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/aotReferenceObjSupport.hpp"
26 #include "cds/archiveBuilder.hpp"
27 #include "cds/archiveHeapLoader.hpp"
28 #include "cds/cdsConfig.hpp"
29 #include "cds/heapShared.hpp"
30 #include "cds/metaspaceShared.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.hpp"
59 #include "oops/klass.inline.hpp"
60 #include "oops/method.inline.hpp"
61 #include "oops/objArrayKlass.hpp"
62 #include "oops/objArrayOop.inline.hpp"
63 #include "oops/oopCast.inline.hpp"
64 #include "oops/oop.inline.hpp"
65 #include "oops/symbol.hpp"
66 #include "oops/recordComponent.hpp"
67 #include "oops/typeArrayOop.inline.hpp"
68 #include "prims/jvmtiExport.hpp"
69 #include "prims/methodHandles.hpp"
70 #include "prims/resolvedMethodTable.hpp"
71 #include "runtime/continuationEntry.inline.hpp"
72 #include "runtime/continuationJavaClasses.inline.hpp"
73 #include "runtime/fieldDescriptor.inline.hpp"
74 #include "runtime/frame.inline.hpp"
75 #include "runtime/handles.inline.hpp"
76 #include "runtime/handshake.hpp"
77 #include "runtime/init.hpp"
78 #include "runtime/interfaceSupport.inline.hpp"
79 #include "runtime/java.hpp"
80 #include "runtime/javaCalls.hpp"
81 #include "runtime/javaThread.hpp"
82 #include "runtime/jniHandles.inline.hpp"
83 #include "runtime/reflectionUtils.hpp"
84 #include "runtime/safepoint.hpp"
85 #include "runtime/safepointVerifiers.hpp"
86 #include "runtime/threadSMR.hpp"
87 #include "runtime/vframe.inline.hpp"
88 #include "runtime/vm_version.hpp"
89 #include "utilities/align.hpp"
90 #include "utilities/globalDefinitions.hpp"
91 #include "utilities/growableArray.hpp"
92 #include "utilities/preserveException.hpp"
93 #include "utilities/utf8.hpp"
94 #if INCLUDE_JVMCI
95 #include "jvmci/jvmciJavaClasses.hpp"
96 #endif
97
98 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
99 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
100
101 InjectedField JavaClasses::_injected_fields[] = {
102 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
103 };
104
105 // Register native methods of Object
106 void java_lang_Object::register_natives(TRAPS) {
107 InstanceKlass* obj = vmClasses::Object_klass();
108 Method::register_native(obj, vmSymbols::hashCode_name(),
109 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
110 Method::register_native(obj, vmSymbols::wait_name(),
111 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
112 Method::register_native(obj, vmSymbols::notify_name(),
113 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
114 Method::register_native(obj, vmSymbols::notifyAll_name(),
115 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
116 Method::register_native(obj, vmSymbols::clone_name(),
117 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
118 }
119
120 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
121 return _injected_fields[(int)id].compute_offset();
122 }
123
124 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
125 *field_count = 0;
126
127 vmSymbolID sid = vmSymbols::find_sid(class_name);
128 if (sid == vmSymbolID::NO_SID) {
129 // Only well known classes can inject fields
130 return nullptr;
131 }
132
133 int count = 0;
134 int start = -1;
135
136 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
137 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \
138 count++; \
139 if (start == -1) { \
140 start = (int)InjectedFieldID::klass##_##name##_enum; \
141 } \
142 }
143 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
144 #undef LOOKUP_INJECTED_FIELD
145
146 if (start != -1) {
147 *field_count = count;
148 return _injected_fields + start;
149 }
150 return nullptr;
151 }
152
153
154 // Helpful routine for computing field offsets at run time rather than hardcoding them
155 // Finds local fields only, including static fields. Static field offsets are from the
156 // beginning of the mirror.
157 void JavaClasses::compute_offset(int &dest_offset,
158 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
159 bool is_static) {
160 fieldDescriptor fd;
161 if (ik == nullptr) {
162 ResourceMark rm;
163 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
164 vm_exit_during_initialization("Invalid layout of well-known class");
165 }
166
167 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
168 ResourceMark rm;
169 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
170 name_symbol->as_C_string(), signature_symbol->as_C_string());
171 #ifndef PRODUCT
172 // Prints all fields and offsets
173 Log(class) lt;
174 LogStream ls(lt.error());
175 ik->print_on(&ls);
176 #endif //PRODUCT
177 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
178 }
179 dest_offset = fd.offset();
180 }
181
182 // Overloading to pass name as a string.
183 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
184 const char* name_string, Symbol* signature_symbol,
185 bool is_static) {
186 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
187 if (name == nullptr) {
188 ResourceMark rm;
189 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
190 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
191 }
192 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
193 }
194
195 // java_lang_String
196
197 int java_lang_String::_value_offset;
198 int java_lang_String::_hash_offset;
199 int java_lang_String::_hashIsZero_offset;
200 int java_lang_String::_coder_offset;
201 int java_lang_String::_flags_offset;
202
203 bool java_lang_String::_initialized;
204
205
206 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
207 uint8_t* addr = flags_addr(java_string);
208 uint8_t value = Atomic::load(addr);
209 while ((value & flag_mask) == 0) {
210 uint8_t old_value = value;
211 value |= flag_mask;
212 value = Atomic::cmpxchg(addr, old_value, value);
213 if (value == old_value) return false; // Flag bit changed from 0 to 1.
214 }
215 return true; // Flag bit is already 1.
216 }
217
218 #define STRING_FIELDS_DO(macro) \
219 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
220 macro(_hash_offset, k, "hash", int_signature, false); \
221 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
222 macro(_coder_offset, k, "coder", byte_signature, false);
223
224 void java_lang_String::compute_offsets() {
225 if (_initialized) {
226 return;
227 }
228
229 InstanceKlass* k = vmClasses::String_klass();
230 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
231 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
232
233 _initialized = true;
234 }
235
236 #if INCLUDE_CDS
237 void java_lang_String::serialize_offsets(SerializeClosure* f) {
238 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
239 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
240 f->do_bool(&_initialized);
241 }
242 #endif
243
244 class CompactStringsFixup : public FieldClosure {
245 private:
246 bool _value;
247
248 public:
249 CompactStringsFixup(bool value) : _value(value) {}
250
251 void do_field(fieldDescriptor* fd) {
252 if (fd->name() == vmSymbols::compact_strings_name()) {
253 oop mirror = fd->field_holder()->java_mirror();
254 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String");
255 assert(mirror != nullptr, "String must have mirror already");
256 mirror->bool_field_put(fd->offset(), _value);
257 }
258 }
259 };
260
261 void java_lang_String::set_compact_strings(bool value) {
262 CompactStringsFixup fix(value);
263 vmClasses::String_klass()->do_local_static_fields(&fix);
264 }
265
266 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
267 assert(_initialized, "Must be initialized");
268 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
269
270 // Create the String object first, so there's a chance that the String
271 // and the char array it points to end up in the same cache line.
272 oop obj;
273 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH);
274
275 // Create the char array. The String object must be handlized here
276 // because GC can happen as a result of the allocation attempt.
277 Handle h_obj(THREAD, obj);
278 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
279 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
280
281 // Point the String at the char array
282 obj = h_obj();
283 set_value(obj, buffer);
284 // No need to zero the offset, allocation zero'ed the entire String object
285 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
286 return h_obj;
287 }
288
289 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
290 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
291 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
292 typeArrayOop buffer = value(h_obj());
293 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
294 if (is_latin1) {
295 for (int index = 0; index < length; index++) {
296 buffer->byte_at_put(index, (jbyte)unicode[index]);
297 }
298 } else {
299 for (int index = 0; index < length; index++) {
300 buffer->char_at_put(index, unicode[index]);
301 }
302 }
303
304 #ifdef ASSERT
305 {
306 ResourceMark rm;
307 size_t utf8_len = static_cast<size_t>(length);
308 char* expected = UNICODE::as_utf8(unicode, utf8_len);
309 char* actual = as_utf8_string(h_obj());
310 if (strcmp(expected, actual) != 0) {
311 fatal("Unicode conversion failure: %s --> %s", expected, actual);
312 }
313 }
314 #endif
315
316 return h_obj;
317 }
318
319 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
320 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
321 return h_obj();
322 }
323
324 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
325 if (utf8_str == nullptr) {
326 return Handle();
327 }
328 bool has_multibyte, is_latin1;
329 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
330 if (!CompactStrings) {
331 has_multibyte = true;
332 is_latin1 = false;
333 }
334
335 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
336 if (length > 0) {
337 if (!has_multibyte) {
338 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
339 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
340 } else if (is_latin1) {
341 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
342 } else {
343 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
344 }
345 }
346
347 #ifdef ASSERT
348 // This check is too strict when the input string is not a valid UTF8.
349 // For example, it may be created with arbitrary content via jni_NewStringUTF.
350 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, strlen(utf8_str), /*version_leq_47*/false)) {
351 ResourceMark rm;
352 const char* expected = utf8_str;
353 char* actual = as_utf8_string(h_obj());
354 if (strcmp(expected, actual) != 0) {
355 fatal("String conversion failure: %s --> %s", expected, actual);
356 }
357 }
358 #endif
359
360 return h_obj;
361 }
362
363 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
364 Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
365 return h_obj();
366 }
367
368 Handle java_lang_String::create_from_symbol(const Symbol* symbol, TRAPS) {
369 const char* utf8_str = (char*)symbol->bytes();
370 int utf8_len = symbol->utf8_length();
371
372 bool has_multibyte, is_latin1;
373 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
374 if (!CompactStrings) {
375 has_multibyte = true;
376 is_latin1 = false;
377 }
378
379 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
380 if (length > 0) {
381 if (!has_multibyte) {
382 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
383 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
384 } else if (is_latin1) {
385 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
386 } else {
387 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
388 }
389 }
390
391 #ifdef ASSERT
392 // This check is too strict on older classfile versions
393 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, utf8_len, /*version_leq_47*/false))
394 {
395 ResourceMark rm;
396 const char* expected = symbol->as_utf8();
397 char* actual = as_utf8_string(h_obj());
398 if (strncmp(expected, actual, utf8_len) != 0) {
399 fatal("Symbol conversion failure: %s --> %s", expected, actual);
400 }
401 }
402 #endif
403
404 return h_obj;
405 }
406
407 // Converts a C string to a Java String based on current encoding
408 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
409 assert(str != nullptr, "bad arguments");
410
411 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
412 static to_java_string_fn_t _to_java_string_fn = nullptr;
413
414 if (_to_java_string_fn == nullptr) {
415 void *lib_handle = os::native_java_library();
416 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
417 if (_to_java_string_fn == nullptr) {
418 fatal("JNU_NewStringPlatform missing");
419 }
420 }
421
422 jstring js = nullptr;
423 {
424 JavaThread* thread = THREAD;
425 HandleMark hm(thread);
426 ThreadToNativeFromVM ttn(thread);
427 js = (_to_java_string_fn)(thread->jni_environment(), str);
428 }
429
430 Handle native_platform_string(THREAD, JNIHandles::resolve(js));
431 JNIHandles::destroy_local(js); // destroy local JNIHandle.
432 return native_platform_string;
433 }
434
435 // Converts a Java String to a native C string that can be used for
436 // native OS calls.
437 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
438 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
439 static to_platform_string_fn_t _to_platform_string_fn = nullptr;
440
441 if (_to_platform_string_fn == nullptr) {
442 void *lib_handle = os::native_java_library();
443 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
444 if (_to_platform_string_fn == nullptr) {
445 fatal("GetStringPlatformChars missing");
446 }
447 }
448
449 char *native_platform_string;
450 jstring js;
451 { JavaThread* thread = THREAD;
452 js = (jstring) JNIHandles::make_local(thread, java_string());
453 HandleMark hm(thread);
454 ThreadToNativeFromVM ttn(thread);
455 JNIEnv *env = thread->jni_environment();
456 bool is_copy;
457 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
458 assert(is_copy == JNI_TRUE, "is_copy value changed");
459 }
460
461 // Uses a store barrier and therefore needs to be in vm state
462 JNIHandles::destroy_local(js);
463
464 return native_platform_string;
465 }
466
467 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
468 ResourceMark rm(THREAD);
469 return create_from_str(java_name->as_klass_external_name(), THREAD);
470 }
471
472 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
473 jchar* result = as_unicode_string_or_null(java_string, length);
474 if (result == nullptr) {
475 THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
476 }
477 return result;
478 }
479
480 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
481 typeArrayOop value = java_lang_String::value(java_string);
482 length = java_lang_String::length(java_string, value);
483 bool is_latin1 = java_lang_String::is_latin1(java_string);
484
485 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
486 if (result != nullptr) {
487 if (!is_latin1) {
488 for (int index = 0; index < length; index++) {
489 result[index] = value->char_at(index);
490 }
491 } else {
492 for (int index = 0; index < length; index++) {
493 result[index] = ((jchar) value->byte_at(index)) & 0xff;
494 }
495 }
496 }
497 return result;
498 }
499
500 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
501 // The hash and hashIsZero fields are subject to a benign data race,
502 // making it crucial to ensure that any observable result of the
503 // calculation in this method stays correct under any possible read of
504 // these fields. Necessary restrictions to allow this to be correct
505 // without explicit memory fences or similar concurrency primitives is
506 // that we can ever only write to one of these two fields for a given
507 // String instance, and that the computation is idempotent and derived
508 // from immutable state
509 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
510 if (java_lang_String::hash_is_set(java_string)) {
511 return java_string->int_field(_hash_offset);
512 }
513
514 typeArrayOop value = java_lang_String::value(java_string);
515 int length = java_lang_String::length(java_string, value);
516 bool is_latin1 = java_lang_String::is_latin1(java_string);
517
518 unsigned int hash = 0;
519 if (length > 0) {
520 if (is_latin1) {
521 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
522 } else {
523 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
524 }
525 }
526
527 if (update) {
528 if (hash != 0) {
529 java_string->int_field_put(_hash_offset, hash);
530 } else {
531 java_string->bool_field_put(_hashIsZero_offset, true);
532 }
533 }
534 return hash;
535 }
536
537 unsigned int java_lang_String::hash_code(oop java_string) {
538 return hash_code_impl(java_string, /*update=*/true);
539 }
540
541 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
542 return hash_code_impl(java_string, /*update=*/false);
543 }
544
545
546 char* java_lang_String::as_quoted_ascii(oop java_string) {
547 typeArrayOop value = java_lang_String::value(java_string);
548 int length = java_lang_String::length(java_string, value);
549 bool is_latin1 = java_lang_String::is_latin1(java_string);
550
551 if (length == 0) return nullptr;
552
553 char* result;
554 size_t result_length;
555 if (!is_latin1) {
556 jchar* base = value->char_at_addr(0);
557 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
558 result = NEW_RESOURCE_ARRAY(char, result_length);
559 UNICODE::as_quoted_ascii(base, length, result, result_length);
560 } else {
561 jbyte* base = value->byte_at_addr(0);
562 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
563 result = NEW_RESOURCE_ARRAY(char, result_length);
564 UNICODE::as_quoted_ascii(base, length, result, result_length);
565 }
566 assert(result_length >= (size_t)length + 1, "must not be shorter");
567 assert(result_length == strlen(result) + 1, "must match");
568 return result;
569 }
570
571 Symbol* java_lang_String::as_symbol(oop java_string) {
572 typeArrayOop value = java_lang_String::value(java_string);
573 int length = java_lang_String::length(java_string, value);
574 bool is_latin1 = java_lang_String::is_latin1(java_string);
575 if (!is_latin1) {
576 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
577 Symbol* sym = SymbolTable::new_symbol(base, length);
578 return sym;
579 } else {
580 ResourceMark rm;
581 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
582 size_t utf8_len = static_cast<size_t>(length);
583 const char* base = UNICODE::as_utf8(position, utf8_len);
584 Symbol* sym = SymbolTable::new_symbol(base, checked_cast<int>(utf8_len));
585 return sym;
586 }
587 }
588
589 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
590 typeArrayOop value = java_lang_String::value(java_string);
591 int length = java_lang_String::length(java_string, value);
592 bool is_latin1 = java_lang_String::is_latin1(java_string);
593 if (!is_latin1) {
594 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
595 return SymbolTable::probe_unicode(base, length);
596 } else {
597 ResourceMark rm;
598 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
599 size_t utf8_len = static_cast<size_t>(length);
600 const char* base = UNICODE::as_utf8(position, utf8_len);
601 return SymbolTable::probe(base, checked_cast<int>(utf8_len));
602 }
603 }
604
605 size_t java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
606 assert(value_equals(value, java_lang_String::value(java_string)),
607 "value must be same as java_lang_String::value(java_string)");
608 int length = java_lang_String::length(java_string, value);
609 if (length == 0) {
610 return 0;
611 }
612 if (!java_lang_String::is_latin1(java_string)) {
613 return UNICODE::utf8_length(value->char_at_addr(0), length);
614 } else {
615 return UNICODE::utf8_length(value->byte_at_addr(0), length);
616 }
617 }
618
619 size_t java_lang_String::utf8_length(oop java_string) {
620 typeArrayOop value = java_lang_String::value(java_string);
621 return utf8_length(java_string, value);
622 }
623
624 int java_lang_String::utf8_length_as_int(oop java_string) {
625 typeArrayOop value = java_lang_String::value(java_string);
626 return utf8_length_as_int(java_string, value);
627 }
628
629 int java_lang_String::utf8_length_as_int(oop java_string, typeArrayOop value) {
630 assert(value_equals(value, java_lang_String::value(java_string)),
631 "value must be same as java_lang_String::value(java_string)");
632 int length = java_lang_String::length(java_string, value);
633 if (length == 0) {
634 return 0;
635 }
636 if (!java_lang_String::is_latin1(java_string)) {
637 return UNICODE::utf8_length_as_int(value->char_at_addr(0), length);
638 } else {
639 return UNICODE::utf8_length_as_int(value->byte_at_addr(0), length);
640 }
641 }
642
643 char* java_lang_String::as_utf8_string(oop java_string) {
644 size_t length;
645 return as_utf8_string(java_string, length);
646 }
647
648 char* java_lang_String::as_utf8_string(oop java_string, size_t& length) {
649 typeArrayOop value = java_lang_String::value(java_string);
650 // `length` is used as the incoming number of characters to
651 // convert, and then set as the number of bytes in the UTF8 sequence.
652 length = java_lang_String::length(java_string, value);
653 bool is_latin1 = java_lang_String::is_latin1(java_string);
654 if (!is_latin1) {
655 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
656 return UNICODE::as_utf8(position, length);
657 } else {
658 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
659 return UNICODE::as_utf8(position, length);
660 }
661 }
662
663 // Uses a provided buffer if it's sufficiently large, otherwise allocates
664 // a resource array to fit
665 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& utf8_len) {
666 typeArrayOop value = java_lang_String::value(java_string);
667 int len = java_lang_String::length(java_string, value);
668 bool is_latin1 = java_lang_String::is_latin1(java_string);
669 if (!is_latin1) {
670 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
671 utf8_len = UNICODE::utf8_length(position, len);
672 if (utf8_len >= buflen) {
673 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
674 }
675 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
676 } else {
677 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
678 utf8_len = UNICODE::utf8_length(position, len);
679 if (utf8_len >= buflen) {
680 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
681 }
682 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
683 }
684 }
685
686 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen) {
687 assert(value_equals(value, java_lang_String::value(java_string)),
688 "value must be same as java_lang_String::value(java_string)");
689 int length = java_lang_String::length(java_string, value);
690 bool is_latin1 = java_lang_String::is_latin1(java_string);
691 if (!is_latin1) {
692 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
693 return UNICODE::as_utf8(position, length, buf, buflen);
694 } else {
695 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
696 return UNICODE::as_utf8(position, length, buf, buflen);
697 }
698 }
699
700 char* java_lang_String::as_utf8_string(oop java_string, char* buf, size_t buflen) {
701 typeArrayOop value = java_lang_String::value(java_string);
702 return as_utf8_string(java_string, value, buf, buflen);
703 }
704
705 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
706 // `length` is used as the incoming number of characters to
707 // convert, and then set as the number of bytes in the UTF8 sequence.
