1 /*
2 * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "cds/aotReferenceObjSupport.hpp"
26 #include "cds/archiveBuilder.hpp"
27 #include "cds/archiveHeapLoader.hpp"
28 #include "cds/cdsConfig.hpp"
29 #include "cds/heapShared.hpp"
30 #include "cds/metaspaceShared.hpp"
31 #include "classfile/altHashing.hpp"
32 #include "classfile/classLoaderData.inline.hpp"
33 #include "classfile/javaClasses.inline.hpp"
34 #include "classfile/javaClassesImpl.hpp"
35 #include "classfile/javaThreadStatus.hpp"
36 #include "classfile/moduleEntry.hpp"
37 #include "classfile/stringTable.hpp"
38 #include "classfile/symbolTable.hpp"
39 #include "classfile/systemDictionary.hpp"
40 #include "classfile/vmClasses.hpp"
41 #include "classfile/vmSymbols.hpp"
42 #include "code/debugInfo.hpp"
43 #include "code/dependencyContext.hpp"
44 #include "code/pcDesc.hpp"
45 #include "gc/shared/collectedHeap.inline.hpp"
46 #include "interpreter/interpreter.hpp"
47 #include "interpreter/linkResolver.hpp"
48 #include "jvm.h"
49 #include "logging/log.hpp"
50 #include "logging/logStream.hpp"
51 #include "memory/oopFactory.hpp"
52 #include "memory/resourceArea.hpp"
53 #include "memory/universe.hpp"
54 #include "oops/fieldInfo.hpp"
55 #include "oops/fieldStreams.inline.hpp"
56 #include "oops/flatArrayKlass.hpp"
57 #include "oops/inlineKlass.inline.hpp"
58 #include "oops/instanceKlass.inline.hpp"
59 #include "oops/instanceMirrorKlass.inline.hpp"
60 #include "oops/klass.hpp"
61 #include "oops/klass.inline.hpp"
62 #include "oops/method.inline.hpp"
63 #include "oops/objArrayKlass.hpp"
64 #include "oops/objArrayOop.inline.hpp"
65 #include "oops/oopCast.inline.hpp"
66 #include "oops/oop.inline.hpp"
67 #include "oops/symbol.hpp"
68 #include "oops/recordComponent.hpp"
69 #include "oops/typeArrayOop.inline.hpp"
70 #include "prims/jvmtiExport.hpp"
71 #include "prims/methodHandles.hpp"
72 #include "prims/resolvedMethodTable.hpp"
73 #include "runtime/continuationEntry.inline.hpp"
74 #include "runtime/continuationJavaClasses.inline.hpp"
75 #include "runtime/fieldDescriptor.inline.hpp"
76 #include "runtime/frame.inline.hpp"
77 #include "runtime/handles.inline.hpp"
78 #include "runtime/handshake.hpp"
79 #include "runtime/init.hpp"
80 #include "runtime/interfaceSupport.inline.hpp"
81 #include "runtime/java.hpp"
82 #include "runtime/javaCalls.hpp"
83 #include "runtime/javaThread.hpp"
84 #include "runtime/jniHandles.inline.hpp"
85 #include "runtime/reflectionUtils.hpp"
86 #include "runtime/safepoint.hpp"
87 #include "runtime/safepointVerifiers.hpp"
88 #include "runtime/threadSMR.hpp"
89 #include "runtime/vframe.inline.hpp"
90 #include "runtime/vm_version.hpp"
91 #include "utilities/align.hpp"
92 #include "utilities/globalDefinitions.hpp"
93 #include "utilities/growableArray.hpp"
94 #include "utilities/preserveException.hpp"
95 #include "utilities/utf8.hpp"
96 #if INCLUDE_JVMCI
97 #include "jvmci/jvmciJavaClasses.hpp"
98 #endif
99
100 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
101 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
102
103 InjectedField JavaClasses::_injected_fields[] = {
104 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
105 };
106
107 // Register native methods of Object
108 void java_lang_Object::register_natives(TRAPS) {
109 InstanceKlass* obj = vmClasses::Object_klass();
110 Method::register_native(obj, vmSymbols::hashCode_name(),
111 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
112 Method::register_native(obj, vmSymbols::wait_name(),
113 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
114 Method::register_native(obj, vmSymbols::notify_name(),
115 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
116 Method::register_native(obj, vmSymbols::notifyAll_name(),
117 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
118 Method::register_native(obj, vmSymbols::clone_name(),
119 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
120 }
121
122 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
123 return _injected_fields[(int)id].compute_offset();
124 }
125
126 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
127 *field_count = 0;
128
129 vmSymbolID sid = vmSymbols::find_sid(class_name);
130 if (sid == vmSymbolID::NO_SID) {
131 // Only well known classes can inject fields
132 return nullptr;
133 }
134
135 int count = 0;
136 int start = -1;
137
138 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
139 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \
140 count++; \
141 if (start == -1) { \
142 start = (int)InjectedFieldID::klass##_##name##_enum; \
143 } \
144 }
145 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
146 #undef LOOKUP_INJECTED_FIELD
147
148 if (start != -1) {
149 *field_count = count;
150 return _injected_fields + start;
151 }
152 return nullptr;
153 }
154
155
156 // Helpful routine for computing field offsets at run time rather than hardcoding them
157 // Finds local fields only, including static fields. Static field offsets are from the
158 // beginning of the mirror.
159 void JavaClasses::compute_offset(int &dest_offset,
160 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
161 bool is_static) {
162 fieldDescriptor fd;
163 if (ik == nullptr) {
164 ResourceMark rm;
165 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
166 vm_exit_during_initialization("Invalid layout of well-known class");
167 }
168
169 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
170 ResourceMark rm;
171 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
172 name_symbol->as_C_string(), signature_symbol->as_C_string());
173 #ifndef PRODUCT
174 // Prints all fields and offsets
175 Log(class) lt;
176 LogStream ls(lt.error());
177 ik->print_on(&ls);
178 #endif //PRODUCT
179 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
180 }
181 dest_offset = fd.offset();
182 }
183
184 // Overloading to pass name as a string.
185 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
186 const char* name_string, Symbol* signature_symbol,
187 bool is_static) {
188 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
189 if (name == nullptr) {
190 ResourceMark rm;
191 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
192 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
193 }
194 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
195 }
196
197 // java_lang_String
198
199 int java_lang_String::_value_offset;
200 int java_lang_String::_hash_offset;
201 int java_lang_String::_hashIsZero_offset;
202 int java_lang_String::_coder_offset;
203 int java_lang_String::_flags_offset;
204
205 bool java_lang_String::_initialized;
206
207
208 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
209 uint8_t* addr = flags_addr(java_string);
210 uint8_t value = Atomic::load(addr);
211 while ((value & flag_mask) == 0) {
212 uint8_t old_value = value;
213 value |= flag_mask;
214 value = Atomic::cmpxchg(addr, old_value, value);
215 if (value == old_value) return false; // Flag bit changed from 0 to 1.
216 }
217 return true; // Flag bit is already 1.
218 }
219
220 #define STRING_FIELDS_DO(macro) \
221 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
222 macro(_hash_offset, k, "hash", int_signature, false); \
223 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
224 macro(_coder_offset, k, "coder", byte_signature, false);
225
226 void java_lang_String::compute_offsets() {
227 if (_initialized) {
228 return;
229 }
230
231 InstanceKlass* k = vmClasses::String_klass();
232 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
233 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
234
235 _initialized = true;
236 }
237
238 #if INCLUDE_CDS
239 void java_lang_String::serialize_offsets(SerializeClosure* f) {
240 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
241 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
242 f->do_bool(&_initialized);
243 }
244 #endif
245
246 class CompactStringsFixup : public FieldClosure {
247 private:
248 bool _value;
249
250 public:
251 CompactStringsFixup(bool value) : _value(value) {}
252
253 void do_field(fieldDescriptor* fd) {
254 if (fd->name() == vmSymbols::compact_strings_name()) {
255 oop mirror = fd->field_holder()->java_mirror();
256 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String");
257 assert(mirror != nullptr, "String must have mirror already");
258 mirror->bool_field_put(fd->offset(), _value);
259 }
260 }
261 };
262
263 void java_lang_String::set_compact_strings(bool value) {
264 CompactStringsFixup fix(value);
265 vmClasses::String_klass()->do_local_static_fields(&fix);
266 }
267
268 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
269 assert(_initialized, "Must be initialized");
270 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
271
272 // Create the String object first, so there's a chance that the String
273 // and the char array it points to end up in the same cache line.
274 oop obj;
275 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH);
276
277 // Create the char array. The String object must be handlized here
278 // because GC can happen as a result of the allocation attempt.
279 Handle h_obj(THREAD, obj);
280 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
281 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
282
283 // Point the String at the char array
284 obj = h_obj();
285 set_value(obj, buffer);
286 // No need to zero the offset, allocation zero'ed the entire String object
287 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
288 return h_obj;
289 }
290
291 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
292 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
293 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
294 typeArrayOop buffer = value(h_obj());
295 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
296 if (is_latin1) {
297 for (int index = 0; index < length; index++) {
298 buffer->byte_at_put(index, (jbyte)unicode[index]);
299 }
300 } else {
301 for (int index = 0; index < length; index++) {
302 buffer->char_at_put(index, unicode[index]);
303 }
304 }
305
306 #ifdef ASSERT
307 {
308 ResourceMark rm;
309 size_t utf8_len = static_cast<size_t>(length);
310 char* expected = UNICODE::as_utf8(unicode, utf8_len);
311 char* actual = as_utf8_string(h_obj());
312 if (strcmp(expected, actual) != 0) {
313 fatal("Unicode conversion failure: %s --> %s", expected, actual);
314 }
315 }
316 #endif
317
318 return h_obj;
319 }
320
321 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
322 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
323 return h_obj();
324 }
325
326 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
327 if (utf8_str == nullptr) {
328 return Handle();
329 }
330 bool has_multibyte, is_latin1;
331 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
332 if (!CompactStrings) {
333 has_multibyte = true;
334 is_latin1 = false;
335 }
336
337 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
338 if (length > 0) {
339 if (!has_multibyte) {
340 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
341 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
342 } else if (is_latin1) {
343 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
344 } else {
345 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
346 }
347 }
348
349 #ifdef ASSERT
350 // This check is too strict when the input string is not a valid UTF8.
351 // For example, it may be created with arbitrary content via jni_NewStringUTF.
352 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, strlen(utf8_str), /*version_leq_47*/false)) {
353 ResourceMark rm;
354 const char* expected = utf8_str;
355 char* actual = as_utf8_string(h_obj());
356 if (strcmp(expected, actual) != 0) {
357 fatal("String conversion failure: %s --> %s", expected, actual);
358 }
359 }
360 #endif
361
362 return h_obj;
363 }
364
365 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
366 Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
367 return h_obj();
368 }
369
370 Handle java_lang_String::create_from_symbol(const Symbol* symbol, TRAPS) {
371 const char* utf8_str = (char*)symbol->bytes();
372 int utf8_len = symbol->utf8_length();
373
374 bool has_multibyte, is_latin1;
375 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
376 if (!CompactStrings) {
377 has_multibyte = true;
378 is_latin1 = false;
379 }
380
381 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
382 if (length > 0) {
383 if (!has_multibyte) {
384 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
385 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
386 } else if (is_latin1) {
387 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
388 } else {
389 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
390 }
391 }
392
393 #ifdef ASSERT
394 // This check is too strict on older classfile versions
395 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, utf8_len, /*version_leq_47*/false))
396 {
397 ResourceMark rm;
398 const char* expected = symbol->as_utf8();
399 char* actual = as_utf8_string(h_obj());
400 if (strncmp(expected, actual, utf8_len) != 0) {
401 fatal("Symbol conversion failure: %s --> %s", expected, actual);
402 }
403 }
404 #endif
405
406 return h_obj;
407 }
408
409 // Converts a C string to a Java String based on current encoding
410 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
411 assert(str != nullptr, "bad arguments");
412
413 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
414 static to_java_string_fn_t _to_java_string_fn = nullptr;
415
416 if (_to_java_string_fn == nullptr) {
417 void *lib_handle = os::native_java_library();
418 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
419 if (_to_java_string_fn == nullptr) {
420 fatal("JNU_NewStringPlatform missing");
421 }
422 }
423
424 jstring js = nullptr;
425 {
426 JavaThread* thread = THREAD;
427 HandleMark hm(thread);
428 ThreadToNativeFromVM ttn(thread);
429 js = (_to_java_string_fn)(thread->jni_environment(), str);
430 }
431
432 Handle native_platform_string(THREAD, JNIHandles::resolve(js));
433 JNIHandles::destroy_local(js); // destroy local JNIHandle.
434 return native_platform_string;
435 }
436
437 // Converts a Java String to a native C string that can be used for
438 // native OS calls.
439 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
440 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
441 static to_platform_string_fn_t _to_platform_string_fn = nullptr;
442
443 if (_to_platform_string_fn == nullptr) {
444 void *lib_handle = os::native_java_library();
445 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
446 if (_to_platform_string_fn == nullptr) {
447 fatal("GetStringPlatformChars missing");
448 }
449 }
450
451 char *native_platform_string;
452 jstring js;
453 { JavaThread* thread = THREAD;
454 js = (jstring) JNIHandles::make_local(thread, java_string());
455 HandleMark hm(thread);
456 ThreadToNativeFromVM ttn(thread);
457 JNIEnv *env = thread->jni_environment();
458 bool is_copy;
459 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
460 assert(is_copy == JNI_TRUE, "is_copy value changed");
461 }
462
463 // Uses a store barrier and therefore needs to be in vm state
464 JNIHandles::destroy_local(js);
465
466 return native_platform_string;
467 }
468
469 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
470 ResourceMark rm(THREAD);
471 return create_from_str(java_name->as_klass_external_name(), THREAD);
472 }
473
474 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
475 jchar* result = as_unicode_string_or_null(java_string, length);
476 if (result == nullptr) {
477 THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
478 }
479 return result;
480 }
481
482 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
483 typeArrayOop value = java_lang_String::value(java_string);
484 length = java_lang_String::length(java_string, value);
485 bool is_latin1 = java_lang_String::is_latin1(java_string);
486
487 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
488 if (result != nullptr) {
489 if (!is_latin1) {
490 for (int index = 0; index < length; index++) {
491 result[index] = value->char_at(index);
492 }
493 } else {
494 for (int index = 0; index < length; index++) {
495 result[index] = ((jchar) value->byte_at(index)) & 0xff;
496 }
497 }
498 }
499 return result;
500 }
501
502 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
503 // The hash and hashIsZero fields are subject to a benign data race,
504 // making it crucial to ensure that any observable result of the
505 // calculation in this method stays correct under any possible read of
506 // these fields. Necessary restrictions to allow this to be correct
507 // without explicit memory fences or similar concurrency primitives is
508 // that we can ever only write to one of these two fields for a given
509 // String instance, and that the computation is idempotent and derived
510 // from immutable state
511 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
512 if (java_lang_String::hash_is_set(java_string)) {
513 return java_string->int_field(_hash_offset);
514 }
515
516 typeArrayOop value = java_lang_String::value(java_string);
517 int length = java_lang_String::length(java_string, value);
518 bool is_latin1 = java_lang_String::is_latin1(java_string);
519
520 unsigned int hash = 0;
521 if (length > 0) {
522 if (is_latin1) {
523 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
524 } else {
525 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
526 }
527 }
528
529 if (update) {
530 if (hash != 0) {
531 java_string->int_field_put(_hash_offset, hash);
532 } else {
533 java_string->bool_field_put(_hashIsZero_offset, true);
534 }
535 }
536 return hash;
537 }
538
539 unsigned int java_lang_String::hash_code(oop java_string) {
540 return hash_code_impl(java_string, /*update=*/true);
541 }
542
543 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
544 return hash_code_impl(java_string, /*update=*/false);
545 }
546
547
548 char* java_lang_String::as_quoted_ascii(oop java_string) {
549 typeArrayOop value = java_lang_String::value(java_string);
550 int length = java_lang_String::length(java_string, value);
551 bool is_latin1 = java_lang_String::is_latin1(java_string);
552
553 if (length == 0) return nullptr;
554
555 char* result;
556 size_t result_length;
557 if (!is_latin1) {
558 jchar* base = value->char_at_addr(0);
559 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
560 result = NEW_RESOURCE_ARRAY(char, result_length);
561 UNICODE::as_quoted_ascii(base, length, result, result_length);
562 } else {
563 jbyte* base = value->byte_at_addr(0);
564 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
565 result = NEW_RESOURCE_ARRAY(char, result_length);
566 UNICODE::as_quoted_ascii(base, length, result, result_length);
567 }
568 assert(result_length >= (size_t)length + 1, "must not be shorter");
569 assert(result_length == strlen(result) + 1, "must match");
570 return result;
571 }
572
573 Symbol* java_lang_String::as_symbol(oop java_string) {
574 typeArrayOop value = java_lang_String::value(java_string);
575 int length = java_lang_String::length(java_string, value);
576 bool is_latin1 = java_lang_String::is_latin1(java_string);
577 if (!is_latin1) {
578 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
579 Symbol* sym = SymbolTable::new_symbol(base, length);
580 return sym;
581 } else {
582 ResourceMark rm;
583 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
584 size_t utf8_len = static_cast<size_t>(length);
585 const char* base = UNICODE::as_utf8(position, utf8_len);
586 Symbol* sym = SymbolTable::new_symbol(base, checked_cast<int>(utf8_len));
587 return sym;
588 }
589 }
590
591 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
592 typeArrayOop value = java_lang_String::value(java_string);
593 int length = java_lang_String::length(java_string, value);
594 bool is_latin1 = java_lang_String::is_latin1(java_string);
595 if (!is_latin1) {
596 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
597 return SymbolTable::probe_unicode(base, length);
598 } else {
599 ResourceMark rm;
600 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
601 size_t utf8_len = static_cast<size_t>(length);
602 const char* base = UNICODE::as_utf8(position, utf8_len);
603 return SymbolTable::probe(base, checked_cast<int>(utf8_len));
604 }
605 }
606
607 size_t java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
608 assert(value_equals(value, java_lang_String::value(java_string)),
609 "value must be same as java_lang_String::value(java_string)");
610 int length = java_lang_String::length(java_string, value);
611 if (length == 0) {
612 return 0;
613 }
614 if (!java_lang_String::is_latin1(java_string)) {
615 return UNICODE::utf8_length(value->char_at_addr(0), length);
616 } else {
617 return UNICODE::utf8_length(value->byte_at_addr(0), length);
618 }
619 }
620
621 size_t java_lang_String::utf8_length(oop java_string) {
622 typeArrayOop value = java_lang_String::value(java_string);
623 return utf8_length(java_string, value);
624 }
625
626 int java_lang_String::utf8_length_as_int(oop java_string) {
627 typeArrayOop value = java_lang_String::value(java_string);
628 return utf8_length_as_int(java_string, value);
629 }
630
631 int java_lang_String::utf8_length_as_int(oop java_string, typeArrayOop value) {
632 assert(value_equals(value, java_lang_String::value(java_string)),
633 "value must be same as java_lang_String::value(java_string)");
634 int length = java_lang_String::length(java_string, value);
635 if (length == 0) {
636 return 0;
637 }
638 if (!java_lang_String::is_latin1(java_string)) {
639 return UNICODE::utf8_length_as_int(value->char_at_addr(0), length);
640 } else {
641 return UNICODE::utf8_length_as_int(value->byte_at_addr(0), length);
642 }
643 }
644
645 char* java_lang_String::as_utf8_string(oop java_string) {
646 size_t length;
647 return as_utf8_string(java_string, length);
648 }
649
650 char* java_lang_String::as_utf8_string(oop java_string, size_t& length) {
651 typeArrayOop value = java_lang_String::value(java_string);
652 // `length` is used as the incoming number of characters to
653 // convert, and then set as the number of bytes in the UTF8 sequence.
654 length = java_lang_String::length(java_string, value);
655 bool is_latin1 = java_lang_String::is_latin1(java_string);
656 if (!is_latin1) {
657 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
658 return UNICODE::as_utf8(position, length);
659 } else {
660 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
661 return UNICODE::as_utf8(position, length);
662 }
663 }
664
665 // Uses a provided buffer if it's sufficiently large, otherwise allocates
666 // a resource array to fit
667 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& utf8_len) {
668 typeArrayOop value = java_lang_String::value(java_string);
669 int len = java_lang_String::length(java_string, value);
670 bool is_latin1 = java_lang_String::is_latin1(java_string);
671 if (!is_latin1) {
672 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
673 utf8_len = UNICODE::utf8_length(position, len);
674 if (utf8_len >= buflen) {
675 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
676 }
677 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
678 } else {
679 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
680 utf8_len = UNICODE::utf8_length(position, len);
681 if (utf8_len >= buflen) {
682 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
683 }
684 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
685 }
686 }
687
688 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen) {
689 assert(value_equals(value, java_lang_String::value(java_string)),
690 "value must be same as java_lang_String::value(java_string)");
691 int length = java_lang_String::length(java_string, value);
692 bool is_latin1 = java_lang_String::is_latin1(java_string);
693 if (!is_latin1) {
694 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
695 return UNICODE::as_utf8(position, length, buf, buflen);
696 } else {
697 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
698 return UNICODE::as_utf8(position, length, buf, buflen);
699 }
700 }
701
702 char* java_lang_String::as_utf8_string(oop java_string, char* buf, size_t buflen) {
703 typeArrayOop value = java_lang_String::value(java_string);
704 return as_utf8_string(java_string, value, buf, buflen);
705 }
706
707 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
708 // `length` is used as the incoming number of characters to
709 // convert, and then set as the number of bytes in the UTF8 sequence.
