1 /*
2 * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "cds/aotMetaspace.hpp"
26 #include "cds/aotReferenceObjSupport.hpp"
27 #include "cds/archiveBuilder.hpp"
28 #include "cds/archiveHeapLoader.hpp"
29 #include "cds/cdsConfig.hpp"
30 #include "cds/heapShared.hpp"
31 #include "classfile/altHashing.hpp"
32 #include "classfile/classLoaderData.inline.hpp"
33 #include "classfile/javaClasses.inline.hpp"
34 #include "classfile/javaClassesImpl.hpp"
35 #include "classfile/javaThreadStatus.hpp"
36 #include "classfile/moduleEntry.hpp"
37 #include "classfile/stringTable.hpp"
38 #include "classfile/symbolTable.hpp"
39 #include "classfile/systemDictionary.hpp"
40 #include "classfile/vmClasses.hpp"
41 #include "classfile/vmSymbols.hpp"
42 #include "code/debugInfo.hpp"
43 #include "code/dependencyContext.hpp"
44 #include "code/pcDesc.hpp"
45 #include "gc/shared/collectedHeap.inline.hpp"
46 #include "interpreter/interpreter.hpp"
47 #include "interpreter/linkResolver.hpp"
48 #include "jvm.h"
49 #include "logging/log.hpp"
50 #include "logging/logStream.hpp"
51 #include "memory/oopFactory.hpp"
52 #include "memory/resourceArea.hpp"
53 #include "memory/universe.hpp"
54 #include "oops/fieldInfo.hpp"
55 #include "oops/fieldStreams.inline.hpp"
56 #include "oops/instanceKlass.inline.hpp"
57 #include "oops/instanceMirrorKlass.hpp"
58 #include "oops/klass.inline.hpp"
59 #include "oops/method.inline.hpp"
60 #include "oops/objArrayKlass.hpp"
61 #include "oops/objArrayOop.inline.hpp"
62 #include "oops/oop.inline.hpp"
63 #include "oops/oopCast.inline.hpp"
64 #include "oops/recordComponent.hpp"
65 #include "oops/symbol.hpp"
66 #include "oops/typeArrayOop.inline.hpp"
67 #include "prims/jvmtiExport.hpp"
68 #include "prims/methodHandles.hpp"
69 #include "prims/resolvedMethodTable.hpp"
70 #include "runtime/continuationEntry.inline.hpp"
71 #include "runtime/continuationJavaClasses.inline.hpp"
72 #include "runtime/fieldDescriptor.inline.hpp"
73 #include "runtime/frame.inline.hpp"
74 #include "runtime/handles.inline.hpp"
75 #include "runtime/handshake.hpp"
76 #include "runtime/init.hpp"
77 #include "runtime/interfaceSupport.inline.hpp"
78 #include "runtime/java.hpp"
79 #include "runtime/javaCalls.hpp"
80 #include "runtime/javaThread.hpp"
81 #include "runtime/jniHandles.inline.hpp"
82 #include "runtime/reflectionUtils.hpp"
83 #include "runtime/safepoint.hpp"
84 #include "runtime/safepointVerifiers.hpp"
85 #include "runtime/threadSMR.hpp"
86 #include "runtime/vframe.inline.hpp"
87 #include "runtime/vm_version.hpp"
88 #include "utilities/align.hpp"
89 #include "utilities/globalDefinitions.hpp"
90 #include "utilities/growableArray.hpp"
91 #include "utilities/preserveException.hpp"
92 #include "utilities/utf8.hpp"
93 #if INCLUDE_JVMCI
94 #include "jvmci/jvmciJavaClasses.hpp"
95 #endif
96
97 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
98 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
99
100 InjectedField JavaClasses::_injected_fields[] = {
101 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
102 };
103
104 // Register native methods of Object
105 void java_lang_Object::register_natives(TRAPS) {
106 InstanceKlass* obj = vmClasses::Object_klass();
107 Method::register_native(obj, vmSymbols::hashCode_name(),
108 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
109 Method::register_native(obj, vmSymbols::wait_name(),
110 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
111 Method::register_native(obj, vmSymbols::notify_name(),
112 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
113 Method::register_native(obj, vmSymbols::notifyAll_name(),
114 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
115 Method::register_native(obj, vmSymbols::clone_name(),
116 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
117 }
118
119 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
120 return _injected_fields[(int)id].compute_offset();
121 }
122
123 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
124 *field_count = 0;
125
126 vmSymbolID sid = vmSymbols::find_sid(class_name);
127 if (sid == vmSymbolID::NO_SID) {
128 // Only well known classes can inject fields
129 return nullptr;
130 }
131
132 int count = 0;
133 int start = -1;
134
135 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
136 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \
137 count++; \
138 if (start == -1) { \
139 start = (int)InjectedFieldID::klass##_##name##_enum; \
140 } \
141 }
142 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
143 #undef LOOKUP_INJECTED_FIELD
144
145 if (start != -1) {
146 *field_count = count;
147 return _injected_fields + start;
148 }
149 return nullptr;
150 }
151
152
153 // Helpful routine for computing field offsets at run time rather than hardcoding them
154 // Finds local fields only, including static fields. Static field offsets are from the
155 // beginning of the mirror.
156 void JavaClasses::compute_offset(int &dest_offset,
157 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
158 bool is_static) {
159 fieldDescriptor fd;
160 if (ik == nullptr) {
161 ResourceMark rm;
162 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
163 vm_exit_during_initialization("Invalid layout of well-known class");
164 }
165
166 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
167 ResourceMark rm;
168 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
169 name_symbol->as_C_string(), signature_symbol->as_C_string());
170 #ifndef PRODUCT
171 // Prints all fields and offsets
172 Log(class) lt;
173 LogStream ls(lt.error());
174 ik->print_on(&ls);
175 #endif //PRODUCT
176 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
177 }
178 dest_offset = fd.offset();
179 }
180
181 // Overloading to pass name as a string.
182 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
183 const char* name_string, Symbol* signature_symbol,
184 bool is_static) {
185 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
186 if (name == nullptr) {
187 ResourceMark rm;
188 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
189 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
190 }
191 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
192 }
193
194 // java_lang_String
195
196 int java_lang_String::_value_offset;
197 int java_lang_String::_hash_offset;
198 int java_lang_String::_hashIsZero_offset;
199 int java_lang_String::_coder_offset;
200 int java_lang_String::_flags_offset;
201
202 bool java_lang_String::_initialized;
203
204
205 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
206 uint8_t* addr = flags_addr(java_string);
207 uint8_t value = AtomicAccess::load(addr);
208 while ((value & flag_mask) == 0) {
209 uint8_t old_value = value;
210 value |= flag_mask;
211 value = AtomicAccess::cmpxchg(addr, old_value, value);
212 if (value == old_value) return false; // Flag bit changed from 0 to 1.
213 }
214 return true; // Flag bit is already 1.
215 }
216
217 #define STRING_FIELDS_DO(macro) \
218 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
219 macro(_hash_offset, k, "hash", int_signature, false); \
220 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
221 macro(_coder_offset, k, "coder", byte_signature, false);
222
223 void java_lang_String::compute_offsets() {
224 if (_initialized) {
225 return;
226 }
227
228 InstanceKlass* k = vmClasses::String_klass();
229 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
230 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
231
232 _initialized = true;
233 }
234
235 #if INCLUDE_CDS
236 void java_lang_String::serialize_offsets(SerializeClosure* f) {
237 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
238 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
239 f->do_bool(&_initialized);
240 }
241 #endif
242
243 class CompactStringsFixup : public FieldClosure {
244 private:
245 bool _value;
246
247 public:
248 CompactStringsFixup(bool value) : _value(value) {}
249
250 void do_field(fieldDescriptor* fd) {
251 if (fd->name() == vmSymbols::compact_strings_name()) {
252 oop mirror = fd->field_holder()->java_mirror();
253 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String");
254 assert(mirror != nullptr, "String must have mirror already");
255 mirror->bool_field_put(fd->offset(), _value);
256 }
257 }
258 };
259
260 void java_lang_String::set_compact_strings(bool value) {
261 CompactStringsFixup fix(value);
262 vmClasses::String_klass()->do_local_static_fields(&fix);
263 }
264
265 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
266 assert(_initialized, "Must be initialized");
267 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
268
269 // Create the String object first, so there's a chance that the String
270 // and the char array it points to end up in the same cache line.
271 oop obj;
272 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH);
273
274 // Create the char array. The String object must be handlized here
275 // because GC can happen as a result of the allocation attempt.
276 Handle h_obj(THREAD, obj);
277 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
278 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
279
280 // Point the String at the char array
281 obj = h_obj();
282 set_value(obj, buffer);
283 // No need to zero the offset, allocation zero'ed the entire String object
284 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
285 return h_obj;
286 }
287
288 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
289 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
290 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
291 typeArrayOop buffer = value(h_obj());
292 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
293 if (is_latin1) {
294 for (int index = 0; index < length; index++) {
295 buffer->byte_at_put(index, (jbyte)unicode[index]);
296 }
297 } else {
298 for (int index = 0; index < length; index++) {
299 buffer->char_at_put(index, unicode[index]);
300 }
301 }
302
303 #ifdef ASSERT
304 {
305 ResourceMark rm;
306 size_t utf8_len = static_cast<size_t>(length);
307 char* expected = UNICODE::as_utf8(unicode, utf8_len);
308 char* actual = as_utf8_string(h_obj());
309 if (strcmp(expected, actual) != 0) {
310 fatal("Unicode conversion failure: %s --> %s", expected, actual);
311 }
312 }
313 #endif
314
315 return h_obj;
316 }
317
318 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
319 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
320 return h_obj();
321 }
322
323 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
324 if (utf8_str == nullptr) {
325 return Handle();
326 }
327 bool has_multibyte, is_latin1;
328 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
329 if (!CompactStrings) {
330 has_multibyte = true;
331 is_latin1 = false;
332 }
333
334 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
335 if (length > 0) {
336 if (!has_multibyte) {
337 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
338 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
339 } else if (is_latin1) {
340 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
341 } else {
342 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
343 }
344 }
345
346 #ifdef ASSERT
347 // This check is too strict when the input string is not a valid UTF8.
348 // For example, it may be created with arbitrary content via jni_NewStringUTF.
349 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, strlen(utf8_str), /*version_leq_47*/false)) {
350 ResourceMark rm;
351 const char* expected = utf8_str;
352 char* actual = as_utf8_string(h_obj());
353 if (strcmp(expected, actual) != 0) {
354 fatal("String conversion failure: %s --> %s", expected, actual);
355 }
356 }
357 #endif
358
359 return h_obj;
360 }
361
362 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
363 Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
364 return h_obj();
365 }
366
367 Handle java_lang_String::create_from_symbol(const Symbol* symbol, TRAPS) {
368 const char* utf8_str = (char*)symbol->bytes();
369 int utf8_len = symbol->utf8_length();
370
371 bool has_multibyte, is_latin1;
372 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
373 if (!CompactStrings) {
374 has_multibyte = true;
375 is_latin1 = false;
376 }
377
378 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
379 if (length > 0) {
380 if (!has_multibyte) {
381 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
382 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
383 } else if (is_latin1) {
384 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
385 } else {
386 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
387 }
388 }
389
390 #ifdef ASSERT
391 // This check is too strict on older classfile versions
392 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, utf8_len, /*version_leq_47*/false))
393 {
394 ResourceMark rm;
395 const char* expected = symbol->as_utf8();
396 char* actual = as_utf8_string(h_obj());
397 if (strncmp(expected, actual, utf8_len) != 0) {
398 fatal("Symbol conversion failure: %s --> %s", expected, actual);
399 }
400 }
401 #endif
402
403 return h_obj;
404 }
405
406 // Converts a C string to a Java String based on current encoding
407 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
408 assert(str != nullptr, "bad arguments");
409
410 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
411 static to_java_string_fn_t _to_java_string_fn = nullptr;
412
413 if (_to_java_string_fn == nullptr) {
414 void *lib_handle = os::native_java_library();
415 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
416 if (_to_java_string_fn == nullptr) {
417 fatal("JNU_NewStringPlatform missing");
418 }
419 }
420
421 jstring js = nullptr;
422 {
423 JavaThread* thread = THREAD;
424 HandleMark hm(thread);
425 ThreadToNativeFromVM ttn(thread);
426 js = (_to_java_string_fn)(thread->jni_environment(), str);
427 }
428
429 Handle native_platform_string(THREAD, JNIHandles::resolve(js));
430 JNIHandles::destroy_local(js); // destroy local JNIHandle.
431 return native_platform_string;
432 }
433
434 // Converts a Java String to a native C string that can be used for
435 // native OS calls.
436 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
437 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
438 static to_platform_string_fn_t _to_platform_string_fn = nullptr;
439
440 if (_to_platform_string_fn == nullptr) {
441 void *lib_handle = os::native_java_library();
442 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
443 if (_to_platform_string_fn == nullptr) {
444 fatal("GetStringPlatformChars missing");
445 }
446 }
447
448 char *native_platform_string;
449 jstring js;
450 { JavaThread* thread = THREAD;
451 js = (jstring) JNIHandles::make_local(thread, java_string());
452 HandleMark hm(thread);
453 ThreadToNativeFromVM ttn(thread);
454 JNIEnv *env = thread->jni_environment();
455 bool is_copy;
456 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
457 assert(is_copy == JNI_TRUE, "is_copy value changed");
458 }
459
460 // Uses a store barrier and therefore needs to be in vm state
461 JNIHandles::destroy_local(js);
462
463 return native_platform_string;
464 }
465
466 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
467 ResourceMark rm(THREAD);
468 return create_from_str(java_name->as_klass_external_name(), THREAD);
469 }
470
471 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
472 jchar* result = as_unicode_string_or_null(java_string, length);
473 if (result == nullptr) {
474 THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
475 }
476 return result;
477 }
478
479 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
480 typeArrayOop value = java_lang_String::value(java_string);
481 length = java_lang_String::length(java_string, value);
482 bool is_latin1 = java_lang_String::is_latin1(java_string);
483
484 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
485 if (result != nullptr) {
486 if (!is_latin1) {
487 for (int index = 0; index < length; index++) {
488 result[index] = value->char_at(index);
489 }
490 } else {
491 for (int index = 0; index < length; index++) {
492 result[index] = ((jchar) value->byte_at(index)) & 0xff;
493 }
494 }
495 }
496 return result;
497 }
498
499 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
500 // The hash and hashIsZero fields are subject to a benign data race,
501 // making it crucial to ensure that any observable result of the
502 // calculation in this method stays correct under any possible read of
503 // these fields. Necessary restrictions to allow this to be correct
504 // without explicit memory fences or similar concurrency primitives is
505 // that we can ever only write to one of these two fields for a given
506 // String instance, and that the computation is idempotent and derived
507 // from immutable state
508 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
509 if (java_lang_String::hash_is_set(java_string)) {
510 return java_string->int_field(_hash_offset);
511 }
512
513 typeArrayOop value = java_lang_String::value(java_string);
514 int length = java_lang_String::length(java_string, value);
515 bool is_latin1 = java_lang_String::is_latin1(java_string);
516
517 unsigned int hash = 0;
518 if (length > 0) {
519 if (is_latin1) {
520 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
521 } else {
522 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
523 }
524 }
525
526 if (update) {
527 if (hash != 0) {
528 java_string->int_field_put(_hash_offset, hash);
529 } else {
530 java_string->bool_field_put(_hashIsZero_offset, true);
531 }
532 }
533 return hash;
534 }
535
536 unsigned int java_lang_String::hash_code(oop java_string) {
537 return hash_code_impl(java_string, /*update=*/true);
538 }
539
540 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
541 return hash_code_impl(java_string, /*update=*/false);
542 }
543
544
545 char* java_lang_String::as_quoted_ascii(oop java_string) {
546 typeArrayOop value = java_lang_String::value(java_string);
547 int length = java_lang_String::length(java_string, value);
548 bool is_latin1 = java_lang_String::is_latin1(java_string);
549
550 if (length == 0) return nullptr;
551
552 char* result;
553 size_t result_length;
554 if (!is_latin1) {
555 jchar* base = value->char_at_addr(0);
556 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
557 result = NEW_RESOURCE_ARRAY(char, result_length);
558 UNICODE::as_quoted_ascii(base, length, result, result_length);
559 } else {
560 jbyte* base = value->byte_at_addr(0);
561 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
562 result = NEW_RESOURCE_ARRAY(char, result_length);
563 UNICODE::as_quoted_ascii(base, length, result, result_length);
564 }
565 assert(result_length >= (size_t)length + 1, "must not be shorter");
566 assert(result_length == strlen(result) + 1, "must match");
567 return result;
568 }
569
570 Symbol* java_lang_String::as_symbol(oop java_string) {
571 typeArrayOop value = java_lang_String::value(java_string);
572 int length = java_lang_String::length(java_string, value);
573 bool is_latin1 = java_lang_String::is_latin1(java_string);
574 if (!is_latin1) {
575 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
576 Symbol* sym = SymbolTable::new_symbol(base, length);
577 return sym;
578 } else {
579 ResourceMark rm;
580 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
581 size_t utf8_len = static_cast<size_t>(length);
582 const char* base = UNICODE::as_utf8(position, utf8_len);
583 Symbol* sym = SymbolTable::new_symbol(base, checked_cast<int>(utf8_len));
584 return sym;
585 }
586 }
587
588 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
589 typeArrayOop value = java_lang_String::value(java_string);
590 int length = java_lang_String::length(java_string, value);
591 bool is_latin1 = java_lang_String::is_latin1(java_string);
592 if (!is_latin1) {
593 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
594 return SymbolTable::probe_unicode(base, length);
595 } else {
596 ResourceMark rm;
597 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
598 size_t utf8_len = static_cast<size_t>(length);
599 const char* base = UNICODE::as_utf8(position, utf8_len);
600 return SymbolTable::probe(base, checked_cast<int>(utf8_len));
601 }
602 }
603
604 size_t java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
605 assert(value_equals(value, java_lang_String::value(java_string)),
606 "value must be same as java_lang_String::value(java_string)");
607 int length = java_lang_String::length(java_string, value);
608 if (length == 0) {
609 return 0;
610 }
611 if (!java_lang_String::is_latin1(java_string)) {
612 return UNICODE::utf8_length(value->char_at_addr(0), length);
613 } else {
614 return UNICODE::utf8_length(value->byte_at_addr(0), length);
615 }
616 }
617
618 size_t java_lang_String::utf8_length(oop java_string) {
619 typeArrayOop value = java_lang_String::value(java_string);
620 return utf8_length(java_string, value);
621 }
622
623 int java_lang_String::utf8_length_as_int(oop java_string) {
624 typeArrayOop value = java_lang_String::value(java_string);
625 return utf8_length_as_int(java_string, value);
626 }
627
628 int java_lang_String::utf8_length_as_int(oop java_string, typeArrayOop value) {
629 assert(value_equals(value, java_lang_String::value(java_string)),
630 "value must be same as java_lang_String::value(java_string)");
631 int length = java_lang_String::length(java_string, value);
632 if (length == 0) {
633 return 0;
634 }
635 if (!java_lang_String::is_latin1(java_string)) {
636 return UNICODE::utf8_length_as_int(value->char_at_addr(0), length);
637 } else {
638 return UNICODE::utf8_length_as_int(value->byte_at_addr(0), length);
639 }
640 }
641
642 char* java_lang_String::as_utf8_string(oop java_string) {
643 size_t length;
644 return as_utf8_string(java_string, length);
645 }
646
647 char* java_lang_String::as_utf8_string(oop java_string, size_t& length) {
648 typeArrayOop value = java_lang_String::value(java_string);
649 // `length` is used as the incoming number of characters to
650 // convert, and then set as the number of bytes in the UTF8 sequence.
