1 /*
2 * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "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 // Class_klass has to be loaded because it is used to allocate
1117 // the mirror.
1118 if (vmClasses::Class_klass_loaded()) {
1119 Handle mirror;
1120 Handle comp_mirror;
1121
1122 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1123
1124 // set the classLoader field in the java_lang_Class instance
1125 assert(class_loader() == k->class_loader(), "should be same");
1126 set_class_loader(mirror(), class_loader());
1127
1128 // Setup indirection from klass->mirror
1129 // after any exceptions can happen during allocations.
1130 k->set_java_mirror(mirror);
1131
1132 // Set the module field in the java_lang_Class instance. This must be done
1133 // after the mirror is set.
1134 set_mirror_module_field(THREAD, k, mirror, module);
1135
1136 if (comp_mirror() != nullptr) {
1137 // Set after k->java_mirror() is published, because compiled code running
1138 // concurrently doesn't expect a k to have a null java_mirror.
1139 release_set_array_klass(comp_mirror(), k);
1140 }
1141 if (CDSConfig::is_dumping_heap()) {
1142 if (CDSConfig::is_dumping_protection_domains()) {
1143 create_scratch_mirror(k, protection_domain, CHECK);
1144 } else {
1145 create_scratch_mirror(k, Handle() /* null protection_domain*/, CHECK);
1146 }
1147 }
1148 } else {
1149 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1150 fixup_mirror_list()->push(k);
1151 }
1152 }
1153
1154 #if INCLUDE_CDS_JAVA_HEAP
1155 // The "scratch mirror" stores the states of the mirror object that can be
1156 // decided at dump time (such as the initial values of the static fields, the
1157 // component mirror, etc). At runtime, more information is added to it by
1158 // java_lang_Class::restore_archived_mirror().
1159 //
1160 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1161 // produces the same result as /*runtime*/create_mirror().
1162 //
1163 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1164 // latter may contain dumptime-specific information that cannot be archived
1165 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1166 void java_lang_Class::create_scratch_mirror(Klass* k, Handle protection_domain, TRAPS) {
1167 if (k->class_loader() != nullptr &&
1168 k->class_loader() != SystemDictionary::java_platform_loader() &&
1169 k->class_loader() != SystemDictionary::java_system_loader()) {
1170 // We only archive the mirrors of classes loaded by the built-in loaders
1171 return;
1172 }
1173
1174 Handle classData; // set to null. Will be reinitialized at runtime
1175 Handle mirror;
1176 Handle comp_mirror;
1177 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1178
1179 if (comp_mirror() != nullptr) {
1180 release_set_array_klass(comp_mirror(), k);
1181 }
1182
1183 HeapShared::set_scratch_java_mirror(k, mirror());
1184 }
1185
1186 // Returns true if the mirror is updated, false if no archived mirror
1187 // data is present. After the archived mirror object is restored, the
1188 // shared klass' _has_raw_archived_mirror flag is cleared.
1189 bool java_lang_Class::restore_archived_mirror(Klass *k,
1190 Handle class_loader, Handle module,
1191 Handle protection_domain, TRAPS) {
1192 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1193 // see more details in vmClasses::resolve_all().
1194 if (!vmClasses::Class_klass_loaded()) {
1195 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1196 fixup_mirror_list()->push(k);
1197 return true;
1198 }
1199
1200 oop m = k->archived_java_mirror();
1201 assert(m != nullptr, "must have stored non-null archived mirror");
1202
1203 // Sanity: clear it now to prevent re-initialization if any of the following fails
1204 k->clear_archived_mirror_index();
1205
1206 // mirror is archived, restore
1207 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1208 assert(as_Klass(m) == k, "must be");
1209 Handle mirror(THREAD, m);
1210
1211 if (!k->is_array_klass()) {
1212 // - local static final fields with initial values were initialized at dump time
1213
1214 // create the init_lock
1215 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1216 set_init_lock(mirror(), r);
1217
1218 if (protection_domain.not_null()) {
1219 set_protection_domain(mirror(), protection_domain());
1220 }
1221 }
1222
1223 assert(class_loader() == k->class_loader(), "should be same");
1224 if (class_loader.not_null()) {
1225 set_class_loader(mirror(), class_loader());
1226 }
1227
1228 k->set_java_mirror(mirror);
1229
1230 set_mirror_module_field(THREAD, k, mirror, module);
1231
1232 if (log_is_enabled(Trace, cds, heap, mirror)) {
1233 ResourceMark rm(THREAD);
1234 log_trace(cds, heap, mirror)(
1235 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1236 }
1237
1238 return true;
1239 }
1240 #endif // INCLUDE_CDS_JAVA_HEAP
1241
1242 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1243 assert(_module_offset != 0, "must have been computed already");
1244 set_module(k->java_mirror(), module());
1245 }
1246
1247 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1248 assert(_oop_size_offset != 0, "must be set");
1249 assert(size > 0, "Oop size must be greater than zero, not " SIZE_FORMAT, size);
1250 assert(size <= INT_MAX, "Lossy conversion: " SIZE_FORMAT, size);
1251 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1252 }
1253
1254 int java_lang_Class::static_oop_field_count(oop java_class) {
1255 assert(_static_oop_field_count_offset != 0, "must be set");
1256 return java_class->int_field(_static_oop_field_count_offset);
1257 }
1258
1259 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1260 assert(_static_oop_field_count_offset != 0, "must be set");
1261 java_class->int_field_put(_static_oop_field_count_offset, size);
1262 }
1263
1264 oop java_lang_Class::protection_domain(oop java_class) {
1265 assert(_protection_domain_offset != 0, "must be set");
1266 return java_class->obj_field(_protection_domain_offset);
1267 }
1268 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1269 assert(_protection_domain_offset != 0, "must be set");
1270 java_class->obj_field_put(_protection_domain_offset, pd);
1271 }
1272
1273 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1274 assert(_component_mirror_offset != 0, "must be set");
1275 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1276 }
1277 oop java_lang_Class::component_mirror(oop java_class) {
1278 assert(_component_mirror_offset != 0, "must be set");
1279 return java_class->obj_field(_component_mirror_offset);
1280 }
1281
1282 oop java_lang_Class::init_lock(oop java_class) {
1283 assert(_init_lock_offset != 0, "must be set");
1284 return java_class->obj_field(_init_lock_offset);
1285 }
1286 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1287 assert(_init_lock_offset != 0, "must be set");
1288 java_class->obj_field_put(_init_lock_offset, init_lock);
1289 }
1290
1291 objArrayOop java_lang_Class::signers(oop java_class) {
1292 assert(_signers_offset != 0, "must be set");
1293 return (objArrayOop)java_class->obj_field(_signers_offset);
1294 }
1295
1296 oop java_lang_Class::class_data(oop java_class) {
1297 assert(_classData_offset != 0, "must be set");
1298 return java_class->obj_field(_classData_offset);
1299 }
1300 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1301 assert(_classData_offset != 0, "must be set");
1302 java_class->obj_field_put(_classData_offset, class_data);
1303 }
1304
1305 oop java_lang_Class::reflection_data(oop java_class) {
1306 assert(_reflectionData_offset != 0, "must be set");
1307 return java_class->obj_field(_reflectionData_offset);
1308 }
1309
1310 bool java_lang_Class::has_reflection_data(oop java_class) {
1311 return (java_lang_Class::reflection_data(java_class) != nullptr);
1312 }
1313
1314 void java_lang_Class::set_reflection_data(oop java_class, oop reflection_data) {
1315 assert(_reflectionData_offset != 0, "must be set");
1316 java_class->obj_field_put(_reflectionData_offset, reflection_data);
1317 }
1318
1319 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1320 assert(_class_loader_offset != 0, "offsets should have been initialized");
1321 java_class->obj_field_put(_class_loader_offset, loader);
1322 }
1323
1324 oop java_lang_Class::class_loader(oop java_class) {
1325 assert(_class_loader_offset != 0, "must be set");
1326 return java_class->obj_field(_class_loader_offset);
1327 }
1328
1329 oop java_lang_Class::module(oop java_class) {
1330 assert(_module_offset != 0, "must be set");
1331 return java_class->obj_field(_module_offset);
1332 }
1333
1334 void java_lang_Class::set_module(oop java_class, oop module) {
1335 assert(_module_offset != 0, "must be set");
1336 java_class->obj_field_put(_module_offset, module);
1337 }
1338
1339 oop java_lang_Class::name(Handle java_class, TRAPS) {
1340 assert(_name_offset != 0, "must be set");
1341 oop o = java_class->obj_field(_name_offset);
1342 if (o == nullptr) {
1343 o = StringTable::intern(as_external_name(java_class()), THREAD);
1344 java_class->obj_field_put(_name_offset, o);
1345 }
1346 return o;
1347 }
1348
1349 oop java_lang_Class::source_file(oop java_class) {
1350 assert(_source_file_offset != 0, "must be set");
1351 return java_class->obj_field(_source_file_offset);
1352 }
1353
1354 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1355 assert(_source_file_offset != 0, "must be set");
1356 java_class->obj_field_put(_source_file_offset, source_file);
1357 }
1358
1359 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1360 // This should be improved by adding a field at the Java level or by
1361 // introducing a new VM klass (see comment in ClassFileParser)
1362 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1363 if (type != T_VOID) {
1364 Klass* aklass = Universe::typeArrayKlass(type);
1365 assert(aklass != nullptr, "correct bootstrap");
1366 release_set_array_klass(java_class, aklass);
1367 }
1368 #ifdef ASSERT
1369 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1370 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1371 #endif
1372 return java_class;
1373 }
1374
1375 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1376 assert(is_instance(java_class), "must be a Class object");
1377 java_class->metadata_field_put(_klass_offset, klass);
1378 }
1379
1380
1381 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1382 assert(is_instance(java_class), "must be a Class object");
1383 Symbol* name = nullptr;
1384 bool is_instance = false;
1385 if (is_primitive(java_class)) {
1386 name = vmSymbols::type_signature(primitive_type(java_class));
1387 } else {
1388 Klass* k = as_Klass(java_class);
1389 is_instance = k->is_instance_klass();
1390 name = k->name();
1391 }
1392 if (name == nullptr) {
1393 st->print("<null>");
1394 return;
1395 }
1396 if (is_instance) st->print("L");
1397 st->write((char*) name->base(), (int) name->utf8_length());
1398 if (is_instance) st->print(";");
1399 }
1400
1401 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1402 assert(is_instance(java_class), "must be a Class object");
1403 Symbol* name;
1404 if (is_primitive(java_class)) {
1405 name = vmSymbols::type_signature(primitive_type(java_class));
1406 // Because this can create a new symbol, the caller has to decrement
1407 // the refcount, so make adjustment here and below for symbols returned
1408 // that are not created or incremented due to a successful lookup.
1409 name->increment_refcount();
1410 } else {
1411 Klass* k = as_Klass(java_class);
1412 if (!k->is_instance_klass()) {
1413 name = k->name();
1414 name->increment_refcount();
1415 } else {
1416 ResourceMark rm;
1417 const char* sigstr = k->signature_name();
1418 int siglen = (int) strlen(sigstr);
1419 if (!intern_if_not_found) {
1420 name = SymbolTable::probe(sigstr, siglen);
1421 } else {
1422 name = SymbolTable::new_symbol(sigstr, siglen);
1423 }
1424 }
1425 }
1426 return name;
1427 }
1428
1429 // Returns the Java name for this Java mirror (Resource allocated)
1430 // See Klass::external_name().
1431 // For primitive type Java mirrors, its type name is returned.
1432 const char* java_lang_Class::as_external_name(oop java_class) {
1433 assert(is_instance(java_class), "must be a Class object");
1434 const char* name = nullptr;
1435 if (is_primitive(java_class)) {
1436 name = type2name(primitive_type(java_class));
1437 } else {
1438 name = as_Klass(java_class)->external_name();
1439 }
1440 if (name == nullptr) {
1441 name = "<null>";
1442 }
1443 return name;
1444 }
1445
1446 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1447 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1448 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass");
1449 return k;
1450 }
1451
1452
1453 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1454 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1455 java_class->release_metadata_field_put(_array_klass_offset, klass);
1456 }
1457
1458
1459 BasicType java_lang_Class::primitive_type(oop java_class) {
1460 assert(is_primitive(java_class), "just checking");
1461 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1462 BasicType type = T_VOID;
1463 if (ak != nullptr) {
1464 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1465 type = ArrayKlass::cast(ak)->element_type();
1466 } else {
1467 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1468 }
1469 #ifdef ASSERT
1470 if (CDSConfig::is_dumping_heap()) {
1471 oop mirror = Universe::java_mirror(type);
1472 oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1473 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1474 } else {
1475 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1476 }
1477 #endif
1478 return type;
1479 }
1480
1481 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1482 assert(is_instance(java_class), "must be a Class object");
1483 if (is_primitive(java_class)) {
1484 if (reference_klass != nullptr)
1485 (*reference_klass) = nullptr;
1486 return primitive_type(java_class);
1487 } else {
1488 if (reference_klass != nullptr)
1489 (*reference_klass) = as_Klass(java_class);
1490 return T_OBJECT;
1491 }
1492 }
1493
1494
1495 oop java_lang_Class::primitive_mirror(BasicType t) {
1496 oop mirror = Universe::java_mirror(t);
1497 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1498 assert(is_primitive(mirror), "must be primitive");
1499 return mirror;
1500 }
1501
1502 #define CLASS_FIELDS_DO(macro) \
1503 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1504 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1505 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1506 macro(_module_offset, k, "module", module_signature, false); \
1507 macro(_name_offset, k, "name", string_signature, false); \
1508 macro(_classData_offset, k, "classData", object_signature, false); \
1509 macro(_reflectionData_offset, k, "reflectionData", class_ReflectionData_signature, false); \
1510 macro(_signers_offset, k, "signers", object_array_signature, false);
1511
1512 void java_lang_Class::compute_offsets() {
1513 if (_offsets_computed) {
1514 return;
1515 }
1516
1517 _offsets_computed = true;
1518
1519 InstanceKlass* k = vmClasses::Class_klass();
1520 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1521 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1522 }
1523
1524 #if INCLUDE_CDS
1525 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1526 f->do_bool(&_offsets_computed);
1527
1528 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1529
1530 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1531 }
1532 #endif
1533
1534 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1535 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1536 return the_class_mirror->int_field(_classRedefinedCount_offset);
1537 }
1538
1539 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1540 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1541 the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1542 }
1543
1544
1545 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1546 // platform thread structure, and a eetop offset which was used for thread
1547 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1548 // merged, so in the HotSpot VM we just use the eetop field for the thread
1549 // instead of the privateInfo_offset.
1550 //
1551 // Note: The stackSize field is only present starting in 1.4.
