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/instanceKlass.inline.hpp"
56 #include "oops/instanceMirrorKlass.hpp"
57 #include "oops/klass.inline.hpp"
58 #include "oops/method.inline.hpp"
59 #include "oops/objArrayKlass.hpp"
60 #include "oops/objArrayOop.inline.hpp"
61 #include "oops/oop.inline.hpp"
62 #include "oops/oopCast.inline.hpp"
63 #include "oops/recordComponent.hpp"
64 #include "oops/symbol.hpp"
65 #include "oops/typeArrayOop.inline.hpp"
66 #include "prims/jvmtiExport.hpp"
67 #include "prims/methodHandles.hpp"
68 #include "prims/resolvedMethodTable.hpp"
69 #include "runtime/continuationEntry.inline.hpp"
70 #include "runtime/continuationJavaClasses.inline.hpp"
71 #include "runtime/fieldDescriptor.inline.hpp"
72 #include "runtime/frame.inline.hpp"
73 #include "runtime/handles.inline.hpp"
74 #include "runtime/handshake.hpp"
75 #include "runtime/init.hpp"
76 #include "runtime/interfaceSupport.inline.hpp"
77 #include "runtime/java.hpp"
78 #include "runtime/javaCalls.hpp"
79 #include "runtime/javaThread.hpp"
80 #include "runtime/jniHandles.inline.hpp"
81 #include "runtime/reflection.hpp"
82 #include "runtime/safepoint.hpp"
83 #include "runtime/safepointVerifiers.hpp"
84 #include "runtime/threadSMR.hpp"
85 #include "runtime/vframe.inline.hpp"
86 #include "runtime/vm_version.hpp"
87 #include "utilities/align.hpp"
88 #include "utilities/globalDefinitions.hpp"
89 #include "utilities/growableArray.hpp"
90 #include "utilities/preserveException.hpp"
91 #include "utilities/utf8.hpp"
92 #if INCLUDE_JVMCI
93 #include "jvmci/jvmciJavaClasses.hpp"
94 #endif
95
96 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
97 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
98
99 InjectedField JavaClasses::_injected_fields[] = {
100 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
101 };
102
103 // Register native methods of Object
104 void java_lang_Object::register_natives(TRAPS) {
105 InstanceKlass* obj = vmClasses::Object_klass();
106 Method::register_native(obj, vmSymbols::hashCode_name(),
107 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
108 Method::register_native(obj, vmSymbols::wait_name(),
109 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
110 Method::register_native(obj, vmSymbols::notify_name(),
111 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
112 Method::register_native(obj, vmSymbols::notifyAll_name(),
113 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
114 Method::register_native(obj, vmSymbols::clone_name(),
115 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
116 }
117
118 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
119 return _injected_fields[(int)id].compute_offset();
120 }
121
122 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
123 *field_count = 0;
124
125 vmSymbolID sid = vmSymbols::find_sid(class_name);
126 if (sid == vmSymbolID::NO_SID) {
127 // Only well known classes can inject fields
128 return nullptr;
129 }
130
131 int count = 0;
132 int start = -1;
133
134 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
135 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \
136 count++; \
137 if (start == -1) { \
138 start = (int)InjectedFieldID::klass##_##name##_enum; \
139 } \
140 }
141 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
142 #undef LOOKUP_INJECTED_FIELD
143
144 if (start != -1) {
145 *field_count = count;
146 return _injected_fields + start;
147 }
148 return nullptr;
149 }
150
151
152 // Helpful routine for computing field offsets at run time rather than hardcoding them
153 // Finds local fields only, including static fields. Static field offsets are from the
154 // beginning of the mirror.
155 void JavaClasses::compute_offset(int &dest_offset,
156 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
157 bool is_static) {
158 fieldDescriptor fd;
159 if (ik == nullptr) {
160 ResourceMark rm;
161 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
162 vm_exit_during_initialization("Invalid layout of well-known class");
163 }
164
165 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
166 ResourceMark rm;
167 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
168 name_symbol->as_C_string(), signature_symbol->as_C_string());
169 #ifndef PRODUCT
170 // Prints all fields and offsets
171 Log(class) lt;
172 LogStream ls(lt.error());
173 ik->print_on(&ls);
174 #endif //PRODUCT
175 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
176 }
177 dest_offset = fd.offset();
178 }
179
180 // Overloading to pass name as a string.
181 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
182 const char* name_string, Symbol* signature_symbol,
183 bool is_static) {
184 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
185 if (name == nullptr) {
186 ResourceMark rm;
187 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
188 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
189 }
190 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
191 }
192
193 // java_lang_String
194
195 int java_lang_String::_value_offset;
196 int java_lang_String::_hash_offset;
197 int java_lang_String::_hashIsZero_offset;
198 int java_lang_String::_coder_offset;
199 int java_lang_String::_flags_offset;
200
201 bool java_lang_String::_initialized;
202
203
204 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
205 uint8_t* addr = flags_addr(java_string);
206 uint8_t value = AtomicAccess::load(addr);
207 while ((value & flag_mask) == 0) {
208 uint8_t old_value = value;
209 value |= flag_mask;
210 value = AtomicAccess::cmpxchg(addr, old_value, value);
211 if (value == old_value) return false; // Flag bit changed from 0 to 1.
212 }
213 return true; // Flag bit is already 1.
214 }
215
216 #define STRING_FIELDS_DO(macro) \
217 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
218 macro(_hash_offset, k, "hash", int_signature, false); \
219 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
220 macro(_coder_offset, k, "coder", byte_signature, false);
221
222 void java_lang_String::compute_offsets() {
223 if (_initialized) {
224 return;
225 }
226
227 InstanceKlass* k = vmClasses::String_klass();
228 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
229 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
230
231 _initialized = true;
232 }
233
234 #if INCLUDE_CDS
235 void java_lang_String::serialize_offsets(SerializeClosure* f) {
236 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
237 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
238 f->do_bool(&_initialized);
239 }
240 #endif
241
242 class CompactStringsFixup : public FieldClosure {
243 private:
244 bool _value;
245
246 public:
247 CompactStringsFixup(bool value) : _value(value) {}
248
249 void do_field(fieldDescriptor* fd) {
250 if (fd->name() == vmSymbols::compact_strings_name()) {
251 oop mirror = fd->field_holder()->java_mirror();
252 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String");
253 assert(mirror != nullptr, "String must have mirror already");
254 mirror->bool_field_put(fd->offset(), _value);
255 }
256 }
257 };
258
259 void java_lang_String::set_compact_strings(bool value) {
260 CompactStringsFixup fix(value);
261 vmClasses::String_klass()->do_local_static_fields(&fix);
262 }
263
264 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
265 assert(_initialized, "Must be initialized");
266 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
267
268 // Create the String object first, so there's a chance that the String
269 // and the char array it points to end up in the same cache line.
270 oop obj;
271 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH);
272
273 // Create the char array. The String object must be handlized here
274 // because GC can happen as a result of the allocation attempt.
275 Handle h_obj(THREAD, obj);
276 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
277 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
278
279 // Point the String at the char array
280 obj = h_obj();
281 set_value(obj, buffer);
282 // No need to zero the offset, allocation zero'ed the entire String object
283 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
284 return h_obj;
285 }
286
287 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
288 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
289 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
290 typeArrayOop buffer = value(h_obj());
291 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
292 if (is_latin1) {
293 for (int index = 0; index < length; index++) {
294 buffer->byte_at_put(index, (jbyte)unicode[index]);
295 }
296 } else {
297 for (int index = 0; index < length; index++) {
298 buffer->char_at_put(index, unicode[index]);
299 }
300 }
301
302 #ifdef ASSERT
303 {
304 ResourceMark rm;
305 size_t utf8_len = static_cast<size_t>(length);
306 char* expected = UNICODE::as_utf8(unicode, utf8_len);
307 char* actual = as_utf8_string(h_obj());
308 if (strcmp(expected, actual) != 0) {
309 fatal("Unicode conversion failure: %s --> %s", expected, actual);
310 }
311 }
312 #endif
313
314 return h_obj;
315 }
316
317 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
318 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
319 return h_obj();
320 }
321
322 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
323 if (utf8_str == nullptr) {
324 return Handle();
325 }
326 bool has_multibyte, is_latin1;
327 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
328 if (!CompactStrings) {
329 has_multibyte = true;
330 is_latin1 = false;
331 }
332
333 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
334 if (length > 0) {
335 if (!has_multibyte) {
336 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
337 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
338 } else if (is_latin1) {
339 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
340 } else {
341 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
342 }
343 }
344
345 #ifdef ASSERT
346 // This check is too strict when the input string is not a valid UTF8.
347 // For example, it may be created with arbitrary content via jni_NewStringUTF.
348 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, strlen(utf8_str), /*version_leq_47*/false)) {
349 ResourceMark rm;
350 const char* expected = utf8_str;
351 char* actual = as_utf8_string(h_obj());
352 if (strcmp(expected, actual) != 0) {
353 fatal("String conversion failure: %s --> %s", expected, actual);
354 }
355 }
356 #endif
357
358 return h_obj;
359 }
360
361 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
362 Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
363 return h_obj();
364 }
365
366 Handle java_lang_String::create_from_symbol(const Symbol* symbol, TRAPS) {
367 const char* utf8_str = (char*)symbol->bytes();
368 int utf8_len = symbol->utf8_length();
369
370 bool has_multibyte, is_latin1;
371 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
372 if (!CompactStrings) {
373 has_multibyte = true;
374 is_latin1 = false;
375 }
376
377 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
378 if (length > 0) {
379 if (!has_multibyte) {
380 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
381 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
382 } else if (is_latin1) {
383 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
384 } else {
385 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
386 }
387 }
388
389 #ifdef ASSERT
390 // This check is too strict on older classfile versions
391 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, utf8_len, /*version_leq_47*/false))
392 {
393 ResourceMark rm;
394 const char* expected = symbol->as_utf8();
395 char* actual = as_utf8_string(h_obj());
396 if (strncmp(expected, actual, utf8_len) != 0) {
397 fatal("Symbol conversion failure: %s --> %s", expected, actual);
398 }
399 }
400 #endif
401
402 return h_obj;
403 }
404
405 // Converts a C string to a Java String based on current encoding
406 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
407 assert(str != nullptr, "bad arguments");
408
409 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
410 static to_java_string_fn_t _to_java_string_fn = nullptr;
411
412 if (_to_java_string_fn == nullptr) {
413 void *lib_handle = os::native_java_library();
414 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
415 if (_to_java_string_fn == nullptr) {
416 fatal("JNU_NewStringPlatform missing");
417 }
418 }
419
420 jstring js = nullptr;
421 {
422 JavaThread* thread = THREAD;
423 HandleMark hm(thread);
424 ThreadToNativeFromVM ttn(thread);
425 js = (_to_java_string_fn)(thread->jni_environment(), str);
426 }
427
428 Handle native_platform_string(THREAD, JNIHandles::resolve(js));
429 JNIHandles::destroy_local(js); // destroy local JNIHandle.
430 return native_platform_string;
431 }
432
433 // Converts a Java String to a native C string that can be used for
434 // native OS calls.