651 length = java_lang_String::length(java_string, value);
652 bool is_latin1 = java_lang_String::is_latin1(java_string);
653 if (!is_latin1) {
654 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
655 return UNICODE::as_utf8(position, length);
656 } else {
657 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
658 return UNICODE::as_utf8(position, length);
659 }
660 }
661
662 // Uses a provided buffer if it's sufficiently large, otherwise allocates
663 // a resource array to fit
664 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& utf8_len) {
665 typeArrayOop value = java_lang_String::value(java_string);
666 int len = java_lang_String::length(java_string, value);
667 bool is_latin1 = java_lang_String::is_latin1(java_string);
668 if (!is_latin1) {
669 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
670 utf8_len = UNICODE::utf8_length(position, len);
671 if (utf8_len >= buflen) {
672 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
673 }
674 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
675 } else {
676 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
677 utf8_len = UNICODE::utf8_length(position, len);
678 if (utf8_len >= buflen) {
679 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
680 }
681 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
682 }
683 }
684
685 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen) {
686 assert(value_equals(value, java_lang_String::value(java_string)),
687 "value must be same as java_lang_String::value(java_string)");
688 int length = java_lang_String::length(java_string, value);
689 bool is_latin1 = java_lang_String::is_latin1(java_string);
690 if (!is_latin1) {
691 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
692 return UNICODE::as_utf8(position, length, buf, buflen);
693 } else {
694 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
695 return UNICODE::as_utf8(position, length, buf, buflen);
696 }
697 }
698
699 char* java_lang_String::as_utf8_string(oop java_string, char* buf, size_t buflen) {
700 typeArrayOop value = java_lang_String::value(java_string);
701 return as_utf8_string(java_string, value, buf, buflen);
702 }
703
704 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
705 // `length` is used as the incoming number of characters to
706 // convert, and then set as the number of bytes in the UTF8 sequence.
707 size_t length = static_cast<size_t>(len);
708 typeArrayOop value = java_lang_String::value(java_string);
709 bool is_latin1 = java_lang_String::is_latin1(java_string);
710 assert(start + len <= java_lang_String::length(java_string), "just checking");
711 if (!is_latin1) {
712 jchar* position = value->char_at_addr(start);
713 return UNICODE::as_utf8(position, length);
714 } else {
715 jbyte* position = value->byte_at_addr(start);
716 return UNICODE::as_utf8(position, length);
717 }
718 }
719
720 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen) {
721 assert(value_equals(value, java_lang_String::value(java_string)),
722 "value must be same as java_lang_String::value(java_string)");
723 assert(start + len <= java_lang_String::length(java_string), "just checking");
724 bool is_latin1 = java_lang_String::is_latin1(java_string);
725 if (!is_latin1) {
726 jchar* position = value->char_at_addr(start);
727 return UNICODE::as_utf8(position, len, buf, buflen);
728 } else {
729 jbyte* position = value->byte_at_addr(start);
730 return UNICODE::as_utf8(position, len, buf, buflen);
731 }
732 }
733
734 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
735 assert(java_string->klass() == vmClasses::String_klass(),
736 "must be java_string");
737 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
738 int length = java_lang_String::length(java_string, value);
739 if (length != len) {
740 return false;
741 }
742 bool is_latin1 = java_lang_String::is_latin1(java_string);
743 if (!is_latin1) {
744 for (int i = 0; i < len; i++) {
745 if (value->char_at(i) != chars[i]) {
746 return false;
747 }
748 }
749 } else {
750 for (int i = 0; i < len; i++) {
751 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
752 return false;
753 }
754 }
755 }
756 return true;
757 }
758
759 bool java_lang_String::equals(oop java_string, const char* utf8_string, size_t utf8_len) {
760 assert(java_string->klass() == vmClasses::String_klass(),
761 "must be java_string");
762 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
763 int length = java_lang_String::length(java_string, value);
764 int unicode_length = UTF8::unicode_length(utf8_string, utf8_len);
765 if (length != unicode_length) {
766 return false;
767 }
768 bool is_latin1 = java_lang_String::is_latin1(java_string);
769 jchar c;
770 if (!is_latin1) {
771 for (int i = 0; i < unicode_length; i++) {
772 utf8_string = UTF8::next(utf8_string, &c);
773 if (value->char_at(i) != c) {
774 return false;
775 }
776 }
777 } else {
778 for (int i = 0; i < unicode_length; i++) {
779 utf8_string = UTF8::next(utf8_string, &c);
780 if ((((jchar) value->byte_at(i)) & 0xff) != c) {
781 return false;
782 }
783 }
784 }
785 return true;
786 }
787
788 bool java_lang_String::equals(oop str1, oop str2) {
789 assert(str1->klass() == vmClasses::String_klass(),
790 "must be java String");
791 assert(str2->klass() == vmClasses::String_klass(),
792 "must be java String");
793 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
794 bool is_latin1 = java_lang_String::is_latin1(str1);
795 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
796 bool is_latin2 = java_lang_String::is_latin1(str2);
797
798 if (is_latin1 != is_latin2) {
799 // Strings with different coders are never equal.
800 return false;
801 }
802 return value_equals(value1, value2);
803 }
804
805 // Print the given string to the given outputStream, limiting the output to
806 // at most max_length of the string's characters. If the length exceeds the
807 // limit we print an abridged version of the string with the "middle" elided
808 // and replaced by " ... (N characters ommitted) ... ". If max_length is odd
809 // it is treated as max_length-1.
810 void java_lang_String::print(oop java_string, outputStream* st, int max_length) {
811 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
812 // We need at least two characters to print A ... B
813 assert(max_length > 1, "invalid max_length: %d", max_length);
814
815 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
816
817 if (value == nullptr) {
818 // This can happen if, e.g., printing a String
819 // object before its initializer has been called
820 st->print("nullptr");
821 return;
822 }
823
824 int length = java_lang_String::length(java_string, value);
825 bool is_latin1 = java_lang_String::is_latin1(java_string);
826
827 bool abridge = length > max_length;
828
829 st->print("\"");
830 for (int index = 0; index < length; index++) {
831 // If we need to abridge and we've printed half the allowed characters
832 // then jump to the tail of the string.
833 if (abridge && index >= max_length / 2) {
834 st->print(" ... (%d characters ommitted) ... ", length - 2 * (max_length / 2));
835 index = length - (max_length / 2);
836 abridge = false; // only do this once
837 }
838 jchar c = (!is_latin1) ? value->char_at(index) :
839 ((jchar) value->byte_at(index)) & 0xff;
840 if (c < ' ') {
841 st->print("\\x%02X", c); // print control characters e.g. \x0A
842 } else {
843 st->print("%c", c);
844 }
845 }
846 st->print("\"");
847
848 if (length > max_length) {
849 st->print(" (abridged) ");
850 }
851 }
852
853 // java_lang_Class
854
855 int java_lang_Class::_klass_offset;
856 int java_lang_Class::_array_klass_offset;
857 int java_lang_Class::_oop_size_offset;
858 int java_lang_Class::_static_oop_field_count_offset;
859 int java_lang_Class::_class_loader_offset;
860 int java_lang_Class::_module_offset;
861 int java_lang_Class::_protection_domain_offset;
862 int java_lang_Class::_component_mirror_offset;
863 int java_lang_Class::_init_lock_offset;
864 int java_lang_Class::_signers_offset;
865 int java_lang_Class::_name_offset;
866 int java_lang_Class::_source_file_offset;
867 int java_lang_Class::_classData_offset;
868 int java_lang_Class::_classRedefinedCount_offset;
869 int java_lang_Class::_reflectionData_offset;
870 int java_lang_Class::_modifiers_offset;
871 int java_lang_Class::_is_primitive_offset;
872 int java_lang_Class::_raw_access_flags_offset;
873
874 bool java_lang_Class::_offsets_computed = false;
875 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
876 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
877
878 #ifdef ASSERT
879 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
880 assert(fd->has_initial_value(), "caller should have checked this");
881 assert(fd->field_type() == T_OBJECT, "caller should have checked this");
882 assert(fd->signature() == vmSymbols::string_signature(), "just checking");
883 }
884 #endif
885
886 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
887 DEBUG_ONLY(assert_valid_static_string_field(fd);)
888 oop string = fd->string_initial_value(CHECK);
889 mirror()->obj_field_put(fd->offset(), string);
890 }
891
892 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
893 assert(fd->has_initial_value(), "caller should have checked this");
894 BasicType t = fd->field_type();
895 switch (t) {
896 case T_BYTE:
897 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value()));
898 break;
899 case T_BOOLEAN:
900 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value()));
901 break;
902 case T_CHAR:
903 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value()));
904 break;
905 case T_SHORT:
906 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value()));
907 break;
908 case T_INT:
909 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
910 break;
911 case T_FLOAT:
912 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
913 break;
914 case T_DOUBLE:
915 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
916 break;
917 case T_LONG:
918 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
919 break;
920 default:
921 // Illegal ConstantValue attribute in class file should have been
922 // caught during classfile parsing.
923 ShouldNotReachHere();
924 }
925 }
926
927 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
928 assert(mirror.not_null() && fd->is_static(), "just checking");
929 if (fd->has_initial_value()) {
930 if (fd->field_type() != T_OBJECT) {
931 initialize_static_primitive_field(fd, mirror);
932 } else {
933 initialize_static_string_field(fd, mirror, CHECK);
934 }
935 }
936 }
937
938 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
939 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
940
941 // If the offset was read from the shared archive, it was fixed up already
942 if (!k->in_aot_cache()) {
943 if (k->is_instance_klass()) {
944 // During bootstrap, java.lang.Class wasn't loaded so static field
945 // offsets were computed without the size added it. Go back and
946 // update all the static field offsets to included the size.
947
948 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
949 // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
950 // static fields offsets are updated in this array before reencoding everything into
951 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
952
953 int java_fields;
954 int injected_fields;
955 InstanceKlass* ik = InstanceKlass::cast(k);
956 GrowableArray<FieldInfo>* fields =
957 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
958 &java_fields, &injected_fields);
959 for (int i = 0; i < fields->length(); i++) {
960 FieldInfo* fi = fields->adr_at(i);
961 if (fi->access_flags().is_static()) {
962 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
963 }
964 }
965 Array<u1>* old_stream = ik->fieldinfo_stream();
966 assert(fields->length() == (java_fields + injected_fields), "Must be");
967 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
968 ik->set_fieldinfo_stream(new_fis);
969 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
970
971 Array<u1>* old_table = ik->fieldinfo_search_table();
972 Array<u1>* search_table = FieldInfoStream::create_search_table(ik->constants(), new_fis, k->class_loader_data(), CHECK);
973 ik->set_fieldinfo_search_table(search_table);
974 MetadataFactory::free_array<u1>(k->class_loader_data(), old_table);
975
976 DEBUG_ONLY(FieldInfoStream::validate_search_table(ik->constants(), new_fis, search_table));
977 }
978 }
979
980 if (k->in_aot_cache() && k->has_archived_mirror_index()) {
981 if (ArchiveHeapLoader::is_in_use()) {
982 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
983 assert(present, "Missing archived mirror for %s", k->external_name());
984 return;
985 } else {
986 k->clear_java_mirror_handle();
987 k->clear_archived_mirror_index();
988 }
989 }
990 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
991 }
992
993 void java_lang_Class::initialize_mirror_fields(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 create_scratch_mirror(k, CHECK);
1160 }
1161 } else {
1162 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1163 fixup_mirror_list()->push(k);
1164 }
1165 }
1166
1167 #if INCLUDE_CDS_JAVA_HEAP
1168 // The "scratch mirror" stores the states of the mirror object that can be
1169 // decided at dump time (such as the initial values of the static fields, the
1170 // component mirror, etc). At runtime, more information is added to it by
1171 // java_lang_Class::restore_archived_mirror().
1172 //
1173 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1174 // produces the same result as /*runtime*/create_mirror().
1175 //
1176 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1177 // latter may contain dumptime-specific information that cannot be archived
1178 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1179 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1180 if (k->class_loader() != nullptr &&
1181 k->class_loader() != SystemDictionary::java_platform_loader() &&
1182 k->class_loader() != SystemDictionary::java_system_loader()) {
1183 // We only archive the mirrors of classes loaded by the built-in loaders
1184 return;
1185 }
1186
1187 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1188 Handle mirror;
1189 Handle comp_mirror;
1190 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1191
1192 if (comp_mirror() != nullptr) {
1193 release_set_array_klass(comp_mirror(), k);
1194 }
1195
1196 HeapShared::set_scratch_java_mirror(k, mirror());
1197 }
1198
1199 // Returns true if the mirror is updated, false if no archived mirror
1200 // data is present. After the archived mirror object is restored, the
1201 // shared klass' _has_raw_archived_mirror flag is cleared.
1202 bool java_lang_Class::restore_archived_mirror(Klass *k,
1203 Handle class_loader, Handle module,
1204 Handle protection_domain, TRAPS) {
1205 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1206 // see more details in vmClasses::resolve_all().
1207 if (!vmClasses::Class_klass_loaded()) {
1208 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1209 fixup_mirror_list()->push(k);
1210 return true;
1211 }
1212
1213 oop m = k->archived_java_mirror();
1214 assert(m != nullptr, "must have stored non-null archived mirror");
1215
1216 // Sanity: clear it now to prevent re-initialization if any of the following fails
1217 k->clear_archived_mirror_index();
1218
1219 // mirror is archived, restore
1220 log_debug(aot, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1221 assert(as_Klass(m) == k, "must be");
1222 Handle mirror(THREAD, m);
1223
1224 if (!k->is_array_klass()) {
1225 // - local static final fields with initial values were initialized at dump time
1226
1227 // create the init_lock
1228 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1229 set_init_lock(mirror(), r);
1230
1231 if (protection_domain.not_null()) {
1232 set_protection_domain(mirror(), protection_domain());
1233 }
1234 }
1235
1236 assert(class_loader() == k->class_loader(), "should be same");
1237 if (class_loader.not_null()) {
1238 set_class_loader(mirror(), class_loader());
1239 }
1240
1241 k->set_java_mirror(mirror);
1242
1243 set_mirror_module_field(THREAD, k, mirror, module);
1244
1245 if (log_is_enabled(Trace, aot, heap, mirror)) {
1246 ResourceMark rm(THREAD);
1247 log_trace(aot, heap, mirror)(
1248 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1249 }
1250
1251 return true;
1252 }
1253 #endif // INCLUDE_CDS_JAVA_HEAP
1254
1255 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1256 assert(_module_offset != 0, "must have been computed already");
1257 set_module(k->java_mirror(), module());
1258 }
1259
1260 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1261 assert(_oop_size_offset != 0, "must be set");
1262 assert(size > 0, "Oop size must be greater than zero, not %zu", size);
1263 assert(size <= INT_MAX, "Lossy conversion: %zu", size);
1264 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1265 }
1266
1267 int java_lang_Class::static_oop_field_count(oop java_class) {
1268 assert(_static_oop_field_count_offset != 0, "must be set");
1269 return java_class->int_field(_static_oop_field_count_offset);
1270 }
1271
1272 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1273 assert(_static_oop_field_count_offset != 0, "must be set");
1274 java_class->int_field_put(_static_oop_field_count_offset, size);
1275 }
1276
1277 oop java_lang_Class::protection_domain(oop java_class) {
1278 assert(_protection_domain_offset != 0, "must be set");
1279 return java_class->obj_field(_protection_domain_offset);
1280 }
1281 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1282 assert(_protection_domain_offset != 0, "must be set");
1283 java_class->obj_field_put(_protection_domain_offset, pd);
1284 }
1285
1286 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1287 assert(_component_mirror_offset != 0, "must be set");
1288 assert(java_lang_Class::as_Klass(java_class) != nullptr &&
1289 java_lang_Class::as_Klass(java_class)->is_array_klass(), "must be");
1290 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1291 }
1292
1293 oop java_lang_Class::component_mirror(oop java_class) {
1294 assert(_component_mirror_offset != 0, "must be set");
1295 return java_class->obj_field(_component_mirror_offset);
1296 }
1297
1298 oop java_lang_Class::init_lock(oop java_class) {
1299 assert(_init_lock_offset != 0, "must be set");
1300 return java_class->obj_field(_init_lock_offset);
1301 }
1302 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1303 assert(_init_lock_offset != 0, "must be set");
1304 java_class->obj_field_put(_init_lock_offset, init_lock);
1305 }
1306
1307 objArrayOop java_lang_Class::signers(oop java_class) {
1308 assert(_signers_offset != 0, "must be set");
1309 return (objArrayOop)java_class->obj_field(_signers_offset);
1310 }
1311
1312 oop java_lang_Class::class_data(oop java_class) {
1313 assert(_classData_offset != 0, "must be set");
1314 return java_class->obj_field(_classData_offset);
1315 }
1316 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1317 assert(_classData_offset != 0, "must be set");
1318 java_class->obj_field_put(_classData_offset, class_data);
1319 }
1320
1321 void java_lang_Class::set_reflection_data(oop java_class, oop reflection_data) {
1322 assert(_reflectionData_offset != 0, "must be set");
1323 java_class->obj_field_put(_reflectionData_offset, reflection_data);
1324 }
1325
1326 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1327 assert(_class_loader_offset != 0, "offsets should have been initialized");
1328 java_class->obj_field_put(_class_loader_offset, loader);
1329 }
1330
1331 oop java_lang_Class::class_loader(oop java_class) {
1332 assert(_class_loader_offset != 0, "must be set");
1333 return java_class->obj_field(_class_loader_offset);
1334 }
1335
1336 oop java_lang_Class::module(oop java_class) {
1337 assert(_module_offset != 0, "must be set");
1338 return java_class->obj_field(_module_offset);
1339 }
1340
1341 void java_lang_Class::set_module(oop java_class, oop module) {
1342 assert(_module_offset != 0, "must be set");
1343 java_class->obj_field_put(_module_offset, module);
1344 }
1345
1346 oop java_lang_Class::name(Handle java_class, TRAPS) {
1347 assert(_name_offset != 0, "must be set");
1348 oop o = java_class->obj_field(_name_offset);
1349 if (o == nullptr) {
1350 o = StringTable::intern(as_external_name(java_class()), THREAD);
1351 java_class->obj_field_put(_name_offset, o);
1352 }
1353 return o;
1354 }
1355
1356 oop java_lang_Class::source_file(oop java_class) {
1357 assert(_source_file_offset != 0, "must be set");
1358 return java_class->obj_field(_source_file_offset);
1359 }
1360
1361 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1362 assert(_source_file_offset != 0, "must be set");
1363 java_class->obj_field_put(_source_file_offset, source_file);
1364 }
1365
1366 void java_lang_Class::set_is_primitive(oop java_class) {
1367 assert(_is_primitive_offset != 0, "must be set");
1368 java_class->bool_field_put(_is_primitive_offset, true);
1369 }
1370
1371
1372 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1373 // Mirrors for basic types have a null klass field, which makes them special.
1374 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1375 if (type != T_VOID) {
1376 Klass* aklass = Universe::typeArrayKlass(type);
1377 assert(aklass != nullptr, "correct bootstrap");
1378 release_set_array_klass(java_class, aklass);
1379 }
1380 #ifdef ASSERT
1381 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1382 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1383 #endif
1384 set_modifiers(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
1385 set_raw_access_flags(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
1386
1387 set_is_primitive(java_class);
1388 return java_class;
1389 }
1390
1391 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1392 assert(is_instance(java_class), "must be a Class object");
1393 java_class->metadata_field_put(_klass_offset, klass);
1394 }
1395
1396
1397 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1398 assert(is_instance(java_class), "must be a Class object");
1399 Symbol* name = nullptr;
1400 bool is_instance = false;
1401 if (is_primitive(java_class)) {
1402 name = vmSymbols::type_signature(primitive_type(java_class));
1403 } else {
1404 Klass* k = as_Klass(java_class);
1405 is_instance = k->is_instance_klass();
1406 name = k->name();
1407 }
1408 if (name == nullptr) {
1409 st->print("<null>");
1410 return;
1411 }
1412 if (is_instance) st->print("L");
1413 st->write((char*) name->base(), (int) name->utf8_length());
1414 if (is_instance) st->print(";");
1415 }
1416
1417 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1418 assert(is_instance(java_class), "must be a Class object");
1419 Symbol* name;
1420 if (is_primitive(java_class)) {
1421 name = vmSymbols::type_signature(primitive_type(java_class));
1422 // Because this can create a new symbol, the caller has to decrement
1423 // the refcount, so make adjustment here and below for symbols returned
1424 // that are not created or incremented due to a successful lookup.
