1 /*
2 * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "cds/aotMetaspace.hpp"
26 #include "cds/aotReferenceObjSupport.hpp"
27 #include "cds/archiveBuilder.hpp"
28 #include "cds/cdsConfig.hpp"
29 #include "cds/heapShared.inline.hpp"
30 #include "classfile/altHashing.hpp"
31 #include "classfile/classLoaderData.inline.hpp"
32 #include "classfile/javaClasses.inline.hpp"
33 #include "classfile/javaClassesImpl.hpp"
34 #include "classfile/javaThreadStatus.hpp"
35 #include "classfile/moduleEntry.hpp"
36 #include "classfile/stringTable.hpp"
37 #include "classfile/symbolTable.hpp"
38 #include "classfile/systemDictionary.hpp"
39 #include "classfile/vmClasses.hpp"
40 #include "classfile/vmSymbols.hpp"
41 #include "code/debugInfo.hpp"
42 #include "code/dependencyContext.hpp"
43 #include "code/pcDesc.hpp"
44 #include "gc/shared/collectedHeap.inline.hpp"
45 #include "interpreter/interpreter.hpp"
46 #include "interpreter/linkResolver.hpp"
47 #include "jvm.h"
48 #include "logging/log.hpp"
49 #include "logging/logStream.hpp"
50 #include "memory/oopFactory.hpp"
51 #include "memory/resourceArea.hpp"
52 #include "memory/universe.hpp"
53 #include "oops/fieldInfo.hpp"
54 #include "oops/fieldStreams.inline.hpp"
55 #include "oops/flatArrayKlass.hpp"
56 #include "oops/inlineKlass.inline.hpp"
57 #include "oops/instanceKlass.inline.hpp"
58 #include "oops/instanceMirrorKlass.inline.hpp"
59 #include "oops/klass.inline.hpp"
60 #include "oops/method.inline.hpp"
61 #include "oops/objArrayKlass.hpp"
62 #include "oops/objArrayOop.inline.hpp"
63 #include "oops/oop.inline.hpp"
64 #include "oops/oopCast.inline.hpp"
65 #include "oops/recordComponent.hpp"
66 #include "oops/symbol.hpp"
67 #include "oops/typeArrayOop.inline.hpp"
68 #include "prims/jvmtiExport.hpp"
69 #include "prims/methodHandles.hpp"
70 #include "prims/resolvedMethodTable.hpp"
71 #include "runtime/continuationEntry.inline.hpp"
72 #include "runtime/continuationJavaClasses.inline.hpp"
73 #include "runtime/fieldDescriptor.inline.hpp"
74 #include "runtime/frame.inline.hpp"
75 #include "runtime/handles.inline.hpp"
76 #include "runtime/handshake.hpp"
77 #include "runtime/init.hpp"
78 #include "runtime/interfaceSupport.inline.hpp"
79 #include "runtime/java.hpp"
80 #include "runtime/javaCalls.hpp"
81 #include "runtime/javaThread.hpp"
82 #include "runtime/jniHandles.inline.hpp"
83 #include "runtime/reflection.hpp"
84 #include "runtime/safepoint.hpp"
85 #include "runtime/safepointVerifiers.hpp"
86 #include "runtime/threadSMR.hpp"
87 #include "runtime/vframe.inline.hpp"
88 #include "runtime/vm_version.hpp"
89 #include "utilities/align.hpp"
90 #include "utilities/globalDefinitions.hpp"
91 #include "utilities/growableArray.hpp"
92 #include "utilities/preserveException.hpp"
93 #include "utilities/utf8.hpp"
94 #if INCLUDE_JVMCI
95 #include "jvmci/jvmciJavaClasses.hpp"
96 #endif
97
98 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
99 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
100
101 InjectedField JavaClasses::_injected_fields[] = {
102 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
103 };
104
105 // Register native methods of Object
106 void java_lang_Object::register_natives(TRAPS) {
107 InstanceKlass* obj = vmClasses::Object_klass();
108 Method::register_native(obj, vmSymbols::hashCode_name(),
109 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
110 Method::register_native(obj, vmSymbols::wait_name(),
111 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
112 Method::register_native(obj, vmSymbols::notify_name(),
113 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
114 Method::register_native(obj, vmSymbols::notifyAll_name(),
115 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
116 Method::register_native(obj, vmSymbols::clone_name(),
117 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
118 }
119
120 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
121 return _injected_fields[(int)id].compute_offset();
122 }
123
124 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
125 *field_count = 0;
126
127 vmSymbolID sid = vmSymbols::find_sid(class_name);
128 if (sid == vmSymbolID::NO_SID) {
129 // Only well known classes can inject fields
130 return nullptr;
131 }
132
133 int count = 0;
134 int start = -1;
135
136 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
137 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \
138 count++; \
139 if (start == -1) { \
140 start = (int)InjectedFieldID::klass##_##name##_enum; \
141 } \
142 }
143 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
144 #undef LOOKUP_INJECTED_FIELD
145
146 if (start != -1) {
147 *field_count = count;
148 return _injected_fields + start;
149 }
150 return nullptr;
151 }
152
153
154 // Helpful routine for computing field offsets at run time rather than hardcoding them
155 // Finds local fields only, including static fields. Static field offsets are from the
156 // beginning of the mirror.
157 void JavaClasses::compute_offset(int &dest_offset,
158 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
159 bool is_static) {
160 fieldDescriptor fd;
161 if (ik == nullptr) {
162 ResourceMark rm;
163 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
164 vm_exit_during_initialization("Invalid layout of well-known class");
165 }
166
167 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
168 ResourceMark rm;
169 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
170 name_symbol->as_C_string(), signature_symbol->as_C_string());
171 #ifndef PRODUCT
172 // Prints all fields and offsets
173 Log(class) lt;
174 LogStream ls(lt.error());
175 ik->print_on(&ls);
176 #endif //PRODUCT
177 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
178 }
179 dest_offset = fd.offset();
180 }
181
182 // Overloading to pass name as a string.
183 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
184 const char* name_string, Symbol* signature_symbol,
185 bool is_static) {
186 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
187 if (name == nullptr) {
188 ResourceMark rm;
189 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
190 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
191 }
192 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
193 }
194
195 // java_lang_String
196
197 int java_lang_String::_value_offset;
198 int java_lang_String::_hash_offset;
199 int java_lang_String::_hashIsZero_offset;
200 int java_lang_String::_coder_offset;
201 int java_lang_String::_flags_offset;
202
203 bool java_lang_String::_initialized;
204
205
206 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
207 uint8_t* addr = flags_addr(java_string);
208 uint8_t value = AtomicAccess::load(addr);
209 while ((value & flag_mask) == 0) {
210 uint8_t old_value = value;
211 value |= flag_mask;
212 value = AtomicAccess::cmpxchg(addr, old_value, value);
213 if (value == old_value) return false; // Flag bit changed from 0 to 1.
214 }
215 return true; // Flag bit is already 1.
216 }
217
218 #define STRING_FIELDS_DO(macro) \
219 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
220 macro(_hash_offset, k, "hash", int_signature, false); \
221 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
222 macro(_coder_offset, k, "coder", byte_signature, false);
223
224 void java_lang_String::compute_offsets() {
225 if (_initialized) {
226 return;
227 }
228
229 InstanceKlass* k = vmClasses::String_klass();
230 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
231 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
232
233 _initialized = true;
234 }
235
236 #if INCLUDE_CDS
237 void java_lang_String::serialize_offsets(SerializeClosure* f) {
238 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
239 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
240 f->do_bool(&_initialized);
241 }
242 #endif
243
244 class CompactStringsFixup : public FieldClosure {
245 private:
246 bool _value;
247
248 public:
249 CompactStringsFixup(bool value) : _value(value) {}
250
251 void do_field(fieldDescriptor* fd) {
252 if (fd->name() == vmSymbols::compact_strings_name()) {
253 oop mirror = fd->field_holder()->java_mirror();
254 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String");
255 assert(mirror != nullptr, "String must have mirror already");
256 mirror->bool_field_put(fd->offset(), _value);
257 }
258 }
259 };
260
261 void java_lang_String::set_compact_strings(bool value) {
262 CompactStringsFixup fix(value);
263 vmClasses::String_klass()->do_local_static_fields(&fix);
264 }
265
266 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
267 assert(_initialized, "Must be initialized");
268 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
269
270 // Create the String object first, so there's a chance that the String
271 // and the char array it points to end up in the same cache line.
272 oop obj;
273 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH);
274
275 // Create the char array. The String object must be handlized here
276 // because GC can happen as a result of the allocation attempt.
277 Handle h_obj(THREAD, obj);
278 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
279 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
280
281 // Point the String at the char array
282 obj = h_obj();
283 set_value(obj, buffer);
284 // No need to zero the offset, allocation zero'ed the entire String object
285 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
286 return h_obj;
287 }
288
289 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
290 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
291 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
292 typeArrayOop buffer = value(h_obj());
293 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
294 if (is_latin1) {
295 for (int index = 0; index < length; index++) {
296 buffer->byte_at_put(index, (jbyte)unicode[index]);
297 }
298 } else {
299 for (int index = 0; index < length; index++) {
300 buffer->char_at_put(index, unicode[index]);
301 }
302 }
303
304 #ifdef ASSERT
305 {
306 ResourceMark rm;
307 size_t utf8_len = static_cast<size_t>(length);
308 char* expected = UNICODE::as_utf8(unicode, utf8_len);
309 char* actual = as_utf8_string(h_obj());
310 if (strcmp(expected, actual) != 0) {
311 fatal("Unicode conversion failure: %s --> %s", expected, actual);
312 }
313 }
314 #endif
315
316 return h_obj;
317 }
318
319 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
320 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
321 return h_obj();
322 }
323
324 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
325 if (utf8_str == nullptr) {
326 return Handle();
327 }
328 bool has_multibyte, is_latin1;
329 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
330 if (!CompactStrings) {
331 has_multibyte = true;
332 is_latin1 = false;
333 }
334
335 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
336 if (length > 0) {
337 if (!has_multibyte) {
338 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
339 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
340 } else if (is_latin1) {
341 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
342 } else {
343 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
344 }
345 }
346
347 #ifdef ASSERT
348 // This check is too strict when the input string is not a valid UTF8.
349 // For example, it may be created with arbitrary content via jni_NewStringUTF.
350 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, strlen(utf8_str), /*version_leq_47*/false)) {
351 ResourceMark rm;
352 const char* expected = utf8_str;
353 char* actual = as_utf8_string(h_obj());
354 if (strcmp(expected, actual) != 0) {
355 fatal("String conversion failure: %s --> %s", expected, actual);
356 }
357 }
358 #endif
359
360 return h_obj;
361 }
362
363 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
364 Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
365 return h_obj();
366 }
367
368 Handle java_lang_String::create_from_symbol(const Symbol* symbol, TRAPS) {
369 const char* utf8_str = (char*)symbol->bytes();
370 int utf8_len = symbol->utf8_length();
371
372 bool has_multibyte, is_latin1;
373 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
374 if (!CompactStrings) {
375 has_multibyte = true;
376 is_latin1 = false;
377 }
378
379 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
380 if (length > 0) {
381 if (!has_multibyte) {
382 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
383 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
384 } else if (is_latin1) {
385 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
386 } else {
387 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
388 }
389 }
390
391 #ifdef ASSERT
392 // This check is too strict on older classfile versions
393 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, utf8_len, /*version_leq_47*/false))
394 {
395 ResourceMark rm;
396 const char* expected = symbol->as_utf8();
397 char* actual = as_utf8_string(h_obj());
398 if (strncmp(expected, actual, utf8_len) != 0) {
399 fatal("Symbol conversion failure: %s --> %s", expected, actual);
400 }
401 }
402 #endif
403
404 return h_obj;
405 }
406
407 // Converts a C string to a Java String based on current encoding
408 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
409 assert(str != nullptr, "bad arguments");
410
411 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
412 static to_java_string_fn_t _to_java_string_fn = nullptr;
413
414 if (_to_java_string_fn == nullptr) {
415 void *lib_handle = os::native_java_library();
416 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
417 if (_to_java_string_fn == nullptr) {
418 fatal("JNU_NewStringPlatform missing");
419 }
420 }
421
422 jstring js = nullptr;
423 {
424 JavaThread* thread = THREAD;
425 HandleMark hm(thread);
426 ThreadToNativeFromVM ttn(thread);
427 js = (_to_java_string_fn)(thread->jni_environment(), str);
428 }
429
430 Handle native_platform_string(THREAD, JNIHandles::resolve(js));
431 JNIHandles::destroy_local(js); // destroy local JNIHandle.
432 return native_platform_string;
433 }
434
435 // Converts a Java String to a native C string that can be used for
436 // native OS calls.
437 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
438 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
439 static to_platform_string_fn_t _to_platform_string_fn = nullptr;
440
441 if (_to_platform_string_fn == nullptr) {
442 void *lib_handle = os::native_java_library();
443 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
444 if (_to_platform_string_fn == nullptr) {
445 fatal("GetStringPlatformChars missing");
446 }
447 }
448
449 char *native_platform_string;
450 jstring js;
451 { JavaThread* thread = THREAD;
452 js = (jstring) JNIHandles::make_local(thread, java_string());
453 HandleMark hm(thread);
454 ThreadToNativeFromVM ttn(thread);
455 JNIEnv *env = thread->jni_environment();
456 bool is_copy;
457 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
458 assert(is_copy == JNI_TRUE, "is_copy value changed");
459 }
460
461 // Uses a store barrier and therefore needs to be in vm state
462 JNIHandles::destroy_local(js);
463
464 return native_platform_string;
465 }
466
467 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
468 ResourceMark rm(THREAD);
469 return create_from_str(java_name->as_klass_external_name(), THREAD);
470 }
471
472 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
473 jchar* result = as_unicode_string_or_null(java_string, length);
474 if (result == nullptr) {
475 THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
476 }
477 return result;
478 }
479
480 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
481 typeArrayOop value = java_lang_String::value(java_string);
482 length = java_lang_String::length(java_string, value);
483 bool is_latin1 = java_lang_String::is_latin1(java_string);
484
485 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
486 if (result != nullptr) {
487 if (!is_latin1) {
488 for (int index = 0; index < length; index++) {
489 result[index] = value->char_at(index);
490 }
491 } else {
492 for (int index = 0; index < length; index++) {
493 result[index] = ((jchar) value->byte_at(index)) & 0xff;
494 }
495 }
496 }
497 return result;
498 }
499
500 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
501 // The hash and hashIsZero fields are subject to a benign data race,
502 // making it crucial to ensure that any observable result of the
503 // calculation in this method stays correct under any possible read of
504 // these fields. Necessary restrictions to allow this to be correct
505 // without explicit memory fences or similar concurrency primitives is
506 // that we can ever only write to one of these two fields for a given
507 // String instance, and that the computation is idempotent and derived
508 // from immutable state
509 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
510 if (java_lang_String::hash_is_set(java_string)) {
511 return java_string->int_field(_hash_offset);
512 }
513
514 typeArrayOop value = java_lang_String::value(java_string);
515 int length = java_lang_String::length(java_string, value);
516 bool is_latin1 = java_lang_String::is_latin1(java_string);
517
518 unsigned int hash = 0;
519 if (length > 0) {
520 if (is_latin1) {
521 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
522 } else {
523 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
524 }
525 }
526
527 if (update) {
528 if (hash != 0) {
529 java_string->int_field_put(_hash_offset, hash);
530 } else {
531 java_string->bool_field_put(_hashIsZero_offset, true);
532 }
533 }
534 return hash;
535 }
536
537 unsigned int java_lang_String::hash_code(oop java_string) {
538 return hash_code_impl(java_string, /*update=*/true);
539 }
540
541 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
542 return hash_code_impl(java_string, /*update=*/false);
543 }
544
545
546 char* java_lang_String::as_quoted_ascii(oop java_string) {
547 typeArrayOop value = java_lang_String::value(java_string);
548 int length = java_lang_String::length(java_string, value);
549 bool is_latin1 = java_lang_String::is_latin1(java_string);
550
551 if (length == 0) return nullptr;
552
553 char* result;
554 size_t result_length;
555 if (!is_latin1) {
556 jchar* base = value->char_at_addr(0);
557 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
558 result = NEW_RESOURCE_ARRAY(char, result_length);
559 UNICODE::as_quoted_ascii(base, length, result, result_length);
560 } else {
561 jbyte* base = value->byte_at_addr(0);
562 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
563 result = NEW_RESOURCE_ARRAY(char, result_length);
564 UNICODE::as_quoted_ascii(base, length, result, result_length);
565 }
566 assert(result_length >= (size_t)length + 1, "must not be shorter");
567 assert(result_length == strlen(result) + 1, "must match");
568 return result;
569 }
570
571 Symbol* java_lang_String::as_symbol(oop java_string) {
572 typeArrayOop value = java_lang_String::value(java_string);
573 int length = java_lang_String::length(java_string, value);
574 bool is_latin1 = java_lang_String::is_latin1(java_string);
575 if (!is_latin1) {
576 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
577 Symbol* sym = SymbolTable::new_symbol(base, length);
578 return sym;
579 } else {
580 ResourceMark rm;
581 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
582 size_t utf8_len = static_cast<size_t>(length);
583 const char* base = UNICODE::as_utf8(position, utf8_len);
584 Symbol* sym = SymbolTable::new_symbol(base, checked_cast<int>(utf8_len));
585 return sym;
586 }
587 }
588
589 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
590 typeArrayOop value = java_lang_String::value(java_string);
591 int length = java_lang_String::length(java_string, value);
592 bool is_latin1 = java_lang_String::is_latin1(java_string);
593 if (!is_latin1) {
594 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
595 return SymbolTable::probe_unicode(base, length);
596 } else {
597 ResourceMark rm;
598 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
599 size_t utf8_len = static_cast<size_t>(length);
600 const char* base = UNICODE::as_utf8(position, utf8_len);
601 return SymbolTable::probe(base, checked_cast<int>(utf8_len));
602 }
603 }
604
605 size_t java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
606 assert(value_equals(value, java_lang_String::value(java_string)),
607 "value must be same as java_lang_String::value(java_string)");
608 int length = java_lang_String::length(java_string, value);
609 if (length == 0) {
610 return 0;
611 }
612 if (!java_lang_String::is_latin1(java_string)) {
613 return UNICODE::utf8_length(value->char_at_addr(0), length);
614 } else {
615 return UNICODE::utf8_length(value->byte_at_addr(0), length);
616 }
617 }
618
619 size_t java_lang_String::utf8_length(oop java_string) {
620 typeArrayOop value = java_lang_String::value(java_string);
621 return utf8_length(java_string, value);
622 }
623
624 int java_lang_String::utf8_length_as_int(oop java_string) {
625 typeArrayOop value = java_lang_String::value(java_string);
626 return utf8_length_as_int(java_string, value);
627 }
628
629 int java_lang_String::utf8_length_as_int(oop java_string, typeArrayOop value) {
630 assert(value_equals(value, java_lang_String::value(java_string)),
631 "value must be same as java_lang_String::value(java_string)");
632 int length = java_lang_String::length(java_string, value);
633 if (length == 0) {
634 return 0;
635 }
636 if (!java_lang_String::is_latin1(java_string)) {
637 return UNICODE::utf8_length_as_int(value->char_at_addr(0), length);
638 } else {
639 return UNICODE::utf8_length_as_int(value->byte_at_addr(0), length);
640 }
641 }
642
643 char* java_lang_String::as_utf8_string(oop java_string) {
644 size_t length;
645 return as_utf8_string(java_string, length);
646 }
647
648 char* java_lang_String::as_utf8_string(oop java_string, size_t& length) {
649 typeArrayOop value = java_lang_String::value(java_string);
650 // `length` is used as the incoming number of characters to
651 // convert, and then set as the number of bytes in the UTF8 sequence.
652 length = java_lang_String::length(java_string, value);
653 bool is_latin1 = java_lang_String::is_latin1(java_string);
654 if (!is_latin1) {
655 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
656 return UNICODE::as_utf8(position, length);
657 } else {
658 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
659 return UNICODE::as_utf8(position, length);
660 }
661 }
662
663 // Uses a provided buffer if it's sufficiently large, otherwise allocates
664 // a resource array to fit
665 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& utf8_len) {
666 typeArrayOop value = java_lang_String::value(java_string);
667 int len = java_lang_String::length(java_string, value);
668 bool is_latin1 = java_lang_String::is_latin1(java_string);
669 if (!is_latin1) {
670 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
671 utf8_len = UNICODE::utf8_length(position, len);
672 if (utf8_len >= buflen) {
673 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
674 }
675 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
676 } else {
677 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
678 utf8_len = UNICODE::utf8_length(position, len);
679 if (utf8_len >= buflen) {
680 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
681 }
682 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
683 }
684 }
685
686 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen) {
687 assert(value_equals(value, java_lang_String::value(java_string)),
688 "value must be same as java_lang_String::value(java_string)");
689 int length = java_lang_String::length(java_string, value);
690 bool is_latin1 = java_lang_String::is_latin1(java_string);
691 if (!is_latin1) {
692 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
693 return UNICODE::as_utf8(position, length, buf, buflen);
694 } else {
695 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
696 return UNICODE::as_utf8(position, length, buf, buflen);
697 }
698 }
699
700 char* java_lang_String::as_utf8_string(oop java_string, char* buf, size_t buflen) {
701 typeArrayOop value = java_lang_String::value(java_string);
702 return as_utf8_string(java_string, value, buf, buflen);
703 }
704
705 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
706 // `length` is used as the incoming number of characters to
707 // convert, and then set as the number of bytes in the UTF8 sequence.
