1 /*
2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/altHashing.hpp"
27 #include "classfile/classLoaderData.inline.hpp"
28 #include "classfile/javaClasses.inline.hpp"
29 #include "classfile/moduleEntry.hpp"
30 #include "classfile/stringTable.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "code/debugInfo.hpp"
33 #include "code/dependencyContext.hpp"
34 #include "code/pcDesc.hpp"
35 #include "interpreter/interpreter.hpp"
36 #include "memory/oopFactory.hpp"
37 #include "memory/resourceArea.hpp"
38 #include "memory/universe.inline.hpp"
39 #include "oops/fieldStreams.hpp"
40 #include "oops/instanceKlass.hpp"
41 #include "oops/instanceMirrorKlass.hpp"
42 #include "oops/klass.hpp"
43 #include "oops/method.hpp"
44 #include "oops/objArrayOop.inline.hpp"
45 #include "oops/oop.inline.hpp"
46 #include "oops/symbol.hpp"
47 #include "oops/typeArrayOop.inline.hpp"
48 #include "runtime/access.inline.hpp"
49 #include "runtime/fieldDescriptor.hpp"
50 #include "runtime/handles.inline.hpp"
51 #include "runtime/interfaceSupport.hpp"
52 #include "runtime/java.hpp"
53 #include "runtime/javaCalls.hpp"
54 #include "runtime/safepoint.hpp"
55 #include "runtime/thread.inline.hpp"
56 #include "runtime/vframe.hpp"
57 #include "utilities/preserveException.hpp"
58
59 #if INCLUDE_JVMCI
60 #include "jvmci/jvmciJavaClasses.hpp"
61 #endif
62
63 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
64 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
65
66 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
67 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
68
69 InjectedField JavaClasses::_injected_fields[] = {
70 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
71 };
72
73 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
74 return _injected_fields[id].compute_offset();
75 }
76
77
78 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
79 *field_count = 0;
80
81 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
82 if (sid == vmSymbols::NO_SID) {
83 // Only well known classes can inject fields
84 return NULL;
85 }
86
87 int count = 0;
88 int start = -1;
89
90 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
91 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
92 count++; \
93 if (start == -1) start = klass##_##name##_enum; \
94 }
95 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
96 #undef LOOKUP_INJECTED_FIELD
97
98 if (start != -1) {
99 *field_count = count;
100 return _injected_fields + start;
101 }
102 return NULL;
103 }
104
105
106 static bool find_field(InstanceKlass* ik,
107 Symbol* name_symbol, Symbol* signature_symbol,
108 fieldDescriptor* fd,
109 bool is_static = false, bool allow_super = false) {
110 if (allow_super || is_static) {
111 return ik->find_field(name_symbol, signature_symbol, is_static, fd) != NULL;
112 } else {
113 return ik->find_local_field(name_symbol, signature_symbol, fd);
114 }
115 }
116
117 // Helpful routine for computing field offsets at run time rather than hardcoding them
118 static void
119 compute_offset(int &dest_offset,
120 Klass* klass, Symbol* name_symbol, Symbol* signature_symbol,
121 bool is_static = false, bool allow_super = false) {
122 fieldDescriptor fd;
123 InstanceKlass* ik = InstanceKlass::cast(klass);
124 if (!find_field(ik, name_symbol, signature_symbol, &fd, is_static, allow_super)) {
125 ResourceMark rm;
126 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
127 #ifndef PRODUCT
128 ik->print();
129 tty->print_cr("all fields:");
130 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
131 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
132 }
133 #endif //PRODUCT
134 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
135 }
136 dest_offset = fd.offset();
137 }
138
139 // Same as above but for "optional" offsets that might not be present in certain JDK versions
140 static void
141 compute_optional_offset(int& dest_offset,
142 Klass* klass, Symbol* name_symbol, Symbol* signature_symbol,
143 bool allow_super = false) {
144 fieldDescriptor fd;
145 InstanceKlass* ik = InstanceKlass::cast(klass);
146 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
147 dest_offset = fd.offset();
148 }
149 }
150
151
152 int java_lang_String::value_offset = 0;
153 int java_lang_String::hash_offset = 0;
154 int java_lang_String::coder_offset = 0;
155
156 bool java_lang_String::initialized = false;
157
158 bool java_lang_String::is_instance(oop obj) {
159 return is_instance_inlined(obj);
160 }
161
162 void java_lang_String::compute_offsets() {
163 assert(!initialized, "offsets should be initialized only once");
164
165 Klass* k = SystemDictionary::String_klass();
166 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::byte_array_signature());
167 compute_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature());
168 compute_offset(coder_offset, k, vmSymbols::coder_name(), vmSymbols::byte_signature());
169
170 initialized = true;
171 }
172
173 class CompactStringsFixup : public FieldClosure {
174 private:
175 bool _value;
176
177 public:
178 CompactStringsFixup(bool value) : _value(value) {}
179
180 void do_field(fieldDescriptor* fd) {
181 if (fd->name() == vmSymbols::compact_strings_name()) {
182 oop mirror = fd->field_holder()->java_mirror();
183 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
184 assert(mirror != NULL, "String must have mirror already");
185 mirror->bool_field_put(fd->offset(), _value);
186 }
187 }
188 };
189
190 void java_lang_String::set_compact_strings(bool value) {
191 CompactStringsFixup fix(value);
192 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix);
193 }
194
195 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
196 assert(initialized, "Must be initialized");
197 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
198
199 // Create the String object first, so there's a chance that the String
200 // and the char array it points to end up in the same cache line.
201 oop obj;
202 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
203
204 // Create the char array. The String object must be handlized here
205 // because GC can happen as a result of the allocation attempt.
206 Handle h_obj(THREAD, obj);
207 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
208 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
209
210 // Point the String at the char array
211 obj = h_obj();
212 set_value(obj, buffer);
213 // No need to zero the offset, allocation zero'ed the entire String object
214 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
215 return h_obj;
216 }
217
218 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
219 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
220 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
221 typeArrayOop buffer = value(h_obj());
222 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
223 if (is_latin1) {
224 for (int index = 0; index < length; index++) {
225 buffer->byte_at_put(index, (jbyte)unicode[index]);
226 }
227 } else {
228 for (int index = 0; index < length; index++) {
229 buffer->char_at_put(index, unicode[index]);
230 }
231 }
232
233 #ifdef ASSERT
234 {
235 ResourceMark rm;
236 char* expected = UNICODE::as_utf8(unicode, length);
237 char* actual = as_utf8_string(h_obj());
238 if (strcmp(expected, actual) != 0) {
239 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
240 ShouldNotReachHere();
241 }
242 }
243 #endif
244
245 return h_obj;
246 }
247
248 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
249 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
250 return h_obj();
251 }
252
253 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
254 if (utf8_str == NULL) {
255 return Handle();
256 }
257 bool has_multibyte, is_latin1;
258 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
259 if (!CompactStrings) {
260 has_multibyte = true;
261 is_latin1 = false;
262 }
263
264 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
265 if (length > 0) {
266 if (!has_multibyte) {
267 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length);
268 } else if (is_latin1) {
269 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
270 } else {
271 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
272 }
273 }
274
275 #ifdef ASSERT
276 // This check is too strict because the input string is not necessarily valid UTF8.
277 // For example, it may be created with arbitrary content via jni_NewStringUTF.
278 /*
279 {
280 ResourceMark rm;
281 const char* expected = utf8_str;
282 char* actual = as_utf8_string(h_obj());
283 if (strcmp(expected, actual) != 0) {
284 tty->print_cr("String conversion failure: %s --> %s", expected, actual);
285 ShouldNotReachHere();
286 }
287 }
288 */
289 #endif
290
291 return h_obj;
292 }
293
294 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
295 Handle h_obj = create_from_str(utf8_str, CHECK_0);
296 return h_obj();
297 }
298
299 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
300 const char* utf8_str = (char*)symbol->bytes();
301 int utf8_len = symbol->utf8_length();
302
303 bool has_multibyte, is_latin1;
304 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
305 if (!CompactStrings) {
306 has_multibyte = true;
307 is_latin1 = false;
308 }
309
310 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
311 if (length > 0) {
312 if (!has_multibyte) {
313 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length);
314 } else if (is_latin1) {
315 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
316 } else {
317 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
318 }
319 }
320
321 #ifdef ASSERT
322 {
323 ResourceMark rm;
324 const char* expected = symbol->as_utf8();
325 char* actual = as_utf8_string(h_obj());
326 if (strncmp(expected, actual, utf8_len) != 0) {
327 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
328 ShouldNotReachHere();
329 }
330 }
331 #endif
332
333 return h_obj;
334 }
335
336 // Converts a C string to a Java String based on current encoding
337 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
338 assert(str != NULL, "bad arguments");
339
340 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
341 static to_java_string_fn_t _to_java_string_fn = NULL;
342
343 if (_to_java_string_fn == NULL) {
344 void *lib_handle = os::native_java_library();
345 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
346 if (_to_java_string_fn == NULL) {
347 fatal("NewStringPlatform missing");
348 }
349 }
350
351 jstring js = NULL;
352 { JavaThread* thread = (JavaThread*)THREAD;
353 assert(thread->is_Java_thread(), "must be java thread");
354 HandleMark hm(thread);
355 ThreadToNativeFromVM ttn(thread);
356 js = (_to_java_string_fn)(thread->jni_environment(), str);
357 }
358 return Handle(THREAD, JNIHandles::resolve(js));
359 }
360
361 // Converts a Java String to a native C string that can be used for
362 // native OS calls.
363 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
364 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
365 static to_platform_string_fn_t _to_platform_string_fn = NULL;
366
367 if (_to_platform_string_fn == NULL) {
368 void *lib_handle = os::native_java_library();
369 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
370 if (_to_platform_string_fn == NULL) {
371 fatal("GetStringPlatformChars missing");
372 }
373 }
374
375 char *native_platform_string;
376 { JavaThread* thread = (JavaThread*)THREAD;
377 assert(thread->is_Java_thread(), "must be java thread");
378 JNIEnv *env = thread->jni_environment();
379 jstring js = (jstring) JNIHandles::make_local(env, java_string());
380 bool is_copy;
381 HandleMark hm(thread);
382 ThreadToNativeFromVM ttn(thread);
383 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
384 assert(is_copy == JNI_TRUE, "is_copy value changed");
385 JNIHandles::destroy_local(js);
386 }
387 return native_platform_string;
388 }
389
390 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
391 oop obj = java_string();
392 // Typical usage is to convert all '/' to '.' in string.
393 typeArrayOop value = java_lang_String::value(obj);
394 int length = java_lang_String::length(obj);
395 bool is_latin1 = java_lang_String::is_latin1(obj);
396
397 // First check if any from_char exist
398 int index; // Declared outside, used later
399 for (index = 0; index < length; index++) {
400 jchar c = !is_latin1 ? value->char_at(index) :
401 ((jchar) value->byte_at(index)) & 0xff;
402 if (c == from_char) {
403 break;
404 }
405 }
406 if (index == length) {
407 // No from_char, so do not copy.
408 return java_string;
409 }
410
411 // Check if result string will be latin1
412 bool to_is_latin1 = false;
413
414 // Replacement char must be latin1
415 if (CompactStrings && UNICODE::is_latin1(to_char)) {
416 if (is_latin1) {
417 // Source string is latin1 as well
418 to_is_latin1 = true;
419 } else if (!UNICODE::is_latin1(from_char)) {
420 // We are replacing an UTF16 char. Scan string to
421 // check if result can be latin1 encoded.
422 to_is_latin1 = true;
423 for (index = 0; index < length; index++) {
424 jchar c = value->char_at(index);
425 if (c != from_char && !UNICODE::is_latin1(c)) {
426 to_is_latin1 = false;
427 break;
428 }
429 }
430 }
431 }
432
433 // Create new UNICODE (or byte) buffer. Must handlize value because GC
434 // may happen during String and char array creation.
435 typeArrayHandle h_value(THREAD, value);
436 Handle string = basic_create(length, to_is_latin1, CHECK_NH);
437 typeArrayOop from_buffer = h_value();
438 typeArrayOop to_buffer = java_lang_String::value(string());
439
440 // Copy contents
441 for (index = 0; index < length; index++) {
442 jchar c = (!is_latin1) ? from_buffer->char_at(index) :
443 ((jchar) from_buffer->byte_at(index)) & 0xff;
444 if (c == from_char) {
445 c = to_char;
446 }
447 if (!to_is_latin1) {
448 to_buffer->char_at_put(index, c);
449 } else {
450 to_buffer->byte_at_put(index, (jbyte) c);
451 }
452 }
453 return string;
454 }
455
456 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
457 typeArrayOop value = java_lang_String::value(java_string);
458 length = java_lang_String::length(java_string);
459 bool is_latin1 = java_lang_String::is_latin1(java_string);
460
461 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
462 if (result != NULL) {
463 if (!is_latin1) {
464 for (int index = 0; index < length; index++) {
465 result[index] = value->char_at(index);
466 }
467 } else {
468 for (int index = 0; index < length; index++) {
469 result[index] = ((jchar) value->byte_at(index)) & 0xff;
470 }
471 }
472 } else {
473 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
474 }
475 return result;
476 }
477
478 unsigned int java_lang_String::hash_code(oop java_string) {
479 int length = java_lang_String::length(java_string);
480 // Zero length string will hash to zero with String.hashCode() function.
481 if (length == 0) return 0;
482
483 typeArrayOop value = java_lang_String::value(java_string);
484 bool is_latin1 = java_lang_String::is_latin1(java_string);
485
486 if (is_latin1) {
487 return java_lang_String::hash_code(value->byte_at_addr(0), length);
488 } else {
489 return java_lang_String::hash_code(value->char_at_addr(0), length);
490 }
491 }
492
493 char* java_lang_String::as_quoted_ascii(oop java_string) {
494 typeArrayOop value = java_lang_String::value(java_string);
495 int length = java_lang_String::length(java_string);
496 bool is_latin1 = java_lang_String::is_latin1(java_string);
497
498 if (length == 0) return NULL;
499
500 char* result;
501 int result_length;
502 if (!is_latin1) {
503 jchar* base = value->char_at_addr(0);
504 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
505 result = NEW_RESOURCE_ARRAY(char, result_length);
506 UNICODE::as_quoted_ascii(base, length, result, result_length);
507 } else {
508 jbyte* base = value->byte_at_addr(0);
509 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
510 result = NEW_RESOURCE_ARRAY(char, result_length);
511 UNICODE::as_quoted_ascii(base, length, result, result_length);
512 }
513 assert(result_length >= length + 1, "must not be shorter");
514 assert(result_length == (int)strlen(result) + 1, "must match");
515 return result;
516 }
517
518 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) {
519 typeArrayOop value = java_lang_String::value(java_string);
520 int length = java_lang_String::length(java_string);
521 bool is_latin1 = java_lang_String::is_latin1(java_string);
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(typeArrayOop value, int length, oop java_string, jchar* chars, int len) {
619 assert(java_string->klass() == SystemDictionary::String_klass(),
620 "must be java_string");
621 if (length != len) {
622 return false;
623 }
624 bool is_latin1 = java_lang_String::is_latin1(java_string);
625 if (!is_latin1) {
626 for (int i = 0; i < len; i++) {
627 if (value->char_at(i) != chars[i]) {
628 return false;
629 }
630 }
631 } else {
632 for (int i = 0; i < len; i++) {
633 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
634 return false;
635 }
636 }
637 }
638 return true;
639 }
640
641 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
642 typeArrayOop value = java_lang_String::value(java_string);
643 int length = java_lang_String::length(java_string);
644 return java_lang_String::equals(value, length, java_string, chars, len);
645 }
646
647 bool java_lang_String::equals(oop str1, oop str2) {
648 assert(str1->klass() == SystemDictionary::String_klass(),
649 "must be java String");
650 assert(str2->klass() == SystemDictionary::String_klass(),
651 "must be java String");
652 typeArrayOop value1 = java_lang_String::value(str1);
653 int length1 = value1->length();
654 bool is_latin1 = java_lang_String::is_latin1(str1);
655 typeArrayOop value2 = java_lang_String::value(str2);
656 int length2 = value2->length();
657 bool is_latin2 = java_lang_String::is_latin1(str2);
658
659 if ((length1 != length2) || (is_latin1 != is_latin2)) {
660 // Strings of different size or with different
661 // coders are never equal.
