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