1 /*
2 * Copyright (c) 1997, 2023, 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/heapShared.hpp"
29 #include "cds/metaspaceShared.hpp"
30 #include "classfile/altHashing.hpp"
31 #include "classfile/classLoaderData.inline.hpp"
32 #include "classfile/javaClasses.inline.hpp"
33 #include "classfile/javaClassesImpl.hpp"
34 #include "classfile/javaThreadStatus.hpp"
35 #include "classfile/moduleEntry.hpp"
36 #include "classfile/stringTable.hpp"
37 #include "classfile/symbolTable.hpp"
38 #include "classfile/systemDictionary.hpp"
39 #include "classfile/vmClasses.hpp"
40 #include "classfile/vmSymbols.hpp"
41 #include "code/debugInfo.hpp"
42 #include "code/dependencyContext.hpp"
43 #include "code/pcDesc.hpp"
44 #include "gc/shared/collectedHeap.inline.hpp"
45 #include "interpreter/interpreter.hpp"
46 #include "interpreter/linkResolver.hpp"
47 #include "jvm.h"
48 #include "logging/log.hpp"
49 #include "logging/logStream.hpp"
50 #include "memory/oopFactory.hpp"
51 #include "memory/resourceArea.hpp"
52 #include "memory/universe.hpp"
53 #include "oops/fieldInfo.hpp"
54 #include "oops/fieldStreams.inline.hpp"
55 #include "oops/instanceKlass.inline.hpp"
56 #include "oops/instanceMirrorKlass.hpp"
57 #include "oops/klass.hpp"
58 #include "oops/klass.inline.hpp"
59 #include "oops/method.inline.hpp"
60 #include "oops/objArrayKlass.hpp"
61 #include "oops/objArrayOop.inline.hpp"
62 #include "oops/oopCast.inline.hpp"
63 #include "oops/oop.inline.hpp"
64 #include "oops/symbol.hpp"
65 #include "oops/recordComponent.hpp"
66 #include "oops/typeArrayOop.inline.hpp"
67 #include "prims/jvmtiExport.hpp"
68 #include "prims/methodHandles.hpp"
69 #include "prims/resolvedMethodTable.hpp"
70 #include "runtime/continuationEntry.inline.hpp"
71 #include "runtime/continuationJavaClasses.inline.hpp"
72 #include "runtime/fieldDescriptor.inline.hpp"
73 #include "runtime/frame.inline.hpp"
74 #include "runtime/handles.inline.hpp"
75 #include "runtime/handshake.hpp"
76 #include "runtime/init.hpp"
77 #include "runtime/interfaceSupport.inline.hpp"
78 #include "runtime/java.hpp"
79 #include "runtime/javaCalls.hpp"
80 #include "runtime/javaThread.hpp"
81 #include "runtime/jniHandles.inline.hpp"
82 #include "runtime/reflectionUtils.hpp"
83 #include "runtime/safepoint.hpp"
84 #include "runtime/safepointVerifiers.hpp"
85 #include "runtime/threadSMR.hpp"
86 #include "runtime/vframe.inline.hpp"
87 #include "runtime/vm_version.hpp"
88 #include "utilities/align.hpp"
89 #include "utilities/growableArray.hpp"
90 #include "utilities/preserveException.hpp"
91 #include "utilities/utf8.hpp"
92 #if INCLUDE_JVMCI
93 #include "jvmci/jvmciJavaClasses.hpp"
94 #endif
95
96 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
97 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
98
99 InjectedField JavaClasses::_injected_fields[] = {
100 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
101 };
102
103 // Register native methods of Object
104 void java_lang_Object::register_natives(TRAPS) {
105 InstanceKlass* obj = vmClasses::Object_klass();
106 Method::register_native(obj, vmSymbols::hashCode_name(),
107 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
108 Method::register_native(obj, vmSymbols::wait_name(),
109 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
110 Method::register_native(obj, vmSymbols::notify_name(),
111 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
112 Method::register_native(obj, vmSymbols::notifyAll_name(),
113 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
114 Method::register_native(obj, vmSymbols::clone_name(),
115 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
116 }
117
118 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
119 return _injected_fields[(int)id].compute_offset();
120 }
121
122 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
123 *field_count = 0;
124
125 vmSymbolID sid = vmSymbols::find_sid(class_name);
126 if (sid == vmSymbolID::NO_SID) {
127 // Only well known classes can inject fields
128 return nullptr;
129 }
130
131 int count = 0;
132 int start = -1;
133
134 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
135 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \
136 count++; \
137 if (start == -1) { \
138 start = (int)InjectedFieldID::klass##_##name##_enum; \
139 } \
140 }
141 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
142 #undef LOOKUP_INJECTED_FIELD
143
144 if (start != -1) {
145 *field_count = count;
146 return _injected_fields + start;
147 }
148 return nullptr;
149 }
150
151
152 // Helpful routine for computing field offsets at run time rather than hardcoding them
153 // Finds local fields only, including static fields. Static field offsets are from the
154 // beginning of the mirror.
155 void JavaClasses::compute_offset(int &dest_offset,
156 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
157 bool is_static) {
158 fieldDescriptor fd;
159 if (ik == nullptr) {
160 ResourceMark rm;
161 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
162 vm_exit_during_initialization("Invalid layout of well-known class");
163 }
164
165 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
166 ResourceMark rm;
167 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
168 name_symbol->as_C_string(), signature_symbol->as_C_string());
169 #ifndef PRODUCT
170 // Prints all fields and offsets
171 Log(class) lt;
172 LogStream ls(lt.error());
173 ik->print_on(&ls);
174 #endif //PRODUCT
175 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
176 }
177 dest_offset = fd.offset();
178 }
179
180 // Overloading to pass name as a string.
181 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
182 const char* name_string, Symbol* signature_symbol,
183 bool is_static) {
184 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
185 if (name == nullptr) {
186 ResourceMark rm;
187 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
188 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
189 }
190 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
191 }
192
193 // java_lang_String
194
195 int java_lang_String::_value_offset;
196 int java_lang_String::_hash_offset;
197 int java_lang_String::_hashIsZero_offset;
198 int java_lang_String::_coder_offset;
199 int java_lang_String::_flags_offset;
200
201 bool java_lang_String::_initialized;
202
203
204 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
205 uint8_t* addr = flags_addr(java_string);
206 uint8_t value = Atomic::load(addr);
207 while ((value & flag_mask) == 0) {
208 uint8_t old_value = value;
209 value |= flag_mask;
210 value = Atomic::cmpxchg(addr, old_value, value);
211 if (value == old_value) return false; // Flag bit changed from 0 to 1.
212 }
213 return true; // Flag bit is already 1.
214 }
215
216 #define STRING_FIELDS_DO(macro) \
217 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
218 macro(_hash_offset, k, "hash", int_signature, false); \
219 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
220 macro(_coder_offset, k, "coder", byte_signature, false);
221
222 void java_lang_String::compute_offsets() {
223 if (_initialized) {
224 return;
225 }
226
227 InstanceKlass* k = vmClasses::String_klass();
228 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
229 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
230
231 _initialized = true;
232 }
233
234 #if INCLUDE_CDS
235 void java_lang_String::serialize_offsets(SerializeClosure* f) {
236 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
237 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
238 f->do_bool(&_initialized);
239 }
240 #endif
241
242 class CompactStringsFixup : public FieldClosure {
243 private:
244 bool _value;
245
246 public:
247 CompactStringsFixup(bool value) : _value(value) {}
248
249 void do_field(fieldDescriptor* fd) {
250 if (fd->name() == vmSymbols::compact_strings_name()) {
251 oop mirror = fd->field_holder()->java_mirror();
252 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String");
253 assert(mirror != nullptr, "String must have mirror already");
254 mirror->bool_field_put(fd->offset(), _value);
255 }
256 }
257 };
258
259 void java_lang_String::set_compact_strings(bool value) {
260 CompactStringsFixup fix(value);
261 vmClasses::String_klass()->do_local_static_fields(&fix);
262 }
263
264 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
265 assert(_initialized, "Must be initialized");
266 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
267
268 // Create the String object first, so there's a chance that the String
269 // and the char array it points to end up in the same cache line.
270 oop obj;
271 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH);
272
273 // Create the char array. The String object must be handlized here
274 // because GC can happen as a result of the allocation attempt.
275 Handle h_obj(THREAD, obj);
276 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
277 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
278
279 // Point the String at the char array
280 obj = h_obj();
281 set_value(obj, buffer);
282 // No need to zero the offset, allocation zero'ed the entire String object
283 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
284 return h_obj;
285 }
286
287 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
288 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
289 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
290 typeArrayOop buffer = value(h_obj());
291 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
292 if (is_latin1) {
293 for (int index = 0; index < length; index++) {
294 buffer->byte_at_put(index, (jbyte)unicode[index]);
295 }
296 } else {
297 for (int index = 0; index < length; index++) {
298 buffer->char_at_put(index, unicode[index]);
299 }
300 }
301
302 #ifdef ASSERT
303 {
304 ResourceMark rm;
305 char* expected = UNICODE::as_utf8(unicode, length);
306 char* actual = as_utf8_string(h_obj());
307 if (strcmp(expected, actual) != 0) {
308 fatal("Unicode conversion failure: %s --> %s", expected, actual);
309 }
310 }
311 #endif
312
313 return h_obj;
314 }
315
316 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
317 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
318 return h_obj();
319 }
320
321 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
322 if (utf8_str == nullptr) {
323 return Handle();
324 }
325 bool has_multibyte, is_latin1;
326 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
327 if (!CompactStrings) {
328 has_multibyte = true;
329 is_latin1 = false;
330 }
331
332 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
333 if (length > 0) {
334 if (!has_multibyte) {
335 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
336 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
337 } else if (is_latin1) {
338 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
339 } else {
340 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
341 }
342 }
343
344 #ifdef ASSERT
345 // This check is too strict when the input string is not a valid UTF8.
346 // For example, it may be created with arbitrary content via jni_NewStringUTF.
347 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, (int)strlen(utf8_str), false)) {
348 ResourceMark rm;
349 const char* expected = utf8_str;
350 char* actual = as_utf8_string(h_obj());
351 if (strcmp(expected, actual) != 0) {
352 fatal("String conversion failure: %s --> %s", expected, actual);
353 }
354 }
355 #endif
356
357 return h_obj;
358 }
359
360 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
361 Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
362 return h_obj();
363 }
364
365 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
366 const char* utf8_str = (char*)symbol->bytes();
367 int utf8_len = symbol->utf8_length();
368
369 bool has_multibyte, is_latin1;
370 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
371 if (!CompactStrings) {
372 has_multibyte = true;
373 is_latin1 = false;
374 }
375
376 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
377 if (length > 0) {
378 if (!has_multibyte) {
379 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
380 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
381 } else if (is_latin1) {
382 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
383 } else {
384 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
385 }
386 }
387
388 #ifdef ASSERT
389 {
390 ResourceMark rm;
391 const char* expected = symbol->as_utf8();
392 char* actual = as_utf8_string(h_obj());
393 if (strncmp(expected, actual, utf8_len) != 0) {
394 fatal("Symbol conversion failure: %s --> %s", expected, actual);
395 }
396 }
397 #endif
398
399 return h_obj;
400 }
401
402 // Converts a C string to a Java String based on current encoding
403 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
404 assert(str != nullptr, "bad arguments");
405
406 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
407 static to_java_string_fn_t _to_java_string_fn = nullptr;
408
409 if (_to_java_string_fn == nullptr) {
410 void *lib_handle = os::native_java_library();
411 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
412 #if defined(_WIN32) && !defined(_WIN64)
413 if (_to_java_string_fn == nullptr) {
414 // On 32 bit Windows, also try __stdcall decorated name
415 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8"));
416 }
417 #endif
418 if (_to_java_string_fn == nullptr) {
419 fatal("JNU_NewStringPlatform missing");
420 }
421 }
422
423 jstring js = nullptr;
424 {
425 JavaThread* thread = THREAD;
426 HandleMark hm(thread);
427 ThreadToNativeFromVM ttn(thread);
428 js = (_to_java_string_fn)(thread->jni_environment(), str);
429 }
430
431 Handle native_platform_string(THREAD, JNIHandles::resolve(js));
432 JNIHandles::destroy_local(js); // destroy local JNIHandle.
433 return native_platform_string;
434 }
435
436 // Converts a Java String to a native C string that can be used for
437 // native OS calls.