708 size_t length = static_cast<size_t>(len);
709 typeArrayOop value = java_lang_String::value(java_string);
710 bool is_latin1 = java_lang_String::is_latin1(java_string);
711 assert(start + len <= java_lang_String::length(java_string), "just checking");
712 if (!is_latin1) {
713 jchar* position = value->char_at_addr(start);
714 return UNICODE::as_utf8(position, length);
715 } else {
716 jbyte* position = value->byte_at_addr(start);
717 return UNICODE::as_utf8(position, length);
718 }
719 }
720
721 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen) {
722 assert(value_equals(value, java_lang_String::value(java_string)),
723 "value must be same as java_lang_String::value(java_string)");
724 assert(start + len <= java_lang_String::length(java_string), "just checking");
725 bool is_latin1 = java_lang_String::is_latin1(java_string);
726 if (!is_latin1) {
727 jchar* position = value->char_at_addr(start);
728 return UNICODE::as_utf8(position, len, buf, buflen);
729 } else {
730 jbyte* position = value->byte_at_addr(start);
731 return UNICODE::as_utf8(position, len, buf, buflen);
732 }
733 }
734
735 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
736 assert(java_string->klass() == vmClasses::String_klass(),
737 "must be java_string");
738 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
739 int length = java_lang_String::length(java_string, value);
740 if (length != len) {
741 return false;
742 }
743 bool is_latin1 = java_lang_String::is_latin1(java_string);
744 if (!is_latin1) {
745 for (int i = 0; i < len; i++) {
746 if (value->char_at(i) != chars[i]) {
747 return false;
748 }
749 }
750 } else {
751 for (int i = 0; i < len; i++) {
752 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
753 return false;
754 }
755 }
756 }
757 return true;
758 }
759
760 bool java_lang_String::equals(oop java_string, const char* utf8_string, size_t utf8_len) {
761 assert(java_string->klass() == vmClasses::String_klass(),
762 "must be java_string");
763 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
764 int length = java_lang_String::length(java_string, value);
765 int unicode_length = UTF8::unicode_length(utf8_string, utf8_len);
766 if (length != unicode_length) {
767 return false;
768 }
769 bool is_latin1 = java_lang_String::is_latin1(java_string);
770 jchar c;
771 if (!is_latin1) {
772 for (int i = 0; i < unicode_length; i++) {
773 utf8_string = UTF8::next(utf8_string, &c);
774 if (value->char_at(i) != c) {
775 return false;
776 }
777 }
778 } else {
779 for (int i = 0; i < unicode_length; i++) {
780 utf8_string = UTF8::next(utf8_string, &c);
781 if ((((jchar) value->byte_at(i)) & 0xff) != c) {
782 return false;
783 }
784 }
785 }
786 return true;
787 }
788
789 bool java_lang_String::equals(oop str1, oop str2) {
790 assert(str1->klass() == vmClasses::String_klass(),
791 "must be java String");
792 assert(str2->klass() == vmClasses::String_klass(),
793 "must be java String");
794 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
795 bool is_latin1 = java_lang_String::is_latin1(str1);
796 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
797 bool is_latin2 = java_lang_String::is_latin1(str2);
798
799 if (is_latin1 != is_latin2) {
800 // Strings with different coders are never equal.
801 return false;
802 }
803 return value_equals(value1, value2);
804 }
805
806 // Print the given string to the given outputStream, limiting the output to
807 // at most max_length of the string's characters. If the length exceeds the
808 // limit we print an abridged version of the string with the "middle" elided
809 // and replaced by " ... (N characters ommitted) ... ". If max_length is odd
810 // it is treated as max_length-1.
811 void java_lang_String::print(oop java_string, outputStream* st, int max_length) {
812 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
813 // We need at least two characters to print A ... B
814 assert(max_length > 1, "invalid max_length: %d", max_length);
815
816 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
817
818 if (value == nullptr) {
819 // This can happen if, e.g., printing a String
820 // object before its initializer has been called
821 st->print("nullptr");
822 return;
823 }
824
825 int length = java_lang_String::length(java_string, value);
826 bool is_latin1 = java_lang_String::is_latin1(java_string);
827
828 bool abridge = length > max_length;
829
830 st->print("\"");
831 for (int index = 0; index < length; index++) {
832 // If we need to abridge and we've printed half the allowed characters
833 // then jump to the tail of the string.
834 if (abridge && index >= max_length / 2) {
835 st->print(" ... (%d characters ommitted) ... ", length - 2 * (max_length / 2));
836 index = length - (max_length / 2);
837 abridge = false; // only do this once
838 }
839 jchar c = (!is_latin1) ? value->char_at(index) :
840 ((jchar) value->byte_at(index)) & 0xff;
841 if (c < ' ') {
842 st->print("\\x%02X", c); // print control characters e.g. \x0A
843 } else {
844 st->print("%c", c);
845 }
846 }
847 st->print("\"");
848
849 if (length > max_length) {
850 st->print(" (abridged) ");
851 }
852 }
853
854 // java_lang_Class
855
856 int java_lang_Class::_klass_offset;
857 int java_lang_Class::_array_klass_offset;
858 int java_lang_Class::_oop_size_offset;
859 int java_lang_Class::_static_oop_field_count_offset;
860 int java_lang_Class::_class_loader_offset;
861 int java_lang_Class::_module_offset;
862 int java_lang_Class::_protection_domain_offset;
863 int java_lang_Class::_component_mirror_offset;
864 int java_lang_Class::_init_lock_offset;
865 int java_lang_Class::_signers_offset;
866 int java_lang_Class::_name_offset;
867 int java_lang_Class::_source_file_offset;
868 int java_lang_Class::_classData_offset;
869 int java_lang_Class::_classRedefinedCount_offset;
870 int java_lang_Class::_reflectionData_offset;
871 int java_lang_Class::_modifiers_offset;
872 int java_lang_Class::_is_primitive_offset;
873 int java_lang_Class::_is_identity_offset;
874 int java_lang_Class::_raw_access_flags_offset;
875
876 bool java_lang_Class::_offsets_computed = false;
877 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
878 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
879
880 #ifdef ASSERT
881 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
882 assert(fd->has_initial_value(), "caller should have checked this");
883 assert(fd->field_type() == T_OBJECT, "caller should have checked this");
884 assert(fd->signature() == vmSymbols::string_signature(), "just checking");
885 }
886 #endif
887
888 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
889 DEBUG_ONLY(assert_valid_static_string_field(fd);)
890 oop string = fd->string_initial_value(CHECK);
891 mirror()->obj_field_put(fd->offset(), string);
892 }
893
894 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
895 assert(fd->has_initial_value(), "caller should have checked this");
896 BasicType t = fd->field_type();
897 switch (t) {
898 case T_BYTE:
899 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value()));
900 break;
901 case T_BOOLEAN:
902 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value()));
903 break;
904 case T_CHAR:
905 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value()));
906 break;
907 case T_SHORT:
908 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value()));
909 break;
910 case T_INT:
911 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
912 break;
913 case T_FLOAT:
914 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
915 break;
916 case T_DOUBLE:
917 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
918 break;
919 case T_LONG:
920 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
921 break;
922 default:
923 // Illegal ConstantValue attribute in class file should have been
924 // caught during classfile parsing.
925 ShouldNotReachHere();
926 }
927 }
928
929 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
930 assert(mirror.not_null() && fd->is_static(), "just checking");
931 if (fd->has_initial_value()) {
932 if (fd->field_type() != T_OBJECT) {
933 initialize_static_primitive_field(fd, mirror);
934 } else {
935 initialize_static_string_field(fd, mirror, CHECK);
936 }
937 }
938 }
939
940 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
941 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
942
943 // If the offset was read from the shared archive, it was fixed up already
944 if (!k->in_aot_cache()) {
945 if (k->is_instance_klass()) {
946 // During bootstrap, java.lang.Class wasn't loaded so static field
947 // offsets were computed without the size added it. Go back and
948 // update all the static field offsets to included the size.
949
950 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
951 // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
952 // static fields offsets are updated in this array before reencoding everything into
953 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
954
955 int java_fields;
956 int injected_fields;
957 InstanceKlass* ik = InstanceKlass::cast(k);
958 GrowableArray<FieldInfo>* fields =
959 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
960 &java_fields, &injected_fields);
961 for (int i = 0; i < fields->length(); i++) {
962 FieldInfo* fi = fields->adr_at(i);
963 if (fi->access_flags().is_static()) {
964 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
965 }
966 }
967 Array<u1>* old_stream = ik->fieldinfo_stream();
968 assert(fields->length() == (java_fields + injected_fields), "Must be");
969 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
970 ik->set_fieldinfo_stream(new_fis);
971 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
972
973 Array<u1>* old_table = ik->fieldinfo_search_table();
974 Array<u1>* search_table = FieldInfoStream::create_search_table(ik->constants(), new_fis, k->class_loader_data(), CHECK);
975 ik->set_fieldinfo_search_table(search_table);
976 MetadataFactory::free_array<u1>(k->class_loader_data(), old_table);
977
978 DEBUG_ONLY(FieldInfoStream::validate_search_table(ik->constants(), new_fis, search_table));
979 }
980 }
981
982 if (k->in_aot_cache() && k->has_archived_mirror_index()) {
983 if (HeapShared::is_archived_heap_in_use()) {
984 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
985 assert(present, "Missing archived mirror for %s", k->external_name());
986 return;
987 } else {
988 k->clear_java_mirror_handle();
989 k->clear_archived_mirror_index();
990 }
991 }
992 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
993 }
994
995 void java_lang_Class::initialize_mirror_fields(InstanceKlass* ik,
996 Handle mirror,
997 Handle protection_domain,
998 Handle classData,
999 TRAPS) {
1000 // Allocate a simple java object for a lock.
1001 // This needs to be a java object because during class initialization
1002 // it can be held across a java call.
1003 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
1004 set_init_lock(mirror(), r);
1005
1006 // Set protection domain also
1007 set_protection_domain(mirror(), protection_domain());
1008
1009 // Initialize static fields
1010 ik->do_local_static_fields(&initialize_static_field, mirror, CHECK);
1011
1012 // Set classData
1013 set_class_data(mirror(), classData());
1014 }
1015
1016 // Set the java.lang.Module module field in the java_lang_Class mirror
1017 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
1018 if (CDSConfig::is_using_aot_linked_classes()) {
1019 oop archived_module = java_lang_Class::module(mirror());
1020 if (archived_module != nullptr) {
1021 precond(module() == nullptr || module() == archived_module);
1022 precond(AOTMetaspace::in_aot_cache_static_region((void*)k));
1023 return;
1024 }
1025 }
1026
1027 if (module.is_null()) {
1028 // During startup, the module may be null only if java.base has not been defined yet.
1029 // Put the class on the fixup_module_list to patch later when the java.lang.Module
1030 // for java.base is known. But note that since we captured the null module another
1031 // thread may have completed that initialization.
1032
1033 // With AOT-linked classes, java.base should have been defined before the
1034 // VM loads any classes.
1035 precond(!CDSConfig::is_using_aot_linked_classes());
1036
1037 bool javabase_was_defined = false;
1038 {
1039 MutexLocker m1(current, Module_lock);
1040 // Keep list of classes needing java.base module fixup
1041 if (!ModuleEntryTable::javabase_defined()) {
1042 assert(k->java_mirror() != nullptr, "Class's mirror is null");
1043 k->class_loader_data()->inc_keep_alive_ref_count();
1044 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
1045 fixup_module_field_list()->push(k);
1046 } else {
1047 javabase_was_defined = true;
1048 }
1049 }
1050
1051 // If java.base was already defined then patch this particular class with java.base.
1052 if (javabase_was_defined) {
1053 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
1054 assert(javabase_entry != nullptr && javabase_entry->module_oop() != nullptr,
1055 "Setting class module field, " JAVA_BASE_NAME " should be defined");
1056 Handle javabase_handle(current, javabase_entry->module_oop());
1057 set_module(mirror(), javabase_handle());
1058 }
1059 } else {
1060 assert(Universe::is_module_initialized() ||
1061 (ModuleEntryTable::javabase_defined() &&
1062 (module() == ModuleEntryTable::javabase_moduleEntry()->module_oop())),
1063 "Incorrect java.lang.Module specification while creating mirror");
1064 set_module(mirror(), module());
1065 }
1066 }
1067
1068 // Statically allocate fixup lists because they always get created.
1069 void java_lang_Class::allocate_fixup_lists() {
1070 if (!CDSConfig::is_using_aot_linked_classes()) {
1071 // fixup_mirror_list() is not used when we have preloaded classes. See
1072 // Universe::fixup_mirrors().
1073 GrowableArray<Klass*>* mirror_list =
1074 new (mtClass) GrowableArray<Klass*>(40, mtClass);
1075 set_fixup_mirror_list(mirror_list);
1076
1077 // With AOT-linked classes, java.base module is defined before any class
1078 // is loaded, so there's no need for fixup_module_field_list().
1079 GrowableArray<Klass*>* module_list =
1080 new (mtModule) GrowableArray<Klass*>(500, mtModule);
1081 set_fixup_module_field_list(module_list);
1082 }
1083 }
1084
1085 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
1086 Handle& mirror, Handle& comp_mirror, TRAPS) {
1087 // Allocate mirror (java.lang.Class instance)
1088 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
1089 mirror = Handle(THREAD, mirror_oop);
1090
1091 // Setup indirection from mirror->klass
1092 set_klass(mirror(), k);
1093
1094 // Set the modifiers flag.
1095 u2 computed_modifiers = k->compute_modifier_flags();
1096 set_modifiers(mirror(), computed_modifiers);
1097 // Set the raw access_flags, this is used by reflection instead of modifier flags.
1098 // The Java code for array classes gets the access flags from the element type.
1099 assert(!k->is_array_klass() || k->access_flags().as_unsigned_short() == 0, "access flags are not set for arrays");
1100 set_raw_access_flags(mirror(), k->access_flags().as_unsigned_short());
1101 set_is_identity(mirror(), k->is_array_klass() || k->is_identity_class());
1102
1103 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
1104 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
1105
1106 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
1107
1108 // It might also have a component mirror. This mirror must already exist.
1109 if (k->is_array_klass()) {
1110 if (k->is_flatArray_klass()) {
1111 Klass* element_klass = (Klass*) FlatArrayKlass::cast(k)->element_klass();
1112 assert(element_klass->is_inline_klass(), "Must be inline type component");
1113 if (is_scratch) {
1114 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1115 } else {
1116 comp_mirror = Handle(THREAD, element_klass->java_mirror());
1117 }
1118 } else if (k->is_typeArray_klass()) {
1119 BasicType type = TypeArrayKlass::cast(k)->element_type();
1120 if (is_scratch) {
1121 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
1122 } else {
1123 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
1124 }
1125 } else {
1126 assert(k->is_objArray_klass(), "Must be");
1127 assert(!k->is_refArray_klass() || !k->is_flatArray_klass(), "Must not have mirror");
1128 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1129 assert(element_klass != nullptr, "Must have an element klass");
1130 oop comp_oop = element_klass->java_mirror();
1131 if (is_scratch) {
1132 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1133 } else {
1134 comp_mirror = Handle(THREAD, comp_oop);
1135 }
1136 }
1137 assert(comp_mirror() != nullptr, "must have a mirror");
1138
1139 // Two-way link between the array klass and its component mirror:
1140 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1141 set_component_mirror(mirror(), comp_mirror());
1142 // See below for ordering dependencies between field array_klass in component mirror
1143 // and java_mirror in this klass.
1144 } else {
1145 assert(k->is_instance_klass(), "Must be");
1146 initialize_mirror_fields(InstanceKlass::cast(k), mirror, protection_domain, classData, THREAD);
1147 if (HAS_PENDING_EXCEPTION) {
1148 // If any of the fields throws an exception like OOM remove the klass field
1149 // from the mirror so GC doesn't follow it after the klass has been deallocated.
1150 // This mirror looks like a primitive type, which logically it is because it
1151 // it represents no class.
1152 set_klass(mirror(), nullptr);
1153 return;
1154 }
1155 }
1156 }
1157
1158 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1159 Handle module, Handle protection_domain,
1160 Handle classData, TRAPS) {
1161 assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1162 assert(k->java_mirror() == nullptr, "should only assign mirror once");
1163 // Class_klass has to be loaded because it is used to allocate
1164 // the mirror.
1165 if (vmClasses::Class_klass_is_loaded()) {
1166
1167 if (k->is_refined_objArray_klass()) {
1168 Klass* super_klass = k->super();
1169 assert(super_klass != nullptr, "Must be");
1170 Handle mirror(THREAD, super_klass->java_mirror());
1171 k->set_java_mirror(mirror);
1172 return;
1173 }
1174
1175 Handle mirror;
1176 Handle comp_mirror;
1177
1178 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1179
1180 // set the classLoader field in the java_lang_Class instance
1181 assert(class_loader() == k->class_loader(), "should be same");
1182 set_class_loader(mirror(), class_loader());
1183
1184 // Setup indirection from klass->mirror
1185 // after any exceptions can happen during allocations.
1186 k->set_java_mirror(mirror);
1187
1188 // Set the module field in the java_lang_Class instance. This must be done
1189 // after the mirror is set.
1190 set_mirror_module_field(THREAD, k, mirror, module);
1191
1192 if (comp_mirror() != nullptr) {
1193 // Set after k->java_mirror() is published, because compiled code running
1194 // concurrently doesn't expect a k to have a null java_mirror.
1195 release_set_array_klass(comp_mirror(), k);
1196 }
1197
1198 if (CDSConfig::is_dumping_heap()) {
1199 create_scratch_mirror(k, CHECK);
1200 }
1201 } else {
1202 assert(!CDSConfig::is_using_aot_linked_classes(), "should not come here");
1203 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1204 fixup_mirror_list()->push(k);
1205 }
1206 }
1207
1208 #if INCLUDE_CDS_JAVA_HEAP
1209 // The "scratch mirror" stores the states of the mirror object that can be
1210 // decided at dump time (such as the initial values of the static fields, the
1211 // component mirror, etc). At runtime, more information is added to it by
1212 // java_lang_Class::restore_archived_mirror().
1213 //
1214 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1215 // produces the same result as /*runtime*/create_mirror().
1216 //
1217 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1218 // latter may contain dumptime-specific information that cannot be archived
1219 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1220 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1221 if ((k->class_loader() != nullptr &&
1222 k->class_loader() != SystemDictionary::java_platform_loader() &&
1223 k->class_loader() != SystemDictionary::java_system_loader())) {
1224 // We only archive the mirrors of classes loaded by the built-in loaders
1225 return;
1226 }
1227
1228 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1229 Handle mirror;
1230 Handle comp_mirror;
1231 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1232
1233 if (comp_mirror() != nullptr) {
1234 release_set_array_klass(comp_mirror(), k);
1235 }
1236
1237 HeapShared::set_scratch_java_mirror(k, mirror());
1238 }
1239
1240 // Returns true if the mirror is updated, false if no archived mirror
1241 // data is present. After the archived mirror object is restored, the
1242 // shared klass' _has_raw_archived_mirror flag is cleared.
1243 bool java_lang_Class::restore_archived_mirror(Klass *k,
1244 Handle class_loader, Handle module,
1245 Handle protection_domain, TRAPS) {
1246 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1247 // see more details in vmClasses::resolve_all().