662 return false;
663 }
664 for (int i = 0; i < length1; i++) {
665 if (value1->byte_at(i) != value2->byte_at(i)) {
666 return false;
667 }
668 }
669 return true;
670 }
671
672 void java_lang_String::print(oop java_string, outputStream* st) {
673 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
674 typeArrayOop value = java_lang_String::value(java_string);
675
676 if (value == NULL) {
677 // This can happen if, e.g., printing a String
678 // object before its initializer has been called
679 st->print("NULL");
680 return;
681 }
682
683 int length = java_lang_String::length(java_string);
684 bool is_latin1 = java_lang_String::is_latin1(java_string);
685
686 st->print("\"");
687 for (int index = 0; index < length; index++) {
688 st->print("%c", (!is_latin1) ? value->char_at(index) :
689 ((jchar) value->byte_at(index)) & 0xff );
690 }
691 st->print("\"");
692 }
693
694
695 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
696 assert(mirror.not_null() && fd->is_static(), "just checking");
697 if (fd->has_initial_value()) {
698 BasicType t = fd->field_type();
699 switch (t) {
700 case T_BYTE:
701 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
702 break;
703 case T_BOOLEAN:
704 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
705 break;
706 case T_CHAR:
707 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
708 break;
709 case T_SHORT:
710 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
711 break;
712 case T_INT:
713 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
714 break;
715 case T_FLOAT:
716 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
717 break;
718 case T_DOUBLE:
719 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
720 break;
721 case T_LONG:
722 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
723 break;
724 case T_OBJECT:
725 {
726 #ifdef ASSERT
727 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
728 assert(fd->signature() == sym, "just checking");
729 #endif
730 oop string = fd->string_initial_value(CHECK);
731 mirror()->obj_field_put(fd->offset(), string);
732 }
733 break;
734 default:
735 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
736 "Illegal ConstantValue attribute in class file");
737 }
738 }
739 }
740
741
742 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
743 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
744
745 // If the offset was read from the shared archive, it was fixed up already
746 if (!k->is_shared()) {
747 if (k->is_instance_klass()) {
748 // During bootstrap, java.lang.Class wasn't loaded so static field
749 // offsets were computed without the size added it. Go back and
750 // update all the static field offsets to included the size.
751 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) {
752 if (fs.access_flags().is_static()) {
753 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
754 fs.set_offset(real_offset);
755 }
756 }
757 }
758 }
759 create_mirror(k, Handle(), Handle(), Handle(), CHECK);
760 }
761
762 void java_lang_Class::initialize_mirror_fields(Klass* k,
763 Handle mirror,
764 Handle protection_domain,
765 TRAPS) {
766 // Allocate a simple java object for a lock.
767 // This needs to be a java object because during class initialization
768 // it can be held across a java call.
769 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
770 set_init_lock(mirror(), r);
771
772 // Set protection domain also
773 set_protection_domain(mirror(), protection_domain());
774
775 // Initialize static fields
776 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
777 }
778
779 // Set the java.lang.Module module field in the java_lang_Class mirror
780 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
781 if (module.is_null()) {
782 // During startup, the module may be NULL only if java.base has not been defined yet.
783 // Put the class on the fixup_module_list to patch later when the java.lang.Module
784 // for java.base is known.
785 assert(!Universe::is_module_initialized(), "Incorrect java.lang.Module pre module system initialization");
786
787 bool javabase_was_defined = false;
788 {
789 MutexLocker m1(Module_lock, THREAD);
790 // Keep list of classes needing java.base module fixup
791 if (!ModuleEntryTable::javabase_defined()) {
792 if (fixup_module_field_list() == NULL) {
793 GrowableArray<Klass*>* list =
794 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
795 set_fixup_module_field_list(list);
796 }
797 k->class_loader_data()->inc_keep_alive();
798 fixup_module_field_list()->push(k);
799 } else {
800 javabase_was_defined = true;
801 }
802 }
803
804 // If java.base was already defined then patch this particular class with java.base.
805 if (javabase_was_defined) {
806 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
807 assert(javabase_entry != NULL && javabase_entry->module() != NULL,
808 "Setting class module field, " JAVA_BASE_NAME " should be defined");
809 Handle javabase_handle(THREAD, JNIHandles::resolve(javabase_entry->module()));
810 set_module(mirror(), javabase_handle());
811 }
812 } else {
813 assert(Universe::is_module_initialized() ||
814 (ModuleEntryTable::javabase_defined() &&
815 (module() == JNIHandles::resolve(ModuleEntryTable::javabase_moduleEntry()->module()))),
816 "Incorrect java.lang.Module specification while creating mirror");
817 set_module(mirror(), module());
818 }
819 }
820
821 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
822 Handle module, Handle protection_domain, TRAPS) {
823 assert(k->java_mirror() == NULL, "should only assign mirror once");
824 // Use this moment of initialization to cache modifier_flags also,
825 // to support Class.getModifiers(). Instance classes recalculate
826 // the cached flags after the class file is parsed, but before the
827 // class is put into the system dictionary.
828 int computed_modifiers = k->compute_modifier_flags(CHECK);
829 k->set_modifier_flags(computed_modifiers);
830 // Class_klass has to be loaded because it is used to allocate
831 // the mirror.
832 if (SystemDictionary::Class_klass_loaded()) {
833 // Allocate mirror (java.lang.Class instance)
834 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
835 Handle mirror(THREAD, mirror_oop);
836
837 // Setup indirection from mirror->klass
838 if (k != NULL) {
839 java_lang_Class::set_klass(mirror(), k);
840 }
841
842 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
843 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
844
845 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
846
847 // It might also have a component mirror. This mirror must already exist.
848 if (k->is_array_klass()) {
849 oop comp_mirror;
850 if (k->is_typeArray_klass()) {
851 BasicType type = TypeArrayKlass::cast(k)->element_type();
852 comp_mirror = Universe::java_mirror(type);
853 } else {
854 assert(k->is_objArray_klass(), "Must be");
855 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
856 assert(element_klass != NULL, "Must have an element klass");
857 comp_mirror = element_klass->java_mirror();
858 }
859 assert(comp_mirror != NULL, "must have a mirror");
860
861 // Two-way link between the array klass and its component mirror:
862 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
863 set_component_mirror(mirror(), comp_mirror);
864 set_array_klass(comp_mirror, k);
865 } else {
866 assert(k->is_instance_klass(), "Must be");
867
868 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
869 if (HAS_PENDING_EXCEPTION) {
870 // If any of the fields throws an exception like OOM remove the klass field
871 // from the mirror so GC doesn't follow it after the klass has been deallocated.
872 // This mirror looks like a primitive type, which logically it is because it
873 // it represents no class.
874 java_lang_Class::set_klass(mirror(), NULL);
875 return;
876 }
877 }
878
879 // set the classLoader field in the java_lang_Class instance
880 assert(class_loader() == k->class_loader(), "should be same");
881 set_class_loader(mirror(), class_loader());
882
883 // set the module field in the java_lang_Class instance
884 set_mirror_module_field(k, mirror, module, THREAD);
885
886 // Setup indirection from klass->mirror last
887 // after any exceptions can happen during allocations.
888 if (k != NULL) {
889 k->set_java_mirror(mirror());
890 }
891 } else {
892 if (fixup_mirror_list() == NULL) {
893 GrowableArray<Klass*>* list =
894 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
895 set_fixup_mirror_list(list);
896 }
897 fixup_mirror_list()->push(k);
898 }
899 }
900
901 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
902 assert(_module_offset != 0, "must have been computed already");
903 java_lang_Class::set_module(k->java_mirror(), module());
904 }
905
906 int java_lang_Class::oop_size(oop java_class) {
907 assert(_oop_size_offset != 0, "must be set");
908 int size = java_class->int_field(_oop_size_offset);
909 assert(size > 0, "Oop size must be greater than zero, not %d", size);
910 return size;
911 }
912
913 void java_lang_Class::set_oop_size(oop java_class, int size) {
914 assert(_oop_size_offset != 0, "must be set");
915 assert(size > 0, "Oop size must be greater than zero, not %d", size);
916 java_class->int_field_put(_oop_size_offset, size);
917 }
918
919 int java_lang_Class::static_oop_field_count(oop java_class) {
920 assert(_static_oop_field_count_offset != 0, "must be set");
921 return java_class->int_field(_static_oop_field_count_offset);
922 }
923 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
924 assert(_static_oop_field_count_offset != 0, "must be set");
925 java_class->int_field_put(_static_oop_field_count_offset, size);
926 }
927
928 oop java_lang_Class::protection_domain(oop java_class) {
929 assert(_protection_domain_offset != 0, "must be set");
930 return java_class->obj_field(_protection_domain_offset);
931 }
932 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
933 assert(_protection_domain_offset != 0, "must be set");
934 java_class->obj_field_put(_protection_domain_offset, pd);
935 }
936
937 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
938 assert(_component_mirror_offset != 0, "must be set");
939 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
940 }
941 oop java_lang_Class::component_mirror(oop java_class) {
942 assert(_component_mirror_offset != 0, "must be set");
943 return java_class->obj_field(_component_mirror_offset);
944 }
945
946 oop java_lang_Class::init_lock(oop java_class) {
947 assert(_init_lock_offset != 0, "must be set");
948 return java_class->obj_field(_init_lock_offset);
949 }
950 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
951 assert(_init_lock_offset != 0, "must be set");
952 java_class->obj_field_put(_init_lock_offset, init_lock);
953 }
954
955 objArrayOop java_lang_Class::signers(oop java_class) {
956 assert(_signers_offset != 0, "must be set");
957 return (objArrayOop)java_class->obj_field(_signers_offset);
958 }
959 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
960 assert(_signers_offset != 0, "must be set");
961 java_class->obj_field_put(_signers_offset, (oop)signers);
962 }
963
964
965 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
966 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
967 if (_class_loader_offset != 0) {
968 java_class->obj_field_put(_class_loader_offset, loader);
969 }
970 }
971
972 oop java_lang_Class::class_loader(oop java_class) {
973 assert(_class_loader_offset != 0, "must be set");
974 return java_class->obj_field(_class_loader_offset);
975 }
976
977 oop java_lang_Class::module(oop java_class) {
978 assert(_module_offset != 0, "must be set");
979 return java_class->obj_field(_module_offset);
980 }
981
982 void java_lang_Class::set_module(oop java_class, oop module) {
983 assert(_module_offset != 0, "must be set");
984 java_class->obj_field_put(_module_offset, module);
985 }
986
987 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
988 // This should be improved by adding a field at the Java level or by
989 // introducing a new VM klass (see comment in ClassFileParser)
990 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
991 if (type != T_VOID) {
992 Klass* aklass = Universe::typeArrayKlassObj(type);
993 assert(aklass != NULL, "correct bootstrap");
994 set_array_klass(java_class, aklass);
995 }
996 #ifdef ASSERT
997 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
998 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
999 #endif
1000 return java_class;
1001 }
1002
1003
1004 Klass* java_lang_Class::as_Klass(oop java_class) {
1005 //%note memory_2
1006 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1007 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1008 assert(k == NULL || k->is_klass(), "type check");
1009 return k;
1010 }
1011
1012
1013 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1014 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1015 java_class->metadata_field_put(_klass_offset, klass);
1016 }
1017
1018
1019 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1020 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1021 Symbol* name = NULL;
1022 bool is_instance = false;
1023 if (is_primitive(java_class)) {
1024 name = vmSymbols::type_signature(primitive_type(java_class));
1025 } else {
1026 Klass* k = as_Klass(java_class);
1027 is_instance = k->is_instance_klass();
1028 name = k->name();
1029 }
1030 if (name == NULL) {
1031 st->print("<null>");
1032 return;
1033 }
1034 if (is_instance) st->print("L");
1035 st->write((char*) name->base(), (int) name->utf8_length());
1036 if (is_instance) st->print(";");
1037 }
1038
1039 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
1040 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1041 Symbol* name;
1042 if (is_primitive(java_class)) {
1043 name = vmSymbols::type_signature(primitive_type(java_class));
1044 // Because this can create a new symbol, the caller has to decrement
1045 // the refcount, so make adjustment here and below for symbols returned
1046 // that are not created or incremented due to a successful lookup.
1047 name->increment_refcount();
1048 } else {
1049 Klass* k = as_Klass(java_class);
1050 if (!k->is_instance_klass()) {
1051 name = k->name();
1052 name->increment_refcount();
1053 } else {
1054 ResourceMark rm;
1055 const char* sigstr = k->signature_name();
1056 int siglen = (int) strlen(sigstr);
1057 if (!intern_if_not_found) {
1058 name = SymbolTable::probe(sigstr, siglen);
1059 } else {
1060 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
1061 }
1062 }
1063 }
1064 return name;
1065 }
1066
1067 // Returns the Java name for this Java mirror (Resource allocated)
1068 // See Klass::external_name().
1069 // For primitive type Java mirrors, its type name is returned.
