1 /*
2 * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "cds/aotMetaspace.hpp"
26 #include "cds/aotReferenceObjSupport.hpp"
27 #include "cds/archiveBuilder.hpp"
28 #include "cds/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/init.hpp"
75 #include "runtime/interfaceSupport.inline.hpp"
76 #include "runtime/java.hpp"
77 #include "runtime/javaCalls.hpp"
78 #include "runtime/javaThread.hpp"
79 #include "runtime/jniHandles.inline.hpp"
80 #include "runtime/reflection.hpp"
81 #include "runtime/safepoint.hpp"
82 #include "runtime/safepointVerifiers.hpp"
83 #include "runtime/threadSMR.hpp"
84 #include "runtime/vframe.inline.hpp"
85 #include "runtime/vm_version.hpp"
86 #include "utilities/align.hpp"
87 #include "utilities/globalDefinitions.hpp"
88 #include "utilities/growableArray.hpp"
89 #include "utilities/preserveException.hpp"
90 #include "utilities/utf8.hpp"
91 #if INCLUDE_JVMCI
92 #include "jvmci/jvmciJavaClasses.hpp"
93 #endif
94
95 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
96 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
97
98 InjectedField JavaClasses::_injected_fields[] = {
99 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
100 };
101
102 // Register native methods of Object
103 void java_lang_Object::register_natives(TRAPS) {
104 InstanceKlass* obj = vmClasses::Object_klass();
105 Method::register_native(obj, vmSymbols::hashCode_name(),
106 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
107 Method::register_native(obj, vmSymbols::wait_name(),
108 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
109 Method::register_native(obj, vmSymbols::notify_name(),
110 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
111 Method::register_native(obj, vmSymbols::notifyAll_name(),
112 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
113 Method::register_native(obj, vmSymbols::clone_name(),
114 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
115 }
116
117 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
118 return _injected_fields[(int)id].compute_offset();
119 }
120
121 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
122 *field_count = 0;
123
124 vmSymbolID sid = vmSymbols::find_sid(class_name);
125 if (sid == vmSymbolID::NO_SID) {
126 // Only well known classes can inject fields
127 return nullptr;
128 }
129
130 int count = 0;
131 int start = -1;
132
133 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
134 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \
135 count++; \
136 if (start == -1) { \
137 start = (int)InjectedFieldID::klass##_##name##_enum; \
138 } \
139 }
140 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
141 #undef LOOKUP_INJECTED_FIELD
142
143 if (start != -1) {
144 *field_count = count;
145 return _injected_fields + start;
146 }
147 return nullptr;
148 }
149
150
151 // Helpful routine for computing field offsets at run time rather than hardcoding them
152 // Finds local fields only, including static fields. Static field offsets are from the
153 // beginning of the mirror.
154 void JavaClasses::compute_offset(int &dest_offset,
155 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
156 bool is_static) {
157 fieldDescriptor fd;
158 if (ik == nullptr) {
159 ResourceMark rm;
160 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
161 vm_exit_during_initialization("Invalid layout of well-known class");
162 }
163
164 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
165 ResourceMark rm;
166 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
167 name_symbol->as_C_string(), signature_symbol->as_C_string());
168 #ifndef PRODUCT
169 // Prints all fields and offsets
170 Log(class) lt;
171 LogStream ls(lt.error());
172 ik->print_on(&ls);
173 #endif //PRODUCT
174 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
175 }
176 dest_offset = fd.offset();
177 }
178
179 // Overloading to pass name as a string.
180 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
181 const char* name_string, Symbol* signature_symbol,
182 bool is_static) {
183 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
184 if (name == nullptr) {
185 ResourceMark rm;
186 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
187 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
188 }
189 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
190 }
191
192 // java_lang_String
193
194 int java_lang_String::_value_offset;
195 int java_lang_String::_hash_offset;
196 int java_lang_String::_hashIsZero_offset;
197 int java_lang_String::_coder_offset;
198 int java_lang_String::_flags_offset;
199
200 bool java_lang_String::_initialized;
201
202
203 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
204 uint8_t* addr = flags_addr(java_string);
205 uint8_t value = AtomicAccess::load(addr);
206 while ((value & flag_mask) == 0) {
207 uint8_t old_value = value;
208 value |= flag_mask;
209 value = AtomicAccess::cmpxchg(addr, old_value, value);
210 if (value == old_value) return false; // Flag bit changed from 0 to 1.
211 }
212 return true; // Flag bit is already 1.
213 }
214
215 #define STRING_FIELDS_DO(macro) \
216 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
217 macro(_hash_offset, k, "hash", int_signature, false); \
218 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
219 macro(_coder_offset, k, "coder", byte_signature, false);
220
221 void java_lang_String::compute_offsets() {
222 if (_initialized) {
223 return;
224 }
225
226 InstanceKlass* k = vmClasses::String_klass();
227 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
228 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
229
230 _initialized = true;
231 }
232
233 #if INCLUDE_CDS
234 void java_lang_String::serialize_offsets(SerializeClosure* f) {
235 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
236 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
237 f->do_bool(&_initialized);
238 }
239 #endif
240
241 class CompactStringsFixup : public FieldClosure {
242 private:
243 bool _value;
244
245 public:
246 CompactStringsFixup(bool value) : _value(value) {}
247
248 void do_field(fieldDescriptor* fd) {
249 if (fd->name() == vmSymbols::compact_strings_name()) {
250 oop mirror = fd->field_holder()->java_mirror();
251 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String");
252 assert(mirror != nullptr, "String must have mirror already");
253 mirror->bool_field_put(fd->offset(), _value);
254 }
255 }
256 };
257
258 void java_lang_String::set_compact_strings(bool value) {
259 CompactStringsFixup fix(value);
260 vmClasses::String_klass()->do_local_static_fields(&fix);
261 }
262
263 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
264 assert(_initialized, "Must be initialized");
265 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
266
267 // Create the String object first, so there's a chance that the String
268 // and the char array it points to end up in the same cache line.
269 oop obj;
270 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH);
271
272 // Create the char array. The String object must be handlized here
273 // because GC can happen as a result of the allocation attempt.
274 Handle h_obj(THREAD, obj);
275 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
276 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
277
278 // Point the String at the char array
279 obj = h_obj();
280 set_value(obj, buffer);
281 // No need to zero the offset, allocation zero'ed the entire String object
282 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
283 return h_obj;
284 }
285
286 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
287 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
288 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
289 typeArrayOop buffer = value(h_obj());
290 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
291 if (is_latin1) {
292 for (int index = 0; index < length; index++) {
293 buffer->byte_at_put(index, (jbyte)unicode[index]);
294 }
295 } else {
296 for (int index = 0; index < length; index++) {
297 buffer->char_at_put(index, unicode[index]);
298 }
299 }
300
301 #ifdef ASSERT
302 {
303 ResourceMark rm;
304 size_t utf8_len = static_cast<size_t>(length);
305 char* expected = UNICODE::as_utf8(unicode, utf8_len);
306 char* actual = as_utf8_string(h_obj());
307 if (strcmp(expected, actual) != 0) {
308 fatal("Unicode conversion failure: %s --> %s", expected, actual);
309 }
310 }
311 #endif
312
313 return h_obj;
314 }
315
316 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
317 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
318 return h_obj();
319 }
320
321 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
322 if (utf8_str == nullptr) {
323 return Handle();
324 }
325 bool has_multibyte, is_latin1;
326 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
327 if (!CompactStrings) {
328 has_multibyte = true;
329 is_latin1 = false;
330 }
331
332 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
333 if (length > 0) {
334 if (!has_multibyte) {
335 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
336 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
337 } else if (is_latin1) {
338 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
339 } else {
340 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
341 }
342 }
343
344 #ifdef ASSERT
345 // This check is too strict when the input string is not a valid UTF8.
346 // For example, it may be created with arbitrary content via jni_NewStringUTF.
347 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, strlen(utf8_str), /*version_leq_47*/false)) {
348 ResourceMark rm;
349 const char* expected = utf8_str;
350 char* actual = as_utf8_string(h_obj());
351 if (strcmp(expected, actual) != 0) {
352 fatal("String conversion failure: %s --> %s", expected, actual);
353 }
354 }
355 #endif
356
357 return h_obj;
358 }
359
360 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
361 Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
362 return h_obj();
363 }
364
365 Handle java_lang_String::create_from_symbol(const Symbol* symbol, TRAPS) {
366 const char* utf8_str = (char*)symbol->bytes();
367 int utf8_len = symbol->utf8_length();
368
369 bool has_multibyte, is_latin1;
370 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
371 if (!CompactStrings) {
372 has_multibyte = true;
373 is_latin1 = false;
374 }
375
376 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
377 if (length > 0) {
378 if (!has_multibyte) {
379 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
380 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
381 } else if (is_latin1) {
382 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
383 } else {
384 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
385 }
386 }
387
388 #ifdef ASSERT
389 // This check is too strict on older classfile versions
390 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, utf8_len, /*version_leq_47*/false))
391 {
392 ResourceMark rm;
393 const char* expected = symbol->as_utf8();
394 char* actual = as_utf8_string(h_obj());
395 if (strncmp(expected, actual, utf8_len) != 0) {
396 fatal("Symbol conversion failure: %s --> %s", expected, actual);
397 }
398 }
399 #endif
400
401 return h_obj;
402 }
403
404 // Converts a C string to a Java String based on current encoding
405 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
406 assert(str != nullptr, "bad arguments");
407
408 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
409 static to_java_string_fn_t _to_java_string_fn = nullptr;
410
411 if (_to_java_string_fn == nullptr) {
412 void *lib_handle = os::native_java_library();
413 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
414 if (_to_java_string_fn == nullptr) {
415 fatal("JNU_NewStringPlatform missing");
416 }
417 }
418
419 jstring js = nullptr;
420 {
421 JavaThread* thread = THREAD;
422 HandleMark hm(thread);
423 ThreadToNativeFromVM ttn(thread);
424 js = (_to_java_string_fn)(thread->jni_environment(), str);
425 }
426
427 Handle native_platform_string(THREAD, JNIHandles::resolve(js));
428 JNIHandles::destroy_local(js); // destroy local JNIHandle.
429 return native_platform_string;
430 }
431
432 // Converts a Java String to a native C string that can be used for
433 // native OS calls.
434 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
435 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
436 static to_platform_string_fn_t _to_platform_string_fn = nullptr;
437
438 if (_to_platform_string_fn == nullptr) {
439 void *lib_handle = os::native_java_library();
440 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
441 if (_to_platform_string_fn == nullptr) {
442 fatal("GetStringPlatformChars missing");
443 }
444 }
445
446 char *native_platform_string;
447 jstring js;
448 { JavaThread* thread = THREAD;
449 js = (jstring) JNIHandles::make_local(thread, java_string());
450 HandleMark hm(thread);
451 ThreadToNativeFromVM ttn(thread);
452 JNIEnv *env = thread->jni_environment();
453 bool is_copy;
454 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
455 assert(is_copy == JNI_TRUE, "is_copy value changed");
456 }
457
458 // Uses a store barrier and therefore needs to be in vm state
459 JNIHandles::destroy_local(js);
460
461 return native_platform_string;
462 }
463
464 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
465 ResourceMark rm(THREAD);
466 return create_from_str(java_name->as_klass_external_name(), THREAD);
467 }
468
469 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
470 jchar* result = as_unicode_string_or_null(java_string, length);
471 if (result == nullptr) {
472 THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
473 }
474 return result;
475 }
476
477 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
478 typeArrayOop value = java_lang_String::value(java_string);
479 length = java_lang_String::length(java_string, value);
480 bool is_latin1 = java_lang_String::is_latin1(java_string);
481
482 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
483 if (result != nullptr) {
484 if (!is_latin1) {
485 for (int index = 0; index < length; index++) {
486 result[index] = value->char_at(index);
487 }
488 } else {
489 for (int index = 0; index < length; index++) {
490 result[index] = ((jchar) value->byte_at(index)) & 0xff;
491 }
492 }
493 }
494 return result;
495 }
496
497 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
498 // The hash and hashIsZero fields are subject to a benign data race,
499 // making it crucial to ensure that any observable result of the
500 // calculation in this method stays correct under any possible read of
501 // these fields. Necessary restrictions to allow this to be correct
502 // without explicit memory fences or similar concurrency primitives is
503 // that we can ever only write to one of these two fields for a given
504 // String instance, and that the computation is idempotent and derived
505 // from immutable state
506 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
507 if (java_lang_String::hash_is_set(java_string)) {
508 return java_string->int_field(_hash_offset);
509 }
510
511 typeArrayOop value = java_lang_String::value(java_string);
512 int length = java_lang_String::length(java_string, value);
513 bool is_latin1 = java_lang_String::is_latin1(java_string);
514
515 unsigned int hash = 0;
516 if (length > 0) {
517 if (is_latin1) {
518 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
519 } else {
520 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
521 }
522 }
523
524 if (update) {
525 if (hash != 0) {
526 java_string->int_field_put(_hash_offset, hash);
527 } else {
528 java_string->bool_field_put(_hashIsZero_offset, true);
529 }
530 }
531 return hash;
532 }
533
534 unsigned int java_lang_String::hash_code(oop java_string) {
535 return hash_code_impl(java_string, /*update=*/true);
536 }
537
538 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
539 return hash_code_impl(java_string, /*update=*/false);
540 }
541
542
543 char* java_lang_String::as_quoted_ascii(oop java_string) {
544 typeArrayOop value = java_lang_String::value(java_string);
545 int length = java_lang_String::length(java_string, value);
546 bool is_latin1 = java_lang_String::is_latin1(java_string);
547
548 if (length == 0) return nullptr;
549
550 char* result;
551 size_t result_length;
552 if (!is_latin1) {
553 jchar* base = value->char_at_addr(0);
554 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
555 result = NEW_RESOURCE_ARRAY(char, result_length);
556 UNICODE::as_quoted_ascii(base, length, result, result_length);
557 } else {
558 jbyte* base = value->byte_at_addr(0);
559 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
560 result = NEW_RESOURCE_ARRAY(char, result_length);
561 UNICODE::as_quoted_ascii(base, length, result, result_length);
562 }
563 assert(result_length >= (size_t)length + 1, "must not be shorter");
564 assert(result_length == strlen(result) + 1, "must match");
565 return result;
566 }
567
568 Symbol* java_lang_String::as_symbol(oop java_string) {
569 typeArrayOop value = java_lang_String::value(java_string);
570 int length = java_lang_String::length(java_string, value);
571 bool is_latin1 = java_lang_String::is_latin1(java_string);
572 if (!is_latin1) {
573 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
574 Symbol* sym = SymbolTable::new_symbol(base, length);
575 return sym;
576 } else {
577 ResourceMark rm;
578 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
579 size_t utf8_len = static_cast<size_t>(length);
580 const char* base = UNICODE::as_utf8(position, utf8_len);
581 Symbol* sym = SymbolTable::new_symbol(base, checked_cast<int>(utf8_len));
582 return sym;
583 }
584 }
585
586 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
587 typeArrayOop value = java_lang_String::value(java_string);
588 int length = java_lang_String::length(java_string, value);
589 bool is_latin1 = java_lang_String::is_latin1(java_string);
590 if (!is_latin1) {
591 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
592 return SymbolTable::probe_unicode(base, length);
593 } else {
594 ResourceMark rm;
595 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
596 size_t utf8_len = static_cast<size_t>(length);
597 const char* base = UNICODE::as_utf8(position, utf8_len);
598 return SymbolTable::probe(base, checked_cast<int>(utf8_len));
599 }
600 }
601
602 size_t java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
603 assert(value_equals(value, java_lang_String::value(java_string)),
604 "value must be same as java_lang_String::value(java_string)");
605 int length = java_lang_String::length(java_string, value);
606 if (length == 0) {
607 return 0;
608 }
609 if (!java_lang_String::is_latin1(java_string)) {
610 return UNICODE::utf8_length(value->char_at_addr(0), length);
611 } else {
612 return UNICODE::utf8_length(value->byte_at_addr(0), length);
613 }
614 }
615
616 size_t java_lang_String::utf8_length(oop java_string) {
617 typeArrayOop value = java_lang_String::value(java_string);
618 return utf8_length(java_string, value);
619 }
620
621 int java_lang_String::utf8_length_as_int(oop java_string) {
622 typeArrayOop value = java_lang_String::value(java_string);
623 return utf8_length_as_int(java_string, value);
624 }
625
626 int java_lang_String::utf8_length_as_int(oop java_string, typeArrayOop value) {
627 assert(value_equals(value, java_lang_String::value(java_string)),
628 "value must be same as java_lang_String::value(java_string)");
629 int length = java_lang_String::length(java_string, value);
630 if (length == 0) {
631 return 0;
632 }
633 if (!java_lang_String::is_latin1(java_string)) {
634 return UNICODE::utf8_length_as_int(value->char_at_addr(0), length);
635 } else {
636 return UNICODE::utf8_length_as_int(value->byte_at_addr(0), length);
637 }
638 }
639
640 char* java_lang_String::as_utf8_string(oop java_string) {
641 size_t length;
642 return as_utf8_string(java_string, length);
643 }
644
645 char* java_lang_String::as_utf8_string(oop java_string, size_t& length) {
646 typeArrayOop value = java_lang_String::value(java_string);
647 // `length` is used as the incoming number of characters to
648 // convert, and then set as the number of bytes in the UTF8 sequence.
649 length = java_lang_String::length(java_string, value);
650 bool is_latin1 = java_lang_String::is_latin1(java_string);
651 if (!is_latin1) {
652 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
653 return UNICODE::as_utf8(position, length);
654 } else {
655 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
656 return UNICODE::as_utf8(position, length);
657 }
658 }
659
660 // Uses a provided buffer if it's sufficiently large, otherwise allocates
661 // a resource array to fit
662 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& utf8_len) {
663 typeArrayOop value = java_lang_String::value(java_string);
664 int len = java_lang_String::length(java_string, value);
665 bool is_latin1 = java_lang_String::is_latin1(java_string);
666 if (!is_latin1) {
667 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
668 utf8_len = UNICODE::utf8_length(position, len);
669 if (utf8_len >= buflen) {
670 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
671 }
672 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
673 } else {
674 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
675 utf8_len = UNICODE::utf8_length(position, len);
676 if (utf8_len >= buflen) {
677 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
678 }
679 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
680 }
681 }
682
683 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen) {
684 assert(value_equals(value, java_lang_String::value(java_string)),
685 "value must be same as java_lang_String::value(java_string)");
686 int length = java_lang_String::length(java_string, value);
687 bool is_latin1 = java_lang_String::is_latin1(java_string);
688 if (!is_latin1) {
689 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
690 return UNICODE::as_utf8(position, length, buf, buflen);
691 } else {
692 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
693 return UNICODE::as_utf8(position, length, buf, buflen);
694 }
695 }
696
697 char* java_lang_String::as_utf8_string(oop java_string, char* buf, size_t buflen) {
698 typeArrayOop value = java_lang_String::value(java_string);
699 return as_utf8_string(java_string, value, buf, buflen);
700 }
701
702 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
703 // `length` is used as the incoming number of characters to
704 // convert, and then set as the number of bytes in the UTF8 sequence.