438 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
439 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
440 static to_platform_string_fn_t _to_platform_string_fn = nullptr;
441
442 if (_to_platform_string_fn == nullptr) {
443 void *lib_handle = os::native_java_library();
444 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
445 if (_to_platform_string_fn == nullptr) {
446 fatal("GetStringPlatformChars missing");
447 }
448 }
449
450 char *native_platform_string;
451 jstring js;
452 { JavaThread* thread = THREAD;
453 js = (jstring) JNIHandles::make_local(thread, java_string());
454 HandleMark hm(thread);
455 ThreadToNativeFromVM ttn(thread);
456 JNIEnv *env = thread->jni_environment();
457 bool is_copy;
458 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
459 assert(is_copy == JNI_TRUE, "is_copy value changed");
460 }
461
462 // Uses a store barrier and therefore needs to be in vm state
463 JNIHandles::destroy_local(js);
464
465 return native_platform_string;
466 }
467
468 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
469 ResourceMark rm(THREAD);
470 return create_from_str(java_name->as_klass_external_name(), THREAD);
471 }
472
473 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
474 jchar* result = as_unicode_string_or_null(java_string, length);
475 if (result == nullptr) {
476 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
477 }
478 return result;
479 }
480
481 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
482 typeArrayOop value = java_lang_String::value(java_string);
483 length = java_lang_String::length(java_string, value);
484 bool is_latin1 = java_lang_String::is_latin1(java_string);
485
486 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
487 if (result != nullptr) {
488 if (!is_latin1) {
489 for (int index = 0; index < length; index++) {
490 result[index] = value->char_at(index);
491 }
492 } else {
493 for (int index = 0; index < length; index++) {
494 result[index] = ((jchar) value->byte_at(index)) & 0xff;
495 }
496 }
497 }
498 return result;
499 }
500
501 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
502 // The hash and hashIsZero fields are subject to a benign data race,
503 // making it crucial to ensure that any observable result of the
504 // calculation in this method stays correct under any possible read of
505 // these fields. Necessary restrictions to allow this to be correct
506 // without explicit memory fences or similar concurrency primitives is
507 // that we can ever only write to one of these two fields for a given
508 // String instance, and that the computation is idempotent and derived
509 // from immutable state
510 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
511 if (java_lang_String::hash_is_set(java_string)) {
512 return java_string->int_field(_hash_offset);
513 }
514
515 typeArrayOop value = java_lang_String::value(java_string);
516 int length = java_lang_String::length(java_string, value);
517 bool is_latin1 = java_lang_String::is_latin1(java_string);
518
519 unsigned int hash = 0;
520 if (length > 0) {
521 if (is_latin1) {
522 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
523 } else {
524 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
525 }
526 }
527
528 if (update) {
529 if (hash != 0) {
530 java_string->int_field_put(_hash_offset, hash);
531 } else {
532 java_string->bool_field_put(_hashIsZero_offset, true);
533 }
534 }
535 return hash;
536 }
537
538 unsigned int java_lang_String::hash_code(oop java_string) {
539 return hash_code_impl(java_string, /*update=*/true);
540 }
541
542 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
543 return hash_code_impl(java_string, /*update=*/false);
544 }
545
546
547 char* java_lang_String::as_quoted_ascii(oop java_string) {
548 typeArrayOop value = java_lang_String::value(java_string);
549 int length = java_lang_String::length(java_string, value);
550 bool is_latin1 = java_lang_String::is_latin1(java_string);
551
552 if (length == 0) return nullptr;
553
554 char* result;
555 int result_length;
556 if (!is_latin1) {
557 jchar* base = value->char_at_addr(0);
558 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
559 result = NEW_RESOURCE_ARRAY(char, result_length);
560 UNICODE::as_quoted_ascii(base, length, result, result_length);
561 } else {
562 jbyte* base = value->byte_at_addr(0);
563 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
564 result = NEW_RESOURCE_ARRAY(char, result_length);
565 UNICODE::as_quoted_ascii(base, length, result, result_length);
566 }
567 assert(result_length >= length + 1, "must not be shorter");
568 assert(result_length == (int)strlen(result) + 1, "must match");
569 return result;
570 }
571
572 Symbol* java_lang_String::as_symbol(oop java_string) {
573 typeArrayOop value = java_lang_String::value(java_string);
574 int length = java_lang_String::length(java_string, value);
575 bool is_latin1 = java_lang_String::is_latin1(java_string);
576 if (!is_latin1) {
577 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
578 Symbol* sym = SymbolTable::new_symbol(base, length);
579 return sym;
580 } else {
581 ResourceMark rm;
582 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
583 const char* base = UNICODE::as_utf8(position, length);
584 Symbol* sym = SymbolTable::new_symbol(base, length);
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 const char* base = UNICODE::as_utf8(position, length);
600 return SymbolTable::probe(base, length);
601 }
602 }
603
604 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
605 assert(value_equals(value, java_lang_String::value(java_string)),
606 "value must be same as java_lang_String::value(java_string)");
607 int length = java_lang_String::length(java_string, value);
608 if (length == 0) {
609 return 0;
610 }
611 if (!java_lang_String::is_latin1(java_string)) {
612 return UNICODE::utf8_length(value->char_at_addr(0), length);
613 } else {
614 return UNICODE::utf8_length(value->byte_at_addr(0), length);
615 }
616 }
617
618 int java_lang_String::utf8_length(oop java_string) {
619 typeArrayOop value = java_lang_String::value(java_string);
620 return utf8_length(java_string, value);
621 }
622
623 char* java_lang_String::as_utf8_string(oop java_string) {
624 int length;
625 return as_utf8_string(java_string, length);
626 }
627
628 char* java_lang_String::as_utf8_string(oop java_string, int& length) {
629 typeArrayOop value = java_lang_String::value(java_string);
630 length = java_lang_String::length(java_string, value);
631 bool is_latin1 = java_lang_String::is_latin1(java_string);
632 if (!is_latin1) {
633 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
634 return UNICODE::as_utf8(position, length);
635 } else {
636 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
637 return UNICODE::as_utf8(position, length);
638 }
639 }
640
641 // Uses a provided buffer if it's sufficiently large, otherwise allocates
642 // a resource array to fit
643 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, int buflen, int& utf8_len) {
644 typeArrayOop value = java_lang_String::value(java_string);
645 int len = java_lang_String::length(java_string, value);
646 bool is_latin1 = java_lang_String::is_latin1(java_string);
647 if (!is_latin1) {
648 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
649 utf8_len = UNICODE::utf8_length(position, len);
650 if (utf8_len >= buflen) {
651 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
652 }
653 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
654 } else {
655 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
656 utf8_len = UNICODE::utf8_length(position, len);
657 if (utf8_len >= buflen) {
658 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
659 }
660 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
661 }
662 }
663
664 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) {
665 assert(value_equals(value, java_lang_String::value(java_string)),
666 "value must be same as java_lang_String::value(java_string)");
667 int length = 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 = (length == 0) ? nullptr : value->char_at_addr(0);
671 return UNICODE::as_utf8(position, length, buf, buflen);
672 } else {
673 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
674 return UNICODE::as_utf8(position, length, buf, buflen);
675 }
676 }
677
678 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
679 typeArrayOop value = java_lang_String::value(java_string);
680 return as_utf8_string(java_string, value, buf, buflen);
681 }
682
683 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
684 typeArrayOop value = java_lang_String::value(java_string);
685 bool is_latin1 = java_lang_String::is_latin1(java_string);
686 assert(start + len <= java_lang_String::length(java_string), "just checking");
687 if (!is_latin1) {
688 jchar* position = value->char_at_addr(start);
689 return UNICODE::as_utf8(position, len);
690 } else {
691 jbyte* position = value->byte_at_addr(start);
692 return UNICODE::as_utf8(position, len);
693 }
694 }
695
696 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) {
697 assert(value_equals(value, java_lang_String::value(java_string)),
698 "value must be same as java_lang_String::value(java_string)");
699 assert(start + len <= java_lang_String::length(java_string), "just checking");
700 bool is_latin1 = java_lang_String::is_latin1(java_string);
701 if (!is_latin1) {
702 jchar* position = value->char_at_addr(start);
703 return UNICODE::as_utf8(position, len, buf, buflen);
704 } else {
705 jbyte* position = value->byte_at_addr(start);
706 return UNICODE::as_utf8(position, len, buf, buflen);
707 }
708 }
709
710 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
711 assert(java_string->klass() == vmClasses::String_klass(),
712 "must be java_string");
713 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
714 int length = java_lang_String::length(java_string, value);
715 if (length != len) {
716 return false;
717 }
718 bool is_latin1 = java_lang_String::is_latin1(java_string);
719 if (!is_latin1) {
720 for (int i = 0; i < len; i++) {
721 if (value->char_at(i) != chars[i]) {
722 return false;
723 }
724 }
725 } else {
726 for (int i = 0; i < len; i++) {
727 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
728 return false;
729 }
730 }
731 }
732 return true;
733 }
734
735 bool java_lang_String::equals(oop str1, oop str2) {
736 assert(str1->klass() == vmClasses::String_klass(),
737 "must be java String");
738 assert(str2->klass() == vmClasses::String_klass(),
739 "must be java String");
740 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
741 bool is_latin1 = java_lang_String::is_latin1(str1);
742 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
743 bool is_latin2 = java_lang_String::is_latin1(str2);
744
745 if (is_latin1 != is_latin2) {
746 // Strings with different coders are never equal.
747 return false;
748 }
749 return value_equals(value1, value2);
750 }
751
752 void java_lang_String::print(oop java_string, outputStream* st) {
753 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
754 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
755
756 if (value == nullptr) {
757 // This can happen if, e.g., printing a String
758 // object before its initializer has been called
759 st->print("nullptr");
760 return;
761 }
762
763 int length = java_lang_String::length(java_string, value);
764 bool is_latin1 = java_lang_String::is_latin1(java_string);
765
766 st->print("\"");
767 for (int index = 0; index < length; index++) {
768 st->print("%c", (!is_latin1) ? value->char_at(index) :
769 ((jchar) value->byte_at(index)) & 0xff );
770 }
771 st->print("\"");
772 }
773
774 // java_lang_Class
775
776 int java_lang_Class::_klass_offset;
777 int java_lang_Class::_array_klass_offset;
778 int java_lang_Class::_oop_size_offset;
779 int java_lang_Class::_static_oop_field_count_offset;
780 int java_lang_Class::_class_loader_offset;
781 int java_lang_Class::_module_offset;
782 int java_lang_Class::_protection_domain_offset;
783 int java_lang_Class::_component_mirror_offset;
784 int java_lang_Class::_signers_offset;
785 int java_lang_Class::_name_offset;
786 int java_lang_Class::_source_file_offset;
787 int java_lang_Class::_classData_offset;
788 int java_lang_Class::_classRedefinedCount_offset;
789
790 bool java_lang_Class::_offsets_computed = false;
791 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
792 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
793
794 #ifdef ASSERT
795 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
796 assert(fd->has_initial_value(), "caller should have checked this");
797 assert(fd->field_type() == T_OBJECT, "caller should have checked this");
798 // Can't use vmSymbols::string_signature() as fd->signature() may have been relocated
799 // during DumpSharedSpaces
800 assert(fd->signature()->equals("Ljava/lang/String;"), "just checking");
801 }
802 #endif
803
804 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
805 DEBUG_ONLY(assert_valid_static_string_field(fd);)
806 oop string = fd->string_initial_value(CHECK);
807 mirror()->obj_field_put(fd->offset(), string);
808 }
809
810 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
811 assert(fd->has_initial_value(), "caller should have checked this");
812 BasicType t = fd->field_type();
813 switch (t) {
814 case T_BYTE:
815 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
816 break;
817 case T_BOOLEAN:
818 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
819 break;
820 case T_CHAR:
821 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
822 break;
823 case T_SHORT:
824 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
825 break;
826 case T_INT:
827 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
828 break;
829 case T_FLOAT:
830 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
831 break;
832 case T_DOUBLE:
833 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
834 break;
835 case T_LONG:
836 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
837 break;
838 default:
839 // Illegal ConstantValue attribute in class file should have been
840 // caught during classfile parsing.
841 ShouldNotReachHere();
842 }
843 }
844
845 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
846 assert(mirror.not_null() && fd->is_static(), "just checking");
847 if (fd->has_initial_value()) {
848 if (fd->field_type() != T_OBJECT) {
849 initialize_static_primitive_field(fd, mirror);
850 } else {
851 initialize_static_string_field(fd, mirror, CHECK);
852 }
853 }
854 }
855
856 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
857 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
858
859 // If the offset was read from the shared archive, it was fixed up already
860 if (!k->is_shared()) {
861 if (k->is_instance_klass()) {
862 // During bootstrap, java.lang.Class wasn't loaded so static field
863 // offsets were computed without the size added it. Go back and
864 // update all the static field offsets to included the size.
865
866 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
867 // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
868 // static fields offsets are updated in this array before reencoding everything into
869 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
870
871 int java_fields;
872 int injected_fields;
873 InstanceKlass* ik = InstanceKlass::cast(k);
874 GrowableArray<FieldInfo>* fields =
875 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
876 &java_fields, &injected_fields);
877 for (int i = 0; i < fields->length(); i++) {
878 FieldInfo* fi = fields->adr_at(i);
879 if (fi->access_flags().is_static()) {
880 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
881 }
882 }
883 Array<u1>* old_stream = ik->fieldinfo_stream();
884 assert(fields->length() == (java_fields + injected_fields), "Must be");
885 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
886 ik->set_fieldinfo_stream(new_fis);
887 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
888 }
889 }
890
891 if (k->is_shared() && k->has_archived_mirror_index()) {
892 if (ArchiveHeapLoader::are_archived_mirrors_available()) {
893 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
894 assert(present, "Missing archived mirror for %s", k->external_name());
895 return;
896 } else {
897 k->clear_java_mirror_handle();
898 k->clear_archived_mirror_index();
899 }
900 }
901 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
902 }
903
904 void java_lang_Class::initialize_mirror_fields(Klass* k,
905 Handle mirror,
906 Handle protection_domain,
907 Handle classData,
908 TRAPS) {
909 // Set protection domain also
910 set_protection_domain(mirror(), protection_domain());
911
912 // Initialize static fields
913 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
914
915 // Set classData
916 set_class_data(mirror(), classData());
917 }
918
919 // Set the java.lang.Module module field in the java_lang_Class mirror
920 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
921 if (module.is_null()) {
922 // During startup, the module may be null only if java.base has not been defined yet.
923 // Put the class on the fixup_module_list to patch later when the java.lang.Module
924 // for java.base is known. But note that since we captured the null module another
925 // thread may have completed that initialization.
