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