435 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
436 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
437 static to_platform_string_fn_t _to_platform_string_fn = nullptr;
438
439 if (_to_platform_string_fn == nullptr) {
440 void *lib_handle = os::native_java_library();
441 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
442 if (_to_platform_string_fn == nullptr) {
443 fatal("GetStringPlatformChars missing");
444 }
445 }
446
447 char *native_platform_string;
448 jstring js;
449 { JavaThread* thread = THREAD;
450 js = (jstring) JNIHandles::make_local(thread, java_string());
451 HandleMark hm(thread);
452 ThreadToNativeFromVM ttn(thread);
453 JNIEnv *env = thread->jni_environment();
454 bool is_copy;
455 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
456 assert(is_copy == JNI_TRUE, "is_copy value changed");
457 }
458
459 // Uses a store barrier and therefore needs to be in vm state
460 JNIHandles::destroy_local(js);
461
462 return native_platform_string;
463 }
464
465 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
466 ResourceMark rm(THREAD);
467 return create_from_str(java_name->as_klass_external_name(), THREAD);
468 }
469
470 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
471 jchar* result = as_unicode_string_or_null(java_string, length);
472 if (result == nullptr) {
473 THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
474 }
475 return result;
476 }
477
478 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
479 typeArrayOop value = java_lang_String::value(java_string);
480 length = java_lang_String::length(java_string, value);
481 bool is_latin1 = java_lang_String::is_latin1(java_string);
482
483 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
484 if (result != nullptr) {
485 if (!is_latin1) {
486 for (int index = 0; index < length; index++) {
487 result[index] = value->char_at(index);
488 }
489 } else {
490 for (int index = 0; index < length; index++) {
491 result[index] = ((jchar) value->byte_at(index)) & 0xff;
492 }
493 }
494 }
495 return result;
496 }
497
498 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
499 // The hash and hashIsZero fields are subject to a benign data race,
500 // making it crucial to ensure that any observable result of the
501 // calculation in this method stays correct under any possible read of
502 // these fields. Necessary restrictions to allow this to be correct
503 // without explicit memory fences or similar concurrency primitives is
504 // that we can ever only write to one of these two fields for a given
505 // String instance, and that the computation is idempotent and derived
506 // from immutable state
507 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
508 if (java_lang_String::hash_is_set(java_string)) {
509 return java_string->int_field(_hash_offset);
510 }
511
512 typeArrayOop value = java_lang_String::value(java_string);
513 int length = java_lang_String::length(java_string, value);
514 bool is_latin1 = java_lang_String::is_latin1(java_string);
515
516 unsigned int hash = 0;
517 if (length > 0) {
518 if (is_latin1) {
519 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
520 } else {
521 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
522 }
523 }
524
525 if (update) {
526 if (hash != 0) {
527 java_string->int_field_put(_hash_offset, hash);
528 } else {
529 java_string->bool_field_put(_hashIsZero_offset, true);
530 }
531 }
532 return hash;
533 }
534
535 unsigned int java_lang_String::hash_code(oop java_string) {
536 return hash_code_impl(java_string, /*update=*/true);
537 }
538
539 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
540 return hash_code_impl(java_string, /*update=*/false);
541 }
542
543
544 char* java_lang_String::as_quoted_ascii(oop java_string) {
545 typeArrayOop value = java_lang_String::value(java_string);
546 int length = java_lang_String::length(java_string, value);
547 bool is_latin1 = java_lang_String::is_latin1(java_string);
548
549 if (length == 0) return nullptr;
550
551 char* result;
552 size_t result_length;
553 if (!is_latin1) {
554 jchar* base = value->char_at_addr(0);
555 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
556 result = NEW_RESOURCE_ARRAY(char, result_length);
557 UNICODE::as_quoted_ascii(base, length, result, result_length);
558 } else {
559 jbyte* base = value->byte_at_addr(0);
560 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
561 result = NEW_RESOURCE_ARRAY(char, result_length);
562 UNICODE::as_quoted_ascii(base, length, result, result_length);
563 }
564 assert(result_length >= (size_t)length + 1, "must not be shorter");
565 assert(result_length == strlen(result) + 1, "must match");
566 return result;
567 }
568
569 Symbol* java_lang_String::as_symbol(oop java_string) {
570 typeArrayOop value = java_lang_String::value(java_string);
571 int length = java_lang_String::length(java_string, value);
572 bool is_latin1 = java_lang_String::is_latin1(java_string);
573 if (!is_latin1) {
574 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
575 Symbol* sym = SymbolTable::new_symbol(base, length);
576 return sym;
577 } else {
578 ResourceMark rm;
579 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
580 size_t utf8_len = static_cast<size_t>(length);
581 const char* base = UNICODE::as_utf8(position, utf8_len);
582 Symbol* sym = SymbolTable::new_symbol(base, checked_cast<int>(utf8_len));
583 return sym;
584 }
585 }
586
587 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
588 typeArrayOop value = java_lang_String::value(java_string);
589 int length = java_lang_String::length(java_string, value);
590 bool is_latin1 = java_lang_String::is_latin1(java_string);
591 if (!is_latin1) {
592 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
593 return SymbolTable::probe_unicode(base, length);
594 } else {
595 ResourceMark rm;
596 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
597 size_t utf8_len = static_cast<size_t>(length);
598 const char* base = UNICODE::as_utf8(position, utf8_len);
599 return SymbolTable::probe(base, checked_cast<int>(utf8_len));
600 }
601 }
602
603 size_t java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
604 assert(value_equals(value, java_lang_String::value(java_string)),
605 "value must be same as java_lang_String::value(java_string)");
606 int length = java_lang_String::length(java_string, value);
607 if (length == 0) {
608 return 0;
609 }
610 if (!java_lang_String::is_latin1(java_string)) {
611 return UNICODE::utf8_length(value->char_at_addr(0), length);
612 } else {
613 return UNICODE::utf8_length(value->byte_at_addr(0), length);
614 }
615 }
616
617 size_t java_lang_String::utf8_length(oop java_string) {
618 typeArrayOop value = java_lang_String::value(java_string);
619 return utf8_length(java_string, value);
620 }
621
622 int java_lang_String::utf8_length_as_int(oop java_string) {
623 typeArrayOop value = java_lang_String::value(java_string);
624 return utf8_length_as_int(java_string, value);
625 }
626
627 int java_lang_String::utf8_length_as_int(oop java_string, typeArrayOop value) {
628 assert(value_equals(value, java_lang_String::value(java_string)),
629 "value must be same as java_lang_String::value(java_string)");
630 int length = java_lang_String::length(java_string, value);
631 if (length == 0) {
632 return 0;
633 }
634 if (!java_lang_String::is_latin1(java_string)) {
635 return UNICODE::utf8_length_as_int(value->char_at_addr(0), length);
636 } else {
637 return UNICODE::utf8_length_as_int(value->byte_at_addr(0), length);
638 }
639 }
640
641 char* java_lang_String::as_utf8_string(oop java_string) {
642 size_t length;
643 return as_utf8_string(java_string, length);
644 }
645
646 char* java_lang_String::as_utf8_string(oop java_string, size_t& length) {
647 typeArrayOop value = java_lang_String::value(java_string);
648 // `length` is used as the incoming number of characters to
649 // convert, and then set as the number of bytes in the UTF8 sequence.
650 length = java_lang_String::length(java_string, value);
651 bool is_latin1 = java_lang_String::is_latin1(java_string);
652 if (!is_latin1) {
653 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
654 return UNICODE::as_utf8(position, length);
655 } else {
656 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
657 return UNICODE::as_utf8(position, length);
658 }
659 }
660
661 // Uses a provided buffer if it's sufficiently large, otherwise allocates
662 // a resource array to fit
663 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& utf8_len) {
664 typeArrayOop value = java_lang_String::value(java_string);
665 int len = java_lang_String::length(java_string, value);
666 bool is_latin1 = java_lang_String::is_latin1(java_string);
667 if (!is_latin1) {
668 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
669 utf8_len = UNICODE::utf8_length(position, len);
670 if (utf8_len >= buflen) {
671 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
672 }
673 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
674 } else {
675 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
676 utf8_len = UNICODE::utf8_length(position, len);
677 if (utf8_len >= buflen) {
678 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
679 }
680 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
681 }
682 }
683
684 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen) {
685 assert(value_equals(value, java_lang_String::value(java_string)),
686 "value must be same as java_lang_String::value(java_string)");
687 int length = java_lang_String::length(java_string, value);
688 bool is_latin1 = java_lang_String::is_latin1(java_string);
689 if (!is_latin1) {
690 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
691 return UNICODE::as_utf8(position, length, buf, buflen);
692 } else {
693 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
694 return UNICODE::as_utf8(position, length, buf, buflen);
695 }
696 }
697
698 char* java_lang_String::as_utf8_string(oop java_string, char* buf, size_t buflen) {
699 typeArrayOop value = java_lang_String::value(java_string);
700 return as_utf8_string(java_string, value, buf, buflen);
701 }
702
703 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
704 // `length` is used as the incoming number of characters to
705 // convert, and then set as the number of bytes in the UTF8 sequence.
706 size_t length = static_cast<size_t>(len);
707 typeArrayOop value = java_lang_String::value(java_string);
708 bool is_latin1 = java_lang_String::is_latin1(java_string);
709 assert(start + len <= java_lang_String::length(java_string), "just checking");
710 if (!is_latin1) {
711 jchar* position = value->char_at_addr(start);
712 return UNICODE::as_utf8(position, length);
713 } else {
714 jbyte* position = value->byte_at_addr(start);
715 return UNICODE::as_utf8(position, length);
716 }
717 }
718
719 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen) {
720 assert(value_equals(value, java_lang_String::value(java_string)),
721 "value must be same as java_lang_String::value(java_string)");
722 assert(start + len <= java_lang_String::length(java_string), "just checking");
723 bool is_latin1 = java_lang_String::is_latin1(java_string);
724 if (!is_latin1) {
725 jchar* position = value->char_at_addr(start);
726 return UNICODE::as_utf8(position, len, buf, buflen);
727 } else {
728 jbyte* position = value->byte_at_addr(start);
729 return UNICODE::as_utf8(position, len, buf, buflen);
730 }
731 }
732
733 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
734 assert(java_string->klass() == vmClasses::String_klass(),
735 "must be java_string");
736 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
737 int length = java_lang_String::length(java_string, value);
738 if (length != len) {
739 return false;
740 }
741 bool is_latin1 = java_lang_String::is_latin1(java_string);
742 if (!is_latin1) {
743 for (int i = 0; i < len; i++) {
744 if (value->char_at(i) != chars[i]) {
745 return false;
746 }
747 }
748 } else {
749 for (int i = 0; i < len; i++) {
750 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
751 return false;
752 }
753 }
754 }
755 return true;
756 }
757
758 bool java_lang_String::equals(oop java_string, const char* utf8_string, size_t utf8_len) {
759 assert(java_string->klass() == vmClasses::String_klass(),
760 "must be java_string");
761 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
762 int length = java_lang_String::length(java_string, value);
763 int unicode_length = UTF8::unicode_length(utf8_string, utf8_len);
764 if (length != unicode_length) {
765 return false;
766 }
767 bool is_latin1 = java_lang_String::is_latin1(java_string);
768 jchar c;
769 if (!is_latin1) {
770 for (int i = 0; i < unicode_length; i++) {
771 utf8_string = UTF8::next(utf8_string, &c);
772 if (value->char_at(i) != c) {
773 return false;
774 }
775 }
776 } else {
777 for (int i = 0; i < unicode_length; i++) {
778 utf8_string = UTF8::next(utf8_string, &c);
779 if ((((jchar) value->byte_at(i)) & 0xff) != c) {
780 return false;
781 }
782 }
783 }
784 return true;
785 }
786
787 bool java_lang_String::equals(oop str1, oop str2) {
788 assert(str1->klass() == vmClasses::String_klass(),
789 "must be java String");
790 assert(str2->klass() == vmClasses::String_klass(),
791 "must be java String");
792 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
793 bool is_latin1 = java_lang_String::is_latin1(str1);
794 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
795 bool is_latin2 = java_lang_String::is_latin1(str2);
796
797 if (is_latin1 != is_latin2) {
798 // Strings with different coders are never equal.
799 return false;
800 }
801 return value_equals(value1, value2);
802 }
803
804 // Print the given string to the given outputStream, limiting the output to
805 // at most max_length of the string's characters. If the length exceeds the
806 // limit we print an abridged version of the string with the "middle" elided
807 // and replaced by " ... (N characters ommitted) ... ". If max_length is odd
808 // it is treated as max_length-1.
809 void java_lang_String::print(oop java_string, outputStream* st, int max_length) {
810 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
811 // We need at least two characters to print A ... B
812 assert(max_length > 1, "invalid max_length: %d", max_length);
813
814 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
815
816 if (value == nullptr) {
817 // This can happen if, e.g., printing a String
818 // object before its initializer has been called
819 st->print("nullptr");
820 return;
821 }
822
823 int length = java_lang_String::length(java_string, value);
824 bool is_latin1 = java_lang_String::is_latin1(java_string);
825
826 bool abridge = length > max_length;
827
828 st->print("\"");
829 for (int index = 0; index < length; index++) {
830 // If we need to abridge and we've printed half the allowed characters
831 // then jump to the tail of the string.
832 if (abridge && index >= max_length / 2) {
833 st->print(" ... (%d characters ommitted) ... ", length - 2 * (max_length / 2));
834 index = length - (max_length / 2);
835 abridge = false; // only do this once
836 }
837 jchar c = (!is_latin1) ? value->char_at(index) :
838 ((jchar) value->byte_at(index)) & 0xff;
839 if (c < ' ') {
840 st->print("\\x%02X", c); // print control characters e.g. \x0A
841 } else {
842 st->print("%c", c);
843 }
844 }
845 st->print("\"");
846
847 if (length > max_length) {
848 st->print(" (abridged) ");
849 }
850 }
851
852 // java_lang_Class
853
854 int java_lang_Class::_klass_offset;
855 int java_lang_Class::_array_klass_offset;
856 int java_lang_Class::_oop_size_offset;
857 int java_lang_Class::_static_oop_field_count_offset;
858 int java_lang_Class::_class_loader_offset;
859 int java_lang_Class::_module_offset;
860 int java_lang_Class::_protection_domain_offset;
861 int java_lang_Class::_component_mirror_offset;
862 int java_lang_Class::_init_lock_offset;
863 int java_lang_Class::_signers_offset;
864 int java_lang_Class::_name_offset;
865 int java_lang_Class::_source_file_offset;
866 int java_lang_Class::_classData_offset;
867 int java_lang_Class::_classRedefinedCount_offset;
868 int java_lang_Class::_reflectionData_offset;
869 int java_lang_Class::_modifiers_offset;
870 int java_lang_Class::_is_primitive_offset;
871 int java_lang_Class::_raw_access_flags_offset;
872
873 bool java_lang_Class::_offsets_computed = false;
874 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
875 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
876
877 #ifdef ASSERT
878 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
879 assert(fd->has_initial_value(), "caller should have checked this");
880 assert(fd->field_type() == T_OBJECT, "caller should have checked this");
881 assert(fd->signature() == vmSymbols::string_signature(), "just checking");
882 }
883 #endif
884
885 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
886 DEBUG_ONLY(assert_valid_static_string_field(fd);)
887 oop string = fd->string_initial_value(CHECK);
888 mirror()->obj_field_put(fd->offset(), string);
889 }
890
891 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
892 assert(fd->has_initial_value(), "caller should have checked this");
893 BasicType t = fd->field_type();
894 switch (t) {
895 case T_BYTE:
896 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value()));
897 break;
898 case T_BOOLEAN:
899 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value()));
900 break;
901 case T_CHAR:
902 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value()));
903 break;
904 case T_SHORT:
905 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value()));
906 break;
907 case T_INT:
908 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
909 break;
910 case T_FLOAT:
911 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
912 break;
913 case T_DOUBLE:
914 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
915 break;
916 case T_LONG:
917 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
918 break;
919 default:
920 // Illegal ConstantValue attribute in class file should have been
921 // caught during classfile parsing.
