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