1 /*
2 * Copyright (c) 1997, 2024, 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 "precompiled.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
872 bool java_lang_Class::_offsets_computed = false;
873 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
874 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
875
876 #ifdef ASSERT
877 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
878 assert(fd->has_initial_value(), "caller should have checked this");
879 assert(fd->field_type() == T_OBJECT, "caller should have checked this");
880 assert(fd->signature() == vmSymbols::string_signature(), "just checking");
881 }
882 #endif
883
884 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
885 DEBUG_ONLY(assert_valid_static_string_field(fd);)
886 oop string = fd->string_initial_value(CHECK);
887 mirror()->obj_field_put(fd->offset(), string);
888 }
889
890 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
891 assert(fd->has_initial_value(), "caller should have checked this");
892 BasicType t = fd->field_type();
893 switch (t) {
894 case T_BYTE:
895 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value()));
896 break;
897 case T_BOOLEAN:
898 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value()));
899 break;
900 case T_CHAR:
901 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value()));
902 break;
903 case T_SHORT:
904 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value()));
905 break;
906 case T_INT:
907 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
908 break;
909 case T_FLOAT:
910 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
911 break;
912 case T_DOUBLE:
913 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
914 break;
915 case T_LONG:
916 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
917 break;
918 default:
919 // Illegal ConstantValue attribute in class file should have been
920 // caught during classfile parsing.
921 ShouldNotReachHere();
922 }
923 }
924
925 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
926 assert(mirror.not_null() && fd->is_static(), "just checking");
927 if (fd->has_initial_value()) {
928 if (fd->field_type() != T_OBJECT) {
929 initialize_static_primitive_field(fd, mirror);
930 } else {
931 initialize_static_string_field(fd, mirror, CHECK);
932 }
933 }
934 }
935
936 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
937 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
938
939 // If the offset was read from the shared archive, it was fixed up already
940 if (!k->is_shared()) {
941 if (k->is_instance_klass()) {
942 // During bootstrap, java.lang.Class wasn't loaded so static field
943 // offsets were computed without the size added it. Go back and
944 // update all the static field offsets to included the size.
945
946 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
947 // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
948 // static fields offsets are updated in this array before reencoding everything into
949 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
950
951 int java_fields;
952 int injected_fields;
953 InstanceKlass* ik = InstanceKlass::cast(k);
954 GrowableArray<FieldInfo>* fields =
955 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
956 &java_fields, &injected_fields);
957 for (int i = 0; i < fields->length(); i++) {
958 FieldInfo* fi = fields->adr_at(i);
959 if (fi->access_flags().is_static()) {
960 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
961 }
962 }
963 Array<u1>* old_stream = ik->fieldinfo_stream();
964 assert(fields->length() == (java_fields + injected_fields), "Must be");
965 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
966 ik->set_fieldinfo_stream(new_fis);
967 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
968 }
969 }
970
971 if (k->is_shared() && k->has_archived_mirror_index()) {
972 if (ArchiveHeapLoader::is_in_use()) {
973 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
974 assert(present, "Missing archived mirror for %s", k->external_name());
975 return;
976 } else {
977 k->clear_java_mirror_handle();
978 k->clear_archived_mirror_index();
979 }
980 }
981 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
982 }
983
984 void java_lang_Class::initialize_mirror_fields(Klass* k,
985 Handle mirror,
986 Handle protection_domain,
987 Handle classData,
988 TRAPS) {
989 // Allocate a simple java object for a lock.
990 // This needs to be a java object because during class initialization
991 // it can be held across a java call.
992 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
993 set_init_lock(mirror(), r);
994
995 // Set protection domain also
996 set_protection_domain(mirror(), protection_domain());
997
998 // Initialize static fields
999 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
1000
1001 // Set classData
1002 set_class_data(mirror(), classData());
1003 }
1004
1005 // Set the java.lang.Module module field in the java_lang_Class mirror
1006 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
1007 if (module.is_null()) {
1008 // During startup, the module may be null only if java.base has not been defined yet.
1009 // Put the class on the fixup_module_list to patch later when the java.lang.Module
1010 // for java.base is known. But note that since we captured the null module another
1011 // thread may have completed that initialization.
1012
1013 bool javabase_was_defined = false;
1014 {
1015 MutexLocker m1(current, Module_lock);
1016 // Keep list of classes needing java.base module fixup
1017 if (!ModuleEntryTable::javabase_defined()) {
1018 assert(k->java_mirror() != nullptr, "Class's mirror is null");
1019 k->class_loader_data()->inc_keep_alive_ref_count();
1020 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
1021 fixup_module_field_list()->push(k);
1022 } else {
1023 javabase_was_defined = true;
1024 }
1025 }
1026
1027 // If java.base was already defined then patch this particular class with java.base.
1028 if (javabase_was_defined) {
1029 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
1030 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr,
1031 "Setting class module field, " JAVA_BASE_NAME " should be defined");
1032 Handle javabase_handle(current, javabase_entry->module());
1033 set_module(mirror(), javabase_handle());
1034 }
1035 } else {
1036 assert(Universe::is_module_initialized() ||
1037 (ModuleEntryTable::javabase_defined() &&
1038 (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
1039 "Incorrect java.lang.Module specification while creating mirror");
1040 set_module(mirror(), module());
1041 }
1042 }
1043
1044 // Statically allocate fixup lists because they always get created.
1045 void java_lang_Class::allocate_fixup_lists() {
1046 GrowableArray<Klass*>* mirror_list =
1047 new (mtClass) GrowableArray<Klass*>(40, mtClass);
1048 set_fixup_mirror_list(mirror_list);
1049
1050 GrowableArray<Klass*>* module_list =
1051 new (mtModule) GrowableArray<Klass*>(500, mtModule);
1052 set_fixup_module_field_list(module_list);
1053 }
1054
1055 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
1056 Handle& mirror, Handle& comp_mirror, TRAPS) {
1057 // Allocate mirror (java.lang.Class instance)
1058 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
1059 mirror = Handle(THREAD, mirror_oop);
1060
1061 // Setup indirection from mirror->klass
1062 set_klass(mirror(), k);
1063
1064 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
1065 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
1066
1067 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
1068
1069 // It might also have a component mirror. This mirror must already exist.
1070 if (k->is_array_klass()) {
1071 if (k->is_typeArray_klass()) {
1072 BasicType type = TypeArrayKlass::cast(k)->element_type();
1073 if (is_scratch) {
1074 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
1075 } else {
1076 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
1077 }
1078 } else {
1079 assert(k->is_objArray_klass(), "Must be");
1080 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1081 assert(element_klass != nullptr, "Must have an element klass");
1082 if (is_scratch) {
1083 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1084 } else {
1085 comp_mirror = Handle(THREAD, element_klass->java_mirror());
1086 }
1087 }
1088 assert(comp_mirror() != nullptr, "must have a mirror");
1089
1090 // Two-way link between the array klass and its component mirror:
1091 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1092 set_component_mirror(mirror(), comp_mirror());
1093 // See below for ordering dependencies between field array_klass in component mirror
1094 // and java_mirror in this klass.
1095 } else {
1096 assert(k->is_instance_klass(), "Must be");
1097
1098 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD);
1099 if (HAS_PENDING_EXCEPTION) {
1100 // If any of the fields throws an exception like OOM remove the klass field
1101 // from the mirror so GC doesn't follow it after the klass has been deallocated.
1102 // This mirror looks like a primitive type, which logically it is because it
1103 // it represents no class.
1104 set_klass(mirror(), nullptr);
1105 return;
1106 }
1107 }
1108 }
1109
1110 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1111 Handle module, Handle protection_domain,
1112 Handle classData, TRAPS) {
1113 assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1114 assert(k->java_mirror() == nullptr, "should only assign mirror once");
1115
1116 // Use this moment of initialization to cache modifier_flags also,
1117 // to support Class.getModifiers(). Instance classes recalculate
1118 // the cached flags after the class file is parsed, but before the
1119 // class is put into the system dictionary.
1120 int computed_modifiers = k->compute_modifier_flags();
1121 k->set_modifier_flags(computed_modifiers);
1122 // Class_klass has to be loaded because it is used to allocate
1123 // the mirror.
1124 if (vmClasses::Class_klass_loaded()) {
1125 Handle mirror;
1126 Handle comp_mirror;
1127
1128 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1129
1130 // set the classLoader field in the java_lang_Class instance
1131 assert(class_loader() == k->class_loader(), "should be same");
1132 set_class_loader(mirror(), class_loader());
1133
1134 // Setup indirection from klass->mirror
1135 // after any exceptions can happen during allocations.
1136 k->set_java_mirror(mirror);
1137
1138 // Set the module field in the java_lang_Class instance. This must be done
1139 // after the mirror is set.
1140 set_mirror_module_field(THREAD, k, mirror, module);
1141
1142 if (comp_mirror() != nullptr) {
1143 // Set after k->java_mirror() is published, because compiled code running
1144 // concurrently doesn't expect a k to have a null java_mirror.
1145 release_set_array_klass(comp_mirror(), k);
1146 }
1147 if (CDSConfig::is_dumping_heap()) {
1148 create_scratch_mirror(k, CHECK);
1149 }
1150 } else {
1151 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1152 fixup_mirror_list()->push(k);
1153 }
1154 }
1155
1156 #if INCLUDE_CDS_JAVA_HEAP
1157 // The "scratch mirror" stores the states of the mirror object that can be
1158 // decided at dump time (such as the initial values of the static fields, the
1159 // component mirror, etc). At runtime, more information is added to it by
1160 // java_lang_Class::restore_archived_mirror().
1161 //
1162 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1163 // produces the same result as /*runtime*/create_mirror().
1164 //
1165 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1166 // latter may contain dumptime-specific information that cannot be archived
1167 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1168 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1169 if (k->class_loader() != nullptr &&
1170 k->class_loader() != SystemDictionary::java_platform_loader() &&
1171 k->class_loader() != SystemDictionary::java_system_loader()) {
1172 // We only archive the mirrors of classes loaded by the built-in loaders
1173 return;
1174 }
1175
1176 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1177 Handle mirror;
1178 Handle comp_mirror;
1179 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1180
1181 if (comp_mirror() != nullptr) {
1182 release_set_array_klass(comp_mirror(), k);
1183 }
1184
1185 HeapShared::set_scratch_java_mirror(k, mirror());
1186 }
1187
1188 // Returns true if the mirror is updated, false if no archived mirror
1189 // data is present. After the archived mirror object is restored, the
1190 // shared klass' _has_raw_archived_mirror flag is cleared.
1191 bool java_lang_Class::restore_archived_mirror(Klass *k,
1192 Handle class_loader, Handle module,
1193 Handle protection_domain, TRAPS) {
1194 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1195 // see more details in vmClasses::resolve_all().
1196 if (!vmClasses::Class_klass_loaded()) {
1197 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1198 fixup_mirror_list()->push(k);
1199 return true;
1200 }
1201
1202 oop m = k->archived_java_mirror();
1203 assert(m != nullptr, "must have stored non-null archived mirror");
1204
1205 // Sanity: clear it now to prevent re-initialization if any of the following fails
1206 k->clear_archived_mirror_index();
1207
1208 // mirror is archived, restore
1209 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1210 assert(as_Klass(m) == k, "must be");
1211 Handle mirror(THREAD, m);
1212
1213 if (!k->is_array_klass()) {
1214 // - local static final fields with initial values were initialized at dump time
1215
1216 // create the init_lock
1217 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1218 set_init_lock(mirror(), r);
1219
1220 if (protection_domain.not_null()) {
1221 set_protection_domain(mirror(), protection_domain());
1222 }
1223 }
1224
1225 assert(class_loader() == k->class_loader(), "should be same");
1226 if (class_loader.not_null()) {
1227 set_class_loader(mirror(), class_loader());
1228 }
1229
1230 k->set_java_mirror(mirror);
1231
1232 set_mirror_module_field(THREAD, k, mirror, module);
1233
1234 if (log_is_enabled(Trace, cds, heap, mirror)) {
1235 ResourceMark rm(THREAD);
1236 log_trace(cds, heap, mirror)(
1237 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1238 }
1239
1240 return true;
1241 }
1242 #endif // INCLUDE_CDS_JAVA_HEAP
1243
1244 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1245 assert(_module_offset != 0, "must have been computed already");
1246 set_module(k->java_mirror(), module());
1247 }
1248
1249 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1250 assert(_oop_size_offset != 0, "must be set");
1251 assert(size > 0, "Oop size must be greater than zero, not " SIZE_FORMAT, size);
1252 assert(size <= INT_MAX, "Lossy conversion: " SIZE_FORMAT, size);
1253 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1254 }
1255
1256 int java_lang_Class::static_oop_field_count(oop java_class) {
1257 assert(_static_oop_field_count_offset != 0, "must be set");
1258 return java_class->int_field(_static_oop_field_count_offset);
1259 }
1260
1261 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1262 assert(_static_oop_field_count_offset != 0, "must be set");
1263 java_class->int_field_put(_static_oop_field_count_offset, size);
1264 }
1265
1266 oop java_lang_Class::protection_domain(oop java_class) {
1267 assert(_protection_domain_offset != 0, "must be set");
1268 return java_class->obj_field(_protection_domain_offset);
1269 }
1270 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1271 assert(_protection_domain_offset != 0, "must be set");
1272 java_class->obj_field_put(_protection_domain_offset, pd);
1273 }
1274
1275 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1276 assert(_component_mirror_offset != 0, "must be set");
1277 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1278 }
1279 oop java_lang_Class::component_mirror(oop java_class) {
1280 assert(_component_mirror_offset != 0, "must be set");
1281 return java_class->obj_field(_component_mirror_offset);
1282 }
1283
1284 oop java_lang_Class::init_lock(oop java_class) {
1285 assert(_init_lock_offset != 0, "must be set");
1286 return java_class->obj_field(_init_lock_offset);
1287 }
1288 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1289 assert(_init_lock_offset != 0, "must be set");
1290 java_class->obj_field_put(_init_lock_offset, init_lock);
1291 }
1292
1293 objArrayOop java_lang_Class::signers(oop java_class) {
1294 assert(_signers_offset != 0, "must be set");
1295 return (objArrayOop)java_class->obj_field(_signers_offset);
1296 }
1297
1298 oop java_lang_Class::class_data(oop java_class) {
1299 assert(_classData_offset != 0, "must be set");
1300 return java_class->obj_field(_classData_offset);
1301 }
1302 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1303 assert(_classData_offset != 0, "must be set");
1304 java_class->obj_field_put(_classData_offset, class_data);
1305 }
1306
1307 void java_lang_Class::set_reflection_data(oop java_class, oop reflection_data) {
1308 assert(_reflectionData_offset != 0, "must be set");
1309 java_class->obj_field_put(_reflectionData_offset, reflection_data);
1310 }
1311
1312 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1313 assert(_class_loader_offset != 0, "offsets should have been initialized");
1314 java_class->obj_field_put(_class_loader_offset, loader);
1315 }
1316
1317 oop java_lang_Class::class_loader(oop java_class) {
1318 assert(_class_loader_offset != 0, "must be set");
1319 return java_class->obj_field(_class_loader_offset);
1320 }
1321
1322 oop java_lang_Class::module(oop java_class) {
1323 assert(_module_offset != 0, "must be set");
1324 return java_class->obj_field(_module_offset);
1325 }
1326
1327 void java_lang_Class::set_module(oop java_class, oop module) {
1328 assert(_module_offset != 0, "must be set");
1329 java_class->obj_field_put(_module_offset, module);
1330 }
1331
1332 oop java_lang_Class::name(Handle java_class, TRAPS) {
1333 assert(_name_offset != 0, "must be set");
1334 oop o = java_class->obj_field(_name_offset);
1335 if (o == nullptr) {
1336 o = StringTable::intern(as_external_name(java_class()), THREAD);
1337 java_class->obj_field_put(_name_offset, o);
1338 }
1339 return o;
1340 }
1341
1342 oop java_lang_Class::source_file(oop java_class) {
1343 assert(_source_file_offset != 0, "must be set");
1344 return java_class->obj_field(_source_file_offset);
1345 }
1346
1347 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1348 assert(_source_file_offset != 0, "must be set");
1349 java_class->obj_field_put(_source_file_offset, source_file);
1350 }
1351
1352 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1353 // This should be improved by adding a field at the Java level or by
1354 // introducing a new VM klass (see comment in ClassFileParser)
1355 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1356 if (type != T_VOID) {
1357 Klass* aklass = Universe::typeArrayKlass(type);
1358 assert(aklass != nullptr, "correct bootstrap");
1359 release_set_array_klass(java_class, aklass);
1360 }
1361 #ifdef ASSERT
1362 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1363 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1364 #endif
1365 return java_class;
1366 }
1367
1368 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1369 assert(is_instance(java_class), "must be a Class object");
1370 java_class->metadata_field_put(_klass_offset, klass);
1371 }
1372
1373
1374 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1375 assert(is_instance(java_class), "must be a Class object");
1376 Symbol* name = nullptr;
1377 bool is_instance = false;
1378 if (is_primitive(java_class)) {
1379 name = vmSymbols::type_signature(primitive_type(java_class));
1380 } else {
1381 Klass* k = as_Klass(java_class);
1382 is_instance = k->is_instance_klass();
1383 name = k->name();
1384 }
1385 if (name == nullptr) {
1386 st->print("<null>");
1387 return;
1388 }
1389 if (is_instance) st->print("L");
1390 st->write((char*) name->base(), (int) name->utf8_length());
1391 if (is_instance) st->print(";");
1392 }
1393
1394 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1395 assert(is_instance(java_class), "must be a Class object");
1396 Symbol* name;
1397 if (is_primitive(java_class)) {
1398 name = vmSymbols::type_signature(primitive_type(java_class));
1399 // Because this can create a new symbol, the caller has to decrement
1400 // the refcount, so make adjustment here and below for symbols returned
1401 // that are not created or incremented due to a successful lookup.