1070 const char* java_lang_Class::as_external_name(oop java_class) {
1071 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1072 const char* name = NULL;
1073 if (is_primitive(java_class)) {
1074 name = type2name(primitive_type(java_class));
1075 } else {
1076 name = as_Klass(java_class)->external_name();
1077 }
1078 if (name == NULL) {
1079 name = "<null>";
1080 }
1081 return name;
1082 }
1083
1084 Klass* java_lang_Class::array_klass(oop java_class) {
1085 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
1086 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1087 return k;
1088 }
1089
1090
1091 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
1092 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1093 java_class->metadata_field_put(_array_klass_offset, klass);
1094 }
1095
1096
1097 bool java_lang_Class::is_primitive(oop java_class) {
1098 // should assert:
1099 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1100 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
1101
1102 #ifdef ASSERT
1103 if (is_primitive) {
1104 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
1105 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
1106 "Should be either the T_VOID primitive or a java primitive");
1107 }
1108 #endif
1109
1110 return is_primitive;
1111 }
1112
1113
1114 BasicType java_lang_Class::primitive_type(oop java_class) {
1115 assert(java_lang_Class::is_primitive(java_class), "just checking");
1116 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1117 BasicType type = T_VOID;
1118 if (ak != NULL) {
1119 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1120 type = ArrayKlass::cast(ak)->element_type();
1121 } else {
1122 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1123 }
1124 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1125 return type;
1126 }
1127
1128 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1129 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1130 if (is_primitive(java_class)) {
1131 if (reference_klass != NULL)
1132 (*reference_klass) = NULL;
1133 return primitive_type(java_class);
1134 } else {
1135 if (reference_klass != NULL)
1136 (*reference_klass) = as_Klass(java_class);
1137 return T_OBJECT;
1138 }
1139 }
1140
1141
1142 oop java_lang_Class::primitive_mirror(BasicType t) {
1143 oop mirror = Universe::java_mirror(t);
1144 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1145 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1146 return mirror;
1147 }
1148
1149 bool java_lang_Class::offsets_computed = false;
1150 int java_lang_Class::classRedefinedCount_offset = -1;
1151
1152 void java_lang_Class::compute_offsets() {
1153 assert(!offsets_computed, "offsets should be initialized only once");
1154 offsets_computed = true;
1155
1156 Klass* k = SystemDictionary::Class_klass();
1157 // The classRedefinedCount field is only present starting in 1.5,
1158 // so don't go fatal.
1159 compute_optional_offset(classRedefinedCount_offset,
1160 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
1161
1162 // Needs to be optional because the old build runs Queens during bootstrapping
1163 // and jdk8-9 doesn't have coordinated pushes yet.
1164 compute_optional_offset(_class_loader_offset,
1165 k, vmSymbols::classLoader_name(),
1166 vmSymbols::classloader_signature());
1167
1168 compute_offset(_component_mirror_offset,
1169 k, vmSymbols::componentType_name(),
1170 vmSymbols::class_signature());
1171
1172 compute_offset(_module_offset,
1173 k, vmSymbols::module_name(),
1174 vmSymbols::module_signature());
1175
1176 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1177 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1178 // GC treats them the same.
1179 _init_lock_offset = _component_mirror_offset;
1180
1181 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1182 }
1183
1184 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1185 if (classRedefinedCount_offset == -1) {
1186 // If we don't have an offset for it then just return -1 as a marker.
1187 return -1;
1188 }
1189
1190 return the_class_mirror->int_field(classRedefinedCount_offset);
1191 }
1192
1193 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1194 if (classRedefinedCount_offset == -1) {
1195 // If we don't have an offset for it then nothing to set.
1196 return;
1197 }
1198
1199 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1200 }
1201
1202
1203 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1204 // platform thread structure, and a eetop offset which was used for thread
1205 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1206 // merged, so in the HotSpot VM we just use the eetop field for the thread
1207 // instead of the privateInfo_offset.
1208 //
1209 // Note: The stackSize field is only present starting in 1.4.
1210
1211 int java_lang_Thread::_name_offset = 0;
1212 int java_lang_Thread::_group_offset = 0;
1213 int java_lang_Thread::_contextClassLoader_offset = 0;
1214 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1215 int java_lang_Thread::_priority_offset = 0;
1216 int java_lang_Thread::_eetop_offset = 0;
1217 int java_lang_Thread::_daemon_offset = 0;
1218 int java_lang_Thread::_stillborn_offset = 0;
1219 int java_lang_Thread::_stackSize_offset = 0;
1220 int java_lang_Thread::_tid_offset = 0;
1221 int java_lang_Thread::_thread_status_offset = 0;
1222 int java_lang_Thread::_park_blocker_offset = 0;
1223 int java_lang_Thread::_park_event_offset = 0 ;
1224
1225
1226 void java_lang_Thread::compute_offsets() {
1227 assert(_group_offset == 0, "offsets should be initialized only once");
1228
1229 Klass* k = SystemDictionary::Thread_klass();
1230 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1231 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
1232 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
1233 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
1234 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
1235 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1236 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
1237 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
1238 // The stackSize field is only present starting in 1.4, so don't go fatal.
1239 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
1240 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
1241 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
1242 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
1243 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
1244 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
1245 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
1246 vmSymbols::long_signature());
1247 }
1248
1249
1250 JavaThread* java_lang_Thread::thread(oop java_thread) {
1251 return (JavaThread*)java_thread->address_field(_eetop_offset);
1252 }
1253
1254
1255 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1256 java_thread->address_field_put(_eetop_offset, (address)thread);
1257 }
1258
1259
1260 oop java_lang_Thread::name(oop java_thread) {
1261 return java_thread->obj_field(_name_offset);
1262 }
1263
1264
1265 void java_lang_Thread::set_name(oop java_thread, oop name) {
1266 java_thread->obj_field_put(_name_offset, name);
1267 }
1268
1269
1270 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1271 return (ThreadPriority)java_thread->int_field(_priority_offset);
1272 }
1273
1274
1275 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1276 java_thread->int_field_put(_priority_offset, priority);
1277 }
1278
1279
1280 oop java_lang_Thread::threadGroup(oop java_thread) {
1281 return java_thread->obj_field(_group_offset);
1282 }
1283
1284
1285 bool java_lang_Thread::is_stillborn(oop java_thread) {
1286 return java_thread->bool_field(_stillborn_offset) != 0;
1287 }
1288
1289
1290 // We never have reason to turn the stillborn bit off
1291 void java_lang_Thread::set_stillborn(oop java_thread) {
1292 java_thread->bool_field_put(_stillborn_offset, true);
1293 }
1294
1295
1296 bool java_lang_Thread::is_alive(oop java_thread) {
1297 JavaThread* thr = java_lang_Thread::thread(java_thread);
1298 return (thr != NULL);
1299 }
1300
1301
1302 bool java_lang_Thread::is_daemon(oop java_thread) {
1303 return java_thread->bool_field(_daemon_offset) != 0;
1304 }
1305
1306
1307 void java_lang_Thread::set_daemon(oop java_thread) {
1308 java_thread->bool_field_put(_daemon_offset, true);
1309 }
1310
1311 oop java_lang_Thread::context_class_loader(oop java_thread) {
1312 return java_thread->obj_field(_contextClassLoader_offset);
1313 }
1314
1315 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1316 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1317 }
1318
1319
1320 jlong java_lang_Thread::stackSize(oop java_thread) {
1321 if (_stackSize_offset > 0) {
1322 return java_thread->long_field(_stackSize_offset);
1323 } else {
1324 return 0;
1325 }
1326 }
1327
1328 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1329 void java_lang_Thread::set_thread_status(oop java_thread,
1330 java_lang_Thread::ThreadStatus status) {
1331 // The threadStatus is only present starting in 1.5
1332 if (_thread_status_offset > 0) {
1333 java_thread->int_field_put(_thread_status_offset, status);
1334 }
1335 }
1336
1337 // Read thread status value from threadStatus field in java.lang.Thread java class.
1338 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1339 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() ||
1340 JavaThread::current()->thread_state() == _thread_in_vm,
1341 "Java Thread is not running in vm");
1342 // The threadStatus is only present starting in 1.5
1343 if (_thread_status_offset > 0) {
1344 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1345 } else {
1346 // All we can easily figure out is if it is alive, but that is
1347 // enough info for a valid unknown status.
1348 // These aren't restricted to valid set ThreadStatus values, so
1349 // use JVMTI values and cast.
1350 JavaThread* thr = java_lang_Thread::thread(java_thread);
1351 if (thr == NULL) {
1352 // the thread hasn't run yet or is in the process of exiting
1353 return NEW;
1354 }
1355 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1356 }
1357 }
1358
1359
1360 jlong java_lang_Thread::thread_id(oop java_thread) {
1361 // The thread ID field is only present starting in 1.5
1362 if (_tid_offset > 0) {
1363 return java_thread->long_field(_tid_offset);
1364 } else {
1365 return 0;
1366 }
1367 }
1368
1369 oop java_lang_Thread::park_blocker(oop java_thread) {
1370 assert(JDK_Version::current().supports_thread_park_blocker() &&
1371 _park_blocker_offset != 0, "Must support parkBlocker field");
1372
1373 if (_park_blocker_offset > 0) {
1374 return java_thread->obj_field(_park_blocker_offset);
1375 }
1376
1377 return NULL;
1378 }
1379
1380 jlong java_lang_Thread::park_event(oop java_thread) {
1381 if (_park_event_offset > 0) {
1382 return java_thread->long_field(_park_event_offset);
1383 }
1384 return 0;
1385 }
1386
1387 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1388 if (_park_event_offset > 0) {
1389 java_thread->long_field_put(_park_event_offset, ptr);
1390 return true;
1391 }
1392 return false;
1393 }
1394
1395
1396 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1397 assert(_thread_status_offset != 0, "Must have thread status");
1398 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1399 switch (status) {
1400 case NEW : return "NEW";
1401 case RUNNABLE : return "RUNNABLE";
1402 case SLEEPING : return "TIMED_WAITING (sleeping)";
1403 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1404 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1405 case PARKED : return "WAITING (parking)";
1406 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1407 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1408 case TERMINATED : return "TERMINATED";
1409 default : return "UNKNOWN";
1410 };
1411 }
1412 int java_lang_ThreadGroup::_parent_offset = 0;
1413 int java_lang_ThreadGroup::_name_offset = 0;
1414 int java_lang_ThreadGroup::_threads_offset = 0;
1415 int java_lang_ThreadGroup::_groups_offset = 0;
1416 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1417 int java_lang_ThreadGroup::_destroyed_offset = 0;
1418 int java_lang_ThreadGroup::_daemon_offset = 0;
1419 int java_lang_ThreadGroup::_nthreads_offset = 0;
1420 int java_lang_ThreadGroup::_ngroups_offset = 0;
1421
1422 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1423 assert(java_thread_group->is_oop(), "thread group must be oop");
1424 return java_thread_group->obj_field(_parent_offset);
1425 }
1426
1427 // ("name as oop" accessor is not necessary)
1428
1429 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1430 oop name = java_thread_group->obj_field(_name_offset);
1431 // ThreadGroup.name can be null
1432 if (name != NULL) {
1433 return java_lang_String::as_utf8_string(name);
1434 }
1435 return NULL;
1436 }
1437
1438 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1439 assert(java_thread_group->is_oop(), "thread group must be oop");
1440 return java_thread_group->int_field(_nthreads_offset);
1441 }
1442
1443 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1444 oop threads = java_thread_group->obj_field(_threads_offset);
1445 assert(threads != NULL, "threadgroups should have threads");
1446 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1447 return objArrayOop(threads);
1448 }
1449
1450 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1451 assert(java_thread_group->is_oop(), "thread group must be oop");
1452 return java_thread_group->int_field(_ngroups_offset);
1453 }
1454
1455 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1456 oop groups = java_thread_group->obj_field(_groups_offset);
1457 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1458 return objArrayOop(groups);
1459 }
1460
1461 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1462 assert(java_thread_group->is_oop(), "thread group must be oop");
1463 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1464 }
1465
1466 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1467 assert(java_thread_group->is_oop(), "thread group must be oop");
1468 return java_thread_group->bool_field(_destroyed_offset) != 0;
1469 }
1470
1471 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1472 assert(java_thread_group->is_oop(), "thread group must be oop");
1473 return java_thread_group->bool_field(_daemon_offset) != 0;
1474 }
1475
1476 void java_lang_ThreadGroup::compute_offsets() {
1477 assert(_parent_offset == 0, "offsets should be initialized only once");
1478
1479 Klass* k = SystemDictionary::ThreadGroup_klass();
1480
1481 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1482 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1483 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1484 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1485 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1486 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1487 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1488 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1489 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1490 }
1491
1492
1493 void java_lang_Throwable::compute_offsets() {
1494 Klass* k = SystemDictionary::Throwable_klass();
1495 compute_offset(depth_offset, k, vmSymbols::depth_name(), vmSymbols::int_signature());
1496 }
1497
1498 oop java_lang_Throwable::unassigned_stacktrace() {
1499 InstanceKlass* ik = SystemDictionary::Throwable_klass();
1500 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1501 if (UseCompressedOops) {
1502 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1503 } else {
1504 return oopDesc::load_decode_heap_oop((oop*)addr);
1505 }
1506 }
1507
1508 oop java_lang_Throwable::backtrace(oop throwable) {
1509 return throwable->obj_field_acquire(backtrace_offset);
1510 }
1511
1512
1513 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1514 throwable->release_obj_field_put(backtrace_offset, value);
1515 }
1516
1517 int java_lang_Throwable::depth(oop throwable) {
1518 return throwable->int_field(depth_offset);
1519 }
1520
1521 void java_lang_Throwable::set_depth(oop throwable, int value) {
1522 throwable->int_field_put(depth_offset, value);
1523 }
1524
1525 oop java_lang_Throwable::message(oop throwable) {
1526 return throwable->obj_field(detailMessage_offset);
1527 }
1528
1529
1530 // Return Symbol for detailed_message or NULL
1531 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1532 PRESERVE_EXCEPTION_MARK; // Keep original exception
1533 oop detailed_message = java_lang_Throwable::message(throwable);
1534 if (detailed_message != NULL) {
1535 return java_lang_String::as_symbol(detailed_message, THREAD);
1536 }
1537 return NULL;
1538 }
1539
1540 void java_lang_Throwable::set_message(oop throwable, oop value) {
1541 throwable->obj_field_put(detailMessage_offset, value);
1542 }
1543
1544
1545 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1546 throwable->obj_field_put(stackTrace_offset, st_element_array);
1547 }
1548
1549 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1550 set_stacktrace(throwable, NULL);
1551 }
1552
1553
1554 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1555 ResourceMark rm;
1556 Klass* k = throwable->klass();
1557 assert(k != NULL, "just checking");
1558 st->print("%s", k->external_name());
1559 oop msg = message(throwable);
1560 if (msg != NULL) {
1561 st->print(": %s", java_lang_String::as_utf8_string(msg));
1562 }
1563 }
1564
1565 // After this many redefines, the stack trace is unreliable.
1566 const int MAX_VERSION = USHRT_MAX;
1567
1568 static inline bool version_matches(Method* method, int version) {
1569 assert(version < MAX_VERSION, "version is too big");
1570 return method != NULL && (method->constants()->version() == version);
1571 }
1572
1573
1574 // This class provides a simple wrapper over the internal structure of
1575 // exception backtrace to insulate users of the backtrace from needing
1576 // to know what it looks like.
