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