1 /*
2 * Copyright (c) 1997, 2017, 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/classLoaderData.inline.hpp"
28 #include "classfile/javaClasses.inline.hpp"
29 #include "classfile/moduleEntry.hpp"
30 #include "classfile/stringTable.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "code/debugInfo.hpp"
33 #include "code/dependencyContext.hpp"
34 #include "code/pcDesc.hpp"
35 #include "interpreter/interpreter.hpp"
36 #include "memory/oopFactory.hpp"
37 #include "memory/resourceArea.hpp"
38 #include "memory/universe.inline.hpp"
39 #include "oops/fieldStreams.hpp"
40 #include "oops/instanceKlass.hpp"
41 #include "oops/instanceMirrorKlass.hpp"
42 #include "oops/klass.hpp"
43 #include "oops/method.hpp"
44 #include "oops/objArrayOop.inline.hpp"
45 #include "oops/oop.inline.hpp"
46 #include "oops/symbol.hpp"
47 #include "oops/typeArrayOop.hpp"
48 #include "prims/resolvedMethodTable.hpp"
49 #include "runtime/fieldDescriptor.hpp"
50 #include "runtime/handles.inline.hpp"
51 #include "runtime/interfaceSupport.hpp"
52 #include "runtime/java.hpp"
53 #include "runtime/javaCalls.hpp"
54 #include "runtime/safepoint.hpp"
55 #include "runtime/thread.inline.hpp"
56 #include "runtime/vframe.hpp"
57 #include "utilities/align.hpp"
58 #include "utilities/preserveException.hpp"
59
60 #if INCLUDE_JVMCI
61 #include "jvmci/jvmciJavaClasses.hpp"
62 #endif
63
64 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
65 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
66
67 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
68 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
69
70 InjectedField JavaClasses::_injected_fields[] = {
71 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
72 };
73
74 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
75 return _injected_fields[id].compute_offset();
76 }
77
78
79 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
80 *field_count = 0;
81
82 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
83 if (sid == vmSymbols::NO_SID) {
84 // Only well known classes can inject fields
85 return NULL;
86 }
87
88 int count = 0;
89 int start = -1;
90
91 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
92 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
93 count++; \
94 if (start == -1) start = klass##_##name##_enum; \
95 }
96 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
97 #undef LOOKUP_INJECTED_FIELD
98
99 if (start != -1) {
100 *field_count = count;
101 return _injected_fields + start;
102 }
103 return NULL;
104 }
105
106
107 static bool find_field(InstanceKlass* ik,
108 Symbol* name_symbol, Symbol* signature_symbol,
109 fieldDescriptor* fd,
110 bool is_static = false, bool allow_super = false) {
111 if (allow_super || is_static) {
112 return ik->find_field(name_symbol, signature_symbol, is_static, fd) != NULL;
113 } else {
114 return ik->find_local_field(name_symbol, signature_symbol, fd);
115 }
116 }
117
118 // Helpful routine for computing field offsets at run time rather than hardcoding them
119 static void
120 compute_offset(int &dest_offset,
121 Klass* klass, Symbol* name_symbol, Symbol* signature_symbol,
122 bool is_static = false, bool allow_super = false) {
123 fieldDescriptor fd;
124 InstanceKlass* ik = InstanceKlass::cast(klass);
125 if (!find_field(ik, name_symbol, signature_symbol, &fd, is_static, allow_super)) {
126 ResourceMark rm;
127 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
128 #ifndef PRODUCT
129 ik->print();
130 tty->print_cr("all fields:");
131 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
132 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
133 }
134 #endif //PRODUCT
135 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
136 }
137 dest_offset = fd.offset();
138 }
139
140 // Same as above but for "optional" offsets that might not be present in certain JDK versions
141 static void
142 compute_optional_offset(int& dest_offset,
143 Klass* klass, Symbol* name_symbol, Symbol* signature_symbol,
144 bool allow_super = false) {
145 fieldDescriptor fd;
146 InstanceKlass* ik = InstanceKlass::cast(klass);
147 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
148 dest_offset = fd.offset();
149 }
150 }
151
152
153 int java_lang_String::value_offset = 0;
154 int java_lang_String::hash_offset = 0;
155 int java_lang_String::coder_offset = 0;
156
157 bool java_lang_String::initialized = false;
158
159 bool java_lang_String::is_instance(oop obj) {
160 return is_instance_inlined(obj);
161 }
162
163 void java_lang_String::compute_offsets() {
164 assert(!initialized, "offsets should be initialized only once");
165
166 Klass* k = SystemDictionary::String_klass();
167 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::byte_array_signature());
168 compute_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature());
169 compute_offset(coder_offset, k, vmSymbols::coder_name(), vmSymbols::byte_signature());
170
171 initialized = true;
172 }
173
174 class CompactStringsFixup : public FieldClosure {
175 private:
176 bool _value;
177
178 public:
179 CompactStringsFixup(bool value) : _value(value) {}
180
181 void do_field(fieldDescriptor* fd) {
182 if (fd->name() == vmSymbols::compact_strings_name()) {
183 oop mirror = fd->field_holder()->java_mirror();
184 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
185 assert(mirror != NULL, "String must have mirror already");
186 mirror->bool_field_put(fd->offset(), _value);
187 }
188 }
189 };
190
191 void java_lang_String::set_compact_strings(bool value) {
192 CompactStringsFixup fix(value);
193 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix);
194 }
195
196 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
197 assert(initialized, "Must be initialized");
198 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
199
200 // Create the String object first, so there's a chance that the String
201 // and the char array it points to end up in the same cache line.
202 oop obj;
203 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
204
205 // Create the char array. The String object must be handlized here
206 // because GC can happen as a result of the allocation attempt.
207 Handle h_obj(THREAD, obj);
208 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
209 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
210
211 // Point the String at the char array
212 obj = h_obj();
213 set_value(obj, buffer);
214 // No need to zero the offset, allocation zero'ed the entire String object
215 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
216 return h_obj;
217 }
218
219 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
220 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
221 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
222 typeArrayOop buffer = value(h_obj());
223 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
224 if (is_latin1) {
225 for (int index = 0; index < length; index++) {
226 buffer->byte_at_put(index, (jbyte)unicode[index]);
227 }
228 } else {
229 for (int index = 0; index < length; index++) {
230 buffer->char_at_put(index, unicode[index]);
231 }
232 }
233
234 #ifdef ASSERT
235 {
236 ResourceMark rm;
237 char* expected = UNICODE::as_utf8(unicode, length);
238 char* actual = as_utf8_string(h_obj());
239 if (strcmp(expected, actual) != 0) {
240 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
241 ShouldNotReachHere();
242 }
243 }
244 #endif
245
246 return h_obj;
247 }
248
249 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
250 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
251 return h_obj();
252 }
253
254 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
255 if (utf8_str == NULL) {
256 return Handle();
257 }
258 bool has_multibyte, is_latin1;
259 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
260 if (!CompactStrings) {
261 has_multibyte = true;
262 is_latin1 = false;
263 }
264
265 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
266 if (length > 0) {
267 if (!has_multibyte) {
268 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length);
269 } else if (is_latin1) {
270 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
271 } else {
272 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
273 }
274 }
275
276 #ifdef ASSERT
277 // This check is too strict because the input string is not necessarily valid UTF8.
278 // For example, it may be created with arbitrary content via jni_NewStringUTF.
279 /*
280 {
281 ResourceMark rm;
282 const char* expected = utf8_str;
283 char* actual = as_utf8_string(h_obj());
284 if (strcmp(expected, actual) != 0) {
285 tty->print_cr("String conversion failure: %s --> %s", expected, actual);
286 ShouldNotReachHere();
287 }
288 }
289 */
290 #endif
291
292 return h_obj;
293 }
294
295 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
296 Handle h_obj = create_from_str(utf8_str, CHECK_0);
297 return h_obj();
298 }
299
300 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
301 const char* utf8_str = (char*)symbol->bytes();
302 int utf8_len = symbol->utf8_length();
303
304 bool has_multibyte, is_latin1;
305 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
306 if (!CompactStrings) {
307 has_multibyte = true;
308 is_latin1 = false;
309 }
310
311 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
312 if (length > 0) {
313 if (!has_multibyte) {
314 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length);
315 } else if (is_latin1) {
316 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
317 } else {
318 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
319 }
320 }
321
322 #ifdef ASSERT
323 {
324 ResourceMark rm;
325 const char* expected = symbol->as_utf8();
326 char* actual = as_utf8_string(h_obj());
327 if (strncmp(expected, actual, utf8_len) != 0) {
328 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
329 ShouldNotReachHere();
330 }
331 }
332 #endif
333
334 return h_obj;
335 }
336
337 // Converts a C string to a Java String based on current encoding
338 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
339 assert(str != NULL, "bad arguments");
340
341 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
342 static to_java_string_fn_t _to_java_string_fn = NULL;
343
344 if (_to_java_string_fn == NULL) {
345 void *lib_handle = os::native_java_library();
346 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
347 if (_to_java_string_fn == NULL) {
348 fatal("NewStringPlatform missing");
349 }
350 }
351
352 jstring js = NULL;
353 { JavaThread* thread = (JavaThread*)THREAD;
354 assert(thread->is_Java_thread(), "must be java thread");
355 HandleMark hm(thread);
356 ThreadToNativeFromVM ttn(thread);
357 js = (_to_java_string_fn)(thread->jni_environment(), str);
358 }
359 return Handle(THREAD, JNIHandles::resolve(js));
360 }
361
362 // Converts a Java String to a native C string that can be used for
363 // native OS calls.
364 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
365 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
366 static to_platform_string_fn_t _to_platform_string_fn = NULL;
367
368 if (_to_platform_string_fn == NULL) {
369 void *lib_handle = os::native_java_library();
370 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
371 if (_to_platform_string_fn == NULL) {
372 fatal("GetStringPlatformChars missing");
373 }
374 }
375
376 char *native_platform_string;
377 { JavaThread* thread = (JavaThread*)THREAD;
378 assert(thread->is_Java_thread(), "must be java thread");
379 JNIEnv *env = thread->jni_environment();
380 jstring js = (jstring) JNIHandles::make_local(env, java_string());
381 bool is_copy;
382 HandleMark hm(thread);
383 ThreadToNativeFromVM ttn(thread);
384 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
385 assert(is_copy == JNI_TRUE, "is_copy value changed");
386 JNIHandles::destroy_local(js);
387 }
388 return native_platform_string;
389 }
390
391 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
392 oop obj = java_string();
393 // Typical usage is to convert all '/' to '.' in string.
394 typeArrayOop value = java_lang_String::value(obj);
395 int length = java_lang_String::length(obj);
396 bool is_latin1 = java_lang_String::is_latin1(obj);
397
398 // First check if any from_char exist
399 int index; // Declared outside, used later
400 for (index = 0; index < length; index++) {
401 jchar c = !is_latin1 ? value->char_at(index) :
402 ((jchar) value->byte_at(index)) & 0xff;
403 if (c == from_char) {
404 break;
405 }
406 }
407 if (index == length) {
408 // No from_char, so do not copy.
409 return java_string;
410 }
411
412 // Check if result string will be latin1
413 bool to_is_latin1 = false;
414
415 // Replacement char must be latin1
416 if (CompactStrings && UNICODE::is_latin1(to_char)) {
417 if (is_latin1) {
418 // Source string is latin1 as well
419 to_is_latin1 = true;
420 } else if (!UNICODE::is_latin1(from_char)) {
421 // We are replacing an UTF16 char. Scan string to
422 // check if result can be latin1 encoded.
423 to_is_latin1 = true;
424 for (index = 0; index < length; index++) {
425 jchar c = value->char_at(index);
426 if (c != from_char && !UNICODE::is_latin1(c)) {
427 to_is_latin1 = false;
428 break;
429 }
430 }
431 }
432 }
433
434 // Create new UNICODE (or byte) buffer. Must handlize value because GC
435 // may happen during String and char array creation.
436 typeArrayHandle h_value(THREAD, value);
437 Handle string = basic_create(length, to_is_latin1, CHECK_NH);
438 typeArrayOop from_buffer = h_value();
439 typeArrayOop to_buffer = java_lang_String::value(string());
440
441 // Copy contents
442 for (index = 0; index < length; index++) {
443 jchar c = (!is_latin1) ? from_buffer->char_at(index) :
444 ((jchar) from_buffer->byte_at(index)) & 0xff;
445 if (c == from_char) {
446 c = to_char;
447 }
448 if (!to_is_latin1) {
449 to_buffer->char_at_put(index, c);
450 } else {
451 to_buffer->byte_at_put(index, (jbyte) c);
452 }
453 }
454 return string;
455 }
456
457 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
458 typeArrayOop value = java_lang_String::value(java_string);
459 length = java_lang_String::length(java_string);
460 bool is_latin1 = java_lang_String::is_latin1(java_string);
461
462 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
463 if (result != NULL) {
464 if (!is_latin1) {
465 for (int index = 0; index < length; index++) {
466 result[index] = value->char_at(index);
467 }
468 } else {
469 for (int index = 0; index < length; index++) {
470 result[index] = ((jchar) value->byte_at(index)) & 0xff;
471 }
472 }
473 } else {
474 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
475 }
476 return result;
477 }
478
479 unsigned int java_lang_String::hash_code(oop java_string) {
480 int length = java_lang_String::length(java_string);
481 // Zero length string will hash to zero with String.hashCode() function.
