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 create_scratch_mirror(k, CHECK);
1148 }
1149 } else {
1150 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1151 fixup_mirror_list()->push(k);
1152 }
1153 }
1154
1155 #if INCLUDE_CDS_JAVA_HEAP
1156 // The "scratch mirror" stores the states of the mirror object that can be
1157 // decided at dump time (such as the initial values of the static fields, the
1158 // component mirror, etc). At runtime, more information is added to it by
1159 // java_lang_Class::restore_archived_mirror().
1160 //
1161 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1162 // produces the same result as /*runtime*/create_mirror().
1163 //
1164 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1165 // latter may contain dumptime-specific information that cannot be archived
1166 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1167 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1168 if (k->class_loader() != nullptr &&
1169 k->class_loader() != SystemDictionary::java_platform_loader() &&
1170 k->class_loader() != SystemDictionary::java_system_loader()) {
1171 // We only archive the mirrors of classes loaded by the built-in loaders
1172 return;
1173 }
1174
1175 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1176 Handle mirror;
1177 Handle comp_mirror;
1178 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1179
1180 if (comp_mirror() != nullptr) {
1181 release_set_array_klass(comp_mirror(), k);
1182 }
1183
1184 HeapShared::set_scratch_java_mirror(k, mirror());
1185 }
1186
1187 // Returns true if the mirror is updated, false if no archived mirror
1188 // data is present. After the archived mirror object is restored, the
1189 // shared klass' _has_raw_archived_mirror flag is cleared.
1190 bool java_lang_Class::restore_archived_mirror(Klass *k,
1191 Handle class_loader, Handle module,
1192 Handle protection_domain, TRAPS) {
1193 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1194 // see more details in vmClasses::resolve_all().
1195 if (!vmClasses::Class_klass_loaded()) {
1196 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1197 fixup_mirror_list()->push(k);
1198 return true;
1199 }
1200
1201 oop m = k->archived_java_mirror();
1202 assert(m != nullptr, "must have stored non-null archived mirror");
1203
1204 // Sanity: clear it now to prevent re-initialization if any of the following fails
1205 k->clear_archived_mirror_index();
1206
1207 // mirror is archived, restore
1208 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1209 assert(as_Klass(m) == k, "must be");
1210 Handle mirror(THREAD, m);
1211
1212 if (!k->is_array_klass()) {
1213 // - local static final fields with initial values were initialized at dump time
1214
1215 // create the init_lock
1216 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1217 set_init_lock(mirror(), r);
1218
1219 if (protection_domain.not_null()) {
1220 set_protection_domain(mirror(), protection_domain());
1221 }
1222 }
1223
1224 assert(class_loader() == k->class_loader(), "should be same");
1225 if (class_loader.not_null()) {
1226 set_class_loader(mirror(), class_loader());
1227 }
1228
1229 k->set_java_mirror(mirror);
1230
1231 set_mirror_module_field(THREAD, k, mirror, module);
1232
1233 if (log_is_enabled(Trace, cds, heap, mirror)) {
1234 ResourceMark rm(THREAD);
1235 log_trace(cds, heap, mirror)(
1236 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1237 }
1238
1239 return true;
1240 }
1241 #endif // INCLUDE_CDS_JAVA_HEAP
1242
1243 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1244 assert(_module_offset != 0, "must have been computed already");
1245 set_module(k->java_mirror(), module());
1246 }
1247
1248 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1249 assert(_oop_size_offset != 0, "must be set");
1250 assert(size > 0, "Oop size must be greater than zero, not %zu", size);
1251 assert(size <= INT_MAX, "Lossy conversion: %zu", size);
1252 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1253 }
1254
1255 int java_lang_Class::static_oop_field_count(oop java_class) {
1256 assert(_static_oop_field_count_offset != 0, "must be set");
1257 return java_class->int_field(_static_oop_field_count_offset);
1258 }
1259
1260 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1261 assert(_static_oop_field_count_offset != 0, "must be set");
1262 java_class->int_field_put(_static_oop_field_count_offset, size);
1263 }
1264
1265 oop java_lang_Class::protection_domain(oop java_class) {
1266 assert(_protection_domain_offset != 0, "must be set");
1267 return java_class->obj_field(_protection_domain_offset);
1268 }
1269 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1270 assert(_protection_domain_offset != 0, "must be set");
1271 java_class->obj_field_put(_protection_domain_offset, pd);
1272 }
1273
1274 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1275 assert(_component_mirror_offset != 0, "must be set");
1276 assert(java_lang_Class::as_Klass(java_class) != nullptr &&
1277 java_lang_Class::as_Klass(java_class)->is_array_klass(), "must be");
1278 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1279 }
1280
1281 oop java_lang_Class::component_mirror(oop java_class) {
1282 assert(_component_mirror_offset != 0, "must be set");
1283 return java_class->obj_field(_component_mirror_offset);
1284 }
1285
1286 oop java_lang_Class::init_lock(oop java_class) {
1287 assert(_init_lock_offset != 0, "must be set");
1288 return java_class->obj_field(_init_lock_offset);
1289 }
1290 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1291 assert(_init_lock_offset != 0, "must be set");
1292 java_class->obj_field_put(_init_lock_offset, init_lock);
1293 }
1294
1295 objArrayOop java_lang_Class::signers(oop java_class) {
1296 assert(_signers_offset != 0, "must be set");
1297 return (objArrayOop)java_class->obj_field(_signers_offset);
1298 }
1299
1300 oop java_lang_Class::class_data(oop java_class) {
1301 assert(_classData_offset != 0, "must be set");
1302 return java_class->obj_field(_classData_offset);
1303 }
1304 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1305 assert(_classData_offset != 0, "must be set");
1306 java_class->obj_field_put(_classData_offset, class_data);
1307 }
1308
1309 void java_lang_Class::set_reflection_data(oop java_class, oop reflection_data) {
1310 assert(_reflectionData_offset != 0, "must be set");
1311 java_class->obj_field_put(_reflectionData_offset, reflection_data);
1312 }
1313
1314 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1315 assert(_class_loader_offset != 0, "offsets should have been initialized");
1316 java_class->obj_field_put(_class_loader_offset, loader);
1317 }
1318
1319 oop java_lang_Class::class_loader(oop java_class) {
1320 assert(_class_loader_offset != 0, "must be set");
1321 return java_class->obj_field(_class_loader_offset);
1322 }
1323
1324 oop java_lang_Class::module(oop java_class) {
1325 assert(_module_offset != 0, "must be set");
1326 return java_class->obj_field(_module_offset);
1327 }
1328
1329 void java_lang_Class::set_module(oop java_class, oop module) {
1330 assert(_module_offset != 0, "must be set");
1331 java_class->obj_field_put(_module_offset, module);
1332 }
1333
1334 oop java_lang_Class::name(Handle java_class, TRAPS) {
1335 assert(_name_offset != 0, "must be set");
1336 oop o = java_class->obj_field(_name_offset);
1337 if (o == nullptr) {
1338 o = StringTable::intern(as_external_name(java_class()), THREAD);
1339 java_class->obj_field_put(_name_offset, o);
1340 }
1341 return o;
1342 }
1343
1344 oop java_lang_Class::source_file(oop java_class) {
1345 assert(_source_file_offset != 0, "must be set");
1346 return java_class->obj_field(_source_file_offset);
1347 }
1348
1349 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1350 assert(_source_file_offset != 0, "must be set");
1351 java_class->obj_field_put(_source_file_offset, source_file);
1352 }
1353
1354 void java_lang_Class::set_is_primitive(oop java_class) {
1355 assert(_is_primitive_offset != 0, "must be set");
1356 java_class->bool_field_put(_is_primitive_offset, true);
1357 }
1358
1359
1360 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1361 // Mirrors for basic types have a null klass field, which makes them special.
1362 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1363 if (type != T_VOID) {
1364 Klass* aklass = Universe::typeArrayKlass(type);
1365 assert(aklass != nullptr, "correct bootstrap");
1366 release_set_array_klass(java_class, aklass);
1367 }
1368 #ifdef ASSERT
1369 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1370 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1371 #endif
1372 set_modifiers(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
1373 set_is_primitive(java_class);
1374 return java_class;
1375 }
1376
1377 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1378 assert(is_instance(java_class), "must be a Class object");
1379 java_class->metadata_field_put(_klass_offset, klass);
1380 }
1381
1382
1383 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1384 assert(is_instance(java_class), "must be a Class object");
1385 Symbol* name = nullptr;
1386 bool is_instance = false;
1387 if (is_primitive(java_class)) {
1388 name = vmSymbols::type_signature(primitive_type(java_class));
1389 } else {
1390 Klass* k = as_Klass(java_class);
1391 is_instance = k->is_instance_klass();
1392 name = k->name();
1393 }
1394 if (name == nullptr) {
1395 st->print("<null>");
1396 return;
1397 }
1398 if (is_instance) st->print("L");
1399 st->write((char*) name->base(), (int) name->utf8_length());
1400 if (is_instance) st->print(";");
1401 }
1402
1403 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1404 assert(is_instance(java_class), "must be a Class object");
1405 Symbol* name;
1406 if (is_primitive(java_class)) {
1407 name = vmSymbols::type_signature(primitive_type(java_class));
1408 // Because this can create a new symbol, the caller has to decrement
1409 // the refcount, so make adjustment here and below for symbols returned
1410 // that are not created or incremented due to a successful lookup.
1411 name->increment_refcount();
1412 } else {
1413 Klass* k = as_Klass(java_class);
1414 if (!k->is_instance_klass()) {
1415 name = k->name();
1416 name->increment_refcount();
1417 } else {
1418 ResourceMark rm;
1419 const char* sigstr = k->signature_name();
1420 int siglen = (int) strlen(sigstr);
1421 if (!intern_if_not_found) {
1422 name = SymbolTable::probe(sigstr, siglen);
1423 } else {
1424 name = SymbolTable::new_symbol(sigstr, siglen);
1425 }
1426 }
1427 }
1428 return name;
1429 }
1430
1431 // Returns the Java name for this Java mirror (Resource allocated)
1432 // See Klass::external_name().
1433 // For primitive type Java mirrors, its type name is returned.
1434 const char* java_lang_Class::as_external_name(oop java_class) {
1435 assert(is_instance(java_class), "must be a Class object");
1436 const char* name = nullptr;
1437 if (is_primitive(java_class)) {
1438 name = type2name(primitive_type(java_class));
1439 } else {
1440 name = as_Klass(java_class)->external_name();
1441 }
1442 if (name == nullptr) {
1443 name = "<null>";
1444 }
1445 return name;
1446 }
1447
1448 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1449 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1450 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass");
1451 return k;
1452 }
1453
1454
1455 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1456 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1457 java_class->release_metadata_field_put(_array_klass_offset, klass);
1458 }
1459
1460
1461 BasicType java_lang_Class::primitive_type(oop java_class) {
1462 assert(is_primitive(java_class), "just checking");
1463 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1464 BasicType type = T_VOID;
1465 if (ak != nullptr) {
1466 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1467 type = ArrayKlass::cast(ak)->element_type();
1468 } else {
1469 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1470 }
1471 #ifdef ASSERT
1472 if (CDSConfig::is_dumping_heap()) {
1473 oop mirror = Universe::java_mirror(type);
1474 oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1475 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1476 } else {
1477 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1478 }
1479 #endif
1480 return type;
1481 }
1482
1483 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1484 assert(is_instance(java_class), "must be a Class object");
1485 if (is_primitive(java_class)) {
1486 if (reference_klass != nullptr)
1487 (*reference_klass) = nullptr;
1488 return primitive_type(java_class);
1489 } else {
1490 if (reference_klass != nullptr)
1491 (*reference_klass) = as_Klass(java_class);
1492 return T_OBJECT;
1493 }
1494 }
1495
1496
1497 oop java_lang_Class::primitive_mirror(BasicType t) {
1498 oop mirror = Universe::java_mirror(t);
1499 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1500 assert(is_primitive(mirror), "must be primitive");
1501 return mirror;
1502 }
1503
1504 #define CLASS_FIELDS_DO(macro) \
1505 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1506 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1507 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1508 macro(_module_offset, k, "module", module_signature, false); \
1509 macro(_name_offset, k, "name", string_signature, false); \
1510 macro(_classData_offset, k, "classData", object_signature, false); \
1511 macro(_reflectionData_offset, k, "reflectionData", java_lang_ref_SoftReference_signature, false); \
1512 macro(_signers_offset, k, "signers", object_array_signature, false); \
1513 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), char_signature, false); \
1514 macro(_protection_domain_offset, k, "protectionDomain", java_security_ProtectionDomain_signature, false); \
1515 macro(_is_primitive_offset, k, "primitive", bool_signature, false);
1516
1517 void java_lang_Class::compute_offsets() {
1518 if (_offsets_computed) {
1519 return;
1520 }
1521
1522 _offsets_computed = true;
1523
1524 InstanceKlass* k = vmClasses::Class_klass();
1525 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1526 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1527 }
1528
1529 #if INCLUDE_CDS
1530 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1531 f->do_bool(&_offsets_computed);
1532
1533 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1534
1535 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1536 }
1537 #endif
1538
1539 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1540 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1541 return the_class_mirror->int_field(_classRedefinedCount_offset);
1542 }
1543
1544 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1545 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1546 the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1547 }
1548
1549 int java_lang_Class::modifiers(oop the_class_mirror) {
1550 assert(_modifiers_offset != 0, "offsets should have been initialized");
1551 return the_class_mirror->char_field(_modifiers_offset);
1552 }
1553
1554 void java_lang_Class::set_modifiers(oop the_class_mirror, u2 value) {
1555 assert(_modifiers_offset != 0, "offsets should have been initialized");
1556 the_class_mirror->char_field_put(_modifiers_offset, value);
1557 }
1558
1559
1560 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1561 // platform thread structure, and a eetop offset which was used for thread
1562 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1563 // merged, so in the HotSpot VM we just use the eetop field for the thread
1564 // instead of the privateInfo_offset.
1565 //
1566 // Note: The stackSize field is only present starting in 1.4.
