1 /*
2 * Copyright (c) 1997, 2024, 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 "cds/archiveBuilder.hpp"
27 #include "cds/archiveHeapLoader.hpp"
28 #include "cds/cdsConfig.hpp"
29 #include "cds/heapShared.hpp"
30 #include "cds/metaspaceShared.hpp"
31 #include "classfile/altHashing.hpp"
32 #include "classfile/classLoaderData.inline.hpp"
33 #include "classfile/javaClasses.inline.hpp"
34 #include "classfile/javaClassesImpl.hpp"
35 #include "classfile/javaThreadStatus.hpp"
36 #include "classfile/moduleEntry.hpp"
37 #include "classfile/stringTable.hpp"
38 #include "classfile/symbolTable.hpp"
39 #include "classfile/systemDictionary.hpp"
40 #include "classfile/vmClasses.hpp"
41 #include "classfile/vmSymbols.hpp"
42 #include "code/debugInfo.hpp"
43 #include "code/dependencyContext.hpp"
44 #include "code/pcDesc.hpp"
45 #include "gc/shared/collectedHeap.inline.hpp"
46 #include "interpreter/interpreter.hpp"
47 #include "interpreter/linkResolver.hpp"
48 #include "jvm.h"
49 #include "logging/log.hpp"
50 #include "logging/logStream.hpp"
51 #include "memory/oopFactory.hpp"
52 #include "memory/resourceArea.hpp"
53 #include "memory/universe.hpp"
54 #include "oops/fieldInfo.hpp"
55 #include "oops/fieldStreams.inline.hpp"
56 #include "oops/instanceKlass.inline.hpp"
57 #include "oops/instanceMirrorKlass.hpp"
58 #include "oops/klass.hpp"
59 #include "oops/klass.inline.hpp"
60 #include "oops/method.inline.hpp"
61 #include "oops/objArrayKlass.hpp"
62 #include "oops/objArrayOop.inline.hpp"
63 #include "oops/oopCast.inline.hpp"
64 #include "oops/oop.inline.hpp"
65 #include "oops/symbol.hpp"
66 #include "oops/recordComponent.hpp"
67 #include "oops/typeArrayOop.inline.hpp"
68 #include "prims/jvmtiExport.hpp"
69 #include "prims/methodHandles.hpp"
70 #include "prims/resolvedMethodTable.hpp"
71 #include "runtime/continuationEntry.inline.hpp"
72 #include "runtime/continuationJavaClasses.inline.hpp"
73 #include "runtime/fieldDescriptor.inline.hpp"
74 #include "runtime/frame.inline.hpp"
75 #include "runtime/handles.inline.hpp"
76 #include "runtime/handshake.hpp"
77 #include "runtime/init.hpp"
78 #include "runtime/interfaceSupport.inline.hpp"
79 #include "runtime/java.hpp"
80 #include "runtime/javaCalls.hpp"
81 #include "runtime/javaThread.hpp"
82 #include "runtime/jniHandles.inline.hpp"
83 #include "runtime/reflectionUtils.hpp"
84 #include "runtime/safepoint.hpp"
85 #include "runtime/safepointVerifiers.hpp"
86 #include "runtime/threadSMR.hpp"
87 #include "runtime/vframe.inline.hpp"
88 #include "runtime/vm_version.hpp"
89 #include "utilities/align.hpp"
90 #include "utilities/globalDefinitions.hpp"
91 #include "utilities/growableArray.hpp"
92 #include "utilities/preserveException.hpp"
93 #include "utilities/utf8.hpp"
94 #if INCLUDE_JVMCI
95 #include "jvmci/jvmciJavaClasses.hpp"
96 #endif
97
98 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
99 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
100
101 InjectedField JavaClasses::_injected_fields[] = {
102 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
103 };
104
105 // Register native methods of Object
106 void java_lang_Object::register_natives(TRAPS) {
107 InstanceKlass* obj = vmClasses::Object_klass();
108 Method::register_native(obj, vmSymbols::hashCode_name(),
109 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
110 Method::register_native(obj, vmSymbols::wait_name(),
111 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
112 Method::register_native(obj, vmSymbols::notify_name(),
113 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
114 Method::register_native(obj, vmSymbols::notifyAll_name(),
115 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
116 Method::register_native(obj, vmSymbols::clone_name(),
117 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
118 }
119
120 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
121 return _injected_fields[(int)id].compute_offset();
122 }
123
124 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
125 *field_count = 0;
126
127 vmSymbolID sid = vmSymbols::find_sid(class_name);
128 if (sid == vmSymbolID::NO_SID) {
129 // Only well known classes can inject fields
130 return nullptr;
131 }
132
133 int count = 0;
134 int start = -1;
135
136 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
137 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \
138 count++; \
139 if (start == -1) { \
140 start = (int)InjectedFieldID::klass##_##name##_enum; \
141 } \
142 }
143 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
144 #undef LOOKUP_INJECTED_FIELD
145
146 if (start != -1) {
147 *field_count = count;
148 return _injected_fields + start;
149 }
150 return nullptr;
151 }
152
153
154 // Helpful routine for computing field offsets at run time rather than hardcoding them
155 // Finds local fields only, including static fields. Static field offsets are from the
156 // beginning of the mirror.
157 void JavaClasses::compute_offset(int &dest_offset,
158 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
159 bool is_static) {
160 fieldDescriptor fd;
161 if (ik == nullptr) {
162 ResourceMark rm;
163 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
164 vm_exit_during_initialization("Invalid layout of well-known class");
165 }
166
167 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
168 ResourceMark rm;
169 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
170 name_symbol->as_C_string(), signature_symbol->as_C_string());
171 #ifndef PRODUCT
172 // Prints all fields and offsets
173 Log(class) lt;
174 LogStream ls(lt.error());
175 ik->print_on(&ls);
176 #endif //PRODUCT
177 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
178 }
179 dest_offset = fd.offset();
180 }
181
182 // Overloading to pass name as a string.
183 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
184 const char* name_string, Symbol* signature_symbol,
185 bool is_static) {
186 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
187 if (name == nullptr) {
188 ResourceMark rm;
189 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
190 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
191 }
192 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
193 }
194
195 // java_lang_String
196
197 int java_lang_String::_value_offset;
198 int java_lang_String::_hash_offset;
199 int java_lang_String::_hashIsZero_offset;
200 int java_lang_String::_coder_offset;
201 int java_lang_String::_flags_offset;
202
203 bool java_lang_String::_initialized;
204
205
206 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
207 uint8_t* addr = flags_addr(java_string);
208 uint8_t value = Atomic::load(addr);
209 while ((value & flag_mask) == 0) {
210 uint8_t old_value = value;
211 value |= flag_mask;
212 value = Atomic::cmpxchg(addr, old_value, value);
213 if (value == old_value) return false; // Flag bit changed from 0 to 1.
214 }
215 return true; // Flag bit is already 1.
216 }
217
218 #define STRING_FIELDS_DO(macro) \
219 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
220 macro(_hash_offset, k, "hash", int_signature, false); \
221 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
222 macro(_coder_offset, k, "coder", byte_signature, false);
223
224 void java_lang_String::compute_offsets() {
225 if (_initialized) {
226 return;
227 }
228
229 InstanceKlass* k = vmClasses::String_klass();
230 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
231 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
232
233 _initialized = true;
234 }
235
236 #if INCLUDE_CDS
237 void java_lang_String::serialize_offsets(SerializeClosure* f) {
238 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
239 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
240 f->do_bool(&_initialized);
241 }
242 #endif
243
244 class CompactStringsFixup : public FieldClosure {
245 private:
246 bool _value;
247
248 public:
249 CompactStringsFixup(bool value) : _value(value) {}
250
251 void do_field(fieldDescriptor* fd) {
252 if (fd->name() == vmSymbols::compact_strings_name()) {
253 oop mirror = fd->field_holder()->java_mirror();
254 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String");
255 assert(mirror != nullptr, "String must have mirror already");
256 mirror->bool_field_put(fd->offset(), _value);
257 }
258 }
259 };
260
261 void java_lang_String::set_compact_strings(bool value) {
262 CompactStringsFixup fix(value);
263 vmClasses::String_klass()->do_local_static_fields(&fix);
264 }
265
266 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
267 assert(_initialized, "Must be initialized");
268 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
269
270 // Create the String object first, so there's a chance that the String
271 // and the char array it points to end up in the same cache line.
272 oop obj;
273 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH);
274
275 // Create the char array. The String object must be handlized here
276 // because GC can happen as a result of the allocation attempt.
277 Handle h_obj(THREAD, obj);
278 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
279 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
280
281 // Point the String at the char array
282 obj = h_obj();
283 set_value(obj, buffer);
284 // No need to zero the offset, allocation zero'ed the entire String object
285 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
286 return h_obj;
287 }
288
289 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
290 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
291 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
292 typeArrayOop buffer = value(h_obj());
293 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
294 if (is_latin1) {
295 for (int index = 0; index < length; index++) {
296 buffer->byte_at_put(index, (jbyte)unicode[index]);
297 }
298 } else {
299 for (int index = 0; index < length; index++) {
300 buffer->char_at_put(index, unicode[index]);
301 }
302 }
303
304 #ifdef ASSERT
305 {
306 ResourceMark rm;
307 char* expected = UNICODE::as_utf8(unicode, length);
308 char* actual = as_utf8_string(h_obj());
309 if (strcmp(expected, actual) != 0) {
310 fatal("Unicode conversion failure: %s --> %s", expected, actual);
311 }
312 }
313 #endif
314
315 return h_obj;
316 }
317
318 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
319 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
320 return h_obj();
321 }
322
323 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
324 if (utf8_str == nullptr) {
325 return Handle();
326 }
327 bool has_multibyte, is_latin1;
328 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
329 if (!CompactStrings) {
330 has_multibyte = true;
331 is_latin1 = false;
332 }
333
334 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
335 if (length > 0) {
336 if (!has_multibyte) {
337 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
338 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
339 } else if (is_latin1) {
340 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
341 } else {
342 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
343 }
344 }
345
346 #ifdef ASSERT
347 // This check is too strict when the input string is not a valid UTF8.
348 // For example, it may be created with arbitrary content via jni_NewStringUTF.
349 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, (int)strlen(utf8_str), false)) {
350 ResourceMark rm;
351 const char* expected = utf8_str;
352 char* actual = as_utf8_string(h_obj());
353 if (strcmp(expected, actual) != 0) {
354 fatal("String conversion failure: %s --> %s", expected, actual);
355 }
356 }
357 #endif
358
359 return h_obj;
360 }
361
362 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
363 Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
364 return h_obj();
365 }
366
367 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
368 const char* utf8_str = (char*)symbol->bytes();
369 int utf8_len = symbol->utf8_length();
370
371 bool has_multibyte, is_latin1;
372 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
373 if (!CompactStrings) {
374 has_multibyte = true;
375 is_latin1 = false;
376 }
377
378 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
379 if (length > 0) {
380 if (!has_multibyte) {
381 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
382 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
383 } else if (is_latin1) {
384 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
385 } else {
386 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
387 }
388 }
389
390 #ifdef ASSERT
391 {
392 ResourceMark rm;
393 const char* expected = symbol->as_utf8();
394 char* actual = as_utf8_string(h_obj());
395 if (strncmp(expected, actual, utf8_len) != 0) {
396 fatal("Symbol conversion failure: %s --> %s", expected, actual);
397 }
398 }
399 #endif
400
401 return h_obj;
402 }
403
404 // Converts a C string to a Java String based on current encoding
405 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
406 assert(str != nullptr, "bad arguments");
407
408 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
409 static to_java_string_fn_t _to_java_string_fn = nullptr;
410
411 if (_to_java_string_fn == nullptr) {
412 void *lib_handle = os::native_java_library();
413 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
414 #if defined(_WIN32) && !defined(_WIN64)
415 if (_to_java_string_fn == nullptr) {
416 // On 32 bit Windows, also try __stdcall decorated name
417 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8"));
418 }
419 #endif
420 if (_to_java_string_fn == nullptr) {
421 fatal("JNU_NewStringPlatform missing");
422 }
423 }
424
425 jstring js = nullptr;
426 {
427 JavaThread* thread = THREAD;
428 HandleMark hm(thread);
429 ThreadToNativeFromVM ttn(thread);
430 js = (_to_java_string_fn)(thread->jni_environment(), str);
431 }
432
433 Handle native_platform_string(THREAD, JNIHandles::resolve(js));
434 JNIHandles::destroy_local(js); // destroy local JNIHandle.
435 return native_platform_string;
436 }
437
438 // Converts a Java String to a native C string that can be used for
439 // native OS calls.
440 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
441 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
442 static to_platform_string_fn_t _to_platform_string_fn = nullptr;
443
444 if (_to_platform_string_fn == nullptr) {
445 void *lib_handle = os::native_java_library();
446 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
447 if (_to_platform_string_fn == nullptr) {
448 fatal("GetStringPlatformChars missing");
449 }
450 }
451
452 char *native_platform_string;
453 jstring js;
454 { JavaThread* thread = THREAD;
455 js = (jstring) JNIHandles::make_local(thread, java_string());
456 HandleMark hm(thread);
457 ThreadToNativeFromVM ttn(thread);
458 JNIEnv *env = thread->jni_environment();
459 bool is_copy;
460 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
461 assert(is_copy == JNI_TRUE, "is_copy value changed");
462 }
463
464 // Uses a store barrier and therefore needs to be in vm state
465 JNIHandles::destroy_local(js);
466
467 return native_platform_string;
468 }
469
470 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
471 ResourceMark rm(THREAD);
472 return create_from_str(java_name->as_klass_external_name(), THREAD);
473 }
474
475 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
476 jchar* result = as_unicode_string_or_null(java_string, length);
477 if (result == nullptr) {
478 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
479 }
480 return result;
481 }
482
483 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
484 typeArrayOop value = java_lang_String::value(java_string);
485 length = java_lang_String::length(java_string, value);
486 bool is_latin1 = java_lang_String::is_latin1(java_string);
487
488 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
489 if (result != nullptr) {
490 if (!is_latin1) {
491 for (int index = 0; index < length; index++) {
492 result[index] = value->char_at(index);
493 }
494 } else {
495 for (int index = 0; index < length; index++) {
496 result[index] = ((jchar) value->byte_at(index)) & 0xff;
497 }
498 }
499 }
500 return result;
501 }
502
503 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
504 // The hash and hashIsZero fields are subject to a benign data race,
505 // making it crucial to ensure that any observable result of the
506 // calculation in this method stays correct under any possible read of
507 // these fields. Necessary restrictions to allow this to be correct
508 // without explicit memory fences or similar concurrency primitives is
509 // that we can ever only write to one of these two fields for a given
510 // String instance, and that the computation is idempotent and derived
511 // from immutable state
512 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
513 if (java_lang_String::hash_is_set(java_string)) {
514 return java_string->int_field(_hash_offset);
515 }
516
517 typeArrayOop value = java_lang_String::value(java_string);
518 int length = java_lang_String::length(java_string, value);
519 bool is_latin1 = java_lang_String::is_latin1(java_string);
520
521 unsigned int hash = 0;
522 if (length > 0) {
523 if (is_latin1) {
524 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
525 } else {
526 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
527 }
528 }
529
530 if (update) {
531 if (hash != 0) {
532 java_string->int_field_put(_hash_offset, hash);
533 } else {
534 java_string->bool_field_put(_hashIsZero_offset, true);
535 }
536 }
537 return hash;
538 }
539
540 unsigned int java_lang_String::hash_code(oop java_string) {
541 return hash_code_impl(java_string, /*update=*/true);
542 }
543
544 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
545 return hash_code_impl(java_string, /*update=*/false);
546 }
547
548
549 char* java_lang_String::as_quoted_ascii(oop java_string) {
550 typeArrayOop value = java_lang_String::value(java_string);
551 int length = java_lang_String::length(java_string, value);
552 bool is_latin1 = java_lang_String::is_latin1(java_string);
553
554 if (length == 0) return nullptr;
555
556 char* result;
557 int result_length;
558 if (!is_latin1) {
559 jchar* base = value->char_at_addr(0);
560 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
561 result = NEW_RESOURCE_ARRAY(char, result_length);
562 UNICODE::as_quoted_ascii(base, length, result, result_length);
563 } else {
564 jbyte* base = value->byte_at_addr(0);
565 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
566 result = NEW_RESOURCE_ARRAY(char, result_length);
567 UNICODE::as_quoted_ascii(base, length, result, result_length);
568 }
569 assert(result_length >= length + 1, "must not be shorter");
570 assert(result_length == (int)strlen(result) + 1, "must match");
571 return result;
572 }
573
574 Symbol* java_lang_String::as_symbol(oop java_string) {
575 typeArrayOop value = java_lang_String::value(java_string);
576 int length = java_lang_String::length(java_string, value);
577 bool is_latin1 = java_lang_String::is_latin1(java_string);
578 if (!is_latin1) {
579 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
580 Symbol* sym = SymbolTable::new_symbol(base, length);
581 return sym;
582 } else {
583 ResourceMark rm;
584 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
585 const char* base = UNICODE::as_utf8(position, length);
586 Symbol* sym = SymbolTable::new_symbol(base, length);
587 return sym;
588 }
589 }
590
591 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
592 typeArrayOop value = java_lang_String::value(java_string);
593 int length = java_lang_String::length(java_string, value);
594 bool is_latin1 = java_lang_String::is_latin1(java_string);
595 if (!is_latin1) {
596 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
597 return SymbolTable::probe_unicode(base, length);
598 } else {
599 ResourceMark rm;
600 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
601 const char* base = UNICODE::as_utf8(position, length);
602 return SymbolTable::probe(base, length);
603 }
604 }
605
606 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
607 assert(value_equals(value, java_lang_String::value(java_string)),
608 "value must be same as java_lang_String::value(java_string)");
609 int length = java_lang_String::length(java_string, value);
610 if (length == 0) {
611 return 0;
612 }
613 if (!java_lang_String::is_latin1(java_string)) {
614 return UNICODE::utf8_length(value->char_at_addr(0), length);
615 } else {
616 return UNICODE::utf8_length(value->byte_at_addr(0), length);
617 }
618 }
619
620 int java_lang_String::utf8_length(oop java_string) {
621 typeArrayOop value = java_lang_String::value(java_string);
622 return utf8_length(java_string, value);
623 }
624
625 char* java_lang_String::as_utf8_string(oop java_string) {
626 int length;
627 return as_utf8_string(java_string, length);
628 }
629
630 char* java_lang_String::as_utf8_string(oop java_string, int& length) {
631 typeArrayOop value = java_lang_String::value(java_string);
632 length = java_lang_String::length(java_string, value);
633 bool is_latin1 = java_lang_String::is_latin1(java_string);
634 if (!is_latin1) {
635 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
636 return UNICODE::as_utf8(position, length);
637 } else {
638 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
639 return UNICODE::as_utf8(position, length);
640 }
641 }
642
643 // Uses a provided buffer if it's sufficiently large, otherwise allocates
644 // a resource array to fit
645 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, int buflen, int& utf8_len) {
646 typeArrayOop value = java_lang_String::value(java_string);
647 int len = java_lang_String::length(java_string, value);
648 bool is_latin1 = java_lang_String::is_latin1(java_string);
649 if (!is_latin1) {
650 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
651 utf8_len = UNICODE::utf8_length(position, len);
652 if (utf8_len >= buflen) {
653 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
654 }
655 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
656 } else {
657 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
658 utf8_len = UNICODE::utf8_length(position, len);
659 if (utf8_len >= buflen) {
660 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
661 }
662 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
663 }
664 }
665
666 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) {
667 assert(value_equals(value, java_lang_String::value(java_string)),
668 "value must be same as java_lang_String::value(java_string)");
669 int length = java_lang_String::length(java_string, value);
670 bool is_latin1 = java_lang_String::is_latin1(java_string);
671 if (!is_latin1) {
672 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
673 return UNICODE::as_utf8(position, length, buf, buflen);
674 } else {
675 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
676 return UNICODE::as_utf8(position, length, buf, buflen);
677 }
678 }
679
680 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
681 typeArrayOop value = java_lang_String::value(java_string);
682 return as_utf8_string(java_string, value, buf, buflen);
683 }
684
685 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
686 typeArrayOop value = java_lang_String::value(java_string);
687 bool is_latin1 = java_lang_String::is_latin1(java_string);
688 assert(start + len <= java_lang_String::length(java_string), "just checking");
689 if (!is_latin1) {
690 jchar* position = value->char_at_addr(start);
691 return UNICODE::as_utf8(position, len);
692 } else {
693 jbyte* position = value->byte_at_addr(start);
694 return UNICODE::as_utf8(position, len);
695 }
696 }
697
698 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) {
699 assert(value_equals(value, java_lang_String::value(java_string)),
700 "value must be same as java_lang_String::value(java_string)");
701 assert(start + len <= java_lang_String::length(java_string), "just checking");
702 bool is_latin1 = java_lang_String::is_latin1(java_string);
703 if (!is_latin1) {
704 jchar* position = value->char_at_addr(start);
705 return UNICODE::as_utf8(position, len, buf, buflen);
706 } else {
707 jbyte* position = value->byte_at_addr(start);
708 return UNICODE::as_utf8(position, len, buf, buflen);
709 }
710 }
711
712 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
713 assert(java_string->klass() == vmClasses::String_klass(),
714 "must be java_string");
715 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
716 int length = java_lang_String::length(java_string, value);
717 if (length != len) {
718 return false;
719 }
720 bool is_latin1 = java_lang_String::is_latin1(java_string);
721 if (!is_latin1) {
722 for (int i = 0; i < len; i++) {
723 if (value->char_at(i) != chars[i]) {
724 return false;
725 }
726 }
727 } else {
728 for (int i = 0; i < len; i++) {
729 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
730 return false;
731 }
732 }
733 }
734 return true;
735 }
736
737 bool java_lang_String::equals(oop str1, oop str2) {
738 assert(str1->klass() == vmClasses::String_klass(),
739 "must be java String");
740 assert(str2->klass() == vmClasses::String_klass(),
741 "must be java String");
742 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
743 bool is_latin1 = java_lang_String::is_latin1(str1);
744 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
745 bool is_latin2 = java_lang_String::is_latin1(str2);
746
747 if (is_latin1 != is_latin2) {
748 // Strings with different coders are never equal.
