1 /*
2 * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "cds/aotMetaspace.hpp"
26 #include "cds/aotReferenceObjSupport.hpp"
27 #include "cds/archiveBuilder.hpp"
28 #include "cds/archiveHeapLoader.hpp"
29 #include "cds/cdsConfig.hpp"
30 #include "cds/heapShared.hpp"
31 #include "classfile/altHashing.hpp"
32 #include "classfile/classLoaderData.inline.hpp"
33 #include "classfile/javaClasses.inline.hpp"
34 #include "classfile/javaClassesImpl.hpp"
35 #include "classfile/javaThreadStatus.hpp"
36 #include "classfile/moduleEntry.hpp"
37 #include "classfile/stringTable.hpp"
38 #include "classfile/symbolTable.hpp"
39 #include "classfile/systemDictionary.hpp"
40 #include "classfile/vmClasses.hpp"
41 #include "classfile/vmSymbols.hpp"
42 #include "code/debugInfo.hpp"
43 #include "code/dependencyContext.hpp"
44 #include "code/pcDesc.hpp"
45 #include "gc/shared/collectedHeap.inline.hpp"
46 #include "interpreter/interpreter.hpp"
47 #include "interpreter/linkResolver.hpp"
48 #include "jvm.h"
49 #include "logging/log.hpp"
50 #include "logging/logStream.hpp"
51 #include "memory/oopFactory.hpp"
52 #include "memory/resourceArea.hpp"
53 #include "memory/universe.hpp"
54 #include "oops/fieldInfo.hpp"
55 #include "oops/fieldStreams.inline.hpp"
56 #include "oops/flatArrayKlass.hpp"
57 #include "oops/inlineKlass.inline.hpp"
58 #include "oops/instanceKlass.inline.hpp"
59 #include "oops/instanceMirrorKlass.inline.hpp"
60 #include "oops/klass.inline.hpp"
61 #include "oops/method.inline.hpp"
62 #include "oops/objArrayKlass.hpp"
63 #include "oops/objArrayOop.inline.hpp"
64 #include "oops/oop.inline.hpp"
65 #include "oops/oopCast.inline.hpp"
66 #include "oops/recordComponent.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 #if INCLUDE_JVMCI
96 #include "jvmci/jvmciJavaClasses.hpp"
97 #endif
98
99 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
100 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
101
102 InjectedField JavaClasses::_injected_fields[] = {
103 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
104 };
105
106 // Register native methods of Object
107 void java_lang_Object::register_natives(TRAPS) {
108 InstanceKlass* obj = vmClasses::Object_klass();
109 Method::register_native(obj, vmSymbols::hashCode_name(),
110 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
111 Method::register_native(obj, vmSymbols::wait_name(),
112 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
113 Method::register_native(obj, vmSymbols::notify_name(),
114 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
115 Method::register_native(obj, vmSymbols::notifyAll_name(),
116 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
117 Method::register_native(obj, vmSymbols::clone_name(),
118 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
119 }
120
121 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
122 return _injected_fields[(int)id].compute_offset();
123 }
124
125 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
126 *field_count = 0;
127
128 vmSymbolID sid = vmSymbols::find_sid(class_name);
129 if (sid == vmSymbolID::NO_SID) {
130 // Only well known classes can inject fields
131 return nullptr;
132 }
133
134 int count = 0;
135 int start = -1;
136
137 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
138 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \
139 count++; \
140 if (start == -1) { \
141 start = (int)InjectedFieldID::klass##_##name##_enum; \
142 } \
143 }
144 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
145 #undef LOOKUP_INJECTED_FIELD
146
147 if (start != -1) {
148 *field_count = count;
149 return _injected_fields + start;
150 }
151 return nullptr;
152 }
153
154
155 // Helpful routine for computing field offsets at run time rather than hardcoding them
156 // Finds local fields only, including static fields. Static field offsets are from the
157 // beginning of the mirror.
158 void JavaClasses::compute_offset(int &dest_offset,
159 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
160 bool is_static) {
161 fieldDescriptor fd;
162 if (ik == nullptr) {
163 ResourceMark rm;
164 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
165 vm_exit_during_initialization("Invalid layout of well-known class");
166 }
167
168 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
169 ResourceMark rm;
170 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
171 name_symbol->as_C_string(), signature_symbol->as_C_string());
172 #ifndef PRODUCT
173 // Prints all fields and offsets
174 Log(class) lt;
175 LogStream ls(lt.error());
176 ik->print_on(&ls);
177 #endif //PRODUCT
178 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
179 }
180 dest_offset = fd.offset();
181 }
182
183 // Overloading to pass name as a string.
184 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
185 const char* name_string, Symbol* signature_symbol,
186 bool is_static) {
187 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
188 if (name == nullptr) {
189 ResourceMark rm;
190 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
191 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
192 }
193 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
194 }
195
196 // java_lang_String
197
198 int java_lang_String::_value_offset;
199 int java_lang_String::_hash_offset;
200 int java_lang_String::_hashIsZero_offset;
201 int java_lang_String::_coder_offset;
202 int java_lang_String::_flags_offset;
203
204 bool java_lang_String::_initialized;
205
206
207 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
208 uint8_t* addr = flags_addr(java_string);
209 uint8_t value = AtomicAccess::load(addr);
210 while ((value & flag_mask) == 0) {
211 uint8_t old_value = value;
212 value |= flag_mask;
213 value = AtomicAccess::cmpxchg(addr, old_value, value);
214 if (value == old_value) return false; // Flag bit changed from 0 to 1.
215 }
216 return true; // Flag bit is already 1.
217 }
218
219 #define STRING_FIELDS_DO(macro) \
220 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
221 macro(_hash_offset, k, "hash", int_signature, false); \
222 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
223 macro(_coder_offset, k, "coder", byte_signature, false);
224
225 void java_lang_String::compute_offsets() {
226 if (_initialized) {
227 return;
228 }
229
230 InstanceKlass* k = vmClasses::String_klass();
231 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
232 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
233
234 _initialized = true;
235 }
236
237 #if INCLUDE_CDS
238 void java_lang_String::serialize_offsets(SerializeClosure* f) {
239 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
240 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
241 f->do_bool(&_initialized);
242 }
243 #endif
244
245 class CompactStringsFixup : public FieldClosure {
246 private:
247 bool _value;
248
249 public:
250 CompactStringsFixup(bool value) : _value(value) {}
251
252 void do_field(fieldDescriptor* fd) {
253 if (fd->name() == vmSymbols::compact_strings_name()) {
254 oop mirror = fd->field_holder()->java_mirror();
255 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String");
256 assert(mirror != nullptr, "String must have mirror already");
257 mirror->bool_field_put(fd->offset(), _value);
258 }
259 }
260 };
261
262 void java_lang_String::set_compact_strings(bool value) {
263 CompactStringsFixup fix(value);
264 vmClasses::String_klass()->do_local_static_fields(&fix);
265 }
266
267 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
268 assert(_initialized, "Must be initialized");
269 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
270
271 // Create the String object first, so there's a chance that the String
272 // and the char array it points to end up in the same cache line.
273 oop obj;
274 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH);
275
276 // Create the char array. The String object must be handlized here
277 // because GC can happen as a result of the allocation attempt.
278 Handle h_obj(THREAD, obj);
279 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
280 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
281
282 // Point the String at the char array
283 obj = h_obj();
284 set_value(obj, buffer);
285 // No need to zero the offset, allocation zero'ed the entire String object
286 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
287 return h_obj;
288 }
289
290 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
291 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
292 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
293 typeArrayOop buffer = value(h_obj());
294 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
295 if (is_latin1) {
296 for (int index = 0; index < length; index++) {
297 buffer->byte_at_put(index, (jbyte)unicode[index]);
298 }
299 } else {
300 for (int index = 0; index < length; index++) {
301 buffer->char_at_put(index, unicode[index]);
302 }
303 }
304
305 #ifdef ASSERT
306 {
307 ResourceMark rm;
308 size_t utf8_len = static_cast<size_t>(length);
309 char* expected = UNICODE::as_utf8(unicode, utf8_len);
310 char* actual = as_utf8_string(h_obj());
311 if (strcmp(expected, actual) != 0) {
312 fatal("Unicode conversion failure: %s --> %s", expected, actual);
313 }
314 }
315 #endif
316
317 return h_obj;
318 }
319
320 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
321 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
322 return h_obj();
323 }
324
325 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
326 if (utf8_str == nullptr) {
327 return Handle();
328 }
329 bool has_multibyte, is_latin1;
330 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
331 if (!CompactStrings) {
332 has_multibyte = true;
333 is_latin1 = false;
334 }
335
336 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
337 if (length > 0) {
338 if (!has_multibyte) {
339 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
340 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
341 } else if (is_latin1) {
342 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
343 } else {
344 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
345 }
346 }
347
348 #ifdef ASSERT
349 // This check is too strict when the input string is not a valid UTF8.
350 // For example, it may be created with arbitrary content via jni_NewStringUTF.
351 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, strlen(utf8_str), /*version_leq_47*/false)) {
352 ResourceMark rm;
353 const char* expected = utf8_str;
354 char* actual = as_utf8_string(h_obj());
355 if (strcmp(expected, actual) != 0) {
356 fatal("String conversion failure: %s --> %s", expected, actual);
357 }
358 }
359 #endif
360
361 return h_obj;
362 }
363
364 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
365 Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
366 return h_obj();
367 }
368
369 Handle java_lang_String::create_from_symbol(const Symbol* symbol, TRAPS) {
370 const char* utf8_str = (char*)symbol->bytes();
371 int utf8_len = symbol->utf8_length();
372
373 bool has_multibyte, is_latin1;
374 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
375 if (!CompactStrings) {
376 has_multibyte = true;
377 is_latin1 = false;
378 }
379
380 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
381 if (length > 0) {
382 if (!has_multibyte) {
383 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
384 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
385 } else if (is_latin1) {
386 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
387 } else {
388 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
389 }
390 }
391
392 #ifdef ASSERT
393 // This check is too strict on older classfile versions
394 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, utf8_len, /*version_leq_47*/false))
395 {
396 ResourceMark rm;
397 const char* expected = symbol->as_utf8();
398 char* actual = as_utf8_string(h_obj());
399 if (strncmp(expected, actual, utf8_len) != 0) {
400 fatal("Symbol conversion failure: %s --> %s", expected, actual);
401 }
402 }
403 #endif
404
405 return h_obj;
406 }
407
408 // Converts a C string to a Java String based on current encoding
409 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
410 assert(str != nullptr, "bad arguments");
411
412 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
413 static to_java_string_fn_t _to_java_string_fn = nullptr;
414
415 if (_to_java_string_fn == nullptr) {
416 void *lib_handle = os::native_java_library();
417 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
418 if (_to_java_string_fn == nullptr) {
419 fatal("JNU_NewStringPlatform missing");
420 }
421 }
422
423 jstring js = nullptr;
424 {
425 JavaThread* thread = THREAD;
426 HandleMark hm(thread);
427 ThreadToNativeFromVM ttn(thread);
428 js = (_to_java_string_fn)(thread->jni_environment(), str);
429 }
430
431 Handle native_platform_string(THREAD, JNIHandles::resolve(js));
432 JNIHandles::destroy_local(js); // destroy local JNIHandle.
433 return native_platform_string;
434 }
435
436 // Converts a Java String to a native C string that can be used for
437 // native OS calls.
438 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
439 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
440 static to_platform_string_fn_t _to_platform_string_fn = nullptr;
441
442 if (_to_platform_string_fn == nullptr) {
443 void *lib_handle = os::native_java_library();
444 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
445 if (_to_platform_string_fn == nullptr) {
446 fatal("GetStringPlatformChars missing");
447 }
448 }
449
450 char *native_platform_string;
451 jstring js;
452 { JavaThread* thread = THREAD;
453 js = (jstring) JNIHandles::make_local(thread, java_string());
454 HandleMark hm(thread);
455 ThreadToNativeFromVM ttn(thread);
456 JNIEnv *env = thread->jni_environment();
457 bool is_copy;
458 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
459 assert(is_copy == JNI_TRUE, "is_copy value changed");
460 }
461
462 // Uses a store barrier and therefore needs to be in vm state
463 JNIHandles::destroy_local(js);
464
465 return native_platform_string;
466 }
467
468 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
469 ResourceMark rm(THREAD);
470 return create_from_str(java_name->as_klass_external_name(), THREAD);
471 }
472
473 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
474 jchar* result = as_unicode_string_or_null(java_string, length);
475 if (result == nullptr) {
476 THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
477 }
478 return result;
479 }
480
481 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
482 typeArrayOop value = java_lang_String::value(java_string);
483 length = java_lang_String::length(java_string, value);
484 bool is_latin1 = java_lang_String::is_latin1(java_string);
485
486 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
487 if (result != nullptr) {
488 if (!is_latin1) {
489 for (int index = 0; index < length; index++) {
490 result[index] = value->char_at(index);
491 }
492 } else {
493 for (int index = 0; index < length; index++) {
494 result[index] = ((jchar) value->byte_at(index)) & 0xff;
495 }
496 }
497 }
498 return result;
499 }
500
501 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
502 // The hash and hashIsZero fields are subject to a benign data race,
503 // making it crucial to ensure that any observable result of the
504 // calculation in this method stays correct under any possible read of
505 // these fields. Necessary restrictions to allow this to be correct
506 // without explicit memory fences or similar concurrency primitives is
507 // that we can ever only write to one of these two fields for a given
508 // String instance, and that the computation is idempotent and derived
509 // from immutable state
510 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
511 if (java_lang_String::hash_is_set(java_string)) {
512 return java_string->int_field(_hash_offset);
513 }
514
515 typeArrayOop value = java_lang_String::value(java_string);
516 int length = java_lang_String::length(java_string, value);
517 bool is_latin1 = java_lang_String::is_latin1(java_string);
518
519 unsigned int hash = 0;
520 if (length > 0) {
521 if (is_latin1) {
522 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
523 } else {
524 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
525 }
526 }
527
528 if (update) {
529 if (hash != 0) {
530 java_string->int_field_put(_hash_offset, hash);
531 } else {
532 java_string->bool_field_put(_hashIsZero_offset, true);
533 }
534 }
535 return hash;
536 }
537
538 unsigned int java_lang_String::hash_code(oop java_string) {
539 return hash_code_impl(java_string, /*update=*/true);
540 }
541
542 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
543 return hash_code_impl(java_string, /*update=*/false);
544 }
545
546
547 char* java_lang_String::as_quoted_ascii(oop java_string) {
548 typeArrayOop value = java_lang_String::value(java_string);
549 int length = java_lang_String::length(java_string, value);
550 bool is_latin1 = java_lang_String::is_latin1(java_string);
551
552 if (length == 0) return nullptr;
553
554 char* result;
555 size_t result_length;
556 if (!is_latin1) {
557 jchar* base = value->char_at_addr(0);
558 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
559 result = NEW_RESOURCE_ARRAY(char, result_length);
560 UNICODE::as_quoted_ascii(base, length, result, result_length);
561 } else {
562 jbyte* base = value->byte_at_addr(0);
563 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
564 result = NEW_RESOURCE_ARRAY(char, result_length);
565 UNICODE::as_quoted_ascii(base, length, result, result_length);
566 }
567 assert(result_length >= (size_t)length + 1, "must not be shorter");
568 assert(result_length == strlen(result) + 1, "must match");
569 return result;
570 }
571
572 Symbol* java_lang_String::as_symbol(oop java_string) {
573 typeArrayOop value = java_lang_String::value(java_string);
574 int length = java_lang_String::length(java_string, value);
575 bool is_latin1 = java_lang_String::is_latin1(java_string);
576 if (!is_latin1) {
577 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
578 Symbol* sym = SymbolTable::new_symbol(base, length);
579 return sym;
580 } else {
581 ResourceMark rm;
582 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
583 size_t utf8_len = static_cast<size_t>(length);
584 const char* base = UNICODE::as_utf8(position, utf8_len);
585 Symbol* sym = SymbolTable::new_symbol(base, checked_cast<int>(utf8_len));
586 return sym;
587 }
588 }
589
590 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
591 typeArrayOop value = java_lang_String::value(java_string);
592 int length = java_lang_String::length(java_string, value);
593 bool is_latin1 = java_lang_String::is_latin1(java_string);
594 if (!is_latin1) {
595 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
596 return SymbolTable::probe_unicode(base, length);
597 } else {
598 ResourceMark rm;
599 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
600 size_t utf8_len = static_cast<size_t>(length);
601 const char* base = UNICODE::as_utf8(position, utf8_len);
602 return SymbolTable::probe(base, checked_cast<int>(utf8_len));
603 }
604 }
605
606 size_t java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
607 assert(value_equals(value, java_lang_String::value(java_string)),
608 "value must be same as java_lang_String::value(java_string)");
609 int length = java_lang_String::length(java_string, value);
610 if (length == 0) {
611 return 0;
612 }
613 if (!java_lang_String::is_latin1(java_string)) {
614 return UNICODE::utf8_length(value->char_at_addr(0), length);
615 } else {
616 return UNICODE::utf8_length(value->byte_at_addr(0), length);
617 }
618 }
619
620 size_t java_lang_String::utf8_length(oop java_string) {
621 typeArrayOop value = java_lang_String::value(java_string);
622 return utf8_length(java_string, value);
623 }
624
625 int java_lang_String::utf8_length_as_int(oop java_string) {
626 typeArrayOop value = java_lang_String::value(java_string);
627 return utf8_length_as_int(java_string, value);
628 }
629
630 int java_lang_String::utf8_length_as_int(oop java_string, typeArrayOop value) {
631 assert(value_equals(value, java_lang_String::value(java_string)),
632 "value must be same as java_lang_String::value(java_string)");
633 int length = java_lang_String::length(java_string, value);
634 if (length == 0) {
635 return 0;
636 }
637 if (!java_lang_String::is_latin1(java_string)) {
638 return UNICODE::utf8_length_as_int(value->char_at_addr(0), length);
639 } else {
640 return UNICODE::utf8_length_as_int(value->byte_at_addr(0), length);
641 }
642 }
643
644 char* java_lang_String::as_utf8_string(oop java_string) {
645 size_t length;
646 return as_utf8_string(java_string, length);
647 }
648
649 char* java_lang_String::as_utf8_string(oop java_string, size_t& length) {
650 typeArrayOop value = java_lang_String::value(java_string);
651 // `length` is used as the incoming number of characters to
652 // convert, and then set as the number of bytes in the UTF8 sequence.
653 length = java_lang_String::length(java_string, value);
654 bool is_latin1 = java_lang_String::is_latin1(java_string);
655 if (!is_latin1) {
656 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
657 return UNICODE::as_utf8(position, length);
658 } else {
659 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
660 return UNICODE::as_utf8(position, length);
661 }
662 }
663
664 // Uses a provided buffer if it's sufficiently large, otherwise allocates
665 // a resource array to fit
666 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& utf8_len) {
667 typeArrayOop value = java_lang_String::value(java_string);
668 int len = java_lang_String::length(java_string, value);
669 bool is_latin1 = java_lang_String::is_latin1(java_string);
670 if (!is_latin1) {
671 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
672 utf8_len = UNICODE::utf8_length(position, len);
673 if (utf8_len >= buflen) {
674 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
675 }
676 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
677 } else {
678 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
679 utf8_len = UNICODE::utf8_length(position, len);
680 if (utf8_len >= buflen) {
681 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
682 }
683 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
684 }
685 }
686
687 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen) {
688 assert(value_equals(value, java_lang_String::value(java_string)),
689 "value must be same as java_lang_String::value(java_string)");
690 int length = java_lang_String::length(java_string, value);
691 bool is_latin1 = java_lang_String::is_latin1(java_string);
692 if (!is_latin1) {
693 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
694 return UNICODE::as_utf8(position, length, buf, buflen);
695 } else {
696 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
697 return UNICODE::as_utf8(position, length, buf, buflen);
698 }
699 }
700
701 char* java_lang_String::as_utf8_string(oop java_string, char* buf, size_t buflen) {
702 typeArrayOop value = java_lang_String::value(java_string);
703 return as_utf8_string(java_string, value, buf, buflen);
704 }
705
706 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
707 // `length` is used as the incoming number of characters to
708 // convert, and then set as the number of bytes in the UTF8 sequence.