705 size_t length = static_cast<size_t>(len);
706 typeArrayOop value = java_lang_String::value(java_string);
707 bool is_latin1 = java_lang_String::is_latin1(java_string);
708 assert(start + len <= java_lang_String::length(java_string), "just checking");
709 if (!is_latin1) {
710 jchar* position = value->char_at_addr(start);
711 return UNICODE::as_utf8(position, length);
712 } else {
713 jbyte* position = value->byte_at_addr(start);
714 return UNICODE::as_utf8(position, length);
715 }
716 }
717
718 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen) {
719 assert(value_equals(value, java_lang_String::value(java_string)),
720 "value must be same as java_lang_String::value(java_string)");
721 assert(start + len <= java_lang_String::length(java_string), "just checking");
722 bool is_latin1 = java_lang_String::is_latin1(java_string);
723 if (!is_latin1) {
724 jchar* position = value->char_at_addr(start);
725 return UNICODE::as_utf8(position, len, buf, buflen);
726 } else {
727 jbyte* position = value->byte_at_addr(start);
728 return UNICODE::as_utf8(position, len, buf, buflen);
729 }
730 }
731
732 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
733 assert(java_string->klass() == vmClasses::String_klass(),
734 "must be java_string");
735 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
736 int length = java_lang_String::length(java_string, value);
737 if (length != len) {
738 return false;
739 }
740 bool is_latin1 = java_lang_String::is_latin1(java_string);
741 if (!is_latin1) {
742 for (int i = 0; i < len; i++) {
743 if (value->char_at(i) != chars[i]) {
744 return false;
745 }
746 }
747 } else {
748 for (int i = 0; i < len; i++) {
749 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
750 return false;
751 }
752 }
753 }
754 return true;
755 }
756
757 bool java_lang_String::equals(oop java_string, const char* utf8_string, size_t utf8_len) {
758 assert(java_string->klass() == vmClasses::String_klass(),
759 "must be java_string");
760 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
761 int length = java_lang_String::length(java_string, value);
762 int unicode_length = UTF8::unicode_length(utf8_string, utf8_len);
763 if (length != unicode_length) {
764 return false;
765 }
766 bool is_latin1 = java_lang_String::is_latin1(java_string);
767 jchar c;
768 if (!is_latin1) {
769 for (int i = 0; i < unicode_length; i++) {
770 utf8_string = UTF8::next(utf8_string, &c);
771 if (value->char_at(i) != c) {
772 return false;
773 }
774 }
775 } else {
776 for (int i = 0; i < unicode_length; i++) {
777 utf8_string = UTF8::next(utf8_string, &c);
778 if ((((jchar) value->byte_at(i)) & 0xff) != c) {
779 return false;
780 }
781 }
782 }
783 return true;
784 }
785
786 bool java_lang_String::equals(oop str1, oop str2) {
787 assert(str1->klass() == vmClasses::String_klass(),
788 "must be java String");
789 assert(str2->klass() == vmClasses::String_klass(),
790 "must be java String");
791 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
792 bool is_latin1 = java_lang_String::is_latin1(str1);
793 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
794 bool is_latin2 = java_lang_String::is_latin1(str2);
795
796 if (is_latin1 != is_latin2) {
797 // Strings with different coders are never equal.
798 return false;
799 }
800 return value_equals(value1, value2);
801 }
802
803 // Print the given string to the given outputStream, limiting the output to
804 // at most max_length of the string's characters. If the length exceeds the
805 // limit we print an abridged version of the string with the "middle" elided
806 // and replaced by " ... (N characters ommitted) ... ". If max_length is odd
807 // it is treated as max_length-1.
808 void java_lang_String::print(oop java_string, outputStream* st, int max_length) {
809 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
810 // We need at least two characters to print A ... B
811 assert(max_length > 1, "invalid max_length: %d", max_length);
812
813 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
814
815 if (value == nullptr) {
816 // This can happen if, e.g., printing a String
817 // object before its initializer has been called
818 st->print("nullptr");
819 return;
820 }
821
822 int length = java_lang_String::length(java_string, value);
823 bool is_latin1 = java_lang_String::is_latin1(java_string);
824
825 bool abridge = length > max_length;
826
827 st->print("\"");
828 for (int index = 0; index < length; index++) {
829 // If we need to abridge and we've printed half the allowed characters
830 // then jump to the tail of the string.
831 if (abridge && index >= max_length / 2) {
832 st->print(" ... (%d characters ommitted) ... ", length - 2 * (max_length / 2));
833 index = length - (max_length / 2);
834 abridge = false; // only do this once
835 }
836 jchar c = (!is_latin1) ? value->char_at(index) :
837 ((jchar) value->byte_at(index)) & 0xff;
838 if (c < ' ') {
839 st->print("\\x%02X", c); // print control characters e.g. \x0A
840 } else {
841 st->print("%c", c);
842 }
843 }
844 st->print("\"");
845
846 if (length > max_length) {
847 st->print(" (abridged) ");
848 }
849 }
850
851 // java_lang_Class
852
853 int java_lang_Class::_klass_offset;
854 int java_lang_Class::_array_klass_offset;
855 int java_lang_Class::_oop_size_offset;
856 int java_lang_Class::_static_oop_field_count_offset;
857 int java_lang_Class::_class_loader_offset;
858 int java_lang_Class::_module_offset;
859 int java_lang_Class::_protection_domain_offset;
860 int java_lang_Class::_component_mirror_offset;
861 int java_lang_Class::_init_lock_offset;
862 int java_lang_Class::_signers_offset;
863 int java_lang_Class::_name_offset;
864 int java_lang_Class::_source_file_offset;
865 int java_lang_Class::_classData_offset;
866 int java_lang_Class::_classRedefinedCount_offset;
867 int java_lang_Class::_reflectionData_offset;
868 int java_lang_Class::_modifiers_offset;
869 int java_lang_Class::_is_primitive_offset;
870 int java_lang_Class::_raw_access_flags_offset;
871
872 bool java_lang_Class::_offsets_computed = false;
873 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
874 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
875
876 #ifdef ASSERT
877 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
878 assert(fd->has_initial_value(), "caller should have checked this");
879 assert(fd->field_type() == T_OBJECT, "caller should have checked this");
880 assert(fd->signature() == vmSymbols::string_signature(), "just checking");
881 }
882 #endif
883
884 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
885 DEBUG_ONLY(assert_valid_static_string_field(fd);)
886 oop string = fd->string_initial_value(CHECK);
887 mirror()->obj_field_put(fd->offset(), string);
888 }
889
890 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
891 assert(fd->has_initial_value(), "caller should have checked this");
892 BasicType t = fd->field_type();
893 switch (t) {
894 case T_BYTE:
895 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value()));
896 break;
897 case T_BOOLEAN:
898 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value()));
899 break;
900 case T_CHAR:
901 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value()));
902 break;
903 case T_SHORT:
904 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value()));
905 break;
906 case T_INT:
907 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
908 break;
909 case T_FLOAT:
910 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
911 break;
912 case T_DOUBLE:
913 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
914 break;
915 case T_LONG:
916 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
917 break;
918 default:
919 // Illegal ConstantValue attribute in class file should have been
920 // caught during classfile parsing.
921 ShouldNotReachHere();
922 }
923 }
924
925 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
926 assert(mirror.not_null() && fd->is_static(), "just checking");
927 if (fd->has_initial_value()) {
928 if (fd->field_type() != T_OBJECT) {
929 initialize_static_primitive_field(fd, mirror);
930 } else {
931 initialize_static_string_field(fd, mirror, CHECK);
932 }
933 }
934 }
935
936 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
937 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
938
939 // If the offset was read from the shared archive, it was fixed up already
940 if (!k->in_aot_cache()) {
941 if (k->is_instance_klass()) {
942 // During bootstrap, java.lang.Class wasn't loaded so static field
943 // offsets were computed without the size added it. Go back and
944 // update all the static field offsets to included the size.
945
946 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
947 // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
948 // static fields offsets are updated in this array before reencoding everything into
949 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
950
951 int java_fields;
952 int injected_fields;
953 InstanceKlass* ik = InstanceKlass::cast(k);
954 GrowableArray<FieldInfo>* fields =
955 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
956 &java_fields, &injected_fields);
957 for (int i = 0; i < fields->length(); i++) {
958 FieldInfo* fi = fields->adr_at(i);
959 if (fi->access_flags().is_static()) {
960 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
961 }
962 }
963 Array<u1>* old_stream = ik->fieldinfo_stream();
964 assert(fields->length() == (java_fields + injected_fields), "Must be");
965 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
966 ik->set_fieldinfo_stream(new_fis);
967 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
968
969 Array<u1>* old_table = ik->fieldinfo_search_table();
970 Array<u1>* search_table = FieldInfoStream::create_search_table(ik->constants(), new_fis, k->class_loader_data(), CHECK);
971 ik->set_fieldinfo_search_table(search_table);
972 MetadataFactory::free_array<u1>(k->class_loader_data(), old_table);
973
974 DEBUG_ONLY(FieldInfoStream::validate_search_table(ik->constants(), new_fis, search_table));
975 }
976 }
977
978 if (k->in_aot_cache() && k->has_archived_mirror_index()) {
979 if (HeapShared::is_archived_heap_in_use()) {
980 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
981 assert(present, "Missing archived mirror for %s", k->external_name());
982 return;
983 } else {
984 k->clear_java_mirror_handle();
985 k->clear_archived_mirror_index();
986 }
987 }
988 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
989 }
990
991 void java_lang_Class::initialize_mirror_fields(InstanceKlass* ik,
992 Handle mirror,
993 Handle protection_domain,
994 Handle classData,
995 TRAPS) {
996 // Allocate a simple java object for a lock.
997 // This needs to be a java object because during class initialization
998 // it can be held across a java call.
999 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
1000 set_init_lock(mirror(), r);
1001
1002 // Set protection domain also
1003 set_protection_domain(mirror(), protection_domain());
1004
1005 // Initialize static fields
1006 ik->do_local_static_fields(&initialize_static_field, mirror, CHECK);
1007
1008 // Set classData
1009 set_class_data(mirror(), classData());
1010 }
1011
1012 // Set the java.lang.Module module field in the java_lang_Class mirror
1013 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
1014 if (CDSConfig::is_using_aot_linked_classes()) {
1015 oop archived_module = java_lang_Class::module(mirror());
1016 if (archived_module != nullptr) {
1017 precond(module() == nullptr || module() == archived_module);
1018 precond(AOTMetaspace::in_aot_cache_static_region((void*)k));
1019 return;
1020 }
1021 }
1022
1023 if (module.is_null()) {
1024 // During startup, the module may be null only if java.base has not been defined yet.
1025 // Put the class on the fixup_module_list to patch later when the java.lang.Module
1026 // for java.base is known. But note that since we captured the null module another
1027 // thread may have completed that initialization.
1028
1029 // With AOT-linked classes, java.base should have been defined before the
1030 // VM loads any classes.
1031 precond(!CDSConfig::is_using_aot_linked_classes());
1032
1033 bool javabase_was_defined = false;
1034 {
1035 MutexLocker m1(current, Module_lock);
1036 // Keep list of classes needing java.base module fixup
1037 if (!ModuleEntryTable::javabase_defined()) {
1038 assert(k->java_mirror() != nullptr, "Class's mirror is null");
1039 k->class_loader_data()->inc_keep_alive_ref_count();
1040 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
1041 fixup_module_field_list()->push(k);
1042 } else {
1043 javabase_was_defined = true;
1044 }
1045 }
1046
1047 // If java.base was already defined then patch this particular class with java.base.
1048 if (javabase_was_defined) {
1049 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
1050 assert(javabase_entry != nullptr && javabase_entry->module_oop() != nullptr,
1051 "Setting class module field, " JAVA_BASE_NAME " should be defined");
1052 Handle javabase_handle(current, javabase_entry->module_oop());
1053 set_module(mirror(), javabase_handle());
1054 }
1055 } else {
1056 assert(Universe::is_module_initialized() ||
1057 (ModuleEntryTable::javabase_defined() &&
1058 (module() == ModuleEntryTable::javabase_moduleEntry()->module_oop())),
1059 "Incorrect java.lang.Module specification while creating mirror");
1060 set_module(mirror(), module());
1061 }
1062 }
1063
1064 // Statically allocate fixup lists because they always get created.
1065 void java_lang_Class::allocate_fixup_lists() {
1066 if (!CDSConfig::is_using_aot_linked_classes()) {
1067 // fixup_mirror_list() is not used when we have preloaded classes. See
1068 // Universe::fixup_mirrors().
1069 GrowableArray<Klass*>* mirror_list =
1070 new (mtClass) GrowableArray<Klass*>(40, mtClass);
1071 set_fixup_mirror_list(mirror_list);
1072
1073 // With AOT-linked classes, java.base module is defined before any class
1074 // is loaded, so there's no need for fixup_module_field_list().
1075 GrowableArray<Klass*>* module_list =
1076 new (mtModule) GrowableArray<Klass*>(500, mtModule);
1077 set_fixup_module_field_list(module_list);
1078 }
1079 }
1080
1081 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
1082 Handle& mirror, Handle& comp_mirror, TRAPS) {
1083 // Allocate mirror (java.lang.Class instance)
1084 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
1085 mirror = Handle(THREAD, mirror_oop);
1086
1087 // Setup indirection from mirror->klass
1088 set_klass(mirror(), k);
1089
1090 // Set the modifiers flag.
1091 u2 computed_modifiers = k->compute_modifier_flags();
1092 set_modifiers(mirror(), computed_modifiers);
1093 // Set the raw access_flags, this is used by reflection instead of modifier flags.
1094 // The Java code for array classes gets the access flags from the element type.
1095 assert(!k->is_array_klass() || k->access_flags().as_unsigned_short() == 0, "access flags are not set for arrays");
1096 set_raw_access_flags(mirror(), k->access_flags().as_unsigned_short());
1097
1098 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
1099 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
1100
1101 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
1102
1103 // It might also have a component mirror. This mirror must already exist.
1104 if (k->is_array_klass()) {
1105 if (k->is_typeArray_klass()) {
1106 BasicType type = TypeArrayKlass::cast(k)->element_type();
1107 if (is_scratch) {
1108 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
1109 } else {
1110 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
1111 }
1112 } else {
1113 assert(k->is_objArray_klass(), "Must be");
1114 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1115 assert(element_klass != nullptr, "Must have an element klass");
1116 if (is_scratch) {
1117 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1118 } else {
1119 comp_mirror = Handle(THREAD, element_klass->java_mirror());
1120 }
1121 }
1122 assert(comp_mirror() != nullptr, "must have a mirror");
1123
1124 // Two-way link between the array klass and its component mirror:
1125 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1126 set_component_mirror(mirror(), comp_mirror());
1127 // See below for ordering dependencies between field array_klass in component mirror
1128 // and java_mirror in this klass.
1129 } else {
1130 assert(k->is_instance_klass(), "Must be");
1131 initialize_mirror_fields(InstanceKlass::cast(k), mirror, protection_domain, classData, THREAD);
1132 if (HAS_PENDING_EXCEPTION) {
1133 // If any of the fields throws an exception like OOM remove the klass field
1134 // from the mirror so GC doesn't follow it after the klass has been deallocated.
1135 // This mirror looks like a primitive type, which logically it is because it
1136 // it represents no class.
1137 set_klass(mirror(), nullptr);
1138 return;
1139 }
1140 }
1141 }
1142
1143 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1144 Handle module, Handle protection_domain,
1145 Handle classData, TRAPS) {
1146 assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1147 assert(k->java_mirror() == nullptr, "should only assign mirror once");
1148
1149 // Class_klass has to be loaded because it is used to allocate
1150 // the mirror.
1151 if (vmClasses::Class_klass_is_loaded()) {
1152 Handle mirror;
1153 Handle comp_mirror;
1154
1155 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1156
1157 // set the classLoader field in the java_lang_Class instance
1158 assert(class_loader() == k->class_loader(), "should be same");
1159 set_class_loader(mirror(), class_loader());
1160
1161 // Setup indirection from klass->mirror
1162 // after any exceptions can happen during allocations.
1163 k->set_java_mirror(mirror);
1164
1165 // Set the module field in the java_lang_Class instance. This must be done
1166 // after the mirror is set.
1167 set_mirror_module_field(THREAD, k, mirror, module);
1168
1169 if (comp_mirror() != nullptr) {
1170 // Set after k->java_mirror() is published, because compiled code running
1171 // concurrently doesn't expect a k to have a null java_mirror.
1172 release_set_array_klass(comp_mirror(), k);
1173 }
1174 if (CDSConfig::is_dumping_heap()) {
1175 create_scratch_mirror(k, CHECK);
1176 }
1177 } else {
1178 assert(!CDSConfig::is_using_aot_linked_classes(), "should not come here");
1179 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1180 fixup_mirror_list()->push(k);
1181 }
1182 }
1183
1184 #if INCLUDE_CDS_JAVA_HEAP
1185 // The "scratch mirror" stores the states of the mirror object that can be
1186 // decided at dump time (such as the initial values of the static fields, the
1187 // component mirror, etc). At runtime, more information is added to it by
1188 // java_lang_Class::restore_archived_mirror().
1189 //
1190 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1191 // produces the same result as /*runtime*/create_mirror().
1192 //
1193 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1194 // latter may contain dumptime-specific information that cannot be archived
1195 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1196 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1197 if (k->class_loader() != nullptr &&
1198 k->class_loader() != SystemDictionary::java_platform_loader() &&
1199 k->class_loader() != SystemDictionary::java_system_loader()) {
1200 // We only archive the mirrors of classes loaded by the built-in loaders
1201 return;
1202 }
1203
1204 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1205 Handle mirror;
1206 Handle comp_mirror;
1207 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1208
1209 if (comp_mirror() != nullptr) {
1210 release_set_array_klass(comp_mirror(), k);
1211 }
1212
1213 HeapShared::set_scratch_java_mirror(k, mirror());
1214 }
1215
1216 // Returns true if the mirror is updated, false if no archived mirror
1217 // data is present. After the archived mirror object is restored, the
1218 // shared klass' _has_raw_archived_mirror flag is cleared.
1219 bool java_lang_Class::restore_archived_mirror(Klass *k,
1220 Handle class_loader, Handle module,
1221 Handle protection_domain, TRAPS) {
1222 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1223 // see more details in vmClasses::resolve_all().
1224 if (!vmClasses::Class_klass_is_loaded() && !CDSConfig::is_using_aot_linked_classes()) {
1225 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1226 fixup_mirror_list()->push(k);
1227 return true;
1228 }
1229
1230 oop m = k->archived_java_mirror();
1231 assert(m != nullptr, "must have stored non-null archived mirror");
1232
1233 // Sanity: clear it now to prevent re-initialization if any of the following fails
1234 k->clear_archived_mirror_index();
1235
1236 // mirror is archived, restore
1237 log_debug(aot, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1238 assert(as_Klass(m) == k, "must be");
1239 Handle mirror(THREAD, m);
1240
1241 if (!k->is_array_klass()) {
1242 // - local static final fields with initial values were initialized at dump time
1243 assert(init_lock(mirror()) != nullptr, "allocated during AOT assembly");
1244
1245 if (protection_domain.not_null()) {
1246 set_protection_domain(mirror(), protection_domain());
1247 }
1248 }
1249
1250 assert(class_loader() == k->class_loader(), "should be same");
1251 if (class_loader.not_null()) {
1252 set_class_loader(mirror(), class_loader());
1253 }
1254
1255 k->set_java_mirror(mirror);
1256
1257 set_mirror_module_field(THREAD, k, mirror, module);
1258
1259 if (log_is_enabled(Trace, aot, heap, mirror)) {
1260 ResourceMark rm(THREAD);
1261 log_trace(aot, heap, mirror)(
1262 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1263 }
1264
1265 return true;
1266 }
1267 #endif // INCLUDE_CDS_JAVA_HEAP
1268
1269 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1270 assert(_module_offset != 0, "must have been computed already");
1271 set_module(k->java_mirror(), module());
1272 }
1273
1274 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1275 assert(_oop_size_offset != 0, "must be set");
1276 assert(size > 0, "Oop size must be greater than zero, not %zu", size);
1277 assert(size <= INT_MAX, "Lossy conversion: %zu", size);
1278 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1279 }
1280
1281 int java_lang_Class::static_oop_field_count(oop java_class) {
1282 assert(_static_oop_field_count_offset != 0, "must be set");
1283 return java_class->int_field(_static_oop_field_count_offset);
1284 }
1285
1286 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1287 assert(_static_oop_field_count_offset != 0, "must be set");
1288 java_class->int_field_put(_static_oop_field_count_offset, size);
1289 }
1290
1291 oop java_lang_Class::protection_domain(oop java_class) {
1292 assert(_protection_domain_offset != 0, "must be set");
1293 return java_class->obj_field(_protection_domain_offset);
1294 }
1295 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1296 assert(_protection_domain_offset != 0, "must be set");
1297 java_class->obj_field_put(_protection_domain_offset, pd);
1298 }
1299
1300 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1301 assert(_component_mirror_offset != 0, "must be set");
1302 assert(java_lang_Class::as_Klass(java_class) != nullptr &&
1303 java_lang_Class::as_Klass(java_class)->is_array_klass(), "must be");
1304 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1305 }
1306
1307 oop java_lang_Class::component_mirror(oop java_class) {
1308 assert(_component_mirror_offset != 0, "must be set");
1309 return java_class->obj_field(_component_mirror_offset);
1310 }
1311
1312 oop java_lang_Class::init_lock(oop java_class) {
1313 assert(_init_lock_offset != 0, "must be set");
1314 return java_class->obj_field(_init_lock_offset);
1315 }
1316 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1317 assert(_init_lock_offset != 0, "must be set");
1318 java_class->obj_field_put(_init_lock_offset, init_lock);
1319 }
1320
1321 objArrayOop java_lang_Class::signers(oop java_class) {
1322 assert(_signers_offset != 0, "must be set");
1323 return (objArrayOop)java_class->obj_field(_signers_offset);
1324 }
1325
1326 oop java_lang_Class::class_data(oop java_class) {
1327 assert(_classData_offset != 0, "must be set");
1328 return java_class->obj_field(_classData_offset);
1329 }
1330 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1331 assert(_classData_offset != 0, "must be set");
1332 java_class->obj_field_put(_classData_offset, class_data);
1333 }
1334
1335 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1336 assert(_class_loader_offset != 0, "offsets should have been initialized");
1337 java_class->obj_field_put(_class_loader_offset, loader);
1338 }
1339
1340 oop java_lang_Class::class_loader(oop java_class) {
1341 assert(_class_loader_offset != 0, "must be set");
1342 return java_class->obj_field(_class_loader_offset);
1343 }
1344
1345 oop java_lang_Class::module(oop java_class) {
1346 assert(_module_offset != 0, "must be set");
1347 return java_class->obj_field(_module_offset);
1348 }
1349
1350 void java_lang_Class::set_module(oop java_class, oop module) {
1351 assert(_module_offset != 0, "must be set");
1352 java_class->obj_field_put(_module_offset, module);
1353 }
1354
1355 oop java_lang_Class::name(Handle java_class, TRAPS) {
1356 assert(_name_offset != 0, "must be set");
1357 oop o = java_class->obj_field(_name_offset);
1358 if (o == nullptr) {
1359 o = StringTable::intern(as_external_name(java_class()), THREAD);
1360 java_class->obj_field_put(_name_offset, o);
1361 }
1362 return o;
1363 }
1364
1365 oop java_lang_Class::source_file(oop java_class) {
1366 assert(_source_file_offset != 0, "must be set");
1367 return java_class->obj_field(_source_file_offset);
1368 }
1369
1370 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1371 assert(_source_file_offset != 0, "must be set");
1372 java_class->obj_field_put(_source_file_offset, source_file);
1373 }
1374
1375 void java_lang_Class::set_is_primitive(oop java_class) {
1376 assert(_is_primitive_offset != 0, "must be set");
1377 java_class->bool_field_put(_is_primitive_offset, true);
1378 }
1379
1380
1381 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1382 // Mirrors for basic types have a null klass field, which makes them special.
