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/archiveBuilder.hpp"
26 #include "cds/archiveHeapLoader.hpp"
27 #include "cds/cdsConfig.hpp"
28 #include "cds/heapShared.hpp"
29 #include "cds/metaspaceShared.hpp"
30 #include "classfile/altHashing.hpp"
31 #include "classfile/classLoaderData.inline.hpp"
32 #include "classfile/javaClasses.inline.hpp"
33 #include "classfile/javaClassesImpl.hpp"
34 #include "classfile/javaThreadStatus.hpp"
35 #include "classfile/moduleEntry.hpp"
36 #include "classfile/stringTable.hpp"
37 #include "classfile/symbolTable.hpp"
38 #include "classfile/systemDictionary.hpp"
39 #include "classfile/vmClasses.hpp"
40 #include "classfile/vmSymbols.hpp"
41 #include "code/debugInfo.hpp"
42 #include "code/dependencyContext.hpp"
43 #include "code/pcDesc.hpp"
44 #include "gc/shared/collectedHeap.inline.hpp"
45 #include "interpreter/interpreter.hpp"
46 #include "interpreter/linkResolver.hpp"
47 #include "jvm.h"
48 #include "logging/log.hpp"
49 #include "logging/logStream.hpp"
50 #include "memory/oopFactory.hpp"
51 #include "memory/resourceArea.hpp"
52 #include "memory/universe.hpp"
53 #include "oops/fieldInfo.hpp"
54 #include "oops/fieldStreams.inline.hpp"
55 #include "oops/flatArrayKlass.hpp"
56 #include "oops/inlineKlass.inline.hpp"
57 #include "oops/instanceKlass.inline.hpp"
58 #include "oops/instanceMirrorKlass.inline.hpp"
59 #include "oops/klass.hpp"
60 #include "oops/klass.inline.hpp"
61 #include "oops/method.inline.hpp"
62 #include "oops/objArrayKlass.hpp"
63 #include "oops/objArrayOop.inline.hpp"
64 #include "oops/oopCast.inline.hpp"
65 #include "oops/oop.inline.hpp"
66 #include "oops/symbol.hpp"
67 #include "oops/recordComponent.hpp"
68 #include "oops/typeArrayOop.inline.hpp"
69 #include "prims/jvmtiExport.hpp"
70 #include "prims/methodHandles.hpp"
71 #include "prims/resolvedMethodTable.hpp"
72 #include "runtime/continuationEntry.inline.hpp"
73 #include "runtime/continuationJavaClasses.inline.hpp"
74 #include "runtime/fieldDescriptor.inline.hpp"
75 #include "runtime/frame.inline.hpp"
76 #include "runtime/handles.inline.hpp"
77 #include "runtime/handshake.hpp"
78 #include "runtime/init.hpp"
79 #include "runtime/interfaceSupport.inline.hpp"
80 #include "runtime/java.hpp"
81 #include "runtime/javaCalls.hpp"
82 #include "runtime/javaThread.hpp"
83 #include "runtime/jniHandles.inline.hpp"
84 #include "runtime/reflectionUtils.hpp"
85 #include "runtime/safepoint.hpp"
86 #include "runtime/safepointVerifiers.hpp"
87 #include "runtime/threadSMR.hpp"
88 #include "runtime/vframe.inline.hpp"
89 #include "runtime/vm_version.hpp"
90 #include "utilities/align.hpp"
91 #include "utilities/globalDefinitions.hpp"
92 #include "utilities/growableArray.hpp"
93 #include "utilities/preserveException.hpp"
94 #include "utilities/utf8.hpp"
95 #if INCLUDE_JVMCI
96 #include "jvmci/jvmciJavaClasses.hpp"
97 #endif
98
99 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
100 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
101
102 InjectedField JavaClasses::_injected_fields[] = {
103 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
104 };
105
106 // Register native methods of Object
107 void java_lang_Object::register_natives(TRAPS) {
108 InstanceKlass* obj = vmClasses::Object_klass();
109 Method::register_native(obj, vmSymbols::hashCode_name(),
110 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
111 Method::register_native(obj, vmSymbols::wait_name(),
112 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
113 Method::register_native(obj, vmSymbols::notify_name(),
114 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
115 Method::register_native(obj, vmSymbols::notifyAll_name(),
116 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
117 Method::register_native(obj, vmSymbols::clone_name(),
118 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
119 }
120
121 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
122 return _injected_fields[(int)id].compute_offset();
123 }
124
125 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
126 *field_count = 0;
127
128 vmSymbolID sid = vmSymbols::find_sid(class_name);
129 if (sid == vmSymbolID::NO_SID) {
130 // Only well known classes can inject fields
131 return nullptr;
132 }
133
134 int count = 0;
135 int start = -1;
136
137 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
138 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \
139 count++; \
140 if (start == -1) { \
141 start = (int)InjectedFieldID::klass##_##name##_enum; \
142 } \
143 }
144 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
145 #undef LOOKUP_INJECTED_FIELD
146
147 if (start != -1) {
148 *field_count = count;
149 return _injected_fields + start;
150 }
151 return nullptr;
152 }
153
154
155 // Helpful routine for computing field offsets at run time rather than hardcoding them
156 // Finds local fields only, including static fields. Static field offsets are from the
157 // beginning of the mirror.
158 void JavaClasses::compute_offset(int &dest_offset,
159 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
160 bool is_static) {
161 fieldDescriptor fd;
162 if (ik == nullptr) {
163 ResourceMark rm;
164 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
165 vm_exit_during_initialization("Invalid layout of well-known class");
166 }
167
168 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
169 ResourceMark rm;
170 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
171 name_symbol->as_C_string(), signature_symbol->as_C_string());
172 #ifndef PRODUCT
173 // Prints all fields and offsets
174 Log(class) lt;
175 LogStream ls(lt.error());
176 ik->print_on(&ls);
177 #endif //PRODUCT
178 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
179 }
180 dest_offset = fd.offset();
181 }
182
183 // Overloading to pass name as a string.
184 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
185 const char* name_string, Symbol* signature_symbol,
186 bool is_static) {
187 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
188 if (name == nullptr) {
189 ResourceMark rm;
190 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
191 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
192 }
193 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
194 }
195
196 // java_lang_String
197
198 int java_lang_String::_value_offset;
199 int java_lang_String::_hash_offset;
200 int java_lang_String::_hashIsZero_offset;
201 int java_lang_String::_coder_offset;
202 int java_lang_String::_flags_offset;
203
204 bool java_lang_String::_initialized;
205
206
207 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
208 uint8_t* addr = flags_addr(java_string);
209 uint8_t value = Atomic::load(addr);
210 while ((value & flag_mask) == 0) {
211 uint8_t old_value = value;
212 value |= flag_mask;
213 value = Atomic::cmpxchg(addr, old_value, value);
214 if (value == old_value) return false; // Flag bit changed from 0 to 1.
215 }
216 return true; // Flag bit is already 1.
217 }
218
219 #define STRING_FIELDS_DO(macro) \
220 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
221 macro(_hash_offset, k, "hash", int_signature, false); \
222 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
223 macro(_coder_offset, k, "coder", byte_signature, false);
224
225 void java_lang_String::compute_offsets() {
226 if (_initialized) {
227 return;
228 }
229
230 InstanceKlass* k = vmClasses::String_klass();
231 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
232 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
233
234 _initialized = true;
235 }
236
237 #if INCLUDE_CDS
238 void java_lang_String::serialize_offsets(SerializeClosure* f) {
239 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
240 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
241 f->do_bool(&_initialized);
242 }
243 #endif
244
245 class CompactStringsFixup : public FieldClosure {
246 private:
247 bool _value;
248
249 public:
250 CompactStringsFixup(bool value) : _value(value) {}
251
252 void do_field(fieldDescriptor* fd) {
253 if (fd->name() == vmSymbols::compact_strings_name()) {
254 oop mirror = fd->field_holder()->java_mirror();
255 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String");
256 assert(mirror != nullptr, "String must have mirror already");
257 mirror->bool_field_put(fd->offset(), _value);
258 }
259 }
260 };
261
262 void java_lang_String::set_compact_strings(bool value) {
263 CompactStringsFixup fix(value);
264 vmClasses::String_klass()->do_local_static_fields(&fix);
265 }
266
267 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
268 assert(_initialized, "Must be initialized");
269 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
270
271 // Create the String object first, so there's a chance that the String
272 // and the char array it points to end up in the same cache line.
273 oop obj;
274 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH);
275
276 // Create the char array. The String object must be handlized here
277 // because GC can happen as a result of the allocation attempt.
278 Handle h_obj(THREAD, obj);
279 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
280 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
281
282 // Point the String at the char array
283 obj = h_obj();
284 set_value(obj, buffer);
285 // No need to zero the offset, allocation zero'ed the entire String object
286 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
287 return h_obj;
288 }
289
290 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
291 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
292 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
293 typeArrayOop buffer = value(h_obj());
294 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
295 if (is_latin1) {
296 for (int index = 0; index < length; index++) {
297 buffer->byte_at_put(index, (jbyte)unicode[index]);
298 }
299 } else {
300 for (int index = 0; index < length; index++) {
301 buffer->char_at_put(index, unicode[index]);
302 }
303 }
304
305 #ifdef ASSERT
306 {
307 ResourceMark rm;
308 size_t utf8_len = static_cast<size_t>(length);
309 char* expected = UNICODE::as_utf8(unicode, utf8_len);
310 char* actual = as_utf8_string(h_obj());
311 if (strcmp(expected, actual) != 0) {
312 fatal("Unicode conversion failure: %s --> %s", expected, actual);
313 }
314 }
315 #endif
316
317 return h_obj;
318 }
319
320 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
321 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
322 return h_obj();
323 }
324
325 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
326 if (utf8_str == nullptr) {
327 return Handle();
328 }
329 bool has_multibyte, is_latin1;
330 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
331 if (!CompactStrings) {
332 has_multibyte = true;
333 is_latin1 = false;
334 }
335
336 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
337 if (length > 0) {
338 if (!has_multibyte) {
339 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
340 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
341 } else if (is_latin1) {
342 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
343 } else {
344 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
345 }
346 }
347
348 #ifdef ASSERT
349 // This check is too strict when the input string is not a valid UTF8.
350 // For example, it may be created with arbitrary content via jni_NewStringUTF.
351 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, strlen(utf8_str), /*version_leq_47*/false)) {
352 ResourceMark rm;
353 const char* expected = utf8_str;
354 char* actual = as_utf8_string(h_obj());
355 if (strcmp(expected, actual) != 0) {
356 fatal("String conversion failure: %s --> %s", expected, actual);
357 }
358 }
359 #endif
360
361 return h_obj;
362 }
363
364 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
365 Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
366 return h_obj();
367 }
368
369 Handle java_lang_String::create_from_symbol(const Symbol* symbol, TRAPS) {
370 const char* utf8_str = (char*)symbol->bytes();
371 int utf8_len = symbol->utf8_length();
372
373 bool has_multibyte, is_latin1;
374 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
375 if (!CompactStrings) {
376 has_multibyte = true;
377 is_latin1 = false;
378 }
379
380 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
381 if (length > 0) {
382 if (!has_multibyte) {
383 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
384 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
385 } else if (is_latin1) {
386 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
387 } else {
388 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
389 }
390 }
391
392 #ifdef ASSERT
393 // This check is too strict on older classfile versions
394 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, utf8_len, /*version_leq_47*/false))
395 {
396 ResourceMark rm;
397 const char* expected = symbol->as_utf8();
398 char* actual = as_utf8_string(h_obj());
399 if (strncmp(expected, actual, utf8_len) != 0) {
400 fatal("Symbol conversion failure: %s --> %s", expected, actual);
401 }
402 }
403 #endif
404
405 return h_obj;
406 }
407
408 // Converts a C string to a Java String based on current encoding
409 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
410 assert(str != nullptr, "bad arguments");
411
412 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
413 static to_java_string_fn_t _to_java_string_fn = nullptr;
414
415 if (_to_java_string_fn == nullptr) {
416 void *lib_handle = os::native_java_library();
417 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
418 if (_to_java_string_fn == nullptr) {
419 fatal("JNU_NewStringPlatform missing");
420 }
421 }
422
423 jstring js = nullptr;
424 {
425 JavaThread* thread = THREAD;
426 HandleMark hm(thread);
427 ThreadToNativeFromVM ttn(thread);
428 js = (_to_java_string_fn)(thread->jni_environment(), str);
429 }
430
431 Handle native_platform_string(THREAD, JNIHandles::resolve(js));
432 JNIHandles::destroy_local(js); // destroy local JNIHandle.
433 return native_platform_string;
434 }
435
436 // Converts a Java String to a native C string that can be used for
437 // native OS calls.
438 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
439 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
440 static to_platform_string_fn_t _to_platform_string_fn = nullptr;
441
442 if (_to_platform_string_fn == nullptr) {
443 void *lib_handle = os::native_java_library();
444 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
445 if (_to_platform_string_fn == nullptr) {
446 fatal("GetStringPlatformChars missing");
447 }
448 }
449
450 char *native_platform_string;
451 jstring js;
452 { JavaThread* thread = THREAD;
453 js = (jstring) JNIHandles::make_local(thread, java_string());
454 HandleMark hm(thread);
455 ThreadToNativeFromVM ttn(thread);
456 JNIEnv *env = thread->jni_environment();
457 bool is_copy;
458 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
459 assert(is_copy == JNI_TRUE, "is_copy value changed");
460 }
461
462 // Uses a store barrier and therefore needs to be in vm state
463 JNIHandles::destroy_local(js);
464
465 return native_platform_string;
466 }
467
468 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
469 ResourceMark rm(THREAD);
470 return create_from_str(java_name->as_klass_external_name(), THREAD);
471 }
472
473 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
474 jchar* result = as_unicode_string_or_null(java_string, length);
475 if (result == nullptr) {
476 THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
477 }
478 return result;
479 }
480
481 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
482 typeArrayOop value = java_lang_String::value(java_string);
483 length = java_lang_String::length(java_string, value);
484 bool is_latin1 = java_lang_String::is_latin1(java_string);
485
486 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
487 if (result != nullptr) {
488 if (!is_latin1) {
489 for (int index = 0; index < length; index++) {
490 result[index] = value->char_at(index);
491 }
492 } else {
493 for (int index = 0; index < length; index++) {
494 result[index] = ((jchar) value->byte_at(index)) & 0xff;
495 }
496 }
497 }
498 return result;
499 }
500
501 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
502 // The hash and hashIsZero fields are subject to a benign data race,
503 // making it crucial to ensure that any observable result of the
504 // calculation in this method stays correct under any possible read of
505 // these fields. Necessary restrictions to allow this to be correct
506 // without explicit memory fences or similar concurrency primitives is
507 // that we can ever only write to one of these two fields for a given
508 // String instance, and that the computation is idempotent and derived
509 // from immutable state
510 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
511 if (java_lang_String::hash_is_set(java_string)) {
512 return java_string->int_field(_hash_offset);
513 }
514
515 typeArrayOop value = java_lang_String::value(java_string);
516 int length = java_lang_String::length(java_string, value);
517 bool is_latin1 = java_lang_String::is_latin1(java_string);
518
519 unsigned int hash = 0;
520 if (length > 0) {
521 if (is_latin1) {
522 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
523 } else {
524 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
525 }
526 }
527
528 if (update) {
529 if (hash != 0) {
530 java_string->int_field_put(_hash_offset, hash);
531 } else {
532 java_string->bool_field_put(_hashIsZero_offset, true);
533 }
534 }
535 return hash;
536 }
537
538 unsigned int java_lang_String::hash_code(oop java_string) {
539 return hash_code_impl(java_string, /*update=*/true);
540 }
541
542 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
543 return hash_code_impl(java_string, /*update=*/false);
544 }
545
546
547 char* java_lang_String::as_quoted_ascii(oop java_string) {
548 typeArrayOop value = java_lang_String::value(java_string);
549 int length = java_lang_String::length(java_string, value);
550 bool is_latin1 = java_lang_String::is_latin1(java_string);
551
552 if (length == 0) return nullptr;
553
554 char* result;
555 size_t result_length;
556 if (!is_latin1) {
557 jchar* base = value->char_at_addr(0);
558 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
559 result = NEW_RESOURCE_ARRAY(char, result_length);
560 UNICODE::as_quoted_ascii(base, length, result, result_length);
561 } else {
562 jbyte* base = value->byte_at_addr(0);
563 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
564 result = NEW_RESOURCE_ARRAY(char, result_length);
565 UNICODE::as_quoted_ascii(base, length, result, result_length);
566 }
567 assert(result_length >= (size_t)length + 1, "must not be shorter");
568 assert(result_length == strlen(result) + 1, "must match");
569 return result;
570 }
571
572 Symbol* java_lang_String::as_symbol(oop java_string) {
573 typeArrayOop value = java_lang_String::value(java_string);
574 int length = java_lang_String::length(java_string, value);
575 bool is_latin1 = java_lang_String::is_latin1(java_string);
576 if (!is_latin1) {
577 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
578 Symbol* sym = SymbolTable::new_symbol(base, length);
579 return sym;
580 } else {
581 ResourceMark rm;
582 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
583 size_t utf8_len = static_cast<size_t>(length);
584 const char* base = UNICODE::as_utf8(position, utf8_len);
585 Symbol* sym = SymbolTable::new_symbol(base, checked_cast<int>(utf8_len));
586 return sym;
587 }
588 }
589
590 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
591 typeArrayOop value = java_lang_String::value(java_string);
592 int length = java_lang_String::length(java_string, value);
593 bool is_latin1 = java_lang_String::is_latin1(java_string);
594 if (!is_latin1) {
595 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
596 return SymbolTable::probe_unicode(base, length);
597 } else {
598 ResourceMark rm;
599 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
600 size_t utf8_len = static_cast<size_t>(length);
601 const char* base = UNICODE::as_utf8(position, utf8_len);
602 return SymbolTable::probe(base, checked_cast<int>(utf8_len));
603 }
604 }
605
606 size_t java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
607 assert(value_equals(value, java_lang_String::value(java_string)),
608 "value must be same as java_lang_String::value(java_string)");
609 int length = java_lang_String::length(java_string, value);
610 if (length == 0) {
611 return 0;
612 }
613 if (!java_lang_String::is_latin1(java_string)) {
614 return UNICODE::utf8_length(value->char_at_addr(0), length);
615 } else {
616 return UNICODE::utf8_length(value->byte_at_addr(0), length);
617 }
618 }
619
620 size_t java_lang_String::utf8_length(oop java_string) {
621 typeArrayOop value = java_lang_String::value(java_string);
622 return utf8_length(java_string, value);
623 }
624
625 int java_lang_String::utf8_length_as_int(oop java_string) {
626 typeArrayOop value = java_lang_String::value(java_string);
627 return utf8_length_as_int(java_string, value);
628 }
629
630 int java_lang_String::utf8_length_as_int(oop java_string, typeArrayOop value) {
631 assert(value_equals(value, java_lang_String::value(java_string)),
632 "value must be same as java_lang_String::value(java_string)");
633 int length = java_lang_String::length(java_string, value);
634 if (length == 0) {
635 return 0;
636 }
637 if (!java_lang_String::is_latin1(java_string)) {
638 return UNICODE::utf8_length_as_int(value->char_at_addr(0), length);
639 } else {
640 return UNICODE::utf8_length_as_int(value->byte_at_addr(0), length);
641 }
642 }
643
644 char* java_lang_String::as_utf8_string(oop java_string) {
645 size_t length;
646 return as_utf8_string(java_string, length);
647 }
648
649 char* java_lang_String::as_utf8_string(oop java_string, size_t& length) {
650 typeArrayOop value = java_lang_String::value(java_string);
651 // `length` is used as the incoming number of characters to
652 // convert, and then set as the number of bytes in the UTF8 sequence.
