1 /*
2 * Copyright (c) 1997, 2026, 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/cdsConfig.hpp"
29 #include "cds/heapShared.inline.hpp"
30 #include "classfile/altHashing.hpp"
31 #include "classfile/classLoaderData.inline.hpp"
32 #include "classfile/javaClasses.inline.hpp"
33 #include "classfile/javaClassesImpl.hpp"
34 #include "classfile/javaThreadStatus.hpp"
35 #include "classfile/moduleEntry.hpp"
36 #include "classfile/stringTable.hpp"
37 #include "classfile/symbolTable.hpp"
38 #include "classfile/systemDictionary.hpp"
39 #include "classfile/vmClasses.hpp"
40 #include "classfile/vmSymbols.hpp"
41 #include "code/debugInfo.hpp"
42 #include "code/dependencyContext.hpp"
43 #include "code/pcDesc.hpp"
44 #include "gc/shared/collectedHeap.inline.hpp"
45 #include "interpreter/interpreter.hpp"
46 #include "interpreter/linkResolver.hpp"
47 #include "jvm.h"
48 #include "logging/log.hpp"
49 #include "logging/logStream.hpp"
50 #include "memory/oopFactory.hpp"
51 #include "memory/resourceArea.hpp"
52 #include "memory/universe.hpp"
53 #include "oops/fieldInfo.hpp"
54 #include "oops/fieldStreams.inline.hpp"
55 #include "oops/flatArrayKlass.hpp"
56 #include "oops/inlineKlass.inline.hpp"
57 #include "oops/instanceKlass.inline.hpp"
58 #include "oops/instanceMirrorKlass.inline.hpp"
59 #include "oops/klass.inline.hpp"
60 #include "oops/method.inline.hpp"
61 #include "oops/objArrayKlass.hpp"
62 #include "oops/objArrayOop.inline.hpp"
63 #include "oops/oop.inline.hpp"
64 #include "oops/oopCast.inline.hpp"
65 #include "oops/recordComponent.hpp"
66 #include "oops/refArrayOop.inline.hpp"
67 #include "oops/symbol.hpp"
68 #include "oops/typeArrayOop.inline.hpp"
69 #include "prims/jvmtiExport.hpp"
70 #include "prims/methodHandles.hpp"
71 #include "prims/resolvedMethodTable.hpp"
72 #include "runtime/continuationEntry.inline.hpp"
73 #include "runtime/continuationJavaClasses.inline.hpp"
74 #include "runtime/fieldDescriptor.inline.hpp"
75 #include "runtime/frame.inline.hpp"
76 #include "runtime/handles.inline.hpp"
77 #include "runtime/handshake.hpp"
78 #include "runtime/init.hpp"
79 #include "runtime/interfaceSupport.inline.hpp"
80 #include "runtime/java.hpp"
81 #include "runtime/javaCalls.hpp"
82 #include "runtime/javaThread.hpp"
83 #include "runtime/jniHandles.inline.hpp"
84 #include "runtime/reflection.hpp"
85 #include "runtime/safepoint.hpp"
86 #include "runtime/safepointVerifiers.hpp"
87 #include "runtime/threadSMR.hpp"
88 #include "runtime/vframe.inline.hpp"
89 #include "runtime/vm_version.hpp"
90 #include "utilities/align.hpp"
91 #include "utilities/globalDefinitions.hpp"
92 #include "utilities/growableArray.hpp"
93 #include "utilities/preserveException.hpp"
94 #include "utilities/utf8.hpp"
95
96 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
97 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
98
99 InjectedField JavaClasses::_injected_fields[] = {
100 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
101 };
102
103 // Register native methods of Object
104 void java_lang_Object::register_natives(TRAPS) {
105 InstanceKlass* obj = vmClasses::Object_klass();
106 Method::register_native(obj, vmSymbols::hashCode_name(),
107 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
108 Method::register_native(obj, vmSymbols::wait_name(),
109 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
110 Method::register_native(obj, vmSymbols::notify_name(),
111 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
112 Method::register_native(obj, vmSymbols::notifyAll_name(),
113 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
114 Method::register_native(obj, vmSymbols::clone_name(),
115 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
116 }
117
118 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
119 return _injected_fields[(int)id].compute_offset();
120 }
121
122 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
123 *field_count = 0;
124
125 vmSymbolID sid = vmSymbols::find_sid(class_name);
126 if (sid == vmSymbolID::NO_SID) {
127 // Only well known classes can inject fields
128 return nullptr;
129 }
130
131 int count = 0;
132 int start = -1;
133
134 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
135 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \
136 count++; \
137 if (start == -1) { \
138 start = (int)InjectedFieldID::klass##_##name##_enum; \
139 } \
140 }
141 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
142 #undef LOOKUP_INJECTED_FIELD
143
144 if (start != -1) {
145 *field_count = count;
146 return _injected_fields + start;
147 }
148 return nullptr;
149 }
150
151
152 // Helpful routine for computing field offsets at run time rather than hardcoding them
153 // Finds local fields only, including static fields. Static field offsets are from the
154 // beginning of the mirror.
155 void JavaClasses::compute_offset(int &dest_offset,
156 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
157 bool is_static) {
158 fieldDescriptor fd;
159 if (ik == nullptr) {
160 ResourceMark rm;
161 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
162 vm_exit_during_initialization("Invalid layout of well-known class");
163 }
164
165 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
166 ResourceMark rm;
167 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
168 name_symbol->as_C_string(), signature_symbol->as_C_string());
169 #ifndef PRODUCT
170 // Prints all fields and offsets
171 Log(class) lt;
172 LogStream ls(lt.error());
173 ik->print_on(&ls);
174 #endif //PRODUCT
175 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
176 }
177 dest_offset = fd.offset();
178 }
179
180 // Overloading to pass name as a string.
181 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
182 const char* name_string, Symbol* signature_symbol,
183 bool is_static) {
184 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
185 if (name == nullptr) {
186 ResourceMark rm;
187 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
188 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
189 }
190 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
191 }
192
193 // java_lang_String
194
195 int java_lang_String::_value_offset;
196 int java_lang_String::_hash_offset;
197 int java_lang_String::_hashIsZero_offset;
198 int java_lang_String::_coder_offset;
199 int java_lang_String::_flags_offset;
200
201 bool java_lang_String::_initialized;
202
203
204 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
205 uint8_t* addr = flags_addr(java_string);
206 uint8_t value = AtomicAccess::load(addr);
207 while ((value & flag_mask) == 0) {
208 uint8_t old_value = value;
209 value |= flag_mask;
210 value = AtomicAccess::cmpxchg(addr, old_value, value);
211 if (value == old_value) return false; // Flag bit changed from 0 to 1.
212 }
213 return true; // Flag bit is already 1.
214 }
215
216 #define STRING_FIELDS_DO(macro) \
217 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
218 macro(_hash_offset, k, "hash", int_signature, false); \
219 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
220 macro(_coder_offset, k, "coder", byte_signature, false);
221
222 void java_lang_String::compute_offsets() {
223 if (_initialized) {
224 return;
225 }
226
227 InstanceKlass* k = vmClasses::String_klass();
228 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
229 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
230
231 _initialized = true;
232 }
233
234 #if INCLUDE_CDS
235 void java_lang_String::serialize_offsets(SerializeClosure* f) {
236 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
237 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
238 f->do_bool(&_initialized);
239 }
240 #endif
241
242 class CompactStringsFixup : public FieldClosure {
243 private:
244 bool _value;
245
246 public:
247 CompactStringsFixup(bool value) : _value(value) {}
248
249 void do_field(fieldDescriptor* fd) {
250 if (fd->name() == vmSymbols::compact_strings_name()) {
251 oop mirror = fd->field_holder()->java_mirror();
252 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String");
253 assert(mirror != nullptr, "String must have mirror already");
254 mirror->bool_field_put(fd->offset(), _value);
255 }
256 }
257 };
258
259 void java_lang_String::set_compact_strings(bool value) {
260 CompactStringsFixup fix(value);
261 vmClasses::String_klass()->do_local_static_fields(&fix);
262 }
263
264 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
265 assert(_initialized, "Must be initialized");
266 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
267
268 // Create the String object first, so there's a chance that the String
269 // and the char array it points to end up in the same cache line.
270 oop obj;
271 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH);
272
273 // Create the char array. The String object must be handlized here
274 // because GC can happen as a result of the allocation attempt.
275 Handle h_obj(THREAD, obj);
276 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
277 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
278
279 // Point the String at the char array
280 obj = h_obj();
281 set_value(obj, buffer);
282 // No need to zero the offset, allocation zero'ed the entire String object
283 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
284 return h_obj;
285 }
286
287 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
288 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
289 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
290 typeArrayOop buffer = value(h_obj());
291 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
292 if (is_latin1) {
293 for (int index = 0; index < length; index++) {
294 buffer->byte_at_put(index, (jbyte)unicode[index]);
295 }
296 } else {
297 for (int index = 0; index < length; index++) {
298 buffer->char_at_put(index, unicode[index]);
299 }
300 }
301
302 #ifdef ASSERT
303 {
304 ResourceMark rm;
305 size_t utf8_len = static_cast<size_t>(length);
306 char* expected = UNICODE::as_utf8(unicode, utf8_len);
307 char* actual = as_utf8_string(h_obj());
308 if (strcmp(expected, actual) != 0) {
309 fatal("Unicode conversion failure: %s --> %s", expected, actual);
310 }
311 }
312 #endif
313
314 return h_obj;
315 }
316
317 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
318 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
319 return h_obj();
320 }
321
322 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
323 if (utf8_str == nullptr) {
324 return Handle();
325 }
326 bool has_multibyte, is_latin1;
327 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
328 if (!CompactStrings) {
329 has_multibyte = true;
330 is_latin1 = false;
331 }
332
333 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
334 if (length > 0) {
335 if (!has_multibyte) {
336 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
337 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
338 } else if (is_latin1) {
339 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
340 } else {
341 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
342 }
343 }
344
345 #ifdef ASSERT
346 // This check is too strict when the input string is not a valid UTF8.
347 // For example, it may be created with arbitrary content via jni_NewStringUTF.
348 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, strlen(utf8_str), /*version_leq_47*/false)) {
349 ResourceMark rm;
350 const char* expected = utf8_str;
351 char* actual = as_utf8_string(h_obj());
352 if (strcmp(expected, actual) != 0) {
353 fatal("String conversion failure: %s --> %s", expected, actual);
354 }
355 }
356 #endif
357
358 return h_obj;
359 }
360
361 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
362 Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
363 return h_obj();
364 }
365
366 Handle java_lang_String::create_from_symbol(const Symbol* symbol, TRAPS) {
367 const char* utf8_str = (char*)symbol->bytes();
368 int utf8_len = symbol->utf8_length();
369
370 bool has_multibyte, is_latin1;
371 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
372 if (!CompactStrings) {
373 has_multibyte = true;
374 is_latin1 = false;
375 }
376
377 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
378 if (length > 0) {
379 if (!has_multibyte) {
380 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
381 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
382 } else if (is_latin1) {
383 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
384 } else {
385 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
386 }
387 }
388
389 #ifdef ASSERT
390 // This check is too strict on older classfile versions
391 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, utf8_len, /*version_leq_47*/false))
392 {
393 ResourceMark rm;
394 const char* expected = symbol->as_utf8();
395 char* actual = as_utf8_string(h_obj());
396 if (strncmp(expected, actual, utf8_len) != 0) {
397 fatal("Symbol conversion failure: %s --> %s", expected, actual);
398 }
399 }
400 #endif
401
402 return h_obj;
403 }
404
405 // Converts a C string to a Java String based on current encoding
406 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
407 assert(str != nullptr, "bad arguments");
408
409 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
410 static to_java_string_fn_t _to_java_string_fn = nullptr;
411
412 if (_to_java_string_fn == nullptr) {
413 void *lib_handle = os::native_java_library();
414 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
415 if (_to_java_string_fn == nullptr) {
416 fatal("JNU_NewStringPlatform missing");
417 }
418 }
419
420 jstring js = nullptr;
421 {
422 JavaThread* thread = THREAD;
423 HandleMark hm(thread);
424 ThreadToNativeFromVM ttn(thread);
425 js = (_to_java_string_fn)(thread->jni_environment(), str);
426 }
427
428 Handle native_platform_string(THREAD, JNIHandles::resolve(js));
429 JNIHandles::destroy_local(js); // destroy local JNIHandle.
430 return native_platform_string;
431 }
432
433 // Converts a Java String to a native C string that can be used for
434 // native OS calls.
435 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
436 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
437 static to_platform_string_fn_t _to_platform_string_fn = nullptr;
438
439 if (_to_platform_string_fn == nullptr) {
440 void *lib_handle = os::native_java_library();
441 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
442 if (_to_platform_string_fn == nullptr) {
443 fatal("GetStringPlatformChars missing");
444 }
445 }
446
447 char *native_platform_string;
448 jstring js;
449 { JavaThread* thread = THREAD;
450 js = (jstring) JNIHandles::make_local(thread, java_string());
451 HandleMark hm(thread);
452 ThreadToNativeFromVM ttn(thread);
453 JNIEnv *env = thread->jni_environment();
454 bool is_copy;
455 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
456 assert(is_copy == JNI_TRUE, "is_copy value changed");
457 }
458
459 // Uses a store barrier and therefore needs to be in vm state
460 JNIHandles::destroy_local(js);
461
462 return native_platform_string;
463 }
464
465 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
466 ResourceMark rm(THREAD);
467 return create_from_str(java_name->as_klass_external_name(), THREAD);
468 }
469
470 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
471 jchar* result = as_unicode_string_or_null(java_string, length);
472 if (result == nullptr) {
473 THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
474 }
475 return result;
476 }
477
478 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
479 typeArrayOop value = java_lang_String::value(java_string);
480 length = java_lang_String::length(java_string, value);
481 bool is_latin1 = java_lang_String::is_latin1(java_string);
482
483 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
484 if (result != nullptr) {
485 if (!is_latin1) {
486 for (int index = 0; index < length; index++) {
487 result[index] = value->char_at(index);
488 }
489 } else {
490 for (int index = 0; index < length; index++) {
491 result[index] = ((jchar) value->byte_at(index)) & 0xff;
492 }
493 }
494 }
495 return result;
496 }
497
498 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
499 // The hash and hashIsZero fields are subject to a benign data race,
500 // making it crucial to ensure that any observable result of the
501 // calculation in this method stays correct under any possible read of
502 // these fields. Necessary restrictions to allow this to be correct
503 // without explicit memory fences or similar concurrency primitives is
504 // that we can ever only write to one of these two fields for a given
505 // String instance, and that the computation is idempotent and derived
506 // from immutable state
507 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
508 if (java_lang_String::hash_is_set(java_string)) {
509 return java_string->int_field(_hash_offset);
510 }
511
512 typeArrayOop value = java_lang_String::value(java_string);
513 int length = java_lang_String::length(java_string, value);
514 bool is_latin1 = java_lang_String::is_latin1(java_string);
515
516 unsigned int hash = 0;
517 if (length > 0) {
518 if (is_latin1) {
519 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
520 } else {
521 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
522 }
523 }
524
525 if (update) {
526 if (hash != 0) {
527 java_string->int_field_put(_hash_offset, hash);
528 } else {
529 java_string->bool_field_put(_hashIsZero_offset, true);
530 }
531 }
532 return hash;
533 }
534
535 unsigned int java_lang_String::hash_code(oop java_string) {
536 return hash_code_impl(java_string, /*update=*/true);
537 }
538
539 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
540 return hash_code_impl(java_string, /*update=*/false);
541 }
542
543
544 char* java_lang_String::as_quoted_ascii(oop java_string) {
545 typeArrayOop value = java_lang_String::value(java_string);
546 int length = java_lang_String::length(java_string, value);
547 bool is_latin1 = java_lang_String::is_latin1(java_string);
548
549 if (length == 0) return nullptr;
550
551 char* result;
552 size_t result_length;
553 if (!is_latin1) {
554 jchar* base = value->char_at_addr(0);
555 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
556 result = NEW_RESOURCE_ARRAY(char, result_length);
557 UNICODE::as_quoted_ascii(base, length, result, result_length);
558 } else {
559 jbyte* base = value->byte_at_addr(0);
560 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
561 result = NEW_RESOURCE_ARRAY(char, result_length);
562 UNICODE::as_quoted_ascii(base, length, result, result_length);
563 }
564 assert(result_length >= (size_t)length + 1, "must not be shorter");
565 assert(result_length == strlen(result) + 1, "must match");
566 return result;
567 }
568
569 Symbol* java_lang_String::as_symbol(oop java_string) {
570 typeArrayOop value = java_lang_String::value(java_string);
571 int length = java_lang_String::length(java_string, value);
572 bool is_latin1 = java_lang_String::is_latin1(java_string);
573 if (!is_latin1) {
574 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
575 Symbol* sym = SymbolTable::new_symbol(base, length);
576 return sym;
577 } else {
578 ResourceMark rm;
579 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
580 size_t utf8_len = static_cast<size_t>(length);
581 const char* base = UNICODE::as_utf8(position, utf8_len);
582 Symbol* sym = SymbolTable::new_symbol(base, checked_cast<int>(utf8_len));
583 return sym;
584 }
585 }
586
587 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
588 typeArrayOop value = java_lang_String::value(java_string);
589 int length = java_lang_String::length(java_string, value);
590 bool is_latin1 = java_lang_String::is_latin1(java_string);
591 if (!is_latin1) {
592 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
593 return SymbolTable::probe_unicode(base, length);
594 } else {
595 ResourceMark rm;
596 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
597 size_t utf8_len = static_cast<size_t>(length);
598 const char* base = UNICODE::as_utf8(position, utf8_len);
599 return SymbolTable::probe(base, checked_cast<int>(utf8_len));
600 }
601 }
602
603 size_t java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
604 assert(value_equals(value, java_lang_String::value(java_string)),
605 "value must be same as java_lang_String::value(java_string)");
606 int length = java_lang_String::length(java_string, value);
607 if (length == 0) {
608 return 0;
609 }
610 if (!java_lang_String::is_latin1(java_string)) {
611 return UNICODE::utf8_length(value->char_at_addr(0), length);
612 } else {
613 return UNICODE::utf8_length(value->byte_at_addr(0), length);
614 }
615 }
616
617 size_t java_lang_String::utf8_length(oop java_string) {
618 typeArrayOop value = java_lang_String::value(java_string);
619 return utf8_length(java_string, value);
620 }
621
622 int java_lang_String::utf8_length_as_int(oop java_string) {
623 typeArrayOop value = java_lang_String::value(java_string);
624 return utf8_length_as_int(java_string, value);
625 }
626
627 int java_lang_String::utf8_length_as_int(oop java_string, typeArrayOop value) {
628 assert(value_equals(value, java_lang_String::value(java_string)),
629 "value must be same as java_lang_String::value(java_string)");
630 int length = java_lang_String::length(java_string, value);
631 if (length == 0) {
632 return 0;
633 }
634 if (!java_lang_String::is_latin1(java_string)) {
635 return UNICODE::utf8_length_as_int(value->char_at_addr(0), length);
636 } else {
637 return UNICODE::utf8_length_as_int(value->byte_at_addr(0), length);
638 }
639 }
640
641 char* java_lang_String::as_utf8_string(oop java_string) {
642 size_t length;
643 return as_utf8_string(java_string, length);
644 }
645
646 char* java_lang_String::as_utf8_string(oop java_string, size_t& length) {
647 typeArrayOop value = java_lang_String::value(java_string);
648 // `length` is used as the incoming number of characters to
649 // convert, and then set as the number of bytes in the UTF8 sequence.
650 length = java_lang_String::length(java_string, value);
651 bool is_latin1 = java_lang_String::is_latin1(java_string);
652 if (!is_latin1) {
653 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
654 return UNICODE::as_utf8(position, length);
655 } else {
656 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
657 return UNICODE::as_utf8(position, length);
658 }
659 }
660
661 // Uses a provided buffer if it's sufficiently large, otherwise allocates
662 // a resource array to fit
663 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& utf8_len) {
664 typeArrayOop value = java_lang_String::value(java_string);
665 int len = java_lang_String::length(java_string, value);
666 bool is_latin1 = java_lang_String::is_latin1(java_string);
667 if (!is_latin1) {
668 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
669 utf8_len = UNICODE::utf8_length(position, len);
670 if (utf8_len >= buflen) {
671 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
672 }
673 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
674 } else {
675 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
676 utf8_len = UNICODE::utf8_length(position, len);
677 if (utf8_len >= buflen) {
678 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
679 }
680 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
681 }
682 }
683
684 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen) {
685 assert(value_equals(value, java_lang_String::value(java_string)),
686 "value must be same as java_lang_String::value(java_string)");
687 int length = java_lang_String::length(java_string, value);
688 bool is_latin1 = java_lang_String::is_latin1(java_string);
689 if (!is_latin1) {
690 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
691 return UNICODE::as_utf8(position, length, buf, buflen);
692 } else {
693 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
694 return UNICODE::as_utf8(position, length, buf, buflen);
695 }
696 }
697
698 char* java_lang_String::as_utf8_string(oop java_string, char* buf, size_t buflen) {
699 typeArrayOop value = java_lang_String::value(java_string);
700 return as_utf8_string(java_string, value, buf, buflen);
701 }
702
703 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
704 // `length` is used as the incoming number of characters to
705 // convert, and then set as the number of bytes in the UTF8 sequence.
