1 /*
2 * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "cds/aotMetaspace.hpp"
26 #include "cds/aotReferenceObjSupport.hpp"
27 #include "cds/archiveBuilder.hpp"
28 #include "cds/archiveHeapLoader.hpp"
29 #include "cds/cdsConfig.hpp"
30 #include "cds/heapShared.hpp"
31 #include "classfile/altHashing.hpp"
32 #include "classfile/classLoaderData.inline.hpp"
33 #include "classfile/javaClasses.inline.hpp"
34 #include "classfile/javaClassesImpl.hpp"
35 #include "classfile/javaThreadStatus.hpp"
36 #include "classfile/moduleEntry.hpp"
37 #include "classfile/stringTable.hpp"
38 #include "classfile/symbolTable.hpp"
39 #include "classfile/systemDictionary.hpp"
40 #include "classfile/vmClasses.hpp"
41 #include "classfile/vmSymbols.hpp"
42 #include "code/debugInfo.hpp"
43 #include "code/dependencyContext.hpp"
44 #include "code/pcDesc.hpp"
45 #include "gc/shared/collectedHeap.inline.hpp"
46 #include "interpreter/interpreter.hpp"
47 #include "interpreter/linkResolver.hpp"
48 #include "jvm.h"
49 #include "logging/log.hpp"
50 #include "logging/logStream.hpp"
51 #include "memory/oopFactory.hpp"
52 #include "memory/resourceArea.hpp"
53 #include "memory/universe.hpp"
54 #include "oops/fieldInfo.hpp"
55 #include "oops/fieldStreams.inline.hpp"
56 #include "oops/instanceKlass.inline.hpp"
57 #include "oops/instanceMirrorKlass.hpp"
58 #include "oops/klass.inline.hpp"
59 #include "oops/method.inline.hpp"
60 #include "oops/objArrayKlass.hpp"
61 #include "oops/objArrayOop.inline.hpp"
62 #include "oops/oop.inline.hpp"
63 #include "oops/oopCast.inline.hpp"
64 #include "oops/recordComponent.hpp"
65 #include "oops/symbol.hpp"
66 #include "oops/typeArrayOop.inline.hpp"
67 #include "prims/jvmtiExport.hpp"
68 #include "prims/methodHandles.hpp"
69 #include "prims/resolvedMethodTable.hpp"
70 #include "runtime/continuationEntry.inline.hpp"
71 #include "runtime/continuationJavaClasses.inline.hpp"
72 #include "runtime/fieldDescriptor.inline.hpp"
73 #include "runtime/frame.inline.hpp"
74 #include "runtime/handles.inline.hpp"
75 #include "runtime/handshake.hpp"
76 #include "runtime/init.hpp"
77 #include "runtime/interfaceSupport.inline.hpp"
78 #include "runtime/java.hpp"
79 #include "runtime/javaCalls.hpp"
80 #include "runtime/javaThread.hpp"
81 #include "runtime/jniHandles.inline.hpp"
82 #include "runtime/reflectionUtils.hpp"
83 #include "runtime/safepoint.hpp"
84 #include "runtime/safepointVerifiers.hpp"
85 #include "runtime/threadSMR.hpp"
86 #include "runtime/vframe.inline.hpp"
87 #include "runtime/vm_version.hpp"
88 #include "utilities/align.hpp"
89 #include "utilities/globalDefinitions.hpp"
90 #include "utilities/growableArray.hpp"
91 #include "utilities/preserveException.hpp"
92 #include "utilities/utf8.hpp"
93 #if INCLUDE_JVMCI
94 #include "jvmci/jvmciJavaClasses.hpp"
95 #endif
96
97 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
98 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
99
100 InjectedField JavaClasses::_injected_fields[] = {
101 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
102 };
103
104 // Register native methods of Object
105 void java_lang_Object::register_natives(TRAPS) {
106 InstanceKlass* obj = vmClasses::Object_klass();
107 Method::register_native(obj, vmSymbols::hashCode_name(),
108 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
109 Method::register_native(obj, vmSymbols::wait_name(),
110 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
111 Method::register_native(obj, vmSymbols::notify_name(),
112 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
113 Method::register_native(obj, vmSymbols::notifyAll_name(),
114 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
115 Method::register_native(obj, vmSymbols::clone_name(),
116 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
117 }
118
119 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
120 return _injected_fields[(int)id].compute_offset();
121 }
122
123 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
124 *field_count = 0;
125
126 vmSymbolID sid = vmSymbols::find_sid(class_name);
127 if (sid == vmSymbolID::NO_SID) {
128 // Only well known classes can inject fields
129 return nullptr;
130 }
131
132 int count = 0;
133 int start = -1;
134
135 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
136 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \
137 count++; \
138 if (start == -1) { \
139 start = (int)InjectedFieldID::klass##_##name##_enum; \
140 } \
141 }
142 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
143 #undef LOOKUP_INJECTED_FIELD
144
145 if (start != -1) {
146 *field_count = count;
147 return _injected_fields + start;
148 }
149 return nullptr;
150 }
151
152
153 // Helpful routine for computing field offsets at run time rather than hardcoding them
154 // Finds local fields only, including static fields. Static field offsets are from the
155 // beginning of the mirror.
156 void JavaClasses::compute_offset(int &dest_offset,
157 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
158 bool is_static) {
159 fieldDescriptor fd;
160 if (ik == nullptr) {
161 ResourceMark rm;
162 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
163 vm_exit_during_initialization("Invalid layout of well-known class");
164 }
165
166 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
167 ResourceMark rm;
168 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
169 name_symbol->as_C_string(), signature_symbol->as_C_string());
170 #ifndef PRODUCT
171 // Prints all fields and offsets
172 Log(class) lt;
173 LogStream ls(lt.error());
174 ik->print_on(&ls);
175 #endif //PRODUCT
176 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
177 }
178 dest_offset = fd.offset();
179 }
180
181 // Overloading to pass name as a string.
182 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
183 const char* name_string, Symbol* signature_symbol,
184 bool is_static) {
185 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
186 if (name == nullptr) {
187 ResourceMark rm;
188 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
189 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
190 }
191 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
192 }
193
194 // java_lang_String
195
196 int java_lang_String::_value_offset;
197 int java_lang_String::_hash_offset;
198 int java_lang_String::_hashIsZero_offset;
199 int java_lang_String::_coder_offset;
200 int java_lang_String::_flags_offset;
201
202 bool java_lang_String::_initialized;
203
204
205 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
206 uint8_t* addr = flags_addr(java_string);
207 uint8_t value = 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 int java_lang_Class::_raw_access_flags_offset;
873
874 bool java_lang_Class::_offsets_computed = false;
875 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
876 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
877
878 #ifdef ASSERT
879 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
880 assert(fd->has_initial_value(), "caller should have checked this");
881 assert(fd->field_type() == T_OBJECT, "caller should have checked this");
882 assert(fd->signature() == vmSymbols::string_signature(), "just checking");
883 }
884 #endif
885
886 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
887 DEBUG_ONLY(assert_valid_static_string_field(fd);)
888 oop string = fd->string_initial_value(CHECK);
889 mirror()->obj_field_put(fd->offset(), string);
890 }
891
892 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
893 assert(fd->has_initial_value(), "caller should have checked this");
894 BasicType t = fd->field_type();
895 switch (t) {
896 case T_BYTE:
897 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value()));
898 break;
899 case T_BOOLEAN:
900 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value()));
901 break;
902 case T_CHAR:
903 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value()));
904 break;
905 case T_SHORT:
906 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value()));
907 break;
908 case T_INT:
909 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
910 break;
911 case T_FLOAT:
912 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
913 break;
914 case T_DOUBLE:
915 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
916 break;
917 case T_LONG:
918 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
919 break;
920 default:
921 // Illegal ConstantValue attribute in class file should have been
922 // caught during classfile parsing.
923 ShouldNotReachHere();
924 }
925 }
926
927 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
928 assert(mirror.not_null() && fd->is_static(), "just checking");
929 if (fd->has_initial_value()) {
930 if (fd->field_type() != T_OBJECT) {
931 initialize_static_primitive_field(fd, mirror);
932 } else {
933 initialize_static_string_field(fd, mirror, CHECK);
934 }
935 }
936 }
937
938 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
939 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
940
941 // If the offset was read from the shared archive, it was fixed up already
942 if (!k->in_aot_cache()) {
943 if (k->is_instance_klass()) {
944 // During bootstrap, java.lang.Class wasn't loaded so static field
945 // offsets were computed without the size added it. Go back and
946 // update all the static field offsets to included the size.
947
948 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
949 // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
950 // static fields offsets are updated in this array before reencoding everything into
951 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
952
953 int java_fields;
954 int injected_fields;
955 InstanceKlass* ik = InstanceKlass::cast(k);
956 GrowableArray<FieldInfo>* fields =
957 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
958 &java_fields, &injected_fields);
959 for (int i = 0; i < fields->length(); i++) {
960 FieldInfo* fi = fields->adr_at(i);
961 if (fi->access_flags().is_static()) {
962 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
963 }
964 }
965 Array<u1>* old_stream = ik->fieldinfo_stream();
966 assert(fields->length() == (java_fields + injected_fields), "Must be");
967 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
968 ik->set_fieldinfo_stream(new_fis);
969 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
970
971 Array<u1>* old_table = ik->fieldinfo_search_table();
972 Array<u1>* search_table = FieldInfoStream::create_search_table(ik->constants(), new_fis, k->class_loader_data(), CHECK);
973 ik->set_fieldinfo_search_table(search_table);
974 MetadataFactory::free_array<u1>(k->class_loader_data(), old_table);
975
976 DEBUG_ONLY(FieldInfoStream::validate_search_table(ik->constants(), new_fis, search_table));
977 }
978 }
979
980 if (k->in_aot_cache() && k->has_archived_mirror_index()) {
981 if (ArchiveHeapLoader::is_in_use()) {
982 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
983 assert(present, "Missing archived mirror for %s", k->external_name());
984 return;
985 } else {
986 k->clear_java_mirror_handle();
987 k->clear_archived_mirror_index();
988 }
989 }
990 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
991 }
992
993 void java_lang_Class::initialize_mirror_fields(Klass* k,
994 Handle mirror,
995 Handle protection_domain,
996 Handle classData,
997 TRAPS) {
998 // Allocate a simple java object for a lock.
999 // This needs to be a java object because during class initialization
1000 // it can be held across a java call.
1001 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
1002 set_init_lock(mirror(), r);
1003
1004 // Set protection domain also
1005 set_protection_domain(mirror(), protection_domain());
1006
1007 // Initialize static fields
1008 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
1009
1010 // Set classData
1011 set_class_data(mirror(), classData());
1012 }
1013
1014 // Set the java.lang.Module module field in the java_lang_Class mirror
1015 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
1016 if (module.is_null()) {
1017 // During startup, the module may be null only if java.base has not been defined yet.
1018 // Put the class on the fixup_module_list to patch later when the java.lang.Module
1019 // for java.base is known. But note that since we captured the null module another
1020 // thread may have completed that initialization.
1021
1022 bool javabase_was_defined = false;
1023 {
1024 MutexLocker m1(current, Module_lock);
1025 // Keep list of classes needing java.base module fixup
1026 if (!ModuleEntryTable::javabase_defined()) {
1027 assert(k->java_mirror() != nullptr, "Class's mirror is null");
1028 k->class_loader_data()->inc_keep_alive_ref_count();
1029 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
1030 fixup_module_field_list()->push(k);
1031 } else {
1032 javabase_was_defined = true;
1033 }
1034 }
1035
1036 // If java.base was already defined then patch this particular class with java.base.
1037 if (javabase_was_defined) {
1038 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
1039 assert(javabase_entry != nullptr && javabase_entry->module_oop() != nullptr,
1040 "Setting class module field, " JAVA_BASE_NAME " should be defined");
1041 Handle javabase_handle(current, javabase_entry->module_oop());
1042 set_module(mirror(), javabase_handle());
1043 }
1044 } else {
1045 assert(Universe::is_module_initialized() ||
1046 (ModuleEntryTable::javabase_defined() &&
1047 (module() == ModuleEntryTable::javabase_moduleEntry()->module_oop())),
1048 "Incorrect java.lang.Module specification while creating mirror");
1049 set_module(mirror(), module());
1050 }
1051 }
1052
1053 // Statically allocate fixup lists because they always get created.
1054 void java_lang_Class::allocate_fixup_lists() {
1055 GrowableArray<Klass*>* mirror_list =
1056 new (mtClass) GrowableArray<Klass*>(40, mtClass);
1057 set_fixup_mirror_list(mirror_list);
1058
1059 GrowableArray<Klass*>* module_list =
1060 new (mtModule) GrowableArray<Klass*>(500, mtModule);
1061 set_fixup_module_field_list(module_list);
1062 }
1063
1064 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
1065 Handle& mirror, Handle& comp_mirror, TRAPS) {
1066 // Allocate mirror (java.lang.Class instance)
1067 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
1068 mirror = Handle(THREAD, mirror_oop);
1069
1070 // Setup indirection from mirror->klass
1071 set_klass(mirror(), k);
1072
1073 // Set the modifiers flag.
1074 u2 computed_modifiers = k->compute_modifier_flags();
1075 set_modifiers(mirror(), computed_modifiers);
1076 // Set the raw access_flags, this is used by reflection instead of modifier flags.
1077 // The Java code for array classes gets the access flags from the element type.
1078 assert(!k->is_array_klass() || k->access_flags().as_unsigned_short() == 0, "access flags are not set for arrays");
1079 set_raw_access_flags(mirror(), k->access_flags().as_unsigned_short());
1080
1081 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
1082 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
1083
1084 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
1085
1086 // It might also have a component mirror. This mirror must already exist.
1087 if (k->is_array_klass()) {
1088 if (k->is_typeArray_klass()) {
1089 BasicType type = TypeArrayKlass::cast(k)->element_type();
1090 if (is_scratch) {
1091 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
1092 } else {
1093 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
1094 }
1095 } else {
1096 assert(k->is_objArray_klass(), "Must be");
1097 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1098 assert(element_klass != nullptr, "Must have an element klass");
1099 if (is_scratch) {
1100 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1101 } else {
1102 comp_mirror = Handle(THREAD, element_klass->java_mirror());
1103 }
1104 }
1105 assert(comp_mirror() != nullptr, "must have a mirror");
1106
1107 // Two-way link between the array klass and its component mirror:
1108 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1109 set_component_mirror(mirror(), comp_mirror());
1110 // See below for ordering dependencies between field array_klass in component mirror
1111 // and java_mirror in this klass.
1112 } else {
1113 assert(k->is_instance_klass(), "Must be");
1114
1115 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD);
1116 if (HAS_PENDING_EXCEPTION) {
1117 // If any of the fields throws an exception like OOM remove the klass field
1118 // from the mirror so GC doesn't follow it after the klass has been deallocated.
1119 // This mirror looks like a primitive type, which logically it is because it
1120 // it represents no class.
1121 set_klass(mirror(), nullptr);
1122 return;
1123 }
1124 }
1125 }
1126
1127 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1128 Handle module, Handle protection_domain,
1129 Handle classData, TRAPS) {
1130 assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1131 assert(k->java_mirror() == nullptr, "should only assign mirror once");
1132
1133 // Class_klass has to be loaded because it is used to allocate
1134 // the mirror.
1135 if (vmClasses::Class_klass_loaded()) {
1136 Handle mirror;
1137 Handle comp_mirror;
1138
1139 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1140
1141 // set the classLoader field in the java_lang_Class instance
1142 assert(class_loader() == k->class_loader(), "should be same");
1143 set_class_loader(mirror(), class_loader());
1144
1145 // Setup indirection from klass->mirror
1146 // after any exceptions can happen during allocations.
1147 k->set_java_mirror(mirror);
1148
1149 // Set the module field in the java_lang_Class instance. This must be done
1150 // after the mirror is set.
1151 set_mirror_module_field(THREAD, k, mirror, module);
1152
1153 if (comp_mirror() != nullptr) {
1154 // Set after k->java_mirror() is published, because compiled code running
1155 // concurrently doesn't expect a k to have a null java_mirror.
1156 release_set_array_klass(comp_mirror(), k);
1157 }
1158 if (CDSConfig::is_dumping_heap()) {
1159 if (CDSConfig::is_dumping_protection_domains()) {
1160 create_scratch_mirror(k, protection_domain, CHECK);
1161 } else {
1162 create_scratch_mirror(k, Handle() /* null protection_domain*/, CHECK);
1163 }
1164 }
1165 } else {
1166 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1167 fixup_mirror_list()->push(k);
1168 }
1169 }
1170
1171 #if INCLUDE_CDS_JAVA_HEAP
1172 // The "scratch mirror" stores the states of the mirror object that can be
1173 // decided at dump time (such as the initial values of the static fields, the
1174 // component mirror, etc). At runtime, more information is added to it by
1175 // java_lang_Class::restore_archived_mirror().
1176 //
1177 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1178 // produces the same result as /*runtime*/create_mirror().
1179 //
1180 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1181 // latter may contain dumptime-specific information that cannot be archived
1182 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1183 void java_lang_Class::create_scratch_mirror(Klass* k, Handle protection_domain, TRAPS) {
1184 if (k->class_loader() != nullptr &&
1185 k->class_loader() != SystemDictionary::java_platform_loader() &&
1186 k->class_loader() != SystemDictionary::java_system_loader()) {
1187 // We only archive the mirrors of classes loaded by the built-in loaders
1188 return;
1189 }
1190
1191 Handle classData; // set to null. Will be reinitialized at runtime
1192 Handle mirror;
1193 Handle comp_mirror;
1194 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1195
1196 if (comp_mirror() != nullptr) {
1197 release_set_array_klass(comp_mirror(), k);
1198 }
1199
1200 HeapShared::set_scratch_java_mirror(k, mirror());
1201 }
1202
1203 // Returns true if the mirror is updated, false if no archived mirror
1204 // data is present. After the archived mirror object is restored, the
1205 // shared klass' _has_raw_archived_mirror flag is cleared.
1206 bool java_lang_Class::restore_archived_mirror(Klass *k,
1207 Handle class_loader, Handle module,
1208 Handle protection_domain, TRAPS) {
1209 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1210 // see more details in vmClasses::resolve_all().
