1 /*
2 * Copyright (c) 1997, 2025, 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 "cds/aotMetaspace.hpp"
26 #include "cds/aotReferenceObjSupport.hpp"
27 #include "cds/archiveBuilder.hpp"
28 #include "cds/archiveHeapLoader.hpp"
29 #include "cds/cdsConfig.hpp"
30 #include "cds/heapShared.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.inline.hpp"
59 #include "oops/method.inline.hpp"
60 #include "oops/objArrayKlass.hpp"
61 #include "oops/objArrayOop.inline.hpp"
62 #include "oops/oop.inline.hpp"
63 #include "oops/oopCast.inline.hpp"
64 #include "oops/recordComponent.hpp"
65 #include "oops/symbol.hpp"
66 #include "oops/typeArrayOop.inline.hpp"
67 #include "prims/jvmtiExport.hpp"
68 #include "prims/methodHandles.hpp"
69 #include "prims/resolvedMethodTable.hpp"
70 #include "runtime/continuationEntry.inline.hpp"
71 #include "runtime/continuationJavaClasses.inline.hpp"
72 #include "runtime/fieldDescriptor.inline.hpp"
73 #include "runtime/frame.inline.hpp"
74 #include "runtime/handles.inline.hpp"
75 #include "runtime/handshake.hpp"
76 #include "runtime/init.hpp"
77 #include "runtime/interfaceSupport.inline.hpp"
78 #include "runtime/java.hpp"
79 #include "runtime/javaCalls.hpp"
80 #include "runtime/javaThread.hpp"
81 #include "runtime/jniHandles.inline.hpp"
82 #include "runtime/reflection.hpp"
83 #include "runtime/safepoint.hpp"
84 #include "runtime/safepointVerifiers.hpp"
85 #include "runtime/threadSMR.hpp"
86 #include "runtime/vframe.inline.hpp"
87 #include "runtime/vm_version.hpp"
88 #include "utilities/align.hpp"
89 #include "utilities/globalDefinitions.hpp"
90 #include "utilities/growableArray.hpp"
91 #include "utilities/preserveException.hpp"
92 #include "utilities/utf8.hpp"
93 #if INCLUDE_JVMCI
94 #include "jvmci/jvmciJavaClasses.hpp"
95 #endif
96
97 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
98 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
99
100 InjectedField JavaClasses::_injected_fields[] = {
101 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
102 };
103
104 // Register native methods of Object
105 void java_lang_Object::register_natives(TRAPS) {
106 InstanceKlass* obj = vmClasses::Object_klass();
107 Method::register_native(obj, vmSymbols::hashCode_name(),
108 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
109 Method::register_native(obj, vmSymbols::wait_name(),
110 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
111 Method::register_native(obj, vmSymbols::notify_name(),
112 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
113 Method::register_native(obj, vmSymbols::notifyAll_name(),
114 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
115 Method::register_native(obj, vmSymbols::clone_name(),
116 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
117 }
118
119 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
120 return _injected_fields[(int)id].compute_offset();
121 }
122
123 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
124 *field_count = 0;
125
126 vmSymbolID sid = vmSymbols::find_sid(class_name);
127 if (sid == vmSymbolID::NO_SID) {
128 // Only well known classes can inject fields
129 return nullptr;
130 }
131
132 int count = 0;
133 int start = -1;
134
135 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
136 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \
137 count++; \
138 if (start == -1) { \
139 start = (int)InjectedFieldID::klass##_##name##_enum; \
140 } \
141 }
142 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
143 #undef LOOKUP_INJECTED_FIELD
144
145 if (start != -1) {
146 *field_count = count;
147 return _injected_fields + start;
148 }
149 return nullptr;
150 }
151
152
153 // Helpful routine for computing field offsets at run time rather than hardcoding them
154 // Finds local fields only, including static fields. Static field offsets are from the
155 // beginning of the mirror.
156 void JavaClasses::compute_offset(int &dest_offset,
157 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
158 bool is_static) {
159 fieldDescriptor fd;
160 if (ik == nullptr) {
161 ResourceMark rm;
162 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
163 vm_exit_during_initialization("Invalid layout of well-known class");
164 }
165
166 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
167 ResourceMark rm;
168 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
169 name_symbol->as_C_string(), signature_symbol->as_C_string());
170 #ifndef PRODUCT
171 // Prints all fields and offsets
172 Log(class) lt;
173 LogStream ls(lt.error());
174 ik->print_on(&ls);
175 #endif //PRODUCT
176 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
177 }
178 dest_offset = fd.offset();
179 }
180
181 // Overloading to pass name as a string.
182 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
183 const char* name_string, Symbol* signature_symbol,
184 bool is_static) {
185 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
186 if (name == nullptr) {
187 ResourceMark rm;
188 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
189 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
190 }
191 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
192 }
193
194 // java_lang_String
195
196 int java_lang_String::_value_offset;
197 int java_lang_String::_hash_offset;
198 int java_lang_String::_hashIsZero_offset;
199 int java_lang_String::_coder_offset;
200 int java_lang_String::_flags_offset;
201
202 bool java_lang_String::_initialized;
203
204
205 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
206 uint8_t* addr = flags_addr(java_string);
207 uint8_t value = AtomicAccess::load(addr);
208 while ((value & flag_mask) == 0) {
209 uint8_t old_value = value;
210 value |= flag_mask;
211 value = AtomicAccess::cmpxchg(addr, old_value, value);
212 if (value == old_value) return false; // Flag bit changed from 0 to 1.
213 }
214 return true; // Flag bit is already 1.
215 }
216
217 #define STRING_FIELDS_DO(macro) \
218 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
219 macro(_hash_offset, k, "hash", int_signature, false); \
220 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
221 macro(_coder_offset, k, "coder", byte_signature, false);
222
223 void java_lang_String::compute_offsets() {
224 if (_initialized) {
225 return;
226 }
227
228 InstanceKlass* k = vmClasses::String_klass();
229 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
230 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
231
232 _initialized = true;
233 }
234
235 #if INCLUDE_CDS
236 void java_lang_String::serialize_offsets(SerializeClosure* f) {
237 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
238 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
239 f->do_bool(&_initialized);
240 }
241 #endif
242
243 class CompactStringsFixup : public FieldClosure {
244 private:
245 bool _value;
246
247 public:
248 CompactStringsFixup(bool value) : _value(value) {}
249
250 void do_field(fieldDescriptor* fd) {
251 if (fd->name() == vmSymbols::compact_strings_name()) {
252 oop mirror = fd->field_holder()->java_mirror();
253 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String");
254 assert(mirror != nullptr, "String must have mirror already");
255 mirror->bool_field_put(fd->offset(), _value);
256 }
257 }
258 };
259
260 void java_lang_String::set_compact_strings(bool value) {
261 CompactStringsFixup fix(value);
262 vmClasses::String_klass()->do_local_static_fields(&fix);
263 }
264
265 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
266 assert(_initialized, "Must be initialized");
267 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
268
269 // Create the String object first, so there's a chance that the String
270 // and the char array it points to end up in the same cache line.
271 oop obj;
272 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH);
273
274 // Create the char array. The String object must be handlized here
275 // because GC can happen as a result of the allocation attempt.
276 Handle h_obj(THREAD, obj);
277 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
278 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
279
280 // Point the String at the char array
281 obj = h_obj();
282 set_value(obj, buffer);
283 // No need to zero the offset, allocation zero'ed the entire String object
284 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
285 return h_obj;
286 }
287
288 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
289 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
290 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
291 typeArrayOop buffer = value(h_obj());
292 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
293 if (is_latin1) {
294 for (int index = 0; index < length; index++) {
295 buffer->byte_at_put(index, (jbyte)unicode[index]);
296 }
297 } else {
298 for (int index = 0; index < length; index++) {
299 buffer->char_at_put(index, unicode[index]);
300 }
301 }
302
303 #ifdef ASSERT
304 {
305 ResourceMark rm;
306 size_t utf8_len = static_cast<size_t>(length);
307 char* expected = UNICODE::as_utf8(unicode, utf8_len);
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, strlen(utf8_str), /*version_leq_47*/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(const 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 // This check is too strict on older classfile versions
392 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, utf8_len, /*version_leq_47*/false))
393 {
394 ResourceMark rm;
395 const char* expected = symbol->as_utf8();
396 char* actual = as_utf8_string(h_obj());
397 if (strncmp(expected, actual, utf8_len) != 0) {
398 fatal("Symbol conversion failure: %s --> %s", expected, actual);
399 }
400 }
401 #endif
402
403 return h_obj;
404 }
405
406 // Converts a C string to a Java String based on current encoding
407 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
408 assert(str != nullptr, "bad arguments");
409
410 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
411 static to_java_string_fn_t _to_java_string_fn = nullptr;
412
413 if (_to_java_string_fn == nullptr) {
414 void *lib_handle = os::native_java_library();
415 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
416 if (_to_java_string_fn == nullptr) {
417 fatal("JNU_NewStringPlatform missing");
418 }
419 }
420
421 jstring js = nullptr;
422 {
423 JavaThread* thread = THREAD;
424 HandleMark hm(thread);
425 ThreadToNativeFromVM ttn(thread);
426 js = (_to_java_string_fn)(thread->jni_environment(), str);
427 }
428
429 Handle native_platform_string(THREAD, JNIHandles::resolve(js));
430 JNIHandles::destroy_local(js); // destroy local JNIHandle.
431 return native_platform_string;
432 }
433
434 // Converts a Java String to a native C string that can be used for
435 // native OS calls.
436 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
437 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
438 static to_platform_string_fn_t _to_platform_string_fn = nullptr;
439
440 if (_to_platform_string_fn == nullptr) {
441 void *lib_handle = os::native_java_library();
442 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
443 if (_to_platform_string_fn == nullptr) {
444 fatal("GetStringPlatformChars missing");
445 }
446 }
447
448 char *native_platform_string;
449 jstring js;
450 { JavaThread* thread = THREAD;
451 js = (jstring) JNIHandles::make_local(thread, java_string());
452 HandleMark hm(thread);
453 ThreadToNativeFromVM ttn(thread);
454 JNIEnv *env = thread->jni_environment();
455 bool is_copy;
456 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
457 assert(is_copy == JNI_TRUE, "is_copy value changed");
458 }
459
460 // Uses a store barrier and therefore needs to be in vm state
461 JNIHandles::destroy_local(js);
462
463 return native_platform_string;
464 }
465
466 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
467 ResourceMark rm(THREAD);
468 return create_from_str(java_name->as_klass_external_name(), THREAD);
469 }
470
471 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
472 jchar* result = as_unicode_string_or_null(java_string, length);
473 if (result == nullptr) {
474 THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
475 }
476 return result;
477 }
478
479 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
480 typeArrayOop value = java_lang_String::value(java_string);
481 length = java_lang_String::length(java_string, value);
482 bool is_latin1 = java_lang_String::is_latin1(java_string);
483
484 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
485 if (result != nullptr) {
486 if (!is_latin1) {
487 for (int index = 0; index < length; index++) {
488 result[index] = value->char_at(index);
489 }
490 } else {
491 for (int index = 0; index < length; index++) {
492 result[index] = ((jchar) value->byte_at(index)) & 0xff;
493 }
494 }
495 }
496 return result;
497 }
498
499 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
500 // The hash and hashIsZero fields are subject to a benign data race,
501 // making it crucial to ensure that any observable result of the
502 // calculation in this method stays correct under any possible read of
503 // these fields. Necessary restrictions to allow this to be correct
504 // without explicit memory fences or similar concurrency primitives is
505 // that we can ever only write to one of these two fields for a given
506 // String instance, and that the computation is idempotent and derived
507 // from immutable state
508 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
509 if (java_lang_String::hash_is_set(java_string)) {
510 return java_string->int_field(_hash_offset);
511 }
512
513 typeArrayOop value = java_lang_String::value(java_string);
514 int length = java_lang_String::length(java_string, value);
515 bool is_latin1 = java_lang_String::is_latin1(java_string);
516
517 unsigned int hash = 0;
518 if (length > 0) {
519 if (is_latin1) {
520 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
521 } else {
522 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
523 }
524 }
525
526 if (update) {
527 if (hash != 0) {
528 java_string->int_field_put(_hash_offset, hash);
529 } else {
530 java_string->bool_field_put(_hashIsZero_offset, true);
531 }
532 }
533 return hash;
534 }
535
536 unsigned int java_lang_String::hash_code(oop java_string) {
537 return hash_code_impl(java_string, /*update=*/true);
538 }
539
540 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
541 return hash_code_impl(java_string, /*update=*/false);
542 }
543
544
545 char* java_lang_String::as_quoted_ascii(oop java_string) {
546 typeArrayOop value = java_lang_String::value(java_string);
547 int length = java_lang_String::length(java_string, value);
548 bool is_latin1 = java_lang_String::is_latin1(java_string);
549
550 if (length == 0) return nullptr;
551
552 char* result;
553 size_t result_length;
554 if (!is_latin1) {
555 jchar* base = value->char_at_addr(0);
556 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
557 result = NEW_RESOURCE_ARRAY(char, result_length);
558 UNICODE::as_quoted_ascii(base, length, result, result_length);
559 } else {
560 jbyte* base = value->byte_at_addr(0);
561 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
562 result = NEW_RESOURCE_ARRAY(char, result_length);
563 UNICODE::as_quoted_ascii(base, length, result, result_length);
564 }
565 assert(result_length >= (size_t)length + 1, "must not be shorter");
566 assert(result_length == strlen(result) + 1, "must match");
567 return result;
568 }
569
570 Symbol* java_lang_String::as_symbol(oop java_string) {
571 typeArrayOop value = java_lang_String::value(java_string);
572 int length = java_lang_String::length(java_string, value);
573 bool is_latin1 = java_lang_String::is_latin1(java_string);
574 if (!is_latin1) {
575 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
576 Symbol* sym = SymbolTable::new_symbol(base, length);
577 return sym;
578 } else {
579 ResourceMark rm;
580 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
581 size_t utf8_len = static_cast<size_t>(length);
582 const char* base = UNICODE::as_utf8(position, utf8_len);
583 Symbol* sym = SymbolTable::new_symbol(base, checked_cast<int>(utf8_len));
584 return sym;
585 }
586 }
587
588 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
589 typeArrayOop value = java_lang_String::value(java_string);
590 int length = java_lang_String::length(java_string, value);
591 bool is_latin1 = java_lang_String::is_latin1(java_string);
592 if (!is_latin1) {
593 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
594 return SymbolTable::probe_unicode(base, length);
595 } else {
596 ResourceMark rm;
597 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
598 size_t utf8_len = static_cast<size_t>(length);
599 const char* base = UNICODE::as_utf8(position, utf8_len);
600 return SymbolTable::probe(base, checked_cast<int>(utf8_len));
601 }
602 }
603
604 size_t java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
605 assert(value_equals(value, java_lang_String::value(java_string)),
606 "value must be same as java_lang_String::value(java_string)");
607 int length = java_lang_String::length(java_string, value);
608 if (length == 0) {
609 return 0;
610 }
611 if (!java_lang_String::is_latin1(java_string)) {
612 return UNICODE::utf8_length(value->char_at_addr(0), length);
613 } else {
614 return UNICODE::utf8_length(value->byte_at_addr(0), length);
615 }
616 }
617
618 size_t java_lang_String::utf8_length(oop java_string) {
619 typeArrayOop value = java_lang_String::value(java_string);
620 return utf8_length(java_string, value);
621 }
622
623 int java_lang_String::utf8_length_as_int(oop java_string) {
624 typeArrayOop value = java_lang_String::value(java_string);
625 return utf8_length_as_int(java_string, value);
626 }
627
628 int java_lang_String::utf8_length_as_int(oop java_string, typeArrayOop value) {
629 assert(value_equals(value, java_lang_String::value(java_string)),
630 "value must be same as java_lang_String::value(java_string)");
631 int length = java_lang_String::length(java_string, value);
632 if (length == 0) {
633 return 0;
634 }
635 if (!java_lang_String::is_latin1(java_string)) {
636 return UNICODE::utf8_length_as_int(value->char_at_addr(0), length);
637 } else {
638 return UNICODE::utf8_length_as_int(value->byte_at_addr(0), length);
639 }
640 }
641
642 char* java_lang_String::as_utf8_string(oop java_string) {
643 size_t length;
644 return as_utf8_string(java_string, length);
645 }
646
647 char* java_lang_String::as_utf8_string(oop java_string, size_t& length) {
648 typeArrayOop value = java_lang_String::value(java_string);
649 // `length` is used as the incoming number of characters to
650 // convert, and then set as the number of bytes in the UTF8 sequence.
651 length = java_lang_String::length(java_string, value);
652 bool is_latin1 = java_lang_String::is_latin1(java_string);
653 if (!is_latin1) {
654 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
655 return UNICODE::as_utf8(position, length);
656 } else {
657 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
658 return UNICODE::as_utf8(position, length);
659 }
660 }
661
662 // Uses a provided buffer if it's sufficiently large, otherwise allocates
663 // a resource array to fit
664 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& utf8_len) {
665 typeArrayOop value = java_lang_String::value(java_string);
666 int len = java_lang_String::length(java_string, value);
667 bool is_latin1 = java_lang_String::is_latin1(java_string);
668 if (!is_latin1) {
669 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
670 utf8_len = UNICODE::utf8_length(position, len);
671 if (utf8_len >= buflen) {
672 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
673 }
674 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
675 } else {
676 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
677 utf8_len = UNICODE::utf8_length(position, len);
678 if (utf8_len >= buflen) {
679 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
680 }
681 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
682 }
683 }
684
685 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen) {
686 assert(value_equals(value, java_lang_String::value(java_string)),
687 "value must be same as java_lang_String::value(java_string)");
688 int length = java_lang_String::length(java_string, value);
689 bool is_latin1 = java_lang_String::is_latin1(java_string);
690 if (!is_latin1) {
691 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
692 return UNICODE::as_utf8(position, length, buf, buflen);
693 } else {
694 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
695 return UNICODE::as_utf8(position, length, buf, buflen);
696 }
697 }
698
699 char* java_lang_String::as_utf8_string(oop java_string, char* buf, size_t buflen) {
700 typeArrayOop value = java_lang_String::value(java_string);
701 return as_utf8_string(java_string, value, buf, buflen);
702 }
703
704 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
705 // `length` is used as the incoming number of characters to
706 // convert, and then set as the number of bytes in the UTF8 sequence.
707 size_t length = static_cast<size_t>(len);
708 typeArrayOop value = java_lang_String::value(java_string);
709 bool is_latin1 = java_lang_String::is_latin1(java_string);
710 assert(start + len <= java_lang_String::length(java_string), "just checking");
711 if (!is_latin1) {
712 jchar* position = value->char_at_addr(start);
713 return UNICODE::as_utf8(position, length);
714 } else {
715 jbyte* position = value->byte_at_addr(start);
716 return UNICODE::as_utf8(position, length);
717 }
718 }
719
720 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen) {
721 assert(value_equals(value, java_lang_String::value(java_string)),
722 "value must be same as java_lang_String::value(java_string)");
723 assert(start + len <= java_lang_String::length(java_string), "just checking");
724 bool is_latin1 = java_lang_String::is_latin1(java_string);
725 if (!is_latin1) {
726 jchar* position = value->char_at_addr(start);
727 return UNICODE::as_utf8(position, len, buf, buflen);
728 } else {
729 jbyte* position = value->byte_at_addr(start);
730 return UNICODE::as_utf8(position, len, buf, buflen);
731 }
732 }
733
734 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
735 assert(java_string->klass() == vmClasses::String_klass(),
736 "must be java_string");
737 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
738 int length = java_lang_String::length(java_string, value);
739 if (length != len) {
740 return false;
741 }
742 bool is_latin1 = java_lang_String::is_latin1(java_string);
743 if (!is_latin1) {
744 for (int i = 0; i < len; i++) {
745 if (value->char_at(i) != chars[i]) {
746 return false;
747 }
748 }
749 } else {
750 for (int i = 0; i < len; i++) {
751 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
752 return false;
753 }
754 }
755 }
756 return true;
757 }
758
759 bool java_lang_String::equals(oop java_string, const char* utf8_string, size_t utf8_len) {
760 assert(java_string->klass() == vmClasses::String_klass(),
761 "must be java_string");
762 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
763 int length = java_lang_String::length(java_string, value);
764 int unicode_length = UTF8::unicode_length(utf8_string, utf8_len);
765 if (length != unicode_length) {
766 return false;
767 }
768 bool is_latin1 = java_lang_String::is_latin1(java_string);
769 jchar c;
770 if (!is_latin1) {
771 for (int i = 0; i < unicode_length; i++) {
772 utf8_string = UTF8::next(utf8_string, &c);
773 if (value->char_at(i) != c) {
774 return false;
775 }
776 }
777 } else {
778 for (int i = 0; i < unicode_length; i++) {
779 utf8_string = UTF8::next(utf8_string, &c);
780 if ((((jchar) value->byte_at(i)) & 0xff) != c) {
781 return false;
782 }
783 }
784 }
785 return true;
786 }
787
788 bool java_lang_String::equals(oop str1, oop str2) {
789 assert(str1->klass() == vmClasses::String_klass(),
790 "must be java String");
791 assert(str2->klass() == vmClasses::String_klass(),
792 "must be java String");
793 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
794 bool is_latin1 = java_lang_String::is_latin1(str1);
795 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
796 bool is_latin2 = java_lang_String::is_latin1(str2);
797
798 if (is_latin1 != is_latin2) {
799 // Strings with different coders are never equal.