708 size_t length = static_cast<size_t>(len);
709 typeArrayOop value = java_lang_String::value(java_string);
710 bool is_latin1 = java_lang_String::is_latin1(java_string);
711 assert(start + len <= java_lang_String::length(java_string), "just checking");
712 if (!is_latin1) {
713 jchar* position = value->char_at_addr(start);
714 return UNICODE::as_utf8(position, length);
715 } else {
716 jbyte* position = value->byte_at_addr(start);
717 return UNICODE::as_utf8(position, length);
718 }
719 }
720
721 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen) {
722 assert(value_equals(value, java_lang_String::value(java_string)),
723 "value must be same as java_lang_String::value(java_string)");
724 assert(start + len <= java_lang_String::length(java_string), "just checking");
725 bool is_latin1 = java_lang_String::is_latin1(java_string);
726 if (!is_latin1) {
727 jchar* position = value->char_at_addr(start);
728 return UNICODE::as_utf8(position, len, buf, buflen);
729 } else {
730 jbyte* position = value->byte_at_addr(start);
731 return UNICODE::as_utf8(position, len, buf, buflen);
732 }
733 }
734
735 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
736 assert(java_string->klass() == vmClasses::String_klass(),
737 "must be java_string");
738 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
739 int length = java_lang_String::length(java_string, value);
740 if (length != len) {
741 return false;
742 }
743 bool is_latin1 = java_lang_String::is_latin1(java_string);
744 if (!is_latin1) {
745 for (int i = 0; i < len; i++) {
746 if (value->char_at(i) != chars[i]) {
747 return false;
748 }
749 }
750 } else {
751 for (int i = 0; i < len; i++) {
752 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
753 return false;
754 }
755 }
756 }
757 return true;
758 }
759
760 bool java_lang_String::equals(oop java_string, const char* utf8_string, size_t utf8_len) {
761 assert(java_string->klass() == vmClasses::String_klass(),
762 "must be java_string");
763 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
764 int length = java_lang_String::length(java_string, value);
765 int unicode_length = UTF8::unicode_length(utf8_string, utf8_len);
766 if (length != unicode_length) {
767 return false;
768 }
769 bool is_latin1 = java_lang_String::is_latin1(java_string);
770 jchar c;
771 if (!is_latin1) {
772 for (int i = 0; i < unicode_length; i++) {
773 utf8_string = UTF8::next(utf8_string, &c);
774 if (value->char_at(i) != c) {
775 return false;
776 }
777 }
778 } else {
779 for (int i = 0; i < unicode_length; i++) {
780 utf8_string = UTF8::next(utf8_string, &c);
781 if ((((jchar) value->byte_at(i)) & 0xff) != c) {
782 return false;
783 }
784 }
785 }
786 return true;
787 }
788
789 bool java_lang_String::equals(oop str1, oop str2) {
790 assert(str1->klass() == vmClasses::String_klass(),
791 "must be java String");
792 assert(str2->klass() == vmClasses::String_klass(),
793 "must be java String");
794 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
795 bool is_latin1 = java_lang_String::is_latin1(str1);
796 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
797 bool is_latin2 = java_lang_String::is_latin1(str2);
798
799 if (is_latin1 != is_latin2) {
800 // Strings with different coders are never equal.
801 return false;
802 }
803 return value_equals(value1, value2);
804 }
805
806 // Print the given string to the given outputStream, limiting the output to
807 // at most max_length of the string's characters. If the length exceeds the
808 // limit we print an abridged version of the string with the "middle" elided
809 // and replaced by " ... (N characters ommitted) ... ". If max_length is odd
810 // it is treated as max_length-1.
811 void java_lang_String::print(oop java_string, outputStream* st, int max_length) {
812 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
813 // We need at least two characters to print A ... B
814 assert(max_length > 1, "invalid max_length: %d", max_length);
815
816 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
817
818 if (value == nullptr) {
819 // This can happen if, e.g., printing a String
820 // object before its initializer has been called
821 st->print("nullptr");
822 return;
823 }
824
825 int length = java_lang_String::length(java_string, value);
826 bool is_latin1 = java_lang_String::is_latin1(java_string);
827
828 bool abridge = length > max_length;
829
830 st->print("\"");
831 for (int index = 0; index < length; index++) {
832 // If we need to abridge and we've printed half the allowed characters
833 // then jump to the tail of the string.
834 if (abridge && index >= max_length / 2) {
835 st->print(" ... (%d characters ommitted) ... ", length - 2 * (max_length / 2));
836 index = length - (max_length / 2);
837 abridge = false; // only do this once
838 }
839 jchar c = (!is_latin1) ? value->char_at(index) :
840 ((jchar) value->byte_at(index)) & 0xff;
841 if (c < ' ') {
842 st->print("\\x%02X", c); // print control characters e.g. \x0A
843 } else {
844 st->print("%c", c);
845 }
846 }
847 st->print("\"");
848
849 if (length > max_length) {
850 st->print(" (abridged) ");
851 }
852 }
853
854 // java_lang_Class
855
856 int java_lang_Class::_klass_offset;
857 int java_lang_Class::_array_klass_offset;
858 int java_lang_Class::_oop_size_offset;
859 int java_lang_Class::_static_oop_field_count_offset;
860 int java_lang_Class::_class_loader_offset;
861 int java_lang_Class::_module_offset;
862 int java_lang_Class::_protection_domain_offset;
863 int java_lang_Class::_component_mirror_offset;
864 int java_lang_Class::_init_lock_offset;
865 int java_lang_Class::_signers_offset;
866 int java_lang_Class::_name_offset;
867 int java_lang_Class::_source_file_offset;
868 int java_lang_Class::_classData_offset;
869 int java_lang_Class::_classRedefinedCount_offset;
870 int java_lang_Class::_reflectionData_offset;
871 int java_lang_Class::_modifiers_offset;
872 int java_lang_Class::_is_primitive_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->is_shared()) {
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 }
972
973 if (k->is_shared() && k->has_archived_mirror_index()) {
974 if (ArchiveHeapLoader::is_in_use()) {
975 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
976 assert(present, "Missing archived mirror for %s", k->external_name());
977 return;
978 } else {
979 k->clear_java_mirror_handle();
980 k->clear_archived_mirror_index();
981 }
982 }
983 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
984 }
985
986 void java_lang_Class::initialize_mirror_fields(Klass* k,
987 Handle mirror,
988 Handle protection_domain,
989 Handle classData,
990 TRAPS) {
991 // Allocate a simple java object for a lock.
992 // This needs to be a java object because during class initialization
993 // it can be held across a java call.
994 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
995 set_init_lock(mirror(), r);
996
997 // Set protection domain also
998 set_protection_domain(mirror(), protection_domain());
999
1000 // Initialize static fields
1001 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
1002
1003 // Set classData
1004 set_class_data(mirror(), classData());
1005 }
1006
1007 // Set the java.lang.Module module field in the java_lang_Class mirror
1008 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
1009 if (module.is_null()) {
1010 // During startup, the module may be null only if java.base has not been defined yet.
1011 // Put the class on the fixup_module_list to patch later when the java.lang.Module
1012 // for java.base is known. But note that since we captured the null module another
1013 // thread may have completed that initialization.
1014
1015 bool javabase_was_defined = false;
1016 {
1017 MutexLocker m1(current, Module_lock);
1018 // Keep list of classes needing java.base module fixup
1019 if (!ModuleEntryTable::javabase_defined()) {
1020 assert(k->java_mirror() != nullptr, "Class's mirror is null");
1021 k->class_loader_data()->inc_keep_alive_ref_count();
1022 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
1023 fixup_module_field_list()->push(k);
1024 } else {
1025 javabase_was_defined = true;
1026 }
1027 }
1028
1029 // If java.base was already defined then patch this particular class with java.base.
1030 if (javabase_was_defined) {
1031 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
1032 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr,
1033 "Setting class module field, " JAVA_BASE_NAME " should be defined");
1034 Handle javabase_handle(current, javabase_entry->module());
1035 set_module(mirror(), javabase_handle());
1036 }
1037 } else {
1038 assert(Universe::is_module_initialized() ||
1039 (ModuleEntryTable::javabase_defined() &&
1040 (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
1041 "Incorrect java.lang.Module specification while creating mirror");
1042 set_module(mirror(), module());
1043 }
1044 }
1045
1046 // Statically allocate fixup lists because they always get created.
1047 void java_lang_Class::allocate_fixup_lists() {
1048 GrowableArray<Klass*>* mirror_list =
1049 new (mtClass) GrowableArray<Klass*>(40, mtClass);
1050 set_fixup_mirror_list(mirror_list);
1051
1052 GrowableArray<Klass*>* module_list =
1053 new (mtModule) GrowableArray<Klass*>(500, mtModule);
1054 set_fixup_module_field_list(module_list);
1055 }
1056
1057 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
1058 Handle& mirror, Handle& comp_mirror, TRAPS) {
1059 // Allocate mirror (java.lang.Class instance)
1060 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, is_scratch, CHECK);
1061 mirror = Handle(THREAD, mirror_oop);
1062
1063 // Setup indirection from mirror->klass
1064 set_klass(mirror(), k);
1065
1066 // Set the modifiers flag.
1067 u2 computed_modifiers = k->compute_modifier_flags();
1068 set_modifiers(mirror(), computed_modifiers);
1069
1070 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
1071 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
1072
1073 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
1074
1075 // It might also have a component mirror. This mirror must already exist.
1076 if (k->is_array_klass()) {
1077 if (k->is_typeArray_klass()) {
1078 BasicType type = TypeArrayKlass::cast(k)->element_type();
1079 if (is_scratch) {
1080 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
1081 } else {
1082 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
1083 }
1084 } else {
1085 assert(k->is_objArray_klass(), "Must be");
1086 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1087 assert(element_klass != nullptr, "Must have an element klass");
1088 if (is_scratch) {
1089 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1090 } else {
1091 comp_mirror = Handle(THREAD, element_klass->java_mirror());
1092 }
1093 }
1094 assert(comp_mirror() != nullptr, "must have a mirror");
1095
1096 // Two-way link between the array klass and its component mirror:
1097 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1098 set_component_mirror(mirror(), comp_mirror());
1099 // See below for ordering dependencies between field array_klass in component mirror
1100 // and java_mirror in this klass.
1101 } else {
1102 assert(k->is_instance_klass(), "Must be");
1103
1104 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD);
1105 if (HAS_PENDING_EXCEPTION) {
1106 // If any of the fields throws an exception like OOM remove the klass field
1107 // from the mirror so GC doesn't follow it after the klass has been deallocated.
1108 // This mirror looks like a primitive type, which logically it is because it
1109 // it represents no class.
1110 set_klass(mirror(), nullptr);
1111 return;
1112 }
1113 }
1114 }
1115
1116 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1117 Handle module, Handle protection_domain,
1118 Handle classData, TRAPS) {
1119 assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1120 assert(k->java_mirror() == nullptr, "should only assign mirror once");
1121
1122 // Class_klass has to be loaded because it is used to allocate
1123 // the mirror.
1124 if (vmClasses::Class_klass_loaded()) {
1125 Handle mirror;
1126 Handle comp_mirror;
1127
1128 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1129
1130 // set the classLoader field in the java_lang_Class instance
1131 assert(class_loader() == k->class_loader(), "should be same");
1132 set_class_loader(mirror(), class_loader());
1133
1134 // Setup indirection from klass->mirror
1135 // after any exceptions can happen during allocations.
1136 k->set_java_mirror(mirror);
1137
1138 // Set the module field in the java_lang_Class instance. This must be done
1139 // after the mirror is set.
1140 set_mirror_module_field(THREAD, k, mirror, module);
1141
1142 if (comp_mirror() != nullptr) {
1143 // Set after k->java_mirror() is published, because compiled code running
1144 // concurrently doesn't expect a k to have a null java_mirror.
1145 release_set_array_klass(comp_mirror(), k);
1146 }
1147 if (CDSConfig::is_dumping_heap()) {
1148 create_scratch_mirror(k, CHECK);
1149 }
1150 } else {
1151 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1152 fixup_mirror_list()->push(k);
1153 }
1154 }
1155
1156 #if INCLUDE_CDS_JAVA_HEAP
1157 // The "scratch mirror" stores the states of the mirror object that can be
1158 // decided at dump time (such as the initial values of the static fields, the
1159 // component mirror, etc). At runtime, more information is added to it by
1160 // java_lang_Class::restore_archived_mirror().
1161 //
1162 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1163 // produces the same result as /*runtime*/create_mirror().
1164 //
1165 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1166 // latter may contain dumptime-specific information that cannot be archived
1167 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1168 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1169 if (k->class_loader() != nullptr &&
1170 k->class_loader() != SystemDictionary::java_platform_loader() &&
1171 k->class_loader() != SystemDictionary::java_system_loader()) {
1172 // We only archive the mirrors of classes loaded by the built-in loaders
1173 return;
1174 }
1175
1176 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1177 Handle mirror;
1178 Handle comp_mirror;
1179 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1180
1181 if (comp_mirror() != nullptr) {
1182 release_set_array_klass(comp_mirror(), k);
1183 }
1184
1185 HeapShared::set_scratch_java_mirror(k, mirror());
1186 }
1187
1188 // Returns true if the mirror is updated, false if no archived mirror
1189 // data is present. After the archived mirror object is restored, the
1190 // shared klass' _has_raw_archived_mirror flag is cleared.
1191 bool java_lang_Class::restore_archived_mirror(Klass *k,
1192 Handle class_loader, Handle module,
1193 Handle protection_domain, TRAPS) {
1194 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1195 // see more details in vmClasses::resolve_all().
1196 if (!vmClasses::Class_klass_loaded()) {
1197 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1198 fixup_mirror_list()->push(k);
1199 return true;
1200 }
1201
1202 oop m = k->archived_java_mirror();
1203 assert(m != nullptr, "must have stored non-null archived mirror");
1204
1205 // Sanity: clear it now to prevent re-initialization if any of the following fails
1206 k->clear_archived_mirror_index();
1207
1208 // mirror is archived, restore
1209 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1210 assert(as_Klass(m) == k, "must be");
1211 Handle mirror(THREAD, m);
1212
1213 if (!k->is_array_klass()) {
1214 // - local static final fields with initial values were initialized at dump time
1215
1216 // create the init_lock
1217 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1218 set_init_lock(mirror(), r);
1219
1220 if (protection_domain.not_null()) {
1221 set_protection_domain(mirror(), protection_domain());
1222 }
1223 }
1224
1225 assert(class_loader() == k->class_loader(), "should be same");
1226 if (class_loader.not_null()) {
1227 set_class_loader(mirror(), class_loader());
1228 }
1229
1230 k->set_java_mirror(mirror);
1231
1232 set_mirror_module_field(THREAD, k, mirror, module);
1233
1234 if (log_is_enabled(Trace, cds, heap, mirror)) {
1235 ResourceMark rm(THREAD);
1236 log_trace(cds, heap, mirror)(
1237 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1238 }
1239
1240 return true;
1241 }
1242 #endif // INCLUDE_CDS_JAVA_HEAP
1243
1244 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1245 assert(_module_offset != 0, "must have been computed already");
1246 set_module(k->java_mirror(), module());
1247 }
1248
1249 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1250 assert(_oop_size_offset != 0, "must be set");
1251 assert(size > 0, "Oop size must be greater than zero, not %zu", size);
1252 assert(size <= INT_MAX, "Lossy conversion: %zu", size);
1253 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1254 }
1255
1256 int java_lang_Class::static_oop_field_count(oop java_class) {
1257 assert(_static_oop_field_count_offset != 0, "must be set");
1258 return java_class->int_field(_static_oop_field_count_offset);
1259 }
1260
1261 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1262 assert(_static_oop_field_count_offset != 0, "must be set");
1263 java_class->int_field_put(_static_oop_field_count_offset, size);
1264 }
1265
1266 oop java_lang_Class::protection_domain(oop java_class) {
1267 assert(_protection_domain_offset != 0, "must be set");
1268 return java_class->obj_field(_protection_domain_offset);
1269 }
1270 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1271 assert(_protection_domain_offset != 0, "must be set");
1272 java_class->obj_field_put(_protection_domain_offset, pd);
1273 }
1274
1275 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1276 assert(_component_mirror_offset != 0, "must be set");
1277 assert(java_lang_Class::as_Klass(java_class) != nullptr &&
1278 java_lang_Class::as_Klass(java_class)->is_array_klass(), "must be");
1279 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1280 }
1281
1282 oop java_lang_Class::component_mirror(oop java_class) {
1283 assert(_component_mirror_offset != 0, "must be set");
1284 return java_class->obj_field(_component_mirror_offset);
1285 }
1286
1287 oop java_lang_Class::init_lock(oop java_class) {
1288 assert(_init_lock_offset != 0, "must be set");
1289 return java_class->obj_field(_init_lock_offset);
1290 }
1291 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1292 assert(_init_lock_offset != 0, "must be set");
1293 java_class->obj_field_put(_init_lock_offset, init_lock);
1294 }
1295
1296 objArrayOop java_lang_Class::signers(oop java_class) {
1297 assert(_signers_offset != 0, "must be set");
1298 return (objArrayOop)java_class->obj_field(_signers_offset);
1299 }
1300
1301 oop java_lang_Class::class_data(oop java_class) {
1302 assert(_classData_offset != 0, "must be set");
1303 return java_class->obj_field(_classData_offset);
1304 }
1305 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1306 assert(_classData_offset != 0, "must be set");
1307 java_class->obj_field_put(_classData_offset, class_data);
1308 }
1309
1310 void java_lang_Class::set_reflection_data(oop java_class, oop reflection_data) {
1311 assert(_reflectionData_offset != 0, "must be set");
1312 java_class->obj_field_put(_reflectionData_offset, reflection_data);
1313 }
1314
1315 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1316 assert(_class_loader_offset != 0, "offsets should have been initialized");
1317 java_class->obj_field_put(_class_loader_offset, loader);
1318 }
1319
1320 oop java_lang_Class::class_loader(oop java_class) {
1321 assert(_class_loader_offset != 0, "must be set");
1322 return java_class->obj_field(_class_loader_offset);
1323 }
1324
1325 oop java_lang_Class::module(oop java_class) {
1326 assert(_module_offset != 0, "must be set");
1327 return java_class->obj_field(_module_offset);
1328 }
1329
1330 void java_lang_Class::set_module(oop java_class, oop module) {
1331 assert(_module_offset != 0, "must be set");
1332 java_class->obj_field_put(_module_offset, module);
1333 }
1334
1335 oop java_lang_Class::name(Handle java_class, TRAPS) {
1336 assert(_name_offset != 0, "must be set");
1337 oop o = java_class->obj_field(_name_offset);
1338 if (o == nullptr) {
1339 o = StringTable::intern(as_external_name(java_class()), THREAD);
1340 java_class->obj_field_put(_name_offset, o);
1341 }
1342 return o;
1343 }
1344
1345 oop java_lang_Class::source_file(oop java_class) {
1346 assert(_source_file_offset != 0, "must be set");
1347 return java_class->obj_field(_source_file_offset);
1348 }
1349
1350 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1351 assert(_source_file_offset != 0, "must be set");
1352 java_class->obj_field_put(_source_file_offset, source_file);
1353 }
1354
1355 void java_lang_Class::set_is_primitive(oop java_class) {
1356 assert(_is_primitive_offset != 0, "must be set");
1357 java_class->bool_field_put(_is_primitive_offset, true);
1358 }
1359
1360
1361 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, bool is_scratch, TRAPS) {
1362 // Mirrors for basic types have a null klass field, which makes them special.