1383 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1384 if (type != T_VOID) {
1385 Klass* aklass = Universe::typeArrayKlass(type);
1386 assert(aklass != nullptr, "correct bootstrap");
1387 release_set_array_klass(java_class, aklass);
1388 }
1389 #ifdef ASSERT
1390 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1391 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1392 #endif
1393 set_modifiers(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
1394 set_raw_access_flags(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
1395
1396 set_is_primitive(java_class);
1397 return java_class;
1398 }
1399
1400 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1401 assert(is_instance(java_class), "must be a Class object");
1402 java_class->metadata_field_put(_klass_offset, klass);
1403 }
1404
1405
1406 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1407 assert(is_instance(java_class), "must be a Class object");
1408 Symbol* name = nullptr;
1409 bool is_instance = false;
1410 if (is_primitive(java_class)) {
1411 name = vmSymbols::type_signature(primitive_type(java_class));
1412 } else {
1413 Klass* k = as_Klass(java_class);
1414 is_instance = k->is_instance_klass();
1415 name = k->name();
1416 }
1417 if (name == nullptr) {
1418 st->print("<null>");
1419 return;
1420 }
1421 if (is_instance) st->print("L");
1422 st->write((char*) name->base(), (int) name->utf8_length());
1423 if (is_instance) st->print(";");
1424 }
1425
1426 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1427 assert(is_instance(java_class), "must be a Class object");
1428 Symbol* name;
1429 if (is_primitive(java_class)) {
1430 name = vmSymbols::type_signature(primitive_type(java_class));
1431 // Because this can create a new symbol, the caller has to decrement
1432 // the refcount, so make adjustment here and below for symbols returned
1433 // that are not created or incremented due to a successful lookup.
1434 name->increment_refcount();
1435 } else {
1436 Klass* k = as_Klass(java_class);
1437 if (!k->is_instance_klass()) {
1438 name = k->name();
1439 name->increment_refcount();
1440 } else {
1441 ResourceMark rm;
1442 const char* sigstr = k->signature_name();
1443 int siglen = (int) strlen(sigstr);
1444 if (!intern_if_not_found) {
1445 name = SymbolTable::probe(sigstr, siglen);
1446 } else {
1447 name = SymbolTable::new_symbol(sigstr, siglen);
1448 }
1449 }
1450 }
1451 return name;
1452 }
1453
1454 // Returns the Java name for this Java mirror (Resource allocated)
1455 // See Klass::external_name().
1456 // For primitive type Java mirrors, its type name is returned.
1457 const char* java_lang_Class::as_external_name(oop java_class) {
1458 assert(is_instance(java_class), "must be a Class object");
1459 const char* name = nullptr;
1460 if (is_primitive(java_class)) {
1461 name = type2name(primitive_type(java_class));
1462 } else {
1463 name = as_Klass(java_class)->external_name();
1464 }
1465 if (name == nullptr) {
1466 name = "<null>";
1467 }
1468 return name;
1469 }
1470
1471 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1472 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1473 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass");
1474 return k;
1475 }
1476
1477 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1478 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1479 java_class->release_metadata_field_put(_array_klass_offset, klass);
1480 }
1481
1482
1483 BasicType java_lang_Class::primitive_type(oop java_class) {
1484 assert(is_primitive(java_class), "just checking");
1485 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1486 BasicType type = T_VOID;
1487 if (ak != nullptr) {
1488 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1489 type = ArrayKlass::cast(ak)->element_type();
1490 } else {
1491 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1492 }
1493 #ifdef ASSERT
1494 if (CDSConfig::is_dumping_heap()) {
1495 oop mirror = Universe::java_mirror(type);
1496 oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1497 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1498 } else {
1499 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1500 }
1501 #endif
1502 return type;
1503 }
1504
1505 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1506 assert(is_instance(java_class), "must be a Class object");
1507 if (is_primitive(java_class)) {
1508 if (reference_klass != nullptr)
1509 (*reference_klass) = nullptr;
1510 return primitive_type(java_class);
1511 } else {
1512 if (reference_klass != nullptr)
1513 (*reference_klass) = as_Klass(java_class);
1514 return T_OBJECT;
1515 }
1516 }
1517
1518
1519 oop java_lang_Class::primitive_mirror(BasicType t) {
1520 oop mirror = Universe::java_mirror(t);
1521 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1522 assert(is_primitive(mirror), "must be primitive");
1523 return mirror;
1524 }
1525
1526 #define CLASS_FIELDS_DO(macro) \
1527 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1528 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1529 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1530 macro(_module_offset, k, "module", module_signature, false); \
1531 macro(_name_offset, k, "name", string_signature, false); \
1532 macro(_classData_offset, k, "classData", object_signature, false); \
1533 macro(_reflectionData_offset, k, "reflectionData", java_lang_ref_SoftReference_signature, false); \
1534 macro(_signers_offset, k, "signers", object_array_signature, false); \
1535 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), char_signature, false); \
1536 macro(_raw_access_flags_offset, k, "classFileAccessFlags", char_signature, false); \
1537 macro(_protection_domain_offset, k, "protectionDomain", java_security_ProtectionDomain_signature, false); \
1538 macro(_is_primitive_offset, k, "primitive", bool_signature, false);
1539
1540 void java_lang_Class::compute_offsets() {
1541 if (_offsets_computed) {
1542 return;
1543 }
1544
1545 _offsets_computed = true;
1546
1547 InstanceKlass* k = vmClasses::Class_klass();
1548 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1549 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1550 }
1551
1552 #if INCLUDE_CDS
1553 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1554 f->do_bool(&_offsets_computed);
1555
1556 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1557
1558 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1559 }
1560 #endif
1561
1562 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1563 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1564 return the_class_mirror->int_field(_classRedefinedCount_offset);
1565 }
1566
1567 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1568 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1569 the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1570 }
1571
1572 int java_lang_Class::modifiers(oop the_class_mirror) {
1573 assert(_modifiers_offset != 0, "offsets should have been initialized");
1574 return the_class_mirror->char_field(_modifiers_offset);
1575 }
1576
1577 void java_lang_Class::set_modifiers(oop the_class_mirror, u2 value) {
1578 assert(_modifiers_offset != 0, "offsets should have been initialized");
1579 the_class_mirror->char_field_put(_modifiers_offset, value);
1580 }
1581
1582 void java_lang_Class::set_raw_access_flags(oop the_class_mirror, u2 value) {
1583 assert(_raw_access_flags_offset != 0, "offsets should have been initialized");
1584 the_class_mirror->char_field_put(_raw_access_flags_offset, value);
1585 }
1586
1587
1588 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1589 // platform thread structure, and a eetop offset which was used for thread
1590 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1591 // merged, so in the HotSpot VM we just use the eetop field for the thread
1592 // instead of the privateInfo_offset.
1593 //
1594 // Note: The stackSize field is only present starting in 1.4.
1595
1596 int java_lang_Thread_FieldHolder::_group_offset;
1597 int java_lang_Thread_FieldHolder::_priority_offset;
1598 int java_lang_Thread_FieldHolder::_stackSize_offset;
1599 int java_lang_Thread_FieldHolder::_daemon_offset;
1600 int java_lang_Thread_FieldHolder::_thread_status_offset;
1601
1602 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1603 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1604 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1605 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1606 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1607 macro(_thread_status_offset, k, "threadStatus", int_signature, false)
1608
1609 void java_lang_Thread_FieldHolder::compute_offsets() {
1610 assert(_group_offset == 0, "offsets should be initialized only once");
1611
1612 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1613 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1614 }
1615
1616 #if INCLUDE_CDS
1617 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1618 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1619 }
1620 #endif
1621
1622 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1623 return holder->obj_field(_group_offset);
1624 }
1625
1626 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1627 return (ThreadPriority)holder->int_field(_priority_offset);
1628 }
1629
1630 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1631 holder->int_field_put(_priority_offset, priority);
1632 }
1633
1634 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1635 return holder->long_field(_stackSize_offset);
1636 }
1637
1638 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1639 return holder->bool_field(_daemon_offset) != 0;
1640 }
1641
1642 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1643 assert(val, "daemon status is never turned off");
1644 holder->bool_field_put(_daemon_offset, val);
1645 }
1646
1647 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1648 holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1649 }
1650
1651 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1652 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1653 }
1654
1655
1656 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1657
1658 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1659 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true);
1660
1661 void java_lang_Thread_Constants::compute_offsets() {
1662 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1663
1664 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1665 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1666 }
1667
1668 #if INCLUDE_CDS
1669 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1670 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1671 }
1672 #endif
1673
1674 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1675 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1676 oop base = k->static_field_base_raw();
1677 return base->obj_field(_static_VTHREAD_GROUP_offset);
1678 }
1679
1680
1681 int java_lang_Thread::_holder_offset;
1682 int java_lang_Thread::_name_offset;
1683 int java_lang_Thread::_contextClassLoader_offset;
1684 int java_lang_Thread::_eetop_offset;
1685 int java_lang_Thread::_jvmti_thread_state_offset;
1686 int java_lang_Thread::_vthread_transition_disable_count_offset;
1687 int java_lang_Thread::_is_in_vthread_transition_offset;
1688 int java_lang_Thread::_interrupted_offset;
1689 int java_lang_Thread::_interruptLock_offset;
1690 int java_lang_Thread::_tid_offset;
1691 int java_lang_Thread::_continuation_offset;
1692 int java_lang_Thread::_park_blocker_offset;
1693 int java_lang_Thread::_scopedValueBindings_offset;
1694 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1695
1696 #define THREAD_FIELDS_DO(macro) \
1697 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \
1698 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1699 macro(_contextClassLoader_offset, k, "contextClassLoader", classloader_signature, false); \
1700 macro(_eetop_offset, k, "eetop", long_signature, false); \
1701 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1702 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \
1703 macro(_tid_offset, k, "tid", long_signature, false); \
1704 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1705 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1706 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1707
1708 void java_lang_Thread::compute_offsets() {
1709 assert(_holder_offset == 0, "offsets should be initialized only once");
1710
1711 InstanceKlass* k = vmClasses::Thread_klass();
1712 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1713 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1714 }
1715
1716 #if INCLUDE_CDS
1717 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1718 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1719 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1720 }
1721 #endif
1722
1723 JavaThread* java_lang_Thread::thread(oop java_thread) {
1724 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1725 }
1726
1727 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1728 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1729 }
1730
1731 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1732 java_thread->address_field_put(_eetop_offset, (address)thread);
1733 }
1734
1735 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1736 java_thread->release_address_field_put(_eetop_offset, (address)thread);
1737 }
1738
1739 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1740 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1741 }
1742
1743 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1744 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1745 }
1746
1747 int java_lang_Thread::vthread_transition_disable_count(oop java_thread) {
1748 jint* addr = java_thread->field_addr<jint>(_vthread_transition_disable_count_offset);
1749 return AtomicAccess::load(addr);
1750 }
1751
1752 void java_lang_Thread::inc_vthread_transition_disable_count(oop java_thread) {
1753 assert(VThreadTransition_lock->owned_by_self(), "Must be locked");
1754 jint* addr = java_thread->field_addr<jint>(_vthread_transition_disable_count_offset);
1755 int val = AtomicAccess::load(addr);
1756 AtomicAccess::store(addr, val + 1);
1757 }
1758
1759 void java_lang_Thread::dec_vthread_transition_disable_count(oop java_thread) {
1760 assert(VThreadTransition_lock->owned_by_self(), "Must be locked");
1761 jint* addr = java_thread->field_addr<jint>(_vthread_transition_disable_count_offset);
1762 int val = AtomicAccess::load(addr);
1763 AtomicAccess::store(addr, val - 1);
1764 }
1765
1766 bool java_lang_Thread::is_in_vthread_transition(oop java_thread) {
1767 jboolean* addr = java_thread->field_addr<jboolean>(_is_in_vthread_transition_offset);
1768 return AtomicAccess::load(addr);
1769 }
1770
1771 void java_lang_Thread::set_is_in_vthread_transition(oop java_thread, bool val) {
1772 assert(is_in_vthread_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside");
1773 jboolean* addr = java_thread->field_addr<jboolean>(_is_in_vthread_transition_offset);
1774 AtomicAccess::store(addr, (jboolean)val);
1775 }
1776
1777 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1778 assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1779 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1780 }
1781
1782 oop java_lang_Thread::holder(oop java_thread) {
1783 // Note: may return null if the thread is still attaching
1784 return java_thread->obj_field(_holder_offset);
1785 }
1786 oop java_lang_Thread::interrupt_lock(oop java_thread) {
1787 return java_thread->obj_field(_interruptLock_offset);
1788 }
1789
1790 bool java_lang_Thread::interrupted(oop java_thread) {
1791 // Make sure the caller can safely access oops.
1792 assert(Thread::current()->is_VM_thread() ||
1793 (JavaThread::current()->thread_state() != _thread_blocked &&
1794 JavaThread::current()->thread_state() != _thread_in_native),
1795 "Unsafe access to oop");
1796 return java_thread->bool_field_volatile(_interrupted_offset);
1797 }
1798
1799 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1800 // Make sure the caller can safely access oops.
1801 assert(Thread::current()->is_VM_thread() ||
1802 (JavaThread::current()->thread_state() != _thread_blocked &&
1803 JavaThread::current()->thread_state() != _thread_in_native),
1804 "Unsafe access to oop");
1805 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1806 }
1807
1808
1809 oop java_lang_Thread::name(oop java_thread) {
1810 return java_thread->obj_field(_name_offset);
1811 }
1812
1813
1814 void java_lang_Thread::set_name(oop java_thread, oop name) {
1815 java_thread->obj_field_put(_name_offset, name);
1816 }
1817
1818 // Convenience macros for setting and getting Thread fields that
1819 // are actually stored in the FieldHolder object of the thread.
1820 // The FieldHolder can be null whilst a thread is attaching via
1821 // JNI, and when the main thread is attaching.
1822
1823 // The default value should be the default/zero initialized value
1824 // of the field as it would be in java.lang.Thread.FieldHolder.
1825 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \
1826 { \
1827 oop holder = java_lang_Thread::holder(java_thread); \
1828 if (holder != nullptr) \
1829 return java_lang_Thread_FieldHolder::field(holder); \
1830 else \
1831 return default_val; \
1832 }
1833
1834 // We should never be trying to set a field of an attaching thread.
1835 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \
1836 { \
1837 oop holder = java_lang_Thread::holder(java_thread); \
1838 assert(holder != nullptr, "Thread not fully initialized"); \
1839 java_lang_Thread_FieldHolder::set_##field(holder, value); \
1840 }
1841
1842
1843 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1844 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1845 }
1846
1847
1848 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1849 SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1850 }
1851
1852
1853 oop java_lang_Thread::threadGroup(oop java_thread) {
1854 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1855 }
1856
1857
1858 bool java_lang_Thread::is_alive(oop java_thread) {
1859 JavaThread* thr = java_lang_Thread::thread(java_thread);
1860 return (thr != nullptr);
1861 }
1862
1863
1864 bool java_lang_Thread::is_daemon(oop java_thread) {
1865 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1866 }
1867
1868
1869 void java_lang_Thread::set_daemon(oop java_thread) {
1870 SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1871 }
1872
1873 oop java_lang_Thread::context_class_loader(oop java_thread) {
1874 return java_thread->obj_field(_contextClassLoader_offset);
1875 }
1876
1877
1878 jlong java_lang_Thread::stackSize(oop java_thread) {
1879 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1880 }
1881
1882 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1883 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1884 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1885 }
1886
1887 // Read thread status value from threadStatus field in java.lang.Thread java class.
1888 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1889 // Make sure the caller is operating on behalf of the VM or is
1890 // running VM code (state == _thread_in_vm).