706 size_t length = static_cast<size_t>(len);
707 typeArrayOop value = java_lang_String::value(java_string);
708 bool is_latin1 = java_lang_String::is_latin1(java_string);
709 assert(start + len <= java_lang_String::length(java_string), "just checking");
710 if (!is_latin1) {
711 jchar* position = value->char_at_addr(start);
712 return UNICODE::as_utf8(position, length);
713 } else {
714 jbyte* position = value->byte_at_addr(start);
715 return UNICODE::as_utf8(position, length);
716 }
717 }
718
719 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen) {
720 assert(value_equals(value, java_lang_String::value(java_string)),
721 "value must be same as java_lang_String::value(java_string)");
722 assert(start + len <= java_lang_String::length(java_string), "just checking");
723 bool is_latin1 = java_lang_String::is_latin1(java_string);
724 if (!is_latin1) {
725 jchar* position = value->char_at_addr(start);
726 return UNICODE::as_utf8(position, len, buf, buflen);
727 } else {
728 jbyte* position = value->byte_at_addr(start);
729 return UNICODE::as_utf8(position, len, buf, buflen);
730 }
731 }
732
733 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
734 assert(java_string->klass() == vmClasses::String_klass(),
735 "must be java_string");
736 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
737 int length = java_lang_String::length(java_string, value);
738 if (length != len) {
739 return false;
740 }
741 bool is_latin1 = java_lang_String::is_latin1(java_string);
742 if (!is_latin1) {
743 for (int i = 0; i < len; i++) {
744 if (value->char_at(i) != chars[i]) {
745 return false;
746 }
747 }
748 } else {
749 for (int i = 0; i < len; i++) {
750 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
751 return false;
752 }
753 }
754 }
755 return true;
756 }
757
758 bool java_lang_String::equals(oop java_string, const char* utf8_string, size_t utf8_len) {
759 assert(java_string->klass() == vmClasses::String_klass(),
760 "must be java_string");
761 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
762 int length = java_lang_String::length(java_string, value);
763 int unicode_length = UTF8::unicode_length(utf8_string, utf8_len);
764 if (length != unicode_length) {
765 return false;
766 }
767 bool is_latin1 = java_lang_String::is_latin1(java_string);
768 jchar c;
769 if (!is_latin1) {
770 for (int i = 0; i < unicode_length; i++) {
771 utf8_string = UTF8::next(utf8_string, &c);
772 if (value->char_at(i) != c) {
773 return false;
774 }
775 }
776 } else {
777 for (int i = 0; i < unicode_length; i++) {
778 utf8_string = UTF8::next(utf8_string, &c);
779 if ((((jchar) value->byte_at(i)) & 0xff) != c) {
780 return false;
781 }
782 }
783 }
784 return true;
785 }
786
787 bool java_lang_String::equals(oop str1, oop str2) {
788 assert(str1->klass() == vmClasses::String_klass(),
789 "must be java String");
790 assert(str2->klass() == vmClasses::String_klass(),
791 "must be java String");
792 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
793 bool is_latin1 = java_lang_String::is_latin1(str1);
794 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
795 bool is_latin2 = java_lang_String::is_latin1(str2);
796
797 if (is_latin1 != is_latin2) {
798 // Strings with different coders are never equal.
799 return false;
800 }
801 return value_equals(value1, value2);
802 }
803
804 // Print the given string to the given outputStream, limiting the output to
805 // at most max_length of the string's characters. If the length exceeds the
806 // limit we print an abridged version of the string with the "middle" elided
807 // and replaced by " ... (N characters ommitted) ... ". If max_length is odd
808 // it is treated as max_length-1.
809 void java_lang_String::print(oop java_string, outputStream* st, int max_length) {
810 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
811 // We need at least two characters to print A ... B
812 assert(max_length > 1, "invalid max_length: %d", max_length);
813
814 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
815
816 if (value == nullptr) {
817 // This can happen if, e.g., printing a String
818 // object before its initializer has been called
819 st->print("nullptr");
820 return;
821 }
822
823 int length = java_lang_String::length(java_string, value);
824 bool is_latin1 = java_lang_String::is_latin1(java_string);
825
826 bool abridge = length > max_length;
827
828 st->print("\"");
829 for (int index = 0; index < length; index++) {
830 // If we need to abridge and we've printed half the allowed characters
831 // then jump to the tail of the string.
832 if (abridge && index >= max_length / 2) {
833 st->print(" ... (%d characters ommitted) ... ", length - 2 * (max_length / 2));
834 index = length - (max_length / 2);
835 abridge = false; // only do this once
836 }
837 jchar c = (!is_latin1) ? value->char_at(index) :
838 ((jchar) value->byte_at(index)) & 0xff;
839 if (c < ' ') {
840 st->print("\\x%02X", c); // print control characters e.g. \x0A
841 } else {
842 st->print("%c", c);
843 }
844 }
845 st->print("\"");
846
847 if (length > max_length) {
848 st->print(" (abridged) ");
849 }
850 }
851
852 // java_lang_Class
853
854 int java_lang_Class::_klass_offset;
855 int java_lang_Class::_array_klass_offset;
856 int java_lang_Class::_oop_size_offset;
857 int java_lang_Class::_static_oop_field_count_offset;
858 int java_lang_Class::_class_loader_offset;
859 int java_lang_Class::_module_offset;
860 int java_lang_Class::_protection_domain_offset;
861 int java_lang_Class::_component_mirror_offset;
862 int java_lang_Class::_init_lock_offset;
863 int java_lang_Class::_signers_offset;
864 int java_lang_Class::_name_offset;
865 int java_lang_Class::_source_file_offset;
866 int java_lang_Class::_classData_offset;
867 int java_lang_Class::_classRedefinedCount_offset;
868 int java_lang_Class::_reflectionData_offset;
869 int java_lang_Class::_modifiers_offset;
870 int java_lang_Class::_is_primitive_offset;
871 int java_lang_Class::_raw_access_flags_offset;
872
873 bool java_lang_Class::_offsets_computed = false;
874 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
875 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
876
877 #ifdef ASSERT
878 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
879 assert(fd->has_initial_value(), "caller should have checked this");
880 assert(fd->field_type() == T_OBJECT, "caller should have checked this");
881 assert(fd->signature() == vmSymbols::string_signature(), "just checking");
882 }
883 #endif
884
885 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
886 DEBUG_ONLY(assert_valid_static_string_field(fd);)
887 oop string = fd->string_initial_value(CHECK);
888 mirror()->obj_field_put(fd->offset(), string);
889 }
890
891 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
892 assert(fd->has_initial_value(), "caller should have checked this");
893 BasicType t = fd->field_type();
894 switch (t) {
895 case T_BYTE:
896 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value()));
897 break;
898 case T_BOOLEAN:
899 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value()));
900 break;
901 case T_CHAR:
902 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value()));
903 break;
904 case T_SHORT:
905 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value()));
906 break;
907 case T_INT:
908 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
909 break;
910 case T_FLOAT:
911 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
912 break;
913 case T_DOUBLE:
914 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
915 break;
916 case T_LONG:
917 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
918 break;
919 default:
920 // Illegal ConstantValue attribute in class file should have been
921 // caught during classfile parsing.
922 ShouldNotReachHere();
923 }
924 }
925
926 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
927 assert(mirror.not_null() && fd->is_static(), "just checking");
928 if (fd->has_initial_value()) {
929 if (fd->field_type() != T_OBJECT) {
930 initialize_static_primitive_field(fd, mirror);
931 } else {
932 initialize_static_string_field(fd, mirror, CHECK);
933 }
934 }
935 }
936
937 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
938 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
939
940 // If the offset was read from the shared archive, it was fixed up already
941 if (!k->in_aot_cache()) {
942 if (k->is_instance_klass()) {
943 // During bootstrap, java.lang.Class wasn't loaded so static field
944 // offsets were computed without the size added it. Go back and
945 // update all the static field offsets to included the size.
946
947 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
948 // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
949 // static fields offsets are updated in this array before reencoding everything into
950 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
951
952 int java_fields;
953 int injected_fields;
954 InstanceKlass* ik = InstanceKlass::cast(k);
955 GrowableArray<FieldInfo>* fields =
956 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
957 &java_fields, &injected_fields);
958 for (int i = 0; i < fields->length(); i++) {
959 FieldInfo* fi = fields->adr_at(i);
960 if (fi->access_flags().is_static()) {
961 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
962 }
963 }
964 Array<u1>* old_stream = ik->fieldinfo_stream();
965 assert(fields->length() == (java_fields + injected_fields), "Must be");
966 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
967 ik->set_fieldinfo_stream(new_fis);
968 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
969
970 Array<u1>* old_table = ik->fieldinfo_search_table();
971 Array<u1>* search_table = FieldInfoStream::create_search_table(ik->constants(), new_fis, k->class_loader_data(), CHECK);
972 ik->set_fieldinfo_search_table(search_table);
973 MetadataFactory::free_array<u1>(k->class_loader_data(), old_table);
974
975 DEBUG_ONLY(FieldInfoStream::validate_search_table(ik->constants(), new_fis, search_table));
976 }
977 }
978
979 if (k->in_aot_cache() && k->has_archived_mirror_index()) {
980 if (HeapShared::is_archived_heap_in_use()) {
981 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
982 assert(present, "Missing archived mirror for %s", k->external_name());
983 return;
984 } else {
985 k->clear_java_mirror_handle();
986 k->clear_archived_mirror_index();
987 }
988 }
989 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
990 }
991
992 void java_lang_Class::initialize_mirror_fields(InstanceKlass* ik,
993 Handle mirror,
994 Handle protection_domain,
995 Handle classData,
996 TRAPS) {
997 // Allocate a simple java object for a lock.
998 // This needs to be a java object because during class initialization
999 // it can be held across a java call.
1000 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
1001 set_init_lock(mirror(), r);
1002
1003 // Set protection domain also
1004 set_protection_domain(mirror(), protection_domain());
1005
1006 // Initialize static fields
1007 ik->do_local_static_fields(&initialize_static_field, mirror, CHECK);
1008
1009 // Set classData
1010 set_class_data(mirror(), classData());
1011 }
1012
1013 // Set the java.lang.Module module field in the java_lang_Class mirror
1014 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
1015 if (CDSConfig::is_using_aot_linked_classes()) {
1016 oop archived_module = java_lang_Class::module(mirror());
1017 if (archived_module != nullptr) {
1018 precond(module() == nullptr || module() == archived_module);
1019 precond(AOTMetaspace::in_aot_cache_static_region((void*)k));
1020 return;
1021 }
1022 }
1023
1024 if (module.is_null()) {
1025 // During startup, the module may be null only if java.base has not been defined yet.
1026 // Put the class on the fixup_module_list to patch later when the java.lang.Module
1027 // for java.base is known. But note that since we captured the null module another
1028 // thread may have completed that initialization.
1029
1030 // With AOT-linked classes, java.base should have been defined before the
1031 // VM loads any classes.
1032 precond(!CDSConfig::is_using_aot_linked_classes());
1033
1034 bool javabase_was_defined = false;
1035 {
1036 MutexLocker m1(current, Module_lock);
1037 // Keep list of classes needing java.base module fixup
1038 if (!ModuleEntryTable::javabase_defined()) {
1039 assert(k->java_mirror() != nullptr, "Class's mirror is null");
1040 k->class_loader_data()->inc_keep_alive_ref_count();
1041 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
1042 fixup_module_field_list()->push(k);
1043 } else {
1044 javabase_was_defined = true;
1045 }
1046 }
1047
1048 // If java.base was already defined then patch this particular class with java.base.
1049 if (javabase_was_defined) {
1050 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
1051 assert(javabase_entry != nullptr && javabase_entry->module_oop() != nullptr,
1052 "Setting class module field, " JAVA_BASE_NAME " should be defined");
1053 Handle javabase_handle(current, javabase_entry->module_oop());
1054 set_module(mirror(), javabase_handle());
1055 }
1056 } else {
1057 assert(Universe::is_module_initialized() ||
1058 (ModuleEntryTable::javabase_defined() &&
1059 (module() == ModuleEntryTable::javabase_moduleEntry()->module_oop())),
1060 "Incorrect java.lang.Module specification while creating mirror");
1061 set_module(mirror(), module());
1062 }
1063 }
1064
1065 // Statically allocate fixup lists because they always get created.
1066 void java_lang_Class::allocate_fixup_lists() {
1067 if (!CDSConfig::is_using_aot_linked_classes()) {
1068 // fixup_mirror_list() is not used when we have preloaded classes. See
1069 // Universe::fixup_mirrors().
1070 GrowableArray<Klass*>* mirror_list =
1071 new (mtClass) GrowableArray<Klass*>(40, mtClass);
1072 set_fixup_mirror_list(mirror_list);
1073
1074 // With AOT-linked classes, java.base module is defined before any class
1075 // is loaded, so there's no need for fixup_module_field_list().
1076 GrowableArray<Klass*>* module_list =
1077 new (mtModule) GrowableArray<Klass*>(500, mtModule);
1078 set_fixup_module_field_list(module_list);
1079 }
1080 }
1081
1082 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
1083 Handle& mirror, Handle& comp_mirror, TRAPS) {
1084 // Allocate mirror (java.lang.Class instance)
1085 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
1086 mirror = Handle(THREAD, mirror_oop);
1087
1088 // Setup indirection from mirror->klass
1089 set_klass(mirror(), k);
1090
1091 // Set the modifiers flag.
1092 u2 computed_modifiers = k->compute_modifier_flags();
1093 set_modifiers(mirror(), computed_modifiers);
1094
1095 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
1096 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
1097
1098 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
1099
1100 // It might also have a component mirror. This mirror must already exist.
1101 if (k->is_array_klass()) {
1102 assert(!k->is_refined_objArray_klass(), "Should not be called with the refined array klasses");
1103
1104 // The Java code for array classes gets the access flags from the element type.
1105 set_raw_access_flags(mirror(), 0);
1106 if (k->is_typeArray_klass()) {
1107 BasicType type = TypeArrayKlass::cast(k)->element_type();
1108 if (is_scratch) {
1109 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
1110 } else {
1111 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
1112 }
1113 } else {
1114 assert(k->is_unrefined_objArray_klass(), "Must be");
1115 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1116 assert(element_klass != nullptr, "Must have an element klass");
1117 if (is_scratch) {
1118 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1119 } else {
1120 comp_mirror = Handle(THREAD, element_klass->java_mirror());
1121 }
1122 }
1123 assert(comp_mirror() != nullptr, "must have a mirror");
1124
1125 // Two-way link between the array klass and its component mirror:
1126 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1127 set_component_mirror(mirror(), comp_mirror());
1128 // See below for ordering dependencies between field array_klass in component mirror
1129 // and java_mirror in this klass.
1130 } else {
1131 assert(k->is_instance_klass(), "Must be");
1132 // Set the raw access_flags, this is used by reflection instead of modifier flags.
1133 set_raw_access_flags(mirror(), InstanceKlass::cast(k)->access_flags().as_unsigned_short());
1134 initialize_mirror_fields(InstanceKlass::cast(k), mirror, protection_domain, classData, THREAD);
1135 if (HAS_PENDING_EXCEPTION) {
1136 // If any of the fields throws an exception like OOM remove the klass field
1137 // from the mirror so GC doesn't follow it after the klass has been deallocated.
1138 // This mirror looks like a primitive type, which logically it is because it
1139 // it represents no class.
1140 set_klass(mirror(), nullptr);
1141 return;
1142 }
1143 }
1144 }
1145
1146 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1147 Handle module, Handle protection_domain,
1148 Handle classData, TRAPS) {
1149 assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1150 assert(k->java_mirror() == nullptr, "should only assign mirror once");
1151 // Class_klass has to be loaded because it is used to allocate
1152 // the mirror.
1153 if (vmClasses::Class_klass_is_loaded()) {
1154
1155 if (k->is_refined_objArray_klass()) {
1156 Klass* super_klass = k->super();
1157 assert(super_klass != nullptr, "Must be");
1158 Handle mirror(THREAD, super_klass->java_mirror());
1159 k->set_java_mirror(mirror);
1160 return;
1161 }
1162
1163 Handle mirror;
1164 Handle comp_mirror;
1165
1166 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1167
1168 // set the classLoader field in the java_lang_Class instance
1169 assert(class_loader() == k->class_loader(), "should be same");
1170 set_class_loader(mirror(), class_loader());
1171
1172 // Setup indirection from klass->mirror
1173 // after any exceptions can happen during allocations.
1174 k->set_java_mirror(mirror);
1175
1176 // Set the module field in the java_lang_Class instance. This must be done
1177 // after the mirror is set.
1178 set_mirror_module_field(THREAD, k, mirror, module);
1179
1180 if (comp_mirror() != nullptr) {
1181 // Set after k->java_mirror() is published, because compiled code running
1182 // concurrently doesn't expect a k to have a null java_mirror.
1183 release_set_array_klass(comp_mirror(), k);
1184 }
1185
1186 if (CDSConfig::is_dumping_heap()) {
1187 create_scratch_mirror(k, CHECK);
1188 }
1189 } else {
1190 assert(!CDSConfig::is_using_aot_linked_classes(), "should not come here");
1191 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1192 fixup_mirror_list()->push(k);
1193 }
1194 }
1195
1196 #if INCLUDE_CDS_JAVA_HEAP
1197 // The "scratch mirror" stores the states of the mirror object that can be
1198 // decided at dump time (such as the initial values of the static fields, the
1199 // component mirror, etc). At runtime, more information is added to it by
1200 // java_lang_Class::restore_archived_mirror().
1201 //
1202 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1203 // produces the same result as /*runtime*/create_mirror().
1204 //
1205 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1206 // latter may contain dumptime-specific information that cannot be archived
1207 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1208 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1209 if (k->class_loader() != nullptr &&
1210 k->class_loader() != SystemDictionary::java_platform_loader() &&
1211 k->class_loader() != SystemDictionary::java_system_loader()) {
1212 // We only archive the mirrors of classes loaded by the built-in loaders
1213 return;
1214 }
1215
1216 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1217 Handle mirror;
1218 Handle comp_mirror;
1219 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1220
1221 if (comp_mirror() != nullptr) {
1222 release_set_array_klass(comp_mirror(), k);
1223 }
1224
1225 HeapShared::set_scratch_java_mirror(k, mirror());
1226 }
1227
1228 // Returns true if the mirror is updated, false if no archived mirror
1229 // data is present. After the archived mirror object is restored, the
1230 // shared klass' _has_raw_archived_mirror flag is cleared.
1231 bool java_lang_Class::restore_archived_mirror(Klass *k,
1232 Handle class_loader, Handle module,
1233 Handle protection_domain, TRAPS) {
1234 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1235 // see more details in vmClasses::resolve_all().