1211 if (!vmClasses::Class_klass_loaded()) {
1212 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1213 fixup_mirror_list()->push(k);
1214 return true;
1215 }
1216
1217 oop m = k->archived_java_mirror();
1218 assert(m != nullptr, "must have stored non-null archived mirror");
1219
1220 // Sanity: clear it now to prevent re-initialization if any of the following fails
1221 k->clear_archived_mirror_index();
1222
1223 // mirror is archived, restore
1224 log_debug(aot, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1225 assert(as_Klass(m) == k, "must be");
1226 Handle mirror(THREAD, m);
1227
1228 if (!k->is_array_klass()) {
1229 // - local static final fields with initial values were initialized at dump time
1230
1231 // create the init_lock
1232 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1233 set_init_lock(mirror(), r);
1234
1235 if (protection_domain.not_null()) {
1236 set_protection_domain(mirror(), protection_domain());
1237 }
1238 }
1239
1240 assert(class_loader() == k->class_loader(), "should be same");
1241 if (class_loader.not_null()) {
1242 set_class_loader(mirror(), class_loader());
1243 }
1244
1245 k->set_java_mirror(mirror);
1246
1247 set_mirror_module_field(THREAD, k, mirror, module);
1248
1249 if (log_is_enabled(Trace, aot, heap, mirror)) {
1250 ResourceMark rm(THREAD);
1251 log_trace(aot, heap, mirror)(
1252 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1253 }
1254
1255 return true;
1256 }
1257 #endif // INCLUDE_CDS_JAVA_HEAP
1258
1259 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1260 assert(_module_offset != 0, "must have been computed already");
1261 set_module(k->java_mirror(), module());
1262 }
1263
1264 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1265 assert(_oop_size_offset != 0, "must be set");
1266 assert(size > 0, "Oop size must be greater than zero, not %zu", size);
1267 assert(size <= INT_MAX, "Lossy conversion: %zu", size);
1268 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1269 }
1270
1271 int java_lang_Class::static_oop_field_count(oop java_class) {
1272 assert(_static_oop_field_count_offset != 0, "must be set");
1273 return java_class->int_field(_static_oop_field_count_offset);
1274 }
1275
1276 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1277 assert(_static_oop_field_count_offset != 0, "must be set");
1278 java_class->int_field_put(_static_oop_field_count_offset, size);
1279 }
1280
1281 oop java_lang_Class::protection_domain(oop java_class) {
1282 assert(_protection_domain_offset != 0, "must be set");
1283 return java_class->obj_field(_protection_domain_offset);
1284 }
1285 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1286 assert(_protection_domain_offset != 0, "must be set");
1287 java_class->obj_field_put(_protection_domain_offset, pd);
1288 }
1289
1290 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1291 assert(_component_mirror_offset != 0, "must be set");
1292 assert(java_lang_Class::as_Klass(java_class) != nullptr &&
1293 java_lang_Class::as_Klass(java_class)->is_array_klass(), "must be");
1294 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1295 }
1296
1297 oop java_lang_Class::component_mirror(oop java_class) {
1298 assert(_component_mirror_offset != 0, "must be set");
1299 return java_class->obj_field(_component_mirror_offset);
1300 }
1301
1302 oop java_lang_Class::init_lock(oop java_class) {
1303 assert(_init_lock_offset != 0, "must be set");
1304 return java_class->obj_field(_init_lock_offset);
1305 }
1306 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1307 assert(_init_lock_offset != 0, "must be set");
1308 java_class->obj_field_put(_init_lock_offset, init_lock);
1309 }
1310
1311 objArrayOop java_lang_Class::signers(oop java_class) {
1312 assert(_signers_offset != 0, "must be set");
1313 return (objArrayOop)java_class->obj_field(_signers_offset);
1314 }
1315
1316 oop java_lang_Class::class_data(oop java_class) {
1317 assert(_classData_offset != 0, "must be set");
1318 return java_class->obj_field(_classData_offset);
1319 }
1320 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1321 assert(_classData_offset != 0, "must be set");
1322 java_class->obj_field_put(_classData_offset, class_data);
1323 }
1324
1325 oop java_lang_Class::reflection_data(oop java_class) {
1326 assert(_reflectionData_offset != 0, "must be set");
1327 return java_class->obj_field(_reflectionData_offset);
1328 }
1329
1330 bool java_lang_Class::has_reflection_data(oop java_class) {
1331 return (java_lang_Class::reflection_data(java_class) != nullptr);
1332 }
1333
1334 void java_lang_Class::set_reflection_data(oop java_class, oop reflection_data) {
1335 assert(_reflectionData_offset != 0, "must be set");
1336 java_class->obj_field_put(_reflectionData_offset, reflection_data);
1337 }
1338
1339 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1340 assert(_class_loader_offset != 0, "offsets should have been initialized");
1341 java_class->obj_field_put(_class_loader_offset, loader);
1342 }
1343
1344 oop java_lang_Class::class_loader(oop java_class) {
1345 assert(_class_loader_offset != 0, "must be set");
1346 return java_class->obj_field(_class_loader_offset);
1347 }
1348
1349 oop java_lang_Class::module(oop java_class) {
1350 assert(_module_offset != 0, "must be set");
1351 return java_class->obj_field(_module_offset);
1352 }
1353
1354 void java_lang_Class::set_module(oop java_class, oop module) {
1355 assert(_module_offset != 0, "must be set");
1356 java_class->obj_field_put(_module_offset, module);
1357 }
1358
1359 oop java_lang_Class::name(Handle java_class, TRAPS) {
1360 assert(_name_offset != 0, "must be set");
1361 oop o = java_class->obj_field(_name_offset);
1362 if (o == nullptr) {
1363 o = StringTable::intern(as_external_name(java_class()), THREAD);
1364 java_class->obj_field_put(_name_offset, o);
1365 }
1366 return o;
1367 }
1368
1369 oop java_lang_Class::source_file(oop java_class) {
1370 assert(_source_file_offset != 0, "must be set");
1371 return java_class->obj_field(_source_file_offset);
1372 }
1373
1374 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1375 assert(_source_file_offset != 0, "must be set");
1376 java_class->obj_field_put(_source_file_offset, source_file);
1377 }
1378
1379 void java_lang_Class::set_is_primitive(oop java_class) {
1380 assert(_is_primitive_offset != 0, "must be set");
1381 java_class->bool_field_put(_is_primitive_offset, true);
1382 }
1383
1384
1385 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1386 // Mirrors for basic types have a null klass field, which makes them special.
1387 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1388 if (type != T_VOID) {
1389 Klass* aklass = Universe::typeArrayKlass(type);
1390 assert(aklass != nullptr, "correct bootstrap");
1391 release_set_array_klass(java_class, aklass);
1392 }
1393 #ifdef ASSERT
1394 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1395 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1396 #endif
1397 set_modifiers(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
1398 set_raw_access_flags(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
1399
1400 set_is_primitive(java_class);
1401 return java_class;
1402 }
1403
1404 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1405 assert(is_instance(java_class), "must be a Class object");
1406 java_class->metadata_field_put(_klass_offset, klass);
1407 }
1408
1409
1410 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1411 assert(is_instance(java_class), "must be a Class object");
1412 Symbol* name = nullptr;
1413 bool is_instance = false;
1414 if (is_primitive(java_class)) {
1415 name = vmSymbols::type_signature(primitive_type(java_class));
1416 } else {
1417 Klass* k = as_Klass(java_class);
1418 is_instance = k->is_instance_klass();
1419 name = k->name();
1420 }
1421 if (name == nullptr) {
1422 st->print("<null>");
1423 return;
1424 }
1425 if (is_instance) st->print("L");
1426 st->write((char*) name->base(), (int) name->utf8_length());
1427 if (is_instance) st->print(";");
1428 }
1429
1430 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1431 assert(is_instance(java_class), "must be a Class object");
1432 Symbol* name;
1433 if (is_primitive(java_class)) {
1434 name = vmSymbols::type_signature(primitive_type(java_class));
1435 // Because this can create a new symbol, the caller has to decrement
1436 // the refcount, so make adjustment here and below for symbols returned
1437 // that are not created or incremented due to a successful lookup.
1438 name->increment_refcount();
1439 } else {
1440 Klass* k = as_Klass(java_class);
1441 if (!k->is_instance_klass()) {
1442 name = k->name();
1443 name->increment_refcount();
1444 } else {
1445 ResourceMark rm;
1446 const char* sigstr = k->signature_name();
1447 int siglen = (int) strlen(sigstr);
1448 if (!intern_if_not_found) {
1449 name = SymbolTable::probe(sigstr, siglen);
1450 } else {
1451 name = SymbolTable::new_symbol(sigstr, siglen);
1452 }
1453 }
1454 }
1455 return name;
1456 }
1457
1458 // Returns the Java name for this Java mirror (Resource allocated)
1459 // See Klass::external_name().
1460 // For primitive type Java mirrors, its type name is returned.
1461 const char* java_lang_Class::as_external_name(oop java_class) {
1462 assert(is_instance(java_class), "must be a Class object");
1463 const char* name = nullptr;
1464 if (is_primitive(java_class)) {
1465 name = type2name(primitive_type(java_class));
1466 } else {
1467 name = as_Klass(java_class)->external_name();
1468 }
1469 if (name == nullptr) {
1470 name = "<null>";
1471 }
1472 return name;
1473 }
1474
1475 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1476 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1477 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass");
1478 return k;
1479 }
1480
1481
1482 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1483 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1484 java_class->release_metadata_field_put(_array_klass_offset, klass);
1485 }
1486
1487
1488 BasicType java_lang_Class::primitive_type(oop java_class) {
1489 assert(is_primitive(java_class), "just checking");
1490 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1491 BasicType type = T_VOID;
1492 if (ak != nullptr) {
1493 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1494 type = ArrayKlass::cast(ak)->element_type();
1495 } else {
1496 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1497 }
1498 #ifdef ASSERT
1499 if (CDSConfig::is_dumping_heap()) {
1500 oop mirror = Universe::java_mirror(type);
1501 oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1502 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1503 } else {
1504 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1505 }
1506 #endif
1507 return type;
1508 }
1509
1510 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1511 assert(is_instance(java_class), "must be a Class object");
1512 if (is_primitive(java_class)) {
1513 if (reference_klass != nullptr)
1514 (*reference_klass) = nullptr;
1515 return primitive_type(java_class);
1516 } else {
1517 if (reference_klass != nullptr)
1518 (*reference_klass) = as_Klass(java_class);
1519 return T_OBJECT;
1520 }
1521 }
1522
1523
1524 oop java_lang_Class::primitive_mirror(BasicType t) {
1525 oop mirror = Universe::java_mirror(t);
1526 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1527 assert(is_primitive(mirror), "must be primitive");
1528 return mirror;
1529 }
1530
1531 #define CLASS_FIELDS_DO(macro) \
1532 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1533 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1534 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1535 macro(_module_offset, k, "module", module_signature, false); \
1536 macro(_name_offset, k, "name", string_signature, false); \
1537 macro(_classData_offset, k, "classData", object_signature, false); \
1538 macro(_reflectionData_offset, k, "reflectionData", class_ReflectionData_signature, false); \
1539 macro(_signers_offset, k, "signers", object_array_signature, false); \
1540 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), char_signature, false); \
1541 macro(_raw_access_flags_offset, k, "classFileAccessFlags", char_signature, false); \
1542 macro(_protection_domain_offset, k, "protectionDomain", java_security_ProtectionDomain_signature, false); \
1543 macro(_is_primitive_offset, k, "primitive", bool_signature, false);
1544
1545 void java_lang_Class::compute_offsets() {
1546 if (_offsets_computed) {
1547 return;
1548 }
1549
1550 _offsets_computed = true;
1551
1552 InstanceKlass* k = vmClasses::Class_klass();
1553 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1554 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1555 }
1556
1557 #if INCLUDE_CDS
1558 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1559 f->do_bool(&_offsets_computed);
1560
1561 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1562
1563 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1564 }
1565 #endif
1566
1567 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1568 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1569 return the_class_mirror->int_field(_classRedefinedCount_offset);
1570 }
1571
1572 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1573 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1574 the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1575 }
1576
1577 int java_lang_Class::modifiers(oop the_class_mirror) {
1578 assert(_modifiers_offset != 0, "offsets should have been initialized");
1579 return the_class_mirror->char_field(_modifiers_offset);
1580 }
1581
1582 void java_lang_Class::set_modifiers(oop the_class_mirror, u2 value) {
1583 assert(_modifiers_offset != 0, "offsets should have been initialized");
1584 the_class_mirror->char_field_put(_modifiers_offset, value);
1585 }
1586
1587 int java_lang_Class::raw_access_flags(oop the_class_mirror) {
1588 assert(_raw_access_flags_offset != 0, "offsets should have been initialized");
1589 return the_class_mirror->char_field(_raw_access_flags_offset);
1590 }
1591
1592 void java_lang_Class::set_raw_access_flags(oop the_class_mirror, u2 value) {
1593 assert(_raw_access_flags_offset != 0, "offsets should have been initialized");
1594 the_class_mirror->char_field_put(_raw_access_flags_offset, value);
1595 }
1596
1597
1598 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1599 // platform thread structure, and a eetop offset which was used for thread
1600 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1601 // merged, so in the HotSpot VM we just use the eetop field for the thread
1602 // instead of the privateInfo_offset.
1603 //
1604 // Note: The stackSize field is only present starting in 1.4.
1605
1606 int java_lang_Thread_FieldHolder::_group_offset;
1607 int java_lang_Thread_FieldHolder::_priority_offset;
1608 int java_lang_Thread_FieldHolder::_stackSize_offset;
1609 int java_lang_Thread_FieldHolder::_daemon_offset;
1610 int java_lang_Thread_FieldHolder::_thread_status_offset;
1611
1612 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1613 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1614 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1615 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1616 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1617 macro(_thread_status_offset, k, "threadStatus", int_signature, false)
1618
1619 void java_lang_Thread_FieldHolder::compute_offsets() {
1620 assert(_group_offset == 0, "offsets should be initialized only once");
1621
1622 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1623 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1624 }
1625
1626 #if INCLUDE_CDS
1627 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1628 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1629 }
1630 #endif
1631
1632 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1633 return holder->obj_field(_group_offset);
1634 }
1635
1636 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1637 return (ThreadPriority)holder->int_field(_priority_offset);
1638 }
1639
1640 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1641 holder->int_field_put(_priority_offset, priority);
1642 }
1643
1644 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1645 return holder->long_field(_stackSize_offset);
1646 }
1647
1648 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1649 return holder->bool_field(_daemon_offset) != 0;
1650 }
1651
1652 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1653 assert(val, "daemon status is never turned off");
1654 holder->bool_field_put(_daemon_offset, val);
1655 }
1656
1657 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1658 holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1659 }
1660
1661 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1662 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1663 }
1664
1665
1666 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1667
1668 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1669 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true);
1670
1671 void java_lang_Thread_Constants::compute_offsets() {
1672 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1673
1674 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1675 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1676 }
1677
1678 #if INCLUDE_CDS
1679 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1680 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1681 }
1682 #endif
1683
1684 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1685 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1686 oop base = k->static_field_base_raw();
1687 return base->obj_field(_static_VTHREAD_GROUP_offset);
1688 }
1689
1690
1691 int java_lang_Thread::_holder_offset;
1692 int java_lang_Thread::_name_offset;
1693 int java_lang_Thread::_contextClassLoader_offset;
1694 int java_lang_Thread::_eetop_offset;
1695 int java_lang_Thread::_jvmti_thread_state_offset;
1696 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1697 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1698 int java_lang_Thread::_interrupted_offset;
1699 int java_lang_Thread::_interruptLock_offset;
1700 int java_lang_Thread::_tid_offset;
1701 int java_lang_Thread::_continuation_offset;
1702 int java_lang_Thread::_park_blocker_offset;
1703 int java_lang_Thread::_scopedValueBindings_offset;
1704 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1705
1706 #define THREAD_FIELDS_DO(macro) \
1707 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \
1708 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1709 macro(_contextClassLoader_offset, k, "contextClassLoader", classloader_signature, false); \
1710 macro(_eetop_offset, k, "eetop", long_signature, false); \
1711 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1712 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \
1713 macro(_tid_offset, k, "tid", long_signature, false); \
1714 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1715 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1716 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1717
1718 void java_lang_Thread::compute_offsets() {
1719 assert(_holder_offset == 0, "offsets should be initialized only once");
1720
1721 InstanceKlass* k = vmClasses::Thread_klass();
1722 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1723 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1724 }
1725
1726 #if INCLUDE_CDS
1727 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1728 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1729 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1730 }
1731 #endif
1732
1733 JavaThread* java_lang_Thread::thread(oop java_thread) {
1734 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1735 }
1736
1737 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1738 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1739 }
1740
1741 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1742 java_thread->address_field_put(_eetop_offset, (address)thread);
1743 }
1744
1745 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1746 java_thread->release_address_field_put(_eetop_offset, (address)thread);
1747 }
1748
1749 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1750 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1751 }
1752
1753 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1754 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1755 }
1756
1757 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1758 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1759 }
1760
1761 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1762 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1763 int val = VTMS_transition_disable_count(java_thread);
1764 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1765 }
1766
1767 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1768 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1769 int val = VTMS_transition_disable_count(java_thread);
1770 assert(val > 0, "VTMS_transition_disable_count should never be negative");
1771 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1772 }
1773
1774 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1775 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1776 }
1777
1778 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1779 assert(is_in_VTMS_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside");
1780 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1781 }
1782
1783 int java_lang_Thread::is_in_VTMS_transition_offset() {
1784 return _jvmti_is_in_VTMS_transition_offset;
1785 }
1786
1787 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1788 assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1789 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1790 }
1791
1792 oop java_lang_Thread::holder(oop java_thread) {
1793 // Note: may return null if the thread is still attaching
1794 return java_thread->obj_field(_holder_offset);
1795 }
1796 oop java_lang_Thread::interrupt_lock(oop java_thread) {
1797 return java_thread->obj_field(_interruptLock_offset);
1798 }
1799
1800 bool java_lang_Thread::interrupted(oop java_thread) {
1801 // Make sure the caller can safely access oops.
1802 assert(Thread::current()->is_VM_thread() ||
1803 (JavaThread::current()->thread_state() != _thread_blocked &&
1804 JavaThread::current()->thread_state() != _thread_in_native),
1805 "Unsafe access to oop");
1806 return java_thread->bool_field_volatile(_interrupted_offset);
1807 }
1808
1809 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1810 // Make sure the caller can safely access oops.
1811 assert(Thread::current()->is_VM_thread() ||
1812 (JavaThread::current()->thread_state() != _thread_blocked &&
1813 JavaThread::current()->thread_state() != _thread_in_native),
1814 "Unsafe access to oop");
1815 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1816 }
1817
1818
1819 oop java_lang_Thread::name(oop java_thread) {
1820 return java_thread->obj_field(_name_offset);
1821 }
1822
1823
1824 void java_lang_Thread::set_name(oop java_thread, oop name) {
1825 java_thread->obj_field_put(_name_offset, name);
1826 }
1827
1828 // Convenience macros for setting and getting Thread fields that
1829 // are actually stored in the FieldHolder object of the thread.