482 if (length == 0) return 0;
483
484 typeArrayOop value = java_lang_String::value(java_string);
485 bool is_latin1 = java_lang_String::is_latin1(java_string);
486
487 if (is_latin1) {
488 return java_lang_String::hash_code(value->byte_at_addr(0), length);
489 } else {
490 return java_lang_String::hash_code(value->char_at_addr(0), length);
491 }
492 }
493
494 char* java_lang_String::as_quoted_ascii(oop java_string) {
495 typeArrayOop value = java_lang_String::value(java_string);
496 int length = java_lang_String::length(java_string);
497 bool is_latin1 = java_lang_String::is_latin1(java_string);
498
499 if (length == 0) return NULL;
500
501 char* result;
502 int result_length;
503 if (!is_latin1) {
504 jchar* base = value->char_at_addr(0);
505 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
506 result = NEW_RESOURCE_ARRAY(char, result_length);
507 UNICODE::as_quoted_ascii(base, length, result, result_length);
508 } else {
509 jbyte* base = value->byte_at_addr(0);
510 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
511 result = NEW_RESOURCE_ARRAY(char, result_length);
512 UNICODE::as_quoted_ascii(base, length, result, result_length);
513 }
514 assert(result_length >= length + 1, "must not be shorter");
515 assert(result_length == (int)strlen(result) + 1, "must match");
516 return result;
517 }
518
519 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) {
520 typeArrayOop value = java_lang_String::value(java_string);
521 int length = java_lang_String::length(java_string);
522 bool is_latin1 = java_lang_String::is_latin1(java_string);
523 if (!is_latin1) {
524 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
525 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
526 return sym;
527 } else {
528 ResourceMark rm;
529 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
530 const char* base = UNICODE::as_utf8(position, length);
531 Symbol* sym = SymbolTable::lookup(base, length, THREAD);
532 return sym;
533 }
534 }
535
536 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
537 typeArrayOop value = java_lang_String::value(java_string);
538 int length = java_lang_String::length(java_string);
539 bool is_latin1 = java_lang_String::is_latin1(java_string);
540 if (!is_latin1) {
541 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
542 return SymbolTable::probe_unicode(base, length);
543 } else {
544 ResourceMark rm;
545 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
546 const char* base = UNICODE::as_utf8(position, length);
547 return SymbolTable::probe(base, length);
548 }
549 }
550
551 int java_lang_String::utf8_length(oop java_string) {
552 typeArrayOop value = java_lang_String::value(java_string);
553 int length = java_lang_String::length(java_string);
554 bool is_latin1 = java_lang_String::is_latin1(java_string);
555 if (length == 0) {
556 return 0;
557 }
558 if (!is_latin1) {
559 return UNICODE::utf8_length(value->char_at_addr(0), length);
560 } else {
561 return UNICODE::utf8_length(value->byte_at_addr(0), length);
562 }
563 }
564
565 char* java_lang_String::as_utf8_string(oop java_string) {
566 typeArrayOop value = java_lang_String::value(java_string);
567 int length = java_lang_String::length(java_string);
568 bool is_latin1 = java_lang_String::is_latin1(java_string);
569 if (!is_latin1) {
570 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
571 return UNICODE::as_utf8(position, length);
572 } else {
573 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
574 return UNICODE::as_utf8(position, length);
575 }
576 }
577
578 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
579 typeArrayOop value = java_lang_String::value(java_string);
580 int length = java_lang_String::length(java_string);
581 bool is_latin1 = java_lang_String::is_latin1(java_string);
582 if (!is_latin1) {
583 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
584 return UNICODE::as_utf8(position, length, buf, buflen);
585 } else {
586 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
587 return UNICODE::as_utf8(position, length, buf, buflen);
588 }
589 }
590
591 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
592 typeArrayOop value = java_lang_String::value(java_string);
593 int length = java_lang_String::length(java_string);
594 assert(start + len <= length, "just checking");
595 bool is_latin1 = java_lang_String::is_latin1(java_string);
596 if (!is_latin1) {
597 jchar* position = value->char_at_addr(start);
598 return UNICODE::as_utf8(position, len);
599 } else {
600 jbyte* position = value->byte_at_addr(start);
601 return UNICODE::as_utf8(position, len);
602 }
603 }
604
605 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) {
606 typeArrayOop value = java_lang_String::value(java_string);
607 int length = java_lang_String::length(java_string);
608 assert(start + len <= length, "just checking");
609 bool is_latin1 = java_lang_String::is_latin1(java_string);
610 if (!is_latin1) {
611 jchar* position = value->char_at_addr(start);
612 return UNICODE::as_utf8(position, len, buf, buflen);
613 } else {
614 jbyte* position = value->byte_at_addr(start);
615 return UNICODE::as_utf8(position, len, buf, buflen);
616 }
617 }
618
619 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
620 assert(java_string->klass() == SystemDictionary::String_klass(),
621 "must be java_string");
622 typeArrayOop value = java_lang_String::value(java_string);
623 int length = java_lang_String::length(java_string);
624 if (length != len) {
625 return false;
626 }
627 bool is_latin1 = java_lang_String::is_latin1(java_string);
628 if (!is_latin1) {
629 for (int i = 0; i < len; i++) {
630 if (value->char_at(i) != chars[i]) {
631 return false;
632 }
633 }
634 } else {
635 for (int i = 0; i < len; i++) {
636 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
637 return false;
638 }
639 }
640 }
641 return true;
642 }
643
644 bool java_lang_String::equals(oop str1, oop str2) {
645 assert(str1->klass() == SystemDictionary::String_klass(),
646 "must be java String");
647 assert(str2->klass() == SystemDictionary::String_klass(),
648 "must be java String");
649 typeArrayOop value1 = java_lang_String::value(str1);
650 int length1 = java_lang_String::length(str1);
651 bool is_latin1 = java_lang_String::is_latin1(str1);
652 typeArrayOop value2 = java_lang_String::value(str2);
653 int length2 = java_lang_String::length(str2);
654 bool is_latin2 = java_lang_String::is_latin1(str2);
655
656 if ((length1 != length2) || (is_latin1 != is_latin2)) {
657 // Strings of different size or with different
658 // coders are never equal.
659 return false;
660 }
661 int blength1 = value1->length();
662 for (int i = 0; i < value1->length(); i++) {
663 if (value1->byte_at(i) != value2->byte_at(i)) {
664 return false;
665 }
666 }
667 return true;
668 }
669
670 void java_lang_String::print(oop java_string, outputStream* st) {
671 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
672 typeArrayOop value = java_lang_String::value(java_string);
673
674 if (value == NULL) {
675 // This can happen if, e.g., printing a String
676 // object before its initializer has been called
677 st->print("NULL");
678 return;
679 }
680
681 int length = java_lang_String::length(java_string);
682 bool is_latin1 = java_lang_String::is_latin1(java_string);
683
684 st->print("\"");
685 for (int index = 0; index < length; index++) {
686 st->print("%c", (!is_latin1) ? value->char_at(index) :
687 ((jchar) value->byte_at(index)) & 0xff );
688 }
689 st->print("\"");
690 }
691
692
693 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
694 assert(mirror.not_null() && fd->is_static(), "just checking");
695 if (fd->has_initial_value()) {
696 BasicType t = fd->field_type();
697 switch (t) {
698 case T_BYTE:
699 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
700 break;
701 case T_BOOLEAN:
702 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
703 break;
704 case T_CHAR:
705 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
706 break;
707 case T_SHORT:
708 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
709 break;
710 case T_INT:
711 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
712 break;
713 case T_FLOAT:
714 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
715 break;
716 case T_DOUBLE:
717 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
718 break;
719 case T_LONG:
720 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
721 break;
722 case T_OBJECT:
723 {
724 #ifdef ASSERT
725 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
726 assert(fd->signature() == sym, "just checking");
727 #endif
728 oop string = fd->string_initial_value(CHECK);
729 mirror()->obj_field_put(fd->offset(), string);
730 }
731 break;
732 default:
733 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
734 "Illegal ConstantValue attribute in class file");
735 }
736 }
737 }
738
739
740 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
741 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
742
743 // If the offset was read from the shared archive, it was fixed up already
744 if (!k->is_shared()) {
745 if (k->is_instance_klass()) {
746 // During bootstrap, java.lang.Class wasn't loaded so static field
747 // offsets were computed without the size added it. Go back and
748 // update all the static field offsets to included the size.
749 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) {
750 if (fs.access_flags().is_static()) {
751 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
752 fs.set_offset(real_offset);
753 }
754 }
755 }
756 }
757 create_mirror(k, Handle(), Handle(), Handle(), CHECK);
758 }
759
760 void java_lang_Class::initialize_mirror_fields(Klass* k,
761 Handle mirror,
762 Handle protection_domain,
763 TRAPS) {
764 // Allocate a simple java object for a lock.
765 // This needs to be a java object because during class initialization
766 // it can be held across a java call.
767 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
768 set_init_lock(mirror(), r);
769
770 // Set protection domain also
771 set_protection_domain(mirror(), protection_domain());
772
773 // Initialize static fields
774 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
775 }
776
777 // Set the java.lang.Module module field in the java_lang_Class mirror
778 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
779 if (module.is_null()) {
780 // During startup, the module may be NULL only if java.base has not been defined yet.
781 // Put the class on the fixup_module_list to patch later when the java.lang.Module
782 // for java.base is known.
783 assert(!Universe::is_module_initialized(), "Incorrect java.lang.Module pre module system initialization");
784
785 bool javabase_was_defined = false;
786 {
787 MutexLocker m1(Module_lock, THREAD);
788 // Keep list of classes needing java.base module fixup
789 if (!ModuleEntryTable::javabase_defined()) {
790 if (fixup_module_field_list() == NULL) {
791 GrowableArray<Klass*>* list =
792 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
793 set_fixup_module_field_list(list);
794 }
795 k->class_loader_data()->inc_keep_alive();
796 fixup_module_field_list()->push(k);
797 } else {
798 javabase_was_defined = true;
799 }
800 }
801
802 // If java.base was already defined then patch this particular class with java.base.
803 if (javabase_was_defined) {
804 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
805 assert(javabase_entry != NULL && javabase_entry->module() != NULL,
806 "Setting class module field, " JAVA_BASE_NAME " should be defined");
807 Handle javabase_handle(THREAD, JNIHandles::resolve(javabase_entry->module()));
808 set_module(mirror(), javabase_handle());
809 }
810 } else {
811 assert(Universe::is_module_initialized() ||
812 (ModuleEntryTable::javabase_defined() &&
813 (module() == JNIHandles::resolve(ModuleEntryTable::javabase_moduleEntry()->module()))),
814 "Incorrect java.lang.Module specification while creating mirror");
815 set_module(mirror(), module());
816 }
817 }
818
819 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
820 Handle module, Handle protection_domain, TRAPS) {
821 assert(k->java_mirror() == NULL, "should only assign mirror once");
822 // Use this moment of initialization to cache modifier_flags also,
823 // to support Class.getModifiers(). Instance classes recalculate
824 // the cached flags after the class file is parsed, but before the
825 // class is put into the system dictionary.
826 int computed_modifiers = k->compute_modifier_flags(CHECK);
827 k->set_modifier_flags(computed_modifiers);
828 // Class_klass has to be loaded because it is used to allocate
829 // the mirror.
830 if (SystemDictionary::Class_klass_loaded()) {
831 // Allocate mirror (java.lang.Class instance)
832 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
833 Handle mirror(THREAD, mirror_oop);
834
835 // Setup indirection from mirror->klass
836 if (k != NULL) {
837 java_lang_Class::set_klass(mirror(), k);
838 }
839
840 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
841 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
842
843 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
844
845 // It might also have a component mirror. This mirror must already exist.
846 if (k->is_array_klass()) {
847 oop comp_mirror;
848 if (k->is_typeArray_klass()) {
849 BasicType type = TypeArrayKlass::cast(k)->element_type();
850 comp_mirror = Universe::java_mirror(type);
851 } else {
852 assert(k->is_objArray_klass(), "Must be");
853 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
854 assert(element_klass != NULL, "Must have an element klass");
855 comp_mirror = element_klass->java_mirror();
856 }
857 assert(comp_mirror != NULL, "must have a mirror");
858
859 // Two-way link between the array klass and its component mirror:
860 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
861 set_component_mirror(mirror(), comp_mirror);
862 set_array_klass(comp_mirror, k);
863 } else {
864 assert(k->is_instance_klass(), "Must be");
865
866 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
867 if (HAS_PENDING_EXCEPTION) {
868 // If any of the fields throws an exception like OOM remove the klass field
869 // from the mirror so GC doesn't follow it after the klass has been deallocated.
870 // This mirror looks like a primitive type, which logically it is because it
871 // it represents no class.
872 java_lang_Class::set_klass(mirror(), NULL);
873 return;
874 }
875 }
876
877 // set the classLoader field in the java_lang_Class instance
878 assert(class_loader() == k->class_loader(), "should be same");
879 set_class_loader(mirror(), class_loader());
880
881 // set the module field in the java_lang_Class instance
882 set_mirror_module_field(k, mirror, module, THREAD);
883
884 // Setup indirection from klass->mirror last
885 // after any exceptions can happen during allocations.
886 if (k != NULL) {
887 k->set_java_mirror(mirror());
888 }
889 } else {
890 if (fixup_mirror_list() == NULL) {
891 GrowableArray<Klass*>* list =
892 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
893 set_fixup_mirror_list(list);
894 }
895 fixup_mirror_list()->push(k);
896 }
897 }
898
899 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
900 assert(_module_offset != 0, "must have been computed already");
901 java_lang_Class::set_module(k->java_mirror(), module());
902 }
903
904 int java_lang_Class::oop_size(oop java_class) {
905 assert(_oop_size_offset != 0, "must be set");
906 int size = java_class->int_field(_oop_size_offset);
907 assert(size > 0, "Oop size must be greater than zero, not %d", size);
908 return size;
909 }
910
911 void java_lang_Class::set_oop_size(oop java_class, int size) {
912 assert(_oop_size_offset != 0, "must be set");
913 assert(size > 0, "Oop size must be greater than zero, not %d", size);
914 java_class->int_field_put(_oop_size_offset, size);
915 }
916
917 int java_lang_Class::static_oop_field_count(oop java_class) {
918 assert(_static_oop_field_count_offset != 0, "must be set");
919 return java_class->int_field(_static_oop_field_count_offset);
920 }
921 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
922 assert(_static_oop_field_count_offset != 0, "must be set");
923 java_class->int_field_put(_static_oop_field_count_offset, size);
924 }
925
926 oop java_lang_Class::protection_domain(oop java_class) {
927 assert(_protection_domain_offset != 0, "must be set");
928 return java_class->obj_field(_protection_domain_offset);
929 }
930 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
931 assert(_protection_domain_offset != 0, "must be set");
932 java_class->obj_field_put(_protection_domain_offset, pd);
933 }
934
935 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
936 assert(_component_mirror_offset != 0, "must be set");
937 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
938 }
939 oop java_lang_Class::component_mirror(oop java_class) {
940 assert(_component_mirror_offset != 0, "must be set");
941 return java_class->obj_field(_component_mirror_offset);
942 }
943
944 oop java_lang_Class::init_lock(oop java_class) {
945 assert(_init_lock_offset != 0, "must be set");
946 return java_class->obj_field(_init_lock_offset);
947 }
948 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
949 assert(_init_lock_offset != 0, "must be set");
950 java_class->obj_field_put(_init_lock_offset, init_lock);
951 }
952
953 objArrayOop java_lang_Class::signers(oop java_class) {
954 assert(_signers_offset != 0, "must be set");
955 return (objArrayOop)java_class->obj_field(_signers_offset);
956 }
957 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
958 assert(_signers_offset != 0, "must be set");
959 java_class->obj_field_put(_signers_offset, (oop)signers);
960 }
961
962
963 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
964 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
965 if (_class_loader_offset != 0) {
966 java_class->obj_field_put(_class_loader_offset, loader);
967 }
968 }
969
970 oop java_lang_Class::class_loader(oop java_class) {
971 assert(_class_loader_offset != 0, "must be set");
972 return java_class->obj_field(_class_loader_offset);
973 }
974
975 oop java_lang_Class::module(oop java_class) {
976 assert(_module_offset != 0, "must be set");
977 return java_class->obj_field(_module_offset);
978 }
979
980 void java_lang_Class::set_module(oop java_class, oop module) {
981 assert(_module_offset != 0, "must be set");
982 java_class->obj_field_put(_module_offset, module);
983 }
984
985 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
986 // This should be improved by adding a field at the Java level or by
987 // introducing a new VM klass (see comment in ClassFileParser)
988 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
989 if (type != T_VOID) {
990 Klass* aklass = Universe::typeArrayKlassObj(type);
991 assert(aklass != NULL, "correct bootstrap");
992 set_array_klass(java_class, aklass);
993 }
994 #ifdef ASSERT
995 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
996 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
997 #endif
998 return java_class;
999 }
1000
1001
1002 Klass* java_lang_Class::as_Klass(oop java_class) {
1003 //%note memory_2
1004 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1005 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1006 assert(k == NULL || k->is_klass(), "type check");
1007 return k;
1008 }
1009
1010
1011 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1012 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1013 java_class->metadata_field_put(_klass_offset, klass);
1014 }
1015
1016
1017 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1018 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1019 Symbol* name = NULL;
1020 bool is_instance = false;
1021 if (is_primitive(java_class)) {
1022 name = vmSymbols::type_signature(primitive_type(java_class));
1023 } else {
1024 Klass* k = as_Klass(java_class);
1025 is_instance = k->is_instance_klass();
1026 name = k->name();
1027 }
1028 if (name == NULL) {
1029 st->print("<null>");
1030 return;
1031 }
1032 if (is_instance) st->print("L");
1033 st->write((char*) name->base(), (int) name->utf8_length());
1034 if (is_instance) st->print(";");
1035 }
1036
1037 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
1038 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1039 Symbol* name;
1040 if (is_primitive(java_class)) {
1041 name = vmSymbols::type_signature(primitive_type(java_class));
1042 // Because this can create a new symbol, the caller has to decrement
1043 // the refcount, so make adjustment here and below for symbols returned
1044 // that are not created or incremented due to a successful lookup.