1236 if (!vmClasses::Class_klass_is_loaded() && !CDSConfig::is_using_aot_linked_classes()) {
1237 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1238 fixup_mirror_list()->push(k);
1239 return true;
1240 }
1241
1242 oop m = k->archived_java_mirror();
1243 assert(m != nullptr, "must have stored non-null archived mirror");
1244
1245 // Sanity: clear it now to prevent re-initialization if any of the following fails
1246 k->clear_archived_mirror_index();
1247
1248 // mirror is archived, restore
1249 log_debug(aot, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1250 Handle mirror(THREAD, m);
1251
1252 if (!k->is_array_klass()) {
1253 assert(as_Klass(m) == k, "must be");
1254 // - local static final fields with initial values were initialized at dump time
1255 assert(init_lock(mirror()) != nullptr, "allocated during AOT assembly");
1256
1257 if (protection_domain.not_null()) {
1258 set_protection_domain(mirror(), protection_domain());
1259 }
1260 } else if (k->is_objArray_klass()) {
1261 ObjArrayKlass* objarray_k = (ObjArrayKlass*)as_Klass(m);
1262 // Mirror should be restored for an ObjArrayKlass or one of its refined array klasses
1263 assert(objarray_k == k || objarray_k->find_refined_array_klass((ObjArrayKlass*)k), "must be");
1264 }
1265
1266 assert(class_loader() == k->class_loader(), "should be same");
1267 if (class_loader.not_null()) {
1268 set_class_loader(mirror(), class_loader());
1269 }
1270
1271 k->set_java_mirror(mirror);
1272
1273 set_mirror_module_field(THREAD, k, mirror, module);
1274
1275 if (log_is_enabled(Trace, aot, heap, mirror)) {
1276 ResourceMark rm(THREAD);
1277 log_trace(aot, heap, mirror)(
1278 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1279 }
1280
1281 if (CDSConfig::is_dumping_heap() && (!k->is_refined_objArray_klass())) {
1282 create_scratch_mirror(k, CHECK_(false));
1283 }
1284
1285 return true;
1286 }
1287 #endif // INCLUDE_CDS_JAVA_HEAP
1288
1289 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1290 assert(_module_offset != 0, "must have been computed already");
1291 set_module(k->java_mirror(), module());
1292 }
1293
1294 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1295 assert(_oop_size_offset != 0, "must be set");
1296 assert(size > 0, "Oop size must be greater than zero, not %zu", size);
1297 assert(size <= INT_MAX, "Lossy conversion: %zu", size);
1298 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1299 }
1300
1301 int java_lang_Class::static_oop_field_count(oop java_class) {
1302 assert(_static_oop_field_count_offset != 0, "must be set");
1303 return java_class->int_field(_static_oop_field_count_offset);
1304 }
1305
1306 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1307 assert(_static_oop_field_count_offset != 0, "must be set");
1308 java_class->int_field_put(_static_oop_field_count_offset, size);
1309 }
1310
1311 oop java_lang_Class::protection_domain(oop java_class) {
1312 assert(_protection_domain_offset != 0, "must be set");
1313 return java_class->obj_field(_protection_domain_offset);
1314 }
1315 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1316 assert(_protection_domain_offset != 0, "must be set");
1317 java_class->obj_field_put(_protection_domain_offset, pd);
1318 }
1319
1320 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1321 assert(_component_mirror_offset != 0, "must be set");
1322 assert(java_lang_Class::as_Klass(java_class) != nullptr &&
1323 java_lang_Class::as_Klass(java_class)->is_array_klass(), "must be");
1324 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1325 }
1326
1327 oop java_lang_Class::component_mirror(oop java_class) {
1328 assert(_component_mirror_offset != 0, "must be set");
1329 return java_class->obj_field(_component_mirror_offset);
1330 }
1331
1332 oop java_lang_Class::init_lock(oop java_class) {
1333 assert(_init_lock_offset != 0, "must be set");
1334 return java_class->obj_field(_init_lock_offset);
1335 }
1336 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1337 assert(_init_lock_offset != 0, "must be set");
1338 java_class->obj_field_put(_init_lock_offset, init_lock);
1339 }
1340
1341 objArrayOop java_lang_Class::signers(oop java_class) {
1342 assert(_signers_offset != 0, "must be set");
1343 return (objArrayOop)java_class->obj_field(_signers_offset);
1344 }
1345
1346 oop java_lang_Class::class_data(oop java_class) {
1347 assert(_classData_offset != 0, "must be set");
1348 return java_class->obj_field(_classData_offset);
1349 }
1350 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1351 assert(_classData_offset != 0, "must be set");
1352 java_class->obj_field_put(_classData_offset, class_data);
1353 }
1354
1355 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1356 assert(_class_loader_offset != 0, "offsets should have been initialized");
1357 java_class->obj_field_put(_class_loader_offset, loader);
1358 }
1359
1360 oop java_lang_Class::class_loader(oop java_class) {
1361 assert(_class_loader_offset != 0, "must be set");
1362 return java_class->obj_field(_class_loader_offset);
1363 }
1364
1365 oop java_lang_Class::module(oop java_class) {
1366 assert(_module_offset != 0, "must be set");
1367 return java_class->obj_field(_module_offset);
1368 }
1369
1370 void java_lang_Class::set_module(oop java_class, oop module) {
1371 assert(_module_offset != 0, "must be set");
1372 java_class->obj_field_put(_module_offset, module);
1373 }
1374
1375 oop java_lang_Class::name(Handle java_class, TRAPS) {
1376 assert(_name_offset != 0, "must be set");
1377 oop o = java_class->obj_field(_name_offset);
1378 if (o == nullptr) {
1379 o = StringTable::intern(as_external_name(java_class()), THREAD);
1380 java_class->obj_field_put(_name_offset, o);
1381 }
1382 return o;
1383 }
1384
1385 oop java_lang_Class::source_file(oop java_class) {
1386 assert(_source_file_offset != 0, "must be set");
1387 return java_class->obj_field(_source_file_offset);
1388 }
1389
1390 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1391 assert(_source_file_offset != 0, "must be set");
1392 java_class->obj_field_put(_source_file_offset, source_file);
1393 }
1394
1395 void java_lang_Class::set_is_primitive(oop java_class) {
1396 assert(_is_primitive_offset != 0, "must be set");
1397 java_class->bool_field_put(_is_primitive_offset, true);
1398 }
1399
1400 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1401 // Mirrors for basic types have a null klass field, which makes them special.
1402 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1403 if (type != T_VOID) {
1404 Klass* aklass = Universe::typeArrayKlass(type);
1405 assert(aklass != nullptr, "correct bootstrap");
1406 release_set_array_klass(java_class, aklass);
1407 }
1408 #ifdef ASSERT
1409 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1410 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1411 #endif
1412 set_modifiers(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
1413 set_raw_access_flags(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
1414
1415 set_is_primitive(java_class);
1416 return java_class;
1417 }
1418
1419 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1420 assert(is_instance(java_class), "must be a Class object");
1421 java_class->metadata_field_put(_klass_offset, klass);
1422 }
1423
1424
1425 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1426 assert(is_instance(java_class), "must be a Class object");
1427 Symbol* name = nullptr;
1428 bool is_instance = false;
1429 if (is_primitive(java_class)) {
1430 name = vmSymbols::type_signature(primitive_type(java_class));
1431 } else {
1432 Klass* k = as_Klass(java_class);
1433 is_instance = k->is_instance_klass();
1434 name = k->name();
1435 }
1436 if (name == nullptr) {
1437 st->print("<null>");
1438 return;
1439 }
1440 if (is_instance) st->print("L");
1441 st->write((char*) name->base(), (int) name->utf8_length());
1442 if (is_instance) st->print(";");
1443 }
1444
1445 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1446 assert(is_instance(java_class), "must be a Class object");
1447 Symbol* name;
1448 if (is_primitive(java_class)) {
1449 name = vmSymbols::type_signature(primitive_type(java_class));
1450 // Because this can create a new symbol, the caller has to decrement
1451 // the refcount, so make adjustment here and below for symbols returned
1452 // that are not created or incremented due to a successful lookup.
1453 name->increment_refcount();
1454 } else {
1455 Klass* k = as_Klass(java_class);
1456 if (!k->is_instance_klass()) {
1457 name = k->name();
1458 name->increment_refcount();
1459 } else {
1460 ResourceMark rm;
1461 const char* sigstr = k->signature_name();
1462 int siglen = (int) strlen(sigstr);
1463 if (!intern_if_not_found) {
1464 name = SymbolTable::probe(sigstr, siglen);
1465 } else {
1466 name = SymbolTable::new_symbol(sigstr, siglen);
1467 }
1468 }
1469 }
1470 return name;
1471 }
1472
1473 // Returns the Java name for this Java mirror (Resource allocated)
1474 // See Klass::external_name().
1475 // For primitive type Java mirrors, its type name is returned.
1476 const char* java_lang_Class::as_external_name(oop java_class) {
1477 assert(is_instance(java_class), "must be a Class object");
1478 const char* name = nullptr;
1479 if (is_primitive(java_class)) {
1480 name = type2name(primitive_type(java_class));
1481 } else {
1482 name = as_Klass(java_class)->external_name();
1483 }
1484 if (name == nullptr) {
1485 name = "<null>";
1486 }
1487 return name;
1488 }
1489
1490 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1491 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1492 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass");
1493 return k;
1494 }
1495
1496 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1497 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1498 assert(!klass->is_refined_objArray_klass(), "should not be ref or flat array klass");
1499 java_class->release_metadata_field_put(_array_klass_offset, klass);
1500 }
1501
1502
1503 BasicType java_lang_Class::primitive_type(oop java_class) {
1504 assert(is_primitive(java_class), "just checking");
1505 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1506 BasicType type = T_VOID;
1507 if (ak != nullptr) {
1508 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1509 type = ArrayKlass::cast(ak)->element_type();
1510 } else {
1511 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1512 }
1513 #ifdef ASSERT
1514 if (CDSConfig::is_dumping_heap()) {
1515 oop mirror = Universe::java_mirror(type);
1516 oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1517 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1518 } else {
1519 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1520 }
1521 #endif
1522 return type;
1523 }
1524
1525 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1526 assert(is_instance(java_class), "must be a Class object");
1527 if (is_primitive(java_class)) {
1528 if (reference_klass != nullptr)
1529 (*reference_klass) = nullptr;
1530 return primitive_type(java_class);
1531 } else {
1532 if (reference_klass != nullptr)
1533 (*reference_klass) = as_Klass(java_class);
1534 return T_OBJECT;
1535 }
1536 }
1537
1538
1539 oop java_lang_Class::primitive_mirror(BasicType t) {
1540 oop mirror = Universe::java_mirror(t);
1541 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1542 assert(is_primitive(mirror), "must be primitive");
1543 return mirror;
1544 }
1545
1546 #define CLASS_FIELDS_DO(macro) \
1547 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1548 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1549 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1550 macro(_module_offset, k, "module", module_signature, false); \
1551 macro(_name_offset, k, "name", string_signature, false); \
1552 macro(_classData_offset, k, "classData", object_signature, false); \
1553 macro(_reflectionData_offset, k, "reflectionData", java_lang_ref_SoftReference_signature, false); \
1554 macro(_signers_offset, k, "signers", object_array_signature, false); \
1555 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), char_signature, false); \
1556 macro(_raw_access_flags_offset, k, "classFileAccessFlags", char_signature, false); \
1557 macro(_protection_domain_offset, k, "protectionDomain", java_security_ProtectionDomain_signature, false); \
1558 macro(_is_primitive_offset, k, "primitive", bool_signature, false);
1559
1560 void java_lang_Class::compute_offsets() {
1561 if (_offsets_computed) {
1562 return;
1563 }
1564
1565 _offsets_computed = true;
1566
1567 InstanceKlass* k = vmClasses::Class_klass();
1568 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1569 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1570 }
1571
1572 #if INCLUDE_CDS
1573 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1574 f->do_bool(&_offsets_computed);
1575
1576 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1577
1578 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1579 }
1580 #endif
1581
1582 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1583 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1584 return the_class_mirror->int_field(_classRedefinedCount_offset);
1585 }
1586
1587 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1588 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1589 the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1590 }
1591
1592 int java_lang_Class::modifiers(oop the_class_mirror) {
1593 assert(_modifiers_offset != 0, "offsets should have been initialized");
1594 return the_class_mirror->char_field(_modifiers_offset);
1595 }
1596
1597 void java_lang_Class::set_modifiers(oop the_class_mirror, u2 value) {
1598 assert(_modifiers_offset != 0, "offsets should have been initialized");
1599 the_class_mirror->char_field_put(_modifiers_offset, value);
1600 }
1601
1602 void java_lang_Class::set_raw_access_flags(oop the_class_mirror, u2 value) {
1603 assert(_raw_access_flags_offset != 0, "offsets should have been initialized");
1604 the_class_mirror->char_field_put(_raw_access_flags_offset, value);
1605 }
1606
1607
1608 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1609 // platform thread structure, and a eetop offset which was used for thread
1610 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1611 // merged, so in the HotSpot VM we just use the eetop field for the thread
1612 // instead of the privateInfo_offset.
1613 //
1614 // Note: The stackSize field is only present starting in 1.4.
1615
1616 int java_lang_Thread_FieldHolder::_group_offset;
1617 int java_lang_Thread_FieldHolder::_priority_offset;
1618 int java_lang_Thread_FieldHolder::_stackSize_offset;
1619 int java_lang_Thread_FieldHolder::_daemon_offset;
1620 int java_lang_Thread_FieldHolder::_thread_status_offset;
1621
1622 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1623 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1624 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1625 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1626 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1627 macro(_thread_status_offset, k, "threadStatus", int_signature, false)
1628
1629 void java_lang_Thread_FieldHolder::compute_offsets() {
1630 assert(_group_offset == 0, "offsets should be initialized only once");
1631
1632 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1633 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1634 }
1635
1636 #if INCLUDE_CDS
1637 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1638 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1639 }
1640 #endif
1641
1642 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1643 return holder->obj_field(_group_offset);
1644 }
1645
1646 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1647 return (ThreadPriority)holder->int_field(_priority_offset);
1648 }
1649
1650 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1651 holder->int_field_put(_priority_offset, priority);
1652 }
1653
1654 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1655 return holder->long_field(_stackSize_offset);
1656 }
1657
1658 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1659 return holder->bool_field(_daemon_offset) != 0;
1660 }
1661
1662 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1663 assert(val, "daemon status is never turned off");
1664 holder->bool_field_put(_daemon_offset, val);
1665 }
1666
1667 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1668 holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1669 }
1670
1671 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1672 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1673 }
1674
1675
1676 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1677
1678 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1679 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true);
1680
1681 void java_lang_Thread_Constants::compute_offsets() {
1682 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1683
1684 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1685 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1686 }
1687
1688 #if INCLUDE_CDS
1689 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1690 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1691 }
1692 #endif
1693
1694 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1695 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1696 oop base = k->static_field_base_raw();
1697 return base->obj_field(_static_VTHREAD_GROUP_offset);
1698 }
1699
1700
1701 int java_lang_Thread::_holder_offset;
1702 int java_lang_Thread::_name_offset;
1703 int java_lang_Thread::_contextClassLoader_offset;
1704 int java_lang_Thread::_eetop_offset;
1705 int java_lang_Thread::_jvmti_thread_state_offset;
1706 int java_lang_Thread::_vthread_transition_disable_count_offset;
1707 int java_lang_Thread::_is_in_vthread_transition_offset;
1708 int java_lang_Thread::_interrupted_offset;
1709 int java_lang_Thread::_interruptLock_offset;
1710 int java_lang_Thread::_tid_offset;
1711 int java_lang_Thread::_continuation_offset;
1712 int java_lang_Thread::_park_blocker_offset;
1713 int java_lang_Thread::_scopedValueBindings_offset;
1714 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1715
1716 #define THREAD_FIELDS_DO(macro) \
1717 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \
1718 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1719 macro(_contextClassLoader_offset, k, "contextClassLoader", classloader_signature, false); \
1720 macro(_eetop_offset, k, "eetop", long_signature, false); \
1721 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1722 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \
1723 macro(_tid_offset, k, "tid", long_signature, false); \
1724 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1725 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1726 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1727
1728 void java_lang_Thread::compute_offsets() {
1729 assert(_holder_offset == 0, "offsets should be initialized only once");
1730
1731 InstanceKlass* k = vmClasses::Thread_klass();
1732 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1733 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1734 }
1735
1736 #if INCLUDE_CDS
1737 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1738 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1739 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1740 }
1741 #endif
1742
1743 JavaThread* java_lang_Thread::thread(oop java_thread) {
1744 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1745 }
1746
1747 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1748 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1749 }
1750
1751 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1752 java_thread->address_field_put(_eetop_offset, (address)thread);
1753 }
1754
1755 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1756 java_thread->release_address_field_put(_eetop_offset, (address)thread);
1757 }
1758
1759 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1760 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1761 }
1762
1763 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1764 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1765 }
1766
1767 int java_lang_Thread::vthread_transition_disable_count(oop java_thread) {
1768 jint* addr = java_thread->field_addr<jint>(_vthread_transition_disable_count_offset);
1769 return AtomicAccess::load(addr);
1770 }
1771
1772 void java_lang_Thread::inc_vthread_transition_disable_count(oop java_thread) {
1773 assert(VThreadTransition_lock->owned_by_self(), "Must be locked");
1774 jint* addr = java_thread->field_addr<jint>(_vthread_transition_disable_count_offset);
1775 int val = AtomicAccess::load(addr);
1776 AtomicAccess::store(addr, val + 1);
1777 }
1778
1779 void java_lang_Thread::dec_vthread_transition_disable_count(oop java_thread) {
1780 assert(VThreadTransition_lock->owned_by_self(), "Must be locked");
1781 jint* addr = java_thread->field_addr<jint>(_vthread_transition_disable_count_offset);
1782 int val = AtomicAccess::load(addr);
1783 AtomicAccess::store(addr, val - 1);
1784 }
1785
1786 bool java_lang_Thread::is_in_vthread_transition(oop java_thread) {
1787 jboolean* addr = java_thread->field_addr<jboolean>(_is_in_vthread_transition_offset);
1788 return AtomicAccess::load(addr);
1789 }
1790
1791 void java_lang_Thread::set_is_in_vthread_transition(oop java_thread, bool val) {
1792 assert(is_in_vthread_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside");
1793 jboolean* addr = java_thread->field_addr<jboolean>(_is_in_vthread_transition_offset);
1794 AtomicAccess::store(addr, (jboolean)val);
1795 }
1796
1797 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1798 assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1799 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1800 }
1801
1802 oop java_lang_Thread::holder(oop java_thread) {
1803 // Note: may return null if the thread is still attaching
1804 return java_thread->obj_field(_holder_offset);
1805 }
1806 oop java_lang_Thread::interrupt_lock(oop java_thread) {
1807 return java_thread->obj_field(_interruptLock_offset);
1808 }
1809
1810 bool java_lang_Thread::interrupted(oop java_thread) {
1811 // Make sure the caller can safely access oops.
1812 assert(Thread::current()->is_VM_thread() ||
1813 (JavaThread::current()->thread_state() != _thread_blocked &&
1814 JavaThread::current()->thread_state() != _thread_in_native),
1815 "Unsafe access to oop");
1816 return java_thread->bool_field_volatile(_interrupted_offset);
1817 }
1818
1819 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1820 // Make sure the caller can safely access oops.
1821 assert(Thread::current()->is_VM_thread() ||
1822 (JavaThread::current()->thread_state() != _thread_blocked &&
1823 JavaThread::current()->thread_state() != _thread_in_native),
1824 "Unsafe access to oop");
1825 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1826 }
1827
1828
1829 oop java_lang_Thread::name(oop java_thread) {
1830 return java_thread->obj_field(_name_offset);
1831 }
1832
1833
1834 void java_lang_Thread::set_name(oop java_thread, oop name) {
1835 java_thread->obj_field_put(_name_offset, name);
1836 }
1837
1838 // Convenience macros for setting and getting Thread fields that
1839 // are actually stored in the FieldHolder object of the thread.
1840 // The FieldHolder can be null whilst a thread is attaching via
1841 // JNI, and when the main thread is attaching.
1842
1843 // The default value should be the default/zero initialized value
1844 // of the field as it would be in java.lang.Thread.FieldHolder.
1845 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \
1846 { \
1847 oop holder = java_lang_Thread::holder(java_thread); \
1848 if (holder != nullptr) \
1849 return java_lang_Thread_FieldHolder::field(holder); \
1850 else \
1851 return default_val; \
1852 }
1853
1854 // We should never be trying to set a field of an attaching thread.
1855 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \
1856 { \
1857 oop holder = java_lang_Thread::holder(java_thread); \
1858 assert(holder != nullptr, "Thread not fully initialized"); \
1859 java_lang_Thread_FieldHolder::set_##field(holder, value); \
1860 }
1861
1862
1863 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1864 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1865 }
1866
1867
1868 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1869 SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1870 }
1871
1872
1873 oop java_lang_Thread::threadGroup(oop java_thread) {
1874 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1875 }
1876
1877
1878 bool java_lang_Thread::is_alive(oop java_thread) {
1879 JavaThread* thr = java_lang_Thread::thread(java_thread);
1880 return (thr != nullptr);
1881 }
1882
1883
1884 bool java_lang_Thread::is_daemon(oop java_thread) {
1885 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1886 }
1887
1888
1889 void java_lang_Thread::set_daemon(oop java_thread) {
1890 SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1891 }
1892
1893 oop java_lang_Thread::context_class_loader(oop java_thread) {
1894 return java_thread->obj_field(_contextClassLoader_offset);
1895 }
1896
1897
1898 jlong java_lang_Thread::stackSize(oop java_thread) {
1899 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1900 }
1901
1902 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1903 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1904 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1905 }
1906
1907 // Read thread status value from threadStatus field in java.lang.Thread java class.
1908 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1909 // Make sure the caller is operating on behalf of the VM or is
1910 // running VM code (state == _thread_in_vm).
1911 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1912 JavaThread::current()->thread_state() == _thread_in_vm ||
1913 JavaThread::current() == java_lang_Thread::thread(java_thread),
1914 "unsafe call to java_lang_Thread::get_thread_status()?");
1915 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1916 }
1917
1918 ByteSize java_lang_Thread::thread_id_offset() {
1919 return in_ByteSize(_tid_offset);
1920 }
1921
1922 oop java_lang_Thread::park_blocker(oop java_thread) {
1923 return java_thread->obj_field_access<MO_RELAXED>(_park_blocker_offset);
1924 }
1925
1926 // Obtain stack trace for a platform or virtual thread.
1927 oop java_lang_Thread::async_get_stack_trace(jobject jthread, TRAPS) {
1928 ThreadsListHandle tlh(THREAD);
1929 JavaThread* java_thread = nullptr;
1930 oop thread_oop = nullptr;
1931
1932 bool has_java_thread = tlh.cv_internal_thread_to_JavaThread(jthread, &java_thread, &thread_oop);
1933 assert(thread_oop != nullptr, "Missing Thread oop");
1934 bool is_virtual = java_lang_VirtualThread::is_instance(thread_oop);
1935 if (!has_java_thread && !is_virtual) {
1936 return nullptr;
1937 }
1938
1939 class GetStackTraceHandshakeClosure : public HandshakeClosure {
1940 public:
1941 const Handle _thread_h;
1942 int _depth;
1943 enum InitLength { len = 64 }; // Minimum length that covers most cases
1944 GrowableArrayCHeap<Method*, mtInternal> _methods;
1945 GrowableArrayCHeap<int, mtInternal> _bcis;
1946
1947 GetStackTraceHandshakeClosure(Handle thread_h) :
1948 HandshakeClosure("GetStackTraceHandshakeClosure"), _thread_h(thread_h), _depth(0),
1949 _methods(InitLength::len), _bcis(InitLength::len) {
1950 }
1951
1952 void do_thread(Thread* th) {
1953 JavaThread* java_thread = th != nullptr ? JavaThread::cast(th) : nullptr;
1954 if (java_thread != nullptr && !java_thread->has_last_Java_frame()) {
1955 // stack trace is empty
1956 return;
1957 }
1958
1959 bool is_virtual = java_lang_VirtualThread::is_instance(_thread_h());
1960 bool vthread_carrier = !is_virtual && (java_thread->vthread_continuation() != nullptr);
1961
1962 const int max_depth = MaxJavaStackTraceDepth;
1963 const bool skip_hidden = !ShowHiddenFrames;
1964
1965 int total_count = 0;
1966 vframeStream vfst(java_thread != nullptr
1967 ? vframeStream(java_thread, false, false, vthread_carrier) // we don't process frames as we don't care about oops
1968 : vframeStream(java_lang_VirtualThread::continuation(_thread_h())));
1969 for (;
1970 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
1971 vfst.next()) {
1972
1973 if (skip_hidden && (vfst.method()->is_hidden() ||
1974 vfst.method()->is_continuation_enter_intrinsic())) {
1975 continue;
1976 }
1977
1978 _methods.push(vfst.method());
1979 _bcis.push(vfst.bci());
1980 total_count++;
1981 }
1982
1983 _depth = total_count;
1984 }
1985 };
1986
1987 // Handshake with target
1988 ResourceMark rm(THREAD);
1989 HandleMark hm(THREAD);
1990 GetStackTraceHandshakeClosure gsthc(Handle(THREAD, thread_oop));
1991 if (is_virtual) {
1992 Handshake::execute(&gsthc, thread_oop);
1993 } else {
1994 Handshake::execute(&gsthc, &tlh, java_thread);
1995 }
1996
1997 // Stop if no stack trace is found.
