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_is_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_is_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 void java_lang_Class::set_reflection_data(oop java_class, oop reflection_data) {
1341 assert(_reflectionData_offset != 0, "must be set");
1342 java_class->obj_field_put(_reflectionData_offset, reflection_data);
1343 }
1344
1345 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1346 assert(_class_loader_offset != 0, "offsets should have been initialized");
1347 java_class->obj_field_put(_class_loader_offset, loader);
1348 }
1349
1350 oop java_lang_Class::class_loader(oop java_class) {
1351 assert(_class_loader_offset != 0, "must be set");
1352 return java_class->obj_field(_class_loader_offset);
1353 }
1354
1355 oop java_lang_Class::module(oop java_class) {
1356 assert(_module_offset != 0, "must be set");
1357 return java_class->obj_field(_module_offset);
1358 }
1359
1360 void java_lang_Class::set_module(oop java_class, oop module) {
1361 assert(_module_offset != 0, "must be set");
1362 java_class->obj_field_put(_module_offset, module);
1363 }
1364
1365 oop java_lang_Class::name(Handle java_class, TRAPS) {
1366 assert(_name_offset != 0, "must be set");
1367 oop o = java_class->obj_field(_name_offset);
1368 if (o == nullptr) {
1369 o = StringTable::intern(as_external_name(java_class()), THREAD);
1370 java_class->obj_field_put(_name_offset, o);
1371 }
1372 return o;
1373 }
1374
1375 oop java_lang_Class::source_file(oop java_class) {
1376 assert(_source_file_offset != 0, "must be set");
1377 return java_class->obj_field(_source_file_offset);
1378 }
1379
1380 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1381 assert(_source_file_offset != 0, "must be set");
1382 java_class->obj_field_put(_source_file_offset, source_file);
1383 }
1384
1385 void java_lang_Class::set_is_primitive(oop java_class) {
1386 assert(_is_primitive_offset != 0, "must be set");
1387 java_class->bool_field_put(_is_primitive_offset, true);
1388 }
1389
1390
1391 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1392 // Mirrors for basic types have a null klass field, which makes them special.
1393 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1394 if (type != T_VOID) {
1395 Klass* aklass = Universe::typeArrayKlass(type);
1396 assert(aklass != nullptr, "correct bootstrap");
1397 release_set_array_klass(java_class, aklass);
1398 }
1399 #ifdef ASSERT
1400 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1401 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1402 #endif
1403 set_modifiers(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
1404 set_raw_access_flags(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
1405
1406 set_is_primitive(java_class);
1407 return java_class;
1408 }
1409
1410 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1411 assert(is_instance(java_class), "must be a Class object");
1412 java_class->metadata_field_put(_klass_offset, klass);
1413 }
1414
1415
1416 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1417 assert(is_instance(java_class), "must be a Class object");
1418 Symbol* name = nullptr;
1419 bool is_instance = false;
1420 if (is_primitive(java_class)) {
1421 name = vmSymbols::type_signature(primitive_type(java_class));
1422 } else {
1423 Klass* k = as_Klass(java_class);
1424 is_instance = k->is_instance_klass();
1425 name = k->name();
1426 }
1427 if (name == nullptr) {
1428 st->print("<null>");
1429 return;
1430 }
1431 if (is_instance) st->print("L");
1432 st->write((char*) name->base(), (int) name->utf8_length());
1433 if (is_instance) st->print(";");
1434 }
1435
1436 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1437 assert(is_instance(java_class), "must be a Class object");
1438 Symbol* name;
1439 if (is_primitive(java_class)) {
1440 name = vmSymbols::type_signature(primitive_type(java_class));
1441 // Because this can create a new symbol, the caller has to decrement
1442 // the refcount, so make adjustment here and below for symbols returned
1443 // that are not created or incremented due to a successful lookup.
1444 name->increment_refcount();
1445 } else {
1446 Klass* k = as_Klass(java_class);
1447 if (!k->is_instance_klass()) {
1448 name = k->name();
1449 name->increment_refcount();
1450 } else {
1451 ResourceMark rm;
1452 const char* sigstr = k->signature_name();
1453 int siglen = (int) strlen(sigstr);
1454 if (!intern_if_not_found) {
1455 name = SymbolTable::probe(sigstr, siglen);
1456 } else {
1457 name = SymbolTable::new_symbol(sigstr, siglen);
1458 }
1459 }
1460 }
1461 return name;
1462 }
1463
1464 // Returns the Java name for this Java mirror (Resource allocated)
1465 // See Klass::external_name().
1466 // For primitive type Java mirrors, its type name is returned.
1467 const char* java_lang_Class::as_external_name(oop java_class) {
1468 assert(is_instance(java_class), "must be a Class object");
1469 const char* name = nullptr;
1470 if (is_primitive(java_class)) {
1471 name = type2name(primitive_type(java_class));
1472 } else {
1473 name = as_Klass(java_class)->external_name();
1474 }
1475 if (name == nullptr) {
1476 name = "<null>";
1477 }
1478 return name;
1479 }
1480
1481 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1482 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1483 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass");
1484 return k;
1485 }
1486
1487
1488 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1489 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1490 java_class->release_metadata_field_put(_array_klass_offset, klass);
1491 }
1492
1493
1494 BasicType java_lang_Class::primitive_type(oop java_class) {
1495 assert(is_primitive(java_class), "just checking");
1496 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1497 BasicType type = T_VOID;
1498 if (ak != nullptr) {
1499 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1500 type = ArrayKlass::cast(ak)->element_type();
1501 } else {
1502 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1503 }
1504 #ifdef ASSERT
1505 if (CDSConfig::is_dumping_heap()) {
1506 oop mirror = Universe::java_mirror(type);
1507 oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1508 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1509 } else {
1510 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1511 }
1512 #endif
1513 return type;
1514 }
1515
1516 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1517 assert(is_instance(java_class), "must be a Class object");
1518 if (is_primitive(java_class)) {
1519 if (reference_klass != nullptr)
1520 (*reference_klass) = nullptr;
1521 return primitive_type(java_class);
1522 } else {
1523 if (reference_klass != nullptr)
1524 (*reference_klass) = as_Klass(java_class);
1525 return T_OBJECT;
1526 }
1527 }
1528
1529
1530 oop java_lang_Class::primitive_mirror(BasicType t) {
1531 oop mirror = Universe::java_mirror(t);
1532 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1533 assert(is_primitive(mirror), "must be primitive");
1534 return mirror;
1535 }
1536
1537 #define CLASS_FIELDS_DO(macro) \
1538 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1539 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1540 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1541 macro(_module_offset, k, "module", module_signature, false); \
1542 macro(_name_offset, k, "name", string_signature, false); \
1543 macro(_classData_offset, k, "classData", object_signature, false); \
1544 macro(_reflectionData_offset, k, "reflectionData", java_lang_ref_SoftReference_signature, false); \
1545 macro(_signers_offset, k, "signers", object_array_signature, false); \
1546 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), char_signature, false); \
1547 macro(_raw_access_flags_offset, k, "classFileAccessFlags", char_signature, false); \
1548 macro(_protection_domain_offset, k, "protectionDomain", java_security_ProtectionDomain_signature, false); \
1549 macro(_is_primitive_offset, k, "primitive", bool_signature, false);
1550
1551 void java_lang_Class::compute_offsets() {
1552 if (_offsets_computed) {
1553 return;
1554 }
1555
1556 _offsets_computed = true;
1557
1558 InstanceKlass* k = vmClasses::Class_klass();
1559 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1560 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1561 }
1562
1563 #if INCLUDE_CDS
1564 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1565 f->do_bool(&_offsets_computed);
1566
1567 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1568
1569 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1570 }
1571 #endif
1572
1573 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1574 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1575 return the_class_mirror->int_field(_classRedefinedCount_offset);
1576 }
1577
1578 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1579 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1580 the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1581 }
1582
1583 int java_lang_Class::modifiers(oop the_class_mirror) {
1584 assert(_modifiers_offset != 0, "offsets should have been initialized");
1585 return the_class_mirror->char_field(_modifiers_offset);
1586 }
1587
1588 void java_lang_Class::set_modifiers(oop the_class_mirror, u2 value) {
1589 assert(_modifiers_offset != 0, "offsets should have been initialized");
1590 the_class_mirror->char_field_put(_modifiers_offset, value);
1591 }
1592
1593 int java_lang_Class::raw_access_flags(oop the_class_mirror) {
1594 assert(_raw_access_flags_offset != 0, "offsets should have been initialized");
1595 return the_class_mirror->char_field(_raw_access_flags_offset);
1596 }
1597
1598 void java_lang_Class::set_raw_access_flags(oop the_class_mirror, u2 value) {
1599 assert(_raw_access_flags_offset != 0, "offsets should have been initialized");
1600 the_class_mirror->char_field_put(_raw_access_flags_offset, value);
1601 }
1602
1603
1604 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1605 // platform thread structure, and a eetop offset which was used for thread
1606 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1607 // merged, so in the HotSpot VM we just use the eetop field for the thread
1608 // instead of the privateInfo_offset.
1609 //
1610 // Note: The stackSize field is only present starting in 1.4.
1611
1612 int java_lang_Thread_FieldHolder::_group_offset;
1613 int java_lang_Thread_FieldHolder::_priority_offset;
1614 int java_lang_Thread_FieldHolder::_stackSize_offset;
1615 int java_lang_Thread_FieldHolder::_daemon_offset;
1616 int java_lang_Thread_FieldHolder::_thread_status_offset;
1617
1618 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1619 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1620 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1621 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1622 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1623 macro(_thread_status_offset, k, "threadStatus", int_signature, false)
1624
1625 void java_lang_Thread_FieldHolder::compute_offsets() {
1626 assert(_group_offset == 0, "offsets should be initialized only once");
1627
1628 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1629 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1630 }
1631
1632 #if INCLUDE_CDS
1633 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1634 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1635 }
1636 #endif
1637
1638 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1639 return holder->obj_field(_group_offset);
1640 }
1641
1642 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1643 return (ThreadPriority)holder->int_field(_priority_offset);
1644 }
1645
1646 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1647 holder->int_field_put(_priority_offset, priority);
1648 }
1649
1650 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1651 return holder->long_field(_stackSize_offset);
1652 }
1653
1654 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1655 return holder->bool_field(_daemon_offset) != 0;
1656 }
1657
1658 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1659 assert(val, "daemon status is never turned off");
1660 holder->bool_field_put(_daemon_offset, val);
1661 }
1662
1663 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1664 holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1665 }
1666
1667 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1668 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1669 }
1670
1671
1672 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1673
1674 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1675 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true);
1676
1677 void java_lang_Thread_Constants::compute_offsets() {
1678 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1679
1680 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1681 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1682 }
1683
1684 #if INCLUDE_CDS
1685 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1686 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1687 }
1688 #endif
1689
1690 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1691 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1692 oop base = k->static_field_base_raw();
1693 return base->obj_field(_static_VTHREAD_GROUP_offset);
1694 }
1695
1696
1697 int java_lang_Thread::_holder_offset;
1698 int java_lang_Thread::_name_offset;
1699 int java_lang_Thread::_contextClassLoader_offset;
1700 int java_lang_Thread::_eetop_offset;
1701 int java_lang_Thread::_jvmti_thread_state_offset;
1702 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1703 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1704 int java_lang_Thread::_interrupted_offset;
1705 int java_lang_Thread::_interruptLock_offset;
1706 int java_lang_Thread::_tid_offset;
1707 int java_lang_Thread::_continuation_offset;
1708 int java_lang_Thread::_park_blocker_offset;
1709 int java_lang_Thread::_scopedValueBindings_offset;
1710 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1711
1712 #define THREAD_FIELDS_DO(macro) \
1713 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \
1714 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1715 macro(_contextClassLoader_offset, k, "contextClassLoader", classloader_signature, false); \
1716 macro(_eetop_offset, k, "eetop", long_signature, false); \
1717 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1718 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \
1719 macro(_tid_offset, k, "tid", long_signature, false); \
1720 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1721 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1722 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1723
1724 void java_lang_Thread::compute_offsets() {
1725 assert(_holder_offset == 0, "offsets should be initialized only once");
1726
1727 InstanceKlass* k = vmClasses::Thread_klass();
1728 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1729 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1730 }
1731
1732 #if INCLUDE_CDS
1733 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1734 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1735 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1736 }
1737 #endif
1738
1739 JavaThread* java_lang_Thread::thread(oop java_thread) {
1740 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1741 }
1742
1743 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1744 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1745 }
1746
1747 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1748 java_thread->address_field_put(_eetop_offset, (address)thread);
1749 }
1750
1751 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1752 java_thread->release_address_field_put(_eetop_offset, (address)thread);
1753 }
1754
1755 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1756 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1757 }
1758
1759 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1760 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1761 }
1762
1763 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1764 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1765 }
1766
1767 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1768 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1769 int val = VTMS_transition_disable_count(java_thread);
1770 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1771 }
1772
1773 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1774 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1775 int val = VTMS_transition_disable_count(java_thread);
1776 assert(val > 0, "VTMS_transition_disable_count should never be negative");
1777 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1778 }
1779
1780 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1781 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1782 }
1783
1784 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1785 assert(is_in_VTMS_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside");
1786 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1787 }
1788
1789 int java_lang_Thread::is_in_VTMS_transition_offset() {
1790 return _jvmti_is_in_VTMS_transition_offset;
1791 }
1792
1793 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1794 assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1795 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1796 }
1797
1798 oop java_lang_Thread::holder(oop java_thread) {
1799 // Note: may return null if the thread is still attaching
1800 return java_thread->obj_field(_holder_offset);
1801 }
1802 oop java_lang_Thread::interrupt_lock(oop java_thread) {
1803 return java_thread->obj_field(_interruptLock_offset);
1804 }
1805
1806 bool java_lang_Thread::interrupted(oop java_thread) {
1807 // Make sure the caller can safely access oops.
1808 assert(Thread::current()->is_VM_thread() ||
1809 (JavaThread::current()->thread_state() != _thread_blocked &&
1810 JavaThread::current()->thread_state() != _thread_in_native),
1811 "Unsafe access to oop");
1812 return java_thread->bool_field_volatile(_interrupted_offset);
1813 }
1814
1815 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
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 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1822 }
1823
1824
1825 oop java_lang_Thread::name(oop java_thread) {
1826 return java_thread->obj_field(_name_offset);
1827 }
1828
1829
1830 void java_lang_Thread::set_name(oop java_thread, oop name) {
1831 java_thread->obj_field_put(_name_offset, name);
1832 }
1833
1834 // Convenience macros for setting and getting Thread fields that
1835 // are actually stored in the FieldHolder object of the thread.
1836 // The FieldHolder can be null whilst a thread is attaching via
1837 // JNI, and when the main thread is attaching.
1838
1839 // The default value should be the default/zero initialized value
1840 // of the field as it would be in java.lang.Thread.FieldHolder.
1841 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \
1842 { \
1843 oop holder = java_lang_Thread::holder(java_thread); \
1844 if (holder != nullptr) \
1845 return java_lang_Thread_FieldHolder::field(holder); \
1846 else \
1847 return default_val; \
1848 }
1849
1850 // We should never be trying to set a field of an attaching thread.
