1 /*
2 * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "cds/aotMetaspace.hpp"
26 #include "cds/aotReferenceObjSupport.hpp"
27 #include "cds/archiveBuilder.hpp"
28 #include "cds/archiveHeapLoader.hpp"
29 #include "cds/cdsConfig.hpp"
30 #include "cds/heapShared.hpp"
31 #include "classfile/altHashing.hpp"
32 #include "classfile/classLoaderData.inline.hpp"
33 #include "classfile/javaClasses.inline.hpp"
34 #include "classfile/javaClassesImpl.hpp"
35 #include "classfile/javaThreadStatus.hpp"
36 #include "classfile/moduleEntry.hpp"
37 #include "classfile/stringTable.hpp"
38 #include "classfile/symbolTable.hpp"
39 #include "classfile/systemDictionary.hpp"
40 #include "classfile/vmClasses.hpp"
41 #include "classfile/vmSymbols.hpp"
42 #include "code/debugInfo.hpp"
43 #include "code/dependencyContext.hpp"
44 #include "code/pcDesc.hpp"
45 #include "gc/shared/collectedHeap.inline.hpp"
46 #include "interpreter/interpreter.hpp"
47 #include "interpreter/linkResolver.hpp"
48 #include "jvm.h"
49 #include "logging/log.hpp"
50 #include "logging/logStream.hpp"
51 #include "memory/oopFactory.hpp"
52 #include "memory/resourceArea.hpp"
53 #include "memory/universe.hpp"
54 #include "oops/fieldInfo.hpp"
55 #include "oops/fieldStreams.inline.hpp"
56 #include "oops/instanceKlass.inline.hpp"
57 #include "oops/instanceMirrorKlass.hpp"
58 #include "oops/klass.inline.hpp"
59 #include "oops/method.inline.hpp"
60 #include "oops/objArrayKlass.hpp"
61 #include "oops/objArrayOop.inline.hpp"
62 #include "oops/oop.inline.hpp"
63 #include "oops/oopCast.inline.hpp"
64 #include "oops/recordComponent.hpp"
65 #include "oops/symbol.hpp"
66 #include "oops/typeArrayOop.inline.hpp"
67 #include "prims/jvmtiExport.hpp"
68 #include "prims/methodHandles.hpp"
69 #include "prims/resolvedMethodTable.hpp"
70 #include "runtime/continuationEntry.inline.hpp"
71 #include "runtime/continuationJavaClasses.inline.hpp"
72 #include "runtime/fieldDescriptor.inline.hpp"
73 #include "runtime/frame.inline.hpp"
74 #include "runtime/handles.inline.hpp"
75 #include "runtime/handshake.hpp"
76 #include "runtime/init.hpp"
77 #include "runtime/interfaceSupport.inline.hpp"
78 #include "runtime/java.hpp"
79 #include "runtime/javaCalls.hpp"
80 #include "runtime/javaThread.hpp"
81 #include "runtime/jniHandles.inline.hpp"
82 #include "runtime/reflection.hpp"
83 #include "runtime/safepoint.hpp"
84 #include "runtime/safepointVerifiers.hpp"
85 #include "runtime/threadSMR.hpp"
86 #include "runtime/vframe.inline.hpp"
87 #include "runtime/vm_version.hpp"
88 #include "utilities/align.hpp"
89 #include "utilities/globalDefinitions.hpp"
90 #include "utilities/growableArray.hpp"
91 #include "utilities/preserveException.hpp"
92 #include "utilities/utf8.hpp"
93 #if INCLUDE_JVMCI
94 #include "jvmci/jvmciJavaClasses.hpp"
95 #endif
96
97 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
98 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
99
100 InjectedField JavaClasses::_injected_fields[] = {
101 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
102 };
103
104 // Register native methods of Object
105 void java_lang_Object::register_natives(TRAPS) {
106 InstanceKlass* obj = vmClasses::Object_klass();
107 Method::register_native(obj, vmSymbols::hashCode_name(),
108 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
109 Method::register_native(obj, vmSymbols::wait_name(),
110 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
111 Method::register_native(obj, vmSymbols::notify_name(),
112 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
113 Method::register_native(obj, vmSymbols::notifyAll_name(),
114 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
115 Method::register_native(obj, vmSymbols::clone_name(),
116 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
117 }
118
119 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
120 return _injected_fields[(int)id].compute_offset();
121 }
122
123 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
124 *field_count = 0;
125
126 vmSymbolID sid = vmSymbols::find_sid(class_name);
127 if (sid == vmSymbolID::NO_SID) {
128 // Only well known classes can inject fields
129 return nullptr;
130 }
131
132 int count = 0;
133 int start = -1;
134
135 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
136 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \
137 count++; \
138 if (start == -1) { \
139 start = (int)InjectedFieldID::klass##_##name##_enum; \
140 } \
141 }
142 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
143 #undef LOOKUP_INJECTED_FIELD
144
145 if (start != -1) {
146 *field_count = count;
147 return _injected_fields + start;
148 }
149 return nullptr;
150 }
151
152
153 // Helpful routine for computing field offsets at run time rather than hardcoding them
154 // Finds local fields only, including static fields. Static field offsets are from the
155 // beginning of the mirror.
156 void JavaClasses::compute_offset(int &dest_offset,
157 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
158 bool is_static) {
159 fieldDescriptor fd;
160 if (ik == nullptr) {
161 ResourceMark rm;
162 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
163 vm_exit_during_initialization("Invalid layout of well-known class");
164 }
165
166 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
167 ResourceMark rm;
168 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
169 name_symbol->as_C_string(), signature_symbol->as_C_string());
170 #ifndef PRODUCT
171 // Prints all fields and offsets
172 Log(class) lt;
173 LogStream ls(lt.error());
174 ik->print_on(&ls);
175 #endif //PRODUCT
176 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
177 }
178 dest_offset = fd.offset();
179 }
180
181 // Overloading to pass name as a string.
182 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
183 const char* name_string, Symbol* signature_symbol,
184 bool is_static) {
185 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
186 if (name == nullptr) {
187 ResourceMark rm;
188 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
189 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
190 }
191 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
192 }
193
194 // java_lang_String
195
196 int java_lang_String::_value_offset;
197 int java_lang_String::_hash_offset;
198 int java_lang_String::_hashIsZero_offset;
199 int java_lang_String::_coder_offset;
200 int java_lang_String::_flags_offset;
201
202 bool java_lang_String::_initialized;
203
204
205 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
206 uint8_t* addr = flags_addr(java_string);
207 uint8_t value = AtomicAccess::load(addr);
208 while ((value & flag_mask) == 0) {
209 uint8_t old_value = value;
210 value |= flag_mask;
211 value = AtomicAccess::cmpxchg(addr, old_value, value);
212 if (value == old_value) return false; // Flag bit changed from 0 to 1.
213 }
214 return true; // Flag bit is already 1.
215 }
216
217 #define STRING_FIELDS_DO(macro) \
218 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
219 macro(_hash_offset, k, "hash", int_signature, false); \
220 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
221 macro(_coder_offset, k, "coder", byte_signature, false);
222
223 void java_lang_String::compute_offsets() {
224 if (_initialized) {
225 return;
226 }
227
228 InstanceKlass* k = vmClasses::String_klass();
229 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
230 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
231
232 _initialized = true;
233 }
234
235 #if INCLUDE_CDS
236 void java_lang_String::serialize_offsets(SerializeClosure* f) {
237 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
238 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
239 f->do_bool(&_initialized);
240 }
241 #endif
242
243 class CompactStringsFixup : public FieldClosure {
244 private:
245 bool _value;
246
247 public:
248 CompactStringsFixup(bool value) : _value(value) {}
249
250 void do_field(fieldDescriptor* fd) {
251 if (fd->name() == vmSymbols::compact_strings_name()) {
252 oop mirror = fd->field_holder()->java_mirror();
253 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String");
254 assert(mirror != nullptr, "String must have mirror already");
255 mirror->bool_field_put(fd->offset(), _value);
256 }
257 }
258 };
259
260 void java_lang_String::set_compact_strings(bool value) {
261 CompactStringsFixup fix(value);
262 vmClasses::String_klass()->do_local_static_fields(&fix);
263 }
264
265 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
266 assert(_initialized, "Must be initialized");
267 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
268
269 // Create the String object first, so there's a chance that the String
270 // and the char array it points to end up in the same cache line.
271 oop obj;
272 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH);
273
274 // Create the char array. The String object must be handlized here
275 // because GC can happen as a result of the allocation attempt.
276 Handle h_obj(THREAD, obj);
277 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
278 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
279
280 // Point the String at the char array
281 obj = h_obj();
282 set_value(obj, buffer);
283 // No need to zero the offset, allocation zero'ed the entire String object
284 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
285 return h_obj;
286 }
287
288 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
289 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
290 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
291 typeArrayOop buffer = value(h_obj());
292 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
293 if (is_latin1) {
294 for (int index = 0; index < length; index++) {
295 buffer->byte_at_put(index, (jbyte)unicode[index]);
296 }
297 } else {
298 for (int index = 0; index < length; index++) {
299 buffer->char_at_put(index, unicode[index]);
300 }
301 }
302
303 #ifdef ASSERT
304 {
305 ResourceMark rm;
306 size_t utf8_len = static_cast<size_t>(length);
307 char* expected = UNICODE::as_utf8(unicode, utf8_len);
308 char* actual = as_utf8_string(h_obj());
309 if (strcmp(expected, actual) != 0) {
310 fatal("Unicode conversion failure: %s --> %s", expected, actual);
311 }
312 }
313 #endif
314
315 return h_obj;
316 }
317
318 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
319 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
320 return h_obj();
321 }
322
323 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
324 if (utf8_str == nullptr) {
325 return Handle();
326 }
327 bool has_multibyte, is_latin1;
328 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
329 if (!CompactStrings) {
330 has_multibyte = true;
331 is_latin1 = false;
332 }
333
334 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
335 if (length > 0) {
336 if (!has_multibyte) {
337 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
338 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
339 } else if (is_latin1) {
340 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
341 } else {
342 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
343 }
344 }
345
346 #ifdef ASSERT
347 // This check is too strict when the input string is not a valid UTF8.
348 // For example, it may be created with arbitrary content via jni_NewStringUTF.
349 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, strlen(utf8_str), /*version_leq_47*/false)) {
350 ResourceMark rm;
351 const char* expected = utf8_str;
352 char* actual = as_utf8_string(h_obj());
353 if (strcmp(expected, actual) != 0) {
354 fatal("String conversion failure: %s --> %s", expected, actual);
355 }
356 }
357 #endif
358
359 return h_obj;
360 }
361
362 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
363 Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
364 return h_obj();
365 }
366
367 Handle java_lang_String::create_from_symbol(const Symbol* symbol, TRAPS) {
368 const char* utf8_str = (char*)symbol->bytes();
369 int utf8_len = symbol->utf8_length();
370
371 bool has_multibyte, is_latin1;
372 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
373 if (!CompactStrings) {
374 has_multibyte = true;
375 is_latin1 = false;
376 }
377
378 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
379 if (length > 0) {
380 if (!has_multibyte) {
381 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
382 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
383 } else if (is_latin1) {
384 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
385 } else {
386 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
387 }
388 }
389
390 #ifdef ASSERT
391 // This check is too strict on older classfile versions
392 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, utf8_len, /*version_leq_47*/false))
393 {
394 ResourceMark rm;
395 const char* expected = symbol->as_utf8();
396 char* actual = as_utf8_string(h_obj());
397 if (strncmp(expected, actual, utf8_len) != 0) {
398 fatal("Symbol conversion failure: %s --> %s", expected, actual);
399 }
400 }
401 #endif
402
403 return h_obj;
404 }
405
406 // Converts a C string to a Java String based on current encoding
407 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
408 assert(str != nullptr, "bad arguments");
409
410 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
411 static to_java_string_fn_t _to_java_string_fn = nullptr;
412
413 if (_to_java_string_fn == nullptr) {
414 void *lib_handle = os::native_java_library();
415 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
416 if (_to_java_string_fn == nullptr) {
417 fatal("JNU_NewStringPlatform missing");
418 }
419 }
420
421 jstring js = nullptr;
422 {
423 JavaThread* thread = THREAD;
424 HandleMark hm(thread);
425 ThreadToNativeFromVM ttn(thread);
426 js = (_to_java_string_fn)(thread->jni_environment(), str);
427 }
428
429 Handle native_platform_string(THREAD, JNIHandles::resolve(js));
430 JNIHandles::destroy_local(js); // destroy local JNIHandle.
431 return native_platform_string;
432 }
433
434 // Converts a Java String to a native C string that can be used for
435 // native OS calls.
436 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
437 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
438 static to_platform_string_fn_t _to_platform_string_fn = nullptr;
439
440 if (_to_platform_string_fn == nullptr) {
441 void *lib_handle = os::native_java_library();
442 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
443 if (_to_platform_string_fn == nullptr) {
444 fatal("GetStringPlatformChars missing");
445 }
446 }
447
448 char *native_platform_string;
449 jstring js;
450 { JavaThread* thread = THREAD;
451 js = (jstring) JNIHandles::make_local(thread, java_string());
452 HandleMark hm(thread);
453 ThreadToNativeFromVM ttn(thread);
454 JNIEnv *env = thread->jni_environment();
455 bool is_copy;
456 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
457 assert(is_copy == JNI_TRUE, "is_copy value changed");
458 }
459
460 // Uses a store barrier and therefore needs to be in vm state
461 JNIHandles::destroy_local(js);
462
463 return native_platform_string;
464 }
465
466 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
467 ResourceMark rm(THREAD);
468 return create_from_str(java_name->as_klass_external_name(), THREAD);
469 }
470
471 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
472 jchar* result = as_unicode_string_or_null(java_string, length);
473 if (result == nullptr) {
474 THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
475 }
476 return result;
477 }
478
479 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
480 typeArrayOop value = java_lang_String::value(java_string);
481 length = java_lang_String::length(java_string, value);
482 bool is_latin1 = java_lang_String::is_latin1(java_string);
483
484 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
485 if (result != nullptr) {
486 if (!is_latin1) {
487 for (int index = 0; index < length; index++) {
488 result[index] = value->char_at(index);
489 }
490 } else {
491 for (int index = 0; index < length; index++) {
492 result[index] = ((jchar) value->byte_at(index)) & 0xff;
493 }
494 }
495 }
496 return result;
497 }
498
499 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
500 // The hash and hashIsZero fields are subject to a benign data race,
501 // making it crucial to ensure that any observable result of the
502 // calculation in this method stays correct under any possible read of
503 // these fields. Necessary restrictions to allow this to be correct
504 // without explicit memory fences or similar concurrency primitives is
505 // that we can ever only write to one of these two fields for a given
506 // String instance, and that the computation is idempotent and derived
507 // from immutable state
508 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
509 if (java_lang_String::hash_is_set(java_string)) {
510 return java_string->int_field(_hash_offset);
511 }
512
513 typeArrayOop value = java_lang_String::value(java_string);
514 int length = java_lang_String::length(java_string, value);
515 bool is_latin1 = java_lang_String::is_latin1(java_string);
516
517 unsigned int hash = 0;
518 if (length > 0) {
519 if (is_latin1) {
520 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
521 } else {
522 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
523 }
524 }
525
526 if (update) {
527 if (hash != 0) {
528 java_string->int_field_put(_hash_offset, hash);
529 } else {
530 java_string->bool_field_put(_hashIsZero_offset, true);
531 }
532 }
533 return hash;
534 }
535
536 unsigned int java_lang_String::hash_code(oop java_string) {
537 return hash_code_impl(java_string, /*update=*/true);
538 }
539
540 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
541 return hash_code_impl(java_string, /*update=*/false);
542 }
543
544
545 char* java_lang_String::as_quoted_ascii(oop java_string) {
546 typeArrayOop value = java_lang_String::value(java_string);
547 int length = java_lang_String::length(java_string, value);
548 bool is_latin1 = java_lang_String::is_latin1(java_string);
549
550 if (length == 0) return nullptr;
551
552 char* result;
553 size_t result_length;
554 if (!is_latin1) {
555 jchar* base = value->char_at_addr(0);
556 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
557 result = NEW_RESOURCE_ARRAY(char, result_length);
558 UNICODE::as_quoted_ascii(base, length, result, result_length);
559 } else {
560 jbyte* base = value->byte_at_addr(0);
561 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
562 result = NEW_RESOURCE_ARRAY(char, result_length);
563 UNICODE::as_quoted_ascii(base, length, result, result_length);
564 }
565 assert(result_length >= (size_t)length + 1, "must not be shorter");
566 assert(result_length == strlen(result) + 1, "must match");
567 return result;
568 }
569
570 Symbol* java_lang_String::as_symbol(oop java_string) {
571 typeArrayOop value = java_lang_String::value(java_string);
572 int length = java_lang_String::length(java_string, value);
573 bool is_latin1 = java_lang_String::is_latin1(java_string);
574 if (!is_latin1) {
575 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
576 Symbol* sym = SymbolTable::new_symbol(base, length);
577 return sym;
578 } else {
579 ResourceMark rm;
580 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
581 size_t utf8_len = static_cast<size_t>(length);
582 const char* base = UNICODE::as_utf8(position, utf8_len);
583 Symbol* sym = SymbolTable::new_symbol(base, checked_cast<int>(utf8_len));
584 return sym;
585 }
586 }
587
588 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
589 typeArrayOop value = java_lang_String::value(java_string);
590 int length = java_lang_String::length(java_string, value);
591 bool is_latin1 = java_lang_String::is_latin1(java_string);
592 if (!is_latin1) {
593 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
594 return SymbolTable::probe_unicode(base, length);
595 } else {
596 ResourceMark rm;
597 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
598 size_t utf8_len = static_cast<size_t>(length);
599 const char* base = UNICODE::as_utf8(position, utf8_len);
600 return SymbolTable::probe(base, checked_cast<int>(utf8_len));
601 }
602 }
603
604 size_t java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
605 assert(value_equals(value, java_lang_String::value(java_string)),
606 "value must be same as java_lang_String::value(java_string)");
607 int length = java_lang_String::length(java_string, value);
608 if (length == 0) {
609 return 0;
610 }
611 if (!java_lang_String::is_latin1(java_string)) {
612 return UNICODE::utf8_length(value->char_at_addr(0), length);
613 } else {
614 return UNICODE::utf8_length(value->byte_at_addr(0), length);
615 }
616 }
617
618 size_t java_lang_String::utf8_length(oop java_string) {
619 typeArrayOop value = java_lang_String::value(java_string);
620 return utf8_length(java_string, value);
621 }
622
623 int java_lang_String::utf8_length_as_int(oop java_string) {
624 typeArrayOop value = java_lang_String::value(java_string);
625 return utf8_length_as_int(java_string, value);
626 }
627
628 int java_lang_String::utf8_length_as_int(oop java_string, typeArrayOop value) {
629 assert(value_equals(value, java_lang_String::value(java_string)),
630 "value must be same as java_lang_String::value(java_string)");
631 int length = java_lang_String::length(java_string, value);
632 if (length == 0) {
633 return 0;
634 }
635 if (!java_lang_String::is_latin1(java_string)) {
636 return UNICODE::utf8_length_as_int(value->char_at_addr(0), length);
637 } else {
638 return UNICODE::utf8_length_as_int(value->byte_at_addr(0), length);
639 }
640 }
641
642 char* java_lang_String::as_utf8_string(oop java_string) {
643 size_t length;
644 return as_utf8_string(java_string, length);
645 }
646
647 char* java_lang_String::as_utf8_string(oop java_string, size_t& length) {
648 typeArrayOop value = java_lang_String::value(java_string);
649 // `length` is used as the incoming number of characters to
650 // convert, and then set as the number of bytes in the UTF8 sequence.