710 size_t length = static_cast<size_t>(len);
711 typeArrayOop value = java_lang_String::value(java_string);
712 bool is_latin1 = java_lang_String::is_latin1(java_string);
713 assert(start + len <= java_lang_String::length(java_string), "just checking");
714 if (!is_latin1) {
715 jchar* position = value->char_at_addr(start);
716 return UNICODE::as_utf8(position, length);
717 } else {
718 jbyte* position = value->byte_at_addr(start);
719 return UNICODE::as_utf8(position, length);
720 }
721 }
722
723 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen) {
724 assert(value_equals(value, java_lang_String::value(java_string)),
725 "value must be same as java_lang_String::value(java_string)");
726 assert(start + len <= java_lang_String::length(java_string), "just checking");
727 bool is_latin1 = java_lang_String::is_latin1(java_string);
728 if (!is_latin1) {
729 jchar* position = value->char_at_addr(start);
730 return UNICODE::as_utf8(position, len, buf, buflen);
731 } else {
732 jbyte* position = value->byte_at_addr(start);
733 return UNICODE::as_utf8(position, len, buf, buflen);
734 }
735 }
736
737 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
738 assert(java_string->klass() == vmClasses::String_klass(),
739 "must be java_string");
740 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
741 int length = java_lang_String::length(java_string, value);
742 if (length != len) {
743 return false;
744 }
745 bool is_latin1 = java_lang_String::is_latin1(java_string);
746 if (!is_latin1) {
747 for (int i = 0; i < len; i++) {
748 if (value->char_at(i) != chars[i]) {
749 return false;
750 }
751 }
752 } else {
753 for (int i = 0; i < len; i++) {
754 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
755 return false;
756 }
757 }
758 }
759 return true;
760 }
761
762 bool java_lang_String::equals(oop java_string, const char* utf8_string, size_t utf8_len) {
763 assert(java_string->klass() == vmClasses::String_klass(),
764 "must be java_string");
765 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
766 int length = java_lang_String::length(java_string, value);
767 int unicode_length = UTF8::unicode_length(utf8_string, utf8_len);
768 if (length != unicode_length) {
769 return false;
770 }
771 bool is_latin1 = java_lang_String::is_latin1(java_string);
772 jchar c;
773 if (!is_latin1) {
774 for (int i = 0; i < unicode_length; i++) {
775 utf8_string = UTF8::next(utf8_string, &c);
776 if (value->char_at(i) != c) {
777 return false;
778 }
779 }
780 } else {
781 for (int i = 0; i < unicode_length; i++) {
782 utf8_string = UTF8::next(utf8_string, &c);
783 if ((((jchar) value->byte_at(i)) & 0xff) != c) {
784 return false;
785 }
786 }
787 }
788 return true;
789 }
790
791 bool java_lang_String::equals(oop str1, oop str2) {
792 assert(str1->klass() == vmClasses::String_klass(),
793 "must be java String");
794 assert(str2->klass() == vmClasses::String_klass(),
795 "must be java String");
796 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
797 bool is_latin1 = java_lang_String::is_latin1(str1);
798 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
799 bool is_latin2 = java_lang_String::is_latin1(str2);
800
801 if (is_latin1 != is_latin2) {
802 // Strings with different coders are never equal.
803 return false;
804 }
805 return value_equals(value1, value2);
806 }
807
808 // Print the given string to the given outputStream, limiting the output to
809 // at most max_length of the string's characters. If the length exceeds the
810 // limit we print an abridged version of the string with the "middle" elided
811 // and replaced by " ... (N characters ommitted) ... ". If max_length is odd
812 // it is treated as max_length-1.
813 void java_lang_String::print(oop java_string, outputStream* st, int max_length) {
814 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
815 // We need at least two characters to print A ... B
816 assert(max_length > 1, "invalid max_length: %d", max_length);
817
818 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
819
820 if (value == nullptr) {
821 // This can happen if, e.g., printing a String
822 // object before its initializer has been called
823 st->print("nullptr");
824 return;
825 }
826
827 int length = java_lang_String::length(java_string, value);
828 bool is_latin1 = java_lang_String::is_latin1(java_string);
829
830 bool abridge = length > max_length;
831
832 st->print("\"");
833 for (int index = 0; index < length; index++) {
834 // If we need to abridge and we've printed half the allowed characters
835 // then jump to the tail of the string.
836 if (abridge && index >= max_length / 2) {
837 st->print(" ... (%d characters ommitted) ... ", length - 2 * (max_length / 2));
838 index = length - (max_length / 2);
839 abridge = false; // only do this once
840 }
841 jchar c = (!is_latin1) ? value->char_at(index) :
842 ((jchar) value->byte_at(index)) & 0xff;
843 if (c < ' ') {
844 st->print("\\x%02X", c); // print control characters e.g. \x0A
845 } else {
846 st->print("%c", c);
847 }
848 }
849 st->print("\"");
850
851 if (length > max_length) {
852 st->print(" (abridged) ");
853 }
854 }
855
856 // java_lang_Class
857
858 int java_lang_Class::_klass_offset;
859 int java_lang_Class::_array_klass_offset;
860 int java_lang_Class::_oop_size_offset;
861 int java_lang_Class::_static_oop_field_count_offset;
862 int java_lang_Class::_class_loader_offset;
863 int java_lang_Class::_module_offset;
864 int java_lang_Class::_protection_domain_offset;
865 int java_lang_Class::_component_mirror_offset;
866 int java_lang_Class::_init_lock_offset;
867 int java_lang_Class::_signers_offset;
868 int java_lang_Class::_name_offset;
869 int java_lang_Class::_source_file_offset;
870 int java_lang_Class::_classData_offset;
871 int java_lang_Class::_classRedefinedCount_offset;
872 int java_lang_Class::_reflectionData_offset;
873 int java_lang_Class::_modifiers_offset;
874 int java_lang_Class::_is_primitive_offset;
875
876 bool java_lang_Class::_offsets_computed = false;
877 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
878 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
879
880 #ifdef ASSERT
881 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
882 assert(fd->has_initial_value(), "caller should have checked this");
883 assert(fd->field_type() == T_OBJECT, "caller should have checked this");
884 assert(fd->signature() == vmSymbols::string_signature(), "just checking");
885 }
886 #endif
887
888 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
889 DEBUG_ONLY(assert_valid_static_string_field(fd);)
890 oop string = fd->string_initial_value(CHECK);
891 mirror()->obj_field_put(fd->offset(), string);
892 }
893
894 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
895 assert(fd->has_initial_value(), "caller should have checked this");
896 BasicType t = fd->field_type();
897 switch (t) {
898 case T_BYTE:
899 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value()));
900 break;
901 case T_BOOLEAN:
902 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value()));
903 break;
904 case T_CHAR:
905 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value()));
906 break;
907 case T_SHORT:
908 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value()));
909 break;
910 case T_INT:
911 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
912 break;
913 case T_FLOAT:
914 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
915 break;
916 case T_DOUBLE:
917 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
918 break;
919 case T_LONG:
920 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
921 break;
922 default:
923 // Illegal ConstantValue attribute in class file should have been
924 // caught during classfile parsing.
925 ShouldNotReachHere();
926 }
927 }
928
929 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
930 assert(mirror.not_null() && fd->is_static(), "just checking");
931 if (fd->has_initial_value()) {
932 if (fd->field_type() != T_OBJECT) {
933 initialize_static_primitive_field(fd, mirror);
934 } else {
935 initialize_static_string_field(fd, mirror, CHECK);
936 }
937 }
938 }
939
940 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
941 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
942
943 // If the offset was read from the shared archive, it was fixed up already
944 if (!k->is_shared()) {
945 if (k->is_instance_klass()) {
946 // During bootstrap, java.lang.Class wasn't loaded so static field
947 // offsets were computed without the size added it. Go back and
948 // update all the static field offsets to included the size.
949
950 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
951 // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
952 // static fields offsets are updated in this array before reencoding everything into
953 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
954
955 int java_fields;
956 int injected_fields;
957 InstanceKlass* ik = InstanceKlass::cast(k);
958 GrowableArray<FieldInfo>* fields =
959 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
960 &java_fields, &injected_fields);
961 for (int i = 0; i < fields->length(); i++) {
962 FieldInfo* fi = fields->adr_at(i);
963 if (fi->access_flags().is_static()) {
964 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
965 }
966 }
967 Array<u1>* old_stream = ik->fieldinfo_stream();
968 assert(fields->length() == (java_fields + injected_fields), "Must be");
969 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
970 ik->set_fieldinfo_stream(new_fis);
971 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
972 }
973 }
974
975 if (k->is_shared() && k->has_archived_mirror_index()) {
976 if (ArchiveHeapLoader::is_in_use()) {
977 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
978 assert(present, "Missing archived mirror for %s", k->external_name());
979 return;
980 } else {
981 k->clear_java_mirror_handle();
982 k->clear_archived_mirror_index();
983 }
984 }
985 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
986 }
987
988 void java_lang_Class::initialize_mirror_fields(Klass* k,
989 Handle mirror,
990 Handle protection_domain,
991 Handle classData,
992 TRAPS) {
993 // Allocate a simple java object for a lock.
994 // This needs to be a java object because during class initialization
995 // it can be held across a java call.
996 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
997 set_init_lock(mirror(), r);
998
999 // Set protection domain also
1000 set_protection_domain(mirror(), protection_domain());
1001
1002 // Initialize static fields
1003 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
1004
1005 // Set classData
1006 set_class_data(mirror(), classData());
1007 }
1008
1009 // Set the java.lang.Module module field in the java_lang_Class mirror
1010 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
1011 if (module.is_null()) {
1012 // During startup, the module may be null only if java.base has not been defined yet.
1013 // Put the class on the fixup_module_list to patch later when the java.lang.Module
1014 // for java.base is known. But note that since we captured the null module another
1015 // thread may have completed that initialization.
1016
1017 bool javabase_was_defined = false;
1018 {
1019 MutexLocker m1(current, Module_lock);
1020 // Keep list of classes needing java.base module fixup
1021 if (!ModuleEntryTable::javabase_defined()) {
1022 assert(k->java_mirror() != nullptr, "Class's mirror is null");
1023 k->class_loader_data()->inc_keep_alive_ref_count();
1024 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
1025 fixup_module_field_list()->push(k);
1026 } else {
1027 javabase_was_defined = true;
1028 }
1029 }
1030
1031 // If java.base was already defined then patch this particular class with java.base.
1032 if (javabase_was_defined) {
1033 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
1034 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr,
1035 "Setting class module field, " JAVA_BASE_NAME " should be defined");
1036 Handle javabase_handle(current, javabase_entry->module());
1037 set_module(mirror(), javabase_handle());
1038 }
1039 } else {
1040 assert(Universe::is_module_initialized() ||
1041 (ModuleEntryTable::javabase_defined() &&
1042 (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
1043 "Incorrect java.lang.Module specification while creating mirror");
1044 set_module(mirror(), module());
1045 }
1046 }
1047
1048 // Statically allocate fixup lists because they always get created.
1049 void java_lang_Class::allocate_fixup_lists() {
1050 GrowableArray<Klass*>* mirror_list =
1051 new (mtClass) GrowableArray<Klass*>(40, mtClass);
1052 set_fixup_mirror_list(mirror_list);
1053
1054 GrowableArray<Klass*>* module_list =
1055 new (mtModule) GrowableArray<Klass*>(500, mtModule);
1056 set_fixup_module_field_list(module_list);
1057 }
1058
1059 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
1060 Handle& mirror, Handle& comp_mirror, TRAPS) {
1061 // Allocate mirror (java.lang.Class instance)
1062 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
1063 mirror = Handle(THREAD, mirror_oop);
1064
1065 // Setup indirection from mirror->klass
1066 set_klass(mirror(), k);
1067
1068 // Set the modifiers flag.
1069 u2 computed_modifiers = k->compute_modifier_flags();
1070 set_modifiers(mirror(), computed_modifiers);
1071
1072 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
1073 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
1074
1075 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
1076
1077 // It might also have a component mirror. This mirror must already exist.
1078 if (k->is_array_klass()) {
1079 if (k->is_flatArray_klass()) {
1080 Klass* element_klass = (Klass*) FlatArrayKlass::cast(k)->element_klass();
1081 assert(element_klass->is_inline_klass(), "Must be inline type component");
1082 if (is_scratch) {
1083 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1084 } else {
1085 comp_mirror = Handle(THREAD, element_klass->java_mirror());
1086 }
1087 } else if (k->is_typeArray_klass()) {
1088 BasicType type = TypeArrayKlass::cast(k)->element_type();
1089 if (is_scratch) {
1090 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
1091 } else {
1092 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
1093 }
1094 } else {
1095 assert(k->is_objArray_klass(), "Must be");
1096 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1097 assert(element_klass != nullptr, "Must have an element klass");
1098 oop comp_oop = element_klass->java_mirror();
1099 if (is_scratch) {
1100 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1101 } else {
1102 comp_mirror = Handle(THREAD, comp_oop);
1103 }
1104 }
1105 assert(comp_mirror() != nullptr, "must have a mirror");
1106
1107 // Two-way link between the array klass and its component mirror:
1108 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1109 set_component_mirror(mirror(), comp_mirror());
1110 // See below for ordering dependencies between field array_klass in component mirror
1111 // and java_mirror in this klass.
1112 } else {
1113 assert(k->is_instance_klass(), "Must be");
1114
1115 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD);
1116 if (HAS_PENDING_EXCEPTION) {
1117 // If any of the fields throws an exception like OOM remove the klass field
1118 // from the mirror so GC doesn't follow it after the klass has been deallocated.
1119 // This mirror looks like a primitive type, which logically it is because it
1120 // it represents no class.
1121 set_klass(mirror(), nullptr);
1122 return;
1123 }
1124 }
1125 }
1126
1127 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1128 Handle module, Handle protection_domain,
1129 Handle classData, TRAPS) {
1130 assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1131 assert(k->java_mirror() == nullptr, "should only assign mirror once");
1132
1133 // Class_klass has to be loaded because it is used to allocate
1134 // the mirror.
1135 if (vmClasses::Class_klass_loaded()) {
1136 Handle mirror;
1137 Handle comp_mirror;
1138
1139 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1140
1141 // set the classLoader field in the java_lang_Class instance
1142 assert(class_loader() == k->class_loader(), "should be same");
1143 set_class_loader(mirror(), class_loader());
1144
1145 // Setup indirection from klass->mirror
1146 // after any exceptions can happen during allocations.
1147 k->set_java_mirror(mirror);
1148
1149 // Set the module field in the java_lang_Class instance. This must be done
1150 // after the mirror is set.
1151 set_mirror_module_field(THREAD, k, mirror, module);
1152
1153 if (comp_mirror() != nullptr) {
1154 // Set after k->java_mirror() is published, because compiled code running
1155 // concurrently doesn't expect a k to have a null java_mirror.
1156 release_set_array_klass(comp_mirror(), k);
1157 }
1158
1159 if (CDSConfig::is_dumping_heap()) {
1160 create_scratch_mirror(k, CHECK);
1161 }
1162 } else {
1163 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1164 fixup_mirror_list()->push(k);
1165 }
1166 }
1167
1168 #if INCLUDE_CDS_JAVA_HEAP
1169 // The "scratch mirror" stores the states of the mirror object that can be
1170 // decided at dump time (such as the initial values of the static fields, the
1171 // component mirror, etc). At runtime, more information is added to it by
1172 // java_lang_Class::restore_archived_mirror().
1173 //
1174 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1175 // produces the same result as /*runtime*/create_mirror().
1176 //
1177 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1178 // latter may contain dumptime-specific information that cannot be archived
1179 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1180 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1181 if ((k->class_loader() != nullptr &&
1182 k->class_loader() != SystemDictionary::java_platform_loader() &&
1183 k->class_loader() != SystemDictionary::java_system_loader())) {
1184 // We only archive the mirrors of classes loaded by the built-in loaders
1185 return;
1186 }
1187
1188 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1189 Handle mirror;
1190 Handle comp_mirror;
1191 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1192
1193 if (comp_mirror() != nullptr) {
1194 release_set_array_klass(comp_mirror(), k);
1195 }
1196
1197 HeapShared::set_scratch_java_mirror(k, mirror());
1198 }
1199
1200 // Returns true if the mirror is updated, false if no archived mirror
1201 // data is present. After the archived mirror object is restored, the
1202 // shared klass' _has_raw_archived_mirror flag is cleared.
1203 bool java_lang_Class::restore_archived_mirror(Klass *k,
1204 Handle class_loader, Handle module,
1205 Handle protection_domain, TRAPS) {
1206 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1207 // see more details in vmClasses::resolve_all().
1208 if (!vmClasses::Class_klass_loaded()) {
1209 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1210 fixup_mirror_list()->push(k);
1211 return true;
1212 }
1213
1214 oop m = k->archived_java_mirror();
1215 assert(m != nullptr, "must have stored non-null archived mirror");
1216
1217 // Sanity: clear it now to prevent re-initialization if any of the following fails
1218 k->clear_archived_mirror_index();
1219
1220 // mirror is archived, restore
1221 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1222 assert(as_Klass(m) == k, "must be");
1223 Handle mirror(THREAD, m);
1224
1225 if (!k->is_array_klass()) {
1226 // - local static final fields with initial values were initialized at dump time
1227
1228 // create the init_lock
1229 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1230 set_init_lock(mirror(), r);
1231
1232 if (protection_domain.not_null()) {
1233 set_protection_domain(mirror(), protection_domain());
1234 }
1235 }
1236
1237 assert(class_loader() == k->class_loader(), "should be same");
1238 if (class_loader.not_null()) {
1239 set_class_loader(mirror(), class_loader());
1240 }
1241
1242 k->set_java_mirror(mirror);
1243
1244 set_mirror_module_field(THREAD, k, mirror, module);
1245
1246 if (log_is_enabled(Trace, cds, heap, mirror)) {
1247 ResourceMark rm(THREAD);
1248 log_trace(cds, heap, mirror)(
1249 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1250 }
1251
1252 return true;
1253 }
1254 #endif // INCLUDE_CDS_JAVA_HEAP
1255
1256 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1257 assert(_module_offset != 0, "must have been computed already");
1258 set_module(k->java_mirror(), module());
1259 }
1260
1261 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1262 assert(_oop_size_offset != 0, "must be set");
1263 assert(size > 0, "Oop size must be greater than zero, not %zu", size);
1264 assert(size <= INT_MAX, "Lossy conversion: %zu", size);
1265 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1266 }
1267
1268 int java_lang_Class::static_oop_field_count(oop java_class) {
1269 assert(_static_oop_field_count_offset != 0, "must be set");
1270 return java_class->int_field(_static_oop_field_count_offset);
1271 }
1272
1273 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1274 assert(_static_oop_field_count_offset != 0, "must be set");
1275 java_class->int_field_put(_static_oop_field_count_offset, size);
1276 }
1277
1278 oop java_lang_Class::protection_domain(oop java_class) {
1279 assert(_protection_domain_offset != 0, "must be set");
1280 return java_class->obj_field(_protection_domain_offset);
1281 }
1282 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1283 assert(_protection_domain_offset != 0, "must be set");
1284 java_class->obj_field_put(_protection_domain_offset, pd);
1285 }
1286
1287 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1288 assert(_component_mirror_offset != 0, "must be set");
1289 assert(java_lang_Class::as_Klass(java_class) != nullptr &&
1290 java_lang_Class::as_Klass(java_class)->is_array_klass(), "must be");
1291 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1292 }
1293
1294 oop java_lang_Class::component_mirror(oop java_class) {
1295 assert(_component_mirror_offset != 0, "must be set");
1296 return java_class->obj_field(_component_mirror_offset);
1297 }
1298
1299 oop java_lang_Class::init_lock(oop java_class) {
1300 assert(_init_lock_offset != 0, "must be set");
1301 return java_class->obj_field(_init_lock_offset);
1302 }
1303 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1304 assert(_init_lock_offset != 0, "must be set");
1305 java_class->obj_field_put(_init_lock_offset, init_lock);
1306 }
1307
1308 objArrayOop java_lang_Class::signers(oop java_class) {
1309 assert(_signers_offset != 0, "must be set");
1310 return (objArrayOop)java_class->obj_field(_signers_offset);
1311 }
1312
1313 oop java_lang_Class::class_data(oop java_class) {
1314 assert(_classData_offset != 0, "must be set");
1315 return java_class->obj_field(_classData_offset);
1316 }
1317 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1318 assert(_classData_offset != 0, "must be set");
1319 java_class->obj_field_put(_classData_offset, class_data);
1320 }
1321
1322 void java_lang_Class::set_reflection_data(oop java_class, oop reflection_data) {
1323 assert(_reflectionData_offset != 0, "must be set");
1324 java_class->obj_field_put(_reflectionData_offset, reflection_data);
1325 }
1326
1327 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1328 assert(_class_loader_offset != 0, "offsets should have been initialized");
1329 java_class->obj_field_put(_class_loader_offset, loader);
1330 }
1331
1332 oop java_lang_Class::class_loader(oop java_class) {
1333 assert(_class_loader_offset != 0, "must be set");
1334 return java_class->obj_field(_class_loader_offset);
1335 }
1336
1337 oop java_lang_Class::module(oop java_class) {
1338 assert(_module_offset != 0, "must be set");
1339 return java_class->obj_field(_module_offset);
1340 }
1341
1342 void java_lang_Class::set_module(oop java_class, oop module) {
1343 assert(_module_offset != 0, "must be set");
1344 java_class->obj_field_put(_module_offset, module);
1345 }
1346
1347 oop java_lang_Class::name(Handle java_class, TRAPS) {
1348 assert(_name_offset != 0, "must be set");
1349 oop o = java_class->obj_field(_name_offset);
1350 if (o == nullptr) {
1351 o = StringTable::intern(as_external_name(java_class()), THREAD);
1352 java_class->obj_field_put(_name_offset, o);
1353 }
1354 return o;
1355 }
1356
1357 oop java_lang_Class::source_file(oop java_class) {
1358 assert(_source_file_offset != 0, "must be set");
1359 return java_class->obj_field(_source_file_offset);
1360 }
1361
1362 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1363 assert(_source_file_offset != 0, "must be set");
1364 java_class->obj_field_put(_source_file_offset, source_file);
1365 }
1366
1367 void java_lang_Class::set_is_primitive(oop java_class) {
1368 assert(_is_primitive_offset != 0, "must be set");
1369 java_class->bool_field_put(_is_primitive_offset, true);
1370 }
1371
1372
1373 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1374 // Mirrors for basic types have a null klass field, which makes them special.