926
927 bool javabase_was_defined = false;
928 {
929 MutexLocker m1(current, Module_lock);
930 // Keep list of classes needing java.base module fixup
931 if (!ModuleEntryTable::javabase_defined()) {
932 assert(k->java_mirror() != nullptr, "Class's mirror is null");
933 k->class_loader_data()->inc_keep_alive();
934 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
935 fixup_module_field_list()->push(k);
936 } else {
937 javabase_was_defined = true;
938 }
939 }
940
941 // If java.base was already defined then patch this particular class with java.base.
942 if (javabase_was_defined) {
943 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
944 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr,
945 "Setting class module field, " JAVA_BASE_NAME " should be defined");
946 Handle javabase_handle(current, javabase_entry->module());
947 set_module(mirror(), javabase_handle());
948 }
949 } else {
950 assert(Universe::is_module_initialized() ||
951 (ModuleEntryTable::javabase_defined() &&
952 (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
953 "Incorrect java.lang.Module specification while creating mirror");
954 set_module(mirror(), module());
955 }
956 }
957
958 // Statically allocate fixup lists because they always get created.
959 void java_lang_Class::allocate_fixup_lists() {
960 GrowableArray<Klass*>* mirror_list =
961 new (mtClass) GrowableArray<Klass*>(40, mtClass);
962 set_fixup_mirror_list(mirror_list);
963
964 GrowableArray<Klass*>* module_list =
965 new (mtModule) GrowableArray<Klass*>(500, mtModule);
966 set_fixup_module_field_list(module_list);
967 }
968
969 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
970 Handle& mirror, Handle& comp_mirror, TRAPS) {
971 // Allocate mirror (java.lang.Class instance)
972 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
973 mirror = Handle(THREAD, mirror_oop);
974
975 // Setup indirection from mirror->klass
976 set_klass(mirror(), k);
977
978 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
979 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
980
981 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
982
983 // It might also have a component mirror. This mirror must already exist.
984 if (k->is_array_klass()) {
985 if (k->is_typeArray_klass()) {
986 BasicType type = TypeArrayKlass::cast(k)->element_type();
987 if (is_scratch) {
988 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
989 } else {
990 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
991 }
992 } else {
993 assert(k->is_objArray_klass(), "Must be");
994 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
995 assert(element_klass != nullptr, "Must have an element klass");
996 if (is_scratch) {
997 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
998 } else {
999 comp_mirror = Handle(THREAD, element_klass->java_mirror());
1000 }
1001 }
1002 assert(comp_mirror() != nullptr, "must have a mirror");
1003
1004 // Two-way link between the array klass and its component mirror:
1005 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1006 set_component_mirror(mirror(), comp_mirror());
1007 // See below for ordering dependencies between field array_klass in component mirror
1008 // and java_mirror in this klass.
1009 } else {
1010 assert(k->is_instance_klass(), "Must be");
1011
1012 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD);
1013 if (HAS_PENDING_EXCEPTION) {
1014 // If any of the fields throws an exception like OOM remove the klass field
1015 // from the mirror so GC doesn't follow it after the klass has been deallocated.
1016 // This mirror looks like a primitive type, which logically it is because it
1017 // it represents no class.
1018 set_klass(mirror(), nullptr);
1019 return;
1020 }
1021 }
1022 }
1023
1024 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1025 Handle module, Handle protection_domain,
1026 Handle classData, TRAPS) {
1027 assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1028 assert(k->java_mirror() == nullptr, "should only assign mirror once");
1029
1030 // Use this moment of initialization to cache modifier_flags also,
1031 // to support Class.getModifiers(). Instance classes recalculate
1032 // the cached flags after the class file is parsed, but before the
1033 // class is put into the system dictionary.
1034 int computed_modifiers = k->compute_modifier_flags();
1035 k->set_modifier_flags(computed_modifiers);
1036 // Class_klass has to be loaded because it is used to allocate
1037 // the mirror.
1038 if (vmClasses::Class_klass_loaded()) {
1039 Handle mirror;
1040 Handle comp_mirror;
1041
1042 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1043
1044 // set the classLoader field in the java_lang_Class instance
1045 assert(class_loader() == k->class_loader(), "should be same");
1046 set_class_loader(mirror(), class_loader());
1047
1048 // Setup indirection from klass->mirror
1049 // after any exceptions can happen during allocations.
1050 k->set_java_mirror(mirror);
1051
1052 // Set the module field in the java_lang_Class instance. This must be done
1053 // after the mirror is set.
1054 set_mirror_module_field(THREAD, k, mirror, module);
1055
1056 if (comp_mirror() != nullptr) {
1057 // Set after k->java_mirror() is published, because compiled code running
1058 // concurrently doesn't expect a k to have a null java_mirror.
1059 release_set_array_klass(comp_mirror(), k);
1060 }
1061 if (DumpSharedSpaces) {
1062 create_scratch_mirror(k, CHECK);
1063 }
1064 } else {
1065 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1066 fixup_mirror_list()->push(k);
1067 }
1068 }
1069
1070 #if INCLUDE_CDS_JAVA_HEAP
1071 // The "scratch mirror" stores the states of the mirror object that can be
1072 // decided at dump time (such as the initial values of the static fields, the
1073 // component mirror, etc). At runtime, more information is added to it by
1074 // java_lang_Class::restore_archived_mirror().
1075 //
1076 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1077 // produces the same result as /*runtime*/create_mirror().
1078 //
1079 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1080 // latter may contain dumptime-specific information that cannot be archived
1081 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1082 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1083 if (k->class_loader() != nullptr &&
1084 k->class_loader() != SystemDictionary::java_platform_loader() &&
1085 k->class_loader() != SystemDictionary::java_system_loader()) {
1086 // We only archive the mirrors of classes loaded by the built-in loaders
1087 return;
1088 }
1089
1090 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1091 Handle mirror;
1092 Handle comp_mirror;
1093 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1094
1095 if (comp_mirror() != nullptr) {
1096 release_set_array_klass(comp_mirror(), k);
1097 }
1098
1099 HeapShared::set_scratch_java_mirror(k, mirror());
1100 }
1101
1102 // Returns true if the mirror is updated, false if no archived mirror
1103 // data is present. After the archived mirror object is restored, the
1104 // shared klass' _has_raw_archived_mirror flag is cleared.
1105 bool java_lang_Class::restore_archived_mirror(Klass *k,
1106 Handle class_loader, Handle module,
1107 Handle protection_domain, TRAPS) {
1108 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1109 // see more details in vmClasses::resolve_all().
1110 if (!vmClasses::Class_klass_loaded()) {
1111 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1112 fixup_mirror_list()->push(k);
1113 return true;
1114 }
1115
1116 oop m = k->archived_java_mirror();
1117 assert(m != nullptr, "must have stored non-null archived mirror");
1118
1119 // Sanity: clear it now to prevent re-initialization if any of the following fails
1120 k->clear_archived_mirror_index();
1121
1122 // mirror is archived, restore
1123 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1124 if (ArchiveHeapLoader::is_mapped()) {
1125 assert(Universe::heap()->is_archived_object(m), "must be archived mirror object");
1126 }
1127 assert(as_Klass(m) == k, "must be");
1128 Handle mirror(THREAD, m);
1129
1130 if (!k->is_array_klass()) {
1131 // - local static final fields with initial values were initialized at dump time
1132
1133 if (protection_domain.not_null()) {
1134 set_protection_domain(mirror(), protection_domain());
1135 }
1136 }
1137
1138 assert(class_loader() == k->class_loader(), "should be same");
1139 if (class_loader.not_null()) {
1140 set_class_loader(mirror(), class_loader());
1141 }
1142
1143 k->set_java_mirror(mirror);
1144
1145 set_mirror_module_field(THREAD, k, mirror, module);
1146
1147 if (log_is_enabled(Trace, cds, heap, mirror)) {
1148 ResourceMark rm(THREAD);
1149 log_trace(cds, heap, mirror)(
1150 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1151 }
1152
1153 return true;
1154 }
1155 #endif // INCLUDE_CDS_JAVA_HEAP
1156
1157 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1158 assert(_module_offset != 0, "must have been computed already");
1159 set_module(k->java_mirror(), module());
1160 }
1161
1162 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1163 assert(_oop_size_offset != 0, "must be set");
1164 assert(size > 0, "Oop size must be greater than zero, not " SIZE_FORMAT, size);
1165 assert(size <= INT_MAX, "Lossy conversion: " SIZE_FORMAT, size);
1166 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1167 }
1168
1169 int java_lang_Class::static_oop_field_count(oop java_class) {
1170 assert(_static_oop_field_count_offset != 0, "must be set");
1171 return java_class->int_field(_static_oop_field_count_offset);
1172 }
1173
1174 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1175 assert(_static_oop_field_count_offset != 0, "must be set");
1176 java_class->int_field_put(_static_oop_field_count_offset, size);
1177 }
1178
1179 oop java_lang_Class::protection_domain(oop java_class) {
1180 assert(_protection_domain_offset != 0, "must be set");
1181 return java_class->obj_field(_protection_domain_offset);
1182 }
1183 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1184 assert(_protection_domain_offset != 0, "must be set");
1185 java_class->obj_field_put(_protection_domain_offset, pd);
1186 }
1187
1188 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1189 assert(_component_mirror_offset != 0, "must be set");
1190 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1191 }
1192 oop java_lang_Class::component_mirror(oop java_class) {
1193 assert(_component_mirror_offset != 0, "must be set");
1194 return java_class->obj_field(_component_mirror_offset);
1195 }
1196
1197 objArrayOop java_lang_Class::signers(oop java_class) {
1198 assert(_signers_offset != 0, "must be set");
1199 return (objArrayOop)java_class->obj_field(_signers_offset);
1200 }
1201 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1202 assert(_signers_offset != 0, "must be set");
1203 java_class->obj_field_put(_signers_offset, signers);
1204 }
1205
1206 oop java_lang_Class::class_data(oop java_class) {
1207 assert(_classData_offset != 0, "must be set");
1208 return java_class->obj_field(_classData_offset);
1209 }
1210 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1211 assert(_classData_offset != 0, "must be set");
1212 java_class->obj_field_put(_classData_offset, class_data);
1213 }
1214
1215 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1216 assert(_class_loader_offset != 0, "offsets should have been initialized");
1217 java_class->obj_field_put(_class_loader_offset, loader);
1218 }
1219
1220 oop java_lang_Class::class_loader(oop java_class) {
1221 assert(_class_loader_offset != 0, "must be set");
1222 return java_class->obj_field(_class_loader_offset);
1223 }
1224
1225 oop java_lang_Class::module(oop java_class) {
1226 assert(_module_offset != 0, "must be set");
1227 return java_class->obj_field(_module_offset);
1228 }
1229
1230 void java_lang_Class::set_module(oop java_class, oop module) {
1231 assert(_module_offset != 0, "must be set");
1232 java_class->obj_field_put(_module_offset, module);
1233 }
1234
1235 oop java_lang_Class::name(Handle java_class, TRAPS) {
1236 assert(_name_offset != 0, "must be set");
1237 oop o = java_class->obj_field(_name_offset);
1238 if (o == nullptr) {
1239 o = StringTable::intern(as_external_name(java_class()), THREAD);
1240 java_class->obj_field_put(_name_offset, o);
1241 }
1242 return o;
1243 }
1244
1245 oop java_lang_Class::source_file(oop java_class) {
1246 assert(_source_file_offset != 0, "must be set");
1247 return java_class->obj_field(_source_file_offset);
1248 }
1249
1250 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1251 assert(_source_file_offset != 0, "must be set");
1252 java_class->obj_field_put(_source_file_offset, source_file);
1253 }
1254
1255 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1256 // This should be improved by adding a field at the Java level or by
1257 // introducing a new VM klass (see comment in ClassFileParser)
1258 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1259 if (type != T_VOID) {
1260 Klass* aklass = Universe::typeArrayKlassObj(type);
1261 assert(aklass != nullptr, "correct bootstrap");
1262 release_set_array_klass(java_class, aklass);
1263 }
1264 #ifdef ASSERT
1265 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1266 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1267 #endif
1268 return java_class;
1269 }
1270
1271 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1272 assert(is_instance(java_class), "must be a Class object");
1273 java_class->metadata_field_put(_klass_offset, klass);
1274 }
1275
1276
1277 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1278 assert(is_instance(java_class), "must be a Class object");
1279 Symbol* name = nullptr;
1280 bool is_instance = false;
1281 if (is_primitive(java_class)) {
1282 name = vmSymbols::type_signature(primitive_type(java_class));
1283 } else {
1284 Klass* k = as_Klass(java_class);
1285 is_instance = k->is_instance_klass();
1286 name = k->name();
1287 }
1288 if (name == nullptr) {
1289 st->print("<null>");
1290 return;
1291 }
1292 if (is_instance) st->print("L");
1293 st->write((char*) name->base(), (int) name->utf8_length());
1294 if (is_instance) st->print(";");
1295 }
1296
1297 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1298 assert(is_instance(java_class), "must be a Class object");
1299 Symbol* name;
1300 if (is_primitive(java_class)) {
1301 name = vmSymbols::type_signature(primitive_type(java_class));
1302 // Because this can create a new symbol, the caller has to decrement
1303 // the refcount, so make adjustment here and below for symbols returned
1304 // that are not created or incremented due to a successful lookup.
1305 name->increment_refcount();
1306 } else {
1307 Klass* k = as_Klass(java_class);
1308 if (!k->is_instance_klass()) {
1309 name = k->name();
1310 name->increment_refcount();
1311 } else {
1312 ResourceMark rm;
1313 const char* sigstr = k->signature_name();
1314 int siglen = (int) strlen(sigstr);
1315 if (!intern_if_not_found) {
1316 name = SymbolTable::probe(sigstr, siglen);
1317 } else {
1318 name = SymbolTable::new_symbol(sigstr, siglen);
1319 }
1320 }
1321 }
1322 return name;
1323 }
1324
1325 // Returns the Java name for this Java mirror (Resource allocated)
1326 // See Klass::external_name().