1402 name->increment_refcount();
1403 } else {
1404 Klass* k = as_Klass(java_class);
1405 if (!k->is_instance_klass()) {
1406 name = k->name();
1407 name->increment_refcount();
1408 } else {
1409 ResourceMark rm;
1410 const char* sigstr = k->signature_name();
1411 int siglen = (int) strlen(sigstr);
1412 if (!intern_if_not_found) {
1413 name = SymbolTable::probe(sigstr, siglen);
1414 } else {
1415 name = SymbolTable::new_symbol(sigstr, siglen);
1416 }
1417 }
1418 }
1419 return name;
1420 }
1421
1422 // Returns the Java name for this Java mirror (Resource allocated)
1423 // See Klass::external_name().
1424 // For primitive type Java mirrors, its type name is returned.
1425 const char* java_lang_Class::as_external_name(oop java_class) {
1426 assert(is_instance(java_class), "must be a Class object");
1427 const char* name = nullptr;
1428 if (is_primitive(java_class)) {
1429 name = type2name(primitive_type(java_class));
1430 } else {
1431 name = as_Klass(java_class)->external_name();
1432 }
1433 if (name == nullptr) {
1434 name = "<null>";
1435 }
1436 return name;
1437 }
1438
1439 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1440 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1441 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass");
1442 return k;
1443 }
1444
1445
1446 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1447 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1448 java_class->release_metadata_field_put(_array_klass_offset, klass);
1449 }
1450
1451
1452 BasicType java_lang_Class::primitive_type(oop java_class) {
1453 assert(is_primitive(java_class), "just checking");
1454 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1455 BasicType type = T_VOID;
1456 if (ak != nullptr) {
1457 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1458 type = ArrayKlass::cast(ak)->element_type();
1459 } else {
1460 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1461 }
1462 #ifdef ASSERT
1463 if (CDSConfig::is_dumping_heap()) {
1464 oop mirror = Universe::java_mirror(type);
1465 oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1466 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1467 } else {
1468 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1469 }
1470 #endif
1471 return type;
1472 }
1473
1474 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1475 assert(is_instance(java_class), "must be a Class object");
1476 if (is_primitive(java_class)) {
1477 if (reference_klass != nullptr)
1478 (*reference_klass) = nullptr;
1479 return primitive_type(java_class);
1480 } else {
1481 if (reference_klass != nullptr)
1482 (*reference_klass) = as_Klass(java_class);
1483 return T_OBJECT;
1484 }
1485 }
1486
1487
1488 oop java_lang_Class::primitive_mirror(BasicType t) {
1489 oop mirror = Universe::java_mirror(t);
1490 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1491 assert(is_primitive(mirror), "must be primitive");
1492 return mirror;
1493 }
1494
1495 #define CLASS_FIELDS_DO(macro) \
1496 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1497 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1498 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1499 macro(_module_offset, k, "module", module_signature, false); \
1500 macro(_name_offset, k, "name", string_signature, false); \
1501 macro(_classData_offset, k, "classData", object_signature, false); \
1502 macro(_reflectionData_offset, k, "reflectionData", java_lang_ref_SoftReference_signature, false); \
1503 macro(_signers_offset, k, "signers", object_array_signature, false);
1504
1505 void java_lang_Class::compute_offsets() {
1506 if (_offsets_computed) {
1507 return;
1508 }
1509
1510 _offsets_computed = true;
1511
1512 InstanceKlass* k = vmClasses::Class_klass();
1513 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1514 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1515 }
1516
1517 #if INCLUDE_CDS
1518 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1519 f->do_bool(&_offsets_computed);
1520
1521 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1522
1523 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1524 }
1525 #endif
1526
1527 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1528 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1529 return the_class_mirror->int_field(_classRedefinedCount_offset);
1530 }
1531
1532 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1533 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1534 the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1535 }
1536
1537
1538 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1539 // platform thread structure, and a eetop offset which was used for thread
1540 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1541 // merged, so in the HotSpot VM we just use the eetop field for the thread
1542 // instead of the privateInfo_offset.
1543 //
1544 // Note: The stackSize field is only present starting in 1.4.
1545
1546 int java_lang_Thread_FieldHolder::_group_offset;
1547 int java_lang_Thread_FieldHolder::_priority_offset;
1548 int java_lang_Thread_FieldHolder::_stackSize_offset;
1549 int java_lang_Thread_FieldHolder::_daemon_offset;
1550 int java_lang_Thread_FieldHolder::_thread_status_offset;
1551
1552 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1553 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1554 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1555 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1556 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1557 macro(_thread_status_offset, k, "threadStatus", int_signature, false)
1558
1559 void java_lang_Thread_FieldHolder::compute_offsets() {
1560 assert(_group_offset == 0, "offsets should be initialized only once");
1561
1562 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1563 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1564 }
1565
1566 #if INCLUDE_CDS
1567 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1568 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1569 }
1570 #endif
1571
1572 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1573 return holder->obj_field(_group_offset);
1574 }
1575
1576 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1577 return (ThreadPriority)holder->int_field(_priority_offset);
1578 }
1579
1580 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1581 holder->int_field_put(_priority_offset, priority);
1582 }
1583
1584 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1585 return holder->long_field(_stackSize_offset);
1586 }
1587
1588 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1589 return holder->bool_field(_daemon_offset) != 0;
1590 }
1591
1592 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1593 assert(val, "daemon status is never turned off");
1594 holder->bool_field_put(_daemon_offset, val);
1595 }
1596
1597 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1598 holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1599 }
1600
1601 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1602 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1603 }
1604
1605
1606 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1607
1608 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1609 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true);
1610
1611 void java_lang_Thread_Constants::compute_offsets() {
1612 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1613
1614 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1615 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1616 }
1617
1618 #if INCLUDE_CDS
1619 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1620 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1621 }
1622 #endif
1623
1624 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1625 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1626 oop base = k->static_field_base_raw();
1627 return base->obj_field(_static_VTHREAD_GROUP_offset);
1628 }
1629
1630
1631 int java_lang_Thread::_holder_offset;
1632 int java_lang_Thread::_name_offset;
1633 int java_lang_Thread::_contextClassLoader_offset;
1634 int java_lang_Thread::_eetop_offset;
1635 int java_lang_Thread::_jvmti_thread_state_offset;
1636 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1637 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1638 int java_lang_Thread::_interrupted_offset;
1639 int java_lang_Thread::_interruptLock_offset;
1640 int java_lang_Thread::_tid_offset;
1641 int java_lang_Thread::_continuation_offset;
1642 int java_lang_Thread::_park_blocker_offset;
1643 int java_lang_Thread::_scopedValueBindings_offset;
1644 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1645
1646 #define THREAD_FIELDS_DO(macro) \
1647 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \
1648 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1649 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1650 macro(_eetop_offset, k, "eetop", long_signature, false); \
1651 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1652 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \
1653 macro(_tid_offset, k, "tid", long_signature, false); \
1654 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1655 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1656 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1657
1658 void java_lang_Thread::compute_offsets() {
1659 assert(_holder_offset == 0, "offsets should be initialized only once");
1660
1661 InstanceKlass* k = vmClasses::Thread_klass();
1662 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1663 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1664 }
1665
1666 #if INCLUDE_CDS
1667 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1668 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1669 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1670 }
1671 #endif
1672
1673 JavaThread* java_lang_Thread::thread(oop java_thread) {
1674 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1675 }
1676
1677 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1678 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1679 }
1680
1681 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1682 java_thread->address_field_put(_eetop_offset, (address)thread);
1683 }
1684
1685 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1686 java_thread->release_address_field_put(_eetop_offset, (address)thread);
1687 }
1688
1689 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1690 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1691 }
1692
1693 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1694 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1695 }
1696
1697 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1698 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1699 }
1700
1701 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1702 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1703 int val = VTMS_transition_disable_count(java_thread);
1704 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1705 }
1706
1707 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1708 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1709 int val = VTMS_transition_disable_count(java_thread);
1710 assert(val > 0, "VTMS_transition_disable_count should never be negative");
1711 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1712 }
1713
1714 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1715 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1716 }
1717
1718 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1719 assert(is_in_VTMS_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside");
1720 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1721 }
1722
1723 int java_lang_Thread::is_in_VTMS_transition_offset() {
1724 return _jvmti_is_in_VTMS_transition_offset;
1725 }
1726
1727 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1728 assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1729 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1730 }
1731
1732 oop java_lang_Thread::holder(oop java_thread) {
1733 // Note: may return null if the thread is still attaching
1734 return java_thread->obj_field(_holder_offset);
1735 }
1736 oop java_lang_Thread::interrupt_lock(oop java_thread) {
1737 return java_thread->obj_field(_interruptLock_offset);
1738 }
1739
1740 bool java_lang_Thread::interrupted(oop java_thread) {
1741 // Make sure the caller can safely access oops.
1742 assert(Thread::current()->is_VM_thread() ||
1743 (JavaThread::current()->thread_state() != _thread_blocked &&
1744 JavaThread::current()->thread_state() != _thread_in_native),
1745 "Unsafe access to oop");
1746 return java_thread->bool_field_volatile(_interrupted_offset);
1747 }
1748
1749 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1750 // Make sure the caller can safely access oops.
1751 assert(Thread::current()->is_VM_thread() ||
1752 (JavaThread::current()->thread_state() != _thread_blocked &&
1753 JavaThread::current()->thread_state() != _thread_in_native),
1754 "Unsafe access to oop");
1755 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1756 }
1757
1758
1759 oop java_lang_Thread::name(oop java_thread) {
1760 return java_thread->obj_field(_name_offset);
1761 }
1762
1763
1764 void java_lang_Thread::set_name(oop java_thread, oop name) {
1765 java_thread->obj_field_put(_name_offset, name);
1766 }
1767
1768 // Convenience macros for setting and getting Thread fields that
1769 // are actually stored in the FieldHolder object of the thread.
1770 // The FieldHolder can be null whilst a thread is attaching via
1771 // JNI, and when the main thread is attaching.
1772
1773 // The default value should be the default/zero initialized value
1774 // of the field as it would be in java.lang.Thread.FieldHolder.
1775 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \
1776 { \
1777 oop holder = java_lang_Thread::holder(java_thread); \
1778 if (holder != nullptr) \
1779 return java_lang_Thread_FieldHolder::field(holder); \
1780 else \
1781 return default_val; \
1782 }
1783
1784 // We should never be trying to set a field of an attaching thread.
1785 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \
1786 { \
1787 oop holder = java_lang_Thread::holder(java_thread); \
1788 assert(holder != nullptr, "Thread not fully initialized"); \
1789 java_lang_Thread_FieldHolder::set_##field(holder, value); \
1790 }
1791
1792
1793 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1794 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1795 }
1796
1797
1798 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1799 SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1800 }
1801
1802
1803 oop java_lang_Thread::threadGroup(oop java_thread) {
1804 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1805 }
1806
1807
1808 bool java_lang_Thread::is_alive(oop java_thread) {
1809 JavaThread* thr = java_lang_Thread::thread(java_thread);
1810 return (thr != nullptr);
1811 }
1812
1813
1814 bool java_lang_Thread::is_daemon(oop java_thread) {
1815 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1816 }
1817
1818
1819 void java_lang_Thread::set_daemon(oop java_thread) {
1820 SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1821 }
1822
1823 oop java_lang_Thread::context_class_loader(oop java_thread) {
1824 return java_thread->obj_field(_contextClassLoader_offset);
1825 }
1826
1827
1828 jlong java_lang_Thread::stackSize(oop java_thread) {
1829 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1830 }
1831
1832 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1833 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1834 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1835 }
1836
1837 // Read thread status value from threadStatus field in java.lang.Thread java class.
1838 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1839 // Make sure the caller is operating on behalf of the VM or is
1840 // running VM code (state == _thread_in_vm).
1841 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1842 JavaThread::current()->thread_state() == _thread_in_vm,
1843 "Java Thread is not running in vm");
1844 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1845 }
1846
1847 ByteSize java_lang_Thread::thread_id_offset() {
1848 return in_ByteSize(_tid_offset);
1849 }
1850
1851 oop java_lang_Thread::park_blocker(oop java_thread) {
1852 return java_thread->obj_field(_park_blocker_offset);
1853 }
1854
1855 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) {
1856 ThreadsListHandle tlh(JavaThread::current());
1857 JavaThread* thread;
1858 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread);
1859 if (is_virtual) {
1860 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread);
1861 if (carrier_thread == nullptr) {
1862 return nullptr;
1863 }
1864 thread = java_lang_Thread::thread(carrier_thread);
1865 } else {
1866 thread = java_lang_Thread::thread(java_thread);
1867 }
1868 if (thread == nullptr) {
1869 return nullptr;
1870 }
1871
1872 class GetStackTraceClosure : public HandshakeClosure {
1873 public:
1874 const Handle _java_thread;
1875 int _depth;
1876 bool _retry_handshake;
1877 GrowableArray<Method*>* _methods;
1878 GrowableArray<int>* _bcis;
1879
1880 GetStackTraceClosure(Handle java_thread) :
1881 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false),
1882 _methods(nullptr), _bcis(nullptr) {
1883 }
1884 ~GetStackTraceClosure() {
1885 delete _methods;
1886 delete _bcis;
1887 }
1888
1889 bool read_reset_retry() {
1890 bool ret = _retry_handshake;
1891 // If we re-execute the handshake this method need to return false
1892 // when the handshake cannot be performed. (E.g. thread terminating)
1893 _retry_handshake = false;
1894 return ret;
1895 }
1896
1897 void do_thread(Thread* th) {
1898 if (!Thread::current()->is_Java_thread()) {
1899 _retry_handshake = true;
1900 return;
1901 }
1902
1903 JavaThread* thread = JavaThread::cast(th);
1904
1905 if (!thread->has_last_Java_frame()) {
1906 return;
1907 }
1908
1909 bool carrier = false;
1910 if (java_lang_VirtualThread::is_instance(_java_thread())) {
1911 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
1912 const ContinuationEntry* ce = thread->vthread_continuation();
1913 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) {
1914 return; // not mounted
1915 }
1916 } else {
1917 carrier = (thread->vthread_continuation() != nullptr);
1918 }
1919
1920 const int max_depth = MaxJavaStackTraceDepth;
1921 const bool skip_hidden = !ShowHiddenFrames;
1922
1923 // Pick minimum length that will cover most cases
1924 int init_length = 64;
1925 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1926 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
1927
1928 int total_count = 0;
1929 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops
1930 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
1931 vfst.next()) {
1932
1933 if (skip_hidden && (vfst.method()->is_hidden() ||
1934 vfst.method()->is_continuation_enter_intrinsic())) {
1935 continue;
1936 }
1937
1938 _methods->push(vfst.method());
1939 _bcis->push(vfst.bci());
1940 total_count++;
1941 }
1942
1943 _depth = total_count;
1944 }
1945 };
1946
1947 // Handshake with target
1948 ResourceMark rm(THREAD);
1949 HandleMark hm(THREAD);
1950 GetStackTraceClosure gstc(Handle(THREAD, java_thread));
1951 do {
1952 Handshake::execute(&gstc, &tlh, thread);
1953 } while (gstc.read_reset_retry());
1954
1955 // Stop if no stack trace is found.