1363 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, is_scratch, CHECK_NULL);
1364 if (type != T_VOID) {
1365 Klass* aklass = Universe::typeArrayKlass(type);
1366 assert(aklass != nullptr, "correct bootstrap");
1367 release_set_array_klass(java_class, aklass);
1368 }
1369 #ifdef ASSERT
1370 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1371 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1372 #endif
1373 set_modifiers(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
1374 set_is_primitive(java_class);
1375 return java_class;
1376 }
1377
1378 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1379 assert(is_instance(java_class), "must be a Class object");
1380 java_class->metadata_field_put(_klass_offset, klass);
1381 }
1382
1383
1384 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1385 assert(is_instance(java_class), "must be a Class object");
1386 Symbol* name = nullptr;
1387 bool is_instance = false;
1388 if (is_primitive(java_class)) {
1389 name = vmSymbols::type_signature(primitive_type(java_class));
1390 } else {
1391 Klass* k = as_Klass(java_class);
1392 is_instance = k->is_instance_klass();
1393 name = k->name();
1394 }
1395 if (name == nullptr) {
1396 st->print("<null>");
1397 return;
1398 }
1399 if (is_instance) st->print("L");
1400 st->write((char*) name->base(), (int) name->utf8_length());
1401 if (is_instance) st->print(";");
1402 }
1403
1404 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1405 assert(is_instance(java_class), "must be a Class object");
1406 Symbol* name;
1407 if (is_primitive(java_class)) {
1408 name = vmSymbols::type_signature(primitive_type(java_class));
1409 // Because this can create a new symbol, the caller has to decrement
1410 // the refcount, so make adjustment here and below for symbols returned
1411 // that are not created or incremented due to a successful lookup.
1412 name->increment_refcount();
1413 } else {
1414 Klass* k = as_Klass(java_class);
1415 if (!k->is_instance_klass()) {
1416 name = k->name();
1417 name->increment_refcount();
1418 } else {
1419 ResourceMark rm;
1420 const char* sigstr = k->signature_name();
1421 int siglen = (int) strlen(sigstr);
1422 if (!intern_if_not_found) {
1423 name = SymbolTable::probe(sigstr, siglen);
1424 } else {
1425 name = SymbolTable::new_symbol(sigstr, siglen);
1426 }
1427 }
1428 }
1429 return name;
1430 }
1431
1432 // Returns the Java name for this Java mirror (Resource allocated)
1433 // See Klass::external_name().
1434 // For primitive type Java mirrors, its type name is returned.
1435 const char* java_lang_Class::as_external_name(oop java_class) {
1436 assert(is_instance(java_class), "must be a Class object");
1437 const char* name = nullptr;
1438 if (is_primitive(java_class)) {
1439 name = type2name(primitive_type(java_class));
1440 } else {
1441 name = as_Klass(java_class)->external_name();
1442 }
1443 if (name == nullptr) {
1444 name = "<null>";
1445 }
1446 return name;
1447 }
1448
1449 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1450 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1451 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass");
1452 return k;
1453 }
1454
1455
1456 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1457 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1458 java_class->release_metadata_field_put(_array_klass_offset, klass);
1459 }
1460
1461
1462 BasicType java_lang_Class::primitive_type(oop java_class) {
1463 assert(is_primitive(java_class), "just checking");
1464 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1465 BasicType type = T_VOID;
1466 if (ak != nullptr) {
1467 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1468 type = ArrayKlass::cast(ak)->element_type();
1469 } else {
1470 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1471 }
1472 #ifdef ASSERT
1473 if (CDSConfig::is_dumping_heap()) {
1474 oop mirror = Universe::java_mirror(type);
1475 oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1476 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1477 } else {
1478 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1479 }
1480 #endif
1481 return type;
1482 }
1483
1484 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1485 assert(is_instance(java_class), "must be a Class object");
1486 if (is_primitive(java_class)) {
1487 if (reference_klass != nullptr)
1488 (*reference_klass) = nullptr;
1489 return primitive_type(java_class);
1490 } else {
1491 if (reference_klass != nullptr)
1492 (*reference_klass) = as_Klass(java_class);
1493 return T_OBJECT;
1494 }
1495 }
1496
1497
1498 oop java_lang_Class::primitive_mirror(BasicType t) {
1499 oop mirror = Universe::java_mirror(t);
1500 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1501 assert(is_primitive(mirror), "must be primitive");
1502 return mirror;
1503 }
1504
1505 #define CLASS_FIELDS_DO(macro) \
1506 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1507 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1508 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1509 macro(_module_offset, k, "module", module_signature, false); \
1510 macro(_name_offset, k, "name", string_signature, false); \
1511 macro(_classData_offset, k, "classData", object_signature, false); \
1512 macro(_reflectionData_offset, k, "reflectionData", java_lang_ref_SoftReference_signature, false); \
1513 macro(_signers_offset, k, "signers", object_array_signature, false); \
1514 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), char_signature, false); \
1515 macro(_protection_domain_offset, k, "protectionDomain", java_security_ProtectionDomain_signature, false); \
1516 macro(_is_primitive_offset, k, "primitive", bool_signature, false);
1517
1518 void java_lang_Class::compute_offsets() {
1519 if (_offsets_computed) {
1520 return;
1521 }
1522
1523 _offsets_computed = true;
1524
1525 InstanceKlass* k = vmClasses::Class_klass();
1526 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1527 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1528 }
1529
1530 #if INCLUDE_CDS
1531 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1532 f->do_bool(&_offsets_computed);
1533
1534 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1535
1536 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1537 }
1538 #endif
1539
1540 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1541 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1542 return the_class_mirror->int_field(_classRedefinedCount_offset);
1543 }
1544
1545 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1546 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1547 the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1548 }
1549
1550 int java_lang_Class::modifiers(oop the_class_mirror) {
1551 assert(_modifiers_offset != 0, "offsets should have been initialized");
1552 return the_class_mirror->char_field(_modifiers_offset);
1553 }
1554
1555 void java_lang_Class::set_modifiers(oop the_class_mirror, u2 value) {
1556 assert(_modifiers_offset != 0, "offsets should have been initialized");
1557 the_class_mirror->char_field_put(_modifiers_offset, value);
1558 }
1559
1560
1561 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1562 // platform thread structure, and a eetop offset which was used for thread
1563 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1564 // merged, so in the HotSpot VM we just use the eetop field for the thread
1565 // instead of the privateInfo_offset.
1566 //
1567 // Note: The stackSize field is only present starting in 1.4.
1568
1569 int java_lang_Thread_FieldHolder::_group_offset;
1570 int java_lang_Thread_FieldHolder::_priority_offset;
1571 int java_lang_Thread_FieldHolder::_stackSize_offset;
1572 int java_lang_Thread_FieldHolder::_daemon_offset;
1573 int java_lang_Thread_FieldHolder::_thread_status_offset;
1574
1575 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1576 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1577 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1578 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1579 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1580 macro(_thread_status_offset, k, "threadStatus", int_signature, false)
1581
1582 void java_lang_Thread_FieldHolder::compute_offsets() {
1583 assert(_group_offset == 0, "offsets should be initialized only once");
1584
1585 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1586 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1587 }
1588
1589 #if INCLUDE_CDS
1590 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1591 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1592 }
1593 #endif
1594
1595 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1596 return holder->obj_field(_group_offset);
1597 }
1598
1599 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1600 return (ThreadPriority)holder->int_field(_priority_offset);
1601 }
1602
1603 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1604 holder->int_field_put(_priority_offset, priority);
1605 }
1606
1607 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1608 return holder->long_field(_stackSize_offset);
1609 }
1610
1611 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1612 return holder->bool_field(_daemon_offset) != 0;
1613 }
1614
1615 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1616 assert(val, "daemon status is never turned off");
1617 holder->bool_field_put(_daemon_offset, val);
1618 }
1619
1620 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1621 holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1622 }
1623
1624 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1625 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1626 }
1627
1628
1629 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1630
1631 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1632 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true);
1633
1634 void java_lang_Thread_Constants::compute_offsets() {
1635 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1636
1637 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1638 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1639 }
1640
1641 #if INCLUDE_CDS
1642 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1643 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1644 }
1645 #endif
1646
1647 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1648 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1649 oop base = k->static_field_base_raw();
1650 return base->obj_field(_static_VTHREAD_GROUP_offset);
1651 }
1652
1653
1654 int java_lang_Thread::_holder_offset;
1655 int java_lang_Thread::_name_offset;
1656 int java_lang_Thread::_contextClassLoader_offset;
1657 int java_lang_Thread::_eetop_offset;
1658 int java_lang_Thread::_jvmti_thread_state_offset;
1659 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1660 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1661 int java_lang_Thread::_interrupted_offset;
1662 int java_lang_Thread::_interruptLock_offset;
1663 int java_lang_Thread::_tid_offset;
1664 int java_lang_Thread::_continuation_offset;
1665 int java_lang_Thread::_park_blocker_offset;
1666 int java_lang_Thread::_scopedValueBindings_offset;
1667 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1668
1669 #define THREAD_FIELDS_DO(macro) \
1670 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \
1671 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1672 macro(_contextClassLoader_offset, k, "contextClassLoader", classloader_signature, false); \
1673 macro(_eetop_offset, k, "eetop", long_signature, false); \
1674 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1675 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \
1676 macro(_tid_offset, k, "tid", long_signature, false); \
1677 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1678 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1679 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1680
1681 void java_lang_Thread::compute_offsets() {
1682 assert(_holder_offset == 0, "offsets should be initialized only once");
1683
1684 InstanceKlass* k = vmClasses::Thread_klass();
1685 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1686 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1687 }
1688
1689 #if INCLUDE_CDS
1690 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1691 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1692 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1693 }
1694 #endif
1695
1696 JavaThread* java_lang_Thread::thread(oop java_thread) {
1697 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1698 }
1699
1700 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1701 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1702 }
1703
1704 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1705 java_thread->address_field_put(_eetop_offset, (address)thread);
1706 }
1707
1708 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1709 java_thread->release_address_field_put(_eetop_offset, (address)thread);
1710 }
1711
1712 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1713 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1714 }
1715
1716 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1717 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1718 }
1719
1720 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1721 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1722 }
1723
1724 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1725 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1726 int val = VTMS_transition_disable_count(java_thread);
1727 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1728 }
1729
1730 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1731 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1732 int val = VTMS_transition_disable_count(java_thread);
1733 assert(val > 0, "VTMS_transition_disable_count should never be negative");
1734 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1735 }
1736
1737 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1738 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1739 }
1740
1741 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1742 assert(is_in_VTMS_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside");
1743 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1744 }
1745
1746 int java_lang_Thread::is_in_VTMS_transition_offset() {
1747 return _jvmti_is_in_VTMS_transition_offset;
1748 }
1749
1750 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1751 assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1752 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1753 }
1754
1755 oop java_lang_Thread::holder(oop java_thread) {
1756 // Note: may return null if the thread is still attaching
1757 return java_thread->obj_field(_holder_offset);
1758 }
1759 oop java_lang_Thread::interrupt_lock(oop java_thread) {
1760 return java_thread->obj_field(_interruptLock_offset);
1761 }
1762
1763 bool java_lang_Thread::interrupted(oop java_thread) {
1764 // Make sure the caller can safely access oops.
1765 assert(Thread::current()->is_VM_thread() ||
1766 (JavaThread::current()->thread_state() != _thread_blocked &&
1767 JavaThread::current()->thread_state() != _thread_in_native),
1768 "Unsafe access to oop");
1769 return java_thread->bool_field_volatile(_interrupted_offset);
1770 }
1771
1772 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1773 // Make sure the caller can safely access oops.
1774 assert(Thread::current()->is_VM_thread() ||
1775 (JavaThread::current()->thread_state() != _thread_blocked &&
1776 JavaThread::current()->thread_state() != _thread_in_native),
1777 "Unsafe access to oop");
1778 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1779 }
1780
1781
1782 oop java_lang_Thread::name(oop java_thread) {
1783 return java_thread->obj_field(_name_offset);
1784 }
1785
1786
1787 void java_lang_Thread::set_name(oop java_thread, oop name) {
1788 java_thread->obj_field_put(_name_offset, name);
1789 }
1790
1791 // Convenience macros for setting and getting Thread fields that
1792 // are actually stored in the FieldHolder object of the thread.
1793 // The FieldHolder can be null whilst a thread is attaching via
1794 // JNI, and when the main thread is attaching.
1795
1796 // The default value should be the default/zero initialized value
1797 // of the field as it would be in java.lang.Thread.FieldHolder.
1798 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \
1799 { \
1800 oop holder = java_lang_Thread::holder(java_thread); \
1801 if (holder != nullptr) \
1802 return java_lang_Thread_FieldHolder::field(holder); \
1803 else \
1804 return default_val; \
1805 }
1806
1807 // We should never be trying to set a field of an attaching thread.
1808 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \
1809 { \
1810 oop holder = java_lang_Thread::holder(java_thread); \
1811 assert(holder != nullptr, "Thread not fully initialized"); \
1812 java_lang_Thread_FieldHolder::set_##field(holder, value); \
1813 }
1814
1815
1816 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1817 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1818 }
1819
1820
1821 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1822 SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1823 }
1824
1825
1826 oop java_lang_Thread::threadGroup(oop java_thread) {
1827 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1828 }
1829
1830
1831 bool java_lang_Thread::is_alive(oop java_thread) {
1832 JavaThread* thr = java_lang_Thread::thread(java_thread);
1833 return (thr != nullptr);
1834 }
1835
1836
1837 bool java_lang_Thread::is_daemon(oop java_thread) {
1838 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1839 }
1840
1841
1842 void java_lang_Thread::set_daemon(oop java_thread) {
1843 SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1844 }
1845
1846 oop java_lang_Thread::context_class_loader(oop java_thread) {
1847 return java_thread->obj_field(_contextClassLoader_offset);
1848 }
1849
1850
1851 jlong java_lang_Thread::stackSize(oop java_thread) {
1852 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1853 }
1854
1855 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1856 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1857 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1858 }
1859
1860 // Read thread status value from threadStatus field in java.lang.Thread java class.
1861 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1862 // Make sure the caller is operating on behalf of the VM or is
1863 // running VM code (state == _thread_in_vm).
1864 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1865 JavaThread::current()->thread_state() == _thread_in_vm,
1866 "Java Thread is not running in vm");
1867 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1868 }
1869
1870 ByteSize java_lang_Thread::thread_id_offset() {
1871 return in_ByteSize(_tid_offset);
1872 }
1873
1874 oop java_lang_Thread::park_blocker(oop java_thread) {
1875 return java_thread->obj_field(_park_blocker_offset);
1876 }
1877
1878 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) {
1879 ThreadsListHandle tlh(JavaThread::current());
1880 JavaThread* thread;
1881 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread);
1882 if (is_virtual) {
1883 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread);
1884 if (carrier_thread == nullptr) {
1885 return nullptr;
1886 }
1887 thread = java_lang_Thread::thread(carrier_thread);
1888 } else {
1889 thread = java_lang_Thread::thread(java_thread);
1890 }
1891 if (thread == nullptr) {
1892 return nullptr;
1893 }
1894
1895 class GetStackTraceClosure : public HandshakeClosure {
1896 public:
1897 const Handle _java_thread;
1898 int _depth;
1899 bool _retry_handshake;
1900 GrowableArray<Method*>* _methods;
1901 GrowableArray<int>* _bcis;
1902
1903 GetStackTraceClosure(Handle java_thread) :
1904 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false),
1905 _methods(nullptr), _bcis(nullptr) {
1906 }
1907 ~GetStackTraceClosure() {
1908 delete _methods;
1909 delete _bcis;
1910 }
1911
1912 bool read_reset_retry() {
1913 bool ret = _retry_handshake;
1914 // If we re-execute the handshake this method need to return false
1915 // when the handshake cannot be performed. (E.g. thread terminating)
1916 _retry_handshake = false;
1917 return ret;
1918 }
1919
1920 void do_thread(Thread* th) {
1921 if (!Thread::current()->is_Java_thread()) {
1922 _retry_handshake = true;
1923 return;
1924 }
1925
1926 JavaThread* thread = JavaThread::cast(th);
1927
1928 if (!thread->has_last_Java_frame()) {
1929 return;
1930 }
1931
1932 bool carrier = false;
1933 if (java_lang_VirtualThread::is_instance(_java_thread())) {
1934 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
1935 const ContinuationEntry* ce = thread->vthread_continuation();
1936 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) {
1937 return; // not mounted
1938 }
1939 } else {
1940 carrier = (thread->vthread_continuation() != nullptr);
1941 }
1942
1943 const int max_depth = MaxJavaStackTraceDepth;
1944 const bool skip_hidden = !ShowHiddenFrames;
1945
1946 // Pick minimum length that will cover most cases
1947 int init_length = 64;
1948 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1949 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
1950
1951 int total_count = 0;
1952 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops
1953 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
1954 vfst.next()) {
1955
1956 if (skip_hidden && (vfst.method()->is_hidden() ||
1957 vfst.method()->is_continuation_enter_intrinsic())) {
1958 continue;
1959 }
1960
1961 _methods->push(vfst.method());
1962 _bcis->push(vfst.bci());
1963 total_count++;
1964 }
1965
1966 _depth = total_count;
1967 }
1968 };
1969
1970 // Handshake with target
1971 ResourceMark rm(THREAD);
1972 HandleMark hm(THREAD);
1973 GetStackTraceClosure gstc(Handle(THREAD, java_thread));
1974 do {
1975 Handshake::execute(&gstc, &tlh, thread);
1976 } while (gstc.read_reset_retry());
1977
1978 // Stop if no stack trace is found.
1979 if (gstc._depth == 0) {
1980 return nullptr;
1981 }
1982
1983 // Convert to StackTraceElement array
1984 InstanceKlass* k = vmClasses::StackTraceElement_klass();
1985 assert(k != nullptr, "must be loaded in 1.4+");
1986 if (k->should_be_initialized()) {
1987 k->initialize(CHECK_NULL);
1988 }
1989 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL);
1990
1991 for (int i = 0; i < gstc._depth; i++) {
1992 methodHandle method(THREAD, gstc._methods->at(i));
1993 oop element = java_lang_StackTraceElement::create(method,
1994 gstc._bcis->at(i),
1995 CHECK_NULL);
1996 trace->obj_at_put(i, element);
1997 }
1998
1999 return trace();
2000 }
2001
2002 const char* java_lang_Thread::thread_status_name(oop java_thread) {
2003 JavaThreadStatus status = get_thread_status(java_thread);
2004 switch (status) {
2005 case JavaThreadStatus::NEW : return "NEW";
2006 case JavaThreadStatus::RUNNABLE : return "RUNNABLE";
2007 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)";
2008 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)";
2009 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
2010 case JavaThreadStatus::PARKED : return "WAITING (parking)";
2011 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)";
2012 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
2013 case JavaThreadStatus::TERMINATED : return "TERMINATED";
2014 default : return "UNKNOWN";
2015 };
2016 }
2017 int java_lang_ThreadGroup::_parent_offset;
2018 int java_lang_ThreadGroup::_name_offset;
2019 int java_lang_ThreadGroup::_maxPriority_offset;
2020 int java_lang_ThreadGroup::_daemon_offset;
2021
2022 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
2023 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2024 return java_thread_group->obj_field(_parent_offset);
2025 }
2026
2027 // ("name as oop" accessor is not necessary)
2028
2029 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
2030 oop name = java_thread_group->obj_field(_name_offset);
2031 // ThreadGroup.name can be null
2032 if (name != nullptr) {
2033 return java_lang_String::as_utf8_string(name);
2034 }
2035 return nullptr;
2036 }
2037
2038 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
2039 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2040 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
2041 }
2042
2043 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
2044 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2045 return java_thread_group->bool_field(_daemon_offset) != 0;
2046 }
2047
2048 #define THREADGROUP_FIELDS_DO(macro) \
2049 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
2050 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
2051 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
2052 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false);
2053
2054 void java_lang_ThreadGroup::compute_offsets() {
2055 assert(_parent_offset == 0, "offsets should be initialized only once");
2056
2057 InstanceKlass* k = vmClasses::ThreadGroup_klass();
2058 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2059 }
2060
2061 #if INCLUDE_CDS
2062 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
2063 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2064 }
2065 #endif
2066
2067
2068 // java_lang_VirtualThread
2069
2070 int java_lang_VirtualThread::static_vthread_scope_offset;
2071 int java_lang_VirtualThread::_carrierThread_offset;
2072 int java_lang_VirtualThread::_continuation_offset;
2073 int java_lang_VirtualThread::_state_offset;
2074 int java_lang_VirtualThread::_next_offset;
2075 int java_lang_VirtualThread::_onWaitingList_offset;
2076 int java_lang_VirtualThread::_notified_offset;
2077 int java_lang_VirtualThread::_timeout_offset;
2078 int java_lang_VirtualThread::_objectWaiter_offset;
2079
2080 #define VTHREAD_FIELDS_DO(macro) \
2081 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \
2082 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \
2083 macro(_continuation_offset, k, "cont", continuation_signature, false); \
2084 macro(_state_offset, k, "state", int_signature, false); \
2085 macro(_next_offset, k, "next", vthread_signature, false); \
2086 macro(_onWaitingList_offset, k, "onWaitingList", bool_signature, false); \
2087 macro(_notified_offset, k, "notified", bool_signature, false); \
2088 macro(_timeout_offset, k, "timeout", long_signature, false);
2089
2090
2091 void java_lang_VirtualThread::compute_offsets() {
2092 InstanceKlass* k = vmClasses::VirtualThread_klass();
2093 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2094 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2095 }
2096
2097 bool java_lang_VirtualThread::is_instance(oop obj) {
2098 return obj != nullptr && is_subclass(obj->klass());
2099 }
2100
2101 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
2102 oop thread = vthread->obj_field(_carrierThread_offset);
2103 return thread;
2104 }
2105
2106 oop java_lang_VirtualThread::continuation(oop vthread) {
2107 oop cont = vthread->obj_field(_continuation_offset);
2108 return cont;
2109 }
2110
2111 int java_lang_VirtualThread::state(oop vthread) {
2112 return vthread->int_field_acquire(_state_offset);
2113 }
2114
2115 void java_lang_VirtualThread::set_state(oop vthread, int state) {
2116 vthread->release_int_field_put(_state_offset, state);
2117 }
2118
2119 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) {
2120 jint* addr = vthread->field_addr<jint>(_state_offset);
2121 int res = Atomic::cmpxchg(addr, old_state, new_state);
2122 return res;
2123 }
2124
2125 oop java_lang_VirtualThread::next(oop vthread) {
2126 return vthread->obj_field(_next_offset);
2127 }
2128
2129 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) {
2130 vthread->obj_field_put(_next_offset, next_vthread);
2131 }
2132
2133 // Add vthread to the waiting list if it's not already in it. Multiple threads
2134 // could be trying to add vthread to the list at the same time, so we control
2135 // access with a cmpxchg on onWaitingList. The winner adds vthread to the list.