1851 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \
1852 { \
1853 oop holder = java_lang_Thread::holder(java_thread); \
1854 assert(holder != nullptr, "Thread not fully initialized"); \
1855 java_lang_Thread_FieldHolder::set_##field(holder, value); \
1856 }
1857
1858
1859 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1860 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1861 }
1862
1863
1864 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1865 SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1866 }
1867
1868
1869 oop java_lang_Thread::threadGroup(oop java_thread) {
1870 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1871 }
1872
1873
1874 bool java_lang_Thread::is_alive(oop java_thread) {
1875 JavaThread* thr = java_lang_Thread::thread(java_thread);
1876 return (thr != nullptr);
1877 }
1878
1879
1880 bool java_lang_Thread::is_daemon(oop java_thread) {
1881 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1882 }
1883
1884
1885 void java_lang_Thread::set_daemon(oop java_thread) {
1886 SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1887 }
1888
1889 oop java_lang_Thread::context_class_loader(oop java_thread) {
1890 return java_thread->obj_field(_contextClassLoader_offset);
1891 }
1892
1893
1894 jlong java_lang_Thread::stackSize(oop java_thread) {
1895 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1896 }
1897
1898 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1899 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1900 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1901 }
1902
1903 // Read thread status value from threadStatus field in java.lang.Thread java class.
1904 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1905 // Make sure the caller is operating on behalf of the VM or is
1906 // running VM code (state == _thread_in_vm).
1907 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1908 JavaThread::current()->thread_state() == _thread_in_vm ||
1909 JavaThread::current() == java_lang_Thread::thread(java_thread),
1910 "unsafe call to java_lang_Thread::get_thread_status()?");
1911 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1912 }
1913
1914 ByteSize java_lang_Thread::thread_id_offset() {
1915 return in_ByteSize(_tid_offset);
1916 }
1917
1918 oop java_lang_Thread::park_blocker(oop java_thread) {
1919 return java_thread->obj_field_access<MO_RELAXED>(_park_blocker_offset);
1920 }
1921
1922 // Obtain stack trace for platform or mounted virtual thread.
1923 // If jthread is a virtual thread and it has been unmounted (or remounted to different carrier) the method returns null.
1924 // The caller (java.lang.VirtualThread) handles returned nulls via retry.
1925 oop java_lang_Thread::async_get_stack_trace(jobject jthread, TRAPS) {
1926 ThreadsListHandle tlh(THREAD);
1927 JavaThread* java_thread = nullptr;
1928 oop thread_oop;
1929
1930 bool has_java_thread = tlh.cv_internal_thread_to_JavaThread(jthread, &java_thread, &thread_oop);
1931 if (!has_java_thread) {
1932 return nullptr;
1933 }
1934
1935 class GetStackTraceHandshakeClosure : public HandshakeClosure {
1936 public:
1937 const Handle _thread_h;
1938 int _depth;
1939 bool _retry_handshake;
1940 GrowableArray<Method*>* _methods;
1941 GrowableArray<int>* _bcis;
1942
1943 GetStackTraceHandshakeClosure(Handle thread_h) :
1944 HandshakeClosure("GetStackTraceHandshakeClosure"), _thread_h(thread_h), _depth(0), _retry_handshake(false),
1945 _methods(nullptr), _bcis(nullptr) {
1946 }
1947 ~GetStackTraceHandshakeClosure() {
1948 delete _methods;
1949 delete _bcis;
1950 }
1951
1952 bool read_reset_retry() {
1953 bool ret = _retry_handshake;
1954 // If we re-execute the handshake this method need to return false
1955 // when the handshake cannot be performed. (E.g. thread terminating)
1956 _retry_handshake = false;
1957 return ret;
1958 }
1959
1960 void do_thread(Thread* th) {
1961 if (!Thread::current()->is_Java_thread()) {
1962 _retry_handshake = true;
1963 return;
1964 }
1965
1966 JavaThread* java_thread = JavaThread::cast(th);
1967
1968 if (!java_thread->has_last_Java_frame()) {
1969 return;
1970 }
1971
1972 bool carrier = false;
1973 if (java_lang_VirtualThread::is_instance(_thread_h())) {
1974 // Ensure _thread_h is still mounted to java_thread.
1975 const ContinuationEntry* ce = java_thread->vthread_continuation();
1976 if (ce == nullptr || ce->cont_oop(java_thread) != java_lang_VirtualThread::continuation(_thread_h())) {
1977 // Target thread has been unmounted.
1978 return;
1979 }
1980 } else {
1981 carrier = (java_thread->vthread_continuation() != nullptr);
1982 }
1983
1984 const int max_depth = MaxJavaStackTraceDepth;
1985 const bool skip_hidden = !ShowHiddenFrames;
1986
1987 // Pick minimum length that will cover most cases
1988 int init_length = 64;
1989 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1990 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
1991
1992 int total_count = 0;
1993 for (vframeStream vfst(java_thread, false, false, carrier); // we don't process frames as we don't care about oops
1994 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
1995 vfst.next()) {
1996
1997 if (skip_hidden && (vfst.method()->is_hidden() ||
1998 vfst.method()->is_continuation_enter_intrinsic())) {
1999 continue;
2000 }
2001
2002 _methods->push(vfst.method());
2003 _bcis->push(vfst.bci());
2004 total_count++;
2005 }
2006
2007 _depth = total_count;
2008 }
2009 };
2010
2011 // Handshake with target
2012 ResourceMark rm(THREAD);
2013 HandleMark hm(THREAD);
2014 GetStackTraceHandshakeClosure gsthc(Handle(THREAD, thread_oop));
2015 do {
2016 Handshake::execute(&gsthc, &tlh, java_thread);
2017 } while (gsthc.read_reset_retry());
2018
2019 // Stop if no stack trace is found.
2020 if (gsthc._depth == 0) {
2021 return nullptr;
2022 }
2023
2024 // Convert to StackTraceElement array
2025 InstanceKlass* k = vmClasses::StackTraceElement_klass();
2026 assert(k != nullptr, "must be loaded in 1.4+");
2027 if (k->should_be_initialized()) {
2028 k->initialize(CHECK_NULL);
2029 }
2030 objArrayHandle trace = oopFactory::new_objArray_handle(k, gsthc._depth, CHECK_NULL);
2031
2032 for (int i = 0; i < gsthc._depth; i++) {
2033 methodHandle method(THREAD, gsthc._methods->at(i));
2034 oop element = java_lang_StackTraceElement::create(method,
2035 gsthc._bcis->at(i),
2036 CHECK_NULL);
2037 trace->obj_at_put(i, element);
2038 }
2039
2040 return trace();
2041 }
2042
2043 const char* java_lang_Thread::thread_status_name(oop java_thread) {
2044 JavaThreadStatus status = get_thread_status(java_thread);
2045 switch (status) {
2046 case JavaThreadStatus::NEW : return "NEW";
2047 case JavaThreadStatus::RUNNABLE : return "RUNNABLE";
2048 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)";
2049 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)";
2050 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
2051 case JavaThreadStatus::PARKED : return "WAITING (parking)";
2052 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)";
2053 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
2054 case JavaThreadStatus::TERMINATED : return "TERMINATED";
2055 default : return "UNKNOWN";
2056 };
2057 }
2058 int java_lang_ThreadGroup::_parent_offset;
2059 int java_lang_ThreadGroup::_name_offset;
2060 int java_lang_ThreadGroup::_maxPriority_offset;
2061 int java_lang_ThreadGroup::_daemon_offset;
2062
2063 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
2064 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2065 return java_thread_group->obj_field(_parent_offset);
2066 }
2067
2068 // ("name as oop" accessor is not necessary)
2069
2070 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
2071 oop name = java_thread_group->obj_field(_name_offset);
2072 // ThreadGroup.name can be null
2073 if (name != nullptr) {
2074 return java_lang_String::as_utf8_string(name);
2075 }
2076 return nullptr;
2077 }
2078
2079 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
2080 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2081 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
2082 }
2083
2084 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
2085 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2086 return java_thread_group->bool_field(_daemon_offset) != 0;
2087 }
2088
2089 #define THREADGROUP_FIELDS_DO(macro) \
2090 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
2091 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
2092 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
2093 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false);
2094
2095 void java_lang_ThreadGroup::compute_offsets() {
2096 assert(_parent_offset == 0, "offsets should be initialized only once");
2097
2098 InstanceKlass* k = vmClasses::ThreadGroup_klass();
2099 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2100 }
2101
2102 #if INCLUDE_CDS
2103 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
2104 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2105 }
2106 #endif
2107
2108
2109 // java_lang_VirtualThread
2110
2111 int java_lang_VirtualThread::static_vthread_scope_offset;
2112 int java_lang_VirtualThread::_carrierThread_offset;
2113 int java_lang_VirtualThread::_continuation_offset;
2114 int java_lang_VirtualThread::_state_offset;
2115 int java_lang_VirtualThread::_next_offset;
2116 int java_lang_VirtualThread::_onWaitingList_offset;
2117 int java_lang_VirtualThread::_notified_offset;
2118 int java_lang_VirtualThread::_interruptible_wait_offset;
2119 int java_lang_VirtualThread::_timeout_offset;
2120 int java_lang_VirtualThread::_objectWaiter_offset;
2121
2122 #define VTHREAD_FIELDS_DO(macro) \
2123 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \
2124 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \
2125 macro(_continuation_offset, k, "cont", continuation_signature, false); \
2126 macro(_state_offset, k, "state", int_signature, false); \
2127 macro(_next_offset, k, "next", vthread_signature, false); \
2128 macro(_onWaitingList_offset, k, "onWaitingList", bool_signature, false); \
2129 macro(_notified_offset, k, "notified", bool_signature, false); \
2130 macro(_interruptible_wait_offset, k, "interruptableWait", bool_signature, false); \
2131 macro(_timeout_offset, k, "timeout", long_signature, false);
2132
2133
2134 void java_lang_VirtualThread::compute_offsets() {
2135 InstanceKlass* k = vmClasses::VirtualThread_klass();
2136 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2137 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2138 }
2139
2140 bool java_lang_VirtualThread::is_instance(oop obj) {
2141 return obj != nullptr && is_subclass(obj->klass());
2142 }
2143
2144 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
2145 oop thread = vthread->obj_field_acquire(_carrierThread_offset);
2146 return thread;
2147 }
2148
2149 oop java_lang_VirtualThread::continuation(oop vthread) {
2150 oop cont = vthread->obj_field(_continuation_offset);
2151 return cont;
2152 }
2153
2154 int java_lang_VirtualThread::state(oop vthread) {
2155 return vthread->int_field_acquire(_state_offset);
2156 }
2157
2158 void java_lang_VirtualThread::set_state(oop vthread, int state) {
2159 vthread->release_int_field_put(_state_offset, state);
2160 }
2161
2162 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) {
2163 jint* addr = vthread->field_addr<jint>(_state_offset);
2164 int res = AtomicAccess::cmpxchg(addr, old_state, new_state);
2165 return res;
2166 }
2167
2168 oop java_lang_VirtualThread::next(oop vthread) {
2169 return vthread->obj_field(_next_offset);
2170 }
2171
2172 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) {
2173 vthread->obj_field_put(_next_offset, next_vthread);
2174 }
2175
2176 // Add vthread to the waiting list if it's not already in it. Multiple threads
2177 // could be trying to add vthread to the list at the same time, so we control
2178 // access with a cmpxchg on onWaitingList. The winner adds vthread to the list.
2179 // Method returns true if we added vthread to the list, false otherwise.
2180 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) {
2181 jboolean* addr = vthread->field_addr<jboolean>(_onWaitingList_offset);
2182 jboolean vthread_on_list = AtomicAccess::load(addr);
2183 if (!vthread_on_list) {
2184 vthread_on_list = AtomicAccess::cmpxchg(addr, (jboolean)JNI_FALSE, (jboolean)JNI_TRUE);
2185 if (!vthread_on_list) {
2186 for (;;) {
2187 oop head = list_head.resolve();
2188 java_lang_VirtualThread::set_next(vthread, head);
2189 if (list_head.cmpxchg(head, vthread) == head) return true;
2190 }
2191 }
2192 }
2193 return false; // already on waiting list
2194 }
2195
2196 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) {
2197 vthread->bool_field_put_volatile(_notified_offset, value);
2198 }
2199
2200 void java_lang_VirtualThread::set_interruptible_wait(oop vthread, jboolean value) {
2201 vthread->bool_field_put_volatile(_interruptible_wait_offset, value);
2202 }
2203
2204 jlong java_lang_VirtualThread::timeout(oop vthread) {
2205 return vthread->long_field(_timeout_offset);
2206 }
2207
2208 void java_lang_VirtualThread::set_timeout(oop vthread, jlong value) {
2209 vthread->long_field_put(_timeout_offset, value);
2210 }
2211
2212 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2213 JavaThreadStatus status = JavaThreadStatus::NEW;
2214 switch (state & ~SUSPENDED) {
2215 case NEW:
2216 status = JavaThreadStatus::NEW;
2217 break;
2218 case STARTED:
2219 case RUNNING:
2220 case PARKING:
2221 case TIMED_PARKING:
2222 case UNPARKED:
2223 case YIELDING:
2224 case YIELDED:
2225 case UNBLOCKED:
2226 case WAITING:
2227 case TIMED_WAITING:
2228 status = JavaThreadStatus::RUNNABLE;
2229 break;
2230 case PARKED:
2231 case PINNED:
2232 status = JavaThreadStatus::PARKED;
2233 break;
2234 case TIMED_PARKED:
2235 case TIMED_PINNED:
2236 status = JavaThreadStatus::PARKED_TIMED;
2237 break;
2238 case BLOCKING:
2239 case BLOCKED:
2240 status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER;
2241 break;
2242 case WAIT:
2243 status = JavaThreadStatus::IN_OBJECT_WAIT;
2244 break;
2245 case TIMED_WAIT:
2246 status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED;
2247 break;
2248 case TERMINATED:
2249 status = JavaThreadStatus::TERMINATED;
2250 break;
2251 default:
2252 ShouldNotReachHere();
2253 }
2254 return status;
2255 }
2256
2257 ObjectMonitor* java_lang_VirtualThread::current_pending_monitor(oop vthread) {
2258 ObjectWaiter* waiter = objectWaiter(vthread);
2259 if (waiter != nullptr && waiter->at_monitorenter()) {
2260 return waiter->monitor();
2261 }
2262 return nullptr;
2263 }
2264
2265 ObjectMonitor* java_lang_VirtualThread::current_waiting_monitor(oop vthread) {
2266 ObjectWaiter* waiter = objectWaiter(vthread);
2267 if (waiter != nullptr && waiter->is_wait()) {
2268 return waiter->monitor();
2269 }
2270 return nullptr;
2271 }
2272
2273 bool java_lang_VirtualThread::is_preempted(oop vthread) {
2274 oop continuation = java_lang_VirtualThread::continuation(vthread);
2275 assert(continuation != nullptr, "vthread with no continuation");
2276 stackChunkOop chunk = jdk_internal_vm_Continuation::tail(continuation);
2277 return chunk != nullptr && chunk->preempted();
2278 }
2279
2280 #if INCLUDE_CDS
2281 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2282 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2283 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2284 }
2285 #endif
2286
2287 // java_lang_Throwable
2288
2289 int java_lang_Throwable::_backtrace_offset;
2290 int java_lang_Throwable::_detailMessage_offset;
2291 int java_lang_Throwable::_stackTrace_offset;
2292 int java_lang_Throwable::_depth_offset;
2293 int java_lang_Throwable::_cause_offset;
2294 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2295
2296 #define THROWABLE_FIELDS_DO(macro) \
2297 macro(_backtrace_offset, k, "backtrace", object_signature, false); \
2298 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \
2299 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2300 macro(_depth_offset, k, "depth", int_signature, false); \
2301 macro(_cause_offset, k, "cause", throwable_signature, false); \
2302 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2303
2304 void java_lang_Throwable::compute_offsets() {
2305 InstanceKlass* k = vmClasses::Throwable_klass();
2306 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2307 }
2308
2309 #if INCLUDE_CDS
2310 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2311 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2312 }
2313 #endif
2314
2315 oop java_lang_Throwable::unassigned_stacktrace() {
2316 InstanceKlass* ik = vmClasses::Throwable_klass();
2317 oop base = ik->static_field_base_raw();
2318 return base->obj_field(_static_unassigned_stacktrace_offset);
2319 }
2320
2321 oop java_lang_Throwable::backtrace(oop throwable) {
2322 return throwable->obj_field_acquire(_backtrace_offset);
2323 }
2324
2325
2326 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2327 throwable->release_obj_field_put(_backtrace_offset, value);
2328 }
2329
2330 int java_lang_Throwable::depth(oop throwable) {
2331 return throwable->int_field(_depth_offset);
2332 }
2333
2334 void java_lang_Throwable::set_depth(oop throwable, int value) {
2335 throwable->int_field_put(_depth_offset, value);
2336 }
2337
2338 oop java_lang_Throwable::message(oop throwable) {
2339 return throwable->obj_field(_detailMessage_offset);
2340 }
2341
2342 const char* java_lang_Throwable::message_as_utf8(oop throwable) {
2343 oop msg = java_lang_Throwable::message(throwable);
2344 const char* msg_utf8 = nullptr;
2345 if (msg != nullptr) {
2346 msg_utf8 = java_lang_String::as_utf8_string(msg);
2347 }
2348 return msg_utf8;
2349 }
2350
2351 oop java_lang_Throwable::cause(oop throwable) {
2352 return throwable->obj_field(_cause_offset);
2353 }
2354
2355 void java_lang_Throwable::set_message(oop throwable, oop value) {
2356 throwable->obj_field_put(_detailMessage_offset, value);
2357 }
2358
2359
2360 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2361 throwable->obj_field_put(_stackTrace_offset, st_element_array);
2362 }
2363
2364 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2365 set_stacktrace(throwable, nullptr);
2366 }
2367
2368
2369 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2370 ResourceMark rm;
2371 Klass* k = throwable->klass();
2372 assert(k != nullptr, "just checking");
2373 st->print("%s", k->external_name());
2374 oop msg = message(throwable);
2375 if (msg != nullptr) {
2376 st->print(": %s", java_lang_String::as_utf8_string(msg));
2377 }
2378 }
2379
2380 // After this many redefines, the stack trace is unreliable.
