1 /*
2 * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "cds/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 // Set the raw access_flags, this is used by reflection instead of modifier flags.
1095 // The Java code for array classes gets the access flags from the element type.
1096 assert(!k->is_array_klass() || k->access_flags().as_unsigned_short() == 0, "access flags are not set for arrays");
1097 set_raw_access_flags(mirror(), k->access_flags().as_unsigned_short());
1098
1099 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
1100 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
1101
1102 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
1103
1104 // It might also have a component mirror. This mirror must already exist.
1105 if (k->is_array_klass()) {
1106 if (k->is_typeArray_klass()) {
1107 BasicType type = TypeArrayKlass::cast(k)->element_type();
1108 if (is_scratch) {
1109 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
1110 } else {
1111 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
1112 }
1113 } else {
1114 assert(k->is_objArray_klass(), "Must be");
1115 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1116 assert(element_klass != nullptr, "Must have an element klass");
1117 if (is_scratch) {
1118 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1119 } else {
1120 comp_mirror = Handle(THREAD, element_klass->java_mirror());
1121 }
1122 }
1123 assert(comp_mirror() != nullptr, "must have a mirror");
1124
1125 // Two-way link between the array klass and its component mirror:
1126 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1127 set_component_mirror(mirror(), comp_mirror());
1128 // See below for ordering dependencies between field array_klass in component mirror
1129 // and java_mirror in this klass.
1130 } else {
1131 assert(k->is_instance_klass(), "Must be");
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
1245 // create the init_lock
1246 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1247 set_init_lock(mirror(), r);
1248
1249 if (protection_domain.not_null()) {
1250 set_protection_domain(mirror(), protection_domain());
1251 }
1252 }
1253
1254 assert(class_loader() == k->class_loader(), "should be same");
1255 if (class_loader.not_null()) {
1256 set_class_loader(mirror(), class_loader());
1257 }
1258
1259 k->set_java_mirror(mirror);
1260
1261 set_mirror_module_field(THREAD, k, mirror, module);
1262
1263 if (log_is_enabled(Trace, aot, heap, mirror)) {
1264 ResourceMark rm(THREAD);
1265 log_trace(aot, heap, mirror)(
1266 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1267 }
1268
1269 return true;
1270 }
1271 #endif // INCLUDE_CDS_JAVA_HEAP
1272
1273 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1274 assert(_module_offset != 0, "must have been computed already");
1275 set_module(k->java_mirror(), module());
1276 }
1277
1278 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1279 assert(_oop_size_offset != 0, "must be set");
1280 assert(size > 0, "Oop size must be greater than zero, not %zu", size);
1281 assert(size <= INT_MAX, "Lossy conversion: %zu", size);
1282 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1283 }
1284
1285 int java_lang_Class::static_oop_field_count(oop java_class) {
1286 assert(_static_oop_field_count_offset != 0, "must be set");
1287 return java_class->int_field(_static_oop_field_count_offset);
1288 }
1289
1290 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1291 assert(_static_oop_field_count_offset != 0, "must be set");
1292 java_class->int_field_put(_static_oop_field_count_offset, size);
1293 }
1294
1295 oop java_lang_Class::protection_domain(oop java_class) {
1296 assert(_protection_domain_offset != 0, "must be set");
1297 return java_class->obj_field(_protection_domain_offset);
1298 }
1299 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1300 assert(_protection_domain_offset != 0, "must be set");
1301 java_class->obj_field_put(_protection_domain_offset, pd);
1302 }
1303
1304 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1305 assert(_component_mirror_offset != 0, "must be set");
1306 assert(java_lang_Class::as_Klass(java_class) != nullptr &&
1307 java_lang_Class::as_Klass(java_class)->is_array_klass(), "must be");
1308 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1309 }
1310
1311 oop java_lang_Class::component_mirror(oop java_class) {
1312 assert(_component_mirror_offset != 0, "must be set");
1313 return java_class->obj_field(_component_mirror_offset);
1314 }
1315
1316 oop java_lang_Class::init_lock(oop java_class) {
1317 assert(_init_lock_offset != 0, "must be set");
1318 return java_class->obj_field(_init_lock_offset);
1319 }
1320 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1321 assert(_init_lock_offset != 0, "must be set");
1322 java_class->obj_field_put(_init_lock_offset, init_lock);
1323 }
1324
1325 objArrayOop java_lang_Class::signers(oop java_class) {
1326 assert(_signers_offset != 0, "must be set");
1327 return (objArrayOop)java_class->obj_field(_signers_offset);
1328 }
1329
1330 oop java_lang_Class::class_data(oop java_class) {
1331 assert(_classData_offset != 0, "must be set");
1332 return java_class->obj_field(_classData_offset);
1333 }
1334 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1335 assert(_classData_offset != 0, "must be set");
1336 java_class->obj_field_put(_classData_offset, class_data);
1337 }
1338
1339 oop java_lang_Class::reflection_data(oop java_class) {
1340 assert(_reflectionData_offset != 0, "must be set");
1341 return java_class->obj_field(_reflectionData_offset);
1342 }
1343
1344 bool java_lang_Class::has_reflection_data(oop java_class) {
1345 return (java_lang_Class::reflection_data(java_class) != nullptr);
1346 }
1347
1348 void java_lang_Class::set_reflection_data(oop java_class, oop reflection_data) {
1349 assert(_reflectionData_offset != 0, "must be set");
1350 java_class->obj_field_put(_reflectionData_offset, reflection_data);
1351 }
1352
1353 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1354 assert(_class_loader_offset != 0, "offsets should have been initialized");
1355 java_class->obj_field_put(_class_loader_offset, loader);
1356 }
1357
1358 oop java_lang_Class::class_loader(oop java_class) {
1359 assert(_class_loader_offset != 0, "must be set");
1360 return java_class->obj_field(_class_loader_offset);
1361 }
1362
1363 oop java_lang_Class::module(oop java_class) {
1364 assert(_module_offset != 0, "must be set");
1365 return java_class->obj_field(_module_offset);
1366 }
1367
1368 void java_lang_Class::set_module(oop java_class, oop module) {
1369 assert(_module_offset != 0, "must be set");
1370 java_class->obj_field_put(_module_offset, module);
1371 }
1372
1373 oop java_lang_Class::name(Handle java_class, TRAPS) {
1374 assert(_name_offset != 0, "must be set");
1375 oop o = java_class->obj_field(_name_offset);
1376 if (o == nullptr) {
1377 o = StringTable::intern(as_external_name(java_class()), THREAD);
1378 java_class->obj_field_put(_name_offset, o);
1379 }
1380 return o;
1381 }
1382
1383 oop java_lang_Class::source_file(oop java_class) {
1384 assert(_source_file_offset != 0, "must be set");
1385 return java_class->obj_field(_source_file_offset);
1386 }
1387
1388 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1389 assert(_source_file_offset != 0, "must be set");
1390 java_class->obj_field_put(_source_file_offset, source_file);
1391 }
1392
1393 void java_lang_Class::set_is_primitive(oop java_class) {
1394 assert(_is_primitive_offset != 0, "must be set");
1395 java_class->bool_field_put(_is_primitive_offset, true);
1396 }
1397
1398
1399 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1400 // Mirrors for basic types have a null klass field, which makes them special.
1401 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1402 if (type != T_VOID) {
1403 Klass* aklass = Universe::typeArrayKlass(type);
1404 assert(aklass != nullptr, "correct bootstrap");
1405 release_set_array_klass(java_class, aklass);
1406 }
1407 #ifdef ASSERT
1408 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1409 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1410 #endif
1411 set_modifiers(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
1412 set_raw_access_flags(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
1413
1414 set_is_primitive(java_class);
1415 return java_class;
1416 }
1417
1418 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1419 assert(is_instance(java_class), "must be a Class object");
1420 java_class->metadata_field_put(_klass_offset, klass);
1421 }
1422
1423
1424 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1425 assert(is_instance(java_class), "must be a Class object");
1426 Symbol* name = nullptr;
1427 bool is_instance = false;
1428 if (is_primitive(java_class)) {
1429 name = vmSymbols::type_signature(primitive_type(java_class));
1430 } else {
1431 Klass* k = as_Klass(java_class);
1432 is_instance = k->is_instance_klass();
1433 name = k->name();
1434 }
1435 if (name == nullptr) {
1436 st->print("<null>");
1437 return;
1438 }
1439 if (is_instance) st->print("L");
1440 st->write((char*) name->base(), (int) name->utf8_length());
1441 if (is_instance) st->print(";");
1442 }
1443
1444 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1445 assert(is_instance(java_class), "must be a Class object");
1446 Symbol* name;
1447 if (is_primitive(java_class)) {
1448 name = vmSymbols::type_signature(primitive_type(java_class));
1449 // Because this can create a new symbol, the caller has to decrement
1450 // the refcount, so make adjustment here and below for symbols returned
1451 // that are not created or incremented due to a successful lookup.
1452 name->increment_refcount();
1453 } else {
1454 Klass* k = as_Klass(java_class);
1455 if (!k->is_instance_klass()) {
1456 name = k->name();
1457 name->increment_refcount();
1458 } else {
1459 ResourceMark rm;
1460 const char* sigstr = k->signature_name();
1461 int siglen = (int) strlen(sigstr);
1462 if (!intern_if_not_found) {
1463 name = SymbolTable::probe(sigstr, siglen);
1464 } else {
1465 name = SymbolTable::new_symbol(sigstr, siglen);
1466 }
1467 }
1468 }
1469 return name;
1470 }
1471
1472 // Returns the Java name for this Java mirror (Resource allocated)
1473 // See Klass::external_name().
1474 // For primitive type Java mirrors, its type name is returned.
1475 const char* java_lang_Class::as_external_name(oop java_class) {
1476 assert(is_instance(java_class), "must be a Class object");
1477 const char* name = nullptr;
1478 if (is_primitive(java_class)) {
1479 name = type2name(primitive_type(java_class));
1480 } else {
1481 name = as_Klass(java_class)->external_name();
1482 }
1483 if (name == nullptr) {
1484 name = "<null>";
1485 }
1486 return name;
1487 }
1488
1489 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1490 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1491 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass");
1492 return k;
1493 }
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 int java_lang_Class::raw_access_flags(oop the_class_mirror) {
1602 assert(_raw_access_flags_offset != 0, "offsets should have been initialized");
1603 return the_class_mirror->char_field(_raw_access_flags_offset);
1604 }
1605
1606 void java_lang_Class::set_raw_access_flags(oop the_class_mirror, u2 value) {
1607 assert(_raw_access_flags_offset != 0, "offsets should have been initialized");
1608 the_class_mirror->char_field_put(_raw_access_flags_offset, value);
1609 }
1610
1611
1612 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1613 // platform thread structure, and a eetop offset which was used for thread
1614 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1615 // merged, so in the HotSpot VM we just use the eetop field for the thread
1616 // instead of the privateInfo_offset.
1617 //
1618 // Note: The stackSize field is only present starting in 1.4.
1619
1620 int java_lang_Thread_FieldHolder::_group_offset;
1621 int java_lang_Thread_FieldHolder::_priority_offset;
1622 int java_lang_Thread_FieldHolder::_stackSize_offset;
1623 int java_lang_Thread_FieldHolder::_daemon_offset;
1624 int java_lang_Thread_FieldHolder::_thread_status_offset;
1625
1626 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1627 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1628 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1629 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1630 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1631 macro(_thread_status_offset, k, "threadStatus", int_signature, false)
1632
1633 void java_lang_Thread_FieldHolder::compute_offsets() {
1634 assert(_group_offset == 0, "offsets should be initialized only once");
1635
1636 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1637 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1638 }
1639
1640 #if INCLUDE_CDS
1641 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1642 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1643 }
1644 #endif
1645
1646 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1647 return holder->obj_field(_group_offset);
1648 }
1649
1650 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1651 return (ThreadPriority)holder->int_field(_priority_offset);
1652 }
1653
1654 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1655 holder->int_field_put(_priority_offset, priority);
1656 }
1657
1658 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1659 return holder->long_field(_stackSize_offset);
1660 }
1661
1662 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1663 return holder->bool_field(_daemon_offset) != 0;
1664 }
1665
1666 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1667 assert(val, "daemon status is never turned off");
1668 holder->bool_field_put(_daemon_offset, val);
1669 }
1670
1671 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1672 holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1673 }
1674
1675 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1676 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1677 }
1678
1679
1680 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1681
1682 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1683 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true);
1684
1685 void java_lang_Thread_Constants::compute_offsets() {
1686 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1687
1688 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1689 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1690 }
1691
1692 #if INCLUDE_CDS
1693 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1694 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1695 }
1696 #endif
1697
1698 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1699 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1700 oop base = k->static_field_base_raw();
1701 return base->obj_field(_static_VTHREAD_GROUP_offset);
1702 }
1703
1704
1705 int java_lang_Thread::_holder_offset;
1706 int java_lang_Thread::_name_offset;
1707 int java_lang_Thread::_contextClassLoader_offset;
1708 int java_lang_Thread::_eetop_offset;
1709 int java_lang_Thread::_jvmti_thread_state_offset;
1710 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1711 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1712 int java_lang_Thread::_interrupted_offset;
1713 int java_lang_Thread::_interruptLock_offset;
1714 int java_lang_Thread::_tid_offset;
1715 int java_lang_Thread::_continuation_offset;
1716 int java_lang_Thread::_park_blocker_offset;
1717 int java_lang_Thread::_scopedValueBindings_offset;
1718 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1719
1720 #define THREAD_FIELDS_DO(macro) \
1721 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \
1722 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1723 macro(_contextClassLoader_offset, k, "contextClassLoader", classloader_signature, false); \
1724 macro(_eetop_offset, k, "eetop", long_signature, false); \
1725 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1726 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \
1727 macro(_tid_offset, k, "tid", long_signature, false); \
1728 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1729 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1730 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1731
1732 void java_lang_Thread::compute_offsets() {
1733 assert(_holder_offset == 0, "offsets should be initialized only once");
1734
1735 InstanceKlass* k = vmClasses::Thread_klass();
1736 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1737 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1738 }
1739
1740 #if INCLUDE_CDS
1741 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1742 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1743 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1744 }
1745 #endif
1746
1747 JavaThread* java_lang_Thread::thread(oop java_thread) {
1748 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1749 }
1750
1751 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1752 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1753 }
1754
1755 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1756 java_thread->address_field_put(_eetop_offset, (address)thread);
1757 }
1758
1759 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1760 java_thread->release_address_field_put(_eetop_offset, (address)thread);
1761 }
1762
1763 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1764 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1765 }
1766
1767 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1768 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1769 }
1770
1771 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1772 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1773 }
1774
1775 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1776 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1777 int val = VTMS_transition_disable_count(java_thread);
1778 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1779 }
1780
1781 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1782 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1783 int val = VTMS_transition_disable_count(java_thread);
1784 assert(val > 0, "VTMS_transition_disable_count should never be negative");
1785 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1786 }
1787
1788 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1789 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1790 }
1791
1792 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1793 assert(is_in_VTMS_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside");
1794 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1795 }
1796
1797 int java_lang_Thread::is_in_VTMS_transition_offset() {
1798 return _jvmti_is_in_VTMS_transition_offset;
1799 }
1800
1801 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1802 assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1803 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1804 }
1805
1806 oop java_lang_Thread::holder(oop java_thread) {
1807 // Note: may return null if the thread is still attaching
1808 return java_thread->obj_field(_holder_offset);
1809 }
1810 oop java_lang_Thread::interrupt_lock(oop java_thread) {
1811 return java_thread->obj_field(_interruptLock_offset);
1812 }
1813
1814 bool java_lang_Thread::interrupted(oop java_thread) {
1815 // Make sure the caller can safely access oops.
1816 assert(Thread::current()->is_VM_thread() ||
1817 (JavaThread::current()->thread_state() != _thread_blocked &&
1818 JavaThread::current()->thread_state() != _thread_in_native),
1819 "Unsafe access to oop");
1820 return java_thread->bool_field_volatile(_interrupted_offset);
1821 }
1822
1823 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1824 // Make sure the caller can safely access oops.
