1 /*
2 * Copyright (c) 1997, 2019, 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 "interpreter/linkResolver.hpp"
37 #include "logging/log.hpp"
38 #include "logging/logStream.hpp"
39 #include "memory/heapShared.inline.hpp"
40 #include "memory/metaspaceShared.hpp"
41 #include "memory/oopFactory.hpp"
42 #include "memory/resourceArea.hpp"
43 #include "memory/universe.hpp"
44 #include "oops/fieldStreams.hpp"
45 #include "oops/instanceKlass.hpp"
46 #include "oops/instanceMirrorKlass.hpp"
47 #include "oops/klass.hpp"
48 #include "oops/method.inline.hpp"
49 #include "oops/objArrayOop.inline.hpp"
50 #include "oops/oop.inline.hpp"
51 #include "oops/symbol.hpp"
52 #include "oops/typeArrayOop.inline.hpp"
53 #include "prims/jvmtiExport.hpp"
54 #include "prims/resolvedMethodTable.hpp"
55 #include "runtime/fieldDescriptor.inline.hpp"
56 #include "runtime/frame.inline.hpp"
57 #include "runtime/handles.inline.hpp"
58 #include "runtime/interfaceSupport.inline.hpp"
59 #include "runtime/java.hpp"
60 #include "runtime/javaCalls.hpp"
61 #include "runtime/jniHandles.inline.hpp"
62 #include "runtime/safepoint.hpp"
63 #include "runtime/safepointVerifiers.hpp"
64 #include "runtime/thread.inline.hpp"
65 #include "runtime/vframe.inline.hpp"
66 #include "utilities/align.hpp"
67 #include "utilities/preserveException.hpp"
68 #if INCLUDE_JVMCI
69 #include "jvmci/jvmciJavaClasses.hpp"
70 #endif
71
72 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
73 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
74
75 #if INCLUDE_CDS
76 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \
77 f->do_u4((u4*)&_##name##_offset);
78 #endif
79
80 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
81 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
82
83 InjectedField JavaClasses::_injected_fields[] = {
84 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
85 };
86
87 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
88 return _injected_fields[id].compute_offset();
89 }
90
91 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
92 *field_count = 0;
93
94 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
95 if (sid == vmSymbols::NO_SID) {
96 // Only well known classes can inject fields
97 return NULL;
98 }
99
100 int count = 0;
101 int start = -1;
102
103 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
104 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
105 count++; \
106 if (start == -1) start = klass##_##name##_enum; \
107 }
108 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
109 #undef LOOKUP_INJECTED_FIELD
110
111 if (start != -1) {
112 *field_count = count;
113 return _injected_fields + start;
114 }
115 return NULL;
116 }
117
118
119 // Helpful routine for computing field offsets at run time rather than hardcoding them
120 // Finds local fields only, including static fields. Static field offsets are from the
121 // beginning of the mirror.
122 static void compute_offset(int &dest_offset,
123 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
124 bool is_static = false) {
125 fieldDescriptor fd;
126 if (ik == NULL) {
127 ResourceMark rm;
128 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
129 vm_exit_during_initialization("Invalid layout of well-known class");
130 }
131
132 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
133 ResourceMark rm;
134 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
135 name_symbol->as_C_string(), signature_symbol->as_C_string());
136 #ifndef PRODUCT
137 // Prints all fields and offsets
138 Log(class) lt;
139 LogStream ls(lt.error());
140 ik->print_on(&ls);
141 #endif //PRODUCT
142 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
143 }
144 dest_offset = fd.offset();
145 }
146
147 // Overloading to pass name as a string.
148 static void compute_offset(int& dest_offset, InstanceKlass* ik,
149 const char* name_string, Symbol* signature_symbol,
150 bool is_static = false) {
151 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
152 if (name == NULL) {
153 ResourceMark rm;
154 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
155 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
156 }
157 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
158 }
159
160 int java_lang_String::value_offset = 0;
161 int java_lang_String::hash_offset = 0;
162 int java_lang_String::coder_offset = 0;
163
164 bool java_lang_String::initialized = false;
165
166 bool java_lang_String::is_instance(oop obj) {
167 return is_instance_inlined(obj);
168 }
169
170 #if INCLUDE_CDS
171 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \
172 f->do_u4((u4*)&offset)
173 #endif
174
175 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \
176 compute_offset(offset, klass, name, vmSymbols::signature(), is_static)
177
178 #define STRING_FIELDS_DO(macro) \
179 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
180 macro(hash_offset, k, "hash", int_signature, false); \
181 macro(coder_offset, k, "coder", byte_signature, false)
182
183 void java_lang_String::compute_offsets() {
184 if (initialized) {
185 return;
186 }
187
188 InstanceKlass* k = SystemDictionary::String_klass();
189 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
190
191 initialized = true;
192 }
193
194 #if INCLUDE_CDS
195 void java_lang_String::serialize_offsets(SerializeClosure* f) {
196 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
197 f->do_u4((u4*)&initialized);
198 }
199 #endif
200
201 class CompactStringsFixup : public FieldClosure {
202 private:
203 bool _value;
204
205 public:
206 CompactStringsFixup(bool value) : _value(value) {}
207
208 void do_field(fieldDescriptor* fd) {
209 if (fd->name() == vmSymbols::compact_strings_name()) {
210 oop mirror = fd->field_holder()->java_mirror();
211 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
212 assert(mirror != NULL, "String must have mirror already");
213 mirror->bool_field_put(fd->offset(), _value);
214 }
215 }
216 };
217
218 void java_lang_String::set_compact_strings(bool value) {
219 CompactStringsFixup fix(value);
220 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix);
221 }
222
223 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
224 assert(initialized, "Must be initialized");
225 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
226
227 // Create the String object first, so there's a chance that the String
228 // and the char array it points to end up in the same cache line.
229 oop obj;
230 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
231
232 // Create the char array. The String object must be handlized here
233 // because GC can happen as a result of the allocation attempt.
234 Handle h_obj(THREAD, obj);
235 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
236 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
237
238 // Point the String at the char array
239 obj = h_obj();
240 set_value(obj, buffer);
241 // No need to zero the offset, allocation zero'ed the entire String object
242 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
243 return h_obj;
244 }
245
246 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
247 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
248 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
249 typeArrayOop buffer = value(h_obj());
250 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
251 if (is_latin1) {
252 for (int index = 0; index < length; index++) {
253 buffer->byte_at_put(index, (jbyte)unicode[index]);
254 }
255 } else {
256 for (int index = 0; index < length; index++) {
257 buffer->char_at_put(index, unicode[index]);
258 }
259 }
260
261 #ifdef ASSERT
262 {
263 ResourceMark rm;
264 char* expected = UNICODE::as_utf8(unicode, length);
265 char* actual = as_utf8_string(h_obj());
266 if (strcmp(expected, actual) != 0) {
267 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
268 ShouldNotReachHere();
269 }
270 }
271 #endif
272
273 return h_obj;
274 }
275
276 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
277 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
278 return h_obj();
279 }
280
281 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
282 if (utf8_str == NULL) {
283 return Handle();
284 }
285 bool has_multibyte, is_latin1;
286 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
287 if (!CompactStrings) {
288 has_multibyte = true;
289 is_latin1 = false;
290 }
291
292 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
293 if (length > 0) {
294 if (!has_multibyte) {
295 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
296 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
297 } else if (is_latin1) {
298 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
299 } else {
300 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
301 }
302 }
303
304 #ifdef ASSERT
305 // This check is too strict because the input string is not necessarily valid UTF8.
306 // For example, it may be created with arbitrary content via jni_NewStringUTF.
307 /*
308 {
309 ResourceMark rm;
310 const char* expected = utf8_str;
311 char* actual = as_utf8_string(h_obj());
312 if (strcmp(expected, actual) != 0) {
313 tty->print_cr("String conversion failure: %s --> %s", expected, actual);
314 ShouldNotReachHere();
315 }
316 }
317 */
318 #endif
319
320 return h_obj;
321 }
322
323 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
324 Handle h_obj = create_from_str(utf8_str, CHECK_0);
325 return h_obj();
326 }
327
328 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
329 const char* utf8_str = (char*)symbol->bytes();
330 int utf8_len = symbol->utf8_length();
331
332 bool has_multibyte, is_latin1;
333 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
334 if (!CompactStrings) {
335 has_multibyte = true;
336 is_latin1 = false;
337 }
338
339 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
340 if (length > 0) {
341 if (!has_multibyte) {
342 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
343 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
344 } else if (is_latin1) {
345 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
346 } else {
347 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
348 }
349 }
350
351 #ifdef ASSERT
352 {
353 ResourceMark rm;
354 const char* expected = symbol->as_utf8();
355 char* actual = as_utf8_string(h_obj());
356 if (strncmp(expected, actual, utf8_len) != 0) {
357 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
358 ShouldNotReachHere();
359 }
360 }
361 #endif
362
363 return h_obj;
364 }
365
366 // Converts a C string to a Java String based on current encoding
367 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
368 assert(str != NULL, "bad arguments");
369
370 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
371 static to_java_string_fn_t _to_java_string_fn = NULL;
372
373 if (_to_java_string_fn == NULL) {
374 void *lib_handle = os::native_java_library();
375 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
376 if (_to_java_string_fn == NULL) {
377 fatal("NewStringPlatform missing");
378 }
379 }
380
381 jstring js = NULL;
382 { JavaThread* thread = (JavaThread*)THREAD;
383 assert(thread->is_Java_thread(), "must be java thread");
384 HandleMark hm(thread);
385 ThreadToNativeFromVM ttn(thread);
386 js = (_to_java_string_fn)(thread->jni_environment(), str);
387 }
388 return Handle(THREAD, JNIHandles::resolve(js));
389 }
390
391 // Converts a Java String to a native C string that can be used for
392 // native OS calls.
393 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
394 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
395 static to_platform_string_fn_t _to_platform_string_fn = NULL;
396
397 if (_to_platform_string_fn == NULL) {
398 void *lib_handle = os::native_java_library();
399 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
400 if (_to_platform_string_fn == NULL) {
401 fatal("GetStringPlatformChars missing");
402 }
403 }
404
405 char *native_platform_string;
406 { JavaThread* thread = (JavaThread*)THREAD;
407 assert(thread->is_Java_thread(), "must be java thread");
408 JNIEnv *env = thread->jni_environment();
409 jstring js = (jstring) JNIHandles::make_local(env, java_string());
410 bool is_copy;
411 HandleMark hm(thread);
412 ThreadToNativeFromVM ttn(thread);
413 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
414 assert(is_copy == JNI_TRUE, "is_copy value changed");
415 JNIHandles::destroy_local(js);
416 }
417 return native_platform_string;
418 }
419
420 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
421 oop obj = java_string();
422 // Typical usage is to convert all '/' to '.' in string.
423 typeArrayOop value = java_lang_String::value(obj);
424 int length = java_lang_String::length(obj, value);
425 bool is_latin1 = java_lang_String::is_latin1(obj);
426
427 // First check if any from_char exist
428 int index; // Declared outside, used later
429 for (index = 0; index < length; index++) {
430 jchar c = !is_latin1 ? value->char_at(index) :
431 ((jchar) value->byte_at(index)) & 0xff;
432 if (c == from_char) {
433 break;
434 }
435 }
436 if (index == length) {
437 // No from_char, so do not copy.
438 return java_string;
439 }
440
441 // Check if result string will be latin1
442 bool to_is_latin1 = false;
443
444 // Replacement char must be latin1
445 if (CompactStrings && UNICODE::is_latin1(to_char)) {
446 if (is_latin1) {
447 // Source string is latin1 as well
448 to_is_latin1 = true;
449 } else if (!UNICODE::is_latin1(from_char)) {
450 // We are replacing an UTF16 char. Scan string to
451 // check if result can be latin1 encoded.
452 to_is_latin1 = true;
453 for (index = 0; index < length; index++) {
454 jchar c = value->char_at(index);
455 if (c != from_char && !UNICODE::is_latin1(c)) {
456 to_is_latin1 = false;
457 break;
458 }
459 }
460 }
461 }
462
463 // Create new UNICODE (or byte) buffer. Must handlize value because GC
464 // may happen during String and char array creation.
465 typeArrayHandle h_value(THREAD, value);
466 Handle string = basic_create(length, to_is_latin1, CHECK_NH);
467 typeArrayOop from_buffer = h_value();
468 typeArrayOop to_buffer = java_lang_String::value(string());
469
470 // Copy contents
471 for (index = 0; index < length; index++) {
472 jchar c = (!is_latin1) ? from_buffer->char_at(index) :
473 ((jchar) from_buffer->byte_at(index)) & 0xff;
474 if (c == from_char) {
475 c = to_char;
476 }
477 if (!to_is_latin1) {
478 to_buffer->char_at_put(index, c);
479 } else {
480 to_buffer->byte_at_put(index, (jbyte) c);
481 }
482 }
483 return string;
484 }
485
486 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
487 typeArrayOop value = java_lang_String::value(java_string);
488 length = java_lang_String::length(java_string, value);
489 bool is_latin1 = java_lang_String::is_latin1(java_string);
490
491 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
492 if (result != NULL) {
493 if (!is_latin1) {
494 for (int index = 0; index < length; index++) {
495 result[index] = value->char_at(index);
496 }
497 } else {
498 for (int index = 0; index < length; index++) {
499 result[index] = ((jchar) value->byte_at(index)) & 0xff;
500 }
501 }
502 } else {
503 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
504 }
505 return result;
506 }
507
508 unsigned int java_lang_String::hash_code(oop java_string) {
509 typeArrayOop value = java_lang_String::value(java_string);
510 int length = java_lang_String::length(java_string, value);
511 // Zero length string will hash to zero with String.hashCode() function.