651 length = java_lang_String::length(java_string, value);
652 bool is_latin1 = java_lang_String::is_latin1(java_string);
653 if (!is_latin1) {
654 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
655 return UNICODE::as_utf8(position, length);
656 } else {
657 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
658 return UNICODE::as_utf8(position, length);
659 }
660 }
661
662 // Uses a provided buffer if it's sufficiently large, otherwise allocates
663 // a resource array to fit
664 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& utf8_len) {
665 typeArrayOop value = java_lang_String::value(java_string);
666 int len = java_lang_String::length(java_string, value);
667 bool is_latin1 = java_lang_String::is_latin1(java_string);
668 if (!is_latin1) {
669 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
670 utf8_len = UNICODE::utf8_length(position, len);
671 if (utf8_len >= buflen) {
672 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
673 }
674 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
675 } else {
676 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
677 utf8_len = UNICODE::utf8_length(position, len);
678 if (utf8_len >= buflen) {
679 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
680 }
681 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
682 }
683 }
684
685 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen) {
686 assert(value_equals(value, java_lang_String::value(java_string)),
687 "value must be same as java_lang_String::value(java_string)");
688 int length = java_lang_String::length(java_string, value);
689 bool is_latin1 = java_lang_String::is_latin1(java_string);
690 if (!is_latin1) {
691 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
692 return UNICODE::as_utf8(position, length, buf, buflen);
693 } else {
694 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
695 return UNICODE::as_utf8(position, length, buf, buflen);
696 }
697 }
698
699 char* java_lang_String::as_utf8_string(oop java_string, char* buf, size_t buflen) {
700 typeArrayOop value = java_lang_String::value(java_string);
701 return as_utf8_string(java_string, value, buf, buflen);
702 }
703
704 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
705 // `length` is used as the incoming number of characters to
706 // convert, and then set as the number of bytes in the UTF8 sequence.
707 size_t length = static_cast<size_t>(len);
708 typeArrayOop value = java_lang_String::value(java_string);
709 bool is_latin1 = java_lang_String::is_latin1(java_string);
710 assert(start + len <= java_lang_String::length(java_string), "just checking");
711 if (!is_latin1) {
712 jchar* position = value->char_at_addr(start);
713 return UNICODE::as_utf8(position, length);
714 } else {
715 jbyte* position = value->byte_at_addr(start);
716 return UNICODE::as_utf8(position, length);
717 }
718 }
719
720 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen) {
721 assert(value_equals(value, java_lang_String::value(java_string)),
722 "value must be same as java_lang_String::value(java_string)");
723 assert(start + len <= java_lang_String::length(java_string), "just checking");
724 bool is_latin1 = java_lang_String::is_latin1(java_string);
725 if (!is_latin1) {
726 jchar* position = value->char_at_addr(start);
727 return UNICODE::as_utf8(position, len, buf, buflen);
728 } else {
729 jbyte* position = value->byte_at_addr(start);
730 return UNICODE::as_utf8(position, len, buf, buflen);
731 }
732 }
733
734 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
735 assert(java_string->klass() == vmClasses::String_klass(),
736 "must be java_string");
737 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
738 int length = java_lang_String::length(java_string, value);
739 if (length != len) {
740 return false;
741 }
742 bool is_latin1 = java_lang_String::is_latin1(java_string);
743 if (!is_latin1) {
744 for (int i = 0; i < len; i++) {
745 if (value->char_at(i) != chars[i]) {
746 return false;
747 }
748 }
749 } else {
750 for (int i = 0; i < len; i++) {
751 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
752 return false;
753 }
754 }
755 }
756 return true;
757 }
758
759 bool java_lang_String::equals(oop java_string, const char* utf8_string, size_t utf8_len) {
760 assert(java_string->klass() == vmClasses::String_klass(),
761 "must be java_string");
762 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
763 int length = java_lang_String::length(java_string, value);
764 int unicode_length = UTF8::unicode_length(utf8_string, utf8_len);
765 if (length != unicode_length) {
766 return false;
767 }
768 bool is_latin1 = java_lang_String::is_latin1(java_string);
769 jchar c;
770 if (!is_latin1) {
771 for (int i = 0; i < unicode_length; i++) {
772 utf8_string = UTF8::next(utf8_string, &c);
773 if (value->char_at(i) != c) {
774 return false;
775 }
776 }
777 } else {
778 for (int i = 0; i < unicode_length; i++) {
779 utf8_string = UTF8::next(utf8_string, &c);
780 if ((((jchar) value->byte_at(i)) & 0xff) != c) {
781 return false;
782 }
783 }
784 }
785 return true;
786 }
787
788 bool java_lang_String::equals(oop str1, oop str2) {
789 assert(str1->klass() == vmClasses::String_klass(),
790 "must be java String");
791 assert(str2->klass() == vmClasses::String_klass(),
792 "must be java String");
793 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
794 bool is_latin1 = java_lang_String::is_latin1(str1);
795 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
796 bool is_latin2 = java_lang_String::is_latin1(str2);
797
798 if (is_latin1 != is_latin2) {
799 // Strings with different coders are never equal.
800 return false;
801 }
802 return value_equals(value1, value2);
803 }
804
805 // Print the given string to the given outputStream, limiting the output to
806 // at most max_length of the string's characters. If the length exceeds the
807 // limit we print an abridged version of the string with the "middle" elided
808 // and replaced by " ... (N characters ommitted) ... ". If max_length is odd
809 // it is treated as max_length-1.
810 void java_lang_String::print(oop java_string, outputStream* st, int max_length) {
811 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
812 // We need at least two characters to print A ... B
813 assert(max_length > 1, "invalid max_length: %d", max_length);
814
815 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
816
817 if (value == nullptr) {
818 // This can happen if, e.g., printing a String
819 // object before its initializer has been called
820 st->print("nullptr");
821 return;
822 }
823
824 int length = java_lang_String::length(java_string, value);
825 bool is_latin1 = java_lang_String::is_latin1(java_string);
826
827 bool abridge = length > max_length;
828
829 st->print("\"");
830 for (int index = 0; index < length; index++) {
831 // If we need to abridge and we've printed half the allowed characters
832 // then jump to the tail of the string.
833 if (abridge && index >= max_length / 2) {
834 st->print(" ... (%d characters ommitted) ... ", length - 2 * (max_length / 2));
835 index = length - (max_length / 2);
836 abridge = false; // only do this once
837 }
838 jchar c = (!is_latin1) ? value->char_at(index) :
839 ((jchar) value->byte_at(index)) & 0xff;
840 if (c < ' ') {
841 st->print("\\x%02X", c); // print control characters e.g. \x0A
842 } else {
843 st->print("%c", c);
844 }
845 }
846 st->print("\"");
847
848 if (length > max_length) {
849 st->print(" (abridged) ");
850 }
851 }
852
853 // java_lang_Class
854
855 int java_lang_Class::_klass_offset;
856 int java_lang_Class::_array_klass_offset;
857 int java_lang_Class::_oop_size_offset;
858 int java_lang_Class::_static_oop_field_count_offset;
859 int java_lang_Class::_class_loader_offset;
860 int java_lang_Class::_module_offset;
861 int java_lang_Class::_protection_domain_offset;
862 int java_lang_Class::_component_mirror_offset;
863 int java_lang_Class::_init_lock_offset;
864 int java_lang_Class::_signers_offset;
865 int java_lang_Class::_name_offset;
866 int java_lang_Class::_source_file_offset;
867 int java_lang_Class::_classData_offset;
868 int java_lang_Class::_classRedefinedCount_offset;
869 int java_lang_Class::_reflectionData_offset;
870 int java_lang_Class::_modifiers_offset;
871 int java_lang_Class::_is_primitive_offset;
872 int java_lang_Class::_raw_access_flags_offset;
873
874 bool java_lang_Class::_offsets_computed = false;
875 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
876 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
877
878 #ifdef ASSERT
879 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
880 assert(fd->has_initial_value(), "caller should have checked this");
881 assert(fd->field_type() == T_OBJECT, "caller should have checked this");
882 assert(fd->signature() == vmSymbols::string_signature(), "just checking");
883 }
884 #endif
885
886 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
887 DEBUG_ONLY(assert_valid_static_string_field(fd);)
888 oop string = fd->string_initial_value(CHECK);
889 mirror()->obj_field_put(fd->offset(), string);
890 }
891
892 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
893 assert(fd->has_initial_value(), "caller should have checked this");
894 BasicType t = fd->field_type();
895 switch (t) {
896 case T_BYTE:
897 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value()));
898 break;
899 case T_BOOLEAN:
900 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value()));
901 break;
902 case T_CHAR:
903 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value()));
904 break;
905 case T_SHORT:
906 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value()));
907 break;
908 case T_INT:
909 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
910 break;
911 case T_FLOAT:
912 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
913 break;
914 case T_DOUBLE:
915 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
916 break;
917 case T_LONG:
918 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
919 break;
920 default:
921 // Illegal ConstantValue attribute in class file should have been
922 // caught during classfile parsing.
923 ShouldNotReachHere();
924 }
925 }
926
927 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
928 assert(mirror.not_null() && fd->is_static(), "just checking");
929 if (fd->has_initial_value()) {
930 if (fd->field_type() != T_OBJECT) {
931 initialize_static_primitive_field(fd, mirror);
932 } else {
933 initialize_static_string_field(fd, mirror, CHECK);
934 }
935 }
936 }
937
938 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
939 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
940
941 // If the offset was read from the shared archive, it was fixed up already
942 if (!k->in_aot_cache()) {
943 if (k->is_instance_klass()) {
944 // During bootstrap, java.lang.Class wasn't loaded so static field
945 // offsets were computed without the size added it. Go back and
946 // update all the static field offsets to included the size.
947
948 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
949 // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
950 // static fields offsets are updated in this array before reencoding everything into
951 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
952
953 int java_fields;
954 int injected_fields;
955 InstanceKlass* ik = InstanceKlass::cast(k);
956 GrowableArray<FieldInfo>* fields =
957 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
958 &java_fields, &injected_fields);
959 for (int i = 0; i < fields->length(); i++) {
960 FieldInfo* fi = fields->adr_at(i);
961 if (fi->access_flags().is_static()) {
962 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
963 }
964 }
965 Array<u1>* old_stream = ik->fieldinfo_stream();
966 assert(fields->length() == (java_fields + injected_fields), "Must be");
967 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
968 ik->set_fieldinfo_stream(new_fis);
969 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
970
971 Array<u1>* old_table = ik->fieldinfo_search_table();
972 Array<u1>* search_table = FieldInfoStream::create_search_table(ik->constants(), new_fis, k->class_loader_data(), CHECK);
973 ik->set_fieldinfo_search_table(search_table);
974 MetadataFactory::free_array<u1>(k->class_loader_data(), old_table);
975
976 DEBUG_ONLY(FieldInfoStream::validate_search_table(ik->constants(), new_fis, search_table));
977 }
978 }
979
980 if (k->in_aot_cache() && k->has_archived_mirror_index()) {
981 if (ArchiveHeapLoader::is_in_use()) {
982 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
983 assert(present, "Missing archived mirror for %s", k->external_name());
984 return;
985 } else {
986 k->clear_java_mirror_handle();
987 k->clear_archived_mirror_index();
988 }
989 }
990 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
991 }
992
993 void java_lang_Class::initialize_mirror_fields(InstanceKlass* ik,
994 Handle mirror,
995 Handle protection_domain,
996 Handle classData,
997 TRAPS) {
998 // Allocate a simple java object for a lock.
999 // This needs to be a java object because during class initialization
1000 // it can be held across a java call.
1001 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
1002 set_init_lock(mirror(), r);
1003
1004 // Set protection domain also
1005 set_protection_domain(mirror(), protection_domain());
1006
1007 // Initialize static fields
1008 ik->do_local_static_fields(&initialize_static_field, mirror, CHECK);
1009
1010 // Set classData
1011 set_class_data(mirror(), classData());
1012 }
1013
1014 // Set the java.lang.Module module field in the java_lang_Class mirror
1015 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
1016 if (CDSConfig::is_using_aot_linked_classes()) {
1017 oop archived_module = java_lang_Class::module(mirror());
1018 if (archived_module != nullptr) {
1019 precond(module() == nullptr || module() == archived_module);
1020 precond(AOTMetaspace::in_aot_cache_static_region((void*)k));
1021 return;
1022 }
1023 }
1024
1025 if (module.is_null()) {
1026 // During startup, the module may be null only if java.base has not been defined yet.
1027 // Put the class on the fixup_module_list to patch later when the java.lang.Module
1028 // for java.base is known. But note that since we captured the null module another
1029 // thread may have completed that initialization.
1030
1031 // With AOT-linked classes, java.base should have been defined before the
1032 // VM loads any classes.
1033 precond(!CDSConfig::is_using_aot_linked_classes());
1034
1035 bool javabase_was_defined = false;
1036 {
1037 MutexLocker m1(current, Module_lock);
1038 // Keep list of classes needing java.base module fixup
1039 if (!ModuleEntryTable::javabase_defined()) {
1040 assert(k->java_mirror() != nullptr, "Class's mirror is null");
1041 k->class_loader_data()->inc_keep_alive_ref_count();
1042 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
1043 fixup_module_field_list()->push(k);
1044 } else {
1045 javabase_was_defined = true;
1046 }
1047 }
1048
1049 // If java.base was already defined then patch this particular class with java.base.
1050 if (javabase_was_defined) {
1051 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
1052 assert(javabase_entry != nullptr && javabase_entry->module_oop() != nullptr,
1053 "Setting class module field, " JAVA_BASE_NAME " should be defined");
1054 Handle javabase_handle(current, javabase_entry->module_oop());
1055 set_module(mirror(), javabase_handle());
1056 }
1057 } else {
1058 assert(Universe::is_module_initialized() ||
1059 (ModuleEntryTable::javabase_defined() &&
1060 (module() == ModuleEntryTable::javabase_moduleEntry()->module_oop())),
1061 "Incorrect java.lang.Module specification while creating mirror");
1062 set_module(mirror(), module());
1063 }
1064 }
1065
1066 // Statically allocate fixup lists because they always get created.
1067 void java_lang_Class::allocate_fixup_lists() {
1068 if (!CDSConfig::is_using_aot_linked_classes()) {
1069 // fixup_mirror_list() is not used when we have preloaded classes. See
1070 // Universe::fixup_mirrors().
1071 GrowableArray<Klass*>* mirror_list =
1072 new (mtClass) GrowableArray<Klass*>(40, mtClass);
1073 set_fixup_mirror_list(mirror_list);
1074
1075 // With AOT-linked classes, java.base module is defined before any class
1076 // is loaded, so there's no need for fixup_module_field_list().
1077 GrowableArray<Klass*>* module_list =
1078 new (mtModule) GrowableArray<Klass*>(500, mtModule);
1079 set_fixup_module_field_list(module_list);
1080 }
1081 }
1082
1083 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
1084 Handle& mirror, Handle& comp_mirror, TRAPS) {
1085 // Allocate mirror (java.lang.Class instance)
1086 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
1087 mirror = Handle(THREAD, mirror_oop);
1088
1089 // Setup indirection from mirror->klass
1090 set_klass(mirror(), k);
1091
1092 // Set the modifiers flag.
1093 u2 computed_modifiers = k->compute_modifier_flags();
1094 set_modifiers(mirror(), computed_modifiers);
1095 // Set the raw access_flags, this is used by reflection instead of modifier flags.
1096 // The Java code for array classes gets the access flags from the element type.
1097 assert(!k->is_array_klass() || k->access_flags().as_unsigned_short() == 0, "access flags are not set for arrays");
1098 set_raw_access_flags(mirror(), k->access_flags().as_unsigned_short());
1099
1100 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
1101 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
1102
1103 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
1104
1105 // It might also have a component mirror. This mirror must already exist.
1106 if (k->is_array_klass()) {
1107 if (k->is_typeArray_klass()) {
1108 BasicType type = TypeArrayKlass::cast(k)->element_type();
1109 if (is_scratch) {
1110 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
1111 } else {
1112 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
1113 }
1114 } else {
1115 assert(k->is_objArray_klass(), "Must be");
1116 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1117 assert(element_klass != nullptr, "Must have an element klass");
1118 if (is_scratch) {
1119 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1120 } else {
1121 comp_mirror = Handle(THREAD, element_klass->java_mirror());
1122 }
1123 }
1124 assert(comp_mirror() != nullptr, "must have a mirror");
1125
1126 // Two-way link between the array klass and its component mirror:
1127 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1128 set_component_mirror(mirror(), comp_mirror());
1129 // See below for ordering dependencies between field array_klass in component mirror
1130 // and java_mirror in this klass.
