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