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