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