1577 class BacktraceBuilder: public StackObj {
1578 friend class BacktraceIterator;
1579 private:
1580 Handle _backtrace;
1581 objArrayOop _head;
1582 typeArrayOop _methods;
1583 typeArrayOop _bcis;
1584 objArrayOop _mirrors;
1585 typeArrayOop _names; // needed to insulate method name against redefinition
1586 int _index;
1587 NoSafepointVerifier _nsv;
1588
1589 enum {
1590 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1591 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1592 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1593 trace_names_offset = java_lang_Throwable::trace_names_offset,
1594 trace_next_offset = java_lang_Throwable::trace_next_offset,
1595 trace_size = java_lang_Throwable::trace_size,
1596 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1597 };
1598
1599 // get info out of chunks
1600 static typeArrayOop get_methods(objArrayHandle chunk) {
1601 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1602 assert(methods != NULL, "method array should be initialized in backtrace");
1603 return methods;
1604 }
1605 static typeArrayOop get_bcis(objArrayHandle chunk) {
1606 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1607 assert(bcis != NULL, "bci array should be initialized in backtrace");
1608 return bcis;
1609 }
1610 static objArrayOop get_mirrors(objArrayHandle chunk) {
1611 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1612 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1613 return mirrors;
1614 }
1615 static typeArrayOop get_names(objArrayHandle chunk) {
1616 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
1617 assert(names != NULL, "names array should be initialized in backtrace");
1618 return names;
1619 }
1620
1621 public:
1622
1623 // constructor for new backtrace
1624 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _names(NULL) {
1625 expand(CHECK);
1626 _backtrace = Handle(THREAD, _head);
1627 _index = 0;
1628 }
1629
1630 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
1631 _methods = get_methods(backtrace);
1632 _bcis = get_bcis(backtrace);
1633 _mirrors = get_mirrors(backtrace);
1634 _names = get_names(backtrace);
1635 assert(_methods->length() == _bcis->length() &&
1636 _methods->length() == _mirrors->length() &&
1637 _mirrors->length() == _names->length(),
1638 "method and source information arrays should match");
1639
1640 // head is the preallocated backtrace
1641 _head = backtrace();
1642 _backtrace = Handle(thread, _head);
1643 _index = 0;
1644 }
1645
1646 void expand(TRAPS) {
1647 objArrayHandle old_head(THREAD, _head);
1648 PauseNoSafepointVerifier pnsv(&_nsv);
1649
1650 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1651 objArrayHandle new_head(THREAD, head);
1652
1653 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1654 typeArrayHandle new_methods(THREAD, methods);
1655
1656 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1657 typeArrayHandle new_bcis(THREAD, bcis);
1658
1659 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1660 objArrayHandle new_mirrors(THREAD, mirrors);
1661
1662 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
1663 typeArrayHandle new_names(THREAD, names);
1664
1665 if (!old_head.is_null()) {
1666 old_head->obj_at_put(trace_next_offset, new_head());
1667 }
1668 new_head->obj_at_put(trace_methods_offset, new_methods());
1669 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1670 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1671 new_head->obj_at_put(trace_names_offset, new_names());
1672
1673 _head = new_head();
1674 _methods = new_methods();
1675 _bcis = new_bcis();
1676 _mirrors = new_mirrors();
1677 _names = new_names();
1678 _index = 0;
1679 }
1680
1681 oop backtrace() {
1682 return _backtrace();
1683 }
1684
1685 inline void push(Method* method, int bci, TRAPS) {
1686 // Smear the -1 bci to 0 since the array only holds unsigned
1687 // shorts. The later line number lookup would just smear the -1
1688 // to a 0 even if it could be recorded.
1689 if (bci == SynchronizationEntryBCI) bci = 0;
1690
1691 if (_index >= trace_chunk_size) {
1692 methodHandle mhandle(THREAD, method);
1693 expand(CHECK);
1694 method = mhandle();
1695 }
1696
1697 _methods->short_at_put(_index, method->orig_method_idnum());
1698 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
1699
1700 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
1701 // klass owning the symbols alive so their refcounts aren't decremented.
1702 Symbol* name = method->name();
1703 _names->symbol_at_put(_index, name);
1704
1705 // We need to save the mirrors in the backtrace to keep the class
1706 // from being unloaded while we still have this stack trace.
1707 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1708 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1709 _index++;
1710 }
1711
1712 };
1713
1714 struct BacktraceElement : public StackObj {
1715 int _method_id;
1716 int _bci;
1717 int _version;
1718 Symbol* _name;
1719 Handle _mirror;
1720 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
1721 _mirror(mirror), _method_id(mid), _version(version), _bci(bci), _name(name) {}
1722 };
1723
1724 class BacktraceIterator : public StackObj {
1725 int _index;
1726 objArrayHandle _result;
1727 objArrayHandle _mirrors;
1728 typeArrayHandle _methods;
1729 typeArrayHandle _bcis;
1730 typeArrayHandle _names;
1731
1732 void init(objArrayHandle result, Thread* thread) {
1733 // Get method id, bci, version and mirror from chunk
1734 _result = result;
1735 if (_result.not_null()) {
1736 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
1737 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
1738 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
1739 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
1740 _index = 0;
1741 }
1742 }
1743 public:
1744 BacktraceIterator(objArrayHandle result, Thread* thread) {
1745 init(result, thread);
1746 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
1747 }
1748
1749 BacktraceElement next(Thread* thread) {
1750 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
1751 _methods->short_at(_index),
1752 Backtrace::version_at(_bcis->int_at(_index)),
1753 Backtrace::bci_at(_bcis->int_at(_index)),
1754 _names->symbol_at(_index));
1755 _index++;
1756
1757 if (_index >= java_lang_Throwable::trace_chunk_size) {
1758 int next_offset = java_lang_Throwable::trace_next_offset;
1759 // Get next chunk
1760 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
1761 init(result, thread);
1762 }
1763 return e;
1764 }
1765
1766 bool repeat() {
1767 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
1768 }
1769 };
1770
1771
1772 // Print stack trace element to resource allocated buffer
1773 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
1774 int version, int bci, Symbol* name) {
1775 ResourceMark rm;
1776
1777 // Get strings and string lengths
1778 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1779 const char* klass_name = holder->external_name();
1780 int buf_len = (int)strlen(klass_name);
1781
1782 char* method_name = name->as_C_string();
1783 buf_len += (int)strlen(method_name);
1784
1785 char* source_file_name = NULL;
1786 Symbol* source = Backtrace::get_source_file_name(holder, version);
1787 if (source != NULL) {
1788 source_file_name = source->as_C_string();
1789 buf_len += (int)strlen(source_file_name);
1790 }
1791
1792 char *module_name = NULL, *module_version = NULL;
1793 ModuleEntry* module = holder->module();
1794 if (module->is_named()) {
1795 module_name = module->name()->as_C_string();
1796 buf_len += (int)strlen(module_name);
1797 if (module->version() != NULL) {
1798 module_version = module->version()->as_C_string();
1799 buf_len += (int)strlen(module_version);
1800 }
1801 }
1802
1803 // Allocate temporary buffer with extra space for formatting and line number
1804 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1805
1806 // Print stack trace line in buffer
1807 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
1808
1809 // Print module information
1810 if (module_name != NULL) {
1811 if (module_version != NULL) {
1812 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
1813 } else {
1814 sprintf(buf + (int)strlen(buf), "%s/", module_name);
1815 }
1816 }
1817
1818 // The method can be NULL if the requested class version is gone
1819 Method* method = holder->method_with_orig_idnum(method_id, version);
1820 if (!version_matches(method, version)) {
1821 strcat(buf, "Redefined)");
1822 } else {
1823 int line_number = Backtrace::get_line_number(method, bci);
1824 if (line_number == -2) {
1825 strcat(buf, "Native Method)");
1826 } else {
1827 if (source_file_name != NULL && (line_number != -1)) {
1828 // Sourcename and linenumber
1829 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
1830 } else if (source_file_name != NULL) {
1831 // Just sourcename
1832 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
1833 } else {
1834 // Neither sourcename nor linenumber
1835 sprintf(buf + (int)strlen(buf), "Unknown Source)");
1836 }
1837 CompiledMethod* nm = method->code();
1838 if (WizardMode && nm != NULL) {
1839 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1840 }
1841 }
1842 }
1843
1844 st->print_cr("%s", buf);
1845 }
1846
1847 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
1848 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
1849 int method_id = method->orig_method_idnum();
1850 int version = method->constants()->version();
1851 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
1852 }
1853
1854 /**
1855 * Print the throwable message and its stack trace plus all causes by walking the
1856 * cause chain. The output looks the same as of Throwable.printStackTrace().
1857 */
1858 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
1859 // First, print the message.
1860 print(throwable(), st);
1861 st->cr();
1862
1863 // Now print the stack trace.
1864 Thread* THREAD = Thread::current();
1865 while (throwable.not_null()) {
1866 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
1867 if (result.is_null()) {
1868 st->print_raw_cr("\t<<no stack trace available>>");
1869 return;
1870 }
1871 BacktraceIterator iter(result, THREAD);
1872
1873 while (iter.repeat()) {
1874 BacktraceElement bte = iter.next(THREAD);
1875 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
1876 }
1877 {
1878 // Call getCause() which doesn't necessarily return the _cause field.
1879 EXCEPTION_MARK;
1880 JavaValue cause(T_OBJECT);
1881 JavaCalls::call_virtual(&cause,
1882 throwable,
1883 throwable->klass(),
1884 vmSymbols::getCause_name(),
1885 vmSymbols::void_throwable_signature(),
1886 THREAD);
1887 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1888 if (HAS_PENDING_EXCEPTION) {
1889 CLEAR_PENDING_EXCEPTION;
1890 throwable = Handle();
1891 } else {
1892 throwable = Handle(THREAD, (oop) cause.get_jobject());
1893 if (throwable.not_null()) {
1894 st->print("Caused by: ");
1895 print(throwable(), st);
1896 st->cr();
1897 }
1898 }
1899 }
1900 }
1901 }
1902
1903 /**
1904 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
1905 */
1906 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
1907 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
1908 JavaValue result(T_VOID);
1909 JavaCalls::call_virtual(&result,
1910 throwable,
1911 SystemDictionary::Throwable_klass(),
1912 vmSymbols::printStackTrace_name(),
1913 vmSymbols::void_method_signature(),
1914 THREAD);
1915 }
1916
1917 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
1918 if (!StackTraceInThrowable) return;
1919 ResourceMark rm(THREAD);
1920
1921 // Start out by clearing the backtrace for this object, in case the VM
1922 // runs out of memory while allocating the stack trace
1923 set_backtrace(throwable(), NULL);
1924 // Clear lazily constructed Java level stacktrace if refilling occurs
1925 // This is unnecessary in 1.7+ but harmless
1926 clear_stacktrace(throwable());
1927
1928 int max_depth = MaxJavaStackTraceDepth;
1929 JavaThread* thread = (JavaThread*)THREAD;
1930
1931 BacktraceBuilder bt(CHECK);
1932
1933 // If there is no Java frame just return the method that was being called
1934 // with bci 0
1935 if (!thread->has_last_Java_frame()) {
1936 if (max_depth >= 1 && method() != NULL) {
1937 bt.push(method(), 0, CHECK);
1938 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
1939 set_depth(throwable(), 1);
1940 set_backtrace(throwable(), bt.backtrace());
1941 }
1942 return;
1943 }
1944
1945 // Instead of using vframe directly, this version of fill_in_stack_trace
1946 // basically handles everything by hand. This significantly improved the
1947 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1948 // See bug 6333838 for more details.
1949 // The "ASSERT" here is to verify this method generates the exactly same stack
1950 // trace as utilizing vframe.
1951 #ifdef ASSERT
1952 vframeStream st(thread);
1953 methodHandle st_method(THREAD, st.method());
1954 #endif
1955 int total_count = 0;
1956 RegisterMap map(thread, false);
1957 int decode_offset = 0;
1958 CompiledMethod* nm = NULL;
1959 bool skip_fillInStackTrace_check = false;
1960 bool skip_throwableInit_check = false;
1961 bool skip_hidden = !ShowHiddenFrames;
1962
1963 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1964 Method* method = NULL;
1965 int bci = 0;
1966
1967 // Compiled java method case.
1968 if (decode_offset != 0) {
1969 DebugInfoReadStream stream(nm, decode_offset);
1970 decode_offset = stream.read_int();
1971 method = (Method*)nm->metadata_at(stream.read_int());
1972 bci = stream.read_bci();
1973 } else {
1974 if (fr.is_first_frame()) break;
1975 address pc = fr.pc();
1976 if (fr.is_interpreted_frame()) {
1977 address bcp = fr.interpreter_frame_bcp();
1978 method = fr.interpreter_frame_method();
1979 bci = method->bci_from(bcp);
1980 fr = fr.sender(&map);
1981 } else {
1982 CodeBlob* cb = fr.cb();
1983 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1984 // but non nmethod
1985 fr = fr.sender(&map);
1986 if (cb == NULL || !cb->is_compiled()) {
1987 continue;
1988 }
1989 nm = cb->as_compiled_method();
1990 if (nm->method()->is_native()) {
1991 method = nm->method();
1992 bci = 0;
1993 } else {
1994 PcDesc* pd = nm->pc_desc_at(pc);
1995 decode_offset = pd->scope_decode_offset();
1996 // if decode_offset is not equal to 0, it will execute the
1997 // "compiled java method case" at the beginning of the loop.
1998 continue;
1999 }
2000 }
2001 }
2002 #ifdef ASSERT
2003 assert(st_method() == method && st.bci() == bci,
2004 "Wrong stack trace");
2005 st.next();
2006 // vframeStream::method isn't GC-safe so store off a copy
2007 // of the Method* in case we GC.
2008 if (!st.at_end()) {
2009 st_method = st.method();
2010 }
2011 #endif
2012
2013 // the format of the stacktrace will be:
2014 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2015 // - 0 or more <init> methods for the exception class (skipped)
2016 // - rest of the stack
2017
2018 if (!skip_fillInStackTrace_check) {
2019 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2020 throwable->is_a(method->method_holder())) {
2021 continue;
2022 }
2023 else {
2024 skip_fillInStackTrace_check = true; // gone past them all
2025 }
2026 }
2027 if (!skip_throwableInit_check) {
2028 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2029
2030 // skip <init> methods of the exception class and superclasses
2031 // This is simlar to classic VM.
2032 if (method->name() == vmSymbols::object_initializer_name() &&
2033 throwable->is_a(method->method_holder())) {
2034 continue;
2035 } else {
2036 // there are none or we've seen them all - either way stop checking
2037 skip_throwableInit_check = true;
2038 }
2039 }
2040 if (method->is_hidden()) {
2041 if (skip_hidden) continue;
2042 }
2043 bt.push(method, bci, CHECK);
2044 total_count++;
2045 }
2046
2047 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2048
2049 // Put completed stack trace into throwable object
2050 set_backtrace(throwable(), bt.backtrace());
2051 set_depth(throwable(), total_count);
2052 }
2053
2054 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2055 // No-op if stack trace is disabled
2056 if (!StackTraceInThrowable) {
2057 return;
2058 }
2059
2060 // Disable stack traces for some preallocated out of memory errors
2061 if (!Universe::should_fill_in_stack_trace(throwable)) {
2062 return;
2063 }
2064
2065 PRESERVE_EXCEPTION_MARK;
2066
2067 JavaThread* thread = JavaThread::active();
2068 fill_in_stack_trace(throwable, method, thread);
2069 // ignore exceptions thrown during stack trace filling
2070 CLEAR_PENDING_EXCEPTION;
2071 }
2072
2073 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2074 // Allocate stack trace - backtrace is created but not filled in
2075
2076 // No-op if stack trace is disabled
2077 if (!StackTraceInThrowable) return;
2078 BacktraceBuilder bt(CHECK); // creates a backtrace
2079 set_backtrace(throwable(), bt.backtrace());
2080 }
2081
2082
2083 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2084 // Fill in stack trace into preallocated backtrace (no GC)
2085
2086 // No-op if stack trace is disabled
2087 if (!StackTraceInThrowable) return;
2088
2089 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2090
2091 JavaThread* THREAD = JavaThread::current();
2092
2093 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2094 assert(backtrace.not_null(), "backtrace should have been preallocated");
2095
2096 ResourceMark rm(THREAD);
2097 vframeStream st(THREAD);
2098
2099 BacktraceBuilder bt(THREAD, backtrace);
2100
2101 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2102 // methods as preallocated errors aren't created by "java" code.