1375 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1376 if (type != T_VOID) {
1377 Klass* aklass = Universe::typeArrayKlass(type);
1378 assert(aklass != nullptr, "correct bootstrap");
1379 release_set_array_klass(java_class, aklass);
1380 }
1381 #ifdef ASSERT
1382 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1383 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1384 #endif
1385 set_modifiers(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
1386 set_is_primitive(java_class);
1387 return java_class;
1388 }
1389
1390 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1391 assert(is_instance(java_class), "must be a Class object");
1392 java_class->metadata_field_put(_klass_offset, klass);
1393 }
1394
1395
1396 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1397 assert(is_instance(java_class), "must be a Class object");
1398 Symbol* name = nullptr;
1399 bool is_instance = false;
1400 if (is_primitive(java_class)) {
1401 name = vmSymbols::type_signature(primitive_type(java_class));
1402 } else {
1403 Klass* k = as_Klass(java_class);
1404 is_instance = k->is_instance_klass();
1405 name = k->name();
1406 }
1407 if (name == nullptr) {
1408 st->print("<null>");
1409 return;
1410 }
1411 if (is_instance) {
1412 st->print("L");
1413 }
1414 st->write((char*) name->base(), (int) name->utf8_length());
1415 if (is_instance) st->print(";");
1416 }
1417
1418 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1419 assert(is_instance(java_class), "must be a Class object");
1420 Symbol* name;
1421 if (is_primitive(java_class)) {
1422 name = vmSymbols::type_signature(primitive_type(java_class));
1423 // Because this can create a new symbol, the caller has to decrement
1424 // the refcount, so make adjustment here and below for symbols returned
1425 // that are not created or incremented due to a successful lookup.
1426 name->increment_refcount();
1427 } else {
1428 Klass* k = as_Klass(java_class);
1429 if (!k->is_instance_klass()) {
1430 name = k->name();
1431 name->increment_refcount();
1432 } else {
1433 ResourceMark rm;
1434 const char* sigstr = k->signature_name();
1435 int siglen = (int) strlen(sigstr);
1436 if (!intern_if_not_found) {
1437 name = SymbolTable::probe(sigstr, siglen);
1438 } else {
1439 name = SymbolTable::new_symbol(sigstr, siglen);
1440 }
1441 }
1442 }
1443 return name;
1444 }
1445
1446 // Returns the Java name for this Java mirror (Resource allocated)
1447 // See Klass::external_name().
1448 // For primitive type Java mirrors, its type name is returned.
1449 const char* java_lang_Class::as_external_name(oop java_class) {
1450 assert(is_instance(java_class), "must be a Class object");
1451 const char* name = nullptr;
1452 if (is_primitive(java_class)) {
1453 name = type2name(primitive_type(java_class));
1454 } else {
1455 name = as_Klass(java_class)->external_name();
1456 }
1457 if (name == nullptr) {
1458 name = "<null>";
1459 }
1460 return name;
1461 }
1462
1463 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1464 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1465 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass");
1466 return k;
1467 }
1468
1469
1470 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1471 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1472 if (klass->is_flatArray_klass() || (ArrayKlass::cast(klass)->is_null_free_array_klass())) {
1473 // TODO 8336006 Ignore flat / null-free arrays
1474 return;
1475 }
1476 java_class->release_metadata_field_put(_array_klass_offset, klass);
1477 }
1478
1479
1480 BasicType java_lang_Class::primitive_type(oop java_class) {
1481 assert(is_primitive(java_class), "just checking");
1482 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1483 BasicType type = T_VOID;
1484 if (ak != nullptr) {
1485 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1486 type = ArrayKlass::cast(ak)->element_type();
1487 } else {
1488 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1489 }
1490 #ifdef ASSERT
1491 if (CDSConfig::is_dumping_heap()) {
1492 oop mirror = Universe::java_mirror(type);
1493 oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1494 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1495 } else {
1496 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1497 }
1498 #endif
1499 return type;
1500 }
1501
1502 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1503 assert(is_instance(java_class), "must be a Class object");
1504 if (is_primitive(java_class)) {
1505 if (reference_klass != nullptr)
1506 (*reference_klass) = nullptr;
1507 return primitive_type(java_class);
1508 } else {
1509 if (reference_klass != nullptr)
1510 (*reference_klass) = as_Klass(java_class);
1511 return T_OBJECT;
1512 }
1513 }
1514
1515
1516 oop java_lang_Class::primitive_mirror(BasicType t) {
1517 oop mirror = Universe::java_mirror(t);
1518 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1519 assert(is_primitive(mirror), "must be primitive");
1520 return mirror;
1521 }
1522
1523 #define CLASS_FIELDS_DO(macro) \
1524 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1525 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1526 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1527 macro(_module_offset, k, "module", module_signature, false); \
1528 macro(_name_offset, k, "name", string_signature, false); \
1529 macro(_classData_offset, k, "classData", object_signature, false); \
1530 macro(_reflectionData_offset, k, "reflectionData", java_lang_ref_SoftReference_signature, false); \
1531 macro(_signers_offset, k, "signers", object_array_signature, false); \
1532 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), char_signature, false); \
1533 macro(_protection_domain_offset, k, "protectionDomain", java_security_ProtectionDomain_signature, false); \
1534 macro(_is_primitive_offset, k, "primitive", bool_signature, false);
1535
1536 void java_lang_Class::compute_offsets() {
1537 if (_offsets_computed) {
1538 return;
1539 }
1540
1541 _offsets_computed = true;
1542
1543 InstanceKlass* k = vmClasses::Class_klass();
1544 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1545 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1546 }
1547
1548 #if INCLUDE_CDS
1549 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1550 f->do_bool(&_offsets_computed);
1551
1552 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1553
1554 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1555 }
1556 #endif
1557
1558 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1559 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1560 return the_class_mirror->int_field(_classRedefinedCount_offset);
1561 }
1562
1563 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1564 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1565 the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1566 }
1567
1568 int java_lang_Class::modifiers(oop the_class_mirror) {
1569 assert(_modifiers_offset != 0, "offsets should have been initialized");
1570 return the_class_mirror->char_field(_modifiers_offset);
1571 }
1572
1573 void java_lang_Class::set_modifiers(oop the_class_mirror, u2 value) {
1574 assert(_modifiers_offset != 0, "offsets should have been initialized");
1575 the_class_mirror->char_field_put(_modifiers_offset, value);
1576 }
1577
1578
1579 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1580 // platform thread structure, and a eetop offset which was used for thread
1581 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1582 // merged, so in the HotSpot VM we just use the eetop field for the thread
1583 // instead of the privateInfo_offset.
1584 //
1585 // Note: The stackSize field is only present starting in 1.4.
1586
1587 int java_lang_Thread_FieldHolder::_group_offset;
1588 int java_lang_Thread_FieldHolder::_priority_offset;
1589 int java_lang_Thread_FieldHolder::_stackSize_offset;
1590 int java_lang_Thread_FieldHolder::_daemon_offset;
1591 int java_lang_Thread_FieldHolder::_thread_status_offset;
1592
1593 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1594 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1595 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1596 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1597 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1598 macro(_thread_status_offset, k, "threadStatus", int_signature, false)
1599
1600 void java_lang_Thread_FieldHolder::compute_offsets() {
1601 assert(_group_offset == 0, "offsets should be initialized only once");
1602
1603 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1604 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1605 }
1606
1607 #if INCLUDE_CDS
1608 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1609 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1610 }
1611 #endif
1612
1613 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1614 return holder->obj_field(_group_offset);
1615 }
1616
1617 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1618 return (ThreadPriority)holder->int_field(_priority_offset);
1619 }
1620
1621 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1622 holder->int_field_put(_priority_offset, priority);
1623 }
1624
1625 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1626 return holder->long_field(_stackSize_offset);
1627 }
1628
1629 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1630 return holder->bool_field(_daemon_offset) != 0;
1631 }
1632
1633 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1634 assert(val, "daemon status is never turned off");
1635 holder->bool_field_put(_daemon_offset, val);
1636 }
1637
1638 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1639 holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1640 }
1641
1642 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1643 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1644 }
1645
1646
1647 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1648
1649 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1650 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true);
1651
1652 void java_lang_Thread_Constants::compute_offsets() {
1653 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1654
1655 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1656 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1657 }
1658
1659 #if INCLUDE_CDS
1660 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1661 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1662 }
1663 #endif
1664
1665 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1666 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1667 oop base = k->static_field_base_raw();
1668 return base->obj_field(_static_VTHREAD_GROUP_offset);
1669 }
1670
1671
1672 int java_lang_Thread::_holder_offset;
1673 int java_lang_Thread::_name_offset;
1674 int java_lang_Thread::_contextClassLoader_offset;
1675 int java_lang_Thread::_eetop_offset;
1676 int java_lang_Thread::_jvmti_thread_state_offset;
1677 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1678 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1679 int java_lang_Thread::_interrupted_offset;
1680 int java_lang_Thread::_interruptLock_offset;
1681 int java_lang_Thread::_tid_offset;
1682 int java_lang_Thread::_continuation_offset;
1683 int java_lang_Thread::_park_blocker_offset;
1684 int java_lang_Thread::_scopedValueBindings_offset;
1685 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1686
1687 #define THREAD_FIELDS_DO(macro) \
1688 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \
1689 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1690 macro(_contextClassLoader_offset, k, "contextClassLoader", classloader_signature, false); \
1691 macro(_eetop_offset, k, "eetop", long_signature, false); \
1692 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1693 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \
1694 macro(_tid_offset, k, "tid", long_signature, false); \
1695 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1696 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1697 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1698
1699 void java_lang_Thread::compute_offsets() {
1700 assert(_holder_offset == 0, "offsets should be initialized only once");
1701
1702 InstanceKlass* k = vmClasses::Thread_klass();
1703 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1704 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1705 }
1706
1707 #if INCLUDE_CDS
1708 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1709 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1710 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1711 }
1712 #endif
1713
1714 JavaThread* java_lang_Thread::thread(oop java_thread) {
1715 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1716 }
1717
1718 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1719 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1720 }
1721
1722 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1723 java_thread->address_field_put(_eetop_offset, (address)thread);
1724 }
1725
1726 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1727 java_thread->release_address_field_put(_eetop_offset, (address)thread);
1728 }
1729
1730 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1731 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1732 }
1733
1734 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1735 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1736 }
1737
1738 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1739 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1740 }
1741
1742 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1743 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1744 int val = VTMS_transition_disable_count(java_thread);
1745 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1746 }
1747
1748 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1749 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1750 int val = VTMS_transition_disable_count(java_thread);
1751 assert(val > 0, "VTMS_transition_disable_count should never be negative");
1752 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1753 }
1754
1755 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1756 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1757 }
1758
1759 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1760 assert(is_in_VTMS_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside");
1761 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1762 }
1763
1764 int java_lang_Thread::is_in_VTMS_transition_offset() {
1765 return _jvmti_is_in_VTMS_transition_offset;
1766 }
1767
1768 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1769 assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1770 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1771 }
1772
1773 oop java_lang_Thread::holder(oop java_thread) {
1774 // Note: may return null if the thread is still attaching
1775 return java_thread->obj_field(_holder_offset);
1776 }
1777 oop java_lang_Thread::interrupt_lock(oop java_thread) {
1778 return java_thread->obj_field(_interruptLock_offset);
1779 }
1780
1781 bool java_lang_Thread::interrupted(oop java_thread) {
1782 // Make sure the caller can safely access oops.
1783 assert(Thread::current()->is_VM_thread() ||
1784 (JavaThread::current()->thread_state() != _thread_blocked &&
1785 JavaThread::current()->thread_state() != _thread_in_native),
1786 "Unsafe access to oop");
1787 return java_thread->bool_field_volatile(_interrupted_offset);
1788 }
1789
1790 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1791 // Make sure the caller can safely access oops.
1792 assert(Thread::current()->is_VM_thread() ||
1793 (JavaThread::current()->thread_state() != _thread_blocked &&
1794 JavaThread::current()->thread_state() != _thread_in_native),
1795 "Unsafe access to oop");
1796 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1797 }
1798
1799
1800 oop java_lang_Thread::name(oop java_thread) {
1801 return java_thread->obj_field(_name_offset);
1802 }
1803
1804
1805 void java_lang_Thread::set_name(oop java_thread, oop name) {
1806 java_thread->obj_field_put(_name_offset, name);
1807 }
1808
1809 // Convenience macros for setting and getting Thread fields that
1810 // are actually stored in the FieldHolder object of the thread.
1811 // The FieldHolder can be null whilst a thread is attaching via
1812 // JNI, and when the main thread is attaching.
1813
1814 // The default value should be the default/zero initialized value
1815 // of the field as it would be in java.lang.Thread.FieldHolder.
1816 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \
1817 { \
1818 oop holder = java_lang_Thread::holder(java_thread); \
1819 if (holder != nullptr) \
1820 return java_lang_Thread_FieldHolder::field(holder); \
1821 else \
1822 return default_val; \
1823 }
1824
1825 // We should never be trying to set a field of an attaching thread.
1826 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \
1827 { \
1828 oop holder = java_lang_Thread::holder(java_thread); \
1829 assert(holder != nullptr, "Thread not fully initialized"); \
1830 java_lang_Thread_FieldHolder::set_##field(holder, value); \
1831 }
1832
1833
1834 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1835 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1836 }
1837
1838
1839 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1840 SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1841 }
1842
1843
1844 oop java_lang_Thread::threadGroup(oop java_thread) {
1845 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1846 }
1847
1848
1849 bool java_lang_Thread::is_alive(oop java_thread) {
1850 JavaThread* thr = java_lang_Thread::thread(java_thread);
1851 return (thr != nullptr);
1852 }
1853
1854
1855 bool java_lang_Thread::is_daemon(oop java_thread) {
1856 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1857 }
1858
1859
1860 void java_lang_Thread::set_daemon(oop java_thread) {
1861 SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1862 }
1863
1864 oop java_lang_Thread::context_class_loader(oop java_thread) {
1865 return java_thread->obj_field(_contextClassLoader_offset);
1866 }
1867
1868
1869 jlong java_lang_Thread::stackSize(oop java_thread) {
1870 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1871 }
1872
1873 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1874 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1875 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1876 }
1877
1878 // Read thread status value from threadStatus field in java.lang.Thread java class.
1879 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1880 // Make sure the caller is operating on behalf of the VM or is
1881 // running VM code (state == _thread_in_vm).
1882 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1883 JavaThread::current()->thread_state() == _thread_in_vm,
1884 "Java Thread is not running in vm");
1885 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1886 }
1887
1888 ByteSize java_lang_Thread::thread_id_offset() {
1889 return in_ByteSize(_tid_offset);
1890 }
1891
1892 oop java_lang_Thread::park_blocker(oop java_thread) {
1893 return java_thread->obj_field(_park_blocker_offset);
1894 }
1895
1896 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) {
1897 ThreadsListHandle tlh(JavaThread::current());
1898 JavaThread* thread;
1899 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread);
1900 if (is_virtual) {
1901 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread);
1902 if (carrier_thread == nullptr) {
1903 return nullptr;
1904 }
1905 thread = java_lang_Thread::thread(carrier_thread);
1906 } else {
1907 thread = java_lang_Thread::thread(java_thread);
1908 }
1909 if (thread == nullptr) {
1910 return nullptr;
1911 }
1912
1913 class GetStackTraceClosure : public HandshakeClosure {
1914 public:
1915 const Handle _java_thread;
1916 int _depth;
1917 bool _retry_handshake;
1918 GrowableArray<Method*>* _methods;
1919 GrowableArray<int>* _bcis;
1920
1921 GetStackTraceClosure(Handle java_thread) :
1922 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false),
1923 _methods(nullptr), _bcis(nullptr) {
1924 }
1925 ~GetStackTraceClosure() {
1926 delete _methods;
1927 delete _bcis;
1928 }
1929
1930 bool read_reset_retry() {
1931 bool ret = _retry_handshake;
1932 // If we re-execute the handshake this method need to return false
1933 // when the handshake cannot be performed. (E.g. thread terminating)
1934 _retry_handshake = false;
1935 return ret;
1936 }
1937
1938 void do_thread(Thread* th) {
1939 if (!Thread::current()->is_Java_thread()) {
1940 _retry_handshake = true;
1941 return;
1942 }
1943
1944 JavaThread* thread = JavaThread::cast(th);
1945
1946 if (!thread->has_last_Java_frame()) {
1947 return;
1948 }
1949
1950 bool carrier = false;
1951 if (java_lang_VirtualThread::is_instance(_java_thread())) {
1952 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
1953 const ContinuationEntry* ce = thread->vthread_continuation();
1954 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) {
1955 return; // not mounted
1956 }
1957 } else {
1958 carrier = (thread->vthread_continuation() != nullptr);
1959 }
1960
1961 const int max_depth = MaxJavaStackTraceDepth;
1962 const bool skip_hidden = !ShowHiddenFrames;
1963
1964 // Pick minimum length that will cover most cases
1965 int init_length = 64;
1966 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1967 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
1968
1969 int total_count = 0;
1970 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops
1971 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
1972 vfst.next()) {
1973
1974 if (skip_hidden && (vfst.method()->is_hidden() ||
1975 vfst.method()->is_continuation_enter_intrinsic())) {
1976 continue;
1977 }
1978
1979 _methods->push(vfst.method());
1980 _bcis->push(vfst.bci());
1981 total_count++;
1982 }
1983
1984 _depth = total_count;
1985 }
1986 };
1987
1988 // Handshake with target
1989 ResourceMark rm(THREAD);
1990 HandleMark hm(THREAD);
1991 GetStackTraceClosure gstc(Handle(THREAD, java_thread));
1992 do {
1993 Handshake::execute(&gstc, &tlh, thread);
1994 } while (gstc.read_reset_retry());
1995
1996 // Stop if no stack trace is found.