922 ShouldNotReachHere();
923 }
924 }
925
926 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
927 assert(mirror.not_null() && fd->is_static(), "just checking");
928 if (fd->has_initial_value()) {
929 if (fd->field_type() != T_OBJECT) {
930 initialize_static_primitive_field(fd, mirror);
931 } else {
932 initialize_static_string_field(fd, mirror, CHECK);
933 }
934 }
935 }
936
937 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
938 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
939
940 // If the offset was read from the shared archive, it was fixed up already
941 if (!k->in_aot_cache()) {
942 if (k->is_instance_klass()) {
943 // During bootstrap, java.lang.Class wasn't loaded so static field
944 // offsets were computed without the size added it. Go back and
945 // update all the static field offsets to included the size.
946
947 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
948 // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
949 // static fields offsets are updated in this array before reencoding everything into
950 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
951
952 int java_fields;
953 int injected_fields;
954 InstanceKlass* ik = InstanceKlass::cast(k);
955 GrowableArray<FieldInfo>* fields =
956 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
957 &java_fields, &injected_fields);
958 for (int i = 0; i < fields->length(); i++) {
959 FieldInfo* fi = fields->adr_at(i);
960 if (fi->access_flags().is_static()) {
961 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
962 }
963 }
964 Array<u1>* old_stream = ik->fieldinfo_stream();
965 assert(fields->length() == (java_fields + injected_fields), "Must be");
966 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
967 ik->set_fieldinfo_stream(new_fis);
968 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
969
970 Array<u1>* old_table = ik->fieldinfo_search_table();
971 Array<u1>* search_table = FieldInfoStream::create_search_table(ik->constants(), new_fis, k->class_loader_data(), CHECK);
972 ik->set_fieldinfo_search_table(search_table);
973 MetadataFactory::free_array<u1>(k->class_loader_data(), old_table);
974
975 DEBUG_ONLY(FieldInfoStream::validate_search_table(ik->constants(), new_fis, search_table));
976 }
977 }
978
979 if (k->in_aot_cache() && k->has_archived_mirror_index()) {
980 if (HeapShared::is_archived_heap_in_use()) {
981 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
982 assert(present, "Missing archived mirror for %s", k->external_name());
983 return;
984 } else {
985 k->clear_java_mirror_handle();
986 k->clear_archived_mirror_index();
987 }
988 }
989 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
990 }
991
992 void java_lang_Class::initialize_mirror_fields(InstanceKlass* ik,
993 Handle mirror,
994 Handle protection_domain,
995 Handle classData,
996 TRAPS) {
997 // Allocate a simple java object for a lock.
998 // This needs to be a java object because during class initialization
999 // it can be held across a java call.
1000 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
1001 set_init_lock(mirror(), r);
1002
1003 // Set protection domain also
1004 set_protection_domain(mirror(), protection_domain());
1005
1006 // Initialize static fields
1007 ik->do_local_static_fields(&initialize_static_field, mirror, CHECK);
1008
1009 // Set classData
1010 set_class_data(mirror(), classData());
1011 }
1012
1013 // Set the java.lang.Module module field in the java_lang_Class mirror
1014 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
1015 if (CDSConfig::is_using_aot_linked_classes()) {
1016 oop archived_module = java_lang_Class::module(mirror());
1017 if (archived_module != nullptr) {
1018 precond(module() == nullptr || module() == archived_module);
1019 precond(AOTMetaspace::in_aot_cache_static_region((void*)k));
1020 return;
1021 }
1022 }
1023
1024 if (module.is_null()) {
1025 // During startup, the module may be null only if java.base has not been defined yet.
1026 // Put the class on the fixup_module_list to patch later when the java.lang.Module
1027 // for java.base is known. But note that since we captured the null module another
1028 // thread may have completed that initialization.
1029
1030 // With AOT-linked classes, java.base should have been defined before the
1031 // VM loads any classes.
1032 precond(!CDSConfig::is_using_aot_linked_classes());
1033
1034 bool javabase_was_defined = false;
1035 {
1036 MutexLocker m1(current, Module_lock);
1037 // Keep list of classes needing java.base module fixup
1038 if (!ModuleEntryTable::javabase_defined()) {
1039 assert(k->java_mirror() != nullptr, "Class's mirror is null");
1040 k->class_loader_data()->inc_keep_alive_ref_count();
1041 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
1042 fixup_module_field_list()->push(k);
1043 } else {
1044 javabase_was_defined = true;
1045 }
1046 }
1047
1048 // If java.base was already defined then patch this particular class with java.base.
1049 if (javabase_was_defined) {
1050 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
1051 assert(javabase_entry != nullptr && javabase_entry->module_oop() != nullptr,
1052 "Setting class module field, " JAVA_BASE_NAME " should be defined");
1053 Handle javabase_handle(current, javabase_entry->module_oop());
1054 set_module(mirror(), javabase_handle());
1055 }
1056 } else {
1057 assert(Universe::is_module_initialized() ||
1058 (ModuleEntryTable::javabase_defined() &&
1059 (module() == ModuleEntryTable::javabase_moduleEntry()->module_oop())),
1060 "Incorrect java.lang.Module specification while creating mirror");
1061 set_module(mirror(), module());
1062 }
1063 }
1064
1065 // Statically allocate fixup lists because they always get created.
1066 void java_lang_Class::allocate_fixup_lists() {
1067 if (!CDSConfig::is_using_aot_linked_classes()) {
1068 // fixup_mirror_list() is not used when we have preloaded classes. See
1069 // Universe::fixup_mirrors().
1070 GrowableArray<Klass*>* mirror_list =
1071 new (mtClass) GrowableArray<Klass*>(40, mtClass);
1072 set_fixup_mirror_list(mirror_list);
1073
1074 // With AOT-linked classes, java.base module is defined before any class
1075 // is loaded, so there's no need for fixup_module_field_list().
1076 GrowableArray<Klass*>* module_list =
1077 new (mtModule) GrowableArray<Klass*>(500, mtModule);
1078 set_fixup_module_field_list(module_list);
1079 }
1080 }
1081
1082 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
1083 Handle& mirror, Handle& comp_mirror, TRAPS) {
1084 // Allocate mirror (java.lang.Class instance)
1085 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
1086 mirror = Handle(THREAD, mirror_oop);
1087
1088 // Setup indirection from mirror->klass
1089 set_klass(mirror(), k);
1090
1091 // Set the modifiers flag.
1092 u2 computed_modifiers = k->compute_modifier_flags();
1093 set_modifiers(mirror(), computed_modifiers);
1094
1095 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
1096 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
1097
1098 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
1099
1100 // It might also have a component mirror. This mirror must already exist.
1101 if (k->is_array_klass()) {
1102 // The Java code for array classes gets the access flags from the element type.
1103 set_raw_access_flags(mirror(), 0);
1104 if (k->is_typeArray_klass()) {
1105 BasicType type = TypeArrayKlass::cast(k)->element_type();
1106 if (is_scratch) {
1107 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
1108 } else {
1109 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
1110 }
1111 } else {
1112 assert(k->is_objArray_klass(), "Must be");
1113 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1114 assert(element_klass != nullptr, "Must have an element klass");
1115 if (is_scratch) {
1116 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1117 } else {
1118 comp_mirror = Handle(THREAD, element_klass->java_mirror());
1119 }
1120 }
1121 assert(comp_mirror() != nullptr, "must have a mirror");
1122
1123 // Two-way link between the array klass and its component mirror:
1124 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1125 set_component_mirror(mirror(), comp_mirror());
1126 // See below for ordering dependencies between field array_klass in component mirror
1127 // and java_mirror in this klass.
1128 } else {
1129 assert(k->is_instance_klass(), "Must be");
1130 // Set the raw access_flags, this is used by reflection instead of modifier flags.
1131 set_raw_access_flags(mirror(), InstanceKlass::cast(k)->access_flags().as_unsigned_short());
1132 initialize_mirror_fields(InstanceKlass::cast(k), mirror, protection_domain, classData, THREAD);
1133 if (HAS_PENDING_EXCEPTION) {
1134 // If any of the fields throws an exception like OOM remove the klass field
1135 // from the mirror so GC doesn't follow it after the klass has been deallocated.
1136 // This mirror looks like a primitive type, which logically it is because it
1137 // it represents no class.
1138 set_klass(mirror(), nullptr);
1139 return;
1140 }
1141 }
1142 }
1143
1144 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1145 Handle module, Handle protection_domain,
1146 Handle classData, TRAPS) {
1147 assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1148 assert(k->java_mirror() == nullptr, "should only assign mirror once");
1149
1150 // Class_klass has to be loaded because it is used to allocate
1151 // the mirror.
1152 if (vmClasses::Class_klass_is_loaded()) {
1153 Handle mirror;
1154 Handle comp_mirror;
1155
1156 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1157
1158 // set the classLoader field in the java_lang_Class instance
1159 assert(class_loader() == k->class_loader(), "should be same");
1160 set_class_loader(mirror(), class_loader());
1161
1162 // Setup indirection from klass->mirror
1163 // after any exceptions can happen during allocations.
1164 k->set_java_mirror(mirror);
1165
1166 // Set the module field in the java_lang_Class instance. This must be done
1167 // after the mirror is set.
1168 set_mirror_module_field(THREAD, k, mirror, module);
1169
1170 if (comp_mirror() != nullptr) {
1171 // Set after k->java_mirror() is published, because compiled code running
1172 // concurrently doesn't expect a k to have a null java_mirror.
1173 release_set_array_klass(comp_mirror(), k);
1174 }
1175 if (CDSConfig::is_dumping_heap()) {
1176 create_scratch_mirror(k, CHECK);
1177 }
1178 } else {
1179 assert(!CDSConfig::is_using_aot_linked_classes(), "should not come here");
1180 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1181 fixup_mirror_list()->push(k);
1182 }
1183 }
1184
1185 #if INCLUDE_CDS_JAVA_HEAP
1186 // The "scratch mirror" stores the states of the mirror object that can be
1187 // decided at dump time (such as the initial values of the static fields, the
1188 // component mirror, etc). At runtime, more information is added to it by
1189 // java_lang_Class::restore_archived_mirror().
1190 //
1191 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1192 // produces the same result as /*runtime*/create_mirror().
1193 //
1194 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1195 // latter may contain dumptime-specific information that cannot be archived
1196 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1197 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1198 if (k->class_loader() != nullptr &&
1199 k->class_loader() != SystemDictionary::java_platform_loader() &&
1200 k->class_loader() != SystemDictionary::java_system_loader()) {
1201 // We only archive the mirrors of classes loaded by the built-in loaders
1202 return;
1203 }
1204
1205 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1206 Handle mirror;
1207 Handle comp_mirror;
1208 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1209
1210 if (comp_mirror() != nullptr) {
1211 release_set_array_klass(comp_mirror(), k);
1212 }
1213
1214 HeapShared::set_scratch_java_mirror(k, mirror());
1215 }
1216
1217 // Returns true if the mirror is updated, false if no archived mirror
1218 // data is present. After the archived mirror object is restored, the
1219 // shared klass' _has_raw_archived_mirror flag is cleared.
1220 bool java_lang_Class::restore_archived_mirror(Klass *k,
1221 Handle class_loader, Handle module,
1222 Handle protection_domain, TRAPS) {
1223 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1224 // see more details in vmClasses::resolve_all().