512 if (length == 0) return 0;
513
514 bool is_latin1 = java_lang_String::is_latin1(java_string);
515
516 if (is_latin1) {
517 return java_lang_String::hash_code(value->byte_at_addr(0), length);
518 } else {
519 return java_lang_String::hash_code(value->char_at_addr(0), length);
520 }
521 }
522
523 char* java_lang_String::as_quoted_ascii(oop java_string) {
524 typeArrayOop value = java_lang_String::value(java_string);
525 int length = java_lang_String::length(java_string, value);
526 bool is_latin1 = java_lang_String::is_latin1(java_string);
527
528 if (length == 0) return NULL;
529
530 char* result;
531 int result_length;
532 if (!is_latin1) {
533 jchar* base = value->char_at_addr(0);
534 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
535 result = NEW_RESOURCE_ARRAY(char, result_length);
536 UNICODE::as_quoted_ascii(base, length, result, result_length);
537 } else {
538 jbyte* base = value->byte_at_addr(0);
539 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
540 result = NEW_RESOURCE_ARRAY(char, result_length);
541 UNICODE::as_quoted_ascii(base, length, result, result_length);
542 }
543 assert(result_length >= length + 1, "must not be shorter");
544 assert(result_length == (int)strlen(result) + 1, "must match");
545 return result;
546 }
547
548 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) {
549 typeArrayOop value = java_lang_String::value(java_string);
550 int length = java_lang_String::length(java_string, value);
551 bool is_latin1 = java_lang_String::is_latin1(java_string);
552 if (!is_latin1) {
553 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
554 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
555 return sym;
556 } else {
557 ResourceMark rm;
558 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
559 const char* base = UNICODE::as_utf8(position, length);
560 Symbol* sym = SymbolTable::lookup(base, length, THREAD);
561 return sym;
562 }
563 }
564
565 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
566 typeArrayOop value = java_lang_String::value(java_string);
567 int length = java_lang_String::length(java_string, value);
568 bool is_latin1 = java_lang_String::is_latin1(java_string);
569 if (!is_latin1) {
570 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
571 return SymbolTable::probe_unicode(base, length);
572 } else {
573 ResourceMark rm;
574 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
575 const char* base = UNICODE::as_utf8(position, length);
576 return SymbolTable::probe(base, length);
577 }
578 }
579
580 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
581 assert(oopDesc::equals(value, java_lang_String::value(java_string)),
582 "value must be same as java_lang_String::value(java_string)");
583 int length = java_lang_String::length(java_string, value);
584 if (length == 0) {
585 return 0;
586 }
587 if (!java_lang_String::is_latin1(java_string)) {
588 return UNICODE::utf8_length(value->char_at_addr(0), length);
589 } else {
590 return UNICODE::utf8_length(value->byte_at_addr(0), length);
591 }
592 }
593
594 int java_lang_String::utf8_length(oop java_string) {
595 typeArrayOop value = java_lang_String::value(java_string);
596 return utf8_length(java_string, value);
597 }
598
599 char* java_lang_String::as_utf8_string(oop java_string) {
600 typeArrayOop value = java_lang_String::value(java_string);
601 int length = java_lang_String::length(java_string, value);
602 bool is_latin1 = java_lang_String::is_latin1(java_string);
603 if (!is_latin1) {
604 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
605 return UNICODE::as_utf8(position, length);
606 } else {
607 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
608 return UNICODE::as_utf8(position, length);
609 }
610 }
611
612 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) {
613 assert(oopDesc::equals(value, java_lang_String::value(java_string)),
614 "value must be same as java_lang_String::value(java_string)");
615 int length = java_lang_String::length(java_string, value);
616 bool is_latin1 = java_lang_String::is_latin1(java_string);
617 if (!is_latin1) {
618 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
619 return UNICODE::as_utf8(position, length, buf, buflen);
620 } else {
621 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
622 return UNICODE::as_utf8(position, length, buf, buflen);
623 }
624 }
625
626 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
627 typeArrayOop value = java_lang_String::value(java_string);
628 return as_utf8_string(java_string, value, buf, buflen);
629 }
630
631 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
632 typeArrayOop value = java_lang_String::value(java_string);
633 bool is_latin1 = java_lang_String::is_latin1(java_string);
634 assert(start + len <= java_lang_String::length(java_string), "just checking");
635 if (!is_latin1) {
636 jchar* position = value->char_at_addr(start);
637 return UNICODE::as_utf8(position, len);
638 } else {
639 jbyte* position = value->byte_at_addr(start);
640 return UNICODE::as_utf8(position, len);
641 }
642 }
643
644 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) {
645 assert(oopDesc::equals(value, java_lang_String::value(java_string)),
646 "value must be same as java_lang_String::value(java_string)");
647 assert(start + len <= java_lang_String::length(java_string), "just checking");
648 bool is_latin1 = java_lang_String::is_latin1(java_string);
649 if (!is_latin1) {
650 jchar* position = value->char_at_addr(start);
651 return UNICODE::as_utf8(position, len, buf, buflen);
652 } else {
653 jbyte* position = value->byte_at_addr(start);
654 return UNICODE::as_utf8(position, len, buf, buflen);
655 }
656 }
657
658 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
659 assert(java_string->klass() == SystemDictionary::String_klass(),
660 "must be java_string");
661 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
662 int length = java_lang_String::length(java_string, value);
663 if (length != len) {
664 return false;
665 }
666 bool is_latin1 = java_lang_String::is_latin1(java_string);
667 if (!is_latin1) {
668 for (int i = 0; i < len; i++) {
669 if (value->char_at(i) != chars[i]) {
670 return false;
671 }
672 }
673 } else {
674 for (int i = 0; i < len; i++) {
675 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
676 return false;
677 }
678 }
679 }
680 return true;
681 }
682
683 bool java_lang_String::equals(oop str1, oop str2) {
684 assert(str1->klass() == SystemDictionary::String_klass(),
685 "must be java String");
686 assert(str2->klass() == SystemDictionary::String_klass(),
687 "must be java String");
688 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
689 int length1 = java_lang_String::length(str1, value1);
690 bool is_latin1 = java_lang_String::is_latin1(str1);
691 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
692 int length2 = java_lang_String::length(str2, value2);
693 bool is_latin2 = java_lang_String::is_latin1(str2);
694
695 if ((length1 != length2) || (is_latin1 != is_latin2)) {
696 // Strings of different size or with different
697 // coders are never equal.
698 return false;
699 }
700 int blength1 = value1->length();
701 for (int i = 0; i < blength1; i++) {
702 if (value1->byte_at(i) != value2->byte_at(i)) {
703 return false;
704 }
705 }
706 return true;
707 }
708
709 void java_lang_String::print(oop java_string, outputStream* st) {
710 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
711 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
712
713 if (value == NULL) {
714 // This can happen if, e.g., printing a String
715 // object before its initializer has been called
716 st->print("NULL");
717 return;
718 }
719
720 int length = java_lang_String::length(java_string, value);
721 bool is_latin1 = java_lang_String::is_latin1(java_string);
722
723 st->print("\"");
724 for (int index = 0; index < length; index++) {
725 st->print("%c", (!is_latin1) ? value->char_at(index) :
726 ((jchar) value->byte_at(index)) & 0xff );
727 }
728 st->print("\"");
729 }
730
731
732 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
733 assert(mirror.not_null() && fd->is_static(), "just checking");
734 if (fd->has_initial_value()) {
735 BasicType t = fd->field_type();
736 switch (t) {
737 case T_BYTE:
738 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
739 break;
740 case T_BOOLEAN:
741 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
742 break;
743 case T_CHAR:
744 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
745 break;
746 case T_SHORT:
747 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
748 break;
749 case T_INT:
750 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
751 break;
752 case T_FLOAT:
753 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
754 break;
755 case T_DOUBLE:
756 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
757 break;
758 case T_LONG:
759 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
760 break;
761 case T_OBJECT:
762 {
763 assert(fd->signature() == vmSymbols::string_signature(),
764 "just checking");
765 if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) {
766 // Archive the String field and update the pointer.
767 oop s = mirror()->obj_field(fd->offset());
768 oop archived_s = StringTable::create_archived_string(s, CHECK);
769 mirror()->obj_field_put(fd->offset(), archived_s);
770 } else {
771 oop string = fd->string_initial_value(CHECK);
772 mirror()->obj_field_put(fd->offset(), string);
773 }
774 }
775 break;
776 default:
777 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
778 "Illegal ConstantValue attribute in class file");
779 }
780 }
781 }
782
783
784 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
785 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
786
787 // If the offset was read from the shared archive, it was fixed up already
788 if (!k->is_shared()) {
789 if (k->is_instance_klass()) {
790 // During bootstrap, java.lang.Class wasn't loaded so static field
791 // offsets were computed without the size added it. Go back and
792 // update all the static field offsets to included the size.
793 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) {
794 if (fs.access_flags().is_static()) {
795 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
796 fs.set_offset(real_offset);
797 }
798 }
799 }
800 }
801
802 if (k->is_shared() && k->has_raw_archived_mirror()) {
803 if (HeapShared::open_archive_heap_region_mapped()) {
804 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
805 assert(present, "Missing archived mirror for %s", k->external_name());
806 return;
807 } else {
808 k->set_java_mirror_handle(NULL);
809 k->clear_has_raw_archived_mirror();
810 }
811 }
812 create_mirror(k, Handle(), Handle(), Handle(), CHECK);
813 }
814
815 void java_lang_Class::initialize_mirror_fields(Klass* k,
816 Handle mirror,
817 Handle protection_domain,
818 TRAPS) {
819 // Allocate a simple java object for a lock.
820 // This needs to be a java object because during class initialization
821 // it can be held across a java call.
822 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
823 set_init_lock(mirror(), r);
824
825 // Set protection domain also
826 set_protection_domain(mirror(), protection_domain());
827
828 // Initialize static fields
829 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
830 }
831
832 // Set the java.lang.Module module field in the java_lang_Class mirror
833 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
834 if (module.is_null()) {
835 // During startup, the module may be NULL only if java.base has not been defined yet.
836 // Put the class on the fixup_module_list to patch later when the java.lang.Module
837 // for java.base is known.
838 assert(!Universe::is_module_initialized(), "Incorrect java.lang.Module pre module system initialization");
839
840 bool javabase_was_defined = false;
841 {
842 MutexLocker m1(Module_lock, THREAD);
843 // Keep list of classes needing java.base module fixup
844 if (!ModuleEntryTable::javabase_defined()) {
845 assert(k->java_mirror() != NULL, "Class's mirror is null");
846 k->class_loader_data()->inc_keep_alive();
847 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized");
848 fixup_module_field_list()->push(k);
849 } else {
850 javabase_was_defined = true;
851 }
852 }
853
854 // If java.base was already defined then patch this particular class with java.base.
855 if (javabase_was_defined) {
856 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
857 assert(javabase_entry != NULL && javabase_entry->module() != NULL,
858 "Setting class module field, " JAVA_BASE_NAME " should be defined");
859 Handle javabase_handle(THREAD, javabase_entry->module());
860 set_module(mirror(), javabase_handle());
861 }
862 } else {
863 assert(Universe::is_module_initialized() ||
864 (ModuleEntryTable::javabase_defined() &&
865 (oopDesc::equals(module(), ModuleEntryTable::javabase_moduleEntry()->module()))),
866 "Incorrect java.lang.Module specification while creating mirror");
867 set_module(mirror(), module());
868 }
869 }
870
871 // Statically allocate fixup lists because they always get created.
872 void java_lang_Class::allocate_fixup_lists() {
873 GrowableArray<Klass*>* mirror_list =
874 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
875 set_fixup_mirror_list(mirror_list);
876
877 GrowableArray<Klass*>* module_list =
878 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
879 set_fixup_module_field_list(module_list);
880 }
881
882 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
883 Handle module, Handle protection_domain, TRAPS) {
884 assert(k != NULL, "Use create_basic_type_mirror for primitive types");
885 assert(k->java_mirror() == NULL, "should only assign mirror once");
886
887 // Use this moment of initialization to cache modifier_flags also,
888 // to support Class.getModifiers(). Instance classes recalculate
889 // the cached flags after the class file is parsed, but before the
890 // class is put into the system dictionary.
891 int computed_modifiers = k->compute_modifier_flags(CHECK);
892 k->set_modifier_flags(computed_modifiers);
893 // Class_klass has to be loaded because it is used to allocate
894 // the mirror.
895 if (SystemDictionary::Class_klass_loaded()) {
896 // Allocate mirror (java.lang.Class instance)
897 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
898 Handle mirror(THREAD, mirror_oop);
899 Handle comp_mirror;
900
901 // Setup indirection from mirror->klass
902 java_lang_Class::set_klass(mirror(), k);
903
904 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
905 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
906
907 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
908
909 // It might also have a component mirror. This mirror must already exist.
910 if (k->is_array_klass()) {
911 if (k->is_typeArray_klass()) {
912 BasicType type = TypeArrayKlass::cast(k)->element_type();
913 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
914 } else {
915 assert(k->is_objArray_klass(), "Must be");
916 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
917 assert(element_klass != NULL, "Must have an element klass");
918 comp_mirror = Handle(THREAD, element_klass->java_mirror());
919 }
920 assert(comp_mirror() != NULL, "must have a mirror");
921
922 // Two-way link between the array klass and its component mirror:
923 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
924 set_component_mirror(mirror(), comp_mirror());
925 // See below for ordering dependencies between field array_klass in component mirror
926 // and java_mirror in this klass.
927 } else {
928 assert(k->is_instance_klass(), "Must be");
929
930 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
931 if (HAS_PENDING_EXCEPTION) {
932 // If any of the fields throws an exception like OOM remove the klass field
933 // from the mirror so GC doesn't follow it after the klass has been deallocated.
934 // This mirror looks like a primitive type, which logically it is because it
935 // it represents no class.
936 java_lang_Class::set_klass(mirror(), NULL);
937 return;
938 }
939 }
940
941 // set the classLoader field in the java_lang_Class instance
942 assert(oopDesc::equals(class_loader(), k->class_loader()), "should be same");
943 set_class_loader(mirror(), class_loader());
944
945 // Setup indirection from klass->mirror
946 // after any exceptions can happen during allocations.
947 k->set_java_mirror(mirror);
948
949 // Set the module field in the java_lang_Class instance. This must be done
950 // after the mirror is set.
951 set_mirror_module_field(k, mirror, module, THREAD);
952
953 if (comp_mirror() != NULL) {
954 // Set after k->java_mirror() is published, because compiled code running
955 // concurrently doesn't expect a k to have a null java_mirror.
956 release_set_array_klass(comp_mirror(), k);
957 }
958 } else {
959 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
960 fixup_mirror_list()->push(k);
961 }
962 }
963
964 #if INCLUDE_CDS_JAVA_HEAP
965 // Clears mirror fields. Static final fields with initial values are reloaded
966 // from constant pool. The object identity hash is in the object header and is
967 // not affected.
968 class ResetMirrorField: public FieldClosure {
969 private:
970 Handle _m;
971
972 public:
973 ResetMirrorField(Handle mirror) : _m(mirror) {}
974
975 void do_field(fieldDescriptor* fd) {
976 assert(DumpSharedSpaces, "dump time only");
977 assert(_m.not_null(), "Mirror cannot be NULL");
978
979 if (fd->is_static() && fd->has_initial_value()) {
980 initialize_static_field(fd, _m, Thread::current());
981 return;
982 }
983
984 BasicType ft = fd->field_type();
985 switch (ft) {
986 case T_BYTE:
987 _m()->byte_field_put(fd->offset(), 0);
988 break;
989 case T_CHAR:
990 _m()->char_field_put(fd->offset(), 0);
991 break;
992 case T_DOUBLE:
993 _m()->double_field_put(fd->offset(), 0);
994 break;
995 case T_FLOAT:
996 _m()->float_field_put(fd->offset(), 0);
997 break;
998 case T_INT:
999 _m()->int_field_put(fd->offset(), 0);
1000 break;
1001 case T_LONG:
1002 _m()->long_field_put(fd->offset(), 0);
1003 break;
1004 case T_SHORT:
1005 _m()->short_field_put(fd->offset(), 0);
1006 break;
1007 case T_BOOLEAN:
1008 _m()->bool_field_put(fd->offset(), false);
1009 break;
1010 case T_ARRAY:
1011 case T_OBJECT: {
1012 // It might be useful to cache the String field, but
1013 // for now just clear out any reference field
1014 oop o = _m()->obj_field(fd->offset());
1015 _m()->obj_field_put(fd->offset(), NULL);
1016 break;
1017 }
1018 default:
1019 ShouldNotReachHere();
1020 break;
1021 }
1022 }
1023 };
1024
1025 void java_lang_Class::archive_basic_type_mirrors(TRAPS) {
1026 assert(HeapShared::is_heap_object_archiving_allowed(),
1027 "HeapShared::is_heap_object_archiving_allowed() must be true");
1028
1029 for (int t = 0; t <= T_VOID; t++) {
1030 oop m = Universe::_mirrors[t];
1031 if (m != NULL) {
1032 // Update the field at _array_klass_offset to point to the relocated array klass.
1033 oop archived_m = HeapShared::archive_heap_object(m, THREAD);
1034 assert(archived_m != NULL, "sanity");
1035 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset));
1036 assert(ak != NULL || t == T_VOID, "should not be NULL");
1037 if (ak != NULL) {
1038 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak);
1039 archived_m->metadata_field_put(_array_klass_offset, reloc_ak);
1040 }
1041
1042 // Clear the fields. Just to be safe
1043 Klass *k = m->klass();
1044 Handle archived_mirror_h(THREAD, archived_m);
1045 ResetMirrorField reset(archived_mirror_h);
1046 InstanceKlass::cast(k)->do_nonstatic_fields(&reset);
1047
1048 log_trace(cds, heap, mirror)(
1049 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1050 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m));
1051
1052 Universe::_mirrors[t] = archived_m;
1053 }
1054 }
1055
1056 assert(Universe::_mirrors[T_INT] != NULL &&
1057 Universe::_mirrors[T_FLOAT] != NULL &&
1058 Universe::_mirrors[T_DOUBLE] != NULL &&
1059 Universe::_mirrors[T_BYTE] != NULL &&
1060 Universe::_mirrors[T_BOOLEAN] != NULL &&
1061 Universe::_mirrors[T_CHAR] != NULL &&
1062 Universe::_mirrors[T_LONG] != NULL &&
1063 Universe::_mirrors[T_SHORT] != NULL &&
1064 Universe::_mirrors[T_VOID] != NULL, "sanity");
1065
1066 Universe::set_int_mirror(Universe::_mirrors[T_INT]);
1067 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]);
1068 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]);
1069 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]);
1070 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]);
1071 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]);
1072 Universe::set_long_mirror(Universe::_mirrors[T_LONG]);
1073 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]);
1074 Universe::set_void_mirror(Universe::_mirrors[T_VOID]);
1075 }
1076
1077 //
1078 // After the mirror object is successfully archived, the archived
1079 // klass is set with _has_archived_raw_mirror flag.