1891 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1892 JavaThread::current()->thread_state() == _thread_in_vm ||
1893 JavaThread::current() == java_lang_Thread::thread(java_thread),
1894 "unsafe call to java_lang_Thread::get_thread_status()?");
1895 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1896 }
1897
1898 ByteSize java_lang_Thread::thread_id_offset() {
1899 return in_ByteSize(_tid_offset);
1900 }
1901
1902 oop java_lang_Thread::park_blocker(oop java_thread) {
1903 return java_thread->obj_field_access<MO_RELAXED>(_park_blocker_offset);
1904 }
1905
1906 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1907 JavaThreadStatus status = get_thread_status(java_thread);
1908 switch (status) {
1909 case JavaThreadStatus::NEW : return "NEW";
1910 case JavaThreadStatus::RUNNABLE : return "RUNNABLE";
1911 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)";
1912 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1913 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1914 case JavaThreadStatus::PARKED : return "WAITING (parking)";
1915 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)";
1916 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1917 case JavaThreadStatus::TERMINATED : return "TERMINATED";
1918 default : return "UNKNOWN";
1919 };
1920 }
1921 int java_lang_ThreadGroup::_parent_offset;
1922 int java_lang_ThreadGroup::_name_offset;
1923 int java_lang_ThreadGroup::_maxPriority_offset;
1924 int java_lang_ThreadGroup::_daemon_offset;
1925
1926 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1927 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1928 return java_thread_group->obj_field(_parent_offset);
1929 }
1930
1931 // ("name as oop" accessor is not necessary)
1932
1933 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1934 oop name = java_thread_group->obj_field(_name_offset);
1935 // ThreadGroup.name can be null
1936 if (name != nullptr) {
1937 return java_lang_String::as_utf8_string(name);
1938 }
1939 return nullptr;
1940 }
1941
1942 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1943 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1944 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1945 }
1946
1947 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1948 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1949 return java_thread_group->bool_field(_daemon_offset) != 0;
1950 }
1951
1952 #define THREADGROUP_FIELDS_DO(macro) \
1953 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1954 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1955 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1956 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false);
1957
1958 void java_lang_ThreadGroup::compute_offsets() {
1959 assert(_parent_offset == 0, "offsets should be initialized only once");
1960
1961 InstanceKlass* k = vmClasses::ThreadGroup_klass();
1962 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1963 }
1964
1965 #if INCLUDE_CDS
1966 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1967 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1968 }
1969 #endif
1970
1971
1972 // java_lang_VirtualThread
1973
1974 int java_lang_VirtualThread::static_vthread_scope_offset;
1975 int java_lang_VirtualThread::_carrierThread_offset;
1976 int java_lang_VirtualThread::_continuation_offset;
1977 int java_lang_VirtualThread::_state_offset;
1978 int java_lang_VirtualThread::_next_offset;
1979 int java_lang_VirtualThread::_onWaitingList_offset;
1980 int java_lang_VirtualThread::_notified_offset;
1981 int java_lang_VirtualThread::_interruptible_wait_offset;
1982 int java_lang_VirtualThread::_timeout_offset;
1983 int java_lang_VirtualThread::_objectWaiter_offset;
1984
1985 #define VTHREAD_FIELDS_DO(macro) \
1986 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \
1987 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \
1988 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1989 macro(_state_offset, k, "state", int_signature, false); \
1990 macro(_next_offset, k, "next", vthread_signature, false); \
1991 macro(_onWaitingList_offset, k, "onWaitingList", bool_signature, false); \
1992 macro(_notified_offset, k, "notified", bool_signature, false); \
1993 macro(_interruptible_wait_offset, k, "interruptibleWait", bool_signature, false); \
1994 macro(_timeout_offset, k, "timeout", long_signature, false);
1995
1996
1997 void java_lang_VirtualThread::compute_offsets() {
1998 InstanceKlass* k = vmClasses::VirtualThread_klass();
1999 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2000 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2001 }
2002
2003 bool java_lang_VirtualThread::is_instance(oop obj) {
2004 return obj != nullptr && is_subclass(obj->klass());
2005 }
2006
2007 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
2008 oop thread = vthread->obj_field(_carrierThread_offset);
2009 return thread;
2010 }
2011
2012 oop java_lang_VirtualThread::continuation(oop vthread) {
2013 oop cont = vthread->obj_field(_continuation_offset);
2014 return cont;
2015 }
2016
2017 int java_lang_VirtualThread::state(oop vthread) {
2018 return vthread->int_field_acquire(_state_offset);
2019 }
2020
2021 void java_lang_VirtualThread::set_state(oop vthread, int state) {
2022 vthread->release_int_field_put(_state_offset, state);
2023 }
2024
2025 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) {
2026 jint* addr = vthread->field_addr<jint>(_state_offset);
2027 int res = AtomicAccess::cmpxchg(addr, old_state, new_state);
2028 return res;
2029 }
2030
2031 oop java_lang_VirtualThread::next(oop vthread) {
2032 return vthread->obj_field(_next_offset);
2033 }
2034
2035 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) {
2036 vthread->obj_field_put(_next_offset, next_vthread);
2037 }
2038
2039 // Add vthread to the waiting list if it's not already in it. Multiple threads
2040 // could be trying to add vthread to the list at the same time, so we control
2041 // access with a cmpxchg on onWaitingList. The winner adds vthread to the list.
2042 // Method returns true if we added vthread to the list, false otherwise.
2043 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) {
2044 jboolean* addr = vthread->field_addr<jboolean>(_onWaitingList_offset);
2045 jboolean vthread_on_list = AtomicAccess::load(addr);
2046 if (!vthread_on_list) {
2047 vthread_on_list = AtomicAccess::cmpxchg(addr, (jboolean)JNI_FALSE, (jboolean)JNI_TRUE);
2048 if (!vthread_on_list) {
2049 for (;;) {
2050 oop head = list_head.resolve();
2051 java_lang_VirtualThread::set_next(vthread, head);
2052 if (list_head.cmpxchg(head, vthread) == head) return true;
2053 }
2054 }
2055 }
2056 return false; // already on waiting list
2057 }
2058
2059 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) {
2060 vthread->bool_field_put_volatile(_notified_offset, value);
2061 }
2062
2063 void java_lang_VirtualThread::set_interruptible_wait(oop vthread, jboolean value) {
2064 vthread->bool_field_put_volatile(_interruptible_wait_offset, value);
2065 }
2066
2067 jlong java_lang_VirtualThread::timeout(oop vthread) {
2068 return vthread->long_field(_timeout_offset);
2069 }
2070
2071 void java_lang_VirtualThread::set_timeout(oop vthread, jlong value) {
2072 vthread->long_field_put(_timeout_offset, value);
2073 }
2074
2075 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2076 JavaThreadStatus status = JavaThreadStatus::NEW;
2077 switch (state & ~SUSPENDED) {
2078 case NEW:
2079 status = JavaThreadStatus::NEW;
2080 break;
2081 case STARTED:
2082 case RUNNING:
2083 case PARKING:
2084 case TIMED_PARKING:
2085 case UNPARKED:
2086 case YIELDING:
2087 case YIELDED:
2088 case UNBLOCKED:
2089 case WAITING:
2090 case TIMED_WAITING:
2091 status = JavaThreadStatus::RUNNABLE;
2092 break;
2093 case PARKED:
2094 case PINNED:
2095 status = JavaThreadStatus::PARKED;
2096 break;
2097 case TIMED_PARKED:
2098 case TIMED_PINNED:
2099 status = JavaThreadStatus::PARKED_TIMED;
2100 break;
2101 case BLOCKING:
2102 case BLOCKED:
2103 status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER;
2104 break;
2105 case WAIT:
2106 status = JavaThreadStatus::IN_OBJECT_WAIT;
2107 break;
2108 case TIMED_WAIT:
2109 status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED;
2110 break;
2111 case TERMINATED:
2112 status = JavaThreadStatus::TERMINATED;
2113 break;
2114 default:
2115 ShouldNotReachHere();
2116 }
2117 return status;
2118 }
2119
2120 ObjectMonitor* java_lang_VirtualThread::current_pending_monitor(oop vthread) {
2121 ObjectWaiter* waiter = objectWaiter(vthread);
2122 if (waiter != nullptr && waiter->at_monitorenter()) {
2123 return waiter->monitor();
2124 }
2125 return nullptr;
2126 }
2127
2128 ObjectMonitor* java_lang_VirtualThread::current_waiting_monitor(oop vthread) {
2129 ObjectWaiter* waiter = objectWaiter(vthread);
2130 if (waiter != nullptr && waiter->is_wait()) {
2131 return waiter->monitor();
2132 }
2133 return nullptr;
2134 }
2135
2136 bool java_lang_VirtualThread::is_preempted(oop vthread) {
2137 oop continuation = java_lang_VirtualThread::continuation(vthread);
2138 assert(continuation != nullptr, "vthread with no continuation");
2139 stackChunkOop chunk = jdk_internal_vm_Continuation::tail(continuation);
2140 return chunk != nullptr && chunk->preempted();
2141 }
2142
2143 #if INCLUDE_CDS
2144 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2145 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2146 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2147 }
2148 #endif
2149
2150 // java_lang_Throwable
2151
2152 int java_lang_Throwable::_backtrace_offset;
2153 int java_lang_Throwable::_detailMessage_offset;
2154 int java_lang_Throwable::_stackTrace_offset;
2155 int java_lang_Throwable::_depth_offset;
2156 int java_lang_Throwable::_cause_offset;
2157 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2158
2159 #define THROWABLE_FIELDS_DO(macro) \
2160 macro(_backtrace_offset, k, "backtrace", object_signature, false); \
2161 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \
2162 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2163 macro(_depth_offset, k, "depth", int_signature, false); \
2164 macro(_cause_offset, k, "cause", throwable_signature, false); \
2165 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2166
2167 void java_lang_Throwable::compute_offsets() {
2168 InstanceKlass* k = vmClasses::Throwable_klass();
2169 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2170 }
2171
2172 #if INCLUDE_CDS
2173 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2174 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2175 }
2176 #endif
2177
2178 oop java_lang_Throwable::unassigned_stacktrace() {
2179 InstanceKlass* ik = vmClasses::Throwable_klass();
2180 oop base = ik->static_field_base_raw();
2181 return base->obj_field(_static_unassigned_stacktrace_offset);
2182 }
2183
2184 oop java_lang_Throwable::backtrace(oop throwable) {
2185 return throwable->obj_field_acquire(_backtrace_offset);
2186 }
2187
2188
2189 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2190 throwable->release_obj_field_put(_backtrace_offset, value);
2191 }
2192
2193 int java_lang_Throwable::depth(oop throwable) {
2194 return throwable->int_field(_depth_offset);
2195 }
2196
2197 void java_lang_Throwable::set_depth(oop throwable, int value) {
2198 throwable->int_field_put(_depth_offset, value);
2199 }
2200
2201 oop java_lang_Throwable::message(oop throwable) {
2202 return throwable->obj_field(_detailMessage_offset);
2203 }
2204
2205 const char* java_lang_Throwable::message_as_utf8(oop throwable) {
2206 oop msg = java_lang_Throwable::message(throwable);
2207 const char* msg_utf8 = nullptr;
2208 if (msg != nullptr) {
2209 msg_utf8 = java_lang_String::as_utf8_string(msg);
2210 }
2211 return msg_utf8;
2212 }
2213
2214 oop java_lang_Throwable::cause(oop throwable) {
2215 return throwable->obj_field(_cause_offset);
2216 }
2217
2218 void java_lang_Throwable::set_message(oop throwable, oop value) {
2219 throwable->obj_field_put(_detailMessage_offset, value);
2220 }
2221
2222
2223 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2224 throwable->obj_field_put(_stackTrace_offset, st_element_array);
2225 }
2226
2227 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2228 set_stacktrace(throwable, nullptr);
2229 }
2230
2231
2232 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2233 ResourceMark rm;
2234 Klass* k = throwable->klass();
2235 assert(k != nullptr, "just checking");
2236 st->print("%s", k->external_name());
2237 oop msg = message(throwable);
2238 if (msg != nullptr) {
2239 st->print(": %s", java_lang_String::as_utf8_string(msg));
2240 }
2241 }
2242
2243 // After this many redefines, the stack trace is unreliable.
2244 const int MAX_VERSION = USHRT_MAX;
2245
2246 static inline bool version_matches(Method* method, int version) {
2247 assert(version < MAX_VERSION, "version is too big");
2248 return method != nullptr && (method->constants()->version() == version);
2249 }
2250
2251 // This class provides a simple wrapper over the internal structure of
2252 // exception backtrace to insulate users of the backtrace from needing
2253 // to know what it looks like.
2254 // The code of this class is not GC safe. Allocations can only happen
2255 // in expand().
2256 class BacktraceBuilder: public StackObj {
2257 friend class BacktraceIterator;
2258 private:
2259 Handle _backtrace;
2260 objArrayOop _head;
2261 typeArrayOop _methods;
2262 typeArrayOop _bcis;
2263 objArrayOop _mirrors;
2264 typeArrayOop _names; // Needed to insulate method name against redefinition.
2265 // True if the top frame of the backtrace is omitted because it shall be hidden.
2266 bool _has_hidden_top_frame;
2267 int _index;
2268 NoSafepointVerifier _nsv;
2269
2270 enum {
2271 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2272 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2273 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2274 trace_names_offset = java_lang_Throwable::trace_names_offset,
2275 trace_conts_offset = java_lang_Throwable::trace_conts_offset,
2276 trace_next_offset = java_lang_Throwable::trace_next_offset,
2277 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2278 trace_size = java_lang_Throwable::trace_size,
2279 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2280 };
2281
2282 // get info out of chunks
2283 static typeArrayOop get_methods(objArrayHandle chunk) {
2284 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2285 assert(methods != nullptr, "method array should be initialized in backtrace");
2286 return methods;
2287 }
2288 static typeArrayOop get_bcis(objArrayHandle chunk) {
2289 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2290 assert(bcis != nullptr, "bci array should be initialized in backtrace");
2291 return bcis;
2292 }
2293 static objArrayOop get_mirrors(objArrayHandle chunk) {
2294 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2295 assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2296 return mirrors;
2297 }
2298 static typeArrayOop get_names(objArrayHandle chunk) {
2299 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2300 assert(names != nullptr, "names array should be initialized in backtrace");
2301 return names;
2302 }
2303 static bool has_hidden_top_frame(objArrayHandle chunk) {
2304 oop hidden = chunk->obj_at(trace_hidden_offset);
2305 return hidden != nullptr;
2306 }
2307
2308 public:
2309
2310 // constructor for new backtrace
2311 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2312 expand(CHECK);
2313 _backtrace = Handle(THREAD, _head);
2314 _index = 0;
2315 }
2316
2317 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2318 _methods = get_methods(backtrace);
2319 _bcis = get_bcis(backtrace);
2320 _mirrors = get_mirrors(backtrace);
2321 _names = get_names(backtrace);
2322 _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2323 assert(_methods->length() == _bcis->length() &&
2324 _methods->length() == _mirrors->length() &&
2325 _mirrors->length() == _names->length(),
2326 "method and source information arrays should match");
2327
2328 // head is the preallocated backtrace
2329 _head = backtrace();
2330 _backtrace = Handle(thread, _head);
2331 _index = 0;
2332 }
2333
2334 void expand(TRAPS) {
2335 objArrayHandle old_head(THREAD, _head);
2336 PauseNoSafepointVerifier pnsv(&_nsv);
2337
2338 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2339 objArrayHandle new_head(THREAD, head);
2340
2341 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2342 typeArrayHandle new_methods(THREAD, methods);
2343
2344 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2345 typeArrayHandle new_bcis(THREAD, bcis);
2346
2347 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2348 objArrayHandle new_mirrors(THREAD, mirrors);
2349
2350 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2351 typeArrayHandle new_names(THREAD, names);
2352
2353 if (!old_head.is_null()) {
2354 old_head->obj_at_put(trace_next_offset, new_head());
2355 }
2356 new_head->obj_at_put(trace_methods_offset, new_methods());
2357 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2358 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2359 new_head->obj_at_put(trace_names_offset, new_names());
2360 new_head->obj_at_put(trace_hidden_offset, nullptr);
2361
2362 _head = new_head();
2363 _methods = new_methods();
2364 _bcis = new_bcis();
2365 _mirrors = new_mirrors();
2366 _names = new_names();
2367 _index = 0;
2368 }
2369
2370 oop backtrace() {
2371 return _backtrace();
2372 }
2373
2374 inline void push(Method* method, int bci, TRAPS) {
2375 // Smear the -1 bci to 0 since the array only holds unsigned
2376 // shorts. The later line number lookup would just smear the -1
2377 // to a 0 even if it could be recorded.
2378 if (bci == SynchronizationEntryBCI) bci = 0;
2379
2380 if (_index >= trace_chunk_size) {
2381 methodHandle mhandle(THREAD, method);
2382 expand(CHECK);
2383 method = mhandle();
2384 }
2385
2386 _methods->ushort_at_put(_index, method->orig_method_idnum());
2387 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2388
2389 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2390 // klass owning the symbols alive so their refcounts aren't decremented.
2391 Symbol* name = method->name();
2392 _names->symbol_at_put(_index, name);
2393
2394 // We need to save the mirrors in the backtrace to keep the class
2395 // from being unloaded while we still have this stack trace.
2396 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2397 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2398
2399 _index++;
2400 }
2401
2402 void set_has_hidden_top_frame() {
2403 if (!_has_hidden_top_frame) {
2404 // It would be nice to add java/lang/Boolean::TRUE here
2405 // to indicate that this backtrace has a hidden top frame.
2406 // But this code is used before TRUE is allocated.
2407 // Therefore let's just use an arbitrary legal oop
2408 // available right here. _methods is a short[].
2409 assert(_methods != nullptr, "we need a legal oop");
2410 _has_hidden_top_frame = true;
2411 _head->obj_at_put(trace_hidden_offset, _methods);
2412 }
2413 }
2414 };
2415
2416 struct BacktraceElement : public StackObj {
2417 int _method_id;
2418 int _bci;
2419 int _version;
2420 Symbol* _name;
2421 Handle _mirror;
2422 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2423 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2424 };
2425
2426 class BacktraceIterator : public StackObj {
2427 int _index;
2428 objArrayHandle _result;
2429 objArrayHandle _mirrors;
2430 typeArrayHandle _methods;
2431 typeArrayHandle _bcis;
2432 typeArrayHandle _names;
2433
2434 void init(objArrayHandle result, Thread* thread) {
2435 // Get method id, bci, version and mirror from chunk
2436 _result = result;
2437 if (_result.not_null()) {
2438 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2439 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2440 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2441 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2442 _index = 0;
2443 }
2444 }
2445 public:
2446 BacktraceIterator(objArrayHandle result, Thread* thread) {
2447 init(result, thread);
2448 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2449 }
2450
2451 BacktraceElement next(Thread* thread) {
2452 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2453 _methods->ushort_at(_index),
2454 Backtrace::version_at(_bcis->int_at(_index)),
2455 Backtrace::bci_at(_bcis->int_at(_index)),
2456 _names->symbol_at(_index));
2457 _index++;
2458
2459 if (_index >= java_lang_Throwable::trace_chunk_size) {
2460 int next_offset = java_lang_Throwable::trace_next_offset;
2461 // Get next chunk
2462 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2463 init(result, thread);
2464 }
2465 return e;
2466 }
2467
2468 bool repeat() {
2469 return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2470 }
2471 };
2472
2473
2474 // Print stack trace element to the specified output stream.
2475 // The output is formatted into a stringStream and written to the outputStream in one step.
2476 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2477 int version, int bci, Symbol* name) {
2478 ResourceMark rm;
2479 stringStream ss;
2480
2481 InstanceKlass* holder = java_lang_Class::as_InstanceKlass(mirror());
2482 const char* klass_name = holder->external_name();
2483 char* method_name = name->as_C_string();
2484 ss.print("\tat %s.%s(", klass_name, method_name);
2485
2486 // Print module information
2487 ModuleEntry* module = holder->module();
2488 if (module->is_named()) {
2489 char* module_name = module->name()->as_C_string();
2490 if (module->version() != nullptr) {
2491 char* module_version = module->version()->as_C_string();
2492 ss.print("%s@%s/", module_name, module_version);
2493 } else {
2494 ss.print("%s/", module_name);
2495 }
2496 }
2497
2498 char* source_file_name = nullptr;
2499 Symbol* source = Backtrace::get_source_file_name(holder, version);
2500 if (source != nullptr) {
2501 source_file_name = source->as_C_string();
2502 }
2503
2504 // The method can be null if the requested class version is gone
2505 Method* method = holder->method_with_orig_idnum(method_id, version);
2506 if (!version_matches(method, version)) {
2507 ss.print("Redefined)");
2508 } else {
2509 int line_number = Backtrace::get_line_number(method, bci);
2510 if (line_number == -2) {
2511 ss.print("Native Method)");
2512 } else {
2513 if (source_file_name != nullptr && (line_number != -1)) {
2514 // Sourcename and linenumber
2515 ss.print("%s:%d)", source_file_name, line_number);
2516 } else if (source_file_name != nullptr) {
2517 // Just sourcename
2518 ss.print("%s)", source_file_name);
2519 } else {
2520 // Neither sourcename nor linenumber
2521 ss.print("Unknown Source)");
2522 }
2523 nmethod* nm = method->code();
2524 if (WizardMode && nm != nullptr) {
2525 ss.print("(nmethod " INTPTR_FORMAT ")", p2i(nm));
2526 }
2527 }
2528 }
2529
2530 ss.cr();
2531 st->print_raw(ss.freeze(), ss.size());
2532 }
2533
2534 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2535 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2536 int method_id = method->orig_method_idnum();
2537 int version = method->constants()->version();
2538 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2539 }
2540
2541 /**
2542 * Print the throwable message and its stack trace plus all causes by walking the
2543 * cause chain. The output looks the same as of Throwable.printStackTrace().
2544 */
2545 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2546 // First, print the message.
2547 print(throwable(), st);
2548 st->cr();
2549
2550 // Now print the stack trace.
2551 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2552 while (throwable.not_null()) {
2553 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2554 if (result.is_null()) {
2555 st->print_raw_cr("\t<<no stack trace available>>");
2556 return;
2557 }
2558 BacktraceIterator iter(result, THREAD);
2559
2560 while (iter.repeat()) {
2561 BacktraceElement bte = iter.next(THREAD);
2562 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2563 }
2564 if (THREAD->can_call_java()) {
2565 // Call getCause() which doesn't necessarily return the _cause field.