1225 if (!vmClasses::Class_klass_is_loaded() && !CDSConfig::is_using_aot_linked_classes()) {
1226 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1227 fixup_mirror_list()->push(k);
1228 return true;
1229 }
1230
1231 oop m = k->archived_java_mirror();
1232 assert(m != nullptr, "must have stored non-null archived mirror");
1233
1234 // Sanity: clear it now to prevent re-initialization if any of the following fails
1235 k->clear_archived_mirror_index();
1236
1237 // mirror is archived, restore
1238 log_debug(aot, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1239 assert(as_Klass(m) == k, "must be");
1240 Handle mirror(THREAD, m);
1241
1242 if (!k->is_array_klass()) {
1243 // - local static final fields with initial values were initialized at dump time
1244 assert(init_lock(mirror()) != nullptr, "allocated during AOT assembly");
1245
1246 if (protection_domain.not_null()) {
1247 set_protection_domain(mirror(), protection_domain());
1248 }
1249 }
1250
1251 assert(class_loader() == k->class_loader(), "should be same");
1252 if (class_loader.not_null()) {
1253 set_class_loader(mirror(), class_loader());
1254 }
1255
1256 k->set_java_mirror(mirror);
1257
1258 set_mirror_module_field(THREAD, k, mirror, module);
1259
1260 if (log_is_enabled(Trace, aot, heap, mirror)) {
1261 ResourceMark rm(THREAD);
1262 log_trace(aot, heap, mirror)(
1263 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1264 }
1265
1266 if (CDSConfig::is_dumping_heap()) {
1267 create_scratch_mirror(k, CHECK_(false));
1268 }
1269
1270 return true;
1271 }
1272 #endif // INCLUDE_CDS_JAVA_HEAP
1273
1274 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1275 assert(_module_offset != 0, "must have been computed already");
1276 set_module(k->java_mirror(), module());
1277 }
1278
1279 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1280 assert(_oop_size_offset != 0, "must be set");
1281 assert(size > 0, "Oop size must be greater than zero, not %zu", size);
1282 assert(size <= INT_MAX, "Lossy conversion: %zu", size);
1283 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1284 }
1285
1286 int java_lang_Class::static_oop_field_count(oop java_class) {
1287 assert(_static_oop_field_count_offset != 0, "must be set");
1288 return java_class->int_field(_static_oop_field_count_offset);
1289 }
1290
1291 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1292 assert(_static_oop_field_count_offset != 0, "must be set");
1293 java_class->int_field_put(_static_oop_field_count_offset, size);
1294 }
1295
1296 oop java_lang_Class::protection_domain(oop java_class) {
1297 assert(_protection_domain_offset != 0, "must be set");
1298 return java_class->obj_field(_protection_domain_offset);
1299 }
1300 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1301 assert(_protection_domain_offset != 0, "must be set");
1302 java_class->obj_field_put(_protection_domain_offset, pd);
1303 }
1304
1305 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1306 assert(_component_mirror_offset != 0, "must be set");
1307 assert(java_lang_Class::as_Klass(java_class) != nullptr &&
1308 java_lang_Class::as_Klass(java_class)->is_array_klass(), "must be");
1309 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1310 }
1311
1312 oop java_lang_Class::component_mirror(oop java_class) {
1313 assert(_component_mirror_offset != 0, "must be set");
1314 return java_class->obj_field(_component_mirror_offset);
1315 }
1316
1317 oop java_lang_Class::init_lock(oop java_class) {
1318 assert(_init_lock_offset != 0, "must be set");
1319 return java_class->obj_field(_init_lock_offset);
1320 }
1321 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1322 assert(_init_lock_offset != 0, "must be set");
1323 java_class->obj_field_put(_init_lock_offset, init_lock);
1324 }
1325
1326 objArrayOop java_lang_Class::signers(oop java_class) {
1327 assert(_signers_offset != 0, "must be set");
1328 return (objArrayOop)java_class->obj_field(_signers_offset);
1329 }
1330
1331 oop java_lang_Class::class_data(oop java_class) {
1332 assert(_classData_offset != 0, "must be set");
1333 return java_class->obj_field(_classData_offset);
1334 }
1335 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1336 assert(_classData_offset != 0, "must be set");
1337 java_class->obj_field_put(_classData_offset, class_data);
1338 }
1339
1340 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1341 assert(_class_loader_offset != 0, "offsets should have been initialized");
1342 java_class->obj_field_put(_class_loader_offset, loader);
1343 }
1344
1345 oop java_lang_Class::class_loader(oop java_class) {
1346 assert(_class_loader_offset != 0, "must be set");
1347 return java_class->obj_field(_class_loader_offset);
1348 }
1349
1350 oop java_lang_Class::module(oop java_class) {
1351 assert(_module_offset != 0, "must be set");
1352 return java_class->obj_field(_module_offset);
1353 }
1354
1355 void java_lang_Class::set_module(oop java_class, oop module) {
1356 assert(_module_offset != 0, "must be set");
1357 java_class->obj_field_put(_module_offset, module);
1358 }
1359
1360 oop java_lang_Class::name(Handle java_class, TRAPS) {
1361 assert(_name_offset != 0, "must be set");
1362 oop o = java_class->obj_field(_name_offset);
1363 if (o == nullptr) {
1364 o = StringTable::intern(as_external_name(java_class()), THREAD);
1365 java_class->obj_field_put(_name_offset, o);
1366 }
1367 return o;
1368 }
1369
1370 oop java_lang_Class::source_file(oop java_class) {
1371 assert(_source_file_offset != 0, "must be set");
1372 return java_class->obj_field(_source_file_offset);
1373 }
1374
1375 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1376 assert(_source_file_offset != 0, "must be set");
1377 java_class->obj_field_put(_source_file_offset, source_file);
1378 }
1379
1380 void java_lang_Class::set_is_primitive(oop java_class) {
1381 assert(_is_primitive_offset != 0, "must be set");
1382 java_class->bool_field_put(_is_primitive_offset, true);
1383 }
1384
1385
1386 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1387 // Mirrors for basic types have a null klass field, which makes them special.
1388 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1389 if (type != T_VOID) {
1390 Klass* aklass = Universe::typeArrayKlass(type);
1391 assert(aklass != nullptr, "correct bootstrap");
1392 release_set_array_klass(java_class, aklass);
1393 }
1394 #ifdef ASSERT
1395 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1396 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1397 #endif
1398 set_modifiers(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
1399 set_raw_access_flags(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
1400
1401 set_is_primitive(java_class);
1402 return java_class;
1403 }
1404
1405 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1406 assert(is_instance(java_class), "must be a Class object");
1407 java_class->metadata_field_put(_klass_offset, klass);
1408 }
1409
1410
1411 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1412 assert(is_instance(java_class), "must be a Class object");
1413 Symbol* name = nullptr;
1414 bool is_instance = false;
1415 if (is_primitive(java_class)) {
1416 name = vmSymbols::type_signature(primitive_type(java_class));
1417 } else {
1418 Klass* k = as_Klass(java_class);
1419 is_instance = k->is_instance_klass();
1420 name = k->name();
1421 }
1422 if (name == nullptr) {
1423 st->print("<null>");
1424 return;
1425 }
1426 if (is_instance) st->print("L");
1427 st->write((char*) name->base(), (int) name->utf8_length());
1428 if (is_instance) st->print(";");
1429 }
1430
1431 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1432 assert(is_instance(java_class), "must be a Class object");
1433 Symbol* name;
1434 if (is_primitive(java_class)) {
1435 name = vmSymbols::type_signature(primitive_type(java_class));
1436 // Because this can create a new symbol, the caller has to decrement
1437 // the refcount, so make adjustment here and below for symbols returned
1438 // that are not created or incremented due to a successful lookup.
1439 name->increment_refcount();
1440 } else {
1441 Klass* k = as_Klass(java_class);
1442 if (!k->is_instance_klass()) {
1443 name = k->name();
1444 name->increment_refcount();
1445 } else {
1446 ResourceMark rm;
1447 const char* sigstr = k->signature_name();
1448 int siglen = (int) strlen(sigstr);
1449 if (!intern_if_not_found) {
1450 name = SymbolTable::probe(sigstr, siglen);
1451 } else {
1452 name = SymbolTable::new_symbol(sigstr, siglen);
1453 }
1454 }
1455 }
1456 return name;
1457 }
1458
1459 // Returns the Java name for this Java mirror (Resource allocated)
1460 // See Klass::external_name().
1461 // For primitive type Java mirrors, its type name is returned.
1462 const char* java_lang_Class::as_external_name(oop java_class) {
1463 assert(is_instance(java_class), "must be a Class object");
1464 const char* name = nullptr;
1465 if (is_primitive(java_class)) {
1466 name = type2name(primitive_type(java_class));
1467 } else {
1468 name = as_Klass(java_class)->external_name();
1469 }
1470 if (name == nullptr) {
1471 name = "<null>";
1472 }
1473 return name;
1474 }
1475
1476 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1477 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1478 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass");
1479 return k;
1480 }
1481
1482 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1483 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1484 java_class->release_metadata_field_put(_array_klass_offset, klass);
1485 }
1486
1487
1488 BasicType java_lang_Class::primitive_type(oop java_class) {
1489 assert(is_primitive(java_class), "just checking");
1490 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1491 BasicType type = T_VOID;
1492 if (ak != nullptr) {
1493 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1494 type = ArrayKlass::cast(ak)->element_type();
1495 } else {
1496 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1497 }
1498 #ifdef ASSERT
1499 if (CDSConfig::is_dumping_heap()) {
1500 oop mirror = Universe::java_mirror(type);
1501 oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1502 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1503 } else {
1504 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1505 }
1506 #endif
1507 return type;
1508 }
1509
1510 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1511 assert(is_instance(java_class), "must be a Class object");
1512 if (is_primitive(java_class)) {
1513 if (reference_klass != nullptr)
1514 (*reference_klass) = nullptr;
1515 return primitive_type(java_class);
1516 } else {
1517 if (reference_klass != nullptr)
1518 (*reference_klass) = as_Klass(java_class);
1519 return T_OBJECT;
1520 }
1521 }
1522
1523
1524 oop java_lang_Class::primitive_mirror(BasicType t) {
1525 oop mirror = Universe::java_mirror(t);
1526 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1527 assert(is_primitive(mirror), "must be primitive");
1528 return mirror;
1529 }
1530
1531 #define CLASS_FIELDS_DO(macro) \
1532 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1533 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1534 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1535 macro(_module_offset, k, "module", module_signature, false); \
1536 macro(_name_offset, k, "name", string_signature, false); \
1537 macro(_classData_offset, k, "classData", object_signature, false); \
1538 macro(_reflectionData_offset, k, "reflectionData", java_lang_ref_SoftReference_signature, false); \
1539 macro(_signers_offset, k, "signers", object_array_signature, false); \
1540 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), char_signature, false); \
1541 macro(_raw_access_flags_offset, k, "classFileAccessFlags", char_signature, false); \
1542 macro(_protection_domain_offset, k, "protectionDomain", java_security_ProtectionDomain_signature, false); \
1543 macro(_is_primitive_offset, k, "primitive", bool_signature, false);
1544
1545 void java_lang_Class::compute_offsets() {
1546 if (_offsets_computed) {
1547 return;
1548 }
1549
1550 _offsets_computed = true;
1551
1552 InstanceKlass* k = vmClasses::Class_klass();
1553 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1554 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1555 }
1556
1557 #if INCLUDE_CDS
1558 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1559 f->do_bool(&_offsets_computed);
1560
1561 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1562
1563 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1564 }
1565 #endif
1566
1567 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1568 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1569 return the_class_mirror->int_field(_classRedefinedCount_offset);
1570 }
1571
1572 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1573 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1574 the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1575 }
1576
1577 int java_lang_Class::modifiers(oop the_class_mirror) {
1578 assert(_modifiers_offset != 0, "offsets should have been initialized");
1579 return the_class_mirror->char_field(_modifiers_offset);
1580 }
1581
1582 void java_lang_Class::set_modifiers(oop the_class_mirror, u2 value) {
1583 assert(_modifiers_offset != 0, "offsets should have been initialized");
1584 the_class_mirror->char_field_put(_modifiers_offset, value);
1585 }
1586
1587 void java_lang_Class::set_raw_access_flags(oop the_class_mirror, u2 value) {
1588 assert(_raw_access_flags_offset != 0, "offsets should have been initialized");
1589 the_class_mirror->char_field_put(_raw_access_flags_offset, value);
1590 }
1591
1592
1593 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1594 // platform thread structure, and a eetop offset which was used for thread
1595 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1596 // merged, so in the HotSpot VM we just use the eetop field for the thread
1597 // instead of the privateInfo_offset.
1598 //
1599 // Note: The stackSize field is only present starting in 1.4.
1600
1601 int java_lang_Thread_FieldHolder::_group_offset;
1602 int java_lang_Thread_FieldHolder::_priority_offset;
1603 int java_lang_Thread_FieldHolder::_stackSize_offset;
1604 int java_lang_Thread_FieldHolder::_daemon_offset;
1605 int java_lang_Thread_FieldHolder::_thread_status_offset;
1606
1607 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1608 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1609 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1610 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1611 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1612 macro(_thread_status_offset, k, "threadStatus", int_signature, false)
1613
1614 void java_lang_Thread_FieldHolder::compute_offsets() {
1615 assert(_group_offset == 0, "offsets should be initialized only once");
1616
1617 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1618 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1619 }
1620
1621 #if INCLUDE_CDS
1622 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1623 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1624 }
1625 #endif
1626
1627 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1628 return holder->obj_field(_group_offset);
1629 }
1630
1631 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1632 return (ThreadPriority)holder->int_field(_priority_offset);
1633 }
1634
1635 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1636 holder->int_field_put(_priority_offset, priority);
1637 }
1638
1639 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1640 return holder->long_field(_stackSize_offset);
1641 }
1642
1643 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1644 return holder->bool_field(_daemon_offset) != 0;
1645 }
1646
1647 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1648 assert(val, "daemon status is never turned off");
1649 holder->bool_field_put(_daemon_offset, val);
1650 }
1651
1652 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1653 holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1654 }
1655
1656 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1657 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1658 }
1659
1660
1661 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1662
1663 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1664 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true);
1665
1666 void java_lang_Thread_Constants::compute_offsets() {
1667 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1668
1669 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1670 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1671 }
1672
1673 #if INCLUDE_CDS
1674 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1675 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1676 }
1677 #endif
1678
1679 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1680 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1681 oop base = k->static_field_base_raw();
1682 return base->obj_field(_static_VTHREAD_GROUP_offset);
1683 }
1684
1685
1686 int java_lang_Thread::_holder_offset;
1687 int java_lang_Thread::_name_offset;
1688 int java_lang_Thread::_contextClassLoader_offset;
1689 int java_lang_Thread::_eetop_offset;
1690 int java_lang_Thread::_jvmti_thread_state_offset;
1691 int java_lang_Thread::_vthread_transition_disable_count_offset;
1692 int java_lang_Thread::_is_in_vthread_transition_offset;
1693 int java_lang_Thread::_interrupted_offset;
1694 int java_lang_Thread::_interruptLock_offset;
1695 int java_lang_Thread::_tid_offset;
1696 int java_lang_Thread::_continuation_offset;
1697 int java_lang_Thread::_park_blocker_offset;
1698 int java_lang_Thread::_scopedValueBindings_offset;
1699 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1700
1701 #define THREAD_FIELDS_DO(macro) \
1702 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \
1703 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1704 macro(_contextClassLoader_offset, k, "contextClassLoader", classloader_signature, false); \
1705 macro(_eetop_offset, k, "eetop", long_signature, false); \
1706 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1707 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \
1708 macro(_tid_offset, k, "tid", long_signature, false); \
1709 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1710 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1711 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1712
1713 void java_lang_Thread::compute_offsets() {
1714 assert(_holder_offset == 0, "offsets should be initialized only once");
1715
1716 InstanceKlass* k = vmClasses::Thread_klass();
1717 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1718 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1719 }
1720
1721 #if INCLUDE_CDS
1722 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1723 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1724 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1725 }
1726 #endif
1727
1728 JavaThread* java_lang_Thread::thread(oop java_thread) {
1729 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1730 }
1731
1732 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1733 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1734 }
1735
1736 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1737 java_thread->address_field_put(_eetop_offset, (address)thread);
1738 }
1739
1740 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1741 java_thread->release_address_field_put(_eetop_offset, (address)thread);
1742 }
1743
1744 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1745 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1746 }
1747
1748 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1749 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1750 }
1751
1752 int java_lang_Thread::vthread_transition_disable_count(oop java_thread) {
1753 jint* addr = java_thread->field_addr<jint>(_vthread_transition_disable_count_offset);
1754 return AtomicAccess::load(addr);
1755 }
1756
1757 void java_lang_Thread::inc_vthread_transition_disable_count(oop java_thread) {
1758 assert(VThreadTransition_lock->owned_by_self(), "Must be locked");
1759 jint* addr = java_thread->field_addr<jint>(_vthread_transition_disable_count_offset);
1760 int val = AtomicAccess::load(addr);
1761 AtomicAccess::store(addr, val + 1);
1762 }
1763
1764 void java_lang_Thread::dec_vthread_transition_disable_count(oop java_thread) {
1765 assert(VThreadTransition_lock->owned_by_self(), "Must be locked");
1766 jint* addr = java_thread->field_addr<jint>(_vthread_transition_disable_count_offset);
1767 int val = AtomicAccess::load(addr);
1768 AtomicAccess::store(addr, val - 1);
1769 }
1770
1771 bool java_lang_Thread::is_in_vthread_transition(oop java_thread) {
1772 jboolean* addr = java_thread->field_addr<jboolean>(_is_in_vthread_transition_offset);
1773 return AtomicAccess::load(addr);
1774 }
1775
1776 void java_lang_Thread::set_is_in_vthread_transition(oop java_thread, bool val) {
1777 assert(is_in_vthread_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside");
1778 jboolean* addr = java_thread->field_addr<jboolean>(_is_in_vthread_transition_offset);
1779 AtomicAccess::store(addr, (jboolean)val);
1780 }
1781
1782 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1783 assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1784 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1785 }
1786
1787 oop java_lang_Thread::holder(oop java_thread) {
1788 // Note: may return null if the thread is still attaching
1789 return java_thread->obj_field(_holder_offset);
1790 }
1791 oop java_lang_Thread::interrupt_lock(oop java_thread) {
1792 return java_thread->obj_field(_interruptLock_offset);
1793 }
1794
1795 bool java_lang_Thread::interrupted(oop java_thread) {
1796 // Make sure the caller can safely access oops.