1825 assert(Thread::current()->is_VM_thread() ||
1826 (JavaThread::current()->thread_state() != _thread_blocked &&
1827 JavaThread::current()->thread_state() != _thread_in_native),
1828 "Unsafe access to oop");
1829 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1830 }
1831
1832
1833 oop java_lang_Thread::name(oop java_thread) {
1834 return java_thread->obj_field(_name_offset);
1835 }
1836
1837
1838 void java_lang_Thread::set_name(oop java_thread, oop name) {
1839 java_thread->obj_field_put(_name_offset, name);
1840 }
1841
1842 // Convenience macros for setting and getting Thread fields that
1843 // are actually stored in the FieldHolder object of the thread.
1844 // The FieldHolder can be null whilst a thread is attaching via
1845 // JNI, and when the main thread is attaching.
1846
1847 // The default value should be the default/zero initialized value
1848 // of the field as it would be in java.lang.Thread.FieldHolder.
1849 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \
1850 { \
1851 oop holder = java_lang_Thread::holder(java_thread); \
1852 if (holder != nullptr) \
1853 return java_lang_Thread_FieldHolder::field(holder); \
1854 else \
1855 return default_val; \
1856 }
1857
1858 // We should never be trying to set a field of an attaching thread.
1859 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \
1860 { \
1861 oop holder = java_lang_Thread::holder(java_thread); \
1862 assert(holder != nullptr, "Thread not fully initialized"); \
1863 java_lang_Thread_FieldHolder::set_##field(holder, value); \
1864 }
1865
1866
1867 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1868 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1869 }
1870
1871
1872 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1873 SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1874 }
1875
1876
1877 oop java_lang_Thread::threadGroup(oop java_thread) {
1878 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1879 }
1880
1881
1882 bool java_lang_Thread::is_alive(oop java_thread) {
1883 JavaThread* thr = java_lang_Thread::thread(java_thread);
1884 return (thr != nullptr);
1885 }
1886
1887
1888 bool java_lang_Thread::is_daemon(oop java_thread) {
1889 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1890 }
1891
1892
1893 void java_lang_Thread::set_daemon(oop java_thread) {
1894 SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1895 }
1896
1897 oop java_lang_Thread::context_class_loader(oop java_thread) {
1898 return java_thread->obj_field(_contextClassLoader_offset);
1899 }
1900
1901
1902 jlong java_lang_Thread::stackSize(oop java_thread) {
1903 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1904 }
1905
1906 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1907 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1908 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1909 }
1910
1911 // Read thread status value from threadStatus field in java.lang.Thread java class.
1912 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1913 // Make sure the caller is operating on behalf of the VM or is
1914 // running VM code (state == _thread_in_vm).
1915 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1916 JavaThread::current()->thread_state() == _thread_in_vm ||
1917 JavaThread::current() == java_lang_Thread::thread(java_thread),
1918 "unsafe call to java_lang_Thread::get_thread_status()?");
1919 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1920 }
1921
1922 ByteSize java_lang_Thread::thread_id_offset() {
1923 return in_ByteSize(_tid_offset);
1924 }
1925
1926 oop java_lang_Thread::park_blocker(oop java_thread) {
1927 return java_thread->obj_field_access<MO_RELAXED>(_park_blocker_offset);
1928 }
1929
1930 // Obtain stack trace for platform or mounted virtual thread.
1931 // If jthread is a virtual thread and it has been unmounted (or remounted to different carrier) the method returns null.
1932 // The caller (java.lang.VirtualThread) handles returned nulls via retry.
1933 oop java_lang_Thread::async_get_stack_trace(jobject jthread, TRAPS) {
1934 ThreadsListHandle tlh(THREAD);
1935 JavaThread* java_thread = nullptr;
1936 oop thread_oop;
1937
1938 bool has_java_thread = tlh.cv_internal_thread_to_JavaThread(jthread, &java_thread, &thread_oop);
1939 if (!has_java_thread) {
1940 return nullptr;
1941 }
1942
1943 class GetStackTraceHandshakeClosure : public HandshakeClosure {
1944 public:
1945 const Handle _thread_h;
1946 int _depth;
1947 bool _retry_handshake;
1948 GrowableArray<Method*>* _methods;
1949 GrowableArray<int>* _bcis;
1950
1951 GetStackTraceHandshakeClosure(Handle thread_h) :
1952 HandshakeClosure("GetStackTraceHandshakeClosure"), _thread_h(thread_h), _depth(0), _retry_handshake(false),
1953 _methods(nullptr), _bcis(nullptr) {
1954 }
1955 ~GetStackTraceHandshakeClosure() {
1956 delete _methods;
1957 delete _bcis;
1958 }
1959
1960 bool read_reset_retry() {
1961 bool ret = _retry_handshake;
1962 // If we re-execute the handshake this method need to return false
1963 // when the handshake cannot be performed. (E.g. thread terminating)
1964 _retry_handshake = false;
1965 return ret;
1966 }
1967
1968 void do_thread(Thread* th) {
1969 if (!Thread::current()->is_Java_thread()) {
1970 _retry_handshake = true;
1971 return;
1972 }
1973
1974 JavaThread* java_thread = JavaThread::cast(th);
1975
1976 if (!java_thread->has_last_Java_frame()) {
1977 return;
1978 }
1979
1980 bool carrier = false;
1981 if (java_lang_VirtualThread::is_instance(_thread_h())) {
1982 // Ensure _thread_h is still mounted to java_thread.
1983 const ContinuationEntry* ce = java_thread->vthread_continuation();
1984 if (ce == nullptr || ce->cont_oop(java_thread) != java_lang_VirtualThread::continuation(_thread_h())) {
1985 // Target thread has been unmounted.
1986 return;
1987 }
1988 } else {
1989 carrier = (java_thread->vthread_continuation() != nullptr);
1990 }
1991
1992 const int max_depth = MaxJavaStackTraceDepth;
1993 const bool skip_hidden = !ShowHiddenFrames;
1994
1995 // Pick minimum length that will cover most cases
1996 int init_length = 64;
1997 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1998 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
1999
2000 int total_count = 0;
2001 for (vframeStream vfst(java_thread, false, false, carrier); // we don't process frames as we don't care about oops
2002 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
2003 vfst.next()) {
2004
2005 if (skip_hidden && (vfst.method()->is_hidden() ||
2006 vfst.method()->is_continuation_enter_intrinsic())) {
2007 continue;
2008 }
2009
2010 _methods->push(vfst.method());
2011 _bcis->push(vfst.bci());
2012 total_count++;
2013 }
2014
2015 _depth = total_count;
2016 }
2017 };
2018
2019 // Handshake with target
2020 ResourceMark rm(THREAD);
2021 HandleMark hm(THREAD);
2022 GetStackTraceHandshakeClosure gsthc(Handle(THREAD, thread_oop));
2023 do {
2024 Handshake::execute(&gsthc, &tlh, java_thread);
2025 } while (gsthc.read_reset_retry());
2026
2027 // Stop if no stack trace is found.
2028 if (gsthc._depth == 0) {
2029 return nullptr;
2030 }
2031
2032 // Convert to StackTraceElement array
2033 InstanceKlass* k = vmClasses::StackTraceElement_klass();
2034 assert(k != nullptr, "must be loaded in 1.4+");
2035 if (k->should_be_initialized()) {
2036 k->initialize(CHECK_NULL);
2037 }
2038 objArrayHandle trace = oopFactory::new_objArray_handle(k, gsthc._depth, CHECK_NULL);
2039
2040 for (int i = 0; i < gsthc._depth; i++) {
2041 methodHandle method(THREAD, gsthc._methods->at(i));
2042 oop element = java_lang_StackTraceElement::create(method,
2043 gsthc._bcis->at(i),
2044 CHECK_NULL);
2045 trace->obj_at_put(i, element);
2046 }
2047
2048 return trace();
2049 }
2050
2051 const char* java_lang_Thread::thread_status_name(oop java_thread) {
2052 JavaThreadStatus status = get_thread_status(java_thread);
2053 switch (status) {
2054 case JavaThreadStatus::NEW : return "NEW";
2055 case JavaThreadStatus::RUNNABLE : return "RUNNABLE";
2056 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)";
2057 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)";
2058 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
2059 case JavaThreadStatus::PARKED : return "WAITING (parking)";
2060 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)";
2061 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
2062 case JavaThreadStatus::TERMINATED : return "TERMINATED";
2063 default : return "UNKNOWN";
2064 };
2065 }
2066 int java_lang_ThreadGroup::_parent_offset;
2067 int java_lang_ThreadGroup::_name_offset;
2068 int java_lang_ThreadGroup::_maxPriority_offset;
2069 int java_lang_ThreadGroup::_daemon_offset;
2070
2071 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
2072 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2073 return java_thread_group->obj_field(_parent_offset);
2074 }
2075
2076 // ("name as oop" accessor is not necessary)
2077
2078 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
2079 oop name = java_thread_group->obj_field(_name_offset);
2080 // ThreadGroup.name can be null
2081 if (name != nullptr) {
2082 return java_lang_String::as_utf8_string(name);
2083 }
2084 return nullptr;
2085 }
2086
2087 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
2088 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2089 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
2090 }
2091
2092 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
2093 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2094 return java_thread_group->bool_field(_daemon_offset) != 0;
2095 }
2096
2097 #define THREADGROUP_FIELDS_DO(macro) \
2098 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
2099 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
2100 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
2101 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false);
2102
2103 void java_lang_ThreadGroup::compute_offsets() {
2104 assert(_parent_offset == 0, "offsets should be initialized only once");
2105
2106 InstanceKlass* k = vmClasses::ThreadGroup_klass();
2107 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2108 }
2109
2110 #if INCLUDE_CDS
2111 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
2112 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2113 }
2114 #endif
2115
2116
2117 // java_lang_VirtualThread
2118
2119 int java_lang_VirtualThread::static_vthread_scope_offset;
2120 int java_lang_VirtualThread::_carrierThread_offset;
2121 int java_lang_VirtualThread::_continuation_offset;
2122 int java_lang_VirtualThread::_state_offset;
2123 int java_lang_VirtualThread::_next_offset;
2124 int java_lang_VirtualThread::_onWaitingList_offset;
2125 int java_lang_VirtualThread::_notified_offset;
2126 int java_lang_VirtualThread::_interruptible_wait_offset;
2127 int java_lang_VirtualThread::_timeout_offset;
2128 int java_lang_VirtualThread::_objectWaiter_offset;
2129
2130 #define VTHREAD_FIELDS_DO(macro) \
2131 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \
2132 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \
2133 macro(_continuation_offset, k, "cont", continuation_signature, false); \
2134 macro(_state_offset, k, "state", int_signature, false); \
2135 macro(_next_offset, k, "next", vthread_signature, false); \
2136 macro(_onWaitingList_offset, k, "onWaitingList", bool_signature, false); \
2137 macro(_notified_offset, k, "notified", bool_signature, false); \
2138 macro(_interruptible_wait_offset, k, "interruptibleWait", bool_signature, false); \
2139 macro(_timeout_offset, k, "timeout", long_signature, false);
2140
2141
2142 void java_lang_VirtualThread::compute_offsets() {
2143 InstanceKlass* k = vmClasses::VirtualThread_klass();
2144 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2145 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2146 }
2147
2148 bool java_lang_VirtualThread::is_instance(oop obj) {
2149 return obj != nullptr && is_subclass(obj->klass());
2150 }
2151
2152 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
2153 oop thread = vthread->obj_field(_carrierThread_offset);
2154 return thread;
2155 }
2156
2157 oop java_lang_VirtualThread::continuation(oop vthread) {
2158 oop cont = vthread->obj_field(_continuation_offset);
2159 return cont;
2160 }
2161
2162 int java_lang_VirtualThread::state(oop vthread) {
2163 return vthread->int_field_acquire(_state_offset);
2164 }
2165
2166 void java_lang_VirtualThread::set_state(oop vthread, int state) {
2167 vthread->release_int_field_put(_state_offset, state);
2168 }
2169
2170 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) {
2171 jint* addr = vthread->field_addr<jint>(_state_offset);
2172 int res = AtomicAccess::cmpxchg(addr, old_state, new_state);
2173 return res;
2174 }
2175
2176 oop java_lang_VirtualThread::next(oop vthread) {
2177 return vthread->obj_field(_next_offset);
2178 }
2179
2180 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) {
2181 vthread->obj_field_put(_next_offset, next_vthread);
2182 }
2183
2184 // Add vthread to the waiting list if it's not already in it. Multiple threads
2185 // could be trying to add vthread to the list at the same time, so we control
2186 // access with a cmpxchg on onWaitingList. The winner adds vthread to the list.
2187 // Method returns true if we added vthread to the list, false otherwise.