1080 //
1081 // The _has_archived_raw_mirror flag is cleared at runtime when the
1082 // archived mirror is restored. If archived java heap data cannot
1083 // be used at runtime, new mirror object is created for the shared
1084 // class. The _has_archived_raw_mirror is cleared also during the process.
1085 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) {
1086 assert(HeapShared::is_heap_object_archiving_allowed(),
1087 "HeapShared::is_heap_object_archiving_allowed() must be true");
1088
1089 // Mirror is already archived
1090 if (k->has_raw_archived_mirror()) {
1091 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror");
1092 return k->archived_java_mirror_raw();
1093 }
1094
1095 // No mirror
1096 oop mirror = k->java_mirror();
1097 if (mirror == NULL) {
1098 return NULL;
1099 }
1100
1101 if (k->is_instance_klass()) {
1102 InstanceKlass *ik = InstanceKlass::cast(k);
1103 assert(ik->signers() == NULL, "class with signer should have been excluded");
1104
1105 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() ||
1106 ik->is_shared_app_class())) {
1107 // Archiving mirror for classes from non-builtin loaders is not
1108 // supported. Clear the _java_mirror within the archived class.
1109 k->set_java_mirror_handle(NULL);
1110 return NULL;
1111 }
1112 }
1113
1114 // Now start archiving the mirror object
1115 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD);
1116 if (archived_mirror == NULL) {
1117 return NULL;
1118 }
1119
1120 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD);
1121 if (archived_mirror == NULL) {
1122 return NULL;
1123 }
1124
1125 k->set_archived_java_mirror_raw(archived_mirror);
1126
1127 k->set_has_raw_archived_mirror();
1128
1129 ResourceMark rm;
1130 log_trace(cds, heap, mirror)(
1131 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1132 k->external_name(), p2i(mirror), p2i(archived_mirror));
1133
1134 return archived_mirror;
1135 }
1136
1137 // The process is based on create_mirror().
1138 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror,
1139 oop archived_mirror,
1140 Thread *THREAD) {
1141 // Clear nonstatic fields in archived mirror. Some of the fields will be set
1142 // to archived metadata and objects below.
1143 Klass *c = archived_mirror->klass();
1144 Handle archived_mirror_h(THREAD, archived_mirror);
1145 ResetMirrorField reset(archived_mirror_h);
1146 InstanceKlass::cast(c)->do_nonstatic_fields(&reset);
1147
1148 if (k->is_array_klass()) {
1149 oop archived_comp_mirror;
1150 if (k->is_typeArray_klass()) {
1151 // The primitive type mirrors are already archived. Get the archived mirror.
1152 oop comp_mirror = java_lang_Class::component_mirror(mirror);
1153 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror);
1154 assert(archived_comp_mirror != NULL, "Must be");
1155 } else {
1156 assert(k->is_objArray_klass(), "Must be");
1157 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1158 assert(element_klass != NULL, "Must have an element klass");
1159 archived_comp_mirror = archive_mirror(element_klass, THREAD);
1160 if (archived_comp_mirror == NULL) {
1161 return NULL;
1162 }
1163 }
1164 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror);
1165 } else {
1166 assert(k->is_instance_klass(), "Must be");
1167
1168 // Reset local static fields in the mirror
1169 InstanceKlass::cast(k)->do_local_static_fields(&reset);
1170
1171 java_lang_Class:set_init_lock(archived_mirror, NULL);
1172
1173 set_protection_domain(archived_mirror, NULL);
1174 }
1175
1176 // clear class loader and mirror_module_field
1177 set_class_loader(archived_mirror, NULL);
1178 set_module(archived_mirror, NULL);
1179
1180 // The archived mirror's field at _klass_offset is still pointing to the original
1181 // klass. Updated the field in the archived mirror to point to the relocated
1182 // klass in the archive.
1183 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror));
1184 log_debug(cds, heap, mirror)(
1185 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1186 p2i(as_Klass(mirror)), p2i(reloc_k));
1187 archived_mirror->metadata_field_put(_klass_offset, reloc_k);
1188
1189 // The field at _array_klass_offset is pointing to the original one dimension
1190 // higher array klass if exists. Relocate the pointer.
1191 Klass *arr = array_klass_acquire(mirror);
1192 if (arr != NULL) {
1193 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr);
1194 log_debug(cds, heap, mirror)(
1195 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1196 p2i(arr), p2i(reloc_arr));
1197 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr);
1198 }
1199 return archived_mirror;
1200 }
1201
1202 // Returns true if the mirror is updated, false if no archived mirror
1203 // data is present. After the archived mirror object is restored, the
1204 // shared klass' _has_raw_archived_mirror flag is cleared.
1205 bool java_lang_Class::restore_archived_mirror(Klass *k,
1206 Handle class_loader, Handle module,
1207 Handle protection_domain, TRAPS) {
1208 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1209 // see more details in SystemDictionary::resolve_well_known_classes().
1210 if (!SystemDictionary::Class_klass_loaded()) {
1211 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
1212 fixup_mirror_list()->push(k);
1213 return true;
1214 }
1215
1216 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow());
1217
1218 if (m == NULL) {
1219 return false;
1220 }
1221
1222 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1223
1224 // mirror is archived, restore
1225 assert(HeapShared::is_archived_object(m), "must be archived mirror object");
1226 Handle mirror(THREAD, m);
1227
1228 if (!k->is_array_klass()) {
1229 // - local static final fields with initial values were initialized at dump time
1230
1231 // create the init_lock
1232 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1233 set_init_lock(mirror(), r);
1234
1235 if (protection_domain.not_null()) {
1236 set_protection_domain(mirror(), protection_domain());
1237 }
1238 }
1239
1240 assert(class_loader() == k->class_loader(), "should be same");
1241 if (class_loader.not_null()) {
1242 set_class_loader(mirror(), class_loader());
1243 }
1244
1245 k->set_java_mirror(mirror);
1246 k->clear_has_raw_archived_mirror();
1247
1248 set_mirror_module_field(k, mirror, module, THREAD);
1249
1250 ResourceMark rm;
1251 log_trace(cds, heap, mirror)(
1252 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1253
1254 return true;
1255 }
1256 #endif // INCLUDE_CDS_JAVA_HEAP
1257
1258 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1259 assert(_module_offset != 0, "must have been computed already");
1260 java_lang_Class::set_module(k->java_mirror(), module());
1261 }
1262
1263 int java_lang_Class::oop_size(oop java_class) {
1264 assert(_oop_size_offset != 0, "must be set");
1265 int size = java_class->int_field(_oop_size_offset);
1266 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1267 return size;
1268 }
1269
1270
1271 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) {
1272 assert(_oop_size_offset != 0, "must be set");
1273 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1274 *(int*)(((char*)java_class) + _oop_size_offset) = size;
1275 }
1276
1277 int java_lang_Class::static_oop_field_count(oop java_class) {
1278 assert(_static_oop_field_count_offset != 0, "must be set");
1279 return java_class->int_field(_static_oop_field_count_offset);
1280 }
1281
1282 int java_lang_Class::static_oop_field_count_raw(oop java_class) {
1283 assert(_static_oop_field_count_offset != 0, "must be set");
1284 return java_class->int_field_raw(_static_oop_field_count_offset);
1285 }
1286
1287 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1288 assert(_static_oop_field_count_offset != 0, "must be set");
1289 java_class->int_field_put(_static_oop_field_count_offset, size);
1290 }
1291
1292 oop java_lang_Class::protection_domain(oop java_class) {
1293 assert(_protection_domain_offset != 0, "must be set");
1294 return java_class->obj_field(_protection_domain_offset);
1295 }
1296 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1297 assert(_protection_domain_offset != 0, "must be set");
1298 java_class->obj_field_put(_protection_domain_offset, pd);
1299 }
1300
1301 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1302 assert(_component_mirror_offset != 0, "must be set");
1303 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1304 }
1305 oop java_lang_Class::component_mirror(oop java_class) {
1306 assert(_component_mirror_offset != 0, "must be set");
1307 return java_class->obj_field(_component_mirror_offset);
1308 }
1309
1310 oop java_lang_Class::init_lock(oop java_class) {
1311 assert(_init_lock_offset != 0, "must be set");
1312 return java_class->obj_field(_init_lock_offset);
1313 }
1314 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1315 assert(_init_lock_offset != 0, "must be set");
1316 java_class->obj_field_put(_init_lock_offset, init_lock);
1317 }
1318
1319 objArrayOop java_lang_Class::signers(oop java_class) {
1320 assert(_signers_offset != 0, "must be set");
1321 return (objArrayOop)java_class->obj_field(_signers_offset);
1322 }
1323 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1324 assert(_signers_offset != 0, "must be set");
1325 java_class->obj_field_put(_signers_offset, (oop)signers);
1326 }
1327
1328
1329 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1330 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
1331 if (_class_loader_offset != 0) {
1332 java_class->obj_field_put(_class_loader_offset, loader);
1333 }
1334 }
1335
1336 oop java_lang_Class::class_loader(oop java_class) {
1337 assert(_class_loader_offset != 0, "must be set");
1338 return java_class->obj_field(_class_loader_offset);
1339 }
1340
1341 oop java_lang_Class::module(oop java_class) {
1342 assert(_module_offset != 0, "must be set");
1343 return java_class->obj_field(_module_offset);
1344 }
1345
1346 void java_lang_Class::set_module(oop java_class, oop module) {
1347 assert(_module_offset != 0, "must be set");
1348 java_class->obj_field_put(_module_offset, module);
1349 }
1350
1351 oop java_lang_Class::name(Handle java_class, TRAPS) {
1352 assert(_name_offset != 0, "must be set");
1353 oop o = java_class->obj_field(_name_offset);
1354 if (o == NULL) {
1355 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD);
1356 java_class->obj_field_put(_name_offset, o);
1357 }
1358 return o;
1359 }
1360
1361 oop java_lang_Class::source_file(oop java_class) {
1362 assert(_source_file_offset != 0, "must be set");
1363 return java_class->obj_field(_source_file_offset);
1364 }
1365
1366 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1367 assert(_source_file_offset != 0, "must be set");
1368 java_class->obj_field_put(_source_file_offset, source_file);
1369 }
1370
1371 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1372 // This should be improved by adding a field at the Java level or by
1373 // introducing a new VM klass (see comment in ClassFileParser)
1374 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
1375 if (type != T_VOID) {
1376 Klass* aklass = Universe::typeArrayKlassObj(type);
1377 assert(aklass != NULL, "correct bootstrap");
1378 release_set_array_klass(java_class, aklass);
1379 }
1380 #ifdef ASSERT
1381 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
1382 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1383 #endif
1384 return java_class;
1385 }
1386
1387
1388 Klass* java_lang_Class::as_Klass(oop java_class) {
1389 //%note memory_2
1390 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1391 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1392 assert(k == NULL || k->is_klass(), "type check");
1393 return k;
1394 }
1395
1396 Klass* java_lang_Class::as_Klass_raw(oop java_class) {
1397 //%note memory_2
1398 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1399 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset));
1400 assert(k == NULL || k->is_klass(), "type check");
1401 return k;
1402 }
1403
1404
1405 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1406 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1407 java_class->metadata_field_put(_klass_offset, klass);
1408 }
1409
1410
1411 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1412 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1413 Symbol* name = NULL;
1414 bool is_instance = false;
1415 if (is_primitive(java_class)) {
1416 name = vmSymbols::type_signature(primitive_type(java_class));
1417 } else {
1418 Klass* k = as_Klass(java_class);
1419 is_instance = k->is_instance_klass();
1420 name = k->name();
1421 }
1422 if (name == NULL) {
1423 st->print("<null>");
1424 return;
1425 }
1426 if (is_instance) st->print("L");
1427 st->write((char*) name->base(), (int) name->utf8_length());
1428 if (is_instance) st->print(";");
1429 }
1430
1431 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
1432 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1433 Symbol* name;
1434 if (is_primitive(java_class)) {
1435 name = vmSymbols::type_signature(primitive_type(java_class));
1436 // Because this can create a new symbol, the caller has to decrement
1437 // the refcount, so make adjustment here and below for symbols returned
1438 // that are not created or incremented due to a successful lookup.
1439 name->increment_refcount();
1440 } else {
1441 Klass* k = as_Klass(java_class);
1442 if (!k->is_instance_klass()) {
1443 name = k->name();
1444 name->increment_refcount();
1445 } else {
1446 ResourceMark rm;
1447 const char* sigstr = k->signature_name();
1448 int siglen = (int) strlen(sigstr);
1449 if (!intern_if_not_found) {
1450 name = SymbolTable::probe(sigstr, siglen);
1451 } else {
1452 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
1453 }
1454 }
1455 }
1456 return name;
1457 }
1458
1459 // Returns the Java name for this Java mirror (Resource allocated)
1460 // See Klass::external_name().
1461 // For primitive type Java mirrors, its type name is returned.
1462 const char* java_lang_Class::as_external_name(oop java_class) {
1463 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1464 const char* name = NULL;
1465 if (is_primitive(java_class)) {
1466 name = type2name(primitive_type(java_class));
1467 } else {
1468 name = as_Klass(java_class)->external_name();
1469 }
1470 if (name == NULL) {
1471 name = "<null>";
1472 }
1473 return name;
1474 }
1475
1476 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1477 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1478 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1479 return k;
1480 }
1481
1482
1483 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1484 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1485 java_class->release_metadata_field_put(_array_klass_offset, klass);
1486 }
1487
1488
1489 BasicType java_lang_Class::primitive_type(oop java_class) {
1490 assert(java_lang_Class::is_primitive(java_class), "just checking");
1491 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1492 BasicType type = T_VOID;
1493 if (ak != NULL) {
1494 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1495 type = ArrayKlass::cast(ak)->element_type();
1496 } else {
1497 assert(oopDesc::equals(java_class, Universe::void_mirror()), "only valid non-array primitive");
1498 }
1499 assert(oopDesc::equals(Universe::java_mirror(type), java_class), "must be consistent");
1500 return type;
1501 }
1502
1503 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1504 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1505 if (is_primitive(java_class)) {
1506 if (reference_klass != NULL)
1507 (*reference_klass) = NULL;
1508 return primitive_type(java_class);
1509 } else {
1510 if (reference_klass != NULL)
1511 (*reference_klass) = as_Klass(java_class);
1512 return T_OBJECT;
1513 }
1514 }
1515
1516
1517 oop java_lang_Class::primitive_mirror(BasicType t) {
1518 oop mirror = Universe::java_mirror(t);
1519 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1520 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1521 return mirror;
1522 }
1523
1524 bool java_lang_Class::offsets_computed = false;
1525 int java_lang_Class::classRedefinedCount_offset = -1;
1526
1527 #define CLASS_FIELDS_DO(macro) \
1528 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \
1529 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1530 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1531 macro(_module_offset, k, "module", module_signature, false); \
1532 macro(_name_offset, k, "name", string_signature, false); \
1533
1534 void java_lang_Class::compute_offsets() {
1535 if (offsets_computed) {
1536 return;
1537 }
1538
1539 offsets_computed = true;
1540
1541 InstanceKlass* k = SystemDictionary::Class_klass();
1542 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1543
1544 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1545 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1546 // GC treats them the same.
1547 _init_lock_offset = _component_mirror_offset;
1548
1549 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1550 }
1551
1552 #if INCLUDE_CDS
1553 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1554 f->do_u4((u4*)&offsets_computed);
1555 f->do_u4((u4*)&_init_lock_offset);
1556
1557 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1558
1559 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1560 }
1561 #endif
1562
1563 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1564 if (classRedefinedCount_offset == -1) {
1565 // If we don't have an offset for it then just return -1 as a marker.
1566 return -1;
1567 }
1568
1569 return the_class_mirror->int_field(classRedefinedCount_offset);
1570 }
1571
1572 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1573 if (classRedefinedCount_offset == -1) {
1574 // If we don't have an offset for it then nothing to set.
1575 return;
1576 }
1577
1578 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1579 }
1580
1581
1582 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1583 // platform thread structure, and a eetop offset which was used for thread
1584 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1585 // merged, so in the HotSpot VM we just use the eetop field for the thread
1586 // instead of the privateInfo_offset.
1587 //
1588 // Note: The stackSize field is only present starting in 1.4.