1830 // The FieldHolder can be null whilst a thread is attaching via
1831 // JNI, and when the main thread is attaching.
1832
1833 // The default value should be the default/zero initialized value
1834 // of the field as it would be in java.lang.Thread.FieldHolder.
1835 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \
1836 { \
1837 oop holder = java_lang_Thread::holder(java_thread); \
1838 if (holder != nullptr) \
1839 return java_lang_Thread_FieldHolder::field(holder); \
1840 else \
1841 return default_val; \
1842 }
1843
1844 // We should never be trying to set a field of an attaching thread.
1845 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \
1846 { \
1847 oop holder = java_lang_Thread::holder(java_thread); \
1848 assert(holder != nullptr, "Thread not fully initialized"); \
1849 java_lang_Thread_FieldHolder::set_##field(holder, value); \
1850 }
1851
1852
1853 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1854 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1855 }
1856
1857
1858 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1859 SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1860 }
1861
1862
1863 oop java_lang_Thread::threadGroup(oop java_thread) {
1864 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1865 }
1866
1867
1868 bool java_lang_Thread::is_alive(oop java_thread) {
1869 JavaThread* thr = java_lang_Thread::thread(java_thread);
1870 return (thr != nullptr);
1871 }
1872
1873
1874 bool java_lang_Thread::is_daemon(oop java_thread) {
1875 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1876 }
1877
1878
1879 void java_lang_Thread::set_daemon(oop java_thread) {
1880 SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1881 }
1882
1883 oop java_lang_Thread::context_class_loader(oop java_thread) {
1884 return java_thread->obj_field(_contextClassLoader_offset);
1885 }
1886
1887
1888 jlong java_lang_Thread::stackSize(oop java_thread) {
1889 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1890 }
1891
1892 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1893 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1894 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1895 }
1896
1897 // Read thread status value from threadStatus field in java.lang.Thread java class.
1898 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1899 // Make sure the caller is operating on behalf of the VM or is
1900 // running VM code (state == _thread_in_vm).
1901 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1902 JavaThread::current()->thread_state() == _thread_in_vm ||
1903 JavaThread::current() == java_lang_Thread::thread(java_thread),
1904 "unsafe call to java_lang_Thread::get_thread_status()?");
1905 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1906 }
1907
1908 ByteSize java_lang_Thread::thread_id_offset() {
1909 return in_ByteSize(_tid_offset);
1910 }
1911
1912 oop java_lang_Thread::park_blocker(oop java_thread) {
1913 return java_thread->obj_field_access<MO_RELAXED>(_park_blocker_offset);
1914 }
1915
1916 // Obtain stack trace for platform or mounted virtual thread.
1917 // If jthread is a virtual thread and it has been unmounted (or remounted to different carrier) the method returns null.
1918 // The caller (java.lang.VirtualThread) handles returned nulls via retry.
1919 oop java_lang_Thread::async_get_stack_trace(jobject jthread, TRAPS) {
1920 ThreadsListHandle tlh(THREAD);
1921 JavaThread* java_thread = nullptr;
1922 oop thread_oop;
1923
1924 bool has_java_thread = tlh.cv_internal_thread_to_JavaThread(jthread, &java_thread, &thread_oop);
1925 if (!has_java_thread) {
1926 return nullptr;
1927 }
1928
1929 class GetStackTraceHandshakeClosure : public HandshakeClosure {
1930 public:
1931 const Handle _thread_h;
1932 int _depth;
1933 bool _retry_handshake;
1934 GrowableArray<Method*>* _methods;
1935 GrowableArray<int>* _bcis;
1936
1937 GetStackTraceHandshakeClosure(Handle thread_h) :
1938 HandshakeClosure("GetStackTraceHandshakeClosure"), _thread_h(thread_h), _depth(0), _retry_handshake(false),
1939 _methods(nullptr), _bcis(nullptr) {
1940 }
1941 ~GetStackTraceHandshakeClosure() {
1942 delete _methods;
1943 delete _bcis;
1944 }
1945
1946 bool read_reset_retry() {
1947 bool ret = _retry_handshake;
1948 // If we re-execute the handshake this method need to return false
1949 // when the handshake cannot be performed. (E.g. thread terminating)
1950 _retry_handshake = false;
1951 return ret;
1952 }
1953
1954 void do_thread(Thread* th) {
1955 if (!Thread::current()->is_Java_thread()) {
1956 _retry_handshake = true;
1957 return;
1958 }
1959
1960 JavaThread* java_thread = JavaThread::cast(th);
1961
1962 if (!java_thread->has_last_Java_frame()) {
1963 return;
1964 }
1965
1966 bool carrier = false;
1967 if (java_lang_VirtualThread::is_instance(_thread_h())) {
1968 // Ensure _thread_h is still mounted to java_thread.
1969 const ContinuationEntry* ce = java_thread->vthread_continuation();
1970 if (ce == nullptr || ce->cont_oop(java_thread) != java_lang_VirtualThread::continuation(_thread_h())) {
1971 // Target thread has been unmounted.
1972 return;
1973 }
1974 } else {
1975 carrier = (java_thread->vthread_continuation() != nullptr);
1976 }
1977
1978 const int max_depth = MaxJavaStackTraceDepth;
1979 const bool skip_hidden = !ShowHiddenFrames;
1980
1981 // Pick minimum length that will cover most cases
1982 int init_length = 64;
1983 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1984 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
1985
1986 int total_count = 0;
1987 for (vframeStream vfst(java_thread, false, false, carrier); // we don't process frames as we don't care about oops
1988 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
1989 vfst.next()) {
1990
1991 if (skip_hidden && (vfst.method()->is_hidden() ||
1992 vfst.method()->is_continuation_enter_intrinsic())) {
1993 continue;
1994 }
1995
1996 _methods->push(vfst.method());
1997 _bcis->push(vfst.bci());
1998 total_count++;
1999 }
2000
2001 _depth = total_count;
2002 }
2003 };
2004
2005 // Handshake with target
2006 ResourceMark rm(THREAD);
2007 HandleMark hm(THREAD);
2008 GetStackTraceHandshakeClosure gsthc(Handle(THREAD, thread_oop));
2009 do {
2010 Handshake::execute(&gsthc, &tlh, java_thread);
2011 } while (gsthc.read_reset_retry());
2012
2013 // Stop if no stack trace is found.
2014 if (gsthc._depth == 0) {
2015 return nullptr;
2016 }
2017
2018 // Convert to StackTraceElement array
2019 InstanceKlass* k = vmClasses::StackTraceElement_klass();
2020 assert(k != nullptr, "must be loaded in 1.4+");
2021 if (k->should_be_initialized()) {
2022 k->initialize(CHECK_NULL);
2023 }
2024 objArrayHandle trace = oopFactory::new_objArray_handle(k, gsthc._depth, CHECK_NULL);
2025
2026 for (int i = 0; i < gsthc._depth; i++) {
2027 methodHandle method(THREAD, gsthc._methods->at(i));
2028 oop element = java_lang_StackTraceElement::create(method,
2029 gsthc._bcis->at(i),
2030 CHECK_NULL);
2031 trace->obj_at_put(i, element);
2032 }
2033
2034 return trace();
2035 }
2036
2037 const char* java_lang_Thread::thread_status_name(oop java_thread) {
2038 JavaThreadStatus status = get_thread_status(java_thread);
2039 switch (status) {
2040 case JavaThreadStatus::NEW : return "NEW";
2041 case JavaThreadStatus::RUNNABLE : return "RUNNABLE";
2042 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)";
2043 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)";
2044 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
2045 case JavaThreadStatus::PARKED : return "WAITING (parking)";
2046 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)";
2047 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
2048 case JavaThreadStatus::TERMINATED : return "TERMINATED";
2049 default : return "UNKNOWN";
2050 };
2051 }
2052 int java_lang_ThreadGroup::_parent_offset;
2053 int java_lang_ThreadGroup::_name_offset;
2054 int java_lang_ThreadGroup::_maxPriority_offset;
2055 int java_lang_ThreadGroup::_daemon_offset;
2056
2057 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
2058 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2059 return java_thread_group->obj_field(_parent_offset);
2060 }
2061
2062 // ("name as oop" accessor is not necessary)
2063
2064 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
2065 oop name = java_thread_group->obj_field(_name_offset);
2066 // ThreadGroup.name can be null
2067 if (name != nullptr) {
2068 return java_lang_String::as_utf8_string(name);
2069 }
2070 return nullptr;
2071 }
2072
2073 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
2074 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2075 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
2076 }
2077
2078 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
2079 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2080 return java_thread_group->bool_field(_daemon_offset) != 0;
2081 }
2082
2083 #define THREADGROUP_FIELDS_DO(macro) \
2084 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
2085 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
2086 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
2087 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false);
2088
2089 void java_lang_ThreadGroup::compute_offsets() {
2090 assert(_parent_offset == 0, "offsets should be initialized only once");
2091
2092 InstanceKlass* k = vmClasses::ThreadGroup_klass();
2093 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2094 }
2095
2096 #if INCLUDE_CDS
2097 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
2098 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2099 }
2100 #endif
2101
2102
2103 // java_lang_VirtualThread
2104
2105 int java_lang_VirtualThread::static_vthread_scope_offset;
2106 int java_lang_VirtualThread::_carrierThread_offset;
2107 int java_lang_VirtualThread::_continuation_offset;
2108 int java_lang_VirtualThread::_state_offset;
2109 int java_lang_VirtualThread::_next_offset;
2110 int java_lang_VirtualThread::_onWaitingList_offset;
2111 int java_lang_VirtualThread::_notified_offset;
2112 int java_lang_VirtualThread::_timeout_offset;
2113 int java_lang_VirtualThread::_objectWaiter_offset;
2114
2115 #define VTHREAD_FIELDS_DO(macro) \
2116 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \
2117 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \
2118 macro(_continuation_offset, k, "cont", continuation_signature, false); \
2119 macro(_state_offset, k, "state", int_signature, false); \
2120 macro(_next_offset, k, "next", vthread_signature, false); \
2121 macro(_onWaitingList_offset, k, "onWaitingList", bool_signature, false); \
2122 macro(_notified_offset, k, "notified", bool_signature, false); \
2123 macro(_timeout_offset, k, "timeout", long_signature, false);
2124
2125
2126 void java_lang_VirtualThread::compute_offsets() {
2127 InstanceKlass* k = vmClasses::VirtualThread_klass();
2128 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2129 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2130 }
2131
2132 bool java_lang_VirtualThread::is_instance(oop obj) {
2133 return obj != nullptr && is_subclass(obj->klass());
2134 }
2135
2136 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
2137 oop thread = vthread->obj_field(_carrierThread_offset);
2138 return thread;
2139 }
2140
2141 oop java_lang_VirtualThread::continuation(oop vthread) {
2142 oop cont = vthread->obj_field(_continuation_offset);
2143 return cont;
2144 }
2145
2146 int java_lang_VirtualThread::state(oop vthread) {
2147 return vthread->int_field_acquire(_state_offset);
2148 }
2149
2150 void java_lang_VirtualThread::set_state(oop vthread, int state) {
2151 vthread->release_int_field_put(_state_offset, state);
2152 }
2153
2154 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) {
2155 jint* addr = vthread->field_addr<jint>(_state_offset);
2156 int res = Atomic::cmpxchg(addr, old_state, new_state);
2157 return res;
2158 }
2159
2160 oop java_lang_VirtualThread::next(oop vthread) {
2161 return vthread->obj_field(_next_offset);
2162 }
2163
2164 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) {
2165 vthread->obj_field_put(_next_offset, next_vthread);
2166 }
2167
2168 // Add vthread to the waiting list if it's not already in it. Multiple threads
2169 // could be trying to add vthread to the list at the same time, so we control
2170 // access with a cmpxchg on onWaitingList. The winner adds vthread to the list.
2171 // Method returns true if we added vthread to the list, false otherwise.
2172 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) {
2173 jboolean* addr = vthread->field_addr<jboolean>(_onWaitingList_offset);
2174 jboolean vthread_on_list = Atomic::load(addr);
2175 if (!vthread_on_list) {
2176 vthread_on_list = Atomic::cmpxchg(addr, (jboolean)JNI_FALSE, (jboolean)JNI_TRUE);
2177 if (!vthread_on_list) {
2178 for (;;) {
2179 oop head = list_head.resolve();
2180 java_lang_VirtualThread::set_next(vthread, head);
2181 if (list_head.cmpxchg(head, vthread) == head) return true;
2182 }
2183 }
2184 }
2185 return false; // already on waiting list
2186 }
2187
2188 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) {
2189 vthread->bool_field_put_volatile(_notified_offset, value);
2190 }
2191
2192 jlong java_lang_VirtualThread::timeout(oop vthread) {
2193 return vthread->long_field(_timeout_offset);
2194 }
2195
2196 void java_lang_VirtualThread::set_timeout(oop vthread, jlong value) {
2197 vthread->long_field_put(_timeout_offset, value);
2198 }
2199
2200 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2201 JavaThreadStatus status = JavaThreadStatus::NEW;
2202 switch (state & ~SUSPENDED) {
2203 case NEW:
2204 status = JavaThreadStatus::NEW;
2205 break;
2206 case STARTED:
2207 case RUNNING:
2208 case PARKING:
2209 case TIMED_PARKING:
2210 case UNPARKED:
2211 case YIELDING:
2212 case YIELDED:
2213 case UNBLOCKED:
2214 case WAITING:
2215 case TIMED_WAITING:
2216 status = JavaThreadStatus::RUNNABLE;
2217 break;
2218 case PARKED:
2219 case PINNED:
2220 status = JavaThreadStatus::PARKED;
2221 break;
2222 case TIMED_PARKED:
2223 case TIMED_PINNED:
2224 status = JavaThreadStatus::PARKED_TIMED;
2225 break;
2226 case BLOCKING:
2227 case BLOCKED:
2228 status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER;
2229 break;
2230 case WAIT:
2231 status = JavaThreadStatus::IN_OBJECT_WAIT;
2232 break;
2233 case TIMED_WAIT:
2234 status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED;
2235 break;
2236 case TERMINATED:
2237 status = JavaThreadStatus::TERMINATED;
2238 break;
2239 default:
2240 ShouldNotReachHere();
2241 }
2242 return status;
2243 }
2244
2245 ObjectMonitor* java_lang_VirtualThread::current_pending_monitor(oop vthread) {
2246 ObjectWaiter* waiter = objectWaiter(vthread);
2247 if (waiter != nullptr && waiter->at_monitorenter()) {
2248 return waiter->monitor();
2249 }
2250 return nullptr;
2251 }
2252
2253 ObjectMonitor* java_lang_VirtualThread::current_waiting_monitor(oop vthread) {
2254 ObjectWaiter* waiter = objectWaiter(vthread);
2255 if (waiter != nullptr && waiter->is_wait()) {
2256 return waiter->monitor();
2257 }
2258 return nullptr;
2259 }
2260
2261 bool java_lang_VirtualThread::is_preempted(oop vthread) {
2262 oop continuation = java_lang_VirtualThread::continuation(vthread);
2263 assert(continuation != nullptr, "vthread with no continuation");
2264 stackChunkOop chunk = jdk_internal_vm_Continuation::tail(continuation);
2265 return chunk != nullptr && chunk->preempted();
2266 }
2267
2268 #if INCLUDE_CDS
2269 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2270 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2271 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2272 }
2273 #endif
2274
2275 // java_lang_Throwable
2276
2277 int java_lang_Throwable::_backtrace_offset;
2278 int java_lang_Throwable::_detailMessage_offset;
2279 int java_lang_Throwable::_stackTrace_offset;
2280 int java_lang_Throwable::_depth_offset;
2281 int java_lang_Throwable::_cause_offset;
2282 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2283
2284 #define THROWABLE_FIELDS_DO(macro) \
2285 macro(_backtrace_offset, k, "backtrace", object_signature, false); \
2286 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \
2287 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2288 macro(_depth_offset, k, "depth", int_signature, false); \
2289 macro(_cause_offset, k, "cause", throwable_signature, false); \
2290 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2291
2292 void java_lang_Throwable::compute_offsets() {
2293 InstanceKlass* k = vmClasses::Throwable_klass();
2294 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2295 }
2296
2297 #if INCLUDE_CDS
2298 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2299 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2300 }
2301 #endif
2302
2303 oop java_lang_Throwable::unassigned_stacktrace() {
2304 InstanceKlass* ik = vmClasses::Throwable_klass();
2305 oop base = ik->static_field_base_raw();
2306 return base->obj_field(_static_unassigned_stacktrace_offset);
2307 }
2308
2309 oop java_lang_Throwable::backtrace(oop throwable) {
2310 return throwable->obj_field_acquire(_backtrace_offset);
2311 }
2312
2313
2314 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2315 throwable->release_obj_field_put(_backtrace_offset, value);
2316 }
2317
2318 int java_lang_Throwable::depth(oop throwable) {
2319 return throwable->int_field(_depth_offset);
2320 }
2321
2322 void java_lang_Throwable::set_depth(oop throwable, int value) {
2323 throwable->int_field_put(_depth_offset, value);
2324 }
2325
2326 oop java_lang_Throwable::message(oop throwable) {
2327 return throwable->obj_field(_detailMessage_offset);
2328 }
2329
2330 const char* java_lang_Throwable::message_as_utf8(oop throwable) {
2331 oop msg = java_lang_Throwable::message(throwable);
2332 const char* msg_utf8 = nullptr;
2333 if (msg != nullptr) {
2334 msg_utf8 = java_lang_String::as_utf8_string(msg);
2335 }
2336 return msg_utf8;
2337 }
2338
2339 oop java_lang_Throwable::cause(oop throwable) {
2340 return throwable->obj_field(_cause_offset);
2341 }
2342
2343 void java_lang_Throwable::set_message(oop throwable, oop value) {
2344 throwable->obj_field_put(_detailMessage_offset, value);
2345 }
2346
2347
2348 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2349 throwable->obj_field_put(_stackTrace_offset, st_element_array);
2350 }
2351
2352 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2353 set_stacktrace(throwable, nullptr);
2354 }
2355
2356 oop java_lang_Throwable::create_exception_instance(Symbol* class_name, TRAPS) {
2357 Klass* k = SystemDictionary::resolve_or_fail(class_name, true, CHECK_NULL);
2358 return InstanceKlass::cast(k)->allocate_instance(CHECK_NULL);
2359 }
2360
2361 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2362 ResourceMark rm;
2363 Klass* k = throwable->klass();
2364 assert(k != nullptr, "just checking");
2365 st->print("%s", k->external_name());
2366 oop msg = message(throwable);
2367 if (msg != nullptr) {
2368 st->print(": %s", java_lang_String::as_utf8_string(msg));
2369 }
2370 }
2371
2372 // After this many redefines, the stack trace is unreliable.