653 length = java_lang_String::length(java_string, value);
654 bool is_latin1 = java_lang_String::is_latin1(java_string);
655 if (!is_latin1) {
656 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
657 return UNICODE::as_utf8(position, length);
658 } else {
659 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
660 return UNICODE::as_utf8(position, length);
661 }
662 }
663
664 // Uses a provided buffer if it's sufficiently large, otherwise allocates
665 // a resource array to fit
666 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& utf8_len) {
667 typeArrayOop value = java_lang_String::value(java_string);
668 int len = java_lang_String::length(java_string, value);
669 bool is_latin1 = java_lang_String::is_latin1(java_string);
670 if (!is_latin1) {
671 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
672 utf8_len = UNICODE::utf8_length(position, len);
673 if (utf8_len >= buflen) {
674 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
675 }
676 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
677 } else {
678 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
679 utf8_len = UNICODE::utf8_length(position, len);
680 if (utf8_len >= buflen) {
681 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
682 }
683 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
684 }
685 }
686
687 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen) {
688 assert(value_equals(value, java_lang_String::value(java_string)),
689 "value must be same as java_lang_String::value(java_string)");
690 int length = java_lang_String::length(java_string, value);
691 bool is_latin1 = java_lang_String::is_latin1(java_string);
692 if (!is_latin1) {
693 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
694 return UNICODE::as_utf8(position, length, buf, buflen);
695 } else {
696 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
697 return UNICODE::as_utf8(position, length, buf, buflen);
698 }
699 }
700
701 char* java_lang_String::as_utf8_string(oop java_string, char* buf, size_t buflen) {
702 typeArrayOop value = java_lang_String::value(java_string);
703 return as_utf8_string(java_string, value, buf, buflen);
704 }
705
706 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
707 // `length` is used as the incoming number of characters to
708 // convert, and then set as the number of bytes in the UTF8 sequence.
709 size_t length = static_cast<size_t>(len);
710 typeArrayOop value = java_lang_String::value(java_string);
711 bool is_latin1 = java_lang_String::is_latin1(java_string);
712 assert(start + len <= java_lang_String::length(java_string), "just checking");
713 if (!is_latin1) {
714 jchar* position = value->char_at_addr(start);
715 return UNICODE::as_utf8(position, length);
716 } else {
717 jbyte* position = value->byte_at_addr(start);
718 return UNICODE::as_utf8(position, length);
719 }
720 }
721
722 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen) {
723 assert(value_equals(value, java_lang_String::value(java_string)),
724 "value must be same as java_lang_String::value(java_string)");
725 assert(start + len <= java_lang_String::length(java_string), "just checking");
726 bool is_latin1 = java_lang_String::is_latin1(java_string);
727 if (!is_latin1) {
728 jchar* position = value->char_at_addr(start);
729 return UNICODE::as_utf8(position, len, buf, buflen);
730 } else {
731 jbyte* position = value->byte_at_addr(start);
732 return UNICODE::as_utf8(position, len, buf, buflen);
733 }
734 }
735
736 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
737 assert(java_string->klass() == vmClasses::String_klass(),
738 "must be java_string");
739 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
740 int length = java_lang_String::length(java_string, value);
741 if (length != len) {
742 return false;
743 }
744 bool is_latin1 = java_lang_String::is_latin1(java_string);
745 if (!is_latin1) {
746 for (int i = 0; i < len; i++) {
747 if (value->char_at(i) != chars[i]) {
748 return false;
749 }
750 }
751 } else {
752 for (int i = 0; i < len; i++) {
753 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
754 return false;
755 }
756 }
757 }
758 return true;
759 }
760
761 bool java_lang_String::equals(oop java_string, const char* utf8_string, size_t utf8_len) {
762 assert(java_string->klass() == vmClasses::String_klass(),
763 "must be java_string");
764 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
765 int length = java_lang_String::length(java_string, value);
766 int unicode_length = UTF8::unicode_length(utf8_string, utf8_len);
767 if (length != unicode_length) {
768 return false;
769 }
770 bool is_latin1 = java_lang_String::is_latin1(java_string);
771 jchar c;
772 if (!is_latin1) {
773 for (int i = 0; i < unicode_length; i++) {
774 utf8_string = UTF8::next(utf8_string, &c);
775 if (value->char_at(i) != c) {
776 return false;
777 }
778 }
779 } else {
780 for (int i = 0; i < unicode_length; i++) {
781 utf8_string = UTF8::next(utf8_string, &c);
782 if ((((jchar) value->byte_at(i)) & 0xff) != c) {
783 return false;
784 }
785 }
786 }
787 return true;
788 }
789
790 bool java_lang_String::equals(oop str1, oop str2) {
791 assert(str1->klass() == vmClasses::String_klass(),
792 "must be java String");
793 assert(str2->klass() == vmClasses::String_klass(),
794 "must be java String");
795 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
796 bool is_latin1 = java_lang_String::is_latin1(str1);
797 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
798 bool is_latin2 = java_lang_String::is_latin1(str2);
799
800 if (is_latin1 != is_latin2) {
801 // Strings with different coders are never equal.
802 return false;
803 }
804 return value_equals(value1, value2);
805 }
806
807 // Print the given string to the given outputStream, limiting the output to
808 // at most max_length of the string's characters. If the length exceeds the
809 // limit we print an abridged version of the string with the "middle" elided
810 // and replaced by " ... (N characters ommitted) ... ". If max_length is odd
811 // it is treated as max_length-1.
812 void java_lang_String::print(oop java_string, outputStream* st, int max_length) {
813 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
814 // We need at least two characters to print A ... B
815 assert(max_length > 1, "invalid max_length: %d", max_length);
816
817 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
818
819 if (value == nullptr) {
820 // This can happen if, e.g., printing a String
821 // object before its initializer has been called
822 st->print("nullptr");
823 return;
824 }
825
826 int length = java_lang_String::length(java_string, value);
827 bool is_latin1 = java_lang_String::is_latin1(java_string);
828
829 bool abridge = length > max_length;
830
831 st->print("\"");
832 for (int index = 0; index < length; index++) {
833 // If we need to abridge and we've printed half the allowed characters
834 // then jump to the tail of the string.
835 if (abridge && index >= max_length / 2) {
836 st->print(" ... (%d characters ommitted) ... ", length - 2 * (max_length / 2));
837 index = length - (max_length / 2);
838 abridge = false; // only do this once
839 }
840 jchar c = (!is_latin1) ? value->char_at(index) :
841 ((jchar) value->byte_at(index)) & 0xff;
842 if (c < ' ') {
843 st->print("\\x%02X", c); // print control characters e.g. \x0A
844 } else {
845 st->print("%c", c);
846 }
847 }
848 st->print("\"");
849
850 if (length > max_length) {
851 st->print(" (abridged) ");
852 }
853 }
854
855 // java_lang_Class
856
857 int java_lang_Class::_klass_offset;
858 int java_lang_Class::_array_klass_offset;
859 int java_lang_Class::_oop_size_offset;
860 int java_lang_Class::_static_oop_field_count_offset;
861 int java_lang_Class::_class_loader_offset;
862 int java_lang_Class::_module_offset;
863 int java_lang_Class::_protection_domain_offset;
864 int java_lang_Class::_component_mirror_offset;
865 int java_lang_Class::_init_lock_offset;
866 int java_lang_Class::_signers_offset;
867 int java_lang_Class::_name_offset;
868 int java_lang_Class::_source_file_offset;
869 int java_lang_Class::_classData_offset;
870 int java_lang_Class::_classRedefinedCount_offset;
871 int java_lang_Class::_reflectionData_offset;
872 int java_lang_Class::_modifiers_offset;
873 int java_lang_Class::_is_primitive_offset;
874
875 bool java_lang_Class::_offsets_computed = false;
876 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
877 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
878
879 #ifdef ASSERT
880 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
881 assert(fd->has_initial_value(), "caller should have checked this");
882 assert(fd->field_type() == T_OBJECT, "caller should have checked this");
883 assert(fd->signature() == vmSymbols::string_signature(), "just checking");
884 }
885 #endif
886
887 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
888 DEBUG_ONLY(assert_valid_static_string_field(fd);)
889 oop string = fd->string_initial_value(CHECK);
890 mirror()->obj_field_put(fd->offset(), string);
891 }
892
893 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
894 assert(fd->has_initial_value(), "caller should have checked this");
895 BasicType t = fd->field_type();
896 switch (t) {
897 case T_BYTE:
898 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value()));
899 break;
900 case T_BOOLEAN:
901 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value()));
902 break;
903 case T_CHAR:
904 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value()));
905 break;
906 case T_SHORT:
907 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value()));
908 break;
909 case T_INT:
910 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
911 break;
912 case T_FLOAT:
913 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
914 break;
915 case T_DOUBLE:
916 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
917 break;
918 case T_LONG:
919 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
920 break;
921 default:
922 // Illegal ConstantValue attribute in class file should have been
923 // caught during classfile parsing.
924 ShouldNotReachHere();
925 }
926 }
927
928 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
929 assert(mirror.not_null() && fd->is_static(), "just checking");
930 if (fd->has_initial_value()) {
931 if (fd->field_type() != T_OBJECT) {
932 initialize_static_primitive_field(fd, mirror);
933 } else {
934 initialize_static_string_field(fd, mirror, CHECK);
935 }
936 }
937 }
938
939 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
940 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
941
942 // If the offset was read from the shared archive, it was fixed up already
943 if (!k->is_shared()) {
944 if (k->is_instance_klass()) {
945 // During bootstrap, java.lang.Class wasn't loaded so static field
946 // offsets were computed without the size added it. Go back and
947 // update all the static field offsets to included the size.
948
949 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
950 // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
951 // static fields offsets are updated in this array before reencoding everything into
952 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
953
954 int java_fields;
955 int injected_fields;
956 InstanceKlass* ik = InstanceKlass::cast(k);
957 GrowableArray<FieldInfo>* fields =
958 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
959 &java_fields, &injected_fields);
960 for (int i = 0; i < fields->length(); i++) {
961 FieldInfo* fi = fields->adr_at(i);
962 if (fi->access_flags().is_static()) {
963 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
964 }
965 }
966 Array<u1>* old_stream = ik->fieldinfo_stream();
967 assert(fields->length() == (java_fields + injected_fields), "Must be");
968 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
969 ik->set_fieldinfo_stream(new_fis);
970 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
971 }
972 }
973
974 if (k->is_shared() && k->has_archived_mirror_index()) {
975 if (ArchiveHeapLoader::is_in_use()) {
976 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
977 assert(present, "Missing archived mirror for %s", k->external_name());
978 return;
979 } else {
980 k->clear_java_mirror_handle();
981 k->clear_archived_mirror_index();
982 }
983 }
984 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
985 }
986
987 void java_lang_Class::initialize_mirror_fields(Klass* k,
988 Handle mirror,
989 Handle protection_domain,
990 Handle classData,
991 TRAPS) {
992 // Allocate a simple java object for a lock.
993 // This needs to be a java object because during class initialization
994 // it can be held across a java call.
995 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
996 set_init_lock(mirror(), r);
997
998 // Set protection domain also
999 set_protection_domain(mirror(), protection_domain());
1000
1001 // Initialize static fields
1002 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
1003
1004 // Set classData
1005 set_class_data(mirror(), classData());
1006 }
1007
1008 // Set the java.lang.Module module field in the java_lang_Class mirror
1009 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
1010 if (module.is_null()) {
1011 // During startup, the module may be null only if java.base has not been defined yet.
1012 // Put the class on the fixup_module_list to patch later when the java.lang.Module
1013 // for java.base is known. But note that since we captured the null module another
1014 // thread may have completed that initialization.
1015
1016 bool javabase_was_defined = false;
1017 {
1018 MutexLocker m1(current, Module_lock);
1019 // Keep list of classes needing java.base module fixup
1020 if (!ModuleEntryTable::javabase_defined()) {
1021 assert(k->java_mirror() != nullptr, "Class's mirror is null");
1022 k->class_loader_data()->inc_keep_alive_ref_count();
1023 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
1024 fixup_module_field_list()->push(k);
1025 } else {
1026 javabase_was_defined = true;
1027 }
1028 }
1029
1030 // If java.base was already defined then patch this particular class with java.base.
1031 if (javabase_was_defined) {
1032 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
1033 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr,
1034 "Setting class module field, " JAVA_BASE_NAME " should be defined");
1035 Handle javabase_handle(current, javabase_entry->module());
1036 set_module(mirror(), javabase_handle());
1037 }
1038 } else {
1039 assert(Universe::is_module_initialized() ||
1040 (ModuleEntryTable::javabase_defined() &&
1041 (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
1042 "Incorrect java.lang.Module specification while creating mirror");
1043 set_module(mirror(), module());
1044 }
1045 }
1046
1047 // Statically allocate fixup lists because they always get created.
1048 void java_lang_Class::allocate_fixup_lists() {
1049 GrowableArray<Klass*>* mirror_list =
1050 new (mtClass) GrowableArray<Klass*>(40, mtClass);
1051 set_fixup_mirror_list(mirror_list);
1052
1053 GrowableArray<Klass*>* module_list =
1054 new (mtModule) GrowableArray<Klass*>(500, mtModule);
1055 set_fixup_module_field_list(module_list);
1056 }
1057
1058 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
1059 Handle& mirror, Handle& comp_mirror, TRAPS) {
1060 // Allocate mirror (java.lang.Class instance)
1061 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
1062 mirror = Handle(THREAD, mirror_oop);
1063
1064 // Setup indirection from mirror->klass
1065 set_klass(mirror(), k);
1066
1067 // Set the modifiers flag.
1068 u2 computed_modifiers = k->compute_modifier_flags();
1069 set_modifiers(mirror(), computed_modifiers);
1070
1071 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
1072 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
1073
1074 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
1075
1076 // It might also have a component mirror. This mirror must already exist.
1077 if (k->is_array_klass()) {
1078 if (k->is_flatArray_klass()) {
1079 Klass* element_klass = (Klass*) FlatArrayKlass::cast(k)->element_klass();
1080 assert(element_klass->is_inline_klass(), "Must be inline type component");
1081 if (is_scratch) {
1082 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1083 } else {
1084 comp_mirror = Handle(THREAD, element_klass->java_mirror());
1085 }
1086 } else if (k->is_typeArray_klass()) {
1087 BasicType type = TypeArrayKlass::cast(k)->element_type();
1088 if (is_scratch) {
1089 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
1090 } else {
1091 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
1092 }
1093 } else {
1094 assert(k->is_objArray_klass(), "Must be");
1095 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1096 assert(element_klass != nullptr, "Must have an element klass");
1097 oop comp_oop = element_klass->java_mirror();
1098 if (is_scratch) {
1099 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1100 } else {
1101 comp_mirror = Handle(THREAD, comp_oop);
1102 }
1103 }
1104 assert(comp_mirror() != nullptr, "must have a mirror");
1105
1106 // Two-way link between the array klass and its component mirror:
1107 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1108 set_component_mirror(mirror(), comp_mirror());
1109 // See below for ordering dependencies between field array_klass in component mirror
1110 // and java_mirror in this klass.
1111 } else {
1112 assert(k->is_instance_klass(), "Must be");
1113
1114 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD);
1115 if (HAS_PENDING_EXCEPTION) {
1116 // If any of the fields throws an exception like OOM remove the klass field
1117 // from the mirror so GC doesn't follow it after the klass has been deallocated.
1118 // This mirror looks like a primitive type, which logically it is because it
1119 // it represents no class.
1120 set_klass(mirror(), nullptr);
1121 return;
1122 }
1123 }
1124 }
1125
1126 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1127 Handle module, Handle protection_domain,
1128 Handle classData, TRAPS) {
1129 assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1130 assert(k->java_mirror() == nullptr, "should only assign mirror once");
1131
1132 // Class_klass has to be loaded because it is used to allocate
1133 // the mirror.
1134 if (vmClasses::Class_klass_loaded()) {
1135 Handle mirror;
1136 Handle comp_mirror;
1137
1138 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1139
1140 // set the classLoader field in the java_lang_Class instance
1141 assert(class_loader() == k->class_loader(), "should be same");
1142 set_class_loader(mirror(), class_loader());
1143
1144 // Setup indirection from klass->mirror
1145 // after any exceptions can happen during allocations.
1146 k->set_java_mirror(mirror);
1147
1148 // Set the module field in the java_lang_Class instance. This must be done
1149 // after the mirror is set.
1150 set_mirror_module_field(THREAD, k, mirror, module);
1151
1152 if (comp_mirror() != nullptr) {
1153 // Set after k->java_mirror() is published, because compiled code running
1154 // concurrently doesn't expect a k to have a null java_mirror.
1155 release_set_array_klass(comp_mirror(), k);
1156 }
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(cds, 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, cds, heap, mirror)) {
1246 ResourceMark rm(THREAD);
1247 log_trace(cds, 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_is_primitive(java_class);
1386 return java_class;
1387 }
1388
1389 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1390 assert(is_instance(java_class), "must be a Class object");
1391 java_class->metadata_field_put(_klass_offset, klass);
1392 }
1393
1394
1395 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1396 assert(is_instance(java_class), "must be a Class object");
1397 Symbol* name = nullptr;
1398 bool is_instance = false;
1399 if (is_primitive(java_class)) {
1400 name = vmSymbols::type_signature(primitive_type(java_class));
1401 } else {
1402 Klass* k = as_Klass(java_class);
1403 is_instance = k->is_instance_klass();
1404 name = k->name();
1405 }
1406 if (name == nullptr) {
1407 st->print("<null>");
1408 return;
1409 }
1410 if (is_instance) {
1411 st->print("L");
1412 }
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 if (klass->is_flatArray_klass() || (ArrayKlass::cast(klass)->is_null_free_array_klass())) {
1472 // TODO 8336006 Ignore flat / null-free arrays
1473 return;
1474 }
1475 java_class->release_metadata_field_put(_array_klass_offset, klass);
1476 }
1477
1478
1479 BasicType java_lang_Class::primitive_type(oop java_class) {
1480 assert(is_primitive(java_class), "just checking");
1481 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1482 BasicType type = T_VOID;
1483 if (ak != nullptr) {
1484 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1485 type = ArrayKlass::cast(ak)->element_type();
1486 } else {
1487 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1488 }
1489 #ifdef ASSERT
1490 if (CDSConfig::is_dumping_heap()) {
1491 oop mirror = Universe::java_mirror(type);
1492 oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1493 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1494 } else {
1495 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1496 }
1497 #endif
1498 return type;
1499 }
1500
1501 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1502 assert(is_instance(java_class), "must be a Class object");
1503 if (is_primitive(java_class)) {
1504 if (reference_klass != nullptr)
1505 (*reference_klass) = nullptr;
1506 return primitive_type(java_class);
1507 } else {
1508 if (reference_klass != nullptr)
1509 (*reference_klass) = as_Klass(java_class);
1510 return T_OBJECT;
1511 }
1512 }
1513
1514
1515 oop java_lang_Class::primitive_mirror(BasicType t) {
1516 oop mirror = Universe::java_mirror(t);
1517 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1518 assert(is_primitive(mirror), "must be primitive");
1519 return mirror;
1520 }
1521
1522 #define CLASS_FIELDS_DO(macro) \
1523 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1524 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1525 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1526 macro(_module_offset, k, "module", module_signature, false); \
1527 macro(_name_offset, k, "name", string_signature, false); \
1528 macro(_classData_offset, k, "classData", object_signature, false); \
1529 macro(_reflectionData_offset, k, "reflectionData", java_lang_ref_SoftReference_signature, false); \
1530 macro(_signers_offset, k, "signers", object_array_signature, false); \
1531 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), char_signature, false); \
1532 macro(_protection_domain_offset, k, "protectionDomain", java_security_ProtectionDomain_signature, false); \
1533 macro(_is_primitive_offset, k, "primitive", bool_signature, false);
1534
1535 void java_lang_Class::compute_offsets() {
1536 if (_offsets_computed) {
1537 return;
1538 }
1539
1540 _offsets_computed = true;
1541
1542 InstanceKlass* k = vmClasses::Class_klass();
1543 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1544 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1545 }
1546
1547 #if INCLUDE_CDS
1548 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1549 f->do_bool(&_offsets_computed);
1550
1551 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1552
1553 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1554 }
1555 #endif
1556
1557 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1558 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1559 return the_class_mirror->int_field(_classRedefinedCount_offset);
1560 }
1561
1562 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1563 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1564 the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1565 }
1566
1567 int java_lang_Class::modifiers(oop the_class_mirror) {
1568 assert(_modifiers_offset != 0, "offsets should have been initialized");
1569 return the_class_mirror->char_field(_modifiers_offset);
1570 }
1571
1572 void java_lang_Class::set_modifiers(oop the_class_mirror, u2 value) {
1573 assert(_modifiers_offset != 0, "offsets should have been initialized");
1574 the_class_mirror->char_field_put(_modifiers_offset, value);
1575 }
1576
1577
1578 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1579 // platform thread structure, and a eetop offset which was used for thread
1580 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1581 // merged, so in the HotSpot VM we just use the eetop field for the thread
1582 // instead of the privateInfo_offset.
