i); break;
2671 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2672 case T_FLOAT: st->print("%f", value->f); break;
2673 case T_DOUBLE: st->print("%lf", value->d); break;
2674 default: st->print("type %d?", type); break;
2675 }
2676 }
2677
2678
2679 // Support for java_lang_ref_Reference
2680 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() {
2681 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2682 address addr = ik->static_field_addr(static_lock_offset);
2683 return (HeapWord*) addr;
2684 }
2685
2686 oop java_lang_ref_Reference::pending_list_lock() {
2687 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2688 address addr = ik->static_field_addr(static_lock_offset);
2689 if (UseCompressedOops) {
2690 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2691 } else {
2692 return oopDesc::load_decode_heap_oop((oop*)addr);
2693 }
2694 }
2695
2696 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2697 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2698 address addr = ik->static_field_addr(static_pending_offset);
2699 // XXX This might not be HeapWord aligned, almost rather be char *.
2700 return (HeapWord*)addr;
2701 }
2702
2703 oop java_lang_ref_Reference::pending_list() {
2704 char *addr = (char *)pending_list_addr();
2705 if (UseCompressedOops) {
2706 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2707 } else {
2708 return oopDesc::load_decode_heap_oop((oop*)addr);
2709 }
2710 }
2711
2712
2713 // Support for java_lang_ref_SoftReference
2714
2715 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2716 return ref->long_field(timestamp_offset);
2717 }
2718
2719 jlong java_lang_ref_SoftReference::clock() {
2720 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2721 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2722 return *offset;
2723 }
2724
2725 void java_lang_ref_SoftReference::set_clock(jlong value) {
2726 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2727 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2728 *offset = value;
2729 }
2730
2731 // Support for java_lang_invoke_DirectMethodHandle
2732
2733 int java_lang_invoke_DirectMethodHandle::_member_offset;
2734
2735 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
2736 oop member_name = NULL;
2737 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
2738 assert(is_dmh, "a DirectMethodHandle oop is expected");
2739 if (is_dmh) {
2740 member_name = dmh->obj_field(member_offset_in_bytes());
2741 }
2742 return member_name;
2743 }
2744
2745 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
2746 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
2747 if (klass_oop != NULL) {
2748 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2749 }
2750 }
2751
2752 // Support for java_lang_invoke_MethodHandle
2753
2754 int java_lang_invoke_MethodHandle::_type_offset;
2755 int java_lang_invoke_MethodHandle::_form_offset;
2756
2757 int java_lang_invoke_MemberName::_clazz_offset;
2758 int java_lang_invoke_MemberName::_name_offset;
2759 int java_lang_invoke_MemberName::_type_offset;
2760 int java_lang_invoke_MemberName::_flags_offset;
2761 int java_lang_invoke_MemberName::_vmtarget_offset;
2762 int java_lang_invoke_MemberName::_vmloader_offset;
2763 int java_lang_invoke_MemberName::_vmindex_offset;
2764
2765 int java_lang_invoke_LambdaForm::_vmentry_offset;
2766
2767 void java_lang_invoke_MethodHandle::compute_offsets() {
2768 Klass* klass_oop = SystemDictionary::MethodHandle_klass();
2769 if (klass_oop != NULL) {
2770 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
2771 compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
2772 }
2773 }
2774
2775 void java_lang_invoke_MemberName::compute_offsets() {
2776 Klass* klass_oop = SystemDictionary::MemberName_klass();
2777 if (klass_oop != NULL) {
2778 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature());
2779 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature());
2780 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature());
2781 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature());
2782 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2783 }
2784 }
2785
2786 void java_lang_invoke_LambdaForm::compute_offsets() {
2787 Klass* klass_oop = SystemDictionary::LambdaForm_klass();
2788 if (klass_oop != NULL) {
2789 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2790 }
2791 }
2792
2793 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
2794 return obj != NULL && is_subclass(obj->klass());
2795 }
2796
2797
2798 oop java_lang_invoke_MethodHandle::type(oop mh) {