2381 const int MAX_VERSION = USHRT_MAX;
2382
2383 static inline bool version_matches(Method* method, int version) {
2384 assert(version < MAX_VERSION, "version is too big");
2385 return method != nullptr && (method->constants()->version() == version);
2386 }
2387
2388 // This class provides a simple wrapper over the internal structure of
2389 // exception backtrace to insulate users of the backtrace from needing
2390 // to know what it looks like.
2391 // The code of this class is not GC safe. Allocations can only happen
2392 // in expand().
2393 class BacktraceBuilder: public StackObj {
2394 friend class BacktraceIterator;
2395 private:
2396 Handle _backtrace;
2397 objArrayOop _head;
2398 typeArrayOop _methods;
2399 typeArrayOop _bcis;
2400 objArrayOop _mirrors;
2401 typeArrayOop _names; // Needed to insulate method name against redefinition.
2402 // True if the top frame of the backtrace is omitted because it shall be hidden.
2403 bool _has_hidden_top_frame;
2404 int _index;
2405 NoSafepointVerifier _nsv;
2406
2407 enum {
2408 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2409 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2410 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2411 trace_names_offset = java_lang_Throwable::trace_names_offset,
2412 trace_conts_offset = java_lang_Throwable::trace_conts_offset,
2413 trace_next_offset = java_lang_Throwable::trace_next_offset,
2414 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2415 trace_size = java_lang_Throwable::trace_size,
2416 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2417 };
2418
2419 // get info out of chunks
2420 static typeArrayOop get_methods(objArrayHandle chunk) {
2421 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2422 assert(methods != nullptr, "method array should be initialized in backtrace");
2423 return methods;
2424 }
2425 static typeArrayOop get_bcis(objArrayHandle chunk) {
2426 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2427 assert(bcis != nullptr, "bci array should be initialized in backtrace");
2428 return bcis;
2429 }
2430 static objArrayOop get_mirrors(objArrayHandle chunk) {
2431 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2432 assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2433 return mirrors;
2434 }
2435 static typeArrayOop get_names(objArrayHandle chunk) {
2436 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2437 assert(names != nullptr, "names array should be initialized in backtrace");
2438 return names;
2439 }
2440 static bool has_hidden_top_frame(objArrayHandle chunk) {
2441 oop hidden = chunk->obj_at(trace_hidden_offset);
2442 return hidden != nullptr;
2443 }
2444
2445 public:
2446
2447 // constructor for new backtrace
2448 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2449 expand(CHECK);
2450 _backtrace = Handle(THREAD, _head);
2451 _index = 0;
2452 }
2453
2454 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2455 _methods = get_methods(backtrace);
2456 _bcis = get_bcis(backtrace);
2457 _mirrors = get_mirrors(backtrace);
2458 _names = get_names(backtrace);
2459 _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2460 assert(_methods->length() == _bcis->length() &&
2461 _methods->length() == _mirrors->length() &&
2462 _mirrors->length() == _names->length(),
2463 "method and source information arrays should match");
2464
2465 // head is the preallocated backtrace
2466 _head = backtrace();
2467 _backtrace = Handle(thread, _head);
2468 _index = 0;
2469 }
2470
2471 void expand(TRAPS) {
2472 objArrayHandle old_head(THREAD, _head);
2473 PauseNoSafepointVerifier pnsv(&_nsv);
2474
2475 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2476 objArrayHandle new_head(THREAD, head);
2477
2478 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2479 typeArrayHandle new_methods(THREAD, methods);
2480
2481 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2482 typeArrayHandle new_bcis(THREAD, bcis);
2483
2484 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2485 objArrayHandle new_mirrors(THREAD, mirrors);
2486
2487 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2488 typeArrayHandle new_names(THREAD, names);
2489
2490 if (!old_head.is_null()) {
2491 old_head->obj_at_put(trace_next_offset, new_head());
2492 }
2493 new_head->obj_at_put(trace_methods_offset, new_methods());
2494 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2495 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2496 new_head->obj_at_put(trace_names_offset, new_names());
2497 new_head->obj_at_put(trace_hidden_offset, nullptr);
2498
2499 _head = new_head();
2500 _methods = new_methods();
2501 _bcis = new_bcis();
2502 _mirrors = new_mirrors();
2503 _names = new_names();
2504 _index = 0;
2505 }
2506
2507 oop backtrace() {
2508 return _backtrace();
2509 }
2510
2511 inline void push(Method* method, int bci, TRAPS) {
2512 // Smear the -1 bci to 0 since the array only holds unsigned
2513 // shorts. The later line number lookup would just smear the -1
2514 // to a 0 even if it could be recorded.
2515 if (bci == SynchronizationEntryBCI) bci = 0;
2516
2517 if (_index >= trace_chunk_size) {
2518 methodHandle mhandle(THREAD, method);
2519 expand(CHECK);
2520 method = mhandle();
2521 }
2522
2523 _methods->ushort_at_put(_index, method->orig_method_idnum());
2524 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2525
2526 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2527 // klass owning the symbols alive so their refcounts aren't decremented.
2528 Symbol* name = method->name();
2529 _names->symbol_at_put(_index, name);
2530
2531 // We need to save the mirrors in the backtrace to keep the class
2532 // from being unloaded while we still have this stack trace.
2533 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2534 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2535
2536 _index++;
2537 }
2538
2539 void set_has_hidden_top_frame() {
2540 if (!_has_hidden_top_frame) {
2541 // It would be nice to add java/lang/Boolean::TRUE here
2542 // to indicate that this backtrace has a hidden top frame.
2543 // But this code is used before TRUE is allocated.
2544 // Therefore let's just use an arbitrary legal oop
2545 // available right here. _methods is a short[].
2546 assert(_methods != nullptr, "we need a legal oop");
2547 _has_hidden_top_frame = true;
2548 _head->obj_at_put(trace_hidden_offset, _methods);
2549 }
2550 }
2551 };
2552
2553 struct BacktraceElement : public StackObj {
2554 int _method_id;
2555 int _bci;
2556 int _version;
2557 Symbol* _name;
2558 Handle _mirror;
2559 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2560 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2561 };
2562
2563 class BacktraceIterator : public StackObj {
2564 int _index;
2565 objArrayHandle _result;
2566 objArrayHandle _mirrors;
2567 typeArrayHandle _methods;
2568 typeArrayHandle _bcis;
2569 typeArrayHandle _names;
2570
2571 void init(objArrayHandle result, Thread* thread) {
2572 // Get method id, bci, version and mirror from chunk
2573 _result = result;
2574 if (_result.not_null()) {
2575 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2576 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2577 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2578 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2579 _index = 0;
2580 }
2581 }
2582 public:
2583 BacktraceIterator(objArrayHandle result, Thread* thread) {
2584 init(result, thread);
2585 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2586 }
2587
2588 BacktraceElement next(Thread* thread) {
2589 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2590 _methods->ushort_at(_index),
2591 Backtrace::version_at(_bcis->int_at(_index)),
2592 Backtrace::bci_at(_bcis->int_at(_index)),
2593 _names->symbol_at(_index));
2594 _index++;
2595
2596 if (_index >= java_lang_Throwable::trace_chunk_size) {
2597 int next_offset = java_lang_Throwable::trace_next_offset;
2598 // Get next chunk
2599 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2600 init(result, thread);
2601 }
2602 return e;
2603 }
2604
2605 bool repeat() {
2606 return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2607 }
2608 };
2609
2610
2611 // Print stack trace element to the specified output stream.
2612 // The output is formatted into a stringStream and written to the outputStream in one step.
2613 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2614 int version, int bci, Symbol* name) {
2615 ResourceMark rm;
2616 stringStream ss;
2617
2618 InstanceKlass* holder = java_lang_Class::as_InstanceKlass(mirror());
2619 const char* klass_name = holder->external_name();
2620 char* method_name = name->as_C_string();
2621 ss.print("\tat %s.%s(", klass_name, method_name);
2622
2623 // Print module information
2624 ModuleEntry* module = holder->module();
2625 if (module->is_named()) {
2626 char* module_name = module->name()->as_C_string();
2627 if (module->version() != nullptr) {
2628 char* module_version = module->version()->as_C_string();
2629 ss.print("%s@%s/", module_name, module_version);
2630 } else {
2631 ss.print("%s/", module_name);
2632 }
2633 }
2634
2635 char* source_file_name = nullptr;
2636 Symbol* source = Backtrace::get_source_file_name(holder, version);
2637 if (source != nullptr) {
2638 source_file_name = source->as_C_string();
2639 }
2640
2641 // The method can be null if the requested class version is gone
2642 Method* method = holder->method_with_orig_idnum(method_id, version);
2643 if (!version_matches(method, version)) {
2644 ss.print("Redefined)");
2645 } else {
2646 int line_number = Backtrace::get_line_number(method, bci);
2647 if (line_number == -2) {
2648 ss.print("Native Method)");
2649 } else {
2650 if (source_file_name != nullptr && (line_number != -1)) {
2651 // Sourcename and linenumber
2652 ss.print("%s:%d)", source_file_name, line_number);
2653 } else if (source_file_name != nullptr) {
2654 // Just sourcename
2655 ss.print("%s)", source_file_name);
2656 } else {
2657 // Neither sourcename nor linenumber
2658 ss.print("Unknown Source)");
2659 }
2660 nmethod* nm = method->code();
2661 if (WizardMode && nm != nullptr) {
2662 ss.print("(nmethod " INTPTR_FORMAT ")", p2i(nm));
2663 }
2664 }
2665 }
2666
2667 ss.cr();
2668 st->print_raw(ss.freeze(), ss.size());
2669 }
2670
2671 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2672 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2673 int method_id = method->orig_method_idnum();
2674 int version = method->constants()->version();
2675 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2676 }
2677
2678 /**
2679 * Print the throwable message and its stack trace plus all causes by walking the
2680 * cause chain. The output looks the same as of Throwable.printStackTrace().
2681 */
2682 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2683 // First, print the message.
2684 print(throwable(), st);
2685 st->cr();
2686
2687 // Now print the stack trace.
2688 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2689 while (throwable.not_null()) {
2690 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2691 if (result.is_null()) {
2692 st->print_raw_cr("\t<<no stack trace available>>");
2693 return;
2694 }
2695 BacktraceIterator iter(result, THREAD);
2696
2697 while (iter.repeat()) {
2698 BacktraceElement bte = iter.next(THREAD);
2699 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2700 }
2701 if (THREAD->can_call_java()) {
2702 // Call getCause() which doesn't necessarily return the _cause field.
2703 ExceptionMark em(THREAD);
2704 JavaValue cause(T_OBJECT);
2705 JavaCalls::call_virtual(&cause,
2706 throwable,
2707 throwable->klass(),
2708 vmSymbols::getCause_name(),
2709 vmSymbols::void_throwable_signature(),
2710 THREAD);
2711 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2712 if (HAS_PENDING_EXCEPTION) {
2713 CLEAR_PENDING_EXCEPTION;
2714 throwable = Handle();
2715 } else {
2716 throwable = Handle(THREAD, cause.get_oop());
2717 if (throwable.not_null()) {
2718 st->print("Caused by: ");
2719 print(throwable(), st);
2720 st->cr();
2721 }
2722 }
2723 } else {
2724 st->print_raw_cr("<<cannot call Java to get cause>>");
2725 return;
2726 }
2727 }
2728 }
2729
2730 /**
2731 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2732 */
2733 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2734 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2735 JavaValue result(T_VOID);
2736 JavaCalls::call_virtual(&result,
2737 throwable,
2738 vmClasses::Throwable_klass(),
2739 vmSymbols::printStackTrace_name(),
2740 vmSymbols::void_method_signature(),
2741 THREAD);
2742 }
2743
2744 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2745 if (!StackTraceInThrowable) return;
2746 ResourceMark rm(THREAD);
2747
2748 // Start out by clearing the backtrace for this object, in case the VM
2749 // runs out of memory while allocating the stack trace
2750 set_backtrace(throwable(), nullptr);
2751 // Clear lazily constructed Java level stacktrace if refilling occurs
2752 // This is unnecessary in 1.7+ but harmless
2753 clear_stacktrace(throwable());
2754
2755 int max_depth = MaxJavaStackTraceDepth;
2756 JavaThread* thread = THREAD;
2757
2758 BacktraceBuilder bt(CHECK);
2759
2760 // If there is no Java frame just return the method that was being called
2761 // with bci 0
2762 if (!thread->has_last_Java_frame()) {
2763 if (max_depth >= 1 && method() != nullptr) {
2764 bt.push(method(), 0, CHECK);
2765 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2766 set_depth(throwable(), 1);
2767 set_backtrace(throwable(), bt.backtrace());
2768 }
2769 return;
2770 }
2771
2772 // Instead of using vframe directly, this version of fill_in_stack_trace
2773 // basically handles everything by hand. This significantly improved the
2774 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2775 // See bug 6333838 for more details.
2776 // The "ASSERT" here is to verify this method generates the exactly same stack
2777 // trace as utilizing vframe.
2778 #ifdef ASSERT
2779 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2780 #endif
2781 int total_count = 0;
2782 RegisterMap map(thread,
2783 RegisterMap::UpdateMap::skip,
2784 RegisterMap::ProcessFrames::skip,
2785 RegisterMap::WalkContinuation::include);
2786 int decode_offset = 0;
2787 nmethod* nm = nullptr;
2788 bool skip_fillInStackTrace_check = false;
2789 bool skip_throwableInit_check = false;
2790 bool skip_hidden = !ShowHiddenFrames;
2791 bool show_carrier = ShowCarrierFrames;
2792 ContinuationEntry* cont_entry = thread->last_continuation();
2793 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2794 Method* method = nullptr;
2795 int bci = 0;
2796
2797 // Compiled java method case.