1589
1590 int java_lang_Thread::_name_offset = 0;
1591 int java_lang_Thread::_group_offset = 0;
1592 int java_lang_Thread::_contextClassLoader_offset = 0;
1593 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1594 int java_lang_Thread::_priority_offset = 0;
1595 int java_lang_Thread::_eetop_offset = 0;
1596 int java_lang_Thread::_daemon_offset = 0;
1597 int java_lang_Thread::_stillborn_offset = 0;
1598 int java_lang_Thread::_stackSize_offset = 0;
1599 int java_lang_Thread::_tid_offset = 0;
1600 int java_lang_Thread::_thread_status_offset = 0;
1601 int java_lang_Thread::_park_blocker_offset = 0;
1602 int java_lang_Thread::_park_event_offset = 0 ;
1603
1604 #define THREAD_FIELDS_DO(macro) \
1605 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1606 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1607 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1608 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1609 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1610 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1611 macro(_eetop_offset, k, "eetop", long_signature, false); \
1612 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \
1613 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1614 macro(_tid_offset, k, "tid", long_signature, false); \
1615 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \
1616 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1617 macro(_park_event_offset, k, "nativeParkEventPointer", long_signature, false)
1618
1619 void java_lang_Thread::compute_offsets() {
1620 assert(_group_offset == 0, "offsets should be initialized only once");
1621
1622 InstanceKlass* k = SystemDictionary::Thread_klass();
1623 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1624 }
1625
1626 #if INCLUDE_CDS
1627 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1628 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1629 }
1630 #endif
1631
1632 JavaThread* java_lang_Thread::thread(oop java_thread) {
1633 return (JavaThread*)java_thread->address_field(_eetop_offset);
1634 }
1635
1636
1637 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1638 java_thread->address_field_put(_eetop_offset, (address)thread);
1639 }
1640
1641
1642 oop java_lang_Thread::name(oop java_thread) {
1643 return java_thread->obj_field(_name_offset);
1644 }
1645
1646
1647 void java_lang_Thread::set_name(oop java_thread, oop name) {
1648 java_thread->obj_field_put(_name_offset, name);
1649 }
1650
1651
1652 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1653 return (ThreadPriority)java_thread->int_field(_priority_offset);
1654 }
1655
1656
1657 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1658 java_thread->int_field_put(_priority_offset, priority);
1659 }
1660
1661
1662 oop java_lang_Thread::threadGroup(oop java_thread) {
1663 return java_thread->obj_field(_group_offset);
1664 }
1665
1666
1667 bool java_lang_Thread::is_stillborn(oop java_thread) {
1668 return java_thread->bool_field(_stillborn_offset) != 0;
1669 }
1670
1671
1672 // We never have reason to turn the stillborn bit off
1673 void java_lang_Thread::set_stillborn(oop java_thread) {
1674 java_thread->bool_field_put(_stillborn_offset, true);
1675 }
1676
1677
1678 bool java_lang_Thread::is_alive(oop java_thread) {
1679 JavaThread* thr = java_lang_Thread::thread(java_thread);
1680 return (thr != NULL);
1681 }
1682
1683
1684 bool java_lang_Thread::is_daemon(oop java_thread) {
1685 return java_thread->bool_field(_daemon_offset) != 0;
1686 }
1687
1688
1689 void java_lang_Thread::set_daemon(oop java_thread) {
1690 java_thread->bool_field_put(_daemon_offset, true);
1691 }
1692
1693 oop java_lang_Thread::context_class_loader(oop java_thread) {
1694 return java_thread->obj_field(_contextClassLoader_offset);
1695 }
1696
1697 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1698 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1699 }
1700
1701
1702 jlong java_lang_Thread::stackSize(oop java_thread) {
1703 if (_stackSize_offset > 0) {
1704 return java_thread->long_field(_stackSize_offset);
1705 } else {
1706 return 0;
1707 }
1708 }
1709
1710 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1711 void java_lang_Thread::set_thread_status(oop java_thread,
1712 java_lang_Thread::ThreadStatus status) {
1713 // The threadStatus is only present starting in 1.5
1714 if (_thread_status_offset > 0) {
1715 java_thread->int_field_put(_thread_status_offset, status);
1716 }
1717 }
1718
1719 // Read thread status value from threadStatus field in java.lang.Thread java class.
1720 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1721 // Make sure the caller is operating on behalf of the VM or is
1722 // running VM code (state == _thread_in_vm).
1723 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1724 JavaThread::current()->thread_state() == _thread_in_vm,
1725 "Java Thread is not running in vm");
1726 // The threadStatus is only present starting in 1.5
1727 if (_thread_status_offset > 0) {
1728 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1729 } else {
1730 // All we can easily figure out is if it is alive, but that is
1731 // enough info for a valid unknown status.
1732 // These aren't restricted to valid set ThreadStatus values, so
1733 // use JVMTI values and cast.
1734 JavaThread* thr = java_lang_Thread::thread(java_thread);
1735 if (thr == NULL) {
1736 // the thread hasn't run yet or is in the process of exiting
1737 return NEW;
1738 }
1739 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1740 }
1741 }
1742
1743
1744 jlong java_lang_Thread::thread_id(oop java_thread) {
1745 // The thread ID field is only present starting in 1.5
1746 if (_tid_offset > 0) {
1747 return java_thread->long_field(_tid_offset);
1748 } else {
1749 return 0;
1750 }
1751 }
1752
1753 oop java_lang_Thread::park_blocker(oop java_thread) {
1754 assert(JDK_Version::current().supports_thread_park_blocker() &&
1755 _park_blocker_offset != 0, "Must support parkBlocker field");
1756
1757 if (_park_blocker_offset > 0) {
1758 return java_thread->obj_field(_park_blocker_offset);
1759 }
1760
1761 return NULL;
1762 }
1763
1764 jlong java_lang_Thread::park_event(oop java_thread) {
1765 if (_park_event_offset > 0) {
1766 return java_thread->long_field(_park_event_offset);
1767 }
1768 return 0;
1769 }
1770
1771 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1772 if (_park_event_offset > 0) {
1773 java_thread->long_field_put(_park_event_offset, ptr);
1774 return true;
1775 }
1776 return false;
1777 }
1778
1779
1780 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1781 assert(_thread_status_offset != 0, "Must have thread status");
1782 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1783 switch (status) {
1784 case NEW : return "NEW";
1785 case RUNNABLE : return "RUNNABLE";
1786 case SLEEPING : return "TIMED_WAITING (sleeping)";
1787 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1788 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1789 case PARKED : return "WAITING (parking)";
1790 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1791 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1792 case TERMINATED : return "TERMINATED";
1793 default : return "UNKNOWN";
1794 };
1795 }
1796 int java_lang_ThreadGroup::_parent_offset = 0;
1797 int java_lang_ThreadGroup::_name_offset = 0;
1798 int java_lang_ThreadGroup::_threads_offset = 0;
1799 int java_lang_ThreadGroup::_groups_offset = 0;
1800 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1801 int java_lang_ThreadGroup::_destroyed_offset = 0;
1802 int java_lang_ThreadGroup::_daemon_offset = 0;
1803 int java_lang_ThreadGroup::_nthreads_offset = 0;
1804 int java_lang_ThreadGroup::_ngroups_offset = 0;
1805
1806 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1807 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1808 return java_thread_group->obj_field(_parent_offset);
1809 }
1810
1811 // ("name as oop" accessor is not necessary)
1812
1813 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1814 oop name = java_thread_group->obj_field(_name_offset);
1815 // ThreadGroup.name can be null
1816 if (name != NULL) {
1817 return java_lang_String::as_utf8_string(name);
1818 }
1819 return NULL;
1820 }
1821
1822 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1823 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1824 return java_thread_group->int_field(_nthreads_offset);
1825 }
1826
1827 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1828 oop threads = java_thread_group->obj_field(_threads_offset);
1829 assert(threads != NULL, "threadgroups should have threads");
1830 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1831 return objArrayOop(threads);
1832 }
1833
1834 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1835 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1836 return java_thread_group->int_field(_ngroups_offset);
1837 }
1838
1839 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1840 oop groups = java_thread_group->obj_field(_groups_offset);
1841 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1842 return objArrayOop(groups);
1843 }
1844
1845 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1846 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1847 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1848 }
1849
1850 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1851 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1852 return java_thread_group->bool_field(_destroyed_offset) != 0;
1853 }
1854
1855 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1856 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1857 return java_thread_group->bool_field(_daemon_offset) != 0;
1858 }
1859
1860 #define THREADGROUP_FIELDS_DO(macro) \
1861 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1862 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1863 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \
1864 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \
1865 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1866 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \
1867 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1868 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \
1869 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false)
1870
1871 void java_lang_ThreadGroup::compute_offsets() {
1872 assert(_parent_offset == 0, "offsets should be initialized only once");
1873
1874 InstanceKlass* k = SystemDictionary::ThreadGroup_klass();
1875 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1876 }
1877
1878 #if INCLUDE_CDS
1879 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1880 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1881 }
1882 #endif
1883
1884 #define THROWABLE_FIELDS_DO(macro) \
1885 macro(backtrace_offset, k, "backtrace", object_signature, false); \
1886 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \
1887 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
1888 macro(depth_offset, k, "depth", int_signature, false); \
1889 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
1890
1891 void java_lang_Throwable::compute_offsets() {
1892 InstanceKlass* k = SystemDictionary::Throwable_klass();
1893 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1894 }
1895
1896 #if INCLUDE_CDS
1897 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
1898 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1899 }
1900 #endif
1901
1902 oop java_lang_Throwable::unassigned_stacktrace() {
1903 InstanceKlass* ik = SystemDictionary::Throwable_klass();
1904 oop base = ik->static_field_base_raw();
1905 return base->obj_field(static_unassigned_stacktrace_offset);
1906 }
1907
1908 oop java_lang_Throwable::backtrace(oop throwable) {
1909 return throwable->obj_field_acquire(backtrace_offset);
1910 }
1911
1912
1913 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1914 throwable->release_obj_field_put(backtrace_offset, value);
1915 }
1916
1917 int java_lang_Throwable::depth(oop throwable) {
1918 return throwable->int_field(depth_offset);
1919 }
1920
1921 void java_lang_Throwable::set_depth(oop throwable, int value) {
1922 throwable->int_field_put(depth_offset, value);
1923 }
1924
1925 oop java_lang_Throwable::message(oop throwable) {
1926 return throwable->obj_field(detailMessage_offset);
1927 }
1928
1929
1930 // Return Symbol for detailed_message or NULL
1931 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1932 PRESERVE_EXCEPTION_MARK; // Keep original exception
1933 oop detailed_message = java_lang_Throwable::message(throwable);
1934 if (detailed_message != NULL) {
1935 return java_lang_String::as_symbol(detailed_message, THREAD);
1936 }
1937 return NULL;
1938 }
1939
1940 void java_lang_Throwable::set_message(oop throwable, oop value) {
1941 throwable->obj_field_put(detailMessage_offset, value);
1942 }
1943
1944
1945 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1946 throwable->obj_field_put(stackTrace_offset, st_element_array);
1947 }
1948
1949 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1950 set_stacktrace(throwable, NULL);
1951 }
1952
1953
1954 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1955 ResourceMark rm;
1956 Klass* k = throwable->klass();
1957 assert(k != NULL, "just checking");
1958 st->print("%s", k->external_name());
1959 oop msg = message(throwable);
1960 if (msg != NULL) {
1961 st->print(": %s", java_lang_String::as_utf8_string(msg));
1962 }
1963 }
1964
1965 // After this many redefines, the stack trace is unreliable.
1966 const int MAX_VERSION = USHRT_MAX;
1967
1968 static inline bool version_matches(Method* method, int version) {
1969 assert(version < MAX_VERSION, "version is too big");
1970 return method != NULL && (method->constants()->version() == version);
1971 }
1972
1973
1974 // This class provides a simple wrapper over the internal structure of
1975 // exception backtrace to insulate users of the backtrace from needing
1976 // to know what it looks like.
1977 class BacktraceBuilder: public StackObj {
1978 friend class BacktraceIterator;
1979 private:
1980 Handle _backtrace;
1981 objArrayOop _head;
1982 typeArrayOop _methods;
1983 typeArrayOop _bcis;
1984 objArrayOop _mirrors;
1985 typeArrayOop _names; // needed to insulate method name against redefinition
1986 int _index;
1987 NoSafepointVerifier _nsv;
1988
1989 enum {
1990 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1991 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1992 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1993 trace_names_offset = java_lang_Throwable::trace_names_offset,
1994 trace_next_offset = java_lang_Throwable::trace_next_offset,
1995 trace_size = java_lang_Throwable::trace_size,
1996 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1997 };
1998
1999 // get info out of chunks
2000 static typeArrayOop get_methods(objArrayHandle chunk) {
2001 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2002 assert(methods != NULL, "method array should be initialized in backtrace");
2003 return methods;
2004 }
2005 static typeArrayOop get_bcis(objArrayHandle chunk) {
2006 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2007 assert(bcis != NULL, "bci array should be initialized in backtrace");
2008 return bcis;
2009 }
2010 static objArrayOop get_mirrors(objArrayHandle chunk) {
2011 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2012 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
2013 return mirrors;
2014 }
2015 static typeArrayOop get_names(objArrayHandle chunk) {
2016 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2017 assert(names != NULL, "names array should be initialized in backtrace");
2018 return names;
2019 }
2020
2021 public:
2022
2023 // constructor for new backtrace
2024 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL) {
2025 expand(CHECK);
2026 _backtrace = Handle(THREAD, _head);
2027 _index = 0;
2028 }
2029
2030 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2031 _methods = get_methods(backtrace);
2032 _bcis = get_bcis(backtrace);
2033 _mirrors = get_mirrors(backtrace);
2034 _names = get_names(backtrace);
2035 assert(_methods->length() == _bcis->length() &&
2036 _methods->length() == _mirrors->length() &&
2037 _mirrors->length() == _names->length(),
2038 "method and source information arrays should match");
2039
2040 // head is the preallocated backtrace
2041 _head = backtrace();
2042 _backtrace = Handle(thread, _head);
2043 _index = 0;
2044 }
2045
2046 void expand(TRAPS) {
2047 objArrayHandle old_head(THREAD, _head);
2048 PauseNoSafepointVerifier pnsv(&_nsv);
2049
2050 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2051 objArrayHandle new_head(THREAD, head);
2052
2053 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2054 typeArrayHandle new_methods(THREAD, methods);
2055
2056 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2057 typeArrayHandle new_bcis(THREAD, bcis);
2058
2059 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2060 objArrayHandle new_mirrors(THREAD, mirrors);
2061
2062 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2063 typeArrayHandle new_names(THREAD, names);
2064
2065 if (!old_head.is_null()) {
2066 old_head->obj_at_put(trace_next_offset, new_head());
2067 }
2068 new_head->obj_at_put(trace_methods_offset, new_methods());
2069 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2070 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2071 new_head->obj_at_put(trace_names_offset, new_names());
2072
2073 _head = new_head();
2074 _methods = new_methods();
2075 _bcis = new_bcis();
2076 _mirrors = new_mirrors();
2077 _names = new_names();
2078 _index = 0;
2079 }
2080
2081 oop backtrace() {
2082 return _backtrace();
2083 }
2084
2085 inline void push(Method* method, int bci, TRAPS) {
2086 // Smear the -1 bci to 0 since the array only holds unsigned
2087 // shorts. The later line number lookup would just smear the -1
2088 // to a 0 even if it could be recorded.
2089 if (bci == SynchronizationEntryBCI) bci = 0;
2090
2091 if (_index >= trace_chunk_size) {
2092 methodHandle mhandle(THREAD, method);
2093 expand(CHECK);
2094 method = mhandle();
2095 }
2096
2097 _methods->ushort_at_put(_index, method->orig_method_idnum());
2098 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2099
2100 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2101 // klass owning the symbols alive so their refcounts aren't decremented.
2102 Symbol* name = method->name();
2103 _names->symbol_at_put(_index, name);
2104
2105 // We need to save the mirrors in the backtrace to keep the class
2106 // from being unloaded while we still have this stack trace.