1045 name->increment_refcount();
1046 } else {
1047 Klass* k = as_Klass(java_class);
1048 if (!k->is_instance_klass()) {
1049 name = k->name();
1050 name->increment_refcount();
1051 } else {
1052 ResourceMark rm;
1053 const char* sigstr = k->signature_name();
1054 int siglen = (int) strlen(sigstr);
1055 if (!intern_if_not_found) {
1056 name = SymbolTable::probe(sigstr, siglen);
1057 } else {
1058 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
1059 }
1060 }
1061 }
1062 return name;
1063 }
1064
1065 // Returns the Java name for this Java mirror (Resource allocated)
1066 // See Klass::external_name().
1067 // For primitive type Java mirrors, its type name is returned.
1068 const char* java_lang_Class::as_external_name(oop java_class) {
1069 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1070 const char* name = NULL;
1071 if (is_primitive(java_class)) {
1072 name = type2name(primitive_type(java_class));
1073 } else {
1074 name = as_Klass(java_class)->external_name();
1075 }
1076 if (name == NULL) {
1077 name = "<null>";
1078 }
1079 return name;
1080 }
1081
1082 Klass* java_lang_Class::array_klass(oop java_class) {
1083 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
1084 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1085 return k;
1086 }
1087
1088
1089 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
1090 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1091 java_class->metadata_field_put(_array_klass_offset, klass);
1092 }
1093
1094
1095 bool java_lang_Class::is_primitive(oop java_class) {
1096 // should assert:
1097 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1098 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
1099
1100 #ifdef ASSERT
1101 if (is_primitive) {
1102 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
1103 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
1104 "Should be either the T_VOID primitive or a java primitive");
1105 }
1106 #endif
1107
1108 return is_primitive;
1109 }
1110
1111
1112 BasicType java_lang_Class::primitive_type(oop java_class) {
1113 assert(java_lang_Class::is_primitive(java_class), "just checking");
1114 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1115 BasicType type = T_VOID;
1116 if (ak != NULL) {
1117 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1118 type = ArrayKlass::cast(ak)->element_type();
1119 } else {
1120 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1121 }
1122 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1123 return type;
1124 }
1125
1126 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1127 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1128 if (is_primitive(java_class)) {
1129 if (reference_klass != NULL)
1130 (*reference_klass) = NULL;
1131 return primitive_type(java_class);
1132 } else {
1133 if (reference_klass != NULL)
1134 (*reference_klass) = as_Klass(java_class);
1135 return T_OBJECT;
1136 }
1137 }
1138
1139
1140 oop java_lang_Class::primitive_mirror(BasicType t) {
1141 oop mirror = Universe::java_mirror(t);
1142 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1143 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1144 return mirror;
1145 }
1146
1147 bool java_lang_Class::offsets_computed = false;
1148 int java_lang_Class::classRedefinedCount_offset = -1;
1149
1150 void java_lang_Class::compute_offsets() {
1151 assert(!offsets_computed, "offsets should be initialized only once");
1152 offsets_computed = true;
1153
1154 Klass* k = SystemDictionary::Class_klass();
1155 // The classRedefinedCount field is only present starting in 1.5,
1156 // so don't go fatal.
1157 compute_optional_offset(classRedefinedCount_offset,
1158 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
1159
1160 // Needs to be optional because the old build runs Queens during bootstrapping
1161 // and jdk8-9 doesn't have coordinated pushes yet.
1162 compute_optional_offset(_class_loader_offset,
1163 k, vmSymbols::classLoader_name(),
1164 vmSymbols::classloader_signature());
1165
1166 compute_offset(_component_mirror_offset,
1167 k, vmSymbols::componentType_name(),
1168 vmSymbols::class_signature());
1169
1170 compute_offset(_module_offset,
1171 k, vmSymbols::module_name(),
1172 vmSymbols::module_signature());
1173
1174 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1175 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1176 // GC treats them the same.
1177 _init_lock_offset = _component_mirror_offset;
1178
1179 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1180 }
1181
1182 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1183 if (classRedefinedCount_offset == -1) {
1184 // If we don't have an offset for it then just return -1 as a marker.
1185 return -1;
1186 }
1187
1188 return the_class_mirror->int_field(classRedefinedCount_offset);
1189 }
1190
1191 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1192 if (classRedefinedCount_offset == -1) {
1193 // If we don't have an offset for it then nothing to set.
1194 return;
1195 }
1196
1197 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1198 }
1199
1200
1201 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1202 // platform thread structure, and a eetop offset which was used for thread
1203 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1204 // merged, so in the HotSpot VM we just use the eetop field for the thread
1205 // instead of the privateInfo_offset.
1206 //
1207 // Note: The stackSize field is only present starting in 1.4.
1208
1209 int java_lang_Thread::_name_offset = 0;
1210 int java_lang_Thread::_group_offset = 0;
1211 int java_lang_Thread::_contextClassLoader_offset = 0;
1212 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1213 int java_lang_Thread::_priority_offset = 0;
1214 int java_lang_Thread::_eetop_offset = 0;
1215 int java_lang_Thread::_daemon_offset = 0;
1216 int java_lang_Thread::_stillborn_offset = 0;
1217 int java_lang_Thread::_stackSize_offset = 0;
1218 int java_lang_Thread::_tid_offset = 0;
1219 int java_lang_Thread::_thread_status_offset = 0;
1220 int java_lang_Thread::_park_blocker_offset = 0;
1221 int java_lang_Thread::_park_event_offset = 0 ;
1222
1223
1224 void java_lang_Thread::compute_offsets() {
1225 assert(_group_offset == 0, "offsets should be initialized only once");
1226
1227 Klass* k = SystemDictionary::Thread_klass();
1228 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1229 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
1230 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
1231 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
1232 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
1233 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1234 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
1235 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
1236 // The stackSize field is only present starting in 1.4, so don't go fatal.
1237 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
1238 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
1239 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
1240 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
1241 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
1242 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
1243 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
1244 vmSymbols::long_signature());
1245 }
1246
1247
1248 JavaThread* java_lang_Thread::thread(oop java_thread) {
1249 return (JavaThread*)java_thread->address_field(_eetop_offset);
1250 }
1251
1252
1253 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1254 java_thread->address_field_put(_eetop_offset, (address)thread);
1255 }
1256
1257
1258 oop java_lang_Thread::name(oop java_thread) {
1259 return java_thread->obj_field(_name_offset);
1260 }
1261
1262
1263 void java_lang_Thread::set_name(oop java_thread, oop name) {
1264 java_thread->obj_field_put(_name_offset, name);
1265 }
1266
1267
1268 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1269 return (ThreadPriority)java_thread->int_field(_priority_offset);
1270 }
1271
1272
1273 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1274 java_thread->int_field_put(_priority_offset, priority);
1275 }
1276
1277
1278 oop java_lang_Thread::threadGroup(oop java_thread) {
1279 return java_thread->obj_field(_group_offset);
1280 }
1281
1282
1283 bool java_lang_Thread::is_stillborn(oop java_thread) {
1284 return java_thread->bool_field(_stillborn_offset) != 0;
1285 }
1286
1287
1288 // We never have reason to turn the stillborn bit off
1289 void java_lang_Thread::set_stillborn(oop java_thread) {
1290 java_thread->bool_field_put(_stillborn_offset, true);
1291 }
1292
1293
1294 bool java_lang_Thread::is_alive(oop java_thread) {
1295 JavaThread* thr = java_lang_Thread::thread(java_thread);
1296 return (thr != NULL);
1297 }
1298
1299
1300 bool java_lang_Thread::is_daemon(oop java_thread) {
1301 return java_thread->bool_field(_daemon_offset) != 0;
1302 }
1303
1304
1305 void java_lang_Thread::set_daemon(oop java_thread) {
1306 java_thread->bool_field_put(_daemon_offset, true);
1307 }
1308
1309 oop java_lang_Thread::context_class_loader(oop java_thread) {
1310 return java_thread->obj_field(_contextClassLoader_offset);
1311 }
1312
1313 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1314 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1315 }
1316
1317
1318 jlong java_lang_Thread::stackSize(oop java_thread) {
1319 if (_stackSize_offset > 0) {
1320 return java_thread->long_field(_stackSize_offset);
1321 } else {
1322 return 0;
1323 }
1324 }
1325
1326 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1327 void java_lang_Thread::set_thread_status(oop java_thread,
1328 java_lang_Thread::ThreadStatus status) {
1329 // The threadStatus is only present starting in 1.5
1330 if (_thread_status_offset > 0) {
1331 java_thread->int_field_put(_thread_status_offset, status);
1332 }
1333 }
1334
1335 // Read thread status value from threadStatus field in java.lang.Thread java class.
1336 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1337 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() ||
1338 JavaThread::current()->thread_state() == _thread_in_vm,
1339 "Java Thread is not running in vm");
1340 // The threadStatus is only present starting in 1.5
1341 if (_thread_status_offset > 0) {
1342 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1343 } else {
1344 // All we can easily figure out is if it is alive, but that is
1345 // enough info for a valid unknown status.
1346 // These aren't restricted to valid set ThreadStatus values, so
1347 // use JVMTI values and cast.
1348 JavaThread* thr = java_lang_Thread::thread(java_thread);
1349 if (thr == NULL) {
1350 // the thread hasn't run yet or is in the process of exiting
1351 return NEW;
1352 }
1353 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1354 }
1355 }
1356
1357
1358 jlong java_lang_Thread::thread_id(oop java_thread) {
1359 // The thread ID field is only present starting in 1.5
1360 if (_tid_offset > 0) {
1361 return java_thread->long_field(_tid_offset);
1362 } else {
1363 return 0;
1364 }
1365 }
1366
1367 oop java_lang_Thread::park_blocker(oop java_thread) {
1368 assert(JDK_Version::current().supports_thread_park_blocker() &&
1369 _park_blocker_offset != 0, "Must support parkBlocker field");
1370
1371 if (_park_blocker_offset > 0) {
1372 return java_thread->obj_field(_park_blocker_offset);
1373 }
1374
1375 return NULL;
1376 }
1377
1378 jlong java_lang_Thread::park_event(oop java_thread) {
1379 if (_park_event_offset > 0) {
1380 return java_thread->long_field(_park_event_offset);
1381 }
1382 return 0;
1383 }
1384
1385 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1386 if (_park_event_offset > 0) {
1387 java_thread->long_field_put(_park_event_offset, ptr);
1388 return true;
1389 }
1390 return false;
1391 }
1392
1393
1394 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1395 assert(_thread_status_offset != 0, "Must have thread status");
1396 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1397 switch (status) {
1398 case NEW : return "NEW";
1399 case RUNNABLE : return "RUNNABLE";
1400 case SLEEPING : return "TIMED_WAITING (sleeping)";
1401 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1402 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1403 case PARKED : return "WAITING (parking)";
1404 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1405 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1406 case TERMINATED : return "TERMINATED";
1407 default : return "UNKNOWN";
1408 };
1409 }
1410 int java_lang_ThreadGroup::_parent_offset = 0;
1411 int java_lang_ThreadGroup::_name_offset = 0;
1412 int java_lang_ThreadGroup::_threads_offset = 0;
1413 int java_lang_ThreadGroup::_groups_offset = 0;
1414 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1415 int java_lang_ThreadGroup::_destroyed_offset = 0;
1416 int java_lang_ThreadGroup::_daemon_offset = 0;
1417 int java_lang_ThreadGroup::_nthreads_offset = 0;
1418 int java_lang_ThreadGroup::_ngroups_offset = 0;
1419
1420 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1421 assert(java_thread_group->is_oop(), "thread group must be oop");
1422 return java_thread_group->obj_field(_parent_offset);
1423 }
1424
1425 // ("name as oop" accessor is not necessary)
1426
1427 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1428 oop name = java_thread_group->obj_field(_name_offset);
1429 // ThreadGroup.name can be null
1430 if (name != NULL) {
1431 return java_lang_String::as_utf8_string(name);
1432 }
1433 return NULL;
1434 }
1435
1436 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1437 assert(java_thread_group->is_oop(), "thread group must be oop");
1438 return java_thread_group->int_field(_nthreads_offset);
1439 }
1440
1441 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1442 oop threads = java_thread_group->obj_field(_threads_offset);
1443 assert(threads != NULL, "threadgroups should have threads");
1444 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1445 return objArrayOop(threads);
1446 }
1447
1448 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1449 assert(java_thread_group->is_oop(), "thread group must be oop");
1450 return java_thread_group->int_field(_ngroups_offset);
1451 }
1452
1453 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1454 oop groups = java_thread_group->obj_field(_groups_offset);
1455 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1456 return objArrayOop(groups);
1457 }
1458
1459 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1460 assert(java_thread_group->is_oop(), "thread group must be oop");
1461 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1462 }
1463
1464 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1465 assert(java_thread_group->is_oop(), "thread group must be oop");
1466 return java_thread_group->bool_field(_destroyed_offset) != 0;
1467 }
1468
1469 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1470 assert(java_thread_group->is_oop(), "thread group must be oop");
1471 return java_thread_group->bool_field(_daemon_offset) != 0;
1472 }
1473
1474 void java_lang_ThreadGroup::compute_offsets() {
1475 assert(_parent_offset == 0, "offsets should be initialized only once");
1476
1477 Klass* k = SystemDictionary::ThreadGroup_klass();
1478
1479 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1480 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1481 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1482 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1483 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1484 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1485 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1486 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1487 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1488 }
1489
1490
1491 void java_lang_Throwable::compute_offsets() {
1492 Klass* k = SystemDictionary::Throwable_klass();
1493 compute_offset(depth_offset, k, vmSymbols::depth_name(), vmSymbols::int_signature());
1494 }
1495
1496 oop java_lang_Throwable::unassigned_stacktrace() {
1497 InstanceKlass* ik = SystemDictionary::Throwable_klass();
1498 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1499 if (UseCompressedOops) {
1500 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1501 } else {
1502 return oopDesc::load_decode_heap_oop((oop*)addr);
1503 }
1504 }
1505
1506 oop java_lang_Throwable::backtrace(oop throwable) {
1507 return throwable->obj_field_acquire(backtrace_offset);
1508 }
1509
1510
1511 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1512 throwable->release_obj_field_put(backtrace_offset, value);
1513 }
1514
1515 int java_lang_Throwable::depth(oop throwable) {
1516 return throwable->int_field(depth_offset);
1517 }
1518
1519 void java_lang_Throwable::set_depth(oop throwable, int value) {
1520 throwable->int_field_put(depth_offset, value);
1521 }
1522
1523 oop java_lang_Throwable::message(oop throwable) {
1524 return throwable->obj_field(detailMessage_offset);
1525 }
1526
1527
1528 // Return Symbol for detailed_message or NULL
1529 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1530 PRESERVE_EXCEPTION_MARK; // Keep original exception
1531 oop detailed_message = java_lang_Throwable::message(throwable);
1532 if (detailed_message != NULL) {
1533 return java_lang_String::as_symbol(detailed_message, THREAD);
1534 }
1535 return NULL;
1536 }
1537
1538 void java_lang_Throwable::set_message(oop throwable, oop value) {
1539 throwable->obj_field_put(detailMessage_offset, value);
1540 }
1541
1542
1543 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1544 throwable->obj_field_put(stackTrace_offset, st_element_array);
1545 }
1546
1547 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1548 set_stacktrace(throwable, NULL);
1549 }
1550
1551
1552 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1553 ResourceMark rm;
1554 Klass* k = throwable->klass();
1555 assert(k != NULL, "just checking");
1556 st->print("%s", k->external_name());
1557 oop msg = message(throwable);
1558 if (msg != NULL) {
1559 st->print(": %s", java_lang_String::as_utf8_string(msg));
1560 }
1561 }
1562
1563 // After this many redefines, the stack trace is unreliable.