1131 } else {
1132 assert(k->is_instance_klass(), "Must be");
1133 initialize_mirror_fields(InstanceKlass::cast(k), mirror, protection_domain, classData, THREAD);
1134 if (HAS_PENDING_EXCEPTION) {
1135 // If any of the fields throws an exception like OOM remove the klass field
1136 // from the mirror so GC doesn't follow it after the klass has been deallocated.
1137 // This mirror looks like a primitive type, which logically it is because it
1138 // it represents no class.
1139 set_klass(mirror(), nullptr);
1140 return;
1141 }
1142 }
1143 }
1144
1145 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1146 Handle module, Handle protection_domain,
1147 Handle classData, TRAPS) {
1148 assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1149 assert(k->java_mirror() == nullptr, "should only assign mirror once");
1150
1151 // Class_klass has to be loaded because it is used to allocate
1152 // the mirror.
1153 if (vmClasses::Class_klass_loaded()) {
1154 Handle mirror;
1155 Handle comp_mirror;
1156
1157 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1158
1159 // set the classLoader field in the java_lang_Class instance
1160 assert(class_loader() == k->class_loader(), "should be same");
1161 set_class_loader(mirror(), class_loader());
1162
1163 // Setup indirection from klass->mirror
1164 // after any exceptions can happen during allocations.
1165 k->set_java_mirror(mirror);
1166
1167 // Set the module field in the java_lang_Class instance. This must be done
1168 // after the mirror is set.
1169 set_mirror_module_field(THREAD, k, mirror, module);
1170
1171 if (comp_mirror() != nullptr) {
1172 // Set after k->java_mirror() is published, because compiled code running
1173 // concurrently doesn't expect a k to have a null java_mirror.
1174 release_set_array_klass(comp_mirror(), k);
1175 }
1176 if (CDSConfig::is_dumping_heap()) {
1177 create_scratch_mirror(k, CHECK);
1178 }
1179 } else {
1180 assert(!CDSConfig::is_using_aot_linked_classes(), "should not come here");
1181 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1182 fixup_mirror_list()->push(k);
1183 }
1184 }
1185
1186 #if INCLUDE_CDS_JAVA_HEAP
1187 // The "scratch mirror" stores the states of the mirror object that can be
1188 // decided at dump time (such as the initial values of the static fields, the
1189 // component mirror, etc). At runtime, more information is added to it by
1190 // java_lang_Class::restore_archived_mirror().
1191 //
1192 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1193 // produces the same result as /*runtime*/create_mirror().
1194 //
1195 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1196 // latter may contain dumptime-specific information that cannot be archived
1197 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1198 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1199 if (k->class_loader() != nullptr &&
1200 k->class_loader() != SystemDictionary::java_platform_loader() &&
1201 k->class_loader() != SystemDictionary::java_system_loader()) {
1202 // We only archive the mirrors of classes loaded by the built-in loaders
1203 return;
1204 }
1205
1206 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1207 Handle mirror;
1208 Handle comp_mirror;
1209 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1210
1211 if (comp_mirror() != nullptr) {
1212 release_set_array_klass(comp_mirror(), k);
1213 }
1214
1215 HeapShared::set_scratch_java_mirror(k, mirror());
1216 }
1217
1218 // Returns true if the mirror is updated, false if no archived mirror
1219 // data is present. After the archived mirror object is restored, the
1220 // shared klass' _has_raw_archived_mirror flag is cleared.
1221 bool java_lang_Class::restore_archived_mirror(Klass *k,
1222 Handle class_loader, Handle module,
1223 Handle protection_domain, TRAPS) {
1224 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1225 // see more details in vmClasses::resolve_all().
1226 if (!vmClasses::Class_klass_loaded() && !CDSConfig::is_using_aot_linked_classes()) {
1227 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1228 fixup_mirror_list()->push(k);
1229 return true;
1230 }
1231
1232 oop m = k->archived_java_mirror();
1233 assert(m != nullptr, "must have stored non-null archived mirror");
1234
1235 // Sanity: clear it now to prevent re-initialization if any of the following fails
1236 k->clear_archived_mirror_index();
1237
1238 // mirror is archived, restore
1239 log_debug(aot, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1240 assert(as_Klass(m) == k, "must be");
1241 Handle mirror(THREAD, m);
1242
1243 if (!k->is_array_klass()) {
1244 // - local static final fields with initial values were initialized at dump time
1245
1246 // create the init_lock
1247 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1248 set_init_lock(mirror(), r);
1249
1250 if (protection_domain.not_null()) {
1251 set_protection_domain(mirror(), protection_domain());
1252 }
1253 }
1254
1255 assert(class_loader() == k->class_loader(), "should be same");
1256 if (class_loader.not_null()) {
1257 set_class_loader(mirror(), class_loader());
1258 }
1259
1260 k->set_java_mirror(mirror);
1261
1262 set_mirror_module_field(THREAD, k, mirror, module);
1263
1264 if (log_is_enabled(Trace, aot, heap, mirror)) {
1265 ResourceMark rm(THREAD);
1266 log_trace(aot, heap, mirror)(
1267 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1268 }
1269
1270 return true;
1271 }
1272 #endif // INCLUDE_CDS_JAVA_HEAP
1273
1274 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1275 assert(_module_offset != 0, "must have been computed already");
1276 set_module(k->java_mirror(), module());
1277 }
1278
1279 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1280 assert(_oop_size_offset != 0, "must be set");
1281 assert(size > 0, "Oop size must be greater than zero, not %zu", size);
1282 assert(size <= INT_MAX, "Lossy conversion: %zu", size);
1283 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1284 }
1285
1286 int java_lang_Class::static_oop_field_count(oop java_class) {
1287 assert(_static_oop_field_count_offset != 0, "must be set");
1288 return java_class->int_field(_static_oop_field_count_offset);
1289 }
1290
1291 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1292 assert(_static_oop_field_count_offset != 0, "must be set");
1293 java_class->int_field_put(_static_oop_field_count_offset, size);
1294 }
1295
1296 oop java_lang_Class::protection_domain(oop java_class) {
1297 assert(_protection_domain_offset != 0, "must be set");
1298 return java_class->obj_field(_protection_domain_offset);
1299 }
1300 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1301 assert(_protection_domain_offset != 0, "must be set");
1302 java_class->obj_field_put(_protection_domain_offset, pd);
1303 }
1304
1305 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1306 assert(_component_mirror_offset != 0, "must be set");
1307 assert(java_lang_Class::as_Klass(java_class) != nullptr &&
1308 java_lang_Class::as_Klass(java_class)->is_array_klass(), "must be");
1309 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1310 }
1311
1312 oop java_lang_Class::component_mirror(oop java_class) {
1313 assert(_component_mirror_offset != 0, "must be set");
1314 return java_class->obj_field(_component_mirror_offset);
1315 }
1316
1317 oop java_lang_Class::init_lock(oop java_class) {
1318 assert(_init_lock_offset != 0, "must be set");
1319 return java_class->obj_field(_init_lock_offset);
1320 }
1321 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1322 assert(_init_lock_offset != 0, "must be set");
1323 java_class->obj_field_put(_init_lock_offset, init_lock);
1324 }
1325
1326 objArrayOop java_lang_Class::signers(oop java_class) {
1327 assert(_signers_offset != 0, "must be set");
1328 return (objArrayOop)java_class->obj_field(_signers_offset);
1329 }
1330
1331 oop java_lang_Class::class_data(oop java_class) {
1332 assert(_classData_offset != 0, "must be set");
1333 return java_class->obj_field(_classData_offset);
1334 }
1335 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1336 assert(_classData_offset != 0, "must be set");
1337 java_class->obj_field_put(_classData_offset, class_data);
1338 }
1339
1340 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::_timeout_offset;
2119 int java_lang_VirtualThread::_objectWaiter_offset;
2120
2121 #define VTHREAD_FIELDS_DO(macro) \
2122 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \
2123 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \
2124 macro(_continuation_offset, k, "cont", continuation_signature, false); \
2125 macro(_state_offset, k, "state", int_signature, false); \
2126 macro(_next_offset, k, "next", vthread_signature, false); \
2127 macro(_onWaitingList_offset, k, "onWaitingList", bool_signature, false); \
2128 macro(_notified_offset, k, "notified", bool_signature, false); \
2129 macro(_timeout_offset, k, "timeout", long_signature, false);
2130
2131
2132 void java_lang_VirtualThread::compute_offsets() {
2133 InstanceKlass* k = vmClasses::VirtualThread_klass();
2134 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2135 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2136 }
2137
2138 bool java_lang_VirtualThread::is_instance(oop obj) {
2139 return obj != nullptr && is_subclass(obj->klass());
2140 }
2141
2142 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
2143 oop thread = vthread->obj_field(_carrierThread_offset);
2144 return thread;
2145 }
2146
2147 oop java_lang_VirtualThread::continuation(oop vthread) {
2148 oop cont = vthread->obj_field(_continuation_offset);
2149 return cont;
2150 }
2151
2152 int java_lang_VirtualThread::state(oop vthread) {
2153 return vthread->int_field_acquire(_state_offset);
2154 }
2155
2156 void java_lang_VirtualThread::set_state(oop vthread, int state) {
2157 vthread->release_int_field_put(_state_offset, state);
2158 }
2159
2160 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) {
2161 jint* addr = vthread->field_addr<jint>(_state_offset);
2162 int res = AtomicAccess::cmpxchg(addr, old_state, new_state);
2163 return res;
2164 }
2165
2166 oop java_lang_VirtualThread::next(oop vthread) {
2167 return vthread->obj_field(_next_offset);
2168 }
2169
2170 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) {
2171 vthread->obj_field_put(_next_offset, next_vthread);
2172 }
2173
2174 // Add vthread to the waiting list if it's not already in it. Multiple threads
2175 // could be trying to add vthread to the list at the same time, so we control
2176 // access with a cmpxchg on onWaitingList. The winner adds vthread to the list.
2177 // Method returns true if we added vthread to the list, false otherwise.
2178 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) {
2179 jboolean* addr = vthread->field_addr<jboolean>(_onWaitingList_offset);
2180 jboolean vthread_on_list = AtomicAccess::load(addr);
2181 if (!vthread_on_list) {
2182 vthread_on_list = AtomicAccess::cmpxchg(addr, (jboolean)JNI_FALSE, (jboolean)JNI_TRUE);
2183 if (!vthread_on_list) {
2184 for (;;) {
2185 oop head = list_head.resolve();
2186 java_lang_VirtualThread::set_next(vthread, head);
2187 if (list_head.cmpxchg(head, vthread) == head) return true;
2188 }
2189 }
2190 }
2191 return false; // already on waiting list
2192 }
2193
2194 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) {
2195 vthread->bool_field_put_volatile(_notified_offset, value);
2196 }
2197
2198 jlong java_lang_VirtualThread::timeout(oop vthread) {
2199 return vthread->long_field(_timeout_offset);
2200 }
2201
2202 void java_lang_VirtualThread::set_timeout(oop vthread, jlong value) {
2203 vthread->long_field_put(_timeout_offset, value);
2204 }
2205
2206 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2207 JavaThreadStatus status = JavaThreadStatus::NEW;
2208 switch (state & ~SUSPENDED) {
2209 case NEW:
2210 status = JavaThreadStatus::NEW;
2211 break;
2212 case STARTED:
2213 case RUNNING:
2214 case PARKING:
2215 case TIMED_PARKING:
2216 case UNPARKED:
2217 case YIELDING:
2218 case YIELDED:
2219 case UNBLOCKED:
2220 case WAITING:
2221 case TIMED_WAITING:
2222 status = JavaThreadStatus::RUNNABLE;
2223 break;
2224 case PARKED:
2225 case PINNED:
2226 status = JavaThreadStatus::PARKED;
2227 break;
2228 case TIMED_PARKED:
2229 case TIMED_PINNED:
2230 status = JavaThreadStatus::PARKED_TIMED;
2231 break;
2232 case BLOCKING:
2233 case BLOCKED:
2234 status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER;
2235 break;
2236 case WAIT:
2237 status = JavaThreadStatus::IN_OBJECT_WAIT;
2238 break;
2239 case TIMED_WAIT:
2240 status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED;
2241 break;
2242 case TERMINATED:
2243 status = JavaThreadStatus::TERMINATED;
2244 break;
2245 default:
2246 ShouldNotReachHere();
2247 }
2248 return status;
2249 }
2250
2251 ObjectMonitor* java_lang_VirtualThread::current_pending_monitor(oop vthread) {
2252 ObjectWaiter* waiter = objectWaiter(vthread);
2253 if (waiter != nullptr && waiter->at_monitorenter()) {
2254 return waiter->monitor();
2255 }
2256 return nullptr;
2257 }
2258
2259 ObjectMonitor* java_lang_VirtualThread::current_waiting_monitor(oop vthread) {
2260 ObjectWaiter* waiter = objectWaiter(vthread);
2261 if (waiter != nullptr && waiter->is_wait()) {
2262 return waiter->monitor();
2263 }
2264 return nullptr;
2265 }
2266
2267 bool java_lang_VirtualThread::is_preempted(oop vthread) {
2268 oop continuation = java_lang_VirtualThread::continuation(vthread);
2269 assert(continuation != nullptr, "vthread with no continuation");
2270 stackChunkOop chunk = jdk_internal_vm_Continuation::tail(continuation);
2271 return chunk != nullptr && chunk->preempted();
2272 }
2273
2274 #if INCLUDE_CDS
2275 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2276 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2277 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2278 }
2279 #endif
2280
2281 // java_lang_Throwable
2282
2283 int java_lang_Throwable::_backtrace_offset;
2284 int java_lang_Throwable::_detailMessage_offset;
2285 int java_lang_Throwable::_stackTrace_offset;
2286 int java_lang_Throwable::_depth_offset;
2287 int java_lang_Throwable::_cause_offset;
2288 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2289
2290 #define THROWABLE_FIELDS_DO(macro) \
2291 macro(_backtrace_offset, k, "backtrace", object_signature, false); \
2292 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \
2293 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2294 macro(_depth_offset, k, "depth", int_signature, false); \
2295 macro(_cause_offset, k, "cause", throwable_signature, false); \
2296 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2297
2298 void java_lang_Throwable::compute_offsets() {
2299 InstanceKlass* k = vmClasses::Throwable_klass();
2300 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2301 }
2302
2303 #if INCLUDE_CDS
2304 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2305 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2306 }
2307 #endif
2308
2309 oop java_lang_Throwable::unassigned_stacktrace() {
2310 InstanceKlass* ik = vmClasses::Throwable_klass();
2311 oop base = ik->static_field_base_raw();
2312 return base->obj_field(_static_unassigned_stacktrace_offset);
2313 }
2314
2315 oop java_lang_Throwable::backtrace(oop throwable) {
2316 return throwable->obj_field_acquire(_backtrace_offset);
2317 }
2318
2319
2320 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2321 throwable->release_obj_field_put(_backtrace_offset, value);
2322 }
2323
2324 int java_lang_Throwable::depth(oop throwable) {
2325 return throwable->int_field(_depth_offset);
2326 }
2327
2328 void java_lang_Throwable::set_depth(oop throwable, int value) {
2329 throwable->int_field_put(_depth_offset, value);
2330 }
2331
2332 oop java_lang_Throwable::message(oop throwable) {
2333 return throwable->obj_field(_detailMessage_offset);
2334 }
2335
2336 const char* java_lang_Throwable::message_as_utf8(oop throwable) {
2337 oop msg = java_lang_Throwable::message(throwable);
2338 const char* msg_utf8 = nullptr;
2339 if (msg != nullptr) {
2340 msg_utf8 = java_lang_String::as_utf8_string(msg);
2341 }
2342 return msg_utf8;
2343 }
2344
2345 oop java_lang_Throwable::cause(oop throwable) {
2346 return throwable->obj_field(_cause_offset);
2347 }
2348
2349 void java_lang_Throwable::set_message(oop throwable, oop value) {
2350 throwable->obj_field_put(_detailMessage_offset, value);
2351 }
2352
2353
2354 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2355 throwable->obj_field_put(_stackTrace_offset, st_element_array);
2356 }
2357
2358 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2359 set_stacktrace(throwable, nullptr);
2360 }
2361
2362
2363 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2364 ResourceMark rm;
2365 Klass* k = throwable->klass();
2366 assert(k != nullptr, "just checking");
2367 st->print("%s", k->external_name());
2368 oop msg = message(throwable);
2369 if (msg != nullptr) {
2370 st->print(": %s", java_lang_String::as_utf8_string(msg));
2371 }
2372 }
2373
2374 // After this many redefines, the stack trace is unreliable.
2375 const int MAX_VERSION = USHRT_MAX;
2376
2377 static inline bool version_matches(Method* method, int version) {
2378 assert(version < MAX_VERSION, "version is too big");
2379 return method != nullptr && (method->constants()->version() == version);
2380 }
2381
2382 // This class provides a simple wrapper over the internal structure of
2383 // exception backtrace to insulate users of the backtrace from needing
2384 // to know what it looks like.
2385 // The code of this class is not GC safe. Allocations can only happen
2386 // in expand().
2387 class BacktraceBuilder: public StackObj {
2388 friend class BacktraceIterator;
2389 private:
2390 Handle _backtrace;
2391 objArrayOop _head;
2392 typeArrayOop _methods;
2393 typeArrayOop _bcis;
2394 objArrayOop _mirrors;
2395 typeArrayOop _names; // Needed to insulate method name against redefinition.
2396 // True if the top frame of the backtrace is omitted because it shall be hidden.