2566 ExceptionMark em(THREAD);
2567 JavaValue cause(T_OBJECT);
2568 JavaCalls::call_virtual(&cause,
2569 throwable,
2570 throwable->klass(),
2571 vmSymbols::getCause_name(),
2572 vmSymbols::void_throwable_signature(),
2573 THREAD);
2574 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2575 if (HAS_PENDING_EXCEPTION) {
2576 CLEAR_PENDING_EXCEPTION;
2577 throwable = Handle();
2578 } else {
2579 throwable = Handle(THREAD, cause.get_oop());
2580 if (throwable.not_null()) {
2581 st->print("Caused by: ");
2582 print(throwable(), st);
2583 st->cr();
2584 }
2585 }
2586 } else {
2587 st->print_raw_cr("<<cannot call Java to get cause>>");
2588 return;
2589 }
2590 }
2591 }
2592
2593 /**
2594 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2595 */
2596 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2597 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2598 JavaValue result(T_VOID);
2599 JavaCalls::call_virtual(&result,
2600 throwable,
2601 vmClasses::Throwable_klass(),
2602 vmSymbols::printStackTrace_name(),
2603 vmSymbols::void_method_signature(),
2604 THREAD);
2605 }
2606
2607 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2608 if (!StackTraceInThrowable) return;
2609 ResourceMark rm(THREAD);
2610
2611 // Start out by clearing the backtrace for this object, in case the VM
2612 // runs out of memory while allocating the stack trace
2613 set_backtrace(throwable(), nullptr);
2614 // Clear lazily constructed Java level stacktrace if refilling occurs
2615 // This is unnecessary in 1.7+ but harmless
2616 clear_stacktrace(throwable());
2617
2618 int max_depth = MaxJavaStackTraceDepth;
2619 JavaThread* thread = THREAD;
2620
2621 BacktraceBuilder bt(CHECK);
2622
2623 // If there is no Java frame just return the method that was being called
2624 // with bci 0
2625 if (!thread->has_last_Java_frame()) {
2626 if (max_depth >= 1 && method() != nullptr) {
2627 bt.push(method(), 0, CHECK);
2628 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2629 set_depth(throwable(), 1);
2630 set_backtrace(throwable(), bt.backtrace());
2631 }
2632 return;
2633 }
2634
2635 // Instead of using vframe directly, this version of fill_in_stack_trace
2636 // basically handles everything by hand. This significantly improved the
2637 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2638 // See bug 6333838 for more details.
2639 // The "ASSERT" here is to verify this method generates the exactly same stack
2640 // trace as utilizing vframe.
2641 #ifdef ASSERT
2642 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2643 #endif
2644 int total_count = 0;
2645 RegisterMap map(thread,
2646 RegisterMap::UpdateMap::skip,
2647 RegisterMap::ProcessFrames::skip,
2648 RegisterMap::WalkContinuation::include);
2649 int decode_offset = 0;
2650 nmethod* nm = nullptr;
2651 bool skip_fillInStackTrace_check = false;
2652 bool skip_throwableInit_check = false;
2653 bool skip_hidden = !ShowHiddenFrames;
2654 bool show_carrier = ShowCarrierFrames;
2655 ContinuationEntry* cont_entry = thread->last_continuation();
2656 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2657 Method* method = nullptr;
2658 int bci = 0;
2659
2660 // Compiled java method case.
2661 if (decode_offset != 0) {
2662 DebugInfoReadStream stream(nm, decode_offset);
2663 decode_offset = stream.read_int();
2664 method = (Method*)nm->metadata_at(stream.read_int());
2665 bci = stream.read_bci();
2666 } else {
2667 if (fr.is_first_frame()) break;
2668
2669 if (Continuation::is_continuation_enterSpecial(fr)) {
2670 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2671 if (!show_carrier && cont_entry->is_virtual_thread()) {
2672 break;
2673 }
2674 cont_entry = cont_entry->parent();
2675 }
2676
2677 address pc = fr.pc();
2678 if (fr.is_interpreted_frame()) {
2679 address bcp;
2680 if (!map.in_cont()) {
2681 bcp = fr.interpreter_frame_bcp();
2682 method = fr.interpreter_frame_method();
2683 } else {
2684 bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2685 method = map.stack_chunk()->interpreter_frame_method(fr);
2686 }
2687 bci = method->bci_from(bcp);
2688 fr = fr.sender(&map);
2689 } else {
2690 CodeBlob* cb = fr.cb();
2691 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2692 // but non nmethod
2693 fr = fr.sender(&map);
2694 if (cb == nullptr || !cb->is_nmethod()) {
2695 continue;
2696 }
2697 nm = cb->as_nmethod();
2698 assert(nm->method() != nullptr, "must be");
2699 if (nm->method()->is_native()) {
2700 method = nm->method();
2701 bci = 0;
2702 } else {
2703 PcDesc* pd = nm->pc_desc_at(pc);
2704 decode_offset = pd->scope_decode_offset();
2705 // if decode_offset is not equal to 0, it will execute the
2706 // "compiled java method case" at the beginning of the loop.
2707 continue;
2708 }
2709 }
2710 }
2711 #ifdef ASSERT
2712 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2713 assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2714 st.next();
2715 }
2716 #endif
2717
2718 // the format of the stacktrace will be:
2719 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2720 // - 0 or more <init> methods for the exception class (skipped)
2721 // - rest of the stack
2722
2723 if (!skip_fillInStackTrace_check) {
2724 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2725 throwable->is_a(method->method_holder())) {
2726 continue;
2727 }
2728 else {
2729 skip_fillInStackTrace_check = true; // gone past them all
2730 }
2731 }
2732 if (!skip_throwableInit_check) {
2733 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2734
2735 // skip <init> methods of the exception class and superclasses
2736 // This is similar to classic VM.
2737 if (method->name() == vmSymbols::object_initializer_name() &&
2738 throwable->is_a(method->method_holder())) {
2739 continue;
2740 } else {
2741 // there are none or we've seen them all - either way stop checking
2742 skip_throwableInit_check = true;
2743 }
2744 }
2745 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2746 if (skip_hidden) {
2747 if (total_count == 0) {
2748 // The top frame will be hidden from the stack trace.
2749 bt.set_has_hidden_top_frame();
2750 }
2751 continue;
2752 }
2753 }
2754
2755 bt.push(method, bci, CHECK);
2756 total_count++;
2757 }
2758
2759 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2760
2761 // Put completed stack trace into throwable object
2762 set_backtrace(throwable(), bt.backtrace());
2763 set_depth(throwable(), total_count);
2764 }
2765
2766 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2767 // No-op if stack trace is disabled
2768 if (!StackTraceInThrowable) {
2769 return;
2770 }
2771
2772 // Disable stack traces for some preallocated out of memory errors
2773 if (!Universe::should_fill_in_stack_trace(throwable)) {
2774 return;
2775 }
2776
2777 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2778 PreserveExceptionMark pm(THREAD);
2779
2780 fill_in_stack_trace(throwable, method, THREAD);
2781 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2782 // original exception via the PreserveExceptionMark destructor.
2783 CLEAR_PENDING_EXCEPTION;
2784 }
2785
2786 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2787 // Allocate stack trace - backtrace is created but not filled in
2788
2789 // No-op if stack trace is disabled
2790 if (!StackTraceInThrowable) return;
2791 BacktraceBuilder bt(CHECK); // creates a backtrace
2792 set_backtrace(throwable(), bt.backtrace());
2793 }
2794
2795
2796 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2797 // Fill in stack trace into preallocated backtrace (no GC)
2798
2799 // No-op if stack trace is disabled
2800 if (!StackTraceInThrowable) return;
2801
2802 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2803
2804 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2805
2806 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2807 assert(backtrace.not_null(), "backtrace should have been preallocated");
2808
2809 ResourceMark rm(THREAD);
2810 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2811
2812 BacktraceBuilder bt(THREAD, backtrace);
2813
2814 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2815 // methods as preallocated errors aren't created by "java" code.
2816
2817 // fill in as much stack trace as possible
2818 int chunk_count = 0;
2819 for (;!st.at_end(); st.next()) {
2820 bt.push(st.method(), st.bci(), CHECK);
2821 chunk_count++;
2822
2823 // Bail-out for deep stacks
2824 if (chunk_count >= trace_chunk_size) break;
2825 }
2826 set_depth(throwable(), chunk_count);
2827 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2828
2829 // We support the Throwable immutability protocol defined for Java 7.
2830 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2831 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2832 }
2833
2834 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2835 objArrayHandle stack_trace_array_h, TRAPS) {
2836
2837 if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2838 THROW(vmSymbols::java_lang_NullPointerException());
2839 }
2840
2841 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2842
2843 if (stack_trace_array_h->length() != depth) {
2844 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2845 }
2846
2847 objArrayHandle result(THREAD, objArrayOop(backtrace()));
2848 BacktraceIterator iter(result, THREAD);
2849
2850 int index = 0;
2851 while (iter.repeat()) {
2852 BacktraceElement bte = iter.next(THREAD);
2853
2854 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2855
2856 if (stack_trace_element.is_null()) {
2857 THROW(vmSymbols::java_lang_NullPointerException());
2858 }
2859
2860 InstanceKlass* holder = java_lang_Class::as_InstanceKlass(bte._mirror());
2861 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2862
2863 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2864 method,
2865 bte._version,
2866 bte._bci,
2867 bte._name,
2868 CHECK);
2869 }
2870 }
2871
2872 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
2873 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
2874 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
2875 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
2876 // symbolic stacktrace of 'throwable'.
2877 assert(throwable.not_null(), "shouldn't be");
2878
2879 // Now create the message from the original exception and thread name.
2880 ResourceMark rm(current);
2881 const char *message = nullptr;
2882 oop detailed_message = java_lang_Throwable::message(throwable());
2883 if (detailed_message != nullptr) {
2884 message = java_lang_String::as_utf8_string(detailed_message);
2885 }
2886 stringStream st;
2887 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
2888 message == nullptr ? "" : ":");
2889 if (message == nullptr) {
2890 st.print("[in thread \"%s\"]", current->name());
2891 } else {
2892 st.print("%s [in thread \"%s\"]", message, current->name());
2893 }
2894
2895 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
2896 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
2897 // If new_exception returns a different exception while creating the exception,
2898 // abandon the attempt to save the initialization error and return null.
2899 if (init_error->klass()->name() != exception_name) {
2900 log_info(class, init)("Exception %s thrown while saving initialization exception",
2901 init_error->klass()->external_name());
2902 return Handle();
2903 }
2904
2905 // Call to java to fill in the stack trace and clear declaringClassObject to
2906 // not keep classes alive in the stack trace.
2907 // call this: public StackTraceElement[] getStackTrace()
2908 JavaValue result(T_ARRAY);
2909 JavaCalls::call_virtual(&result, throwable,
2910 vmClasses::Throwable_klass(),
2911 vmSymbols::getStackTrace_name(),
2912 vmSymbols::getStackTrace_signature(),
2913 current);
2914 if (!current->has_pending_exception()){
2915 Handle stack_trace(current, result.get_oop());
2916 assert(stack_trace->is_objArray(), "Should be an array");
2917 java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
2918 // Clear backtrace because the stacktrace should be used instead.
2919 set_backtrace(init_error(), nullptr);
2920 } else {
2921 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
2922 init_error->klass()->external_name());
2923 current->clear_pending_exception();
2924 }
2925
2926 return init_error;
2927 }
2928
2929 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
2930 JavaThread* current = JavaThread::current();
2931 objArrayHandle result(current, objArrayOop(backtrace(throwable)));
2932 BacktraceIterator iter(result, current);
2933 // No backtrace available.
2934 if (!iter.repeat()) return false;
2935
2936 // If the exception happened in a frame that has been hidden, i.e.,
2937 // omitted from the back trace, we can not compute the message.
2938 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
2939 if (hidden != nullptr) {
2940 return false;
2941 }
2942
2943 // Get first backtrace element.
2944 BacktraceElement bte = iter.next(current);
2945
2946 InstanceKlass* holder = java_lang_Class::as_InstanceKlass(bte._mirror());
2947 assert(holder != nullptr, "first element should be non-null");
2948 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
2949
2950 // Original version is no longer available.
2951 if (m == nullptr || !version_matches(m, bte._version)) {
2952 return false;
2953 }
2954
2955 *method = m;
2956 *bci = bte._bci;
2957 return true;
2958 }
2959
2960 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2961 // Allocate java.lang.StackTraceElement instance
2962 InstanceKlass* k = vmClasses::StackTraceElement_klass();
2963 assert(k != nullptr, "must be loaded in 1.4+");
2964 if (k->should_be_initialized()) {
2965 k->initialize(CHECK_NULL);
2966 }
2967
2968 Handle element = k->allocate_instance_handle(CHECK_NULL);
2969
2970 int version = method->constants()->version();
2971 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
2972 return element();
2973 }
2974
2975 void java_lang_StackTraceElement::fill_in(Handle element,
2976 InstanceKlass* holder, const methodHandle& method,
2977 int version, int bci, Symbol* name, TRAPS) {
2978 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
2979
2980 ResourceMark rm(THREAD);
2981 HandleMark hm(THREAD);
2982
2983 // Fill in class name
2984 Handle java_class(THREAD, holder->java_mirror());
2985 oop classname = java_lang_Class::name(java_class, CHECK);
2986 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2987 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2988
2989 oop loader = holder->class_loader();
2990 if (loader != nullptr) {
2991 oop loader_name = java_lang_ClassLoader::name(loader);
2992 if (loader_name != nullptr)
2993 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2994 }
2995
2996 // Fill in method name
2997 oop methodname = StringTable::intern(name, CHECK);
2998 java_lang_StackTraceElement::set_methodName(element(), methodname);
2999
3000 // Fill in module name and version
3001 ModuleEntry* module = holder->module();
3002 if (module->is_named()) {
3003 oop module_name = StringTable::intern(module->name(), CHECK);
3004 java_lang_StackTraceElement::set_moduleName(element(), module_name);
3005 oop module_version;
3006 if (module->version() != nullptr) {
3007 module_version = StringTable::intern(module->version(), CHECK);
3008 } else {
3009 module_version = nullptr;
3010 }
3011 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
3012 }
3013
3014 if (method() == nullptr || !version_matches(method(), version)) {
3015 // The method was redefined, accurate line number information isn't available
3016 java_lang_StackTraceElement::set_fileName(element(), nullptr);
3017 java_lang_StackTraceElement::set_lineNumber(element(), -1);
3018 } else {
3019 Symbol* source;
3020 oop source_file;
3021 int line_number;
3022 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
3023
3024 java_lang_StackTraceElement::set_fileName(element(), source_file);
3025 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
3026 }
3027 }
3028
3029 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
3030 InstanceKlass* holder,
3031 int version,
3032 const methodHandle& method,
3033 int bci,
3034 Symbol*& source,
3035 oop& source_file,
3036 int& line_number, TRAPS) {
3037 // Fill in source file name and line number.
3038 source = Backtrace::get_source_file_name(holder, version);
3039 source_file = java_lang_Class::source_file(java_class());
3040 if (source != nullptr) {
3041 // Class was not redefined. We can trust its cache if set,
3042 // else we have to initialize it.
3043 if (source_file == nullptr) {
3044 source_file = StringTable::intern(source, CHECK);
3045 java_lang_Class::set_source_file(java_class(), source_file);
3046 }
3047 } else {
3048 // Class was redefined. Dump the cache if it was set.
3049 if (source_file != nullptr) {
3050 source_file = nullptr;
3051 java_lang_Class::set_source_file(java_class(), source_file);
3052 }
3053 }
3054 line_number = Backtrace::get_line_number(method(), bci);
3055 }
3056
3057 #if INCLUDE_JVMCI
3058 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
3059 Symbol*& filename, int& line_number, TRAPS) {
3060 ResourceMark rm(THREAD);
3061 HandleMark hm(THREAD);
3062
3063 filename = nullptr;
3064 line_number = -1;
3065
3066 oop source_file;
3067 int version = method->constants()->version();
3068 InstanceKlass* holder = method->method_holder();
3069 Handle java_class(THREAD, holder->java_mirror());
3070 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
3071 }
3072 #endif // INCLUDE_JVMCI
3073
3074 // java_lang_ClassFrameInfo
3075
3076 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
3077 int java_lang_ClassFrameInfo::_flags_offset;
3078
3079 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
3080 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \
3081 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false)
3082
3083 void java_lang_ClassFrameInfo::compute_offsets() {
3084 InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
3085 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3086 }
3087
3088 #if INCLUDE_CDS
3089 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
3090 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3091 }
3092 #endif
3093
3094 static int get_flags(const methodHandle& m) {
3095 int flags = m->access_flags().as_method_flags();
3096 if (m->is_object_initializer()) {
3097 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR;
3098 } else {
3099 // Note: Static initializers can be here. Record them as plain methods.
