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