2107 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
2108 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2109 _index++;
2110 }
2111
2112 };
2113
2114 struct BacktraceElement : public StackObj {
2115 int _method_id;
2116 int _bci;
2117 int _version;
2118 Symbol* _name;
2119 Handle _mirror;
2120 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2121 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2122 };
2123
2124 class BacktraceIterator : public StackObj {
2125 int _index;
2126 objArrayHandle _result;
2127 objArrayHandle _mirrors;
2128 typeArrayHandle _methods;
2129 typeArrayHandle _bcis;
2130 typeArrayHandle _names;
2131
2132 void init(objArrayHandle result, Thread* thread) {
2133 // Get method id, bci, version and mirror from chunk
2134 _result = result;
2135 if (_result.not_null()) {
2136 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2137 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2138 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2139 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2140 _index = 0;
2141 }
2142 }
2143 public:
2144 BacktraceIterator(objArrayHandle result, Thread* thread) {
2145 init(result, thread);
2146 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2147 }
2148
2149 BacktraceElement next(Thread* thread) {
2150 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2151 _methods->ushort_at(_index),
2152 Backtrace::version_at(_bcis->int_at(_index)),
2153 Backtrace::bci_at(_bcis->int_at(_index)),
2154 _names->symbol_at(_index));
2155 _index++;
2156
2157 if (_index >= java_lang_Throwable::trace_chunk_size) {
2158 int next_offset = java_lang_Throwable::trace_next_offset;
2159 // Get next chunk
2160 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2161 init(result, thread);
2162 }
2163 return e;
2164 }
2165
2166 bool repeat() {
2167 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
2168 }
2169 };
2170
2171
2172 // Print stack trace element to resource allocated buffer
2173 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2174 int version, int bci, Symbol* name) {
2175 ResourceMark rm;
2176
2177 // Get strings and string lengths
2178 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2179 const char* klass_name = holder->external_name();
2180 int buf_len = (int)strlen(klass_name);
2181
2182 char* method_name = name->as_C_string();
2183 buf_len += (int)strlen(method_name);
2184
2185 char* source_file_name = NULL;
2186 Symbol* source = Backtrace::get_source_file_name(holder, version);
2187 if (source != NULL) {
2188 source_file_name = source->as_C_string();
2189 buf_len += (int)strlen(source_file_name);
2190 }
2191
2192 char *module_name = NULL, *module_version = NULL;
2193 ModuleEntry* module = holder->module();
2194 if (module->is_named()) {
2195 module_name = module->name()->as_C_string();
2196 buf_len += (int)strlen(module_name);
2197 if (module->version() != NULL) {
2198 module_version = module->version()->as_C_string();
2199 buf_len += (int)strlen(module_version);
2200 }
2201 }
2202
2203 // Allocate temporary buffer with extra space for formatting and line number
2204 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
2205
2206 // Print stack trace line in buffer
2207 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
2208
2209 // Print module information
2210 if (module_name != NULL) {
2211 if (module_version != NULL) {
2212 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
2213 } else {
2214 sprintf(buf + (int)strlen(buf), "%s/", module_name);
2215 }
2216 }
2217
2218 // The method can be NULL if the requested class version is gone
2219 Method* method = holder->method_with_orig_idnum(method_id, version);
2220 if (!version_matches(method, version)) {
2221 strcat(buf, "Redefined)");
2222 } else {
2223 int line_number = Backtrace::get_line_number(method, bci);
2224 if (line_number == -2) {
2225 strcat(buf, "Native Method)");
2226 } else {
2227 if (source_file_name != NULL && (line_number != -1)) {
2228 // Sourcename and linenumber
2229 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
2230 } else if (source_file_name != NULL) {
2231 // Just sourcename
2232 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
2233 } else {
2234 // Neither sourcename nor linenumber
2235 sprintf(buf + (int)strlen(buf), "Unknown Source)");
2236 }
2237 CompiledMethod* nm = method->code();
2238 if (WizardMode && nm != NULL) {
2239 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2240 }
2241 }
2242 }
2243
2244 st->print_cr("%s", buf);
2245 }
2246
2247 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
2248 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2249 int method_id = method->orig_method_idnum();
2250 int version = method->constants()->version();
2251 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2252 }
2253
2254 /**
2255 * Print the throwable message and its stack trace plus all causes by walking the
2256 * cause chain. The output looks the same as of Throwable.printStackTrace().
2257 */
2258 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2259 // First, print the message.
2260 print(throwable(), st);
2261 st->cr();
2262
2263 // Now print the stack trace.
2264 Thread* THREAD = Thread::current();
2265 while (throwable.not_null()) {
2266 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2267 if (result.is_null()) {
2268 st->print_raw_cr("\t<<no stack trace available>>");
2269 return;
2270 }
2271 BacktraceIterator iter(result, THREAD);
2272
2273 while (iter.repeat()) {
2274 BacktraceElement bte = iter.next(THREAD);
2275 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2276 }
2277 {
2278 // Call getCause() which doesn't necessarily return the _cause field.
2279 EXCEPTION_MARK;
2280 JavaValue cause(T_OBJECT);
2281 JavaCalls::call_virtual(&cause,
2282 throwable,
2283 throwable->klass(),
2284 vmSymbols::getCause_name(),
2285 vmSymbols::void_throwable_signature(),
2286 THREAD);
2287 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2288 if (HAS_PENDING_EXCEPTION) {
2289 CLEAR_PENDING_EXCEPTION;
2290 throwable = Handle();
2291 } else {
2292 throwable = Handle(THREAD, (oop) cause.get_jobject());
2293 if (throwable.not_null()) {
2294 st->print("Caused by: ");
2295 print(throwable(), st);
2296 st->cr();
2297 }
2298 }
2299 }
2300 }
2301 }
2302
2303 /**
2304 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2305 */
2306 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2307 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
2308 JavaValue result(T_VOID);
2309 JavaCalls::call_virtual(&result,
2310 throwable,
2311 SystemDictionary::Throwable_klass(),
2312 vmSymbols::printStackTrace_name(),
2313 vmSymbols::void_method_signature(),
2314 THREAD);
2315 }
2316
2317 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2318 if (!StackTraceInThrowable) return;
2319 ResourceMark rm(THREAD);
2320
2321 // Start out by clearing the backtrace for this object, in case the VM
2322 // runs out of memory while allocating the stack trace
2323 set_backtrace(throwable(), NULL);
2324 // Clear lazily constructed Java level stacktrace if refilling occurs
2325 // This is unnecessary in 1.7+ but harmless
2326 clear_stacktrace(throwable());
2327
2328 int max_depth = MaxJavaStackTraceDepth;
2329 JavaThread* thread = (JavaThread*)THREAD;
2330
2331 BacktraceBuilder bt(CHECK);
2332
2333 // If there is no Java frame just return the method that was being called
2334 // with bci 0
2335 if (!thread->has_last_Java_frame()) {
2336 if (max_depth >= 1 && method() != NULL) {
2337 bt.push(method(), 0, CHECK);
2338 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2339 set_depth(throwable(), 1);
2340 set_backtrace(throwable(), bt.backtrace());
2341 }
2342 return;
2343 }
2344
2345 // Instead of using vframe directly, this version of fill_in_stack_trace
2346 // basically handles everything by hand. This significantly improved the
2347 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2348 // See bug 6333838 for more details.
2349 // The "ASSERT" here is to verify this method generates the exactly same stack
2350 // trace as utilizing vframe.
2351 #ifdef ASSERT
2352 vframeStream st(thread);
2353 methodHandle st_method(THREAD, st.method());
2354 #endif
2355 int total_count = 0;
2356 RegisterMap map(thread, false);
2357 int decode_offset = 0;
2358 CompiledMethod* nm = NULL;
2359 bool skip_fillInStackTrace_check = false;
2360 bool skip_throwableInit_check = false;
2361 bool skip_hidden = !ShowHiddenFrames;
2362
2363 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2364 Method* method = NULL;
2365 int bci = 0;
2366
2367 // Compiled java method case.
2368 if (decode_offset != 0) {
2369 DebugInfoReadStream stream(nm, decode_offset);
2370 decode_offset = stream.read_int();
2371 method = (Method*)nm->metadata_at(stream.read_int());
2372 bci = stream.read_bci();
2373 } else {
2374 if (fr.is_first_frame()) break;
2375 address pc = fr.pc();
2376 if (fr.is_interpreted_frame()) {
2377 address bcp = fr.interpreter_frame_bcp();
2378 method = fr.interpreter_frame_method();
2379 bci = method->bci_from(bcp);
2380 fr = fr.sender(&map);
2381 } else {
2382 CodeBlob* cb = fr.cb();
2383 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
2384 // but non nmethod
2385 fr = fr.sender(&map);
2386 if (cb == NULL || !cb->is_compiled()) {
2387 continue;
2388 }
2389 nm = cb->as_compiled_method();
2390 if (nm->method()->is_native()) {
2391 method = nm->method();
2392 bci = 0;
2393 } else {
2394 PcDesc* pd = nm->pc_desc_at(pc);
2395 decode_offset = pd->scope_decode_offset();
2396 // if decode_offset is not equal to 0, it will execute the
2397 // "compiled java method case" at the beginning of the loop.
2398 continue;
2399 }
2400 }
2401 }
2402 #ifdef ASSERT
2403 assert(st_method() == method && st.bci() == bci,
2404 "Wrong stack trace");
2405 st.next();
2406 // vframeStream::method isn't GC-safe so store off a copy
2407 // of the Method* in case we GC.
2408 if (!st.at_end()) {
2409 st_method = st.method();
2410 }
2411 #endif
2412
2413 // the format of the stacktrace will be:
2414 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2415 // - 0 or more <init> methods for the exception class (skipped)
2416 // - rest of the stack
2417
2418 if (!skip_fillInStackTrace_check) {
2419 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2420 throwable->is_a(method->method_holder())) {
2421 continue;
2422 }
2423 else {
2424 skip_fillInStackTrace_check = true; // gone past them all
2425 }
2426 }
2427 if (!skip_throwableInit_check) {
2428 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2429
2430 // skip <init> methods of the exception class and superclasses
2431 // This is simlar to classic VM.
2432 if (method->name() == vmSymbols::object_initializer_name() &&
2433 throwable->is_a(method->method_holder())) {
2434 continue;
2435 } else {
2436 // there are none or we've seen them all - either way stop checking
2437 skip_throwableInit_check = true;
2438 }
2439 }
2440 if (method->is_hidden()) {
2441 if (skip_hidden) continue;
2442 }
2443 bt.push(method, bci, CHECK);
2444 total_count++;
2445 }
2446
2447 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2448
2449 // Put completed stack trace into throwable object
2450 set_backtrace(throwable(), bt.backtrace());
2451 set_depth(throwable(), total_count);
2452 }
2453
2454 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2455 // No-op if stack trace is disabled
2456 if (!StackTraceInThrowable) {
2457 return;
2458 }
2459
2460 // Disable stack traces for some preallocated out of memory errors
2461 if (!Universe::should_fill_in_stack_trace(throwable)) {
2462 return;
2463 }
2464
2465 PRESERVE_EXCEPTION_MARK;
2466
2467 JavaThread* thread = JavaThread::active();
2468 fill_in_stack_trace(throwable, method, thread);
2469 // ignore exceptions thrown during stack trace filling
2470 CLEAR_PENDING_EXCEPTION;
2471 }
2472
2473 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2474 // Allocate stack trace - backtrace is created but not filled in
2475
2476 // No-op if stack trace is disabled
2477 if (!StackTraceInThrowable) return;
2478 BacktraceBuilder bt(CHECK); // creates a backtrace
2479 set_backtrace(throwable(), bt.backtrace());
2480 }
2481
2482
2483 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2484 // Fill in stack trace into preallocated backtrace (no GC)
2485
2486 // No-op if stack trace is disabled
2487 if (!StackTraceInThrowable) return;
2488
2489 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2490
2491 JavaThread* THREAD = JavaThread::current();
2492
2493 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2494 assert(backtrace.not_null(), "backtrace should have been preallocated");
2495
2496 ResourceMark rm(THREAD);
2497 vframeStream st(THREAD);
2498
2499 BacktraceBuilder bt(THREAD, backtrace);
2500
2501 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2502 // methods as preallocated errors aren't created by "java" code.
2503
2504 // fill in as much stack trace as possible
2505 int chunk_count = 0;
2506 for (;!st.at_end(); st.next()) {
2507 bt.push(st.method(), st.bci(), CHECK);
2508 chunk_count++;
2509
2510 // Bail-out for deep stacks
2511 if (chunk_count >= trace_chunk_size) break;
2512 }
2513 set_depth(throwable(), chunk_count);
2514 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2515
2516 // We support the Throwable immutability protocol defined for Java 7.
2517 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2518 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2519 }
2520
2521 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2522 objArrayHandle stack_trace_array_h, TRAPS) {
2523
2524 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2525 THROW(vmSymbols::java_lang_NullPointerException());
2526 }
2527
2528 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2529
2530 if (stack_trace_array_h->length() != depth(throwable())) {
2531 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2532 }
2533
2534 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2535 BacktraceIterator iter(result, THREAD);
2536
2537 int index = 0;
2538 while (iter.repeat()) {
2539 BacktraceElement bte = iter.next(THREAD);
2540
2541 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2542
2543 if (stack_trace_element.is_null()) {
2544 THROW(vmSymbols::java_lang_NullPointerException());
2545 }
2546
2547 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2548 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2549
2550 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2551 method,
2552 bte._version,
2553 bte._bci,
2554 bte._name, CHECK);
2555 }
2556 }
2557
2558 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2559 // Allocate java.lang.StackTraceElement instance
2560 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2561 assert(k != NULL, "must be loaded in 1.4+");
2562 if (k->should_be_initialized()) {
2563 k->initialize(CHECK_0);
2564 }
2565
2566 Handle element = k->allocate_instance_handle(CHECK_0);
2567
2568 int version = method->constants()->version();
2569 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2570 return element();
2571 }
2572
2573 void java_lang_StackTraceElement::fill_in(Handle element,
2574 InstanceKlass* holder, const methodHandle& method,
2575 int version, int bci, Symbol* name, TRAPS) {
2576 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2577
2578 ResourceMark rm(THREAD);
2579 HandleMark hm(THREAD);
2580
2581 // Fill in class name
2582 Handle java_class(THREAD, holder->java_mirror());
2583 oop classname = java_lang_Class::name(java_class, CHECK);
2584 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2585 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2586
2587 oop loader = holder->class_loader();
2588 if (loader != NULL) {
2589 oop loader_name = java_lang_ClassLoader::name(loader);
2590 if (loader_name != NULL)
2591 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2592 }
2593
2594 // Fill in method name
2595 oop methodname = StringTable::intern(name, CHECK);
2596 java_lang_StackTraceElement::set_methodName(element(), methodname);
2597
2598 // Fill in module name and version
2599 ModuleEntry* module = holder->module();
2600 if (module->is_named()) {
2601 oop module_name = StringTable::intern(module->name(), CHECK);
2602 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2603 oop module_version;
2604 if (module->version() != NULL) {
2605 module_version = StringTable::intern(module->version(), CHECK);
2606 } else {
2607 module_version = NULL;
2608 }
2609 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2610 }
2611
2612 if (method() == NULL || !version_matches(method(), version)) {
2613 // The method was redefined, accurate line number information isn't available
2614 java_lang_StackTraceElement::set_fileName(element(), NULL);
2615 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2616 } else {
2617 // Fill in source file name and line number.
2618 Symbol* source = Backtrace::get_source_file_name(holder, version);
2619 oop source_file = java_lang_Class::source_file(java_class());
2620 if (source != NULL) {
2621 // Class was not redefined. We can trust its cache if set,
2622 // else we have to initialize it.
2623 if (source_file == NULL) {
2624 source_file = StringTable::intern(source, CHECK);
2625 java_lang_Class::set_source_file(java_class(), source_file);
2626 }
2627 } else {
2628 // Class was redefined. Dump the cache if it was set.