2798 if (decode_offset != 0) {
2799 DebugInfoReadStream stream(nm, decode_offset);
2800 decode_offset = stream.read_int();
2801 method = (Method*)nm->metadata_at(stream.read_int());
2802 bci = stream.read_bci();
2803 } else {
2804 if (fr.is_first_frame()) break;
2805
2806 if (Continuation::is_continuation_enterSpecial(fr)) {
2807 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2808 if (!show_carrier && cont_entry->is_virtual_thread()) {
2809 break;
2810 }
2811 cont_entry = cont_entry->parent();
2812 }
2813
2814 address pc = fr.pc();
2815 if (fr.is_interpreted_frame()) {
2816 address bcp;
2817 if (!map.in_cont()) {
2818 bcp = fr.interpreter_frame_bcp();
2819 method = fr.interpreter_frame_method();
2820 } else {
2821 bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2822 method = map.stack_chunk()->interpreter_frame_method(fr);
2823 }
2824 bci = method->bci_from(bcp);
2825 fr = fr.sender(&map);
2826 } else {
2827 CodeBlob* cb = fr.cb();
2828 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2829 // but non nmethod
2830 fr = fr.sender(&map);
2831 if (cb == nullptr || !cb->is_nmethod()) {
2832 continue;
2833 }
2834 nm = cb->as_nmethod();
2835 assert(nm->method() != nullptr, "must be");
2836 if (nm->method()->is_native()) {
2837 method = nm->method();
2838 bci = 0;
2839 } else {
2840 PcDesc* pd = nm->pc_desc_at(pc);
2841 decode_offset = pd->scope_decode_offset();
2842 // if decode_offset is not equal to 0, it will execute the
2843 // "compiled java method case" at the beginning of the loop.
2844 continue;
2845 }
2846 }
2847 }
2848 #ifdef ASSERT
2849 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2850 assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2851 st.next();
2852 }
2853 #endif
2854
2855 // the format of the stacktrace will be:
2856 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2857 // - 0 or more <init> methods for the exception class (skipped)
2858 // - rest of the stack
2859
2860 if (!skip_fillInStackTrace_check) {
2861 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2862 throwable->is_a(method->method_holder())) {
2863 continue;
2864 }
2865 else {
2866 skip_fillInStackTrace_check = true; // gone past them all
2867 }
2868 }
2869 if (!skip_throwableInit_check) {
2870 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2871
2872 // skip <init> methods of the exception class and superclasses
2873 // This is similar to classic VM.
2874 if (method->name() == vmSymbols::object_initializer_name() &&
2875 throwable->is_a(method->method_holder())) {
2876 continue;
2877 } else {
2878 // there are none or we've seen them all - either way stop checking
2879 skip_throwableInit_check = true;
2880 }
2881 }
2882 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2883 if (skip_hidden) {
2884 if (total_count == 0) {
2885 // The top frame will be hidden from the stack trace.
2886 bt.set_has_hidden_top_frame();
2887 }
2888 continue;
2889 }
2890 }
2891
2892 bt.push(method, bci, CHECK);
2893 total_count++;
2894 }
2895
2896 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2897
2898 // Put completed stack trace into throwable object
2899 set_backtrace(throwable(), bt.backtrace());
2900 set_depth(throwable(), total_count);
2901 }
2902
2903 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2904 // No-op if stack trace is disabled
2905 if (!StackTraceInThrowable) {
2906 return;
2907 }
2908
2909 // Disable stack traces for some preallocated out of memory errors
2910 if (!Universe::should_fill_in_stack_trace(throwable)) {
2911 return;
2912 }
2913
2914 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2915 PreserveExceptionMark pm(THREAD);
2916
2917 fill_in_stack_trace(throwable, method, THREAD);
2918 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2919 // original exception via the PreserveExceptionMark destructor.
2920 CLEAR_PENDING_EXCEPTION;
2921 }
2922
2923 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2924 // Allocate stack trace - backtrace is created but not filled in
2925
2926 // No-op if stack trace is disabled
2927 if (!StackTraceInThrowable) return;
2928 BacktraceBuilder bt(CHECK); // creates a backtrace
2929 set_backtrace(throwable(), bt.backtrace());
2930 }
2931
2932
2933 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2934 // Fill in stack trace into preallocated backtrace (no GC)
2935
2936 // No-op if stack trace is disabled
2937 if (!StackTraceInThrowable) return;
2938
2939 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2940
2941 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2942
2943 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2944 assert(backtrace.not_null(), "backtrace should have been preallocated");
2945
2946 ResourceMark rm(THREAD);
2947 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2948
2949 BacktraceBuilder bt(THREAD, backtrace);
2950
2951 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2952 // methods as preallocated errors aren't created by "java" code.
2953
2954 // fill in as much stack trace as possible
2955 int chunk_count = 0;
2956 for (;!st.at_end(); st.next()) {
2957 bt.push(st.method(), st.bci(), CHECK);
2958 chunk_count++;
2959
2960 // Bail-out for deep stacks
2961 if (chunk_count >= trace_chunk_size) break;
2962 }
2963 set_depth(throwable(), chunk_count);
2964 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2965
2966 // We support the Throwable immutability protocol defined for Java 7.
2967 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2968 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2969 }
2970
2971 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2972 objArrayHandle stack_trace_array_h, TRAPS) {
2973
2974 if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2975 THROW(vmSymbols::java_lang_NullPointerException());
2976 }
2977
2978 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2979
2980 if (stack_trace_array_h->length() != depth) {
2981 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2982 }
2983
2984 objArrayHandle result(THREAD, objArrayOop(backtrace()));
2985 BacktraceIterator iter(result, THREAD);
2986
2987 int index = 0;
2988 while (iter.repeat()) {
2989 BacktraceElement bte = iter.next(THREAD);
2990
2991 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2992
2993 if (stack_trace_element.is_null()) {
2994 THROW(vmSymbols::java_lang_NullPointerException());
2995 }
2996
2997 InstanceKlass* holder = java_lang_Class::as_InstanceKlass(bte._mirror());
2998 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2999
3000 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
3001 method,
3002 bte._version,
3003 bte._bci,
3004 bte._name,
3005 CHECK);
3006 }
3007 }
3008
3009 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
3010 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
3011 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
3012 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
3013 // symbolic stacktrace of 'throwable'.
3014 assert(throwable.not_null(), "shouldn't be");
3015
3016 // Now create the message from the original exception and thread name.
3017 ResourceMark rm(current);
3018 const char *message = nullptr;
3019 oop detailed_message = java_lang_Throwable::message(throwable());
3020 if (detailed_message != nullptr) {
3021 message = java_lang_String::as_utf8_string(detailed_message);
3022 }
3023 stringStream st;
3024 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
3025 message == nullptr ? "" : ":");
3026 if (message == nullptr) {
3027 st.print("[in thread \"%s\"]", current->name());
3028 } else {
3029 st.print("%s [in thread \"%s\"]", message, current->name());
3030 }
3031
3032 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
3033 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
3034 // If new_exception returns a different exception while creating the exception,
3035 // abandon the attempt to save the initialization error and return null.
3036 if (init_error->klass()->name() != exception_name) {
3037 log_info(class, init)("Exception %s thrown while saving initialization exception",
3038 init_error->klass()->external_name());
3039 return Handle();
3040 }
3041
3042 // Call to java to fill in the stack trace and clear declaringClassObject to
3043 // not keep classes alive in the stack trace.
3044 // call this: public StackTraceElement[] getStackTrace()
3045 JavaValue result(T_ARRAY);
3046 JavaCalls::call_virtual(&result, throwable,
3047 vmClasses::Throwable_klass(),
3048 vmSymbols::getStackTrace_name(),
3049 vmSymbols::getStackTrace_signature(),
3050 current);
3051 if (!current->has_pending_exception()){
3052 Handle stack_trace(current, result.get_oop());
3053 assert(stack_trace->is_objArray(), "Should be an array");
3054 java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
3055 // Clear backtrace because the stacktrace should be used instead.
3056 set_backtrace(init_error(), nullptr);
3057 } else {
3058 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
3059 init_error->klass()->external_name());
3060 current->clear_pending_exception();
3061 }
3062
3063 return init_error;
3064 }
3065
3066 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
3067 JavaThread* current = JavaThread::current();
3068 objArrayHandle result(current, objArrayOop(backtrace(throwable)));
3069 BacktraceIterator iter(result, current);
3070 // No backtrace available.
3071 if (!iter.repeat()) return false;
3072
3073 // If the exception happened in a frame that has been hidden, i.e.,
3074 // omitted from the back trace, we can not compute the message.
3075 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
3076 if (hidden != nullptr) {
3077 return false;
3078 }
3079
3080 // Get first backtrace element.
3081 BacktraceElement bte = iter.next(current);
3082
3083 InstanceKlass* holder = java_lang_Class::as_InstanceKlass(bte._mirror());
3084 assert(holder != nullptr, "first element should be non-null");
3085 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
3086
3087 // Original version is no longer available.
3088 if (m == nullptr || !version_matches(m, bte._version)) {
3089 return false;
3090 }
3091
3092 *method = m;
3093 *bci = bte._bci;
3094 return true;
3095 }
3096
3097 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
3098 // Allocate java.lang.StackTraceElement instance
3099 InstanceKlass* k = vmClasses::StackTraceElement_klass();
3100 assert(k != nullptr, "must be loaded in 1.4+");
3101 if (k->should_be_initialized()) {
3102 k->initialize(CHECK_NULL);
3103 }
3104
3105 Handle element = k->allocate_instance_handle(CHECK_NULL);
3106
3107 int version = method->constants()->version();
3108 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
3109 return element();
3110 }
3111
3112 void java_lang_StackTraceElement::fill_in(Handle element,
3113 InstanceKlass* holder, const methodHandle& method,
3114 int version, int bci, Symbol* name, TRAPS) {
3115 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
3116
3117 ResourceMark rm(THREAD);
3118 HandleMark hm(THREAD);
3119
3120 // Fill in class name
3121 Handle java_class(THREAD, holder->java_mirror());
3122 oop classname = java_lang_Class::name(java_class, CHECK);
3123 java_lang_StackTraceElement::set_declaringClass(element(), classname);
3124 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
3125
3126 oop loader = holder->class_loader();
3127 if (loader != nullptr) {
3128 oop loader_name = java_lang_ClassLoader::name(loader);
3129 if (loader_name != nullptr)
3130 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
3131 }
3132
3133 // Fill in method name
3134 oop methodname = StringTable::intern(name, CHECK);
3135 java_lang_StackTraceElement::set_methodName(element(), methodname);
3136
3137 // Fill in module name and version
3138 ModuleEntry* module = holder->module();
3139 if (module->is_named()) {
3140 oop module_name = StringTable::intern(module->name(), CHECK);
3141 java_lang_StackTraceElement::set_moduleName(element(), module_name);
3142 oop module_version;
3143 if (module->version() != nullptr) {
3144 module_version = StringTable::intern(module->version(), CHECK);
3145 } else {
3146 module_version = nullptr;
3147 }
3148 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
3149 }
3150
3151 if (method() == nullptr || !version_matches(method(), version)) {
3152 // The method was redefined, accurate line number information isn't available
3153 java_lang_StackTraceElement::set_fileName(element(), nullptr);
3154 java_lang_StackTraceElement::set_lineNumber(element(), -1);
3155 } else {
3156 Symbol* source;
3157 oop source_file;
3158 int line_number;
3159 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
3160
3161 java_lang_StackTraceElement::set_fileName(element(), source_file);
3162 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
3163 }
3164 }
3165
3166 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
3167 InstanceKlass* holder,
3168 int version,
3169 const methodHandle& method,
3170 int bci,
3171 Symbol*& source,
3172 oop& source_file,
3173 int& line_number, TRAPS) {
3174 // Fill in source file name and line number.
3175 source = Backtrace::get_source_file_name(holder, version);
3176 source_file = java_lang_Class::source_file(java_class());
3177 if (source != nullptr) {
3178 // Class was not redefined. We can trust its cache if set,
3179 // else we have to initialize it.
3180 if (source_file == nullptr) {
3181 source_file = StringTable::intern(source, CHECK);
3182 java_lang_Class::set_source_file(java_class(), source_file);
3183 }
3184 } else {
3185 // Class was redefined. Dump the cache if it was set.
3186 if (source_file != nullptr) {
3187 source_file = nullptr;
3188 java_lang_Class::set_source_file(java_class(), source_file);
3189 }
3190 }
3191 line_number = Backtrace::get_line_number(method(), bci);
3192 }
3193
3194 #if INCLUDE_JVMCI
3195 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
3196 Symbol*& filename, int& line_number, TRAPS) {
3197 ResourceMark rm(THREAD);
3198 HandleMark hm(THREAD);
3199
3200 filename = nullptr;
3201 line_number = -1;
3202
3203 oop source_file;
3204 int version = method->constants()->version();
3205 InstanceKlass* holder = method->method_holder();
3206 Handle java_class(THREAD, holder->java_mirror());
3207 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
3208 }
3209 #endif // INCLUDE_JVMCI
3210
3211 // java_lang_ClassFrameInfo
3212
3213 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
3214 int java_lang_ClassFrameInfo::_flags_offset;
3215
3216 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
3217 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \
3218 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false)
3219
3220 void java_lang_ClassFrameInfo::compute_offsets() {
3221 InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
3222 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3223 }
3224
3225 #if INCLUDE_CDS
3226 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
3227 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3228 }
3229 #endif
3230
3231 static int get_flags(const methodHandle& m) {
3232 int flags = m->access_flags().as_method_flags();
3233 if (m->is_object_initializer()) {
3234 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR;
3235 } else {
3236 // Note: Static initializers can be here. Record them as plain methods.
