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