1327 // For primitive type Java mirrors, its type name is returned.
1328 const char* java_lang_Class::as_external_name(oop java_class) {
1329 assert(is_instance(java_class), "must be a Class object");
1330 const char* name = nullptr;
1331 if (is_primitive(java_class)) {
1332 name = type2name(primitive_type(java_class));
1333 } else {
1334 name = as_Klass(java_class)->external_name();
1335 }
1336 if (name == nullptr) {
1337 name = "<null>";
1338 }
1339 return name;
1340 }
1341
1342 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1343 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1344 assert(k == nullptr || k->is_klass() && k->is_array_klass(), "should be array klass");
1345 return k;
1346 }
1347
1348
1349 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1350 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1351 java_class->release_metadata_field_put(_array_klass_offset, klass);
1352 }
1353
1354
1355 BasicType java_lang_Class::primitive_type(oop java_class) {
1356 assert(is_primitive(java_class), "just checking");
1357 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1358 BasicType type = T_VOID;
1359 if (ak != nullptr) {
1360 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1361 type = ArrayKlass::cast(ak)->element_type();
1362 } else {
1363 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1364 }
1365 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1366 return type;
1367 }
1368
1369 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1370 assert(is_instance(java_class), "must be a Class object");
1371 if (is_primitive(java_class)) {
1372 if (reference_klass != nullptr)
1373 (*reference_klass) = nullptr;
1374 return primitive_type(java_class);
1375 } else {
1376 if (reference_klass != nullptr)
1377 (*reference_klass) = as_Klass(java_class);
1378 return T_OBJECT;
1379 }
1380 }
1381
1382
1383 oop java_lang_Class::primitive_mirror(BasicType t) {
1384 oop mirror = Universe::java_mirror(t);
1385 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1386 assert(is_primitive(mirror), "must be primitive");
1387 return mirror;
1388 }
1389
1390 #define CLASS_FIELDS_DO(macro) \
1391 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1392 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1393 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1394 macro(_module_offset, k, "module", module_signature, false); \
1395 macro(_name_offset, k, "name", string_signature, false); \
1396 macro(_classData_offset, k, "classData", object_signature, false);
1397
1398 void java_lang_Class::compute_offsets() {
1399 if (_offsets_computed) {
1400 return;
1401 }
1402
1403 _offsets_computed = true;
1404
1405 InstanceKlass* k = vmClasses::Class_klass();
1406 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1407
1408 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1409 }
1410
1411 #if INCLUDE_CDS
1412 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1413 f->do_bool(&_offsets_computed);
1414
1415 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1416
1417 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1418 }
1419 #endif
1420
1421 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1422 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1423 return the_class_mirror->int_field(_classRedefinedCount_offset);
1424 }
1425
1426 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1427 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1428 the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1429 }
1430
1431
1432 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1433 // platform thread structure, and a eetop offset which was used for thread
1434 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1435 // merged, so in the HotSpot VM we just use the eetop field for the thread
1436 // instead of the privateInfo_offset.
1437 //
1438 // Note: The stackSize field is only present starting in 1.4.
1439
1440 int java_lang_Thread_FieldHolder::_group_offset;
1441 int java_lang_Thread_FieldHolder::_priority_offset;
1442 int java_lang_Thread_FieldHolder::_stackSize_offset;
1443 int java_lang_Thread_FieldHolder::_daemon_offset;
1444 int java_lang_Thread_FieldHolder::_thread_status_offset;
1445
1446 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1447 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1448 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1449 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1450 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1451 macro(_thread_status_offset, k, "threadStatus", int_signature, false)
1452
1453 void java_lang_Thread_FieldHolder::compute_offsets() {
1454 assert(_group_offset == 0, "offsets should be initialized only once");
1455
1456 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1457 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1458 }
1459
1460 #if INCLUDE_CDS
1461 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1462 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1463 }
1464 #endif
1465
1466 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1467 return holder->obj_field(_group_offset);
1468 }
1469
1470 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1471 return (ThreadPriority)holder->int_field(_priority_offset);
1472 }
1473
1474 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1475 holder->int_field_put(_priority_offset, priority);
1476 }
1477
1478 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1479 return holder->long_field(_stackSize_offset);
1480 }
1481
1482 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1483 return holder->bool_field(_daemon_offset) != 0;
1484 }
1485
1486 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1487 assert(val, "daemon status is never turned off");
1488 holder->bool_field_put(_daemon_offset, val);
1489 }
1490
1491 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1492 holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1493 }
1494
1495 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1496 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1497 }
1498
1499
1500 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1501
1502 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1503 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true);
1504
1505 void java_lang_Thread_Constants::compute_offsets() {
1506 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1507
1508 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1509 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1510 }
1511
1512 #if INCLUDE_CDS
1513 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1514 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1515 }
1516 #endif
1517
1518 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1519 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1520 oop base = k->static_field_base_raw();
1521 return base->obj_field(_static_VTHREAD_GROUP_offset);
1522 }
1523
1524
1525 int java_lang_Thread::_holder_offset;
1526 int java_lang_Thread::_name_offset;
1527 int java_lang_Thread::_contextClassLoader_offset;
1528 int java_lang_Thread::_inheritedAccessControlContext_offset;
1529 int java_lang_Thread::_eetop_offset;
1530 int java_lang_Thread::_jvmti_thread_state_offset;
1531 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1532 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1533 int java_lang_Thread::_interrupted_offset;
1534 int java_lang_Thread::_tid_offset;
1535 int java_lang_Thread::_continuation_offset;
1536 int java_lang_Thread::_park_blocker_offset;
1537 int java_lang_Thread::_scopedValueBindings_offset;
1538 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1539
1540 #define THREAD_FIELDS_DO(macro) \
1541 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \
1542 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1543 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1544 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1545 macro(_eetop_offset, k, "eetop", long_signature, false); \
1546 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1547 macro(_tid_offset, k, "tid", long_signature, false); \
1548 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1549 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1550 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1551
1552 void java_lang_Thread::compute_offsets() {
1553 assert(_holder_offset == 0, "offsets should be initialized only once");
1554
1555 InstanceKlass* k = vmClasses::Thread_klass();
1556 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1557 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1558 }
1559
1560 #if INCLUDE_CDS
1561 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1562 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1563 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1564 }
1565 #endif
1566
1567 JavaThread* java_lang_Thread::thread(oop java_thread) {
1568 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1569 }
1570
1571 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1572 java_thread->address_field_put(_eetop_offset, (address)thread);
1573 }
1574
1575 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1576 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1577 }
1578
1579 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1580 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1581 }
1582
1583 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1584 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1585 }
1586
1587 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1588 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1589 int val = VTMS_transition_disable_count(java_thread);
1590 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1591 }
1592
1593 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1594 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1595 int val = VTMS_transition_disable_count(java_thread);
1596 assert(val > 0, "VTMS_transition_disable_count should never be negative");
1597 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1598 }
1599
1600 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1601 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1602 }
1603
1604 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1605 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1606 }
1607
1608 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1609 assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1610 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1611 }
1612
1613 oop java_lang_Thread::holder(oop java_thread) {
1614 // Note: may return null if the thread is still attaching
1615 return java_thread->obj_field(_holder_offset);
1616 }
1617
1618 bool java_lang_Thread::interrupted(oop java_thread) {
1619 // Make sure the caller can safely access oops.
1620 assert(Thread::current()->is_VM_thread() ||
1621 (JavaThread::current()->thread_state() != _thread_blocked &&
1622 JavaThread::current()->thread_state() != _thread_in_native),
1623 "Unsafe access to oop");
1624 return java_thread->bool_field_volatile(_interrupted_offset);
1625 }
1626
1627 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1628 // Make sure the caller can safely access oops.
1629 assert(Thread::current()->is_VM_thread() ||
1630 (JavaThread::current()->thread_state() != _thread_blocked &&
1631 JavaThread::current()->thread_state() != _thread_in_native),
1632 "Unsafe access to oop");
1633 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1634 }
1635
1636
1637 oop java_lang_Thread::name(oop java_thread) {
1638 return java_thread->obj_field(_name_offset);
1639 }
1640
1641
1642 void java_lang_Thread::set_name(oop java_thread, oop name) {
1643 java_thread->obj_field_put(_name_offset, name);
1644 }
1645
1646 // Convenience macros for setting and getting Thread fields that
1647 // are actually stored in the FieldHolder object of the thread.
1648 // The FieldHolder can be null whilst a thread is attaching via
1649 // JNI, and when the main thread is attaching.
1650
1651 // The default value should be the default/zero initialized value
1652 // of the field as it would be in java.lang.Thread.FieldHolder.
1653 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \
1654 { \
1655 oop holder = java_lang_Thread::holder(java_thread); \
1656 if (holder != nullptr) \
1657 return java_lang_Thread_FieldHolder::field(holder); \
1658 else \
1659 return default_val; \
1660 }
1661
1662 // We should never be trying to set a field of an attaching thread.
1663 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \
1664 { \
1665 oop holder = java_lang_Thread::holder(java_thread); \
1666 assert(holder != nullptr, "Thread not fully initialized"); \
1667 java_lang_Thread_FieldHolder::set_##field(holder, value); \
1668 }
1669
1670
1671 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1672 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1673 }
1674
1675
1676 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1677 SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1678 }
1679
1680
1681 oop java_lang_Thread::threadGroup(oop java_thread) {
1682 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1683 }
1684
1685
1686 bool java_lang_Thread::is_alive(oop java_thread) {
1687 JavaThread* thr = java_lang_Thread::thread(java_thread);
1688 return (thr != nullptr);
1689 }
1690
1691
1692 bool java_lang_Thread::is_daemon(oop java_thread) {
1693 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1694 }
1695
1696
1697 void java_lang_Thread::set_daemon(oop java_thread) {
1698 SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1699 }
1700
1701 oop java_lang_Thread::context_class_loader(oop java_thread) {
1702 return java_thread->obj_field(_contextClassLoader_offset);
1703 }
1704
1705 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1706 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1707 }
1708
1709
1710 jlong java_lang_Thread::stackSize(oop java_thread) {
1711 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1712 }
1713
1714 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1715 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1716 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1717 }
1718
1719 // Read thread status value from threadStatus field in java.lang.Thread java class.
1720 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1721 // Make sure the caller is operating on behalf of the VM or is
1722 // running VM code (state == _thread_in_vm).
1723 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1724 JavaThread::current()->thread_state() == _thread_in_vm,
1725 "Java Thread is not running in vm");
1726 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1727 }
1728
1729 ByteSize java_lang_Thread::thread_id_offset() {
1730 return in_ByteSize(_tid_offset);
1731 }
1732
1733 oop java_lang_Thread::park_blocker(oop java_thread) {
1734 return java_thread->obj_field(_park_blocker_offset);
1735 }
1736
1737 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) {
1738 ThreadsListHandle tlh(JavaThread::current());
1739 JavaThread* thread;
1740 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread);
1741 if (is_virtual) {
1742 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread);
1743 if (carrier_thread == nullptr) {
1744 return nullptr;
1745 }
1746 thread = java_lang_Thread::thread(carrier_thread);
1747 } else {
1748 thread = java_lang_Thread::thread(java_thread);
1749 }
1750 if (thread == nullptr) {
1751 return nullptr;
1752 }
1753
1754 class GetStackTraceClosure : public HandshakeClosure {
1755 public:
1756 const Handle _java_thread;
1757 int _depth;
1758 bool _retry_handshake;
1759 GrowableArray<Method*>* _methods;
1760 GrowableArray<int>* _bcis;
1761
1762 GetStackTraceClosure(Handle java_thread) :
1763 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false),
1764 _methods(nullptr), _bcis(nullptr) {
1765 }
1766 ~GetStackTraceClosure() {
1767 delete _methods;
1768 delete _bcis;
1769 }
1770
1771 bool read_reset_retry() {
1772 bool ret = _retry_handshake;
1773 // If we re-execute the handshake this method need to return false
1774 // when the handshake cannot be performed. (E.g. thread terminating)
1775 _retry_handshake = false;
1776 return ret;
1777 }
1778
1779 void do_thread(Thread* th) {
1780 if (!Thread::current()->is_Java_thread()) {
1781 _retry_handshake = true;
1782 return;
1783 }
1784
1785 JavaThread* thread = JavaThread::cast(th);
1786
1787 if (!thread->has_last_Java_frame()) {
1788 return;
1789 }
1790
1791 bool carrier = false;
1792 if (java_lang_VirtualThread::is_instance(_java_thread())) {
1793 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
1794 const ContinuationEntry* ce = thread->vthread_continuation();
1795 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) {
1796 return; // not mounted
1797 }
1798 } else {
1799 carrier = (thread->vthread_continuation() != nullptr);
1800 }
1801
1802 const int max_depth = MaxJavaStackTraceDepth;
1803 const bool skip_hidden = !ShowHiddenFrames;
1804
1805 // Pick minimum length that will cover most cases
1806 int init_length = 64;
1807 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1808 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
1809
1810 int total_count = 0;
1811 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops
1812 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
1813 vfst.next()) {
1814
1815 if (skip_hidden && (vfst.method()->is_hidden() ||
1816 vfst.method()->is_continuation_enter_intrinsic())) {
1817 continue;
1818 }
1819
1820 _methods->push(vfst.method());
1821 _bcis->push(vfst.bci());
1822 total_count++;
1823 }
1824
1825 _depth = total_count;
1826 }
1827 };
1828
1829 // Handshake with target
1830 ResourceMark rm(THREAD);
1831 HandleMark hm(THREAD);
1832 GetStackTraceClosure gstc(Handle(THREAD, java_thread));
1833 do {
1834 Handshake::execute(&gstc, &tlh, thread);
1835 } while (gstc.read_reset_retry());
1836
1837 // Stop if no stack trace is found.