1552
1553 int java_lang_Thread_FieldHolder::_group_offset;
1554 int java_lang_Thread_FieldHolder::_priority_offset;
1555 int java_lang_Thread_FieldHolder::_stackSize_offset;
1556 int java_lang_Thread_FieldHolder::_daemon_offset;
1557 int java_lang_Thread_FieldHolder::_thread_status_offset;
1558
1559 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1560 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1561 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1562 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1563 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1564 macro(_thread_status_offset, k, "threadStatus", int_signature, false)
1565
1566 void java_lang_Thread_FieldHolder::compute_offsets() {
1567 assert(_group_offset == 0, "offsets should be initialized only once");
1568
1569 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1570 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1571 }
1572
1573 #if INCLUDE_CDS
1574 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1575 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1576 }
1577 #endif
1578
1579 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1580 return holder->obj_field(_group_offset);
1581 }
1582
1583 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1584 return (ThreadPriority)holder->int_field(_priority_offset);
1585 }
1586
1587 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1588 holder->int_field_put(_priority_offset, priority);
1589 }
1590
1591 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1592 return holder->long_field(_stackSize_offset);
1593 }
1594
1595 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1596 return holder->bool_field(_daemon_offset) != 0;
1597 }
1598
1599 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1600 assert(val, "daemon status is never turned off");
1601 holder->bool_field_put(_daemon_offset, val);
1602 }
1603
1604 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1605 holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1606 }
1607
1608 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1609 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1610 }
1611
1612
1613 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1614
1615 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1616 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true);
1617
1618 void java_lang_Thread_Constants::compute_offsets() {
1619 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1620
1621 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1622 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1623 }
1624
1625 #if INCLUDE_CDS
1626 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1627 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1628 }
1629 #endif
1630
1631 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1632 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1633 oop base = k->static_field_base_raw();
1634 return base->obj_field(_static_VTHREAD_GROUP_offset);
1635 }
1636
1637
1638 int java_lang_Thread::_holder_offset;
1639 int java_lang_Thread::_name_offset;
1640 int java_lang_Thread::_contextClassLoader_offset;
1641 int java_lang_Thread::_eetop_offset;
1642 int java_lang_Thread::_jvmti_thread_state_offset;
1643 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1644 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1645 int java_lang_Thread::_interrupted_offset;
1646 int java_lang_Thread::_interruptLock_offset;
1647 int java_lang_Thread::_tid_offset;
1648 int java_lang_Thread::_continuation_offset;
1649 int java_lang_Thread::_park_blocker_offset;
1650 int java_lang_Thread::_scopedValueBindings_offset;
1651 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1652
1653 #define THREAD_FIELDS_DO(macro) \
1654 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \
1655 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1656 macro(_contextClassLoader_offset, k, "contextClassLoader", classloader_signature, false); \
1657 macro(_eetop_offset, k, "eetop", long_signature, false); \
1658 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1659 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \
1660 macro(_tid_offset, k, "tid", long_signature, false); \
1661 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1662 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1663 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1664
1665 void java_lang_Thread::compute_offsets() {
1666 assert(_holder_offset == 0, "offsets should be initialized only once");
1667
1668 InstanceKlass* k = vmClasses::Thread_klass();
1669 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1670 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1671 }
1672
1673 #if INCLUDE_CDS
1674 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1675 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1676 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1677 }
1678 #endif
1679
1680 JavaThread* java_lang_Thread::thread(oop java_thread) {
1681 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1682 }
1683
1684 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1685 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1686 }
1687
1688 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1689 java_thread->address_field_put(_eetop_offset, (address)thread);
1690 }
1691
1692 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1693 java_thread->release_address_field_put(_eetop_offset, (address)thread);
1694 }
1695
1696 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1697 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1698 }
1699
1700 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1701 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1702 }
1703
1704 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1705 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1706 }
1707
1708 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1709 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1710 int val = VTMS_transition_disable_count(java_thread);
1711 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1712 }
1713
1714 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1715 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1716 int val = VTMS_transition_disable_count(java_thread);
1717 assert(val > 0, "VTMS_transition_disable_count should never be negative");
1718 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1719 }
1720
1721 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1722 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1723 }
1724
1725 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1726 assert(is_in_VTMS_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside");
1727 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1728 }
1729
1730 int java_lang_Thread::is_in_VTMS_transition_offset() {
1731 return _jvmti_is_in_VTMS_transition_offset;
1732 }
1733
1734 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1735 assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1736 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1737 }
1738
1739 oop java_lang_Thread::holder(oop java_thread) {
1740 // Note: may return null if the thread is still attaching
1741 return java_thread->obj_field(_holder_offset);
1742 }
1743 oop java_lang_Thread::interrupt_lock(oop java_thread) {
1744 return java_thread->obj_field(_interruptLock_offset);
1745 }
1746
1747 bool java_lang_Thread::interrupted(oop java_thread) {
1748 // Make sure the caller can safely access oops.
1749 assert(Thread::current()->is_VM_thread() ||
1750 (JavaThread::current()->thread_state() != _thread_blocked &&
1751 JavaThread::current()->thread_state() != _thread_in_native),
1752 "Unsafe access to oop");
1753 return java_thread->bool_field_volatile(_interrupted_offset);
1754 }
1755
1756 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1757 // Make sure the caller can safely access oops.
1758 assert(Thread::current()->is_VM_thread() ||
1759 (JavaThread::current()->thread_state() != _thread_blocked &&
1760 JavaThread::current()->thread_state() != _thread_in_native),
1761 "Unsafe access to oop");
1762 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1763 }
1764
1765
1766 oop java_lang_Thread::name(oop java_thread) {
1767 return java_thread->obj_field(_name_offset);
1768 }
1769
1770
1771 void java_lang_Thread::set_name(oop java_thread, oop name) {
1772 java_thread->obj_field_put(_name_offset, name);
1773 }
1774
1775 // Convenience macros for setting and getting Thread fields that
1776 // are actually stored in the FieldHolder object of the thread.
1777 // The FieldHolder can be null whilst a thread is attaching via
1778 // JNI, and when the main thread is attaching.
1779
1780 // The default value should be the default/zero initialized value
1781 // of the field as it would be in java.lang.Thread.FieldHolder.
1782 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \
1783 { \
1784 oop holder = java_lang_Thread::holder(java_thread); \
1785 if (holder != nullptr) \
1786 return java_lang_Thread_FieldHolder::field(holder); \
1787 else \
1788 return default_val; \
1789 }
1790
1791 // We should never be trying to set a field of an attaching thread.
1792 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \
1793 { \
1794 oop holder = java_lang_Thread::holder(java_thread); \
1795 assert(holder != nullptr, "Thread not fully initialized"); \
1796 java_lang_Thread_FieldHolder::set_##field(holder, value); \
1797 }
1798
1799
1800 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1801 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1802 }
1803
1804
1805 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1806 SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1807 }
1808
1809
1810 oop java_lang_Thread::threadGroup(oop java_thread) {
1811 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1812 }
1813
1814
1815 bool java_lang_Thread::is_alive(oop java_thread) {
1816 JavaThread* thr = java_lang_Thread::thread(java_thread);
1817 return (thr != nullptr);
1818 }
1819
1820
1821 bool java_lang_Thread::is_daemon(oop java_thread) {
1822 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1823 }
1824
1825
1826 void java_lang_Thread::set_daemon(oop java_thread) {
1827 SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1828 }
1829
1830 oop java_lang_Thread::context_class_loader(oop java_thread) {
1831 return java_thread->obj_field(_contextClassLoader_offset);
1832 }
1833
1834
1835 jlong java_lang_Thread::stackSize(oop java_thread) {
1836 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1837 }
1838
1839 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1840 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1841 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1842 }
1843
1844 // Read thread status value from threadStatus field in java.lang.Thread java class.
1845 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1846 // Make sure the caller is operating on behalf of the VM or is
1847 // running VM code (state == _thread_in_vm).
1848 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1849 JavaThread::current()->thread_state() == _thread_in_vm,
1850 "Java Thread is not running in vm");
1851 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1852 }
1853
1854 ByteSize java_lang_Thread::thread_id_offset() {
1855 return in_ByteSize(_tid_offset);
1856 }
1857
1858 oop java_lang_Thread::park_blocker(oop java_thread) {
1859 return java_thread->obj_field(_park_blocker_offset);
1860 }
1861
1862 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) {
1863 ThreadsListHandle tlh(JavaThread::current());
1864 JavaThread* thread;
1865 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread);
1866 if (is_virtual) {
1867 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread);
1868 if (carrier_thread == nullptr) {
1869 return nullptr;
1870 }
1871 thread = java_lang_Thread::thread(carrier_thread);
1872 } else {
1873 thread = java_lang_Thread::thread(java_thread);
1874 }
1875 if (thread == nullptr) {
1876 return nullptr;
1877 }
1878
1879 class GetStackTraceClosure : public HandshakeClosure {
1880 public:
1881 const Handle _java_thread;
1882 int _depth;
1883 bool _retry_handshake;
1884 GrowableArray<Method*>* _methods;
1885 GrowableArray<int>* _bcis;
1886
1887 GetStackTraceClosure(Handle java_thread) :
1888 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false),
1889 _methods(nullptr), _bcis(nullptr) {
1890 }
1891 ~GetStackTraceClosure() {
1892 delete _methods;
1893 delete _bcis;
1894 }
1895
1896 bool read_reset_retry() {
1897 bool ret = _retry_handshake;
1898 // If we re-execute the handshake this method need to return false
1899 // when the handshake cannot be performed. (E.g. thread terminating)
1900 _retry_handshake = false;
1901 return ret;
1902 }
1903
1904 void do_thread(Thread* th) {
1905 if (!Thread::current()->is_Java_thread()) {
1906 _retry_handshake = true;
1907 return;
1908 }
1909
1910 JavaThread* thread = JavaThread::cast(th);
1911
1912 if (!thread->has_last_Java_frame()) {
1913 return;
1914 }
1915
1916 bool carrier = false;
1917 if (java_lang_VirtualThread::is_instance(_java_thread())) {
1918 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
1919 const ContinuationEntry* ce = thread->vthread_continuation();
1920 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) {
1921 return; // not mounted
1922 }
1923 } else {
1924 carrier = (thread->vthread_continuation() != nullptr);
1925 }
1926
1927 const int max_depth = MaxJavaStackTraceDepth;
1928 const bool skip_hidden = !ShowHiddenFrames;
1929
1930 // Pick minimum length that will cover most cases
1931 int init_length = 64;
1932 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1933 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
1934
1935 int total_count = 0;
1936 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops
1937 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
1938 vfst.next()) {
1939
1940 if (skip_hidden && (vfst.method()->is_hidden() ||
1941 vfst.method()->is_continuation_enter_intrinsic())) {
1942 continue;
1943 }
1944
1945 _methods->push(vfst.method());
1946 _bcis->push(vfst.bci());
1947 total_count++;
1948 }
1949
1950 _depth = total_count;
1951 }
1952 };
1953
1954 // Handshake with target
1955 ResourceMark rm(THREAD);
1956 HandleMark hm(THREAD);
1957 GetStackTraceClosure gstc(Handle(THREAD, java_thread));
1958 do {
1959 Handshake::execute(&gstc, &tlh, thread);
1960 } while (gstc.read_reset_retry());
1961
1962 // Stop if no stack trace is found.
1963 if (gstc._depth == 0) {
1964 return nullptr;
1965 }
1966
1967 // Convert to StackTraceElement array
1968 InstanceKlass* k = vmClasses::StackTraceElement_klass();
1969 assert(k != nullptr, "must be loaded in 1.4+");
1970 if (k->should_be_initialized()) {
1971 k->initialize(CHECK_NULL);
1972 }
1973 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL);
1974
1975 for (int i = 0; i < gstc._depth; i++) {
1976 methodHandle method(THREAD, gstc._methods->at(i));
1977 oop element = java_lang_StackTraceElement::create(method,
1978 gstc._bcis->at(i),
1979 CHECK_NULL);
1980 trace->obj_at_put(i, element);
1981 }
1982
1983 return trace();
1984 }
1985
1986 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1987 JavaThreadStatus status = get_thread_status(java_thread);
1988 switch (status) {
1989 case JavaThreadStatus::NEW : return "NEW";
1990 case JavaThreadStatus::RUNNABLE : return "RUNNABLE";
1991 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)";
1992 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1993 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1994 case JavaThreadStatus::PARKED : return "WAITING (parking)";
1995 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)";
1996 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1997 case JavaThreadStatus::TERMINATED : return "TERMINATED";
1998 default : return "UNKNOWN";
1999 };
2000 }
2001 int java_lang_ThreadGroup::_parent_offset;
2002 int java_lang_ThreadGroup::_name_offset;
2003 int java_lang_ThreadGroup::_maxPriority_offset;
2004 int java_lang_ThreadGroup::_daemon_offset;
2005
2006 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
2007 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2008 return java_thread_group->obj_field(_parent_offset);
2009 }
2010
2011 // ("name as oop" accessor is not necessary)
2012
2013 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
2014 oop name = java_thread_group->obj_field(_name_offset);
2015 // ThreadGroup.name can be null
2016 if (name != nullptr) {
2017 return java_lang_String::as_utf8_string(name);
2018 }
2019 return nullptr;
2020 }
2021
2022 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
2023 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2024 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
2025 }
2026
2027 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
2028 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2029 return java_thread_group->bool_field(_daemon_offset) != 0;
2030 }
2031
2032 #define THREADGROUP_FIELDS_DO(macro) \
2033 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
2034 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
2035 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
2036 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false);
2037
2038 void java_lang_ThreadGroup::compute_offsets() {
2039 assert(_parent_offset == 0, "offsets should be initialized only once");
2040
2041 InstanceKlass* k = vmClasses::ThreadGroup_klass();
2042 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2043 }
2044
2045 #if INCLUDE_CDS
2046 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
2047 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2048 }
2049 #endif
2050
2051
2052 // java_lang_VirtualThread
2053
2054 int java_lang_VirtualThread::static_vthread_scope_offset;
2055 int java_lang_VirtualThread::_carrierThread_offset;
2056 int java_lang_VirtualThread::_continuation_offset;
2057 int java_lang_VirtualThread::_state_offset;
2058 int java_lang_VirtualThread::_next_offset;
2059 int java_lang_VirtualThread::_onWaitingList_offset;
2060 int java_lang_VirtualThread::_notified_offset;
2061 int java_lang_VirtualThread::_timeout_offset;
2062 int java_lang_VirtualThread::_objectWaiter_offset;
2063
2064 #define VTHREAD_FIELDS_DO(macro) \
2065 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \
2066 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \
2067 macro(_continuation_offset, k, "cont", continuation_signature, false); \
2068 macro(_state_offset, k, "state", int_signature, false); \
2069 macro(_next_offset, k, "next", vthread_signature, false); \
2070 macro(_onWaitingList_offset, k, "onWaitingList", bool_signature, false); \
2071 macro(_notified_offset, k, "notified", bool_signature, false); \
2072 macro(_timeout_offset, k, "timeout", long_signature, false);
2073
2074
2075 void java_lang_VirtualThread::compute_offsets() {
2076 InstanceKlass* k = vmClasses::VirtualThread_klass();
2077 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2078 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2079 }
2080
2081 bool java_lang_VirtualThread::is_instance(oop obj) {
2082 return obj != nullptr && is_subclass(obj->klass());
2083 }
2084
2085 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
2086 oop thread = vthread->obj_field(_carrierThread_offset);
2087 return thread;
2088 }
2089
2090 oop java_lang_VirtualThread::continuation(oop vthread) {
2091 oop cont = vthread->obj_field(_continuation_offset);
2092 return cont;
2093 }
2094
2095 int java_lang_VirtualThread::state(oop vthread) {
2096 return vthread->int_field_acquire(_state_offset);
2097 }
2098
2099 void java_lang_VirtualThread::set_state(oop vthread, int state) {
2100 vthread->release_int_field_put(_state_offset, state);
2101 }
2102
2103 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) {
2104 jint* addr = vthread->field_addr<jint>(_state_offset);
2105 int res = Atomic::cmpxchg(addr, old_state, new_state);
2106 return res;
2107 }
2108
2109 oop java_lang_VirtualThread::next(oop vthread) {
2110 return vthread->obj_field(_next_offset);
2111 }
2112
2113 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) {
2114 vthread->obj_field_put(_next_offset, next_vthread);
2115 }
2116
2117 // Add vthread to the waiting list if it's not already in it. Multiple threads
2118 // could be trying to add vthread to the list at the same time, so we control
2119 // access with a cmpxchg on onWaitingList. The winner adds vthread to the list.
2120 // Method returns true if we added vthread to the list, false otherwise.