2799 return mh->obj_field(_type_offset);
2800 }
2801
2802 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
2803 mh->obj_field_put(_type_offset, mtype);
2804 }
2805
2806 oop java_lang_invoke_MethodHandle::form(oop mh) {
2807 assert(_form_offset != 0, "");
2808 return mh->obj_field(_form_offset);
2809 }
2810
2811 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
2812 assert(_form_offset != 0, "");
2813 mh->obj_field_put(_form_offset, lform);
2814 }
2815
2816 /// MemberName accessors
2817
2818 oop java_lang_invoke_MemberName::clazz(oop mname) {
2819 assert(is_instance(mname), "wrong type");
2820 return mname->obj_field(_clazz_offset);
2821 }
2822
2823 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
2824 assert(is_instance(mname), "wrong type");
2825 mname->obj_field_put(_clazz_offset, clazz);
2826 }
2827
2828 oop java_lang_invoke_MemberName::name(oop mname) {
2829 assert(is_instance(mname), "wrong type");
2830 return mname->obj_field(_name_offset);
2831 }
2832
2833 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
2834 assert(is_instance(mname), "wrong type");
2835 mname->obj_field_put(_name_offset, name);
2836 }
2837
2838 oop java_lang_invoke_MemberName::type(oop mname) {
2839 assert(is_instance(mname), "wrong type");
2840 return mname->obj_field(_type_offset);
2841 }
2842
2843 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
2844 assert(is_instance(mname), "wrong type");
2845 mname->obj_field_put(_type_offset, type);
2846 }
2847
2848 int java_lang_invoke_MemberName::flags(oop mname) {
2849 assert(is_instance(mname), "wrong type");
2850 return mname->int_field(_flags_offset);
2851 }
2852
2853 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
2854 assert(is_instance(mname), "wrong type");
2855 mname->int_field_put(_flags_offset, flags);
2856 }
2857
2858 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
2859 assert(is_instance(mname), "wrong type");
2860 return (Metadata*)mname->address_field(_vmtarget_offset);
2861 }
2862
2863 bool java_lang_invoke_MemberName::is_method(oop mname) {
2864 assert(is_instance(mname), "must be MemberName");
2865 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
2866 }
2867
2868 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
2869 assert(is_instance(mname), "wrong type");
2870 // check the type of the vmtarget
2871 oop dependency = NULL;
2872 if (ref != NULL) {
2873 switch (flags(mname) & (MN_IS_METHOD |
2874 MN_IS_CONSTRUCTOR |
2875 MN_IS_FIELD)) {
2876 case MN_IS_METHOD:
2877 case MN_IS_CONSTRUCTOR:
2878 assert(ref->is_method(), "should be a method");
2879 dependency = ((Method*)ref)->method_holder()->java_mirror();
2880 break;
2881 case MN_IS_FIELD:
2882 assert(ref->is_klass(), "should be a class");
2883 dependency = ((Klass*)ref)->java_mirror();
2884 break;
2885 default:
2886 ShouldNotReachHere();
2887 }
2888 }
2889 mname->address_field_put(_vmtarget_offset, (address)ref);
2890 // Add a reference to the loader (actually mirror because anonymous classes will not have
2891 // distinct loaders) to ensure the metadata is kept alive
2892 // This mirror may be different than the one in clazz field.
2893 mname->obj_field_put(_vmloader_offset, dependency);
2894 }
2895
2896 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
2897 assert(is_instance(mname), "wrong type");
2898 return (intptr_t) mname->address_field(_vmindex_offset);
2899 }
2900
2901 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
2902 assert(is_instance(mname), "wrong type");
2903 mname->address_field_put(_vmindex_offset, (address) index);
2904 }
2905
2906 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
2907 assert(is_instance(lform), "wrong type");
2908 return lform->obj_field(_vmentry_offset);
2909 }
2910
2911
2912 // Support for java_lang_invoke_MethodType
2913
2914 int java_lang_invoke_MethodType::_rtype_offset;
2915 int java_lang_invoke_MethodType::_ptypes_offset;
2916
2917 void java_lang_invoke_MethodType::compute_offsets() {
2918 Klass* k = SystemDictionary::MethodType_klass();
2919 if (k != NULL) {
2920 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2921 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2922 }
2923 }
2924
2925 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
2926 st->print("(");
2927 objArrayOop pts = ptypes(mt);
2928 for (int i = 0, limit = pts->length(); i < limit; i++) {
2929 java_lang_Class::print_signature(pts->obj_at(i), st);
2930 }
2931 st->print(")");
2932 java_lang_Class::print_signature(rtype(mt), st);
2933 }
2934