2136 // Method returns true if we added vthread to the list, false otherwise.
2137 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) {
2138 jboolean* addr = vthread->field_addr<jboolean>(_onWaitingList_offset);
2139 jboolean vthread_on_list = Atomic::load(addr);
2140 if (!vthread_on_list) {
2141 vthread_on_list = Atomic::cmpxchg(addr, (jboolean)JNI_FALSE, (jboolean)JNI_TRUE);
2142 if (!vthread_on_list) {
2143 for (;;) {
2144 oop head = list_head.resolve();
2145 java_lang_VirtualThread::set_next(vthread, head);
2146 if (list_head.cmpxchg(head, vthread) == head) return true;
2147 }
2148 }
2149 }
2150 return false; // already on waiting list
2151 }
2152
2153 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) {
2154 vthread->bool_field_put_volatile(_notified_offset, value);
2155 }
2156
2157 jlong java_lang_VirtualThread::timeout(oop vthread) {
2158 return vthread->long_field(_timeout_offset);
2159 }
2160
2161 void java_lang_VirtualThread::set_timeout(oop vthread, jlong value) {
2162 vthread->long_field_put(_timeout_offset, value);
2163 }
2164
2165 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2166 JavaThreadStatus status = JavaThreadStatus::NEW;
2167 switch (state & ~SUSPENDED) {
2168 case NEW:
2169 status = JavaThreadStatus::NEW;
2170 break;
2171 case STARTED:
2172 case RUNNING:
2173 case PARKING:
2174 case TIMED_PARKING:
2175 case UNPARKED:
2176 case YIELDING:
2177 case YIELDED:
2178 case UNBLOCKED:
2179 case WAITING:
2180 case TIMED_WAITING:
2181 status = JavaThreadStatus::RUNNABLE;
2182 break;
2183 case PARKED:
2184 case PINNED:
2185 status = JavaThreadStatus::PARKED;
2186 break;
2187 case TIMED_PARKED:
2188 case TIMED_PINNED:
2189 status = JavaThreadStatus::PARKED_TIMED;
2190 break;
2191 case BLOCKING:
2192 case BLOCKED:
2193 status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER;
2194 break;
2195 case WAIT:
2196 status = JavaThreadStatus::IN_OBJECT_WAIT;
2197 break;
2198 case TIMED_WAIT:
2199 status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED;
2200 break;
2201 case TERMINATED:
2202 status = JavaThreadStatus::TERMINATED;
2203 break;
2204 default:
2205 ShouldNotReachHere();
2206 }
2207 return status;
2208 }
2209
2210 ObjectMonitor* java_lang_VirtualThread::current_pending_monitor(oop vthread) {
2211 ObjectWaiter* waiter = objectWaiter(vthread);
2212 if (waiter != nullptr && waiter->at_monitorenter()) {
2213 return waiter->monitor();
2214 }
2215 return nullptr;
2216 }
2217
2218 ObjectMonitor* java_lang_VirtualThread::current_waiting_monitor(oop vthread) {
2219 ObjectWaiter* waiter = objectWaiter(vthread);
2220 if (waiter != nullptr && waiter->is_wait()) {
2221 return waiter->monitor();
2222 }
2223 return nullptr;
2224 }
2225
2226 bool java_lang_VirtualThread::is_preempted(oop vthread) {
2227 oop continuation = java_lang_VirtualThread::continuation(vthread);
2228 assert(continuation != nullptr, "vthread with no continuation");
2229 stackChunkOop chunk = jdk_internal_vm_Continuation::tail(continuation);
2230 return chunk != nullptr && chunk->preempted();
2231 }
2232
2233 #if INCLUDE_CDS
2234 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2235 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2236 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2237 }
2238 #endif
2239
2240 // java_lang_Throwable
2241
2242 int java_lang_Throwable::_backtrace_offset;
2243 int java_lang_Throwable::_detailMessage_offset;
2244 int java_lang_Throwable::_stackTrace_offset;
2245 int java_lang_Throwable::_depth_offset;
2246 int java_lang_Throwable::_cause_offset;
2247 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2248
2249 #define THROWABLE_FIELDS_DO(macro) \
2250 macro(_backtrace_offset, k, "backtrace", object_signature, false); \
2251 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \
2252 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2253 macro(_depth_offset, k, "depth", int_signature, false); \
2254 macro(_cause_offset, k, "cause", throwable_signature, false); \
2255 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2256
2257 void java_lang_Throwable::compute_offsets() {
2258 InstanceKlass* k = vmClasses::Throwable_klass();
2259 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2260 }
2261
2262 #if INCLUDE_CDS
2263 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2264 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2265 }
2266 #endif
2267
2268 oop java_lang_Throwable::unassigned_stacktrace() {
2269 InstanceKlass* ik = vmClasses::Throwable_klass();
2270 oop base = ik->static_field_base_raw();
2271 return base->obj_field(_static_unassigned_stacktrace_offset);
2272 }
2273
2274 oop java_lang_Throwable::backtrace(oop throwable) {
2275 return throwable->obj_field_acquire(_backtrace_offset);
2276 }
2277
2278
2279 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2280 throwable->release_obj_field_put(_backtrace_offset, value);
2281 }
2282
2283 int java_lang_Throwable::depth(oop throwable) {
2284 return throwable->int_field(_depth_offset);
2285 }
2286
2287 void java_lang_Throwable::set_depth(oop throwable, int value) {
2288 throwable->int_field_put(_depth_offset, value);
2289 }
2290
2291 oop java_lang_Throwable::message(oop throwable) {
2292 return throwable->obj_field(_detailMessage_offset);
2293 }
2294
2295 const char* java_lang_Throwable::message_as_utf8(oop throwable) {
2296 oop msg = java_lang_Throwable::message(throwable);
2297 const char* msg_utf8 = nullptr;
2298 if (msg != nullptr) {
2299 msg_utf8 = java_lang_String::as_utf8_string(msg);
2300 }
2301 return msg_utf8;
2302 }
2303
2304 oop java_lang_Throwable::cause(oop throwable) {
2305 return throwable->obj_field(_cause_offset);
2306 }
2307
2308 void java_lang_Throwable::set_message(oop throwable, oop value) {
2309 throwable->obj_field_put(_detailMessage_offset, value);
2310 }
2311
2312
2313 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2314 throwable->obj_field_put(_stackTrace_offset, st_element_array);
2315 }
2316
2317 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2318 set_stacktrace(throwable, nullptr);
2319 }
2320
2321
2322 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2323 ResourceMark rm;
2324 Klass* k = throwable->klass();
2325 assert(k != nullptr, "just checking");
2326 st->print("%s", k->external_name());
2327 oop msg = message(throwable);
2328 if (msg != nullptr) {
2329 st->print(": %s", java_lang_String::as_utf8_string(msg));
2330 }
2331 }
2332
2333 // After this many redefines, the stack trace is unreliable.
2334 const int MAX_VERSION = USHRT_MAX;
2335
2336 static inline bool version_matches(Method* method, int version) {
2337 assert(version < MAX_VERSION, "version is too big");
2338 return method != nullptr && (method->constants()->version() == version);
2339 }
2340
2341 // This class provides a simple wrapper over the internal structure of
2342 // exception backtrace to insulate users of the backtrace from needing
2343 // to know what it looks like.
2344 // The code of this class is not GC safe. Allocations can only happen
2345 // in expand().
2346 class BacktraceBuilder: public StackObj {
2347 friend class BacktraceIterator;
2348 private:
2349 Handle _backtrace;
2350 objArrayOop _head;
2351 typeArrayOop _methods;
2352 typeArrayOop _bcis;
2353 objArrayOop _mirrors;
2354 typeArrayOop _names; // Needed to insulate method name against redefinition.
2355 // True if the top frame of the backtrace is omitted because it shall be hidden.
2356 bool _has_hidden_top_frame;
2357 int _index;
2358 NoSafepointVerifier _nsv;
2359
2360 enum {
2361 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2362 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2363 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2364 trace_names_offset = java_lang_Throwable::trace_names_offset,
2365 trace_conts_offset = java_lang_Throwable::trace_conts_offset,
2366 trace_next_offset = java_lang_Throwable::trace_next_offset,
2367 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2368 trace_size = java_lang_Throwable::trace_size,
2369 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2370 };
2371
2372 // get info out of chunks
2373 static typeArrayOop get_methods(objArrayHandle chunk) {
2374 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2375 assert(methods != nullptr, "method array should be initialized in backtrace");
2376 return methods;
2377 }
2378 static typeArrayOop get_bcis(objArrayHandle chunk) {
2379 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2380 assert(bcis != nullptr, "bci array should be initialized in backtrace");
2381 return bcis;
2382 }
2383 static objArrayOop get_mirrors(objArrayHandle chunk) {
2384 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2385 assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2386 return mirrors;
2387 }
2388 static typeArrayOop get_names(objArrayHandle chunk) {
2389 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2390 assert(names != nullptr, "names array should be initialized in backtrace");
2391 return names;
2392 }
2393 static bool has_hidden_top_frame(objArrayHandle chunk) {
2394 oop hidden = chunk->obj_at(trace_hidden_offset);
2395 return hidden != nullptr;
2396 }
2397
2398 public:
2399
2400 // constructor for new backtrace
2401 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2402 expand(CHECK);
2403 _backtrace = Handle(THREAD, _head);
2404 _index = 0;
2405 }
2406
2407 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2408 _methods = get_methods(backtrace);
2409 _bcis = get_bcis(backtrace);
2410 _mirrors = get_mirrors(backtrace);
2411 _names = get_names(backtrace);
2412 _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2413 assert(_methods->length() == _bcis->length() &&
2414 _methods->length() == _mirrors->length() &&
2415 _mirrors->length() == _names->length(),
2416 "method and source information arrays should match");
2417
2418 // head is the preallocated backtrace
2419 _head = backtrace();
2420 _backtrace = Handle(thread, _head);
2421 _index = 0;
2422 }
2423
2424 void expand(TRAPS) {
2425 objArrayHandle old_head(THREAD, _head);
2426 PauseNoSafepointVerifier pnsv(&_nsv);
2427
2428 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2429 objArrayHandle new_head(THREAD, head);
2430
2431 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2432 typeArrayHandle new_methods(THREAD, methods);
2433
2434 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2435 typeArrayHandle new_bcis(THREAD, bcis);
2436
2437 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2438 objArrayHandle new_mirrors(THREAD, mirrors);
2439
2440 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2441 typeArrayHandle new_names(THREAD, names);
2442
2443 if (!old_head.is_null()) {
2444 old_head->obj_at_put(trace_next_offset, new_head());
2445 }
2446 new_head->obj_at_put(trace_methods_offset, new_methods());
2447 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2448 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2449 new_head->obj_at_put(trace_names_offset, new_names());
2450 new_head->obj_at_put(trace_hidden_offset, nullptr);
2451
2452 _head = new_head();
2453 _methods = new_methods();
2454 _bcis = new_bcis();
2455 _mirrors = new_mirrors();
2456 _names = new_names();
2457 _index = 0;
2458 }
2459
2460 oop backtrace() {
2461 return _backtrace();
2462 }
2463
2464 inline void push(Method* method, int bci, TRAPS) {
2465 // Smear the -1 bci to 0 since the array only holds unsigned
2466 // shorts. The later line number lookup would just smear the -1
2467 // to a 0 even if it could be recorded.
2468 if (bci == SynchronizationEntryBCI) bci = 0;
2469
2470 if (_index >= trace_chunk_size) {
2471 methodHandle mhandle(THREAD, method);
2472 expand(CHECK);
2473 method = mhandle();
2474 }
2475
2476 _methods->ushort_at_put(_index, method->orig_method_idnum());
2477 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2478
2479 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2480 // klass owning the symbols alive so their refcounts aren't decremented.
2481 Symbol* name = method->name();
2482 _names->symbol_at_put(_index, name);
2483
2484 // We need to save the mirrors in the backtrace to keep the class
2485 // from being unloaded while we still have this stack trace.
2486 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2487 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2488
2489 _index++;
2490 }
2491
2492 void set_has_hidden_top_frame() {
2493 if (!_has_hidden_top_frame) {
2494 // It would be nice to add java/lang/Boolean::TRUE here
2495 // to indicate that this backtrace has a hidden top frame.
2496 // But this code is used before TRUE is allocated.
2497 // Therefore let's just use an arbitrary legal oop
2498 // available right here. _methods is a short[].
2499 assert(_methods != nullptr, "we need a legal oop");
2500 _has_hidden_top_frame = true;
2501 _head->obj_at_put(trace_hidden_offset, _methods);
2502 }
2503 }
2504 };
2505
2506 struct BacktraceElement : public StackObj {
2507 int _method_id;
2508 int _bci;
2509 int _version;
2510 Symbol* _name;
2511 Handle _mirror;
2512 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2513 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2514 };
2515
2516 class BacktraceIterator : public StackObj {
2517 int _index;
2518 objArrayHandle _result;
2519 objArrayHandle _mirrors;
2520 typeArrayHandle _methods;
2521 typeArrayHandle _bcis;
2522 typeArrayHandle _names;
2523
2524 void init(objArrayHandle result, Thread* thread) {
2525 // Get method id, bci, version and mirror from chunk
2526 _result = result;
2527 if (_result.not_null()) {
2528 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2529 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2530 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2531 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2532 _index = 0;
2533 }
2534 }
2535 public:
2536 BacktraceIterator(objArrayHandle result, Thread* thread) {
2537 init(result, thread);
2538 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2539 }
2540
2541 BacktraceElement next(Thread* thread) {
2542 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2543 _methods->ushort_at(_index),
2544 Backtrace::version_at(_bcis->int_at(_index)),
2545 Backtrace::bci_at(_bcis->int_at(_index)),
2546 _names->symbol_at(_index));
2547 _index++;
2548
2549 if (_index >= java_lang_Throwable::trace_chunk_size) {
2550 int next_offset = java_lang_Throwable::trace_next_offset;
2551 // Get next chunk
2552 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2553 init(result, thread);
2554 }
2555 return e;
2556 }
2557
2558 bool repeat() {
2559 return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2560 }
2561 };
2562
2563
2564 // Print stack trace element to resource allocated buffer
2565 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2566 int version, int bci, Symbol* name) {
2567 ResourceMark rm;
2568
2569 // Get strings and string lengths
2570 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2571 const char* klass_name = holder->external_name();
2572 int buf_len = (int)strlen(klass_name);
2573
2574 char* method_name = name->as_C_string();
2575 buf_len += (int)strlen(method_name);
2576
2577 char* source_file_name = nullptr;
2578 Symbol* source = Backtrace::get_source_file_name(holder, version);
2579 if (source != nullptr) {
2580 source_file_name = source->as_C_string();
2581 buf_len += (int)strlen(source_file_name);
2582 }
2583
2584 char *module_name = nullptr, *module_version = nullptr;
2585 ModuleEntry* module = holder->module();
2586 if (module->is_named()) {
2587 module_name = module->name()->as_C_string();
2588 buf_len += (int)strlen(module_name);
2589 if (module->version() != nullptr) {
2590 module_version = module->version()->as_C_string();
2591 buf_len += (int)strlen(module_version);
2592 }
2593 }
2594
2595 // Allocate temporary buffer with extra space for formatting and line number
2596 const size_t buf_size = buf_len + 64;
2597 char* buf = NEW_RESOURCE_ARRAY(char, buf_size);
2598
2599 // Print stack trace line in buffer
2600 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name);
2601
2602 // Print module information
2603 if (module_name != nullptr) {
2604 if (module_version != nullptr) {
2605 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version);
2606 } else {
2607 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name);
2608 }
2609 }
2610
2611 // The method can be null if the requested class version is gone
2612 Method* method = holder->method_with_orig_idnum(method_id, version);
2613 if (!version_matches(method, version)) {
2614 strcat(buf, "Redefined)");
2615 } else {
2616 int line_number = Backtrace::get_line_number(method, bci);
2617 if (line_number == -2) {
2618 strcat(buf, "Native Method)");
2619 } else {
2620 if (source_file_name != nullptr && (line_number != -1)) {
2621 // Sourcename and linenumber
2622 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number);
2623 } else if (source_file_name != nullptr) {
2624 // Just sourcename
2625 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name);
2626 } else {
2627 // Neither sourcename nor linenumber
2628 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)");
2629 }
2630 nmethod* nm = method->code();
2631 if (WizardMode && nm != nullptr) {
2632 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2633 }
2634 }
2635 }
2636
2637 st->print_cr("%s", buf);
2638 }
2639
2640 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2641 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2642 int method_id = method->orig_method_idnum();
2643 int version = method->constants()->version();
2644 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2645 }
2646
2647 /**
2648 * Print the throwable message and its stack trace plus all causes by walking the
2649 * cause chain. The output looks the same as of Throwable.printStackTrace().
2650 */
2651 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2652 // First, print the message.
2653 print(throwable(), st);
2654 st->cr();
2655
2656 // Now print the stack trace.
2657 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2658 while (throwable.not_null()) {
2659 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2660 if (result.is_null()) {
2661 st->print_raw_cr("\t<<no stack trace available>>");
2662 return;
2663 }
2664 BacktraceIterator iter(result, THREAD);
2665
2666 while (iter.repeat()) {
2667 BacktraceElement bte = iter.next(THREAD);
2668 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2669 }
2670 if (THREAD->can_call_java()) {
2671 // Call getCause() which doesn't necessarily return the _cause field.
