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