1997 if (gstc._depth == 0) {
1998 return nullptr;
1999 }
2000
2001 // Convert to StackTraceElement array
2002 InstanceKlass* k = vmClasses::StackTraceElement_klass();
2003 assert(k != nullptr, "must be loaded in 1.4+");
2004 if (k->should_be_initialized()) {
2005 k->initialize(CHECK_NULL);
2006 }
2007 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL);
2008
2009 for (int i = 0; i < gstc._depth; i++) {
2010 methodHandle method(THREAD, gstc._methods->at(i));
2011 oop element = java_lang_StackTraceElement::create(method,
2012 gstc._bcis->at(i),
2013 CHECK_NULL);
2014 trace->obj_at_put(i, element);
2015 }
2016
2017 return trace();
2018 }
2019
2020 const char* java_lang_Thread::thread_status_name(oop java_thread) {
2021 JavaThreadStatus status = get_thread_status(java_thread);
2022 switch (status) {
2023 case JavaThreadStatus::NEW : return "NEW";
2024 case JavaThreadStatus::RUNNABLE : return "RUNNABLE";
2025 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)";
2026 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)";
2027 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
2028 case JavaThreadStatus::PARKED : return "WAITING (parking)";
2029 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)";
2030 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
2031 case JavaThreadStatus::TERMINATED : return "TERMINATED";
2032 default : return "UNKNOWN";
2033 };
2034 }
2035 int java_lang_ThreadGroup::_parent_offset;
2036 int java_lang_ThreadGroup::_name_offset;
2037 int java_lang_ThreadGroup::_maxPriority_offset;
2038 int java_lang_ThreadGroup::_daemon_offset;
2039
2040 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
2041 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2042 return java_thread_group->obj_field(_parent_offset);
2043 }
2044
2045 // ("name as oop" accessor is not necessary)
2046
2047 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
2048 oop name = java_thread_group->obj_field(_name_offset);
2049 // ThreadGroup.name can be null
2050 if (name != nullptr) {
2051 return java_lang_String::as_utf8_string(name);
2052 }
2053 return nullptr;
2054 }
2055
2056 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
2057 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2058 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
2059 }
2060
2061 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
2062 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2063 return java_thread_group->bool_field(_daemon_offset) != 0;
2064 }
2065
2066 #define THREADGROUP_FIELDS_DO(macro) \
2067 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
2068 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
2069 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
2070 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false);
2071
2072 void java_lang_ThreadGroup::compute_offsets() {
2073 assert(_parent_offset == 0, "offsets should be initialized only once");
2074
2075 InstanceKlass* k = vmClasses::ThreadGroup_klass();
2076 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2077 }
2078
2079 #if INCLUDE_CDS
2080 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
2081 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2082 }
2083 #endif
2084
2085
2086 // java_lang_VirtualThread
2087
2088 int java_lang_VirtualThread::static_vthread_scope_offset;
2089 int java_lang_VirtualThread::_carrierThread_offset;
2090 int java_lang_VirtualThread::_continuation_offset;
2091 int java_lang_VirtualThread::_state_offset;
2092 int java_lang_VirtualThread::_next_offset;
2093 int java_lang_VirtualThread::_onWaitingList_offset;
2094 int java_lang_VirtualThread::_notified_offset;
2095 int java_lang_VirtualThread::_timeout_offset;
2096 int java_lang_VirtualThread::_objectWaiter_offset;
2097
2098 #define VTHREAD_FIELDS_DO(macro) \
2099 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \
2100 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \
2101 macro(_continuation_offset, k, "cont", continuation_signature, false); \
2102 macro(_state_offset, k, "state", int_signature, false); \
2103 macro(_next_offset, k, "next", vthread_signature, false); \
2104 macro(_onWaitingList_offset, k, "onWaitingList", bool_signature, false); \
2105 macro(_notified_offset, k, "notified", bool_signature, false); \
2106 macro(_timeout_offset, k, "timeout", long_signature, false);
2107
2108
2109 void java_lang_VirtualThread::compute_offsets() {
2110 InstanceKlass* k = vmClasses::VirtualThread_klass();
2111 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2112 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2113 }
2114
2115 bool java_lang_VirtualThread::is_instance(oop obj) {
2116 return obj != nullptr && is_subclass(obj->klass());
2117 }
2118
2119 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
2120 oop thread = vthread->obj_field(_carrierThread_offset);
2121 return thread;
2122 }
2123
2124 oop java_lang_VirtualThread::continuation(oop vthread) {
2125 oop cont = vthread->obj_field(_continuation_offset);
2126 return cont;
2127 }
2128
2129 int java_lang_VirtualThread::state(oop vthread) {
2130 return vthread->int_field_acquire(_state_offset);
2131 }
2132
2133 void java_lang_VirtualThread::set_state(oop vthread, int state) {
2134 vthread->release_int_field_put(_state_offset, state);
2135 }
2136
2137 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) {
2138 jint* addr = vthread->field_addr<jint>(_state_offset);
2139 int res = Atomic::cmpxchg(addr, old_state, new_state);
2140 return res;
2141 }
2142
2143 oop java_lang_VirtualThread::next(oop vthread) {
2144 return vthread->obj_field(_next_offset);
2145 }
2146
2147 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) {
2148 vthread->obj_field_put(_next_offset, next_vthread);
2149 }
2150
2151 // Add vthread to the waiting list if it's not already in it. Multiple threads
2152 // could be trying to add vthread to the list at the same time, so we control
2153 // access with a cmpxchg on onWaitingList. The winner adds vthread to the list.
2154 // Method returns true if we added vthread to the list, false otherwise.
2155 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) {
2156 jboolean* addr = vthread->field_addr<jboolean>(_onWaitingList_offset);
2157 jboolean vthread_on_list = Atomic::load(addr);
2158 if (!vthread_on_list) {
2159 vthread_on_list = Atomic::cmpxchg(addr, (jboolean)JNI_FALSE, (jboolean)JNI_TRUE);
2160 if (!vthread_on_list) {
2161 for (;;) {
2162 oop head = list_head.resolve();
2163 java_lang_VirtualThread::set_next(vthread, head);
2164 if (list_head.cmpxchg(head, vthread) == head) return true;
2165 }
2166 }
2167 }
2168 return false; // already on waiting list
2169 }
2170
2171 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) {
2172 vthread->bool_field_put_volatile(_notified_offset, value);
2173 }
2174
2175 jlong java_lang_VirtualThread::timeout(oop vthread) {
2176 return vthread->long_field(_timeout_offset);
2177 }
2178
2179 void java_lang_VirtualThread::set_timeout(oop vthread, jlong value) {
2180 vthread->long_field_put(_timeout_offset, value);
2181 }
2182
2183 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2184 JavaThreadStatus status = JavaThreadStatus::NEW;
2185 switch (state & ~SUSPENDED) {
2186 case NEW:
2187 status = JavaThreadStatus::NEW;
2188 break;
2189 case STARTED:
2190 case RUNNING:
2191 case PARKING:
2192 case TIMED_PARKING:
2193 case UNPARKED:
2194 case YIELDING:
2195 case YIELDED:
2196 case UNBLOCKED:
2197 case WAITING:
2198 case TIMED_WAITING:
2199 status = JavaThreadStatus::RUNNABLE;
2200 break;
2201 case PARKED:
2202 case PINNED:
2203 status = JavaThreadStatus::PARKED;
2204 break;
2205 case TIMED_PARKED:
2206 case TIMED_PINNED:
2207 status = JavaThreadStatus::PARKED_TIMED;
2208 break;
2209 case BLOCKING:
2210 case BLOCKED:
2211 status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER;
2212 break;
2213 case WAIT:
2214 status = JavaThreadStatus::IN_OBJECT_WAIT;
2215 break;
2216 case TIMED_WAIT:
2217 status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED;
2218 break;
2219 case TERMINATED:
2220 status = JavaThreadStatus::TERMINATED;
2221 break;
2222 default:
2223 ShouldNotReachHere();
2224 }
2225 return status;
2226 }
2227
2228 ObjectMonitor* java_lang_VirtualThread::current_pending_monitor(oop vthread) {
2229 ObjectWaiter* waiter = objectWaiter(vthread);
2230 if (waiter != nullptr && waiter->at_monitorenter()) {
2231 return waiter->monitor();
2232 }
2233 return nullptr;
2234 }
2235
2236 ObjectMonitor* java_lang_VirtualThread::current_waiting_monitor(oop vthread) {
2237 ObjectWaiter* waiter = objectWaiter(vthread);
2238 if (waiter != nullptr && waiter->is_wait()) {
2239 return waiter->monitor();
2240 }
2241 return nullptr;
2242 }
2243
2244 bool java_lang_VirtualThread::is_preempted(oop vthread) {
2245 oop continuation = java_lang_VirtualThread::continuation(vthread);
2246 assert(continuation != nullptr, "vthread with no continuation");
2247 stackChunkOop chunk = jdk_internal_vm_Continuation::tail(continuation);
2248 return chunk != nullptr && chunk->preempted();
2249 }
2250
2251 #if INCLUDE_CDS
2252 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2253 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2254 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2255 }
2256 #endif
2257
2258 // java_lang_Throwable
2259
2260 int java_lang_Throwable::_backtrace_offset;
2261 int java_lang_Throwable::_detailMessage_offset;
2262 int java_lang_Throwable::_stackTrace_offset;
2263 int java_lang_Throwable::_depth_offset;
2264 int java_lang_Throwable::_cause_offset;
2265 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2266
2267 #define THROWABLE_FIELDS_DO(macro) \
2268 macro(_backtrace_offset, k, "backtrace", object_signature, false); \
2269 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \
2270 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2271 macro(_depth_offset, k, "depth", int_signature, false); \
2272 macro(_cause_offset, k, "cause", throwable_signature, false); \
2273 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2274
2275 void java_lang_Throwable::compute_offsets() {
2276 InstanceKlass* k = vmClasses::Throwable_klass();
2277 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2278 }
2279
2280 #if INCLUDE_CDS
2281 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2282 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2283 }
2284 #endif
2285
2286 oop java_lang_Throwable::unassigned_stacktrace() {
2287 InstanceKlass* ik = vmClasses::Throwable_klass();
2288 oop base = ik->static_field_base_raw();
2289 return base->obj_field(_static_unassigned_stacktrace_offset);
2290 }
2291
2292 oop java_lang_Throwable::backtrace(oop throwable) {
2293 return throwable->obj_field_acquire(_backtrace_offset);
2294 }
2295
2296
2297 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2298 throwable->release_obj_field_put(_backtrace_offset, value);
2299 }
2300
2301 int java_lang_Throwable::depth(oop throwable) {
2302 return throwable->int_field(_depth_offset);
2303 }
2304
2305 void java_lang_Throwable::set_depth(oop throwable, int value) {
2306 throwable->int_field_put(_depth_offset, value);
2307 }
2308
2309 oop java_lang_Throwable::message(oop throwable) {
2310 return throwable->obj_field(_detailMessage_offset);
2311 }
2312
2313 const char* java_lang_Throwable::message_as_utf8(oop throwable) {
2314 oop msg = java_lang_Throwable::message(throwable);
2315 const char* msg_utf8 = nullptr;
2316 if (msg != nullptr) {
2317 msg_utf8 = java_lang_String::as_utf8_string(msg);
2318 }
2319 return msg_utf8;
2320 }
2321
2322 oop java_lang_Throwable::cause(oop throwable) {
2323 return throwable->obj_field(_cause_offset);
2324 }
2325
2326 void java_lang_Throwable::set_message(oop throwable, oop value) {
2327 throwable->obj_field_put(_detailMessage_offset, value);
2328 }
2329
2330
2331 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2332 throwable->obj_field_put(_stackTrace_offset, st_element_array);
2333 }
2334
2335 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2336 set_stacktrace(throwable, nullptr);
2337 }
2338
2339
2340 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2341 ResourceMark rm;
2342 Klass* k = throwable->klass();
2343 assert(k != nullptr, "just checking");
2344 st->print("%s", k->external_name());
2345 oop msg = message(throwable);
2346 if (msg != nullptr) {
2347 st->print(": %s", java_lang_String::as_utf8_string(msg));
2348 }
2349 }
2350
2351 // After this many redefines, the stack trace is unreliable.
2352 const int MAX_VERSION = USHRT_MAX;
2353
2354 static inline bool version_matches(Method* method, int version) {
2355 assert(version < MAX_VERSION, "version is too big");
2356 return method != nullptr && (method->constants()->version() == version);
2357 }
2358
2359 // This class provides a simple wrapper over the internal structure of
2360 // exception backtrace to insulate users of the backtrace from needing
2361 // to know what it looks like.
2362 // The code of this class is not GC safe. Allocations can only happen
2363 // in expand().
2364 class BacktraceBuilder: public StackObj {
2365 friend class BacktraceIterator;
2366 private:
2367 Handle _backtrace;
2368 objArrayOop _head;
2369 typeArrayOop _methods;
2370 typeArrayOop _bcis;
2371 objArrayOop _mirrors;
2372 typeArrayOop _names; // Needed to insulate method name against redefinition.
2373 // True if the top frame of the backtrace is omitted because it shall be hidden.
2374 bool _has_hidden_top_frame;
2375 int _index;
2376 NoSafepointVerifier _nsv;
2377
2378 enum {
2379 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2380 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2381 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2382 trace_names_offset = java_lang_Throwable::trace_names_offset,
2383 trace_conts_offset = java_lang_Throwable::trace_conts_offset,
2384 trace_next_offset = java_lang_Throwable::trace_next_offset,
2385 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2386 trace_size = java_lang_Throwable::trace_size,
2387 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2388 };
2389
2390 // get info out of chunks
2391 static typeArrayOop get_methods(objArrayHandle chunk) {
2392 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2393 assert(methods != nullptr, "method array should be initialized in backtrace");
2394 return methods;
2395 }
2396 static typeArrayOop get_bcis(objArrayHandle chunk) {
2397 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2398 assert(bcis != nullptr, "bci array should be initialized in backtrace");
2399 return bcis;
2400 }
2401 static objArrayOop get_mirrors(objArrayHandle chunk) {
2402 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2403 assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2404 return mirrors;
2405 }
2406 static typeArrayOop get_names(objArrayHandle chunk) {
2407 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2408 assert(names != nullptr, "names array should be initialized in backtrace");
2409 return names;
2410 }
2411 static bool has_hidden_top_frame(objArrayHandle chunk) {
2412 oop hidden = chunk->obj_at(trace_hidden_offset);
2413 return hidden != nullptr;
2414 }
2415
2416 public:
2417
2418 // constructor for new backtrace
2419 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2420 expand(CHECK);
2421 _backtrace = Handle(THREAD, _head);
2422 _index = 0;
2423 }
2424
2425 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2426 _methods = get_methods(backtrace);
2427 _bcis = get_bcis(backtrace);
2428 _mirrors = get_mirrors(backtrace);
2429 _names = get_names(backtrace);
2430 _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2431 assert(_methods->length() == _bcis->length() &&
2432 _methods->length() == _mirrors->length() &&
2433 _mirrors->length() == _names->length(),
2434 "method and source information arrays should match");
2435
2436 // head is the preallocated backtrace
2437 _head = backtrace();
2438 _backtrace = Handle(thread, _head);
2439 _index = 0;
2440 }
2441
2442 void expand(TRAPS) {
2443 objArrayHandle old_head(THREAD, _head);
2444 PauseNoSafepointVerifier pnsv(&_nsv);
2445
2446 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2447 objArrayHandle new_head(THREAD, head);
2448
2449 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2450 typeArrayHandle new_methods(THREAD, methods);
2451
2452 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2453 typeArrayHandle new_bcis(THREAD, bcis);
2454
2455 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2456 objArrayHandle new_mirrors(THREAD, mirrors);
2457
2458 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2459 typeArrayHandle new_names(THREAD, names);
2460
2461 if (!old_head.is_null()) {
2462 old_head->obj_at_put(trace_next_offset, new_head());
2463 }
2464 new_head->obj_at_put(trace_methods_offset, new_methods());
2465 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2466 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2467 new_head->obj_at_put(trace_names_offset, new_names());
2468 new_head->obj_at_put(trace_hidden_offset, nullptr);
2469
2470 _head = new_head();
2471 _methods = new_methods();
2472 _bcis = new_bcis();
2473 _mirrors = new_mirrors();
2474 _names = new_names();
2475 _index = 0;
2476 }
2477
2478 oop backtrace() {
2479 return _backtrace();
2480 }
2481
2482 inline void push(Method* method, int bci, TRAPS) {
2483 // Smear the -1 bci to 0 since the array only holds unsigned
2484 // shorts. The later line number lookup would just smear the -1
2485 // to a 0 even if it could be recorded.
2486 if (bci == SynchronizationEntryBCI) bci = 0;
2487
2488 if (_index >= trace_chunk_size) {
2489 methodHandle mhandle(THREAD, method);
2490 expand(CHECK);
2491 method = mhandle();
2492 }
2493
2494 _methods->ushort_at_put(_index, method->orig_method_idnum());
2495 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2496
2497 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2498 // klass owning the symbols alive so their refcounts aren't decremented.
2499 Symbol* name = method->name();
2500 _names->symbol_at_put(_index, name);
2501
2502 // We need to save the mirrors in the backtrace to keep the class
2503 // from being unloaded while we still have this stack trace.
2504 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2505 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2506
2507 _index++;
2508 }
2509
2510 void set_has_hidden_top_frame() {
2511 if (!_has_hidden_top_frame) {
2512 // It would be nice to add java/lang/Boolean::TRUE here
2513 // to indicate that this backtrace has a hidden top frame.
2514 // But this code is used before TRUE is allocated.
2515 // Therefore let's just use an arbitrary legal oop
2516 // available right here. _methods is a short[].
2517 assert(_methods != nullptr, "we need a legal oop");
2518 _has_hidden_top_frame = true;
2519 _head->obj_at_put(trace_hidden_offset, _methods);
2520 }
2521 }
2522 };
2523
2524 struct BacktraceElement : public StackObj {
2525 int _method_id;
2526 int _bci;
2527 int _version;
2528 Symbol* _name;
2529 Handle _mirror;
2530 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2531 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2532 };
2533
2534 class BacktraceIterator : public StackObj {
2535 int _index;
2536 objArrayHandle _result;
2537 objArrayHandle _mirrors;
2538 typeArrayHandle _methods;
2539 typeArrayHandle _bcis;
2540 typeArrayHandle _names;
2541
2542 void init(objArrayHandle result, Thread* thread) {
2543 // Get method id, bci, version and mirror from chunk
2544 _result = result;
2545 if (_result.not_null()) {
2546 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2547 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2548 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2549 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2550 _index = 0;
2551 }
2552 }
2553 public:
2554 BacktraceIterator(objArrayHandle result, Thread* thread) {
2555 init(result, thread);
2556 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2557 }
2558
2559 BacktraceElement next(Thread* thread) {
2560 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2561 _methods->ushort_at(_index),
2562 Backtrace::version_at(_bcis->int_at(_index)),
2563 Backtrace::bci_at(_bcis->int_at(_index)),
2564 _names->symbol_at(_index));
2565 _index++;
2566
2567 if (_index >= java_lang_Throwable::trace_chunk_size) {
2568 int next_offset = java_lang_Throwable::trace_next_offset;
2569 // Get next chunk
2570 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2571 init(result, thread);
2572 }
2573 return e;
2574 }
2575
2576 bool repeat() {
2577 return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2578 }
2579 };
2580
2581
2582 // Print stack trace element to resource allocated buffer
2583 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2584 int version, int bci, Symbol* name) {
2585 ResourceMark rm;
2586
2587 // Get strings and string lengths
2588 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2589 const char* klass_name = holder->external_name();
2590 int buf_len = (int)strlen(klass_name);
2591
2592 char* method_name = name->as_C_string();
2593 buf_len += (int)strlen(method_name);
2594
2595 char* source_file_name = nullptr;
2596 Symbol* source = Backtrace::get_source_file_name(holder, version);
2597 if (source != nullptr) {
2598 source_file_name = source->as_C_string();
2599 buf_len += (int)strlen(source_file_name);
2600 }
2601
2602 char *module_name = nullptr, *module_version = nullptr;
2603 ModuleEntry* module = holder->module();
2604 if (module->is_named()) {
2605 module_name = module->name()->as_C_string();
2606 buf_len += (int)strlen(module_name);
2607 if (module->version() != nullptr) {
2608 module_version = module->version()->as_C_string();
2609 buf_len += (int)strlen(module_version);
2610 }
2611 }
2612
2613 // Allocate temporary buffer with extra space for formatting and line number
2614 const size_t buf_size = buf_len + 64;
2615 char* buf = NEW_RESOURCE_ARRAY(char, buf_size);
2616
2617 // Print stack trace line in buffer
2618 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name);
2619
2620 // Print module information
2621 if (module_name != nullptr) {
2622 if (module_version != nullptr) {
2623 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version);
2624 } else {
2625 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name);
2626 }
2627 }
2628
2629 // The method can be null if the requested class version is gone
2630 Method* method = holder->method_with_orig_idnum(method_id, version);
2631 if (!version_matches(method, version)) {
2632 strcat(buf, "Redefined)");
2633 } else {
2634 int line_number = Backtrace::get_line_number(method, bci);
2635 if (line_number == -2) {
2636 strcat(buf, "Native Method)");
2637 } else {
2638 if (source_file_name != nullptr && (line_number != -1)) {
2639 // Sourcename and linenumber
2640 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number);
2641 } else if (source_file_name != nullptr) {
2642 // Just sourcename
2643 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name);
2644 } else {
2645 // Neither sourcename nor linenumber
2646 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)");
2647 }
2648 nmethod* nm = method->code();
2649 if (WizardMode && nm != nullptr) {
2650 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2651 }
2652 }
2653 }
2654
2655 st->print_cr("%s", buf);
2656 }
2657
2658 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2659 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2660 int method_id = method->orig_method_idnum();
2661 int version = method->constants()->version();
2662 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2663 }
2664
2665 /**
2666 * Print the throwable message and its stack trace plus all causes by walking the
2667 * cause chain. The output looks the same as of Throwable.printStackTrace().