2373 const int MAX_VERSION = USHRT_MAX;
2374
2375 static inline bool version_matches(Method* method, int version) {
2376 assert(version < MAX_VERSION, "version is too big");
2377 return method != nullptr && (method->constants()->version() == version);
2378 }
2379
2380 // This class provides a simple wrapper over the internal structure of
2381 // exception backtrace to insulate users of the backtrace from needing
2382 // to know what it looks like.
2383 // The code of this class is not GC safe. Allocations can only happen
2384 // in expand().
2385 class BacktraceBuilder: public StackObj {
2386 friend class BacktraceIterator;
2387 private:
2388 Handle _backtrace;
2389 objArrayOop _head;
2390 typeArrayOop _methods;
2391 typeArrayOop _bcis;
2392 objArrayOop _mirrors;
2393 typeArrayOop _names; // Needed to insulate method name against redefinition.
2394 // True if the top frame of the backtrace is omitted because it shall be hidden.
2395 bool _has_hidden_top_frame;
2396 int _index;
2397 NoSafepointVerifier _nsv;
2398
2399 enum {
2400 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2401 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2402 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2403 trace_names_offset = java_lang_Throwable::trace_names_offset,
2404 trace_conts_offset = java_lang_Throwable::trace_conts_offset,
2405 trace_next_offset = java_lang_Throwable::trace_next_offset,
2406 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2407 trace_size = java_lang_Throwable::trace_size,
2408 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2409 };
2410
2411 // get info out of chunks
2412 static typeArrayOop get_methods(objArrayHandle chunk) {
2413 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2414 assert(methods != nullptr, "method array should be initialized in backtrace");
2415 return methods;
2416 }
2417 static typeArrayOop get_bcis(objArrayHandle chunk) {
2418 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2419 assert(bcis != nullptr, "bci array should be initialized in backtrace");
2420 return bcis;
2421 }
2422 static objArrayOop get_mirrors(objArrayHandle chunk) {
2423 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2424 assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2425 return mirrors;
2426 }
2427 static typeArrayOop get_names(objArrayHandle chunk) {
2428 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2429 assert(names != nullptr, "names array should be initialized in backtrace");
2430 return names;
2431 }
2432 static bool has_hidden_top_frame(objArrayHandle chunk) {
2433 oop hidden = chunk->obj_at(trace_hidden_offset);
2434 return hidden != nullptr;
2435 }
2436
2437 public:
2438
2439 // constructor for new backtrace
2440 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2441 expand(CHECK);
2442 _backtrace = Handle(THREAD, _head);
2443 _index = 0;
2444 }
2445
2446 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2447 _methods = get_methods(backtrace);
2448 _bcis = get_bcis(backtrace);
2449 _mirrors = get_mirrors(backtrace);
2450 _names = get_names(backtrace);
2451 _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2452 assert(_methods->length() == _bcis->length() &&
2453 _methods->length() == _mirrors->length() &&
2454 _mirrors->length() == _names->length(),
2455 "method and source information arrays should match");
2456
2457 // head is the preallocated backtrace
2458 _head = backtrace();
2459 _backtrace = Handle(thread, _head);
2460 _index = 0;
2461 }
2462
2463 void expand(TRAPS) {
2464 objArrayHandle old_head(THREAD, _head);
2465 PauseNoSafepointVerifier pnsv(&_nsv);
2466
2467 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2468 objArrayHandle new_head(THREAD, head);
2469
2470 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2471 typeArrayHandle new_methods(THREAD, methods);
2472
2473 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2474 typeArrayHandle new_bcis(THREAD, bcis);
2475
2476 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2477 objArrayHandle new_mirrors(THREAD, mirrors);
2478
2479 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2480 typeArrayHandle new_names(THREAD, names);
2481
2482 if (!old_head.is_null()) {
2483 old_head->obj_at_put(trace_next_offset, new_head());
2484 }
2485 new_head->obj_at_put(trace_methods_offset, new_methods());
2486 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2487 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2488 new_head->obj_at_put(trace_names_offset, new_names());
2489 new_head->obj_at_put(trace_hidden_offset, nullptr);
2490
2491 _head = new_head();
2492 _methods = new_methods();
2493 _bcis = new_bcis();
2494 _mirrors = new_mirrors();
2495 _names = new_names();
2496 _index = 0;
2497 }
2498
2499 oop backtrace() {
2500 return _backtrace();
2501 }
2502
2503 inline void push(Method* method, int bci, TRAPS) {
2504 // Smear the -1 bci to 0 since the array only holds unsigned
2505 // shorts. The later line number lookup would just smear the -1
2506 // to a 0 even if it could be recorded.
2507 if (bci == SynchronizationEntryBCI) bci = 0;
2508
2509 if (_index >= trace_chunk_size) {
2510 methodHandle mhandle(THREAD, method);
2511 expand(CHECK);
2512 method = mhandle();
2513 }
2514
2515 _methods->ushort_at_put(_index, method->orig_method_idnum());
2516 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2517
2518 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2519 // klass owning the symbols alive so their refcounts aren't decremented.
2520 Symbol* name = method->name();
2521 _names->symbol_at_put(_index, name);
2522
2523 // We need to save the mirrors in the backtrace to keep the class
2524 // from being unloaded while we still have this stack trace.
2525 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2526 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2527
2528 _index++;
2529 }
2530
2531 void set_has_hidden_top_frame() {
2532 if (!_has_hidden_top_frame) {
2533 // It would be nice to add java/lang/Boolean::TRUE here
2534 // to indicate that this backtrace has a hidden top frame.
2535 // But this code is used before TRUE is allocated.
2536 // Therefore let's just use an arbitrary legal oop
2537 // available right here. _methods is a short[].
2538 assert(_methods != nullptr, "we need a legal oop");
2539 _has_hidden_top_frame = true;
2540 _head->obj_at_put(trace_hidden_offset, _methods);
2541 }
2542 }
2543 };
2544
2545 struct BacktraceElement : public StackObj {
2546 int _method_id;
2547 int _bci;
2548 int _version;
2549 Symbol* _name;
2550 Handle _mirror;
2551 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2552 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2553 };
2554
2555 class BacktraceIterator : public StackObj {
2556 int _index;
2557 objArrayHandle _result;
2558 objArrayHandle _mirrors;
2559 typeArrayHandle _methods;
2560 typeArrayHandle _bcis;
2561 typeArrayHandle _names;
2562
2563 void init(objArrayHandle result, Thread* thread) {
2564 // Get method id, bci, version and mirror from chunk
2565 _result = result;
2566 if (_result.not_null()) {
2567 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2568 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2569 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2570 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2571 _index = 0;
2572 }
2573 }
2574 public:
2575 BacktraceIterator(objArrayHandle result, Thread* thread) {
2576 init(result, thread);
2577 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2578 }
2579
2580 BacktraceElement next(Thread* thread) {
2581 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2582 _methods->ushort_at(_index),
2583 Backtrace::version_at(_bcis->int_at(_index)),
2584 Backtrace::bci_at(_bcis->int_at(_index)),
2585 _names->symbol_at(_index));
2586 _index++;
2587
2588 if (_index >= java_lang_Throwable::trace_chunk_size) {
2589 int next_offset = java_lang_Throwable::trace_next_offset;
2590 // Get next chunk
2591 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2592 init(result, thread);
2593 }
2594 return e;
2595 }
2596
2597 bool repeat() {
2598 return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2599 }
2600 };
2601
2602
2603 // Print stack trace element to resource allocated buffer
2604 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2605 int version, int bci, Symbol* name) {
2606 ResourceMark rm;
2607
2608 // Get strings and string lengths
2609 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2610 const char* klass_name = holder->external_name();
2611 int buf_len = (int)strlen(klass_name);
2612
2613 char* method_name = name->as_C_string();
2614 buf_len += (int)strlen(method_name);
2615
2616 char* source_file_name = nullptr;
2617 Symbol* source = Backtrace::get_source_file_name(holder, version);
2618 if (source != nullptr) {
2619 source_file_name = source->as_C_string();
2620 buf_len += (int)strlen(source_file_name);
2621 }
2622
2623 char *module_name = nullptr, *module_version = nullptr;
2624 ModuleEntry* module = holder->module();
2625 if (module->is_named()) {
2626 module_name = module->name()->as_C_string();
2627 buf_len += (int)strlen(module_name);
2628 if (module->version() != nullptr) {
2629 module_version = module->version()->as_C_string();
2630 buf_len += (int)strlen(module_version);
2631 }
2632 }
2633
2634 // Allocate temporary buffer with extra space for formatting and line number
2635 const size_t buf_size = buf_len + 64;
2636 char* buf = NEW_RESOURCE_ARRAY(char, buf_size);
2637
2638 // Print stack trace line in buffer
2639 int buf_off = os::snprintf(buf, buf_size, "\tat %s.%s(", klass_name, method_name);
2640 assert(static_cast<size_t>(buf_off) < buf_size, "buffer is wrong size");
2641 // Print module information
2642 if (module_name != nullptr) {
2643 if (module_version != nullptr) {
2644 buf_off += os::snprintf(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version);
2645 assert(static_cast<size_t>(buf_off) < buf_size, "buffer is wrong size");
2646 } else {
2647 buf_off += os::snprintf(buf + buf_off, buf_size - buf_off, "%s/", module_name);
2648 assert(static_cast<size_t>(buf_off) < buf_size, "buffer is wrong size");
2649 }
2650 }
2651
2652 // The method can be null if the requested class version is gone
2653 Method* method = holder->method_with_orig_idnum(method_id, version);
2654 if (!version_matches(method, version)) {
2655 strcat(buf, "Redefined)");
2656 } else {
2657 int line_number = Backtrace::get_line_number(method, bci);
2658 if (line_number == -2) {
2659 strcat(buf, "Native Method)");
2660 } else {
2661 if (source_file_name != nullptr && (line_number != -1)) {
2662 // Sourcename and linenumber
2663 buf_off += os::snprintf(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number);
2664 assert(static_cast<size_t>(buf_off) < buf_size, "buffer is wrong size");
2665 } else if (source_file_name != nullptr) {
2666 // Just sourcename
2667 buf_off += os::snprintf(buf + buf_off, buf_size - buf_off, "%s)", source_file_name);
2668 assert(static_cast<size_t>(buf_off) < buf_size, "buffer is wrong size");
2669 } else {
2670 // Neither sourcename nor linenumber
2671 buf_off += os::snprintf(buf + buf_off, buf_size - buf_off, "Unknown Source)");
2672 assert(static_cast<size_t>(buf_off) < buf_size, "buffer is wrong size");
2673 }
2674 nmethod* nm = method->code();
2675 if (WizardMode && nm != nullptr) {
2676 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2677 }
2678 }
2679 }
2680
2681 st->print_cr("%s", buf);
2682 }
2683
2684 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2685 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2686 int method_id = method->orig_method_idnum();
2687 int version = method->constants()->version();
2688 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2689 }
2690
2691 /**
2692 * Print the throwable message and its stack trace plus all causes by walking the
2693 * cause chain. The output looks the same as of Throwable.printStackTrace().
2694 */
2695 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2696 // First, print the message.
2697 print(throwable(), st);
2698 st->cr();
2699
2700 // Now print the stack trace.
2701 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2702 while (throwable.not_null()) {
2703 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2704 if (result.is_null()) {
2705 st->print_raw_cr("\t<<no stack trace available>>");
2706 return;
2707 }
2708 BacktraceIterator iter(result, THREAD);
2709
2710 while (iter.repeat()) {
2711 BacktraceElement bte = iter.next(THREAD);
2712 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2713 }
2714 if (THREAD->can_call_java()) {
2715 // Call getCause() which doesn't necessarily return the _cause field.
2716 ExceptionMark em(THREAD);
2717 JavaValue cause(T_OBJECT);
2718 JavaCalls::call_virtual(&cause,
2719 throwable,
2720 throwable->klass(),
2721 vmSymbols::getCause_name(),
2722 vmSymbols::void_throwable_signature(),
2723 THREAD);
2724 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2725 if (HAS_PENDING_EXCEPTION) {
2726 CLEAR_PENDING_EXCEPTION;
2727 throwable = Handle();
2728 } else {
2729 throwable = Handle(THREAD, cause.get_oop());
2730 if (throwable.not_null()) {
2731 st->print("Caused by: ");
2732 print(throwable(), st);
2733 st->cr();
2734 }
2735 }
2736 } else {
2737 st->print_raw_cr("<<cannot call Java to get cause>>");
2738 return;
2739 }
2740 }
2741 }
2742
2743 /**
2744 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2745 */
2746 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2747 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2748 JavaValue result(T_VOID);
2749 JavaCalls::call_virtual(&result,
2750 throwable,
2751 vmClasses::Throwable_klass(),
2752 vmSymbols::printStackTrace_name(),
2753 vmSymbols::void_method_signature(),
2754 THREAD);
2755 }
2756
2757 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2758 if (!StackTraceInThrowable) return;
2759 ResourceMark rm(THREAD);
2760
2761 // Start out by clearing the backtrace for this object, in case the VM
2762 // runs out of memory while allocating the stack trace
2763 set_backtrace(throwable(), nullptr);
2764 // Clear lazily constructed Java level stacktrace if refilling occurs
2765 // This is unnecessary in 1.7+ but harmless
2766 clear_stacktrace(throwable());
2767
2768 int max_depth = MaxJavaStackTraceDepth;
2769 JavaThread* thread = THREAD;
2770
2771 BacktraceBuilder bt(CHECK);
2772
2773 // If there is no Java frame just return the method that was being called
2774 // with bci 0
2775 if (!thread->has_last_Java_frame()) {
2776 if (max_depth >= 1 && method() != nullptr) {
2777 bt.push(method(), 0, CHECK);
2778 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2779 set_depth(throwable(), 1);
2780 set_backtrace(throwable(), bt.backtrace());
2781 }
2782 return;
2783 }
2784
2785 // Instead of using vframe directly, this version of fill_in_stack_trace
2786 // basically handles everything by hand. This significantly improved the
2787 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2788 // See bug 6333838 for more details.
2789 // The "ASSERT" here is to verify this method generates the exactly same stack
2790 // trace as utilizing vframe.
2791 #ifdef ASSERT
2792 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2793 #endif
2794 int total_count = 0;
2795 RegisterMap map(thread,
2796 RegisterMap::UpdateMap::skip,
2797 RegisterMap::ProcessFrames::skip,
2798 RegisterMap::WalkContinuation::include);
2799 int decode_offset = 0;
2800 nmethod* nm = nullptr;
2801 bool skip_fillInStackTrace_check = false;
2802 bool skip_throwableInit_check = false;
2803 bool skip_hidden = !ShowHiddenFrames;
2804 bool show_carrier = ShowCarrierFrames;
2805 ContinuationEntry* cont_entry = thread->last_continuation();
2806 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2807 Method* method = nullptr;
2808 int bci = 0;
2809
2810 // Compiled java method case.
2811 if (decode_offset != 0) {
2812 DebugInfoReadStream stream(nm, decode_offset);
2813 decode_offset = stream.read_int();
2814 method = (Method*)nm->metadata_at(stream.read_int());
2815 bci = stream.read_bci();
2816 } else {
2817 if (fr.is_first_frame()) break;
2818
2819 if (Continuation::is_continuation_enterSpecial(fr)) {
2820 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2821 if (!show_carrier && cont_entry->is_virtual_thread()) {
2822 break;
2823 }
2824 cont_entry = cont_entry->parent();
2825 }
2826
2827 address pc = fr.pc();
2828 if (fr.is_interpreted_frame()) {
2829 address bcp;
2830 if (!map.in_cont()) {
2831 bcp = fr.interpreter_frame_bcp();
2832 method = fr.interpreter_frame_method();
2833 } else {
2834 bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2835 method = map.stack_chunk()->interpreter_frame_method(fr);
2836 }
2837 bci = method->bci_from(bcp);
2838 fr = fr.sender(&map);
2839 } else {
2840 CodeBlob* cb = fr.cb();
2841 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2842 // but non nmethod
2843 fr = fr.sender(&map);
2844 if (cb == nullptr || !cb->is_nmethod()) {
2845 continue;
2846 }
2847 nm = cb->as_nmethod();
2848 assert(nm->method() != nullptr, "must be");
2849 if (nm->method()->is_native()) {
2850 method = nm->method();
2851 bci = 0;
2852 } else {
2853 PcDesc* pd = nm->pc_desc_at(pc);
2854 decode_offset = pd->scope_decode_offset();
2855 // if decode_offset is not equal to 0, it will execute the
2856 // "compiled java method case" at the beginning of the loop.
2857 continue;
2858 }
2859 }
2860 }
2861 #ifdef ASSERT
2862 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2863 assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2864 st.next();
2865 }
2866 #endif
2867
2868 // the format of the stacktrace will be:
2869 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2870 // - 0 or more <init> methods for the exception class (skipped)
2871 // - rest of the stack
2872
2873 if (!skip_fillInStackTrace_check) {
2874 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2875 throwable->is_a(method->method_holder())) {
2876 continue;
2877 }
2878 else {
2879 skip_fillInStackTrace_check = true; // gone past them all
2880 }
2881 }
2882 if (!skip_throwableInit_check) {
2883 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2884
2885 // skip <init> methods of the exception class and superclasses
2886 // This is similar to classic VM.
2887 if (method->name() == vmSymbols::object_initializer_name() &&
2888 throwable->is_a(method->method_holder())) {
2889 continue;
2890 } else {
2891 // there are none or we've seen them all - either way stop checking
2892 skip_throwableInit_check = true;
2893 }
2894 }
2895 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2896 if (skip_hidden) {
2897 if (total_count == 0) {
2898 // The top frame will be hidden from the stack trace.
2899 bt.set_has_hidden_top_frame();
2900 }
2901 continue;
2902 }
2903 }
2904
2905 bt.push(method, bci, CHECK);
2906 total_count++;
2907 }
2908
2909 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2910
2911 // Put completed stack trace into throwable object
2912 set_backtrace(throwable(), bt.backtrace());
2913 set_depth(throwable(), total_count);
2914 }
2915
2916 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2917 // No-op if stack trace is disabled
2918 if (!StackTraceInThrowable) {
2919 return;
2920 }
2921
2922 // Disable stack traces for some preallocated out of memory errors
2923 if (!Universe::should_fill_in_stack_trace(throwable)) {
2924 return;
2925 }
2926
2927 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2928 PreserveExceptionMark pm(THREAD);
2929
2930 fill_in_stack_trace(throwable, method, THREAD);
2931 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2932 // original exception via the PreserveExceptionMark destructor.