1567
1568 int java_lang_Thread_FieldHolder::_group_offset;
1569 int java_lang_Thread_FieldHolder::_priority_offset;
1570 int java_lang_Thread_FieldHolder::_stackSize_offset;
1571 int java_lang_Thread_FieldHolder::_daemon_offset;
1572 int java_lang_Thread_FieldHolder::_thread_status_offset;
1573
1574 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1575 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1576 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1577 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1578 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1579 macro(_thread_status_offset, k, "threadStatus", int_signature, false)
1580
1581 void java_lang_Thread_FieldHolder::compute_offsets() {
1582 assert(_group_offset == 0, "offsets should be initialized only once");
1583
1584 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1585 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1586 }
1587
1588 #if INCLUDE_CDS
1589 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1590 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1591 }
1592 #endif
1593
1594 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1595 return holder->obj_field(_group_offset);
1596 }
1597
1598 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1599 return (ThreadPriority)holder->int_field(_priority_offset);
1600 }
1601
1602 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1603 holder->int_field_put(_priority_offset, priority);
1604 }
1605
1606 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1607 return holder->long_field(_stackSize_offset);
1608 }
1609
1610 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1611 return holder->bool_field(_daemon_offset) != 0;
1612 }
1613
1614 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1615 assert(val, "daemon status is never turned off");
1616 holder->bool_field_put(_daemon_offset, val);
1617 }
1618
1619 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1620 holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1621 }
1622
1623 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1624 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1625 }
1626
1627
1628 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1629
1630 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1631 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true);
1632
1633 void java_lang_Thread_Constants::compute_offsets() {
1634 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1635
1636 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1637 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1638 }
1639
1640 #if INCLUDE_CDS
1641 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1642 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1643 }
1644 #endif
1645
1646 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1647 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1648 oop base = k->static_field_base_raw();
1649 return base->obj_field(_static_VTHREAD_GROUP_offset);
1650 }
1651
1652
1653 int java_lang_Thread::_holder_offset;
1654 int java_lang_Thread::_name_offset;
1655 int java_lang_Thread::_contextClassLoader_offset;
1656 int java_lang_Thread::_eetop_offset;
1657 int java_lang_Thread::_jvmti_thread_state_offset;
1658 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1659 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1660 int java_lang_Thread::_interrupted_offset;
1661 int java_lang_Thread::_interruptLock_offset;
1662 int java_lang_Thread::_tid_offset;
1663 int java_lang_Thread::_continuation_offset;
1664 int java_lang_Thread::_park_blocker_offset;
1665 int java_lang_Thread::_scopedValueBindings_offset;
1666 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1667
1668 #define THREAD_FIELDS_DO(macro) \
1669 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \
1670 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1671 macro(_contextClassLoader_offset, k, "contextClassLoader", classloader_signature, false); \
1672 macro(_eetop_offset, k, "eetop", long_signature, false); \
1673 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1674 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \
1675 macro(_tid_offset, k, "tid", long_signature, false); \
1676 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1677 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1678 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1679
1680 void java_lang_Thread::compute_offsets() {
1681 assert(_holder_offset == 0, "offsets should be initialized only once");
1682
1683 InstanceKlass* k = vmClasses::Thread_klass();
1684 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1685 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1686 }
1687
1688 #if INCLUDE_CDS
1689 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1690 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1691 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1692 }
1693 #endif
1694
1695 JavaThread* java_lang_Thread::thread(oop java_thread) {
1696 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1697 }
1698
1699 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1700 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1701 }
1702
1703 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1704 java_thread->address_field_put(_eetop_offset, (address)thread);
1705 }
1706
1707 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1708 java_thread->release_address_field_put(_eetop_offset, (address)thread);
1709 }
1710
1711 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1712 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1713 }
1714
1715 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1716 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1717 }
1718
1719 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1720 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1721 }
1722
1723 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1724 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1725 int val = VTMS_transition_disable_count(java_thread);
1726 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1727 }
1728
1729 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1730 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1731 int val = VTMS_transition_disable_count(java_thread);
1732 assert(val > 0, "VTMS_transition_disable_count should never be negative");
1733 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1734 }
1735
1736 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1737 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1738 }
1739
1740 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1741 assert(is_in_VTMS_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside");
1742 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1743 }
1744
1745 int java_lang_Thread::is_in_VTMS_transition_offset() {
1746 return _jvmti_is_in_VTMS_transition_offset;
1747 }
1748
1749 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1750 assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1751 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1752 }
1753
1754 oop java_lang_Thread::holder(oop java_thread) {
1755 // Note: may return null if the thread is still attaching
1756 return java_thread->obj_field(_holder_offset);
1757 }
1758 oop java_lang_Thread::interrupt_lock(oop java_thread) {
1759 return java_thread->obj_field(_interruptLock_offset);
1760 }
1761
1762 bool java_lang_Thread::interrupted(oop java_thread) {
1763 // Make sure the caller can safely access oops.
1764 assert(Thread::current()->is_VM_thread() ||
1765 (JavaThread::current()->thread_state() != _thread_blocked &&
1766 JavaThread::current()->thread_state() != _thread_in_native),
1767 "Unsafe access to oop");
1768 return java_thread->bool_field_volatile(_interrupted_offset);
1769 }
1770
1771 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1772 // Make sure the caller can safely access oops.
1773 assert(Thread::current()->is_VM_thread() ||
1774 (JavaThread::current()->thread_state() != _thread_blocked &&
1775 JavaThread::current()->thread_state() != _thread_in_native),
1776 "Unsafe access to oop");
1777 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1778 }
1779
1780
1781 oop java_lang_Thread::name(oop java_thread) {
1782 return java_thread->obj_field(_name_offset);
1783 }
1784
1785
1786 void java_lang_Thread::set_name(oop java_thread, oop name) {
1787 java_thread->obj_field_put(_name_offset, name);
1788 }
1789
1790 // Convenience macros for setting and getting Thread fields that
1791 // are actually stored in the FieldHolder object of the thread.
1792 // The FieldHolder can be null whilst a thread is attaching via
1793 // JNI, and when the main thread is attaching.
1794
1795 // The default value should be the default/zero initialized value
1796 // of the field as it would be in java.lang.Thread.FieldHolder.
1797 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \
1798 { \
1799 oop holder = java_lang_Thread::holder(java_thread); \
1800 if (holder != nullptr) \
1801 return java_lang_Thread_FieldHolder::field(holder); \
1802 else \
1803 return default_val; \
1804 }
1805
1806 // We should never be trying to set a field of an attaching thread.
1807 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \
1808 { \
1809 oop holder = java_lang_Thread::holder(java_thread); \
1810 assert(holder != nullptr, "Thread not fully initialized"); \
1811 java_lang_Thread_FieldHolder::set_##field(holder, value); \
1812 }
1813
1814
1815 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1816 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1817 }
1818
1819
1820 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1821 SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1822 }
1823
1824
1825 oop java_lang_Thread::threadGroup(oop java_thread) {
1826 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1827 }
1828
1829
1830 bool java_lang_Thread::is_alive(oop java_thread) {
1831 JavaThread* thr = java_lang_Thread::thread(java_thread);
1832 return (thr != nullptr);
1833 }
1834
1835
1836 bool java_lang_Thread::is_daemon(oop java_thread) {
1837 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1838 }
1839
1840
1841 void java_lang_Thread::set_daemon(oop java_thread) {
1842 SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1843 }
1844
1845 oop java_lang_Thread::context_class_loader(oop java_thread) {
1846 return java_thread->obj_field(_contextClassLoader_offset);
1847 }
1848
1849
1850 jlong java_lang_Thread::stackSize(oop java_thread) {
1851 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1852 }
1853
1854 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1855 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1856 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1857 }
1858
1859 // Read thread status value from threadStatus field in java.lang.Thread java class.
1860 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1861 // Make sure the caller is operating on behalf of the VM or is
1862 // running VM code (state == _thread_in_vm).
1863 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1864 JavaThread::current()->thread_state() == _thread_in_vm,
1865 "Java Thread is not running in vm");
1866 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1867 }
1868
1869 ByteSize java_lang_Thread::thread_id_offset() {
1870 return in_ByteSize(_tid_offset);
1871 }
1872
1873 oop java_lang_Thread::park_blocker(oop java_thread) {
1874 return java_thread->obj_field(_park_blocker_offset);
1875 }
1876
1877 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) {
1878 ThreadsListHandle tlh(JavaThread::current());
1879 JavaThread* thread;
1880 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread);
1881 if (is_virtual) {
1882 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread);
1883 if (carrier_thread == nullptr) {
1884 return nullptr;
1885 }
1886 thread = java_lang_Thread::thread(carrier_thread);
1887 } else {
1888 thread = java_lang_Thread::thread(java_thread);
1889 }
1890 if (thread == nullptr) {
1891 return nullptr;
1892 }
1893
1894 class GetStackTraceClosure : public HandshakeClosure {
1895 public:
1896 const Handle _java_thread;
1897 int _depth;
1898 bool _retry_handshake;
1899 GrowableArray<Method*>* _methods;
1900 GrowableArray<int>* _bcis;
1901
1902 GetStackTraceClosure(Handle java_thread) :
1903 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false),
1904 _methods(nullptr), _bcis(nullptr) {
1905 }
1906 ~GetStackTraceClosure() {
1907 delete _methods;
1908 delete _bcis;
1909 }
1910
1911 bool read_reset_retry() {
1912 bool ret = _retry_handshake;
1913 // If we re-execute the handshake this method need to return false
1914 // when the handshake cannot be performed. (E.g. thread terminating)
1915 _retry_handshake = false;
1916 return ret;
1917 }
1918
1919 void do_thread(Thread* th) {
1920 if (!Thread::current()->is_Java_thread()) {
1921 _retry_handshake = true;
1922 return;
1923 }
1924
1925 JavaThread* thread = JavaThread::cast(th);
1926
1927 if (!thread->has_last_Java_frame()) {
1928 return;
1929 }
1930
1931 bool carrier = false;
1932 if (java_lang_VirtualThread::is_instance(_java_thread())) {
1933 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
1934 const ContinuationEntry* ce = thread->vthread_continuation();
1935 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) {
1936 return; // not mounted
1937 }
1938 } else {
1939 carrier = (thread->vthread_continuation() != nullptr);
1940 }
1941
1942 const int max_depth = MaxJavaStackTraceDepth;
1943 const bool skip_hidden = !ShowHiddenFrames;
1944
1945 // Pick minimum length that will cover most cases
1946 int init_length = 64;
1947 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1948 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
1949
1950 int total_count = 0;
1951 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops
1952 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
1953 vfst.next()) {
1954
1955 if (skip_hidden && (vfst.method()->is_hidden() ||
1956 vfst.method()->is_continuation_enter_intrinsic())) {
1957 continue;
1958 }
1959
1960 _methods->push(vfst.method());
1961 _bcis->push(vfst.bci());
1962 total_count++;
1963 }
1964
1965 _depth = total_count;
1966 }
1967 };
1968
1969 // Handshake with target
1970 ResourceMark rm(THREAD);
1971 HandleMark hm(THREAD);
1972 GetStackTraceClosure gstc(Handle(THREAD, java_thread));
1973 do {
1974 Handshake::execute(&gstc, &tlh, thread);
1975 } while (gstc.read_reset_retry());
1976
1977 // Stop if no stack trace is found.
1978 if (gstc._depth == 0) {
1979 return nullptr;
1980 }
1981
1982 // Convert to StackTraceElement array
1983 InstanceKlass* k = vmClasses::StackTraceElement_klass();
1984 assert(k != nullptr, "must be loaded in 1.4+");
1985 if (k->should_be_initialized()) {
1986 k->initialize(CHECK_NULL);
1987 }
1988 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL);
1989
1990 for (int i = 0; i < gstc._depth; i++) {
1991 methodHandle method(THREAD, gstc._methods->at(i));
1992 oop element = java_lang_StackTraceElement::create(method,
1993 gstc._bcis->at(i),
1994 CHECK_NULL);
1995 trace->obj_at_put(i, element);
1996 }
1997
1998 return trace();
1999 }
2000
2001 const char* java_lang_Thread::thread_status_name(oop java_thread) {
2002 JavaThreadStatus status = get_thread_status(java_thread);
2003 switch (status) {
2004 case JavaThreadStatus::NEW : return "NEW";
2005 case JavaThreadStatus::RUNNABLE : return "RUNNABLE";
2006 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)";
2007 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)";
2008 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
2009 case JavaThreadStatus::PARKED : return "WAITING (parking)";
2010 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)";
2011 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
2012 case JavaThreadStatus::TERMINATED : return "TERMINATED";
2013 default : return "UNKNOWN";
2014 };
2015 }
2016 int java_lang_ThreadGroup::_parent_offset;
2017 int java_lang_ThreadGroup::_name_offset;
2018 int java_lang_ThreadGroup::_maxPriority_offset;
2019 int java_lang_ThreadGroup::_daemon_offset;
2020
2021 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
2022 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2023 return java_thread_group->obj_field(_parent_offset);
2024 }
2025
2026 // ("name as oop" accessor is not necessary)
2027
2028 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
2029 oop name = java_thread_group->obj_field(_name_offset);
2030 // ThreadGroup.name can be null
2031 if (name != nullptr) {
2032 return java_lang_String::as_utf8_string(name);
2033 }
2034 return nullptr;
2035 }
2036
2037 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
2038 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2039 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
2040 }
2041
2042 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
2043 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2044 return java_thread_group->bool_field(_daemon_offset) != 0;
2045 }
2046
2047 #define THREADGROUP_FIELDS_DO(macro) \
2048 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
2049 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
2050 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
2051 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false);
2052
2053 void java_lang_ThreadGroup::compute_offsets() {
2054 assert(_parent_offset == 0, "offsets should be initialized only once");
2055
2056 InstanceKlass* k = vmClasses::ThreadGroup_klass();
2057 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2058 }
2059
2060 #if INCLUDE_CDS
2061 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
2062 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2063 }
2064 #endif
2065
2066
2067 // java_lang_VirtualThread
2068
2069 int java_lang_VirtualThread::static_vthread_scope_offset;
2070 int java_lang_VirtualThread::_carrierThread_offset;
2071 int java_lang_VirtualThread::_continuation_offset;
2072 int java_lang_VirtualThread::_state_offset;
2073 int java_lang_VirtualThread::_next_offset;
2074 int java_lang_VirtualThread::_onWaitingList_offset;
2075 int java_lang_VirtualThread::_notified_offset;
2076 int java_lang_VirtualThread::_timeout_offset;
2077 int java_lang_VirtualThread::_objectWaiter_offset;
2078
2079 #define VTHREAD_FIELDS_DO(macro) \
2080 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \
2081 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \
2082 macro(_continuation_offset, k, "cont", continuation_signature, false); \
2083 macro(_state_offset, k, "state", int_signature, false); \
2084 macro(_next_offset, k, "next", vthread_signature, false); \
2085 macro(_onWaitingList_offset, k, "onWaitingList", bool_signature, false); \
2086 macro(_notified_offset, k, "notified", bool_signature, false); \
2087 macro(_timeout_offset, k, "timeout", long_signature, false);
2088
2089
2090 void java_lang_VirtualThread::compute_offsets() {
2091 InstanceKlass* k = vmClasses::VirtualThread_klass();
2092 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2093 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2094 }
2095
2096 bool java_lang_VirtualThread::is_instance(oop obj) {
2097 return obj != nullptr && is_subclass(obj->klass());
2098 }
2099
2100 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
2101 oop thread = vthread->obj_field(_carrierThread_offset);
2102 return thread;
2103 }
2104
2105 oop java_lang_VirtualThread::continuation(oop vthread) {
2106 oop cont = vthread->obj_field(_continuation_offset);
2107 return cont;
2108 }
2109
2110 int java_lang_VirtualThread::state(oop vthread) {
2111 return vthread->int_field_acquire(_state_offset);
2112 }
2113
2114 void java_lang_VirtualThread::set_state(oop vthread, int state) {
2115 vthread->release_int_field_put(_state_offset, state);
2116 }
2117
2118 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) {
2119 jint* addr = vthread->field_addr<jint>(_state_offset);
2120 int res = Atomic::cmpxchg(addr, old_state, new_state);
2121 return res;
2122 }
2123
2124 oop java_lang_VirtualThread::next(oop vthread) {
2125 return vthread->obj_field(_next_offset);
2126 }
2127
2128 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) {
2129 vthread->obj_field_put(_next_offset, next_vthread);
2130 }
2131
2132 // Add vthread to the waiting list if it's not already in it. Multiple threads
2133 // could be trying to add vthread to the list at the same time, so we control
2134 // access with a cmpxchg on onWaitingList. The winner adds vthread to the list.
2135 // Method returns true if we added vthread to the list, false otherwise.