1998 if (gsthc._depth == 0) {
1999 return nullptr;
2000 }
2001
2002 // Convert to StackTraceElement array
2003 InstanceKlass* k = vmClasses::StackTraceElement_klass();
2004 assert(k != nullptr, "must be loaded in 1.4+");
2005 if (k->should_be_initialized()) {
2006 k->initialize(CHECK_NULL);
2007 }
2008 refArrayHandle trace = oopFactory::new_refArray_handle(k, gsthc._depth, CHECK_NULL);
2009
2010 for (int i = 0; i < gsthc._depth; i++) {
2011 methodHandle method(THREAD, gsthc._methods.at(i));
2012 oop element = java_lang_StackTraceElement::create(method,
2013 gsthc._bcis.at(i),
2014 CHECK_NULL);
2015 trace->obj_at_put(i, element);
2016 }
2017
2018 return trace();
2019 }
2020
2021 const char* java_lang_Thread::thread_status_name(oop java_thread) {
2022 JavaThreadStatus status = get_thread_status(java_thread);
2023 switch (status) {
2024 case JavaThreadStatus::NEW : return "NEW";
2025 case JavaThreadStatus::RUNNABLE : return "RUNNABLE";
2026 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)";
2027 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)";
2028 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
2029 case JavaThreadStatus::PARKED : return "WAITING (parking)";
2030 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)";
2031 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
2032 case JavaThreadStatus::TERMINATED : return "TERMINATED";
2033 default : return "UNKNOWN";
2034 };
2035 }
2036 int java_lang_ThreadGroup::_parent_offset;
2037 int java_lang_ThreadGroup::_name_offset;
2038 int java_lang_ThreadGroup::_maxPriority_offset;
2039 int java_lang_ThreadGroup::_daemon_offset;
2040
2041 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
2042 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2043 return java_thread_group->obj_field(_parent_offset);
2044 }
2045
2046 // ("name as oop" accessor is not necessary)
2047
2048 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
2049 oop name = java_thread_group->obj_field(_name_offset);
2050 // ThreadGroup.name can be null
2051 if (name != nullptr) {
2052 return java_lang_String::as_utf8_string(name);
2053 }
2054 return nullptr;
2055 }
2056
2057 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
2058 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2059 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
2060 }
2061
2062 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
2063 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2064 return java_thread_group->bool_field(_daemon_offset) != 0;
2065 }
2066
2067 #define THREADGROUP_FIELDS_DO(macro) \
2068 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
2069 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
2070 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
2071 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false);
2072
2073 void java_lang_ThreadGroup::compute_offsets() {
2074 assert(_parent_offset == 0, "offsets should be initialized only once");
2075
2076 InstanceKlass* k = vmClasses::ThreadGroup_klass();
2077 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2078 }
2079
2080 #if INCLUDE_CDS
2081 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
2082 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2083 }
2084 #endif
2085
2086
2087 // java_lang_VirtualThread
2088
2089 int java_lang_VirtualThread::static_vthread_scope_offset;
2090 int java_lang_VirtualThread::_carrierThread_offset;
2091 int java_lang_VirtualThread::_continuation_offset;
2092 int java_lang_VirtualThread::_state_offset;
2093 int java_lang_VirtualThread::_next_offset;
2094 int java_lang_VirtualThread::_onWaitingList_offset;
2095 int java_lang_VirtualThread::_notified_offset;
2096 int java_lang_VirtualThread::_interruptible_wait_offset;
2097 int java_lang_VirtualThread::_timeout_offset;
2098 int java_lang_VirtualThread::_objectWaiter_offset;
2099
2100 #define VTHREAD_FIELDS_DO(macro) \
2101 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \
2102 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \
2103 macro(_continuation_offset, k, "cont", continuation_signature, false); \
2104 macro(_state_offset, k, "state", int_signature, false); \
2105 macro(_next_offset, k, "next", vthread_signature, false); \
2106 macro(_onWaitingList_offset, k, "onWaitingList", bool_signature, false); \
2107 macro(_notified_offset, k, "notified", bool_signature, false); \
2108 macro(_interruptible_wait_offset, k, "interruptibleWait", bool_signature, false); \
2109 macro(_timeout_offset, k, "timeout", long_signature, false);
2110
2111
2112 void java_lang_VirtualThread::compute_offsets() {
2113 InstanceKlass* k = vmClasses::VirtualThread_klass();
2114 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2115 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2116 }
2117
2118 bool java_lang_VirtualThread::is_instance(oop obj) {
2119 return obj != nullptr && is_subclass(obj->klass());
2120 }
2121
2122 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
2123 oop thread = vthread->obj_field(_carrierThread_offset);
2124 return thread;
2125 }
2126
2127 oop java_lang_VirtualThread::continuation(oop vthread) {
2128 oop cont = vthread->obj_field(_continuation_offset);
2129 return cont;
2130 }
2131
2132 int java_lang_VirtualThread::state(oop vthread) {
2133 return vthread->int_field_acquire(_state_offset);
2134 }
2135
2136 void java_lang_VirtualThread::set_state(oop vthread, int state) {
2137 vthread->release_int_field_put(_state_offset, state);
2138 }
2139
2140 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) {
2141 jint* addr = vthread->field_addr<jint>(_state_offset);
2142 int res = AtomicAccess::cmpxchg(addr, old_state, new_state);
2143 return res;
2144 }
2145
2146 oop java_lang_VirtualThread::next(oop vthread) {
2147 return vthread->obj_field(_next_offset);
2148 }
2149
2150 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) {
2151 vthread->obj_field_put(_next_offset, next_vthread);
2152 }
2153
2154 // Add vthread to the waiting list if it's not already in it. Multiple threads
2155 // could be trying to add vthread to the list at the same time, so we control
2156 // access with a cmpxchg on onWaitingList. The winner adds vthread to the list.
2157 // Method returns true if we added vthread to the list, false otherwise.
2158 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) {
2159 jboolean* addr = vthread->field_addr<jboolean>(_onWaitingList_offset);
2160 jboolean vthread_on_list = AtomicAccess::load(addr);
2161 if (!vthread_on_list) {
2162 vthread_on_list = AtomicAccess::cmpxchg(addr, (jboolean)JNI_FALSE, (jboolean)JNI_TRUE);
2163 if (!vthread_on_list) {
2164 for (;;) {
2165 oop head = list_head.resolve();
2166 java_lang_VirtualThread::set_next(vthread, head);
2167 if (list_head.cmpxchg(head, vthread) == head) return true;
2168 }
2169 }
2170 }
2171 return false; // already on waiting list
2172 }
2173
2174 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) {
2175 vthread->bool_field_put_volatile(_notified_offset, value);
2176 }
2177
2178 void java_lang_VirtualThread::set_interruptible_wait(oop vthread, jboolean value) {
2179 vthread->bool_field_put_volatile(_interruptible_wait_offset, value);
2180 }
2181
2182 jlong java_lang_VirtualThread::timeout(oop vthread) {
2183 return vthread->long_field(_timeout_offset);
2184 }
2185
2186 void java_lang_VirtualThread::set_timeout(oop vthread, jlong value) {
2187 vthread->long_field_put(_timeout_offset, value);
2188 }
2189
2190 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2191 JavaThreadStatus status = JavaThreadStatus::NEW;
2192 switch (state) {
2193 case NEW:
2194 status = JavaThreadStatus::NEW;
2195 break;
2196 case STARTED:
2197 case RUNNING:
2198 case PARKING:
2199 case TIMED_PARKING:
2200 case UNPARKED:
2201 case YIELDING:
2202 case YIELDED:
2203 case UNBLOCKED:
2204 case WAITING:
2205 case TIMED_WAITING:
2206 status = JavaThreadStatus::RUNNABLE;
2207 break;
2208 case PARKED:
2209 case PINNED:
2210 status = JavaThreadStatus::PARKED;
2211 break;
2212 case TIMED_PARKED:
2213 case TIMED_PINNED:
2214 status = JavaThreadStatus::PARKED_TIMED;
2215 break;
2216 case BLOCKING:
2217 case BLOCKED:
2218 status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER;
2219 break;
2220 case WAIT:
2221 status = JavaThreadStatus::IN_OBJECT_WAIT;
2222 break;
2223 case TIMED_WAIT:
2224 status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED;
2225 break;
2226 case TERMINATED:
2227 status = JavaThreadStatus::TERMINATED;
2228 break;
2229 default:
2230 ShouldNotReachHere();
2231 }
2232 return status;
2233 }
2234
2235 ObjectMonitor* java_lang_VirtualThread::current_pending_monitor(oop vthread) {
2236 ObjectWaiter* waiter = objectWaiter(vthread);
2237 if (waiter != nullptr && waiter->at_monitorenter()) {
2238 return waiter->monitor();
2239 }
2240 return nullptr;
2241 }
2242
2243 ObjectMonitor* java_lang_VirtualThread::current_waiting_monitor(oop vthread) {
2244 ObjectWaiter* waiter = objectWaiter(vthread);
2245 if (waiter != nullptr && waiter->is_wait()) {
2246 return waiter->monitor();
2247 }
2248 return nullptr;
2249 }
2250
2251 bool java_lang_VirtualThread::is_preempted(oop vthread) {
2252 oop continuation = java_lang_VirtualThread::continuation(vthread);
2253 assert(continuation != nullptr, "vthread with no continuation");
2254 stackChunkOop chunk = jdk_internal_vm_Continuation::tail(continuation);
2255 return chunk != nullptr && chunk->preempted();
2256 }
2257
2258 #if INCLUDE_CDS
2259 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2260 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2261 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2262 }
2263 #endif
2264
2265 // java_lang_Throwable
2266
2267 int java_lang_Throwable::_backtrace_offset;
2268 int java_lang_Throwable::_detailMessage_offset;
2269 int java_lang_Throwable::_stackTrace_offset;
2270 int java_lang_Throwable::_depth_offset;
2271 int java_lang_Throwable::_cause_offset;
2272 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2273
2274 #define THROWABLE_FIELDS_DO(macro) \
2275 macro(_backtrace_offset, k, "backtrace", object_signature, false); \
2276 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \
2277 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2278 macro(_depth_offset, k, "depth", int_signature, false); \
2279 macro(_cause_offset, k, "cause", throwable_signature, false); \
2280 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2281
2282 void java_lang_Throwable::compute_offsets() {
2283 InstanceKlass* k = vmClasses::Throwable_klass();
2284 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2285 }
2286
2287 #if INCLUDE_CDS
2288 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2289 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2290 }
2291 #endif
2292
2293 oop java_lang_Throwable::unassigned_stacktrace() {
2294 InstanceKlass* ik = vmClasses::Throwable_klass();
2295 oop base = ik->static_field_base_raw();
2296 return base->obj_field(_static_unassigned_stacktrace_offset);
2297 }
2298
2299 refArrayOop java_lang_Throwable::backtrace(oop throwable) {
2300 return (refArrayOop)throwable->obj_field_acquire(_backtrace_offset);
2301 }
2302
2303
2304 void java_lang_Throwable::set_backtrace(oop throwable, refArrayOop value) {
2305 throwable->release_obj_field_put(_backtrace_offset, value);
2306 }
2307
2308 int java_lang_Throwable::depth(oop throwable) {
2309 return throwable->int_field(_depth_offset);
2310 }
2311
2312 void java_lang_Throwable::set_depth(oop throwable, int value) {
2313 throwable->int_field_put(_depth_offset, value);
2314 }
2315
2316 oop java_lang_Throwable::message(oop throwable) {
2317 return throwable->obj_field(_detailMessage_offset);
2318 }
2319
2320 const char* java_lang_Throwable::message_as_utf8(oop throwable) {
2321 oop msg = java_lang_Throwable::message(throwable);
2322 const char* msg_utf8 = nullptr;
2323 if (msg != nullptr) {
2324 msg_utf8 = java_lang_String::as_utf8_string(msg);
2325 }
2326 return msg_utf8;
2327 }
2328
2329 oop java_lang_Throwable::cause(oop throwable) {
2330 return throwable->obj_field(_cause_offset);
2331 }
2332
2333 void java_lang_Throwable::set_message(oop throwable, oop value) {
2334 throwable->obj_field_put(_detailMessage_offset, value);
2335 }
2336
2337
2338 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2339 throwable->obj_field_put(_stackTrace_offset, st_element_array);
2340 }
2341
2342 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2343 set_stacktrace(throwable, nullptr);
2344 }
2345
2346
2347 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2348 ResourceMark rm;
2349 Klass* k = throwable->klass();
2350 assert(k != nullptr, "just checking");
2351 st->print("%s", k->external_name());
2352 oop msg = message(throwable);
2353 if (msg != nullptr) {
2354 st->print(": %s", java_lang_String::as_utf8_string(msg));
2355 }
2356 }
2357
2358 // After this many redefines, the stack trace is unreliable.
2359 const int MAX_VERSION = USHRT_MAX;
2360
2361 static inline bool version_matches(Method* method, int version) {
2362 assert(version < MAX_VERSION, "version is too big");
2363 return method != nullptr && (method->constants()->version() == version);
2364 }
2365
2366 // This class provides a simple wrapper over the internal structure of
2367 // exception backtrace to insulate users of the backtrace from needing
2368 // to know what it looks like.
2369 // The code of this class is not GC safe. Allocations can only happen
2370 // in expand().
2371 class BacktraceBuilder: public StackObj {
2372 friend class BacktraceIterator;
2373 private:
2374 refArrayHandle _backtrace;
2375 refArrayOop _head;
2376 typeArrayOop _methods;
2377 typeArrayOop _bcis;
2378 refArrayOop _mirrors;
2379 typeArrayOop _names; // Needed to insulate method name against redefinition.
2380 // True if the top frame of the backtrace is omitted because it shall be hidden.
2381 bool _has_hidden_top_frame;
2382 int _index;
2383 NoSafepointVerifier _nsv;
2384
2385 enum {
2386 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2387 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2388 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2389 trace_names_offset = java_lang_Throwable::trace_names_offset,
2390 trace_conts_offset = java_lang_Throwable::trace_conts_offset,
2391 trace_next_offset = java_lang_Throwable::trace_next_offset,
2392 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2393 trace_size = java_lang_Throwable::trace_size,
2394 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2395 };
2396
2397 // get info out of chunks
2398 static typeArrayOop get_methods(refArrayHandle chunk) {
2399 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2400 assert(methods != nullptr, "method array should be initialized in backtrace");
2401 return methods;
2402 }
2403 static typeArrayOop get_bcis(refArrayHandle chunk) {
2404 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2405 assert(bcis != nullptr, "bci array should be initialized in backtrace");
2406 return bcis;
2407 }
2408 static refArrayOop get_mirrors(refArrayHandle chunk) {
2409 refArrayOop mirrors = refArrayOop(chunk->obj_at(trace_mirrors_offset));
2410 assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2411 return mirrors;
2412 }
2413 static typeArrayOop get_names(refArrayHandle chunk) {
2414 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2415 assert(names != nullptr, "names array should be initialized in backtrace");
2416 return names;
2417 }
2418 static bool has_hidden_top_frame(refArrayHandle chunk) {
2419 oop hidden = chunk->obj_at(trace_hidden_offset);
2420 return hidden != nullptr;
2421 }
2422
2423 public:
2424
2425 // constructor for new backtrace
2426 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2427 expand(CHECK);
2428 _backtrace = refArrayHandle(THREAD, _head);
2429 _index = 0;
2430 }
2431
2432 BacktraceBuilder(Thread* thread, refArrayHandle backtrace) {
2433 _methods = get_methods(backtrace);
2434 _bcis = get_bcis(backtrace);
2435 _mirrors = get_mirrors(backtrace);
2436 _names = get_names(backtrace);
2437 _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2438 assert(_methods->length() == _bcis->length() &&
2439 _methods->length() == _mirrors->length() &&
2440 _mirrors->length() == _names->length(),
2441 "method and source information arrays should match");
2442
2443 // head is the preallocated backtrace
2444 _head = backtrace();
2445 _backtrace = refArrayHandle(thread, _head);
2446 _index = 0;
2447 }
2448
2449 void expand(TRAPS) {
2450 refArrayHandle old_head(THREAD, _head);
2451 PauseNoSafepointVerifier pnsv(&_nsv);
2452
2453 refArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2454 refArrayHandle new_head(THREAD, head);
2455
2456 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2457 typeArrayHandle new_methods(THREAD, methods);
2458
2459 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2460 typeArrayHandle new_bcis(THREAD, bcis);
2461
2462 refArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2463 refArrayHandle new_mirrors(THREAD, mirrors);
2464
2465 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2466 typeArrayHandle new_names(THREAD, names);
2467
2468 if (!old_head.is_null()) {
2469 old_head->obj_at_put(trace_next_offset, new_head());
2470 }
2471 new_head->obj_at_put(trace_methods_offset, new_methods());
2472 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2473 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2474 new_head->obj_at_put(trace_names_offset, new_names());
2475 new_head->obj_at_put(trace_hidden_offset, nullptr);
2476
2477 _head = new_head();
2478 _methods = new_methods();
2479 _bcis = new_bcis();
2480 _mirrors = new_mirrors();
2481 _names = new_names();
2482 _index = 0;
2483 }
2484
2485 refArrayOop backtrace() {
2486 return _backtrace();
2487 }
2488
2489 inline void push(Method* method, int bci, TRAPS) {
2490 // Smear the -1 bci to 0 since the array only holds unsigned
2491 // shorts. The later line number lookup would just smear the -1
2492 // to a 0 even if it could be recorded.
2493 if (bci == SynchronizationEntryBCI) bci = 0;
2494
2495 if (_index >= trace_chunk_size) {
2496 methodHandle mhandle(THREAD, method);
2497 expand(CHECK);
2498 method = mhandle();
2499 }
2500
2501 _methods->ushort_at_put(_index, method->orig_method_idnum());
2502 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2503
2504 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2505 // klass owning the symbols alive so their refcounts aren't decremented.
2506 Symbol* name = method->name();
2507 _names->symbol_at_put(_index, name);
2508
2509 // We need to save the mirrors in the backtrace to keep the class
2510 // from being unloaded while we still have this stack trace.
2511 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2512 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2513
2514 _index++;
2515 }
2516
2517 void set_has_hidden_top_frame() {
2518 if (!_has_hidden_top_frame) {
2519 // It would be nice to add java/lang/Boolean::TRUE here
2520 // to indicate that this backtrace has a hidden top frame.
2521 // But this code is used before TRUE is allocated.
2522 // Therefore let's just use an arbitrary legal oop
2523 // available right here. _methods is a short[].
2524 assert(_methods != nullptr, "we need a legal oop");
2525 _has_hidden_top_frame = true;
2526 _head->obj_at_put(trace_hidden_offset, _methods);
2527 }
2528 }
2529 };
2530
2531 struct BacktraceElement : public StackObj {
2532 int _method_id;
2533 int _bci;
2534 int _version;
2535 Symbol* _name;
2536 Handle _mirror;
2537 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2538 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2539 };
2540
2541 class BacktraceIterator : public StackObj {
2542 int _index;
2543 refArrayHandle _result;
2544 refArrayHandle _mirrors;
2545 typeArrayHandle _methods;
2546 typeArrayHandle _bcis;
2547 typeArrayHandle _names;
2548
2549 void init(refArrayHandle result, Thread* thread) {
2550 // Get method id, bci, version and mirror from chunk
2551 _result = result;
2552 if (_result.not_null()) {
2553 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2554 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2555 _mirrors = refArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2556 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2557 _index = 0;
2558 }
2559 }
2560 public:
2561 BacktraceIterator(refArrayHandle result, Thread* thread) {
2562 init(result, thread);
2563 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2564 }
2565
2566 BacktraceElement next(Thread* thread) {
2567 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2568 _methods->ushort_at(_index),
2569 Backtrace::version_at(_bcis->int_at(_index)),
2570 Backtrace::bci_at(_bcis->int_at(_index)),
2571 _names->symbol_at(_index));
2572 _index++;
2573
2574 if (_index >= java_lang_Throwable::trace_chunk_size) {
2575 int next_offset = java_lang_Throwable::trace_next_offset;
2576 // Get next chunk
2577 refArrayHandle result (thread, refArrayOop(_result->obj_at(next_offset)));
2578 init(result, thread);
2579 }
2580 return e;
2581 }
2582
2583 bool repeat() {
2584 return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2585 }
2586 };
2587
2588
2589 // Print stack trace element to the specified output stream.