1838 if (gstc._depth == 0) {
1839 return nullptr;
1840 }
1841
1842 // Convert to StackTraceElement array
1843 InstanceKlass* k = vmClasses::StackTraceElement_klass();
1844 assert(k != nullptr, "must be loaded in 1.4+");
1845 if (k->should_be_initialized()) {
1846 k->initialize(CHECK_NULL);
1847 }
1848 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL);
1849
1850 for (int i = 0; i < gstc._depth; i++) {
1851 methodHandle method(THREAD, gstc._methods->at(i));
1852 oop element = java_lang_StackTraceElement::create(method,
1853 gstc._bcis->at(i),
1854 CHECK_NULL);
1855 trace->obj_at_put(i, element);
1856 }
1857
1858 return trace();
1859 }
1860
1861 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1862 JavaThreadStatus status = get_thread_status(java_thread);
1863 switch (status) {
1864 case JavaThreadStatus::NEW : return "NEW";
1865 case JavaThreadStatus::RUNNABLE : return "RUNNABLE";
1866 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)";
1867 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1868 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1869 case JavaThreadStatus::PARKED : return "WAITING (parking)";
1870 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)";
1871 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1872 case JavaThreadStatus::TERMINATED : return "TERMINATED";
1873 default : return "UNKNOWN";
1874 };
1875 }
1876 int java_lang_ThreadGroup::_parent_offset;
1877 int java_lang_ThreadGroup::_name_offset;
1878 int java_lang_ThreadGroup::_maxPriority_offset;
1879 int java_lang_ThreadGroup::_daemon_offset;
1880
1881 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1882 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1883 return java_thread_group->obj_field(_parent_offset);
1884 }
1885
1886 // ("name as oop" accessor is not necessary)
1887
1888 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1889 oop name = java_thread_group->obj_field(_name_offset);
1890 // ThreadGroup.name can be null
1891 if (name != nullptr) {
1892 return java_lang_String::as_utf8_string(name);
1893 }
1894 return nullptr;
1895 }
1896
1897 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1898 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1899 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1900 }
1901
1902 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1903 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1904 return java_thread_group->bool_field(_daemon_offset) != 0;
1905 }
1906
1907 #define THREADGROUP_FIELDS_DO(macro) \
1908 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1909 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1910 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1911 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false);
1912
1913 void java_lang_ThreadGroup::compute_offsets() {
1914 assert(_parent_offset == 0, "offsets should be initialized only once");
1915
1916 InstanceKlass* k = vmClasses::ThreadGroup_klass();
1917 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1918 }
1919
1920 #if INCLUDE_CDS
1921 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1922 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1923 }
1924 #endif
1925
1926
1927 // java_lang_VirtualThread
1928
1929 int java_lang_VirtualThread::static_vthread_scope_offset;
1930 int java_lang_VirtualThread::_carrierThread_offset;
1931 int java_lang_VirtualThread::_continuation_offset;
1932 int java_lang_VirtualThread::_state_offset;
1933
1934 #define VTHREAD_FIELDS_DO(macro) \
1935 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \
1936 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \
1937 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1938 macro(_state_offset, k, "state", int_signature, false)
1939
1940
1941 void java_lang_VirtualThread::compute_offsets() {
1942 InstanceKlass* k = vmClasses::VirtualThread_klass();
1943 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1944 }
1945
1946 bool java_lang_VirtualThread::is_instance(oop obj) {
1947 return obj != nullptr && is_subclass(obj->klass());
1948 }
1949
1950 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
1951 oop thread = vthread->obj_field(_carrierThread_offset);
1952 return thread;
1953 }
1954
1955 oop java_lang_VirtualThread::continuation(oop vthread) {
1956 oop cont = vthread->obj_field(_continuation_offset);
1957 return cont;
1958 }
1959
1960 int java_lang_VirtualThread::state(oop vthread) {
1961 return vthread->int_field_acquire(_state_offset);
1962 }
1963
1964 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
1965 JavaThreadStatus status = JavaThreadStatus::NEW;
1966 switch (state) {
1967 case NEW :
1968 status = JavaThreadStatus::NEW;
1969 break;
1970 case STARTED :
1971 case RUNNABLE :
1972 case RUNNABLE_SUSPENDED :
1973 case RUNNING :
1974 case PARKING :
1975 case YIELDING :
1976 status = JavaThreadStatus::RUNNABLE;
1977 break;
1978 case PARKED :
1979 case PARKED_SUSPENDED :
1980 case PINNED :
1981 status = JavaThreadStatus::PARKED;
1982 break;
1983 case TERMINATED :
1984 status = JavaThreadStatus::TERMINATED;
1985 break;
1986 default:
1987 ShouldNotReachHere();
1988 }
1989 return status;
1990 }
1991
1992 #if INCLUDE_CDS
1993 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
1994 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1995 }
1996 #endif
1997
1998 // java_lang_Throwable
1999
2000 int java_lang_Throwable::_backtrace_offset;
2001 int java_lang_Throwable::_detailMessage_offset;
2002 int java_lang_Throwable::_stackTrace_offset;
2003 int java_lang_Throwable::_depth_offset;
2004 int java_lang_Throwable::_cause_offset;
2005 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2006
2007 #define THROWABLE_FIELDS_DO(macro) \
2008 macro(_backtrace_offset, k, "backtrace", object_signature, false); \
2009 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \
2010 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2011 macro(_depth_offset, k, "depth", int_signature, false); \
2012 macro(_cause_offset, k, "cause", throwable_signature, false); \
2013 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2014
2015 void java_lang_Throwable::compute_offsets() {
2016 InstanceKlass* k = vmClasses::Throwable_klass();
2017 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2018 }
2019
2020 #if INCLUDE_CDS
2021 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2022 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2023 }
2024 #endif
2025
2026 oop java_lang_Throwable::unassigned_stacktrace() {
2027 InstanceKlass* ik = vmClasses::Throwable_klass();
2028 oop base = ik->static_field_base_raw();
2029 return base->obj_field(_static_unassigned_stacktrace_offset);
2030 }
2031
2032 oop java_lang_Throwable::backtrace(oop throwable) {
2033 return throwable->obj_field_acquire(_backtrace_offset);
2034 }
2035
2036
2037 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2038 throwable->release_obj_field_put(_backtrace_offset, value);
2039 }
2040
2041 int java_lang_Throwable::depth(oop throwable) {
2042 return throwable->int_field(_depth_offset);
2043 }
2044
2045 void java_lang_Throwable::set_depth(oop throwable, int value) {
2046 throwable->int_field_put(_depth_offset, value);
2047 }
2048
2049 oop java_lang_Throwable::message(oop throwable) {
2050 return throwable->obj_field(_detailMessage_offset);
2051 }
2052
2053 oop java_lang_Throwable::cause(oop throwable) {
2054 return throwable->obj_field(_cause_offset);
2055 }
2056
2057 // Return Symbol for detailed_message or null
2058 Symbol* java_lang_Throwable::detail_message(oop throwable) {
2059 PreserveExceptionMark pm(Thread::current());
2060 oop detailed_message = java_lang_Throwable::message(throwable);
2061 if (detailed_message != nullptr) {
2062 return java_lang_String::as_symbol(detailed_message);
2063 }
2064 return nullptr;
2065 }
2066
2067 void java_lang_Throwable::set_message(oop throwable, oop value) {
2068 throwable->obj_field_put(_detailMessage_offset, value);
2069 }
2070
2071
2072 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2073 throwable->obj_field_put(_stackTrace_offset, st_element_array);
2074 }
2075
2076 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2077 set_stacktrace(throwable, nullptr);
2078 }
2079
2080
2081 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2082 ResourceMark rm;
2083 Klass* k = throwable->klass();
2084 assert(k != nullptr, "just checking");
2085 st->print("%s", k->external_name());
2086 oop msg = message(throwable);
2087 if (msg != nullptr) {
2088 st->print(": %s", java_lang_String::as_utf8_string(msg));
2089 }
2090 }
2091
2092 // After this many redefines, the stack trace is unreliable.
2093 const int MAX_VERSION = USHRT_MAX;
2094
2095 static inline bool version_matches(Method* method, int version) {
2096 assert(version < MAX_VERSION, "version is too big");
2097 return method != nullptr && (method->constants()->version() == version);
2098 }
2099
2100 // This class provides a simple wrapper over the internal structure of
2101 // exception backtrace to insulate users of the backtrace from needing
2102 // to know what it looks like.
2103 // The code of this class is not GC safe. Allocations can only happen
2104 // in expand().
2105 class BacktraceBuilder: public StackObj {
2106 friend class BacktraceIterator;
2107 private:
2108 Handle _backtrace;
2109 objArrayOop _head;
2110 typeArrayOop _methods;
2111 typeArrayOop _bcis;
2112 objArrayOop _mirrors;
2113 typeArrayOop _names; // Needed to insulate method name against redefinition.
2114 // True if the top frame of the backtrace is omitted because it shall be hidden.
2115 bool _has_hidden_top_frame;
2116 int _index;
2117 NoSafepointVerifier _nsv;
2118
2119 enum {
2120 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2121 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2122 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2123 trace_names_offset = java_lang_Throwable::trace_names_offset,
2124 trace_conts_offset = java_lang_Throwable::trace_conts_offset,
2125 trace_next_offset = java_lang_Throwable::trace_next_offset,
2126 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2127 trace_size = java_lang_Throwable::trace_size,
2128 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2129 };
2130
2131 // get info out of chunks
2132 static typeArrayOop get_methods(objArrayHandle chunk) {
2133 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2134 assert(methods != nullptr, "method array should be initialized in backtrace");
2135 return methods;
2136 }
2137 static typeArrayOop get_bcis(objArrayHandle chunk) {
2138 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2139 assert(bcis != nullptr, "bci array should be initialized in backtrace");
2140 return bcis;
2141 }
2142 static objArrayOop get_mirrors(objArrayHandle chunk) {
2143 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2144 assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2145 return mirrors;
2146 }
2147 static typeArrayOop get_names(objArrayHandle chunk) {
2148 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2149 assert(names != nullptr, "names array should be initialized in backtrace");
2150 return names;
2151 }
2152 static bool has_hidden_top_frame(objArrayHandle chunk) {
2153 oop hidden = chunk->obj_at(trace_hidden_offset);
2154 return hidden != nullptr;
2155 }
2156
2157 public:
2158
2159 // constructor for new backtrace
2160 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2161 expand(CHECK);
2162 _backtrace = Handle(THREAD, _head);
2163 _index = 0;
2164 }
2165
2166 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2167 _methods = get_methods(backtrace);
2168 _bcis = get_bcis(backtrace);
2169 _mirrors = get_mirrors(backtrace);
2170 _names = get_names(backtrace);
2171 _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2172 assert(_methods->length() == _bcis->length() &&
2173 _methods->length() == _mirrors->length() &&
2174 _mirrors->length() == _names->length(),
2175 "method and source information arrays should match");
2176
2177 // head is the preallocated backtrace
2178 _head = backtrace();
2179 _backtrace = Handle(thread, _head);
2180 _index = 0;
2181 }
2182
2183 void expand(TRAPS) {
2184 objArrayHandle old_head(THREAD, _head);
2185 PauseNoSafepointVerifier pnsv(&_nsv);
2186
2187 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2188 objArrayHandle new_head(THREAD, head);
2189
2190 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2191 typeArrayHandle new_methods(THREAD, methods);
2192
2193 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2194 typeArrayHandle new_bcis(THREAD, bcis);
2195
2196 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2197 objArrayHandle new_mirrors(THREAD, mirrors);
2198
2199 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2200 typeArrayHandle new_names(THREAD, names);
2201
2202 if (!old_head.is_null()) {
2203 old_head->obj_at_put(trace_next_offset, new_head());
2204 }
2205 new_head->obj_at_put(trace_methods_offset, new_methods());
2206 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2207 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2208 new_head->obj_at_put(trace_names_offset, new_names());
2209 new_head->obj_at_put(trace_hidden_offset, nullptr);
2210
2211 _head = new_head();
2212 _methods = new_methods();
2213 _bcis = new_bcis();
2214 _mirrors = new_mirrors();
2215 _names = new_names();
2216 _index = 0;
2217 }
2218
2219 oop backtrace() {
2220 return _backtrace();
2221 }
2222
2223 inline void push(Method* method, int bci, TRAPS) {
2224 // Smear the -1 bci to 0 since the array only holds unsigned
2225 // shorts. The later line number lookup would just smear the -1
2226 // to a 0 even if it could be recorded.
2227 if (bci == SynchronizationEntryBCI) bci = 0;
2228
2229 if (_index >= trace_chunk_size) {
2230 methodHandle mhandle(THREAD, method);
2231 expand(CHECK);
2232 method = mhandle();
2233 }
2234
2235 _methods->ushort_at_put(_index, method->orig_method_idnum());
2236 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2237
2238 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2239 // klass owning the symbols alive so their refcounts aren't decremented.
2240 Symbol* name = method->name();
2241 _names->symbol_at_put(_index, name);
2242
2243 // We need to save the mirrors in the backtrace to keep the class
2244 // from being unloaded while we still have this stack trace.
2245 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2246 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2247
2248 _index++;
2249 }
2250
2251 void set_has_hidden_top_frame() {
2252 if (!_has_hidden_top_frame) {
2253 // It would be nice to add java/lang/Boolean::TRUE here
2254 // to indicate that this backtrace has a hidden top frame.
2255 // But this code is used before TRUE is allocated.