800 return false;
801 }
802 return value_equals(value1, value2);
803 }
804
805 // Print the given string to the given outputStream, limiting the output to
806 // at most max_length of the string's characters. If the length exceeds the
807 // limit we print an abridged version of the string with the "middle" elided
808 // and replaced by " ... (N characters ommitted) ... ". If max_length is odd
809 // it is treated as max_length-1.
810 void java_lang_String::print(oop java_string, outputStream* st, int max_length) {
811 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
812 // We need at least two characters to print A ... B
813 assert(max_length > 1, "invalid max_length: %d", max_length);
814
815 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
816
817 if (value == nullptr) {
818 // This can happen if, e.g., printing a String
819 // object before its initializer has been called
820 st->print("nullptr");
821 return;
822 }
823
824 int length = java_lang_String::length(java_string, value);
825 bool is_latin1 = java_lang_String::is_latin1(java_string);
826
827 bool abridge = length > max_length;
828
829 st->print("\"");
830 for (int index = 0; index < length; index++) {
831 // If we need to abridge and we've printed half the allowed characters
832 // then jump to the tail of the string.
833 if (abridge && index >= max_length / 2) {
834 st->print(" ... (%d characters ommitted) ... ", length - 2 * (max_length / 2));
835 index = length - (max_length / 2);
836 abridge = false; // only do this once
837 }
838 jchar c = (!is_latin1) ? value->char_at(index) :
839 ((jchar) value->byte_at(index)) & 0xff;
840 if (c < ' ') {
841 st->print("\\x%02X", c); // print control characters e.g. \x0A
842 } else {
843 st->print("%c", c);
844 }
845 }
846 st->print("\"");
847
848 if (length > max_length) {
849 st->print(" (abridged) ");
850 }
851 }
852
853 // java_lang_Class
854
855 int java_lang_Class::_klass_offset;
856 int java_lang_Class::_array_klass_offset;
857 int java_lang_Class::_oop_size_offset;
858 int java_lang_Class::_static_oop_field_count_offset;
859 int java_lang_Class::_class_loader_offset;
860 int java_lang_Class::_module_offset;
861 int java_lang_Class::_protection_domain_offset;
862 int java_lang_Class::_component_mirror_offset;
863 int java_lang_Class::_init_lock_offset;
864 int java_lang_Class::_signers_offset;
865 int java_lang_Class::_name_offset;
866 int java_lang_Class::_source_file_offset;
867 int java_lang_Class::_classData_offset;
868 int java_lang_Class::_classRedefinedCount_offset;
869 int java_lang_Class::_reflectionData_offset;
870 int java_lang_Class::_modifiers_offset;
871 int java_lang_Class::_is_primitive_offset;
872 int java_lang_Class::_raw_access_flags_offset;
873
874 bool java_lang_Class::_offsets_computed = false;
875 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
876 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
877
878 #ifdef ASSERT
879 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
880 assert(fd->has_initial_value(), "caller should have checked this");
881 assert(fd->field_type() == T_OBJECT, "caller should have checked this");
882 assert(fd->signature() == vmSymbols::string_signature(), "just checking");
883 }
884 #endif
885
886 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
887 DEBUG_ONLY(assert_valid_static_string_field(fd);)
888 oop string = fd->string_initial_value(CHECK);
889 mirror()->obj_field_put(fd->offset(), string);
890 }
891
892 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
893 assert(fd->has_initial_value(), "caller should have checked this");
894 BasicType t = fd->field_type();
895 switch (t) {
896 case T_BYTE:
897 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value()));
898 break;
899 case T_BOOLEAN:
900 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value()));
901 break;
902 case T_CHAR:
903 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value()));
904 break;
905 case T_SHORT:
906 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value()));
907 break;
908 case T_INT:
909 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
910 break;
911 case T_FLOAT:
912 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
913 break;
914 case T_DOUBLE:
915 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
916 break;
917 case T_LONG:
918 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
919 break;
920 default:
921 // Illegal ConstantValue attribute in class file should have been
922 // caught during classfile parsing.
923 ShouldNotReachHere();
924 }
925 }
926
927 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
928 assert(mirror.not_null() && fd->is_static(), "just checking");
929 if (fd->has_initial_value()) {
930 if (fd->field_type() != T_OBJECT) {
931 initialize_static_primitive_field(fd, mirror);
932 } else {
933 initialize_static_string_field(fd, mirror, CHECK);
934 }
935 }
936 }
937
938 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
939 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
940
941 // If the offset was read from the shared archive, it was fixed up already
942 if (!k->in_aot_cache()) {
943 if (k->is_instance_klass()) {
944 // During bootstrap, java.lang.Class wasn't loaded so static field
945 // offsets were computed without the size added it. Go back and
946 // update all the static field offsets to included the size.
947
948 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
949 // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
950 // static fields offsets are updated in this array before reencoding everything into
951 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
952
953 int java_fields;
954 int injected_fields;
955 InstanceKlass* ik = InstanceKlass::cast(k);
956 GrowableArray<FieldInfo>* fields =
957 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
958 &java_fields, &injected_fields);
959 for (int i = 0; i < fields->length(); i++) {
960 FieldInfo* fi = fields->adr_at(i);
961 if (fi->access_flags().is_static()) {
962 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
963 }
964 }
965 Array<u1>* old_stream = ik->fieldinfo_stream();
966 assert(fields->length() == (java_fields + injected_fields), "Must be");
967 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
968 ik->set_fieldinfo_stream(new_fis);
969 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
970
971 Array<u1>* old_table = ik->fieldinfo_search_table();
972 Array<u1>* search_table = FieldInfoStream::create_search_table(ik->constants(), new_fis, k->class_loader_data(), CHECK);
973 ik->set_fieldinfo_search_table(search_table);
974 MetadataFactory::free_array<u1>(k->class_loader_data(), old_table);
975
976 DEBUG_ONLY(FieldInfoStream::validate_search_table(ik->constants(), new_fis, search_table));
977 }
978 }
979
980 if (k->in_aot_cache() && k->has_archived_mirror_index()) {
981 if (ArchiveHeapLoader::is_in_use()) {
982 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
983 assert(present, "Missing archived mirror for %s", k->external_name());
984 return;
985 } else {
986 k->clear_java_mirror_handle();
987 k->clear_archived_mirror_index();
988 }
989 }
990 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
991 }
992
993 void java_lang_Class::initialize_mirror_fields(InstanceKlass* ik,
994 Handle mirror,
995 Handle protection_domain,
996 Handle classData,
997 TRAPS) {
998 // Allocate a simple java object for a lock.
999 // This needs to be a java object because during class initialization
1000 // it can be held across a java call.
1001 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
1002 set_init_lock(mirror(), r);
1003
1004 // Set protection domain also
1005 set_protection_domain(mirror(), protection_domain());
1006
1007 // Initialize static fields
1008 ik->do_local_static_fields(&initialize_static_field, mirror, CHECK);
1009
1010 // Set classData
1011 set_class_data(mirror(), classData());
1012 }
1013
1014 // Set the java.lang.Module module field in the java_lang_Class mirror
1015 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
1016 if (CDSConfig::is_using_aot_linked_classes()) {
1017 oop archived_module = java_lang_Class::module(mirror());
1018 if (archived_module != nullptr) {
1019 precond(module() == nullptr || module() == archived_module);
1020 precond(AOTMetaspace::in_aot_cache_static_region((void*)k));
1021 return;
1022 }
1023 }
1024
1025 if (module.is_null()) {
1026 // During startup, the module may be null only if java.base has not been defined yet.
1027 // Put the class on the fixup_module_list to patch later when the java.lang.Module
1028 // for java.base is known. But note that since we captured the null module another
1029 // thread may have completed that initialization.
1030
1031 // With AOT-linked classes, java.base should have been defined before the
1032 // VM loads any classes.
1033 precond(!CDSConfig::is_using_aot_linked_classes());
1034
1035 bool javabase_was_defined = false;
1036 {
1037 MutexLocker m1(current, Module_lock);
1038 // Keep list of classes needing java.base module fixup
1039 if (!ModuleEntryTable::javabase_defined()) {
1040 assert(k->java_mirror() != nullptr, "Class's mirror is null");
1041 k->class_loader_data()->inc_keep_alive_ref_count();
1042 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
1043 fixup_module_field_list()->push(k);
1044 } else {
1045 javabase_was_defined = true;
1046 }
1047 }
1048
1049 // If java.base was already defined then patch this particular class with java.base.
1050 if (javabase_was_defined) {
1051 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
1052 assert(javabase_entry != nullptr && javabase_entry->module_oop() != nullptr,
1053 "Setting class module field, " JAVA_BASE_NAME " should be defined");
1054 Handle javabase_handle(current, javabase_entry->module_oop());
1055 set_module(mirror(), javabase_handle());
1056 }
1057 } else {
1058 assert(Universe::is_module_initialized() ||
1059 (ModuleEntryTable::javabase_defined() &&
1060 (module() == ModuleEntryTable::javabase_moduleEntry()->module_oop())),
1061 "Incorrect java.lang.Module specification while creating mirror");
1062 set_module(mirror(), module());
1063 }
1064 }
1065
1066 // Statically allocate fixup lists because they always get created.
1067 void java_lang_Class::allocate_fixup_lists() {
1068 if (!CDSConfig::is_using_aot_linked_classes()) {
1069 // fixup_mirror_list() is not used when we have preloaded classes. See
1070 // Universe::fixup_mirrors().
1071 GrowableArray<Klass*>* mirror_list =
1072 new (mtClass) GrowableArray<Klass*>(40, mtClass);
1073 set_fixup_mirror_list(mirror_list);
1074
1075 // With AOT-linked classes, java.base module is defined before any class
1076 // is loaded, so there's no need for fixup_module_field_list().
1077 GrowableArray<Klass*>* module_list =
1078 new (mtModule) GrowableArray<Klass*>(500, mtModule);
1079 set_fixup_module_field_list(module_list);
1080 }
1081 }
1082
1083 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
1084 Handle& mirror, Handle& comp_mirror, TRAPS) {
1085 // Allocate mirror (java.lang.Class instance)
1086 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
1087 mirror = Handle(THREAD, mirror_oop);
1088
1089 // Setup indirection from mirror->klass
1090 set_klass(mirror(), k);
1091
1092 // Set the modifiers flag.
1093 u2 computed_modifiers = k->compute_modifier_flags();
1094 set_modifiers(mirror(), computed_modifiers);
1095 // Set the raw access_flags, this is used by reflection instead of modifier flags.
1096 // The Java code for array classes gets the access flags from the element type.
1097 assert(!k->is_array_klass() || k->access_flags().as_unsigned_short() == 0, "access flags are not set for arrays");
1098 set_raw_access_flags(mirror(), k->access_flags().as_unsigned_short());
1099
1100 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
1101 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
1102
1103 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
1104
1105 // It might also have a component mirror. This mirror must already exist.
1106 if (k->is_array_klass()) {
1107 if (k->is_typeArray_klass()) {
1108 BasicType type = TypeArrayKlass::cast(k)->element_type();
1109 if (is_scratch) {
1110 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
1111 } else {
1112 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
1113 }
1114 } else {
1115 assert(k->is_objArray_klass(), "Must be");
1116 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1117 assert(element_klass != nullptr, "Must have an element klass");
1118 if (is_scratch) {
1119 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1120 } else {
1121 comp_mirror = Handle(THREAD, element_klass->java_mirror());
1122 }
1123 }
1124 assert(comp_mirror() != nullptr, "must have a mirror");
1125
1126 // Two-way link between the array klass and its component mirror:
1127 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1128 set_component_mirror(mirror(), comp_mirror());
1129 // See below for ordering dependencies between field array_klass in component mirror
1130 // and java_mirror in this klass.
1131 } else {
1132 assert(k->is_instance_klass(), "Must be");
1133 initialize_mirror_fields(InstanceKlass::cast(k), mirror, protection_domain, classData, THREAD);
1134 if (HAS_PENDING_EXCEPTION) {
1135 // If any of the fields throws an exception like OOM remove the klass field
1136 // from the mirror so GC doesn't follow it after the klass has been deallocated.
1137 // This mirror looks like a primitive type, which logically it is because it
1138 // it represents no class.
1139 set_klass(mirror(), nullptr);
1140 return;
1141 }
1142 }
1143 }
1144
1145 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1146 Handle module, Handle protection_domain,
1147 Handle classData, TRAPS) {
1148 assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1149 assert(k->java_mirror() == nullptr, "should only assign mirror once");
1150
1151 // Class_klass has to be loaded because it is used to allocate
1152 // the mirror.
1153 if (vmClasses::Class_klass_loaded()) {
1154 Handle mirror;
1155 Handle comp_mirror;
1156
1157 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1158
1159 // set the classLoader field in the java_lang_Class instance
1160 assert(class_loader() == k->class_loader(), "should be same");
1161 set_class_loader(mirror(), class_loader());
1162
1163 // Setup indirection from klass->mirror
1164 // after any exceptions can happen during allocations.
1165 k->set_java_mirror(mirror);
1166
1167 // Set the module field in the java_lang_Class instance. This must be done
1168 // after the mirror is set.
1169 set_mirror_module_field(THREAD, k, mirror, module);
1170
1171 if (comp_mirror() != nullptr) {
1172 // Set after k->java_mirror() is published, because compiled code running
1173 // concurrently doesn't expect a k to have a null java_mirror.
1174 release_set_array_klass(comp_mirror(), k);
1175 }
1176 if (CDSConfig::is_dumping_heap()) {
1177 create_scratch_mirror(k, CHECK);
1178 }
1179 } else {
1180 assert(!CDSConfig::is_using_aot_linked_classes(), "should not come here");
1181 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1182 fixup_mirror_list()->push(k);
1183 }
1184 }
1185
1186 #if INCLUDE_CDS_JAVA_HEAP
1187 // The "scratch mirror" stores the states of the mirror object that can be
1188 // decided at dump time (such as the initial values of the static fields, the
1189 // component mirror, etc). At runtime, more information is added to it by
1190 // java_lang_Class::restore_archived_mirror().
1191 //
1192 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1193 // produces the same result as /*runtime*/create_mirror().
1194 //
1195 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1196 // latter may contain dumptime-specific information that cannot be archived
1197 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1198 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1199 if (k->class_loader() != nullptr &&
1200 k->class_loader() != SystemDictionary::java_platform_loader() &&
1201 k->class_loader() != SystemDictionary::java_system_loader()) {
1202 // We only archive the mirrors of classes loaded by the built-in loaders
1203 return;
1204 }
1205
1206 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1207 Handle mirror;
1208 Handle comp_mirror;
1209 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1210
1211 if (comp_mirror() != nullptr) {
1212 release_set_array_klass(comp_mirror(), k);
1213 }
1214
1215 HeapShared::set_scratch_java_mirror(k, mirror());
1216 }
1217
1218 // Returns true if the mirror is updated, false if no archived mirror
1219 // data is present. After the archived mirror object is restored, the
1220 // shared klass' _has_raw_archived_mirror flag is cleared.
1221 bool java_lang_Class::restore_archived_mirror(Klass *k,
1222 Handle class_loader, Handle module,
1223 Handle protection_domain, TRAPS) {
1224 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1225 // see more details in vmClasses::resolve_all().
1226 if (!vmClasses::Class_klass_loaded() && !CDSConfig::is_using_aot_linked_classes()) {
1227 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1228 fixup_mirror_list()->push(k);
1229 return true;
1230 }
1231
1232 oop m = k->archived_java_mirror();
1233 assert(m != nullptr, "must have stored non-null archived mirror");
1234
1235 // Sanity: clear it now to prevent re-initialization if any of the following fails
1236 k->clear_archived_mirror_index();
1237
1238 // mirror is archived, restore
1239 log_debug(aot, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1240 assert(as_Klass(m) == k, "must be");
1241 Handle mirror(THREAD, m);
1242
1243 if (!k->is_array_klass()) {
1244 // - local static final fields with initial values were initialized at dump time
1245
1246 // create the init_lock
1247 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1248 set_init_lock(mirror(), r);
1249
1250 if (protection_domain.not_null()) {
1251 set_protection_domain(mirror(), protection_domain());
1252 }
1253 }
1254
1255 assert(class_loader() == k->class_loader(), "should be same");
1256 if (class_loader.not_null()) {
1257 set_class_loader(mirror(), class_loader());
1258 }
1259
1260 k->set_java_mirror(mirror);
1261
1262 set_mirror_module_field(THREAD, k, mirror, module);
1263
1264 if (log_is_enabled(Trace, aot, heap, mirror)) {
1265 ResourceMark rm(THREAD);
1266 log_trace(aot, heap, mirror)(
1267 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1268 }
1269
1270 return true;
1271 }
1272 #endif // INCLUDE_CDS_JAVA_HEAP
1273
1274 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1275 assert(_module_offset != 0, "must have been computed already");
1276 set_module(k->java_mirror(), module());
1277 }
1278
1279 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1280 assert(_oop_size_offset != 0, "must be set");
1281 assert(size > 0, "Oop size must be greater than zero, not %zu", size);
1282 assert(size <= INT_MAX, "Lossy conversion: %zu", size);
1283 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1284 }
1285
1286 int java_lang_Class::static_oop_field_count(oop java_class) {
1287 assert(_static_oop_field_count_offset != 0, "must be set");
1288 return java_class->int_field(_static_oop_field_count_offset);
1289 }
1290
1291 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1292 assert(_static_oop_field_count_offset != 0, "must be set");
1293 java_class->int_field_put(_static_oop_field_count_offset, size);
1294 }
1295
1296 oop java_lang_Class::protection_domain(oop java_class) {
1297 assert(_protection_domain_offset != 0, "must be set");
1298 return java_class->obj_field(_protection_domain_offset);
1299 }
1300 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1301 assert(_protection_domain_offset != 0, "must be set");
1302 java_class->obj_field_put(_protection_domain_offset, pd);
1303 }
1304
1305 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1306 assert(_component_mirror_offset != 0, "must be set");
1307 assert(java_lang_Class::as_Klass(java_class) != nullptr &&
1308 java_lang_Class::as_Klass(java_class)->is_array_klass(), "must be");
1309 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1310 }
1311
1312 oop java_lang_Class::component_mirror(oop java_class) {
1313 assert(_component_mirror_offset != 0, "must be set");
1314 return java_class->obj_field(_component_mirror_offset);
1315 }
1316
1317 oop java_lang_Class::init_lock(oop java_class) {
1318 assert(_init_lock_offset != 0, "must be set");
1319 return java_class->obj_field(_init_lock_offset);
1320 }
1321 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1322 assert(_init_lock_offset != 0, "must be set");
1323 java_class->obj_field_put(_init_lock_offset, init_lock);
1324 }
1325
1326 objArrayOop java_lang_Class::signers(oop java_class) {
1327 assert(_signers_offset != 0, "must be set");
1328 return (objArrayOop)java_class->obj_field(_signers_offset);
1329 }
1330
1331 oop java_lang_Class::class_data(oop java_class) {
1332 assert(_classData_offset != 0, "must be set");
1333 return java_class->obj_field(_classData_offset);
1334 }
1335 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1336 assert(_classData_offset != 0, "must be set");
1337 java_class->obj_field_put(_classData_offset, class_data);
1338 }
1339
1340 oop java_lang_Class::reflection_data(oop java_class) {
1341 assert(_reflectionData_offset != 0, "must be set");
1342 return java_class->obj_field(_reflectionData_offset);
1343 }
1344
1345 bool java_lang_Class::has_reflection_data(oop java_class) {
1346 return (java_lang_Class::reflection_data(java_class) != nullptr);
1347 }
1348
1349 void java_lang_Class::set_reflection_data(oop java_class, oop reflection_data) {
1350 assert(_reflectionData_offset != 0, "must be set");
1351 java_class->obj_field_put(_reflectionData_offset, reflection_data);
1352 }
1353
1354 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1355 assert(_class_loader_offset != 0, "offsets should have been initialized");
1356 java_class->obj_field_put(_class_loader_offset, loader);
1357 }
1358
1359 oop java_lang_Class::class_loader(oop java_class) {
1360 assert(_class_loader_offset != 0, "must be set");
1361 return java_class->obj_field(_class_loader_offset);
1362 }
1363
1364 oop java_lang_Class::module(oop java_class) {
1365 assert(_module_offset != 0, "must be set");
1366 return java_class->obj_field(_module_offset);
1367 }
1368
1369 void java_lang_Class::set_module(oop java_class, oop module) {
1370 assert(_module_offset != 0, "must be set");
1371 java_class->obj_field_put(_module_offset, module);
1372 }
1373
1374 oop java_lang_Class::name(Handle java_class, TRAPS) {
1375 assert(_name_offset != 0, "must be set");
1376 oop o = java_class->obj_field(_name_offset);
1377 if (o == nullptr) {
1378 o = StringTable::intern(as_external_name(java_class()), THREAD);
1379 java_class->obj_field_put(_name_offset, o);
1380 }
1381 return o;
1382 }
1383
1384 oop java_lang_Class::source_file(oop java_class) {
1385 assert(_source_file_offset != 0, "must be set");
1386 return java_class->obj_field(_source_file_offset);
1387 }
1388
1389 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1390 assert(_source_file_offset != 0, "must be set");
1391 java_class->obj_field_put(_source_file_offset, source_file);
1392 }
1393
1394 void java_lang_Class::set_is_primitive(oop java_class) {
1395 assert(_is_primitive_offset != 0, "must be set");
1396 java_class->bool_field_put(_is_primitive_offset, true);
1397 }
1398
1399
1400 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1401 // Mirrors for basic types have a null klass field, which makes them special.