2188 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) {
2189 jboolean* addr = vthread->field_addr<jboolean>(_onWaitingList_offset);
2190 jboolean vthread_on_list = AtomicAccess::load(addr);
2191 if (!vthread_on_list) {
2192 vthread_on_list = AtomicAccess::cmpxchg(addr, (jboolean)JNI_FALSE, (jboolean)JNI_TRUE);
2193 if (!vthread_on_list) {
2194 for (;;) {
2195 oop head = list_head.resolve();
2196 java_lang_VirtualThread::set_next(vthread, head);
2197 if (list_head.cmpxchg(head, vthread) == head) return true;
2198 }
2199 }
2200 }
2201 return false; // already on waiting list
2202 }
2203
2204 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) {
2205 vthread->bool_field_put_volatile(_notified_offset, value);
2206 }
2207
2208 void java_lang_VirtualThread::set_interruptible_wait(oop vthread, jboolean value) {
2209 vthread->bool_field_put_volatile(_interruptible_wait_offset, value);
2210 }
2211
2212 jlong java_lang_VirtualThread::timeout(oop vthread) {
2213 return vthread->long_field(_timeout_offset);
2214 }
2215
2216 void java_lang_VirtualThread::set_timeout(oop vthread, jlong value) {
2217 vthread->long_field_put(_timeout_offset, value);
2218 }
2219
2220 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2221 JavaThreadStatus status = JavaThreadStatus::NEW;
2222 switch (state & ~SUSPENDED) {
2223 case NEW:
2224 status = JavaThreadStatus::NEW;
2225 break;
2226 case STARTED:
2227 case RUNNING:
2228 case PARKING:
2229 case TIMED_PARKING:
2230 case UNPARKED:
2231 case YIELDING:
2232 case YIELDED:
2233 case UNBLOCKED:
2234 case WAITING:
2235 case TIMED_WAITING:
2236 status = JavaThreadStatus::RUNNABLE;
2237 break;
2238 case PARKED:
2239 case PINNED:
2240 status = JavaThreadStatus::PARKED;
2241 break;
2242 case TIMED_PARKED:
2243 case TIMED_PINNED:
2244 status = JavaThreadStatus::PARKED_TIMED;
2245 break;
2246 case BLOCKING:
2247 case BLOCKED:
2248 status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER;
2249 break;
2250 case WAIT:
2251 status = JavaThreadStatus::IN_OBJECT_WAIT;
2252 break;
2253 case TIMED_WAIT:
2254 status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED;
2255 break;
2256 case TERMINATED:
2257 status = JavaThreadStatus::TERMINATED;
2258 break;
2259 default:
2260 ShouldNotReachHere();
2261 }
2262 return status;
2263 }
2264
2265 ObjectMonitor* java_lang_VirtualThread::current_pending_monitor(oop vthread) {
2266 ObjectWaiter* waiter = objectWaiter(vthread);
2267 if (waiter != nullptr && waiter->at_monitorenter()) {
2268 return waiter->monitor();
2269 }
2270 return nullptr;
2271 }
2272
2273 ObjectMonitor* java_lang_VirtualThread::current_waiting_monitor(oop vthread) {
2274 ObjectWaiter* waiter = objectWaiter(vthread);
2275 if (waiter != nullptr && waiter->is_wait()) {
2276 return waiter->monitor();
2277 }
2278 return nullptr;
2279 }
2280
2281 bool java_lang_VirtualThread::is_preempted(oop vthread) {
2282 oop continuation = java_lang_VirtualThread::continuation(vthread);
2283 assert(continuation != nullptr, "vthread with no continuation");
2284 stackChunkOop chunk = jdk_internal_vm_Continuation::tail(continuation);
2285 return chunk != nullptr && chunk->preempted();
2286 }
2287
2288 #if INCLUDE_CDS
2289 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2290 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2291 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2292 }
2293 #endif
2294
2295 // java_lang_Throwable
2296
2297 int java_lang_Throwable::_backtrace_offset;
2298 int java_lang_Throwable::_detailMessage_offset;
2299 int java_lang_Throwable::_stackTrace_offset;
2300 int java_lang_Throwable::_depth_offset;
2301 int java_lang_Throwable::_cause_offset;
2302 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2303
2304 #define THROWABLE_FIELDS_DO(macro) \
2305 macro(_backtrace_offset, k, "backtrace", object_signature, false); \
2306 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \
2307 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2308 macro(_depth_offset, k, "depth", int_signature, false); \
2309 macro(_cause_offset, k, "cause", throwable_signature, false); \
2310 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2311
2312 void java_lang_Throwable::compute_offsets() {
2313 InstanceKlass* k = vmClasses::Throwable_klass();
2314 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2315 }
2316
2317 #if INCLUDE_CDS
2318 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2319 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2320 }
2321 #endif
2322
2323 oop java_lang_Throwable::unassigned_stacktrace() {
2324 InstanceKlass* ik = vmClasses::Throwable_klass();
2325 oop base = ik->static_field_base_raw();
2326 return base->obj_field(_static_unassigned_stacktrace_offset);
2327 }
2328
2329 oop java_lang_Throwable::backtrace(oop throwable) {
2330 return throwable->obj_field_acquire(_backtrace_offset);
2331 }
2332
2333
2334 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2335 throwable->release_obj_field_put(_backtrace_offset, value);
2336 }
2337
2338 int java_lang_Throwable::depth(oop throwable) {
2339 return throwable->int_field(_depth_offset);
2340 }
2341
2342 void java_lang_Throwable::set_depth(oop throwable, int value) {
2343 throwable->int_field_put(_depth_offset, value);
2344 }
2345
2346 oop java_lang_Throwable::message(oop throwable) {
2347 return throwable->obj_field(_detailMessage_offset);
2348 }
2349
2350 const char* java_lang_Throwable::message_as_utf8(oop throwable) {
2351 oop msg = java_lang_Throwable::message(throwable);
2352 const char* msg_utf8 = nullptr;
2353 if (msg != nullptr) {
2354 msg_utf8 = java_lang_String::as_utf8_string(msg);
2355 }
2356 return msg_utf8;
2357 }
2358
2359 oop java_lang_Throwable::cause(oop throwable) {
2360 return throwable->obj_field(_cause_offset);
2361 }
2362
2363 void java_lang_Throwable::set_message(oop throwable, oop value) {
2364 throwable->obj_field_put(_detailMessage_offset, value);
2365 }
2366
2367
2368 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2369 throwable->obj_field_put(_stackTrace_offset, st_element_array);
2370 }
2371
2372 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2373 set_stacktrace(throwable, nullptr);
2374 }
2375
2376 oop java_lang_Throwable::create_exception_instance(Symbol* class_name, TRAPS) {
2377 Klass* k = SystemDictionary::resolve_or_fail(class_name, true, CHECK_NULL);
2378 return InstanceKlass::cast(k)->allocate_instance(CHECK_NULL);
2379 }
2380
2381 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2382 ResourceMark rm;
2383 Klass* k = throwable->klass();
2384 assert(k != nullptr, "just checking");
2385 st->print("%s", k->external_name());
2386 oop msg = message(throwable);
2387 if (msg != nullptr) {
2388 st->print(": %s", java_lang_String::as_utf8_string(msg));
2389 }
2390 }
2391
2392 // After this many redefines, the stack trace is unreliable.
2393 const int MAX_VERSION = USHRT_MAX;
2394
2395 static inline bool version_matches(Method* method, int version) {
2396 assert(version < MAX_VERSION, "version is too big");
2397 return method != nullptr && (method->constants()->version() == version);
2398 }
2399
2400 // This class provides a simple wrapper over the internal structure of
2401 // exception backtrace to insulate users of the backtrace from needing
2402 // to know what it looks like.
2403 // The code of this class is not GC safe. Allocations can only happen
2404 // in expand().
2405 class BacktraceBuilder: public StackObj {
2406 friend class BacktraceIterator;
2407 private:
2408 Handle _backtrace;
2409 objArrayOop _head;
2410 typeArrayOop _methods;
2411 typeArrayOop _bcis;
2412 objArrayOop _mirrors;
2413 typeArrayOop _names; // Needed to insulate method name against redefinition.
2414 // True if the top frame of the backtrace is omitted because it shall be hidden.
2415 bool _has_hidden_top_frame;
2416 int _index;
2417 NoSafepointVerifier _nsv;
2418
2419 enum {
2420 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2421 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2422 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2423 trace_names_offset = java_lang_Throwable::trace_names_offset,
2424 trace_conts_offset = java_lang_Throwable::trace_conts_offset,
2425 trace_next_offset = java_lang_Throwable::trace_next_offset,
2426 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2427 trace_size = java_lang_Throwable::trace_size,
2428 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2429 };
2430
2431 // get info out of chunks
2432 static typeArrayOop get_methods(objArrayHandle chunk) {
2433 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2434 assert(methods != nullptr, "method array should be initialized in backtrace");
2435 return methods;
2436 }
2437 static typeArrayOop get_bcis(objArrayHandle chunk) {
2438 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2439 assert(bcis != nullptr, "bci array should be initialized in backtrace");
2440 return bcis;
2441 }
2442 static objArrayOop get_mirrors(objArrayHandle chunk) {
2443 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2444 assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2445 return mirrors;
2446 }
2447 static typeArrayOop get_names(objArrayHandle chunk) {
2448 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2449 assert(names != nullptr, "names array should be initialized in backtrace");
2450 return names;
2451 }
2452 static bool has_hidden_top_frame(objArrayHandle chunk) {
2453 oop hidden = chunk->obj_at(trace_hidden_offset);
2454 return hidden != nullptr;
2455 }
2456
2457 public:
2458
2459 // constructor for new backtrace
2460 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2461 expand(CHECK);
2462 _backtrace = Handle(THREAD, _head);
2463 _index = 0;
2464 }
2465
2466 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2467 _methods = get_methods(backtrace);
2468 _bcis = get_bcis(backtrace);
2469 _mirrors = get_mirrors(backtrace);
2470 _names = get_names(backtrace);
2471 _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2472 assert(_methods->length() == _bcis->length() &&
2473 _methods->length() == _mirrors->length() &&
2474 _mirrors->length() == _names->length(),
2475 "method and source information arrays should match");
2476
2477 // head is the preallocated backtrace
2478 _head = backtrace();
2479 _backtrace = Handle(thread, _head);
2480 _index = 0;
2481 }
2482
2483 void expand(TRAPS) {
2484 objArrayHandle old_head(THREAD, _head);
2485 PauseNoSafepointVerifier pnsv(&_nsv);
2486
2487 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2488 objArrayHandle new_head(THREAD, head);
2489
2490 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2491 typeArrayHandle new_methods(THREAD, methods);
2492
2493 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2494 typeArrayHandle new_bcis(THREAD, bcis);
2495
2496 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2497 objArrayHandle new_mirrors(THREAD, mirrors);
2498
2499 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2500 typeArrayHandle new_names(THREAD, names);
2501
2502 if (!old_head.is_null()) {
2503 old_head->obj_at_put(trace_next_offset, new_head());
2504 }
2505 new_head->obj_at_put(trace_methods_offset, new_methods());
2506 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2507 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2508 new_head->obj_at_put(trace_names_offset, new_names());
2509 new_head->obj_at_put(trace_hidden_offset, nullptr);
2510
2511 _head = new_head();
2512 _methods = new_methods();
2513 _bcis = new_bcis();
2514 _mirrors = new_mirrors();
2515 _names = new_names();
2516 _index = 0;
2517 }
2518
2519 oop backtrace() {
2520 return _backtrace();
2521 }
2522
2523 inline void push(Method* method, int bci, TRAPS) {
2524 // Smear the -1 bci to 0 since the array only holds unsigned
2525 // shorts. The later line number lookup would just smear the -1
2526 // to a 0 even if it could be recorded.
2527 if (bci == SynchronizationEntryBCI) bci = 0;
2528
2529 if (_index >= trace_chunk_size) {
2530 methodHandle mhandle(THREAD, method);
2531 expand(CHECK);
2532 method = mhandle();
2533 }
2534
2535 _methods->ushort_at_put(_index, method->orig_method_idnum());
2536 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2537
2538 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2539 // klass owning the symbols alive so their refcounts aren't decremented.
2540 Symbol* name = method->name();
2541 _names->symbol_at_put(_index, name);
2542
2543 // We need to save the mirrors in the backtrace to keep the class
2544 // from being unloaded while we still have this stack trace.
2545 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2546 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2547
2548 _index++;
2549 }
2550
2551 void set_has_hidden_top_frame() {
2552 if (!_has_hidden_top_frame) {
2553 // It would be nice to add java/lang/Boolean::TRUE here
2554 // to indicate that this backtrace has a hidden top frame.
2555 // But this code is used before TRUE is allocated.
2556 // Therefore let's just use an arbitrary legal oop
2557 // available right here. _methods is a short[].
2558 assert(_methods != nullptr, "we need a legal oop");
2559 _has_hidden_top_frame = true;
2560 _head->obj_at_put(trace_hidden_offset, _methods);
2561 }
2562 }
2563 };
2564
2565 struct BacktraceElement : public StackObj {
2566 int _method_id;
2567 int _bci;
2568 int _version;
2569 Symbol* _name;
2570 Handle _mirror;
2571 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2572 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2573 };
2574
2575 class BacktraceIterator : public StackObj {
2576 int _index;
2577 objArrayHandle _result;
2578 objArrayHandle _mirrors;
2579 typeArrayHandle _methods;
2580 typeArrayHandle _bcis;
2581 typeArrayHandle _names;
2582
2583 void init(objArrayHandle result, Thread* thread) {
2584 // Get method id, bci, version and mirror from chunk
2585 _result = result;
2586 if (_result.not_null()) {
2587 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2588 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2589 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2590 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2591 _index = 0;
2592 }
2593 }
2594 public:
2595 BacktraceIterator(objArrayHandle result, Thread* thread) {
2596 init(result, thread);
2597 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2598 }
2599
2600 BacktraceElement next(Thread* thread) {
2601 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2602 _methods->ushort_at(_index),
2603 Backtrace::version_at(_bcis->int_at(_index)),
2604 Backtrace::bci_at(_bcis->int_at(_index)),
2605 _names->symbol_at(_index));
2606 _index++;
2607
2608 if (_index >= java_lang_Throwable::trace_chunk_size) {
2609 int next_offset = java_lang_Throwable::trace_next_offset;
2610 // Get next chunk
2611 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2612 init(result, thread);
2613 }
2614 return e;
2615 }
2616
2617 bool repeat() {
2618 return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2619 }
2620 };
2621
2622
2623 // Print stack trace element to the specified output stream.
2624 // The output is formatted into a stringStream and written to the outputStream in one step.
2625 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2626 int version, int bci, Symbol* name) {
2627 ResourceMark rm;
2628 stringStream ss;
2629
2630 InstanceKlass* holder = java_lang_Class::as_InstanceKlass(mirror());
2631 const char* klass_name = holder->external_name();
2632 char* method_name = name->as_C_string();
2633 ss.print("\tat %s.%s(", klass_name, method_name);
2634
2635 // Print module information
2636 ModuleEntry* module = holder->module();
2637 if (module->is_named()) {
2638 char* module_name = module->name()->as_C_string();
2639 if (module->version() != nullptr) {
2640 char* module_version = module->version()->as_C_string();
2641 ss.print("%s@%s/", module_name, module_version);
2642 } else {
2643 ss.print("%s/", module_name);
2644 }
2645 }
2646
2647 char* source_file_name = nullptr;
2648 Symbol* source = Backtrace::get_source_file_name(holder, version);
2649 if (source != nullptr) {
2650 source_file_name = source->as_C_string();
2651 }
2652
2653 // The method can be null if the requested class version is gone
2654 Method* method = holder->method_with_orig_idnum(method_id, version);
2655 if (!version_matches(method, version)) {
2656 ss.print("Redefined)");
2657 } else {
2658 int line_number = Backtrace::get_line_number(method, bci);
2659 if (line_number == -2) {
2660 ss.print("Native Method)");
2661 } else {
2662 if (source_file_name != nullptr && (line_number != -1)) {
2663 // Sourcename and linenumber
2664 ss.print("%s:%d)", source_file_name, line_number);
2665 } else if (source_file_name != nullptr) {
2666 // Just sourcename
2667 ss.print("%s)", source_file_name);
2668 } else {
2669 // Neither sourcename nor linenumber
2670 ss.print("Unknown Source)");
2671 }
2672 nmethod* nm = method->code();
2673 if (WizardMode && nm != nullptr) {
2674 ss.print("(nmethod " INTPTR_FORMAT ")", p2i(nm));
2675 }
2676 }
2677 }
2678
2679 ss.cr();
2680 st->print_raw(ss.freeze(), ss.size());
2681 }
2682
2683 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2684 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2685 int method_id = method->orig_method_idnum();
2686 int version = method->constants()->version();
2687 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2688 }
2689
2690 /**
2691 * Print the throwable message and its stack trace plus all causes by walking the
2692 * cause chain. The output looks the same as of Throwable.printStackTrace().
2693 */
2694 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2695 // First, print the message.
2696 print(throwable(), st);
2697 st->cr();
2698
2699 // Now print the stack trace.
2700 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2701 while (throwable.not_null()) {
2702 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2703 if (result.is_null()) {
2704 st->print_raw_cr("\t<<no stack trace available>>");
2705 return;
2706 }
2707 BacktraceIterator iter(result, THREAD);
2708
2709 while (iter.repeat()) {
2710 BacktraceElement bte = iter.next(THREAD);
2711 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2712 }
2713 if (THREAD->can_call_java()) {
2714 // Call getCause() which doesn't necessarily return the _cause field.
2715 ExceptionMark em(THREAD);
2716 JavaValue cause(T_OBJECT);
2717 JavaCalls::call_virtual(&cause,
2718 throwable,
2719 throwable->klass(),
2720 vmSymbols::getCause_name(),
2721 vmSymbols::void_throwable_signature(),
2722 THREAD);
2723 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2724 if (HAS_PENDING_EXCEPTION) {
2725 CLEAR_PENDING_EXCEPTION;
2726 throwable = Handle();
2727 } else {
2728 throwable = Handle(THREAD, cause.get_oop());
2729 if (throwable.not_null()) {
2730 st->print("Caused by: ");
2731 print(throwable(), st);
2732 st->cr();
2733 }
2734 }
2735 } else {
2736 st->print_raw_cr("<<cannot call Java to get cause>>");
2737 return;
2738 }
2739 }
2740 }
2741
2742 /**
2743 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2744 */
2745 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2746 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2747 JavaValue result(T_VOID);
2748 JavaCalls::call_virtual(&result,
2749 throwable,
2750 vmClasses::Throwable_klass(),
2751 vmSymbols::printStackTrace_name(),
2752 vmSymbols::void_method_signature(),
2753 THREAD);
2754 }
2755
2756 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2757 if (!StackTraceInThrowable) return;
2758 ResourceMark rm(THREAD);
2759
2760 // Start out by clearing the backtrace for this object, in case the VM
2761 // runs out of memory while allocating the stack trace
2762 set_backtrace(throwable(), nullptr);
2763 // Clear lazily constructed Java level stacktrace if refilling occurs
2764 // This is unnecessary in 1.7+ but harmless
2765 clear_stacktrace(throwable());
2766
2767 int max_depth = MaxJavaStackTraceDepth;
2768 JavaThread* thread = THREAD;
2769
2770 BacktraceBuilder bt(CHECK);
2771
2772 // If there is no Java frame just return the method that was being called
2773 // with bci 0
2774 if (!thread->has_last_Java_frame()) {
2775 if (max_depth >= 1 && method() != nullptr) {
2776 bt.push(method(), 0, CHECK);
2777 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2778 set_depth(throwable(), 1);
2779 set_backtrace(throwable(), bt.backtrace());
2780 }
2781 return;
2782 }
2783
2784 // Instead of using vframe directly, this version of fill_in_stack_trace
2785 // basically handles everything by hand. This significantly improved the
2786 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2787 // See bug 6333838 for more details.