2121 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) {
2122 jboolean* addr = vthread->field_addr<jboolean>(_onWaitingList_offset);
2123 jboolean vthread_on_list = Atomic::load(addr);
2124 if (!vthread_on_list) {
2125 vthread_on_list = Atomic::cmpxchg(addr, (jboolean)JNI_FALSE, (jboolean)JNI_TRUE);
2126 if (!vthread_on_list) {
2127 for (;;) {
2128 oop head = list_head.resolve();
2129 java_lang_VirtualThread::set_next(vthread, head);
2130 if (list_head.cmpxchg(head, vthread) == head) return true;
2131 }
2132 }
2133 }
2134 return false; // already on waiting list
2135 }
2136
2137 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) {
2138 vthread->bool_field_put_volatile(_notified_offset, value);
2139 }
2140
2141 jlong java_lang_VirtualThread::timeout(oop vthread) {
2142 return vthread->long_field(_timeout_offset);
2143 }
2144
2145 void java_lang_VirtualThread::set_timeout(oop vthread, jlong value) {
2146 vthread->long_field_put(_timeout_offset, value);
2147 }
2148
2149 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2150 JavaThreadStatus status = JavaThreadStatus::NEW;
2151 switch (state & ~SUSPENDED) {
2152 case NEW:
2153 status = JavaThreadStatus::NEW;
2154 break;
2155 case STARTED:
2156 case RUNNING:
2157 case PARKING:
2158 case TIMED_PARKING:
2159 case UNPARKED:
2160 case YIELDING:
2161 case YIELDED:
2162 case UNBLOCKED:
2163 case WAITING:
2164 case TIMED_WAITING:
2165 status = JavaThreadStatus::RUNNABLE;
2166 break;
2167 case PARKED:
2168 case PINNED:
2169 status = JavaThreadStatus::PARKED;
2170 break;
2171 case TIMED_PARKED:
2172 case TIMED_PINNED:
2173 status = JavaThreadStatus::PARKED_TIMED;
2174 break;
2175 case BLOCKING:
2176 case BLOCKED:
2177 status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER;
2178 break;
2179 case WAIT:
2180 status = JavaThreadStatus::IN_OBJECT_WAIT;
2181 break;
2182 case TIMED_WAIT:
2183 status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED;
2184 break;
2185 case TERMINATED:
2186 status = JavaThreadStatus::TERMINATED;
2187 break;
2188 default:
2189 ShouldNotReachHere();
2190 }
2191 return status;
2192 }
2193
2194 ObjectMonitor* java_lang_VirtualThread::current_pending_monitor(oop vthread) {
2195 ObjectWaiter* waiter = objectWaiter(vthread);
2196 if (waiter != nullptr && waiter->at_monitorenter()) {
2197 return waiter->monitor();
2198 }
2199 return nullptr;
2200 }
2201
2202 ObjectMonitor* java_lang_VirtualThread::current_waiting_monitor(oop vthread) {
2203 ObjectWaiter* waiter = objectWaiter(vthread);
2204 if (waiter != nullptr && waiter->is_wait()) {
2205 return waiter->monitor();
2206 }
2207 return nullptr;
2208 }
2209
2210 bool java_lang_VirtualThread::is_preempted(oop vthread) {
2211 oop continuation = java_lang_VirtualThread::continuation(vthread);
2212 assert(continuation != nullptr, "vthread with no continuation");
2213 stackChunkOop chunk = jdk_internal_vm_Continuation::tail(continuation);
2214 return chunk != nullptr && chunk->preempted();
2215 }
2216
2217 #if INCLUDE_CDS
2218 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2219 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2220 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2221 }
2222 #endif
2223
2224 // java_lang_Throwable
2225
2226 int java_lang_Throwable::_backtrace_offset;
2227 int java_lang_Throwable::_detailMessage_offset;
2228 int java_lang_Throwable::_stackTrace_offset;
2229 int java_lang_Throwable::_depth_offset;
2230 int java_lang_Throwable::_cause_offset;
2231 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2232
2233 #define THROWABLE_FIELDS_DO(macro) \
2234 macro(_backtrace_offset, k, "backtrace", object_signature, false); \
2235 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \
2236 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2237 macro(_depth_offset, k, "depth", int_signature, false); \
2238 macro(_cause_offset, k, "cause", throwable_signature, false); \
2239 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2240
2241 void java_lang_Throwable::compute_offsets() {
2242 InstanceKlass* k = vmClasses::Throwable_klass();
2243 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2244 }
2245
2246 #if INCLUDE_CDS
2247 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2248 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2249 }
2250 #endif
2251
2252 oop java_lang_Throwable::unassigned_stacktrace() {
2253 InstanceKlass* ik = vmClasses::Throwable_klass();
2254 oop base = ik->static_field_base_raw();
2255 return base->obj_field(_static_unassigned_stacktrace_offset);
2256 }
2257
2258 oop java_lang_Throwable::backtrace(oop throwable) {
2259 return throwable->obj_field_acquire(_backtrace_offset);
2260 }
2261
2262
2263 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2264 throwable->release_obj_field_put(_backtrace_offset, value);
2265 }
2266
2267 int java_lang_Throwable::depth(oop throwable) {
2268 return throwable->int_field(_depth_offset);
2269 }
2270
2271 void java_lang_Throwable::set_depth(oop throwable, int value) {
2272 throwable->int_field_put(_depth_offset, value);
2273 }
2274
2275 oop java_lang_Throwable::message(oop throwable) {
2276 return throwable->obj_field(_detailMessage_offset);
2277 }
2278
2279 const char* java_lang_Throwable::message_as_utf8(oop throwable) {
2280 oop msg = java_lang_Throwable::message(throwable);
2281 const char* msg_utf8 = nullptr;
2282 if (msg != nullptr) {
2283 msg_utf8 = java_lang_String::as_utf8_string(msg);
2284 }
2285 return msg_utf8;
2286 }
2287
2288 oop java_lang_Throwable::cause(oop throwable) {
2289 return throwable->obj_field(_cause_offset);
2290 }
2291
2292 void java_lang_Throwable::set_message(oop throwable, oop value) {
2293 throwable->obj_field_put(_detailMessage_offset, value);
2294 }
2295
2296
2297 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2298 throwable->obj_field_put(_stackTrace_offset, st_element_array);
2299 }
2300
2301 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2302 set_stacktrace(throwable, nullptr);
2303 }
2304
2305 oop java_lang_Throwable::create_exception_instance(Symbol* class_name, TRAPS) {
2306 Klass* k = SystemDictionary::resolve_or_fail(class_name, true, CHECK_NULL);
2307 return InstanceKlass::cast(k)->allocate_instance(CHECK_NULL);
2308 }
2309
2310 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2311 ResourceMark rm;
2312 Klass* k = throwable->klass();
2313 assert(k != nullptr, "just checking");
2314 st->print("%s", k->external_name());
2315 oop msg = message(throwable);
2316 if (msg != nullptr) {
2317 st->print(": %s", java_lang_String::as_utf8_string(msg));
2318 }
2319 }
2320
2321 // After this many redefines, the stack trace is unreliable.
2322 const int MAX_VERSION = USHRT_MAX;
2323
2324 static inline bool version_matches(Method* method, int version) {
2325 assert(version < MAX_VERSION, "version is too big");
2326 return method != nullptr && (method->constants()->version() == version);
2327 }
2328
2329 // This class provides a simple wrapper over the internal structure of
2330 // exception backtrace to insulate users of the backtrace from needing
2331 // to know what it looks like.
2332 // The code of this class is not GC safe. Allocations can only happen
2333 // in expand().
2334 class BacktraceBuilder: public StackObj {
2335 friend class BacktraceIterator;
2336 private:
2337 Handle _backtrace;
2338 objArrayOop _head;
2339 typeArrayOop _methods;
2340 typeArrayOop _bcis;
2341 objArrayOop _mirrors;
2342 typeArrayOop _names; // Needed to insulate method name against redefinition.
2343 // True if the top frame of the backtrace is omitted because it shall be hidden.
2344 bool _has_hidden_top_frame;
2345 int _index;
2346 NoSafepointVerifier _nsv;
2347
2348 enum {
2349 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2350 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2351 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2352 trace_names_offset = java_lang_Throwable::trace_names_offset,
2353 trace_conts_offset = java_lang_Throwable::trace_conts_offset,
2354 trace_next_offset = java_lang_Throwable::trace_next_offset,
2355 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2356 trace_size = java_lang_Throwable::trace_size,
2357 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2358 };
2359
2360 // get info out of chunks
2361 static typeArrayOop get_methods(objArrayHandle chunk) {
2362 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2363 assert(methods != nullptr, "method array should be initialized in backtrace");
2364 return methods;
2365 }
2366 static typeArrayOop get_bcis(objArrayHandle chunk) {
2367 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2368 assert(bcis != nullptr, "bci array should be initialized in backtrace");
2369 return bcis;
2370 }
2371 static objArrayOop get_mirrors(objArrayHandle chunk) {
2372 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2373 assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2374 return mirrors;
2375 }
2376 static typeArrayOop get_names(objArrayHandle chunk) {
2377 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2378 assert(names != nullptr, "names array should be initialized in backtrace");
2379 return names;
2380 }
2381 static bool has_hidden_top_frame(objArrayHandle chunk) {
2382 oop hidden = chunk->obj_at(trace_hidden_offset);
2383 return hidden != nullptr;
2384 }
2385
2386 public:
2387
2388 // constructor for new backtrace
2389 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2390 expand(CHECK);
2391 _backtrace = Handle(THREAD, _head);
2392 _index = 0;
2393 }
2394
2395 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2396 _methods = get_methods(backtrace);
2397 _bcis = get_bcis(backtrace);
2398 _mirrors = get_mirrors(backtrace);
2399 _names = get_names(backtrace);
2400 _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2401 assert(_methods->length() == _bcis->length() &&
2402 _methods->length() == _mirrors->length() &&
2403 _mirrors->length() == _names->length(),
2404 "method and source information arrays should match");
2405
2406 // head is the preallocated backtrace
2407 _head = backtrace();
2408 _backtrace = Handle(thread, _head);
2409 _index = 0;
2410 }
2411
2412 void expand(TRAPS) {
2413 objArrayHandle old_head(THREAD, _head);
2414 PauseNoSafepointVerifier pnsv(&_nsv);
2415
2416 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2417 objArrayHandle new_head(THREAD, head);
2418
2419 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2420 typeArrayHandle new_methods(THREAD, methods);
2421
2422 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2423 typeArrayHandle new_bcis(THREAD, bcis);
2424
2425 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2426 objArrayHandle new_mirrors(THREAD, mirrors);
2427
2428 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2429 typeArrayHandle new_names(THREAD, names);
2430
2431 if (!old_head.is_null()) {
2432 old_head->obj_at_put(trace_next_offset, new_head());
2433 }
2434 new_head->obj_at_put(trace_methods_offset, new_methods());
2435 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2436 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2437 new_head->obj_at_put(trace_names_offset, new_names());
2438 new_head->obj_at_put(trace_hidden_offset, nullptr);
2439
2440 _head = new_head();
2441 _methods = new_methods();
2442 _bcis = new_bcis();
2443 _mirrors = new_mirrors();
2444 _names = new_names();
2445 _index = 0;
2446 }
2447
2448 oop backtrace() {
2449 return _backtrace();
2450 }
2451
2452 inline void push(Method* method, int bci, TRAPS) {
2453 // Smear the -1 bci to 0 since the array only holds unsigned
2454 // shorts. The later line number lookup would just smear the -1
2455 // to a 0 even if it could be recorded.
2456 if (bci == SynchronizationEntryBCI) bci = 0;
2457
2458 if (_index >= trace_chunk_size) {
2459 methodHandle mhandle(THREAD, method);
2460 expand(CHECK);
2461 method = mhandle();
2462 }
2463
2464 _methods->ushort_at_put(_index, method->orig_method_idnum());
2465 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2466
2467 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2468 // klass owning the symbols alive so their refcounts aren't decremented.
2469 Symbol* name = method->name();
2470 _names->symbol_at_put(_index, name);
2471
2472 // We need to save the mirrors in the backtrace to keep the class
2473 // from being unloaded while we still have this stack trace.
2474 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2475 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2476
2477 _index++;
2478 }
2479
2480 void set_has_hidden_top_frame() {
2481 if (!_has_hidden_top_frame) {
2482 // It would be nice to add java/lang/Boolean::TRUE here
2483 // to indicate that this backtrace has a hidden top frame.
2484 // But this code is used before TRUE is allocated.
2485 // Therefore let's just use an arbitrary legal oop
2486 // available right here. _methods is a short[].
2487 assert(_methods != nullptr, "we need a legal oop");
2488 _has_hidden_top_frame = true;
2489 _head->obj_at_put(trace_hidden_offset, _methods);
2490 }
2491 }
2492 };
2493
2494 struct BacktraceElement : public StackObj {
2495 int _method_id;
2496 int _bci;
2497 int _version;
2498 Symbol* _name;
2499 Handle _mirror;
2500 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2501 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2502 };
2503
2504 class BacktraceIterator : public StackObj {
2505 int _index;
2506 objArrayHandle _result;
2507 objArrayHandle _mirrors;
2508 typeArrayHandle _methods;
2509 typeArrayHandle _bcis;
2510 typeArrayHandle _names;
2511
2512 void init(objArrayHandle result, Thread* thread) {
2513 // Get method id, bci, version and mirror from chunk
2514 _result = result;
2515 if (_result.not_null()) {
2516 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2517 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2518 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2519 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2520 _index = 0;
2521 }
2522 }
2523 public:
2524 BacktraceIterator(objArrayHandle result, Thread* thread) {
2525 init(result, thread);
2526 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2527 }
2528
2529 BacktraceElement next(Thread* thread) {
2530 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2531 _methods->ushort_at(_index),
2532 Backtrace::version_at(_bcis->int_at(_index)),
2533 Backtrace::bci_at(_bcis->int_at(_index)),
2534 _names->symbol_at(_index));
2535 _index++;
2536
2537 if (_index >= java_lang_Throwable::trace_chunk_size) {
2538 int next_offset = java_lang_Throwable::trace_next_offset;
2539 // Get next chunk
2540 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2541 init(result, thread);
2542 }
2543 return e;
2544 }
2545
2546 bool repeat() {
2547 return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2548 }
2549 };
2550
2551
2552 // Print stack trace element to resource allocated buffer
2553 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2554 int version, int bci, Symbol* name) {
2555 ResourceMark rm;
2556
2557 // Get strings and string lengths
2558 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2559 const char* klass_name = holder->external_name();
2560 int buf_len = (int)strlen(klass_name);
2561
2562 char* method_name = name->as_C_string();
2563 buf_len += (int)strlen(method_name);
2564
2565 char* source_file_name = nullptr;
2566 Symbol* source = Backtrace::get_source_file_name(holder, version);
2567 if (source != nullptr) {
2568 source_file_name = source->as_C_string();
2569 buf_len += (int)strlen(source_file_name);
2570 }
2571
2572 char *module_name = nullptr, *module_version = nullptr;
2573 ModuleEntry* module = holder->module();
2574 if (module->is_named()) {
2575 module_name = module->name()->as_C_string();
2576 buf_len += (int)strlen(module_name);
2577 if (module->version() != nullptr) {
2578 module_version = module->version()->as_C_string();
2579 buf_len += (int)strlen(module_version);
2580 }
2581 }
2582
2583 // Allocate temporary buffer with extra space for formatting and line number
2584 const size_t buf_size = buf_len + 64;
2585 char* buf = NEW_RESOURCE_ARRAY(char, buf_size);
2586
2587 // Print stack trace line in buffer
2588 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name);
2589
2590 // Print module information
2591 if (module_name != nullptr) {
2592 if (module_version != nullptr) {
2593 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version);
2594 } else {
2595 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name);
2596 }
2597 }
2598
2599 // The method can be null if the requested class version is gone
2600 Method* method = holder->method_with_orig_idnum(method_id, version);
2601 if (!version_matches(method, version)) {
2602 strcat(buf, "Redefined)");
2603 } else {
2604 int line_number = Backtrace::get_line_number(method, bci);
2605 if (line_number == -2) {
2606 strcat(buf, "Native Method)");
2607 } else {
2608 if (source_file_name != nullptr && (line_number != -1)) {
2609 // Sourcename and linenumber
2610 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number);
2611 } else if (source_file_name != nullptr) {
2612 // Just sourcename
2613 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name);
2614 } else {
2615 // Neither sourcename nor linenumber
2616 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)");
2617 }
2618 nmethod* nm = method->code();
2619 if (WizardMode && nm != nullptr) {
2620 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2621 }
2622 }
2623 }
2624
2625 st->print_cr("%s", buf);
2626 }
2627
2628 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2629 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2630 int method_id = method->orig_method_idnum();
2631 int version = method->constants()->version();
2632 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2633 }
2634
2635 /**
2636 * Print the throwable message and its stack trace plus all causes by walking the
2637 * cause chain. The output looks the same as of Throwable.printStackTrace().
2638 */
2639 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2640 // First, print the message.
2641 print(throwable(), st);
2642 st->cr();
2643
2644 // Now print the stack trace.
2645 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2646 while (throwable.not_null()) {
2647 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2648 if (result.is_null()) {
2649 st->print_raw_cr("\t<<no stack trace available>>");
2650 return;
2651 }
2652 BacktraceIterator iter(result, THREAD);
2653
2654 while (iter.repeat()) {
2655 BacktraceElement bte = iter.next(THREAD);
2656 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2657 }
2658 if (THREAD->can_call_java()) {
2659 // Call getCause() which doesn't necessarily return the _cause field.