2933 CLEAR_PENDING_EXCEPTION;
2934 }
2935
2936 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2937 // Allocate stack trace - backtrace is created but not filled in
2938
2939 // No-op if stack trace is disabled
2940 if (!StackTraceInThrowable) return;
2941 BacktraceBuilder bt(CHECK); // creates a backtrace
2942 set_backtrace(throwable(), bt.backtrace());
2943 }
2944
2945
2946 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2947 // Fill in stack trace into preallocated backtrace (no GC)
2948
2949 // No-op if stack trace is disabled
2950 if (!StackTraceInThrowable) return;
2951
2952 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2953
2954 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2955
2956 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2957 assert(backtrace.not_null(), "backtrace should have been preallocated");
2958
2959 ResourceMark rm(THREAD);
2960 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2961
2962 BacktraceBuilder bt(THREAD, backtrace);
2963
2964 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2965 // methods as preallocated errors aren't created by "java" code.
2966
2967 // fill in as much stack trace as possible
2968 int chunk_count = 0;
2969 for (;!st.at_end(); st.next()) {
2970 bt.push(st.method(), st.bci(), CHECK);
2971 chunk_count++;
2972
2973 // Bail-out for deep stacks
2974 if (chunk_count >= trace_chunk_size) break;
2975 }
2976 set_depth(throwable(), chunk_count);
2977 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2978
2979 // We support the Throwable immutability protocol defined for Java 7.
2980 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2981 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2982 }
2983
2984 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2985 objArrayHandle stack_trace_array_h, TRAPS) {
2986
2987 if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2988 THROW(vmSymbols::java_lang_NullPointerException());
2989 }
2990
2991 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2992
2993 if (stack_trace_array_h->length() != depth) {
2994 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2995 }
2996
2997 objArrayHandle result(THREAD, objArrayOop(backtrace()));
2998 BacktraceIterator iter(result, THREAD);
2999
3000 int index = 0;
3001 while (iter.repeat()) {
3002 BacktraceElement bte = iter.next(THREAD);
3003
3004 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
3005
3006 if (stack_trace_element.is_null()) {
3007 THROW(vmSymbols::java_lang_NullPointerException());
3008 }
3009
3010 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
3011 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
3012
3013 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
3014 method,
3015 bte._version,
3016 bte._bci,
3017 bte._name,
3018 CHECK);
3019 }
3020 }
3021
3022 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
3023 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
3024 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
3025 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
3026 // symbolic stacktrace of 'throwable'.
3027 assert(throwable.not_null(), "shouldn't be");
3028
3029 // Now create the message from the original exception and thread name.
3030 ResourceMark rm(current);
3031 const char *message = nullptr;
3032 oop detailed_message = java_lang_Throwable::message(throwable());
3033 if (detailed_message != nullptr) {
3034 message = java_lang_String::as_utf8_string(detailed_message);
3035 }
3036 stringStream st;
3037 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
3038 message == nullptr ? "" : ":");
3039 if (message == nullptr) {
3040 st.print("[in thread \"%s\"]", current->name());
3041 } else {
3042 st.print("%s [in thread \"%s\"]", message, current->name());
3043 }
3044
3045 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
3046 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
3047 // If new_exception returns a different exception while creating the exception,
3048 // abandon the attempt to save the initialization error and return null.
3049 if (init_error->klass()->name() != exception_name) {
3050 log_info(class, init)("Exception %s thrown while saving initialization exception",
3051 init_error->klass()->external_name());
3052 return Handle();
3053 }
3054
3055 // Call to java to fill in the stack trace and clear declaringClassObject to
3056 // not keep classes alive in the stack trace.
3057 // call this: public StackTraceElement[] getStackTrace()
3058 JavaValue result(T_ARRAY);
3059 JavaCalls::call_virtual(&result, throwable,
3060 vmClasses::Throwable_klass(),
3061 vmSymbols::getStackTrace_name(),
3062 vmSymbols::getStackTrace_signature(),
3063 current);
3064 if (!current->has_pending_exception()){
3065 Handle stack_trace(current, result.get_oop());
3066 assert(stack_trace->is_objArray(), "Should be an array");
3067 java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
3068 // Clear backtrace because the stacktrace should be used instead.
3069 set_backtrace(init_error(), nullptr);
3070 } else {
3071 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
3072 init_error->klass()->external_name());
3073 current->clear_pending_exception();
3074 }
3075
3076 return init_error;
3077 }
3078
3079 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
3080 JavaThread* current = JavaThread::current();
3081 objArrayHandle result(current, objArrayOop(backtrace(throwable)));
3082 BacktraceIterator iter(result, current);
3083 // No backtrace available.
3084 if (!iter.repeat()) return false;
3085
3086 // If the exception happened in a frame that has been hidden, i.e.,
3087 // omitted from the back trace, we can not compute the message.
3088 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
3089 if (hidden != nullptr) {
3090 return false;
3091 }
3092
3093 // Get first backtrace element.
3094 BacktraceElement bte = iter.next(current);
3095
3096 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
3097 assert(holder != nullptr, "first element should be non-null");
3098 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
3099
3100 // Original version is no longer available.
3101 if (m == nullptr || !version_matches(m, bte._version)) {
3102 return false;
3103 }
3104
3105 *method = m;
3106 *bci = bte._bci;
3107 return true;
3108 }
3109
3110 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
3111 // Allocate java.lang.StackTraceElement instance
3112 InstanceKlass* k = vmClasses::StackTraceElement_klass();
3113 assert(k != nullptr, "must be loaded in 1.4+");
3114 if (k->should_be_initialized()) {
3115 k->initialize(CHECK_NULL);
3116 }
3117
3118 Handle element = k->allocate_instance_handle(CHECK_NULL);
3119
3120 int version = method->constants()->version();
3121 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
3122 return element();
3123 }
3124
3125 void java_lang_StackTraceElement::fill_in(Handle element,
3126 InstanceKlass* holder, const methodHandle& method,
3127 int version, int bci, Symbol* name, TRAPS) {
3128 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
3129
3130 ResourceMark rm(THREAD);
3131 HandleMark hm(THREAD);
3132
3133 // Fill in class name
3134 Handle java_class(THREAD, holder->java_mirror());
3135 oop classname = java_lang_Class::name(java_class, CHECK);
3136 java_lang_StackTraceElement::set_declaringClass(element(), classname);
3137 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
3138
3139 oop loader = holder->class_loader();
3140 if (loader != nullptr) {
3141 oop loader_name = java_lang_ClassLoader::name(loader);
3142 if (loader_name != nullptr)
3143 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
3144 }
3145
3146 // Fill in method name
3147 oop methodname = StringTable::intern(name, CHECK);
3148 java_lang_StackTraceElement::set_methodName(element(), methodname);
3149
3150 // Fill in module name and version
3151 ModuleEntry* module = holder->module();
3152 if (module->is_named()) {
3153 oop module_name = StringTable::intern(module->name(), CHECK);
3154 java_lang_StackTraceElement::set_moduleName(element(), module_name);
3155 oop module_version;
3156 if (module->version() != nullptr) {
3157 module_version = StringTable::intern(module->version(), CHECK);
3158 } else {
3159 module_version = nullptr;
3160 }
3161 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
3162 }
3163
3164 if (method() == nullptr || !version_matches(method(), version)) {
3165 // The method was redefined, accurate line number information isn't available
3166 java_lang_StackTraceElement::set_fileName(element(), nullptr);
3167 java_lang_StackTraceElement::set_lineNumber(element(), -1);
3168 } else {
3169 Symbol* source;
3170 oop source_file;
3171 int line_number;
3172 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
3173
3174 java_lang_StackTraceElement::set_fileName(element(), source_file);
3175 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
3176 }
3177 }
3178
3179 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
3180 InstanceKlass* holder,
3181 int version,
3182 const methodHandle& method,
3183 int bci,
3184 Symbol*& source,
3185 oop& source_file,
3186 int& line_number, TRAPS) {
3187 // Fill in source file name and line number.
3188 source = Backtrace::get_source_file_name(holder, version);
3189 source_file = java_lang_Class::source_file(java_class());
3190 if (source != nullptr) {
3191 // Class was not redefined. We can trust its cache if set,
3192 // else we have to initialize it.
3193 if (source_file == nullptr) {
3194 source_file = StringTable::intern(source, CHECK);
3195 java_lang_Class::set_source_file(java_class(), source_file);
3196 }
3197 } else {
3198 // Class was redefined. Dump the cache if it was set.
3199 if (source_file != nullptr) {
3200 source_file = nullptr;
3201 java_lang_Class::set_source_file(java_class(), source_file);
3202 }
3203 }
3204 line_number = Backtrace::get_line_number(method(), bci);
3205 }
3206
3207 #if INCLUDE_JVMCI
3208 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
3209 Symbol*& filename, int& line_number, TRAPS) {
3210 ResourceMark rm(THREAD);
3211 HandleMark hm(THREAD);
3212
3213 filename = nullptr;
3214 line_number = -1;
3215
3216 oop source_file;
3217 int version = method->constants()->version();
3218 InstanceKlass* holder = method->method_holder();
3219 Handle java_class(THREAD, holder->java_mirror());
3220 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
3221 }
3222 #endif // INCLUDE_JVMCI
3223
3224 // java_lang_ClassFrameInfo
3225
3226 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
3227 int java_lang_ClassFrameInfo::_flags_offset;
3228
3229 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
3230 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \
3231 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false)
3232
3233 void java_lang_ClassFrameInfo::compute_offsets() {
3234 InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
3235 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3236 }
3237
3238 #if INCLUDE_CDS
3239 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
3240 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3241 }
3242 #endif
3243
3244 static int get_flags(const methodHandle& m) {
3245 int flags = m->access_flags().as_method_flags();
3246 if (m->is_object_initializer()) {
3247 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR;
3248 } else {
3249 // Note: Static initializers can be here. Record them as plain methods.
3250 flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
3251 }
3252 if (m->caller_sensitive()) {
3253 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
3254 }
3255 if (m->is_hidden()) {
3256 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3257 }
3258 assert((flags & 0xFF000000) == 0, "unexpected flags");
3259 return flags;
3260 }
3261
3262 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3263 return obj->obj_field(_classOrMemberName_offset);
3264 }
3265
3266 int java_lang_ClassFrameInfo::flags(oop obj) {
3267 return obj->int_field(_flags_offset);
3268 }
3269
3270 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3271 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3272 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3273 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3274 stackFrame->int_field_put(_flags_offset, flags);
3275 }
3276
3277 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3278 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3279 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3280 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3281 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3282 stackFrame->int_field_put(_flags_offset, flags);
3283 }
3284
3285
3286 // java_lang_StackFrameInfo
3287
3288 int java_lang_StackFrameInfo::_type_offset;
3289 int java_lang_StackFrameInfo::_name_offset;
3290 int java_lang_StackFrameInfo::_bci_offset;
3291 int java_lang_StackFrameInfo::_version_offset;
3292 int java_lang_StackFrameInfo::_contScope_offset;
3293
3294 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3295 macro(_type_offset, k, "type", object_signature, false); \
3296 macro(_name_offset, k, "name", string_signature, false); \
3297 macro(_bci_offset, k, "bci", int_signature, false); \
3298 macro(_contScope_offset, k, "contScope", continuationscope_signature, false)
3299
3300 void java_lang_StackFrameInfo::compute_offsets() {
3301 InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3302 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3303 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3304 }
3305
3306 #if INCLUDE_CDS
3307 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3308 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3309 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3310 }
3311 #endif
3312
3313 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3314 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3315 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3316 return method;
3317 }
3318
3319 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3320 // set Method* or mid/cpref
3321 HandleMark hm(THREAD);
3322 Handle cont_h(THREAD, cont);
3323 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3324
3325 // set bci
3326 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3327 // method may be redefined; store the version
3328 int version = method->constants()->version();
3329 assert((jushort)version == version, "version should be short");
3330 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3331
3332 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3333 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3334 }
3335
3336 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3337 ResourceMark rm(THREAD);
3338 HandleMark hm(THREAD);
3339
3340 Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3341 InstanceKlass* holder = method->method_holder();
3342 short version = stackFrame->short_field(_version_offset);
3343 int bci = stackFrame->int_field(_bci_offset);
3344 Symbol* name = method->name();
3345 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3346 }
3347
3348 oop java_lang_StackFrameInfo::type(oop obj) {
3349 return obj->obj_field(_type_offset);
3350 }
3351
3352 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3353 obj->obj_field_put(_type_offset, value);
3354 }
3355
3356 oop java_lang_StackFrameInfo::name(oop obj) {
3357 return obj->obj_field(_name_offset);
3358 }
3359
3360 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3361 obj->obj_field_put(_name_offset, value);
3362 }
3363
3364 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3365 obj->short_field_put(_version_offset, value);
3366 }
3367
3368 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3369 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3370 obj->int_field_put(_bci_offset, value);
3371 }
3372
3373 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3374 obj->obj_field_put(_contScope_offset, value);
3375 }
3376
3377 int java_lang_LiveStackFrameInfo::_monitors_offset;
3378 int java_lang_LiveStackFrameInfo::_locals_offset;
3379 int java_lang_LiveStackFrameInfo::_operands_offset;
3380 int java_lang_LiveStackFrameInfo::_mode_offset;
3381
3382 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3383 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
3384 macro(_locals_offset, k, "locals", object_array_signature, false); \
3385 macro(_operands_offset, k, "operands", object_array_signature, false); \
3386 macro(_mode_offset, k, "mode", int_signature, false)
3387
3388 void java_lang_LiveStackFrameInfo::compute_offsets() {
3389 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3390 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3391 }
3392
3393 #if INCLUDE_CDS
3394 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3395 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3396 }
3397 #endif
3398
3399 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3400 obj->obj_field_put(_monitors_offset, value);
3401 }
3402
3403 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3404 obj->obj_field_put(_locals_offset, value);
3405 }
3406
3407 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3408 obj->obj_field_put(_operands_offset, value);
3409 }
3410
3411 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3412 obj->int_field_put(_mode_offset, value);
3413 }
3414
3415
3416 // java_lang_AccessibleObject
3417
3418 int java_lang_reflect_AccessibleObject::_override_offset;
3419
3420 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3421 macro(_override_offset, k, "override", bool_signature, false)
3422
3423 void java_lang_reflect_AccessibleObject::compute_offsets() {
3424 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3425 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3426 }
3427
3428 #if INCLUDE_CDS
3429 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3430 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3431 }
3432 #endif
3433
3434 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3435 return (jboolean) reflect->bool_field(_override_offset);
3436 }
3437
3438 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3439 reflect->bool_field_put(_override_offset, (int) value);
3440 }
3441
3442 // java_lang_reflect_Method
3443
3444 int java_lang_reflect_Method::_clazz_offset;
3445 int java_lang_reflect_Method::_name_offset;
3446 int java_lang_reflect_Method::_returnType_offset;
3447 int java_lang_reflect_Method::_parameterTypes_offset;
3448 int java_lang_reflect_Method::_exceptionTypes_offset;
3449 int java_lang_reflect_Method::_slot_offset;
3450 int java_lang_reflect_Method::_modifiers_offset;
3451 int java_lang_reflect_Method::_signature_offset;
3452 int java_lang_reflect_Method::_annotations_offset;
3453 int java_lang_reflect_Method::_parameter_annotations_offset;
3454 int java_lang_reflect_Method::_annotation_default_offset;
3455
3456 #define METHOD_FIELDS_DO(macro) \
3457 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3458 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3459 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
3460 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3461 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3462 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3463 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3464 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3465 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3466 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3467 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
3468
3469 void java_lang_reflect_Method::compute_offsets() {
3470 InstanceKlass* k = vmClasses::reflect_Method_klass();
3471 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3472 }
3473
3474 #if INCLUDE_CDS
3475 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3476 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3477 }
3478 #endif
3479
3480 Handle java_lang_reflect_Method::create(TRAPS) {
3481 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3482 Klass* klass = vmClasses::reflect_Method_klass();
3483 // This class is eagerly initialized during VM initialization, since we keep a reference
3484 // to one of the methods
3485 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
3486 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
3487 }
3488
3489 oop java_lang_reflect_Method::clazz(oop reflect) {
3490 return reflect->obj_field(_clazz_offset);
3491 }
3492
3493 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3494 reflect->obj_field_put(_clazz_offset, value);
3495 }
3496
3497 int java_lang_reflect_Method::slot(oop reflect) {
3498 return reflect->int_field(_slot_offset);
3499 }
3500
3501 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3502 reflect->int_field_put(_slot_offset, value);
3503 }
3504
3505 void java_lang_reflect_Method::set_name(oop method, oop value) {
3506 method->obj_field_put(_name_offset, value);
3507 }
3508
3509 oop java_lang_reflect_Method::return_type(oop method) {
3510 return method->obj_field(_returnType_offset);
3511 }
3512
3513 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3514 method->obj_field_put(_returnType_offset, value);
3515 }
3516
3517 oop java_lang_reflect_Method::parameter_types(oop method) {
3518 return method->obj_field(_parameterTypes_offset);
3519 }
3520
3521 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3522 method->obj_field_put(_parameterTypes_offset, value);
3523 }
3524
3525 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3526 method->obj_field_put(_exceptionTypes_offset, value);
3527 }
3528
3529 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3530 method->int_field_put(_modifiers_offset, value);
3531 }
3532
3533 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3534 method->obj_field_put(_signature_offset, value);
3535 }
3536
3537 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3538 method->obj_field_put(_annotations_offset, value);
3539 }
3540
3541 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3542 method->obj_field_put(_parameter_annotations_offset, value);
3543 }
3544
3545 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3546 method->obj_field_put(_annotation_default_offset, value);
3547 }
3548
3549 int java_lang_reflect_Constructor::_clazz_offset;
3550 int java_lang_reflect_Constructor::_parameterTypes_offset;
3551 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3552 int java_lang_reflect_Constructor::_slot_offset;
3553 int java_lang_reflect_Constructor::_modifiers_offset;
3554 int java_lang_reflect_Constructor::_signature_offset;
3555 int java_lang_reflect_Constructor::_annotations_offset;
3556 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3557
3558 #define CONSTRUCTOR_FIELDS_DO(macro) \
3559 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3560 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3561 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3562 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3563 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3564 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3565 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3566 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3567
3568 void java_lang_reflect_Constructor::compute_offsets() {
3569 InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3570 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3571 }
3572
3573 #if INCLUDE_CDS
3574 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3575 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3576 }
3577 #endif
3578
3579 Handle java_lang_reflect_Constructor::create(TRAPS) {
3580 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3581 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3582 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3583 InstanceKlass* ik = InstanceKlass::cast(k);
3584 // Ensure it is initialized
3585 ik->initialize(CHECK_NH);
3586 return ik->allocate_instance_handle(THREAD);
3587 }
3588
3589 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3590 return reflect->obj_field(_clazz_offset);
3591 }
3592
3593 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3594 reflect->obj_field_put(_clazz_offset, value);
3595 }
3596
3597 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3598 return constructor->obj_field(_parameterTypes_offset);
3599 }
3600
3601 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3602 constructor->obj_field_put(_parameterTypes_offset, value);
3603 }
3604
3605 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3606 constructor->obj_field_put(_exceptionTypes_offset, value);
3607 }
3608
3609 int java_lang_reflect_Constructor::slot(oop reflect) {
3610 return reflect->int_field(_slot_offset);
3611 }
3612
3613 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3614 reflect->int_field_put(_slot_offset, value);
3615 }
3616
3617 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3618 constructor->int_field_put(_modifiers_offset, value);
3619 }
3620
3621 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3622 constructor->obj_field_put(_signature_offset, value);
3623 }
3624
3625 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3626 constructor->obj_field_put(_annotations_offset, value);
3627 }
3628
3629 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3630 method->obj_field_put(_parameter_annotations_offset, value);
3631 }
3632
3633 int java_lang_reflect_Field::_clazz_offset;
3634 int java_lang_reflect_Field::_name_offset;
3635 int java_lang_reflect_Field::_type_offset;
3636 int java_lang_reflect_Field::_slot_offset;
3637 int java_lang_reflect_Field::_modifiers_offset;
3638 int java_lang_reflect_Field::_trusted_final_offset;
3639 int java_lang_reflect_Field::_signature_offset;
3640 int java_lang_reflect_Field::_annotations_offset;
3641
3642 #define FIELD_FIELDS_DO(macro) \
3643 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3644 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3645 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \
3646 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3647 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3648 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \
3649 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3650 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3651
3652 void java_lang_reflect_Field::compute_offsets() {
3653 InstanceKlass* k = vmClasses::reflect_Field_klass();
3654 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3655 }
3656
3657 #if INCLUDE_CDS
3658 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3659 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3660 }
3661 #endif
3662
3663 Handle java_lang_reflect_Field::create(TRAPS) {
3664 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3665 Symbol* name = vmSymbols::java_lang_reflect_Field();
3666 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3667 InstanceKlass* ik = InstanceKlass::cast(k);
3668 // Ensure it is initialized
3669 ik->initialize(CHECK_NH);
3670 return ik->allocate_instance_handle(THREAD);
3671 }
3672
3673 oop java_lang_reflect_Field::clazz(oop reflect) {
3674 return reflect->obj_field(_clazz_offset);
3675 }
3676
3677 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3678 reflect->obj_field_put(_clazz_offset, value);
3679 }
3680
3681 oop java_lang_reflect_Field::name(oop field) {
3682 return field->obj_field(_name_offset);
3683 }
3684
3685 void java_lang_reflect_Field::set_name(oop field, oop value) {
3686 field->obj_field_put(_name_offset, value);
3687 }
3688
3689 oop java_lang_reflect_Field::type(oop field) {
3690 return field->obj_field(_type_offset);
3691 }
3692
3693 void java_lang_reflect_Field::set_type(oop field, oop value) {
3694 field->obj_field_put(_type_offset, value);
3695 }
3696
3697 int java_lang_reflect_Field::slot(oop reflect) {
3698 return reflect->int_field(_slot_offset);
3699 }
3700
3701 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3702 reflect->int_field_put(_slot_offset, value);
3703 }
3704
3705 int java_lang_reflect_Field::modifiers(oop field) {
3706 return field->int_field(_modifiers_offset);
3707 }
3708
3709 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3710 field->int_field_put(_modifiers_offset, value);
3711 }
3712
3713 void java_lang_reflect_Field::set_trusted_final(oop field) {
3714 field->bool_field_put(_trusted_final_offset, true);
3715 }
3716
3717 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3718 field->obj_field_put(_signature_offset, value);
3719 }
3720
3721 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3722 field->obj_field_put(_annotations_offset, value);
3723 }
3724
3725 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3726 // Allocate java.lang.reflect.RecordComponent instance
3727 HandleMark hm(THREAD);
3728 InstanceKlass* ik = vmClasses::RecordComponent_klass();
3729 assert(ik != nullptr, "must be loaded");
3730 ik->initialize(CHECK_NULL);
3731
3732 Handle element = ik->allocate_instance_handle(CHECK_NULL);
3733
3734 Handle decl_class(THREAD, holder->java_mirror());
3735 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3736
3737 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3738 oop component_name = StringTable::intern(name, CHECK_NULL);
3739 java_lang_reflect_RecordComponent::set_name(element(), component_name);
3740
3741 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3742 Handle component_type_h =
3743 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3744 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3745
3746 Method* accessor_method = nullptr;
3747 {
3748 // Prepend "()" to type to create the full method signature.