2256 // Therefore let's just use an arbitrary legal oop
2257 // available right here. _methods is a short[].
2258 assert(_methods != nullptr, "we need a legal oop");
2259 _has_hidden_top_frame = true;
2260 _head->obj_at_put(trace_hidden_offset, _methods);
2261 }
2262 }
2263 };
2264
2265 struct BacktraceElement : public StackObj {
2266 int _method_id;
2267 int _bci;
2268 int _version;
2269 Symbol* _name;
2270 Handle _mirror;
2271 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2272 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2273 };
2274
2275 class BacktraceIterator : public StackObj {
2276 int _index;
2277 objArrayHandle _result;
2278 objArrayHandle _mirrors;
2279 typeArrayHandle _methods;
2280 typeArrayHandle _bcis;
2281 typeArrayHandle _names;
2282
2283 void init(objArrayHandle result, Thread* thread) {
2284 // Get method id, bci, version and mirror from chunk
2285 _result = result;
2286 if (_result.not_null()) {
2287 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2288 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2289 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2290 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2291 _index = 0;
2292 }
2293 }
2294 public:
2295 BacktraceIterator(objArrayHandle result, Thread* thread) {
2296 init(result, thread);
2297 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2298 }
2299
2300 BacktraceElement next(Thread* thread) {
2301 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2302 _methods->ushort_at(_index),
2303 Backtrace::version_at(_bcis->int_at(_index)),
2304 Backtrace::bci_at(_bcis->int_at(_index)),
2305 _names->symbol_at(_index));
2306 _index++;
2307
2308 if (_index >= java_lang_Throwable::trace_chunk_size) {
2309 int next_offset = java_lang_Throwable::trace_next_offset;
2310 // Get next chunk
2311 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2312 init(result, thread);
2313 }
2314 return e;
2315 }
2316
2317 bool repeat() {
2318 return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2319 }
2320 };
2321
2322
2323 // Print stack trace element to resource allocated buffer
2324 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2325 int version, int bci, Symbol* name) {
2326 ResourceMark rm;
2327
2328 // Get strings and string lengths
2329 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2330 const char* klass_name = holder->external_name();
2331 int buf_len = (int)strlen(klass_name);
2332
2333 char* method_name = name->as_C_string();
2334 buf_len += (int)strlen(method_name);
2335
2336 char* source_file_name = nullptr;
2337 Symbol* source = Backtrace::get_source_file_name(holder, version);
2338 if (source != nullptr) {
2339 source_file_name = source->as_C_string();
2340 buf_len += (int)strlen(source_file_name);
2341 }
2342
2343 char *module_name = nullptr, *module_version = nullptr;
2344 ModuleEntry* module = holder->module();
2345 if (module->is_named()) {
2346 module_name = module->name()->as_C_string();
2347 buf_len += (int)strlen(module_name);
2348 if (module->version() != nullptr) {
2349 module_version = module->version()->as_C_string();
2350 buf_len += (int)strlen(module_version);
2351 }
2352 }
2353
2354 // Allocate temporary buffer with extra space for formatting and line number
2355 const size_t buf_size = buf_len + 64;
2356 char* buf = NEW_RESOURCE_ARRAY(char, buf_size);
2357
2358 // Print stack trace line in buffer
2359 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name);
2360
2361 // Print module information
2362 if (module_name != nullptr) {
2363 if (module_version != nullptr) {
2364 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version);
2365 } else {
2366 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name);
2367 }
2368 }
2369
2370 // The method can be null if the requested class version is gone
2371 Method* method = holder->method_with_orig_idnum(method_id, version);
2372 if (!version_matches(method, version)) {
2373 strcat(buf, "Redefined)");
2374 } else {
2375 int line_number = Backtrace::get_line_number(method, bci);
2376 if (line_number == -2) {
2377 strcat(buf, "Native Method)");
2378 } else {
2379 if (source_file_name != nullptr && (line_number != -1)) {
2380 // Sourcename and linenumber
2381 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number);
2382 } else if (source_file_name != nullptr) {
2383 // Just sourcename
2384 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name);
2385 } else {
2386 // Neither sourcename nor linenumber
2387 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)");
2388 }
2389 CompiledMethod* nm = method->code();
2390 if (WizardMode && nm != nullptr) {
2391 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2392 }
2393 }
2394 }
2395
2396 st->print_cr("%s", buf);
2397 }
2398
2399 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2400 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2401 int method_id = method->orig_method_idnum();
2402 int version = method->constants()->version();
2403 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2404 }
2405
2406 /**
2407 * Print the throwable message and its stack trace plus all causes by walking the
2408 * cause chain. The output looks the same as of Throwable.printStackTrace().
2409 */
2410 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2411 // First, print the message.
2412 print(throwable(), st);
2413 st->cr();
2414
2415 // Now print the stack trace.
2416 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2417 while (throwable.not_null()) {
2418 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2419 if (result.is_null()) {
2420 st->print_raw_cr("\t<<no stack trace available>>");
2421 return;
2422 }
2423 BacktraceIterator iter(result, THREAD);
2424
2425 while (iter.repeat()) {
2426 BacktraceElement bte = iter.next(THREAD);
2427 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2428 }
2429 {
2430 // Call getCause() which doesn't necessarily return the _cause field.
2431 ExceptionMark em(THREAD);
2432 JavaValue cause(T_OBJECT);
2433 JavaCalls::call_virtual(&cause,
2434 throwable,
2435 throwable->klass(),
2436 vmSymbols::getCause_name(),
2437 vmSymbols::void_throwable_signature(),
2438 THREAD);
2439 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2440 if (HAS_PENDING_EXCEPTION) {
2441 CLEAR_PENDING_EXCEPTION;
2442 throwable = Handle();
2443 } else {
2444 throwable = Handle(THREAD, cause.get_oop());
2445 if (throwable.not_null()) {
2446 st->print("Caused by: ");
2447 print(throwable(), st);
2448 st->cr();
2449 }
2450 }
2451 }
2452 }
2453 }
2454
2455 /**
2456 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2457 */
2458 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2459 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2460 JavaValue result(T_VOID);
2461 JavaCalls::call_virtual(&result,
2462 throwable,
2463 vmClasses::Throwable_klass(),
2464 vmSymbols::printStackTrace_name(),
2465 vmSymbols::void_method_signature(),
2466 THREAD);
2467 }
2468
2469 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2470 if (!StackTraceInThrowable) return;
2471 ResourceMark rm(THREAD);
2472
2473 // Start out by clearing the backtrace for this object, in case the VM
2474 // runs out of memory while allocating the stack trace
2475 set_backtrace(throwable(), nullptr);
2476 // Clear lazily constructed Java level stacktrace if refilling occurs
2477 // This is unnecessary in 1.7+ but harmless
2478 clear_stacktrace(throwable());
2479
2480 int max_depth = MaxJavaStackTraceDepth;
2481 JavaThread* thread = THREAD;
2482
2483 BacktraceBuilder bt(CHECK);
2484
2485 // If there is no Java frame just return the method that was being called
2486 // with bci 0
2487 if (!thread->has_last_Java_frame()) {
2488 if (max_depth >= 1 && method() != nullptr) {
2489 bt.push(method(), 0, CHECK);
2490 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2491 set_depth(throwable(), 1);
2492 set_backtrace(throwable(), bt.backtrace());
2493 }
2494 return;
2495 }
2496
2497 // Instead of using vframe directly, this version of fill_in_stack_trace
2498 // basically handles everything by hand. This significantly improved the
2499 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2500 // See bug 6333838 for more details.
2501 // The "ASSERT" here is to verify this method generates the exactly same stack
2502 // trace as utilizing vframe.
2503 #ifdef ASSERT
2504 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2505 #endif
2506 int total_count = 0;
2507 RegisterMap map(thread,
2508 RegisterMap::UpdateMap::skip,
2509 RegisterMap::ProcessFrames::skip,
2510 RegisterMap::WalkContinuation::include);
2511 int decode_offset = 0;
2512 CompiledMethod* nm = nullptr;
2513 bool skip_fillInStackTrace_check = false;
2514 bool skip_throwableInit_check = false;
2515 bool skip_hidden = !ShowHiddenFrames;
2516 bool show_carrier = ShowCarrierFrames;
2517 ContinuationEntry* cont_entry = thread->last_continuation();
2518 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2519 Method* method = nullptr;
2520 int bci = 0;
2521
2522 // Compiled java method case.
2523 if (decode_offset != 0) {
2524 DebugInfoReadStream stream(nm, decode_offset);
2525 decode_offset = stream.read_int();
2526 method = (Method*)nm->metadata_at(stream.read_int());
2527 bci = stream.read_bci();
2528 } else {
2529 if (fr.is_first_frame()) break;
2530
2531 if (Continuation::is_continuation_enterSpecial(fr)) {
2532 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2533 if (!show_carrier && cont_entry->is_virtual_thread()) {
2534 break;
2535 }
2536 cont_entry = cont_entry->parent();
2537 }
2538
2539 address pc = fr.pc();
2540 if (fr.is_interpreted_frame()) {
2541 address bcp;
2542 if (!map.in_cont()) {
2543 bcp = fr.interpreter_frame_bcp();
2544 method = fr.interpreter_frame_method();
2545 } else {
2546 bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2547 method = map.stack_chunk()->interpreter_frame_method(fr);
2548 }
2549 bci = method->bci_from(bcp);
2550 fr = fr.sender(&map);
2551 } else {
2552 CodeBlob* cb = fr.cb();
2553 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2554 // but non nmethod
2555 fr = fr.sender(&map);
2556 if (cb == nullptr || !cb->is_compiled()) {
2557 continue;
2558 }
2559 nm = cb->as_compiled_method();
2560 assert(nm->method() != nullptr, "must be");
2561 if (nm->method()->is_native()) {
2562 method = nm->method();
2563 bci = 0;
2564 } else {
2565 PcDesc* pd = nm->pc_desc_at(pc);
2566 decode_offset = pd->scope_decode_offset();
2567 // if decode_offset is not equal to 0, it will execute the
2568 // "compiled java method case" at the beginning of the loop.
2569 continue;
2570 }
2571 }
2572 }
2573 #ifdef ASSERT
2574 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2575 assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2576 st.next();
2577 }
2578 #endif
2579
2580 // the format of the stacktrace will be:
2581 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2582 // - 0 or more <init> methods for the exception class (skipped)
2583 // - rest of the stack
2584
2585 if (!skip_fillInStackTrace_check) {
2586 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2587 throwable->is_a(method->method_holder())) {
2588 continue;
2589 }
2590 else {
2591 skip_fillInStackTrace_check = true; // gone past them all
2592 }
2593 }
2594 if (!skip_throwableInit_check) {
2595 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2596
2597 // skip <init> methods of the exception class and superclasses
2598 // This is similar to classic VM.
2599 if (method->name() == vmSymbols::object_initializer_name() &&
2600 throwable->is_a(method->method_holder())) {
2601 continue;
2602 } else {
2603 // there are none or we've seen them all - either way stop checking
2604 skip_throwableInit_check = true;
2605 }
2606 }
2607 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2608 if (skip_hidden) {
2609 if (total_count == 0) {
2610 // The top frame will be hidden from the stack trace.
2611 bt.set_has_hidden_top_frame();
2612 }
2613 continue;
2614 }
2615 }
2616
2617 bt.push(method, bci, CHECK);
2618 total_count++;
2619 }
2620
2621 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2622
2623 // Put completed stack trace into throwable object
2624 set_backtrace(throwable(), bt.backtrace());
2625 set_depth(throwable(), total_count);
2626 }
2627
2628 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2629 // No-op if stack trace is disabled
2630 if (!StackTraceInThrowable) {
2631 return;
2632 }
2633
2634 // Disable stack traces for some preallocated out of memory errors
2635 if (!Universe::should_fill_in_stack_trace(throwable)) {
2636 return;
2637 }
2638
2639 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2640 PreserveExceptionMark pm(THREAD);
2641
2642 fill_in_stack_trace(throwable, method, THREAD);
2643 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2644 // original exception via the PreserveExceptionMark destructor.
2645 CLEAR_PENDING_EXCEPTION;
2646 }
2647
2648 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2649 // Allocate stack trace - backtrace is created but not filled in
2650
2651 // No-op if stack trace is disabled
2652 if (!StackTraceInThrowable) return;
2653 BacktraceBuilder bt(CHECK); // creates a backtrace
2654 set_backtrace(throwable(), bt.backtrace());
2655 }
2656
2657
2658 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2659 // Fill in stack trace into preallocated backtrace (no GC)
2660
2661 // No-op if stack trace is disabled
2662 if (!StackTraceInThrowable) return;
2663
2664 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2665
2666 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2667
2668 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2669 assert(backtrace.not_null(), "backtrace should have been preallocated");
2670
2671 ResourceMark rm(THREAD);
2672 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2673
2674 BacktraceBuilder bt(THREAD, backtrace);
2675
2676 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2677 // methods as preallocated errors aren't created by "java" code.
2678
2679 // fill in as much stack trace as possible
2680 int chunk_count = 0;
2681 for (;!st.at_end(); st.next()) {
2682 bt.push(st.method(), st.bci(), CHECK);
2683 chunk_count++;
2684
2685 // Bail-out for deep stacks
2686 if (chunk_count >= trace_chunk_size) break;
2687 }
2688 set_depth(throwable(), chunk_count);
2689 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2690
2691 // We support the Throwable immutability protocol defined for Java 7.