2672 ExceptionMark em(THREAD);
2673 JavaValue cause(T_OBJECT);
2674 JavaCalls::call_virtual(&cause,
2675 throwable,
2676 throwable->klass(),
2677 vmSymbols::getCause_name(),
2678 vmSymbols::void_throwable_signature(),
2679 THREAD);
2680 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2681 if (HAS_PENDING_EXCEPTION) {
2682 CLEAR_PENDING_EXCEPTION;
2683 throwable = Handle();
2684 } else {
2685 throwable = Handle(THREAD, cause.get_oop());
2686 if (throwable.not_null()) {
2687 st->print("Caused by: ");
2688 print(throwable(), st);
2689 st->cr();
2690 }
2691 }
2692 } else {
2693 st->print_raw_cr("<<cannot call Java to get cause>>");
2694 return;
2695 }
2696 }
2697 }
2698
2699 /**
2700 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2701 */
2702 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2703 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2704 JavaValue result(T_VOID);
2705 JavaCalls::call_virtual(&result,
2706 throwable,
2707 vmClasses::Throwable_klass(),
2708 vmSymbols::printStackTrace_name(),
2709 vmSymbols::void_method_signature(),
2710 THREAD);
2711 }
2712
2713 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2714 if (!StackTraceInThrowable) return;
2715 ResourceMark rm(THREAD);
2716
2717 // Start out by clearing the backtrace for this object, in case the VM
2718 // runs out of memory while allocating the stack trace
2719 set_backtrace(throwable(), nullptr);
2720 // Clear lazily constructed Java level stacktrace if refilling occurs
2721 // This is unnecessary in 1.7+ but harmless
2722 clear_stacktrace(throwable());
2723
2724 int max_depth = MaxJavaStackTraceDepth;
2725 JavaThread* thread = THREAD;
2726
2727 BacktraceBuilder bt(CHECK);
2728
2729 // If there is no Java frame just return the method that was being called
2730 // with bci 0
2731 if (!thread->has_last_Java_frame()) {
2732 if (max_depth >= 1 && method() != nullptr) {
2733 bt.push(method(), 0, CHECK);
2734 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2735 set_depth(throwable(), 1);
2736 set_backtrace(throwable(), bt.backtrace());
2737 }
2738 return;
2739 }
2740
2741 // Instead of using vframe directly, this version of fill_in_stack_trace
2742 // basically handles everything by hand. This significantly improved the
2743 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2744 // See bug 6333838 for more details.
2745 // The "ASSERT" here is to verify this method generates the exactly same stack
2746 // trace as utilizing vframe.
2747 #ifdef ASSERT
2748 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2749 #endif
2750 int total_count = 0;
2751 RegisterMap map(thread,
2752 RegisterMap::UpdateMap::skip,
2753 RegisterMap::ProcessFrames::skip,
2754 RegisterMap::WalkContinuation::include);
2755 int decode_offset = 0;
2756 nmethod* nm = nullptr;
2757 bool skip_fillInStackTrace_check = false;
2758 bool skip_throwableInit_check = false;
2759 bool skip_hidden = !ShowHiddenFrames;
2760 bool show_carrier = ShowCarrierFrames;
2761 ContinuationEntry* cont_entry = thread->last_continuation();
2762 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2763 Method* method = nullptr;
2764 int bci = 0;
2765
2766 // Compiled java method case.
2767 if (decode_offset != 0) {
2768 DebugInfoReadStream stream(nm, decode_offset);
2769 decode_offset = stream.read_int();
2770 method = (Method*)nm->metadata_at(stream.read_int());
2771 bci = stream.read_bci();
2772 } else {
2773 if (fr.is_first_frame()) break;
2774
2775 if (Continuation::is_continuation_enterSpecial(fr)) {
2776 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2777 if (!show_carrier && cont_entry->is_virtual_thread()) {
2778 break;
2779 }
2780 cont_entry = cont_entry->parent();
2781 }
2782
2783 address pc = fr.pc();
2784 if (fr.is_interpreted_frame()) {
2785 address bcp;
2786 if (!map.in_cont()) {
2787 bcp = fr.interpreter_frame_bcp();
2788 method = fr.interpreter_frame_method();
2789 } else {
2790 bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2791 method = map.stack_chunk()->interpreter_frame_method(fr);
2792 }
2793 bci = method->bci_from(bcp);
2794 fr = fr.sender(&map);
2795 } else {
2796 CodeBlob* cb = fr.cb();
2797 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2798 // but non nmethod
2799 fr = fr.sender(&map);
2800 if (cb == nullptr || !cb->is_nmethod()) {
2801 continue;
2802 }
2803 nm = cb->as_nmethod();
2804 assert(nm->method() != nullptr, "must be");
2805 if (nm->method()->is_native()) {
2806 method = nm->method();
2807 bci = 0;
2808 } else {
2809 PcDesc* pd = nm->pc_desc_at(pc);
2810 decode_offset = pd->scope_decode_offset();
2811 // if decode_offset is not equal to 0, it will execute the
2812 // "compiled java method case" at the beginning of the loop.
2813 continue;
2814 }
2815 }
2816 }
2817 #ifdef ASSERT
2818 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2819 assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2820 st.next();
2821 }
2822 #endif
2823
2824 // the format of the stacktrace will be:
2825 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2826 // - 0 or more <init> methods for the exception class (skipped)
2827 // - rest of the stack
2828
2829 if (!skip_fillInStackTrace_check) {
2830 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2831 throwable->is_a(method->method_holder())) {
2832 continue;
2833 }
2834 else {
2835 skip_fillInStackTrace_check = true; // gone past them all
2836 }
2837 }
2838 if (!skip_throwableInit_check) {
2839 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2840
2841 // skip <init> methods of the exception class and superclasses
2842 // This is similar to classic VM.
2843 if (method->name() == vmSymbols::object_initializer_name() &&
2844 throwable->is_a(method->method_holder())) {
2845 continue;
2846 } else {
2847 // there are none or we've seen them all - either way stop checking
2848 skip_throwableInit_check = true;
2849 }
2850 }
2851 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2852 if (skip_hidden) {
2853 if (total_count == 0) {
2854 // The top frame will be hidden from the stack trace.
2855 bt.set_has_hidden_top_frame();
2856 }
2857 continue;
2858 }
2859 }
2860
2861 bt.push(method, bci, CHECK);
2862 total_count++;
2863 }
2864
2865 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2866
2867 // Put completed stack trace into throwable object
2868 set_backtrace(throwable(), bt.backtrace());
2869 set_depth(throwable(), total_count);
2870 }
2871
2872 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2873 // No-op if stack trace is disabled
2874 if (!StackTraceInThrowable) {
2875 return;
2876 }
2877
2878 // Disable stack traces for some preallocated out of memory errors
2879 if (!Universe::should_fill_in_stack_trace(throwable)) {
2880 return;
2881 }
2882
2883 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2884 PreserveExceptionMark pm(THREAD);
2885
2886 fill_in_stack_trace(throwable, method, THREAD);
2887 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2888 // original exception via the PreserveExceptionMark destructor.
2889 CLEAR_PENDING_EXCEPTION;
2890 }
2891
2892 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2893 // Allocate stack trace - backtrace is created but not filled in
2894
2895 // No-op if stack trace is disabled
2896 if (!StackTraceInThrowable) return;
2897 BacktraceBuilder bt(CHECK); // creates a backtrace
2898 set_backtrace(throwable(), bt.backtrace());
2899 }
2900
2901
2902 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2903 // Fill in stack trace into preallocated backtrace (no GC)
2904
2905 // No-op if stack trace is disabled
2906 if (!StackTraceInThrowable) return;
2907
2908 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2909
2910 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2911
2912 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2913 assert(backtrace.not_null(), "backtrace should have been preallocated");
2914
2915 ResourceMark rm(THREAD);
2916 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2917
2918 BacktraceBuilder bt(THREAD, backtrace);
2919
2920 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2921 // methods as preallocated errors aren't created by "java" code.
2922
2923 // fill in as much stack trace as possible
2924 int chunk_count = 0;
2925 for (;!st.at_end(); st.next()) {
2926 bt.push(st.method(), st.bci(), CHECK);
2927 chunk_count++;
2928
2929 // Bail-out for deep stacks
2930 if (chunk_count >= trace_chunk_size) break;
2931 }
2932 set_depth(throwable(), chunk_count);
2933 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2934
2935 // We support the Throwable immutability protocol defined for Java 7.
2936 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2937 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2938 }
2939
2940 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2941 objArrayHandle stack_trace_array_h, TRAPS) {
2942
2943 if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2944 THROW(vmSymbols::java_lang_NullPointerException());
2945 }
2946
2947 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2948
2949 if (stack_trace_array_h->length() != depth) {
2950 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2951 }
2952
2953 objArrayHandle result(THREAD, objArrayOop(backtrace()));
2954 BacktraceIterator iter(result, THREAD);
2955
2956 int index = 0;
2957 while (iter.repeat()) {
2958 BacktraceElement bte = iter.next(THREAD);
2959
2960 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2961
2962 if (stack_trace_element.is_null()) {
2963 THROW(vmSymbols::java_lang_NullPointerException());
2964 }
2965
2966 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2967 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2968
2969 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2970 method,
2971 bte._version,
2972 bte._bci,
2973 bte._name,
2974 CHECK);
2975 }
2976 }
2977
2978 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
2979 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
2980 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
2981 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
2982 // symbolic stacktrace of 'throwable'.
2983 assert(throwable.not_null(), "shouldn't be");
2984
2985 // Now create the message from the original exception and thread name.
2986 ResourceMark rm(current);
2987 const char *message = nullptr;
2988 oop detailed_message = java_lang_Throwable::message(throwable());
2989 if (detailed_message != nullptr) {
2990 message = java_lang_String::as_utf8_string(detailed_message);
2991 }
2992 stringStream st;
2993 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
2994 message == nullptr ? "" : ":");
2995 if (message == nullptr) {
2996 st.print("[in thread \"%s\"]", current->name());
2997 } else {
2998 st.print("%s [in thread \"%s\"]", message, current->name());
2999 }
3000
3001 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
3002 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
3003 // If new_exception returns a different exception while creating the exception,
3004 // abandon the attempt to save the initialization error and return null.
3005 if (init_error->klass()->name() != exception_name) {
3006 log_info(class, init)("Exception %s thrown while saving initialization exception",
3007 init_error->klass()->external_name());
3008 return Handle();
3009 }
3010
3011 // Call to java to fill in the stack trace and clear declaringClassObject to
3012 // not keep classes alive in the stack trace.
3013 // call this: public StackTraceElement[] getStackTrace()
3014 JavaValue result(T_ARRAY);
3015 JavaCalls::call_virtual(&result, throwable,
3016 vmClasses::Throwable_klass(),
3017 vmSymbols::getStackTrace_name(),
3018 vmSymbols::getStackTrace_signature(),
3019 current);
3020 if (!current->has_pending_exception()){
3021 Handle stack_trace(current, result.get_oop());
3022 assert(stack_trace->is_objArray(), "Should be an array");
3023 java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
3024 // Clear backtrace because the stacktrace should be used instead.
3025 set_backtrace(init_error(), nullptr);
3026 } else {
3027 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
3028 init_error->klass()->external_name());
3029 current->clear_pending_exception();
3030 }
3031
3032 return init_error;
3033 }
3034
3035 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
3036 JavaThread* current = JavaThread::current();
3037 objArrayHandle result(current, objArrayOop(backtrace(throwable)));
3038 BacktraceIterator iter(result, current);
3039 // No backtrace available.
3040 if (!iter.repeat()) return false;
3041
3042 // If the exception happened in a frame that has been hidden, i.e.,
3043 // omitted from the back trace, we can not compute the message.
3044 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
3045 if (hidden != nullptr) {
3046 return false;
3047 }
3048
3049 // Get first backtrace element.
3050 BacktraceElement bte = iter.next(current);
3051
3052 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
3053 assert(holder != nullptr, "first element should be non-null");
3054 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
3055
3056 // Original version is no longer available.
3057 if (m == nullptr || !version_matches(m, bte._version)) {
3058 return false;
3059 }
3060
3061 *method = m;
3062 *bci = bte._bci;
3063 return true;
3064 }
3065
3066 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
3067 // Allocate java.lang.StackTraceElement instance
3068 InstanceKlass* k = vmClasses::StackTraceElement_klass();
3069 assert(k != nullptr, "must be loaded in 1.4+");
3070 if (k->should_be_initialized()) {
3071 k->initialize(CHECK_NULL);
3072 }
3073
3074 Handle element = k->allocate_instance_handle(CHECK_NULL);
3075
3076 int version = method->constants()->version();
3077 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
3078 return element();
3079 }
3080
3081 void java_lang_StackTraceElement::fill_in(Handle element,
3082 InstanceKlass* holder, const methodHandle& method,
3083 int version, int bci, Symbol* name, TRAPS) {
3084 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
3085
3086 ResourceMark rm(THREAD);
3087 HandleMark hm(THREAD);
3088
3089 // Fill in class name
3090 Handle java_class(THREAD, holder->java_mirror());
3091 oop classname = java_lang_Class::name(java_class, CHECK);
3092 java_lang_StackTraceElement::set_declaringClass(element(), classname);
3093 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
3094
3095 oop loader = holder->class_loader();
3096 if (loader != nullptr) {
3097 oop loader_name = java_lang_ClassLoader::name(loader);
3098 if (loader_name != nullptr)
3099 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
3100 }
3101
3102 // Fill in method name
3103 oop methodname = StringTable::intern(name, CHECK);
3104 java_lang_StackTraceElement::set_methodName(element(), methodname);
3105
3106 // Fill in module name and version
3107 ModuleEntry* module = holder->module();
3108 if (module->is_named()) {
3109 oop module_name = StringTable::intern(module->name(), CHECK);
3110 java_lang_StackTraceElement::set_moduleName(element(), module_name);
3111 oop module_version;
3112 if (module->version() != nullptr) {
3113 module_version = StringTable::intern(module->version(), CHECK);
3114 } else {
3115 module_version = nullptr;
3116 }
3117 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
3118 }
3119
3120 if (method() == nullptr || !version_matches(method(), version)) {
3121 // The method was redefined, accurate line number information isn't available
3122 java_lang_StackTraceElement::set_fileName(element(), nullptr);
3123 java_lang_StackTraceElement::set_lineNumber(element(), -1);
3124 } else {
3125 Symbol* source;
3126 oop source_file;
3127 int line_number;
3128 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
3129
3130 java_lang_StackTraceElement::set_fileName(element(), source_file);
3131 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
3132 }
3133 }
3134
3135 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
3136 InstanceKlass* holder,
3137 int version,
3138 const methodHandle& method,
3139 int bci,
3140 Symbol*& source,
3141 oop& source_file,
3142 int& line_number, TRAPS) {
3143 // Fill in source file name and line number.
3144 source = Backtrace::get_source_file_name(holder, version);
3145 source_file = java_lang_Class::source_file(java_class());
3146 if (source != nullptr) {
3147 // Class was not redefined. We can trust its cache if set,
3148 // else we have to initialize it.
3149 if (source_file == nullptr) {
3150 source_file = StringTable::intern(source, CHECK);
3151 java_lang_Class::set_source_file(java_class(), source_file);
3152 }
3153 } else {
3154 // Class was redefined. Dump the cache if it was set.
3155 if (source_file != nullptr) {
3156 source_file = nullptr;
3157 java_lang_Class::set_source_file(java_class(), source_file);
3158 }
3159 }
3160 line_number = Backtrace::get_line_number(method(), bci);
3161 }
3162
3163 #if INCLUDE_JVMCI
3164 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
3165 Symbol*& filename, int& line_number, TRAPS) {
3166 ResourceMark rm(THREAD);
3167 HandleMark hm(THREAD);
3168
3169 filename = nullptr;
3170 line_number = -1;
3171
3172 oop source_file;
3173 int version = method->constants()->version();
3174 InstanceKlass* holder = method->method_holder();
3175 Handle java_class(THREAD, holder->java_mirror());
3176 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
3177 }
3178 #endif // INCLUDE_JVMCI
3179
3180 // java_lang_ClassFrameInfo
3181
3182 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
3183 int java_lang_ClassFrameInfo::_flags_offset;
3184
3185 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
3186 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \
3187 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false)
3188
3189 void java_lang_ClassFrameInfo::compute_offsets() {
3190 InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
3191 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3192 }
3193
3194 #if INCLUDE_CDS
3195 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
3196 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3197 }
3198 #endif
3199
3200 static int get_flags(const methodHandle& m) {
3201 int flags = m->access_flags().as_method_flags();
3202 if (m->is_object_initializer()) {
3203 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR;
3204 } else {
3205 // Note: Static initializers can be here. Record them as plain methods.