1583 //
1584 // Note: The stackSize field is only present starting in 1.4.
1585
1586 int java_lang_Thread_FieldHolder::_group_offset;
1587 int java_lang_Thread_FieldHolder::_priority_offset;
1588 int java_lang_Thread_FieldHolder::_stackSize_offset;
1589 int java_lang_Thread_FieldHolder::_daemon_offset;
1590 int java_lang_Thread_FieldHolder::_thread_status_offset;
1591
1592 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1593 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1594 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1595 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1596 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1597 macro(_thread_status_offset, k, "threadStatus", int_signature, false)
1598
1599 void java_lang_Thread_FieldHolder::compute_offsets() {
1600 assert(_group_offset == 0, "offsets should be initialized only once");
1601
1602 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1603 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1604 }
1605
1606 #if INCLUDE_CDS
1607 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1608 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1609 }
1610 #endif
1611
1612 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1613 return holder->obj_field(_group_offset);
1614 }
1615
1616 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1617 return (ThreadPriority)holder->int_field(_priority_offset);
1618 }
1619
1620 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1621 holder->int_field_put(_priority_offset, priority);
1622 }
1623
1624 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1625 return holder->long_field(_stackSize_offset);
1626 }
1627
1628 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1629 return holder->bool_field(_daemon_offset) != 0;
1630 }
1631
1632 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1633 assert(val, "daemon status is never turned off");
1634 holder->bool_field_put(_daemon_offset, val);
1635 }
1636
1637 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1638 holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1639 }
1640
1641 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1642 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1643 }
1644
1645
1646 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1647
1648 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1649 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true);
1650
1651 void java_lang_Thread_Constants::compute_offsets() {
1652 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1653
1654 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1655 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1656 }
1657
1658 #if INCLUDE_CDS
1659 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1660 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1661 }
1662 #endif
1663
1664 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1665 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1666 oop base = k->static_field_base_raw();
1667 return base->obj_field(_static_VTHREAD_GROUP_offset);
1668 }
1669
1670
1671 int java_lang_Thread::_holder_offset;
1672 int java_lang_Thread::_name_offset;
1673 int java_lang_Thread::_contextClassLoader_offset;
1674 int java_lang_Thread::_eetop_offset;
1675 int java_lang_Thread::_jvmti_thread_state_offset;
1676 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1677 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1678 int java_lang_Thread::_interrupted_offset;
1679 int java_lang_Thread::_interruptLock_offset;
1680 int java_lang_Thread::_tid_offset;
1681 int java_lang_Thread::_continuation_offset;
1682 int java_lang_Thread::_park_blocker_offset;
1683 int java_lang_Thread::_scopedValueBindings_offset;
1684 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1685
1686 #define THREAD_FIELDS_DO(macro) \
1687 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \
1688 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1689 macro(_contextClassLoader_offset, k, "contextClassLoader", classloader_signature, false); \
1690 macro(_eetop_offset, k, "eetop", long_signature, false); \
1691 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1692 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \
1693 macro(_tid_offset, k, "tid", long_signature, false); \
1694 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1695 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1696 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1697
1698 void java_lang_Thread::compute_offsets() {
1699 assert(_holder_offset == 0, "offsets should be initialized only once");
1700
1701 InstanceKlass* k = vmClasses::Thread_klass();
1702 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1703 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1704 }
1705
1706 #if INCLUDE_CDS
1707 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1708 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1709 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1710 }
1711 #endif
1712
1713 JavaThread* java_lang_Thread::thread(oop java_thread) {
1714 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1715 }
1716
1717 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1718 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1719 }
1720
1721 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1722 java_thread->address_field_put(_eetop_offset, (address)thread);
1723 }
1724
1725 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1726 java_thread->release_address_field_put(_eetop_offset, (address)thread);
1727 }
1728
1729 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1730 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1731 }
1732
1733 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1734 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1735 }
1736
1737 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1738 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1739 }
1740
1741 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1742 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1743 int val = VTMS_transition_disable_count(java_thread);
1744 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1745 }
1746
1747 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1748 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1749 int val = VTMS_transition_disable_count(java_thread);
1750 assert(val > 0, "VTMS_transition_disable_count should never be negative");
1751 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1752 }
1753
1754 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1755 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1756 }
1757
1758 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1759 assert(is_in_VTMS_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside");
1760 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1761 }
1762
1763 int java_lang_Thread::is_in_VTMS_transition_offset() {
1764 return _jvmti_is_in_VTMS_transition_offset;
1765 }
1766
1767 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1768 assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1769 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1770 }
1771
1772 oop java_lang_Thread::holder(oop java_thread) {
1773 // Note: may return null if the thread is still attaching
1774 return java_thread->obj_field(_holder_offset);
1775 }
1776 oop java_lang_Thread::interrupt_lock(oop java_thread) {
1777 return java_thread->obj_field(_interruptLock_offset);
1778 }
1779
1780 bool java_lang_Thread::interrupted(oop java_thread) {
1781 // Make sure the caller can safely access oops.
1782 assert(Thread::current()->is_VM_thread() ||
1783 (JavaThread::current()->thread_state() != _thread_blocked &&
1784 JavaThread::current()->thread_state() != _thread_in_native),
1785 "Unsafe access to oop");
1786 return java_thread->bool_field_volatile(_interrupted_offset);
1787 }
1788
1789 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1790 // Make sure the caller can safely access oops.
1791 assert(Thread::current()->is_VM_thread() ||
1792 (JavaThread::current()->thread_state() != _thread_blocked &&
1793 JavaThread::current()->thread_state() != _thread_in_native),
1794 "Unsafe access to oop");
1795 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1796 }
1797
1798
1799 oop java_lang_Thread::name(oop java_thread) {
1800 return java_thread->obj_field(_name_offset);
1801 }
1802
1803
1804 void java_lang_Thread::set_name(oop java_thread, oop name) {
1805 java_thread->obj_field_put(_name_offset, name);
1806 }
1807
1808 // Convenience macros for setting and getting Thread fields that
1809 // are actually stored in the FieldHolder object of the thread.
1810 // The FieldHolder can be null whilst a thread is attaching via
1811 // JNI, and when the main thread is attaching.
1812
1813 // The default value should be the default/zero initialized value
1814 // of the field as it would be in java.lang.Thread.FieldHolder.
1815 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \
1816 { \
1817 oop holder = java_lang_Thread::holder(java_thread); \
1818 if (holder != nullptr) \
1819 return java_lang_Thread_FieldHolder::field(holder); \
1820 else \
1821 return default_val; \
1822 }
1823
1824 // We should never be trying to set a field of an attaching thread.
1825 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \
1826 { \
1827 oop holder = java_lang_Thread::holder(java_thread); \
1828 assert(holder != nullptr, "Thread not fully initialized"); \
1829 java_lang_Thread_FieldHolder::set_##field(holder, value); \
1830 }
1831
1832
1833 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1834 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1835 }
1836
1837
1838 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1839 SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1840 }
1841
1842
1843 oop java_lang_Thread::threadGroup(oop java_thread) {
1844 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1845 }
1846
1847
1848 bool java_lang_Thread::is_alive(oop java_thread) {
1849 JavaThread* thr = java_lang_Thread::thread(java_thread);
1850 return (thr != nullptr);
1851 }
1852
1853
1854 bool java_lang_Thread::is_daemon(oop java_thread) {
1855 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1856 }
1857
1858
1859 void java_lang_Thread::set_daemon(oop java_thread) {
1860 SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1861 }
1862
1863 oop java_lang_Thread::context_class_loader(oop java_thread) {
1864 return java_thread->obj_field(_contextClassLoader_offset);
1865 }
1866
1867
1868 jlong java_lang_Thread::stackSize(oop java_thread) {
1869 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1870 }
1871
1872 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1873 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1874 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1875 }
1876
1877 // Read thread status value from threadStatus field in java.lang.Thread java class.
1878 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1879 // Make sure the caller is operating on behalf of the VM or is
1880 // running VM code (state == _thread_in_vm).
1881 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1882 JavaThread::current()->thread_state() == _thread_in_vm,
1883 "Java Thread is not running in vm");
1884 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1885 }
1886
1887 ByteSize java_lang_Thread::thread_id_offset() {
1888 return in_ByteSize(_tid_offset);
1889 }
1890
1891 oop java_lang_Thread::park_blocker(oop java_thread) {
1892 return java_thread->obj_field(_park_blocker_offset);
1893 }
1894
1895 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) {
1896 ThreadsListHandle tlh(JavaThread::current());
1897 JavaThread* thread;
1898 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread);
1899 if (is_virtual) {
1900 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread);
1901 if (carrier_thread == nullptr) {
1902 return nullptr;
1903 }
1904 thread = java_lang_Thread::thread(carrier_thread);
1905 } else {
1906 thread = java_lang_Thread::thread(java_thread);
1907 }
1908 if (thread == nullptr) {
1909 return nullptr;
1910 }
1911
1912 class GetStackTraceClosure : public HandshakeClosure {
1913 public:
1914 const Handle _java_thread;
1915 int _depth;
1916 bool _retry_handshake;
1917 GrowableArray<Method*>* _methods;
1918 GrowableArray<int>* _bcis;
1919
1920 GetStackTraceClosure(Handle java_thread) :
1921 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false),
1922 _methods(nullptr), _bcis(nullptr) {
1923 }
1924 ~GetStackTraceClosure() {
1925 delete _methods;
1926 delete _bcis;
1927 }
1928
1929 bool read_reset_retry() {
1930 bool ret = _retry_handshake;
1931 // If we re-execute the handshake this method need to return false
1932 // when the handshake cannot be performed. (E.g. thread terminating)
1933 _retry_handshake = false;
1934 return ret;
1935 }
1936
1937 void do_thread(Thread* th) {
1938 if (!Thread::current()->is_Java_thread()) {
1939 _retry_handshake = true;
1940 return;
1941 }
1942
1943 JavaThread* thread = JavaThread::cast(th);
1944
1945 if (!thread->has_last_Java_frame()) {
1946 return;
1947 }
1948
1949 bool carrier = false;
1950 if (java_lang_VirtualThread::is_instance(_java_thread())) {
1951 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
1952 const ContinuationEntry* ce = thread->vthread_continuation();
1953 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) {
1954 return; // not mounted
1955 }
1956 } else {
1957 carrier = (thread->vthread_continuation() != nullptr);
1958 }
1959
1960 const int max_depth = MaxJavaStackTraceDepth;
1961 const bool skip_hidden = !ShowHiddenFrames;
1962
1963 // Pick minimum length that will cover most cases
1964 int init_length = 64;
1965 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1966 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
1967
1968 int total_count = 0;
1969 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops
1970 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
1971 vfst.next()) {
1972
1973 if (skip_hidden && (vfst.method()->is_hidden() ||
1974 vfst.method()->is_continuation_enter_intrinsic())) {
1975 continue;
1976 }
1977
1978 _methods->push(vfst.method());
1979 _bcis->push(vfst.bci());
1980 total_count++;
1981 }
1982
1983 _depth = total_count;
1984 }
1985 };
1986
1987 // Handshake with target
1988 ResourceMark rm(THREAD);
1989 HandleMark hm(THREAD);
1990 GetStackTraceClosure gstc(Handle(THREAD, java_thread));
1991 do {
1992 Handshake::execute(&gstc, &tlh, thread);
1993 } while (gstc.read_reset_retry());
1994
1995 // Stop if no stack trace is found.
1996 if (gstc._depth == 0) {
1997 return nullptr;
1998 }
1999
2000 // Convert to StackTraceElement array
2001 InstanceKlass* k = vmClasses::StackTraceElement_klass();
2002 assert(k != nullptr, "must be loaded in 1.4+");
2003 if (k->should_be_initialized()) {
2004 k->initialize(CHECK_NULL);
2005 }
2006 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL);
2007
2008 for (int i = 0; i < gstc._depth; i++) {
2009 methodHandle method(THREAD, gstc._methods->at(i));
2010 oop element = java_lang_StackTraceElement::create(method,
2011 gstc._bcis->at(i),
2012 CHECK_NULL);
2013 trace->obj_at_put(i, element);
2014 }
2015
2016 return trace();
2017 }
2018
2019 const char* java_lang_Thread::thread_status_name(oop java_thread) {
2020 JavaThreadStatus status = get_thread_status(java_thread);
2021 switch (status) {
2022 case JavaThreadStatus::NEW : return "NEW";
2023 case JavaThreadStatus::RUNNABLE : return "RUNNABLE";
2024 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)";
2025 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)";
2026 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
2027 case JavaThreadStatus::PARKED : return "WAITING (parking)";
2028 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)";
2029 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
2030 case JavaThreadStatus::TERMINATED : return "TERMINATED";
2031 default : return "UNKNOWN";
2032 };
2033 }
2034 int java_lang_ThreadGroup::_parent_offset;
2035 int java_lang_ThreadGroup::_name_offset;
2036 int java_lang_ThreadGroup::_maxPriority_offset;
2037 int java_lang_ThreadGroup::_daemon_offset;
2038
2039 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
2040 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2041 return java_thread_group->obj_field(_parent_offset);
2042 }
2043
2044 // ("name as oop" accessor is not necessary)
2045
2046 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
2047 oop name = java_thread_group->obj_field(_name_offset);
2048 // ThreadGroup.name can be null
2049 if (name != nullptr) {
2050 return java_lang_String::as_utf8_string(name);
2051 }
2052 return nullptr;
2053 }
2054
2055 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
2056 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2057 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
2058 }
2059
2060 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
2061 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2062 return java_thread_group->bool_field(_daemon_offset) != 0;
2063 }
2064
2065 #define THREADGROUP_FIELDS_DO(macro) \
2066 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
2067 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
2068 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
2069 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false);
2070
2071 void java_lang_ThreadGroup::compute_offsets() {
2072 assert(_parent_offset == 0, "offsets should be initialized only once");
2073
2074 InstanceKlass* k = vmClasses::ThreadGroup_klass();
2075 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2076 }
2077
2078 #if INCLUDE_CDS
2079 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
2080 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2081 }
2082 #endif
2083
2084
2085 // java_lang_VirtualThread
2086
2087 int java_lang_VirtualThread::static_vthread_scope_offset;
2088 int java_lang_VirtualThread::_carrierThread_offset;
2089 int java_lang_VirtualThread::_continuation_offset;
2090 int java_lang_VirtualThread::_state_offset;
2091 int java_lang_VirtualThread::_next_offset;
2092 int java_lang_VirtualThread::_onWaitingList_offset;
2093 int java_lang_VirtualThread::_notified_offset;
2094 int java_lang_VirtualThread::_timeout_offset;
2095 int java_lang_VirtualThread::_objectWaiter_offset;
2096
2097 #define VTHREAD_FIELDS_DO(macro) \
2098 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \
2099 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \
2100 macro(_continuation_offset, k, "cont", continuation_signature, false); \
2101 macro(_state_offset, k, "state", int_signature, false); \
2102 macro(_next_offset, k, "next", vthread_signature, false); \
2103 macro(_onWaitingList_offset, k, "onWaitingList", bool_signature, false); \
2104 macro(_notified_offset, k, "notified", bool_signature, false); \
2105 macro(_timeout_offset, k, "timeout", long_signature, false);
2106
2107
2108 void java_lang_VirtualThread::compute_offsets() {
2109 InstanceKlass* k = vmClasses::VirtualThread_klass();
2110 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2111 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2112 }
2113
2114 bool java_lang_VirtualThread::is_instance(oop obj) {
2115 return obj != nullptr && is_subclass(obj->klass());
2116 }
2117
2118 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
2119 oop thread = vthread->obj_field(_carrierThread_offset);
2120 return thread;
2121 }
2122
2123 oop java_lang_VirtualThread::continuation(oop vthread) {
2124 oop cont = vthread->obj_field(_continuation_offset);
2125 return cont;
2126 }
2127
2128 int java_lang_VirtualThread::state(oop vthread) {
2129 return vthread->int_field_acquire(_state_offset);
2130 }
2131
2132 void java_lang_VirtualThread::set_state(oop vthread, int state) {
2133 vthread->release_int_field_put(_state_offset, state);
2134 }
2135
2136 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) {
2137 jint* addr = vthread->field_addr<jint>(_state_offset);
2138 int res = Atomic::cmpxchg(addr, old_state, new_state);
2139 return res;
2140 }
2141
2142 oop java_lang_VirtualThread::next(oop vthread) {
2143 return vthread->obj_field(_next_offset);
2144 }
2145
2146 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) {
2147 vthread->obj_field_put(_next_offset, next_vthread);
2148 }
2149
2150 // Add vthread to the waiting list if it's not already in it. Multiple threads
2151 // could be trying to add vthread to the list at the same time, so we control
2152 // access with a cmpxchg on onWaitingList. The winner adds vthread to the list.
2153 // Method returns true if we added vthread to the list, false otherwise.