749 return false;
750 }
751 return value_equals(value1, value2);
752 }
753
754 void java_lang_String::print(oop java_string, outputStream* st) {
755 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
756 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
757
758 if (value == nullptr) {
759 // This can happen if, e.g., printing a String
760 // object before its initializer has been called
761 st->print("nullptr");
762 return;
763 }
764
765 int length = java_lang_String::length(java_string, value);
766 bool is_latin1 = java_lang_String::is_latin1(java_string);
767
768 st->print("\"");
769 for (int index = 0; index < length; index++) {
770 jchar c = (!is_latin1) ? value->char_at(index) :
771 ((jchar) value->byte_at(index)) & 0xff;
772 if (c < ' ') {
773 st->print("\\x%02X", c); // print control characters e.g. \x0A
774 } else {
775 st->print("%c", c);
776 }
777 }
778 st->print("\"");
779 }
780
781 // java_lang_Class
782
783 int java_lang_Class::_klass_offset;
784 int java_lang_Class::_array_klass_offset;
785 int java_lang_Class::_oop_size_offset;
786 int java_lang_Class::_static_oop_field_count_offset;
787 int java_lang_Class::_class_loader_offset;
788 int java_lang_Class::_module_offset;
789 int java_lang_Class::_protection_domain_offset;
790 int java_lang_Class::_component_mirror_offset;
791 int java_lang_Class::_signers_offset;
792 int java_lang_Class::_name_offset;
793 int java_lang_Class::_source_file_offset;
794 int java_lang_Class::_classData_offset;
795 int java_lang_Class::_classRedefinedCount_offset;
796
797 bool java_lang_Class::_offsets_computed = false;
798 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
799 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
800
801 #ifdef ASSERT
802 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
803 assert(fd->has_initial_value(), "caller should have checked this");
804 assert(fd->field_type() == T_OBJECT, "caller should have checked this");
805 assert(fd->signature() == vmSymbols::string_signature(), "just checking");
806 }
807 #endif
808
809 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
810 DEBUG_ONLY(assert_valid_static_string_field(fd);)
811 oop string = fd->string_initial_value(CHECK);
812 mirror()->obj_field_put(fd->offset(), string);
813 }
814
815 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
816 assert(fd->has_initial_value(), "caller should have checked this");
817 BasicType t = fd->field_type();
818 switch (t) {
819 case T_BYTE:
820 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value()));
821 break;
822 case T_BOOLEAN:
823 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value()));
824 break;
825 case T_CHAR:
826 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value()));
827 break;
828 case T_SHORT:
829 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value()));
830 break;
831 case T_INT:
832 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
833 break;
834 case T_FLOAT:
835 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
836 break;
837 case T_DOUBLE:
838 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
839 break;
840 case T_LONG:
841 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
842 break;
843 default:
844 // Illegal ConstantValue attribute in class file should have been
845 // caught during classfile parsing.
846 ShouldNotReachHere();
847 }
848 }
849
850 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
851 assert(mirror.not_null() && fd->is_static(), "just checking");
852 if (fd->has_initial_value()) {
853 if (fd->field_type() != T_OBJECT) {
854 initialize_static_primitive_field(fd, mirror);
855 } else {
856 initialize_static_string_field(fd, mirror, CHECK);
857 }
858 }
859 }
860
861 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
862 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
863
864 // If the offset was read from the shared archive, it was fixed up already
865 if (!k->is_shared()) {
866 if (k->is_instance_klass()) {
867 // During bootstrap, java.lang.Class wasn't loaded so static field
868 // offsets were computed without the size added it. Go back and
869 // update all the static field offsets to included the size.
870
871 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
872 // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
873 // static fields offsets are updated in this array before reencoding everything into
874 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
875
876 int java_fields;
877 int injected_fields;
878 InstanceKlass* ik = InstanceKlass::cast(k);
879 GrowableArray<FieldInfo>* fields =
880 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
881 &java_fields, &injected_fields);
882 for (int i = 0; i < fields->length(); i++) {
883 FieldInfo* fi = fields->adr_at(i);
884 if (fi->access_flags().is_static()) {
885 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
886 }
887 }
888 Array<u1>* old_stream = ik->fieldinfo_stream();
889 assert(fields->length() == (java_fields + injected_fields), "Must be");
890 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
891 ik->set_fieldinfo_stream(new_fis);
892 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
893 }
894 }
895
896 if (k->is_shared() && k->has_archived_mirror_index()) {
897 if (ArchiveHeapLoader::is_in_use()) {
898 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
899 assert(present, "Missing archived mirror for %s", k->external_name());
900 return;
901 } else {
902 k->clear_java_mirror_handle();
903 k->clear_archived_mirror_index();
904 }
905 }
906 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
907 }
908
909 void java_lang_Class::initialize_mirror_fields(Klass* k,
910 Handle mirror,
911 Handle protection_domain,
912 Handle classData,
913 TRAPS) {
914 // Set protection domain also
915 set_protection_domain(mirror(), protection_domain());
916
917 // Initialize static fields
918 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
919
920 // Set classData
921 set_class_data(mirror(), classData());
922 }
923
924 // Set the java.lang.Module module field in the java_lang_Class mirror
925 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
926 if (module.is_null()) {
927 // During startup, the module may be null only if java.base has not been defined yet.
928 // Put the class on the fixup_module_list to patch later when the java.lang.Module
929 // for java.base is known. But note that since we captured the null module another
930 // thread may have completed that initialization.
931
932 bool javabase_was_defined = false;
933 {
934 MutexLocker m1(current, Module_lock);
935 // Keep list of classes needing java.base module fixup
936 if (!ModuleEntryTable::javabase_defined()) {
937 assert(k->java_mirror() != nullptr, "Class's mirror is null");
938 k->class_loader_data()->inc_keep_alive();
939 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
940 fixup_module_field_list()->push(k);
941 } else {
942 javabase_was_defined = true;
943 }
944 }
945
946 // If java.base was already defined then patch this particular class with java.base.
947 if (javabase_was_defined) {
948 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
949 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr,
950 "Setting class module field, " JAVA_BASE_NAME " should be defined");
951 Handle javabase_handle(current, javabase_entry->module());
952 set_module(mirror(), javabase_handle());
953 }
954 } else {
955 assert(Universe::is_module_initialized() ||
956 (ModuleEntryTable::javabase_defined() &&
957 (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
958 "Incorrect java.lang.Module specification while creating mirror");
959 set_module(mirror(), module());
960 }
961 }
962
963 // Statically allocate fixup lists because they always get created.
964 void java_lang_Class::allocate_fixup_lists() {
965 GrowableArray<Klass*>* mirror_list =
966 new (mtClass) GrowableArray<Klass*>(40, mtClass);
967 set_fixup_mirror_list(mirror_list);
968
969 GrowableArray<Klass*>* module_list =
970 new (mtModule) GrowableArray<Klass*>(500, mtModule);
971 set_fixup_module_field_list(module_list);
972 }
973
974 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
975 Handle& mirror, Handle& comp_mirror, TRAPS) {
976 // Allocate mirror (java.lang.Class instance)
977 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
978 mirror = Handle(THREAD, mirror_oop);
979
980 // Setup indirection from mirror->klass
981 set_klass(mirror(), k);
982
983 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
984 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
985
986 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
987
988 // It might also have a component mirror. This mirror must already exist.
989 if (k->is_array_klass()) {
990 if (k->is_typeArray_klass()) {
991 BasicType type = TypeArrayKlass::cast(k)->element_type();
992 if (is_scratch) {
993 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
994 } else {
995 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
996 }
997 } else {
998 assert(k->is_objArray_klass(), "Must be");
999 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1000 assert(element_klass != nullptr, "Must have an element klass");
1001 if (is_scratch) {
1002 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1003 } else {
1004 comp_mirror = Handle(THREAD, element_klass->java_mirror());
1005 }
1006 }
1007 assert(comp_mirror() != nullptr, "must have a mirror");
1008
1009 // Two-way link between the array klass and its component mirror:
1010 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1011 set_component_mirror(mirror(), comp_mirror());
1012 // See below for ordering dependencies between field array_klass in component mirror
1013 // and java_mirror in this klass.
1014 } else {
1015 assert(k->is_instance_klass(), "Must be");
1016
1017 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD);
1018 if (HAS_PENDING_EXCEPTION) {
1019 // If any of the fields throws an exception like OOM remove the klass field
1020 // from the mirror so GC doesn't follow it after the klass has been deallocated.
1021 // This mirror looks like a primitive type, which logically it is because it
1022 // it represents no class.
1023 set_klass(mirror(), nullptr);
1024 return;
1025 }
1026 }
1027 }
1028
1029 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1030 Handle module, Handle protection_domain,
1031 Handle classData, TRAPS) {
1032 assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1033 assert(k->java_mirror() == nullptr, "should only assign mirror once");
1034
1035 // Use this moment of initialization to cache modifier_flags also,
1036 // to support Class.getModifiers(). Instance classes recalculate
1037 // the cached flags after the class file is parsed, but before the
1038 // class is put into the system dictionary.
1039 int computed_modifiers = k->compute_modifier_flags();
1040 k->set_modifier_flags(computed_modifiers);
1041 // Class_klass has to be loaded because it is used to allocate
1042 // the mirror.
1043 if (vmClasses::Class_klass_loaded()) {
1044 Handle mirror;
1045 Handle comp_mirror;
1046
1047 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1048
1049 // set the classLoader field in the java_lang_Class instance
1050 assert(class_loader() == k->class_loader(), "should be same");
1051 set_class_loader(mirror(), class_loader());
1052
1053 // Setup indirection from klass->mirror
1054 // after any exceptions can happen during allocations.
1055 k->set_java_mirror(mirror);
1056
1057 // Set the module field in the java_lang_Class instance. This must be done
1058 // after the mirror is set.
1059 set_mirror_module_field(THREAD, k, mirror, module);
1060
1061 if (comp_mirror() != nullptr) {
1062 // Set after k->java_mirror() is published, because compiled code running
1063 // concurrently doesn't expect a k to have a null java_mirror.
1064 release_set_array_klass(comp_mirror(), k);
1065 }
1066 if (CDSConfig::is_dumping_heap()) {
1067 create_scratch_mirror(k, CHECK);
1068 }
1069 } else {
1070 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1071 fixup_mirror_list()->push(k);
1072 }
1073 }
1074
1075 #if INCLUDE_CDS_JAVA_HEAP
1076 // The "scratch mirror" stores the states of the mirror object that can be
1077 // decided at dump time (such as the initial values of the static fields, the
1078 // component mirror, etc). At runtime, more information is added to it by
1079 // java_lang_Class::restore_archived_mirror().
1080 //
1081 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1082 // produces the same result as /*runtime*/create_mirror().
1083 //
1084 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1085 // latter may contain dumptime-specific information that cannot be archived
1086 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1087 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1088 if (k->class_loader() != nullptr &&
1089 k->class_loader() != SystemDictionary::java_platform_loader() &&
1090 k->class_loader() != SystemDictionary::java_system_loader()) {
1091 // We only archive the mirrors of classes loaded by the built-in loaders
1092 return;
1093 }
1094
1095 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1096 Handle mirror;
1097 Handle comp_mirror;
1098 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1099
1100 if (comp_mirror() != nullptr) {
1101 release_set_array_klass(comp_mirror(), k);
1102 }
1103
1104 HeapShared::set_scratch_java_mirror(k, mirror());
1105 }
1106
1107 // Returns true if the mirror is updated, false if no archived mirror
1108 // data is present. After the archived mirror object is restored, the
1109 // shared klass' _has_raw_archived_mirror flag is cleared.
1110 bool java_lang_Class::restore_archived_mirror(Klass *k,
1111 Handle class_loader, Handle module,
1112 Handle protection_domain, TRAPS) {
1113 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1114 // see more details in vmClasses::resolve_all().
1115 if (!vmClasses::Class_klass_loaded()) {
1116 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1117 fixup_mirror_list()->push(k);
1118 return true;
1119 }
1120
1121 oop m = k->archived_java_mirror();
1122 assert(m != nullptr, "must have stored non-null archived mirror");
1123
1124 // Sanity: clear it now to prevent re-initialization if any of the following fails
1125 k->clear_archived_mirror_index();
1126
1127 // mirror is archived, restore
1128 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1129 assert(as_Klass(m) == k, "must be");
1130 Handle mirror(THREAD, m);
1131
1132 if (!k->is_array_klass()) {
1133 // - local static final fields with initial values were initialized at dump time
1134
1135 if (protection_domain.not_null()) {
1136 set_protection_domain(mirror(), protection_domain());
1137 }
1138 }
1139
1140 assert(class_loader() == k->class_loader(), "should be same");
1141 if (class_loader.not_null()) {
1142 set_class_loader(mirror(), class_loader());
1143 }
1144
1145 k->set_java_mirror(mirror);
1146
1147 set_mirror_module_field(THREAD, k, mirror, module);
1148
1149 if (log_is_enabled(Trace, cds, heap, mirror)) {
1150 ResourceMark rm(THREAD);
1151 log_trace(cds, heap, mirror)(
1152 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1153 }
1154
1155 return true;
1156 }
1157 #endif // INCLUDE_CDS_JAVA_HEAP
1158
1159 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1160 assert(_module_offset != 0, "must have been computed already");
1161 set_module(k->java_mirror(), module());
1162 }
1163
1164 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1165 assert(_oop_size_offset != 0, "must be set");
1166 assert(size > 0, "Oop size must be greater than zero, not " SIZE_FORMAT, size);
1167 assert(size <= INT_MAX, "Lossy conversion: " SIZE_FORMAT, size);
1168 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1169 }
1170
1171 int java_lang_Class::static_oop_field_count(oop java_class) {
1172 assert(_static_oop_field_count_offset != 0, "must be set");
1173 return java_class->int_field(_static_oop_field_count_offset);
1174 }
1175
1176 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1177 assert(_static_oop_field_count_offset != 0, "must be set");
1178 java_class->int_field_put(_static_oop_field_count_offset, size);
1179 }
1180
1181 oop java_lang_Class::protection_domain(oop java_class) {
1182 assert(_protection_domain_offset != 0, "must be set");
1183 return java_class->obj_field(_protection_domain_offset);
1184 }
1185 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1186 assert(_protection_domain_offset != 0, "must be set");
1187 java_class->obj_field_put(_protection_domain_offset, pd);
1188 }
1189
1190 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1191 assert(_component_mirror_offset != 0, "must be set");
1192 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1193 }
1194 oop java_lang_Class::component_mirror(oop java_class) {
1195 assert(_component_mirror_offset != 0, "must be set");
1196 return java_class->obj_field(_component_mirror_offset);
1197 }
1198
1199 objArrayOop java_lang_Class::signers(oop java_class) {
1200 assert(_signers_offset != 0, "must be set");
1201 return (objArrayOop)java_class->obj_field(_signers_offset);
1202 }
1203 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1204 assert(_signers_offset != 0, "must be set");
1205 java_class->obj_field_put(_signers_offset, signers);
1206 }
1207
1208 oop java_lang_Class::class_data(oop java_class) {
1209 assert(_classData_offset != 0, "must be set");
1210 return java_class->obj_field(_classData_offset);
1211 }
1212 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1213 assert(_classData_offset != 0, "must be set");
1214 java_class->obj_field_put(_classData_offset, class_data);
1215 }
1216
1217 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1218 assert(_class_loader_offset != 0, "offsets should have been initialized");
1219 java_class->obj_field_put(_class_loader_offset, loader);
1220 }
1221
1222 oop java_lang_Class::class_loader(oop java_class) {
1223 assert(_class_loader_offset != 0, "must be set");
1224 return java_class->obj_field(_class_loader_offset);
1225 }
1226
1227 oop java_lang_Class::module(oop java_class) {
1228 assert(_module_offset != 0, "must be set");
1229 return java_class->obj_field(_module_offset);
1230 }
1231
1232 void java_lang_Class::set_module(oop java_class, oop module) {
1233 assert(_module_offset != 0, "must be set");
1234 java_class->obj_field_put(_module_offset, module);
1235 }
1236
1237 oop java_lang_Class::name(Handle java_class, TRAPS) {
1238 assert(_name_offset != 0, "must be set");
1239 oop o = java_class->obj_field(_name_offset);
1240 if (o == nullptr) {
1241 o = StringTable::intern(as_external_name(java_class()), THREAD);
1242 java_class->obj_field_put(_name_offset, o);
1243 }
1244 return o;
1245 }
1246
1247 oop java_lang_Class::source_file(oop java_class) {
1248 assert(_source_file_offset != 0, "must be set");
1249 return java_class->obj_field(_source_file_offset);
1250 }
1251
1252 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1253 assert(_source_file_offset != 0, "must be set");
1254 java_class->obj_field_put(_source_file_offset, source_file);
1255 }
1256
1257 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1258 // This should be improved by adding a field at the Java level or by
1259 // introducing a new VM klass (see comment in ClassFileParser)
1260 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1261 if (type != T_VOID) {
1262 Klass* aklass = Universe::typeArrayKlass(type);
1263 assert(aklass != nullptr, "correct bootstrap");
1264 release_set_array_klass(java_class, aklass);
1265 }
1266 #ifdef ASSERT
1267 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1268 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1269 #endif
1270 return java_class;
1271 }
1272
1273 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1274 assert(is_instance(java_class), "must be a Class object");
1275 java_class->metadata_field_put(_klass_offset, klass);
1276 }
1277
1278
1279 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1280 assert(is_instance(java_class), "must be a Class object");
1281 Symbol* name = nullptr;
1282 bool is_instance = false;
1283 if (is_primitive(java_class)) {
1284 name = vmSymbols::type_signature(primitive_type(java_class));
1285 } else {
1286 Klass* k = as_Klass(java_class);
1287 is_instance = k->is_instance_klass();
1288 name = k->name();
1289 }
1290 if (name == nullptr) {
1291 st->print("<null>");
1292 return;
1293 }
1294 if (is_instance) st->print("L");
1295 st->write((char*) name->base(), (int) name->utf8_length());
1296 if (is_instance) st->print(";");
1297 }
1298
1299 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1300 assert(is_instance(java_class), "must be a Class object");
1301 Symbol* name;
1302 if (is_primitive(java_class)) {
1303 name = vmSymbols::type_signature(primitive_type(java_class));
1304 // Because this can create a new symbol, the caller has to decrement
1305 // the refcount, so make adjustment here and below for symbols returned
1306 // that are not created or incremented due to a successful lookup.