709 size_t length = static_cast<size_t>(len);
710 typeArrayOop value = java_lang_String::value(java_string);
711 bool is_latin1 = java_lang_String::is_latin1(java_string);
712 assert(start + len <= java_lang_String::length(java_string), "just checking");
713 if (!is_latin1) {
714 jchar* position = value->char_at_addr(start);
715 return UNICODE::as_utf8(position, length);
716 } else {
717 jbyte* position = value->byte_at_addr(start);
718 return UNICODE::as_utf8(position, length);
719 }
720 }
721
722 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen) {
723 assert(value_equals(value, java_lang_String::value(java_string)),
724 "value must be same as java_lang_String::value(java_string)");
725 assert(start + len <= java_lang_String::length(java_string), "just checking");
726 bool is_latin1 = java_lang_String::is_latin1(java_string);
727 if (!is_latin1) {
728 jchar* position = value->char_at_addr(start);
729 return UNICODE::as_utf8(position, len, buf, buflen);
730 } else {
731 jbyte* position = value->byte_at_addr(start);
732 return UNICODE::as_utf8(position, len, buf, buflen);
733 }
734 }
735
736 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
737 assert(java_string->klass() == vmClasses::String_klass(),
738 "must be java_string");
739 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
740 int length = java_lang_String::length(java_string, value);
741 if (length != len) {
742 return false;
743 }
744 bool is_latin1 = java_lang_String::is_latin1(java_string);
745 if (!is_latin1) {
746 for (int i = 0; i < len; i++) {
747 if (value->char_at(i) != chars[i]) {
748 return false;
749 }
750 }
751 } else {
752 for (int i = 0; i < len; i++) {
753 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
754 return false;
755 }
756 }
757 }
758 return true;
759 }
760
761 bool java_lang_String::equals(oop java_string, const char* utf8_string, size_t utf8_len) {
762 assert(java_string->klass() == vmClasses::String_klass(),
763 "must be java_string");
764 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
765 int length = java_lang_String::length(java_string, value);
766 int unicode_length = UTF8::unicode_length(utf8_string, utf8_len);
767 if (length != unicode_length) {
768 return false;
769 }
770 bool is_latin1 = java_lang_String::is_latin1(java_string);
771 jchar c;
772 if (!is_latin1) {
773 for (int i = 0; i < unicode_length; i++) {
774 utf8_string = UTF8::next(utf8_string, &c);
775 if (value->char_at(i) != c) {
776 return false;
777 }
778 }
779 } else {
780 for (int i = 0; i < unicode_length; i++) {
781 utf8_string = UTF8::next(utf8_string, &c);
782 if ((((jchar) value->byte_at(i)) & 0xff) != c) {
783 return false;
784 }
785 }
786 }
787 return true;
788 }
789
790 bool java_lang_String::equals(oop str1, oop str2) {
791 assert(str1->klass() == vmClasses::String_klass(),
792 "must be java String");
793 assert(str2->klass() == vmClasses::String_klass(),
794 "must be java String");
795 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
796 bool is_latin1 = java_lang_String::is_latin1(str1);
797 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
798 bool is_latin2 = java_lang_String::is_latin1(str2);
799
800 if (is_latin1 != is_latin2) {
801 // Strings with different coders are never equal.
802 return false;
803 }
804 return value_equals(value1, value2);
805 }
806
807 // Print the given string to the given outputStream, limiting the output to
808 // at most max_length of the string's characters. If the length exceeds the
809 // limit we print an abridged version of the string with the "middle" elided
810 // and replaced by " ... (N characters ommitted) ... ". If max_length is odd
811 // it is treated as max_length-1.
812 void java_lang_String::print(oop java_string, outputStream* st, int max_length) {
813 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
814 // We need at least two characters to print A ... B
815 assert(max_length > 1, "invalid max_length: %d", max_length);
816
817 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
818
819 if (value == nullptr) {
820 // This can happen if, e.g., printing a String
821 // object before its initializer has been called
822 st->print("nullptr");
823 return;
824 }
825
826 int length = java_lang_String::length(java_string, value);
827 bool is_latin1 = java_lang_String::is_latin1(java_string);
828
829 bool abridge = length > max_length;
830
831 st->print("\"");
832 for (int index = 0; index < length; index++) {
833 // If we need to abridge and we've printed half the allowed characters
834 // then jump to the tail of the string.
835 if (abridge && index >= max_length / 2) {
836 st->print(" ... (%d characters ommitted) ... ", length - 2 * (max_length / 2));
837 index = length - (max_length / 2);
838 abridge = false; // only do this once
839 }
840 jchar c = (!is_latin1) ? value->char_at(index) :
841 ((jchar) value->byte_at(index)) & 0xff;
842 if (c < ' ') {
843 st->print("\\x%02X", c); // print control characters e.g. \x0A
844 } else {
845 st->print("%c", c);
846 }
847 }
848 st->print("\"");
849
850 if (length > max_length) {
851 st->print(" (abridged) ");
852 }
853 }
854
855 // java_lang_Class
856
857 int java_lang_Class::_klass_offset;
858 int java_lang_Class::_array_klass_offset;
859 int java_lang_Class::_oop_size_offset;
860 int java_lang_Class::_static_oop_field_count_offset;
861 int java_lang_Class::_class_loader_offset;
862 int java_lang_Class::_module_offset;
863 int java_lang_Class::_protection_domain_offset;
864 int java_lang_Class::_component_mirror_offset;
865 int java_lang_Class::_init_lock_offset;
866 int java_lang_Class::_signers_offset;
867 int java_lang_Class::_name_offset;
868 int java_lang_Class::_source_file_offset;
869 int java_lang_Class::_classData_offset;
870 int java_lang_Class::_classRedefinedCount_offset;
871 int java_lang_Class::_reflectionData_offset;
872 int java_lang_Class::_modifiers_offset;
873 int java_lang_Class::_is_primitive_offset;
874 int java_lang_Class::_is_identity_offset;
875 int java_lang_Class::_raw_access_flags_offset;
876
877 bool java_lang_Class::_offsets_computed = false;
878 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
879 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
880
881 #ifdef ASSERT
882 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
883 assert(fd->has_initial_value(), "caller should have checked this");
884 assert(fd->field_type() == T_OBJECT, "caller should have checked this");
885 assert(fd->signature() == vmSymbols::string_signature(), "just checking");
886 }
887 #endif
888
889 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
890 DEBUG_ONLY(assert_valid_static_string_field(fd);)
891 oop string = fd->string_initial_value(CHECK);
892 mirror()->obj_field_put(fd->offset(), string);
893 }
894
895 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
896 assert(fd->has_initial_value(), "caller should have checked this");
897 BasicType t = fd->field_type();
898 switch (t) {
899 case T_BYTE:
900 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value()));
901 break;
902 case T_BOOLEAN:
903 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value()));
904 break;
905 case T_CHAR:
906 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value()));
907 break;
908 case T_SHORT:
909 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value()));
910 break;
911 case T_INT:
912 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
913 break;
914 case T_FLOAT:
915 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
916 break;
917 case T_DOUBLE:
918 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
919 break;
920 case T_LONG:
921 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
922 break;
923 default:
924 // Illegal ConstantValue attribute in class file should have been
925 // caught during classfile parsing.
926 ShouldNotReachHere();
927 }
928 }
929
930 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
931 assert(mirror.not_null() && fd->is_static(), "just checking");
932 if (fd->has_initial_value()) {
933 if (fd->field_type() != T_OBJECT) {
934 initialize_static_primitive_field(fd, mirror);
935 } else {
936 initialize_static_string_field(fd, mirror, CHECK);
937 }
938 }
939 }
940
941 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
942 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
943
944 // If the offset was read from the shared archive, it was fixed up already
945 if (!k->in_aot_cache()) {
946 if (k->is_instance_klass()) {
947 // During bootstrap, java.lang.Class wasn't loaded so static field
948 // offsets were computed without the size added it. Go back and
949 // update all the static field offsets to included the size.
950
951 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
952 // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
953 // static fields offsets are updated in this array before reencoding everything into
954 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
955
956 int java_fields;
957 int injected_fields;
958 InstanceKlass* ik = InstanceKlass::cast(k);
959 GrowableArray<FieldInfo>* fields =
960 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
961 &java_fields, &injected_fields);
962 for (int i = 0; i < fields->length(); i++) {
963 FieldInfo* fi = fields->adr_at(i);
964 if (fi->access_flags().is_static()) {
965 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
966 }
967 }
968 Array<u1>* old_stream = ik->fieldinfo_stream();
969 assert(fields->length() == (java_fields + injected_fields), "Must be");
970 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
971 ik->set_fieldinfo_stream(new_fis);
972 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
973
974 Array<u1>* old_table = ik->fieldinfo_search_table();
975 Array<u1>* search_table = FieldInfoStream::create_search_table(ik->constants(), new_fis, k->class_loader_data(), CHECK);
976 ik->set_fieldinfo_search_table(search_table);
977 MetadataFactory::free_array<u1>(k->class_loader_data(), old_table);
978
979 DEBUG_ONLY(FieldInfoStream::validate_search_table(ik->constants(), new_fis, search_table));
980 }
981 }
982
983 if (k->in_aot_cache() && k->has_archived_mirror_index()) {
984 if (ArchiveHeapLoader::is_in_use()) {
985 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
986 assert(present, "Missing archived mirror for %s", k->external_name());
987 return;
988 } else {
989 k->clear_java_mirror_handle();
990 k->clear_archived_mirror_index();
991 }
992 }
993 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
994 }
995
996 void java_lang_Class::initialize_mirror_fields(InstanceKlass* ik,
997 Handle mirror,
998 Handle protection_domain,
999 Handle classData,
1000 TRAPS) {
1001 // Allocate a simple java object for a lock.
1002 // This needs to be a java object because during class initialization
1003 // it can be held across a java call.
1004 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
1005 set_init_lock(mirror(), r);
1006
1007 // Set protection domain also
1008 set_protection_domain(mirror(), protection_domain());
1009
1010 // Initialize static fields
1011 ik->do_local_static_fields(&initialize_static_field, mirror, CHECK);
1012
1013 // Set classData
1014 set_class_data(mirror(), classData());
1015 }
1016
1017 // Set the java.lang.Module module field in the java_lang_Class mirror
1018 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
1019 if (CDSConfig::is_using_aot_linked_classes()) {
1020 oop archived_module = java_lang_Class::module(mirror());
1021 if (archived_module != nullptr) {
1022 precond(module() == nullptr || module() == archived_module);
1023 precond(AOTMetaspace::in_aot_cache_static_region((void*)k));
1024 return;
1025 }
1026 }
1027
1028 if (module.is_null()) {
1029 // During startup, the module may be null only if java.base has not been defined yet.
1030 // Put the class on the fixup_module_list to patch later when the java.lang.Module
1031 // for java.base is known. But note that since we captured the null module another
1032 // thread may have completed that initialization.
1033
1034 // With AOT-linked classes, java.base should have been defined before the
1035 // VM loads any classes.
1036 precond(!CDSConfig::is_using_aot_linked_classes());
1037
1038 bool javabase_was_defined = false;
1039 {
1040 MutexLocker m1(current, Module_lock);
1041 // Keep list of classes needing java.base module fixup
1042 if (!ModuleEntryTable::javabase_defined()) {
1043 assert(k->java_mirror() != nullptr, "Class's mirror is null");
1044 k->class_loader_data()->inc_keep_alive_ref_count();
1045 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
1046 fixup_module_field_list()->push(k);
1047 } else {
1048 javabase_was_defined = true;
1049 }
1050 }
1051
1052 // If java.base was already defined then patch this particular class with java.base.
1053 if (javabase_was_defined) {
1054 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
1055 assert(javabase_entry != nullptr && javabase_entry->module_oop() != nullptr,
1056 "Setting class module field, " JAVA_BASE_NAME " should be defined");
1057 Handle javabase_handle(current, javabase_entry->module_oop());
1058 set_module(mirror(), javabase_handle());
1059 }
1060 } else {
1061 assert(Universe::is_module_initialized() ||
1062 (ModuleEntryTable::javabase_defined() &&
1063 (module() == ModuleEntryTable::javabase_moduleEntry()->module_oop())),
1064 "Incorrect java.lang.Module specification while creating mirror");
1065 set_module(mirror(), module());
1066 }
1067 }
1068
1069 // Statically allocate fixup lists because they always get created.
1070 void java_lang_Class::allocate_fixup_lists() {
1071 if (!CDSConfig::is_using_aot_linked_classes()) {
1072 // fixup_mirror_list() is not used when we have preloaded classes. See
1073 // Universe::fixup_mirrors().
1074 GrowableArray<Klass*>* mirror_list =
1075 new (mtClass) GrowableArray<Klass*>(40, mtClass);
1076 set_fixup_mirror_list(mirror_list);
1077
1078 // With AOT-linked classes, java.base module is defined before any class
1079 // is loaded, so there's no need for fixup_module_field_list().
1080 GrowableArray<Klass*>* module_list =
1081 new (mtModule) GrowableArray<Klass*>(500, mtModule);
1082 set_fixup_module_field_list(module_list);
1083 }
1084 }
1085
1086 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
1087 Handle& mirror, Handle& comp_mirror, TRAPS) {
1088 // Allocate mirror (java.lang.Class instance)
1089 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
1090 mirror = Handle(THREAD, mirror_oop);
1091
1092 // Setup indirection from mirror->klass
1093 set_klass(mirror(), k);
1094
1095 // Set the modifiers flag.
1096 u2 computed_modifiers = k->compute_modifier_flags();
1097 set_modifiers(mirror(), computed_modifiers);
1098 // Set the raw access_flags, this is used by reflection instead of modifier flags.
1099 // The Java code for array classes gets the access flags from the element type.
1100 assert(!k->is_array_klass() || k->access_flags().as_unsigned_short() == 0, "access flags are not set for arrays");
1101 set_raw_access_flags(mirror(), k->access_flags().as_unsigned_short());
1102 set_is_identity(mirror(), k->is_array_klass() || k->is_identity_class());
1103
1104 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
1105 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
1106
1107 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
1108
1109 // It might also have a component mirror. This mirror must already exist.
1110 if (k->is_array_klass()) {
1111 if (k->is_flatArray_klass()) {
1112 Klass* element_klass = (Klass*) FlatArrayKlass::cast(k)->element_klass();
1113 assert(element_klass->is_inline_klass(), "Must be inline type component");
1114 if (is_scratch) {
1115 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1116 } else {
1117 comp_mirror = Handle(THREAD, element_klass->java_mirror());
1118 }
1119 } else if (k->is_typeArray_klass()) {
1120 BasicType type = TypeArrayKlass::cast(k)->element_type();
1121 if (is_scratch) {
1122 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
1123 } else {
1124 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
1125 }
1126 } else {
1127 assert(k->is_objArray_klass(), "Must be");
1128 assert(!k->is_refArray_klass() || !k->is_flatArray_klass(), "Must not have mirror");
1129 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1130 assert(element_klass != nullptr, "Must have an element klass");
1131 oop comp_oop = element_klass->java_mirror();
1132 if (is_scratch) {
1133 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1134 } else {
1135 comp_mirror = Handle(THREAD, comp_oop);
1136 }
1137 }
1138 assert(comp_mirror() != nullptr, "must have a mirror");
1139
1140 // Two-way link between the array klass and its component mirror:
1141 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1142 set_component_mirror(mirror(), comp_mirror());
1143 // See below for ordering dependencies between field array_klass in component mirror
1144 // and java_mirror in this klass.
1145 } else {
1146 assert(k->is_instance_klass(), "Must be");
1147 initialize_mirror_fields(InstanceKlass::cast(k), mirror, protection_domain, classData, THREAD);
1148 if (HAS_PENDING_EXCEPTION) {
1149 // If any of the fields throws an exception like OOM remove the klass field
1150 // from the mirror so GC doesn't follow it after the klass has been deallocated.
1151 // This mirror looks like a primitive type, which logically it is because it
1152 // it represents no class.
1153 set_klass(mirror(), nullptr);
1154 return;
1155 }
1156 }
1157 }
1158
1159 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1160 Handle module, Handle protection_domain,
1161 Handle classData, TRAPS) {
1162 assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1163 assert(k->java_mirror() == nullptr, "should only assign mirror once");
1164 // Class_klass has to be loaded because it is used to allocate
1165 // the mirror.
1166 if (vmClasses::Class_klass_is_loaded()) {
1167
1168 if (k->is_refined_objArray_klass()) {
1169 Klass* super_klass = k->super();
1170 assert(super_klass != nullptr, "Must be");
1171 Handle mirror(THREAD, super_klass->java_mirror());
1172 k->set_java_mirror(mirror);
1173 return;
1174 }
1175
1176 Handle mirror;
1177 Handle comp_mirror;
1178
1179 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1180
1181 // set the classLoader field in the java_lang_Class instance
1182 assert(class_loader() == k->class_loader(), "should be same");
1183 set_class_loader(mirror(), class_loader());
1184
1185 // Setup indirection from klass->mirror
1186 // after any exceptions can happen during allocations.
1187 k->set_java_mirror(mirror);
1188
1189 // Set the module field in the java_lang_Class instance. This must be done
1190 // after the mirror is set.
1191 set_mirror_module_field(THREAD, k, mirror, module);
1192
1193 if (comp_mirror() != nullptr) {
1194 // Set after k->java_mirror() is published, because compiled code running
1195 // concurrently doesn't expect a k to have a null java_mirror.
1196 release_set_array_klass(comp_mirror(), k);
1197 }
1198
1199 if (CDSConfig::is_dumping_heap()) {
1200 create_scratch_mirror(k, CHECK);
1201 }
1202 } else {
1203 assert(!CDSConfig::is_using_aot_linked_classes(), "should not come here");
1204 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1205 fixup_mirror_list()->push(k);
1206 }
1207 }
1208
1209 #if INCLUDE_CDS_JAVA_HEAP
1210 // The "scratch mirror" stores the states of the mirror object that can be
1211 // decided at dump time (such as the initial values of the static fields, the
1212 // component mirror, etc). At runtime, more information is added to it by
1213 // java_lang_Class::restore_archived_mirror().
1214 //
1215 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1216 // produces the same result as /*runtime*/create_mirror().
1217 //
1218 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1219 // latter may contain dumptime-specific information that cannot be archived
1220 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1221 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1222 if ((k->class_loader() != nullptr &&
1223 k->class_loader() != SystemDictionary::java_platform_loader() &&
1224 k->class_loader() != SystemDictionary::java_system_loader())) {
1225 // We only archive the mirrors of classes loaded by the built-in loaders
1226 return;
1227 }
1228
1229 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1230 Handle mirror;
1231 Handle comp_mirror;
1232 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1233
1234 if (comp_mirror() != nullptr) {
1235 release_set_array_klass(comp_mirror(), k);
1236 }
1237
1238 HeapShared::set_scratch_java_mirror(k, mirror());
1239 }
1240
1241 // Returns true if the mirror is updated, false if no archived mirror
1242 // data is present. After the archived mirror object is restored, the
1243 // shared klass' _has_raw_archived_mirror flag is cleared.
1244 bool java_lang_Class::restore_archived_mirror(Klass *k,
1245 Handle class_loader, Handle module,
1246 Handle protection_domain, TRAPS) {
1247 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1248 // see more details in vmClasses::resolve_all().
1249 if (!vmClasses::Class_klass_is_loaded() && !CDSConfig::is_using_aot_linked_classes()) {
1250 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1251 fixup_mirror_list()->push(k);
1252 return true;
1253 }
1254
1255 oop m = k->archived_java_mirror();
1256 assert(m != nullptr, "must have stored non-null archived mirror");
1257
1258 // Sanity: clear it now to prevent re-initialization if any of the following fails
1259 k->clear_archived_mirror_index();
1260
1261 // mirror is archived, restore
1262 log_debug(aot, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1263 Handle mirror(THREAD, m);
1264
1265 if (!k->is_array_klass()) {
1266 assert(as_Klass(m) == k, "must be");
1267 // - local static final fields with initial values were initialized at dump time
1268
1269 // create the init_lock
1270 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1271 set_init_lock(mirror(), r);
1272
1273 if (protection_domain.not_null()) {
1274 set_protection_domain(mirror(), protection_domain());
1275 }
1276 } else {
1277 ObjArrayKlass* objarray_k = (ObjArrayKlass*)as_Klass(m);
1278 // Mirror should be restored for an ObjArrayKlass or one of its refined array klasses
1279 assert(objarray_k == k || objarray_k->next_refined_array_klass() == k, "must be");
1280 }
1281
1282 assert(class_loader() == k->class_loader(), "should be same");
1283 if (class_loader.not_null()) {
1284 set_class_loader(mirror(), class_loader());
1285 }
1286
1287 k->set_java_mirror(mirror);
1288
1289 set_mirror_module_field(THREAD, k, mirror, module);
1290
1291 if (log_is_enabled(Trace, aot, heap, mirror)) {
1292 ResourceMark rm(THREAD);
1293 log_trace(aot, heap, mirror)(
1294 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1295 }
1296
1297 return true;
1298 }
1299 #endif // INCLUDE_CDS_JAVA_HEAP
1300
1301 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1302 assert(_module_offset != 0, "must have been computed already");
1303 set_module(k->java_mirror(), module());
1304 }
1305
1306 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1307 assert(_oop_size_offset != 0, "must be set");
1308 assert(size > 0, "Oop size must be greater than zero, not %zu", size);
1309 assert(size <= INT_MAX, "Lossy conversion: %zu", size);
1310 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1311 }
1312
1313 int java_lang_Class::static_oop_field_count(oop java_class) {
1314 assert(_static_oop_field_count_offset != 0, "must be set");
1315 return java_class->int_field(_static_oop_field_count_offset);
1316 }
1317
1318 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1319 assert(_static_oop_field_count_offset != 0, "must be set");
1320 java_class->int_field_put(_static_oop_field_count_offset, size);
1321 }
1322
1323 oop java_lang_Class::protection_domain(oop java_class) {
1324 assert(_protection_domain_offset != 0, "must be set");
1325 return java_class->obj_field(_protection_domain_offset);
1326 }
1327 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1328 assert(_protection_domain_offset != 0, "must be set");
1329 java_class->obj_field_put(_protection_domain_offset, pd);
1330 }
1331
1332 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1333 assert(_component_mirror_offset != 0, "must be set");
1334 assert(java_lang_Class::as_Klass(java_class) != nullptr &&
1335 java_lang_Class::as_Klass(java_class)->is_array_klass(), "must be");
1336 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1337 }
1338
1339 oop java_lang_Class::component_mirror(oop java_class) {
1340 assert(_component_mirror_offset != 0, "must be set");
1341 return java_class->obj_field(_component_mirror_offset);
1342 }
1343
1344 oop java_lang_Class::init_lock(oop java_class) {
1345 assert(_init_lock_offset != 0, "must be set");
1346 return java_class->obj_field(_init_lock_offset);
1347 }
1348 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1349 assert(_init_lock_offset != 0, "must be set");
1350 java_class->obj_field_put(_init_lock_offset, init_lock);
1351 }
1352
1353 objArrayOop java_lang_Class::signers(oop java_class) {
1354 assert(_signers_offset != 0, "must be set");
1355 return (objArrayOop)java_class->obj_field(_signers_offset);
1356 }
1357
1358 oop java_lang_Class::class_data(oop java_class) {
1359 assert(_classData_offset != 0, "must be set");
1360 return java_class->obj_field(_classData_offset);
1361 }
1362 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1363 assert(_classData_offset != 0, "must be set");
1364 java_class->obj_field_put(_classData_offset, class_data);
1365 }
1366
1367 void java_lang_Class::set_reflection_data(oop java_class, oop reflection_data) {
1368 assert(_reflectionData_offset != 0, "must be set");
1369 java_class->obj_field_put(_reflectionData_offset, reflection_data);
1370 }
1371
1372 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1373 assert(_class_loader_offset != 0, "offsets should have been initialized");
1374 java_class->obj_field_put(_class_loader_offset, loader);
1375 }
1376
1377 oop java_lang_Class::class_loader(oop java_class) {
1378 assert(_class_loader_offset != 0, "must be set");
1379 return java_class->obj_field(_class_loader_offset);
1380 }
1381
1382 oop java_lang_Class::module(oop java_class) {
1383 assert(_module_offset != 0, "must be set");
1384 return java_class->obj_field(_module_offset);
1385 }
1386
1387 void java_lang_Class::set_module(oop java_class, oop module) {
1388 assert(_module_offset != 0, "must be set");
1389 java_class->obj_field_put(_module_offset, module);
1390 }
1391
1392 oop java_lang_Class::name(Handle java_class, TRAPS) {
1393 assert(_name_offset != 0, "must be set");
1394 oop o = java_class->obj_field(_name_offset);
1395 if (o == nullptr) {
1396 o = StringTable::intern(as_external_name(java_class()), THREAD);
1397 java_class->obj_field_put(_name_offset, o);
1398 }
1399 return o;
1400 }
1401
1402 oop java_lang_Class::source_file(oop java_class) {
1403 assert(_source_file_offset != 0, "must be set");
1404 return java_class->obj_field(_source_file_offset);
1405 }
1406
1407 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1408 assert(_source_file_offset != 0, "must be set");
1409 java_class->obj_field_put(_source_file_offset, source_file);
1410 }
1411
1412 void java_lang_Class::set_is_primitive(oop java_class) {
1413 assert(_is_primitive_offset != 0, "must be set");
1414 java_class->bool_field_put(_is_primitive_offset, true);
1415 }
1416
1417 void java_lang_Class::set_is_identity(oop java_class, bool value) {
1418 assert(_is_identity_offset != 0, "must be set");
1419 java_class->bool_field_put(_is_identity_offset, value);
1420 }
1421
1422 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1423 // Mirrors for basic types have a null klass field, which makes them special.