1425 name->increment_refcount();
1426 } else {
1427 Klass* k = as_Klass(java_class);
1428 if (!k->is_instance_klass()) {
1429 name = k->name();
1430 name->increment_refcount();
1431 } else {
1432 ResourceMark rm;
1433 const char* sigstr = k->signature_name();
1434 int siglen = (int) strlen(sigstr);
1435 if (!intern_if_not_found) {
1436 name = SymbolTable::probe(sigstr, siglen);
1437 } else {
1438 name = SymbolTable::new_symbol(sigstr, siglen);
1439 }
1440 }
1441 }
1442 return name;
1443 }
1444
1445 // Returns the Java name for this Java mirror (Resource allocated)
1446 // See Klass::external_name().
1447 // For primitive type Java mirrors, its type name is returned.
1448 const char* java_lang_Class::as_external_name(oop java_class) {
1449 assert(is_instance(java_class), "must be a Class object");
1450 const char* name = nullptr;
1451 if (is_primitive(java_class)) {
1452 name = type2name(primitive_type(java_class));
1453 } else {
1454 name = as_Klass(java_class)->external_name();
1455 }
1456 if (name == nullptr) {
1457 name = "<null>";
1458 }
1459 return name;
1460 }
1461
1462 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1463 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1464 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass");
1465 return k;
1466 }
1467
1468
1469 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1470 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1471 java_class->release_metadata_field_put(_array_klass_offset, klass);
1472 }
1473
1474
1475 BasicType java_lang_Class::primitive_type(oop java_class) {
1476 assert(is_primitive(java_class), "just checking");
1477 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1478 BasicType type = T_VOID;
1479 if (ak != nullptr) {
1480 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1481 type = ArrayKlass::cast(ak)->element_type();
1482 } else {
1483 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1484 }
1485 #ifdef ASSERT
1486 if (CDSConfig::is_dumping_heap()) {
1487 oop mirror = Universe::java_mirror(type);
1488 oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1489 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1490 } else {
1491 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1492 }
1493 #endif
1494 return type;
1495 }
1496
1497 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1498 assert(is_instance(java_class), "must be a Class object");
1499 if (is_primitive(java_class)) {
1500 if (reference_klass != nullptr)
1501 (*reference_klass) = nullptr;
1502 return primitive_type(java_class);
1503 } else {
1504 if (reference_klass != nullptr)
1505 (*reference_klass) = as_Klass(java_class);
1506 return T_OBJECT;
1507 }
1508 }
1509
1510
1511 oop java_lang_Class::primitive_mirror(BasicType t) {
1512 oop mirror = Universe::java_mirror(t);
1513 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1514 assert(is_primitive(mirror), "must be primitive");
1515 return mirror;
1516 }
1517
1518 #define CLASS_FIELDS_DO(macro) \
1519 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1520 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1521 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1522 macro(_module_offset, k, "module", module_signature, false); \
1523 macro(_name_offset, k, "name", string_signature, false); \
1524 macro(_classData_offset, k, "classData", object_signature, false); \
1525 macro(_reflectionData_offset, k, "reflectionData", java_lang_ref_SoftReference_signature, false); \
1526 macro(_signers_offset, k, "signers", object_array_signature, false); \
1527 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), char_signature, false); \
1528 macro(_raw_access_flags_offset, k, "classFileAccessFlags", char_signature, false); \
1529 macro(_protection_domain_offset, k, "protectionDomain", java_security_ProtectionDomain_signature, false); \
1530 macro(_is_primitive_offset, k, "primitive", bool_signature, false);
1531
1532 void java_lang_Class::compute_offsets() {
1533 if (_offsets_computed) {
1534 return;
1535 }
1536
1537 _offsets_computed = true;
1538
1539 InstanceKlass* k = vmClasses::Class_klass();
1540 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1541 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1542 }
1543
1544 #if INCLUDE_CDS
1545 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1546 f->do_bool(&_offsets_computed);
1547
1548 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1549
1550 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1551 }
1552 #endif
1553
1554 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1555 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1556 return the_class_mirror->int_field(_classRedefinedCount_offset);
1557 }
1558
1559 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1560 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1561 the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1562 }
1563
1564 int java_lang_Class::modifiers(oop the_class_mirror) {
1565 assert(_modifiers_offset != 0, "offsets should have been initialized");
1566 return the_class_mirror->char_field(_modifiers_offset);
1567 }
1568
1569 void java_lang_Class::set_modifiers(oop the_class_mirror, u2 value) {
1570 assert(_modifiers_offset != 0, "offsets should have been initialized");
1571 the_class_mirror->char_field_put(_modifiers_offset, value);
1572 }
1573
1574 int java_lang_Class::raw_access_flags(oop the_class_mirror) {
1575 assert(_raw_access_flags_offset != 0, "offsets should have been initialized");
1576 return the_class_mirror->char_field(_raw_access_flags_offset);
1577 }
1578
1579 void java_lang_Class::set_raw_access_flags(oop the_class_mirror, u2 value) {
1580 assert(_raw_access_flags_offset != 0, "offsets should have been initialized");
1581 the_class_mirror->char_field_put(_raw_access_flags_offset, value);
1582 }
1583
1584
1585 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1586 // platform thread structure, and a eetop offset which was used for thread
1587 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1588 // merged, so in the HotSpot VM we just use the eetop field for the thread
1589 // instead of the privateInfo_offset.
1590 //
1591 // Note: The stackSize field is only present starting in 1.4.
1592
1593 int java_lang_Thread_FieldHolder::_group_offset;
1594 int java_lang_Thread_FieldHolder::_priority_offset;
1595 int java_lang_Thread_FieldHolder::_stackSize_offset;
1596 int java_lang_Thread_FieldHolder::_daemon_offset;
1597 int java_lang_Thread_FieldHolder::_thread_status_offset;
1598
1599 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1600 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1601 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1602 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1603 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1604 macro(_thread_status_offset, k, "threadStatus", int_signature, false)
1605
1606 void java_lang_Thread_FieldHolder::compute_offsets() {
1607 assert(_group_offset == 0, "offsets should be initialized only once");
1608
1609 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1610 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1611 }
1612
1613 #if INCLUDE_CDS
1614 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1615 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1616 }
1617 #endif
1618
1619 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1620 return holder->obj_field(_group_offset);
1621 }
1622
1623 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1624 return (ThreadPriority)holder->int_field(_priority_offset);
1625 }
1626
1627 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1628 holder->int_field_put(_priority_offset, priority);
1629 }
1630
1631 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1632 return holder->long_field(_stackSize_offset);
1633 }
1634
1635 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1636 return holder->bool_field(_daemon_offset) != 0;
1637 }
1638
1639 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1640 assert(val, "daemon status is never turned off");
1641 holder->bool_field_put(_daemon_offset, val);
1642 }
1643
1644 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1645 holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1646 }
1647
1648 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1649 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1650 }
1651
1652
1653 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1654
1655 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1656 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true);
1657
1658 void java_lang_Thread_Constants::compute_offsets() {
1659 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1660
1661 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1662 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1663 }
1664
1665 #if INCLUDE_CDS
1666 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1667 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1668 }
1669 #endif
1670
1671 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1672 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1673 oop base = k->static_field_base_raw();
1674 return base->obj_field(_static_VTHREAD_GROUP_offset);
1675 }
1676
1677
1678 int java_lang_Thread::_holder_offset;
1679 int java_lang_Thread::_name_offset;
1680 int java_lang_Thread::_contextClassLoader_offset;
1681 int java_lang_Thread::_eetop_offset;
1682 int java_lang_Thread::_jvmti_thread_state_offset;
1683 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1684 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1685 int java_lang_Thread::_interrupted_offset;
1686 int java_lang_Thread::_interruptLock_offset;
1687 int java_lang_Thread::_tid_offset;
1688 int java_lang_Thread::_continuation_offset;
1689 int java_lang_Thread::_park_blocker_offset;
1690 int java_lang_Thread::_scopedValueBindings_offset;
1691 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1692
1693 #define THREAD_FIELDS_DO(macro) \
1694 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \
1695 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1696 macro(_contextClassLoader_offset, k, "contextClassLoader", classloader_signature, false); \
1697 macro(_eetop_offset, k, "eetop", long_signature, false); \
1698 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1699 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \
1700 macro(_tid_offset, k, "tid", long_signature, false); \
1701 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1702 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1703 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1704
1705 void java_lang_Thread::compute_offsets() {
1706 assert(_holder_offset == 0, "offsets should be initialized only once");
1707
1708 InstanceKlass* k = vmClasses::Thread_klass();
1709 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1710 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1711 }
1712
1713 #if INCLUDE_CDS
1714 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1715 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1716 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1717 }
1718 #endif
1719
1720 JavaThread* java_lang_Thread::thread(oop java_thread) {
1721 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1722 }
1723
1724 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1725 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1726 }
1727
1728 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1729 java_thread->address_field_put(_eetop_offset, (address)thread);
1730 }
1731
1732 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1733 java_thread->release_address_field_put(_eetop_offset, (address)thread);
1734 }
1735
1736 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1737 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1738 }
1739
1740 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1741 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1742 }
1743
1744 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1745 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1746 }
1747
1748 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1749 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1750 int val = VTMS_transition_disable_count(java_thread);
1751 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1752 }
1753
1754 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1755 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1756 int val = VTMS_transition_disable_count(java_thread);
1757 assert(val > 0, "VTMS_transition_disable_count should never be negative");
1758 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1759 }
1760
1761 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1762 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1763 }
1764
1765 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1766 assert(is_in_VTMS_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside");
1767 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1768 }
1769
1770 int java_lang_Thread::is_in_VTMS_transition_offset() {
1771 return _jvmti_is_in_VTMS_transition_offset;
1772 }
1773
1774 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1775 assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1776 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1777 }
1778
1779 oop java_lang_Thread::holder(oop java_thread) {
1780 // Note: may return null if the thread is still attaching
1781 return java_thread->obj_field(_holder_offset);
1782 }
1783 oop java_lang_Thread::interrupt_lock(oop java_thread) {
1784 return java_thread->obj_field(_interruptLock_offset);
1785 }
1786
1787 bool java_lang_Thread::interrupted(oop java_thread) {
1788 // Make sure the caller can safely access oops.
1789 assert(Thread::current()->is_VM_thread() ||
1790 (JavaThread::current()->thread_state() != _thread_blocked &&
1791 JavaThread::current()->thread_state() != _thread_in_native),
1792 "Unsafe access to oop");
1793 return java_thread->bool_field_volatile(_interrupted_offset);
1794 }
1795
1796 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1797 // Make sure the caller can safely access oops.
1798 assert(Thread::current()->is_VM_thread() ||
1799 (JavaThread::current()->thread_state() != _thread_blocked &&
1800 JavaThread::current()->thread_state() != _thread_in_native),
1801 "Unsafe access to oop");
1802 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1803 }
1804
1805
1806 oop java_lang_Thread::name(oop java_thread) {
1807 return java_thread->obj_field(_name_offset);
1808 }
1809
1810
1811 void java_lang_Thread::set_name(oop java_thread, oop name) {
1812 java_thread->obj_field_put(_name_offset, name);
1813 }
1814
1815 // Convenience macros for setting and getting Thread fields that
1816 // are actually stored in the FieldHolder object of the thread.
1817 // The FieldHolder can be null whilst a thread is attaching via
1818 // JNI, and when the main thread is attaching.
1819
1820 // The default value should be the default/zero initialized value
1821 // of the field as it would be in java.lang.Thread.FieldHolder.
1822 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \
1823 { \
1824 oop holder = java_lang_Thread::holder(java_thread); \
1825 if (holder != nullptr) \
1826 return java_lang_Thread_FieldHolder::field(holder); \
1827 else \
1828 return default_val; \
1829 }
1830
1831 // We should never be trying to set a field of an attaching thread.
1832 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \
1833 { \
1834 oop holder = java_lang_Thread::holder(java_thread); \
1835 assert(holder != nullptr, "Thread not fully initialized"); \
1836 java_lang_Thread_FieldHolder::set_##field(holder, value); \
1837 }
1838
1839
1840 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1841 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1842 }
1843
1844
1845 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1846 SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1847 }
1848
1849
1850 oop java_lang_Thread::threadGroup(oop java_thread) {
1851 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1852 }
1853
1854
1855 bool java_lang_Thread::is_alive(oop java_thread) {
1856 JavaThread* thr = java_lang_Thread::thread(java_thread);
1857 return (thr != nullptr);
1858 }
1859
1860
1861 bool java_lang_Thread::is_daemon(oop java_thread) {
1862 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1863 }
1864
1865
1866 void java_lang_Thread::set_daemon(oop java_thread) {
1867 SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1868 }
1869
1870 oop java_lang_Thread::context_class_loader(oop java_thread) {
1871 return java_thread->obj_field(_contextClassLoader_offset);
1872 }
1873
1874
1875 jlong java_lang_Thread::stackSize(oop java_thread) {
1876 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1877 }
1878
1879 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1880 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1881 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1882 }
1883
1884 // Read thread status value from threadStatus field in java.lang.Thread java class.
1885 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1886 // Make sure the caller is operating on behalf of the VM or is
1887 // running VM code (state == _thread_in_vm).
1888 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1889 JavaThread::current()->thread_state() == _thread_in_vm ||
1890 JavaThread::current() == java_lang_Thread::thread(java_thread),
1891 "unsafe call to java_lang_Thread::get_thread_status()?");
1892 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1893 }
1894
1895 ByteSize java_lang_Thread::thread_id_offset() {
1896 return in_ByteSize(_tid_offset);
1897 }
1898
1899 oop java_lang_Thread::park_blocker(oop java_thread) {
1900 return java_thread->obj_field_access<MO_RELAXED>(_park_blocker_offset);
1901 }
1902
1903 // Obtain stack trace for platform or mounted virtual thread.
1904 // If jthread is a virtual thread and it has been unmounted (or remounted to different carrier) the method returns null.
1905 // The caller (java.lang.VirtualThread) handles returned nulls via retry.
1906 oop java_lang_Thread::async_get_stack_trace(jobject jthread, TRAPS) {
1907 ThreadsListHandle tlh(THREAD);
1908 JavaThread* java_thread = nullptr;
1909 oop thread_oop;
1910
1911 bool has_java_thread = tlh.cv_internal_thread_to_JavaThread(jthread, &java_thread, &thread_oop);
1912 if (!has_java_thread) {
1913 return nullptr;
1914 }
1915
1916 class GetStackTraceHandshakeClosure : public HandshakeClosure {
1917 public:
1918 const Handle _thread_h;
1919 int _depth;
1920 bool _retry_handshake;
1921 GrowableArray<Method*>* _methods;
1922 GrowableArray<int>* _bcis;
1923
1924 GetStackTraceHandshakeClosure(Handle thread_h) :
1925 HandshakeClosure("GetStackTraceHandshakeClosure"), _thread_h(thread_h), _depth(0), _retry_handshake(false),
1926 _methods(nullptr), _bcis(nullptr) {
1927 }
1928 ~GetStackTraceHandshakeClosure() {
1929 delete _methods;
1930 delete _bcis;
1931 }
1932
1933 bool read_reset_retry() {
1934 bool ret = _retry_handshake;
1935 // If we re-execute the handshake this method need to return false
1936 // when the handshake cannot be performed. (E.g. thread terminating)
1937 _retry_handshake = false;
1938 return ret;
1939 }
1940
1941 void do_thread(Thread* th) {
1942 if (!Thread::current()->is_Java_thread()) {
1943 _retry_handshake = true;
1944 return;
1945 }
1946
1947 JavaThread* java_thread = JavaThread::cast(th);
1948
1949 if (!java_thread->has_last_Java_frame()) {
1950 return;
1951 }
1952
1953 bool carrier = false;
1954 if (java_lang_VirtualThread::is_instance(_thread_h())) {
1955 // Ensure _thread_h is still mounted to java_thread.
1956 const ContinuationEntry* ce = java_thread->vthread_continuation();
1957 if (ce == nullptr || ce->cont_oop(java_thread) != java_lang_VirtualThread::continuation(_thread_h())) {
1958 // Target thread has been unmounted.
1959 return;
1960 }
1961 } else {
1962 carrier = (java_thread->vthread_continuation() != nullptr);
1963 }
1964
1965 const int max_depth = MaxJavaStackTraceDepth;
1966 const bool skip_hidden = !ShowHiddenFrames;
1967
1968 // Pick minimum length that will cover most cases
1969 int init_length = 64;
1970 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1971 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
1972
1973 int total_count = 0;
1974 for (vframeStream vfst(java_thread, false, false, carrier); // we don't process frames as we don't care about oops
1975 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
1976 vfst.next()) {
1977
1978 if (skip_hidden && (vfst.method()->is_hidden() ||
1979 vfst.method()->is_continuation_enter_intrinsic())) {
1980 continue;
1981 }
1982
1983 _methods->push(vfst.method());
1984 _bcis->push(vfst.bci());
1985 total_count++;
1986 }
1987
1988 _depth = total_count;
1989 }
1990 };
1991
1992 // Handshake with target
1993 ResourceMark rm(THREAD);
1994 HandleMark hm(THREAD);
1995 GetStackTraceHandshakeClosure gsthc(Handle(THREAD, thread_oop));
1996 do {
1997 Handshake::execute(&gsthc, &tlh, java_thread);
1998 } while (gsthc.read_reset_retry());
1999
2000 // Stop if no stack trace is found.
2001 if (gsthc._depth == 0) {
2002 return nullptr;
2003 }
2004
2005 // Convert to StackTraceElement array
2006 InstanceKlass* k = vmClasses::StackTraceElement_klass();
2007 assert(k != nullptr, "must be loaded in 1.4+");
2008 if (k->should_be_initialized()) {
2009 k->initialize(CHECK_NULL);
2010 }
2011 objArrayHandle trace = oopFactory::new_objArray_handle(k, gsthc._depth, CHECK_NULL);
2012
2013 for (int i = 0; i < gsthc._depth; i++) {
2014 methodHandle method(THREAD, gsthc._methods->at(i));
2015 oop element = java_lang_StackTraceElement::create(method,
2016 gsthc._bcis->at(i),
2017 CHECK_NULL);
2018 trace->obj_at_put(i, element);
2019 }
2020
2021 return trace();
2022 }
2023
2024 const char* java_lang_Thread::thread_status_name(oop java_thread) {
2025 JavaThreadStatus status = get_thread_status(java_thread);
2026 switch (status) {
2027 case JavaThreadStatus::NEW : return "NEW";
2028 case JavaThreadStatus::RUNNABLE : return "RUNNABLE";
2029 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)";
2030 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)";
2031 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
2032 case JavaThreadStatus::PARKED : return "WAITING (parking)";
2033 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)";
2034 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
2035 case JavaThreadStatus::TERMINATED : return "TERMINATED";
2036 default : return "UNKNOWN";
2037 };
2038 }
2039 int java_lang_ThreadGroup::_parent_offset;
2040 int java_lang_ThreadGroup::_name_offset;
2041 int java_lang_ThreadGroup::_maxPriority_offset;
2042 int java_lang_ThreadGroup::_daemon_offset;
2043
2044 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
2045 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2046 return java_thread_group->obj_field(_parent_offset);
2047 }
2048
2049 // ("name as oop" accessor is not necessary)
2050
2051 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
2052 oop name = java_thread_group->obj_field(_name_offset);
2053 // ThreadGroup.name can be null
2054 if (name != nullptr) {
2055 return java_lang_String::as_utf8_string(name);
2056 }
2057 return nullptr;
2058 }
2059
2060 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
2061 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2062 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
2063 }
2064
2065 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
2066 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2067 return java_thread_group->bool_field(_daemon_offset) != 0;
2068 }
2069
2070 #define THREADGROUP_FIELDS_DO(macro) \
2071 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
2072 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
2073 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
2074 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false);
2075
2076 void java_lang_ThreadGroup::compute_offsets() {
2077 assert(_parent_offset == 0, "offsets should be initialized only once");
2078
2079 InstanceKlass* k = vmClasses::ThreadGroup_klass();
2080 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2081 }
2082
2083 #if INCLUDE_CDS
2084 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
2085 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2086 }
2087 #endif
2088
2089
2090 // java_lang_VirtualThread
2091
2092 int java_lang_VirtualThread::static_vthread_scope_offset;
2093 int java_lang_VirtualThread::_carrierThread_offset;
2094 int java_lang_VirtualThread::_continuation_offset;
2095 int java_lang_VirtualThread::_state_offset;
2096 int java_lang_VirtualThread::_next_offset;
2097 int java_lang_VirtualThread::_onWaitingList_offset;
2098 int java_lang_VirtualThread::_notified_offset;
2099 int java_lang_VirtualThread::_timeout_offset;
2100 int java_lang_VirtualThread::_objectWaiter_offset;
2101
2102 #define VTHREAD_FIELDS_DO(macro) \
2103 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \
2104 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \
2105 macro(_continuation_offset, k, "cont", continuation_signature, false); \
2106 macro(_state_offset, k, "state", int_signature, false); \
2107 macro(_next_offset, k, "next", vthread_signature, false); \
2108 macro(_onWaitingList_offset, k, "onWaitingList", bool_signature, false); \
2109 macro(_notified_offset, k, "notified", bool_signature, false); \
2110 macro(_timeout_offset, k, "timeout", long_signature, false);
2111
2112
2113 void java_lang_VirtualThread::compute_offsets() {
2114 InstanceKlass* k = vmClasses::VirtualThread_klass();
2115 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2116 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2117 }
2118
2119 bool java_lang_VirtualThread::is_instance(oop obj) {
2120 return obj != nullptr && is_subclass(obj->klass());
2121 }
2122
2123 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
2124 oop thread = vthread->obj_field(_carrierThread_offset);
2125 return thread;
2126 }
2127
2128 oop java_lang_VirtualThread::continuation(oop vthread) {
2129 oop cont = vthread->obj_field(_continuation_offset);
2130 return cont;
2131 }
2132
2133 int java_lang_VirtualThread::state(oop vthread) {
2134 return vthread->int_field_acquire(_state_offset);
2135 }
2136
2137 void java_lang_VirtualThread::set_state(oop vthread, int state) {
2138 vthread->release_int_field_put(_state_offset, state);
2139 }
2140
2141 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) {
2142 jint* addr = vthread->field_addr<jint>(_state_offset);
2143 int res = AtomicAccess::cmpxchg(addr, old_state, new_state);
2144 return res;
2145 }
2146
2147 oop java_lang_VirtualThread::next(oop vthread) {
2148 return vthread->obj_field(_next_offset);
2149 }
2150
2151 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) {
2152 vthread->obj_field_put(_next_offset, next_vthread);
2153 }
2154
2155 // Add vthread to the waiting list if it's not already in it. Multiple threads
2156 // could be trying to add vthread to the list at the same time, so we control
2157 // access with a cmpxchg on onWaitingList. The winner adds vthread to the list.