1402 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1403 if (type != T_VOID) {
1404 Klass* aklass = Universe::typeArrayKlass(type);
1405 assert(aklass != nullptr, "correct bootstrap");
1406 release_set_array_klass(java_class, aklass);
1407 }
1408 #ifdef ASSERT
1409 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1410 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1411 #endif
1412 set_modifiers(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
1413 set_raw_access_flags(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
1414
1415 set_is_primitive(java_class);
1416 return java_class;
1417 }
1418
1419 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1420 assert(is_instance(java_class), "must be a Class object");
1421 java_class->metadata_field_put(_klass_offset, klass);
1422 }
1423
1424
1425 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1426 assert(is_instance(java_class), "must be a Class object");
1427 Symbol* name = nullptr;
1428 bool is_instance = false;
1429 if (is_primitive(java_class)) {
1430 name = vmSymbols::type_signature(primitive_type(java_class));
1431 } else {
1432 Klass* k = as_Klass(java_class);
1433 is_instance = k->is_instance_klass();
1434 name = k->name();
1435 }
1436 if (name == nullptr) {
1437 st->print("<null>");
1438 return;
1439 }
1440 if (is_instance) st->print("L");
1441 st->write((char*) name->base(), (int) name->utf8_length());
1442 if (is_instance) st->print(";");
1443 }
1444
1445 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1446 assert(is_instance(java_class), "must be a Class object");
1447 Symbol* name;
1448 if (is_primitive(java_class)) {
1449 name = vmSymbols::type_signature(primitive_type(java_class));
1450 // Because this can create a new symbol, the caller has to decrement
1451 // the refcount, so make adjustment here and below for symbols returned
1452 // that are not created or incremented due to a successful lookup.
1453 name->increment_refcount();
1454 } else {
1455 Klass* k = as_Klass(java_class);
1456 if (!k->is_instance_klass()) {
1457 name = k->name();
1458 name->increment_refcount();
1459 } else {
1460 ResourceMark rm;
1461 const char* sigstr = k->signature_name();
1462 int siglen = (int) strlen(sigstr);
1463 if (!intern_if_not_found) {
1464 name = SymbolTable::probe(sigstr, siglen);
1465 } else {
1466 name = SymbolTable::new_symbol(sigstr, siglen);
1467 }
1468 }
1469 }
1470 return name;
1471 }
1472
1473 // Returns the Java name for this Java mirror (Resource allocated)
1474 // See Klass::external_name().
1475 // For primitive type Java mirrors, its type name is returned.
1476 const char* java_lang_Class::as_external_name(oop java_class) {
1477 assert(is_instance(java_class), "must be a Class object");
1478 const char* name = nullptr;
1479 if (is_primitive(java_class)) {
1480 name = type2name(primitive_type(java_class));
1481 } else {
1482 name = as_Klass(java_class)->external_name();
1483 }
1484 if (name == nullptr) {
1485 name = "<null>";
1486 }
1487 return name;
1488 }
1489
1490 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1491 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1492 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass");
1493 return k;
1494 }
1495
1496
1497 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1498 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1499 java_class->release_metadata_field_put(_array_klass_offset, klass);
1500 }
1501
1502
1503 BasicType java_lang_Class::primitive_type(oop java_class) {
1504 assert(is_primitive(java_class), "just checking");
1505 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1506 BasicType type = T_VOID;
1507 if (ak != nullptr) {
1508 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1509 type = ArrayKlass::cast(ak)->element_type();
1510 } else {
1511 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1512 }
1513 #ifdef ASSERT
1514 if (CDSConfig::is_dumping_heap()) {
1515 oop mirror = Universe::java_mirror(type);
1516 oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1517 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1518 } else {
1519 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1520 }
1521 #endif
1522 return type;
1523 }
1524
1525 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1526 assert(is_instance(java_class), "must be a Class object");
1527 if (is_primitive(java_class)) {
1528 if (reference_klass != nullptr)
1529 (*reference_klass) = nullptr;
1530 return primitive_type(java_class);
1531 } else {
1532 if (reference_klass != nullptr)
1533 (*reference_klass) = as_Klass(java_class);
1534 return T_OBJECT;
1535 }
1536 }
1537
1538
1539 oop java_lang_Class::primitive_mirror(BasicType t) {
1540 oop mirror = Universe::java_mirror(t);
1541 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1542 assert(is_primitive(mirror), "must be primitive");
1543 return mirror;
1544 }
1545
1546 #define CLASS_FIELDS_DO(macro) \
1547 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1548 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1549 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1550 macro(_module_offset, k, "module", module_signature, false); \
1551 macro(_name_offset, k, "name", string_signature, false); \
1552 macro(_classData_offset, k, "classData", object_signature, false); \
1553 macro(_reflectionData_offset, k, "reflectionData", class_ReflectionData_signature, false); \
1554 macro(_signers_offset, k, "signers", object_array_signature, false); \
1555 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), char_signature, false); \
1556 macro(_raw_access_flags_offset, k, "classFileAccessFlags", char_signature, false); \
1557 macro(_protection_domain_offset, k, "protectionDomain", java_security_ProtectionDomain_signature, false); \
1558 macro(_is_primitive_offset, k, "primitive", bool_signature, false);
1559
1560 void java_lang_Class::compute_offsets() {
1561 if (_offsets_computed) {
1562 return;
1563 }
1564
1565 _offsets_computed = true;
1566
1567 InstanceKlass* k = vmClasses::Class_klass();
1568 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1569 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1570 }
1571
1572 #if INCLUDE_CDS
1573 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1574 f->do_bool(&_offsets_computed);
1575
1576 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1577
1578 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1579 }
1580 #endif
1581
1582 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1583 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1584 return the_class_mirror->int_field(_classRedefinedCount_offset);
1585 }
1586
1587 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1588 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1589 the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1590 }
1591
1592 int java_lang_Class::modifiers(oop the_class_mirror) {
1593 assert(_modifiers_offset != 0, "offsets should have been initialized");
1594 return the_class_mirror->char_field(_modifiers_offset);
1595 }
1596
1597 void java_lang_Class::set_modifiers(oop the_class_mirror, u2 value) {
1598 assert(_modifiers_offset != 0, "offsets should have been initialized");
1599 the_class_mirror->char_field_put(_modifiers_offset, value);
1600 }
1601
1602 int java_lang_Class::raw_access_flags(oop the_class_mirror) {
1603 assert(_raw_access_flags_offset != 0, "offsets should have been initialized");
1604 return the_class_mirror->char_field(_raw_access_flags_offset);
1605 }
1606
1607 void java_lang_Class::set_raw_access_flags(oop the_class_mirror, u2 value) {
1608 assert(_raw_access_flags_offset != 0, "offsets should have been initialized");
1609 the_class_mirror->char_field_put(_raw_access_flags_offset, value);
1610 }
1611
1612
1613 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1614 // platform thread structure, and a eetop offset which was used for thread
1615 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1616 // merged, so in the HotSpot VM we just use the eetop field for the thread
1617 // instead of the privateInfo_offset.
1618 //
1619 // Note: The stackSize field is only present starting in 1.4.
1620
1621 int java_lang_Thread_FieldHolder::_group_offset;
1622 int java_lang_Thread_FieldHolder::_priority_offset;
1623 int java_lang_Thread_FieldHolder::_stackSize_offset;
1624 int java_lang_Thread_FieldHolder::_daemon_offset;
1625 int java_lang_Thread_FieldHolder::_thread_status_offset;
1626
1627 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1628 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1629 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1630 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1631 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1632 macro(_thread_status_offset, k, "threadStatus", int_signature, false)
1633
1634 void java_lang_Thread_FieldHolder::compute_offsets() {
1635 assert(_group_offset == 0, "offsets should be initialized only once");
1636
1637 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1638 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1639 }
1640
1641 #if INCLUDE_CDS
1642 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1643 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1644 }
1645 #endif
1646
1647 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1648 return holder->obj_field(_group_offset);
1649 }
1650
1651 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1652 return (ThreadPriority)holder->int_field(_priority_offset);
1653 }
1654
1655 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1656 holder->int_field_put(_priority_offset, priority);
1657 }
1658
1659 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1660 return holder->long_field(_stackSize_offset);
1661 }
1662
1663 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1664 return holder->bool_field(_daemon_offset) != 0;
1665 }
1666
1667 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1668 assert(val, "daemon status is never turned off");
1669 holder->bool_field_put(_daemon_offset, val);
1670 }
1671
1672 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1673 holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1674 }
1675
1676 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1677 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1678 }
1679
1680
1681 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1682
1683 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1684 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true);
1685
1686 void java_lang_Thread_Constants::compute_offsets() {
1687 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1688
1689 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1690 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1691 }
1692
1693 #if INCLUDE_CDS
1694 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1695 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1696 }
1697 #endif
1698
1699 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1700 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1701 oop base = k->static_field_base_raw();
1702 return base->obj_field(_static_VTHREAD_GROUP_offset);
1703 }
1704
1705
1706 int java_lang_Thread::_holder_offset;
1707 int java_lang_Thread::_name_offset;
1708 int java_lang_Thread::_contextClassLoader_offset;
1709 int java_lang_Thread::_eetop_offset;
1710 int java_lang_Thread::_jvmti_thread_state_offset;
1711 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1712 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1713 int java_lang_Thread::_interrupted_offset;
1714 int java_lang_Thread::_interruptLock_offset;
1715 int java_lang_Thread::_tid_offset;
1716 int java_lang_Thread::_continuation_offset;
1717 int java_lang_Thread::_park_blocker_offset;
1718 int java_lang_Thread::_scopedValueBindings_offset;
1719 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1720
1721 #define THREAD_FIELDS_DO(macro) \
1722 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \
1723 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1724 macro(_contextClassLoader_offset, k, "contextClassLoader", classloader_signature, false); \
1725 macro(_eetop_offset, k, "eetop", long_signature, false); \
1726 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1727 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \
1728 macro(_tid_offset, k, "tid", long_signature, false); \
1729 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1730 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1731 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1732
1733 void java_lang_Thread::compute_offsets() {
1734 assert(_holder_offset == 0, "offsets should be initialized only once");
1735
1736 InstanceKlass* k = vmClasses::Thread_klass();
1737 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1738 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1739 }
1740
1741 #if INCLUDE_CDS
1742 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1743 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1744 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1745 }
1746 #endif
1747
1748 JavaThread* java_lang_Thread::thread(oop java_thread) {
1749 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1750 }
1751
1752 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1753 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1754 }
1755
1756 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1757 java_thread->address_field_put(_eetop_offset, (address)thread);
1758 }
1759
1760 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1761 java_thread->release_address_field_put(_eetop_offset, (address)thread);
1762 }
1763
1764 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1765 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1766 }
1767
1768 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1769 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1770 }
1771
1772 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1773 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1774 }
1775
1776 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1777 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1778 int val = VTMS_transition_disable_count(java_thread);
1779 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1780 }
1781
1782 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1783 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1784 int val = VTMS_transition_disable_count(java_thread);
1785 assert(val > 0, "VTMS_transition_disable_count should never be negative");
1786 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1787 }
1788
1789 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1790 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1791 }
1792
1793 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1794 assert(is_in_VTMS_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside");
1795 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1796 }
1797
1798 int java_lang_Thread::is_in_VTMS_transition_offset() {
1799 return _jvmti_is_in_VTMS_transition_offset;
1800 }
1801
1802 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1803 assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1804 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1805 }
1806
1807 oop java_lang_Thread::holder(oop java_thread) {
1808 // Note: may return null if the thread is still attaching
1809 return java_thread->obj_field(_holder_offset);
1810 }
1811 oop java_lang_Thread::interrupt_lock(oop java_thread) {
1812 return java_thread->obj_field(_interruptLock_offset);
1813 }
1814
1815 bool java_lang_Thread::interrupted(oop java_thread) {
1816 // Make sure the caller can safely access oops.
1817 assert(Thread::current()->is_VM_thread() ||
1818 (JavaThread::current()->thread_state() != _thread_blocked &&
1819 JavaThread::current()->thread_state() != _thread_in_native),
1820 "Unsafe access to oop");
1821 return java_thread->bool_field_volatile(_interrupted_offset);
1822 }
1823
1824 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1825 // Make sure the caller can safely access oops.
1826 assert(Thread::current()->is_VM_thread() ||
1827 (JavaThread::current()->thread_state() != _thread_blocked &&
1828 JavaThread::current()->thread_state() != _thread_in_native),
1829 "Unsafe access to oop");
1830 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1831 }
1832
1833
1834 oop java_lang_Thread::name(oop java_thread) {
1835 return java_thread->obj_field(_name_offset);
1836 }
1837
1838
1839 void java_lang_Thread::set_name(oop java_thread, oop name) {
1840 java_thread->obj_field_put(_name_offset, name);
1841 }
1842
1843 // Convenience macros for setting and getting Thread fields that
1844 // are actually stored in the FieldHolder object of the thread.
1845 // The FieldHolder can be null whilst a thread is attaching via
1846 // JNI, and when the main thread is attaching.
1847
1848 // The default value should be the default/zero initialized value
1849 // of the field as it would be in java.lang.Thread.FieldHolder.
1850 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \
1851 { \
1852 oop holder = java_lang_Thread::holder(java_thread); \
1853 if (holder != nullptr) \
1854 return java_lang_Thread_FieldHolder::field(holder); \
1855 else \
1856 return default_val; \
1857 }
1858
1859 // We should never be trying to set a field of an attaching thread.
1860 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \
1861 { \
1862 oop holder = java_lang_Thread::holder(java_thread); \
1863 assert(holder != nullptr, "Thread not fully initialized"); \
1864 java_lang_Thread_FieldHolder::set_##field(holder, value); \
1865 }
1866
1867
1868 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1869 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1870 }
1871
1872
1873 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1874 SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1875 }
1876
1877
1878 oop java_lang_Thread::threadGroup(oop java_thread) {
1879 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1880 }
1881
1882
1883 bool java_lang_Thread::is_alive(oop java_thread) {
1884 JavaThread* thr = java_lang_Thread::thread(java_thread);
1885 return (thr != nullptr);
1886 }
1887
1888
1889 bool java_lang_Thread::is_daemon(oop java_thread) {
1890 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1891 }
1892
1893
1894 void java_lang_Thread::set_daemon(oop java_thread) {
1895 SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1896 }
1897
1898 oop java_lang_Thread::context_class_loader(oop java_thread) {
1899 return java_thread->obj_field(_contextClassLoader_offset);
1900 }
1901
1902
1903 jlong java_lang_Thread::stackSize(oop java_thread) {
1904 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1905 }
1906
1907 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1908 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1909 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1910 }
1911
1912 // Read thread status value from threadStatus field in java.lang.Thread java class.
1913 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1914 // Make sure the caller is operating on behalf of the VM or is
1915 // running VM code (state == _thread_in_vm).
1916 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1917 JavaThread::current()->thread_state() == _thread_in_vm ||
1918 JavaThread::current() == java_lang_Thread::thread(java_thread),
1919 "unsafe call to java_lang_Thread::get_thread_status()?");
1920 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1921 }
1922
1923 ByteSize java_lang_Thread::thread_id_offset() {
1924 return in_ByteSize(_tid_offset);
1925 }
1926
1927 oop java_lang_Thread::park_blocker(oop java_thread) {
1928 return java_thread->obj_field_access<MO_RELAXED>(_park_blocker_offset);
1929 }
1930
1931 // Obtain stack trace for platform or mounted virtual thread.
1932 // If jthread is a virtual thread and it has been unmounted (or remounted to different carrier) the method returns null.
1933 // The caller (java.lang.VirtualThread) handles returned nulls via retry.
1934 oop java_lang_Thread::async_get_stack_trace(jobject jthread, TRAPS) {
1935 ThreadsListHandle tlh(THREAD);
1936 JavaThread* java_thread = nullptr;
1937 oop thread_oop;
1938
1939 bool has_java_thread = tlh.cv_internal_thread_to_JavaThread(jthread, &java_thread, &thread_oop);
1940 if (!has_java_thread) {
1941 return nullptr;
1942 }
1943
1944 class GetStackTraceHandshakeClosure : public HandshakeClosure {
1945 public:
1946 const Handle _thread_h;
1947 int _depth;
1948 bool _retry_handshake;
1949 GrowableArray<Method*>* _methods;
1950 GrowableArray<int>* _bcis;
1951
1952 GetStackTraceHandshakeClosure(Handle thread_h) :
1953 HandshakeClosure("GetStackTraceHandshakeClosure"), _thread_h(thread_h), _depth(0), _retry_handshake(false),
1954 _methods(nullptr), _bcis(nullptr) {
1955 }
1956 ~GetStackTraceHandshakeClosure() {
1957 delete _methods;
1958 delete _bcis;
1959 }
1960
1961 bool read_reset_retry() {
1962 bool ret = _retry_handshake;
1963 // If we re-execute the handshake this method need to return false
1964 // when the handshake cannot be performed. (E.g. thread terminating)
1965 _retry_handshake = false;
1966 return ret;
1967 }
1968
1969 void do_thread(Thread* th) {
1970 if (!Thread::current()->is_Java_thread()) {
1971 _retry_handshake = true;
1972 return;
1973 }
1974
1975 JavaThread* java_thread = JavaThread::cast(th);
1976
1977 if (!java_thread->has_last_Java_frame()) {
1978 return;
1979 }
1980
1981 bool carrier = false;
1982 if (java_lang_VirtualThread::is_instance(_thread_h())) {
1983 // Ensure _thread_h is still mounted to java_thread.
1984 const ContinuationEntry* ce = java_thread->vthread_continuation();
1985 if (ce == nullptr || ce->cont_oop(java_thread) != java_lang_VirtualThread::continuation(_thread_h())) {
1986 // Target thread has been unmounted.
1987 return;
1988 }
1989 } else {
1990 carrier = (java_thread->vthread_continuation() != nullptr);
1991 }
1992
1993 const int max_depth = MaxJavaStackTraceDepth;
1994 const bool skip_hidden = !ShowHiddenFrames;
1995
1996 // Pick minimum length that will cover most cases
1997 int init_length = 64;
1998 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1999 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
2000
2001 int total_count = 0;
2002 for (vframeStream vfst(java_thread, false, false, carrier); // we don't process frames as we don't care about oops
2003 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
2004 vfst.next()) {
2005
2006 if (skip_hidden && (vfst.method()->is_hidden() ||
2007 vfst.method()->is_continuation_enter_intrinsic())) {
2008 continue;
2009 }
2010
2011 _methods->push(vfst.method());
2012 _bcis->push(vfst.bci());
2013 total_count++;
2014 }
2015
2016 _depth = total_count;
2017 }
2018 };
2019
2020 // Handshake with target
2021 ResourceMark rm(THREAD);
2022 HandleMark hm(THREAD);
2023 GetStackTraceHandshakeClosure gsthc(Handle(THREAD, thread_oop));
2024 do {
2025 Handshake::execute(&gsthc, &tlh, java_thread);
2026 } while (gsthc.read_reset_retry());
2027
2028 // Stop if no stack trace is found.