1248 if (!vmClasses::Class_klass_is_loaded() && !CDSConfig::is_using_aot_linked_classes()) {
1249 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1250 fixup_mirror_list()->push(k);
1251 return true;
1252 }
1253
1254 oop m = k->archived_java_mirror();
1255 assert(m != nullptr, "must have stored non-null archived mirror");
1256
1257 // Sanity: clear it now to prevent re-initialization if any of the following fails
1258 k->clear_archived_mirror_index();
1259
1260 // mirror is archived, restore
1261 log_debug(aot, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1262 Handle mirror(THREAD, m);
1263
1264 if (!k->is_array_klass()) {
1265 assert(as_Klass(m) == k, "must be");
1266 // - local static final fields with initial values were initialized at dump time
1267 assert(init_lock(mirror()) != nullptr, "allocated during AOT assembly");
1268
1269 if (protection_domain.not_null()) {
1270 set_protection_domain(mirror(), protection_domain());
1271 }
1272 } else {
1273 ObjArrayKlass* objarray_k = (ObjArrayKlass*)as_Klass(m);
1274 // Mirror should be restored for an ObjArrayKlass or one of its refined array klasses
1275 assert(objarray_k == k || objarray_k->next_refined_array_klass() == k, "must be");
1276 }
1277
1278 assert(class_loader() == k->class_loader(), "should be same");
1279 if (class_loader.not_null()) {
1280 set_class_loader(mirror(), class_loader());
1281 }
1282
1283 k->set_java_mirror(mirror);
1284
1285 set_mirror_module_field(THREAD, k, mirror, module);
1286
1287 if (log_is_enabled(Trace, aot, heap, mirror)) {
1288 ResourceMark rm(THREAD);
1289 log_trace(aot, heap, mirror)(
1290 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1291 }
1292
1293 return true;
1294 }
1295 #endif // INCLUDE_CDS_JAVA_HEAP
1296
1297 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1298 assert(_module_offset != 0, "must have been computed already");
1299 set_module(k->java_mirror(), module());
1300 }
1301
1302 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1303 assert(_oop_size_offset != 0, "must be set");
1304 assert(size > 0, "Oop size must be greater than zero, not %zu", size);
1305 assert(size <= INT_MAX, "Lossy conversion: %zu", size);
1306 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1307 }
1308
1309 int java_lang_Class::static_oop_field_count(oop java_class) {
1310 assert(_static_oop_field_count_offset != 0, "must be set");
1311 return java_class->int_field(_static_oop_field_count_offset);
1312 }
1313
1314 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1315 assert(_static_oop_field_count_offset != 0, "must be set");
1316 java_class->int_field_put(_static_oop_field_count_offset, size);
1317 }
1318
1319 oop java_lang_Class::protection_domain(oop java_class) {
1320 assert(_protection_domain_offset != 0, "must be set");
1321 return java_class->obj_field(_protection_domain_offset);
1322 }
1323 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1324 assert(_protection_domain_offset != 0, "must be set");
1325 java_class->obj_field_put(_protection_domain_offset, pd);
1326 }
1327
1328 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1329 assert(_component_mirror_offset != 0, "must be set");
1330 assert(java_lang_Class::as_Klass(java_class) != nullptr &&
1331 java_lang_Class::as_Klass(java_class)->is_array_klass(), "must be");
1332 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1333 }
1334
1335 oop java_lang_Class::component_mirror(oop java_class) {
1336 assert(_component_mirror_offset != 0, "must be set");
1337 return java_class->obj_field(_component_mirror_offset);
1338 }
1339
1340 oop java_lang_Class::init_lock(oop java_class) {
1341 assert(_init_lock_offset != 0, "must be set");
1342 return java_class->obj_field(_init_lock_offset);
1343 }
1344 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1345 assert(_init_lock_offset != 0, "must be set");
1346 java_class->obj_field_put(_init_lock_offset, init_lock);
1347 }
1348
1349 objArrayOop java_lang_Class::signers(oop java_class) {
1350 assert(_signers_offset != 0, "must be set");
1351 return (objArrayOop)java_class->obj_field(_signers_offset);
1352 }
1353
1354 oop java_lang_Class::class_data(oop java_class) {
1355 assert(_classData_offset != 0, "must be set");
1356 return java_class->obj_field(_classData_offset);
1357 }
1358 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1359 assert(_classData_offset != 0, "must be set");
1360 java_class->obj_field_put(_classData_offset, class_data);
1361 }
1362
1363 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1364 assert(_class_loader_offset != 0, "offsets should have been initialized");
1365 java_class->obj_field_put(_class_loader_offset, loader);
1366 }
1367
1368 oop java_lang_Class::class_loader(oop java_class) {
1369 assert(_class_loader_offset != 0, "must be set");
1370 return java_class->obj_field(_class_loader_offset);
1371 }
1372
1373 oop java_lang_Class::module(oop java_class) {
1374 assert(_module_offset != 0, "must be set");
1375 return java_class->obj_field(_module_offset);
1376 }
1377
1378 void java_lang_Class::set_module(oop java_class, oop module) {
1379 assert(_module_offset != 0, "must be set");
1380 java_class->obj_field_put(_module_offset, module);
1381 }
1382
1383 oop java_lang_Class::name(Handle java_class, TRAPS) {
1384 assert(_name_offset != 0, "must be set");
1385 oop o = java_class->obj_field(_name_offset);
1386 if (o == nullptr) {
1387 o = StringTable::intern(as_external_name(java_class()), THREAD);
1388 java_class->obj_field_put(_name_offset, o);
1389 }
1390 return o;
1391 }
1392
1393 oop java_lang_Class::source_file(oop java_class) {
1394 assert(_source_file_offset != 0, "must be set");
1395 return java_class->obj_field(_source_file_offset);
1396 }
1397
1398 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1399 assert(_source_file_offset != 0, "must be set");
1400 java_class->obj_field_put(_source_file_offset, source_file);
1401 }
1402
1403 void java_lang_Class::set_is_primitive(oop java_class) {
1404 assert(_is_primitive_offset != 0, "must be set");
1405 java_class->bool_field_put(_is_primitive_offset, true);
1406 }
1407
1408 void java_lang_Class::set_is_identity(oop java_class, bool value) {
1409 assert(_is_identity_offset != 0, "must be set");
1410 java_class->bool_field_put(_is_identity_offset, value);
1411 }
1412
1413 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1414 // Mirrors for basic types have a null klass field, which makes them special.
1415 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1416 if (type != T_VOID) {
1417 Klass* aklass = Universe::typeArrayKlass(type);
1418 assert(aklass != nullptr, "correct bootstrap");
1419 release_set_array_klass(java_class, aklass);
1420 }
1421 #ifdef ASSERT
1422 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1423 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1424 #endif
1425 set_modifiers(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
1426 set_raw_access_flags(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
1427
1428 set_is_primitive(java_class);
1429 return java_class;
1430 }
1431
1432 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1433 assert(is_instance(java_class), "must be a Class object");
1434 java_class->metadata_field_put(_klass_offset, klass);
1435 }
1436
1437
1438 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1439 assert(is_instance(java_class), "must be a Class object");
1440 Symbol* name = nullptr;
1441 bool is_instance = false;
1442 if (is_primitive(java_class)) {
1443 name = vmSymbols::type_signature(primitive_type(java_class));
1444 } else {
1445 Klass* k = as_Klass(java_class);
1446 is_instance = k->is_instance_klass();
1447 name = k->name();
1448 }
1449 if (name == nullptr) {
1450 st->print("<null>");
1451 return;
1452 }
1453 if (is_instance) {
1454 st->print("L");
1455 }
1456 st->write((char*) name->base(), (int) name->utf8_length());
1457 if (is_instance) st->print(";");
1458 }
1459
1460 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1461 assert(is_instance(java_class), "must be a Class object");
1462 Symbol* name;
1463 if (is_primitive(java_class)) {
1464 name = vmSymbols::type_signature(primitive_type(java_class));
1465 // Because this can create a new symbol, the caller has to decrement
1466 // the refcount, so make adjustment here and below for symbols returned
1467 // that are not created or incremented due to a successful lookup.
1468 name->increment_refcount();
1469 } else {
1470 Klass* k = as_Klass(java_class);
1471 if (!k->is_instance_klass()) {
1472 name = k->name();
1473 name->increment_refcount();
1474 } else {
1475 ResourceMark rm;
1476 const char* sigstr = k->signature_name();
1477 int siglen = (int) strlen(sigstr);
1478 if (!intern_if_not_found) {
1479 name = SymbolTable::probe(sigstr, siglen);
1480 } else {
1481 name = SymbolTable::new_symbol(sigstr, siglen);
1482 }
1483 }
1484 }
1485 return name;
1486 }
1487
1488 // Returns the Java name for this Java mirror (Resource allocated)
1489 // See Klass::external_name().
1490 // For primitive type Java mirrors, its type name is returned.
1491 const char* java_lang_Class::as_external_name(oop java_class) {
1492 assert(is_instance(java_class), "must be a Class object");
1493 const char* name = nullptr;
1494 if (is_primitive(java_class)) {
1495 name = type2name(primitive_type(java_class));
1496 } else {
1497 name = as_Klass(java_class)->external_name();
1498 }
1499 if (name == nullptr) {
1500 name = "<null>";
1501 }
1502 return name;
1503 }
1504
1505 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1506 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1507 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass");
1508 return k;
1509 }
1510
1511 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1512 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1513 assert(!klass->is_refined_objArray_klass(), "should not be ref or flat array klass");
1514 java_class->release_metadata_field_put(_array_klass_offset, klass);
1515 }
1516
1517
1518 BasicType java_lang_Class::primitive_type(oop java_class) {
1519 assert(is_primitive(java_class), "just checking");
1520 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1521 BasicType type = T_VOID;
1522 if (ak != nullptr) {
1523 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1524 type = ArrayKlass::cast(ak)->element_type();
1525 } else {
1526 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1527 }
1528 #ifdef ASSERT
1529 if (CDSConfig::is_dumping_heap()) {
1530 oop mirror = Universe::java_mirror(type);
1531 oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1532 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1533 } else {
1534 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1535 }
1536 #endif
1537 return type;
1538 }
1539
1540 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1541 assert(is_instance(java_class), "must be a Class object");
1542 if (is_primitive(java_class)) {
1543 if (reference_klass != nullptr)
1544 (*reference_klass) = nullptr;
1545 return primitive_type(java_class);
1546 } else {
1547 if (reference_klass != nullptr)
1548 (*reference_klass) = as_Klass(java_class);
1549 return T_OBJECT;
1550 }
1551 }
1552
1553
1554 oop java_lang_Class::primitive_mirror(BasicType t) {
1555 oop mirror = Universe::java_mirror(t);
1556 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1557 assert(is_primitive(mirror), "must be primitive");
1558 return mirror;
1559 }
1560
1561 #define CLASS_FIELDS_DO(macro) \
1562 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1563 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1564 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1565 macro(_module_offset, k, "module", module_signature, false); \
1566 macro(_name_offset, k, "name", string_signature, false); \
1567 macro(_classData_offset, k, "classData", object_signature, false); \
1568 macro(_reflectionData_offset, k, "reflectionData", java_lang_ref_SoftReference_signature, false); \
1569 macro(_signers_offset, k, "signers", object_array_signature, false); \
1570 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), char_signature, false); \
1571 macro(_raw_access_flags_offset, k, "classFileAccessFlags", char_signature, false); \
1572 macro(_protection_domain_offset, k, "protectionDomain", java_security_ProtectionDomain_signature, false); \
1573 macro(_is_primitive_offset, k, "primitive", bool_signature, false); \
1574 macro(_is_identity_offset, k, "identity", bool_signature, false);
1575
1576 void java_lang_Class::compute_offsets() {
1577 if (_offsets_computed) {
1578 return;
1579 }
1580
1581 _offsets_computed = true;
1582
1583 InstanceKlass* k = vmClasses::Class_klass();
1584 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1585 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1586 }
1587
1588 #if INCLUDE_CDS
1589 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1590 f->do_bool(&_offsets_computed);
1591
1592 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1593
1594 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1595 }
1596 #endif
1597
1598 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1599 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1600 return the_class_mirror->int_field(_classRedefinedCount_offset);
1601 }
1602
1603 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1604 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1605 the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1606 }
1607
1608 int java_lang_Class::modifiers(oop the_class_mirror) {
1609 assert(_modifiers_offset != 0, "offsets should have been initialized");
1610 return the_class_mirror->char_field(_modifiers_offset);
1611 }
1612
1613 void java_lang_Class::set_modifiers(oop the_class_mirror, u2 value) {
1614 assert(_modifiers_offset != 0, "offsets should have been initialized");
1615 the_class_mirror->char_field_put(_modifiers_offset, value);
1616 }
1617
1618 void java_lang_Class::set_raw_access_flags(oop the_class_mirror, u2 value) {
1619 assert(_raw_access_flags_offset != 0, "offsets should have been initialized");
1620 the_class_mirror->char_field_put(_raw_access_flags_offset, value);
1621 }
1622
1623
1624 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1625 // platform thread structure, and a eetop offset which was used for thread
1626 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1627 // merged, so in the HotSpot VM we just use the eetop field for the thread
1628 // instead of the privateInfo_offset.
1629 //
1630 // Note: The stackSize field is only present starting in 1.4.
1631
1632 int java_lang_Thread_FieldHolder::_group_offset;
1633 int java_lang_Thread_FieldHolder::_priority_offset;
1634 int java_lang_Thread_FieldHolder::_stackSize_offset;
1635 int java_lang_Thread_FieldHolder::_daemon_offset;
1636 int java_lang_Thread_FieldHolder::_thread_status_offset;
1637
1638 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1639 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1640 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1641 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1642 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1643 macro(_thread_status_offset, k, "threadStatus", int_signature, false)
1644
1645 void java_lang_Thread_FieldHolder::compute_offsets() {
1646 assert(_group_offset == 0, "offsets should be initialized only once");
1647
1648 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1649 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1650 }
1651
1652 #if INCLUDE_CDS
1653 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1654 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1655 }
1656 #endif
1657
1658 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1659 return holder->obj_field(_group_offset);
1660 }
1661
1662 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1663 return (ThreadPriority)holder->int_field(_priority_offset);
1664 }
1665
1666 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1667 holder->int_field_put(_priority_offset, priority);
1668 }
1669
1670 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1671 return holder->long_field(_stackSize_offset);
1672 }
1673
1674 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1675 return holder->bool_field(_daemon_offset) != 0;
1676 }
1677
1678 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1679 assert(val, "daemon status is never turned off");
1680 holder->bool_field_put(_daemon_offset, val);
1681 }
1682
1683 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1684 holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1685 }
1686
1687 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1688 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1689 }
1690
1691
1692 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1693
1694 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1695 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true);
1696
1697 void java_lang_Thread_Constants::compute_offsets() {
1698 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1699
1700 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1701 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1702 }
1703
1704 #if INCLUDE_CDS
1705 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1706 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1707 }
1708 #endif
1709
1710 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1711 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1712 oop base = k->static_field_base_raw();
1713 return base->obj_field(_static_VTHREAD_GROUP_offset);
1714 }
1715
1716
1717 int java_lang_Thread::_holder_offset;
1718 int java_lang_Thread::_name_offset;
1719 int java_lang_Thread::_contextClassLoader_offset;
1720 int java_lang_Thread::_eetop_offset;
1721 int java_lang_Thread::_jvmti_thread_state_offset;
1722 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1723 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1724 int java_lang_Thread::_interrupted_offset;
1725 int java_lang_Thread::_interruptLock_offset;
1726 int java_lang_Thread::_tid_offset;
1727 int java_lang_Thread::_continuation_offset;
1728 int java_lang_Thread::_park_blocker_offset;
1729 int java_lang_Thread::_scopedValueBindings_offset;
1730 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1731
1732 #define THREAD_FIELDS_DO(macro) \
1733 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \
1734 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1735 macro(_contextClassLoader_offset, k, "contextClassLoader", classloader_signature, false); \
1736 macro(_eetop_offset, k, "eetop", long_signature, false); \
1737 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1738 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \
1739 macro(_tid_offset, k, "tid", long_signature, false); \
1740 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1741 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1742 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1743
1744 void java_lang_Thread::compute_offsets() {
1745 assert(_holder_offset == 0, "offsets should be initialized only once");
1746
1747 InstanceKlass* k = vmClasses::Thread_klass();
1748 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1749 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1750 }
1751
1752 #if INCLUDE_CDS
1753 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1754 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1755 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1756 }
1757 #endif
1758
1759 JavaThread* java_lang_Thread::thread(oop java_thread) {
1760 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1761 }
1762
1763 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1764 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1765 }
1766
1767 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1768 java_thread->address_field_put(_eetop_offset, (address)thread);
1769 }
1770
1771 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1772 java_thread->release_address_field_put(_eetop_offset, (address)thread);
1773 }
1774
1775 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1776 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1777 }
1778
1779 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1780 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1781 }
1782
1783 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1784 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1785 }
1786
1787 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1788 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1789 int val = VTMS_transition_disable_count(java_thread);
1790 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1791 }
1792
1793 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1794 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1795 int val = VTMS_transition_disable_count(java_thread);
1796 assert(val > 0, "VTMS_transition_disable_count should never be negative");
1797 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1798 }
1799
1800 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1801 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1802 }
1803
1804 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1805 assert(is_in_VTMS_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside");
1806 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1807 }
1808
1809 int java_lang_Thread::is_in_VTMS_transition_offset() {
1810 return _jvmti_is_in_VTMS_transition_offset;
1811 }
1812
1813 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1814 assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1815 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1816 }
1817
1818 oop java_lang_Thread::holder(oop java_thread) {
1819 // Note: may return null if the thread is still attaching
1820 return java_thread->obj_field(_holder_offset);
1821 }
1822 oop java_lang_Thread::interrupt_lock(oop java_thread) {
1823 return java_thread->obj_field(_interruptLock_offset);
1824 }
1825
1826 bool java_lang_Thread::interrupted(oop java_thread) {
1827 // Make sure the caller can safely access oops.
1828 assert(Thread::current()->is_VM_thread() ||
1829 (JavaThread::current()->thread_state() != _thread_blocked &&
1830 JavaThread::current()->thread_state() != _thread_in_native),
1831 "Unsafe access to oop");
1832 return java_thread->bool_field_volatile(_interrupted_offset);
1833 }
1834
1835 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1836 // Make sure the caller can safely access oops.
1837 assert(Thread::current()->is_VM_thread() ||
1838 (JavaThread::current()->thread_state() != _thread_blocked &&
1839 JavaThread::current()->thread_state() != _thread_in_native),
1840 "Unsafe access to oop");
1841 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1842 }
1843
1844
1845 oop java_lang_Thread::name(oop java_thread) {
1846 return java_thread->obj_field(_name_offset);
1847 }
1848
1849
1850 void java_lang_Thread::set_name(oop java_thread, oop name) {
1851 java_thread->obj_field_put(_name_offset, name);
1852 }
1853
1854 // Convenience macros for setting and getting Thread fields that
1855 // are actually stored in the FieldHolder object of the thread.
1856 // The FieldHolder can be null whilst a thread is attaching via
1857 // JNI, and when the main thread is attaching.
1858
1859 // The default value should be the default/zero initialized value
1860 // of the field as it would be in java.lang.Thread.FieldHolder.
1861 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \
1862 { \
1863 oop holder = java_lang_Thread::holder(java_thread); \
1864 if (holder != nullptr) \
1865 return java_lang_Thread_FieldHolder::field(holder); \
1866 else \
1867 return default_val; \
1868 }
1869
1870 // We should never be trying to set a field of an attaching thread.
1871 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \
1872 { \
1873 oop holder = java_lang_Thread::holder(java_thread); \
1874 assert(holder != nullptr, "Thread not fully initialized"); \
1875 java_lang_Thread_FieldHolder::set_##field(holder, value); \
1876 }
1877
1878
1879 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1880 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1881 }
1882
1883
1884 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1885 SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1886 }
1887
1888
1889 oop java_lang_Thread::threadGroup(oop java_thread) {
1890 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1891 }
1892
1893
1894 bool java_lang_Thread::is_alive(oop java_thread) {
1895 JavaThread* thr = java_lang_Thread::thread(java_thread);
1896 return (thr != nullptr);
1897 }
1898
1899
1900 bool java_lang_Thread::is_daemon(oop java_thread) {
1901 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1902 }
1903
1904
1905 void java_lang_Thread::set_daemon(oop java_thread) {
1906 SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1907 }
1908
1909 oop java_lang_Thread::context_class_loader(oop java_thread) {
1910 return java_thread->obj_field(_contextClassLoader_offset);
1911 }
1912
1913
1914 jlong java_lang_Thread::stackSize(oop java_thread) {
1915 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1916 }
1917
1918 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1919 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1920 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1921 }
1922
1923 // Read thread status value from threadStatus field in java.lang.Thread java class.
1924 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1925 // Make sure the caller is operating on behalf of the VM or is
1926 // running VM code (state == _thread_in_vm).
1927 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1928 JavaThread::current()->thread_state() == _thread_in_vm ||
1929 JavaThread::current() == java_lang_Thread::thread(java_thread),
1930 "unsafe call to java_lang_Thread::get_thread_status()?");
1931 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1932 }
1933
1934 ByteSize java_lang_Thread::thread_id_offset() {
1935 return in_ByteSize(_tid_offset);
1936 }
1937
1938 oop java_lang_Thread::park_blocker(oop java_thread) {
1939 return java_thread->obj_field_access<MO_RELAXED>(_park_blocker_offset);
1940 }
1941
1942 // Obtain stack trace for platform or mounted virtual thread.
1943 // If jthread is a virtual thread and it has been unmounted (or remounted to different carrier) the method returns null.
1944 // The caller (java.lang.VirtualThread) handles returned nulls via retry.
1945 oop java_lang_Thread::async_get_stack_trace(jobject jthread, TRAPS) {
1946 ThreadsListHandle tlh(THREAD);
1947 JavaThread* java_thread = nullptr;
1948 oop thread_oop;
1949
1950 bool has_java_thread = tlh.cv_internal_thread_to_JavaThread(jthread, &java_thread, &thread_oop);
1951 if (!has_java_thread) {
1952 return nullptr;
1953 }
1954
1955 class GetStackTraceHandshakeClosure : public HandshakeClosure {
1956 public:
1957 const Handle _thread_h;
1958 int _depth;
1959 bool _retry_handshake;
1960 GrowableArray<Method*>* _methods;
1961 GrowableArray<int>* _bcis;
1962
1963 GetStackTraceHandshakeClosure(Handle thread_h) :
1964 HandshakeClosure("GetStackTraceHandshakeClosure"), _thread_h(thread_h), _depth(0), _retry_handshake(false),
1965 _methods(nullptr), _bcis(nullptr) {
1966 }
1967 ~GetStackTraceHandshakeClosure() {
1968 delete _methods;
1969 delete _bcis;
1970 }
1971
1972 bool read_reset_retry() {
1973 bool ret = _retry_handshake;
1974 // If we re-execute the handshake this method need to return false
1975 // when the handshake cannot be performed. (E.g. thread terminating)
1976 _retry_handshake = false;
1977 return ret;
1978 }
1979
1980 void do_thread(Thread* th) {
1981 if (!Thread::current()->is_Java_thread()) {
1982 _retry_handshake = true;
1983 return;
1984 }
1985
1986 JavaThread* java_thread = JavaThread::cast(th);
1987
1988 if (!java_thread->has_last_Java_frame()) {
1989 return;
1990 }
1991
1992 bool carrier = false;
1993 if (java_lang_VirtualThread::is_instance(_thread_h())) {
1994 // Ensure _thread_h is still mounted to java_thread.
1995 const ContinuationEntry* ce = java_thread->vthread_continuation();
1996 if (ce == nullptr || ce->cont_oop(java_thread) != java_lang_VirtualThread::continuation(_thread_h())) {
1997 // Target thread has been unmounted.