2590 // The output is formatted into a stringStream and written to the outputStream in one step.
2591 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2592 int version, int bci, Symbol* name) {
2593 ResourceMark rm;
2594 stringStream ss;
2595
2596 InstanceKlass* holder = java_lang_Class::as_InstanceKlass(mirror());
2597 const char* klass_name = holder->external_name();
2598 char* method_name = name->as_C_string();
2599 ss.print("\tat %s.%s(", klass_name, method_name);
2600
2601 // Print module information
2602 ModuleEntry* module = holder->module();
2603 if (module->is_named()) {
2604 char* module_name = module->name()->as_C_string();
2605 if (module->version() != nullptr) {
2606 char* module_version = module->version()->as_C_string();
2607 ss.print("%s@%s/", module_name, module_version);
2608 } else {
2609 ss.print("%s/", module_name);
2610 }
2611 }
2612
2613 char* source_file_name = nullptr;
2614 Symbol* source = Backtrace::get_source_file_name(holder, version);
2615 if (source != nullptr) {
2616 source_file_name = source->as_C_string();
2617 }
2618
2619 // The method can be null if the requested class version is gone
2620 Method* method = holder->method_with_orig_idnum(method_id, version);
2621 if (!version_matches(method, version)) {
2622 ss.print("Redefined)");
2623 } else {
2624 int line_number = Backtrace::get_line_number(method, bci);
2625 if (line_number == -2) {
2626 ss.print("Native Method)");
2627 } else {
2628 if (source_file_name != nullptr && (line_number != -1)) {
2629 // Sourcename and linenumber
2630 ss.print("%s:%d)", source_file_name, line_number);
2631 } else if (source_file_name != nullptr) {
2632 // Just sourcename
2633 ss.print("%s)", source_file_name);
2634 } else {
2635 // Neither sourcename nor linenumber
2636 ss.print("Unknown Source)");
2637 }
2638 nmethod* nm = method->code();
2639 if (WizardMode && nm != nullptr) {
2640 ss.print("(nmethod " INTPTR_FORMAT ")", p2i(nm));
2641 }
2642 }
2643 }
2644
2645 ss.cr();
2646 st->print_raw(ss.freeze(), ss.size());
2647 }
2648
2649 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2650 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2651 int method_id = method->orig_method_idnum();
2652 int version = method->constants()->version();
2653 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2654 }
2655
2656 /**
2657 * Print the throwable message and its stack trace plus all causes by walking the
2658 * cause chain. The output looks the same as of Throwable.printStackTrace().
2659 */
2660 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2661 // First, print the message.
2662 print(throwable(), st);
2663 st->cr();
2664
2665 // Now print the stack trace.
2666 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2667 while (throwable.not_null()) {
2668 refArrayHandle result (THREAD, backtrace(throwable()));
2669 if (result.is_null()) {
2670 st->print_raw_cr("\t<<no stack trace available>>");
2671 return;
2672 }
2673 BacktraceIterator iter(result, THREAD);
2674
2675 while (iter.repeat()) {
2676 BacktraceElement bte = iter.next(THREAD);
2677 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2678 }
2679 if (THREAD->can_call_java()) {
2680 // Call getCause() which doesn't necessarily return the _cause field.
2681 ExceptionMark em(THREAD);
2682 JavaValue cause(T_OBJECT);
2683 JavaCalls::call_virtual(&cause,
2684 throwable,
2685 throwable->klass(),
2686 vmSymbols::getCause_name(),
2687 vmSymbols::void_throwable_signature(),
2688 THREAD);
2689 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2690 if (HAS_PENDING_EXCEPTION) {
2691 CLEAR_PENDING_EXCEPTION;
2692 throwable = Handle();
2693 } else {
2694 throwable = Handle(THREAD, cause.get_oop());
2695 if (throwable.not_null()) {
2696 st->print("Caused by: ");
2697 print(throwable(), st);
2698 st->cr();
2699 }
2700 }
2701 } else {
2702 st->print_raw_cr("<<cannot call Java to get cause>>");
2703 return;
2704 }
2705 }
2706 }
2707
2708 /**
2709 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2710 */
2711 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2712 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2713 JavaValue result(T_VOID);
2714 JavaCalls::call_virtual(&result,
2715 throwable,
2716 vmClasses::Throwable_klass(),
2717 vmSymbols::printStackTrace_name(),
2718 vmSymbols::void_method_signature(),
2719 THREAD);
2720 }
2721
2722 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2723 if (!StackTraceInThrowable) return;
2724 ResourceMark rm(THREAD);
2725
2726 // Start out by clearing the backtrace for this object, in case the VM
2727 // runs out of memory while allocating the stack trace
2728 set_backtrace(throwable(), nullptr);
2729 // Clear lazily constructed Java level stacktrace if refilling occurs
2730 // This is unnecessary in 1.7+ but harmless
2731 clear_stacktrace(throwable());
2732
2733 int max_depth = MaxJavaStackTraceDepth;
2734 JavaThread* thread = THREAD;
2735
2736 BacktraceBuilder bt(CHECK);
2737
2738 // If there is no Java frame just return the method that was being called
2739 // with bci 0
2740 if (!thread->has_last_Java_frame()) {
2741 if (max_depth >= 1 && method() != nullptr) {
2742 bt.push(method(), 0, CHECK);
2743 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2744 set_depth(throwable(), 1);
2745 set_backtrace(throwable(), bt.backtrace());
2746 }
2747 return;
2748 }
2749
2750 // Instead of using vframe directly, this version of fill_in_stack_trace
2751 // basically handles everything by hand. This significantly improved the
2752 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2753 // See bug 6333838 for more details.
2754 // The "ASSERT" here is to verify this method generates the exactly same stack
2755 // trace as utilizing vframe.
2756 #ifdef ASSERT
2757 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2758 #endif
2759 int total_count = 0;
2760 RegisterMap map(thread,
2761 RegisterMap::UpdateMap::skip,
2762 RegisterMap::ProcessFrames::skip,
2763 RegisterMap::WalkContinuation::include);
2764 int decode_offset = 0;
2765 nmethod* nm = nullptr;
2766 bool skip_fillInStackTrace_check = false;
2767 bool skip_throwableInit_check = false;
2768 bool skip_hidden = !ShowHiddenFrames;
2769 bool show_carrier = ShowCarrierFrames;
2770 ContinuationEntry* cont_entry = thread->last_continuation();
2771 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2772 Method* method = nullptr;
2773 int bci = 0;
2774
2775 // Compiled java method case.
2776 if (decode_offset != 0) {
2777 DebugInfoReadStream stream(nm, decode_offset);
2778 decode_offset = stream.read_int();
2779 method = (Method*)nm->metadata_at(stream.read_int());
2780 bci = stream.read_bci();
2781 } else {
2782 if (fr.is_first_frame()) break;
2783
2784 if (Continuation::is_continuation_enterSpecial(fr)) {
2785 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2786 if (!show_carrier && cont_entry->is_virtual_thread()) {
2787 break;
2788 }
2789 cont_entry = cont_entry->parent();
2790 }
2791
2792 address pc = fr.pc();
2793 if (fr.is_interpreted_frame()) {
2794 address bcp;
2795 if (!map.in_cont()) {
2796 bcp = fr.interpreter_frame_bcp();
2797 method = fr.interpreter_frame_method();
2798 } else {
2799 bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2800 method = map.stack_chunk()->interpreter_frame_method(fr);
2801 }
2802 bci = method->bci_from(bcp);
2803 fr = fr.sender(&map);
2804 } else {
2805 CodeBlob* cb = fr.cb();
2806 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2807 // but non nmethod
2808 fr = fr.sender(&map);
2809 if (cb == nullptr || !cb->is_nmethod()) {
2810 continue;
2811 }
2812 nm = cb->as_nmethod();
2813 assert(nm->method() != nullptr, "must be");
2814 if (nm->method()->is_native()) {
2815 method = nm->method();
2816 bci = 0;
2817 } else {
2818 PcDesc* pd = nm->pc_desc_at(pc);
2819 decode_offset = pd->scope_decode_offset();
2820 // if decode_offset is not equal to 0, it will execute the
2821 // "compiled java method case" at the beginning of the loop.
2822 continue;
2823 }
2824 }
2825 }
2826 #ifdef ASSERT
2827 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2828 assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2829 st.next();
2830 }
2831 #endif
2832
2833 // the format of the stacktrace will be:
2834 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2835 // - 0 or more <init> methods for the exception class (skipped)
2836 // - rest of the stack
2837
2838 if (!skip_fillInStackTrace_check) {
2839 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2840 throwable->is_a(method->method_holder())) {
2841 continue;
2842 }
2843 else {
2844 skip_fillInStackTrace_check = true; // gone past them all
2845 }
2846 }
2847 if (!skip_throwableInit_check) {
2848 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2849
2850 // skip <init> methods of the exception class and superclasses
2851 // This is similar to classic VM.
2852 if (method->is_object_constructor() &&
2853 throwable->is_a(method->method_holder())) {
2854 continue;
2855 } else {
2856 // there are none or we've seen them all - either way stop checking
2857 skip_throwableInit_check = true;
2858 }
2859 }
2860 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2861 if (skip_hidden) {
2862 if (total_count == 0) {
2863 // The top frame will be hidden from the stack trace.
2864 bt.set_has_hidden_top_frame();
2865 }
2866 continue;
2867 }
2868 }
2869
2870 bt.push(method, bci, CHECK);
2871 total_count++;
2872 }
2873
2874 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2875
2876 // Put completed stack trace into throwable object
2877 set_backtrace(throwable(), bt.backtrace());
2878 set_depth(throwable(), total_count);
2879 }
2880
2881 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2882 // No-op if stack trace is disabled
2883 if (!StackTraceInThrowable) {
2884 return;
2885 }
2886
2887 // Disable stack traces for some preallocated out of memory errors
2888 if (!Universe::should_fill_in_stack_trace(throwable)) {
2889 return;
2890 }
2891
2892 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2893 PreserveExceptionMark pm(THREAD);
2894
2895 fill_in_stack_trace(throwable, method, THREAD);
2896 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2897 // original exception via the PreserveExceptionMark destructor.
2898 CLEAR_PENDING_EXCEPTION;
2899 }
2900
2901 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2902 // Allocate stack trace - backtrace is created but not filled in
2903
2904 // No-op if stack trace is disabled
2905 if (!StackTraceInThrowable) return;
2906 BacktraceBuilder bt(CHECK); // creates a backtrace
2907 set_backtrace(throwable(), bt.backtrace());
2908 }
2909
2910
2911 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2912 // Fill in stack trace into preallocated backtrace (no GC)
2913
2914 // No-op if stack trace is disabled
2915 if (!StackTraceInThrowable) return;
2916
2917 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2918
2919 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2920
2921 refArrayHandle backtrace(THREAD, java_lang_Throwable::backtrace(throwable()));
2922 assert(backtrace.not_null(), "backtrace should have been preallocated");
2923
2924 ResourceMark rm(THREAD);
2925 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2926
2927 BacktraceBuilder bt(THREAD, backtrace);
2928
2929 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2930 // methods as preallocated errors aren't created by "java" code.
2931
2932 // fill in as much stack trace as possible
2933 int chunk_count = 0;
2934 for (;!st.at_end(); st.next()) {
2935 bt.push(st.method(), st.bci(), CHECK);
2936 chunk_count++;
2937
2938 // Bail-out for deep stacks
2939 if (chunk_count >= trace_chunk_size) break;
2940 }
2941 set_depth(throwable(), chunk_count);
2942 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2943
2944 // We support the Throwable immutability protocol defined for Java 7.
2945 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2946 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2947 }
2948
2949 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2950 refArrayHandle stack_trace_array_h, TRAPS) {
2951
2952 if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2953 THROW(vmSymbols::java_lang_NullPointerException());
2954 }
2955
2956 assert(stack_trace_array_h->is_refArray(), "Stack trace array should be an array of StackTraceElement");
2957
2958 if (stack_trace_array_h->length() != depth) {
2959 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2960 }
2961
2962 refArrayHandle result(THREAD, refArrayOop(backtrace()));
2963 BacktraceIterator iter(result, THREAD);
2964
2965 int index = 0;
2966 while (iter.repeat()) {
2967 BacktraceElement bte = iter.next(THREAD);
2968
2969 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2970
2971 if (stack_trace_element.is_null()) {
2972 THROW(vmSymbols::java_lang_NullPointerException());
2973 }
2974
2975 InstanceKlass* holder = java_lang_Class::as_InstanceKlass(bte._mirror());
2976 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2977
2978 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2979 method,
2980 bte._version,
2981 bte._bci,
2982 bte._name,
2983 CHECK);
2984 }
2985 }
2986
2987 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
2988 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
2989 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
2990 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
2991 // symbolic stacktrace of 'throwable'.
2992 assert(throwable.not_null(), "shouldn't be");
2993
2994 // Now create the message from the original exception and thread name.
2995 ResourceMark rm(current);
2996 const char *message = nullptr;
2997 oop detailed_message = java_lang_Throwable::message(throwable());
2998 if (detailed_message != nullptr) {
2999 message = java_lang_String::as_utf8_string(detailed_message);
3000 }
3001 stringStream st;
3002 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
3003 message == nullptr ? "" : ":");
3004 if (message == nullptr) {
3005 st.print("[in thread \"%s\"]", current->name());
3006 } else {
3007 st.print("%s [in thread \"%s\"]", message, current->name());
3008 }
3009
3010 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
3011 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
3012 // If new_exception returns a different exception while creating the exception,
3013 // abandon the attempt to save the initialization error and return null.
3014 if (init_error->klass()->name() != exception_name) {
3015 log_info(class, init)("Exception %s thrown while saving initialization exception",
3016 init_error->klass()->external_name());
3017 return Handle();
3018 }
3019
3020 // Call to java to fill in the stack trace and clear declaringClassObject to
3021 // not keep classes alive in the stack trace.
3022 // call this: public StackTraceElement[] getStackTrace()
3023 JavaValue result(T_ARRAY);
3024 JavaCalls::call_virtual(&result, throwable,
3025 vmClasses::Throwable_klass(),
3026 vmSymbols::getStackTrace_name(),
3027 vmSymbols::getStackTrace_signature(),
3028 current);
3029 if (!current->has_pending_exception()){
3030 Handle stack_trace(current, result.get_oop());
3031 assert(stack_trace->is_objArray(), "Should be an array");
3032 java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
3033 // Clear backtrace because the stacktrace should be used instead.
3034 set_backtrace(init_error(), nullptr);
3035 } else {
3036 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
3037 init_error->klass()->external_name());
3038 current->clear_pending_exception();
3039 }
3040
3041 return init_error;
3042 }
3043
3044 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
3045 JavaThread* current = JavaThread::current();
3046 refArrayHandle result(current, backtrace(throwable));
3047 BacktraceIterator iter(result, current);
3048 // No backtrace available.
3049 if (!iter.repeat()) return false;
3050
3051 // If the exception happened in a frame that has been hidden, i.e.,
3052 // omitted from the back trace, we can not compute the message.
3053 oop hidden = backtrace(throwable)->obj_at(trace_hidden_offset);
3054 if (hidden != nullptr) {
3055 return false;
3056 }
3057
3058 // Get first backtrace element.
3059 BacktraceElement bte = iter.next(current);
3060
3061 InstanceKlass* holder = java_lang_Class::as_InstanceKlass(bte._mirror());
3062 assert(holder != nullptr, "first element should be non-null");
3063 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
3064
3065 // Original version is no longer available.
3066 if (m == nullptr || !version_matches(m, bte._version)) {
3067 return false;
3068 }
3069
3070 *method = m;
3071 *bci = bte._bci;
3072 return true;
3073 }
3074
3075 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
3076 // Allocate java.lang.StackTraceElement instance
3077 InstanceKlass* k = vmClasses::StackTraceElement_klass();
3078 assert(k != nullptr, "must be loaded in 1.4+");
3079 if (k->should_be_initialized()) {
3080 k->initialize(CHECK_NULL);
3081 }
3082
3083 Handle element = k->allocate_instance_handle(CHECK_NULL);
3084
3085 int version = method->constants()->version();
3086 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
3087 return element();
3088 }
3089
3090 void java_lang_StackTraceElement::fill_in(Handle element,
3091 InstanceKlass* holder, const methodHandle& method,
3092 int version, int bci, Symbol* name, TRAPS) {
3093 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
3094
3095 ResourceMark rm(THREAD);
3096 HandleMark hm(THREAD);
3097
3098 // Fill in class name
3099 Handle java_class(THREAD, holder->java_mirror());
3100 oop classname = java_lang_Class::name(java_class, CHECK);
3101 java_lang_StackTraceElement::set_declaringClass(element(), classname);
3102 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
3103
3104 oop loader = holder->class_loader();
3105 if (loader != nullptr) {
3106 oop loader_name = java_lang_ClassLoader::name(loader);
3107 if (loader_name != nullptr)
3108 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
3109 }
3110
3111 // Fill in method name
3112 oop methodname = StringTable::intern(name, CHECK);
3113 java_lang_StackTraceElement::set_methodName(element(), methodname);
3114
3115 // Fill in module name and version
3116 ModuleEntry* module = holder->module();
3117 if (module->is_named()) {
3118 oop module_name = StringTable::intern(module->name(), CHECK);
3119 java_lang_StackTraceElement::set_moduleName(element(), module_name);
3120 oop module_version;
3121 if (module->version() != nullptr) {
3122 module_version = StringTable::intern(module->version(), CHECK);
3123 } else {
3124 module_version = nullptr;
3125 }
3126 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
3127 }
3128
3129 if (method() == nullptr || !version_matches(method(), version)) {
3130 // The method was redefined, accurate line number information isn't available
3131 java_lang_StackTraceElement::set_fileName(element(), nullptr);
3132 java_lang_StackTraceElement::set_lineNumber(element(), -1);
3133 } else {
3134 Symbol* source;
3135 oop source_file;
3136 int line_number;
3137 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
3138
3139 java_lang_StackTraceElement::set_fileName(element(), source_file);
3140 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
3141 }
3142 }
3143
3144 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
3145 InstanceKlass* holder,
3146 int version,
3147 const methodHandle& method,
3148 int bci,
3149 Symbol*& source,
3150 oop& source_file,
3151 int& line_number, TRAPS) {
3152 // Fill in source file name and line number.
3153 source = Backtrace::get_source_file_name(holder, version);
3154 source_file = java_lang_Class::source_file(java_class());
3155 if (source != nullptr) {
3156 // Class was not redefined. We can trust its cache if set,
3157 // else we have to initialize it.
3158 if (source_file == nullptr) {
3159 source_file = StringTable::intern(source, CHECK);
3160 java_lang_Class::set_source_file(java_class(), source_file);
3161 }
3162 } else {
3163 // Class was redefined. Dump the cache if it was set.
3164 if (source_file != nullptr) {
3165 source_file = nullptr;
3166 java_lang_Class::set_source_file(java_class(), source_file);
3167 }
3168 }
3169 line_number = Backtrace::get_line_number(method(), bci);
3170 }
3171
3172 // java_lang_ClassFrameInfo
3173
3174 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
3175 int java_lang_ClassFrameInfo::_flags_offset;
3176
3177 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
3178 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \
3179 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false)
3180
3181 void java_lang_ClassFrameInfo::compute_offsets() {
3182 InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
3183 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3184 }
3185
3186 #if INCLUDE_CDS
3187 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
3188 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3189 }
3190 #endif
3191
3192 static int get_flags(const methodHandle& m) {
3193 int flags = m->access_flags().as_method_flags();
3194 if (m->is_object_constructor()) {
3195 flags |= java_lang_invoke_MemberName::MN_IS_OBJECT_CONSTRUCTOR;
3196 } else {
3197 // Note: Static initializers can be here. Record them as plain methods.