2029 if (gsthc._depth == 0) {
2030 return nullptr;
2031 }
2032
2033 // Convert to StackTraceElement array
2034 InstanceKlass* k = vmClasses::StackTraceElement_klass();
2035 assert(k != nullptr, "must be loaded in 1.4+");
2036 if (k->should_be_initialized()) {
2037 k->initialize(CHECK_NULL);
2038 }
2039 objArrayHandle trace = oopFactory::new_objArray_handle(k, gsthc._depth, CHECK_NULL);
2040
2041 for (int i = 0; i < gsthc._depth; i++) {
2042 methodHandle method(THREAD, gsthc._methods->at(i));
2043 oop element = java_lang_StackTraceElement::create(method,
2044 gsthc._bcis->at(i),
2045 CHECK_NULL);
2046 trace->obj_at_put(i, element);
2047 }
2048
2049 return trace();
2050 }
2051
2052 const char* java_lang_Thread::thread_status_name(oop java_thread) {
2053 JavaThreadStatus status = get_thread_status(java_thread);
2054 switch (status) {
2055 case JavaThreadStatus::NEW : return "NEW";
2056 case JavaThreadStatus::RUNNABLE : return "RUNNABLE";
2057 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)";
2058 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)";
2059 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
2060 case JavaThreadStatus::PARKED : return "WAITING (parking)";
2061 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)";
2062 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
2063 case JavaThreadStatus::TERMINATED : return "TERMINATED";
2064 default : return "UNKNOWN";
2065 };
2066 }
2067 int java_lang_ThreadGroup::_parent_offset;
2068 int java_lang_ThreadGroup::_name_offset;
2069 int java_lang_ThreadGroup::_maxPriority_offset;
2070 int java_lang_ThreadGroup::_daemon_offset;
2071
2072 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
2073 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2074 return java_thread_group->obj_field(_parent_offset);
2075 }
2076
2077 // ("name as oop" accessor is not necessary)
2078
2079 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
2080 oop name = java_thread_group->obj_field(_name_offset);
2081 // ThreadGroup.name can be null
2082 if (name != nullptr) {
2083 return java_lang_String::as_utf8_string(name);
2084 }
2085 return nullptr;
2086 }
2087
2088 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
2089 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2090 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
2091 }
2092
2093 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
2094 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2095 return java_thread_group->bool_field(_daemon_offset) != 0;
2096 }
2097
2098 #define THREADGROUP_FIELDS_DO(macro) \
2099 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
2100 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
2101 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
2102 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false);
2103
2104 void java_lang_ThreadGroup::compute_offsets() {
2105 assert(_parent_offset == 0, "offsets should be initialized only once");
2106
2107 InstanceKlass* k = vmClasses::ThreadGroup_klass();
2108 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2109 }
2110
2111 #if INCLUDE_CDS
2112 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
2113 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2114 }
2115 #endif
2116
2117
2118 // java_lang_VirtualThread
2119
2120 int java_lang_VirtualThread::static_vthread_scope_offset;
2121 int java_lang_VirtualThread::_carrierThread_offset;
2122 int java_lang_VirtualThread::_continuation_offset;
2123 int java_lang_VirtualThread::_state_offset;
2124 int java_lang_VirtualThread::_next_offset;
2125 int java_lang_VirtualThread::_onWaitingList_offset;
2126 int java_lang_VirtualThread::_notified_offset;
2127 int java_lang_VirtualThread::_timeout_offset;
2128 int java_lang_VirtualThread::_objectWaiter_offset;
2129
2130 #define VTHREAD_FIELDS_DO(macro) \
2131 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \
2132 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \
2133 macro(_continuation_offset, k, "cont", continuation_signature, false); \
2134 macro(_state_offset, k, "state", int_signature, false); \
2135 macro(_next_offset, k, "next", vthread_signature, false); \
2136 macro(_onWaitingList_offset, k, "onWaitingList", bool_signature, false); \
2137 macro(_notified_offset, k, "notified", bool_signature, false); \
2138 macro(_timeout_offset, k, "timeout", long_signature, false);
2139
2140
2141 void java_lang_VirtualThread::compute_offsets() {
2142 InstanceKlass* k = vmClasses::VirtualThread_klass();
2143 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2144 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2145 }
2146
2147 bool java_lang_VirtualThread::is_instance(oop obj) {
2148 return obj != nullptr && is_subclass(obj->klass());
2149 }
2150
2151 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
2152 oop thread = vthread->obj_field(_carrierThread_offset);
2153 return thread;
2154 }
2155
2156 oop java_lang_VirtualThread::continuation(oop vthread) {
2157 oop cont = vthread->obj_field(_continuation_offset);
2158 return cont;
2159 }
2160
2161 int java_lang_VirtualThread::state(oop vthread) {
2162 return vthread->int_field_acquire(_state_offset);
2163 }
2164
2165 void java_lang_VirtualThread::set_state(oop vthread, int state) {
2166 vthread->release_int_field_put(_state_offset, state);
2167 }
2168
2169 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) {
2170 jint* addr = vthread->field_addr<jint>(_state_offset);
2171 int res = AtomicAccess::cmpxchg(addr, old_state, new_state);
2172 return res;
2173 }
2174
2175 oop java_lang_VirtualThread::next(oop vthread) {
2176 return vthread->obj_field(_next_offset);
2177 }
2178
2179 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) {
2180 vthread->obj_field_put(_next_offset, next_vthread);
2181 }
2182
2183 // Add vthread to the waiting list if it's not already in it. Multiple threads
2184 // could be trying to add vthread to the list at the same time, so we control
2185 // access with a cmpxchg on onWaitingList. The winner adds vthread to the list.
2186 // Method returns true if we added vthread to the list, false otherwise.
2187 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) {
2188 jboolean* addr = vthread->field_addr<jboolean>(_onWaitingList_offset);
2189 jboolean vthread_on_list = AtomicAccess::load(addr);
2190 if (!vthread_on_list) {
2191 vthread_on_list = AtomicAccess::cmpxchg(addr, (jboolean)JNI_FALSE, (jboolean)JNI_TRUE);
2192 if (!vthread_on_list) {
2193 for (;;) {
2194 oop head = list_head.resolve();
2195 java_lang_VirtualThread::set_next(vthread, head);
2196 if (list_head.cmpxchg(head, vthread) == head) return true;
2197 }
2198 }
2199 }
2200 return false; // already on waiting list
2201 }
2202
2203 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) {
2204 vthread->bool_field_put_volatile(_notified_offset, value);
2205 }
2206
2207 jlong java_lang_VirtualThread::timeout(oop vthread) {
2208 return vthread->long_field(_timeout_offset);
2209 }
2210
2211 void java_lang_VirtualThread::set_timeout(oop vthread, jlong value) {
2212 vthread->long_field_put(_timeout_offset, value);
2213 }
2214
2215 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2216 JavaThreadStatus status = JavaThreadStatus::NEW;
2217 switch (state & ~SUSPENDED) {
2218 case NEW:
2219 status = JavaThreadStatus::NEW;
2220 break;
2221 case STARTED:
2222 case RUNNING:
2223 case PARKING:
2224 case TIMED_PARKING:
2225 case UNPARKED:
2226 case YIELDING:
2227 case YIELDED:
2228 case UNBLOCKED:
2229 case WAITING:
2230 case TIMED_WAITING:
2231 status = JavaThreadStatus::RUNNABLE;
2232 break;
2233 case PARKED:
2234 case PINNED:
2235 status = JavaThreadStatus::PARKED;
2236 break;
2237 case TIMED_PARKED:
2238 case TIMED_PINNED:
2239 status = JavaThreadStatus::PARKED_TIMED;
2240 break;
2241 case BLOCKING:
2242 case BLOCKED:
2243 status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER;
2244 break;
2245 case WAIT:
2246 status = JavaThreadStatus::IN_OBJECT_WAIT;
2247 break;
2248 case TIMED_WAIT:
2249 status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED;
2250 break;
2251 case TERMINATED:
2252 status = JavaThreadStatus::TERMINATED;
2253 break;
2254 default:
2255 ShouldNotReachHere();
2256 }
2257 return status;
2258 }
2259
2260 ObjectMonitor* java_lang_VirtualThread::current_pending_monitor(oop vthread) {
2261 ObjectWaiter* waiter = objectWaiter(vthread);
2262 if (waiter != nullptr && waiter->at_monitorenter()) {
2263 return waiter->monitor();
2264 }
2265 return nullptr;
2266 }
2267
2268 ObjectMonitor* java_lang_VirtualThread::current_waiting_monitor(oop vthread) {
2269 ObjectWaiter* waiter = objectWaiter(vthread);
2270 if (waiter != nullptr && waiter->is_wait()) {
2271 return waiter->monitor();
2272 }
2273 return nullptr;
2274 }
2275
2276 bool java_lang_VirtualThread::is_preempted(oop vthread) {
2277 oop continuation = java_lang_VirtualThread::continuation(vthread);
2278 assert(continuation != nullptr, "vthread with no continuation");
2279 stackChunkOop chunk = jdk_internal_vm_Continuation::tail(continuation);
2280 return chunk != nullptr && chunk->preempted();
2281 }
2282
2283 #if INCLUDE_CDS
2284 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2285 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2286 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2287 }
2288 #endif
2289
2290 // java_lang_Throwable
2291
2292 int java_lang_Throwable::_backtrace_offset;
2293 int java_lang_Throwable::_detailMessage_offset;
2294 int java_lang_Throwable::_stackTrace_offset;
2295 int java_lang_Throwable::_depth_offset;
2296 int java_lang_Throwable::_cause_offset;
2297 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2298
2299 #define THROWABLE_FIELDS_DO(macro) \
2300 macro(_backtrace_offset, k, "backtrace", object_signature, false); \
2301 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \
2302 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2303 macro(_depth_offset, k, "depth", int_signature, false); \
2304 macro(_cause_offset, k, "cause", throwable_signature, false); \
2305 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2306
2307 void java_lang_Throwable::compute_offsets() {
2308 InstanceKlass* k = vmClasses::Throwable_klass();
2309 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2310 }
2311
2312 #if INCLUDE_CDS
2313 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2314 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2315 }
2316 #endif
2317
2318 oop java_lang_Throwable::unassigned_stacktrace() {
2319 InstanceKlass* ik = vmClasses::Throwable_klass();
2320 oop base = ik->static_field_base_raw();
2321 return base->obj_field(_static_unassigned_stacktrace_offset);
2322 }
2323
2324 oop java_lang_Throwable::backtrace(oop throwable) {
2325 return throwable->obj_field_acquire(_backtrace_offset);
2326 }
2327
2328
2329 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2330 throwable->release_obj_field_put(_backtrace_offset, value);
2331 }
2332
2333 int java_lang_Throwable::depth(oop throwable) {
2334 return throwable->int_field(_depth_offset);
2335 }
2336
2337 void java_lang_Throwable::set_depth(oop throwable, int value) {
2338 throwable->int_field_put(_depth_offset, value);
2339 }
2340
2341 oop java_lang_Throwable::message(oop throwable) {
2342 return throwable->obj_field(_detailMessage_offset);
2343 }
2344
2345 const char* java_lang_Throwable::message_as_utf8(oop throwable) {
2346 oop msg = java_lang_Throwable::message(throwable);
2347 const char* msg_utf8 = nullptr;
2348 if (msg != nullptr) {
2349 msg_utf8 = java_lang_String::as_utf8_string(msg);
2350 }
2351 return msg_utf8;
2352 }
2353
2354 oop java_lang_Throwable::cause(oop throwable) {
2355 return throwable->obj_field(_cause_offset);
2356 }
2357
2358 void java_lang_Throwable::set_message(oop throwable, oop value) {
2359 throwable->obj_field_put(_detailMessage_offset, value);
2360 }
2361
2362
2363 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2364 throwable->obj_field_put(_stackTrace_offset, st_element_array);
2365 }
2366
2367 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2368 set_stacktrace(throwable, nullptr);
2369 }
2370
2371 oop java_lang_Throwable::create_exception_instance(Symbol* class_name, TRAPS) {
2372 Klass* k = SystemDictionary::resolve_or_fail(class_name, true, CHECK_NULL);
2373 return InstanceKlass::cast(k)->allocate_instance(CHECK_NULL);
2374 }
2375
2376 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2377 ResourceMark rm;
2378 Klass* k = throwable->klass();
2379 assert(k != nullptr, "just checking");
2380 st->print("%s", k->external_name());
2381 oop msg = message(throwable);
2382 if (msg != nullptr) {
2383 st->print(": %s", java_lang_String::as_utf8_string(msg));
2384 }
2385 }
2386
2387 // After this many redefines, the stack trace is unreliable.
2388 const int MAX_VERSION = USHRT_MAX;
2389
2390 static inline bool version_matches(Method* method, int version) {
2391 assert(version < MAX_VERSION, "version is too big");
2392 return method != nullptr && (method->constants()->version() == version);
2393 }
2394
2395 // This class provides a simple wrapper over the internal structure of
2396 // exception backtrace to insulate users of the backtrace from needing
2397 // to know what it looks like.
2398 // The code of this class is not GC safe. Allocations can only happen
2399 // in expand().
2400 class BacktraceBuilder: public StackObj {
2401 friend class BacktraceIterator;
2402 private:
2403 Handle _backtrace;
2404 objArrayOop _head;
2405 typeArrayOop _methods;
2406 typeArrayOop _bcis;
2407 objArrayOop _mirrors;
2408 typeArrayOop _names; // Needed to insulate method name against redefinition.
2409 // True if the top frame of the backtrace is omitted because it shall be hidden.
2410 bool _has_hidden_top_frame;
2411 int _index;
2412 NoSafepointVerifier _nsv;
2413
2414 enum {
2415 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2416 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2417 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2418 trace_names_offset = java_lang_Throwable::trace_names_offset,
2419 trace_conts_offset = java_lang_Throwable::trace_conts_offset,
2420 trace_next_offset = java_lang_Throwable::trace_next_offset,
2421 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2422 trace_size = java_lang_Throwable::trace_size,
2423 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2424 };
2425
2426 // get info out of chunks
2427 static typeArrayOop get_methods(objArrayHandle chunk) {
2428 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2429 assert(methods != nullptr, "method array should be initialized in backtrace");
2430 return methods;
2431 }
2432 static typeArrayOop get_bcis(objArrayHandle chunk) {
2433 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2434 assert(bcis != nullptr, "bci array should be initialized in backtrace");
2435 return bcis;
2436 }
2437 static objArrayOop get_mirrors(objArrayHandle chunk) {
2438 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2439 assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2440 return mirrors;
2441 }
2442 static typeArrayOop get_names(objArrayHandle chunk) {
2443 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2444 assert(names != nullptr, "names array should be initialized in backtrace");
2445 return names;
2446 }
2447 static bool has_hidden_top_frame(objArrayHandle chunk) {
2448 oop hidden = chunk->obj_at(trace_hidden_offset);
2449 return hidden != nullptr;
2450 }
2451
2452 public:
2453
2454 // constructor for new backtrace
2455 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2456 expand(CHECK);
2457 _backtrace = Handle(THREAD, _head);
2458 _index = 0;
2459 }
2460
2461 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2462 _methods = get_methods(backtrace);
2463 _bcis = get_bcis(backtrace);
2464 _mirrors = get_mirrors(backtrace);
2465 _names = get_names(backtrace);
2466 _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2467 assert(_methods->length() == _bcis->length() &&
2468 _methods->length() == _mirrors->length() &&
2469 _mirrors->length() == _names->length(),
2470 "method and source information arrays should match");
2471
2472 // head is the preallocated backtrace
2473 _head = backtrace();
2474 _backtrace = Handle(thread, _head);
2475 _index = 0;
2476 }
2477
2478 void expand(TRAPS) {
2479 objArrayHandle old_head(THREAD, _head);
2480 PauseNoSafepointVerifier pnsv(&_nsv);
2481
2482 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2483 objArrayHandle new_head(THREAD, head);
2484
2485 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2486 typeArrayHandle new_methods(THREAD, methods);
2487
2488 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2489 typeArrayHandle new_bcis(THREAD, bcis);
2490
2491 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2492 objArrayHandle new_mirrors(THREAD, mirrors);
2493
2494 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2495 typeArrayHandle new_names(THREAD, names);
2496
2497 if (!old_head.is_null()) {
2498 old_head->obj_at_put(trace_next_offset, new_head());
2499 }
2500 new_head->obj_at_put(trace_methods_offset, new_methods());
2501 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2502 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2503 new_head->obj_at_put(trace_names_offset, new_names());
2504 new_head->obj_at_put(trace_hidden_offset, nullptr);
2505
2506 _head = new_head();
2507 _methods = new_methods();
2508 _bcis = new_bcis();
2509 _mirrors = new_mirrors();
2510 _names = new_names();
2511 _index = 0;
2512 }
2513
2514 oop backtrace() {
2515 return _backtrace();
2516 }
2517
2518 inline void push(Method* method, int bci, TRAPS) {
2519 // Smear the -1 bci to 0 since the array only holds unsigned
2520 // shorts. The later line number lookup would just smear the -1
2521 // to a 0 even if it could be recorded.
2522 if (bci == SynchronizationEntryBCI) bci = 0;
2523
2524 if (_index >= trace_chunk_size) {
2525 methodHandle mhandle(THREAD, method);
2526 expand(CHECK);
2527 method = mhandle();
2528 }
2529
2530 _methods->ushort_at_put(_index, method->orig_method_idnum());
2531 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2532
2533 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2534 // klass owning the symbols alive so their refcounts aren't decremented.
2535 Symbol* name = method->name();
2536 _names->symbol_at_put(_index, name);
2537
2538 // We need to save the mirrors in the backtrace to keep the class
2539 // from being unloaded while we still have this stack trace.
2540 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2541 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2542
2543 _index++;
2544 }
2545
2546 void set_has_hidden_top_frame() {
2547 if (!_has_hidden_top_frame) {
2548 // It would be nice to add java/lang/Boolean::TRUE here
2549 // to indicate that this backtrace has a hidden top frame.
2550 // But this code is used before TRUE is allocated.
2551 // Therefore let's just use an arbitrary legal oop
2552 // available right here. _methods is a short[].
2553 assert(_methods != nullptr, "we need a legal oop");
2554 _has_hidden_top_frame = true;
2555 _head->obj_at_put(trace_hidden_offset, _methods);
2556 }
2557 }
2558 };
2559
2560 struct BacktraceElement : public StackObj {
2561 int _method_id;
2562 int _bci;
2563 int _version;
2564 Symbol* _name;
2565 Handle _mirror;
2566 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2567 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2568 };
2569
2570 class BacktraceIterator : public StackObj {
2571 int _index;
2572 objArrayHandle _result;
2573 objArrayHandle _mirrors;
2574 typeArrayHandle _methods;
2575 typeArrayHandle _bcis;
2576 typeArrayHandle _names;
2577
2578 void init(objArrayHandle result, Thread* thread) {
2579 // Get method id, bci, version and mirror from chunk
2580 _result = result;
2581 if (_result.not_null()) {
2582 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2583 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2584 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2585 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2586 _index = 0;
2587 }
2588 }
2589 public:
2590 BacktraceIterator(objArrayHandle result, Thread* thread) {
2591 init(result, thread);
2592 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2593 }
2594
2595 BacktraceElement next(Thread* thread) {
2596 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2597 _methods->ushort_at(_index),
2598 Backtrace::version_at(_bcis->int_at(_index)),
2599 Backtrace::bci_at(_bcis->int_at(_index)),
2600 _names->symbol_at(_index));
2601 _index++;
2602
2603 if (_index >= java_lang_Throwable::trace_chunk_size) {
2604 int next_offset = java_lang_Throwable::trace_next_offset;
2605 // Get next chunk
2606 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2607 init(result, thread);
2608 }
2609 return e;
2610 }
2611
2612 bool repeat() {
2613 return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2614 }
2615 };
2616
2617
2618 // Print stack trace element to the specified output stream.
2619 // The output is formatted into a stringStream and written to the outputStream in one step.