2154 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) {
2155 jboolean* addr = vthread->field_addr<jboolean>(_onWaitingList_offset);
2156 jboolean vthread_on_list = Atomic::load(addr);
2157 if (!vthread_on_list) {
2158 vthread_on_list = Atomic::cmpxchg(addr, (jboolean)JNI_FALSE, (jboolean)JNI_TRUE);
2159 if (!vthread_on_list) {
2160 for (;;) {
2161 oop head = list_head.resolve();
2162 java_lang_VirtualThread::set_next(vthread, head);
2163 if (list_head.cmpxchg(head, vthread) == head) return true;
2164 }
2165 }
2166 }
2167 return false; // already on waiting list
2168 }
2169
2170 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) {
2171 vthread->bool_field_put_volatile(_notified_offset, value);
2172 }
2173
2174 jlong java_lang_VirtualThread::timeout(oop vthread) {
2175 return vthread->long_field(_timeout_offset);
2176 }
2177
2178 void java_lang_VirtualThread::set_timeout(oop vthread, jlong value) {
2179 vthread->long_field_put(_timeout_offset, value);
2180 }
2181
2182 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2183 JavaThreadStatus status = JavaThreadStatus::NEW;
2184 switch (state & ~SUSPENDED) {
2185 case NEW:
2186 status = JavaThreadStatus::NEW;
2187 break;
2188 case STARTED:
2189 case RUNNING:
2190 case PARKING:
2191 case TIMED_PARKING:
2192 case UNPARKED:
2193 case YIELDING:
2194 case YIELDED:
2195 case UNBLOCKED:
2196 case WAITING:
2197 case TIMED_WAITING:
2198 status = JavaThreadStatus::RUNNABLE;
2199 break;
2200 case PARKED:
2201 case PINNED:
2202 status = JavaThreadStatus::PARKED;
2203 break;
2204 case TIMED_PARKED:
2205 case TIMED_PINNED:
2206 status = JavaThreadStatus::PARKED_TIMED;
2207 break;
2208 case BLOCKING:
2209 case BLOCKED:
2210 status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER;
2211 break;
2212 case WAIT:
2213 status = JavaThreadStatus::IN_OBJECT_WAIT;
2214 break;
2215 case TIMED_WAIT:
2216 status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED;
2217 break;
2218 case TERMINATED:
2219 status = JavaThreadStatus::TERMINATED;
2220 break;
2221 default:
2222 ShouldNotReachHere();
2223 }
2224 return status;
2225 }
2226
2227 ObjectMonitor* java_lang_VirtualThread::current_pending_monitor(oop vthread) {
2228 ObjectWaiter* waiter = objectWaiter(vthread);
2229 if (waiter != nullptr && waiter->at_monitorenter()) {
2230 return waiter->monitor();
2231 }
2232 return nullptr;
2233 }
2234
2235 ObjectMonitor* java_lang_VirtualThread::current_waiting_monitor(oop vthread) {
2236 ObjectWaiter* waiter = objectWaiter(vthread);
2237 if (waiter != nullptr && waiter->is_wait()) {
2238 return waiter->monitor();
2239 }
2240 return nullptr;
2241 }
2242
2243 bool java_lang_VirtualThread::is_preempted(oop vthread) {
2244 oop continuation = java_lang_VirtualThread::continuation(vthread);
2245 assert(continuation != nullptr, "vthread with no continuation");
2246 stackChunkOop chunk = jdk_internal_vm_Continuation::tail(continuation);
2247 return chunk != nullptr && chunk->preempted();
2248 }
2249
2250 #if INCLUDE_CDS
2251 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2252 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2253 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2254 }
2255 #endif
2256
2257 // java_lang_Throwable
2258
2259 int java_lang_Throwable::_backtrace_offset;
2260 int java_lang_Throwable::_detailMessage_offset;
2261 int java_lang_Throwable::_stackTrace_offset;
2262 int java_lang_Throwable::_depth_offset;
2263 int java_lang_Throwable::_cause_offset;
2264 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2265
2266 #define THROWABLE_FIELDS_DO(macro) \
2267 macro(_backtrace_offset, k, "backtrace", object_signature, false); \
2268 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \
2269 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2270 macro(_depth_offset, k, "depth", int_signature, false); \
2271 macro(_cause_offset, k, "cause", throwable_signature, false); \
2272 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2273
2274 void java_lang_Throwable::compute_offsets() {
2275 InstanceKlass* k = vmClasses::Throwable_klass();
2276 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2277 }
2278
2279 #if INCLUDE_CDS
2280 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2281 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2282 }
2283 #endif
2284
2285 oop java_lang_Throwable::unassigned_stacktrace() {
2286 InstanceKlass* ik = vmClasses::Throwable_klass();
2287 oop base = ik->static_field_base_raw();
2288 return base->obj_field(_static_unassigned_stacktrace_offset);
2289 }
2290
2291 oop java_lang_Throwable::backtrace(oop throwable) {
2292 return throwable->obj_field_acquire(_backtrace_offset);
2293 }
2294
2295
2296 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2297 throwable->release_obj_field_put(_backtrace_offset, value);
2298 }
2299
2300 int java_lang_Throwable::depth(oop throwable) {
2301 return throwable->int_field(_depth_offset);
2302 }
2303
2304 void java_lang_Throwable::set_depth(oop throwable, int value) {
2305 throwable->int_field_put(_depth_offset, value);
2306 }
2307
2308 oop java_lang_Throwable::message(oop throwable) {
2309 return throwable->obj_field(_detailMessage_offset);
2310 }
2311
2312 const char* java_lang_Throwable::message_as_utf8(oop throwable) {
2313 oop msg = java_lang_Throwable::message(throwable);
2314 const char* msg_utf8 = nullptr;
2315 if (msg != nullptr) {
2316 msg_utf8 = java_lang_String::as_utf8_string(msg);
2317 }
2318 return msg_utf8;
2319 }
2320
2321 oop java_lang_Throwable::cause(oop throwable) {
2322 return throwable->obj_field(_cause_offset);
2323 }
2324
2325 void java_lang_Throwable::set_message(oop throwable, oop value) {
2326 throwable->obj_field_put(_detailMessage_offset, value);
2327 }
2328
2329
2330 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2331 throwable->obj_field_put(_stackTrace_offset, st_element_array);
2332 }
2333
2334 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2335 set_stacktrace(throwable, nullptr);
2336 }
2337
2338
2339 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2340 ResourceMark rm;
2341 Klass* k = throwable->klass();
2342 assert(k != nullptr, "just checking");
2343 st->print("%s", k->external_name());
2344 oop msg = message(throwable);
2345 if (msg != nullptr) {
2346 st->print(": %s", java_lang_String::as_utf8_string(msg));
2347 }
2348 }
2349
2350 // After this many redefines, the stack trace is unreliable.
2351 const int MAX_VERSION = USHRT_MAX;
2352
2353 static inline bool version_matches(Method* method, int version) {
2354 assert(version < MAX_VERSION, "version is too big");
2355 return method != nullptr && (method->constants()->version() == version);
2356 }
2357
2358 // This class provides a simple wrapper over the internal structure of
2359 // exception backtrace to insulate users of the backtrace from needing
2360 // to know what it looks like.
2361 // The code of this class is not GC safe. Allocations can only happen
2362 // in expand().
2363 class BacktraceBuilder: public StackObj {
2364 friend class BacktraceIterator;
2365 private:
2366 Handle _backtrace;
2367 objArrayOop _head;
2368 typeArrayOop _methods;
2369 typeArrayOop _bcis;
2370 objArrayOop _mirrors;
2371 typeArrayOop _names; // Needed to insulate method name against redefinition.
2372 // True if the top frame of the backtrace is omitted because it shall be hidden.
2373 bool _has_hidden_top_frame;
2374 int _index;
2375 NoSafepointVerifier _nsv;
2376
2377 enum {
2378 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2379 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2380 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2381 trace_names_offset = java_lang_Throwable::trace_names_offset,
2382 trace_conts_offset = java_lang_Throwable::trace_conts_offset,
2383 trace_next_offset = java_lang_Throwable::trace_next_offset,
2384 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2385 trace_size = java_lang_Throwable::trace_size,
2386 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2387 };
2388
2389 // get info out of chunks
2390 static typeArrayOop get_methods(objArrayHandle chunk) {
2391 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2392 assert(methods != nullptr, "method array should be initialized in backtrace");
2393 return methods;
2394 }
2395 static typeArrayOop get_bcis(objArrayHandle chunk) {
2396 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2397 assert(bcis != nullptr, "bci array should be initialized in backtrace");
2398 return bcis;
2399 }
2400 static objArrayOop get_mirrors(objArrayHandle chunk) {
2401 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2402 assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2403 return mirrors;
2404 }
2405 static typeArrayOop get_names(objArrayHandle chunk) {
2406 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2407 assert(names != nullptr, "names array should be initialized in backtrace");
2408 return names;
2409 }
2410 static bool has_hidden_top_frame(objArrayHandle chunk) {
2411 oop hidden = chunk->obj_at(trace_hidden_offset);
2412 return hidden != nullptr;
2413 }
2414
2415 public:
2416
2417 // constructor for new backtrace
2418 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2419 expand(CHECK);
2420 _backtrace = Handle(THREAD, _head);
2421 _index = 0;
2422 }
2423
2424 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2425 _methods = get_methods(backtrace);
2426 _bcis = get_bcis(backtrace);
2427 _mirrors = get_mirrors(backtrace);
2428 _names = get_names(backtrace);
2429 _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2430 assert(_methods->length() == _bcis->length() &&
2431 _methods->length() == _mirrors->length() &&
2432 _mirrors->length() == _names->length(),
2433 "method and source information arrays should match");
2434
2435 // head is the preallocated backtrace
2436 _head = backtrace();
2437 _backtrace = Handle(thread, _head);
2438 _index = 0;
2439 }
2440
2441 void expand(TRAPS) {
2442 objArrayHandle old_head(THREAD, _head);
2443 PauseNoSafepointVerifier pnsv(&_nsv);
2444
2445 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2446 objArrayHandle new_head(THREAD, head);
2447
2448 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2449 typeArrayHandle new_methods(THREAD, methods);
2450
2451 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2452 typeArrayHandle new_bcis(THREAD, bcis);
2453
2454 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2455 objArrayHandle new_mirrors(THREAD, mirrors);
2456
2457 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2458 typeArrayHandle new_names(THREAD, names);
2459
2460 if (!old_head.is_null()) {
2461 old_head->obj_at_put(trace_next_offset, new_head());
2462 }
2463 new_head->obj_at_put(trace_methods_offset, new_methods());
2464 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2465 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2466 new_head->obj_at_put(trace_names_offset, new_names());
2467 new_head->obj_at_put(trace_hidden_offset, nullptr);
2468
2469 _head = new_head();
2470 _methods = new_methods();
2471 _bcis = new_bcis();
2472 _mirrors = new_mirrors();
2473 _names = new_names();
2474 _index = 0;
2475 }
2476
2477 oop backtrace() {
2478 return _backtrace();
2479 }
2480
2481 inline void push(Method* method, int bci, TRAPS) {
2482 // Smear the -1 bci to 0 since the array only holds unsigned
2483 // shorts. The later line number lookup would just smear the -1
2484 // to a 0 even if it could be recorded.
2485 if (bci == SynchronizationEntryBCI) bci = 0;
2486
2487 if (_index >= trace_chunk_size) {
2488 methodHandle mhandle(THREAD, method);
2489 expand(CHECK);
2490 method = mhandle();
2491 }
2492
2493 _methods->ushort_at_put(_index, method->orig_method_idnum());
2494 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2495
2496 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2497 // klass owning the symbols alive so their refcounts aren't decremented.
2498 Symbol* name = method->name();
2499 _names->symbol_at_put(_index, name);
2500
2501 // We need to save the mirrors in the backtrace to keep the class
2502 // from being unloaded while we still have this stack trace.
2503 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2504 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2505
2506 _index++;
2507 }
2508
2509 void set_has_hidden_top_frame() {
2510 if (!_has_hidden_top_frame) {
2511 // It would be nice to add java/lang/Boolean::TRUE here
2512 // to indicate that this backtrace has a hidden top frame.
2513 // But this code is used before TRUE is allocated.
2514 // Therefore let's just use an arbitrary legal oop
2515 // available right here. _methods is a short[].
2516 assert(_methods != nullptr, "we need a legal oop");
2517 _has_hidden_top_frame = true;
2518 _head->obj_at_put(trace_hidden_offset, _methods);
2519 }
2520 }
2521 };
2522
2523 struct BacktraceElement : public StackObj {
2524 int _method_id;
2525 int _bci;
2526 int _version;
2527 Symbol* _name;
2528 Handle _mirror;
2529 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2530 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2531 };
2532
2533 class BacktraceIterator : public StackObj {
2534 int _index;
2535 objArrayHandle _result;
2536 objArrayHandle _mirrors;
2537 typeArrayHandle _methods;
2538 typeArrayHandle _bcis;
2539 typeArrayHandle _names;
2540
2541 void init(objArrayHandle result, Thread* thread) {
2542 // Get method id, bci, version and mirror from chunk
2543 _result = result;
2544 if (_result.not_null()) {
2545 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2546 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2547 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2548 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2549 _index = 0;
2550 }
2551 }
2552 public:
2553 BacktraceIterator(objArrayHandle result, Thread* thread) {
2554 init(result, thread);
2555 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2556 }
2557
2558 BacktraceElement next(Thread* thread) {
2559 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2560 _methods->ushort_at(_index),
2561 Backtrace::version_at(_bcis->int_at(_index)),
2562 Backtrace::bci_at(_bcis->int_at(_index)),
2563 _names->symbol_at(_index));
2564 _index++;
2565
2566 if (_index >= java_lang_Throwable::trace_chunk_size) {
2567 int next_offset = java_lang_Throwable::trace_next_offset;
2568 // Get next chunk
2569 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2570 init(result, thread);
2571 }
2572 return e;
2573 }
2574
2575 bool repeat() {
2576 return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2577 }
2578 };
2579
2580
2581 // Print stack trace element to resource allocated buffer
2582 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2583 int version, int bci, Symbol* name) {
2584 ResourceMark rm;
2585
2586 // Get strings and string lengths
2587 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2588 const char* klass_name = holder->external_name();
2589 int buf_len = (int)strlen(klass_name);
2590
2591 char* method_name = name->as_C_string();
2592 buf_len += (int)strlen(method_name);
2593
2594 char* source_file_name = nullptr;
2595 Symbol* source = Backtrace::get_source_file_name(holder, version);
2596 if (source != nullptr) {
2597 source_file_name = source->as_C_string();
2598 buf_len += (int)strlen(source_file_name);
2599 }
2600
2601 char *module_name = nullptr, *module_version = nullptr;
2602 ModuleEntry* module = holder->module();
2603 if (module->is_named()) {
2604 module_name = module->name()->as_C_string();
2605 buf_len += (int)strlen(module_name);
2606 if (module->version() != nullptr) {
2607 module_version = module->version()->as_C_string();
2608 buf_len += (int)strlen(module_version);
2609 }
2610 }
2611
2612 // Allocate temporary buffer with extra space for formatting and line number
2613 const size_t buf_size = buf_len + 64;
2614 char* buf = NEW_RESOURCE_ARRAY(char, buf_size);
2615
2616 // Print stack trace line in buffer
2617 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name);
2618
2619 // Print module information
2620 if (module_name != nullptr) {
2621 if (module_version != nullptr) {
2622 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version);
2623 } else {
2624 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name);
2625 }
2626 }
2627
2628 // The method can be null if the requested class version is gone
2629 Method* method = holder->method_with_orig_idnum(method_id, version);
2630 if (!version_matches(method, version)) {
2631 strcat(buf, "Redefined)");
2632 } else {
2633 int line_number = Backtrace::get_line_number(method, bci);
2634 if (line_number == -2) {
2635 strcat(buf, "Native Method)");
2636 } else {
2637 if (source_file_name != nullptr && (line_number != -1)) {
2638 // Sourcename and linenumber
2639 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number);
2640 } else if (source_file_name != nullptr) {
2641 // Just sourcename
2642 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name);
2643 } else {
2644 // Neither sourcename nor linenumber
2645 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)");
2646 }
2647 nmethod* nm = method->code();
2648 if (WizardMode && nm != nullptr) {
2649 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2650 }
2651 }
2652 }
2653
2654 st->print_cr("%s", buf);
2655 }
2656
2657 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2658 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2659 int method_id = method->orig_method_idnum();
2660 int version = method->constants()->version();
2661 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2662 }
2663
2664 /**
2665 * Print the throwable message and its stack trace plus all causes by walking the
2666 * cause chain. The output looks the same as of Throwable.printStackTrace().
2667 */
2668 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2669 // First, print the message.
2670 print(throwable(), st);
2671 st->cr();
2672
2673 // Now print the stack trace.
2674 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2675 while (throwable.not_null()) {
2676 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2677 if (result.is_null()) {
2678 st->print_raw_cr("\t<<no stack trace available>>");
2679 return;
2680 }
2681 BacktraceIterator iter(result, THREAD);
2682
2683 while (iter.repeat()) {
2684 BacktraceElement bte = iter.next(THREAD);
2685 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2686 }
2687 if (THREAD->can_call_java()) {
2688 // Call getCause() which doesn't necessarily return the _cause field.
2689 ExceptionMark em(THREAD);
2690 JavaValue cause(T_OBJECT);
2691 JavaCalls::call_virtual(&cause,
2692 throwable,
2693 throwable->klass(),
2694 vmSymbols::getCause_name(),
2695 vmSymbols::void_throwable_signature(),
2696 THREAD);
2697 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2698 if (HAS_PENDING_EXCEPTION) {
2699 CLEAR_PENDING_EXCEPTION;
2700 throwable = Handle();
2701 } else {
2702 throwable = Handle(THREAD, cause.get_oop());
2703 if (throwable.not_null()) {
2704 st->print("Caused by: ");
2705 print(throwable(), st);
2706 st->cr();
2707 }
2708 }
2709 } else {
2710 st->print_raw_cr("<<cannot call Java to get cause>>");
2711 return;
2712 }
2713 }
2714 }
2715
2716 /**
2717 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2718 */
2719 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2720 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2721 JavaValue result(T_VOID);
2722 JavaCalls::call_virtual(&result,
2723 throwable,
2724 vmClasses::Throwable_klass(),
2725 vmSymbols::printStackTrace_name(),
2726 vmSymbols::void_method_signature(),
2727 THREAD);
2728 }
2729
2730 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2731 if (!StackTraceInThrowable) return;
2732 ResourceMark rm(THREAD);
2733
2734 // Start out by clearing the backtrace for this object, in case the VM
2735 // runs out of memory while allocating the stack trace
2736 set_backtrace(throwable(), nullptr);
2737 // Clear lazily constructed Java level stacktrace if refilling occurs
2738 // This is unnecessary in 1.7+ but harmless
2739 clear_stacktrace(throwable());
2740
2741 int max_depth = MaxJavaStackTraceDepth;
2742 JavaThread* thread = THREAD;
2743
2744 BacktraceBuilder bt(CHECK);
2745
2746 // If there is no Java frame just return the method that was being called
2747 // with bci 0
2748 if (!thread->has_last_Java_frame()) {
2749 if (max_depth >= 1 && method() != nullptr) {
2750 bt.push(method(), 0, CHECK);
2751 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2752 set_depth(throwable(), 1);
2753 set_backtrace(throwable(), bt.backtrace());
2754 }
2755 return;
2756 }
2757
2758 // Instead of using vframe directly, this version of fill_in_stack_trace
2759 // basically handles everything by hand. This significantly improved the
2760 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2761 // See bug 6333838 for more details.
2762 // The "ASSERT" here is to verify this method generates the exactly same stack
2763 // trace as utilizing vframe.
2764 #ifdef ASSERT
2765 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2766 #endif
2767 int total_count = 0;
2768 RegisterMap map(thread,
2769 RegisterMap::UpdateMap::skip,
2770 RegisterMap::ProcessFrames::skip,
2771 RegisterMap::WalkContinuation::include);
2772 int decode_offset = 0;
2773 nmethod* nm = nullptr;
2774 bool skip_fillInStackTrace_check = false;
2775 bool skip_throwableInit_check = false;
2776 bool skip_hidden = !ShowHiddenFrames;
2777 bool show_carrier = ShowCarrierFrames;
2778 ContinuationEntry* cont_entry = thread->last_continuation();
2779 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2780 Method* method = nullptr;
2781 int bci = 0;
2782
2783 // Compiled java method case.
2784 if (decode_offset != 0) {
2785 DebugInfoReadStream stream(nm, decode_offset);
2786 decode_offset = stream.read_int();
2787 method = (Method*)nm->metadata_at(stream.read_int());
2788 bci = stream.read_bci();
2789 } else {
2790 if (fr.is_first_frame()) break;
2791
2792 if (Continuation::is_continuation_enterSpecial(fr)) {
2793 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2794 if (!show_carrier && cont_entry->is_virtual_thread()) {
2795 break;
2796 }
2797 cont_entry = cont_entry->parent();
2798 }
2799
2800 address pc = fr.pc();
2801 if (fr.is_interpreted_frame()) {
2802 address bcp;
2803 if (!map.in_cont()) {
2804 bcp = fr.interpreter_frame_bcp();
2805 method = fr.interpreter_frame_method();
2806 } else {
2807 bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2808 method = map.stack_chunk()->interpreter_frame_method(fr);
2809 }
2810 bci = method->bci_from(bcp);
2811 fr = fr.sender(&map);
2812 } else {
2813 CodeBlob* cb = fr.cb();
2814 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2815 // but non nmethod
2816 fr = fr.sender(&map);
2817 if (cb == nullptr || !cb->is_nmethod()) {
2818 continue;
2819 }
2820 nm = cb->as_nmethod();
2821 assert(nm->method() != nullptr, "must be");
2822 if (nm->method()->is_native()) {
2823 method = nm->method();
2824 bci = 0;
2825 } else {
2826 PcDesc* pd = nm->pc_desc_at(pc);
2827 decode_offset = pd->scope_decode_offset();
2828 // if decode_offset is not equal to 0, it will execute the
2829 // "compiled java method case" at the beginning of the loop.