2158 // Method returns true if we added vthread to the list, false otherwise.
2159 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) {
2160 jboolean* addr = vthread->field_addr<jboolean>(_onWaitingList_offset);
2161 jboolean vthread_on_list = AtomicAccess::load(addr);
2162 if (!vthread_on_list) {
2163 vthread_on_list = AtomicAccess::cmpxchg(addr, (jboolean)JNI_FALSE, (jboolean)JNI_TRUE);
2164 if (!vthread_on_list) {
2165 for (;;) {
2166 oop head = list_head.resolve();
2167 java_lang_VirtualThread::set_next(vthread, head);
2168 if (list_head.cmpxchg(head, vthread) == head) return true;
2169 }
2170 }
2171 }
2172 return false; // already on waiting list
2173 }
2174
2175 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) {
2176 vthread->bool_field_put_volatile(_notified_offset, value);
2177 }
2178
2179 jlong java_lang_VirtualThread::timeout(oop vthread) {
2180 return vthread->long_field(_timeout_offset);
2181 }
2182
2183 void java_lang_VirtualThread::set_timeout(oop vthread, jlong value) {
2184 vthread->long_field_put(_timeout_offset, value);
2185 }
2186
2187 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2188 JavaThreadStatus status = JavaThreadStatus::NEW;
2189 switch (state & ~SUSPENDED) {
2190 case NEW:
2191 status = JavaThreadStatus::NEW;
2192 break;
2193 case STARTED:
2194 case RUNNING:
2195 case PARKING:
2196 case TIMED_PARKING:
2197 case UNPARKED:
2198 case YIELDING:
2199 case YIELDED:
2200 case UNBLOCKED:
2201 case WAITING:
2202 case TIMED_WAITING:
2203 status = JavaThreadStatus::RUNNABLE;
2204 break;
2205 case PARKED:
2206 case PINNED:
2207 status = JavaThreadStatus::PARKED;
2208 break;
2209 case TIMED_PARKED:
2210 case TIMED_PINNED:
2211 status = JavaThreadStatus::PARKED_TIMED;
2212 break;
2213 case BLOCKING:
2214 case BLOCKED:
2215 status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER;
2216 break;
2217 case WAIT:
2218 status = JavaThreadStatus::IN_OBJECT_WAIT;
2219 break;
2220 case TIMED_WAIT:
2221 status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED;
2222 break;
2223 case TERMINATED:
2224 status = JavaThreadStatus::TERMINATED;
2225 break;
2226 default:
2227 ShouldNotReachHere();
2228 }
2229 return status;
2230 }
2231
2232 ObjectMonitor* java_lang_VirtualThread::current_pending_monitor(oop vthread) {
2233 ObjectWaiter* waiter = objectWaiter(vthread);
2234 if (waiter != nullptr && waiter->at_monitorenter()) {
2235 return waiter->monitor();
2236 }
2237 return nullptr;
2238 }
2239
2240 ObjectMonitor* java_lang_VirtualThread::current_waiting_monitor(oop vthread) {
2241 ObjectWaiter* waiter = objectWaiter(vthread);
2242 if (waiter != nullptr && waiter->is_wait()) {
2243 return waiter->monitor();
2244 }
2245 return nullptr;
2246 }
2247
2248 bool java_lang_VirtualThread::is_preempted(oop vthread) {
2249 oop continuation = java_lang_VirtualThread::continuation(vthread);
2250 assert(continuation != nullptr, "vthread with no continuation");
2251 stackChunkOop chunk = jdk_internal_vm_Continuation::tail(continuation);
2252 return chunk != nullptr && chunk->preempted();
2253 }
2254
2255 #if INCLUDE_CDS
2256 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2257 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2258 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2259 }
2260 #endif
2261
2262 // java_lang_Throwable
2263
2264 int java_lang_Throwable::_backtrace_offset;
2265 int java_lang_Throwable::_detailMessage_offset;
2266 int java_lang_Throwable::_stackTrace_offset;
2267 int java_lang_Throwable::_depth_offset;
2268 int java_lang_Throwable::_cause_offset;
2269 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2270
2271 #define THROWABLE_FIELDS_DO(macro) \
2272 macro(_backtrace_offset, k, "backtrace", object_signature, false); \
2273 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \
2274 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2275 macro(_depth_offset, k, "depth", int_signature, false); \
2276 macro(_cause_offset, k, "cause", throwable_signature, false); \
2277 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2278
2279 void java_lang_Throwable::compute_offsets() {
2280 InstanceKlass* k = vmClasses::Throwable_klass();
2281 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2282 }
2283
2284 #if INCLUDE_CDS
2285 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2286 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2287 }
2288 #endif
2289
2290 oop java_lang_Throwable::unassigned_stacktrace() {
2291 InstanceKlass* ik = vmClasses::Throwable_klass();
2292 oop base = ik->static_field_base_raw();
2293 return base->obj_field(_static_unassigned_stacktrace_offset);
2294 }
2295
2296 oop java_lang_Throwable::backtrace(oop throwable) {
2297 return throwable->obj_field_acquire(_backtrace_offset);
2298 }
2299
2300
2301 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2302 throwable->release_obj_field_put(_backtrace_offset, value);
2303 }
2304
2305 int java_lang_Throwable::depth(oop throwable) {
2306 return throwable->int_field(_depth_offset);
2307 }
2308
2309 void java_lang_Throwable::set_depth(oop throwable, int value) {
2310 throwable->int_field_put(_depth_offset, value);
2311 }
2312
2313 oop java_lang_Throwable::message(oop throwable) {
2314 return throwable->obj_field(_detailMessage_offset);
2315 }
2316
2317 const char* java_lang_Throwable::message_as_utf8(oop throwable) {
2318 oop msg = java_lang_Throwable::message(throwable);
2319 const char* msg_utf8 = nullptr;
2320 if (msg != nullptr) {
2321 msg_utf8 = java_lang_String::as_utf8_string(msg);
2322 }
2323 return msg_utf8;
2324 }
2325
2326 oop java_lang_Throwable::cause(oop throwable) {
2327 return throwable->obj_field(_cause_offset);
2328 }
2329
2330 void java_lang_Throwable::set_message(oop throwable, oop value) {
2331 throwable->obj_field_put(_detailMessage_offset, value);
2332 }
2333
2334
2335 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2336 throwable->obj_field_put(_stackTrace_offset, st_element_array);
2337 }
2338
2339 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2340 set_stacktrace(throwable, nullptr);
2341 }
2342
2343
2344 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2345 ResourceMark rm;
2346 Klass* k = throwable->klass();
2347 assert(k != nullptr, "just checking");
2348 st->print("%s", k->external_name());
2349 oop msg = message(throwable);
2350 if (msg != nullptr) {
2351 st->print(": %s", java_lang_String::as_utf8_string(msg));
2352 }
2353 }
2354
2355 // After this many redefines, the stack trace is unreliable.
2356 const int MAX_VERSION = USHRT_MAX;
2357
2358 static inline bool version_matches(Method* method, int version) {
2359 assert(version < MAX_VERSION, "version is too big");
2360 return method != nullptr && (method->constants()->version() == version);
2361 }
2362
2363 // This class provides a simple wrapper over the internal structure of
2364 // exception backtrace to insulate users of the backtrace from needing
2365 // to know what it looks like.
2366 // The code of this class is not GC safe. Allocations can only happen
2367 // in expand().
2368 class BacktraceBuilder: public StackObj {
2369 friend class BacktraceIterator;
2370 private:
2371 Handle _backtrace;
2372 objArrayOop _head;
2373 typeArrayOop _methods;
2374 typeArrayOop _bcis;
2375 objArrayOop _mirrors;
2376 typeArrayOop _names; // Needed to insulate method name against redefinition.
2377 // True if the top frame of the backtrace is omitted because it shall be hidden.
2378 bool _has_hidden_top_frame;
2379 int _index;
2380 NoSafepointVerifier _nsv;
2381
2382 enum {
2383 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2384 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2385 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2386 trace_names_offset = java_lang_Throwable::trace_names_offset,
2387 trace_conts_offset = java_lang_Throwable::trace_conts_offset,
2388 trace_next_offset = java_lang_Throwable::trace_next_offset,
2389 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2390 trace_size = java_lang_Throwable::trace_size,
2391 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2392 };
2393
2394 // get info out of chunks
2395 static typeArrayOop get_methods(objArrayHandle chunk) {
2396 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2397 assert(methods != nullptr, "method array should be initialized in backtrace");
2398 return methods;
2399 }
2400 static typeArrayOop get_bcis(objArrayHandle chunk) {
2401 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2402 assert(bcis != nullptr, "bci array should be initialized in backtrace");
2403 return bcis;
2404 }
2405 static objArrayOop get_mirrors(objArrayHandle chunk) {
2406 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2407 assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2408 return mirrors;
2409 }
2410 static typeArrayOop get_names(objArrayHandle chunk) {
2411 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2412 assert(names != nullptr, "names array should be initialized in backtrace");
2413 return names;
2414 }
2415 static bool has_hidden_top_frame(objArrayHandle chunk) {
2416 oop hidden = chunk->obj_at(trace_hidden_offset);
2417 return hidden != nullptr;
2418 }
2419
2420 public:
2421
2422 // constructor for new backtrace
2423 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2424 expand(CHECK);
2425 _backtrace = Handle(THREAD, _head);
2426 _index = 0;
2427 }
2428
2429 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2430 _methods = get_methods(backtrace);
2431 _bcis = get_bcis(backtrace);
2432 _mirrors = get_mirrors(backtrace);
2433 _names = get_names(backtrace);
2434 _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2435 assert(_methods->length() == _bcis->length() &&
2436 _methods->length() == _mirrors->length() &&
2437 _mirrors->length() == _names->length(),
2438 "method and source information arrays should match");
2439
2440 // head is the preallocated backtrace
2441 _head = backtrace();
2442 _backtrace = Handle(thread, _head);
2443 _index = 0;
2444 }
2445
2446 void expand(TRAPS) {
2447 objArrayHandle old_head(THREAD, _head);
2448 PauseNoSafepointVerifier pnsv(&_nsv);
2449
2450 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2451 objArrayHandle new_head(THREAD, head);
2452
2453 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2454 typeArrayHandle new_methods(THREAD, methods);
2455
2456 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2457 typeArrayHandle new_bcis(THREAD, bcis);
2458
2459 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2460 objArrayHandle new_mirrors(THREAD, mirrors);
2461
2462 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2463 typeArrayHandle new_names(THREAD, names);
2464
2465 if (!old_head.is_null()) {
2466 old_head->obj_at_put(trace_next_offset, new_head());
2467 }
2468 new_head->obj_at_put(trace_methods_offset, new_methods());
2469 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2470 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2471 new_head->obj_at_put(trace_names_offset, new_names());
2472 new_head->obj_at_put(trace_hidden_offset, nullptr);
2473
2474 _head = new_head();
2475 _methods = new_methods();
2476 _bcis = new_bcis();
2477 _mirrors = new_mirrors();
2478 _names = new_names();
2479 _index = 0;
2480 }
2481
2482 oop backtrace() {
2483 return _backtrace();
2484 }
2485
2486 inline void push(Method* method, int bci, TRAPS) {
2487 // Smear the -1 bci to 0 since the array only holds unsigned
2488 // shorts. The later line number lookup would just smear the -1
2489 // to a 0 even if it could be recorded.
2490 if (bci == SynchronizationEntryBCI) bci = 0;
2491
2492 if (_index >= trace_chunk_size) {
2493 methodHandle mhandle(THREAD, method);
2494 expand(CHECK);
2495 method = mhandle();
2496 }
2497
2498 _methods->ushort_at_put(_index, method->orig_method_idnum());
2499 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2500
2501 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2502 // klass owning the symbols alive so their refcounts aren't decremented.
2503 Symbol* name = method->name();
2504 _names->symbol_at_put(_index, name);
2505
2506 // We need to save the mirrors in the backtrace to keep the class
2507 // from being unloaded while we still have this stack trace.
2508 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2509 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2510
2511 _index++;
2512 }
2513
2514 void set_has_hidden_top_frame() {
2515 if (!_has_hidden_top_frame) {
2516 // It would be nice to add java/lang/Boolean::TRUE here
2517 // to indicate that this backtrace has a hidden top frame.
2518 // But this code is used before TRUE is allocated.
2519 // Therefore let's just use an arbitrary legal oop
2520 // available right here. _methods is a short[].
2521 assert(_methods != nullptr, "we need a legal oop");
2522 _has_hidden_top_frame = true;
2523 _head->obj_at_put(trace_hidden_offset, _methods);
2524 }
2525 }
2526 };
2527
2528 struct BacktraceElement : public StackObj {
2529 int _method_id;
2530 int _bci;
2531 int _version;
2532 Symbol* _name;
2533 Handle _mirror;
2534 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2535 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2536 };
2537
2538 class BacktraceIterator : public StackObj {
2539 int _index;
2540 objArrayHandle _result;
2541 objArrayHandle _mirrors;
2542 typeArrayHandle _methods;
2543 typeArrayHandle _bcis;
2544 typeArrayHandle _names;
2545
2546 void init(objArrayHandle result, Thread* thread) {
2547 // Get method id, bci, version and mirror from chunk
2548 _result = result;
2549 if (_result.not_null()) {
2550 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2551 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2552 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2553 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2554 _index = 0;
2555 }
2556 }
2557 public:
2558 BacktraceIterator(objArrayHandle result, Thread* thread) {
2559 init(result, thread);
2560 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2561 }
2562
2563 BacktraceElement next(Thread* thread) {
2564 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2565 _methods->ushort_at(_index),
2566 Backtrace::version_at(_bcis->int_at(_index)),
2567 Backtrace::bci_at(_bcis->int_at(_index)),
2568 _names->symbol_at(_index));
2569 _index++;
2570
2571 if (_index >= java_lang_Throwable::trace_chunk_size) {
2572 int next_offset = java_lang_Throwable::trace_next_offset;
2573 // Get next chunk
2574 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2575 init(result, thread);
2576 }
2577 return e;
2578 }
2579
2580 bool repeat() {
2581 return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2582 }
2583 };
2584
2585
2586 // Print stack trace element to the specified output stream.
2587 // The output is formatted into a stringStream and written to the outputStream in one step.
2588 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2589 int version, int bci, Symbol* name) {
2590 ResourceMark rm;
2591 stringStream ss;
2592
2593 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2594 const char* klass_name = holder->external_name();
2595 char* method_name = name->as_C_string();
2596 ss.print("\tat %s.%s(", klass_name, method_name);
2597
2598 // Print module information
2599 ModuleEntry* module = holder->module();
2600 if (module->is_named()) {
2601 char* module_name = module->name()->as_C_string();
2602 if (module->version() != nullptr) {
2603 char* module_version = module->version()->as_C_string();
2604 ss.print("%s@%s/", module_name, module_version);
2605 } else {
2606 ss.print("%s/", module_name);
2607 }
2608 }
2609
2610 char* source_file_name = nullptr;
2611 Symbol* source = Backtrace::get_source_file_name(holder, version);
2612 if (source != nullptr) {
2613 source_file_name = source->as_C_string();
2614 }
2615
2616 // The method can be null if the requested class version is gone
2617 Method* method = holder->method_with_orig_idnum(method_id, version);
2618 if (!version_matches(method, version)) {
2619 ss.print("Redefined)");
2620 } else {
2621 int line_number = Backtrace::get_line_number(method, bci);
2622 if (line_number == -2) {
2623 ss.print("Native Method)");
2624 } else {
2625 if (source_file_name != nullptr && (line_number != -1)) {
2626 // Sourcename and linenumber
2627 ss.print("%s:%d)", source_file_name, line_number);
2628 } else if (source_file_name != nullptr) {
2629 // Just sourcename
2630 ss.print("%s)", source_file_name);
2631 } else {
2632 // Neither sourcename nor linenumber
2633 ss.print("Unknown Source)");
2634 }
2635 nmethod* nm = method->code();
2636 if (WizardMode && nm != nullptr) {
2637 ss.print("(nmethod " INTPTR_FORMAT ")", p2i(nm));
2638 }
2639 }
2640 }
2641
2642 ss.cr();
2643 st->print_raw(ss.freeze(), ss.size());
2644 }
2645
2646 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2647 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2648 int method_id = method->orig_method_idnum();
2649 int version = method->constants()->version();
2650 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2651 }
2652
2653 /**
2654 * Print the throwable message and its stack trace plus all causes by walking the
2655 * cause chain. The output looks the same as of Throwable.printStackTrace().
2656 */
2657 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2658 // First, print the message.
2659 print(throwable(), st);
2660 st->cr();
2661
2662 // Now print the stack trace.
2663 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2664 while (throwable.not_null()) {
2665 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2666 if (result.is_null()) {
2667 st->print_raw_cr("\t<<no stack trace available>>");
2668 return;
2669 }
2670 BacktraceIterator iter(result, THREAD);
2671
2672 while (iter.repeat()) {
2673 BacktraceElement bte = iter.next(THREAD);
2674 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2675 }
2676 if (THREAD->can_call_java()) {
2677 // Call getCause() which doesn't necessarily return the _cause field.