2660 ExceptionMark em(THREAD);
2661 JavaValue cause(T_OBJECT);
2662 JavaCalls::call_virtual(&cause,
2663 throwable,
2664 throwable->klass(),
2665 vmSymbols::getCause_name(),
2666 vmSymbols::void_throwable_signature(),
2667 THREAD);
2668 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2669 if (HAS_PENDING_EXCEPTION) {
2670 CLEAR_PENDING_EXCEPTION;
2671 throwable = Handle();
2672 } else {
2673 throwable = Handle(THREAD, cause.get_oop());
2674 if (throwable.not_null()) {
2675 st->print("Caused by: ");
2676 print(throwable(), st);
2677 st->cr();
2678 }
2679 }
2680 } else {
2681 st->print_raw_cr("<<cannot call Java to get cause>>");
2682 return;
2683 }
2684 }
2685 }
2686
2687 /**
2688 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2689 */
2690 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2691 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2692 JavaValue result(T_VOID);
2693 JavaCalls::call_virtual(&result,
2694 throwable,
2695 vmClasses::Throwable_klass(),
2696 vmSymbols::printStackTrace_name(),
2697 vmSymbols::void_method_signature(),
2698 THREAD);
2699 }
2700
2701 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2702 if (!StackTraceInThrowable) return;
2703 ResourceMark rm(THREAD);
2704
2705 // Start out by clearing the backtrace for this object, in case the VM
2706 // runs out of memory while allocating the stack trace
2707 set_backtrace(throwable(), nullptr);
2708 // Clear lazily constructed Java level stacktrace if refilling occurs
2709 // This is unnecessary in 1.7+ but harmless
2710 clear_stacktrace(throwable());
2711
2712 int max_depth = MaxJavaStackTraceDepth;
2713 JavaThread* thread = THREAD;
2714
2715 BacktraceBuilder bt(CHECK);
2716
2717 // If there is no Java frame just return the method that was being called
2718 // with bci 0
2719 if (!thread->has_last_Java_frame()) {
2720 if (max_depth >= 1 && method() != nullptr) {
2721 bt.push(method(), 0, CHECK);
2722 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2723 set_depth(throwable(), 1);
2724 set_backtrace(throwable(), bt.backtrace());
2725 }
2726 return;
2727 }
2728
2729 // Instead of using vframe directly, this version of fill_in_stack_trace
2730 // basically handles everything by hand. This significantly improved the
2731 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2732 // See bug 6333838 for more details.
2733 // The "ASSERT" here is to verify this method generates the exactly same stack
2734 // trace as utilizing vframe.
2735 #ifdef ASSERT
2736 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2737 #endif
2738 int total_count = 0;
2739 RegisterMap map(thread,
2740 RegisterMap::UpdateMap::skip,
2741 RegisterMap::ProcessFrames::skip,
2742 RegisterMap::WalkContinuation::include);
2743 int decode_offset = 0;
2744 nmethod* nm = nullptr;
2745 bool skip_fillInStackTrace_check = false;
2746 bool skip_throwableInit_check = false;
2747 bool skip_hidden = !ShowHiddenFrames;
2748 bool show_carrier = ShowCarrierFrames;
2749 ContinuationEntry* cont_entry = thread->last_continuation();
2750 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2751 Method* method = nullptr;
2752 int bci = 0;
2753
2754 // Compiled java method case.
2755 if (decode_offset != 0) {
2756 DebugInfoReadStream stream(nm, decode_offset);
2757 decode_offset = stream.read_int();
2758 method = (Method*)nm->metadata_at(stream.read_int());
2759 bci = stream.read_bci();
2760 } else {
2761 if (fr.is_first_frame()) break;
2762
2763 if (Continuation::is_continuation_enterSpecial(fr)) {
2764 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2765 if (!show_carrier && cont_entry->is_virtual_thread()) {
2766 break;
2767 }
2768 cont_entry = cont_entry->parent();
2769 }
2770
2771 address pc = fr.pc();
2772 if (fr.is_interpreted_frame()) {
2773 address bcp;
2774 if (!map.in_cont()) {
2775 bcp = fr.interpreter_frame_bcp();
2776 method = fr.interpreter_frame_method();
2777 } else {
2778 bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2779 method = map.stack_chunk()->interpreter_frame_method(fr);
2780 }
2781 bci = method->bci_from(bcp);
2782 fr = fr.sender(&map);
2783 } else {
2784 CodeBlob* cb = fr.cb();
2785 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2786 // but non nmethod
2787 fr = fr.sender(&map);
2788 if (cb == nullptr || !cb->is_nmethod()) {
2789 continue;
2790 }
2791 nm = cb->as_nmethod();
2792 assert(nm->method() != nullptr, "must be");
2793 if (nm->method()->is_native()) {
2794 method = nm->method();
2795 bci = 0;
2796 } else {
2797 PcDesc* pd = nm->pc_desc_at(pc);
2798 decode_offset = pd->scope_decode_offset();
2799 // if decode_offset is not equal to 0, it will execute the
2800 // "compiled java method case" at the beginning of the loop.
2801 continue;
2802 }
2803 }
2804 }
2805 #ifdef ASSERT
2806 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2807 assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2808 st.next();
2809 }
2810 #endif
2811
2812 // the format of the stacktrace will be:
2813 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2814 // - 0 or more <init> methods for the exception class (skipped)
2815 // - rest of the stack
2816
2817 if (!skip_fillInStackTrace_check) {
2818 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2819 throwable->is_a(method->method_holder())) {
2820 continue;
2821 }
2822 else {
2823 skip_fillInStackTrace_check = true; // gone past them all
2824 }
2825 }
2826 if (!skip_throwableInit_check) {
2827 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2828
2829 // skip <init> methods of the exception class and superclasses
2830 // This is similar to classic VM.
2831 if (method->name() == vmSymbols::object_initializer_name() &&
2832 throwable->is_a(method->method_holder())) {
2833 continue;
2834 } else {
2835 // there are none or we've seen them all - either way stop checking
2836 skip_throwableInit_check = true;
2837 }
2838 }
2839 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2840 if (skip_hidden) {
2841 if (total_count == 0) {
2842 // The top frame will be hidden from the stack trace.
2843 bt.set_has_hidden_top_frame();
2844 }
2845 continue;
2846 }
2847 }
2848
2849 bt.push(method, bci, CHECK);
2850 total_count++;
2851 }
2852
2853 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2854
2855 // Put completed stack trace into throwable object
2856 set_backtrace(throwable(), bt.backtrace());
2857 set_depth(throwable(), total_count);
2858 }
2859
2860 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2861 // No-op if stack trace is disabled
2862 if (!StackTraceInThrowable) {
2863 return;
2864 }
2865
2866 // Disable stack traces for some preallocated out of memory errors
2867 if (!Universe::should_fill_in_stack_trace(throwable)) {
2868 return;
2869 }
2870
2871 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2872 PreserveExceptionMark pm(THREAD);
2873
2874 fill_in_stack_trace(throwable, method, THREAD);
2875 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2876 // original exception via the PreserveExceptionMark destructor.
2877 CLEAR_PENDING_EXCEPTION;
2878 }
2879
2880 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2881 // Allocate stack trace - backtrace is created but not filled in
2882
2883 // No-op if stack trace is disabled
2884 if (!StackTraceInThrowable) return;
2885 BacktraceBuilder bt(CHECK); // creates a backtrace
2886 set_backtrace(throwable(), bt.backtrace());
2887 }
2888
2889
2890 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2891 // Fill in stack trace into preallocated backtrace (no GC)
2892
2893 // No-op if stack trace is disabled
2894 if (!StackTraceInThrowable) return;
2895
2896 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2897
2898 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2899
2900 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2901 assert(backtrace.not_null(), "backtrace should have been preallocated");
2902
2903 ResourceMark rm(THREAD);
2904 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2905
2906 BacktraceBuilder bt(THREAD, backtrace);
2907
2908 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2909 // methods as preallocated errors aren't created by "java" code.
2910
2911 // fill in as much stack trace as possible
2912 int chunk_count = 0;
2913 for (;!st.at_end(); st.next()) {
2914 bt.push(st.method(), st.bci(), CHECK);
2915 chunk_count++;
2916
2917 // Bail-out for deep stacks
2918 if (chunk_count >= trace_chunk_size) break;
2919 }
2920 set_depth(throwable(), chunk_count);
2921 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2922
2923 // We support the Throwable immutability protocol defined for Java 7.
2924 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2925 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2926 }
2927
2928 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2929 objArrayHandle stack_trace_array_h, TRAPS) {
2930
2931 if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2932 THROW(vmSymbols::java_lang_NullPointerException());
2933 }
2934
2935 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2936
2937 if (stack_trace_array_h->length() != depth) {
2938 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2939 }
2940
2941 objArrayHandle result(THREAD, objArrayOop(backtrace()));
2942 BacktraceIterator iter(result, THREAD);
2943
2944 int index = 0;
2945 while (iter.repeat()) {
2946 BacktraceElement bte = iter.next(THREAD);
2947
2948 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2949
2950 if (stack_trace_element.is_null()) {
2951 THROW(vmSymbols::java_lang_NullPointerException());
2952 }
2953
2954 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2955 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2956
2957 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2958 method,
2959 bte._version,
2960 bte._bci,
2961 bte._name,
2962 CHECK);
2963 }
2964 }
2965
2966 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
2967 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
2968 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
2969 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
2970 // symbolic stacktrace of 'throwable'.
2971 assert(throwable.not_null(), "shouldn't be");
2972
2973 // Now create the message from the original exception and thread name.
2974 ResourceMark rm(current);
2975 const char *message = nullptr;
2976 oop detailed_message = java_lang_Throwable::message(throwable());
2977 if (detailed_message != nullptr) {
2978 message = java_lang_String::as_utf8_string(detailed_message);
2979 }
2980 stringStream st;
2981 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
2982 message == nullptr ? "" : ":");
2983 if (message == nullptr) {
2984 st.print("[in thread \"%s\"]", current->name());
2985 } else {
2986 st.print("%s [in thread \"%s\"]", message, current->name());
2987 }
2988
2989 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
2990 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
2991 // If new_exception returns a different exception while creating the exception,
2992 // abandon the attempt to save the initialization error and return null.
2993 if (init_error->klass()->name() != exception_name) {
2994 log_info(class, init)("Exception %s thrown while saving initialization exception",
2995 init_error->klass()->external_name());
2996 return Handle();
2997 }
2998
2999 // Call to java to fill in the stack trace and clear declaringClassObject to
3000 // not keep classes alive in the stack trace.
3001 // call this: public StackTraceElement[] getStackTrace()
3002 JavaValue result(T_ARRAY);
3003 JavaCalls::call_virtual(&result, throwable,
3004 vmClasses::Throwable_klass(),
3005 vmSymbols::getStackTrace_name(),
3006 vmSymbols::getStackTrace_signature(),
3007 current);
3008 if (!current->has_pending_exception()){
3009 Handle stack_trace(current, result.get_oop());
3010 assert(stack_trace->is_objArray(), "Should be an array");
3011 java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
3012 // Clear backtrace because the stacktrace should be used instead.
3013 set_backtrace(init_error(), nullptr);
3014 } else {
3015 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
3016 init_error->klass()->external_name());
3017 current->clear_pending_exception();
3018 }
3019
3020 return init_error;
3021 }
3022
3023 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
3024 JavaThread* current = JavaThread::current();
3025 objArrayHandle result(current, objArrayOop(backtrace(throwable)));
3026 BacktraceIterator iter(result, current);
3027 // No backtrace available.
3028 if (!iter.repeat()) return false;
3029
3030 // If the exception happened in a frame that has been hidden, i.e.,
3031 // omitted from the back trace, we can not compute the message.
3032 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
3033 if (hidden != nullptr) {
3034 return false;
3035 }
3036
3037 // Get first backtrace element.
3038 BacktraceElement bte = iter.next(current);
3039
3040 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
3041 assert(holder != nullptr, "first element should be non-null");
3042 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
3043
3044 // Original version is no longer available.
3045 if (m == nullptr || !version_matches(m, bte._version)) {
3046 return false;
3047 }
3048
3049 *method = m;
3050 *bci = bte._bci;
3051 return true;
3052 }
3053
3054 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
3055 // Allocate java.lang.StackTraceElement instance
3056 InstanceKlass* k = vmClasses::StackTraceElement_klass();
3057 assert(k != nullptr, "must be loaded in 1.4+");
3058 if (k->should_be_initialized()) {
3059 k->initialize(CHECK_NULL);
3060 }
3061
3062 Handle element = k->allocate_instance_handle(CHECK_NULL);
3063
3064 int version = method->constants()->version();
3065 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
3066 return element();
3067 }
3068
3069 void java_lang_StackTraceElement::fill_in(Handle element,
3070 InstanceKlass* holder, const methodHandle& method,
3071 int version, int bci, Symbol* name, TRAPS) {
3072 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
3073
3074 ResourceMark rm(THREAD);
3075 HandleMark hm(THREAD);
3076
3077 // Fill in class name
3078 Handle java_class(THREAD, holder->java_mirror());
3079 oop classname = java_lang_Class::name(java_class, CHECK);
3080 java_lang_StackTraceElement::set_declaringClass(element(), classname);
3081 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
3082
3083 oop loader = holder->class_loader();
3084 if (loader != nullptr) {
3085 oop loader_name = java_lang_ClassLoader::name(loader);
3086 if (loader_name != nullptr)
3087 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
3088 }
3089
3090 // Fill in method name
3091 oop methodname = StringTable::intern(name, CHECK);
3092 java_lang_StackTraceElement::set_methodName(element(), methodname);
3093
3094 // Fill in module name and version
3095 ModuleEntry* module = holder->module();
3096 if (module->is_named()) {
3097 oop module_name = StringTable::intern(module->name(), CHECK);
3098 java_lang_StackTraceElement::set_moduleName(element(), module_name);
3099 oop module_version;
3100 if (module->version() != nullptr) {
3101 module_version = StringTable::intern(module->version(), CHECK);
3102 } else {
3103 module_version = nullptr;
3104 }
3105 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
3106 }
3107
3108 if (method() == nullptr || !version_matches(method(), version)) {
3109 // The method was redefined, accurate line number information isn't available
3110 java_lang_StackTraceElement::set_fileName(element(), nullptr);
3111 java_lang_StackTraceElement::set_lineNumber(element(), -1);
3112 } else {
3113 Symbol* source;
3114 oop source_file;
3115 int line_number;
3116 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
3117
3118 java_lang_StackTraceElement::set_fileName(element(), source_file);
3119 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
3120 }
3121 }
3122
3123 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
3124 InstanceKlass* holder,
3125 int version,
3126 const methodHandle& method,
3127 int bci,
3128 Symbol*& source,
3129 oop& source_file,
3130 int& line_number, TRAPS) {
3131 // Fill in source file name and line number.
3132 source = Backtrace::get_source_file_name(holder, version);
3133 source_file = java_lang_Class::source_file(java_class());
3134 if (source != nullptr) {
3135 // Class was not redefined. We can trust its cache if set,
3136 // else we have to initialize it.
3137 if (source_file == nullptr) {
3138 source_file = StringTable::intern(source, CHECK);
3139 java_lang_Class::set_source_file(java_class(), source_file);
3140 }
3141 } else {
3142 // Class was redefined. Dump the cache if it was set.
3143 if (source_file != nullptr) {
3144 source_file = nullptr;
3145 java_lang_Class::set_source_file(java_class(), source_file);
3146 }
3147 }
3148 line_number = Backtrace::get_line_number(method(), bci);
3149 }
3150
3151 #if INCLUDE_JVMCI
3152 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
3153 Symbol*& filename, int& line_number, TRAPS) {
3154 ResourceMark rm(THREAD);
3155 HandleMark hm(THREAD);
3156
3157 filename = nullptr;
3158 line_number = -1;
3159
3160 oop source_file;
3161 int version = method->constants()->version();
3162 InstanceKlass* holder = method->method_holder();
3163 Handle java_class(THREAD, holder->java_mirror());
3164 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
3165 }
3166 #endif // INCLUDE_JVMCI
3167
3168 // java_lang_ClassFrameInfo
3169
3170 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
3171 int java_lang_ClassFrameInfo::_flags_offset;
3172
3173 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
3174 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \
3175 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false)
3176
3177 void java_lang_ClassFrameInfo::compute_offsets() {
3178 InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
3179 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3180 }
3181
3182 #if INCLUDE_CDS
3183 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
3184 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3185 }
3186 #endif
3187
3188 static int get_flags(const methodHandle& m) {
3189 int flags = m->access_flags().as_method_flags();
3190 if (m->is_object_initializer()) {
3191 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR;
3192 } else {
3193 // Note: Static initializers can be here. Record them as plain methods.