2629 if (source_file != NULL) {
2630 source_file = NULL;
2631 java_lang_Class::set_source_file(java_class(), source_file);
2632 }
2633 if (ShowHiddenFrames) {
2634 source = vmSymbols::unknown_class_name();
2635 source_file = StringTable::intern(source, CHECK);
2636 }
2637 }
2638 java_lang_StackTraceElement::set_fileName(element(), source_file);
2639
2640 int line_number = Backtrace::get_line_number(method, bci);
2641 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2642 }
2643 }
2644
2645 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2646 HandleMark hm(THREAD);
2647 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2648 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2649 // we should expand MemberName::name when Throwable uses StackTrace
2650 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2651 return method;
2652 }
2653
2654 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2655 // set Method* or mid/cpref
2656 HandleMark hm(THREAD);
2657 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2658 InstanceKlass* ik = method->method_holder();
2659 CallInfo info(method(), ik, CHECK);
2660 MethodHandles::init_method_MemberName(mname, info);
2661 // set bci
2662 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2663 // method may be redefined; store the version
2664 int version = method->constants()->version();
2665 assert((jushort)version == version, "version should be short");
2666 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2667 }
2668
2669 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2670 ResourceMark rm(THREAD);
2671 HandleMark hm(THREAD);
2672 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2673 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2674 InstanceKlass* holder = InstanceKlass::cast(clazz);
2675 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2676
2677 short version = stackFrame->short_field(_version_offset);
2678 short bci = stackFrame->short_field(_bci_offset);
2679 Symbol* name = method->name();
2680 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK);
2681 }
2682
2683 #define STACKFRAMEINFO_FIELDS_DO(macro) \
2684 macro(_memberName_offset, k, "memberName", object_signature, false); \
2685 macro(_bci_offset, k, "bci", short_signature, false)
2686
2687 void java_lang_StackFrameInfo::compute_offsets() {
2688 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass();
2689 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2690 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2691 }
2692
2693 #if INCLUDE_CDS
2694 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
2695 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2696 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2697 }
2698 #endif
2699
2700 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
2701 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
2702 macro(_locals_offset, k, "locals", object_array_signature, false); \
2703 macro(_operands_offset, k, "operands", object_array_signature, false); \
2704 macro(_mode_offset, k, "mode", int_signature, false)
2705
2706 void java_lang_LiveStackFrameInfo::compute_offsets() {
2707 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass();
2708 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2709 }
2710
2711 #if INCLUDE_CDS
2712 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
2713 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2714 }
2715 #endif
2716
2717 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
2718 macro(override_offset, k, "override", bool_signature, false)
2719
2720 void java_lang_reflect_AccessibleObject::compute_offsets() {
2721 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass();
2722 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2723 }
2724
2725 #if INCLUDE_CDS
2726 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
2727 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2728 }
2729 #endif
2730
2731 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2732 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2733 return (jboolean) reflect->bool_field(override_offset);
2734 }
2735
2736 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2737 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2738 reflect->bool_field_put(override_offset, (int) value);
2739 }
2740
2741 #define METHOD_FIELDS_DO(macro) \
2742 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2743 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2744 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
2745 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2746 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2747 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2748 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2749 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2750 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2751 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
2752 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
2753
2754 void java_lang_reflect_Method::compute_offsets() {
2755 InstanceKlass* k = SystemDictionary::reflect_Method_klass();
2756 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2757 }
2758
2759 #if INCLUDE_CDS
2760 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
2761 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2762 }
2763 #endif
2764
2765 Handle java_lang_reflect_Method::create(TRAPS) {
2766 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2767 Klass* klass = SystemDictionary::reflect_Method_klass();
2768 // This class is eagerly initialized during VM initialization, since we keep a refence
2769 // to one of the methods
2770 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2771 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2772 }
2773
2774 oop java_lang_reflect_Method::clazz(oop reflect) {
2775 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2776 return reflect->obj_field(clazz_offset);
2777 }
2778
2779 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2780 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2781 reflect->obj_field_put(clazz_offset, value);
2782 }
2783
2784 int java_lang_reflect_Method::slot(oop reflect) {
2785 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2786 return reflect->int_field(slot_offset);
2787 }
2788
2789 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2790 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2791 reflect->int_field_put(slot_offset, value);
2792 }
2793
2794 void java_lang_reflect_Method::set_name(oop method, oop value) {
2795 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2796 method->obj_field_put(name_offset, value);
2797 }
2798
2799 oop java_lang_reflect_Method::return_type(oop method) {
2800 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2801 return method->obj_field(returnType_offset);
2802 }
2803
2804 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2805 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2806 method->obj_field_put(returnType_offset, value);
2807 }
2808
2809 oop java_lang_reflect_Method::parameter_types(oop method) {
2810 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2811 return method->obj_field(parameterTypes_offset);
2812 }
2813
2814 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2815 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2816 method->obj_field_put(parameterTypes_offset, value);
2817 }
2818
2819 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2820 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2821 method->obj_field_put(exceptionTypes_offset, value);
2822 }
2823
2824 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2825 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2826 method->int_field_put(modifiers_offset, value);
2827 }
2828
2829 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2830 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2831 method->obj_field_put(signature_offset, value);
2832 }
2833
2834 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2835 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2836 method->obj_field_put(annotations_offset, value);
2837 }
2838
2839 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2840 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2841 method->obj_field_put(parameter_annotations_offset, value);
2842 }
2843
2844 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2845 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2846 method->obj_field_put(annotation_default_offset, value);
2847 }
2848
2849 #define CONSTRUCTOR_FIELDS_DO(macro) \
2850 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2851 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2852 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2853 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2854 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2855 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2856 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2857 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
2858
2859 void java_lang_reflect_Constructor::compute_offsets() {
2860 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass();
2861 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2862 }
2863
2864 #if INCLUDE_CDS
2865 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
2866 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2867 }
2868 #endif
2869
2870 Handle java_lang_reflect_Constructor::create(TRAPS) {
2871 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2872 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2873 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2874 InstanceKlass* ik = InstanceKlass::cast(k);
2875 // Ensure it is initialized
2876 ik->initialize(CHECK_NH);
2877 return ik->allocate_instance_handle(THREAD);
2878 }
2879
2880 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2881 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2882 return reflect->obj_field(clazz_offset);
2883 }
2884
2885 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2886 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2887 reflect->obj_field_put(clazz_offset, value);
2888 }
2889
2890 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2891 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2892 return constructor->obj_field(parameterTypes_offset);
2893 }
2894
2895 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2896 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2897 constructor->obj_field_put(parameterTypes_offset, value);
2898 }
2899
2900 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2901 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2902 constructor->obj_field_put(exceptionTypes_offset, value);
2903 }
2904
2905 int java_lang_reflect_Constructor::slot(oop reflect) {
2906 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2907 return reflect->int_field(slot_offset);
2908 }
2909
2910 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2911 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2912 reflect->int_field_put(slot_offset, value);
2913 }
2914
2915 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2916 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2917 constructor->int_field_put(modifiers_offset, value);
2918 }
2919
2920 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2921 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2922 constructor->obj_field_put(signature_offset, value);
2923 }
2924
2925 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2926 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2927 constructor->obj_field_put(annotations_offset, value);
2928 }
2929
2930 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2931 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2932 method->obj_field_put(parameter_annotations_offset, value);
2933 }
2934
2935 #define FIELD_FIELDS_DO(macro) \
2936 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2937 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2938 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \
2939 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2940 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2941 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2942 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
2943
2944 void java_lang_reflect_Field::compute_offsets() {
2945 InstanceKlass* k = SystemDictionary::reflect_Field_klass();
2946 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2947 }
2948
2949 #if INCLUDE_CDS
2950 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
2951 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2952 }
2953 #endif
2954
2955 Handle java_lang_reflect_Field::create(TRAPS) {
2956 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2957 Symbol* name = vmSymbols::java_lang_reflect_Field();
2958 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2959 InstanceKlass* ik = InstanceKlass::cast(k);
2960 // Ensure it is initialized
2961 ik->initialize(CHECK_NH);
2962 return ik->allocate_instance_handle(THREAD);
2963 }
2964
2965 oop java_lang_reflect_Field::clazz(oop reflect) {
2966 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2967 return reflect->obj_field(clazz_offset);
2968 }
2969
2970 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2971 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2972 reflect->obj_field_put(clazz_offset, value);
2973 }
2974
2975 oop java_lang_reflect_Field::name(oop field) {
2976 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2977 return field->obj_field(name_offset);
2978 }
2979
2980 void java_lang_reflect_Field::set_name(oop field, oop value) {
2981 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2982 field->obj_field_put(name_offset, value);
2983 }
2984
2985 oop java_lang_reflect_Field::type(oop field) {
2986 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2987 return field->obj_field(type_offset);
2988 }
2989
2990 void java_lang_reflect_Field::set_type(oop field, oop value) {
2991 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2992 field->obj_field_put(type_offset, value);
2993 }
2994
2995 int java_lang_reflect_Field::slot(oop reflect) {
2996 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2997 return reflect->int_field(slot_offset);
2998 }
2999
3000 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3001 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3002 reflect->int_field_put(slot_offset, value);
3003 }
3004
3005 int java_lang_reflect_Field::modifiers(oop field) {
3006 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3007 return field->int_field(modifiers_offset);
3008 }
3009
3010 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3011 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3012 field->int_field_put(modifiers_offset, value);
3013 }
3014
3015 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3016 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3017 field->obj_field_put(signature_offset, value);
3018 }
3019
3020 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3021 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3022 field->obj_field_put(annotations_offset, value);
3023 }
3024
3025 #define CONSTANTPOOL_FIELDS_DO(macro) \
3026 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3027
3028 void reflect_ConstantPool::compute_offsets() {
3029 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3030 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3031 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3032 }
3033
3034 #if INCLUDE_CDS
3035 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3036 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3037 }
3038 #endif
3039
3040 #define PARAMETER_FIELDS_DO(macro) \
3041 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3042 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3043 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \
3044 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3045
3046 void java_lang_reflect_Parameter::compute_offsets() {
3047 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass();
3048 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3049 }
3050
3051 #if INCLUDE_CDS
3052 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3053 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3054 }
3055 #endif
3056
3057 Handle java_lang_reflect_Parameter::create(TRAPS) {
3058 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3059 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3060 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3061 InstanceKlass* ik = InstanceKlass::cast(k);
3062 // Ensure it is initialized
3063 ik->initialize(CHECK_NH);
3064 return ik->allocate_instance_handle(THREAD);
3065 }
3066
3067 oop java_lang_reflect_Parameter::name(oop param) {
3068 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3069 return param->obj_field(name_offset);
3070 }
3071
3072 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3073 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3074 param->obj_field_put(name_offset, value);
3075 }
3076
3077 int java_lang_reflect_Parameter::modifiers(oop param) {
3078 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3079 return param->int_field(modifiers_offset);
3080 }
3081
3082 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3083 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3084 param->int_field_put(modifiers_offset, value);
3085 }
3086
3087 int java_lang_reflect_Parameter::index(oop param) {
3088 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3089 return param->int_field(index_offset);
3090 }
3091
3092 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3093 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3094 param->int_field_put(index_offset, value);
3095 }
3096
3097 oop java_lang_reflect_Parameter::executable(oop param) {
3098 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3099 return param->obj_field(executable_offset);
3100 }
3101
3102 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3103 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3104 param->obj_field_put(executable_offset, value);
3105 }
3106
3107
3108 int java_lang_Module::loader_offset;
3109 int java_lang_Module::name_offset;
3110 int java_lang_Module::_module_entry_offset = -1;
3111
3112 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3113 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3114 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(),
3115 vmSymbols::java_lang_module_init_signature(),
3116 loader, module_name, CHECK_NH);
3117 }
3118
3119 #define MODULE_FIELDS_DO(macro) \
3120 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3121 macro(name_offset, k, vmSymbols::name_name(), string_signature, false)
3122
3123 void java_lang_Module::compute_offsets() {
3124 InstanceKlass* k = SystemDictionary::Module_klass();
3125 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3126 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3127 }
3128
3129 #if INCLUDE_CDS
3130 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3131 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3132 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3133 }
3134 #endif
3135
3136 oop java_lang_Module::loader(oop module) {
3137 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3138 return module->obj_field(loader_offset);
3139 }
3140
3141 void java_lang_Module::set_loader(oop module, oop value) {
3142 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3143 module->obj_field_put(loader_offset, value);
3144 }
3145
3146 oop java_lang_Module::name(oop module) {
3147 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3148 return module->obj_field(name_offset);
3149 }
3150
3151 void java_lang_Module::set_name(oop module, oop value) {
3152 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3153 module->obj_field_put(name_offset, value);
3154 }
3155
3156 ModuleEntry* java_lang_Module::module_entry(oop module) {
3157 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3158 assert(module != NULL, "module can't be null");
3159 assert(oopDesc::is_oop(module), "module must be oop");
3160
3161 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3162 if (module_entry == NULL) {
3163 // If the inject field containing the ModuleEntry* is null then return the
3164 // class loader's unnamed module.
3165 oop loader = java_lang_Module::loader(module);
3166 Handle h_loader = Handle(Thread::current(), loader);
3167 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3168 return loader_cld->unnamed_module();
3169 }
3170 return module_entry;
3171 }
3172
3173 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3174 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3175 assert(module != NULL, "module can't be null");
3176 assert(oopDesc::is_oop(module), "module must be oop");
3177 module->address_field_put(_module_entry_offset, (address)module_entry);
3178 }
3179
3180 Handle reflect_ConstantPool::create(TRAPS) {
3181 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3182 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3183 // Ensure it is initialized
3184 k->initialize(CHECK_NH);
3185 return k->allocate_instance_handle(THREAD);
3186 }
3187
3188
3189 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3190 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3191 oop mirror = value->pool_holder()->java_mirror();
3192 // Save the mirror to get back the constant pool.
3193 reflect->obj_field_put(_oop_offset, mirror);
3194 }
3195
3196 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3197 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3198
3199 oop mirror = reflect->obj_field(_oop_offset);
3200 Klass* k = java_lang_Class::as_Klass(mirror);
3201 assert(k->is_instance_klass(), "Must be");
3202
3203 // Get the constant pool back from the klass. Since class redefinition
3204 // merges the new constant pool into the old, this is essentially the
3205 // same constant pool as the original. If constant pool merging is
3206 // no longer done in the future, this will have to change to save
3207 // the original.