2136 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) {
2137 jboolean* addr = vthread->field_addr<jboolean>(_onWaitingList_offset);
2138 jboolean vthread_on_list = Atomic::load(addr);
2139 if (!vthread_on_list) {
2140 vthread_on_list = Atomic::cmpxchg(addr, (jboolean)JNI_FALSE, (jboolean)JNI_TRUE);
2141 if (!vthread_on_list) {
2142 for (;;) {
2143 oop head = list_head.resolve();
2144 java_lang_VirtualThread::set_next(vthread, head);
2145 if (list_head.cmpxchg(head, vthread) == head) return true;
2146 }
2147 }
2148 }
2149 return false; // already on waiting list
2150 }
2151
2152 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) {
2153 vthread->bool_field_put_volatile(_notified_offset, value);
2154 }
2155
2156 jlong java_lang_VirtualThread::timeout(oop vthread) {
2157 return vthread->long_field(_timeout_offset);
2158 }
2159
2160 void java_lang_VirtualThread::set_timeout(oop vthread, jlong value) {
2161 vthread->long_field_put(_timeout_offset, value);
2162 }
2163
2164 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2165 JavaThreadStatus status = JavaThreadStatus::NEW;
2166 switch (state & ~SUSPENDED) {
2167 case NEW:
2168 status = JavaThreadStatus::NEW;
2169 break;
2170 case STARTED:
2171 case RUNNING:
2172 case PARKING:
2173 case TIMED_PARKING:
2174 case UNPARKED:
2175 case YIELDING:
2176 case YIELDED:
2177 case UNBLOCKED:
2178 case WAITING:
2179 case TIMED_WAITING:
2180 status = JavaThreadStatus::RUNNABLE;
2181 break;
2182 case PARKED:
2183 case PINNED:
2184 status = JavaThreadStatus::PARKED;
2185 break;
2186 case TIMED_PARKED:
2187 case TIMED_PINNED:
2188 status = JavaThreadStatus::PARKED_TIMED;
2189 break;
2190 case BLOCKING:
2191 case BLOCKED:
2192 status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER;
2193 break;
2194 case WAIT:
2195 status = JavaThreadStatus::IN_OBJECT_WAIT;
2196 break;
2197 case TIMED_WAIT:
2198 status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED;
2199 break;
2200 case TERMINATED:
2201 status = JavaThreadStatus::TERMINATED;
2202 break;
2203 default:
2204 ShouldNotReachHere();
2205 }
2206 return status;
2207 }
2208
2209 ObjectMonitor* java_lang_VirtualThread::current_pending_monitor(oop vthread) {
2210 ObjectWaiter* waiter = objectWaiter(vthread);
2211 if (waiter != nullptr && waiter->at_monitorenter()) {
2212 return waiter->monitor();
2213 }
2214 return nullptr;
2215 }
2216
2217 ObjectMonitor* java_lang_VirtualThread::current_waiting_monitor(oop vthread) {
2218 ObjectWaiter* waiter = objectWaiter(vthread);
2219 if (waiter != nullptr && waiter->is_wait()) {
2220 return waiter->monitor();
2221 }
2222 return nullptr;
2223 }
2224
2225 bool java_lang_VirtualThread::is_preempted(oop vthread) {
2226 oop continuation = java_lang_VirtualThread::continuation(vthread);
2227 assert(continuation != nullptr, "vthread with no continuation");
2228 stackChunkOop chunk = jdk_internal_vm_Continuation::tail(continuation);
2229 return chunk != nullptr && chunk->preempted();
2230 }
2231
2232 #if INCLUDE_CDS
2233 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2234 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2235 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2236 }
2237 #endif
2238
2239 // java_lang_Throwable
2240
2241 int java_lang_Throwable::_backtrace_offset;
2242 int java_lang_Throwable::_detailMessage_offset;
2243 int java_lang_Throwable::_stackTrace_offset;
2244 int java_lang_Throwable::_depth_offset;
2245 int java_lang_Throwable::_cause_offset;
2246 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2247
2248 #define THROWABLE_FIELDS_DO(macro) \
2249 macro(_backtrace_offset, k, "backtrace", object_signature, false); \
2250 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \
2251 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2252 macro(_depth_offset, k, "depth", int_signature, false); \
2253 macro(_cause_offset, k, "cause", throwable_signature, false); \
2254 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2255
2256 void java_lang_Throwable::compute_offsets() {
2257 InstanceKlass* k = vmClasses::Throwable_klass();
2258 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2259 }
2260
2261 #if INCLUDE_CDS
2262 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2263 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2264 }
2265 #endif
2266
2267 oop java_lang_Throwable::unassigned_stacktrace() {
2268 InstanceKlass* ik = vmClasses::Throwable_klass();
2269 oop base = ik->static_field_base_raw();
2270 return base->obj_field(_static_unassigned_stacktrace_offset);
2271 }
2272
2273 oop java_lang_Throwable::backtrace(oop throwable) {
2274 return throwable->obj_field_acquire(_backtrace_offset);
2275 }
2276
2277
2278 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2279 throwable->release_obj_field_put(_backtrace_offset, value);
2280 }
2281
2282 int java_lang_Throwable::depth(oop throwable) {
2283 return throwable->int_field(_depth_offset);
2284 }
2285
2286 void java_lang_Throwable::set_depth(oop throwable, int value) {
2287 throwable->int_field_put(_depth_offset, value);
2288 }
2289
2290 oop java_lang_Throwable::message(oop throwable) {
2291 return throwable->obj_field(_detailMessage_offset);
2292 }
2293
2294 const char* java_lang_Throwable::message_as_utf8(oop throwable) {
2295 oop msg = java_lang_Throwable::message(throwable);
2296 const char* msg_utf8 = nullptr;
2297 if (msg != nullptr) {
2298 msg_utf8 = java_lang_String::as_utf8_string(msg);
2299 }
2300 return msg_utf8;
2301 }
2302
2303 oop java_lang_Throwable::cause(oop throwable) {
2304 return throwable->obj_field(_cause_offset);
2305 }
2306
2307 void java_lang_Throwable::set_message(oop throwable, oop value) {
2308 throwable->obj_field_put(_detailMessage_offset, value);
2309 }
2310
2311
2312 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2313 throwable->obj_field_put(_stackTrace_offset, st_element_array);
2314 }
2315
2316 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2317 set_stacktrace(throwable, nullptr);
2318 }
2319
2320
2321 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2322 ResourceMark rm;
2323 Klass* k = throwable->klass();
2324 assert(k != nullptr, "just checking");
2325 st->print("%s", k->external_name());
2326 oop msg = message(throwable);
2327 if (msg != nullptr) {
2328 st->print(": %s", java_lang_String::as_utf8_string(msg));
2329 }
2330 }
2331
2332 // After this many redefines, the stack trace is unreliable.
2333 const int MAX_VERSION = USHRT_MAX;
2334
2335 static inline bool version_matches(Method* method, int version) {
2336 assert(version < MAX_VERSION, "version is too big");
2337 return method != nullptr && (method->constants()->version() == version);
2338 }
2339
2340 // This class provides a simple wrapper over the internal structure of
2341 // exception backtrace to insulate users of the backtrace from needing
2342 // to know what it looks like.
2343 // The code of this class is not GC safe. Allocations can only happen
2344 // in expand().
2345 class BacktraceBuilder: public StackObj {
2346 friend class BacktraceIterator;
2347 private:
2348 Handle _backtrace;
2349 objArrayOop _head;
2350 typeArrayOop _methods;
2351 typeArrayOop _bcis;
2352 objArrayOop _mirrors;
2353 typeArrayOop _names; // Needed to insulate method name against redefinition.
2354 // True if the top frame of the backtrace is omitted because it shall be hidden.
2355 bool _has_hidden_top_frame;
2356 int _index;
2357 NoSafepointVerifier _nsv;
2358
2359 enum {
2360 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2361 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2362 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2363 trace_names_offset = java_lang_Throwable::trace_names_offset,
2364 trace_conts_offset = java_lang_Throwable::trace_conts_offset,
2365 trace_next_offset = java_lang_Throwable::trace_next_offset,
2366 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2367 trace_size = java_lang_Throwable::trace_size,
2368 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2369 };
2370
2371 // get info out of chunks
2372 static typeArrayOop get_methods(objArrayHandle chunk) {
2373 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2374 assert(methods != nullptr, "method array should be initialized in backtrace");
2375 return methods;
2376 }
2377 static typeArrayOop get_bcis(objArrayHandle chunk) {
2378 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2379 assert(bcis != nullptr, "bci array should be initialized in backtrace");
2380 return bcis;
2381 }
2382 static objArrayOop get_mirrors(objArrayHandle chunk) {
2383 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2384 assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2385 return mirrors;
2386 }
2387 static typeArrayOop get_names(objArrayHandle chunk) {
2388 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2389 assert(names != nullptr, "names array should be initialized in backtrace");
2390 return names;
2391 }
2392 static bool has_hidden_top_frame(objArrayHandle chunk) {
2393 oop hidden = chunk->obj_at(trace_hidden_offset);
2394 return hidden != nullptr;
2395 }
2396
2397 public:
2398
2399 // constructor for new backtrace
2400 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2401 expand(CHECK);
2402 _backtrace = Handle(THREAD, _head);
2403 _index = 0;
2404 }
2405
2406 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2407 _methods = get_methods(backtrace);
2408 _bcis = get_bcis(backtrace);
2409 _mirrors = get_mirrors(backtrace);
2410 _names = get_names(backtrace);
2411 _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2412 assert(_methods->length() == _bcis->length() &&
2413 _methods->length() == _mirrors->length() &&
2414 _mirrors->length() == _names->length(),
2415 "method and source information arrays should match");
2416
2417 // head is the preallocated backtrace
2418 _head = backtrace();
2419 _backtrace = Handle(thread, _head);
2420 _index = 0;
2421 }
2422
2423 void expand(TRAPS) {
2424 objArrayHandle old_head(THREAD, _head);
2425 PauseNoSafepointVerifier pnsv(&_nsv);
2426
2427 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2428 objArrayHandle new_head(THREAD, head);
2429
2430 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2431 typeArrayHandle new_methods(THREAD, methods);
2432
2433 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2434 typeArrayHandle new_bcis(THREAD, bcis);
2435
2436 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2437 objArrayHandle new_mirrors(THREAD, mirrors);
2438
2439 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2440 typeArrayHandle new_names(THREAD, names);
2441
2442 if (!old_head.is_null()) {
2443 old_head->obj_at_put(trace_next_offset, new_head());
2444 }
2445 new_head->obj_at_put(trace_methods_offset, new_methods());
2446 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2447 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2448 new_head->obj_at_put(trace_names_offset, new_names());
2449 new_head->obj_at_put(trace_hidden_offset, nullptr);
2450
2451 _head = new_head();
2452 _methods = new_methods();
2453 _bcis = new_bcis();
2454 _mirrors = new_mirrors();
2455 _names = new_names();
2456 _index = 0;
2457 }
2458
2459 oop backtrace() {
2460 return _backtrace();
2461 }
2462
2463 inline void push(Method* method, int bci, TRAPS) {
2464 // Smear the -1 bci to 0 since the array only holds unsigned
2465 // shorts. The later line number lookup would just smear the -1
2466 // to a 0 even if it could be recorded.
2467 if (bci == SynchronizationEntryBCI) bci = 0;
2468
2469 if (_index >= trace_chunk_size) {
2470 methodHandle mhandle(THREAD, method);
2471 expand(CHECK);
2472 method = mhandle();
2473 }
2474
2475 _methods->ushort_at_put(_index, method->orig_method_idnum());
2476 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2477
2478 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2479 // klass owning the symbols alive so their refcounts aren't decremented.
2480 Symbol* name = method->name();
2481 _names->symbol_at_put(_index, name);
2482
2483 // We need to save the mirrors in the backtrace to keep the class
2484 // from being unloaded while we still have this stack trace.
2485 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2486 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2487
2488 _index++;
2489 }
2490
2491 void set_has_hidden_top_frame() {
2492 if (!_has_hidden_top_frame) {
2493 // It would be nice to add java/lang/Boolean::TRUE here
2494 // to indicate that this backtrace has a hidden top frame.
2495 // But this code is used before TRUE is allocated.
2496 // Therefore let's just use an arbitrary legal oop
2497 // available right here. _methods is a short[].
2498 assert(_methods != nullptr, "we need a legal oop");
2499 _has_hidden_top_frame = true;
2500 _head->obj_at_put(trace_hidden_offset, _methods);
2501 }
2502 }
2503 };
2504
2505 struct BacktraceElement : public StackObj {
2506 int _method_id;
2507 int _bci;
2508 int _version;
2509 Symbol* _name;
2510 Handle _mirror;
2511 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2512 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2513 };
2514
2515 class BacktraceIterator : public StackObj {
2516 int _index;
2517 objArrayHandle _result;
2518 objArrayHandle _mirrors;
2519 typeArrayHandle _methods;
2520 typeArrayHandle _bcis;
2521 typeArrayHandle _names;
2522
2523 void init(objArrayHandle result, Thread* thread) {
2524 // Get method id, bci, version and mirror from chunk
2525 _result = result;
2526 if (_result.not_null()) {
2527 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2528 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2529 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2530 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2531 _index = 0;
2532 }
2533 }
2534 public:
2535 BacktraceIterator(objArrayHandle result, Thread* thread) {
2536 init(result, thread);
2537 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2538 }
2539
2540 BacktraceElement next(Thread* thread) {
2541 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2542 _methods->ushort_at(_index),
2543 Backtrace::version_at(_bcis->int_at(_index)),
2544 Backtrace::bci_at(_bcis->int_at(_index)),
2545 _names->symbol_at(_index));
2546 _index++;
2547
2548 if (_index >= java_lang_Throwable::trace_chunk_size) {
2549 int next_offset = java_lang_Throwable::trace_next_offset;
2550 // Get next chunk
2551 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2552 init(result, thread);
2553 }
2554 return e;
2555 }
2556
2557 bool repeat() {
2558 return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2559 }
2560 };
2561
2562
2563 // Print stack trace element to resource allocated buffer
2564 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2565 int version, int bci, Symbol* name) {
2566 ResourceMark rm;
2567
2568 // Get strings and string lengths
2569 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2570 const char* klass_name = holder->external_name();
2571 int buf_len = (int)strlen(klass_name);
2572
2573 char* method_name = name->as_C_string();
2574 buf_len += (int)strlen(method_name);
2575
2576 char* source_file_name = nullptr;
2577 Symbol* source = Backtrace::get_source_file_name(holder, version);
2578 if (source != nullptr) {
2579 source_file_name = source->as_C_string();
2580 buf_len += (int)strlen(source_file_name);
2581 }
2582
2583 char *module_name = nullptr, *module_version = nullptr;
2584 ModuleEntry* module = holder->module();
2585 if (module->is_named()) {
2586 module_name = module->name()->as_C_string();
2587 buf_len += (int)strlen(module_name);
2588 if (module->version() != nullptr) {
2589 module_version = module->version()->as_C_string();
2590 buf_len += (int)strlen(module_version);
2591 }
2592 }
2593
2594 // Allocate temporary buffer with extra space for formatting and line number
2595 const size_t buf_size = buf_len + 64;
2596 char* buf = NEW_RESOURCE_ARRAY(char, buf_size);
2597
2598 // Print stack trace line in buffer
2599 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name);
2600
2601 // Print module information
2602 if (module_name != nullptr) {
2603 if (module_version != nullptr) {
2604 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version);
2605 } else {
2606 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name);
2607 }
2608 }
2609
2610 // The method can be null if the requested class version is gone
2611 Method* method = holder->method_with_orig_idnum(method_id, version);
2612 if (!version_matches(method, version)) {
2613 strcat(buf, "Redefined)");
2614 } else {
2615 int line_number = Backtrace::get_line_number(method, bci);
2616 if (line_number == -2) {
2617 strcat(buf, "Native Method)");
2618 } else {
2619 if (source_file_name != nullptr && (line_number != -1)) {
2620 // Sourcename and linenumber
2621 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number);
2622 } else if (source_file_name != nullptr) {
2623 // Just sourcename
2624 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name);
2625 } else {
2626 // Neither sourcename nor linenumber
2627 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)");
2628 }
2629 nmethod* nm = method->code();
2630 if (WizardMode && nm != nullptr) {
2631 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2632 }
2633 }
2634 }
2635
2636 st->print_cr("%s", buf);
2637 }
2638
2639 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2640 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2641 int method_id = method->orig_method_idnum();
2642 int version = method->constants()->version();
2643 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2644 }
2645
2646 /**
2647 * Print the throwable message and its stack trace plus all causes by walking the
2648 * cause chain. The output looks the same as of Throwable.printStackTrace().
2649 */
2650 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2651 // First, print the message.
2652 print(throwable(), st);
2653 st->cr();
2654
2655 // Now print the stack trace.
2656 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2657 while (throwable.not_null()) {
2658 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2659 if (result.is_null()) {
2660 st->print_raw_cr("\t<<no stack trace available>>");
2661 return;
2662 }
2663 BacktraceIterator iter(result, THREAD);
2664
2665 while (iter.repeat()) {
2666 BacktraceElement bte = iter.next(THREAD);
2667 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2668 }
2669 if (THREAD->can_call_java()) {
2670 // Call getCause() which doesn't necessarily return the _cause field.