2397 bool _has_hidden_top_frame;
2398 int _index;
2399 NoSafepointVerifier _nsv;
2400
2401 enum {
2402 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2403 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2404 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2405 trace_names_offset = java_lang_Throwable::trace_names_offset,
2406 trace_conts_offset = java_lang_Throwable::trace_conts_offset,
2407 trace_next_offset = java_lang_Throwable::trace_next_offset,
2408 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2409 trace_size = java_lang_Throwable::trace_size,
2410 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2411 };
2412
2413 // get info out of chunks
2414 static typeArrayOop get_methods(objArrayHandle chunk) {
2415 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2416 assert(methods != nullptr, "method array should be initialized in backtrace");
2417 return methods;
2418 }
2419 static typeArrayOop get_bcis(objArrayHandle chunk) {
2420 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2421 assert(bcis != nullptr, "bci array should be initialized in backtrace");
2422 return bcis;
2423 }
2424 static objArrayOop get_mirrors(objArrayHandle chunk) {
2425 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2426 assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2427 return mirrors;
2428 }
2429 static typeArrayOop get_names(objArrayHandle chunk) {
2430 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2431 assert(names != nullptr, "names array should be initialized in backtrace");
2432 return names;
2433 }
2434 static bool has_hidden_top_frame(objArrayHandle chunk) {
2435 oop hidden = chunk->obj_at(trace_hidden_offset);
2436 return hidden != nullptr;
2437 }
2438
2439 public:
2440
2441 // constructor for new backtrace
2442 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2443 expand(CHECK);
2444 _backtrace = Handle(THREAD, _head);
2445 _index = 0;
2446 }
2447
2448 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2449 _methods = get_methods(backtrace);
2450 _bcis = get_bcis(backtrace);
2451 _mirrors = get_mirrors(backtrace);
2452 _names = get_names(backtrace);
2453 _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2454 assert(_methods->length() == _bcis->length() &&
2455 _methods->length() == _mirrors->length() &&
2456 _mirrors->length() == _names->length(),
2457 "method and source information arrays should match");
2458
2459 // head is the preallocated backtrace
2460 _head = backtrace();
2461 _backtrace = Handle(thread, _head);
2462 _index = 0;
2463 }
2464
2465 void expand(TRAPS) {
2466 objArrayHandle old_head(THREAD, _head);
2467 PauseNoSafepointVerifier pnsv(&_nsv);
2468
2469 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2470 objArrayHandle new_head(THREAD, head);
2471
2472 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2473 typeArrayHandle new_methods(THREAD, methods);
2474
2475 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2476 typeArrayHandle new_bcis(THREAD, bcis);
2477
2478 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2479 objArrayHandle new_mirrors(THREAD, mirrors);
2480
2481 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2482 typeArrayHandle new_names(THREAD, names);
2483
2484 if (!old_head.is_null()) {
2485 old_head->obj_at_put(trace_next_offset, new_head());
2486 }
2487 new_head->obj_at_put(trace_methods_offset, new_methods());
2488 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2489 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2490 new_head->obj_at_put(trace_names_offset, new_names());
2491 new_head->obj_at_put(trace_hidden_offset, nullptr);
2492
2493 _head = new_head();
2494 _methods = new_methods();
2495 _bcis = new_bcis();
2496 _mirrors = new_mirrors();
2497 _names = new_names();
2498 _index = 0;
2499 }
2500
2501 oop backtrace() {
2502 return _backtrace();
2503 }
2504
2505 inline void push(Method* method, int bci, TRAPS) {
2506 // Smear the -1 bci to 0 since the array only holds unsigned
2507 // shorts. The later line number lookup would just smear the -1
2508 // to a 0 even if it could be recorded.
2509 if (bci == SynchronizationEntryBCI) bci = 0;
2510
2511 if (_index >= trace_chunk_size) {
2512 methodHandle mhandle(THREAD, method);
2513 expand(CHECK);
2514 method = mhandle();
2515 }
2516
2517 _methods->ushort_at_put(_index, method->orig_method_idnum());
2518 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2519
2520 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2521 // klass owning the symbols alive so their refcounts aren't decremented.
2522 Symbol* name = method->name();
2523 _names->symbol_at_put(_index, name);
2524
2525 // We need to save the mirrors in the backtrace to keep the class
2526 // from being unloaded while we still have this stack trace.
2527 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2528 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2529
2530 _index++;
2531 }
2532
2533 void set_has_hidden_top_frame() {
2534 if (!_has_hidden_top_frame) {
2535 // It would be nice to add java/lang/Boolean::TRUE here
2536 // to indicate that this backtrace has a hidden top frame.
2537 // But this code is used before TRUE is allocated.
2538 // Therefore let's just use an arbitrary legal oop
2539 // available right here. _methods is a short[].
2540 assert(_methods != nullptr, "we need a legal oop");
2541 _has_hidden_top_frame = true;
2542 _head->obj_at_put(trace_hidden_offset, _methods);
2543 }
2544 }
2545 };
2546
2547 struct BacktraceElement : public StackObj {
2548 int _method_id;
2549 int _bci;
2550 int _version;
2551 Symbol* _name;
2552 Handle _mirror;
2553 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2554 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2555 };
2556
2557 class BacktraceIterator : public StackObj {
2558 int _index;
2559 objArrayHandle _result;
2560 objArrayHandle _mirrors;
2561 typeArrayHandle _methods;
2562 typeArrayHandle _bcis;
2563 typeArrayHandle _names;
2564
2565 void init(objArrayHandle result, Thread* thread) {
2566 // Get method id, bci, version and mirror from chunk
2567 _result = result;
2568 if (_result.not_null()) {
2569 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2570 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2571 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2572 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2573 _index = 0;
2574 }
2575 }
2576 public:
2577 BacktraceIterator(objArrayHandle result, Thread* thread) {
2578 init(result, thread);
2579 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2580 }
2581
2582 BacktraceElement next(Thread* thread) {
2583 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2584 _methods->ushort_at(_index),
2585 Backtrace::version_at(_bcis->int_at(_index)),
2586 Backtrace::bci_at(_bcis->int_at(_index)),
2587 _names->symbol_at(_index));
2588 _index++;
2589
2590 if (_index >= java_lang_Throwable::trace_chunk_size) {
2591 int next_offset = java_lang_Throwable::trace_next_offset;
2592 // Get next chunk
2593 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2594 init(result, thread);
2595 }
2596 return e;
2597 }
2598
2599 bool repeat() {
2600 return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2601 }
2602 };
2603
2604
2605 // Print stack trace element to the specified output stream.
2606 // The output is formatted into a stringStream and written to the outputStream in one step.
2607 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2608 int version, int bci, Symbol* name) {
2609 ResourceMark rm;
2610 stringStream ss;
2611
2612 InstanceKlass* holder = java_lang_Class::as_InstanceKlass(mirror());
2613 const char* klass_name = holder->external_name();
2614 char* method_name = name->as_C_string();
2615 ss.print("\tat %s.%s(", klass_name, method_name);
2616
2617 // Print module information
2618 ModuleEntry* module = holder->module();
2619 if (module->is_named()) {
2620 char* module_name = module->name()->as_C_string();
2621 if (module->version() != nullptr) {
2622 char* module_version = module->version()->as_C_string();
2623 ss.print("%s@%s/", module_name, module_version);
2624 } else {
2625 ss.print("%s/", module_name);
2626 }
2627 }
2628
2629 char* source_file_name = nullptr;
2630 Symbol* source = Backtrace::get_source_file_name(holder, version);
2631 if (source != nullptr) {
2632 source_file_name = source->as_C_string();
2633 }
2634
2635 // The method can be null if the requested class version is gone
2636 Method* method = holder->method_with_orig_idnum(method_id, version);
2637 if (!version_matches(method, version)) {
2638 ss.print("Redefined)");
2639 } else {
2640 int line_number = Backtrace::get_line_number(method, bci);
2641 if (line_number == -2) {
2642 ss.print("Native Method)");
2643 } else {
2644 if (source_file_name != nullptr && (line_number != -1)) {
2645 // Sourcename and linenumber
2646 ss.print("%s:%d)", source_file_name, line_number);
2647 } else if (source_file_name != nullptr) {
2648 // Just sourcename
2649 ss.print("%s)", source_file_name);
2650 } else {
2651 // Neither sourcename nor linenumber
2652 ss.print("Unknown Source)");
2653 }
2654 nmethod* nm = method->code();
2655 if (WizardMode && nm != nullptr) {
2656 ss.print("(nmethod " INTPTR_FORMAT ")", p2i(nm));
2657 }
2658 }
2659 }
2660
2661 ss.cr();
2662 st->print_raw(ss.freeze(), ss.size());
2663 }
2664
2665 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2666 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2667 int method_id = method->orig_method_idnum();
2668 int version = method->constants()->version();
2669 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2670 }
2671
2672 /**
2673 * Print the throwable message and its stack trace plus all causes by walking the
2674 * cause chain. The output looks the same as of Throwable.printStackTrace().
2675 */
2676 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2677 // First, print the message.
2678 print(throwable(), st);
2679 st->cr();
2680
2681 // Now print the stack trace.
2682 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2683 while (throwable.not_null()) {
2684 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2685 if (result.is_null()) {
2686 st->print_raw_cr("\t<<no stack trace available>>");
2687 return;
2688 }
2689 BacktraceIterator iter(result, THREAD);
2690
2691 while (iter.repeat()) {
2692 BacktraceElement bte = iter.next(THREAD);
2693 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2694 }
2695 if (THREAD->can_call_java()) {
2696 // Call getCause() which doesn't necessarily return the _cause field.
2697 ExceptionMark em(THREAD);
2698 JavaValue cause(T_OBJECT);
2699 JavaCalls::call_virtual(&cause,
2700 throwable,
2701 throwable->klass(),
2702 vmSymbols::getCause_name(),
2703 vmSymbols::void_throwable_signature(),
2704 THREAD);
2705 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2706 if (HAS_PENDING_EXCEPTION) {
2707 CLEAR_PENDING_EXCEPTION;
2708 throwable = Handle();
2709 } else {
2710 throwable = Handle(THREAD, cause.get_oop());
2711 if (throwable.not_null()) {
2712 st->print("Caused by: ");
2713 print(throwable(), st);
2714 st->cr();
2715 }
2716 }
2717 } else {
2718 st->print_raw_cr("<<cannot call Java to get cause>>");
2719 return;
2720 }
2721 }
2722 }
2723
2724 /**
2725 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2726 */
2727 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2728 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2729 JavaValue result(T_VOID);
2730 JavaCalls::call_virtual(&result,
2731 throwable,
2732 vmClasses::Throwable_klass(),
2733 vmSymbols::printStackTrace_name(),
2734 vmSymbols::void_method_signature(),
2735 THREAD);
2736 }
2737
2738 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2739 if (!StackTraceInThrowable) return;
2740 ResourceMark rm(THREAD);
2741
2742 // Start out by clearing the backtrace for this object, in case the VM
2743 // runs out of memory while allocating the stack trace
2744 set_backtrace(throwable(), nullptr);
2745 // Clear lazily constructed Java level stacktrace if refilling occurs
2746 // This is unnecessary in 1.7+ but harmless
2747 clear_stacktrace(throwable());
2748
2749 int max_depth = MaxJavaStackTraceDepth;
2750 JavaThread* thread = THREAD;
2751
2752 BacktraceBuilder bt(CHECK);
2753
2754 // If there is no Java frame just return the method that was being called
2755 // with bci 0
2756 if (!thread->has_last_Java_frame()) {
2757 if (max_depth >= 1 && method() != nullptr) {
2758 bt.push(method(), 0, CHECK);
2759 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2760 set_depth(throwable(), 1);
2761 set_backtrace(throwable(), bt.backtrace());
2762 }
2763 return;
2764 }
2765
2766 // Instead of using vframe directly, this version of fill_in_stack_trace
2767 // basically handles everything by hand. This significantly improved the
2768 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2769 // See bug 6333838 for more details.
2770 // The "ASSERT" here is to verify this method generates the exactly same stack
2771 // trace as utilizing vframe.
2772 #ifdef ASSERT
2773 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2774 #endif
2775 int total_count = 0;
2776 RegisterMap map(thread,
2777 RegisterMap::UpdateMap::skip,
2778 RegisterMap::ProcessFrames::skip,
2779 RegisterMap::WalkContinuation::include);
2780 int decode_offset = 0;
2781 nmethod* nm = nullptr;
2782 bool skip_fillInStackTrace_check = false;
2783 bool skip_throwableInit_check = false;
2784 bool skip_hidden = !ShowHiddenFrames;
2785 bool show_carrier = ShowCarrierFrames;
2786 ContinuationEntry* cont_entry = thread->last_continuation();
2787 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2788 Method* method = nullptr;
2789 int bci = 0;
2790
2791 // Compiled java method case.
2792 if (decode_offset != 0) {
2793 DebugInfoReadStream stream(nm, decode_offset);
2794 decode_offset = stream.read_int();
2795 method = (Method*)nm->metadata_at(stream.read_int());
2796 bci = stream.read_bci();
2797 } else {
2798 if (fr.is_first_frame()) break;
2799
2800 if (Continuation::is_continuation_enterSpecial(fr)) {
2801 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2802 if (!show_carrier && cont_entry->is_virtual_thread()) {
2803 break;
2804 }
2805 cont_entry = cont_entry->parent();
2806 }
2807
2808 address pc = fr.pc();
2809 if (fr.is_interpreted_frame()) {
2810 address bcp;
2811 if (!map.in_cont()) {
2812 bcp = fr.interpreter_frame_bcp();
2813 method = fr.interpreter_frame_method();
2814 } else {
2815 bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2816 method = map.stack_chunk()->interpreter_frame_method(fr);
2817 }
2818 bci = method->bci_from(bcp);
2819 fr = fr.sender(&map);
2820 } else {
2821 CodeBlob* cb = fr.cb();
2822 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2823 // but non nmethod
2824 fr = fr.sender(&map);
2825 if (cb == nullptr || !cb->is_nmethod()) {
2826 continue;
2827 }
2828 nm = cb->as_nmethod();
2829 assert(nm->method() != nullptr, "must be");
2830 if (nm->method()->is_native()) {
2831 method = nm->method();
2832 bci = 0;
2833 } else {
2834 PcDesc* pd = nm->pc_desc_at(pc);
2835 decode_offset = pd->scope_decode_offset();
2836 // if decode_offset is not equal to 0, it will execute the
2837 // "compiled java method case" at the beginning of the loop.
2838 continue;
2839 }
2840 }
2841 }
2842 #ifdef ASSERT
2843 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2844 assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2845 st.next();
2846 }
2847 #endif
2848
2849 // the format of the stacktrace will be:
2850 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2851 // - 0 or more <init> methods for the exception class (skipped)
2852 // - rest of the stack
2853
2854 if (!skip_fillInStackTrace_check) {
2855 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2856 throwable->is_a(method->method_holder())) {
2857 continue;
2858 }
2859 else {
2860 skip_fillInStackTrace_check = true; // gone past them all
2861 }
2862 }
2863 if (!skip_throwableInit_check) {
2864 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2865
2866 // skip <init> methods of the exception class and superclasses
2867 // This is similar to classic VM.
2868 if (method->name() == vmSymbols::object_initializer_name() &&
2869 throwable->is_a(method->method_holder())) {
2870 continue;
2871 } else {
2872 // there are none or we've seen them all - either way stop checking
2873 skip_throwableInit_check = true;
2874 }
2875 }
2876 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2877 if (skip_hidden) {
2878 if (total_count == 0) {
2879 // The top frame will be hidden from the stack trace.
2880 bt.set_has_hidden_top_frame();
2881 }
2882 continue;
2883 }
2884 }
2885
2886 bt.push(method, bci, CHECK);
2887 total_count++;
2888 }
2889
2890 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2891
2892 // Put completed stack trace into throwable object
2893 set_backtrace(throwable(), bt.backtrace());
2894 set_depth(throwable(), total_count);
2895 }
2896
2897 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2898 // No-op if stack trace is disabled
2899 if (!StackTraceInThrowable) {
2900 return;
2901 }
2902
2903 // Disable stack traces for some preallocated out of memory errors
2904 if (!Universe::should_fill_in_stack_trace(throwable)) {
2905 return;
2906 }
2907
2908 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2909 PreserveExceptionMark pm(THREAD);
2910
2911 fill_in_stack_trace(throwable, method, THREAD);
2912 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2913 // original exception via the PreserveExceptionMark destructor.
2914 CLEAR_PENDING_EXCEPTION;
2915 }
2916
2917 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2918 // Allocate stack trace - backtrace is created but not filled in
2919
2920 // No-op if stack trace is disabled
2921 if (!StackTraceInThrowable) return;
2922 BacktraceBuilder bt(CHECK); // creates a backtrace
2923 set_backtrace(throwable(), bt.backtrace());
2924 }
2925
2926
2927 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2928 // Fill in stack trace into preallocated backtrace (no GC)
2929
2930 // No-op if stack trace is disabled
2931 if (!StackTraceInThrowable) return;
2932
2933 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2934
2935 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2936
2937 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2938 assert(backtrace.not_null(), "backtrace should have been preallocated");
2939
2940 ResourceMark rm(THREAD);
2941 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2942
2943 BacktraceBuilder bt(THREAD, backtrace);
2944
2945 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2946 // methods as preallocated errors aren't created by "java" code.
2947
2948 // fill in as much stack trace as possible
2949 int chunk_count = 0;
2950 for (;!st.at_end(); st.next()) {
2951 bt.push(st.method(), st.bci(), CHECK);
2952 chunk_count++;
2953
2954 // Bail-out for deep stacks
2955 if (chunk_count >= trace_chunk_size) break;
2956 }
2957 set_depth(throwable(), chunk_count);
2958 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2959
2960 // We support the Throwable immutability protocol defined for Java 7.
2961 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2962 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2963 }
2964
2965 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2966 objArrayHandle stack_trace_array_h, TRAPS) {
2967
2968 if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2969 THROW(vmSymbols::java_lang_NullPointerException());
2970 }
2971
2972 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2973
2974 if (stack_trace_array_h->length() != depth) {
2975 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2976 }
2977
2978 objArrayHandle result(THREAD, objArrayOop(backtrace()));
2979 BacktraceIterator iter(result, THREAD);
2980
2981 int index = 0;
2982 while (iter.repeat()) {
2983 BacktraceElement bte = iter.next(THREAD);
2984
2985 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2986
2987 if (stack_trace_element.is_null()) {
2988 THROW(vmSymbols::java_lang_NullPointerException());
2989 }
2990
2991 InstanceKlass* holder = java_lang_Class::as_InstanceKlass(bte._mirror());
2992 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2993
2994 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2995 method,
2996 bte._version,
2997 bte._bci,
2998 bte._name,
2999 CHECK);
3000 }
3001 }
3002
3003 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
3004 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
3005 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
3006 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
3007 // symbolic stacktrace of 'throwable'.