2620 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2621 int version, int bci, Symbol* name) {
2622 ResourceMark rm;
2623 stringStream ss;
2624
2625 InstanceKlass* holder = java_lang_Class::as_InstanceKlass(mirror());
2626 const char* klass_name = holder->external_name();
2627 char* method_name = name->as_C_string();
2628 ss.print("\tat %s.%s(", klass_name, method_name);
2629
2630 // Print module information
2631 ModuleEntry* module = holder->module();
2632 if (module->is_named()) {
2633 char* module_name = module->name()->as_C_string();
2634 if (module->version() != nullptr) {
2635 char* module_version = module->version()->as_C_string();
2636 ss.print("%s@%s/", module_name, module_version);
2637 } else {
2638 ss.print("%s/", module_name);
2639 }
2640 }
2641
2642 char* source_file_name = nullptr;
2643 Symbol* source = Backtrace::get_source_file_name(holder, version);
2644 if (source != nullptr) {
2645 source_file_name = source->as_C_string();
2646 }
2647
2648 // The method can be null if the requested class version is gone
2649 Method* method = holder->method_with_orig_idnum(method_id, version);
2650 if (!version_matches(method, version)) {
2651 ss.print("Redefined)");
2652 } else {
2653 int line_number = Backtrace::get_line_number(method, bci);
2654 if (line_number == -2) {
2655 ss.print("Native Method)");
2656 } else {
2657 if (source_file_name != nullptr && (line_number != -1)) {
2658 // Sourcename and linenumber
2659 ss.print("%s:%d)", source_file_name, line_number);
2660 } else if (source_file_name != nullptr) {
2661 // Just sourcename
2662 ss.print("%s)", source_file_name);
2663 } else {
2664 // Neither sourcename nor linenumber
2665 ss.print("Unknown Source)");
2666 }
2667 nmethod* nm = method->code();
2668 if (WizardMode && nm != nullptr) {
2669 ss.print("(nmethod " INTPTR_FORMAT ")", p2i(nm));
2670 }
2671 }
2672 }
2673
2674 ss.cr();
2675 st->print_raw(ss.freeze(), ss.size());
2676 }
2677
2678 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2679 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2680 int method_id = method->orig_method_idnum();
2681 int version = method->constants()->version();
2682 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2683 }
2684
2685 /**
2686 * Print the throwable message and its stack trace plus all causes by walking the
2687 * cause chain. The output looks the same as of Throwable.printStackTrace().
2688 */
2689 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2690 // First, print the message.
2691 print(throwable(), st);
2692 st->cr();
2693
2694 // Now print the stack trace.
2695 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2696 while (throwable.not_null()) {
2697 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2698 if (result.is_null()) {
2699 st->print_raw_cr("\t<<no stack trace available>>");
2700 return;
2701 }
2702 BacktraceIterator iter(result, THREAD);
2703
2704 while (iter.repeat()) {
2705 BacktraceElement bte = iter.next(THREAD);
2706 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2707 }
2708 if (THREAD->can_call_java()) {
2709 // Call getCause() which doesn't necessarily return the _cause field.
2710 ExceptionMark em(THREAD);
2711 JavaValue cause(T_OBJECT);
2712 JavaCalls::call_virtual(&cause,
2713 throwable,
2714 throwable->klass(),
2715 vmSymbols::getCause_name(),
2716 vmSymbols::void_throwable_signature(),
2717 THREAD);
2718 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2719 if (HAS_PENDING_EXCEPTION) {
2720 CLEAR_PENDING_EXCEPTION;
2721 throwable = Handle();
2722 } else {
2723 throwable = Handle(THREAD, cause.get_oop());
2724 if (throwable.not_null()) {
2725 st->print("Caused by: ");
2726 print(throwable(), st);
2727 st->cr();
2728 }
2729 }
2730 } else {
2731 st->print_raw_cr("<<cannot call Java to get cause>>");
2732 return;
2733 }
2734 }
2735 }
2736
2737 /**
2738 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2739 */
2740 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2741 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2742 JavaValue result(T_VOID);
2743 JavaCalls::call_virtual(&result,
2744 throwable,
2745 vmClasses::Throwable_klass(),
2746 vmSymbols::printStackTrace_name(),
2747 vmSymbols::void_method_signature(),
2748 THREAD);
2749 }
2750
2751 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2752 if (!StackTraceInThrowable) return;
2753 ResourceMark rm(THREAD);
2754
2755 // Start out by clearing the backtrace for this object, in case the VM
2756 // runs out of memory while allocating the stack trace
2757 set_backtrace(throwable(), nullptr);
2758 // Clear lazily constructed Java level stacktrace if refilling occurs
2759 // This is unnecessary in 1.7+ but harmless
2760 clear_stacktrace(throwable());
2761
2762 int max_depth = MaxJavaStackTraceDepth;
2763 JavaThread* thread = THREAD;
2764
2765 BacktraceBuilder bt(CHECK);
2766
2767 // If there is no Java frame just return the method that was being called
2768 // with bci 0
2769 if (!thread->has_last_Java_frame()) {
2770 if (max_depth >= 1 && method() != nullptr) {
2771 bt.push(method(), 0, CHECK);
2772 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2773 set_depth(throwable(), 1);
2774 set_backtrace(throwable(), bt.backtrace());
2775 }
2776 return;
2777 }
2778
2779 // Instead of using vframe directly, this version of fill_in_stack_trace
2780 // basically handles everything by hand. This significantly improved the
2781 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2782 // See bug 6333838 for more details.
2783 // The "ASSERT" here is to verify this method generates the exactly same stack
2784 // trace as utilizing vframe.
2785 #ifdef ASSERT
2786 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2787 #endif
2788 int total_count = 0;
2789 RegisterMap map(thread,
2790 RegisterMap::UpdateMap::skip,
2791 RegisterMap::ProcessFrames::skip,
2792 RegisterMap::WalkContinuation::include);
2793 int decode_offset = 0;
2794 nmethod* nm = nullptr;
2795 bool skip_fillInStackTrace_check = false;
2796 bool skip_throwableInit_check = false;
2797 bool skip_hidden = !ShowHiddenFrames;
2798 bool show_carrier = ShowCarrierFrames;
2799 ContinuationEntry* cont_entry = thread->last_continuation();
2800 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2801 Method* method = nullptr;
2802 int bci = 0;
2803
2804 // Compiled java method case.
2805 if (decode_offset != 0) {
2806 DebugInfoReadStream stream(nm, decode_offset);
2807 decode_offset = stream.read_int();
2808 method = (Method*)nm->metadata_at(stream.read_int());
2809 bci = stream.read_bci();
2810 } else {
2811 if (fr.is_first_frame()) break;
2812
2813 if (Continuation::is_continuation_enterSpecial(fr)) {
2814 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2815 if (!show_carrier && cont_entry->is_virtual_thread()) {
2816 break;
2817 }
2818 cont_entry = cont_entry->parent();
2819 }
2820
2821 address pc = fr.pc();
2822 if (fr.is_interpreted_frame()) {
2823 address bcp;
2824 if (!map.in_cont()) {
2825 bcp = fr.interpreter_frame_bcp();
2826 method = fr.interpreter_frame_method();
2827 } else {
2828 bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2829 method = map.stack_chunk()->interpreter_frame_method(fr);
2830 }
2831 bci = method->bci_from(bcp);
2832 fr = fr.sender(&map);
2833 } else {
2834 CodeBlob* cb = fr.cb();
2835 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2836 // but non nmethod
2837 fr = fr.sender(&map);
2838 if (cb == nullptr || !cb->is_nmethod()) {
2839 continue;
2840 }
2841 nm = cb->as_nmethod();
2842 assert(nm->method() != nullptr, "must be");
2843 if (nm->method()->is_native()) {
2844 method = nm->method();
2845 bci = 0;
2846 } else {
2847 PcDesc* pd = nm->pc_desc_at(pc);
2848 decode_offset = pd->scope_decode_offset();
2849 // if decode_offset is not equal to 0, it will execute the
2850 // "compiled java method case" at the beginning of the loop.
2851 continue;
2852 }
2853 }
2854 }
2855 #ifdef ASSERT
2856 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2857 assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2858 st.next();
2859 }
2860 #endif
2861
2862 // the format of the stacktrace will be:
2863 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2864 // - 0 or more <init> methods for the exception class (skipped)
2865 // - rest of the stack
2866
2867 if (!skip_fillInStackTrace_check) {
2868 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2869 throwable->is_a(method->method_holder())) {
2870 continue;
2871 }
2872 else {
2873 skip_fillInStackTrace_check = true; // gone past them all
2874 }
2875 }
2876 if (!skip_throwableInit_check) {
2877 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2878
2879 // skip <init> methods of the exception class and superclasses
2880 // This is similar to classic VM.
2881 if (method->name() == vmSymbols::object_initializer_name() &&
2882 throwable->is_a(method->method_holder())) {
2883 continue;
2884 } else {
2885 // there are none or we've seen them all - either way stop checking
2886 skip_throwableInit_check = true;
2887 }
2888 }
2889 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2890 if (skip_hidden) {
2891 if (total_count == 0) {
2892 // The top frame will be hidden from the stack trace.
2893 bt.set_has_hidden_top_frame();
2894 }
2895 continue;
2896 }
2897 }
2898
2899 bt.push(method, bci, CHECK);
2900 total_count++;
2901 }
2902
2903 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2904
2905 // Put completed stack trace into throwable object
2906 set_backtrace(throwable(), bt.backtrace());
2907 set_depth(throwable(), total_count);
2908 }
2909
2910 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2911 // No-op if stack trace is disabled
2912 if (!StackTraceInThrowable) {
2913 return;
2914 }
2915
2916 // Disable stack traces for some preallocated out of memory errors
2917 if (!Universe::should_fill_in_stack_trace(throwable)) {
2918 return;
2919 }
2920
2921 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2922 PreserveExceptionMark pm(THREAD);
2923
2924 fill_in_stack_trace(throwable, method, THREAD);
2925 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2926 // original exception via the PreserveExceptionMark destructor.
2927 CLEAR_PENDING_EXCEPTION;
2928 }
2929
2930 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2931 // Allocate stack trace - backtrace is created but not filled in
2932
2933 // No-op if stack trace is disabled
2934 if (!StackTraceInThrowable) return;
2935 BacktraceBuilder bt(CHECK); // creates a backtrace
2936 set_backtrace(throwable(), bt.backtrace());
2937 }
2938
2939
2940 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2941 // Fill in stack trace into preallocated backtrace (no GC)
2942
2943 // No-op if stack trace is disabled
2944 if (!StackTraceInThrowable) return;
2945
2946 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2947
2948 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2949
2950 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2951 assert(backtrace.not_null(), "backtrace should have been preallocated");
2952
2953 ResourceMark rm(THREAD);
2954 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2955
2956 BacktraceBuilder bt(THREAD, backtrace);
2957
2958 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2959 // methods as preallocated errors aren't created by "java" code.
2960
2961 // fill in as much stack trace as possible
2962 int chunk_count = 0;
2963 for (;!st.at_end(); st.next()) {
2964 bt.push(st.method(), st.bci(), CHECK);
2965 chunk_count++;
2966
2967 // Bail-out for deep stacks
2968 if (chunk_count >= trace_chunk_size) break;
2969 }
2970 set_depth(throwable(), chunk_count);
2971 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2972
2973 // We support the Throwable immutability protocol defined for Java 7.
2974 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2975 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2976 }
2977
2978 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2979 objArrayHandle stack_trace_array_h, TRAPS) {
2980
2981 if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2982 THROW(vmSymbols::java_lang_NullPointerException());
2983 }
2984
2985 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2986
2987 if (stack_trace_array_h->length() != depth) {
2988 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2989 }
2990
2991 objArrayHandle result(THREAD, objArrayOop(backtrace()));
2992 BacktraceIterator iter(result, THREAD);
2993
2994 int index = 0;
2995 while (iter.repeat()) {
2996 BacktraceElement bte = iter.next(THREAD);
2997
2998 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2999
3000 if (stack_trace_element.is_null()) {
3001 THROW(vmSymbols::java_lang_NullPointerException());
3002 }
3003
3004 InstanceKlass* holder = java_lang_Class::as_InstanceKlass(bte._mirror());
3005 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
3006
3007 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
3008 method,
3009 bte._version,
3010 bte._bci,
3011 bte._name,
3012 CHECK);
3013 }
3014 }
3015
3016 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
3017 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
3018 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
3019 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
3020 // symbolic stacktrace of 'throwable'.
3021 assert(throwable.not_null(), "shouldn't be");
3022
3023 // Now create the message from the original exception and thread name.
3024 ResourceMark rm(current);
3025 const char *message = nullptr;
3026 oop detailed_message = java_lang_Throwable::message(throwable());
3027 if (detailed_message != nullptr) {
3028 message = java_lang_String::as_utf8_string(detailed_message);
3029 }
3030 stringStream st;
3031 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
3032 message == nullptr ? "" : ":");
3033 if (message == nullptr) {
3034 st.print("[in thread \"%s\"]", current->name());
3035 } else {
3036 st.print("%s [in thread \"%s\"]", message, current->name());
3037 }
3038
3039 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
3040 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
3041 // If new_exception returns a different exception while creating the exception,
3042 // abandon the attempt to save the initialization error and return null.
3043 if (init_error->klass()->name() != exception_name) {
3044 log_info(class, init)("Exception %s thrown while saving initialization exception",
3045 init_error->klass()->external_name());
3046 return Handle();
3047 }
3048
3049 // Call to java to fill in the stack trace and clear declaringClassObject to
3050 // not keep classes alive in the stack trace.
3051 // call this: public StackTraceElement[] getStackTrace()
3052 JavaValue result(T_ARRAY);
3053 JavaCalls::call_virtual(&result, throwable,
3054 vmClasses::Throwable_klass(),
3055 vmSymbols::getStackTrace_name(),
3056 vmSymbols::getStackTrace_signature(),
3057 current);
3058 if (!current->has_pending_exception()){
3059 Handle stack_trace(current, result.get_oop());
3060 assert(stack_trace->is_objArray(), "Should be an array");
3061 java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
3062 // Clear backtrace because the stacktrace should be used instead.
3063 set_backtrace(init_error(), nullptr);
3064 } else {
3065 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
3066 init_error->klass()->external_name());
3067 current->clear_pending_exception();
3068 }
3069
3070 return init_error;
3071 }
3072
3073 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
3074 JavaThread* current = JavaThread::current();
3075 objArrayHandle result(current, objArrayOop(backtrace(throwable)));
3076 BacktraceIterator iter(result, current);
3077 // No backtrace available.
3078 if (!iter.repeat()) return false;
3079
3080 // If the exception happened in a frame that has been hidden, i.e.,
3081 // omitted from the back trace, we can not compute the message.
3082 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
3083 if (hidden != nullptr) {
3084 return false;
3085 }
3086
3087 // Get first backtrace element.
3088 BacktraceElement bte = iter.next(current);
3089
3090 InstanceKlass* holder = java_lang_Class::as_InstanceKlass(bte._mirror());
3091 assert(holder != nullptr, "first element should be non-null");
3092 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
3093
3094 // Original version is no longer available.
3095 if (m == nullptr || !version_matches(m, bte._version)) {
3096 return false;
3097 }
3098
3099 *method = m;
3100 *bci = bte._bci;
3101 return true;
3102 }
3103
3104 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
3105 // Allocate java.lang.StackTraceElement instance
3106 InstanceKlass* k = vmClasses::StackTraceElement_klass();
3107 assert(k != nullptr, "must be loaded in 1.4+");
3108 if (k->should_be_initialized()) {
3109 k->initialize(CHECK_NULL);
3110 }
3111
3112 Handle element = k->allocate_instance_handle(CHECK_NULL);
3113
3114 int version = method->constants()->version();
3115 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
3116 return element();
3117 }
3118
3119 void java_lang_StackTraceElement::fill_in(Handle element,
3120 InstanceKlass* holder, const methodHandle& method,
3121 int version, int bci, Symbol* name, TRAPS) {
3122 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
3123
3124 ResourceMark rm(THREAD);
3125 HandleMark hm(THREAD);
3126
3127 // Fill in class name
3128 Handle java_class(THREAD, holder->java_mirror());
3129 oop classname = java_lang_Class::name(java_class, CHECK);
3130 java_lang_StackTraceElement::set_declaringClass(element(), classname);
3131 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
3132
3133 oop loader = holder->class_loader();
3134 if (loader != nullptr) {
3135 oop loader_name = java_lang_ClassLoader::name(loader);
3136 if (loader_name != nullptr)
3137 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
3138 }
3139
3140 // Fill in method name
3141 oop methodname = StringTable::intern(name, CHECK);
3142 java_lang_StackTraceElement::set_methodName(element(), methodname);
3143
3144 // Fill in module name and version
3145 ModuleEntry* module = holder->module();
3146 if (module->is_named()) {
3147 oop module_name = StringTable::intern(module->name(), CHECK);
3148 java_lang_StackTraceElement::set_moduleName(element(), module_name);
3149 oop module_version;
3150 if (module->version() != nullptr) {
3151 module_version = StringTable::intern(module->version(), CHECK);
3152 } else {
3153 module_version = nullptr;
3154 }
3155 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
3156 }
3157
3158 if (method() == nullptr || !version_matches(method(), version)) {
3159 // The method was redefined, accurate line number information isn't available
3160 java_lang_StackTraceElement::set_fileName(element(), nullptr);
3161 java_lang_StackTraceElement::set_lineNumber(element(), -1);
3162 } else {
3163 Symbol* source;
3164 oop source_file;
3165 int line_number;
3166 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
3167
3168 java_lang_StackTraceElement::set_fileName(element(), source_file);
3169 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
3170 }
3171 }
3172
3173 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
3174 InstanceKlass* holder,
3175 int version,
3176 const methodHandle& method,
3177 int bci,
3178 Symbol*& source,
3179 oop& source_file,
3180 int& line_number, TRAPS) {
3181 // Fill in source file name and line number.
3182 source = Backtrace::get_source_file_name(holder, version);
3183 source_file = java_lang_Class::source_file(java_class());
3184 if (source != nullptr) {
3185 // Class was not redefined. We can trust its cache if set,
3186 // else we have to initialize it.
3187 if (source_file == nullptr) {
3188 source_file = StringTable::intern(source, CHECK);
3189 java_lang_Class::set_source_file(java_class(), source_file);
3190 }
3191 } else {
3192 // Class was redefined. Dump the cache if it was set.
3193 if (source_file != nullptr) {
3194 source_file = nullptr;
3195 java_lang_Class::set_source_file(java_class(), source_file);
3196 }
3197 }
3198 line_number = Backtrace::get_line_number(method(), bci);
3199 }
3200
3201 #if INCLUDE_JVMCI
3202 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
3203 Symbol*& filename, int& line_number, TRAPS) {
3204 ResourceMark rm(THREAD);
3205 HandleMark hm(THREAD);
3206
3207 filename = nullptr;
3208 line_number = -1;
3209
3210 oop source_file;
3211 int version = method->constants()->version();
3212 InstanceKlass* holder = method->method_holder();
3213 Handle java_class(THREAD, holder->java_mirror());
3214 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
3215 }
3216 #endif // INCLUDE_JVMCI
3217
3218 // java_lang_ClassFrameInfo
3219
3220 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
3221 int java_lang_ClassFrameInfo::_flags_offset;
3222
3223 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
3224 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \
3225 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false)
3226
3227 void java_lang_ClassFrameInfo::compute_offsets() {
3228 InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
3229 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3230 }
3231
3232 #if INCLUDE_CDS
3233 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
3234 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3235 }
3236 #endif
3237
3238 static int get_flags(const methodHandle& m) {
3239 int flags = m->access_flags().as_method_flags();
3240 if (m->is_object_initializer()) {
3241 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR;
3242 } else {
3243 // Note: Static initializers can be here. Record them as plain methods.