1797 assert(Thread::current()->is_VM_thread() ||
1798 (JavaThread::current()->thread_state() != _thread_blocked &&
1799 JavaThread::current()->thread_state() != _thread_in_native),
1800 "Unsafe access to oop");
1801 return java_thread->bool_field_volatile(_interrupted_offset);
1802 }
1803
1804 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1805 // Make sure the caller can safely access oops.
1806 assert(Thread::current()->is_VM_thread() ||
1807 (JavaThread::current()->thread_state() != _thread_blocked &&
1808 JavaThread::current()->thread_state() != _thread_in_native),
1809 "Unsafe access to oop");
1810 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1811 }
1812
1813
1814 oop java_lang_Thread::name(oop java_thread) {
1815 return java_thread->obj_field(_name_offset);
1816 }
1817
1818
1819 void java_lang_Thread::set_name(oop java_thread, oop name) {
1820 java_thread->obj_field_put(_name_offset, name);
1821 }
1822
1823 // Convenience macros for setting and getting Thread fields that
1824 // are actually stored in the FieldHolder object of the thread.
1825 // The FieldHolder can be null whilst a thread is attaching via
1826 // JNI, and when the main thread is attaching.
1827
1828 // The default value should be the default/zero initialized value
1829 // of the field as it would be in java.lang.Thread.FieldHolder.
1830 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \
1831 { \
1832 oop holder = java_lang_Thread::holder(java_thread); \
1833 if (holder != nullptr) \
1834 return java_lang_Thread_FieldHolder::field(holder); \
1835 else \
1836 return default_val; \
1837 }
1838
1839 // We should never be trying to set a field of an attaching thread.
1840 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \
1841 { \
1842 oop holder = java_lang_Thread::holder(java_thread); \
1843 assert(holder != nullptr, "Thread not fully initialized"); \
1844 java_lang_Thread_FieldHolder::set_##field(holder, value); \
1845 }
1846
1847
1848 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1849 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1850 }
1851
1852
1853 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1854 SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1855 }
1856
1857
1858 oop java_lang_Thread::threadGroup(oop java_thread) {
1859 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1860 }
1861
1862
1863 bool java_lang_Thread::is_alive(oop java_thread) {
1864 JavaThread* thr = java_lang_Thread::thread(java_thread);
1865 return (thr != nullptr);
1866 }
1867
1868
1869 bool java_lang_Thread::is_daemon(oop java_thread) {
1870 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1871 }
1872
1873
1874 void java_lang_Thread::set_daemon(oop java_thread) {
1875 SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1876 }
1877
1878 oop java_lang_Thread::context_class_loader(oop java_thread) {
1879 return java_thread->obj_field(_contextClassLoader_offset);
1880 }
1881
1882
1883 jlong java_lang_Thread::stackSize(oop java_thread) {
1884 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1885 }
1886
1887 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1888 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1889 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1890 }
1891
1892 // Read thread status value from threadStatus field in java.lang.Thread java class.
1893 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1894 // Make sure the caller is operating on behalf of the VM or is
1895 // running VM code (state == _thread_in_vm).
1896 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1897 JavaThread::current()->thread_state() == _thread_in_vm ||
1898 JavaThread::current() == java_lang_Thread::thread(java_thread),
1899 "unsafe call to java_lang_Thread::get_thread_status()?");
1900 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1901 }
1902
1903 ByteSize java_lang_Thread::thread_id_offset() {
1904 return in_ByteSize(_tid_offset);
1905 }
1906
1907 oop java_lang_Thread::park_blocker(oop java_thread) {
1908 return java_thread->obj_field_access<MO_RELAXED>(_park_blocker_offset);
1909 }
1910
1911 // Obtain stack trace for platform or mounted virtual thread.
1912 // If jthread is a virtual thread and it has been unmounted (or remounted to different carrier) the method returns null.
1913 // The caller (java.lang.VirtualThread) handles returned nulls via retry.
1914 oop java_lang_Thread::async_get_stack_trace(jobject jthread, TRAPS) {
1915 ThreadsListHandle tlh(THREAD);
1916 JavaThread* java_thread = nullptr;
1917 oop thread_oop;
1918
1919 bool has_java_thread = tlh.cv_internal_thread_to_JavaThread(jthread, &java_thread, &thread_oop);
1920 if (!has_java_thread) {
1921 return nullptr;
1922 }
1923
1924 class GetStackTraceHandshakeClosure : public HandshakeClosure {
1925 public:
1926 const Handle _thread_h;
1927 int _depth;
1928 bool _retry_handshake;
1929 GrowableArray<Method*>* _methods;
1930 GrowableArray<int>* _bcis;
1931
1932 GetStackTraceHandshakeClosure(Handle thread_h) :
1933 HandshakeClosure("GetStackTraceHandshakeClosure"), _thread_h(thread_h), _depth(0), _retry_handshake(false),
1934 _methods(nullptr), _bcis(nullptr) {
1935 }
1936 ~GetStackTraceHandshakeClosure() {
1937 delete _methods;
1938 delete _bcis;
1939 }
1940
1941 bool read_reset_retry() {
1942 bool ret = _retry_handshake;
1943 // If we re-execute the handshake this method need to return false
1944 // when the handshake cannot be performed. (E.g. thread terminating)
1945 _retry_handshake = false;
1946 return ret;
1947 }
1948
1949 void do_thread(Thread* th) {
1950 if (!Thread::current()->is_Java_thread()) {
1951 _retry_handshake = true;
1952 return;
1953 }
1954
1955 JavaThread* java_thread = JavaThread::cast(th);
1956
1957 if (!java_thread->has_last_Java_frame()) {
1958 return;
1959 }
1960
1961 bool carrier = false;
1962 if (java_lang_VirtualThread::is_instance(_thread_h())) {
1963 // Ensure _thread_h is still mounted to java_thread.
1964 const ContinuationEntry* ce = java_thread->vthread_continuation();
1965 if (ce == nullptr || ce->cont_oop(java_thread) != java_lang_VirtualThread::continuation(_thread_h())) {
1966 // Target thread has been unmounted.
1967 return;
1968 }
1969 } else {
1970 carrier = (java_thread->vthread_continuation() != nullptr);
1971 }
1972
1973 const int max_depth = MaxJavaStackTraceDepth;
1974 const bool skip_hidden = !ShowHiddenFrames;
1975
1976 // Pick minimum length that will cover most cases
1977 int init_length = 64;
1978 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1979 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
1980
1981 int total_count = 0;
1982 for (vframeStream vfst(java_thread, false, false, carrier); // we don't process frames as we don't care about oops
1983 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
1984 vfst.next()) {
1985
1986 if (skip_hidden && (vfst.method()->is_hidden() ||
1987 vfst.method()->is_continuation_enter_intrinsic())) {
1988 continue;
1989 }
1990
1991 _methods->push(vfst.method());
1992 _bcis->push(vfst.bci());
1993 total_count++;
1994 }
1995
1996 _depth = total_count;
1997 }
1998 };
1999
2000 // Handshake with target
2001 ResourceMark rm(THREAD);
2002 HandleMark hm(THREAD);
2003 GetStackTraceHandshakeClosure gsthc(Handle(THREAD, thread_oop));
2004 do {
2005 Handshake::execute(&gsthc, &tlh, java_thread);
2006 } while (gsthc.read_reset_retry());
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 objArrayHandle trace = oopFactory::new_objArray_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 & ~SUSPENDED) {
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 oop java_lang_Throwable::backtrace(oop throwable) {
2311 return throwable->obj_field_acquire(_backtrace_offset);
2312 }
2313
2314
2315 void java_lang_Throwable::set_backtrace(oop throwable, oop 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 Handle _backtrace;
2386 objArrayOop _head;
2387 typeArrayOop _methods;
2388 typeArrayOop _bcis;
2389 objArrayOop _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(objArrayHandle 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(objArrayHandle 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 objArrayOop get_mirrors(objArrayHandle chunk) {
2420 objArrayOop mirrors = objArrayOop(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(objArrayHandle 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(objArrayHandle 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 = Handle(THREAD, _head);
2440 _index = 0;
2441 }
2442
2443 BacktraceBuilder(Thread* thread, objArrayHandle 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 = Handle(thread, _head);
2457 _index = 0;
2458 }
2459
2460 void expand(TRAPS) {
2461 objArrayHandle old_head(THREAD, _head);
2462 PauseNoSafepointVerifier pnsv(&_nsv);
2463
2464 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2465 objArrayHandle 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 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2474 objArrayHandle 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 oop 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 objArrayHandle _result;
2555 objArrayHandle _mirrors;
2556 typeArrayHandle _methods;
2557 typeArrayHandle _bcis;
2558 typeArrayHandle _names;
2559
2560 void init(objArrayHandle 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 = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2567 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2568 _index = 0;
2569 }
2570 }
2571 public:
2572 BacktraceIterator(objArrayHandle 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 objArrayHandle result (thread, objArrayOop(_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 objArrayHandle result (THREAD, objArrayOop(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->name() == vmSymbols::object_initializer_name() &&
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 objArrayHandle backtrace (THREAD, (objArrayOop)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 objArrayHandle 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_objArray(), "Stack trace array should be an array of StackTraceElenent");
2968
2969 if (stack_trace_array_h->length() != depth) {
2970 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2971 }
2972
2973 objArrayHandle result(THREAD, objArrayOop(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 objArrayHandle result(current, objArrayOop(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 = ((objArrayOop)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_initializer()) {
3223 flags |= java_lang_invoke_MemberName::MN_IS_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::_trusted_final_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(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_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_trusted_final(oop field) {
3690 field->bool_field_put(_trusted_final_offset, true);
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::_value_offset;
3991 int java_lang_boxing_object::_long_value_offset;
3992
3993 #define BOXING_FIELDS_DO(macro) \
3994 macro(_value_offset, integerKlass, "value", int_signature, false); \
3995 macro(_long_value_offset, longKlass, "value", long_signature, false);
3996
3997 void java_lang_boxing_object::compute_offsets() {
3998 InstanceKlass* integerKlass = vmClasses::Integer_klass();
3999 InstanceKlass* longKlass = vmClasses::Long_klass();
4000 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4001 }
4002
4003 #if INCLUDE_CDS
4004 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
4005 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4006 }
4007 #endif
4008
4009 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
4010 Klass* k = vmClasses::box_klass(type);
4011 if (k == nullptr) return nullptr;
4012 InstanceKlass* ik = InstanceKlass::cast(k);
4013 if (!ik->is_initialized()) {
4014 ik->initialize(CHECK_NULL);
4015 }
4016 return ik->allocate_instance(THREAD);
4017 }
4018
4019
4020 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
4021 oop box = initialize_and_allocate(type, CHECK_NULL);
4022 if (box == nullptr) return nullptr;
4023 switch (type) {
4024 case T_BOOLEAN:
4025 box->bool_field_put(_value_offset, value->z);
4026 break;
4027 case T_CHAR:
4028 box->char_field_put(_value_offset, value->c);
4029 break;
4030 case T_FLOAT:
4031 box->float_field_put(_value_offset, value->f);
4032 break;
4033 case T_DOUBLE:
4034 box->double_field_put(_long_value_offset, value->d);
4035 break;
4036 case T_BYTE:
4037 box->byte_field_put(_value_offset, value->b);
4038 break;
4039 case T_SHORT:
4040 box->short_field_put(_value_offset, value->s);
4041 break;
4042 case T_INT:
4043 box->int_field_put(_value_offset, value->i);
4044 break;
4045 case T_LONG:
4046 box->long_field_put(_long_value_offset, value->j);
4047 break;
4048 default:
4049 return nullptr;
4050 }
4051 return box;
4052 }
4053
4054
4055 BasicType java_lang_boxing_object::basic_type(oop box) {
4056 if (box == nullptr) return T_ILLEGAL;
4057 BasicType type = vmClasses::box_klass_type(box->klass());
4058 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
4059 return T_ILLEGAL;
4060 return type;
4061 }
4062
4063
4064 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
4065 BasicType type = vmClasses::box_klass_type(box->klass());
4066 switch (type) {
4067 case T_BOOLEAN:
4068 value->z = box->bool_field(_value_offset);
4069 break;
4070 case T_CHAR:
4071 value->c = box->char_field(_value_offset);
4072 break;
4073 case T_FLOAT:
4074 value->f = box->float_field(_value_offset);
4075 break;
4076 case T_DOUBLE:
4077 value->d = box->double_field(_long_value_offset);
4078 break;
4079 case T_BYTE:
4080 value->b = box->byte_field(_value_offset);
4081 break;
4082 case T_SHORT:
4083 value->s = box->short_field(_value_offset);
4084 break;
4085 case T_INT:
4086 value->i = box->int_field(_value_offset);
4087 break;
4088 case T_LONG:
4089 value->j = box->long_field(_long_value_offset);
4090 break;
4091 default:
4092 return T_ILLEGAL;
4093 } // end switch
4094 return type;
4095 }
4096
4097
4098 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
4099 BasicType type = vmClasses::box_klass_type(box->klass());
4100 switch (type) {
4101 case T_BOOLEAN:
4102 box->bool_field_put(_value_offset, value->z);
4103 break;
4104 case T_CHAR:
4105 box->char_field_put(_value_offset, value->c);
4106 break;
4107 case T_FLOAT:
4108 box->float_field_put(_value_offset, value->f);
4109 break;
4110 case T_DOUBLE:
4111 box->double_field_put(_long_value_offset, value->d);
4112 break;
4113 case T_BYTE:
4114 box->byte_field_put(_value_offset, value->b);
4115 break;
4116 case T_SHORT:
4117 box->short_field_put(_value_offset, value->s);
4118 break;
4119 case T_INT:
4120 box->int_field_put(_value_offset, value->i);
4121 break;
4122 case T_LONG:
4123 box->long_field_put(_long_value_offset, value->j);
4124 break;
4125 default:
4126 return T_ILLEGAL;
4127 } // end switch
4128 return type;
4129 }
4130
4131
4132 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
4133 switch (type) {
4134 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
4135 case T_CHAR: st->print("%d", value->c); break;
4136 case T_BYTE: st->print("%d", value->b); break;
4137 case T_SHORT: st->print("%d", value->s); break;
4138 case T_INT: st->print("%d", value->i); break;
4139 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
4140 case T_FLOAT: st->print("%f", value->f); break;
4141 case T_DOUBLE: st->print("%lf", value->d); break;
4142 default: st->print("type %d?", type); break;