1424 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1425 if (type != T_VOID) {
1426 Klass* aklass = Universe::typeArrayKlass(type);
1427 assert(aklass != nullptr, "correct bootstrap");
1428 release_set_array_klass(java_class, aklass);
1429 }
1430 #ifdef ASSERT
1431 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1432 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1433 #endif
1434 set_modifiers(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
1435 set_raw_access_flags(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
1436
1437 set_is_primitive(java_class);
1438 return java_class;
1439 }
1440
1441 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1442 assert(is_instance(java_class), "must be a Class object");
1443 java_class->metadata_field_put(_klass_offset, klass);
1444 }
1445
1446
1447 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1448 assert(is_instance(java_class), "must be a Class object");
1449 Symbol* name = nullptr;
1450 bool is_instance = false;
1451 if (is_primitive(java_class)) {
1452 name = vmSymbols::type_signature(primitive_type(java_class));
1453 } else {
1454 Klass* k = as_Klass(java_class);
1455 is_instance = k->is_instance_klass();
1456 name = k->name();
1457 }
1458 if (name == nullptr) {
1459 st->print("<null>");
1460 return;
1461 }
1462 if (is_instance) {
1463 st->print("L");
1464 }
1465 st->write((char*) name->base(), (int) name->utf8_length());
1466 if (is_instance) st->print(";");
1467 }
1468
1469 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1470 assert(is_instance(java_class), "must be a Class object");
1471 Symbol* name;
1472 if (is_primitive(java_class)) {
1473 name = vmSymbols::type_signature(primitive_type(java_class));
1474 // Because this can create a new symbol, the caller has to decrement
1475 // the refcount, so make adjustment here and below for symbols returned
1476 // that are not created or incremented due to a successful lookup.
1477 name->increment_refcount();
1478 } else {
1479 Klass* k = as_Klass(java_class);
1480 if (!k->is_instance_klass()) {
1481 name = k->name();
1482 name->increment_refcount();
1483 } else {
1484 ResourceMark rm;
1485 const char* sigstr = k->signature_name();
1486 int siglen = (int) strlen(sigstr);
1487 if (!intern_if_not_found) {
1488 name = SymbolTable::probe(sigstr, siglen);
1489 } else {
1490 name = SymbolTable::new_symbol(sigstr, siglen);
1491 }
1492 }
1493 }
1494 return name;
1495 }
1496
1497 // Returns the Java name for this Java mirror (Resource allocated)
1498 // See Klass::external_name().
1499 // For primitive type Java mirrors, its type name is returned.
1500 const char* java_lang_Class::as_external_name(oop java_class) {
1501 assert(is_instance(java_class), "must be a Class object");
1502 const char* name = nullptr;
1503 if (is_primitive(java_class)) {
1504 name = type2name(primitive_type(java_class));
1505 } else {
1506 name = as_Klass(java_class)->external_name();
1507 }
1508 if (name == nullptr) {
1509 name = "<null>";
1510 }
1511 return name;
1512 }
1513
1514 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1515 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1516 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass");
1517 return k;
1518 }
1519
1520
1521 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1522 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1523 assert(!klass->is_refined_objArray_klass(), "should not be ref or flat array klass");
1524 java_class->release_metadata_field_put(_array_klass_offset, klass);
1525 }
1526
1527
1528 BasicType java_lang_Class::primitive_type(oop java_class) {
1529 assert(is_primitive(java_class), "just checking");
1530 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1531 BasicType type = T_VOID;
1532 if (ak != nullptr) {
1533 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1534 type = ArrayKlass::cast(ak)->element_type();
1535 } else {
1536 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1537 }
1538 #ifdef ASSERT
1539 if (CDSConfig::is_dumping_heap()) {
1540 oop mirror = Universe::java_mirror(type);
1541 oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1542 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1543 } else {
1544 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1545 }
1546 #endif
1547 return type;
1548 }
1549
1550 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1551 assert(is_instance(java_class), "must be a Class object");
1552 if (is_primitive(java_class)) {
1553 if (reference_klass != nullptr)
1554 (*reference_klass) = nullptr;
1555 return primitive_type(java_class);
1556 } else {
1557 if (reference_klass != nullptr)
1558 (*reference_klass) = as_Klass(java_class);
1559 return T_OBJECT;
1560 }
1561 }
1562
1563
1564 oop java_lang_Class::primitive_mirror(BasicType t) {
1565 oop mirror = Universe::java_mirror(t);
1566 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1567 assert(is_primitive(mirror), "must be primitive");
1568 return mirror;
1569 }
1570
1571 #define CLASS_FIELDS_DO(macro) \
1572 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1573 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1574 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1575 macro(_module_offset, k, "module", module_signature, false); \
1576 macro(_name_offset, k, "name", string_signature, false); \
1577 macro(_classData_offset, k, "classData", object_signature, false); \
1578 macro(_reflectionData_offset, k, "reflectionData", java_lang_ref_SoftReference_signature, false); \
1579 macro(_signers_offset, k, "signers", object_array_signature, false); \
1580 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), char_signature, false); \
1581 macro(_raw_access_flags_offset, k, "classFileAccessFlags", char_signature, false); \
1582 macro(_protection_domain_offset, k, "protectionDomain", java_security_ProtectionDomain_signature, false); \
1583 macro(_is_primitive_offset, k, "primitive", bool_signature, false); \
1584 macro(_is_identity_offset, k, "identity", bool_signature, false);
1585
1586 void java_lang_Class::compute_offsets() {
1587 if (_offsets_computed) {
1588 return;
1589 }
1590
1591 _offsets_computed = true;
1592
1593 InstanceKlass* k = vmClasses::Class_klass();
1594 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1595 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1596 }
1597
1598 #if INCLUDE_CDS
1599 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1600 f->do_bool(&_offsets_computed);
1601
1602 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1603
1604 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1605 }
1606 #endif
1607
1608 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1609 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1610 return the_class_mirror->int_field(_classRedefinedCount_offset);
1611 }
1612
1613 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1614 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1615 the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1616 }
1617
1618 int java_lang_Class::modifiers(oop the_class_mirror) {
1619 assert(_modifiers_offset != 0, "offsets should have been initialized");
1620 return the_class_mirror->char_field(_modifiers_offset);
1621 }
1622
1623 void java_lang_Class::set_modifiers(oop the_class_mirror, u2 value) {
1624 assert(_modifiers_offset != 0, "offsets should have been initialized");
1625 the_class_mirror->char_field_put(_modifiers_offset, value);
1626 }
1627
1628 int java_lang_Class::raw_access_flags(oop the_class_mirror) {
1629 assert(_raw_access_flags_offset != 0, "offsets should have been initialized");
1630 return the_class_mirror->char_field(_raw_access_flags_offset);
1631 }
1632
1633 void java_lang_Class::set_raw_access_flags(oop the_class_mirror, u2 value) {
1634 assert(_raw_access_flags_offset != 0, "offsets should have been initialized");
1635 the_class_mirror->char_field_put(_raw_access_flags_offset, value);
1636 }
1637
1638
1639 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1640 // platform thread structure, and a eetop offset which was used for thread
1641 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1642 // merged, so in the HotSpot VM we just use the eetop field for the thread
1643 // instead of the privateInfo_offset.
1644 //
1645 // Note: The stackSize field is only present starting in 1.4.
1646
1647 int java_lang_Thread_FieldHolder::_group_offset;
1648 int java_lang_Thread_FieldHolder::_priority_offset;
1649 int java_lang_Thread_FieldHolder::_stackSize_offset;
1650 int java_lang_Thread_FieldHolder::_daemon_offset;
1651 int java_lang_Thread_FieldHolder::_thread_status_offset;
1652
1653 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1654 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1655 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1656 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1657 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1658 macro(_thread_status_offset, k, "threadStatus", int_signature, false)
1659
1660 void java_lang_Thread_FieldHolder::compute_offsets() {
1661 assert(_group_offset == 0, "offsets should be initialized only once");
1662
1663 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1664 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1665 }
1666
1667 #if INCLUDE_CDS
1668 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1669 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1670 }
1671 #endif
1672
1673 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1674 return holder->obj_field(_group_offset);
1675 }
1676
1677 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1678 return (ThreadPriority)holder->int_field(_priority_offset);
1679 }
1680
1681 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1682 holder->int_field_put(_priority_offset, priority);
1683 }
1684
1685 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1686 return holder->long_field(_stackSize_offset);
1687 }
1688
1689 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1690 return holder->bool_field(_daemon_offset) != 0;
1691 }
1692
1693 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1694 assert(val, "daemon status is never turned off");
1695 holder->bool_field_put(_daemon_offset, val);
1696 }
1697
1698 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1699 holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1700 }
1701
1702 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1703 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1704 }
1705
1706
1707 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1708
1709 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1710 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true);
1711
1712 void java_lang_Thread_Constants::compute_offsets() {
1713 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1714
1715 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1716 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1717 }
1718
1719 #if INCLUDE_CDS
1720 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1721 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1722 }
1723 #endif
1724
1725 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1726 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1727 oop base = k->static_field_base_raw();
1728 return base->obj_field(_static_VTHREAD_GROUP_offset);
1729 }
1730
1731
1732 int java_lang_Thread::_holder_offset;
1733 int java_lang_Thread::_name_offset;
1734 int java_lang_Thread::_contextClassLoader_offset;
1735 int java_lang_Thread::_eetop_offset;
1736 int java_lang_Thread::_jvmti_thread_state_offset;
1737 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1738 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1739 int java_lang_Thread::_interrupted_offset;
1740 int java_lang_Thread::_interruptLock_offset;
1741 int java_lang_Thread::_tid_offset;
1742 int java_lang_Thread::_continuation_offset;
1743 int java_lang_Thread::_park_blocker_offset;
1744 int java_lang_Thread::_scopedValueBindings_offset;
1745 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1746
1747 #define THREAD_FIELDS_DO(macro) \
1748 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \
1749 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1750 macro(_contextClassLoader_offset, k, "contextClassLoader", classloader_signature, false); \
1751 macro(_eetop_offset, k, "eetop", long_signature, false); \
1752 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1753 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \
1754 macro(_tid_offset, k, "tid", long_signature, false); \
1755 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1756 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1757 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1758
1759 void java_lang_Thread::compute_offsets() {
1760 assert(_holder_offset == 0, "offsets should be initialized only once");
1761
1762 InstanceKlass* k = vmClasses::Thread_klass();
1763 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1764 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1765 }
1766
1767 #if INCLUDE_CDS
1768 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1769 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1770 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1771 }
1772 #endif
1773
1774 JavaThread* java_lang_Thread::thread(oop java_thread) {
1775 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1776 }
1777
1778 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1779 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1780 }
1781
1782 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1783 java_thread->address_field_put(_eetop_offset, (address)thread);
1784 }
1785
1786 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1787 java_thread->release_address_field_put(_eetop_offset, (address)thread);
1788 }
1789
1790 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1791 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1792 }
1793
1794 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1795 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1796 }
1797
1798 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1799 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1800 }
1801
1802 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1803 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1804 int val = VTMS_transition_disable_count(java_thread);
1805 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1806 }
1807
1808 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1809 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1810 int val = VTMS_transition_disable_count(java_thread);
1811 assert(val > 0, "VTMS_transition_disable_count should never be negative");
1812 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1813 }
1814
1815 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1816 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1817 }
1818
1819 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1820 assert(is_in_VTMS_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside");
1821 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1822 }
1823
1824 int java_lang_Thread::is_in_VTMS_transition_offset() {
1825 return _jvmti_is_in_VTMS_transition_offset;
1826 }
1827
1828 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1829 assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1830 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1831 }
1832
1833 oop java_lang_Thread::holder(oop java_thread) {
1834 // Note: may return null if the thread is still attaching
1835 return java_thread->obj_field(_holder_offset);
1836 }
1837 oop java_lang_Thread::interrupt_lock(oop java_thread) {
1838 return java_thread->obj_field(_interruptLock_offset);
1839 }
1840
1841 bool java_lang_Thread::interrupted(oop java_thread) {
1842 // Make sure the caller can safely access oops.
1843 assert(Thread::current()->is_VM_thread() ||
1844 (JavaThread::current()->thread_state() != _thread_blocked &&
1845 JavaThread::current()->thread_state() != _thread_in_native),
1846 "Unsafe access to oop");
1847 return java_thread->bool_field_volatile(_interrupted_offset);
1848 }
1849
1850 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1851 // Make sure the caller can safely access oops.
1852 assert(Thread::current()->is_VM_thread() ||
1853 (JavaThread::current()->thread_state() != _thread_blocked &&
1854 JavaThread::current()->thread_state() != _thread_in_native),
1855 "Unsafe access to oop");
1856 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1857 }
1858
1859
1860 oop java_lang_Thread::name(oop java_thread) {
1861 return java_thread->obj_field(_name_offset);
1862 }
1863
1864
1865 void java_lang_Thread::set_name(oop java_thread, oop name) {
1866 java_thread->obj_field_put(_name_offset, name);
1867 }
1868
1869 // Convenience macros for setting and getting Thread fields that
1870 // are actually stored in the FieldHolder object of the thread.
1871 // The FieldHolder can be null whilst a thread is attaching via
1872 // JNI, and when the main thread is attaching.
1873
1874 // The default value should be the default/zero initialized value
1875 // of the field as it would be in java.lang.Thread.FieldHolder.
1876 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \
1877 { \
1878 oop holder = java_lang_Thread::holder(java_thread); \
1879 if (holder != nullptr) \
1880 return java_lang_Thread_FieldHolder::field(holder); \
1881 else \
1882 return default_val; \
1883 }
1884
1885 // We should never be trying to set a field of an attaching thread.
1886 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \
1887 { \
1888 oop holder = java_lang_Thread::holder(java_thread); \
1889 assert(holder != nullptr, "Thread not fully initialized"); \
1890 java_lang_Thread_FieldHolder::set_##field(holder, value); \
1891 }
1892
1893
1894 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1895 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1896 }
1897
1898
1899 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1900 SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1901 }
1902
1903
1904 oop java_lang_Thread::threadGroup(oop java_thread) {
1905 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1906 }
1907
1908
1909 bool java_lang_Thread::is_alive(oop java_thread) {
1910 JavaThread* thr = java_lang_Thread::thread(java_thread);
1911 return (thr != nullptr);
1912 }
1913
1914
1915 bool java_lang_Thread::is_daemon(oop java_thread) {
1916 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1917 }
1918
1919
1920 void java_lang_Thread::set_daemon(oop java_thread) {
1921 SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1922 }
1923
1924 oop java_lang_Thread::context_class_loader(oop java_thread) {
1925 return java_thread->obj_field(_contextClassLoader_offset);
1926 }
1927
1928
1929 jlong java_lang_Thread::stackSize(oop java_thread) {
1930 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1931 }
1932
1933 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1934 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1935 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1936 }
1937
1938 // Read thread status value from threadStatus field in java.lang.Thread java class.
1939 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1940 // Make sure the caller is operating on behalf of the VM or is
1941 // running VM code (state == _thread_in_vm).
1942 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1943 JavaThread::current()->thread_state() == _thread_in_vm ||
1944 JavaThread::current() == java_lang_Thread::thread(java_thread),
1945 "unsafe call to java_lang_Thread::get_thread_status()?");
1946 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1947 }
1948
1949 ByteSize java_lang_Thread::thread_id_offset() {
1950 return in_ByteSize(_tid_offset);
1951 }
1952
1953 oop java_lang_Thread::park_blocker(oop java_thread) {
1954 return java_thread->obj_field_access<MO_RELAXED>(_park_blocker_offset);
1955 }
1956
1957 // Obtain stack trace for platform or mounted virtual thread.
1958 // If jthread is a virtual thread and it has been unmounted (or remounted to different carrier) the method returns null.
1959 // The caller (java.lang.VirtualThread) handles returned nulls via retry.
1960 oop java_lang_Thread::async_get_stack_trace(jobject jthread, TRAPS) {
1961 ThreadsListHandle tlh(THREAD);
1962 JavaThread* java_thread = nullptr;
1963 oop thread_oop;
1964
1965 bool has_java_thread = tlh.cv_internal_thread_to_JavaThread(jthread, &java_thread, &thread_oop);
1966 if (!has_java_thread) {
1967 return nullptr;
1968 }
1969
1970 class GetStackTraceHandshakeClosure : public HandshakeClosure {
1971 public:
1972 const Handle _thread_h;
1973 int _depth;
1974 bool _retry_handshake;
1975 GrowableArray<Method*>* _methods;
1976 GrowableArray<int>* _bcis;
1977
1978 GetStackTraceHandshakeClosure(Handle thread_h) :
1979 HandshakeClosure("GetStackTraceHandshakeClosure"), _thread_h(thread_h), _depth(0), _retry_handshake(false),
1980 _methods(nullptr), _bcis(nullptr) {
1981 }
1982 ~GetStackTraceHandshakeClosure() {
1983 delete _methods;
1984 delete _bcis;
1985 }
1986
1987 bool read_reset_retry() {
1988 bool ret = _retry_handshake;
1989 // If we re-execute the handshake this method need to return false
1990 // when the handshake cannot be performed. (E.g. thread terminating)
1991 _retry_handshake = false;
1992 return ret;
1993 }
1994
1995 void do_thread(Thread* th) {
1996 if (!Thread::current()->is_Java_thread()) {
1997 _retry_handshake = true;
1998 return;
1999 }
2000
2001 JavaThread* java_thread = JavaThread::cast(th);
2002
2003 if (!java_thread->has_last_Java_frame()) {
2004 return;
2005 }
2006
2007 bool carrier = false;
2008 if (java_lang_VirtualThread::is_instance(_thread_h())) {
2009 // Ensure _thread_h is still mounted to java_thread.
2010 const ContinuationEntry* ce = java_thread->vthread_continuation();
2011 if (ce == nullptr || ce->cont_oop(java_thread) != java_lang_VirtualThread::continuation(_thread_h())) {
2012 // Target thread has been unmounted.