2692 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2693 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2694 }
2695
2696 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2697 objArrayHandle stack_trace_array_h, TRAPS) {
2698
2699 if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2700 THROW(vmSymbols::java_lang_NullPointerException());
2701 }
2702
2703 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2704
2705 if (stack_trace_array_h->length() != depth) {
2706 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2707 }
2708
2709 objArrayHandle result(THREAD, objArrayOop(backtrace()));
2710 BacktraceIterator iter(result, THREAD);
2711
2712 int index = 0;
2713 while (iter.repeat()) {
2714 BacktraceElement bte = iter.next(THREAD);
2715
2716 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2717
2718 if (stack_trace_element.is_null()) {
2719 THROW(vmSymbols::java_lang_NullPointerException());
2720 }
2721
2722 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2723 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2724
2725 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2726 method,
2727 bte._version,
2728 bte._bci,
2729 bte._name,
2730 CHECK);
2731 }
2732 }
2733
2734 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
2735 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
2736 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
2737 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
2738 // symbolic stacktrace of 'throwable'.
2739 assert(throwable.not_null(), "shouldn't be");
2740
2741 // Now create the message from the original exception and thread name.
2742 Symbol* message = java_lang_Throwable::detail_message(throwable());
2743 ResourceMark rm(current);
2744 stringStream st;
2745 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
2746 message == nullptr ? "" : ":");
2747 if (message == nullptr) {
2748 st.print("[in thread \"%s\"]", current->name());
2749 } else {
2750 st.print("%s [in thread \"%s\"]", message->as_C_string(), current->name());
2751 }
2752
2753 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
2754 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
2755 // If new_exception returns a different exception while creating the exception,
2756 // abandon the attempt to save the initialization error and return null.
2757 if (init_error->klass()->name() != exception_name) {
2758 log_info(class, init)("Exception thrown while saving initialization exception %s",
2759 init_error->klass()->external_name());
2760 return Handle();
2761 }
2762
2763 // Call to java to fill in the stack trace and clear declaringClassObject to
2764 // not keep classes alive in the stack trace.
2765 // call this: public StackTraceElement[] getStackTrace()
2766 JavaValue result(T_ARRAY);
2767 JavaCalls::call_virtual(&result, throwable,
2768 vmClasses::Throwable_klass(),
2769 vmSymbols::getStackTrace_name(),
2770 vmSymbols::getStackTrace_signature(),
2771 current);
2772 if (!current->has_pending_exception()){
2773 Handle stack_trace(current, result.get_oop());
2774 assert(stack_trace->is_objArray(), "Should be an array");
2775 java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
2776 // Clear backtrace because the stacktrace should be used instead.
2777 set_backtrace(init_error(), nullptr);
2778 } else {
2779 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
2780 init_error->klass()->external_name());
2781 current->clear_pending_exception();
2782 }
2783
2784 return init_error;
2785 }
2786
2787 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
2788 JavaThread* current = JavaThread::current();
2789 objArrayHandle result(current, objArrayOop(backtrace(throwable)));
2790 BacktraceIterator iter(result, current);
2791 // No backtrace available.
2792 if (!iter.repeat()) return false;
2793
2794 // If the exception happened in a frame that has been hidden, i.e.,
2795 // omitted from the back trace, we can not compute the message.
2796 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
2797 if (hidden != nullptr) {
2798 return false;
2799 }
2800
2801 // Get first backtrace element.
2802 BacktraceElement bte = iter.next(current);
2803
2804 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2805 assert(holder != nullptr, "first element should be non-null");
2806 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
2807
2808 // Original version is no longer available.
2809 if (m == nullptr || !version_matches(m, bte._version)) {
2810 return false;
2811 }
2812
2813 *method = m;
2814 *bci = bte._bci;
2815 return true;
2816 }
2817
2818 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2819 // Allocate java.lang.StackTraceElement instance
2820 InstanceKlass* k = vmClasses::StackTraceElement_klass();
2821 assert(k != nullptr, "must be loaded in 1.4+");
2822 if (k->should_be_initialized()) {
2823 k->initialize(CHECK_NULL);
2824 }
2825
2826 Handle element = k->allocate_instance_handle(CHECK_NULL);
2827
2828 int version = method->constants()->version();
2829 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
2830 return element();
2831 }
2832
2833 void java_lang_StackTraceElement::fill_in(Handle element,
2834 InstanceKlass* holder, const methodHandle& method,
2835 int version, int bci, Symbol* name, TRAPS) {
2836 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
2837
2838 ResourceMark rm(THREAD);
2839 HandleMark hm(THREAD);
2840
2841 // Fill in class name
2842 Handle java_class(THREAD, holder->java_mirror());
2843 oop classname = java_lang_Class::name(java_class, CHECK);
2844 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2845 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2846
2847 oop loader = holder->class_loader();
2848 if (loader != nullptr) {
2849 oop loader_name = java_lang_ClassLoader::name(loader);
2850 if (loader_name != nullptr)
2851 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2852 }
2853
2854 // Fill in method name
2855 oop methodname = StringTable::intern(name, CHECK);
2856 java_lang_StackTraceElement::set_methodName(element(), methodname);
2857
2858 // Fill in module name and version
2859 ModuleEntry* module = holder->module();
2860 if (module->is_named()) {
2861 oop module_name = StringTable::intern(module->name(), CHECK);
2862 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2863 oop module_version;
2864 if (module->version() != nullptr) {
2865 module_version = StringTable::intern(module->version(), CHECK);
2866 } else {
2867 module_version = nullptr;
2868 }
2869 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2870 }
2871
2872 if (method() == nullptr || !version_matches(method(), version)) {
2873 // The method was redefined, accurate line number information isn't available
2874 java_lang_StackTraceElement::set_fileName(element(), nullptr);
2875 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2876 } else {
2877 Symbol* source;
2878 oop source_file;
2879 int line_number;
2880 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
2881
2882 java_lang_StackTraceElement::set_fileName(element(), source_file);
2883 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2884 }
2885 }
2886
2887 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
2888 InstanceKlass* holder,
2889 int version,
2890 const methodHandle& method,
2891 int bci,
2892 Symbol*& source,
2893 oop& source_file,
2894 int& line_number, TRAPS) {
2895 // Fill in source file name and line number.
2896 source = Backtrace::get_source_file_name(holder, version);
2897 source_file = java_lang_Class::source_file(java_class());
2898 if (source != nullptr) {
2899 // Class was not redefined. We can trust its cache if set,
2900 // else we have to initialize it.
2901 if (source_file == nullptr) {
2902 source_file = StringTable::intern(source, CHECK);
2903 java_lang_Class::set_source_file(java_class(), source_file);
2904 }
2905 } else {
2906 // Class was redefined. Dump the cache if it was set.
2907 if (source_file != nullptr) {
2908 source_file = nullptr;
2909 java_lang_Class::set_source_file(java_class(), source_file);
2910 }
2911 }
2912 line_number = Backtrace::get_line_number(method(), bci);
2913 }
2914
2915 #if INCLUDE_JVMCI
2916 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
2917 Symbol*& filename, int& line_number, TRAPS) {
2918 ResourceMark rm(THREAD);
2919 HandleMark hm(THREAD);
2920
2921 filename = nullptr;
2922 line_number = -1;
2923
2924 oop source_file;
2925 int version = method->constants()->version();
2926 InstanceKlass* holder = method->method_holder();
2927 Handle java_class(THREAD, holder->java_mirror());
2928 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
2929 }
2930 #endif // INCLUDE_JVMCI
2931
2932 // java_lang_StackFrameInfo
2933
2934 int java_lang_StackFrameInfo::_memberName_offset;
2935 int java_lang_StackFrameInfo::_bci_offset;
2936 int java_lang_StackFrameInfo::_version_offset;
2937 int java_lang_StackFrameInfo::_contScope_offset;
2938
2939 #define STACKFRAMEINFO_FIELDS_DO(macro) \
2940 macro(_memberName_offset, k, "memberName", object_signature, false); \
2941 macro(_bci_offset, k, "bci", int_signature, false); \
2942 macro(_contScope_offset, k, "contScope", continuationscope_signature, false)
2943
2944 void java_lang_StackFrameInfo::compute_offsets() {
2945 InstanceKlass* k = vmClasses::StackFrameInfo_klass();
2946 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2947 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2948 }
2949
2950 #if INCLUDE_CDS
2951 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
2952 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2953 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2954 }
2955 #endif
2956
2957 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2958 HandleMark hm(THREAD);
2959 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2960 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2961 // we should expand MemberName::name when Throwable uses StackTrace
2962 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2963 return method;
2964 }
2965
2966 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
2967 // set Method* or mid/cpref
2968 HandleMark hm(THREAD);
2969 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2970 Handle cont_h (THREAD, cont);
2971 InstanceKlass* ik = method->method_holder();
2972 CallInfo info(method(), ik, CHECK);
2973 MethodHandles::init_method_MemberName(mname, info);
2974 // set bci
2975 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2976 // method may be redefined; store the version
2977 int version = method->constants()->version();
2978 assert((jushort)version == version, "version should be short");
2979 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2980
2981 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
2982 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
2983 }
2984
2985 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2986 ResourceMark rm(THREAD);
2987 HandleMark hm(THREAD);
2988 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2989 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2990 InstanceKlass* holder = InstanceKlass::cast(clazz);
2991 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2992
2993 short version = stackFrame->short_field(_version_offset);
2994 int bci = stackFrame->int_field(_bci_offset);
2995 Symbol* name = method->name();
2996 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
2997 }
2998
2999 void java_lang_StackFrameInfo::set_version(oop element, short value) {
3000 element->short_field_put(_version_offset, value);
3001 }
3002
3003 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
3004 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3005 element->int_field_put(_bci_offset, value);
3006 }
3007
3008 void java_lang_StackFrameInfo::set_contScope(oop element, oop value) {
3009 element->obj_field_put(_contScope_offset, value);
3010 }
3011
3012 int java_lang_LiveStackFrameInfo::_monitors_offset;
3013 int java_lang_LiveStackFrameInfo::_locals_offset;
3014 int java_lang_LiveStackFrameInfo::_operands_offset;
3015 int java_lang_LiveStackFrameInfo::_mode_offset;
3016
3017 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3018 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
3019 macro(_locals_offset, k, "locals", object_array_signature, false); \
3020 macro(_operands_offset, k, "operands", object_array_signature, false); \
3021 macro(_mode_offset, k, "mode", int_signature, false)
3022
3023 void java_lang_LiveStackFrameInfo::compute_offsets() {
3024 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3025 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3026 }
3027
3028 #if INCLUDE_CDS
3029 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3030 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3031 }
3032 #endif
3033
3034 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
3035 element->obj_field_put(_monitors_offset, value);
3036 }
3037
3038 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
3039 element->obj_field_put(_locals_offset, value);
3040 }
3041
3042 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
3043 element->obj_field_put(_operands_offset, value);
3044 }
3045
3046 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
3047 element->int_field_put(_mode_offset, value);
3048 }
3049
3050
3051 // java_lang_AccessibleObject
3052
3053 int java_lang_reflect_AccessibleObject::_override_offset;
3054
3055 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3056 macro(_override_offset, k, "override", bool_signature, false)
3057
3058 void java_lang_reflect_AccessibleObject::compute_offsets() {
3059 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3060 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3061 }
3062
3063 #if INCLUDE_CDS
3064 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3065 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3066 }
3067 #endif
3068
3069 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3070 return (jboolean) reflect->bool_field(_override_offset);
3071 }
3072
3073 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3074 reflect->bool_field_put(_override_offset, (int) value);
3075 }
3076
3077 // java_lang_reflect_Method
3078
3079 int java_lang_reflect_Method::_clazz_offset;
3080 int java_lang_reflect_Method::_name_offset;
3081 int java_lang_reflect_Method::_returnType_offset;
3082 int java_lang_reflect_Method::_parameterTypes_offset;
3083 int java_lang_reflect_Method::_exceptionTypes_offset;
3084 int java_lang_reflect_Method::_slot_offset;
3085 int java_lang_reflect_Method::_modifiers_offset;
3086 int java_lang_reflect_Method::_signature_offset;
3087 int java_lang_reflect_Method::_annotations_offset;
3088 int java_lang_reflect_Method::_parameter_annotations_offset;
3089 int java_lang_reflect_Method::_annotation_default_offset;
3090
3091 #define METHOD_FIELDS_DO(macro) \
3092 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3093 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3094 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
3095 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3096 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3097 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3098 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3099 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3100 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3101 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3102 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
3103
3104 void java_lang_reflect_Method::compute_offsets() {
3105 InstanceKlass* k = vmClasses::reflect_Method_klass();
3106 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3107 }
3108
3109 #if INCLUDE_CDS
3110 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3111 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3112 }
3113 #endif
3114
3115 Handle java_lang_reflect_Method::create(TRAPS) {
3116 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3117 Klass* klass = vmClasses::reflect_Method_klass();
3118 // This class is eagerly initialized during VM initialization, since we keep a reference
3119 // to one of the methods
3120 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
3121 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
3122 }
3123
3124 oop java_lang_reflect_Method::clazz(oop reflect) {
3125 return reflect->obj_field(_clazz_offset);
3126 }
3127
3128 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3129 reflect->obj_field_put(_clazz_offset, value);
3130 }
3131
3132 int java_lang_reflect_Method::slot(oop reflect) {
3133 return reflect->int_field(_slot_offset);
3134 }
3135
3136 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3137 reflect->int_field_put(_slot_offset, value);
3138 }
3139
3140 void java_lang_reflect_Method::set_name(oop method, oop value) {
3141 method->obj_field_put(_name_offset, value);
3142 }
3143
3144 oop java_lang_reflect_Method::return_type(oop method) {
3145 return method->obj_field(_returnType_offset);
3146 }
3147
3148 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3149 method->obj_field_put(_returnType_offset, value);
3150 }
3151
3152 oop java_lang_reflect_Method::parameter_types(oop method) {
3153 return method->obj_field(_parameterTypes_offset);
3154 }
3155
3156 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3157 method->obj_field_put(_parameterTypes_offset, value);