2678 ExceptionMark em(THREAD);
2679 JavaValue cause(T_OBJECT);
2680 JavaCalls::call_virtual(&cause,
2681 throwable,
2682 throwable->klass(),
2683 vmSymbols::getCause_name(),
2684 vmSymbols::void_throwable_signature(),
2685 THREAD);
2686 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2687 if (HAS_PENDING_EXCEPTION) {
2688 CLEAR_PENDING_EXCEPTION;
2689 throwable = Handle();
2690 } else {
2691 throwable = Handle(THREAD, cause.get_oop());
2692 if (throwable.not_null()) {
2693 st->print("Caused by: ");
2694 print(throwable(), st);
2695 st->cr();
2696 }
2697 }
2698 } else {
2699 st->print_raw_cr("<<cannot call Java to get cause>>");
2700 return;
2701 }
2702 }
2703 }
2704
2705 /**
2706 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2707 */
2708 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2709 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2710 JavaValue result(T_VOID);
2711 JavaCalls::call_virtual(&result,
2712 throwable,
2713 vmClasses::Throwable_klass(),
2714 vmSymbols::printStackTrace_name(),
2715 vmSymbols::void_method_signature(),
2716 THREAD);
2717 }
2718
2719 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2720 if (!StackTraceInThrowable) return;
2721 ResourceMark rm(THREAD);
2722
2723 // Start out by clearing the backtrace for this object, in case the VM
2724 // runs out of memory while allocating the stack trace
2725 set_backtrace(throwable(), nullptr);
2726 // Clear lazily constructed Java level stacktrace if refilling occurs
2727 // This is unnecessary in 1.7+ but harmless
2728 clear_stacktrace(throwable());
2729
2730 int max_depth = MaxJavaStackTraceDepth;
2731 JavaThread* thread = THREAD;
2732
2733 BacktraceBuilder bt(CHECK);
2734
2735 // If there is no Java frame just return the method that was being called
2736 // with bci 0
2737 if (!thread->has_last_Java_frame()) {
2738 if (max_depth >= 1 && method() != nullptr) {
2739 bt.push(method(), 0, CHECK);
2740 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2741 set_depth(throwable(), 1);
2742 set_backtrace(throwable(), bt.backtrace());
2743 }
2744 return;
2745 }
2746
2747 // Instead of using vframe directly, this version of fill_in_stack_trace
2748 // basically handles everything by hand. This significantly improved the
2749 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2750 // See bug 6333838 for more details.
2751 // The "ASSERT" here is to verify this method generates the exactly same stack
2752 // trace as utilizing vframe.
2753 #ifdef ASSERT
2754 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2755 #endif
2756 int total_count = 0;
2757 RegisterMap map(thread,
2758 RegisterMap::UpdateMap::skip,
2759 RegisterMap::ProcessFrames::skip,
2760 RegisterMap::WalkContinuation::include);
2761 int decode_offset = 0;
2762 nmethod* nm = nullptr;
2763 bool skip_fillInStackTrace_check = false;
2764 bool skip_throwableInit_check = false;
2765 bool skip_hidden = !ShowHiddenFrames;
2766 bool show_carrier = ShowCarrierFrames;
2767 ContinuationEntry* cont_entry = thread->last_continuation();
2768 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2769 Method* method = nullptr;
2770 int bci = 0;
2771
2772 // Compiled java method case.
2773 if (decode_offset != 0) {
2774 DebugInfoReadStream stream(nm, decode_offset);
2775 decode_offset = stream.read_int();
2776 method = (Method*)nm->metadata_at(stream.read_int());
2777 bci = stream.read_bci();
2778 } else {
2779 if (fr.is_first_frame()) break;
2780
2781 if (Continuation::is_continuation_enterSpecial(fr)) {
2782 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2783 if (!show_carrier && cont_entry->is_virtual_thread()) {
2784 break;
2785 }
2786 cont_entry = cont_entry->parent();
2787 }
2788
2789 address pc = fr.pc();
2790 if (fr.is_interpreted_frame()) {
2791 address bcp;
2792 if (!map.in_cont()) {
2793 bcp = fr.interpreter_frame_bcp();
2794 method = fr.interpreter_frame_method();
2795 } else {
2796 bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2797 method = map.stack_chunk()->interpreter_frame_method(fr);
2798 }
2799 bci = method->bci_from(bcp);
2800 fr = fr.sender(&map);
2801 } else {
2802 CodeBlob* cb = fr.cb();
2803 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2804 // but non nmethod
2805 fr = fr.sender(&map);
2806 if (cb == nullptr || !cb->is_nmethod()) {
2807 continue;
2808 }
2809 nm = cb->as_nmethod();
2810 assert(nm->method() != nullptr, "must be");
2811 if (nm->method()->is_native()) {
2812 method = nm->method();
2813 bci = 0;
2814 } else {
2815 PcDesc* pd = nm->pc_desc_at(pc);
2816 decode_offset = pd->scope_decode_offset();
2817 // if decode_offset is not equal to 0, it will execute the
2818 // "compiled java method case" at the beginning of the loop.
2819 continue;
2820 }
2821 }
2822 }
2823 #ifdef ASSERT
2824 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2825 assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2826 st.next();
2827 }
2828 #endif
2829
2830 // the format of the stacktrace will be:
2831 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2832 // - 0 or more <init> methods for the exception class (skipped)
2833 // - rest of the stack
2834
2835 if (!skip_fillInStackTrace_check) {
2836 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2837 throwable->is_a(method->method_holder())) {
2838 continue;
2839 }
2840 else {
2841 skip_fillInStackTrace_check = true; // gone past them all
2842 }
2843 }
2844 if (!skip_throwableInit_check) {
2845 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2846
2847 // skip <init> methods of the exception class and superclasses
2848 // This is similar to classic VM.
2849 if (method->name() == vmSymbols::object_initializer_name() &&
2850 throwable->is_a(method->method_holder())) {
2851 continue;
2852 } else {
2853 // there are none or we've seen them all - either way stop checking
2854 skip_throwableInit_check = true;
2855 }
2856 }
2857 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2858 if (skip_hidden) {
2859 if (total_count == 0) {
2860 // The top frame will be hidden from the stack trace.
2861 bt.set_has_hidden_top_frame();
2862 }
2863 continue;
2864 }
2865 }
2866
2867 bt.push(method, bci, CHECK);
2868 total_count++;
2869 }
2870
2871 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2872
2873 // Put completed stack trace into throwable object
2874 set_backtrace(throwable(), bt.backtrace());
2875 set_depth(throwable(), total_count);
2876 }
2877
2878 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2879 // No-op if stack trace is disabled
2880 if (!StackTraceInThrowable) {
2881 return;
2882 }
2883
2884 // Disable stack traces for some preallocated out of memory errors
2885 if (!Universe::should_fill_in_stack_trace(throwable)) {
2886 return;
2887 }
2888
2889 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2890 PreserveExceptionMark pm(THREAD);
2891
2892 fill_in_stack_trace(throwable, method, THREAD);
2893 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2894 // original exception via the PreserveExceptionMark destructor.
2895 CLEAR_PENDING_EXCEPTION;
2896 }
2897
2898 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2899 // Allocate stack trace - backtrace is created but not filled in
2900
2901 // No-op if stack trace is disabled
2902 if (!StackTraceInThrowable) return;
2903 BacktraceBuilder bt(CHECK); // creates a backtrace
2904 set_backtrace(throwable(), bt.backtrace());
2905 }
2906
2907
2908 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2909 // Fill in stack trace into preallocated backtrace (no GC)
2910
2911 // No-op if stack trace is disabled
2912 if (!StackTraceInThrowable) return;
2913
2914 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2915
2916 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2917
2918 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2919 assert(backtrace.not_null(), "backtrace should have been preallocated");
2920
2921 ResourceMark rm(THREAD);
2922 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2923
2924 BacktraceBuilder bt(THREAD, backtrace);
2925
2926 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2927 // methods as preallocated errors aren't created by "java" code.
2928
2929 // fill in as much stack trace as possible
2930 int chunk_count = 0;
2931 for (;!st.at_end(); st.next()) {
2932 bt.push(st.method(), st.bci(), CHECK);
2933 chunk_count++;
2934
2935 // Bail-out for deep stacks
2936 if (chunk_count >= trace_chunk_size) break;
2937 }
2938 set_depth(throwable(), chunk_count);
2939 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2940
2941 // We support the Throwable immutability protocol defined for Java 7.
2942 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2943 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2944 }
2945
2946 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2947 objArrayHandle stack_trace_array_h, TRAPS) {
2948
2949 if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2950 THROW(vmSymbols::java_lang_NullPointerException());
2951 }
2952
2953 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2954
2955 if (stack_trace_array_h->length() != depth) {
2956 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2957 }
2958
2959 objArrayHandle result(THREAD, objArrayOop(backtrace()));
2960 BacktraceIterator iter(result, THREAD);
2961
2962 int index = 0;
2963 while (iter.repeat()) {
2964 BacktraceElement bte = iter.next(THREAD);
2965
2966 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2967
2968 if (stack_trace_element.is_null()) {
2969 THROW(vmSymbols::java_lang_NullPointerException());
2970 }
2971
2972 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2973 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2974
2975 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2976 method,
2977 bte._version,
2978 bte._bci,
2979 bte._name,
2980 CHECK);
2981 }
2982 }
2983
2984 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
2985 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
2986 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
2987 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
2988 // symbolic stacktrace of 'throwable'.
2989 assert(throwable.not_null(), "shouldn't be");
2990
2991 // Now create the message from the original exception and thread name.
2992 ResourceMark rm(current);
2993 const char *message = nullptr;
2994 oop detailed_message = java_lang_Throwable::message(throwable());
2995 if (detailed_message != nullptr) {
2996 message = java_lang_String::as_utf8_string(detailed_message);
2997 }
2998 stringStream st;
2999 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
3000 message == nullptr ? "" : ":");
3001 if (message == nullptr) {
3002 st.print("[in thread \"%s\"]", current->name());
3003 } else {
3004 st.print("%s [in thread \"%s\"]", message, current->name());
3005 }
3006
3007 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
3008 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
3009 // If new_exception returns a different exception while creating the exception,
3010 // abandon the attempt to save the initialization error and return null.
3011 if (init_error->klass()->name() != exception_name) {
3012 log_info(class, init)("Exception %s thrown while saving initialization exception",
3013 init_error->klass()->external_name());
3014 return Handle();
3015 }
3016
3017 // Call to java to fill in the stack trace and clear declaringClassObject to
3018 // not keep classes alive in the stack trace.
3019 // call this: public StackTraceElement[] getStackTrace()
3020 JavaValue result(T_ARRAY);
3021 JavaCalls::call_virtual(&result, throwable,
3022 vmClasses::Throwable_klass(),
3023 vmSymbols::getStackTrace_name(),
3024 vmSymbols::getStackTrace_signature(),
3025 current);
3026 if (!current->has_pending_exception()){
3027 Handle stack_trace(current, result.get_oop());
3028 assert(stack_trace->is_objArray(), "Should be an array");
3029 java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
3030 // Clear backtrace because the stacktrace should be used instead.
3031 set_backtrace(init_error(), nullptr);
3032 } else {
3033 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
3034 init_error->klass()->external_name());
3035 current->clear_pending_exception();
3036 }
3037
3038 return init_error;
3039 }
3040
3041 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
3042 JavaThread* current = JavaThread::current();
3043 objArrayHandle result(current, objArrayOop(backtrace(throwable)));
3044 BacktraceIterator iter(result, current);
3045 // No backtrace available.
3046 if (!iter.repeat()) return false;
3047
3048 // If the exception happened in a frame that has been hidden, i.e.,
3049 // omitted from the back trace, we can not compute the message.
3050 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
3051 if (hidden != nullptr) {
3052 return false;
3053 }
3054
3055 // Get first backtrace element.
3056 BacktraceElement bte = iter.next(current);
3057
3058 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
3059 assert(holder != nullptr, "first element should be non-null");
3060 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
3061
3062 // Original version is no longer available.
3063 if (m == nullptr || !version_matches(m, bte._version)) {
3064 return false;
3065 }
3066
3067 *method = m;
3068 *bci = bte._bci;
3069 return true;
3070 }
3071
3072 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
3073 // Allocate java.lang.StackTraceElement instance
3074 InstanceKlass* k = vmClasses::StackTraceElement_klass();
3075 assert(k != nullptr, "must be loaded in 1.4+");
3076 if (k->should_be_initialized()) {
3077 k->initialize(CHECK_NULL);
3078 }
3079
3080 Handle element = k->allocate_instance_handle(CHECK_NULL);
3081
3082 int version = method->constants()->version();
3083 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
3084 return element();
3085 }
3086
3087 void java_lang_StackTraceElement::fill_in(Handle element,
3088 InstanceKlass* holder, const methodHandle& method,
3089 int version, int bci, Symbol* name, TRAPS) {
3090 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
3091
3092 ResourceMark rm(THREAD);
3093 HandleMark hm(THREAD);
3094
3095 // Fill in class name
3096 Handle java_class(THREAD, holder->java_mirror());
3097 oop classname = java_lang_Class::name(java_class, CHECK);
3098 java_lang_StackTraceElement::set_declaringClass(element(), classname);
3099 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
3100
3101 oop loader = holder->class_loader();
3102 if (loader != nullptr) {
3103 oop loader_name = java_lang_ClassLoader::name(loader);
3104 if (loader_name != nullptr)
3105 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
3106 }
3107
3108 // Fill in method name
3109 oop methodname = StringTable::intern(name, CHECK);
3110 java_lang_StackTraceElement::set_methodName(element(), methodname);
3111
3112 // Fill in module name and version
3113 ModuleEntry* module = holder->module();
3114 if (module->is_named()) {
3115 oop module_name = StringTable::intern(module->name(), CHECK);
3116 java_lang_StackTraceElement::set_moduleName(element(), module_name);
3117 oop module_version;
3118 if (module->version() != nullptr) {
3119 module_version = StringTable::intern(module->version(), CHECK);
3120 } else {
3121 module_version = nullptr;
3122 }
3123 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
3124 }
3125
3126 if (method() == nullptr || !version_matches(method(), version)) {
3127 // The method was redefined, accurate line number information isn't available
3128 java_lang_StackTraceElement::set_fileName(element(), nullptr);
3129 java_lang_StackTraceElement::set_lineNumber(element(), -1);
3130 } else {
3131 Symbol* source;
3132 oop source_file;
3133 int line_number;
3134 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
3135
3136 java_lang_StackTraceElement::set_fileName(element(), source_file);
3137 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
3138 }
3139 }
3140
3141 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
3142 InstanceKlass* holder,
3143 int version,
3144 const methodHandle& method,
3145 int bci,
3146 Symbol*& source,
3147 oop& source_file,
3148 int& line_number, TRAPS) {
3149 // Fill in source file name and line number.
3150 source = Backtrace::get_source_file_name(holder, version);
3151 source_file = java_lang_Class::source_file(java_class());
3152 if (source != nullptr) {
3153 // Class was not redefined. We can trust its cache if set,
3154 // else we have to initialize it.
3155 if (source_file == nullptr) {
3156 source_file = StringTable::intern(source, CHECK);
3157 java_lang_Class::set_source_file(java_class(), source_file);
3158 }
3159 } else {
3160 // Class was redefined. Dump the cache if it was set.
3161 if (source_file != nullptr) {
3162 source_file = nullptr;
3163 java_lang_Class::set_source_file(java_class(), source_file);
3164 }
3165 }
3166 line_number = Backtrace::get_line_number(method(), bci);
3167 }
3168
3169 #if INCLUDE_JVMCI
3170 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
3171 Symbol*& filename, int& line_number, TRAPS) {
3172 ResourceMark rm(THREAD);
3173 HandleMark hm(THREAD);
3174
3175 filename = nullptr;
3176 line_number = -1;
3177
3178 oop source_file;
3179 int version = method->constants()->version();
3180 InstanceKlass* holder = method->method_holder();
3181 Handle java_class(THREAD, holder->java_mirror());
3182 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
3183 }
3184 #endif // INCLUDE_JVMCI
3185
3186 // java_lang_ClassFrameInfo
3187
3188 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
3189 int java_lang_ClassFrameInfo::_flags_offset;
3190
3191 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
3192 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \
3193 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false)
3194
3195 void java_lang_ClassFrameInfo::compute_offsets() {
3196 InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
3197 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3198 }
3199
3200 #if INCLUDE_CDS
3201 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
3202 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3203 }
3204 #endif
3205
3206 static int get_flags(const methodHandle& m) {
3207 int flags = m->access_flags().as_method_flags();
3208 if (m->is_object_initializer()) {
3209 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR;
3210 } else {
3211 // Note: Static initializers can be here. Record them as plain methods.