2103
2104 // fill in as much stack trace as possible
2105 int chunk_count = 0;
2106 for (;!st.at_end(); st.next()) {
2107 bt.push(st.method(), st.bci(), CHECK);
2108 chunk_count++;
2109
2110 // Bail-out for deep stacks
2111 if (chunk_count >= trace_chunk_size) break;
2112 }
2113 set_depth(throwable(), chunk_count);
2114 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2115
2116 // We support the Throwable immutability protocol defined for Java 7.
2117 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2118 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2119 }
2120
2121 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2122 objArrayHandle stack_trace_array_h, TRAPS) {
2123
2124 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2125 THROW(vmSymbols::java_lang_NullPointerException());
2126 }
2127
2128 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2129
2130 if (stack_trace_array_h->length() != depth(throwable())) {
2131 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2132 }
2133
2134 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2135 BacktraceIterator iter(result, THREAD);
2136
2137 int index = 0;
2138 while (iter.repeat()) {
2139 BacktraceElement bte = iter.next(THREAD);
2140
2141 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2142
2143 if (stack_trace_element.is_null()) {
2144 THROW(vmSymbols::java_lang_NullPointerException());
2145 }
2146
2147 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2148 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2149
2150 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2151 method,
2152 bte._version,
2153 bte._bci,
2154 bte._name, CHECK);
2155 }
2156 }
2157
2158 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2159 // Allocate java.lang.StackTraceElement instance
2160 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2161 assert(k != NULL, "must be loaded in 1.4+");
2162 if (k->should_be_initialized()) {
2163 k->initialize(CHECK_0);
2164 }
2165
2166 Handle element = k->allocate_instance_handle(CHECK_0);
2167
2168 int version = method->constants()->version();
2169 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2170 return element();
2171 }
2172
2173 void java_lang_StackTraceElement::fill_in(Handle element,
2174 InstanceKlass* holder, const methodHandle& method,
2175 int version, int bci, Symbol* name, TRAPS) {
2176 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2177
2178 // Fill in class name
2179 ResourceMark rm(THREAD);
2180 const char* str = holder->external_name();
2181 oop classname = StringTable::intern((char*) str, CHECK);
2182 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2183 java_lang_StackTraceElement::set_declaringClassObject(element(), holder->java_mirror());
2184
2185 oop loader = holder->class_loader();
2186 if (loader != NULL) {
2187 oop loader_name = java_lang_ClassLoader::name(loader);
2188 if (loader_name != NULL)
2189 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2190 }
2191
2192 // Fill in method name
2193 oop methodname = StringTable::intern(name, CHECK);
2194 java_lang_StackTraceElement::set_methodName(element(), methodname);
2195
2196 // Fill in module name and version
2197 ModuleEntry* module = holder->module();
2198 if (module->is_named()) {
2199 oop module_name = StringTable::intern(module->name(), CHECK);
2200 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2201 oop module_version;
2202 if (module->version() != NULL) {
2203 module_version = StringTable::intern(module->version(), CHECK);
2204 } else {
2205 module_version = NULL;
2206 }
2207 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2208 }
2209
2210 if (method() == NULL || !version_matches(method(), version)) {
2211 // The method was redefined, accurate line number information isn't available
2212 java_lang_StackTraceElement::set_fileName(element(), NULL);
2213 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2214 } else {
2215 // Fill in source file name and line number.
2216 Symbol* source = Backtrace::get_source_file_name(holder, version);
2217 if (ShowHiddenFrames && source == NULL)
2218 source = vmSymbols::unknown_class_name();
2219 oop filename = StringTable::intern(source, CHECK);
2220 java_lang_StackTraceElement::set_fileName(element(), filename);
2221
2222 int line_number = Backtrace::get_line_number(method, bci);
2223 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2224 }
2225 }
2226
2227 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2228 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2229 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2230 // we should expand MemberName::name when Throwable uses StackTrace
2231 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2232 return method;
2233 }
2234
2235 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci) {
2236 // set Method* or mid/cpref
2237 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2238 InstanceKlass* ik = method->method_holder();
2239 CallInfo info(method(), ik);
2240 MethodHandles::init_method_MemberName(mname, info);
2241 // set bci
2242 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2243 // method may be redefined; store the version
2244 int version = method->constants()->version();
2245 assert((jushort)version == version, "version should be short");
2246 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2247 }
2248
2249 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2250 ResourceMark rm(THREAD);
2251 Handle k (THREAD, stackFrame->obj_field(_declaringClass_offset));
2252 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(k()));
2253 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2254
2255 short version = stackFrame->short_field(_version_offset);
2256 short bci = stackFrame->short_field(_bci_offset);
2257 Symbol* name = method->name();
2258 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK);
2259 }
2260
2261 void java_lang_StackFrameInfo::compute_offsets() {
2262 Klass* k = SystemDictionary::StackFrameInfo_klass();
2263 compute_offset(_declaringClass_offset, k, vmSymbols::declaringClass_name(), vmSymbols::class_signature());
2264 compute_offset(_memberName_offset, k, vmSymbols::memberName_name(), vmSymbols::object_signature());
2265 compute_offset(_bci_offset, k, vmSymbols::bci_name(), vmSymbols::short_signature());
2266 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2267 }
2268
2269 void java_lang_LiveStackFrameInfo::compute_offsets() {
2270 Klass* k = SystemDictionary::LiveStackFrameInfo_klass();
2271 compute_offset(_monitors_offset, k, vmSymbols::monitors_name(), vmSymbols::object_array_signature());
2272 compute_offset(_locals_offset, k, vmSymbols::locals_name(), vmSymbols::object_array_signature());
2273 compute_offset(_operands_offset, k, vmSymbols::operands_name(), vmSymbols::object_array_signature());
2274 compute_offset(_mode_offset, k, vmSymbols::mode_name(), vmSymbols::int_signature());
2275 }
2276
2277 void java_lang_reflect_AccessibleObject::compute_offsets() {
2278 Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
2279 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
2280 }
2281
2282 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2283 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2284 return (jboolean) reflect->bool_field(override_offset);
2285 }
2286
2287 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2288 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2289 reflect->bool_field_put(override_offset, (int) value);
2290 }
2291
2292 void java_lang_reflect_Method::compute_offsets() {
2293 Klass* k = SystemDictionary::reflect_Method_klass();
2294 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2295 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2296 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
2297 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2298 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2299 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2300 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2301 // The generic signature and annotations fields are only present in 1.5
2302 signature_offset = -1;
2303 annotations_offset = -1;
2304 parameter_annotations_offset = -1;
2305 annotation_default_offset = -1;
2306 type_annotations_offset = -1;
2307 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2308 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2309 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2310 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
2311 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2312 }
2313
2314 Handle java_lang_reflect_Method::create(TRAPS) {
2315 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2316 Klass* klass = SystemDictionary::reflect_Method_klass();
2317 // This class is eagerly initialized during VM initialization, since we keep a refence
2318 // to one of the methods
2319 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2320 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2321 }
2322
2323 oop java_lang_reflect_Method::clazz(oop reflect) {
2324 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2325 return reflect->obj_field(clazz_offset);
2326 }
2327
2328 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2329 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2330 reflect->obj_field_put(clazz_offset, value);
2331 }
2332
2333 int java_lang_reflect_Method::slot(oop reflect) {
2334 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2335 return reflect->int_field(slot_offset);
2336 }
2337
2338 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2339 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2340 reflect->int_field_put(slot_offset, value);
2341 }
2342
2343 oop java_lang_reflect_Method::name(oop method) {
2344 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2345 return method->obj_field(name_offset);
2346 }
2347
2348 void java_lang_reflect_Method::set_name(oop method, oop value) {
2349 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2350 method->obj_field_put(name_offset, value);
2351 }
2352
2353 oop java_lang_reflect_Method::return_type(oop method) {
2354 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2355 return method->obj_field(returnType_offset);
2356 }
2357
2358 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2359 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2360 method->obj_field_put(returnType_offset, value);
2361 }
2362
2363 oop java_lang_reflect_Method::parameter_types(oop method) {
2364 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2365 return method->obj_field(parameterTypes_offset);
2366 }
2367
2368 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2369 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2370 method->obj_field_put(parameterTypes_offset, value);
2371 }
2372
2373 oop java_lang_reflect_Method::exception_types(oop method) {
2374 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2375 return method->obj_field(exceptionTypes_offset);
2376 }
2377
2378 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2379 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2380 method->obj_field_put(exceptionTypes_offset, value);
2381 }
2382
2383 int java_lang_reflect_Method::modifiers(oop method) {
2384 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2385 return method->int_field(modifiers_offset);
2386 }
2387
2388 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2389 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2390 method->int_field_put(modifiers_offset, value);
2391 }
2392
2393 bool java_lang_reflect_Method::has_signature_field() {
2394 return (signature_offset >= 0);
2395 }
2396
2397 oop java_lang_reflect_Method::signature(oop method) {
2398 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2399 assert(has_signature_field(), "signature field must be present");
2400 return method->obj_field(signature_offset);
2401 }
2402
2403 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2404 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2405 assert(has_signature_field(), "signature field must be present");
2406 method->obj_field_put(signature_offset, value);
2407 }
2408
2409 bool java_lang_reflect_Method::has_annotations_field() {
2410 return (annotations_offset >= 0);
2411 }
2412
2413 oop java_lang_reflect_Method::annotations(oop method) {
2414 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2415 assert(has_annotations_field(), "annotations field must be present");
2416 return method->obj_field(annotations_offset);
2417 }
2418
2419 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2420 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2421 assert(has_annotations_field(), "annotations field must be present");
2422 method->obj_field_put(annotations_offset, value);
2423 }
2424
2425 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2426 return (parameter_annotations_offset >= 0);
2427 }
2428
2429 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2430 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2431 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2432 return method->obj_field(parameter_annotations_offset);
2433 }
2434
2435 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2436 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2437 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2438 method->obj_field_put(parameter_annotations_offset, value);
2439 }
2440
2441 bool java_lang_reflect_Method::has_annotation_default_field() {
2442 return (annotation_default_offset >= 0);
2443 }
2444
2445 oop java_lang_reflect_Method::annotation_default(oop method) {
2446 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2447 assert(has_annotation_default_field(), "annotation default field must be present");
2448 return method->obj_field(annotation_default_offset);
2449 }
2450
2451 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2452 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2453 assert(has_annotation_default_field(), "annotation default field must be present");
2454 method->obj_field_put(annotation_default_offset, value);
2455 }
2456
2457 bool java_lang_reflect_Method::has_type_annotations_field() {
2458 return (type_annotations_offset >= 0);
2459 }
2460
2461 oop java_lang_reflect_Method::type_annotations(oop method) {
2462 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2463 assert(has_type_annotations_field(), "type_annotations field must be present");
2464 return method->obj_field(type_annotations_offset);
2465 }
2466
2467 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2468 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2469 assert(has_type_annotations_field(), "type_annotations field must be present");
2470 method->obj_field_put(type_annotations_offset, value);
2471 }
2472
2473 void java_lang_reflect_Constructor::compute_offsets() {
2474 Klass* k = SystemDictionary::reflect_Constructor_klass();
2475 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2476 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2477 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2478 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2479 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2480 // The generic signature and annotations fields are only present in 1.5
2481 signature_offset = -1;
2482 annotations_offset = -1;
2483 parameter_annotations_offset = -1;
2484 type_annotations_offset = -1;
2485 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2486 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2487 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2488 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2489 }
2490
2491 Handle java_lang_reflect_Constructor::create(TRAPS) {
2492 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2493 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2494 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2495 InstanceKlass* ik = InstanceKlass::cast(k);
2496 // Ensure it is initialized
2497 ik->initialize(CHECK_NH);
2498 return ik->allocate_instance_handle(THREAD);
2499 }
2500
2501 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2502 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2503 return reflect->obj_field(clazz_offset);
2504 }
2505
2506 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2507 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2508 reflect->obj_field_put(clazz_offset, value);
2509 }
2510
2511 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2512 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2513 return constructor->obj_field(parameterTypes_offset);
2514 }
2515
2516 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2517 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2518 constructor->obj_field_put(parameterTypes_offset, value);
2519 }
2520
2521 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2522 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2523 return constructor->obj_field(exceptionTypes_offset);
2524 }
2525
2526 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2527 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2528 constructor->obj_field_put(exceptionTypes_offset, value);
2529 }
2530
2531 int java_lang_reflect_Constructor::slot(oop reflect) {
2532 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2533 return reflect->int_field(slot_offset);
2534 }
2535
2536 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2537 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2538 reflect->int_field_put(slot_offset, value);
2539 }
2540
2541 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2542 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2543 return constructor->int_field(modifiers_offset);
2544 }
2545
2546 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2547 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2548 constructor->int_field_put(modifiers_offset, value);
2549 }
2550
2551 bool java_lang_reflect_Constructor::has_signature_field() {
2552 return (signature_offset >= 0);
2553 }
2554
2555 oop java_lang_reflect_Constructor::signature(oop constructor) {
2556 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2557 assert(has_signature_field(), "signature field must be present");
2558 return constructor->obj_field(signature_offset);
2559 }
2560
2561 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2562 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2563 assert(has_signature_field(), "signature field must be present");
2564 constructor->obj_field_put(signature_offset, value);
2565 }
2566
2567 bool java_lang_reflect_Constructor::has_annotations_field() {
2568 return (annotations_offset >= 0);
2569 }
2570
2571 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2572 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2573 assert(has_annotations_field(), "annotations field must be present");
2574 return constructor->obj_field(annotations_offset);
2575 }
2576
2577 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2578 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2579 assert(has_annotations_field(), "annotations field must be present");
2580 constructor->obj_field_put(annotations_offset, value);
2581 }
2582
2583 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2584 return (parameter_annotations_offset >= 0);
2585 }
2586
2587 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2588 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2589 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2590 return method->obj_field(parameter_annotations_offset);
2591 }
2592
2593 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2594 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2595 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2596 method->obj_field_put(parameter_annotations_offset, value);
2597 }
2598
2599 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2600 return (type_annotations_offset >= 0);
2601 }
2602
2603 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2604 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2605 assert(has_type_annotations_field(), "type_annotations field must be present");
2606 return constructor->obj_field(type_annotations_offset);
2607 }
2608
2609 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2610 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2611 assert(has_type_annotations_field(), "type_annotations field must be present");
2612 constructor->obj_field_put(type_annotations_offset, value);
2613 }
2614
2615 void java_lang_reflect_Field::compute_offsets() {
2616 Klass* k = SystemDictionary::reflect_Field_klass();
2617 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2618 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2619 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
2620 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2621 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2622 // The generic signature and annotations fields are only present in 1.5
2623 signature_offset = -1;
2624 annotations_offset = -1;
2625 type_annotations_offset = -1;
2626 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2627 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2628 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2629 }