2671 ExceptionMark em(THREAD);
2672 JavaValue cause(T_OBJECT);
2673 JavaCalls::call_virtual(&cause,
2674 throwable,
2675 throwable->klass(),
2676 vmSymbols::getCause_name(),
2677 vmSymbols::void_throwable_signature(),
2678 THREAD);
2679 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2680 if (HAS_PENDING_EXCEPTION) {
2681 CLEAR_PENDING_EXCEPTION;
2682 throwable = Handle();
2683 } else {
2684 throwable = Handle(THREAD, cause.get_oop());
2685 if (throwable.not_null()) {
2686 st->print("Caused by: ");
2687 print(throwable(), st);
2688 st->cr();
2689 }
2690 }
2691 } else {
2692 st->print_raw_cr("<<cannot call Java to get cause>>");
2693 return;
2694 }
2695 }
2696 }
2697
2698 /**
2699 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2700 */
2701 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2702 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2703 JavaValue result(T_VOID);
2704 JavaCalls::call_virtual(&result,
2705 throwable,
2706 vmClasses::Throwable_klass(),
2707 vmSymbols::printStackTrace_name(),
2708 vmSymbols::void_method_signature(),
2709 THREAD);
2710 }
2711
2712 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2713 if (!StackTraceInThrowable) return;
2714 ResourceMark rm(THREAD);
2715
2716 // Start out by clearing the backtrace for this object, in case the VM
2717 // runs out of memory while allocating the stack trace
2718 set_backtrace(throwable(), nullptr);
2719 // Clear lazily constructed Java level stacktrace if refilling occurs
2720 // This is unnecessary in 1.7+ but harmless
2721 clear_stacktrace(throwable());
2722
2723 int max_depth = MaxJavaStackTraceDepth;
2724 JavaThread* thread = THREAD;
2725
2726 BacktraceBuilder bt(CHECK);
2727
2728 // If there is no Java frame just return the method that was being called
2729 // with bci 0
2730 if (!thread->has_last_Java_frame()) {
2731 if (max_depth >= 1 && method() != nullptr) {
2732 bt.push(method(), 0, CHECK);
2733 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2734 set_depth(throwable(), 1);
2735 set_backtrace(throwable(), bt.backtrace());
2736 }
2737 return;
2738 }
2739
2740 // Instead of using vframe directly, this version of fill_in_stack_trace
2741 // basically handles everything by hand. This significantly improved the
2742 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2743 // See bug 6333838 for more details.
2744 // The "ASSERT" here is to verify this method generates the exactly same stack
2745 // trace as utilizing vframe.
2746 #ifdef ASSERT
2747 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2748 #endif
2749 int total_count = 0;
2750 RegisterMap map(thread,
2751 RegisterMap::UpdateMap::skip,
2752 RegisterMap::ProcessFrames::skip,
2753 RegisterMap::WalkContinuation::include);
2754 int decode_offset = 0;
2755 nmethod* nm = nullptr;
2756 bool skip_fillInStackTrace_check = false;
2757 bool skip_throwableInit_check = false;
2758 bool skip_hidden = !ShowHiddenFrames;
2759 bool show_carrier = ShowCarrierFrames;
2760 ContinuationEntry* cont_entry = thread->last_continuation();
2761 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2762 Method* method = nullptr;
2763 int bci = 0;
2764
2765 // Compiled java method case.
2766 if (decode_offset != 0) {
2767 DebugInfoReadStream stream(nm, decode_offset);
2768 decode_offset = stream.read_int();
2769 method = (Method*)nm->metadata_at(stream.read_int());
2770 bci = stream.read_bci();
2771 } else {
2772 if (fr.is_first_frame()) break;
2773
2774 if (Continuation::is_continuation_enterSpecial(fr)) {
2775 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2776 if (!show_carrier && cont_entry->is_virtual_thread()) {
2777 break;
2778 }
2779 cont_entry = cont_entry->parent();
2780 }
2781
2782 address pc = fr.pc();
2783 if (fr.is_interpreted_frame()) {
2784 address bcp;
2785 if (!map.in_cont()) {
2786 bcp = fr.interpreter_frame_bcp();
2787 method = fr.interpreter_frame_method();
2788 } else {
2789 bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2790 method = map.stack_chunk()->interpreter_frame_method(fr);
2791 }
2792 bci = method->bci_from(bcp);
2793 fr = fr.sender(&map);
2794 } else {
2795 CodeBlob* cb = fr.cb();
2796 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2797 // but non nmethod
2798 fr = fr.sender(&map);
2799 if (cb == nullptr || !cb->is_nmethod()) {
2800 continue;
2801 }
2802 nm = cb->as_nmethod();
2803 assert(nm->method() != nullptr, "must be");
2804 if (nm->method()->is_native()) {
2805 method = nm->method();
2806 bci = 0;
2807 } else {
2808 PcDesc* pd = nm->pc_desc_at(pc);
2809 decode_offset = pd->scope_decode_offset();
2810 // if decode_offset is not equal to 0, it will execute the
2811 // "compiled java method case" at the beginning of the loop.
2812 continue;
2813 }
2814 }
2815 }
2816 #ifdef ASSERT
2817 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2818 assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2819 st.next();
2820 }
2821 #endif
2822
2823 // the format of the stacktrace will be:
2824 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2825 // - 0 or more <init> methods for the exception class (skipped)
2826 // - rest of the stack
2827
2828 if (!skip_fillInStackTrace_check) {
2829 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2830 throwable->is_a(method->method_holder())) {
2831 continue;
2832 }
2833 else {
2834 skip_fillInStackTrace_check = true; // gone past them all
2835 }
2836 }
2837 if (!skip_throwableInit_check) {
2838 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2839
2840 // skip <init> methods of the exception class and superclasses
2841 // This is similar to classic VM.
2842 if (method->name() == vmSymbols::object_initializer_name() &&
2843 throwable->is_a(method->method_holder())) {
2844 continue;
2845 } else {
2846 // there are none or we've seen them all - either way stop checking
2847 skip_throwableInit_check = true;
2848 }
2849 }
2850 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2851 if (skip_hidden) {
2852 if (total_count == 0) {
2853 // The top frame will be hidden from the stack trace.
2854 bt.set_has_hidden_top_frame();
2855 }
2856 continue;
2857 }
2858 }
2859
2860 bt.push(method, bci, CHECK);
2861 total_count++;
2862 }
2863
2864 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2865
2866 // Put completed stack trace into throwable object
2867 set_backtrace(throwable(), bt.backtrace());
2868 set_depth(throwable(), total_count);
2869 }
2870
2871 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2872 // No-op if stack trace is disabled
2873 if (!StackTraceInThrowable) {
2874 return;
2875 }
2876
2877 // Disable stack traces for some preallocated out of memory errors
2878 if (!Universe::should_fill_in_stack_trace(throwable)) {
2879 return;
2880 }
2881
2882 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2883 PreserveExceptionMark pm(THREAD);
2884
2885 fill_in_stack_trace(throwable, method, THREAD);
2886 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2887 // original exception via the PreserveExceptionMark destructor.
2888 CLEAR_PENDING_EXCEPTION;
2889 }
2890
2891 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2892 // Allocate stack trace - backtrace is created but not filled in
2893
2894 // No-op if stack trace is disabled
2895 if (!StackTraceInThrowable) return;
2896 BacktraceBuilder bt(CHECK); // creates a backtrace
2897 set_backtrace(throwable(), bt.backtrace());
2898 }
2899
2900
2901 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2902 // Fill in stack trace into preallocated backtrace (no GC)
2903
2904 // No-op if stack trace is disabled
2905 if (!StackTraceInThrowable) return;
2906
2907 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2908
2909 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2910
2911 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2912 assert(backtrace.not_null(), "backtrace should have been preallocated");
2913
2914 ResourceMark rm(THREAD);
2915 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2916
2917 BacktraceBuilder bt(THREAD, backtrace);
2918
2919 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2920 // methods as preallocated errors aren't created by "java" code.
2921
2922 // fill in as much stack trace as possible
2923 int chunk_count = 0;
2924 for (;!st.at_end(); st.next()) {
2925 bt.push(st.method(), st.bci(), CHECK);
2926 chunk_count++;
2927
2928 // Bail-out for deep stacks
2929 if (chunk_count >= trace_chunk_size) break;
2930 }
2931 set_depth(throwable(), chunk_count);
2932 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2933
2934 // We support the Throwable immutability protocol defined for Java 7.
2935 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2936 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2937 }
2938
2939 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2940 objArrayHandle stack_trace_array_h, TRAPS) {
2941
2942 if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2943 THROW(vmSymbols::java_lang_NullPointerException());
2944 }
2945
2946 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2947
2948 if (stack_trace_array_h->length() != depth) {
2949 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2950 }
2951
2952 objArrayHandle result(THREAD, objArrayOop(backtrace()));
2953 BacktraceIterator iter(result, THREAD);
2954
2955 int index = 0;
2956 while (iter.repeat()) {
2957 BacktraceElement bte = iter.next(THREAD);
2958
2959 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2960
2961 if (stack_trace_element.is_null()) {
2962 THROW(vmSymbols::java_lang_NullPointerException());
2963 }
2964
2965 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2966 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2967
2968 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2969 method,
2970 bte._version,
2971 bte._bci,
2972 bte._name,
2973 CHECK);
2974 }
2975 }
2976
2977 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
2978 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
2979 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
2980 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
2981 // symbolic stacktrace of 'throwable'.
2982 assert(throwable.not_null(), "shouldn't be");
2983
2984 // Now create the message from the original exception and thread name.
2985 ResourceMark rm(current);
2986 const char *message = nullptr;
2987 oop detailed_message = java_lang_Throwable::message(throwable());
2988 if (detailed_message != nullptr) {
2989 message = java_lang_String::as_utf8_string(detailed_message);
2990 }
2991 stringStream st;
2992 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
2993 message == nullptr ? "" : ":");
2994 if (message == nullptr) {
2995 st.print("[in thread \"%s\"]", current->name());
2996 } else {
2997 st.print("%s [in thread \"%s\"]", message, current->name());
2998 }
2999
3000 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
3001 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
3002 // If new_exception returns a different exception while creating the exception,
3003 // abandon the attempt to save the initialization error and return null.
3004 if (init_error->klass()->name() != exception_name) {
3005 log_info(class, init)("Exception %s thrown while saving initialization exception",
3006 init_error->klass()->external_name());
3007 return Handle();
3008 }
3009
3010 // Call to java to fill in the stack trace and clear declaringClassObject to
3011 // not keep classes alive in the stack trace.
3012 // call this: public StackTraceElement[] getStackTrace()
3013 JavaValue result(T_ARRAY);
3014 JavaCalls::call_virtual(&result, throwable,
3015 vmClasses::Throwable_klass(),
3016 vmSymbols::getStackTrace_name(),
3017 vmSymbols::getStackTrace_signature(),
3018 current);
3019 if (!current->has_pending_exception()){
3020 Handle stack_trace(current, result.get_oop());
3021 assert(stack_trace->is_objArray(), "Should be an array");
3022 java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
3023 // Clear backtrace because the stacktrace should be used instead.
3024 set_backtrace(init_error(), nullptr);
3025 } else {
3026 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
3027 init_error->klass()->external_name());
3028 current->clear_pending_exception();
3029 }
3030
3031 return init_error;
3032 }
3033
3034 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
3035 JavaThread* current = JavaThread::current();
3036 objArrayHandle result(current, objArrayOop(backtrace(throwable)));
3037 BacktraceIterator iter(result, current);
3038 // No backtrace available.
3039 if (!iter.repeat()) return false;
3040
3041 // If the exception happened in a frame that has been hidden, i.e.,
3042 // omitted from the back trace, we can not compute the message.
3043 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
3044 if (hidden != nullptr) {
3045 return false;
3046 }
3047
3048 // Get first backtrace element.
3049 BacktraceElement bte = iter.next(current);
3050
3051 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
3052 assert(holder != nullptr, "first element should be non-null");
3053 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
3054
3055 // Original version is no longer available.
3056 if (m == nullptr || !version_matches(m, bte._version)) {
3057 return false;
3058 }
3059
3060 *method = m;
3061 *bci = bte._bci;
3062 return true;
3063 }
3064
3065 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
3066 // Allocate java.lang.StackTraceElement instance
3067 InstanceKlass* k = vmClasses::StackTraceElement_klass();
3068 assert(k != nullptr, "must be loaded in 1.4+");
3069 if (k->should_be_initialized()) {
3070 k->initialize(CHECK_NULL);
3071 }
3072
3073 Handle element = k->allocate_instance_handle(CHECK_NULL);
3074
3075 int version = method->constants()->version();
3076 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
3077 return element();
3078 }
3079
3080 void java_lang_StackTraceElement::fill_in(Handle element,
3081 InstanceKlass* holder, const methodHandle& method,
3082 int version, int bci, Symbol* name, TRAPS) {
3083 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
3084
3085 ResourceMark rm(THREAD);
3086 HandleMark hm(THREAD);
3087
3088 // Fill in class name
3089 Handle java_class(THREAD, holder->java_mirror());
3090 oop classname = java_lang_Class::name(java_class, CHECK);
3091 java_lang_StackTraceElement::set_declaringClass(element(), classname);
3092 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
3093
3094 oop loader = holder->class_loader();
3095 if (loader != nullptr) {
3096 oop loader_name = java_lang_ClassLoader::name(loader);
3097 if (loader_name != nullptr)
3098 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
3099 }
3100
3101 // Fill in method name
3102 oop methodname = StringTable::intern(name, CHECK);
3103 java_lang_StackTraceElement::set_methodName(element(), methodname);
3104
3105 // Fill in module name and version
3106 ModuleEntry* module = holder->module();
3107 if (module->is_named()) {
3108 oop module_name = StringTable::intern(module->name(), CHECK);
3109 java_lang_StackTraceElement::set_moduleName(element(), module_name);
3110 oop module_version;
3111 if (module->version() != nullptr) {
3112 module_version = StringTable::intern(module->version(), CHECK);
3113 } else {
3114 module_version = nullptr;
3115 }
3116 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
3117 }
3118
3119 if (method() == nullptr || !version_matches(method(), version)) {
3120 // The method was redefined, accurate line number information isn't available
3121 java_lang_StackTraceElement::set_fileName(element(), nullptr);
3122 java_lang_StackTraceElement::set_lineNumber(element(), -1);
3123 } else {
3124 Symbol* source;
3125 oop source_file;
3126 int line_number;
3127 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
3128
3129 java_lang_StackTraceElement::set_fileName(element(), source_file);
3130 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
3131 }
3132 }
3133
3134 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
3135 InstanceKlass* holder,
3136 int version,
3137 const methodHandle& method,
3138 int bci,
3139 Symbol*& source,
3140 oop& source_file,
3141 int& line_number, TRAPS) {
3142 // Fill in source file name and line number.
3143 source = Backtrace::get_source_file_name(holder, version);
3144 source_file = java_lang_Class::source_file(java_class());
3145 if (source != nullptr) {
3146 // Class was not redefined. We can trust its cache if set,
3147 // else we have to initialize it.
3148 if (source_file == nullptr) {
3149 source_file = StringTable::intern(source, CHECK);
3150 java_lang_Class::set_source_file(java_class(), source_file);
3151 }
3152 } else {
3153 // Class was redefined. Dump the cache if it was set.
3154 if (source_file != nullptr) {
3155 source_file = nullptr;
3156 java_lang_Class::set_source_file(java_class(), source_file);
3157 }
3158 }
3159 line_number = Backtrace::get_line_number(method(), bci);
3160 }
3161
3162 #if INCLUDE_JVMCI
3163 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
3164 Symbol*& filename, int& line_number, TRAPS) {
3165 ResourceMark rm(THREAD);
3166 HandleMark hm(THREAD);
3167
3168 filename = nullptr;
3169 line_number = -1;
3170
3171 oop source_file;
3172 int version = method->constants()->version();
3173 InstanceKlass* holder = method->method_holder();
3174 Handle java_class(THREAD, holder->java_mirror());
3175 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
3176 }
3177 #endif // INCLUDE_JVMCI
3178
3179 // java_lang_ClassFrameInfo
3180
3181 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
3182 int java_lang_ClassFrameInfo::_flags_offset;
3183
3184 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
3185 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \
3186 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false)
3187
3188 void java_lang_ClassFrameInfo::compute_offsets() {
3189 InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
3190 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3191 }
3192
3193 #if INCLUDE_CDS
3194 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
3195 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3196 }
3197 #endif
3198
3199 static int get_flags(const methodHandle& m) {
3200 int flags = m->access_flags().as_method_flags();
3201 if (m->is_object_initializer()) {
3202 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR;
3203 } else {
3204 // Note: Static initializers can be here. Record them as plain methods.