3212 flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
3213 }
3214 if (m->caller_sensitive()) {
3215 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
3216 }
3217 if (m->is_hidden()) {
3218 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3219 }
3220 assert((flags & 0xFF000000) == 0, "unexpected flags");
3221 return flags;
3222 }
3223
3224 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3225 return obj->obj_field(_classOrMemberName_offset);
3226 }
3227
3228 int java_lang_ClassFrameInfo::flags(oop obj) {
3229 return obj->int_field(_flags_offset);
3230 }
3231
3232 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3233 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3234 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3235 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3236 stackFrame->int_field_put(_flags_offset, flags);
3237 }
3238
3239 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3240 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3241 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3242 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3243 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3244 stackFrame->int_field_put(_flags_offset, flags);
3245 }
3246
3247
3248 // java_lang_StackFrameInfo
3249
3250 int java_lang_StackFrameInfo::_type_offset;
3251 int java_lang_StackFrameInfo::_name_offset;
3252 int java_lang_StackFrameInfo::_bci_offset;
3253 int java_lang_StackFrameInfo::_version_offset;
3254 int java_lang_StackFrameInfo::_contScope_offset;
3255
3256 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3257 macro(_type_offset, k, "type", object_signature, false); \
3258 macro(_name_offset, k, "name", string_signature, false); \
3259 macro(_bci_offset, k, "bci", int_signature, false); \
3260 macro(_contScope_offset, k, "contScope", continuationscope_signature, false)
3261
3262 void java_lang_StackFrameInfo::compute_offsets() {
3263 InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3264 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3265 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3266 }
3267
3268 #if INCLUDE_CDS
3269 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3270 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3271 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3272 }
3273 #endif
3274
3275 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3276 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3277 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3278 return method;
3279 }
3280
3281 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3282 // set Method* or mid/cpref
3283 HandleMark hm(THREAD);
3284 Handle cont_h(THREAD, cont);
3285 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3286
3287 // set bci
3288 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3289 // method may be redefined; store the version
3290 int version = method->constants()->version();
3291 assert((jushort)version == version, "version should be short");
3292 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3293
3294 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3295 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3296 }
3297
3298 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3299 ResourceMark rm(THREAD);
3300 HandleMark hm(THREAD);
3301
3302 Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3303 InstanceKlass* holder = method->method_holder();
3304 short version = stackFrame->short_field(_version_offset);
3305 int bci = stackFrame->int_field(_bci_offset);
3306 Symbol* name = method->name();
3307 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3308 }
3309
3310 oop java_lang_StackFrameInfo::type(oop obj) {
3311 return obj->obj_field(_type_offset);
3312 }
3313
3314 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3315 obj->obj_field_put(_type_offset, value);
3316 }
3317
3318 oop java_lang_StackFrameInfo::name(oop obj) {
3319 return obj->obj_field(_name_offset);
3320 }
3321
3322 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3323 obj->obj_field_put(_name_offset, value);
3324 }
3325
3326 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3327 obj->short_field_put(_version_offset, value);
3328 }
3329
3330 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3331 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3332 obj->int_field_put(_bci_offset, value);
3333 }
3334
3335 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3336 obj->obj_field_put(_contScope_offset, value);
3337 }
3338
3339 int java_lang_LiveStackFrameInfo::_monitors_offset;
3340 int java_lang_LiveStackFrameInfo::_locals_offset;
3341 int java_lang_LiveStackFrameInfo::_operands_offset;
3342 int java_lang_LiveStackFrameInfo::_mode_offset;
3343
3344 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3345 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
3346 macro(_locals_offset, k, "locals", object_array_signature, false); \
3347 macro(_operands_offset, k, "operands", object_array_signature, false); \
3348 macro(_mode_offset, k, "mode", int_signature, false)
3349
3350 void java_lang_LiveStackFrameInfo::compute_offsets() {
3351 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3352 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3353 }
3354
3355 #if INCLUDE_CDS
3356 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3357 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3358 }
3359 #endif
3360
3361 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3362 obj->obj_field_put(_monitors_offset, value);
3363 }
3364
3365 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3366 obj->obj_field_put(_locals_offset, value);
3367 }
3368
3369 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3370 obj->obj_field_put(_operands_offset, value);
3371 }
3372
3373 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3374 obj->int_field_put(_mode_offset, value);
3375 }
3376
3377
3378 // java_lang_AccessibleObject
3379
3380 int java_lang_reflect_AccessibleObject::_override_offset;
3381
3382 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3383 macro(_override_offset, k, "override", bool_signature, false)
3384
3385 void java_lang_reflect_AccessibleObject::compute_offsets() {
3386 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3387 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3388 }
3389
3390 #if INCLUDE_CDS
3391 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3392 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3393 }
3394 #endif
3395
3396 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3397 return (jboolean) reflect->bool_field(_override_offset);
3398 }
3399
3400 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3401 reflect->bool_field_put(_override_offset, (int) value);
3402 }
3403
3404 // java_lang_reflect_Method
3405
3406 int java_lang_reflect_Method::_clazz_offset;
3407 int java_lang_reflect_Method::_name_offset;
3408 int java_lang_reflect_Method::_returnType_offset;
3409 int java_lang_reflect_Method::_parameterTypes_offset;
3410 int java_lang_reflect_Method::_exceptionTypes_offset;
3411 int java_lang_reflect_Method::_slot_offset;
3412 int java_lang_reflect_Method::_modifiers_offset;
3413 int java_lang_reflect_Method::_signature_offset;
3414 int java_lang_reflect_Method::_annotations_offset;
3415 int java_lang_reflect_Method::_parameter_annotations_offset;
3416 int java_lang_reflect_Method::_annotation_default_offset;
3417
3418 #define METHOD_FIELDS_DO(macro) \
3419 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3420 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3421 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
3422 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3423 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3424 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3425 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3426 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3427 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3428 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3429 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
3430
3431 void java_lang_reflect_Method::compute_offsets() {
3432 InstanceKlass* k = vmClasses::reflect_Method_klass();
3433 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3434 }
3435
3436 #if INCLUDE_CDS
3437 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3438 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3439 }
3440 #endif
3441
3442 Handle java_lang_reflect_Method::create(TRAPS) {
3443 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3444 Klass* klass = vmClasses::reflect_Method_klass();
3445 // This class is eagerly initialized during VM initialization, since we keep a reference
3446 // to one of the methods
3447 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
3448 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
3449 }
3450
3451 oop java_lang_reflect_Method::clazz(oop reflect) {
3452 return reflect->obj_field(_clazz_offset);
3453 }
3454
3455 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3456 reflect->obj_field_put(_clazz_offset, value);
3457 }
3458
3459 int java_lang_reflect_Method::slot(oop reflect) {
3460 return reflect->int_field(_slot_offset);
3461 }
3462
3463 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3464 reflect->int_field_put(_slot_offset, value);
3465 }
3466
3467 void java_lang_reflect_Method::set_name(oop method, oop value) {
3468 method->obj_field_put(_name_offset, value);
3469 }
3470
3471 oop java_lang_reflect_Method::return_type(oop method) {
3472 return method->obj_field(_returnType_offset);
3473 }
3474
3475 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3476 method->obj_field_put(_returnType_offset, value);
3477 }
3478
3479 oop java_lang_reflect_Method::parameter_types(oop method) {
3480 return method->obj_field(_parameterTypes_offset);
3481 }
3482
3483 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3484 method->obj_field_put(_parameterTypes_offset, value);
3485 }
3486
3487 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3488 method->obj_field_put(_exceptionTypes_offset, value);
3489 }
3490
3491 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3492 method->int_field_put(_modifiers_offset, value);
3493 }
3494
3495 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3496 method->obj_field_put(_signature_offset, value);
3497 }
3498
3499 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3500 method->obj_field_put(_annotations_offset, value);
3501 }
3502
3503 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3504 method->obj_field_put(_parameter_annotations_offset, value);
3505 }
3506
3507 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3508 method->obj_field_put(_annotation_default_offset, value);
3509 }
3510
3511 int java_lang_reflect_Constructor::_clazz_offset;
3512 int java_lang_reflect_Constructor::_parameterTypes_offset;
3513 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3514 int java_lang_reflect_Constructor::_slot_offset;
3515 int java_lang_reflect_Constructor::_modifiers_offset;
3516 int java_lang_reflect_Constructor::_signature_offset;
3517 int java_lang_reflect_Constructor::_annotations_offset;
3518 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3519
3520 #define CONSTRUCTOR_FIELDS_DO(macro) \
3521 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3522 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3523 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3524 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3525 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3526 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3527 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3528 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3529
3530 void java_lang_reflect_Constructor::compute_offsets() {
3531 InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3532 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3533 }
3534
3535 #if INCLUDE_CDS
3536 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3537 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3538 }
3539 #endif
3540
3541 Handle java_lang_reflect_Constructor::create(TRAPS) {
3542 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3543 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3544 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3545 InstanceKlass* ik = InstanceKlass::cast(k);
3546 // Ensure it is initialized
3547 ik->initialize(CHECK_NH);
3548 return ik->allocate_instance_handle(THREAD);
3549 }
3550
3551 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3552 return reflect->obj_field(_clazz_offset);
3553 }
3554
3555 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3556 reflect->obj_field_put(_clazz_offset, value);
3557 }
3558
3559 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3560 return constructor->obj_field(_parameterTypes_offset);
3561 }
3562
3563 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3564 constructor->obj_field_put(_parameterTypes_offset, value);
3565 }
3566
3567 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3568 constructor->obj_field_put(_exceptionTypes_offset, value);
3569 }
3570
3571 int java_lang_reflect_Constructor::slot(oop reflect) {
3572 return reflect->int_field(_slot_offset);
3573 }
3574
3575 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3576 reflect->int_field_put(_slot_offset, value);
3577 }
3578
3579 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3580 constructor->int_field_put(_modifiers_offset, value);
3581 }
3582
3583 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3584 constructor->obj_field_put(_signature_offset, value);
3585 }
3586
3587 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3588 constructor->obj_field_put(_annotations_offset, value);
3589 }
3590
3591 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3592 method->obj_field_put(_parameter_annotations_offset, value);
3593 }
3594
3595 int java_lang_reflect_Field::_clazz_offset;
3596 int java_lang_reflect_Field::_name_offset;
3597 int java_lang_reflect_Field::_type_offset;
3598 int java_lang_reflect_Field::_slot_offset;
3599 int java_lang_reflect_Field::_modifiers_offset;
3600 int java_lang_reflect_Field::_trusted_final_offset;
3601 int java_lang_reflect_Field::_signature_offset;
3602 int java_lang_reflect_Field::_annotations_offset;
3603
3604 #define FIELD_FIELDS_DO(macro) \
3605 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3606 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3607 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \
3608 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3609 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3610 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \
3611 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3612 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3613
3614 void java_lang_reflect_Field::compute_offsets() {
3615 InstanceKlass* k = vmClasses::reflect_Field_klass();
3616 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3617 }
3618
3619 #if INCLUDE_CDS
3620 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3621 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3622 }
3623 #endif
3624
3625 Handle java_lang_reflect_Field::create(TRAPS) {
3626 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3627 Symbol* name = vmSymbols::java_lang_reflect_Field();
3628 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3629 InstanceKlass* ik = InstanceKlass::cast(k);
3630 // Ensure it is initialized
3631 ik->initialize(CHECK_NH);
3632 return ik->allocate_instance_handle(THREAD);
3633 }
3634
3635 oop java_lang_reflect_Field::clazz(oop reflect) {
3636 return reflect->obj_field(_clazz_offset);
3637 }
3638
3639 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3640 reflect->obj_field_put(_clazz_offset, value);
3641 }
3642
3643 oop java_lang_reflect_Field::name(oop field) {
3644 return field->obj_field(_name_offset);
3645 }
3646
3647 void java_lang_reflect_Field::set_name(oop field, oop value) {
3648 field->obj_field_put(_name_offset, value);
3649 }
3650
3651 oop java_lang_reflect_Field::type(oop field) {
3652 return field->obj_field(_type_offset);
3653 }
3654
3655 void java_lang_reflect_Field::set_type(oop field, oop value) {
3656 field->obj_field_put(_type_offset, value);
3657 }
3658
3659 int java_lang_reflect_Field::slot(oop reflect) {
3660 return reflect->int_field(_slot_offset);
3661 }
3662
3663 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3664 reflect->int_field_put(_slot_offset, value);
3665 }
3666
3667 int java_lang_reflect_Field::modifiers(oop field) {
3668 return field->int_field(_modifiers_offset);
3669 }
3670
3671 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3672 field->int_field_put(_modifiers_offset, value);
3673 }
3674
3675 void java_lang_reflect_Field::set_trusted_final(oop field) {
3676 field->bool_field_put(_trusted_final_offset, true);
3677 }
3678
3679 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3680 field->obj_field_put(_signature_offset, value);
3681 }
3682
3683 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3684 field->obj_field_put(_annotations_offset, value);
3685 }
3686
3687 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3688 // Allocate java.lang.reflect.RecordComponent instance
3689 HandleMark hm(THREAD);
3690 InstanceKlass* ik = vmClasses::RecordComponent_klass();
3691 assert(ik != nullptr, "must be loaded");
3692 ik->initialize(CHECK_NULL);
3693
3694 Handle element = ik->allocate_instance_handle(CHECK_NULL);
3695
3696 Handle decl_class(THREAD, holder->java_mirror());
3697 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3698
3699 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3700 oop component_name = StringTable::intern(name, CHECK_NULL);
3701 java_lang_reflect_RecordComponent::set_name(element(), component_name);
3702
3703 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3704 Handle component_type_h =
3705 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3706 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3707
3708 Method* accessor_method = nullptr;
3709 {
3710 // Prepend "()" to type to create the full method signature.
3711 ResourceMark rm(THREAD);
3712 int sig_len = type->utf8_length() + 3; // "()" and null char
3713 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3714 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3715 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3716 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3717 }
3718
3719 if (accessor_method != nullptr) {
3720 methodHandle method(THREAD, accessor_method);
3721 oop m = Reflection::new_method(method, false, CHECK_NULL);
3722 java_lang_reflect_RecordComponent::set_accessor(element(), m);
3723 } else {
3724 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3725 }
3726
3727 int sig_index = component->generic_signature_index();
3728 if (sig_index > 0) {
3729 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3730 oop component_sig = StringTable::intern(sig, CHECK_NULL);
3731 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3732 } else {
3733 java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3734 }
3735
3736 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3737 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3738
3739 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3740 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3741
3742 return element();
3743 }
3744
3745 int reflect_ConstantPool::_oop_offset;
3746
3747 #define CONSTANTPOOL_FIELDS_DO(macro) \
3748 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3749
3750 void reflect_ConstantPool::compute_offsets() {
3751 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3752 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3753 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3754 }
3755
3756 #if INCLUDE_CDS
3757 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3758 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3759 }
3760 #endif
3761
3762 int java_lang_reflect_Parameter::_name_offset;
3763 int java_lang_reflect_Parameter::_modifiers_offset;
3764 int java_lang_reflect_Parameter::_index_offset;
3765 int java_lang_reflect_Parameter::_executable_offset;
3766
3767 #define PARAMETER_FIELDS_DO(macro) \
3768 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3769 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3770 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \
3771 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3772
3773 void java_lang_reflect_Parameter::compute_offsets() {
3774 InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3775 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3776 }
3777
3778 #if INCLUDE_CDS
3779 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3780 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3781 }
3782 #endif
3783
3784 Handle java_lang_reflect_Parameter::create(TRAPS) {
3785 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3786 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3787 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3788 InstanceKlass* ik = InstanceKlass::cast(k);
3789 // Ensure it is initialized
3790 ik->initialize(CHECK_NH);
3791 return ik->allocate_instance_handle(THREAD);
3792 }
3793
3794 oop java_lang_reflect_Parameter::name(oop param) {
3795 return param->obj_field(_name_offset);
3796 }
3797
3798 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3799 param->obj_field_put(_name_offset, value);
3800 }
3801
3802 int java_lang_reflect_Parameter::modifiers(oop param) {
3803 return param->int_field(_modifiers_offset);
3804 }
3805
3806 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3807 param->int_field_put(_modifiers_offset, value);
3808 }
3809
3810 int java_lang_reflect_Parameter::index(oop param) {
3811 return param->int_field(_index_offset);
3812 }
3813
3814 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3815 param->int_field_put(_index_offset, value);
3816 }
3817
3818 oop java_lang_reflect_Parameter::executable(oop param) {
3819 return param->obj_field(_executable_offset);
3820 }
3821
3822 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3823 param->obj_field_put(_executable_offset, value);
3824 }
3825
3826 // java_lang_Module
3827
3828 int java_lang_Module::_loader_offset;
3829 int java_lang_Module::_name_offset;
3830 int java_lang_Module::_module_entry_offset;
3831
3832 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3833 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3834 return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3835 vmSymbols::java_lang_module_init_signature(),
3836 loader, module_name, CHECK_NH);
3837 }
3838
3839 #define MODULE_FIELDS_DO(macro) \
3840 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3841 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false)
3842
3843 void java_lang_Module::compute_offsets() {
3844 InstanceKlass* k = vmClasses::Module_klass();
3845 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3846 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3847 }
3848
3849 #if INCLUDE_CDS
3850 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3851 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3852 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3853 }
3854 #endif
3855
3856 oop java_lang_Module::loader(oop module) {
3857 return module->obj_field(_loader_offset);
3858 }
3859
3860 void java_lang_Module::set_loader(oop module, oop value) {
3861 module->obj_field_put(_loader_offset, value);
3862 }
3863
3864 oop java_lang_Module::name(oop module) {
3865 return module->obj_field(_name_offset);
3866 }
3867
3868 void java_lang_Module::set_name(oop module, oop value) {
3869 module->obj_field_put(_name_offset, value);
3870 }
3871
3872 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3873 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3874 assert(module != nullptr, "module can't be null");
3875 assert(oopDesc::is_oop(module), "module must be oop");
3876
3877 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3878 return module_entry;
3879 }
3880
3881 ModuleEntry* java_lang_Module::module_entry(oop module) {
3882 ModuleEntry* module_entry = module_entry_raw(module);
3883 if (module_entry == nullptr) {
3884 // If the inject field containing the ModuleEntry* is null then return the
3885 // class loader's unnamed module.
3886 oop loader = java_lang_Module::loader(module);
3887 Handle h_loader = Handle(Thread::current(), loader);
3888 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3889 return loader_cld->unnamed_module();
3890 }
3891 return module_entry;
3892 }
3893
3894 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3895 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3896 assert(module != nullptr, "module can't be null");
3897 assert(oopDesc::is_oop(module), "module must be oop");
3898 module->address_field_put(_module_entry_offset, (address)module_entry);
3899 }
3900
3901 Handle reflect_ConstantPool::create(TRAPS) {
3902 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3903 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3904 // Ensure it is initialized
3905 k->initialize(CHECK_NH);
3906 return k->allocate_instance_handle(THREAD);
3907 }
3908
3909
3910 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3911 oop mirror = value->pool_holder()->java_mirror();
3912 // Save the mirror to get back the constant pool.
3913 reflect->obj_field_put(_oop_offset, mirror);
3914 }
3915
3916 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3917
3918 oop mirror = reflect->obj_field(_oop_offset);
3919 Klass* k = java_lang_Class::as_Klass(mirror);
3920 assert(k->is_instance_klass(), "Must be");
3921
3922 // Get the constant pool back from the klass. Since class redefinition
3923 // merges the new constant pool into the old, this is essentially the
3924 // same constant pool as the original. If constant pool merging is
3925 // no longer done in the future, this will have to change to save
3926 // the original.