2013 return;
2014 }
2015 } else {
2016 carrier = (java_thread->vthread_continuation() != nullptr);
2017 }
2018
2019 const int max_depth = MaxJavaStackTraceDepth;
2020 const bool skip_hidden = !ShowHiddenFrames;
2021
2022 // Pick minimum length that will cover most cases
2023 int init_length = 64;
2024 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
2025 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
2026
2027 int total_count = 0;
2028 for (vframeStream vfst(java_thread, false, false, carrier); // we don't process frames as we don't care about oops
2029 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
2030 vfst.next()) {
2031
2032 if (skip_hidden && (vfst.method()->is_hidden() ||
2033 vfst.method()->is_continuation_enter_intrinsic())) {
2034 continue;
2035 }
2036
2037 _methods->push(vfst.method());
2038 _bcis->push(vfst.bci());
2039 total_count++;
2040 }
2041
2042 _depth = total_count;
2043 }
2044 };
2045
2046 // Handshake with target
2047 ResourceMark rm(THREAD);
2048 HandleMark hm(THREAD);
2049 GetStackTraceHandshakeClosure gsthc(Handle(THREAD, thread_oop));
2050 do {
2051 Handshake::execute(&gsthc, &tlh, java_thread);
2052 } while (gsthc.read_reset_retry());
2053
2054 // Stop if no stack trace is found.
2055 if (gsthc._depth == 0) {
2056 return nullptr;
2057 }
2058
2059 // Convert to StackTraceElement array
2060 InstanceKlass* k = vmClasses::StackTraceElement_klass();
2061 assert(k != nullptr, "must be loaded in 1.4+");
2062 if (k->should_be_initialized()) {
2063 k->initialize(CHECK_NULL);
2064 }
2065 objArrayHandle trace = oopFactory::new_objArray_handle(k, gsthc._depth, CHECK_NULL);
2066
2067 for (int i = 0; i < gsthc._depth; i++) {
2068 methodHandle method(THREAD, gsthc._methods->at(i));
2069 oop element = java_lang_StackTraceElement::create(method,
2070 gsthc._bcis->at(i),
2071 CHECK_NULL);
2072 trace->obj_at_put(i, element);
2073 }
2074
2075 return trace();
2076 }
2077
2078 const char* java_lang_Thread::thread_status_name(oop java_thread) {
2079 JavaThreadStatus status = get_thread_status(java_thread);
2080 switch (status) {
2081 case JavaThreadStatus::NEW : return "NEW";
2082 case JavaThreadStatus::RUNNABLE : return "RUNNABLE";
2083 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)";
2084 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)";
2085 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
2086 case JavaThreadStatus::PARKED : return "WAITING (parking)";
2087 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)";
2088 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
2089 case JavaThreadStatus::TERMINATED : return "TERMINATED";
2090 default : return "UNKNOWN";
2091 };
2092 }
2093 int java_lang_ThreadGroup::_parent_offset;
2094 int java_lang_ThreadGroup::_name_offset;
2095 int java_lang_ThreadGroup::_maxPriority_offset;
2096 int java_lang_ThreadGroup::_daemon_offset;
2097
2098 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
2099 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2100 return java_thread_group->obj_field(_parent_offset);
2101 }
2102
2103 // ("name as oop" accessor is not necessary)
2104
2105 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
2106 oop name = java_thread_group->obj_field(_name_offset);
2107 // ThreadGroup.name can be null
2108 if (name != nullptr) {
2109 return java_lang_String::as_utf8_string(name);
2110 }
2111 return nullptr;
2112 }
2113
2114 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
2115 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2116 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
2117 }
2118
2119 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
2120 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2121 return java_thread_group->bool_field(_daemon_offset) != 0;
2122 }
2123
2124 #define THREADGROUP_FIELDS_DO(macro) \
2125 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
2126 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
2127 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
2128 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false);
2129
2130 void java_lang_ThreadGroup::compute_offsets() {
2131 assert(_parent_offset == 0, "offsets should be initialized only once");
2132
2133 InstanceKlass* k = vmClasses::ThreadGroup_klass();
2134 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2135 }
2136
2137 #if INCLUDE_CDS
2138 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
2139 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2140 }
2141 #endif
2142
2143
2144 // java_lang_VirtualThread
2145
2146 int java_lang_VirtualThread::static_vthread_scope_offset;
2147 int java_lang_VirtualThread::_carrierThread_offset;
2148 int java_lang_VirtualThread::_continuation_offset;
2149 int java_lang_VirtualThread::_state_offset;
2150 int java_lang_VirtualThread::_next_offset;
2151 int java_lang_VirtualThread::_onWaitingList_offset;
2152 int java_lang_VirtualThread::_notified_offset;
2153 int java_lang_VirtualThread::_interruptible_wait_offset;
2154 int java_lang_VirtualThread::_timeout_offset;
2155 int java_lang_VirtualThread::_objectWaiter_offset;
2156
2157 #define VTHREAD_FIELDS_DO(macro) \
2158 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \
2159 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \
2160 macro(_continuation_offset, k, "cont", continuation_signature, false); \
2161 macro(_state_offset, k, "state", int_signature, false); \
2162 macro(_next_offset, k, "next", vthread_signature, false); \
2163 macro(_onWaitingList_offset, k, "onWaitingList", bool_signature, false); \
2164 macro(_notified_offset, k, "notified", bool_signature, false); \
2165 macro(_interruptible_wait_offset, k, "interruptibleWait", bool_signature, false); \
2166 macro(_timeout_offset, k, "timeout", long_signature, false);
2167
2168
2169 void java_lang_VirtualThread::compute_offsets() {
2170 InstanceKlass* k = vmClasses::VirtualThread_klass();
2171 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2172 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2173 }
2174
2175 bool java_lang_VirtualThread::is_instance(oop obj) {
2176 return obj != nullptr && is_subclass(obj->klass());
2177 }
2178
2179 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
2180 oop thread = vthread->obj_field(_carrierThread_offset);
2181 return thread;
2182 }
2183
2184 oop java_lang_VirtualThread::continuation(oop vthread) {
2185 oop cont = vthread->obj_field(_continuation_offset);
2186 return cont;
2187 }
2188
2189 int java_lang_VirtualThread::state(oop vthread) {
2190 return vthread->int_field_acquire(_state_offset);
2191 }
2192
2193 void java_lang_VirtualThread::set_state(oop vthread, int state) {
2194 vthread->release_int_field_put(_state_offset, state);
2195 }
2196
2197 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) {
2198 jint* addr = vthread->field_addr<jint>(_state_offset);
2199 int res = AtomicAccess::cmpxchg(addr, old_state, new_state);
2200 return res;
2201 }
2202
2203 oop java_lang_VirtualThread::next(oop vthread) {
2204 return vthread->obj_field(_next_offset);
2205 }
2206
2207 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) {
2208 vthread->obj_field_put(_next_offset, next_vthread);
2209 }
2210
2211 // Add vthread to the waiting list if it's not already in it. Multiple threads
2212 // could be trying to add vthread to the list at the same time, so we control
2213 // access with a cmpxchg on onWaitingList. The winner adds vthread to the list.
2214 // Method returns true if we added vthread to the list, false otherwise.
2215 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) {
2216 jboolean* addr = vthread->field_addr<jboolean>(_onWaitingList_offset);
2217 jboolean vthread_on_list = AtomicAccess::load(addr);
2218 if (!vthread_on_list) {
2219 vthread_on_list = AtomicAccess::cmpxchg(addr, (jboolean)JNI_FALSE, (jboolean)JNI_TRUE);
2220 if (!vthread_on_list) {
2221 for (;;) {
2222 oop head = list_head.resolve();
2223 java_lang_VirtualThread::set_next(vthread, head);
2224 if (list_head.cmpxchg(head, vthread) == head) return true;
2225 }
2226 }
2227 }
2228 return false; // already on waiting list
2229 }
2230
2231 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) {
2232 vthread->bool_field_put_volatile(_notified_offset, value);
2233 }
2234
2235 void java_lang_VirtualThread::set_interruptible_wait(oop vthread, jboolean value) {
2236 vthread->bool_field_put_volatile(_interruptible_wait_offset, value);
2237 }
2238
2239 jlong java_lang_VirtualThread::timeout(oop vthread) {
2240 return vthread->long_field(_timeout_offset);
2241 }
2242
2243 void java_lang_VirtualThread::set_timeout(oop vthread, jlong value) {
2244 vthread->long_field_put(_timeout_offset, value);
2245 }
2246
2247 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2248 JavaThreadStatus status = JavaThreadStatus::NEW;
2249 switch (state & ~SUSPENDED) {
2250 case NEW:
2251 status = JavaThreadStatus::NEW;
2252 break;
2253 case STARTED:
2254 case RUNNING:
2255 case PARKING:
2256 case TIMED_PARKING:
2257 case UNPARKED:
2258 case YIELDING:
2259 case YIELDED:
2260 case UNBLOCKED:
2261 case WAITING:
2262 case TIMED_WAITING:
2263 status = JavaThreadStatus::RUNNABLE;
2264 break;
2265 case PARKED:
2266 case PINNED:
2267 status = JavaThreadStatus::PARKED;
2268 break;
2269 case TIMED_PARKED:
2270 case TIMED_PINNED:
2271 status = JavaThreadStatus::PARKED_TIMED;
2272 break;
2273 case BLOCKING:
2274 case BLOCKED:
2275 status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER;
2276 break;
2277 case WAIT:
2278 status = JavaThreadStatus::IN_OBJECT_WAIT;
2279 break;
2280 case TIMED_WAIT:
2281 status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED;
2282 break;
2283 case TERMINATED:
2284 status = JavaThreadStatus::TERMINATED;
2285 break;
2286 default:
2287 ShouldNotReachHere();
2288 }
2289 return status;
2290 }
2291
2292 ObjectMonitor* java_lang_VirtualThread::current_pending_monitor(oop vthread) {
2293 ObjectWaiter* waiter = objectWaiter(vthread);
2294 if (waiter != nullptr && waiter->at_monitorenter()) {
2295 return waiter->monitor();
2296 }
2297 return nullptr;
2298 }
2299
2300 ObjectMonitor* java_lang_VirtualThread::current_waiting_monitor(oop vthread) {
2301 ObjectWaiter* waiter = objectWaiter(vthread);
2302 if (waiter != nullptr && waiter->is_wait()) {
2303 return waiter->monitor();
2304 }
2305 return nullptr;
2306 }
2307
2308 bool java_lang_VirtualThread::is_preempted(oop vthread) {
2309 oop continuation = java_lang_VirtualThread::continuation(vthread);
2310 assert(continuation != nullptr, "vthread with no continuation");
2311 stackChunkOop chunk = jdk_internal_vm_Continuation::tail(continuation);
2312 return chunk != nullptr && chunk->preempted();
2313 }
2314
2315 #if INCLUDE_CDS
2316 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2317 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2318 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2319 }
2320 #endif
2321
2322 // java_lang_Throwable
2323
2324 int java_lang_Throwable::_backtrace_offset;
2325 int java_lang_Throwable::_detailMessage_offset;
2326 int java_lang_Throwable::_stackTrace_offset;
2327 int java_lang_Throwable::_depth_offset;
2328 int java_lang_Throwable::_cause_offset;
2329 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2330
2331 #define THROWABLE_FIELDS_DO(macro) \
2332 macro(_backtrace_offset, k, "backtrace", object_signature, false); \
2333 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \
2334 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2335 macro(_depth_offset, k, "depth", int_signature, false); \
2336 macro(_cause_offset, k, "cause", throwable_signature, false); \
2337 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2338
2339 void java_lang_Throwable::compute_offsets() {
2340 InstanceKlass* k = vmClasses::Throwable_klass();
2341 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2342 }
2343
2344 #if INCLUDE_CDS
2345 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2346 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2347 }
2348 #endif
2349
2350 oop java_lang_Throwable::unassigned_stacktrace() {
2351 InstanceKlass* ik = vmClasses::Throwable_klass();
2352 oop base = ik->static_field_base_raw();
2353 return base->obj_field(_static_unassigned_stacktrace_offset);
2354 }
2355
2356 oop java_lang_Throwable::backtrace(oop throwable) {
2357 return throwable->obj_field_acquire(_backtrace_offset);
2358 }
2359
2360
2361 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2362 throwable->release_obj_field_put(_backtrace_offset, value);
2363 }
2364
2365 int java_lang_Throwable::depth(oop throwable) {
2366 return throwable->int_field(_depth_offset);
2367 }
2368
2369 void java_lang_Throwable::set_depth(oop throwable, int value) {
2370 throwable->int_field_put(_depth_offset, value);
2371 }
2372
2373 oop java_lang_Throwable::message(oop throwable) {
2374 return throwable->obj_field(_detailMessage_offset);
2375 }
2376
2377 const char* java_lang_Throwable::message_as_utf8(oop throwable) {
2378 oop msg = java_lang_Throwable::message(throwable);
2379 const char* msg_utf8 = nullptr;
2380 if (msg != nullptr) {
2381 msg_utf8 = java_lang_String::as_utf8_string(msg);
2382 }
2383 return msg_utf8;
2384 }
2385
2386 oop java_lang_Throwable::cause(oop throwable) {
2387 return throwable->obj_field(_cause_offset);
2388 }
2389
2390 void java_lang_Throwable::set_message(oop throwable, oop value) {
2391 throwable->obj_field_put(_detailMessage_offset, value);
2392 }
2393
2394
2395 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2396 throwable->obj_field_put(_stackTrace_offset, st_element_array);
2397 }
2398
2399 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2400 set_stacktrace(throwable, nullptr);
2401 }
2402
2403
2404 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2405 ResourceMark rm;
2406 Klass* k = throwable->klass();
2407 assert(k != nullptr, "just checking");
2408 st->print("%s", k->external_name());
2409 oop msg = message(throwable);
2410 if (msg != nullptr) {
2411 st->print(": %s", java_lang_String::as_utf8_string(msg));
2412 }
2413 }
2414
2415 // After this many redefines, the stack trace is unreliable.
2416 const int MAX_VERSION = USHRT_MAX;
2417
2418 static inline bool version_matches(Method* method, int version) {
2419 assert(version < MAX_VERSION, "version is too big");
2420 return method != nullptr && (method->constants()->version() == version);
2421 }
2422
2423 // This class provides a simple wrapper over the internal structure of
2424 // exception backtrace to insulate users of the backtrace from needing
2425 // to know what it looks like.
2426 // The code of this class is not GC safe. Allocations can only happen
2427 // in expand().
2428 class BacktraceBuilder: public StackObj {
2429 friend class BacktraceIterator;
2430 private:
2431 Handle _backtrace;
2432 objArrayOop _head;
2433 typeArrayOop _methods;
2434 typeArrayOop _bcis;
2435 objArrayOop _mirrors;
2436 typeArrayOop _names; // Needed to insulate method name against redefinition.
2437 // True if the top frame of the backtrace is omitted because it shall be hidden.
2438 bool _has_hidden_top_frame;
2439 int _index;
2440 NoSafepointVerifier _nsv;
2441
2442 enum {
2443 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2444 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2445 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2446 trace_names_offset = java_lang_Throwable::trace_names_offset,
2447 trace_conts_offset = java_lang_Throwable::trace_conts_offset,
2448 trace_next_offset = java_lang_Throwable::trace_next_offset,
2449 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2450 trace_size = java_lang_Throwable::trace_size,
2451 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2452 };
2453
2454 // get info out of chunks
2455 static typeArrayOop get_methods(objArrayHandle chunk) {
2456 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2457 assert(methods != nullptr, "method array should be initialized in backtrace");
2458 return methods;
2459 }
2460 static typeArrayOop get_bcis(objArrayHandle chunk) {
2461 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2462 assert(bcis != nullptr, "bci array should be initialized in backtrace");
2463 return bcis;
2464 }
2465 static objArrayOop get_mirrors(objArrayHandle chunk) {
2466 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2467 assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2468 return mirrors;
2469 }
2470 static typeArrayOop get_names(objArrayHandle chunk) {
2471 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2472 assert(names != nullptr, "names array should be initialized in backtrace");
2473 return names;
2474 }
2475 static bool has_hidden_top_frame(objArrayHandle chunk) {
2476 oop hidden = chunk->obj_at(trace_hidden_offset);
2477 return hidden != nullptr;
2478 }
2479
2480 public:
2481
2482 // constructor for new backtrace
2483 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2484 expand(CHECK);
2485 _backtrace = Handle(THREAD, _head);
2486 _index = 0;
2487 }
2488
2489 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2490 _methods = get_methods(backtrace);
2491 _bcis = get_bcis(backtrace);
2492 _mirrors = get_mirrors(backtrace);
2493 _names = get_names(backtrace);
2494 _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2495 assert(_methods->length() == _bcis->length() &&
2496 _methods->length() == _mirrors->length() &&
2497 _mirrors->length() == _names->length(),
2498 "method and source information arrays should match");
2499
2500 // head is the preallocated backtrace
2501 _head = backtrace();
2502 _backtrace = Handle(thread, _head);
2503 _index = 0;
2504 }
2505
2506 void expand(TRAPS) {
2507 objArrayHandle old_head(THREAD, _head);
2508 PauseNoSafepointVerifier pnsv(&_nsv);
2509
2510 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2511 objArrayHandle new_head(THREAD, head);
2512
2513 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2514 typeArrayHandle new_methods(THREAD, methods);
2515
2516 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2517 typeArrayHandle new_bcis(THREAD, bcis);
2518
2519 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2520 objArrayHandle new_mirrors(THREAD, mirrors);
2521
2522 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2523 typeArrayHandle new_names(THREAD, names);
2524
2525 if (!old_head.is_null()) {
2526 old_head->obj_at_put(trace_next_offset, new_head());
2527 }
2528 new_head->obj_at_put(trace_methods_offset, new_methods());
2529 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2530 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2531 new_head->obj_at_put(trace_names_offset, new_names());
2532 new_head->obj_at_put(trace_hidden_offset, nullptr);
2533
2534 _head = new_head();
2535 _methods = new_methods();
2536 _bcis = new_bcis();
2537 _mirrors = new_mirrors();
2538 _names = new_names();
2539 _index = 0;
2540 }
2541
2542 oop backtrace() {
2543 return _backtrace();
2544 }
2545
2546 inline void push(Method* method, int bci, TRAPS) {
2547 // Smear the -1 bci to 0 since the array only holds unsigned
2548 // shorts. The later line number lookup would just smear the -1
2549 // to a 0 even if it could be recorded.
2550 if (bci == SynchronizationEntryBCI) bci = 0;
2551
2552 if (_index >= trace_chunk_size) {
2553 methodHandle mhandle(THREAD, method);
2554 expand(CHECK);
2555 method = mhandle();
2556 }
2557
2558 _methods->ushort_at_put(_index, method->orig_method_idnum());
2559 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2560
2561 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2562 // klass owning the symbols alive so their refcounts aren't decremented.
2563 Symbol* name = method->name();
2564 _names->symbol_at_put(_index, name);
2565
2566 // We need to save the mirrors in the backtrace to keep the class
2567 // from being unloaded while we still have this stack trace.
2568 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2569 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2570
2571 _index++;
2572 }
2573
2574 void set_has_hidden_top_frame() {
2575 if (!_has_hidden_top_frame) {
2576 // It would be nice to add java/lang/Boolean::TRUE here
2577 // to indicate that this backtrace has a hidden top frame.
2578 // But this code is used before TRUE is allocated.
2579 // Therefore let's just use an arbitrary legal oop
2580 // available right here. _methods is a short[].
2581 assert(_methods != nullptr, "we need a legal oop");
2582 _has_hidden_top_frame = true;
2583 _head->obj_at_put(trace_hidden_offset, _methods);
2584 }
2585 }
2586 };
2587
2588 struct BacktraceElement : public StackObj {
2589 int _method_id;
2590 int _bci;
2591 int _version;
2592 Symbol* _name;
2593 Handle _mirror;
2594 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2595 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2596 };
2597
2598 class BacktraceIterator : public StackObj {
2599 int _index;
2600 objArrayHandle _result;
2601 objArrayHandle _mirrors;
2602 typeArrayHandle _methods;
2603 typeArrayHandle _bcis;
2604 typeArrayHandle _names;
2605
2606 void init(objArrayHandle result, Thread* thread) {
2607 // Get method id, bci, version and mirror from chunk
2608 _result = result;
2609 if (_result.not_null()) {
2610 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2611 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2612 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2613 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2614 _index = 0;
2615 }
2616 }
2617 public:
2618 BacktraceIterator(objArrayHandle result, Thread* thread) {
2619 init(result, thread);
2620 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2621 }
2622
2623 BacktraceElement next(Thread* thread) {
2624 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2625 _methods->ushort_at(_index),
2626 Backtrace::version_at(_bcis->int_at(_index)),
2627 Backtrace::bci_at(_bcis->int_at(_index)),
2628 _names->symbol_at(_index));
2629 _index++;
2630
2631 if (_index >= java_lang_Throwable::trace_chunk_size) {
2632 int next_offset = java_lang_Throwable::trace_next_offset;
2633 // Get next chunk
2634 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2635 init(result, thread);
2636 }
2637 return e;
2638 }
2639
2640 bool repeat() {
2641 return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2642 }
2643 };
2644
2645
2646 // Print stack trace element to the specified output stream.
2647 // The output is formatted into a stringStream and written to the outputStream in one step.