3749 ResourceMark rm(THREAD);
3750 int sig_len = type->utf8_length() + 3; // "()" and null char
3751 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3752 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3753 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3754 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3755 }
3756
3757 if (accessor_method != nullptr) {
3758 methodHandle method(THREAD, accessor_method);
3759 oop m = Reflection::new_method(method, false, CHECK_NULL);
3760 java_lang_reflect_RecordComponent::set_accessor(element(), m);
3761 } else {
3762 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3763 }
3764
3765 int sig_index = component->generic_signature_index();
3766 if (sig_index > 0) {
3767 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3768 oop component_sig = StringTable::intern(sig, CHECK_NULL);
3769 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3770 } else {
3771 java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3772 }
3773
3774 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3775 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3776
3777 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3778 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3779
3780 return element();
3781 }
3782
3783 int reflect_ConstantPool::_oop_offset;
3784
3785 #define CONSTANTPOOL_FIELDS_DO(macro) \
3786 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3787
3788 void reflect_ConstantPool::compute_offsets() {
3789 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3790 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3791 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3792 }
3793
3794 #if INCLUDE_CDS
3795 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3796 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3797 }
3798 #endif
3799
3800 int java_lang_reflect_Parameter::_name_offset;
3801 int java_lang_reflect_Parameter::_modifiers_offset;
3802 int java_lang_reflect_Parameter::_index_offset;
3803 int java_lang_reflect_Parameter::_executable_offset;
3804
3805 #define PARAMETER_FIELDS_DO(macro) \
3806 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3807 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3808 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \
3809 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3810
3811 void java_lang_reflect_Parameter::compute_offsets() {
3812 InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3813 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3814 }
3815
3816 #if INCLUDE_CDS
3817 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3818 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3819 }
3820 #endif
3821
3822 Handle java_lang_reflect_Parameter::create(TRAPS) {
3823 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3824 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3825 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3826 InstanceKlass* ik = InstanceKlass::cast(k);
3827 // Ensure it is initialized
3828 ik->initialize(CHECK_NH);
3829 return ik->allocate_instance_handle(THREAD);
3830 }
3831
3832 oop java_lang_reflect_Parameter::name(oop param) {
3833 return param->obj_field(_name_offset);
3834 }
3835
3836 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3837 param->obj_field_put(_name_offset, value);
3838 }
3839
3840 int java_lang_reflect_Parameter::modifiers(oop param) {
3841 return param->int_field(_modifiers_offset);
3842 }
3843
3844 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3845 param->int_field_put(_modifiers_offset, value);
3846 }
3847
3848 int java_lang_reflect_Parameter::index(oop param) {
3849 return param->int_field(_index_offset);
3850 }
3851
3852 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3853 param->int_field_put(_index_offset, value);
3854 }
3855
3856 oop java_lang_reflect_Parameter::executable(oop param) {
3857 return param->obj_field(_executable_offset);
3858 }
3859
3860 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3861 param->obj_field_put(_executable_offset, value);
3862 }
3863
3864 // java_lang_Module
3865
3866 int java_lang_Module::_loader_offset;
3867 int java_lang_Module::_name_offset;
3868 int java_lang_Module::_module_entry_offset;
3869
3870 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3871 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3872 return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3873 vmSymbols::java_lang_module_init_signature(),
3874 loader, module_name, CHECK_NH);
3875 }
3876
3877 #define MODULE_FIELDS_DO(macro) \
3878 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3879 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false)
3880
3881 void java_lang_Module::compute_offsets() {
3882 InstanceKlass* k = vmClasses::Module_klass();
3883 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3884 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3885 }
3886
3887 #if INCLUDE_CDS
3888 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3889 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3890 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3891 }
3892 #endif
3893
3894 oop java_lang_Module::loader(oop module) {
3895 return module->obj_field(_loader_offset);
3896 }
3897
3898 void java_lang_Module::set_loader(oop module, oop value) {
3899 module->obj_field_put(_loader_offset, value);
3900 }
3901
3902 oop java_lang_Module::name(oop module) {
3903 return module->obj_field(_name_offset);
3904 }
3905
3906 void java_lang_Module::set_name(oop module, oop value) {
3907 module->obj_field_put(_name_offset, value);
3908 }
3909
3910 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3911 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3912 assert(module != nullptr, "module can't be null");
3913 assert(oopDesc::is_oop(module), "module must be oop");
3914
3915 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3916 return module_entry;
3917 }
3918
3919 ModuleEntry* java_lang_Module::module_entry(oop module) {
3920 ModuleEntry* module_entry = module_entry_raw(module);
3921 if (module_entry == nullptr) {
3922 // If the inject field containing the ModuleEntry* is null then return the
3923 // class loader's unnamed module.
3924 oop loader = java_lang_Module::loader(module);
3925 Handle h_loader = Handle(Thread::current(), loader);
3926 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3927 return loader_cld->unnamed_module();
3928 }
3929 return module_entry;
3930 }
3931
3932 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3933 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3934 assert(module != nullptr, "module can't be null");
3935 assert(oopDesc::is_oop(module), "module must be oop");
3936 module->address_field_put(_module_entry_offset, (address)module_entry);
3937 }
3938
3939 Handle reflect_ConstantPool::create(TRAPS) {
3940 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3941 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3942 // Ensure it is initialized
3943 k->initialize(CHECK_NH);
3944 return k->allocate_instance_handle(THREAD);
3945 }
3946
3947
3948 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3949 oop mirror = value->pool_holder()->java_mirror();
3950 // Save the mirror to get back the constant pool.
3951 reflect->obj_field_put(_oop_offset, mirror);
3952 }
3953
3954 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3955
3956 oop mirror = reflect->obj_field(_oop_offset);
3957 Klass* k = java_lang_Class::as_Klass(mirror);
3958 assert(k->is_instance_klass(), "Must be");
3959
3960 // Get the constant pool back from the klass. Since class redefinition
3961 // merges the new constant pool into the old, this is essentially the
3962 // same constant pool as the original. If constant pool merging is
3963 // no longer done in the future, this will have to change to save
3964 // the original.
3965 return InstanceKlass::cast(k)->constants();
3966 }
3967
3968
3969 // Support for java_lang_ref_Reference
3970
3971 bool java_lang_ref_Reference::_offsets_initialized;
3972
3973 int java_lang_ref_Reference::_referent_offset;
3974 int java_lang_ref_Reference::_queue_offset;
3975 int java_lang_ref_Reference::_next_offset;
3976 int java_lang_ref_Reference::_discovered_offset;
3977
3978 #define REFERENCE_FIELDS_DO(macro) \
3979 macro(_referent_offset, k, "referent", object_signature, false); \
3980 macro(_queue_offset, k, "queue", referencequeue_signature, false); \
3981 macro(_next_offset, k, "next", reference_signature, false); \
3982 macro(_discovered_offset, k, "discovered", reference_signature, false);
3983
3984 void java_lang_ref_Reference::compute_offsets() {
3985 if (_offsets_initialized) {
3986 return;
3987 }
3988 _offsets_initialized = true;
3989 InstanceKlass* k = vmClasses::Reference_klass();
3990 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3991 }
3992
3993 #if INCLUDE_CDS
3994 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3995 f->do_bool(&_offsets_initialized);
3996 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3997 }
3998 #endif
3999
4000 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
4001 assert(obj != nullptr, "sanity");
4002 if (offset != _referent_offset) {
4003 return false;
4004 }
4005
4006 Klass* k = obj->klass();
4007 if (!k->is_instance_klass()) {
4008 return false;
4009 }
4010
4011 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
4012 bool is_reference = ik->reference_type() != REF_NONE;
4013 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
4014 return is_reference;
4015 }
4016
4017 int java_lang_boxing_object::_value_offset;
4018 int java_lang_boxing_object::_long_value_offset;
4019
4020 #define BOXING_FIELDS_DO(macro) \
4021 macro(_value_offset, integerKlass, "value", int_signature, false); \
4022 macro(_long_value_offset, longKlass, "value", long_signature, false);
4023
4024 void java_lang_boxing_object::compute_offsets() {
4025 InstanceKlass* integerKlass = vmClasses::Integer_klass();
4026 InstanceKlass* longKlass = vmClasses::Long_klass();
4027 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4028 }
4029
4030 #if INCLUDE_CDS
4031 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
4032 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4033 }
4034 #endif
4035
4036 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
4037 Klass* k = vmClasses::box_klass(type);
4038 if (k == nullptr) return nullptr;
4039 InstanceKlass* ik = InstanceKlass::cast(k);
4040 if (!ik->is_initialized()) {
4041 ik->initialize(CHECK_NULL);
4042 }
4043 return ik->allocate_instance(THREAD);
4044 }
4045
4046
4047 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
4048 oop box = initialize_and_allocate(type, CHECK_NULL);
4049 if (box == nullptr) return nullptr;
4050 switch (type) {
4051 case T_BOOLEAN:
4052 box->bool_field_put(_value_offset, value->z);
4053 break;
4054 case T_CHAR:
4055 box->char_field_put(_value_offset, value->c);
4056 break;
4057 case T_FLOAT:
4058 box->float_field_put(_value_offset, value->f);
4059 break;
4060 case T_DOUBLE:
4061 box->double_field_put(_long_value_offset, value->d);
4062 break;
4063 case T_BYTE:
4064 box->byte_field_put(_value_offset, value->b);
4065 break;
4066 case T_SHORT:
4067 box->short_field_put(_value_offset, value->s);
4068 break;
4069 case T_INT:
4070 box->int_field_put(_value_offset, value->i);
4071 break;
4072 case T_LONG:
4073 box->long_field_put(_long_value_offset, value->j);
4074 break;
4075 default:
4076 return nullptr;
4077 }
4078 return box;
4079 }
4080
4081
4082 BasicType java_lang_boxing_object::basic_type(oop box) {
4083 if (box == nullptr) return T_ILLEGAL;
4084 BasicType type = vmClasses::box_klass_type(box->klass());
4085 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
4086 return T_ILLEGAL;
4087 return type;
4088 }
4089
4090
4091 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
4092 BasicType type = vmClasses::box_klass_type(box->klass());
4093 switch (type) {
4094 case T_BOOLEAN:
4095 value->z = box->bool_field(_value_offset);
4096 break;
4097 case T_CHAR:
4098 value->c = box->char_field(_value_offset);
4099 break;
4100 case T_FLOAT:
4101 value->f = box->float_field(_value_offset);
4102 break;
4103 case T_DOUBLE:
4104 value->d = box->double_field(_long_value_offset);
4105 break;
4106 case T_BYTE:
4107 value->b = box->byte_field(_value_offset);
4108 break;
4109 case T_SHORT:
4110 value->s = box->short_field(_value_offset);
4111 break;
4112 case T_INT:
4113 value->i = box->int_field(_value_offset);
4114 break;
4115 case T_LONG:
4116 value->j = box->long_field(_long_value_offset);
4117 break;
4118 default:
4119 return T_ILLEGAL;
4120 } // end switch
4121 return type;
4122 }
4123
4124
4125 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
4126 BasicType type = vmClasses::box_klass_type(box->klass());
4127 switch (type) {
4128 case T_BOOLEAN:
4129 box->bool_field_put(_value_offset, value->z);
4130 break;
4131 case T_CHAR:
4132 box->char_field_put(_value_offset, value->c);
4133 break;
4134 case T_FLOAT:
4135 box->float_field_put(_value_offset, value->f);
4136 break;
4137 case T_DOUBLE:
4138 box->double_field_put(_long_value_offset, value->d);
4139 break;
4140 case T_BYTE:
4141 box->byte_field_put(_value_offset, value->b);
4142 break;
4143 case T_SHORT:
4144 box->short_field_put(_value_offset, value->s);
4145 break;
4146 case T_INT:
4147 box->int_field_put(_value_offset, value->i);
4148 break;
4149 case T_LONG:
4150 box->long_field_put(_long_value_offset, value->j);
4151 break;
4152 default:
4153 return T_ILLEGAL;
4154 } // end switch
4155 return type;
4156 }
4157
4158
4159 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
4160 switch (type) {
4161 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
4162 case T_CHAR: st->print("%d", value->c); break;
4163 case T_BYTE: st->print("%d", value->b); break;
4164 case T_SHORT: st->print("%d", value->s); break;
4165 case T_INT: st->print("%d", value->i); break;
4166 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
4167 case T_FLOAT: st->print("%f", value->f); break;
4168 case T_DOUBLE: st->print("%lf", value->d); break;
4169 default: st->print("type %d?", type); break;
4170 }
4171 }
4172
4173
4174 // Support for java_lang_ref_SoftReference
4175 //
4176
4177 int java_lang_ref_SoftReference::_timestamp_offset;
4178 int java_lang_ref_SoftReference::_static_clock_offset;
4179
4180 #define SOFTREFERENCE_FIELDS_DO(macro) \
4181 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
4182 macro(_static_clock_offset, k, "clock", long_signature, true)
4183
4184 void java_lang_ref_SoftReference::compute_offsets() {
4185 InstanceKlass* k = vmClasses::SoftReference_klass();
4186 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4187 }
4188
4189 #if INCLUDE_CDS
4190 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
4191 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4192 }
4193 #endif
4194
4195 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
4196 return ref->long_field(_timestamp_offset);
4197 }
4198
4199 jlong java_lang_ref_SoftReference::clock() {
4200 InstanceKlass* ik = vmClasses::SoftReference_klass();
4201 oop base = ik->static_field_base_raw();
4202 return base->long_field(_static_clock_offset);
4203 }
4204
4205 void java_lang_ref_SoftReference::set_clock(jlong value) {
4206 InstanceKlass* ik = vmClasses::SoftReference_klass();
4207 oop base = ik->static_field_base_raw();
4208 base->long_field_put(_static_clock_offset, value);
4209 }
4210
4211 // Support for java_lang_invoke_DirectMethodHandle
4212
4213 int java_lang_invoke_DirectMethodHandle::_member_offset;
4214
4215 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
4216 oop member_name = nullptr;
4217 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
4218 "a DirectMethodHandle oop is expected");
4219 return dmh->obj_field(_member_offset);
4220 }
4221
4222 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
4223 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
4224
4225 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
4226 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
4227 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4228 }
4229
4230 #if INCLUDE_CDS
4231 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
4232 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4233 }
4234 #endif
4235
4236 // Support for java_lang_invoke_MethodHandle
4237
4238 int java_lang_invoke_MethodHandle::_type_offset;
4239 int java_lang_invoke_MethodHandle::_form_offset;
4240
4241 int java_lang_invoke_MemberName::_clazz_offset;
4242 int java_lang_invoke_MemberName::_name_offset;
4243 int java_lang_invoke_MemberName::_type_offset;
4244 int java_lang_invoke_MemberName::_flags_offset;
4245 int java_lang_invoke_MemberName::_method_offset;
4246 int java_lang_invoke_MemberName::_vmindex_offset;
4247
4248 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
4249 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
4250
4251 int java_lang_invoke_LambdaForm::_vmentry_offset;
4252
4253 #define METHODHANDLE_FIELDS_DO(macro) \
4254 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4255 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
4256
4257 void java_lang_invoke_MethodHandle::compute_offsets() {
4258 InstanceKlass* k = vmClasses::MethodHandle_klass();
4259 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4260 }
4261
4262 #if INCLUDE_CDS
4263 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4264 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4265 }
4266 #endif
4267
4268 #define MEMBERNAME_FIELDS_DO(macro) \
4269 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4270 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4271 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
4272 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
4273 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
4274
4275 void java_lang_invoke_MemberName::compute_offsets() {
4276 InstanceKlass* k = vmClasses::MemberName_klass();
4277 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4278 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4279 }
4280
4281 #if INCLUDE_CDS
4282 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4283 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4284 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4285 }
4286 #endif
4287
4288 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4289 macro(_vmholder_offset, k, "vmholder", class_signature, false)
4290
4291 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4292 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4293 assert(k != nullptr, "jdk mismatch");
4294 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4295 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4296 }
4297
4298 #if INCLUDE_CDS
4299 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4300 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4301 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4302 }
4303 #endif
4304
4305 #define LAMBDAFORM_FIELDS_DO(macro) \
4306 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4307
