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