3927 return InstanceKlass::cast(k)->constants();
3928 }
3929
3930
3931 // Support for java_lang_ref_Reference
3932
3933 bool java_lang_ref_Reference::_offsets_initialized;
3934
3935 int java_lang_ref_Reference::_referent_offset;
3936 int java_lang_ref_Reference::_queue_offset;
3937 int java_lang_ref_Reference::_next_offset;
3938 int java_lang_ref_Reference::_discovered_offset;
3939
3940 #define REFERENCE_FIELDS_DO(macro) \
3941 macro(_referent_offset, k, "referent", object_signature, false); \
3942 macro(_queue_offset, k, "queue", referencequeue_signature, false); \
3943 macro(_next_offset, k, "next", reference_signature, false); \
3944 macro(_discovered_offset, k, "discovered", reference_signature, false);
3945
3946 void java_lang_ref_Reference::compute_offsets() {
3947 if (_offsets_initialized) {
3948 return;
3949 }
3950 _offsets_initialized = true;
3951 InstanceKlass* k = vmClasses::Reference_klass();
3952 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3953 }
3954
3955 #if INCLUDE_CDS
3956 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3957 f->do_bool(&_offsets_initialized);
3958 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3959 }
3960 #endif
3961
3962 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3963 assert(obj != nullptr, "sanity");
3964 if (offset != _referent_offset) {
3965 return false;
3966 }
3967
3968 Klass* k = obj->klass();
3969 if (!k->is_instance_klass()) {
3970 return false;
3971 }
3972
3973 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3974 bool is_reference = ik->reference_type() != REF_NONE;
3975 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
3976 return is_reference;
3977 }
3978
3979 int java_lang_boxing_object::_value_offset;
3980 int java_lang_boxing_object::_long_value_offset;
3981
3982 #define BOXING_FIELDS_DO(macro) \
3983 macro(_value_offset, integerKlass, "value", int_signature, false); \
3984 macro(_long_value_offset, longKlass, "value", long_signature, false);
3985
3986 void java_lang_boxing_object::compute_offsets() {
3987 InstanceKlass* integerKlass = vmClasses::Integer_klass();
3988 InstanceKlass* longKlass = vmClasses::Long_klass();
3989 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3990 }
3991
3992 #if INCLUDE_CDS
3993 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
3994 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3995 }
3996 #endif
3997
3998 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3999 Klass* k = vmClasses::box_klass(type);
4000 if (k == nullptr) return nullptr;
4001 InstanceKlass* ik = InstanceKlass::cast(k);
4002 if (!ik->is_initialized()) {
4003 ik->initialize(CHECK_NULL);
4004 }
4005 return ik->allocate_instance(THREAD);
4006 }
4007
4008
4009 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
4010 oop box = initialize_and_allocate(type, CHECK_NULL);
4011 if (box == nullptr) return nullptr;
4012 switch (type) {
4013 case T_BOOLEAN:
4014 box->bool_field_put(_value_offset, value->z);
4015 break;
4016 case T_CHAR:
4017 box->char_field_put(_value_offset, value->c);
4018 break;
4019 case T_FLOAT:
4020 box->float_field_put(_value_offset, value->f);
4021 break;
4022 case T_DOUBLE:
4023 box->double_field_put(_long_value_offset, value->d);
4024 break;
4025 case T_BYTE:
4026 box->byte_field_put(_value_offset, value->b);
4027 break;
4028 case T_SHORT:
4029 box->short_field_put(_value_offset, value->s);
4030 break;
4031 case T_INT:
4032 box->int_field_put(_value_offset, value->i);
4033 break;
4034 case T_LONG:
4035 box->long_field_put(_long_value_offset, value->j);
4036 break;
4037 default:
4038 return nullptr;
4039 }
4040 return box;
4041 }
4042
4043
4044 BasicType java_lang_boxing_object::basic_type(oop box) {
4045 if (box == nullptr) return T_ILLEGAL;
4046 BasicType type = vmClasses::box_klass_type(box->klass());
4047 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
4048 return T_ILLEGAL;
4049 return type;
4050 }
4051
4052
4053 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
4054 BasicType type = vmClasses::box_klass_type(box->klass());
4055 switch (type) {
4056 case T_BOOLEAN:
4057 value->z = box->bool_field(_value_offset);
4058 break;
4059 case T_CHAR:
4060 value->c = box->char_field(_value_offset);
4061 break;
4062 case T_FLOAT:
4063 value->f = box->float_field(_value_offset);
4064 break;
4065 case T_DOUBLE:
4066 value->d = box->double_field(_long_value_offset);
4067 break;
4068 case T_BYTE:
4069 value->b = box->byte_field(_value_offset);
4070 break;
4071 case T_SHORT:
4072 value->s = box->short_field(_value_offset);
4073 break;
4074 case T_INT:
4075 value->i = box->int_field(_value_offset);
4076 break;
4077 case T_LONG:
4078 value->j = box->long_field(_long_value_offset);
4079 break;
4080 default:
4081 return T_ILLEGAL;
4082 } // end switch
4083 return type;
4084 }
4085
4086
4087 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
4088 BasicType type = vmClasses::box_klass_type(box->klass());
4089 switch (type) {
4090 case T_BOOLEAN:
4091 box->bool_field_put(_value_offset, value->z);
4092 break;
4093 case T_CHAR:
4094 box->char_field_put(_value_offset, value->c);
4095 break;
4096 case T_FLOAT:
4097 box->float_field_put(_value_offset, value->f);
4098 break;
4099 case T_DOUBLE:
4100 box->double_field_put(_long_value_offset, value->d);
4101 break;
4102 case T_BYTE:
4103 box->byte_field_put(_value_offset, value->b);
4104 break;
4105 case T_SHORT:
4106 box->short_field_put(_value_offset, value->s);
4107 break;
4108 case T_INT:
4109 box->int_field_put(_value_offset, value->i);
4110 break;
4111 case T_LONG:
4112 box->long_field_put(_long_value_offset, value->j);
4113 break;
4114 default:
4115 return T_ILLEGAL;
4116 } // end switch
4117 return type;
4118 }
4119
4120
4121 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
4122 switch (type) {
4123 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
4124 case T_CHAR: st->print("%d", value->c); break;
4125 case T_BYTE: st->print("%d", value->b); break;
4126 case T_SHORT: st->print("%d", value->s); break;
4127 case T_INT: st->print("%d", value->i); break;
4128 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
4129 case T_FLOAT: st->print("%f", value->f); break;
4130 case T_DOUBLE: st->print("%lf", value->d); break;
4131 default: st->print("type %d?", type); break;
4132 }
4133 }
4134
4135
4136 // Support for java_lang_ref_SoftReference
4137 //
4138
4139 int java_lang_ref_SoftReference::_timestamp_offset;
4140 int java_lang_ref_SoftReference::_static_clock_offset;
4141
4142 #define SOFTREFERENCE_FIELDS_DO(macro) \
4143 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
4144 macro(_static_clock_offset, k, "clock", long_signature, true)
4145
4146 void java_lang_ref_SoftReference::compute_offsets() {
4147 InstanceKlass* k = vmClasses::SoftReference_klass();
4148 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4149 }
4150
4151 #if INCLUDE_CDS
4152 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
4153 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4154 }
4155 #endif
4156
4157 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
4158 return ref->long_field(_timestamp_offset);
4159 }
4160
4161 jlong java_lang_ref_SoftReference::clock() {
4162 InstanceKlass* ik = vmClasses::SoftReference_klass();
4163 oop base = ik->static_field_base_raw();
4164 return base->long_field(_static_clock_offset);
4165 }
4166
4167 void java_lang_ref_SoftReference::set_clock(jlong value) {
4168 InstanceKlass* ik = vmClasses::SoftReference_klass();
4169 oop base = ik->static_field_base_raw();
4170 base->long_field_put(_static_clock_offset, value);
4171 }
4172
4173 // Support for java_lang_invoke_DirectMethodHandle
4174
4175 int java_lang_invoke_DirectMethodHandle::_member_offset;
4176
4177 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
4178 oop member_name = nullptr;
4179 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
4180 "a DirectMethodHandle oop is expected");
4181 return dmh->obj_field(_member_offset);
4182 }
4183
4184 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
4185 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
4186
4187 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
4188 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
4189 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4190 }
4191
4192 #if INCLUDE_CDS
4193 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
4194 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4195 }
4196 #endif
4197
4198 // Support for java_lang_invoke_MethodHandle
4199
4200 int java_lang_invoke_MethodHandle::_type_offset;
4201 int java_lang_invoke_MethodHandle::_form_offset;
4202
4203 int java_lang_invoke_MemberName::_clazz_offset;
4204 int java_lang_invoke_MemberName::_name_offset;
4205 int java_lang_invoke_MemberName::_type_offset;
4206 int java_lang_invoke_MemberName::_flags_offset;
4207 int java_lang_invoke_MemberName::_method_offset;
4208 int java_lang_invoke_MemberName::_vmindex_offset;
4209
4210 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
4211 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
4212
4213 int java_lang_invoke_LambdaForm::_vmentry_offset;
4214
4215 #define METHODHANDLE_FIELDS_DO(macro) \
4216 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4217 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
4218
4219 void java_lang_invoke_MethodHandle::compute_offsets() {
4220 InstanceKlass* k = vmClasses::MethodHandle_klass();
4221 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4222 }
4223
4224 #if INCLUDE_CDS
4225 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4226 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4227 }
4228 #endif
4229
4230 #define MEMBERNAME_FIELDS_DO(macro) \
4231 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4232 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4233 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
4234 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
4235 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
4236
4237 void java_lang_invoke_MemberName::compute_offsets() {
4238 InstanceKlass* k = vmClasses::MemberName_klass();
4239 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4240 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4241 }
4242
4243 #if INCLUDE_CDS
4244 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4245 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4246 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4247 }
4248 #endif
4249
4250 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4251 macro(_vmholder_offset, k, "vmholder", class_signature, false)
4252
4253 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4254 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4255 assert(k != nullptr, "jdk mismatch");
4256 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4257 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4258 }
4259
4260 #if INCLUDE_CDS
4261 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4262 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4263 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4264 }
4265 #endif
4266
4267 #define LAMBDAFORM_FIELDS_DO(macro) \
4268 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4269
4270 void java_lang_invoke_LambdaForm::compute_offsets() {
4271 InstanceKlass* k = vmClasses::LambdaForm_klass();
4272 assert (k != nullptr, "jdk mismatch");
4273 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4274 }
4275
4276 #if INCLUDE_CDS
4277 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4278 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4279 }
4280 #endif
4281
4282 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4283 return obj != nullptr && is_subclass(obj->klass());
4284 }
4285
4286 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4287 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4288
4289 #define NEP_FIELDS_DO(macro) \
4290 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
4291 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4292
4293 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4294 return obj != nullptr && is_subclass(obj->klass());
4295 }
4296
4297 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4298 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4299 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4300 }
4301
4302 #if INCLUDE_CDS
4303 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4304 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4305 }
4306 #endif
4307
4308 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4309 return entry->obj_field(_method_type_offset);
4310 }
4311
4312 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4313 return entry->long_field(_downcall_stub_address_offset);
4314 }
4315
4316 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4317 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4318 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4319 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4320 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4321 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4322 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4323
4324 #define ABIDescriptor_FIELDS_DO(macro) \
4325 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4326 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4327 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4328 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4329 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4330 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4331 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4332
4333 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4334 return obj != nullptr && is_subclass(obj->klass());
4335 }
4336
4337 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4338 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4339 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4340 }
4341
4342 #if INCLUDE_CDS
4343 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4344 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4345 }
4346 #endif
4347
4348 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4349 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4350 }
4351
4352 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4353 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4354 }
4355
4356 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4357 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4358 }
4359
4360 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4361 return entry->int_field(_stackAlignment_offset);
4362 }
4363
4364 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4365 return entry->int_field(_shadowSpace_offset);
4366 }
4367
4368 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4369 return entry->obj_field(_scratch1_offset);
4370 }
4371
4372 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4373 return entry->obj_field(_scratch2_offset);
4374 }
4375
4376 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4377 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4378 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4379 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4380
4381 #define VMStorage_FIELDS_DO(macro) \
4382 macro(_type_offset, k, "type", byte_signature, false); \
4383 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4384 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4385 macro(_debugName_offset, k, "debugName", string_signature, false); \
4386
4387 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4388 return obj != nullptr && is_subclass(obj->klass());
4389 }
4390
4391 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4392 InstanceKlass* k = vmClasses::VMStorage_klass();
4393 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4394 }
4395
4396 #if INCLUDE_CDS
4397 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4398 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4399 }
4400 #endif
4401
4402 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4403 return entry->byte_field(_type_offset);
4404 }
4405
4406 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4407 return entry->int_field(_indexOrOffset_offset);
4408 }
4409
4410 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4411 return entry->short_field(_segmentMaskOrSize_offset);
4412 }
4413
4414 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4415 return entry->obj_field(_debugName_offset);
4416 }
4417
4418 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4419 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4420
4421 #define CallConv_FIELDS_DO(macro) \
4422 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4423 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4424
4425 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4426 return obj != nullptr && is_subclass(obj->klass());
4427 }
4428
4429 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4430 InstanceKlass* k = vmClasses::CallConv_klass();
4431 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4432 }
4433
4434 #if INCLUDE_CDS
4435 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4436 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4437 }
4438 #endif
4439
4440 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4441 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4442 }
4443
4444 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4445 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4446 }
4447
4448 oop java_lang_invoke_MethodHandle::type(oop mh) {
4449 return mh->obj_field(_type_offset);
4450 }
4451
4452 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4453 mh->obj_field_put(_type_offset, mtype);
4454 }
4455
4456 oop java_lang_invoke_MethodHandle::form(oop mh) {
4457 assert(_form_offset != 0, "");
4458 return mh->obj_field(_form_offset);
4459 }
4460
4461 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4462 assert(_form_offset != 0, "");
4463 mh->obj_field_put(_form_offset, lform);
4464 }
4465
4466 /// MemberName accessors
4467
4468 oop java_lang_invoke_MemberName::clazz(oop mname) {
4469 assert(is_instance(mname), "wrong type");
4470 return mname->obj_field(_clazz_offset);
4471 }
4472
4473 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4474 assert(is_instance(mname), "wrong type");
4475 mname->obj_field_put(_clazz_offset, clazz);
4476 }
4477
4478 oop java_lang_invoke_MemberName::name(oop mname) {
4479 assert(is_instance(mname), "wrong type");
4480 return mname->obj_field(_name_offset);
4481 }
4482
4483 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4484 assert(is_instance(mname), "wrong type");
4485 mname->obj_field_put(_name_offset, name);
4486 }
4487
4488 oop java_lang_invoke_MemberName::type(oop mname) {
4489 assert(is_instance(mname), "wrong type");
4490 return mname->obj_field(_type_offset);
4491 }
4492
4493 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4494 assert(is_instance(mname), "wrong type");
4495 mname->obj_field_put(_type_offset, type);
4496 }
4497
4498 int java_lang_invoke_MemberName::flags(oop mname) {
4499 assert(is_instance(mname), "wrong type");
4500 return mname->int_field(_flags_offset);
4501 }
4502
4503 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4504 assert(is_instance(mname), "wrong type");
4505 mname->int_field_put(_flags_offset, flags);
4506 }
4507
4508
4509 // Return vmtarget from ResolvedMethodName method field through indirection
4510 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4511 assert(is_instance(mname), "wrong type");
4512 oop method = mname->obj_field(_method_offset);
4513 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4514 }
4515
4516 bool java_lang_invoke_MemberName::is_method(oop mname) {
4517 assert(is_instance(mname), "must be MemberName");
4518 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
4519 }
4520
4521 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4522 assert(is_instance(mname), "wrong type");
4523 mname->obj_field_put(_method_offset, resolved_method);
4524 }
4525
4526 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4527 assert(is_instance(mname), "wrong type");
4528 return (intptr_t) mname->address_field(_vmindex_offset);
4529 }
4530
4531 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4532 assert(is_instance(mname), "wrong type");
4533 mname->address_field_put(_vmindex_offset, (address) index);
4534 }
4535
4536
4537 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4538 assert(is_instance(resolved_method), "wrong type");
4539 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4540 assert(m->is_method(), "must be");
4541 return m;
4542 }
4543
4544 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4545 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4546 assert(is_instance(resolved_method), "wrong type");
4547 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4548 }
4549
4550 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4551 assert(is_instance(resolved_method), "wrong type");
4552 resolved_method->obj_field_put(_vmholder_offset, holder);
4553 }
4554
4555 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4556 const Method* method = m();
4557
4558 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4559 oop resolved_method = ResolvedMethodTable::find_method(method);
4560 if (resolved_method != nullptr) {
4561 return resolved_method;
4562 }
4563
4564 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4565 if (!k->is_initialized()) {
4566 k->initialize(CHECK_NULL);
4567 }
4568
4569 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4570
4571 NoSafepointVerifier nsv;
4572
4573 if (method->is_old()) {
4574 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4575 method->get_new_method();
4576 }
4577
4578 InstanceKlass* holder = method->method_holder();
4579
4580 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4581 // Add a reference to the loader (actually mirror because hidden classes may not have
4582 // distinct loaders) to ensure the metadata is kept alive.
4583 // This mirror may be different than the one in clazz field.
4584 set_vmholder(new_resolved_method, holder->java_mirror());
4585
4586 // Set flag in class to indicate this InstanceKlass has entries in the table
4587 // to avoid walking table during redefinition if none of the redefined classes
4588 // have any membernames in the table.
4589 holder->set_has_resolved_methods();
4590
4591 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4592 }
4593
4594 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4595 assert(is_instance(lform), "wrong type");
4596 return lform->obj_field(_vmentry_offset);
4597 }
4598
4599
4600 // Support for java_lang_invoke_MethodType
4601
4602 int java_lang_invoke_MethodType::_rtype_offset;
4603 int java_lang_invoke_MethodType::_ptypes_offset;
4604
4605 #define METHODTYPE_FIELDS_DO(macro) \
4606 macro(_rtype_offset, k, "rtype", class_signature, false); \
4607 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4608
4609 void java_lang_invoke_MethodType::compute_offsets() {
4610 InstanceKlass* k = vmClasses::MethodType_klass();
4611 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4612 }
4613
4614 #if INCLUDE_CDS
4615 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4616 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4617 }
4618 #endif
4619
4620 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4621 st->print("(");
4622 objArrayOop pts = ptypes(mt);
4623 if (pts != nullptr) {
4624 for (int i = 0, limit = pts->length(); i < limit; i++) {
4625 java_lang_Class::print_signature(pts->obj_at(i), st);
4626 }
4627 } else {
4628 st->print("null");
4629 }
4630 st->print(")");
4631 oop rt = rtype(mt);
4632 if (rt != nullptr) {
4633 java_lang_Class::print_signature(rt, st);
4634 } else {
4635 st->print("null");
4636 }
4637 }
4638
4639 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4640 ResourceMark rm;
4641 stringStream buffer(128);
4642 print_signature(mt, &buffer);
4643 const char* sigstr = buffer.base();
4644 int siglen = (int) buffer.size();
4645 Symbol *name;
4646 if (!intern_if_not_found) {
4647 name = SymbolTable::probe(sigstr, siglen);
4648 } else {
4649 name = SymbolTable::new_symbol(sigstr, siglen);
4650 }
4651 return name;
4652 }
4653
4654 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4655 if (mt1 == mt2)
4656 return true;
4657 if (rtype(mt1) != rtype(mt2))
4658 return false;
4659 if (ptype_count(mt1) != ptype_count(mt2))
4660 return false;
4661 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4662 if (ptype(mt1, i) != ptype(mt2, i))
4663 return false;
4664 }
4665 return true;
4666 }
4667
4668 oop java_lang_invoke_MethodType::rtype(oop mt) {
4669 assert(is_instance(mt), "must be a MethodType");
4670 return mt->obj_field(_rtype_offset);
4671 }
4672
4673 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4674 assert(is_instance(mt), "must be a MethodType");
4675 return (objArrayOop) mt->obj_field(_ptypes_offset);
4676 }
4677
4678 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4679 return ptypes(mt)->obj_at(idx);
4680 }
4681
4682 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4683 return ptypes(mt)->length();
4684 }
4685
4686 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4687 objArrayOop pts = ptypes(mt);
4688 int count = pts->length();
4689 int slots = 0;
4690 for (int i = 0; i < count; i++) {
4691 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4692 slots += type2size[bt];
4693 }
4694 return slots;
4695 }
4696
4697 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4698 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4699 return type2size[bt];
4700 }
4701
4702
4703 // Support for java_lang_invoke_CallSite
4704
4705 int java_lang_invoke_CallSite::_target_offset;
4706 int java_lang_invoke_CallSite::_vmdependencies_offset;
4707 int java_lang_invoke_CallSite::_last_cleanup_offset;
4708
4709 #define CALLSITE_FIELDS_DO(macro) \
4710 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
4711
4712 void java_lang_invoke_CallSite::compute_offsets() {
4713 InstanceKlass* k = vmClasses::CallSite_klass();
4714 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4715 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4716 }
4717
4718 #if INCLUDE_CDS
4719 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4720 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4721 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4722 }
4723 #endif
4724
4725 DependencyContext java_lang_invoke_CallSite::vmdependencies(oop call_site) {
4726 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4727 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4728 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4729 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4730 return dep_ctx;
4731 }
4732
4733 // Support for java_lang_invoke_ConstantCallSite
4734
4735 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4736
4737 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4738 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4739
4740 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4741 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4742 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4743 }
4744
4745 #if INCLUDE_CDS
4746 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4747 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4748 }
4749 #endif
4750
4751 // Support for java_lang_ClassLoader
4752
4753 int java_lang_ClassLoader::_loader_data_offset;
4754 int java_lang_ClassLoader::_parallelCapable_offset;
4755 int java_lang_ClassLoader::_name_offset;
4756 int java_lang_ClassLoader::_nameAndId_offset;
4757 int java_lang_ClassLoader::_unnamedModule_offset;
4758 int java_lang_ClassLoader::_parent_offset;
4759
4760 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4761 assert(loader != nullptr, "loader must not be null");
4762 assert(oopDesc::is_oop(loader), "loader must be oop");
4763 return AtomicAccess::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4764 }
4765
4766 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4767 assert(loader != nullptr, "loader must not be null");
4768 assert(oopDesc::is_oop(loader), "loader must be oop");
4769 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4770 }
4771
4772 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4773 assert(loader != nullptr, "loader must not be null");
4774 assert(oopDesc::is_oop(loader), "loader must be oop");
4775 AtomicAccess::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4776 }
4777
4778 #define CLASSLOADER_FIELDS_DO(macro) \
4779 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4780 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4781 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
4782 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4783 macro(_parent_offset, k1, "parent", classloader_signature, false)
4784
4785 void java_lang_ClassLoader::compute_offsets() {
4786 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4787 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4788
4789 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4790 }
4791
4792 #if INCLUDE_CDS
4793 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4794 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4795 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4796 }
4797 #endif
4798
4799 oop java_lang_ClassLoader::parent(oop loader) {
4800 assert(is_instance(loader), "loader must be oop");
4801 return loader->obj_field(_parent_offset);
4802 }
4803
4804 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4805 assert(is_instance(loader), "loader must be oop");
4806 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4807 }
4808
4809 // Returns the name field of this class loader. If the name field has not
4810 // been set, null will be returned.
4811 oop java_lang_ClassLoader::name(oop loader) {
4812 assert(is_instance(loader), "loader must be oop");
4813 return loader->obj_field(_name_offset);
4814 }
4815
4816 // Returns the nameAndId field of this class loader. The format is
4817 // as follows:
4818 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4819 // If the defining loader has no name then <qualified-class-name> @<id>
4820 // If built-in loader, then omit '@<id>' as there is only one instance.