3237 flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
3238 }
3239 if (m->caller_sensitive()) {
3240 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
3241 }
3242 if (m->is_hidden()) {
3243 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3244 }
3245 assert((flags & 0xFF000000) == 0, "unexpected flags");
3246 return flags;
3247 }
3248
3249 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3250 return obj->obj_field(_classOrMemberName_offset);
3251 }
3252
3253 int java_lang_ClassFrameInfo::flags(oop obj) {
3254 return obj->int_field(_flags_offset);
3255 }
3256
3257 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3258 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3259 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3260 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3261 stackFrame->int_field_put(_flags_offset, flags);
3262 }
3263
3264 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3265 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3266 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3267 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3268 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3269 stackFrame->int_field_put(_flags_offset, flags);
3270 }
3271
3272
3273 // java_lang_StackFrameInfo
3274
3275 int java_lang_StackFrameInfo::_type_offset;
3276 int java_lang_StackFrameInfo::_name_offset;
3277 int java_lang_StackFrameInfo::_bci_offset;
3278 int java_lang_StackFrameInfo::_version_offset;
3279 int java_lang_StackFrameInfo::_contScope_offset;
3280
3281 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3282 macro(_type_offset, k, "type", object_signature, false); \
3283 macro(_name_offset, k, "name", string_signature, false); \
3284 macro(_bci_offset, k, "bci", int_signature, false); \
3285 macro(_contScope_offset, k, "contScope", continuationscope_signature, false)
3286
3287 void java_lang_StackFrameInfo::compute_offsets() {
3288 InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3289 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3290 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3291 }
3292
3293 #if INCLUDE_CDS
3294 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3295 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3296 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3297 }
3298 #endif
3299
3300 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3301 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3302 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3303 return method;
3304 }
3305
3306 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3307 // set Method* or mid/cpref
3308 HandleMark hm(THREAD);
3309 Handle cont_h(THREAD, cont);
3310 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3311
3312 // set bci
3313 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3314 // method may be redefined; store the version
3315 int version = method->constants()->version();
3316 assert((jushort)version == version, "version should be short");
3317 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3318
3319 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3320 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3321 }
3322
3323 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3324 ResourceMark rm(THREAD);
3325 HandleMark hm(THREAD);
3326
3327 Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3328 InstanceKlass* holder = method->method_holder();
3329 short version = stackFrame->short_field(_version_offset);
3330 int bci = stackFrame->int_field(_bci_offset);
3331 Symbol* name = method->name();
3332 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3333 }
3334
3335 oop java_lang_StackFrameInfo::type(oop obj) {
3336 return obj->obj_field(_type_offset);
3337 }
3338
3339 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3340 obj->obj_field_put(_type_offset, value);
3341 }
3342
3343 oop java_lang_StackFrameInfo::name(oop obj) {
3344 return obj->obj_field(_name_offset);
3345 }
3346
3347 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3348 obj->obj_field_put(_name_offset, value);
3349 }
3350
3351 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3352 obj->short_field_put(_version_offset, value);
3353 }
3354
3355 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3356 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3357 obj->int_field_put(_bci_offset, value);
3358 }
3359
3360 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3361 obj->obj_field_put(_contScope_offset, value);
3362 }
3363
3364 int java_lang_LiveStackFrameInfo::_monitors_offset;
3365 int java_lang_LiveStackFrameInfo::_locals_offset;
3366 int java_lang_LiveStackFrameInfo::_operands_offset;
3367 int java_lang_LiveStackFrameInfo::_mode_offset;
3368
3369 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3370 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
3371 macro(_locals_offset, k, "locals", object_array_signature, false); \
3372 macro(_operands_offset, k, "operands", object_array_signature, false); \
3373 macro(_mode_offset, k, "mode", int_signature, false)
3374
3375 void java_lang_LiveStackFrameInfo::compute_offsets() {
3376 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3377 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3378 }
3379
3380 #if INCLUDE_CDS
3381 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3382 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3383 }
3384 #endif
3385
3386 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3387 obj->obj_field_put(_monitors_offset, value);
3388 }
3389
3390 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3391 obj->obj_field_put(_locals_offset, value);
3392 }
3393
3394 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3395 obj->obj_field_put(_operands_offset, value);
3396 }
3397
3398 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3399 obj->int_field_put(_mode_offset, value);
3400 }
3401
3402
3403 // java_lang_AccessibleObject
3404
3405 int java_lang_reflect_AccessibleObject::_override_offset;
3406
3407 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3408 macro(_override_offset, k, "override", bool_signature, false)
3409
3410 void java_lang_reflect_AccessibleObject::compute_offsets() {
3411 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3412 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3413 }
3414
3415 #if INCLUDE_CDS
3416 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3417 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3418 }
3419 #endif
3420
3421 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3422 return (jboolean) reflect->bool_field(_override_offset);
3423 }
3424
3425 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3426 reflect->bool_field_put(_override_offset, (int) value);
3427 }
3428
3429 // java_lang_reflect_Method
3430
3431 int java_lang_reflect_Method::_clazz_offset;
3432 int java_lang_reflect_Method::_name_offset;
3433 int java_lang_reflect_Method::_returnType_offset;
3434 int java_lang_reflect_Method::_parameterTypes_offset;
3435 int java_lang_reflect_Method::_exceptionTypes_offset;
3436 int java_lang_reflect_Method::_slot_offset;
3437 int java_lang_reflect_Method::_modifiers_offset;
3438 int java_lang_reflect_Method::_signature_offset;
3439 int java_lang_reflect_Method::_annotations_offset;
3440 int java_lang_reflect_Method::_parameter_annotations_offset;
3441 int java_lang_reflect_Method::_annotation_default_offset;
3442
3443 #define METHOD_FIELDS_DO(macro) \
3444 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3445 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3446 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
3447 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3448 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3449 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3450 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3451 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3452 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3453 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3454 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
3455
3456 void java_lang_reflect_Method::compute_offsets() {
3457 InstanceKlass* k = vmClasses::reflect_Method_klass();
3458 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3459 }
3460
3461 #if INCLUDE_CDS
3462 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3463 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3464 }
3465 #endif
3466
3467 Handle java_lang_reflect_Method::create(TRAPS) {
3468 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3469 InstanceKlass* klass = vmClasses::reflect_Method_klass();
3470 // This class is eagerly initialized during VM initialization, since we keep a reference
3471 // to one of the methods
3472 assert(klass->is_initialized(), "must be initialized");
3473 return klass->allocate_instance_handle(THREAD);
3474 }
3475
3476 oop java_lang_reflect_Method::clazz(oop reflect) {
3477 return reflect->obj_field(_clazz_offset);
3478 }
3479
3480 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3481 reflect->obj_field_put(_clazz_offset, value);
3482 }
3483
3484 int java_lang_reflect_Method::slot(oop reflect) {
3485 return reflect->int_field(_slot_offset);
3486 }
3487
3488 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3489 reflect->int_field_put(_slot_offset, value);
3490 }
3491
3492 void java_lang_reflect_Method::set_name(oop method, oop value) {
3493 method->obj_field_put(_name_offset, value);
3494 }
3495
3496 oop java_lang_reflect_Method::return_type(oop method) {
3497 return method->obj_field(_returnType_offset);
3498 }
3499
3500 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3501 method->obj_field_put(_returnType_offset, value);
3502 }
3503
3504 oop java_lang_reflect_Method::parameter_types(oop method) {
3505 return method->obj_field(_parameterTypes_offset);
3506 }
3507
3508 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3509 method->obj_field_put(_parameterTypes_offset, value);
3510 }
3511
3512 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3513 method->obj_field_put(_exceptionTypes_offset, value);
3514 }
3515
3516 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3517 method->int_field_put(_modifiers_offset, value);
3518 }
3519
3520 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3521 method->obj_field_put(_signature_offset, value);
3522 }
3523
3524 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3525 method->obj_field_put(_annotations_offset, value);
3526 }
3527
3528 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3529 method->obj_field_put(_parameter_annotations_offset, value);
3530 }
3531
3532 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3533 method->obj_field_put(_annotation_default_offset, value);
3534 }
3535
3536 int java_lang_reflect_Constructor::_clazz_offset;
3537 int java_lang_reflect_Constructor::_parameterTypes_offset;
3538 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3539 int java_lang_reflect_Constructor::_slot_offset;
3540 int java_lang_reflect_Constructor::_modifiers_offset;
3541 int java_lang_reflect_Constructor::_signature_offset;
3542 int java_lang_reflect_Constructor::_annotations_offset;
3543 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3544
3545 #define CONSTRUCTOR_FIELDS_DO(macro) \
3546 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3547 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3548 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3549 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3550 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3551 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3552 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3553 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3554
3555 void java_lang_reflect_Constructor::compute_offsets() {
3556 InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3557 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3558 }
3559
3560 #if INCLUDE_CDS
3561 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3562 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3563 }
3564 #endif
3565
3566 Handle java_lang_reflect_Constructor::create(TRAPS) {
3567 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3568 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3569 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3570 InstanceKlass* ik = InstanceKlass::cast(k);
3571 // Ensure it is initialized
3572 ik->initialize(CHECK_NH);
3573 return ik->allocate_instance_handle(THREAD);
3574 }
3575
3576 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3577 return reflect->obj_field(_clazz_offset);
3578 }
3579
3580 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3581 reflect->obj_field_put(_clazz_offset, value);
3582 }
3583
3584 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3585 return constructor->obj_field(_parameterTypes_offset);
3586 }
3587
3588 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3589 constructor->obj_field_put(_parameterTypes_offset, value);
3590 }
3591
3592 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3593 constructor->obj_field_put(_exceptionTypes_offset, value);
3594 }
3595
3596 int java_lang_reflect_Constructor::slot(oop reflect) {
3597 return reflect->int_field(_slot_offset);
3598 }
3599
3600 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3601 reflect->int_field_put(_slot_offset, value);
3602 }
3603
3604 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3605 constructor->int_field_put(_modifiers_offset, value);
3606 }
3607
3608 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3609 constructor->obj_field_put(_signature_offset, value);
3610 }
3611
3612 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3613 constructor->obj_field_put(_annotations_offset, value);
3614 }
3615
3616 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3617 method->obj_field_put(_parameter_annotations_offset, value);
3618 }
3619
3620 int java_lang_reflect_Field::_clazz_offset;
3621 int java_lang_reflect_Field::_name_offset;
3622 int java_lang_reflect_Field::_type_offset;
3623 int java_lang_reflect_Field::_slot_offset;
3624 int java_lang_reflect_Field::_modifiers_offset;
3625 int java_lang_reflect_Field::_trusted_final_offset;
3626 int java_lang_reflect_Field::_signature_offset;
3627 int java_lang_reflect_Field::_annotations_offset;
3628
3629 #define FIELD_FIELDS_DO(macro) \
3630 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3631 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3632 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \
3633 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3634 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3635 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \
3636 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3637 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3638
3639 void java_lang_reflect_Field::compute_offsets() {
3640 InstanceKlass* k = vmClasses::reflect_Field_klass();
3641 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3642 }
3643
3644 #if INCLUDE_CDS
3645 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3646 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3647 }
3648 #endif
3649
3650 Handle java_lang_reflect_Field::create(TRAPS) {
3651 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3652 Symbol* name = vmSymbols::java_lang_reflect_Field();
3653 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3654 InstanceKlass* ik = InstanceKlass::cast(k);
3655 // Ensure it is initialized
3656 ik->initialize(CHECK_NH);
3657 return ik->allocate_instance_handle(THREAD);
3658 }
3659
3660 oop java_lang_reflect_Field::clazz(oop reflect) {
3661 return reflect->obj_field(_clazz_offset);
3662 }
3663
3664 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3665 reflect->obj_field_put(_clazz_offset, value);
3666 }
3667
3668 oop java_lang_reflect_Field::name(oop field) {
3669 return field->obj_field(_name_offset);
3670 }
3671
3672 void java_lang_reflect_Field::set_name(oop field, oop value) {
3673 field->obj_field_put(_name_offset, value);
3674 }
3675
3676 oop java_lang_reflect_Field::type(oop field) {
3677 return field->obj_field(_type_offset);
3678 }
3679
3680 void java_lang_reflect_Field::set_type(oop field, oop value) {
3681 field->obj_field_put(_type_offset, value);
3682 }
3683
3684 int java_lang_reflect_Field::slot(oop reflect) {
3685 return reflect->int_field(_slot_offset);
3686 }
3687
3688 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3689 reflect->int_field_put(_slot_offset, value);
3690 }
3691
3692 int java_lang_reflect_Field::modifiers(oop field) {
3693 return field->int_field(_modifiers_offset);
3694 }
3695
3696 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3697 field->int_field_put(_modifiers_offset, value);
3698 }
3699
3700 void java_lang_reflect_Field::set_trusted_final(oop field) {
3701 field->bool_field_put(_trusted_final_offset, true);
3702 }
3703
3704 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3705 field->obj_field_put(_signature_offset, value);
3706 }
3707
3708 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3709 field->obj_field_put(_annotations_offset, value);
3710 }
3711
3712 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3713 // Allocate java.lang.reflect.RecordComponent instance
3714 HandleMark hm(THREAD);
3715 InstanceKlass* ik = vmClasses::RecordComponent_klass();
3716 assert(ik != nullptr, "must be loaded");
3717 ik->initialize(CHECK_NULL);
3718
3719 Handle element = ik->allocate_instance_handle(CHECK_NULL);
3720
3721 Handle decl_class(THREAD, holder->java_mirror());
3722 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3723
3724 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3725 oop component_name = StringTable::intern(name, CHECK_NULL);
3726 java_lang_reflect_RecordComponent::set_name(element(), component_name);
3727
3728 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3729 Handle component_type_h =
3730 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3731 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3732
3733 Method* accessor_method = nullptr;
3734 {
3735 // Prepend "()" to type to create the full method signature.
3736 ResourceMark rm(THREAD);
3737 int sig_len = type->utf8_length() + 3; // "()" and null char
3738 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3739 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3740 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3741 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3742 }
3743
3744 if (accessor_method != nullptr) {
3745 methodHandle method(THREAD, accessor_method);
3746 oop m = Reflection::new_method(method, false, CHECK_NULL);
3747 java_lang_reflect_RecordComponent::set_accessor(element(), m);
3748 } else {
3749 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3750 }
3751
3752 int sig_index = component->generic_signature_index();
3753 if (sig_index > 0) {
3754 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3755 oop component_sig = StringTable::intern(sig, CHECK_NULL);
3756 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3757 } else {
3758 java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3759 }
3760
3761 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3762 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3763
3764 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3765 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3766
3767 return element();
3768 }
3769
3770 int reflect_ConstantPool::_vmholder_offset;
3771
3772 void reflect_ConstantPool::compute_offsets() {
3773 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3774 // The field is injected and called Object vmholder in the jdk.internal.reflect.ConstantPool class.
3775 CONSTANTPOOL_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3776 }
3777
3778 #if INCLUDE_CDS
3779 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3780 CONSTANTPOOL_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3781 }
3782 #endif
3783
3784 int java_lang_reflect_Parameter::_name_offset;
3785 int java_lang_reflect_Parameter::_modifiers_offset;
3786 int java_lang_reflect_Parameter::_index_offset;
3787 int java_lang_reflect_Parameter::_executable_offset;
3788
3789 #define PARAMETER_FIELDS_DO(macro) \
3790 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3791 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3792 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \
3793 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3794
3795 void java_lang_reflect_Parameter::compute_offsets() {
3796 InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3797 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3798 }
3799
3800 #if INCLUDE_CDS
3801 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3802 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3803 }
3804 #endif
3805
3806 Handle java_lang_reflect_Parameter::create(TRAPS) {
3807 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3808 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3809 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3810 InstanceKlass* ik = InstanceKlass::cast(k);
3811 // Ensure it is initialized
3812 ik->initialize(CHECK_NH);
3813 return ik->allocate_instance_handle(THREAD);
3814 }
3815
3816 oop java_lang_reflect_Parameter::name(oop param) {
3817 return param->obj_field(_name_offset);
3818 }
3819
3820 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3821 param->obj_field_put(_name_offset, value);
3822 }
3823
3824 int java_lang_reflect_Parameter::modifiers(oop param) {
3825 return param->int_field(_modifiers_offset);
3826 }
3827
3828 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3829 param->int_field_put(_modifiers_offset, value);
3830 }
3831
3832 int java_lang_reflect_Parameter::index(oop param) {
3833 return param->int_field(_index_offset);
3834 }
3835
3836 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3837 param->int_field_put(_index_offset, value);
3838 }
3839
3840 oop java_lang_reflect_Parameter::executable(oop param) {
3841 return param->obj_field(_executable_offset);
3842 }
3843
3844 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3845 param->obj_field_put(_executable_offset, value);
3846 }
3847
3848 // java_lang_Module
3849
3850 int java_lang_Module::_loader_offset;
3851 int java_lang_Module::_name_offset;
3852 int java_lang_Module::_module_entry_offset;
3853
3854 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3855 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3856 return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3857 vmSymbols::java_lang_module_init_signature(),
3858 loader, module_name, CHECK_NH);
3859 }
3860
3861 #define MODULE_FIELDS_DO(macro) \
3862 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3863 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false)
3864
3865 void java_lang_Module::compute_offsets() {
3866 InstanceKlass* k = vmClasses::Module_klass();
3867 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3868 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3869 }
3870
3871 #if INCLUDE_CDS
3872 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3873 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3874 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3875 }
3876 #endif
3877
3878 oop java_lang_Module::loader(oop module) {
3879 return module->obj_field(_loader_offset);
3880 }
3881
3882 void java_lang_Module::set_loader(oop module, oop value) {
3883 module->obj_field_put(_loader_offset, value);
3884 }
3885
3886 oop java_lang_Module::name(oop module) {
3887 return module->obj_field(_name_offset);
3888 }
3889
3890 void java_lang_Module::set_name(oop module, oop value) {
3891 module->obj_field_put(_name_offset, value);
3892 }
3893
3894 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3895 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3896 assert(module != nullptr, "module can't be null");
3897 assert(oopDesc::is_oop(module), "module must be oop");
3898
3899 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3900 return module_entry;
3901 }
3902
3903 ModuleEntry* java_lang_Module::module_entry(oop module) {
3904 ModuleEntry* module_entry = module_entry_raw(module);
3905 if (module_entry == nullptr) {
3906 // If the inject field containing the ModuleEntry* is null then return the
3907 // class loader's unnamed module.