1998 return;
1999 }
2000 } else {
2001 carrier = (java_thread->vthread_continuation() != nullptr);
2002 }
2003
2004 const int max_depth = MaxJavaStackTraceDepth;
2005 const bool skip_hidden = !ShowHiddenFrames;
2006
2007 // Pick minimum length that will cover most cases
2008 int init_length = 64;
2009 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
2010 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
2011
2012 int total_count = 0;
2013 for (vframeStream vfst(java_thread, false, false, carrier); // we don't process frames as we don't care about oops
2014 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
2015 vfst.next()) {
2016
2017 if (skip_hidden && (vfst.method()->is_hidden() ||
2018 vfst.method()->is_continuation_enter_intrinsic())) {
2019 continue;
2020 }
2021
2022 _methods->push(vfst.method());
2023 _bcis->push(vfst.bci());
2024 total_count++;
2025 }
2026
2027 _depth = total_count;
2028 }
2029 };
2030
2031 // Handshake with target
2032 ResourceMark rm(THREAD);
2033 HandleMark hm(THREAD);
2034 GetStackTraceHandshakeClosure gsthc(Handle(THREAD, thread_oop));
2035 do {
2036 Handshake::execute(&gsthc, &tlh, java_thread);
2037 } while (gsthc.read_reset_retry());
2038
2039 // Stop if no stack trace is found.
2040 if (gsthc._depth == 0) {
2041 return nullptr;
2042 }
2043
2044 // Convert to StackTraceElement array
2045 InstanceKlass* k = vmClasses::StackTraceElement_klass();
2046 assert(k != nullptr, "must be loaded in 1.4+");
2047 if (k->should_be_initialized()) {
2048 k->initialize(CHECK_NULL);
2049 }
2050 objArrayHandle trace = oopFactory::new_objArray_handle(k, gsthc._depth, CHECK_NULL);
2051
2052 for (int i = 0; i < gsthc._depth; i++) {
2053 methodHandle method(THREAD, gsthc._methods->at(i));
2054 oop element = java_lang_StackTraceElement::create(method,
2055 gsthc._bcis->at(i),
2056 CHECK_NULL);
2057 trace->obj_at_put(i, element);
2058 }
2059
2060 return trace();
2061 }
2062
2063 const char* java_lang_Thread::thread_status_name(oop java_thread) {
2064 JavaThreadStatus status = get_thread_status(java_thread);
2065 switch (status) {
2066 case JavaThreadStatus::NEW : return "NEW";
2067 case JavaThreadStatus::RUNNABLE : return "RUNNABLE";
2068 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)";
2069 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)";
2070 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
2071 case JavaThreadStatus::PARKED : return "WAITING (parking)";
2072 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)";
2073 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
2074 case JavaThreadStatus::TERMINATED : return "TERMINATED";
2075 default : return "UNKNOWN";
2076 };
2077 }
2078 int java_lang_ThreadGroup::_parent_offset;
2079 int java_lang_ThreadGroup::_name_offset;
2080 int java_lang_ThreadGroup::_maxPriority_offset;
2081 int java_lang_ThreadGroup::_daemon_offset;
2082
2083 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
2084 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2085 return java_thread_group->obj_field(_parent_offset);
2086 }
2087
2088 // ("name as oop" accessor is not necessary)
2089
2090 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
2091 oop name = java_thread_group->obj_field(_name_offset);
2092 // ThreadGroup.name can be null
2093 if (name != nullptr) {
2094 return java_lang_String::as_utf8_string(name);
2095 }
2096 return nullptr;
2097 }
2098
2099 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
2100 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2101 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
2102 }
2103
2104 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
2105 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2106 return java_thread_group->bool_field(_daemon_offset) != 0;
2107 }
2108
2109 #define THREADGROUP_FIELDS_DO(macro) \
2110 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
2111 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
2112 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
2113 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false);
2114
2115 void java_lang_ThreadGroup::compute_offsets() {
2116 assert(_parent_offset == 0, "offsets should be initialized only once");
2117
2118 InstanceKlass* k = vmClasses::ThreadGroup_klass();
2119 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2120 }
2121
2122 #if INCLUDE_CDS
2123 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
2124 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2125 }
2126 #endif
2127
2128
2129 // java_lang_VirtualThread
2130
2131 int java_lang_VirtualThread::static_vthread_scope_offset;
2132 int java_lang_VirtualThread::_carrierThread_offset;
2133 int java_lang_VirtualThread::_continuation_offset;
2134 int java_lang_VirtualThread::_state_offset;
2135 int java_lang_VirtualThread::_next_offset;
2136 int java_lang_VirtualThread::_onWaitingList_offset;
2137 int java_lang_VirtualThread::_notified_offset;
2138 int java_lang_VirtualThread::_interruptible_wait_offset;
2139 int java_lang_VirtualThread::_timeout_offset;
2140 int java_lang_VirtualThread::_objectWaiter_offset;
2141
2142 #define VTHREAD_FIELDS_DO(macro) \
2143 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \
2144 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \
2145 macro(_continuation_offset, k, "cont", continuation_signature, false); \
2146 macro(_state_offset, k, "state", int_signature, false); \
2147 macro(_next_offset, k, "next", vthread_signature, false); \
2148 macro(_onWaitingList_offset, k, "onWaitingList", bool_signature, false); \
2149 macro(_notified_offset, k, "notified", bool_signature, false); \
2150 macro(_interruptible_wait_offset, k, "interruptibleWait", bool_signature, false); \
2151 macro(_timeout_offset, k, "timeout", long_signature, false);
2152
2153
2154 void java_lang_VirtualThread::compute_offsets() {
2155 InstanceKlass* k = vmClasses::VirtualThread_klass();
2156 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2157 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2158 }
2159
2160 bool java_lang_VirtualThread::is_instance(oop obj) {
2161 return obj != nullptr && is_subclass(obj->klass());
2162 }
2163
2164 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
2165 oop thread = vthread->obj_field(_carrierThread_offset);
2166 return thread;
2167 }
2168
2169 oop java_lang_VirtualThread::continuation(oop vthread) {
2170 oop cont = vthread->obj_field(_continuation_offset);
2171 return cont;
2172 }
2173
2174 int java_lang_VirtualThread::state(oop vthread) {
2175 return vthread->int_field_acquire(_state_offset);
2176 }
2177
2178 void java_lang_VirtualThread::set_state(oop vthread, int state) {
2179 vthread->release_int_field_put(_state_offset, state);
2180 }
2181
2182 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) {
2183 jint* addr = vthread->field_addr<jint>(_state_offset);
2184 int res = AtomicAccess::cmpxchg(addr, old_state, new_state);
2185 return res;
2186 }
2187
2188 oop java_lang_VirtualThread::next(oop vthread) {
2189 return vthread->obj_field(_next_offset);
2190 }
2191
2192 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) {
2193 vthread->obj_field_put(_next_offset, next_vthread);
2194 }
2195
2196 // Add vthread to the waiting list if it's not already in it. Multiple threads
2197 // could be trying to add vthread to the list at the same time, so we control
2198 // access with a cmpxchg on onWaitingList. The winner adds vthread to the list.
2199 // Method returns true if we added vthread to the list, false otherwise.
2200 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) {
2201 jboolean* addr = vthread->field_addr<jboolean>(_onWaitingList_offset);
2202 jboolean vthread_on_list = AtomicAccess::load(addr);
2203 if (!vthread_on_list) {
2204 vthread_on_list = AtomicAccess::cmpxchg(addr, (jboolean)JNI_FALSE, (jboolean)JNI_TRUE);
2205 if (!vthread_on_list) {
2206 for (;;) {
2207 oop head = list_head.resolve();
2208 java_lang_VirtualThread::set_next(vthread, head);
2209 if (list_head.cmpxchg(head, vthread) == head) return true;
2210 }
2211 }
2212 }
2213 return false; // already on waiting list
2214 }
2215
2216 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) {
2217 vthread->bool_field_put_volatile(_notified_offset, value);
2218 }
2219
2220 void java_lang_VirtualThread::set_interruptible_wait(oop vthread, jboolean value) {
2221 vthread->bool_field_put_volatile(_interruptible_wait_offset, value);
2222 }
2223
2224 jlong java_lang_VirtualThread::timeout(oop vthread) {
2225 return vthread->long_field(_timeout_offset);
2226 }
2227
2228 void java_lang_VirtualThread::set_timeout(oop vthread, jlong value) {
2229 vthread->long_field_put(_timeout_offset, value);
2230 }
2231
2232 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2233 JavaThreadStatus status = JavaThreadStatus::NEW;
2234 switch (state & ~SUSPENDED) {
2235 case NEW:
2236 status = JavaThreadStatus::NEW;
2237 break;
2238 case STARTED:
2239 case RUNNING:
2240 case PARKING:
2241 case TIMED_PARKING:
2242 case UNPARKED:
2243 case YIELDING:
2244 case YIELDED:
2245 case UNBLOCKED:
2246 case WAITING:
2247 case TIMED_WAITING:
2248 status = JavaThreadStatus::RUNNABLE;
2249 break;
2250 case PARKED:
2251 case PINNED:
2252 status = JavaThreadStatus::PARKED;
2253 break;
2254 case TIMED_PARKED:
2255 case TIMED_PINNED:
2256 status = JavaThreadStatus::PARKED_TIMED;
2257 break;
2258 case BLOCKING:
2259 case BLOCKED:
2260 status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER;
2261 break;
2262 case WAIT:
2263 status = JavaThreadStatus::IN_OBJECT_WAIT;
2264 break;
2265 case TIMED_WAIT:
2266 status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED;
2267 break;
2268 case TERMINATED:
2269 status = JavaThreadStatus::TERMINATED;
2270 break;
2271 default:
2272 ShouldNotReachHere();
2273 }
2274 return status;
2275 }
2276
2277 ObjectMonitor* java_lang_VirtualThread::current_pending_monitor(oop vthread) {
2278 ObjectWaiter* waiter = objectWaiter(vthread);
2279 if (waiter != nullptr && waiter->at_monitorenter()) {
2280 return waiter->monitor();
2281 }
2282 return nullptr;
2283 }
2284
2285 ObjectMonitor* java_lang_VirtualThread::current_waiting_monitor(oop vthread) {
2286 ObjectWaiter* waiter = objectWaiter(vthread);
2287 if (waiter != nullptr && waiter->is_wait()) {
2288 return waiter->monitor();
2289 }
2290 return nullptr;
2291 }
2292
2293 bool java_lang_VirtualThread::is_preempted(oop vthread) {
2294 oop continuation = java_lang_VirtualThread::continuation(vthread);
2295 assert(continuation != nullptr, "vthread with no continuation");
2296 stackChunkOop chunk = jdk_internal_vm_Continuation::tail(continuation);
2297 return chunk != nullptr && chunk->preempted();
2298 }
2299
2300 #if INCLUDE_CDS
2301 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2302 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2303 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2304 }
2305 #endif
2306
2307 // java_lang_Throwable
2308
2309 int java_lang_Throwable::_backtrace_offset;
2310 int java_lang_Throwable::_detailMessage_offset;
2311 int java_lang_Throwable::_stackTrace_offset;
2312 int java_lang_Throwable::_depth_offset;
2313 int java_lang_Throwable::_cause_offset;
2314 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2315
2316 #define THROWABLE_FIELDS_DO(macro) \
2317 macro(_backtrace_offset, k, "backtrace", object_signature, false); \
2318 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \
2319 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2320 macro(_depth_offset, k, "depth", int_signature, false); \
2321 macro(_cause_offset, k, "cause", throwable_signature, false); \
2322 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2323
2324 void java_lang_Throwable::compute_offsets() {
2325 InstanceKlass* k = vmClasses::Throwable_klass();
2326 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2327 }
2328
2329 #if INCLUDE_CDS
2330 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2331 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2332 }
2333 #endif
2334
2335 oop java_lang_Throwable::unassigned_stacktrace() {
2336 InstanceKlass* ik = vmClasses::Throwable_klass();
2337 oop base = ik->static_field_base_raw();
2338 return base->obj_field(_static_unassigned_stacktrace_offset);
2339 }
2340
2341 oop java_lang_Throwable::backtrace(oop throwable) {
2342 return throwable->obj_field_acquire(_backtrace_offset);
2343 }
2344
2345
2346 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2347 throwable->release_obj_field_put(_backtrace_offset, value);
2348 }
2349
2350 int java_lang_Throwable::depth(oop throwable) {
2351 return throwable->int_field(_depth_offset);
2352 }
2353
2354 void java_lang_Throwable::set_depth(oop throwable, int value) {
2355 throwable->int_field_put(_depth_offset, value);
2356 }
2357
2358 oop java_lang_Throwable::message(oop throwable) {
2359 return throwable->obj_field(_detailMessage_offset);
2360 }
2361
2362 const char* java_lang_Throwable::message_as_utf8(oop throwable) {
2363 oop msg = java_lang_Throwable::message(throwable);
2364 const char* msg_utf8 = nullptr;
2365 if (msg != nullptr) {
2366 msg_utf8 = java_lang_String::as_utf8_string(msg);
2367 }
2368 return msg_utf8;
2369 }
2370
2371 oop java_lang_Throwable::cause(oop throwable) {
2372 return throwable->obj_field(_cause_offset);
2373 }
2374
2375 void java_lang_Throwable::set_message(oop throwable, oop value) {
2376 throwable->obj_field_put(_detailMessage_offset, value);
2377 }
2378
2379
2380 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2381 throwable->obj_field_put(_stackTrace_offset, st_element_array);
2382 }
2383
2384 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2385 set_stacktrace(throwable, nullptr);
2386 }
2387
2388
2389 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2390 ResourceMark rm;
2391 Klass* k = throwable->klass();
2392 assert(k != nullptr, "just checking");
2393 st->print("%s", k->external_name());
2394 oop msg = message(throwable);
2395 if (msg != nullptr) {
2396 st->print(": %s", java_lang_String::as_utf8_string(msg));
2397 }
2398 }
2399
2400 // After this many redefines, the stack trace is unreliable.
2401 const int MAX_VERSION = USHRT_MAX;
2402
2403 static inline bool version_matches(Method* method, int version) {
2404 assert(version < MAX_VERSION, "version is too big");
2405 return method != nullptr && (method->constants()->version() == version);
2406 }
2407
2408 // This class provides a simple wrapper over the internal structure of
2409 // exception backtrace to insulate users of the backtrace from needing
2410 // to know what it looks like.
2411 // The code of this class is not GC safe. Allocations can only happen
2412 // in expand().
2413 class BacktraceBuilder: public StackObj {
2414 friend class BacktraceIterator;
2415 private:
2416 Handle _backtrace;
2417 objArrayOop _head;
2418 typeArrayOop _methods;
2419 typeArrayOop _bcis;
2420 objArrayOop _mirrors;
2421 typeArrayOop _names; // Needed to insulate method name against redefinition.
2422 // True if the top frame of the backtrace is omitted because it shall be hidden.
2423 bool _has_hidden_top_frame;
2424 int _index;
2425 NoSafepointVerifier _nsv;
2426
2427 enum {
2428 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2429 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2430 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2431 trace_names_offset = java_lang_Throwable::trace_names_offset,
2432 trace_conts_offset = java_lang_Throwable::trace_conts_offset,
2433 trace_next_offset = java_lang_Throwable::trace_next_offset,
2434 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2435 trace_size = java_lang_Throwable::trace_size,
2436 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2437 };
2438
2439 // get info out of chunks
2440 static typeArrayOop get_methods(objArrayHandle chunk) {
2441 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2442 assert(methods != nullptr, "method array should be initialized in backtrace");
2443 return methods;
2444 }
2445 static typeArrayOop get_bcis(objArrayHandle chunk) {
2446 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2447 assert(bcis != nullptr, "bci array should be initialized in backtrace");
2448 return bcis;
2449 }
2450 static objArrayOop get_mirrors(objArrayHandle chunk) {
2451 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2452 assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2453 return mirrors;
2454 }
2455 static typeArrayOop get_names(objArrayHandle chunk) {
2456 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2457 assert(names != nullptr, "names array should be initialized in backtrace");
2458 return names;
2459 }
2460 static bool has_hidden_top_frame(objArrayHandle chunk) {
2461 oop hidden = chunk->obj_at(trace_hidden_offset);
2462 return hidden != nullptr;
2463 }
2464
2465 public:
2466
2467 // constructor for new backtrace
2468 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2469 expand(CHECK);
2470 _backtrace = Handle(THREAD, _head);
2471 _index = 0;
2472 }
2473
2474 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2475 _methods = get_methods(backtrace);
2476 _bcis = get_bcis(backtrace);
2477 _mirrors = get_mirrors(backtrace);
2478 _names = get_names(backtrace);
2479 _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2480 assert(_methods->length() == _bcis->length() &&
2481 _methods->length() == _mirrors->length() &&
2482 _mirrors->length() == _names->length(),
2483 "method and source information arrays should match");
2484
2485 // head is the preallocated backtrace
2486 _head = backtrace();
2487 _backtrace = Handle(thread, _head);
2488 _index = 0;
2489 }
2490
2491 void expand(TRAPS) {
2492 objArrayHandle old_head(THREAD, _head);
2493 PauseNoSafepointVerifier pnsv(&_nsv);
2494
2495 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2496 objArrayHandle new_head(THREAD, head);
2497
2498 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2499 typeArrayHandle new_methods(THREAD, methods);
2500
2501 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2502 typeArrayHandle new_bcis(THREAD, bcis);
2503
2504 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2505 objArrayHandle new_mirrors(THREAD, mirrors);
2506
2507 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2508 typeArrayHandle new_names(THREAD, names);
2509
2510 if (!old_head.is_null()) {
2511 old_head->obj_at_put(trace_next_offset, new_head());
2512 }
2513 new_head->obj_at_put(trace_methods_offset, new_methods());
2514 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2515 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2516 new_head->obj_at_put(trace_names_offset, new_names());
2517 new_head->obj_at_put(trace_hidden_offset, nullptr);
2518
2519 _head = new_head();
2520 _methods = new_methods();
2521 _bcis = new_bcis();
2522 _mirrors = new_mirrors();
2523 _names = new_names();
2524 _index = 0;
2525 }
2526
2527 oop backtrace() {
2528 return _backtrace();
2529 }
2530
2531 inline void push(Method* method, int bci, TRAPS) {
2532 // Smear the -1 bci to 0 since the array only holds unsigned
2533 // shorts. The later line number lookup would just smear the -1
2534 // to a 0 even if it could be recorded.
2535 if (bci == SynchronizationEntryBCI) bci = 0;
2536
2537 if (_index >= trace_chunk_size) {
2538 methodHandle mhandle(THREAD, method);
2539 expand(CHECK);
2540 method = mhandle();
2541 }
2542
2543 _methods->ushort_at_put(_index, method->orig_method_idnum());
2544 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2545
2546 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2547 // klass owning the symbols alive so their refcounts aren't decremented.
2548 Symbol* name = method->name();
2549 _names->symbol_at_put(_index, name);
2550
2551 // We need to save the mirrors in the backtrace to keep the class
2552 // from being unloaded while we still have this stack trace.
2553 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2554 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2555
2556 _index++;
2557 }
2558
2559 void set_has_hidden_top_frame() {
2560 if (!_has_hidden_top_frame) {
2561 // It would be nice to add java/lang/Boolean::TRUE here
2562 // to indicate that this backtrace has a hidden top frame.
2563 // But this code is used before TRUE is allocated.
2564 // Therefore let's just use an arbitrary legal oop
2565 // available right here. _methods is a short[].
2566 assert(_methods != nullptr, "we need a legal oop");
2567 _has_hidden_top_frame = true;
2568 _head->obj_at_put(trace_hidden_offset, _methods);
2569 }
2570 }
2571 };
2572
2573 struct BacktraceElement : public StackObj {
2574 int _method_id;
2575 int _bci;
2576 int _version;
2577 Symbol* _name;
2578 Handle _mirror;
2579 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2580 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2581 };
2582
2583 class BacktraceIterator : public StackObj {
2584 int _index;
2585 objArrayHandle _result;
2586 objArrayHandle _mirrors;
2587 typeArrayHandle _methods;
2588 typeArrayHandle _bcis;
2589 typeArrayHandle _names;
2590
2591 void init(objArrayHandle result, Thread* thread) {
2592 // Get method id, bci, version and mirror from chunk
2593 _result = result;
2594 if (_result.not_null()) {
2595 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2596 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2597 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2598 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2599 _index = 0;
2600 }
2601 }
2602 public:
2603 BacktraceIterator(objArrayHandle result, Thread* thread) {
2604 init(result, thread);
2605 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2606 }
2607
2608 BacktraceElement next(Thread* thread) {
2609 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2610 _methods->ushort_at(_index),
2611 Backtrace::version_at(_bcis->int_at(_index)),
2612 Backtrace::bci_at(_bcis->int_at(_index)),
2613 _names->symbol_at(_index));
2614 _index++;
2615
2616 if (_index >= java_lang_Throwable::trace_chunk_size) {
2617 int next_offset = java_lang_Throwable::trace_next_offset;
2618 // Get next chunk
2619 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2620 init(result, thread);
2621 }
2622 return e;
2623 }
2624
2625 bool repeat() {
2626 return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2627 }
2628 };
2629
2630
2631 // Print stack trace element to the specified output stream.
2632 // The output is formatted into a stringStream and written to the outputStream in one step.