1307 name->increment_refcount();
1308 } else {
1309 Klass* k = as_Klass(java_class);
1310 if (!k->is_instance_klass()) {
1311 name = k->name();
1312 name->increment_refcount();
1313 } else {
1314 ResourceMark rm;
1315 const char* sigstr = k->signature_name();
1316 int siglen = (int) strlen(sigstr);
1317 if (!intern_if_not_found) {
1318 name = SymbolTable::probe(sigstr, siglen);
1319 } else {
1320 name = SymbolTable::new_symbol(sigstr, siglen);
1321 }
1322 }
1323 }
1324 return name;
1325 }
1326
1327 // Returns the Java name for this Java mirror (Resource allocated)
1328 // See Klass::external_name().
1329 // For primitive type Java mirrors, its type name is returned.
1330 const char* java_lang_Class::as_external_name(oop java_class) {
1331 assert(is_instance(java_class), "must be a Class object");
1332 const char* name = nullptr;
1333 if (is_primitive(java_class)) {
1334 name = type2name(primitive_type(java_class));
1335 } else {
1336 name = as_Klass(java_class)->external_name();
1337 }
1338 if (name == nullptr) {
1339 name = "<null>";
1340 }
1341 return name;
1342 }
1343
1344 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1345 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1346 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass");
1347 return k;
1348 }
1349
1350
1351 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1352 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1353 java_class->release_metadata_field_put(_array_klass_offset, klass);
1354 }
1355
1356
1357 BasicType java_lang_Class::primitive_type(oop java_class) {
1358 assert(is_primitive(java_class), "just checking");
1359 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1360 BasicType type = T_VOID;
1361 if (ak != nullptr) {
1362 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1363 type = ArrayKlass::cast(ak)->element_type();
1364 } else {
1365 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1366 }
1367 #ifdef ASSERT
1368 if (CDSConfig::is_dumping_heap()) {
1369 oop mirror = Universe::java_mirror(type);
1370 oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1371 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1372 } else {
1373 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1374 }
1375 #endif
1376 return type;
1377 }
1378
1379 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1380 assert(is_instance(java_class), "must be a Class object");
1381 if (is_primitive(java_class)) {
1382 if (reference_klass != nullptr)
1383 (*reference_klass) = nullptr;
1384 return primitive_type(java_class);
1385 } else {
1386 if (reference_klass != nullptr)
1387 (*reference_klass) = as_Klass(java_class);
1388 return T_OBJECT;
1389 }
1390 }
1391
1392
1393 oop java_lang_Class::primitive_mirror(BasicType t) {
1394 oop mirror = Universe::java_mirror(t);
1395 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1396 assert(is_primitive(mirror), "must be primitive");
1397 return mirror;
1398 }
1399
1400 #define CLASS_FIELDS_DO(macro) \
1401 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1402 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1403 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1404 macro(_module_offset, k, "module", module_signature, false); \
1405 macro(_name_offset, k, "name", string_signature, false); \
1406 macro(_classData_offset, k, "classData", object_signature, false);
1407
1408 void java_lang_Class::compute_offsets() {
1409 if (_offsets_computed) {
1410 return;
1411 }
1412
1413 _offsets_computed = true;
1414
1415 InstanceKlass* k = vmClasses::Class_klass();
1416 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1417
1418 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1419 }
1420
1421 #if INCLUDE_CDS
1422 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1423 f->do_bool(&_offsets_computed);
1424
1425 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1426
1427 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1428 }
1429 #endif
1430
1431 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1432 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1433 return the_class_mirror->int_field(_classRedefinedCount_offset);
1434 }
1435
1436 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1437 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1438 the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1439 }
1440
1441
1442 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1443 // platform thread structure, and a eetop offset which was used for thread
1444 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1445 // merged, so in the HotSpot VM we just use the eetop field for the thread
1446 // instead of the privateInfo_offset.
1447 //
1448 // Note: The stackSize field is only present starting in 1.4.
1449
1450 int java_lang_Thread_FieldHolder::_group_offset;
1451 int java_lang_Thread_FieldHolder::_priority_offset;
1452 int java_lang_Thread_FieldHolder::_stackSize_offset;
1453 int java_lang_Thread_FieldHolder::_daemon_offset;
1454 int java_lang_Thread_FieldHolder::_thread_status_offset;
1455
1456 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1457 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1458 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1459 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1460 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1461 macro(_thread_status_offset, k, "threadStatus", int_signature, false)
1462
1463 void java_lang_Thread_FieldHolder::compute_offsets() {
1464 assert(_group_offset == 0, "offsets should be initialized only once");
1465
1466 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1467 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1468 }
1469
1470 #if INCLUDE_CDS
1471 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1472 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1473 }
1474 #endif
1475
1476 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1477 return holder->obj_field(_group_offset);
1478 }
1479
1480 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1481 return (ThreadPriority)holder->int_field(_priority_offset);
1482 }
1483
1484 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1485 holder->int_field_put(_priority_offset, priority);
1486 }
1487
1488 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1489 return holder->long_field(_stackSize_offset);
1490 }
1491
1492 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1493 return holder->bool_field(_daemon_offset) != 0;
1494 }
1495
1496 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1497 assert(val, "daemon status is never turned off");
1498 holder->bool_field_put(_daemon_offset, val);
1499 }
1500
1501 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1502 holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1503 }
1504
1505 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1506 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1507 }
1508
1509
1510 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1511
1512 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1513 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true);
1514
1515 void java_lang_Thread_Constants::compute_offsets() {
1516 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1517
1518 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1519 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1520 }
1521
1522 #if INCLUDE_CDS
1523 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1524 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1525 }
1526 #endif
1527
1528 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1529 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1530 oop base = k->static_field_base_raw();
1531 return base->obj_field(_static_VTHREAD_GROUP_offset);
1532 }
1533
1534
1535 int java_lang_Thread::_holder_offset;
1536 int java_lang_Thread::_name_offset;
1537 int java_lang_Thread::_contextClassLoader_offset;
1538 int java_lang_Thread::_inheritedAccessControlContext_offset;
1539 int java_lang_Thread::_eetop_offset;
1540 int java_lang_Thread::_jvmti_thread_state_offset;
1541 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1542 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1543 int java_lang_Thread::_interrupted_offset;
1544 int java_lang_Thread::_interruptLock_offset;
1545 int java_lang_Thread::_tid_offset;
1546 int java_lang_Thread::_continuation_offset;
1547 int java_lang_Thread::_park_blocker_offset;
1548 int java_lang_Thread::_scopedValueBindings_offset;
1549 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1550
1551 #define THREAD_FIELDS_DO(macro) \
1552 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \
1553 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1554 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1555 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1556 macro(_eetop_offset, k, "eetop", long_signature, false); \
1557 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1558 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \
1559 macro(_tid_offset, k, "tid", long_signature, false); \
1560 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1561 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1562 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1563
1564 void java_lang_Thread::compute_offsets() {
1565 assert(_holder_offset == 0, "offsets should be initialized only once");
1566
1567 InstanceKlass* k = vmClasses::Thread_klass();
1568 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1569 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1570 }
1571
1572 #if INCLUDE_CDS
1573 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1574 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1575 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1576 }
1577 #endif
1578
1579 JavaThread* java_lang_Thread::thread(oop java_thread) {
1580 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1581 }
1582
1583 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1584 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1585 }
1586
1587 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1588 java_thread->address_field_put(_eetop_offset, (address)thread);
1589 }
1590
1591 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1592 java_thread->release_address_field_put(_eetop_offset, (address)thread);
1593 }
1594
1595 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1596 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1597 }
1598
1599 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1600 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1601 }
1602
1603 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1604 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1605 }
1606
1607 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1608 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1609 int val = VTMS_transition_disable_count(java_thread);
1610 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1611 }
1612
1613 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1614 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1615 int val = VTMS_transition_disable_count(java_thread);
1616 assert(val > 0, "VTMS_transition_disable_count should never be negative");
1617 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1618 }
1619
1620 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1621 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1622 }
1623
1624 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1625 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1626 }
1627
1628 int java_lang_Thread::is_in_VTMS_transition_offset() {
1629 return _jvmti_is_in_VTMS_transition_offset;
1630 }
1631
1632 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1633 assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1634 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1635 }
1636
1637 oop java_lang_Thread::holder(oop java_thread) {
1638 // Note: may return null if the thread is still attaching
1639 return java_thread->obj_field(_holder_offset);
1640 }
1641 oop java_lang_Thread::interrupt_lock(oop java_thread) {
1642 return java_thread->obj_field(_interruptLock_offset);
1643 }
1644
1645 bool java_lang_Thread::interrupted(oop java_thread) {
1646 // Make sure the caller can safely access oops.
1647 assert(Thread::current()->is_VM_thread() ||
1648 (JavaThread::current()->thread_state() != _thread_blocked &&
1649 JavaThread::current()->thread_state() != _thread_in_native),
1650 "Unsafe access to oop");
1651 return java_thread->bool_field_volatile(_interrupted_offset);
1652 }
1653
1654 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1655 // Make sure the caller can safely access oops.
1656 assert(Thread::current()->is_VM_thread() ||
1657 (JavaThread::current()->thread_state() != _thread_blocked &&
1658 JavaThread::current()->thread_state() != _thread_in_native),
1659 "Unsafe access to oop");
1660 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1661 }
1662
1663
1664 oop java_lang_Thread::name(oop java_thread) {
1665 return java_thread->obj_field(_name_offset);
1666 }
1667
1668
1669 void java_lang_Thread::set_name(oop java_thread, oop name) {
1670 java_thread->obj_field_put(_name_offset, name);
1671 }
1672
1673 // Convenience macros for setting and getting Thread fields that
1674 // are actually stored in the FieldHolder object of the thread.
1675 // The FieldHolder can be null whilst a thread is attaching via
1676 // JNI, and when the main thread is attaching.
1677
1678 // The default value should be the default/zero initialized value
1679 // of the field as it would be in java.lang.Thread.FieldHolder.
1680 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \
1681 { \
1682 oop holder = java_lang_Thread::holder(java_thread); \
1683 if (holder != nullptr) \
1684 return java_lang_Thread_FieldHolder::field(holder); \
1685 else \
1686 return default_val; \
1687 }
1688
1689 // We should never be trying to set a field of an attaching thread.
1690 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \
1691 { \
1692 oop holder = java_lang_Thread::holder(java_thread); \
1693 assert(holder != nullptr, "Thread not fully initialized"); \
1694 java_lang_Thread_FieldHolder::set_##field(holder, value); \
1695 }
1696
1697
1698 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1699 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1700 }
1701
1702
1703 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1704 SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1705 }
1706
1707
1708 oop java_lang_Thread::threadGroup(oop java_thread) {
1709 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1710 }
1711
1712
1713 bool java_lang_Thread::is_alive(oop java_thread) {
1714 JavaThread* thr = java_lang_Thread::thread(java_thread);
1715 return (thr != nullptr);
1716 }
1717
1718
1719 bool java_lang_Thread::is_daemon(oop java_thread) {
1720 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1721 }
1722
1723
1724 void java_lang_Thread::set_daemon(oop java_thread) {
1725 SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1726 }
1727
1728 oop java_lang_Thread::context_class_loader(oop java_thread) {
1729 return java_thread->obj_field(_contextClassLoader_offset);
1730 }
1731
1732 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1733 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1734 }
1735
1736
1737 jlong java_lang_Thread::stackSize(oop java_thread) {
1738 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1739 }
1740
1741 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1742 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1743 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1744 }
1745
1746 // Read thread status value from threadStatus field in java.lang.Thread java class.
1747 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1748 // Make sure the caller is operating on behalf of the VM or is
1749 // running VM code (state == _thread_in_vm).
1750 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1751 JavaThread::current()->thread_state() == _thread_in_vm,
1752 "Java Thread is not running in vm");
1753 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1754 }
1755
1756 ByteSize java_lang_Thread::thread_id_offset() {
1757 return in_ByteSize(_tid_offset);
1758 }
1759
1760 oop java_lang_Thread::park_blocker(oop java_thread) {
1761 return java_thread->obj_field(_park_blocker_offset);
1762 }
1763
1764 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) {
1765 ThreadsListHandle tlh(JavaThread::current());
1766 JavaThread* thread;
1767 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread);
1768 if (is_virtual) {
1769 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread);
1770 if (carrier_thread == nullptr) {
1771 return nullptr;
1772 }
1773 thread = java_lang_Thread::thread(carrier_thread);
1774 } else {
1775 thread = java_lang_Thread::thread(java_thread);
1776 }
1777 if (thread == nullptr) {
1778 return nullptr;
1779 }
1780
1781 class GetStackTraceClosure : public HandshakeClosure {
1782 public:
1783 const Handle _java_thread;
1784 int _depth;
1785 bool _retry_handshake;
1786 GrowableArray<Method*>* _methods;
1787 GrowableArray<int>* _bcis;
1788
1789 GetStackTraceClosure(Handle java_thread) :
1790 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false),
1791 _methods(nullptr), _bcis(nullptr) {
1792 }
1793 ~GetStackTraceClosure() {
1794 delete _methods;
1795 delete _bcis;
1796 }
1797
1798 bool read_reset_retry() {
1799 bool ret = _retry_handshake;
1800 // If we re-execute the handshake this method need to return false
1801 // when the handshake cannot be performed. (E.g. thread terminating)
1802 _retry_handshake = false;
1803 return ret;
1804 }
1805
1806 void do_thread(Thread* th) {
1807 if (!Thread::current()->is_Java_thread()) {
1808 _retry_handshake = true;
1809 return;
1810 }
1811
1812 JavaThread* thread = JavaThread::cast(th);
1813
1814 if (!thread->has_last_Java_frame()) {
1815 return;
1816 }
1817
1818 bool carrier = false;
1819 if (java_lang_VirtualThread::is_instance(_java_thread())) {
1820 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
1821 const ContinuationEntry* ce = thread->vthread_continuation();
1822 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) {
1823 return; // not mounted
1824 }
1825 } else {
1826 carrier = (thread->vthread_continuation() != nullptr);
1827 }
1828
1829 const int max_depth = MaxJavaStackTraceDepth;
1830 const bool skip_hidden = !ShowHiddenFrames;
1831
1832 // Pick minimum length that will cover most cases
1833 int init_length = 64;
1834 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1835 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
1836
1837 int total_count = 0;
1838 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops
1839 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
1840 vfst.next()) {
1841
1842 if (skip_hidden && (vfst.method()->is_hidden() ||
1843 vfst.method()->is_continuation_enter_intrinsic())) {
1844 continue;
1845 }
1846
1847 _methods->push(vfst.method());
1848 _bcis->push(vfst.bci());
1849 total_count++;
1850 }
1851
1852 _depth = total_count;
1853 }
1854 };
1855
1856 // Handshake with target
1857 ResourceMark rm(THREAD);
1858 HandleMark hm(THREAD);
1859 GetStackTraceClosure gstc(Handle(THREAD, java_thread));
1860 do {
1861 Handshake::execute(&gstc, &tlh, thread);
1862 } while (gstc.read_reset_retry());
1863
1864 // Stop if no stack trace is found.