3206 flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
3207 }
3208 if (m->caller_sensitive()) {
3209 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
3210 }
3211 if (m->is_hidden()) {
3212 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3213 }
3214 assert((flags & 0xFF000000) == 0, "unexpected flags");
3215 return flags;
3216 }
3217
3218 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3219 return obj->obj_field(_classOrMemberName_offset);
3220 }
3221
3222 int java_lang_ClassFrameInfo::flags(oop obj) {
3223 return obj->int_field(_flags_offset);
3224 }
3225
3226 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3227 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3228 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3229 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3230 stackFrame->int_field_put(_flags_offset, flags);
3231 }
3232
3233 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3234 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3235 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3236 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3237 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3238 stackFrame->int_field_put(_flags_offset, flags);
3239 }
3240
3241
3242 // java_lang_StackFrameInfo
3243
3244 int java_lang_StackFrameInfo::_type_offset;
3245 int java_lang_StackFrameInfo::_name_offset;
3246 int java_lang_StackFrameInfo::_bci_offset;
3247 int java_lang_StackFrameInfo::_version_offset;
3248 int java_lang_StackFrameInfo::_contScope_offset;
3249
3250 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3251 macro(_type_offset, k, "type", object_signature, false); \
3252 macro(_name_offset, k, "name", string_signature, false); \
3253 macro(_bci_offset, k, "bci", int_signature, false); \
3254 macro(_contScope_offset, k, "contScope", continuationscope_signature, false)
3255
3256 void java_lang_StackFrameInfo::compute_offsets() {
3257 InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3258 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3259 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3260 }
3261
3262 #if INCLUDE_CDS
3263 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3264 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3265 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3266 }
3267 #endif
3268
3269 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3270 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3271 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3272 return method;
3273 }
3274
3275 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3276 // set Method* or mid/cpref
3277 HandleMark hm(THREAD);
3278 Handle cont_h(THREAD, cont);
3279 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3280
3281 // set bci
3282 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3283 // method may be redefined; store the version
3284 int version = method->constants()->version();
3285 assert((jushort)version == version, "version should be short");
3286 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3287
3288 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3289 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3290 }
3291
3292 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3293 ResourceMark rm(THREAD);
3294 HandleMark hm(THREAD);
3295
3296 Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3297 InstanceKlass* holder = method->method_holder();
3298 short version = stackFrame->short_field(_version_offset);
3299 int bci = stackFrame->int_field(_bci_offset);
3300 Symbol* name = method->name();
3301 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3302 }
3303
3304 oop java_lang_StackFrameInfo::type(oop obj) {
3305 return obj->obj_field(_type_offset);
3306 }
3307
3308 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3309 obj->obj_field_put(_type_offset, value);
3310 }
3311
3312 oop java_lang_StackFrameInfo::name(oop obj) {
3313 return obj->obj_field(_name_offset);
3314 }
3315
3316 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3317 obj->obj_field_put(_name_offset, value);
3318 }
3319
3320 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3321 obj->short_field_put(_version_offset, value);
3322 }
3323
3324 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3325 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3326 obj->int_field_put(_bci_offset, value);
3327 }
3328
3329 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3330 obj->obj_field_put(_contScope_offset, value);
3331 }
3332
3333 int java_lang_LiveStackFrameInfo::_monitors_offset;
3334 int java_lang_LiveStackFrameInfo::_locals_offset;
3335 int java_lang_LiveStackFrameInfo::_operands_offset;
3336 int java_lang_LiveStackFrameInfo::_mode_offset;
3337
3338 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3339 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
3340 macro(_locals_offset, k, "locals", object_array_signature, false); \
3341 macro(_operands_offset, k, "operands", object_array_signature, false); \
3342 macro(_mode_offset, k, "mode", int_signature, false)
3343
3344 void java_lang_LiveStackFrameInfo::compute_offsets() {
3345 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3346 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3347 }
3348
3349 #if INCLUDE_CDS
3350 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3351 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3352 }
3353 #endif
3354
3355 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3356 obj->obj_field_put(_monitors_offset, value);
3357 }
3358
3359 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3360 obj->obj_field_put(_locals_offset, value);
3361 }
3362
3363 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3364 obj->obj_field_put(_operands_offset, value);
3365 }
3366
3367 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3368 obj->int_field_put(_mode_offset, value);
3369 }
3370
3371
3372 // java_lang_AccessibleObject
3373
3374 int java_lang_reflect_AccessibleObject::_override_offset;
3375
3376 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3377 macro(_override_offset, k, "override", bool_signature, false)
3378
3379 void java_lang_reflect_AccessibleObject::compute_offsets() {
3380 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3381 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3382 }
3383
3384 #if INCLUDE_CDS
3385 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3386 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3387 }
3388 #endif
3389
3390 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3391 return (jboolean) reflect->bool_field(_override_offset);
3392 }
3393
3394 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3395 reflect->bool_field_put(_override_offset, (int) value);
3396 }
3397
3398 // java_lang_reflect_Method
3399
3400 int java_lang_reflect_Method::_clazz_offset;
3401 int java_lang_reflect_Method::_name_offset;
3402 int java_lang_reflect_Method::_returnType_offset;
3403 int java_lang_reflect_Method::_parameterTypes_offset;
3404 int java_lang_reflect_Method::_exceptionTypes_offset;
3405 int java_lang_reflect_Method::_slot_offset;
3406 int java_lang_reflect_Method::_modifiers_offset;
3407 int java_lang_reflect_Method::_signature_offset;
3408 int java_lang_reflect_Method::_annotations_offset;
3409 int java_lang_reflect_Method::_parameter_annotations_offset;
3410 int java_lang_reflect_Method::_annotation_default_offset;
3411
3412 #define METHOD_FIELDS_DO(macro) \
3413 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3414 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3415 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
3416 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3417 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3418 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3419 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3420 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3421 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3422 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3423 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
3424
3425 void java_lang_reflect_Method::compute_offsets() {
3426 InstanceKlass* k = vmClasses::reflect_Method_klass();
3427 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3428 }
3429
3430 #if INCLUDE_CDS
3431 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3432 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3433 }
3434 #endif
3435
3436 Handle java_lang_reflect_Method::create(TRAPS) {
3437 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3438 Klass* klass = vmClasses::reflect_Method_klass();
3439 // This class is eagerly initialized during VM initialization, since we keep a reference
3440 // to one of the methods
3441 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
3442 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
3443 }
3444
3445 oop java_lang_reflect_Method::clazz(oop reflect) {
3446 return reflect->obj_field(_clazz_offset);
3447 }
3448
3449 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3450 reflect->obj_field_put(_clazz_offset, value);
3451 }
3452
3453 int java_lang_reflect_Method::slot(oop reflect) {
3454 return reflect->int_field(_slot_offset);
3455 }
3456
3457 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3458 reflect->int_field_put(_slot_offset, value);
3459 }
3460
3461 void java_lang_reflect_Method::set_name(oop method, oop value) {
3462 method->obj_field_put(_name_offset, value);
3463 }
3464
3465 oop java_lang_reflect_Method::return_type(oop method) {
3466 return method->obj_field(_returnType_offset);
3467 }
3468
3469 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3470 method->obj_field_put(_returnType_offset, value);
3471 }
3472
3473 oop java_lang_reflect_Method::parameter_types(oop method) {
3474 return method->obj_field(_parameterTypes_offset);
3475 }
3476
3477 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3478 method->obj_field_put(_parameterTypes_offset, value);
3479 }
3480
3481 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3482 method->obj_field_put(_exceptionTypes_offset, value);
3483 }
3484
3485 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3486 method->int_field_put(_modifiers_offset, value);
3487 }
3488
3489 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3490 method->obj_field_put(_signature_offset, value);
3491 }
3492
3493 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3494 method->obj_field_put(_annotations_offset, value);
3495 }
3496
3497 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3498 method->obj_field_put(_parameter_annotations_offset, value);
3499 }
3500
3501 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3502 method->obj_field_put(_annotation_default_offset, value);
3503 }
3504
3505 int java_lang_reflect_Constructor::_clazz_offset;
3506 int java_lang_reflect_Constructor::_parameterTypes_offset;
3507 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3508 int java_lang_reflect_Constructor::_slot_offset;
3509 int java_lang_reflect_Constructor::_modifiers_offset;
3510 int java_lang_reflect_Constructor::_signature_offset;
3511 int java_lang_reflect_Constructor::_annotations_offset;
3512 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3513
3514 #define CONSTRUCTOR_FIELDS_DO(macro) \
3515 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3516 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3517 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3518 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3519 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3520 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3521 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3522 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3523
3524 void java_lang_reflect_Constructor::compute_offsets() {
3525 InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3526 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3527 }
3528
3529 #if INCLUDE_CDS
3530 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3531 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3532 }
3533 #endif
3534
3535 Handle java_lang_reflect_Constructor::create(TRAPS) {
3536 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3537 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3538 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3539 InstanceKlass* ik = InstanceKlass::cast(k);
3540 // Ensure it is initialized
3541 ik->initialize(CHECK_NH);
3542 return ik->allocate_instance_handle(THREAD);
3543 }
3544
3545 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3546 return reflect->obj_field(_clazz_offset);
3547 }
3548
3549 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3550 reflect->obj_field_put(_clazz_offset, value);
3551 }
3552
3553 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3554 return constructor->obj_field(_parameterTypes_offset);
3555 }
3556
3557 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3558 constructor->obj_field_put(_parameterTypes_offset, value);
3559 }
3560
3561 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3562 constructor->obj_field_put(_exceptionTypes_offset, value);
3563 }
3564
3565 int java_lang_reflect_Constructor::slot(oop reflect) {
3566 return reflect->int_field(_slot_offset);
3567 }
3568
3569 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3570 reflect->int_field_put(_slot_offset, value);
3571 }
3572
3573 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3574 constructor->int_field_put(_modifiers_offset, value);
3575 }
3576
3577 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3578 constructor->obj_field_put(_signature_offset, value);
3579 }
3580
3581 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3582 constructor->obj_field_put(_annotations_offset, value);
3583 }
3584
3585 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3586 method->obj_field_put(_parameter_annotations_offset, value);
3587 }
3588
3589 int java_lang_reflect_Field::_clazz_offset;
3590 int java_lang_reflect_Field::_name_offset;
3591 int java_lang_reflect_Field::_type_offset;
3592 int java_lang_reflect_Field::_slot_offset;
3593 int java_lang_reflect_Field::_modifiers_offset;
3594 int java_lang_reflect_Field::_trusted_final_offset;
3595 int java_lang_reflect_Field::_signature_offset;
3596 int java_lang_reflect_Field::_annotations_offset;
3597
3598 #define FIELD_FIELDS_DO(macro) \
3599 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3600 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3601 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \
3602 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3603 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3604 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \
3605 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3606 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3607
3608 void java_lang_reflect_Field::compute_offsets() {
3609 InstanceKlass* k = vmClasses::reflect_Field_klass();
3610 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3611 }
3612
3613 #if INCLUDE_CDS
3614 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3615 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3616 }
3617 #endif
3618
3619 Handle java_lang_reflect_Field::create(TRAPS) {
3620 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3621 Symbol* name = vmSymbols::java_lang_reflect_Field();
3622 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3623 InstanceKlass* ik = InstanceKlass::cast(k);
3624 // Ensure it is initialized
3625 ik->initialize(CHECK_NH);
3626 return ik->allocate_instance_handle(THREAD);
3627 }
3628
3629 oop java_lang_reflect_Field::clazz(oop reflect) {
3630 return reflect->obj_field(_clazz_offset);
3631 }
3632
3633 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3634 reflect->obj_field_put(_clazz_offset, value);
3635 }
3636
3637 oop java_lang_reflect_Field::name(oop field) {
3638 return field->obj_field(_name_offset);
3639 }
3640
3641 void java_lang_reflect_Field::set_name(oop field, oop value) {
3642 field->obj_field_put(_name_offset, value);
3643 }
3644
3645 oop java_lang_reflect_Field::type(oop field) {
3646 return field->obj_field(_type_offset);
3647 }
3648
3649 void java_lang_reflect_Field::set_type(oop field, oop value) {
3650 field->obj_field_put(_type_offset, value);
3651 }
3652
3653 int java_lang_reflect_Field::slot(oop reflect) {
3654 return reflect->int_field(_slot_offset);
3655 }
3656
3657 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3658 reflect->int_field_put(_slot_offset, value);
3659 }
3660
3661 int java_lang_reflect_Field::modifiers(oop field) {
3662 return field->int_field(_modifiers_offset);
3663 }
3664
3665 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3666 field->int_field_put(_modifiers_offset, value);
3667 }
3668
3669 void java_lang_reflect_Field::set_trusted_final(oop field) {
3670 field->bool_field_put(_trusted_final_offset, true);
3671 }
3672
3673 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3674 field->obj_field_put(_signature_offset, value);
3675 }
3676
3677 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3678 field->obj_field_put(_annotations_offset, value);
3679 }
3680
3681 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3682 // Allocate java.lang.reflect.RecordComponent instance
3683 HandleMark hm(THREAD);
3684 InstanceKlass* ik = vmClasses::RecordComponent_klass();
3685 assert(ik != nullptr, "must be loaded");
3686 ik->initialize(CHECK_NULL);
3687
3688 Handle element = ik->allocate_instance_handle(CHECK_NULL);
3689
3690 Handle decl_class(THREAD, holder->java_mirror());
3691 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3692
3693 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3694 oop component_name = StringTable::intern(name, CHECK_NULL);
3695 java_lang_reflect_RecordComponent::set_name(element(), component_name);
3696
3697 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3698 Handle component_type_h =
3699 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3700 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3701
3702 Method* accessor_method = nullptr;
3703 {
3704 // Prepend "()" to type to create the full method signature.
3705 ResourceMark rm(THREAD);
3706 int sig_len = type->utf8_length() + 3; // "()" and null char
3707 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3708 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3709 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3710 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3711 }
3712
3713 if (accessor_method != nullptr) {
3714 methodHandle method(THREAD, accessor_method);
3715 oop m = Reflection::new_method(method, false, CHECK_NULL);
3716 java_lang_reflect_RecordComponent::set_accessor(element(), m);
3717 } else {
3718 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3719 }
3720
3721 int sig_index = component->generic_signature_index();
3722 if (sig_index > 0) {
3723 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3724 oop component_sig = StringTable::intern(sig, CHECK_NULL);
3725 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3726 } else {
3727 java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3728 }
3729
3730 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3731 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3732
3733 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3734 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3735
3736 return element();
3737 }
3738
3739 int reflect_ConstantPool::_oop_offset;
3740
3741 #define CONSTANTPOOL_FIELDS_DO(macro) \
3742 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3743
3744 void reflect_ConstantPool::compute_offsets() {
3745 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3746 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3747 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3748 }
3749
3750 #if INCLUDE_CDS
3751 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3752 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3753 }
3754 #endif
3755
3756 int java_lang_reflect_Parameter::_name_offset;
3757 int java_lang_reflect_Parameter::_modifiers_offset;
3758 int java_lang_reflect_Parameter::_index_offset;
3759 int java_lang_reflect_Parameter::_executable_offset;
3760
3761 #define PARAMETER_FIELDS_DO(macro) \
3762 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3763 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3764 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \
3765 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3766
3767 void java_lang_reflect_Parameter::compute_offsets() {
3768 InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3769 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3770 }
3771
3772 #if INCLUDE_CDS
3773 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3774 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3775 }
3776 #endif
3777
3778 Handle java_lang_reflect_Parameter::create(TRAPS) {
3779 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3780 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3781 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3782 InstanceKlass* ik = InstanceKlass::cast(k);
3783 // Ensure it is initialized
3784 ik->initialize(CHECK_NH);
3785 return ik->allocate_instance_handle(THREAD);
3786 }
3787
3788 oop java_lang_reflect_Parameter::name(oop param) {
3789 return param->obj_field(_name_offset);
3790 }
3791
3792 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3793 param->obj_field_put(_name_offset, value);
3794 }
3795
3796 int java_lang_reflect_Parameter::modifiers(oop param) {
3797 return param->int_field(_modifiers_offset);
3798 }
3799
3800 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3801 param->int_field_put(_modifiers_offset, value);
3802 }
3803
3804 int java_lang_reflect_Parameter::index(oop param) {
3805 return param->int_field(_index_offset);
3806 }
3807
3808 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3809 param->int_field_put(_index_offset, value);
3810 }
3811
3812 oop java_lang_reflect_Parameter::executable(oop param) {
3813 return param->obj_field(_executable_offset);
3814 }
3815
3816 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3817 param->obj_field_put(_executable_offset, value);
3818 }
3819
3820 // java_lang_Module
3821
3822 int java_lang_Module::_loader_offset;
3823 int java_lang_Module::_name_offset;
3824 int java_lang_Module::_module_entry_offset;
3825
3826 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3827 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3828 return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3829 vmSymbols::java_lang_module_init_signature(),
3830 loader, module_name, CHECK_NH);
3831 }
3832
3833 #define MODULE_FIELDS_DO(macro) \
3834 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3835 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false)
3836
3837 void java_lang_Module::compute_offsets() {
3838 InstanceKlass* k = vmClasses::Module_klass();
3839 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3840 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3841 }
3842
3843 #if INCLUDE_CDS
3844 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3845 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3846 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3847 }
3848 #endif
3849
3850 oop java_lang_Module::loader(oop module) {
3851 return module->obj_field(_loader_offset);
3852 }
3853
3854 void java_lang_Module::set_loader(oop module, oop value) {
3855 module->obj_field_put(_loader_offset, value);
3856 }
3857
3858 oop java_lang_Module::name(oop module) {
3859 return module->obj_field(_name_offset);
3860 }
3861
3862 void java_lang_Module::set_name(oop module, oop value) {
3863 module->obj_field_put(_name_offset, value);
3864 }
3865
3866 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3867 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3868 assert(module != nullptr, "module can't be null");
3869 assert(oopDesc::is_oop(module), "module must be oop");
3870
3871 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3872 return module_entry;
3873 }
3874
3875 ModuleEntry* java_lang_Module::module_entry(oop module) {
3876 ModuleEntry* module_entry = module_entry_raw(module);
3877 if (module_entry == nullptr) {
3878 // If the inject field containing the ModuleEntry* is null then return the
3879 // class loader's unnamed module.
3880 oop loader = java_lang_Module::loader(module);
3881 Handle h_loader = Handle(Thread::current(), loader);
3882 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3883 return loader_cld->unnamed_module();
3884 }
3885 return module_entry;
3886 }
3887
3888 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3889 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3890 assert(module != nullptr, "module can't be null");
3891 assert(oopDesc::is_oop(module), "module must be oop");
3892 module->address_field_put(_module_entry_offset, (address)module_entry);
3893 }
3894
3895 Handle reflect_ConstantPool::create(TRAPS) {
3896 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3897 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3898 // Ensure it is initialized
3899 k->initialize(CHECK_NH);
3900 return k->allocate_instance_handle(THREAD);
3901 }
3902
3903
3904 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3905 oop mirror = value->pool_holder()->java_mirror();
3906 // Save the mirror to get back the constant pool.
3907 reflect->obj_field_put(_oop_offset, mirror);
3908 }
3909
3910 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3911
3912 oop mirror = reflect->obj_field(_oop_offset);
3913 Klass* k = java_lang_Class::as_Klass(mirror);
3914 assert(k->is_instance_klass(), "Must be");
3915
3916 // Get the constant pool back from the klass. Since class redefinition
3917 // merges the new constant pool into the old, this is essentially the
3918 // same constant pool as the original. If constant pool merging is
3919 // no longer done in the future, this will have to change to save
3920 // the original.