3194 flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
3195 }
3196 if (m->caller_sensitive()) {
3197 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
3198 }
3199 if (m->is_hidden()) {
3200 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3201 }
3202 assert((flags & 0xFF000000) == 0, "unexpected flags");
3203 return flags;
3204 }
3205
3206 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3207 return obj->obj_field(_classOrMemberName_offset);
3208 }
3209
3210 int java_lang_ClassFrameInfo::flags(oop obj) {
3211 return obj->int_field(_flags_offset);
3212 }
3213
3214 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3215 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3216 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3217 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3218 stackFrame->int_field_put(_flags_offset, flags);
3219 }
3220
3221 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3222 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3223 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3224 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3225 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3226 stackFrame->int_field_put(_flags_offset, flags);
3227 }
3228
3229
3230 // java_lang_StackFrameInfo
3231
3232 int java_lang_StackFrameInfo::_type_offset;
3233 int java_lang_StackFrameInfo::_name_offset;
3234 int java_lang_StackFrameInfo::_bci_offset;
3235 int java_lang_StackFrameInfo::_version_offset;
3236 int java_lang_StackFrameInfo::_contScope_offset;
3237
3238 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3239 macro(_type_offset, k, "type", object_signature, false); \
3240 macro(_name_offset, k, "name", string_signature, false); \
3241 macro(_bci_offset, k, "bci", int_signature, false); \
3242 macro(_contScope_offset, k, "contScope", continuationscope_signature, false)
3243
3244 void java_lang_StackFrameInfo::compute_offsets() {
3245 InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3246 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3247 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3248 }
3249
3250 #if INCLUDE_CDS
3251 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3252 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3253 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3254 }
3255 #endif
3256
3257 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3258 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3259 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3260 return method;
3261 }
3262
3263 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3264 // set Method* or mid/cpref
3265 HandleMark hm(THREAD);
3266 Handle cont_h(THREAD, cont);
3267 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3268
3269 // set bci
3270 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3271 // method may be redefined; store the version
3272 int version = method->constants()->version();
3273 assert((jushort)version == version, "version should be short");
3274 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3275
3276 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3277 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3278 }
3279
3280 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3281 ResourceMark rm(THREAD);
3282 HandleMark hm(THREAD);
3283
3284 Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3285 InstanceKlass* holder = method->method_holder();
3286 short version = stackFrame->short_field(_version_offset);
3287 int bci = stackFrame->int_field(_bci_offset);
3288 Symbol* name = method->name();
3289 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3290 }
3291
3292 oop java_lang_StackFrameInfo::type(oop obj) {
3293 return obj->obj_field(_type_offset);
3294 }
3295
3296 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3297 obj->obj_field_put(_type_offset, value);
3298 }
3299
3300 oop java_lang_StackFrameInfo::name(oop obj) {
3301 return obj->obj_field(_name_offset);
3302 }
3303
3304 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3305 obj->obj_field_put(_name_offset, value);
3306 }
3307
3308 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3309 obj->short_field_put(_version_offset, value);
3310 }
3311
3312 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3313 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3314 obj->int_field_put(_bci_offset, value);
3315 }
3316
3317 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3318 obj->obj_field_put(_contScope_offset, value);
3319 }
3320
3321 int java_lang_LiveStackFrameInfo::_monitors_offset;
3322 int java_lang_LiveStackFrameInfo::_locals_offset;
3323 int java_lang_LiveStackFrameInfo::_operands_offset;
3324 int java_lang_LiveStackFrameInfo::_mode_offset;
3325
3326 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3327 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
3328 macro(_locals_offset, k, "locals", object_array_signature, false); \
3329 macro(_operands_offset, k, "operands", object_array_signature, false); \
3330 macro(_mode_offset, k, "mode", int_signature, false)
3331
3332 void java_lang_LiveStackFrameInfo::compute_offsets() {
3333 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3334 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3335 }
3336
3337 #if INCLUDE_CDS
3338 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3339 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3340 }
3341 #endif
3342
3343 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3344 obj->obj_field_put(_monitors_offset, value);
3345 }
3346
3347 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3348 obj->obj_field_put(_locals_offset, value);
3349 }
3350
3351 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3352 obj->obj_field_put(_operands_offset, value);
3353 }
3354
3355 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3356 obj->int_field_put(_mode_offset, value);
3357 }
3358
3359
3360 // java_lang_AccessibleObject
3361
3362 int java_lang_reflect_AccessibleObject::_override_offset;
3363
3364 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3365 macro(_override_offset, k, "override", bool_signature, false)
3366
3367 void java_lang_reflect_AccessibleObject::compute_offsets() {
3368 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3369 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3370 }
3371
3372 #if INCLUDE_CDS
3373 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3374 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3375 }
3376 #endif
3377
3378 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3379 return (jboolean) reflect->bool_field(_override_offset);
3380 }
3381
3382 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3383 reflect->bool_field_put(_override_offset, (int) value);
3384 }
3385
3386 // java_lang_reflect_Method
3387
3388 int java_lang_reflect_Method::_clazz_offset;
3389 int java_lang_reflect_Method::_name_offset;
3390 int java_lang_reflect_Method::_returnType_offset;
3391 int java_lang_reflect_Method::_parameterTypes_offset;
3392 int java_lang_reflect_Method::_exceptionTypes_offset;
3393 int java_lang_reflect_Method::_slot_offset;
3394 int java_lang_reflect_Method::_modifiers_offset;
3395 int java_lang_reflect_Method::_signature_offset;
3396 int java_lang_reflect_Method::_annotations_offset;
3397 int java_lang_reflect_Method::_parameter_annotations_offset;
3398 int java_lang_reflect_Method::_annotation_default_offset;
3399
3400 #define METHOD_FIELDS_DO(macro) \
3401 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3402 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3403 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
3404 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3405 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3406 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3407 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3408 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3409 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3410 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3411 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
3412
3413 void java_lang_reflect_Method::compute_offsets() {
3414 InstanceKlass* k = vmClasses::reflect_Method_klass();
3415 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3416 }
3417
3418 #if INCLUDE_CDS
3419 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3420 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3421 }
3422 #endif
3423
3424 Handle java_lang_reflect_Method::create(TRAPS) {
3425 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3426 Klass* klass = vmClasses::reflect_Method_klass();
3427 // This class is eagerly initialized during VM initialization, since we keep a reference
3428 // to one of the methods
3429 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
3430 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
3431 }
3432
3433 oop java_lang_reflect_Method::clazz(oop reflect) {
3434 return reflect->obj_field(_clazz_offset);
3435 }
3436
3437 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3438 reflect->obj_field_put(_clazz_offset, value);
3439 }
3440
3441 int java_lang_reflect_Method::slot(oop reflect) {
3442 return reflect->int_field(_slot_offset);
3443 }
3444
3445 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3446 reflect->int_field_put(_slot_offset, value);
3447 }
3448
3449 void java_lang_reflect_Method::set_name(oop method, oop value) {
3450 method->obj_field_put(_name_offset, value);
3451 }
3452
3453 oop java_lang_reflect_Method::return_type(oop method) {
3454 return method->obj_field(_returnType_offset);
3455 }
3456
3457 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3458 method->obj_field_put(_returnType_offset, value);
3459 }
3460
3461 oop java_lang_reflect_Method::parameter_types(oop method) {
3462 return method->obj_field(_parameterTypes_offset);
3463 }
3464
3465 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3466 method->obj_field_put(_parameterTypes_offset, value);
3467 }
3468
3469 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3470 method->obj_field_put(_exceptionTypes_offset, value);
3471 }
3472
3473 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3474 method->int_field_put(_modifiers_offset, value);
3475 }
3476
3477 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3478 method->obj_field_put(_signature_offset, value);
3479 }
3480
3481 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3482 method->obj_field_put(_annotations_offset, value);
3483 }
3484
3485 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3486 method->obj_field_put(_parameter_annotations_offset, value);
3487 }
3488
3489 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3490 method->obj_field_put(_annotation_default_offset, value);
3491 }
3492
3493 int java_lang_reflect_Constructor::_clazz_offset;
3494 int java_lang_reflect_Constructor::_parameterTypes_offset;
3495 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3496 int java_lang_reflect_Constructor::_slot_offset;
3497 int java_lang_reflect_Constructor::_modifiers_offset;
3498 int java_lang_reflect_Constructor::_signature_offset;
3499 int java_lang_reflect_Constructor::_annotations_offset;
3500 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3501
3502 #define CONSTRUCTOR_FIELDS_DO(macro) \
3503 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3504 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3505 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3506 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3507 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3508 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3509 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3510 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3511
3512 void java_lang_reflect_Constructor::compute_offsets() {
3513 InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3514 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3515 }
3516
3517 #if INCLUDE_CDS
3518 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3519 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3520 }
3521 #endif
3522
3523 Handle java_lang_reflect_Constructor::create(TRAPS) {
3524 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3525 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3526 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3527 InstanceKlass* ik = InstanceKlass::cast(k);
3528 // Ensure it is initialized
3529 ik->initialize(CHECK_NH);
3530 return ik->allocate_instance_handle(THREAD);
3531 }
3532
3533 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3534 return reflect->obj_field(_clazz_offset);
3535 }
3536
3537 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3538 reflect->obj_field_put(_clazz_offset, value);
3539 }
3540
3541 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3542 return constructor->obj_field(_parameterTypes_offset);
3543 }
3544
3545 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3546 constructor->obj_field_put(_parameterTypes_offset, value);
3547 }
3548
3549 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3550 constructor->obj_field_put(_exceptionTypes_offset, value);
3551 }
3552
3553 int java_lang_reflect_Constructor::slot(oop reflect) {
3554 return reflect->int_field(_slot_offset);
3555 }
3556
3557 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3558 reflect->int_field_put(_slot_offset, value);
3559 }
3560
3561 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3562 constructor->int_field_put(_modifiers_offset, value);
3563 }
3564
3565 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3566 constructor->obj_field_put(_signature_offset, value);
3567 }
3568
3569 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3570 constructor->obj_field_put(_annotations_offset, value);
3571 }
3572
3573 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3574 method->obj_field_put(_parameter_annotations_offset, value);
3575 }
3576
3577 int java_lang_reflect_Field::_clazz_offset;
3578 int java_lang_reflect_Field::_name_offset;
3579 int java_lang_reflect_Field::_type_offset;
3580 int java_lang_reflect_Field::_slot_offset;
3581 int java_lang_reflect_Field::_modifiers_offset;
3582 int java_lang_reflect_Field::_trusted_final_offset;
3583 int java_lang_reflect_Field::_signature_offset;
3584 int java_lang_reflect_Field::_annotations_offset;
3585
3586 #define FIELD_FIELDS_DO(macro) \
3587 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3588 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3589 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \
3590 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3591 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3592 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \
3593 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3594 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3595
3596 void java_lang_reflect_Field::compute_offsets() {
3597 InstanceKlass* k = vmClasses::reflect_Field_klass();
3598 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3599 }
3600
3601 #if INCLUDE_CDS
3602 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3603 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3604 }
3605 #endif
3606
3607 Handle java_lang_reflect_Field::create(TRAPS) {
3608 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3609 Symbol* name = vmSymbols::java_lang_reflect_Field();
3610 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3611 InstanceKlass* ik = InstanceKlass::cast(k);
3612 // Ensure it is initialized
3613 ik->initialize(CHECK_NH);
3614 return ik->allocate_instance_handle(THREAD);
3615 }
3616
3617 oop java_lang_reflect_Field::clazz(oop reflect) {
3618 return reflect->obj_field(_clazz_offset);
3619 }
3620
3621 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3622 reflect->obj_field_put(_clazz_offset, value);
3623 }
3624
3625 oop java_lang_reflect_Field::name(oop field) {
3626 return field->obj_field(_name_offset);
3627 }
3628
3629 void java_lang_reflect_Field::set_name(oop field, oop value) {
3630 field->obj_field_put(_name_offset, value);
3631 }
3632
3633 oop java_lang_reflect_Field::type(oop field) {
3634 return field->obj_field(_type_offset);
3635 }
3636
3637 void java_lang_reflect_Field::set_type(oop field, oop value) {
3638 field->obj_field_put(_type_offset, value);
3639 }
3640
3641 int java_lang_reflect_Field::slot(oop reflect) {
3642 return reflect->int_field(_slot_offset);
3643 }
3644
3645 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3646 reflect->int_field_put(_slot_offset, value);
3647 }
3648
3649 int java_lang_reflect_Field::modifiers(oop field) {
3650 return field->int_field(_modifiers_offset);
3651 }
3652
3653 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3654 field->int_field_put(_modifiers_offset, value);
3655 }
3656
3657 void java_lang_reflect_Field::set_trusted_final(oop field) {
3658 field->bool_field_put(_trusted_final_offset, true);
3659 }
3660
3661 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3662 field->obj_field_put(_signature_offset, value);
3663 }
3664
3665 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3666 field->obj_field_put(_annotations_offset, value);
3667 }
3668
3669 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3670 // Allocate java.lang.reflect.RecordComponent instance
3671 HandleMark hm(THREAD);
3672 InstanceKlass* ik = vmClasses::RecordComponent_klass();
3673 assert(ik != nullptr, "must be loaded");
3674 ik->initialize(CHECK_NULL);
3675
3676 Handle element = ik->allocate_instance_handle(CHECK_NULL);
3677
3678 Handle decl_class(THREAD, holder->java_mirror());
3679 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3680
3681 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3682 oop component_name = StringTable::intern(name, CHECK_NULL);
3683 java_lang_reflect_RecordComponent::set_name(element(), component_name);
3684
3685 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3686 Handle component_type_h =
3687 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3688 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3689
3690 Method* accessor_method = nullptr;
3691 {
3692 // Prepend "()" to type to create the full method signature.