3198 flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
3199 }
3200 if (m->caller_sensitive()) {
3201 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
3202 }
3203 if (m->is_hidden()) {
3204 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3205 }
3206 assert((flags & 0xFF000000) == 0, "unexpected flags");
3207 return flags;
3208 }
3209
3210 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3211 return obj->obj_field(_classOrMemberName_offset);
3212 }
3213
3214 int java_lang_ClassFrameInfo::flags(oop obj) {
3215 return obj->int_field(_flags_offset);
3216 }
3217
3218 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3219 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3220 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3221 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3222 stackFrame->int_field_put(_flags_offset, flags);
3223 }
3224
3225 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3226 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3227 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3228 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3229 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3230 stackFrame->int_field_put(_flags_offset, flags);
3231 }
3232
3233
3234 // java_lang_StackFrameInfo
3235
3236 int java_lang_StackFrameInfo::_type_offset;
3237 int java_lang_StackFrameInfo::_name_offset;
3238 int java_lang_StackFrameInfo::_bci_offset;
3239 int java_lang_StackFrameInfo::_version_offset;
3240 int java_lang_StackFrameInfo::_contScope_offset;
3241
3242 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3243 macro(_type_offset, k, "type", object_signature, false); \
3244 macro(_name_offset, k, "name", string_signature, false); \
3245 macro(_bci_offset, k, "bci", int_signature, false); \
3246 macro(_contScope_offset, k, "contScope", continuationscope_signature, false)
3247
3248 void java_lang_StackFrameInfo::compute_offsets() {
3249 InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3250 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3251 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3252 }
3253
3254 #if INCLUDE_CDS
3255 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3256 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3257 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3258 }
3259 #endif
3260
3261 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3262 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3263 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3264 return method;
3265 }
3266
3267 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3268 // set Method* or mid/cpref
3269 HandleMark hm(THREAD);
3270 Handle cont_h(THREAD, cont);
3271 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3272
3273 // set bci
3274 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3275 // method may be redefined; store the version
3276 int version = method->constants()->version();
3277 assert((jushort)version == version, "version should be short");
3278 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3279
3280 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3281 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3282 }
3283
3284 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3285 ResourceMark rm(THREAD);
3286 HandleMark hm(THREAD);
3287
3288 Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3289 InstanceKlass* holder = method->method_holder();
3290 short version = stackFrame->short_field(_version_offset);
3291 int bci = stackFrame->int_field(_bci_offset);
3292 Symbol* name = method->name();
3293 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3294 }
3295
3296 oop java_lang_StackFrameInfo::type(oop obj) {
3297 return obj->obj_field(_type_offset);
3298 }
3299
3300 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3301 obj->obj_field_put(_type_offset, value);
3302 }
3303
3304 oop java_lang_StackFrameInfo::name(oop obj) {
3305 return obj->obj_field(_name_offset);
3306 }
3307
3308 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3309 obj->obj_field_put(_name_offset, value);
3310 }
3311
3312 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3313 obj->short_field_put(_version_offset, value);
3314 }
3315
3316 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3317 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3318 obj->int_field_put(_bci_offset, value);
3319 }
3320
3321 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3322 obj->obj_field_put(_contScope_offset, value);
3323 }
3324
3325 int java_lang_LiveStackFrameInfo::_monitors_offset;
3326 int java_lang_LiveStackFrameInfo::_locals_offset;
3327 int java_lang_LiveStackFrameInfo::_operands_offset;
3328 int java_lang_LiveStackFrameInfo::_mode_offset;
3329
3330 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3331 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
3332 macro(_locals_offset, k, "locals", object_array_signature, false); \
3333 macro(_operands_offset, k, "operands", object_array_signature, false); \
3334 macro(_mode_offset, k, "mode", int_signature, false)
3335
3336 void java_lang_LiveStackFrameInfo::compute_offsets() {
3337 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3338 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3339 }
3340
3341 #if INCLUDE_CDS
3342 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3343 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3344 }
3345 #endif
3346
3347 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3348 obj->obj_field_put(_monitors_offset, value);
3349 }
3350
3351 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3352 obj->obj_field_put(_locals_offset, value);
3353 }
3354
3355 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3356 obj->obj_field_put(_operands_offset, value);
3357 }
3358
3359 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3360 obj->int_field_put(_mode_offset, value);
3361 }
3362
3363
3364 // java_lang_AccessibleObject
3365
3366 int java_lang_reflect_AccessibleObject::_override_offset;
3367
3368 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3369 macro(_override_offset, k, "override", bool_signature, false)
3370
3371 void java_lang_reflect_AccessibleObject::compute_offsets() {
3372 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3373 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3374 }
3375
3376 #if INCLUDE_CDS
3377 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3378 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3379 }
3380 #endif
3381
3382 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3383 return (jboolean) reflect->bool_field(_override_offset);
3384 }
3385
3386 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3387 reflect->bool_field_put(_override_offset, (int) value);
3388 }
3389
3390 // java_lang_reflect_Method
3391
3392 int java_lang_reflect_Method::_clazz_offset;
3393 int java_lang_reflect_Method::_name_offset;
3394 int java_lang_reflect_Method::_returnType_offset;
3395 int java_lang_reflect_Method::_parameterTypes_offset;
3396 int java_lang_reflect_Method::_exceptionTypes_offset;
3397 int java_lang_reflect_Method::_slot_offset;
3398 int java_lang_reflect_Method::_modifiers_offset;
3399 int java_lang_reflect_Method::_signature_offset;
3400 int java_lang_reflect_Method::_annotations_offset;
3401 int java_lang_reflect_Method::_parameter_annotations_offset;
3402 int java_lang_reflect_Method::_annotation_default_offset;
3403
3404 #define METHOD_FIELDS_DO(macro) \
3405 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3406 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3407 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
3408 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3409 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3410 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3411 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3412 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3413 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3414 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3415 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
3416
3417 void java_lang_reflect_Method::compute_offsets() {
3418 InstanceKlass* k = vmClasses::reflect_Method_klass();
3419 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3420 }
3421
3422 #if INCLUDE_CDS
3423 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3424 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3425 }
3426 #endif
3427
3428 Handle java_lang_reflect_Method::create(TRAPS) {
3429 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3430 InstanceKlass* klass = vmClasses::reflect_Method_klass();
3431 // This class is eagerly initialized during VM initialization, since we keep a reference
3432 // to one of the methods
3433 assert(klass->is_initialized(), "must be initialized");
3434 return klass->allocate_instance_handle(THREAD);
3435 }
3436
3437 oop java_lang_reflect_Method::clazz(oop reflect) {
3438 return reflect->obj_field(_clazz_offset);
3439 }
3440
3441 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3442 reflect->obj_field_put(_clazz_offset, value);
3443 }
3444
3445 int java_lang_reflect_Method::slot(oop reflect) {
3446 return reflect->int_field(_slot_offset);
3447 }
3448
3449 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3450 reflect->int_field_put(_slot_offset, value);
3451 }
3452
3453 void java_lang_reflect_Method::set_name(oop method, oop value) {
3454 method->obj_field_put(_name_offset, value);
3455 }
3456
3457 oop java_lang_reflect_Method::return_type(oop method) {
3458 return method->obj_field(_returnType_offset);
3459 }
3460
3461 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3462 method->obj_field_put(_returnType_offset, value);
3463 }
3464
3465 oop java_lang_reflect_Method::parameter_types(oop method) {
3466 return method->obj_field(_parameterTypes_offset);
3467 }
3468
3469 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3470 method->obj_field_put(_parameterTypes_offset, value);
3471 }
3472
3473 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3474 method->obj_field_put(_exceptionTypes_offset, value);
3475 }
3476
3477 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3478 method->int_field_put(_modifiers_offset, value);
3479 }
3480
3481 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3482 method->obj_field_put(_signature_offset, value);
3483 }
3484
3485 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3486 method->obj_field_put(_annotations_offset, value);
3487 }
3488
3489 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3490 method->obj_field_put(_parameter_annotations_offset, value);
3491 }
3492
3493 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3494 method->obj_field_put(_annotation_default_offset, value);
3495 }
3496
3497 int java_lang_reflect_Constructor::_clazz_offset;
3498 int java_lang_reflect_Constructor::_parameterTypes_offset;
3499 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3500 int java_lang_reflect_Constructor::_slot_offset;
3501 int java_lang_reflect_Constructor::_modifiers_offset;
3502 int java_lang_reflect_Constructor::_signature_offset;
3503 int java_lang_reflect_Constructor::_annotations_offset;
3504 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3505
3506 #define CONSTRUCTOR_FIELDS_DO(macro) \
3507 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3508 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3509 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3510 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3511 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3512 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3513 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3514 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3515
3516 void java_lang_reflect_Constructor::compute_offsets() {
3517 InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3518 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3519 }
3520
3521 #if INCLUDE_CDS
3522 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3523 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3524 }
3525 #endif
3526
3527 Handle java_lang_reflect_Constructor::create(TRAPS) {
3528 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3529 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3530 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3531 InstanceKlass* ik = InstanceKlass::cast(k);
3532 // Ensure it is initialized
3533 ik->initialize(CHECK_NH);
3534 return ik->allocate_instance_handle(THREAD);
3535 }
3536
3537 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3538 return reflect->obj_field(_clazz_offset);
3539 }
3540
3541 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3542 reflect->obj_field_put(_clazz_offset, value);
3543 }
3544
3545 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3546 return constructor->obj_field(_parameterTypes_offset);
3547 }
3548
3549 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3550 constructor->obj_field_put(_parameterTypes_offset, value);
3551 }
3552
3553 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3554 constructor->obj_field_put(_exceptionTypes_offset, value);
3555 }
3556
3557 int java_lang_reflect_Constructor::slot(oop reflect) {
3558 return reflect->int_field(_slot_offset);
3559 }
3560
3561 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3562 reflect->int_field_put(_slot_offset, value);
3563 }
3564
3565 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3566 constructor->int_field_put(_modifiers_offset, value);
3567 }
3568
3569 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3570 constructor->obj_field_put(_signature_offset, value);
3571 }
3572
3573 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3574 constructor->obj_field_put(_annotations_offset, value);
3575 }
3576
3577 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3578 method->obj_field_put(_parameter_annotations_offset, value);
3579 }
3580
3581 int java_lang_reflect_Field::_clazz_offset;
3582 int java_lang_reflect_Field::_name_offset;
3583 int java_lang_reflect_Field::_type_offset;
3584 int java_lang_reflect_Field::_slot_offset;
3585 int java_lang_reflect_Field::_modifiers_offset;
3586 int java_lang_reflect_Field::_flags_offset;
3587 int java_lang_reflect_Field::_signature_offset;
3588 int java_lang_reflect_Field::_annotations_offset;
3589 JFR_ONLY(int java_lang_reflect_Field::_jfr_epoch_offset;)
3590
3591 #define FIELD_FIELDS_DO(macro) \
3592 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3593 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3594 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \
3595 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3596 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3597 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3598 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3599 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3600
3601 void java_lang_reflect_Field::compute_offsets() {
3602 InstanceKlass* k = vmClasses::reflect_Field_klass();
3603 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3604 JFR_ONLY(FIELD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);)
3605 }
3606
3607 #if INCLUDE_CDS
3608 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3609 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3610 JFR_ONLY(FIELD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);)
3611 }
3612 #endif
3613
3614 Handle java_lang_reflect_Field::create(TRAPS) {
3615 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3616 Symbol* name = vmSymbols::java_lang_reflect_Field();
3617 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3618 InstanceKlass* ik = InstanceKlass::cast(k);
3619 // Ensure it is initialized
3620 ik->initialize(CHECK_NH);
3621 return ik->allocate_instance_handle(THREAD);
3622 }
3623
3624 oop java_lang_reflect_Field::clazz(oop reflect) {
3625 return reflect->obj_field(_clazz_offset);
3626 }
3627
3628 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3629 reflect->obj_field_put(_clazz_offset, value);
3630 }
3631
3632 oop java_lang_reflect_Field::name(oop field) {
3633 return field->obj_field(_name_offset);
3634 }
3635
3636 void java_lang_reflect_Field::set_name(oop field, oop value) {
3637 field->obj_field_put(_name_offset, value);
3638 }
3639
3640 oop java_lang_reflect_Field::type(oop field) {
3641 return field->obj_field(_type_offset);
3642 }
3643
3644 void java_lang_reflect_Field::set_type(oop field, oop value) {
3645 field->obj_field_put(_type_offset, value);
3646 }
3647
3648 int java_lang_reflect_Field::slot(oop reflect) {
3649 return reflect->int_field(_slot_offset);
3650 }
3651
3652 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3653 reflect->int_field_put(_slot_offset, value);
3654 }
3655
3656 int java_lang_reflect_Field::modifiers(oop field) {
3657 return field->int_field(_modifiers_offset);
3658 }
3659
3660 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3661 field->int_field_put(_modifiers_offset, value);
3662 }
3663
3664 void java_lang_reflect_Field::set_flags(oop field, int value) {
3665 field->int_field_put(_flags_offset, value);
3666 }
3667
3668 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3669 field->obj_field_put(_signature_offset, value);
3670 }
3671
3672 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3673 field->obj_field_put(_annotations_offset, value);
3674 }
3675
3676 #if INCLUDE_JFR
3677 u2 java_lang_reflect_Field::epoch(oop ref) {
3678 return static_cast<u2>(ref->int_field(_jfr_epoch_offset));
3679 }
3680 #endif // INCLUDE_JFR
3681
3682 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3683 // Allocate java.lang.reflect.RecordComponent instance
3684 HandleMark hm(THREAD);
3685 InstanceKlass* ik = vmClasses::RecordComponent_klass();
3686 assert(ik != nullptr, "must be loaded");
3687 ik->initialize(CHECK_NULL);
3688
3689 Handle element = ik->allocate_instance_handle(CHECK_NULL);
3690
3691 Handle decl_class(THREAD, holder->java_mirror());
3692 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3693
3694 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3695 oop component_name = StringTable::intern(name, CHECK_NULL);
3696 java_lang_reflect_RecordComponent::set_name(element(), component_name);
3697
3698 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3699 Handle component_type_h =
3700 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3701 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3702
3703 Method* accessor_method = nullptr;
3704 {
3705 // Prepend "()" to type to create the full method signature.
3706 ResourceMark rm(THREAD);
3707 int sig_len = type->utf8_length() + 3; // "()" and null char
3708 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3709 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3710 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3711 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3712 }
3713
3714 if (accessor_method != nullptr) {
3715 methodHandle method(THREAD, accessor_method);
3716 oop m = Reflection::new_method(method, false, CHECK_NULL);
3717 java_lang_reflect_RecordComponent::set_accessor(element(), m);
3718 } else {
3719 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3720 }
3721
3722 int sig_index = component->generic_signature_index();
3723 if (sig_index > 0) {
3724 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3725 oop component_sig = StringTable::intern(sig, CHECK_NULL);
3726 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3727 } else {
3728 java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3729 }
3730
3731 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3732 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3733
3734 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3735 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3736
3737 return element();
3738 }
3739
3740 int reflect_ConstantPool::_vmholder_offset;
3741
3742 void reflect_ConstantPool::compute_offsets() {
3743 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3744 // The field is injected and called Object vmholder in the jdk.internal.reflect.ConstantPool class.
3745 CONSTANTPOOL_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3746 }
3747
3748 #if INCLUDE_CDS
3749 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3750 CONSTANTPOOL_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3751 }
3752 #endif
3753
3754 int java_lang_reflect_Parameter::_name_offset;
3755 int java_lang_reflect_Parameter::_modifiers_offset;
3756 int java_lang_reflect_Parameter::_index_offset;
3757 int java_lang_reflect_Parameter::_executable_offset;
3758
3759 #define PARAMETER_FIELDS_DO(macro) \
3760 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3761 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3762 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \
3763 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3764
3765 void java_lang_reflect_Parameter::compute_offsets() {
3766 InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3767 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3768 }
3769
3770 #if INCLUDE_CDS
3771 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3772 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3773 }
3774 #endif
3775
3776 Handle java_lang_reflect_Parameter::create(TRAPS) {
3777 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3778 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3779 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3780 InstanceKlass* ik = InstanceKlass::cast(k);
3781 // Ensure it is initialized
3782 ik->initialize(CHECK_NH);
3783 return ik->allocate_instance_handle(THREAD);
3784 }
3785
3786 oop java_lang_reflect_Parameter::name(oop param) {
3787 return param->obj_field(_name_offset);
3788 }
3789
3790 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3791 param->obj_field_put(_name_offset, value);
3792 }
3793
3794 int java_lang_reflect_Parameter::modifiers(oop param) {
3795 return param->int_field(_modifiers_offset);
3796 }
3797
3798 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3799 param->int_field_put(_modifiers_offset, value);
3800 }
3801
3802 int java_lang_reflect_Parameter::index(oop param) {
3803 return param->int_field(_index_offset);
3804 }
3805
3806 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3807 param->int_field_put(_index_offset, value);
3808 }
3809
3810 oop java_lang_reflect_Parameter::executable(oop param) {
3811 return param->obj_field(_executable_offset);
3812 }
3813
3814 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3815 param->obj_field_put(_executable_offset, value);
3816 }
3817
3818 // java_lang_Module
3819
3820 int java_lang_Module::_loader_offset;
3821 int java_lang_Module::_name_offset;
3822 int java_lang_Module::_module_entry_offset;
3823
3824 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3825 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3826 return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3827 vmSymbols::java_lang_module_init_signature(),
3828 loader, module_name, CHECK_NH);
3829 }
3830
3831 #define MODULE_FIELDS_DO(macro) \
3832 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3833 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false)
3834
3835 void java_lang_Module::compute_offsets() {
3836 InstanceKlass* k = vmClasses::Module_klass();
3837 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3838 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3839 }
3840
3841 #if INCLUDE_CDS
3842 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3843 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3844 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3845 }
3846 #endif
3847
3848 oop java_lang_Module::loader(oop module) {
3849 return module->obj_field(_loader_offset);
3850 }
3851
3852 void java_lang_Module::set_loader(oop module, oop value) {
3853 module->obj_field_put(_loader_offset, value);
3854 }
3855
3856 oop java_lang_Module::name(oop module) {
3857 return module->obj_field(_name_offset);
3858 }
3859
3860 void java_lang_Module::set_name(oop module, oop value) {
3861 module->obj_field_put(_name_offset, value);
3862 }
3863
3864 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3865 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3866 assert(module != nullptr, "module can't be null");
3867 assert(oopDesc::is_oop(module), "module must be oop");
3868
3869 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3870 return module_entry;
3871 }
3872
3873 ModuleEntry* java_lang_Module::module_entry(oop module) {
3874 ModuleEntry* module_entry = module_entry_raw(module);
3875 if (module_entry == nullptr) {
3876 // If the inject field containing the ModuleEntry* is null then return the
3877 // class loader's unnamed module.
3878 oop loader = java_lang_Module::loader(module);
3879 Handle h_loader = Handle(Thread::current(), loader);
3880 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3881 return loader_cld->unnamed_module();
3882 }
3883 return module_entry;
3884 }
3885
3886 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3887 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3888 assert(module != nullptr, "module can't be null");
3889 assert(oopDesc::is_oop(module), "module must be oop");
3890 module->address_field_put(_module_entry_offset, (address)module_entry);
3891 }
3892
3893 Handle reflect_ConstantPool::create(TRAPS) {
3894 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3895 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3896 // Ensure it is initialized
3897 k->initialize(CHECK_NH);
3898 return k->allocate_instance_handle(THREAD);
3899 }
3900
3901
3902 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3903 assert(_vmholder_offset != 0, "Uninitialized vmholder");
3904 oop mirror = value->pool_holder()->java_mirror();
3905 // Save the mirror to get back the constant pool.
3906 reflect->obj_field_put(_vmholder_offset, mirror);
3907 }
3908
3909 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3910 assert(_vmholder_offset != 0, "Uninitialized vmholder");
3911 oop mirror = reflect->obj_field(_vmholder_offset);
3912 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(mirror);
3913
3914 // Get the constant pool back from the klass. Since class redefinition
3915 // merges the new constant pool into the old, this is essentially the
3916 // same constant pool as the original. If constant pool merging is
3917 // no longer done in the future, this will have to change to save
3918 // the original.