2788 // The "ASSERT" here is to verify this method generates the exactly same stack
2789 // trace as utilizing vframe.
2790 #ifdef ASSERT
2791 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2792 #endif
2793 int total_count = 0;
2794 RegisterMap map(thread,
2795 RegisterMap::UpdateMap::skip,
2796 RegisterMap::ProcessFrames::skip,
2797 RegisterMap::WalkContinuation::include);
2798 int decode_offset = 0;
2799 nmethod* nm = nullptr;
2800 bool skip_fillInStackTrace_check = false;
2801 bool skip_throwableInit_check = false;
2802 bool skip_hidden = !ShowHiddenFrames;
2803 bool show_carrier = ShowCarrierFrames;
2804 ContinuationEntry* cont_entry = thread->last_continuation();
2805 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2806 Method* method = nullptr;
2807 int bci = 0;
2808
2809 // Compiled java method case.
2810 if (decode_offset != 0) {
2811 DebugInfoReadStream stream(nm, decode_offset);
2812 decode_offset = stream.read_int();
2813 method = (Method*)nm->metadata_at(stream.read_int());
2814 bci = stream.read_bci();
2815 } else {
2816 if (fr.is_first_frame()) break;
2817
2818 if (Continuation::is_continuation_enterSpecial(fr)) {
2819 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2820 if (!show_carrier && cont_entry->is_virtual_thread()) {
2821 break;
2822 }
2823 cont_entry = cont_entry->parent();
2824 }
2825
2826 address pc = fr.pc();
2827 if (fr.is_interpreted_frame()) {
2828 address bcp;
2829 if (!map.in_cont()) {
2830 bcp = fr.interpreter_frame_bcp();
2831 method = fr.interpreter_frame_method();
2832 } else {
2833 bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2834 method = map.stack_chunk()->interpreter_frame_method(fr);
2835 }
2836 bci = method->bci_from(bcp);
2837 fr = fr.sender(&map);
2838 } else {
2839 CodeBlob* cb = fr.cb();
2840 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2841 // but non nmethod
2842 fr = fr.sender(&map);
2843 if (cb == nullptr || !cb->is_nmethod()) {
2844 continue;
2845 }
2846 nm = cb->as_nmethod();
2847 assert(nm->method() != nullptr, "must be");
2848 if (nm->method()->is_native()) {
2849 method = nm->method();
2850 bci = 0;
2851 } else {
2852 PcDesc* pd = nm->pc_desc_at(pc);
2853 decode_offset = pd->scope_decode_offset();
2854 // if decode_offset is not equal to 0, it will execute the
2855 // "compiled java method case" at the beginning of the loop.
2856 continue;
2857 }
2858 }
2859 }
2860 #ifdef ASSERT
2861 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2862 assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2863 st.next();
2864 }
2865 #endif
2866
2867 // the format of the stacktrace will be:
2868 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2869 // - 0 or more <init> methods for the exception class (skipped)
2870 // - rest of the stack
2871
2872 if (!skip_fillInStackTrace_check) {
2873 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2874 throwable->is_a(method->method_holder())) {
2875 continue;
2876 }
2877 else {
2878 skip_fillInStackTrace_check = true; // gone past them all
2879 }
2880 }
2881 if (!skip_throwableInit_check) {
2882 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2883
2884 // skip <init> methods of the exception class and superclasses
2885 // This is similar to classic VM.
2886 if (method->name() == vmSymbols::object_initializer_name() &&
2887 throwable->is_a(method->method_holder())) {
2888 continue;
2889 } else {
2890 // there are none or we've seen them all - either way stop checking
2891 skip_throwableInit_check = true;
2892 }
2893 }
2894 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2895 if (skip_hidden) {
2896 if (total_count == 0) {
2897 // The top frame will be hidden from the stack trace.
2898 bt.set_has_hidden_top_frame();
2899 }
2900 continue;
2901 }
2902 }
2903
2904 bt.push(method, bci, CHECK);
2905 total_count++;
2906 }
2907
2908 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2909
2910 // Put completed stack trace into throwable object
2911 set_backtrace(throwable(), bt.backtrace());
2912 set_depth(throwable(), total_count);
2913 }
2914
2915 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2916 // No-op if stack trace is disabled
2917 if (!StackTraceInThrowable) {
2918 return;
2919 }
2920
2921 // Disable stack traces for some preallocated out of memory errors
2922 if (!Universe::should_fill_in_stack_trace(throwable)) {
2923 return;
2924 }
2925
2926 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2927 PreserveExceptionMark pm(THREAD);
2928
2929 fill_in_stack_trace(throwable, method, THREAD);
2930 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2931 // original exception via the PreserveExceptionMark destructor.
2932 CLEAR_PENDING_EXCEPTION;
2933 }
2934
2935 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2936 // Allocate stack trace - backtrace is created but not filled in
2937
2938 // No-op if stack trace is disabled
2939 if (!StackTraceInThrowable) return;
2940 BacktraceBuilder bt(CHECK); // creates a backtrace
2941 set_backtrace(throwable(), bt.backtrace());
2942 }
2943
2944
2945 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2946 // Fill in stack trace into preallocated backtrace (no GC)
2947
2948 // No-op if stack trace is disabled
2949 if (!StackTraceInThrowable) return;
2950
2951 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2952
2953 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2954
2955 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2956 assert(backtrace.not_null(), "backtrace should have been preallocated");
2957
2958 ResourceMark rm(THREAD);
2959 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2960
2961 BacktraceBuilder bt(THREAD, backtrace);
2962
2963 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2964 // methods as preallocated errors aren't created by "java" code.
2965
2966 // fill in as much stack trace as possible
2967 int chunk_count = 0;
2968 for (;!st.at_end(); st.next()) {
2969 bt.push(st.method(), st.bci(), CHECK);
2970 chunk_count++;
2971
2972 // Bail-out for deep stacks
2973 if (chunk_count >= trace_chunk_size) break;
2974 }
2975 set_depth(throwable(), chunk_count);
2976 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2977
2978 // We support the Throwable immutability protocol defined for Java 7.
2979 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2980 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2981 }
2982
2983 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2984 objArrayHandle stack_trace_array_h, TRAPS) {
2985
2986 if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2987 THROW(vmSymbols::java_lang_NullPointerException());
2988 }
2989
2990 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2991
2992 if (stack_trace_array_h->length() != depth) {
2993 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2994 }
2995
2996 objArrayHandle result(THREAD, objArrayOop(backtrace()));
2997 BacktraceIterator iter(result, THREAD);
2998
2999 int index = 0;
3000 while (iter.repeat()) {
3001 BacktraceElement bte = iter.next(THREAD);
3002
3003 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
3004
3005 if (stack_trace_element.is_null()) {
3006 THROW(vmSymbols::java_lang_NullPointerException());
3007 }
3008
3009 InstanceKlass* holder = java_lang_Class::as_InstanceKlass(bte._mirror());
3010 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
3011
3012 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
3013 method,
3014 bte._version,
3015 bte._bci,
3016 bte._name,
3017 CHECK);
3018 }
3019 }
3020
3021 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
3022 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
3023 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
3024 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
3025 // symbolic stacktrace of 'throwable'.
3026 assert(throwable.not_null(), "shouldn't be");
3027
3028 // Now create the message from the original exception and thread name.
3029 ResourceMark rm(current);
3030 const char *message = nullptr;
3031 oop detailed_message = java_lang_Throwable::message(throwable());
3032 if (detailed_message != nullptr) {
3033 message = java_lang_String::as_utf8_string(detailed_message);
3034 }
3035 stringStream st;
3036 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
3037 message == nullptr ? "" : ":");
3038 if (message == nullptr) {
3039 st.print("[in thread \"%s\"]", current->name());
3040 } else {
3041 st.print("%s [in thread \"%s\"]", message, current->name());
3042 }
3043
3044 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
3045 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
3046 // If new_exception returns a different exception while creating the exception,
3047 // abandon the attempt to save the initialization error and return null.
3048 if (init_error->klass()->name() != exception_name) {
3049 log_info(class, init)("Exception %s thrown while saving initialization exception",
3050 init_error->klass()->external_name());
3051 return Handle();
3052 }
3053
3054 // Call to java to fill in the stack trace and clear declaringClassObject to
3055 // not keep classes alive in the stack trace.
3056 // call this: public StackTraceElement[] getStackTrace()
3057 JavaValue result(T_ARRAY);
3058 JavaCalls::call_virtual(&result, throwable,
3059 vmClasses::Throwable_klass(),
3060 vmSymbols::getStackTrace_name(),
3061 vmSymbols::getStackTrace_signature(),
3062 current);
3063 if (!current->has_pending_exception()){
3064 Handle stack_trace(current, result.get_oop());
3065 assert(stack_trace->is_objArray(), "Should be an array");
3066 java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
3067 // Clear backtrace because the stacktrace should be used instead.
3068 set_backtrace(init_error(), nullptr);
3069 } else {
3070 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
3071 init_error->klass()->external_name());
3072 current->clear_pending_exception();
3073 }
3074
3075 return init_error;
3076 }
3077
3078 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
3079 JavaThread* current = JavaThread::current();
3080 objArrayHandle result(current, objArrayOop(backtrace(throwable)));
3081 BacktraceIterator iter(result, current);
3082 // No backtrace available.
3083 if (!iter.repeat()) return false;
3084
3085 // If the exception happened in a frame that has been hidden, i.e.,
3086 // omitted from the back trace, we can not compute the message.
3087 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
3088 if (hidden != nullptr) {
3089 return false;
3090 }
3091
3092 // Get first backtrace element.
3093 BacktraceElement bte = iter.next(current);
3094
3095 InstanceKlass* holder = java_lang_Class::as_InstanceKlass(bte._mirror());
3096 assert(holder != nullptr, "first element should be non-null");
3097 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
3098
3099 // Original version is no longer available.
3100 if (m == nullptr || !version_matches(m, bte._version)) {
3101 return false;
3102 }
3103
3104 *method = m;
3105 *bci = bte._bci;
3106 return true;
3107 }
3108
3109 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
3110 // Allocate java.lang.StackTraceElement instance
3111 InstanceKlass* k = vmClasses::StackTraceElement_klass();
3112 assert(k != nullptr, "must be loaded in 1.4+");
3113 if (k->should_be_initialized()) {
3114 k->initialize(CHECK_NULL);
3115 }
3116
3117 Handle element = k->allocate_instance_handle(CHECK_NULL);
3118
3119 int version = method->constants()->version();
3120 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
3121 return element();
3122 }
3123
3124 void java_lang_StackTraceElement::fill_in(Handle element,
3125 InstanceKlass* holder, const methodHandle& method,
3126 int version, int bci, Symbol* name, TRAPS) {
3127 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
3128
3129 ResourceMark rm(THREAD);
3130 HandleMark hm(THREAD);
3131
3132 // Fill in class name
3133 Handle java_class(THREAD, holder->java_mirror());
3134 oop classname = java_lang_Class::name(java_class, CHECK);
3135 java_lang_StackTraceElement::set_declaringClass(element(), classname);
3136 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
3137
3138 oop loader = holder->class_loader();
3139 if (loader != nullptr) {
3140 oop loader_name = java_lang_ClassLoader::name(loader);
3141 if (loader_name != nullptr)
3142 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
3143 }
3144
3145 // Fill in method name
3146 oop methodname = StringTable::intern(name, CHECK);
3147 java_lang_StackTraceElement::set_methodName(element(), methodname);
3148
3149 // Fill in module name and version
3150 ModuleEntry* module = holder->module();
3151 if (module->is_named()) {
3152 oop module_name = StringTable::intern(module->name(), CHECK);
3153 java_lang_StackTraceElement::set_moduleName(element(), module_name);
3154 oop module_version;
3155 if (module->version() != nullptr) {
3156 module_version = StringTable::intern(module->version(), CHECK);
3157 } else {
3158 module_version = nullptr;
3159 }
3160 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
3161 }
3162
3163 if (method() == nullptr || !version_matches(method(), version)) {
3164 // The method was redefined, accurate line number information isn't available
3165 java_lang_StackTraceElement::set_fileName(element(), nullptr);
3166 java_lang_StackTraceElement::set_lineNumber(element(), -1);
3167 } else {
3168 Symbol* source;
3169 oop source_file;
3170 int line_number;
3171 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
3172
3173 java_lang_StackTraceElement::set_fileName(element(), source_file);
3174 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
3175 }
3176 }
3177
3178 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
3179 InstanceKlass* holder,
3180 int version,
3181 const methodHandle& method,
3182 int bci,
3183 Symbol*& source,
3184 oop& source_file,
3185 int& line_number, TRAPS) {
3186 // Fill in source file name and line number.
3187 source = Backtrace::get_source_file_name(holder, version);
3188 source_file = java_lang_Class::source_file(java_class());
3189 if (source != nullptr) {
3190 // Class was not redefined. We can trust its cache if set,
3191 // else we have to initialize it.
3192 if (source_file == nullptr) {
3193 source_file = StringTable::intern(source, CHECK);
3194 java_lang_Class::set_source_file(java_class(), source_file);
3195 }
3196 } else {
3197 // Class was redefined. Dump the cache if it was set.
3198 if (source_file != nullptr) {
3199 source_file = nullptr;
3200 java_lang_Class::set_source_file(java_class(), source_file);
3201 }
3202 }
3203 line_number = Backtrace::get_line_number(method(), bci);
3204 }
3205
3206 #if INCLUDE_JVMCI
3207 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
3208 Symbol*& filename, int& line_number, TRAPS) {
3209 ResourceMark rm(THREAD);
3210 HandleMark hm(THREAD);
3211
3212 filename = nullptr;
3213 line_number = -1;
3214
3215 oop source_file;
3216 int version = method->constants()->version();
3217 InstanceKlass* holder = method->method_holder();
3218 Handle java_class(THREAD, holder->java_mirror());
3219 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
3220 }
3221 #endif // INCLUDE_JVMCI
3222
3223 // java_lang_ClassFrameInfo
3224
3225 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
3226 int java_lang_ClassFrameInfo::_flags_offset;
3227
3228 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
3229 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \
3230 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false)
3231
3232 void java_lang_ClassFrameInfo::compute_offsets() {
3233 InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
3234 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3235 }
3236
3237 #if INCLUDE_CDS
3238 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
3239 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3240 }
3241 #endif
3242
3243 static int get_flags(const methodHandle& m) {
3244 int flags = m->access_flags().as_method_flags();
3245 if (m->is_object_initializer()) {
3246 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR;
3247 } else {
3248 // Note: Static initializers can be here. Record them as plain methods.
