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