3908 oop loader = java_lang_Module::loader(module);
3909 Handle h_loader = Handle(Thread::current(), loader);
3910 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3911 return loader_cld->unnamed_module();
3912 }
3913 return module_entry;
3914 }
3915
3916 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3917 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3918 assert(module != nullptr, "module can't be null");
3919 assert(oopDesc::is_oop(module), "module must be oop");
3920 module->address_field_put(_module_entry_offset, (address)module_entry);
3921 }
3922
3923 Handle reflect_ConstantPool::create(TRAPS) {
3924 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3925 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3926 // Ensure it is initialized
3927 k->initialize(CHECK_NH);
3928 return k->allocate_instance_handle(THREAD);
3929 }
3930
3931
3932 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3933 assert(_vmholder_offset != 0, "Uninitialized vmholder");
3934 oop mirror = value->pool_holder()->java_mirror();
3935 // Save the mirror to get back the constant pool.
3936 reflect->obj_field_put(_vmholder_offset, mirror);
3937 }
3938
3939 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3940 assert(_vmholder_offset != 0, "Uninitialized vmholder");
3941 oop mirror = reflect->obj_field(_vmholder_offset);
3942 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(mirror);
3943
3944 // Get the constant pool back from the klass. Since class redefinition
3945 // merges the new constant pool into the old, this is essentially the
3946 // same constant pool as the original. If constant pool merging is
3947 // no longer done in the future, this will have to change to save
3948 // the original.
3949 return ik->constants();
3950 }
3951
3952
3953 // Support for java_lang_ref_Reference
3954
3955 bool java_lang_ref_Reference::_offsets_initialized;
3956
3957 int java_lang_ref_Reference::_referent_offset;
3958 int java_lang_ref_Reference::_queue_offset;
3959 int java_lang_ref_Reference::_next_offset;
3960 int java_lang_ref_Reference::_discovered_offset;
3961
3962 #define REFERENCE_FIELDS_DO(macro) \
3963 macro(_referent_offset, k, "referent", object_signature, false); \
3964 macro(_queue_offset, k, "queue", referencequeue_signature, false); \
3965 macro(_next_offset, k, "next", reference_signature, false); \
3966 macro(_discovered_offset, k, "discovered", reference_signature, false);
3967
3968 void java_lang_ref_Reference::compute_offsets() {
3969 if (_offsets_initialized) {
3970 return;
3971 }
3972 _offsets_initialized = true;
3973 InstanceKlass* k = vmClasses::Reference_klass();
3974 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3975 }
3976
3977 #if INCLUDE_CDS
3978 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3979 f->do_bool(&_offsets_initialized);
3980 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3981 }
3982 #endif
3983
3984 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3985 assert(obj != nullptr, "sanity");
3986 if (offset != _referent_offset) {
3987 return false;
3988 }
3989
3990 Klass* k = obj->klass();
3991 if (!k->is_instance_klass()) {
3992 return false;
3993 }
3994
3995 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3996 bool is_reference = ik->reference_type() != REF_NONE;
3997 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
3998 return is_reference;
3999 }
4000
4001 int java_lang_boxing_object::_value_offset;
4002 int java_lang_boxing_object::_long_value_offset;
4003
4004 #define BOXING_FIELDS_DO(macro) \
4005 macro(_value_offset, integerKlass, "value", int_signature, false); \
4006 macro(_long_value_offset, longKlass, "value", long_signature, false);
4007
4008 void java_lang_boxing_object::compute_offsets() {
4009 InstanceKlass* integerKlass = vmClasses::Integer_klass();
4010 InstanceKlass* longKlass = vmClasses::Long_klass();
4011 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4012 }
4013
4014 #if INCLUDE_CDS
4015 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
4016 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4017 }
4018 #endif
4019
4020 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
4021 Klass* k = vmClasses::box_klass(type);
4022 if (k == nullptr) return nullptr;
4023 InstanceKlass* ik = InstanceKlass::cast(k);
4024 if (!ik->is_initialized()) {
4025 ik->initialize(CHECK_NULL);
4026 }
4027 return ik->allocate_instance(THREAD);
4028 }
4029
4030
4031 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
4032 oop box = initialize_and_allocate(type, CHECK_NULL);
4033 if (box == nullptr) return nullptr;
4034 switch (type) {
4035 case T_BOOLEAN:
4036 box->bool_field_put(_value_offset, value->z);
4037 break;
4038 case T_CHAR:
4039 box->char_field_put(_value_offset, value->c);
4040 break;
4041 case T_FLOAT:
4042 box->float_field_put(_value_offset, value->f);
4043 break;
4044 case T_DOUBLE:
4045 box->double_field_put(_long_value_offset, value->d);
4046 break;
4047 case T_BYTE:
4048 box->byte_field_put(_value_offset, value->b);
4049 break;
4050 case T_SHORT:
4051 box->short_field_put(_value_offset, value->s);
4052 break;
4053 case T_INT:
4054 box->int_field_put(_value_offset, value->i);
4055 break;
4056 case T_LONG:
4057 box->long_field_put(_long_value_offset, value->j);
4058 break;
4059 default:
4060 return nullptr;
4061 }
4062 return box;
4063 }
4064
4065
4066 BasicType java_lang_boxing_object::basic_type(oop box) {
4067 if (box == nullptr) return T_ILLEGAL;
4068 BasicType type = vmClasses::box_klass_type(box->klass());
4069 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
4070 return T_ILLEGAL;
4071 return type;
4072 }
4073
4074
4075 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
4076 BasicType type = vmClasses::box_klass_type(box->klass());
4077 switch (type) {
4078 case T_BOOLEAN:
4079 value->z = box->bool_field(_value_offset);
4080 break;
4081 case T_CHAR:
4082 value->c = box->char_field(_value_offset);
4083 break;
4084 case T_FLOAT:
4085 value->f = box->float_field(_value_offset);
4086 break;
4087 case T_DOUBLE:
4088 value->d = box->double_field(_long_value_offset);
4089 break;
4090 case T_BYTE:
4091 value->b = box->byte_field(_value_offset);
4092 break;
4093 case T_SHORT:
4094 value->s = box->short_field(_value_offset);
4095 break;
4096 case T_INT:
4097 value->i = box->int_field(_value_offset);
4098 break;
4099 case T_LONG:
4100 value->j = box->long_field(_long_value_offset);
4101 break;
4102 default:
4103 return T_ILLEGAL;
4104 } // end switch
4105 return type;
4106 }
4107
4108
4109 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
4110 BasicType type = vmClasses::box_klass_type(box->klass());
4111 switch (type) {
4112 case T_BOOLEAN:
4113 box->bool_field_put(_value_offset, value->z);
4114 break;
4115 case T_CHAR:
4116 box->char_field_put(_value_offset, value->c);
4117 break;
4118 case T_FLOAT:
4119 box->float_field_put(_value_offset, value->f);
4120 break;
4121 case T_DOUBLE:
4122 box->double_field_put(_long_value_offset, value->d);
4123 break;
4124 case T_BYTE:
4125 box->byte_field_put(_value_offset, value->b);
4126 break;
4127 case T_SHORT:
4128 box->short_field_put(_value_offset, value->s);
4129 break;
4130 case T_INT:
4131 box->int_field_put(_value_offset, value->i);
4132 break;
4133 case T_LONG:
4134 box->long_field_put(_long_value_offset, value->j);
4135 break;
4136 default:
4137 return T_ILLEGAL;
4138 } // end switch
4139 return type;
4140 }
4141
4142
4143 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
4144 switch (type) {
4145 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
4146 case T_CHAR: st->print("%d", value->c); break;
4147 case T_BYTE: st->print("%d", value->b); break;
4148 case T_SHORT: st->print("%d", value->s); break;
4149 case T_INT: st->print("%d", value->i); break;
4150 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
4151 case T_FLOAT: st->print("%f", value->f); break;
4152 case T_DOUBLE: st->print("%lf", value->d); break;
4153 default: st->print("type %d?", type); break;
4154 }
4155 }
4156
4157
4158 // Support for java_lang_ref_SoftReference
4159 //
4160
4161 int java_lang_ref_SoftReference::_timestamp_offset;
4162 int java_lang_ref_SoftReference::_static_clock_offset;
4163
4164 #define SOFTREFERENCE_FIELDS_DO(macro) \
4165 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
4166 macro(_static_clock_offset, k, "clock", long_signature, true)
4167
4168 void java_lang_ref_SoftReference::compute_offsets() {
4169 InstanceKlass* k = vmClasses::SoftReference_klass();
4170 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4171 }
4172
4173 #if INCLUDE_CDS
4174 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
4175 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4176 }
4177 #endif
4178
4179 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
4180 return ref->long_field(_timestamp_offset);
4181 }
4182
4183 jlong java_lang_ref_SoftReference::clock() {
4184 InstanceKlass* ik = vmClasses::SoftReference_klass();
4185 oop base = ik->static_field_base_raw();
4186 return base->long_field(_static_clock_offset);
4187 }
4188
4189 void java_lang_ref_SoftReference::set_clock(jlong value) {
4190 InstanceKlass* ik = vmClasses::SoftReference_klass();
4191 oop base = ik->static_field_base_raw();
4192 base->long_field_put(_static_clock_offset, value);
4193 }
4194
4195 // Support for java_lang_invoke_DirectMethodHandle
4196
4197 int java_lang_invoke_DirectMethodHandle::_member_offset;
4198
4199 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
4200 oop member_name = nullptr;
4201 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
4202 "a DirectMethodHandle oop is expected");
4203 return dmh->obj_field(_member_offset);
4204 }
4205
4206 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
4207 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
4208
4209 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
4210 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
4211 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4212 }
4213
4214 #if INCLUDE_CDS
4215 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
4216 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4217 }
4218 #endif
4219
4220 // Support for java_lang_invoke_MethodHandle
4221
4222 int java_lang_invoke_MethodHandle::_type_offset;
4223 int java_lang_invoke_MethodHandle::_form_offset;
4224
4225 int java_lang_invoke_MemberName::_clazz_offset;
4226 int java_lang_invoke_MemberName::_name_offset;
4227 int java_lang_invoke_MemberName::_type_offset;
4228 int java_lang_invoke_MemberName::_flags_offset;
4229 int java_lang_invoke_MemberName::_method_offset;
4230 int java_lang_invoke_MemberName::_vmindex_offset;
4231
4232 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
4233 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
4234
4235 int java_lang_invoke_LambdaForm::_vmentry_offset;
4236
4237 #define METHODHANDLE_FIELDS_DO(macro) \
4238 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4239 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
4240
4241 void java_lang_invoke_MethodHandle::compute_offsets() {
4242 InstanceKlass* k = vmClasses::MethodHandle_klass();
4243 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4244 }
4245
4246 #if INCLUDE_CDS
4247 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4248 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4249 }
4250 #endif
4251
4252 #define MEMBERNAME_FIELDS_DO(macro) \
4253 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4254 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4255 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
4256 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
4257 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
4258
4259 void java_lang_invoke_MemberName::compute_offsets() {
4260 InstanceKlass* k = vmClasses::MemberName_klass();
4261 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4262 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4263 }
4264
4265 #if INCLUDE_CDS
4266 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4267 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4268 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4269 }
4270 #endif
4271
4272 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4273 macro(_vmholder_offset, k, "vmholder", class_signature, false)
4274
4275 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4276 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4277 assert(k != nullptr, "jdk mismatch");
4278 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4279 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4280 }
4281
4282 #if INCLUDE_CDS
4283 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4284 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4285 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4286 }
4287 #endif
4288
4289 #define LAMBDAFORM_FIELDS_DO(macro) \
4290 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4291
4292 void java_lang_invoke_LambdaForm::compute_offsets() {
4293 InstanceKlass* k = vmClasses::LambdaForm_klass();
4294 assert (k != nullptr, "jdk mismatch");
4295 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4296 }
4297
4298 #if INCLUDE_CDS
4299 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4300 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4301 }
4302 #endif
4303
4304 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4305 return obj != nullptr && is_subclass(obj->klass());
4306 }
4307
4308 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4309 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4310
4311 #define NEP_FIELDS_DO(macro) \
4312 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
4313 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4314
4315 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4316 return obj != nullptr && is_subclass(obj->klass());
4317 }
4318
4319 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4320 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4321 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4322 }
4323
4324 #if INCLUDE_CDS
4325 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4326 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4327 }
4328 #endif
4329
4330 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4331 return entry->obj_field(_method_type_offset);
4332 }
4333
4334 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4335 return entry->long_field(_downcall_stub_address_offset);
4336 }
4337
4338 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4339 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4340 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4341 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4342 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4343 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4344 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4345
4346 #define ABIDescriptor_FIELDS_DO(macro) \
4347 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4348 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4349 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4350 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4351 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4352 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4353 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4354
4355 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4356 return obj != nullptr && is_subclass(obj->klass());
4357 }
4358
4359 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4360 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4361 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4362 }
4363
4364 #if INCLUDE_CDS
4365 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4366 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4367 }
4368 #endif
4369
4370 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4371 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4372 }
4373
4374 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4375 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4376 }
4377
4378 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4379 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4380 }
4381
4382 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4383 return entry->int_field(_stackAlignment_offset);
4384 }
4385
4386 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4387 return entry->int_field(_shadowSpace_offset);
4388 }
4389
4390 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4391 return entry->obj_field(_scratch1_offset);
4392 }
4393
4394 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4395 return entry->obj_field(_scratch2_offset);
4396 }
4397
4398 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4399 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4400 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4401 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4402
4403 #define VMStorage_FIELDS_DO(macro) \
4404 macro(_type_offset, k, "type", byte_signature, false); \
4405 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4406 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4407 macro(_debugName_offset, k, "debugName", string_signature, false); \
4408
4409 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4410 return obj != nullptr && is_subclass(obj->klass());
4411 }
4412
4413 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4414 InstanceKlass* k = vmClasses::VMStorage_klass();
4415 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4416 }
4417
4418 #if INCLUDE_CDS
4419 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4420 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4421 }
4422 #endif
4423
4424 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4425 return entry->byte_field(_type_offset);
4426 }
4427
4428 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4429 return entry->int_field(_indexOrOffset_offset);
4430 }
4431
4432 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4433 return entry->short_field(_segmentMaskOrSize_offset);
4434 }
4435
4436 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4437 return entry->obj_field(_debugName_offset);
4438 }
4439
4440 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4441 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4442
4443 #define CallConv_FIELDS_DO(macro) \
4444 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4445 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4446
4447 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4448 return obj != nullptr && is_subclass(obj->klass());
4449 }
4450
4451 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4452 InstanceKlass* k = vmClasses::CallConv_klass();
4453 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4454 }
4455
4456 #if INCLUDE_CDS
4457 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4458 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4459 }
4460 #endif
4461
4462 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4463 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4464 }
4465
4466 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4467 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4468 }
4469
4470 oop java_lang_invoke_MethodHandle::type(oop mh) {
4471 return mh->obj_field(_type_offset);
4472 }
4473
4474 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4475 mh->obj_field_put(_type_offset, mtype);
4476 }
4477
4478 oop java_lang_invoke_MethodHandle::form(oop mh) {
4479 assert(_form_offset != 0, "");
4480 return mh->obj_field(_form_offset);
4481 }
4482
4483 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4484 assert(_form_offset != 0, "");
4485 mh->obj_field_put(_form_offset, lform);
4486 }
4487
4488 /// MemberName accessors
4489
4490 oop java_lang_invoke_MemberName::clazz(oop mname) {
4491 assert(is_instance(mname), "wrong type");
4492 return mname->obj_field(_clazz_offset);
4493 }
4494
4495 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4496 assert(is_instance(mname), "wrong type");
4497 mname->obj_field_put(_clazz_offset, clazz);
4498 }
4499
4500 oop java_lang_invoke_MemberName::name(oop mname) {
4501 assert(is_instance(mname), "wrong type");
4502 return mname->obj_field(_name_offset);
4503 }
4504
4505 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4506 assert(is_instance(mname), "wrong type");
4507 mname->obj_field_put(_name_offset, name);
4508 }
4509
4510 oop java_lang_invoke_MemberName::type(oop mname) {
4511 assert(is_instance(mname), "wrong type");
4512 return mname->obj_field(_type_offset);
4513 }
4514
4515 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4516 assert(is_instance(mname), "wrong type");
4517 mname->obj_field_put(_type_offset, type);
4518 }
4519
4520 int java_lang_invoke_MemberName::flags(oop mname) {
4521 assert(is_instance(mname), "wrong type");
4522 return mname->int_field(_flags_offset);
4523 }
4524
4525 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4526 assert(is_instance(mname), "wrong type");
4527 mname->int_field_put(_flags_offset, flags);
4528 }
4529
4530
4531 // Return vmtarget from ResolvedMethodName method field through indirection
4532 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4533 assert(is_instance(mname), "wrong type");
4534 oop method = mname->obj_field(_method_offset);
4535 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4536 }
4537
4538 bool java_lang_invoke_MemberName::is_method(oop mname) {
4539 assert(is_instance(mname), "must be MemberName");
4540 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
4541 }
4542
4543 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4544 assert(is_instance(mname), "wrong type");
4545 mname->obj_field_put(_method_offset, resolved_method);
4546 }
4547
4548 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4549 assert(is_instance(mname), "wrong type");
4550 return (intptr_t) mname->address_field(_vmindex_offset);
4551 }
4552
4553 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4554 assert(is_instance(mname), "wrong type");
4555 mname->address_field_put(_vmindex_offset, (address) index);
4556 }
4557
4558
4559 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4560 assert(is_instance(resolved_method), "wrong type");
4561 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4562 assert(m->is_method(), "must be");
4563 return m;
4564 }
4565
4566 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4567 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4568 assert(is_instance(resolved_method), "wrong type");
4569 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4570 }
4571
4572 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4573 assert(is_instance(resolved_method), "wrong type");
4574 resolved_method->obj_field_put(_vmholder_offset, holder);
4575 }
4576
4577 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4578 const Method* method = m();
4579
4580 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4581 oop resolved_method = ResolvedMethodTable::find_method(method);
4582 if (resolved_method != nullptr) {
4583 return resolved_method;
4584 }
4585
4586 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4587 if (!k->is_initialized()) {
4588 k->initialize(CHECK_NULL);
4589 }
4590
4591 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4592
4593 NoSafepointVerifier nsv;
4594
4595 if (method->is_old()) {
4596 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4597 method->get_new_method();
4598 }
4599
4600 InstanceKlass* holder = method->method_holder();
4601
4602 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4603 // Add a reference to the loader (actually mirror because hidden classes may not have
4604 // distinct loaders) to ensure the metadata is kept alive.