3244 flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
3245 }
3246 if (m->caller_sensitive()) {
3247 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
3248 }
3249 if (m->is_hidden()) {
3250 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3251 }
3252 assert((flags & 0xFF000000) == 0, "unexpected flags");
3253 return flags;
3254 }
3255
3256 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3257 return obj->obj_field(_classOrMemberName_offset);
3258 }
3259
3260 int java_lang_ClassFrameInfo::flags(oop obj) {
3261 return obj->int_field(_flags_offset);
3262 }
3263
3264 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3265 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3266 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3267 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3268 stackFrame->int_field_put(_flags_offset, flags);
3269 }
3270
3271 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3272 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3273 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3274 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3275 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3276 stackFrame->int_field_put(_flags_offset, flags);
3277 }
3278
3279
3280 // java_lang_StackFrameInfo
3281
3282 int java_lang_StackFrameInfo::_type_offset;
3283 int java_lang_StackFrameInfo::_name_offset;
3284 int java_lang_StackFrameInfo::_bci_offset;
3285 int java_lang_StackFrameInfo::_version_offset;
3286 int java_lang_StackFrameInfo::_contScope_offset;
3287
3288 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3289 macro(_type_offset, k, "type", object_signature, false); \
3290 macro(_name_offset, k, "name", string_signature, false); \
3291 macro(_bci_offset, k, "bci", int_signature, false); \
3292 macro(_contScope_offset, k, "contScope", continuationscope_signature, false)
3293
3294 void java_lang_StackFrameInfo::compute_offsets() {
3295 InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3296 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3297 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3298 }
3299
3300 #if INCLUDE_CDS
3301 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3302 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3303 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3304 }
3305 #endif
3306
3307 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3308 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3309 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3310 return method;
3311 }
3312
3313 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3314 // set Method* or mid/cpref
3315 HandleMark hm(THREAD);
3316 Handle cont_h(THREAD, cont);
3317 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3318
3319 // set bci
3320 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3321 // method may be redefined; store the version
3322 int version = method->constants()->version();
3323 assert((jushort)version == version, "version should be short");
3324 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3325
3326 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3327 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3328 }
3329
3330 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3331 ResourceMark rm(THREAD);
3332 HandleMark hm(THREAD);
3333
3334 Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3335 InstanceKlass* holder = method->method_holder();
3336 short version = stackFrame->short_field(_version_offset);
3337 int bci = stackFrame->int_field(_bci_offset);
3338 Symbol* name = method->name();
3339 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3340 }
3341
3342 oop java_lang_StackFrameInfo::type(oop obj) {
3343 return obj->obj_field(_type_offset);
3344 }
3345
3346 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3347 obj->obj_field_put(_type_offset, value);
3348 }
3349
3350 oop java_lang_StackFrameInfo::name(oop obj) {
3351 return obj->obj_field(_name_offset);
3352 }
3353
3354 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3355 obj->obj_field_put(_name_offset, value);
3356 }
3357
3358 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3359 obj->short_field_put(_version_offset, value);
3360 }
3361
3362 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3363 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3364 obj->int_field_put(_bci_offset, value);
3365 }
3366
3367 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3368 obj->obj_field_put(_contScope_offset, value);
3369 }
3370
3371 int java_lang_LiveStackFrameInfo::_monitors_offset;
3372 int java_lang_LiveStackFrameInfo::_locals_offset;
3373 int java_lang_LiveStackFrameInfo::_operands_offset;
3374 int java_lang_LiveStackFrameInfo::_mode_offset;
3375
3376 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3377 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
3378 macro(_locals_offset, k, "locals", object_array_signature, false); \
3379 macro(_operands_offset, k, "operands", object_array_signature, false); \
3380 macro(_mode_offset, k, "mode", int_signature, false)
3381
3382 void java_lang_LiveStackFrameInfo::compute_offsets() {
3383 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3384 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3385 }
3386
3387 #if INCLUDE_CDS
3388 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3389 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3390 }
3391 #endif
3392
3393 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3394 obj->obj_field_put(_monitors_offset, value);
3395 }
3396
3397 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3398 obj->obj_field_put(_locals_offset, value);
3399 }
3400
3401 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3402 obj->obj_field_put(_operands_offset, value);
3403 }
3404
3405 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3406 obj->int_field_put(_mode_offset, value);
3407 }
3408
3409
3410 // java_lang_AccessibleObject
3411
3412 int java_lang_reflect_AccessibleObject::_override_offset;
3413
3414 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3415 macro(_override_offset, k, "override", bool_signature, false)
3416
3417 void java_lang_reflect_AccessibleObject::compute_offsets() {
3418 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3419 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3420 }
3421
3422 #if INCLUDE_CDS
3423 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3424 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3425 }
3426 #endif
3427
3428 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3429 return (jboolean) reflect->bool_field(_override_offset);
3430 }
3431
3432 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3433 reflect->bool_field_put(_override_offset, (int) value);
3434 }
3435
3436 // java_lang_reflect_Method
3437
3438 int java_lang_reflect_Method::_clazz_offset;
3439 int java_lang_reflect_Method::_name_offset;
3440 int java_lang_reflect_Method::_returnType_offset;
3441 int java_lang_reflect_Method::_parameterTypes_offset;
3442 int java_lang_reflect_Method::_exceptionTypes_offset;
3443 int java_lang_reflect_Method::_slot_offset;
3444 int java_lang_reflect_Method::_modifiers_offset;
3445 int java_lang_reflect_Method::_signature_offset;
3446 int java_lang_reflect_Method::_annotations_offset;
3447 int java_lang_reflect_Method::_parameter_annotations_offset;
3448 int java_lang_reflect_Method::_annotation_default_offset;
3449
3450 #define METHOD_FIELDS_DO(macro) \
3451 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3452 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3453 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
3454 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3455 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3456 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3457 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3458 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3459 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3460 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3461 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
3462
3463 void java_lang_reflect_Method::compute_offsets() {
3464 InstanceKlass* k = vmClasses::reflect_Method_klass();
3465 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3466 }
3467
3468 #if INCLUDE_CDS
3469 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3470 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3471 }
3472 #endif
3473
3474 Handle java_lang_reflect_Method::create(TRAPS) {
3475 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3476 InstanceKlass* klass = vmClasses::reflect_Method_klass();
3477 // This class is eagerly initialized during VM initialization, since we keep a reference
3478 // to one of the methods
3479 assert(klass->is_initialized(), "must be initialized");
3480 return klass->allocate_instance_handle(THREAD);
3481 }
3482
3483 oop java_lang_reflect_Method::clazz(oop reflect) {
3484 return reflect->obj_field(_clazz_offset);
3485 }
3486
3487 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3488 reflect->obj_field_put(_clazz_offset, value);
3489 }
3490
3491 int java_lang_reflect_Method::slot(oop reflect) {
3492 return reflect->int_field(_slot_offset);
3493 }
3494
3495 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3496 reflect->int_field_put(_slot_offset, value);
3497 }
3498
3499 void java_lang_reflect_Method::set_name(oop method, oop value) {
3500 method->obj_field_put(_name_offset, value);
3501 }
3502
3503 oop java_lang_reflect_Method::return_type(oop method) {
3504 return method->obj_field(_returnType_offset);
3505 }
3506
3507 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3508 method->obj_field_put(_returnType_offset, value);
3509 }
3510
3511 oop java_lang_reflect_Method::parameter_types(oop method) {
3512 return method->obj_field(_parameterTypes_offset);
3513 }
3514
3515 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3516 method->obj_field_put(_parameterTypes_offset, value);
3517 }
3518
3519 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3520 method->obj_field_put(_exceptionTypes_offset, value);
3521 }
3522
3523 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3524 method->int_field_put(_modifiers_offset, value);
3525 }
3526
3527 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3528 method->obj_field_put(_signature_offset, value);
3529 }
3530
3531 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3532 method->obj_field_put(_annotations_offset, value);
3533 }
3534
3535 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3536 method->obj_field_put(_parameter_annotations_offset, value);
3537 }
3538
3539 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3540 method->obj_field_put(_annotation_default_offset, value);
3541 }
3542
3543 int java_lang_reflect_Constructor::_clazz_offset;
3544 int java_lang_reflect_Constructor::_parameterTypes_offset;
3545 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3546 int java_lang_reflect_Constructor::_slot_offset;
3547 int java_lang_reflect_Constructor::_modifiers_offset;
3548 int java_lang_reflect_Constructor::_signature_offset;
3549 int java_lang_reflect_Constructor::_annotations_offset;
3550 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3551
3552 #define CONSTRUCTOR_FIELDS_DO(macro) \
3553 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3554 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3555 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3556 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3557 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3558 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3559 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3560 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3561
3562 void java_lang_reflect_Constructor::compute_offsets() {
3563 InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3564 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3565 }
3566
3567 #if INCLUDE_CDS
3568 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3569 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3570 }
3571 #endif
3572
3573 Handle java_lang_reflect_Constructor::create(TRAPS) {
3574 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3575 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3576 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3577 InstanceKlass* ik = InstanceKlass::cast(k);
3578 // Ensure it is initialized
3579 ik->initialize(CHECK_NH);
3580 return ik->allocate_instance_handle(THREAD);
3581 }
3582
3583 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3584 return reflect->obj_field(_clazz_offset);
3585 }
3586
3587 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3588 reflect->obj_field_put(_clazz_offset, value);
3589 }
3590
3591 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3592 return constructor->obj_field(_parameterTypes_offset);
3593 }
3594
3595 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3596 constructor->obj_field_put(_parameterTypes_offset, value);
3597 }
3598
3599 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3600 constructor->obj_field_put(_exceptionTypes_offset, value);
3601 }
3602
3603 int java_lang_reflect_Constructor::slot(oop reflect) {
3604 return reflect->int_field(_slot_offset);
3605 }
3606
3607 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3608 reflect->int_field_put(_slot_offset, value);
3609 }
3610
3611 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3612 constructor->int_field_put(_modifiers_offset, value);
3613 }
3614
3615 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3616 constructor->obj_field_put(_signature_offset, value);
3617 }
3618
3619 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3620 constructor->obj_field_put(_annotations_offset, value);
3621 }
3622
3623 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3624 method->obj_field_put(_parameter_annotations_offset, value);
3625 }
3626
3627 int java_lang_reflect_Field::_clazz_offset;
3628 int java_lang_reflect_Field::_name_offset;
3629 int java_lang_reflect_Field::_type_offset;
3630 int java_lang_reflect_Field::_slot_offset;
3631 int java_lang_reflect_Field::_modifiers_offset;
3632 int java_lang_reflect_Field::_trusted_final_offset;
3633 int java_lang_reflect_Field::_signature_offset;
3634 int java_lang_reflect_Field::_annotations_offset;
3635
3636 #define FIELD_FIELDS_DO(macro) \
3637 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3638 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3639 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \
3640 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3641 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3642 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \
3643 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3644 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3645
3646 void java_lang_reflect_Field::compute_offsets() {
3647 InstanceKlass* k = vmClasses::reflect_Field_klass();
3648 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3649 }
3650
3651 #if INCLUDE_CDS
3652 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3653 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3654 }
3655 #endif
3656
3657 Handle java_lang_reflect_Field::create(TRAPS) {
3658 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3659 Symbol* name = vmSymbols::java_lang_reflect_Field();
3660 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3661 InstanceKlass* ik = InstanceKlass::cast(k);
3662 // Ensure it is initialized
3663 ik->initialize(CHECK_NH);
3664 return ik->allocate_instance_handle(THREAD);
3665 }
3666
3667 oop java_lang_reflect_Field::clazz(oop reflect) {
3668 return reflect->obj_field(_clazz_offset);
3669 }
3670
3671 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3672 reflect->obj_field_put(_clazz_offset, value);
3673 }
3674
3675 oop java_lang_reflect_Field::name(oop field) {
3676 return field->obj_field(_name_offset);
3677 }
3678
3679 void java_lang_reflect_Field::set_name(oop field, oop value) {
3680 field->obj_field_put(_name_offset, value);
3681 }
3682
3683 oop java_lang_reflect_Field::type(oop field) {
3684 return field->obj_field(_type_offset);
3685 }
3686
3687 void java_lang_reflect_Field::set_type(oop field, oop value) {
3688 field->obj_field_put(_type_offset, value);
3689 }
3690
3691 int java_lang_reflect_Field::slot(oop reflect) {
3692 return reflect->int_field(_slot_offset);
3693 }
3694
3695 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3696 reflect->int_field_put(_slot_offset, value);
3697 }
3698
3699 int java_lang_reflect_Field::modifiers(oop field) {
3700 return field->int_field(_modifiers_offset);
3701 }
3702
3703 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3704 field->int_field_put(_modifiers_offset, value);
3705 }
3706
3707 void java_lang_reflect_Field::set_trusted_final(oop field) {
3708 field->bool_field_put(_trusted_final_offset, true);
3709 }
3710
3711 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3712 field->obj_field_put(_signature_offset, value);
3713 }
3714
3715 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3716 field->obj_field_put(_annotations_offset, value);
3717 }
3718
3719 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3720 // Allocate java.lang.reflect.RecordComponent instance
3721 HandleMark hm(THREAD);
3722 InstanceKlass* ik = vmClasses::RecordComponent_klass();
3723 assert(ik != nullptr, "must be loaded");
3724 ik->initialize(CHECK_NULL);
3725
3726 Handle element = ik->allocate_instance_handle(CHECK_NULL);
3727
3728 Handle decl_class(THREAD, holder->java_mirror());
3729 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3730
3731 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3732 oop component_name = StringTable::intern(name, CHECK_NULL);
3733 java_lang_reflect_RecordComponent::set_name(element(), component_name);
3734
3735 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3736 Handle component_type_h =
3737 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3738 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3739
3740 Method* accessor_method = nullptr;
3741 {
3742 // Prepend "()" to type to create the full method signature.
3743 ResourceMark rm(THREAD);
3744 int sig_len = type->utf8_length() + 3; // "()" and null char
3745 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3746 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3747 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3748 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3749 }
3750
3751 if (accessor_method != nullptr) {
3752 methodHandle method(THREAD, accessor_method);
3753 oop m = Reflection::new_method(method, false, CHECK_NULL);
3754 java_lang_reflect_RecordComponent::set_accessor(element(), m);
3755 } else {
3756 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3757 }
3758
3759 int sig_index = component->generic_signature_index();
3760 if (sig_index > 0) {
3761 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3762 oop component_sig = StringTable::intern(sig, CHECK_NULL);
3763 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3764 } else {
3765 java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3766 }
3767
3768 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3769 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3770
3771 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3772 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3773
3774 return element();
3775 }
3776
3777 int reflect_ConstantPool::_vmholder_offset;
3778
3779 void reflect_ConstantPool::compute_offsets() {
3780 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3781 // The field is injected and called Object vmholder in the jdk.internal.reflect.ConstantPool class.
3782 CONSTANTPOOL_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3783 }
3784
3785 #if INCLUDE_CDS
3786 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3787 CONSTANTPOOL_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3788 }
3789 #endif
3790
3791 int java_lang_reflect_Parameter::_name_offset;
3792 int java_lang_reflect_Parameter::_modifiers_offset;
3793 int java_lang_reflect_Parameter::_index_offset;
3794 int java_lang_reflect_Parameter::_executable_offset;
3795
3796 #define PARAMETER_FIELDS_DO(macro) \
3797 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3798 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3799 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \
3800 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3801
3802 void java_lang_reflect_Parameter::compute_offsets() {
3803 InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3804 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3805 }
3806
3807 #if INCLUDE_CDS
3808 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3809 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3810 }
3811 #endif
3812
3813 Handle java_lang_reflect_Parameter::create(TRAPS) {
3814 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3815 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3816 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3817 InstanceKlass* ik = InstanceKlass::cast(k);
3818 // Ensure it is initialized
3819 ik->initialize(CHECK_NH);
3820 return ik->allocate_instance_handle(THREAD);
3821 }
3822
3823 oop java_lang_reflect_Parameter::name(oop param) {
3824 return param->obj_field(_name_offset);
3825 }
3826
3827 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3828 param->obj_field_put(_name_offset, value);
3829 }
3830
3831 int java_lang_reflect_Parameter::modifiers(oop param) {
3832 return param->int_field(_modifiers_offset);
3833 }
3834
3835 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3836 param->int_field_put(_modifiers_offset, value);
3837 }
3838
3839 int java_lang_reflect_Parameter::index(oop param) {
3840 return param->int_field(_index_offset);
3841 }
3842
3843 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3844 param->int_field_put(_index_offset, value);
3845 }
3846
3847 oop java_lang_reflect_Parameter::executable(oop param) {
3848 return param->obj_field(_executable_offset);
3849 }
3850
3851 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3852 param->obj_field_put(_executable_offset, value);
3853 }
3854
3855 // java_lang_Module
3856
3857 int java_lang_Module::_loader_offset;
3858 int java_lang_Module::_name_offset;
3859 int java_lang_Module::_module_entry_offset;
3860
3861 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3862 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3863 return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3864 vmSymbols::java_lang_module_init_signature(),
3865 loader, module_name, CHECK_NH);
3866 }
3867
3868 #define MODULE_FIELDS_DO(macro) \
3869 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3870 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false)
3871
3872 void java_lang_Module::compute_offsets() {
3873 InstanceKlass* k = vmClasses::Module_klass();
3874 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3875 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3876 }
3877
3878 #if INCLUDE_CDS
3879 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3880 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3881 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3882 }
3883 #endif
3884
3885 oop java_lang_Module::loader(oop module) {
3886 return module->obj_field(_loader_offset);
3887 }
3888
3889 void java_lang_Module::set_loader(oop module, oop value) {
3890 module->obj_field_put(_loader_offset, value);
3891 }
3892
3893 oop java_lang_Module::name(oop module) {
3894 return module->obj_field(_name_offset);
3895 }
3896
3897 void java_lang_Module::set_name(oop module, oop value) {
3898 module->obj_field_put(_name_offset, value);
3899 }
3900
3901 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3902 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3903 assert(module != nullptr, "module can't be null");
3904 assert(oopDesc::is_oop(module), "module must be oop");
3905
3906 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3907 return module_entry;
3908 }
3909
3910 ModuleEntry* java_lang_Module::module_entry(oop module) {
3911 ModuleEntry* module_entry = module_entry_raw(module);
3912 if (module_entry == nullptr) {
3913 // If the inject field containing the ModuleEntry* is null then return the
3914 // class loader's unnamed module.
3915 oop loader = java_lang_Module::loader(module);
3916 Handle h_loader = Handle(Thread::current(), loader);
3917 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3918 return loader_cld->unnamed_module();
3919 }
3920 return module_entry;
3921 }
3922
3923 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3924 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3925 assert(module != nullptr, "module can't be null");
3926 assert(oopDesc::is_oop(module), "module must be oop");
3927 module->address_field_put(_module_entry_offset, (address)module_entry);
3928 }
3929
3930 Handle reflect_ConstantPool::create(TRAPS) {
3931 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3932 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3933 // Ensure it is initialized
3934 k->initialize(CHECK_NH);
3935 return k->allocate_instance_handle(THREAD);
3936 }
3937
3938
3939 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3940 assert(_vmholder_offset != 0, "Uninitialized vmholder");
3941 oop mirror = value->pool_holder()->java_mirror();
3942 // Save the mirror to get back the constant pool.
3943 reflect->obj_field_put(_vmholder_offset, mirror);
3944 }
3945
3946 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3947 assert(_vmholder_offset != 0, "Uninitialized vmholder");
3948 oop mirror = reflect->obj_field(_vmholder_offset);
3949 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(mirror);
3950
3951 // Get the constant pool back from the klass. Since class redefinition
3952 // merges the new constant pool into the old, this is essentially the
3953 // same constant pool as the original. If constant pool merging is
3954 // no longer done in the future, this will have to change to save
3955 // the original.