3205 flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
3206 }
3207 if (m->caller_sensitive()) {
3208 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
3209 }
3210 if (m->is_hidden()) {
3211 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3212 }
3213 assert((flags & 0xFF000000) == 0, "unexpected flags");
3214 return flags;
3215 }
3216
3217 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3218 return obj->obj_field(_classOrMemberName_offset);
3219 }
3220
3221 int java_lang_ClassFrameInfo::flags(oop obj) {
3222 return obj->int_field(_flags_offset);
3223 }
3224
3225 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3226 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3227 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3228 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3229 stackFrame->int_field_put(_flags_offset, flags);
3230 }
3231
3232 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3233 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3234 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3235 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3236 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3237 stackFrame->int_field_put(_flags_offset, flags);
3238 }
3239
3240
3241 // java_lang_StackFrameInfo
3242
3243 int java_lang_StackFrameInfo::_type_offset;
3244 int java_lang_StackFrameInfo::_name_offset;
3245 int java_lang_StackFrameInfo::_bci_offset;
3246 int java_lang_StackFrameInfo::_version_offset;
3247 int java_lang_StackFrameInfo::_contScope_offset;
3248
3249 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3250 macro(_type_offset, k, "type", object_signature, false); \
3251 macro(_name_offset, k, "name", string_signature, false); \
3252 macro(_bci_offset, k, "bci", int_signature, false); \
3253 macro(_contScope_offset, k, "contScope", continuationscope_signature, false)
3254
3255 void java_lang_StackFrameInfo::compute_offsets() {
3256 InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3257 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3258 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3259 }
3260
3261 #if INCLUDE_CDS
3262 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3263 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3264 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3265 }
3266 #endif
3267
3268 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3269 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3270 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3271 return method;
3272 }
3273
3274 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3275 // set Method* or mid/cpref
3276 HandleMark hm(THREAD);
3277 Handle cont_h(THREAD, cont);
3278 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3279
3280 // set bci
3281 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3282 // method may be redefined; store the version
3283 int version = method->constants()->version();
3284 assert((jushort)version == version, "version should be short");
3285 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3286
3287 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3288 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3289 }
3290
3291 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3292 ResourceMark rm(THREAD);
3293 HandleMark hm(THREAD);
3294
3295 Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3296 InstanceKlass* holder = method->method_holder();
3297 short version = stackFrame->short_field(_version_offset);
3298 int bci = stackFrame->int_field(_bci_offset);
3299 Symbol* name = method->name();
3300 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3301 }
3302
3303 oop java_lang_StackFrameInfo::type(oop obj) {
3304 return obj->obj_field(_type_offset);
3305 }
3306
3307 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3308 obj->obj_field_put(_type_offset, value);
3309 }
3310
3311 oop java_lang_StackFrameInfo::name(oop obj) {
3312 return obj->obj_field(_name_offset);
3313 }
3314
3315 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3316 obj->obj_field_put(_name_offset, value);
3317 }
3318
3319 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3320 obj->short_field_put(_version_offset, value);
3321 }
3322
3323 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3324 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3325 obj->int_field_put(_bci_offset, value);
3326 }
3327
3328 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3329 obj->obj_field_put(_contScope_offset, value);
3330 }
3331
3332 int java_lang_LiveStackFrameInfo::_monitors_offset;
3333 int java_lang_LiveStackFrameInfo::_locals_offset;
3334 int java_lang_LiveStackFrameInfo::_operands_offset;
3335 int java_lang_LiveStackFrameInfo::_mode_offset;
3336
3337 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3338 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
3339 macro(_locals_offset, k, "locals", object_array_signature, false); \
3340 macro(_operands_offset, k, "operands", object_array_signature, false); \
3341 macro(_mode_offset, k, "mode", int_signature, false)
3342
3343 void java_lang_LiveStackFrameInfo::compute_offsets() {
3344 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3345 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3346 }
3347
3348 #if INCLUDE_CDS
3349 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3350 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3351 }
3352 #endif
3353
3354 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3355 obj->obj_field_put(_monitors_offset, value);
3356 }
3357
3358 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3359 obj->obj_field_put(_locals_offset, value);
3360 }
3361
3362 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3363 obj->obj_field_put(_operands_offset, value);
3364 }
3365
3366 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3367 obj->int_field_put(_mode_offset, value);
3368 }
3369
3370
3371 // java_lang_AccessibleObject
3372
3373 int java_lang_reflect_AccessibleObject::_override_offset;
3374
3375 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3376 macro(_override_offset, k, "override", bool_signature, false)
3377
3378 void java_lang_reflect_AccessibleObject::compute_offsets() {
3379 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3380 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3381 }
3382
3383 #if INCLUDE_CDS
3384 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3385 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3386 }
3387 #endif
3388
3389 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3390 return (jboolean) reflect->bool_field(_override_offset);
3391 }
3392
3393 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3394 reflect->bool_field_put(_override_offset, (int) value);
3395 }
3396
3397 // java_lang_reflect_Method
3398
3399 int java_lang_reflect_Method::_clazz_offset;
3400 int java_lang_reflect_Method::_name_offset;
3401 int java_lang_reflect_Method::_returnType_offset;
3402 int java_lang_reflect_Method::_parameterTypes_offset;
3403 int java_lang_reflect_Method::_exceptionTypes_offset;
3404 int java_lang_reflect_Method::_slot_offset;
3405 int java_lang_reflect_Method::_modifiers_offset;
3406 int java_lang_reflect_Method::_signature_offset;
3407 int java_lang_reflect_Method::_annotations_offset;
3408 int java_lang_reflect_Method::_parameter_annotations_offset;
3409 int java_lang_reflect_Method::_annotation_default_offset;
3410
3411 #define METHOD_FIELDS_DO(macro) \
3412 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3413 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3414 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
3415 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3416 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3417 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3418 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3419 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3420 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3421 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3422 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
3423
3424 void java_lang_reflect_Method::compute_offsets() {
3425 InstanceKlass* k = vmClasses::reflect_Method_klass();
3426 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3427 }
3428
3429 #if INCLUDE_CDS
3430 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3431 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3432 }
3433 #endif
3434
3435 Handle java_lang_reflect_Method::create(TRAPS) {
3436 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3437 Klass* klass = vmClasses::reflect_Method_klass();
3438 // This class is eagerly initialized during VM initialization, since we keep a reference
3439 // to one of the methods
3440 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
3441 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
3442 }
3443
3444 oop java_lang_reflect_Method::clazz(oop reflect) {
3445 return reflect->obj_field(_clazz_offset);
3446 }
3447
3448 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3449 reflect->obj_field_put(_clazz_offset, value);
3450 }
3451
3452 int java_lang_reflect_Method::slot(oop reflect) {
3453 return reflect->int_field(_slot_offset);
3454 }
3455
3456 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3457 reflect->int_field_put(_slot_offset, value);
3458 }
3459
3460 void java_lang_reflect_Method::set_name(oop method, oop value) {
3461 method->obj_field_put(_name_offset, value);
3462 }
3463
3464 oop java_lang_reflect_Method::return_type(oop method) {
3465 return method->obj_field(_returnType_offset);
3466 }
3467
3468 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3469 method->obj_field_put(_returnType_offset, value);
3470 }
3471
3472 oop java_lang_reflect_Method::parameter_types(oop method) {
3473 return method->obj_field(_parameterTypes_offset);
3474 }
3475
3476 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3477 method->obj_field_put(_parameterTypes_offset, value);
3478 }
3479
3480 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3481 method->obj_field_put(_exceptionTypes_offset, value);
3482 }
3483
3484 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3485 method->int_field_put(_modifiers_offset, value);
3486 }
3487
3488 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3489 method->obj_field_put(_signature_offset, value);
3490 }
3491
3492 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3493 method->obj_field_put(_annotations_offset, value);
3494 }
3495
3496 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3497 method->obj_field_put(_parameter_annotations_offset, value);
3498 }
3499
3500 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3501 method->obj_field_put(_annotation_default_offset, value);
3502 }
3503
3504 int java_lang_reflect_Constructor::_clazz_offset;
3505 int java_lang_reflect_Constructor::_parameterTypes_offset;
3506 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3507 int java_lang_reflect_Constructor::_slot_offset;
3508 int java_lang_reflect_Constructor::_modifiers_offset;
3509 int java_lang_reflect_Constructor::_signature_offset;
3510 int java_lang_reflect_Constructor::_annotations_offset;
3511 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3512
3513 #define CONSTRUCTOR_FIELDS_DO(macro) \
3514 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3515 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3516 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3517 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3518 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3519 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3520 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3521 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3522
3523 void java_lang_reflect_Constructor::compute_offsets() {
3524 InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3525 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3526 }
3527
3528 #if INCLUDE_CDS
3529 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3530 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3531 }
3532 #endif
3533
3534 Handle java_lang_reflect_Constructor::create(TRAPS) {
3535 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3536 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3537 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3538 InstanceKlass* ik = InstanceKlass::cast(k);
3539 // Ensure it is initialized
3540 ik->initialize(CHECK_NH);
3541 return ik->allocate_instance_handle(THREAD);
3542 }
3543
3544 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3545 return reflect->obj_field(_clazz_offset);
3546 }
3547
3548 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3549 reflect->obj_field_put(_clazz_offset, value);
3550 }
3551
3552 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3553 return constructor->obj_field(_parameterTypes_offset);
3554 }
3555
3556 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3557 constructor->obj_field_put(_parameterTypes_offset, value);
3558 }
3559
3560 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3561 constructor->obj_field_put(_exceptionTypes_offset, value);
3562 }
3563
3564 int java_lang_reflect_Constructor::slot(oop reflect) {
3565 return reflect->int_field(_slot_offset);
3566 }
3567
3568 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3569 reflect->int_field_put(_slot_offset, value);
3570 }
3571
3572 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3573 constructor->int_field_put(_modifiers_offset, value);
3574 }
3575
3576 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3577 constructor->obj_field_put(_signature_offset, value);
3578 }
3579
3580 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3581 constructor->obj_field_put(_annotations_offset, value);
3582 }
3583
3584 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3585 method->obj_field_put(_parameter_annotations_offset, value);
3586 }
3587
3588 int java_lang_reflect_Field::_clazz_offset;
3589 int java_lang_reflect_Field::_name_offset;
3590 int java_lang_reflect_Field::_type_offset;
3591 int java_lang_reflect_Field::_slot_offset;
3592 int java_lang_reflect_Field::_modifiers_offset;
3593 int java_lang_reflect_Field::_trusted_final_offset;
3594 int java_lang_reflect_Field::_signature_offset;
3595 int java_lang_reflect_Field::_annotations_offset;
3596
3597 #define FIELD_FIELDS_DO(macro) \
3598 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3599 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3600 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \
3601 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3602 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3603 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \
3604 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3605 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3606
3607 void java_lang_reflect_Field::compute_offsets() {
3608 InstanceKlass* k = vmClasses::reflect_Field_klass();
3609 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3610 }
3611
3612 #if INCLUDE_CDS
3613 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3614 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3615 }
3616 #endif
3617
3618 Handle java_lang_reflect_Field::create(TRAPS) {
3619 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3620 Symbol* name = vmSymbols::java_lang_reflect_Field();
3621 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3622 InstanceKlass* ik = InstanceKlass::cast(k);
3623 // Ensure it is initialized
3624 ik->initialize(CHECK_NH);
3625 return ik->allocate_instance_handle(THREAD);
3626 }
3627
3628 oop java_lang_reflect_Field::clazz(oop reflect) {
3629 return reflect->obj_field(_clazz_offset);
3630 }
3631
3632 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3633 reflect->obj_field_put(_clazz_offset, value);
3634 }
3635
3636 oop java_lang_reflect_Field::name(oop field) {
3637 return field->obj_field(_name_offset);
3638 }
3639
3640 void java_lang_reflect_Field::set_name(oop field, oop value) {
3641 field->obj_field_put(_name_offset, value);
3642 }
3643
3644 oop java_lang_reflect_Field::type(oop field) {
3645 return field->obj_field(_type_offset);
3646 }
3647
3648 void java_lang_reflect_Field::set_type(oop field, oop value) {
3649 field->obj_field_put(_type_offset, value);
3650 }
3651
3652 int java_lang_reflect_Field::slot(oop reflect) {
3653 return reflect->int_field(_slot_offset);
3654 }
3655
3656 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3657 reflect->int_field_put(_slot_offset, value);
3658 }
3659
3660 int java_lang_reflect_Field::modifiers(oop field) {
3661 return field->int_field(_modifiers_offset);
3662 }
3663
3664 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3665 field->int_field_put(_modifiers_offset, value);
3666 }
3667
3668 void java_lang_reflect_Field::set_trusted_final(oop field) {
3669 field->bool_field_put(_trusted_final_offset, true);
3670 }
3671
3672 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3673 field->obj_field_put(_signature_offset, value);
3674 }
3675
3676 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3677 field->obj_field_put(_annotations_offset, value);
3678 }
3679
3680 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3681 // Allocate java.lang.reflect.RecordComponent instance
3682 HandleMark hm(THREAD);
3683 InstanceKlass* ik = vmClasses::RecordComponent_klass();
3684 assert(ik != nullptr, "must be loaded");
3685 ik->initialize(CHECK_NULL);
3686
3687 Handle element = ik->allocate_instance_handle(CHECK_NULL);
3688
3689 Handle decl_class(THREAD, holder->java_mirror());
3690 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3691
3692 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3693 oop component_name = StringTable::intern(name, CHECK_NULL);
3694 java_lang_reflect_RecordComponent::set_name(element(), component_name);
3695
3696 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3697 Handle component_type_h =
3698 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3699 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3700
3701 Method* accessor_method = nullptr;
3702 {
3703 // Prepend "()" to type to create the full method signature.
3704 ResourceMark rm(THREAD);
3705 int sig_len = type->utf8_length() + 3; // "()" and null char
3706 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3707 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3708 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3709 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3710 }
3711
3712 if (accessor_method != nullptr) {
3713 methodHandle method(THREAD, accessor_method);
3714 oop m = Reflection::new_method(method, false, CHECK_NULL);
3715 java_lang_reflect_RecordComponent::set_accessor(element(), m);
3716 } else {
3717 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3718 }
3719
3720 int sig_index = component->generic_signature_index();
3721 if (sig_index > 0) {
3722 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3723 oop component_sig = StringTable::intern(sig, CHECK_NULL);
3724 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3725 } else {
3726 java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3727 }
3728
3729 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3730 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3731
3732 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3733 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3734
3735 return element();
3736 }
3737
3738 int reflect_ConstantPool::_oop_offset;
3739
3740 #define CONSTANTPOOL_FIELDS_DO(macro) \
3741 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3742
3743 void reflect_ConstantPool::compute_offsets() {
3744 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3745 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3746 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3747 }
3748
3749 #if INCLUDE_CDS
3750 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3751 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3752 }
3753 #endif
3754
3755 int java_lang_reflect_Parameter::_name_offset;
3756 int java_lang_reflect_Parameter::_modifiers_offset;
3757 int java_lang_reflect_Parameter::_index_offset;
3758 int java_lang_reflect_Parameter::_executable_offset;
3759
3760 #define PARAMETER_FIELDS_DO(macro) \
3761 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3762 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3763 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \
3764 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3765
3766 void java_lang_reflect_Parameter::compute_offsets() {
3767 InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3768 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3769 }
3770
3771 #if INCLUDE_CDS
3772 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3773 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3774 }
3775 #endif
3776
3777 Handle java_lang_reflect_Parameter::create(TRAPS) {
3778 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3779 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3780 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3781 InstanceKlass* ik = InstanceKlass::cast(k);
3782 // Ensure it is initialized
3783 ik->initialize(CHECK_NH);
3784 return ik->allocate_instance_handle(THREAD);
3785 }
3786
3787 oop java_lang_reflect_Parameter::name(oop param) {
3788 return param->obj_field(_name_offset);
3789 }
3790
3791 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3792 param->obj_field_put(_name_offset, value);
3793 }
3794
3795 int java_lang_reflect_Parameter::modifiers(oop param) {
3796 return param->int_field(_modifiers_offset);
3797 }
3798
3799 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3800 param->int_field_put(_modifiers_offset, value);
3801 }
3802
3803 int java_lang_reflect_Parameter::index(oop param) {
3804 return param->int_field(_index_offset);
3805 }
3806
3807 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3808 param->int_field_put(_index_offset, value);
3809 }
3810
3811 oop java_lang_reflect_Parameter::executable(oop param) {
3812 return param->obj_field(_executable_offset);
3813 }
3814
3815 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3816 param->obj_field_put(_executable_offset, value);
3817 }
3818
3819 // java_lang_Module
3820
3821 int java_lang_Module::_loader_offset;
3822 int java_lang_Module::_name_offset;
3823 int java_lang_Module::_module_entry_offset;
3824
3825 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3826 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3827 return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3828 vmSymbols::java_lang_module_init_signature(),
3829 loader, module_name, CHECK_NH);
3830 }
3831
3832 #define MODULE_FIELDS_DO(macro) \
3833 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3834 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false)
3835
3836 void java_lang_Module::compute_offsets() {
3837 InstanceKlass* k = vmClasses::Module_klass();
3838 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3839 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3840 }
3841
3842 #if INCLUDE_CDS
3843 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3844 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3845 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3846 }
3847 #endif
3848
3849 oop java_lang_Module::loader(oop module) {
3850 return module->obj_field(_loader_offset);
3851 }
3852
3853 void java_lang_Module::set_loader(oop module, oop value) {
3854 module->obj_field_put(_loader_offset, value);
3855 }
3856
3857 oop java_lang_Module::name(oop module) {
3858 return module->obj_field(_name_offset);
3859 }
3860
3861 void java_lang_Module::set_name(oop module, oop value) {
3862 module->obj_field_put(_name_offset, value);
3863 }
3864
3865 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3866 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3867 assert(module != nullptr, "module can't be null");
3868 assert(oopDesc::is_oop(module), "module must be oop");
3869
3870 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3871 return module_entry;
3872 }
3873
3874 ModuleEntry* java_lang_Module::module_entry(oop module) {
3875 ModuleEntry* module_entry = module_entry_raw(module);
3876 if (module_entry == nullptr) {
3877 // If the inject field containing the ModuleEntry* is null then return the
3878 // class loader's unnamed module.