2830 continue;
2831 }
2832 }
2833 }
2834 #ifdef ASSERT
2835 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2836 assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2837 st.next();
2838 }
2839 #endif
2840
2841 // the format of the stacktrace will be:
2842 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2843 // - 0 or more <init> methods for the exception class (skipped)
2844 // - rest of the stack
2845
2846 if (!skip_fillInStackTrace_check) {
2847 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2848 throwable->is_a(method->method_holder())) {
2849 continue;
2850 }
2851 else {
2852 skip_fillInStackTrace_check = true; // gone past them all
2853 }
2854 }
2855 if (!skip_throwableInit_check) {
2856 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2857
2858 // skip <init> methods of the exception class and superclasses
2859 // This is similar to classic VM.
2860 if (method->is_object_constructor() &&
2861 throwable->is_a(method->method_holder())) {
2862 continue;
2863 } else {
2864 // there are none or we've seen them all - either way stop checking
2865 skip_throwableInit_check = true;
2866 }
2867 }
2868 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2869 if (skip_hidden) {
2870 if (total_count == 0) {
2871 // The top frame will be hidden from the stack trace.
2872 bt.set_has_hidden_top_frame();
2873 }
2874 continue;
2875 }
2876 }
2877
2878 bt.push(method, bci, CHECK);
2879 total_count++;
2880 }
2881
2882 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2883
2884 // Put completed stack trace into throwable object
2885 set_backtrace(throwable(), bt.backtrace());
2886 set_depth(throwable(), total_count);
2887 }
2888
2889 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2890 // No-op if stack trace is disabled
2891 if (!StackTraceInThrowable) {
2892 return;
2893 }
2894
2895 // Disable stack traces for some preallocated out of memory errors
2896 if (!Universe::should_fill_in_stack_trace(throwable)) {
2897 return;
2898 }
2899
2900 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2901 PreserveExceptionMark pm(THREAD);
2902
2903 fill_in_stack_trace(throwable, method, THREAD);
2904 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2905 // original exception via the PreserveExceptionMark destructor.
2906 CLEAR_PENDING_EXCEPTION;
2907 }
2908
2909 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2910 // Allocate stack trace - backtrace is created but not filled in
2911
2912 // No-op if stack trace is disabled
2913 if (!StackTraceInThrowable) return;
2914 BacktraceBuilder bt(CHECK); // creates a backtrace
2915 set_backtrace(throwable(), bt.backtrace());
2916 }
2917
2918
2919 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2920 // Fill in stack trace into preallocated backtrace (no GC)
2921
2922 // No-op if stack trace is disabled
2923 if (!StackTraceInThrowable) return;
2924
2925 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2926
2927 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2928
2929 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2930 assert(backtrace.not_null(), "backtrace should have been preallocated");
2931
2932 ResourceMark rm(THREAD);
2933 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2934
2935 BacktraceBuilder bt(THREAD, backtrace);
2936
2937 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2938 // methods as preallocated errors aren't created by "java" code.
2939
2940 // fill in as much stack trace as possible
2941 int chunk_count = 0;
2942 for (;!st.at_end(); st.next()) {
2943 bt.push(st.method(), st.bci(), CHECK);
2944 chunk_count++;
2945
2946 // Bail-out for deep stacks
2947 if (chunk_count >= trace_chunk_size) break;
2948 }
2949 set_depth(throwable(), chunk_count);
2950 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2951
2952 // We support the Throwable immutability protocol defined for Java 7.
2953 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2954 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2955 }
2956
2957 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2958 objArrayHandle stack_trace_array_h, TRAPS) {
2959
2960 if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2961 THROW(vmSymbols::java_lang_NullPointerException());
2962 }
2963
2964 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2965
2966 if (stack_trace_array_h->length() != depth) {
2967 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2968 }
2969
2970 objArrayHandle result(THREAD, objArrayOop(backtrace()));
2971 BacktraceIterator iter(result, THREAD);
2972
2973 int index = 0;
2974 while (iter.repeat()) {
2975 BacktraceElement bte = iter.next(THREAD);
2976
2977 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2978
2979 if (stack_trace_element.is_null()) {
2980 THROW(vmSymbols::java_lang_NullPointerException());
2981 }
2982
2983 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2984 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2985
2986 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2987 method,
2988 bte._version,
2989 bte._bci,
2990 bte._name,
2991 CHECK);
2992 }
2993 }
2994
2995 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
2996 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
2997 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
2998 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
2999 // symbolic stacktrace of 'throwable'.
3000 assert(throwable.not_null(), "shouldn't be");
3001
3002 // Now create the message from the original exception and thread name.
3003 ResourceMark rm(current);
3004 const char *message = nullptr;
3005 oop detailed_message = java_lang_Throwable::message(throwable());
3006 if (detailed_message != nullptr) {
3007 message = java_lang_String::as_utf8_string(detailed_message);
3008 }
3009 stringStream st;
3010 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
3011 message == nullptr ? "" : ":");
3012 if (message == nullptr) {
3013 st.print("[in thread \"%s\"]", current->name());
3014 } else {
3015 st.print("%s [in thread \"%s\"]", message, current->name());
3016 }
3017
3018 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
3019 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
3020 // If new_exception returns a different exception while creating the exception,
3021 // abandon the attempt to save the initialization error and return null.
3022 if (init_error->klass()->name() != exception_name) {
3023 log_info(class, init)("Exception %s thrown while saving initialization exception",
3024 init_error->klass()->external_name());
3025 return Handle();
3026 }
3027
3028 // Call to java to fill in the stack trace and clear declaringClassObject to
3029 // not keep classes alive in the stack trace.
3030 // call this: public StackTraceElement[] getStackTrace()
3031 JavaValue result(T_ARRAY);
3032 JavaCalls::call_virtual(&result, throwable,
3033 vmClasses::Throwable_klass(),
3034 vmSymbols::getStackTrace_name(),
3035 vmSymbols::getStackTrace_signature(),
3036 current);
3037 if (!current->has_pending_exception()){
3038 Handle stack_trace(current, result.get_oop());
3039 assert(stack_trace->is_objArray(), "Should be an array");
3040 java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
3041 // Clear backtrace because the stacktrace should be used instead.
3042 set_backtrace(init_error(), nullptr);
3043 } else {
3044 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
3045 init_error->klass()->external_name());
3046 current->clear_pending_exception();
3047 }
3048
3049 return init_error;
3050 }
3051
3052 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
3053 JavaThread* current = JavaThread::current();
3054 objArrayHandle result(current, objArrayOop(backtrace(throwable)));
3055 BacktraceIterator iter(result, current);
3056 // No backtrace available.
3057 if (!iter.repeat()) return false;
3058
3059 // If the exception happened in a frame that has been hidden, i.e.,
3060 // omitted from the back trace, we can not compute the message.
3061 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
3062 if (hidden != nullptr) {
3063 return false;
3064 }
3065
3066 // Get first backtrace element.
3067 BacktraceElement bte = iter.next(current);
3068
3069 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
3070 assert(holder != nullptr, "first element should be non-null");
3071 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
3072
3073 // Original version is no longer available.
3074 if (m == nullptr || !version_matches(m, bte._version)) {
3075 return false;
3076 }
3077
3078 *method = m;
3079 *bci = bte._bci;
3080 return true;
3081 }
3082
3083 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
3084 // Allocate java.lang.StackTraceElement instance
3085 InstanceKlass* k = vmClasses::StackTraceElement_klass();
3086 assert(k != nullptr, "must be loaded in 1.4+");
3087 if (k->should_be_initialized()) {
3088 k->initialize(CHECK_NULL);
3089 }
3090
3091 Handle element = k->allocate_instance_handle(CHECK_NULL);
3092
3093 int version = method->constants()->version();
3094 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
3095 return element();
3096 }
3097
3098 void java_lang_StackTraceElement::fill_in(Handle element,
3099 InstanceKlass* holder, const methodHandle& method,
3100 int version, int bci, Symbol* name, TRAPS) {
3101 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
3102
3103 ResourceMark rm(THREAD);
3104 HandleMark hm(THREAD);
3105
3106 // Fill in class name
3107 Handle java_class(THREAD, holder->java_mirror());
3108 oop classname = java_lang_Class::name(java_class, CHECK);
3109 java_lang_StackTraceElement::set_declaringClass(element(), classname);
3110 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
3111
3112 oop loader = holder->class_loader();
3113 if (loader != nullptr) {
3114 oop loader_name = java_lang_ClassLoader::name(loader);
3115 if (loader_name != nullptr)
3116 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
3117 }
3118
3119 // Fill in method name
3120 oop methodname = StringTable::intern(name, CHECK);
3121 java_lang_StackTraceElement::set_methodName(element(), methodname);
3122
3123 // Fill in module name and version
3124 ModuleEntry* module = holder->module();
3125 if (module->is_named()) {
3126 oop module_name = StringTable::intern(module->name(), CHECK);
3127 java_lang_StackTraceElement::set_moduleName(element(), module_name);
3128 oop module_version;
3129 if (module->version() != nullptr) {
3130 module_version = StringTable::intern(module->version(), CHECK);
3131 } else {
3132 module_version = nullptr;
3133 }
3134 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
3135 }
3136
3137 if (method() == nullptr || !version_matches(method(), version)) {
3138 // The method was redefined, accurate line number information isn't available
3139 java_lang_StackTraceElement::set_fileName(element(), nullptr);
3140 java_lang_StackTraceElement::set_lineNumber(element(), -1);
3141 } else {
3142 Symbol* source;
3143 oop source_file;
3144 int line_number;
3145 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
3146
3147 java_lang_StackTraceElement::set_fileName(element(), source_file);
3148 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
3149 }
3150 }
3151
3152 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
3153 InstanceKlass* holder,
3154 int version,
3155 const methodHandle& method,
3156 int bci,
3157 Symbol*& source,
3158 oop& source_file,
3159 int& line_number, TRAPS) {
3160 // Fill in source file name and line number.
3161 source = Backtrace::get_source_file_name(holder, version);
3162 source_file = java_lang_Class::source_file(java_class());
3163 if (source != nullptr) {
3164 // Class was not redefined. We can trust its cache if set,
3165 // else we have to initialize it.
3166 if (source_file == nullptr) {
3167 source_file = StringTable::intern(source, CHECK);
3168 java_lang_Class::set_source_file(java_class(), source_file);
3169 }
3170 } else {
3171 // Class was redefined. Dump the cache if it was set.
3172 if (source_file != nullptr) {
3173 source_file = nullptr;
3174 java_lang_Class::set_source_file(java_class(), source_file);
3175 }
3176 }
3177 line_number = Backtrace::get_line_number(method(), bci);
3178 }
3179
3180 #if INCLUDE_JVMCI
3181 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
3182 Symbol*& filename, int& line_number, TRAPS) {
3183 ResourceMark rm(THREAD);
3184 HandleMark hm(THREAD);
3185
3186 filename = nullptr;
3187 line_number = -1;
3188
3189 oop source_file;
3190 int version = method->constants()->version();
3191 InstanceKlass* holder = method->method_holder();
3192 Handle java_class(THREAD, holder->java_mirror());
3193 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
3194 }
3195 #endif // INCLUDE_JVMCI
3196
3197 // java_lang_ClassFrameInfo
3198
3199 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
3200 int java_lang_ClassFrameInfo::_flags_offset;
3201
3202 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
3203 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \
3204 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false)
3205
3206 void java_lang_ClassFrameInfo::compute_offsets() {
3207 InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
3208 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3209 }
3210
3211 #if INCLUDE_CDS
3212 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
3213 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3214 }
3215 #endif
3216
3217 static int get_flags(const methodHandle& m) {
3218 int flags = m->access_flags().as_method_flags();
3219 if (m->is_object_constructor()) {
3220 flags |= java_lang_invoke_MemberName::MN_IS_OBJECT_CONSTRUCTOR;
3221 } else {
3222 // Note: Static initializers can be here. Record them as plain methods.
3223 flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
3224 }
3225 if (m->caller_sensitive()) {
3226 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
3227 }
3228 if (m->is_hidden()) {
3229 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3230 }
3231 assert((flags & 0xFF000000) == 0, "unexpected flags");
3232 return flags;
3233 }
3234
3235 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3236 return obj->obj_field(_classOrMemberName_offset);
3237 }
3238
3239 int java_lang_ClassFrameInfo::flags(oop obj) {
3240 return obj->int_field(_flags_offset);
3241 }
3242
3243 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3244 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3245 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3246 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3247 stackFrame->int_field_put(_flags_offset, flags);
3248 }
3249
3250 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3251 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3252 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3253 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3254 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3255 stackFrame->int_field_put(_flags_offset, flags);
3256 }
3257
3258
3259 // java_lang_StackFrameInfo
3260
3261 int java_lang_StackFrameInfo::_type_offset;
3262 int java_lang_StackFrameInfo::_name_offset;
3263 int java_lang_StackFrameInfo::_bci_offset;
3264 int java_lang_StackFrameInfo::_version_offset;
3265 int java_lang_StackFrameInfo::_contScope_offset;
3266
3267 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3268 macro(_type_offset, k, "type", object_signature, false); \
3269 macro(_name_offset, k, "name", string_signature, false); \
3270 macro(_bci_offset, k, "bci", int_signature, false); \
3271 macro(_contScope_offset, k, "contScope", continuationscope_signature, false)
3272
3273 void java_lang_StackFrameInfo::compute_offsets() {
3274 InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3275 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3276 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3277 }
3278
3279 #if INCLUDE_CDS
3280 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3281 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3282 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3283 }
3284 #endif
3285
3286 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3287 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3288 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3289 return method;
3290 }
3291
3292 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3293 // set Method* or mid/cpref
3294 HandleMark hm(THREAD);
3295 Handle cont_h(THREAD, cont);
3296 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3297
3298 // set bci
3299 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3300 // method may be redefined; store the version
3301 int version = method->constants()->version();
3302 assert((jushort)version == version, "version should be short");
3303 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3304
3305 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3306 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3307 }
3308
3309 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3310 ResourceMark rm(THREAD);
3311 HandleMark hm(THREAD);
3312
3313 Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3314 InstanceKlass* holder = method->method_holder();
3315 short version = stackFrame->short_field(_version_offset);
3316 int bci = stackFrame->int_field(_bci_offset);
3317 Symbol* name = method->name();
3318 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3319 }
3320
3321 oop java_lang_StackFrameInfo::type(oop obj) {
3322 return obj->obj_field(_type_offset);
3323 }
3324
3325 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3326 obj->obj_field_put(_type_offset, value);
3327 }
3328
3329 oop java_lang_StackFrameInfo::name(oop obj) {
3330 return obj->obj_field(_name_offset);
3331 }
3332
3333 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3334 obj->obj_field_put(_name_offset, value);
3335 }
3336
3337 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3338 obj->short_field_put(_version_offset, value);
3339 }
3340
3341 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3342 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3343 obj->int_field_put(_bci_offset, value);
3344 }
3345
3346 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3347 obj->obj_field_put(_contScope_offset, value);
3348 }
3349
3350 int java_lang_LiveStackFrameInfo::_monitors_offset;
3351 int java_lang_LiveStackFrameInfo::_locals_offset;
3352 int java_lang_LiveStackFrameInfo::_operands_offset;
3353 int java_lang_LiveStackFrameInfo::_mode_offset;
3354
3355 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3356 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
3357 macro(_locals_offset, k, "locals", object_array_signature, false); \
3358 macro(_operands_offset, k, "operands", object_array_signature, false); \
3359 macro(_mode_offset, k, "mode", int_signature, false)
3360
3361 void java_lang_LiveStackFrameInfo::compute_offsets() {
3362 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3363 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3364 }
3365
3366 #if INCLUDE_CDS
3367 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3368 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3369 }
3370 #endif
3371
3372 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3373 obj->obj_field_put(_monitors_offset, value);
3374 }
3375
3376 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3377 obj->obj_field_put(_locals_offset, value);
3378 }
3379
3380 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3381 obj->obj_field_put(_operands_offset, value);
3382 }
3383
3384 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3385 obj->int_field_put(_mode_offset, value);
3386 }
3387
3388
3389 // java_lang_AccessibleObject
3390
3391 int java_lang_reflect_AccessibleObject::_override_offset;
3392
3393 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3394 macro(_override_offset, k, "override", bool_signature, false)
3395
3396 void java_lang_reflect_AccessibleObject::compute_offsets() {
3397 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3398 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3399 }
3400
3401 #if INCLUDE_CDS
3402 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3403 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3404 }
3405 #endif
3406
3407 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3408 return (jboolean) reflect->bool_field(_override_offset);
3409 }
3410
3411 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3412 reflect->bool_field_put(_override_offset, (int) value);
3413 }
3414
3415 // java_lang_reflect_Method
3416
3417 int java_lang_reflect_Method::_clazz_offset;
3418 int java_lang_reflect_Method::_name_offset;
3419 int java_lang_reflect_Method::_returnType_offset;
3420 int java_lang_reflect_Method::_parameterTypes_offset;
3421 int java_lang_reflect_Method::_exceptionTypes_offset;
3422 int java_lang_reflect_Method::_slot_offset;
3423 int java_lang_reflect_Method::_modifiers_offset;
3424 int java_lang_reflect_Method::_signature_offset;
3425 int java_lang_reflect_Method::_annotations_offset;
3426 int java_lang_reflect_Method::_parameter_annotations_offset;
3427 int java_lang_reflect_Method::_annotation_default_offset;
3428
3429 #define METHOD_FIELDS_DO(macro) \
3430 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3431 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3432 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
3433 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3434 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3435 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3436 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3437 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3438 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3439 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3440 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
3441
3442 void java_lang_reflect_Method::compute_offsets() {
3443 InstanceKlass* k = vmClasses::reflect_Method_klass();
3444 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3445 }
3446
3447 #if INCLUDE_CDS
3448 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3449 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3450 }
3451 #endif
3452
3453 Handle java_lang_reflect_Method::create(TRAPS) {
3454 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3455 Klass* klass = vmClasses::reflect_Method_klass();
3456 // This class is eagerly initialized during VM initialization, since we keep a reference
3457 // to one of the methods
3458 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
3459 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
3460 }
3461
3462 oop java_lang_reflect_Method::clazz(oop reflect) {
3463 return reflect->obj_field(_clazz_offset);
3464 }
3465
3466 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3467 reflect->obj_field_put(_clazz_offset, value);
3468 }
3469
3470 int java_lang_reflect_Method::slot(oop reflect) {
3471 return reflect->int_field(_slot_offset);
3472 }
3473
3474 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3475 reflect->int_field_put(_slot_offset, value);
3476 }
3477
3478 void java_lang_reflect_Method::set_name(oop method, oop value) {
3479 method->obj_field_put(_name_offset, value);
3480 }
3481
3482 oop java_lang_reflect_Method::return_type(oop method) {
3483 return method->obj_field(_returnType_offset);
3484 }
3485
3486 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3487 method->obj_field_put(_returnType_offset, value);
3488 }
3489
3490 oop java_lang_reflect_Method::parameter_types(oop method) {
3491 return method->obj_field(_parameterTypes_offset);
3492 }
3493
3494 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3495 method->obj_field_put(_parameterTypes_offset, value);