1956 if (gstc._depth == 0) {
1957 return nullptr;
1958 }
1959
1960 // Convert to StackTraceElement array
1961 InstanceKlass* k = vmClasses::StackTraceElement_klass();
1962 assert(k != nullptr, "must be loaded in 1.4+");
1963 if (k->should_be_initialized()) {
1964 k->initialize(CHECK_NULL);
1965 }
1966 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL);
1967
1968 for (int i = 0; i < gstc._depth; i++) {
1969 methodHandle method(THREAD, gstc._methods->at(i));
1970 oop element = java_lang_StackTraceElement::create(method,
1971 gstc._bcis->at(i),
1972 CHECK_NULL);
1973 trace->obj_at_put(i, element);
1974 }
1975
1976 return trace();
1977 }
1978
1979 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1980 JavaThreadStatus status = get_thread_status(java_thread);
1981 switch (status) {
1982 case JavaThreadStatus::NEW : return "NEW";
1983 case JavaThreadStatus::RUNNABLE : return "RUNNABLE";
1984 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)";
1985 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1986 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1987 case JavaThreadStatus::PARKED : return "WAITING (parking)";
1988 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)";
1989 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1990 case JavaThreadStatus::TERMINATED : return "TERMINATED";
1991 default : return "UNKNOWN";
1992 };
1993 }
1994 int java_lang_ThreadGroup::_parent_offset;
1995 int java_lang_ThreadGroup::_name_offset;
1996 int java_lang_ThreadGroup::_maxPriority_offset;
1997 int java_lang_ThreadGroup::_daemon_offset;
1998
1999 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
2000 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2001 return java_thread_group->obj_field(_parent_offset);
2002 }
2003
2004 // ("name as oop" accessor is not necessary)
2005
2006 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
2007 oop name = java_thread_group->obj_field(_name_offset);
2008 // ThreadGroup.name can be null
2009 if (name != nullptr) {
2010 return java_lang_String::as_utf8_string(name);
2011 }
2012 return nullptr;
2013 }
2014
2015 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
2016 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2017 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
2018 }
2019
2020 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
2021 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2022 return java_thread_group->bool_field(_daemon_offset) != 0;
2023 }
2024
2025 #define THREADGROUP_FIELDS_DO(macro) \
2026 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
2027 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
2028 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
2029 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false);
2030
2031 void java_lang_ThreadGroup::compute_offsets() {
2032 assert(_parent_offset == 0, "offsets should be initialized only once");
2033
2034 InstanceKlass* k = vmClasses::ThreadGroup_klass();
2035 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2036 }
2037
2038 #if INCLUDE_CDS
2039 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
2040 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2041 }
2042 #endif
2043
2044
2045 // java_lang_VirtualThread
2046
2047 int java_lang_VirtualThread::static_vthread_scope_offset;
2048 int java_lang_VirtualThread::_carrierThread_offset;
2049 int java_lang_VirtualThread::_continuation_offset;
2050 int java_lang_VirtualThread::_state_offset;
2051 int java_lang_VirtualThread::_next_offset;
2052 int java_lang_VirtualThread::_onWaitingList_offset;
2053 int java_lang_VirtualThread::_notified_offset;
2054 int java_lang_VirtualThread::_timeout_offset;
2055
2056 #define VTHREAD_FIELDS_DO(macro) \
2057 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \
2058 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \
2059 macro(_continuation_offset, k, "cont", continuation_signature, false); \
2060 macro(_state_offset, k, "state", int_signature, false); \
2061 macro(_next_offset, k, "next", vthread_signature, false); \
2062 macro(_onWaitingList_offset, k, "onWaitingList", bool_signature, false); \
2063 macro(_notified_offset, k, "notified", bool_signature, false); \
2064 macro(_timeout_offset, k, "timeout", long_signature, false);
2065
2066
2067 void java_lang_VirtualThread::compute_offsets() {
2068 InstanceKlass* k = vmClasses::VirtualThread_klass();
2069 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2070 }
2071
2072 bool java_lang_VirtualThread::is_instance(oop obj) {
2073 return obj != nullptr && is_subclass(obj->klass());
2074 }
2075
2076 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
2077 oop thread = vthread->obj_field(_carrierThread_offset);
2078 return thread;
2079 }
2080
2081 oop java_lang_VirtualThread::continuation(oop vthread) {
2082 oop cont = vthread->obj_field(_continuation_offset);
2083 return cont;
2084 }
2085
2086 int java_lang_VirtualThread::state(oop vthread) {
2087 return vthread->int_field_acquire(_state_offset);
2088 }
2089
2090 void java_lang_VirtualThread::set_state(oop vthread, int state) {
2091 vthread->release_int_field_put(_state_offset, state);
2092 }
2093
2094 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) {
2095 jint* addr = vthread->field_addr<jint>(_state_offset);
2096 int res = Atomic::cmpxchg(addr, old_state, new_state);
2097 return res;
2098 }
2099
2100 oop java_lang_VirtualThread::next(oop vthread) {
2101 return vthread->obj_field(_next_offset);
2102 }
2103
2104 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) {
2105 vthread->obj_field_put(_next_offset, next_vthread);
2106 }
2107
2108 // Add vthread to the waiting list if it's not already in it. Multiple threads
2109 // could be trying to add vthread to the list at the same time, so we control
2110 // access with a cmpxchg on onWaitingList. The winner adds vthread to the list.
2111 // Method returns true if we added vthread to the list, false otherwise.
2112 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) {
2113 jboolean* addr = vthread->field_addr<jboolean>(_onWaitingList_offset);
2114 jboolean vthread_on_list = Atomic::load(addr);
2115 if (!vthread_on_list) {
2116 vthread_on_list = Atomic::cmpxchg(addr, (jboolean)JNI_FALSE, (jboolean)JNI_TRUE);
2117 if (!vthread_on_list) {
2118 for (;;) {
2119 oop head = list_head.resolve();
2120 java_lang_VirtualThread::set_next(vthread, head);
2121 if (list_head.cmpxchg(head, vthread) == head) return true;
2122 }
2123 }
2124 }
2125 return false; // already on waiting list
2126 }
2127
2128 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) {
2129 vthread->bool_field_put_volatile(_notified_offset, value);
2130 }
2131
2132 jlong java_lang_VirtualThread::timeout(oop vthread) {
2133 return vthread->long_field(_timeout_offset);
2134 }
2135
2136 void java_lang_VirtualThread::set_timeout(oop vthread, jlong value) {
2137 vthread->long_field_put(_timeout_offset, value);
2138 }
2139
2140 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2141 JavaThreadStatus status = JavaThreadStatus::NEW;
2142 switch (state & ~SUSPENDED) {
2143 case NEW:
2144 status = JavaThreadStatus::NEW;
2145 break;
2146 case STARTED:
2147 case RUNNING:
2148 case PARKING:
2149 case TIMED_PARKING:
2150 case UNPARKED:
2151 case YIELDING:
2152 case YIELDED:
2153 case UNBLOCKED:
2154 case WAITING:
2155 case TIMED_WAITING:
2156 status = JavaThreadStatus::RUNNABLE;
2157 break;
2158 case PARKED:
2159 case PINNED:
2160 status = JavaThreadStatus::PARKED;
2161 break;
2162 case TIMED_PARKED:
2163 case TIMED_PINNED:
2164 status = JavaThreadStatus::PARKED_TIMED;
2165 break;
2166 case BLOCKING:
2167 case BLOCKED:
2168 status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER;
2169 break;
2170 case WAIT:
2171 status = JavaThreadStatus::IN_OBJECT_WAIT;
2172 break;
2173 case TIMED_WAIT:
2174 status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED;
2175 break;
2176 case TERMINATED:
2177 status = JavaThreadStatus::TERMINATED;
2178 break;
2179 default:
2180 ShouldNotReachHere();
2181 }
2182 return status;
2183 }
2184
2185 bool java_lang_VirtualThread::is_preempted(oop vthread) {
2186 oop continuation = java_lang_VirtualThread::continuation(vthread);
2187 assert(continuation != nullptr, "vthread with no continuation");
2188 stackChunkOop chunk = jdk_internal_vm_Continuation::tail(continuation);
2189 return chunk != nullptr && chunk->preempted();
2190 }
2191
2192 #if INCLUDE_CDS
2193 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2194 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2195 }
2196 #endif
2197
2198 // java_lang_Throwable
2199
2200 int java_lang_Throwable::_backtrace_offset;
2201 int java_lang_Throwable::_detailMessage_offset;
2202 int java_lang_Throwable::_stackTrace_offset;
2203 int java_lang_Throwable::_depth_offset;
2204 int java_lang_Throwable::_cause_offset;
2205 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2206
2207 #define THROWABLE_FIELDS_DO(macro) \
2208 macro(_backtrace_offset, k, "backtrace", object_signature, false); \
2209 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \
2210 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2211 macro(_depth_offset, k, "depth", int_signature, false); \
2212 macro(_cause_offset, k, "cause", throwable_signature, false); \
2213 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2214
2215 void java_lang_Throwable::compute_offsets() {
2216 InstanceKlass* k = vmClasses::Throwable_klass();
2217 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2218 }
2219
2220 #if INCLUDE_CDS
2221 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2222 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2223 }
2224 #endif
2225
2226 oop java_lang_Throwable::unassigned_stacktrace() {
2227 InstanceKlass* ik = vmClasses::Throwable_klass();
2228 oop base = ik->static_field_base_raw();
2229 return base->obj_field(_static_unassigned_stacktrace_offset);
2230 }
2231
2232 oop java_lang_Throwable::backtrace(oop throwable) {
2233 return throwable->obj_field_acquire(_backtrace_offset);
2234 }
2235
2236
2237 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2238 throwable->release_obj_field_put(_backtrace_offset, value);
2239 }
2240
2241 int java_lang_Throwable::depth(oop throwable) {
2242 return throwable->int_field(_depth_offset);
2243 }
2244
2245 void java_lang_Throwable::set_depth(oop throwable, int value) {
2246 throwable->int_field_put(_depth_offset, value);
2247 }
2248
2249 oop java_lang_Throwable::message(oop throwable) {
2250 return throwable->obj_field(_detailMessage_offset);
2251 }
2252
2253 const char* java_lang_Throwable::message_as_utf8(oop throwable) {
2254 oop msg = java_lang_Throwable::message(throwable);
2255 const char* msg_utf8 = nullptr;
2256 if (msg != nullptr) {
2257 msg_utf8 = java_lang_String::as_utf8_string(msg);
2258 }
2259 return msg_utf8;
2260 }
2261
2262 oop java_lang_Throwable::cause(oop throwable) {
2263 return throwable->obj_field(_cause_offset);
2264 }
2265
2266 void java_lang_Throwable::set_message(oop throwable, oop value) {
2267 throwable->obj_field_put(_detailMessage_offset, value);
2268 }
2269
2270
2271 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2272 throwable->obj_field_put(_stackTrace_offset, st_element_array);
2273 }
2274
2275 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2276 set_stacktrace(throwable, nullptr);
2277 }
2278
2279
2280 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2281 ResourceMark rm;
2282 Klass* k = throwable->klass();
2283 assert(k != nullptr, "just checking");
2284 st->print("%s", k->external_name());
2285 oop msg = message(throwable);
2286 if (msg != nullptr) {
2287 st->print(": %s", java_lang_String::as_utf8_string(msg));
2288 }
2289 }
2290
2291 // After this many redefines, the stack trace is unreliable.
2292 const int MAX_VERSION = USHRT_MAX;
2293
2294 static inline bool version_matches(Method* method, int version) {
2295 assert(version < MAX_VERSION, "version is too big");
2296 return method != nullptr && (method->constants()->version() == version);
2297 }
2298
2299 // This class provides a simple wrapper over the internal structure of
2300 // exception backtrace to insulate users of the backtrace from needing
2301 // to know what it looks like.
2302 // The code of this class is not GC safe. Allocations can only happen
2303 // in expand().
2304 class BacktraceBuilder: public StackObj {
2305 friend class BacktraceIterator;
2306 private:
2307 Handle _backtrace;
2308 objArrayOop _head;
2309 typeArrayOop _methods;
2310 typeArrayOop _bcis;
2311 objArrayOop _mirrors;
2312 typeArrayOop _names; // Needed to insulate method name against redefinition.
2313 // True if the top frame of the backtrace is omitted because it shall be hidden.
2314 bool _has_hidden_top_frame;
2315 int _index;
2316 NoSafepointVerifier _nsv;
2317
2318 enum {
2319 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2320 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2321 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2322 trace_names_offset = java_lang_Throwable::trace_names_offset,
2323 trace_conts_offset = java_lang_Throwable::trace_conts_offset,
2324 trace_next_offset = java_lang_Throwable::trace_next_offset,
2325 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2326 trace_size = java_lang_Throwable::trace_size,
2327 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2328 };
2329
2330 // get info out of chunks
2331 static typeArrayOop get_methods(objArrayHandle chunk) {
2332 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2333 assert(methods != nullptr, "method array should be initialized in backtrace");
2334 return methods;
2335 }
2336 static typeArrayOop get_bcis(objArrayHandle chunk) {
2337 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2338 assert(bcis != nullptr, "bci array should be initialized in backtrace");
2339 return bcis;
2340 }
2341 static objArrayOop get_mirrors(objArrayHandle chunk) {
2342 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2343 assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2344 return mirrors;
2345 }
2346 static typeArrayOop get_names(objArrayHandle chunk) {
2347 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2348 assert(names != nullptr, "names array should be initialized in backtrace");
2349 return names;
2350 }
2351 static bool has_hidden_top_frame(objArrayHandle chunk) {
2352 oop hidden = chunk->obj_at(trace_hidden_offset);
2353 return hidden != nullptr;
2354 }
2355
2356 public:
2357
2358 // constructor for new backtrace
2359 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2360 expand(CHECK);
2361 _backtrace = Handle(THREAD, _head);
2362 _index = 0;
2363 }
2364
2365 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2366 _methods = get_methods(backtrace);
2367 _bcis = get_bcis(backtrace);
2368 _mirrors = get_mirrors(backtrace);
2369 _names = get_names(backtrace);
2370 _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2371 assert(_methods->length() == _bcis->length() &&
2372 _methods->length() == _mirrors->length() &&
2373 _mirrors->length() == _names->length(),
2374 "method and source information arrays should match");
2375
2376 // head is the preallocated backtrace
2377 _head = backtrace();
2378 _backtrace = Handle(thread, _head);
2379 _index = 0;
2380 }
2381
2382 void expand(TRAPS) {
2383 objArrayHandle old_head(THREAD, _head);
2384 PauseNoSafepointVerifier pnsv(&_nsv);
2385
2386 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2387 objArrayHandle new_head(THREAD, head);
2388
2389 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2390 typeArrayHandle new_methods(THREAD, methods);
2391
2392 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2393 typeArrayHandle new_bcis(THREAD, bcis);
2394
2395 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2396 objArrayHandle new_mirrors(THREAD, mirrors);
2397
2398 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2399 typeArrayHandle new_names(THREAD, names);
2400
2401 if (!old_head.is_null()) {
2402 old_head->obj_at_put(trace_next_offset, new_head());
2403 }
2404 new_head->obj_at_put(trace_methods_offset, new_methods());
2405 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2406 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2407 new_head->obj_at_put(trace_names_offset, new_names());
2408 new_head->obj_at_put(trace_hidden_offset, nullptr);
2409
2410 _head = new_head();
2411 _methods = new_methods();
2412 _bcis = new_bcis();
2413 _mirrors = new_mirrors();
2414 _names = new_names();
2415 _index = 0;
2416 }
2417
2418 oop backtrace() {
2419 return _backtrace();
2420 }
2421
2422 inline void push(Method* method, int bci, TRAPS) {
2423 // Smear the -1 bci to 0 since the array only holds unsigned
2424 // shorts. The later line number lookup would just smear the -1
2425 // to a 0 even if it could be recorded.
2426 if (bci == SynchronizationEntryBCI) bci = 0;
2427
2428 if (_index >= trace_chunk_size) {
2429 methodHandle mhandle(THREAD, method);
2430 expand(CHECK);
2431 method = mhandle();
2432 }
2433
2434 _methods->ushort_at_put(_index, method->orig_method_idnum());
2435 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2436
2437 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2438 // klass owning the symbols alive so their refcounts aren't decremented.
2439 Symbol* name = method->name();
2440 _names->symbol_at_put(_index, name);
2441
2442 // We need to save the mirrors in the backtrace to keep the class
2443 // from being unloaded while we still have this stack trace.
2444 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2445 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2446
2447 _index++;
2448 }
2449
2450 void set_has_hidden_top_frame() {
2451 if (!_has_hidden_top_frame) {
2452 // It would be nice to add java/lang/Boolean::TRUE here
2453 // to indicate that this backtrace has a hidden top frame.
2454 // But this code is used before TRUE is allocated.
2455 // Therefore let's just use an arbitrary legal oop
2456 // available right here. _methods is a short[].