3879 oop loader = java_lang_Module::loader(module);
3880 Handle h_loader = Handle(Thread::current(), loader);
3881 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3882 return loader_cld->unnamed_module();
3883 }
3884 return module_entry;
3885 }
3886
3887 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3888 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3889 assert(module != nullptr, "module can't be null");
3890 assert(oopDesc::is_oop(module), "module must be oop");
3891 module->address_field_put(_module_entry_offset, (address)module_entry);
3892 }
3893
3894 Handle reflect_ConstantPool::create(TRAPS) {
3895 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3896 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3897 // Ensure it is initialized
3898 k->initialize(CHECK_NH);
3899 return k->allocate_instance_handle(THREAD);
3900 }
3901
3902
3903 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3904 oop mirror = value->pool_holder()->java_mirror();
3905 // Save the mirror to get back the constant pool.
3906 reflect->obj_field_put(_oop_offset, mirror);
3907 }
3908
3909 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3910
3911 oop mirror = reflect->obj_field(_oop_offset);
3912 Klass* k = java_lang_Class::as_Klass(mirror);
3913 assert(k->is_instance_klass(), "Must be");
3914
3915 // Get the constant pool back from the klass. Since class redefinition
3916 // merges the new constant pool into the old, this is essentially the
3917 // same constant pool as the original. If constant pool merging is
3918 // no longer done in the future, this will have to change to save
3919 // the original.
3920 return InstanceKlass::cast(k)->constants();
3921 }
3922
3923
3924 // Support for java_lang_ref_Reference
3925
3926 bool java_lang_ref_Reference::_offsets_initialized;
3927
3928 int java_lang_ref_Reference::_referent_offset;
3929 int java_lang_ref_Reference::_queue_offset;
3930 int java_lang_ref_Reference::_next_offset;
3931 int java_lang_ref_Reference::_discovered_offset;
3932
3933 #define REFERENCE_FIELDS_DO(macro) \
3934 macro(_referent_offset, k, "referent", object_signature, false); \
3935 macro(_queue_offset, k, "queue", referencequeue_signature, false); \
3936 macro(_next_offset, k, "next", reference_signature, false); \
3937 macro(_discovered_offset, k, "discovered", reference_signature, false);
3938
3939 void java_lang_ref_Reference::compute_offsets() {
3940 if (_offsets_initialized) {
3941 return;
3942 }
3943 _offsets_initialized = true;
3944 InstanceKlass* k = vmClasses::Reference_klass();
3945 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3946 }
3947
3948 #if INCLUDE_CDS
3949 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3950 f->do_bool(&_offsets_initialized);
3951 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3952 }
3953 #endif
3954
3955 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3956 assert(obj != nullptr, "sanity");
3957 if (offset != _referent_offset) {
3958 return false;
3959 }
3960
3961 Klass* k = obj->klass();
3962 if (!k->is_instance_klass()) {
3963 return false;
3964 }
3965
3966 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3967 bool is_reference = ik->reference_type() != REF_NONE;
3968 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
3969 return is_reference;
3970 }
3971
3972 int java_lang_boxing_object::_value_offset;
3973 int java_lang_boxing_object::_long_value_offset;
3974
3975 #define BOXING_FIELDS_DO(macro) \
3976 macro(_value_offset, integerKlass, "value", int_signature, false); \
3977 macro(_long_value_offset, longKlass, "value", long_signature, false);
3978
3979 void java_lang_boxing_object::compute_offsets() {
3980 InstanceKlass* integerKlass = vmClasses::Integer_klass();
3981 InstanceKlass* longKlass = vmClasses::Long_klass();
3982 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3983 }
3984
3985 #if INCLUDE_CDS
3986 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
3987 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3988 }
3989 #endif
3990
3991 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3992 Klass* k = vmClasses::box_klass(type);
3993 if (k == nullptr) return nullptr;
3994 InstanceKlass* ik = InstanceKlass::cast(k);
3995 if (!ik->is_initialized()) {
3996 ik->initialize(CHECK_NULL);
3997 }
3998 return ik->allocate_instance(THREAD);
3999 }
4000
4001
4002 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
4003 oop box = initialize_and_allocate(type, CHECK_NULL);
4004 if (box == nullptr) return nullptr;
4005 switch (type) {
4006 case T_BOOLEAN:
4007 box->bool_field_put(_value_offset, value->z);
4008 break;
4009 case T_CHAR:
4010 box->char_field_put(_value_offset, value->c);
4011 break;
4012 case T_FLOAT:
4013 box->float_field_put(_value_offset, value->f);
4014 break;
4015 case T_DOUBLE:
4016 box->double_field_put(_long_value_offset, value->d);
4017 break;
4018 case T_BYTE:
4019 box->byte_field_put(_value_offset, value->b);
4020 break;
4021 case T_SHORT:
4022 box->short_field_put(_value_offset, value->s);
4023 break;
4024 case T_INT:
4025 box->int_field_put(_value_offset, value->i);
4026 break;
4027 case T_LONG:
4028 box->long_field_put(_long_value_offset, value->j);
4029 break;
4030 default:
4031 return nullptr;
4032 }
4033 return box;
4034 }
4035
4036
4037 BasicType java_lang_boxing_object::basic_type(oop box) {
4038 if (box == nullptr) return T_ILLEGAL;
4039 BasicType type = vmClasses::box_klass_type(box->klass());
4040 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
4041 return T_ILLEGAL;
4042 return type;
4043 }
4044
4045
4046 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
4047 BasicType type = vmClasses::box_klass_type(box->klass());
4048 switch (type) {
4049 case T_BOOLEAN:
4050 value->z = box->bool_field(_value_offset);
4051 break;
4052 case T_CHAR:
4053 value->c = box->char_field(_value_offset);
4054 break;
4055 case T_FLOAT:
4056 value->f = box->float_field(_value_offset);
4057 break;
4058 case T_DOUBLE:
4059 value->d = box->double_field(_long_value_offset);
4060 break;
4061 case T_BYTE:
4062 value->b = box->byte_field(_value_offset);
4063 break;
4064 case T_SHORT:
4065 value->s = box->short_field(_value_offset);
4066 break;
4067 case T_INT:
4068 value->i = box->int_field(_value_offset);
4069 break;
4070 case T_LONG:
4071 value->j = box->long_field(_long_value_offset);
4072 break;
4073 default:
4074 return T_ILLEGAL;
4075 } // end switch
4076 return type;
4077 }
4078
4079
4080 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
4081 BasicType type = vmClasses::box_klass_type(box->klass());
4082 switch (type) {
4083 case T_BOOLEAN:
4084 box->bool_field_put(_value_offset, value->z);
4085 break;
4086 case T_CHAR:
4087 box->char_field_put(_value_offset, value->c);
4088 break;
4089 case T_FLOAT:
4090 box->float_field_put(_value_offset, value->f);
4091 break;
4092 case T_DOUBLE:
4093 box->double_field_put(_long_value_offset, value->d);
4094 break;
4095 case T_BYTE:
4096 box->byte_field_put(_value_offset, value->b);
4097 break;
4098 case T_SHORT:
4099 box->short_field_put(_value_offset, value->s);
4100 break;
4101 case T_INT:
4102 box->int_field_put(_value_offset, value->i);
4103 break;
4104 case T_LONG:
4105 box->long_field_put(_long_value_offset, value->j);
4106 break;
4107 default:
4108 return T_ILLEGAL;
4109 } // end switch
4110 return type;
4111 }
4112
4113
4114 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
4115 switch (type) {
4116 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
4117 case T_CHAR: st->print("%d", value->c); break;
4118 case T_BYTE: st->print("%d", value->b); break;
4119 case T_SHORT: st->print("%d", value->s); break;
4120 case T_INT: st->print("%d", value->i); break;
4121 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
4122 case T_FLOAT: st->print("%f", value->f); break;
4123 case T_DOUBLE: st->print("%lf", value->d); break;
4124 default: st->print("type %d?", type); break;
4125 }
4126 }
4127
4128
4129 // Support for java_lang_ref_SoftReference
4130 //
4131
4132 int java_lang_ref_SoftReference::_timestamp_offset;
4133 int java_lang_ref_SoftReference::_static_clock_offset;
4134
4135 #define SOFTREFERENCE_FIELDS_DO(macro) \
4136 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
4137 macro(_static_clock_offset, k, "clock", long_signature, true)
4138
4139 void java_lang_ref_SoftReference::compute_offsets() {
4140 InstanceKlass* k = vmClasses::SoftReference_klass();
4141 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4142 }
4143
4144 #if INCLUDE_CDS
4145 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
4146 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4147 }
4148 #endif
4149
4150 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
4151 return ref->long_field(_timestamp_offset);
4152 }
4153
4154 jlong java_lang_ref_SoftReference::clock() {
4155 InstanceKlass* ik = vmClasses::SoftReference_klass();
4156 oop base = ik->static_field_base_raw();
4157 return base->long_field(_static_clock_offset);
4158 }
4159
4160 void java_lang_ref_SoftReference::set_clock(jlong value) {
4161 InstanceKlass* ik = vmClasses::SoftReference_klass();
4162 oop base = ik->static_field_base_raw();
4163 base->long_field_put(_static_clock_offset, value);
4164 }
4165
4166 // Support for java_lang_invoke_DirectMethodHandle
4167
4168 int java_lang_invoke_DirectMethodHandle::_member_offset;
4169
4170 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
4171 oop member_name = nullptr;
4172 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
4173 "a DirectMethodHandle oop is expected");
4174 return dmh->obj_field(_member_offset);
4175 }
4176
4177 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
4178 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
4179
4180 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
4181 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
4182 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4183 }
4184
4185 #if INCLUDE_CDS
4186 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
4187 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4188 }
4189 #endif
4190
4191 // Support for java_lang_invoke_MethodHandle
4192
4193 int java_lang_invoke_MethodHandle::_type_offset;
4194 int java_lang_invoke_MethodHandle::_form_offset;
4195
4196 int java_lang_invoke_MemberName::_clazz_offset;
4197 int java_lang_invoke_MemberName::_name_offset;
4198 int java_lang_invoke_MemberName::_type_offset;
4199 int java_lang_invoke_MemberName::_flags_offset;
4200 int java_lang_invoke_MemberName::_method_offset;
4201 int java_lang_invoke_MemberName::_vmindex_offset;
4202
4203 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
4204 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
4205
4206 int java_lang_invoke_LambdaForm::_vmentry_offset;
4207
4208 #define METHODHANDLE_FIELDS_DO(macro) \
4209 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4210 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
4211
4212 void java_lang_invoke_MethodHandle::compute_offsets() {
4213 InstanceKlass* k = vmClasses::MethodHandle_klass();
4214 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4215 }
4216
4217 #if INCLUDE_CDS
4218 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4219 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4220 }
4221 #endif
4222
4223 #define MEMBERNAME_FIELDS_DO(macro) \
4224 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4225 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4226 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
4227 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
4228 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
4229
4230 void java_lang_invoke_MemberName::compute_offsets() {
4231 InstanceKlass* k = vmClasses::MemberName_klass();
4232 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4233 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4234 }
4235
4236 #if INCLUDE_CDS
4237 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4238 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4239 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4240 }
4241 #endif
4242
4243 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4244 macro(_vmholder_offset, k, "vmholder", class_signature, false)
4245
4246 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4247 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4248 assert(k != nullptr, "jdk mismatch");
4249 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4250 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4251 }
4252
4253 #if INCLUDE_CDS
4254 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4255 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4256 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4257 }
4258 #endif
4259
4260 #define LAMBDAFORM_FIELDS_DO(macro) \
4261 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4262
4263 void java_lang_invoke_LambdaForm::compute_offsets() {
4264 InstanceKlass* k = vmClasses::LambdaForm_klass();
4265 assert (k != nullptr, "jdk mismatch");
4266 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4267 }
4268
4269 #if INCLUDE_CDS
4270 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4271 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4272 }
4273 #endif
4274
4275 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4276 return obj != nullptr && is_subclass(obj->klass());
4277 }
4278
4279 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4280 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4281
4282 #define NEP_FIELDS_DO(macro) \
4283 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
4284 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4285
4286 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4287 return obj != nullptr && is_subclass(obj->klass());
4288 }
4289
4290 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4291 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4292 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4293 }
4294
4295 #if INCLUDE_CDS
4296 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4297 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4298 }
4299 #endif
4300
4301 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4302 return entry->obj_field(_method_type_offset);
4303 }
4304
4305 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4306 return entry->long_field(_downcall_stub_address_offset);
4307 }
4308
4309 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4310 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4311 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4312 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4313 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4314 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4315 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4316
4317 #define ABIDescriptor_FIELDS_DO(macro) \
4318 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4319 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4320 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4321 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4322 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4323 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4324 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4325
4326 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4327 return obj != nullptr && is_subclass(obj->klass());
4328 }
4329
4330 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4331 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4332 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4333 }
4334
4335 #if INCLUDE_CDS
4336 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4337 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4338 }
4339 #endif
4340
4341 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4342 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4343 }
4344
4345 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4346 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4347 }
4348
4349 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4350 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4351 }
4352
4353 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4354 return entry->int_field(_stackAlignment_offset);
4355 }
4356
4357 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4358 return entry->int_field(_shadowSpace_offset);
4359 }
4360
4361 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4362 return entry->obj_field(_scratch1_offset);
4363 }
4364
4365 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4366 return entry->obj_field(_scratch2_offset);
4367 }
4368
4369 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4370 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4371 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4372 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4373
4374 #define VMStorage_FIELDS_DO(macro) \
4375 macro(_type_offset, k, "type", byte_signature, false); \
4376 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4377 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4378 macro(_debugName_offset, k, "debugName", string_signature, false); \
4379
4380 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4381 return obj != nullptr && is_subclass(obj->klass());
4382 }
4383
4384 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4385 InstanceKlass* k = vmClasses::VMStorage_klass();
4386 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4387 }
4388
4389 #if INCLUDE_CDS
4390 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4391 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4392 }
4393 #endif
4394
4395 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4396 return entry->byte_field(_type_offset);
4397 }
4398
4399 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4400 return entry->int_field(_indexOrOffset_offset);
4401 }
4402
4403 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4404 return entry->short_field(_segmentMaskOrSize_offset);
4405 }
4406
4407 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4408 return entry->obj_field(_debugName_offset);
4409 }
4410
4411 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4412 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4413
4414 #define CallConv_FIELDS_DO(macro) \
4415 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4416 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4417
4418 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4419 return obj != nullptr && is_subclass(obj->klass());
4420 }
4421
4422 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4423 InstanceKlass* k = vmClasses::CallConv_klass();
4424 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4425 }
4426
4427 #if INCLUDE_CDS
4428 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4429 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4430 }
4431 #endif
4432
4433 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4434 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4435 }
4436
4437 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4438 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4439 }
4440
4441 oop java_lang_invoke_MethodHandle::type(oop mh) {
4442 return mh->obj_field(_type_offset);
4443 }
4444
4445 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4446 mh->obj_field_put(_type_offset, mtype);
4447 }
4448
4449 oop java_lang_invoke_MethodHandle::form(oop mh) {
4450 assert(_form_offset != 0, "");
4451 return mh->obj_field(_form_offset);
4452 }
4453
4454 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4455 assert(_form_offset != 0, "");
4456 mh->obj_field_put(_form_offset, lform);
4457 }
4458
4459 /// MemberName accessors
4460
4461 oop java_lang_invoke_MemberName::clazz(oop mname) {
4462 assert(is_instance(mname), "wrong type");
4463 return mname->obj_field(_clazz_offset);
4464 }
4465
4466 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4467 assert(is_instance(mname), "wrong type");
4468 mname->obj_field_put(_clazz_offset, clazz);
4469 }
4470
4471 oop java_lang_invoke_MemberName::name(oop mname) {
4472 assert(is_instance(mname), "wrong type");
4473 return mname->obj_field(_name_offset);
4474 }
4475
4476 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4477 assert(is_instance(mname), "wrong type");
4478 mname->obj_field_put(_name_offset, name);
4479 }
4480
4481 oop java_lang_invoke_MemberName::type(oop mname) {
4482 assert(is_instance(mname), "wrong type");
4483 return mname->obj_field(_type_offset);
4484 }
4485
4486 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4487 assert(is_instance(mname), "wrong type");
4488 mname->obj_field_put(_type_offset, type);
4489 }
4490
4491 int java_lang_invoke_MemberName::flags(oop mname) {
4492 assert(is_instance(mname), "wrong type");
4493 return mname->int_field(_flags_offset);
4494 }
4495
4496 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4497 assert(is_instance(mname), "wrong type");
4498 mname->int_field_put(_flags_offset, flags);
4499 }
4500
4501
4502 // Return vmtarget from ResolvedMethodName method field through indirection
4503 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4504 assert(is_instance(mname), "wrong type");
4505 oop method = mname->obj_field(_method_offset);
4506 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4507 }
4508
4509 bool java_lang_invoke_MemberName::is_method(oop mname) {
4510 assert(is_instance(mname), "must be MemberName");
4511 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
4512 }
4513
4514 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4515 assert(is_instance(mname), "wrong type");
4516 mname->obj_field_put(_method_offset, resolved_method);
4517 }
4518
4519 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4520 assert(is_instance(mname), "wrong type");
4521 return (intptr_t) mname->address_field(_vmindex_offset);
4522 }
4523
4524 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4525 assert(is_instance(mname), "wrong type");
4526 mname->address_field_put(_vmindex_offset, (address) index);
4527 }
4528
4529
4530 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4531 assert(is_instance(resolved_method), "wrong type");
4532 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4533 assert(m->is_method(), "must be");
4534 return m;
4535 }
4536
4537 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4538 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4539 assert(is_instance(resolved_method), "wrong type");
4540 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4541 }
4542
4543 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4544 assert(is_instance(resolved_method), "wrong type");
4545 resolved_method->obj_field_put(_vmholder_offset, holder);
4546 }
4547
4548 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4549 const Method* method = m();
4550
4551 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4552 oop resolved_method = ResolvedMethodTable::find_method(method);
4553 if (resolved_method != nullptr) {
4554 return resolved_method;
4555 }
4556
4557 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4558 if (!k->is_initialized()) {
4559 k->initialize(CHECK_NULL);
4560 }
4561
4562 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4563
4564 NoSafepointVerifier nsv;
4565
4566 if (method->is_old()) {
4567 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4568 method->get_new_method();
4569 }
4570
4571 InstanceKlass* holder = method->method_holder();
4572
4573 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4574 // Add a reference to the loader (actually mirror because hidden classes may not have
4575 // distinct loaders) to ensure the metadata is kept alive.