4821 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4822 oop java_lang_ClassLoader::nameAndId(oop loader) {
4823 assert(is_instance(loader), "loader must be oop");
4824 return loader->obj_field(_nameAndId_offset);
4825 }
4826
4827 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4828 assert(is_instance(loader), "loader must be oop");
4829 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4830 oop acl = loader;
4831 DEBUG_ONLY(jint loop_count = 0);
4832 // This loop taken verbatim from ClassLoader.java:
4833 do {
4834 acl = parent(acl);
4835 if (cl == acl) {
4836 return true;
4837 }
4838 assert(++loop_count > 0, "loop_count overflow");
4839 } while (acl != nullptr);
4840 return false;
4841 }
4842
4843 bool java_lang_ClassLoader::is_instance(oop obj) {
4844 return obj != nullptr && is_subclass(obj->klass());
4845 }
4846
4847
4848 // For class loader classes, parallelCapable defined
4849 // based on non-null field
4850 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4851 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4852 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4853 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4854 }
4855
4856 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4857 oop cl = SystemDictionary::java_system_loader();
4858 while(cl != nullptr) {
4859 if (cl == loader) return true;
4860 cl = parent(cl);
4861 }
4862 return false;
4863 }
4864
4865 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4866 assert(is_instance(loader), "loader must be oop");
4867 return loader->obj_field(_unnamedModule_offset);
4868 }
4869
4870 // Support for java_lang_System
4871 //
4872
4873 int java_lang_System::_static_in_offset;
4874 int java_lang_System::_static_out_offset;
4875 int java_lang_System::_static_err_offset;
4876
4877 #define SYSTEM_FIELDS_DO(macro) \
4878 macro(_static_in_offset, k, "in", input_stream_signature, true); \
4879 macro(_static_out_offset, k, "out", print_stream_signature, true); \
4880 macro(_static_err_offset, k, "err", print_stream_signature, true);
4881
4882 void java_lang_System::compute_offsets() {
4883 InstanceKlass* k = vmClasses::System_klass();
4884 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4885 }
4886
4887 #if INCLUDE_CDS
4888 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4889 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4890 }
4891 #endif
4892
4893 // Support for jdk_internal_misc_UnsafeConstants
4894 //
4895 class UnsafeConstantsFixup : public FieldClosure {
4896 private:
4897 int _address_size;
4898 int _page_size;
4899 bool _big_endian;
4900 bool _use_unaligned_access;
4901 int _data_cache_line_flush_size;
4902 public:
4903 UnsafeConstantsFixup() {
4904 // round up values for all static final fields
4905 _address_size = sizeof(void*);
4906 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4907 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4908 _use_unaligned_access = UseUnalignedAccesses;
4909 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4910 }
4911
4912 void do_field(fieldDescriptor* fd) {
4913 oop mirror = fd->field_holder()->java_mirror();
4914 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4915 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4916 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4917 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4918 if (fd->name() == vmSymbols::address_size_name()) {
4919 mirror->int_field_put(fd->offset(), _address_size);
4920 } else if (fd->name() == vmSymbols::page_size_name()) {
4921 mirror->int_field_put(fd->offset(), _page_size);
4922 } else if (fd->name() == vmSymbols::big_endian_name()) {
4923 mirror->bool_field_put(fd->offset(), _big_endian);
4924 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4925 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4926 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4927 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4928 } else {
4929 assert(false, "unexpected UnsafeConstants field");
4930 }
4931 }
4932 };
4933
4934 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4935 UnsafeConstantsFixup fixup;
4936 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4937 }
4938
4939
4940 // java_lang_StackTraceElement
4941
4942 int java_lang_StackTraceElement::_methodName_offset;
4943 int java_lang_StackTraceElement::_fileName_offset;
4944 int java_lang_StackTraceElement::_lineNumber_offset;
4945 int java_lang_StackTraceElement::_moduleName_offset;
4946 int java_lang_StackTraceElement::_moduleVersion_offset;
4947 int java_lang_StackTraceElement::_classLoaderName_offset;
4948 int java_lang_StackTraceElement::_declaringClass_offset;
4949 int java_lang_StackTraceElement::_declaringClassObject_offset;
4950
4951 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4952 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4953 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4954 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
4955 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4956 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
4957 macro(_methodName_offset, k, "methodName", string_signature, false); \
4958 macro(_fileName_offset, k, "fileName", string_signature, false); \
4959 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
4960
4961 // Support for java_lang_StackTraceElement
4962 void java_lang_StackTraceElement::compute_offsets() {
4963 InstanceKlass* k = vmClasses::StackTraceElement_klass();
4964 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4965 }
4966
4967 #if INCLUDE_CDS
4968 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4969 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4970 }
4971 #endif
4972
4973 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4974 element->obj_field_put(_fileName_offset, value);
4975 }
4976
4977 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4978 element->obj_field_put(_declaringClass_offset, value);
4979 }
4980
4981 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4982 element->obj_field_put(_methodName_offset, value);
4983 }
4984
4985 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4986 element->int_field_put(_lineNumber_offset, value);
4987 }
4988
4989 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4990 element->obj_field_put(_moduleName_offset, value);
4991 }
4992
4993 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4994 element->obj_field_put(_moduleVersion_offset, value);
4995 }
4996
4997 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4998 element->obj_field_put(_classLoaderName_offset, value);
4999 }
5000
5001 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
5002 element->obj_field_put(_declaringClassObject_offset, value);
5003 }
5004
5005
5006 // java_lang_AssertionStatusDirectives
5007
5008 int java_lang_AssertionStatusDirectives::_classes_offset;
5009 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
5010 int java_lang_AssertionStatusDirectives::_packages_offset;
5011 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
5012 int java_lang_AssertionStatusDirectives::_deflt_offset;
5013
5014 // Support for java Assertions - java_lang_AssertionStatusDirectives.
5015 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
5016 macro(_classes_offset, k, "classes", string_array_signature, false); \
5017 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
5018 macro(_packages_offset, k, "packages", string_array_signature, false); \
5019 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
5020 macro(_deflt_offset, k, "deflt", bool_signature, false)
5021
5022 void java_lang_AssertionStatusDirectives::compute_offsets() {
5023 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
5024 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5025 }
5026
5027 #if INCLUDE_CDS
5028 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
5029 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5030 }
5031 #endif
5032
5033 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
5034 o->obj_field_put(_classes_offset, val);
5035 }
5036
5037 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
5038 o->obj_field_put(_classEnabled_offset, val);
5039 }
5040
5041 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
5042 o->obj_field_put(_packages_offset, val);
5043 }
5044
5045 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
5046 o->obj_field_put(_packageEnabled_offset, val);
5047 }
5048
5049 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
5050 o->bool_field_put(_deflt_offset, val);
5051 }
5052
5053 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
5054
5055 #define AOS_FIELDS_DO(macro) \
5056 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
5057
5058 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
5059 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
5060 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5061 }
5062
5063 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
5064 assert(_owner_offset != 0, "Must be initialized");
5065 return obj->obj_field(_owner_offset);
5066 }
5067
5068 #if INCLUDE_CDS
5069 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
5070 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5071 }
5072 #endif
5073
5074 int vector_VectorPayload::_payload_offset;
5075
5076 #define VECTORPAYLOAD_FIELDS_DO(macro) \
5077 macro(_payload_offset, k, "payload", object_signature, false)
5078
5079 void vector_VectorPayload::compute_offsets() {
5080 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
5081 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5082 }
5083
5084 #if INCLUDE_CDS
5085 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
5086 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5087 }
5088 #endif
5089
5090 void vector_VectorPayload::set_payload(oop o, oop val) {
5091 o->obj_field_put(_payload_offset, val);
5092 }
5093
5094 bool vector_VectorPayload::is_instance(oop obj) {
5095 return obj != nullptr && is_subclass(obj->klass());
5096 }
5097
5098 int java_lang_Integer_IntegerCache::_static_cache_offset;
5099 int java_lang_Long_LongCache::_static_cache_offset;
5100 int java_lang_Character_CharacterCache::_static_cache_offset;
5101 int java_lang_Short_ShortCache::_static_cache_offset;
5102 int java_lang_Byte_ByteCache::_static_cache_offset;
5103
5104 #define INTEGER_CACHE_FIELDS_DO(macro) \
5105 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5106
5107 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5108 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5109 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5110 }
5111
5112 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5113 oop base = ik->static_field_base_raw();
5114 return objArrayOop(base->obj_field(_static_cache_offset));
5115 }
5116
5117 Symbol* java_lang_Integer_IntegerCache::symbol() {
5118 return vmSymbols::java_lang_Integer_IntegerCache();
5119 }
5120
5121 #if INCLUDE_CDS
5122 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5123 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5124 }
5125 #endif
5126 #undef INTEGER_CACHE_FIELDS_DO
5127
5128 jint java_lang_Integer::value(oop obj) {
5129 jvalue v;
5130 java_lang_boxing_object::get_value(obj, &v);
5131 return v.i;
5132 }
5133
5134 #define LONG_CACHE_FIELDS_DO(macro) \
5135 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5136
5137 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5138 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5139 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5140 }
5141
5142 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5143 oop base = ik->static_field_base_raw();
5144 return objArrayOop(base->obj_field(_static_cache_offset));
5145 }
5146
5147 Symbol* java_lang_Long_LongCache::symbol() {
5148 return vmSymbols::java_lang_Long_LongCache();
5149 }
5150
5151 #if INCLUDE_CDS
5152 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5153 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5154 }
5155 #endif
5156 #undef LONG_CACHE_FIELDS_DO
5157
5158 jlong java_lang_Long::value(oop obj) {
5159 jvalue v;
5160 java_lang_boxing_object::get_value(obj, &v);
5161 return v.j;
5162 }
5163
5164 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5165 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5166
5167 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5168 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5169 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5170 }
5171
5172 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5173 oop base = ik->static_field_base_raw();
5174 return objArrayOop(base->obj_field(_static_cache_offset));
5175 }
5176
5177 Symbol* java_lang_Character_CharacterCache::symbol() {
5178 return vmSymbols::java_lang_Character_CharacterCache();
5179 }
5180
5181 #if INCLUDE_CDS
5182 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5183 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5184 }
5185 #endif
5186 #undef CHARACTER_CACHE_FIELDS_DO
5187
5188 jchar java_lang_Character::value(oop obj) {
5189 jvalue v;
5190 java_lang_boxing_object::get_value(obj, &v);
5191 return v.c;
5192 }
5193
5194 #define SHORT_CACHE_FIELDS_DO(macro) \
5195 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5196
5197 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5198 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5199 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5200 }
5201
5202 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5203 oop base = ik->static_field_base_raw();
5204 return objArrayOop(base->obj_field(_static_cache_offset));
5205 }
5206
5207 Symbol* java_lang_Short_ShortCache::symbol() {
5208 return vmSymbols::java_lang_Short_ShortCache();
5209 }
5210
5211 #if INCLUDE_CDS
5212 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5213 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5214 }
5215 #endif
5216 #undef SHORT_CACHE_FIELDS_DO
5217
5218 jshort java_lang_Short::value(oop obj) {
5219 jvalue v;
5220 java_lang_boxing_object::get_value(obj, &v);
5221 return v.s;
5222 }
5223
5224 #define BYTE_CACHE_FIELDS_DO(macro) \
5225 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5226
5227 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5228 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5229 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5230 }
5231
5232 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5233 oop base = ik->static_field_base_raw();
5234 return objArrayOop(base->obj_field(_static_cache_offset));
5235 }
5236
5237 Symbol* java_lang_Byte_ByteCache::symbol() {
5238 return vmSymbols::java_lang_Byte_ByteCache();
5239 }
5240
5241 #if INCLUDE_CDS
5242 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5243 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5244 }
5245 #endif
5246 #undef BYTE_CACHE_FIELDS_DO
5247
5248 jbyte java_lang_Byte::value(oop obj) {
5249 jvalue v;
5250 java_lang_boxing_object::get_value(obj, &v);
5251 return v.b;
5252 }
5253
5254 int java_lang_Boolean::_static_TRUE_offset;
5255 int java_lang_Boolean::_static_FALSE_offset;
5256
5257 #define BOOLEAN_FIELDS_DO(macro) \
5258 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5259 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5260
5261
5262 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5263 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5264 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5265 }
5266
5267 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5268 oop base = ik->static_field_base_raw();
5269 return base->obj_field(_static_TRUE_offset);
5270 }
5271
5272 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5273 oop base = ik->static_field_base_raw();
5274 return base->obj_field(_static_FALSE_offset);
5275 }
5276
5277 Symbol* java_lang_Boolean::symbol() {
5278 return vmSymbols::java_lang_Boolean();
5279 }
5280
5281 #if INCLUDE_CDS
5282 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5283 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5284 }
5285 #endif
5286 #undef BOOLEAN_CACHE_FIELDS_DO
5287
5288 jboolean java_lang_Boolean::value(oop obj) {
5289 jvalue v;
5290 java_lang_boxing_object::get_value(obj, &v);
5291 return v.z;
5292 }
5293
5294 // java_lang_reflect_RecordComponent
5295
5296 int java_lang_reflect_RecordComponent::_clazz_offset;
5297 int java_lang_reflect_RecordComponent::_name_offset;
5298 int java_lang_reflect_RecordComponent::_type_offset;
5299 int java_lang_reflect_RecordComponent::_accessor_offset;
5300 int java_lang_reflect_RecordComponent::_signature_offset;
5301 int java_lang_reflect_RecordComponent::_annotations_offset;
5302 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5303
5304 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5305 macro(_clazz_offset, k, "clazz", class_signature, false); \
5306 macro(_name_offset, k, "name", string_signature, false); \
5307 macro(_type_offset, k, "type", class_signature, false); \
5308 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5309 macro(_signature_offset, k, "signature", string_signature, false); \
5310 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5311 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5312
5313 // Support for java_lang_reflect_RecordComponent
5314 void java_lang_reflect_RecordComponent::compute_offsets() {
5315 InstanceKlass* k = vmClasses::RecordComponent_klass();
5316 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5317 }
5318
5319 #if INCLUDE_CDS
5320 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5321 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5322 }
5323 #endif
5324
5325 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5326 element->obj_field_put(_clazz_offset, value);
5327 }
5328
5329 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5330 element->obj_field_put(_name_offset, value);
5331 }
5332
5333 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5334 element->obj_field_put(_type_offset, value);
5335 }
5336
5337 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5338 element->obj_field_put(_accessor_offset, value);
5339 }
5340
5341 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5342 element->obj_field_put(_signature_offset, value);
5343 }
5344
5345 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5346 element->obj_field_put(_annotations_offset, value);
5347 }
5348
5349 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5350 element->obj_field_put(_typeAnnotations_offset, value);
5351 }
5352
5353 // java_lang_InternalError
5354 int java_lang_InternalError::_during_unsafe_access_offset;
5355
5356 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5357 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5358 }
5359
5360 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5361 return internal_error->bool_field(_during_unsafe_access_offset);
5362 }
5363
5364 void java_lang_InternalError::compute_offsets() {
5365 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5366 }
5367
5368 #if INCLUDE_CDS
5369 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5370 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5371 }
5372 #endif
5373
5374 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5375 f(java_lang_Class) \
5376 f(java_lang_String) \
5377 f(java_lang_ref_Reference) \
5378 //end
5379
5380 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5381 f(java_lang_System) \
5382 f(java_lang_ClassLoader) \
5383 f(java_lang_Throwable) \
5384 f(java_lang_Thread) \
5385 f(java_lang_Thread_FieldHolder) \
5386 f(java_lang_Thread_Constants) \
5387 f(java_lang_ThreadGroup) \
5388 f(java_lang_VirtualThread) \
5389 f(java_lang_InternalError) \
5390 f(java_lang_AssertionStatusDirectives) \
5391 f(java_lang_ref_SoftReference) \
5392 f(java_lang_invoke_MethodHandle) \
5393 f(java_lang_invoke_DirectMethodHandle) \
5394 f(java_lang_invoke_MemberName) \
5395 f(java_lang_invoke_ResolvedMethodName) \
5396 f(java_lang_invoke_LambdaForm) \
5397 f(java_lang_invoke_MethodType) \
5398 f(java_lang_invoke_CallSite) \
5399 f(java_lang_invoke_ConstantCallSite) \
5400 f(java_lang_reflect_AccessibleObject) \
5401 f(java_lang_reflect_Method) \
5402 f(java_lang_reflect_Constructor) \
5403 f(java_lang_reflect_Field) \
5404 f(java_lang_reflect_RecordComponent) \
5405 f(reflect_ConstantPool) \
5406 f(java_lang_reflect_Parameter) \
5407 f(java_lang_Module) \
5408 f(java_lang_StackTraceElement) \
5409 f(java_lang_ClassFrameInfo) \
5410 f(java_lang_StackFrameInfo) \
5411 f(java_lang_LiveStackFrameInfo) \
5412 f(jdk_internal_vm_ContinuationScope) \
5413 f(jdk_internal_vm_Continuation) \
5414 f(jdk_internal_vm_StackChunk) \
5415 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5416 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5417 f(jdk_internal_foreign_abi_ABIDescriptor) \
5418 f(jdk_internal_foreign_abi_VMStorage) \
5419 f(jdk_internal_foreign_abi_CallConv) \
5420 f(jdk_internal_misc_UnsafeConstants) \
5421 f(java_lang_boxing_object) \
5422 f(vector_VectorPayload) \
5423 //end
5424
5425 #define BASIC_JAVA_CLASSES_DO(f) \
5426 BASIC_JAVA_CLASSES_DO_PART1(f) \
5427 BASIC_JAVA_CLASSES_DO_PART2(f)
5428
5429 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5430
5431 // Compute field offsets of all the classes in this file
5432 void JavaClasses::compute_offsets() {
5433 if (CDSConfig::is_using_archive()) {
5434 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5435 JvmtiExport::has_early_class_hook_env()),
5436 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5437 // None of the classes used by the rest of this function can be replaced by
5438 // JVMTI ClassFileLoadHook.
5439 // We are safe to use the archived offsets, which have already been restored
5440 // by JavaClasses::serialize_offsets, without computing the offsets again.
5441 return;
5442 }
5443
5444 // We have already called the compute_offsets() of the
5445 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5446 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5447 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5448 }
5449
5450 #if INCLUDE_CDS
5451 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5452
5453 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5454 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5455 }
5456 #endif
5457
5458 #if INCLUDE_CDS_JAVA_HEAP
5459 bool JavaClasses::is_supported_for_archiving(oop obj) {
5460 Klass* klass = obj->klass();
5461
5462 if (!CDSConfig::is_dumping_method_handles()) {
5463 // These are supported by CDS only when CDSConfig::is_dumping_method_handles() is enabled.
5464 if (klass == vmClasses::ResolvedMethodName_klass() ||
5465 klass == vmClasses::MemberName_klass()) {
5466 return false;
5467 }
5468 }
5469
5470 if (!AOTReferenceObjSupport::is_enabled() && klass->is_subclass_of(vmClasses::Reference_klass())) {
5471 return false;
5472 }
5473
5474 return true;
5475 }
5476 #endif
5477
5478 #ifndef PRODUCT
5479
5480 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5481
5482 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5483 const char* field_sig) {
5484 EXCEPTION_MARK;
5485 fieldDescriptor fd;
5486 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5487 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5488 InstanceKlass* ik = InstanceKlass::cast(k);
5489 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5490 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5491 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5492 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5493 return false;
5494 }
5495 if (fd.is_static()) {
5496 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5497 return false;
5498 }
5499 if (fd.offset() == deserialized_offset ) {
5500 return true;
5501 } else {
5502 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5503 klass_name, field_name, deserialized_offset, fd.offset());
5504 return false;
5505 }
5506 }
5507
5508 void JavaClasses::check_offsets() {
5509 bool valid = true;
5510
5511 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5512 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5513
5514 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5515 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5516
5517 // Boxed primitive objects (java_lang_boxing_object)
5518
5519 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
5520 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5521 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
5522 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5523 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
5524 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
5525 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
5526 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5527
5528 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5529 }
5530
5531 #endif // PRODUCT
5532
5533 int InjectedField::compute_offset() {
5534 InstanceKlass* ik = InstanceKlass::cast(klass());
5535 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5536 if (!may_be_java && !fs.field_flags().is_injected()) {
5537 // Only look at injected fields
5538 continue;
5539 }
5540 if (fs.name() == name() && fs.signature() == signature()) {
5541 return fs.offset();
5542 }
5543 }
5544 ResourceMark rm;
5545 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)" : "");
5546 #ifndef PRODUCT
5547 ik->print();
5548 tty->print_cr("all fields:");
5549 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5550 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());
5551 }
5552 #endif //PRODUCT
5553 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5554 return -1;
5555 }
5556
5557 void javaClasses_init() {
5558 JavaClasses::compute_offsets();
5559 JavaClasses::check_offsets();
5560 FilteredFieldsMap::initialize(); // must be done after computing offsets.
5561 }