3249 flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
3250 }
3251 if (m->caller_sensitive()) {
3252 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
3253 }
3254 if (m->is_hidden()) {
3255 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3256 }
3257 assert((flags & 0xFF000000) == 0, "unexpected flags");
3258 return flags;
3259 }
3260
3261 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3262 return obj->obj_field(_classOrMemberName_offset);
3263 }
3264
3265 int java_lang_ClassFrameInfo::flags(oop obj) {
3266 return obj->int_field(_flags_offset);
3267 }
3268
3269 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3270 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3271 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3272 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3273 stackFrame->int_field_put(_flags_offset, flags);
3274 }
3275
3276 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3277 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3278 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3279 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3280 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3281 stackFrame->int_field_put(_flags_offset, flags);
3282 }
3283
3284
3285 // java_lang_StackFrameInfo
3286
3287 int java_lang_StackFrameInfo::_type_offset;
3288 int java_lang_StackFrameInfo::_name_offset;
3289 int java_lang_StackFrameInfo::_bci_offset;
3290 int java_lang_StackFrameInfo::_version_offset;
3291 int java_lang_StackFrameInfo::_contScope_offset;
3292
3293 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3294 macro(_type_offset, k, "type", object_signature, false); \
3295 macro(_name_offset, k, "name", string_signature, false); \
3296 macro(_bci_offset, k, "bci", int_signature, false); \
3297 macro(_contScope_offset, k, "contScope", continuationscope_signature, false)
3298
3299 void java_lang_StackFrameInfo::compute_offsets() {
3300 InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3301 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3302 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3303 }
3304
3305 #if INCLUDE_CDS
3306 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3307 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3308 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3309 }
3310 #endif
3311
3312 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3313 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3314 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3315 return method;
3316 }
3317
3318 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3319 // set Method* or mid/cpref
3320 HandleMark hm(THREAD);
3321 Handle cont_h(THREAD, cont);
3322 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3323
3324 // set bci
3325 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3326 // method may be redefined; store the version
3327 int version = method->constants()->version();
3328 assert((jushort)version == version, "version should be short");
3329 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3330
3331 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3332 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3333 }
3334
3335 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3336 ResourceMark rm(THREAD);
3337 HandleMark hm(THREAD);
3338
3339 Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3340 InstanceKlass* holder = method->method_holder();
3341 short version = stackFrame->short_field(_version_offset);
3342 int bci = stackFrame->int_field(_bci_offset);
3343 Symbol* name = method->name();
3344 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3345 }
3346
3347 oop java_lang_StackFrameInfo::type(oop obj) {
3348 return obj->obj_field(_type_offset);
3349 }
3350
3351 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3352 obj->obj_field_put(_type_offset, value);
3353 }
3354
3355 oop java_lang_StackFrameInfo::name(oop obj) {
3356 return obj->obj_field(_name_offset);
3357 }
3358
3359 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3360 obj->obj_field_put(_name_offset, value);
3361 }
3362
3363 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3364 obj->short_field_put(_version_offset, value);
3365 }
3366
3367 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3368 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3369 obj->int_field_put(_bci_offset, value);
3370 }
3371
3372 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3373 obj->obj_field_put(_contScope_offset, value);
3374 }
3375
3376 int java_lang_LiveStackFrameInfo::_monitors_offset;
3377 int java_lang_LiveStackFrameInfo::_locals_offset;
3378 int java_lang_LiveStackFrameInfo::_operands_offset;
3379 int java_lang_LiveStackFrameInfo::_mode_offset;
3380
3381 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3382 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
3383 macro(_locals_offset, k, "locals", object_array_signature, false); \
3384 macro(_operands_offset, k, "operands", object_array_signature, false); \
3385 macro(_mode_offset, k, "mode", int_signature, false)
3386
3387 void java_lang_LiveStackFrameInfo::compute_offsets() {
3388 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3389 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3390 }
3391
3392 #if INCLUDE_CDS
3393 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3394 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3395 }
3396 #endif
3397
3398 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3399 obj->obj_field_put(_monitors_offset, value);
3400 }
3401
3402 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3403 obj->obj_field_put(_locals_offset, value);
3404 }
3405
3406 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3407 obj->obj_field_put(_operands_offset, value);
3408 }
3409
3410 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3411 obj->int_field_put(_mode_offset, value);
3412 }
3413
3414
3415 // java_lang_AccessibleObject
3416
3417 int java_lang_reflect_AccessibleObject::_override_offset;
3418
3419 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3420 macro(_override_offset, k, "override", bool_signature, false)
3421
3422 void java_lang_reflect_AccessibleObject::compute_offsets() {
3423 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3424 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3425 }
3426
3427 #if INCLUDE_CDS
3428 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3429 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3430 }
3431 #endif
3432
3433 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3434 return (jboolean) reflect->bool_field(_override_offset);
3435 }
3436
3437 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3438 reflect->bool_field_put(_override_offset, (int) value);
3439 }
3440
3441 // java_lang_reflect_Method
3442
3443 int java_lang_reflect_Method::_clazz_offset;
3444 int java_lang_reflect_Method::_name_offset;
3445 int java_lang_reflect_Method::_returnType_offset;
3446 int java_lang_reflect_Method::_parameterTypes_offset;
3447 int java_lang_reflect_Method::_exceptionTypes_offset;
3448 int java_lang_reflect_Method::_slot_offset;
3449 int java_lang_reflect_Method::_modifiers_offset;
3450 int java_lang_reflect_Method::_signature_offset;
3451 int java_lang_reflect_Method::_annotations_offset;
3452 int java_lang_reflect_Method::_parameter_annotations_offset;
3453 int java_lang_reflect_Method::_annotation_default_offset;
3454
3455 #define METHOD_FIELDS_DO(macro) \
3456 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3457 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3458 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
3459 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3460 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3461 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3462 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3463 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3464 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3465 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3466 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
3467
3468 void java_lang_reflect_Method::compute_offsets() {
3469 InstanceKlass* k = vmClasses::reflect_Method_klass();
3470 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3471 }
3472
3473 #if INCLUDE_CDS
3474 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3475 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3476 }
3477 #endif
3478
3479 Handle java_lang_reflect_Method::create(TRAPS) {
3480 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3481 InstanceKlass* klass = vmClasses::reflect_Method_klass();
3482 // This class is eagerly initialized during VM initialization, since we keep a reference
3483 // to one of the methods
3484 assert(klass->is_initialized(), "must be initialized");
3485 return klass->allocate_instance_handle(THREAD);
3486 }
3487
3488 oop java_lang_reflect_Method::clazz(oop reflect) {
3489 return reflect->obj_field(_clazz_offset);
3490 }
3491
3492 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3493 reflect->obj_field_put(_clazz_offset, value);
3494 }
3495
3496 int java_lang_reflect_Method::slot(oop reflect) {
3497 return reflect->int_field(_slot_offset);
3498 }
3499
3500 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3501 reflect->int_field_put(_slot_offset, value);
3502 }
3503
3504 void java_lang_reflect_Method::set_name(oop method, oop value) {
3505 method->obj_field_put(_name_offset, value);
3506 }
3507
3508 oop java_lang_reflect_Method::return_type(oop method) {
3509 return method->obj_field(_returnType_offset);
3510 }
3511
3512 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3513 method->obj_field_put(_returnType_offset, value);
3514 }
3515
3516 oop java_lang_reflect_Method::parameter_types(oop method) {
3517 return method->obj_field(_parameterTypes_offset);
3518 }
3519
3520 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3521 method->obj_field_put(_parameterTypes_offset, value);
3522 }
3523
3524 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3525 method->obj_field_put(_exceptionTypes_offset, value);
3526 }
3527
3528 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3529 method->int_field_put(_modifiers_offset, value);
3530 }
3531
3532 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3533 method->obj_field_put(_signature_offset, value);
3534 }
3535
3536 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3537 method->obj_field_put(_annotations_offset, value);
3538 }
3539
3540 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3541 method->obj_field_put(_parameter_annotations_offset, value);
3542 }
3543
3544 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3545 method->obj_field_put(_annotation_default_offset, value);
3546 }
3547
3548 int java_lang_reflect_Constructor::_clazz_offset;
3549 int java_lang_reflect_Constructor::_parameterTypes_offset;
3550 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3551 int java_lang_reflect_Constructor::_slot_offset;
3552 int java_lang_reflect_Constructor::_modifiers_offset;
3553 int java_lang_reflect_Constructor::_signature_offset;
3554 int java_lang_reflect_Constructor::_annotations_offset;
3555 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3556
3557 #define CONSTRUCTOR_FIELDS_DO(macro) \
3558 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3559 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3560 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3561 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3562 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3563 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3564 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3565 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3566
3567 void java_lang_reflect_Constructor::compute_offsets() {
3568 InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3569 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3570 }
3571
3572 #if INCLUDE_CDS
3573 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3574 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3575 }
3576 #endif
3577
3578 Handle java_lang_reflect_Constructor::create(TRAPS) {
3579 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3580 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3581 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3582 InstanceKlass* ik = InstanceKlass::cast(k);
3583 // Ensure it is initialized
3584 ik->initialize(CHECK_NH);
3585 return ik->allocate_instance_handle(THREAD);
3586 }
3587
3588 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3589 return reflect->obj_field(_clazz_offset);
3590 }
3591
3592 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3593 reflect->obj_field_put(_clazz_offset, value);
3594 }
3595
3596 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3597 return constructor->obj_field(_parameterTypes_offset);
3598 }
3599
3600 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3601 constructor->obj_field_put(_parameterTypes_offset, value);
3602 }
3603
3604 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3605 constructor->obj_field_put(_exceptionTypes_offset, value);
3606 }
3607
3608 int java_lang_reflect_Constructor::slot(oop reflect) {
3609 return reflect->int_field(_slot_offset);
3610 }
3611
3612 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3613 reflect->int_field_put(_slot_offset, value);
3614 }
3615
3616 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3617 constructor->int_field_put(_modifiers_offset, value);
3618 }
3619
3620 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3621 constructor->obj_field_put(_signature_offset, value);
3622 }
3623
3624 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3625 constructor->obj_field_put(_annotations_offset, value);
3626 }
3627
3628 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3629 method->obj_field_put(_parameter_annotations_offset, value);
3630 }
3631
3632 int java_lang_reflect_Field::_clazz_offset;
3633 int java_lang_reflect_Field::_name_offset;
3634 int java_lang_reflect_Field::_type_offset;
3635 int java_lang_reflect_Field::_slot_offset;
3636 int java_lang_reflect_Field::_modifiers_offset;
3637 int java_lang_reflect_Field::_trusted_final_offset;
3638 int java_lang_reflect_Field::_signature_offset;
3639 int java_lang_reflect_Field::_annotations_offset;
3640
3641 #define FIELD_FIELDS_DO(macro) \
3642 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3643 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3644 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \
3645 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3646 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3647 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \
3648 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3649 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3650
3651 void java_lang_reflect_Field::compute_offsets() {
3652 InstanceKlass* k = vmClasses::reflect_Field_klass();
3653 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3654 }
3655
3656 #if INCLUDE_CDS
3657 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3658 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3659 }
3660 #endif
3661
3662 Handle java_lang_reflect_Field::create(TRAPS) {
3663 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3664 Symbol* name = vmSymbols::java_lang_reflect_Field();
3665 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3666 InstanceKlass* ik = InstanceKlass::cast(k);
3667 // Ensure it is initialized
3668 ik->initialize(CHECK_NH);
3669 return ik->allocate_instance_handle(THREAD);
3670 }
3671
3672 oop java_lang_reflect_Field::clazz(oop reflect) {
3673 return reflect->obj_field(_clazz_offset);
3674 }
3675
3676 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3677 reflect->obj_field_put(_clazz_offset, value);
3678 }
3679
3680 oop java_lang_reflect_Field::name(oop field) {
3681 return field->obj_field(_name_offset);
3682 }
3683
3684 void java_lang_reflect_Field::set_name(oop field, oop value) {
3685 field->obj_field_put(_name_offset, value);
3686 }
3687
3688 oop java_lang_reflect_Field::type(oop field) {
3689 return field->obj_field(_type_offset);
3690 }
3691
3692 void java_lang_reflect_Field::set_type(oop field, oop value) {
3693 field->obj_field_put(_type_offset, value);
3694 }
3695
3696 int java_lang_reflect_Field::slot(oop reflect) {
3697 return reflect->int_field(_slot_offset);
3698 }
3699
3700 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3701 reflect->int_field_put(_slot_offset, value);
3702 }
3703
3704 int java_lang_reflect_Field::modifiers(oop field) {
3705 return field->int_field(_modifiers_offset);
3706 }
3707
3708 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3709 field->int_field_put(_modifiers_offset, value);
3710 }
3711
3712 void java_lang_reflect_Field::set_trusted_final(oop field) {
3713 field->bool_field_put(_trusted_final_offset, true);
3714 }
3715
3716 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3717 field->obj_field_put(_signature_offset, value);
3718 }
3719
3720 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3721 field->obj_field_put(_annotations_offset, value);
3722 }
3723
3724 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3725 // Allocate java.lang.reflect.RecordComponent instance
3726 HandleMark hm(THREAD);
3727 InstanceKlass* ik = vmClasses::RecordComponent_klass();
3728 assert(ik != nullptr, "must be loaded");
3729 ik->initialize(CHECK_NULL);
3730
3731 Handle element = ik->allocate_instance_handle(CHECK_NULL);
3732
3733 Handle decl_class(THREAD, holder->java_mirror());
3734 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3735
3736 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3737 oop component_name = StringTable::intern(name, CHECK_NULL);
3738 java_lang_reflect_RecordComponent::set_name(element(), component_name);
3739
3740 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3741 Handle component_type_h =
3742 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3743 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3744
3745 Method* accessor_method = nullptr;
3746 {
3747 // Prepend "()" to type to create the full method signature.
3748 ResourceMark rm(THREAD);
3749 int sig_len = type->utf8_length() + 3; // "()" and null char
3750 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3751 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3752 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3753 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3754 }
3755
3756 if (accessor_method != nullptr) {
3757 methodHandle method(THREAD, accessor_method);
3758 oop m = Reflection::new_method(method, false, CHECK_NULL);
3759 java_lang_reflect_RecordComponent::set_accessor(element(), m);
3760 } else {
3761 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3762 }
3763
3764 int sig_index = component->generic_signature_index();
3765 if (sig_index > 0) {
3766 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3767 oop component_sig = StringTable::intern(sig, CHECK_NULL);
3768 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3769 } else {
3770 java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3771 }
3772
3773 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3774 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3775
3776 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3777 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3778
3779 return element();
3780 }
3781
3782 int reflect_ConstantPool::_vmholder_offset;
3783
3784 void reflect_ConstantPool::compute_offsets() {
3785 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3786 // The field is injected and called Object vmholder in the jdk.internal.reflect.ConstantPool class.
3787 CONSTANTPOOL_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3788 }
3789
3790 #if INCLUDE_CDS
3791 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3792 CONSTANTPOOL_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3793 }
3794 #endif
3795
3796 int java_lang_reflect_Parameter::_name_offset;
3797 int java_lang_reflect_Parameter::_modifiers_offset;
3798 int java_lang_reflect_Parameter::_index_offset;
3799 int java_lang_reflect_Parameter::_executable_offset;
3800
3801 #define PARAMETER_FIELDS_DO(macro) \
3802 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3803 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3804 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \
3805 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3806
3807 void java_lang_reflect_Parameter::compute_offsets() {
3808 InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3809 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3810 }
3811
3812 #if INCLUDE_CDS
3813 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3814 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3815 }
3816 #endif
3817
3818 Handle java_lang_reflect_Parameter::create(TRAPS) {
3819 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3820 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3821 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3822 InstanceKlass* ik = InstanceKlass::cast(k);
3823 // Ensure it is initialized
3824 ik->initialize(CHECK_NH);
3825 return ik->allocate_instance_handle(THREAD);
3826 }
3827
3828 oop java_lang_reflect_Parameter::name(oop param) {
3829 return param->obj_field(_name_offset);
3830 }
3831
3832 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3833 param->obj_field_put(_name_offset, value);
3834 }
3835
3836 int java_lang_reflect_Parameter::modifiers(oop param) {
3837 return param->int_field(_modifiers_offset);
3838 }
3839
3840 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3841 param->int_field_put(_modifiers_offset, value);
3842 }
3843
3844 int java_lang_reflect_Parameter::index(oop param) {
3845 return param->int_field(_index_offset);
3846 }
3847
3848 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3849 param->int_field_put(_index_offset, value);
3850 }
3851
3852 oop java_lang_reflect_Parameter::executable(oop param) {
3853 return param->obj_field(_executable_offset);
3854 }
3855
3856 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3857 param->obj_field_put(_executable_offset, value);
3858 }
3859
3860 // java_lang_Module
3861
3862 int java_lang_Module::_loader_offset;
3863 int java_lang_Module::_name_offset;
3864 int java_lang_Module::_module_entry_offset;
3865
3866 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3867 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3868 return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3869 vmSymbols::java_lang_module_init_signature(),
3870 loader, module_name, CHECK_NH);
3871 }
3872
3873 #define MODULE_FIELDS_DO(macro) \
3874 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3875 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false)
3876
3877 void java_lang_Module::compute_offsets() {
3878 InstanceKlass* k = vmClasses::Module_klass();
3879 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3880 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3881 }
3882
3883 #if INCLUDE_CDS
3884 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3885 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3886 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3887 }
3888 #endif
3889
3890 oop java_lang_Module::loader(oop module) {
3891 return module->obj_field(_loader_offset);
3892 }
3893
3894 void java_lang_Module::set_loader(oop module, oop value) {
3895 module->obj_field_put(_loader_offset, value);
3896 }
3897
3898 oop java_lang_Module::name(oop module) {
3899 return module->obj_field(_name_offset);
3900 }
3901
3902 void java_lang_Module::set_name(oop module, oop value) {
3903 module->obj_field_put(_name_offset, value);
3904 }
3905
3906 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3907 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3908 assert(module != nullptr, "module can't be null");
3909 assert(oopDesc::is_oop(module), "module must be oop");
3910
3911 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3912 return module_entry;
3913 }
3914
3915 ModuleEntry* java_lang_Module::module_entry(oop module) {
3916 ModuleEntry* module_entry = module_entry_raw(module);
3917 if (module_entry == nullptr) {
3918 // If the inject field containing the ModuleEntry* is null then return the
3919 // class loader's unnamed module.