2633 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2634 int version, int bci, Symbol* name) {
2635 ResourceMark rm;
2636 stringStream ss;
2637
2638 InstanceKlass* holder = java_lang_Class::as_InstanceKlass(mirror());
2639 const char* klass_name = holder->external_name();
2640 char* method_name = name->as_C_string();
2641 ss.print("\tat %s.%s(", klass_name, method_name);
2642
2643 // Print module information
2644 ModuleEntry* module = holder->module();
2645 if (module->is_named()) {
2646 char* module_name = module->name()->as_C_string();
2647 if (module->version() != nullptr) {
2648 char* module_version = module->version()->as_C_string();
2649 ss.print("%s@%s/", module_name, module_version);
2650 } else {
2651 ss.print("%s/", module_name);
2652 }
2653 }
2654
2655 char* source_file_name = nullptr;
2656 Symbol* source = Backtrace::get_source_file_name(holder, version);
2657 if (source != nullptr) {
2658 source_file_name = source->as_C_string();
2659 }
2660
2661 // The method can be null if the requested class version is gone
2662 Method* method = holder->method_with_orig_idnum(method_id, version);
2663 if (!version_matches(method, version)) {
2664 ss.print("Redefined)");
2665 } else {
2666 int line_number = Backtrace::get_line_number(method, bci);
2667 if (line_number == -2) {
2668 ss.print("Native Method)");
2669 } else {
2670 if (source_file_name != nullptr && (line_number != -1)) {
2671 // Sourcename and linenumber
2672 ss.print("%s:%d)", source_file_name, line_number);
2673 } else if (source_file_name != nullptr) {
2674 // Just sourcename
2675 ss.print("%s)", source_file_name);
2676 } else {
2677 // Neither sourcename nor linenumber
2678 ss.print("Unknown Source)");
2679 }
2680 nmethod* nm = method->code();
2681 if (WizardMode && nm != nullptr) {
2682 ss.print("(nmethod " INTPTR_FORMAT ")", p2i(nm));
2683 }
2684 }
2685 }
2686
2687 ss.cr();
2688 st->print_raw(ss.freeze(), ss.size());
2689 }
2690
2691 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2692 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2693 int method_id = method->orig_method_idnum();
2694 int version = method->constants()->version();
2695 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2696 }
2697
2698 /**
2699 * Print the throwable message and its stack trace plus all causes by walking the
2700 * cause chain. The output looks the same as of Throwable.printStackTrace().
2701 */
2702 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2703 // First, print the message.
2704 print(throwable(), st);
2705 st->cr();
2706
2707 // Now print the stack trace.
2708 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2709 while (throwable.not_null()) {
2710 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2711 if (result.is_null()) {
2712 st->print_raw_cr("\t<<no stack trace available>>");
2713 return;
2714 }
2715 BacktraceIterator iter(result, THREAD);
2716
2717 while (iter.repeat()) {
2718 BacktraceElement bte = iter.next(THREAD);
2719 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2720 }
2721 if (THREAD->can_call_java()) {
2722 // Call getCause() which doesn't necessarily return the _cause field.
2723 ExceptionMark em(THREAD);
2724 JavaValue cause(T_OBJECT);
2725 JavaCalls::call_virtual(&cause,
2726 throwable,
2727 throwable->klass(),
2728 vmSymbols::getCause_name(),
2729 vmSymbols::void_throwable_signature(),
2730 THREAD);
2731 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2732 if (HAS_PENDING_EXCEPTION) {
2733 CLEAR_PENDING_EXCEPTION;
2734 throwable = Handle();
2735 } else {
2736 throwable = Handle(THREAD, cause.get_oop());
2737 if (throwable.not_null()) {
2738 st->print("Caused by: ");
2739 print(throwable(), st);
2740 st->cr();
2741 }
2742 }
2743 } else {
2744 st->print_raw_cr("<<cannot call Java to get cause>>");
2745 return;
2746 }
2747 }
2748 }
2749
2750 /**
2751 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2752 */
2753 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2754 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2755 JavaValue result(T_VOID);
2756 JavaCalls::call_virtual(&result,
2757 throwable,
2758 vmClasses::Throwable_klass(),
2759 vmSymbols::printStackTrace_name(),
2760 vmSymbols::void_method_signature(),
2761 THREAD);
2762 }
2763
2764 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2765 if (!StackTraceInThrowable) return;
2766 ResourceMark rm(THREAD);
2767
2768 // Start out by clearing the backtrace for this object, in case the VM
2769 // runs out of memory while allocating the stack trace
2770 set_backtrace(throwable(), nullptr);
2771 // Clear lazily constructed Java level stacktrace if refilling occurs
2772 // This is unnecessary in 1.7+ but harmless
2773 clear_stacktrace(throwable());
2774
2775 int max_depth = MaxJavaStackTraceDepth;
2776 JavaThread* thread = THREAD;
2777
2778 BacktraceBuilder bt(CHECK);
2779
2780 // If there is no Java frame just return the method that was being called
2781 // with bci 0
2782 if (!thread->has_last_Java_frame()) {
2783 if (max_depth >= 1 && method() != nullptr) {
2784 bt.push(method(), 0, CHECK);
2785 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2786 set_depth(throwable(), 1);
2787 set_backtrace(throwable(), bt.backtrace());
2788 }
2789 return;
2790 }
2791
2792 // Instead of using vframe directly, this version of fill_in_stack_trace
2793 // basically handles everything by hand. This significantly improved the
2794 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2795 // See bug 6333838 for more details.
2796 // The "ASSERT" here is to verify this method generates the exactly same stack
2797 // trace as utilizing vframe.
2798 #ifdef ASSERT
2799 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2800 #endif
2801 int total_count = 0;
2802 RegisterMap map(thread,
2803 RegisterMap::UpdateMap::skip,
2804 RegisterMap::ProcessFrames::skip,
2805 RegisterMap::WalkContinuation::include);
2806 int decode_offset = 0;
2807 nmethod* nm = nullptr;
2808 bool skip_fillInStackTrace_check = false;
2809 bool skip_throwableInit_check = false;
2810 bool skip_hidden = !ShowHiddenFrames;
2811 bool show_carrier = ShowCarrierFrames;
2812 ContinuationEntry* cont_entry = thread->last_continuation();
2813 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2814 Method* method = nullptr;
2815 int bci = 0;
2816
2817 // Compiled java method case.
2818 if (decode_offset != 0) {
2819 DebugInfoReadStream stream(nm, decode_offset);
2820 decode_offset = stream.read_int();
2821 method = (Method*)nm->metadata_at(stream.read_int());
2822 bci = stream.read_bci();
2823 } else {
2824 if (fr.is_first_frame()) break;
2825
2826 if (Continuation::is_continuation_enterSpecial(fr)) {
2827 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2828 if (!show_carrier && cont_entry->is_virtual_thread()) {
2829 break;
2830 }
2831 cont_entry = cont_entry->parent();
2832 }
2833
2834 address pc = fr.pc();
2835 if (fr.is_interpreted_frame()) {
2836 address bcp;
2837 if (!map.in_cont()) {
2838 bcp = fr.interpreter_frame_bcp();
2839 method = fr.interpreter_frame_method();
2840 } else {
2841 bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2842 method = map.stack_chunk()->interpreter_frame_method(fr);
2843 }
2844 bci = method->bci_from(bcp);
2845 fr = fr.sender(&map);
2846 } else {
2847 CodeBlob* cb = fr.cb();
2848 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2849 // but non nmethod
2850 fr = fr.sender(&map);
2851 if (cb == nullptr || !cb->is_nmethod()) {
2852 continue;
2853 }
2854 nm = cb->as_nmethod();
2855 assert(nm->method() != nullptr, "must be");
2856 if (nm->method()->is_native()) {
2857 method = nm->method();
2858 bci = 0;
2859 } else {
2860 PcDesc* pd = nm->pc_desc_at(pc);
2861 decode_offset = pd->scope_decode_offset();
2862 // if decode_offset is not equal to 0, it will execute the
2863 // "compiled java method case" at the beginning of the loop.
2864 continue;
2865 }
2866 }
2867 }
2868 #ifdef ASSERT
2869 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2870 assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2871 st.next();
2872 }
2873 #endif
2874
2875 // the format of the stacktrace will be:
2876 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2877 // - 0 or more <init> methods for the exception class (skipped)
2878 // - rest of the stack
2879
2880 if (!skip_fillInStackTrace_check) {
2881 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2882 throwable->is_a(method->method_holder())) {
2883 continue;
2884 }
2885 else {
2886 skip_fillInStackTrace_check = true; // gone past them all
2887 }
2888 }
2889 if (!skip_throwableInit_check) {
2890 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2891
2892 // skip <init> methods of the exception class and superclasses
2893 // This is similar to classic VM.
2894 if (method->is_object_constructor() &&
2895 throwable->is_a(method->method_holder())) {
2896 continue;
2897 } else {
2898 // there are none or we've seen them all - either way stop checking
2899 skip_throwableInit_check = true;
2900 }
2901 }
2902 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2903 if (skip_hidden) {
2904 if (total_count == 0) {
2905 // The top frame will be hidden from the stack trace.
2906 bt.set_has_hidden_top_frame();
2907 }
2908 continue;
2909 }
2910 }
2911
2912 bt.push(method, bci, CHECK);
2913 total_count++;
2914 }
2915
2916 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2917
2918 // Put completed stack trace into throwable object
2919 set_backtrace(throwable(), bt.backtrace());
2920 set_depth(throwable(), total_count);
2921 }
2922
2923 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2924 // No-op if stack trace is disabled
2925 if (!StackTraceInThrowable) {
2926 return;
2927 }
2928
2929 // Disable stack traces for some preallocated out of memory errors
2930 if (!Universe::should_fill_in_stack_trace(throwable)) {
2931 return;
2932 }
2933
2934 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2935 PreserveExceptionMark pm(THREAD);
2936
2937 fill_in_stack_trace(throwable, method, THREAD);
2938 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2939 // original exception via the PreserveExceptionMark destructor.
2940 CLEAR_PENDING_EXCEPTION;
2941 }
2942
2943 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2944 // Allocate stack trace - backtrace is created but not filled in
2945
2946 // No-op if stack trace is disabled
2947 if (!StackTraceInThrowable) return;
2948 BacktraceBuilder bt(CHECK); // creates a backtrace
2949 set_backtrace(throwable(), bt.backtrace());
2950 }
2951
2952
2953 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2954 // Fill in stack trace into preallocated backtrace (no GC)
2955
2956 // No-op if stack trace is disabled
2957 if (!StackTraceInThrowable) return;
2958
2959 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2960
2961 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2962
2963 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2964 assert(backtrace.not_null(), "backtrace should have been preallocated");
2965
2966 ResourceMark rm(THREAD);
2967 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2968
2969 BacktraceBuilder bt(THREAD, backtrace);
2970
2971 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2972 // methods as preallocated errors aren't created by "java" code.
2973
2974 // fill in as much stack trace as possible
2975 int chunk_count = 0;
2976 for (;!st.at_end(); st.next()) {
2977 bt.push(st.method(), st.bci(), CHECK);
2978 chunk_count++;
2979
2980 // Bail-out for deep stacks
2981 if (chunk_count >= trace_chunk_size) break;
2982 }
2983 set_depth(throwable(), chunk_count);
2984 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2985
2986 // We support the Throwable immutability protocol defined for Java 7.
2987 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2988 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2989 }
2990
2991 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2992 objArrayHandle stack_trace_array_h, TRAPS) {
2993
2994 if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2995 THROW(vmSymbols::java_lang_NullPointerException());
2996 }
2997
2998 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2999
3000 if (stack_trace_array_h->length() != depth) {
3001 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
3002 }
3003
3004 objArrayHandle result(THREAD, objArrayOop(backtrace()));
3005 BacktraceIterator iter(result, THREAD);
3006
3007 int index = 0;
3008 while (iter.repeat()) {
3009 BacktraceElement bte = iter.next(THREAD);
3010
3011 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
3012
3013 if (stack_trace_element.is_null()) {
3014 THROW(vmSymbols::java_lang_NullPointerException());
3015 }
3016
3017 InstanceKlass* holder = java_lang_Class::as_InstanceKlass(bte._mirror());
3018 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
3019
3020 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
3021 method,
3022 bte._version,
3023 bte._bci,
3024 bte._name,
3025 CHECK);
3026 }
3027 }
3028
3029 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
3030 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
3031 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
3032 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
3033 // symbolic stacktrace of 'throwable'.
3034 assert(throwable.not_null(), "shouldn't be");
3035
3036 // Now create the message from the original exception and thread name.
3037 ResourceMark rm(current);
3038 const char *message = nullptr;
3039 oop detailed_message = java_lang_Throwable::message(throwable());
3040 if (detailed_message != nullptr) {
3041 message = java_lang_String::as_utf8_string(detailed_message);
3042 }
3043 stringStream st;
3044 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
3045 message == nullptr ? "" : ":");
3046 if (message == nullptr) {
3047 st.print("[in thread \"%s\"]", current->name());
3048 } else {
3049 st.print("%s [in thread \"%s\"]", message, current->name());
3050 }
3051
3052 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
3053 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
3054 // If new_exception returns a different exception while creating the exception,
3055 // abandon the attempt to save the initialization error and return null.
3056 if (init_error->klass()->name() != exception_name) {
3057 log_info(class, init)("Exception %s thrown while saving initialization exception",
3058 init_error->klass()->external_name());
3059 return Handle();
3060 }
3061
3062 // Call to java to fill in the stack trace and clear declaringClassObject to
3063 // not keep classes alive in the stack trace.
3064 // call this: public StackTraceElement[] getStackTrace()
3065 JavaValue result(T_ARRAY);
3066 JavaCalls::call_virtual(&result, throwable,
3067 vmClasses::Throwable_klass(),
3068 vmSymbols::getStackTrace_name(),
3069 vmSymbols::getStackTrace_signature(),
3070 current);
3071 if (!current->has_pending_exception()){
3072 Handle stack_trace(current, result.get_oop());
3073 assert(stack_trace->is_objArray(), "Should be an array");
3074 java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
3075 // Clear backtrace because the stacktrace should be used instead.
3076 set_backtrace(init_error(), nullptr);
3077 } else {
3078 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
3079 init_error->klass()->external_name());
3080 current->clear_pending_exception();
3081 }
3082
3083 return init_error;
3084 }
3085
3086 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
3087 JavaThread* current = JavaThread::current();
3088 objArrayHandle result(current, objArrayOop(backtrace(throwable)));
3089 BacktraceIterator iter(result, current);
3090 // No backtrace available.
3091 if (!iter.repeat()) return false;
3092
3093 // If the exception happened in a frame that has been hidden, i.e.,
3094 // omitted from the back trace, we can not compute the message.
3095 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
3096 if (hidden != nullptr) {
3097 return false;
3098 }
3099
3100 // Get first backtrace element.
3101 BacktraceElement bte = iter.next(current);
3102
3103 InstanceKlass* holder = java_lang_Class::as_InstanceKlass(bte._mirror());
3104 assert(holder != nullptr, "first element should be non-null");
3105 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
3106
3107 // Original version is no longer available.
3108 if (m == nullptr || !version_matches(m, bte._version)) {
3109 return false;
3110 }
3111
3112 *method = m;
3113 *bci = bte._bci;
3114 return true;
3115 }
3116
3117 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
3118 // Allocate java.lang.StackTraceElement instance
3119 InstanceKlass* k = vmClasses::StackTraceElement_klass();
3120 assert(k != nullptr, "must be loaded in 1.4+");
3121 if (k->should_be_initialized()) {
3122 k->initialize(CHECK_NULL);
3123 }
3124
3125 Handle element = k->allocate_instance_handle(CHECK_NULL);
3126
3127 int version = method->constants()->version();
3128 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
3129 return element();
3130 }
3131
3132 void java_lang_StackTraceElement::fill_in(Handle element,
3133 InstanceKlass* holder, const methodHandle& method,
3134 int version, int bci, Symbol* name, TRAPS) {
3135 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
3136
3137 ResourceMark rm(THREAD);
3138 HandleMark hm(THREAD);
3139
3140 // Fill in class name
3141 Handle java_class(THREAD, holder->java_mirror());
3142 oop classname = java_lang_Class::name(java_class, CHECK);
3143 java_lang_StackTraceElement::set_declaringClass(element(), classname);
3144 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
3145
3146 oop loader = holder->class_loader();
3147 if (loader != nullptr) {
3148 oop loader_name = java_lang_ClassLoader::name(loader);
3149 if (loader_name != nullptr)
3150 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
3151 }
3152
3153 // Fill in method name
3154 oop methodname = StringTable::intern(name, CHECK);
3155 java_lang_StackTraceElement::set_methodName(element(), methodname);
3156
3157 // Fill in module name and version
3158 ModuleEntry* module = holder->module();
3159 if (module->is_named()) {
3160 oop module_name = StringTable::intern(module->name(), CHECK);
3161 java_lang_StackTraceElement::set_moduleName(element(), module_name);
3162 oop module_version;
3163 if (module->version() != nullptr) {
3164 module_version = StringTable::intern(module->version(), CHECK);
3165 } else {
3166 module_version = nullptr;
3167 }
3168 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
3169 }
3170
3171 if (method() == nullptr || !version_matches(method(), version)) {
3172 // The method was redefined, accurate line number information isn't available
3173 java_lang_StackTraceElement::set_fileName(element(), nullptr);
3174 java_lang_StackTraceElement::set_lineNumber(element(), -1);
3175 } else {
3176 Symbol* source;
3177 oop source_file;
3178 int line_number;
3179 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
3180
3181 java_lang_StackTraceElement::set_fileName(element(), source_file);
3182 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
3183 }
3184 }
3185
3186 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
3187 InstanceKlass* holder,
3188 int version,
3189 const methodHandle& method,
3190 int bci,
3191 Symbol*& source,
3192 oop& source_file,
3193 int& line_number, TRAPS) {
3194 // Fill in source file name and line number.
3195 source = Backtrace::get_source_file_name(holder, version);
3196 source_file = java_lang_Class::source_file(java_class());
3197 if (source != nullptr) {
3198 // Class was not redefined. We can trust its cache if set,
3199 // else we have to initialize it.
3200 if (source_file == nullptr) {
3201 source_file = StringTable::intern(source, CHECK);
3202 java_lang_Class::set_source_file(java_class(), source_file);
3203 }
3204 } else {
3205 // Class was redefined. Dump the cache if it was set.
3206 if (source_file != nullptr) {
3207 source_file = nullptr;
3208 java_lang_Class::set_source_file(java_class(), source_file);
3209 }
3210 }
3211 line_number = Backtrace::get_line_number(method(), bci);
3212 }
3213
3214 #if INCLUDE_JVMCI
3215 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
3216 Symbol*& filename, int& line_number, TRAPS) {
3217 ResourceMark rm(THREAD);
3218 HandleMark hm(THREAD);
3219
3220 filename = nullptr;
3221 line_number = -1;
3222
3223 oop source_file;
3224 int version = method->constants()->version();
3225 InstanceKlass* holder = method->method_holder();
3226 Handle java_class(THREAD, holder->java_mirror());
3227 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
3228 }
3229 #endif // INCLUDE_JVMCI
3230
3231 // java_lang_ClassFrameInfo
3232
3233 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
3234 int java_lang_ClassFrameInfo::_flags_offset;
3235
3236 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
3237 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \
3238 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false)
3239
3240 void java_lang_ClassFrameInfo::compute_offsets() {
3241 InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
3242 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3243 }
3244
3245 #if INCLUDE_CDS
3246 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
3247 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3248 }
3249 #endif
3250
3251 static int get_flags(const methodHandle& m) {
3252 int flags = m->access_flags().as_method_flags();
3253 if (m->is_object_constructor()) {
3254 flags |= java_lang_invoke_MemberName::MN_IS_OBJECT_CONSTRUCTOR;
3255 } else {
3256 // Note: Static initializers can be here. Record them as plain methods.