1564 const int MAX_VERSION = USHRT_MAX;
1565
1566 static inline bool version_matches(Method* method, int version) {
1567 assert(version < MAX_VERSION, "version is too big");
1568 return method != NULL && (method->constants()->version() == version);
1569 }
1570
1571
1572 // This class provides a simple wrapper over the internal structure of
1573 // exception backtrace to insulate users of the backtrace from needing
1574 // to know what it looks like.
1575 class BacktraceBuilder: public StackObj {
1576 friend class BacktraceIterator;
1577 private:
1578 Handle _backtrace;
1579 objArrayOop _head;
1580 typeArrayOop _methods;
1581 typeArrayOop _bcis;
1582 objArrayOop _mirrors;
1583 typeArrayOop _names; // needed to insulate method name against redefinition
1584 int _index;
1585 NoSafepointVerifier _nsv;
1586
1587 enum {
1588 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1589 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1590 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1591 trace_names_offset = java_lang_Throwable::trace_names_offset,
1592 trace_next_offset = java_lang_Throwable::trace_next_offset,
1593 trace_size = java_lang_Throwable::trace_size,
1594 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1595 };
1596
1597 // get info out of chunks
1598 static typeArrayOop get_methods(objArrayHandle chunk) {
1599 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1600 assert(methods != NULL, "method array should be initialized in backtrace");
1601 return methods;
1602 }
1603 static typeArrayOop get_bcis(objArrayHandle chunk) {
1604 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1605 assert(bcis != NULL, "bci array should be initialized in backtrace");
1606 return bcis;
1607 }
1608 static objArrayOop get_mirrors(objArrayHandle chunk) {
1609 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1610 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1611 return mirrors;
1612 }
1613 static typeArrayOop get_names(objArrayHandle chunk) {
1614 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
1615 assert(names != NULL, "names array should be initialized in backtrace");
1616 return names;
1617 }
1618
1619 public:
1620
1621 // constructor for new backtrace
1622 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _names(NULL) {
1623 expand(CHECK);
1624 _backtrace = Handle(THREAD, _head);
1625 _index = 0;
1626 }
1627
1628 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
1629 _methods = get_methods(backtrace);
1630 _bcis = get_bcis(backtrace);
1631 _mirrors = get_mirrors(backtrace);
1632 _names = get_names(backtrace);
1633 assert(_methods->length() == _bcis->length() &&
1634 _methods->length() == _mirrors->length() &&
1635 _mirrors->length() == _names->length(),
1636 "method and source information arrays should match");
1637
1638 // head is the preallocated backtrace
1639 _head = backtrace();
1640 _backtrace = Handle(thread, _head);
1641 _index = 0;
1642 }
1643
1644 void expand(TRAPS) {
1645 objArrayHandle old_head(THREAD, _head);
1646 PauseNoSafepointVerifier pnsv(&_nsv);
1647
1648 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1649 objArrayHandle new_head(THREAD, head);
1650
1651 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1652 typeArrayHandle new_methods(THREAD, methods);
1653
1654 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1655 typeArrayHandle new_bcis(THREAD, bcis);
1656
1657 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1658 objArrayHandle new_mirrors(THREAD, mirrors);
1659
1660 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
1661 typeArrayHandle new_names(THREAD, names);
1662
1663 if (!old_head.is_null()) {
1664 old_head->obj_at_put(trace_next_offset, new_head());
1665 }
1666 new_head->obj_at_put(trace_methods_offset, new_methods());
1667 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1668 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1669 new_head->obj_at_put(trace_names_offset, new_names());
1670
1671 _head = new_head();
1672 _methods = new_methods();
1673 _bcis = new_bcis();
1674 _mirrors = new_mirrors();
1675 _names = new_names();
1676 _index = 0;
1677 }
1678
1679 oop backtrace() {
1680 return _backtrace();
1681 }
1682
1683 inline void push(Method* method, int bci, TRAPS) {
1684 // Smear the -1 bci to 0 since the array only holds unsigned
1685 // shorts. The later line number lookup would just smear the -1
1686 // to a 0 even if it could be recorded.
1687 if (bci == SynchronizationEntryBCI) bci = 0;
1688
1689 if (_index >= trace_chunk_size) {
1690 methodHandle mhandle(THREAD, method);
1691 expand(CHECK);
1692 method = mhandle();
1693 }
1694
1695 _methods->short_at_put(_index, method->orig_method_idnum());
1696 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
1697
1698 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
1699 // klass owning the symbols alive so their refcounts aren't decremented.
1700 Symbol* name = method->name();
1701 _names->symbol_at_put(_index, name);
1702
1703 // We need to save the mirrors in the backtrace to keep the class
1704 // from being unloaded while we still have this stack trace.
1705 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1706 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1707 _index++;
1708 }
1709
1710 };
1711
1712 struct BacktraceElement : public StackObj {
1713 int _method_id;
1714 int _bci;
1715 int _version;
1716 Symbol* _name;
1717 Handle _mirror;
1718 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
1719 _mirror(mirror), _method_id(mid), _version(version), _bci(bci), _name(name) {}
1720 };
1721
1722 class BacktraceIterator : public StackObj {
1723 int _index;
1724 objArrayHandle _result;
1725 objArrayHandle _mirrors;
1726 typeArrayHandle _methods;
1727 typeArrayHandle _bcis;
1728 typeArrayHandle _names;
1729
1730 void init(objArrayHandle result, Thread* thread) {
1731 // Get method id, bci, version and mirror from chunk
1732 _result = result;
1733 if (_result.not_null()) {
1734 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
1735 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
1736 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
1737 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
1738 _index = 0;
1739 }
1740 }
1741 public:
1742 BacktraceIterator(objArrayHandle result, Thread* thread) {
1743 init(result, thread);
1744 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
1745 }
1746
1747 BacktraceElement next(Thread* thread) {
1748 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
1749 _methods->short_at(_index),
1750 Backtrace::version_at(_bcis->int_at(_index)),
1751 Backtrace::bci_at(_bcis->int_at(_index)),
1752 _names->symbol_at(_index));
1753 _index++;
1754
1755 if (_index >= java_lang_Throwable::trace_chunk_size) {
1756 int next_offset = java_lang_Throwable::trace_next_offset;
1757 // Get next chunk
1758 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
1759 init(result, thread);
1760 }
1761 return e;
1762 }
1763
1764 bool repeat() {
1765 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
1766 }
1767 };
1768
1769
1770 // Print stack trace element to resource allocated buffer
1771 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
1772 int version, int bci, Symbol* name) {
1773 ResourceMark rm;
1774
1775 // Get strings and string lengths
1776 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1777 const char* klass_name = holder->external_name();
1778 int buf_len = (int)strlen(klass_name);
1779
1780 char* method_name = name->as_C_string();
1781 buf_len += (int)strlen(method_name);
1782
1783 char* source_file_name = NULL;
1784 Symbol* source = Backtrace::get_source_file_name(holder, version);
1785 if (source != NULL) {
1786 source_file_name = source->as_C_string();
1787 buf_len += (int)strlen(source_file_name);
1788 }
1789
1790 char *module_name = NULL, *module_version = NULL;
1791 ModuleEntry* module = holder->module();
1792 if (module->is_named()) {
1793 module_name = module->name()->as_C_string();
1794 buf_len += (int)strlen(module_name);
1795 if (module->version() != NULL) {
1796 module_version = module->version()->as_C_string();
1797 buf_len += (int)strlen(module_version);
1798 }
1799 }
1800
1801 // Allocate temporary buffer with extra space for formatting and line number
1802 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1803
1804 // Print stack trace line in buffer
1805 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
1806
1807 // Print module information
1808 if (module_name != NULL) {
1809 if (module_version != NULL) {
1810 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
1811 } else {
1812 sprintf(buf + (int)strlen(buf), "%s/", module_name);
1813 }
1814 }
1815
1816 // The method can be NULL if the requested class version is gone
1817 Method* method = holder->method_with_orig_idnum(method_id, version);
1818 if (!version_matches(method, version)) {
1819 strcat(buf, "Redefined)");
1820 } else {
1821 int line_number = Backtrace::get_line_number(method, bci);
1822 if (line_number == -2) {
1823 strcat(buf, "Native Method)");
1824 } else {
1825 if (source_file_name != NULL && (line_number != -1)) {
1826 // Sourcename and linenumber
1827 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
1828 } else if (source_file_name != NULL) {
1829 // Just sourcename
1830 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
1831 } else {
1832 // Neither sourcename nor linenumber
1833 sprintf(buf + (int)strlen(buf), "Unknown Source)");
1834 }
1835 CompiledMethod* nm = method->code();
1836 if (WizardMode && nm != NULL) {
1837 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1838 }
1839 }
1840 }
1841
1842 st->print_cr("%s", buf);
1843 }
1844
1845 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
1846 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
1847 int method_id = method->orig_method_idnum();
1848 int version = method->constants()->version();
1849 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
1850 }
1851
1852 /**
1853 * Print the throwable message and its stack trace plus all causes by walking the
1854 * cause chain. The output looks the same as of Throwable.printStackTrace().
1855 */
1856 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
1857 // First, print the message.
1858 print(throwable(), st);
1859 st->cr();
1860
1861 // Now print the stack trace.
1862 Thread* THREAD = Thread::current();
1863 while (throwable.not_null()) {
1864 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
1865 if (result.is_null()) {
1866 st->print_raw_cr("\t<<no stack trace available>>");
1867 return;
1868 }
1869 BacktraceIterator iter(result, THREAD);
1870
1871 while (iter.repeat()) {
1872 BacktraceElement bte = iter.next(THREAD);
1873 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
1874 }
1875 {
1876 // Call getCause() which doesn't necessarily return the _cause field.
1877 EXCEPTION_MARK;
1878 JavaValue cause(T_OBJECT);
1879 JavaCalls::call_virtual(&cause,
1880 throwable,
1881 throwable->klass(),
1882 vmSymbols::getCause_name(),
1883 vmSymbols::void_throwable_signature(),
1884 THREAD);
1885 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1886 if (HAS_PENDING_EXCEPTION) {
1887 CLEAR_PENDING_EXCEPTION;
1888 throwable = Handle();
1889 } else {
1890 throwable = Handle(THREAD, (oop) cause.get_jobject());
1891 if (throwable.not_null()) {
1892 st->print("Caused by: ");
1893 print(throwable(), st);
1894 st->cr();
1895 }
1896 }
1897 }
1898 }
1899 }
1900
1901 /**
1902 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
1903 */
1904 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
1905 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
1906 JavaValue result(T_VOID);
1907 JavaCalls::call_virtual(&result,
1908 throwable,
1909 SystemDictionary::Throwable_klass(),
1910 vmSymbols::printStackTrace_name(),
1911 vmSymbols::void_method_signature(),
1912 THREAD);
1913 }
1914
1915 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
1916 if (!StackTraceInThrowable) return;
1917 ResourceMark rm(THREAD);
1918
1919 // Start out by clearing the backtrace for this object, in case the VM
1920 // runs out of memory while allocating the stack trace
1921 set_backtrace(throwable(), NULL);
1922 // Clear lazily constructed Java level stacktrace if refilling occurs
1923 // This is unnecessary in 1.7+ but harmless
1924 clear_stacktrace(throwable());
1925
1926 int max_depth = MaxJavaStackTraceDepth;
1927 JavaThread* thread = (JavaThread*)THREAD;
1928
1929 BacktraceBuilder bt(CHECK);
1930
1931 // If there is no Java frame just return the method that was being called
1932 // with bci 0
1933 if (!thread->has_last_Java_frame()) {
1934 if (max_depth >= 1 && method() != NULL) {
1935 bt.push(method(), 0, CHECK);
1936 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
1937 set_depth(throwable(), 1);
1938 set_backtrace(throwable(), bt.backtrace());
1939 }
1940 return;
1941 }
1942
1943 // Instead of using vframe directly, this version of fill_in_stack_trace
1944 // basically handles everything by hand. This significantly improved the
1945 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1946 // See bug 6333838 for more details.
1947 // The "ASSERT" here is to verify this method generates the exactly same stack
1948 // trace as utilizing vframe.
1949 #ifdef ASSERT
1950 vframeStream st(thread);
1951 methodHandle st_method(THREAD, st.method());
1952 #endif
1953 int total_count = 0;
1954 RegisterMap map(thread, false);
1955 int decode_offset = 0;
1956 CompiledMethod* nm = NULL;
1957 bool skip_fillInStackTrace_check = false;
1958 bool skip_throwableInit_check = false;
1959 bool skip_hidden = !ShowHiddenFrames;
1960
1961 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1962 Method* method = NULL;
1963 int bci = 0;
1964
1965 // Compiled java method case.
1966 if (decode_offset != 0) {
1967 DebugInfoReadStream stream(nm, decode_offset);
1968 decode_offset = stream.read_int();
1969 method = (Method*)nm->metadata_at(stream.read_int());
1970 bci = stream.read_bci();
1971 } else {
1972 if (fr.is_first_frame()) break;
1973 address pc = fr.pc();
1974 if (fr.is_interpreted_frame()) {
1975 address bcp = fr.interpreter_frame_bcp();
1976 method = fr.interpreter_frame_method();
1977 bci = method->bci_from(bcp);
1978 fr = fr.sender(&map);
1979 } else {
1980 CodeBlob* cb = fr.cb();
1981 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1982 // but non nmethod
1983 fr = fr.sender(&map);
1984 if (cb == NULL || !cb->is_compiled()) {
1985 continue;
1986 }
1987 nm = cb->as_compiled_method();
1988 if (nm->method()->is_native()) {
1989 method = nm->method();
1990 bci = 0;
1991 } else {
1992 PcDesc* pd = nm->pc_desc_at(pc);
1993 decode_offset = pd->scope_decode_offset();
1994 // if decode_offset is not equal to 0, it will execute the
1995 // "compiled java method case" at the beginning of the loop.
1996 continue;
1997 }
1998 }
1999 }
2000 #ifdef ASSERT
2001 assert(st_method() == method && st.bci() == bci,
2002 "Wrong stack trace");
2003 st.next();
2004 // vframeStream::method isn't GC-safe so store off a copy
2005 // of the Method* in case we GC.
2006 if (!st.at_end()) {
2007 st_method = st.method();
2008 }
2009 #endif
2010
2011 // the format of the stacktrace will be:
2012 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2013 // - 0 or more <init> methods for the exception class (skipped)
2014 // - rest of the stack
2015
2016 if (!skip_fillInStackTrace_check) {
2017 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2018 throwable->is_a(method->method_holder())) {
2019 continue;
2020 }
2021 else {
2022 skip_fillInStackTrace_check = true; // gone past them all
2023 }
2024 }
2025 if (!skip_throwableInit_check) {
2026 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2027
2028 // skip <init> methods of the exception class and superclasses
2029 // This is simlar to classic VM.
