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