3100 flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
3101 }
3102 if (m->caller_sensitive()) {
3103 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
3104 }
3105 if (m->is_hidden()) {
3106 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3107 }
3108 assert((flags & 0xFF000000) == 0, "unexpected flags");
3109 return flags;
3110 }
3111
3112 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3113 return obj->obj_field(_classOrMemberName_offset);
3114 }
3115
3116 int java_lang_ClassFrameInfo::flags(oop obj) {
3117 return obj->int_field(_flags_offset);
3118 }
3119
3120 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3121 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3122 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3123 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3124 stackFrame->int_field_put(_flags_offset, flags);
3125 }
3126
3127 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3128 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3129 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3130 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3131 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3132 stackFrame->int_field_put(_flags_offset, flags);
3133 }
3134
3135
3136 // java_lang_StackFrameInfo
3137
3138 int java_lang_StackFrameInfo::_type_offset;
3139 int java_lang_StackFrameInfo::_name_offset;
3140 int java_lang_StackFrameInfo::_bci_offset;
3141 int java_lang_StackFrameInfo::_version_offset;
3142 int java_lang_StackFrameInfo::_contScope_offset;
3143
3144 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3145 macro(_type_offset, k, "type", object_signature, false); \
3146 macro(_name_offset, k, "name", string_signature, false); \
3147 macro(_bci_offset, k, "bci", int_signature, false); \
3148 macro(_contScope_offset, k, "contScope", continuationscope_signature, false)
3149
3150 void java_lang_StackFrameInfo::compute_offsets() {
3151 InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3152 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3153 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3154 }
3155
3156 #if INCLUDE_CDS
3157 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3158 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3159 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3160 }
3161 #endif
3162
3163 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3164 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3165 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3166 return method;
3167 }
3168
3169 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3170 // set Method* or mid/cpref
3171 HandleMark hm(THREAD);
3172 Handle cont_h(THREAD, cont);
3173 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3174
3175 // set bci
3176 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3177 // method may be redefined; store the version
3178 int version = method->constants()->version();
3179 assert((jushort)version == version, "version should be short");
3180 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3181
3182 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3183 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3184 }
3185
3186 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3187 ResourceMark rm(THREAD);
3188 HandleMark hm(THREAD);
3189
3190 Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3191 InstanceKlass* holder = method->method_holder();
3192 short version = stackFrame->short_field(_version_offset);
3193 int bci = stackFrame->int_field(_bci_offset);
3194 Symbol* name = method->name();
3195 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3196 }
3197
3198 oop java_lang_StackFrameInfo::type(oop obj) {
3199 return obj->obj_field(_type_offset);
3200 }
3201
3202 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3203 obj->obj_field_put(_type_offset, value);
3204 }
3205
3206 oop java_lang_StackFrameInfo::name(oop obj) {
3207 return obj->obj_field(_name_offset);
3208 }
3209
3210 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3211 obj->obj_field_put(_name_offset, value);
3212 }
3213
3214 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3215 obj->short_field_put(_version_offset, value);
3216 }
3217
3218 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3219 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3220 obj->int_field_put(_bci_offset, value);
3221 }
3222
3223 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3224 obj->obj_field_put(_contScope_offset, value);
3225 }
3226
3227 int java_lang_LiveStackFrameInfo::_monitors_offset;
3228 int java_lang_LiveStackFrameInfo::_locals_offset;
3229 int java_lang_LiveStackFrameInfo::_operands_offset;
3230 int java_lang_LiveStackFrameInfo::_mode_offset;
3231
3232 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3233 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
3234 macro(_locals_offset, k, "locals", object_array_signature, false); \
3235 macro(_operands_offset, k, "operands", object_array_signature, false); \
3236 macro(_mode_offset, k, "mode", int_signature, false)
3237
3238 void java_lang_LiveStackFrameInfo::compute_offsets() {
3239 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3240 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3241 }
3242
3243 #if INCLUDE_CDS
3244 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3245 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3246 }
3247 #endif
3248
3249 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3250 obj->obj_field_put(_monitors_offset, value);
3251 }
3252
3253 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3254 obj->obj_field_put(_locals_offset, value);
3255 }
3256
3257 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3258 obj->obj_field_put(_operands_offset, value);
3259 }
3260
3261 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3262 obj->int_field_put(_mode_offset, value);
3263 }
3264
3265
3266 // java_lang_AccessibleObject
3267
3268 int java_lang_reflect_AccessibleObject::_override_offset;
3269
3270 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3271 macro(_override_offset, k, "override", bool_signature, false)
3272
3273 void java_lang_reflect_AccessibleObject::compute_offsets() {
3274 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3275 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3276 }
3277
3278 #if INCLUDE_CDS
3279 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3280 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3281 }
3282 #endif
3283
3284 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3285 return (jboolean) reflect->bool_field(_override_offset);
3286 }
3287
3288 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3289 reflect->bool_field_put(_override_offset, (int) value);
3290 }
3291
3292 // java_lang_reflect_Method
3293
3294 int java_lang_reflect_Method::_clazz_offset;
3295 int java_lang_reflect_Method::_name_offset;
3296 int java_lang_reflect_Method::_returnType_offset;
3297 int java_lang_reflect_Method::_parameterTypes_offset;
3298 int java_lang_reflect_Method::_exceptionTypes_offset;
3299 int java_lang_reflect_Method::_slot_offset;
3300 int java_lang_reflect_Method::_modifiers_offset;
3301 int java_lang_reflect_Method::_signature_offset;
3302 int java_lang_reflect_Method::_annotations_offset;
3303 int java_lang_reflect_Method::_parameter_annotations_offset;
3304 int java_lang_reflect_Method::_annotation_default_offset;
3305
3306 #define METHOD_FIELDS_DO(macro) \
3307 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3308 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3309 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
3310 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3311 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3312 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3313 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3314 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3315 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3316 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3317 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
3318
3319 void java_lang_reflect_Method::compute_offsets() {
3320 InstanceKlass* k = vmClasses::reflect_Method_klass();
3321 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3322 }
3323
3324 #if INCLUDE_CDS
3325 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3326 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3327 }
3328 #endif
3329
3330 Handle java_lang_reflect_Method::create(TRAPS) {
3331 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3332 InstanceKlass* klass = vmClasses::reflect_Method_klass();
3333 // This class is eagerly initialized during VM initialization, since we keep a reference
3334 // to one of the methods
3335 assert(klass->is_initialized(), "must be initialized");
3336 return klass->allocate_instance_handle(THREAD);
3337 }
3338
3339 oop java_lang_reflect_Method::clazz(oop reflect) {
3340 return reflect->obj_field(_clazz_offset);
3341 }
3342
3343 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3344 reflect->obj_field_put(_clazz_offset, value);
3345 }
3346
3347 int java_lang_reflect_Method::slot(oop reflect) {
3348 return reflect->int_field(_slot_offset);
3349 }
3350
3351 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3352 reflect->int_field_put(_slot_offset, value);
3353 }
3354
3355 void java_lang_reflect_Method::set_name(oop method, oop value) {
3356 method->obj_field_put(_name_offset, value);
3357 }
3358
3359 oop java_lang_reflect_Method::return_type(oop method) {
3360 return method->obj_field(_returnType_offset);
3361 }
3362
3363 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3364 method->obj_field_put(_returnType_offset, value);
3365 }
3366
3367 oop java_lang_reflect_Method::parameter_types(oop method) {
3368 return method->obj_field(_parameterTypes_offset);
3369 }
3370
3371 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3372 method->obj_field_put(_parameterTypes_offset, value);
3373 }
3374
3375 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3376 method->obj_field_put(_exceptionTypes_offset, value);
3377 }
3378
3379 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3380 method->int_field_put(_modifiers_offset, value);
3381 }
3382
3383 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3384 method->obj_field_put(_signature_offset, value);
3385 }
3386
3387 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3388 method->obj_field_put(_annotations_offset, value);
3389 }
3390
3391 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3392 method->obj_field_put(_parameter_annotations_offset, value);
3393 }
3394
3395 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3396 method->obj_field_put(_annotation_default_offset, value);
3397 }
3398
3399 int java_lang_reflect_Constructor::_clazz_offset;
3400 int java_lang_reflect_Constructor::_parameterTypes_offset;
3401 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3402 int java_lang_reflect_Constructor::_slot_offset;
3403 int java_lang_reflect_Constructor::_modifiers_offset;
3404 int java_lang_reflect_Constructor::_signature_offset;
3405 int java_lang_reflect_Constructor::_annotations_offset;
3406 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3407
3408 #define CONSTRUCTOR_FIELDS_DO(macro) \
3409 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3410 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3411 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3412 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3413 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3414 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3415 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3416 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3417
3418 void java_lang_reflect_Constructor::compute_offsets() {
3419 InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3420 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3421 }
3422
3423 #if INCLUDE_CDS
3424 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3425 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3426 }
3427 #endif
3428
3429 Handle java_lang_reflect_Constructor::create(TRAPS) {
3430 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3431 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3432 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3433 InstanceKlass* ik = InstanceKlass::cast(k);
3434 // Ensure it is initialized
3435 ik->initialize(CHECK_NH);
3436 return ik->allocate_instance_handle(THREAD);
3437 }
3438
3439 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3440 return reflect->obj_field(_clazz_offset);
3441 }
3442
3443 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3444 reflect->obj_field_put(_clazz_offset, value);
3445 }
3446
3447 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3448 return constructor->obj_field(_parameterTypes_offset);
3449 }
3450
3451 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3452 constructor->obj_field_put(_parameterTypes_offset, value);
3453 }
3454
3455 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3456 constructor->obj_field_put(_exceptionTypes_offset, value);
3457 }
3458
3459 int java_lang_reflect_Constructor::slot(oop reflect) {
3460 return reflect->int_field(_slot_offset);
3461 }
3462
3463 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3464 reflect->int_field_put(_slot_offset, value);
3465 }
3466
3467 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3468 constructor->int_field_put(_modifiers_offset, value);
3469 }
3470
3471 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3472 constructor->obj_field_put(_signature_offset, value);
3473 }
3474
3475 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3476 constructor->obj_field_put(_annotations_offset, value);
3477 }
3478
3479 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3480 method->obj_field_put(_parameter_annotations_offset, value);
3481 }
3482
3483 int java_lang_reflect_Field::_clazz_offset;
3484 int java_lang_reflect_Field::_name_offset;
3485 int java_lang_reflect_Field::_type_offset;
3486 int java_lang_reflect_Field::_slot_offset;
3487 int java_lang_reflect_Field::_modifiers_offset;
3488 int java_lang_reflect_Field::_trusted_final_offset;
3489 int java_lang_reflect_Field::_signature_offset;
3490 int java_lang_reflect_Field::_annotations_offset;
3491
3492 #define FIELD_FIELDS_DO(macro) \
3493 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3494 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3495 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \
3496 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3497 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3498 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \
3499 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3500 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3501
3502 void java_lang_reflect_Field::compute_offsets() {
3503 InstanceKlass* k = vmClasses::reflect_Field_klass();
3504 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3505 }
3506
3507 #if INCLUDE_CDS
3508 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3509 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3510 }
3511 #endif
3512
3513 Handle java_lang_reflect_Field::create(TRAPS) {
3514 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3515 Symbol* name = vmSymbols::java_lang_reflect_Field();
3516 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3517 InstanceKlass* ik = InstanceKlass::cast(k);
3518 // Ensure it is initialized
3519 ik->initialize(CHECK_NH);
3520 return ik->allocate_instance_handle(THREAD);
3521 }
3522
3523 oop java_lang_reflect_Field::clazz(oop reflect) {
3524 return reflect->obj_field(_clazz_offset);
3525 }
3526
3527 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3528 reflect->obj_field_put(_clazz_offset, value);
3529 }
3530
3531 oop java_lang_reflect_Field::name(oop field) {
3532 return field->obj_field(_name_offset);
3533 }
3534
3535 void java_lang_reflect_Field::set_name(oop field, oop value) {
3536 field->obj_field_put(_name_offset, value);
3537 }
3538
3539 oop java_lang_reflect_Field::type(oop field) {
3540 return field->obj_field(_type_offset);
3541 }
3542
3543 void java_lang_reflect_Field::set_type(oop field, oop value) {
3544 field->obj_field_put(_type_offset, value);
3545 }
3546
3547 int java_lang_reflect_Field::slot(oop reflect) {
3548 return reflect->int_field(_slot_offset);
3549 }
3550
3551 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3552 reflect->int_field_put(_slot_offset, value);
3553 }
3554
3555 int java_lang_reflect_Field::modifiers(oop field) {
3556 return field->int_field(_modifiers_offset);
3557 }
3558
3559 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3560 field->int_field_put(_modifiers_offset, value);
3561 }
3562
3563 void java_lang_reflect_Field::set_trusted_final(oop field) {
3564 field->bool_field_put(_trusted_final_offset, true);
3565 }
3566
3567 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3568 field->obj_field_put(_signature_offset, value);
3569 }
3570
3571 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3572 field->obj_field_put(_annotations_offset, value);
3573 }
3574
3575 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3576 // Allocate java.lang.reflect.RecordComponent instance
3577 HandleMark hm(THREAD);
3578 InstanceKlass* ik = vmClasses::RecordComponent_klass();
3579 assert(ik != nullptr, "must be loaded");
3580 ik->initialize(CHECK_NULL);
3581
3582 Handle element = ik->allocate_instance_handle(CHECK_NULL);
3583
3584 Handle decl_class(THREAD, holder->java_mirror());
3585 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3586
3587 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3588 oop component_name = StringTable::intern(name, CHECK_NULL);
3589 java_lang_reflect_RecordComponent::set_name(element(), component_name);
3590
3591 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3592 Handle component_type_h =
3593 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3594 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3595
3596 Method* accessor_method = nullptr;
3597 {
3598 // Prepend "()" to type to create the full method signature.
3599 ResourceMark rm(THREAD);
3600 int sig_len = type->utf8_length() + 3; // "()" and null char
3601 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3602 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3603 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3604 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3605 }
3606
3607 if (accessor_method != nullptr) {
3608 methodHandle method(THREAD, accessor_method);
3609 oop m = Reflection::new_method(method, false, CHECK_NULL);
3610 java_lang_reflect_RecordComponent::set_accessor(element(), m);
3611 } else {
3612 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3613 }
3614
3615 int sig_index = component->generic_signature_index();
3616 if (sig_index > 0) {
3617 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3618 oop component_sig = StringTable::intern(sig, CHECK_NULL);
3619 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3620 } else {
3621 java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3622 }
3623
3624 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3625 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3626
3627 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3628 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3629
3630 return element();
3631 }
3632
3633 int reflect_ConstantPool::_vmholder_offset;
3634
3635 void reflect_ConstantPool::compute_offsets() {
3636 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3637 // The field is injected and called Object vmholder in the jdk.internal.reflect.ConstantPool class.
3638 CONSTANTPOOL_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3639 }
3640
3641 #if INCLUDE_CDS
3642 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3643 CONSTANTPOOL_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3644 }
3645 #endif
3646
3647 int java_lang_reflect_Parameter::_name_offset;
3648 int java_lang_reflect_Parameter::_modifiers_offset;
3649 int java_lang_reflect_Parameter::_index_offset;
3650 int java_lang_reflect_Parameter::_executable_offset;
3651
3652 #define PARAMETER_FIELDS_DO(macro) \
3653 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3654 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3655 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \
3656 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3657
3658 void java_lang_reflect_Parameter::compute_offsets() {
3659 InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3660 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3661 }
3662
3663 #if INCLUDE_CDS
3664 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3665 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3666 }
3667 #endif
3668
3669 Handle java_lang_reflect_Parameter::create(TRAPS) {
3670 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3671 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3672 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3673 InstanceKlass* ik = InstanceKlass::cast(k);
3674 // Ensure it is initialized
3675 ik->initialize(CHECK_NH);
3676 return ik->allocate_instance_handle(THREAD);
3677 }
3678
3679 oop java_lang_reflect_Parameter::name(oop param) {
3680 return param->obj_field(_name_offset);
3681 }
3682
3683 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3684 param->obj_field_put(_name_offset, value);
3685 }
3686
3687 int java_lang_reflect_Parameter::modifiers(oop param) {
3688 return param->int_field(_modifiers_offset);
3689 }
3690
3691 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3692 param->int_field_put(_modifiers_offset, value);
3693 }
3694
3695 int java_lang_reflect_Parameter::index(oop param) {
3696 return param->int_field(_index_offset);
3697 }
3698
3699 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3700 param->int_field_put(_index_offset, value);
3701 }
3702
3703 oop java_lang_reflect_Parameter::executable(oop param) {
3704 return param->obj_field(_executable_offset);
3705 }
3706
3707 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3708 param->obj_field_put(_executable_offset, value);
3709 }
3710
3711 // java_lang_Module
3712
3713 int java_lang_Module::_loader_offset;
3714 int java_lang_Module::_name_offset;
3715 int java_lang_Module::_module_entry_offset;
3716
3717 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3718 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3719 return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3720 vmSymbols::java_lang_module_init_signature(),
3721 loader, module_name, CHECK_NH);
3722 }
3723
3724 #define MODULE_FIELDS_DO(macro) \
3725 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3726 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false)
3727
3728 void java_lang_Module::compute_offsets() {
3729 InstanceKlass* k = vmClasses::Module_klass();
3730 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3731 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3732 }
3733
3734 #if INCLUDE_CDS
3735 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3736 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3737 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3738 }
3739 #endif
3740
3741 oop java_lang_Module::loader(oop module) {
3742 return module->obj_field(_loader_offset);
3743 }
3744
3745 void java_lang_Module::set_loader(oop module, oop value) {
3746 module->obj_field_put(_loader_offset, value);
3747 }
3748
3749 oop java_lang_Module::name(oop module) {
3750 return module->obj_field(_name_offset);
3751 }
3752
3753 void java_lang_Module::set_name(oop module, oop value) {
3754 module->obj_field_put(_name_offset, value);
3755 }
3756
3757 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3758 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3759 assert(module != nullptr, "module can't be null");
3760 assert(oopDesc::is_oop(module), "module must be oop");
3761
3762 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3763 return module_entry;
3764 }
3765
3766 ModuleEntry* java_lang_Module::module_entry(oop module) {
3767 ModuleEntry* module_entry = module_entry_raw(module);
3768 if (module_entry == nullptr) {
3769 // If the inject field containing the ModuleEntry* is null then return the
3770 // class loader's unnamed module.
3771 oop loader = java_lang_Module::loader(module);
3772 Handle h_loader = Handle(Thread::current(), loader);
3773 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3774 return loader_cld->unnamed_module();
3775 }
3776 return module_entry;
3777 }
3778
3779 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3780 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3781 assert(module != nullptr, "module can't be null");
3782 assert(oopDesc::is_oop(module), "module must be oop");
3783 module->address_field_put(_module_entry_offset, (address)module_entry);
3784 }
3785
3786 Handle reflect_ConstantPool::create(TRAPS) {
3787 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3788 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3789 // Ensure it is initialized
3790 k->initialize(CHECK_NH);
3791 return k->allocate_instance_handle(THREAD);
3792 }
3793
3794
3795 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3796 assert(_vmholder_offset != 0, "Uninitialized vmholder");
3797 oop mirror = value->pool_holder()->java_mirror();
3798 // Save the mirror to get back the constant pool.
3799 reflect->obj_field_put(_vmholder_offset, mirror);
3800 }
3801
3802 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3803 assert(_vmholder_offset != 0, "Uninitialized vmholder");
3804 oop mirror = reflect->obj_field(_vmholder_offset);
3805 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(mirror);
3806
3807 // Get the constant pool back from the klass. Since class redefinition
3808 // merges the new constant pool into the old, this is essentially the
3809 // same constant pool as the original. If constant pool merging is
3810 // no longer done in the future, this will have to change to save
3811 // the original.