3496 }
3497
3498 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3499 method->obj_field_put(_exceptionTypes_offset, value);
3500 }
3501
3502 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3503 method->int_field_put(_modifiers_offset, value);
3504 }
3505
3506 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3507 method->obj_field_put(_signature_offset, value);
3508 }
3509
3510 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3511 method->obj_field_put(_annotations_offset, value);
3512 }
3513
3514 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3515 method->obj_field_put(_parameter_annotations_offset, value);
3516 }
3517
3518 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3519 method->obj_field_put(_annotation_default_offset, value);
3520 }
3521
3522 int java_lang_reflect_Constructor::_clazz_offset;
3523 int java_lang_reflect_Constructor::_parameterTypes_offset;
3524 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3525 int java_lang_reflect_Constructor::_slot_offset;
3526 int java_lang_reflect_Constructor::_modifiers_offset;
3527 int java_lang_reflect_Constructor::_signature_offset;
3528 int java_lang_reflect_Constructor::_annotations_offset;
3529 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3530
3531 #define CONSTRUCTOR_FIELDS_DO(macro) \
3532 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3533 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3534 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3535 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3536 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3537 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3538 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3539 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3540
3541 void java_lang_reflect_Constructor::compute_offsets() {
3542 InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3543 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3544 }
3545
3546 #if INCLUDE_CDS
3547 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3548 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3549 }
3550 #endif
3551
3552 Handle java_lang_reflect_Constructor::create(TRAPS) {
3553 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3554 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3555 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3556 InstanceKlass* ik = InstanceKlass::cast(k);
3557 // Ensure it is initialized
3558 ik->initialize(CHECK_NH);
3559 return ik->allocate_instance_handle(THREAD);
3560 }
3561
3562 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3563 return reflect->obj_field(_clazz_offset);
3564 }
3565
3566 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3567 reflect->obj_field_put(_clazz_offset, value);
3568 }
3569
3570 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3571 return constructor->obj_field(_parameterTypes_offset);
3572 }
3573
3574 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3575 constructor->obj_field_put(_parameterTypes_offset, value);
3576 }
3577
3578 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3579 constructor->obj_field_put(_exceptionTypes_offset, value);
3580 }
3581
3582 int java_lang_reflect_Constructor::slot(oop reflect) {
3583 return reflect->int_field(_slot_offset);
3584 }
3585
3586 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3587 reflect->int_field_put(_slot_offset, value);
3588 }
3589
3590 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3591 constructor->int_field_put(_modifiers_offset, value);
3592 }
3593
3594 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3595 constructor->obj_field_put(_signature_offset, value);
3596 }
3597
3598 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3599 constructor->obj_field_put(_annotations_offset, value);
3600 }
3601
3602 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3603 method->obj_field_put(_parameter_annotations_offset, value);
3604 }
3605
3606 int java_lang_reflect_Field::_clazz_offset;
3607 int java_lang_reflect_Field::_name_offset;
3608 int java_lang_reflect_Field::_type_offset;
3609 int java_lang_reflect_Field::_slot_offset;
3610 int java_lang_reflect_Field::_modifiers_offset;
3611 int java_lang_reflect_Field::_flags_offset;
3612 int java_lang_reflect_Field::_signature_offset;
3613 int java_lang_reflect_Field::_annotations_offset;
3614
3615 #define FIELD_FIELDS_DO(macro) \
3616 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3617 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3618 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \
3619 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3620 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3621 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3622 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3623 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3624
3625 void java_lang_reflect_Field::compute_offsets() {
3626 InstanceKlass* k = vmClasses::reflect_Field_klass();
3627 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3628 }
3629
3630 #if INCLUDE_CDS
3631 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3632 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3633 }
3634 #endif
3635
3636 Handle java_lang_reflect_Field::create(TRAPS) {
3637 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3638 Symbol* name = vmSymbols::java_lang_reflect_Field();
3639 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3640 InstanceKlass* ik = InstanceKlass::cast(k);
3641 // Ensure it is initialized
3642 ik->initialize(CHECK_NH);
3643 return ik->allocate_instance_handle(THREAD);
3644 }
3645
3646 oop java_lang_reflect_Field::clazz(oop reflect) {
3647 return reflect->obj_field(_clazz_offset);
3648 }
3649
3650 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3651 reflect->obj_field_put(_clazz_offset, value);
3652 }
3653
3654 oop java_lang_reflect_Field::name(oop field) {
3655 return field->obj_field(_name_offset);
3656 }
3657
3658 void java_lang_reflect_Field::set_name(oop field, oop value) {
3659 field->obj_field_put(_name_offset, value);
3660 }
3661
3662 oop java_lang_reflect_Field::type(oop field) {
3663 return field->obj_field(_type_offset);
3664 }
3665
3666 void java_lang_reflect_Field::set_type(oop field, oop value) {
3667 field->obj_field_put(_type_offset, value);
3668 }
3669
3670 int java_lang_reflect_Field::slot(oop reflect) {
3671 return reflect->int_field(_slot_offset);
3672 }
3673
3674 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3675 reflect->int_field_put(_slot_offset, value);
3676 }
3677
3678 int java_lang_reflect_Field::modifiers(oop field) {
3679 return field->int_field(_modifiers_offset);
3680 }
3681
3682 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3683 field->int_field_put(_modifiers_offset, value);
3684 }
3685
3686 void java_lang_reflect_Field::set_flags(oop field, int value) {
3687 field->int_field_put(_flags_offset, value);
3688 }
3689
3690 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3691 field->obj_field_put(_signature_offset, value);
3692 }
3693
3694 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3695 field->obj_field_put(_annotations_offset, value);
3696 }
3697
3698 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3699 // Allocate java.lang.reflect.RecordComponent instance
3700 HandleMark hm(THREAD);
3701 InstanceKlass* ik = vmClasses::RecordComponent_klass();
3702 assert(ik != nullptr, "must be loaded");
3703 ik->initialize(CHECK_NULL);
3704
3705 Handle element = ik->allocate_instance_handle(CHECK_NULL);
3706
3707 Handle decl_class(THREAD, holder->java_mirror());
3708 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3709
3710 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3711 oop component_name = StringTable::intern(name, CHECK_NULL);
3712 java_lang_reflect_RecordComponent::set_name(element(), component_name);
3713
3714 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3715 Handle component_type_h =
3716 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3717 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3718
3719 Method* accessor_method = nullptr;
3720 {
3721 // Prepend "()" to type to create the full method signature.
3722 ResourceMark rm(THREAD);
3723 int sig_len = type->utf8_length() + 3; // "()" and null char
3724 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3725 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3726 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3727 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3728 }
3729
3730 if (accessor_method != nullptr) {
3731 methodHandle method(THREAD, accessor_method);
3732 oop m = Reflection::new_method(method, false, CHECK_NULL);
3733 java_lang_reflect_RecordComponent::set_accessor(element(), m);
3734 } else {
3735 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3736 }
3737
3738 int sig_index = component->generic_signature_index();
3739 if (sig_index > 0) {
3740 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3741 oop component_sig = StringTable::intern(sig, CHECK_NULL);
3742 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3743 } else {
3744 java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3745 }
3746
3747 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3748 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3749
3750 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3751 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3752
3753 return element();
3754 }
3755
3756 int reflect_ConstantPool::_oop_offset;
3757
3758 #define CONSTANTPOOL_FIELDS_DO(macro) \
3759 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3760
3761 void reflect_ConstantPool::compute_offsets() {
3762 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3763 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3764 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3765 }
3766
3767 #if INCLUDE_CDS
3768 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3769 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3770 }
3771 #endif
3772
3773 int java_lang_reflect_Parameter::_name_offset;
3774 int java_lang_reflect_Parameter::_modifiers_offset;
3775 int java_lang_reflect_Parameter::_index_offset;
3776 int java_lang_reflect_Parameter::_executable_offset;
3777
3778 #define PARAMETER_FIELDS_DO(macro) \
3779 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3780 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3781 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \
3782 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3783
3784 void java_lang_reflect_Parameter::compute_offsets() {
3785 InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3786 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3787 }
3788
3789 #if INCLUDE_CDS
3790 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3791 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3792 }
3793 #endif
3794
3795 Handle java_lang_reflect_Parameter::create(TRAPS) {
3796 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3797 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3798 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3799 InstanceKlass* ik = InstanceKlass::cast(k);
3800 // Ensure it is initialized
3801 ik->initialize(CHECK_NH);
3802 return ik->allocate_instance_handle(THREAD);
3803 }
3804
3805 oop java_lang_reflect_Parameter::name(oop param) {
3806 return param->obj_field(_name_offset);
3807 }
3808
3809 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3810 param->obj_field_put(_name_offset, value);
3811 }
3812
3813 int java_lang_reflect_Parameter::modifiers(oop param) {
3814 return param->int_field(_modifiers_offset);
3815 }
3816
3817 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3818 param->int_field_put(_modifiers_offset, value);
3819 }
3820
3821 int java_lang_reflect_Parameter::index(oop param) {
3822 return param->int_field(_index_offset);
3823 }
3824
3825 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3826 param->int_field_put(_index_offset, value);
3827 }
3828
3829 oop java_lang_reflect_Parameter::executable(oop param) {
3830 return param->obj_field(_executable_offset);
3831 }
3832
3833 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3834 param->obj_field_put(_executable_offset, value);
3835 }
3836
3837 // java_lang_Module
3838
3839 int java_lang_Module::_loader_offset;
3840 int java_lang_Module::_name_offset;
3841 int java_lang_Module::_module_entry_offset;
3842
3843 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3844 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3845 return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3846 vmSymbols::java_lang_module_init_signature(),
3847 loader, module_name, CHECK_NH);
3848 }
3849
3850 #define MODULE_FIELDS_DO(macro) \
3851 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3852 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false)
3853
3854 void java_lang_Module::compute_offsets() {
3855 InstanceKlass* k = vmClasses::Module_klass();
3856 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3857 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3858 }
3859
3860 #if INCLUDE_CDS
3861 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3862 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3863 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3864 }
3865 #endif
3866
3867 oop java_lang_Module::loader(oop module) {
3868 return module->obj_field(_loader_offset);
3869 }
3870
3871 void java_lang_Module::set_loader(oop module, oop value) {
3872 module->obj_field_put(_loader_offset, value);
3873 }
3874
3875 oop java_lang_Module::name(oop module) {
3876 return module->obj_field(_name_offset);
3877 }
3878
3879 void java_lang_Module::set_name(oop module, oop value) {
3880 module->obj_field_put(_name_offset, value);
3881 }
3882
3883 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3884 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3885 assert(module != nullptr, "module can't be null");
3886 assert(oopDesc::is_oop(module), "module must be oop");
3887
3888 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3889 return module_entry;
3890 }
3891
3892 ModuleEntry* java_lang_Module::module_entry(oop module) {
3893 ModuleEntry* module_entry = module_entry_raw(module);
3894 if (module_entry == nullptr) {
3895 // If the inject field containing the ModuleEntry* is null then return the
3896 // class loader's unnamed module.
3897 oop loader = java_lang_Module::loader(module);
3898 Handle h_loader = Handle(Thread::current(), loader);
3899 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3900 return loader_cld->unnamed_module();
3901 }
3902 return module_entry;
3903 }
3904
3905 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3906 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3907 assert(module != nullptr, "module can't be null");
3908 assert(oopDesc::is_oop(module), "module must be oop");
3909 module->address_field_put(_module_entry_offset, (address)module_entry);
3910 }
3911
3912 Handle reflect_ConstantPool::create(TRAPS) {
3913 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3914 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3915 // Ensure it is initialized
3916 k->initialize(CHECK_NH);
3917 return k->allocate_instance_handle(THREAD);
3918 }
3919
3920
3921 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3922 oop mirror = value->pool_holder()->java_mirror();
3923 // Save the mirror to get back the constant pool.
3924 reflect->obj_field_put(_oop_offset, mirror);
3925 }
3926
3927 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3928
3929 oop mirror = reflect->obj_field(_oop_offset);
3930 Klass* k = java_lang_Class::as_Klass(mirror);
3931 assert(k->is_instance_klass(), "Must be");
3932
3933 // Get the constant pool back from the klass. Since class redefinition
3934 // merges the new constant pool into the old, this is essentially the
3935 // same constant pool as the original. If constant pool merging is
3936 // no longer done in the future, this will have to change to save
3937 // the original.
3938 return InstanceKlass::cast(k)->constants();
3939 }
3940
3941
3942 // Support for java_lang_ref_Reference
3943
3944 bool java_lang_ref_Reference::_offsets_initialized;
3945
3946 int java_lang_ref_Reference::_referent_offset;
3947 int java_lang_ref_Reference::_queue_offset;
3948 int java_lang_ref_Reference::_next_offset;
3949 int java_lang_ref_Reference::_discovered_offset;
3950
3951 #define REFERENCE_FIELDS_DO(macro) \
3952 macro(_referent_offset, k, "referent", object_signature, false); \
3953 macro(_queue_offset, k, "queue", referencequeue_signature, false); \
3954 macro(_next_offset, k, "next", reference_signature, false); \
3955 macro(_discovered_offset, k, "discovered", reference_signature, false);
3956
3957 void java_lang_ref_Reference::compute_offsets() {
3958 if (_offsets_initialized) {
3959 return;
3960 }
3961 _offsets_initialized = true;
3962 InstanceKlass* k = vmClasses::Reference_klass();
3963 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3964 }
3965
3966 #if INCLUDE_CDS
3967 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3968 f->do_bool(&_offsets_initialized);
3969 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3970 }
3971 #endif
3972
3973 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3974 assert(obj != nullptr, "sanity");
3975 if (offset != _referent_offset) {
3976 return false;
3977 }
3978
3979 Klass* k = obj->klass();
3980 if (!k->is_instance_klass()) {
3981 return false;
3982 }
3983
3984 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3985 bool is_reference = ik->reference_type() != REF_NONE;
3986 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
3987 return is_reference;
3988 }
3989
3990 int* java_lang_boxing_object::_offsets;
3991
3992 #define BOXING_FIELDS_DO(macro) \
3993 macro(java_lang_boxing_object::_offsets[T_BOOLEAN - T_BOOLEAN], vmClasses::Boolean_klass(), "value", bool_signature, false); \
3994 macro(java_lang_boxing_object::_offsets[T_CHAR - T_BOOLEAN], vmClasses::Character_klass(), "value", char_signature, false); \
3995 macro(java_lang_boxing_object::_offsets[T_FLOAT - T_BOOLEAN], vmClasses::Float_klass(), "value", float_signature, false); \
3996 macro(java_lang_boxing_object::_offsets[T_DOUBLE - T_BOOLEAN], vmClasses::Double_klass(), "value", double_signature, false); \
3997 macro(java_lang_boxing_object::_offsets[T_BYTE - T_BOOLEAN], vmClasses::Byte_klass(), "value", byte_signature, false); \
3998 macro(java_lang_boxing_object::_offsets[T_SHORT - T_BOOLEAN], vmClasses::Short_klass(), "value", short_signature, false); \
3999 macro(java_lang_boxing_object::_offsets[T_INT - T_BOOLEAN], vmClasses::Integer_klass(), "value", int_signature, false); \
4000 macro(java_lang_boxing_object::_offsets[T_LONG - T_BOOLEAN], vmClasses::Long_klass(), "value", long_signature, false);
4001
4002 void java_lang_boxing_object::compute_offsets() {
4003 assert(T_LONG - T_BOOLEAN == 7, "Sanity check");
4004 java_lang_boxing_object::_offsets = NEW_C_HEAP_ARRAY(int, 8, mtInternal);
4005 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4006 }
4007
4008 #if INCLUDE_CDS
4009 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
4010 if (f->reading()) {
4011 assert(T_LONG - T_BOOLEAN == 7, "Sanity check");
4012 java_lang_boxing_object::_offsets = NEW_C_HEAP_ARRAY(int, 8, mtInternal);
4013 }
4014 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4015 }
4016 #endif
4017
4018 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
4019 Klass* k = vmClasses::box_klass(type);
4020 if (k == nullptr) return nullptr;
4021 InstanceKlass* ik = InstanceKlass::cast(k);
4022 if (!ik->is_initialized()) {
4023 ik->initialize(CHECK_NULL);
4024 }
4025 return ik->allocate_instance(THREAD);
4026 }
4027
4028
4029 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
4030 oop box = initialize_and_allocate(type, CHECK_NULL);
4031 if (box == nullptr) return nullptr;
4032 switch (type) {
4033 case T_BOOLEAN:
4034 box->bool_field_put(value_offset(type), value->z);
4035 break;
4036 case T_CHAR:
4037 box->char_field_put(value_offset(type), value->c);
4038 break;
4039 case T_FLOAT:
4040 box->float_field_put(value_offset(type), value->f);
4041 break;
4042 case T_DOUBLE:
4043 box->double_field_put(value_offset(type), value->d);
4044 break;
4045 case T_BYTE:
4046 box->byte_field_put(value_offset(type), value->b);
4047 break;
4048 case T_SHORT:
4049 box->short_field_put(value_offset(type), value->s);
4050 break;
4051 case T_INT:
4052 box->int_field_put(value_offset(type), value->i);
4053 break;
4054 case T_LONG:
4055 box->long_field_put(value_offset(type), value->j);
4056 break;
4057 default:
4058 return nullptr;
4059 }
4060 return box;
4061 }
4062
4063
4064 BasicType java_lang_boxing_object::basic_type(oop box) {
4065 if (box == nullptr) return T_ILLEGAL;
4066 BasicType type = vmClasses::box_klass_type(box->klass());
4067 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
4068 return T_ILLEGAL;
4069 return type;
4070 }
4071
4072
4073 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
4074 BasicType type = vmClasses::box_klass_type(box->klass());
4075 switch (type) {
4076 case T_BOOLEAN:
4077 value->z = box->bool_field(value_offset(type));
4078 break;
4079 case T_CHAR:
4080 value->c = box->char_field(value_offset(type));
4081 break;
4082 case T_FLOAT:
4083 value->f = box->float_field(value_offset(type));
4084 break;
4085 case T_DOUBLE:
4086 value->d = box->double_field(value_offset(type));
4087 break;
4088 case T_BYTE:
4089 value->b = box->byte_field(value_offset(type));
4090 break;
4091 case T_SHORT:
4092 value->s = box->short_field(value_offset(type));
4093 break;
4094 case T_INT:
4095 value->i = box->int_field(value_offset(type));
4096 break;
4097 case T_LONG:
4098 value->j = box->long_field(value_offset(type));
4099 break;
4100 default:
4101 return T_ILLEGAL;
4102 } // end switch
4103 return type;
4104 }
4105
4106
4107 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
4108 BasicType type = vmClasses::box_klass_type(box->klass());
4109 switch (type) {
4110 case T_BOOLEAN:
4111 box->bool_field_put(value_offset(type), value->z);
4112 break;
4113 case T_CHAR:
4114 box->char_field_put(value_offset(type), value->c);
4115 break;
4116 case T_FLOAT:
4117 box->float_field_put(value_offset(type), value->f);
4118 break;
4119 case T_DOUBLE:
4120 box->double_field_put(value_offset(type), value->d);
4121 break;
4122 case T_BYTE:
4123 box->byte_field_put(value_offset(type), value->b);
4124 break;
4125 case T_SHORT:
4126 box->short_field_put(value_offset(type), value->s);
4127 break;
4128 case T_INT:
4129 box->int_field_put(value_offset(type), value->i);
4130 break;
4131 case T_LONG:
4132 box->long_field_put(value_offset(type), value->j);
4133 break;
4134 default:
4135 return T_ILLEGAL;
4136 } // end switch
4137 return type;
4138 }
4139
4140
4141 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
4142 switch (type) {
4143 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
4144 case T_CHAR: st->print("%d", value->c); break;
4145 case T_BYTE: st->print("%d", value->b); break;
4146 case T_SHORT: st->print("%d", value->s); break;
4147 case T_INT: st->print("%d", value->i); break;
4148 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
4149 case T_FLOAT: st->print("%f", value->f); break;
4150 case T_DOUBLE: st->print("%lf", value->d); break;
4151 default: st->print("type %d?", type); break;
4152 }
4153 }
4154
4155
4156 // Support for java_lang_ref_SoftReference
4157 //
4158
4159 int java_lang_ref_SoftReference::_timestamp_offset;
4160 int java_lang_ref_SoftReference::_static_clock_offset;
4161
4162 #define SOFTREFERENCE_FIELDS_DO(macro) \