2935 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2936 ResourceMark rm;
2937 stringStream buffer(128);
2938 print_signature(mt, &buffer);
2939 const char* sigstr = buffer.base();
2940 int siglen = (int) buffer.size();
2941 Symbol *name;
2942 if (!intern_if_not_found) {
2943 name = SymbolTable::probe(sigstr, siglen);
2944 } else {
2945 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2946 }
2947 return name;
2948 }
2949
2950 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
2951 if (mt1 == mt2)
2952 return true;
2953 if (rtype(mt1) != rtype(mt2))
2954 return false;
2955 if (ptype_count(mt1) != ptype_count(mt2))
2956 return false;
2957 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
2958 if (ptype(mt1, i) != ptype(mt2, i))
2959 return false;
2960 }
2961 return true;
2962 }
2963
2964 oop java_lang_invoke_MethodType::rtype(oop mt) {
2965 assert(is_instance(mt), "must be a MethodType");
2966 return mt->obj_field(_rtype_offset);
2967 }
2968
2969 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
2970 assert(is_instance(mt), "must be a MethodType");
2971 return (objArrayOop) mt->obj_field(_ptypes_offset);
2972 }
2973
2974 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
2975 return ptypes(mt)->obj_at(idx);
2976 }
2977
2978 int java_lang_invoke_MethodType::ptype_count(oop mt) {
2979 return ptypes(mt)->length();
2980 }
2981
2982 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
2983 objArrayOop pts = ptypes(mt);
2984 int count = pts->length();
2985 int slots = 0;
2986 for (int i = 0; i < count; i++) {
2987 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
2988 slots += type2size[bt];
2989 }
2990 return slots;
2991 }
2992
2993 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
2994 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
2995 return type2size[bt];
2996 }
2997
2998
2999 // Support for java_lang_invoke_CallSite
3000
3001 int java_lang_invoke_CallSite::_target_offset;
3002 int java_lang_invoke_CallSite::_context_offset;
3003
3004 void java_lang_invoke_CallSite::compute_offsets() {
3005 Klass* k = SystemDictionary::CallSite_klass();
3006 if (k != NULL) {
3007 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
3008 compute_offset(_context_offset, k, vmSymbols::context_name(),
3009 vmSymbols::java_lang_invoke_MethodHandleNatives_CallSiteContext_signature());
3010 }
3011 }
3012
3013 oop java_lang_invoke_CallSite::context(oop call_site) {
3014 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3015
3016 oop dep_oop = call_site->obj_field(_context_offset);
3017 return dep_oop;
3018 }
3019
3020 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3021
3022 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3023
3024 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3025 Klass* k = SystemDictionary::Context_klass();
3026 if (k != NULL) {
3027 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3028 }
3029 }
3030
3031 nmethodBucket* java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3032 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3033 return (nmethodBucket*) (address) call_site->long_field(_vmdependencies_offset);
3034 }
3035
3036 void java_lang_invoke_MethodHandleNatives_CallSiteContext::set_vmdependencies(oop call_site, nmethodBucket* context) {
3037 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3038 call_site->long_field_put(_vmdependencies_offset, (jlong) (address) context);
3039 }
3040
3041 // Support for java_security_AccessControlContext
3042
3043 int java_security_AccessControlContext::_context_offset = 0;
3044 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3045 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3046 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3047
3048 void java_security_AccessControlContext::compute_offsets() {
3049 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3050 fieldDescriptor fd;
3051 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass());
3052
3053 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
3054 fatal("Invalid layout of java.security.AccessControlContext");
3055 }
3056 _context_offset = fd.offset();
3057
3058 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
3059 fatal("Invalid layout of java.security.AccessControlContext");
3060 }
3061 _privilegedContext_offset = fd.offset();
3062
3063 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
3064 fatal("Invalid layout of java.security.AccessControlContext");
3065 }
3066 _isPrivileged_offset = fd.offset();
3067
3068 // The offset may not be present for bootstrapping with older JDK.