1865 if (gstc._depth == 0) {
1866 return nullptr;
1867 }
1868
1869 // Convert to StackTraceElement array
1870 InstanceKlass* k = vmClasses::StackTraceElement_klass();
1871 assert(k != nullptr, "must be loaded in 1.4+");
1872 if (k->should_be_initialized()) {
1873 k->initialize(CHECK_NULL);
1874 }
1875 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL);
1876
1877 for (int i = 0; i < gstc._depth; i++) {
1878 methodHandle method(THREAD, gstc._methods->at(i));
1879 oop element = java_lang_StackTraceElement::create(method,
1880 gstc._bcis->at(i),
1881 CHECK_NULL);
1882 trace->obj_at_put(i, element);
1883 }
1884
1885 return trace();
1886 }
1887
1888 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1889 JavaThreadStatus status = get_thread_status(java_thread);
1890 switch (status) {
1891 case JavaThreadStatus::NEW : return "NEW";
1892 case JavaThreadStatus::RUNNABLE : return "RUNNABLE";
1893 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)";
1894 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1895 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1896 case JavaThreadStatus::PARKED : return "WAITING (parking)";
1897 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)";
1898 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1899 case JavaThreadStatus::TERMINATED : return "TERMINATED";
1900 default : return "UNKNOWN";
1901 };
1902 }
1903 int java_lang_ThreadGroup::_parent_offset;
1904 int java_lang_ThreadGroup::_name_offset;
1905 int java_lang_ThreadGroup::_maxPriority_offset;
1906 int java_lang_ThreadGroup::_daemon_offset;
1907
1908 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1909 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1910 return java_thread_group->obj_field(_parent_offset);
1911 }
1912
1913 // ("name as oop" accessor is not necessary)
1914
1915 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1916 oop name = java_thread_group->obj_field(_name_offset);
1917 // ThreadGroup.name can be null
1918 if (name != nullptr) {
1919 return java_lang_String::as_utf8_string(name);
1920 }
1921 return nullptr;
1922 }
1923
1924 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1925 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1926 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1927 }
1928
1929 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1930 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1931 return java_thread_group->bool_field(_daemon_offset) != 0;
1932 }
1933
1934 #define THREADGROUP_FIELDS_DO(macro) \
1935 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1936 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1937 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1938 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false);
1939
1940 void java_lang_ThreadGroup::compute_offsets() {
1941 assert(_parent_offset == 0, "offsets should be initialized only once");
1942
1943 InstanceKlass* k = vmClasses::ThreadGroup_klass();
1944 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1945 }
1946
1947 #if INCLUDE_CDS
1948 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1949 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1950 }
1951 #endif
1952
1953
1954 // java_lang_VirtualThread
1955
1956 int java_lang_VirtualThread::static_vthread_scope_offset;
1957 int java_lang_VirtualThread::_carrierThread_offset;
1958 int java_lang_VirtualThread::_continuation_offset;
1959 int java_lang_VirtualThread::_state_offset;
1960
1961 #define VTHREAD_FIELDS_DO(macro) \
1962 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \
1963 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \
1964 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1965 macro(_state_offset, k, "state", int_signature, false)
1966
1967
1968 void java_lang_VirtualThread::compute_offsets() {
1969 InstanceKlass* k = vmClasses::VirtualThread_klass();
1970 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1971 }
1972
1973 bool java_lang_VirtualThread::is_instance(oop obj) {
1974 return obj != nullptr && is_subclass(obj->klass());
1975 }
1976
1977 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
1978 oop thread = vthread->obj_field(_carrierThread_offset);
1979 return thread;
1980 }
1981
1982 oop java_lang_VirtualThread::continuation(oop vthread) {
1983 oop cont = vthread->obj_field(_continuation_offset);
1984 return cont;
1985 }
1986
1987 int java_lang_VirtualThread::state(oop vthread) {
1988 return vthread->int_field_acquire(_state_offset);
1989 }
1990
1991 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
1992 JavaThreadStatus status = JavaThreadStatus::NEW;
1993 switch (state & ~SUSPENDED) {
1994 case NEW:
1995 status = JavaThreadStatus::NEW;
1996 break;
1997 case STARTED:
1998 case RUNNING:
1999 case PARKING:
2000 case TIMED_PARKING:
2001 case UNPARKED:
2002 case YIELDING:
2003 case YIELDED:
2004 status = JavaThreadStatus::RUNNABLE;
2005 break;
2006 case PARKED:
2007 case PINNED:
2008 status = JavaThreadStatus::PARKED;
2009 break;
2010 case TIMED_PARKED:
2011 case TIMED_PINNED:
2012 status = JavaThreadStatus::PARKED_TIMED;
2013 break;
2014 case TERMINATED:
2015 status = JavaThreadStatus::TERMINATED;
2016 break;
2017 default:
2018 ShouldNotReachHere();
2019 }
2020 return status;
2021 }
2022
2023 #if INCLUDE_CDS
2024 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2025 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2026 }
2027 #endif
2028
2029 // java_lang_Throwable
2030
2031 int java_lang_Throwable::_backtrace_offset;
2032 int java_lang_Throwable::_detailMessage_offset;
2033 int java_lang_Throwable::_stackTrace_offset;
2034 int java_lang_Throwable::_depth_offset;
2035 int java_lang_Throwable::_cause_offset;
2036 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2037
2038 #define THROWABLE_FIELDS_DO(macro) \
2039 macro(_backtrace_offset, k, "backtrace", object_signature, false); \
2040 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \
2041 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2042 macro(_depth_offset, k, "depth", int_signature, false); \
2043 macro(_cause_offset, k, "cause", throwable_signature, false); \
2044 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2045
2046 void java_lang_Throwable::compute_offsets() {
2047 InstanceKlass* k = vmClasses::Throwable_klass();
2048 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2049 }
2050
2051 #if INCLUDE_CDS
2052 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2053 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2054 }
2055 #endif
2056
2057 oop java_lang_Throwable::unassigned_stacktrace() {
2058 InstanceKlass* ik = vmClasses::Throwable_klass();
2059 oop base = ik->static_field_base_raw();
2060 return base->obj_field(_static_unassigned_stacktrace_offset);
2061 }
2062
2063 oop java_lang_Throwable::backtrace(oop throwable) {
2064 return throwable->obj_field_acquire(_backtrace_offset);
2065 }
2066
2067
2068 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2069 throwable->release_obj_field_put(_backtrace_offset, value);
2070 }
2071
2072 int java_lang_Throwable::depth(oop throwable) {
2073 return throwable->int_field(_depth_offset);
2074 }
2075
2076 void java_lang_Throwable::set_depth(oop throwable, int value) {
2077 throwable->int_field_put(_depth_offset, value);
2078 }
2079
2080 oop java_lang_Throwable::message(oop throwable) {
2081 return throwable->obj_field(_detailMessage_offset);
2082 }
2083
2084 const char* java_lang_Throwable::message_as_utf8(oop throwable) {
2085 oop msg = java_lang_Throwable::message(throwable);
2086 const char* msg_utf8 = nullptr;
2087 if (msg != nullptr) {
2088 msg_utf8 = java_lang_String::as_utf8_string(msg);
2089 }
2090 return msg_utf8;
2091 }
2092
2093 oop java_lang_Throwable::cause(oop throwable) {
2094 return throwable->obj_field(_cause_offset);
2095 }
2096
2097 void java_lang_Throwable::set_message(oop throwable, oop value) {
2098 throwable->obj_field_put(_detailMessage_offset, value);
2099 }
2100
2101
2102 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2103 throwable->obj_field_put(_stackTrace_offset, st_element_array);
2104 }
2105
2106 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2107 set_stacktrace(throwable, nullptr);
2108 }
2109
2110
2111 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2112 ResourceMark rm;
2113 Klass* k = throwable->klass();
2114 assert(k != nullptr, "just checking");
2115 st->print("%s", k->external_name());
2116 oop msg = message(throwable);
2117 if (msg != nullptr) {
2118 st->print(": %s", java_lang_String::as_utf8_string(msg));
2119 }
2120 }
2121
2122 // After this many redefines, the stack trace is unreliable.
2123 const int MAX_VERSION = USHRT_MAX;
2124
2125 static inline bool version_matches(Method* method, int version) {
2126 assert(version < MAX_VERSION, "version is too big");
2127 return method != nullptr && (method->constants()->version() == version);
2128 }
2129
2130 // This class provides a simple wrapper over the internal structure of
2131 // exception backtrace to insulate users of the backtrace from needing
2132 // to know what it looks like.
2133 // The code of this class is not GC safe. Allocations can only happen
2134 // in expand().
2135 class BacktraceBuilder: public StackObj {
2136 friend class BacktraceIterator;
2137 private:
2138 Handle _backtrace;
2139 objArrayOop _head;
2140 typeArrayOop _methods;
2141 typeArrayOop _bcis;
2142 objArrayOop _mirrors;
2143 typeArrayOop _names; // Needed to insulate method name against redefinition.
2144 // True if the top frame of the backtrace is omitted because it shall be hidden.
2145 bool _has_hidden_top_frame;
2146 int _index;
2147 NoSafepointVerifier _nsv;
2148
2149 enum {
2150 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2151 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2152 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2153 trace_names_offset = java_lang_Throwable::trace_names_offset,
2154 trace_conts_offset = java_lang_Throwable::trace_conts_offset,
2155 trace_next_offset = java_lang_Throwable::trace_next_offset,
2156 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2157 trace_size = java_lang_Throwable::trace_size,
2158 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2159 };
2160
2161 // get info out of chunks
2162 static typeArrayOop get_methods(objArrayHandle chunk) {
2163 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2164 assert(methods != nullptr, "method array should be initialized in backtrace");
2165 return methods;
2166 }
2167 static typeArrayOop get_bcis(objArrayHandle chunk) {
2168 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2169 assert(bcis != nullptr, "bci array should be initialized in backtrace");
2170 return bcis;
2171 }
2172 static objArrayOop get_mirrors(objArrayHandle chunk) {
2173 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2174 assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2175 return mirrors;
2176 }
2177 static typeArrayOop get_names(objArrayHandle chunk) {
2178 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2179 assert(names != nullptr, "names array should be initialized in backtrace");
2180 return names;
2181 }
2182 static bool has_hidden_top_frame(objArrayHandle chunk) {
2183 oop hidden = chunk->obj_at(trace_hidden_offset);
2184 return hidden != nullptr;
2185 }
2186
2187 public:
2188
2189 // constructor for new backtrace
2190 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2191 expand(CHECK);
2192 _backtrace = Handle(THREAD, _head);
2193 _index = 0;
2194 }
2195
2196 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2197 _methods = get_methods(backtrace);
2198 _bcis = get_bcis(backtrace);
2199 _mirrors = get_mirrors(backtrace);
2200 _names = get_names(backtrace);
2201 _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2202 assert(_methods->length() == _bcis->length() &&
2203 _methods->length() == _mirrors->length() &&
2204 _mirrors->length() == _names->length(),
2205 "method and source information arrays should match");
2206
2207 // head is the preallocated backtrace
2208 _head = backtrace();
2209 _backtrace = Handle(thread, _head);
2210 _index = 0;
2211 }
2212
2213 void expand(TRAPS) {
2214 objArrayHandle old_head(THREAD, _head);
2215 PauseNoSafepointVerifier pnsv(&_nsv);
2216
2217 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2218 objArrayHandle new_head(THREAD, head);
2219
2220 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2221 typeArrayHandle new_methods(THREAD, methods);
2222
2223 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2224 typeArrayHandle new_bcis(THREAD, bcis);
2225
2226 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2227 objArrayHandle new_mirrors(THREAD, mirrors);
2228
2229 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2230 typeArrayHandle new_names(THREAD, names);
2231
2232 if (!old_head.is_null()) {
2233 old_head->obj_at_put(trace_next_offset, new_head());
2234 }
2235 new_head->obj_at_put(trace_methods_offset, new_methods());
2236 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2237 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2238 new_head->obj_at_put(trace_names_offset, new_names());
2239 new_head->obj_at_put(trace_hidden_offset, nullptr);
2240
2241 _head = new_head();
2242 _methods = new_methods();
2243 _bcis = new_bcis();
2244 _mirrors = new_mirrors();
2245 _names = new_names();
2246 _index = 0;
2247 }
2248
2249 oop backtrace() {
2250 return _backtrace();
2251 }
2252
2253 inline void push(Method* method, int bci, TRAPS) {
2254 // Smear the -1 bci to 0 since the array only holds unsigned
2255 // shorts. The later line number lookup would just smear the -1
2256 // to a 0 even if it could be recorded.
2257 if (bci == SynchronizationEntryBCI) bci = 0;
2258
2259 if (_index >= trace_chunk_size) {
2260 methodHandle mhandle(THREAD, method);
2261 expand(CHECK);
2262 method = mhandle();
2263 }
2264
2265 _methods->ushort_at_put(_index, method->orig_method_idnum());
2266 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2267
2268 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2269 // klass owning the symbols alive so their refcounts aren't decremented.
2270 Symbol* name = method->name();
2271 _names->symbol_at_put(_index, name);
2272
2273 // We need to save the mirrors in the backtrace to keep the class
2274 // from being unloaded while we still have this stack trace.
2275 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2276 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2277
2278 _index++;
2279 }
2280
2281 void set_has_hidden_top_frame() {
2282 if (!_has_hidden_top_frame) {
2283 // It would be nice to add java/lang/Boolean::TRUE here
2284 // to indicate that this backtrace has a hidden top frame.
2285 // But this code is used before TRUE is allocated.
2286 // Therefore let's just use an arbitrary legal oop
2287 // available right here. _methods is a short[].
2288 assert(_methods != nullptr, "we need a legal oop");
2289 _has_hidden_top_frame = true;
2290 _head->obj_at_put(trace_hidden_offset, _methods);
2291 }
2292 }
2293 };
2294
2295 struct BacktraceElement : public StackObj {
2296 int _method_id;
2297 int _bci;
2298 int _version;
2299 Symbol* _name;
2300 Handle _mirror;
2301 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2302 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2303 };
2304
2305 class BacktraceIterator : public StackObj {
2306 int _index;
2307 objArrayHandle _result;
2308 objArrayHandle _mirrors;
2309 typeArrayHandle _methods;
2310 typeArrayHandle _bcis;
2311 typeArrayHandle _names;
2312
2313 void init(objArrayHandle result, Thread* thread) {
2314 // Get method id, bci, version and mirror from chunk
2315 _result = result;
2316 if (_result.not_null()) {
2317 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2318 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2319 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2320 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2321 _index = 0;
2322 }
2323 }
2324 public:
2325 BacktraceIterator(objArrayHandle result, Thread* thread) {
2326 init(result, thread);
2327 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2328 }
2329
2330 BacktraceElement next(Thread* thread) {
2331 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2332 _methods->ushort_at(_index),
2333 Backtrace::version_at(_bcis->int_at(_index)),
2334 Backtrace::bci_at(_bcis->int_at(_index)),
2335 _names->symbol_at(_index));
2336 _index++;
2337
2338 if (_index >= java_lang_Throwable::trace_chunk_size) {
2339 int next_offset = java_lang_Throwable::trace_next_offset;
2340 // Get next chunk
2341 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2342 init(result, thread);
2343 }
2344 return e;
2345 }
2346
2347 bool repeat() {
2348 return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2349 }
2350 };
2351
2352
2353 // Print stack trace element to resource allocated buffer
2354 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2355 int version, int bci, Symbol* name) {
2356 ResourceMark rm;
2357
2358 // Get strings and string lengths
2359 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2360 const char* klass_name = holder->external_name();
2361 int buf_len = (int)strlen(klass_name);
2362
2363 char* method_name = name->as_C_string();
2364 buf_len += (int)strlen(method_name);
2365
2366 char* source_file_name = nullptr;
2367 Symbol* source = Backtrace::get_source_file_name(holder, version);
2368 if (source != nullptr) {
2369 source_file_name = source->as_C_string();
2370 buf_len += (int)strlen(source_file_name);
2371 }
2372
2373 char *module_name = nullptr, *module_version = nullptr;
2374 ModuleEntry* module = holder->module();
2375 if (module->is_named()) {
2376 module_name = module->name()->as_C_string();
2377 buf_len += (int)strlen(module_name);
2378 if (module->version() != nullptr) {
2379 module_version = module->version()->as_C_string();
2380 buf_len += (int)strlen(module_version);
2381 }
2382 }
2383
2384 // Allocate temporary buffer with extra space for formatting and line number
2385 const size_t buf_size = buf_len + 64;
2386 char* buf = NEW_RESOURCE_ARRAY(char, buf_size);
2387
2388 // Print stack trace line in buffer
2389 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name);
2390
2391 // Print module information
2392 if (module_name != nullptr) {
2393 if (module_version != nullptr) {
2394 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version);
2395 } else {
2396 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name);
2397 }
2398 }
2399
2400 // The method can be null if the requested class version is gone
2401 Method* method = holder->method_with_orig_idnum(method_id, version);
2402 if (!version_matches(method, version)) {
2403 strcat(buf, "Redefined)");
2404 } else {
2405 int line_number = Backtrace::get_line_number(method, bci);
2406 if (line_number == -2) {
2407 strcat(buf, "Native Method)");
2408 } else {
2409 if (source_file_name != nullptr && (line_number != -1)) {
2410 // Sourcename and linenumber
2411 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number);
2412 } else if (source_file_name != nullptr) {
2413 // Just sourcename
2414 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name);
2415 } else {
2416 // Neither sourcename nor linenumber
2417 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)");
2418 }
2419 nmethod* nm = method->code();
2420 if (WizardMode && nm != nullptr) {
2421 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2422 }
2423 }
2424 }
2425
2426 st->print_cr("%s", buf);
2427 }
2428
2429 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2430 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2431 int method_id = method->orig_method_idnum();
2432 int version = method->constants()->version();
2433 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2434 }
2435
2436 /**
2437 * Print the throwable message and its stack trace plus all causes by walking the
2438 * cause chain. The output looks the same as of Throwable.printStackTrace().
2439 */
2440 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2441 // First, print the message.
2442 print(throwable(), st);
2443 st->cr();
2444
2445 // Now print the stack trace.
2446 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2447 while (throwable.not_null()) {
2448 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2449 if (result.is_null()) {
2450 st->print_raw_cr("\t<<no stack trace available>>");
2451 return;
2452 }
2453 BacktraceIterator iter(result, THREAD);
2454
2455 while (iter.repeat()) {
2456 BacktraceElement bte = iter.next(THREAD);
2457 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2458 }
2459 if (THREAD->can_call_java()) {
2460 // Call getCause() which doesn't necessarily return the _cause field.
2461 ExceptionMark em(THREAD);
2462 JavaValue cause(T_OBJECT);
2463 JavaCalls::call_virtual(&cause,
2464 throwable,
2465 throwable->klass(),
2466 vmSymbols::getCause_name(),
2467 vmSymbols::void_throwable_signature(),
2468 THREAD);
2469 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2470 if (HAS_PENDING_EXCEPTION) {
2471 CLEAR_PENDING_EXCEPTION;
2472 throwable = Handle();
2473 } else {
2474 throwable = Handle(THREAD, cause.get_oop());
2475 if (throwable.not_null()) {
2476 st->print("Caused by: ");
2477 print(throwable(), st);
2478 st->cr();
2479 }
2480 }
2481 } else {
2482 st->print_raw_cr("<<cannot call Java to get cause>>");
2483 return;
2484 }
2485 }
2486 }
2487
2488 /**
2489 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2490 */
2491 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2492 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2493 JavaValue result(T_VOID);
2494 JavaCalls::call_virtual(&result,
2495 throwable,
2496 vmClasses::Throwable_klass(),
2497 vmSymbols::printStackTrace_name(),
2498 vmSymbols::void_method_signature(),
2499 THREAD);
2500 }
2501
2502 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2503 if (!StackTraceInThrowable) return;
2504 ResourceMark rm(THREAD);
2505
2506 // Start out by clearing the backtrace for this object, in case the VM
2507 // runs out of memory while allocating the stack trace
2508 set_backtrace(throwable(), nullptr);
2509 // Clear lazily constructed Java level stacktrace if refilling occurs
2510 // This is unnecessary in 1.7+ but harmless
2511 clear_stacktrace(throwable());
2512
2513 int max_depth = MaxJavaStackTraceDepth;
2514 JavaThread* thread = THREAD;
2515
2516 BacktraceBuilder bt(CHECK);
2517
2518 // If there is no Java frame just return the method that was being called
2519 // with bci 0
2520 if (!thread->has_last_Java_frame()) {
2521 if (max_depth >= 1 && method() != nullptr) {
2522 bt.push(method(), 0, CHECK);
2523 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2524 set_depth(throwable(), 1);
2525 set_backtrace(throwable(), bt.backtrace());
2526 }
2527 return;
2528 }
2529
2530 // Instead of using vframe directly, this version of fill_in_stack_trace
2531 // basically handles everything by hand. This significantly improved the
2532 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2533 // See bug 6333838 for more details.
2534 // The "ASSERT" here is to verify this method generates the exactly same stack
2535 // trace as utilizing vframe.
2536 #ifdef ASSERT
2537 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2538 #endif
2539 int total_count = 0;
2540 RegisterMap map(thread,
2541 RegisterMap::UpdateMap::skip,
2542 RegisterMap::ProcessFrames::skip,
2543 RegisterMap::WalkContinuation::include);
2544 int decode_offset = 0;
2545 nmethod* nm = nullptr;
2546 bool skip_fillInStackTrace_check = false;
2547 bool skip_throwableInit_check = false;
2548 bool skip_hidden = !ShowHiddenFrames;
2549 bool show_carrier = ShowCarrierFrames;
2550 ContinuationEntry* cont_entry = thread->last_continuation();
2551 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2552 Method* method = nullptr;
2553 int bci = 0;
2554
2555 // Compiled java method case.
2556 if (decode_offset != 0) {
2557 DebugInfoReadStream stream(nm, decode_offset);
2558 decode_offset = stream.read_int();
2559 method = (Method*)nm->metadata_at(stream.read_int());
2560 bci = stream.read_bci();
2561 } else {
2562 if (fr.is_first_frame()) break;
2563
2564 if (Continuation::is_continuation_enterSpecial(fr)) {
2565 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2566 if (!show_carrier && cont_entry->is_virtual_thread()) {
2567 break;
2568 }
2569 cont_entry = cont_entry->parent();
2570 }
2571
2572 address pc = fr.pc();
2573 if (fr.is_interpreted_frame()) {
2574 address bcp;
2575 if (!map.in_cont()) {
2576 bcp = fr.interpreter_frame_bcp();
2577 method = fr.interpreter_frame_method();
2578 } else {
2579 bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2580 method = map.stack_chunk()->interpreter_frame_method(fr);
2581 }
2582 bci = method->bci_from(bcp);
2583 fr = fr.sender(&map);
2584 } else {
2585 CodeBlob* cb = fr.cb();
2586 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2587 // but non nmethod
2588 fr = fr.sender(&map);
2589 if (cb == nullptr || !cb->is_nmethod()) {
2590 continue;
2591 }
2592 nm = cb->as_nmethod();
2593 assert(nm->method() != nullptr, "must be");
2594 if (nm->method()->is_native()) {
2595 method = nm->method();
2596 bci = 0;
2597 } else {
2598 PcDesc* pd = nm->pc_desc_at(pc);
2599 decode_offset = pd->scope_decode_offset();
2600 // if decode_offset is not equal to 0, it will execute the
2601 // "compiled java method case" at the beginning of the loop.
