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