3956 return ik->constants();
3957 }
3958
3959
3960 // Support for java_lang_ref_Reference
3961
3962 bool java_lang_ref_Reference::_offsets_initialized;
3963
3964 int java_lang_ref_Reference::_referent_offset;
3965 int java_lang_ref_Reference::_queue_offset;
3966 int java_lang_ref_Reference::_next_offset;
3967 int java_lang_ref_Reference::_discovered_offset;
3968
3969 #define REFERENCE_FIELDS_DO(macro) \
3970 macro(_referent_offset, k, "referent", object_signature, false); \
3971 macro(_queue_offset, k, "queue", referencequeue_signature, false); \
3972 macro(_next_offset, k, "next", reference_signature, false); \
3973 macro(_discovered_offset, k, "discovered", reference_signature, false);
3974
3975 void java_lang_ref_Reference::compute_offsets() {
3976 if (_offsets_initialized) {
3977 return;
3978 }
3979 _offsets_initialized = true;
3980 InstanceKlass* k = vmClasses::Reference_klass();
3981 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3982 }
3983
3984 #if INCLUDE_CDS
3985 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3986 f->do_bool(&_offsets_initialized);
3987 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3988 }
3989 #endif
3990
3991 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3992 assert(obj != nullptr, "sanity");
3993 if (offset != _referent_offset) {
3994 return false;
3995 }
3996
3997 Klass* k = obj->klass();
3998 if (!k->is_instance_klass()) {
3999 return false;
4000 }
4001
4002 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
4003 bool is_reference = ik->reference_type() != REF_NONE;
4004 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
4005 return is_reference;
4006 }
4007
4008 int java_lang_boxing_object::_value_offset;
4009 int java_lang_boxing_object::_long_value_offset;
4010
4011 #define BOXING_FIELDS_DO(macro) \
4012 macro(_value_offset, integerKlass, "value", int_signature, false); \
4013 macro(_long_value_offset, longKlass, "value", long_signature, false);
4014
4015 void java_lang_boxing_object::compute_offsets() {
4016 InstanceKlass* integerKlass = vmClasses::Integer_klass();
4017 InstanceKlass* longKlass = vmClasses::Long_klass();
4018 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4019 }
4020
4021 #if INCLUDE_CDS
4022 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
4023 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4024 }
4025 #endif
4026
4027 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
4028 Klass* k = vmClasses::box_klass(type);
4029 if (k == nullptr) return nullptr;
4030 InstanceKlass* ik = InstanceKlass::cast(k);
4031 if (!ik->is_initialized()) {
4032 ik->initialize(CHECK_NULL);
4033 }
4034 return ik->allocate_instance(THREAD);
4035 }
4036
4037
4038 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
4039 oop box = initialize_and_allocate(type, CHECK_NULL);
4040 if (box == nullptr) return nullptr;
4041 switch (type) {
4042 case T_BOOLEAN:
4043 box->bool_field_put(_value_offset, value->z);
4044 break;
4045 case T_CHAR:
4046 box->char_field_put(_value_offset, value->c);
4047 break;
4048 case T_FLOAT:
4049 box->float_field_put(_value_offset, value->f);
4050 break;
4051 case T_DOUBLE:
4052 box->double_field_put(_long_value_offset, value->d);
4053 break;
4054 case T_BYTE:
4055 box->byte_field_put(_value_offset, value->b);
4056 break;
4057 case T_SHORT:
4058 box->short_field_put(_value_offset, value->s);
4059 break;
4060 case T_INT:
4061 box->int_field_put(_value_offset, value->i);
4062 break;
4063 case T_LONG:
4064 box->long_field_put(_long_value_offset, value->j);
4065 break;
4066 default:
4067 return nullptr;
4068 }
4069 return box;
4070 }
4071
4072
4073 BasicType java_lang_boxing_object::basic_type(oop box) {
4074 if (box == nullptr) return T_ILLEGAL;
4075 BasicType type = vmClasses::box_klass_type(box->klass());
4076 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
4077 return T_ILLEGAL;
4078 return type;
4079 }
4080
4081
4082 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
4083 BasicType type = vmClasses::box_klass_type(box->klass());
4084 switch (type) {
4085 case T_BOOLEAN:
4086 value->z = box->bool_field(_value_offset);
4087 break;
4088 case T_CHAR:
4089 value->c = box->char_field(_value_offset);
4090 break;
4091 case T_FLOAT:
4092 value->f = box->float_field(_value_offset);
4093 break;
4094 case T_DOUBLE:
4095 value->d = box->double_field(_long_value_offset);
4096 break;
4097 case T_BYTE:
4098 value->b = box->byte_field(_value_offset);
4099 break;
4100 case T_SHORT:
4101 value->s = box->short_field(_value_offset);
4102 break;
4103 case T_INT:
4104 value->i = box->int_field(_value_offset);
4105 break;
4106 case T_LONG:
4107 value->j = box->long_field(_long_value_offset);
4108 break;
4109 default:
4110 return T_ILLEGAL;
4111 } // end switch
4112 return type;
4113 }
4114
4115
4116 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
4117 BasicType type = vmClasses::box_klass_type(box->klass());
4118 switch (type) {
4119 case T_BOOLEAN:
4120 box->bool_field_put(_value_offset, value->z);
4121 break;
4122 case T_CHAR:
4123 box->char_field_put(_value_offset, value->c);
4124 break;
4125 case T_FLOAT:
4126 box->float_field_put(_value_offset, value->f);
4127 break;
4128 case T_DOUBLE:
4129 box->double_field_put(_long_value_offset, value->d);
4130 break;
4131 case T_BYTE:
4132 box->byte_field_put(_value_offset, value->b);
4133 break;
4134 case T_SHORT:
4135 box->short_field_put(_value_offset, value->s);
4136 break;
4137 case T_INT:
4138 box->int_field_put(_value_offset, value->i);
4139 break;
4140 case T_LONG:
4141 box->long_field_put(_long_value_offset, value->j);
4142 break;
4143 default:
4144 return T_ILLEGAL;
4145 } // end switch
4146 return type;
4147 }
4148
4149
4150 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
4151 switch (type) {
4152 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
4153 case T_CHAR: st->print("%d", value->c); break;
4154 case T_BYTE: st->print("%d", value->b); break;
4155 case T_SHORT: st->print("%d", value->s); break;
4156 case T_INT: st->print("%d", value->i); break;
4157 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
4158 case T_FLOAT: st->print("%f", value->f); break;
4159 case T_DOUBLE: st->print("%lf", value->d); break;
4160 default: st->print("type %d?", type); break;
4161 }
4162 }
4163
4164
4165 // Support for java_lang_ref_SoftReference
4166 //
4167
4168 int java_lang_ref_SoftReference::_timestamp_offset;
4169 int java_lang_ref_SoftReference::_static_clock_offset;
4170
4171 #define SOFTREFERENCE_FIELDS_DO(macro) \
4172 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
4173 macro(_static_clock_offset, k, "clock", long_signature, true)
4174
4175 void java_lang_ref_SoftReference::compute_offsets() {
4176 InstanceKlass* k = vmClasses::SoftReference_klass();
4177 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4178 }
4179
4180 #if INCLUDE_CDS
4181 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
4182 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4183 }
4184 #endif
4185
4186 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
4187 return ref->long_field(_timestamp_offset);
4188 }
4189
4190 jlong java_lang_ref_SoftReference::clock() {
4191 InstanceKlass* ik = vmClasses::SoftReference_klass();
4192 oop base = ik->static_field_base_raw();
4193 return base->long_field(_static_clock_offset);
4194 }
4195
4196 void java_lang_ref_SoftReference::set_clock(jlong value) {
4197 InstanceKlass* ik = vmClasses::SoftReference_klass();
4198 oop base = ik->static_field_base_raw();
4199 base->long_field_put(_static_clock_offset, value);
4200 }
4201
4202 // Support for java_lang_invoke_DirectMethodHandle
4203
4204 int java_lang_invoke_DirectMethodHandle::_member_offset;
4205
4206 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
4207 oop member_name = nullptr;
4208 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
4209 "a DirectMethodHandle oop is expected");
4210 return dmh->obj_field(_member_offset);
4211 }
4212
4213 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
4214 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
4215
4216 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
4217 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
4218 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4219 }
4220
4221 #if INCLUDE_CDS
4222 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
4223 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4224 }
4225 #endif
4226
4227 // Support for java_lang_invoke_MethodHandle
4228
4229 int java_lang_invoke_MethodHandle::_type_offset;
4230 int java_lang_invoke_MethodHandle::_form_offset;
4231
4232 int java_lang_invoke_MemberName::_clazz_offset;
4233 int java_lang_invoke_MemberName::_name_offset;
4234 int java_lang_invoke_MemberName::_type_offset;
4235 int java_lang_invoke_MemberName::_flags_offset;
4236 int java_lang_invoke_MemberName::_method_offset;
4237 int java_lang_invoke_MemberName::_vmindex_offset;
4238
4239 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
4240 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
4241
4242 int java_lang_invoke_LambdaForm::_vmentry_offset;
4243
4244 #define METHODHANDLE_FIELDS_DO(macro) \
4245 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4246 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
4247
4248 void java_lang_invoke_MethodHandle::compute_offsets() {
4249 InstanceKlass* k = vmClasses::MethodHandle_klass();
4250 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4251 }
4252
4253 #if INCLUDE_CDS
4254 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4255 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4256 }
4257 #endif
4258
4259 #define MEMBERNAME_FIELDS_DO(macro) \
4260 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4261 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4262 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
4263 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
4264 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
4265
4266 void java_lang_invoke_MemberName::compute_offsets() {
4267 InstanceKlass* k = vmClasses::MemberName_klass();
4268 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4269 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4270 }
4271
4272 #if INCLUDE_CDS
4273 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4274 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4275 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4276 }
4277 #endif
4278
4279 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4280 macro(_vmholder_offset, k, "vmholder", class_signature, false)
4281
4282 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4283 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4284 assert(k != nullptr, "jdk mismatch");
4285 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4286 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4287 }
4288
4289 #if INCLUDE_CDS
4290 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4291 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4292 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4293 }
4294 #endif
4295
4296 #define LAMBDAFORM_FIELDS_DO(macro) \
4297 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4298
4299 void java_lang_invoke_LambdaForm::compute_offsets() {
4300 InstanceKlass* k = vmClasses::LambdaForm_klass();
4301 assert (k != nullptr, "jdk mismatch");
4302 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4303 }
4304
4305 #if INCLUDE_CDS
4306 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4307 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4308 }
4309 #endif
4310
4311 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4312 return obj != nullptr && is_subclass(obj->klass());
4313 }
4314
4315 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4316 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4317
4318 #define NEP_FIELDS_DO(macro) \
4319 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
4320 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4321
4322 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4323 return obj != nullptr && is_subclass(obj->klass());
4324 }
4325
4326 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4327 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4328 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4329 }
4330
4331 #if INCLUDE_CDS
4332 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4333 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4334 }
4335 #endif
4336
4337 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4338 return entry->obj_field(_method_type_offset);
4339 }
4340
4341 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4342 return entry->long_field(_downcall_stub_address_offset);
4343 }
4344
4345 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4346 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4347 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4348 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4349 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4350 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4351 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4352
4353 #define ABIDescriptor_FIELDS_DO(macro) \
4354 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4355 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4356 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4357 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4358 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4359 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4360 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4361
4362 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4363 return obj != nullptr && is_subclass(obj->klass());
4364 }
4365
4366 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4367 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4368 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4369 }
4370
4371 #if INCLUDE_CDS
4372 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4373 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4374 }
4375 #endif
4376
4377 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4378 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4379 }
4380
4381 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4382 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4383 }
4384
4385 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4386 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4387 }
4388
4389 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4390 return entry->int_field(_stackAlignment_offset);
4391 }
4392
4393 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4394 return entry->int_field(_shadowSpace_offset);
4395 }
4396
4397 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4398 return entry->obj_field(_scratch1_offset);
4399 }
4400
4401 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4402 return entry->obj_field(_scratch2_offset);
4403 }
4404
4405 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4406 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4407 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4408 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4409
4410 #define VMStorage_FIELDS_DO(macro) \
4411 macro(_type_offset, k, "type", byte_signature, false); \
4412 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4413 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4414 macro(_debugName_offset, k, "debugName", string_signature, false); \
4415
4416 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4417 return obj != nullptr && is_subclass(obj->klass());
4418 }
4419
4420 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4421 InstanceKlass* k = vmClasses::VMStorage_klass();
4422 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4423 }
4424
4425 #if INCLUDE_CDS
4426 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4427 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4428 }
4429 #endif
4430
4431 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4432 return entry->byte_field(_type_offset);
4433 }
4434
4435 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4436 return entry->int_field(_indexOrOffset_offset);
4437 }
4438
4439 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4440 return entry->short_field(_segmentMaskOrSize_offset);
4441 }
4442
4443 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4444 return entry->obj_field(_debugName_offset);
4445 }
4446
4447 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4448 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4449
4450 #define CallConv_FIELDS_DO(macro) \
4451 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4452 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4453
4454 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4455 return obj != nullptr && is_subclass(obj->klass());
4456 }
4457
4458 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4459 InstanceKlass* k = vmClasses::CallConv_klass();
4460 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4461 }
4462
4463 #if INCLUDE_CDS
4464 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4465 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4466 }
4467 #endif
4468
4469 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4470 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4471 }
4472
4473 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4474 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4475 }
4476
4477 oop java_lang_invoke_MethodHandle::type(oop mh) {
4478 return mh->obj_field(_type_offset);
4479 }
4480
4481 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4482 mh->obj_field_put(_type_offset, mtype);
4483 }
4484
4485 oop java_lang_invoke_MethodHandle::form(oop mh) {
4486 assert(_form_offset != 0, "");
4487 return mh->obj_field(_form_offset);
4488 }
4489
4490 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4491 assert(_form_offset != 0, "");
4492 mh->obj_field_put(_form_offset, lform);
4493 }
4494
4495 /// MemberName accessors
4496
4497 oop java_lang_invoke_MemberName::clazz(oop mname) {
4498 assert(is_instance(mname), "wrong type");
4499 return mname->obj_field(_clazz_offset);
4500 }
4501
4502 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4503 assert(is_instance(mname), "wrong type");
4504 mname->obj_field_put(_clazz_offset, clazz);
4505 }
4506
4507 oop java_lang_invoke_MemberName::name(oop mname) {
4508 assert(is_instance(mname), "wrong type");
4509 return mname->obj_field(_name_offset);
4510 }
4511
4512 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4513 assert(is_instance(mname), "wrong type");
4514 mname->obj_field_put(_name_offset, name);
4515 }
4516
4517 oop java_lang_invoke_MemberName::type(oop mname) {
4518 assert(is_instance(mname), "wrong type");
4519 return mname->obj_field(_type_offset);
4520 }
4521
4522 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4523 assert(is_instance(mname), "wrong type");
4524 mname->obj_field_put(_type_offset, type);
4525 }
4526
4527 int java_lang_invoke_MemberName::flags(oop mname) {
4528 assert(is_instance(mname), "wrong type");
4529 return mname->int_field(_flags_offset);
4530 }
4531
4532 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4533 assert(is_instance(mname), "wrong type");
4534 mname->int_field_put(_flags_offset, flags);
4535 }
4536
4537
4538 // Return vmtarget from ResolvedMethodName method field through indirection
4539 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4540 assert(is_instance(mname), "wrong type");
4541 oop method = mname->obj_field(_method_offset);
4542 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4543 }
4544
4545 bool java_lang_invoke_MemberName::is_method(oop mname) {
4546 assert(is_instance(mname), "must be MemberName");
4547 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
4548 }
4549
4550 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4551 assert(is_instance(mname), "wrong type");
4552 mname->obj_field_put(_method_offset, resolved_method);
4553 }
4554
4555 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4556 assert(is_instance(mname), "wrong type");
4557 return (intptr_t) mname->address_field(_vmindex_offset);
4558 }
4559
4560 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4561 assert(is_instance(mname), "wrong type");
4562 mname->address_field_put(_vmindex_offset, (address) index);
4563 }
4564
4565
4566 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4567 assert(is_instance(resolved_method), "wrong type");
4568 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4569 assert(m->is_method(), "must be");
4570 return m;
4571 }
4572
4573 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4574 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4575 assert(is_instance(resolved_method), "wrong type");
4576 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4577 }
4578
4579 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4580 assert(is_instance(resolved_method), "wrong type");
4581 resolved_method->obj_field_put(_vmholder_offset, holder);
4582 }
4583
4584 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4585 const Method* method = m();
4586
4587 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4588 oop resolved_method = ResolvedMethodTable::find_method(method);
4589 if (resolved_method != nullptr) {
4590 return resolved_method;
4591 }
4592
4593 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4594 if (!k->is_initialized()) {
4595 k->initialize(CHECK_NULL);
4596 }
4597
4598 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4599
4600 NoSafepointVerifier nsv;
4601
4602 if (method->is_old()) {
4603 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4604 method->get_new_method();
4605 }
4606
4607 InstanceKlass* holder = method->method_holder();
4608
4609 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4610 // Add a reference to the loader (actually mirror because hidden classes may not have
4611 // distinct loaders) to ensure the metadata is kept alive.
4612 // This mirror may be different than the one in clazz field.
4613 set_vmholder(new_resolved_method, holder->java_mirror());
4614
4615 // Set flag in class to indicate this InstanceKlass has entries in the table
4616 // to avoid walking table during redefinition if none of the redefined classes
4617 // have any membernames in the table.
4618 holder->set_has_resolved_methods();
4619
4620 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4621 }
4622
4623 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4624 assert(is_instance(lform), "wrong type");
4625 return lform->obj_field(_vmentry_offset);
4626 }
4627
4628
4629 // Support for java_lang_invoke_MethodType
4630
4631 int java_lang_invoke_MethodType::_rtype_offset;
4632 int java_lang_invoke_MethodType::_ptypes_offset;
4633
4634 #define METHODTYPE_FIELDS_DO(macro) \
4635 macro(_rtype_offset, k, "rtype", class_signature, false); \
4636 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4637
4638 void java_lang_invoke_MethodType::compute_offsets() {
4639 InstanceKlass* k = vmClasses::MethodType_klass();
4640 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4641 }
4642
4643 #if INCLUDE_CDS
4644 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4645 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4646 }
4647 #endif
4648
4649 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4650 st->print("(");
4651 objArrayOop pts = ptypes(mt);
4652 if (pts != nullptr) {
4653 for (int i = 0, limit = pts->length(); i < limit; i++) {
4654 java_lang_Class::print_signature(pts->obj_at(i), st);
4655 }
4656 } else {
4657 st->print("null");
4658 }
4659 st->print(")");
4660 oop rt = rtype(mt);
4661 if (rt != nullptr) {
4662 java_lang_Class::print_signature(rt, st);
4663 } else {
4664 st->print("null");
4665 }
4666 }
4667
4668 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4669 ResourceMark rm;
4670 stringStream buffer(128);
4671 print_signature(mt, &buffer);
4672 const char* sigstr = buffer.base();
4673 int siglen = (int) buffer.size();
4674 Symbol *name;
4675 if (!intern_if_not_found) {
4676 name = SymbolTable::probe(sigstr, siglen);
4677 } else {
4678 name = SymbolTable::new_symbol(sigstr, siglen);
4679 }
4680 return name;
4681 }
4682
4683 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4684 if (mt1 == mt2)
4685 return true;
4686 if (rtype(mt1) != rtype(mt2))
4687 return false;
4688 if (ptype_count(mt1) != ptype_count(mt2))
4689 return false;
4690 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4691 if (ptype(mt1, i) != ptype(mt2, i))
4692 return false;
4693 }
4694 return true;
4695 }
4696
4697 oop java_lang_invoke_MethodType::rtype(oop mt) {
4698 assert(is_instance(mt), "must be a MethodType");
4699 return mt->obj_field(_rtype_offset);
4700 }
4701
4702 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4703 assert(is_instance(mt), "must be a MethodType");
4704 return (objArrayOop) mt->obj_field(_ptypes_offset);
4705 }
4706
4707 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4708 return ptypes(mt)->obj_at(idx);
4709 }
4710
4711 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4712 return ptypes(mt)->length();
4713 }
4714
4715 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4716 objArrayOop pts = ptypes(mt);
4717 int count = pts->length();
4718 int slots = 0;
4719 for (int i = 0; i < count; i++) {
4720 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4721 slots += type2size[bt];
4722 }
4723 return slots;
4724 }
4725
4726 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4727 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4728 return type2size[bt];
4729 }
4730
4731
4732 // Support for java_lang_invoke_CallSite
4733
4734 int java_lang_invoke_CallSite::_target_offset;
4735 int java_lang_invoke_CallSite::_vmdependencies_offset;
4736 int java_lang_invoke_CallSite::_last_cleanup_offset;
4737
4738 #define CALLSITE_FIELDS_DO(macro) \
4739 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
4740
4741 void java_lang_invoke_CallSite::compute_offsets() {
4742 InstanceKlass* k = vmClasses::CallSite_klass();
4743 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4744 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4745 }
4746
4747 #if INCLUDE_CDS
4748 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4749 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4750 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4751 }
4752 #endif
4753
4754 DependencyContext java_lang_invoke_CallSite::vmdependencies(oop call_site) {
4755 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4756 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4757 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4758 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4759 return dep_ctx;
4760 }
4761
4762 // Support for java_lang_invoke_ConstantCallSite
4763
4764 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4765
4766 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4767 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4768
4769 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4770 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4771 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4772 }
4773
4774 #if INCLUDE_CDS
4775 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4776 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4777 }
4778 #endif
4779
4780 // Support for java_lang_ClassLoader
4781
4782 int java_lang_ClassLoader::_loader_data_offset;
4783 int java_lang_ClassLoader::_parallelCapable_offset;
4784 int java_lang_ClassLoader::_name_offset;
4785 int java_lang_ClassLoader::_nameAndId_offset;
4786 int java_lang_ClassLoader::_unnamedModule_offset;
4787 int java_lang_ClassLoader::_parent_offset;
4788
4789 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4790 assert(loader != nullptr, "loader must not be null");
4791 assert(oopDesc::is_oop(loader), "loader must be oop");
4792 return AtomicAccess::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4793 }
4794
4795 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4796 assert(loader != nullptr, "loader must not be null");
4797 assert(oopDesc::is_oop(loader), "loader must be oop");
4798 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4799 }
4800
4801 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4802 assert(loader != nullptr, "loader must not be null");
4803 assert(oopDesc::is_oop(loader), "loader must be oop");
4804 AtomicAccess::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4805 }
4806
4807 #define CLASSLOADER_FIELDS_DO(macro) \
4808 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4809 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4810 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
4811 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4812 macro(_parent_offset, k1, "parent", classloader_signature, false)
4813
4814 void java_lang_ClassLoader::compute_offsets() {
4815 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4816 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4817
4818 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4819 }
4820
4821 #if INCLUDE_CDS
4822 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4823 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4824 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4825 }
4826 #endif
4827
4828 oop java_lang_ClassLoader::parent(oop loader) {
4829 assert(is_instance(loader), "loader must be oop");
4830 return loader->obj_field(_parent_offset);
4831 }
4832
4833 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4834 assert(is_instance(loader), "loader must be oop");
4835 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4836 }
4837
4838 // Returns the name field of this class loader. If the name field has not
4839 // been set, null will be returned.
4840 oop java_lang_ClassLoader::name(oop loader) {
4841 assert(is_instance(loader), "loader must be oop");
4842 return loader->obj_field(_name_offset);
4843 }
4844
4845 // Returns the nameAndId field of this class loader. The format is
4846 // as follows:
4847 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4848 // If the defining loader has no name then <qualified-class-name> @<id>
4849 // If built-in loader, then omit '@<id>' as there is only one instance.