3008 assert(throwable.not_null(), "shouldn't be");
3009
3010 // Now create the message from the original exception and thread name.
3011 ResourceMark rm(current);
3012 const char *message = nullptr;
3013 oop detailed_message = java_lang_Throwable::message(throwable());
3014 if (detailed_message != nullptr) {
3015 message = java_lang_String::as_utf8_string(detailed_message);
3016 }
3017 stringStream st;
3018 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
3019 message == nullptr ? "" : ":");
3020 if (message == nullptr) {
3021 st.print("[in thread \"%s\"]", current->name());
3022 } else {
3023 st.print("%s [in thread \"%s\"]", message, current->name());
3024 }
3025
3026 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
3027 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
3028 // If new_exception returns a different exception while creating the exception,
3029 // abandon the attempt to save the initialization error and return null.
3030 if (init_error->klass()->name() != exception_name) {
3031 log_info(class, init)("Exception %s thrown while saving initialization exception",
3032 init_error->klass()->external_name());
3033 return Handle();
3034 }
3035
3036 // Call to java to fill in the stack trace and clear declaringClassObject to
3037 // not keep classes alive in the stack trace.
3038 // call this: public StackTraceElement[] getStackTrace()
3039 JavaValue result(T_ARRAY);
3040 JavaCalls::call_virtual(&result, throwable,
3041 vmClasses::Throwable_klass(),
3042 vmSymbols::getStackTrace_name(),
3043 vmSymbols::getStackTrace_signature(),
3044 current);
3045 if (!current->has_pending_exception()){
3046 Handle stack_trace(current, result.get_oop());
3047 assert(stack_trace->is_objArray(), "Should be an array");
3048 java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
3049 // Clear backtrace because the stacktrace should be used instead.
3050 set_backtrace(init_error(), nullptr);
3051 } else {
3052 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
3053 init_error->klass()->external_name());
3054 current->clear_pending_exception();
3055 }
3056
3057 return init_error;
3058 }
3059
3060 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
3061 JavaThread* current = JavaThread::current();
3062 objArrayHandle result(current, objArrayOop(backtrace(throwable)));
3063 BacktraceIterator iter(result, current);
3064 // No backtrace available.
3065 if (!iter.repeat()) return false;
3066
3067 // If the exception happened in a frame that has been hidden, i.e.,
3068 // omitted from the back trace, we can not compute the message.
3069 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
3070 if (hidden != nullptr) {
3071 return false;
3072 }
3073
3074 // Get first backtrace element.
3075 BacktraceElement bte = iter.next(current);
3076
3077 InstanceKlass* holder = java_lang_Class::as_InstanceKlass(bte._mirror());
3078 assert(holder != nullptr, "first element should be non-null");
3079 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
3080
3081 // Original version is no longer available.
3082 if (m == nullptr || !version_matches(m, bte._version)) {
3083 return false;
3084 }
3085
3086 *method = m;
3087 *bci = bte._bci;
3088 return true;
3089 }
3090
3091 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
3092 // Allocate java.lang.StackTraceElement instance
3093 InstanceKlass* k = vmClasses::StackTraceElement_klass();
3094 assert(k != nullptr, "must be loaded in 1.4+");
3095 if (k->should_be_initialized()) {
3096 k->initialize(CHECK_NULL);
3097 }
3098
3099 Handle element = k->allocate_instance_handle(CHECK_NULL);
3100
3101 int version = method->constants()->version();
3102 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
3103 return element();
3104 }
3105
3106 void java_lang_StackTraceElement::fill_in(Handle element,
3107 InstanceKlass* holder, const methodHandle& method,
3108 int version, int bci, Symbol* name, TRAPS) {
3109 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
3110
3111 ResourceMark rm(THREAD);
3112 HandleMark hm(THREAD);
3113
3114 // Fill in class name
3115 Handle java_class(THREAD, holder->java_mirror());
3116 oop classname = java_lang_Class::name(java_class, CHECK);
3117 java_lang_StackTraceElement::set_declaringClass(element(), classname);
3118 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
3119
3120 oop loader = holder->class_loader();
3121 if (loader != nullptr) {
3122 oop loader_name = java_lang_ClassLoader::name(loader);
3123 if (loader_name != nullptr)
3124 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
3125 }
3126
3127 // Fill in method name
3128 oop methodname = StringTable::intern(name, CHECK);
3129 java_lang_StackTraceElement::set_methodName(element(), methodname);
3130
3131 // Fill in module name and version
3132 ModuleEntry* module = holder->module();
3133 if (module->is_named()) {
3134 oop module_name = StringTable::intern(module->name(), CHECK);
3135 java_lang_StackTraceElement::set_moduleName(element(), module_name);
3136 oop module_version;
3137 if (module->version() != nullptr) {
3138 module_version = StringTable::intern(module->version(), CHECK);
3139 } else {
3140 module_version = nullptr;
3141 }
3142 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
3143 }
3144
3145 if (method() == nullptr || !version_matches(method(), version)) {
3146 // The method was redefined, accurate line number information isn't available
3147 java_lang_StackTraceElement::set_fileName(element(), nullptr);
3148 java_lang_StackTraceElement::set_lineNumber(element(), -1);
3149 } else {
3150 Symbol* source;
3151 oop source_file;
3152 int line_number;
3153 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
3154
3155 java_lang_StackTraceElement::set_fileName(element(), source_file);
3156 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
3157 }
3158 }
3159
3160 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
3161 InstanceKlass* holder,
3162 int version,
3163 const methodHandle& method,
3164 int bci,
3165 Symbol*& source,
3166 oop& source_file,
3167 int& line_number, TRAPS) {
3168 // Fill in source file name and line number.
3169 source = Backtrace::get_source_file_name(holder, version);
3170 source_file = java_lang_Class::source_file(java_class());
3171 if (source != nullptr) {
3172 // Class was not redefined. We can trust its cache if set,
3173 // else we have to initialize it.
3174 if (source_file == nullptr) {
3175 source_file = StringTable::intern(source, CHECK);
3176 java_lang_Class::set_source_file(java_class(), source_file);
3177 }
3178 } else {
3179 // Class was redefined. Dump the cache if it was set.
3180 if (source_file != nullptr) {
3181 source_file = nullptr;
3182 java_lang_Class::set_source_file(java_class(), source_file);
3183 }
3184 }
3185 line_number = Backtrace::get_line_number(method(), bci);
3186 }
3187
3188 #if INCLUDE_JVMCI
3189 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
3190 Symbol*& filename, int& line_number, TRAPS) {
3191 ResourceMark rm(THREAD);
3192 HandleMark hm(THREAD);
3193
3194 filename = nullptr;
3195 line_number = -1;
3196
3197 oop source_file;
3198 int version = method->constants()->version();
3199 InstanceKlass* holder = method->method_holder();
3200 Handle java_class(THREAD, holder->java_mirror());
3201 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
3202 }
3203 #endif // INCLUDE_JVMCI
3204
3205 // java_lang_ClassFrameInfo
3206
3207 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
3208 int java_lang_ClassFrameInfo::_flags_offset;
3209
3210 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
3211 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \
3212 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false)
3213
3214 void java_lang_ClassFrameInfo::compute_offsets() {
3215 InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
3216 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3217 }
3218
3219 #if INCLUDE_CDS
3220 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
3221 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3222 }
3223 #endif
3224
3225 static int get_flags(const methodHandle& m) {
3226 int flags = m->access_flags().as_method_flags();
3227 if (m->is_object_initializer()) {
3228 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR;
3229 } else {
3230 // Note: Static initializers can be here. Record them as plain methods.
3231 flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
3232 }
3233 if (m->caller_sensitive()) {
3234 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
3235 }
3236 if (m->is_hidden()) {
3237 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3238 }
3239 assert((flags & 0xFF000000) == 0, "unexpected flags");
3240 return flags;
3241 }
3242
3243 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3244 return obj->obj_field(_classOrMemberName_offset);
3245 }
3246
3247 int java_lang_ClassFrameInfo::flags(oop obj) {
3248 return obj->int_field(_flags_offset);
3249 }
3250
3251 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3252 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3253 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3254 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3255 stackFrame->int_field_put(_flags_offset, flags);
3256 }
3257
3258 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3259 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3260 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3261 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3262 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3263 stackFrame->int_field_put(_flags_offset, flags);
3264 }
3265
3266
3267 // java_lang_StackFrameInfo
3268
3269 int java_lang_StackFrameInfo::_type_offset;
3270 int java_lang_StackFrameInfo::_name_offset;
3271 int java_lang_StackFrameInfo::_bci_offset;
3272 int java_lang_StackFrameInfo::_version_offset;
3273 int java_lang_StackFrameInfo::_contScope_offset;
3274
3275 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3276 macro(_type_offset, k, "type", object_signature, false); \
3277 macro(_name_offset, k, "name", string_signature, false); \
3278 macro(_bci_offset, k, "bci", int_signature, false); \
3279 macro(_contScope_offset, k, "contScope", continuationscope_signature, false)
3280
3281 void java_lang_StackFrameInfo::compute_offsets() {
3282 InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3283 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3284 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3285 }
3286
3287 #if INCLUDE_CDS
3288 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3289 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3290 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3291 }
3292 #endif
3293
3294 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3295 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3296 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3297 return method;
3298 }
3299
3300 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3301 // set Method* or mid/cpref
3302 HandleMark hm(THREAD);
3303 Handle cont_h(THREAD, cont);
3304 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3305
3306 // set bci
3307 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3308 // method may be redefined; store the version
3309 int version = method->constants()->version();
3310 assert((jushort)version == version, "version should be short");
3311 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3312
3313 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3314 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3315 }
3316
3317 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3318 ResourceMark rm(THREAD);
3319 HandleMark hm(THREAD);
3320
3321 Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3322 InstanceKlass* holder = method->method_holder();
3323 short version = stackFrame->short_field(_version_offset);
3324 int bci = stackFrame->int_field(_bci_offset);
3325 Symbol* name = method->name();
3326 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3327 }
3328
3329 oop java_lang_StackFrameInfo::type(oop obj) {
3330 return obj->obj_field(_type_offset);
3331 }
3332
3333 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3334 obj->obj_field_put(_type_offset, value);
3335 }
3336
3337 oop java_lang_StackFrameInfo::name(oop obj) {
3338 return obj->obj_field(_name_offset);
3339 }
3340
3341 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3342 obj->obj_field_put(_name_offset, value);
3343 }
3344
3345 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3346 obj->short_field_put(_version_offset, value);
3347 }
3348
3349 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3350 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3351 obj->int_field_put(_bci_offset, value);
3352 }
3353
3354 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3355 obj->obj_field_put(_contScope_offset, value);
3356 }
3357
3358 int java_lang_LiveStackFrameInfo::_monitors_offset;
3359 int java_lang_LiveStackFrameInfo::_locals_offset;
3360 int java_lang_LiveStackFrameInfo::_operands_offset;
3361 int java_lang_LiveStackFrameInfo::_mode_offset;
3362
3363 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3364 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
3365 macro(_locals_offset, k, "locals", object_array_signature, false); \
3366 macro(_operands_offset, k, "operands", object_array_signature, false); \
3367 macro(_mode_offset, k, "mode", int_signature, false)
3368
3369 void java_lang_LiveStackFrameInfo::compute_offsets() {
3370 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3371 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3372 }
3373
3374 #if INCLUDE_CDS
3375 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3376 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3377 }
3378 #endif
3379
3380 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3381 obj->obj_field_put(_monitors_offset, value);
3382 }
3383
3384 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3385 obj->obj_field_put(_locals_offset, value);
3386 }
3387
3388 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3389 obj->obj_field_put(_operands_offset, value);
3390 }
3391
3392 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3393 obj->int_field_put(_mode_offset, value);
3394 }
3395
3396
3397 // java_lang_AccessibleObject
3398
3399 int java_lang_reflect_AccessibleObject::_override_offset;
3400
3401 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3402 macro(_override_offset, k, "override", bool_signature, false)
3403
3404 void java_lang_reflect_AccessibleObject::compute_offsets() {
3405 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3406 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3407 }
3408
3409 #if INCLUDE_CDS
3410 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3411 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3412 }
3413 #endif
3414
3415 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3416 return (jboolean) reflect->bool_field(_override_offset);
3417 }
3418
3419 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3420 reflect->bool_field_put(_override_offset, (int) value);
3421 }
3422
3423 // java_lang_reflect_Method
3424
3425 int java_lang_reflect_Method::_clazz_offset;
3426 int java_lang_reflect_Method::_name_offset;
3427 int java_lang_reflect_Method::_returnType_offset;
3428 int java_lang_reflect_Method::_parameterTypes_offset;
3429 int java_lang_reflect_Method::_exceptionTypes_offset;
3430 int java_lang_reflect_Method::_slot_offset;
3431 int java_lang_reflect_Method::_modifiers_offset;
3432 int java_lang_reflect_Method::_signature_offset;
3433 int java_lang_reflect_Method::_annotations_offset;
3434 int java_lang_reflect_Method::_parameter_annotations_offset;
3435 int java_lang_reflect_Method::_annotation_default_offset;
3436
3437 #define METHOD_FIELDS_DO(macro) \
3438 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3439 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3440 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
3441 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3442 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3443 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3444 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3445 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3446 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3447 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3448 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
3449
3450 void java_lang_reflect_Method::compute_offsets() {
3451 InstanceKlass* k = vmClasses::reflect_Method_klass();
3452 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3453 }
3454
3455 #if INCLUDE_CDS
3456 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3457 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3458 }
3459 #endif
3460
3461 Handle java_lang_reflect_Method::create(TRAPS) {
3462 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3463 InstanceKlass* klass = vmClasses::reflect_Method_klass();
3464 // This class is eagerly initialized during VM initialization, since we keep a reference
3465 // to one of the methods
3466 assert(klass->is_initialized(), "must be initialized");
3467 return klass->allocate_instance_handle(THREAD);
3468 }
3469
3470 oop java_lang_reflect_Method::clazz(oop reflect) {
3471 return reflect->obj_field(_clazz_offset);
3472 }
3473
3474 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3475 reflect->obj_field_put(_clazz_offset, value);
3476 }
3477
3478 int java_lang_reflect_Method::slot(oop reflect) {
3479 return reflect->int_field(_slot_offset);
3480 }
3481
3482 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3483 reflect->int_field_put(_slot_offset, value);
3484 }
3485
3486 void java_lang_reflect_Method::set_name(oop method, oop value) {
3487 method->obj_field_put(_name_offset, value);
3488 }
3489
3490 oop java_lang_reflect_Method::return_type(oop method) {
3491 return method->obj_field(_returnType_offset);
3492 }
3493
3494 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3495 method->obj_field_put(_returnType_offset, value);
3496 }
3497
3498 oop java_lang_reflect_Method::parameter_types(oop method) {
3499 return method->obj_field(_parameterTypes_offset);
3500 }
3501
3502 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3503 method->obj_field_put(_parameterTypes_offset, value);
3504 }
3505
3506 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3507 method->obj_field_put(_exceptionTypes_offset, value);
3508 }
3509
3510 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3511 method->int_field_put(_modifiers_offset, value);
3512 }
3513
3514 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3515 method->obj_field_put(_signature_offset, value);
3516 }
3517
3518 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3519 method->obj_field_put(_annotations_offset, value);
3520 }
3521
3522 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3523 method->obj_field_put(_parameter_annotations_offset, value);
3524 }
3525
3526 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3527 method->obj_field_put(_annotation_default_offset, value);
3528 }
3529
3530 int java_lang_reflect_Constructor::_clazz_offset;
3531 int java_lang_reflect_Constructor::_parameterTypes_offset;
3532 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3533 int java_lang_reflect_Constructor::_slot_offset;
3534 int java_lang_reflect_Constructor::_modifiers_offset;
3535 int java_lang_reflect_Constructor::_signature_offset;
3536 int java_lang_reflect_Constructor::_annotations_offset;
3537 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3538
3539 #define CONSTRUCTOR_FIELDS_DO(macro) \
3540 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3541 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3542 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3543 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3544 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3545 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3546 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3547 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3548
3549 void java_lang_reflect_Constructor::compute_offsets() {
3550 InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3551 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3552 }
3553
3554 #if INCLUDE_CDS
3555 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3556 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3557 }
3558 #endif
3559
3560 Handle java_lang_reflect_Constructor::create(TRAPS) {
3561 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3562 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3563 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3564 InstanceKlass* ik = InstanceKlass::cast(k);
3565 // Ensure it is initialized
3566 ik->initialize(CHECK_NH);
3567 return ik->allocate_instance_handle(THREAD);
3568 }
3569
3570 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3571 return reflect->obj_field(_clazz_offset);
3572 }
3573
3574 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3575 reflect->obj_field_put(_clazz_offset, value);
3576 }
3577
3578 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3579 return constructor->obj_field(_parameterTypes_offset);
3580 }
3581
3582 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3583 constructor->obj_field_put(_parameterTypes_offset, value);
3584 }
3585
3586 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3587 constructor->obj_field_put(_exceptionTypes_offset, value);
3588 }
3589
3590 int java_lang_reflect_Constructor::slot(oop reflect) {
3591 return reflect->int_field(_slot_offset);
3592 }
3593
3594 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3595 reflect->int_field_put(_slot_offset, value);
3596 }
3597
3598 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3599 constructor->int_field_put(_modifiers_offset, value);
3600 }
3601
3602 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3603 constructor->obj_field_put(_signature_offset, value);
3604 }
3605
3606 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3607 constructor->obj_field_put(_annotations_offset, value);
3608 }
3609
3610 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3611 method->obj_field_put(_parameter_annotations_offset, value);
3612 }
3613
3614 int java_lang_reflect_Field::_clazz_offset;
3615 int java_lang_reflect_Field::_name_offset;
3616 int java_lang_reflect_Field::_type_offset;
3617 int java_lang_reflect_Field::_slot_offset;
3618 int java_lang_reflect_Field::_modifiers_offset;
3619 int java_lang_reflect_Field::_trusted_final_offset;
3620 int java_lang_reflect_Field::_signature_offset;
3621 int java_lang_reflect_Field::_annotations_offset;
3622
3623 #define FIELD_FIELDS_DO(macro) \
3624 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3625 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3626 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \
3627 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3628 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3629 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \
3630 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3631 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3632
3633 void java_lang_reflect_Field::compute_offsets() {
3634 InstanceKlass* k = vmClasses::reflect_Field_klass();
3635 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3636 }
3637
3638 #if INCLUDE_CDS
3639 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3640 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3641 }
3642 #endif
3643
3644 Handle java_lang_reflect_Field::create(TRAPS) {
3645 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3646 Symbol* name = vmSymbols::java_lang_reflect_Field();
3647 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3648 InstanceKlass* ik = InstanceKlass::cast(k);
3649 // Ensure it is initialized
3650 ik->initialize(CHECK_NH);
3651 return ik->allocate_instance_handle(THREAD);
3652 }
3653
3654 oop java_lang_reflect_Field::clazz(oop reflect) {
3655 return reflect->obj_field(_clazz_offset);
3656 }
3657
3658 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3659 reflect->obj_field_put(_clazz_offset, value);
3660 }
3661
3662 oop java_lang_reflect_Field::name(oop field) {
3663 return field->obj_field(_name_offset);
3664 }
3665
3666 void java_lang_reflect_Field::set_name(oop field, oop value) {
3667 field->obj_field_put(_name_offset, value);
3668 }
3669
3670 oop java_lang_reflect_Field::type(oop field) {
3671 return field->obj_field(_type_offset);
3672 }
3673
3674 void java_lang_reflect_Field::set_type(oop field, oop value) {
3675 field->obj_field_put(_type_offset, value);
3676 }
3677
3678 int java_lang_reflect_Field::slot(oop reflect) {
3679 return reflect->int_field(_slot_offset);
3680 }
3681
3682 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3683 reflect->int_field_put(_slot_offset, value);
3684 }
3685
3686 int java_lang_reflect_Field::modifiers(oop field) {
3687 return field->int_field(_modifiers_offset);
3688 }
3689
3690 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3691 field->int_field_put(_modifiers_offset, value);
3692 }
3693
3694 void java_lang_reflect_Field::set_trusted_final(oop field) {
3695 field->bool_field_put(_trusted_final_offset, true);
3696 }
3697
3698 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3699 field->obj_field_put(_signature_offset, value);
3700 }
3701
3702 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3703 field->obj_field_put(_annotations_offset, value);
3704 }
3705
3706 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3707 // Allocate java.lang.reflect.RecordComponent instance
3708 HandleMark hm(THREAD);
3709 InstanceKlass* ik = vmClasses::RecordComponent_klass();
3710 assert(ik != nullptr, "must be loaded");
3711 ik->initialize(CHECK_NULL);
3712
3713 Handle element = ik->allocate_instance_handle(CHECK_NULL);
3714
3715 Handle decl_class(THREAD, holder->java_mirror());
3716 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3717
3718 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3719 oop component_name = StringTable::intern(name, CHECK_NULL);
3720 java_lang_reflect_RecordComponent::set_name(element(), component_name);
3721
3722 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3723 Handle component_type_h =
3724 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3725 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3726
3727 Method* accessor_method = nullptr;
3728 {
3729 // Prepend "()" to type to create the full method signature.