3208 return InstanceKlass::cast(k)->constants();
3209 }
3210
3211 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3212 macro(_base_offset, k, "base", object_signature, false)
3213
3214 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3215 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
3216 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3217 }
3218
3219 #if INCLUDE_CDS
3220 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) {
3221 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3222 }
3223 #endif
3224
3225 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3226 Klass* k = SystemDictionary::box_klass(type);
3227 if (k == NULL) return NULL;
3228 InstanceKlass* ik = InstanceKlass::cast(k);
3229 if (!ik->is_initialized()) ik->initialize(CHECK_0);
3230 return ik->allocate_instance(THREAD);
3231 }
3232
3233
3234 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3235 oop box = initialize_and_allocate(type, CHECK_0);
3236 if (box == NULL) return NULL;
3237 switch (type) {
3238 case T_BOOLEAN:
3239 box->bool_field_put(value_offset, value->z);
3240 break;
3241 case T_CHAR:
3242 box->char_field_put(value_offset, value->c);
3243 break;
3244 case T_FLOAT:
3245 box->float_field_put(value_offset, value->f);
3246 break;
3247 case T_DOUBLE:
3248 box->double_field_put(long_value_offset, value->d);
3249 break;
3250 case T_BYTE:
3251 box->byte_field_put(value_offset, value->b);
3252 break;
3253 case T_SHORT:
3254 box->short_field_put(value_offset, value->s);
3255 break;
3256 case T_INT:
3257 box->int_field_put(value_offset, value->i);
3258 break;
3259 case T_LONG:
3260 box->long_field_put(long_value_offset, value->j);
3261 break;
3262 default:
3263 return NULL;
3264 }
3265 return box;
3266 }
3267
3268
3269 BasicType java_lang_boxing_object::basic_type(oop box) {
3270 if (box == NULL) return T_ILLEGAL;
3271 BasicType type = SystemDictionary::box_klass_type(box->klass());
3272 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3273 return T_ILLEGAL;
3274 return type;
3275 }
3276
3277
3278 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3279 BasicType type = SystemDictionary::box_klass_type(box->klass());
3280 switch (type) {
3281 case T_BOOLEAN:
3282 value->z = box->bool_field(value_offset);
3283 break;
3284 case T_CHAR:
3285 value->c = box->char_field(value_offset);
3286 break;
3287 case T_FLOAT:
3288 value->f = box->float_field(value_offset);
3289 break;
3290 case T_DOUBLE:
3291 value->d = box->double_field(long_value_offset);
3292 break;
3293 case T_BYTE:
3294 value->b = box->byte_field(value_offset);
3295 break;
3296 case T_SHORT:
3297 value->s = box->short_field(value_offset);
3298 break;
3299 case T_INT:
3300 value->i = box->int_field(value_offset);
3301 break;
3302 case T_LONG:
3303 value->j = box->long_field(long_value_offset);
3304 break;
3305 default:
3306 return T_ILLEGAL;
3307 } // end switch
3308 return type;
3309 }
3310
3311
3312 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3313 BasicType type = SystemDictionary::box_klass_type(box->klass());
3314 switch (type) {
3315 case T_BOOLEAN:
3316 box->bool_field_put(value_offset, value->z);
3317 break;
3318 case T_CHAR:
3319 box->char_field_put(value_offset, value->c);
3320 break;
3321 case T_FLOAT:
3322 box->float_field_put(value_offset, value->f);
3323 break;
3324 case T_DOUBLE:
3325 box->double_field_put(long_value_offset, value->d);
3326 break;
3327 case T_BYTE:
3328 box->byte_field_put(value_offset, value->b);
3329 break;
3330 case T_SHORT:
3331 box->short_field_put(value_offset, value->s);
3332 break;
3333 case T_INT:
3334 box->int_field_put(value_offset, value->i);
3335 break;
3336 case T_LONG:
3337 box->long_field_put(long_value_offset, value->j);
3338 break;
3339 default:
3340 return T_ILLEGAL;
3341 } // end switch
3342 return type;
3343 }
3344
3345
3346 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3347 switch (type) {
3348 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3349 case T_CHAR: st->print("%d", value->c); break;
3350 case T_BYTE: st->print("%d", value->b); break;
3351 case T_SHORT: st->print("%d", value->s); break;
3352 case T_INT: st->print("%d", value->i); break;
3353 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3354 case T_FLOAT: st->print("%f", value->f); break;
3355 case T_DOUBLE: st->print("%lf", value->d); break;
3356 default: st->print("type %d?", type); break;
3357 }
3358 }
3359
3360 // Support for java_lang_ref_Reference
3361
3362 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3363 assert(obj != NULL, "sanity");
3364 if (offset != java_lang_ref_Reference::referent_offset) {
3365 return false;
3366 }
3367
3368 Klass* k = obj->klass();
3369 if (!k->is_instance_klass()) {
3370 return false;
3371 }
3372
3373 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3374 bool is_reference = ik->reference_type() != REF_NONE;
3375 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
3376 return is_reference;
3377 }
3378
3379 // Support for java_lang_ref_SoftReference
3380 //
3381
3382 #define SOFTREFERENCE_FIELDS_DO(macro) \
3383 macro(timestamp_offset, k, "timestamp", long_signature, false); \
3384 macro(static_clock_offset, k, "clock", long_signature, true)
3385
3386 void java_lang_ref_SoftReference::compute_offsets() {
3387 InstanceKlass* k = SystemDictionary::SoftReference_klass();
3388 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3389 }
3390
3391 #if INCLUDE_CDS
3392 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3393 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3394 }
3395 #endif
3396
3397 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3398 return ref->long_field(timestamp_offset);
3399 }
3400
3401 jlong java_lang_ref_SoftReference::clock() {
3402 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3403 oop base = ik->static_field_base_raw();
3404 return base->long_field(static_clock_offset);
3405 }
3406
3407 void java_lang_ref_SoftReference::set_clock(jlong value) {
3408 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3409 oop base = ik->static_field_base_raw();
3410 base->long_field_put(static_clock_offset, value);
3411 }
3412
3413 // Support for java_lang_invoke_DirectMethodHandle
3414
3415 int java_lang_invoke_DirectMethodHandle::_member_offset;
3416
3417 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3418 oop member_name = NULL;
3419 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3420 "a DirectMethodHandle oop is expected");
3421 return dmh->obj_field(member_offset_in_bytes());
3422 }
3423
3424 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3425 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3426
3427 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3428 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass();
3429 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3430 }
3431
3432 #if INCLUDE_CDS
3433 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3434 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3435 }
3436 #endif
3437
3438 // Support for java_lang_invoke_MethodHandle
3439
3440 int java_lang_invoke_MethodHandle::_type_offset;
3441 int java_lang_invoke_MethodHandle::_form_offset;
3442
3443 int java_lang_invoke_MemberName::_clazz_offset;
3444 int java_lang_invoke_MemberName::_name_offset;
3445 int java_lang_invoke_MemberName::_type_offset;
3446 int java_lang_invoke_MemberName::_flags_offset;
3447 int java_lang_invoke_MemberName::_method_offset;
3448 int java_lang_invoke_MemberName::_vmindex_offset;
3449
3450 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3451 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3452
3453 int java_lang_invoke_LambdaForm::_vmentry_offset;
3454
3455 #define METHODHANDLE_FIELDS_DO(macro) \
3456 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3457 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
3458
3459 void java_lang_invoke_MethodHandle::compute_offsets() {
3460 InstanceKlass* k = SystemDictionary::MethodHandle_klass();
3461 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3462 }
3463
3464 #if INCLUDE_CDS
3465 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
3466 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3467 }
3468 #endif
3469
3470 #define MEMBERNAME_FIELDS_DO(macro) \
3471 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3472 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3473 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
3474 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3475 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
3476
3477 void java_lang_invoke_MemberName::compute_offsets() {
3478 InstanceKlass* k = SystemDictionary::MemberName_klass();
3479 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3480 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3481 }
3482
3483 #if INCLUDE_CDS
3484 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
3485 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3486 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3487 }
3488 #endif
3489
3490 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3491 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3492 assert(k != NULL, "jdk mismatch");
3493 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3494 }
3495
3496 #if INCLUDE_CDS
3497 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
3498 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3499 }
3500 #endif
3501
3502 #define LAMBDAFORM_FIELDS_DO(macro) \
3503 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
3504
3505 void java_lang_invoke_LambdaForm::compute_offsets() {
3506 InstanceKlass* k = SystemDictionary::LambdaForm_klass();
3507 assert (k != NULL, "jdk mismatch");
3508 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3509 }
3510
3511 #if INCLUDE_CDS
3512 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
3513 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3514 }
3515 #endif
3516
3517 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3518 return obj != NULL && is_subclass(obj->klass());
3519 }
3520
3521
3522 oop java_lang_invoke_MethodHandle::type(oop mh) {
3523 return mh->obj_field(_type_offset);
3524 }
3525
3526 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3527 mh->obj_field_put(_type_offset, mtype);
3528 }
3529
3530 oop java_lang_invoke_MethodHandle::form(oop mh) {
3531 assert(_form_offset != 0, "");
3532 return mh->obj_field(_form_offset);
3533 }
3534
3535 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3536 assert(_form_offset != 0, "");
3537 mh->obj_field_put(_form_offset, lform);
3538 }
3539
3540 /// MemberName accessors
3541
3542 oop java_lang_invoke_MemberName::clazz(oop mname) {
3543 assert(is_instance(mname), "wrong type");
3544 return mname->obj_field(_clazz_offset);
3545 }
3546
3547 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3548 assert(is_instance(mname), "wrong type");
3549 mname->obj_field_put(_clazz_offset, clazz);
3550 }
3551
3552 oop java_lang_invoke_MemberName::name(oop mname) {
3553 assert(is_instance(mname), "wrong type");
3554 return mname->obj_field(_name_offset);
3555 }
3556
3557 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3558 assert(is_instance(mname), "wrong type");
3559 mname->obj_field_put(_name_offset, name);
3560 }
3561
3562 oop java_lang_invoke_MemberName::type(oop mname) {
3563 assert(is_instance(mname), "wrong type");
3564 return mname->obj_field(_type_offset);
3565 }
3566
3567 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3568 assert(is_instance(mname), "wrong type");
3569 mname->obj_field_put(_type_offset, type);
3570 }
3571
3572 int java_lang_invoke_MemberName::flags(oop mname) {
3573 assert(is_instance(mname), "wrong type");
3574 return mname->int_field(_flags_offset);
3575 }
3576
3577 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3578 assert(is_instance(mname), "wrong type");
3579 mname->int_field_put(_flags_offset, flags);
3580 }
3581
3582
3583 // Return vmtarget from ResolvedMethodName method field through indirection
3584 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
3585 assert(is_instance(mname), "wrong type");
3586 oop method = mname->obj_field(_method_offset);
3587 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method);
3588 }
3589
3590 bool java_lang_invoke_MemberName::is_method(oop mname) {
3591 assert(is_instance(mname), "must be MemberName");
3592 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3593 }
3594
3595 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
3596 assert(is_instance(mname), "wrong type");
3597 mname->obj_field_put(_method_offset, resolved_method);
3598 }
3599
3600 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3601 assert(is_instance(mname), "wrong type");
3602 return (intptr_t) mname->address_field(_vmindex_offset);
3603 }
3604
3605 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3606 assert(is_instance(mname), "wrong type");
3607 mname->address_field_put(_vmindex_offset, (address) index);
3608 }
3609
3610
3611 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
3612 assert(is_instance(resolved_method), "wrong type");
3613 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
3614 assert(m->is_method(), "must be");
3615 return m;
3616 }
3617
3618 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
3619 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
3620 assert(is_instance(resolved_method), "wrong type");
3621 resolved_method->address_field_put(_vmtarget_offset, (address)m);
3622 }
3623
3624 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
3625 // lookup ResolvedMethod oop in the table, or create a new one and intern it
3626 oop resolved_method = ResolvedMethodTable::find_method(m());
3627 if (resolved_method == NULL) {
3628 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3629 if (!k->is_initialized()) {
3630 k->initialize(CHECK_NULL);
3631 }
3632 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
3633 new_resolved_method->address_field_put(_vmtarget_offset, (address)m());
3634 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have
3635 // distinct loaders) to ensure the metadata is kept alive.
3636 // This mirror may be different than the one in clazz field.
3637 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror());
3638 resolved_method = ResolvedMethodTable::add_method(Handle(THREAD, new_resolved_method));
3639 }
3640 return resolved_method;
3641 }
3642
3643 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3644 assert(is_instance(lform), "wrong type");
3645 return lform->obj_field(_vmentry_offset);
3646 }
3647
3648
3649 // Support for java_lang_invoke_MethodType
3650
3651 int java_lang_invoke_MethodType::_rtype_offset;
3652 int java_lang_invoke_MethodType::_ptypes_offset;
3653
3654 #define METHODTYPE_FIELDS_DO(macro) \
3655 macro(_rtype_offset, k, "rtype", class_signature, false); \
3656 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
3657
3658 void java_lang_invoke_MethodType::compute_offsets() {
3659 InstanceKlass* k = SystemDictionary::MethodType_klass();
3660 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3661 }
3662
3663 #if INCLUDE_CDS
3664 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
3665 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3666 }
3667 #endif
3668
3669 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3670 st->print("(");
3671 objArrayOop pts = ptypes(mt);
3672 for (int i = 0, limit = pts->length(); i < limit; i++) {
3673 java_lang_Class::print_signature(pts->obj_at(i), st);
3674 }
3675 st->print(")");
3676 java_lang_Class::print_signature(rtype(mt), st);
3677 }
3678
3679 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
3680 ResourceMark rm;
3681 stringStream buffer(128);
3682 print_signature(mt, &buffer);
3683 const char* sigstr = buffer.base();
3684 int siglen = (int) buffer.size();
3685 Symbol *name;
3686 if (!intern_if_not_found) {
3687 name = SymbolTable::probe(sigstr, siglen);
3688 } else {
3689 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
3690 }
3691 return name;
3692 }
3693
3694 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3695 if (oopDesc::equals(mt1, mt2))
3696 return true;
3697 if (!oopDesc::equals(rtype(mt1), rtype(mt2)))
3698 return false;
3699 if (ptype_count(mt1) != ptype_count(mt2))
3700 return false;
3701 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3702 if (!oopDesc::equals(ptype(mt1, i), ptype(mt2, i)))
3703 return false;
3704 }
3705 return true;
3706 }
3707
3708 oop java_lang_invoke_MethodType::rtype(oop mt) {
3709 assert(is_instance(mt), "must be a MethodType");
3710 return mt->obj_field(_rtype_offset);
3711 }
3712
3713 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3714 assert(is_instance(mt), "must be a MethodType");
3715 return (objArrayOop) mt->obj_field(_ptypes_offset);
3716 }
3717
3718 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3719 return ptypes(mt)->obj_at(idx);
3720 }
3721
3722 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3723 return ptypes(mt)->length();
3724 }
3725
3726 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3727 objArrayOop pts = ptypes(mt);
3728 int count = pts->length();
3729 int slots = 0;
3730 for (int i = 0; i < count; i++) {
3731 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3732 slots += type2size[bt];
3733 }
3734 return slots;
3735 }
3736
3737 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3738 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3739 return type2size[bt];
3740 }
3741
3742
3743 // Support for java_lang_invoke_CallSite
3744
3745 int java_lang_invoke_CallSite::_target_offset;
3746 int java_lang_invoke_CallSite::_context_offset;
3747
3748 #define CALLSITE_FIELDS_DO(macro) \
3749 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
3750 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
3751
3752 void java_lang_invoke_CallSite::compute_offsets() {
3753 InstanceKlass* k = SystemDictionary::CallSite_klass();
3754 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3755 }
3756
3757 #if INCLUDE_CDS
3758 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
3759 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3760 }
3761 #endif
3762
3763 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
3764 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3765
3766 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
3767 return dep_oop;
3768 }
3769
3770 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3771
3772 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3773 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
3774
3775 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3776 InstanceKlass* k = SystemDictionary::Context_klass();
3777 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3778 }
3779
3780 #if INCLUDE_CDS
3781 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
3782 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3783 }
3784 #endif
3785
3786 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3787 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3788 nmethodBucket* volatile* vmdeps_addr = (nmethodBucket* volatile*)call_site->field_addr(_vmdependencies_offset);
3789 volatile uint64_t* last_cleanup_addr = (volatile uint64_t*)call_site->field_addr(_last_cleanup_offset);
3790 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
3791 return dep_ctx;
3792 }
3793
3794 // Support for java_security_AccessControlContext
3795
3796 int java_security_AccessControlContext::_context_offset = 0;
3797 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3798 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3799 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3800
3801 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
3802 macro(_context_offset, k, "context", protectiondomain_signature, false); \
3803 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
3804 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
3805 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
3806
3807 void java_security_AccessControlContext::compute_offsets() {
3808 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3809 InstanceKlass* k = SystemDictionary::AccessControlContext_klass();
3810 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3811 }
3812
3813 #if INCLUDE_CDS
3814 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
3815 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3816 }
3817 #endif
3818
3819 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3820 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3821 // Ensure klass is initialized
3822 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3823 // Allocate result
3824 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3825 // Fill in values
3826 result->obj_field_put(_context_offset, context());
3827 result->obj_field_put(_privilegedContext_offset, privileged_context());
3828 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3829 // whitelist AccessControlContexts created by the JVM if present
3830 if (_isAuthorized_offset != -1) {
3831 result->bool_field_put(_isAuthorized_offset, true);
3832 }
3833 return result;
3834 }
3835
3836
3837 // Support for java_lang_ClassLoader
3838
3839 bool java_lang_ClassLoader::offsets_computed = false;
3840 int java_lang_ClassLoader::_loader_data_offset = -1;
3841 int java_lang_ClassLoader::parallelCapable_offset = -1;
3842 int java_lang_ClassLoader::name_offset = -1;
3843 int java_lang_ClassLoader::nameAndId_offset = -1;
3844 int java_lang_ClassLoader::unnamedModule_offset = -1;
3845
3846 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
3847 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3848 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset);
3849 }
3850
3851 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) {
3852 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3853 return RawAccess<>::load_at(loader, _loader_data_offset);
3854 }
3855
3856 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
3857 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3858 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data);
3859 }
3860
3861 #define CLASSLOADER_FIELDS_DO(macro) \
3862 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
3863 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \
3864 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \
3865 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
3866 macro(parent_offset, k1, "parent", classloader_signature, false)
3867
3868 void java_lang_ClassLoader::compute_offsets() {
3869 assert(!offsets_computed, "offsets should be initialized only once");
3870 offsets_computed = true;
3871
3872 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass();
3873 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3874
3875 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3876 }
3877
3878 #if INCLUDE_CDS
3879 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
3880 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3881 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3882 }
3883 #endif
3884
3885 oop java_lang_ClassLoader::parent(oop loader) {
3886 assert(is_instance(loader), "loader must be oop");
3887 return loader->obj_field(parent_offset);
3888 }
3889
3890 // Returns the name field of this class loader. If the name field has not
3891 // been set, null will be returned.