2668 */
2669 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2670 // First, print the message.
2671 print(throwable(), st);
2672 st->cr();
2673
2674 // Now print the stack trace.
2675 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2676 while (throwable.not_null()) {
2677 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2678 if (result.is_null()) {
2679 st->print_raw_cr("\t<<no stack trace available>>");
2680 return;
2681 }
2682 BacktraceIterator iter(result, THREAD);
2683
2684 while (iter.repeat()) {
2685 BacktraceElement bte = iter.next(THREAD);
2686 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2687 }
2688 if (THREAD->can_call_java()) {
2689 // Call getCause() which doesn't necessarily return the _cause field.
2690 ExceptionMark em(THREAD);
2691 JavaValue cause(T_OBJECT);
2692 JavaCalls::call_virtual(&cause,
2693 throwable,
2694 throwable->klass(),
2695 vmSymbols::getCause_name(),
2696 vmSymbols::void_throwable_signature(),
2697 THREAD);
2698 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2699 if (HAS_PENDING_EXCEPTION) {
2700 CLEAR_PENDING_EXCEPTION;
2701 throwable = Handle();
2702 } else {
2703 throwable = Handle(THREAD, cause.get_oop());
2704 if (throwable.not_null()) {
2705 st->print("Caused by: ");
2706 print(throwable(), st);
2707 st->cr();
2708 }
2709 }
2710 } else {
2711 st->print_raw_cr("<<cannot call Java to get cause>>");
2712 return;
2713 }
2714 }
2715 }
2716
2717 /**
2718 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2719 */
2720 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2721 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2722 JavaValue result(T_VOID);
2723 JavaCalls::call_virtual(&result,
2724 throwable,
2725 vmClasses::Throwable_klass(),
2726 vmSymbols::printStackTrace_name(),
2727 vmSymbols::void_method_signature(),
2728 THREAD);
2729 }
2730
2731 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2732 if (!StackTraceInThrowable) return;
2733 ResourceMark rm(THREAD);
2734
2735 // Start out by clearing the backtrace for this object, in case the VM
2736 // runs out of memory while allocating the stack trace
2737 set_backtrace(throwable(), nullptr);
2738 // Clear lazily constructed Java level stacktrace if refilling occurs
2739 // This is unnecessary in 1.7+ but harmless
2740 clear_stacktrace(throwable());
2741
2742 int max_depth = MaxJavaStackTraceDepth;
2743 JavaThread* thread = THREAD;
2744
2745 BacktraceBuilder bt(CHECK);
2746
2747 // If there is no Java frame just return the method that was being called
2748 // with bci 0
2749 if (!thread->has_last_Java_frame()) {
2750 if (max_depth >= 1 && method() != nullptr) {
2751 bt.push(method(), 0, CHECK);
2752 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2753 set_depth(throwable(), 1);
2754 set_backtrace(throwable(), bt.backtrace());
2755 }
2756 return;
2757 }
2758
2759 // Instead of using vframe directly, this version of fill_in_stack_trace
2760 // basically handles everything by hand. This significantly improved the
2761 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2762 // See bug 6333838 for more details.
2763 // The "ASSERT" here is to verify this method generates the exactly same stack
2764 // trace as utilizing vframe.
2765 #ifdef ASSERT
2766 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2767 #endif
2768 int total_count = 0;
2769 RegisterMap map(thread,
2770 RegisterMap::UpdateMap::skip,
2771 RegisterMap::ProcessFrames::skip,
2772 RegisterMap::WalkContinuation::include);
2773 int decode_offset = 0;
2774 nmethod* nm = nullptr;
2775 bool skip_fillInStackTrace_check = false;
2776 bool skip_throwableInit_check = false;
2777 bool skip_hidden = !ShowHiddenFrames;
2778 bool show_carrier = ShowCarrierFrames;
2779 ContinuationEntry* cont_entry = thread->last_continuation();
2780 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2781 Method* method = nullptr;
2782 int bci = 0;
2783
2784 // Compiled java method case.
2785 if (decode_offset != 0) {
2786 DebugInfoReadStream stream(nm, decode_offset);
2787 decode_offset = stream.read_int();
2788 method = (Method*)nm->metadata_at(stream.read_int());
2789 bci = stream.read_bci();
2790 } else {
2791 if (fr.is_first_frame()) break;
2792
2793 if (Continuation::is_continuation_enterSpecial(fr)) {
2794 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2795 if (!show_carrier && cont_entry->is_virtual_thread()) {
2796 break;
2797 }
2798 cont_entry = cont_entry->parent();
2799 }
2800
2801 address pc = fr.pc();
2802 if (fr.is_interpreted_frame()) {
2803 address bcp;
2804 if (!map.in_cont()) {
2805 bcp = fr.interpreter_frame_bcp();
2806 method = fr.interpreter_frame_method();
2807 } else {
2808 bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2809 method = map.stack_chunk()->interpreter_frame_method(fr);
2810 }
2811 bci = method->bci_from(bcp);
2812 fr = fr.sender(&map);
2813 } else {
2814 CodeBlob* cb = fr.cb();
2815 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2816 // but non nmethod
2817 fr = fr.sender(&map);
2818 if (cb == nullptr || !cb->is_nmethod()) {
2819 continue;
2820 }
2821 nm = cb->as_nmethod();
2822 assert(nm->method() != nullptr, "must be");
2823 if (nm->method()->is_native()) {
2824 method = nm->method();
2825 bci = 0;
2826 } else {
2827 PcDesc* pd = nm->pc_desc_at(pc);
2828 decode_offset = pd->scope_decode_offset();
2829 // if decode_offset is not equal to 0, it will execute the
2830 // "compiled java method case" at the beginning of the loop.
2831 continue;
2832 }
2833 }
2834 }
2835 #ifdef ASSERT
2836 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2837 assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2838 st.next();
2839 }
2840 #endif
2841
2842 // the format of the stacktrace will be:
2843 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2844 // - 0 or more <init> methods for the exception class (skipped)
2845 // - rest of the stack
2846
2847 if (!skip_fillInStackTrace_check) {
2848 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2849 throwable->is_a(method->method_holder())) {
2850 continue;
2851 }
2852 else {
2853 skip_fillInStackTrace_check = true; // gone past them all
2854 }
2855 }
2856 if (!skip_throwableInit_check) {
2857 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2858
2859 // skip <init> methods of the exception class and superclasses
2860 // This is similar to classic VM.
2861 if (method->is_object_constructor() &&
2862 throwable->is_a(method->method_holder())) {
2863 continue;
2864 } else {
2865 // there are none or we've seen them all - either way stop checking
2866 skip_throwableInit_check = true;
2867 }
2868 }
2869 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2870 if (skip_hidden) {
2871 if (total_count == 0) {
2872 // The top frame will be hidden from the stack trace.
2873 bt.set_has_hidden_top_frame();
2874 }
2875 continue;
2876 }
2877 }
2878
2879 bt.push(method, bci, CHECK);
2880 total_count++;
2881 }
2882
2883 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2884
2885 // Put completed stack trace into throwable object
2886 set_backtrace(throwable(), bt.backtrace());
2887 set_depth(throwable(), total_count);
2888 }
2889
2890 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2891 // No-op if stack trace is disabled
2892 if (!StackTraceInThrowable) {
2893 return;
2894 }
2895
2896 // Disable stack traces for some preallocated out of memory errors
2897 if (!Universe::should_fill_in_stack_trace(throwable)) {
2898 return;
2899 }
2900
2901 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2902 PreserveExceptionMark pm(THREAD);
2903
2904 fill_in_stack_trace(throwable, method, THREAD);
2905 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2906 // original exception via the PreserveExceptionMark destructor.
2907 CLEAR_PENDING_EXCEPTION;
2908 }
2909
2910 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2911 // Allocate stack trace - backtrace is created but not filled in
2912
2913 // No-op if stack trace is disabled
2914 if (!StackTraceInThrowable) return;
2915 BacktraceBuilder bt(CHECK); // creates a backtrace
2916 set_backtrace(throwable(), bt.backtrace());
2917 }
2918
2919
2920 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2921 // Fill in stack trace into preallocated backtrace (no GC)
2922
2923 // No-op if stack trace is disabled
2924 if (!StackTraceInThrowable) return;
2925
2926 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2927
2928 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2929
2930 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2931 assert(backtrace.not_null(), "backtrace should have been preallocated");
2932
2933 ResourceMark rm(THREAD);
2934 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2935
2936 BacktraceBuilder bt(THREAD, backtrace);
2937
2938 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2939 // methods as preallocated errors aren't created by "java" code.
2940
2941 // fill in as much stack trace as possible
2942 int chunk_count = 0;
2943 for (;!st.at_end(); st.next()) {
2944 bt.push(st.method(), st.bci(), CHECK);
2945 chunk_count++;
2946
2947 // Bail-out for deep stacks
2948 if (chunk_count >= trace_chunk_size) break;
2949 }
2950 set_depth(throwable(), chunk_count);
2951 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2952
2953 // We support the Throwable immutability protocol defined for Java 7.
2954 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2955 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2956 }
2957
2958 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2959 objArrayHandle stack_trace_array_h, TRAPS) {
2960
2961 if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2962 THROW(vmSymbols::java_lang_NullPointerException());
2963 }
2964
2965 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2966
2967 if (stack_trace_array_h->length() != depth) {
2968 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2969 }
2970
2971 objArrayHandle result(THREAD, objArrayOop(backtrace()));
2972 BacktraceIterator iter(result, THREAD);
2973
2974 int index = 0;
2975 while (iter.repeat()) {
2976 BacktraceElement bte = iter.next(THREAD);
2977
2978 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2979
2980 if (stack_trace_element.is_null()) {
2981 THROW(vmSymbols::java_lang_NullPointerException());
2982 }
2983
2984 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2985 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2986
2987 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2988 method,
2989 bte._version,
2990 bte._bci,
2991 bte._name,
2992 CHECK);
2993 }
2994 }
2995
2996 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
2997 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
2998 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
2999 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
3000 // symbolic stacktrace of 'throwable'.
3001 assert(throwable.not_null(), "shouldn't be");
3002
3003 // Now create the message from the original exception and thread name.
3004 ResourceMark rm(current);
3005 const char *message = nullptr;
3006 oop detailed_message = java_lang_Throwable::message(throwable());
3007 if (detailed_message != nullptr) {
3008 message = java_lang_String::as_utf8_string(detailed_message);
3009 }
3010 stringStream st;
3011 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
3012 message == nullptr ? "" : ":");
3013 if (message == nullptr) {
3014 st.print("[in thread \"%s\"]", current->name());
3015 } else {
3016 st.print("%s [in thread \"%s\"]", message, current->name());
3017 }
3018
3019 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
3020 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
3021 // If new_exception returns a different exception while creating the exception,
3022 // abandon the attempt to save the initialization error and return null.
3023 if (init_error->klass()->name() != exception_name) {
3024 log_info(class, init)("Exception %s thrown while saving initialization exception",
3025 init_error->klass()->external_name());
3026 return Handle();
3027 }
3028
3029 // Call to java to fill in the stack trace and clear declaringClassObject to
3030 // not keep classes alive in the stack trace.
3031 // call this: public StackTraceElement[] getStackTrace()
3032 JavaValue result(T_ARRAY);
3033 JavaCalls::call_virtual(&result, throwable,
3034 vmClasses::Throwable_klass(),
3035 vmSymbols::getStackTrace_name(),
3036 vmSymbols::getStackTrace_signature(),
3037 current);
3038 if (!current->has_pending_exception()){
3039 Handle stack_trace(current, result.get_oop());
3040 assert(stack_trace->is_objArray(), "Should be an array");
3041 java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
3042 // Clear backtrace because the stacktrace should be used instead.
3043 set_backtrace(init_error(), nullptr);
3044 } else {
3045 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
3046 init_error->klass()->external_name());
3047 current->clear_pending_exception();
3048 }
3049
3050 return init_error;
3051 }
3052
3053 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
3054 JavaThread* current = JavaThread::current();
3055 objArrayHandle result(current, objArrayOop(backtrace(throwable)));
3056 BacktraceIterator iter(result, current);
3057 // No backtrace available.
3058 if (!iter.repeat()) return false;
3059
3060 // If the exception happened in a frame that has been hidden, i.e.,
3061 // omitted from the back trace, we can not compute the message.
3062 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
3063 if (hidden != nullptr) {
3064 return false;
3065 }
3066
3067 // Get first backtrace element.
3068 BacktraceElement bte = iter.next(current);
3069
3070 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
3071 assert(holder != nullptr, "first element should be non-null");
3072 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
3073
3074 // Original version is no longer available.
3075 if (m == nullptr || !version_matches(m, bte._version)) {
3076 return false;
3077 }
3078
3079 *method = m;
3080 *bci = bte._bci;
3081 return true;
3082 }
3083
3084 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
3085 // Allocate java.lang.StackTraceElement instance
3086 InstanceKlass* k = vmClasses::StackTraceElement_klass();
3087 assert(k != nullptr, "must be loaded in 1.4+");
3088 if (k->should_be_initialized()) {
3089 k->initialize(CHECK_NULL);
3090 }
3091
3092 Handle element = k->allocate_instance_handle(CHECK_NULL);
3093
3094 int version = method->constants()->version();
3095 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
3096 return element();
3097 }
3098
3099 void java_lang_StackTraceElement::fill_in(Handle element,
3100 InstanceKlass* holder, const methodHandle& method,
3101 int version, int bci, Symbol* name, TRAPS) {
3102 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
3103
3104 ResourceMark rm(THREAD);
3105 HandleMark hm(THREAD);
3106
3107 // Fill in class name
3108 Handle java_class(THREAD, holder->java_mirror());
3109 oop classname = java_lang_Class::name(java_class, CHECK);
3110 java_lang_StackTraceElement::set_declaringClass(element(), classname);
3111 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
3112
3113 oop loader = holder->class_loader();
3114 if (loader != nullptr) {
3115 oop loader_name = java_lang_ClassLoader::name(loader);
3116 if (loader_name != nullptr)
3117 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
3118 }
3119
3120 // Fill in method name
3121 oop methodname = StringTable::intern(name, CHECK);
3122 java_lang_StackTraceElement::set_methodName(element(), methodname);
3123
3124 // Fill in module name and version
3125 ModuleEntry* module = holder->module();
3126 if (module->is_named()) {
3127 oop module_name = StringTable::intern(module->name(), CHECK);
3128 java_lang_StackTraceElement::set_moduleName(element(), module_name);
3129 oop module_version;
3130 if (module->version() != nullptr) {
3131 module_version = StringTable::intern(module->version(), CHECK);
3132 } else {
3133 module_version = nullptr;
3134 }
3135 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
3136 }
3137
3138 if (method() == nullptr || !version_matches(method(), version)) {
3139 // The method was redefined, accurate line number information isn't available
3140 java_lang_StackTraceElement::set_fileName(element(), nullptr);
3141 java_lang_StackTraceElement::set_lineNumber(element(), -1);
3142 } else {
3143 Symbol* source;
3144 oop source_file;
3145 int line_number;
3146 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
3147
3148 java_lang_StackTraceElement::set_fileName(element(), source_file);
3149 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
3150 }
3151 }
3152
3153 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
3154 InstanceKlass* holder,
3155 int version,
3156 const methodHandle& method,
3157 int bci,
3158 Symbol*& source,
3159 oop& source_file,
3160 int& line_number, TRAPS) {
3161 // Fill in source file name and line number.
3162 source = Backtrace::get_source_file_name(holder, version);
3163 source_file = java_lang_Class::source_file(java_class());
3164 if (source != nullptr) {
3165 // Class was not redefined. We can trust its cache if set,
3166 // else we have to initialize it.
3167 if (source_file == nullptr) {
3168 source_file = StringTable::intern(source, CHECK);
3169 java_lang_Class::set_source_file(java_class(), source_file);
3170 }
3171 } else {
3172 // Class was redefined. Dump the cache if it was set.
3173 if (source_file != nullptr) {
3174 source_file = nullptr;
3175 java_lang_Class::set_source_file(java_class(), source_file);
3176 }
3177 }
3178 line_number = Backtrace::get_line_number(method(), bci);
3179 }
3180
3181 #if INCLUDE_JVMCI
3182 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
3183 Symbol*& filename, int& line_number, TRAPS) {
3184 ResourceMark rm(THREAD);
3185 HandleMark hm(THREAD);
3186
3187 filename = nullptr;
3188 line_number = -1;
3189
3190 oop source_file;
3191 int version = method->constants()->version();
3192 InstanceKlass* holder = method->method_holder();
3193 Handle java_class(THREAD, holder->java_mirror());
3194 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
3195 }
3196 #endif // INCLUDE_JVMCI
3197
3198 // java_lang_ClassFrameInfo
3199
3200 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
3201 int java_lang_ClassFrameInfo::_flags_offset;
3202
3203 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
3204 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \
3205 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false)
3206
3207 void java_lang_ClassFrameInfo::compute_offsets() {
3208 InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
3209 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3210 }
3211
3212 #if INCLUDE_CDS
3213 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
3214 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3215 }
3216 #endif
3217
3218 static int get_flags(const methodHandle& m) {
3219 int flags = m->access_flags().as_method_flags();
3220 if (m->is_object_constructor()) {
3221 flags |= java_lang_invoke_MemberName::MN_IS_OBJECT_CONSTRUCTOR;
3222 } else {
3223 // Note: Static initializers can be here. Record them as plain methods.