3730 ResourceMark rm(THREAD);
3731 int sig_len = type->utf8_length() + 3; // "()" and null char
3732 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3733 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3734 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3735 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3736 }
3737
3738 if (accessor_method != nullptr) {
3739 methodHandle method(THREAD, accessor_method);
3740 oop m = Reflection::new_method(method, false, CHECK_NULL);
3741 java_lang_reflect_RecordComponent::set_accessor(element(), m);
3742 } else {
3743 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3744 }
3745
3746 int sig_index = component->generic_signature_index();
3747 if (sig_index > 0) {
3748 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3749 oop component_sig = StringTable::intern(sig, CHECK_NULL);
3750 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3751 } else {
3752 java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3753 }
3754
3755 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3756 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3757
3758 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3759 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3760
3761 return element();
3762 }
3763
3764 int reflect_ConstantPool::_vmholder_offset;
3765
3766 void reflect_ConstantPool::compute_offsets() {
3767 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3768 // The field is injected and called Object vmholder in the jdk.internal.reflect.ConstantPool class.
3769 CONSTANTPOOL_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3770 }
3771
3772 #if INCLUDE_CDS
3773 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3774 CONSTANTPOOL_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3775 }
3776 #endif
3777
3778 int java_lang_reflect_Parameter::_name_offset;
3779 int java_lang_reflect_Parameter::_modifiers_offset;
3780 int java_lang_reflect_Parameter::_index_offset;
3781 int java_lang_reflect_Parameter::_executable_offset;
3782
3783 #define PARAMETER_FIELDS_DO(macro) \
3784 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3785 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3786 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \
3787 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3788
3789 void java_lang_reflect_Parameter::compute_offsets() {
3790 InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3791 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3792 }
3793
3794 #if INCLUDE_CDS
3795 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3796 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3797 }
3798 #endif
3799
3800 Handle java_lang_reflect_Parameter::create(TRAPS) {
3801 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3802 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3803 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3804 InstanceKlass* ik = InstanceKlass::cast(k);
3805 // Ensure it is initialized
3806 ik->initialize(CHECK_NH);
3807 return ik->allocate_instance_handle(THREAD);
3808 }
3809
3810 oop java_lang_reflect_Parameter::name(oop param) {
3811 return param->obj_field(_name_offset);
3812 }
3813
3814 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3815 param->obj_field_put(_name_offset, value);
3816 }
3817
3818 int java_lang_reflect_Parameter::modifiers(oop param) {
3819 return param->int_field(_modifiers_offset);
3820 }
3821
3822 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3823 param->int_field_put(_modifiers_offset, value);
3824 }
3825
3826 int java_lang_reflect_Parameter::index(oop param) {
3827 return param->int_field(_index_offset);
3828 }
3829
3830 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3831 param->int_field_put(_index_offset, value);
3832 }
3833
3834 oop java_lang_reflect_Parameter::executable(oop param) {
3835 return param->obj_field(_executable_offset);
3836 }
3837
3838 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3839 param->obj_field_put(_executable_offset, value);
3840 }
3841
3842 // java_lang_Module
3843
3844 int java_lang_Module::_loader_offset;
3845 int java_lang_Module::_name_offset;
3846 int java_lang_Module::_module_entry_offset;
3847
3848 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3849 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3850 return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3851 vmSymbols::java_lang_module_init_signature(),
3852 loader, module_name, CHECK_NH);
3853 }
3854
3855 #define MODULE_FIELDS_DO(macro) \
3856 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3857 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false)
3858
3859 void java_lang_Module::compute_offsets() {
3860 InstanceKlass* k = vmClasses::Module_klass();
3861 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3862 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3863 }
3864
3865 #if INCLUDE_CDS
3866 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3867 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3868 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3869 }
3870 #endif
3871
3872 oop java_lang_Module::loader(oop module) {
3873 return module->obj_field(_loader_offset);
3874 }
3875
3876 void java_lang_Module::set_loader(oop module, oop value) {
3877 module->obj_field_put(_loader_offset, value);
3878 }
3879
3880 oop java_lang_Module::name(oop module) {
3881 return module->obj_field(_name_offset);
3882 }
3883
3884 void java_lang_Module::set_name(oop module, oop value) {
3885 module->obj_field_put(_name_offset, value);
3886 }
3887
3888 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3889 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3890 assert(module != nullptr, "module can't be null");
3891 assert(oopDesc::is_oop(module), "module must be oop");
3892
3893 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3894 return module_entry;
3895 }
3896
3897 ModuleEntry* java_lang_Module::module_entry(oop module) {
3898 ModuleEntry* module_entry = module_entry_raw(module);
3899 if (module_entry == nullptr) {
3900 // If the inject field containing the ModuleEntry* is null then return the
3901 // class loader's unnamed module.
3902 oop loader = java_lang_Module::loader(module);
3903 Handle h_loader = Handle(Thread::current(), loader);
3904 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3905 return loader_cld->unnamed_module();
3906 }
3907 return module_entry;
3908 }
3909
3910 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3911 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3912 assert(module != nullptr, "module can't be null");
3913 assert(oopDesc::is_oop(module), "module must be oop");
3914 module->address_field_put(_module_entry_offset, (address)module_entry);
3915 }
3916
3917 Handle reflect_ConstantPool::create(TRAPS) {
3918 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3919 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3920 // Ensure it is initialized
3921 k->initialize(CHECK_NH);
3922 return k->allocate_instance_handle(THREAD);
3923 }
3924
3925
3926 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3927 assert(_vmholder_offset != 0, "Uninitialized vmholder");
3928 oop mirror = value->pool_holder()->java_mirror();
3929 // Save the mirror to get back the constant pool.
3930 reflect->obj_field_put(_vmholder_offset, mirror);
3931 }
3932
3933 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3934 assert(_vmholder_offset != 0, "Uninitialized vmholder");
3935 oop mirror = reflect->obj_field(_vmholder_offset);
3936 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(mirror);
3937
3938 // Get the constant pool back from the klass. Since class redefinition
3939 // merges the new constant pool into the old, this is essentially the
3940 // same constant pool as the original. If constant pool merging is
3941 // no longer done in the future, this will have to change to save
3942 // the original.
3943 return ik->constants();
3944 }
3945
3946
3947 // Support for java_lang_ref_Reference
3948
3949 bool java_lang_ref_Reference::_offsets_initialized;
3950
3951 int java_lang_ref_Reference::_referent_offset;
3952 int java_lang_ref_Reference::_queue_offset;
3953 int java_lang_ref_Reference::_next_offset;
3954 int java_lang_ref_Reference::_discovered_offset;
3955
3956 #define REFERENCE_FIELDS_DO(macro) \
3957 macro(_referent_offset, k, "referent", object_signature, false); \
3958 macro(_queue_offset, k, "queue", referencequeue_signature, false); \
3959 macro(_next_offset, k, "next", reference_signature, false); \
3960 macro(_discovered_offset, k, "discovered", reference_signature, false);
3961
3962 void java_lang_ref_Reference::compute_offsets() {
3963 if (_offsets_initialized) {
3964 return;
3965 }
3966 _offsets_initialized = true;
3967 InstanceKlass* k = vmClasses::Reference_klass();
3968 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3969 }
3970
3971 #if INCLUDE_CDS
3972 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3973 f->do_bool(&_offsets_initialized);
3974 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3975 }
3976 #endif
3977
3978 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3979 assert(obj != nullptr, "sanity");
3980 if (offset != _referent_offset) {
3981 return false;
3982 }
3983
3984 Klass* k = obj->klass();
3985 if (!k->is_instance_klass()) {
3986 return false;
3987 }
3988
3989 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3990 bool is_reference = ik->reference_type() != REF_NONE;
3991 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
3992 return is_reference;
3993 }
3994
3995 int java_lang_boxing_object::_value_offset;
3996 int java_lang_boxing_object::_long_value_offset;
3997
3998 #define BOXING_FIELDS_DO(macro) \
3999 macro(_value_offset, integerKlass, "value", int_signature, false); \
4000 macro(_long_value_offset, longKlass, "value", long_signature, false);
4001
4002 void java_lang_boxing_object::compute_offsets() {
4003 InstanceKlass* integerKlass = vmClasses::Integer_klass();
4004 InstanceKlass* longKlass = vmClasses::Long_klass();
4005 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4006 }
4007
4008 #if INCLUDE_CDS
4009 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
4010 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4011 }
4012 #endif
4013
4014 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
4015 Klass* k = vmClasses::box_klass(type);
4016 if (k == nullptr) return nullptr;
4017 InstanceKlass* ik = InstanceKlass::cast(k);
4018 if (!ik->is_initialized()) {
4019 ik->initialize(CHECK_NULL);
4020 }
4021 return ik->allocate_instance(THREAD);
4022 }
4023
4024
4025 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
4026 oop box = initialize_and_allocate(type, CHECK_NULL);
4027 if (box == nullptr) return nullptr;
4028 switch (type) {
4029 case T_BOOLEAN:
4030 box->bool_field_put(_value_offset, value->z);
4031 break;
4032 case T_CHAR:
4033 box->char_field_put(_value_offset, value->c);
4034 break;
4035 case T_FLOAT:
4036 box->float_field_put(_value_offset, value->f);
4037 break;
4038 case T_DOUBLE:
4039 box->double_field_put(_long_value_offset, value->d);
4040 break;
4041 case T_BYTE:
4042 box->byte_field_put(_value_offset, value->b);
4043 break;
4044 case T_SHORT:
4045 box->short_field_put(_value_offset, value->s);
4046 break;
4047 case T_INT:
4048 box->int_field_put(_value_offset, value->i);
4049 break;
4050 case T_LONG:
4051 box->long_field_put(_long_value_offset, value->j);
4052 break;
4053 default:
4054 return nullptr;
4055 }
4056 return box;
4057 }
4058
4059
4060 BasicType java_lang_boxing_object::basic_type(oop box) {
4061 if (box == nullptr) return T_ILLEGAL;
4062 BasicType type = vmClasses::box_klass_type(box->klass());
4063 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
4064 return T_ILLEGAL;
4065 return type;
4066 }
4067
4068
4069 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
4070 BasicType type = vmClasses::box_klass_type(box->klass());
4071 switch (type) {
4072 case T_BOOLEAN:
4073 value->z = box->bool_field(_value_offset);
4074 break;
4075 case T_CHAR:
4076 value->c = box->char_field(_value_offset);
4077 break;
4078 case T_FLOAT:
4079 value->f = box->float_field(_value_offset);
4080 break;
4081 case T_DOUBLE:
4082 value->d = box->double_field(_long_value_offset);
4083 break;
4084 case T_BYTE:
4085 value->b = box->byte_field(_value_offset);
4086 break;
4087 case T_SHORT:
4088 value->s = box->short_field(_value_offset);
4089 break;
4090 case T_INT:
4091 value->i = box->int_field(_value_offset);
4092 break;
4093 case T_LONG:
4094 value->j = box->long_field(_long_value_offset);
4095 break;
4096 default:
4097 return T_ILLEGAL;
4098 } // end switch
4099 return type;
4100 }
4101
4102
4103 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
4104 BasicType type = vmClasses::box_klass_type(box->klass());
4105 switch (type) {
4106 case T_BOOLEAN:
4107 box->bool_field_put(_value_offset, value->z);
4108 break;
4109 case T_CHAR:
4110 box->char_field_put(_value_offset, value->c);
4111 break;
4112 case T_FLOAT:
4113 box->float_field_put(_value_offset, value->f);
4114 break;
4115 case T_DOUBLE:
4116 box->double_field_put(_long_value_offset, value->d);
4117 break;
4118 case T_BYTE:
4119 box->byte_field_put(_value_offset, value->b);
4120 break;
4121 case T_SHORT:
4122 box->short_field_put(_value_offset, value->s);
4123 break;
4124 case T_INT:
4125 box->int_field_put(_value_offset, value->i);
4126 break;
4127 case T_LONG:
4128 box->long_field_put(_long_value_offset, value->j);
4129 break;
4130 default:
4131 return T_ILLEGAL;
4132 } // end switch
4133 return type;
4134 }
4135
4136
4137 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
4138 switch (type) {
4139 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
4140 case T_CHAR: st->print("%d", value->c); break;
4141 case T_BYTE: st->print("%d", value->b); break;
4142 case T_SHORT: st->print("%d", value->s); break;
4143 case T_INT: st->print("%d", value->i); break;
4144 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
4145 case T_FLOAT: st->print("%f", value->f); break;
4146 case T_DOUBLE: st->print("%lf", value->d); break;
4147 default: st->print("type %d?", type); break;
4148 }
4149 }
4150
4151
4152 // Support for java_lang_ref_SoftReference
4153 //
4154
4155 int java_lang_ref_SoftReference::_timestamp_offset;
4156 int java_lang_ref_SoftReference::_static_clock_offset;
4157
4158 #define SOFTREFERENCE_FIELDS_DO(macro) \
4159 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
4160 macro(_static_clock_offset, k, "clock", long_signature, true)
4161
4162 void java_lang_ref_SoftReference::compute_offsets() {
4163 InstanceKlass* k = vmClasses::SoftReference_klass();
4164 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4165 }
4166
4167 #if INCLUDE_CDS
4168 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
4169 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4170 }
4171 #endif
4172
4173 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
4174 return ref->long_field(_timestamp_offset);
4175 }
4176
4177 jlong java_lang_ref_SoftReference::clock() {
4178 InstanceKlass* ik = vmClasses::SoftReference_klass();
4179 oop base = ik->static_field_base_raw();
4180 return base->long_field(_static_clock_offset);
4181 }
4182
4183 void java_lang_ref_SoftReference::set_clock(jlong value) {
4184 InstanceKlass* ik = vmClasses::SoftReference_klass();
4185 oop base = ik->static_field_base_raw();
4186 base->long_field_put(_static_clock_offset, value);
4187 }
4188
4189 // Support for java_lang_invoke_DirectMethodHandle
4190
4191 int java_lang_invoke_DirectMethodHandle::_member_offset;
4192
4193 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
4194 oop member_name = nullptr;
4195 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
4196 "a DirectMethodHandle oop is expected");
4197 return dmh->obj_field(_member_offset);
4198 }
4199
4200 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
4201 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
4202
4203 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
4204 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
4205 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4206 }
4207
4208 #if INCLUDE_CDS
4209 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
4210 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4211 }
4212 #endif
4213
4214 // Support for java_lang_invoke_MethodHandle
4215
4216 int java_lang_invoke_MethodHandle::_type_offset;
4217 int java_lang_invoke_MethodHandle::_form_offset;
4218
4219 int java_lang_invoke_MemberName::_clazz_offset;
4220 int java_lang_invoke_MemberName::_name_offset;
4221 int java_lang_invoke_MemberName::_type_offset;
4222 int java_lang_invoke_MemberName::_flags_offset;
4223 int java_lang_invoke_MemberName::_method_offset;
4224 int java_lang_invoke_MemberName::_vmindex_offset;
4225
4226 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
4227 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
4228
4229 int java_lang_invoke_LambdaForm::_vmentry_offset;
4230
4231 #define METHODHANDLE_FIELDS_DO(macro) \
4232 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4233 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
4234
4235 void java_lang_invoke_MethodHandle::compute_offsets() {
4236 InstanceKlass* k = vmClasses::MethodHandle_klass();
4237 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4238 }
4239
4240 #if INCLUDE_CDS
4241 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4242 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4243 }
4244 #endif
4245
4246 #define MEMBERNAME_FIELDS_DO(macro) \
4247 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4248 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4249 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
4250 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
4251 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
4252
4253 void java_lang_invoke_MemberName::compute_offsets() {
4254 InstanceKlass* k = vmClasses::MemberName_klass();
4255 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4256 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4257 }
4258
4259 #if INCLUDE_CDS
4260 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4261 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4262 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4263 }
4264 #endif
4265
4266 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4267 macro(_vmholder_offset, k, "vmholder", class_signature, false)
4268
4269 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4270 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4271 assert(k != nullptr, "jdk mismatch");
4272 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4273 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4274 }
4275
4276 #if INCLUDE_CDS
4277 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4278 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4279 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4280 }
4281 #endif
4282
4283 #define LAMBDAFORM_FIELDS_DO(macro) \
4284 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4285