3892 oop java_lang_ClassLoader::name(oop loader) {
3893 assert(is_instance(loader), "loader must be oop");
3894 return loader->obj_field(name_offset);
3895 }
3896
3897 // Returns the nameAndId field of this class loader. The format is
3898 // as follows:
3899 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
3900 // If the defining loader has no name then <qualified-class-name> @<id>
3901 // If built-in loader, then omit '@<id>' as there is only one instance.
3902 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
3903 oop java_lang_ClassLoader::nameAndId(oop loader) {
3904 assert(is_instance(loader), "loader must be oop");
3905 return loader->obj_field(nameAndId_offset);
3906 }
3907
3908 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3909 assert(is_instance(loader), "loader must be oop");
3910 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3911 oop acl = loader;
3912 debug_only(jint loop_count = 0);
3913 // This loop taken verbatim from ClassLoader.java:
3914 do {
3915 acl = parent(acl);
3916 if (oopDesc::equals(cl, acl)) {
3917 return true;
3918 }
3919 assert(++loop_count > 0, "loop_count overflow");
3920 } while (acl != NULL);
3921 return false;
3922 }
3923
3924 bool java_lang_ClassLoader::is_instance(oop obj) {
3925 return obj != NULL && is_subclass(obj->klass());
3926 }
3927
3928
3929 // For class loader classes, parallelCapable defined
3930 // based on non-null field
3931 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3932 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3933 if (parallelCapable_offset == -1) {
3934 // Default for backward compatibility is false
3935 return false;
3936 }
3937 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3938 }
3939
3940 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3941 // Fix for 4474172; see evaluation for more details
3942 loader = non_reflection_class_loader(loader);
3943
3944 oop cl = SystemDictionary::java_system_loader();
3945 while(cl != NULL) {
3946 if (oopDesc::equals(cl, loader)) return true;
3947 cl = parent(cl);
3948 }
3949 return false;
3950 }
3951
3952 // Return true if this is one of the class loaders associated with
3953 // the generated bytecodes for reflection.
3954 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
3955 if (loader != NULL) {
3956 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3957 // This might be null in non-1.4 JDKs
3958 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
3959 }
3960 return false;
3961 }
3962
3963 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3964 // See whether this is one of the class loaders associated with
3965 // the generated bytecodes for reflection, and if so, "magically"
3966 // delegate to its parent to prevent class loading from occurring
3967 // in places where applications using reflection didn't expect it.
3968 if (is_reflection_class_loader(loader)) {
3969 return parent(loader);
3970 }
3971 return loader;
3972 }
3973
3974 oop java_lang_ClassLoader::unnamedModule(oop loader) {
3975 assert(is_instance(loader), "loader must be oop");
3976 return loader->obj_field(unnamedModule_offset);
3977 }
3978
3979 // Support for java_lang_System
3980 //
3981 #define SYSTEM_FIELDS_DO(macro) \
3982 macro(static_in_offset, k, "in", input_stream_signature, true); \
3983 macro(static_out_offset, k, "out", print_stream_signature, true); \
3984 macro(static_err_offset, k, "err", print_stream_signature, true); \
3985 macro(static_security_offset, k, "security", security_manager_signature, true)
3986
3987 void java_lang_System::compute_offsets() {
3988 InstanceKlass* k = SystemDictionary::System_klass();
3989 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3990 }
3991
3992 #if INCLUDE_CDS
3993 void java_lang_System::serialize_offsets(SerializeClosure* f) {
3994 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3995 }
3996 #endif
3997
3998 int java_lang_System::in_offset_in_bytes() { return static_in_offset; }
3999 int java_lang_System::out_offset_in_bytes() { return static_out_offset; }
4000 int java_lang_System::err_offset_in_bytes() { return static_err_offset; }
4001
4002 int java_lang_Class::_klass_offset;
4003 int java_lang_Class::_array_klass_offset;
4004 int java_lang_Class::_oop_size_offset;
4005 int java_lang_Class::_static_oop_field_count_offset;
4006 int java_lang_Class::_class_loader_offset;
4007 int java_lang_Class::_module_offset;
4008 int java_lang_Class::_protection_domain_offset;
4009 int java_lang_Class::_component_mirror_offset;
4010 int java_lang_Class::_init_lock_offset;
4011 int java_lang_Class::_signers_offset;
4012 int java_lang_Class::_name_offset;
4013 int java_lang_Class::_source_file_offset;
4014 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
4015 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
4016 int java_lang_Throwable::backtrace_offset;
4017 int java_lang_Throwable::detailMessage_offset;
4018 int java_lang_Throwable::stackTrace_offset;
4019 int java_lang_Throwable::depth_offset;
4020 int java_lang_Throwable::static_unassigned_stacktrace_offset;
4021 int java_lang_reflect_AccessibleObject::override_offset;
4022 int java_lang_reflect_Method::clazz_offset;
4023 int java_lang_reflect_Method::name_offset;
4024 int java_lang_reflect_Method::returnType_offset;
4025 int java_lang_reflect_Method::parameterTypes_offset;
4026 int java_lang_reflect_Method::exceptionTypes_offset;
4027 int java_lang_reflect_Method::slot_offset;
4028 int java_lang_reflect_Method::modifiers_offset;
4029 int java_lang_reflect_Method::signature_offset;
4030 int java_lang_reflect_Method::annotations_offset;
4031 int java_lang_reflect_Method::parameter_annotations_offset;
4032 int java_lang_reflect_Method::annotation_default_offset;
4033 int java_lang_reflect_Constructor::clazz_offset;
4034 int java_lang_reflect_Constructor::parameterTypes_offset;
4035 int java_lang_reflect_Constructor::exceptionTypes_offset;
4036 int java_lang_reflect_Constructor::slot_offset;
4037 int java_lang_reflect_Constructor::modifiers_offset;
4038 int java_lang_reflect_Constructor::signature_offset;
4039 int java_lang_reflect_Constructor::annotations_offset;
4040 int java_lang_reflect_Constructor::parameter_annotations_offset;
4041 int java_lang_reflect_Field::clazz_offset;
4042 int java_lang_reflect_Field::name_offset;
4043 int java_lang_reflect_Field::type_offset;
4044 int java_lang_reflect_Field::slot_offset;
4045 int java_lang_reflect_Field::modifiers_offset;
4046 int java_lang_reflect_Field::signature_offset;
4047 int java_lang_reflect_Field::annotations_offset;
4048 int java_lang_reflect_Parameter::name_offset;
4049 int java_lang_reflect_Parameter::modifiers_offset;
4050 int java_lang_reflect_Parameter::index_offset;
4051 int java_lang_reflect_Parameter::executable_offset;
4052 int java_lang_boxing_object::value_offset;
4053 int java_lang_boxing_object::long_value_offset;
4054 int java_lang_ref_Reference::referent_offset;
4055 int java_lang_ref_Reference::queue_offset;
4056 int java_lang_ref_Reference::next_offset;
4057 int java_lang_ref_Reference::discovered_offset;
4058 int java_lang_ref_SoftReference::timestamp_offset;
4059 int java_lang_ref_SoftReference::static_clock_offset;
4060 int java_lang_ClassLoader::parent_offset;
4061 int java_lang_System::static_in_offset;
4062 int java_lang_System::static_out_offset;
4063 int java_lang_System::static_err_offset;
4064 int java_lang_System::static_security_offset;
4065 int java_lang_StackTraceElement::methodName_offset;
4066 int java_lang_StackTraceElement::fileName_offset;
4067 int java_lang_StackTraceElement::lineNumber_offset;
4068 int java_lang_StackTraceElement::moduleName_offset;
4069 int java_lang_StackTraceElement::moduleVersion_offset;
4070 int java_lang_StackTraceElement::classLoaderName_offset;
4071 int java_lang_StackTraceElement::declaringClass_offset;
4072 int java_lang_StackTraceElement::declaringClassObject_offset;
4073 int java_lang_StackFrameInfo::_memberName_offset;
4074 int java_lang_StackFrameInfo::_bci_offset;
4075 int java_lang_StackFrameInfo::_version_offset;
4076 int java_lang_LiveStackFrameInfo::_monitors_offset;
4077 int java_lang_LiveStackFrameInfo::_locals_offset;
4078 int java_lang_LiveStackFrameInfo::_operands_offset;
4079 int java_lang_LiveStackFrameInfo::_mode_offset;
4080 int java_lang_AssertionStatusDirectives::classes_offset;
4081 int java_lang_AssertionStatusDirectives::classEnabled_offset;
4082 int java_lang_AssertionStatusDirectives::packages_offset;
4083 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
4084 int java_lang_AssertionStatusDirectives::deflt_offset;
4085 int java_nio_Buffer::_limit_offset;
4086 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4087 int reflect_ConstantPool::_oop_offset;
4088 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
4089
4090
4091 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4092 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4093 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4094 macro(moduleName_offset, k, "moduleName", string_signature, false); \
4095 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4096 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \
4097 macro(methodName_offset, k, "methodName", string_signature, false); \
4098 macro(fileName_offset, k, "fileName", string_signature, false); \
4099 macro(lineNumber_offset, k, "lineNumber", int_signature, false)
4100
4101 // Support for java_lang_StackTraceElement
4102 void java_lang_StackTraceElement::compute_offsets() {
4103 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
4104 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4105 }
4106
4107 #if INCLUDE_CDS
4108 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4109 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4110 }
4111 #endif
4112
4113 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4114 element->obj_field_put(fileName_offset, value);
4115 }
4116
4117 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4118 element->obj_field_put(declaringClass_offset, value);
4119 }
4120
4121 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4122 element->obj_field_put(methodName_offset, value);
4123 }
4124
4125 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4126 element->int_field_put(lineNumber_offset, value);
4127 }
4128
4129 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4130 element->obj_field_put(moduleName_offset, value);
4131 }
4132
4133 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4134 element->obj_field_put(moduleVersion_offset, value);
4135 }
4136
4137 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4138 element->obj_field_put(classLoaderName_offset, value);
4139 }
4140
4141 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4142 element->obj_field_put(declaringClassObject_offset, value);
4143 }
4144
4145 void java_lang_StackFrameInfo::set_version(oop element, short value) {
4146 element->short_field_put(_version_offset, value);
4147 }
4148
4149 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
4150 element->int_field_put(_bci_offset, value);
4151 }
4152
4153 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
4154 element->obj_field_put(_monitors_offset, value);
4155 }
4156
4157 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
4158 element->obj_field_put(_locals_offset, value);
4159 }
4160
4161 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
4162 element->obj_field_put(_operands_offset, value);
4163 }
4164
4165 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
4166 element->int_field_put(_mode_offset, value);
4167 }
4168
4169 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4170 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4171 macro(classes_offset, k, "classes", string_array_signature, false); \
4172 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4173 macro(packages_offset, k, "packages", string_array_signature, false); \
4174 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4175 macro(deflt_offset, k, "deflt", bool_signature, false)
4176
4177 void java_lang_AssertionStatusDirectives::compute_offsets() {
4178 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass();
4179 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4180 }
4181
4182 #if INCLUDE_CDS
4183 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4184 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4185 }
4186 #endif
4187
4188 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4189 o->obj_field_put(classes_offset, val);
4190 }
4191
4192 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4193 o->obj_field_put(classEnabled_offset, val);
4194 }
4195
4196 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4197 o->obj_field_put(packages_offset, val);
4198 }
4199
4200 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4201 o->obj_field_put(packageEnabled_offset, val);
4202 }
4203
4204 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4205 o->bool_field_put(deflt_offset, val);
4206 }
4207
4208
4209 // Support for intrinsification of java.nio.Buffer.checkIndex
4210 int java_nio_Buffer::limit_offset() {
4211 return _limit_offset;
4212 }
4213
4214 #define BUFFER_FIELDS_DO(macro) \
4215 macro(_limit_offset, k, "limit", int_signature, false)
4216
4217 void java_nio_Buffer::compute_offsets() {
4218 InstanceKlass* k = SystemDictionary::nio_Buffer_klass();
4219 assert(k != NULL, "must be loaded in 1.4+");
4220 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4221 }
4222
4223 #if INCLUDE_CDS
4224 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) {
4225 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4226 }
4227 #endif
4228
4229 #define AOS_FIELDS_DO(macro) \
4230 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4231
4232 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4233 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4234 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4235 }
4236
4237 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4238 assert(_owner_offset != 0, "Must be initialized");
4239 return obj->obj_field(_owner_offset);
4240 }
4241
4242 #if INCLUDE_CDS
4243 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4244 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4245 }
4246 #endif
4247
4248 static int member_offset(int hardcoded_offset) {
4249 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes();
4250 }
4251
4252 // Compute hard-coded offsets
4253 // Invoked before SystemDictionary::initialize, so pre-loaded classes
4254 // are not available to determine the offset_of_static_fields.
4255 void JavaClasses::compute_hard_coded_offsets() {
4256
4257 // java_lang_boxing_object
4258 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset);
4259 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong);
4260
4261 // java_lang_ref_Reference
4262 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset);
4263 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset);
4264 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset);
4265 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset);
4266 }
4267
4268 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
4269
4270 // Compute non-hard-coded field offsets of all the classes in this file
4271 void JavaClasses::compute_offsets() {
4272 if (UseSharedSpaces) {
4273 assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
4274 JvmtiExport::has_early_class_hook_env()),
4275 "JavaClasses::compute_offsets() must be called in early JVMTI phase.");
4276 // None of the classes used by the rest of this function can be replaced by
4277 // JMVTI ClassFileLoadHook.
4278 // We are safe to use the archived offsets, which have already been restored
4279 // by JavaClasses::serialize_offsets, without computing the offsets again.
4280 return;
4281 }
4282
4283 // We have already called the compute_offsets() of the
4284 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class)
4285 // earlier inside SystemDictionary::resolve_well_known_classes()
4286 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
4287
4288 // generated interpreter code wants to know about the offsets we just computed:
4289 AbstractAssembler::update_delayed_values();
4290 }
4291
4292 #if INCLUDE_CDS
4293 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
4294
4295 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
4296 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
4297 }
4298 #endif
4299
4300
4301 #ifndef PRODUCT
4302
4303 // These functions exist to assert the validity of hard-coded field offsets to guard
4304 // against changes in the class files
4305
4306 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
4307 EXCEPTION_MARK;
4308 fieldDescriptor fd;
4309 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
4310 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
4311 InstanceKlass* ik = InstanceKlass::cast(k);
4312 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
4313 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
4314 if (!ik->find_local_field(f_name, f_sig, &fd)) {
4315 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
4316 return false;
4317 }
4318 if (fd.is_static()) {
4319 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
4320 return false;
4321 }
4322 if (fd.offset() == hardcoded_offset ) {
4323 return true;
4324 } else {
4325 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
4326 klass_name, field_name, hardcoded_offset, fd.offset());
4327 return false;
4328 }
4329 }
4330
4331 // Check the hard-coded field offsets of all the classes in this file
4332
4333 void JavaClasses::check_offsets() {
4334 bool valid = true;
4335
4336 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4337 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
4338
4339 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4340 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
4341
4342 // Boxed primitive objects (java_lang_boxing_object)
4343
4344 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
4345 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4346 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
4347 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4348 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
4349 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
4350 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
4351 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4352
4353 // java.lang.ref.Reference
4354
4355 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4356 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4357 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4358 // Fake field
4359 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4360
4361 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4362 }
4363
4364 #endif // PRODUCT
4365
4366 int InjectedField::compute_offset() {
4367 InstanceKlass* ik = InstanceKlass::cast(klass());
4368 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4369 if (!may_be_java && !fs.access_flags().is_internal()) {
4370 // Only look at injected fields
4371 continue;
4372 }
4373 if (fs.name() == name() && fs.signature() == signature()) {
4374 return fs.offset();
4375 }
4376 }
4377 ResourceMark rm;
4378 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)" : "");
4379 #ifndef PRODUCT
4380 ik->print();
4381 tty->print_cr("all fields:");
4382 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4383 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4384 }
4385 #endif //PRODUCT
4386 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
4387 return -1;
4388 }
4389
4390 void javaClasses_init() {
4391 JavaClasses::compute_offsets();
4392 JavaClasses::check_offsets();
4393 FilteredFieldsMap::initialize(); // must be done after computing offsets.
4394 }