2630
2631 Handle java_lang_reflect_Field::create(TRAPS) {
2632 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2633 Symbol* name = vmSymbols::java_lang_reflect_Field();
2634 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2635 InstanceKlass* ik = InstanceKlass::cast(k);
2636 // Ensure it is initialized
2637 ik->initialize(CHECK_NH);
2638 return ik->allocate_instance_handle(THREAD);
2639 }
2640
2641 oop java_lang_reflect_Field::clazz(oop reflect) {
2642 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2643 return reflect->obj_field(clazz_offset);
2644 }
2645
2646 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2647 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2648 reflect->obj_field_put(clazz_offset, value);
2649 }
2650
2651 oop java_lang_reflect_Field::name(oop field) {
2652 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2653 return field->obj_field(name_offset);
2654 }
2655
2656 void java_lang_reflect_Field::set_name(oop field, oop value) {
2657 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2658 field->obj_field_put(name_offset, value);
2659 }
2660
2661 oop java_lang_reflect_Field::type(oop field) {
2662 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2663 return field->obj_field(type_offset);
2664 }
2665
2666 void java_lang_reflect_Field::set_type(oop field, oop value) {
2667 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2668 field->obj_field_put(type_offset, value);
2669 }
2670
2671 int java_lang_reflect_Field::slot(oop reflect) {
2672 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2673 return reflect->int_field(slot_offset);
2674 }
2675
2676 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2677 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2678 reflect->int_field_put(slot_offset, value);
2679 }
2680
2681 int java_lang_reflect_Field::modifiers(oop field) {
2682 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2683 return field->int_field(modifiers_offset);
2684 }
2685
2686 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2687 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2688 field->int_field_put(modifiers_offset, value);
2689 }
2690
2691 bool java_lang_reflect_Field::has_signature_field() {
2692 return (signature_offset >= 0);
2693 }
2694
2695 oop java_lang_reflect_Field::signature(oop field) {
2696 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2697 assert(has_signature_field(), "signature field must be present");
2698 return field->obj_field(signature_offset);
2699 }
2700
2701 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2702 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2703 assert(has_signature_field(), "signature field must be present");
2704 field->obj_field_put(signature_offset, value);
2705 }
2706
2707 bool java_lang_reflect_Field::has_annotations_field() {
2708 return (annotations_offset >= 0);
2709 }
2710
2711 oop java_lang_reflect_Field::annotations(oop field) {
2712 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2713 assert(has_annotations_field(), "annotations field must be present");
2714 return field->obj_field(annotations_offset);
2715 }
2716
2717 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2718 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2719 assert(has_annotations_field(), "annotations field must be present");
2720 field->obj_field_put(annotations_offset, value);
2721 }
2722
2723 bool java_lang_reflect_Field::has_type_annotations_field() {
2724 return (type_annotations_offset >= 0);
2725 }
2726
2727 oop java_lang_reflect_Field::type_annotations(oop field) {
2728 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2729 assert(has_type_annotations_field(), "type_annotations field must be present");
2730 return field->obj_field(type_annotations_offset);
2731 }
2732
2733 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2734 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2735 assert(has_type_annotations_field(), "type_annotations field must be present");
2736 field->obj_field_put(type_annotations_offset, value);
2737 }
2738
2739 void reflect_ConstantPool::compute_offsets() {
2740 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2741 // This null test can be removed post beta
2742 if (k != NULL) {
2743 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2744 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2745 }
2746 }
2747
2748 void java_lang_reflect_Parameter::compute_offsets() {
2749 Klass* k = SystemDictionary::reflect_Parameter_klass();
2750 if(NULL != k) {
2751 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2752 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2753 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature());
2754 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature());
2755 }
2756 }
2757
2758 Handle java_lang_reflect_Parameter::create(TRAPS) {
2759 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2760 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2761 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2762 InstanceKlass* ik = InstanceKlass::cast(k);
2763 // Ensure it is initialized
2764 ik->initialize(CHECK_NH);
2765 return ik->allocate_instance_handle(THREAD);
2766 }
2767
2768 oop java_lang_reflect_Parameter::name(oop param) {
2769 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2770 return param->obj_field(name_offset);
2771 }
2772
2773 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2774 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2775 param->obj_field_put(name_offset, value);
2776 }
2777
2778 int java_lang_reflect_Parameter::modifiers(oop param) {
2779 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2780 return param->int_field(modifiers_offset);
2781 }
2782
2783 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2784 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2785 param->int_field_put(modifiers_offset, value);
2786 }
2787
2788 int java_lang_reflect_Parameter::index(oop param) {
2789 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2790 return param->int_field(index_offset);
2791 }
2792
2793 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2794 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2795 param->int_field_put(index_offset, value);
2796 }
2797
2798 oop java_lang_reflect_Parameter::executable(oop param) {
2799 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2800 return param->obj_field(executable_offset);
2801 }
2802
2803 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2804 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2805 param->obj_field_put(executable_offset, value);
2806 }
2807
2808
2809 int java_lang_Module::loader_offset;
2810 int java_lang_Module::name_offset;
2811 int java_lang_Module::_module_entry_offset = -1;
2812
2813 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
2814 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2815
2816 Symbol* name = vmSymbols::java_lang_Module();
2817 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2818 InstanceKlass* ik = InstanceKlass::cast(k);
2819 Handle jlmh = ik->allocate_instance_handle(CHECK_NH);
2820 JavaValue result(T_VOID);
2821 JavaCalls::call_special(&result, jlmh, ik,
2822 vmSymbols::object_initializer_name(),
2823 vmSymbols::java_lang_module_init_signature(),
2824 loader, module_name, CHECK_NH);
2825 return jlmh;
2826 }
2827
2828 void java_lang_Module::compute_offsets() {
2829 Klass* k = SystemDictionary::Module_klass();
2830 if(NULL != k) {
2831 compute_offset(loader_offset, k, vmSymbols::loader_name(), vmSymbols::classloader_signature());
2832 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2833 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2834 }
2835 }
2836
2837
2838 oop java_lang_Module::loader(oop module) {
2839 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2840 return module->obj_field(loader_offset);
2841 }
2842
2843 void java_lang_Module::set_loader(oop module, oop value) {
2844 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2845 module->obj_field_put(loader_offset, value);
2846 }
2847
2848 oop java_lang_Module::name(oop module) {
2849 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2850 return module->obj_field(name_offset);
2851 }
2852
2853 void java_lang_Module::set_name(oop module, oop value) {
2854 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2855 module->obj_field_put(name_offset, value);
2856 }
2857
2858 ModuleEntry* java_lang_Module::module_entry(oop module, TRAPS) {
2859 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
2860 assert(module != NULL, "module can't be null");
2861 assert(module->is_oop(), "module must be oop");
2862
2863 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
2864 if (module_entry == NULL) {
2865 // If the inject field containing the ModuleEntry* is null then return the
2866 // class loader's unnamed module.
2867 oop loader = java_lang_Module::loader(module);
2868 Handle h_loader = Handle(THREAD, loader);
2869 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader, CHECK_NULL);
2870 return loader_cld->unnamed_module();
2871 }
2872 return module_entry;
2873 }
2874
2875 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
2876 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
2877 assert(module != NULL, "module can't be null");
2878 assert(module->is_oop(), "module must be oop");
2879 module->address_field_put(_module_entry_offset, (address)module_entry);
2880 }
2881
2882 Handle reflect_ConstantPool::create(TRAPS) {
2883 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2884 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
2885 // Ensure it is initialized
2886 k->initialize(CHECK_NH);
2887 return k->allocate_instance_handle(THREAD);
2888 }
2889
2890
2891 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2892 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2893 oop mirror = value->pool_holder()->java_mirror();
2894 // Save the mirror to get back the constant pool.
2895 reflect->obj_field_put(_oop_offset, mirror);
2896 }
2897
2898 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
2899 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2900
2901 oop mirror = reflect->obj_field(_oop_offset);
2902 Klass* k = java_lang_Class::as_Klass(mirror);
2903 assert(k->is_instance_klass(), "Must be");
2904
2905 // Get the constant pool back from the klass. Since class redefinition
2906 // merges the new constant pool into the old, this is essentially the
2907 // same constant pool as the original. If constant pool merging is
2908 // no longer done in the future, this will have to change to save
2909 // the original.
2910 return InstanceKlass::cast(k)->constants();
2911 }
2912
2913 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2914 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2915 // This null test can be removed post beta
2916 if (k != NULL) {
2917 compute_offset(_base_offset, k,
2918 vmSymbols::base_name(), vmSymbols::object_signature());
2919 }
2920 }
2921
2922 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2923 Klass* k = SystemDictionary::box_klass(type);
2924 if (k == NULL) return NULL;
2925 InstanceKlass* ik = InstanceKlass::cast(k);
2926 if (!ik->is_initialized()) ik->initialize(CHECK_0);
2927 return ik->allocate_instance(THREAD);
2928 }
2929
2930
2931 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2932 oop box = initialize_and_allocate(type, CHECK_0);
2933 if (box == NULL) return NULL;
2934 switch (type) {
2935 case T_BOOLEAN:
2936 box->bool_field_put(value_offset, value->z);
2937 break;
2938 case T_CHAR:
2939 box->char_field_put(value_offset, value->c);
2940 break;
2941 case T_FLOAT:
2942 box->float_field_put(value_offset, value->f);
2943 break;
2944 case T_DOUBLE:
2945 box->double_field_put(long_value_offset, value->d);
2946 break;
2947 case T_BYTE:
2948 box->byte_field_put(value_offset, value->b);
2949 break;
2950 case T_SHORT:
2951 box->short_field_put(value_offset, value->s);
2952 break;
2953 case T_INT:
2954 box->int_field_put(value_offset, value->i);
2955 break;
2956 case T_LONG:
2957 box->long_field_put(long_value_offset, value->j);
2958 break;
2959 default:
2960 return NULL;
2961 }
2962 return box;
2963 }
2964
2965
2966 BasicType java_lang_boxing_object::basic_type(oop box) {
2967 if (box == NULL) return T_ILLEGAL;
2968 BasicType type = SystemDictionary::box_klass_type(box->klass());
2969 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2970 return T_ILLEGAL;
2971 return type;
2972 }
2973
2974
2975 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2976 BasicType type = SystemDictionary::box_klass_type(box->klass());
2977 switch (type) {
2978 case T_BOOLEAN:
2979 value->z = box->bool_field(value_offset);
2980 break;
2981 case T_CHAR:
2982 value->c = box->char_field(value_offset);
2983 break;
2984 case T_FLOAT:
2985 value->f = box->float_field(value_offset);
2986 break;
2987 case T_DOUBLE:
2988 value->d = box->double_field(long_value_offset);
2989 break;
2990 case T_BYTE:
2991 value->b = box->byte_field(value_offset);
2992 break;
2993 case T_SHORT:
2994 value->s = box->short_field(value_offset);
2995 break;
2996 case T_INT:
2997 value->i = box->int_field(value_offset);
2998 break;
2999 case T_LONG:
3000 value->j = box->long_field(long_value_offset);
3001 break;
3002 default:
3003 return T_ILLEGAL;
3004 } // end switch
3005 return type;
3006 }
3007
3008
3009 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3010 BasicType type = SystemDictionary::box_klass_type(box->klass());
3011 switch (type) {
3012 case T_BOOLEAN:
3013 box->bool_field_put(value_offset, value->z);
3014 break;
3015 case T_CHAR:
3016 box->char_field_put(value_offset, value->c);
3017 break;
3018 case T_FLOAT:
3019 box->float_field_put(value_offset, value->f);
3020 break;
3021 case T_DOUBLE:
3022 box->double_field_put(long_value_offset, value->d);
3023 break;
3024 case T_BYTE:
3025 box->byte_field_put(value_offset, value->b);
3026 break;
3027 case T_SHORT:
3028 box->short_field_put(value_offset, value->s);
3029 break;
3030 case T_INT:
3031 box->int_field_put(value_offset, value->i);
3032 break;
3033 case T_LONG:
3034 box->long_field_put(long_value_offset, value->j);
3035 break;
3036 default:
3037 return T_ILLEGAL;
3038 } // end switch
3039 return type;
3040 }
3041
3042
3043 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3044 switch (type) {
3045 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3046 case T_CHAR: st->print("%d", value->c); break;
3047 case T_BYTE: st->print("%d", value->b); break;
3048 case T_SHORT: st->print("%d", value->s); break;
3049 case T_INT: st->print("%d", value->i); break;
3050 case T_LONG: st->print(INT64_FORMAT, value->j); break;
3051 case T_FLOAT: st->print("%f", value->f); break;
3052 case T_DOUBLE: st->print("%lf", value->d); break;
3053 default: st->print("type %d?", type); break;
3054 }
3055 }
3056
3057 // Support for java_lang_ref_SoftReference
3058
3059 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3060 return ref->long_field(timestamp_offset);
3061 }
3062
3063 jlong java_lang_ref_SoftReference::clock() {
3064 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3065 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
3066 return *offset;
3067 }
3068
3069 void java_lang_ref_SoftReference::set_clock(jlong value) {
3070 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3071 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
3072 *offset = value;
3073 }
3074
3075 // Support for java_lang_invoke_DirectMethodHandle
3076
3077 int java_lang_invoke_DirectMethodHandle::_member_offset;
3078
3079 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3080 oop member_name = NULL;
3081 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
3082 assert(is_dmh, "a DirectMethodHandle oop is expected");
3083 if (is_dmh) {
3084 member_name = dmh->obj_field(member_offset_in_bytes());
3085 }
3086 return member_name;
3087 }
3088
3089 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3090 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
3091 if (klass_oop != NULL) {
3092 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
3093 }
3094 }
3095
3096 // Support for java_lang_invoke_MethodHandle
3097
3098 int java_lang_invoke_MethodHandle::_type_offset;
3099 int java_lang_invoke_MethodHandle::_form_offset;
3100
3101 int java_lang_invoke_MemberName::_clazz_offset;
3102 int java_lang_invoke_MemberName::_name_offset;
3103 int java_lang_invoke_MemberName::_type_offset;
3104 int java_lang_invoke_MemberName::_flags_offset;
3105 int java_lang_invoke_MemberName::_vmtarget_offset;
3106 int java_lang_invoke_MemberName::_vmloader_offset;
3107 int java_lang_invoke_MemberName::_vmindex_offset;
3108
3109 int java_lang_invoke_LambdaForm::_vmentry_offset;
3110
3111 void java_lang_invoke_MethodHandle::compute_offsets() {
3112 Klass* klass_oop = SystemDictionary::MethodHandle_klass();
3113 if (klass_oop != NULL) {
3114 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
3115 compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
3116 }
3117 }
3118
3119 void java_lang_invoke_MemberName::compute_offsets() {
3120 Klass* klass_oop = SystemDictionary::MemberName_klass();
3121 if (klass_oop != NULL) {
3122 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature());
3123 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature());
3124 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature());
3125 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature());
3126 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3127 }
3128 }
3129
3130 void java_lang_invoke_LambdaForm::compute_offsets() {
3131 Klass* klass_oop = SystemDictionary::LambdaForm_klass();
3132 if (klass_oop != NULL) {
3133 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
3134 }
3135 }
3136
3137 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3138 return obj != NULL && is_subclass(obj->klass());
3139 }
3140
3141
3142 oop java_lang_invoke_MethodHandle::type(oop mh) {
3143 return mh->obj_field(_type_offset);
3144 }
3145
3146 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3147 mh->obj_field_put(_type_offset, mtype);
3148 }
3149
3150 oop java_lang_invoke_MethodHandle::form(oop mh) {
3151 assert(_form_offset != 0, "");
3152 return mh->obj_field(_form_offset);
3153 }
3154
3155 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3156 assert(_form_offset != 0, "");
3157 mh->obj_field_put(_form_offset, lform);
3158 }
3159
3160 /// MemberName accessors
3161
3162 oop java_lang_invoke_MemberName::clazz(oop mname) {
3163 assert(is_instance(mname), "wrong type");
3164 return mname->obj_field(_clazz_offset);
3165 }
3166
3167 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3168 assert(is_instance(mname), "wrong type");
3169 mname->obj_field_put(_clazz_offset, clazz);
3170 }
3171
3172 oop java_lang_invoke_MemberName::name(oop mname) {
3173 assert(is_instance(mname), "wrong type");
3174 return mname->obj_field(_name_offset);
3175 }
3176
3177 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3178 assert(is_instance(mname), "wrong type");
3179 mname->obj_field_put(_name_offset, name);
3180 }
3181
3182 oop java_lang_invoke_MemberName::type(oop mname) {
3183 assert(is_instance(mname), "wrong type");
3184 return mname->obj_field(_type_offset);
3185 }
3186
3187 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3188 assert(is_instance(mname), "wrong type");
3189 mname->obj_field_put(_type_offset, type);
3190 }
3191
3192 int java_lang_invoke_MemberName::flags(oop mname) {
3193 assert(is_instance(mname), "wrong type");
3194 return mname->int_field(_flags_offset);
3195 }
3196
3197 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3198 assert(is_instance(mname), "wrong type");
3199 mname->int_field_put(_flags_offset, flags);
3200 }
3201
3202 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
3203 assert(is_instance(mname), "wrong type");
3204 return (Metadata*)mname->address_field(_vmtarget_offset);
3205 }
3206
3207 bool java_lang_invoke_MemberName::is_method(oop mname) {
3208 assert(is_instance(mname), "must be MemberName");
3209 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3210 }
3211
3212 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
3213 assert(is_instance(mname), "wrong type");
3214 // check the type of the vmtarget
3215 oop dependency = NULL;
3216 if (ref != NULL) {
3217 switch (flags(mname) & (MN_IS_METHOD |
3218 MN_IS_CONSTRUCTOR |
3219 MN_IS_FIELD)) {
3220 case MN_IS_METHOD:
3221 case MN_IS_CONSTRUCTOR:
3222 assert(ref->is_method(), "should be a method");
3223 dependency = ((Method*)ref)->method_holder()->java_mirror();
3224 break;
3225 case MN_IS_FIELD:
3226 assert(ref->is_klass(), "should be a class");
3227 dependency = ((Klass*)ref)->java_mirror();
3228 break;
3229 default:
3230 ShouldNotReachHere();
3231 }
3232 }
3233 mname->address_field_put(_vmtarget_offset, (address)ref);
3234 // Add a reference to the loader (actually mirror because anonymous classes will not have
3235 // distinct loaders) to ensure the metadata is kept alive
3236 // This mirror may be different than the one in clazz field.