4605 // This mirror may be different than the one in clazz field.
4606 set_vmholder(new_resolved_method, holder->java_mirror());
4607
4608 // Set flag in class to indicate this InstanceKlass has entries in the table
4609 // to avoid walking table during redefinition if none of the redefined classes
4610 // have any membernames in the table.
4611 holder->set_has_resolved_methods();
4612
4613 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4614 }
4615
4616 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4617 assert(is_instance(lform), "wrong type");
4618 return lform->obj_field(_vmentry_offset);
4619 }
4620
4621
4622 // Support for java_lang_invoke_MethodType
4623
4624 int java_lang_invoke_MethodType::_rtype_offset;
4625 int java_lang_invoke_MethodType::_ptypes_offset;
4626
4627 #define METHODTYPE_FIELDS_DO(macro) \
4628 macro(_rtype_offset, k, "rtype", class_signature, false); \
4629 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4630
4631 void java_lang_invoke_MethodType::compute_offsets() {
4632 InstanceKlass* k = vmClasses::MethodType_klass();
4633 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4634 }
4635
4636 #if INCLUDE_CDS
4637 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4638 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4639 }
4640 #endif
4641
4642 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4643 st->print("(");
4644 objArrayOop pts = ptypes(mt);
4645 if (pts != nullptr) {
4646 for (int i = 0, limit = pts->length(); i < limit; i++) {
4647 java_lang_Class::print_signature(pts->obj_at(i), st);
4648 }
4649 } else {
4650 st->print("null");
4651 }
4652 st->print(")");
4653 oop rt = rtype(mt);
4654 if (rt != nullptr) {
4655 java_lang_Class::print_signature(rt, st);
4656 } else {
4657 st->print("null");
4658 }
4659 }
4660
4661 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4662 ResourceMark rm;
4663 stringStream buffer(128);
4664 print_signature(mt, &buffer);
4665 const char* sigstr = buffer.base();
4666 int siglen = (int) buffer.size();
4667 Symbol *name;
4668 if (!intern_if_not_found) {
4669 name = SymbolTable::probe(sigstr, siglen);
4670 } else {
4671 name = SymbolTable::new_symbol(sigstr, siglen);
4672 }
4673 return name;
4674 }
4675
4676 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4677 if (mt1 == mt2)
4678 return true;
4679 if (rtype(mt1) != rtype(mt2))
4680 return false;
4681 if (ptype_count(mt1) != ptype_count(mt2))
4682 return false;
4683 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4684 if (ptype(mt1, i) != ptype(mt2, i))
4685 return false;
4686 }
4687 return true;
4688 }
4689
4690 oop java_lang_invoke_MethodType::rtype(oop mt) {
4691 assert(is_instance(mt), "must be a MethodType");
4692 return mt->obj_field(_rtype_offset);
4693 }
4694
4695 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4696 assert(is_instance(mt), "must be a MethodType");
4697 return (objArrayOop) mt->obj_field(_ptypes_offset);
4698 }
4699
4700 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4701 return ptypes(mt)->obj_at(idx);
4702 }
4703
4704 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4705 return ptypes(mt)->length();
4706 }
4707
4708 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4709 objArrayOop pts = ptypes(mt);
4710 int count = pts->length();
4711 int slots = 0;
4712 for (int i = 0; i < count; i++) {
4713 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4714 slots += type2size[bt];
4715 }
4716 return slots;
4717 }
4718
4719 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4720 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4721 return type2size[bt];
4722 }
4723
4724
4725 // Support for java_lang_invoke_CallSite
4726
4727 int java_lang_invoke_CallSite::_target_offset;
4728 int java_lang_invoke_CallSite::_vmdependencies_offset;
4729 int java_lang_invoke_CallSite::_last_cleanup_offset;
4730
4731 #define CALLSITE_FIELDS_DO(macro) \
4732 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
4733
4734 void java_lang_invoke_CallSite::compute_offsets() {
4735 InstanceKlass* k = vmClasses::CallSite_klass();
4736 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4737 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4738 }
4739
4740 #if INCLUDE_CDS
4741 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4742 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4743 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4744 }
4745 #endif
4746
4747 DependencyContext java_lang_invoke_CallSite::vmdependencies(oop call_site) {
4748 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4749 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4750 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4751 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4752 return dep_ctx;
4753 }
4754
4755 // Support for java_lang_invoke_ConstantCallSite
4756
4757 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4758
4759 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4760 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4761
4762 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4763 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4764 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4765 }
4766
4767 #if INCLUDE_CDS
4768 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4769 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4770 }
4771 #endif
4772
4773 // Support for java_lang_ClassLoader
4774
4775 int java_lang_ClassLoader::_loader_data_offset;
4776 int java_lang_ClassLoader::_parallelCapable_offset;
4777 int java_lang_ClassLoader::_name_offset;
4778 int java_lang_ClassLoader::_nameAndId_offset;
4779 int java_lang_ClassLoader::_unnamedModule_offset;
4780 int java_lang_ClassLoader::_parent_offset;
4781
4782 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4783 assert(loader != nullptr, "loader must not be null");
4784 assert(oopDesc::is_oop(loader), "loader must be oop");
4785 return AtomicAccess::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4786 }
4787
4788 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4789 assert(loader != nullptr, "loader must not be null");
4790 assert(oopDesc::is_oop(loader), "loader must be oop");
4791 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4792 }
4793
4794 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4795 assert(loader != nullptr, "loader must not be null");
4796 assert(oopDesc::is_oop(loader), "loader must be oop");
4797 AtomicAccess::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4798 }
4799
4800 #define CLASSLOADER_FIELDS_DO(macro) \
4801 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4802 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4803 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
4804 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4805 macro(_parent_offset, k1, "parent", classloader_signature, false)
4806
4807 void java_lang_ClassLoader::compute_offsets() {
4808 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4809 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4810
4811 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4812 }
4813
4814 #if INCLUDE_CDS
4815 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4816 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4817 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4818 }
4819 #endif
4820
4821 oop java_lang_ClassLoader::parent(oop loader) {
4822 assert(is_instance(loader), "loader must be oop");
4823 return loader->obj_field(_parent_offset);
4824 }
4825
4826 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4827 assert(is_instance(loader), "loader must be oop");
4828 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4829 }
4830
4831 // Returns the name field of this class loader. If the name field has not
4832 // been set, null will be returned.
4833 oop java_lang_ClassLoader::name(oop loader) {
4834 assert(is_instance(loader), "loader must be oop");
4835 return loader->obj_field(_name_offset);
4836 }
4837
4838 // Returns the nameAndId field of this class loader. The format is
4839 // as follows:
4840 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4841 // If the defining loader has no name then <qualified-class-name> @<id>
4842 // If built-in loader, then omit '@<id>' as there is only one instance.
4843 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4844 oop java_lang_ClassLoader::nameAndId(oop loader) {
4845 assert(is_instance(loader), "loader must be oop");
4846 return loader->obj_field(_nameAndId_offset);
4847 }
4848
4849 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4850 assert(is_instance(loader), "loader must be oop");
4851 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4852 oop acl = loader;
4853 DEBUG_ONLY(jint loop_count = 0);
4854 // This loop taken verbatim from ClassLoader.java:
4855 do {
4856 acl = parent(acl);
4857 if (cl == acl) {
4858 return true;
4859 }
4860 assert(++loop_count > 0, "loop_count overflow");
4861 } while (acl != nullptr);
4862 return false;
4863 }
4864
4865 bool java_lang_ClassLoader::is_instance(oop obj) {
4866 return obj != nullptr && is_subclass(obj->klass());
4867 }
4868
4869
4870 // For class loader classes, parallelCapable defined
4871 // based on non-null field
4872 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4873 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4874 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4875 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4876 }
4877
4878 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4879 oop cl = SystemDictionary::java_system_loader();
4880 while(cl != nullptr) {
4881 if (cl == loader) return true;
4882 cl = parent(cl);
4883 }
4884 return false;
4885 }
4886
4887 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4888 assert(is_instance(loader), "loader must be oop");
4889 return loader->obj_field(_unnamedModule_offset);
4890 }
4891
4892 // Support for java_lang_System
4893 //
4894
4895 int java_lang_System::_static_in_offset;
4896 int java_lang_System::_static_out_offset;
4897 int java_lang_System::_static_err_offset;
4898
4899 #define SYSTEM_FIELDS_DO(macro) \
4900 macro(_static_in_offset, k, "in", input_stream_signature, true); \
4901 macro(_static_out_offset, k, "out", print_stream_signature, true); \
4902 macro(_static_err_offset, k, "err", print_stream_signature, true);
4903
4904 void java_lang_System::compute_offsets() {
4905 InstanceKlass* k = vmClasses::System_klass();
4906 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4907 }
4908
4909 #if INCLUDE_CDS
4910 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4911 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4912 }
4913 #endif
4914
4915 // Support for jdk_internal_misc_UnsafeConstants
4916 //
4917 class UnsafeConstantsFixup : public FieldClosure {
4918 private:
4919 int _address_size;
4920 int _page_size;
4921 bool _big_endian;
4922 bool _use_unaligned_access;
4923 int _data_cache_line_flush_size;
4924 public:
4925 UnsafeConstantsFixup() {
4926 // round up values for all static final fields
4927 _address_size = sizeof(void*);
4928 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4929 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4930 _use_unaligned_access = UseUnalignedAccesses;
4931 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4932 }
4933
4934 void do_field(fieldDescriptor* fd) {
4935 oop mirror = fd->field_holder()->java_mirror();
4936 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4937 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4938 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4939 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4940 if (fd->name() == vmSymbols::address_size_name()) {
4941 mirror->int_field_put(fd->offset(), _address_size);
4942 } else if (fd->name() == vmSymbols::page_size_name()) {
4943 mirror->int_field_put(fd->offset(), _page_size);
4944 } else if (fd->name() == vmSymbols::big_endian_name()) {
4945 mirror->bool_field_put(fd->offset(), _big_endian);
4946 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4947 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4948 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4949 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4950 } else {
4951 assert(false, "unexpected UnsafeConstants field");
4952 }
4953 }
4954 };
4955
4956 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4957 UnsafeConstantsFixup fixup;
4958 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4959 }
4960
4961
4962 // java_lang_StackTraceElement
4963
4964 int java_lang_StackTraceElement::_methodName_offset;
4965 int java_lang_StackTraceElement::_fileName_offset;
4966 int java_lang_StackTraceElement::_lineNumber_offset;
4967 int java_lang_StackTraceElement::_moduleName_offset;
4968 int java_lang_StackTraceElement::_moduleVersion_offset;
4969 int java_lang_StackTraceElement::_classLoaderName_offset;
4970 int java_lang_StackTraceElement::_declaringClass_offset;
4971 int java_lang_StackTraceElement::_declaringClassObject_offset;
4972
4973 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4974 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4975 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4976 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
4977 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4978 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
4979 macro(_methodName_offset, k, "methodName", string_signature, false); \
4980 macro(_fileName_offset, k, "fileName", string_signature, false); \
4981 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
4982
4983 // Support for java_lang_StackTraceElement
4984 void java_lang_StackTraceElement::compute_offsets() {
4985 InstanceKlass* k = vmClasses::StackTraceElement_klass();
4986 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4987 }
4988
4989 #if INCLUDE_CDS
4990 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4991 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4992 }
4993 #endif
4994
4995 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4996 element->obj_field_put(_fileName_offset, value);
4997 }
4998
4999 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
5000 element->obj_field_put(_declaringClass_offset, value);
5001 }
5002
5003 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
5004 element->obj_field_put(_methodName_offset, value);
5005 }
5006
5007 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
5008 element->int_field_put(_lineNumber_offset, value);
5009 }
5010
5011 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
5012 element->obj_field_put(_moduleName_offset, value);
5013 }
5014
5015 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
5016 element->obj_field_put(_moduleVersion_offset, value);
5017 }
5018
5019 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
5020 element->obj_field_put(_classLoaderName_offset, value);
5021 }
5022
5023 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
5024 element->obj_field_put(_declaringClassObject_offset, value);
5025 }
5026
5027
5028 // java_lang_AssertionStatusDirectives
5029
5030 int java_lang_AssertionStatusDirectives::_classes_offset;
5031 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
5032 int java_lang_AssertionStatusDirectives::_packages_offset;
5033 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
5034 int java_lang_AssertionStatusDirectives::_deflt_offset;
5035
5036 // Support for java Assertions - java_lang_AssertionStatusDirectives.