4163 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
4164 macro(_static_clock_offset, k, "clock", long_signature, true)
4165
4166 void java_lang_ref_SoftReference::compute_offsets() {
4167 InstanceKlass* k = vmClasses::SoftReference_klass();
4168 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4169 }
4170
4171 #if INCLUDE_CDS
4172 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
4173 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4174 }
4175 #endif
4176
4177 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
4178 return ref->long_field(_timestamp_offset);
4179 }
4180
4181 jlong java_lang_ref_SoftReference::clock() {
4182 InstanceKlass* ik = vmClasses::SoftReference_klass();
4183 oop base = ik->static_field_base_raw();
4184 return base->long_field(_static_clock_offset);
4185 }
4186
4187 void java_lang_ref_SoftReference::set_clock(jlong value) {
4188 InstanceKlass* ik = vmClasses::SoftReference_klass();
4189 oop base = ik->static_field_base_raw();
4190 base->long_field_put(_static_clock_offset, value);
4191 }
4192
4193 // Support for java_lang_invoke_DirectMethodHandle
4194
4195 int java_lang_invoke_DirectMethodHandle::_member_offset;
4196
4197 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
4198 oop member_name = nullptr;
4199 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
4200 "a DirectMethodHandle oop is expected");
4201 return dmh->obj_field(_member_offset);
4202 }
4203
4204 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
4205 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
4206
4207 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
4208 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
4209 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4210 }
4211
4212 #if INCLUDE_CDS
4213 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
4214 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4215 }
4216 #endif
4217
4218 // Support for java_lang_invoke_MethodHandle
4219
4220 int java_lang_invoke_MethodHandle::_type_offset;
4221 int java_lang_invoke_MethodHandle::_form_offset;
4222
4223 int java_lang_invoke_MemberName::_clazz_offset;
4224 int java_lang_invoke_MemberName::_name_offset;
4225 int java_lang_invoke_MemberName::_type_offset;
4226 int java_lang_invoke_MemberName::_flags_offset;
4227 int java_lang_invoke_MemberName::_method_offset;
4228 int java_lang_invoke_MemberName::_vmindex_offset;
4229
4230 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
4231 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
4232
4233 int java_lang_invoke_LambdaForm::_vmentry_offset;
4234
4235 #define METHODHANDLE_FIELDS_DO(macro) \
4236 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4237 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
4238
4239 void java_lang_invoke_MethodHandle::compute_offsets() {
4240 InstanceKlass* k = vmClasses::MethodHandle_klass();
4241 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4242 }
4243
4244 #if INCLUDE_CDS
4245 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4246 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4247 }
4248 #endif
4249
4250 #define MEMBERNAME_FIELDS_DO(macro) \
4251 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4252 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4253 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
4254 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
4255 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
4256
4257 void java_lang_invoke_MemberName::compute_offsets() {
4258 InstanceKlass* k = vmClasses::MemberName_klass();
4259 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4260 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4261 }
4262
4263 #if INCLUDE_CDS
4264 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4265 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4266 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4267 }
4268 #endif
4269
4270 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4271 macro(_vmholder_offset, k, "vmholder", class_signature, false)
4272
4273 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4274 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4275 assert(k != nullptr, "jdk mismatch");
4276 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4277 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4278 }
4279
4280 #if INCLUDE_CDS
4281 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4282 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4283 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4284 }
4285 #endif
4286
4287 #define LAMBDAFORM_FIELDS_DO(macro) \
4288 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4289
4290 void java_lang_invoke_LambdaForm::compute_offsets() {
4291 InstanceKlass* k = vmClasses::LambdaForm_klass();
4292 assert (k != nullptr, "jdk mismatch");
4293 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4294 }
4295
4296 #if INCLUDE_CDS
4297 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4298 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4299 }
4300 #endif
4301
4302 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4303 return obj != nullptr && is_subclass(obj->klass());
4304 }
4305
4306 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4307 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4308
4309 #define NEP_FIELDS_DO(macro) \
4310 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
4311 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4312
4313 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4314 return obj != nullptr && is_subclass(obj->klass());
4315 }
4316
4317 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4318 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4319 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4320 }
4321
4322 #if INCLUDE_CDS
4323 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4324 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4325 }
4326 #endif
4327
4328 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4329 return entry->obj_field(_method_type_offset);
4330 }
4331
4332 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4333 return entry->long_field(_downcall_stub_address_offset);
4334 }
4335
4336 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4337 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4338 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4339 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4340 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4341 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4342 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4343
4344 #define ABIDescriptor_FIELDS_DO(macro) \
4345 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4346 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4347 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4348 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4349 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4350 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4351 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4352
4353 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4354 return obj != nullptr && is_subclass(obj->klass());
4355 }
4356
4357 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4358 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4359 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4360 }
4361
4362 #if INCLUDE_CDS
4363 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4364 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4365 }
4366 #endif
4367
4368 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4369 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4370 }
4371
4372 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4373 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4374 }
4375
4376 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4377 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4378 }
4379
4380 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4381 return entry->int_field(_stackAlignment_offset);
4382 }
4383
4384 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4385 return entry->int_field(_shadowSpace_offset);
4386 }
4387
4388 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4389 return entry->obj_field(_scratch1_offset);
4390 }
4391
4392 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4393 return entry->obj_field(_scratch2_offset);
4394 }
4395
4396 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4397 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4398 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4399 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4400
4401 #define VMStorage_FIELDS_DO(macro) \
4402 macro(_type_offset, k, "type", byte_signature, false); \
4403 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4404 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4405 macro(_debugName_offset, k, "debugName", string_signature, false); \
4406
4407 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4408 return obj != nullptr && is_subclass(obj->klass());
4409 }
4410
4411 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4412 InstanceKlass* k = vmClasses::VMStorage_klass();
4413 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4414 }
4415
4416 #if INCLUDE_CDS
4417 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4418 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4419 }
4420 #endif
4421
4422 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4423 return entry->byte_field(_type_offset);
4424 }
4425
4426 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4427 return entry->int_field(_indexOrOffset_offset);
4428 }
4429
4430 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4431 return entry->short_field(_segmentMaskOrSize_offset);
4432 }
4433
4434 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4435 return entry->obj_field(_debugName_offset);
4436 }
4437
4438 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4439 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4440
4441 #define CallConv_FIELDS_DO(macro) \
4442 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4443 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4444
4445 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4446 return obj != nullptr && is_subclass(obj->klass());
4447 }
4448
4449 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4450 InstanceKlass* k = vmClasses::CallConv_klass();
4451 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4452 }
4453
4454 #if INCLUDE_CDS
4455 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4456 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4457 }
4458 #endif
4459
4460 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4461 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4462 }
4463
4464 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4465 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4466 }
4467
4468 oop java_lang_invoke_MethodHandle::type(oop mh) {
4469 return mh->obj_field(_type_offset);
4470 }
4471
4472 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4473 mh->obj_field_put(_type_offset, mtype);
4474 }
4475
4476 oop java_lang_invoke_MethodHandle::form(oop mh) {
4477 assert(_form_offset != 0, "");
4478 return mh->obj_field(_form_offset);
4479 }
4480
4481 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4482 assert(_form_offset != 0, "");
4483 mh->obj_field_put(_form_offset, lform);
4484 }
4485
4486 /// MemberName accessors
4487
4488 oop java_lang_invoke_MemberName::clazz(oop mname) {
4489 assert(is_instance(mname), "wrong type");
4490 return mname->obj_field(_clazz_offset);
4491 }
4492
4493 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4494 assert(is_instance(mname), "wrong type");
4495 mname->obj_field_put(_clazz_offset, clazz);
4496 }
4497
4498 oop java_lang_invoke_MemberName::name(oop mname) {
4499 assert(is_instance(mname), "wrong type");
4500 return mname->obj_field(_name_offset);
4501 }
4502
4503 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4504 assert(is_instance(mname), "wrong type");
4505 mname->obj_field_put(_name_offset, name);
4506 }
4507
4508 oop java_lang_invoke_MemberName::type(oop mname) {
4509 assert(is_instance(mname), "wrong type");
4510 return mname->obj_field(_type_offset);
4511 }
4512
4513 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4514 assert(is_instance(mname), "wrong type");
4515 mname->obj_field_put(_type_offset, type);
4516 }
4517
4518 int java_lang_invoke_MemberName::flags(oop mname) {
4519 assert(is_instance(mname), "wrong type");
4520 return mname->int_field(_flags_offset);
4521 }
4522
4523 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4524 assert(is_instance(mname), "wrong type");
4525 mname->int_field_put(_flags_offset, flags);
4526 }
4527
4528 // Return vmtarget from ResolvedMethodName method field through indirection
4529 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4530 assert(is_instance(mname), "wrong type");
4531 oop method = mname->obj_field(_method_offset);
4532 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4533 }
4534
4535 bool java_lang_invoke_MemberName::is_method(oop mname) {
4536 assert(is_instance(mname), "must be MemberName");
4537 return (flags(mname) & (MN_IS_METHOD | MN_IS_OBJECT_CONSTRUCTOR)) > 0;
4538 }
4539
4540 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4541 assert(is_instance(mname), "wrong type");
4542 mname->obj_field_put(_method_offset, resolved_method);
4543 }
4544
4545 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4546 assert(is_instance(mname), "wrong type");
4547 return (intptr_t) mname->address_field(_vmindex_offset);
4548 }
4549
4550 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4551 assert(is_instance(mname), "wrong type");
4552 mname->address_field_put(_vmindex_offset, (address) index);
4553 }
4554
4555
4556 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4557 assert(is_instance(resolved_method), "wrong type");
4558 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4559 assert(m->is_method(), "must be");
4560 return m;
4561 }
4562
4563 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4564 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4565 assert(is_instance(resolved_method), "wrong type");
4566 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4567 }
4568
4569 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4570 assert(is_instance(resolved_method), "wrong type");
4571 resolved_method->obj_field_put(_vmholder_offset, holder);
4572 }
4573
4574 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4575 const Method* method = m();
4576
4577 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4578 oop resolved_method = ResolvedMethodTable::find_method(method);
4579 if (resolved_method != nullptr) {
4580 return resolved_method;
4581 }
4582
4583 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4584 if (!k->is_initialized()) {
4585 k->initialize(CHECK_NULL);
4586 }
4587
4588 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4589
4590 NoSafepointVerifier nsv;
4591
4592 if (method->is_old()) {
4593 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4594 method->get_new_method();
4595 }
4596
4597 InstanceKlass* holder = method->method_holder();
4598
4599 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4600 // Add a reference to the loader (actually mirror because hidden classes may not have
4601 // distinct loaders) to ensure the metadata is kept alive.
4602 // This mirror may be different than the one in clazz field.
4603 set_vmholder(new_resolved_method, holder->java_mirror());
4604
4605 // Set flag in class to indicate this InstanceKlass has entries in the table
4606 // to avoid walking table during redefinition if none of the redefined classes
4607 // have any membernames in the table.
4608 holder->set_has_resolved_methods();
4609
4610 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4611 }
4612
4613 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4614 assert(is_instance(lform), "wrong type");
4615 return lform->obj_field(_vmentry_offset);
4616 }
4617
4618
4619 // Support for java_lang_invoke_MethodType
4620
4621 int java_lang_invoke_MethodType::_rtype_offset;
4622 int java_lang_invoke_MethodType::_ptypes_offset;
4623
4624 #define METHODTYPE_FIELDS_DO(macro) \
4625 macro(_rtype_offset, k, "rtype", class_signature, false); \
4626 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4627
4628 void java_lang_invoke_MethodType::compute_offsets() {
4629 InstanceKlass* k = vmClasses::MethodType_klass();
4630 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4631 }
4632
4633 #if INCLUDE_CDS
4634 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4635 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4636 }
4637 #endif
4638
4639 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4640 st->print("(");
4641 objArrayOop pts = ptypes(mt);
4642 if (pts != nullptr) {
4643 for (int i = 0, limit = pts->length(); i < limit; i++) {
4644 java_lang_Class::print_signature(pts->obj_at(i), st);
4645 }
4646 } else {
4647 st->print("null");
4648 }
4649 st->print(")");
4650 oop rt = rtype(mt);
4651 if (rt != nullptr) {
4652 java_lang_Class::print_signature(rt, st);
4653 } else {
4654 st->print("null");
4655 }
4656 }
4657
4658 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4659 ResourceMark rm;
4660 stringStream buffer(128);
4661 print_signature(mt, &buffer);
4662 const char* sigstr = buffer.base();
4663 int siglen = (int) buffer.size();
4664 Symbol *name;
4665 if (!intern_if_not_found) {
4666 name = SymbolTable::probe(sigstr, siglen);
4667 } else {
4668 name = SymbolTable::new_symbol(sigstr, siglen);
4669 }
4670 return name;
4671 }
4672
4673 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4674 if (mt1 == mt2)
4675 return true;
4676 if (rtype(mt1) != rtype(mt2))
4677 return false;
4678 if (ptype_count(mt1) != ptype_count(mt2))
4679 return false;
4680 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4681 if (ptype(mt1, i) != ptype(mt2, i))
4682 return false;
4683 }
4684 return true;
4685 }
4686
4687 oop java_lang_invoke_MethodType::rtype(oop mt) {
4688 assert(is_instance(mt), "must be a MethodType");
4689 return mt->obj_field(_rtype_offset);
4690 }
4691
4692 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4693 assert(is_instance(mt), "must be a MethodType");
4694 return (objArrayOop) mt->obj_field(_ptypes_offset);
4695 }
4696
4697 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4698 return ptypes(mt)->obj_at(idx);
4699 }
4700
4701 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4702 return ptypes(mt)->length();
4703 }
4704
4705 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4706 objArrayOop pts = ptypes(mt);
4707 int count = pts->length();
4708 int slots = 0;
4709 for (int i = 0; i < count; i++) {
4710 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4711 slots += type2size[bt];
4712 }
4713 return slots;
4714 }
4715
4716 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4717 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4718 return type2size[bt];
4719 }
4720
4721
4722 // Support for java_lang_invoke_CallSite
4723
4724 int java_lang_invoke_CallSite::_target_offset;
4725 int java_lang_invoke_CallSite::_vmdependencies_offset;
4726 int java_lang_invoke_CallSite::_last_cleanup_offset;
4727
4728 #define CALLSITE_FIELDS_DO(macro) \
4729 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
4730
4731 void java_lang_invoke_CallSite::compute_offsets() {
4732 InstanceKlass* k = vmClasses::CallSite_klass();
4733 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4734 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4735 }
4736
4737 #if INCLUDE_CDS
4738 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4739 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4740 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4741 }
4742 #endif
4743
4744 DependencyContext java_lang_invoke_CallSite::vmdependencies(oop call_site) {
4745 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4746 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4747 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4748 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4749 return dep_ctx;
4750 }
4751
4752 // Support for java_lang_invoke_ConstantCallSite
4753
4754 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4755
4756 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4757 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4758
4759 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4760 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4761 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4762 }
4763
4764 #if INCLUDE_CDS
4765 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4766 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4767 }
4768 #endif
4769
4770 // Support for java_lang_ClassLoader
4771
4772 int java_lang_ClassLoader::_loader_data_offset;
4773 int java_lang_ClassLoader::_parallelCapable_offset;
4774 int java_lang_ClassLoader::_name_offset;
4775 int java_lang_ClassLoader::_nameAndId_offset;
4776 int java_lang_ClassLoader::_unnamedModule_offset;
4777 int java_lang_ClassLoader::_parent_offset;
4778
4779 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4780 assert(loader != nullptr, "loader must not be null");
4781 assert(oopDesc::is_oop(loader), "loader must be oop");
4782 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4783 }
4784
4785 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4786 assert(loader != nullptr, "loader must not be null");
4787 assert(oopDesc::is_oop(loader), "loader must be oop");
4788 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4789 }
4790
4791 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4792 assert(loader != nullptr, "loader must not be null");
4793 assert(oopDesc::is_oop(loader), "loader must be oop");
4794 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4795 }
4796
4797 #define CLASSLOADER_FIELDS_DO(macro) \
4798 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4799 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4800 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
4801 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4802 macro(_parent_offset, k1, "parent", classloader_signature, false)
4803
4804 void java_lang_ClassLoader::compute_offsets() {
4805 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4806 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4807
4808 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4809 }
4810
4811 #if INCLUDE_CDS
4812 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4813 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4814 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4815 }
4816 #endif
4817
4818 oop java_lang_ClassLoader::parent(oop loader) {
4819 assert(is_instance(loader), "loader must be oop");
4820 return loader->obj_field(_parent_offset);
4821 }
4822
4823 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4824 assert(is_instance(loader), "loader must be oop");
4825 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4826 }
4827
4828 // Returns the name field of this class loader. If the name field has not
4829 // been set, null will be returned.
4830 oop java_lang_ClassLoader::name(oop loader) {
4831 assert(is_instance(loader), "loader must be oop");
4832 return loader->obj_field(_name_offset);
4833 }
4834
4835 // Returns the nameAndId field of this class loader. The format is
4836 // as follows:
4837 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4838 // If the defining loader has no name then <qualified-class-name> @<id>
4839 // If built-in loader, then omit '@<id>' as there is only one instance.