3257 flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
3258 }
3259 if (m->caller_sensitive()) {
3260 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
3261 }
3262 if (m->is_hidden()) {
3263 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3264 }
3265 assert((flags & 0xFF000000) == 0, "unexpected flags");
3266 return flags;
3267 }
3268
3269 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3270 return obj->obj_field(_classOrMemberName_offset);
3271 }
3272
3273 int java_lang_ClassFrameInfo::flags(oop obj) {
3274 return obj->int_field(_flags_offset);
3275 }
3276
3277 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3278 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3279 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3280 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3281 stackFrame->int_field_put(_flags_offset, flags);
3282 }
3283
3284 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3285 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3286 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3287 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3288 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3289 stackFrame->int_field_put(_flags_offset, flags);
3290 }
3291
3292
3293 // java_lang_StackFrameInfo
3294
3295 int java_lang_StackFrameInfo::_type_offset;
3296 int java_lang_StackFrameInfo::_name_offset;
3297 int java_lang_StackFrameInfo::_bci_offset;
3298 int java_lang_StackFrameInfo::_version_offset;
3299 int java_lang_StackFrameInfo::_contScope_offset;
3300
3301 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3302 macro(_type_offset, k, "type", object_signature, false); \
3303 macro(_name_offset, k, "name", string_signature, false); \
3304 macro(_bci_offset, k, "bci", int_signature, false); \
3305 macro(_contScope_offset, k, "contScope", continuationscope_signature, false)
3306
3307 void java_lang_StackFrameInfo::compute_offsets() {
3308 InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3309 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3310 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3311 }
3312
3313 #if INCLUDE_CDS
3314 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3315 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3316 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3317 }
3318 #endif
3319
3320 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3321 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3322 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3323 return method;
3324 }
3325
3326 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3327 // set Method* or mid/cpref
3328 HandleMark hm(THREAD);
3329 Handle cont_h(THREAD, cont);
3330 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3331
3332 // set bci
3333 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3334 // method may be redefined; store the version
3335 int version = method->constants()->version();
3336 assert((jushort)version == version, "version should be short");
3337 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3338
3339 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3340 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3341 }
3342
3343 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3344 ResourceMark rm(THREAD);
3345 HandleMark hm(THREAD);
3346
3347 Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3348 InstanceKlass* holder = method->method_holder();
3349 short version = stackFrame->short_field(_version_offset);
3350 int bci = stackFrame->int_field(_bci_offset);
3351 Symbol* name = method->name();
3352 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3353 }
3354
3355 oop java_lang_StackFrameInfo::type(oop obj) {
3356 return obj->obj_field(_type_offset);
3357 }
3358
3359 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3360 obj->obj_field_put(_type_offset, value);
3361 }
3362
3363 oop java_lang_StackFrameInfo::name(oop obj) {
3364 return obj->obj_field(_name_offset);
3365 }
3366
3367 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3368 obj->obj_field_put(_name_offset, value);
3369 }
3370
3371 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3372 obj->short_field_put(_version_offset, value);
3373 }
3374
3375 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3376 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3377 obj->int_field_put(_bci_offset, value);
3378 }
3379
3380 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3381 obj->obj_field_put(_contScope_offset, value);
3382 }
3383
3384 int java_lang_LiveStackFrameInfo::_monitors_offset;
3385 int java_lang_LiveStackFrameInfo::_locals_offset;
3386 int java_lang_LiveStackFrameInfo::_operands_offset;
3387 int java_lang_LiveStackFrameInfo::_mode_offset;
3388
3389 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3390 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
3391 macro(_locals_offset, k, "locals", object_array_signature, false); \
3392 macro(_operands_offset, k, "operands", object_array_signature, false); \
3393 macro(_mode_offset, k, "mode", int_signature, false)
3394
3395 void java_lang_LiveStackFrameInfo::compute_offsets() {
3396 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3397 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3398 }
3399
3400 #if INCLUDE_CDS
3401 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3402 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3403 }
3404 #endif
3405
3406 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3407 obj->obj_field_put(_monitors_offset, value);
3408 }
3409
3410 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3411 obj->obj_field_put(_locals_offset, value);
3412 }
3413
3414 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3415 obj->obj_field_put(_operands_offset, value);
3416 }
3417
3418 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3419 obj->int_field_put(_mode_offset, value);
3420 }
3421
3422
3423 // java_lang_AccessibleObject
3424
3425 int java_lang_reflect_AccessibleObject::_override_offset;
3426
3427 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3428 macro(_override_offset, k, "override", bool_signature, false)
3429
3430 void java_lang_reflect_AccessibleObject::compute_offsets() {
3431 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3432 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3433 }
3434
3435 #if INCLUDE_CDS
3436 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3437 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3438 }
3439 #endif
3440
3441 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3442 return (jboolean) reflect->bool_field(_override_offset);
3443 }
3444
3445 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3446 reflect->bool_field_put(_override_offset, (int) value);
3447 }
3448
3449 // java_lang_reflect_Method
3450
3451 int java_lang_reflect_Method::_clazz_offset;
3452 int java_lang_reflect_Method::_name_offset;
3453 int java_lang_reflect_Method::_returnType_offset;
3454 int java_lang_reflect_Method::_parameterTypes_offset;
3455 int java_lang_reflect_Method::_exceptionTypes_offset;
3456 int java_lang_reflect_Method::_slot_offset;
3457 int java_lang_reflect_Method::_modifiers_offset;
3458 int java_lang_reflect_Method::_signature_offset;
3459 int java_lang_reflect_Method::_annotations_offset;
3460 int java_lang_reflect_Method::_parameter_annotations_offset;
3461 int java_lang_reflect_Method::_annotation_default_offset;
3462
3463 #define METHOD_FIELDS_DO(macro) \
3464 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3465 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3466 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
3467 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3468 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3469 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3470 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3471 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3472 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3473 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3474 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
3475
3476 void java_lang_reflect_Method::compute_offsets() {
3477 InstanceKlass* k = vmClasses::reflect_Method_klass();
3478 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3479 }
3480
3481 #if INCLUDE_CDS
3482 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3483 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3484 }
3485 #endif
3486
3487 Handle java_lang_reflect_Method::create(TRAPS) {
3488 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3489 InstanceKlass* klass = vmClasses::reflect_Method_klass();
3490 // This class is eagerly initialized during VM initialization, since we keep a reference
3491 // to one of the methods
3492 assert(klass->is_initialized(), "must be initialized");
3493 return klass->allocate_instance_handle(THREAD);
3494 }
3495
3496 oop java_lang_reflect_Method::clazz(oop reflect) {
3497 return reflect->obj_field(_clazz_offset);
3498 }
3499
3500 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3501 reflect->obj_field_put(_clazz_offset, value);
3502 }
3503
3504 int java_lang_reflect_Method::slot(oop reflect) {
3505 return reflect->int_field(_slot_offset);
3506 }
3507
3508 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3509 reflect->int_field_put(_slot_offset, value);
3510 }
3511
3512 void java_lang_reflect_Method::set_name(oop method, oop value) {
3513 method->obj_field_put(_name_offset, value);
3514 }
3515
3516 oop java_lang_reflect_Method::return_type(oop method) {
3517 return method->obj_field(_returnType_offset);
3518 }
3519
3520 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3521 method->obj_field_put(_returnType_offset, value);
3522 }
3523
3524 oop java_lang_reflect_Method::parameter_types(oop method) {
3525 return method->obj_field(_parameterTypes_offset);
3526 }
3527
3528 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3529 method->obj_field_put(_parameterTypes_offset, value);
3530 }
3531
3532 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3533 method->obj_field_put(_exceptionTypes_offset, value);
3534 }
3535
3536 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3537 method->int_field_put(_modifiers_offset, value);
3538 }
3539
3540 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3541 method->obj_field_put(_signature_offset, value);
3542 }
3543
3544 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3545 method->obj_field_put(_annotations_offset, value);
3546 }
3547
3548 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3549 method->obj_field_put(_parameter_annotations_offset, value);
3550 }
3551
3552 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3553 method->obj_field_put(_annotation_default_offset, value);
3554 }
3555
3556 int java_lang_reflect_Constructor::_clazz_offset;
3557 int java_lang_reflect_Constructor::_parameterTypes_offset;
3558 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3559 int java_lang_reflect_Constructor::_slot_offset;
3560 int java_lang_reflect_Constructor::_modifiers_offset;
3561 int java_lang_reflect_Constructor::_signature_offset;
3562 int java_lang_reflect_Constructor::_annotations_offset;
3563 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3564
3565 #define CONSTRUCTOR_FIELDS_DO(macro) \
3566 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3567 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3568 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3569 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3570 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3571 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3572 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3573 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3574
3575 void java_lang_reflect_Constructor::compute_offsets() {
3576 InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3577 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3578 }
3579
3580 #if INCLUDE_CDS
3581 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3582 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3583 }
3584 #endif
3585
3586 Handle java_lang_reflect_Constructor::create(TRAPS) {
3587 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3588 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3589 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3590 InstanceKlass* ik = InstanceKlass::cast(k);
3591 // Ensure it is initialized
3592 ik->initialize(CHECK_NH);
3593 return ik->allocate_instance_handle(THREAD);
3594 }
3595
3596 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3597 return reflect->obj_field(_clazz_offset);
3598 }
3599
3600 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3601 reflect->obj_field_put(_clazz_offset, value);
3602 }
3603
3604 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3605 return constructor->obj_field(_parameterTypes_offset);
3606 }
3607
3608 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3609 constructor->obj_field_put(_parameterTypes_offset, value);
3610 }
3611
3612 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3613 constructor->obj_field_put(_exceptionTypes_offset, value);
3614 }
3615
3616 int java_lang_reflect_Constructor::slot(oop reflect) {
3617 return reflect->int_field(_slot_offset);
3618 }
3619
3620 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3621 reflect->int_field_put(_slot_offset, value);
3622 }
3623
3624 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3625 constructor->int_field_put(_modifiers_offset, value);
3626 }
3627
3628 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3629 constructor->obj_field_put(_signature_offset, value);
3630 }
3631
3632 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3633 constructor->obj_field_put(_annotations_offset, value);
3634 }
3635
3636 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3637 method->obj_field_put(_parameter_annotations_offset, value);
3638 }
3639
3640 int java_lang_reflect_Field::_clazz_offset;
3641 int java_lang_reflect_Field::_name_offset;
3642 int java_lang_reflect_Field::_type_offset;
3643 int java_lang_reflect_Field::_slot_offset;
3644 int java_lang_reflect_Field::_modifiers_offset;
3645 int java_lang_reflect_Field::_flags_offset;
3646 int java_lang_reflect_Field::_signature_offset;
3647 int java_lang_reflect_Field::_annotations_offset;
3648
3649 #define FIELD_FIELDS_DO(macro) \
3650 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3651 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3652 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \
3653 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3654 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3655 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3656 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3657 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3658
3659 void java_lang_reflect_Field::compute_offsets() {
3660 InstanceKlass* k = vmClasses::reflect_Field_klass();
3661 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3662 }
3663
3664 #if INCLUDE_CDS
3665 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3666 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3667 }
3668 #endif
3669
3670 Handle java_lang_reflect_Field::create(TRAPS) {
3671 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3672 Symbol* name = vmSymbols::java_lang_reflect_Field();
3673 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3674 InstanceKlass* ik = InstanceKlass::cast(k);
3675 // Ensure it is initialized
3676 ik->initialize(CHECK_NH);
3677 return ik->allocate_instance_handle(THREAD);
3678 }
3679
3680 oop java_lang_reflect_Field::clazz(oop reflect) {
3681 return reflect->obj_field(_clazz_offset);
3682 }
3683
3684 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3685 reflect->obj_field_put(_clazz_offset, value);
3686 }
3687
3688 oop java_lang_reflect_Field::name(oop field) {
3689 return field->obj_field(_name_offset);
3690 }
3691
3692 void java_lang_reflect_Field::set_name(oop field, oop value) {
3693 field->obj_field_put(_name_offset, value);
3694 }
3695
3696 oop java_lang_reflect_Field::type(oop field) {
3697 return field->obj_field(_type_offset);
3698 }
3699
3700 void java_lang_reflect_Field::set_type(oop field, oop value) {
3701 field->obj_field_put(_type_offset, value);
3702 }
3703
3704 int java_lang_reflect_Field::slot(oop reflect) {
3705 return reflect->int_field(_slot_offset);
3706 }
3707
3708 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3709 reflect->int_field_put(_slot_offset, value);
3710 }
3711
3712 int java_lang_reflect_Field::modifiers(oop field) {
3713 return field->int_field(_modifiers_offset);
3714 }
3715
3716 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3717 field->int_field_put(_modifiers_offset, value);
3718 }
3719
3720 void java_lang_reflect_Field::set_flags(oop field, int value) {
3721 field->int_field_put(_flags_offset, value);
3722 }
3723
3724 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3725 field->obj_field_put(_signature_offset, value);
3726 }
3727
3728 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3729 field->obj_field_put(_annotations_offset, value);
3730 }
3731
3732 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3733 // Allocate java.lang.reflect.RecordComponent instance
3734 HandleMark hm(THREAD);
3735 InstanceKlass* ik = vmClasses::RecordComponent_klass();
3736 assert(ik != nullptr, "must be loaded");
3737 ik->initialize(CHECK_NULL);
3738
3739 Handle element = ik->allocate_instance_handle(CHECK_NULL);
3740
3741 Handle decl_class(THREAD, holder->java_mirror());
3742 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3743
3744 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3745 oop component_name = StringTable::intern(name, CHECK_NULL);
3746 java_lang_reflect_RecordComponent::set_name(element(), component_name);
3747
3748 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3749 Handle component_type_h =
3750 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3751 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3752
3753 Method* accessor_method = nullptr;
3754 {
3755 // Prepend "()" to type to create the full method signature.
3756 ResourceMark rm(THREAD);
3757 int sig_len = type->utf8_length() + 3; // "()" and null char
3758 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3759 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3760 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3761 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3762 }
3763
3764 if (accessor_method != nullptr) {
3765 methodHandle method(THREAD, accessor_method);
3766 oop m = Reflection::new_method(method, false, CHECK_NULL);
3767 java_lang_reflect_RecordComponent::set_accessor(element(), m);
3768 } else {
3769 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3770 }
3771
3772 int sig_index = component->generic_signature_index();
3773 if (sig_index > 0) {
3774 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3775 oop component_sig = StringTable::intern(sig, CHECK_NULL);
3776 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3777 } else {
3778 java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3779 }
3780
3781 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3782 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3783
3784 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3785 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3786
3787 return element();
3788 }
3789
3790 int reflect_ConstantPool::_vmholder_offset;
3791
3792 void reflect_ConstantPool::compute_offsets() {
3793 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3794 // The field is injected and called Object vmholder in the jdk.internal.reflect.ConstantPool class.
3795 CONSTANTPOOL_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3796 }
3797
3798 #if INCLUDE_CDS
3799 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3800 CONSTANTPOOL_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3801 }
3802 #endif
3803
3804 int java_lang_reflect_Parameter::_name_offset;
3805 int java_lang_reflect_Parameter::_modifiers_offset;
3806 int java_lang_reflect_Parameter::_index_offset;
3807 int java_lang_reflect_Parameter::_executable_offset;
3808
3809 #define PARAMETER_FIELDS_DO(macro) \
3810 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3811 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3812 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \
3813 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3814
3815 void java_lang_reflect_Parameter::compute_offsets() {
3816 InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3817 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3818 }
3819
3820 #if INCLUDE_CDS
3821 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3822 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3823 }
3824 #endif
3825
3826 Handle java_lang_reflect_Parameter::create(TRAPS) {
3827 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3828 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3829 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3830 InstanceKlass* ik = InstanceKlass::cast(k);
3831 // Ensure it is initialized
3832 ik->initialize(CHECK_NH);
3833 return ik->allocate_instance_handle(THREAD);
3834 }
3835
3836 oop java_lang_reflect_Parameter::name(oop param) {
3837 return param->obj_field(_name_offset);
3838 }
3839
3840 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3841 param->obj_field_put(_name_offset, value);
3842 }
3843
3844 int java_lang_reflect_Parameter::modifiers(oop param) {
3845 return param->int_field(_modifiers_offset);
3846 }
3847
3848 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3849 param->int_field_put(_modifiers_offset, value);
3850 }
3851
3852 int java_lang_reflect_Parameter::index(oop param) {
3853 return param->int_field(_index_offset);
3854 }
3855
3856 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3857 param->int_field_put(_index_offset, value);
3858 }
3859
3860 oop java_lang_reflect_Parameter::executable(oop param) {
3861 return param->obj_field(_executable_offset);
3862 }
3863
3864 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3865 param->obj_field_put(_executable_offset, value);
3866 }
3867
3868 // java_lang_Module
3869
3870 int java_lang_Module::_loader_offset;
3871 int java_lang_Module::_name_offset;
3872 int java_lang_Module::_module_entry_offset;
3873
3874 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3875 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3876 return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3877 vmSymbols::java_lang_module_init_signature(),
3878 loader, module_name, CHECK_NH);
3879 }
3880
3881 #define MODULE_FIELDS_DO(macro) \
3882 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3883 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false)
3884
3885 void java_lang_Module::compute_offsets() {
3886 InstanceKlass* k = vmClasses::Module_klass();
3887 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3888 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3889 }
3890
3891 #if INCLUDE_CDS
3892 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3893 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3894 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3895 }
3896 #endif
3897
3898 oop java_lang_Module::loader(oop module) {
3899 return module->obj_field(_loader_offset);
3900 }
3901
3902 void java_lang_Module::set_loader(oop module, oop value) {
3903 module->obj_field_put(_loader_offset, value);
3904 }
3905
3906 oop java_lang_Module::name(oop module) {
3907 return module->obj_field(_name_offset);
3908 }
3909
3910 void java_lang_Module::set_name(oop module, oop value) {
3911 module->obj_field_put(_name_offset, value);
3912 }
3913
3914 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3915 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3916 assert(module != nullptr, "module can't be null");
3917 assert(oopDesc::is_oop(module), "module must be oop");
3918
3919 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3920 return module_entry;
3921 }
3922
3923 ModuleEntry* java_lang_Module::module_entry(oop module) {
3924 ModuleEntry* module_entry = module_entry_raw(module);
3925 if (module_entry == nullptr) {
3926 // If the inject field containing the ModuleEntry* is null then return the
3927 // class loader's unnamed module.
3928 oop loader = java_lang_Module::loader(module);
3929 Handle h_loader = Handle(Thread::current(), loader);
3930 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3931 return loader_cld->unnamed_module();
3932 }
3933 return module_entry;
3934 }
3935
3936 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3937 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3938 assert(module != nullptr, "module can't be null");
3939 assert(oopDesc::is_oop(module), "module must be oop");
3940 module->address_field_put(_module_entry_offset, (address)module_entry);
3941 }
3942
3943 Handle reflect_ConstantPool::create(TRAPS) {
3944 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3945 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3946 // Ensure it is initialized
3947 k->initialize(CHECK_NH);
3948 return k->allocate_instance_handle(THREAD);
3949 }
3950
3951
3952 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3953 assert(_vmholder_offset != 0, "Uninitialized vmholder");
3954 oop mirror = value->pool_holder()->java_mirror();
3955 // Save the mirror to get back the constant pool.
3956 reflect->obj_field_put(_vmholder_offset, mirror);
3957 }
3958
3959 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3960 assert(_vmholder_offset != 0, "Uninitialized vmholder");
3961 oop mirror = reflect->obj_field(_vmholder_offset);
3962 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(mirror);
3963
3964 // Get the constant pool back from the klass. Since class redefinition
3965 // merges the new constant pool into the old, this is essentially the
3966 // same constant pool as the original. If constant pool merging is
3967 // no longer done in the future, this will have to change to save
3968 // the original.
