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