4143 }
4144 }
4145
4146
4147 // Support for java_lang_ref_SoftReference
4148 //
4149
4150 int java_lang_ref_SoftReference::_timestamp_offset;
4151 int java_lang_ref_SoftReference::_static_clock_offset;
4152
4153 #define SOFTREFERENCE_FIELDS_DO(macro) \
4154 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
4155 macro(_static_clock_offset, k, "clock", long_signature, true)
4156
4157 void java_lang_ref_SoftReference::compute_offsets() {
4158 InstanceKlass* k = vmClasses::SoftReference_klass();
4159 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4160 }
4161
4162 #if INCLUDE_CDS
4163 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
4164 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4165 }
4166 #endif
4167
4168 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
4169 return ref->long_field(_timestamp_offset);
4170 }
4171
4172 jlong java_lang_ref_SoftReference::clock() {
4173 InstanceKlass* ik = vmClasses::SoftReference_klass();
4174 oop base = ik->static_field_base_raw();
4175 return base->long_field(_static_clock_offset);
4176 }
4177
4178 void java_lang_ref_SoftReference::set_clock(jlong value) {
4179 InstanceKlass* ik = vmClasses::SoftReference_klass();
4180 oop base = ik->static_field_base_raw();
4181 base->long_field_put(_static_clock_offset, value);
4182 }
4183
4184 // Support for java_lang_invoke_DirectMethodHandle
4185
4186 int java_lang_invoke_DirectMethodHandle::_member_offset;
4187
4188 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
4189 oop member_name = nullptr;
4190 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
4191 "a DirectMethodHandle oop is expected");
4192 return dmh->obj_field(_member_offset);
4193 }
4194
4195 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
4196 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
4197
4198 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
4199 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
4200 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4201 }
4202
4203 #if INCLUDE_CDS
4204 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
4205 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4206 }
4207 #endif
4208
4209 // Support for java_lang_invoke_MethodHandle
4210
4211 int java_lang_invoke_MethodHandle::_type_offset;
4212 int java_lang_invoke_MethodHandle::_form_offset;
4213
4214 int java_lang_invoke_MemberName::_clazz_offset;
4215 int java_lang_invoke_MemberName::_name_offset;
4216 int java_lang_invoke_MemberName::_type_offset;
4217 int java_lang_invoke_MemberName::_flags_offset;
4218 int java_lang_invoke_MemberName::_method_offset;
4219 int java_lang_invoke_MemberName::_vmindex_offset;
4220
4221 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
4222 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
4223
4224 int java_lang_invoke_LambdaForm::_vmentry_offset;
4225
4226 #define METHODHANDLE_FIELDS_DO(macro) \
4227 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4228 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
4229
4230 void java_lang_invoke_MethodHandle::compute_offsets() {
4231 InstanceKlass* k = vmClasses::MethodHandle_klass();
4232 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4233 }
4234
4235 #if INCLUDE_CDS
4236 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4237 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4238 }
4239 #endif
4240
4241 #define MEMBERNAME_FIELDS_DO(macro) \
4242 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4243 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4244 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
4245 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
4246 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
4247
4248 void java_lang_invoke_MemberName::compute_offsets() {
4249 InstanceKlass* k = vmClasses::MemberName_klass();
4250 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4251 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4252 }
4253
4254 #if INCLUDE_CDS
4255 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4256 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4257 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4258 }
4259 #endif
4260
4261 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4262 macro(_vmholder_offset, k, "vmholder", class_signature, false)
4263
4264 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4265 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4266 assert(k != nullptr, "jdk mismatch");
4267 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4268 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4269 }
4270
4271 #if INCLUDE_CDS
4272 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4273 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4274 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4275 }
4276 #endif
4277
4278 #define LAMBDAFORM_FIELDS_DO(macro) \
4279 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4280
4281 void java_lang_invoke_LambdaForm::compute_offsets() {
4282 InstanceKlass* k = vmClasses::LambdaForm_klass();
4283 assert (k != nullptr, "jdk mismatch");
4284 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4285 }
4286
4287 #if INCLUDE_CDS
4288 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4289 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4290 }
4291 #endif
4292
4293 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4294 return obj != nullptr && is_subclass(obj->klass());
4295 }
4296
4297 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4298 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4299
4300 #define NEP_FIELDS_DO(macro) \
4301 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
4302 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4303
4304 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4305 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4306 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4307 }
4308
4309 #if INCLUDE_CDS
4310 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4311 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4312 }
4313 #endif
4314
4315 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4316 return entry->obj_field(_method_type_offset);
4317 }
4318
4319 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4320 return entry->long_field(_downcall_stub_address_offset);
4321 }
4322
4323 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4324 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4325 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4326 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4327 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4328 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4329 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4330
4331 #define ABIDescriptor_FIELDS_DO(macro) \
4332 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4333 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4334 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4335 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4336 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4337 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4338 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4339
4340 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4341 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4342 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4343 }
4344
4345 #if INCLUDE_CDS
4346 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4347 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4348 }
4349 #endif
4350
4351 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4352 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4353 }
4354
4355 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4356 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4357 }
4358
4359 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4360 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4361 }
4362
4363 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4364 return entry->int_field(_stackAlignment_offset);
4365 }
4366
4367 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4368 return entry->int_field(_shadowSpace_offset);
4369 }
4370
4371 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4372 return entry->obj_field(_scratch1_offset);
4373 }
4374
4375 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4376 return entry->obj_field(_scratch2_offset);
4377 }
4378
4379 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4380 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4381 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4382 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4383
4384 #define VMStorage_FIELDS_DO(macro) \
4385 macro(_type_offset, k, "type", byte_signature, false); \
4386 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4387 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4388 macro(_debugName_offset, k, "debugName", string_signature, false); \
4389
4390 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4391 return obj != nullptr && is_subclass(obj->klass());
4392 }
4393
4394 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4395 InstanceKlass* k = vmClasses::VMStorage_klass();
4396 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4397 }
4398
4399 #if INCLUDE_CDS
4400 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4401 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4402 }
4403 #endif
4404
4405 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4406 return entry->byte_field(_type_offset);
4407 }
4408
4409 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4410 return entry->int_field(_indexOrOffset_offset);
4411 }
4412
4413 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4414 return entry->short_field(_segmentMaskOrSize_offset);
4415 }
4416
4417 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4418 return entry->obj_field(_debugName_offset);
4419 }
4420
4421 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4422 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4423
4424 #define CallConv_FIELDS_DO(macro) \
4425 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4426 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4427
4428 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4429 return obj != nullptr && is_subclass(obj->klass());
4430 }
4431
4432 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4433 InstanceKlass* k = vmClasses::CallConv_klass();
4434 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4435 }
4436
4437 #if INCLUDE_CDS
4438 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4439 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4440 }
4441 #endif
4442
4443 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4444 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4445 }
4446
4447 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4448 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4449 }
4450
4451 oop java_lang_invoke_MethodHandle::type(oop mh) {
4452 return mh->obj_field(_type_offset);
4453 }
4454
4455 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4456 mh->obj_field_put(_type_offset, mtype);
4457 }
4458
4459 oop java_lang_invoke_MethodHandle::form(oop mh) {
4460 assert(_form_offset != 0, "");
4461 return mh->obj_field(_form_offset);
4462 }
4463
4464 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4465 assert(_form_offset != 0, "");
4466 mh->obj_field_put(_form_offset, lform);
4467 }
4468
4469 /// MemberName accessors
4470
4471 oop java_lang_invoke_MemberName::clazz(oop mname) {
4472 assert(is_instance(mname), "wrong type");
4473 return mname->obj_field(_clazz_offset);
4474 }
4475
4476 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4477 assert(is_instance(mname), "wrong type");
4478 mname->obj_field_put(_clazz_offset, clazz);
4479 }
4480
4481 oop java_lang_invoke_MemberName::name(oop mname) {
4482 assert(is_instance(mname), "wrong type");
4483 return mname->obj_field(_name_offset);
4484 }
4485
4486 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4487 assert(is_instance(mname), "wrong type");
4488 mname->obj_field_put(_name_offset, name);
4489 }
4490
4491 oop java_lang_invoke_MemberName::type(oop mname) {
4492 assert(is_instance(mname), "wrong type");
4493 return mname->obj_field(_type_offset);
4494 }
4495
4496 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4497 assert(is_instance(mname), "wrong type");
4498 mname->obj_field_put(_type_offset, type);
4499 }
4500
4501 int java_lang_invoke_MemberName::flags(oop mname) {
4502 assert(is_instance(mname), "wrong type");
4503 return mname->int_field(_flags_offset);
4504 }
4505
4506 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4507 assert(is_instance(mname), "wrong type");
4508 mname->int_field_put(_flags_offset, flags);
4509 }
4510
4511
4512 // Return vmtarget from ResolvedMethodName method field through indirection
4513 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4514 assert(is_instance(mname), "wrong type");
4515 oop method = mname->obj_field(_method_offset);
4516 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4517 }
4518
4519 bool java_lang_invoke_MemberName::is_method(oop mname) {
4520 assert(is_instance(mname), "must be MemberName");
4521 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
4522 }
4523
4524 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4525 assert(is_instance(mname), "wrong type");
4526 mname->obj_field_put(_method_offset, resolved_method);
4527 }
4528
4529 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4530 assert(is_instance(mname), "wrong type");
4531 return (intptr_t) mname->address_field(_vmindex_offset);
4532 }
4533
4534 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4535 assert(is_instance(mname), "wrong type");
4536 mname->address_field_put(_vmindex_offset, (address) index);
4537 }
4538
4539
4540 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4541 assert(is_instance(resolved_method), "wrong type");
4542 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4543 assert(m->is_method(), "must be");
4544 return m;
4545 }
4546
4547 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4548 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4549 assert(is_instance(resolved_method), "wrong type");
4550 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4551 }
4552
4553 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4554 assert(is_instance(resolved_method), "wrong type");
4555 resolved_method->obj_field_put(_vmholder_offset, holder);
4556 }
4557
4558 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4559 const Method* method = m();
4560
4561 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4562 oop resolved_method = ResolvedMethodTable::find_method(method);
4563 if (resolved_method != nullptr) {
4564 return resolved_method;
4565 }
4566
4567 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4568 if (!k->is_initialized()) {
4569 k->initialize(CHECK_NULL);
4570 }
4571
4572 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4573
4574 NoSafepointVerifier nsv;
4575
4576 if (method->is_old()) {
4577 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4578 method->get_new_method();
4579 }
4580
4581 InstanceKlass* holder = method->method_holder();
4582
4583 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4584 // Add a reference to the loader (actually mirror because hidden classes may not have
4585 // distinct loaders) to ensure the metadata is kept alive.
4586 // This mirror may be different than the one in clazz field.
