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