2602 continue;
2603 }
2604 }
2605 }
2606 #ifdef ASSERT
2607 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2608 assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2609 st.next();
2610 }
2611 #endif
2612
2613 // the format of the stacktrace will be:
2614 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2615 // - 0 or more <init> methods for the exception class (skipped)
2616 // - rest of the stack
2617
2618 if (!skip_fillInStackTrace_check) {
2619 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2620 throwable->is_a(method->method_holder())) {
2621 continue;
2622 }
2623 else {
2624 skip_fillInStackTrace_check = true; // gone past them all
2625 }
2626 }
2627 if (!skip_throwableInit_check) {
2628 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2629
2630 // skip <init> methods of the exception class and superclasses
2631 // This is similar to classic VM.
2632 if (method->name() == vmSymbols::object_initializer_name() &&
2633 throwable->is_a(method->method_holder())) {
2634 continue;
2635 } else {
2636 // there are none or we've seen them all - either way stop checking
2637 skip_throwableInit_check = true;
2638 }
2639 }
2640 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2641 if (skip_hidden) {
2642 if (total_count == 0) {
2643 // The top frame will be hidden from the stack trace.
2644 bt.set_has_hidden_top_frame();
2645 }
2646 continue;
2647 }
2648 }
2649
2650 bt.push(method, bci, CHECK);
2651 total_count++;
2652 }
2653
2654 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2655
2656 // Put completed stack trace into throwable object
2657 set_backtrace(throwable(), bt.backtrace());
2658 set_depth(throwable(), total_count);
2659 }
2660
2661 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2662 // No-op if stack trace is disabled
2663 if (!StackTraceInThrowable) {
2664 return;
2665 }
2666
2667 // Disable stack traces for some preallocated out of memory errors
2668 if (!Universe::should_fill_in_stack_trace(throwable)) {
2669 return;
2670 }
2671
2672 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2673 PreserveExceptionMark pm(THREAD);
2674
2675 fill_in_stack_trace(throwable, method, THREAD);
2676 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2677 // original exception via the PreserveExceptionMark destructor.
2678 CLEAR_PENDING_EXCEPTION;
2679 }
2680
2681 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2682 // Allocate stack trace - backtrace is created but not filled in
2683
2684 // No-op if stack trace is disabled
2685 if (!StackTraceInThrowable) return;
2686 BacktraceBuilder bt(CHECK); // creates a backtrace
2687 set_backtrace(throwable(), bt.backtrace());
2688 }
2689
2690
2691 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2692 // Fill in stack trace into preallocated backtrace (no GC)
2693
2694 // No-op if stack trace is disabled
2695 if (!StackTraceInThrowable) return;
2696
2697 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2698
2699 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2700
2701 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2702 assert(backtrace.not_null(), "backtrace should have been preallocated");
2703
2704 ResourceMark rm(THREAD);
2705 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2706
2707 BacktraceBuilder bt(THREAD, backtrace);
2708
2709 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2710 // methods as preallocated errors aren't created by "java" code.
2711
2712 // fill in as much stack trace as possible
2713 int chunk_count = 0;
2714 for (;!st.at_end(); st.next()) {
2715 bt.push(st.method(), st.bci(), CHECK);
2716 chunk_count++;
2717
2718 // Bail-out for deep stacks
2719 if (chunk_count >= trace_chunk_size) break;
2720 }
2721 set_depth(throwable(), chunk_count);
2722 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2723
2724 // We support the Throwable immutability protocol defined for Java 7.
2725 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2726 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2727 }
2728
2729 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2730 objArrayHandle stack_trace_array_h, TRAPS) {
2731
2732 if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2733 THROW(vmSymbols::java_lang_NullPointerException());
2734 }
2735
2736 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2737
2738 if (stack_trace_array_h->length() != depth) {
2739 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2740 }
2741
2742 objArrayHandle result(THREAD, objArrayOop(backtrace()));
2743 BacktraceIterator iter(result, THREAD);
2744
2745 int index = 0;
2746 while (iter.repeat()) {
2747 BacktraceElement bte = iter.next(THREAD);
2748
2749 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2750
2751 if (stack_trace_element.is_null()) {
2752 THROW(vmSymbols::java_lang_NullPointerException());
2753 }
2754
2755 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2756 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2757
2758 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2759 method,
2760 bte._version,
2761 bte._bci,
2762 bte._name,
2763 CHECK);
2764 }
2765 }
2766
2767 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
2768 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
2769 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
2770 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
2771 // symbolic stacktrace of 'throwable'.
2772 assert(throwable.not_null(), "shouldn't be");
2773
2774 // Now create the message from the original exception and thread name.
2775 ResourceMark rm(current);
2776 const char *message = nullptr;
2777 oop detailed_message = java_lang_Throwable::message(throwable());
2778 if (detailed_message != nullptr) {
2779 message = java_lang_String::as_utf8_string(detailed_message);
2780 }
2781 stringStream st;
2782 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
2783 message == nullptr ? "" : ":");
2784 if (message == nullptr) {
2785 st.print("[in thread \"%s\"]", current->name());
2786 } else {
2787 st.print("%s [in thread \"%s\"]", message, current->name());
2788 }
2789
2790 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
2791 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
2792 // If new_exception returns a different exception while creating the exception,
2793 // abandon the attempt to save the initialization error and return null.
2794 if (init_error->klass()->name() != exception_name) {
2795 log_info(class, init)("Exception %s thrown while saving initialization exception",
2796 init_error->klass()->external_name());
2797 return Handle();
2798 }
2799
2800 // Call to java to fill in the stack trace and clear declaringClassObject to
2801 // not keep classes alive in the stack trace.
2802 // call this: public StackTraceElement[] getStackTrace()
2803 JavaValue result(T_ARRAY);
2804 JavaCalls::call_virtual(&result, throwable,
2805 vmClasses::Throwable_klass(),
2806 vmSymbols::getStackTrace_name(),
2807 vmSymbols::getStackTrace_signature(),
2808 current);
2809 if (!current->has_pending_exception()){
2810 Handle stack_trace(current, result.get_oop());
2811 assert(stack_trace->is_objArray(), "Should be an array");
2812 java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
2813 // Clear backtrace because the stacktrace should be used instead.
2814 set_backtrace(init_error(), nullptr);
2815 } else {
2816 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
2817 init_error->klass()->external_name());
2818 current->clear_pending_exception();
2819 }
2820
2821 return init_error;
2822 }
2823
2824 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
2825 JavaThread* current = JavaThread::current();
2826 objArrayHandle result(current, objArrayOop(backtrace(throwable)));
2827 BacktraceIterator iter(result, current);
2828 // No backtrace available.
2829 if (!iter.repeat()) return false;
2830
2831 // If the exception happened in a frame that has been hidden, i.e.,
2832 // omitted from the back trace, we can not compute the message.
2833 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
2834 if (hidden != nullptr) {
2835 return false;
2836 }
2837
2838 // Get first backtrace element.
2839 BacktraceElement bte = iter.next(current);
2840
2841 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2842 assert(holder != nullptr, "first element should be non-null");
2843 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
2844
2845 // Original version is no longer available.
2846 if (m == nullptr || !version_matches(m, bte._version)) {
2847 return false;
2848 }
2849
2850 *method = m;
2851 *bci = bte._bci;
2852 return true;
2853 }
2854
2855 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2856 // Allocate java.lang.StackTraceElement instance
2857 InstanceKlass* k = vmClasses::StackTraceElement_klass();
2858 assert(k != nullptr, "must be loaded in 1.4+");
2859 if (k->should_be_initialized()) {
2860 k->initialize(CHECK_NULL);
2861 }
2862
2863 Handle element = k->allocate_instance_handle(CHECK_NULL);
2864
2865 int version = method->constants()->version();
2866 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
2867 return element();
2868 }
2869
2870 void java_lang_StackTraceElement::fill_in(Handle element,
2871 InstanceKlass* holder, const methodHandle& method,
2872 int version, int bci, Symbol* name, TRAPS) {
2873 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
2874
2875 ResourceMark rm(THREAD);
2876 HandleMark hm(THREAD);
2877
2878 // Fill in class name
2879 Handle java_class(THREAD, holder->java_mirror());
2880 oop classname = java_lang_Class::name(java_class, CHECK);
2881 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2882 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2883
2884 oop loader = holder->class_loader();
2885 if (loader != nullptr) {
2886 oop loader_name = java_lang_ClassLoader::name(loader);
2887 if (loader_name != nullptr)
2888 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2889 }
2890
2891 // Fill in method name
2892 oop methodname = StringTable::intern(name, CHECK);
2893 java_lang_StackTraceElement::set_methodName(element(), methodname);
2894
2895 // Fill in module name and version
2896 ModuleEntry* module = holder->module();
2897 if (module->is_named()) {
2898 oop module_name = StringTable::intern(module->name(), CHECK);
2899 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2900 oop module_version;
2901 if (module->version() != nullptr) {
2902 module_version = StringTable::intern(module->version(), CHECK);
2903 } else {
2904 module_version = nullptr;
2905 }
2906 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2907 }
2908
2909 if (method() == nullptr || !version_matches(method(), version)) {
2910 // The method was redefined, accurate line number information isn't available
2911 java_lang_StackTraceElement::set_fileName(element(), nullptr);
2912 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2913 } else {
2914 Symbol* source;
2915 oop source_file;
2916 int line_number;
2917 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
2918
2919 java_lang_StackTraceElement::set_fileName(element(), source_file);
2920 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2921 }
2922 }
2923
2924 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
2925 InstanceKlass* holder,
2926 int version,
2927 const methodHandle& method,
2928 int bci,
2929 Symbol*& source,
2930 oop& source_file,
2931 int& line_number, TRAPS) {
2932 // Fill in source file name and line number.
2933 source = Backtrace::get_source_file_name(holder, version);
2934 source_file = java_lang_Class::source_file(java_class());
2935 if (source != nullptr) {
2936 // Class was not redefined. We can trust its cache if set,
2937 // else we have to initialize it.
2938 if (source_file == nullptr) {
2939 source_file = StringTable::intern(source, CHECK);
2940 java_lang_Class::set_source_file(java_class(), source_file);
2941 }
2942 } else {
2943 // Class was redefined. Dump the cache if it was set.
2944 if (source_file != nullptr) {
2945 source_file = nullptr;
2946 java_lang_Class::set_source_file(java_class(), source_file);
2947 }
2948 }
2949 line_number = Backtrace::get_line_number(method(), bci);
2950 }
2951
2952 #if INCLUDE_JVMCI
2953 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
2954 Symbol*& filename, int& line_number, TRAPS) {
2955 ResourceMark rm(THREAD);
2956 HandleMark hm(THREAD);
2957
2958 filename = nullptr;
2959 line_number = -1;
2960
2961 oop source_file;
2962 int version = method->constants()->version();
2963 InstanceKlass* holder = method->method_holder();
2964 Handle java_class(THREAD, holder->java_mirror());
2965 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
2966 }
2967 #endif // INCLUDE_JVMCI
2968
2969 // java_lang_ClassFrameInfo
2970
2971 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
2972 int java_lang_ClassFrameInfo::_flags_offset;
2973
2974 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
2975 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \
2976 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false)
2977
2978 void java_lang_ClassFrameInfo::compute_offsets() {
2979 InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
2980 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2981 }
2982
2983 #if INCLUDE_CDS
2984 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
2985 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2986 }
2987 #endif
2988
2989 static int get_flags(const methodHandle& m) {
2990 int flags = (jushort)( m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS );
2991 if (m->is_initializer()) {
2992 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR;
2993 } else {
2994 flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
2995 }
2996 if (m->caller_sensitive()) {
2997 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
2998 }
2999 if (m->is_hidden()) {
3000 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3001 }
3002 assert((flags & 0xFF000000) == 0, "unexpected flags");
3003 return flags;
3004 }
3005
3006 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3007 return obj->obj_field(_classOrMemberName_offset);
3008 }
3009
3010 int java_lang_ClassFrameInfo::flags(oop obj) {
3011 return obj->int_field(_flags_offset);
3012 }
3013
3014 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3015 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3016 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3017 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3018 stackFrame->int_field_put(_flags_offset, flags);
3019 }
3020
3021 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3022 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3023 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3024 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3025 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3026 stackFrame->int_field_put(_flags_offset, flags);
3027 }
3028
3029
3030 // java_lang_StackFrameInfo
3031
3032 int java_lang_StackFrameInfo::_type_offset;
3033 int java_lang_StackFrameInfo::_name_offset;
3034 int java_lang_StackFrameInfo::_bci_offset;
3035 int java_lang_StackFrameInfo::_version_offset;
3036 int java_lang_StackFrameInfo::_contScope_offset;
3037
3038 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3039 macro(_type_offset, k, "type", object_signature, false); \
3040 macro(_name_offset, k, "name", string_signature, false); \
3041 macro(_bci_offset, k, "bci", int_signature, false); \
3042 macro(_contScope_offset, k, "contScope", continuationscope_signature, false)
3043
3044 void java_lang_StackFrameInfo::compute_offsets() {
3045 InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3046 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3047 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3048 }
3049
3050 #if INCLUDE_CDS
3051 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3052 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3053 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3054 }
3055 #endif
3056
3057 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3058 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3059 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3060 return method;
3061 }
3062
3063 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3064 // set Method* or mid/cpref
3065 HandleMark hm(THREAD);
3066 Handle cont_h(THREAD, cont);
3067 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3068
3069 // set bci
3070 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3071 // method may be redefined; store the version
3072 int version = method->constants()->version();
3073 assert((jushort)version == version, "version should be short");
3074 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3075
3076 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3077 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3078 }
3079
3080 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3081 ResourceMark rm(THREAD);
3082 HandleMark hm(THREAD);
3083
3084 Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3085 InstanceKlass* holder = method->method_holder();
3086 short version = stackFrame->short_field(_version_offset);
3087 int bci = stackFrame->int_field(_bci_offset);
3088 Symbol* name = method->name();
3089 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3090 }
3091
3092 oop java_lang_StackFrameInfo::type(oop obj) {
3093 return obj->obj_field(_type_offset);
3094 }
3095
3096 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3097 obj->obj_field_put(_type_offset, value);
3098 }
3099
3100 oop java_lang_StackFrameInfo::name(oop obj) {
3101 return obj->obj_field(_name_offset);
3102 }
3103
3104 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3105 obj->obj_field_put(_name_offset, value);
3106 }
3107
3108 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3109 obj->short_field_put(_version_offset, value);
3110 }
3111
3112 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3113 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3114 obj->int_field_put(_bci_offset, value);
3115 }
3116
3117 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3118 obj->obj_field_put(_contScope_offset, value);
3119 }
3120
3121 int java_lang_LiveStackFrameInfo::_monitors_offset;
3122 int java_lang_LiveStackFrameInfo::_locals_offset;
3123 int java_lang_LiveStackFrameInfo::_operands_offset;
3124 int java_lang_LiveStackFrameInfo::_mode_offset;
3125
3126 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3127 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
3128 macro(_locals_offset, k, "locals", object_array_signature, false); \
3129 macro(_operands_offset, k, "operands", object_array_signature, false); \
3130 macro(_mode_offset, k, "mode", int_signature, false)
3131
3132 void java_lang_LiveStackFrameInfo::compute_offsets() {
3133 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3134 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3135 }
3136
3137 #if INCLUDE_CDS
3138 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3139 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3140 }
3141 #endif
3142
3143 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3144 obj->obj_field_put(_monitors_offset, value);
3145 }
3146
3147 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3148 obj->obj_field_put(_locals_offset, value);
3149 }
3150
3151 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3152 obj->obj_field_put(_operands_offset, value);
3153 }
3154
3155 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3156 obj->int_field_put(_mode_offset, value);
3157 }
3158
3159
3160 // java_lang_AccessibleObject
3161
3162 int java_lang_reflect_AccessibleObject::_override_offset;
3163
3164 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3165 macro(_override_offset, k, "override", bool_signature, false)
3166
3167 void java_lang_reflect_AccessibleObject::compute_offsets() {
3168 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3169 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3170 }
3171
3172 #if INCLUDE_CDS
3173 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3174 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3175 }
3176 #endif
3177
3178 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3179 return (jboolean) reflect->bool_field(_override_offset);
3180 }
3181
3182 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3183 reflect->bool_field_put(_override_offset, (int) value);
3184 }
3185
3186 // java_lang_reflect_Method
3187
3188 int java_lang_reflect_Method::_clazz_offset;
3189 int java_lang_reflect_Method::_name_offset;
3190 int java_lang_reflect_Method::_returnType_offset;
3191 int java_lang_reflect_Method::_parameterTypes_offset;
3192 int java_lang_reflect_Method::_exceptionTypes_offset;
3193 int java_lang_reflect_Method::_slot_offset;
3194 int java_lang_reflect_Method::_modifiers_offset;
3195 int java_lang_reflect_Method::_signature_offset;
3196 int java_lang_reflect_Method::_annotations_offset;
3197 int java_lang_reflect_Method::_parameter_annotations_offset;
3198 int java_lang_reflect_Method::_annotation_default_offset;
3199
3200 #define METHOD_FIELDS_DO(macro) \
3201 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3202 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3203 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
3204 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3205 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3206 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3207 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3208 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3209 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3210 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3211 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
3212
3213 void java_lang_reflect_Method::compute_offsets() {
3214 InstanceKlass* k = vmClasses::reflect_Method_klass();
3215 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3216 }
3217
3218 #if INCLUDE_CDS
3219 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3220 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3221 }
3222 #endif
3223
3224 Handle java_lang_reflect_Method::create(TRAPS) {
3225 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3226 Klass* klass = vmClasses::reflect_Method_klass();
3227 // This class is eagerly initialized during VM initialization, since we keep a reference
3228 // to one of the methods
3229 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
3230 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
3231 }
3232
3233 oop java_lang_reflect_Method::clazz(oop reflect) {
3234 return reflect->obj_field(_clazz_offset);
3235 }
3236
3237 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3238 reflect->obj_field_put(_clazz_offset, value);
3239 }
3240
3241 int java_lang_reflect_Method::slot(oop reflect) {
3242 return reflect->int_field(_slot_offset);
3243 }
3244
3245 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3246 reflect->int_field_put(_slot_offset, value);
3247 }
3248
3249 void java_lang_reflect_Method::set_name(oop method, oop value) {
3250 method->obj_field_put(_name_offset, value);
3251 }
3252
3253 oop java_lang_reflect_Method::return_type(oop method) {
3254 return method->obj_field(_returnType_offset);
3255 }
3256
3257 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3258 method->obj_field_put(_returnType_offset, value);
3259 }
3260
3261 oop java_lang_reflect_Method::parameter_types(oop method) {
3262 return method->obj_field(_parameterTypes_offset);
3263 }
3264
3265 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3266 method->obj_field_put(_parameterTypes_offset, value);
3267 }
3268
3269 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3270 method->obj_field_put(_exceptionTypes_offset, value);
3271 }
3272
3273 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3274 method->int_field_put(_modifiers_offset, value);
3275 }
3276
3277 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3278 method->obj_field_put(_signature_offset, value);
3279 }
3280
3281 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3282 method->obj_field_put(_annotations_offset, value);
3283 }
3284
3285 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3286 method->obj_field_put(_parameter_annotations_offset, value);
3287 }
3288
3289 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3290 method->obj_field_put(_annotation_default_offset, value);
3291 }
3292
3293 int java_lang_reflect_Constructor::_clazz_offset;
3294 int java_lang_reflect_Constructor::_parameterTypes_offset;
3295 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3296 int java_lang_reflect_Constructor::_slot_offset;
3297 int java_lang_reflect_Constructor::_modifiers_offset;
3298 int java_lang_reflect_Constructor::_signature_offset;
3299 int java_lang_reflect_Constructor::_annotations_offset;
3300 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3301
3302 #define CONSTRUCTOR_FIELDS_DO(macro) \
3303 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3304 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3305 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3306 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3307 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3308 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3309 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3310 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3311
3312 void java_lang_reflect_Constructor::compute_offsets() {
3313 InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3314 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3315 }
3316
3317 #if INCLUDE_CDS
3318 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3319 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3320 }
3321 #endif
3322
3323 Handle java_lang_reflect_Constructor::create(TRAPS) {
3324 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3325 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3326 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3327 InstanceKlass* ik = InstanceKlass::cast(k);
3328 // Ensure it is initialized
3329 ik->initialize(CHECK_NH);
3330 return ik->allocate_instance_handle(THREAD);
3331 }
3332
3333 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3334 return reflect->obj_field(_clazz_offset);
3335 }
3336
3337 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3338 reflect->obj_field_put(_clazz_offset, value);
3339 }
3340
3341 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3342 return constructor->obj_field(_parameterTypes_offset);
3343 }
3344
3345 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3346 constructor->obj_field_put(_parameterTypes_offset, value);
3347 }
3348
3349 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3350 constructor->obj_field_put(_exceptionTypes_offset, value);
3351 }
3352
3353 int java_lang_reflect_Constructor::slot(oop reflect) {
3354 return reflect->int_field(_slot_offset);
3355 }
3356
3357 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3358 reflect->int_field_put(_slot_offset, value);
3359 }
3360
3361 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3362 constructor->int_field_put(_modifiers_offset, value);
3363 }
3364
3365 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3366 constructor->obj_field_put(_signature_offset, value);
3367 }
3368
3369 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3370 constructor->obj_field_put(_annotations_offset, value);
3371 }
3372
3373 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3374 method->obj_field_put(_parameter_annotations_offset, value);
3375 }
3376
3377 int java_lang_reflect_Field::_clazz_offset;
3378 int java_lang_reflect_Field::_name_offset;
3379 int java_lang_reflect_Field::_type_offset;
3380 int java_lang_reflect_Field::_slot_offset;
3381 int java_lang_reflect_Field::_modifiers_offset;
3382 int java_lang_reflect_Field::_trusted_final_offset;
3383 int java_lang_reflect_Field::_signature_offset;
3384 int java_lang_reflect_Field::_annotations_offset;
3385
3386 #define FIELD_FIELDS_DO(macro) \
3387 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3388 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3389 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \
3390 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3391 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3392 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \
3393 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3394 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3395
3396 void java_lang_reflect_Field::compute_offsets() {
3397 InstanceKlass* k = vmClasses::reflect_Field_klass();
3398 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3399 }
3400
3401 #if INCLUDE_CDS
3402 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3403 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3404 }
3405 #endif
3406
3407 Handle java_lang_reflect_Field::create(TRAPS) {
3408 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3409 Symbol* name = vmSymbols::java_lang_reflect_Field();
3410 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3411 InstanceKlass* ik = InstanceKlass::cast(k);
3412 // Ensure it is initialized
3413 ik->initialize(CHECK_NH);
3414 return ik->allocate_instance_handle(THREAD);
3415 }
3416
3417 oop java_lang_reflect_Field::clazz(oop reflect) {
3418 return reflect->obj_field(_clazz_offset);
3419 }
3420
3421 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3422 reflect->obj_field_put(_clazz_offset, value);
3423 }
3424
3425 oop java_lang_reflect_Field::name(oop field) {
3426 return field->obj_field(_name_offset);
3427 }
3428
3429 void java_lang_reflect_Field::set_name(oop field, oop value) {
3430 field->obj_field_put(_name_offset, value);
3431 }
3432
3433 oop java_lang_reflect_Field::type(oop field) {
3434 return field->obj_field(_type_offset);
3435 }
3436
3437 void java_lang_reflect_Field::set_type(oop field, oop value) {
3438 field->obj_field_put(_type_offset, value);
3439 }
3440
3441 int java_lang_reflect_Field::slot(oop reflect) {
3442 return reflect->int_field(_slot_offset);
3443 }
3444
3445 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3446 reflect->int_field_put(_slot_offset, value);
3447 }
3448
3449 int java_lang_reflect_Field::modifiers(oop field) {
3450 return field->int_field(_modifiers_offset);
3451 }
3452
3453 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3454 field->int_field_put(_modifiers_offset, value);
3455 }
3456
3457 void java_lang_reflect_Field::set_trusted_final(oop field) {
3458 field->bool_field_put(_trusted_final_offset, true);
3459 }
3460
3461 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3462 field->obj_field_put(_signature_offset, value);
3463 }
3464
3465 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3466 field->obj_field_put(_annotations_offset, value);
3467 }
3468
3469 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3470 // Allocate java.lang.reflect.RecordComponent instance
3471 HandleMark hm(THREAD);
3472 InstanceKlass* ik = vmClasses::RecordComponent_klass();
3473 assert(ik != nullptr, "must be loaded");
3474 ik->initialize(CHECK_NULL);
3475
3476 Handle element = ik->allocate_instance_handle(CHECK_NULL);
3477
3478 Handle decl_class(THREAD, holder->java_mirror());
3479 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3480
3481 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3482 oop component_name = StringTable::intern(name, CHECK_NULL);
3483 java_lang_reflect_RecordComponent::set_name(element(), component_name);
3484
3485 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3486 Handle component_type_h =
3487 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3488 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3489
3490 Method* accessor_method = nullptr;
3491 {
3492 // Prepend "()" to type to create the full method signature.