3812 return ik->constants();
3813 }
3814
3815
3816 // Support for java_lang_ref_Reference
3817
3818 bool java_lang_ref_Reference::_offsets_initialized;
3819
3820 int java_lang_ref_Reference::_referent_offset;
3821 int java_lang_ref_Reference::_queue_offset;
3822 int java_lang_ref_Reference::_next_offset;
3823 int java_lang_ref_Reference::_discovered_offset;
3824
3825 #define REFERENCE_FIELDS_DO(macro) \
3826 macro(_referent_offset, k, "referent", object_signature, false); \
3827 macro(_queue_offset, k, "queue", referencequeue_signature, false); \
3828 macro(_next_offset, k, "next", reference_signature, false); \
3829 macro(_discovered_offset, k, "discovered", reference_signature, false);
3830
3831 void java_lang_ref_Reference::compute_offsets() {
3832 if (_offsets_initialized) {
3833 return;
3834 }
3835 _offsets_initialized = true;
3836 InstanceKlass* k = vmClasses::Reference_klass();
3837 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3838 }
3839
3840 #if INCLUDE_CDS
3841 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3842 f->do_bool(&_offsets_initialized);
3843 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3844 }
3845 #endif
3846
3847 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3848 assert(obj != nullptr, "sanity");
3849 if (offset != _referent_offset) {
3850 return false;
3851 }
3852
3853 Klass* k = obj->klass();
3854 if (!k->is_instance_klass()) {
3855 return false;
3856 }
3857
3858 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3859 bool is_reference = ik->reference_type() != REF_NONE;
3860 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
3861 return is_reference;
3862 }
3863
3864 int java_lang_boxing_object::_value_offset;
3865 int java_lang_boxing_object::_long_value_offset;
3866
3867 #define BOXING_FIELDS_DO(macro) \
3868 macro(_value_offset, integerKlass, "value", int_signature, false); \
3869 macro(_long_value_offset, longKlass, "value", long_signature, false);
3870
3871 void java_lang_boxing_object::compute_offsets() {
3872 InstanceKlass* integerKlass = vmClasses::Integer_klass();
3873 InstanceKlass* longKlass = vmClasses::Long_klass();
3874 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3875 }
3876
3877 #if INCLUDE_CDS
3878 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
3879 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3880 }
3881 #endif
3882
3883 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3884 Klass* k = vmClasses::box_klass(type);
3885 if (k == nullptr) return nullptr;
3886 InstanceKlass* ik = InstanceKlass::cast(k);
3887 if (!ik->is_initialized()) {
3888 ik->initialize(CHECK_NULL);
3889 }
3890 return ik->allocate_instance(THREAD);
3891 }
3892
3893
3894 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3895 oop box = initialize_and_allocate(type, CHECK_NULL);
3896 if (box == nullptr) return nullptr;
3897 switch (type) {
3898 case T_BOOLEAN:
3899 box->bool_field_put(_value_offset, value->z);
3900 break;
3901 case T_CHAR:
3902 box->char_field_put(_value_offset, value->c);
3903 break;
3904 case T_FLOAT:
3905 box->float_field_put(_value_offset, value->f);
3906 break;
3907 case T_DOUBLE:
3908 box->double_field_put(_long_value_offset, value->d);
3909 break;
3910 case T_BYTE:
3911 box->byte_field_put(_value_offset, value->b);
3912 break;
3913 case T_SHORT:
3914 box->short_field_put(_value_offset, value->s);
3915 break;
3916 case T_INT:
3917 box->int_field_put(_value_offset, value->i);
3918 break;
3919 case T_LONG:
3920 box->long_field_put(_long_value_offset, value->j);
3921 break;
3922 default:
3923 return nullptr;
3924 }
3925 return box;
3926 }
3927
3928
3929 BasicType java_lang_boxing_object::basic_type(oop box) {
3930 if (box == nullptr) return T_ILLEGAL;
3931 BasicType type = vmClasses::box_klass_type(box->klass());
3932 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3933 return T_ILLEGAL;
3934 return type;
3935 }
3936
3937
3938 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3939 BasicType type = vmClasses::box_klass_type(box->klass());
3940 switch (type) {
3941 case T_BOOLEAN:
3942 value->z = box->bool_field(_value_offset);
3943 break;
3944 case T_CHAR:
3945 value->c = box->char_field(_value_offset);
3946 break;
3947 case T_FLOAT:
3948 value->f = box->float_field(_value_offset);
3949 break;
3950 case T_DOUBLE:
3951 value->d = box->double_field(_long_value_offset);
3952 break;
3953 case T_BYTE:
3954 value->b = box->byte_field(_value_offset);
3955 break;
3956 case T_SHORT:
3957 value->s = box->short_field(_value_offset);
3958 break;
3959 case T_INT:
3960 value->i = box->int_field(_value_offset);
3961 break;
3962 case T_LONG:
3963 value->j = box->long_field(_long_value_offset);
3964 break;
3965 default:
3966 return T_ILLEGAL;
3967 } // end switch
3968 return type;
3969 }
3970
3971
3972 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3973 BasicType type = vmClasses::box_klass_type(box->klass());
3974 switch (type) {
3975 case T_BOOLEAN:
3976 box->bool_field_put(_value_offset, value->z);
3977 break;
3978 case T_CHAR:
3979 box->char_field_put(_value_offset, value->c);
3980 break;
3981 case T_FLOAT:
3982 box->float_field_put(_value_offset, value->f);
3983 break;
3984 case T_DOUBLE:
3985 box->double_field_put(_long_value_offset, value->d);
3986 break;
3987 case T_BYTE:
3988 box->byte_field_put(_value_offset, value->b);
3989 break;
3990 case T_SHORT:
3991 box->short_field_put(_value_offset, value->s);
3992 break;
3993 case T_INT:
3994 box->int_field_put(_value_offset, value->i);
3995 break;
3996 case T_LONG:
3997 box->long_field_put(_long_value_offset, value->j);
3998 break;
3999 default:
4000 return T_ILLEGAL;
4001 } // end switch
4002 return type;
4003 }
4004
4005
4006 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
4007 switch (type) {
4008 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
4009 case T_CHAR: st->print("%d", value->c); break;
4010 case T_BYTE: st->print("%d", value->b); break;
4011 case T_SHORT: st->print("%d", value->s); break;
4012 case T_INT: st->print("%d", value->i); break;
4013 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
4014 case T_FLOAT: st->print("%f", value->f); break;
4015 case T_DOUBLE: st->print("%lf", value->d); break;
4016 default: st->print("type %d?", type); break;
4017 }
4018 }
4019
4020
4021 // Support for java_lang_ref_SoftReference
4022 //
4023
4024 int java_lang_ref_SoftReference::_timestamp_offset;
4025 int java_lang_ref_SoftReference::_static_clock_offset;
4026
4027 #define SOFTREFERENCE_FIELDS_DO(macro) \
4028 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
4029 macro(_static_clock_offset, k, "clock", long_signature, true)
4030
4031 void java_lang_ref_SoftReference::compute_offsets() {
4032 InstanceKlass* k = vmClasses::SoftReference_klass();
4033 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4034 }
4035
4036 #if INCLUDE_CDS
4037 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
4038 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4039 }
4040 #endif
4041
4042 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
4043 return ref->long_field(_timestamp_offset);
4044 }
4045
4046 jlong java_lang_ref_SoftReference::clock() {
4047 InstanceKlass* ik = vmClasses::SoftReference_klass();
4048 oop base = ik->static_field_base_raw();
4049 return base->long_field(_static_clock_offset);
4050 }
4051
4052 void java_lang_ref_SoftReference::set_clock(jlong value) {
4053 InstanceKlass* ik = vmClasses::SoftReference_klass();
4054 oop base = ik->static_field_base_raw();
4055 base->long_field_put(_static_clock_offset, value);
4056 }
4057
4058 // Support for java_lang_invoke_DirectMethodHandle
4059
4060 int java_lang_invoke_DirectMethodHandle::_member_offset;
4061
4062 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
4063 oop member_name = nullptr;
4064 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
4065 "a DirectMethodHandle oop is expected");
4066 return dmh->obj_field(_member_offset);
4067 }
4068
4069 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
4070 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
4071
4072 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
4073 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
4074 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4075 }
4076
4077 #if INCLUDE_CDS
4078 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
4079 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4080 }
4081 #endif
4082
4083 // Support for java_lang_invoke_MethodHandle
4084
4085 int java_lang_invoke_MethodHandle::_type_offset;
4086 int java_lang_invoke_MethodHandle::_form_offset;
4087
4088 int java_lang_invoke_MemberName::_clazz_offset;
4089 int java_lang_invoke_MemberName::_name_offset;
4090 int java_lang_invoke_MemberName::_type_offset;
4091 int java_lang_invoke_MemberName::_flags_offset;
4092 int java_lang_invoke_MemberName::_method_offset;
4093 int java_lang_invoke_MemberName::_vmindex_offset;
4094
4095 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
4096 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
4097
4098 int java_lang_invoke_LambdaForm::_vmentry_offset;
4099
4100 #define METHODHANDLE_FIELDS_DO(macro) \
4101 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4102 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
4103
4104 void java_lang_invoke_MethodHandle::compute_offsets() {
4105 InstanceKlass* k = vmClasses::MethodHandle_klass();
4106 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4107 }
4108
4109 #if INCLUDE_CDS
4110 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4111 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4112 }
4113 #endif
4114
4115 #define MEMBERNAME_FIELDS_DO(macro) \
4116 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4117 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4118 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
4119 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
4120 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
4121
4122 void java_lang_invoke_MemberName::compute_offsets() {
4123 InstanceKlass* k = vmClasses::MemberName_klass();
4124 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4125 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4126 }
4127
4128 #if INCLUDE_CDS
4129 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4130 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4131 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4132 }
4133 #endif
4134
4135 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4136 macro(_vmholder_offset, k, "vmholder", class_signature, false)
4137
4138 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4139 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4140 assert(k != nullptr, "jdk mismatch");
4141 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4142 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4143 }
4144
4145 #if INCLUDE_CDS
4146 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4147 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4148 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4149 }
4150 #endif
4151
4152 #define LAMBDAFORM_FIELDS_DO(macro) \
4153 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4154
4155 void java_lang_invoke_LambdaForm::compute_offsets() {
4156 InstanceKlass* k = vmClasses::LambdaForm_klass();
4157 assert (k != nullptr, "jdk mismatch");
4158 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4159 }
4160
4161 #if INCLUDE_CDS
4162 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4163 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4164 }
4165 #endif
4166
4167 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4168 return obj != nullptr && is_subclass(obj->klass());
4169 }
4170
4171 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4172 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4173
4174 #define NEP_FIELDS_DO(macro) \
4175 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
4176 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4177
4178 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4179 return obj != nullptr && is_subclass(obj->klass());
4180 }
4181
4182 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4183 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4184 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4185 }
4186
4187 #if INCLUDE_CDS
4188 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4189 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4190 }
4191 #endif
4192
4193 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4194 return entry->obj_field(_method_type_offset);
4195 }
4196
4197 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4198 return entry->long_field(_downcall_stub_address_offset);
4199 }
4200
4201 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4202 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4203 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4204 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4205 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4206 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4207 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4208
4209 #define ABIDescriptor_FIELDS_DO(macro) \
4210 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4211 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4212 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4213 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4214 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4215 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4216 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4217
4218 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4219 return obj != nullptr && is_subclass(obj->klass());
4220 }
4221
4222 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4223 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4224 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4225 }
4226
4227 #if INCLUDE_CDS
4228 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4229 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4230 }
4231 #endif
4232
4233 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4234 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4235 }
4236
4237 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4238 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4239 }
4240
4241 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4242 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4243 }
4244
4245 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4246 return entry->int_field(_stackAlignment_offset);
4247 }
4248
4249 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4250 return entry->int_field(_shadowSpace_offset);
4251 }
4252
4253 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4254 return entry->obj_field(_scratch1_offset);
4255 }
4256
4257 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4258 return entry->obj_field(_scratch2_offset);
4259 }
4260
4261 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4262 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4263 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4264 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4265
4266 #define VMStorage_FIELDS_DO(macro) \
4267 macro(_type_offset, k, "type", byte_signature, false); \
4268 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4269 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4270 macro(_debugName_offset, k, "debugName", string_signature, false); \
4271
4272 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4273 return obj != nullptr && is_subclass(obj->klass());
4274 }
4275
4276 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4277 InstanceKlass* k = vmClasses::VMStorage_klass();
4278 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4279 }
4280
4281 #if INCLUDE_CDS
4282 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4283 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4284 }
4285 #endif
4286
4287 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4288 return entry->byte_field(_type_offset);
4289 }
4290
4291 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4292 return entry->int_field(_indexOrOffset_offset);
4293 }
4294
4295 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4296 return entry->short_field(_segmentMaskOrSize_offset);
4297 }
4298
4299 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4300 return entry->obj_field(_debugName_offset);
4301 }
4302
4303 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4304 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4305
4306 #define CallConv_FIELDS_DO(macro) \
4307 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4308 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4309
4310 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4311 return obj != nullptr && is_subclass(obj->klass());
4312 }
4313
4314 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4315 InstanceKlass* k = vmClasses::CallConv_klass();
4316 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4317 }
4318
4319 #if INCLUDE_CDS
4320 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4321 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4322 }
4323 #endif
4324
4325 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4326 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4327 }
4328
4329 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4330 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4331 }
4332
4333 oop java_lang_invoke_MethodHandle::type(oop mh) {
4334 return mh->obj_field(_type_offset);
4335 }
4336
4337 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4338 mh->obj_field_put(_type_offset, mtype);
4339 }
4340
4341 oop java_lang_invoke_MethodHandle::form(oop mh) {
4342 assert(_form_offset != 0, "");
4343 return mh->obj_field(_form_offset);
4344 }
4345
4346 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4347 assert(_form_offset != 0, "");
4348 mh->obj_field_put(_form_offset, lform);
4349 }
4350
4351 /// MemberName accessors
4352
4353 oop java_lang_invoke_MemberName::clazz(oop mname) {
4354 assert(is_instance(mname), "wrong type");
4355 return mname->obj_field(_clazz_offset);
4356 }
4357
4358 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4359 assert(is_instance(mname), "wrong type");
4360 mname->obj_field_put(_clazz_offset, clazz);
4361 }
4362
4363 oop java_lang_invoke_MemberName::name(oop mname) {
4364 assert(is_instance(mname), "wrong type");
4365 return mname->obj_field(_name_offset);
4366 }
4367
4368 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4369 assert(is_instance(mname), "wrong type");
4370 mname->obj_field_put(_name_offset, name);
4371 }
4372
4373 oop java_lang_invoke_MemberName::type(oop mname) {
4374 assert(is_instance(mname), "wrong type");
4375 return mname->obj_field(_type_offset);
4376 }
4377
4378 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4379 assert(is_instance(mname), "wrong type");
4380 mname->obj_field_put(_type_offset, type);
4381 }
4382
4383 int java_lang_invoke_MemberName::flags(oop mname) {
4384 assert(is_instance(mname), "wrong type");
4385 return mname->int_field(_flags_offset);
4386 }
4387
4388 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4389 assert(is_instance(mname), "wrong type");
4390 mname->int_field_put(_flags_offset, flags);
4391 }
4392
4393
4394 // Return vmtarget from ResolvedMethodName method field through indirection
4395 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4396 assert(is_instance(mname), "wrong type");
4397 oop method = mname->obj_field(_method_offset);
4398 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4399 }
4400
4401 bool java_lang_invoke_MemberName::is_method(oop mname) {
4402 assert(is_instance(mname), "must be MemberName");
4403 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
4404 }
4405
4406 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4407 assert(is_instance(mname), "wrong type");
4408 mname->obj_field_put(_method_offset, resolved_method);
4409 }
4410
4411 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4412 assert(is_instance(mname), "wrong type");
4413 return (intptr_t) mname->address_field(_vmindex_offset);
4414 }
4415
4416 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4417 assert(is_instance(mname), "wrong type");
4418 mname->address_field_put(_vmindex_offset, (address) index);
4419 }
4420
4421
4422 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4423 assert(is_instance(resolved_method), "wrong type");
4424 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4425 assert(m->is_method(), "must be");
4426 return m;
4427 }
4428
4429 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4430 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4431 assert(is_instance(resolved_method), "wrong type");
4432 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4433 }
4434
4435 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4436 assert(is_instance(resolved_method), "wrong type");
4437 resolved_method->obj_field_put(_vmholder_offset, holder);
4438 }
4439
4440 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4441 const Method* method = m();
4442
4443 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4444 oop resolved_method = ResolvedMethodTable::find_method(method);
4445 if (resolved_method != nullptr) {
4446 return resolved_method;
4447 }
4448
4449 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4450 if (!k->is_initialized()) {
4451 k->initialize(CHECK_NULL);
4452 }
4453
4454 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4455
4456 NoSafepointVerifier nsv;
4457
4458 if (method->is_old()) {
4459 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4460 method->get_new_method();
4461 }
4462
4463 InstanceKlass* holder = method->method_holder();
4464
4465 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4466 // Add a reference to the loader (actually mirror because hidden classes may not have
4467 // distinct loaders) to ensure the metadata is kept alive.
4468 // This mirror may be different than the one in clazz field.
4469 set_vmholder(new_resolved_method, holder->java_mirror());
4470
4471 // Set flag in class to indicate this InstanceKlass has entries in the table
4472 // to avoid walking table during redefinition if none of the redefined classes
4473 // have any membernames in the table.
4474 holder->set_has_resolved_methods();
4475
4476 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4477 }
4478
4479 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4480 assert(is_instance(lform), "wrong type");
4481 return lform->obj_field(_vmentry_offset);
4482 }
4483
4484
4485 // Support for java_lang_invoke_MethodType
4486
4487 int java_lang_invoke_MethodType::_rtype_offset;
4488 int java_lang_invoke_MethodType::_ptypes_offset;
4489
4490 #define METHODTYPE_FIELDS_DO(macro) \
4491 macro(_rtype_offset, k, "rtype", class_signature, false); \
4492 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4493
4494 void java_lang_invoke_MethodType::compute_offsets() {
4495 InstanceKlass* k = vmClasses::MethodType_klass();
4496 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4497 }
4498
4499 #if INCLUDE_CDS
4500 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4501 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4502 }
4503 #endif
4504
4505 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4506 st->print("(");
4507 objArrayOop pts = ptypes(mt);
4508 if (pts != nullptr) {
4509 for (int i = 0, limit = pts->length(); i < limit; i++) {
4510 java_lang_Class::print_signature(pts->obj_at(i), st);
4511 }
4512 } else {
4513 st->print("null");
4514 }
4515 st->print(")");
4516 oop rt = rtype(mt);
4517 if (rt != nullptr) {
4518 java_lang_Class::print_signature(rt, st);
4519 } else {
4520 st->print("null");
4521 }
4522 }
4523
4524 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4525 ResourceMark rm;
4526 stringStream buffer(128);
4527 print_signature(mt, &buffer);
4528 const char* sigstr = buffer.base();
4529 int siglen = (int) buffer.size();
4530 Symbol *name;
4531 if (!intern_if_not_found) {
4532 name = SymbolTable::probe(sigstr, siglen);
4533 } else {
4534 name = SymbolTable::new_symbol(sigstr, siglen);
4535 }
4536 return name;
4537 }
4538
4539 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4540 if (mt1 == mt2)
4541 return true;
4542 if (rtype(mt1) != rtype(mt2))
4543 return false;
4544 if (ptype_count(mt1) != ptype_count(mt2))
4545 return false;
4546 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4547 if (ptype(mt1, i) != ptype(mt2, i))
4548 return false;
4549 }
4550 return true;
4551 }
4552
4553 oop java_lang_invoke_MethodType::rtype(oop mt) {
4554 assert(is_instance(mt), "must be a MethodType");
4555 return mt->obj_field(_rtype_offset);
4556 }
4557
4558 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4559 assert(is_instance(mt), "must be a MethodType");
4560 return (objArrayOop) mt->obj_field(_ptypes_offset);
4561 }
4562
4563 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4564 return ptypes(mt)->obj_at(idx);
4565 }
4566
4567 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4568 return ptypes(mt)->length();
4569 }
4570
4571 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4572 objArrayOop pts = ptypes(mt);
4573 int count = pts->length();
4574 int slots = 0;
4575 for (int i = 0; i < count; i++) {
4576 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4577 slots += type2size[bt];
4578 }
4579 return slots;
4580 }
4581
4582 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4583 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4584 return type2size[bt];
4585 }
4586
4587
4588 // Support for java_lang_invoke_CallSite
4589
4590 int java_lang_invoke_CallSite::_target_offset;
4591 int java_lang_invoke_CallSite::_vmdependencies_offset;
4592 int java_lang_invoke_CallSite::_last_cleanup_offset;
4593
4594 #define CALLSITE_FIELDS_DO(macro) \
4595 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
4596
4597 void java_lang_invoke_CallSite::compute_offsets() {
4598 InstanceKlass* k = vmClasses::CallSite_klass();
4599 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4600 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4601 }
4602
4603 #if INCLUDE_CDS
4604 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4605 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4606 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4607 }
4608 #endif
4609
4610 DependencyContext java_lang_invoke_CallSite::vmdependencies(oop call_site) {
4611 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4612 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4613 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4614 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4615 return dep_ctx;
4616 }
4617
4618 // Support for java_lang_invoke_ConstantCallSite
4619
4620 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4621
4622 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4623 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4624
4625 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4626 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4627 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4628 }
4629
4630 #if INCLUDE_CDS
4631 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4632 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4633 }
4634 #endif
4635
4636 // Support for java_lang_ClassLoader
4637
4638 int java_lang_ClassLoader::_loader_data_offset;
4639 int java_lang_ClassLoader::_parallelCapable_offset;
4640 int java_lang_ClassLoader::_name_offset;
4641 int java_lang_ClassLoader::_nameAndId_offset;
4642 int java_lang_ClassLoader::_unnamedModule_offset;
4643 int java_lang_ClassLoader::_parent_offset;
4644
4645 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4646 assert(loader != nullptr, "loader must not be null");
4647 assert(oopDesc::is_oop(loader), "loader must be oop");
4648 return AtomicAccess::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4649 }
4650
4651 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4652 assert(loader != nullptr, "loader must not be null");
4653 assert(oopDesc::is_oop(loader), "loader must be oop");
4654 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4655 }
4656
4657 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4658 assert(loader != nullptr, "loader must not be null");
4659 assert(oopDesc::is_oop(loader), "loader must be oop");
4660 AtomicAccess::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4661 }
4662
4663 #define CLASSLOADER_FIELDS_DO(macro) \
4664 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4665 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4666 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
4667 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4668 macro(_parent_offset, k1, "parent", classloader_signature, false)
4669
4670 void java_lang_ClassLoader::compute_offsets() {
4671 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4672 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4673
4674 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4675 }
4676
4677 #if INCLUDE_CDS
4678 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4679 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4680 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4681 }
4682 #endif
4683
4684 oop java_lang_ClassLoader::parent(oop loader) {
4685 assert(is_instance(loader), "loader must be oop");
4686 return loader->obj_field(_parent_offset);
4687 }
4688
4689 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4690 assert(is_instance(loader), "loader must be oop");
4691 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4692 }
4693
4694 // Returns the name field of this class loader. If the name field has not
4695 // been set, null will be returned.
4696 oop java_lang_ClassLoader::name(oop loader) {
4697 assert(is_instance(loader), "loader must be oop");
4698 return loader->obj_field(_name_offset);
4699 }
4700
4701 // Returns the nameAndId field of this class loader. The format is
4702 // as follows:
4703 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4704 // If the defining loader has no name then <qualified-class-name> @<id>
4705 // If built-in loader, then omit '@<id>' as there is only one instance.