4576 // This mirror may be different than the one in clazz field.
4577 set_vmholder(new_resolved_method, holder->java_mirror());
4578
4579 // Set flag in class to indicate this InstanceKlass has entries in the table
4580 // to avoid walking table during redefinition if none of the redefined classes
4581 // have any membernames in the table.
4582 holder->set_has_resolved_methods();
4583
4584 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4585 }
4586
4587 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4588 assert(is_instance(lform), "wrong type");
4589 return lform->obj_field(_vmentry_offset);
4590 }
4591
4592
4593 // Support for java_lang_invoke_MethodType
4594
4595 int java_lang_invoke_MethodType::_rtype_offset;
4596 int java_lang_invoke_MethodType::_ptypes_offset;
4597
4598 #define METHODTYPE_FIELDS_DO(macro) \
4599 macro(_rtype_offset, k, "rtype", class_signature, false); \
4600 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4601
4602 void java_lang_invoke_MethodType::compute_offsets() {
4603 InstanceKlass* k = vmClasses::MethodType_klass();
4604 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4605 }
4606
4607 #if INCLUDE_CDS
4608 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4609 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4610 }
4611 #endif
4612
4613 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4614 st->print("(");
4615 objArrayOop pts = ptypes(mt);
4616 if (pts != nullptr) {
4617 for (int i = 0, limit = pts->length(); i < limit; i++) {
4618 java_lang_Class::print_signature(pts->obj_at(i), st);
4619 }
4620 } else {
4621 st->print("null");
4622 }
4623 st->print(")");
4624 oop rt = rtype(mt);
4625 if (rt != nullptr) {
4626 java_lang_Class::print_signature(rt, st);
4627 } else {
4628 st->print("null");
4629 }
4630 }
4631
4632 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4633 ResourceMark rm;
4634 stringStream buffer(128);
4635 print_signature(mt, &buffer);
4636 const char* sigstr = buffer.base();
4637 int siglen = (int) buffer.size();
4638 Symbol *name;
4639 if (!intern_if_not_found) {
4640 name = SymbolTable::probe(sigstr, siglen);
4641 } else {
4642 name = SymbolTable::new_symbol(sigstr, siglen);
4643 }
4644 return name;
4645 }
4646
4647 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4648 if (mt1 == mt2)
4649 return true;
4650 if (rtype(mt1) != rtype(mt2))
4651 return false;
4652 if (ptype_count(mt1) != ptype_count(mt2))
4653 return false;
4654 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4655 if (ptype(mt1, i) != ptype(mt2, i))
4656 return false;
4657 }
4658 return true;
4659 }
4660
4661 oop java_lang_invoke_MethodType::rtype(oop mt) {
4662 assert(is_instance(mt), "must be a MethodType");
4663 return mt->obj_field(_rtype_offset);
4664 }
4665
4666 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4667 assert(is_instance(mt), "must be a MethodType");
4668 return (objArrayOop) mt->obj_field(_ptypes_offset);
4669 }
4670
4671 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4672 return ptypes(mt)->obj_at(idx);
4673 }
4674
4675 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4676 return ptypes(mt)->length();
4677 }
4678
4679 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4680 objArrayOop pts = ptypes(mt);
4681 int count = pts->length();
4682 int slots = 0;
4683 for (int i = 0; i < count; i++) {
4684 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4685 slots += type2size[bt];
4686 }
4687 return slots;
4688 }
4689
4690 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4691 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4692 return type2size[bt];
4693 }
4694
4695
4696 // Support for java_lang_invoke_CallSite
4697
4698 int java_lang_invoke_CallSite::_target_offset;
4699 int java_lang_invoke_CallSite::_vmdependencies_offset;
4700 int java_lang_invoke_CallSite::_last_cleanup_offset;
4701
4702 #define CALLSITE_FIELDS_DO(macro) \
4703 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
4704
4705 void java_lang_invoke_CallSite::compute_offsets() {
4706 InstanceKlass* k = vmClasses::CallSite_klass();
4707 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4708 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4709 }
4710
4711 #if INCLUDE_CDS
4712 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4713 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4714 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4715 }
4716 #endif
4717
4718 DependencyContext java_lang_invoke_CallSite::vmdependencies(oop call_site) {
4719 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4720 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4721 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4722 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4723 return dep_ctx;
4724 }
4725
4726 // Support for java_lang_invoke_ConstantCallSite
4727
4728 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4729
4730 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4731 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4732
4733 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4734 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4735 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4736 }
4737
4738 #if INCLUDE_CDS
4739 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4740 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4741 }
4742 #endif
4743
4744 // Support for java_lang_ClassLoader
4745
4746 int java_lang_ClassLoader::_loader_data_offset;
4747 int java_lang_ClassLoader::_parallelCapable_offset;
4748 int java_lang_ClassLoader::_name_offset;
4749 int java_lang_ClassLoader::_nameAndId_offset;
4750 int java_lang_ClassLoader::_unnamedModule_offset;
4751 int java_lang_ClassLoader::_parent_offset;
4752
4753 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4754 assert(loader != nullptr, "loader must not be null");
4755 assert(oopDesc::is_oop(loader), "loader must be oop");
4756 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4757 }
4758
4759 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4760 assert(loader != nullptr, "loader must not be null");
4761 assert(oopDesc::is_oop(loader), "loader must be oop");
4762 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4763 }
4764
4765 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4766 assert(loader != nullptr, "loader must not be null");
4767 assert(oopDesc::is_oop(loader), "loader must be oop");
4768 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4769 }
4770
4771 #define CLASSLOADER_FIELDS_DO(macro) \
4772 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4773 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4774 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
4775 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4776 macro(_parent_offset, k1, "parent", classloader_signature, false)
4777
4778 void java_lang_ClassLoader::compute_offsets() {
4779 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4780 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4781
4782 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4783 }
4784
4785 #if INCLUDE_CDS
4786 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4787 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4788 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4789 }
4790 #endif
4791
4792 oop java_lang_ClassLoader::parent(oop loader) {
4793 assert(is_instance(loader), "loader must be oop");
4794 return loader->obj_field(_parent_offset);
4795 }
4796
4797 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4798 assert(is_instance(loader), "loader must be oop");
4799 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4800 }
4801
4802 // Returns the name field of this class loader. If the name field has not
4803 // been set, null will be returned.
4804 oop java_lang_ClassLoader::name(oop loader) {
4805 assert(is_instance(loader), "loader must be oop");
4806 return loader->obj_field(_name_offset);
4807 }
4808
4809 // Returns the nameAndId field of this class loader. The format is
4810 // as follows:
4811 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4812 // If the defining loader has no name then <qualified-class-name> @<id>
4813 // If built-in loader, then omit '@<id>' as there is only one instance.
4814 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4815 oop java_lang_ClassLoader::nameAndId(oop loader) {
4816 assert(is_instance(loader), "loader must be oop");
4817 return loader->obj_field(_nameAndId_offset);
4818 }
4819
4820 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4821 assert(is_instance(loader), "loader must be oop");
4822 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4823 oop acl = loader;
4824 debug_only(jint loop_count = 0);
4825 // This loop taken verbatim from ClassLoader.java:
4826 do {
4827 acl = parent(acl);
4828 if (cl == acl) {
4829 return true;
4830 }
4831 assert(++loop_count > 0, "loop_count overflow");
4832 } while (acl != nullptr);
4833 return false;
4834 }
4835
4836 bool java_lang_ClassLoader::is_instance(oop obj) {
4837 return obj != nullptr && is_subclass(obj->klass());
4838 }
4839
4840
4841 // For class loader classes, parallelCapable defined
4842 // based on non-null field
4843 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4844 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4845 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4846 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4847 }
4848
4849 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4850 oop cl = SystemDictionary::java_system_loader();
4851 while(cl != nullptr) {
4852 if (cl == loader) return true;
4853 cl = parent(cl);
4854 }
4855 return false;
4856 }
4857
4858 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4859 assert(is_instance(loader), "loader must be oop");
4860 return loader->obj_field(_unnamedModule_offset);
4861 }
4862
4863 // Support for java_lang_System
4864 //
4865
4866 int java_lang_System::_static_in_offset;
4867 int java_lang_System::_static_out_offset;
4868 int java_lang_System::_static_err_offset;
4869
4870 #define SYSTEM_FIELDS_DO(macro) \
4871 macro(_static_in_offset, k, "in", input_stream_signature, true); \
4872 macro(_static_out_offset, k, "out", print_stream_signature, true); \
4873 macro(_static_err_offset, k, "err", print_stream_signature, true);
4874
4875 void java_lang_System::compute_offsets() {
4876 InstanceKlass* k = vmClasses::System_klass();
4877 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4878 }
4879
4880 #if INCLUDE_CDS
4881 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4882 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4883 }
4884 #endif
4885
4886 // Support for jdk_internal_misc_UnsafeConstants
4887 //
4888 class UnsafeConstantsFixup : public FieldClosure {
4889 private:
4890 int _address_size;
4891 int _page_size;
4892 bool _big_endian;
4893 bool _use_unaligned_access;
4894 int _data_cache_line_flush_size;
4895 public:
4896 UnsafeConstantsFixup() {
4897 // round up values for all static final fields
4898 _address_size = sizeof(void*);
4899 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4900 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4901 _use_unaligned_access = UseUnalignedAccesses;
4902 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4903 }
4904
4905 void do_field(fieldDescriptor* fd) {
4906 oop mirror = fd->field_holder()->java_mirror();
4907 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4908 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4909 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4910 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4911 if (fd->name() == vmSymbols::address_size_name()) {
4912 mirror->int_field_put(fd->offset(), _address_size);
4913 } else if (fd->name() == vmSymbols::page_size_name()) {
4914 mirror->int_field_put(fd->offset(), _page_size);
4915 } else if (fd->name() == vmSymbols::big_endian_name()) {
4916 mirror->bool_field_put(fd->offset(), _big_endian);
4917 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4918 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4919 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4920 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4921 } else {
4922 assert(false, "unexpected UnsafeConstants field");
4923 }
4924 }
4925 };
4926
4927 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4928 UnsafeConstantsFixup fixup;
4929 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4930 }
4931
4932
4933 // java_lang_StackTraceElement
4934
4935 int java_lang_StackTraceElement::_methodName_offset;
4936 int java_lang_StackTraceElement::_fileName_offset;
4937 int java_lang_StackTraceElement::_lineNumber_offset;
4938 int java_lang_StackTraceElement::_moduleName_offset;
4939 int java_lang_StackTraceElement::_moduleVersion_offset;
4940 int java_lang_StackTraceElement::_classLoaderName_offset;
4941 int java_lang_StackTraceElement::_declaringClass_offset;
4942 int java_lang_StackTraceElement::_declaringClassObject_offset;
4943
4944 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4945 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4946 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4947 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
4948 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4949 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
4950 macro(_methodName_offset, k, "methodName", string_signature, false); \
4951 macro(_fileName_offset, k, "fileName", string_signature, false); \
4952 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
4953
4954 // Support for java_lang_StackTraceElement
4955 void java_lang_StackTraceElement::compute_offsets() {
4956 InstanceKlass* k = vmClasses::StackTraceElement_klass();
4957 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4958 }
4959
4960 #if INCLUDE_CDS
4961 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4962 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4963 }
4964 #endif
4965
4966 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4967 element->obj_field_put(_fileName_offset, value);
4968 }
4969
4970 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4971 element->obj_field_put(_declaringClass_offset, value);
4972 }
4973
4974 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4975 element->obj_field_put(_methodName_offset, value);
4976 }
4977
4978 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4979 element->int_field_put(_lineNumber_offset, value);
4980 }
4981
4982 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4983 element->obj_field_put(_moduleName_offset, value);
4984 }
4985
4986 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4987 element->obj_field_put(_moduleVersion_offset, value);
4988 }
4989
4990 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4991 element->obj_field_put(_classLoaderName_offset, value);
4992 }
4993
4994 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4995 element->obj_field_put(_declaringClassObject_offset, value);
4996 }
4997
4998
4999 // java_lang_AssertionStatusDirectives
5000
5001 int java_lang_AssertionStatusDirectives::_classes_offset;
5002 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
5003 int java_lang_AssertionStatusDirectives::_packages_offset;
5004 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
5005 int java_lang_AssertionStatusDirectives::_deflt_offset;
5006
5007 // Support for java Assertions - java_lang_AssertionStatusDirectives.
