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