3921 return InstanceKlass::cast(k)->constants();
3922 }
3923
3924
3925 // Support for java_lang_ref_Reference
3926
3927 bool java_lang_ref_Reference::_offsets_initialized;
3928
3929 int java_lang_ref_Reference::_referent_offset;
3930 int java_lang_ref_Reference::_queue_offset;
3931 int java_lang_ref_Reference::_next_offset;
3932 int java_lang_ref_Reference::_discovered_offset;
3933
3934 #define REFERENCE_FIELDS_DO(macro) \
3935 macro(_referent_offset, k, "referent", object_signature, false); \
3936 macro(_queue_offset, k, "queue", referencequeue_signature, false); \
3937 macro(_next_offset, k, "next", reference_signature, false); \
3938 macro(_discovered_offset, k, "discovered", reference_signature, false);
3939
3940 void java_lang_ref_Reference::compute_offsets() {
3941 if (_offsets_initialized) {
3942 return;
3943 }
3944 _offsets_initialized = true;
3945 InstanceKlass* k = vmClasses::Reference_klass();
3946 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3947 }
3948
3949 #if INCLUDE_CDS
3950 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3951 f->do_bool(&_offsets_initialized);
3952 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3953 }
3954 #endif
3955
3956 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3957 assert(obj != nullptr, "sanity");
3958 if (offset != _referent_offset) {
3959 return false;
3960 }
3961
3962 Klass* k = obj->klass();
3963 if (!k->is_instance_klass()) {
3964 return false;
3965 }
3966
3967 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3968 bool is_reference = ik->reference_type() != REF_NONE;
3969 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
3970 return is_reference;
3971 }
3972
3973 int java_lang_boxing_object::_value_offset;
3974 int java_lang_boxing_object::_long_value_offset;
3975
3976 #define BOXING_FIELDS_DO(macro) \
3977 macro(_value_offset, integerKlass, "value", int_signature, false); \
3978 macro(_long_value_offset, longKlass, "value", long_signature, false);
3979
3980 void java_lang_boxing_object::compute_offsets() {
3981 InstanceKlass* integerKlass = vmClasses::Integer_klass();
3982 InstanceKlass* longKlass = vmClasses::Long_klass();
3983 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3984 }
3985
3986 #if INCLUDE_CDS
3987 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
3988 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3989 }
3990 #endif
3991
3992 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3993 Klass* k = vmClasses::box_klass(type);
3994 if (k == nullptr) return nullptr;
3995 InstanceKlass* ik = InstanceKlass::cast(k);
3996 if (!ik->is_initialized()) {
3997 ik->initialize(CHECK_NULL);
3998 }
3999 return ik->allocate_instance(THREAD);
4000 }
4001
4002
4003 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
4004 oop box = initialize_and_allocate(type, CHECK_NULL);
4005 if (box == nullptr) return nullptr;
4006 switch (type) {
4007 case T_BOOLEAN:
4008 box->bool_field_put(_value_offset, value->z);
4009 break;
4010 case T_CHAR:
4011 box->char_field_put(_value_offset, value->c);
4012 break;
4013 case T_FLOAT:
4014 box->float_field_put(_value_offset, value->f);
4015 break;
4016 case T_DOUBLE:
4017 box->double_field_put(_long_value_offset, value->d);
4018 break;
4019 case T_BYTE:
4020 box->byte_field_put(_value_offset, value->b);
4021 break;
4022 case T_SHORT:
4023 box->short_field_put(_value_offset, value->s);
4024 break;
4025 case T_INT:
4026 box->int_field_put(_value_offset, value->i);
4027 break;
4028 case T_LONG:
4029 box->long_field_put(_long_value_offset, value->j);
4030 break;
4031 default:
4032 return nullptr;
4033 }
4034 return box;
4035 }
4036
4037
4038 BasicType java_lang_boxing_object::basic_type(oop box) {
4039 if (box == nullptr) return T_ILLEGAL;
4040 BasicType type = vmClasses::box_klass_type(box->klass());
4041 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
4042 return T_ILLEGAL;
4043 return type;
4044 }
4045
4046
4047 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
4048 BasicType type = vmClasses::box_klass_type(box->klass());
4049 switch (type) {
4050 case T_BOOLEAN:
4051 value->z = box->bool_field(_value_offset);
4052 break;
4053 case T_CHAR:
4054 value->c = box->char_field(_value_offset);
4055 break;
4056 case T_FLOAT:
4057 value->f = box->float_field(_value_offset);
4058 break;
4059 case T_DOUBLE:
4060 value->d = box->double_field(_long_value_offset);
4061 break;
4062 case T_BYTE:
4063 value->b = box->byte_field(_value_offset);
4064 break;
4065 case T_SHORT:
4066 value->s = box->short_field(_value_offset);
4067 break;
4068 case T_INT:
4069 value->i = box->int_field(_value_offset);
4070 break;
4071 case T_LONG:
4072 value->j = box->long_field(_long_value_offset);
4073 break;
4074 default:
4075 return T_ILLEGAL;
4076 } // end switch
4077 return type;
4078 }
4079
4080
4081 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
4082 BasicType type = vmClasses::box_klass_type(box->klass());
4083 switch (type) {
4084 case T_BOOLEAN:
4085 box->bool_field_put(_value_offset, value->z);
4086 break;
4087 case T_CHAR:
4088 box->char_field_put(_value_offset, value->c);
4089 break;
4090 case T_FLOAT:
4091 box->float_field_put(_value_offset, value->f);
4092 break;
4093 case T_DOUBLE:
4094 box->double_field_put(_long_value_offset, value->d);
4095 break;
4096 case T_BYTE:
4097 box->byte_field_put(_value_offset, value->b);
4098 break;
4099 case T_SHORT:
4100 box->short_field_put(_value_offset, value->s);
4101 break;
4102 case T_INT:
4103 box->int_field_put(_value_offset, value->i);
4104 break;
4105 case T_LONG:
4106 box->long_field_put(_long_value_offset, value->j);
4107 break;
4108 default:
4109 return T_ILLEGAL;
4110 } // end switch
4111 return type;
4112 }
4113
4114
4115 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
4116 switch (type) {
4117 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
4118 case T_CHAR: st->print("%d", value->c); break;
4119 case T_BYTE: st->print("%d", value->b); break;
4120 case T_SHORT: st->print("%d", value->s); break;
4121 case T_INT: st->print("%d", value->i); break;
4122 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
4123 case T_FLOAT: st->print("%f", value->f); break;
4124 case T_DOUBLE: st->print("%lf", value->d); break;
4125 default: st->print("type %d?", type); break;
4126 }
4127 }
4128
4129
4130 // Support for java_lang_ref_SoftReference
4131 //
4132
4133 int java_lang_ref_SoftReference::_timestamp_offset;
4134 int java_lang_ref_SoftReference::_static_clock_offset;
4135
4136 #define SOFTREFERENCE_FIELDS_DO(macro) \
4137 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
4138 macro(_static_clock_offset, k, "clock", long_signature, true)
4139
4140 void java_lang_ref_SoftReference::compute_offsets() {
4141 InstanceKlass* k = vmClasses::SoftReference_klass();
4142 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4143 }
4144
4145 #if INCLUDE_CDS
4146 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
4147 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4148 }
4149 #endif
4150
4151 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
4152 return ref->long_field(_timestamp_offset);
4153 }
4154
4155 jlong java_lang_ref_SoftReference::clock() {
4156 InstanceKlass* ik = vmClasses::SoftReference_klass();
4157 oop base = ik->static_field_base_raw();
4158 return base->long_field(_static_clock_offset);
4159 }
4160
4161 void java_lang_ref_SoftReference::set_clock(jlong value) {
4162 InstanceKlass* ik = vmClasses::SoftReference_klass();
4163 oop base = ik->static_field_base_raw();
4164 base->long_field_put(_static_clock_offset, value);
4165 }
4166
4167 // Support for java_lang_invoke_DirectMethodHandle
4168
4169 int java_lang_invoke_DirectMethodHandle::_member_offset;
4170
4171 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
4172 oop member_name = nullptr;
4173 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
4174 "a DirectMethodHandle oop is expected");
4175 return dmh->obj_field(_member_offset);
4176 }
4177
4178 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
4179 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
4180
4181 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
4182 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
4183 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4184 }
4185
4186 #if INCLUDE_CDS
4187 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
4188 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4189 }
4190 #endif
4191
4192 // Support for java_lang_invoke_MethodHandle
4193
4194 int java_lang_invoke_MethodHandle::_type_offset;
4195 int java_lang_invoke_MethodHandle::_form_offset;
4196
4197 int java_lang_invoke_MemberName::_clazz_offset;
4198 int java_lang_invoke_MemberName::_name_offset;
4199 int java_lang_invoke_MemberName::_type_offset;
4200 int java_lang_invoke_MemberName::_flags_offset;
4201 int java_lang_invoke_MemberName::_method_offset;
4202 int java_lang_invoke_MemberName::_vmindex_offset;
4203
4204 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
4205 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
4206
4207 int java_lang_invoke_LambdaForm::_vmentry_offset;
4208
4209 #define METHODHANDLE_FIELDS_DO(macro) \
4210 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4211 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
4212
4213 void java_lang_invoke_MethodHandle::compute_offsets() {
4214 InstanceKlass* k = vmClasses::MethodHandle_klass();
4215 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4216 }
4217
4218 #if INCLUDE_CDS
4219 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4220 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4221 }
4222 #endif
4223
4224 #define MEMBERNAME_FIELDS_DO(macro) \
4225 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4226 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4227 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
4228 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
4229 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
4230
4231 void java_lang_invoke_MemberName::compute_offsets() {
4232 InstanceKlass* k = vmClasses::MemberName_klass();
4233 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4234 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4235 }
4236
4237 #if INCLUDE_CDS
4238 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4239 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4240 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4241 }
4242 #endif
4243
4244 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4245 macro(_vmholder_offset, k, "vmholder", class_signature, false)
4246
4247 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4248 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4249 assert(k != nullptr, "jdk mismatch");
4250 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4251 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4252 }
4253
4254 #if INCLUDE_CDS
4255 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4256 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4257 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4258 }
4259 #endif
4260
4261 #define LAMBDAFORM_FIELDS_DO(macro) \
4262 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4263
4264 void java_lang_invoke_LambdaForm::compute_offsets() {
4265 InstanceKlass* k = vmClasses::LambdaForm_klass();
4266 assert (k != nullptr, "jdk mismatch");
4267 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4268 }
4269
4270 #if INCLUDE_CDS
4271 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4272 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4273 }
4274 #endif
4275
4276 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4277 return obj != nullptr && is_subclass(obj->klass());
4278 }
4279
4280 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4281 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4282
4283 #define NEP_FIELDS_DO(macro) \
4284 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
4285 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4286
4287 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4288 return obj != nullptr && is_subclass(obj->klass());
4289 }
4290
4291 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4292 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4293 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4294 }
4295
4296 #if INCLUDE_CDS
4297 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4298 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4299 }
4300 #endif
4301
4302 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4303 return entry->obj_field(_method_type_offset);
4304 }
4305
4306 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4307 return entry->long_field(_downcall_stub_address_offset);
4308 }
4309
4310 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4311 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4312 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4313 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4314 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4315 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4316 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4317
4318 #define ABIDescriptor_FIELDS_DO(macro) \
4319 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4320 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4321 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4322 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4323 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4324 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4325 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4326
4327 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4328 return obj != nullptr && is_subclass(obj->klass());
4329 }
4330
4331 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4332 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4333 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4334 }
4335
4336 #if INCLUDE_CDS
4337 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4338 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4339 }
4340 #endif
4341
4342 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4343 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4344 }
4345
4346 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4347 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4348 }
4349
4350 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4351 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4352 }
4353
4354 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4355 return entry->int_field(_stackAlignment_offset);
4356 }
4357
4358 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4359 return entry->int_field(_shadowSpace_offset);
4360 }
4361
4362 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4363 return entry->obj_field(_scratch1_offset);
4364 }
4365
4366 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4367 return entry->obj_field(_scratch2_offset);
4368 }
4369
4370 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4371 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4372 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4373 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4374
4375 #define VMStorage_FIELDS_DO(macro) \
4376 macro(_type_offset, k, "type", byte_signature, false); \
4377 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4378 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4379 macro(_debugName_offset, k, "debugName", string_signature, false); \
4380
4381 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4382 return obj != nullptr && is_subclass(obj->klass());
4383 }
4384
4385 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4386 InstanceKlass* k = vmClasses::VMStorage_klass();
4387 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4388 }
4389
4390 #if INCLUDE_CDS
4391 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4392 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4393 }
4394 #endif
4395
4396 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4397 return entry->byte_field(_type_offset);
4398 }
4399
4400 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4401 return entry->int_field(_indexOrOffset_offset);
4402 }
4403
4404 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4405 return entry->short_field(_segmentMaskOrSize_offset);
4406 }
4407
4408 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4409 return entry->obj_field(_debugName_offset);
4410 }
4411
4412 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4413 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4414
4415 #define CallConv_FIELDS_DO(macro) \
4416 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4417 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4418
4419 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4420 return obj != nullptr && is_subclass(obj->klass());
4421 }
4422
4423 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4424 InstanceKlass* k = vmClasses::CallConv_klass();
4425 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4426 }
4427
4428 #if INCLUDE_CDS
4429 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4430 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4431 }
4432 #endif
4433
4434 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4435 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4436 }
4437
4438 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4439 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4440 }
4441
4442 oop java_lang_invoke_MethodHandle::type(oop mh) {
4443 return mh->obj_field(_type_offset);
4444 }
4445
4446 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4447 mh->obj_field_put(_type_offset, mtype);
4448 }
4449
4450 oop java_lang_invoke_MethodHandle::form(oop mh) {
4451 assert(_form_offset != 0, "");
4452 return mh->obj_field(_form_offset);
4453 }
4454
4455 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4456 assert(_form_offset != 0, "");
4457 mh->obj_field_put(_form_offset, lform);
4458 }
4459
4460 /// MemberName accessors
4461
4462 oop java_lang_invoke_MemberName::clazz(oop mname) {
4463 assert(is_instance(mname), "wrong type");
4464 return mname->obj_field(_clazz_offset);
4465 }
4466
4467 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4468 assert(is_instance(mname), "wrong type");
4469 mname->obj_field_put(_clazz_offset, clazz);
4470 }
4471
4472 oop java_lang_invoke_MemberName::name(oop mname) {
4473 assert(is_instance(mname), "wrong type");
4474 return mname->obj_field(_name_offset);
4475 }
4476
4477 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4478 assert(is_instance(mname), "wrong type");
4479 mname->obj_field_put(_name_offset, name);
4480 }
4481
4482 oop java_lang_invoke_MemberName::type(oop mname) {
4483 assert(is_instance(mname), "wrong type");
4484 return mname->obj_field(_type_offset);
4485 }
4486
4487 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4488 assert(is_instance(mname), "wrong type");
4489 mname->obj_field_put(_type_offset, type);
4490 }
4491
4492 int java_lang_invoke_MemberName::flags(oop mname) {
4493 assert(is_instance(mname), "wrong type");
4494 return mname->int_field(_flags_offset);
4495 }
4496
4497 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4498 assert(is_instance(mname), "wrong type");
4499 mname->int_field_put(_flags_offset, flags);
4500 }
4501
4502
4503 // Return vmtarget from ResolvedMethodName method field through indirection
4504 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4505 assert(is_instance(mname), "wrong type");
4506 oop method = mname->obj_field(_method_offset);
4507 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4508 }
4509
4510 bool java_lang_invoke_MemberName::is_method(oop mname) {
4511 assert(is_instance(mname), "must be MemberName");
4512 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
4513 }
4514
4515 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4516 assert(is_instance(mname), "wrong type");
4517 mname->obj_field_put(_method_offset, resolved_method);
4518 }
4519
4520 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4521 assert(is_instance(mname), "wrong type");
4522 return (intptr_t) mname->address_field(_vmindex_offset);
4523 }
4524
4525 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4526 assert(is_instance(mname), "wrong type");
4527 mname->address_field_put(_vmindex_offset, (address) index);
4528 }
4529
4530
4531 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4532 assert(is_instance(resolved_method), "wrong type");
4533 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4534 assert(m->is_method(), "must be");
4535 return m;
4536 }
4537
4538 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4539 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4540 assert(is_instance(resolved_method), "wrong type");
4541 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4542 }
4543
4544 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4545 assert(is_instance(resolved_method), "wrong type");
4546 resolved_method->obj_field_put(_vmholder_offset, holder);
4547 }
4548
4549 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4550 const Method* method = m();
4551
4552 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4553 oop resolved_method = ResolvedMethodTable::find_method(method);
4554 if (resolved_method != nullptr) {
4555 return resolved_method;
4556 }
4557
4558 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4559 if (!k->is_initialized()) {
4560 k->initialize(CHECK_NULL);
4561 }
4562
4563 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4564
4565 NoSafepointVerifier nsv;
4566
4567 if (method->is_old()) {
4568 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4569 method->get_new_method();
4570 }
4571
4572 InstanceKlass* holder = method->method_holder();
4573
4574 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4575 // Add a reference to the loader (actually mirror because hidden classes may not have
4576 // distinct loaders) to ensure the metadata is kept alive.
4577 // This mirror may be different than the one in clazz field.
4578 set_vmholder(new_resolved_method, holder->java_mirror());
4579
4580 // Set flag in class to indicate this InstanceKlass has entries in the table
4581 // to avoid walking table during redefinition if none of the redefined classes
4582 // have any membernames in the table.
4583 holder->set_has_resolved_methods();
4584
4585 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4586 }
4587
4588 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4589 assert(is_instance(lform), "wrong type");
4590 return lform->obj_field(_vmentry_offset);
4591 }
4592
4593
4594 // Support for java_lang_invoke_MethodType
4595
4596 int java_lang_invoke_MethodType::_rtype_offset;
4597 int java_lang_invoke_MethodType::_ptypes_offset;
4598
4599 #define METHODTYPE_FIELDS_DO(macro) \
4600 macro(_rtype_offset, k, "rtype", class_signature, false); \
4601 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4602
4603 void java_lang_invoke_MethodType::compute_offsets() {
4604 InstanceKlass* k = vmClasses::MethodType_klass();
4605 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4606 }
4607
4608 #if INCLUDE_CDS
4609 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4610 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4611 }
4612 #endif
4613
4614 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4615 st->print("(");
4616 objArrayOop pts = ptypes(mt);
4617 if (pts != nullptr) {
4618 for (int i = 0, limit = pts->length(); i < limit; i++) {
4619 java_lang_Class::print_signature(pts->obj_at(i), st);
4620 }
4621 } else {
4622 st->print("null");
4623 }
4624 st->print(")");
4625 oop rt = rtype(mt);
4626 if (rt != nullptr) {
4627 java_lang_Class::print_signature(rt, st);
4628 } else {
4629 st->print("null");
4630 }
4631 }
4632
4633 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4634 ResourceMark rm;
4635 stringStream buffer(128);
4636 print_signature(mt, &buffer);
4637 const char* sigstr = buffer.base();
4638 int siglen = (int) buffer.size();
4639 Symbol *name;
4640 if (!intern_if_not_found) {
4641 name = SymbolTable::probe(sigstr, siglen);
4642 } else {
4643 name = SymbolTable::new_symbol(sigstr, siglen);
4644 }
4645 return name;
4646 }
4647
4648 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4649 if (mt1 == mt2)
4650 return true;
4651 if (rtype(mt1) != rtype(mt2))
4652 return false;
4653 if (ptype_count(mt1) != ptype_count(mt2))
4654 return false;
4655 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4656 if (ptype(mt1, i) != ptype(mt2, i))
4657 return false;
4658 }
4659 return true;
4660 }
4661
4662 oop java_lang_invoke_MethodType::rtype(oop mt) {
4663 assert(is_instance(mt), "must be a MethodType");
4664 return mt->obj_field(_rtype_offset);
4665 }
4666
4667 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4668 assert(is_instance(mt), "must be a MethodType");
4669 return (objArrayOop) mt->obj_field(_ptypes_offset);
4670 }
4671
4672 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4673 return ptypes(mt)->obj_at(idx);
4674 }
4675
4676 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4677 return ptypes(mt)->length();
4678 }
4679
4680 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4681 objArrayOop pts = ptypes(mt);
4682 int count = pts->length();
4683 int slots = 0;
4684 for (int i = 0; i < count; i++) {
4685 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4686 slots += type2size[bt];
4687 }
4688 return slots;
4689 }
4690
4691 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4692 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4693 return type2size[bt];
4694 }
4695
4696
4697 // Support for java_lang_invoke_CallSite
4698
4699 int java_lang_invoke_CallSite::_target_offset;
4700 int java_lang_invoke_CallSite::_vmdependencies_offset;
4701 int java_lang_invoke_CallSite::_last_cleanup_offset;
4702
4703 #define CALLSITE_FIELDS_DO(macro) \
4704 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
4705
4706 void java_lang_invoke_CallSite::compute_offsets() {
4707 InstanceKlass* k = vmClasses::CallSite_klass();
4708 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4709 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4710 }
4711
4712 #if INCLUDE_CDS
4713 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4714 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4715 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4716 }
4717 #endif
4718
4719 DependencyContext java_lang_invoke_CallSite::vmdependencies(oop call_site) {
4720 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4721 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4722 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4723 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4724 return dep_ctx;
4725 }
4726
4727 // Support for java_lang_invoke_ConstantCallSite
4728
4729 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4730
4731 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4732 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4733
4734 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4735 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4736 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4737 }
4738
4739 #if INCLUDE_CDS
4740 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4741 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4742 }
4743 #endif
4744
4745 // Support for java_lang_ClassLoader
4746
4747 int java_lang_ClassLoader::_loader_data_offset;
4748 int java_lang_ClassLoader::_parallelCapable_offset;
4749 int java_lang_ClassLoader::_name_offset;
4750 int java_lang_ClassLoader::_nameAndId_offset;
4751 int java_lang_ClassLoader::_unnamedModule_offset;
4752 int java_lang_ClassLoader::_parent_offset;
4753
4754 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4755 assert(loader != nullptr, "loader must not be null");
4756 assert(oopDesc::is_oop(loader), "loader must be oop");
4757 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4758 }
4759
4760 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4761 assert(loader != nullptr, "loader must not be null");
4762 assert(oopDesc::is_oop(loader), "loader must be oop");
4763 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4764 }
4765
4766 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4767 assert(loader != nullptr, "loader must not be null");
4768 assert(oopDesc::is_oop(loader), "loader must be oop");
4769 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4770 }
4771
4772 #define CLASSLOADER_FIELDS_DO(macro) \
4773 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4774 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4775 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
4776 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4777 macro(_parent_offset, k1, "parent", classloader_signature, false)
4778
4779 void java_lang_ClassLoader::compute_offsets() {
4780 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4781 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4782
4783 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4784 }
4785
4786 #if INCLUDE_CDS
4787 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4788 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4789 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4790 }
4791 #endif
4792
4793 oop java_lang_ClassLoader::parent(oop loader) {
4794 assert(is_instance(loader), "loader must be oop");
4795 return loader->obj_field(_parent_offset);
4796 }
4797
4798 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4799 assert(is_instance(loader), "loader must be oop");
4800 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4801 }
4802
4803 // Returns the name field of this class loader. If the name field has not
4804 // been set, null will be returned.
4805 oop java_lang_ClassLoader::name(oop loader) {
4806 assert(is_instance(loader), "loader must be oop");
4807 return loader->obj_field(_name_offset);
4808 }
4809
4810 // Returns the nameAndId field of this class loader. The format is
4811 // as follows:
4812 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4813 // If the defining loader has no name then <qualified-class-name> @<id>
4814 // If built-in loader, then omit '@<id>' as there is only one instance.