2457 assert(_methods != nullptr, "we need a legal oop");
2458 _has_hidden_top_frame = true;
2459 _head->obj_at_put(trace_hidden_offset, _methods);
2460 }
2461 }
2462 };
2463
2464 struct BacktraceElement : public StackObj {
2465 int _method_id;
2466 int _bci;
2467 int _version;
2468 Symbol* _name;
2469 Handle _mirror;
2470 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2471 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2472 };
2473
2474 class BacktraceIterator : public StackObj {
2475 int _index;
2476 objArrayHandle _result;
2477 objArrayHandle _mirrors;
2478 typeArrayHandle _methods;
2479 typeArrayHandle _bcis;
2480 typeArrayHandle _names;
2481
2482 void init(objArrayHandle result, Thread* thread) {
2483 // Get method id, bci, version and mirror from chunk
2484 _result = result;
2485 if (_result.not_null()) {
2486 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2487 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2488 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2489 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2490 _index = 0;
2491 }
2492 }
2493 public:
2494 BacktraceIterator(objArrayHandle result, Thread* thread) {
2495 init(result, thread);
2496 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2497 }
2498
2499 BacktraceElement next(Thread* thread) {
2500 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2501 _methods->ushort_at(_index),
2502 Backtrace::version_at(_bcis->int_at(_index)),
2503 Backtrace::bci_at(_bcis->int_at(_index)),
2504 _names->symbol_at(_index));
2505 _index++;
2506
2507 if (_index >= java_lang_Throwable::trace_chunk_size) {
2508 int next_offset = java_lang_Throwable::trace_next_offset;
2509 // Get next chunk
2510 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2511 init(result, thread);
2512 }
2513 return e;
2514 }
2515
2516 bool repeat() {
2517 return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2518 }
2519 };
2520
2521
2522 // Print stack trace element to resource allocated buffer
2523 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2524 int version, int bci, Symbol* name) {
2525 ResourceMark rm;
2526
2527 // Get strings and string lengths
2528 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2529 const char* klass_name = holder->external_name();
2530 int buf_len = (int)strlen(klass_name);
2531
2532 char* method_name = name->as_C_string();
2533 buf_len += (int)strlen(method_name);
2534
2535 char* source_file_name = nullptr;
2536 Symbol* source = Backtrace::get_source_file_name(holder, version);
2537 if (source != nullptr) {
2538 source_file_name = source->as_C_string();
2539 buf_len += (int)strlen(source_file_name);
2540 }
2541
2542 char *module_name = nullptr, *module_version = nullptr;
2543 ModuleEntry* module = holder->module();
2544 if (module->is_named()) {
2545 module_name = module->name()->as_C_string();
2546 buf_len += (int)strlen(module_name);
2547 if (module->version() != nullptr) {
2548 module_version = module->version()->as_C_string();
2549 buf_len += (int)strlen(module_version);
2550 }
2551 }
2552
2553 // Allocate temporary buffer with extra space for formatting and line number
2554 const size_t buf_size = buf_len + 64;
2555 char* buf = NEW_RESOURCE_ARRAY(char, buf_size);
2556
2557 // Print stack trace line in buffer
2558 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name);
2559
2560 // Print module information
2561 if (module_name != nullptr) {
2562 if (module_version != nullptr) {
2563 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version);
2564 } else {
2565 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name);
2566 }
2567 }
2568
2569 // The method can be null if the requested class version is gone
2570 Method* method = holder->method_with_orig_idnum(method_id, version);
2571 if (!version_matches(method, version)) {
2572 strcat(buf, "Redefined)");
2573 } else {
2574 int line_number = Backtrace::get_line_number(method, bci);
2575 if (line_number == -2) {
2576 strcat(buf, "Native Method)");
2577 } else {
2578 if (source_file_name != nullptr && (line_number != -1)) {
2579 // Sourcename and linenumber
2580 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number);
2581 } else if (source_file_name != nullptr) {
2582 // Just sourcename
2583 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name);
2584 } else {
2585 // Neither sourcename nor linenumber
2586 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)");
2587 }
2588 nmethod* nm = method->code();
2589 if (WizardMode && nm != nullptr) {
2590 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2591 }
2592 }
2593 }
2594
2595 st->print_cr("%s", buf);
2596 }
2597
2598 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2599 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2600 int method_id = method->orig_method_idnum();
2601 int version = method->constants()->version();
2602 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2603 }
2604
2605 /**
2606 * Print the throwable message and its stack trace plus all causes by walking the
2607 * cause chain. The output looks the same as of Throwable.printStackTrace().
2608 */
2609 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2610 // First, print the message.
2611 print(throwable(), st);
2612 st->cr();
2613
2614 // Now print the stack trace.
2615 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2616 while (throwable.not_null()) {
2617 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2618 if (result.is_null()) {
2619 st->print_raw_cr("\t<<no stack trace available>>");
2620 return;
2621 }
2622 BacktraceIterator iter(result, THREAD);
2623
2624 while (iter.repeat()) {
2625 BacktraceElement bte = iter.next(THREAD);
2626 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2627 }
2628 if (THREAD->can_call_java()) {
2629 // Call getCause() which doesn't necessarily return the _cause field.
2630 ExceptionMark em(THREAD);
2631 JavaValue cause(T_OBJECT);
2632 JavaCalls::call_virtual(&cause,
2633 throwable,
2634 throwable->klass(),
2635 vmSymbols::getCause_name(),
2636 vmSymbols::void_throwable_signature(),
2637 THREAD);
2638 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2639 if (HAS_PENDING_EXCEPTION) {
2640 CLEAR_PENDING_EXCEPTION;
2641 throwable = Handle();
2642 } else {
2643 throwable = Handle(THREAD, cause.get_oop());
2644 if (throwable.not_null()) {
2645 st->print("Caused by: ");
2646 print(throwable(), st);
2647 st->cr();
2648 }
2649 }
2650 } else {
2651 st->print_raw_cr("<<cannot call Java to get cause>>");
2652 return;
2653 }
2654 }
2655 }
2656
2657 /**
2658 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2659 */
2660 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2661 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2662 JavaValue result(T_VOID);
2663 JavaCalls::call_virtual(&result,
2664 throwable,
2665 vmClasses::Throwable_klass(),
2666 vmSymbols::printStackTrace_name(),
2667 vmSymbols::void_method_signature(),
2668 THREAD);
2669 }
2670
2671 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2672 if (!StackTraceInThrowable) return;
2673 ResourceMark rm(THREAD);
2674
2675 // Start out by clearing the backtrace for this object, in case the VM
2676 // runs out of memory while allocating the stack trace
2677 set_backtrace(throwable(), nullptr);
2678 // Clear lazily constructed Java level stacktrace if refilling occurs
2679 // This is unnecessary in 1.7+ but harmless
2680 clear_stacktrace(throwable());
2681
2682 int max_depth = MaxJavaStackTraceDepth;
2683 JavaThread* thread = THREAD;
2684
2685 BacktraceBuilder bt(CHECK);
2686
2687 // If there is no Java frame just return the method that was being called
2688 // with bci 0
2689 if (!thread->has_last_Java_frame()) {
2690 if (max_depth >= 1 && method() != nullptr) {
2691 bt.push(method(), 0, CHECK);
2692 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2693 set_depth(throwable(), 1);
2694 set_backtrace(throwable(), bt.backtrace());
2695 }
2696 return;
2697 }
2698
2699 // Instead of using vframe directly, this version of fill_in_stack_trace
2700 // basically handles everything by hand. This significantly improved the
2701 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2702 // See bug 6333838 for more details.
2703 // The "ASSERT" here is to verify this method generates the exactly same stack
2704 // trace as utilizing vframe.
2705 #ifdef ASSERT
2706 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2707 #endif
2708 int total_count = 0;
2709 RegisterMap map(thread,
2710 RegisterMap::UpdateMap::skip,
2711 RegisterMap::ProcessFrames::skip,
2712 RegisterMap::WalkContinuation::include);
2713 int decode_offset = 0;
2714 nmethod* nm = nullptr;
2715 bool skip_fillInStackTrace_check = false;
2716 bool skip_throwableInit_check = false;
2717 bool skip_hidden = !ShowHiddenFrames;
2718 bool show_carrier = ShowCarrierFrames;
2719 ContinuationEntry* cont_entry = thread->last_continuation();
2720 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2721 Method* method = nullptr;
2722 int bci = 0;
2723
2724 // Compiled java method case.
2725 if (decode_offset != 0) {
2726 DebugInfoReadStream stream(nm, decode_offset);
2727 decode_offset = stream.read_int();
2728 method = (Method*)nm->metadata_at(stream.read_int());
2729 bci = stream.read_bci();
2730 } else {
2731 if (fr.is_first_frame()) break;
2732
2733 if (Continuation::is_continuation_enterSpecial(fr)) {
2734 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2735 if (!show_carrier && cont_entry->is_virtual_thread()) {
2736 break;
2737 }
2738 cont_entry = cont_entry->parent();
2739 }
2740
2741 address pc = fr.pc();
2742 if (fr.is_interpreted_frame()) {
2743 address bcp;
2744 if (!map.in_cont()) {
2745 bcp = fr.interpreter_frame_bcp();
2746 method = fr.interpreter_frame_method();
2747 } else {
2748 bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2749 method = map.stack_chunk()->interpreter_frame_method(fr);
2750 }
2751 bci = method->bci_from(bcp);
2752 fr = fr.sender(&map);
2753 } else {
2754 CodeBlob* cb = fr.cb();
2755 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2756 // but non nmethod
2757 fr = fr.sender(&map);
2758 if (cb == nullptr || !cb->is_nmethod()) {
2759 continue;
2760 }
2761 nm = cb->as_nmethod();
2762 assert(nm->method() != nullptr, "must be");
2763 if (nm->method()->is_native()) {
2764 method = nm->method();
2765 bci = 0;
2766 } else {
2767 PcDesc* pd = nm->pc_desc_at(pc);
2768 decode_offset = pd->scope_decode_offset();
2769 // if decode_offset is not equal to 0, it will execute the
2770 // "compiled java method case" at the beginning of the loop.
2771 continue;
2772 }
2773 }
2774 }
2775 #ifdef ASSERT
2776 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2777 assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2778 st.next();
2779 }
2780 #endif
2781
2782 // the format of the stacktrace will be:
2783 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2784 // - 0 or more <init> methods for the exception class (skipped)
2785 // - rest of the stack
2786
2787 if (!skip_fillInStackTrace_check) {
2788 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2789 throwable->is_a(method->method_holder())) {
2790 continue;
2791 }
2792 else {
2793 skip_fillInStackTrace_check = true; // gone past them all
2794 }
2795 }
2796 if (!skip_throwableInit_check) {
2797 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2798
2799 // skip <init> methods of the exception class and superclasses
2800 // This is similar to classic VM.
2801 if (method->name() == vmSymbols::object_initializer_name() &&
2802 throwable->is_a(method->method_holder())) {
2803 continue;
2804 } else {
2805 // there are none or we've seen them all - either way stop checking
2806 skip_throwableInit_check = true;
2807 }
2808 }
2809 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2810 if (skip_hidden) {
2811 if (total_count == 0) {
2812 // The top frame will be hidden from the stack trace.
2813 bt.set_has_hidden_top_frame();
2814 }
2815 continue;
2816 }
2817 }
2818
2819 bt.push(method, bci, CHECK);
2820 total_count++;
2821 }
2822
2823 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2824
2825 // Put completed stack trace into throwable object
2826 set_backtrace(throwable(), bt.backtrace());
2827 set_depth(throwable(), total_count);
2828 }
2829
2830 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2831 // No-op if stack trace is disabled
2832 if (!StackTraceInThrowable) {
2833 return;
2834 }
2835
2836 // Disable stack traces for some preallocated out of memory errors
2837 if (!Universe::should_fill_in_stack_trace(throwable)) {
2838 return;
2839 }
2840
2841 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2842 PreserveExceptionMark pm(THREAD);
2843
2844 fill_in_stack_trace(throwable, method, THREAD);
2845 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2846 // original exception via the PreserveExceptionMark destructor.
2847 CLEAR_PENDING_EXCEPTION;
2848 }
2849
2850 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2851 // Allocate stack trace - backtrace is created but not filled in
2852
2853 // No-op if stack trace is disabled
2854 if (!StackTraceInThrowable) return;
2855 BacktraceBuilder bt(CHECK); // creates a backtrace
2856 set_backtrace(throwable(), bt.backtrace());
2857 }
2858
2859
2860 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2861 // Fill in stack trace into preallocated backtrace (no GC)
2862
2863 // No-op if stack trace is disabled
2864 if (!StackTraceInThrowable) return;
2865
2866 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2867
2868 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2869
2870 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2871 assert(backtrace.not_null(), "backtrace should have been preallocated");
2872
2873 ResourceMark rm(THREAD);
2874 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2875
2876 BacktraceBuilder bt(THREAD, backtrace);
2877
2878 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2879 // methods as preallocated errors aren't created by "java" code.
2880
2881 // fill in as much stack trace as possible
2882 int chunk_count = 0;
2883 for (;!st.at_end(); st.next()) {
2884 bt.push(st.method(), st.bci(), CHECK);
2885 chunk_count++;
2886
2887 // Bail-out for deep stacks
2888 if (chunk_count >= trace_chunk_size) break;
2889 }
2890 set_depth(throwable(), chunk_count);
2891 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2892
2893 // We support the Throwable immutability protocol defined for Java 7.
2894 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2895 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2896 }
2897
2898 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2899 objArrayHandle stack_trace_array_h, TRAPS) {
2900
2901 if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2902 THROW(vmSymbols::java_lang_NullPointerException());
2903 }
2904
2905 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2906
2907 if (stack_trace_array_h->length() != depth) {
2908 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2909 }
2910
2911 objArrayHandle result(THREAD, objArrayOop(backtrace()));
2912 BacktraceIterator iter(result, THREAD);
2913
2914 int index = 0;
2915 while (iter.repeat()) {
2916 BacktraceElement bte = iter.next(THREAD);
2917
2918 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2919
2920 if (stack_trace_element.is_null()) {
2921 THROW(vmSymbols::java_lang_NullPointerException());
2922 }
2923
2924 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2925 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2926
2927 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2928 method,
2929 bte._version,
2930 bte._bci,
2931 bte._name,
2932 CHECK);
2933 }
2934 }
2935
2936 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
2937 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
2938 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
2939 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
2940 // symbolic stacktrace of 'throwable'.
2941 assert(throwable.not_null(), "shouldn't be");
2942
2943 // Now create the message from the original exception and thread name.
2944 ResourceMark rm(current);
2945 const char *message = nullptr;
2946 oop detailed_message = java_lang_Throwable::message(throwable());
2947 if (detailed_message != nullptr) {
2948 message = java_lang_String::as_utf8_string(detailed_message);
2949 }
2950 stringStream st;
2951 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
2952 message == nullptr ? "" : ":");
2953 if (message == nullptr) {
2954 st.print("[in thread \"%s\"]", current->name());
2955 } else {
2956 st.print("%s [in thread \"%s\"]", message, current->name());
2957 }
2958
2959 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
2960 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
2961 // If new_exception returns a different exception while creating the exception,
2962 // abandon the attempt to save the initialization error and return null.
2963 if (init_error->klass()->name() != exception_name) {
2964 log_info(class, init)("Exception %s thrown while saving initialization exception",
2965 init_error->klass()->external_name());
2966 return Handle();
2967 }
2968
2969 // Call to java to fill in the stack trace and clear declaringClassObject to
2970 // not keep classes alive in the stack trace.
2971 // call this: public StackTraceElement[] getStackTrace()
2972 JavaValue result(T_ARRAY);
2973 JavaCalls::call_virtual(&result, throwable,
2974 vmClasses::Throwable_klass(),
2975 vmSymbols::getStackTrace_name(),
2976 vmSymbols::getStackTrace_signature(),
2977 current);
2978 if (!current->has_pending_exception()){
2979 Handle stack_trace(current, result.get_oop());
2980 assert(stack_trace->is_objArray(), "Should be an array");
2981 java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
2982 // Clear backtrace because the stacktrace should be used instead.
2983 set_backtrace(init_error(), nullptr);
2984 } else {
2985 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
2986 init_error->klass()->external_name());
2987 current->clear_pending_exception();
2988 }
2989
2990 return init_error;
2991 }
2992
2993 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
2994 JavaThread* current = JavaThread::current();
2995 objArrayHandle result(current, objArrayOop(backtrace(throwable)));
2996 BacktraceIterator iter(result, current);
2997 // No backtrace available.
2998 if (!iter.repeat()) return false;
2999
3000 // If the exception happened in a frame that has been hidden, i.e.,
3001 // omitted from the back trace, we can not compute the message.
3002 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
3003 if (hidden != nullptr) {
3004 return false;
3005 }
3006
3007 // Get first backtrace element.
3008 BacktraceElement bte = iter.next(current);
3009
3010 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
3011 assert(holder != nullptr, "first element should be non-null");
3012 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
3013
3014 // Original version is no longer available.
3015 if (m == nullptr || !version_matches(m, bte._version)) {
3016 return false;
3017 }
3018
3019 *method = m;
3020 *bci = bte._bci;
3021 return true;
3022 }
3023
3024 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
3025 // Allocate java.lang.StackTraceElement instance
3026 InstanceKlass* k = vmClasses::StackTraceElement_klass();
3027 assert(k != nullptr, "must be loaded in 1.4+");
3028 if (k->should_be_initialized()) {
3029 k->initialize(CHECK_NULL);
3030 }
3031
3032 Handle element = k->allocate_instance_handle(CHECK_NULL);
3033
3034 int version = method->constants()->version();
3035 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
3036 return element();
3037 }
3038
3039 void java_lang_StackTraceElement::fill_in(Handle element,
3040 InstanceKlass* holder, const methodHandle& method,
3041 int version, int bci, Symbol* name, TRAPS) {
3042 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
3043
3044 ResourceMark rm(THREAD);
3045 HandleMark hm(THREAD);
3046
3047 // Fill in class name
3048 Handle java_class(THREAD, holder->java_mirror());
3049 oop classname = java_lang_Class::name(java_class, CHECK);
3050 java_lang_StackTraceElement::set_declaringClass(element(), classname);
3051 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
3052
3053 oop loader = holder->class_loader();
3054 if (loader != nullptr) {
3055 oop loader_name = java_lang_ClassLoader::name(loader);
3056 if (loader_name != nullptr)
3057 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
3058 }
3059
3060 // Fill in method name
3061 oop methodname = StringTable::intern(name, CHECK);
3062 java_lang_StackTraceElement::set_methodName(element(), methodname);
3063
3064 // Fill in module name and version
3065 ModuleEntry* module = holder->module();
3066 if (module->is_named()) {
3067 oop module_name = StringTable::intern(module->name(), CHECK);
3068 java_lang_StackTraceElement::set_moduleName(element(), module_name);
3069 oop module_version;
3070 if (module->version() != nullptr) {
3071 module_version = StringTable::intern(module->version(), CHECK);
3072 } else {
3073 module_version = nullptr;
3074 }
3075 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
3076 }
3077
3078 if (method() == nullptr || !version_matches(method(), version)) {
3079 // The method was redefined, accurate line number information isn't available
3080 java_lang_StackTraceElement::set_fileName(element(), nullptr);
3081 java_lang_StackTraceElement::set_lineNumber(element(), -1);
3082 } else {
3083 Symbol* source;
3084 oop source_file;
3085 int line_number;
3086 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
3087
3088 java_lang_StackTraceElement::set_fileName(element(), source_file);
3089 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
3090 }
3091 }
3092
3093 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
3094 InstanceKlass* holder,
3095 int version,
3096 const methodHandle& method,
3097 int bci,
3098 Symbol*& source,
3099 oop& source_file,
3100 int& line_number, TRAPS) {
3101 // Fill in source file name and line number.