4286 void java_lang_invoke_LambdaForm::compute_offsets() {
4287 InstanceKlass* k = vmClasses::LambdaForm_klass();
4288 assert (k != nullptr, "jdk mismatch");
4289 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4290 }
4291
4292 #if INCLUDE_CDS
4293 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4294 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4295 }
4296 #endif
4297
4298 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4299 return obj != nullptr && is_subclass(obj->klass());
4300 }
4301
4302 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4303 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4304
4305 #define NEP_FIELDS_DO(macro) \
4306 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
4307 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4308
4309 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4310 return obj != nullptr && is_subclass(obj->klass());
4311 }
4312
4313 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4314 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4315 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4316 }
4317
4318 #if INCLUDE_CDS
4319 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4320 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4321 }
4322 #endif
4323
4324 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4325 return entry->obj_field(_method_type_offset);
4326 }
4327
4328 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4329 return entry->long_field(_downcall_stub_address_offset);
4330 }
4331
4332 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4333 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4334 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4335 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4336 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4337 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4338 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4339
4340 #define ABIDescriptor_FIELDS_DO(macro) \
4341 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4342 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4343 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4344 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4345 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4346 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4347 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4348
4349 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4350 return obj != nullptr && is_subclass(obj->klass());
4351 }
4352
4353 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4354 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4355 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4356 }
4357
4358 #if INCLUDE_CDS
4359 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4360 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4361 }
4362 #endif
4363
4364 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4365 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4366 }
4367
4368 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4369 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4370 }
4371
4372 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4373 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4374 }
4375
4376 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4377 return entry->int_field(_stackAlignment_offset);
4378 }
4379
4380 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4381 return entry->int_field(_shadowSpace_offset);
4382 }
4383
4384 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4385 return entry->obj_field(_scratch1_offset);
4386 }
4387
4388 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4389 return entry->obj_field(_scratch2_offset);
4390 }
4391
4392 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4393 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4394 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4395 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4396
4397 #define VMStorage_FIELDS_DO(macro) \
4398 macro(_type_offset, k, "type", byte_signature, false); \
4399 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4400 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4401 macro(_debugName_offset, k, "debugName", string_signature, false); \
4402
4403 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4404 return obj != nullptr && is_subclass(obj->klass());
4405 }
4406
4407 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4408 InstanceKlass* k = vmClasses::VMStorage_klass();
4409 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4410 }
4411
4412 #if INCLUDE_CDS
4413 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4414 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4415 }
4416 #endif
4417
4418 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4419 return entry->byte_field(_type_offset);
4420 }
4421
4422 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4423 return entry->int_field(_indexOrOffset_offset);
4424 }
4425
4426 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4427 return entry->short_field(_segmentMaskOrSize_offset);
4428 }
4429
4430 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4431 return entry->obj_field(_debugName_offset);
4432 }
4433
4434 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4435 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4436
4437 #define CallConv_FIELDS_DO(macro) \
4438 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4439 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4440
4441 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4442 return obj != nullptr && is_subclass(obj->klass());
4443 }
4444
4445 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4446 InstanceKlass* k = vmClasses::CallConv_klass();
4447 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4448 }
4449
4450 #if INCLUDE_CDS
4451 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4452 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4453 }
4454 #endif
4455
4456 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4457 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4458 }
4459
4460 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4461 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4462 }
4463
4464 oop java_lang_invoke_MethodHandle::type(oop mh) {
4465 return mh->obj_field(_type_offset);
4466 }
4467
4468 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4469 mh->obj_field_put(_type_offset, mtype);
4470 }
4471
4472 oop java_lang_invoke_MethodHandle::form(oop mh) {
4473 assert(_form_offset != 0, "");
4474 return mh->obj_field(_form_offset);
4475 }
4476
4477 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4478 assert(_form_offset != 0, "");
4479 mh->obj_field_put(_form_offset, lform);
4480 }
4481
4482 /// MemberName accessors
4483
4484 oop java_lang_invoke_MemberName::clazz(oop mname) {
4485 assert(is_instance(mname), "wrong type");
4486 return mname->obj_field(_clazz_offset);
4487 }
4488
4489 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4490 assert(is_instance(mname), "wrong type");
4491 mname->obj_field_put(_clazz_offset, clazz);
4492 }
4493
4494 oop java_lang_invoke_MemberName::name(oop mname) {
4495 assert(is_instance(mname), "wrong type");
4496 return mname->obj_field(_name_offset);
4497 }
4498
4499 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4500 assert(is_instance(mname), "wrong type");
4501 mname->obj_field_put(_name_offset, name);
4502 }
4503
4504 oop java_lang_invoke_MemberName::type(oop mname) {
4505 assert(is_instance(mname), "wrong type");
4506 return mname->obj_field(_type_offset);
4507 }
4508
4509 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4510 assert(is_instance(mname), "wrong type");
4511 mname->obj_field_put(_type_offset, type);
4512 }
4513
4514 int java_lang_invoke_MemberName::flags(oop mname) {
4515 assert(is_instance(mname), "wrong type");
4516 return mname->int_field(_flags_offset);
4517 }
4518
4519 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4520 assert(is_instance(mname), "wrong type");
4521 mname->int_field_put(_flags_offset, flags);
4522 }
4523
4524
4525 // Return vmtarget from ResolvedMethodName method field through indirection
4526 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4527 assert(is_instance(mname), "wrong type");
4528 oop method = mname->obj_field(_method_offset);
4529 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4530 }
4531
4532 bool java_lang_invoke_MemberName::is_method(oop mname) {
4533 assert(is_instance(mname), "must be MemberName");
4534 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
4535 }
4536
4537 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4538 assert(is_instance(mname), "wrong type");
4539 mname->obj_field_put(_method_offset, resolved_method);
4540 }
4541
4542 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4543 assert(is_instance(mname), "wrong type");
4544 return (intptr_t) mname->address_field(_vmindex_offset);
4545 }
4546
4547 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4548 assert(is_instance(mname), "wrong type");
4549 mname->address_field_put(_vmindex_offset, (address) index);
4550 }
4551
4552
4553 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4554 assert(is_instance(resolved_method), "wrong type");
4555 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4556 assert(m->is_method(), "must be");
4557 return m;
4558 }
4559
4560 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4561 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4562 assert(is_instance(resolved_method), "wrong type");
4563 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4564 }
4565
4566 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4567 assert(is_instance(resolved_method), "wrong type");
4568 resolved_method->obj_field_put(_vmholder_offset, holder);
4569 }
4570
4571 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4572 const Method* method = m();
4573
4574 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4575 oop resolved_method = ResolvedMethodTable::find_method(method);
4576 if (resolved_method != nullptr) {
4577 return resolved_method;
4578 }
4579
4580 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4581 if (!k->is_initialized()) {
4582 k->initialize(CHECK_NULL);
4583 }
4584
4585 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4586
4587 NoSafepointVerifier nsv;
4588
4589 if (method->is_old()) {
4590 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4591 method->get_new_method();
4592 }
4593
4594 InstanceKlass* holder = method->method_holder();
4595
4596 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4597 // Add a reference to the loader (actually mirror because hidden classes may not have
4598 // distinct loaders) to ensure the metadata is kept alive.
4599 // This mirror may be different than the one in clazz field.
4600 set_vmholder(new_resolved_method, holder->java_mirror());
4601
4602 // Set flag in class to indicate this InstanceKlass has entries in the table
4603 // to avoid walking table during redefinition if none of the redefined classes
4604 // have any membernames in the table.
4605 holder->set_has_resolved_methods();
4606
4607 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4608 }
4609
4610 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4611 assert(is_instance(lform), "wrong type");
4612 return lform->obj_field(_vmentry_offset);
4613 }
4614
4615
4616 // Support for java_lang_invoke_MethodType
4617
4618 int java_lang_invoke_MethodType::_rtype_offset;
4619 int java_lang_invoke_MethodType::_ptypes_offset;
4620
4621 #define METHODTYPE_FIELDS_DO(macro) \
4622 macro(_rtype_offset, k, "rtype", class_signature, false); \
4623 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4624
4625 void java_lang_invoke_MethodType::compute_offsets() {
4626 InstanceKlass* k = vmClasses::MethodType_klass();
4627 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4628 }
4629
4630 #if INCLUDE_CDS
4631 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4632 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4633 }
4634 #endif
4635
4636 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4637 st->print("(");
4638 objArrayOop pts = ptypes(mt);
4639 if (pts != nullptr) {
4640 for (int i = 0, limit = pts->length(); i < limit; i++) {
4641 java_lang_Class::print_signature(pts->obj_at(i), st);
4642 }
4643 } else {
4644 st->print("null");
4645 }
4646 st->print(")");
4647 oop rt = rtype(mt);
4648 if (rt != nullptr) {
4649 java_lang_Class::print_signature(rt, st);
4650 } else {
4651 st->print("null");
4652 }
4653 }
4654
4655 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4656 ResourceMark rm;
4657 stringStream buffer(128);
4658 print_signature(mt, &buffer);
4659 const char* sigstr = buffer.base();
4660 int siglen = (int) buffer.size();
4661 Symbol *name;
4662 if (!intern_if_not_found) {
4663 name = SymbolTable::probe(sigstr, siglen);
4664 } else {
4665 name = SymbolTable::new_symbol(sigstr, siglen);
4666 }
4667 return name;
4668 }
4669
4670 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4671 if (mt1 == mt2)
4672 return true;
4673 if (rtype(mt1) != rtype(mt2))
4674 return false;
4675 if (ptype_count(mt1) != ptype_count(mt2))
4676 return false;
4677 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4678 if (ptype(mt1, i) != ptype(mt2, i))
4679 return false;
4680 }
4681 return true;
4682 }
4683
4684 oop java_lang_invoke_MethodType::rtype(oop mt) {
4685 assert(is_instance(mt), "must be a MethodType");
4686 return mt->obj_field(_rtype_offset);
4687 }
4688
4689 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4690 assert(is_instance(mt), "must be a MethodType");
4691 return (objArrayOop) mt->obj_field(_ptypes_offset);
4692 }
4693
4694 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4695 return ptypes(mt)->obj_at(idx);
4696 }
4697
4698 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4699 return ptypes(mt)->length();
4700 }
4701
4702 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4703 objArrayOop pts = ptypes(mt);
4704 int count = pts->length();
4705 int slots = 0;
4706 for (int i = 0; i < count; i++) {
4707 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4708 slots += type2size[bt];
4709 }
4710 return slots;
4711 }
4712
4713 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4714 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4715 return type2size[bt];
4716 }
4717
4718
4719 // Support for java_lang_invoke_CallSite
4720
4721 int java_lang_invoke_CallSite::_target_offset;
4722 int java_lang_invoke_CallSite::_vmdependencies_offset;
4723 int java_lang_invoke_CallSite::_last_cleanup_offset;
4724
4725 #define CALLSITE_FIELDS_DO(macro) \
4726 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
4727
4728 void java_lang_invoke_CallSite::compute_offsets() {
4729 InstanceKlass* k = vmClasses::CallSite_klass();
4730 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4731 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4732 }
4733
4734 #if INCLUDE_CDS
4735 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4736 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4737 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4738 }
4739 #endif
4740
4741 DependencyContext java_lang_invoke_CallSite::vmdependencies(oop call_site) {
4742 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4743 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4744 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4745 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4746 return dep_ctx;
4747 }
4748
4749 // Support for java_lang_invoke_ConstantCallSite
4750
4751 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4752
4753 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4754 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4755
4756 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4757 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4758 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4759 }
4760
4761 #if INCLUDE_CDS
4762 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4763 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4764 }
4765 #endif
4766
4767 // Support for java_lang_ClassLoader
4768
4769 int java_lang_ClassLoader::_loader_data_offset;
4770 int java_lang_ClassLoader::_parallelCapable_offset;
4771 int java_lang_ClassLoader::_name_offset;
4772 int java_lang_ClassLoader::_nameAndId_offset;
4773 int java_lang_ClassLoader::_unnamedModule_offset;
4774 int java_lang_ClassLoader::_parent_offset;
4775
4776 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4777 assert(loader != nullptr, "loader must not be null");
4778 assert(oopDesc::is_oop(loader), "loader must be oop");
4779 return AtomicAccess::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4780 }
4781
4782 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4783 assert(loader != nullptr, "loader must not be null");
4784 assert(oopDesc::is_oop(loader), "loader must be oop");
4785 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4786 }
4787
4788 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4789 assert(loader != nullptr, "loader must not be null");
4790 assert(oopDesc::is_oop(loader), "loader must be oop");
4791 AtomicAccess::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4792 }
4793
4794 #define CLASSLOADER_FIELDS_DO(macro) \
4795 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4796 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4797 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
4798 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4799 macro(_parent_offset, k1, "parent", classloader_signature, false)
4800
4801 void java_lang_ClassLoader::compute_offsets() {
4802 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4803 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4804
4805 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4806 }
4807
4808 #if INCLUDE_CDS
4809 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4810 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4811 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4812 }
4813 #endif
4814
4815 oop java_lang_ClassLoader::parent(oop loader) {
4816 assert(is_instance(loader), "loader must be oop");
4817 return loader->obj_field(_parent_offset);
4818 }
4819
4820 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4821 assert(is_instance(loader), "loader must be oop");
4822 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4823 }
4824
4825 // Returns the name field of this class loader. If the name field has not
4826 // been set, null will be returned.
4827 oop java_lang_ClassLoader::name(oop loader) {
4828 assert(is_instance(loader), "loader must be oop");
4829 return loader->obj_field(_name_offset);
4830 }
4831
4832 // Returns the nameAndId field of this class loader. The format is
4833 // as follows:
4834 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4835 // If the defining loader has no name then <qualified-class-name> @<id>
4836 // If built-in loader, then omit '@<id>' as there is only one instance.