2030 if (method->name() == vmSymbols::object_initializer_name() &&
2031 throwable->is_a(method->method_holder())) {
2032 continue;
2033 } else {
2034 // there are none or we've seen them all - either way stop checking
2035 skip_throwableInit_check = true;
2036 }
2037 }
2038 if (method->is_hidden()) {
2039 if (skip_hidden) continue;
2040 }
2041 bt.push(method, bci, CHECK);
2042 total_count++;
2043 }
2044
2045 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2046
2047 // Put completed stack trace into throwable object
2048 set_backtrace(throwable(), bt.backtrace());
2049 set_depth(throwable(), total_count);
2050 }
2051
2052 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2053 // No-op if stack trace is disabled
2054 if (!StackTraceInThrowable) {
2055 return;
2056 }
2057
2058 // Disable stack traces for some preallocated out of memory errors
2059 if (!Universe::should_fill_in_stack_trace(throwable)) {
2060 return;
2061 }
2062
2063 PRESERVE_EXCEPTION_MARK;
2064
2065 JavaThread* thread = JavaThread::active();
2066 fill_in_stack_trace(throwable, method, thread);
2067 // ignore exceptions thrown during stack trace filling
2068 CLEAR_PENDING_EXCEPTION;
2069 }
2070
2071 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2072 // Allocate stack trace - backtrace is created but not filled in
2073
2074 // No-op if stack trace is disabled
2075 if (!StackTraceInThrowable) return;
2076 BacktraceBuilder bt(CHECK); // creates a backtrace
2077 set_backtrace(throwable(), bt.backtrace());
2078 }
2079
2080
2081 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2082 // Fill in stack trace into preallocated backtrace (no GC)
2083
2084 // No-op if stack trace is disabled
2085 if (!StackTraceInThrowable) return;
2086
2087 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2088
2089 JavaThread* THREAD = JavaThread::current();
2090
2091 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2092 assert(backtrace.not_null(), "backtrace should have been preallocated");
2093
2094 ResourceMark rm(THREAD);
2095 vframeStream st(THREAD);
2096
2097 BacktraceBuilder bt(THREAD, backtrace);
2098
2099 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2100 // methods as preallocated errors aren't created by "java" code.
2101
2102 // fill in as much stack trace as possible
2103 int chunk_count = 0;
2104 for (;!st.at_end(); st.next()) {
2105 bt.push(st.method(), st.bci(), CHECK);
2106 chunk_count++;
2107
2108 // Bail-out for deep stacks
2109 if (chunk_count >= trace_chunk_size) break;
2110 }
2111 set_depth(throwable(), chunk_count);
2112 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2113
2114 // We support the Throwable immutability protocol defined for Java 7.
2115 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2116 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2117 }
2118
2119 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2120 objArrayHandle stack_trace_array_h, TRAPS) {
2121
2122 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2123 THROW(vmSymbols::java_lang_NullPointerException());
2124 }
2125
2126 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2127
2128 if (stack_trace_array_h->length() != depth(throwable())) {
2129 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2130 }
2131
2132 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2133 BacktraceIterator iter(result, THREAD);
2134
2135 int index = 0;
2136 while (iter.repeat()) {
2137 BacktraceElement bte = iter.next(THREAD);
2138
2139 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2140
2141 if (stack_trace_element.is_null()) {
2142 THROW(vmSymbols::java_lang_NullPointerException());
2143 }
2144
2145 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2146 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2147
2148 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2149 method,
2150 bte._version,
2151 bte._bci,
2152 bte._name, CHECK);
2153 }
2154 }
2155
2156 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2157 // Allocate java.lang.StackTraceElement instance
2158 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2159 assert(k != NULL, "must be loaded in 1.4+");
2160 if (k->should_be_initialized()) {
2161 k->initialize(CHECK_0);
2162 }
2163
2164 Handle element = k->allocate_instance_handle(CHECK_0);
2165
2166 int version = method->constants()->version();
2167 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2168 return element();
2169 }
2170
2171 void java_lang_StackTraceElement::fill_in(Handle element,
2172 InstanceKlass* holder, const methodHandle& method,
2173 int version, int bci, Symbol* name, TRAPS) {
2174 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2175
2176 // Fill in class name
2177 ResourceMark rm(THREAD);
2178 const char* str = holder->external_name();
2179 oop classname = StringTable::intern((char*) str, CHECK);
2180 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2181 java_lang_StackTraceElement::set_declaringClassObject(element(), holder->java_mirror());
2182
2183 oop loader = holder->class_loader();
2184 if (loader != NULL) {
2185 oop loader_name = java_lang_ClassLoader::name(loader);
2186 if (loader_name != NULL)
2187 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2188 }
2189
2190 // Fill in method name
2191 oop methodname = StringTable::intern(name, CHECK);
2192 java_lang_StackTraceElement::set_methodName(element(), methodname);
2193
2194 // Fill in module name and version
2195 ModuleEntry* module = holder->module();
2196 if (module->is_named()) {
2197 oop module_name = StringTable::intern(module->name(), CHECK);
2198 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2199 oop module_version;
2200 if (module->version() != NULL) {
2201 module_version = StringTable::intern(module->version(), CHECK);
2202 } else {
2203 module_version = NULL;
2204 }
2205 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2206 }
2207
2208 if (method() == NULL || !version_matches(method(), version)) {
2209 // The method was redefined, accurate line number information isn't available
2210 java_lang_StackTraceElement::set_fileName(element(), NULL);
2211 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2212 } else {
2213 // Fill in source file name and line number.
2214 Symbol* source = Backtrace::get_source_file_name(holder, version);
2215 if (ShowHiddenFrames && source == NULL)
2216 source = vmSymbols::unknown_class_name();
2217 oop filename = StringTable::intern(source, CHECK);
2218 java_lang_StackTraceElement::set_fileName(element(), filename);
2219
2220 int line_number = Backtrace::get_line_number(method, bci);
2221 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2222 }
2223 }
2224
2225 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2226 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2227 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2228 // we should expand MemberName::name when Throwable uses StackTrace
2229 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2230 return method;
2231 }
2232
2233 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2234 // set Method* or mid/cpref
2235 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2236 InstanceKlass* ik = method->method_holder();
2237 CallInfo info(method(), ik, CHECK);
2238 MethodHandles::init_method_MemberName(mname, info);
2239 // set bci
2240 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2241 // method may be redefined; store the version
2242 int version = method->constants()->version();
2243 assert((jushort)version == version, "version should be short");
2244 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2245 }
2246
2247 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2248 ResourceMark rm(THREAD);
2249 Handle k (THREAD, stackFrame->obj_field(_declaringClass_offset));
2250 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(k()));
2251 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2252
2253 short version = stackFrame->short_field(_version_offset);
2254 short bci = stackFrame->short_field(_bci_offset);
2255 Symbol* name = method->name();
2256 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK);
2257 }
2258
2259 void java_lang_StackFrameInfo::compute_offsets() {
2260 Klass* k = SystemDictionary::StackFrameInfo_klass();
2261 compute_offset(_declaringClass_offset, k, vmSymbols::declaringClass_name(), vmSymbols::class_signature());
2262 compute_offset(_memberName_offset, k, vmSymbols::memberName_name(), vmSymbols::object_signature());
2263 compute_offset(_bci_offset, k, vmSymbols::bci_name(), vmSymbols::short_signature());
2264 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2265 }
2266
2267 void java_lang_LiveStackFrameInfo::compute_offsets() {
2268 Klass* k = SystemDictionary::LiveStackFrameInfo_klass();
2269 compute_offset(_monitors_offset, k, vmSymbols::monitors_name(), vmSymbols::object_array_signature());
2270 compute_offset(_locals_offset, k, vmSymbols::locals_name(), vmSymbols::object_array_signature());
2271 compute_offset(_operands_offset, k, vmSymbols::operands_name(), vmSymbols::object_array_signature());
2272 compute_offset(_mode_offset, k, vmSymbols::mode_name(), vmSymbols::int_signature());
2273 }
2274
2275 void java_lang_reflect_AccessibleObject::compute_offsets() {
2276 Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
2277 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
2278 }
2279
2280 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2281 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2282 return (jboolean) reflect->bool_field(override_offset);
2283 }
2284
2285 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2286 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2287 reflect->bool_field_put(override_offset, (int) value);
2288 }
2289
2290 void java_lang_reflect_Method::compute_offsets() {
2291 Klass* k = SystemDictionary::reflect_Method_klass();
2292 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2293 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2294 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
2295 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2296 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2297 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2298 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2299 // The generic signature and annotations fields are only present in 1.5
2300 signature_offset = -1;
2301 annotations_offset = -1;
2302 parameter_annotations_offset = -1;
2303 annotation_default_offset = -1;
2304 type_annotations_offset = -1;
2305 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2306 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2307 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2308 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
2309 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2310 }
2311
2312 Handle java_lang_reflect_Method::create(TRAPS) {
2313 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2314 Klass* klass = SystemDictionary::reflect_Method_klass();
2315 // This class is eagerly initialized during VM initialization, since we keep a refence
2316 // to one of the methods
2317 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2318 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2319 }
2320
2321 oop java_lang_reflect_Method::clazz(oop reflect) {
2322 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2323 return reflect->obj_field(clazz_offset);
2324 }
2325
2326 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2327 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2328 reflect->obj_field_put(clazz_offset, value);
2329 }
2330
2331 int java_lang_reflect_Method::slot(oop reflect) {
2332 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2333 return reflect->int_field(slot_offset);
2334 }
2335
2336 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2337 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2338 reflect->int_field_put(slot_offset, value);
2339 }
2340
2341 oop java_lang_reflect_Method::name(oop method) {
2342 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2343 return method->obj_field(name_offset);
2344 }
2345
2346 void java_lang_reflect_Method::set_name(oop method, oop value) {
2347 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2348 method->obj_field_put(name_offset, value);
2349 }
2350
2351 oop java_lang_reflect_Method::return_type(oop method) {
2352 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2353 return method->obj_field(returnType_offset);
2354 }
2355
2356 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2357 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2358 method->obj_field_put(returnType_offset, value);
2359 }
2360
2361 oop java_lang_reflect_Method::parameter_types(oop method) {
2362 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2363 return method->obj_field(parameterTypes_offset);
2364 }
2365
2366 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2367 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2368 method->obj_field_put(parameterTypes_offset, value);
2369 }
2370
2371 oop java_lang_reflect_Method::exception_types(oop method) {
2372 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2373 return method->obj_field(exceptionTypes_offset);
2374 }
2375
2376 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2377 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2378 method->obj_field_put(exceptionTypes_offset, value);
2379 }
2380
2381 int java_lang_reflect_Method::modifiers(oop method) {
2382 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2383 return method->int_field(modifiers_offset);
2384 }
2385
2386 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2387 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2388 method->int_field_put(modifiers_offset, value);
2389 }
2390
2391 bool java_lang_reflect_Method::has_signature_field() {
2392 return (signature_offset >= 0);
2393 }
2394
2395 oop java_lang_reflect_Method::signature(oop method) {
2396 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2397 assert(has_signature_field(), "signature field must be present");
2398 return method->obj_field(signature_offset);
2399 }
2400
2401 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2402 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2403 assert(has_signature_field(), "signature field must be present");
2404 method->obj_field_put(signature_offset, value);
2405 }
2406
2407 bool java_lang_reflect_Method::has_annotations_field() {
2408 return (annotations_offset >= 0);
2409 }
2410
2411 oop java_lang_reflect_Method::annotations(oop method) {
2412 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2413 assert(has_annotations_field(), "annotations field must be present");
2414 return method->obj_field(annotations_offset);
2415 }
2416
2417 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2418 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2419 assert(has_annotations_field(), "annotations field must be present");
2420 method->obj_field_put(annotations_offset, value);
2421 }
2422
2423 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2424 return (parameter_annotations_offset >= 0);
2425 }
2426
2427 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2428 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2429 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2430 return method->obj_field(parameter_annotations_offset);
2431 }
2432
2433 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2434 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2435 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2436 method->obj_field_put(parameter_annotations_offset, value);
2437 }
2438
2439 bool java_lang_reflect_Method::has_annotation_default_field() {
2440 return (annotation_default_offset >= 0);
2441 }
2442
2443 oop java_lang_reflect_Method::annotation_default(oop method) {
2444 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2445 assert(has_annotation_default_field(), "annotation default field must be present");
2446 return method->obj_field(annotation_default_offset);
2447 }
2448
2449 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2450 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2451 assert(has_annotation_default_field(), "annotation default field must be present");
2452 method->obj_field_put(annotation_default_offset, value);
2453 }
2454
2455 bool java_lang_reflect_Method::has_type_annotations_field() {
2456 return (type_annotations_offset >= 0);
2457 }
2458
2459 oop java_lang_reflect_Method::type_annotations(oop method) {
2460 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2461 assert(has_type_annotations_field(), "type_annotations field must be present");
2462 return method->obj_field(type_annotations_offset);
2463 }
2464
2465 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2466 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2467 assert(has_type_annotations_field(), "type_annotations field must be present");
2468 method->obj_field_put(type_annotations_offset, value);
2469 }
2470
2471 void java_lang_reflect_Constructor::compute_offsets() {
2472 Klass* k = SystemDictionary::reflect_Constructor_klass();
2473 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2474 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2475 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2476 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2477 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2478 // The generic signature and annotations fields are only present in 1.5
2479 signature_offset = -1;
2480 annotations_offset = -1;
2481 parameter_annotations_offset = -1;
2482 type_annotations_offset = -1;
2483 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2484 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2485 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2486 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2487 }
2488
2489 Handle java_lang_reflect_Constructor::create(TRAPS) {
2490 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2491 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2492 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2493 InstanceKlass* ik = InstanceKlass::cast(k);
2494 // Ensure it is initialized
2495 ik->initialize(CHECK_NH);
2496 return ik->allocate_instance_handle(THREAD);
2497 }
2498
2499 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2500 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2501 return reflect->obj_field(clazz_offset);
2502 }
2503
2504 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2505 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2506 reflect->obj_field_put(clazz_offset, value);
2507 }
2508
2509 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2510 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2511 return constructor->obj_field(parameterTypes_offset);