3920 oop loader = java_lang_Module::loader(module);
3921 Handle h_loader = Handle(Thread::current(), loader);
3922 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3923 return loader_cld->unnamed_module();
3924 }
3925 return module_entry;
3926 }
3927
3928 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3929 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3930 assert(module != nullptr, "module can't be null");
3931 assert(oopDesc::is_oop(module), "module must be oop");
3932 module->address_field_put(_module_entry_offset, (address)module_entry);
3933 }
3934
3935 Handle reflect_ConstantPool::create(TRAPS) {
3936 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3937 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3938 // Ensure it is initialized
3939 k->initialize(CHECK_NH);
3940 return k->allocate_instance_handle(THREAD);
3941 }
3942
3943
3944 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3945 assert(_vmholder_offset != 0, "Uninitialized vmholder");
3946 oop mirror = value->pool_holder()->java_mirror();
3947 // Save the mirror to get back the constant pool.
3948 reflect->obj_field_put(_vmholder_offset, mirror);
3949 }
3950
3951 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3952 assert(_vmholder_offset != 0, "Uninitialized vmholder");
3953 oop mirror = reflect->obj_field(_vmholder_offset);
3954 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(mirror);
3955
3956 // Get the constant pool back from the klass. Since class redefinition
3957 // merges the new constant pool into the old, this is essentially the
3958 // same constant pool as the original. If constant pool merging is
3959 // no longer done in the future, this will have to change to save
3960 // the original.
3961 return ik->constants();
3962 }
3963
3964
3965 // Support for java_lang_ref_Reference
3966
3967 bool java_lang_ref_Reference::_offsets_initialized;
3968
3969 int java_lang_ref_Reference::_referent_offset;
3970 int java_lang_ref_Reference::_queue_offset;
3971 int java_lang_ref_Reference::_next_offset;
3972 int java_lang_ref_Reference::_discovered_offset;
3973
3974 #define REFERENCE_FIELDS_DO(macro) \
3975 macro(_referent_offset, k, "referent", object_signature, false); \
3976 macro(_queue_offset, k, "queue", referencequeue_signature, false); \
3977 macro(_next_offset, k, "next", reference_signature, false); \
3978 macro(_discovered_offset, k, "discovered", reference_signature, false);
3979
3980 void java_lang_ref_Reference::compute_offsets() {
3981 if (_offsets_initialized) {
3982 return;
3983 }
3984 _offsets_initialized = true;
3985 InstanceKlass* k = vmClasses::Reference_klass();
3986 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3987 }
3988
3989 #if INCLUDE_CDS
3990 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3991 f->do_bool(&_offsets_initialized);
3992 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3993 }
3994 #endif
3995
3996 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3997 assert(obj != nullptr, "sanity");
3998 if (offset != _referent_offset) {
3999 return false;
4000 }
4001
4002 Klass* k = obj->klass();
4003 if (!k->is_instance_klass()) {
4004 return false;
4005 }
4006
4007 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
4008 bool is_reference = ik->reference_type() != REF_NONE;
4009 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
4010 return is_reference;
4011 }
4012
4013 int java_lang_boxing_object::_value_offset;
4014 int java_lang_boxing_object::_long_value_offset;
4015
4016 #define BOXING_FIELDS_DO(macro) \
4017 macro(_value_offset, integerKlass, "value", int_signature, false); \
4018 macro(_long_value_offset, longKlass, "value", long_signature, false);
4019
4020 void java_lang_boxing_object::compute_offsets() {
4021 InstanceKlass* integerKlass = vmClasses::Integer_klass();
4022 InstanceKlass* longKlass = vmClasses::Long_klass();
4023 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4024 }
4025
4026 #if INCLUDE_CDS
4027 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
4028 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4029 }
4030 #endif
4031
4032 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
4033 Klass* k = vmClasses::box_klass(type);
4034 if (k == nullptr) return nullptr;
4035 InstanceKlass* ik = InstanceKlass::cast(k);
4036 if (!ik->is_initialized()) {
4037 ik->initialize(CHECK_NULL);
4038 }
4039 return ik->allocate_instance(THREAD);
4040 }
4041
4042
4043 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
4044 oop box = initialize_and_allocate(type, CHECK_NULL);
4045 if (box == nullptr) return nullptr;
4046 switch (type) {
4047 case T_BOOLEAN:
4048 box->bool_field_put(_value_offset, value->z);
4049 break;
4050 case T_CHAR:
4051 box->char_field_put(_value_offset, value->c);
4052 break;
4053 case T_FLOAT:
4054 box->float_field_put(_value_offset, value->f);
4055 break;
4056 case T_DOUBLE:
4057 box->double_field_put(_long_value_offset, value->d);
4058 break;
4059 case T_BYTE:
4060 box->byte_field_put(_value_offset, value->b);
4061 break;
4062 case T_SHORT:
4063 box->short_field_put(_value_offset, value->s);
4064 break;
4065 case T_INT:
4066 box->int_field_put(_value_offset, value->i);
4067 break;
4068 case T_LONG:
4069 box->long_field_put(_long_value_offset, value->j);
4070 break;
4071 default:
4072 return nullptr;
4073 }
4074 return box;
4075 }
4076
4077
4078 BasicType java_lang_boxing_object::basic_type(oop box) {
4079 if (box == nullptr) return T_ILLEGAL;
4080 BasicType type = vmClasses::box_klass_type(box->klass());
4081 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
4082 return T_ILLEGAL;
4083 return type;
4084 }
4085
4086
4087 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
4088 BasicType type = vmClasses::box_klass_type(box->klass());
4089 switch (type) {
4090 case T_BOOLEAN:
4091 value->z = box->bool_field(_value_offset);
4092 break;
4093 case T_CHAR:
4094 value->c = box->char_field(_value_offset);
4095 break;
4096 case T_FLOAT:
4097 value->f = box->float_field(_value_offset);
4098 break;
4099 case T_DOUBLE:
4100 value->d = box->double_field(_long_value_offset);
4101 break;
4102 case T_BYTE:
4103 value->b = box->byte_field(_value_offset);
4104 break;
4105 case T_SHORT:
4106 value->s = box->short_field(_value_offset);
4107 break;
4108 case T_INT:
4109 value->i = box->int_field(_value_offset);
4110 break;
4111 case T_LONG:
4112 value->j = box->long_field(_long_value_offset);
4113 break;
4114 default:
4115 return T_ILLEGAL;
4116 } // end switch
4117 return type;
4118 }
4119
4120
4121 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
4122 BasicType type = vmClasses::box_klass_type(box->klass());
4123 switch (type) {
4124 case T_BOOLEAN:
4125 box->bool_field_put(_value_offset, value->z);
4126 break;
4127 case T_CHAR:
4128 box->char_field_put(_value_offset, value->c);
4129 break;
4130 case T_FLOAT:
4131 box->float_field_put(_value_offset, value->f);
4132 break;
4133 case T_DOUBLE:
4134 box->double_field_put(_long_value_offset, value->d);
4135 break;
4136 case T_BYTE:
4137 box->byte_field_put(_value_offset, value->b);
4138 break;
4139 case T_SHORT:
4140 box->short_field_put(_value_offset, value->s);
4141 break;
4142 case T_INT:
4143 box->int_field_put(_value_offset, value->i);
4144 break;
4145 case T_LONG:
4146 box->long_field_put(_long_value_offset, value->j);
4147 break;
4148 default:
4149 return T_ILLEGAL;
4150 } // end switch
4151 return type;
4152 }
4153
4154
4155 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
4156 switch (type) {
4157 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
4158 case T_CHAR: st->print("%d", value->c); break;
4159 case T_BYTE: st->print("%d", value->b); break;
4160 case T_SHORT: st->print("%d", value->s); break;
4161 case T_INT: st->print("%d", value->i); break;
4162 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
4163 case T_FLOAT: st->print("%f", value->f); break;
4164 case T_DOUBLE: st->print("%lf", value->d); break;
4165 default: st->print("type %d?", type); break;
4166 }
4167 }
4168
4169
4170 // Support for java_lang_ref_SoftReference
4171 //
4172
4173 int java_lang_ref_SoftReference::_timestamp_offset;
4174 int java_lang_ref_SoftReference::_static_clock_offset;
4175
4176 #define SOFTREFERENCE_FIELDS_DO(macro) \
4177 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
4178 macro(_static_clock_offset, k, "clock", long_signature, true)
4179
4180 void java_lang_ref_SoftReference::compute_offsets() {
4181 InstanceKlass* k = vmClasses::SoftReference_klass();
4182 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4183 }
4184
4185 #if INCLUDE_CDS
4186 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
4187 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4188 }
4189 #endif
4190
4191 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
4192 return ref->long_field(_timestamp_offset);
4193 }
4194
4195 jlong java_lang_ref_SoftReference::clock() {
4196 InstanceKlass* ik = vmClasses::SoftReference_klass();
4197 oop base = ik->static_field_base_raw();
4198 return base->long_field(_static_clock_offset);
4199 }
4200
4201 void java_lang_ref_SoftReference::set_clock(jlong value) {
4202 InstanceKlass* ik = vmClasses::SoftReference_klass();
4203 oop base = ik->static_field_base_raw();
4204 base->long_field_put(_static_clock_offset, value);
4205 }
4206
4207 // Support for java_lang_invoke_DirectMethodHandle
4208
4209 int java_lang_invoke_DirectMethodHandle::_member_offset;
4210
4211 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
4212 oop member_name = nullptr;
4213 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
4214 "a DirectMethodHandle oop is expected");
4215 return dmh->obj_field(_member_offset);
4216 }
4217
4218 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
4219 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
4220
4221 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
4222 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
4223 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4224 }
4225
4226 #if INCLUDE_CDS
4227 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
4228 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4229 }
4230 #endif
4231
4232 // Support for java_lang_invoke_MethodHandle
4233
4234 int java_lang_invoke_MethodHandle::_type_offset;
4235 int java_lang_invoke_MethodHandle::_form_offset;
4236
4237 int java_lang_invoke_MemberName::_clazz_offset;
4238 int java_lang_invoke_MemberName::_name_offset;
4239 int java_lang_invoke_MemberName::_type_offset;
4240 int java_lang_invoke_MemberName::_flags_offset;
4241 int java_lang_invoke_MemberName::_method_offset;
4242 int java_lang_invoke_MemberName::_vmindex_offset;
4243
4244 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
4245 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
4246
4247 int java_lang_invoke_LambdaForm::_vmentry_offset;
4248
4249 #define METHODHANDLE_FIELDS_DO(macro) \
4250 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4251 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
4252
4253 void java_lang_invoke_MethodHandle::compute_offsets() {
4254 InstanceKlass* k = vmClasses::MethodHandle_klass();
4255 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4256 }
4257
4258 #if INCLUDE_CDS
4259 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4260 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4261 }
4262 #endif
4263
4264 #define MEMBERNAME_FIELDS_DO(macro) \
4265 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4266 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4267 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
4268 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
4269 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
4270
4271 void java_lang_invoke_MemberName::compute_offsets() {
4272 InstanceKlass* k = vmClasses::MemberName_klass();
4273 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4274 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4275 }
4276
4277 #if INCLUDE_CDS
4278 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4279 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4280 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4281 }
4282 #endif
4283
4284 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4285 macro(_vmholder_offset, k, "vmholder", class_signature, false)
4286
4287 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4288 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4289 assert(k != nullptr, "jdk mismatch");
4290 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4291 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4292 }
4293
4294 #if INCLUDE_CDS
4295 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4296 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4297 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4298 }
4299 #endif
4300
4301 #define LAMBDAFORM_FIELDS_DO(macro) \
4302 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4303
4304 void java_lang_invoke_LambdaForm::compute_offsets() {
4305 InstanceKlass* k = vmClasses::LambdaForm_klass();
4306 assert (k != nullptr, "jdk mismatch");
4307 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4308 }
4309
4310 #if INCLUDE_CDS
4311 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4312 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4313 }
4314 #endif
4315
4316 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4317 return obj != nullptr && is_subclass(obj->klass());
4318 }
4319
4320 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4321 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4322
4323 #define NEP_FIELDS_DO(macro) \
4324 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
4325 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4326
4327 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4328 return obj != nullptr && is_subclass(obj->klass());
4329 }
4330
4331 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4332 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4333 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4334 }
4335
4336 #if INCLUDE_CDS
4337 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4338 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4339 }
4340 #endif
4341
4342 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4343 return entry->obj_field(_method_type_offset);
4344 }
4345
4346 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4347 return entry->long_field(_downcall_stub_address_offset);
4348 }
4349
4350 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4351 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4352 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4353 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4354 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4355 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4356 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4357
4358 #define ABIDescriptor_FIELDS_DO(macro) \
4359 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4360 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4361 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4362 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4363 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4364 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4365 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4366
4367 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4368 return obj != nullptr && is_subclass(obj->klass());
4369 }
4370
4371 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4372 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4373 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4374 }
4375
4376 #if INCLUDE_CDS
4377 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4378 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4379 }
4380 #endif
4381
4382 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4383 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4384 }
4385
4386 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4387 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4388 }
4389
4390 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4391 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4392 }
4393
4394 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4395 return entry->int_field(_stackAlignment_offset);
4396 }
4397
4398 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4399 return entry->int_field(_shadowSpace_offset);
4400 }
4401
4402 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4403 return entry->obj_field(_scratch1_offset);
4404 }
4405
4406 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4407 return entry->obj_field(_scratch2_offset);
4408 }
4409
4410 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4411 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4412 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4413 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4414
4415 #define VMStorage_FIELDS_DO(macro) \
4416 macro(_type_offset, k, "type", byte_signature, false); \
4417 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4418 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4419 macro(_debugName_offset, k, "debugName", string_signature, false); \
4420
4421 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4422 return obj != nullptr && is_subclass(obj->klass());
4423 }
4424
4425 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4426 InstanceKlass* k = vmClasses::VMStorage_klass();
4427 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4428 }
4429
4430 #if INCLUDE_CDS
4431 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4432 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4433 }
4434 #endif
4435
4436 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4437 return entry->byte_field(_type_offset);
4438 }
4439
4440 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4441 return entry->int_field(_indexOrOffset_offset);
4442 }
4443
4444 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4445 return entry->short_field(_segmentMaskOrSize_offset);
4446 }
4447
4448 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4449 return entry->obj_field(_debugName_offset);
4450 }
4451
4452 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4453 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4454
4455 #define CallConv_FIELDS_DO(macro) \
4456 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4457 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4458
4459 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4460 return obj != nullptr && is_subclass(obj->klass());
4461 }
4462
4463 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4464 InstanceKlass* k = vmClasses::CallConv_klass();
4465 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4466 }
4467
4468 #if INCLUDE_CDS
4469 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4470 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4471 }
4472 #endif
4473
4474 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4475 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4476 }
4477
4478 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4479 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4480 }
4481
4482 oop java_lang_invoke_MethodHandle::type(oop mh) {
4483 return mh->obj_field(_type_offset);
4484 }
4485
4486 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4487 mh->obj_field_put(_type_offset, mtype);
4488 }
4489
4490 oop java_lang_invoke_MethodHandle::form(oop mh) {
4491 assert(_form_offset != 0, "");
4492 return mh->obj_field(_form_offset);
4493 }
4494
4495 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4496 assert(_form_offset != 0, "");
4497 mh->obj_field_put(_form_offset, lform);
4498 }
4499
4500 /// MemberName accessors
4501
4502 oop java_lang_invoke_MemberName::clazz(oop mname) {
4503 assert(is_instance(mname), "wrong type");
4504 return mname->obj_field(_clazz_offset);
4505 }
4506
4507 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4508 assert(is_instance(mname), "wrong type");
4509 mname->obj_field_put(_clazz_offset, clazz);
4510 }
4511
4512 oop java_lang_invoke_MemberName::name(oop mname) {
4513 assert(is_instance(mname), "wrong type");
4514 return mname->obj_field(_name_offset);
4515 }
4516
4517 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4518 assert(is_instance(mname), "wrong type");
4519 mname->obj_field_put(_name_offset, name);
4520 }
4521
4522 oop java_lang_invoke_MemberName::type(oop mname) {
4523 assert(is_instance(mname), "wrong type");
4524 return mname->obj_field(_type_offset);
4525 }
4526
4527 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4528 assert(is_instance(mname), "wrong type");
4529 mname->obj_field_put(_type_offset, type);
4530 }
4531
4532 int java_lang_invoke_MemberName::flags(oop mname) {
4533 assert(is_instance(mname), "wrong type");
4534 return mname->int_field(_flags_offset);
4535 }
4536
4537 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4538 assert(is_instance(mname), "wrong type");
4539 mname->int_field_put(_flags_offset, flags);
4540 }
4541
4542
4543 // Return vmtarget from ResolvedMethodName method field through indirection
4544 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4545 assert(is_instance(mname), "wrong type");
4546 oop method = mname->obj_field(_method_offset);
4547 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4548 }
4549
4550 bool java_lang_invoke_MemberName::is_method(oop mname) {
4551 assert(is_instance(mname), "must be MemberName");
4552 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
4553 }
4554
4555 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4556 assert(is_instance(mname), "wrong type");
4557 mname->obj_field_put(_method_offset, resolved_method);
4558 }
4559
4560 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4561 assert(is_instance(mname), "wrong type");
4562 return (intptr_t) mname->address_field(_vmindex_offset);
4563 }
4564
4565 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4566 assert(is_instance(mname), "wrong type");
4567 mname->address_field_put(_vmindex_offset, (address) index);
4568 }
4569
4570
4571 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4572 assert(is_instance(resolved_method), "wrong type");
4573 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4574 assert(m->is_method(), "must be");
4575 return m;
4576 }
4577
4578 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4579 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4580 assert(is_instance(resolved_method), "wrong type");
4581 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4582 }
4583
4584 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4585 assert(is_instance(resolved_method), "wrong type");
4586 resolved_method->obj_field_put(_vmholder_offset, holder);
4587 }
4588
4589 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4590 const Method* method = m();
4591
4592 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4593 oop resolved_method = ResolvedMethodTable::find_method(method);
4594 if (resolved_method != nullptr) {
4595 return resolved_method;
4596 }
4597
4598 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4599 if (!k->is_initialized()) {
4600 k->initialize(CHECK_NULL);
4601 }
4602
4603 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4604
4605 NoSafepointVerifier nsv;
4606
4607 if (method->is_old()) {
4608 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4609 method->get_new_method();
4610 }
4611
4612 InstanceKlass* holder = method->method_holder();
4613
4614 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4615 // Add a reference to the loader (actually mirror because hidden classes may not have
4616 // distinct loaders) to ensure the metadata is kept alive.