3493 ResourceMark rm(THREAD);
3494 int sig_len = type->utf8_length() + 3; // "()" and null char
3495 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3496 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3497 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3498 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3499 }
3500
3501 if (accessor_method != nullptr) {
3502 methodHandle method(THREAD, accessor_method);
3503 oop m = Reflection::new_method(method, false, CHECK_NULL);
3504 java_lang_reflect_RecordComponent::set_accessor(element(), m);
3505 } else {
3506 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3507 }
3508
3509 int sig_index = component->generic_signature_index();
3510 if (sig_index > 0) {
3511 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3512 oop component_sig = StringTable::intern(sig, CHECK_NULL);
3513 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3514 } else {
3515 java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3516 }
3517
3518 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3519 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3520
3521 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3522 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3523
3524 return element();
3525 }
3526
3527 int reflect_ConstantPool::_oop_offset;
3528
3529 #define CONSTANTPOOL_FIELDS_DO(macro) \
3530 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3531
3532 void reflect_ConstantPool::compute_offsets() {
3533 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3534 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3535 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3536 }
3537
3538 #if INCLUDE_CDS
3539 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3540 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3541 }
3542 #endif
3543
3544 int java_lang_reflect_Parameter::_name_offset;
3545 int java_lang_reflect_Parameter::_modifiers_offset;
3546 int java_lang_reflect_Parameter::_index_offset;
3547 int java_lang_reflect_Parameter::_executable_offset;
3548
3549 #define PARAMETER_FIELDS_DO(macro) \
3550 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3551 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3552 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \
3553 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3554
3555 void java_lang_reflect_Parameter::compute_offsets() {
3556 InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3557 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3558 }
3559
3560 #if INCLUDE_CDS
3561 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3562 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3563 }
3564 #endif
3565
3566 Handle java_lang_reflect_Parameter::create(TRAPS) {
3567 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3568 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3569 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3570 InstanceKlass* ik = InstanceKlass::cast(k);
3571 // Ensure it is initialized
3572 ik->initialize(CHECK_NH);
3573 return ik->allocate_instance_handle(THREAD);
3574 }
3575
3576 oop java_lang_reflect_Parameter::name(oop param) {
3577 return param->obj_field(_name_offset);
3578 }
3579
3580 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3581 param->obj_field_put(_name_offset, value);
3582 }
3583
3584 int java_lang_reflect_Parameter::modifiers(oop param) {
3585 return param->int_field(_modifiers_offset);
3586 }
3587
3588 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3589 param->int_field_put(_modifiers_offset, value);
3590 }
3591
3592 int java_lang_reflect_Parameter::index(oop param) {
3593 return param->int_field(_index_offset);
3594 }
3595
3596 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3597 param->int_field_put(_index_offset, value);
3598 }
3599
3600 oop java_lang_reflect_Parameter::executable(oop param) {
3601 return param->obj_field(_executable_offset);
3602 }
3603
3604 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3605 param->obj_field_put(_executable_offset, value);
3606 }
3607
3608 // java_lang_Module
3609
3610 int java_lang_Module::_loader_offset;
3611 int java_lang_Module::_name_offset;
3612 int java_lang_Module::_module_entry_offset;
3613
3614 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3615 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3616 return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3617 vmSymbols::java_lang_module_init_signature(),
3618 loader, module_name, CHECK_NH);
3619 }
3620
3621 #define MODULE_FIELDS_DO(macro) \
3622 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3623 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false)
3624
3625 void java_lang_Module::compute_offsets() {
3626 InstanceKlass* k = vmClasses::Module_klass();
3627 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3628 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3629 }
3630
3631 #if INCLUDE_CDS
3632 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3633 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3634 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3635 }
3636 #endif
3637
3638 oop java_lang_Module::loader(oop module) {
3639 return module->obj_field(_loader_offset);
3640 }
3641
3642 void java_lang_Module::set_loader(oop module, oop value) {
3643 module->obj_field_put(_loader_offset, value);
3644 }
3645
3646 oop java_lang_Module::name(oop module) {
3647 return module->obj_field(_name_offset);
3648 }
3649
3650 void java_lang_Module::set_name(oop module, oop value) {
3651 module->obj_field_put(_name_offset, value);
3652 }
3653
3654 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3655 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3656 assert(module != nullptr, "module can't be null");
3657 assert(oopDesc::is_oop(module), "module must be oop");
3658
3659 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3660 return module_entry;
3661 }
3662
3663 ModuleEntry* java_lang_Module::module_entry(oop module) {
3664 ModuleEntry* module_entry = module_entry_raw(module);
3665 if (module_entry == nullptr) {
3666 // If the inject field containing the ModuleEntry* is null then return the
3667 // class loader's unnamed module.
3668 oop loader = java_lang_Module::loader(module);
3669 Handle h_loader = Handle(Thread::current(), loader);
3670 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3671 return loader_cld->unnamed_module();
3672 }
3673 return module_entry;
3674 }
3675
3676 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3677 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3678 assert(module != nullptr, "module can't be null");
3679 assert(oopDesc::is_oop(module), "module must be oop");
3680 module->address_field_put(_module_entry_offset, (address)module_entry);
3681 }
3682
3683 Handle reflect_ConstantPool::create(TRAPS) {
3684 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3685 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3686 // Ensure it is initialized
3687 k->initialize(CHECK_NH);
3688 return k->allocate_instance_handle(THREAD);
3689 }
3690
3691
3692 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3693 oop mirror = value->pool_holder()->java_mirror();
3694 // Save the mirror to get back the constant pool.
3695 reflect->obj_field_put(_oop_offset, mirror);
3696 }
3697
3698 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3699
3700 oop mirror = reflect->obj_field(_oop_offset);
3701 Klass* k = java_lang_Class::as_Klass(mirror);
3702 assert(k->is_instance_klass(), "Must be");
3703
3704 // Get the constant pool back from the klass. Since class redefinition
3705 // merges the new constant pool into the old, this is essentially the
3706 // same constant pool as the original. If constant pool merging is
3707 // no longer done in the future, this will have to change to save
3708 // the original.
3709 return InstanceKlass::cast(k)->constants();
3710 }
3711
3712
3713 // Support for java_lang_ref_Reference
3714
3715 bool java_lang_ref_Reference::_offsets_initialized;
3716
3717 int java_lang_ref_Reference::_referent_offset;
3718 int java_lang_ref_Reference::_queue_offset;
3719 int java_lang_ref_Reference::_next_offset;
3720 int java_lang_ref_Reference::_discovered_offset;
3721
3722 #define REFERENCE_FIELDS_DO(macro) \
3723 macro(_referent_offset, k, "referent", object_signature, false); \
3724 macro(_queue_offset, k, "queue", referencequeue_signature, false); \
3725 macro(_next_offset, k, "next", reference_signature, false); \
3726 macro(_discovered_offset, k, "discovered", reference_signature, false);
3727
3728 void java_lang_ref_Reference::compute_offsets() {
3729 if (_offsets_initialized) {
3730 return;
3731 }
3732 _offsets_initialized = true;
3733 InstanceKlass* k = vmClasses::Reference_klass();
3734 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3735 }
3736
3737 #if INCLUDE_CDS
3738 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3739 f->do_bool(&_offsets_initialized);
3740 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3741 }
3742 #endif
3743
3744 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3745 assert(obj != nullptr, "sanity");
3746 if (offset != _referent_offset) {
3747 return false;
3748 }
3749
3750 Klass* k = obj->klass();
3751 if (!k->is_instance_klass()) {
3752 return false;
3753 }
3754
3755 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3756 bool is_reference = ik->reference_type() != REF_NONE;
3757 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
3758 return is_reference;
3759 }
3760
3761 int java_lang_boxing_object::_value_offset;
3762 int java_lang_boxing_object::_long_value_offset;
3763
3764 #define BOXING_FIELDS_DO(macro) \
3765 macro(_value_offset, integerKlass, "value", int_signature, false); \
3766 macro(_long_value_offset, longKlass, "value", long_signature, false);
3767
3768 void java_lang_boxing_object::compute_offsets() {
3769 InstanceKlass* integerKlass = vmClasses::Integer_klass();
3770 InstanceKlass* longKlass = vmClasses::Long_klass();
3771 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3772 }
3773
3774 #if INCLUDE_CDS
3775 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
3776 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3777 }
3778 #endif
3779
3780 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3781 Klass* k = vmClasses::box_klass(type);
3782 if (k == nullptr) return nullptr;
3783 InstanceKlass* ik = InstanceKlass::cast(k);
3784 if (!ik->is_initialized()) {
3785 ik->initialize(CHECK_NULL);
3786 }
3787 return ik->allocate_instance(THREAD);
3788 }
3789
3790
3791 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3792 oop box = initialize_and_allocate(type, CHECK_NULL);
3793 if (box == nullptr) return nullptr;
3794 switch (type) {
3795 case T_BOOLEAN:
3796 box->bool_field_put(_value_offset, value->z);
3797 break;
3798 case T_CHAR:
3799 box->char_field_put(_value_offset, value->c);
3800 break;
3801 case T_FLOAT:
3802 box->float_field_put(_value_offset, value->f);
3803 break;
3804 case T_DOUBLE:
3805 box->double_field_put(_long_value_offset, value->d);
3806 break;
3807 case T_BYTE:
3808 box->byte_field_put(_value_offset, value->b);
3809 break;
3810 case T_SHORT:
3811 box->short_field_put(_value_offset, value->s);
3812 break;
3813 case T_INT:
3814 box->int_field_put(_value_offset, value->i);
3815 break;
3816 case T_LONG:
3817 box->long_field_put(_long_value_offset, value->j);
3818 break;
3819 default:
3820 return nullptr;
3821 }
3822 return box;
3823 }
3824
3825
3826 BasicType java_lang_boxing_object::basic_type(oop box) {
3827 if (box == nullptr) return T_ILLEGAL;
3828 BasicType type = vmClasses::box_klass_type(box->klass());
3829 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3830 return T_ILLEGAL;
3831 return type;
3832 }
3833
3834
3835 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3836 BasicType type = vmClasses::box_klass_type(box->klass());
3837 switch (type) {
3838 case T_BOOLEAN:
3839 value->z = box->bool_field(_value_offset);
3840 break;
3841 case T_CHAR:
3842 value->c = box->char_field(_value_offset);
3843 break;
3844 case T_FLOAT:
3845 value->f = box->float_field(_value_offset);
3846 break;
3847 case T_DOUBLE:
3848 value->d = box->double_field(_long_value_offset);
3849 break;
3850 case T_BYTE:
3851 value->b = box->byte_field(_value_offset);
3852 break;
3853 case T_SHORT:
3854 value->s = box->short_field(_value_offset);
3855 break;
3856 case T_INT:
3857 value->i = box->int_field(_value_offset);
3858 break;
3859 case T_LONG:
3860 value->j = box->long_field(_long_value_offset);
3861 break;
3862 default:
3863 return T_ILLEGAL;
3864 } // end switch
3865 return type;
3866 }
3867
3868
3869 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3870 BasicType type = vmClasses::box_klass_type(box->klass());
3871 switch (type) {
3872 case T_BOOLEAN:
3873 box->bool_field_put(_value_offset, value->z);
3874 break;
3875 case T_CHAR:
3876 box->char_field_put(_value_offset, value->c);
3877 break;
3878 case T_FLOAT:
3879 box->float_field_put(_value_offset, value->f);
3880 break;
3881 case T_DOUBLE:
3882 box->double_field_put(_long_value_offset, value->d);
3883 break;
3884 case T_BYTE:
3885 box->byte_field_put(_value_offset, value->b);
3886 break;
3887 case T_SHORT:
3888 box->short_field_put(_value_offset, value->s);
3889 break;
3890 case T_INT:
3891 box->int_field_put(_value_offset, value->i);
3892 break;
3893 case T_LONG:
3894 box->long_field_put(_long_value_offset, value->j);
3895 break;
3896 default:
3897 return T_ILLEGAL;
3898 } // end switch
3899 return type;
3900 }
3901
3902
3903 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3904 switch (type) {
3905 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3906 case T_CHAR: st->print("%d", value->c); break;
3907 case T_BYTE: st->print("%d", value->b); break;
3908 case T_SHORT: st->print("%d", value->s); break;
3909 case T_INT: st->print("%d", value->i); break;
3910 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3911 case T_FLOAT: st->print("%f", value->f); break;
3912 case T_DOUBLE: st->print("%lf", value->d); break;
3913 default: st->print("type %d?", type); break;
3914 }
3915 }
3916
3917
3918 // Support for java_lang_ref_SoftReference
3919 //
3920
3921 int java_lang_ref_SoftReference::_timestamp_offset;
3922 int java_lang_ref_SoftReference::_static_clock_offset;
3923
3924 #define SOFTREFERENCE_FIELDS_DO(macro) \
3925 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
3926 macro(_static_clock_offset, k, "clock", long_signature, true)
3927
3928 void java_lang_ref_SoftReference::compute_offsets() {
3929 InstanceKlass* k = vmClasses::SoftReference_klass();
3930 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3931 }
3932
3933 #if INCLUDE_CDS
3934 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3935 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3936 }
3937 #endif
3938
3939 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3940 return ref->long_field(_timestamp_offset);
3941 }
3942
3943 jlong java_lang_ref_SoftReference::clock() {
3944 InstanceKlass* ik = vmClasses::SoftReference_klass();
3945 oop base = ik->static_field_base_raw();
3946 return base->long_field(_static_clock_offset);
3947 }
3948
3949 void java_lang_ref_SoftReference::set_clock(jlong value) {
3950 InstanceKlass* ik = vmClasses::SoftReference_klass();
3951 oop base = ik->static_field_base_raw();
3952 base->long_field_put(_static_clock_offset, value);
3953 }
3954
3955 // Support for java_lang_invoke_DirectMethodHandle
3956
3957 int java_lang_invoke_DirectMethodHandle::_member_offset;
3958
3959 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3960 oop member_name = nullptr;
3961 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3962 "a DirectMethodHandle oop is expected");
3963 return dmh->obj_field(_member_offset);
3964 }
3965
3966 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3967 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3968
3969 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3970 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
3971 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3972 }
3973
3974 #if INCLUDE_CDS
3975 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3976 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3977 }
3978 #endif
3979
3980 // Support for java_lang_invoke_MethodHandle
3981
3982 int java_lang_invoke_MethodHandle::_type_offset;
3983 int java_lang_invoke_MethodHandle::_form_offset;
3984
3985 int java_lang_invoke_MemberName::_clazz_offset;
3986 int java_lang_invoke_MemberName::_name_offset;
3987 int java_lang_invoke_MemberName::_type_offset;
3988 int java_lang_invoke_MemberName::_flags_offset;
3989 int java_lang_invoke_MemberName::_method_offset;
3990 int java_lang_invoke_MemberName::_vmindex_offset;
3991
3992 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3993 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3994
3995 int java_lang_invoke_LambdaForm::_vmentry_offset;
3996
3997 #define METHODHANDLE_FIELDS_DO(macro) \
3998 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3999 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
4000
4001 void java_lang_invoke_MethodHandle::compute_offsets() {
4002 InstanceKlass* k = vmClasses::MethodHandle_klass();
4003 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4004 }
4005
4006 #if INCLUDE_CDS
4007 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4008 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4009 }
4010 #endif
4011
4012 #define MEMBERNAME_FIELDS_DO(macro) \
4013 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4014 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4015 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
4016 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
4017 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
4018
4019 void java_lang_invoke_MemberName::compute_offsets() {
4020 InstanceKlass* k = vmClasses::MemberName_klass();
4021 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4022 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4023 }
4024
4025 #if INCLUDE_CDS
4026 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4027 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4028 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4029 }
4030 #endif
4031
4032 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4033 macro(_vmholder_offset, k, "vmholder", class_signature, false)
4034
4035 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4036 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4037 assert(k != nullptr, "jdk mismatch");
4038 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4039 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4040 }
4041
4042 #if INCLUDE_CDS
4043 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4044 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4045 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4046 }
4047 #endif
4048
4049 #define LAMBDAFORM_FIELDS_DO(macro) \
4050 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4051
4052 void java_lang_invoke_LambdaForm::compute_offsets() {
4053 InstanceKlass* k = vmClasses::LambdaForm_klass();
4054 assert (k != nullptr, "jdk mismatch");
4055 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4056 }
4057
4058 #if INCLUDE_CDS
4059 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4060 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4061 }
4062 #endif
4063
4064 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4065 return obj != nullptr && is_subclass(obj->klass());
4066 }
4067
4068 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4069 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4070
4071 #define NEP_FIELDS_DO(macro) \
4072 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
4073 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4074
4075 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4076 return obj != nullptr && is_subclass(obj->klass());
4077 }
4078
4079 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4080 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4081 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4082 }
4083
4084 #if INCLUDE_CDS
4085 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4086 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4087 }
4088 #endif
4089
4090 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4091 return entry->obj_field(_method_type_offset);
4092 }
4093
4094 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4095 return entry->long_field(_downcall_stub_address_offset);
4096 }
4097
4098 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4099 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4100 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4101 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4102 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4103 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4104 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4105
4106 #define ABIDescriptor_FIELDS_DO(macro) \
4107 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4108 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4109 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4110 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4111 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4112 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4113 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4114
4115 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4116 return obj != nullptr && is_subclass(obj->klass());
4117 }
4118
4119 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4120 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4121 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4122 }
4123
4124 #if INCLUDE_CDS
4125 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4126 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4127 }
4128 #endif
4129
4130 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4131 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4132 }
4133
4134 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4135 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4136 }
4137