3069 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
3070 _isAuthorized_offset = fd.offset();
3071 }
3072 }
3073
3074
3075 bool java_security_AccessControlContext::is_authorized(Handle context) {
3076 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
3077 assert(_isAuthorized_offset != -1, "should be set");
3078 return context->bool_field(_isAuthorized_offset) != 0;
3079 }
3080
3081 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3082 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3083 // Ensure klass is initialized
3084 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
3085 // Allocate result
3086 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
3087 // Fill in values
3088 result->obj_field_put(_context_offset, context());
3089 result->obj_field_put(_privilegedContext_offset, privileged_context());
3090 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3091 // whitelist AccessControlContexts created by the JVM if present
3092 if (_isAuthorized_offset != -1) {
3093 result->bool_field_put(_isAuthorized_offset, true);
3094 }
3095 return result;
3096 }
3097
3098
3099 // Support for java_lang_ClassLoader
3100
3101 bool java_lang_ClassLoader::offsets_computed = false;
3102 int java_lang_ClassLoader::_loader_data_offset = -1;
3103 int java_lang_ClassLoader::parallelCapable_offset = -1;
3104
3105 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
3106 assert(loader != NULL && loader->is_oop(), "loader must be oop");
3107 loader = oopDesc::bs()->resolve_and_maybe_copy_oop(loader);
3108 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
3109 }
3110
3111 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
3112 return *java_lang_ClassLoader::loader_data_addr(loader);
3113 }
3114
3115 void java_lang_ClassLoader::compute_offsets() {
3116 assert(!offsets_computed, "offsets should be initialized only once");
3117 offsets_computed = true;
3118
3119 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
3120 Klass* k1 = SystemDictionary::ClassLoader_klass();
3121 compute_optional_offset(parallelCapable_offset,
3122 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
3123
3124 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3125 }
3126
3127 oop java_lang_ClassLoader::parent(oop loader) {
3128 if (ShenandoahVerifyReadsToFromSpace) {
3129 loader = oopDesc::bs()->resolve_oop(loader);
3130 }
3131 assert(is_instance(loader), "loader must be oop");
3132 return loader->obj_field(parent_offset);
3133 }
3134
3135 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3136 assert(is_instance(loader), "loader must be oop");
3137 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3138 oop acl = loader;
3139 debug_only(jint loop_count = 0);
3140 // This loop taken verbatim from ClassLoader.java:
3141 do {
3142 acl = parent(acl);
3143 if (cl == acl) {
3144 return true;
3145 }
3146 assert(++loop_count > 0, "loop_count overflow");
3147 } while (acl != NULL);
3148 return false;
3149 }
3150
3151 bool java_lang_ClassLoader::is_instance(oop obj) {
3152 return obj != NULL && is_subclass(obj->klass());
3153 }
3154
3155
3156 // For class loader classes, parallelCapable defined
3157 // based on non-null field
3158 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3159 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3160 if (parallelCapable_offset == -1) {
3161 // Default for backward compatibility is false
3162 return false;
3163 }
3164 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3165 }
3166
3167 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3168 // Fix for 4474172; see evaluation for more details
3169 loader = non_reflection_class_loader(loader);
3170
3171 oop cl = SystemDictionary::java_system_loader();
3172 while(cl != NULL) {
3173 if (cl == loader) return true;
3174 cl = parent(cl);
3175 }
3176 return false;
3177 }
3178
3179 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3180 if (loader != NULL) {
3181 // See whether this is one of the class loaders associated with
3182 // the generated bytecodes for reflection, and if so, "magically"
3183 // delegate to its parent to prevent class loading from occurring
3184 // in places where applications using reflection didn't expect it.