2512 }
2513
2514 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2515 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2516 constructor->obj_field_put(parameterTypes_offset, value);
2517 }
2518
2519 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2520 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2521 return constructor->obj_field(exceptionTypes_offset);
2522 }
2523
2524 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2525 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2526 constructor->obj_field_put(exceptionTypes_offset, value);
2527 }
2528
2529 int java_lang_reflect_Constructor::slot(oop reflect) {
2530 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2531 return reflect->int_field(slot_offset);
2532 }
2533
2534 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2535 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2536 reflect->int_field_put(slot_offset, value);
2537 }
2538
2539 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2540 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2541 return constructor->int_field(modifiers_offset);
2542 }
2543
2544 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2545 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2546 constructor->int_field_put(modifiers_offset, value);
2547 }
2548
2549 bool java_lang_reflect_Constructor::has_signature_field() {
2550 return (signature_offset >= 0);
2551 }
2552
2553 oop java_lang_reflect_Constructor::signature(oop constructor) {
2554 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2555 assert(has_signature_field(), "signature field must be present");
2556 return constructor->obj_field(signature_offset);
2557 }
2558
2559 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2560 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2561 assert(has_signature_field(), "signature field must be present");
2562 constructor->obj_field_put(signature_offset, value);
2563 }
2564
2565 bool java_lang_reflect_Constructor::has_annotations_field() {
2566 return (annotations_offset >= 0);
2567 }
2568
2569 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2570 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2571 assert(has_annotations_field(), "annotations field must be present");
2572 return constructor->obj_field(annotations_offset);
2573 }
2574
2575 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2576 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2577 assert(has_annotations_field(), "annotations field must be present");
2578 constructor->obj_field_put(annotations_offset, value);
2579 }
2580
2581 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2582 return (parameter_annotations_offset >= 0);
2583 }
2584
2585 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2586 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2587 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2588 return method->obj_field(parameter_annotations_offset);
2589 }
2590
2591 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2592 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2593 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2594 method->obj_field_put(parameter_annotations_offset, value);
2595 }
2596
2597 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2598 return (type_annotations_offset >= 0);
2599 }
2600
2601 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2602 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2603 assert(has_type_annotations_field(), "type_annotations field must be present");
2604 return constructor->obj_field(type_annotations_offset);
2605 }
2606
2607 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2608 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2609 assert(has_type_annotations_field(), "type_annotations field must be present");
2610 constructor->obj_field_put(type_annotations_offset, value);
2611 }
2612
2613 void java_lang_reflect_Field::compute_offsets() {
2614 Klass* k = SystemDictionary::reflect_Field_klass();
2615 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2616 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2617 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
2618 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2619 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2620 // The generic signature and annotations fields are only present in 1.5
2621 signature_offset = -1;
2622 annotations_offset = -1;
2623 type_annotations_offset = -1;
2624 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2625 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2626 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2627 }
2628
2629 Handle java_lang_reflect_Field::create(TRAPS) {
2630 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2631 Symbol* name = vmSymbols::java_lang_reflect_Field();
2632 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2633 InstanceKlass* ik = InstanceKlass::cast(k);
2634 // Ensure it is initialized
2635 ik->initialize(CHECK_NH);
2636 return ik->allocate_instance_handle(THREAD);
2637 }
2638
2639 oop java_lang_reflect_Field::clazz(oop reflect) {
2640 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2641 return reflect->obj_field(clazz_offset);
2642 }
2643
2644 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2645 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2646 reflect->obj_field_put(clazz_offset, value);
2647 }
2648
2649 oop java_lang_reflect_Field::name(oop field) {
2650 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2651 return field->obj_field(name_offset);
2652 }
2653
2654 void java_lang_reflect_Field::set_name(oop field, oop value) {
2655 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2656 field->obj_field_put(name_offset, value);
2657 }
2658
2659 oop java_lang_reflect_Field::type(oop field) {
2660 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2661 return field->obj_field(type_offset);
2662 }
2663
2664 void java_lang_reflect_Field::set_type(oop field, oop value) {
2665 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2666 field->obj_field_put(type_offset, value);
2667 }
2668
2669 int java_lang_reflect_Field::slot(oop reflect) {
2670 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2671 return reflect->int_field(slot_offset);
2672 }
2673
2674 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2675 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2676 reflect->int_field_put(slot_offset, value);
2677 }
2678
2679 int java_lang_reflect_Field::modifiers(oop field) {
2680 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2681 return field->int_field(modifiers_offset);
2682 }
2683
2684 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2685 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2686 field->int_field_put(modifiers_offset, value);
2687 }
2688
2689 bool java_lang_reflect_Field::has_signature_field() {
2690 return (signature_offset >= 0);
2691 }
2692
2693 oop java_lang_reflect_Field::signature(oop field) {
2694 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2695 assert(has_signature_field(), "signature field must be present");
2696 return field->obj_field(signature_offset);
2697 }
2698
2699 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2700 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2701 assert(has_signature_field(), "signature field must be present");
2702 field->obj_field_put(signature_offset, value);
2703 }
2704
2705 bool java_lang_reflect_Field::has_annotations_field() {
2706 return (annotations_offset >= 0);
2707 }
2708
2709 oop java_lang_reflect_Field::annotations(oop field) {
2710 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2711 assert(has_annotations_field(), "annotations field must be present");
2712 return field->obj_field(annotations_offset);
2713 }
2714
2715 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2716 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2717 assert(has_annotations_field(), "annotations field must be present");
2718 field->obj_field_put(annotations_offset, value);
2719 }
2720
2721 bool java_lang_reflect_Field::has_type_annotations_field() {
2722 return (type_annotations_offset >= 0);
2723 }
2724
2725 oop java_lang_reflect_Field::type_annotations(oop field) {
2726 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2727 assert(has_type_annotations_field(), "type_annotations field must be present");
2728 return field->obj_field(type_annotations_offset);
2729 }
2730
2731 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2732 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2733 assert(has_type_annotations_field(), "type_annotations field must be present");
2734 field->obj_field_put(type_annotations_offset, value);
2735 }
2736
2737 void reflect_ConstantPool::compute_offsets() {
2738 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2739 // This null test can be removed post beta
2740 if (k != NULL) {
2741 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2742 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2743 }
2744 }
2745
2746 void java_lang_reflect_Parameter::compute_offsets() {
2747 Klass* k = SystemDictionary::reflect_Parameter_klass();
2748 if(NULL != k) {
2749 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2750 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2751 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature());
2752 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature());
2753 }
2754 }
2755
2756 Handle java_lang_reflect_Parameter::create(TRAPS) {
2757 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2758 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2759 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2760 InstanceKlass* ik = InstanceKlass::cast(k);
2761 // Ensure it is initialized
2762 ik->initialize(CHECK_NH);
2763 return ik->allocate_instance_handle(THREAD);
2764 }
2765
2766 oop java_lang_reflect_Parameter::name(oop param) {
2767 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2768 return param->obj_field(name_offset);
2769 }
2770
2771 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2772 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2773 param->obj_field_put(name_offset, value);
2774 }
2775
2776 int java_lang_reflect_Parameter::modifiers(oop param) {
2777 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2778 return param->int_field(modifiers_offset);
2779 }
2780
2781 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2782 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2783 param->int_field_put(modifiers_offset, value);
2784 }
2785
2786 int java_lang_reflect_Parameter::index(oop param) {
2787 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2788 return param->int_field(index_offset);
2789 }
2790
2791 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2792 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2793 param->int_field_put(index_offset, value);
2794 }
2795
2796 oop java_lang_reflect_Parameter::executable(oop param) {
2797 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2798 return param->obj_field(executable_offset);
2799 }
2800
2801 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2802 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2803 param->obj_field_put(executable_offset, value);
2804 }
2805
2806
2807 int java_lang_Module::loader_offset;
2808 int java_lang_Module::name_offset;
2809 int java_lang_Module::_module_entry_offset = -1;
2810
2811 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
2812 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2813
2814 Symbol* name = vmSymbols::java_lang_Module();
2815 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2816 InstanceKlass* ik = InstanceKlass::cast(k);
2817 Handle jlmh = ik->allocate_instance_handle(CHECK_NH);
2818 JavaValue result(T_VOID);
2819 JavaCalls::call_special(&result, jlmh, ik,
2820 vmSymbols::object_initializer_name(),
2821 vmSymbols::java_lang_module_init_signature(),
2822 loader, module_name, CHECK_NH);
2823 return jlmh;
2824 }
2825
2826 void java_lang_Module::compute_offsets() {
2827 Klass* k = SystemDictionary::Module_klass();
2828 if(NULL != k) {
2829 compute_offset(loader_offset, k, vmSymbols::loader_name(), vmSymbols::classloader_signature());
2830 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2831 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2832 }
2833 }
2834
2835
2836 oop java_lang_Module::loader(oop module) {
2837 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2838 return module->obj_field(loader_offset);
2839 }
2840
2841 void java_lang_Module::set_loader(oop module, oop value) {
2842 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2843 module->obj_field_put(loader_offset, value);
2844 }
2845
2846 oop java_lang_Module::name(oop module) {
2847 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2848 return module->obj_field(name_offset);
2849 }
2850
2851 void java_lang_Module::set_name(oop module, oop value) {
2852 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2853 module->obj_field_put(name_offset, value);
2854 }
2855
2856 ModuleEntry* java_lang_Module::module_entry(oop module, TRAPS) {
2857 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
2858 assert(module != NULL, "module can't be null");
2859 assert(module->is_oop(), "module must be oop");
2860
2861 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
2862 if (module_entry == NULL) {
2863 // If the inject field containing the ModuleEntry* is null then return the
2864 // class loader's unnamed module.
2865 oop loader = java_lang_Module::loader(module);
2866 Handle h_loader = Handle(THREAD, loader);
2867 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader, CHECK_NULL);
2868 return loader_cld->unnamed_module();
2869 }
2870 return module_entry;
2871 }
2872
2873 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
2874 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
2875 assert(module != NULL, "module can't be null");
2876 assert(module->is_oop(), "module must be oop");
2877 module->address_field_put(_module_entry_offset, (address)module_entry);
2878 }
2879
2880 Handle reflect_ConstantPool::create(TRAPS) {
2881 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2882 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
2883 // Ensure it is initialized
2884 k->initialize(CHECK_NH);
2885 return k->allocate_instance_handle(THREAD);
2886 }
2887
2888
2889 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2890 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2891 oop mirror = value->pool_holder()->java_mirror();
2892 // Save the mirror to get back the constant pool.
2893 reflect->obj_field_put(_oop_offset, mirror);
2894 }
2895
2896 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
2897 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2898
2899 oop mirror = reflect->obj_field(_oop_offset);
2900 Klass* k = java_lang_Class::as_Klass(mirror);
2901 assert(k->is_instance_klass(), "Must be");
2902
2903 // Get the constant pool back from the klass. Since class redefinition
2904 // merges the new constant pool into the old, this is essentially the
2905 // same constant pool as the original. If constant pool merging is
2906 // no longer done in the future, this will have to change to save
2907 // the original.
2908 return InstanceKlass::cast(k)->constants();
2909 }
2910
2911 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2912 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2913 // This null test can be removed post beta
2914 if (k != NULL) {
2915 compute_offset(_base_offset, k,
2916 vmSymbols::base_name(), vmSymbols::object_signature());
2917 }
2918 }
2919
2920 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2921 Klass* k = SystemDictionary::box_klass(type);
2922 if (k == NULL) return NULL;
2923 InstanceKlass* ik = InstanceKlass::cast(k);
2924 if (!ik->is_initialized()) ik->initialize(CHECK_0);
2925 return ik->allocate_instance(THREAD);
2926 }
2927
2928
2929 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2930 oop box = initialize_and_allocate(type, CHECK_0);
2931 if (box == NULL) return NULL;
2932 switch (type) {
2933 case T_BOOLEAN:
2934 box->bool_field_put(value_offset, value->z);
2935 break;
2936 case T_CHAR:
2937 box->char_field_put(value_offset, value->c);
2938 break;
2939 case T_FLOAT:
2940 box->float_field_put(value_offset, value->f);
2941 break;
2942 case T_DOUBLE:
2943 box->double_field_put(long_value_offset, value->d);
2944 break;
2945 case T_BYTE:
2946 box->byte_field_put(value_offset, value->b);
2947 break;
2948 case T_SHORT:
2949 box->short_field_put(value_offset, value->s);
2950 break;
2951 case T_INT:
2952 box->int_field_put(value_offset, value->i);
2953 break;
2954 case T_LONG:
2955 box->long_field_put(long_value_offset, value->j);
2956 break;
2957 default:
2958 return NULL;
2959 }
2960 return box;
2961 }
2962
2963
2964 BasicType java_lang_boxing_object::basic_type(oop box) {
2965 if (box == NULL) return T_ILLEGAL;
2966 BasicType type = SystemDictionary::box_klass_type(box->klass());
2967 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2968 return T_ILLEGAL;
2969 return type;
2970 }
2971
2972
2973 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2974 BasicType type = SystemDictionary::box_klass_type(box->klass());
2975 switch (type) {
2976 case T_BOOLEAN:
2977 value->z = box->bool_field(value_offset);
2978 break;
2979 case T_CHAR:
2980 value->c = box->char_field(value_offset);
2981 break;
2982 case T_FLOAT:
2983 value->f = box->float_field(value_offset);
2984 break;
2985 case T_DOUBLE:
2986 value->d = box->double_field(long_value_offset);
2987 break;
2988 case T_BYTE:
2989 value->b = box->byte_field(value_offset);
2990 break;
2991 case T_SHORT:
2992 value->s = box->short_field(value_offset);
2993 break;
2994 case T_INT:
2995 value->i = box->int_field(value_offset);
2996 break;
2997 case T_LONG:
2998 value->j = box->long_field(long_value_offset);
2999 break;
3000 default:
3001 return T_ILLEGAL;
3002 } // end switch
3003 return type;
3004 }
3005
3006
3007 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3008 BasicType type = SystemDictionary::box_klass_type(box->klass());
3009 switch (type) {
3010 case T_BOOLEAN:
3011 box->bool_field_put(value_offset, value->z);
3012 break;
3013 case T_CHAR:
3014 box->char_field_put(value_offset, value->c);
3015 break;
3016 case T_FLOAT:
3017 box->float_field_put(value_offset, value->f);
3018 break;
3019 case T_DOUBLE:
3020 box->double_field_put(long_value_offset, value->d);
3021 break;
3022 case T_BYTE:
3023 box->byte_field_put(value_offset, value->b);
3024 break;
3025 case T_SHORT:
3026 box->short_field_put(value_offset, value->s);
3027 break;
3028 case T_INT:
3029 box->int_field_put(value_offset, value->i);
3030 break;
3031 case T_LONG:
3032 box->long_field_put(long_value_offset, value->j);
3033 break;
