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