3919 return ik->constants();
3920 }
3921
3922
3923 // Support for java_lang_ref_Reference
3924
3925 bool java_lang_ref_Reference::_offsets_initialized;
3926
3927 int java_lang_ref_Reference::_referent_offset;
3928 int java_lang_ref_Reference::_queue_offset;
3929 int java_lang_ref_Reference::_next_offset;
3930 int java_lang_ref_Reference::_discovered_offset;
3931
3932 #define REFERENCE_FIELDS_DO(macro) \
3933 macro(_referent_offset, k, "referent", object_signature, false); \
3934 macro(_queue_offset, k, "queue", referencequeue_signature, false); \
3935 macro(_next_offset, k, "next", reference_signature, false); \
3936 macro(_discovered_offset, k, "discovered", reference_signature, false);
3937
3938 void java_lang_ref_Reference::compute_offsets() {
3939 if (_offsets_initialized) {
3940 return;
3941 }
3942 _offsets_initialized = true;
3943 InstanceKlass* k = vmClasses::Reference_klass();
3944 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3945 }
3946
3947 #if INCLUDE_CDS
3948 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3949 f->do_bool(&_offsets_initialized);
3950 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3951 }
3952 #endif
3953
3954 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3955 assert(obj != nullptr, "sanity");
3956 if (offset != _referent_offset) {
3957 return false;
3958 }
3959
3960 Klass* k = obj->klass();
3961 if (!k->is_instance_klass()) {
3962 return false;
3963 }
3964
3965 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3966 bool is_reference = ik->reference_type() != REF_NONE;
3967 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
3968 return is_reference;
3969 }
3970
3971 int* java_lang_boxing_object::_offsets;
3972
3973 #define BOXING_FIELDS_DO(macro) \
3974 macro(java_lang_boxing_object::_offsets[T_BOOLEAN - T_BOOLEAN], vmClasses::Boolean_klass(), "value", bool_signature, false); \
3975 macro(java_lang_boxing_object::_offsets[T_CHAR - T_BOOLEAN], vmClasses::Character_klass(), "value", char_signature, false); \
3976 macro(java_lang_boxing_object::_offsets[T_FLOAT - T_BOOLEAN], vmClasses::Float_klass(), "value", float_signature, false); \
3977 macro(java_lang_boxing_object::_offsets[T_DOUBLE - T_BOOLEAN], vmClasses::Double_klass(), "value", double_signature, false); \
3978 macro(java_lang_boxing_object::_offsets[T_BYTE - T_BOOLEAN], vmClasses::Byte_klass(), "value", byte_signature, false); \
3979 macro(java_lang_boxing_object::_offsets[T_SHORT - T_BOOLEAN], vmClasses::Short_klass(), "value", short_signature, false); \
3980 macro(java_lang_boxing_object::_offsets[T_INT - T_BOOLEAN], vmClasses::Integer_klass(), "value", int_signature, false); \
3981 macro(java_lang_boxing_object::_offsets[T_LONG - T_BOOLEAN], vmClasses::Long_klass(), "value", long_signature, false);
3982
3983 void java_lang_boxing_object::compute_offsets() {
3984 assert(T_LONG - T_BOOLEAN == 7, "Sanity check");
3985 java_lang_boxing_object::_offsets = NEW_C_HEAP_ARRAY(int, 8, mtInternal);
3986 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3987 }
3988
3989 #if INCLUDE_CDS
3990 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
3991 if (f->reading()) {
3992 assert(T_LONG - T_BOOLEAN == 7, "Sanity check");
3993 java_lang_boxing_object::_offsets = NEW_C_HEAP_ARRAY(int, 8, mtInternal);
3994 }
3995 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3996 }
3997 #endif
3998
3999 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
4000 Klass* k = vmClasses::box_klass(type);
4001 if (k == nullptr) return nullptr;
4002 InstanceKlass* ik = InstanceKlass::cast(k);
4003 if (!ik->is_initialized()) {
4004 ik->initialize(CHECK_NULL);
4005 }
4006 return ik->allocate_instance(THREAD);
4007 }
4008
4009
4010 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
4011 oop box = initialize_and_allocate(type, CHECK_NULL);
4012 if (box == nullptr) return nullptr;
4013 switch (type) {
4014 case T_BOOLEAN:
4015 box->bool_field_put(value_offset(type), value->z);
4016 break;
4017 case T_CHAR:
4018 box->char_field_put(value_offset(type), value->c);
4019 break;
4020 case T_FLOAT:
4021 box->float_field_put(value_offset(type), value->f);
4022 break;
4023 case T_DOUBLE:
4024 box->double_field_put(value_offset(type), value->d);
4025 break;
4026 case T_BYTE:
4027 box->byte_field_put(value_offset(type), value->b);
4028 break;
4029 case T_SHORT:
4030 box->short_field_put(value_offset(type), value->s);
4031 break;
4032 case T_INT:
4033 box->int_field_put(value_offset(type), value->i);
4034 break;
4035 case T_LONG:
4036 box->long_field_put(value_offset(type), value->j);
4037 break;
4038 default:
4039 return nullptr;
4040 }
4041 return box;
4042 }
4043
4044
4045 BasicType java_lang_boxing_object::basic_type(oop box) {
4046 if (box == nullptr) return T_ILLEGAL;
4047 BasicType type = vmClasses::box_klass_type(box->klass());
4048 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
4049 return T_ILLEGAL;
4050 return type;
4051 }
4052
4053
4054 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
4055 BasicType type = vmClasses::box_klass_type(box->klass());
4056 switch (type) {
4057 case T_BOOLEAN:
4058 value->z = box->bool_field(value_offset(type));
4059 break;
4060 case T_CHAR:
4061 value->c = box->char_field(value_offset(type));
4062 break;
4063 case T_FLOAT:
4064 value->f = box->float_field(value_offset(type));
4065 break;
4066 case T_DOUBLE:
4067 value->d = box->double_field(value_offset(type));
4068 break;
4069 case T_BYTE:
4070 value->b = box->byte_field(value_offset(type));
4071 break;
4072 case T_SHORT:
4073 value->s = box->short_field(value_offset(type));
4074 break;
4075 case T_INT:
4076 value->i = box->int_field(value_offset(type));
4077 break;
4078 case T_LONG:
4079 value->j = box->long_field(value_offset(type));
4080 break;
4081 default:
4082 return T_ILLEGAL;
4083 } // end switch
4084 return type;
4085 }
4086
4087
4088 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
4089 BasicType type = vmClasses::box_klass_type(box->klass());
4090 switch (type) {
4091 case T_BOOLEAN:
4092 box->bool_field_put(value_offset(type), value->z);
4093 break;
4094 case T_CHAR:
4095 box->char_field_put(value_offset(type), value->c);
4096 break;
4097 case T_FLOAT:
4098 box->float_field_put(value_offset(type), value->f);
4099 break;
4100 case T_DOUBLE:
4101 box->double_field_put(value_offset(type), value->d);
4102 break;
4103 case T_BYTE:
4104 box->byte_field_put(value_offset(type), value->b);
4105 break;
4106 case T_SHORT:
4107 box->short_field_put(value_offset(type), value->s);
4108 break;
4109 case T_INT:
4110 box->int_field_put(value_offset(type), value->i);
4111 break;
4112 case T_LONG:
4113 box->long_field_put(value_offset(type), value->j);
4114 break;
4115 default:
4116 return T_ILLEGAL;
4117 } // end switch
4118 return type;
4119 }
4120
4121
4122 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
4123 switch (type) {
4124 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
4125 case T_CHAR: st->print("%d", value->c); break;
4126 case T_BYTE: st->print("%d", value->b); break;
4127 case T_SHORT: st->print("%d", value->s); break;
4128 case T_INT: st->print("%d", value->i); break;
4129 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
4130 case T_FLOAT: st->print("%f", value->f); break;
4131 case T_DOUBLE: st->print("%lf", value->d); break;
4132 default: st->print("type %d?", type); break;
4133 }
4134 }
4135
4136
4137 // Support for java_lang_ref_SoftReference
4138 //
4139
4140 int java_lang_ref_SoftReference::_timestamp_offset;
4141 int java_lang_ref_SoftReference::_static_clock_offset;
4142
4143 #define SOFTREFERENCE_FIELDS_DO(macro) \
4144 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
4145 macro(_static_clock_offset, k, "clock", long_signature, true)
4146
4147 void java_lang_ref_SoftReference::compute_offsets() {
4148 InstanceKlass* k = vmClasses::SoftReference_klass();
4149 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4150 }
4151
4152 #if INCLUDE_CDS
4153 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
4154 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4155 }
4156 #endif
4157
4158 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
4159 return ref->long_field(_timestamp_offset);
4160 }
4161
4162 jlong java_lang_ref_SoftReference::clock() {
4163 InstanceKlass* ik = vmClasses::SoftReference_klass();
4164 oop base = ik->static_field_base_raw();
4165 return base->long_field(_static_clock_offset);
4166 }
4167
4168 void java_lang_ref_SoftReference::set_clock(jlong value) {
4169 InstanceKlass* ik = vmClasses::SoftReference_klass();
4170 oop base = ik->static_field_base_raw();
4171 base->long_field_put(_static_clock_offset, value);
4172 }
4173
4174 // Support for java_lang_invoke_DirectMethodHandle
4175
4176 int java_lang_invoke_DirectMethodHandle::_member_offset;
4177
4178 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
4179 oop member_name = nullptr;
4180 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
4181 "a DirectMethodHandle oop is expected");
4182 return dmh->obj_field(_member_offset);
4183 }
4184
4185 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
4186 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
4187
4188 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
4189 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
4190 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4191 }
4192
4193 #if INCLUDE_CDS
4194 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
4195 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4196 }
4197 #endif
4198
4199 // Support for java_lang_invoke_MethodHandle
4200
4201 int java_lang_invoke_MethodHandle::_type_offset;
4202 int java_lang_invoke_MethodHandle::_form_offset;
4203
4204 int java_lang_invoke_MemberName::_clazz_offset;
4205 int java_lang_invoke_MemberName::_name_offset;
4206 int java_lang_invoke_MemberName::_type_offset;
4207 int java_lang_invoke_MemberName::_flags_offset;
4208 int java_lang_invoke_MemberName::_method_offset;
4209 int java_lang_invoke_MemberName::_vmindex_offset;
4210
4211 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
4212 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
4213
4214 int java_lang_invoke_LambdaForm::_vmentry_offset;
4215
4216 #define METHODHANDLE_FIELDS_DO(macro) \
4217 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4218 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
4219
4220 void java_lang_invoke_MethodHandle::compute_offsets() {
4221 InstanceKlass* k = vmClasses::MethodHandle_klass();
4222 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4223 }
4224
4225 #if INCLUDE_CDS
4226 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4227 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4228 }
4229 #endif
4230
4231 #define MEMBERNAME_FIELDS_DO(macro) \
4232 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4233 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4234 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
4235 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
4236 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
4237
4238 void java_lang_invoke_MemberName::compute_offsets() {
4239 InstanceKlass* k = vmClasses::MemberName_klass();
4240 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4241 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4242 }
4243
4244 #if INCLUDE_CDS
4245 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4246 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4247 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4248 }
4249 #endif
4250
4251 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4252 macro(_vmholder_offset, k, "vmholder", class_signature, false)
4253
4254 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4255 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4256 assert(k != nullptr, "jdk mismatch");
4257 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4258 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4259 }
4260
4261 #if INCLUDE_CDS
4262 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4263 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4264 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4265 }
4266 #endif
4267
4268 #define LAMBDAFORM_FIELDS_DO(macro) \
4269 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4270
4271 void java_lang_invoke_LambdaForm::compute_offsets() {
4272 InstanceKlass* k = vmClasses::LambdaForm_klass();
4273 assert (k != nullptr, "jdk mismatch");
4274 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4275 }
4276
4277 #if INCLUDE_CDS
4278 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4279 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4280 }
4281 #endif
4282
4283 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4284 return obj != nullptr && is_subclass(obj->klass());
4285 }
4286
4287 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4288 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4289
4290 #define NEP_FIELDS_DO(macro) \
4291 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
4292 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4293
4294 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4295 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4296 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4297 }
4298
4299 #if INCLUDE_CDS
4300 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4301 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4302 }
4303 #endif
4304
4305 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4306 return entry->obj_field(_method_type_offset);
4307 }
4308
4309 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4310 return entry->long_field(_downcall_stub_address_offset);
4311 }
4312
4313 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4314 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4315 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4316 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4317 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4318 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4319 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4320
4321 #define ABIDescriptor_FIELDS_DO(macro) \
4322 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4323 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4324 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4325 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4326 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4327 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4328 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4329
4330 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4331 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4332 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4333 }
4334
4335 #if INCLUDE_CDS
4336 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4337 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4338 }
4339 #endif
4340
4341 refArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4342 return oop_cast<refArrayOop>(entry->obj_field(_inputStorage_offset));
4343 }
4344
4345 refArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4346 return oop_cast<refArrayOop>(entry->obj_field(_outputStorage_offset));
4347 }
4348
4349 refArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4350 return oop_cast<refArrayOop>(entry->obj_field(_volatileStorage_offset));
4351 }
4352
4353 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4354 return entry->int_field(_stackAlignment_offset);
4355 }
4356
4357 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4358 return entry->int_field(_shadowSpace_offset);
4359 }
4360
4361 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4362 return entry->obj_field(_scratch1_offset);
4363 }
4364
4365 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4366 return entry->obj_field(_scratch2_offset);
4367 }
4368
4369 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4370 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4371 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4372 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4373
4374 #define VMStorage_FIELDS_DO(macro) \
4375 macro(_type_offset, k, "type", byte_signature, false); \
4376 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4377 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4378 macro(_debugName_offset, k, "debugName", string_signature, false); \
4379
4380 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4381 return obj != nullptr && is_subclass(obj->klass());
4382 }
4383
4384 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4385 InstanceKlass* k = vmClasses::VMStorage_klass();
4386 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4387 }
4388
4389 #if INCLUDE_CDS
4390 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4391 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4392 }
4393 #endif
4394
4395 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4396 return entry->byte_field(_type_offset);
4397 }
4398
4399 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4400 return entry->int_field(_indexOrOffset_offset);
4401 }
4402
4403 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4404 return entry->short_field(_segmentMaskOrSize_offset);
4405 }
4406
4407 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4408 return entry->obj_field(_debugName_offset);
4409 }
4410
4411 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4412 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4413
4414 #define CallConv_FIELDS_DO(macro) \
4415 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4416 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4417
4418 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4419 return obj != nullptr && is_subclass(obj->klass());
4420 }
4421
4422 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4423 InstanceKlass* k = vmClasses::CallConv_klass();
4424 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4425 }
4426
4427 #if INCLUDE_CDS
4428 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4429 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4430 }
4431 #endif
4432
4433 refArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4434 return oop_cast<refArrayOop>(entry->obj_field(_argRegs_offset));
4435 }
4436
4437 refArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4438 return oop_cast<refArrayOop>(entry->obj_field(_retRegs_offset));
4439 }
4440
4441 oop java_lang_invoke_MethodHandle::type(oop mh) {
4442 return mh->obj_field(_type_offset);
4443 }
4444
4445 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4446 mh->obj_field_put(_type_offset, mtype);
4447 }
4448
4449 oop java_lang_invoke_MethodHandle::form(oop mh) {
4450 assert(_form_offset != 0, "");
4451 return mh->obj_field(_form_offset);
4452 }
4453
4454 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4455 assert(_form_offset != 0, "");
4456 mh->obj_field_put(_form_offset, lform);
4457 }
4458
4459 /// MemberName accessors
4460
4461 oop java_lang_invoke_MemberName::clazz(oop mname) {
4462 assert(is_instance(mname), "wrong type");
4463 return mname->obj_field(_clazz_offset);
4464 }
4465
4466 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4467 assert(is_instance(mname), "wrong type");
4468 mname->obj_field_put(_clazz_offset, clazz);
4469 }
4470
4471 oop java_lang_invoke_MemberName::name(oop mname) {
4472 assert(is_instance(mname), "wrong type");
4473 return mname->obj_field(_name_offset);
4474 }
4475
4476 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4477 assert(is_instance(mname), "wrong type");
4478 mname->obj_field_put(_name_offset, name);
4479 }
4480
4481 oop java_lang_invoke_MemberName::type(oop mname) {
4482 assert(is_instance(mname), "wrong type");
4483 return mname->obj_field(_type_offset);
4484 }
4485
4486 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4487 assert(is_instance(mname), "wrong type");
4488 mname->obj_field_put(_type_offset, type);
4489 }
4490
4491 int java_lang_invoke_MemberName::flags(oop mname) {
4492 assert(is_instance(mname), "wrong type");
4493 return mname->int_field(_flags_offset);
4494 }
4495
4496 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4497 assert(is_instance(mname), "wrong type");
4498 mname->int_field_put(_flags_offset, flags);
4499 }
4500
4501 // Return vmtarget from ResolvedMethodName method field through indirection
4502 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4503 assert(is_instance(mname), "wrong type");
4504 oop method = mname->obj_field(_method_offset);
4505 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4506 }
4507
4508 bool java_lang_invoke_MemberName::is_method(oop mname) {
4509 assert(is_instance(mname), "must be MemberName");
4510 return (flags(mname) & (MN_IS_METHOD | MN_IS_OBJECT_CONSTRUCTOR)) > 0;
4511 }
4512
4513 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4514 assert(is_instance(mname), "wrong type");
4515 mname->obj_field_put(_method_offset, resolved_method);
4516 }
4517
4518 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4519 assert(is_instance(mname), "wrong type");
4520 return (intptr_t) mname->address_field(_vmindex_offset);
4521 }
4522
4523 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4524 assert(is_instance(mname), "wrong type");
4525 mname->address_field_put(_vmindex_offset, (address) index);
4526 }
4527
4528
4529 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4530 assert(is_instance(resolved_method), "wrong type");
4531 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4532 assert(m->is_method(), "must be");
4533 return m;
4534 }
4535
4536 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4537 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4538 assert(is_instance(resolved_method), "wrong type");
4539 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4540 }
4541
4542 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4543 assert(is_instance(resolved_method), "wrong type");
4544 resolved_method->obj_field_put(_vmholder_offset, holder);
4545 }
4546
4547 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4548 const Method* method = m();
4549
4550 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4551 oop resolved_method = ResolvedMethodTable::find_method(method);
4552 if (resolved_method != nullptr) {
4553 return resolved_method;
4554 }
4555
4556 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4557 if (!k->is_initialized()) {
4558 k->initialize(CHECK_NULL);
4559 }
4560
4561 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4562
4563 NoSafepointVerifier nsv;
4564
4565 if (method->is_old()) {
4566 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4567 method->get_new_method();
4568 }
4569
4570 InstanceKlass* holder = method->method_holder();
4571
4572 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4573 // Add a reference to the loader (actually mirror because hidden classes may not have
4574 // distinct loaders) to ensure the metadata is kept alive.
4575 // This mirror may be different than the one in clazz field.
4576 set_vmholder(new_resolved_method, holder->java_mirror());
4577
4578 // Set flag in class to indicate this InstanceKlass has entries in the table
4579 // to avoid walking table during redefinition if none of the redefined classes
4580 // have any membernames in the table.
4581 holder->set_has_resolved_methods();
4582
4583 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4584 }
4585
4586 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4587 assert(is_instance(lform), "wrong type");
4588 return lform->obj_field(_vmentry_offset);
4589 }
4590
4591
4592 // Support for java_lang_invoke_MethodType
4593
4594 int java_lang_invoke_MethodType::_rtype_offset;
4595 int java_lang_invoke_MethodType::_ptypes_offset;
4596
4597 #define METHODTYPE_FIELDS_DO(macro) \
4598 macro(_rtype_offset, k, "rtype", class_signature, false); \
4599 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4600
4601 void java_lang_invoke_MethodType::compute_offsets() {
4602 InstanceKlass* k = vmClasses::MethodType_klass();
4603 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4604 }
4605
4606 #if INCLUDE_CDS
4607 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4608 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4609 }
4610 #endif
4611
4612 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4613 st->print("(");
4614 refArrayOop pts = ptypes(mt);
4615 if (pts != nullptr) {
4616 for (int i = 0, limit = pts->length(); i < limit; i++) {
4617 java_lang_Class::print_signature(pts->obj_at(i), st);
4618 }
4619 } else {
4620 st->print("null");
4621 }
4622 st->print(")");
4623 oop rt = rtype(mt);
4624 if (rt != nullptr) {
4625 java_lang_Class::print_signature(rt, st);
4626 } else {
4627 st->print("null");
4628 }
4629 }
4630
4631 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4632 ResourceMark rm;
4633 stringStream buffer(128);
4634 print_signature(mt, &buffer);
4635 const char* sigstr = buffer.base();
4636 int siglen = (int) buffer.size();
4637 Symbol *name;
4638 if (!intern_if_not_found) {
4639 name = SymbolTable::probe(sigstr, siglen);
4640 } else {
4641 name = SymbolTable::new_symbol(sigstr, siglen);
4642 }
4643 return name;
4644 }
4645
4646 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4647 if (mt1 == mt2)
4648 return true;
4649 if (rtype(mt1) != rtype(mt2))
4650 return false;
4651 if (ptype_count(mt1) != ptype_count(mt2))
4652 return false;
4653 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4654 if (ptype(mt1, i) != ptype(mt2, i))
4655 return false;
4656 }
4657 return true;
4658 }
4659
4660 oop java_lang_invoke_MethodType::rtype(oop mt) {
4661 assert(is_instance(mt), "must be a MethodType");
4662 return mt->obj_field(_rtype_offset);
4663 }
4664
4665 refArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4666 assert(is_instance(mt), "must be a MethodType");
4667 return (refArrayOop) mt->obj_field(_ptypes_offset);
4668 }
4669
4670 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4671 return ptypes(mt)->obj_at(idx);
4672 }
4673
4674 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4675 return ptypes(mt)->length();
4676 }
4677
4678 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4679 refArrayOop pts = ptypes(mt);
4680 int count = pts->length();
4681 int slots = 0;
4682 for (int i = 0; i < count; i++) {
4683 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4684 slots += type2size[bt];
4685 }
4686 return slots;
4687 }
4688
4689 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4690 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4691 return type2size[bt];
4692 }
4693
4694
4695 // Support for java_lang_invoke_CallSite
4696
4697 int java_lang_invoke_CallSite::_target_offset;
4698 int java_lang_invoke_CallSite::_vmdependencies_offset;
4699 int java_lang_invoke_CallSite::_last_cleanup_offset;
4700
4701 #define CALLSITE_FIELDS_DO(macro) \
4702 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
4703
4704 void java_lang_invoke_CallSite::compute_offsets() {
4705 InstanceKlass* k = vmClasses::CallSite_klass();
4706 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4707 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4708 }
4709
4710 #if INCLUDE_CDS
4711 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4712 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4713 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4714 }
4715 #endif
4716
4717 DependencyContext java_lang_invoke_CallSite::vmdependencies(oop call_site) {
4718 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4719 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4720 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4721 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4722 return dep_ctx;
4723 }
4724
4725 // Support for java_lang_invoke_ConstantCallSite
4726
4727 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4728
4729 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4730 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4731
4732 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4733 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4734 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4735 }
4736
4737 #if INCLUDE_CDS
4738 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4739 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4740 }
4741 #endif
4742
4743 // Support for java_lang_ClassLoader
4744
4745 int java_lang_ClassLoader::_loader_data_offset;
4746 int java_lang_ClassLoader::_parallelCapable_offset;
4747 int java_lang_ClassLoader::_name_offset;
4748 int java_lang_ClassLoader::_nameAndId_offset;
4749 int java_lang_ClassLoader::_unnamedModule_offset;
4750 int java_lang_ClassLoader::_parent_offset;
4751
4752 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4753 assert(loader != nullptr, "loader must not be null");
4754 assert(oopDesc::is_oop(loader), "loader must be oop");
4755 return AtomicAccess::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4756 }
4757
4758 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4759 assert(loader != nullptr, "loader must not be null");
4760 assert(oopDesc::is_oop(loader), "loader must be oop");
4761 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4762 }
4763
4764 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4765 assert(loader != nullptr, "loader must not be null");
4766 assert(oopDesc::is_oop(loader), "loader must be oop");
4767 AtomicAccess::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4768 }
4769
4770 #define CLASSLOADER_FIELDS_DO(macro) \
4771 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4772 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4773 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
4774 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4775 macro(_parent_offset, k1, "parent", classloader_signature, false)
4776
4777 void java_lang_ClassLoader::compute_offsets() {
4778 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4779 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4780
4781 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4782 }
4783
4784 #if INCLUDE_CDS
4785 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4786 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4787 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4788 }
4789 #endif
4790
4791 oop java_lang_ClassLoader::parent(oop loader) {
4792 assert(is_instance(loader), "loader must be oop");
4793 return loader->obj_field(_parent_offset);
4794 }
4795
4796 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4797 assert(is_instance(loader), "loader must be oop");
4798 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4799 }
4800
4801 // Returns the name field of this class loader. If the name field has not
4802 // been set, null will be returned.