2648 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2649 int version, int bci, Symbol* name) {
2650 ResourceMark rm;
2651 stringStream ss;
2652
2653 InstanceKlass* holder = java_lang_Class::as_InstanceKlass(mirror());
2654 const char* klass_name = holder->external_name();
2655 char* method_name = name->as_C_string();
2656 ss.print("\tat %s.%s(", klass_name, method_name);
2657
2658 // Print module information
2659 ModuleEntry* module = holder->module();
2660 if (module->is_named()) {
2661 char* module_name = module->name()->as_C_string();
2662 if (module->version() != nullptr) {
2663 char* module_version = module->version()->as_C_string();
2664 ss.print("%s@%s/", module_name, module_version);
2665 } else {
2666 ss.print("%s/", module_name);
2667 }
2668 }
2669
2670 char* source_file_name = nullptr;
2671 Symbol* source = Backtrace::get_source_file_name(holder, version);
2672 if (source != nullptr) {
2673 source_file_name = source->as_C_string();
2674 }
2675
2676 // The method can be null if the requested class version is gone
2677 Method* method = holder->method_with_orig_idnum(method_id, version);
2678 if (!version_matches(method, version)) {
2679 ss.print("Redefined)");
2680 } else {
2681 int line_number = Backtrace::get_line_number(method, bci);
2682 if (line_number == -2) {
2683 ss.print("Native Method)");
2684 } else {
2685 if (source_file_name != nullptr && (line_number != -1)) {
2686 // Sourcename and linenumber
2687 ss.print("%s:%d)", source_file_name, line_number);
2688 } else if (source_file_name != nullptr) {
2689 // Just sourcename
2690 ss.print("%s)", source_file_name);
2691 } else {
2692 // Neither sourcename nor linenumber
2693 ss.print("Unknown Source)");
2694 }
2695 nmethod* nm = method->code();
2696 if (WizardMode && nm != nullptr) {
2697 ss.print("(nmethod " INTPTR_FORMAT ")", p2i(nm));
2698 }
2699 }
2700 }
2701
2702 ss.cr();
2703 st->print_raw(ss.freeze(), ss.size());
2704 }
2705
2706 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2707 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2708 int method_id = method->orig_method_idnum();
2709 int version = method->constants()->version();
2710 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2711 }
2712
2713 /**
2714 * Print the throwable message and its stack trace plus all causes by walking the
2715 * cause chain. The output looks the same as of Throwable.printStackTrace().
2716 */
2717 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2718 // First, print the message.
2719 print(throwable(), st);
2720 st->cr();
2721
2722 // Now print the stack trace.
2723 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2724 while (throwable.not_null()) {
2725 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2726 if (result.is_null()) {
2727 st->print_raw_cr("\t<<no stack trace available>>");
2728 return;
2729 }
2730 BacktraceIterator iter(result, THREAD);
2731
2732 while (iter.repeat()) {
2733 BacktraceElement bte = iter.next(THREAD);
2734 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2735 }
2736 if (THREAD->can_call_java()) {
2737 // Call getCause() which doesn't necessarily return the _cause field.
2738 ExceptionMark em(THREAD);
2739 JavaValue cause(T_OBJECT);
2740 JavaCalls::call_virtual(&cause,
2741 throwable,
2742 throwable->klass(),
2743 vmSymbols::getCause_name(),
2744 vmSymbols::void_throwable_signature(),
2745 THREAD);
2746 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2747 if (HAS_PENDING_EXCEPTION) {
2748 CLEAR_PENDING_EXCEPTION;
2749 throwable = Handle();
2750 } else {
2751 throwable = Handle(THREAD, cause.get_oop());
2752 if (throwable.not_null()) {
2753 st->print("Caused by: ");
2754 print(throwable(), st);
2755 st->cr();
2756 }
2757 }
2758 } else {
2759 st->print_raw_cr("<<cannot call Java to get cause>>");
2760 return;
2761 }
2762 }
2763 }
2764
2765 /**
2766 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2767 */
2768 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2769 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2770 JavaValue result(T_VOID);
2771 JavaCalls::call_virtual(&result,
2772 throwable,
2773 vmClasses::Throwable_klass(),
2774 vmSymbols::printStackTrace_name(),
2775 vmSymbols::void_method_signature(),
2776 THREAD);
2777 }
2778
2779 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2780 if (!StackTraceInThrowable) return;
2781 ResourceMark rm(THREAD);
2782
2783 // Start out by clearing the backtrace for this object, in case the VM
2784 // runs out of memory while allocating the stack trace
2785 set_backtrace(throwable(), nullptr);
2786 // Clear lazily constructed Java level stacktrace if refilling occurs
2787 // This is unnecessary in 1.7+ but harmless
2788 clear_stacktrace(throwable());
2789
2790 int max_depth = MaxJavaStackTraceDepth;
2791 JavaThread* thread = THREAD;
2792
2793 BacktraceBuilder bt(CHECK);
2794
2795 // If there is no Java frame just return the method that was being called
2796 // with bci 0
2797 if (!thread->has_last_Java_frame()) {
2798 if (max_depth >= 1 && method() != nullptr) {
2799 bt.push(method(), 0, CHECK);
2800 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2801 set_depth(throwable(), 1);
2802 set_backtrace(throwable(), bt.backtrace());
2803 }
2804 return;
2805 }
2806
2807 // Instead of using vframe directly, this version of fill_in_stack_trace
2808 // basically handles everything by hand. This significantly improved the
2809 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2810 // See bug 6333838 for more details.
2811 // The "ASSERT" here is to verify this method generates the exactly same stack
2812 // trace as utilizing vframe.
2813 #ifdef ASSERT
2814 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2815 #endif
2816 int total_count = 0;
2817 RegisterMap map(thread,
2818 RegisterMap::UpdateMap::skip,
2819 RegisterMap::ProcessFrames::skip,
2820 RegisterMap::WalkContinuation::include);
2821 int decode_offset = 0;
2822 nmethod* nm = nullptr;
2823 bool skip_fillInStackTrace_check = false;
2824 bool skip_throwableInit_check = false;
2825 bool skip_hidden = !ShowHiddenFrames;
2826 bool show_carrier = ShowCarrierFrames;
2827 ContinuationEntry* cont_entry = thread->last_continuation();
2828 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2829 Method* method = nullptr;
2830 int bci = 0;
2831
2832 // Compiled java method case.
2833 if (decode_offset != 0) {
2834 DebugInfoReadStream stream(nm, decode_offset);
2835 decode_offset = stream.read_int();
2836 method = (Method*)nm->metadata_at(stream.read_int());
2837 bci = stream.read_bci();
2838 } else {
2839 if (fr.is_first_frame()) break;
2840
2841 if (Continuation::is_continuation_enterSpecial(fr)) {
2842 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2843 if (!show_carrier && cont_entry->is_virtual_thread()) {
2844 break;
2845 }
2846 cont_entry = cont_entry->parent();
2847 }
2848
2849 address pc = fr.pc();
2850 if (fr.is_interpreted_frame()) {
2851 address bcp;
2852 if (!map.in_cont()) {
2853 bcp = fr.interpreter_frame_bcp();
2854 method = fr.interpreter_frame_method();
2855 } else {
2856 bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2857 method = map.stack_chunk()->interpreter_frame_method(fr);
2858 }
2859 bci = method->bci_from(bcp);
2860 fr = fr.sender(&map);
2861 } else {
2862 CodeBlob* cb = fr.cb();
2863 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2864 // but non nmethod
2865 fr = fr.sender(&map);
2866 if (cb == nullptr || !cb->is_nmethod()) {
2867 continue;
2868 }
2869 nm = cb->as_nmethod();
2870 assert(nm->method() != nullptr, "must be");
2871 if (nm->method()->is_native()) {
2872 method = nm->method();
2873 bci = 0;
2874 } else {
2875 PcDesc* pd = nm->pc_desc_at(pc);
2876 decode_offset = pd->scope_decode_offset();
2877 // if decode_offset is not equal to 0, it will execute the
2878 // "compiled java method case" at the beginning of the loop.
2879 continue;
2880 }
2881 }
2882 }
2883 #ifdef ASSERT
2884 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2885 assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2886 st.next();
2887 }
2888 #endif
2889
2890 // the format of the stacktrace will be:
2891 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2892 // - 0 or more <init> methods for the exception class (skipped)
2893 // - rest of the stack
2894
2895 if (!skip_fillInStackTrace_check) {
2896 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2897 throwable->is_a(method->method_holder())) {
2898 continue;
2899 }
2900 else {
2901 skip_fillInStackTrace_check = true; // gone past them all
2902 }
2903 }
2904 if (!skip_throwableInit_check) {
2905 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2906
2907 // skip <init> methods of the exception class and superclasses
2908 // This is similar to classic VM.
2909 if (method->is_object_constructor() &&
2910 throwable->is_a(method->method_holder())) {
2911 continue;
2912 } else {
2913 // there are none or we've seen them all - either way stop checking
2914 skip_throwableInit_check = true;
2915 }
2916 }
2917 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2918 if (skip_hidden) {
2919 if (total_count == 0) {
2920 // The top frame will be hidden from the stack trace.
2921 bt.set_has_hidden_top_frame();
2922 }
2923 continue;
2924 }
2925 }
2926
2927 bt.push(method, bci, CHECK);
2928 total_count++;
2929 }
2930
2931 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2932
2933 // Put completed stack trace into throwable object
2934 set_backtrace(throwable(), bt.backtrace());
2935 set_depth(throwable(), total_count);
2936 }
2937
2938 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2939 // No-op if stack trace is disabled
2940 if (!StackTraceInThrowable) {
2941 return;
2942 }
2943
2944 // Disable stack traces for some preallocated out of memory errors
2945 if (!Universe::should_fill_in_stack_trace(throwable)) {
2946 return;
2947 }
2948
2949 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2950 PreserveExceptionMark pm(THREAD);
2951
2952 fill_in_stack_trace(throwable, method, THREAD);
2953 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2954 // original exception via the PreserveExceptionMark destructor.
2955 CLEAR_PENDING_EXCEPTION;
2956 }
2957
2958 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2959 // Allocate stack trace - backtrace is created but not filled in
2960
2961 // No-op if stack trace is disabled
2962 if (!StackTraceInThrowable) return;
2963 BacktraceBuilder bt(CHECK); // creates a backtrace
2964 set_backtrace(throwable(), bt.backtrace());
2965 }
2966
2967
2968 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2969 // Fill in stack trace into preallocated backtrace (no GC)
2970
2971 // No-op if stack trace is disabled
2972 if (!StackTraceInThrowable) return;
2973
2974 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2975
2976 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2977
2978 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2979 assert(backtrace.not_null(), "backtrace should have been preallocated");
2980
2981 ResourceMark rm(THREAD);
2982 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2983
2984 BacktraceBuilder bt(THREAD, backtrace);
2985
2986 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2987 // methods as preallocated errors aren't created by "java" code.
2988
2989 // fill in as much stack trace as possible
2990 int chunk_count = 0;
2991 for (;!st.at_end(); st.next()) {
2992 bt.push(st.method(), st.bci(), CHECK);
2993 chunk_count++;
2994
2995 // Bail-out for deep stacks
2996 if (chunk_count >= trace_chunk_size) break;
2997 }
2998 set_depth(throwable(), chunk_count);
2999 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
3000
3001 // We support the Throwable immutability protocol defined for Java 7.
3002 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
3003 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
3004 }
3005
3006 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
3007 objArrayHandle stack_trace_array_h, TRAPS) {
3008
3009 if (backtrace.is_null() || stack_trace_array_h.is_null()) {
3010 THROW(vmSymbols::java_lang_NullPointerException());
3011 }
3012
3013 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
3014
3015 if (stack_trace_array_h->length() != depth) {
3016 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
3017 }
3018
3019 objArrayHandle result(THREAD, objArrayOop(backtrace()));
3020 BacktraceIterator iter(result, THREAD);
3021
3022 int index = 0;
3023 while (iter.repeat()) {
3024 BacktraceElement bte = iter.next(THREAD);
3025
3026 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
3027
3028 if (stack_trace_element.is_null()) {
3029 THROW(vmSymbols::java_lang_NullPointerException());
3030 }
3031
3032 InstanceKlass* holder = java_lang_Class::as_InstanceKlass(bte._mirror());
3033 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
3034
3035 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
3036 method,
3037 bte._version,
3038 bte._bci,
3039 bte._name,
3040 CHECK);
3041 }
3042 }
3043
3044 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
3045 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
3046 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
3047 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
3048 // symbolic stacktrace of 'throwable'.
3049 assert(throwable.not_null(), "shouldn't be");
3050
3051 // Now create the message from the original exception and thread name.
3052 ResourceMark rm(current);
3053 const char *message = nullptr;
3054 oop detailed_message = java_lang_Throwable::message(throwable());
3055 if (detailed_message != nullptr) {
3056 message = java_lang_String::as_utf8_string(detailed_message);
3057 }
3058 stringStream st;
3059 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
3060 message == nullptr ? "" : ":");
3061 if (message == nullptr) {
3062 st.print("[in thread \"%s\"]", current->name());
3063 } else {
3064 st.print("%s [in thread \"%s\"]", message, current->name());
3065 }
3066
3067 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
3068 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
3069 // If new_exception returns a different exception while creating the exception,
3070 // abandon the attempt to save the initialization error and return null.
3071 if (init_error->klass()->name() != exception_name) {
3072 log_info(class, init)("Exception %s thrown while saving initialization exception",
3073 init_error->klass()->external_name());
3074 return Handle();
3075 }
3076
3077 // Call to java to fill in the stack trace and clear declaringClassObject to
3078 // not keep classes alive in the stack trace.
3079 // call this: public StackTraceElement[] getStackTrace()
3080 JavaValue result(T_ARRAY);
3081 JavaCalls::call_virtual(&result, throwable,
3082 vmClasses::Throwable_klass(),
3083 vmSymbols::getStackTrace_name(),
3084 vmSymbols::getStackTrace_signature(),
3085 current);
3086 if (!current->has_pending_exception()){
3087 Handle stack_trace(current, result.get_oop());
3088 assert(stack_trace->is_objArray(), "Should be an array");
3089 java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
3090 // Clear backtrace because the stacktrace should be used instead.
3091 set_backtrace(init_error(), nullptr);
3092 } else {
3093 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
3094 init_error->klass()->external_name());
3095 current->clear_pending_exception();
3096 }
3097
3098 return init_error;
3099 }
3100
3101 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
3102 JavaThread* current = JavaThread::current();
3103 objArrayHandle result(current, objArrayOop(backtrace(throwable)));
3104 BacktraceIterator iter(result, current);
3105 // No backtrace available.
3106 if (!iter.repeat()) return false;
3107
3108 // If the exception happened in a frame that has been hidden, i.e.,
3109 // omitted from the back trace, we can not compute the message.
3110 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
3111 if (hidden != nullptr) {
3112 return false;
3113 }
3114
3115 // Get first backtrace element.
3116 BacktraceElement bte = iter.next(current);
3117
3118 InstanceKlass* holder = java_lang_Class::as_InstanceKlass(bte._mirror());
3119 assert(holder != nullptr, "first element should be non-null");
3120 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
3121
3122 // Original version is no longer available.
3123 if (m == nullptr || !version_matches(m, bte._version)) {
3124 return false;
3125 }
3126
3127 *method = m;
3128 *bci = bte._bci;
3129 return true;
3130 }
3131
3132 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
3133 // Allocate java.lang.StackTraceElement instance
3134 InstanceKlass* k = vmClasses::StackTraceElement_klass();
3135 assert(k != nullptr, "must be loaded in 1.4+");
3136 if (k->should_be_initialized()) {
3137 k->initialize(CHECK_NULL);
3138 }
3139
3140 Handle element = k->allocate_instance_handle(CHECK_NULL);
3141
3142 int version = method->constants()->version();
3143 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
3144 return element();
3145 }
3146
3147 void java_lang_StackTraceElement::fill_in(Handle element,
3148 InstanceKlass* holder, const methodHandle& method,
3149 int version, int bci, Symbol* name, TRAPS) {
3150 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
3151
3152 ResourceMark rm(THREAD);
3153 HandleMark hm(THREAD);
3154
3155 // Fill in class name
3156 Handle java_class(THREAD, holder->java_mirror());
3157 oop classname = java_lang_Class::name(java_class, CHECK);
3158 java_lang_StackTraceElement::set_declaringClass(element(), classname);
3159 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
3160
3161 oop loader = holder->class_loader();
3162 if (loader != nullptr) {
3163 oop loader_name = java_lang_ClassLoader::name(loader);
3164 if (loader_name != nullptr)
3165 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
3166 }
3167
3168 // Fill in method name
3169 oop methodname = StringTable::intern(name, CHECK);
3170 java_lang_StackTraceElement::set_methodName(element(), methodname);
3171
3172 // Fill in module name and version
3173 ModuleEntry* module = holder->module();
3174 if (module->is_named()) {
3175 oop module_name = StringTable::intern(module->name(), CHECK);
3176 java_lang_StackTraceElement::set_moduleName(element(), module_name);
3177 oop module_version;
3178 if (module->version() != nullptr) {
3179 module_version = StringTable::intern(module->version(), CHECK);
3180 } else {
3181 module_version = nullptr;
3182 }
3183 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
3184 }
3185
3186 if (method() == nullptr || !version_matches(method(), version)) {
3187 // The method was redefined, accurate line number information isn't available
3188 java_lang_StackTraceElement::set_fileName(element(), nullptr);
3189 java_lang_StackTraceElement::set_lineNumber(element(), -1);
3190 } else {
3191 Symbol* source;
3192 oop source_file;
3193 int line_number;
3194 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
3195
3196 java_lang_StackTraceElement::set_fileName(element(), source_file);
3197 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
3198 }
3199 }
3200
3201 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
3202 InstanceKlass* holder,
3203 int version,
3204 const methodHandle& method,
3205 int bci,
3206 Symbol*& source,
3207 oop& source_file,
3208 int& line_number, TRAPS) {
3209 // Fill in source file name and line number.
3210 source = Backtrace::get_source_file_name(holder, version);
3211 source_file = java_lang_Class::source_file(java_class());
3212 if (source != nullptr) {
3213 // Class was not redefined. We can trust its cache if set,
3214 // else we have to initialize it.
3215 if (source_file == nullptr) {
3216 source_file = StringTable::intern(source, CHECK);
3217 java_lang_Class::set_source_file(java_class(), source_file);
3218 }
3219 } else {
3220 // Class was redefined. Dump the cache if it was set.
3221 if (source_file != nullptr) {
3222 source_file = nullptr;
3223 java_lang_Class::set_source_file(java_class(), source_file);
3224 }
3225 }
3226 line_number = Backtrace::get_line_number(method(), bci);
3227 }
3228
3229 #if INCLUDE_JVMCI
3230 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
3231 Symbol*& filename, int& line_number, TRAPS) {
3232 ResourceMark rm(THREAD);
3233 HandleMark hm(THREAD);
3234
3235 filename = nullptr;
3236 line_number = -1;
3237
3238 oop source_file;
3239 int version = method->constants()->version();
3240 InstanceKlass* holder = method->method_holder();
3241 Handle java_class(THREAD, holder->java_mirror());
3242 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
3243 }
3244 #endif // INCLUDE_JVMCI
3245
3246 // java_lang_ClassFrameInfo
3247
3248 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
3249 int java_lang_ClassFrameInfo::_flags_offset;
3250
3251 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
3252 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \
3253 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false)
3254
3255 void java_lang_ClassFrameInfo::compute_offsets() {
3256 InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
3257 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3258 }
3259
3260 #if INCLUDE_CDS
3261 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
3262 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3263 }
3264 #endif
3265
3266 static int get_flags(const methodHandle& m) {
3267 int flags = m->access_flags().as_method_flags();
3268 if (m->is_object_constructor()) {
3269 flags |= java_lang_invoke_MemberName::MN_IS_OBJECT_CONSTRUCTOR;
3270 } else {
3271 // Note: Static initializers can be here. Record them as plain methods.