4840 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4841 oop java_lang_ClassLoader::nameAndId(oop loader) {
4842 assert(is_instance(loader), "loader must be oop");
4843 return loader->obj_field(_nameAndId_offset);
4844 }
4845
4846 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4847 assert(is_instance(loader), "loader must be oop");
4848 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4849 oop acl = loader;
4850 debug_only(jint loop_count = 0);
4851 // This loop taken verbatim from ClassLoader.java:
4852 do {
4853 acl = parent(acl);
4854 if (cl == acl) {
4855 return true;
4856 }
4857 assert(++loop_count > 0, "loop_count overflow");
4858 } while (acl != nullptr);
4859 return false;
4860 }
4861
4862 bool java_lang_ClassLoader::is_instance(oop obj) {
4863 return obj != nullptr && is_subclass(obj->klass());
4864 }
4865
4866
4867 // For class loader classes, parallelCapable defined
4868 // based on non-null field
4869 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4870 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4871 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4872 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4873 }
4874
4875 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4876 oop cl = SystemDictionary::java_system_loader();
4877 while(cl != nullptr) {
4878 if (cl == loader) return true;
4879 cl = parent(cl);
4880 }
4881 return false;
4882 }
4883
4884 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4885 assert(is_instance(loader), "loader must be oop");
4886 return loader->obj_field(_unnamedModule_offset);
4887 }
4888
4889 // Support for java_lang_System
4890 //
4891
4892 int java_lang_System::_static_in_offset;
4893 int java_lang_System::_static_out_offset;
4894 int java_lang_System::_static_err_offset;
4895
4896 #define SYSTEM_FIELDS_DO(macro) \
4897 macro(_static_in_offset, k, "in", input_stream_signature, true); \
4898 macro(_static_out_offset, k, "out", print_stream_signature, true); \
4899 macro(_static_err_offset, k, "err", print_stream_signature, true);
4900
4901 void java_lang_System::compute_offsets() {
4902 InstanceKlass* k = vmClasses::System_klass();
4903 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4904 }
4905
4906 #if INCLUDE_CDS
4907 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4908 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4909 }
4910 #endif
4911
4912 // Support for jdk_internal_misc_UnsafeConstants
4913 //
4914 class UnsafeConstantsFixup : public FieldClosure {
4915 private:
4916 int _address_size;
4917 int _page_size;
4918 bool _big_endian;
4919 bool _use_unaligned_access;
4920 int _data_cache_line_flush_size;
4921 public:
4922 UnsafeConstantsFixup() {
4923 // round up values for all static final fields
4924 _address_size = sizeof(void*);
4925 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4926 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4927 _use_unaligned_access = UseUnalignedAccesses;
4928 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4929 }
4930
4931 void do_field(fieldDescriptor* fd) {
4932 oop mirror = fd->field_holder()->java_mirror();
4933 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4934 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4935 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4936 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4937 if (fd->name() == vmSymbols::address_size_name()) {
4938 mirror->int_field_put(fd->offset(), _address_size);
4939 } else if (fd->name() == vmSymbols::page_size_name()) {
4940 mirror->int_field_put(fd->offset(), _page_size);
4941 } else if (fd->name() == vmSymbols::big_endian_name()) {
4942 mirror->bool_field_put(fd->offset(), _big_endian);
4943 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4944 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4945 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4946 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4947 } else {
4948 assert(false, "unexpected UnsafeConstants field");
4949 }
4950 }
4951 };
4952
4953 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4954 UnsafeConstantsFixup fixup;
4955 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4956 }
4957
4958
4959 // java_lang_StackTraceElement
4960
4961 int java_lang_StackTraceElement::_methodName_offset;
4962 int java_lang_StackTraceElement::_fileName_offset;
4963 int java_lang_StackTraceElement::_lineNumber_offset;
4964 int java_lang_StackTraceElement::_moduleName_offset;
4965 int java_lang_StackTraceElement::_moduleVersion_offset;
4966 int java_lang_StackTraceElement::_classLoaderName_offset;
4967 int java_lang_StackTraceElement::_declaringClass_offset;
4968 int java_lang_StackTraceElement::_declaringClassObject_offset;
4969
4970 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4971 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4972 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4973 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
4974 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4975 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
4976 macro(_methodName_offset, k, "methodName", string_signature, false); \
4977 macro(_fileName_offset, k, "fileName", string_signature, false); \
4978 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
4979
4980 // Support for java_lang_StackTraceElement
4981 void java_lang_StackTraceElement::compute_offsets() {
4982 InstanceKlass* k = vmClasses::StackTraceElement_klass();
4983 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4984 }
4985
4986 #if INCLUDE_CDS
4987 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4988 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4989 }
4990 #endif
4991
4992 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4993 element->obj_field_put(_fileName_offset, value);
4994 }
4995
4996 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4997 element->obj_field_put(_declaringClass_offset, value);
4998 }
4999
5000 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
5001 element->obj_field_put(_methodName_offset, value);
5002 }
5003
5004 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
5005 element->int_field_put(_lineNumber_offset, value);
5006 }
5007
5008 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
5009 element->obj_field_put(_moduleName_offset, value);
5010 }
5011
5012 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
5013 element->obj_field_put(_moduleVersion_offset, value);
5014 }
5015
5016 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
5017 element->obj_field_put(_classLoaderName_offset, value);
5018 }
5019
5020 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
5021 element->obj_field_put(_declaringClassObject_offset, value);
5022 }
5023
5024
5025 // java_lang_AssertionStatusDirectives
5026
5027 int java_lang_AssertionStatusDirectives::_classes_offset;
5028 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
5029 int java_lang_AssertionStatusDirectives::_packages_offset;
5030 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
5031 int java_lang_AssertionStatusDirectives::_deflt_offset;
5032
5033 // Support for java Assertions - java_lang_AssertionStatusDirectives.
5034 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
5035 macro(_classes_offset, k, "classes", string_array_signature, false); \
5036 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
5037 macro(_packages_offset, k, "packages", string_array_signature, false); \
5038 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
5039 macro(_deflt_offset, k, "deflt", bool_signature, false)
5040
5041 void java_lang_AssertionStatusDirectives::compute_offsets() {
5042 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
5043 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5044 }
5045
5046 #if INCLUDE_CDS
5047 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
5048 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5049 }
5050 #endif
5051
5052 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
5053 o->obj_field_put(_classes_offset, val);
5054 }
5055
5056 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
5057 o->obj_field_put(_classEnabled_offset, val);
5058 }
5059
5060 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
5061 o->obj_field_put(_packages_offset, val);
5062 }
5063
5064 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
5065 o->obj_field_put(_packageEnabled_offset, val);
5066 }
5067
5068 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
5069 o->bool_field_put(_deflt_offset, val);
5070 }
5071
5072 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
5073
5074 #define AOS_FIELDS_DO(macro) \
5075 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
5076
5077 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
5078 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
5079 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5080 }
5081
5082 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
5083 assert(_owner_offset != 0, "Must be initialized");
5084 return obj->obj_field(_owner_offset);
5085 }
5086
5087 #if INCLUDE_CDS
5088 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
5089 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5090 }
5091 #endif
5092
5093 int vector_VectorPayload::_payload_offset;
5094
5095 #define VECTORPAYLOAD_FIELDS_DO(macro) \
5096 macro(_payload_offset, k, "payload", object_signature, false)
5097
5098 void vector_VectorPayload::compute_offsets() {
5099 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
5100 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5101 }
5102
5103 #if INCLUDE_CDS
5104 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
5105 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5106 }
5107 #endif
5108
5109 void vector_VectorPayload::set_payload(oop o, oop val) {
5110 o->obj_field_put(_payload_offset, val);
5111 }
5112
5113 bool vector_VectorPayload::is_instance(oop obj) {
5114 return obj != nullptr && is_subclass(obj->klass());
5115 }
5116
5117 int java_lang_Integer_IntegerCache::_static_cache_offset;
5118 int java_lang_Long_LongCache::_static_cache_offset;
5119 int java_lang_Character_CharacterCache::_static_cache_offset;
5120 int java_lang_Short_ShortCache::_static_cache_offset;
5121 int java_lang_Byte_ByteCache::_static_cache_offset;
5122
5123 #define INTEGER_CACHE_FIELDS_DO(macro) \
5124 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5125
5126 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5127 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5128 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5129 }
5130
5131 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5132 oop base = ik->static_field_base_raw();
5133 return objArrayOop(base->obj_field(_static_cache_offset));
5134 }
5135
5136 Symbol* java_lang_Integer_IntegerCache::symbol() {
5137 return vmSymbols::java_lang_Integer_IntegerCache();
5138 }
5139
5140 #if INCLUDE_CDS
5141 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5142 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5143 }
5144 #endif
5145 #undef INTEGER_CACHE_FIELDS_DO
5146
5147 jint java_lang_Integer::value(oop obj) {
5148 jvalue v;
5149 java_lang_boxing_object::get_value(obj, &v);
5150 return v.i;
5151 }
5152
5153 #define LONG_CACHE_FIELDS_DO(macro) \
5154 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5155
5156 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5157 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5158 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5159 }
5160
5161 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5162 oop base = ik->static_field_base_raw();
5163 return objArrayOop(base->obj_field(_static_cache_offset));
5164 }
5165
5166 Symbol* java_lang_Long_LongCache::symbol() {
5167 return vmSymbols::java_lang_Long_LongCache();
5168 }
5169
5170 #if INCLUDE_CDS
5171 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5172 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5173 }
5174 #endif
5175 #undef LONG_CACHE_FIELDS_DO
5176
5177 jlong java_lang_Long::value(oop obj) {
5178 jvalue v;
5179 java_lang_boxing_object::get_value(obj, &v);
5180 return v.j;
5181 }
5182
5183 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5184 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5185
5186 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5187 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5188 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5189 }
5190
5191 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5192 oop base = ik->static_field_base_raw();
5193 return objArrayOop(base->obj_field(_static_cache_offset));
5194 }
5195
5196 Symbol* java_lang_Character_CharacterCache::symbol() {
5197 return vmSymbols::java_lang_Character_CharacterCache();
5198 }
5199
5200 #if INCLUDE_CDS
5201 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5202 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5203 }
5204 #endif
5205 #undef CHARACTER_CACHE_FIELDS_DO
5206
5207 jchar java_lang_Character::value(oop obj) {
5208 jvalue v;
5209 java_lang_boxing_object::get_value(obj, &v);
5210 return v.c;
5211 }
5212
5213 #define SHORT_CACHE_FIELDS_DO(macro) \
5214 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5215
5216 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5217 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5218 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5219 }
5220
5221 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5222 oop base = ik->static_field_base_raw();
5223 return objArrayOop(base->obj_field(_static_cache_offset));
5224 }
5225
5226 Symbol* java_lang_Short_ShortCache::symbol() {
5227 return vmSymbols::java_lang_Short_ShortCache();
5228 }
5229
5230 #if INCLUDE_CDS
5231 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5232 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5233 }
5234 #endif
5235 #undef SHORT_CACHE_FIELDS_DO
5236
5237 jshort java_lang_Short::value(oop obj) {
5238 jvalue v;
5239 java_lang_boxing_object::get_value(obj, &v);
5240 return v.s;
5241 }
5242
5243 #define BYTE_CACHE_FIELDS_DO(macro) \
5244 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5245
5246 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5247 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5248 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5249 }
5250
5251 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5252 oop base = ik->static_field_base_raw();
5253 return objArrayOop(base->obj_field(_static_cache_offset));
5254 }
5255
5256 Symbol* java_lang_Byte_ByteCache::symbol() {
5257 return vmSymbols::java_lang_Byte_ByteCache();
5258 }
5259
5260 #if INCLUDE_CDS
5261 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5262 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5263 }
5264 #endif
5265 #undef BYTE_CACHE_FIELDS_DO
5266
5267 jbyte java_lang_Byte::value(oop obj) {
5268 jvalue v;
5269 java_lang_boxing_object::get_value(obj, &v);
5270 return v.b;
5271 }
5272
5273 int java_lang_Boolean::_static_TRUE_offset;
5274 int java_lang_Boolean::_static_FALSE_offset;
5275
5276 #define BOOLEAN_FIELDS_DO(macro) \
5277 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5278 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5279
5280
5281 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5282 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5283 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5284 }
5285
5286 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5287 oop base = ik->static_field_base_raw();
5288 return base->obj_field(_static_TRUE_offset);
5289 }
5290
5291 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5292 oop base = ik->static_field_base_raw();
5293 return base->obj_field(_static_FALSE_offset);
5294 }
5295
5296 Symbol* java_lang_Boolean::symbol() {
5297 return vmSymbols::java_lang_Boolean();
5298 }
5299
5300 #if INCLUDE_CDS
5301 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5302 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5303 }
5304 #endif
5305 #undef BOOLEAN_CACHE_FIELDS_DO
5306
5307 jboolean java_lang_Boolean::value(oop obj) {
5308 jvalue v;
5309 java_lang_boxing_object::get_value(obj, &v);
5310 return v.z;
5311 }
5312
5313 // java_lang_reflect_RecordComponent
5314
5315 int java_lang_reflect_RecordComponent::_clazz_offset;
5316 int java_lang_reflect_RecordComponent::_name_offset;
5317 int java_lang_reflect_RecordComponent::_type_offset;
5318 int java_lang_reflect_RecordComponent::_accessor_offset;
5319 int java_lang_reflect_RecordComponent::_signature_offset;
5320 int java_lang_reflect_RecordComponent::_annotations_offset;
5321 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5322
5323 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5324 macro(_clazz_offset, k, "clazz", class_signature, false); \
5325 macro(_name_offset, k, "name", string_signature, false); \
5326 macro(_type_offset, k, "type", class_signature, false); \
5327 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5328 macro(_signature_offset, k, "signature", string_signature, false); \
5329 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5330 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5331
5332 // Support for java_lang_reflect_RecordComponent
5333 void java_lang_reflect_RecordComponent::compute_offsets() {
5334 InstanceKlass* k = vmClasses::RecordComponent_klass();
5335 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5336 }
5337
5338 #if INCLUDE_CDS
5339 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5340 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5341 }
5342 #endif
5343
5344 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5345 element->obj_field_put(_clazz_offset, value);
5346 }
5347
5348 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5349 element->obj_field_put(_name_offset, value);
5350 }
5351
5352 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5353 element->obj_field_put(_type_offset, value);
5354 }
5355
5356 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5357 element->obj_field_put(_accessor_offset, value);
5358 }
5359
5360 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5361 element->obj_field_put(_signature_offset, value);
5362 }
5363
5364 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5365 element->obj_field_put(_annotations_offset, value);
5366 }
5367
5368 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5369 element->obj_field_put(_typeAnnotations_offset, value);
5370 }
5371
5372 // java_lang_InternalError
5373 int java_lang_InternalError::_during_unsafe_access_offset;
5374
5375 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5376 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5377 }
5378
5379 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5380 return internal_error->bool_field(_during_unsafe_access_offset);
5381 }
5382
5383 void java_lang_InternalError::compute_offsets() {
5384 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5385 }
5386
5387 #if INCLUDE_CDS
5388 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5389 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5390 }
5391 #endif
5392
5393 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5394 f(java_lang_Class) \
5395 f(java_lang_String) \
5396 f(java_lang_ref_Reference) \
5397 //end
5398
5399 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5400 f(java_lang_System) \
5401 f(java_lang_ClassLoader) \
5402 f(java_lang_Throwable) \
5403 f(java_lang_Thread) \
5404 f(java_lang_Thread_FieldHolder) \
5405 f(java_lang_Thread_Constants) \
5406 f(java_lang_ThreadGroup) \
5407 f(java_lang_VirtualThread) \
5408 f(java_lang_InternalError) \
5409 f(java_lang_AssertionStatusDirectives) \
5410 f(java_lang_ref_SoftReference) \
5411 f(java_lang_invoke_MethodHandle) \
5412 f(java_lang_invoke_DirectMethodHandle) \
5413 f(java_lang_invoke_MemberName) \
5414 f(java_lang_invoke_ResolvedMethodName) \
5415 f(java_lang_invoke_LambdaForm) \
5416 f(java_lang_invoke_MethodType) \
5417 f(java_lang_invoke_CallSite) \
5418 f(java_lang_invoke_ConstantCallSite) \
5419 f(java_lang_reflect_AccessibleObject) \
5420 f(java_lang_reflect_Method) \
5421 f(java_lang_reflect_Constructor) \
5422 f(java_lang_reflect_Field) \
5423 f(java_lang_reflect_RecordComponent) \
5424 f(reflect_ConstantPool) \
5425 f(java_lang_reflect_Parameter) \
5426 f(java_lang_Module) \
5427 f(java_lang_StackTraceElement) \
5428 f(java_lang_ClassFrameInfo) \
5429 f(java_lang_StackFrameInfo) \
5430 f(java_lang_LiveStackFrameInfo) \
5431 f(jdk_internal_vm_ContinuationScope) \
5432 f(jdk_internal_vm_Continuation) \
5433 f(jdk_internal_vm_StackChunk) \
5434 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5435 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5436 f(jdk_internal_foreign_abi_ABIDescriptor) \
5437 f(jdk_internal_foreign_abi_VMStorage) \
5438 f(jdk_internal_foreign_abi_CallConv) \
5439 f(jdk_internal_misc_UnsafeConstants) \
5440 f(java_lang_boxing_object) \
5441 f(vector_VectorPayload) \
5442 //end
5443
5444 #define BASIC_JAVA_CLASSES_DO(f) \
5445 BASIC_JAVA_CLASSES_DO_PART1(f) \
5446 BASIC_JAVA_CLASSES_DO_PART2(f)
5447
5448 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5449
5450 // Compute field offsets of all the classes in this file
5451 void JavaClasses::compute_offsets() {
5452 if (CDSConfig::is_using_archive()) {
5453 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5454 JvmtiExport::has_early_class_hook_env()),
5455 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5456 // None of the classes used by the rest of this function can be replaced by
5457 // JVMTI ClassFileLoadHook.
5458 // We are safe to use the archived offsets, which have already been restored
5459 // by JavaClasses::serialize_offsets, without computing the offsets again.
5460 return;
5461 }
5462
5463 // We have already called the compute_offsets() of the
5464 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5465 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5466 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5467 }
5468
5469 #if INCLUDE_CDS
5470 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5471
5472 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5473 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5474 }
5475 #endif
5476
5477 #if INCLUDE_CDS_JAVA_HEAP
5478 bool JavaClasses::is_supported_for_archiving(oop obj) {
5479 Klass* klass = obj->klass();
5480
5481 if (!CDSConfig::is_dumping_method_handles()) {
5482 // These are supported by CDS only when CDSConfig::is_dumping_method_handles() is enabled.
5483 if (klass == vmClasses::ResolvedMethodName_klass() ||
5484 klass == vmClasses::MemberName_klass()) {
5485 return false;
5486 }
5487 }
5488
5489 if (klass->is_subclass_of(vmClasses::Reference_klass())) {
5490 // It's problematic to archive Reference objects. One of the reasons is that
5491 // Reference::discovered may pull in unwanted objects (see JDK-8284336)
5492 return false;
5493 }
5494
5495 return true;
5496 }
5497 #endif
5498
5499 #ifndef PRODUCT
5500
5501 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5502
5503 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5504 const char* field_sig) {
5505 EXCEPTION_MARK;
5506 fieldDescriptor fd;
5507 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5508 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5509 InstanceKlass* ik = InstanceKlass::cast(k);
5510 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5511 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5512 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5513 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5514 return false;
5515 }
5516 if (fd.is_static()) {
5517 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5518 return false;
5519 }
5520 if (fd.offset() == deserialized_offset ) {
5521 return true;
5522 } else {
5523 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5524 klass_name, field_name, deserialized_offset, fd.offset());
5525 return false;
5526 }
5527 }
5528
5529 void JavaClasses::check_offsets() {
5530 bool valid = true;
5531
5532 #define CHECK_OFFSET(klass_name, type, field_sig) \
5533 valid &= check_offset(klass_name, java_lang_boxing_object::value_offset(type), "value", field_sig)
5534
5535 CHECK_OFFSET("java/lang/Boolean", T_BOOLEAN, "Z");
5536 CHECK_OFFSET("java/lang/Character", T_CHAR, "C");
5537 CHECK_OFFSET("java/lang/Float", T_FLOAT, "F");
5538 CHECK_OFFSET("java/lang/Double", T_DOUBLE, "D");
5539 CHECK_OFFSET("java/lang/Byte", T_BYTE, "B");
5540 CHECK_OFFSET("java/lang/Short", T_SHORT, "S");
5541 CHECK_OFFSET("java/lang/Integer", T_INT, "I");
5542 CHECK_OFFSET("java/lang/Long", T_LONG, "J");
5543
5544 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5545 }
5546
5547 #endif // PRODUCT
5548
5549 int InjectedField::compute_offset() {
5550 InstanceKlass* ik = InstanceKlass::cast(klass());
5551 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5552 if (!may_be_java && !fs.field_flags().is_injected()) {
5553 // Only look at injected fields
5554 continue;
5555 }
5556 if (fs.name() == name() && fs.signature() == signature()) {
5557 return fs.offset();
5558 }
5559 }
5560 ResourceMark rm;
5561 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)" : "");
5562 #ifndef PRODUCT
5563 ik->print();
5564 tty->print_cr("all fields:");
5565 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5566 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());
5567 }
5568 #endif //PRODUCT
5569 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5570 return -1;
5571 }
5572
5573 void javaClasses_init() {
5574 JavaClasses::compute_offsets();
5575 JavaClasses::check_offsets();
5576 FilteredFieldsMap::initialize(); // must be done after computing offsets.
5577 }