4617 // This mirror may be different than the one in clazz field.
4618 set_vmholder(new_resolved_method, holder->java_mirror());
4619
4620 // Set flag in class to indicate this InstanceKlass has entries in the table
4621 // to avoid walking table during redefinition if none of the redefined classes
4622 // have any membernames in the table.
4623 holder->set_has_resolved_methods();
4624
4625 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4626 }
4627
4628 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4629 assert(is_instance(lform), "wrong type");
4630 return lform->obj_field(_vmentry_offset);
4631 }
4632
4633
4634 // Support for java_lang_invoke_MethodType
4635
4636 int java_lang_invoke_MethodType::_rtype_offset;
4637 int java_lang_invoke_MethodType::_ptypes_offset;
4638
4639 #define METHODTYPE_FIELDS_DO(macro) \
4640 macro(_rtype_offset, k, "rtype", class_signature, false); \
4641 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4642
4643 void java_lang_invoke_MethodType::compute_offsets() {
4644 InstanceKlass* k = vmClasses::MethodType_klass();
4645 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4646 }
4647
4648 #if INCLUDE_CDS
4649 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4650 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4651 }
4652 #endif
4653
4654 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4655 st->print("(");
4656 objArrayOop pts = ptypes(mt);
4657 if (pts != nullptr) {
4658 for (int i = 0, limit = pts->length(); i < limit; i++) {
4659 java_lang_Class::print_signature(pts->obj_at(i), st);
4660 }
4661 } else {
4662 st->print("null");
4663 }
4664 st->print(")");
4665 oop rt = rtype(mt);
4666 if (rt != nullptr) {
4667 java_lang_Class::print_signature(rt, st);
4668 } else {
4669 st->print("null");
4670 }
4671 }
4672
4673 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4674 ResourceMark rm;
4675 stringStream buffer(128);
4676 print_signature(mt, &buffer);
4677 const char* sigstr = buffer.base();
4678 int siglen = (int) buffer.size();
4679 Symbol *name;
4680 if (!intern_if_not_found) {
4681 name = SymbolTable::probe(sigstr, siglen);
4682 } else {
4683 name = SymbolTable::new_symbol(sigstr, siglen);
4684 }
4685 return name;
4686 }
4687
4688 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4689 if (mt1 == mt2)
4690 return true;
4691 if (rtype(mt1) != rtype(mt2))
4692 return false;
4693 if (ptype_count(mt1) != ptype_count(mt2))
4694 return false;
4695 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4696 if (ptype(mt1, i) != ptype(mt2, i))
4697 return false;
4698 }
4699 return true;
4700 }
4701
4702 oop java_lang_invoke_MethodType::rtype(oop mt) {
4703 assert(is_instance(mt), "must be a MethodType");
4704 return mt->obj_field(_rtype_offset);
4705 }
4706
4707 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4708 assert(is_instance(mt), "must be a MethodType");
4709 return (objArrayOop) mt->obj_field(_ptypes_offset);
4710 }
4711
4712 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4713 return ptypes(mt)->obj_at(idx);
4714 }
4715
4716 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4717 return ptypes(mt)->length();
4718 }
4719
4720 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4721 objArrayOop pts = ptypes(mt);
4722 int count = pts->length();
4723 int slots = 0;
4724 for (int i = 0; i < count; i++) {
4725 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4726 slots += type2size[bt];
4727 }
4728 return slots;
4729 }
4730
4731 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4732 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4733 return type2size[bt];
4734 }
4735
4736
4737 // Support for java_lang_invoke_CallSite
4738
4739 int java_lang_invoke_CallSite::_target_offset;
4740 int java_lang_invoke_CallSite::_vmdependencies_offset;
4741 int java_lang_invoke_CallSite::_last_cleanup_offset;
4742
4743 #define CALLSITE_FIELDS_DO(macro) \
4744 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
4745
4746 void java_lang_invoke_CallSite::compute_offsets() {
4747 InstanceKlass* k = vmClasses::CallSite_klass();
4748 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4749 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4750 }
4751
4752 #if INCLUDE_CDS
4753 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4754 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4755 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4756 }
4757 #endif
4758
4759 DependencyContext java_lang_invoke_CallSite::vmdependencies(oop call_site) {
4760 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4761 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4762 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4763 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4764 return dep_ctx;
4765 }
4766
4767 // Support for java_lang_invoke_ConstantCallSite
4768
4769 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4770
4771 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4772 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4773
4774 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4775 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4776 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4777 }
4778
4779 #if INCLUDE_CDS
4780 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4781 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4782 }
4783 #endif
4784
4785 // Support for java_lang_ClassLoader
4786
4787 int java_lang_ClassLoader::_loader_data_offset;
4788 int java_lang_ClassLoader::_parallelCapable_offset;
4789 int java_lang_ClassLoader::_name_offset;
4790 int java_lang_ClassLoader::_nameAndId_offset;
4791 int java_lang_ClassLoader::_unnamedModule_offset;
4792 int java_lang_ClassLoader::_parent_offset;
4793
4794 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4795 assert(loader != nullptr, "loader must not be null");
4796 assert(oopDesc::is_oop(loader), "loader must be oop");
4797 return AtomicAccess::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4798 }
4799
4800 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4801 assert(loader != nullptr, "loader must not be null");
4802 assert(oopDesc::is_oop(loader), "loader must be oop");
4803 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4804 }
4805
4806 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4807 assert(loader != nullptr, "loader must not be null");
4808 assert(oopDesc::is_oop(loader), "loader must be oop");
4809 AtomicAccess::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4810 }
4811
4812 #define CLASSLOADER_FIELDS_DO(macro) \
4813 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4814 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4815 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
4816 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4817 macro(_parent_offset, k1, "parent", classloader_signature, false)
4818
4819 void java_lang_ClassLoader::compute_offsets() {
4820 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4821 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4822
4823 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4824 }
4825
4826 #if INCLUDE_CDS
4827 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4828 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4829 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4830 }
4831 #endif
4832
4833 oop java_lang_ClassLoader::parent(oop loader) {
4834 assert(is_instance(loader), "loader must be oop");
4835 return loader->obj_field(_parent_offset);
4836 }
4837
4838 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4839 assert(is_instance(loader), "loader must be oop");
4840 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4841 }
4842
4843 // Returns the name field of this class loader. If the name field has not
4844 // been set, null will be returned.
4845 oop java_lang_ClassLoader::name(oop loader) {
4846 assert(is_instance(loader), "loader must be oop");
4847 return loader->obj_field(_name_offset);
4848 }
4849
4850 // Returns the nameAndId field of this class loader. The format is
4851 // as follows:
4852 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4853 // If the defining loader has no name then <qualified-class-name> @<id>
4854 // If built-in loader, then omit '@<id>' as there is only one instance.
4855 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4856 oop java_lang_ClassLoader::nameAndId(oop loader) {
4857 assert(is_instance(loader), "loader must be oop");
4858 return loader->obj_field(_nameAndId_offset);
4859 }
4860
4861 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4862 assert(is_instance(loader), "loader must be oop");
4863 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4864 oop acl = loader;
4865 DEBUG_ONLY(jint loop_count = 0);
4866 // This loop taken verbatim from ClassLoader.java:
4867 do {
4868 acl = parent(acl);
4869 if (cl == acl) {
4870 return true;
4871 }
4872 assert(++loop_count > 0, "loop_count overflow");
4873 } while (acl != nullptr);
4874 return false;
4875 }
4876
4877 bool java_lang_ClassLoader::is_instance(oop obj) {
4878 return obj != nullptr && is_subclass(obj->klass());
4879 }
4880
4881
4882 // For class loader classes, parallelCapable defined
4883 // based on non-null field
4884 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4885 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4886 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4887 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4888 }
4889
4890 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4891 oop cl = SystemDictionary::java_system_loader();
4892 while(cl != nullptr) {
4893 if (cl == loader) return true;
4894 cl = parent(cl);
4895 }
4896 return false;
4897 }
4898
4899 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4900 assert(is_instance(loader), "loader must be oop");
4901 return loader->obj_field(_unnamedModule_offset);
4902 }
4903
4904 // Support for java_lang_System
4905 //
4906
4907 int java_lang_System::_static_in_offset;
4908 int java_lang_System::_static_out_offset;
4909 int java_lang_System::_static_err_offset;
4910
4911 #define SYSTEM_FIELDS_DO(macro) \
4912 macro(_static_in_offset, k, "in", input_stream_signature, true); \
4913 macro(_static_out_offset, k, "out", print_stream_signature, true); \
4914 macro(_static_err_offset, k, "err", print_stream_signature, true);
4915
4916 void java_lang_System::compute_offsets() {
4917 InstanceKlass* k = vmClasses::System_klass();
4918 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4919 }
4920
4921 #if INCLUDE_CDS
4922 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4923 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4924 }
4925 #endif
4926
4927 // Support for jdk_internal_misc_UnsafeConstants
4928 //
4929 class UnsafeConstantsFixup : public FieldClosure {
4930 private:
4931 int _address_size;
4932 int _page_size;
4933 bool _big_endian;
4934 bool _use_unaligned_access;
4935 int _data_cache_line_flush_size;
4936 public:
4937 UnsafeConstantsFixup() {
4938 // round up values for all static final fields
4939 _address_size = sizeof(void*);
4940 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4941 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4942 _use_unaligned_access = UseUnalignedAccesses;
4943 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4944 }
4945
4946 void do_field(fieldDescriptor* fd) {
4947 oop mirror = fd->field_holder()->java_mirror();
4948 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4949 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4950 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4951 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4952 if (fd->name() == vmSymbols::address_size_name()) {
4953 mirror->int_field_put(fd->offset(), _address_size);
4954 } else if (fd->name() == vmSymbols::page_size_name()) {
4955 mirror->int_field_put(fd->offset(), _page_size);
4956 } else if (fd->name() == vmSymbols::big_endian_name()) {
4957 mirror->bool_field_put(fd->offset(), _big_endian);
4958 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4959 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4960 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4961 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4962 } else {
4963 assert(false, "unexpected UnsafeConstants field");
4964 }
4965 }
4966 };
4967
4968 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4969 UnsafeConstantsFixup fixup;
4970 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4971 }
4972
4973
4974 // java_lang_StackTraceElement
4975
4976 int java_lang_StackTraceElement::_methodName_offset;
4977 int java_lang_StackTraceElement::_fileName_offset;
4978 int java_lang_StackTraceElement::_lineNumber_offset;
4979 int java_lang_StackTraceElement::_moduleName_offset;
4980 int java_lang_StackTraceElement::_moduleVersion_offset;
4981 int java_lang_StackTraceElement::_classLoaderName_offset;
4982 int java_lang_StackTraceElement::_declaringClass_offset;
4983 int java_lang_StackTraceElement::_declaringClassObject_offset;
4984
4985 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4986 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4987 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4988 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
4989 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4990 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
4991 macro(_methodName_offset, k, "methodName", string_signature, false); \
4992 macro(_fileName_offset, k, "fileName", string_signature, false); \
4993 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
4994
4995 // Support for java_lang_StackTraceElement
4996 void java_lang_StackTraceElement::compute_offsets() {
4997 InstanceKlass* k = vmClasses::StackTraceElement_klass();
4998 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4999 }
5000
5001 #if INCLUDE_CDS
5002 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
5003 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5004 }
5005 #endif
5006
5007 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
5008 element->obj_field_put(_fileName_offset, value);
5009 }
5010
5011 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
5012 element->obj_field_put(_declaringClass_offset, value);
5013 }
5014
5015 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
5016 element->obj_field_put(_methodName_offset, value);
5017 }
5018
5019 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
5020 element->int_field_put(_lineNumber_offset, value);
5021 }
5022
5023 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
5024 element->obj_field_put(_moduleName_offset, value);
5025 }
5026
5027 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
5028 element->obj_field_put(_moduleVersion_offset, value);
5029 }
5030
5031 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
5032 element->obj_field_put(_classLoaderName_offset, value);
5033 }
5034
5035 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
5036 element->obj_field_put(_declaringClassObject_offset, value);
5037 }
5038
5039
5040 // java_lang_AssertionStatusDirectives
5041
5042 int java_lang_AssertionStatusDirectives::_classes_offset;
5043 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
5044 int java_lang_AssertionStatusDirectives::_packages_offset;
5045 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
5046 int java_lang_AssertionStatusDirectives::_deflt_offset;
5047
5048 // Support for java Assertions - java_lang_AssertionStatusDirectives.