3034 default:
3035 return T_ILLEGAL;
3036 } // end switch
3037 return type;
3038 }
3039
3040
3041 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3042 switch (type) {
3043 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3044 case T_CHAR: st->print("%d", value->c); break;
3045 case T_BYTE: st->print("%d", value->b); break;
3046 case T_SHORT: st->print("%d", value->s); break;
3047 case T_INT: st->print("%d", value->i); break;
3048 case T_LONG: st->print(INT64_FORMAT, value->j); break;
3049 case T_FLOAT: st->print("%f", value->f); break;
3050 case T_DOUBLE: st->print("%lf", value->d); break;
3051 default: st->print("type %d?", type); break;
3052 }
3053 }
3054
3055 // Support for java_lang_ref_SoftReference
3056
3057 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3058 return ref->long_field(timestamp_offset);
3059 }
3060
3061 jlong java_lang_ref_SoftReference::clock() {
3062 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3063 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
3064 return *offset;
3065 }
3066
3067 void java_lang_ref_SoftReference::set_clock(jlong value) {
3068 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3069 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
3070 *offset = value;
3071 }
3072
3073 // Support for java_lang_invoke_DirectMethodHandle
3074
3075 int java_lang_invoke_DirectMethodHandle::_member_offset;
3076
3077 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3078 oop member_name = NULL;
3079 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
3080 assert(is_dmh, "a DirectMethodHandle oop is expected");
3081 if (is_dmh) {
3082 member_name = dmh->obj_field(member_offset_in_bytes());
3083 }
3084 return member_name;
3085 }
3086
3087 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3088 Klass* k = SystemDictionary::DirectMethodHandle_klass();
3089 if (k != NULL) {
3090 compute_offset(_member_offset, k, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
3091 }
3092 }
3093
3094 // Support for java_lang_invoke_MethodHandle
3095
3096 int java_lang_invoke_MethodHandle::_type_offset;
3097 int java_lang_invoke_MethodHandle::_form_offset;
3098
3099 int java_lang_invoke_MemberName::_clazz_offset;
3100 int java_lang_invoke_MemberName::_name_offset;
3101 int java_lang_invoke_MemberName::_type_offset;
3102 int java_lang_invoke_MemberName::_flags_offset;
3103 int java_lang_invoke_MemberName::_method_offset;
3104 int java_lang_invoke_MemberName::_vmindex_offset;
3105
3106 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3107 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3108
3109 int java_lang_invoke_LambdaForm::_vmentry_offset;
3110
3111 void java_lang_invoke_MethodHandle::compute_offsets() {
3112 Klass* k = SystemDictionary::MethodHandle_klass();
3113 if (k != NULL) {
3114 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
3115 compute_offset(_form_offset, k, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
3116 }
3117 }
3118
3119 void java_lang_invoke_MemberName::compute_offsets() {
3120 Klass* k = SystemDictionary::MemberName_klass();
3121 assert (k != NULL, "jdk mismatch");
3122 compute_offset(_clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
3123 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
3124 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::object_signature());
3125 compute_offset(_flags_offset, k, vmSymbols::flags_name(), vmSymbols::int_signature());
3126 compute_offset(_method_offset, k, vmSymbols::method_name(), vmSymbols::java_lang_invoke_ResolvedMethodName_signature());
3127 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3128 }
3129
3130 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3131 Klass* k = SystemDictionary::ResolvedMethodName_klass();
3132 assert(k != NULL, "jdk mismatch");
3133 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3134 }
3135
3136 void java_lang_invoke_LambdaForm::compute_offsets() {
3137 Klass* k = SystemDictionary::LambdaForm_klass();
3138 assert (k != NULL, "jdk mismatch");
3139 compute_offset(_vmentry_offset, k, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
3140 }
3141
3142 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3143 return obj != NULL && is_subclass(obj->klass());
3144 }
3145
3146
3147 oop java_lang_invoke_MethodHandle::type(oop mh) {
3148 return mh->obj_field(_type_offset);
3149 }
3150
3151 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3152 mh->obj_field_put(_type_offset, mtype);
3153 }
3154
3155 oop java_lang_invoke_MethodHandle::form(oop mh) {
3156 assert(_form_offset != 0, "");
3157 return mh->obj_field(_form_offset);
3158 }
3159
3160 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3161 assert(_form_offset != 0, "");
3162 mh->obj_field_put(_form_offset, lform);
3163 }
3164
3165 /// MemberName accessors
3166
3167 oop java_lang_invoke_MemberName::clazz(oop mname) {
3168 assert(is_instance(mname), "wrong type");
3169 return mname->obj_field(_clazz_offset);
3170 }
3171
3172 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3173 assert(is_instance(mname), "wrong type");
3174 mname->obj_field_put(_clazz_offset, clazz);
3175 }
3176
3177 oop java_lang_invoke_MemberName::name(oop mname) {
3178 assert(is_instance(mname), "wrong type");
3179 return mname->obj_field(_name_offset);
3180 }
3181
3182 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3183 assert(is_instance(mname), "wrong type");
3184 mname->obj_field_put(_name_offset, name);
3185 }
3186
3187 oop java_lang_invoke_MemberName::type(oop mname) {
3188 assert(is_instance(mname), "wrong type");
3189 return mname->obj_field(_type_offset);
3190 }
3191
3192 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3193 assert(is_instance(mname), "wrong type");
3194 mname->obj_field_put(_type_offset, type);
3195 }
3196
3197 int java_lang_invoke_MemberName::flags(oop mname) {
3198 assert(is_instance(mname), "wrong type");
3199 return mname->int_field(_flags_offset);
3200 }
3201
3202 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3203 assert(is_instance(mname), "wrong type");
3204 mname->int_field_put(_flags_offset, flags);
3205 }
3206
3207
3208 // Return vmtarget from ResolvedMethodName method field through indirection
3209 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
3210 assert(is_instance(mname), "wrong type");
3211 oop method = mname->obj_field(_method_offset);
3212 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method);
3213 }
3214
3215 bool java_lang_invoke_MemberName::is_method(oop mname) {
3216 assert(is_instance(mname), "must be MemberName");
3217 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3218 }
3219
3220 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
3221 assert(is_instance(mname), "wrong type");
3222 mname->obj_field_put(_method_offset, resolved_method);
3223 }
3224
3225 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3226 assert(is_instance(mname), "wrong type");
3227 return (intptr_t) mname->address_field(_vmindex_offset);
3228 }
3229
3230 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3231 assert(is_instance(mname), "wrong type");
3232 mname->address_field_put(_vmindex_offset, (address) index);
3233 }
3234
3235
3236 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
3237 assert(is_instance(resolved_method), "wrong type");
3238 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
3239 assert(m->is_method(), "must be");
3240 return m;
3241 }
3242
3243 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
3244 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
3245 assert(is_instance(resolved_method), "wrong type");
3246 resolved_method->address_field_put(_vmtarget_offset, (address)m);
3247 }
3248
3249 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
3250 // lookup ResolvedMethod oop in the table, or create a new one and intern it
3251 oop resolved_method = ResolvedMethodTable::find_method(m());
3252 if (resolved_method == NULL) {
3253 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3254 if (!k->is_initialized()) {
3255 k->initialize(CHECK_NULL);
3256 }
3257 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
3258 new_resolved_method->address_field_put(_vmtarget_offset, (address)m());
3259 // Add a reference to the loader (actually mirror because anonymous classes will not have
3260 // distinct loaders) to ensure the metadata is kept alive.
3261 // This mirror may be different than the one in clazz field.
3262 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror());
3263 resolved_method = ResolvedMethodTable::add_method(Handle(THREAD, new_resolved_method));
3264 }
3265 return resolved_method;
3266 }
3267
3268 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3269 assert(is_instance(lform), "wrong type");
3270 return lform->obj_field(_vmentry_offset);
3271 }
3272
3273
3274 // Support for java_lang_invoke_MethodType
3275
3276 int java_lang_invoke_MethodType::_rtype_offset;
3277 int java_lang_invoke_MethodType::_ptypes_offset;
3278
3279 void java_lang_invoke_MethodType::compute_offsets() {
3280 Klass* k = SystemDictionary::MethodType_klass();
3281 if (k != NULL) {
3282 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
3283 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
3284 }
3285 }
3286
3287 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3288 st->print("(");
3289 objArrayOop pts = ptypes(mt);
3290 for (int i = 0, limit = pts->length(); i < limit; i++) {
3291 java_lang_Class::print_signature(pts->obj_at(i), st);
3292 }
3293 st->print(")");
3294 java_lang_Class::print_signature(rtype(mt), st);
3295 }
3296
3297 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
3298 ResourceMark rm;
3299 stringStream buffer(128);
3300 print_signature(mt, &buffer);
3301 const char* sigstr = buffer.base();
3302 int siglen = (int) buffer.size();
3303 Symbol *name;
3304 if (!intern_if_not_found) {
3305 name = SymbolTable::probe(sigstr, siglen);
3306 } else {
3307 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
3308 }
3309 return name;
3310 }
3311
3312 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3313 if (mt1 == mt2)
3314 return true;
3315 if (rtype(mt1) != rtype(mt2))
3316 return false;
3317 if (ptype_count(mt1) != ptype_count(mt2))
3318 return false;
3319 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3320 if (ptype(mt1, i) != ptype(mt2, i))
3321 return false;
3322 }
3323 return true;
3324 }
3325
3326 oop java_lang_invoke_MethodType::rtype(oop mt) {
3327 assert(is_instance(mt), "must be a MethodType");
3328 return mt->obj_field(_rtype_offset);
3329 }
3330
3331 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3332 assert(is_instance(mt), "must be a MethodType");
3333 return (objArrayOop) mt->obj_field(_ptypes_offset);
3334 }
3335
3336 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3337 return ptypes(mt)->obj_at(idx);
3338 }
3339
3340 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3341 return ptypes(mt)->length();
3342 }
3343
3344 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3345 objArrayOop pts = ptypes(mt);
3346 int count = pts->length();
3347 int slots = 0;
3348 for (int i = 0; i < count; i++) {
3349 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3350 slots += type2size[bt];
3351 }
3352 return slots;
3353 }
3354
3355 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3356 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3357 return type2size[bt];
3358 }
3359
3360
3361 // Support for java_lang_invoke_CallSite
3362
3363 int java_lang_invoke_CallSite::_target_offset;
3364 int java_lang_invoke_CallSite::_context_offset;
3365
3366 void java_lang_invoke_CallSite::compute_offsets() {
3367 Klass* k = SystemDictionary::CallSite_klass();
3368 if (k != NULL) {
3369 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
3370 compute_offset(_context_offset, k, vmSymbols::context_name(),
3371 vmSymbols::java_lang_invoke_MethodHandleNatives_CallSiteContext_signature());
3372 }
3373 }
3374
3375 oop java_lang_invoke_CallSite::context(oop call_site) {
3376 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3377
3378 oop dep_oop = call_site->obj_field(_context_offset);
3379 return dep_oop;
3380 }
3381
3382 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3383
3384 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3385
3386 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3387 Klass* k = SystemDictionary::Context_klass();
3388 if (k != NULL) {
3389 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3390 }
3391 }
3392
3393 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3394 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3395 intptr_t* vmdeps_addr = (intptr_t*)call_site->address_field_addr(_vmdependencies_offset);
3396 DependencyContext dep_ctx(vmdeps_addr);
3397 return dep_ctx;
3398 }
3399
3400 // Support for java_security_AccessControlContext
3401
3402 int java_security_AccessControlContext::_context_offset = 0;
3403 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3404 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3405 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3406
3407 void java_security_AccessControlContext::compute_offsets() {
3408 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3409 fieldDescriptor fd;
3410 InstanceKlass* ik = SystemDictionary::AccessControlContext_klass();
3411
3412 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
3413 fatal("Invalid layout of java.security.AccessControlContext");
3414 }
3415 _context_offset = fd.offset();
3416
3417 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
3418 fatal("Invalid layout of java.security.AccessControlContext");
3419 }
3420 _privilegedContext_offset = fd.offset();
3421
3422 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
3423 fatal("Invalid layout of java.security.AccessControlContext");
3424 }
3425 _isPrivileged_offset = fd.offset();
3426
3427 // The offset may not be present for bootstrapping with older JDK.
3428 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
3429 _isAuthorized_offset = fd.offset();
3430 }
3431 }
3432
3433
3434 bool java_security_AccessControlContext::is_authorized(Handle context) {
3435 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
3436 assert(_isAuthorized_offset != -1, "should be set");
3437 return context->bool_field(_isAuthorized_offset) != 0;
3438 }
3439
3440 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3441 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3442 // Ensure klass is initialized
3443 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3444 // Allocate result
3445 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3446 // Fill in values
3447 result->obj_field_put(_context_offset, context());
3448 result->obj_field_put(_privilegedContext_offset, privileged_context());
3449 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3450 // whitelist AccessControlContexts created by the JVM if present
3451 if (_isAuthorized_offset != -1) {
3452 result->bool_field_put(_isAuthorized_offset, true);
3453 }
3454 return result;
3455 }
3456
3457
3458 // Support for java_lang_ClassLoader
3459
3460 bool java_lang_ClassLoader::offsets_computed = false;
3461 int java_lang_ClassLoader::_loader_data_offset = -1;
3462 int java_lang_ClassLoader::parallelCapable_offset = -1;
3463 int java_lang_ClassLoader::name_offset = -1;
3464 int java_lang_ClassLoader::unnamedModule_offset = -1;
3465
3466 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
3467 assert(loader != NULL && loader->is_oop(), "loader must be oop");
3468 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
3469 }
3470
3471 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
3472 return *java_lang_ClassLoader::loader_data_addr(loader);
3473 }
3474
3475 void java_lang_ClassLoader::compute_offsets() {
3476 assert(!offsets_computed, "offsets should be initialized only once");
3477 offsets_computed = true;
3478
3479 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
3480 Klass* k1 = SystemDictionary::ClassLoader_klass();
3481 compute_optional_offset(parallelCapable_offset,
3482 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
3483
3484 compute_offset(name_offset,
3485 k1, vmSymbols::name_name(), vmSymbols::string_signature());
3486
3487 compute_offset(unnamedModule_offset,
3488 k1, vmSymbols::unnamedModule_name(), vmSymbols::module_signature());
3489
3490 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3491 }
3492
3493 oop java_lang_ClassLoader::parent(oop loader) {
3494 assert(is_instance(loader), "loader must be oop");
3495 return loader->obj_field(parent_offset);
3496 }
3497
3498 oop java_lang_ClassLoader::name(oop loader) {
3499 assert(is_instance(loader), "loader must be oop");
3500 return loader->obj_field(name_offset);
3501 }
3502
3503 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3504 assert(is_instance(loader), "loader must be oop");
3505 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3506 oop acl = loader;
3507 debug_only(jint loop_count = 0);
3508 // This loop taken verbatim from ClassLoader.java:
3509 do {
3510 acl = parent(acl);
3511 if (cl == acl) {
3512 return true;
3513 }
3514 assert(++loop_count > 0, "loop_count overflow");
3515 } while (acl != NULL);
3516 return false;
3517 }
3518
3519 bool java_lang_ClassLoader::is_instance(oop obj) {
3520 return obj != NULL && is_subclass(obj->klass());
3521 }
3522
3523
3524 // For class loader classes, parallelCapable defined
3525 // based on non-null field
3526 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3527 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3528 if (parallelCapable_offset == -1) {
3529 // Default for backward compatibility is false
3530 return false;
3531 }
3532 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3533 }
3534
3535 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3536 // Fix for 4474172; see evaluation for more details
3537 loader = non_reflection_class_loader(loader);
3538
3539 oop cl = SystemDictionary::java_system_loader();
3540 while(cl != NULL) {
3541 if (cl == loader) return true;
3542 cl = parent(cl);
3543 }
3544 return false;
3545 }
3546
3547 // Return true if this is one of the class loaders associated with
3548 // the generated bytecodes for reflection.
3549 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
3550 if (loader != NULL) {
3551 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3552 // This might be null in non-1.4 JDKs
3553 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
3554 }
3555 return false;
3556 }
3557
3558 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3559 // See whether this is one of the class loaders associated with
3560 // the generated bytecodes for reflection, and if so, "magically"
3561 // delegate to its parent to prevent class loading from occurring
3562 // in places where applications using reflection didn't expect it.