4837 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4838 oop java_lang_ClassLoader::nameAndId(oop loader) {
4839 assert(is_instance(loader), "loader must be oop");
4840 return loader->obj_field(_nameAndId_offset);
4841 }
4842
4843 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4844 assert(is_instance(loader), "loader must be oop");
4845 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4846 oop acl = loader;
4847 DEBUG_ONLY(jint loop_count = 0);
4848 // This loop taken verbatim from ClassLoader.java:
4849 do {
4850 acl = parent(acl);
4851 if (cl == acl) {
4852 return true;
4853 }
4854 assert(++loop_count > 0, "loop_count overflow");
4855 } while (acl != nullptr);
4856 return false;
4857 }
4858
4859 bool java_lang_ClassLoader::is_instance(oop obj) {
4860 return obj != nullptr && is_subclass(obj->klass());
4861 }
4862
4863
4864 // For class loader classes, parallelCapable defined
4865 // based on non-null field
4866 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4867 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4868 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4869 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4870 }
4871
4872 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4873 oop cl = SystemDictionary::java_system_loader();
4874 while(cl != nullptr) {
4875 if (cl == loader) return true;
4876 cl = parent(cl);
4877 }
4878 return false;
4879 }
4880
4881 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4882 assert(is_instance(loader), "loader must be oop");
4883 return loader->obj_field(_unnamedModule_offset);
4884 }
4885
4886 // Support for java_lang_System
4887 //
4888
4889 int java_lang_System::_static_in_offset;
4890 int java_lang_System::_static_out_offset;
4891 int java_lang_System::_static_err_offset;
4892
4893 #define SYSTEM_FIELDS_DO(macro) \
4894 macro(_static_in_offset, k, "in", input_stream_signature, true); \
4895 macro(_static_out_offset, k, "out", print_stream_signature, true); \
4896 macro(_static_err_offset, k, "err", print_stream_signature, true);
4897
4898 void java_lang_System::compute_offsets() {
4899 InstanceKlass* k = vmClasses::System_klass();
4900 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4901 }
4902
4903 #if INCLUDE_CDS
4904 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4905 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4906 }
4907 #endif
4908
4909 // Support for jdk_internal_misc_UnsafeConstants
4910 //
4911 class UnsafeConstantsFixup : public FieldClosure {
4912 private:
4913 int _address_size;
4914 int _page_size;
4915 bool _big_endian;
4916 bool _use_unaligned_access;
4917 int _data_cache_line_flush_size;
4918 public:
4919 UnsafeConstantsFixup() {
4920 // round up values for all static final fields
4921 _address_size = sizeof(void*);
4922 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4923 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4924 _use_unaligned_access = UseUnalignedAccesses;
4925 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4926 }
4927
4928 void do_field(fieldDescriptor* fd) {
4929 oop mirror = fd->field_holder()->java_mirror();
4930 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4931 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4932 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4933 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4934 if (fd->name() == vmSymbols::address_size_name()) {
4935 mirror->int_field_put(fd->offset(), _address_size);
4936 } else if (fd->name() == vmSymbols::page_size_name()) {
4937 mirror->int_field_put(fd->offset(), _page_size);
4938 } else if (fd->name() == vmSymbols::big_endian_name()) {
4939 mirror->bool_field_put(fd->offset(), _big_endian);
4940 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4941 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4942 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4943 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4944 } else {
4945 assert(false, "unexpected UnsafeConstants field");
4946 }
4947 }
4948 };
4949
4950 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4951 UnsafeConstantsFixup fixup;
4952 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4953 }
4954
4955
4956 // java_lang_StackTraceElement
4957
4958 int java_lang_StackTraceElement::_methodName_offset;
4959 int java_lang_StackTraceElement::_fileName_offset;
4960 int java_lang_StackTraceElement::_lineNumber_offset;
4961 int java_lang_StackTraceElement::_moduleName_offset;
4962 int java_lang_StackTraceElement::_moduleVersion_offset;
4963 int java_lang_StackTraceElement::_classLoaderName_offset;
4964 int java_lang_StackTraceElement::_declaringClass_offset;
4965 int java_lang_StackTraceElement::_declaringClassObject_offset;
4966
4967 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4968 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4969 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4970 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
4971 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4972 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
4973 macro(_methodName_offset, k, "methodName", string_signature, false); \
4974 macro(_fileName_offset, k, "fileName", string_signature, false); \
4975 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
4976
4977 // Support for java_lang_StackTraceElement
4978 void java_lang_StackTraceElement::compute_offsets() {
4979 InstanceKlass* k = vmClasses::StackTraceElement_klass();
4980 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4981 }
4982
4983 #if INCLUDE_CDS
4984 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4985 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4986 }
4987 #endif
4988
4989 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4990 element->obj_field_put(_fileName_offset, value);
4991 }
4992
4993 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4994 element->obj_field_put(_declaringClass_offset, value);
4995 }
4996
4997 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4998 element->obj_field_put(_methodName_offset, value);
4999 }
5000
5001 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
5002 element->int_field_put(_lineNumber_offset, value);
5003 }
5004
5005 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
5006 element->obj_field_put(_moduleName_offset, value);
5007 }
5008
5009 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
5010 element->obj_field_put(_moduleVersion_offset, value);
5011 }
5012
5013 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
5014 element->obj_field_put(_classLoaderName_offset, value);
5015 }
5016
5017 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
5018 element->obj_field_put(_declaringClassObject_offset, value);
5019 }
5020
5021
5022 // java_lang_AssertionStatusDirectives
5023
5024 int java_lang_AssertionStatusDirectives::_classes_offset;
5025 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
5026 int java_lang_AssertionStatusDirectives::_packages_offset;
5027 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
5028 int java_lang_AssertionStatusDirectives::_deflt_offset;
5029
5030 // Support for java Assertions - java_lang_AssertionStatusDirectives.
5031 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
5032 macro(_classes_offset, k, "classes", string_array_signature, false); \
5033 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
5034 macro(_packages_offset, k, "packages", string_array_signature, false); \
5035 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
5036 macro(_deflt_offset, k, "deflt", bool_signature, false)
5037
5038 void java_lang_AssertionStatusDirectives::compute_offsets() {
5039 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
5040 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5041 }
5042
5043 #if INCLUDE_CDS
5044 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
5045 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5046 }
5047 #endif
5048
5049 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
5050 o->obj_field_put(_classes_offset, val);
5051 }
5052
5053 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
5054 o->obj_field_put(_classEnabled_offset, val);
5055 }
5056
5057 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
5058 o->obj_field_put(_packages_offset, val);
5059 }
5060
5061 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
5062 o->obj_field_put(_packageEnabled_offset, val);
5063 }
5064
5065 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
5066 o->bool_field_put(_deflt_offset, val);
5067 }
5068
5069 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
5070
5071 #define AOS_FIELDS_DO(macro) \
5072 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
5073
5074 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
5075 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
5076 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5077 }
5078
5079 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
5080 assert(_owner_offset != 0, "Must be initialized");
5081 return obj->obj_field(_owner_offset);
5082 }
5083
5084 #if INCLUDE_CDS
5085 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
5086 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5087 }
5088 #endif
5089
5090 int vector_VectorPayload::_payload_offset;
5091
5092 #define VECTORPAYLOAD_FIELDS_DO(macro) \
5093 macro(_payload_offset, k, "payload", object_signature, false)
5094
5095 void vector_VectorPayload::compute_offsets() {
5096 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
5097 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5098 }
5099
5100 #if INCLUDE_CDS
5101 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
5102 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5103 }
5104 #endif
5105
5106 void vector_VectorPayload::set_payload(oop o, oop val) {
5107 o->obj_field_put(_payload_offset, val);
5108 }
5109
5110 bool vector_VectorPayload::is_instance(oop obj) {
5111 return obj != nullptr && is_subclass(obj->klass());
5112 }
5113
5114 int java_lang_Integer_IntegerCache::_static_cache_offset;
5115 int java_lang_Long_LongCache::_static_cache_offset;
5116 int java_lang_Character_CharacterCache::_static_cache_offset;
5117 int java_lang_Short_ShortCache::_static_cache_offset;
5118 int java_lang_Byte_ByteCache::_static_cache_offset;
5119
5120 #define INTEGER_CACHE_FIELDS_DO(macro) \
5121 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5122
5123 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5124 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5125 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5126 }
5127
5128 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5129 oop base = ik->static_field_base_raw();
5130 return objArrayOop(base->obj_field(_static_cache_offset));
5131 }
5132
5133 Symbol* java_lang_Integer_IntegerCache::symbol() {
5134 return vmSymbols::java_lang_Integer_IntegerCache();
5135 }
5136
5137 #if INCLUDE_CDS
5138 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5139 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5140 }
5141 #endif
5142 #undef INTEGER_CACHE_FIELDS_DO
5143
5144 jint java_lang_Integer::value(oop obj) {
5145 jvalue v;
5146 java_lang_boxing_object::get_value(obj, &v);
5147 return v.i;
5148 }
5149
5150 #define LONG_CACHE_FIELDS_DO(macro) \
5151 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5152
5153 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5154 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5155 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5156 }
5157
5158 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5159 oop base = ik->static_field_base_raw();
5160 return objArrayOop(base->obj_field(_static_cache_offset));
5161 }
5162
5163 Symbol* java_lang_Long_LongCache::symbol() {
5164 return vmSymbols::java_lang_Long_LongCache();
5165 }
5166
5167 #if INCLUDE_CDS
5168 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5169 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5170 }
5171 #endif
5172 #undef LONG_CACHE_FIELDS_DO
5173
5174 jlong java_lang_Long::value(oop obj) {
5175 jvalue v;
5176 java_lang_boxing_object::get_value(obj, &v);
5177 return v.j;
5178 }
5179
5180 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5181 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5182
5183 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5184 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5185 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5186 }
5187
5188 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5189 oop base = ik->static_field_base_raw();
5190 return objArrayOop(base->obj_field(_static_cache_offset));
5191 }
5192
5193 Symbol* java_lang_Character_CharacterCache::symbol() {
5194 return vmSymbols::java_lang_Character_CharacterCache();
5195 }
5196
5197 #if INCLUDE_CDS
5198 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5199 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5200 }
5201 #endif
5202 #undef CHARACTER_CACHE_FIELDS_DO
5203
5204 jchar java_lang_Character::value(oop obj) {
5205 jvalue v;
5206 java_lang_boxing_object::get_value(obj, &v);
5207 return v.c;
5208 }
5209
5210 #define SHORT_CACHE_FIELDS_DO(macro) \
5211 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5212
5213 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5214 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5215 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5216 }
5217
5218 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5219 oop base = ik->static_field_base_raw();
5220 return objArrayOop(base->obj_field(_static_cache_offset));
5221 }
5222
5223 Symbol* java_lang_Short_ShortCache::symbol() {
5224 return vmSymbols::java_lang_Short_ShortCache();
5225 }
5226
5227 #if INCLUDE_CDS
5228 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5229 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5230 }
5231 #endif
5232 #undef SHORT_CACHE_FIELDS_DO
5233
5234 jshort java_lang_Short::value(oop obj) {
5235 jvalue v;
5236 java_lang_boxing_object::get_value(obj, &v);
5237 return v.s;
5238 }
5239
5240 #define BYTE_CACHE_FIELDS_DO(macro) \
5241 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5242
5243 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5244 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5245 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5246 }
5247
5248 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5249 oop base = ik->static_field_base_raw();
5250 return objArrayOop(base->obj_field(_static_cache_offset));
5251 }
5252
5253 Symbol* java_lang_Byte_ByteCache::symbol() {
5254 return vmSymbols::java_lang_Byte_ByteCache();
5255 }
5256
5257 #if INCLUDE_CDS
5258 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5259 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5260 }
5261 #endif
5262 #undef BYTE_CACHE_FIELDS_DO
5263
5264 jbyte java_lang_Byte::value(oop obj) {
5265 jvalue v;
5266 java_lang_boxing_object::get_value(obj, &v);
5267 return v.b;
5268 }
5269
5270 int java_lang_Boolean::_static_TRUE_offset;
5271 int java_lang_Boolean::_static_FALSE_offset;
5272
5273 #define BOOLEAN_FIELDS_DO(macro) \
5274 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5275 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5276
5277
5278 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5279 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5280 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5281 }
5282
5283 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5284 oop base = ik->static_field_base_raw();
5285 return base->obj_field(_static_TRUE_offset);
5286 }
5287
5288 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5289 oop base = ik->static_field_base_raw();
5290 return base->obj_field(_static_FALSE_offset);
5291 }
5292
5293 Symbol* java_lang_Boolean::symbol() {
5294 return vmSymbols::java_lang_Boolean();
5295 }
5296
5297 #if INCLUDE_CDS
5298 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5299 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5300 }
5301 #endif
5302 #undef BOOLEAN_CACHE_FIELDS_DO
5303
5304 jboolean java_lang_Boolean::value(oop obj) {
5305 jvalue v;
5306 java_lang_boxing_object::get_value(obj, &v);
5307 return v.z;
5308 }
5309
5310 // java_lang_reflect_RecordComponent
5311
5312 int java_lang_reflect_RecordComponent::_clazz_offset;
5313 int java_lang_reflect_RecordComponent::_name_offset;
5314 int java_lang_reflect_RecordComponent::_type_offset;
5315 int java_lang_reflect_RecordComponent::_accessor_offset;
5316 int java_lang_reflect_RecordComponent::_signature_offset;
5317 int java_lang_reflect_RecordComponent::_annotations_offset;
5318 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5319
5320 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5321 macro(_clazz_offset, k, "clazz", class_signature, false); \
5322 macro(_name_offset, k, "name", string_signature, false); \
5323 macro(_type_offset, k, "type", class_signature, false); \
5324 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5325 macro(_signature_offset, k, "signature", string_signature, false); \
5326 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5327 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5328
5329 // Support for java_lang_reflect_RecordComponent
5330 void java_lang_reflect_RecordComponent::compute_offsets() {
5331 InstanceKlass* k = vmClasses::RecordComponent_klass();
5332 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5333 }
5334
5335 #if INCLUDE_CDS
5336 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5337 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5338 }
5339 #endif
5340
5341 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5342 element->obj_field_put(_clazz_offset, value);
5343 }
5344
5345 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5346 element->obj_field_put(_name_offset, value);
5347 }
5348
5349 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5350 element->obj_field_put(_type_offset, value);
5351 }
5352
5353 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5354 element->obj_field_put(_accessor_offset, value);
5355 }
5356
5357 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5358 element->obj_field_put(_signature_offset, value);
5359 }
5360
5361 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5362 element->obj_field_put(_annotations_offset, value);
5363 }
5364
5365 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5366 element->obj_field_put(_typeAnnotations_offset, value);
5367 }
5368
5369 // java_lang_InternalError
5370 int java_lang_InternalError::_during_unsafe_access_offset;
5371
5372 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5373 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5374 }
5375
5376 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5377 return internal_error->bool_field(_during_unsafe_access_offset);
5378 }
5379
5380 void java_lang_InternalError::compute_offsets() {
5381 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5382 }
5383
5384 #if INCLUDE_CDS
5385 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5386 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5387 }
5388 #endif
5389
5390 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5391 f(java_lang_Class) \
5392 f(java_lang_String) \
5393 f(java_lang_ref_Reference) \
5394 //end
5395
5396 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5397 f(java_lang_System) \
5398 f(java_lang_ClassLoader) \
5399 f(java_lang_Throwable) \
5400 f(java_lang_Thread) \
5401 f(java_lang_Thread_FieldHolder) \
5402 f(java_lang_Thread_Constants) \
5403 f(java_lang_ThreadGroup) \
5404 f(java_lang_VirtualThread) \
5405 f(java_lang_InternalError) \
5406 f(java_lang_AssertionStatusDirectives) \
5407 f(java_lang_ref_SoftReference) \
5408 f(java_lang_invoke_MethodHandle) \
5409 f(java_lang_invoke_DirectMethodHandle) \
5410 f(java_lang_invoke_MemberName) \
5411 f(java_lang_invoke_ResolvedMethodName) \
5412 f(java_lang_invoke_LambdaForm) \
5413 f(java_lang_invoke_MethodType) \
5414 f(java_lang_invoke_CallSite) \
5415 f(java_lang_invoke_ConstantCallSite) \
5416 f(java_lang_reflect_AccessibleObject) \
5417 f(java_lang_reflect_Method) \
5418 f(java_lang_reflect_Constructor) \
5419 f(java_lang_reflect_Field) \
5420 f(java_lang_reflect_RecordComponent) \
5421 f(reflect_ConstantPool) \
5422 f(java_lang_reflect_Parameter) \
5423 f(java_lang_Module) \
5424 f(java_lang_StackTraceElement) \
5425 f(java_lang_ClassFrameInfo) \
5426 f(java_lang_StackFrameInfo) \
5427 f(java_lang_LiveStackFrameInfo) \
5428 f(jdk_internal_vm_ContinuationScope) \
5429 f(jdk_internal_vm_Continuation) \
5430 f(jdk_internal_vm_StackChunk) \
5431 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5432 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5433 f(jdk_internal_foreign_abi_ABIDescriptor) \
5434 f(jdk_internal_foreign_abi_VMStorage) \
5435 f(jdk_internal_foreign_abi_CallConv) \
5436 f(jdk_internal_misc_UnsafeConstants) \
5437 f(java_lang_boxing_object) \
5438 f(vector_VectorPayload) \
5439 //end
5440
5441 #define BASIC_JAVA_CLASSES_DO(f) \
5442 BASIC_JAVA_CLASSES_DO_PART1(f) \
5443 BASIC_JAVA_CLASSES_DO_PART2(f)
5444
5445 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5446
5447 // Compute field offsets of all the classes in this file
5448 void JavaClasses::compute_offsets() {
5449 if (CDSConfig::is_using_archive()) {
5450 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5451 JvmtiExport::has_early_class_hook_env()),
5452 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5453 // None of the classes used by the rest of this function can be replaced by
5454 // JVMTI ClassFileLoadHook.
5455 // We are safe to use the archived offsets, which have already been restored
5456 // by JavaClasses::serialize_offsets, without computing the offsets again.
5457 return;
5458 }
5459
5460 // We have already called the compute_offsets() of the
5461 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5462 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5463 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5464 }
5465
5466 #if INCLUDE_CDS
5467 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5468
5469 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5470 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5471 }
5472 #endif
5473
5474 #if INCLUDE_CDS_JAVA_HEAP
5475 bool JavaClasses::is_supported_for_archiving(oop obj) {
5476 Klass* klass = obj->klass();
5477
5478 if (!CDSConfig::is_dumping_method_handles()) {
5479 // These are supported by CDS only when CDSConfig::is_dumping_method_handles() is enabled.
5480 if (klass == vmClasses::ResolvedMethodName_klass() ||
5481 klass == vmClasses::MemberName_klass()) {
5482 return false;
5483 }
5484 }
5485
5486 if (!AOTReferenceObjSupport::is_enabled() && klass->is_subclass_of(vmClasses::Reference_klass())) {
5487 return false;
5488 }
5489
5490 return true;
5491 }
5492 #endif
5493
5494 #ifndef PRODUCT
5495
5496 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5497
5498 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5499 const char* field_sig) {
5500 EXCEPTION_MARK;
5501 fieldDescriptor fd;
5502 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5503 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5504 InstanceKlass* ik = InstanceKlass::cast(k);
5505 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5506 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5507 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5508 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5509 return false;
5510 }
5511 if (fd.is_static()) {
5512 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5513 return false;
5514 }
5515 if (fd.offset() == deserialized_offset ) {
5516 return true;
5517 } else {
5518 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5519 klass_name, field_name, deserialized_offset, fd.offset());
5520 return false;
5521 }
5522 }
5523
5524 void JavaClasses::check_offsets() {
5525 bool valid = true;
5526
5527 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5528 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5529
5530 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5531 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5532
5533 // Boxed primitive objects (java_lang_boxing_object)
5534
5535 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
5536 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5537 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
5538 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5539 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
5540 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
5541 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
5542 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5543
5544 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5545 }
5546
5547 #endif // PRODUCT
5548
5549 int InjectedField::compute_offset() {
5550 InstanceKlass* ik = klass();
5551 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5552 if (!may_be_java && !fs.field_flags().is_injected()) {
5553 // Only look at injected fields
5554 continue;
5555 }
5556 if (fs.name() == name() && fs.signature() == signature()) {
5557 return fs.offset();
5558 }
5559 }
5560 ResourceMark rm;
5561 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)" : "");
5562 #ifndef PRODUCT
5563 ik->print();
5564 tty->print_cr("all fields:");
5565 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5566 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());
5567 }
5568 #endif //PRODUCT
5569 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5570 return -1;
5571 }
5572
5573 void javaClasses_init() {
5574 JavaClasses::compute_offsets();
5575 JavaClasses::check_offsets();
5576 }