4803 oop java_lang_ClassLoader::name(oop loader) {
4804 assert(is_instance(loader), "loader must be oop");
4805 return loader->obj_field(_name_offset);
4806 }
4807
4808 // Returns the nameAndId field of this class loader. The format is
4809 // as follows:
4810 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4811 // If the defining loader has no name then <qualified-class-name> @<id>
4812 // If built-in loader, then omit '@<id>' as there is only one instance.
4813 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4814 oop java_lang_ClassLoader::nameAndId(oop loader) {
4815 assert(is_instance(loader), "loader must be oop");
4816 return loader->obj_field(_nameAndId_offset);
4817 }
4818
4819 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4820 assert(is_instance(loader), "loader must be oop");
4821 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4822 oop acl = loader;
4823 DEBUG_ONLY(jint loop_count = 0);
4824 // This loop taken verbatim from ClassLoader.java:
4825 do {
4826 acl = parent(acl);
4827 if (cl == acl) {
4828 return true;
4829 }
4830 assert(++loop_count > 0, "loop_count overflow");
4831 } while (acl != nullptr);
4832 return false;
4833 }
4834
4835 bool java_lang_ClassLoader::is_instance(oop obj) {
4836 return obj != nullptr && is_subclass(obj->klass());
4837 }
4838
4839
4840 // For class loader classes, parallelCapable defined
4841 // based on non-null field
4842 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4843 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4844 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4845 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4846 }
4847
4848 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4849 oop cl = SystemDictionary::java_system_loader();
4850 while(cl != nullptr) {
4851 if (cl == loader) return true;
4852 cl = parent(cl);
4853 }
4854 return false;
4855 }
4856
4857 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4858 assert(is_instance(loader), "loader must be oop");
4859 return loader->obj_field(_unnamedModule_offset);
4860 }
4861
4862 // Support for java_lang_System
4863 //
4864
4865 int java_lang_System::_static_in_offset;
4866 int java_lang_System::_static_out_offset;
4867 int java_lang_System::_static_err_offset;
4868
4869 #define SYSTEM_FIELDS_DO(macro) \
4870 macro(_static_in_offset, k, "in", input_stream_signature, true); \
4871 macro(_static_out_offset, k, "out", print_stream_signature, true); \
4872 macro(_static_err_offset, k, "err", print_stream_signature, true);
4873
4874 void java_lang_System::compute_offsets() {
4875 InstanceKlass* k = vmClasses::System_klass();
4876 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4877 }
4878
4879 #if INCLUDE_CDS
4880 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4881 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4882 }
4883 #endif
4884
4885 // Support for jdk_internal_misc_UnsafeConstants
4886 //
4887 class UnsafeConstantsFixup : public FieldClosure {
4888 private:
4889 int _address_size;
4890 int _page_size;
4891 bool _big_endian;
4892 bool _use_unaligned_access;
4893 int _data_cache_line_flush_size;
4894 public:
4895 UnsafeConstantsFixup() {
4896 // round up values for all static final fields
4897 _address_size = sizeof(void*);
4898 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4899 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4900 _use_unaligned_access = UseUnalignedAccesses;
4901 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4902 }
4903
4904 void do_field(fieldDescriptor* fd) {
4905 oop mirror = fd->field_holder()->java_mirror();
4906 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4907 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4908 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4909 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4910 if (fd->name() == vmSymbols::address_size_name()) {
4911 mirror->int_field_put(fd->offset(), _address_size);
4912 } else if (fd->name() == vmSymbols::page_size_name()) {
4913 mirror->int_field_put(fd->offset(), _page_size);
4914 } else if (fd->name() == vmSymbols::big_endian_name()) {
4915 mirror->bool_field_put(fd->offset(), _big_endian);
4916 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4917 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4918 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4919 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4920 } else {
4921 assert(false, "unexpected UnsafeConstants field");
4922 }
4923 }
4924 };
4925
4926 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4927 UnsafeConstantsFixup fixup;
4928 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4929 }
4930
4931
4932 // java_lang_StackTraceElement
4933
4934 int java_lang_StackTraceElement::_methodName_offset;
4935 int java_lang_StackTraceElement::_fileName_offset;
4936 int java_lang_StackTraceElement::_lineNumber_offset;
4937 int java_lang_StackTraceElement::_moduleName_offset;
4938 int java_lang_StackTraceElement::_moduleVersion_offset;
4939 int java_lang_StackTraceElement::_classLoaderName_offset;
4940 int java_lang_StackTraceElement::_declaringClass_offset;
4941 int java_lang_StackTraceElement::_declaringClassObject_offset;
4942
4943 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4944 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4945 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4946 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
4947 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4948 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
4949 macro(_methodName_offset, k, "methodName", string_signature, false); \
4950 macro(_fileName_offset, k, "fileName", string_signature, false); \
4951 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
4952
4953 // Support for java_lang_StackTraceElement
4954 void java_lang_StackTraceElement::compute_offsets() {
4955 InstanceKlass* k = vmClasses::StackTraceElement_klass();
4956 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4957 }
4958
4959 #if INCLUDE_CDS
4960 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4961 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4962 }
4963 #endif
4964
4965 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4966 element->obj_field_put(_fileName_offset, value);
4967 }
4968
4969 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4970 element->obj_field_put(_declaringClass_offset, value);
4971 }
4972
4973 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4974 element->obj_field_put(_methodName_offset, value);
4975 }
4976
4977 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4978 element->int_field_put(_lineNumber_offset, value);
4979 }
4980
4981 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4982 element->obj_field_put(_moduleName_offset, value);
4983 }
4984
4985 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4986 element->obj_field_put(_moduleVersion_offset, value);
4987 }
4988
4989 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4990 element->obj_field_put(_classLoaderName_offset, value);
4991 }
4992
4993 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4994 element->obj_field_put(_declaringClassObject_offset, value);
4995 }
4996
4997
4998 // java_lang_AssertionStatusDirectives
4999
5000 int java_lang_AssertionStatusDirectives::_classes_offset;
5001 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
5002 int java_lang_AssertionStatusDirectives::_packages_offset;
5003 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
5004 int java_lang_AssertionStatusDirectives::_deflt_offset;
5005
5006 // Support for java Assertions - java_lang_AssertionStatusDirectives.
5007 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
5008 macro(_classes_offset, k, "classes", string_array_signature, false); \
5009 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
5010 macro(_packages_offset, k, "packages", string_array_signature, false); \
5011 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
5012 macro(_deflt_offset, k, "deflt", bool_signature, false)
5013
5014 void java_lang_AssertionStatusDirectives::compute_offsets() {
5015 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
5016 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5017 }
5018
5019 #if INCLUDE_CDS
5020 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
5021 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5022 }
5023 #endif
5024
5025 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
5026 o->obj_field_put(_classes_offset, val);
5027 }
5028
5029 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
5030 o->obj_field_put(_classEnabled_offset, val);
5031 }
5032
5033 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
5034 o->obj_field_put(_packages_offset, val);
5035 }
5036
5037 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
5038 o->obj_field_put(_packageEnabled_offset, val);
5039 }
5040
5041 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
5042 o->bool_field_put(_deflt_offset, val);
5043 }
5044
5045 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
5046
5047 #define AOS_FIELDS_DO(macro) \
5048 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
5049
5050 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
5051 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
5052 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5053 }
5054
5055 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
5056 assert(_owner_offset != 0, "Must be initialized");
5057 return obj->obj_field(_owner_offset);
5058 }
5059
5060 #if INCLUDE_CDS
5061 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
5062 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5063 }
5064 #endif
5065
5066 int vector_VectorPayload::_payload_offset;
5067
5068 #define VECTORPAYLOAD_FIELDS_DO(macro) \
5069 macro(_payload_offset, k, "payload", object_signature, false)
5070
5071 void vector_VectorPayload::compute_offsets() {
5072 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
5073 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5074 }
5075
5076 #if INCLUDE_CDS
5077 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
5078 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5079 }
5080 #endif
5081
5082 void vector_VectorPayload::set_payload(oop o, oop val) {
5083 o->obj_field_put(_payload_offset, val);
5084 }
5085
5086 bool vector_VectorPayload::is_instance(oop obj) {
5087 return obj != nullptr && is_subclass(obj->klass());
5088 }
5089
5090 int java_lang_Integer_IntegerCache::_static_cache_offset;
5091 int java_lang_Long_LongCache::_static_cache_offset;
5092 int java_lang_Character_CharacterCache::_static_cache_offset;
5093 int java_lang_Short_ShortCache::_static_cache_offset;
5094 int java_lang_Byte_ByteCache::_static_cache_offset;
5095
5096 #define INTEGER_CACHE_FIELDS_DO(macro) \
5097 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5098
5099 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5100 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5101 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5102 }
5103
5104 refArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5105 oop base = ik->static_field_base_raw();
5106 return refArrayOop(base->obj_field(_static_cache_offset));
5107 }
5108
5109 Symbol* java_lang_Integer_IntegerCache::symbol() {
5110 return vmSymbols::java_lang_Integer_IntegerCache();
5111 }
5112
5113 #if INCLUDE_CDS
5114 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5115 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5116 }
5117 #endif
5118 #undef INTEGER_CACHE_FIELDS_DO
5119
5120 #define LONG_CACHE_FIELDS_DO(macro) \
5121 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5122
5123 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5124 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5125 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5126 }
5127
5128 refArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5129 oop base = ik->static_field_base_raw();
5130 return refArrayOop(base->obj_field(_static_cache_offset));
5131 }
5132
5133 Symbol* java_lang_Long_LongCache::symbol() {
5134 return vmSymbols::java_lang_Long_LongCache();
5135 }
5136
5137 #if INCLUDE_CDS
5138 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5139 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5140 }
5141 #endif
5142 #undef LONG_CACHE_FIELDS_DO
5143
5144 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5145 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5146
5147 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5148 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5149 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5150 }
5151
5152 refArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5153 oop base = ik->static_field_base_raw();
5154 return refArrayOop(base->obj_field(_static_cache_offset));
5155 }
5156
5157 Symbol* java_lang_Character_CharacterCache::symbol() {
5158 return vmSymbols::java_lang_Character_CharacterCache();
5159 }
5160
5161 #if INCLUDE_CDS
5162 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5163 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5164 }
5165 #endif
5166 #undef CHARACTER_CACHE_FIELDS_DO
5167
5168 #define SHORT_CACHE_FIELDS_DO(macro) \
5169 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5170
5171 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5172 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5173 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5174 }
5175
5176 refArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5177 oop base = ik->static_field_base_raw();
5178 return refArrayOop(base->obj_field(_static_cache_offset));
5179 }
5180
5181 Symbol* java_lang_Short_ShortCache::symbol() {
5182 return vmSymbols::java_lang_Short_ShortCache();
5183 }
5184
5185 #if INCLUDE_CDS
5186 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5187 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5188 }
5189 #endif
5190 #undef SHORT_CACHE_FIELDS_DO
5191
5192 #define BYTE_CACHE_FIELDS_DO(macro) \
5193 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5194
5195 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5196 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5197 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5198 }
5199
5200 refArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5201 oop base = ik->static_field_base_raw();
5202 return refArrayOop(base->obj_field(_static_cache_offset));
5203 }
5204
5205 Symbol* java_lang_Byte_ByteCache::symbol() {
5206 return vmSymbols::java_lang_Byte_ByteCache();
5207 }
5208
5209 #if INCLUDE_CDS
5210 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5211 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5212 }
5213 #endif
5214 #undef BYTE_CACHE_FIELDS_DO
5215
5216 int java_lang_Boolean::_static_TRUE_offset;
5217 int java_lang_Boolean::_static_FALSE_offset;
5218
5219 #define BOOLEAN_FIELDS_DO(macro) \
5220 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5221 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5222
5223
5224 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5225 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5226 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5227 }
5228
5229 Symbol* java_lang_Boolean::symbol() {
5230 return vmSymbols::java_lang_Boolean();
5231 }
5232
5233 #if INCLUDE_CDS
5234 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5235 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5236 }
5237 #endif
5238 #undef BOOLEAN_CACHE_FIELDS_DO
5239
5240 // java_lang_reflect_RecordComponent
5241
5242 int java_lang_reflect_RecordComponent::_clazz_offset;
5243 int java_lang_reflect_RecordComponent::_name_offset;
5244 int java_lang_reflect_RecordComponent::_type_offset;
5245 int java_lang_reflect_RecordComponent::_accessor_offset;
5246 int java_lang_reflect_RecordComponent::_signature_offset;
5247 int java_lang_reflect_RecordComponent::_annotations_offset;
5248 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5249
5250 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5251 macro(_clazz_offset, k, "clazz", class_signature, false); \
5252 macro(_name_offset, k, "name", string_signature, false); \
5253 macro(_type_offset, k, "type", class_signature, false); \
5254 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5255 macro(_signature_offset, k, "signature", string_signature, false); \
5256 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5257 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5258
5259 // Support for java_lang_reflect_RecordComponent
5260 void java_lang_reflect_RecordComponent::compute_offsets() {
5261 InstanceKlass* k = vmClasses::RecordComponent_klass();
5262 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5263 }
5264
5265 #if INCLUDE_CDS
5266 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5267 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5268 }
5269 #endif
5270
5271 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5272 element->obj_field_put(_clazz_offset, value);
5273 }
5274
5275 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5276 element->obj_field_put(_name_offset, value);
5277 }
5278
5279 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5280 element->obj_field_put(_type_offset, value);
5281 }
5282
5283 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5284 element->obj_field_put(_accessor_offset, value);
5285 }
5286
5287 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5288 element->obj_field_put(_signature_offset, value);
5289 }
5290
5291 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5292 element->obj_field_put(_annotations_offset, value);
5293 }
5294
5295 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5296 element->obj_field_put(_typeAnnotations_offset, value);
5297 }
5298
5299 // java_lang_InternalError
5300 int java_lang_InternalError::_during_unsafe_access_offset;
5301
5302 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5303 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5304 }
5305
5306 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5307 return internal_error->bool_field(_during_unsafe_access_offset);
5308 }
5309
5310 void java_lang_InternalError::compute_offsets() {
5311 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5312 }
5313
5314 #if INCLUDE_CDS
5315 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5316 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5317 }
5318 #endif
5319
5320 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5321 f(java_lang_Class) \
5322 f(java_lang_String) \
5323 f(java_lang_ref_Reference) \
5324 //end
5325
5326 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5327 f(java_lang_System) \
5328 f(java_lang_ClassLoader) \
5329 f(java_lang_Throwable) \
5330 f(java_lang_Thread) \
5331 f(java_lang_Thread_FieldHolder) \
5332 f(java_lang_Thread_Constants) \
5333 f(java_lang_ThreadGroup) \
5334 f(java_lang_VirtualThread) \
5335 f(java_lang_InternalError) \
5336 f(java_lang_AssertionStatusDirectives) \
5337 f(java_lang_ref_SoftReference) \
5338 f(java_lang_invoke_MethodHandle) \
5339 f(java_lang_invoke_DirectMethodHandle) \
5340 f(java_lang_invoke_MemberName) \
5341 f(java_lang_invoke_ResolvedMethodName) \
5342 f(java_lang_invoke_LambdaForm) \
5343 f(java_lang_invoke_MethodType) \
5344 f(java_lang_invoke_CallSite) \
5345 f(java_lang_invoke_ConstantCallSite) \
5346 f(java_lang_reflect_AccessibleObject) \
5347 f(java_lang_reflect_Method) \
5348 f(java_lang_reflect_Constructor) \
5349 f(java_lang_reflect_Field) \
5350 f(java_lang_reflect_RecordComponent) \
5351 f(reflect_ConstantPool) \
5352 f(java_lang_reflect_Parameter) \
5353 f(java_lang_Module) \
5354 f(java_lang_StackTraceElement) \
5355 f(java_lang_ClassFrameInfo) \
5356 f(java_lang_StackFrameInfo) \
5357 f(java_lang_LiveStackFrameInfo) \
5358 f(jdk_internal_vm_ContinuationScope) \
5359 f(jdk_internal_vm_Continuation) \
5360 f(jdk_internal_vm_StackChunk) \
5361 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5362 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5363 f(jdk_internal_foreign_abi_ABIDescriptor) \
5364 f(jdk_internal_foreign_abi_VMStorage) \
5365 f(jdk_internal_foreign_abi_CallConv) \
5366 f(jdk_internal_misc_UnsafeConstants) \
5367 f(java_lang_boxing_object) \
5368 f(vector_VectorPayload) \
5369 //end
5370
5371 #define BASIC_JAVA_CLASSES_DO(f) \
5372 BASIC_JAVA_CLASSES_DO_PART1(f) \
5373 BASIC_JAVA_CLASSES_DO_PART2(f)
5374
5375 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5376
5377 // Compute field offsets of all the classes in this file
5378 void JavaClasses::compute_offsets() {
5379 if (CDSConfig::is_using_archive()) {
5380 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5381 JvmtiExport::has_early_class_hook_env()),
5382 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5383 // None of the classes used by the rest of this function can be replaced by
5384 // JVMTI ClassFileLoadHook.
5385 // We are safe to use the archived offsets, which have already been restored
5386 // by JavaClasses::serialize_offsets, without computing the offsets again.
5387 return;
5388 }
5389
5390 // We have already called the compute_offsets() of the
5391 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5392 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5393 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5394 }
5395
5396 #if INCLUDE_CDS
5397 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5398
5399 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5400 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5401 }
5402 #endif
5403
5404 #if INCLUDE_CDS_JAVA_HEAP
5405 bool JavaClasses::is_supported_for_archiving(oop obj) {
5406 Klass* klass = obj->klass();
5407
5408 if (!CDSConfig::is_dumping_method_handles()) {
5409 // These are supported by CDS only when CDSConfig::is_dumping_method_handles() is enabled.
5410 if (klass == vmClasses::ResolvedMethodName_klass() ||
5411 klass == vmClasses::MemberName_klass()) {
5412 return false;
5413 }
5414 }
5415
5416 if (!AOTReferenceObjSupport::is_enabled() && klass->is_subclass_of(vmClasses::Reference_klass())) {
5417 return false;
5418 }
5419
5420 return true;
5421 }
5422 #endif
5423
5424 #ifndef PRODUCT
5425
5426 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5427
5428 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5429 const char* field_sig) {
5430 EXCEPTION_MARK;
5431 fieldDescriptor fd;
5432 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5433 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5434 InstanceKlass* ik = InstanceKlass::cast(k);
5435 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5436 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5437 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5438 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5439 return false;
5440 }
5441 if (fd.is_static()) {
5442 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5443 return false;
5444 }
5445 if (fd.offset() == deserialized_offset ) {
5446 return true;
5447 } else {
5448 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5449 klass_name, field_name, deserialized_offset, fd.offset());
5450 return false;
5451 }
5452 }
5453
5454 void JavaClasses::check_offsets() {
5455 bool valid = true;
5456
5457 #define CHECK_OFFSET(klass_name, type, field_sig) \
5458 valid &= check_offset(klass_name, java_lang_boxing_object::value_offset(type), "value", field_sig)
5459
5460 CHECK_OFFSET("java/lang/Boolean", T_BOOLEAN, "Z");
5461 CHECK_OFFSET("java/lang/Character", T_CHAR, "C");
5462 CHECK_OFFSET("java/lang/Float", T_FLOAT, "F");
5463 CHECK_OFFSET("java/lang/Double", T_DOUBLE, "D");
5464 CHECK_OFFSET("java/lang/Byte", T_BYTE, "B");
5465 CHECK_OFFSET("java/lang/Short", T_SHORT, "S");
5466 CHECK_OFFSET("java/lang/Integer", T_INT, "I");
5467 CHECK_OFFSET("java/lang/Long", T_LONG, "J");
5468
5469 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5470 }
5471
5472 #endif // PRODUCT
5473
5474 int InjectedField::compute_offset() {
5475 InstanceKlass* ik = klass();
5476 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5477 if (!may_be_java && !fs.field_flags().is_injected()) {
5478 // Only look at injected fields
5479 continue;
5480 }
5481 if (fs.name() == name() && fs.signature() == signature()) {
5482 return fs.offset();
5483 }
5484 }
5485 ResourceMark rm;
5486 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)" : "");
5487 #ifndef PRODUCT
5488 ik->print();
5489 tty->print_cr("all fields:");
5490 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5491 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());
5492 }
5493 #endif //PRODUCT
5494 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5495 return -1;
5496 }
5497
5498 void javaClasses_init() {
5499 JavaClasses::compute_offsets();
5500 JavaClasses::check_offsets();
5501 }