3693 ResourceMark rm(THREAD);
3694 int sig_len = type->utf8_length() + 3; // "()" and null char
3695 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3696 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3697 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3698 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3699 }
3700
3701 if (accessor_method != nullptr) {
3702 methodHandle method(THREAD, accessor_method);
3703 oop m = Reflection::new_method(method, false, CHECK_NULL);
3704 java_lang_reflect_RecordComponent::set_accessor(element(), m);
3705 } else {
3706 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3707 }
3708
3709 int sig_index = component->generic_signature_index();
3710 if (sig_index > 0) {
3711 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3712 oop component_sig = StringTable::intern(sig, CHECK_NULL);
3713 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3714 } else {
3715 java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3716 }
3717
3718 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3719 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3720
3721 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3722 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3723
3724 return element();
3725 }
3726
3727 int reflect_ConstantPool::_oop_offset;
3728
3729 #define CONSTANTPOOL_FIELDS_DO(macro) \
3730 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3731
3732 void reflect_ConstantPool::compute_offsets() {
3733 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3734 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3735 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3736 }
3737
3738 #if INCLUDE_CDS
3739 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3740 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3741 }
3742 #endif
3743
3744 int java_lang_reflect_Parameter::_name_offset;
3745 int java_lang_reflect_Parameter::_modifiers_offset;
3746 int java_lang_reflect_Parameter::_index_offset;
3747 int java_lang_reflect_Parameter::_executable_offset;
3748
3749 #define PARAMETER_FIELDS_DO(macro) \
3750 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3751 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3752 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \
3753 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3754
3755 void java_lang_reflect_Parameter::compute_offsets() {
3756 InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3757 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3758 }
3759
3760 #if INCLUDE_CDS
3761 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3762 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3763 }
3764 #endif
3765
3766 Handle java_lang_reflect_Parameter::create(TRAPS) {
3767 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3768 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3769 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3770 InstanceKlass* ik = InstanceKlass::cast(k);
3771 // Ensure it is initialized
3772 ik->initialize(CHECK_NH);
3773 return ik->allocate_instance_handle(THREAD);
3774 }
3775
3776 oop java_lang_reflect_Parameter::name(oop param) {
3777 return param->obj_field(_name_offset);
3778 }
3779
3780 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3781 param->obj_field_put(_name_offset, value);
3782 }
3783
3784 int java_lang_reflect_Parameter::modifiers(oop param) {
3785 return param->int_field(_modifiers_offset);
3786 }
3787
3788 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3789 param->int_field_put(_modifiers_offset, value);
3790 }
3791
3792 int java_lang_reflect_Parameter::index(oop param) {
3793 return param->int_field(_index_offset);
3794 }
3795
3796 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3797 param->int_field_put(_index_offset, value);
3798 }
3799
3800 oop java_lang_reflect_Parameter::executable(oop param) {
3801 return param->obj_field(_executable_offset);
3802 }
3803
3804 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3805 param->obj_field_put(_executable_offset, value);
3806 }
3807
3808 // java_lang_Module
3809
3810 int java_lang_Module::_loader_offset;
3811 int java_lang_Module::_name_offset;
3812 int java_lang_Module::_module_entry_offset;
3813
3814 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3815 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3816 return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3817 vmSymbols::java_lang_module_init_signature(),
3818 loader, module_name, CHECK_NH);
3819 }
3820
3821 #define MODULE_FIELDS_DO(macro) \
3822 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3823 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false)
3824
3825 void java_lang_Module::compute_offsets() {
3826 InstanceKlass* k = vmClasses::Module_klass();
3827 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3828 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3829 }
3830
3831 #if INCLUDE_CDS
3832 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3833 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3834 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3835 }
3836 #endif
3837
3838 oop java_lang_Module::loader(oop module) {
3839 return module->obj_field(_loader_offset);
3840 }
3841
3842 void java_lang_Module::set_loader(oop module, oop value) {
3843 module->obj_field_put(_loader_offset, value);
3844 }
3845
3846 oop java_lang_Module::name(oop module) {
3847 return module->obj_field(_name_offset);
3848 }
3849
3850 void java_lang_Module::set_name(oop module, oop value) {
3851 module->obj_field_put(_name_offset, value);
3852 }
3853
3854 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3855 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3856 assert(module != nullptr, "module can't be null");
3857 assert(oopDesc::is_oop(module), "module must be oop");
3858
3859 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3860 return module_entry;
3861 }
3862
3863 ModuleEntry* java_lang_Module::module_entry(oop module) {
3864 ModuleEntry* module_entry = module_entry_raw(module);
3865 if (module_entry == nullptr) {
3866 // If the inject field containing the ModuleEntry* is null then return the
3867 // class loader's unnamed module.
3868 oop loader = java_lang_Module::loader(module);
3869 Handle h_loader = Handle(Thread::current(), loader);
3870 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3871 return loader_cld->unnamed_module();
3872 }
3873 return module_entry;
3874 }
3875
3876 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3877 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3878 assert(module != nullptr, "module can't be null");
3879 assert(oopDesc::is_oop(module), "module must be oop");
3880 module->address_field_put(_module_entry_offset, (address)module_entry);
3881 }
3882
3883 Handle reflect_ConstantPool::create(TRAPS) {
3884 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3885 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3886 // Ensure it is initialized
3887 k->initialize(CHECK_NH);
3888 return k->allocate_instance_handle(THREAD);
3889 }
3890
3891
3892 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3893 oop mirror = value->pool_holder()->java_mirror();
3894 // Save the mirror to get back the constant pool.
3895 reflect->obj_field_put(_oop_offset, mirror);
3896 }
3897
3898 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3899
3900 oop mirror = reflect->obj_field(_oop_offset);
3901 Klass* k = java_lang_Class::as_Klass(mirror);
3902 assert(k->is_instance_klass(), "Must be");
3903
3904 // Get the constant pool back from the klass. Since class redefinition
3905 // merges the new constant pool into the old, this is essentially the
3906 // same constant pool as the original. If constant pool merging is
3907 // no longer done in the future, this will have to change to save
3908 // the original.
3909 return InstanceKlass::cast(k)->constants();
3910 }
3911
3912
3913 // Support for java_lang_ref_Reference
3914
3915 bool java_lang_ref_Reference::_offsets_initialized;
3916
3917 int java_lang_ref_Reference::_referent_offset;
3918 int java_lang_ref_Reference::_queue_offset;
3919 int java_lang_ref_Reference::_next_offset;
3920 int java_lang_ref_Reference::_discovered_offset;
3921
3922 #define REFERENCE_FIELDS_DO(macro) \
3923 macro(_referent_offset, k, "referent", object_signature, false); \
3924 macro(_queue_offset, k, "queue", referencequeue_signature, false); \
3925 macro(_next_offset, k, "next", reference_signature, false); \
3926 macro(_discovered_offset, k, "discovered", reference_signature, false);
3927
3928 void java_lang_ref_Reference::compute_offsets() {
3929 if (_offsets_initialized) {
3930 return;
3931 }
3932 _offsets_initialized = true;
3933 InstanceKlass* k = vmClasses::Reference_klass();
3934 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3935 }
3936
3937 #if INCLUDE_CDS
3938 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3939 f->do_bool(&_offsets_initialized);
3940 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3941 }
3942 #endif
3943
3944 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3945 assert(obj != nullptr, "sanity");
3946 if (offset != _referent_offset) {
3947 return false;
3948 }
3949
3950 Klass* k = obj->klass();
3951 if (!k->is_instance_klass()) {
3952 return false;
3953 }
3954
3955 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3956 bool is_reference = ik->reference_type() != REF_NONE;
3957 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
3958 return is_reference;
3959 }
3960
3961 int java_lang_boxing_object::_value_offset;
3962 int java_lang_boxing_object::_long_value_offset;
3963
3964 #define BOXING_FIELDS_DO(macro) \
3965 macro(_value_offset, integerKlass, "value", int_signature, false); \
3966 macro(_long_value_offset, longKlass, "value", long_signature, false);
3967
3968 void java_lang_boxing_object::compute_offsets() {
3969 InstanceKlass* integerKlass = vmClasses::Integer_klass();
3970 InstanceKlass* longKlass = vmClasses::Long_klass();
3971 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3972 }
3973
3974 #if INCLUDE_CDS
3975 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
3976 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3977 }
3978 #endif
3979
3980 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3981 Klass* k = vmClasses::box_klass(type);
3982 if (k == nullptr) return nullptr;
3983 InstanceKlass* ik = InstanceKlass::cast(k);
3984 if (!ik->is_initialized()) {
3985 ik->initialize(CHECK_NULL);
3986 }
3987 return ik->allocate_instance(THREAD);
3988 }
3989
3990
3991 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3992 oop box = initialize_and_allocate(type, CHECK_NULL);
3993 if (box == nullptr) return nullptr;
3994 switch (type) {
3995 case T_BOOLEAN:
3996 box->bool_field_put(_value_offset, value->z);
3997 break;
3998 case T_CHAR:
3999 box->char_field_put(_value_offset, value->c);
4000 break;
4001 case T_FLOAT:
4002 box->float_field_put(_value_offset, value->f);
4003 break;
4004 case T_DOUBLE:
4005 box->double_field_put(_long_value_offset, value->d);
4006 break;
4007 case T_BYTE:
4008 box->byte_field_put(_value_offset, value->b);
4009 break;
4010 case T_SHORT:
4011 box->short_field_put(_value_offset, value->s);
4012 break;
4013 case T_INT:
4014 box->int_field_put(_value_offset, value->i);
4015 break;
4016 case T_LONG:
4017 box->long_field_put(_long_value_offset, value->j);
4018 break;
4019 default:
4020 return nullptr;
4021 }
4022 return box;
4023 }
4024
4025
4026 BasicType java_lang_boxing_object::basic_type(oop box) {
4027 if (box == nullptr) return T_ILLEGAL;
4028 BasicType type = vmClasses::box_klass_type(box->klass());
4029 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
4030 return T_ILLEGAL;
4031 return type;
4032 }
4033
4034
4035 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
4036 BasicType type = vmClasses::box_klass_type(box->klass());
4037 switch (type) {
4038 case T_BOOLEAN:
4039 value->z = box->bool_field(_value_offset);
4040 break;
4041 case T_CHAR:
4042 value->c = box->char_field(_value_offset);
4043 break;
4044 case T_FLOAT:
4045 value->f = box->float_field(_value_offset);
4046 break;
4047 case T_DOUBLE:
4048 value->d = box->double_field(_long_value_offset);
4049 break;
4050 case T_BYTE:
4051 value->b = box->byte_field(_value_offset);
4052 break;
4053 case T_SHORT:
4054 value->s = box->short_field(_value_offset);
4055 break;
4056 case T_INT:
4057 value->i = box->int_field(_value_offset);
4058 break;
4059 case T_LONG:
4060 value->j = box->long_field(_long_value_offset);
4061 break;
4062 default:
4063 return T_ILLEGAL;
4064 } // end switch
4065 return type;
4066 }
4067
4068
4069 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
4070 BasicType type = vmClasses::box_klass_type(box->klass());
4071 switch (type) {
4072 case T_BOOLEAN:
4073 box->bool_field_put(_value_offset, value->z);
4074 break;
4075 case T_CHAR:
4076 box->char_field_put(_value_offset, value->c);
4077 break;
4078 case T_FLOAT:
4079 box->float_field_put(_value_offset, value->f);
4080 break;
4081 case T_DOUBLE:
4082 box->double_field_put(_long_value_offset, value->d);
4083 break;
4084 case T_BYTE:
4085 box->byte_field_put(_value_offset, value->b);
4086 break;
4087 case T_SHORT:
4088 box->short_field_put(_value_offset, value->s);
4089 break;
4090 case T_INT:
4091 box->int_field_put(_value_offset, value->i);
4092 break;
4093 case T_LONG:
4094 box->long_field_put(_long_value_offset, value->j);
4095 break;
4096 default:
4097 return T_ILLEGAL;
4098 } // end switch
4099 return type;
4100 }
4101
4102
4103 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
4104 switch (type) {
4105 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
4106 case T_CHAR: st->print("%d", value->c); break;
4107 case T_BYTE: st->print("%d", value->b); break;
4108 case T_SHORT: st->print("%d", value->s); break;
4109 case T_INT: st->print("%d", value->i); break;
4110 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
4111 case T_FLOAT: st->print("%f", value->f); break;
4112 case T_DOUBLE: st->print("%lf", value->d); break;
4113 default: st->print("type %d?", type); break;
4114 }
4115 }
4116
4117
4118 // Support for java_lang_ref_SoftReference
4119 //
4120
4121 int java_lang_ref_SoftReference::_timestamp_offset;
4122 int java_lang_ref_SoftReference::_static_clock_offset;
4123
4124 #define SOFTREFERENCE_FIELDS_DO(macro) \
4125 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
4126 macro(_static_clock_offset, k, "clock", long_signature, true)
4127
4128 void java_lang_ref_SoftReference::compute_offsets() {
4129 InstanceKlass* k = vmClasses::SoftReference_klass();
4130 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4131 }
4132
4133 #if INCLUDE_CDS
4134 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
4135 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4136 }
4137 #endif
4138
4139 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
4140 return ref->long_field(_timestamp_offset);
4141 }
4142
4143 jlong java_lang_ref_SoftReference::clock() {
4144 InstanceKlass* ik = vmClasses::SoftReference_klass();
4145 oop base = ik->static_field_base_raw();
4146 return base->long_field(_static_clock_offset);
4147 }
4148
4149 void java_lang_ref_SoftReference::set_clock(jlong value) {
4150 InstanceKlass* ik = vmClasses::SoftReference_klass();
4151 oop base = ik->static_field_base_raw();
4152 base->long_field_put(_static_clock_offset, value);
4153 }
4154
4155 // Support for java_lang_invoke_DirectMethodHandle
4156
4157 int java_lang_invoke_DirectMethodHandle::_member_offset;
4158
4159 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
4160 oop member_name = nullptr;
4161 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
4162 "a DirectMethodHandle oop is expected");
4163 return dmh->obj_field(_member_offset);
4164 }
4165
4166 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
4167 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
4168
4169 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
4170 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
4171 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4172 }
4173
4174 #if INCLUDE_CDS
4175 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
4176 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4177 }
4178 #endif
4179
4180 // Support for java_lang_invoke_MethodHandle
4181
4182 int java_lang_invoke_MethodHandle::_type_offset;
4183 int java_lang_invoke_MethodHandle::_form_offset;
4184
4185 int java_lang_invoke_MemberName::_clazz_offset;
4186 int java_lang_invoke_MemberName::_name_offset;
4187 int java_lang_invoke_MemberName::_type_offset;
4188 int java_lang_invoke_MemberName::_flags_offset;
4189 int java_lang_invoke_MemberName::_method_offset;
4190 int java_lang_invoke_MemberName::_vmindex_offset;
4191
4192 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
4193 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
4194
4195 int java_lang_invoke_LambdaForm::_vmentry_offset;
4196
4197 #define METHODHANDLE_FIELDS_DO(macro) \
4198 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4199 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
4200
4201 void java_lang_invoke_MethodHandle::compute_offsets() {
4202 InstanceKlass* k = vmClasses::MethodHandle_klass();
4203 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4204 }
4205
4206 #if INCLUDE_CDS
4207 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4208 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4209 }
4210 #endif
4211
4212 #define MEMBERNAME_FIELDS_DO(macro) \
4213 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4214 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4215 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
4216 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
4217 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
4218
4219 void java_lang_invoke_MemberName::compute_offsets() {
4220 InstanceKlass* k = vmClasses::MemberName_klass();
4221 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4222 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4223 }
4224
4225 #if INCLUDE_CDS
4226 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4227 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4228 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4229 }
4230 #endif
4231
4232 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4233 macro(_vmholder_offset, k, "vmholder", class_signature, false)
4234
4235 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4236 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4237 assert(k != nullptr, "jdk mismatch");
4238 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4239 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4240 }
4241
4242 #if INCLUDE_CDS
4243 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4244 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4245 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4246 }
4247 #endif
4248
4249 #define LAMBDAFORM_FIELDS_DO(macro) \
4250 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4251
4252 void java_lang_invoke_LambdaForm::compute_offsets() {
4253 InstanceKlass* k = vmClasses::LambdaForm_klass();
4254 assert (k != nullptr, "jdk mismatch");
4255 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4256 }
4257
4258 #if INCLUDE_CDS
4259 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4260 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4261 }
4262 #endif
4263
4264 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4265 return obj != nullptr && is_subclass(obj->klass());
4266 }
4267
4268 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4269 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4270
4271 #define NEP_FIELDS_DO(macro) \
4272 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
4273 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4274
4275 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4276 return obj != nullptr && is_subclass(obj->klass());
4277 }
4278
4279 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4280 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4281 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4282 }
4283
4284 #if INCLUDE_CDS
4285 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4286 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4287 }
4288 #endif
4289
4290 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4291 return entry->obj_field(_method_type_offset);
4292 }
4293
4294 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4295 return entry->long_field(_downcall_stub_address_offset);
4296 }
4297
4298 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4299 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4300 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4301 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4302 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4303 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4304 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4305
4306 #define ABIDescriptor_FIELDS_DO(macro) \
4307 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4308 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4309 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4310 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4311 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4312 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4313 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4314
4315 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4316 return obj != nullptr && is_subclass(obj->klass());
4317 }
4318
4319 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4320 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4321 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4322 }
4323
4324 #if INCLUDE_CDS
4325 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4326 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4327 }
4328 #endif
4329
4330 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4331 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4332 }
4333
4334 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4335 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4336 }
4337
4338 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4339 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4340 }
4341
4342 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4343 return entry->int_field(_stackAlignment_offset);
4344 }
4345
4346 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4347 return entry->int_field(_shadowSpace_offset);
4348 }
4349
4350 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4351 return entry->obj_field(_scratch1_offset);
4352 }
4353
4354 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4355 return entry->obj_field(_scratch2_offset);
4356 }
4357
4358 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4359 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4360 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4361 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4362
4363 #define VMStorage_FIELDS_DO(macro) \
4364 macro(_type_offset, k, "type", byte_signature, false); \
4365 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4366 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4367 macro(_debugName_offset, k, "debugName", string_signature, false); \
4368
4369 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4370 return obj != nullptr && is_subclass(obj->klass());
4371 }
4372
4373 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4374 InstanceKlass* k = vmClasses::VMStorage_klass();
4375 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4376 }
4377
4378 #if INCLUDE_CDS
4379 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4380 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4381 }
4382 #endif
4383
4384 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4385 return entry->byte_field(_type_offset);
4386 }
4387
4388 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4389 return entry->int_field(_indexOrOffset_offset);
4390 }
4391
4392 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4393 return entry->short_field(_segmentMaskOrSize_offset);
4394 }
4395
4396 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4397 return entry->obj_field(_debugName_offset);
4398 }
4399
4400 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4401 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4402
4403 #define CallConv_FIELDS_DO(macro) \
4404 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4405 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4406
4407 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4408 return obj != nullptr && is_subclass(obj->klass());
4409 }
4410
4411 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4412 InstanceKlass* k = vmClasses::CallConv_klass();
4413 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4414 }
4415
4416 #if INCLUDE_CDS
4417 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4418 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4419 }
4420 #endif
4421
4422 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4423 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4424 }
4425
4426 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4427 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4428 }
4429
4430 oop java_lang_invoke_MethodHandle::type(oop mh) {
4431 return mh->obj_field(_type_offset);
4432 }
4433
4434 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4435 mh->obj_field_put(_type_offset, mtype);
4436 }
4437
4438 oop java_lang_invoke_MethodHandle::form(oop mh) {
4439 assert(_form_offset != 0, "");
4440 return mh->obj_field(_form_offset);
4441 }
4442
4443 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4444 assert(_form_offset != 0, "");
4445 mh->obj_field_put(_form_offset, lform);
4446 }
4447
4448 /// MemberName accessors
4449
4450 oop java_lang_invoke_MemberName::clazz(oop mname) {
4451 assert(is_instance(mname), "wrong type");
4452 return mname->obj_field(_clazz_offset);
4453 }
4454
4455 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4456 assert(is_instance(mname), "wrong type");
4457 mname->obj_field_put(_clazz_offset, clazz);
4458 }
4459
4460 oop java_lang_invoke_MemberName::name(oop mname) {
4461 assert(is_instance(mname), "wrong type");
4462 return mname->obj_field(_name_offset);
4463 }
4464
4465 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4466 assert(is_instance(mname), "wrong type");
4467 mname->obj_field_put(_name_offset, name);
4468 }
4469
4470 oop java_lang_invoke_MemberName::type(oop mname) {
4471 assert(is_instance(mname), "wrong type");
4472 return mname->obj_field(_type_offset);
4473 }
4474
4475 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4476 assert(is_instance(mname), "wrong type");
4477 mname->obj_field_put(_type_offset, type);
4478 }
4479
4480 int java_lang_invoke_MemberName::flags(oop mname) {
4481 assert(is_instance(mname), "wrong type");
4482 return mname->int_field(_flags_offset);
4483 }
4484
4485 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4486 assert(is_instance(mname), "wrong type");
4487 mname->int_field_put(_flags_offset, flags);
4488 }
4489
4490
4491 // Return vmtarget from ResolvedMethodName method field through indirection
4492 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4493 assert(is_instance(mname), "wrong type");
4494 oop method = mname->obj_field(_method_offset);
4495 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4496 }
4497
4498 bool java_lang_invoke_MemberName::is_method(oop mname) {
4499 assert(is_instance(mname), "must be MemberName");
4500 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
4501 }
4502
4503 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4504 assert(is_instance(mname), "wrong type");
4505 mname->obj_field_put(_method_offset, resolved_method);
4506 }
4507
4508 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4509 assert(is_instance(mname), "wrong type");
4510 return (intptr_t) mname->address_field(_vmindex_offset);
4511 }
4512
4513 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4514 assert(is_instance(mname), "wrong type");
4515 mname->address_field_put(_vmindex_offset, (address) index);
4516 }
4517
4518
4519 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4520 assert(is_instance(resolved_method), "wrong type");
4521 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4522 assert(m->is_method(), "must be");
4523 return m;
4524 }
4525
4526 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4527 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4528 assert(is_instance(resolved_method), "wrong type");
4529 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4530 }
4531
4532 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4533 assert(is_instance(resolved_method), "wrong type");
4534 resolved_method->obj_field_put(_vmholder_offset, holder);
4535 }
4536
4537 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4538 const Method* method = m();
4539
4540 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4541 oop resolved_method = ResolvedMethodTable::find_method(method);
4542 if (resolved_method != nullptr) {
4543 return resolved_method;
4544 }
4545
4546 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4547 if (!k->is_initialized()) {
4548 k->initialize(CHECK_NULL);
4549 }
4550
4551 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4552
4553 NoSafepointVerifier nsv;
4554
4555 if (method->is_old()) {
4556 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4557 method->get_new_method();
4558 }
4559
4560 InstanceKlass* holder = method->method_holder();
4561
4562 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4563 // Add a reference to the loader (actually mirror because hidden classes may not have
4564 // distinct loaders) to ensure the metadata is kept alive.
