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