3237 mname->obj_field_put(_vmloader_offset, dependency);
3238 }
3239
3240 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3241 assert(is_instance(mname), "wrong type");
3242 return (intptr_t) mname->address_field(_vmindex_offset);
3243 }
3244
3245 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3246 assert(is_instance(mname), "wrong type");
3247 mname->address_field_put(_vmindex_offset, (address) index);
3248 }
3249
3250 bool java_lang_invoke_MemberName::equals(oop mn1, oop mn2) {
3251 if (mn1 == mn2) {
3252 return true;
3253 }
3254 return (vmtarget(mn1) == vmtarget(mn2) && flags(mn1) == flags(mn2) &&
3255 vmindex(mn1) == vmindex(mn2) &&
3256 clazz(mn1) == clazz(mn2));
3257 }
3258
3259 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3260 assert(is_instance(lform), "wrong type");
3261 return lform->obj_field(_vmentry_offset);
3262 }
3263
3264
3265 // Support for java_lang_invoke_MethodType
3266
3267 int java_lang_invoke_MethodType::_rtype_offset;
3268 int java_lang_invoke_MethodType::_ptypes_offset;
3269
3270 void java_lang_invoke_MethodType::compute_offsets() {
3271 Klass* k = SystemDictionary::MethodType_klass();
3272 if (k != NULL) {
3273 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
3274 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
3275 }
3276 }
3277
3278 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3279 st->print("(");
3280 objArrayOop pts = ptypes(mt);
3281 for (int i = 0, limit = pts->length(); i < limit; i++) {
3282 java_lang_Class::print_signature(pts->obj_at(i), st);
3283 }
3284 st->print(")");
3285 java_lang_Class::print_signature(rtype(mt), st);
3286 }
3287
3288 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
3289 ResourceMark rm;
3290 stringStream buffer(128);
3291 print_signature(mt, &buffer);
3292 const char* sigstr = buffer.base();
3293 int siglen = (int) buffer.size();
3294 Symbol *name;
3295 if (!intern_if_not_found) {
3296 name = SymbolTable::probe(sigstr, siglen);
3297 } else {
3298 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
3299 }
3300 return name;
3301 }
3302
3303 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3304 if (mt1 == mt2)
3305 return true;
3306 if (rtype(mt1) != rtype(mt2))
3307 return false;
3308 if (ptype_count(mt1) != ptype_count(mt2))
3309 return false;
3310 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3311 if (ptype(mt1, i) != ptype(mt2, i))
3312 return false;
3313 }
3314 return true;
3315 }
3316
3317 oop java_lang_invoke_MethodType::rtype(oop mt) {
3318 assert(is_instance(mt), "must be a MethodType");
3319 return mt->obj_field(_rtype_offset);
3320 }
3321
3322 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3323 assert(is_instance(mt), "must be a MethodType");
3324 return (objArrayOop) mt->obj_field(_ptypes_offset);
3325 }
3326
3327 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3328 return ptypes(mt)->obj_at(idx);
3329 }
3330
3331 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3332 return ptypes(mt)->length();
3333 }
3334
3335 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3336 objArrayOop pts = ptypes(mt);
3337 int count = pts->length();
3338 int slots = 0;
3339 for (int i = 0; i < count; i++) {
3340 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3341 slots += type2size[bt];
3342 }
3343 return slots;
3344 }
3345
3346 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3347 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3348 return type2size[bt];
3349 }
3350
3351
3352 // Support for java_lang_invoke_CallSite
3353
3354 int java_lang_invoke_CallSite::_target_offset;
3355 int java_lang_invoke_CallSite::_context_offset;
3356
3357 void java_lang_invoke_CallSite::compute_offsets() {
3358 Klass* k = SystemDictionary::CallSite_klass();
3359 if (k != NULL) {
3360 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
3361 compute_offset(_context_offset, k, vmSymbols::context_name(),
3362 vmSymbols::java_lang_invoke_MethodHandleNatives_CallSiteContext_signature());
3363 }
3364 }
3365
3366 oop java_lang_invoke_CallSite::context(oop call_site) {
3367 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3368
3369 oop dep_oop = call_site->obj_field(_context_offset);
3370 return dep_oop;
3371 }
3372
3373 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3374
3375 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3376
3377 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3378 Klass* k = SystemDictionary::Context_klass();
3379 if (k != NULL) {
3380 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3381 }
3382 }
3383
3384 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3385 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3386 intptr_t* vmdeps_addr = (intptr_t*)call_site->address_field_addr(_vmdependencies_offset);
3387 DependencyContext dep_ctx(vmdeps_addr);
3388 return dep_ctx;
3389 }
3390
3391 // Support for java_security_AccessControlContext
3392
3393 int java_security_AccessControlContext::_context_offset = 0;
3394 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3395 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3396 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3397
3398 void java_security_AccessControlContext::compute_offsets() {
3399 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3400 fieldDescriptor fd;
3401 InstanceKlass* ik = SystemDictionary::AccessControlContext_klass();
3402
3403 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
3404 fatal("Invalid layout of java.security.AccessControlContext");
3405 }
3406 _context_offset = fd.offset();
3407
3408 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
3409 fatal("Invalid layout of java.security.AccessControlContext");
3410 }
3411 _privilegedContext_offset = fd.offset();
3412
3413 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
3414 fatal("Invalid layout of java.security.AccessControlContext");
3415 }
3416 _isPrivileged_offset = fd.offset();
3417
3418 // The offset may not be present for bootstrapping with older JDK.
3419 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
3420 _isAuthorized_offset = fd.offset();
3421 }
3422 }
3423
3424
3425 bool java_security_AccessControlContext::is_authorized(Handle context) {
3426 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
3427 assert(_isAuthorized_offset != -1, "should be set");
3428 return context->bool_field(_isAuthorized_offset) != 0;
3429 }
3430
3431 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3432 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3433 // Ensure klass is initialized
3434 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3435 // Allocate result
3436 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3437 // Fill in values
3438 result->obj_field_put(_context_offset, context());
3439 result->obj_field_put(_privilegedContext_offset, privileged_context());
3440 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3441 // whitelist AccessControlContexts created by the JVM if present
3442 if (_isAuthorized_offset != -1) {
3443 result->bool_field_put(_isAuthorized_offset, true);
3444 }
3445 return result;
3446 }
3447
3448
3449 // Support for java_lang_ClassLoader
3450
3451 bool java_lang_ClassLoader::offsets_computed = false;
3452 int java_lang_ClassLoader::_loader_data_offset = -1;
3453 int java_lang_ClassLoader::parallelCapable_offset = -1;
3454 int java_lang_ClassLoader::name_offset = -1;
3455 int java_lang_ClassLoader::unnamedModule_offset = -1;
3456
3457 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
3458 assert(loader != NULL && loader->is_oop(), "loader must be oop");
3459 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
3460 }
3461
3462 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
3463 return *java_lang_ClassLoader::loader_data_addr(loader);
3464 }
3465
3466 void java_lang_ClassLoader::compute_offsets() {
3467 assert(!offsets_computed, "offsets should be initialized only once");
3468 offsets_computed = true;
3469
3470 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
3471 Klass* k1 = SystemDictionary::ClassLoader_klass();
3472 compute_optional_offset(parallelCapable_offset,
3473 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
3474
3475 compute_offset(name_offset,
3476 k1, vmSymbols::name_name(), vmSymbols::string_signature());
3477
3478 compute_offset(unnamedModule_offset,
3479 k1, vmSymbols::unnamedModule_name(), vmSymbols::module_signature());
3480
3481 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3482 }
3483
3484 oop java_lang_ClassLoader::parent(oop loader) {
3485 assert(is_instance(loader), "loader must be oop");
3486 return loader->obj_field(parent_offset);
3487 }
3488
3489 oop java_lang_ClassLoader::name(oop loader) {
3490 assert(is_instance(loader), "loader must be oop");
3491 return loader->obj_field(name_offset);
3492 }
3493
3494 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3495 assert(is_instance(loader), "loader must be oop");
3496 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3497 oop acl = loader;
3498 debug_only(jint loop_count = 0);
3499 // This loop taken verbatim from ClassLoader.java:
3500 do {
3501 acl = parent(acl);
3502 if (cl == acl) {
3503 return true;
3504 }
3505 assert(++loop_count > 0, "loop_count overflow");
3506 } while (acl != NULL);
3507 return false;
3508 }
3509
3510 bool java_lang_ClassLoader::is_instance(oop obj) {
3511 return obj != NULL && is_subclass(obj->klass());
3512 }
3513
3514
3515 // For class loader classes, parallelCapable defined
3516 // based on non-null field
3517 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3518 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3519 if (parallelCapable_offset == -1) {
3520 // Default for backward compatibility is false
3521 return false;
3522 }
3523 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3524 }
3525
3526 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3527 // Fix for 4474172; see evaluation for more details
3528 loader = non_reflection_class_loader(loader);
3529
3530 oop cl = SystemDictionary::java_system_loader();
3531 while(cl != NULL) {
3532 if (cl == loader) return true;
3533 cl = parent(cl);
3534 }
3535 return false;
3536 }
3537
3538 // Return true if this is one of the class loaders associated with
3539 // the generated bytecodes for reflection.
3540 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
3541 if (loader != NULL) {
3542 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3543 // This might be null in non-1.4 JDKs
3544 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
3545 }
3546 return false;
3547 }
3548
3549 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3550 // See whether this is one of the class loaders associated with
3551 // the generated bytecodes for reflection, and if so, "magically"
3552 // delegate to its parent to prevent class loading from occurring
3553 // in places where applications using reflection didn't expect it.