3969 return ik->constants();
3970 }
3971
3972
3973 // Support for java_lang_ref_Reference
3974
3975 bool java_lang_ref_Reference::_offsets_initialized;
3976
3977 int java_lang_ref_Reference::_referent_offset;
3978 int java_lang_ref_Reference::_queue_offset;
3979 int java_lang_ref_Reference::_next_offset;
3980 int java_lang_ref_Reference::_discovered_offset;
3981
3982 #define REFERENCE_FIELDS_DO(macro) \
3983 macro(_referent_offset, k, "referent", object_signature, false); \
3984 macro(_queue_offset, k, "queue", referencequeue_signature, false); \
3985 macro(_next_offset, k, "next", reference_signature, false); \
3986 macro(_discovered_offset, k, "discovered", reference_signature, false);
3987
3988 void java_lang_ref_Reference::compute_offsets() {
3989 if (_offsets_initialized) {
3990 return;
3991 }
3992 _offsets_initialized = true;
3993 InstanceKlass* k = vmClasses::Reference_klass();
3994 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3995 }
3996
3997 #if INCLUDE_CDS
3998 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3999 f->do_bool(&_offsets_initialized);
4000 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4001 }
4002 #endif
4003
4004 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
4005 assert(obj != nullptr, "sanity");
4006 if (offset != _referent_offset) {
4007 return false;
4008 }
4009
4010 Klass* k = obj->klass();
4011 if (!k->is_instance_klass()) {
4012 return false;
4013 }
4014
4015 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
4016 bool is_reference = ik->reference_type() != REF_NONE;
4017 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
4018 return is_reference;
4019 }
4020
4021 int* java_lang_boxing_object::_offsets;
4022
4023 #define BOXING_FIELDS_DO(macro) \
4024 macro(java_lang_boxing_object::_offsets[T_BOOLEAN - T_BOOLEAN], vmClasses::Boolean_klass(), "value", bool_signature, false); \
4025 macro(java_lang_boxing_object::_offsets[T_CHAR - T_BOOLEAN], vmClasses::Character_klass(), "value", char_signature, false); \
4026 macro(java_lang_boxing_object::_offsets[T_FLOAT - T_BOOLEAN], vmClasses::Float_klass(), "value", float_signature, false); \
4027 macro(java_lang_boxing_object::_offsets[T_DOUBLE - T_BOOLEAN], vmClasses::Double_klass(), "value", double_signature, false); \
4028 macro(java_lang_boxing_object::_offsets[T_BYTE - T_BOOLEAN], vmClasses::Byte_klass(), "value", byte_signature, false); \
4029 macro(java_lang_boxing_object::_offsets[T_SHORT - T_BOOLEAN], vmClasses::Short_klass(), "value", short_signature, false); \
4030 macro(java_lang_boxing_object::_offsets[T_INT - T_BOOLEAN], vmClasses::Integer_klass(), "value", int_signature, false); \
4031 macro(java_lang_boxing_object::_offsets[T_LONG - T_BOOLEAN], vmClasses::Long_klass(), "value", long_signature, false);
4032
4033 void java_lang_boxing_object::compute_offsets() {
4034 assert(T_LONG - T_BOOLEAN == 7, "Sanity check");
4035 java_lang_boxing_object::_offsets = NEW_C_HEAP_ARRAY(int, 8, mtInternal);
4036 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4037 }
4038
4039 #if INCLUDE_CDS
4040 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
4041 if (f->reading()) {
4042 assert(T_LONG - T_BOOLEAN == 7, "Sanity check");
4043 java_lang_boxing_object::_offsets = NEW_C_HEAP_ARRAY(int, 8, mtInternal);
4044 }
4045 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4046 }
4047 #endif
4048
4049 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
4050 Klass* k = vmClasses::box_klass(type);
4051 if (k == nullptr) return nullptr;
4052 InstanceKlass* ik = InstanceKlass::cast(k);
4053 if (!ik->is_initialized()) {
4054 ik->initialize(CHECK_NULL);
4055 }
4056 return ik->allocate_instance(THREAD);
4057 }
4058
4059
4060 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
4061 oop box = initialize_and_allocate(type, CHECK_NULL);
4062 if (box == nullptr) return nullptr;
4063 switch (type) {
4064 case T_BOOLEAN:
4065 box->bool_field_put(value_offset(type), value->z);
4066 break;
4067 case T_CHAR:
4068 box->char_field_put(value_offset(type), value->c);
4069 break;
4070 case T_FLOAT:
4071 box->float_field_put(value_offset(type), value->f);
4072 break;
4073 case T_DOUBLE:
4074 box->double_field_put(value_offset(type), value->d);
4075 break;
4076 case T_BYTE:
4077 box->byte_field_put(value_offset(type), value->b);
4078 break;
4079 case T_SHORT:
4080 box->short_field_put(value_offset(type), value->s);
4081 break;
4082 case T_INT:
4083 box->int_field_put(value_offset(type), value->i);
4084 break;
4085 case T_LONG:
4086 box->long_field_put(value_offset(type), value->j);
4087 break;
4088 default:
4089 return nullptr;
4090 }
4091 return box;
4092 }
4093
4094
4095 BasicType java_lang_boxing_object::basic_type(oop box) {
4096 if (box == nullptr) return T_ILLEGAL;
4097 BasicType type = vmClasses::box_klass_type(box->klass());
4098 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
4099 return T_ILLEGAL;
4100 return type;
4101 }
4102
4103
4104 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
4105 BasicType type = vmClasses::box_klass_type(box->klass());
4106 switch (type) {
4107 case T_BOOLEAN:
4108 value->z = box->bool_field(value_offset(type));
4109 break;
4110 case T_CHAR:
4111 value->c = box->char_field(value_offset(type));
4112 break;
4113 case T_FLOAT:
4114 value->f = box->float_field(value_offset(type));
4115 break;
4116 case T_DOUBLE:
4117 value->d = box->double_field(value_offset(type));
4118 break;
4119 case T_BYTE:
4120 value->b = box->byte_field(value_offset(type));
4121 break;
4122 case T_SHORT:
4123 value->s = box->short_field(value_offset(type));
4124 break;
4125 case T_INT:
4126 value->i = box->int_field(value_offset(type));
4127 break;
4128 case T_LONG:
4129 value->j = box->long_field(value_offset(type));
4130 break;
4131 default:
4132 return T_ILLEGAL;
4133 } // end switch
4134 return type;
4135 }
4136
4137
4138 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
4139 BasicType type = vmClasses::box_klass_type(box->klass());
4140 switch (type) {
4141 case T_BOOLEAN:
4142 box->bool_field_put(value_offset(type), value->z);
4143 break;
4144 case T_CHAR:
4145 box->char_field_put(value_offset(type), value->c);
4146 break;
4147 case T_FLOAT:
4148 box->float_field_put(value_offset(type), value->f);
4149 break;
4150 case T_DOUBLE:
4151 box->double_field_put(value_offset(type), value->d);
4152 break;
4153 case T_BYTE:
4154 box->byte_field_put(value_offset(type), value->b);
4155 break;
4156 case T_SHORT:
4157 box->short_field_put(value_offset(type), value->s);
4158 break;
4159 case T_INT:
4160 box->int_field_put(value_offset(type), value->i);
4161 break;
4162 case T_LONG:
4163 box->long_field_put(value_offset(type), value->j);
4164 break;
4165 default:
4166 return T_ILLEGAL;
4167 } // end switch
4168 return type;
4169 }
4170
4171
4172 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
4173 switch (type) {
4174 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
4175 case T_CHAR: st->print("%d", value->c); break;
4176 case T_BYTE: st->print("%d", value->b); break;
4177 case T_SHORT: st->print("%d", value->s); break;
4178 case T_INT: st->print("%d", value->i); break;
4179 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
4180 case T_FLOAT: st->print("%f", value->f); break;
4181 case T_DOUBLE: st->print("%lf", value->d); break;
4182 default: st->print("type %d?", type); break;
4183 }
4184 }
4185
4186
4187 // Support for java_lang_ref_SoftReference
4188 //
4189
4190 int java_lang_ref_SoftReference::_timestamp_offset;
4191 int java_lang_ref_SoftReference::_static_clock_offset;
4192
4193 #define SOFTREFERENCE_FIELDS_DO(macro) \
4194 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
4195 macro(_static_clock_offset, k, "clock", long_signature, true)
4196
4197 void java_lang_ref_SoftReference::compute_offsets() {
4198 InstanceKlass* k = vmClasses::SoftReference_klass();
4199 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4200 }
4201
4202 #if INCLUDE_CDS
4203 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
4204 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4205 }
4206 #endif
4207
4208 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
4209 return ref->long_field(_timestamp_offset);
4210 }
4211
4212 jlong java_lang_ref_SoftReference::clock() {
4213 InstanceKlass* ik = vmClasses::SoftReference_klass();
4214 oop base = ik->static_field_base_raw();
4215 return base->long_field(_static_clock_offset);
4216 }
4217
4218 void java_lang_ref_SoftReference::set_clock(jlong value) {
4219 InstanceKlass* ik = vmClasses::SoftReference_klass();
4220 oop base = ik->static_field_base_raw();
4221 base->long_field_put(_static_clock_offset, value);
4222 }
4223
4224 // Support for java_lang_invoke_DirectMethodHandle
4225
4226 int java_lang_invoke_DirectMethodHandle::_member_offset;
4227
4228 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
4229 oop member_name = nullptr;
4230 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
4231 "a DirectMethodHandle oop is expected");
4232 return dmh->obj_field(_member_offset);
4233 }
4234
4235 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
4236 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
4237
4238 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
4239 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
4240 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4241 }
4242
4243 #if INCLUDE_CDS
4244 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
4245 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4246 }
4247 #endif
4248
4249 // Support for java_lang_invoke_MethodHandle
4250
4251 int java_lang_invoke_MethodHandle::_type_offset;
4252 int java_lang_invoke_MethodHandle::_form_offset;
4253
4254 int java_lang_invoke_MemberName::_clazz_offset;
4255 int java_lang_invoke_MemberName::_name_offset;
4256 int java_lang_invoke_MemberName::_type_offset;
4257 int java_lang_invoke_MemberName::_flags_offset;
4258 int java_lang_invoke_MemberName::_method_offset;
4259 int java_lang_invoke_MemberName::_vmindex_offset;
4260
4261 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
4262 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
4263
4264 int java_lang_invoke_LambdaForm::_vmentry_offset;
4265
4266 #define METHODHANDLE_FIELDS_DO(macro) \
4267 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4268 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
4269
4270 void java_lang_invoke_MethodHandle::compute_offsets() {
4271 InstanceKlass* k = vmClasses::MethodHandle_klass();
4272 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4273 }
4274
4275 #if INCLUDE_CDS
4276 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4277 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4278 }
4279 #endif
4280
4281 #define MEMBERNAME_FIELDS_DO(macro) \
4282 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4283 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4284 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
4285 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
4286 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
4287
4288 void java_lang_invoke_MemberName::compute_offsets() {
4289 InstanceKlass* k = vmClasses::MemberName_klass();
4290 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4291 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4292 }
4293
4294 #if INCLUDE_CDS
4295 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4296 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4297 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4298 }
4299 #endif
4300
4301 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4302 macro(_vmholder_offset, k, "vmholder", class_signature, false)
4303
4304 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4305 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4306 assert(k != nullptr, "jdk mismatch");
4307 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4308 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4309 }
4310
4311 #if INCLUDE_CDS
4312 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4313 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4314 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4315 }
4316 #endif
4317
4318 #define LAMBDAFORM_FIELDS_DO(macro) \
4319 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4320
4321 void java_lang_invoke_LambdaForm::compute_offsets() {
4322 InstanceKlass* k = vmClasses::LambdaForm_klass();
4323 assert (k != nullptr, "jdk mismatch");
4324 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4325 }
4326
4327 #if INCLUDE_CDS
4328 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4329 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4330 }
4331 #endif
4332
4333 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4334 return obj != nullptr && is_subclass(obj->klass());
4335 }
4336
4337 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4338 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4339
4340 #define NEP_FIELDS_DO(macro) \
4341 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
4342 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4343
4344 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4345 return obj != nullptr && is_subclass(obj->klass());
4346 }
4347
4348 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4349 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4350 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4351 }
4352
4353 #if INCLUDE_CDS
4354 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4355 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4356 }
4357 #endif
4358
4359 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4360 return entry->obj_field(_method_type_offset);
4361 }
4362
4363 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4364 return entry->long_field(_downcall_stub_address_offset);
4365 }
4366
4367 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4368 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4369 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4370 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4371 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4372 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4373 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4374
4375 #define ABIDescriptor_FIELDS_DO(macro) \
4376 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4377 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4378 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4379 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4380 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4381 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4382 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4383
4384 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4385 return obj != nullptr && is_subclass(obj->klass());
4386 }
4387
4388 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4389 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4390 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4391 }
4392
4393 #if INCLUDE_CDS
4394 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4395 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4396 }
4397 #endif
4398
4399 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4400 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4401 }
4402
4403 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4404 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4405 }
4406
4407 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4408 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4409 }
4410
4411 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4412 return entry->int_field(_stackAlignment_offset);
4413 }
4414
4415 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4416 return entry->int_field(_shadowSpace_offset);
4417 }
4418
4419 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4420 return entry->obj_field(_scratch1_offset);
4421 }
4422
4423 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4424 return entry->obj_field(_scratch2_offset);
4425 }
4426
4427 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4428 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4429 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4430 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4431
4432 #define VMStorage_FIELDS_DO(macro) \
4433 macro(_type_offset, k, "type", byte_signature, false); \
4434 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4435 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4436 macro(_debugName_offset, k, "debugName", string_signature, false); \
4437
4438 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4439 return obj != nullptr && is_subclass(obj->klass());
4440 }
4441
4442 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4443 InstanceKlass* k = vmClasses::VMStorage_klass();
4444 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4445 }
4446
4447 #if INCLUDE_CDS
4448 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4449 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4450 }
4451 #endif
4452
4453 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4454 return entry->byte_field(_type_offset);
4455 }
4456
4457 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4458 return entry->int_field(_indexOrOffset_offset);
4459 }
4460
4461 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4462 return entry->short_field(_segmentMaskOrSize_offset);
4463 }
4464
4465 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4466 return entry->obj_field(_debugName_offset);
4467 }
4468
4469 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4470 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4471
4472 #define CallConv_FIELDS_DO(macro) \
4473 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4474 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4475
4476 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4477 return obj != nullptr && is_subclass(obj->klass());
4478 }
4479
4480 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4481 InstanceKlass* k = vmClasses::CallConv_klass();
4482 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4483 }
4484
4485 #if INCLUDE_CDS
4486 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4487 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4488 }
4489 #endif
4490
4491 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4492 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4493 }
4494
4495 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4496 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4497 }
4498
4499 oop java_lang_invoke_MethodHandle::type(oop mh) {
4500 return mh->obj_field(_type_offset);
4501 }
4502
4503 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4504 mh->obj_field_put(_type_offset, mtype);
4505 }
4506
4507 oop java_lang_invoke_MethodHandle::form(oop mh) {
4508 assert(_form_offset != 0, "");
4509 return mh->obj_field(_form_offset);
4510 }
4511
4512 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4513 assert(_form_offset != 0, "");
4514 mh->obj_field_put(_form_offset, lform);
4515 }
4516
4517 /// MemberName accessors
4518
4519 oop java_lang_invoke_MemberName::clazz(oop mname) {
4520 assert(is_instance(mname), "wrong type");
4521 return mname->obj_field(_clazz_offset);
4522 }
4523
4524 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4525 assert(is_instance(mname), "wrong type");
4526 mname->obj_field_put(_clazz_offset, clazz);
4527 }
4528
4529 oop java_lang_invoke_MemberName::name(oop mname) {
4530 assert(is_instance(mname), "wrong type");
4531 return mname->obj_field(_name_offset);
4532 }
4533
4534 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4535 assert(is_instance(mname), "wrong type");
4536 mname->obj_field_put(_name_offset, name);
4537 }
4538
4539 oop java_lang_invoke_MemberName::type(oop mname) {
4540 assert(is_instance(mname), "wrong type");
4541 return mname->obj_field(_type_offset);
4542 }
4543
4544 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4545 assert(is_instance(mname), "wrong type");
4546 mname->obj_field_put(_type_offset, type);
4547 }
4548
4549 int java_lang_invoke_MemberName::flags(oop mname) {
4550 assert(is_instance(mname), "wrong type");
4551 return mname->int_field(_flags_offset);
4552 }
4553
4554 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4555 assert(is_instance(mname), "wrong type");
4556 mname->int_field_put(_flags_offset, flags);
4557 }
4558
4559 // Return vmtarget from ResolvedMethodName method field through indirection
4560 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4561 assert(is_instance(mname), "wrong type");
4562 oop method = mname->obj_field(_method_offset);
4563 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4564 }
4565
4566 bool java_lang_invoke_MemberName::is_method(oop mname) {
4567 assert(is_instance(mname), "must be MemberName");
4568 return (flags(mname) & (MN_IS_METHOD | MN_IS_OBJECT_CONSTRUCTOR)) > 0;
4569 }
4570
4571 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4572 assert(is_instance(mname), "wrong type");
4573 mname->obj_field_put(_method_offset, resolved_method);
4574 }
4575
4576 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4577 assert(is_instance(mname), "wrong type");
4578 return (intptr_t) mname->address_field(_vmindex_offset);
4579 }
4580
4581 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4582 assert(is_instance(mname), "wrong type");
4583 mname->address_field_put(_vmindex_offset, (address) index);
4584 }
4585
4586
4587 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4588 assert(is_instance(resolved_method), "wrong type");
4589 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4590 assert(m->is_method(), "must be");
4591 return m;
4592 }
4593
4594 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4595 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4596 assert(is_instance(resolved_method), "wrong type");
4597 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4598 }
4599
4600 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4601 assert(is_instance(resolved_method), "wrong type");
4602 resolved_method->obj_field_put(_vmholder_offset, holder);
4603 }
4604
4605 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4606 const Method* method = m();
4607
4608 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4609 oop resolved_method = ResolvedMethodTable::find_method(method);
4610 if (resolved_method != nullptr) {
4611 return resolved_method;
4612 }
4613
4614 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4615 if (!k->is_initialized()) {
4616 k->initialize(CHECK_NULL);
4617 }
4618
4619 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4620
4621 NoSafepointVerifier nsv;
4622
4623 if (method->is_old()) {
4624 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4625 method->get_new_method();
4626 }
4627
4628 InstanceKlass* holder = method->method_holder();
4629
4630 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4631 // Add a reference to the loader (actually mirror because hidden classes may not have
4632 // distinct loaders) to ensure the metadata is kept alive.
4633 // This mirror may be different than the one in clazz field.
4634 set_vmholder(new_resolved_method, holder->java_mirror());
4635
4636 // Set flag in class to indicate this InstanceKlass has entries in the table
4637 // to avoid walking table during redefinition if none of the redefined classes
4638 // have any membernames in the table.
4639 holder->set_has_resolved_methods();
4640
4641 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4642 }
4643
4644 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4645 assert(is_instance(lform), "wrong type");
4646 return lform->obj_field(_vmentry_offset);
4647 }
4648
4649
4650 // Support for java_lang_invoke_MethodType
4651
4652 int java_lang_invoke_MethodType::_rtype_offset;
4653 int java_lang_invoke_MethodType::_ptypes_offset;
4654
4655 #define METHODTYPE_FIELDS_DO(macro) \
4656 macro(_rtype_offset, k, "rtype", class_signature, false); \
4657 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4658
4659 void java_lang_invoke_MethodType::compute_offsets() {
4660 InstanceKlass* k = vmClasses::MethodType_klass();
4661 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4662 }
4663
4664 #if INCLUDE_CDS
4665 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4666 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4667 }
4668 #endif
4669
4670 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4671 st->print("(");
4672 objArrayOop pts = ptypes(mt);
4673 if (pts != nullptr) {
4674 for (int i = 0, limit = pts->length(); i < limit; i++) {
4675 java_lang_Class::print_signature(pts->obj_at(i), st);
4676 }
4677 } else {
4678 st->print("null");
4679 }
4680 st->print(")");
4681 oop rt = rtype(mt);
4682 if (rt != nullptr) {
4683 java_lang_Class::print_signature(rt, st);
4684 } else {
4685 st->print("null");
4686 }
4687 }
4688
4689 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4690 ResourceMark rm;
4691 stringStream buffer(128);
4692 print_signature(mt, &buffer);
4693 const char* sigstr = buffer.base();
4694 int siglen = (int) buffer.size();
4695 Symbol *name;
4696 if (!intern_if_not_found) {
4697 name = SymbolTable::probe(sigstr, siglen);
4698 } else {
4699 name = SymbolTable::new_symbol(sigstr, siglen);
4700 }
4701 return name;
4702 }
4703
4704 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4705 if (mt1 == mt2)
4706 return true;
4707 if (rtype(mt1) != rtype(mt2))
4708 return false;
4709 if (ptype_count(mt1) != ptype_count(mt2))
4710 return false;
4711 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4712 if (ptype(mt1, i) != ptype(mt2, i))
4713 return false;
4714 }
4715 return true;
4716 }
4717
4718 oop java_lang_invoke_MethodType::rtype(oop mt) {
4719 assert(is_instance(mt), "must be a MethodType");
4720 return mt->obj_field(_rtype_offset);
4721 }
4722
4723 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4724 assert(is_instance(mt), "must be a MethodType");
4725 return (objArrayOop) mt->obj_field(_ptypes_offset);
4726 }
4727
4728 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4729 return ptypes(mt)->obj_at(idx);
4730 }
4731
4732 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4733 return ptypes(mt)->length();
4734 }
4735
4736 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4737 objArrayOop pts = ptypes(mt);
4738 int count = pts->length();
4739 int slots = 0;
4740 for (int i = 0; i < count; i++) {
4741 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4742 slots += type2size[bt];
4743 }
4744 return slots;
4745 }
4746
4747 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4748 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4749 return type2size[bt];
4750 }
4751
4752
4753 // Support for java_lang_invoke_CallSite
4754
4755 int java_lang_invoke_CallSite::_target_offset;
4756 int java_lang_invoke_CallSite::_vmdependencies_offset;
4757 int java_lang_invoke_CallSite::_last_cleanup_offset;
4758
4759 #define CALLSITE_FIELDS_DO(macro) \
4760 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
4761
4762 void java_lang_invoke_CallSite::compute_offsets() {
4763 InstanceKlass* k = vmClasses::CallSite_klass();
4764 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4765 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4766 }
4767
4768 #if INCLUDE_CDS
4769 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4770 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4771 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4772 }
4773 #endif
4774
4775 DependencyContext java_lang_invoke_CallSite::vmdependencies(oop call_site) {
4776 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4777 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4778 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4779 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4780 return dep_ctx;
4781 }
4782
4783 // Support for java_lang_invoke_ConstantCallSite
4784
4785 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4786
4787 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4788 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4789
4790 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4791 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4792 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4793 }
4794
4795 #if INCLUDE_CDS
4796 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4797 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4798 }
4799 #endif
4800
4801 // Support for java_lang_ClassLoader
4802
4803 int java_lang_ClassLoader::_loader_data_offset;
4804 int java_lang_ClassLoader::_parallelCapable_offset;
4805 int java_lang_ClassLoader::_name_offset;
4806 int java_lang_ClassLoader::_nameAndId_offset;
4807 int java_lang_ClassLoader::_unnamedModule_offset;
4808 int java_lang_ClassLoader::_parent_offset;
4809
4810 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4811 assert(loader != nullptr, "loader must not be null");
4812 assert(oopDesc::is_oop(loader), "loader must be oop");
4813 return AtomicAccess::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4814 }
4815
4816 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4817 assert(loader != nullptr, "loader must not be null");
4818 assert(oopDesc::is_oop(loader), "loader must be oop");
4819 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4820 }
4821
4822 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4823 assert(loader != nullptr, "loader must not be null");
4824 assert(oopDesc::is_oop(loader), "loader must be oop");
4825 AtomicAccess::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4826 }
4827
4828 #define CLASSLOADER_FIELDS_DO(macro) \
4829 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4830 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4831 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
4832 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4833 macro(_parent_offset, k1, "parent", classloader_signature, false)
4834
4835 void java_lang_ClassLoader::compute_offsets() {
4836 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4837 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4838
4839 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4840 }
4841
4842 #if INCLUDE_CDS
4843 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4844 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4845 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4846 }
4847 #endif
4848
4849 oop java_lang_ClassLoader::parent(oop loader) {
4850 assert(is_instance(loader), "loader must be oop");
4851 return loader->obj_field(_parent_offset);
4852 }
4853
4854 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4855 assert(is_instance(loader), "loader must be oop");
4856 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4857 }
4858
4859 // Returns the name field of this class loader. If the name field has not
4860 // been set, null will be returned.
4861 oop java_lang_ClassLoader::name(oop loader) {
4862 assert(is_instance(loader), "loader must be oop");
4863 return loader->obj_field(_name_offset);
4864 }
4865
4866 // Returns the nameAndId field of this class loader. The format is
4867 // as follows:
4868 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4869 // If the defining loader has no name then <qualified-class-name> @<id>
4870 // If built-in loader, then omit '@<id>' as there is only one instance.