5037 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
5038 macro(_classes_offset, k, "classes", string_array_signature, false); \
5039 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
5040 macro(_packages_offset, k, "packages", string_array_signature, false); \
5041 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
5042 macro(_deflt_offset, k, "deflt", bool_signature, false)
5043
5044 void java_lang_AssertionStatusDirectives::compute_offsets() {
5045 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
5046 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5047 }
5048
5049 #if INCLUDE_CDS
5050 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
5051 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5052 }
5053 #endif
5054
5055 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
5056 o->obj_field_put(_classes_offset, val);
5057 }
5058
5059 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
5060 o->obj_field_put(_classEnabled_offset, val);
5061 }
5062
5063 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
5064 o->obj_field_put(_packages_offset, val);
5065 }
5066
5067 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
5068 o->obj_field_put(_packageEnabled_offset, val);
5069 }
5070
5071 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
5072 o->bool_field_put(_deflt_offset, val);
5073 }
5074
5075 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
5076
5077 #define AOS_FIELDS_DO(macro) \
5078 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
5079
5080 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
5081 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
5082 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5083 }
5084
5085 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
5086 assert(_owner_offset != 0, "Must be initialized");
5087 return obj->obj_field(_owner_offset);
5088 }
5089
5090 #if INCLUDE_CDS
5091 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
5092 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5093 }
5094 #endif
5095
5096 int vector_VectorPayload::_payload_offset;
5097
5098 #define VECTORPAYLOAD_FIELDS_DO(macro) \
5099 macro(_payload_offset, k, "payload", object_signature, false)
5100
5101 void vector_VectorPayload::compute_offsets() {
5102 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
5103 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5104 }
5105
5106 #if INCLUDE_CDS
5107 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
5108 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5109 }
5110 #endif
5111
5112 void vector_VectorPayload::set_payload(oop o, oop val) {
5113 o->obj_field_put(_payload_offset, val);
5114 }
5115
5116 bool vector_VectorPayload::is_instance(oop obj) {
5117 return obj != nullptr && is_subclass(obj->klass());
5118 }
5119
5120 int java_lang_Integer_IntegerCache::_static_cache_offset;
5121 int java_lang_Long_LongCache::_static_cache_offset;
5122 int java_lang_Character_CharacterCache::_static_cache_offset;
5123 int java_lang_Short_ShortCache::_static_cache_offset;
5124 int java_lang_Byte_ByteCache::_static_cache_offset;
5125
5126 #define INTEGER_CACHE_FIELDS_DO(macro) \
5127 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5128
5129 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5130 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5131 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5132 }
5133
5134 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5135 oop base = ik->static_field_base_raw();
5136 return objArrayOop(base->obj_field(_static_cache_offset));
5137 }
5138
5139 Symbol* java_lang_Integer_IntegerCache::symbol() {
5140 return vmSymbols::java_lang_Integer_IntegerCache();
5141 }
5142
5143 #if INCLUDE_CDS
5144 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5145 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5146 }
5147 #endif
5148 #undef INTEGER_CACHE_FIELDS_DO
5149
5150 jint java_lang_Integer::value(oop obj) {
5151 jvalue v;
5152 java_lang_boxing_object::get_value(obj, &v);
5153 return v.i;
5154 }
5155
5156 #define LONG_CACHE_FIELDS_DO(macro) \
5157 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5158
5159 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5160 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5161 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5162 }
5163
5164 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5165 oop base = ik->static_field_base_raw();
5166 return objArrayOop(base->obj_field(_static_cache_offset));
5167 }
5168
5169 Symbol* java_lang_Long_LongCache::symbol() {
5170 return vmSymbols::java_lang_Long_LongCache();
5171 }
5172
5173 #if INCLUDE_CDS
5174 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5175 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5176 }
5177 #endif
5178 #undef LONG_CACHE_FIELDS_DO
5179
5180 jlong java_lang_Long::value(oop obj) {
5181 jvalue v;
5182 java_lang_boxing_object::get_value(obj, &v);
5183 return v.j;
5184 }
5185
5186 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5187 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5188
5189 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5190 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5191 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5192 }
5193
5194 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5195 oop base = ik->static_field_base_raw();
5196 return objArrayOop(base->obj_field(_static_cache_offset));
5197 }
5198
5199 Symbol* java_lang_Character_CharacterCache::symbol() {
5200 return vmSymbols::java_lang_Character_CharacterCache();
5201 }
5202
5203 #if INCLUDE_CDS
5204 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5205 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5206 }
5207 #endif
5208 #undef CHARACTER_CACHE_FIELDS_DO
5209
5210 jchar java_lang_Character::value(oop obj) {
5211 jvalue v;
5212 java_lang_boxing_object::get_value(obj, &v);
5213 return v.c;
5214 }
5215
5216 #define SHORT_CACHE_FIELDS_DO(macro) \
5217 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5218
5219 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5220 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5221 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5222 }
5223
5224 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5225 oop base = ik->static_field_base_raw();
5226 return objArrayOop(base->obj_field(_static_cache_offset));
5227 }
5228
5229 Symbol* java_lang_Short_ShortCache::symbol() {
5230 return vmSymbols::java_lang_Short_ShortCache();
5231 }
5232
5233 #if INCLUDE_CDS
5234 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5235 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5236 }
5237 #endif
5238 #undef SHORT_CACHE_FIELDS_DO
5239
5240 jshort java_lang_Short::value(oop obj) {
5241 jvalue v;
5242 java_lang_boxing_object::get_value(obj, &v);
5243 return v.s;
5244 }
5245
5246 #define BYTE_CACHE_FIELDS_DO(macro) \
5247 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5248
5249 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5250 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5251 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5252 }
5253
5254 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5255 oop base = ik->static_field_base_raw();
5256 return objArrayOop(base->obj_field(_static_cache_offset));
5257 }
5258
5259 Symbol* java_lang_Byte_ByteCache::symbol() {
5260 return vmSymbols::java_lang_Byte_ByteCache();
5261 }
5262
5263 #if INCLUDE_CDS
5264 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5265 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5266 }
5267 #endif
5268 #undef BYTE_CACHE_FIELDS_DO
5269
5270 jbyte java_lang_Byte::value(oop obj) {
5271 jvalue v;
5272 java_lang_boxing_object::get_value(obj, &v);
5273 return v.b;
5274 }
5275
5276 int java_lang_Boolean::_static_TRUE_offset;
5277 int java_lang_Boolean::_static_FALSE_offset;
5278
5279 #define BOOLEAN_FIELDS_DO(macro) \
5280 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5281 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5282
5283
5284 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5285 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5286 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5287 }
5288
5289 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5290 oop base = ik->static_field_base_raw();
5291 return base->obj_field(_static_TRUE_offset);
5292 }
5293
5294 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5295 oop base = ik->static_field_base_raw();
5296 return base->obj_field(_static_FALSE_offset);
5297 }
5298
5299 Symbol* java_lang_Boolean::symbol() {
5300 return vmSymbols::java_lang_Boolean();
5301 }
5302
5303 #if INCLUDE_CDS
5304 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5305 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5306 }
5307 #endif
5308 #undef BOOLEAN_CACHE_FIELDS_DO
5309
5310 jboolean java_lang_Boolean::value(oop obj) {
5311 jvalue v;
5312 java_lang_boxing_object::get_value(obj, &v);
5313 return v.z;
5314 }
5315
5316 // java_lang_reflect_RecordComponent
5317
5318 int java_lang_reflect_RecordComponent::_clazz_offset;
5319 int java_lang_reflect_RecordComponent::_name_offset;
5320 int java_lang_reflect_RecordComponent::_type_offset;
5321 int java_lang_reflect_RecordComponent::_accessor_offset;
5322 int java_lang_reflect_RecordComponent::_signature_offset;
5323 int java_lang_reflect_RecordComponent::_annotations_offset;
5324 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5325
5326 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5327 macro(_clazz_offset, k, "clazz", class_signature, false); \
5328 macro(_name_offset, k, "name", string_signature, false); \
5329 macro(_type_offset, k, "type", class_signature, false); \
5330 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5331 macro(_signature_offset, k, "signature", string_signature, false); \
5332 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5333 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5334
5335 // Support for java_lang_reflect_RecordComponent
5336 void java_lang_reflect_RecordComponent::compute_offsets() {
5337 InstanceKlass* k = vmClasses::RecordComponent_klass();
5338 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5339 }
5340
5341 #if INCLUDE_CDS
5342 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5343 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5344 }
5345 #endif
5346
5347 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5348 element->obj_field_put(_clazz_offset, value);
5349 }
5350
5351 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5352 element->obj_field_put(_name_offset, value);
5353 }
5354
5355 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5356 element->obj_field_put(_type_offset, value);
5357 }
5358
5359 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5360 element->obj_field_put(_accessor_offset, value);
5361 }
5362
5363 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5364 element->obj_field_put(_signature_offset, value);
5365 }
5366
5367 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5368 element->obj_field_put(_annotations_offset, value);
5369 }
5370
5371 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5372 element->obj_field_put(_typeAnnotations_offset, value);
5373 }
5374
5375 // java_lang_InternalError
5376 int java_lang_InternalError::_during_unsafe_access_offset;
5377
5378 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5379 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5380 }
5381
5382 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5383 return internal_error->bool_field(_during_unsafe_access_offset);
5384 }
5385
5386 void java_lang_InternalError::compute_offsets() {
5387 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5388 }
5389
5390 #if INCLUDE_CDS
5391 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5392 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5393 }
5394 #endif
5395
5396 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5397 f(java_lang_Class) \
5398 f(java_lang_String) \
5399 f(java_lang_ref_Reference) \
5400 //end
5401
5402 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5403 f(java_lang_System) \
5404 f(java_lang_ClassLoader) \
5405 f(java_lang_Throwable) \
5406 f(java_lang_Thread) \
5407 f(java_lang_Thread_FieldHolder) \
5408 f(java_lang_Thread_Constants) \
5409 f(java_lang_ThreadGroup) \
5410 f(java_lang_VirtualThread) \
5411 f(java_lang_InternalError) \
5412 f(java_lang_AssertionStatusDirectives) \
5413 f(java_lang_ref_SoftReference) \
5414 f(java_lang_invoke_MethodHandle) \
5415 f(java_lang_invoke_DirectMethodHandle) \
5416 f(java_lang_invoke_MemberName) \
5417 f(java_lang_invoke_ResolvedMethodName) \
5418 f(java_lang_invoke_LambdaForm) \
5419 f(java_lang_invoke_MethodType) \
5420 f(java_lang_invoke_CallSite) \
5421 f(java_lang_invoke_ConstantCallSite) \
5422 f(java_lang_reflect_AccessibleObject) \
5423 f(java_lang_reflect_Method) \
5424 f(java_lang_reflect_Constructor) \
5425 f(java_lang_reflect_Field) \
5426 f(java_lang_reflect_RecordComponent) \
5427 f(reflect_ConstantPool) \
5428 f(java_lang_reflect_Parameter) \
5429 f(java_lang_Module) \
5430 f(java_lang_StackTraceElement) \
5431 f(java_lang_ClassFrameInfo) \
5432 f(java_lang_StackFrameInfo) \
5433 f(java_lang_LiveStackFrameInfo) \
5434 f(jdk_internal_vm_ContinuationScope) \
5435 f(jdk_internal_vm_Continuation) \
5436 f(jdk_internal_vm_StackChunk) \
5437 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5438 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5439 f(jdk_internal_foreign_abi_ABIDescriptor) \
5440 f(jdk_internal_foreign_abi_VMStorage) \
5441 f(jdk_internal_foreign_abi_CallConv) \
5442 f(jdk_internal_misc_UnsafeConstants) \
5443 f(java_lang_boxing_object) \
5444 f(vector_VectorPayload) \
5445 //end
5446
5447 #define BASIC_JAVA_CLASSES_DO(f) \
5448 BASIC_JAVA_CLASSES_DO_PART1(f) \
5449 BASIC_JAVA_CLASSES_DO_PART2(f)
5450
5451 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5452
5453 // Compute field offsets of all the classes in this file
5454 void JavaClasses::compute_offsets() {
5455 if (CDSConfig::is_using_archive()) {
5456 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5457 JvmtiExport::has_early_class_hook_env()),
5458 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5459 // None of the classes used by the rest of this function can be replaced by
5460 // JVMTI ClassFileLoadHook.
5461 // We are safe to use the archived offsets, which have already been restored
5462 // by JavaClasses::serialize_offsets, without computing the offsets again.
5463 return;
5464 }
5465
5466 // We have already called the compute_offsets() of the
5467 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5468 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5469 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5470 }
5471
5472 #if INCLUDE_CDS
5473 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5474
5475 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5476 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5477 }
5478 #endif
5479
5480 #if INCLUDE_CDS_JAVA_HEAP
5481 bool JavaClasses::is_supported_for_archiving(oop obj) {
5482 Klass* klass = obj->klass();
5483
5484 if (!CDSConfig::is_dumping_method_handles()) {
5485 // These are supported by CDS only when CDSConfig::is_dumping_method_handles() is enabled.
5486 if (klass == vmClasses::ResolvedMethodName_klass() ||
5487 klass == vmClasses::MemberName_klass()) {
5488 return false;
5489 }
5490 }
5491
5492 if (!AOTReferenceObjSupport::is_enabled() && klass->is_subclass_of(vmClasses::Reference_klass())) {
5493 return false;
5494 }
5495
5496 return true;
5497 }
5498 #endif
5499
5500 #ifndef PRODUCT
5501
5502 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5503
5504 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5505 const char* field_sig) {
5506 EXCEPTION_MARK;
5507 fieldDescriptor fd;
5508 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5509 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5510 InstanceKlass* ik = InstanceKlass::cast(k);
5511 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5512 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5513 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5514 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5515 return false;
5516 }
5517 if (fd.is_static()) {
5518 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5519 return false;
5520 }
5521 if (fd.offset() == deserialized_offset ) {
5522 return true;
5523 } else {
5524 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5525 klass_name, field_name, deserialized_offset, fd.offset());
5526 return false;
5527 }
5528 }
5529
5530 void JavaClasses::check_offsets() {
5531 bool valid = true;
5532
5533 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5534 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5535
5536 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5537 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5538
5539 // Boxed primitive objects (java_lang_boxing_object)
5540
5541 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
5542 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5543 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
5544 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5545 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
5546 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
5547 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
5548 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5549
5550 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5551 }
5552
5553 #endif // PRODUCT
5554
5555 int InjectedField::compute_offset() {
5556 InstanceKlass* ik = klass();
5557 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5558 if (!may_be_java && !fs.field_flags().is_injected()) {
5559 // Only look at injected fields
5560 continue;
5561 }
5562 if (fs.name() == name() && fs.signature() == signature()) {
5563 return fs.offset();
5564 }
5565 }
5566 ResourceMark rm;
5567 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)" : "");
5568 #ifndef PRODUCT
5569 ik->print();
5570 tty->print_cr("all fields:");
5571 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5572 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());
5573 }
5574 #endif //PRODUCT
5575 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5576 return -1;
5577 }
5578
5579 void javaClasses_init() {
5580 JavaClasses::compute_offsets();
5581 JavaClasses::check_offsets();
5582 }