3224 flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
3225 }
3226 if (m->caller_sensitive()) {
3227 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
3228 }
3229 if (m->is_hidden()) {
3230 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3231 }
3232 assert((flags & 0xFF000000) == 0, "unexpected flags");
3233 return flags;
3234 }
3235
3236 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3237 return obj->obj_field(_classOrMemberName_offset);
3238 }
3239
3240 int java_lang_ClassFrameInfo::flags(oop obj) {
3241 return obj->int_field(_flags_offset);
3242 }
3243
3244 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3245 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3246 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3247 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3248 stackFrame->int_field_put(_flags_offset, flags);
3249 }
3250
3251 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3252 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3253 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3254 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3255 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3256 stackFrame->int_field_put(_flags_offset, flags);
3257 }
3258
3259
3260 // java_lang_StackFrameInfo
3261
3262 int java_lang_StackFrameInfo::_type_offset;
3263 int java_lang_StackFrameInfo::_name_offset;
3264 int java_lang_StackFrameInfo::_bci_offset;
3265 int java_lang_StackFrameInfo::_version_offset;
3266 int java_lang_StackFrameInfo::_contScope_offset;
3267
3268 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3269 macro(_type_offset, k, "type", object_signature, false); \
3270 macro(_name_offset, k, "name", string_signature, false); \
3271 macro(_bci_offset, k, "bci", int_signature, false); \
3272 macro(_contScope_offset, k, "contScope", continuationscope_signature, false)
3273
3274 void java_lang_StackFrameInfo::compute_offsets() {
3275 InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3276 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3277 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3278 }
3279
3280 #if INCLUDE_CDS
3281 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3282 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3283 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3284 }
3285 #endif
3286
3287 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3288 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3289 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3290 return method;
3291 }
3292
3293 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3294 // set Method* or mid/cpref
3295 HandleMark hm(THREAD);
3296 Handle cont_h(THREAD, cont);
3297 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3298
3299 // set bci
3300 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3301 // method may be redefined; store the version
3302 int version = method->constants()->version();
3303 assert((jushort)version == version, "version should be short");
3304 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3305
3306 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3307 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3308 }
3309
3310 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3311 ResourceMark rm(THREAD);
3312 HandleMark hm(THREAD);
3313
3314 Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3315 InstanceKlass* holder = method->method_holder();
3316 short version = stackFrame->short_field(_version_offset);
3317 int bci = stackFrame->int_field(_bci_offset);
3318 Symbol* name = method->name();
3319 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3320 }
3321
3322 oop java_lang_StackFrameInfo::type(oop obj) {
3323 return obj->obj_field(_type_offset);
3324 }
3325
3326 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3327 obj->obj_field_put(_type_offset, value);
3328 }
3329
3330 oop java_lang_StackFrameInfo::name(oop obj) {
3331 return obj->obj_field(_name_offset);
3332 }
3333
3334 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3335 obj->obj_field_put(_name_offset, value);
3336 }
3337
3338 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3339 obj->short_field_put(_version_offset, value);
3340 }
3341
3342 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3343 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3344 obj->int_field_put(_bci_offset, value);
3345 }
3346
3347 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3348 obj->obj_field_put(_contScope_offset, value);
3349 }
3350
3351 int java_lang_LiveStackFrameInfo::_monitors_offset;
3352 int java_lang_LiveStackFrameInfo::_locals_offset;
3353 int java_lang_LiveStackFrameInfo::_operands_offset;
3354 int java_lang_LiveStackFrameInfo::_mode_offset;
3355
3356 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3357 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
3358 macro(_locals_offset, k, "locals", object_array_signature, false); \
3359 macro(_operands_offset, k, "operands", object_array_signature, false); \
3360 macro(_mode_offset, k, "mode", int_signature, false)
3361
3362 void java_lang_LiveStackFrameInfo::compute_offsets() {
3363 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3364 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3365 }
3366
3367 #if INCLUDE_CDS
3368 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3369 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3370 }
3371 #endif
3372
3373 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3374 obj->obj_field_put(_monitors_offset, value);
3375 }
3376
3377 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3378 obj->obj_field_put(_locals_offset, value);
3379 }
3380
3381 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3382 obj->obj_field_put(_operands_offset, value);
3383 }
3384
3385 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3386 obj->int_field_put(_mode_offset, value);
3387 }
3388
3389
3390 // java_lang_AccessibleObject
3391
3392 int java_lang_reflect_AccessibleObject::_override_offset;
3393
3394 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3395 macro(_override_offset, k, "override", bool_signature, false)
3396
3397 void java_lang_reflect_AccessibleObject::compute_offsets() {
3398 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3399 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3400 }
3401
3402 #if INCLUDE_CDS
3403 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3404 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3405 }
3406 #endif
3407
3408 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3409 return (jboolean) reflect->bool_field(_override_offset);
3410 }
3411
3412 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3413 reflect->bool_field_put(_override_offset, (int) value);
3414 }
3415
3416 // java_lang_reflect_Method
3417
3418 int java_lang_reflect_Method::_clazz_offset;
3419 int java_lang_reflect_Method::_name_offset;
3420 int java_lang_reflect_Method::_returnType_offset;
3421 int java_lang_reflect_Method::_parameterTypes_offset;
3422 int java_lang_reflect_Method::_exceptionTypes_offset;
3423 int java_lang_reflect_Method::_slot_offset;
3424 int java_lang_reflect_Method::_modifiers_offset;
3425 int java_lang_reflect_Method::_signature_offset;
3426 int java_lang_reflect_Method::_annotations_offset;
3427 int java_lang_reflect_Method::_parameter_annotations_offset;
3428 int java_lang_reflect_Method::_annotation_default_offset;
3429
3430 #define METHOD_FIELDS_DO(macro) \
3431 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3432 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3433 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
3434 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3435 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3436 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3437 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3438 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3439 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3440 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3441 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
3442
3443 void java_lang_reflect_Method::compute_offsets() {
3444 InstanceKlass* k = vmClasses::reflect_Method_klass();
3445 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3446 }
3447
3448 #if INCLUDE_CDS
3449 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3450 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3451 }
3452 #endif
3453
3454 Handle java_lang_reflect_Method::create(TRAPS) {
3455 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3456 Klass* klass = vmClasses::reflect_Method_klass();
3457 // This class is eagerly initialized during VM initialization, since we keep a reference
3458 // to one of the methods
3459 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
3460 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
3461 }
3462
3463 oop java_lang_reflect_Method::clazz(oop reflect) {
3464 return reflect->obj_field(_clazz_offset);
3465 }
3466
3467 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3468 reflect->obj_field_put(_clazz_offset, value);
3469 }
3470
3471 int java_lang_reflect_Method::slot(oop reflect) {
3472 return reflect->int_field(_slot_offset);
3473 }
3474
3475 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3476 reflect->int_field_put(_slot_offset, value);
3477 }
3478
3479 void java_lang_reflect_Method::set_name(oop method, oop value) {
3480 method->obj_field_put(_name_offset, value);
3481 }
3482
3483 oop java_lang_reflect_Method::return_type(oop method) {
3484 return method->obj_field(_returnType_offset);
3485 }
3486
3487 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3488 method->obj_field_put(_returnType_offset, value);
3489 }
3490
3491 oop java_lang_reflect_Method::parameter_types(oop method) {
3492 return method->obj_field(_parameterTypes_offset);
3493 }
3494
3495 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3496 method->obj_field_put(_parameterTypes_offset, value);
3497 }
3498
3499 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3500 method->obj_field_put(_exceptionTypes_offset, value);
3501 }
3502
3503 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3504 method->int_field_put(_modifiers_offset, value);
3505 }
3506
3507 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3508 method->obj_field_put(_signature_offset, value);
3509 }
3510
3511 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3512 method->obj_field_put(_annotations_offset, value);
3513 }
3514
3515 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3516 method->obj_field_put(_parameter_annotations_offset, value);
3517 }
3518
3519 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3520 method->obj_field_put(_annotation_default_offset, value);
3521 }
3522
3523 int java_lang_reflect_Constructor::_clazz_offset;
3524 int java_lang_reflect_Constructor::_parameterTypes_offset;
3525 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3526 int java_lang_reflect_Constructor::_slot_offset;
3527 int java_lang_reflect_Constructor::_modifiers_offset;
3528 int java_lang_reflect_Constructor::_signature_offset;
3529 int java_lang_reflect_Constructor::_annotations_offset;
3530 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3531
3532 #define CONSTRUCTOR_FIELDS_DO(macro) \
3533 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3534 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3535 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3536 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3537 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3538 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3539 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3540 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3541
3542 void java_lang_reflect_Constructor::compute_offsets() {
3543 InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3544 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3545 }
3546
3547 #if INCLUDE_CDS
3548 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3549 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3550 }
3551 #endif
3552
3553 Handle java_lang_reflect_Constructor::create(TRAPS) {
3554 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3555 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3556 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3557 InstanceKlass* ik = InstanceKlass::cast(k);
3558 // Ensure it is initialized
3559 ik->initialize(CHECK_NH);
3560 return ik->allocate_instance_handle(THREAD);
3561 }
3562
3563 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3564 return reflect->obj_field(_clazz_offset);
3565 }
3566
3567 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3568 reflect->obj_field_put(_clazz_offset, value);
3569 }
3570
3571 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3572 return constructor->obj_field(_parameterTypes_offset);
3573 }
3574
3575 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3576 constructor->obj_field_put(_parameterTypes_offset, value);
3577 }
3578
3579 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3580 constructor->obj_field_put(_exceptionTypes_offset, value);
3581 }
3582
3583 int java_lang_reflect_Constructor::slot(oop reflect) {
3584 return reflect->int_field(_slot_offset);
3585 }
3586
3587 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3588 reflect->int_field_put(_slot_offset, value);
3589 }
3590
3591 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3592 constructor->int_field_put(_modifiers_offset, value);
3593 }
3594
3595 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3596 constructor->obj_field_put(_signature_offset, value);
3597 }
3598
3599 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3600 constructor->obj_field_put(_annotations_offset, value);
3601 }
3602
3603 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3604 method->obj_field_put(_parameter_annotations_offset, value);
3605 }
3606
3607 int java_lang_reflect_Field::_clazz_offset;
3608 int java_lang_reflect_Field::_name_offset;
3609 int java_lang_reflect_Field::_type_offset;
3610 int java_lang_reflect_Field::_slot_offset;
3611 int java_lang_reflect_Field::_modifiers_offset;
3612 int java_lang_reflect_Field::_flags_offset;
3613 int java_lang_reflect_Field::_signature_offset;
3614 int java_lang_reflect_Field::_annotations_offset;
3615
3616 #define FIELD_FIELDS_DO(macro) \
3617 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3618 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3619 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \
3620 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3621 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3622 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3623 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3624 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3625
3626 void java_lang_reflect_Field::compute_offsets() {
3627 InstanceKlass* k = vmClasses::reflect_Field_klass();
3628 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3629 }
3630
3631 #if INCLUDE_CDS
3632 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3633 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3634 }
3635 #endif
3636
3637 Handle java_lang_reflect_Field::create(TRAPS) {
3638 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3639 Symbol* name = vmSymbols::java_lang_reflect_Field();
3640 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3641 InstanceKlass* ik = InstanceKlass::cast(k);
3642 // Ensure it is initialized
3643 ik->initialize(CHECK_NH);
3644 return ik->allocate_instance_handle(THREAD);
3645 }
3646
3647 oop java_lang_reflect_Field::clazz(oop reflect) {
3648 return reflect->obj_field(_clazz_offset);
3649 }
3650
3651 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3652 reflect->obj_field_put(_clazz_offset, value);
3653 }
3654
3655 oop java_lang_reflect_Field::name(oop field) {
3656 return field->obj_field(_name_offset);
3657 }
3658
3659 void java_lang_reflect_Field::set_name(oop field, oop value) {
3660 field->obj_field_put(_name_offset, value);
3661 }
3662
3663 oop java_lang_reflect_Field::type(oop field) {
3664 return field->obj_field(_type_offset);
3665 }
3666
3667 void java_lang_reflect_Field::set_type(oop field, oop value) {
3668 field->obj_field_put(_type_offset, value);
3669 }
3670
3671 int java_lang_reflect_Field::slot(oop reflect) {
3672 return reflect->int_field(_slot_offset);
3673 }
3674
3675 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3676 reflect->int_field_put(_slot_offset, value);
3677 }
3678
3679 int java_lang_reflect_Field::modifiers(oop field) {
3680 return field->int_field(_modifiers_offset);
3681 }
3682
3683 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3684 field->int_field_put(_modifiers_offset, value);
3685 }
3686
3687 void java_lang_reflect_Field::set_flags(oop field, int value) {
3688 field->int_field_put(_flags_offset, value);
3689 }
3690
3691 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3692 field->obj_field_put(_signature_offset, value);
3693 }
3694
3695 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3696 field->obj_field_put(_annotations_offset, value);
3697 }
3698
3699 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3700 // Allocate java.lang.reflect.RecordComponent instance
3701 HandleMark hm(THREAD);
3702 InstanceKlass* ik = vmClasses::RecordComponent_klass();
3703 assert(ik != nullptr, "must be loaded");
3704 ik->initialize(CHECK_NULL);
3705
3706 Handle element = ik->allocate_instance_handle(CHECK_NULL);
3707
3708 Handle decl_class(THREAD, holder->java_mirror());
3709 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3710
3711 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3712 oop component_name = StringTable::intern(name, CHECK_NULL);
3713 java_lang_reflect_RecordComponent::set_name(element(), component_name);
3714
3715 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3716 Handle component_type_h =
3717 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3718 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3719
3720 Method* accessor_method = nullptr;
3721 {
3722 // Prepend "()" to type to create the full method signature.
3723 ResourceMark rm(THREAD);
3724 int sig_len = type->utf8_length() + 3; // "()" and null char
3725 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3726 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3727 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3728 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3729 }
3730
3731 if (accessor_method != nullptr) {
3732 methodHandle method(THREAD, accessor_method);
3733 oop m = Reflection::new_method(method, false, CHECK_NULL);
3734 java_lang_reflect_RecordComponent::set_accessor(element(), m);
3735 } else {
3736 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3737 }
3738
3739 int sig_index = component->generic_signature_index();
3740 if (sig_index > 0) {
3741 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3742 oop component_sig = StringTable::intern(sig, CHECK_NULL);
3743 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3744 } else {
3745 java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3746 }
3747
3748 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3749 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3750
3751 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3752 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3753
3754 return element();
3755 }
3756
3757 int reflect_ConstantPool::_oop_offset;
3758
3759 #define CONSTANTPOOL_FIELDS_DO(macro) \
3760 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3761
3762 void reflect_ConstantPool::compute_offsets() {
3763 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3764 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3765 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3766 }
3767
3768 #if INCLUDE_CDS
3769 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3770 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3771 }
3772 #endif
3773
3774 int java_lang_reflect_Parameter::_name_offset;
3775 int java_lang_reflect_Parameter::_modifiers_offset;
3776 int java_lang_reflect_Parameter::_index_offset;
3777 int java_lang_reflect_Parameter::_executable_offset;
3778
3779 #define PARAMETER_FIELDS_DO(macro) \
3780 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3781 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3782 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \
3783 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3784
3785 void java_lang_reflect_Parameter::compute_offsets() {
3786 InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3787 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3788 }
3789
3790 #if INCLUDE_CDS
3791 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3792 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3793 }
3794 #endif
3795
3796 Handle java_lang_reflect_Parameter::create(TRAPS) {
3797 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3798 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3799 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3800 InstanceKlass* ik = InstanceKlass::cast(k);
3801 // Ensure it is initialized
3802 ik->initialize(CHECK_NH);
3803 return ik->allocate_instance_handle(THREAD);
3804 }
3805
3806 oop java_lang_reflect_Parameter::name(oop param) {
3807 return param->obj_field(_name_offset);
3808 }
3809
3810 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3811 param->obj_field_put(_name_offset, value);
3812 }
3813
3814 int java_lang_reflect_Parameter::modifiers(oop param) {
3815 return param->int_field(_modifiers_offset);
3816 }
3817
3818 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3819 param->int_field_put(_modifiers_offset, value);
3820 }
3821
3822 int java_lang_reflect_Parameter::index(oop param) {
3823 return param->int_field(_index_offset);
3824 }
3825
3826 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3827 param->int_field_put(_index_offset, value);
3828 }
3829
3830 oop java_lang_reflect_Parameter::executable(oop param) {
3831 return param->obj_field(_executable_offset);
3832 }
3833
3834 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3835 param->obj_field_put(_executable_offset, value);
3836 }
3837
3838 // java_lang_Module
3839
3840 int java_lang_Module::_loader_offset;
3841 int java_lang_Module::_name_offset;
3842 int java_lang_Module::_module_entry_offset;
3843
3844 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3845 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3846 return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3847 vmSymbols::java_lang_module_init_signature(),
3848 loader, module_name, CHECK_NH);
3849 }
3850
3851 #define MODULE_FIELDS_DO(macro) \
3852 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3853 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false)
3854
3855 void java_lang_Module::compute_offsets() {
3856 InstanceKlass* k = vmClasses::Module_klass();
3857 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3858 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3859 }
3860
3861 #if INCLUDE_CDS
3862 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3863 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3864 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3865 }
3866 #endif
3867
3868 oop java_lang_Module::loader(oop module) {
3869 return module->obj_field(_loader_offset);
3870 }
3871
3872 void java_lang_Module::set_loader(oop module, oop value) {
3873 module->obj_field_put(_loader_offset, value);
3874 }
3875
3876 oop java_lang_Module::name(oop module) {
3877 return module->obj_field(_name_offset);
3878 }
3879
3880 void java_lang_Module::set_name(oop module, oop value) {
3881 module->obj_field_put(_name_offset, value);
3882 }
3883
3884 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3885 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3886 assert(module != nullptr, "module can't be null");
3887 assert(oopDesc::is_oop(module), "module must be oop");
3888
3889 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3890 return module_entry;
3891 }
3892
3893 ModuleEntry* java_lang_Module::module_entry(oop module) {
3894 ModuleEntry* module_entry = module_entry_raw(module);
3895 if (module_entry == nullptr) {
3896 // If the inject field containing the ModuleEntry* is null then return the
3897 // class loader's unnamed module.
3898 oop loader = java_lang_Module::loader(module);
3899 Handle h_loader = Handle(Thread::current(), loader);
3900 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3901 return loader_cld->unnamed_module();
3902 }
3903 return module_entry;
3904 }
3905
3906 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3907 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3908 assert(module != nullptr, "module can't be null");
3909 assert(oopDesc::is_oop(module), "module must be oop");
3910 module->address_field_put(_module_entry_offset, (address)module_entry);
3911 }
3912
3913 Handle reflect_ConstantPool::create(TRAPS) {
3914 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3915 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3916 // Ensure it is initialized
3917 k->initialize(CHECK_NH);
3918 return k->allocate_instance_handle(THREAD);
3919 }
3920
3921
3922 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3923 oop mirror = value->pool_holder()->java_mirror();
3924 // Save the mirror to get back the constant pool.
3925 reflect->obj_field_put(_oop_offset, mirror);
3926 }
3927
3928 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3929
3930 oop mirror = reflect->obj_field(_oop_offset);
3931 Klass* k = java_lang_Class::as_Klass(mirror);
3932 assert(k->is_instance_klass(), "Must be");
3933
3934 // Get the constant pool back from the klass. Since class redefinition
3935 // merges the new constant pool into the old, this is essentially the
3936 // same constant pool as the original. If constant pool merging is
3937 // no longer done in the future, this will have to change to save
3938 // the original.