4850 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4851 oop java_lang_ClassLoader::nameAndId(oop loader) {
4852 assert(is_instance(loader), "loader must be oop");
4853 return loader->obj_field(_nameAndId_offset);
4854 }
4855
4856 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4857 assert(is_instance(loader), "loader must be oop");
4858 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4859 oop acl = loader;
4860 DEBUG_ONLY(jint loop_count = 0);
4861 // This loop taken verbatim from ClassLoader.java:
4862 do {
4863 acl = parent(acl);
4864 if (cl == acl) {
4865 return true;
4866 }
4867 assert(++loop_count > 0, "loop_count overflow");
4868 } while (acl != nullptr);
4869 return false;
4870 }
4871
4872 bool java_lang_ClassLoader::is_instance(oop obj) {
4873 return obj != nullptr && is_subclass(obj->klass());
4874 }
4875
4876
4877 // For class loader classes, parallelCapable defined
4878 // based on non-null field
4879 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4880 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4881 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4882 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4883 }
4884
4885 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4886 oop cl = SystemDictionary::java_system_loader();
4887 while(cl != nullptr) {
4888 if (cl == loader) return true;
4889 cl = parent(cl);
4890 }
4891 return false;
4892 }
4893
4894 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4895 assert(is_instance(loader), "loader must be oop");
4896 return loader->obj_field(_unnamedModule_offset);
4897 }
4898
4899 // Support for java_lang_System
4900 //
4901
4902 int java_lang_System::_static_in_offset;
4903 int java_lang_System::_static_out_offset;
4904 int java_lang_System::_static_err_offset;
4905
4906 #define SYSTEM_FIELDS_DO(macro) \
4907 macro(_static_in_offset, k, "in", input_stream_signature, true); \
4908 macro(_static_out_offset, k, "out", print_stream_signature, true); \
4909 macro(_static_err_offset, k, "err", print_stream_signature, true);
4910
4911 void java_lang_System::compute_offsets() {
4912 InstanceKlass* k = vmClasses::System_klass();
4913 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4914 }
4915
4916 #if INCLUDE_CDS
4917 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4918 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4919 }
4920 #endif
4921
4922 // Support for jdk_internal_misc_UnsafeConstants
4923 //
4924 class UnsafeConstantsFixup : public FieldClosure {
4925 private:
4926 int _address_size;
4927 int _page_size;
4928 bool _big_endian;
4929 bool _use_unaligned_access;
4930 int _data_cache_line_flush_size;
4931 public:
4932 UnsafeConstantsFixup() {
4933 // round up values for all static final fields
4934 _address_size = sizeof(void*);
4935 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4936 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4937 _use_unaligned_access = UseUnalignedAccesses;
4938 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4939 }
4940
4941 void do_field(fieldDescriptor* fd) {
4942 oop mirror = fd->field_holder()->java_mirror();
4943 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4944 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4945 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4946 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4947 if (fd->name() == vmSymbols::address_size_name()) {
4948 mirror->int_field_put(fd->offset(), _address_size);
4949 } else if (fd->name() == vmSymbols::page_size_name()) {
4950 mirror->int_field_put(fd->offset(), _page_size);
4951 } else if (fd->name() == vmSymbols::big_endian_name()) {
4952 mirror->bool_field_put(fd->offset(), _big_endian);
4953 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4954 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4955 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4956 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4957 } else {
4958 assert(false, "unexpected UnsafeConstants field");
4959 }
4960 }
4961 };
4962
4963 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4964 UnsafeConstantsFixup fixup;
4965 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4966 }
4967
4968
4969 // java_lang_StackTraceElement
4970
4971 int java_lang_StackTraceElement::_methodName_offset;
4972 int java_lang_StackTraceElement::_fileName_offset;
4973 int java_lang_StackTraceElement::_lineNumber_offset;
4974 int java_lang_StackTraceElement::_moduleName_offset;
4975 int java_lang_StackTraceElement::_moduleVersion_offset;
4976 int java_lang_StackTraceElement::_classLoaderName_offset;
4977 int java_lang_StackTraceElement::_declaringClass_offset;
4978 int java_lang_StackTraceElement::_declaringClassObject_offset;
4979
4980 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4981 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4982 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4983 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
4984 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4985 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
4986 macro(_methodName_offset, k, "methodName", string_signature, false); \
4987 macro(_fileName_offset, k, "fileName", string_signature, false); \
4988 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
4989
4990 // Support for java_lang_StackTraceElement
4991 void java_lang_StackTraceElement::compute_offsets() {
4992 InstanceKlass* k = vmClasses::StackTraceElement_klass();
4993 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4994 }
4995
4996 #if INCLUDE_CDS
4997 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4998 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4999 }
5000 #endif
5001
5002 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
5003 element->obj_field_put(_fileName_offset, value);
5004 }
5005
5006 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
5007 element->obj_field_put(_declaringClass_offset, value);
5008 }
5009
5010 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
5011 element->obj_field_put(_methodName_offset, value);
5012 }
5013
5014 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
5015 element->int_field_put(_lineNumber_offset, value);
5016 }
5017
5018 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
5019 element->obj_field_put(_moduleName_offset, value);
5020 }
5021
5022 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
5023 element->obj_field_put(_moduleVersion_offset, value);
5024 }
5025
5026 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
5027 element->obj_field_put(_classLoaderName_offset, value);
5028 }
5029
5030 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
5031 element->obj_field_put(_declaringClassObject_offset, value);
5032 }
5033
5034
5035 // java_lang_AssertionStatusDirectives
5036
5037 int java_lang_AssertionStatusDirectives::_classes_offset;
5038 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
5039 int java_lang_AssertionStatusDirectives::_packages_offset;
5040 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
5041 int java_lang_AssertionStatusDirectives::_deflt_offset;
5042
5043 // Support for java Assertions - java_lang_AssertionStatusDirectives.
5044 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
5045 macro(_classes_offset, k, "classes", string_array_signature, false); \
5046 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
5047 macro(_packages_offset, k, "packages", string_array_signature, false); \
5048 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
5049 macro(_deflt_offset, k, "deflt", bool_signature, false)
5050
5051 void java_lang_AssertionStatusDirectives::compute_offsets() {
5052 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
5053 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5054 }
5055
5056 #if INCLUDE_CDS
5057 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
5058 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5059 }
5060 #endif
5061
5062 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
5063 o->obj_field_put(_classes_offset, val);
5064 }
5065
5066 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
5067 o->obj_field_put(_classEnabled_offset, val);
5068 }
5069
5070 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
5071 o->obj_field_put(_packages_offset, val);
5072 }
5073
5074 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
5075 o->obj_field_put(_packageEnabled_offset, val);
5076 }
5077
5078 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
5079 o->bool_field_put(_deflt_offset, val);
5080 }
5081
5082 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
5083
5084 #define AOS_FIELDS_DO(macro) \
5085 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
5086
5087 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
5088 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
5089 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5090 }
5091
5092 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
5093 assert(_owner_offset != 0, "Must be initialized");
5094 return obj->obj_field(_owner_offset);
5095 }
5096
5097 #if INCLUDE_CDS
5098 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
5099 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5100 }
5101 #endif
5102
5103 int vector_VectorPayload::_payload_offset;
5104
5105 #define VECTORPAYLOAD_FIELDS_DO(macro) \
5106 macro(_payload_offset, k, "payload", object_signature, false)
5107
5108 void vector_VectorPayload::compute_offsets() {
5109 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
5110 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5111 }
5112
5113 #if INCLUDE_CDS
5114 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
5115 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5116 }
5117 #endif
5118
5119 void vector_VectorPayload::set_payload(oop o, oop val) {
5120 o->obj_field_put(_payload_offset, val);
5121 }
5122
5123 bool vector_VectorPayload::is_instance(oop obj) {
5124 return obj != nullptr && is_subclass(obj->klass());
5125 }
5126
5127 int java_lang_Integer_IntegerCache::_static_cache_offset;
5128 int java_lang_Long_LongCache::_static_cache_offset;
5129 int java_lang_Character_CharacterCache::_static_cache_offset;
5130 int java_lang_Short_ShortCache::_static_cache_offset;
5131 int java_lang_Byte_ByteCache::_static_cache_offset;
5132
5133 #define INTEGER_CACHE_FIELDS_DO(macro) \
5134 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5135
5136 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5137 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5138 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5139 }
5140
5141 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5142 oop base = ik->static_field_base_raw();
5143 return objArrayOop(base->obj_field(_static_cache_offset));
5144 }
5145
5146 Symbol* java_lang_Integer_IntegerCache::symbol() {
5147 return vmSymbols::java_lang_Integer_IntegerCache();
5148 }
5149
5150 #if INCLUDE_CDS
5151 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5152 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5153 }
5154 #endif
5155 #undef INTEGER_CACHE_FIELDS_DO
5156
5157 jint java_lang_Integer::value(oop obj) {
5158 jvalue v;
5159 java_lang_boxing_object::get_value(obj, &v);
5160 return v.i;
5161 }
5162
5163 #define LONG_CACHE_FIELDS_DO(macro) \
5164 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5165
5166 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5167 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5168 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5169 }
5170
5171 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5172 oop base = ik->static_field_base_raw();
5173 return objArrayOop(base->obj_field(_static_cache_offset));
5174 }
5175
5176 Symbol* java_lang_Long_LongCache::symbol() {
5177 return vmSymbols::java_lang_Long_LongCache();
5178 }
5179
5180 #if INCLUDE_CDS
5181 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5182 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5183 }
5184 #endif
5185 #undef LONG_CACHE_FIELDS_DO
5186
5187 jlong java_lang_Long::value(oop obj) {
5188 jvalue v;
5189 java_lang_boxing_object::get_value(obj, &v);
5190 return v.j;
5191 }
5192
5193 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5194 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5195
5196 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5197 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5198 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5199 }
5200
5201 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5202 oop base = ik->static_field_base_raw();
5203 return objArrayOop(base->obj_field(_static_cache_offset));
5204 }
5205
5206 Symbol* java_lang_Character_CharacterCache::symbol() {
5207 return vmSymbols::java_lang_Character_CharacterCache();
5208 }
5209
5210 #if INCLUDE_CDS
5211 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5212 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5213 }
5214 #endif
5215 #undef CHARACTER_CACHE_FIELDS_DO
5216
5217 jchar java_lang_Character::value(oop obj) {
5218 jvalue v;
5219 java_lang_boxing_object::get_value(obj, &v);
5220 return v.c;
5221 }
5222
5223 #define SHORT_CACHE_FIELDS_DO(macro) \
5224 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5225
5226 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5227 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5228 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5229 }
5230
5231 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5232 oop base = ik->static_field_base_raw();
5233 return objArrayOop(base->obj_field(_static_cache_offset));
5234 }
5235
5236 Symbol* java_lang_Short_ShortCache::symbol() {
5237 return vmSymbols::java_lang_Short_ShortCache();
5238 }
5239
5240 #if INCLUDE_CDS
5241 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5242 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5243 }
5244 #endif
5245 #undef SHORT_CACHE_FIELDS_DO
5246
5247 jshort java_lang_Short::value(oop obj) {
5248 jvalue v;
5249 java_lang_boxing_object::get_value(obj, &v);
5250 return v.s;
5251 }
5252
5253 #define BYTE_CACHE_FIELDS_DO(macro) \
5254 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5255
5256 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5257 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5258 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5259 }
5260
5261 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5262 oop base = ik->static_field_base_raw();
5263 return objArrayOop(base->obj_field(_static_cache_offset));
5264 }
5265
5266 Symbol* java_lang_Byte_ByteCache::symbol() {
5267 return vmSymbols::java_lang_Byte_ByteCache();
5268 }
5269
5270 #if INCLUDE_CDS
5271 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5272 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5273 }
5274 #endif
5275 #undef BYTE_CACHE_FIELDS_DO
5276
5277 jbyte java_lang_Byte::value(oop obj) {
5278 jvalue v;
5279 java_lang_boxing_object::get_value(obj, &v);
5280 return v.b;
5281 }
5282
5283 int java_lang_Boolean::_static_TRUE_offset;
5284 int java_lang_Boolean::_static_FALSE_offset;
5285
5286 #define BOOLEAN_FIELDS_DO(macro) \
5287 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5288 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5289
5290
5291 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5292 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5293 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5294 }
5295
5296 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5297 oop base = ik->static_field_base_raw();
5298 return base->obj_field(_static_TRUE_offset);
5299 }
5300
5301 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5302 oop base = ik->static_field_base_raw();
5303 return base->obj_field(_static_FALSE_offset);
5304 }
5305
5306 Symbol* java_lang_Boolean::symbol() {
5307 return vmSymbols::java_lang_Boolean();
5308 }
5309
5310 #if INCLUDE_CDS
5311 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5312 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5313 }
5314 #endif
5315 #undef BOOLEAN_CACHE_FIELDS_DO
5316
5317 jboolean java_lang_Boolean::value(oop obj) {
5318 jvalue v;
5319 java_lang_boxing_object::get_value(obj, &v);
5320 return v.z;
5321 }
5322
5323 // java_lang_reflect_RecordComponent
5324
5325 int java_lang_reflect_RecordComponent::_clazz_offset;
5326 int java_lang_reflect_RecordComponent::_name_offset;
5327 int java_lang_reflect_RecordComponent::_type_offset;
5328 int java_lang_reflect_RecordComponent::_accessor_offset;
5329 int java_lang_reflect_RecordComponent::_signature_offset;
5330 int java_lang_reflect_RecordComponent::_annotations_offset;
5331 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5332
5333 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5334 macro(_clazz_offset, k, "clazz", class_signature, false); \
5335 macro(_name_offset, k, "name", string_signature, false); \
5336 macro(_type_offset, k, "type", class_signature, false); \
5337 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5338 macro(_signature_offset, k, "signature", string_signature, false); \
5339 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5340 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5341
5342 // Support for java_lang_reflect_RecordComponent
5343 void java_lang_reflect_RecordComponent::compute_offsets() {
5344 InstanceKlass* k = vmClasses::RecordComponent_klass();
5345 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5346 }
5347
5348 #if INCLUDE_CDS
5349 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5350 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5351 }
5352 #endif
5353
5354 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5355 element->obj_field_put(_clazz_offset, value);
5356 }
5357
5358 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5359 element->obj_field_put(_name_offset, value);
5360 }
5361
5362 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5363 element->obj_field_put(_type_offset, value);
5364 }
5365
5366 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5367 element->obj_field_put(_accessor_offset, value);
5368 }
5369
5370 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5371 element->obj_field_put(_signature_offset, value);
5372 }
5373
5374 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5375 element->obj_field_put(_annotations_offset, value);
5376 }
5377
5378 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5379 element->obj_field_put(_typeAnnotations_offset, value);
5380 }
5381
5382 // java_lang_InternalError
5383 int java_lang_InternalError::_during_unsafe_access_offset;
5384
5385 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5386 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5387 }
5388
5389 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5390 return internal_error->bool_field(_during_unsafe_access_offset);
5391 }
5392
5393 void java_lang_InternalError::compute_offsets() {
5394 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5395 }
5396
5397 #if INCLUDE_CDS
5398 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5399 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5400 }
5401 #endif
5402
5403 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5404 f(java_lang_Class) \
5405 f(java_lang_String) \
5406 f(java_lang_ref_Reference) \
5407 //end
5408
5409 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5410 f(java_lang_System) \
5411 f(java_lang_ClassLoader) \
5412 f(java_lang_Throwable) \
5413 f(java_lang_Thread) \
5414 f(java_lang_Thread_FieldHolder) \
5415 f(java_lang_Thread_Constants) \
5416 f(java_lang_ThreadGroup) \
5417 f(java_lang_VirtualThread) \
5418 f(java_lang_InternalError) \
5419 f(java_lang_AssertionStatusDirectives) \
5420 f(java_lang_ref_SoftReference) \
5421 f(java_lang_invoke_MethodHandle) \
5422 f(java_lang_invoke_DirectMethodHandle) \
5423 f(java_lang_invoke_MemberName) \
5424 f(java_lang_invoke_ResolvedMethodName) \
5425 f(java_lang_invoke_LambdaForm) \
5426 f(java_lang_invoke_MethodType) \
5427 f(java_lang_invoke_CallSite) \
5428 f(java_lang_invoke_ConstantCallSite) \
5429 f(java_lang_reflect_AccessibleObject) \
5430 f(java_lang_reflect_Method) \
5431 f(java_lang_reflect_Constructor) \
5432 f(java_lang_reflect_Field) \
5433 f(java_lang_reflect_RecordComponent) \
5434 f(reflect_ConstantPool) \
5435 f(java_lang_reflect_Parameter) \
5436 f(java_lang_Module) \
5437 f(java_lang_StackTraceElement) \
5438 f(java_lang_ClassFrameInfo) \
5439 f(java_lang_StackFrameInfo) \
5440 f(java_lang_LiveStackFrameInfo) \
5441 f(jdk_internal_vm_ContinuationScope) \
5442 f(jdk_internal_vm_Continuation) \
5443 f(jdk_internal_vm_StackChunk) \
5444 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5445 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5446 f(jdk_internal_foreign_abi_ABIDescriptor) \
5447 f(jdk_internal_foreign_abi_VMStorage) \
5448 f(jdk_internal_foreign_abi_CallConv) \
5449 f(jdk_internal_misc_UnsafeConstants) \
5450 f(java_lang_boxing_object) \
5451 f(vector_VectorPayload) \
5452 //end
5453
5454 #define BASIC_JAVA_CLASSES_DO(f) \
5455 BASIC_JAVA_CLASSES_DO_PART1(f) \
5456 BASIC_JAVA_CLASSES_DO_PART2(f)
5457
5458 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5459
5460 // Compute field offsets of all the classes in this file
5461 void JavaClasses::compute_offsets() {
5462 if (CDSConfig::is_using_archive()) {
5463 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5464 JvmtiExport::has_early_class_hook_env()),
5465 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5466 // None of the classes used by the rest of this function can be replaced by
5467 // JVMTI ClassFileLoadHook.
5468 // We are safe to use the archived offsets, which have already been restored
5469 // by JavaClasses::serialize_offsets, without computing the offsets again.
5470 return;
5471 }
5472
5473 // We have already called the compute_offsets() of the
5474 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5475 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5476 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5477 }
5478
5479 #if INCLUDE_CDS
5480 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5481
5482 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5483 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5484 }
5485 #endif
5486
5487 #if INCLUDE_CDS_JAVA_HEAP
5488 bool JavaClasses::is_supported_for_archiving(oop obj) {
5489 Klass* klass = obj->klass();
5490
5491 if (!CDSConfig::is_dumping_method_handles()) {
5492 // These are supported by CDS only when CDSConfig::is_dumping_method_handles() is enabled.
5493 if (klass == vmClasses::ResolvedMethodName_klass() ||
5494 klass == vmClasses::MemberName_klass()) {
5495 return false;
5496 }
5497 }
5498
5499 if (!AOTReferenceObjSupport::is_enabled() && klass->is_subclass_of(vmClasses::Reference_klass())) {
5500 return false;
5501 }
5502
5503 return true;
5504 }
5505 #endif
5506
5507 #ifndef PRODUCT
5508
5509 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5510
5511 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5512 const char* field_sig) {
5513 EXCEPTION_MARK;
5514 fieldDescriptor fd;
5515 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5516 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5517 InstanceKlass* ik = InstanceKlass::cast(k);
5518 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5519 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5520 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5521 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5522 return false;
5523 }
5524 if (fd.is_static()) {
5525 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5526 return false;
5527 }
5528 if (fd.offset() == deserialized_offset ) {
5529 return true;
5530 } else {
5531 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5532 klass_name, field_name, deserialized_offset, fd.offset());
5533 return false;
5534 }
5535 }
5536
5537 void JavaClasses::check_offsets() {
5538 bool valid = true;
5539
5540 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5541 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5542
5543 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5544 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5545
5546 // Boxed primitive objects (java_lang_boxing_object)
5547
5548 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
5549 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5550 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
5551 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5552 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
5553 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
5554 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
5555 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5556
5557 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5558 }
5559
5560 #endif // PRODUCT
5561
5562 int InjectedField::compute_offset() {
5563 InstanceKlass* ik = klass();
5564 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5565 if (!may_be_java && !fs.field_flags().is_injected()) {
5566 // Only look at injected fields
5567 continue;
5568 }
5569 if (fs.name() == name() && fs.signature() == signature()) {
5570 return fs.offset();
5571 }
5572 }
5573 ResourceMark rm;
5574 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)" : "");
5575 #ifndef PRODUCT
5576 ik->print();
5577 tty->print_cr("all fields:");
5578 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5579 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_field_flags());
5580 }
5581 #endif //PRODUCT
5582 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5583 return -1;
5584 }
5585
5586 void javaClasses_init() {
5587 JavaClasses::compute_offsets();
5588 JavaClasses::check_offsets();
5589 }