3272 flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
3273 }
3274 if (m->caller_sensitive()) {
3275 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
3276 }
3277 if (m->is_hidden()) {
3278 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3279 }
3280 assert((flags & 0xFF000000) == 0, "unexpected flags");
3281 return flags;
3282 }
3283
3284 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3285 return obj->obj_field(_classOrMemberName_offset);
3286 }
3287
3288 int java_lang_ClassFrameInfo::flags(oop obj) {
3289 return obj->int_field(_flags_offset);
3290 }
3291
3292 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3293 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3294 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3295 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3296 stackFrame->int_field_put(_flags_offset, flags);
3297 }
3298
3299 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3300 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3301 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3302 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3303 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3304 stackFrame->int_field_put(_flags_offset, flags);
3305 }
3306
3307
3308 // java_lang_StackFrameInfo
3309
3310 int java_lang_StackFrameInfo::_type_offset;
3311 int java_lang_StackFrameInfo::_name_offset;
3312 int java_lang_StackFrameInfo::_bci_offset;
3313 int java_lang_StackFrameInfo::_version_offset;
3314 int java_lang_StackFrameInfo::_contScope_offset;
3315
3316 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3317 macro(_type_offset, k, "type", object_signature, false); \
3318 macro(_name_offset, k, "name", string_signature, false); \
3319 macro(_bci_offset, k, "bci", int_signature, false); \
3320 macro(_contScope_offset, k, "contScope", continuationscope_signature, false)
3321
3322 void java_lang_StackFrameInfo::compute_offsets() {
3323 InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3324 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3325 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3326 }
3327
3328 #if INCLUDE_CDS
3329 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3330 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3331 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3332 }
3333 #endif
3334
3335 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3336 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3337 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3338 return method;
3339 }
3340
3341 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3342 // set Method* or mid/cpref
3343 HandleMark hm(THREAD);
3344 Handle cont_h(THREAD, cont);
3345 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3346
3347 // set bci
3348 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3349 // method may be redefined; store the version
3350 int version = method->constants()->version();
3351 assert((jushort)version == version, "version should be short");
3352 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3353
3354 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3355 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3356 }
3357
3358 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3359 ResourceMark rm(THREAD);
3360 HandleMark hm(THREAD);
3361
3362 Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3363 InstanceKlass* holder = method->method_holder();
3364 short version = stackFrame->short_field(_version_offset);
3365 int bci = stackFrame->int_field(_bci_offset);
3366 Symbol* name = method->name();
3367 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3368 }
3369
3370 oop java_lang_StackFrameInfo::type(oop obj) {
3371 return obj->obj_field(_type_offset);
3372 }
3373
3374 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3375 obj->obj_field_put(_type_offset, value);
3376 }
3377
3378 oop java_lang_StackFrameInfo::name(oop obj) {
3379 return obj->obj_field(_name_offset);
3380 }
3381
3382 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3383 obj->obj_field_put(_name_offset, value);
3384 }
3385
3386 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3387 obj->short_field_put(_version_offset, value);
3388 }
3389
3390 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3391 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3392 obj->int_field_put(_bci_offset, value);
3393 }
3394
3395 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3396 obj->obj_field_put(_contScope_offset, value);
3397 }
3398
3399 int java_lang_LiveStackFrameInfo::_monitors_offset;
3400 int java_lang_LiveStackFrameInfo::_locals_offset;
3401 int java_lang_LiveStackFrameInfo::_operands_offset;
3402 int java_lang_LiveStackFrameInfo::_mode_offset;
3403
3404 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3405 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
3406 macro(_locals_offset, k, "locals", object_array_signature, false); \
3407 macro(_operands_offset, k, "operands", object_array_signature, false); \
3408 macro(_mode_offset, k, "mode", int_signature, false)
3409
3410 void java_lang_LiveStackFrameInfo::compute_offsets() {
3411 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3412 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3413 }
3414
3415 #if INCLUDE_CDS
3416 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3417 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3418 }
3419 #endif
3420
3421 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3422 obj->obj_field_put(_monitors_offset, value);
3423 }
3424
3425 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3426 obj->obj_field_put(_locals_offset, value);
3427 }
3428
3429 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3430 obj->obj_field_put(_operands_offset, value);
3431 }
3432
3433 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3434 obj->int_field_put(_mode_offset, value);
3435 }
3436
3437
3438 // java_lang_AccessibleObject
3439
3440 int java_lang_reflect_AccessibleObject::_override_offset;
3441
3442 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3443 macro(_override_offset, k, "override", bool_signature, false)
3444
3445 void java_lang_reflect_AccessibleObject::compute_offsets() {
3446 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3447 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3448 }
3449
3450 #if INCLUDE_CDS
3451 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3452 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3453 }
3454 #endif
3455
3456 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3457 return (jboolean) reflect->bool_field(_override_offset);
3458 }
3459
3460 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3461 reflect->bool_field_put(_override_offset, (int) value);
3462 }
3463
3464 // java_lang_reflect_Method
3465
3466 int java_lang_reflect_Method::_clazz_offset;
3467 int java_lang_reflect_Method::_name_offset;
3468 int java_lang_reflect_Method::_returnType_offset;
3469 int java_lang_reflect_Method::_parameterTypes_offset;
3470 int java_lang_reflect_Method::_exceptionTypes_offset;
3471 int java_lang_reflect_Method::_slot_offset;
3472 int java_lang_reflect_Method::_modifiers_offset;
3473 int java_lang_reflect_Method::_signature_offset;
3474 int java_lang_reflect_Method::_annotations_offset;
3475 int java_lang_reflect_Method::_parameter_annotations_offset;
3476 int java_lang_reflect_Method::_annotation_default_offset;
3477
3478 #define METHOD_FIELDS_DO(macro) \
3479 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3480 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3481 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
3482 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3483 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3484 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3485 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3486 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3487 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3488 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3489 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
3490
3491 void java_lang_reflect_Method::compute_offsets() {
3492 InstanceKlass* k = vmClasses::reflect_Method_klass();
3493 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3494 }
3495
3496 #if INCLUDE_CDS
3497 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3498 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3499 }
3500 #endif
3501
3502 Handle java_lang_reflect_Method::create(TRAPS) {
3503 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3504 InstanceKlass* klass = vmClasses::reflect_Method_klass();
3505 // This class is eagerly initialized during VM initialization, since we keep a reference
3506 // to one of the methods
3507 assert(klass->is_initialized(), "must be initialized");
3508 return klass->allocate_instance_handle(THREAD);
3509 }
3510
3511 oop java_lang_reflect_Method::clazz(oop reflect) {
3512 return reflect->obj_field(_clazz_offset);
3513 }
3514
3515 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3516 reflect->obj_field_put(_clazz_offset, value);
3517 }
3518
3519 int java_lang_reflect_Method::slot(oop reflect) {
3520 return reflect->int_field(_slot_offset);
3521 }
3522
3523 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3524 reflect->int_field_put(_slot_offset, value);
3525 }
3526
3527 void java_lang_reflect_Method::set_name(oop method, oop value) {
3528 method->obj_field_put(_name_offset, value);
3529 }
3530
3531 oop java_lang_reflect_Method::return_type(oop method) {
3532 return method->obj_field(_returnType_offset);
3533 }
3534
3535 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3536 method->obj_field_put(_returnType_offset, value);
3537 }
3538
3539 oop java_lang_reflect_Method::parameter_types(oop method) {
3540 return method->obj_field(_parameterTypes_offset);
3541 }
3542
3543 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3544 method->obj_field_put(_parameterTypes_offset, value);
3545 }
3546
3547 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3548 method->obj_field_put(_exceptionTypes_offset, value);
3549 }
3550
3551 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3552 method->int_field_put(_modifiers_offset, value);
3553 }
3554
3555 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3556 method->obj_field_put(_signature_offset, value);
3557 }
3558
3559 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3560 method->obj_field_put(_annotations_offset, value);
3561 }
3562
3563 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3564 method->obj_field_put(_parameter_annotations_offset, value);
3565 }
3566
3567 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3568 method->obj_field_put(_annotation_default_offset, value);
3569 }
3570
3571 int java_lang_reflect_Constructor::_clazz_offset;
3572 int java_lang_reflect_Constructor::_parameterTypes_offset;
3573 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3574 int java_lang_reflect_Constructor::_slot_offset;
3575 int java_lang_reflect_Constructor::_modifiers_offset;
3576 int java_lang_reflect_Constructor::_signature_offset;
3577 int java_lang_reflect_Constructor::_annotations_offset;
3578 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3579
3580 #define CONSTRUCTOR_FIELDS_DO(macro) \
3581 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3582 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3583 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3584 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3585 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3586 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3587 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3588 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3589
3590 void java_lang_reflect_Constructor::compute_offsets() {
3591 InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3592 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3593 }
3594
3595 #if INCLUDE_CDS
3596 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3597 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3598 }
3599 #endif
3600
3601 Handle java_lang_reflect_Constructor::create(TRAPS) {
3602 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3603 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3604 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3605 InstanceKlass* ik = InstanceKlass::cast(k);
3606 // Ensure it is initialized
3607 ik->initialize(CHECK_NH);
3608 return ik->allocate_instance_handle(THREAD);
3609 }
3610
3611 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3612 return reflect->obj_field(_clazz_offset);
3613 }
3614
3615 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3616 reflect->obj_field_put(_clazz_offset, value);
3617 }
3618
3619 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3620 return constructor->obj_field(_parameterTypes_offset);
3621 }
3622
3623 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3624 constructor->obj_field_put(_parameterTypes_offset, value);
3625 }
3626
3627 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3628 constructor->obj_field_put(_exceptionTypes_offset, value);
3629 }
3630
3631 int java_lang_reflect_Constructor::slot(oop reflect) {
3632 return reflect->int_field(_slot_offset);
3633 }
3634
3635 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3636 reflect->int_field_put(_slot_offset, value);
3637 }
3638
3639 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3640 constructor->int_field_put(_modifiers_offset, value);
3641 }
3642
3643 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3644 constructor->obj_field_put(_signature_offset, value);
3645 }
3646
3647 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3648 constructor->obj_field_put(_annotations_offset, value);
3649 }
3650
3651 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3652 method->obj_field_put(_parameter_annotations_offset, value);
3653 }
3654
3655 int java_lang_reflect_Field::_clazz_offset;
3656 int java_lang_reflect_Field::_name_offset;
3657 int java_lang_reflect_Field::_type_offset;
3658 int java_lang_reflect_Field::_slot_offset;
3659 int java_lang_reflect_Field::_modifiers_offset;
3660 int java_lang_reflect_Field::_flags_offset;
3661 int java_lang_reflect_Field::_signature_offset;
3662 int java_lang_reflect_Field::_annotations_offset;
3663
3664 #define FIELD_FIELDS_DO(macro) \
3665 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3666 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3667 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \
3668 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3669 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3670 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3671 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3672 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3673
3674 void java_lang_reflect_Field::compute_offsets() {
3675 InstanceKlass* k = vmClasses::reflect_Field_klass();
3676 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3677 }
3678
3679 #if INCLUDE_CDS
3680 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3681 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3682 }
3683 #endif
3684
3685 Handle java_lang_reflect_Field::create(TRAPS) {
3686 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3687 Symbol* name = vmSymbols::java_lang_reflect_Field();
3688 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3689 InstanceKlass* ik = InstanceKlass::cast(k);
3690 // Ensure it is initialized
3691 ik->initialize(CHECK_NH);
3692 return ik->allocate_instance_handle(THREAD);
3693 }
3694
3695 oop java_lang_reflect_Field::clazz(oop reflect) {
3696 return reflect->obj_field(_clazz_offset);
3697 }
3698
3699 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3700 reflect->obj_field_put(_clazz_offset, value);
3701 }
3702
3703 oop java_lang_reflect_Field::name(oop field) {
3704 return field->obj_field(_name_offset);
3705 }
3706
3707 void java_lang_reflect_Field::set_name(oop field, oop value) {
3708 field->obj_field_put(_name_offset, value);
3709 }
3710
3711 oop java_lang_reflect_Field::type(oop field) {
3712 return field->obj_field(_type_offset);
3713 }
3714
3715 void java_lang_reflect_Field::set_type(oop field, oop value) {
3716 field->obj_field_put(_type_offset, value);
3717 }
3718
3719 int java_lang_reflect_Field::slot(oop reflect) {
3720 return reflect->int_field(_slot_offset);
3721 }
3722
3723 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3724 reflect->int_field_put(_slot_offset, value);
3725 }
3726
3727 int java_lang_reflect_Field::modifiers(oop field) {
3728 return field->int_field(_modifiers_offset);
3729 }
3730
3731 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3732 field->int_field_put(_modifiers_offset, value);
3733 }
3734
3735 void java_lang_reflect_Field::set_flags(oop field, int value) {
3736 field->int_field_put(_flags_offset, value);
3737 }
3738
3739 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3740 field->obj_field_put(_signature_offset, value);
3741 }
3742
3743 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3744 field->obj_field_put(_annotations_offset, value);
3745 }
3746
3747 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3748 // Allocate java.lang.reflect.RecordComponent instance
3749 HandleMark hm(THREAD);
3750 InstanceKlass* ik = vmClasses::RecordComponent_klass();
3751 assert(ik != nullptr, "must be loaded");
3752 ik->initialize(CHECK_NULL);
3753
3754 Handle element = ik->allocate_instance_handle(CHECK_NULL);
3755
3756 Handle decl_class(THREAD, holder->java_mirror());
3757 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3758
3759 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3760 oop component_name = StringTable::intern(name, CHECK_NULL);
3761 java_lang_reflect_RecordComponent::set_name(element(), component_name);
3762
3763 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3764 Handle component_type_h =
3765 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3766 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3767
3768 Method* accessor_method = nullptr;
3769 {
3770 // Prepend "()" to type to create the full method signature.
3771 ResourceMark rm(THREAD);
3772 int sig_len = type->utf8_length() + 3; // "()" and null char
3773 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3774 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3775 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3776 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3777 }
3778
3779 if (accessor_method != nullptr) {
3780 methodHandle method(THREAD, accessor_method);
3781 oop m = Reflection::new_method(method, false, CHECK_NULL);
3782 java_lang_reflect_RecordComponent::set_accessor(element(), m);
3783 } else {
3784 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3785 }
3786
3787 int sig_index = component->generic_signature_index();
3788 if (sig_index > 0) {
3789 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3790 oop component_sig = StringTable::intern(sig, CHECK_NULL);
3791 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3792 } else {
3793 java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3794 }
3795
3796 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3797 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3798
3799 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3800 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3801
3802 return element();
3803 }
3804
3805 int reflect_ConstantPool::_vmholder_offset;
3806
3807 void reflect_ConstantPool::compute_offsets() {
3808 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3809 // The field is injected and called Object vmholder in the jdk.internal.reflect.ConstantPool class.
3810 CONSTANTPOOL_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3811 }
3812
3813 #if INCLUDE_CDS
3814 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3815 CONSTANTPOOL_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3816 }
3817 #endif
3818
3819 int java_lang_reflect_Parameter::_name_offset;
3820 int java_lang_reflect_Parameter::_modifiers_offset;
3821 int java_lang_reflect_Parameter::_index_offset;
3822 int java_lang_reflect_Parameter::_executable_offset;
3823
3824 #define PARAMETER_FIELDS_DO(macro) \
3825 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3826 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3827 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \
3828 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3829
3830 void java_lang_reflect_Parameter::compute_offsets() {
3831 InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3832 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3833 }
3834
3835 #if INCLUDE_CDS
3836 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3837 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3838 }
3839 #endif
3840
3841 Handle java_lang_reflect_Parameter::create(TRAPS) {
3842 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3843 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3844 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3845 InstanceKlass* ik = InstanceKlass::cast(k);
3846 // Ensure it is initialized
3847 ik->initialize(CHECK_NH);
3848 return ik->allocate_instance_handle(THREAD);
3849 }
3850
3851 oop java_lang_reflect_Parameter::name(oop param) {
3852 return param->obj_field(_name_offset);
3853 }
3854
3855 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3856 param->obj_field_put(_name_offset, value);
3857 }
3858
3859 int java_lang_reflect_Parameter::modifiers(oop param) {
3860 return param->int_field(_modifiers_offset);
3861 }
3862
3863 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3864 param->int_field_put(_modifiers_offset, value);
3865 }
3866
3867 int java_lang_reflect_Parameter::index(oop param) {
3868 return param->int_field(_index_offset);
3869 }
3870
3871 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3872 param->int_field_put(_index_offset, value);
3873 }
3874
3875 oop java_lang_reflect_Parameter::executable(oop param) {
3876 return param->obj_field(_executable_offset);
3877 }
3878
3879 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3880 param->obj_field_put(_executable_offset, value);
3881 }
3882
3883 // java_lang_Module
3884
3885 int java_lang_Module::_loader_offset;
3886 int java_lang_Module::_name_offset;
3887 int java_lang_Module::_module_entry_offset;
3888
3889 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3890 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3891 return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3892 vmSymbols::java_lang_module_init_signature(),
3893 loader, module_name, CHECK_NH);
3894 }
3895
3896 #define MODULE_FIELDS_DO(macro) \
3897 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3898 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false)
3899
3900 void java_lang_Module::compute_offsets() {
3901 InstanceKlass* k = vmClasses::Module_klass();
3902 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3903 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3904 }
3905
3906 #if INCLUDE_CDS
3907 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3908 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3909 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3910 }
3911 #endif
3912
3913 oop java_lang_Module::loader(oop module) {
3914 return module->obj_field(_loader_offset);
3915 }
3916
3917 void java_lang_Module::set_loader(oop module, oop value) {
3918 module->obj_field_put(_loader_offset, value);
3919 }
3920
3921 oop java_lang_Module::name(oop module) {
3922 return module->obj_field(_name_offset);
3923 }
3924
3925 void java_lang_Module::set_name(oop module, oop value) {
3926 module->obj_field_put(_name_offset, value);
3927 }
3928
3929 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3930 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3931 assert(module != nullptr, "module can't be null");
3932 assert(oopDesc::is_oop(module), "module must be oop");
3933
3934 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3935 return module_entry;
3936 }
3937
3938 ModuleEntry* java_lang_Module::module_entry(oop module) {
3939 ModuleEntry* module_entry = module_entry_raw(module);
3940 if (module_entry == nullptr) {
3941 // If the inject field containing the ModuleEntry* is null then return the
3942 // class loader's unnamed module.
3943 oop loader = java_lang_Module::loader(module);
3944 Handle h_loader = Handle(Thread::current(), loader);
3945 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3946 return loader_cld->unnamed_module();
3947 }
3948 return module_entry;
3949 }
3950
3951 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3952 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3953 assert(module != nullptr, "module can't be null");
3954 assert(oopDesc::is_oop(module), "module must be oop");
3955 module->address_field_put(_module_entry_offset, (address)module_entry);
3956 }
3957
3958 Handle reflect_ConstantPool::create(TRAPS) {
3959 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3960 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3961 // Ensure it is initialized
3962 k->initialize(CHECK_NH);
3963 return k->allocate_instance_handle(THREAD);
3964 }
3965
3966
3967 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3968 assert(_vmholder_offset != 0, "Uninitialized vmholder");
3969 oop mirror = value->pool_holder()->java_mirror();
3970 // Save the mirror to get back the constant pool.
3971 reflect->obj_field_put(_vmholder_offset, mirror);
3972 }
3973
3974 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3975 assert(_vmholder_offset != 0, "Uninitialized vmholder");
3976 oop mirror = reflect->obj_field(_vmholder_offset);
3977 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(mirror);
3978
3979 // Get the constant pool back from the klass. Since class redefinition
3980 // merges the new constant pool into the old, this is essentially the
3981 // same constant pool as the original. If constant pool merging is
3982 // no longer done in the future, this will have to change to save
3983 // the original.