3102 source = Backtrace::get_source_file_name(holder, version);
3103 source_file = java_lang_Class::source_file(java_class());
3104 if (source != nullptr) {
3105 // Class was not redefined. We can trust its cache if set,
3106 // else we have to initialize it.
3107 if (source_file == nullptr) {
3108 source_file = StringTable::intern(source, CHECK);
3109 java_lang_Class::set_source_file(java_class(), source_file);
3110 }
3111 } else {
3112 // Class was redefined. Dump the cache if it was set.
3113 if (source_file != nullptr) {
3114 source_file = nullptr;
3115 java_lang_Class::set_source_file(java_class(), source_file);
3116 }
3117 }
3118 line_number = Backtrace::get_line_number(method(), bci);
3119 }
3120
3121 #if INCLUDE_JVMCI
3122 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
3123 Symbol*& filename, int& line_number, TRAPS) {
3124 ResourceMark rm(THREAD);
3125 HandleMark hm(THREAD);
3126
3127 filename = nullptr;
3128 line_number = -1;
3129
3130 oop source_file;
3131 int version = method->constants()->version();
3132 InstanceKlass* holder = method->method_holder();
3133 Handle java_class(THREAD, holder->java_mirror());
3134 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
3135 }
3136 #endif // INCLUDE_JVMCI
3137
3138 // java_lang_ClassFrameInfo
3139
3140 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
3141 int java_lang_ClassFrameInfo::_flags_offset;
3142
3143 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
3144 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \
3145 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false)
3146
3147 void java_lang_ClassFrameInfo::compute_offsets() {
3148 InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
3149 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3150 }
3151
3152 #if INCLUDE_CDS
3153 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
3154 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3155 }
3156 #endif
3157
3158 static int get_flags(const methodHandle& m) {
3159 int flags = (jushort)( m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS );
3160 if (m->is_object_initializer()) {
3161 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR;
3162 } else {
3163 // Note: Static initializers can be here. Record them as plain methods.
3164 flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
3165 }
3166 if (m->caller_sensitive()) {
3167 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
3168 }
3169 if (m->is_hidden()) {
3170 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3171 }
3172 assert((flags & 0xFF000000) == 0, "unexpected flags");
3173 return flags;
3174 }
3175
3176 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3177 return obj->obj_field(_classOrMemberName_offset);
3178 }
3179
3180 int java_lang_ClassFrameInfo::flags(oop obj) {
3181 return obj->int_field(_flags_offset);
3182 }
3183
3184 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3185 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3186 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3187 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3188 stackFrame->int_field_put(_flags_offset, flags);
3189 }
3190
3191 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3192 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3193 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3194 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3195 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3196 stackFrame->int_field_put(_flags_offset, flags);
3197 }
3198
3199
3200 // java_lang_StackFrameInfo
3201
3202 int java_lang_StackFrameInfo::_type_offset;
3203 int java_lang_StackFrameInfo::_name_offset;
3204 int java_lang_StackFrameInfo::_bci_offset;
3205 int java_lang_StackFrameInfo::_version_offset;
3206 int java_lang_StackFrameInfo::_contScope_offset;
3207
3208 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3209 macro(_type_offset, k, "type", object_signature, false); \
3210 macro(_name_offset, k, "name", string_signature, false); \
3211 macro(_bci_offset, k, "bci", int_signature, false); \
3212 macro(_contScope_offset, k, "contScope", continuationscope_signature, false)
3213
3214 void java_lang_StackFrameInfo::compute_offsets() {
3215 InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3216 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3217 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3218 }
3219
3220 #if INCLUDE_CDS
3221 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3222 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3223 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3224 }
3225 #endif
3226
3227 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3228 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3229 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3230 return method;
3231 }
3232
3233 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3234 // set Method* or mid/cpref
3235 HandleMark hm(THREAD);
3236 Handle cont_h(THREAD, cont);
3237 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3238
3239 // set bci
3240 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3241 // method may be redefined; store the version
3242 int version = method->constants()->version();
3243 assert((jushort)version == version, "version should be short");
3244 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3245
3246 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3247 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3248 }
3249
3250 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3251 ResourceMark rm(THREAD);
3252 HandleMark hm(THREAD);
3253
3254 Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3255 InstanceKlass* holder = method->method_holder();
3256 short version = stackFrame->short_field(_version_offset);
3257 int bci = stackFrame->int_field(_bci_offset);
3258 Symbol* name = method->name();
3259 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3260 }
3261
3262 oop java_lang_StackFrameInfo::type(oop obj) {
3263 return obj->obj_field(_type_offset);
3264 }
3265
3266 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3267 obj->obj_field_put(_type_offset, value);
3268 }
3269
3270 oop java_lang_StackFrameInfo::name(oop obj) {
3271 return obj->obj_field(_name_offset);
3272 }
3273
3274 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3275 obj->obj_field_put(_name_offset, value);
3276 }
3277
3278 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3279 obj->short_field_put(_version_offset, value);
3280 }
3281
3282 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3283 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3284 obj->int_field_put(_bci_offset, value);
3285 }
3286
3287 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3288 obj->obj_field_put(_contScope_offset, value);
3289 }
3290
3291 int java_lang_LiveStackFrameInfo::_monitors_offset;
3292 int java_lang_LiveStackFrameInfo::_locals_offset;
3293 int java_lang_LiveStackFrameInfo::_operands_offset;
3294 int java_lang_LiveStackFrameInfo::_mode_offset;
3295
3296 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3297 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
3298 macro(_locals_offset, k, "locals", object_array_signature, false); \
3299 macro(_operands_offset, k, "operands", object_array_signature, false); \
3300 macro(_mode_offset, k, "mode", int_signature, false)
3301
3302 void java_lang_LiveStackFrameInfo::compute_offsets() {
3303 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3304 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3305 }
3306
3307 #if INCLUDE_CDS
3308 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3309 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3310 }
3311 #endif
3312
3313 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3314 obj->obj_field_put(_monitors_offset, value);
3315 }
3316
3317 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3318 obj->obj_field_put(_locals_offset, value);
3319 }
3320
3321 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3322 obj->obj_field_put(_operands_offset, value);
3323 }
3324
3325 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3326 obj->int_field_put(_mode_offset, value);
3327 }
3328
3329
3330 // java_lang_AccessibleObject
3331
3332 int java_lang_reflect_AccessibleObject::_override_offset;
3333
3334 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3335 macro(_override_offset, k, "override", bool_signature, false)
3336
3337 void java_lang_reflect_AccessibleObject::compute_offsets() {
3338 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3339 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3340 }
3341
3342 #if INCLUDE_CDS
3343 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3344 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3345 }
3346 #endif
3347
3348 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3349 return (jboolean) reflect->bool_field(_override_offset);
3350 }
3351
3352 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3353 reflect->bool_field_put(_override_offset, (int) value);
3354 }
3355
3356 // java_lang_reflect_Method
3357
3358 int java_lang_reflect_Method::_clazz_offset;
3359 int java_lang_reflect_Method::_name_offset;
3360 int java_lang_reflect_Method::_returnType_offset;
3361 int java_lang_reflect_Method::_parameterTypes_offset;
3362 int java_lang_reflect_Method::_exceptionTypes_offset;
3363 int java_lang_reflect_Method::_slot_offset;
3364 int java_lang_reflect_Method::_modifiers_offset;
3365 int java_lang_reflect_Method::_signature_offset;
3366 int java_lang_reflect_Method::_annotations_offset;
3367 int java_lang_reflect_Method::_parameter_annotations_offset;
3368 int java_lang_reflect_Method::_annotation_default_offset;
3369
3370 #define METHOD_FIELDS_DO(macro) \
3371 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3372 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3373 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
3374 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3375 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3376 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3377 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3378 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3379 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3380 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3381 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
3382
3383 void java_lang_reflect_Method::compute_offsets() {
3384 InstanceKlass* k = vmClasses::reflect_Method_klass();
3385 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3386 }
3387
3388 #if INCLUDE_CDS
3389 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3390 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3391 }
3392 #endif
3393
3394 Handle java_lang_reflect_Method::create(TRAPS) {
3395 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3396 Klass* klass = vmClasses::reflect_Method_klass();
3397 // This class is eagerly initialized during VM initialization, since we keep a reference
3398 // to one of the methods
3399 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
3400 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
3401 }
3402
3403 oop java_lang_reflect_Method::clazz(oop reflect) {
3404 return reflect->obj_field(_clazz_offset);
3405 }
3406
3407 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3408 reflect->obj_field_put(_clazz_offset, value);
3409 }
3410
3411 int java_lang_reflect_Method::slot(oop reflect) {
3412 return reflect->int_field(_slot_offset);
3413 }
3414
3415 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3416 reflect->int_field_put(_slot_offset, value);
3417 }
3418
3419 void java_lang_reflect_Method::set_name(oop method, oop value) {
3420 method->obj_field_put(_name_offset, value);
3421 }
3422
3423 oop java_lang_reflect_Method::return_type(oop method) {
3424 return method->obj_field(_returnType_offset);
3425 }
3426
3427 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3428 method->obj_field_put(_returnType_offset, value);
3429 }
3430
3431 oop java_lang_reflect_Method::parameter_types(oop method) {
3432 return method->obj_field(_parameterTypes_offset);
3433 }
3434
3435 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3436 method->obj_field_put(_parameterTypes_offset, value);
3437 }
3438
3439 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3440 method->obj_field_put(_exceptionTypes_offset, value);
3441 }
3442
3443 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3444 method->int_field_put(_modifiers_offset, value);
3445 }
3446
3447 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3448 method->obj_field_put(_signature_offset, value);
3449 }
3450
3451 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3452 method->obj_field_put(_annotations_offset, value);
3453 }
3454
3455 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3456 method->obj_field_put(_parameter_annotations_offset, value);
3457 }
3458
3459 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3460 method->obj_field_put(_annotation_default_offset, value);
3461 }
3462
3463 int java_lang_reflect_Constructor::_clazz_offset;
3464 int java_lang_reflect_Constructor::_parameterTypes_offset;
3465 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3466 int java_lang_reflect_Constructor::_slot_offset;
3467 int java_lang_reflect_Constructor::_modifiers_offset;
3468 int java_lang_reflect_Constructor::_signature_offset;
3469 int java_lang_reflect_Constructor::_annotations_offset;
3470 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3471
3472 #define CONSTRUCTOR_FIELDS_DO(macro) \
3473 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3474 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3475 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3476 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3477 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3478 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3479 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3480 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3481
3482 void java_lang_reflect_Constructor::compute_offsets() {
3483 InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3484 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3485 }
3486
3487 #if INCLUDE_CDS
3488 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3489 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3490 }
3491 #endif
3492
3493 Handle java_lang_reflect_Constructor::create(TRAPS) {
3494 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3495 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3496 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3497 InstanceKlass* ik = InstanceKlass::cast(k);
3498 // Ensure it is initialized
3499 ik->initialize(CHECK_NH);
3500 return ik->allocate_instance_handle(THREAD);
3501 }
3502
3503 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3504 return reflect->obj_field(_clazz_offset);
3505 }
3506
3507 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3508 reflect->obj_field_put(_clazz_offset, value);
3509 }
3510
3511 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3512 return constructor->obj_field(_parameterTypes_offset);
3513 }
3514
3515 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3516 constructor->obj_field_put(_parameterTypes_offset, value);
3517 }
3518
3519 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3520 constructor->obj_field_put(_exceptionTypes_offset, value);
3521 }
3522
3523 int java_lang_reflect_Constructor::slot(oop reflect) {
3524 return reflect->int_field(_slot_offset);
3525 }
3526
3527 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3528 reflect->int_field_put(_slot_offset, value);
3529 }
3530
3531 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3532 constructor->int_field_put(_modifiers_offset, value);
3533 }
3534
3535 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3536 constructor->obj_field_put(_signature_offset, value);
3537 }
3538
3539 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3540 constructor->obj_field_put(_annotations_offset, value);
3541 }
3542
3543 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3544 method->obj_field_put(_parameter_annotations_offset, value);
3545 }
3546
3547 int java_lang_reflect_Field::_clazz_offset;
3548 int java_lang_reflect_Field::_name_offset;
3549 int java_lang_reflect_Field::_type_offset;
3550 int java_lang_reflect_Field::_slot_offset;
3551 int java_lang_reflect_Field::_modifiers_offset;
3552 int java_lang_reflect_Field::_trusted_final_offset;
3553 int java_lang_reflect_Field::_signature_offset;
3554 int java_lang_reflect_Field::_annotations_offset;
3555
3556 #define FIELD_FIELDS_DO(macro) \
3557 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3558 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3559 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \
3560 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3561 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3562 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \
3563 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3564 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3565
3566 void java_lang_reflect_Field::compute_offsets() {
3567 InstanceKlass* k = vmClasses::reflect_Field_klass();
3568 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3569 }
3570
3571 #if INCLUDE_CDS
3572 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3573 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3574 }
3575 #endif
3576
3577 Handle java_lang_reflect_Field::create(TRAPS) {
3578 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3579 Symbol* name = vmSymbols::java_lang_reflect_Field();
3580 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3581 InstanceKlass* ik = InstanceKlass::cast(k);
3582 // Ensure it is initialized
3583 ik->initialize(CHECK_NH);
3584 return ik->allocate_instance_handle(THREAD);
3585 }
3586
3587 oop java_lang_reflect_Field::clazz(oop reflect) {
3588 return reflect->obj_field(_clazz_offset);
3589 }
3590
3591 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3592 reflect->obj_field_put(_clazz_offset, value);
3593 }
3594
3595 oop java_lang_reflect_Field::name(oop field) {
3596 return field->obj_field(_name_offset);
3597 }
3598
3599 void java_lang_reflect_Field::set_name(oop field, oop value) {
3600 field->obj_field_put(_name_offset, value);
3601 }
3602
3603 oop java_lang_reflect_Field::type(oop field) {
3604 return field->obj_field(_type_offset);
3605 }
3606
3607 void java_lang_reflect_Field::set_type(oop field, oop value) {
3608 field->obj_field_put(_type_offset, value);
3609 }
3610
3611 int java_lang_reflect_Field::slot(oop reflect) {
3612 return reflect->int_field(_slot_offset);
3613 }
3614
3615 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3616 reflect->int_field_put(_slot_offset, value);
3617 }
3618
3619 int java_lang_reflect_Field::modifiers(oop field) {
3620 return field->int_field(_modifiers_offset);
3621 }
3622
3623 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3624 field->int_field_put(_modifiers_offset, value);
3625 }
3626
3627 void java_lang_reflect_Field::set_trusted_final(oop field) {
3628 field->bool_field_put(_trusted_final_offset, true);
3629 }
3630
3631 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3632 field->obj_field_put(_signature_offset, value);
3633 }
3634
3635 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3636 field->obj_field_put(_annotations_offset, value);
3637 }
3638
3639 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3640 // Allocate java.lang.reflect.RecordComponent instance
3641 HandleMark hm(THREAD);
3642 InstanceKlass* ik = vmClasses::RecordComponent_klass();
3643 assert(ik != nullptr, "must be loaded");
3644 ik->initialize(CHECK_NULL);
3645
3646 Handle element = ik->allocate_instance_handle(CHECK_NULL);
3647
3648 Handle decl_class(THREAD, holder->java_mirror());
3649 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3650
3651 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3652 oop component_name = StringTable::intern(name, CHECK_NULL);
3653 java_lang_reflect_RecordComponent::set_name(element(), component_name);
3654
3655 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3656 Handle component_type_h =
3657 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3658 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3659
3660 Method* accessor_method = nullptr;
3661 {
3662 // Prepend "()" to type to create the full method signature.