4565 // This mirror may be different than the one in clazz field.
4566 set_vmholder(new_resolved_method, holder->java_mirror());
4567
4568 // Set flag in class to indicate this InstanceKlass has entries in the table
4569 // to avoid walking table during redefinition if none of the redefined classes
4570 // have any membernames in the table.
4571 holder->set_has_resolved_methods();
4572
4573 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4574 }
4575
4576 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4577 assert(is_instance(lform), "wrong type");
4578 return lform->obj_field(_vmentry_offset);
4579 }
4580
4581
4582 // Support for java_lang_invoke_MethodType
4583
4584 int java_lang_invoke_MethodType::_rtype_offset;
4585 int java_lang_invoke_MethodType::_ptypes_offset;
4586
4587 #define METHODTYPE_FIELDS_DO(macro) \
4588 macro(_rtype_offset, k, "rtype", class_signature, false); \
4589 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4590
4591 void java_lang_invoke_MethodType::compute_offsets() {
4592 InstanceKlass* k = vmClasses::MethodType_klass();
4593 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4594 }
4595
4596 #if INCLUDE_CDS
4597 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4598 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4599 }
4600 #endif
4601
4602 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4603 st->print("(");
4604 objArrayOop pts = ptypes(mt);
4605 if (pts != nullptr) {
4606 for (int i = 0, limit = pts->length(); i < limit; i++) {
4607 java_lang_Class::print_signature(pts->obj_at(i), st);
4608 }
4609 } else {
4610 st->print("null");
4611 }
4612 st->print(")");
4613 oop rt = rtype(mt);
4614 if (rt != nullptr) {
4615 java_lang_Class::print_signature(rt, st);
4616 } else {
4617 st->print("null");
4618 }
4619 }
4620
4621 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4622 ResourceMark rm;
4623 stringStream buffer(128);
4624 print_signature(mt, &buffer);
4625 const char* sigstr = buffer.base();
4626 int siglen = (int) buffer.size();
4627 Symbol *name;
4628 if (!intern_if_not_found) {
4629 name = SymbolTable::probe(sigstr, siglen);
4630 } else {
4631 name = SymbolTable::new_symbol(sigstr, siglen);
4632 }
4633 return name;
4634 }
4635
4636 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4637 if (mt1 == mt2)
4638 return true;
4639 if (rtype(mt1) != rtype(mt2))
4640 return false;
4641 if (ptype_count(mt1) != ptype_count(mt2))
4642 return false;
4643 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4644 if (ptype(mt1, i) != ptype(mt2, i))
4645 return false;
4646 }
4647 return true;
4648 }
4649
4650 oop java_lang_invoke_MethodType::rtype(oop mt) {
4651 assert(is_instance(mt), "must be a MethodType");
4652 return mt->obj_field(_rtype_offset);
4653 }
4654
4655 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4656 assert(is_instance(mt), "must be a MethodType");
4657 return (objArrayOop) mt->obj_field(_ptypes_offset);
4658 }
4659
4660 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4661 return ptypes(mt)->obj_at(idx);
4662 }
4663
4664 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4665 return ptypes(mt)->length();
4666 }
4667
4668 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4669 objArrayOop pts = ptypes(mt);
4670 int count = pts->length();
4671 int slots = 0;
4672 for (int i = 0; i < count; i++) {
4673 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4674 slots += type2size[bt];
4675 }
4676 return slots;
4677 }
4678
4679 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4680 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4681 return type2size[bt];
4682 }
4683
4684
4685 // Support for java_lang_invoke_CallSite
4686
4687 int java_lang_invoke_CallSite::_target_offset;
4688 int java_lang_invoke_CallSite::_context_offset;
4689
4690 #define CALLSITE_FIELDS_DO(macro) \
4691 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
4692 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
4693
4694 void java_lang_invoke_CallSite::compute_offsets() {
4695 InstanceKlass* k = vmClasses::CallSite_klass();
4696 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4697 }
4698
4699 #if INCLUDE_CDS
4700 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4701 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4702 }
4703 #endif
4704
4705 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
4706 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4707
4708 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
4709 return dep_oop;
4710 }
4711
4712 // Support for java_lang_invoke_ConstantCallSite
4713
4714 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4715
4716 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4717 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4718
4719 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4720 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4721 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4722 }
4723
4724 #if INCLUDE_CDS
4725 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4726 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4727 }
4728 #endif
4729
4730 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
4731
4732 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
4733 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
4734
4735 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
4736 InstanceKlass* k = vmClasses::Context_klass();
4737 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4738 }
4739
4740 #if INCLUDE_CDS
4741 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
4742 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4743 }
4744 #endif
4745
4746 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
4747 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
4748 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4749 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4750 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4751 return dep_ctx;
4752 }
4753
4754 // Support for java_lang_ClassLoader
4755
4756 int java_lang_ClassLoader::_loader_data_offset;
4757 int java_lang_ClassLoader::_parallelCapable_offset;
4758 int java_lang_ClassLoader::_name_offset;
4759 int java_lang_ClassLoader::_nameAndId_offset;
4760 int java_lang_ClassLoader::_unnamedModule_offset;
4761 int java_lang_ClassLoader::_parent_offset;
4762
4763 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4764 assert(loader != nullptr, "loader must not be null");
4765 assert(oopDesc::is_oop(loader), "loader must be oop");
4766 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4767 }
4768
4769 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4770 assert(loader != nullptr, "loader must not be null");
4771 assert(oopDesc::is_oop(loader), "loader must be oop");
4772 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4773 }
4774
4775 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4776 assert(loader != nullptr, "loader must not be null");
4777 assert(oopDesc::is_oop(loader), "loader must be oop");
4778 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4779 }
4780
4781 #define CLASSLOADER_FIELDS_DO(macro) \
4782 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4783 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4784 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
4785 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4786 macro(_parent_offset, k1, "parent", classloader_signature, false)
4787
4788 void java_lang_ClassLoader::compute_offsets() {
4789 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4790 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4791
4792 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4793 }
4794
4795 #if INCLUDE_CDS
4796 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4797 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4798 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4799 }
4800 #endif
4801
4802 oop java_lang_ClassLoader::parent(oop loader) {
4803 assert(is_instance(loader), "loader must be oop");
4804 return loader->obj_field(_parent_offset);
4805 }
4806
4807 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4808 assert(is_instance(loader), "loader must be oop");
4809 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4810 }
4811
4812 // Returns the name field of this class loader. If the name field has not
4813 // been set, null will be returned.
4814 oop java_lang_ClassLoader::name(oop loader) {
4815 assert(is_instance(loader), "loader must be oop");
4816 return loader->obj_field(_name_offset);
4817 }
4818
4819 // Returns the nameAndId field of this class loader. The format is
4820 // as follows:
4821 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4822 // If the defining loader has no name then <qualified-class-name> @<id>
4823 // If built-in loader, then omit '@<id>' as there is only one instance.
4824 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4825 oop java_lang_ClassLoader::nameAndId(oop loader) {
4826 assert(is_instance(loader), "loader must be oop");
4827 return loader->obj_field(_nameAndId_offset);
4828 }
4829
4830 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4831 assert(is_instance(loader), "loader must be oop");
4832 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4833 oop acl = loader;
4834 debug_only(jint loop_count = 0);
4835 // This loop taken verbatim from ClassLoader.java:
4836 do {
4837 acl = parent(acl);
4838 if (cl == acl) {
4839 return true;
4840 }
4841 assert(++loop_count > 0, "loop_count overflow");
4842 } while (acl != nullptr);
4843 return false;
4844 }
4845
4846 bool java_lang_ClassLoader::is_instance(oop obj) {
4847 return obj != nullptr && is_subclass(obj->klass());
4848 }
4849
4850
4851 // For class loader classes, parallelCapable defined
4852 // based on non-null field
4853 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4854 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4855 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4856 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4857 }
4858
4859 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4860 oop cl = SystemDictionary::java_system_loader();
4861 while(cl != nullptr) {
4862 if (cl == loader) return true;
4863 cl = parent(cl);
4864 }
4865 return false;
4866 }
4867
4868 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4869 assert(is_instance(loader), "loader must be oop");
4870 return loader->obj_field(_unnamedModule_offset);
4871 }
4872
4873 // Support for java_lang_System
4874 //
4875
4876 int java_lang_System::_static_in_offset;
4877 int java_lang_System::_static_out_offset;
4878 int java_lang_System::_static_err_offset;
4879
4880 #define SYSTEM_FIELDS_DO(macro) \
4881 macro(_static_in_offset, k, "in", input_stream_signature, true); \
4882 macro(_static_out_offset, k, "out", print_stream_signature, true); \
4883 macro(_static_err_offset, k, "err", print_stream_signature, true);
4884
4885 void java_lang_System::compute_offsets() {
4886 InstanceKlass* k = vmClasses::System_klass();
4887 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4888 }
4889
4890 #if INCLUDE_CDS
4891 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4892 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4893 }
4894 #endif
4895
4896 // Support for jdk_internal_misc_UnsafeConstants
4897 //
4898 class UnsafeConstantsFixup : public FieldClosure {
4899 private:
4900 int _address_size;
4901 int _page_size;
4902 bool _big_endian;
4903 bool _use_unaligned_access;
4904 int _data_cache_line_flush_size;
4905 public:
4906 UnsafeConstantsFixup() {
4907 // round up values for all static final fields
4908 _address_size = sizeof(void*);
4909 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4910 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4911 _use_unaligned_access = UseUnalignedAccesses;
4912 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4913 }
4914
4915 void do_field(fieldDescriptor* fd) {
4916 oop mirror = fd->field_holder()->java_mirror();
4917 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4918 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4919 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4920 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4921 if (fd->name() == vmSymbols::address_size_name()) {
4922 mirror->int_field_put(fd->offset(), _address_size);
4923 } else if (fd->name() == vmSymbols::page_size_name()) {
4924 mirror->int_field_put(fd->offset(), _page_size);
4925 } else if (fd->name() == vmSymbols::big_endian_name()) {
4926 mirror->bool_field_put(fd->offset(), _big_endian);
4927 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4928 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4929 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4930 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4931 } else {
4932 assert(false, "unexpected UnsafeConstants field");
4933 }
4934 }
4935 };
4936
4937 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4938 UnsafeConstantsFixup fixup;
4939 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4940 }
4941
4942
4943 // java_lang_StackTraceElement
4944
4945 int java_lang_StackTraceElement::_methodName_offset;
4946 int java_lang_StackTraceElement::_fileName_offset;
4947 int java_lang_StackTraceElement::_lineNumber_offset;
4948 int java_lang_StackTraceElement::_moduleName_offset;
4949 int java_lang_StackTraceElement::_moduleVersion_offset;
4950 int java_lang_StackTraceElement::_classLoaderName_offset;
4951 int java_lang_StackTraceElement::_declaringClass_offset;
4952 int java_lang_StackTraceElement::_declaringClassObject_offset;
4953
4954 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4955 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4956 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4957 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
4958 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4959 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
4960 macro(_methodName_offset, k, "methodName", string_signature, false); \
4961 macro(_fileName_offset, k, "fileName", string_signature, false); \
4962 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
4963
4964 // Support for java_lang_StackTraceElement
4965 void java_lang_StackTraceElement::compute_offsets() {
4966 InstanceKlass* k = vmClasses::StackTraceElement_klass();
4967 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4968 }
4969
4970 #if INCLUDE_CDS
4971 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4972 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4973 }
4974 #endif
4975
4976 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4977 element->obj_field_put(_fileName_offset, value);
4978 }
4979
4980 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4981 element->obj_field_put(_declaringClass_offset, value);
4982 }
4983
4984 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4985 element->obj_field_put(_methodName_offset, value);
4986 }
4987
4988 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4989 element->int_field_put(_lineNumber_offset, value);
4990 }
4991
4992 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4993 element->obj_field_put(_moduleName_offset, value);
4994 }
4995
4996 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4997 element->obj_field_put(_moduleVersion_offset, value);
4998 }
4999
5000 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
5001 element->obj_field_put(_classLoaderName_offset, value);
5002 }
5003
5004 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
5005 element->obj_field_put(_declaringClassObject_offset, value);
5006 }
5007
5008
5009 // java_lang_AssertionStatusDirectives
5010
5011 int java_lang_AssertionStatusDirectives::_classes_offset;
5012 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
5013 int java_lang_AssertionStatusDirectives::_packages_offset;
5014 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
5015 int java_lang_AssertionStatusDirectives::_deflt_offset;
5016
5017 // Support for java Assertions - java_lang_AssertionStatusDirectives.
