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