3663 ResourceMark rm(THREAD);
3664 int sig_len = type->utf8_length() + 3; // "()" and null char
3665 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3666 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3667 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3668 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3669 }
3670
3671 if (accessor_method != nullptr) {
3672 methodHandle method(THREAD, accessor_method);
3673 oop m = Reflection::new_method(method, false, CHECK_NULL);
3674 java_lang_reflect_RecordComponent::set_accessor(element(), m);
3675 } else {
3676 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3677 }
3678
3679 int sig_index = component->generic_signature_index();
3680 if (sig_index > 0) {
3681 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3682 oop component_sig = StringTable::intern(sig, CHECK_NULL);
3683 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3684 } else {
3685 java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3686 }
3687
3688 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3689 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3690
3691 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3692 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3693
3694 return element();
3695 }
3696
3697 int reflect_ConstantPool::_oop_offset;
3698
3699 #define CONSTANTPOOL_FIELDS_DO(macro) \
3700 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3701
3702 void reflect_ConstantPool::compute_offsets() {
3703 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3704 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3705 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3706 }
3707
3708 #if INCLUDE_CDS
3709 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3710 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3711 }
3712 #endif
3713
3714 int java_lang_reflect_Parameter::_name_offset;
3715 int java_lang_reflect_Parameter::_modifiers_offset;
3716 int java_lang_reflect_Parameter::_index_offset;
3717 int java_lang_reflect_Parameter::_executable_offset;
3718
3719 #define PARAMETER_FIELDS_DO(macro) \
3720 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3721 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3722 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \
3723 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3724
3725 void java_lang_reflect_Parameter::compute_offsets() {
3726 InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3727 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3728 }
3729
3730 #if INCLUDE_CDS
3731 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3732 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3733 }
3734 #endif
3735
3736 Handle java_lang_reflect_Parameter::create(TRAPS) {
3737 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3738 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3739 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3740 InstanceKlass* ik = InstanceKlass::cast(k);
3741 // Ensure it is initialized
3742 ik->initialize(CHECK_NH);
3743 return ik->allocate_instance_handle(THREAD);
3744 }
3745
3746 oop java_lang_reflect_Parameter::name(oop param) {
3747 return param->obj_field(_name_offset);
3748 }
3749
3750 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3751 param->obj_field_put(_name_offset, value);
3752 }
3753
3754 int java_lang_reflect_Parameter::modifiers(oop param) {
3755 return param->int_field(_modifiers_offset);
3756 }
3757
3758 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3759 param->int_field_put(_modifiers_offset, value);
3760 }
3761
3762 int java_lang_reflect_Parameter::index(oop param) {
3763 return param->int_field(_index_offset);
3764 }
3765
3766 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3767 param->int_field_put(_index_offset, value);
3768 }
3769
3770 oop java_lang_reflect_Parameter::executable(oop param) {
3771 return param->obj_field(_executable_offset);
3772 }
3773
3774 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3775 param->obj_field_put(_executable_offset, value);
3776 }
3777
3778 // java_lang_Module
3779
3780 int java_lang_Module::_loader_offset;
3781 int java_lang_Module::_name_offset;
3782 int java_lang_Module::_module_entry_offset;
3783
3784 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3785 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3786 return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3787 vmSymbols::java_lang_module_init_signature(),
3788 loader, module_name, CHECK_NH);
3789 }
3790
3791 #define MODULE_FIELDS_DO(macro) \
3792 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3793 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false)
3794
3795 void java_lang_Module::compute_offsets() {
3796 InstanceKlass* k = vmClasses::Module_klass();
3797 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3798 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3799 }
3800
3801 #if INCLUDE_CDS
3802 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3803 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3804 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3805 }
3806 #endif
3807
3808 oop java_lang_Module::loader(oop module) {
3809 return module->obj_field(_loader_offset);
3810 }
3811
3812 void java_lang_Module::set_loader(oop module, oop value) {
3813 module->obj_field_put(_loader_offset, value);
3814 }
3815
3816 oop java_lang_Module::name(oop module) {
3817 return module->obj_field(_name_offset);
3818 }
3819
3820 void java_lang_Module::set_name(oop module, oop value) {
3821 module->obj_field_put(_name_offset, value);
3822 }
3823
3824 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3825 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3826 assert(module != nullptr, "module can't be null");
3827 assert(oopDesc::is_oop(module), "module must be oop");
3828
3829 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3830 return module_entry;
3831 }
3832
3833 ModuleEntry* java_lang_Module::module_entry(oop module) {
3834 ModuleEntry* module_entry = module_entry_raw(module);
3835 if (module_entry == nullptr) {
3836 // If the inject field containing the ModuleEntry* is null then return the
3837 // class loader's unnamed module.
3838 oop loader = java_lang_Module::loader(module);
3839 Handle h_loader = Handle(Thread::current(), loader);
3840 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3841 return loader_cld->unnamed_module();
3842 }
3843 return module_entry;
3844 }
3845
3846 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3847 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3848 assert(module != nullptr, "module can't be null");
3849 assert(oopDesc::is_oop(module), "module must be oop");
3850 module->address_field_put(_module_entry_offset, (address)module_entry);
3851 }
3852
3853 Handle reflect_ConstantPool::create(TRAPS) {
3854 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3855 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3856 // Ensure it is initialized
3857 k->initialize(CHECK_NH);
3858 return k->allocate_instance_handle(THREAD);
3859 }
3860
3861
3862 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3863 oop mirror = value->pool_holder()->java_mirror();
3864 // Save the mirror to get back the constant pool.
3865 reflect->obj_field_put(_oop_offset, mirror);
3866 }
3867
3868 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3869
3870 oop mirror = reflect->obj_field(_oop_offset);
3871 Klass* k = java_lang_Class::as_Klass(mirror);
3872 assert(k->is_instance_klass(), "Must be");
3873
3874 // Get the constant pool back from the klass. Since class redefinition
3875 // merges the new constant pool into the old, this is essentially the
3876 // same constant pool as the original. If constant pool merging is
3877 // no longer done in the future, this will have to change to save
3878 // the original.
3879 return InstanceKlass::cast(k)->constants();
3880 }
3881
3882
3883 // Support for java_lang_ref_Reference
3884
3885 bool java_lang_ref_Reference::_offsets_initialized;
3886
3887 int java_lang_ref_Reference::_referent_offset;
3888 int java_lang_ref_Reference::_queue_offset;
3889 int java_lang_ref_Reference::_next_offset;
3890 int java_lang_ref_Reference::_discovered_offset;
3891
3892 #define REFERENCE_FIELDS_DO(macro) \
3893 macro(_referent_offset, k, "referent", object_signature, false); \
3894 macro(_queue_offset, k, "queue", referencequeue_signature, false); \
3895 macro(_next_offset, k, "next", reference_signature, false); \
3896 macro(_discovered_offset, k, "discovered", reference_signature, false);
3897
3898 void java_lang_ref_Reference::compute_offsets() {
3899 if (_offsets_initialized) {
3900 return;
3901 }
3902 _offsets_initialized = true;
3903 InstanceKlass* k = vmClasses::Reference_klass();
3904 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3905 }
3906
3907 #if INCLUDE_CDS
3908 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3909 f->do_bool(&_offsets_initialized);
3910 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3911 }
3912 #endif
3913
3914 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3915 assert(obj != nullptr, "sanity");
3916 if (offset != _referent_offset) {
3917 return false;
3918 }
3919
3920 Klass* k = obj->klass();
3921 if (!k->is_instance_klass()) {
3922 return false;
3923 }
3924
3925 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3926 bool is_reference = ik->reference_type() != REF_NONE;
3927 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
3928 return is_reference;
3929 }
3930
3931 int java_lang_boxing_object::_value_offset;
3932 int java_lang_boxing_object::_long_value_offset;
3933
3934 #define BOXING_FIELDS_DO(macro) \
3935 macro(_value_offset, integerKlass, "value", int_signature, false); \
3936 macro(_long_value_offset, longKlass, "value", long_signature, false);
3937
3938 void java_lang_boxing_object::compute_offsets() {
3939 InstanceKlass* integerKlass = vmClasses::Integer_klass();
3940 InstanceKlass* longKlass = vmClasses::Long_klass();
3941 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3942 }
3943
3944 #if INCLUDE_CDS
3945 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
3946 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3947 }
3948 #endif
3949
3950 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3951 Klass* k = vmClasses::box_klass(type);
3952 if (k == nullptr) return nullptr;
3953 InstanceKlass* ik = InstanceKlass::cast(k);
3954 if (!ik->is_initialized()) {
3955 ik->initialize(CHECK_NULL);
3956 }
3957 return ik->allocate_instance(THREAD);
3958 }
3959
3960
3961 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3962 oop box = initialize_and_allocate(type, CHECK_NULL);
3963 if (box == nullptr) return nullptr;
3964 switch (type) {
3965 case T_BOOLEAN:
3966 box->bool_field_put(_value_offset, value->z);
3967 break;
3968 case T_CHAR:
3969 box->char_field_put(_value_offset, value->c);
3970 break;
3971 case T_FLOAT:
3972 box->float_field_put(_value_offset, value->f);
3973 break;
3974 case T_DOUBLE:
3975 box->double_field_put(_long_value_offset, value->d);
3976 break;
3977 case T_BYTE:
3978 box->byte_field_put(_value_offset, value->b);
3979 break;
3980 case T_SHORT:
3981 box->short_field_put(_value_offset, value->s);
3982 break;
3983 case T_INT:
3984 box->int_field_put(_value_offset, value->i);
3985 break;
3986 case T_LONG:
3987 box->long_field_put(_long_value_offset, value->j);
3988 break;
3989 default:
3990 return nullptr;
3991 }
3992 return box;
3993 }
3994
3995
3996 BasicType java_lang_boxing_object::basic_type(oop box) {
3997 if (box == nullptr) return T_ILLEGAL;
3998 BasicType type = vmClasses::box_klass_type(box->klass());
3999 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
4000 return T_ILLEGAL;
4001 return type;
4002 }
4003
4004
4005 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
4006 BasicType type = vmClasses::box_klass_type(box->klass());
4007 switch (type) {
4008 case T_BOOLEAN:
4009 value->z = box->bool_field(_value_offset);
4010 break;
4011 case T_CHAR:
4012 value->c = box->char_field(_value_offset);
4013 break;
4014 case T_FLOAT:
4015 value->f = box->float_field(_value_offset);
4016 break;
4017 case T_DOUBLE:
4018 value->d = box->double_field(_long_value_offset);
4019 break;
4020 case T_BYTE:
4021 value->b = box->byte_field(_value_offset);
4022 break;
4023 case T_SHORT:
4024 value->s = box->short_field(_value_offset);
4025 break;
4026 case T_INT:
4027 value->i = box->int_field(_value_offset);
4028 break;
4029 case T_LONG:
4030 value->j = box->long_field(_long_value_offset);
4031 break;
4032 default:
4033 return T_ILLEGAL;
4034 } // end switch
4035 return type;
4036 }
4037
4038
4039 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
4040 BasicType type = vmClasses::box_klass_type(box->klass());
4041 switch (type) {
4042 case T_BOOLEAN:
4043 box->bool_field_put(_value_offset, value->z);
4044 break;
4045 case T_CHAR:
4046 box->char_field_put(_value_offset, value->c);
4047 break;
4048 case T_FLOAT:
4049 box->float_field_put(_value_offset, value->f);
4050 break;
4051 case T_DOUBLE:
4052 box->double_field_put(_long_value_offset, value->d);
4053 break;
4054 case T_BYTE:
4055 box->byte_field_put(_value_offset, value->b);
4056 break;
4057 case T_SHORT:
4058 box->short_field_put(_value_offset, value->s);
4059 break;
4060 case T_INT:
4061 box->int_field_put(_value_offset, value->i);
4062 break;
4063 case T_LONG:
4064 box->long_field_put(_long_value_offset, value->j);
4065 break;
4066 default:
4067 return T_ILLEGAL;
4068 } // end switch
4069 return type;
4070 }
4071
4072
4073 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
4074 switch (type) {
4075 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
4076 case T_CHAR: st->print("%d", value->c); break;
4077 case T_BYTE: st->print("%d", value->b); break;
4078 case T_SHORT: st->print("%d", value->s); break;
4079 case T_INT: st->print("%d", value->i); break;
4080 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
4081 case T_FLOAT: st->print("%f", value->f); break;
4082 case T_DOUBLE: st->print("%lf", value->d); break;
4083 default: st->print("type %d?", type); break;
4084 }
4085 }
4086
4087
4088 // Support for java_lang_ref_SoftReference
4089 //
4090
4091 int java_lang_ref_SoftReference::_timestamp_offset;
4092 int java_lang_ref_SoftReference::_static_clock_offset;
4093
4094 #define SOFTREFERENCE_FIELDS_DO(macro) \
4095 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
4096 macro(_static_clock_offset, k, "clock", long_signature, true)
4097
4098 void java_lang_ref_SoftReference::compute_offsets() {
4099 InstanceKlass* k = vmClasses::SoftReference_klass();
4100 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4101 }
4102
4103 #if INCLUDE_CDS
4104 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
4105 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4106 }
4107 #endif
4108
4109 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
4110 return ref->long_field(_timestamp_offset);
4111 }
4112
4113 jlong java_lang_ref_SoftReference::clock() {
4114 InstanceKlass* ik = vmClasses::SoftReference_klass();
4115 oop base = ik->static_field_base_raw();
4116 return base->long_field(_static_clock_offset);
4117 }
4118
4119 void java_lang_ref_SoftReference::set_clock(jlong value) {
4120 InstanceKlass* ik = vmClasses::SoftReference_klass();
4121 oop base = ik->static_field_base_raw();
4122 base->long_field_put(_static_clock_offset, value);
4123 }
4124
4125 // Support for java_lang_invoke_DirectMethodHandle
4126
4127 int java_lang_invoke_DirectMethodHandle::_member_offset;
4128
4129 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
4130 oop member_name = nullptr;
4131 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
4132 "a DirectMethodHandle oop is expected");
4133 return dmh->obj_field(_member_offset);
4134 }
4135
4136 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
4137 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
4138
4139 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
4140 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
4141 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4142 }
4143
4144 #if INCLUDE_CDS
4145 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
4146 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4147 }
4148 #endif
4149
4150 // Support for java_lang_invoke_MethodHandle
4151
4152 int java_lang_invoke_MethodHandle::_type_offset;
4153 int java_lang_invoke_MethodHandle::_form_offset;
4154
4155 int java_lang_invoke_MemberName::_clazz_offset;
4156 int java_lang_invoke_MemberName::_name_offset;
4157 int java_lang_invoke_MemberName::_type_offset;
4158 int java_lang_invoke_MemberName::_flags_offset;
4159 int java_lang_invoke_MemberName::_method_offset;
4160 int java_lang_invoke_MemberName::_vmindex_offset;
4161
4162 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
4163 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
4164
4165 int java_lang_invoke_LambdaForm::_vmentry_offset;
4166
4167 #define METHODHANDLE_FIELDS_DO(macro) \
4168 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4169 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
4170
4171 void java_lang_invoke_MethodHandle::compute_offsets() {
4172 InstanceKlass* k = vmClasses::MethodHandle_klass();
4173 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4174 }
4175
4176 #if INCLUDE_CDS
4177 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4178 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4179 }
4180 #endif
4181
4182 #define MEMBERNAME_FIELDS_DO(macro) \
4183 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4184 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4185 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
4186 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
4187 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
4188
4189 void java_lang_invoke_MemberName::compute_offsets() {
4190 InstanceKlass* k = vmClasses::MemberName_klass();
4191 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4192 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4193 }
4194
4195 #if INCLUDE_CDS
4196 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4197 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4198 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4199 }
4200 #endif
4201
4202 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4203 macro(_vmholder_offset, k, "vmholder", class_signature, false)
4204
4205 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4206 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4207 assert(k != nullptr, "jdk mismatch");
4208 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4209 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4210 }
4211
4212 #if INCLUDE_CDS
4213 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4214 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4215 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4216 }
4217 #endif
4218
4219 #define LAMBDAFORM_FIELDS_DO(macro) \
4220 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4221
4222 void java_lang_invoke_LambdaForm::compute_offsets() {
4223 InstanceKlass* k = vmClasses::LambdaForm_klass();
4224 assert (k != nullptr, "jdk mismatch");
4225 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4226 }
4227
4228 #if INCLUDE_CDS
4229 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4230 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4231 }
4232 #endif
4233
4234 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4235 return obj != nullptr && is_subclass(obj->klass());
4236 }
4237
4238 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4239 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4240
4241 #define NEP_FIELDS_DO(macro) \
4242 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
4243 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4244
4245 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4246 return obj != nullptr && is_subclass(obj->klass());
4247 }
4248
4249 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4250 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4251 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4252 }
4253
4254 #if INCLUDE_CDS
4255 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4256 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4257 }
4258 #endif
4259
4260 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4261 return entry->obj_field(_method_type_offset);
4262 }
4263
4264 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4265 return entry->long_field(_downcall_stub_address_offset);
4266 }
4267
4268 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4269 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4270 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4271 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4272 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4273 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4274 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4275
4276 #define ABIDescriptor_FIELDS_DO(macro) \
4277 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4278 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4279 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4280 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4281 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4282 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4283 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4284
4285 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4286 return obj != nullptr && is_subclass(obj->klass());
4287 }
4288
4289 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4290 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4291 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4292 }
4293
4294 #if INCLUDE_CDS
4295 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4296 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4297 }
4298 #endif
4299
4300 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4301 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4302 }
4303
4304 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4305 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4306 }
4307
4308 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4309 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4310 }
4311
4312 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4313 return entry->int_field(_stackAlignment_offset);
4314 }
4315
4316 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4317 return entry->int_field(_shadowSpace_offset);
4318 }
4319
4320 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4321 return entry->obj_field(_scratch1_offset);
4322 }
4323
4324 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4325 return entry->obj_field(_scratch2_offset);
4326 }
4327
4328 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4329 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4330 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4331 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4332
4333 #define VMStorage_FIELDS_DO(macro) \
4334 macro(_type_offset, k, "type", byte_signature, false); \
4335 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4336 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4337 macro(_debugName_offset, k, "debugName", string_signature, false); \
4338
4339 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4340 return obj != nullptr && is_subclass(obj->klass());
4341 }
4342
4343 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4344 InstanceKlass* k = vmClasses::VMStorage_klass();
4345 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4346 }
4347
4348 #if INCLUDE_CDS
4349 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4350 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4351 }
4352 #endif
4353
4354 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4355 return entry->byte_field(_type_offset);
4356 }
4357
4358 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4359 return entry->int_field(_indexOrOffset_offset);
4360 }
4361
4362 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4363 return entry->short_field(_segmentMaskOrSize_offset);
4364 }
4365
4366 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4367 return entry->obj_field(_debugName_offset);
4368 }
4369
4370 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4371 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4372
4373 #define CallConv_FIELDS_DO(macro) \
4374 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4375 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4376
4377 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4378 return obj != nullptr && is_subclass(obj->klass());
4379 }
4380
4381 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4382 InstanceKlass* k = vmClasses::CallConv_klass();
4383 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4384 }
4385
4386 #if INCLUDE_CDS
4387 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4388 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4389 }
4390 #endif
4391
4392 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4393 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4394 }
4395
4396 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4397 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4398 }
4399
4400 oop java_lang_invoke_MethodHandle::type(oop mh) {
4401 return mh->obj_field(_type_offset);
4402 }
4403
4404 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4405 mh->obj_field_put(_type_offset, mtype);
4406 }
4407
4408 oop java_lang_invoke_MethodHandle::form(oop mh) {
4409 assert(_form_offset != 0, "");
4410 return mh->obj_field(_form_offset);
4411 }
4412
4413 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4414 assert(_form_offset != 0, "");
4415 mh->obj_field_put(_form_offset, lform);
4416 }
4417
4418 /// MemberName accessors
4419
4420 oop java_lang_invoke_MemberName::clazz(oop mname) {
4421 assert(is_instance(mname), "wrong type");
4422 return mname->obj_field(_clazz_offset);
4423 }
4424
4425 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4426 assert(is_instance(mname), "wrong type");
4427 mname->obj_field_put(_clazz_offset, clazz);
4428 }
4429
4430 oop java_lang_invoke_MemberName::name(oop mname) {
4431 assert(is_instance(mname), "wrong type");
4432 return mname->obj_field(_name_offset);
4433 }
4434
4435 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4436 assert(is_instance(mname), "wrong type");
4437 mname->obj_field_put(_name_offset, name);
4438 }
4439
4440 oop java_lang_invoke_MemberName::type(oop mname) {
4441 assert(is_instance(mname), "wrong type");
4442 return mname->obj_field(_type_offset);
4443 }
4444
4445 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4446 assert(is_instance(mname), "wrong type");
4447 mname->obj_field_put(_type_offset, type);
4448 }
4449
4450 int java_lang_invoke_MemberName::flags(oop mname) {
4451 assert(is_instance(mname), "wrong type");
4452 return mname->int_field(_flags_offset);
4453 }
4454
4455 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4456 assert(is_instance(mname), "wrong type");
4457 mname->int_field_put(_flags_offset, flags);
4458 }
4459
4460
4461 // Return vmtarget from ResolvedMethodName method field through indirection
4462 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4463 assert(is_instance(mname), "wrong type");
4464 oop method = mname->obj_field(_method_offset);
4465 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4466 }
4467
4468 bool java_lang_invoke_MemberName::is_method(oop mname) {
4469 assert(is_instance(mname), "must be MemberName");
4470 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
4471 }
4472
4473 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4474 assert(is_instance(mname), "wrong type");
4475 mname->obj_field_put(_method_offset, resolved_method);
4476 }
4477
4478 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4479 assert(is_instance(mname), "wrong type");
4480 return (intptr_t) mname->address_field(_vmindex_offset);
4481 }
4482
4483 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4484 assert(is_instance(mname), "wrong type");
4485 mname->address_field_put(_vmindex_offset, (address) index);
4486 }
4487
4488
4489 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4490 assert(is_instance(resolved_method), "wrong type");
4491 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4492 assert(m->is_method(), "must be");
4493 return m;
4494 }
4495
4496 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4497 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4498 assert(is_instance(resolved_method), "wrong type");
4499 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4500 }
4501
4502 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4503 assert(is_instance(resolved_method), "wrong type");
4504 resolved_method->obj_field_put(_vmholder_offset, holder);
4505 }
4506
4507 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4508 const Method* method = m();
4509
4510 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4511 oop resolved_method = ResolvedMethodTable::find_method(method);
4512 if (resolved_method != nullptr) {
4513 return resolved_method;
4514 }
4515
4516 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4517 if (!k->is_initialized()) {
4518 k->initialize(CHECK_NULL);
4519 }
4520
4521 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4522
4523 NoSafepointVerifier nsv;
4524
4525 if (method->is_old()) {
4526 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4527 method->get_new_method();
4528 }
4529
4530 InstanceKlass* holder = method->method_holder();
4531
4532 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4533 // Add a reference to the loader (actually mirror because hidden classes may not have
4534 // distinct loaders) to ensure the metadata is kept alive.