3554 if (is_reflection_class_loader(loader)) {
3555 return parent(loader);
3556 }
3557 return loader;
3558 }
3559
3560 oop java_lang_ClassLoader::unnamedModule(oop loader) {
3561 assert(is_instance(loader), "loader must be oop");
3562 return loader->obj_field(unnamedModule_offset);
3563 }
3564
3565 // Support for java_lang_System
3566 int java_lang_System::in_offset_in_bytes() {
3567 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3568 }
3569
3570
3571 int java_lang_System::out_offset_in_bytes() {
3572 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3573 }
3574
3575
3576 int java_lang_System::err_offset_in_bytes() {
3577 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3578 }
3579
3580
3581 bool java_lang_System::has_security_manager() {
3582 InstanceKlass* ik = SystemDictionary::System_klass();
3583 address addr = ik->static_field_addr(static_security_offset);
3584 if (UseCompressedOops) {
3585 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3586 } else {
3587 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3588 }
3589 }
3590
3591 int java_lang_Class::_klass_offset;
3592 int java_lang_Class::_array_klass_offset;
3593 int java_lang_Class::_oop_size_offset;
3594 int java_lang_Class::_static_oop_field_count_offset;
3595 int java_lang_Class::_class_loader_offset;
3596 int java_lang_Class::_module_offset;
3597 int java_lang_Class::_protection_domain_offset;
3598 int java_lang_Class::_component_mirror_offset;
3599 int java_lang_Class::_init_lock_offset;
3600 int java_lang_Class::_signers_offset;
3601 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3602 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
3603 int java_lang_Throwable::backtrace_offset;
3604 int java_lang_Throwable::detailMessage_offset;
3605 int java_lang_Throwable::stackTrace_offset;
3606 int java_lang_Throwable::depth_offset;
3607 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3608 int java_lang_reflect_AccessibleObject::override_offset;
3609 int java_lang_reflect_Method::clazz_offset;
3610 int java_lang_reflect_Method::name_offset;
3611 int java_lang_reflect_Method::returnType_offset;
3612 int java_lang_reflect_Method::parameterTypes_offset;
3613 int java_lang_reflect_Method::exceptionTypes_offset;
3614 int java_lang_reflect_Method::slot_offset;
3615 int java_lang_reflect_Method::modifiers_offset;
3616 int java_lang_reflect_Method::signature_offset;
3617 int java_lang_reflect_Method::annotations_offset;
3618 int java_lang_reflect_Method::parameter_annotations_offset;
3619 int java_lang_reflect_Method::annotation_default_offset;
3620 int java_lang_reflect_Method::type_annotations_offset;
3621 int java_lang_reflect_Constructor::clazz_offset;
3622 int java_lang_reflect_Constructor::parameterTypes_offset;
3623 int java_lang_reflect_Constructor::exceptionTypes_offset;
3624 int java_lang_reflect_Constructor::slot_offset;
3625 int java_lang_reflect_Constructor::modifiers_offset;
3626 int java_lang_reflect_Constructor::signature_offset;
3627 int java_lang_reflect_Constructor::annotations_offset;
3628 int java_lang_reflect_Constructor::parameter_annotations_offset;
3629 int java_lang_reflect_Constructor::type_annotations_offset;
3630 int java_lang_reflect_Field::clazz_offset;
3631 int java_lang_reflect_Field::name_offset;
3632 int java_lang_reflect_Field::type_offset;
3633 int java_lang_reflect_Field::slot_offset;
3634 int java_lang_reflect_Field::modifiers_offset;
3635 int java_lang_reflect_Field::signature_offset;
3636 int java_lang_reflect_Field::annotations_offset;
3637 int java_lang_reflect_Field::type_annotations_offset;
3638 int java_lang_reflect_Parameter::name_offset;
3639 int java_lang_reflect_Parameter::modifiers_offset;
3640 int java_lang_reflect_Parameter::index_offset;
3641 int java_lang_reflect_Parameter::executable_offset;
3642 int java_lang_boxing_object::value_offset;
3643 int java_lang_boxing_object::long_value_offset;
3644 int java_lang_ref_Reference::referent_offset;
3645 int java_lang_ref_Reference::queue_offset;
3646 int java_lang_ref_Reference::next_offset;
3647 int java_lang_ref_Reference::discovered_offset;
3648 int java_lang_ref_Reference::number_of_fake_oop_fields;
3649 int java_lang_ref_SoftReference::timestamp_offset;
3650 int java_lang_ref_SoftReference::static_clock_offset;
3651 int java_lang_ClassLoader::parent_offset;
3652 int java_lang_System::static_in_offset;
3653 int java_lang_System::static_out_offset;
3654 int java_lang_System::static_err_offset;
3655 int java_lang_System::static_security_offset;
3656 int java_lang_StackTraceElement::methodName_offset;
3657 int java_lang_StackTraceElement::fileName_offset;
3658 int java_lang_StackTraceElement::lineNumber_offset;
3659 int java_lang_StackTraceElement::moduleName_offset;
3660 int java_lang_StackTraceElement::moduleVersion_offset;
3661 int java_lang_StackTraceElement::classLoaderName_offset;
3662 int java_lang_StackTraceElement::declaringClass_offset;
3663 int java_lang_StackTraceElement::declaringClassObject_offset;
3664 int java_lang_StackFrameInfo::_declaringClass_offset;
3665 int java_lang_StackFrameInfo::_memberName_offset;
3666 int java_lang_StackFrameInfo::_bci_offset;
3667 int java_lang_StackFrameInfo::_version_offset;
3668 int java_lang_LiveStackFrameInfo::_monitors_offset;
3669 int java_lang_LiveStackFrameInfo::_locals_offset;
3670 int java_lang_LiveStackFrameInfo::_operands_offset;
3671 int java_lang_LiveStackFrameInfo::_mode_offset;
3672 int java_lang_AssertionStatusDirectives::classes_offset;
3673 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3674 int java_lang_AssertionStatusDirectives::packages_offset;
3675 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3676 int java_lang_AssertionStatusDirectives::deflt_offset;
3677 int java_nio_Buffer::_limit_offset;
3678 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3679 int reflect_ConstantPool::_oop_offset;
3680 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3681
3682
3683 // Support for java_lang_StackTraceElement
3684
3685 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3686 element->obj_field_put(fileName_offset, value);
3687 }
3688
3689 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3690 element->obj_field_put(declaringClass_offset, value);
3691 }
3692
3693 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3694 element->obj_field_put(methodName_offset, value);
3695 }
3696
3697 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3698 element->int_field_put(lineNumber_offset, value);
3699 }
3700
3701 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
3702 element->obj_field_put(moduleName_offset, value);
3703 }
3704
3705 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
3706 element->obj_field_put(moduleVersion_offset, value);
3707 }
3708
3709 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
3710 element->obj_field_put(classLoaderName_offset, value);
3711 }
3712
3713 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
3714 element->obj_field_put(declaringClassObject_offset, value);
3715 }
3716
3717 // Support for java_lang_StackFrameInfo
3718 void java_lang_StackFrameInfo::set_declaringClass(oop element, oop value) {
3719 element->obj_field_put(_declaringClass_offset, value);
3720 }
3721
3722 void java_lang_StackFrameInfo::set_version(oop element, short value) {
3723 element->short_field_put(_version_offset, value);
3724 }
3725
3726 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
3727 element->int_field_put(_bci_offset, value);
3728 }
3729
3730 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
3731 element->obj_field_put(_monitors_offset, value);
3732 }
3733
3734 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
3735 element->obj_field_put(_locals_offset, value);
3736 }
3737
3738 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
3739 element->obj_field_put(_operands_offset, value);
3740 }
3741
3742 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
3743 element->int_field_put(_mode_offset, value);
3744 }
3745
3746 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3747
3748 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3749 o->obj_field_put(classes_offset, val);
3750 }
3751
3752 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3753 o->obj_field_put(classEnabled_offset, val);
3754 }
3755
3756 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3757 o->obj_field_put(packages_offset, val);
3758 }
3759
3760 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3761 o->obj_field_put(packageEnabled_offset, val);
3762 }
3763
3764 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3765 o->bool_field_put(deflt_offset, val);
3766 }
3767
3768
3769 // Support for intrinsification of java.nio.Buffer.checkIndex
3770 int java_nio_Buffer::limit_offset() {
3771 return _limit_offset;
3772 }
3773
3774
3775 void java_nio_Buffer::compute_offsets() {
3776 Klass* k = SystemDictionary::nio_Buffer_klass();
3777 assert(k != NULL, "must be loaded in 1.4+");
3778 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3779 }
3780
3781 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3782 if (_owner_offset != 0) return;
3783
3784 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3785 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3786 compute_offset(_owner_offset, k,
3787 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3788 }
3789
3790 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3791 assert(_owner_offset != 0, "Must be initialized");
3792 return obj->obj_field(_owner_offset);
3793 }
3794
3795 // Compute hard-coded offsets
3796 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3797 // are not available to determine the offset_of_static_fields.
3798 void JavaClasses::compute_hard_coded_offsets() {
3799 const int x = heapOopSize;
3800 const int header = instanceOopDesc::base_offset_in_bytes();
3801
3802 // Throwable Class
3803 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
3804 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3805 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3806 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x;
3807
3808 // java_lang_boxing_object
3809 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3810 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3811
3812 // java_lang_ref_Reference:
3813 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3814 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3815 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
3816 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
3817 // Artificial fields for java_lang_ref_Reference
3818 // The first field is for the discovered field added in 1.4
3819 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3820
3821 // java_lang_ref_SoftReference Class
3822 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3823 // Don't multiply static fields because they are always in wordSize units
3824 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3825
3826 // java_lang_ClassLoader
3827 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3828
3829 // java_lang_System
3830 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
3831 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3832 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3833 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3834
3835 // java_lang_StackTraceElement
3836 java_lang_StackTraceElement::declaringClassObject_offset = java_lang_StackTraceElement::hc_declaringClassObject_offset * x + header;
3837 java_lang_StackTraceElement::classLoaderName_offset = java_lang_StackTraceElement::hc_classLoaderName_offset * x + header;
3838 java_lang_StackTraceElement::moduleName_offset = java_lang_StackTraceElement::hc_moduleName_offset * x + header;
3839 java_lang_StackTraceElement::moduleVersion_offset = java_lang_StackTraceElement::hc_moduleVersion_offset * x + header;
3840 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
3841 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3842 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
3843 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3844 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3845 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3846 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3847 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3848 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3849
3850 }
3851
3852
3853 // Compute non-hard-coded field offsets of all the classes in this file
3854 void JavaClasses::compute_offsets() {
3855 // java_lang_Class::compute_offsets was called earlier in bootstrap
3856 java_lang_ClassLoader::compute_offsets();
3857 java_lang_Throwable::compute_offsets();
3858 java_lang_Thread::compute_offsets();
3859 java_lang_ThreadGroup::compute_offsets();
3860 java_lang_invoke_MethodHandle::compute_offsets();
3861 java_lang_invoke_DirectMethodHandle::compute_offsets();
3862 java_lang_invoke_MemberName::compute_offsets();
3863 java_lang_invoke_LambdaForm::compute_offsets();
3864 java_lang_invoke_MethodType::compute_offsets();
3865 java_lang_invoke_CallSite::compute_offsets();
3866 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets();
3867 java_security_AccessControlContext::compute_offsets();
3868 // Initialize reflection classes. The layouts of these classes
3869 // changed with the new reflection implementation in JDK 1.4, and
3870 // since the Universe doesn't know what JDK version it is until this
3871 // point we defer computation of these offsets until now.
3872 java_lang_reflect_AccessibleObject::compute_offsets();
3873 java_lang_reflect_Method::compute_offsets();
3874 java_lang_reflect_Constructor::compute_offsets();
3875 java_lang_reflect_Field::compute_offsets();
3876 java_nio_Buffer::compute_offsets();
3877 reflect_ConstantPool::compute_offsets();
3878 reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3879 java_lang_reflect_Parameter::compute_offsets();
3880 java_lang_Module::compute_offsets();
3881 java_lang_StackFrameInfo::compute_offsets();
3882 java_lang_LiveStackFrameInfo::compute_offsets();
3883
3884 // generated interpreter code wants to know about the offsets we just computed:
3885 AbstractAssembler::update_delayed_values();
3886 }
3887
3888 #ifndef PRODUCT
3889
3890 // These functions exist to assert the validity of hard-coded field offsets to guard
3891 // against changes in the class files
3892
3893 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, 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 InstanceKlass* ik = InstanceKlass::cast(k);
3899 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3900 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3901 if (!ik->find_local_field(f_name, f_sig, &fd)) {
3902 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3903 return false;
3904 }
3905 if (fd.is_static()) {
3906 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3907 return false;
3908 }
3909 if (fd.offset() == hardcoded_offset ) {
3910 return true;
3911 } else {
3912 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3913 klass_name, field_name, hardcoded_offset, fd.offset());
3914 return false;
3915 }
3916 }
3917
3918
3919 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3920 EXCEPTION_MARK;
3921 fieldDescriptor fd;
3922 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3923 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3924 InstanceKlass* ik = InstanceKlass::cast(k);
3925 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3926 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3927 if (!ik->find_local_field(f_name, f_sig, &fd)) {
3928 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3929 return false;
3930 }
3931 if (!fd.is_static()) {
3932 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3933 return false;
3934 }
3935 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3936 return true;
3937 } else {
3938 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());
3939 return false;
3940 }
3941 }
3942
3943
3944 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3945 EXCEPTION_MARK;
3946 fieldDescriptor fd;
3947 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3948 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3949 InstanceKlass* ik = InstanceKlass::cast(k);
3950 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3951 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3952 if (!ik->find_local_field(f_name, f_sig, &fd)) {
3953 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3954 return false;
3955 }
3956 if (!fd.is_static() || !fd.has_initial_value()) {
3957 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3958 return false;
3959 }
3960 if (!fd.initial_value_tag().is_int()) {
3961 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3962 return false;
3963 }
3964 jint field_value = fd.int_initial_value();
3965 if (field_value == hardcoded_constant) {
3966 return true;
3967 } else {
3968 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);
3969 return false;
3970 }
3971 }
3972
3973
3974 // Check the hard-coded field offsets of all the classes in this file
3975
3976 void JavaClasses::check_offsets() {
3977 bool valid = true;
3978
3979 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3980 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3981
3982 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3983 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3984
3985 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3986 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3987
3988 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3989 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3990
3991 // java.lang.String
3992
3993 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[B");
3994 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3995 CHECK_OFFSET("java/lang/String", java_lang_String, coder, "B");
3996
3997 // java.lang.Class
3998
3999 // Fake fields
4000 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
4001 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
4002
4003 // java.lang.Throwable
4004
4005 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
4006 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
4007 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
4008 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, depth, "I");
4009
4010 // Boxed primitive objects (java_lang_boxing_object)
4011
4012 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
4013 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4014 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
4015 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4016 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
4017 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
4018 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
4019 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4020
4021 // java.lang.ClassLoader
4022
4023 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
4024
4025 // java.lang.System
4026
4027 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
4028 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
4029 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
4030 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
4031
4032 // java.lang.StackTraceElement
4033
4034 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClassObject, "Ljava/lang/Class;");
4035 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, classLoaderName, "Ljava/lang/String;");
4036 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, moduleName, "Ljava/lang/String;");
4037 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, moduleVersion, "Ljava/lang/String;");
4038 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
4039 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
4040 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
4041 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
4042
4043 // java.lang.ref.Reference
4044
4045 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4046 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4047 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4048 // Fake field
4049 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4050
4051 // java.lang.ref.SoftReference
4052
4053 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
4054 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
4055
4056 // java.lang.AssertionStatusDirectives
4057 //
4058 // The CheckAssertionStatusDirectives boolean can be removed from here and
4059 // globals.hpp after the AssertionStatusDirectives class has been integrated
4060 // into merlin "for some time." Without it, the vm will fail with early
4061 // merlin builds.
4062
4063 if (CheckAssertionStatusDirectives) {
4064 const char* nm = "java/lang/AssertionStatusDirectives";
4065 const char* sig = "[Ljava/lang/String;";
4066 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
4067 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
4068 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
4069 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
4070 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
4071 }
4072
4073 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4074 }
4075
4076 #endif // PRODUCT
4077
4078 int InjectedField::compute_offset() {
4079 InstanceKlass* ik = InstanceKlass::cast(klass());
4080 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4081 if (!may_be_java && !fs.access_flags().is_internal()) {
4082 // Only look at injected fields
4083 continue;
4084 }
4085 if (fs.name() == name() && fs.signature() == signature()) {
4086 return fs.offset();
4087 }
4088 }
4089 ResourceMark rm;
4090 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)" : "");
4091 #ifndef PRODUCT
4092 ik->print();
4093 tty->print_cr("all fields:");
4094 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4095 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4096 }
4097 #endif //PRODUCT
4098 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
4099 return -1;
4100 }
4101
4102 void javaClasses_init() {
4103 JavaClasses::compute_offsets();
4104 JavaClasses::check_offsets();
4105 FilteredFieldsMap::initialize(); // must be done after computing offsets.
4106 }