4706 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4707 oop java_lang_ClassLoader::nameAndId(oop loader) {
4708 assert(is_instance(loader), "loader must be oop");
4709 return loader->obj_field(_nameAndId_offset);
4710 }
4711
4712 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4713 assert(is_instance(loader), "loader must be oop");
4714 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4715 oop acl = loader;
4716 DEBUG_ONLY(jint loop_count = 0);
4717 // This loop taken verbatim from ClassLoader.java:
4718 do {
4719 acl = parent(acl);
4720 if (cl == acl) {
4721 return true;
4722 }
4723 assert(++loop_count > 0, "loop_count overflow");
4724 } while (acl != nullptr);
4725 return false;
4726 }
4727
4728 bool java_lang_ClassLoader::is_instance(oop obj) {
4729 return obj != nullptr && is_subclass(obj->klass());
4730 }
4731
4732
4733 // For class loader classes, parallelCapable defined
4734 // based on non-null field
4735 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4736 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4737 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4738 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4739 }
4740
4741 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4742 oop cl = SystemDictionary::java_system_loader();
4743 while(cl != nullptr) {
4744 if (cl == loader) return true;
4745 cl = parent(cl);
4746 }
4747 return false;
4748 }
4749
4750 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4751 assert(is_instance(loader), "loader must be oop");
4752 return loader->obj_field(_unnamedModule_offset);
4753 }
4754
4755 // Support for java_lang_System
4756 //
4757
4758 int java_lang_System::_static_in_offset;
4759 int java_lang_System::_static_out_offset;
4760 int java_lang_System::_static_err_offset;
4761
4762 #define SYSTEM_FIELDS_DO(macro) \
4763 macro(_static_in_offset, k, "in", input_stream_signature, true); \
4764 macro(_static_out_offset, k, "out", print_stream_signature, true); \
4765 macro(_static_err_offset, k, "err", print_stream_signature, true);
4766
4767 void java_lang_System::compute_offsets() {
4768 InstanceKlass* k = vmClasses::System_klass();
4769 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4770 }
4771
4772 #if INCLUDE_CDS
4773 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4774 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4775 }
4776 #endif
4777
4778 // Support for jdk_internal_misc_UnsafeConstants
4779 //
4780 class UnsafeConstantsFixup : public FieldClosure {
4781 private:
4782 int _address_size;
4783 int _page_size;
4784 bool _big_endian;
4785 bool _use_unaligned_access;
4786 int _data_cache_line_flush_size;
4787 public:
4788 UnsafeConstantsFixup() {
4789 // round up values for all static final fields
4790 _address_size = sizeof(void*);
4791 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4792 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4793 _use_unaligned_access = UseUnalignedAccesses;
4794 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4795 }
4796
4797 void do_field(fieldDescriptor* fd) {
4798 oop mirror = fd->field_holder()->java_mirror();
4799 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4800 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4801 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4802 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4803 if (fd->name() == vmSymbols::address_size_name()) {
4804 mirror->int_field_put(fd->offset(), _address_size);
4805 } else if (fd->name() == vmSymbols::page_size_name()) {
4806 mirror->int_field_put(fd->offset(), _page_size);
4807 } else if (fd->name() == vmSymbols::big_endian_name()) {
4808 mirror->bool_field_put(fd->offset(), _big_endian);
4809 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4810 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4811 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4812 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4813 } else {
4814 assert(false, "unexpected UnsafeConstants field");
4815 }
4816 }
4817 };
4818
4819 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4820 UnsafeConstantsFixup fixup;
4821 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4822 }
4823
4824
4825 // java_lang_StackTraceElement
4826
4827 int java_lang_StackTraceElement::_methodName_offset;
4828 int java_lang_StackTraceElement::_fileName_offset;
4829 int java_lang_StackTraceElement::_lineNumber_offset;
4830 int java_lang_StackTraceElement::_moduleName_offset;
4831 int java_lang_StackTraceElement::_moduleVersion_offset;
4832 int java_lang_StackTraceElement::_classLoaderName_offset;
4833 int java_lang_StackTraceElement::_declaringClass_offset;
4834 int java_lang_StackTraceElement::_declaringClassObject_offset;
4835
4836 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4837 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4838 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4839 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
4840 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4841 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
4842 macro(_methodName_offset, k, "methodName", string_signature, false); \
4843 macro(_fileName_offset, k, "fileName", string_signature, false); \
4844 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
4845
4846 // Support for java_lang_StackTraceElement
4847 void java_lang_StackTraceElement::compute_offsets() {
4848 InstanceKlass* k = vmClasses::StackTraceElement_klass();
4849 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4850 }
4851
4852 #if INCLUDE_CDS
4853 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4854 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4855 }
4856 #endif
4857
4858 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4859 element->obj_field_put(_fileName_offset, value);
4860 }
4861
4862 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4863 element->obj_field_put(_declaringClass_offset, value);
4864 }
4865
4866 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4867 element->obj_field_put(_methodName_offset, value);
4868 }
4869
4870 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4871 element->int_field_put(_lineNumber_offset, value);
4872 }
4873
4874 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4875 element->obj_field_put(_moduleName_offset, value);
4876 }
4877
4878 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4879 element->obj_field_put(_moduleVersion_offset, value);
4880 }
4881
4882 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4883 element->obj_field_put(_classLoaderName_offset, value);
4884 }
4885
4886 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4887 element->obj_field_put(_declaringClassObject_offset, value);
4888 }
4889
4890
4891 // java_lang_AssertionStatusDirectives
4892
4893 int java_lang_AssertionStatusDirectives::_classes_offset;
4894 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
4895 int java_lang_AssertionStatusDirectives::_packages_offset;
4896 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
4897 int java_lang_AssertionStatusDirectives::_deflt_offset;
4898
4899 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4900 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4901 macro(_classes_offset, k, "classes", string_array_signature, false); \
4902 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4903 macro(_packages_offset, k, "packages", string_array_signature, false); \
4904 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4905 macro(_deflt_offset, k, "deflt", bool_signature, false)
4906
4907 void java_lang_AssertionStatusDirectives::compute_offsets() {
4908 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
4909 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4910 }
4911
4912 #if INCLUDE_CDS
4913 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4914 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4915 }
4916 #endif
4917
4918 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4919 o->obj_field_put(_classes_offset, val);
4920 }
4921
4922 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4923 o->obj_field_put(_classEnabled_offset, val);
4924 }
4925
4926 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4927 o->obj_field_put(_packages_offset, val);
4928 }
4929
4930 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4931 o->obj_field_put(_packageEnabled_offset, val);
4932 }
4933
4934 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4935 o->bool_field_put(_deflt_offset, val);
4936 }
4937
4938 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4939
4940 #define AOS_FIELDS_DO(macro) \
4941 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4942
4943 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4944 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4945 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4946 }
4947
4948 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4949 assert(_owner_offset != 0, "Must be initialized");
4950 return obj->obj_field(_owner_offset);
4951 }
4952
4953 #if INCLUDE_CDS
4954 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4955 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4956 }
4957 #endif
4958
4959 int vector_VectorPayload::_payload_offset;
4960
4961 #define VECTORPAYLOAD_FIELDS_DO(macro) \
4962 macro(_payload_offset, k, "payload", object_signature, false)
4963
4964 void vector_VectorPayload::compute_offsets() {
4965 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
4966 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4967 }
4968
4969 #if INCLUDE_CDS
4970 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
4971 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4972 }
4973 #endif
4974
4975 void vector_VectorPayload::set_payload(oop o, oop val) {
4976 o->obj_field_put(_payload_offset, val);
4977 }
4978
4979 bool vector_VectorPayload::is_instance(oop obj) {
4980 return obj != nullptr && is_subclass(obj->klass());
4981 }
4982
4983 int java_lang_Integer_IntegerCache::_static_cache_offset;
4984 int java_lang_Long_LongCache::_static_cache_offset;
4985 int java_lang_Character_CharacterCache::_static_cache_offset;
4986 int java_lang_Short_ShortCache::_static_cache_offset;
4987 int java_lang_Byte_ByteCache::_static_cache_offset;
4988
4989 #define INTEGER_CACHE_FIELDS_DO(macro) \
4990 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
4991
4992 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
4993 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
4994 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4995 }
4996
4997 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
4998 oop base = ik->static_field_base_raw();
4999 return objArrayOop(base->obj_field(_static_cache_offset));
5000 }
5001
5002 Symbol* java_lang_Integer_IntegerCache::symbol() {
5003 return vmSymbols::java_lang_Integer_IntegerCache();
5004 }
5005
5006 #if INCLUDE_CDS
5007 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5008 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5009 }
5010 #endif
5011 #undef INTEGER_CACHE_FIELDS_DO
5012
5013 jint java_lang_Integer::value(oop obj) {
5014 jvalue v;
5015 java_lang_boxing_object::get_value(obj, &v);
5016 return v.i;
5017 }
5018
5019 #define LONG_CACHE_FIELDS_DO(macro) \
5020 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5021
5022 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5023 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5024 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5025 }
5026
5027 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5028 oop base = ik->static_field_base_raw();
5029 return objArrayOop(base->obj_field(_static_cache_offset));
5030 }
5031
5032 Symbol* java_lang_Long_LongCache::symbol() {
5033 return vmSymbols::java_lang_Long_LongCache();
5034 }
5035
5036 #if INCLUDE_CDS
5037 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5038 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5039 }
5040 #endif
5041 #undef LONG_CACHE_FIELDS_DO
5042
5043 jlong java_lang_Long::value(oop obj) {
5044 jvalue v;
5045 java_lang_boxing_object::get_value(obj, &v);
5046 return v.j;
5047 }
5048
5049 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5050 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5051
5052 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5053 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5054 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5055 }
5056
5057 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5058 oop base = ik->static_field_base_raw();
5059 return objArrayOop(base->obj_field(_static_cache_offset));
5060 }
5061
5062 Symbol* java_lang_Character_CharacterCache::symbol() {
5063 return vmSymbols::java_lang_Character_CharacterCache();
5064 }
5065
5066 #if INCLUDE_CDS
5067 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5068 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5069 }
5070 #endif
5071 #undef CHARACTER_CACHE_FIELDS_DO
5072
5073 jchar java_lang_Character::value(oop obj) {
5074 jvalue v;
5075 java_lang_boxing_object::get_value(obj, &v);
5076 return v.c;
5077 }
5078
5079 #define SHORT_CACHE_FIELDS_DO(macro) \
5080 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5081
5082 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5083 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5084 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5085 }
5086
5087 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5088 oop base = ik->static_field_base_raw();
5089 return objArrayOop(base->obj_field(_static_cache_offset));
5090 }
5091
5092 Symbol* java_lang_Short_ShortCache::symbol() {
5093 return vmSymbols::java_lang_Short_ShortCache();
5094 }
5095
5096 #if INCLUDE_CDS
5097 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5098 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5099 }
5100 #endif
5101 #undef SHORT_CACHE_FIELDS_DO
5102
5103 jshort java_lang_Short::value(oop obj) {
5104 jvalue v;
5105 java_lang_boxing_object::get_value(obj, &v);
5106 return v.s;
5107 }
5108
5109 #define BYTE_CACHE_FIELDS_DO(macro) \
5110 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5111
5112 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5113 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5114 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5115 }
5116
5117 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5118 oop base = ik->static_field_base_raw();
5119 return objArrayOop(base->obj_field(_static_cache_offset));
5120 }
5121
5122 Symbol* java_lang_Byte_ByteCache::symbol() {
5123 return vmSymbols::java_lang_Byte_ByteCache();
5124 }
5125
5126 #if INCLUDE_CDS
5127 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5128 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5129 }
5130 #endif
5131 #undef BYTE_CACHE_FIELDS_DO
5132
5133 jbyte java_lang_Byte::value(oop obj) {
5134 jvalue v;
5135 java_lang_boxing_object::get_value(obj, &v);
5136 return v.b;
5137 }
5138
5139 int java_lang_Boolean::_static_TRUE_offset;
5140 int java_lang_Boolean::_static_FALSE_offset;
5141
5142 #define BOOLEAN_FIELDS_DO(macro) \
5143 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5144 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5145
5146
5147 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5148 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5149 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5150 }
5151
5152 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5153 oop base = ik->static_field_base_raw();
5154 return base->obj_field(_static_TRUE_offset);
5155 }
5156
5157 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5158 oop base = ik->static_field_base_raw();
5159 return base->obj_field(_static_FALSE_offset);
5160 }
5161
5162 Symbol* java_lang_Boolean::symbol() {
5163 return vmSymbols::java_lang_Boolean();
5164 }
5165
5166 #if INCLUDE_CDS
5167 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5168 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5169 }
5170 #endif
5171 #undef BOOLEAN_CACHE_FIELDS_DO
5172
5173 jboolean java_lang_Boolean::value(oop obj) {
5174 jvalue v;
5175 java_lang_boxing_object::get_value(obj, &v);
5176 return v.z;
5177 }
5178
5179 // java_lang_reflect_RecordComponent
5180
5181 int java_lang_reflect_RecordComponent::_clazz_offset;
5182 int java_lang_reflect_RecordComponent::_name_offset;
5183 int java_lang_reflect_RecordComponent::_type_offset;
5184 int java_lang_reflect_RecordComponent::_accessor_offset;
5185 int java_lang_reflect_RecordComponent::_signature_offset;
5186 int java_lang_reflect_RecordComponent::_annotations_offset;
5187 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5188
5189 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5190 macro(_clazz_offset, k, "clazz", class_signature, false); \
5191 macro(_name_offset, k, "name", string_signature, false); \
5192 macro(_type_offset, k, "type", class_signature, false); \
5193 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5194 macro(_signature_offset, k, "signature", string_signature, false); \
5195 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5196 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5197
5198 // Support for java_lang_reflect_RecordComponent
5199 void java_lang_reflect_RecordComponent::compute_offsets() {
5200 InstanceKlass* k = vmClasses::RecordComponent_klass();
5201 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5202 }
5203
5204 #if INCLUDE_CDS
5205 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5206 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5207 }
5208 #endif
5209
5210 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5211 element->obj_field_put(_clazz_offset, value);
5212 }
5213
5214 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5215 element->obj_field_put(_name_offset, value);
5216 }
5217
5218 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5219 element->obj_field_put(_type_offset, value);
5220 }
5221
5222 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5223 element->obj_field_put(_accessor_offset, value);
5224 }
5225
5226 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5227 element->obj_field_put(_signature_offset, value);
5228 }
5229
5230 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5231 element->obj_field_put(_annotations_offset, value);
5232 }
5233
5234 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5235 element->obj_field_put(_typeAnnotations_offset, value);
5236 }
5237
5238 // java_lang_InternalError
5239 int java_lang_InternalError::_during_unsafe_access_offset;
5240
5241 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5242 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5243 }
5244
5245 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5246 return internal_error->bool_field(_during_unsafe_access_offset);
5247 }
5248
5249 void java_lang_InternalError::compute_offsets() {
5250 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5251 }
5252
5253 #if INCLUDE_CDS
5254 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5255 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5256 }
5257 #endif
5258
5259 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5260 f(java_lang_Class) \
5261 f(java_lang_String) \
5262 f(java_lang_ref_Reference) \
5263 //end
5264
5265 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5266 f(java_lang_System) \
5267 f(java_lang_ClassLoader) \
5268 f(java_lang_Throwable) \
5269 f(java_lang_Thread) \
5270 f(java_lang_Thread_FieldHolder) \
5271 f(java_lang_Thread_Constants) \
5272 f(java_lang_ThreadGroup) \
5273 f(java_lang_VirtualThread) \
5274 f(java_lang_InternalError) \
5275 f(java_lang_AssertionStatusDirectives) \
5276 f(java_lang_ref_SoftReference) \
5277 f(java_lang_invoke_MethodHandle) \
5278 f(java_lang_invoke_DirectMethodHandle) \
5279 f(java_lang_invoke_MemberName) \
5280 f(java_lang_invoke_ResolvedMethodName) \
5281 f(java_lang_invoke_LambdaForm) \
5282 f(java_lang_invoke_MethodType) \
5283 f(java_lang_invoke_CallSite) \
5284 f(java_lang_invoke_ConstantCallSite) \
5285 f(java_lang_reflect_AccessibleObject) \
5286 f(java_lang_reflect_Method) \
5287 f(java_lang_reflect_Constructor) \
5288 f(java_lang_reflect_Field) \
5289 f(java_lang_reflect_RecordComponent) \
5290 f(reflect_ConstantPool) \
5291 f(java_lang_reflect_Parameter) \
5292 f(java_lang_Module) \
5293 f(java_lang_StackTraceElement) \
5294 f(java_lang_ClassFrameInfo) \
5295 f(java_lang_StackFrameInfo) \
5296 f(java_lang_LiveStackFrameInfo) \
5297 f(jdk_internal_vm_ContinuationScope) \
5298 f(jdk_internal_vm_Continuation) \
5299 f(jdk_internal_vm_StackChunk) \
5300 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5301 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5302 f(jdk_internal_foreign_abi_ABIDescriptor) \
5303 f(jdk_internal_foreign_abi_VMStorage) \
5304 f(jdk_internal_foreign_abi_CallConv) \
5305 f(jdk_internal_misc_UnsafeConstants) \
5306 f(java_lang_boxing_object) \
5307 f(vector_VectorPayload) \
5308 //end
5309
5310 #define BASIC_JAVA_CLASSES_DO(f) \
5311 BASIC_JAVA_CLASSES_DO_PART1(f) \
5312 BASIC_JAVA_CLASSES_DO_PART2(f)
5313
5314 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5315
5316 // Compute field offsets of all the classes in this file
5317 void JavaClasses::compute_offsets() {
5318 if (CDSConfig::is_using_archive()) {
5319 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5320 JvmtiExport::has_early_class_hook_env()),
5321 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5322 // None of the classes used by the rest of this function can be replaced by
5323 // JVMTI ClassFileLoadHook.
5324 // We are safe to use the archived offsets, which have already been restored
5325 // by JavaClasses::serialize_offsets, without computing the offsets again.
5326 return;
5327 }
5328
5329 // We have already called the compute_offsets() of the
5330 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5331 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5332 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5333 }
5334
5335 #if INCLUDE_CDS
5336 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5337
5338 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5339 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5340 }
5341 #endif
5342
5343 #if INCLUDE_CDS_JAVA_HEAP
5344 bool JavaClasses::is_supported_for_archiving(oop obj) {
5345 Klass* klass = obj->klass();
5346
5347 if (!CDSConfig::is_dumping_method_handles()) {
5348 // These are supported by CDS only when CDSConfig::is_dumping_method_handles() is enabled.
5349 if (klass == vmClasses::ResolvedMethodName_klass() ||
5350 klass == vmClasses::MemberName_klass()) {
5351 return false;
5352 }
5353 }
5354
5355 if (!AOTReferenceObjSupport::is_enabled() && klass->is_subclass_of(vmClasses::Reference_klass())) {
5356 return false;
5357 }
5358
5359 return true;
5360 }
5361 #endif
5362
5363 #ifndef PRODUCT
5364
5365 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5366
5367 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5368 const char* field_sig) {
5369 EXCEPTION_MARK;
5370 fieldDescriptor fd;
5371 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5372 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5373 InstanceKlass* ik = InstanceKlass::cast(k);
5374 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5375 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5376 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5377 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5378 return false;
5379 }
5380 if (fd.is_static()) {
5381 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5382 return false;
5383 }
5384 if (fd.offset() == deserialized_offset ) {
5385 return true;
5386 } else {
5387 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5388 klass_name, field_name, deserialized_offset, fd.offset());
5389 return false;
5390 }
5391 }
5392
5393 void JavaClasses::check_offsets() {
5394 bool valid = true;
5395
5396 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5397 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5398
5399 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5400 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5401
5402 // Boxed primitive objects (java_lang_boxing_object)
5403
5404 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
5405 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5406 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
5407 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5408 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
5409 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
5410 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
5411 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5412
5413 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5414 }
5415
5416 #endif // PRODUCT
5417
5418 int InjectedField::compute_offset() {
5419 InstanceKlass* ik = klass();
5420 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5421 if (!may_be_java && !fs.field_flags().is_injected()) {
5422 // Only look at injected fields
5423 continue;
5424 }
5425 if (fs.name() == name() && fs.signature() == signature()) {
5426 return fs.offset();
5427 }
5428 }
5429 ResourceMark rm;
5430 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)" : "");
5431 #ifndef PRODUCT
5432 ik->print();
5433 tty->print_cr("all fields:");
5434 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5435 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());
5436 }
5437 #endif //PRODUCT
5438 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5439 return -1;
5440 }
5441
5442 void javaClasses_init() {
5443 JavaClasses::compute_offsets();
5444 JavaClasses::check_offsets();
5445 }