4535 // This mirror may be different than the one in clazz field.
4536 set_vmholder(new_resolved_method, holder->java_mirror());
4537
4538 // Set flag in class to indicate this InstanceKlass has entries in the table
4539 // to avoid walking table during redefinition if none of the redefined classes
4540 // have any membernames in the table.
4541 holder->set_has_resolved_methods();
4542
4543 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4544 }
4545
4546 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4547 assert(is_instance(lform), "wrong type");
4548 return lform->obj_field(_vmentry_offset);
4549 }
4550
4551
4552 // Support for java_lang_invoke_MethodType
4553
4554 int java_lang_invoke_MethodType::_rtype_offset;
4555 int java_lang_invoke_MethodType::_ptypes_offset;
4556
4557 #define METHODTYPE_FIELDS_DO(macro) \
4558 macro(_rtype_offset, k, "rtype", class_signature, false); \
4559 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4560
4561 void java_lang_invoke_MethodType::compute_offsets() {
4562 InstanceKlass* k = vmClasses::MethodType_klass();
4563 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4564 }
4565
4566 #if INCLUDE_CDS
4567 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4568 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4569 }
4570 #endif
4571
4572 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4573 st->print("(");
4574 objArrayOop pts = ptypes(mt);
4575 if (pts != nullptr) {
4576 for (int i = 0, limit = pts->length(); i < limit; i++) {
4577 java_lang_Class::print_signature(pts->obj_at(i), st);
4578 }
4579 } else {
4580 st->print("null");
4581 }
4582 st->print(")");
4583 oop rt = rtype(mt);
4584 if (rt != nullptr) {
4585 java_lang_Class::print_signature(rt, st);
4586 } else {
4587 st->print("null");
4588 }
4589 }
4590
4591 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4592 ResourceMark rm;
4593 stringStream buffer(128);
4594 print_signature(mt, &buffer);
4595 const char* sigstr = buffer.base();
4596 int siglen = (int) buffer.size();
4597 Symbol *name;
4598 if (!intern_if_not_found) {
4599 name = SymbolTable::probe(sigstr, siglen);
4600 } else {
4601 name = SymbolTable::new_symbol(sigstr, siglen);
4602 }
4603 return name;
4604 }
4605
4606 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4607 if (mt1 == mt2)
4608 return true;
4609 if (rtype(mt1) != rtype(mt2))
4610 return false;
4611 if (ptype_count(mt1) != ptype_count(mt2))
4612 return false;
4613 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4614 if (ptype(mt1, i) != ptype(mt2, i))
4615 return false;
4616 }
4617 return true;
4618 }
4619
4620 oop java_lang_invoke_MethodType::rtype(oop mt) {
4621 assert(is_instance(mt), "must be a MethodType");
4622 return mt->obj_field(_rtype_offset);
4623 }
4624
4625 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4626 assert(is_instance(mt), "must be a MethodType");
4627 return (objArrayOop) mt->obj_field(_ptypes_offset);
4628 }
4629
4630 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4631 return ptypes(mt)->obj_at(idx);
4632 }
4633
4634 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4635 return ptypes(mt)->length();
4636 }
4637
4638 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4639 objArrayOop pts = ptypes(mt);
4640 int count = pts->length();
4641 int slots = 0;
4642 for (int i = 0; i < count; i++) {
4643 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4644 slots += type2size[bt];
4645 }
4646 return slots;
4647 }
4648
4649 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4650 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4651 return type2size[bt];
4652 }
4653
4654
4655 // Support for java_lang_invoke_CallSite
4656
4657 int java_lang_invoke_CallSite::_target_offset;
4658 int java_lang_invoke_CallSite::_context_offset;
4659
4660 #define CALLSITE_FIELDS_DO(macro) \
4661 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
4662 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
4663
4664 void java_lang_invoke_CallSite::compute_offsets() {
4665 InstanceKlass* k = vmClasses::CallSite_klass();
4666 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4667 }
4668
4669 #if INCLUDE_CDS
4670 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4671 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4672 }
4673 #endif
4674
4675 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
4676 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4677
4678 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
4679 return dep_oop;
4680 }
4681
4682 // Support for java_lang_invoke_ConstantCallSite
4683
4684 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4685
4686 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4687 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4688
4689 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4690 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4691 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4692 }
4693
4694 #if INCLUDE_CDS
4695 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4696 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4697 }
4698 #endif
4699
4700 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
4701
4702 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
4703 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
4704
4705 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
4706 InstanceKlass* k = vmClasses::Context_klass();
4707 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4708 }
4709
4710 #if INCLUDE_CDS
4711 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
4712 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4713 }
4714 #endif
4715
4716 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
4717 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
4718 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4719 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4720 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4721 return dep_ctx;
4722 }
4723
4724 // Support for java_security_AccessControlContext
4725
4726 int java_security_AccessControlContext::_context_offset;
4727 int java_security_AccessControlContext::_privilegedContext_offset;
4728 int java_security_AccessControlContext::_isPrivileged_offset;
4729 int java_security_AccessControlContext::_isAuthorized_offset;
4730
4731 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
4732 macro(_context_offset, k, "context", protectiondomain_signature, false); \
4733 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
4734 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
4735 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
4736
4737 void java_security_AccessControlContext::compute_offsets() {
4738 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
4739 InstanceKlass* k = vmClasses::AccessControlContext_klass();
4740 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4741 }
4742
4743 #if INCLUDE_CDS
4744 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
4745 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4746 }
4747 #endif
4748
4749 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
4750 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
4751 assert(_isAuthorized_offset != 0, "offsets should have been initialized");
4752 // Ensure klass is initialized
4753 vmClasses::AccessControlContext_klass()->initialize(CHECK_NULL);
4754 // Allocate result
4755 oop result = vmClasses::AccessControlContext_klass()->allocate_instance(CHECK_NULL);
4756 // Fill in values
4757 result->obj_field_put(_context_offset, context());
4758 result->obj_field_put(_privilegedContext_offset, privileged_context());
4759 result->bool_field_put(_isPrivileged_offset, isPrivileged);
4760 result->bool_field_put(_isAuthorized_offset, true);
4761 return result;
4762 }
4763
4764
4765 // Support for java_lang_ClassLoader
4766
4767 int java_lang_ClassLoader::_loader_data_offset;
4768 int java_lang_ClassLoader::_parallelCapable_offset;
4769 int java_lang_ClassLoader::_name_offset;
4770 int java_lang_ClassLoader::_nameAndId_offset;
4771 int java_lang_ClassLoader::_unnamedModule_offset;
4772 int java_lang_ClassLoader::_parent_offset;
4773
4774 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4775 assert(loader != nullptr, "loader must not be null");
4776 assert(oopDesc::is_oop(loader), "loader must be oop");
4777 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4778 }
4779
4780 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4781 assert(loader != nullptr, "loader must not be null");
4782 assert(oopDesc::is_oop(loader), "loader must be oop");
4783 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4784 }
4785
4786 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4787 assert(loader != nullptr, "loader must not be null");
4788 assert(oopDesc::is_oop(loader), "loader must be oop");
4789 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4790 }
4791
4792 #define CLASSLOADER_FIELDS_DO(macro) \
4793 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4794 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4795 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
4796 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4797 macro(_parent_offset, k1, "parent", classloader_signature, false)
4798
4799 void java_lang_ClassLoader::compute_offsets() {
4800 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4801 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4802
4803 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4804 }
4805
4806 #if INCLUDE_CDS
4807 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4808 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4809 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4810 }
4811 #endif
4812
4813 oop java_lang_ClassLoader::parent(oop loader) {
4814 assert(is_instance(loader), "loader must be oop");
4815 return loader->obj_field(_parent_offset);
4816 }
4817
4818 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4819 assert(is_instance(loader), "loader must be oop");
4820 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4821 }
4822
4823 // Returns the name field of this class loader. If the name field has not
4824 // been set, null will be returned.
4825 oop java_lang_ClassLoader::name(oop loader) {
4826 assert(is_instance(loader), "loader must be oop");
4827 return loader->obj_field(_name_offset);
4828 }
4829
4830 // Returns the nameAndId field of this class loader. The format is
4831 // as follows:
4832 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4833 // If the defining loader has no name then <qualified-class-name> @<id>
4834 // If built-in loader, then omit '@<id>' as there is only one instance.
4835 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4836 oop java_lang_ClassLoader::nameAndId(oop loader) {
4837 assert(is_instance(loader), "loader must be oop");
4838 return loader->obj_field(_nameAndId_offset);
4839 }
4840
4841 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4842 assert(is_instance(loader), "loader must be oop");
4843 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4844 oop acl = loader;
4845 debug_only(jint loop_count = 0);
4846 // This loop taken verbatim from ClassLoader.java:
4847 do {
4848 acl = parent(acl);
4849 if (cl == acl) {
4850 return true;
4851 }
4852 assert(++loop_count > 0, "loop_count overflow");
4853 } while (acl != nullptr);
4854 return false;
4855 }
4856
4857 bool java_lang_ClassLoader::is_instance(oop obj) {
4858 return obj != nullptr && is_subclass(obj->klass());
4859 }
4860
4861
4862 // For class loader classes, parallelCapable defined
4863 // based on non-null field
4864 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4865 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4866 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4867 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4868 }
4869
4870 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4871 oop cl = SystemDictionary::java_system_loader();
4872 while(cl != nullptr) {
4873 if (cl == loader) return true;
4874 cl = parent(cl);
4875 }
4876 return false;
4877 }
4878
4879 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4880 assert(is_instance(loader), "loader must be oop");
4881 return loader->obj_field(_unnamedModule_offset);
4882 }
4883
4884 // Support for java_lang_System
4885 //
4886
4887 int java_lang_System::_static_in_offset;
4888 int java_lang_System::_static_out_offset;
4889 int java_lang_System::_static_err_offset;
4890
4891 #define SYSTEM_FIELDS_DO(macro) \
4892 macro(_static_in_offset, k, "in", input_stream_signature, true); \
4893 macro(_static_out_offset, k, "out", print_stream_signature, true); \
4894 macro(_static_err_offset, k, "err", print_stream_signature, true);
4895
4896 void java_lang_System::compute_offsets() {
4897 InstanceKlass* k = vmClasses::System_klass();
4898 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4899 }
4900
4901 // This field tells us that a security manager can never be installed so we
4902 // can completely skip populating the ProtectionDomainCacheTable.
4903 bool java_lang_System::allow_security_manager() {
4904 return false;
4905 }
4906
4907 // This field tells us that a security manager is installed.
4908 bool java_lang_System::has_security_manager() {
4909 return false;
4910 }
4911
4912 #if INCLUDE_CDS
4913 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4914 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4915 }
4916 #endif
4917
4918 // Support for jdk_internal_misc_UnsafeConstants
4919 //
4920 class UnsafeConstantsFixup : public FieldClosure {
4921 private:
4922 int _address_size;
4923 int _page_size;
4924 bool _big_endian;
4925 bool _use_unaligned_access;
4926 int _data_cache_line_flush_size;
4927 public:
4928 UnsafeConstantsFixup() {
4929 // round up values for all static final fields
4930 _address_size = sizeof(void*);
4931 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4932 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4933 _use_unaligned_access = UseUnalignedAccesses;
4934 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4935 }
4936
4937 void do_field(fieldDescriptor* fd) {
4938 oop mirror = fd->field_holder()->java_mirror();
4939 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4940 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4941 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4942 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4943 if (fd->name() == vmSymbols::address_size_name()) {
4944 mirror->int_field_put(fd->offset(), _address_size);
4945 } else if (fd->name() == vmSymbols::page_size_name()) {
4946 mirror->int_field_put(fd->offset(), _page_size);
4947 } else if (fd->name() == vmSymbols::big_endian_name()) {
4948 mirror->bool_field_put(fd->offset(), _big_endian);
4949 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4950 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4951 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4952 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4953 } else {
4954 assert(false, "unexpected UnsafeConstants field");
4955 }
4956 }
4957 };
4958
4959 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4960 UnsafeConstantsFixup fixup;
4961 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4962 }
4963
4964
4965 // java_lang_StackTraceElement
4966
4967 int java_lang_StackTraceElement::_methodName_offset;
4968 int java_lang_StackTraceElement::_fileName_offset;
4969 int java_lang_StackTraceElement::_lineNumber_offset;
4970 int java_lang_StackTraceElement::_moduleName_offset;
4971 int java_lang_StackTraceElement::_moduleVersion_offset;
4972 int java_lang_StackTraceElement::_classLoaderName_offset;
4973 int java_lang_StackTraceElement::_declaringClass_offset;
4974 int java_lang_StackTraceElement::_declaringClassObject_offset;
4975
4976 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4977 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4978 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4979 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
4980 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4981 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
4982 macro(_methodName_offset, k, "methodName", string_signature, false); \
4983 macro(_fileName_offset, k, "fileName", string_signature, false); \
4984 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
4985
4986 // Support for java_lang_StackTraceElement
4987 void java_lang_StackTraceElement::compute_offsets() {
4988 InstanceKlass* k = vmClasses::StackTraceElement_klass();
4989 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4990 }
4991
4992 #if INCLUDE_CDS
4993 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4994 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4995 }
4996 #endif
4997
4998 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4999 element->obj_field_put(_fileName_offset, value);
5000 }
5001
5002 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
5003 element->obj_field_put(_declaringClass_offset, value);
5004 }
5005
5006 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
5007 element->obj_field_put(_methodName_offset, value);
5008 }
5009
5010 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
5011 element->int_field_put(_lineNumber_offset, value);
5012 }
5013
5014 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
5015 element->obj_field_put(_moduleName_offset, value);
5016 }
5017
5018 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
5019 element->obj_field_put(_moduleVersion_offset, value);
5020 }
5021
5022 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
5023 element->obj_field_put(_classLoaderName_offset, value);
5024 }
5025
5026 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
5027 element->obj_field_put(_declaringClassObject_offset, value);
5028 }
5029
5030
5031 // java_lang_AssertionStatusDirectives
5032
5033 int java_lang_AssertionStatusDirectives::_classes_offset;
5034 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
5035 int java_lang_AssertionStatusDirectives::_packages_offset;
5036 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
5037 int java_lang_AssertionStatusDirectives::_deflt_offset;
5038
5039 // Support for java Assertions - java_lang_AssertionStatusDirectives.