4308 void java_lang_invoke_LambdaForm::compute_offsets() {
4309 InstanceKlass* k = vmClasses::LambdaForm_klass();
4310 assert (k != nullptr, "jdk mismatch");
4311 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4312 }
4313
4314 #if INCLUDE_CDS
4315 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4316 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4317 }
4318 #endif
4319
4320 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4321 return obj != nullptr && is_subclass(obj->klass());
4322 }
4323
4324 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4325 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4326
4327 #define NEP_FIELDS_DO(macro) \
4328 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
4329 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4330
4331 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4332 return obj != nullptr && is_subclass(obj->klass());
4333 }
4334
4335 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4336 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4337 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4338 }
4339
4340 #if INCLUDE_CDS
4341 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4342 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4343 }
4344 #endif
4345
4346 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4347 return entry->obj_field(_method_type_offset);
4348 }
4349
4350 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4351 return entry->long_field(_downcall_stub_address_offset);
4352 }
4353
4354 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4355 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4356 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4357 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4358 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4359 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4360 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4361
4362 #define ABIDescriptor_FIELDS_DO(macro) \
4363 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4364 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4365 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4366 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4367 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4368 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4369 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4370
4371 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4372 return obj != nullptr && is_subclass(obj->klass());
4373 }
4374
4375 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4376 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4377 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4378 }
4379
4380 #if INCLUDE_CDS
4381 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4382 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4383 }
4384 #endif
4385
4386 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4387 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4388 }
4389
4390 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4391 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4392 }
4393
4394 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4395 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4396 }
4397
4398 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4399 return entry->int_field(_stackAlignment_offset);
4400 }
4401
4402 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4403 return entry->int_field(_shadowSpace_offset);
4404 }
4405
4406 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4407 return entry->obj_field(_scratch1_offset);
4408 }
4409
4410 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4411 return entry->obj_field(_scratch2_offset);
4412 }
4413
4414 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4415 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4416 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4417 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4418
4419 #define VMStorage_FIELDS_DO(macro) \
4420 macro(_type_offset, k, "type", byte_signature, false); \
4421 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4422 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4423 macro(_debugName_offset, k, "debugName", string_signature, false); \
4424
4425 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4426 return obj != nullptr && is_subclass(obj->klass());
4427 }
4428
4429 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4430 InstanceKlass* k = vmClasses::VMStorage_klass();
4431 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4432 }
4433
4434 #if INCLUDE_CDS
4435 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4436 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4437 }
4438 #endif
4439
4440 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4441 return entry->byte_field(_type_offset);
4442 }
4443
4444 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4445 return entry->int_field(_indexOrOffset_offset);
4446 }
4447
4448 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4449 return entry->short_field(_segmentMaskOrSize_offset);
4450 }
4451
4452 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4453 return entry->obj_field(_debugName_offset);
4454 }
4455
4456 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4457 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4458
4459 #define CallConv_FIELDS_DO(macro) \
4460 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4461 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4462
4463 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4464 return obj != nullptr && is_subclass(obj->klass());
4465 }
4466
4467 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4468 InstanceKlass* k = vmClasses::CallConv_klass();
4469 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4470 }
4471
4472 #if INCLUDE_CDS
4473 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4474 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4475 }
4476 #endif
4477
4478 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4479 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4480 }
4481
4482 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4483 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4484 }
4485
4486 oop java_lang_invoke_MethodHandle::type(oop mh) {
4487 return mh->obj_field(_type_offset);
4488 }
4489
4490 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4491 mh->obj_field_put(_type_offset, mtype);
4492 }
4493
4494 oop java_lang_invoke_MethodHandle::form(oop mh) {
4495 assert(_form_offset != 0, "");
4496 return mh->obj_field(_form_offset);
4497 }
4498
4499 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4500 assert(_form_offset != 0, "");
4501 mh->obj_field_put(_form_offset, lform);
4502 }
4503
4504 /// MemberName accessors
4505
4506 oop java_lang_invoke_MemberName::clazz(oop mname) {
4507 assert(is_instance(mname), "wrong type");
4508 return mname->obj_field(_clazz_offset);
4509 }
4510
4511 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4512 assert(is_instance(mname), "wrong type");
4513 mname->obj_field_put(_clazz_offset, clazz);
4514 }
4515
4516 oop java_lang_invoke_MemberName::name(oop mname) {
4517 assert(is_instance(mname), "wrong type");
4518 return mname->obj_field(_name_offset);
4519 }
4520
4521 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4522 assert(is_instance(mname), "wrong type");
4523 mname->obj_field_put(_name_offset, name);
4524 }
4525
4526 oop java_lang_invoke_MemberName::type(oop mname) {
4527 assert(is_instance(mname), "wrong type");
4528 return mname->obj_field(_type_offset);
4529 }
4530
4531 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4532 assert(is_instance(mname), "wrong type");
4533 mname->obj_field_put(_type_offset, type);
4534 }
4535
4536 int java_lang_invoke_MemberName::flags(oop mname) {
4537 assert(is_instance(mname), "wrong type");
4538 return mname->int_field(_flags_offset);
4539 }
4540
4541 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4542 assert(is_instance(mname), "wrong type");
4543 mname->int_field_put(_flags_offset, flags);
4544 }
4545
4546
4547 // Return vmtarget from ResolvedMethodName method field through indirection
4548 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4549 assert(is_instance(mname), "wrong type");
4550 oop method = mname->obj_field(_method_offset);
4551 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4552 }
4553
4554 bool java_lang_invoke_MemberName::is_method(oop mname) {
4555 assert(is_instance(mname), "must be MemberName");
4556 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
4557 }
4558
4559 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4560 assert(is_instance(mname), "wrong type");
4561 mname->obj_field_put(_method_offset, resolved_method);
4562 }
4563
4564 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4565 assert(is_instance(mname), "wrong type");
4566 return (intptr_t) mname->address_field(_vmindex_offset);
4567 }
4568
4569 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4570 assert(is_instance(mname), "wrong type");
4571 mname->address_field_put(_vmindex_offset, (address) index);
4572 }
4573
4574
4575 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4576 assert(is_instance(resolved_method), "wrong type");
4577 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4578 assert(m->is_method(), "must be");
4579 return m;
4580 }
4581
4582 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4583 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4584 assert(is_instance(resolved_method), "wrong type");
4585 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4586 }
4587
4588 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4589 assert(is_instance(resolved_method), "wrong type");
4590 resolved_method->obj_field_put(_vmholder_offset, holder);
4591 }
4592
4593 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4594 const Method* method = m();
4595
4596 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4597 oop resolved_method = ResolvedMethodTable::find_method(method);
4598 if (resolved_method != nullptr) {
4599 return resolved_method;
4600 }
4601
4602 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4603 if (!k->is_initialized()) {
4604 k->initialize(CHECK_NULL);
4605 }
4606
4607 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4608
4609 NoSafepointVerifier nsv;
4610
4611 if (method->is_old()) {
4612 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4613 method->get_new_method();
4614 }
4615
4616 InstanceKlass* holder = method->method_holder();
4617
4618 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4619 // Add a reference to the loader (actually mirror because hidden classes may not have
4620 // distinct loaders) to ensure the metadata is kept alive.
4621 // This mirror may be different than the one in clazz field.
4622 set_vmholder(new_resolved_method, holder->java_mirror());
4623
4624 // Set flag in class to indicate this InstanceKlass has entries in the table
4625 // to avoid walking table during redefinition if none of the redefined classes
4626 // have any membernames in the table.
4627 holder->set_has_resolved_methods();
4628
4629 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4630 }
4631
4632 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4633 assert(is_instance(lform), "wrong type");
4634 return lform->obj_field(_vmentry_offset);
4635 }
4636
4637
4638 // Support for java_lang_invoke_MethodType
4639
4640 int java_lang_invoke_MethodType::_rtype_offset;
4641 int java_lang_invoke_MethodType::_ptypes_offset;
4642
4643 #define METHODTYPE_FIELDS_DO(macro) \
4644 macro(_rtype_offset, k, "rtype", class_signature, false); \
4645 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4646
4647 void java_lang_invoke_MethodType::compute_offsets() {
4648 InstanceKlass* k = vmClasses::MethodType_klass();
4649 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4650 }
4651
4652 #if INCLUDE_CDS
4653 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4654 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4655 }
4656 #endif
4657
4658 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4659 st->print("(");
4660 objArrayOop pts = ptypes(mt);
4661 if (pts != nullptr) {
4662 for (int i = 0, limit = pts->length(); i < limit; i++) {
4663 java_lang_Class::print_signature(pts->obj_at(i), st);
4664 }
4665 } else {
4666 st->print("null");
4667 }
4668 st->print(")");
4669 oop rt = rtype(mt);
4670 if (rt != nullptr) {
4671 java_lang_Class::print_signature(rt, st);
4672 } else {
4673 st->print("null");
4674 }
4675 }
4676
4677 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4678 ResourceMark rm;
4679 stringStream buffer(128);
4680 print_signature(mt, &buffer);
4681 const char* sigstr = buffer.base();
4682 int siglen = (int) buffer.size();
4683 Symbol *name;
4684 if (!intern_if_not_found) {
4685 name = SymbolTable::probe(sigstr, siglen);
4686 } else {
4687 name = SymbolTable::new_symbol(sigstr, siglen);
4688 }
4689 return name;
4690 }
4691
4692 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4693 if (mt1 == mt2)
4694 return true;
4695 if (rtype(mt1) != rtype(mt2))
4696 return false;
4697 if (ptype_count(mt1) != ptype_count(mt2))
4698 return false;
4699 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4700 if (ptype(mt1, i) != ptype(mt2, i))
4701 return false;
4702 }
4703 return true;
4704 }
4705
4706 oop java_lang_invoke_MethodType::rtype(oop mt) {
4707 assert(is_instance(mt), "must be a MethodType");
4708 return mt->obj_field(_rtype_offset);
4709 }
4710
4711 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4712 assert(is_instance(mt), "must be a MethodType");
4713 return (objArrayOop) mt->obj_field(_ptypes_offset);
4714 }
4715
4716 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4717 return ptypes(mt)->obj_at(idx);
4718 }
4719
4720 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4721 return ptypes(mt)->length();
4722 }
4723
4724 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4725 objArrayOop pts = ptypes(mt);
4726 int count = pts->length();
4727 int slots = 0;
4728 for (int i = 0; i < count; i++) {
4729 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4730 slots += type2size[bt];
4731 }
4732 return slots;
4733 }
4734
4735 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4736 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4737 return type2size[bt];
4738 }
4739
4740
4741 // Support for java_lang_invoke_CallSite
4742
4743 int java_lang_invoke_CallSite::_target_offset;
4744 int java_lang_invoke_CallSite::_vmdependencies_offset;
4745 int java_lang_invoke_CallSite::_last_cleanup_offset;
4746
4747 #define CALLSITE_FIELDS_DO(macro) \
4748 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
4749
4750 void java_lang_invoke_CallSite::compute_offsets() {
4751 InstanceKlass* k = vmClasses::CallSite_klass();
4752 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4753 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4754 }
4755
4756 #if INCLUDE_CDS
4757 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4758 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4759 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4760 }
4761 #endif
4762
4763 DependencyContext java_lang_invoke_CallSite::vmdependencies(oop call_site) {
4764 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4765 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4766 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4767 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4768 return dep_ctx;
4769 }
4770
4771 // Support for java_lang_invoke_ConstantCallSite
4772
4773 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4774
4775 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4776 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4777
4778 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4779 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4780 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4781 }
4782
4783 #if INCLUDE_CDS
4784 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4785 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4786 }
4787 #endif
4788
4789 // Support for java_lang_ClassLoader
4790
4791 int java_lang_ClassLoader::_loader_data_offset;
4792 int java_lang_ClassLoader::_parallelCapable_offset;
4793 int java_lang_ClassLoader::_name_offset;
4794 int java_lang_ClassLoader::_nameAndId_offset;
4795 int java_lang_ClassLoader::_unnamedModule_offset;
4796 int java_lang_ClassLoader::_parent_offset;
4797
4798 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4799 assert(loader != nullptr, "loader must not be null");
4800 assert(oopDesc::is_oop(loader), "loader must be oop");
4801 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4802 }
4803
4804 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4805 assert(loader != nullptr, "loader must not be null");
4806 assert(oopDesc::is_oop(loader), "loader must be oop");
4807 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4808 }
4809
4810 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4811 assert(loader != nullptr, "loader must not be null");
4812 assert(oopDesc::is_oop(loader), "loader must be oop");
4813 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4814 }
4815
4816 #define CLASSLOADER_FIELDS_DO(macro) \
4817 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4818 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4819 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
4820 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4821 macro(_parent_offset, k1, "parent", classloader_signature, false)
4822
4823 void java_lang_ClassLoader::compute_offsets() {
4824 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4825 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4826
4827 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4828 }
4829
4830 #if INCLUDE_CDS
4831 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4832 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4833 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4834 }
4835 #endif
4836
4837 oop java_lang_ClassLoader::parent(oop loader) {
4838 assert(is_instance(loader), "loader must be oop");
4839 return loader->obj_field(_parent_offset);
4840 }
4841
4842 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4843 assert(is_instance(loader), "loader must be oop");
4844 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4845 }
4846
4847 // Returns the name field of this class loader. If the name field has not
4848 // been set, null will be returned.
4849 oop java_lang_ClassLoader::name(oop loader) {
4850 assert(is_instance(loader), "loader must be oop");
4851 return loader->obj_field(_name_offset);
4852 }
4853
4854 // Returns the nameAndId field of this class loader. The format is
4855 // as follows:
4856 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4857 // If the defining loader has no name then <qualified-class-name> @<id>
4858 // If built-in loader, then omit '@<id>' as there is only one instance.