3563 if (is_reflection_class_loader(loader)) {
3564 return parent(loader);
3565 }
3566 return loader;
3567 }
3568
3569 oop java_lang_ClassLoader::unnamedModule(oop loader) {
3570 assert(is_instance(loader), "loader must be oop");
3571 return loader->obj_field(unnamedModule_offset);
3572 }
3573
3574 // Support for java_lang_System
3575 int java_lang_System::in_offset_in_bytes() {
3576 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3577 }
3578
3579
3580 int java_lang_System::out_offset_in_bytes() {
3581 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3582 }
3583
3584
3585 int java_lang_System::err_offset_in_bytes() {
3586 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3587 }
3588
3589
3590 bool java_lang_System::has_security_manager() {
3591 InstanceKlass* ik = SystemDictionary::System_klass();
3592 address addr = ik->static_field_addr(static_security_offset);
3593 if (UseCompressedOops) {
3594 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3595 } else {
3596 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3597 }
3598 }
3599
3600 int java_lang_Class::_klass_offset;
3601 int java_lang_Class::_array_klass_offset;
3602 int java_lang_Class::_oop_size_offset;
3603 int java_lang_Class::_static_oop_field_count_offset;
3604 int java_lang_Class::_class_loader_offset;
3605 int java_lang_Class::_module_offset;
3606 int java_lang_Class::_protection_domain_offset;
3607 int java_lang_Class::_component_mirror_offset;
3608 int java_lang_Class::_init_lock_offset;
3609 int java_lang_Class::_signers_offset;
3610 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3611 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
3612 int java_lang_Throwable::backtrace_offset;
3613 int java_lang_Throwable::detailMessage_offset;
3614 int java_lang_Throwable::stackTrace_offset;
3615 int java_lang_Throwable::depth_offset;
3616 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3617 int java_lang_reflect_AccessibleObject::override_offset;
3618 int java_lang_reflect_Method::clazz_offset;
3619 int java_lang_reflect_Method::name_offset;
3620 int java_lang_reflect_Method::returnType_offset;
3621 int java_lang_reflect_Method::parameterTypes_offset;
3622 int java_lang_reflect_Method::exceptionTypes_offset;
3623 int java_lang_reflect_Method::slot_offset;
3624 int java_lang_reflect_Method::modifiers_offset;
3625 int java_lang_reflect_Method::signature_offset;
3626 int java_lang_reflect_Method::annotations_offset;
3627 int java_lang_reflect_Method::parameter_annotations_offset;
3628 int java_lang_reflect_Method::annotation_default_offset;
3629 int java_lang_reflect_Method::type_annotations_offset;
3630 int java_lang_reflect_Constructor::clazz_offset;
3631 int java_lang_reflect_Constructor::parameterTypes_offset;
3632 int java_lang_reflect_Constructor::exceptionTypes_offset;
3633 int java_lang_reflect_Constructor::slot_offset;
3634 int java_lang_reflect_Constructor::modifiers_offset;
3635 int java_lang_reflect_Constructor::signature_offset;
3636 int java_lang_reflect_Constructor::annotations_offset;
3637 int java_lang_reflect_Constructor::parameter_annotations_offset;
3638 int java_lang_reflect_Constructor::type_annotations_offset;
3639 int java_lang_reflect_Field::clazz_offset;
3640 int java_lang_reflect_Field::name_offset;
3641 int java_lang_reflect_Field::type_offset;
3642 int java_lang_reflect_Field::slot_offset;
3643 int java_lang_reflect_Field::modifiers_offset;
3644 int java_lang_reflect_Field::signature_offset;
3645 int java_lang_reflect_Field::annotations_offset;
3646 int java_lang_reflect_Field::type_annotations_offset;
3647 int java_lang_reflect_Parameter::name_offset;
3648 int java_lang_reflect_Parameter::modifiers_offset;
3649 int java_lang_reflect_Parameter::index_offset;
3650 int java_lang_reflect_Parameter::executable_offset;
3651 int java_lang_boxing_object::value_offset;
3652 int java_lang_boxing_object::long_value_offset;
3653 int java_lang_ref_Reference::referent_offset;
3654 int java_lang_ref_Reference::queue_offset;
3655 int java_lang_ref_Reference::next_offset;
3656 int java_lang_ref_Reference::discovered_offset;
3657 int java_lang_ref_Reference::number_of_fake_oop_fields;
3658 int java_lang_ref_SoftReference::timestamp_offset;
3659 int java_lang_ref_SoftReference::static_clock_offset;
3660 int java_lang_ClassLoader::parent_offset;
3661 int java_lang_System::static_in_offset;
3662 int java_lang_System::static_out_offset;
3663 int java_lang_System::static_err_offset;
3664 int java_lang_System::static_security_offset;
3665 int java_lang_StackTraceElement::methodName_offset;
3666 int java_lang_StackTraceElement::fileName_offset;
3667 int java_lang_StackTraceElement::lineNumber_offset;
3668 int java_lang_StackTraceElement::moduleName_offset;
3669 int java_lang_StackTraceElement::moduleVersion_offset;
3670 int java_lang_StackTraceElement::classLoaderName_offset;
3671 int java_lang_StackTraceElement::declaringClass_offset;
3672 int java_lang_StackTraceElement::declaringClassObject_offset;
3673 int java_lang_StackFrameInfo::_declaringClass_offset;
3674 int java_lang_StackFrameInfo::_memberName_offset;
3675 int java_lang_StackFrameInfo::_bci_offset;
3676 int java_lang_StackFrameInfo::_version_offset;
3677 int java_lang_LiveStackFrameInfo::_monitors_offset;
3678 int java_lang_LiveStackFrameInfo::_locals_offset;
3679 int java_lang_LiveStackFrameInfo::_operands_offset;
3680 int java_lang_LiveStackFrameInfo::_mode_offset;
3681 int java_lang_AssertionStatusDirectives::classes_offset;
3682 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3683 int java_lang_AssertionStatusDirectives::packages_offset;
3684 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3685 int java_lang_AssertionStatusDirectives::deflt_offset;
3686 int java_nio_Buffer::_limit_offset;
3687 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3688 int reflect_ConstantPool::_oop_offset;
3689 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3690
3691
3692 // Support for java_lang_StackTraceElement
3693
3694 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3695 element->obj_field_put(fileName_offset, value);
3696 }
3697
3698 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3699 element->obj_field_put(declaringClass_offset, value);
3700 }
3701
3702 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3703 element->obj_field_put(methodName_offset, value);
3704 }
3705
3706 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3707 element->int_field_put(lineNumber_offset, value);
3708 }
3709
3710 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
3711 element->obj_field_put(moduleName_offset, value);
3712 }
3713
3714 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
3715 element->obj_field_put(moduleVersion_offset, value);
3716 }
3717
3718 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
3719 element->obj_field_put(classLoaderName_offset, value);
3720 }
3721
3722 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
3723 element->obj_field_put(declaringClassObject_offset, value);
3724 }
3725
3726 // Support for java_lang_StackFrameInfo
3727 void java_lang_StackFrameInfo::set_declaringClass(oop element, oop value) {
3728 element->obj_field_put(_declaringClass_offset, value);
3729 }
3730
3731 void java_lang_StackFrameInfo::set_version(oop element, short value) {
3732 element->short_field_put(_version_offset, value);
3733 }
3734
3735 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
3736 element->int_field_put(_bci_offset, value);
3737 }
3738
3739 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
3740 element->obj_field_put(_monitors_offset, value);
3741 }
3742
3743 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
3744 element->obj_field_put(_locals_offset, value);
3745 }
3746
3747 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
3748 element->obj_field_put(_operands_offset, value);
3749 }
3750
3751 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
3752 element->int_field_put(_mode_offset, value);
3753 }
3754
3755 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3756
3757 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3758 o->obj_field_put(classes_offset, val);
3759 }
3760
3761 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3762 o->obj_field_put(classEnabled_offset, val);
3763 }
3764
3765 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3766 o->obj_field_put(packages_offset, val);
3767 }
3768
3769 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3770 o->obj_field_put(packageEnabled_offset, val);
3771 }
3772
3773 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3774 o->bool_field_put(deflt_offset, val);
3775 }
3776
3777
3778 // Support for intrinsification of java.nio.Buffer.checkIndex
3779 int java_nio_Buffer::limit_offset() {
3780 return _limit_offset;
3781 }
3782
3783
3784 void java_nio_Buffer::compute_offsets() {
3785 Klass* k = SystemDictionary::nio_Buffer_klass();
3786 assert(k != NULL, "must be loaded in 1.4+");
3787 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3788 }
3789
3790 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3791 if (_owner_offset != 0) return;
3792
3793 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3794 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3795 compute_offset(_owner_offset, k,
3796 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3797 }
3798
3799 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3800 assert(_owner_offset != 0, "Must be initialized");
3801 return obj->obj_field(_owner_offset);
3802 }
3803
3804 // Compute hard-coded offsets
3805 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3806 // are not available to determine the offset_of_static_fields.
3807 void JavaClasses::compute_hard_coded_offsets() {
3808 const int x = heapOopSize;
3809 const int header = instanceOopDesc::base_offset_in_bytes();
3810
3811 // Throwable Class
3812 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
3813 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3814 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3815 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x;
3816
3817 // java_lang_boxing_object
3818 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3819 java_lang_boxing_object::long_value_offset = align_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3820
3821 // java_lang_ref_Reference:
3822 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3823 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3824 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
3825 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
3826 // Artificial fields for java_lang_ref_Reference
3827 // The first field is for the discovered field added in 1.4
3828 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3829
3830 // java_lang_ref_SoftReference Class
3831 java_lang_ref_SoftReference::timestamp_offset = align_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3832 // Don't multiply static fields because they are always in wordSize units
3833 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3834
3835 // java_lang_ClassLoader
3836 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3837
3838 // java_lang_System
3839 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
3840 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3841 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3842 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3843
3844 // java_lang_StackTraceElement
3845 java_lang_StackTraceElement::declaringClassObject_offset = java_lang_StackTraceElement::hc_declaringClassObject_offset * x + header;
3846 java_lang_StackTraceElement::classLoaderName_offset = java_lang_StackTraceElement::hc_classLoaderName_offset * x + header;
3847 java_lang_StackTraceElement::moduleName_offset = java_lang_StackTraceElement::hc_moduleName_offset * x + header;
3848 java_lang_StackTraceElement::moduleVersion_offset = java_lang_StackTraceElement::hc_moduleVersion_offset * x + header;
3849 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
3850 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3851 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
3852 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3853 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3854 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3855 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3856 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3857 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3858
3859 }
3860
3861
3862 // Compute non-hard-coded field offsets of all the classes in this file
3863 void JavaClasses::compute_offsets() {
3864 // java_lang_Class::compute_offsets was called earlier in bootstrap
3865 java_lang_ClassLoader::compute_offsets();
3866 java_lang_Throwable::compute_offsets();
3867 java_lang_Thread::compute_offsets();
3868 java_lang_ThreadGroup::compute_offsets();
3869 java_lang_invoke_MethodHandle::compute_offsets();
3870 java_lang_invoke_DirectMethodHandle::compute_offsets();
3871 java_lang_invoke_MemberName::compute_offsets();
3872 java_lang_invoke_ResolvedMethodName::compute_offsets();
3873 java_lang_invoke_LambdaForm::compute_offsets();
3874 java_lang_invoke_MethodType::compute_offsets();
3875 java_lang_invoke_CallSite::compute_offsets();
3876 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets();
3877 java_security_AccessControlContext::compute_offsets();
3878 // Initialize reflection classes. The layouts of these classes
3879 // changed with the new reflection implementation in JDK 1.4, and
3880 // since the Universe doesn't know what JDK version it is until this
3881 // point we defer computation of these offsets until now.
3882 java_lang_reflect_AccessibleObject::compute_offsets();
3883 java_lang_reflect_Method::compute_offsets();
3884 java_lang_reflect_Constructor::compute_offsets();
3885 java_lang_reflect_Field::compute_offsets();
3886 java_nio_Buffer::compute_offsets();
3887 reflect_ConstantPool::compute_offsets();
3888 reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3889 java_lang_reflect_Parameter::compute_offsets();
3890 java_lang_Module::compute_offsets();
3891 java_lang_StackFrameInfo::compute_offsets();
3892 java_lang_LiveStackFrameInfo::compute_offsets();
3893
3894 // generated interpreter code wants to know about the offsets we just computed:
3895 AbstractAssembler::update_delayed_values();
3896 }
3897
3898 #ifndef PRODUCT
3899
3900 // These functions exist to assert the validity of hard-coded field offsets to guard
3901 // against changes in the class files
3902
3903 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3904 EXCEPTION_MARK;
3905 fieldDescriptor fd;
3906 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3907 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3908 InstanceKlass* ik = InstanceKlass::cast(k);
3909 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3910 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3911 if (!ik->find_local_field(f_name, f_sig, &fd)) {
3912 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3913 return false;
3914 }
3915 if (fd.is_static()) {
3916 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3917 return false;
3918 }
3919 if (fd.offset() == hardcoded_offset ) {
3920 return true;
3921 } else {
3922 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3923 klass_name, field_name, hardcoded_offset, fd.offset());
3924 return false;
3925 }
3926 }
3927
3928
3929 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3930 EXCEPTION_MARK;
3931 fieldDescriptor fd;
3932 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3933 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3934 InstanceKlass* ik = InstanceKlass::cast(k);
3935 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3936 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3937 if (!ik->find_local_field(f_name, f_sig, &fd)) {
3938 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3939 return false;
3940 }
3941 if (!fd.is_static()) {
3942 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3943 return false;
3944 }
3945 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3946 return true;
3947 } else {
3948 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());
3949 return false;
3950 }
3951 }
3952
3953
3954 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3955 EXCEPTION_MARK;
3956 fieldDescriptor fd;
3957 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3958 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3959 InstanceKlass* ik = InstanceKlass::cast(k);
3960 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3961 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3962 if (!ik->find_local_field(f_name, f_sig, &fd)) {
3963 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3964 return false;
3965 }
3966 if (!fd.is_static() || !fd.has_initial_value()) {
3967 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3968 return false;
3969 }
3970 if (!fd.initial_value_tag().is_int()) {
3971 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3972 return false;
3973 }
3974 jint field_value = fd.int_initial_value();
3975 if (field_value == hardcoded_constant) {
3976 return true;
3977 } else {
3978 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);
3979 return false;
3980 }
3981 }
3982
3983
3984 // Check the hard-coded field offsets of all the classes in this file
3985
3986 void JavaClasses::check_offsets() {
3987 bool valid = true;
3988
3989 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3990 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3991
3992 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3993 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3994
3995 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3996 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3997
3998 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3999 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
4000
4001 // java.lang.String
4002
4003 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[B");
4004 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
4005 CHECK_OFFSET("java/lang/String", java_lang_String, coder, "B");
4006
4007 // java.lang.Class
4008
4009 // Fake fields
4010 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
4011 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
4012
4013 // java.lang.Throwable
4014
4015 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
4016 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
4017 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
4018 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, depth, "I");
4019
4020 // Boxed primitive objects (java_lang_boxing_object)
4021
4022 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
4023 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4024 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
4025 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4026 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
4027 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
4028 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
4029 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4030
4031 // java.lang.ClassLoader
4032
4033 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
4034
4035 // java.lang.System
4036
4037 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
4038 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
4039 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
4040 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
4041
4042 // java.lang.StackTraceElement
4043
4044 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClassObject, "Ljava/lang/Class;");
4045 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, classLoaderName, "Ljava/lang/String;");
4046 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, moduleName, "Ljava/lang/String;");
4047 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, moduleVersion, "Ljava/lang/String;");
4048 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
4049 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
4050 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
4051 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
4052
4053 // java.lang.ref.Reference
4054
4055 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4056 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4057 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4058 // Fake field
4059 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4060
4061 // java.lang.ref.SoftReference
4062
4063 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
4064 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
4065
4066 // java.lang.AssertionStatusDirectives
4067 //
4068 // The CheckAssertionStatusDirectives boolean can be removed from here and
4069 // globals.hpp after the AssertionStatusDirectives class has been integrated
4070 // into merlin "for some time." Without it, the vm will fail with early
4071 // merlin builds.
4072
4073 if (CheckAssertionStatusDirectives) {
4074 const char* nm = "java/lang/AssertionStatusDirectives";
4075 const char* sig = "[Ljava/lang/String;";
4076 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
4077 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
4078 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
4079 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
4080 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
4081 }
4082
4083 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4084 }
4085
4086 #endif // PRODUCT
4087
4088 int InjectedField::compute_offset() {
4089 InstanceKlass* ik = InstanceKlass::cast(klass());
4090 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4091 if (!may_be_java && !fs.access_flags().is_internal()) {
4092 // Only look at injected fields
4093 continue;
4094 }
4095 if (fs.name() == name() && fs.signature() == signature()) {
4096 return fs.offset();
4097 }
4098 }
4099 ResourceMark rm;
4100 tty->print_cr("Invalid layout of %s at %s/%s%s", ik->external_name(), name()->as_C_string(), signature()->as_C_string(), may_be_java ? " (may_be_java)" : "");
4101 #ifndef PRODUCT
4102 ik->print();
4103 tty->print_cr("all fields:");
4104 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4105 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4106 }
4107 #endif //PRODUCT
4108 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
4109 return -1;
4110 }
4111
4112 void javaClasses_init() {
4113 JavaClasses::compute_offsets();
4114 JavaClasses::check_offsets();
4115 FilteredFieldsMap::initialize(); // must be done after computing offsets.
4116 }