4587 set_vmholder(new_resolved_method, holder->java_mirror());
4588
4589 // Set flag in class to indicate this InstanceKlass has entries in the table
4590 // to avoid walking table during redefinition if none of the redefined classes
4591 // have any membernames in the table.
4592 holder->set_has_resolved_methods();
4593
4594 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4595 }
4596
4597 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4598 assert(is_instance(lform), "wrong type");
4599 return lform->obj_field(_vmentry_offset);
4600 }
4601
4602
4603 // Support for java_lang_invoke_MethodType
4604
4605 int java_lang_invoke_MethodType::_rtype_offset;
4606 int java_lang_invoke_MethodType::_ptypes_offset;
4607
4608 #define METHODTYPE_FIELDS_DO(macro) \
4609 macro(_rtype_offset, k, "rtype", class_signature, false); \
4610 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4611
4612 void java_lang_invoke_MethodType::compute_offsets() {
4613 InstanceKlass* k = vmClasses::MethodType_klass();
4614 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4615 }
4616
4617 #if INCLUDE_CDS
4618 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4619 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4620 }
4621 #endif
4622
4623 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4624 st->print("(");
4625 objArrayOop pts = ptypes(mt);
4626 if (pts != nullptr) {
4627 for (int i = 0, limit = pts->length(); i < limit; i++) {
4628 java_lang_Class::print_signature(pts->obj_at(i), st);
4629 }
4630 } else {
4631 st->print("null");
4632 }
4633 st->print(")");
4634 oop rt = rtype(mt);
4635 if (rt != nullptr) {
4636 java_lang_Class::print_signature(rt, st);
4637 } else {
4638 st->print("null");
4639 }
4640 }
4641
4642 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4643 ResourceMark rm;
4644 stringStream buffer(128);
4645 print_signature(mt, &buffer);
4646 const char* sigstr = buffer.base();
4647 int siglen = (int) buffer.size();
4648 Symbol *name;
4649 if (!intern_if_not_found) {
4650 name = SymbolTable::probe(sigstr, siglen);
4651 } else {
4652 name = SymbolTable::new_symbol(sigstr, siglen);
4653 }
4654 return name;
4655 }
4656
4657 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4658 if (mt1 == mt2)
4659 return true;
4660 if (rtype(mt1) != rtype(mt2))
4661 return false;
4662 if (ptype_count(mt1) != ptype_count(mt2))
4663 return false;
4664 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4665 if (ptype(mt1, i) != ptype(mt2, i))
4666 return false;
4667 }
4668 return true;
4669 }
4670
4671 oop java_lang_invoke_MethodType::rtype(oop mt) {
4672 assert(is_instance(mt), "must be a MethodType");
4673 return mt->obj_field(_rtype_offset);
4674 }
4675
4676 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4677 assert(is_instance(mt), "must be a MethodType");
4678 return (objArrayOop) mt->obj_field(_ptypes_offset);
4679 }
4680
4681 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4682 return ptypes(mt)->obj_at(idx);
4683 }
4684
4685 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4686 return ptypes(mt)->length();
4687 }
4688
4689 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4690 objArrayOop pts = ptypes(mt);
4691 int count = pts->length();
4692 int slots = 0;
4693 for (int i = 0; i < count; i++) {
4694 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4695 slots += type2size[bt];
4696 }
4697 return slots;
4698 }
4699
4700 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4701 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4702 return type2size[bt];
4703 }
4704
4705
4706 // Support for java_lang_invoke_CallSite
4707
4708 int java_lang_invoke_CallSite::_target_offset;
4709 int java_lang_invoke_CallSite::_vmdependencies_offset;
4710 int java_lang_invoke_CallSite::_last_cleanup_offset;
4711
4712 #define CALLSITE_FIELDS_DO(macro) \
4713 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
4714
4715 void java_lang_invoke_CallSite::compute_offsets() {
4716 InstanceKlass* k = vmClasses::CallSite_klass();
4717 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4718 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4719 }
4720
4721 #if INCLUDE_CDS
4722 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4723 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4724 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4725 }
4726 #endif
4727
4728 DependencyContext java_lang_invoke_CallSite::vmdependencies(oop call_site) {
4729 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4730 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4731 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4732 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4733 return dep_ctx;
4734 }
4735
4736 // Support for java_lang_invoke_ConstantCallSite
4737
4738 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4739
4740 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4741 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4742
4743 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4744 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4745 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4746 }
4747
4748 #if INCLUDE_CDS
4749 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4750 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4751 }
4752 #endif
4753
4754 // Support for java_lang_ClassLoader
4755
4756 int java_lang_ClassLoader::_loader_data_offset;
4757 int java_lang_ClassLoader::_parallelCapable_offset;
4758 int java_lang_ClassLoader::_name_offset;
4759 int java_lang_ClassLoader::_nameAndId_offset;
4760 int java_lang_ClassLoader::_unnamedModule_offset;
4761 int java_lang_ClassLoader::_parent_offset;
4762
4763 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4764 assert(loader != nullptr, "loader must not be null");
4765 assert(oopDesc::is_oop(loader), "loader must be oop");
4766 return AtomicAccess::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4767 }
4768
4769 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4770 assert(loader != nullptr, "loader must not be null");
4771 assert(oopDesc::is_oop(loader), "loader must be oop");
4772 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4773 }
4774
4775 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4776 assert(loader != nullptr, "loader must not be null");
4777 assert(oopDesc::is_oop(loader), "loader must be oop");
4778 AtomicAccess::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4779 }
4780
4781 #define CLASSLOADER_FIELDS_DO(macro) \
4782 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4783 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4784 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
4785 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4786 macro(_parent_offset, k1, "parent", classloader_signature, false)
4787
4788 void java_lang_ClassLoader::compute_offsets() {
4789 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4790 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4791
4792 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4793 }
4794
4795 #if INCLUDE_CDS
4796 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4797 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4798 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4799 }
4800 #endif
4801
4802 oop java_lang_ClassLoader::parent(oop loader) {
4803 assert(is_instance(loader), "loader must be oop");
4804 return loader->obj_field(_parent_offset);
4805 }
4806
4807 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4808 assert(is_instance(loader), "loader must be oop");
4809 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4810 }
4811
4812 // Returns the name field of this class loader. If the name field has not
4813 // been set, null will be returned.
4814 oop java_lang_ClassLoader::name(oop loader) {
4815 assert(is_instance(loader), "loader must be oop");
4816 return loader->obj_field(_name_offset);
4817 }
4818
4819 // Returns the nameAndId field of this class loader. The format is
4820 // as follows:
4821 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4822 // If the defining loader has no name then <qualified-class-name> @<id>
4823 // If built-in loader, then omit '@<id>' as there is only one instance.
4824 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4825 oop java_lang_ClassLoader::nameAndId(oop loader) {
4826 assert(is_instance(loader), "loader must be oop");
4827 return loader->obj_field(_nameAndId_offset);
4828 }
4829
4830 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4831 assert(is_instance(loader), "loader must be oop");
4832 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4833 oop acl = loader;
4834 DEBUG_ONLY(jint loop_count = 0);
4835 // This loop taken verbatim from ClassLoader.java:
4836 do {
4837 acl = parent(acl);
4838 if (cl == acl) {
4839 return true;
4840 }
4841 assert(++loop_count > 0, "loop_count overflow");
4842 } while (acl != nullptr);
4843 return false;
4844 }
4845
4846 bool java_lang_ClassLoader::is_instance(oop obj) {
4847 return obj != nullptr && is_subclass(obj->klass());
4848 }
4849
4850
4851 // For class loader classes, parallelCapable defined
4852 // based on non-null field
4853 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4854 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4855 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4856 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4857 }
4858
4859 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4860 oop cl = SystemDictionary::java_system_loader();
4861 while(cl != nullptr) {
4862 if (cl == loader) return true;
4863 cl = parent(cl);
4864 }
4865 return false;
4866 }
4867
4868 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4869 assert(is_instance(loader), "loader must be oop");
4870 return loader->obj_field(_unnamedModule_offset);
4871 }
4872
4873 // Support for java_lang_System
4874 //
4875
4876 int java_lang_System::_static_in_offset;
4877 int java_lang_System::_static_out_offset;
4878 int java_lang_System::_static_err_offset;
4879
4880 #define SYSTEM_FIELDS_DO(macro) \
4881 macro(_static_in_offset, k, "in", input_stream_signature, true); \
4882 macro(_static_out_offset, k, "out", print_stream_signature, true); \
4883 macro(_static_err_offset, k, "err", print_stream_signature, true);
4884
4885 void java_lang_System::compute_offsets() {
4886 InstanceKlass* k = vmClasses::System_klass();
4887 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4888 }
4889
4890 #if INCLUDE_CDS
4891 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4892 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4893 }
4894 #endif
4895
4896 // Support for jdk_internal_misc_UnsafeConstants
4897 //
4898 class UnsafeConstantsFixup : public FieldClosure {
4899 private:
4900 int _address_size;
4901 int _page_size;
4902 bool _big_endian;
4903 bool _use_unaligned_access;
4904 int _data_cache_line_flush_size;
4905 public:
4906 UnsafeConstantsFixup() {
4907 // round up values for all static final fields
4908 _address_size = sizeof(void*);
4909 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4910 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4911 _use_unaligned_access = UseUnalignedAccesses;
4912 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4913 }
4914
4915 void do_field(fieldDescriptor* fd) {
4916 oop mirror = fd->field_holder()->java_mirror();
4917 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4918 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4919 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4920 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4921 if (fd->name() == vmSymbols::address_size_name()) {
4922 mirror->int_field_put(fd->offset(), _address_size);
4923 } else if (fd->name() == vmSymbols::page_size_name()) {
4924 mirror->int_field_put(fd->offset(), _page_size);
4925 } else if (fd->name() == vmSymbols::big_endian_name()) {
4926 mirror->bool_field_put(fd->offset(), _big_endian);
4927 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4928 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4929 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4930 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4931 } else {
4932 assert(false, "unexpected UnsafeConstants field");
4933 }
4934 }
4935 };
4936
4937 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4938 UnsafeConstantsFixup fixup;
4939 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4940 }
4941
4942
4943 // java_lang_StackTraceElement
4944
4945 int java_lang_StackTraceElement::_methodName_offset;
4946 int java_lang_StackTraceElement::_fileName_offset;
4947 int java_lang_StackTraceElement::_lineNumber_offset;
4948 int java_lang_StackTraceElement::_moduleName_offset;
4949 int java_lang_StackTraceElement::_moduleVersion_offset;
4950 int java_lang_StackTraceElement::_classLoaderName_offset;
4951 int java_lang_StackTraceElement::_declaringClass_offset;
4952 int java_lang_StackTraceElement::_declaringClassObject_offset;
4953
4954 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4955 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4956 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4957 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
4958 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4959 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
4960 macro(_methodName_offset, k, "methodName", string_signature, false); \
4961 macro(_fileName_offset, k, "fileName", string_signature, false); \
4962 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
4963
4964 // Support for java_lang_StackTraceElement
4965 void java_lang_StackTraceElement::compute_offsets() {
4966 InstanceKlass* k = vmClasses::StackTraceElement_klass();
4967 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4968 }
4969
4970 #if INCLUDE_CDS
4971 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4972 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4973 }
4974 #endif
4975
4976 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4977 element->obj_field_put(_fileName_offset, value);
4978 }
4979
4980 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4981 element->obj_field_put(_declaringClass_offset, value);
4982 }
4983
4984 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4985 element->obj_field_put(_methodName_offset, value);
4986 }
4987
4988 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4989 element->int_field_put(_lineNumber_offset, value);
4990 }
4991
4992 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4993 element->obj_field_put(_moduleName_offset, value);
4994 }
4995
4996 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4997 element->obj_field_put(_moduleVersion_offset, value);
4998 }
4999
5000 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
5001 element->obj_field_put(_classLoaderName_offset, value);
5002 }
5003
5004 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
5005 element->obj_field_put(_declaringClassObject_offset, value);
5006 }
5007
5008
5009 // java_lang_AssertionStatusDirectives
5010
5011 int java_lang_AssertionStatusDirectives::_classes_offset;
5012 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
5013 int java_lang_AssertionStatusDirectives::_packages_offset;
5014 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
5015 int java_lang_AssertionStatusDirectives::_deflt_offset;
5016
5017 // Support for java Assertions - java_lang_AssertionStatusDirectives.