3185 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3186 // This might be null in non-1.4 JDKs
3187 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
3188 return parent(loader);
3189 }
3190 }
3191 return loader;
3192 }
3193
3194
3195 // Support for java_lang_System
3196 int java_lang_System::in_offset_in_bytes() {
3197 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3198 }
3199
3200
3201 int java_lang_System::out_offset_in_bytes() {
3202 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3203 }
3204
3205
3206 int java_lang_System::err_offset_in_bytes() {
3207 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3208 }
3209
3210
3211 bool java_lang_System::has_security_manager() {
3212 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass());
3213 address addr = ik->static_field_addr(static_security_offset);
3214 if (UseCompressedOops) {
3215 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3216 } else {
3217 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3218 }
3219 }
3220
3221 int java_lang_Class::_klass_offset;
3222 int java_lang_Class::_array_klass_offset;
3223 int java_lang_Class::_oop_size_offset;
3224 int java_lang_Class::_static_oop_field_count_offset;
3225 int java_lang_Class::_class_loader_offset;
3226 int java_lang_Class::_protection_domain_offset;
3227 int java_lang_Class::_component_mirror_offset;
3228 int java_lang_Class::_init_lock_offset;
3229 int java_lang_Class::_signers_offset;
3230 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3231 int java_lang_Throwable::backtrace_offset;
3232 int java_lang_Throwable::detailMessage_offset;
3233 int java_lang_Throwable::cause_offset;
3234 int java_lang_Throwable::stackTrace_offset;
3235 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3236 int java_lang_reflect_AccessibleObject::override_offset;
3237 int java_lang_reflect_Method::clazz_offset;
3238 int java_lang_reflect_Method::name_offset;
3239 int java_lang_reflect_Method::returnType_offset;
3240 int java_lang_reflect_Method::parameterTypes_offset;
3241 int java_lang_reflect_Method::exceptionTypes_offset;
3242 int java_lang_reflect_Method::slot_offset;
3243 int java_lang_reflect_Method::modifiers_offset;
3244 int java_lang_reflect_Method::signature_offset;
3245 int java_lang_reflect_Method::annotations_offset;
3246 int java_lang_reflect_Method::parameter_annotations_offset;
3247 int java_lang_reflect_Method::annotation_default_offset;
3248 int java_lang_reflect_Method::type_annotations_offset;
3249 int java_lang_reflect_Constructor::clazz_offset;
3250 int java_lang_reflect_Constructor::parameterTypes_offset;
3251 int java_lang_reflect_Constructor::exceptionTypes_offset;
3252 int java_lang_reflect_Constructor::slot_offset;
3253 int java_lang_reflect_Constructor::modifiers_offset;
3254 int java_lang_reflect_Constructor::signature_offset;
3255 int java_lang_reflect_Constructor::annotations_offset;
3256 int java_lang_reflect_Constructor::parameter_annotations_offset;
3257 int java_lang_reflect_Constructor::type_annotations_offset;
3258 int java_lang_reflect_Field::clazz_offset;
3259 int java_lang_reflect_Field::name_offset;
3260 int java_lang_reflect_Field::type_offset;
3261 int java_lang_reflect_Field::slot_offset;
3262 int java_lang_reflect_Field::modifiers_offset;
3263 int java_lang_reflect_Field::signature_offset;
3264 int java_lang_reflect_Field::annotations_offset;
3265 int java_lang_reflect_Field::type_annotations_offset;
3266 int java_lang_reflect_Parameter::name_offset;
3267 int java_lang_reflect_Parameter::modifiers_offset;
3268 int java_lang_reflect_Parameter::index_offset;
3269 int java_lang_reflect_Parameter::executable_offset;
3270 int java_lang_boxing_object::value_offset;
3271 int java_lang_boxing_object::long_value_offset;
3272 int java_lang_ref_Reference::referent_offset;
3273 int java_lang_ref_Reference::queue_offset;
3274 int java_lang_ref_Reference::next_offset;
3275 int java_lang_ref_Reference::discovered_offset;
3276 int java_lang_ref_Reference::static_lock_offset;
3277 int java_lang_ref_Reference::static_pending_offset;
3278 int java_lang_ref_Reference::number_of_fake_oop_fields;
3279 int java_lang_ref_SoftReference::timestamp_offset;
3280 int java_lang_ref_SoftReference::static_clock_offset;
3281 int java_lang_ClassLoader::parent_offset;
3282 int java_lang_System::static_in_offset;
3283 int java_lang_System::static_out_offset;
3284 int java_lang_System::static_err_offset;
3285 int java_lang_System::static_security_offset;
3286 int java_lang_StackTraceElement::declaringClass_offset;
3287 int java_lang_StackTraceElement::methodName_offset;
3288 int java_lang_StackTraceElement::fileName_offset;
3289 int java_lang_StackTraceElement::lineNumber_offset;
3290 int java_lang_AssertionStatusDirectives::classes_offset;
3291 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3292 int java_lang_AssertionStatusDirectives::packages_offset;
3293 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3294 int java_lang_AssertionStatusDirectives::deflt_offset;
3295 int java_nio_Buffer::_limit_offset;
3296 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3297 int sun_reflect_ConstantPool::_oop_offset;
3298 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3299
3300
3301 // Support for java_lang_StackTraceElement
3302
3303 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3304 element->obj_field_put(fileName_offset, value);
3305 }
3306
3307 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3308 element->obj_field_put(declaringClass_offset, value);
3309 }
3310
3311 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3312 element->obj_field_put(methodName_offset, value);
3313 }
3314
3315 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3316 element->int_field_put(lineNumber_offset, value);
3317 }
3318
3319
3320 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3321
3322 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3323 o->obj_field_put(classes_offset, val);
3324 }
3325
3326 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3327 o->obj_field_put(classEnabled_offset, val);
3328 }
3329
3330 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3331 o->obj_field_put(packages_offset, val);
3332 }
3333
3334 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3335 o->obj_field_put(packageEnabled_offset, val);
3336 }
3337
3338 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3339 o->bool_field_put(deflt_offset, val);
3340 }
3341
3342
3343 // Support for intrinsification of java.nio.Buffer.checkIndex
3344 int java_nio_Buffer::limit_offset() {
3345 return _limit_offset;
3346 }
3347
3348
3349 void java_nio_Buffer::compute_offsets() {
3350 Klass* k = SystemDictionary::nio_Buffer_klass();
3351 assert(k != NULL, "must be loaded in 1.4+");
3352 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3353 }
3354
3355 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3356 if (_owner_offset != 0) return;
3357
3358 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3359 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3360 compute_offset(_owner_offset, k,
3361 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3362 }
3363
3364 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3365 assert(_owner_offset != 0, "Must be initialized");
3366 return obj->obj_field(_owner_offset);
3367 }
3368
3369 // Compute hard-coded offsets
3370 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3371 // are not available to determine the offset_of_static_fields.