4815 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4816 oop java_lang_ClassLoader::nameAndId(oop loader) {
4817 assert(is_instance(loader), "loader must be oop");
4818 return loader->obj_field(_nameAndId_offset);
4819 }
4820
4821 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4822 assert(is_instance(loader), "loader must be oop");
4823 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4824 oop acl = loader;
4825 DEBUG_ONLY(jint loop_count = 0);
4826 // This loop taken verbatim from ClassLoader.java:
4827 do {
4828 acl = parent(acl);
4829 if (cl == acl) {
4830 return true;
4831 }
4832 assert(++loop_count > 0, "loop_count overflow");
4833 } while (acl != nullptr);
4834 return false;
4835 }
4836
4837 bool java_lang_ClassLoader::is_instance(oop obj) {
4838 return obj != nullptr && is_subclass(obj->klass());
4839 }
4840
4841
4842 // For class loader classes, parallelCapable defined
4843 // based on non-null field
4844 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4845 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4846 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4847 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4848 }
4849
4850 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4851 oop cl = SystemDictionary::java_system_loader();
4852 while(cl != nullptr) {
4853 if (cl == loader) return true;
4854 cl = parent(cl);
4855 }
4856 return false;
4857 }
4858
4859 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4860 assert(is_instance(loader), "loader must be oop");
4861 return loader->obj_field(_unnamedModule_offset);
4862 }
4863
4864 // Support for java_lang_System
4865 //
4866
4867 int java_lang_System::_static_in_offset;
4868 int java_lang_System::_static_out_offset;
4869 int java_lang_System::_static_err_offset;
4870
4871 #define SYSTEM_FIELDS_DO(macro) \
4872 macro(_static_in_offset, k, "in", input_stream_signature, true); \
4873 macro(_static_out_offset, k, "out", print_stream_signature, true); \
4874 macro(_static_err_offset, k, "err", print_stream_signature, true);
4875
4876 void java_lang_System::compute_offsets() {
4877 InstanceKlass* k = vmClasses::System_klass();
4878 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4879 }
4880
4881 #if INCLUDE_CDS
4882 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4883 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4884 }
4885 #endif
4886
4887 // Support for jdk_internal_misc_UnsafeConstants
4888 //
4889 class UnsafeConstantsFixup : public FieldClosure {
4890 private:
4891 int _address_size;
4892 int _page_size;
4893 bool _big_endian;
4894 bool _use_unaligned_access;
4895 int _data_cache_line_flush_size;
4896 public:
4897 UnsafeConstantsFixup() {
4898 // round up values for all static final fields
4899 _address_size = sizeof(void*);
4900 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4901 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4902 _use_unaligned_access = UseUnalignedAccesses;
4903 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4904 }
4905
4906 void do_field(fieldDescriptor* fd) {
4907 oop mirror = fd->field_holder()->java_mirror();
4908 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4909 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4910 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4911 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4912 if (fd->name() == vmSymbols::address_size_name()) {
4913 mirror->int_field_put(fd->offset(), _address_size);
4914 } else if (fd->name() == vmSymbols::page_size_name()) {
4915 mirror->int_field_put(fd->offset(), _page_size);
4916 } else if (fd->name() == vmSymbols::big_endian_name()) {
4917 mirror->bool_field_put(fd->offset(), _big_endian);
4918 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4919 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4920 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4921 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4922 } else {
4923 assert(false, "unexpected UnsafeConstants field");
4924 }
4925 }
4926 };
4927
4928 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4929 UnsafeConstantsFixup fixup;
4930 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4931 }
4932
4933
4934 // java_lang_StackTraceElement
4935
4936 int java_lang_StackTraceElement::_methodName_offset;
4937 int java_lang_StackTraceElement::_fileName_offset;
4938 int java_lang_StackTraceElement::_lineNumber_offset;
4939 int java_lang_StackTraceElement::_moduleName_offset;
4940 int java_lang_StackTraceElement::_moduleVersion_offset;
4941 int java_lang_StackTraceElement::_classLoaderName_offset;
4942 int java_lang_StackTraceElement::_declaringClass_offset;
4943 int java_lang_StackTraceElement::_declaringClassObject_offset;
4944
4945 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4946 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4947 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4948 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
4949 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4950 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
4951 macro(_methodName_offset, k, "methodName", string_signature, false); \
4952 macro(_fileName_offset, k, "fileName", string_signature, false); \
4953 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
4954
4955 // Support for java_lang_StackTraceElement
4956 void java_lang_StackTraceElement::compute_offsets() {
4957 InstanceKlass* k = vmClasses::StackTraceElement_klass();
4958 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4959 }
4960
4961 #if INCLUDE_CDS
4962 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4963 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4964 }
4965 #endif
4966
4967 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4968 element->obj_field_put(_fileName_offset, value);
4969 }
4970
4971 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4972 element->obj_field_put(_declaringClass_offset, value);
4973 }
4974
4975 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4976 element->obj_field_put(_methodName_offset, value);
4977 }
4978
4979 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4980 element->int_field_put(_lineNumber_offset, value);
4981 }
4982
4983 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4984 element->obj_field_put(_moduleName_offset, value);
4985 }
4986
4987 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4988 element->obj_field_put(_moduleVersion_offset, value);
4989 }
4990
4991 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4992 element->obj_field_put(_classLoaderName_offset, value);
4993 }
4994
4995 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4996 element->obj_field_put(_declaringClassObject_offset, value);
4997 }
4998
4999
5000 // java_lang_AssertionStatusDirectives
5001
5002 int java_lang_AssertionStatusDirectives::_classes_offset;
5003 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
5004 int java_lang_AssertionStatusDirectives::_packages_offset;
5005 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
5006 int java_lang_AssertionStatusDirectives::_deflt_offset;
5007
5008 // Support for java Assertions - java_lang_AssertionStatusDirectives.
5009 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
5010 macro(_classes_offset, k, "classes", string_array_signature, false); \
5011 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
5012 macro(_packages_offset, k, "packages", string_array_signature, false); \
5013 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
5014 macro(_deflt_offset, k, "deflt", bool_signature, false)
5015
5016 void java_lang_AssertionStatusDirectives::compute_offsets() {
5017 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
5018 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5019 }
5020
5021 #if INCLUDE_CDS
5022 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
5023 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5024 }
5025 #endif
5026
5027 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
5028 o->obj_field_put(_classes_offset, val);
5029 }
5030
5031 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
5032 o->obj_field_put(_classEnabled_offset, val);
5033 }
5034
5035 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
5036 o->obj_field_put(_packages_offset, val);
5037 }
5038
5039 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
5040 o->obj_field_put(_packageEnabled_offset, val);
5041 }
5042
5043 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
5044 o->bool_field_put(_deflt_offset, val);
5045 }
5046
5047 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
5048
5049 #define AOS_FIELDS_DO(macro) \
5050 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
5051
5052 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
5053 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
5054 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5055 }
5056
5057 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
5058 assert(_owner_offset != 0, "Must be initialized");
5059 return obj->obj_field(_owner_offset);
5060 }
5061
5062 #if INCLUDE_CDS
5063 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
5064 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5065 }
5066 #endif
5067
5068 int vector_VectorPayload::_payload_offset;
5069
5070 #define VECTORPAYLOAD_FIELDS_DO(macro) \
5071 macro(_payload_offset, k, "payload", object_signature, false)
5072
5073 void vector_VectorPayload::compute_offsets() {
5074 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
5075 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5076 }
5077
5078 #if INCLUDE_CDS
5079 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
5080 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5081 }
5082 #endif
5083
5084 void vector_VectorPayload::set_payload(oop o, oop val) {
5085 o->obj_field_put(_payload_offset, val);
5086 }
5087
5088 bool vector_VectorPayload::is_instance(oop obj) {
5089 return obj != nullptr && is_subclass(obj->klass());
5090 }
5091
5092 int java_lang_Integer_IntegerCache::_static_cache_offset;
5093 int java_lang_Long_LongCache::_static_cache_offset;
5094 int java_lang_Character_CharacterCache::_static_cache_offset;
5095 int java_lang_Short_ShortCache::_static_cache_offset;
5096 int java_lang_Byte_ByteCache::_static_cache_offset;
5097
5098 #define INTEGER_CACHE_FIELDS_DO(macro) \
5099 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5100
5101 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5102 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5103 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5104 }
5105
5106 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5107 oop base = ik->static_field_base_raw();
5108 return objArrayOop(base->obj_field(_static_cache_offset));
5109 }
5110
5111 Symbol* java_lang_Integer_IntegerCache::symbol() {
5112 return vmSymbols::java_lang_Integer_IntegerCache();
5113 }
5114
5115 #if INCLUDE_CDS
5116 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5117 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5118 }
5119 #endif
5120 #undef INTEGER_CACHE_FIELDS_DO
5121
5122 jint java_lang_Integer::value(oop obj) {
5123 jvalue v;
5124 java_lang_boxing_object::get_value(obj, &v);
5125 return v.i;
5126 }
5127
5128 #define LONG_CACHE_FIELDS_DO(macro) \
5129 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5130
5131 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5132 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5133 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5134 }
5135
5136 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5137 oop base = ik->static_field_base_raw();
5138 return objArrayOop(base->obj_field(_static_cache_offset));
5139 }
5140
5141 Symbol* java_lang_Long_LongCache::symbol() {
5142 return vmSymbols::java_lang_Long_LongCache();
5143 }
5144
5145 #if INCLUDE_CDS
5146 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5147 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5148 }
5149 #endif
5150 #undef LONG_CACHE_FIELDS_DO
5151
5152 jlong java_lang_Long::value(oop obj) {
5153 jvalue v;
5154 java_lang_boxing_object::get_value(obj, &v);
5155 return v.j;
5156 }
5157
5158 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5159 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5160
5161 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5162 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5163 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5164 }
5165
5166 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5167 oop base = ik->static_field_base_raw();
5168 return objArrayOop(base->obj_field(_static_cache_offset));
5169 }
5170
5171 Symbol* java_lang_Character_CharacterCache::symbol() {
5172 return vmSymbols::java_lang_Character_CharacterCache();
5173 }
5174
5175 #if INCLUDE_CDS
5176 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5177 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5178 }
5179 #endif
5180 #undef CHARACTER_CACHE_FIELDS_DO
5181
5182 jchar java_lang_Character::value(oop obj) {
5183 jvalue v;
5184 java_lang_boxing_object::get_value(obj, &v);
5185 return v.c;
5186 }
5187
5188 #define SHORT_CACHE_FIELDS_DO(macro) \
5189 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5190
5191 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5192 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5193 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5194 }
5195
5196 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5197 oop base = ik->static_field_base_raw();
5198 return objArrayOop(base->obj_field(_static_cache_offset));
5199 }
5200
5201 Symbol* java_lang_Short_ShortCache::symbol() {
5202 return vmSymbols::java_lang_Short_ShortCache();
5203 }
5204
5205 #if INCLUDE_CDS
5206 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5207 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5208 }
5209 #endif
5210 #undef SHORT_CACHE_FIELDS_DO
5211
5212 jshort java_lang_Short::value(oop obj) {
5213 jvalue v;
5214 java_lang_boxing_object::get_value(obj, &v);
5215 return v.s;
5216 }
5217
5218 #define BYTE_CACHE_FIELDS_DO(macro) \
5219 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5220
5221 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5222 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5223 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5224 }
5225
5226 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5227 oop base = ik->static_field_base_raw();
5228 return objArrayOop(base->obj_field(_static_cache_offset));
5229 }
5230
5231 Symbol* java_lang_Byte_ByteCache::symbol() {
5232 return vmSymbols::java_lang_Byte_ByteCache();
5233 }
5234
5235 #if INCLUDE_CDS
5236 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5237 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5238 }
5239 #endif
5240 #undef BYTE_CACHE_FIELDS_DO
5241
5242 jbyte java_lang_Byte::value(oop obj) {
5243 jvalue v;
5244 java_lang_boxing_object::get_value(obj, &v);
5245 return v.b;
5246 }
5247
5248 int java_lang_Boolean::_static_TRUE_offset;
5249 int java_lang_Boolean::_static_FALSE_offset;
5250
5251 #define BOOLEAN_FIELDS_DO(macro) \
5252 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5253 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5254
5255
5256 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5257 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5258 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5259 }
5260
5261 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5262 oop base = ik->static_field_base_raw();
5263 return base->obj_field(_static_TRUE_offset);
5264 }
5265
5266 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5267 oop base = ik->static_field_base_raw();
5268 return base->obj_field(_static_FALSE_offset);
5269 }
5270
5271 Symbol* java_lang_Boolean::symbol() {
5272 return vmSymbols::java_lang_Boolean();
5273 }
5274
5275 #if INCLUDE_CDS
5276 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5277 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5278 }
5279 #endif
5280 #undef BOOLEAN_CACHE_FIELDS_DO
5281
5282 jboolean java_lang_Boolean::value(oop obj) {
5283 jvalue v;
5284 java_lang_boxing_object::get_value(obj, &v);
5285 return v.z;
5286 }
5287
5288 // java_lang_reflect_RecordComponent
5289
5290 int java_lang_reflect_RecordComponent::_clazz_offset;
5291 int java_lang_reflect_RecordComponent::_name_offset;
5292 int java_lang_reflect_RecordComponent::_type_offset;
5293 int java_lang_reflect_RecordComponent::_accessor_offset;
5294 int java_lang_reflect_RecordComponent::_signature_offset;
5295 int java_lang_reflect_RecordComponent::_annotations_offset;
5296 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5297
5298 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5299 macro(_clazz_offset, k, "clazz", class_signature, false); \
5300 macro(_name_offset, k, "name", string_signature, false); \
5301 macro(_type_offset, k, "type", class_signature, false); \
5302 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5303 macro(_signature_offset, k, "signature", string_signature, false); \
5304 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5305 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5306
5307 // Support for java_lang_reflect_RecordComponent
5308 void java_lang_reflect_RecordComponent::compute_offsets() {
5309 InstanceKlass* k = vmClasses::RecordComponent_klass();
5310 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5311 }
5312
5313 #if INCLUDE_CDS
5314 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5315 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5316 }
5317 #endif
5318
5319 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5320 element->obj_field_put(_clazz_offset, value);
5321 }
5322
5323 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5324 element->obj_field_put(_name_offset, value);
5325 }
5326
5327 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5328 element->obj_field_put(_type_offset, value);
5329 }
5330
5331 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5332 element->obj_field_put(_accessor_offset, value);
5333 }
5334
5335 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5336 element->obj_field_put(_signature_offset, value);
5337 }
5338
5339 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5340 element->obj_field_put(_annotations_offset, value);
5341 }
5342
5343 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5344 element->obj_field_put(_typeAnnotations_offset, value);
5345 }
5346
5347 // java_lang_InternalError
5348 int java_lang_InternalError::_during_unsafe_access_offset;
5349
5350 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5351 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5352 }
5353
5354 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5355 return internal_error->bool_field(_during_unsafe_access_offset);
5356 }
5357
5358 void java_lang_InternalError::compute_offsets() {
5359 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5360 }
5361
5362 #if INCLUDE_CDS
5363 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5364 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5365 }
5366 #endif
5367
5368 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5369 f(java_lang_Class) \
5370 f(java_lang_String) \
5371 f(java_lang_ref_Reference) \
5372 //end
5373
5374 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5375 f(java_lang_System) \
5376 f(java_lang_ClassLoader) \
5377 f(java_lang_Throwable) \
5378 f(java_lang_Thread) \
5379 f(java_lang_Thread_FieldHolder) \
5380 f(java_lang_Thread_Constants) \
5381 f(java_lang_ThreadGroup) \
5382 f(java_lang_VirtualThread) \
5383 f(java_lang_InternalError) \
5384 f(java_lang_AssertionStatusDirectives) \
5385 f(java_lang_ref_SoftReference) \
5386 f(java_lang_invoke_MethodHandle) \
5387 f(java_lang_invoke_DirectMethodHandle) \
5388 f(java_lang_invoke_MemberName) \
5389 f(java_lang_invoke_ResolvedMethodName) \
5390 f(java_lang_invoke_LambdaForm) \
5391 f(java_lang_invoke_MethodType) \
5392 f(java_lang_invoke_CallSite) \
5393 f(java_lang_invoke_ConstantCallSite) \
5394 f(java_lang_reflect_AccessibleObject) \
5395 f(java_lang_reflect_Method) \
5396 f(java_lang_reflect_Constructor) \
5397 f(java_lang_reflect_Field) \
5398 f(java_lang_reflect_RecordComponent) \
5399 f(reflect_ConstantPool) \
5400 f(java_lang_reflect_Parameter) \
5401 f(java_lang_Module) \
5402 f(java_lang_StackTraceElement) \
5403 f(java_lang_ClassFrameInfo) \
5404 f(java_lang_StackFrameInfo) \
5405 f(java_lang_LiveStackFrameInfo) \
5406 f(jdk_internal_vm_ContinuationScope) \
5407 f(jdk_internal_vm_Continuation) \
5408 f(jdk_internal_vm_StackChunk) \
5409 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5410 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5411 f(jdk_internal_foreign_abi_ABIDescriptor) \
5412 f(jdk_internal_foreign_abi_VMStorage) \
5413 f(jdk_internal_foreign_abi_CallConv) \
5414 f(jdk_internal_misc_UnsafeConstants) \
5415 f(java_lang_boxing_object) \
5416 f(vector_VectorPayload) \
5417 //end
5418
5419 #define BASIC_JAVA_CLASSES_DO(f) \
5420 BASIC_JAVA_CLASSES_DO_PART1(f) \
5421 BASIC_JAVA_CLASSES_DO_PART2(f)
5422
5423 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5424
5425 // Compute field offsets of all the classes in this file
5426 void JavaClasses::compute_offsets() {
5427 if (CDSConfig::is_using_archive()) {
5428 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5429 JvmtiExport::has_early_class_hook_env()),
5430 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5431 // None of the classes used by the rest of this function can be replaced by
5432 // JVMTI ClassFileLoadHook.
5433 // We are safe to use the archived offsets, which have already been restored
5434 // by JavaClasses::serialize_offsets, without computing the offsets again.
5435 return;
5436 }
5437
5438 // We have already called the compute_offsets() of the
5439 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5440 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5441 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5442 }
5443
5444 #if INCLUDE_CDS
5445 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5446
5447 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5448 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5449 }
5450 #endif
5451
5452 #if INCLUDE_CDS_JAVA_HEAP
5453 bool JavaClasses::is_supported_for_archiving(oop obj) {
5454 Klass* klass = obj->klass();
5455
5456 if (!CDSConfig::is_dumping_method_handles()) {
5457 // These are supported by CDS only when CDSConfig::is_dumping_method_handles() is enabled.
5458 if (klass == vmClasses::ResolvedMethodName_klass() ||
5459 klass == vmClasses::MemberName_klass()) {
5460 return false;
5461 }
5462 }
5463
5464 if (!AOTReferenceObjSupport::is_enabled() && klass->is_subclass_of(vmClasses::Reference_klass())) {
5465 return false;
5466 }
5467
5468 return true;
5469 }
5470 #endif
5471
5472 #ifndef PRODUCT
5473
5474 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5475
5476 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5477 const char* field_sig) {
5478 EXCEPTION_MARK;
5479 fieldDescriptor fd;
5480 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5481 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5482 InstanceKlass* ik = InstanceKlass::cast(k);
5483 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5484 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5485 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5486 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5487 return false;
5488 }
5489 if (fd.is_static()) {
5490 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5491 return false;
5492 }
5493 if (fd.offset() == deserialized_offset ) {
5494 return true;
5495 } else {
5496 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5497 klass_name, field_name, deserialized_offset, fd.offset());
5498 return false;
5499 }
5500 }
5501
5502 void JavaClasses::check_offsets() {
5503 bool valid = true;
5504
5505 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5506 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5507
5508 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5509 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5510
5511 // Boxed primitive objects (java_lang_boxing_object)
5512
5513 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
5514 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5515 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
5516 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5517 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
5518 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
5519 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
5520 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5521
5522 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5523 }
5524
5525 #endif // PRODUCT
5526
5527 int InjectedField::compute_offset() {
5528 InstanceKlass* ik = InstanceKlass::cast(klass());
5529 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5530 if (!may_be_java && !fs.field_flags().is_injected()) {
5531 // Only look at injected fields
5532 continue;
5533 }
5534 if (fs.name() == name() && fs.signature() == signature()) {
5535 return fs.offset();
5536 }
5537 }
5538 ResourceMark rm;
5539 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)" : "");
5540 #ifndef PRODUCT
5541 ik->print();
5542 tty->print_cr("all fields:");
5543 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5544 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());
5545 }
5546 #endif //PRODUCT
5547 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5548 return -1;
5549 }
5550
5551 void javaClasses_init() {
5552 JavaClasses::compute_offsets();
5553 JavaClasses::check_offsets();
5554 FilteredFieldsMap::initialize(); // must be done after computing offsets.
5555 }