4859 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4860 oop java_lang_ClassLoader::nameAndId(oop loader) {
4861 assert(is_instance(loader), "loader must be oop");
4862 return loader->obj_field(_nameAndId_offset);
4863 }
4864
4865 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4866 assert(is_instance(loader), "loader must be oop");
4867 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4868 oop acl = loader;
4869 DEBUG_ONLY(jint loop_count = 0);
4870 // This loop taken verbatim from ClassLoader.java:
4871 do {
4872 acl = parent(acl);
4873 if (cl == acl) {
4874 return true;
4875 }
4876 assert(++loop_count > 0, "loop_count overflow");
4877 } while (acl != nullptr);
4878 return false;
4879 }
4880
4881 bool java_lang_ClassLoader::is_instance(oop obj) {
4882 return obj != nullptr && is_subclass(obj->klass());
4883 }
4884
4885
4886 // For class loader classes, parallelCapable defined
4887 // based on non-null field
4888 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4889 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4890 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4891 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4892 }
4893
4894 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4895 oop cl = SystemDictionary::java_system_loader();
4896 while(cl != nullptr) {
4897 if (cl == loader) return true;
4898 cl = parent(cl);
4899 }
4900 return false;
4901 }
4902
4903 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4904 assert(is_instance(loader), "loader must be oop");
4905 return loader->obj_field(_unnamedModule_offset);
4906 }
4907
4908 // Support for java_lang_System
4909 //
4910
4911 int java_lang_System::_static_in_offset;
4912 int java_lang_System::_static_out_offset;
4913 int java_lang_System::_static_err_offset;
4914
4915 #define SYSTEM_FIELDS_DO(macro) \
4916 macro(_static_in_offset, k, "in", input_stream_signature, true); \
4917 macro(_static_out_offset, k, "out", print_stream_signature, true); \
4918 macro(_static_err_offset, k, "err", print_stream_signature, true);
4919
4920 void java_lang_System::compute_offsets() {
4921 InstanceKlass* k = vmClasses::System_klass();
4922 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4923 }
4924
4925 #if INCLUDE_CDS
4926 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4927 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4928 }
4929 #endif
4930
4931 // Support for jdk_internal_misc_UnsafeConstants
4932 //
4933 class UnsafeConstantsFixup : public FieldClosure {
4934 private:
4935 int _address_size;
4936 int _page_size;
4937 bool _big_endian;
4938 bool _use_unaligned_access;
4939 int _data_cache_line_flush_size;
4940 public:
4941 UnsafeConstantsFixup() {
4942 // round up values for all static final fields
4943 _address_size = sizeof(void*);
4944 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4945 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4946 _use_unaligned_access = UseUnalignedAccesses;
4947 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4948 }
4949
4950 void do_field(fieldDescriptor* fd) {
4951 oop mirror = fd->field_holder()->java_mirror();
4952 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4953 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4954 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4955 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4956 if (fd->name() == vmSymbols::address_size_name()) {
4957 mirror->int_field_put(fd->offset(), _address_size);
4958 } else if (fd->name() == vmSymbols::page_size_name()) {
4959 mirror->int_field_put(fd->offset(), _page_size);
4960 } else if (fd->name() == vmSymbols::big_endian_name()) {
4961 mirror->bool_field_put(fd->offset(), _big_endian);
4962 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4963 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4964 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4965 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4966 } else {
4967 assert(false, "unexpected UnsafeConstants field");
4968 }
4969 }
4970 };
4971
4972 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4973 UnsafeConstantsFixup fixup;
4974 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4975 }
4976
4977
4978 // java_lang_StackTraceElement
4979
4980 int java_lang_StackTraceElement::_methodName_offset;
4981 int java_lang_StackTraceElement::_fileName_offset;
4982 int java_lang_StackTraceElement::_lineNumber_offset;
4983 int java_lang_StackTraceElement::_moduleName_offset;
4984 int java_lang_StackTraceElement::_moduleVersion_offset;
4985 int java_lang_StackTraceElement::_classLoaderName_offset;
4986 int java_lang_StackTraceElement::_declaringClass_offset;
4987 int java_lang_StackTraceElement::_declaringClassObject_offset;
4988
4989 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4990 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4991 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4992 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
4993 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4994 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
4995 macro(_methodName_offset, k, "methodName", string_signature, false); \
4996 macro(_fileName_offset, k, "fileName", string_signature, false); \
4997 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
4998
4999 // Support for java_lang_StackTraceElement
5000 void java_lang_StackTraceElement::compute_offsets() {
5001 InstanceKlass* k = vmClasses::StackTraceElement_klass();
5002 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5003 }
5004
5005 #if INCLUDE_CDS
5006 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
5007 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5008 }
5009 #endif
5010
5011 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
5012 element->obj_field_put(_fileName_offset, value);
5013 }
5014
5015 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
5016 element->obj_field_put(_declaringClass_offset, value);
5017 }
5018
5019 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
5020 element->obj_field_put(_methodName_offset, value);
5021 }
5022
5023 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
5024 element->int_field_put(_lineNumber_offset, value);
5025 }
5026
5027 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
5028 element->obj_field_put(_moduleName_offset, value);
5029 }
5030
5031 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
5032 element->obj_field_put(_moduleVersion_offset, value);
5033 }
5034
5035 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
5036 element->obj_field_put(_classLoaderName_offset, value);
5037 }
5038
5039 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
5040 element->obj_field_put(_declaringClassObject_offset, value);
5041 }
5042
5043
5044 // java_lang_AssertionStatusDirectives
5045
5046 int java_lang_AssertionStatusDirectives::_classes_offset;
5047 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
5048 int java_lang_AssertionStatusDirectives::_packages_offset;
5049 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
5050 int java_lang_AssertionStatusDirectives::_deflt_offset;
5051
5052 // Support for java Assertions - java_lang_AssertionStatusDirectives.
5053 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
5054 macro(_classes_offset, k, "classes", string_array_signature, false); \
5055 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
5056 macro(_packages_offset, k, "packages", string_array_signature, false); \
5057 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
5058 macro(_deflt_offset, k, "deflt", bool_signature, false)
5059
5060 void java_lang_AssertionStatusDirectives::compute_offsets() {
5061 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
5062 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5063 }
5064
5065 #if INCLUDE_CDS
5066 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
5067 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5068 }
5069 #endif
5070
5071 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
5072 o->obj_field_put(_classes_offset, val);
5073 }
5074
5075 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
5076 o->obj_field_put(_classEnabled_offset, val);
5077 }
5078
5079 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
5080 o->obj_field_put(_packages_offset, val);
5081 }
5082
5083 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
5084 o->obj_field_put(_packageEnabled_offset, val);
5085 }
5086
5087 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
5088 o->bool_field_put(_deflt_offset, val);
5089 }
5090
5091 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
5092
5093 #define AOS_FIELDS_DO(macro) \
5094 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
5095
5096 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
5097 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
5098 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5099 }
5100
5101 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
5102 assert(_owner_offset != 0, "Must be initialized");
5103 return obj->obj_field(_owner_offset);
5104 }
5105
5106 #if INCLUDE_CDS
5107 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
5108 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5109 }
5110 #endif
5111
5112 int vector_VectorPayload::_payload_offset;
5113
5114 #define VECTORPAYLOAD_FIELDS_DO(macro) \
5115 macro(_payload_offset, k, "payload", object_signature, false)
5116
5117 void vector_VectorPayload::compute_offsets() {
5118 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
5119 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5120 }
5121
5122 #if INCLUDE_CDS
5123 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
5124 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5125 }
5126 #endif
5127
5128 void vector_VectorPayload::set_payload(oop o, oop val) {
5129 o->obj_field_put(_payload_offset, val);
5130 }
5131
5132 bool vector_VectorPayload::is_instance(oop obj) {
5133 return obj != nullptr && is_subclass(obj->klass());
5134 }
5135
5136 int java_lang_Integer_IntegerCache::_static_cache_offset;
5137 int java_lang_Long_LongCache::_static_cache_offset;
5138 int java_lang_Character_CharacterCache::_static_cache_offset;
5139 int java_lang_Short_ShortCache::_static_cache_offset;
5140 int java_lang_Byte_ByteCache::_static_cache_offset;
5141
5142 #define INTEGER_CACHE_FIELDS_DO(macro) \
5143 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5144
5145 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5146 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5147 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5148 }
5149
5150 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5151 oop base = ik->static_field_base_raw();
5152 return objArrayOop(base->obj_field(_static_cache_offset));
5153 }
5154
5155 Symbol* java_lang_Integer_IntegerCache::symbol() {
5156 return vmSymbols::java_lang_Integer_IntegerCache();
5157 }
5158
5159 #if INCLUDE_CDS
5160 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5161 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5162 }
5163 #endif
5164 #undef INTEGER_CACHE_FIELDS_DO
5165
5166 jint java_lang_Integer::value(oop obj) {
5167 jvalue v;
5168 java_lang_boxing_object::get_value(obj, &v);
5169 return v.i;
5170 }
5171
5172 #define LONG_CACHE_FIELDS_DO(macro) \
5173 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5174
5175 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5176 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5177 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5178 }
5179
5180 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5181 oop base = ik->static_field_base_raw();
5182 return objArrayOop(base->obj_field(_static_cache_offset));
5183 }
5184
5185 Symbol* java_lang_Long_LongCache::symbol() {
5186 return vmSymbols::java_lang_Long_LongCache();
5187 }
5188
5189 #if INCLUDE_CDS
5190 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5191 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5192 }
5193 #endif
5194 #undef LONG_CACHE_FIELDS_DO
5195
5196 jlong java_lang_Long::value(oop obj) {
5197 jvalue v;
5198 java_lang_boxing_object::get_value(obj, &v);
5199 return v.j;
5200 }
5201
5202 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5203 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5204
5205 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5206 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5207 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5208 }
5209
5210 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5211 oop base = ik->static_field_base_raw();
5212 return objArrayOop(base->obj_field(_static_cache_offset));
5213 }
5214
5215 Symbol* java_lang_Character_CharacterCache::symbol() {
5216 return vmSymbols::java_lang_Character_CharacterCache();
5217 }
5218
5219 #if INCLUDE_CDS
5220 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5221 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5222 }
5223 #endif
5224 #undef CHARACTER_CACHE_FIELDS_DO
5225
5226 jchar java_lang_Character::value(oop obj) {
5227 jvalue v;
5228 java_lang_boxing_object::get_value(obj, &v);
5229 return v.c;
5230 }
5231
5232 #define SHORT_CACHE_FIELDS_DO(macro) \
5233 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5234
5235 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5236 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5237 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5238 }
5239
5240 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5241 oop base = ik->static_field_base_raw();
5242 return objArrayOop(base->obj_field(_static_cache_offset));
5243 }
5244
5245 Symbol* java_lang_Short_ShortCache::symbol() {
5246 return vmSymbols::java_lang_Short_ShortCache();
5247 }
5248
5249 #if INCLUDE_CDS
5250 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5251 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5252 }
5253 #endif
5254 #undef SHORT_CACHE_FIELDS_DO
5255
5256 jshort java_lang_Short::value(oop obj) {
5257 jvalue v;
5258 java_lang_boxing_object::get_value(obj, &v);
5259 return v.s;
5260 }
5261
5262 #define BYTE_CACHE_FIELDS_DO(macro) \
5263 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5264
5265 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5266 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5267 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5268 }
5269
5270 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5271 oop base = ik->static_field_base_raw();
5272 return objArrayOop(base->obj_field(_static_cache_offset));
5273 }
5274
5275 Symbol* java_lang_Byte_ByteCache::symbol() {
5276 return vmSymbols::java_lang_Byte_ByteCache();
5277 }
5278
5279 #if INCLUDE_CDS
5280 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5281 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5282 }
5283 #endif
5284 #undef BYTE_CACHE_FIELDS_DO
5285
5286 jbyte java_lang_Byte::value(oop obj) {
5287 jvalue v;
5288 java_lang_boxing_object::get_value(obj, &v);
5289 return v.b;
5290 }
5291
5292 int java_lang_Boolean::_static_TRUE_offset;
5293 int java_lang_Boolean::_static_FALSE_offset;
5294
5295 #define BOOLEAN_FIELDS_DO(macro) \
5296 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5297 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5298
5299
5300 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5301 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5302 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5303 }
5304
5305 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5306 oop base = ik->static_field_base_raw();
5307 return base->obj_field(_static_TRUE_offset);
5308 }
5309
5310 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5311 oop base = ik->static_field_base_raw();
5312 return base->obj_field(_static_FALSE_offset);
5313 }
5314
5315 Symbol* java_lang_Boolean::symbol() {
5316 return vmSymbols::java_lang_Boolean();
5317 }
5318
5319 #if INCLUDE_CDS
5320 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5321 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5322 }
5323 #endif
5324 #undef BOOLEAN_CACHE_FIELDS_DO
5325
5326 jboolean java_lang_Boolean::value(oop obj) {
5327 jvalue v;
5328 java_lang_boxing_object::get_value(obj, &v);
5329 return v.z;
5330 }
5331
5332 // java_lang_reflect_RecordComponent
5333
5334 int java_lang_reflect_RecordComponent::_clazz_offset;
5335 int java_lang_reflect_RecordComponent::_name_offset;
5336 int java_lang_reflect_RecordComponent::_type_offset;
5337 int java_lang_reflect_RecordComponent::_accessor_offset;
5338 int java_lang_reflect_RecordComponent::_signature_offset;
5339 int java_lang_reflect_RecordComponent::_annotations_offset;
5340 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5341
5342 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5343 macro(_clazz_offset, k, "clazz", class_signature, false); \
5344 macro(_name_offset, k, "name", string_signature, false); \
5345 macro(_type_offset, k, "type", class_signature, false); \
5346 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5347 macro(_signature_offset, k, "signature", string_signature, false); \
5348 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5349 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5350
5351 // Support for java_lang_reflect_RecordComponent
5352 void java_lang_reflect_RecordComponent::compute_offsets() {
5353 InstanceKlass* k = vmClasses::RecordComponent_klass();
5354 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5355 }
5356
5357 #if INCLUDE_CDS
5358 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5359 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5360 }
5361 #endif
5362
5363 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5364 element->obj_field_put(_clazz_offset, value);
5365 }
5366
5367 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5368 element->obj_field_put(_name_offset, value);
5369 }
5370
5371 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5372 element->obj_field_put(_type_offset, value);
5373 }
5374
5375 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5376 element->obj_field_put(_accessor_offset, value);
5377 }
5378
5379 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5380 element->obj_field_put(_signature_offset, value);
5381 }
5382
5383 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5384 element->obj_field_put(_annotations_offset, value);
5385 }
5386
5387 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5388 element->obj_field_put(_typeAnnotations_offset, value);
5389 }
5390
5391 // java_lang_InternalError
5392 int java_lang_InternalError::_during_unsafe_access_offset;
5393
5394 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5395 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5396 }
5397
5398 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5399 return internal_error->bool_field(_during_unsafe_access_offset);
5400 }
5401
5402 void java_lang_InternalError::compute_offsets() {
5403 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5404 }
5405
5406 #if INCLUDE_CDS
5407 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5408 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5409 }
5410 #endif
5411
5412 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5413 f(java_lang_Class) \
5414 f(java_lang_String) \
5415 f(java_lang_ref_Reference) \
5416 //end
5417
5418 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5419 f(java_lang_System) \
5420 f(java_lang_ClassLoader) \
5421 f(java_lang_Throwable) \
5422 f(java_lang_Thread) \
5423 f(java_lang_Thread_FieldHolder) \
5424 f(java_lang_Thread_Constants) \
5425 f(java_lang_ThreadGroup) \
5426 f(java_lang_VirtualThread) \
5427 f(java_lang_InternalError) \
5428 f(java_lang_AssertionStatusDirectives) \
5429 f(java_lang_ref_SoftReference) \
5430 f(java_lang_invoke_MethodHandle) \
5431 f(java_lang_invoke_DirectMethodHandle) \
5432 f(java_lang_invoke_MemberName) \
5433 f(java_lang_invoke_ResolvedMethodName) \
5434 f(java_lang_invoke_LambdaForm) \
5435 f(java_lang_invoke_MethodType) \
5436 f(java_lang_invoke_CallSite) \
5437 f(java_lang_invoke_ConstantCallSite) \
5438 f(java_lang_reflect_AccessibleObject) \
5439 f(java_lang_reflect_Method) \
5440 f(java_lang_reflect_Constructor) \
5441 f(java_lang_reflect_Field) \
5442 f(java_lang_reflect_RecordComponent) \
5443 f(reflect_ConstantPool) \
5444 f(java_lang_reflect_Parameter) \
5445 f(java_lang_Module) \
5446 f(java_lang_StackTraceElement) \
5447 f(java_lang_ClassFrameInfo) \
5448 f(java_lang_StackFrameInfo) \
5449 f(java_lang_LiveStackFrameInfo) \
5450 f(jdk_internal_vm_ContinuationScope) \
5451 f(jdk_internal_vm_Continuation) \
5452 f(jdk_internal_vm_StackChunk) \
5453 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5454 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5455 f(jdk_internal_foreign_abi_ABIDescriptor) \
5456 f(jdk_internal_foreign_abi_VMStorage) \
5457 f(jdk_internal_foreign_abi_CallConv) \
5458 f(jdk_internal_misc_UnsafeConstants) \
5459 f(java_lang_boxing_object) \
5460 f(vector_VectorPayload) \
5461 //end
5462
5463 #define BASIC_JAVA_CLASSES_DO(f) \
5464 BASIC_JAVA_CLASSES_DO_PART1(f) \
5465 BASIC_JAVA_CLASSES_DO_PART2(f)
5466
5467 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5468
5469 // Compute field offsets of all the classes in this file
5470 void JavaClasses::compute_offsets() {
5471 if (CDSConfig::is_using_archive()) {
5472 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5473 JvmtiExport::has_early_class_hook_env()),
5474 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5475 // None of the classes used by the rest of this function can be replaced by
5476 // JVMTI ClassFileLoadHook.
5477 // We are safe to use the archived offsets, which have already been restored
5478 // by JavaClasses::serialize_offsets, without computing the offsets again.
5479 return;
5480 }
5481
5482 // We have already called the compute_offsets() of the
5483 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5484 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5485 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5486 }
5487
5488 #if INCLUDE_CDS
5489 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5490
5491 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5492 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5493 }
5494 #endif
5495
5496 #if INCLUDE_CDS_JAVA_HEAP
5497 bool JavaClasses::is_supported_for_archiving(oop obj) {
5498 Klass* klass = obj->klass();
5499
5500 if (!CDSConfig::is_dumping_method_handles()) {
5501 // These are supported by CDS only when CDSConfig::is_dumping_method_handles() is enabled.
5502 if (klass == vmClasses::ResolvedMethodName_klass() ||
5503 klass == vmClasses::MemberName_klass()) {
5504 return false;
5505 }
5506 }
5507
5508 if (!AOTReferenceObjSupport::is_enabled() && klass->is_subclass_of(vmClasses::Reference_klass())) {
5509 return false;
5510 }
5511
5512 return true;
5513 }
5514 #endif
5515
5516 #ifndef PRODUCT
5517
5518 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5519
5520 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5521 const char* field_sig) {
5522 EXCEPTION_MARK;
5523 fieldDescriptor fd;
5524 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5525 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5526 InstanceKlass* ik = InstanceKlass::cast(k);
5527 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5528 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5529 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5530 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5531 return false;
5532 }
5533 if (fd.is_static()) {
5534 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5535 return false;
5536 }
5537 if (fd.offset() == deserialized_offset ) {
5538 return true;
5539 } else {
5540 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5541 klass_name, field_name, deserialized_offset, fd.offset());
5542 return false;
5543 }
5544 }
5545
5546 void JavaClasses::check_offsets() {
5547 bool valid = true;
5548
5549 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5550 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5551
5552 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5553 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5554
5555 // Boxed primitive objects (java_lang_boxing_object)
5556
5557 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
5558 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5559 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
5560 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5561 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
5562 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
5563 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
5564 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5565
5566 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5567 }
5568
5569 #endif // PRODUCT
5570
5571 int InjectedField::compute_offset() {
5572 InstanceKlass* ik = InstanceKlass::cast(klass());
5573 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5574 if (!may_be_java && !fs.field_flags().is_injected()) {
5575 // Only look at injected fields
5576 continue;
5577 }
5578 if (fs.name() == name() && fs.signature() == signature()) {
5579 return fs.offset();
5580 }
5581 }
5582 ResourceMark rm;
5583 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)" : "");
5584 #ifndef PRODUCT
5585 ik->print();
5586 tty->print_cr("all fields:");
5587 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5588 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());
5589 }
5590 #endif //PRODUCT
5591 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5592 return -1;
5593 }
5594
5595 void javaClasses_init() {
5596 JavaClasses::compute_offsets();
5597 JavaClasses::check_offsets();
5598 FilteredFieldsMap::initialize(); // must be done after computing offsets.
5599 }