3372 void JavaClasses::compute_hard_coded_offsets() {
3373 const int x = heapOopSize;
3374 const int header = instanceOopDesc::base_offset_in_bytes();
3375
3376 // Throwable Class
3377 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
3378 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3379 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
3380 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3381 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x;
3382
3383 // java_lang_boxing_object
3384 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3385 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3386
3387 // java_lang_ref_Reference:
3388 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3389 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3390 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
3391 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
3392 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
3393 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3394 // Artificial fields for java_lang_ref_Reference
3395 // The first field is for the discovered field added in 1.4
3396 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3397
3398 // java_lang_ref_SoftReference Class
3399 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3400 // Don't multiply static fields because they are always in wordSize units
3401 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3402
3403 // java_lang_ClassLoader
3404 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3405
3406 // java_lang_System
3407 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
3408 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3409 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3410 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3411
3412 // java_lang_StackTraceElement
3413 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
3414 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3415 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
3416 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3417 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3418 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3419 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3420 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3421 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3422
3423 }
3424
3425
3426 // Compute non-hard-coded field offsets of all the classes in this file
3427 void JavaClasses::compute_offsets() {
3428 // java_lang_Class::compute_offsets was called earlier in bootstrap
3429 java_lang_ClassLoader::compute_offsets();
3430 java_lang_Thread::compute_offsets();
3431 java_lang_ThreadGroup::compute_offsets();
3432 java_lang_invoke_MethodHandle::compute_offsets();
3433 java_lang_invoke_DirectMethodHandle::compute_offsets();
3434 java_lang_invoke_MemberName::compute_offsets();
3435 java_lang_invoke_LambdaForm::compute_offsets();
3436 java_lang_invoke_MethodType::compute_offsets();
3437 java_lang_invoke_CallSite::compute_offsets();
3438 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets();
3439 java_security_AccessControlContext::compute_offsets();
3440 // Initialize reflection classes. The layouts of these classes
3441 // changed with the new reflection implementation in JDK 1.4, and
3442 // since the Universe doesn't know what JDK version it is until this
3443 // point we defer computation of these offsets until now.
