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