4871 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4872 oop java_lang_ClassLoader::nameAndId(oop loader) {
4873 assert(is_instance(loader), "loader must be oop");
4874 return loader->obj_field(_nameAndId_offset);
4875 }
4876
4877 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4878 assert(is_instance(loader), "loader must be oop");
4879 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4880 oop acl = loader;
4881 DEBUG_ONLY(jint loop_count = 0);
4882 // This loop taken verbatim from ClassLoader.java:
4883 do {
4884 acl = parent(acl);
4885 if (cl == acl) {
4886 return true;
4887 }
4888 assert(++loop_count > 0, "loop_count overflow");
4889 } while (acl != nullptr);
4890 return false;
4891 }
4892
4893 bool java_lang_ClassLoader::is_instance(oop obj) {
4894 return obj != nullptr && is_subclass(obj->klass());
4895 }
4896
4897
4898 // For class loader classes, parallelCapable defined
4899 // based on non-null field
4900 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4901 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4902 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4903 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4904 }
4905
4906 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4907 oop cl = SystemDictionary::java_system_loader();
4908 while(cl != nullptr) {
4909 if (cl == loader) return true;
4910 cl = parent(cl);
4911 }
4912 return false;
4913 }
4914
4915 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4916 assert(is_instance(loader), "loader must be oop");
4917 return loader->obj_field(_unnamedModule_offset);
4918 }
4919
4920 // Support for java_lang_System
4921 //
4922
4923 int java_lang_System::_static_in_offset;
4924 int java_lang_System::_static_out_offset;
4925 int java_lang_System::_static_err_offset;
4926
4927 #define SYSTEM_FIELDS_DO(macro) \
4928 macro(_static_in_offset, k, "in", input_stream_signature, true); \
4929 macro(_static_out_offset, k, "out", print_stream_signature, true); \
4930 macro(_static_err_offset, k, "err", print_stream_signature, true);
4931
4932 void java_lang_System::compute_offsets() {
4933 InstanceKlass* k = vmClasses::System_klass();
4934 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4935 }
4936
4937 #if INCLUDE_CDS
4938 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4939 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4940 }
4941 #endif
4942
4943 // Support for jdk_internal_misc_UnsafeConstants
4944 //
4945 class UnsafeConstantsFixup : public FieldClosure {
4946 private:
4947 int _address_size;
4948 int _page_size;
4949 bool _big_endian;
4950 bool _use_unaligned_access;
4951 int _data_cache_line_flush_size;
4952 public:
4953 UnsafeConstantsFixup() {
4954 // round up values for all static final fields
4955 _address_size = sizeof(void*);
4956 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4957 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4958 _use_unaligned_access = UseUnalignedAccesses;
4959 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4960 }
4961
4962 void do_field(fieldDescriptor* fd) {
4963 oop mirror = fd->field_holder()->java_mirror();
4964 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4965 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4966 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4967 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4968 if (fd->name() == vmSymbols::address_size_name()) {
4969 mirror->int_field_put(fd->offset(), _address_size);
4970 } else if (fd->name() == vmSymbols::page_size_name()) {
4971 mirror->int_field_put(fd->offset(), _page_size);
4972 } else if (fd->name() == vmSymbols::big_endian_name()) {
4973 mirror->bool_field_put(fd->offset(), _big_endian);
4974 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4975 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4976 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4977 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4978 } else {
4979 assert(false, "unexpected UnsafeConstants field");
4980 }
4981 }
4982 };
4983
4984 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4985 UnsafeConstantsFixup fixup;
4986 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4987 }
4988
4989
4990 // java_lang_StackTraceElement
4991
4992 int java_lang_StackTraceElement::_methodName_offset;
4993 int java_lang_StackTraceElement::_fileName_offset;
4994 int java_lang_StackTraceElement::_lineNumber_offset;
4995 int java_lang_StackTraceElement::_moduleName_offset;
4996 int java_lang_StackTraceElement::_moduleVersion_offset;
4997 int java_lang_StackTraceElement::_classLoaderName_offset;
4998 int java_lang_StackTraceElement::_declaringClass_offset;
4999 int java_lang_StackTraceElement::_declaringClassObject_offset;
5000
5001 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
5002 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
5003 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
5004 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
5005 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
5006 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
5007 macro(_methodName_offset, k, "methodName", string_signature, false); \
5008 macro(_fileName_offset, k, "fileName", string_signature, false); \
5009 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
5010
5011 // Support for java_lang_StackTraceElement
5012 void java_lang_StackTraceElement::compute_offsets() {
5013 InstanceKlass* k = vmClasses::StackTraceElement_klass();
5014 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5015 }
5016
5017 #if INCLUDE_CDS
5018 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
5019 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5020 }
5021 #endif
5022
5023 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
5024 element->obj_field_put(_fileName_offset, value);
5025 }
5026
5027 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
5028 element->obj_field_put(_declaringClass_offset, value);
5029 }
5030
5031 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
5032 element->obj_field_put(_methodName_offset, value);
5033 }
5034
5035 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
5036 element->int_field_put(_lineNumber_offset, value);
5037 }
5038
5039 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
5040 element->obj_field_put(_moduleName_offset, value);
5041 }
5042
5043 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
5044 element->obj_field_put(_moduleVersion_offset, value);
5045 }
5046
5047 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
5048 element->obj_field_put(_classLoaderName_offset, value);
5049 }
5050
5051 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
5052 element->obj_field_put(_declaringClassObject_offset, value);
5053 }
5054
5055
5056 // java_lang_AssertionStatusDirectives
5057
5058 int java_lang_AssertionStatusDirectives::_classes_offset;
5059 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
5060 int java_lang_AssertionStatusDirectives::_packages_offset;
5061 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
5062 int java_lang_AssertionStatusDirectives::_deflt_offset;
5063
5064 // Support for java Assertions - java_lang_AssertionStatusDirectives.
5065 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
5066 macro(_classes_offset, k, "classes", string_array_signature, false); \
5067 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
5068 macro(_packages_offset, k, "packages", string_array_signature, false); \
5069 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
5070 macro(_deflt_offset, k, "deflt", bool_signature, false)
5071
5072 void java_lang_AssertionStatusDirectives::compute_offsets() {
5073 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
5074 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5075 }
5076
5077 #if INCLUDE_CDS
5078 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
5079 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5080 }
5081 #endif
5082
5083 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
5084 o->obj_field_put(_classes_offset, val);
5085 }
5086
5087 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
5088 o->obj_field_put(_classEnabled_offset, val);
5089 }
5090
5091 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
5092 o->obj_field_put(_packages_offset, val);
5093 }
5094
5095 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
5096 o->obj_field_put(_packageEnabled_offset, val);
5097 }
5098
5099 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
5100 o->bool_field_put(_deflt_offset, val);
5101 }
5102
5103 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
5104
5105 #define AOS_FIELDS_DO(macro) \
5106 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
5107
5108 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
5109 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
5110 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5111 }
5112
5113 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
5114 assert(_owner_offset != 0, "Must be initialized");
5115 return obj->obj_field(_owner_offset);
5116 }
5117
5118 #if INCLUDE_CDS
5119 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
5120 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5121 }
5122 #endif
5123
5124 int vector_VectorPayload::_payload_offset;
5125
5126 #define VECTORPAYLOAD_FIELDS_DO(macro) \
5127 macro(_payload_offset, k, "payload", object_signature, false)
5128
5129 void vector_VectorPayload::compute_offsets() {
5130 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
5131 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5132 }
5133
5134 #if INCLUDE_CDS
5135 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
5136 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5137 }
5138 #endif
5139
5140 void vector_VectorPayload::set_payload(oop o, oop val) {
5141 o->obj_field_put(_payload_offset, val);
5142 }
5143
5144 bool vector_VectorPayload::is_instance(oop obj) {
5145 return obj != nullptr && is_subclass(obj->klass());
5146 }
5147
5148 int java_lang_Integer_IntegerCache::_static_cache_offset;
5149 int java_lang_Long_LongCache::_static_cache_offset;
5150 int java_lang_Character_CharacterCache::_static_cache_offset;
5151 int java_lang_Short_ShortCache::_static_cache_offset;
5152 int java_lang_Byte_ByteCache::_static_cache_offset;
5153
5154 #define INTEGER_CACHE_FIELDS_DO(macro) \
5155 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5156
5157 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5158 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5159 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5160 }
5161
5162 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5163 oop base = ik->static_field_base_raw();
5164 return objArrayOop(base->obj_field(_static_cache_offset));
5165 }
5166
5167 Symbol* java_lang_Integer_IntegerCache::symbol() {
5168 return vmSymbols::java_lang_Integer_IntegerCache();
5169 }
5170
5171 #if INCLUDE_CDS
5172 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5173 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5174 }
5175 #endif
5176 #undef INTEGER_CACHE_FIELDS_DO
5177
5178 jint java_lang_Integer::value(oop obj) {
5179 jvalue v;
5180 java_lang_boxing_object::get_value(obj, &v);
5181 return v.i;
5182 }
5183
5184 #define LONG_CACHE_FIELDS_DO(macro) \
5185 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5186
5187 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5188 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5189 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5190 }
5191
5192 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5193 oop base = ik->static_field_base_raw();
5194 return objArrayOop(base->obj_field(_static_cache_offset));
5195 }
5196
5197 Symbol* java_lang_Long_LongCache::symbol() {
5198 return vmSymbols::java_lang_Long_LongCache();
5199 }
5200
5201 #if INCLUDE_CDS
5202 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5203 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5204 }
5205 #endif
5206 #undef LONG_CACHE_FIELDS_DO
5207
5208 jlong java_lang_Long::value(oop obj) {
5209 jvalue v;
5210 java_lang_boxing_object::get_value(obj, &v);
5211 return v.j;
5212 }
5213
5214 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5215 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5216
5217 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5218 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5219 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5220 }
5221
5222 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5223 oop base = ik->static_field_base_raw();
5224 return objArrayOop(base->obj_field(_static_cache_offset));
5225 }
5226
5227 Symbol* java_lang_Character_CharacterCache::symbol() {
5228 return vmSymbols::java_lang_Character_CharacterCache();
5229 }
5230
5231 #if INCLUDE_CDS
5232 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5233 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5234 }
5235 #endif
5236 #undef CHARACTER_CACHE_FIELDS_DO
5237
5238 jchar java_lang_Character::value(oop obj) {
5239 jvalue v;
5240 java_lang_boxing_object::get_value(obj, &v);
5241 return v.c;
5242 }
5243
5244 #define SHORT_CACHE_FIELDS_DO(macro) \
5245 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5246
5247 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5248 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5249 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5250 }
5251
5252 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5253 oop base = ik->static_field_base_raw();
5254 return objArrayOop(base->obj_field(_static_cache_offset));
5255 }
5256
5257 Symbol* java_lang_Short_ShortCache::symbol() {
5258 return vmSymbols::java_lang_Short_ShortCache();
5259 }
5260
5261 #if INCLUDE_CDS
5262 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5263 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5264 }
5265 #endif
5266 #undef SHORT_CACHE_FIELDS_DO
5267
5268 jshort java_lang_Short::value(oop obj) {
5269 jvalue v;
5270 java_lang_boxing_object::get_value(obj, &v);
5271 return v.s;
5272 }
5273
5274 #define BYTE_CACHE_FIELDS_DO(macro) \
5275 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5276
5277 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5278 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5279 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5280 }
5281
5282 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5283 oop base = ik->static_field_base_raw();
5284 return objArrayOop(base->obj_field(_static_cache_offset));
5285 }
5286
5287 Symbol* java_lang_Byte_ByteCache::symbol() {
5288 return vmSymbols::java_lang_Byte_ByteCache();
5289 }
5290
5291 #if INCLUDE_CDS
5292 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5293 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5294 }
5295 #endif
5296 #undef BYTE_CACHE_FIELDS_DO
5297
5298 jbyte java_lang_Byte::value(oop obj) {
5299 jvalue v;
5300 java_lang_boxing_object::get_value(obj, &v);
5301 return v.b;
5302 }
5303
5304 int java_lang_Boolean::_static_TRUE_offset;
5305 int java_lang_Boolean::_static_FALSE_offset;
5306
5307 #define BOOLEAN_FIELDS_DO(macro) \
5308 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5309 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5310
5311
5312 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5313 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5314 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5315 }
5316
5317 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5318 oop base = ik->static_field_base_raw();
5319 return base->obj_field(_static_TRUE_offset);
5320 }
5321
5322 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5323 oop base = ik->static_field_base_raw();
5324 return base->obj_field(_static_FALSE_offset);
5325 }
5326
5327 Symbol* java_lang_Boolean::symbol() {
5328 return vmSymbols::java_lang_Boolean();
5329 }
5330
5331 #if INCLUDE_CDS
5332 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5333 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5334 }
5335 #endif
5336 #undef BOOLEAN_CACHE_FIELDS_DO
5337
5338 jboolean java_lang_Boolean::value(oop obj) {
5339 jvalue v;
5340 java_lang_boxing_object::get_value(obj, &v);
5341 return v.z;
5342 }
5343
5344 // java_lang_reflect_RecordComponent
5345
5346 int java_lang_reflect_RecordComponent::_clazz_offset;
5347 int java_lang_reflect_RecordComponent::_name_offset;
5348 int java_lang_reflect_RecordComponent::_type_offset;
5349 int java_lang_reflect_RecordComponent::_accessor_offset;
5350 int java_lang_reflect_RecordComponent::_signature_offset;
5351 int java_lang_reflect_RecordComponent::_annotations_offset;
5352 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5353
5354 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5355 macro(_clazz_offset, k, "clazz", class_signature, false); \
5356 macro(_name_offset, k, "name", string_signature, false); \
5357 macro(_type_offset, k, "type", class_signature, false); \
5358 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5359 macro(_signature_offset, k, "signature", string_signature, false); \
5360 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5361 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5362
5363 // Support for java_lang_reflect_RecordComponent
5364 void java_lang_reflect_RecordComponent::compute_offsets() {
5365 InstanceKlass* k = vmClasses::RecordComponent_klass();
5366 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5367 }
5368
5369 #if INCLUDE_CDS
5370 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5371 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5372 }
5373 #endif
5374
5375 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5376 element->obj_field_put(_clazz_offset, value);
5377 }
5378
5379 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5380 element->obj_field_put(_name_offset, value);
5381 }
5382
5383 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5384 element->obj_field_put(_type_offset, value);
5385 }
5386
5387 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5388 element->obj_field_put(_accessor_offset, value);
5389 }
5390
5391 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5392 element->obj_field_put(_signature_offset, value);
5393 }
5394
5395 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5396 element->obj_field_put(_annotations_offset, value);
5397 }
5398
5399 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5400 element->obj_field_put(_typeAnnotations_offset, value);
5401 }
5402
5403 // java_lang_InternalError
5404 int java_lang_InternalError::_during_unsafe_access_offset;
5405
5406 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5407 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5408 }
5409
5410 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5411 return internal_error->bool_field(_during_unsafe_access_offset);
5412 }
5413
5414 void java_lang_InternalError::compute_offsets() {
5415 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5416 }
5417
5418 #if INCLUDE_CDS
5419 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5420 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5421 }
5422 #endif
5423
5424 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5425 f(java_lang_Class) \
5426 f(java_lang_String) \
5427 f(java_lang_ref_Reference) \
5428 //end
5429
5430 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5431 f(java_lang_System) \
5432 f(java_lang_ClassLoader) \
5433 f(java_lang_Throwable) \
5434 f(java_lang_Thread) \
5435 f(java_lang_Thread_FieldHolder) \
5436 f(java_lang_Thread_Constants) \
5437 f(java_lang_ThreadGroup) \
5438 f(java_lang_VirtualThread) \
5439 f(java_lang_InternalError) \
5440 f(java_lang_AssertionStatusDirectives) \
5441 f(java_lang_ref_SoftReference) \
5442 f(java_lang_invoke_MethodHandle) \
5443 f(java_lang_invoke_DirectMethodHandle) \
5444 f(java_lang_invoke_MemberName) \
5445 f(java_lang_invoke_ResolvedMethodName) \
5446 f(java_lang_invoke_LambdaForm) \
5447 f(java_lang_invoke_MethodType) \
5448 f(java_lang_invoke_CallSite) \
5449 f(java_lang_invoke_ConstantCallSite) \
5450 f(java_lang_reflect_AccessibleObject) \
5451 f(java_lang_reflect_Method) \
5452 f(java_lang_reflect_Constructor) \
5453 f(java_lang_reflect_Field) \
5454 f(java_lang_reflect_RecordComponent) \
5455 f(reflect_ConstantPool) \
5456 f(java_lang_reflect_Parameter) \
5457 f(java_lang_Module) \
5458 f(java_lang_StackTraceElement) \
5459 f(java_lang_ClassFrameInfo) \
5460 f(java_lang_StackFrameInfo) \
5461 f(java_lang_LiveStackFrameInfo) \
5462 f(jdk_internal_vm_ContinuationScope) \
5463 f(jdk_internal_vm_Continuation) \
5464 f(jdk_internal_vm_StackChunk) \
5465 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5466 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5467 f(jdk_internal_foreign_abi_ABIDescriptor) \
5468 f(jdk_internal_foreign_abi_VMStorage) \
5469 f(jdk_internal_foreign_abi_CallConv) \
5470 f(jdk_internal_misc_UnsafeConstants) \
5471 f(java_lang_boxing_object) \
5472 f(vector_VectorPayload) \
5473 //end
5474
5475 #define BASIC_JAVA_CLASSES_DO(f) \
5476 BASIC_JAVA_CLASSES_DO_PART1(f) \
5477 BASIC_JAVA_CLASSES_DO_PART2(f)
5478
5479 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5480
5481 // Compute field offsets of all the classes in this file
5482 void JavaClasses::compute_offsets() {
5483 if (CDSConfig::is_using_archive()) {
5484 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5485 JvmtiExport::has_early_class_hook_env()),
5486 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5487 // None of the classes used by the rest of this function can be replaced by
5488 // JVMTI ClassFileLoadHook.
5489 // We are safe to use the archived offsets, which have already been restored
5490 // by JavaClasses::serialize_offsets, without computing the offsets again.
5491 return;
5492 }
5493
5494 // We have already called the compute_offsets() of the
5495 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5496 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5497 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5498 }
5499
5500 #if INCLUDE_CDS
5501 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5502
5503 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5504 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5505 }
5506 #endif
5507
5508 #if INCLUDE_CDS_JAVA_HEAP
5509 bool JavaClasses::is_supported_for_archiving(oop obj) {
5510 Klass* klass = obj->klass();
5511
5512 if (!CDSConfig::is_dumping_method_handles()) {
5513 // These are supported by CDS only when CDSConfig::is_dumping_method_handles() is enabled.
5514 if (klass == vmClasses::ResolvedMethodName_klass() ||
5515 klass == vmClasses::MemberName_klass()) {
5516 return false;
5517 }
5518 }
5519
5520 if (!AOTReferenceObjSupport::is_enabled() && klass->is_subclass_of(vmClasses::Reference_klass())) {
5521 return false;
5522 }
5523
5524 return true;
5525 }
5526 #endif
5527
5528 #ifndef PRODUCT
5529
5530 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5531
5532 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5533 const char* field_sig) {
5534 EXCEPTION_MARK;
5535 fieldDescriptor fd;
5536 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5537 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5538 InstanceKlass* ik = InstanceKlass::cast(k);
5539 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5540 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5541 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5542 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5543 return false;
5544 }
5545 if (fd.is_static()) {
5546 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5547 return false;
5548 }
5549 if (fd.offset() == deserialized_offset ) {
5550 return true;
5551 } else {
5552 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5553 klass_name, field_name, deserialized_offset, fd.offset());
5554 return false;
5555 }
5556 }
5557
5558 void JavaClasses::check_offsets() {
5559 bool valid = true;
5560
5561 #define CHECK_OFFSET(klass_name, type, field_sig) \
5562 valid &= check_offset(klass_name, java_lang_boxing_object::value_offset(type), "value", field_sig)
5563
5564 CHECK_OFFSET("java/lang/Boolean", T_BOOLEAN, "Z");
5565 CHECK_OFFSET("java/lang/Character", T_CHAR, "C");
5566 CHECK_OFFSET("java/lang/Float", T_FLOAT, "F");
5567 CHECK_OFFSET("java/lang/Double", T_DOUBLE, "D");
5568 CHECK_OFFSET("java/lang/Byte", T_BYTE, "B");
5569 CHECK_OFFSET("java/lang/Short", T_SHORT, "S");
5570 CHECK_OFFSET("java/lang/Integer", T_INT, "I");
5571 CHECK_OFFSET("java/lang/Long", T_LONG, "J");
5572
5573 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5574 }
5575
5576 #endif // PRODUCT
5577
5578 int InjectedField::compute_offset() {
5579 InstanceKlass* ik = klass();
5580 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5581 if (!may_be_java && !fs.field_flags().is_injected()) {
5582 // Only look at injected fields
5583 continue;
5584 }
5585 if (fs.name() == name() && fs.signature() == signature()) {
5586 return fs.offset();
5587 }
5588 }
5589 ResourceMark rm;
5590 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)" : "");
5591 #ifndef PRODUCT
5592 ik->print();
5593 tty->print_cr("all fields:");
5594 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5595 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());
5596 }
5597 #endif //PRODUCT
5598 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5599 return -1;
5600 }
5601
5602 void javaClasses_init() {
5603 JavaClasses::compute_offsets();
5604 JavaClasses::check_offsets();
5605 }