3444 java_lang_reflect_AccessibleObject::compute_offsets();
3445 java_lang_reflect_Method::compute_offsets();
3446 java_lang_reflect_Constructor::compute_offsets();
3447 java_lang_reflect_Field::compute_offsets();
3448 java_nio_Buffer::compute_offsets();
3449 sun_reflect_ConstantPool::compute_offsets();
3450 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3451 java_lang_reflect_Parameter::compute_offsets();
3452
3453 // generated interpreter code wants to know about the offsets we just computed:
3454 AbstractAssembler::update_delayed_values();
3455 }
3456
3457 #ifndef PRODUCT
3458
3459 // These functions exist to assert the validity of hard-coded field offsets to guard
3460 // against changes in the class files
3461
3462 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3463 EXCEPTION_MARK;
3464 fieldDescriptor fd;
3465 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3466 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3467 instanceKlassHandle h_klass (THREAD, k);
3468 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3469 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3470 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3471 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3472 return false;
3473 }
3474 if (fd.is_static()) {
3475 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3476 return false;
3477 }
3478 if (fd.offset() == hardcoded_offset ) {
3479 return true;
3480 } else {
3481 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3482 klass_name, field_name, hardcoded_offset, fd.offset());
3483 return false;
3484 }
3485 }
3486
3487
3488 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3489 EXCEPTION_MARK;
3490 fieldDescriptor fd;
3491 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3492 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3493 instanceKlassHandle h_klass (THREAD, k);
3494 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3495 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3496 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3497 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3498 return false;
3499 }
3500 if (!fd.is_static()) {
3501 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3502 return false;
3503 }
3504 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3505 return true;
3506 } else {
3507 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());
3508 return false;
3509 }
3510 }
3511
3512
3513 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3514 EXCEPTION_MARK;
3515 fieldDescriptor fd;
3516 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3517 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3518 instanceKlassHandle h_klass (THREAD, k);
3519 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3520 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3521 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3522 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3523 return false;
3524 }
3525 if (!fd.is_static() || !fd.has_initial_value()) {
3526 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3527 return false;
3528 }
3529 if (!fd.initial_value_tag().is_int()) {
3530 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3531 return false;
3532 }
3533 jint field_value = fd.int_initial_value();
3534 if (field_value == hardcoded_constant) {
3535 return true;
3536 } else {
3537 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);
3538 return false;
3539 }
3540 }
3541
3542
3543 // Check the hard-coded field offsets of all the classes in this file
3544
3545 void JavaClasses::check_offsets() {
3546 bool valid = true;
3547 HandleMark hm;
3548
3549 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3550 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3551
3552 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3553 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3554
3555 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3556 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3557
3558 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3559 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3560
3561 // java.lang.String
3562
3563 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3564 if (java_lang_String::has_offset_field()) {
3565 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3566 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3567 }
3568 if (java_lang_String::has_hash_field()) {
3569 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3570 }
3571
3572 // java.lang.Class
3573
3574 // Fake fields
3575 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3576 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3577
3578 // java.lang.Throwable
3579
3580 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3581 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3582 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3583 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3584
3585 // Boxed primitive objects (java_lang_boxing_object)
3586
3587 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3588 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3589 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3590 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3591 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3592 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3593 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3594 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3595
3596 // java.lang.ClassLoader
3597
3598 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3599
3600 // java.lang.System
3601
3602 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3603 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3604 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3605 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
3606
3607 // java.lang.StackTraceElement
3608
3609 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3610 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3611 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3612 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3613
3614 // java.lang.ref.Reference
3615
3616 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3617 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3618 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3619 // Fake field
3620 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3621 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3622 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3623
3624 // java.lang.ref.SoftReference
3625
3626 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3627 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3628
3629 // java.lang.AssertionStatusDirectives
3630 //
3631 // The CheckAssertionStatusDirectives boolean can be removed from here and
3632 // globals.hpp after the AssertionStatusDirectives class has been integrated
3633 // into merlin "for some time." Without it, the vm will fail with early
3634 // merlin builds.
3635
3636 if (CheckAssertionStatusDirectives) {
3637 const char* nm = "java/lang/AssertionStatusDirectives";
3638 const char* sig = "[Ljava/lang/String;";
3639 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3640 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3641 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3642 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3643 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3644 }
3645
3646 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3647 }
3648
3649 #endif // PRODUCT
3650
3651 int InjectedField::compute_offset() {
3652 Klass* klass_oop = klass();
3653 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3654 if (!may_be_java && !fs.access_flags().is_internal()) {
3655 // Only look at injected fields
3656 continue;
3657 }
3658 if (fs.name() == name() && fs.signature() == signature()) {
3659 return fs.offset();
3660 }
3661 }
3662 ResourceMark rm;
3663 tty->print_cr("Invalid layout of %s at %s/%s%s", InstanceKlass::cast(klass_oop)->external_name(), name()->as_C_string(), signature()->as_C_string(), may_be_java ? " (may_be_java)" : "");
3664 #ifndef PRODUCT
3665 klass_oop->print();
3666 tty->print_cr("all fields:");
3667 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3668 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
3669 }
3670 #endif //PRODUCT
3671 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class");
3672 return -1;
3673 }
3674
3675 void javaClasses_init() {
3676 JavaClasses::compute_offsets();
3677 JavaClasses::check_offsets();
3678 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3679 }