5040 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
5041 macro(_classes_offset, k, "classes", string_array_signature, false); \
5042 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
5043 macro(_packages_offset, k, "packages", string_array_signature, false); \
5044 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
5045 macro(_deflt_offset, k, "deflt", bool_signature, false)
5046
5047 void java_lang_AssertionStatusDirectives::compute_offsets() {
5048 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
5049 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5050 }
5051
5052 #if INCLUDE_CDS
5053 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
5054 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5055 }
5056 #endif
5057
5058 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
5059 o->obj_field_put(_classes_offset, val);
5060 }
5061
5062 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
5063 o->obj_field_put(_classEnabled_offset, val);
5064 }
5065
5066 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
5067 o->obj_field_put(_packages_offset, val);
5068 }
5069
5070 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
5071 o->obj_field_put(_packageEnabled_offset, val);
5072 }
5073
5074 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
5075 o->bool_field_put(_deflt_offset, val);
5076 }
5077
5078 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
5079
5080 #define AOS_FIELDS_DO(macro) \
5081 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
5082
5083 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
5084 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
5085 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5086 }
5087
5088 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
5089 assert(_owner_offset != 0, "Must be initialized");
5090 return obj->obj_field(_owner_offset);
5091 }
5092
5093 #if INCLUDE_CDS
5094 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
5095 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5096 }
5097 #endif
5098
5099 int vector_VectorPayload::_payload_offset;
5100
5101 #define VECTORPAYLOAD_FIELDS_DO(macro) \
5102 macro(_payload_offset, k, "payload", object_signature, false)
5103
5104 void vector_VectorPayload::compute_offsets() {
5105 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
5106 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5107 }
5108
5109 #if INCLUDE_CDS
5110 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
5111 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5112 }
5113 #endif
5114
5115 void vector_VectorPayload::set_payload(oop o, oop val) {
5116 o->obj_field_put(_payload_offset, val);
5117 }
5118
5119 bool vector_VectorPayload::is_instance(oop obj) {
5120 return obj != nullptr && is_subclass(obj->klass());
5121 }
5122
5123 int java_lang_Integer_IntegerCache::_static_cache_offset;
5124 int java_lang_Long_LongCache::_static_cache_offset;
5125 int java_lang_Character_CharacterCache::_static_cache_offset;
5126 int java_lang_Short_ShortCache::_static_cache_offset;
5127 int java_lang_Byte_ByteCache::_static_cache_offset;
5128
5129 #define INTEGER_CACHE_FIELDS_DO(macro) \
5130 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5131
5132 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5133 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5134 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5135 }
5136
5137 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5138 oop base = ik->static_field_base_raw();
5139 return objArrayOop(base->obj_field(_static_cache_offset));
5140 }
5141
5142 Symbol* java_lang_Integer_IntegerCache::symbol() {
5143 return vmSymbols::java_lang_Integer_IntegerCache();
5144 }
5145
5146 #if INCLUDE_CDS
5147 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5148 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5149 }
5150 #endif
5151 #undef INTEGER_CACHE_FIELDS_DO
5152
5153 jint java_lang_Integer::value(oop obj) {
5154 jvalue v;
5155 java_lang_boxing_object::get_value(obj, &v);
5156 return v.i;
5157 }
5158
5159 #define LONG_CACHE_FIELDS_DO(macro) \
5160 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5161
5162 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5163 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5164 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5165 }
5166
5167 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5168 oop base = ik->static_field_base_raw();
5169 return objArrayOop(base->obj_field(_static_cache_offset));
5170 }
5171
5172 Symbol* java_lang_Long_LongCache::symbol() {
5173 return vmSymbols::java_lang_Long_LongCache();
5174 }
5175
5176 #if INCLUDE_CDS
5177 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5178 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5179 }
5180 #endif
5181 #undef LONG_CACHE_FIELDS_DO
5182
5183 jlong java_lang_Long::value(oop obj) {
5184 jvalue v;
5185 java_lang_boxing_object::get_value(obj, &v);
5186 return v.j;
5187 }
5188
5189 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5190 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5191
5192 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5193 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5194 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5195 }
5196
5197 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5198 oop base = ik->static_field_base_raw();
5199 return objArrayOop(base->obj_field(_static_cache_offset));
5200 }
5201
5202 Symbol* java_lang_Character_CharacterCache::symbol() {
5203 return vmSymbols::java_lang_Character_CharacterCache();
5204 }
5205
5206 #if INCLUDE_CDS
5207 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5208 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5209 }
5210 #endif
5211 #undef CHARACTER_CACHE_FIELDS_DO
5212
5213 jchar java_lang_Character::value(oop obj) {
5214 jvalue v;
5215 java_lang_boxing_object::get_value(obj, &v);
5216 return v.c;
5217 }
5218
5219 #define SHORT_CACHE_FIELDS_DO(macro) \
5220 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5221
5222 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5223 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5224 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5225 }
5226
5227 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5228 oop base = ik->static_field_base_raw();
5229 return objArrayOop(base->obj_field(_static_cache_offset));
5230 }
5231
5232 Symbol* java_lang_Short_ShortCache::symbol() {
5233 return vmSymbols::java_lang_Short_ShortCache();
5234 }
5235
5236 #if INCLUDE_CDS
5237 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5238 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5239 }
5240 #endif
5241 #undef SHORT_CACHE_FIELDS_DO
5242
5243 jshort java_lang_Short::value(oop obj) {
5244 jvalue v;
5245 java_lang_boxing_object::get_value(obj, &v);
5246 return v.s;
5247 }
5248
5249 #define BYTE_CACHE_FIELDS_DO(macro) \
5250 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5251
5252 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5253 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5254 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5255 }
5256
5257 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5258 oop base = ik->static_field_base_raw();
5259 return objArrayOop(base->obj_field(_static_cache_offset));
5260 }
5261
5262 Symbol* java_lang_Byte_ByteCache::symbol() {
5263 return vmSymbols::java_lang_Byte_ByteCache();
5264 }
5265
5266 #if INCLUDE_CDS
5267 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5268 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5269 }
5270 #endif
5271 #undef BYTE_CACHE_FIELDS_DO
5272
5273 jbyte java_lang_Byte::value(oop obj) {
5274 jvalue v;
5275 java_lang_boxing_object::get_value(obj, &v);
5276 return v.b;
5277 }
5278
5279 int java_lang_Boolean::_static_TRUE_offset;
5280 int java_lang_Boolean::_static_FALSE_offset;
5281
5282 #define BOOLEAN_FIELDS_DO(macro) \
5283 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5284 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5285
5286
5287 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5288 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5289 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5290 }
5291
5292 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5293 oop base = ik->static_field_base_raw();
5294 return base->obj_field(_static_TRUE_offset);
5295 }
5296
5297 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5298 oop base = ik->static_field_base_raw();
5299 return base->obj_field(_static_FALSE_offset);
5300 }
5301
5302 Symbol* java_lang_Boolean::symbol() {
5303 return vmSymbols::java_lang_Boolean();
5304 }
5305
5306 #if INCLUDE_CDS
5307 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5308 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5309 }
5310 #endif
5311 #undef BOOLEAN_CACHE_FIELDS_DO
5312
5313 jboolean java_lang_Boolean::value(oop obj) {
5314 jvalue v;
5315 java_lang_boxing_object::get_value(obj, &v);
5316 return v.z;
5317 }
5318
5319 // java_lang_reflect_RecordComponent
5320
5321 int java_lang_reflect_RecordComponent::_clazz_offset;
5322 int java_lang_reflect_RecordComponent::_name_offset;
5323 int java_lang_reflect_RecordComponent::_type_offset;
5324 int java_lang_reflect_RecordComponent::_accessor_offset;
5325 int java_lang_reflect_RecordComponent::_signature_offset;
5326 int java_lang_reflect_RecordComponent::_annotations_offset;
5327 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5328
5329 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5330 macro(_clazz_offset, k, "clazz", class_signature, false); \
5331 macro(_name_offset, k, "name", string_signature, false); \
5332 macro(_type_offset, k, "type", class_signature, false); \
5333 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5334 macro(_signature_offset, k, "signature", string_signature, false); \
5335 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5336 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5337
5338 // Support for java_lang_reflect_RecordComponent
5339 void java_lang_reflect_RecordComponent::compute_offsets() {
5340 InstanceKlass* k = vmClasses::RecordComponent_klass();
5341 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5342 }
5343
5344 #if INCLUDE_CDS
5345 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5346 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5347 }
5348 #endif
5349
5350 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5351 element->obj_field_put(_clazz_offset, value);
5352 }
5353
5354 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5355 element->obj_field_put(_name_offset, value);
5356 }
5357
5358 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5359 element->obj_field_put(_type_offset, value);
5360 }
5361
5362 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5363 element->obj_field_put(_accessor_offset, value);
5364 }
5365
5366 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5367 element->obj_field_put(_signature_offset, value);
5368 }
5369
5370 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5371 element->obj_field_put(_annotations_offset, value);
5372 }
5373
5374 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5375 element->obj_field_put(_typeAnnotations_offset, value);
5376 }
5377
5378 // java_lang_InternalError
5379 int java_lang_InternalError::_during_unsafe_access_offset;
5380
5381 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5382 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5383 }
5384
5385 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5386 return internal_error->bool_field(_during_unsafe_access_offset);
5387 }
5388
5389 void java_lang_InternalError::compute_offsets() {
5390 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5391 }
5392
5393 #if INCLUDE_CDS
5394 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5395 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5396 }
5397 #endif
5398
5399 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5400 f(java_lang_Class) \
5401 f(java_lang_String) \
5402 f(java_lang_ref_Reference) \
5403 //end
5404
5405 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5406 f(java_lang_System) \
5407 f(java_lang_ClassLoader) \
5408 f(java_lang_Throwable) \
5409 f(java_lang_Thread) \
5410 f(java_lang_Thread_FieldHolder) \
5411 f(java_lang_Thread_Constants) \
5412 f(java_lang_ThreadGroup) \
5413 f(java_lang_VirtualThread) \
5414 f(java_lang_InternalError) \
5415 f(java_lang_AssertionStatusDirectives) \
5416 f(java_lang_ref_SoftReference) \
5417 f(java_lang_invoke_MethodHandle) \
5418 f(java_lang_invoke_DirectMethodHandle) \
5419 f(java_lang_invoke_MemberName) \
5420 f(java_lang_invoke_ResolvedMethodName) \
5421 f(java_lang_invoke_LambdaForm) \
5422 f(java_lang_invoke_MethodType) \
5423 f(java_lang_invoke_CallSite) \
5424 f(java_lang_invoke_ConstantCallSite) \
5425 f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \
5426 f(java_security_AccessControlContext) \
5427 f(java_lang_reflect_AccessibleObject) \
5428 f(java_lang_reflect_Method) \
5429 f(java_lang_reflect_Constructor) \
5430 f(java_lang_reflect_Field) \
5431 f(java_lang_reflect_RecordComponent) \
5432 f(reflect_ConstantPool) \
5433 f(java_lang_reflect_Parameter) \
5434 f(java_lang_Module) \
5435 f(java_lang_StackTraceElement) \
5436 f(java_lang_ClassFrameInfo) \
5437 f(java_lang_StackFrameInfo) \
5438 f(java_lang_LiveStackFrameInfo) \
5439 f(jdk_internal_vm_ContinuationScope) \
5440 f(jdk_internal_vm_Continuation) \
5441 f(jdk_internal_vm_StackChunk) \
5442 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5443 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5444 f(jdk_internal_foreign_abi_ABIDescriptor) \
5445 f(jdk_internal_foreign_abi_VMStorage) \
5446 f(jdk_internal_foreign_abi_CallConv) \
5447 f(jdk_internal_misc_UnsafeConstants) \
5448 f(java_lang_boxing_object) \
5449 f(vector_VectorPayload) \
5450 //end
5451
5452 #define BASIC_JAVA_CLASSES_DO(f) \
5453 BASIC_JAVA_CLASSES_DO_PART1(f) \
5454 BASIC_JAVA_CLASSES_DO_PART2(f)
5455
5456 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5457
5458 // Compute field offsets of all the classes in this file
5459 void JavaClasses::compute_offsets() {
5460 if (CDSConfig::is_using_archive()) {
5461 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5462 JvmtiExport::has_early_class_hook_env()),
5463 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5464 // None of the classes used by the rest of this function can be replaced by
5465 // JVMTI ClassFileLoadHook.
5466 // We are safe to use the archived offsets, which have already been restored
5467 // by JavaClasses::serialize_offsets, without computing the offsets again.
5468 return;
5469 }
5470
5471 // We have already called the compute_offsets() of the
5472 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5473 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5474 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5475 }
5476
5477 #if INCLUDE_CDS
5478 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5479
5480 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5481 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5482 }
5483 #endif
5484
5485 #if INCLUDE_CDS_JAVA_HEAP
5486 bool JavaClasses::is_supported_for_archiving(oop obj) {
5487 Klass* klass = obj->klass();
5488
5489 if (!CDSConfig::is_dumping_invokedynamic()) {
5490 // These are supported by CDS only when CDSConfig::is_dumping_invokedynamic() is enabled.
5491 if (klass == vmClasses::ResolvedMethodName_klass() ||
5492 klass == vmClasses::MemberName_klass() ||
5493 klass == vmClasses::Context_klass()) {
5494 return false;
5495 }
5496 }
5497
5498 if (klass->is_subclass_of(vmClasses::Reference_klass())) {
5499 // It's problematic to archive Reference objects. One of the reasons is that
5500 // Reference::discovered may pull in unwanted objects (see JDK-8284336)
5501 return false;
5502 }
5503
5504 return true;
5505 }
5506 #endif
5507
5508 #ifndef PRODUCT
5509
5510 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5511
5512 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5513 const char* field_sig) {
5514 EXCEPTION_MARK;
5515 fieldDescriptor fd;
5516 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5517 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5518 InstanceKlass* ik = InstanceKlass::cast(k);
5519 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5520 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5521 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5522 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5523 return false;
5524 }
5525 if (fd.is_static()) {
5526 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5527 return false;
5528 }
5529 if (fd.offset() == deserialized_offset ) {
5530 return true;
5531 } else {
5532 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5533 klass_name, field_name, deserialized_offset, fd.offset());
5534 return false;
5535 }
5536 }
5537
5538 void JavaClasses::check_offsets() {
5539 bool valid = true;
5540
5541 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5542 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5543
5544 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5545 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5546
5547 // Boxed primitive objects (java_lang_boxing_object)
5548
5549 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
5550 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5551 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
5552 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5553 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
5554 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
5555 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
5556 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5557
5558 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5559 }
5560
5561 #endif // PRODUCT
5562
5563 int InjectedField::compute_offset() {
5564 InstanceKlass* ik = InstanceKlass::cast(klass());
5565 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5566 if (!may_be_java && !fs.field_flags().is_injected()) {
5567 // Only look at injected fields
5568 continue;
5569 }
5570 if (fs.name() == name() && fs.signature() == signature()) {
5571 return fs.offset();
5572 }
5573 }
5574 ResourceMark rm;
5575 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)" : "");
5576 #ifndef PRODUCT
5577 ik->print();
5578 tty->print_cr("all fields:");
5579 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5580 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
5581 }
5582 #endif //PRODUCT
5583 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5584 return -1;
5585 }
5586
5587 void javaClasses_init() {
5588 JavaClasses::compute_offsets();
5589 JavaClasses::check_offsets();
5590 FilteredFieldsMap::initialize(); // must be done after computing offsets.
5591 }