5049 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
5050 macro(_classes_offset, k, "classes", string_array_signature, false); \
5051 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
5052 macro(_packages_offset, k, "packages", string_array_signature, false); \
5053 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
5054 macro(_deflt_offset, k, "deflt", bool_signature, false)
5055
5056 void java_lang_AssertionStatusDirectives::compute_offsets() {
5057 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
5058 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5059 }
5060
5061 #if INCLUDE_CDS
5062 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
5063 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5064 }
5065 #endif
5066
5067 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
5068 o->obj_field_put(_classes_offset, val);
5069 }
5070
5071 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
5072 o->obj_field_put(_classEnabled_offset, val);
5073 }
5074
5075 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
5076 o->obj_field_put(_packages_offset, val);
5077 }
5078
5079 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
5080 o->obj_field_put(_packageEnabled_offset, val);
5081 }
5082
5083 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
5084 o->bool_field_put(_deflt_offset, val);
5085 }
5086
5087 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
5088
5089 #define AOS_FIELDS_DO(macro) \
5090 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
5091
5092 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
5093 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
5094 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5095 }
5096
5097 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
5098 assert(_owner_offset != 0, "Must be initialized");
5099 return obj->obj_field(_owner_offset);
5100 }
5101
5102 #if INCLUDE_CDS
5103 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
5104 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5105 }
5106 #endif
5107
5108 int vector_VectorPayload::_payload_offset;
5109
5110 #define VECTORPAYLOAD_FIELDS_DO(macro) \
5111 macro(_payload_offset, k, "payload", object_signature, false)
5112
5113 void vector_VectorPayload::compute_offsets() {
5114 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
5115 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5116 }
5117
5118 #if INCLUDE_CDS
5119 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
5120 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5121 }
5122 #endif
5123
5124 void vector_VectorPayload::set_payload(oop o, oop val) {
5125 o->obj_field_put(_payload_offset, val);
5126 }
5127
5128 bool vector_VectorPayload::is_instance(oop obj) {
5129 return obj != nullptr && is_subclass(obj->klass());
5130 }
5131
5132 int java_lang_Integer_IntegerCache::_static_cache_offset;
5133 int java_lang_Long_LongCache::_static_cache_offset;
5134 int java_lang_Character_CharacterCache::_static_cache_offset;
5135 int java_lang_Short_ShortCache::_static_cache_offset;
5136 int java_lang_Byte_ByteCache::_static_cache_offset;
5137
5138 #define INTEGER_CACHE_FIELDS_DO(macro) \
5139 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5140
5141 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5142 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5143 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5144 }
5145
5146 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5147 oop base = ik->static_field_base_raw();
5148 return objArrayOop(base->obj_field(_static_cache_offset));
5149 }
5150
5151 Symbol* java_lang_Integer_IntegerCache::symbol() {
5152 return vmSymbols::java_lang_Integer_IntegerCache();
5153 }
5154
5155 #if INCLUDE_CDS
5156 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5157 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5158 }
5159 #endif
5160 #undef INTEGER_CACHE_FIELDS_DO
5161
5162 jint java_lang_Integer::value(oop obj) {
5163 jvalue v;
5164 java_lang_boxing_object::get_value(obj, &v);
5165 return v.i;
5166 }
5167
5168 #define LONG_CACHE_FIELDS_DO(macro) \
5169 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5170
5171 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5172 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5173 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5174 }
5175
5176 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5177 oop base = ik->static_field_base_raw();
5178 return objArrayOop(base->obj_field(_static_cache_offset));
5179 }
5180
5181 Symbol* java_lang_Long_LongCache::symbol() {
5182 return vmSymbols::java_lang_Long_LongCache();
5183 }
5184
5185 #if INCLUDE_CDS
5186 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5187 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5188 }
5189 #endif
5190 #undef LONG_CACHE_FIELDS_DO
5191
5192 jlong java_lang_Long::value(oop obj) {
5193 jvalue v;
5194 java_lang_boxing_object::get_value(obj, &v);
5195 return v.j;
5196 }
5197
5198 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5199 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5200
5201 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5202 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5203 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5204 }
5205
5206 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5207 oop base = ik->static_field_base_raw();
5208 return objArrayOop(base->obj_field(_static_cache_offset));
5209 }
5210
5211 Symbol* java_lang_Character_CharacterCache::symbol() {
5212 return vmSymbols::java_lang_Character_CharacterCache();
5213 }
5214
5215 #if INCLUDE_CDS
5216 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5217 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5218 }
5219 #endif
5220 #undef CHARACTER_CACHE_FIELDS_DO
5221
5222 jchar java_lang_Character::value(oop obj) {
5223 jvalue v;
5224 java_lang_boxing_object::get_value(obj, &v);
5225 return v.c;
5226 }
5227
5228 #define SHORT_CACHE_FIELDS_DO(macro) \
5229 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5230
5231 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5232 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5233 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5234 }
5235
5236 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5237 oop base = ik->static_field_base_raw();
5238 return objArrayOop(base->obj_field(_static_cache_offset));
5239 }
5240
5241 Symbol* java_lang_Short_ShortCache::symbol() {
5242 return vmSymbols::java_lang_Short_ShortCache();
5243 }
5244
5245 #if INCLUDE_CDS
5246 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5247 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5248 }
5249 #endif
5250 #undef SHORT_CACHE_FIELDS_DO
5251
5252 jshort java_lang_Short::value(oop obj) {
5253 jvalue v;
5254 java_lang_boxing_object::get_value(obj, &v);
5255 return v.s;
5256 }
5257
5258 #define BYTE_CACHE_FIELDS_DO(macro) \
5259 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5260
5261 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5262 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5263 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5264 }
5265
5266 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5267 oop base = ik->static_field_base_raw();
5268 return objArrayOop(base->obj_field(_static_cache_offset));
5269 }
5270
5271 Symbol* java_lang_Byte_ByteCache::symbol() {
5272 return vmSymbols::java_lang_Byte_ByteCache();
5273 }
5274
5275 #if INCLUDE_CDS
5276 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5277 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5278 }
5279 #endif
5280 #undef BYTE_CACHE_FIELDS_DO
5281
5282 jbyte java_lang_Byte::value(oop obj) {
5283 jvalue v;
5284 java_lang_boxing_object::get_value(obj, &v);
5285 return v.b;
5286 }
5287
5288 int java_lang_Boolean::_static_TRUE_offset;
5289 int java_lang_Boolean::_static_FALSE_offset;
5290
5291 #define BOOLEAN_FIELDS_DO(macro) \
5292 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5293 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5294
5295
5296 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5297 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5298 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5299 }
5300
5301 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5302 oop base = ik->static_field_base_raw();
5303 return base->obj_field(_static_TRUE_offset);
5304 }
5305
5306 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5307 oop base = ik->static_field_base_raw();
5308 return base->obj_field(_static_FALSE_offset);
5309 }
5310
5311 Symbol* java_lang_Boolean::symbol() {
5312 return vmSymbols::java_lang_Boolean();
5313 }
5314
5315 #if INCLUDE_CDS
5316 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5317 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5318 }
5319 #endif
5320 #undef BOOLEAN_CACHE_FIELDS_DO
5321
5322 jboolean java_lang_Boolean::value(oop obj) {
5323 jvalue v;
5324 java_lang_boxing_object::get_value(obj, &v);
5325 return v.z;
5326 }
5327
5328 // java_lang_reflect_RecordComponent
5329
5330 int java_lang_reflect_RecordComponent::_clazz_offset;
5331 int java_lang_reflect_RecordComponent::_name_offset;
5332 int java_lang_reflect_RecordComponent::_type_offset;
5333 int java_lang_reflect_RecordComponent::_accessor_offset;
5334 int java_lang_reflect_RecordComponent::_signature_offset;
5335 int java_lang_reflect_RecordComponent::_annotations_offset;
5336 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5337
5338 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5339 macro(_clazz_offset, k, "clazz", class_signature, false); \
5340 macro(_name_offset, k, "name", string_signature, false); \
5341 macro(_type_offset, k, "type", class_signature, false); \
5342 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5343 macro(_signature_offset, k, "signature", string_signature, false); \
5344 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5345 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5346
5347 // Support for java_lang_reflect_RecordComponent
5348 void java_lang_reflect_RecordComponent::compute_offsets() {
5349 InstanceKlass* k = vmClasses::RecordComponent_klass();
5350 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5351 }
5352
5353 #if INCLUDE_CDS
5354 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5355 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5356 }
5357 #endif
5358
5359 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5360 element->obj_field_put(_clazz_offset, value);
5361 }
5362
5363 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5364 element->obj_field_put(_name_offset, value);
5365 }
5366
5367 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5368 element->obj_field_put(_type_offset, value);
5369 }
5370
5371 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5372 element->obj_field_put(_accessor_offset, value);
5373 }
5374
5375 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5376 element->obj_field_put(_signature_offset, value);
5377 }
5378
5379 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5380 element->obj_field_put(_annotations_offset, value);
5381 }
5382
5383 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5384 element->obj_field_put(_typeAnnotations_offset, value);
5385 }
5386
5387 // java_lang_InternalError
5388 int java_lang_InternalError::_during_unsafe_access_offset;
5389
5390 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5391 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5392 }
5393
5394 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5395 return internal_error->bool_field(_during_unsafe_access_offset);
5396 }
5397
5398 void java_lang_InternalError::compute_offsets() {
5399 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5400 }
5401
5402 #if INCLUDE_CDS
5403 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5404 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5405 }
5406 #endif
5407
5408 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5409 f(java_lang_Class) \
5410 f(java_lang_String) \
5411 f(java_lang_ref_Reference) \
5412 //end
5413
5414 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5415 f(java_lang_System) \
5416 f(java_lang_ClassLoader) \
5417 f(java_lang_Throwable) \
5418 f(java_lang_Thread) \
5419 f(java_lang_Thread_FieldHolder) \
5420 f(java_lang_Thread_Constants) \
5421 f(java_lang_ThreadGroup) \
5422 f(java_lang_VirtualThread) \
5423 f(java_lang_InternalError) \
5424 f(java_lang_AssertionStatusDirectives) \
5425 f(java_lang_ref_SoftReference) \
5426 f(java_lang_invoke_MethodHandle) \
5427 f(java_lang_invoke_DirectMethodHandle) \
5428 f(java_lang_invoke_MemberName) \
5429 f(java_lang_invoke_ResolvedMethodName) \
5430 f(java_lang_invoke_LambdaForm) \
5431 f(java_lang_invoke_MethodType) \
5432 f(java_lang_invoke_CallSite) \
5433 f(java_lang_invoke_ConstantCallSite) \
5434 f(java_lang_reflect_AccessibleObject) \
5435 f(java_lang_reflect_Method) \
5436 f(java_lang_reflect_Constructor) \
5437 f(java_lang_reflect_Field) \
5438 f(java_lang_reflect_RecordComponent) \
5439 f(reflect_ConstantPool) \
5440 f(java_lang_reflect_Parameter) \
5441 f(java_lang_Module) \
5442 f(java_lang_StackTraceElement) \
5443 f(java_lang_ClassFrameInfo) \
5444 f(java_lang_StackFrameInfo) \
5445 f(java_lang_LiveStackFrameInfo) \
5446 f(jdk_internal_vm_ContinuationScope) \
5447 f(jdk_internal_vm_Continuation) \
5448 f(jdk_internal_vm_StackChunk) \
5449 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5450 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5451 f(jdk_internal_foreign_abi_ABIDescriptor) \
5452 f(jdk_internal_foreign_abi_VMStorage) \
5453 f(jdk_internal_foreign_abi_CallConv) \
5454 f(jdk_internal_misc_UnsafeConstants) \
5455 f(java_lang_boxing_object) \
5456 f(vector_VectorPayload) \
5457 //end
5458
5459 #define BASIC_JAVA_CLASSES_DO(f) \
5460 BASIC_JAVA_CLASSES_DO_PART1(f) \
5461 BASIC_JAVA_CLASSES_DO_PART2(f)
5462
5463 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5464
5465 // Compute field offsets of all the classes in this file
5466 void JavaClasses::compute_offsets() {
5467 if (CDSConfig::is_using_archive()) {
5468 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5469 JvmtiExport::has_early_class_hook_env()),
5470 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5471 // None of the classes used by the rest of this function can be replaced by
5472 // JVMTI ClassFileLoadHook.
5473 // We are safe to use the archived offsets, which have already been restored
5474 // by JavaClasses::serialize_offsets, without computing the offsets again.
5475 return;
5476 }
5477
5478 // We have already called the compute_offsets() of the
5479 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5480 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5481 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5482 }
5483
5484 #if INCLUDE_CDS
5485 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5486
5487 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5488 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5489 }
5490 #endif
5491
5492 #if INCLUDE_CDS_JAVA_HEAP
5493 bool JavaClasses::is_supported_for_archiving(oop obj) {
5494 Klass* klass = obj->klass();
5495
5496 if (!CDSConfig::is_dumping_method_handles()) {
5497 // These are supported by CDS only when CDSConfig::is_dumping_method_handles() is enabled.
5498 if (klass == vmClasses::ResolvedMethodName_klass() ||
5499 klass == vmClasses::MemberName_klass()) {
5500 return false;
5501 }
5502 }
5503
5504 if (!AOTReferenceObjSupport::is_enabled() && klass->is_subclass_of(vmClasses::Reference_klass())) {
5505 return false;
5506 }
5507
5508 return true;
5509 }
5510 #endif
5511
5512 #ifndef PRODUCT
5513
5514 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5515
5516 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5517 const char* field_sig) {
5518 EXCEPTION_MARK;
5519 fieldDescriptor fd;
5520 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5521 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5522 InstanceKlass* ik = InstanceKlass::cast(k);
5523 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5524 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5525 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5526 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5527 return false;
5528 }
5529 if (fd.is_static()) {
5530 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5531 return false;
5532 }
5533 if (fd.offset() == deserialized_offset ) {
5534 return true;
5535 } else {
5536 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5537 klass_name, field_name, deserialized_offset, fd.offset());
5538 return false;
5539 }
5540 }
5541
5542 void JavaClasses::check_offsets() {
5543 bool valid = true;
5544
5545 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5546 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5547
5548 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5549 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5550
5551 // Boxed primitive objects (java_lang_boxing_object)
5552
5553 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
5554 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5555 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
5556 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5557 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
5558 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
5559 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
5560 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5561
5562 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5563 }
5564
5565 #endif // PRODUCT
5566
5567 int InjectedField::compute_offset() {
5568 InstanceKlass* ik = klass();
5569 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5570 if (!may_be_java && !fs.field_flags().is_injected()) {
5571 // Only look at injected fields
5572 continue;
5573 }
5574 if (fs.name() == name() && fs.signature() == signature()) {
5575 return fs.offset();
5576 }
5577 }
5578 ResourceMark rm;
5579 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)" : "");
5580 #ifndef PRODUCT
5581 ik->print();
5582 tty->print_cr("all fields:");
5583 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5584 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());
5585 }
5586 #endif //PRODUCT
5587 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5588 return -1;
5589 }
5590
5591 void javaClasses_init() {
5592 JavaClasses::compute_offsets();
5593 JavaClasses::check_offsets();
5594 }