5018 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
5019 macro(_classes_offset, k, "classes", string_array_signature, false); \
5020 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
5021 macro(_packages_offset, k, "packages", string_array_signature, false); \
5022 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
5023 macro(_deflt_offset, k, "deflt", bool_signature, false)
5024
5025 void java_lang_AssertionStatusDirectives::compute_offsets() {
5026 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
5027 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5028 }
5029
5030 #if INCLUDE_CDS
5031 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
5032 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5033 }
5034 #endif
5035
5036 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
5037 o->obj_field_put(_classes_offset, val);
5038 }
5039
5040 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
5041 o->obj_field_put(_classEnabled_offset, val);
5042 }
5043
5044 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
5045 o->obj_field_put(_packages_offset, val);
5046 }
5047
5048 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
5049 o->obj_field_put(_packageEnabled_offset, val);
5050 }
5051
5052 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
5053 o->bool_field_put(_deflt_offset, val);
5054 }
5055
5056 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
5057
5058 #define AOS_FIELDS_DO(macro) \
5059 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
5060
5061 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
5062 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
5063 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5064 }
5065
5066 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
5067 assert(_owner_offset != 0, "Must be initialized");
5068 return obj->obj_field(_owner_offset);
5069 }
5070
5071 #if INCLUDE_CDS
5072 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
5073 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5074 }
5075 #endif
5076
5077 int vector_VectorPayload::_payload_offset;
5078
5079 #define VECTORPAYLOAD_FIELDS_DO(macro) \
5080 macro(_payload_offset, k, "payload", object_signature, false)
5081
5082 void vector_VectorPayload::compute_offsets() {
5083 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
5084 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5085 }
5086
5087 #if INCLUDE_CDS
5088 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
5089 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5090 }
5091 #endif
5092
5093 void vector_VectorPayload::set_payload(oop o, oop val) {
5094 o->obj_field_put(_payload_offset, val);
5095 }
5096
5097 bool vector_VectorPayload::is_instance(oop obj) {
5098 return obj != nullptr && is_subclass(obj->klass());
5099 }
5100
5101 int java_lang_Integer_IntegerCache::_static_cache_offset;
5102 int java_lang_Long_LongCache::_static_cache_offset;
5103 int java_lang_Character_CharacterCache::_static_cache_offset;
5104 int java_lang_Short_ShortCache::_static_cache_offset;
5105 int java_lang_Byte_ByteCache::_static_cache_offset;
5106
5107 #define INTEGER_CACHE_FIELDS_DO(macro) \
5108 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5109
5110 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5111 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5112 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5113 }
5114
5115 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5116 oop base = ik->static_field_base_raw();
5117 return objArrayOop(base->obj_field(_static_cache_offset));
5118 }
5119
5120 Symbol* java_lang_Integer_IntegerCache::symbol() {
5121 return vmSymbols::java_lang_Integer_IntegerCache();
5122 }
5123
5124 #if INCLUDE_CDS
5125 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5126 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5127 }
5128 #endif
5129 #undef INTEGER_CACHE_FIELDS_DO
5130
5131 jint java_lang_Integer::value(oop obj) {
5132 jvalue v;
5133 java_lang_boxing_object::get_value(obj, &v);
5134 return v.i;
5135 }
5136
5137 #define LONG_CACHE_FIELDS_DO(macro) \
5138 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5139
5140 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5141 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5142 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5143 }
5144
5145 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5146 oop base = ik->static_field_base_raw();
5147 return objArrayOop(base->obj_field(_static_cache_offset));
5148 }
5149
5150 Symbol* java_lang_Long_LongCache::symbol() {
5151 return vmSymbols::java_lang_Long_LongCache();
5152 }
5153
5154 #if INCLUDE_CDS
5155 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5156 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5157 }
5158 #endif
5159 #undef LONG_CACHE_FIELDS_DO
5160
5161 jlong java_lang_Long::value(oop obj) {
5162 jvalue v;
5163 java_lang_boxing_object::get_value(obj, &v);
5164 return v.j;
5165 }
5166
5167 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5168 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5169
5170 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5171 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5172 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5173 }
5174
5175 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5176 oop base = ik->static_field_base_raw();
5177 return objArrayOop(base->obj_field(_static_cache_offset));
5178 }
5179
5180 Symbol* java_lang_Character_CharacterCache::symbol() {
5181 return vmSymbols::java_lang_Character_CharacterCache();
5182 }
5183
5184 #if INCLUDE_CDS
5185 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5186 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5187 }
5188 #endif
5189 #undef CHARACTER_CACHE_FIELDS_DO
5190
5191 jchar java_lang_Character::value(oop obj) {
5192 jvalue v;
5193 java_lang_boxing_object::get_value(obj, &v);
5194 return v.c;
5195 }
5196
5197 #define SHORT_CACHE_FIELDS_DO(macro) \
5198 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5199
5200 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5201 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5202 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5203 }
5204
5205 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5206 oop base = ik->static_field_base_raw();
5207 return objArrayOop(base->obj_field(_static_cache_offset));
5208 }
5209
5210 Symbol* java_lang_Short_ShortCache::symbol() {
5211 return vmSymbols::java_lang_Short_ShortCache();
5212 }
5213
5214 #if INCLUDE_CDS
5215 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5216 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5217 }
5218 #endif
5219 #undef SHORT_CACHE_FIELDS_DO
5220
5221 jshort java_lang_Short::value(oop obj) {
5222 jvalue v;
5223 java_lang_boxing_object::get_value(obj, &v);
5224 return v.s;
5225 }
5226
5227 #define BYTE_CACHE_FIELDS_DO(macro) \
5228 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5229
5230 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5231 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5232 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5233 }
5234
5235 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5236 oop base = ik->static_field_base_raw();
5237 return objArrayOop(base->obj_field(_static_cache_offset));
5238 }
5239
5240 Symbol* java_lang_Byte_ByteCache::symbol() {
5241 return vmSymbols::java_lang_Byte_ByteCache();
5242 }
5243
5244 #if INCLUDE_CDS
5245 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5246 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5247 }
5248 #endif
5249 #undef BYTE_CACHE_FIELDS_DO
5250
5251 jbyte java_lang_Byte::value(oop obj) {
5252 jvalue v;
5253 java_lang_boxing_object::get_value(obj, &v);
5254 return v.b;
5255 }
5256
5257 int java_lang_Boolean::_static_TRUE_offset;
5258 int java_lang_Boolean::_static_FALSE_offset;
5259
5260 #define BOOLEAN_FIELDS_DO(macro) \
5261 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5262 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5263
5264
5265 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5266 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5267 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5268 }
5269
5270 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5271 oop base = ik->static_field_base_raw();
5272 return base->obj_field(_static_TRUE_offset);
5273 }
5274
5275 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5276 oop base = ik->static_field_base_raw();
5277 return base->obj_field(_static_FALSE_offset);
5278 }
5279
5280 Symbol* java_lang_Boolean::symbol() {
5281 return vmSymbols::java_lang_Boolean();
5282 }
5283
5284 #if INCLUDE_CDS
5285 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5286 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5287 }
5288 #endif
5289 #undef BOOLEAN_CACHE_FIELDS_DO
5290
5291 jboolean java_lang_Boolean::value(oop obj) {
5292 jvalue v;
5293 java_lang_boxing_object::get_value(obj, &v);
5294 return v.z;
5295 }
5296
5297 // java_lang_reflect_RecordComponent
5298
5299 int java_lang_reflect_RecordComponent::_clazz_offset;
5300 int java_lang_reflect_RecordComponent::_name_offset;
5301 int java_lang_reflect_RecordComponent::_type_offset;
5302 int java_lang_reflect_RecordComponent::_accessor_offset;
5303 int java_lang_reflect_RecordComponent::_signature_offset;
5304 int java_lang_reflect_RecordComponent::_annotations_offset;
5305 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5306
5307 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5308 macro(_clazz_offset, k, "clazz", class_signature, false); \
5309 macro(_name_offset, k, "name", string_signature, false); \
5310 macro(_type_offset, k, "type", class_signature, false); \
5311 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5312 macro(_signature_offset, k, "signature", string_signature, false); \
5313 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5314 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5315
5316 // Support for java_lang_reflect_RecordComponent
5317 void java_lang_reflect_RecordComponent::compute_offsets() {
5318 InstanceKlass* k = vmClasses::RecordComponent_klass();
5319 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5320 }
5321
5322 #if INCLUDE_CDS
5323 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5324 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5325 }
5326 #endif
5327
5328 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5329 element->obj_field_put(_clazz_offset, value);
5330 }
5331
5332 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5333 element->obj_field_put(_name_offset, value);
5334 }
5335
5336 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5337 element->obj_field_put(_type_offset, value);
5338 }
5339
5340 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5341 element->obj_field_put(_accessor_offset, value);
5342 }
5343
5344 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5345 element->obj_field_put(_signature_offset, value);
5346 }
5347
5348 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5349 element->obj_field_put(_annotations_offset, value);
5350 }
5351
5352 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5353 element->obj_field_put(_typeAnnotations_offset, value);
5354 }
5355
5356 // java_lang_InternalError
5357 int java_lang_InternalError::_during_unsafe_access_offset;
5358
5359 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5360 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5361 }
5362
5363 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5364 return internal_error->bool_field(_during_unsafe_access_offset);
5365 }
5366
5367 void java_lang_InternalError::compute_offsets() {
5368 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5369 }
5370
5371 #if INCLUDE_CDS
5372 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5373 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5374 }
5375 #endif
5376
5377 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5378 f(java_lang_Class) \
5379 f(java_lang_String) \
5380 f(java_lang_ref_Reference) \
5381 //end
5382
5383 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5384 f(java_lang_System) \
5385 f(java_lang_ClassLoader) \
5386 f(java_lang_Throwable) \
5387 f(java_lang_Thread) \
5388 f(java_lang_Thread_FieldHolder) \
5389 f(java_lang_Thread_Constants) \
5390 f(java_lang_ThreadGroup) \
5391 f(java_lang_VirtualThread) \
5392 f(java_lang_InternalError) \
5393 f(java_lang_AssertionStatusDirectives) \
5394 f(java_lang_ref_SoftReference) \
5395 f(java_lang_invoke_MethodHandle) \
5396 f(java_lang_invoke_DirectMethodHandle) \
5397 f(java_lang_invoke_MemberName) \
5398 f(java_lang_invoke_ResolvedMethodName) \
5399 f(java_lang_invoke_LambdaForm) \
5400 f(java_lang_invoke_MethodType) \
5401 f(java_lang_invoke_CallSite) \
5402 f(java_lang_invoke_ConstantCallSite) \
5403 f(java_lang_reflect_AccessibleObject) \
5404 f(java_lang_reflect_Method) \
5405 f(java_lang_reflect_Constructor) \
5406 f(java_lang_reflect_Field) \
5407 f(java_lang_reflect_RecordComponent) \
5408 f(reflect_ConstantPool) \
5409 f(java_lang_reflect_Parameter) \
5410 f(java_lang_Module) \
5411 f(java_lang_StackTraceElement) \
5412 f(java_lang_ClassFrameInfo) \
5413 f(java_lang_StackFrameInfo) \
5414 f(java_lang_LiveStackFrameInfo) \
5415 f(jdk_internal_vm_ContinuationScope) \
5416 f(jdk_internal_vm_Continuation) \
5417 f(jdk_internal_vm_StackChunk) \
5418 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5419 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5420 f(jdk_internal_foreign_abi_ABIDescriptor) \
5421 f(jdk_internal_foreign_abi_VMStorage) \
5422 f(jdk_internal_foreign_abi_CallConv) \
5423 f(jdk_internal_misc_UnsafeConstants) \
5424 f(java_lang_boxing_object) \
5425 f(vector_VectorPayload) \
5426 //end
5427
5428 #define BASIC_JAVA_CLASSES_DO(f) \
5429 BASIC_JAVA_CLASSES_DO_PART1(f) \
5430 BASIC_JAVA_CLASSES_DO_PART2(f)
5431
5432 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5433
5434 // Compute field offsets of all the classes in this file
5435 void JavaClasses::compute_offsets() {
5436 if (CDSConfig::is_using_archive()) {
5437 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5438 JvmtiExport::has_early_class_hook_env()),
5439 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5440 // None of the classes used by the rest of this function can be replaced by
5441 // JVMTI ClassFileLoadHook.
5442 // We are safe to use the archived offsets, which have already been restored
5443 // by JavaClasses::serialize_offsets, without computing the offsets again.
5444 return;
5445 }
5446
5447 // We have already called the compute_offsets() of the
5448 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5449 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5450 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5451 }
5452
5453 #if INCLUDE_CDS
5454 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5455
5456 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5457 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5458 }
5459 #endif
5460
5461 #if INCLUDE_CDS_JAVA_HEAP
5462 bool JavaClasses::is_supported_for_archiving(oop obj) {
5463 Klass* klass = obj->klass();
5464
5465 if (!CDSConfig::is_dumping_method_handles()) {
5466 // These are supported by CDS only when CDSConfig::is_dumping_method_handles() is enabled.
5467 if (klass == vmClasses::ResolvedMethodName_klass() ||
5468 klass == vmClasses::MemberName_klass()) {
5469 return false;
5470 }
5471 }
5472
5473 if (!AOTReferenceObjSupport::is_enabled() && klass->is_subclass_of(vmClasses::Reference_klass())) {
5474 return false;
5475 }
5476
5477 return true;
5478 }
5479 #endif
5480
5481 #ifndef PRODUCT
5482
5483 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5484
5485 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5486 const char* field_sig) {
5487 EXCEPTION_MARK;
5488 fieldDescriptor fd;
5489 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5490 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5491 InstanceKlass* ik = InstanceKlass::cast(k);
5492 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5493 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5494 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5495 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5496 return false;
5497 }
5498 if (fd.is_static()) {
5499 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5500 return false;
5501 }
5502 if (fd.offset() == deserialized_offset ) {
5503 return true;
5504 } else {
5505 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5506 klass_name, field_name, deserialized_offset, fd.offset());
5507 return false;
5508 }
5509 }
5510
5511 void JavaClasses::check_offsets() {
5512 bool valid = true;
5513
5514 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5515 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5516
5517 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5518 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5519
5520 // Boxed primitive objects (java_lang_boxing_object)
5521
5522 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
5523 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5524 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
5525 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5526 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
5527 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
5528 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
5529 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5530
5531 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5532 }
5533
5534 #endif // PRODUCT
5535
5536 int InjectedField::compute_offset() {
5537 InstanceKlass* ik = klass();
5538 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5539 if (!may_be_java && !fs.field_flags().is_injected()) {
5540 // Only look at injected fields
5541 continue;
5542 }
5543 if (fs.name() == name() && fs.signature() == signature()) {
5544 return fs.offset();
5545 }
5546 }
5547 ResourceMark rm;
5548 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)" : "");
5549 #ifndef PRODUCT
5550 ik->print();
5551 tty->print_cr("all fields:");
5552 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5553 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());
5554 }
5555 #endif //PRODUCT
5556 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5557 return -1;
5558 }
5559
5560 void javaClasses_init() {
5561 JavaClasses::compute_offsets();
5562 JavaClasses::check_offsets();
5563 }