4138 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4139 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4140 }
4141
4142 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4143 return entry->int_field(_stackAlignment_offset);
4144 }
4145
4146 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4147 return entry->int_field(_shadowSpace_offset);
4148 }
4149
4150 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4151 return entry->obj_field(_scratch1_offset);
4152 }
4153
4154 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4155 return entry->obj_field(_scratch2_offset);
4156 }
4157
4158 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4159 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4160 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4161 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4162
4163 #define VMStorage_FIELDS_DO(macro) \
4164 macro(_type_offset, k, "type", byte_signature, false); \
4165 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4166 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4167 macro(_debugName_offset, k, "debugName", string_signature, false); \
4168
4169 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4170 return obj != nullptr && is_subclass(obj->klass());
4171 }
4172
4173 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4174 InstanceKlass* k = vmClasses::VMStorage_klass();
4175 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4176 }
4177
4178 #if INCLUDE_CDS
4179 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4180 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4181 }
4182 #endif
4183
4184 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4185 return entry->byte_field(_type_offset);
4186 }
4187
4188 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4189 return entry->int_field(_indexOrOffset_offset);
4190 }
4191
4192 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4193 return entry->short_field(_segmentMaskOrSize_offset);
4194 }
4195
4196 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4197 return entry->obj_field(_debugName_offset);
4198 }
4199
4200 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4201 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4202
4203 #define CallConv_FIELDS_DO(macro) \
4204 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4205 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4206
4207 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4208 return obj != nullptr && is_subclass(obj->klass());
4209 }
4210
4211 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4212 InstanceKlass* k = vmClasses::CallConv_klass();
4213 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4214 }
4215
4216 #if INCLUDE_CDS
4217 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4218 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4219 }
4220 #endif
4221
4222 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4223 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4224 }
4225
4226 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4227 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4228 }
4229
4230 oop java_lang_invoke_MethodHandle::type(oop mh) {
4231 return mh->obj_field(_type_offset);
4232 }
4233
4234 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4235 mh->obj_field_put(_type_offset, mtype);
4236 }
4237
4238 oop java_lang_invoke_MethodHandle::form(oop mh) {
4239 assert(_form_offset != 0, "");
4240 return mh->obj_field(_form_offset);
4241 }
4242
4243 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4244 assert(_form_offset != 0, "");
4245 mh->obj_field_put(_form_offset, lform);
4246 }
4247
4248 /// MemberName accessors
4249
4250 oop java_lang_invoke_MemberName::clazz(oop mname) {
4251 assert(is_instance(mname), "wrong type");
4252 return mname->obj_field(_clazz_offset);
4253 }
4254
4255 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4256 assert(is_instance(mname), "wrong type");
4257 mname->obj_field_put(_clazz_offset, clazz);
4258 }
4259
4260 oop java_lang_invoke_MemberName::name(oop mname) {
4261 assert(is_instance(mname), "wrong type");
4262 return mname->obj_field(_name_offset);
4263 }
4264
4265 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4266 assert(is_instance(mname), "wrong type");
4267 mname->obj_field_put(_name_offset, name);
4268 }
4269
4270 oop java_lang_invoke_MemberName::type(oop mname) {
4271 assert(is_instance(mname), "wrong type");
4272 return mname->obj_field(_type_offset);
4273 }
4274
4275 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4276 assert(is_instance(mname), "wrong type");
4277 mname->obj_field_put(_type_offset, type);
4278 }
4279
4280 int java_lang_invoke_MemberName::flags(oop mname) {
4281 assert(is_instance(mname), "wrong type");
4282 return mname->int_field(_flags_offset);
4283 }
4284
4285 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4286 assert(is_instance(mname), "wrong type");
4287 mname->int_field_put(_flags_offset, flags);
4288 }
4289
4290
4291 // Return vmtarget from ResolvedMethodName method field through indirection
4292 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4293 assert(is_instance(mname), "wrong type");
4294 oop method = mname->obj_field(_method_offset);
4295 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4296 }
4297
4298 bool java_lang_invoke_MemberName::is_method(oop mname) {
4299 assert(is_instance(mname), "must be MemberName");
4300 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
4301 }
4302
4303 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4304 assert(is_instance(mname), "wrong type");
4305 mname->obj_field_put(_method_offset, resolved_method);
4306 }
4307
4308 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4309 assert(is_instance(mname), "wrong type");
4310 return (intptr_t) mname->address_field(_vmindex_offset);
4311 }
4312
4313 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4314 assert(is_instance(mname), "wrong type");
4315 mname->address_field_put(_vmindex_offset, (address) index);
4316 }
4317
4318
4319 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4320 assert(is_instance(resolved_method), "wrong type");
4321 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4322 assert(m->is_method(), "must be");
4323 return m;
4324 }
4325
4326 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4327 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4328 assert(is_instance(resolved_method), "wrong type");
4329 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4330 }
4331
4332 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4333 assert(is_instance(resolved_method), "wrong type");
4334 resolved_method->obj_field_put(_vmholder_offset, holder);
4335 }
4336
4337 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4338 const Method* method = m();
4339
4340 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4341 oop resolved_method = ResolvedMethodTable::find_method(method);
4342 if (resolved_method != nullptr) {
4343 return resolved_method;
4344 }
4345
4346 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4347 if (!k->is_initialized()) {
4348 k->initialize(CHECK_NULL);
4349 }
4350
4351 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4352
4353 NoSafepointVerifier nsv;
4354
4355 if (method->is_old()) {
4356 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4357 method->get_new_method();
4358 }
4359
4360 InstanceKlass* holder = method->method_holder();
4361
4362 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4363 // Add a reference to the loader (actually mirror because hidden classes may not have
4364 // distinct loaders) to ensure the metadata is kept alive.
4365 // This mirror may be different than the one in clazz field.
4366 set_vmholder(new_resolved_method, holder->java_mirror());
4367
4368 // Set flag in class to indicate this InstanceKlass has entries in the table
4369 // to avoid walking table during redefinition if none of the redefined classes
4370 // have any membernames in the table.
4371 holder->set_has_resolved_methods();
4372
4373 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4374 }
4375
4376 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4377 assert(is_instance(lform), "wrong type");
4378 return lform->obj_field(_vmentry_offset);
4379 }
4380
4381
4382 // Support for java_lang_invoke_MethodType
4383
4384 int java_lang_invoke_MethodType::_rtype_offset;
4385 int java_lang_invoke_MethodType::_ptypes_offset;
4386
4387 #define METHODTYPE_FIELDS_DO(macro) \
4388 macro(_rtype_offset, k, "rtype", class_signature, false); \
4389 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4390
4391 void java_lang_invoke_MethodType::compute_offsets() {
4392 InstanceKlass* k = vmClasses::MethodType_klass();
4393 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4394 }
4395
4396 #if INCLUDE_CDS
4397 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4398 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4399 }
4400 #endif
4401
4402 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4403 st->print("(");
4404 objArrayOop pts = ptypes(mt);
4405 if (pts != nullptr) {
4406 for (int i = 0, limit = pts->length(); i < limit; i++) {
4407 java_lang_Class::print_signature(pts->obj_at(i), st);
4408 }
4409 } else {
4410 st->print("null");
4411 }
4412 st->print(")");
4413 oop rt = rtype(mt);
4414 if (rt != nullptr) {
4415 java_lang_Class::print_signature(rt, st);
4416 } else {
4417 st->print("null");
4418 }
4419 }
4420
4421 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4422 ResourceMark rm;
4423 stringStream buffer(128);
4424 print_signature(mt, &buffer);
4425 const char* sigstr = buffer.base();
4426 int siglen = (int) buffer.size();
4427 Symbol *name;
4428 if (!intern_if_not_found) {
4429 name = SymbolTable::probe(sigstr, siglen);
4430 } else {
4431 name = SymbolTable::new_symbol(sigstr, siglen);
4432 }
4433 return name;
4434 }
4435
4436 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4437 if (mt1 == mt2)
4438 return true;
4439 if (rtype(mt1) != rtype(mt2))
4440 return false;
4441 if (ptype_count(mt1) != ptype_count(mt2))
4442 return false;
4443 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4444 if (ptype(mt1, i) != ptype(mt2, i))
4445 return false;
4446 }
4447 return true;
4448 }
4449
4450 oop java_lang_invoke_MethodType::rtype(oop mt) {
4451 assert(is_instance(mt), "must be a MethodType");
4452 return mt->obj_field(_rtype_offset);
4453 }
4454
4455 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4456 assert(is_instance(mt), "must be a MethodType");
4457 return (objArrayOop) mt->obj_field(_ptypes_offset);
4458 }
4459
4460 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4461 return ptypes(mt)->obj_at(idx);
4462 }
4463
4464 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4465 return ptypes(mt)->length();
4466 }
4467
4468 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4469 objArrayOop pts = ptypes(mt);
4470 int count = pts->length();
4471 int slots = 0;
4472 for (int i = 0; i < count; i++) {
4473 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4474 slots += type2size[bt];
4475 }
4476 return slots;
4477 }
4478
4479 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4480 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4481 return type2size[bt];
4482 }
4483
4484
4485 // Support for java_lang_invoke_CallSite
4486
4487 int java_lang_invoke_CallSite::_target_offset;
4488 int java_lang_invoke_CallSite::_context_offset;
4489
4490 #define CALLSITE_FIELDS_DO(macro) \
4491 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
4492 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
4493
4494 void java_lang_invoke_CallSite::compute_offsets() {
4495 InstanceKlass* k = vmClasses::CallSite_klass();
4496 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4497 }
4498
4499 #if INCLUDE_CDS
4500 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4501 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4502 }
4503 #endif
4504
4505 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
4506 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4507
4508 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
4509 return dep_oop;
4510 }
4511
4512 // Support for java_lang_invoke_ConstantCallSite
4513
4514 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4515
4516 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4517 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4518
4519 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4520 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4521 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4522 }
4523
4524 #if INCLUDE_CDS
4525 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4526 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4527 }
4528 #endif
4529
4530 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
4531
4532 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
4533 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
4534
4535 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
4536 InstanceKlass* k = vmClasses::Context_klass();
4537 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4538 }
4539
4540 #if INCLUDE_CDS
4541 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
4542 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4543 }
4544 #endif
4545
4546 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
4547 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
4548 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4549 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4550 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4551 return dep_ctx;
4552 }
4553
4554 // Support for java_security_AccessControlContext
4555
4556 int java_security_AccessControlContext::_context_offset;
4557 int java_security_AccessControlContext::_privilegedContext_offset;
4558 int java_security_AccessControlContext::_isPrivileged_offset;
4559 int java_security_AccessControlContext::_isAuthorized_offset;
4560
4561 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
4562 macro(_context_offset, k, "context", protectiondomain_signature, false); \
4563 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
4564 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
4565 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
4566
4567 void java_security_AccessControlContext::compute_offsets() {
4568 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
4569 InstanceKlass* k = vmClasses::AccessControlContext_klass();
4570 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4571 }
4572
4573 #if INCLUDE_CDS
4574 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
4575 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4576 }
4577 #endif
4578
4579 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
4580 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
4581 assert(_isAuthorized_offset != 0, "offsets should have been initialized");
4582 // Ensure klass is initialized
4583 vmClasses::AccessControlContext_klass()->initialize(CHECK_NULL);
4584 // Allocate result
4585 oop result = vmClasses::AccessControlContext_klass()->allocate_instance(CHECK_NULL);
4586 // Fill in values
4587 result->obj_field_put(_context_offset, context());
4588 result->obj_field_put(_privilegedContext_offset, privileged_context());
4589 result->bool_field_put(_isPrivileged_offset, isPrivileged);
4590 result->bool_field_put(_isAuthorized_offset, true);
4591 return result;
4592 }
4593
4594
4595 // Support for java_lang_ClassLoader
4596
4597 int java_lang_ClassLoader::_loader_data_offset;
4598 int java_lang_ClassLoader::_parallelCapable_offset;
4599 int java_lang_ClassLoader::_name_offset;
4600 int java_lang_ClassLoader::_nameAndId_offset;
4601 int java_lang_ClassLoader::_unnamedModule_offset;
4602 int java_lang_ClassLoader::_parent_offset;
4603
4604 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4605 assert(loader != nullptr, "loader must not be null");
4606 assert(oopDesc::is_oop(loader), "loader must be oop");
4607 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4608 }
4609
4610 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4611 assert(loader != nullptr, "loader must not be null");
4612 assert(oopDesc::is_oop(loader), "loader must be oop");
4613 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4614 }
4615
4616 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4617 assert(loader != nullptr, "loader must not be null");
4618 assert(oopDesc::is_oop(loader), "loader must be oop");
4619 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4620 }
4621
4622 #define CLASSLOADER_FIELDS_DO(macro) \
4623 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4624 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4625 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
4626 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4627 macro(_parent_offset, k1, "parent", classloader_signature, false)
4628
4629 void java_lang_ClassLoader::compute_offsets() {
4630 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4631 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4632
4633 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4634 }
4635
4636 #if INCLUDE_CDS
4637 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4638 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4639 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4640 }
4641 #endif
4642
4643 oop java_lang_ClassLoader::parent(oop loader) {
4644 assert(is_instance(loader), "loader must be oop");
4645 return loader->obj_field(_parent_offset);
4646 }
4647
4648 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4649 assert(is_instance(loader), "loader must be oop");
4650 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4651 }
4652
4653 // Returns the name field of this class loader. If the name field has not
4654 // been set, null will be returned.
4655 oop java_lang_ClassLoader::name(oop loader) {
4656 assert(is_instance(loader), "loader must be oop");
4657 return loader->obj_field(_name_offset);
4658 }
4659
4660 // Returns the nameAndId field of this class loader. The format is
4661 // as follows:
4662 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4663 // If the defining loader has no name then <qualified-class-name> @<id>
4664 // If built-in loader, then omit '@<id>' as there is only one instance.
4665 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4666 oop java_lang_ClassLoader::nameAndId(oop loader) {
4667 assert(is_instance(loader), "loader must be oop");
4668 return loader->obj_field(_nameAndId_offset);
4669 }
4670
4671 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4672 assert(is_instance(loader), "loader must be oop");
4673 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4674 oop acl = loader;
4675 debug_only(jint loop_count = 0);
4676 // This loop taken verbatim from ClassLoader.java:
4677 do {
4678 acl = parent(acl);
4679 if (cl == acl) {
4680 return true;
4681 }
4682 assert(++loop_count > 0, "loop_count overflow");
4683 } while (acl != nullptr);
4684 return false;
4685 }
4686
4687 bool java_lang_ClassLoader::is_instance(oop obj) {
4688 return obj != nullptr && is_subclass(obj->klass());
4689 }
4690
4691
4692 // For class loader classes, parallelCapable defined
4693 // based on non-null field
4694 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4695 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4696 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4697 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4698 }
4699
4700 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4701 // Fix for 4474172; see evaluation for more details
4702 loader = non_reflection_class_loader(loader);
4703
4704 oop cl = SystemDictionary::java_system_loader();
4705 while(cl != nullptr) {
4706 if (cl == loader) return true;
4707 cl = parent(cl);
4708 }
4709 return false;
4710 }
4711
4712 // Return true if this is one of the class loaders associated with
4713 // the generated bytecodes for serialization constructor returned
4714 // by sun.reflect.ReflectionFactory::newConstructorForSerialization
4715 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
4716 if (loader != nullptr) {
4717 Klass* delegating_cl_class = vmClasses::reflect_DelegatingClassLoader_klass();
4718 // This might be null in non-1.4 JDKs
4719 return (delegating_cl_class != nullptr && loader->is_a(delegating_cl_class));
4720 }
4721 return false;
4722 }
4723
4724 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4725 // See whether this is one of the class loaders associated with
4726 // the generated bytecodes for reflection, and if so, "magically"
4727 // delegate to its parent to prevent class loading from occurring
4728 // in places where applications using reflection didn't expect it.
4729 if (is_reflection_class_loader(loader)) {
4730 return parent(loader);
4731 }
4732 return loader;
4733 }
4734
4735 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4736 assert(is_instance(loader), "loader must be oop");
4737 return loader->obj_field(_unnamedModule_offset);
4738 }
4739
4740 // Support for java_lang_System
4741 //
4742
4743 int java_lang_System::_static_in_offset;
4744 int java_lang_System::_static_out_offset;
4745 int java_lang_System::_static_err_offset;
4746 int java_lang_System::_static_security_offset;
4747 int java_lang_System::_static_allow_security_offset;
4748 int java_lang_System::_static_never_offset;
4749
4750 #define SYSTEM_FIELDS_DO(macro) \
4751 macro(_static_in_offset, k, "in", input_stream_signature, true); \
4752 macro(_static_out_offset, k, "out", print_stream_signature, true); \
4753 macro(_static_err_offset, k, "err", print_stream_signature, true); \
4754 macro(_static_security_offset, k, "security", security_manager_signature, true); \
4755 macro(_static_allow_security_offset, k, "allowSecurityManager", int_signature, true); \
4756 macro(_static_never_offset, k, "NEVER", int_signature, true)
4757
4758 void java_lang_System::compute_offsets() {
4759 InstanceKlass* k = vmClasses::System_klass();
4760 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4761 }
4762
4763 // This field tells us that a security manager can never be installed so we
4764 // can completely skip populating the ProtectionDomainCacheTable.