3984 return ik->constants();
3985 }
3986
3987
3988 // Support for java_lang_ref_Reference
3989
3990 bool java_lang_ref_Reference::_offsets_initialized;
3991
3992 int java_lang_ref_Reference::_referent_offset;
3993 int java_lang_ref_Reference::_queue_offset;
3994 int java_lang_ref_Reference::_next_offset;
3995 int java_lang_ref_Reference::_discovered_offset;
3996
3997 #define REFERENCE_FIELDS_DO(macro) \
3998 macro(_referent_offset, k, "referent", object_signature, false); \
3999 macro(_queue_offset, k, "queue", referencequeue_signature, false); \
4000 macro(_next_offset, k, "next", reference_signature, false); \
4001 macro(_discovered_offset, k, "discovered", reference_signature, false);
4002
4003 void java_lang_ref_Reference::compute_offsets() {
4004 if (_offsets_initialized) {
4005 return;
4006 }
4007 _offsets_initialized = true;
4008 InstanceKlass* k = vmClasses::Reference_klass();
4009 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4010 }
4011
4012 #if INCLUDE_CDS
4013 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
4014 f->do_bool(&_offsets_initialized);
4015 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4016 }
4017 #endif
4018
4019 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
4020 assert(obj != nullptr, "sanity");
4021 if (offset != _referent_offset) {
4022 return false;
4023 }
4024
4025 Klass* k = obj->klass();
4026 if (!k->is_instance_klass()) {
4027 return false;
4028 }
4029
4030 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
4031 bool is_reference = ik->reference_type() != REF_NONE;
4032 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
4033 return is_reference;
4034 }
4035
4036 int* java_lang_boxing_object::_offsets;
4037
4038 #define BOXING_FIELDS_DO(macro) \
4039 macro(java_lang_boxing_object::_offsets[T_BOOLEAN - T_BOOLEAN], vmClasses::Boolean_klass(), "value", bool_signature, false); \
4040 macro(java_lang_boxing_object::_offsets[T_CHAR - T_BOOLEAN], vmClasses::Character_klass(), "value", char_signature, false); \
4041 macro(java_lang_boxing_object::_offsets[T_FLOAT - T_BOOLEAN], vmClasses::Float_klass(), "value", float_signature, false); \
4042 macro(java_lang_boxing_object::_offsets[T_DOUBLE - T_BOOLEAN], vmClasses::Double_klass(), "value", double_signature, false); \
4043 macro(java_lang_boxing_object::_offsets[T_BYTE - T_BOOLEAN], vmClasses::Byte_klass(), "value", byte_signature, false); \
4044 macro(java_lang_boxing_object::_offsets[T_SHORT - T_BOOLEAN], vmClasses::Short_klass(), "value", short_signature, false); \
4045 macro(java_lang_boxing_object::_offsets[T_INT - T_BOOLEAN], vmClasses::Integer_klass(), "value", int_signature, false); \
4046 macro(java_lang_boxing_object::_offsets[T_LONG - T_BOOLEAN], vmClasses::Long_klass(), "value", long_signature, false);
4047
4048 void java_lang_boxing_object::compute_offsets() {
4049 assert(T_LONG - T_BOOLEAN == 7, "Sanity check");
4050 java_lang_boxing_object::_offsets = NEW_C_HEAP_ARRAY(int, 8, mtInternal);
4051 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4052 }
4053
4054 #if INCLUDE_CDS
4055 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
4056 if (f->reading()) {
4057 assert(T_LONG - T_BOOLEAN == 7, "Sanity check");
4058 java_lang_boxing_object::_offsets = NEW_C_HEAP_ARRAY(int, 8, mtInternal);
4059 }
4060 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4061 }
4062 #endif
4063
4064 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
4065 Klass* k = vmClasses::box_klass(type);
4066 if (k == nullptr) return nullptr;
4067 InstanceKlass* ik = InstanceKlass::cast(k);
4068 if (!ik->is_initialized()) {
4069 ik->initialize(CHECK_NULL);
4070 }
4071 return ik->allocate_instance(THREAD);
4072 }
4073
4074
4075 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
4076 oop box = initialize_and_allocate(type, CHECK_NULL);
4077 if (box == nullptr) return nullptr;
4078 switch (type) {
4079 case T_BOOLEAN:
4080 box->bool_field_put(value_offset(type), value->z);
4081 break;
4082 case T_CHAR:
4083 box->char_field_put(value_offset(type), value->c);
4084 break;
4085 case T_FLOAT:
4086 box->float_field_put(value_offset(type), value->f);
4087 break;
4088 case T_DOUBLE:
4089 box->double_field_put(value_offset(type), value->d);
4090 break;
4091 case T_BYTE:
4092 box->byte_field_put(value_offset(type), value->b);
4093 break;
4094 case T_SHORT:
4095 box->short_field_put(value_offset(type), value->s);
4096 break;
4097 case T_INT:
4098 box->int_field_put(value_offset(type), value->i);
4099 break;
4100 case T_LONG:
4101 box->long_field_put(value_offset(type), value->j);
4102 break;
4103 default:
4104 return nullptr;
4105 }
4106 return box;
4107 }
4108
4109
4110 BasicType java_lang_boxing_object::basic_type(oop box) {
4111 if (box == nullptr) return T_ILLEGAL;
4112 BasicType type = vmClasses::box_klass_type(box->klass());
4113 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
4114 return T_ILLEGAL;
4115 return type;
4116 }
4117
4118
4119 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
4120 BasicType type = vmClasses::box_klass_type(box->klass());
4121 switch (type) {
4122 case T_BOOLEAN:
4123 value->z = box->bool_field(value_offset(type));
4124 break;
4125 case T_CHAR:
4126 value->c = box->char_field(value_offset(type));
4127 break;
4128 case T_FLOAT:
4129 value->f = box->float_field(value_offset(type));
4130 break;
4131 case T_DOUBLE:
4132 value->d = box->double_field(value_offset(type));
4133 break;
4134 case T_BYTE:
4135 value->b = box->byte_field(value_offset(type));
4136 break;
4137 case T_SHORT:
4138 value->s = box->short_field(value_offset(type));
4139 break;
4140 case T_INT:
4141 value->i = box->int_field(value_offset(type));
4142 break;
4143 case T_LONG:
4144 value->j = box->long_field(value_offset(type));
4145 break;
4146 default:
4147 return T_ILLEGAL;
4148 } // end switch
4149 return type;
4150 }
4151
4152
4153 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
4154 BasicType type = vmClasses::box_klass_type(box->klass());
4155 switch (type) {
4156 case T_BOOLEAN:
4157 box->bool_field_put(value_offset(type), value->z);
4158 break;
4159 case T_CHAR:
4160 box->char_field_put(value_offset(type), value->c);
4161 break;
4162 case T_FLOAT:
4163 box->float_field_put(value_offset(type), value->f);
4164 break;
4165 case T_DOUBLE:
4166 box->double_field_put(value_offset(type), value->d);
4167 break;
4168 case T_BYTE:
4169 box->byte_field_put(value_offset(type), value->b);
4170 break;
4171 case T_SHORT:
4172 box->short_field_put(value_offset(type), value->s);
4173 break;
4174 case T_INT:
4175 box->int_field_put(value_offset(type), value->i);
4176 break;
4177 case T_LONG:
4178 box->long_field_put(value_offset(type), value->j);
4179 break;
4180 default:
4181 return T_ILLEGAL;
4182 } // end switch
4183 return type;
4184 }
4185
4186
4187 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
4188 switch (type) {
4189 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
4190 case T_CHAR: st->print("%d", value->c); break;
4191 case T_BYTE: st->print("%d", value->b); break;
4192 case T_SHORT: st->print("%d", value->s); break;
4193 case T_INT: st->print("%d", value->i); break;
4194 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
4195 case T_FLOAT: st->print("%f", value->f); break;
4196 case T_DOUBLE: st->print("%lf", value->d); break;
4197 default: st->print("type %d?", type); break;
4198 }
4199 }
4200
4201
4202 // Support for java_lang_ref_SoftReference
4203 //
4204
4205 int java_lang_ref_SoftReference::_timestamp_offset;
4206 int java_lang_ref_SoftReference::_static_clock_offset;
4207
4208 #define SOFTREFERENCE_FIELDS_DO(macro) \
4209 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
4210 macro(_static_clock_offset, k, "clock", long_signature, true)
4211
4212 void java_lang_ref_SoftReference::compute_offsets() {
4213 InstanceKlass* k = vmClasses::SoftReference_klass();
4214 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4215 }
4216
4217 #if INCLUDE_CDS
4218 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
4219 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4220 }
4221 #endif
4222
4223 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
4224 return ref->long_field(_timestamp_offset);
4225 }
4226
4227 jlong java_lang_ref_SoftReference::clock() {
4228 InstanceKlass* ik = vmClasses::SoftReference_klass();
4229 oop base = ik->static_field_base_raw();
4230 return base->long_field(_static_clock_offset);
4231 }
4232
4233 void java_lang_ref_SoftReference::set_clock(jlong value) {
4234 InstanceKlass* ik = vmClasses::SoftReference_klass();
4235 oop base = ik->static_field_base_raw();
4236 base->long_field_put(_static_clock_offset, value);
4237 }
4238
4239 // Support for java_lang_invoke_DirectMethodHandle
4240
4241 int java_lang_invoke_DirectMethodHandle::_member_offset;
4242
4243 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
4244 oop member_name = nullptr;
4245 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
4246 "a DirectMethodHandle oop is expected");
4247 return dmh->obj_field(_member_offset);
4248 }
4249
4250 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
4251 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
4252
4253 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
4254 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
4255 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4256 }
4257
4258 #if INCLUDE_CDS
4259 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
4260 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4261 }
4262 #endif
4263
4264 // Support for java_lang_invoke_MethodHandle
4265
4266 int java_lang_invoke_MethodHandle::_type_offset;
4267 int java_lang_invoke_MethodHandle::_form_offset;
4268
4269 int java_lang_invoke_MemberName::_clazz_offset;
4270 int java_lang_invoke_MemberName::_name_offset;
4271 int java_lang_invoke_MemberName::_type_offset;
4272 int java_lang_invoke_MemberName::_flags_offset;
4273 int java_lang_invoke_MemberName::_method_offset;
4274 int java_lang_invoke_MemberName::_vmindex_offset;
4275
4276 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
4277 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
4278
4279 int java_lang_invoke_LambdaForm::_vmentry_offset;
4280
4281 #define METHODHANDLE_FIELDS_DO(macro) \
4282 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4283 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
4284
4285 void java_lang_invoke_MethodHandle::compute_offsets() {
4286 InstanceKlass* k = vmClasses::MethodHandle_klass();
4287 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4288 }
4289
4290 #if INCLUDE_CDS
4291 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4292 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4293 }
4294 #endif
4295
4296 #define MEMBERNAME_FIELDS_DO(macro) \
4297 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4298 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4299 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
4300 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
4301 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
4302
4303 void java_lang_invoke_MemberName::compute_offsets() {
4304 InstanceKlass* k = vmClasses::MemberName_klass();
4305 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4306 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4307 }
4308
4309 #if INCLUDE_CDS
4310 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4311 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4312 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4313 }
4314 #endif
4315
4316 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4317 macro(_vmholder_offset, k, "vmholder", class_signature, false)
4318
4319 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4320 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4321 assert(k != nullptr, "jdk mismatch");
4322 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4323 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4324 }
4325
4326 #if INCLUDE_CDS
4327 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4328 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4329 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4330 }
4331 #endif
4332
4333 #define LAMBDAFORM_FIELDS_DO(macro) \
4334 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4335
4336 void java_lang_invoke_LambdaForm::compute_offsets() {
4337 InstanceKlass* k = vmClasses::LambdaForm_klass();
4338 assert (k != nullptr, "jdk mismatch");
4339 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4340 }
4341
4342 #if INCLUDE_CDS
4343 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4344 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4345 }
4346 #endif
4347
4348 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4349 return obj != nullptr && is_subclass(obj->klass());
4350 }
4351
4352 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4353 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4354
4355 #define NEP_FIELDS_DO(macro) \
4356 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
4357 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4358
4359 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4360 return obj != nullptr && is_subclass(obj->klass());
4361 }
4362
4363 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4364 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4365 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4366 }
4367
4368 #if INCLUDE_CDS
4369 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4370 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4371 }
4372 #endif
4373
4374 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4375 return entry->obj_field(_method_type_offset);
4376 }
4377
4378 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4379 return entry->long_field(_downcall_stub_address_offset);
4380 }
4381
4382 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4383 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4384 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4385 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4386 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4387 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4388 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4389
4390 #define ABIDescriptor_FIELDS_DO(macro) \
4391 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4392 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4393 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4394 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4395 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4396 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4397 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4398
4399 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4400 return obj != nullptr && is_subclass(obj->klass());
4401 }
4402
4403 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4404 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4405 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4406 }
4407
4408 #if INCLUDE_CDS
4409 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4410 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4411 }
4412 #endif
4413
4414 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4415 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4416 }
4417
4418 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4419 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4420 }
4421
4422 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4423 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4424 }
4425
4426 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4427 return entry->int_field(_stackAlignment_offset);
4428 }
4429
4430 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4431 return entry->int_field(_shadowSpace_offset);
4432 }
4433
4434 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4435 return entry->obj_field(_scratch1_offset);
4436 }
4437
4438 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4439 return entry->obj_field(_scratch2_offset);
4440 }
4441
4442 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4443 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4444 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4445 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4446
4447 #define VMStorage_FIELDS_DO(macro) \
4448 macro(_type_offset, k, "type", byte_signature, false); \
4449 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4450 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4451 macro(_debugName_offset, k, "debugName", string_signature, false); \
4452
4453 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4454 return obj != nullptr && is_subclass(obj->klass());
4455 }
4456
4457 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4458 InstanceKlass* k = vmClasses::VMStorage_klass();
4459 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4460 }
4461
4462 #if INCLUDE_CDS
4463 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4464 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4465 }
4466 #endif
4467
4468 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4469 return entry->byte_field(_type_offset);
4470 }
4471
4472 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4473 return entry->int_field(_indexOrOffset_offset);
4474 }
4475
4476 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4477 return entry->short_field(_segmentMaskOrSize_offset);
4478 }
4479
4480 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4481 return entry->obj_field(_debugName_offset);
4482 }
4483
4484 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4485 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4486
4487 #define CallConv_FIELDS_DO(macro) \
4488 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4489 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4490
4491 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4492 return obj != nullptr && is_subclass(obj->klass());
4493 }
4494
4495 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4496 InstanceKlass* k = vmClasses::CallConv_klass();
4497 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4498 }
4499
4500 #if INCLUDE_CDS
4501 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4502 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4503 }
4504 #endif
4505
4506 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4507 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4508 }
4509
4510 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4511 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4512 }
4513
4514 oop java_lang_invoke_MethodHandle::type(oop mh) {
4515 return mh->obj_field(_type_offset);
4516 }
4517
4518 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4519 mh->obj_field_put(_type_offset, mtype);
4520 }
4521
4522 oop java_lang_invoke_MethodHandle::form(oop mh) {
4523 assert(_form_offset != 0, "");
4524 return mh->obj_field(_form_offset);
4525 }
4526
4527 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4528 assert(_form_offset != 0, "");
4529 mh->obj_field_put(_form_offset, lform);
4530 }
4531
4532 /// MemberName accessors
4533
4534 oop java_lang_invoke_MemberName::clazz(oop mname) {
4535 assert(is_instance(mname), "wrong type");
4536 return mname->obj_field(_clazz_offset);
4537 }
4538
4539 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4540 assert(is_instance(mname), "wrong type");
4541 mname->obj_field_put(_clazz_offset, clazz);
4542 }
4543
4544 oop java_lang_invoke_MemberName::name(oop mname) {
4545 assert(is_instance(mname), "wrong type");
4546 return mname->obj_field(_name_offset);
4547 }
4548
4549 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4550 assert(is_instance(mname), "wrong type");
4551 mname->obj_field_put(_name_offset, name);
4552 }
4553
4554 oop java_lang_invoke_MemberName::type(oop mname) {
4555 assert(is_instance(mname), "wrong type");
4556 return mname->obj_field(_type_offset);
4557 }
4558
4559 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4560 assert(is_instance(mname), "wrong type");
4561 mname->obj_field_put(_type_offset, type);
4562 }
4563
4564 int java_lang_invoke_MemberName::flags(oop mname) {
4565 assert(is_instance(mname), "wrong type");
4566 return mname->int_field(_flags_offset);
4567 }
4568
4569 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4570 assert(is_instance(mname), "wrong type");
4571 mname->int_field_put(_flags_offset, flags);
4572 }
4573
4574 // Return vmtarget from ResolvedMethodName method field through indirection
4575 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4576 assert(is_instance(mname), "wrong type");
4577 oop method = mname->obj_field(_method_offset);
4578 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4579 }
4580
4581 bool java_lang_invoke_MemberName::is_method(oop mname) {
4582 assert(is_instance(mname), "must be MemberName");
4583 return (flags(mname) & (MN_IS_METHOD | MN_IS_OBJECT_CONSTRUCTOR)) > 0;
4584 }
4585
4586 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4587 assert(is_instance(mname), "wrong type");
4588 mname->obj_field_put(_method_offset, resolved_method);
4589 }
4590
4591 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4592 assert(is_instance(mname), "wrong type");
4593 return (intptr_t) mname->address_field(_vmindex_offset);
4594 }
4595
4596 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4597 assert(is_instance(mname), "wrong type");
4598 mname->address_field_put(_vmindex_offset, (address) index);
4599 }
4600
4601
4602 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4603 assert(is_instance(resolved_method), "wrong type");
4604 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4605 assert(m->is_method(), "must be");
4606 return m;
4607 }
4608
4609 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4610 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4611 assert(is_instance(resolved_method), "wrong type");
4612 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4613 }
4614
4615 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4616 assert(is_instance(resolved_method), "wrong type");
4617 resolved_method->obj_field_put(_vmholder_offset, holder);
4618 }
4619
4620 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4621 const Method* method = m();
4622
4623 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4624 oop resolved_method = ResolvedMethodTable::find_method(method);
4625 if (resolved_method != nullptr) {
4626 return resolved_method;
4627 }
4628
4629 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4630 if (!k->is_initialized()) {
4631 k->initialize(CHECK_NULL);
4632 }
4633
4634 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4635
4636 NoSafepointVerifier nsv;
4637
4638 if (method->is_old()) {
4639 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4640 method->get_new_method();
4641 }
4642
4643 InstanceKlass* holder = method->method_holder();
4644
4645 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4646 // Add a reference to the loader (actually mirror because hidden classes may not have
4647 // distinct loaders) to ensure the metadata is kept alive.
4648 // This mirror may be different than the one in clazz field.
4649 set_vmholder(new_resolved_method, holder->java_mirror());
4650
4651 // Set flag in class to indicate this InstanceKlass has entries in the table
4652 // to avoid walking table during redefinition if none of the redefined classes
4653 // have any membernames in the table.
4654 holder->set_has_resolved_methods();
4655
4656 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4657 }
4658
4659 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4660 assert(is_instance(lform), "wrong type");
4661 return lform->obj_field(_vmentry_offset);
4662 }
4663
4664
4665 // Support for java_lang_invoke_MethodType
4666
4667 int java_lang_invoke_MethodType::_rtype_offset;
4668 int java_lang_invoke_MethodType::_ptypes_offset;
4669
4670 #define METHODTYPE_FIELDS_DO(macro) \
4671 macro(_rtype_offset, k, "rtype", class_signature, false); \
4672 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4673
4674 void java_lang_invoke_MethodType::compute_offsets() {
4675 InstanceKlass* k = vmClasses::MethodType_klass();
4676 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4677 }
4678
4679 #if INCLUDE_CDS
4680 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4681 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4682 }
4683 #endif
4684
4685 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4686 st->print("(");
4687 objArrayOop pts = ptypes(mt);
4688 if (pts != nullptr) {
4689 for (int i = 0, limit = pts->length(); i < limit; i++) {
4690 java_lang_Class::print_signature(pts->obj_at(i), st);
4691 }
4692 } else {
4693 st->print("null");
4694 }
4695 st->print(")");
4696 oop rt = rtype(mt);
4697 if (rt != nullptr) {
4698 java_lang_Class::print_signature(rt, st);
4699 } else {
4700 st->print("null");
4701 }
4702 }
4703
4704 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4705 ResourceMark rm;
4706 stringStream buffer(128);
4707 print_signature(mt, &buffer);
4708 const char* sigstr = buffer.base();
4709 int siglen = (int) buffer.size();
4710 Symbol *name;
4711 if (!intern_if_not_found) {
4712 name = SymbolTable::probe(sigstr, siglen);
4713 } else {
4714 name = SymbolTable::new_symbol(sigstr, siglen);
4715 }
4716 return name;
4717 }
4718
4719 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4720 if (mt1 == mt2)
4721 return true;
4722 if (rtype(mt1) != rtype(mt2))
4723 return false;
4724 if (ptype_count(mt1) != ptype_count(mt2))
4725 return false;
4726 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4727 if (ptype(mt1, i) != ptype(mt2, i))
4728 return false;
4729 }
4730 return true;
4731 }
4732
4733 oop java_lang_invoke_MethodType::rtype(oop mt) {
4734 assert(is_instance(mt), "must be a MethodType");
4735 return mt->obj_field(_rtype_offset);
4736 }
4737
4738 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4739 assert(is_instance(mt), "must be a MethodType");
4740 return (objArrayOop) mt->obj_field(_ptypes_offset);
4741 }
4742
4743 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4744 return ptypes(mt)->obj_at(idx);
4745 }
4746
4747 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4748 return ptypes(mt)->length();
4749 }
4750
4751 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4752 objArrayOop pts = ptypes(mt);
4753 int count = pts->length();
4754 int slots = 0;
4755 for (int i = 0; i < count; i++) {
4756 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4757 slots += type2size[bt];
4758 }
4759 return slots;
4760 }
4761
4762 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4763 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4764 return type2size[bt];
4765 }
4766
4767
4768 // Support for java_lang_invoke_CallSite
4769
4770 int java_lang_invoke_CallSite::_target_offset;
4771 int java_lang_invoke_CallSite::_vmdependencies_offset;
4772 int java_lang_invoke_CallSite::_last_cleanup_offset;
4773
4774 #define CALLSITE_FIELDS_DO(macro) \
4775 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
4776
4777 void java_lang_invoke_CallSite::compute_offsets() {
4778 InstanceKlass* k = vmClasses::CallSite_klass();
4779 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4780 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4781 }
4782
4783 #if INCLUDE_CDS
4784 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4785 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4786 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4787 }
4788 #endif
4789
4790 DependencyContext java_lang_invoke_CallSite::vmdependencies(oop call_site) {
4791 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4792 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4793 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4794 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4795 return dep_ctx;
4796 }
4797
4798 // Support for java_lang_invoke_ConstantCallSite
4799
4800 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4801
4802 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4803 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4804
4805 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4806 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4807 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4808 }
4809
4810 #if INCLUDE_CDS
4811 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4812 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4813 }
4814 #endif
4815
4816 // Support for java_lang_ClassLoader
4817
4818 int java_lang_ClassLoader::_loader_data_offset;
4819 int java_lang_ClassLoader::_parallelCapable_offset;
4820 int java_lang_ClassLoader::_name_offset;
4821 int java_lang_ClassLoader::_nameAndId_offset;
4822 int java_lang_ClassLoader::_unnamedModule_offset;
4823 int java_lang_ClassLoader::_parent_offset;
4824
4825 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4826 assert(loader != nullptr, "loader must not be null");
4827 assert(oopDesc::is_oop(loader), "loader must be oop");
4828 return AtomicAccess::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4829 }
4830
4831 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4832 assert(loader != nullptr, "loader must not be null");
4833 assert(oopDesc::is_oop(loader), "loader must be oop");
4834 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4835 }
4836
4837 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4838 assert(loader != nullptr, "loader must not be null");
4839 assert(oopDesc::is_oop(loader), "loader must be oop");
4840 AtomicAccess::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4841 }
4842
4843 #define CLASSLOADER_FIELDS_DO(macro) \
4844 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4845 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4846 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
4847 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4848 macro(_parent_offset, k1, "parent", classloader_signature, false)
4849
4850 void java_lang_ClassLoader::compute_offsets() {
4851 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4852 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4853
4854 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4855 }
4856
4857 #if INCLUDE_CDS
4858 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4859 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4860 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4861 }
4862 #endif
4863
4864 oop java_lang_ClassLoader::parent(oop loader) {
4865 assert(is_instance(loader), "loader must be oop");
4866 return loader->obj_field(_parent_offset);
4867 }
4868
4869 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4870 assert(is_instance(loader), "loader must be oop");
4871 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4872 }
4873
4874 // Returns the name field of this class loader. If the name field has not
4875 // been set, null will be returned.
4876 oop java_lang_ClassLoader::name(oop loader) {
4877 assert(is_instance(loader), "loader must be oop");
4878 return loader->obj_field(_name_offset);
4879 }
4880
4881 // Returns the nameAndId field of this class loader. The format is
4882 // as follows:
4883 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4884 // If the defining loader has no name then <qualified-class-name> @<id>
4885 // If built-in loader, then omit '@<id>' as there is only one instance.