3939 return InstanceKlass::cast(k)->constants();
3940 }
3941
3942
3943 // Support for java_lang_ref_Reference
3944
3945 bool java_lang_ref_Reference::_offsets_initialized;
3946
3947 int java_lang_ref_Reference::_referent_offset;
3948 int java_lang_ref_Reference::_queue_offset;
3949 int java_lang_ref_Reference::_next_offset;
3950 int java_lang_ref_Reference::_discovered_offset;
3951
3952 #define REFERENCE_FIELDS_DO(macro) \
3953 macro(_referent_offset, k, "referent", object_signature, false); \
3954 macro(_queue_offset, k, "queue", referencequeue_signature, false); \
3955 macro(_next_offset, k, "next", reference_signature, false); \
3956 macro(_discovered_offset, k, "discovered", reference_signature, false);
3957
3958 void java_lang_ref_Reference::compute_offsets() {
3959 if (_offsets_initialized) {
3960 return;
3961 }
3962 _offsets_initialized = true;
3963 InstanceKlass* k = vmClasses::Reference_klass();
3964 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3965 }
3966
3967 #if INCLUDE_CDS
3968 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3969 f->do_bool(&_offsets_initialized);
3970 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3971 }
3972 #endif
3973
3974 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3975 assert(obj != nullptr, "sanity");
3976 if (offset != _referent_offset) {
3977 return false;
3978 }
3979
3980 Klass* k = obj->klass();
3981 if (!k->is_instance_klass()) {
3982 return false;
3983 }
3984
3985 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3986 bool is_reference = ik->reference_type() != REF_NONE;
3987 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
3988 return is_reference;
3989 }
3990
3991 int* java_lang_boxing_object::_offsets;
3992
3993 #define BOXING_FIELDS_DO(macro) \
3994 macro(java_lang_boxing_object::_offsets[T_BOOLEAN - T_BOOLEAN], vmClasses::Boolean_klass(), "value", bool_signature, false); \
3995 macro(java_lang_boxing_object::_offsets[T_CHAR - T_BOOLEAN], vmClasses::Character_klass(), "value", char_signature, false); \
3996 macro(java_lang_boxing_object::_offsets[T_FLOAT - T_BOOLEAN], vmClasses::Float_klass(), "value", float_signature, false); \
3997 macro(java_lang_boxing_object::_offsets[T_DOUBLE - T_BOOLEAN], vmClasses::Double_klass(), "value", double_signature, false); \
3998 macro(java_lang_boxing_object::_offsets[T_BYTE - T_BOOLEAN], vmClasses::Byte_klass(), "value", byte_signature, false); \
3999 macro(java_lang_boxing_object::_offsets[T_SHORT - T_BOOLEAN], vmClasses::Short_klass(), "value", short_signature, false); \
4000 macro(java_lang_boxing_object::_offsets[T_INT - T_BOOLEAN], vmClasses::Integer_klass(), "value", int_signature, false); \
4001 macro(java_lang_boxing_object::_offsets[T_LONG - T_BOOLEAN], vmClasses::Long_klass(), "value", long_signature, false);
4002
4003 void java_lang_boxing_object::compute_offsets() {
4004 assert(T_LONG - T_BOOLEAN == 7, "Sanity check");
4005 java_lang_boxing_object::_offsets = NEW_C_HEAP_ARRAY(int, 8, mtInternal);
4006 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4007 }
4008
4009 #if INCLUDE_CDS
4010 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
4011 if (f->reading()) {
4012 assert(T_LONG - T_BOOLEAN == 7, "Sanity check");
4013 java_lang_boxing_object::_offsets = NEW_C_HEAP_ARRAY(int, 8, mtInternal);
4014 }
4015 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4016 }
4017 #endif
4018
4019 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
4020 Klass* k = vmClasses::box_klass(type);
4021 if (k == nullptr) return nullptr;
4022 InstanceKlass* ik = InstanceKlass::cast(k);
4023 if (!ik->is_initialized()) {
4024 ik->initialize(CHECK_NULL);
4025 }
4026 return ik->allocate_instance(THREAD);
4027 }
4028
4029
4030 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
4031 oop box = initialize_and_allocate(type, CHECK_NULL);
4032 if (box == nullptr) return nullptr;
4033 switch (type) {
4034 case T_BOOLEAN:
4035 box->bool_field_put(value_offset(type), value->z);
4036 break;
4037 case T_CHAR:
4038 box->char_field_put(value_offset(type), value->c);
4039 break;
4040 case T_FLOAT:
4041 box->float_field_put(value_offset(type), value->f);
4042 break;
4043 case T_DOUBLE:
4044 box->double_field_put(value_offset(type), value->d);
4045 break;
4046 case T_BYTE:
4047 box->byte_field_put(value_offset(type), value->b);
4048 break;
4049 case T_SHORT:
4050 box->short_field_put(value_offset(type), value->s);
4051 break;
4052 case T_INT:
4053 box->int_field_put(value_offset(type), value->i);
4054 break;
4055 case T_LONG:
4056 box->long_field_put(value_offset(type), value->j);
4057 break;
4058 default:
4059 return nullptr;
4060 }
4061 return box;
4062 }
4063
4064
4065 BasicType java_lang_boxing_object::basic_type(oop box) {
4066 if (box == nullptr) return T_ILLEGAL;
4067 BasicType type = vmClasses::box_klass_type(box->klass());
4068 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
4069 return T_ILLEGAL;
4070 return type;
4071 }
4072
4073
4074 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
4075 BasicType type = vmClasses::box_klass_type(box->klass());
4076 switch (type) {
4077 case T_BOOLEAN:
4078 value->z = box->bool_field(value_offset(type));
4079 break;
4080 case T_CHAR:
4081 value->c = box->char_field(value_offset(type));
4082 break;
4083 case T_FLOAT:
4084 value->f = box->float_field(value_offset(type));
4085 break;
4086 case T_DOUBLE:
4087 value->d = box->double_field(value_offset(type));
4088 break;
4089 case T_BYTE:
4090 value->b = box->byte_field(value_offset(type));
4091 break;
4092 case T_SHORT:
4093 value->s = box->short_field(value_offset(type));
4094 break;
4095 case T_INT:
4096 value->i = box->int_field(value_offset(type));
4097 break;
4098 case T_LONG:
4099 value->j = box->long_field(value_offset(type));
4100 break;
4101 default:
4102 return T_ILLEGAL;
4103 } // end switch
4104 return type;
4105 }
4106
4107
4108 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
4109 BasicType type = vmClasses::box_klass_type(box->klass());
4110 switch (type) {
4111 case T_BOOLEAN:
4112 box->bool_field_put(value_offset(type), value->z);
4113 break;
4114 case T_CHAR:
4115 box->char_field_put(value_offset(type), value->c);
4116 break;
4117 case T_FLOAT:
4118 box->float_field_put(value_offset(type), value->f);
4119 break;
4120 case T_DOUBLE:
4121 box->double_field_put(value_offset(type), value->d);
4122 break;
4123 case T_BYTE:
4124 box->byte_field_put(value_offset(type), value->b);
4125 break;
4126 case T_SHORT:
4127 box->short_field_put(value_offset(type), value->s);
4128 break;
4129 case T_INT:
4130 box->int_field_put(value_offset(type), value->i);
4131 break;
4132 case T_LONG:
4133 box->long_field_put(value_offset(type), value->j);
4134 break;
4135 default:
4136 return T_ILLEGAL;
4137 } // end switch
4138 return type;
4139 }
4140
4141
4142 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
4143 switch (type) {
4144 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
4145 case T_CHAR: st->print("%d", value->c); break;
4146 case T_BYTE: st->print("%d", value->b); break;
4147 case T_SHORT: st->print("%d", value->s); break;
4148 case T_INT: st->print("%d", value->i); break;
4149 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
4150 case T_FLOAT: st->print("%f", value->f); break;
4151 case T_DOUBLE: st->print("%lf", value->d); break;
4152 default: st->print("type %d?", type); break;
4153 }
4154 }
4155
4156
4157 // Support for java_lang_ref_SoftReference
4158 //
4159
4160 int java_lang_ref_SoftReference::_timestamp_offset;
4161 int java_lang_ref_SoftReference::_static_clock_offset;
4162
4163 #define SOFTREFERENCE_FIELDS_DO(macro) \
4164 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
4165 macro(_static_clock_offset, k, "clock", long_signature, true)
4166
4167 void java_lang_ref_SoftReference::compute_offsets() {
4168 InstanceKlass* k = vmClasses::SoftReference_klass();
4169 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4170 }
4171
4172 #if INCLUDE_CDS
4173 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
4174 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4175 }
4176 #endif
4177
4178 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
4179 return ref->long_field(_timestamp_offset);
4180 }
4181
4182 jlong java_lang_ref_SoftReference::clock() {
4183 InstanceKlass* ik = vmClasses::SoftReference_klass();
4184 oop base = ik->static_field_base_raw();
4185 return base->long_field(_static_clock_offset);
4186 }
4187
4188 void java_lang_ref_SoftReference::set_clock(jlong value) {
4189 InstanceKlass* ik = vmClasses::SoftReference_klass();
4190 oop base = ik->static_field_base_raw();
4191 base->long_field_put(_static_clock_offset, value);
4192 }
4193
4194 // Support for java_lang_invoke_DirectMethodHandle
4195
4196 int java_lang_invoke_DirectMethodHandle::_member_offset;
4197
4198 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
4199 oop member_name = nullptr;
4200 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
4201 "a DirectMethodHandle oop is expected");
4202 return dmh->obj_field(_member_offset);
4203 }
4204
4205 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
4206 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
4207
4208 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
4209 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
4210 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4211 }
4212
4213 #if INCLUDE_CDS
4214 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
4215 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4216 }
4217 #endif
4218
4219 // Support for java_lang_invoke_MethodHandle
4220
4221 int java_lang_invoke_MethodHandle::_type_offset;
4222 int java_lang_invoke_MethodHandle::_form_offset;
4223
4224 int java_lang_invoke_MemberName::_clazz_offset;
4225 int java_lang_invoke_MemberName::_name_offset;
4226 int java_lang_invoke_MemberName::_type_offset;
4227 int java_lang_invoke_MemberName::_flags_offset;
4228 int java_lang_invoke_MemberName::_method_offset;
4229 int java_lang_invoke_MemberName::_vmindex_offset;
4230
4231 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
4232 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
4233
4234 int java_lang_invoke_LambdaForm::_vmentry_offset;
4235
4236 #define METHODHANDLE_FIELDS_DO(macro) \
4237 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4238 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
4239
4240 void java_lang_invoke_MethodHandle::compute_offsets() {
4241 InstanceKlass* k = vmClasses::MethodHandle_klass();
4242 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4243 }
4244
4245 #if INCLUDE_CDS
4246 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4247 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4248 }
4249 #endif
4250
4251 #define MEMBERNAME_FIELDS_DO(macro) \
4252 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4253 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4254 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
4255 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
4256 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
4257
4258 void java_lang_invoke_MemberName::compute_offsets() {
4259 InstanceKlass* k = vmClasses::MemberName_klass();
4260 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4261 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4262 }
4263
4264 #if INCLUDE_CDS
4265 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4266 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4267 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4268 }
4269 #endif
4270
4271 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4272 macro(_vmholder_offset, k, "vmholder", class_signature, false)
4273
4274 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4275 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4276 assert(k != nullptr, "jdk mismatch");
4277 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4278 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4279 }
4280
4281 #if INCLUDE_CDS
4282 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4283 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4284 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4285 }
4286 #endif
4287
4288 #define LAMBDAFORM_FIELDS_DO(macro) \
4289 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4290
4291 void java_lang_invoke_LambdaForm::compute_offsets() {
4292 InstanceKlass* k = vmClasses::LambdaForm_klass();
4293 assert (k != nullptr, "jdk mismatch");
4294 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4295 }
4296
4297 #if INCLUDE_CDS
4298 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4299 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4300 }
4301 #endif
4302
4303 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4304 return obj != nullptr && is_subclass(obj->klass());
4305 }
4306
4307 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4308 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4309
4310 #define NEP_FIELDS_DO(macro) \
4311 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
4312 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4313
4314 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4315 return obj != nullptr && is_subclass(obj->klass());
4316 }
4317
4318 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4319 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4320 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4321 }
4322
4323 #if INCLUDE_CDS
4324 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4325 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4326 }
4327 #endif
4328
4329 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4330 return entry->obj_field(_method_type_offset);
4331 }
4332
4333 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4334 return entry->long_field(_downcall_stub_address_offset);
4335 }
4336
4337 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4338 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4339 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4340 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4341 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4342 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4343 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4344
4345 #define ABIDescriptor_FIELDS_DO(macro) \
4346 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4347 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4348 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4349 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4350 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4351 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4352 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4353
4354 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4355 return obj != nullptr && is_subclass(obj->klass());
4356 }
4357
4358 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4359 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4360 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4361 }
4362
4363 #if INCLUDE_CDS
4364 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4365 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4366 }
4367 #endif
4368
4369 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4370 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4371 }
4372
4373 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4374 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4375 }
4376
4377 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4378 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4379 }
4380
4381 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4382 return entry->int_field(_stackAlignment_offset);
4383 }
4384
4385 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4386 return entry->int_field(_shadowSpace_offset);
4387 }
4388
4389 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4390 return entry->obj_field(_scratch1_offset);
4391 }
4392
4393 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4394 return entry->obj_field(_scratch2_offset);
4395 }
4396
4397 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4398 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4399 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4400 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4401
4402 #define VMStorage_FIELDS_DO(macro) \
4403 macro(_type_offset, k, "type", byte_signature, false); \
4404 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4405 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4406 macro(_debugName_offset, k, "debugName", string_signature, false); \
4407
4408 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4409 return obj != nullptr && is_subclass(obj->klass());
4410 }
4411
4412 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4413 InstanceKlass* k = vmClasses::VMStorage_klass();
4414 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4415 }
4416
4417 #if INCLUDE_CDS
4418 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4419 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4420 }
4421 #endif
4422
4423 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4424 return entry->byte_field(_type_offset);
4425 }
4426
4427 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4428 return entry->int_field(_indexOrOffset_offset);
4429 }
4430
4431 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4432 return entry->short_field(_segmentMaskOrSize_offset);
4433 }
4434
4435 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4436 return entry->obj_field(_debugName_offset);
4437 }
4438
4439 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4440 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4441
4442 #define CallConv_FIELDS_DO(macro) \
4443 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4444 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4445
4446 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4447 return obj != nullptr && is_subclass(obj->klass());
4448 }
4449
4450 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4451 InstanceKlass* k = vmClasses::CallConv_klass();
4452 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4453 }
4454
4455 #if INCLUDE_CDS
4456 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4457 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4458 }
4459 #endif
4460
4461 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4462 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4463 }
4464
4465 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4466 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4467 }
4468
4469 oop java_lang_invoke_MethodHandle::type(oop mh) {
4470 return mh->obj_field(_type_offset);
4471 }
4472
4473 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4474 mh->obj_field_put(_type_offset, mtype);
4475 }
4476
4477 oop java_lang_invoke_MethodHandle::form(oop mh) {
4478 assert(_form_offset != 0, "");
4479 return mh->obj_field(_form_offset);
4480 }
4481
4482 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4483 assert(_form_offset != 0, "");
4484 mh->obj_field_put(_form_offset, lform);
4485 }
4486
4487 /// MemberName accessors
4488
4489 oop java_lang_invoke_MemberName::clazz(oop mname) {
4490 assert(is_instance(mname), "wrong type");
4491 return mname->obj_field(_clazz_offset);
4492 }
4493
4494 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4495 assert(is_instance(mname), "wrong type");
4496 mname->obj_field_put(_clazz_offset, clazz);
4497 }
4498
4499 oop java_lang_invoke_MemberName::name(oop mname) {
4500 assert(is_instance(mname), "wrong type");
4501 return mname->obj_field(_name_offset);
4502 }
4503
4504 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4505 assert(is_instance(mname), "wrong type");
4506 mname->obj_field_put(_name_offset, name);
4507 }
4508
4509 oop java_lang_invoke_MemberName::type(oop mname) {
4510 assert(is_instance(mname), "wrong type");
4511 return mname->obj_field(_type_offset);
4512 }
4513
4514 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4515 assert(is_instance(mname), "wrong type");
4516 mname->obj_field_put(_type_offset, type);
4517 }
4518
4519 int java_lang_invoke_MemberName::flags(oop mname) {
4520 assert(is_instance(mname), "wrong type");
4521 return mname->int_field(_flags_offset);
4522 }
4523
4524 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4525 assert(is_instance(mname), "wrong type");
4526 mname->int_field_put(_flags_offset, flags);
4527 }
4528
4529 // Return vmtarget from ResolvedMethodName method field through indirection
4530 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4531 assert(is_instance(mname), "wrong type");
4532 oop method = mname->obj_field(_method_offset);
4533 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4534 }
4535
4536 bool java_lang_invoke_MemberName::is_method(oop mname) {
4537 assert(is_instance(mname), "must be MemberName");
4538 return (flags(mname) & (MN_IS_METHOD | MN_IS_OBJECT_CONSTRUCTOR)) > 0;
4539 }
4540
4541 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4542 assert(is_instance(mname), "wrong type");
4543 mname->obj_field_put(_method_offset, resolved_method);
4544 }
4545
4546 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4547 assert(is_instance(mname), "wrong type");
4548 return (intptr_t) mname->address_field(_vmindex_offset);
4549 }
4550
4551 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4552 assert(is_instance(mname), "wrong type");
4553 mname->address_field_put(_vmindex_offset, (address) index);
4554 }
4555
4556
4557 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4558 assert(is_instance(resolved_method), "wrong type");
4559 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4560 assert(m->is_method(), "must be");
4561 return m;
4562 }
4563
4564 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4565 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4566 assert(is_instance(resolved_method), "wrong type");
4567 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4568 }
4569
4570 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4571 assert(is_instance(resolved_method), "wrong type");
4572 resolved_method->obj_field_put(_vmholder_offset, holder);
4573 }
4574
4575 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4576 const Method* method = m();
4577
4578 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4579 oop resolved_method = ResolvedMethodTable::find_method(method);
4580 if (resolved_method != nullptr) {
4581 return resolved_method;
4582 }
4583
4584 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4585 if (!k->is_initialized()) {
4586 k->initialize(CHECK_NULL);
4587 }
4588
4589 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4590
4591 NoSafepointVerifier nsv;
4592
4593 if (method->is_old()) {
4594 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4595 method->get_new_method();
4596 }
4597
4598 InstanceKlass* holder = method->method_holder();
4599
4600 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4601 // Add a reference to the loader (actually mirror because hidden classes may not have
4602 // distinct loaders) to ensure the metadata is kept alive.
4603 // This mirror may be different than the one in clazz field.
4604 set_vmholder(new_resolved_method, holder->java_mirror());
4605
4606 // Set flag in class to indicate this InstanceKlass has entries in the table
4607 // to avoid walking table during redefinition if none of the redefined classes
4608 // have any membernames in the table.
4609 holder->set_has_resolved_methods();
4610
4611 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4612 }
4613
4614 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4615 assert(is_instance(lform), "wrong type");
4616 return lform->obj_field(_vmentry_offset);
4617 }
4618
4619
4620 // Support for java_lang_invoke_MethodType
4621
4622 int java_lang_invoke_MethodType::_rtype_offset;
4623 int java_lang_invoke_MethodType::_ptypes_offset;
4624
4625 #define METHODTYPE_FIELDS_DO(macro) \
4626 macro(_rtype_offset, k, "rtype", class_signature, false); \
4627 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4628
4629 void java_lang_invoke_MethodType::compute_offsets() {
4630 InstanceKlass* k = vmClasses::MethodType_klass();
4631 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4632 }
4633
4634 #if INCLUDE_CDS
4635 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4636 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4637 }
4638 #endif
4639
4640 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4641 st->print("(");
4642 objArrayOop pts = ptypes(mt);
4643 if (pts != nullptr) {
4644 for (int i = 0, limit = pts->length(); i < limit; i++) {
4645 java_lang_Class::print_signature(pts->obj_at(i), st);
4646 }
4647 } else {
4648 st->print("null");
4649 }
4650 st->print(")");
4651 oop rt = rtype(mt);
4652 if (rt != nullptr) {
4653 java_lang_Class::print_signature(rt, st);
4654 } else {
4655 st->print("null");
4656 }
4657 }
4658
4659 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4660 ResourceMark rm;
4661 stringStream buffer(128);
4662 print_signature(mt, &buffer);
4663 const char* sigstr = buffer.base();
4664 int siglen = (int) buffer.size();
4665 Symbol *name;
4666 if (!intern_if_not_found) {
4667 name = SymbolTable::probe(sigstr, siglen);
4668 } else {
4669 name = SymbolTable::new_symbol(sigstr, siglen);
4670 }
4671 return name;
4672 }
4673
4674 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4675 if (mt1 == mt2)
4676 return true;
4677 if (rtype(mt1) != rtype(mt2))
4678 return false;
4679 if (ptype_count(mt1) != ptype_count(mt2))
4680 return false;
4681 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4682 if (ptype(mt1, i) != ptype(mt2, i))
4683 return false;
4684 }
4685 return true;
4686 }
4687
4688 oop java_lang_invoke_MethodType::rtype(oop mt) {
4689 assert(is_instance(mt), "must be a MethodType");
4690 return mt->obj_field(_rtype_offset);
4691 }
4692
4693 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4694 assert(is_instance(mt), "must be a MethodType");
4695 return (objArrayOop) mt->obj_field(_ptypes_offset);
4696 }
4697
4698 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4699 return ptypes(mt)->obj_at(idx);
4700 }
4701
4702 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4703 return ptypes(mt)->length();
4704 }
4705
4706 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4707 objArrayOop pts = ptypes(mt);
4708 int count = pts->length();
4709 int slots = 0;
4710 for (int i = 0; i < count; i++) {
4711 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4712 slots += type2size[bt];
4713 }
4714 return slots;
4715 }
4716
4717 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4718 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4719 return type2size[bt];
4720 }
4721
4722
4723 // Support for java_lang_invoke_CallSite
4724
4725 int java_lang_invoke_CallSite::_target_offset;
4726 int java_lang_invoke_CallSite::_vmdependencies_offset;
4727 int java_lang_invoke_CallSite::_last_cleanup_offset;
4728
4729 #define CALLSITE_FIELDS_DO(macro) \
4730 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
4731
4732 void java_lang_invoke_CallSite::compute_offsets() {
4733 InstanceKlass* k = vmClasses::CallSite_klass();
4734 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4735 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4736 }
4737
4738 #if INCLUDE_CDS
4739 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4740 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4741 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4742 }
4743 #endif
4744
4745 DependencyContext java_lang_invoke_CallSite::vmdependencies(oop call_site) {
4746 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4747 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4748 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4749 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4750 return dep_ctx;
4751 }
4752
4753 // Support for java_lang_invoke_ConstantCallSite
4754
4755 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4756
4757 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4758 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4759
4760 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4761 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4762 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4763 }
4764
4765 #if INCLUDE_CDS
4766 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4767 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4768 }
4769 #endif
4770
4771 // Support for java_lang_ClassLoader
4772
4773 int java_lang_ClassLoader::_loader_data_offset;
4774 int java_lang_ClassLoader::_parallelCapable_offset;
4775 int java_lang_ClassLoader::_name_offset;
4776 int java_lang_ClassLoader::_nameAndId_offset;
4777 int java_lang_ClassLoader::_unnamedModule_offset;
4778 int java_lang_ClassLoader::_parent_offset;
4779
4780 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4781 assert(loader != nullptr, "loader must not be null");
4782 assert(oopDesc::is_oop(loader), "loader must be oop");
4783 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4784 }
4785
4786 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4787 assert(loader != nullptr, "loader must not be null");
4788 assert(oopDesc::is_oop(loader), "loader must be oop");
4789 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4790 }
4791
4792 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4793 assert(loader != nullptr, "loader must not be null");
4794 assert(oopDesc::is_oop(loader), "loader must be oop");
4795 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4796 }
4797
4798 #define CLASSLOADER_FIELDS_DO(macro) \
4799 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4800 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4801 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
4802 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4803 macro(_parent_offset, k1, "parent", classloader_signature, false)
4804
4805 void java_lang_ClassLoader::compute_offsets() {
4806 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4807 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4808
4809 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4810 }
4811
4812 #if INCLUDE_CDS
4813 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4814 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4815 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4816 }
4817 #endif
4818
4819 oop java_lang_ClassLoader::parent(oop loader) {
4820 assert(is_instance(loader), "loader must be oop");
4821 return loader->obj_field(_parent_offset);
4822 }
4823
4824 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4825 assert(is_instance(loader), "loader must be oop");
4826 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4827 }
4828
4829 // Returns the name field of this class loader. If the name field has not
4830 // been set, null will be returned.
4831 oop java_lang_ClassLoader::name(oop loader) {
4832 assert(is_instance(loader), "loader must be oop");
4833 return loader->obj_field(_name_offset);
4834 }
4835
4836 // Returns the nameAndId field of this class loader. The format is
4837 // as follows:
4838 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4839 // If the defining loader has no name then <qualified-class-name> @<id>
4840 // If built-in loader, then omit '@<id>' as there is only one instance.