4765 bool java_lang_System::allow_security_manager() {
4766 static int initialized = false;
4767 static bool allowed = true; // default
4768 if (!initialized) {
4769 oop base = vmClasses::System_klass()->static_field_base_raw();
4770 int never = base->int_field(_static_never_offset);
4771 allowed = (base->int_field(_static_allow_security_offset) != never);
4772 initialized = true;
4773 }
4774 return allowed;
4775 }
4776
4777 // This field tells us that a security manager is installed.
4778 bool java_lang_System::has_security_manager() {
4779 oop base = vmClasses::System_klass()->static_field_base_raw();
4780 return base->obj_field(_static_security_offset) != nullptr;
4781 }
4782
4783 #if INCLUDE_CDS
4784 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4785 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4786 }
4787 #endif
4788
4789 // Support for jdk_internal_misc_UnsafeConstants
4790 //
4791 class UnsafeConstantsFixup : public FieldClosure {
4792 private:
4793 int _address_size;
4794 int _page_size;
4795 bool _big_endian;
4796 bool _use_unaligned_access;
4797 int _data_cache_line_flush_size;
4798 public:
4799 UnsafeConstantsFixup() {
4800 // round up values for all static final fields
4801 _address_size = sizeof(void*);
4802 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4803 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4804 _use_unaligned_access = UseUnalignedAccesses;
4805 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4806 }
4807
4808 void do_field(fieldDescriptor* fd) {
4809 oop mirror = fd->field_holder()->java_mirror();
4810 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4811 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4812 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4813 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4814 if (fd->name() == vmSymbols::address_size_name()) {
4815 mirror->int_field_put(fd->offset(), _address_size);
4816 } else if (fd->name() == vmSymbols::page_size_name()) {
4817 mirror->int_field_put(fd->offset(), _page_size);
4818 } else if (fd->name() == vmSymbols::big_endian_name()) {
4819 mirror->bool_field_put(fd->offset(), _big_endian);
4820 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4821 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4822 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4823 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4824 } else {
4825 assert(false, "unexpected UnsafeConstants field");
4826 }
4827 }
4828 };
4829
4830 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4831 UnsafeConstantsFixup fixup;
4832 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4833 }
4834
4835
4836 // java_lang_StackTraceElement
4837
4838 int java_lang_StackTraceElement::_methodName_offset;
4839 int java_lang_StackTraceElement::_fileName_offset;
4840 int java_lang_StackTraceElement::_lineNumber_offset;
4841 int java_lang_StackTraceElement::_moduleName_offset;
4842 int java_lang_StackTraceElement::_moduleVersion_offset;
4843 int java_lang_StackTraceElement::_classLoaderName_offset;
4844 int java_lang_StackTraceElement::_declaringClass_offset;
4845 int java_lang_StackTraceElement::_declaringClassObject_offset;
4846
4847 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4848 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4849 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4850 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
4851 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4852 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
4853 macro(_methodName_offset, k, "methodName", string_signature, false); \
4854 macro(_fileName_offset, k, "fileName", string_signature, false); \
4855 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
4856
4857 // Support for java_lang_StackTraceElement
4858 void java_lang_StackTraceElement::compute_offsets() {
4859 InstanceKlass* k = vmClasses::StackTraceElement_klass();
4860 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4861 }
4862
4863 #if INCLUDE_CDS
4864 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4865 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4866 }
4867 #endif
4868
4869 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4870 element->obj_field_put(_fileName_offset, value);
4871 }
4872
4873 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4874 element->obj_field_put(_declaringClass_offset, value);
4875 }
4876
4877 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4878 element->obj_field_put(_methodName_offset, value);
4879 }
4880
4881 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4882 element->int_field_put(_lineNumber_offset, value);
4883 }
4884
4885 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4886 element->obj_field_put(_moduleName_offset, value);
4887 }
4888
4889 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4890 element->obj_field_put(_moduleVersion_offset, value);
4891 }
4892
4893 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4894 element->obj_field_put(_classLoaderName_offset, value);
4895 }
4896
4897 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4898 element->obj_field_put(_declaringClassObject_offset, value);
4899 }
4900
4901
4902 // java_lang_AssertionStatusDirectives
4903
4904 int java_lang_AssertionStatusDirectives::_classes_offset;
4905 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
4906 int java_lang_AssertionStatusDirectives::_packages_offset;
4907 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
4908 int java_lang_AssertionStatusDirectives::_deflt_offset;
4909
4910 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4911 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4912 macro(_classes_offset, k, "classes", string_array_signature, false); \
4913 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4914 macro(_packages_offset, k, "packages", string_array_signature, false); \
4915 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4916 macro(_deflt_offset, k, "deflt", bool_signature, false)
4917
4918 void java_lang_AssertionStatusDirectives::compute_offsets() {
4919 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
4920 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4921 }
4922
4923 #if INCLUDE_CDS
4924 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4925 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4926 }
4927 #endif
4928
4929 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4930 o->obj_field_put(_classes_offset, val);
4931 }
4932
4933 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4934 o->obj_field_put(_classEnabled_offset, val);
4935 }
4936
4937 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4938 o->obj_field_put(_packages_offset, val);
4939 }
4940
4941 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4942 o->obj_field_put(_packageEnabled_offset, val);
4943 }
4944
4945 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4946 o->bool_field_put(_deflt_offset, val);
4947 }
4948
4949 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4950
4951 #define AOS_FIELDS_DO(macro) \
4952 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4953
4954 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4955 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4956 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4957 }
4958
4959 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4960 assert(_owner_offset != 0, "Must be initialized");
4961 return obj->obj_field(_owner_offset);
4962 }
4963
4964 #if INCLUDE_CDS
4965 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4966 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4967 }
4968 #endif
4969
4970 int vector_VectorPayload::_payload_offset;
4971
4972 #define VECTORPAYLOAD_FIELDS_DO(macro) \
4973 macro(_payload_offset, k, "payload", object_signature, false)
4974
4975 void vector_VectorPayload::compute_offsets() {
4976 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
4977 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4978 }
4979
4980 #if INCLUDE_CDS
4981 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
4982 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4983 }
4984 #endif
4985
4986 void vector_VectorPayload::set_payload(oop o, oop val) {
4987 o->obj_field_put(_payload_offset, val);
4988 }
4989
4990 bool vector_VectorPayload::is_instance(oop obj) {
4991 return obj != nullptr && is_subclass(obj->klass());
4992 }
4993
4994 int java_lang_Integer_IntegerCache::_static_cache_offset;
4995 int java_lang_Long_LongCache::_static_cache_offset;
4996 int java_lang_Character_CharacterCache::_static_cache_offset;
4997 int java_lang_Short_ShortCache::_static_cache_offset;
4998 int java_lang_Byte_ByteCache::_static_cache_offset;
4999
5000 #define INTEGER_CACHE_FIELDS_DO(macro) \
5001 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5002
5003 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5004 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5005 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5006 }
5007
5008 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5009 oop base = ik->static_field_base_raw();
5010 return objArrayOop(base->obj_field(_static_cache_offset));
5011 }
5012
5013 Symbol* java_lang_Integer_IntegerCache::symbol() {
5014 return vmSymbols::java_lang_Integer_IntegerCache();
5015 }
5016
5017 #if INCLUDE_CDS
5018 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5019 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5020 }
5021 #endif
5022 #undef INTEGER_CACHE_FIELDS_DO
5023
5024 jint java_lang_Integer::value(oop obj) {
5025 jvalue v;
5026 java_lang_boxing_object::get_value(obj, &v);
5027 return v.i;
5028 }
5029
5030 #define LONG_CACHE_FIELDS_DO(macro) \
5031 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5032
5033 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5034 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5035 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5036 }
5037
5038 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5039 oop base = ik->static_field_base_raw();
5040 return objArrayOop(base->obj_field(_static_cache_offset));
5041 }
5042
5043 Symbol* java_lang_Long_LongCache::symbol() {
5044 return vmSymbols::java_lang_Long_LongCache();
5045 }
5046
5047 #if INCLUDE_CDS
5048 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5049 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5050 }
5051 #endif
5052 #undef LONG_CACHE_FIELDS_DO
5053
5054 jlong java_lang_Long::value(oop obj) {
5055 jvalue v;
5056 java_lang_boxing_object::get_value(obj, &v);
5057 return v.j;
5058 }
5059
5060 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5061 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5062
5063 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5064 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5065 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5066 }
5067
5068 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5069 oop base = ik->static_field_base_raw();
5070 return objArrayOop(base->obj_field(_static_cache_offset));
5071 }
5072
5073 Symbol* java_lang_Character_CharacterCache::symbol() {
5074 return vmSymbols::java_lang_Character_CharacterCache();
5075 }
5076
5077 #if INCLUDE_CDS
5078 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5079 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5080 }
5081 #endif
5082 #undef CHARACTER_CACHE_FIELDS_DO
5083
5084 jchar java_lang_Character::value(oop obj) {
5085 jvalue v;
5086 java_lang_boxing_object::get_value(obj, &v);
5087 return v.c;
5088 }
5089
5090 #define SHORT_CACHE_FIELDS_DO(macro) \
5091 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5092
5093 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5094 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5095 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5096 }
5097
5098 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5099 oop base = ik->static_field_base_raw();
5100 return objArrayOop(base->obj_field(_static_cache_offset));
5101 }
5102
5103 Symbol* java_lang_Short_ShortCache::symbol() {
5104 return vmSymbols::java_lang_Short_ShortCache();
5105 }
5106
5107 #if INCLUDE_CDS
5108 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5109 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5110 }
5111 #endif
5112 #undef SHORT_CACHE_FIELDS_DO
5113
5114 jshort java_lang_Short::value(oop obj) {
5115 jvalue v;
5116 java_lang_boxing_object::get_value(obj, &v);
5117 return v.s;
5118 }
5119
5120 #define BYTE_CACHE_FIELDS_DO(macro) \
5121 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5122
5123 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5124 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5125 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5126 }
5127
5128 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5129 oop base = ik->static_field_base_raw();
5130 return objArrayOop(base->obj_field(_static_cache_offset));
5131 }
5132
5133 Symbol* java_lang_Byte_ByteCache::symbol() {
5134 return vmSymbols::java_lang_Byte_ByteCache();
5135 }
5136
5137 #if INCLUDE_CDS
5138 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5139 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5140 }
5141 #endif
5142 #undef BYTE_CACHE_FIELDS_DO
5143
5144 jbyte java_lang_Byte::value(oop obj) {
5145 jvalue v;
5146 java_lang_boxing_object::get_value(obj, &v);
5147 return v.b;
5148 }
5149
5150 int java_lang_Boolean::_static_TRUE_offset;
5151 int java_lang_Boolean::_static_FALSE_offset;
5152
5153 #define BOOLEAN_FIELDS_DO(macro) \
5154 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5155 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5156
5157
5158 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5159 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5160 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5161 }
5162
5163 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5164 oop base = ik->static_field_base_raw();
5165 return base->obj_field(_static_TRUE_offset);
5166 }
5167
5168 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5169 oop base = ik->static_field_base_raw();
5170 return base->obj_field(_static_FALSE_offset);
5171 }
5172
5173 Symbol* java_lang_Boolean::symbol() {
5174 return vmSymbols::java_lang_Boolean();
5175 }
5176
5177 #if INCLUDE_CDS
5178 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5179 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5180 }
5181 #endif
5182 #undef BOOLEAN_CACHE_FIELDS_DO
5183
5184 jboolean java_lang_Boolean::value(oop obj) {
5185 jvalue v;
5186 java_lang_boxing_object::get_value(obj, &v);
5187 return v.z;
5188 }
5189
5190 // java_lang_reflect_RecordComponent
5191
5192 int java_lang_reflect_RecordComponent::_clazz_offset;
5193 int java_lang_reflect_RecordComponent::_name_offset;
5194 int java_lang_reflect_RecordComponent::_type_offset;
5195 int java_lang_reflect_RecordComponent::_accessor_offset;
5196 int java_lang_reflect_RecordComponent::_signature_offset;
5197 int java_lang_reflect_RecordComponent::_annotations_offset;
5198 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5199
5200 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5201 macro(_clazz_offset, k, "clazz", class_signature, false); \
5202 macro(_name_offset, k, "name", string_signature, false); \
5203 macro(_type_offset, k, "type", class_signature, false); \
5204 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5205 macro(_signature_offset, k, "signature", string_signature, false); \
5206 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5207 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5208
5209 // Support for java_lang_reflect_RecordComponent
5210 void java_lang_reflect_RecordComponent::compute_offsets() {
5211 InstanceKlass* k = vmClasses::RecordComponent_klass();
5212 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5213 }
5214
5215 #if INCLUDE_CDS
5216 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5217 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5218 }
5219 #endif
5220
5221 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5222 element->obj_field_put(_clazz_offset, value);
5223 }
5224
5225 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5226 element->obj_field_put(_name_offset, value);
5227 }
5228
5229 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5230 element->obj_field_put(_type_offset, value);
5231 }
5232
5233 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5234 element->obj_field_put(_accessor_offset, value);
5235 }
5236
5237 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5238 element->obj_field_put(_signature_offset, value);
5239 }
5240
5241 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5242 element->obj_field_put(_annotations_offset, value);
5243 }
5244
5245 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5246 element->obj_field_put(_typeAnnotations_offset, value);
5247 }
5248
5249 // java_lang_InternalError
5250 int java_lang_InternalError::_during_unsafe_access_offset;
5251
5252 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5253 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5254 }
5255
5256 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5257 return internal_error->bool_field(_during_unsafe_access_offset);
5258 }
5259
5260 void java_lang_InternalError::compute_offsets() {
5261 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5262 }
5263
5264 #if INCLUDE_CDS
5265 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5266 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5267 }
5268 #endif
5269
5270 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5271 f(java_lang_Class) \
5272 f(java_lang_String) \
5273 f(java_lang_ref_Reference) \
5274 //end
5275
5276 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5277 f(java_lang_System) \
5278 f(java_lang_ClassLoader) \
5279 f(java_lang_Throwable) \
5280 f(java_lang_Thread) \
5281 f(java_lang_Thread_FieldHolder) \
5282 f(java_lang_Thread_Constants) \
5283 f(java_lang_ThreadGroup) \
5284 f(java_lang_VirtualThread) \
5285 f(java_lang_InternalError) \
5286 f(java_lang_AssertionStatusDirectives) \
5287 f(java_lang_ref_SoftReference) \
5288 f(java_lang_invoke_MethodHandle) \
5289 f(java_lang_invoke_DirectMethodHandle) \
5290 f(java_lang_invoke_MemberName) \
5291 f(java_lang_invoke_ResolvedMethodName) \
5292 f(java_lang_invoke_LambdaForm) \
5293 f(java_lang_invoke_MethodType) \
5294 f(java_lang_invoke_CallSite) \
5295 f(java_lang_invoke_ConstantCallSite) \
5296 f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \
5297 f(java_security_AccessControlContext) \
5298 f(java_lang_reflect_AccessibleObject) \
5299 f(java_lang_reflect_Method) \
5300 f(java_lang_reflect_Constructor) \
5301 f(java_lang_reflect_Field) \
5302 f(java_lang_reflect_RecordComponent) \
5303 f(reflect_ConstantPool) \
5304 f(java_lang_reflect_Parameter) \
5305 f(java_lang_Module) \
5306 f(java_lang_StackTraceElement) \
5307 f(java_lang_ClassFrameInfo) \
5308 f(java_lang_StackFrameInfo) \
5309 f(java_lang_LiveStackFrameInfo) \
5310 f(jdk_internal_vm_ContinuationScope) \
5311 f(jdk_internal_vm_Continuation) \
5312 f(jdk_internal_vm_StackChunk) \
5313 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5314 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5315 f(jdk_internal_foreign_abi_ABIDescriptor) \
5316 f(jdk_internal_foreign_abi_VMStorage) \
5317 f(jdk_internal_foreign_abi_CallConv) \
5318 f(jdk_internal_misc_UnsafeConstants) \
5319 f(java_lang_boxing_object) \
5320 f(vector_VectorPayload) \
5321 //end
5322
5323 #define BASIC_JAVA_CLASSES_DO(f) \
5324 BASIC_JAVA_CLASSES_DO_PART1(f) \
5325 BASIC_JAVA_CLASSES_DO_PART2(f)
5326
5327 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5328
5329 // Compute field offsets of all the classes in this file
5330 void JavaClasses::compute_offsets() {
5331 if (UseSharedSpaces) {
5332 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5333 JvmtiExport::has_early_class_hook_env()),
5334 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5335 // None of the classes used by the rest of this function can be replaced by
5336 // JVMTI ClassFileLoadHook.
5337 // We are safe to use the archived offsets, which have already been restored
5338 // by JavaClasses::serialize_offsets, without computing the offsets again.
5339 return;
5340 }
5341
5342 // We have already called the compute_offsets() of the
5343 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5344 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5345 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5346 }
5347
5348 #if INCLUDE_CDS
5349 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5350
5351 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5352 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5353 }
5354 #endif
5355
5356 #if INCLUDE_CDS_JAVA_HEAP
5357 bool JavaClasses::is_supported_for_archiving(oop obj) {
5358 Klass* klass = obj->klass();
5359
5360 if (klass == vmClasses::ClassLoader_klass() || // ClassLoader::loader_data is malloc'ed.
5361 // The next 3 classes are used to implement java.lang.invoke, and are not used directly in
5362 // regular Java code. The implementation of java.lang.invoke uses generated hidden classes
5363 // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS.
5364 // So for now we cannot not support these classes for archiving.
5365 //
5366 // These objects typically are not referenced by static fields, but rather by resolved
5367 // constant pool entries, so excluding them shouldn't affect the archiving of static fields.
5368 klass == vmClasses::ResolvedMethodName_klass() ||
5369 klass == vmClasses::MemberName_klass() ||
5370 klass == vmClasses::Context_klass() ||
5371 // It's problematic to archive Reference objects. One of the reasons is that
5372 // Reference::discovered may pull in unwanted objects (see JDK-8284336)
5373 klass->is_subclass_of(vmClasses::Reference_klass())) {
5374 return false;
5375 }
5376
5377 return true;
5378 }
5379 #endif
5380
5381 #ifndef PRODUCT
5382
5383 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5384
5385 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5386 const char* field_sig) {
5387 EXCEPTION_MARK;
5388 fieldDescriptor fd;
5389 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5390 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5391 InstanceKlass* ik = InstanceKlass::cast(k);
5392 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5393 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5394 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5395 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5396 return false;
5397 }
5398 if (fd.is_static()) {
5399 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5400 return false;
5401 }
5402 if (fd.offset() == deserialized_offset ) {
5403 return true;
5404 } else {
5405 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5406 klass_name, field_name, deserialized_offset, fd.offset());
5407 return false;
5408 }
5409 }
5410
5411 void JavaClasses::check_offsets() {
5412 bool valid = true;
5413
5414 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5415 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5416
5417 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5418 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5419
5420 // Boxed primitive objects (java_lang_boxing_object)
5421
5422 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
5423 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5424 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
5425 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5426 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
5427 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
5428 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
5429 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5430
5431 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5432 }
5433
5434 #endif // PRODUCT
5435
5436 int InjectedField::compute_offset() {
5437 InstanceKlass* ik = InstanceKlass::cast(klass());
5438 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5439 if (!may_be_java && !fs.field_flags().is_injected()) {
5440 // Only look at injected fields
5441 continue;
5442 }
5443 if (fs.name() == name() && fs.signature() == signature()) {
5444 return fs.offset();
5445 }
5446 }
5447 ResourceMark rm;
5448 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)" : "");
5449 #ifndef PRODUCT
5450 ik->print();
5451 tty->print_cr("all fields:");
5452 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5453 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
5454 }
5455 #endif //PRODUCT
5456 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5457 return -1;
5458 }
5459
5460 void javaClasses_init() {
5461 JavaClasses::compute_offsets();
5462 JavaClasses::check_offsets();
5463 FilteredFieldsMap::initialize(); // must be done after computing offsets.
5464 }