5008 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
5009 macro(_classes_offset, k, "classes", string_array_signature, false); \
5010 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
5011 macro(_packages_offset, k, "packages", string_array_signature, false); \
5012 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
5013 macro(_deflt_offset, k, "deflt", bool_signature, false)
5014
5015 void java_lang_AssertionStatusDirectives::compute_offsets() {
5016 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
5017 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5018 }
5019
5020 #if INCLUDE_CDS
5021 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
5022 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5023 }
5024 #endif
5025
5026 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
5027 o->obj_field_put(_classes_offset, val);
5028 }
5029
5030 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
5031 o->obj_field_put(_classEnabled_offset, val);
5032 }
5033
5034 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
5035 o->obj_field_put(_packages_offset, val);
5036 }
5037
5038 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
5039 o->obj_field_put(_packageEnabled_offset, val);
5040 }
5041
5042 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
5043 o->bool_field_put(_deflt_offset, val);
5044 }
5045
5046 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
5047
5048 #define AOS_FIELDS_DO(macro) \
5049 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
5050
5051 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
5052 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
5053 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5054 }
5055
5056 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
5057 assert(_owner_offset != 0, "Must be initialized");
5058 return obj->obj_field(_owner_offset);
5059 }
5060
5061 #if INCLUDE_CDS
5062 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
5063 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5064 }
5065 #endif
5066
5067 int vector_VectorPayload::_payload_offset;
5068
5069 #define VECTORPAYLOAD_FIELDS_DO(macro) \
5070 macro(_payload_offset, k, "payload", object_signature, false)
5071
5072 void vector_VectorPayload::compute_offsets() {
5073 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
5074 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5075 }
5076
5077 #if INCLUDE_CDS
5078 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
5079 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5080 }
5081 #endif
5082
5083 void vector_VectorPayload::set_payload(oop o, oop val) {
5084 o->obj_field_put(_payload_offset, val);
5085 }
5086
5087 bool vector_VectorPayload::is_instance(oop obj) {
5088 return obj != nullptr && is_subclass(obj->klass());
5089 }
5090
5091 int java_lang_Integer_IntegerCache::_static_cache_offset;
5092 int java_lang_Long_LongCache::_static_cache_offset;
5093 int java_lang_Character_CharacterCache::_static_cache_offset;
5094 int java_lang_Short_ShortCache::_static_cache_offset;
5095 int java_lang_Byte_ByteCache::_static_cache_offset;
5096
5097 #define INTEGER_CACHE_FIELDS_DO(macro) \
5098 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5099
5100 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5101 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5102 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5103 }
5104
5105 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5106 oop base = ik->static_field_base_raw();
5107 return objArrayOop(base->obj_field(_static_cache_offset));
5108 }
5109
5110 Symbol* java_lang_Integer_IntegerCache::symbol() {
5111 return vmSymbols::java_lang_Integer_IntegerCache();
5112 }
5113
5114 #if INCLUDE_CDS
5115 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5116 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5117 }
5118 #endif
5119 #undef INTEGER_CACHE_FIELDS_DO
5120
5121 jint java_lang_Integer::value(oop obj) {
5122 jvalue v;
5123 java_lang_boxing_object::get_value(obj, &v);
5124 return v.i;
5125 }
5126
5127 #define LONG_CACHE_FIELDS_DO(macro) \
5128 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5129
5130 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5131 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5132 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5133 }
5134
5135 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5136 oop base = ik->static_field_base_raw();
5137 return objArrayOop(base->obj_field(_static_cache_offset));
5138 }
5139
5140 Symbol* java_lang_Long_LongCache::symbol() {
5141 return vmSymbols::java_lang_Long_LongCache();
5142 }
5143
5144 #if INCLUDE_CDS
5145 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5146 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5147 }
5148 #endif
5149 #undef LONG_CACHE_FIELDS_DO
5150
5151 jlong java_lang_Long::value(oop obj) {
5152 jvalue v;
5153 java_lang_boxing_object::get_value(obj, &v);
5154 return v.j;
5155 }
5156
5157 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5158 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5159
5160 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5161 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5162 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5163 }
5164
5165 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5166 oop base = ik->static_field_base_raw();
5167 return objArrayOop(base->obj_field(_static_cache_offset));
5168 }
5169
5170 Symbol* java_lang_Character_CharacterCache::symbol() {
5171 return vmSymbols::java_lang_Character_CharacterCache();
5172 }
5173
5174 #if INCLUDE_CDS
5175 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5176 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5177 }
5178 #endif
5179 #undef CHARACTER_CACHE_FIELDS_DO
5180
5181 jchar java_lang_Character::value(oop obj) {
5182 jvalue v;
5183 java_lang_boxing_object::get_value(obj, &v);
5184 return v.c;
5185 }
5186
5187 #define SHORT_CACHE_FIELDS_DO(macro) \
5188 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5189
5190 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5191 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5192 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5193 }
5194
5195 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5196 oop base = ik->static_field_base_raw();
5197 return objArrayOop(base->obj_field(_static_cache_offset));
5198 }
5199
5200 Symbol* java_lang_Short_ShortCache::symbol() {
5201 return vmSymbols::java_lang_Short_ShortCache();
5202 }
5203
5204 #if INCLUDE_CDS
5205 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5206 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5207 }
5208 #endif
5209 #undef SHORT_CACHE_FIELDS_DO
5210
5211 jshort java_lang_Short::value(oop obj) {
5212 jvalue v;
5213 java_lang_boxing_object::get_value(obj, &v);
5214 return v.s;
5215 }
5216
5217 #define BYTE_CACHE_FIELDS_DO(macro) \
5218 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5219
5220 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5221 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5222 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5223 }
5224
5225 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5226 oop base = ik->static_field_base_raw();
5227 return objArrayOop(base->obj_field(_static_cache_offset));
5228 }
5229
5230 Symbol* java_lang_Byte_ByteCache::symbol() {
5231 return vmSymbols::java_lang_Byte_ByteCache();
5232 }
5233
5234 #if INCLUDE_CDS
5235 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5236 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5237 }
5238 #endif
5239 #undef BYTE_CACHE_FIELDS_DO
5240
5241 jbyte java_lang_Byte::value(oop obj) {
5242 jvalue v;
5243 java_lang_boxing_object::get_value(obj, &v);
5244 return v.b;
5245 }
5246
5247 int java_lang_Boolean::_static_TRUE_offset;
5248 int java_lang_Boolean::_static_FALSE_offset;
5249
5250 #define BOOLEAN_FIELDS_DO(macro) \
5251 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5252 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5253
5254
5255 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5256 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5257 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5258 }
5259
5260 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5261 oop base = ik->static_field_base_raw();
5262 return base->obj_field(_static_TRUE_offset);
5263 }
5264
5265 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5266 oop base = ik->static_field_base_raw();
5267 return base->obj_field(_static_FALSE_offset);
5268 }
5269
5270 Symbol* java_lang_Boolean::symbol() {
5271 return vmSymbols::java_lang_Boolean();
5272 }
5273
5274 #if INCLUDE_CDS
5275 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5276 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5277 }
5278 #endif
5279 #undef BOOLEAN_CACHE_FIELDS_DO
5280
5281 jboolean java_lang_Boolean::value(oop obj) {
5282 jvalue v;
5283 java_lang_boxing_object::get_value(obj, &v);
5284 return v.z;
5285 }
5286
5287 // java_lang_reflect_RecordComponent
5288
5289 int java_lang_reflect_RecordComponent::_clazz_offset;
5290 int java_lang_reflect_RecordComponent::_name_offset;
5291 int java_lang_reflect_RecordComponent::_type_offset;
5292 int java_lang_reflect_RecordComponent::_accessor_offset;
5293 int java_lang_reflect_RecordComponent::_signature_offset;
5294 int java_lang_reflect_RecordComponent::_annotations_offset;
5295 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5296
5297 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5298 macro(_clazz_offset, k, "clazz", class_signature, false); \
5299 macro(_name_offset, k, "name", string_signature, false); \
5300 macro(_type_offset, k, "type", class_signature, false); \
5301 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5302 macro(_signature_offset, k, "signature", string_signature, false); \
5303 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5304 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5305
5306 // Support for java_lang_reflect_RecordComponent
5307 void java_lang_reflect_RecordComponent::compute_offsets() {
5308 InstanceKlass* k = vmClasses::RecordComponent_klass();
5309 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5310 }
5311
5312 #if INCLUDE_CDS
5313 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5314 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5315 }
5316 #endif
5317
5318 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5319 element->obj_field_put(_clazz_offset, value);
5320 }
5321
5322 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5323 element->obj_field_put(_name_offset, value);
5324 }
5325
5326 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5327 element->obj_field_put(_type_offset, value);
5328 }
5329
5330 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5331 element->obj_field_put(_accessor_offset, value);
5332 }
5333
5334 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5335 element->obj_field_put(_signature_offset, value);
5336 }
5337
5338 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5339 element->obj_field_put(_annotations_offset, value);
5340 }
5341
5342 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5343 element->obj_field_put(_typeAnnotations_offset, value);
5344 }
5345
5346 // java_lang_InternalError
5347 int java_lang_InternalError::_during_unsafe_access_offset;
5348
5349 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5350 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5351 }
5352
5353 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5354 return internal_error->bool_field(_during_unsafe_access_offset);
5355 }
5356
5357 void java_lang_InternalError::compute_offsets() {
5358 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5359 }
5360
5361 #if INCLUDE_CDS
5362 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5363 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5364 }
5365 #endif
5366
5367 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5368 f(java_lang_Class) \
5369 f(java_lang_String) \
5370 f(java_lang_ref_Reference) \
5371 //end
5372
5373 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5374 f(java_lang_System) \
5375 f(java_lang_ClassLoader) \
5376 f(java_lang_Throwable) \
5377 f(java_lang_Thread) \
5378 f(java_lang_Thread_FieldHolder) \
5379 f(java_lang_Thread_Constants) \
5380 f(java_lang_ThreadGroup) \
5381 f(java_lang_VirtualThread) \
5382 f(java_lang_InternalError) \
5383 f(java_lang_AssertionStatusDirectives) \
5384 f(java_lang_ref_SoftReference) \
5385 f(java_lang_invoke_MethodHandle) \
5386 f(java_lang_invoke_DirectMethodHandle) \
5387 f(java_lang_invoke_MemberName) \
5388 f(java_lang_invoke_ResolvedMethodName) \
5389 f(java_lang_invoke_LambdaForm) \
5390 f(java_lang_invoke_MethodType) \
5391 f(java_lang_invoke_CallSite) \
5392 f(java_lang_invoke_ConstantCallSite) \
5393 f(java_lang_reflect_AccessibleObject) \
5394 f(java_lang_reflect_Method) \
5395 f(java_lang_reflect_Constructor) \
5396 f(java_lang_reflect_Field) \
5397 f(java_lang_reflect_RecordComponent) \
5398 f(reflect_ConstantPool) \
5399 f(java_lang_reflect_Parameter) \
5400 f(java_lang_Module) \
5401 f(java_lang_StackTraceElement) \
5402 f(java_lang_ClassFrameInfo) \
5403 f(java_lang_StackFrameInfo) \
5404 f(java_lang_LiveStackFrameInfo) \
5405 f(jdk_internal_vm_ContinuationScope) \
5406 f(jdk_internal_vm_Continuation) \
5407 f(jdk_internal_vm_StackChunk) \
5408 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5409 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5410 f(jdk_internal_foreign_abi_ABIDescriptor) \
5411 f(jdk_internal_foreign_abi_VMStorage) \
5412 f(jdk_internal_foreign_abi_CallConv) \
5413 f(jdk_internal_misc_UnsafeConstants) \
5414 f(java_lang_boxing_object) \
5415 f(vector_VectorPayload) \
5416 //end
5417
5418 #define BASIC_JAVA_CLASSES_DO(f) \
5419 BASIC_JAVA_CLASSES_DO_PART1(f) \
5420 BASIC_JAVA_CLASSES_DO_PART2(f)
5421
5422 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5423
5424 // Compute field offsets of all the classes in this file
5425 void JavaClasses::compute_offsets() {
5426 if (CDSConfig::is_using_archive()) {
5427 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5428 JvmtiExport::has_early_class_hook_env()),
5429 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5430 // None of the classes used by the rest of this function can be replaced by
5431 // JVMTI ClassFileLoadHook.
5432 // We are safe to use the archived offsets, which have already been restored
5433 // by JavaClasses::serialize_offsets, without computing the offsets again.
5434 return;
5435 }
5436
5437 // We have already called the compute_offsets() of the
5438 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5439 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5440 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5441 }
5442
5443 #if INCLUDE_CDS
5444 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5445
5446 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5447 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5448 }
5449 #endif
5450
5451 #if INCLUDE_CDS_JAVA_HEAP
5452 bool JavaClasses::is_supported_for_archiving(oop obj) {
5453 Klass* klass = obj->klass();
5454
5455 if (!CDSConfig::is_dumping_method_handles()) {
5456 // These are supported by CDS only when CDSConfig::is_dumping_method_handles() is enabled.
5457 if (klass == vmClasses::ResolvedMethodName_klass() ||
5458 klass == vmClasses::MemberName_klass()) {
5459 return false;
5460 }
5461 }
5462
5463 if (klass->is_subclass_of(vmClasses::Reference_klass())) {
5464 // It's problematic to archive Reference objects. One of the reasons is that
5465 // Reference::discovered may pull in unwanted objects (see JDK-8284336)
5466 return false;
5467 }
5468
5469 return true;
5470 }
5471 #endif
5472
5473 #ifndef PRODUCT
5474
5475 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5476
5477 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5478 const char* field_sig) {
5479 EXCEPTION_MARK;
5480 fieldDescriptor fd;
5481 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5482 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5483 InstanceKlass* ik = InstanceKlass::cast(k);
5484 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5485 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5486 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5487 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5488 return false;
5489 }
5490 if (fd.is_static()) {
5491 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5492 return false;
5493 }
5494 if (fd.offset() == deserialized_offset ) {
5495 return true;
5496 } else {
5497 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5498 klass_name, field_name, deserialized_offset, fd.offset());
5499 return false;
5500 }
5501 }
5502
5503 void JavaClasses::check_offsets() {
5504 bool valid = true;
5505
5506 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5507 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5508
5509 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5510 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5511
5512 // Boxed primitive objects (java_lang_boxing_object)
5513
5514 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
5515 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5516 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
5517 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5518 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
5519 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
5520 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
5521 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5522
5523 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5524 }
5525
5526 #endif // PRODUCT
5527
5528 int InjectedField::compute_offset() {
5529 InstanceKlass* ik = InstanceKlass::cast(klass());
5530 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5531 if (!may_be_java && !fs.field_flags().is_injected()) {
5532 // Only look at injected fields
5533 continue;
5534 }
5535 if (fs.name() == name() && fs.signature() == signature()) {
5536 return fs.offset();
5537 }
5538 }
5539 ResourceMark rm;
5540 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)" : "");
5541 #ifndef PRODUCT
5542 ik->print();
5543 tty->print_cr("all fields:");
5544 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5545 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());
5546 }
5547 #endif //PRODUCT
5548 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5549 return -1;
5550 }
5551
5552 void javaClasses_init() {
5553 JavaClasses::compute_offsets();
5554 JavaClasses::check_offsets();
5555 FilteredFieldsMap::initialize(); // must be done after computing offsets.
5556 }