4841 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4842 oop java_lang_ClassLoader::nameAndId(oop loader) {
4843 assert(is_instance(loader), "loader must be oop");
4844 return loader->obj_field(_nameAndId_offset);
4845 }
4846
4847 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4848 assert(is_instance(loader), "loader must be oop");
4849 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4850 oop acl = loader;
4851 DEBUG_ONLY(jint loop_count = 0);
4852 // This loop taken verbatim from ClassLoader.java:
4853 do {
4854 acl = parent(acl);
4855 if (cl == acl) {
4856 return true;
4857 }
4858 assert(++loop_count > 0, "loop_count overflow");
4859 } while (acl != nullptr);
4860 return false;
4861 }
4862
4863 bool java_lang_ClassLoader::is_instance(oop obj) {
4864 return obj != nullptr && is_subclass(obj->klass());
4865 }
4866
4867
4868 // For class loader classes, parallelCapable defined
4869 // based on non-null field
4870 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4871 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4872 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4873 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4874 }
4875
4876 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4877 oop cl = SystemDictionary::java_system_loader();
4878 while(cl != nullptr) {
4879 if (cl == loader) return true;
4880 cl = parent(cl);
4881 }
4882 return false;
4883 }
4884
4885 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4886 assert(is_instance(loader), "loader must be oop");
4887 return loader->obj_field(_unnamedModule_offset);
4888 }
4889
4890 // Support for java_lang_System
4891 //
4892
4893 int java_lang_System::_static_in_offset;
4894 int java_lang_System::_static_out_offset;
4895 int java_lang_System::_static_err_offset;
4896
4897 #define SYSTEM_FIELDS_DO(macro) \
4898 macro(_static_in_offset, k, "in", input_stream_signature, true); \
4899 macro(_static_out_offset, k, "out", print_stream_signature, true); \
4900 macro(_static_err_offset, k, "err", print_stream_signature, true);
4901
4902 void java_lang_System::compute_offsets() {
4903 InstanceKlass* k = vmClasses::System_klass();
4904 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4905 }
4906
4907 #if INCLUDE_CDS
4908 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4909 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4910 }
4911 #endif
4912
4913 // Support for jdk_internal_misc_UnsafeConstants
4914 //
4915 class UnsafeConstantsFixup : public FieldClosure {
4916 private:
4917 int _address_size;
4918 int _page_size;
4919 bool _big_endian;
4920 bool _use_unaligned_access;
4921 int _data_cache_line_flush_size;
4922 public:
4923 UnsafeConstantsFixup() {
4924 // round up values for all static final fields
4925 _address_size = sizeof(void*);
4926 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4927 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4928 _use_unaligned_access = UseUnalignedAccesses;
4929 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4930 }
4931
4932 void do_field(fieldDescriptor* fd) {
4933 oop mirror = fd->field_holder()->java_mirror();
4934 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4935 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4936 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4937 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4938 if (fd->name() == vmSymbols::address_size_name()) {
4939 mirror->int_field_put(fd->offset(), _address_size);
4940 } else if (fd->name() == vmSymbols::page_size_name()) {
4941 mirror->int_field_put(fd->offset(), _page_size);
4942 } else if (fd->name() == vmSymbols::big_endian_name()) {
4943 mirror->bool_field_put(fd->offset(), _big_endian);
4944 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4945 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4946 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4947 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4948 } else {
4949 assert(false, "unexpected UnsafeConstants field");
4950 }
4951 }
4952 };
4953
4954 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4955 UnsafeConstantsFixup fixup;
4956 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4957 }
4958
4959
4960 // java_lang_StackTraceElement
4961
4962 int java_lang_StackTraceElement::_methodName_offset;
4963 int java_lang_StackTraceElement::_fileName_offset;
4964 int java_lang_StackTraceElement::_lineNumber_offset;
4965 int java_lang_StackTraceElement::_moduleName_offset;
4966 int java_lang_StackTraceElement::_moduleVersion_offset;
4967 int java_lang_StackTraceElement::_classLoaderName_offset;
4968 int java_lang_StackTraceElement::_declaringClass_offset;
4969 int java_lang_StackTraceElement::_declaringClassObject_offset;
4970
4971 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4972 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4973 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4974 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
4975 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4976 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
4977 macro(_methodName_offset, k, "methodName", string_signature, false); \
4978 macro(_fileName_offset, k, "fileName", string_signature, false); \
4979 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
4980
4981 // Support for java_lang_StackTraceElement
4982 void java_lang_StackTraceElement::compute_offsets() {
4983 InstanceKlass* k = vmClasses::StackTraceElement_klass();
4984 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4985 }
4986
4987 #if INCLUDE_CDS
4988 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4989 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4990 }
4991 #endif
4992
4993 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4994 element->obj_field_put(_fileName_offset, value);
4995 }
4996
4997 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4998 element->obj_field_put(_declaringClass_offset, value);
4999 }
5000
5001 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
5002 element->obj_field_put(_methodName_offset, value);
5003 }
5004
5005 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
5006 element->int_field_put(_lineNumber_offset, value);
5007 }
5008
5009 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
5010 element->obj_field_put(_moduleName_offset, value);
5011 }
5012
5013 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
5014 element->obj_field_put(_moduleVersion_offset, value);
5015 }
5016
5017 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
5018 element->obj_field_put(_classLoaderName_offset, value);
5019 }
5020
5021 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
5022 element->obj_field_put(_declaringClassObject_offset, value);
5023 }
5024
5025
5026 // java_lang_AssertionStatusDirectives
5027
5028 int java_lang_AssertionStatusDirectives::_classes_offset;
5029 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
5030 int java_lang_AssertionStatusDirectives::_packages_offset;
5031 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
5032 int java_lang_AssertionStatusDirectives::_deflt_offset;
5033
5034 // Support for java Assertions - java_lang_AssertionStatusDirectives.
5035 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
5036 macro(_classes_offset, k, "classes", string_array_signature, false); \
5037 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
5038 macro(_packages_offset, k, "packages", string_array_signature, false); \
5039 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
5040 macro(_deflt_offset, k, "deflt", bool_signature, false)
5041
5042 void java_lang_AssertionStatusDirectives::compute_offsets() {
5043 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
5044 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5045 }
5046
5047 #if INCLUDE_CDS
5048 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
5049 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5050 }
5051 #endif
5052
5053 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
5054 o->obj_field_put(_classes_offset, val);
5055 }
5056
5057 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
5058 o->obj_field_put(_classEnabled_offset, val);
5059 }
5060
5061 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
5062 o->obj_field_put(_packages_offset, val);
5063 }
5064
5065 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
5066 o->obj_field_put(_packageEnabled_offset, val);
5067 }
5068
5069 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
5070 o->bool_field_put(_deflt_offset, val);
5071 }
5072
5073 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
5074
5075 #define AOS_FIELDS_DO(macro) \
5076 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
5077
5078 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
5079 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
5080 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5081 }
5082
5083 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
5084 assert(_owner_offset != 0, "Must be initialized");
5085 return obj->obj_field(_owner_offset);
5086 }
5087
5088 #if INCLUDE_CDS
5089 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
5090 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5091 }
5092 #endif
5093
5094 int vector_VectorPayload::_payload_offset;
5095
5096 #define VECTORPAYLOAD_FIELDS_DO(macro) \
5097 macro(_payload_offset, k, "payload", object_signature, false)
5098
5099 void vector_VectorPayload::compute_offsets() {
5100 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
5101 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5102 }
5103
5104 #if INCLUDE_CDS
5105 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
5106 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5107 }
5108 #endif
5109
5110 void vector_VectorPayload::set_payload(oop o, oop val) {
5111 o->obj_field_put(_payload_offset, val);
5112 }
5113
5114 bool vector_VectorPayload::is_instance(oop obj) {
5115 return obj != nullptr && is_subclass(obj->klass());
5116 }
5117
5118 int java_lang_Integer_IntegerCache::_static_cache_offset;
5119 int java_lang_Long_LongCache::_static_cache_offset;
5120 int java_lang_Character_CharacterCache::_static_cache_offset;
5121 int java_lang_Short_ShortCache::_static_cache_offset;
5122 int java_lang_Byte_ByteCache::_static_cache_offset;
5123
5124 #define INTEGER_CACHE_FIELDS_DO(macro) \
5125 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5126
5127 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5128 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5129 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5130 }
5131
5132 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5133 oop base = ik->static_field_base_raw();
5134 return objArrayOop(base->obj_field(_static_cache_offset));
5135 }
5136
5137 Symbol* java_lang_Integer_IntegerCache::symbol() {
5138 return vmSymbols::java_lang_Integer_IntegerCache();
5139 }
5140
5141 #if INCLUDE_CDS
5142 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5143 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5144 }
5145 #endif
5146 #undef INTEGER_CACHE_FIELDS_DO
5147
5148 jint java_lang_Integer::value(oop obj) {
5149 jvalue v;
5150 java_lang_boxing_object::get_value(obj, &v);
5151 return v.i;
5152 }
5153
5154 #define LONG_CACHE_FIELDS_DO(macro) \
5155 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5156
5157 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5158 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5159 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5160 }
5161
5162 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5163 oop base = ik->static_field_base_raw();
5164 return objArrayOop(base->obj_field(_static_cache_offset));
5165 }
5166
5167 Symbol* java_lang_Long_LongCache::symbol() {
5168 return vmSymbols::java_lang_Long_LongCache();
5169 }
5170
5171 #if INCLUDE_CDS
5172 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5173 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5174 }
5175 #endif
5176 #undef LONG_CACHE_FIELDS_DO
5177
5178 jlong java_lang_Long::value(oop obj) {
5179 jvalue v;
5180 java_lang_boxing_object::get_value(obj, &v);
5181 return v.j;
5182 }
5183
5184 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5185 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5186
5187 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5188 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5189 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5190 }
5191
5192 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5193 oop base = ik->static_field_base_raw();
5194 return objArrayOop(base->obj_field(_static_cache_offset));
5195 }
5196
5197 Symbol* java_lang_Character_CharacterCache::symbol() {
5198 return vmSymbols::java_lang_Character_CharacterCache();
5199 }
5200
5201 #if INCLUDE_CDS
5202 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5203 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5204 }
5205 #endif
5206 #undef CHARACTER_CACHE_FIELDS_DO
5207
5208 jchar java_lang_Character::value(oop obj) {
5209 jvalue v;
5210 java_lang_boxing_object::get_value(obj, &v);
5211 return v.c;
5212 }
5213
5214 #define SHORT_CACHE_FIELDS_DO(macro) \
5215 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5216
5217 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5218 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5219 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5220 }
5221
5222 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5223 oop base = ik->static_field_base_raw();
5224 return objArrayOop(base->obj_field(_static_cache_offset));
5225 }
5226
5227 Symbol* java_lang_Short_ShortCache::symbol() {
5228 return vmSymbols::java_lang_Short_ShortCache();
5229 }
5230
5231 #if INCLUDE_CDS
5232 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5233 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5234 }
5235 #endif
5236 #undef SHORT_CACHE_FIELDS_DO
5237
5238 jshort java_lang_Short::value(oop obj) {
5239 jvalue v;
5240 java_lang_boxing_object::get_value(obj, &v);
5241 return v.s;
5242 }
5243
5244 #define BYTE_CACHE_FIELDS_DO(macro) \
5245 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5246
5247 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5248 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5249 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5250 }
5251
5252 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5253 oop base = ik->static_field_base_raw();
5254 return objArrayOop(base->obj_field(_static_cache_offset));
5255 }
5256
5257 Symbol* java_lang_Byte_ByteCache::symbol() {
5258 return vmSymbols::java_lang_Byte_ByteCache();
5259 }
5260
5261 #if INCLUDE_CDS
5262 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5263 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5264 }
5265 #endif
5266 #undef BYTE_CACHE_FIELDS_DO
5267
5268 jbyte java_lang_Byte::value(oop obj) {
5269 jvalue v;
5270 java_lang_boxing_object::get_value(obj, &v);
5271 return v.b;
5272 }
5273
5274 int java_lang_Boolean::_static_TRUE_offset;
5275 int java_lang_Boolean::_static_FALSE_offset;
5276
5277 #define BOOLEAN_FIELDS_DO(macro) \
5278 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5279 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5280
5281
5282 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5283 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5284 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5285 }
5286
5287 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5288 oop base = ik->static_field_base_raw();
5289 return base->obj_field(_static_TRUE_offset);
5290 }
5291
5292 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5293 oop base = ik->static_field_base_raw();
5294 return base->obj_field(_static_FALSE_offset);
5295 }
5296
5297 Symbol* java_lang_Boolean::symbol() {
5298 return vmSymbols::java_lang_Boolean();
5299 }
5300
5301 #if INCLUDE_CDS
5302 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5303 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5304 }
5305 #endif
5306 #undef BOOLEAN_CACHE_FIELDS_DO
5307
5308 jboolean java_lang_Boolean::value(oop obj) {
5309 jvalue v;
5310 java_lang_boxing_object::get_value(obj, &v);
5311 return v.z;
5312 }
5313
5314 // java_lang_reflect_RecordComponent
5315
5316 int java_lang_reflect_RecordComponent::_clazz_offset;
5317 int java_lang_reflect_RecordComponent::_name_offset;
5318 int java_lang_reflect_RecordComponent::_type_offset;
5319 int java_lang_reflect_RecordComponent::_accessor_offset;
5320 int java_lang_reflect_RecordComponent::_signature_offset;
5321 int java_lang_reflect_RecordComponent::_annotations_offset;
5322 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5323
5324 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5325 macro(_clazz_offset, k, "clazz", class_signature, false); \
5326 macro(_name_offset, k, "name", string_signature, false); \
5327 macro(_type_offset, k, "type", class_signature, false); \
5328 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5329 macro(_signature_offset, k, "signature", string_signature, false); \
5330 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5331 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5332
5333 // Support for java_lang_reflect_RecordComponent
5334 void java_lang_reflect_RecordComponent::compute_offsets() {
5335 InstanceKlass* k = vmClasses::RecordComponent_klass();
5336 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5337 }
5338
5339 #if INCLUDE_CDS
5340 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5341 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5342 }
5343 #endif
5344
5345 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5346 element->obj_field_put(_clazz_offset, value);
5347 }
5348
5349 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5350 element->obj_field_put(_name_offset, value);
5351 }
5352
5353 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5354 element->obj_field_put(_type_offset, value);
5355 }
5356
5357 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5358 element->obj_field_put(_accessor_offset, value);
5359 }
5360
5361 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5362 element->obj_field_put(_signature_offset, value);
5363 }
5364
5365 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5366 element->obj_field_put(_annotations_offset, value);
5367 }
5368
5369 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5370 element->obj_field_put(_typeAnnotations_offset, value);
5371 }
5372
5373 // java_lang_InternalError
5374 int java_lang_InternalError::_during_unsafe_access_offset;
5375
5376 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5377 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5378 }
5379
5380 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5381 return internal_error->bool_field(_during_unsafe_access_offset);
5382 }
5383
5384 void java_lang_InternalError::compute_offsets() {
5385 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5386 }
5387
5388 #if INCLUDE_CDS
5389 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5390 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5391 }
5392 #endif
5393
5394 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5395 f(java_lang_Class) \
5396 f(java_lang_String) \
5397 f(java_lang_ref_Reference) \
5398 //end
5399
5400 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5401 f(java_lang_System) \
5402 f(java_lang_ClassLoader) \
5403 f(java_lang_Throwable) \
5404 f(java_lang_Thread) \
5405 f(java_lang_Thread_FieldHolder) \
5406 f(java_lang_Thread_Constants) \
5407 f(java_lang_ThreadGroup) \
5408 f(java_lang_VirtualThread) \
5409 f(java_lang_InternalError) \
5410 f(java_lang_AssertionStatusDirectives) \
5411 f(java_lang_ref_SoftReference) \
5412 f(java_lang_invoke_MethodHandle) \
5413 f(java_lang_invoke_DirectMethodHandle) \
5414 f(java_lang_invoke_MemberName) \
5415 f(java_lang_invoke_ResolvedMethodName) \
5416 f(java_lang_invoke_LambdaForm) \
5417 f(java_lang_invoke_MethodType) \
5418 f(java_lang_invoke_CallSite) \
5419 f(java_lang_invoke_ConstantCallSite) \
5420 f(java_lang_reflect_AccessibleObject) \
5421 f(java_lang_reflect_Method) \
5422 f(java_lang_reflect_Constructor) \
5423 f(java_lang_reflect_Field) \
5424 f(java_lang_reflect_RecordComponent) \
5425 f(reflect_ConstantPool) \
5426 f(java_lang_reflect_Parameter) \
5427 f(java_lang_Module) \
5428 f(java_lang_StackTraceElement) \
5429 f(java_lang_ClassFrameInfo) \
5430 f(java_lang_StackFrameInfo) \
5431 f(java_lang_LiveStackFrameInfo) \
5432 f(jdk_internal_vm_ContinuationScope) \
5433 f(jdk_internal_vm_Continuation) \
5434 f(jdk_internal_vm_StackChunk) \
5435 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5436 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5437 f(jdk_internal_foreign_abi_ABIDescriptor) \
5438 f(jdk_internal_foreign_abi_VMStorage) \
5439 f(jdk_internal_foreign_abi_CallConv) \
5440 f(jdk_internal_misc_UnsafeConstants) \
5441 f(java_lang_boxing_object) \
5442 f(vector_VectorPayload) \
5443 //end
5444
5445 #define BASIC_JAVA_CLASSES_DO(f) \
5446 BASIC_JAVA_CLASSES_DO_PART1(f) \
5447 BASIC_JAVA_CLASSES_DO_PART2(f)
5448
5449 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5450
5451 // Compute field offsets of all the classes in this file
5452 void JavaClasses::compute_offsets() {
5453 if (CDSConfig::is_using_archive()) {
5454 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5455 JvmtiExport::has_early_class_hook_env()),
5456 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5457 // None of the classes used by the rest of this function can be replaced by
5458 // JVMTI ClassFileLoadHook.
5459 // We are safe to use the archived offsets, which have already been restored
5460 // by JavaClasses::serialize_offsets, without computing the offsets again.
5461 return;
5462 }
5463
5464 // We have already called the compute_offsets() of the
5465 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5466 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5467 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5468 }
5469
5470 #if INCLUDE_CDS
5471 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5472
5473 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5474 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5475 }
5476 #endif
5477
5478 #if INCLUDE_CDS_JAVA_HEAP
5479 bool JavaClasses::is_supported_for_archiving(oop obj) {
5480 Klass* klass = obj->klass();
5481
5482 if (!CDSConfig::is_dumping_method_handles()) {
5483 // These are supported by CDS only when CDSConfig::is_dumping_method_handles() is enabled.
5484 if (klass == vmClasses::ResolvedMethodName_klass() ||
5485 klass == vmClasses::MemberName_klass()) {
5486 return false;
5487 }
5488 }
5489
5490 if (!AOTReferenceObjSupport::is_enabled() && klass->is_subclass_of(vmClasses::Reference_klass())) {
5491 return false;
5492 }
5493
5494 return true;
5495 }
5496 #endif
5497
5498 #ifndef PRODUCT
5499
5500 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5501
5502 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5503 const char* field_sig) {
5504 EXCEPTION_MARK;
5505 fieldDescriptor fd;
5506 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5507 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5508 InstanceKlass* ik = InstanceKlass::cast(k);
5509 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5510 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5511 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5512 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5513 return false;
5514 }
5515 if (fd.is_static()) {
5516 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5517 return false;
5518 }
5519 if (fd.offset() == deserialized_offset ) {
5520 return true;
5521 } else {
5522 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5523 klass_name, field_name, deserialized_offset, fd.offset());
5524 return false;
5525 }
5526 }
5527
5528 void JavaClasses::check_offsets() {
5529 bool valid = true;
5530
5531 #define CHECK_OFFSET(klass_name, type, field_sig) \
5532 valid &= check_offset(klass_name, java_lang_boxing_object::value_offset(type), "value", field_sig)
5533
5534 CHECK_OFFSET("java/lang/Boolean", T_BOOLEAN, "Z");
5535 CHECK_OFFSET("java/lang/Character", T_CHAR, "C");
5536 CHECK_OFFSET("java/lang/Float", T_FLOAT, "F");
5537 CHECK_OFFSET("java/lang/Double", T_DOUBLE, "D");
5538 CHECK_OFFSET("java/lang/Byte", T_BYTE, "B");
5539 CHECK_OFFSET("java/lang/Short", T_SHORT, "S");
5540 CHECK_OFFSET("java/lang/Integer", T_INT, "I");
5541 CHECK_OFFSET("java/lang/Long", T_LONG, "J");
5542
5543 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5544 }
5545
5546 #endif // PRODUCT
5547
5548 int InjectedField::compute_offset() {
5549 InstanceKlass* ik = InstanceKlass::cast(klass());
5550 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5551 if (!may_be_java && !fs.field_flags().is_injected()) {
5552 // Only look at injected fields
5553 continue;
5554 }
5555 if (fs.name() == name() && fs.signature() == signature()) {
5556 return fs.offset();
5557 }
5558 }
5559 ResourceMark rm;
5560 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)" : "");
5561 #ifndef PRODUCT
5562 ik->print();
5563 tty->print_cr("all fields:");
5564 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5565 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());
5566 }
5567 #endif //PRODUCT
5568 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5569 return -1;
5570 }
5571
5572 void javaClasses_init() {
5573 JavaClasses::compute_offsets();
5574 JavaClasses::check_offsets();
5575 FilteredFieldsMap::initialize(); // must be done after computing offsets.
5576 }