4886 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4887 oop java_lang_ClassLoader::nameAndId(oop loader) {
4888 assert(is_instance(loader), "loader must be oop");
4889 return loader->obj_field(_nameAndId_offset);
4890 }
4891
4892 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4893 assert(is_instance(loader), "loader must be oop");
4894 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4895 oop acl = loader;
4896 DEBUG_ONLY(jint loop_count = 0);
4897 // This loop taken verbatim from ClassLoader.java:
4898 do {
4899 acl = parent(acl);
4900 if (cl == acl) {
4901 return true;
4902 }
4903 assert(++loop_count > 0, "loop_count overflow");
4904 } while (acl != nullptr);
4905 return false;
4906 }
4907
4908 bool java_lang_ClassLoader::is_instance(oop obj) {
4909 return obj != nullptr && is_subclass(obj->klass());
4910 }
4911
4912
4913 // For class loader classes, parallelCapable defined
4914 // based on non-null field
4915 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4916 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4917 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4918 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4919 }
4920
4921 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4922 oop cl = SystemDictionary::java_system_loader();
4923 while(cl != nullptr) {
4924 if (cl == loader) return true;
4925 cl = parent(cl);
4926 }
4927 return false;
4928 }
4929
4930 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4931 assert(is_instance(loader), "loader must be oop");
4932 return loader->obj_field(_unnamedModule_offset);
4933 }
4934
4935 // Support for java_lang_System
4936 //
4937
4938 int java_lang_System::_static_in_offset;
4939 int java_lang_System::_static_out_offset;
4940 int java_lang_System::_static_err_offset;
4941
4942 #define SYSTEM_FIELDS_DO(macro) \
4943 macro(_static_in_offset, k, "in", input_stream_signature, true); \
4944 macro(_static_out_offset, k, "out", print_stream_signature, true); \
4945 macro(_static_err_offset, k, "err", print_stream_signature, true);
4946
4947 void java_lang_System::compute_offsets() {
4948 InstanceKlass* k = vmClasses::System_klass();
4949 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4950 }
4951
4952 #if INCLUDE_CDS
4953 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4954 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4955 }
4956 #endif
4957
4958 // Support for jdk_internal_misc_UnsafeConstants
4959 //
4960 class UnsafeConstantsFixup : public FieldClosure {
4961 private:
4962 int _address_size;
4963 int _page_size;
4964 bool _big_endian;
4965 bool _use_unaligned_access;
4966 int _data_cache_line_flush_size;
4967 public:
4968 UnsafeConstantsFixup() {
4969 // round up values for all static final fields
4970 _address_size = sizeof(void*);
4971 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4972 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4973 _use_unaligned_access = UseUnalignedAccesses;
4974 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4975 }
4976
4977 void do_field(fieldDescriptor* fd) {
4978 oop mirror = fd->field_holder()->java_mirror();
4979 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4980 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4981 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4982 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4983 if (fd->name() == vmSymbols::address_size_name()) {
4984 mirror->int_field_put(fd->offset(), _address_size);
4985 } else if (fd->name() == vmSymbols::page_size_name()) {
4986 mirror->int_field_put(fd->offset(), _page_size);
4987 } else if (fd->name() == vmSymbols::big_endian_name()) {
4988 mirror->bool_field_put(fd->offset(), _big_endian);
4989 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4990 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4991 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4992 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4993 } else {
4994 assert(false, "unexpected UnsafeConstants field");
4995 }
4996 }
4997 };
4998
4999 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
5000 UnsafeConstantsFixup fixup;
5001 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
5002 }
5003
5004
5005 // java_lang_StackTraceElement
5006
5007 int java_lang_StackTraceElement::_methodName_offset;
5008 int java_lang_StackTraceElement::_fileName_offset;
5009 int java_lang_StackTraceElement::_lineNumber_offset;
5010 int java_lang_StackTraceElement::_moduleName_offset;
5011 int java_lang_StackTraceElement::_moduleVersion_offset;
5012 int java_lang_StackTraceElement::_classLoaderName_offset;
5013 int java_lang_StackTraceElement::_declaringClass_offset;
5014 int java_lang_StackTraceElement::_declaringClassObject_offset;
5015
5016 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
5017 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
5018 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
5019 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
5020 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
5021 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
5022 macro(_methodName_offset, k, "methodName", string_signature, false); \
5023 macro(_fileName_offset, k, "fileName", string_signature, false); \
5024 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
5025
5026 // Support for java_lang_StackTraceElement
5027 void java_lang_StackTraceElement::compute_offsets() {
5028 InstanceKlass* k = vmClasses::StackTraceElement_klass();
5029 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5030 }
5031
5032 #if INCLUDE_CDS
5033 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
5034 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5035 }
5036 #endif
5037
5038 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
5039 element->obj_field_put(_fileName_offset, value);
5040 }
5041
5042 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
5043 element->obj_field_put(_declaringClass_offset, value);
5044 }
5045
5046 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
5047 element->obj_field_put(_methodName_offset, value);
5048 }
5049
5050 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
5051 element->int_field_put(_lineNumber_offset, value);
5052 }
5053
5054 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
5055 element->obj_field_put(_moduleName_offset, value);
5056 }
5057
5058 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
5059 element->obj_field_put(_moduleVersion_offset, value);
5060 }
5061
5062 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
5063 element->obj_field_put(_classLoaderName_offset, value);
5064 }
5065
5066 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
5067 element->obj_field_put(_declaringClassObject_offset, value);
5068 }
5069
5070
5071 // java_lang_AssertionStatusDirectives
5072
5073 int java_lang_AssertionStatusDirectives::_classes_offset;
5074 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
5075 int java_lang_AssertionStatusDirectives::_packages_offset;
5076 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
5077 int java_lang_AssertionStatusDirectives::_deflt_offset;
5078
5079 // Support for java Assertions - java_lang_AssertionStatusDirectives.
5080 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
5081 macro(_classes_offset, k, "classes", string_array_signature, false); \
5082 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
5083 macro(_packages_offset, k, "packages", string_array_signature, false); \
5084 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
5085 macro(_deflt_offset, k, "deflt", bool_signature, false)
5086
5087 void java_lang_AssertionStatusDirectives::compute_offsets() {
5088 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
5089 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5090 }
5091
5092 #if INCLUDE_CDS
5093 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
5094 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5095 }
5096 #endif
5097
5098 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
5099 o->obj_field_put(_classes_offset, val);
5100 }
5101
5102 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
5103 o->obj_field_put(_classEnabled_offset, val);
5104 }
5105
5106 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
5107 o->obj_field_put(_packages_offset, val);
5108 }
5109
5110 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
5111 o->obj_field_put(_packageEnabled_offset, val);
5112 }
5113
5114 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
5115 o->bool_field_put(_deflt_offset, val);
5116 }
5117
5118 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
5119
5120 #define AOS_FIELDS_DO(macro) \
5121 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
5122
5123 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
5124 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
5125 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5126 }
5127
5128 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
5129 assert(_owner_offset != 0, "Must be initialized");
5130 return obj->obj_field(_owner_offset);
5131 }
5132
5133 #if INCLUDE_CDS
5134 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
5135 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5136 }
5137 #endif
5138
5139 int vector_VectorPayload::_payload_offset;
5140
5141 #define VECTORPAYLOAD_FIELDS_DO(macro) \
5142 macro(_payload_offset, k, "payload", object_signature, false)
5143
5144 void vector_VectorPayload::compute_offsets() {
5145 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
5146 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5147 }
5148
5149 #if INCLUDE_CDS
5150 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
5151 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5152 }
5153 #endif
5154
5155 void vector_VectorPayload::set_payload(oop o, oop val) {
5156 o->obj_field_put(_payload_offset, val);
5157 }
5158
5159 bool vector_VectorPayload::is_instance(oop obj) {
5160 return obj != nullptr && is_subclass(obj->klass());
5161 }
5162
5163 int java_lang_Integer_IntegerCache::_static_cache_offset;
5164 int java_lang_Long_LongCache::_static_cache_offset;
5165 int java_lang_Character_CharacterCache::_static_cache_offset;
5166 int java_lang_Short_ShortCache::_static_cache_offset;
5167 int java_lang_Byte_ByteCache::_static_cache_offset;
5168
5169 #define INTEGER_CACHE_FIELDS_DO(macro) \
5170 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5171
5172 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5173 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5174 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5175 }
5176
5177 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5178 oop base = ik->static_field_base_raw();
5179 return objArrayOop(base->obj_field(_static_cache_offset));
5180 }
5181
5182 Symbol* java_lang_Integer_IntegerCache::symbol() {
5183 return vmSymbols::java_lang_Integer_IntegerCache();
5184 }
5185
5186 #if INCLUDE_CDS
5187 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5188 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5189 }
5190 #endif
5191 #undef INTEGER_CACHE_FIELDS_DO
5192
5193 jint java_lang_Integer::value(oop obj) {
5194 jvalue v;
5195 java_lang_boxing_object::get_value(obj, &v);
5196 return v.i;
5197 }
5198
5199 #define LONG_CACHE_FIELDS_DO(macro) \
5200 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5201
5202 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5203 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5204 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5205 }
5206
5207 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5208 oop base = ik->static_field_base_raw();
5209 return objArrayOop(base->obj_field(_static_cache_offset));
5210 }
5211
5212 Symbol* java_lang_Long_LongCache::symbol() {
5213 return vmSymbols::java_lang_Long_LongCache();
5214 }
5215
5216 #if INCLUDE_CDS
5217 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5218 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5219 }
5220 #endif
5221 #undef LONG_CACHE_FIELDS_DO
5222
5223 jlong java_lang_Long::value(oop obj) {
5224 jvalue v;
5225 java_lang_boxing_object::get_value(obj, &v);
5226 return v.j;
5227 }
5228
5229 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5230 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5231
5232 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5233 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5234 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5235 }
5236
5237 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5238 oop base = ik->static_field_base_raw();
5239 return objArrayOop(base->obj_field(_static_cache_offset));
5240 }
5241
5242 Symbol* java_lang_Character_CharacterCache::symbol() {
5243 return vmSymbols::java_lang_Character_CharacterCache();
5244 }
5245
5246 #if INCLUDE_CDS
5247 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5248 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5249 }
5250 #endif
5251 #undef CHARACTER_CACHE_FIELDS_DO
5252
5253 jchar java_lang_Character::value(oop obj) {
5254 jvalue v;
5255 java_lang_boxing_object::get_value(obj, &v);
5256 return v.c;
5257 }
5258
5259 #define SHORT_CACHE_FIELDS_DO(macro) \
5260 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5261
5262 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5263 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5264 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5265 }
5266
5267 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5268 oop base = ik->static_field_base_raw();
5269 return objArrayOop(base->obj_field(_static_cache_offset));
5270 }
5271
5272 Symbol* java_lang_Short_ShortCache::symbol() {
5273 return vmSymbols::java_lang_Short_ShortCache();
5274 }
5275
5276 #if INCLUDE_CDS
5277 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5278 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5279 }
5280 #endif
5281 #undef SHORT_CACHE_FIELDS_DO
5282
5283 jshort java_lang_Short::value(oop obj) {
5284 jvalue v;
5285 java_lang_boxing_object::get_value(obj, &v);
5286 return v.s;
5287 }
5288
5289 #define BYTE_CACHE_FIELDS_DO(macro) \
5290 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5291
5292 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5293 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5294 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5295 }
5296
5297 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5298 oop base = ik->static_field_base_raw();
5299 return objArrayOop(base->obj_field(_static_cache_offset));
5300 }
5301
5302 Symbol* java_lang_Byte_ByteCache::symbol() {
5303 return vmSymbols::java_lang_Byte_ByteCache();
5304 }
5305
5306 #if INCLUDE_CDS
5307 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5308 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5309 }
5310 #endif
5311 #undef BYTE_CACHE_FIELDS_DO
5312
5313 jbyte java_lang_Byte::value(oop obj) {
5314 jvalue v;
5315 java_lang_boxing_object::get_value(obj, &v);
5316 return v.b;
5317 }
5318
5319 int java_lang_Boolean::_static_TRUE_offset;
5320 int java_lang_Boolean::_static_FALSE_offset;
5321
5322 #define BOOLEAN_FIELDS_DO(macro) \
5323 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5324 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5325
5326
5327 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5328 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5329 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5330 }
5331
5332 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5333 oop base = ik->static_field_base_raw();
5334 return base->obj_field(_static_TRUE_offset);
5335 }
5336
5337 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5338 oop base = ik->static_field_base_raw();
5339 return base->obj_field(_static_FALSE_offset);
5340 }
5341
5342 Symbol* java_lang_Boolean::symbol() {
5343 return vmSymbols::java_lang_Boolean();
5344 }
5345
5346 #if INCLUDE_CDS
5347 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5348 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5349 }
5350 #endif
5351 #undef BOOLEAN_CACHE_FIELDS_DO
5352
5353 jboolean java_lang_Boolean::value(oop obj) {
5354 jvalue v;
5355 java_lang_boxing_object::get_value(obj, &v);
5356 return v.z;
5357 }
5358
5359 // java_lang_reflect_RecordComponent
5360
5361 int java_lang_reflect_RecordComponent::_clazz_offset;
5362 int java_lang_reflect_RecordComponent::_name_offset;
5363 int java_lang_reflect_RecordComponent::_type_offset;
5364 int java_lang_reflect_RecordComponent::_accessor_offset;
5365 int java_lang_reflect_RecordComponent::_signature_offset;
5366 int java_lang_reflect_RecordComponent::_annotations_offset;
5367 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5368
5369 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5370 macro(_clazz_offset, k, "clazz", class_signature, false); \
5371 macro(_name_offset, k, "name", string_signature, false); \
5372 macro(_type_offset, k, "type", class_signature, false); \
5373 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5374 macro(_signature_offset, k, "signature", string_signature, false); \
5375 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5376 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5377
5378 // Support for java_lang_reflect_RecordComponent
5379 void java_lang_reflect_RecordComponent::compute_offsets() {
5380 InstanceKlass* k = vmClasses::RecordComponent_klass();
5381 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5382 }
5383
5384 #if INCLUDE_CDS
5385 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5386 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5387 }
5388 #endif
5389
5390 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5391 element->obj_field_put(_clazz_offset, value);
5392 }
5393
5394 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5395 element->obj_field_put(_name_offset, value);
5396 }
5397
5398 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5399 element->obj_field_put(_type_offset, value);
5400 }
5401
5402 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5403 element->obj_field_put(_accessor_offset, value);
5404 }
5405
5406 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5407 element->obj_field_put(_signature_offset, value);
5408 }
5409
5410 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5411 element->obj_field_put(_annotations_offset, value);
5412 }
5413
5414 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5415 element->obj_field_put(_typeAnnotations_offset, value);
5416 }
5417
5418 // java_lang_InternalError
5419 int java_lang_InternalError::_during_unsafe_access_offset;
5420
5421 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5422 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5423 }
5424
5425 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5426 return internal_error->bool_field(_during_unsafe_access_offset);
5427 }
5428
5429 void java_lang_InternalError::compute_offsets() {
5430 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5431 }
5432
5433 #if INCLUDE_CDS
5434 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5435 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5436 }
5437 #endif
5438
5439 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5440 f(java_lang_Class) \
5441 f(java_lang_String) \
5442 f(java_lang_ref_Reference) \
5443 //end
5444
5445 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5446 f(java_lang_System) \
5447 f(java_lang_ClassLoader) \
5448 f(java_lang_Throwable) \
5449 f(java_lang_Thread) \
5450 f(java_lang_Thread_FieldHolder) \
5451 f(java_lang_Thread_Constants) \
5452 f(java_lang_ThreadGroup) \
5453 f(java_lang_VirtualThread) \
5454 f(java_lang_InternalError) \
5455 f(java_lang_AssertionStatusDirectives) \
5456 f(java_lang_ref_SoftReference) \
5457 f(java_lang_invoke_MethodHandle) \
5458 f(java_lang_invoke_DirectMethodHandle) \
5459 f(java_lang_invoke_MemberName) \
5460 f(java_lang_invoke_ResolvedMethodName) \
5461 f(java_lang_invoke_LambdaForm) \
5462 f(java_lang_invoke_MethodType) \
5463 f(java_lang_invoke_CallSite) \
5464 f(java_lang_invoke_ConstantCallSite) \
5465 f(java_lang_reflect_AccessibleObject) \
5466 f(java_lang_reflect_Method) \
5467 f(java_lang_reflect_Constructor) \
5468 f(java_lang_reflect_Field) \
5469 f(java_lang_reflect_RecordComponent) \
5470 f(reflect_ConstantPool) \
5471 f(java_lang_reflect_Parameter) \
5472 f(java_lang_Module) \
5473 f(java_lang_StackTraceElement) \
5474 f(java_lang_ClassFrameInfo) \
5475 f(java_lang_StackFrameInfo) \
5476 f(java_lang_LiveStackFrameInfo) \
5477 f(jdk_internal_vm_ContinuationScope) \
5478 f(jdk_internal_vm_Continuation) \
5479 f(jdk_internal_vm_StackChunk) \
5480 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5481 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5482 f(jdk_internal_foreign_abi_ABIDescriptor) \
5483 f(jdk_internal_foreign_abi_VMStorage) \
5484 f(jdk_internal_foreign_abi_CallConv) \
5485 f(jdk_internal_misc_UnsafeConstants) \
5486 f(java_lang_boxing_object) \
5487 f(vector_VectorPayload) \
5488 //end
5489
5490 #define BASIC_JAVA_CLASSES_DO(f) \
5491 BASIC_JAVA_CLASSES_DO_PART1(f) \
5492 BASIC_JAVA_CLASSES_DO_PART2(f)
5493
5494 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5495
5496 // Compute field offsets of all the classes in this file
5497 void JavaClasses::compute_offsets() {
5498 if (CDSConfig::is_using_archive()) {
5499 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5500 JvmtiExport::has_early_class_hook_env()),
5501 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5502 // None of the classes used by the rest of this function can be replaced by
5503 // JVMTI ClassFileLoadHook.
5504 // We are safe to use the archived offsets, which have already been restored
5505 // by JavaClasses::serialize_offsets, without computing the offsets again.
5506 return;
5507 }
5508
5509 // We have already called the compute_offsets() of the
5510 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5511 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5512 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5513 }
5514
5515 #if INCLUDE_CDS
5516 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5517
5518 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5519 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5520 }
5521 #endif
5522
5523 #if INCLUDE_CDS_JAVA_HEAP
5524 bool JavaClasses::is_supported_for_archiving(oop obj) {
5525 Klass* klass = obj->klass();
5526
5527 if (!CDSConfig::is_dumping_method_handles()) {
5528 // These are supported by CDS only when CDSConfig::is_dumping_method_handles() is enabled.
5529 if (klass == vmClasses::ResolvedMethodName_klass() ||
5530 klass == vmClasses::MemberName_klass()) {
5531 return false;
5532 }
5533 }
5534
5535 if (!AOTReferenceObjSupport::is_enabled() && klass->is_subclass_of(vmClasses::Reference_klass())) {
5536 return false;
5537 }
5538
5539 return true;
5540 }
5541 #endif
5542
5543 #ifndef PRODUCT
5544
5545 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5546
5547 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5548 const char* field_sig) {
5549 EXCEPTION_MARK;
5550 fieldDescriptor fd;
5551 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5552 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5553 InstanceKlass* ik = InstanceKlass::cast(k);
5554 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5555 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5556 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5557 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5558 return false;
5559 }
5560 if (fd.is_static()) {
5561 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5562 return false;
5563 }
5564 if (fd.offset() == deserialized_offset ) {
5565 return true;
5566 } else {
5567 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5568 klass_name, field_name, deserialized_offset, fd.offset());
5569 return false;
5570 }
5571 }
5572
5573 void JavaClasses::check_offsets() {
5574 bool valid = true;
5575
5576 #define CHECK_OFFSET(klass_name, type, field_sig) \
5577 valid &= check_offset(klass_name, java_lang_boxing_object::value_offset(type), "value", field_sig)
5578
5579 CHECK_OFFSET("java/lang/Boolean", T_BOOLEAN, "Z");
5580 CHECK_OFFSET("java/lang/Character", T_CHAR, "C");
5581 CHECK_OFFSET("java/lang/Float", T_FLOAT, "F");
5582 CHECK_OFFSET("java/lang/Double", T_DOUBLE, "D");
5583 CHECK_OFFSET("java/lang/Byte", T_BYTE, "B");
5584 CHECK_OFFSET("java/lang/Short", T_SHORT, "S");
5585 CHECK_OFFSET("java/lang/Integer", T_INT, "I");
5586 CHECK_OFFSET("java/lang/Long", T_LONG, "J");
5587
5588 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5589 }
5590
5591 #endif // PRODUCT
5592
5593 int InjectedField::compute_offset() {
5594 InstanceKlass* ik = klass();
5595 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5596 if (!may_be_java && !fs.field_flags().is_injected()) {
5597 // Only look at injected fields
5598 continue;
5599 }
5600 if (fs.name() == name() && fs.signature() == signature()) {
5601 return fs.offset();
5602 }
5603 }
5604 ResourceMark rm;
5605 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)" : "");
5606 #ifndef PRODUCT
5607 ik->print();
5608 tty->print_cr("all fields:");
5609 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5610 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());
5611 }
5612 #endif //PRODUCT
5613 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5614 return -1;
5615 }
5616
5617 void javaClasses_init() {
5618 JavaClasses::compute_offsets();
5619 JavaClasses::check_offsets();
5620 }