5018 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
5019 macro(_classes_offset, k, "classes", string_array_signature, false); \
5020 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
5021 macro(_packages_offset, k, "packages", string_array_signature, false); \
5022 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
5023 macro(_deflt_offset, k, "deflt", bool_signature, false)
5024
5025 void java_lang_AssertionStatusDirectives::compute_offsets() {
5026 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
5027 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5028 }
5029
5030 #if INCLUDE_CDS
5031 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
5032 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5033 }
5034 #endif
5035
5036 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
5037 o->obj_field_put(_classes_offset, val);
5038 }
5039
5040 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
5041 o->obj_field_put(_classEnabled_offset, val);
5042 }
5043
5044 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
5045 o->obj_field_put(_packages_offset, val);
5046 }
5047
5048 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
5049 o->obj_field_put(_packageEnabled_offset, val);
5050 }
5051
5052 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
5053 o->bool_field_put(_deflt_offset, val);
5054 }
5055
5056 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
5057
5058 #define AOS_FIELDS_DO(macro) \
5059 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
5060
5061 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
5062 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
5063 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5064 }
5065
5066 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
5067 assert(_owner_offset != 0, "Must be initialized");
5068 return obj->obj_field(_owner_offset);
5069 }
5070
5071 #if INCLUDE_CDS
5072 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
5073 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5074 }
5075 #endif
5076
5077 int vector_VectorPayload::_payload_offset;
5078
5079 #define VECTORPAYLOAD_FIELDS_DO(macro) \
5080 macro(_payload_offset, k, "payload", object_signature, false)
5081
5082 void vector_VectorPayload::compute_offsets() {
5083 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
5084 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5085 }
5086
5087 #if INCLUDE_CDS
5088 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
5089 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5090 }
5091 #endif
5092
5093 void vector_VectorPayload::set_payload(oop o, oop val) {
5094 o->obj_field_put(_payload_offset, val);
5095 }
5096
5097 bool vector_VectorPayload::is_instance(oop obj) {
5098 return obj != nullptr && is_subclass(obj->klass());
5099 }
5100
5101 int java_lang_Integer_IntegerCache::_static_cache_offset;
5102 int java_lang_Long_LongCache::_static_cache_offset;
5103 int java_lang_Character_CharacterCache::_static_cache_offset;
5104 int java_lang_Short_ShortCache::_static_cache_offset;
5105 int java_lang_Byte_ByteCache::_static_cache_offset;
5106
5107 #define INTEGER_CACHE_FIELDS_DO(macro) \
5108 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5109
5110 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5111 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5112 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5113 }
5114
5115 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5116 oop base = ik->static_field_base_raw();
5117 return objArrayOop(base->obj_field(_static_cache_offset));
5118 }
5119
5120 Symbol* java_lang_Integer_IntegerCache::symbol() {
5121 return vmSymbols::java_lang_Integer_IntegerCache();
5122 }
5123
5124 #if INCLUDE_CDS
5125 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5126 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5127 }
5128 #endif
5129 #undef INTEGER_CACHE_FIELDS_DO
5130
5131 jint java_lang_Integer::value(oop obj) {
5132 jvalue v;
5133 java_lang_boxing_object::get_value(obj, &v);
5134 return v.i;
5135 }
5136
5137 #define LONG_CACHE_FIELDS_DO(macro) \
5138 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5139
5140 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5141 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5142 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5143 }
5144
5145 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5146 oop base = ik->static_field_base_raw();
5147 return objArrayOop(base->obj_field(_static_cache_offset));
5148 }
5149
5150 Symbol* java_lang_Long_LongCache::symbol() {
5151 return vmSymbols::java_lang_Long_LongCache();
5152 }
5153
5154 #if INCLUDE_CDS
5155 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5156 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5157 }
5158 #endif
5159 #undef LONG_CACHE_FIELDS_DO
5160
5161 jlong java_lang_Long::value(oop obj) {
5162 jvalue v;
5163 java_lang_boxing_object::get_value(obj, &v);
5164 return v.j;
5165 }
5166
5167 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5168 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5169
5170 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5171 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5172 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5173 }
5174
5175 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5176 oop base = ik->static_field_base_raw();
5177 return objArrayOop(base->obj_field(_static_cache_offset));
5178 }
5179
5180 Symbol* java_lang_Character_CharacterCache::symbol() {
5181 return vmSymbols::java_lang_Character_CharacterCache();
5182 }
5183
5184 #if INCLUDE_CDS
5185 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5186 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5187 }
5188 #endif
5189 #undef CHARACTER_CACHE_FIELDS_DO
5190
5191 jchar java_lang_Character::value(oop obj) {
5192 jvalue v;
5193 java_lang_boxing_object::get_value(obj, &v);
5194 return v.c;
5195 }
5196
5197 #define SHORT_CACHE_FIELDS_DO(macro) \
5198 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5199
5200 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5201 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5202 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5203 }
5204
5205 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5206 oop base = ik->static_field_base_raw();
5207 return objArrayOop(base->obj_field(_static_cache_offset));
5208 }
5209
5210 Symbol* java_lang_Short_ShortCache::symbol() {
5211 return vmSymbols::java_lang_Short_ShortCache();
5212 }
5213
5214 #if INCLUDE_CDS
5215 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5216 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5217 }
5218 #endif
5219 #undef SHORT_CACHE_FIELDS_DO
5220
5221 jshort java_lang_Short::value(oop obj) {
5222 jvalue v;
5223 java_lang_boxing_object::get_value(obj, &v);
5224 return v.s;
5225 }
5226
5227 #define BYTE_CACHE_FIELDS_DO(macro) \
5228 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5229
5230 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5231 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5232 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5233 }
5234
5235 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5236 oop base = ik->static_field_base_raw();
5237 return objArrayOop(base->obj_field(_static_cache_offset));
5238 }
5239
5240 Symbol* java_lang_Byte_ByteCache::symbol() {
5241 return vmSymbols::java_lang_Byte_ByteCache();
5242 }
5243
5244 #if INCLUDE_CDS
5245 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5246 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5247 }
5248 #endif
5249 #undef BYTE_CACHE_FIELDS_DO
5250
5251 jbyte java_lang_Byte::value(oop obj) {
5252 jvalue v;
5253 java_lang_boxing_object::get_value(obj, &v);
5254 return v.b;
5255 }
5256
5257 int java_lang_Boolean::_static_TRUE_offset;
5258 int java_lang_Boolean::_static_FALSE_offset;
5259
5260 #define BOOLEAN_FIELDS_DO(macro) \
5261 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5262 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5263
5264
5265 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5266 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5267 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5268 }
5269
5270 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5271 oop base = ik->static_field_base_raw();
5272 return base->obj_field(_static_TRUE_offset);
5273 }
5274
5275 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5276 oop base = ik->static_field_base_raw();
5277 return base->obj_field(_static_FALSE_offset);
5278 }
5279
5280 Symbol* java_lang_Boolean::symbol() {
5281 return vmSymbols::java_lang_Boolean();
5282 }
5283
5284 #if INCLUDE_CDS
5285 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5286 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5287 }
5288 #endif
5289 #undef BOOLEAN_CACHE_FIELDS_DO
5290
5291 jboolean java_lang_Boolean::value(oop obj) {
5292 jvalue v;
5293 java_lang_boxing_object::get_value(obj, &v);
5294 return v.z;
5295 }
5296
5297 // java_lang_reflect_RecordComponent
5298
5299 int java_lang_reflect_RecordComponent::_clazz_offset;
5300 int java_lang_reflect_RecordComponent::_name_offset;
5301 int java_lang_reflect_RecordComponent::_type_offset;
5302 int java_lang_reflect_RecordComponent::_accessor_offset;
5303 int java_lang_reflect_RecordComponent::_signature_offset;
5304 int java_lang_reflect_RecordComponent::_annotations_offset;
5305 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5306
5307 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5308 macro(_clazz_offset, k, "clazz", class_signature, false); \
5309 macro(_name_offset, k, "name", string_signature, false); \
5310 macro(_type_offset, k, "type", class_signature, false); \
5311 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5312 macro(_signature_offset, k, "signature", string_signature, false); \
5313 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5314 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5315
5316 // Support for java_lang_reflect_RecordComponent
5317 void java_lang_reflect_RecordComponent::compute_offsets() {
5318 InstanceKlass* k = vmClasses::RecordComponent_klass();
5319 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5320 }
5321
5322 #if INCLUDE_CDS
5323 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5324 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5325 }
5326 #endif
5327
5328 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5329 element->obj_field_put(_clazz_offset, value);
5330 }
5331
5332 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5333 element->obj_field_put(_name_offset, value);
5334 }
5335
5336 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5337 element->obj_field_put(_type_offset, value);
5338 }
5339
5340 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5341 element->obj_field_put(_accessor_offset, value);
5342 }
5343
5344 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5345 element->obj_field_put(_signature_offset, value);
5346 }
5347
5348 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5349 element->obj_field_put(_annotations_offset, value);
5350 }
5351
5352 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5353 element->obj_field_put(_typeAnnotations_offset, value);
5354 }
5355
5356 // java_lang_InternalError
5357 int java_lang_InternalError::_during_unsafe_access_offset;
5358
5359 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5360 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5361 }
5362
5363 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5364 return internal_error->bool_field(_during_unsafe_access_offset);
5365 }
5366
5367 void java_lang_InternalError::compute_offsets() {
5368 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5369 }
5370
5371 #if INCLUDE_CDS
5372 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5373 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5374 }
5375 #endif
5376
5377 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5378 f(java_lang_Class) \
5379 f(java_lang_String) \
5380 f(java_lang_ref_Reference) \
5381 //end
5382
5383 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5384 f(java_lang_System) \
5385 f(java_lang_ClassLoader) \
5386 f(java_lang_Throwable) \
5387 f(java_lang_Thread) \
5388 f(java_lang_Thread_FieldHolder) \
5389 f(java_lang_Thread_Constants) \
5390 f(java_lang_ThreadGroup) \
5391 f(java_lang_VirtualThread) \
5392 f(java_lang_InternalError) \
5393 f(java_lang_AssertionStatusDirectives) \
5394 f(java_lang_ref_SoftReference) \
5395 f(java_lang_invoke_MethodHandle) \
5396 f(java_lang_invoke_DirectMethodHandle) \
5397 f(java_lang_invoke_MemberName) \
5398 f(java_lang_invoke_ResolvedMethodName) \
5399 f(java_lang_invoke_LambdaForm) \
5400 f(java_lang_invoke_MethodType) \
5401 f(java_lang_invoke_CallSite) \
5402 f(java_lang_invoke_ConstantCallSite) \
5403 f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \
5404 f(java_lang_reflect_AccessibleObject) \
5405 f(java_lang_reflect_Method) \
5406 f(java_lang_reflect_Constructor) \
5407 f(java_lang_reflect_Field) \
5408 f(java_lang_reflect_RecordComponent) \
5409 f(reflect_ConstantPool) \
5410 f(java_lang_reflect_Parameter) \
5411 f(java_lang_Module) \
5412 f(java_lang_StackTraceElement) \
5413 f(java_lang_ClassFrameInfo) \
5414 f(java_lang_StackFrameInfo) \
5415 f(java_lang_LiveStackFrameInfo) \
5416 f(jdk_internal_vm_ContinuationScope) \
5417 f(jdk_internal_vm_Continuation) \
5418 f(jdk_internal_vm_StackChunk) \
5419 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5420 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5421 f(jdk_internal_foreign_abi_ABIDescriptor) \
5422 f(jdk_internal_foreign_abi_VMStorage) \
5423 f(jdk_internal_foreign_abi_CallConv) \
5424 f(jdk_internal_misc_UnsafeConstants) \
5425 f(java_lang_boxing_object) \
5426 f(vector_VectorPayload) \
5427 //end
5428
5429 #define BASIC_JAVA_CLASSES_DO(f) \
5430 BASIC_JAVA_CLASSES_DO_PART1(f) \
5431 BASIC_JAVA_CLASSES_DO_PART2(f)
5432
5433 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5434
5435 // Compute field offsets of all the classes in this file
5436 void JavaClasses::compute_offsets() {
5437 if (CDSConfig::is_using_archive()) {
5438 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5439 JvmtiExport::has_early_class_hook_env()),
5440 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5441 // None of the classes used by the rest of this function can be replaced by
5442 // JVMTI ClassFileLoadHook.
5443 // We are safe to use the archived offsets, which have already been restored
5444 // by JavaClasses::serialize_offsets, without computing the offsets again.
5445 return;
5446 }
5447
5448 // We have already called the compute_offsets() of the
5449 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5450 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5451 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5452 }
5453
5454 #if INCLUDE_CDS
5455 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5456
5457 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5458 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5459 }
5460 #endif
5461
5462 #if INCLUDE_CDS_JAVA_HEAP
5463 bool JavaClasses::is_supported_for_archiving(oop obj) {
5464 Klass* klass = obj->klass();
5465
5466 if (!CDSConfig::is_dumping_invokedynamic()) {
5467 // These are supported by CDS only when CDSConfig::is_dumping_invokedynamic() is enabled.
5468 if (klass == vmClasses::ResolvedMethodName_klass() ||
5469 klass == vmClasses::MemberName_klass() ||
5470 klass == vmClasses::Context_klass()) {
5471 return false;
5472 }
5473 }
5474
5475 if (klass->is_subclass_of(vmClasses::Reference_klass())) {
5476 // It's problematic to archive Reference objects. One of the reasons is that
5477 // Reference::discovered may pull in unwanted objects (see JDK-8284336)
5478 return false;
5479 }
5480
5481 return true;
5482 }
5483 #endif
5484
5485 #ifndef PRODUCT
5486
5487 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5488
5489 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5490 const char* field_sig) {
5491 EXCEPTION_MARK;
5492 fieldDescriptor fd;
5493 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5494 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5495 InstanceKlass* ik = InstanceKlass::cast(k);
5496 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5497 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5498 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5499 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5500 return false;
5501 }
5502 if (fd.is_static()) {
5503 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5504 return false;
5505 }
5506 if (fd.offset() == deserialized_offset ) {
5507 return true;
5508 } else {
5509 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5510 klass_name, field_name, deserialized_offset, fd.offset());
5511 return false;
5512 }
5513 }
5514
5515 void JavaClasses::check_offsets() {
5516 bool valid = true;
5517
5518 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5519 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5520
5521 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5522 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5523
5524 // Boxed primitive objects (java_lang_boxing_object)
5525
5526 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
5527 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5528 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
5529 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5530 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
5531 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
5532 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
5533 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5534
5535 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5536 }
5537
5538 #endif // PRODUCT
5539
5540 int InjectedField::compute_offset() {
5541 InstanceKlass* ik = InstanceKlass::cast(klass());
5542 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5543 if (!may_be_java && !fs.field_flags().is_injected()) {
5544 // Only look at injected fields
5545 continue;
5546 }
5547 if (fs.name() == name() && fs.signature() == signature()) {
5548 return fs.offset();
5549 }
5550 }
5551 ResourceMark rm;
5552 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)" : "");
5553 #ifndef PRODUCT
5554 ik->print();
5555 tty->print_cr("all fields:");
5556 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5557 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_field_flags());
5558 }
5559 #endif //PRODUCT
5560 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5561 return -1;
5562 }
5563
5564 void javaClasses_init() {
5565 JavaClasses::compute_offsets();
5566 JavaClasses::check_offsets();
5567 FilteredFieldsMap::initialize(); // must be done after computing offsets.
5568 }