3158 }
3159
3160 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3161 method->obj_field_put(_exceptionTypes_offset, value);
3162 }
3163
3164 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3165 method->int_field_put(_modifiers_offset, value);
3166 }
3167
3168 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3169 method->obj_field_put(_signature_offset, value);
3170 }
3171
3172 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3173 method->obj_field_put(_annotations_offset, value);
3174 }
3175
3176 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3177 method->obj_field_put(_parameter_annotations_offset, value);
3178 }
3179
3180 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3181 method->obj_field_put(_annotation_default_offset, value);
3182 }
3183
3184 int java_lang_reflect_Constructor::_clazz_offset;
3185 int java_lang_reflect_Constructor::_parameterTypes_offset;
3186 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3187 int java_lang_reflect_Constructor::_slot_offset;
3188 int java_lang_reflect_Constructor::_modifiers_offset;
3189 int java_lang_reflect_Constructor::_signature_offset;
3190 int java_lang_reflect_Constructor::_annotations_offset;
3191 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3192
3193 #define CONSTRUCTOR_FIELDS_DO(macro) \
3194 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3195 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3196 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3197 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3198 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3199 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3200 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3201 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3202
3203 void java_lang_reflect_Constructor::compute_offsets() {
3204 InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3205 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3206 }
3207
3208 #if INCLUDE_CDS
3209 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3210 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3211 }
3212 #endif
3213
3214 Handle java_lang_reflect_Constructor::create(TRAPS) {
3215 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3216 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3217 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3218 InstanceKlass* ik = InstanceKlass::cast(k);
3219 // Ensure it is initialized
3220 ik->initialize(CHECK_NH);
3221 return ik->allocate_instance_handle(THREAD);
3222 }
3223
3224 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3225 return reflect->obj_field(_clazz_offset);
3226 }
3227
3228 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3229 reflect->obj_field_put(_clazz_offset, value);
3230 }
3231
3232 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3233 return constructor->obj_field(_parameterTypes_offset);
3234 }
3235
3236 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3237 constructor->obj_field_put(_parameterTypes_offset, value);
3238 }
3239
3240 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3241 constructor->obj_field_put(_exceptionTypes_offset, value);
3242 }
3243
3244 int java_lang_reflect_Constructor::slot(oop reflect) {
3245 return reflect->int_field(_slot_offset);
3246 }
3247
3248 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3249 reflect->int_field_put(_slot_offset, value);
3250 }
3251
3252 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3253 constructor->int_field_put(_modifiers_offset, value);
3254 }
3255
3256 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3257 constructor->obj_field_put(_signature_offset, value);
3258 }
3259
3260 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3261 constructor->obj_field_put(_annotations_offset, value);
3262 }
3263
3264 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3265 method->obj_field_put(_parameter_annotations_offset, value);
3266 }
3267
3268 int java_lang_reflect_Field::_clazz_offset;
3269 int java_lang_reflect_Field::_name_offset;
3270 int java_lang_reflect_Field::_type_offset;
3271 int java_lang_reflect_Field::_slot_offset;
3272 int java_lang_reflect_Field::_modifiers_offset;
3273 int java_lang_reflect_Field::_trusted_final_offset;
3274 int java_lang_reflect_Field::_signature_offset;
3275 int java_lang_reflect_Field::_annotations_offset;
3276
3277 #define FIELD_FIELDS_DO(macro) \
3278 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3279 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3280 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \
3281 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3282 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3283 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \
3284 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3285 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3286
3287 void java_lang_reflect_Field::compute_offsets() {
3288 InstanceKlass* k = vmClasses::reflect_Field_klass();
3289 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3290 }
3291
3292 #if INCLUDE_CDS
3293 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3294 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3295 }
3296 #endif
3297
3298 Handle java_lang_reflect_Field::create(TRAPS) {
3299 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3300 Symbol* name = vmSymbols::java_lang_reflect_Field();
3301 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3302 InstanceKlass* ik = InstanceKlass::cast(k);
3303 // Ensure it is initialized
3304 ik->initialize(CHECK_NH);
3305 return ik->allocate_instance_handle(THREAD);
3306 }
3307
3308 oop java_lang_reflect_Field::clazz(oop reflect) {
3309 return reflect->obj_field(_clazz_offset);
3310 }
3311
3312 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3313 reflect->obj_field_put(_clazz_offset, value);
3314 }
3315
3316 oop java_lang_reflect_Field::name(oop field) {
3317 return field->obj_field(_name_offset);
3318 }
3319
3320 void java_lang_reflect_Field::set_name(oop field, oop value) {
3321 field->obj_field_put(_name_offset, value);
3322 }
3323
3324 oop java_lang_reflect_Field::type(oop field) {
3325 return field->obj_field(_type_offset);
3326 }
3327
3328 void java_lang_reflect_Field::set_type(oop field, oop value) {
3329 field->obj_field_put(_type_offset, value);
3330 }
3331
3332 int java_lang_reflect_Field::slot(oop reflect) {
3333 return reflect->int_field(_slot_offset);
3334 }
3335
3336 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3337 reflect->int_field_put(_slot_offset, value);
3338 }
3339
3340 int java_lang_reflect_Field::modifiers(oop field) {
3341 return field->int_field(_modifiers_offset);
3342 }
3343
3344 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3345 field->int_field_put(_modifiers_offset, value);
3346 }
3347
3348 void java_lang_reflect_Field::set_trusted_final(oop field) {
3349 field->bool_field_put(_trusted_final_offset, true);
3350 }
3351
3352 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3353 field->obj_field_put(_signature_offset, value);
3354 }
3355
3356 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3357 field->obj_field_put(_annotations_offset, value);
3358 }
3359
3360 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3361 // Allocate java.lang.reflect.RecordComponent instance
3362 HandleMark hm(THREAD);
3363 InstanceKlass* ik = vmClasses::RecordComponent_klass();
3364 assert(ik != nullptr, "must be loaded");
3365 ik->initialize(CHECK_NULL);
3366
3367 Handle element = ik->allocate_instance_handle(CHECK_NULL);
3368
3369 Handle decl_class(THREAD, holder->java_mirror());
3370 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3371
3372 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3373 oop component_name = StringTable::intern(name, CHECK_NULL);
3374 java_lang_reflect_RecordComponent::set_name(element(), component_name);
3375
3376 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3377 Handle component_type_h =
3378 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3379 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3380
3381 Method* accessor_method = nullptr;
3382 {
3383 // Prepend "()" to type to create the full method signature.
3384 ResourceMark rm(THREAD);
3385 int sig_len = type->utf8_length() + 3; // "()" and null char
3386 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3387 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3388 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3389 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3390 }
3391
3392 if (accessor_method != nullptr) {
3393 methodHandle method(THREAD, accessor_method);
3394 oop m = Reflection::new_method(method, false, CHECK_NULL);
3395 java_lang_reflect_RecordComponent::set_accessor(element(), m);
3396 } else {
3397 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3398 }
3399
3400 int sig_index = component->generic_signature_index();
3401 if (sig_index > 0) {
3402 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3403 oop component_sig = StringTable::intern(sig, CHECK_NULL);
3404 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3405 } else {
3406 java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3407 }
3408
3409 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3410 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3411
3412 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3413 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3414
3415 return element();
3416 }
3417
3418 int reflect_ConstantPool::_oop_offset;
3419
3420 #define CONSTANTPOOL_FIELDS_DO(macro) \
3421 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3422
3423 void reflect_ConstantPool::compute_offsets() {
3424 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3425 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3426 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3427 }
3428
3429 #if INCLUDE_CDS
3430 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3431 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3432 }
3433 #endif
3434
3435 int java_lang_reflect_Parameter::_name_offset;
3436 int java_lang_reflect_Parameter::_modifiers_offset;
3437 int java_lang_reflect_Parameter::_index_offset;
3438 int java_lang_reflect_Parameter::_executable_offset;
3439
3440 #define PARAMETER_FIELDS_DO(macro) \
3441 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3442 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3443 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \
3444 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3445
3446 void java_lang_reflect_Parameter::compute_offsets() {
3447 InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3448 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3449 }
3450
3451 #if INCLUDE_CDS
3452 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3453 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3454 }
3455 #endif
3456
3457 Handle java_lang_reflect_Parameter::create(TRAPS) {
3458 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3459 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3460 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3461 InstanceKlass* ik = InstanceKlass::cast(k);
3462 // Ensure it is initialized
3463 ik->initialize(CHECK_NH);
3464 return ik->allocate_instance_handle(THREAD);
3465 }
3466
3467 oop java_lang_reflect_Parameter::name(oop param) {
3468 return param->obj_field(_name_offset);
3469 }
3470
3471 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3472 param->obj_field_put(_name_offset, value);
3473 }
3474
3475 int java_lang_reflect_Parameter::modifiers(oop param) {
3476 return param->int_field(_modifiers_offset);
3477 }
3478
3479 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3480 param->int_field_put(_modifiers_offset, value);
3481 }
3482
3483 int java_lang_reflect_Parameter::index(oop param) {
3484 return param->int_field(_index_offset);
3485 }
3486
3487 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3488 param->int_field_put(_index_offset, value);
3489 }
3490
3491 oop java_lang_reflect_Parameter::executable(oop param) {
3492 return param->obj_field(_executable_offset);
3493 }
3494
3495 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3496 param->obj_field_put(_executable_offset, value);
3497 }
3498
3499 // java_lang_Module
3500
3501 int java_lang_Module::_loader_offset;
3502 int java_lang_Module::_name_offset;
3503 int java_lang_Module::_module_entry_offset;
3504
3505 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3506 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3507 return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3508 vmSymbols::java_lang_module_init_signature(),
3509 loader, module_name, CHECK_NH);
3510 }
3511
3512 #define MODULE_FIELDS_DO(macro) \
3513 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3514 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false)
3515
3516 void java_lang_Module::compute_offsets() {
3517 InstanceKlass* k = vmClasses::Module_klass();
3518 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3519 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3520 }
3521
3522 #if INCLUDE_CDS
3523 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3524 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3525 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3526 }
3527 #endif
3528
3529 oop java_lang_Module::loader(oop module) {
3530 return module->obj_field(_loader_offset);
3531 }
3532
3533 void java_lang_Module::set_loader(oop module, oop value) {
3534 module->obj_field_put(_loader_offset, value);
3535 }
3536
3537 oop java_lang_Module::name(oop module) {
3538 return module->obj_field(_name_offset);
3539 }
3540
3541 void java_lang_Module::set_name(oop module, oop value) {
3542 module->obj_field_put(_name_offset, value);
3543 }
3544
3545 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3546 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3547 assert(module != nullptr, "module can't be null");
3548 assert(oopDesc::is_oop(module), "module must be oop");
3549
3550 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3551 return module_entry;
3552 }
3553
3554 ModuleEntry* java_lang_Module::module_entry(oop module) {
3555 ModuleEntry* module_entry = module_entry_raw(module);
3556 if (module_entry == nullptr) {
3557 // If the inject field containing the ModuleEntry* is null then return the
3558 // class loader's unnamed module.
3559 oop loader = java_lang_Module::loader(module);
3560 Handle h_loader = Handle(Thread::current(), loader);
3561 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3562 return loader_cld->unnamed_module();
3563 }
3564 return module_entry;
3565 }
3566
3567 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3568 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3569 assert(module != nullptr, "module can't be null");
3570 assert(oopDesc::is_oop(module), "module must be oop");
3571 module->address_field_put(_module_entry_offset, (address)module_entry);
3572 }
3573
3574 Handle reflect_ConstantPool::create(TRAPS) {
3575 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3576 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3577 // Ensure it is initialized
3578 k->initialize(CHECK_NH);
3579 return k->allocate_instance_handle(THREAD);
3580 }
3581
3582
3583 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3584 oop mirror = value->pool_holder()->java_mirror();
3585 // Save the mirror to get back the constant pool.
3586 reflect->obj_field_put(_oop_offset, mirror);
3587 }
3588
3589 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3590
3591 oop mirror = reflect->obj_field(_oop_offset);
3592 Klass* k = java_lang_Class::as_Klass(mirror);
3593 assert(k->is_instance_klass(), "Must be");
3594
3595 // Get the constant pool back from the klass. Since class redefinition
3596 // merges the new constant pool into the old, this is essentially the
3597 // same constant pool as the original. If constant pool merging is
3598 // no longer done in the future, this will have to change to save
3599 // the original.
3600 return InstanceKlass::cast(k)->constants();
3601 }
3602
3603 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3604
3605 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3606 macro(_base_offset, k, "base", object_signature, false)
3607
3608 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3609 InstanceKlass* k = vmClasses::reflect_UnsafeStaticFieldAccessorImpl_klass();
3610 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3611 }
3612
3613 #if INCLUDE_CDS
3614 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) {
3615 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3616 }
3617 #endif
3618
3619 // Support for java_lang_ref_Reference
3620
3621 bool java_lang_ref_Reference::_offsets_initialized;
3622
3623 int java_lang_ref_Reference::_referent_offset;
3624 int java_lang_ref_Reference::_queue_offset;
3625 int java_lang_ref_Reference::_next_offset;
3626 int java_lang_ref_Reference::_discovered_offset;
3627
3628 #define REFERENCE_FIELDS_DO(macro) \
3629 macro(_referent_offset, k, "referent", object_signature, false); \
3630 macro(_queue_offset, k, "queue", referencequeue_signature, false); \
3631 macro(_next_offset, k, "next", reference_signature, false); \
3632 macro(_discovered_offset, k, "discovered", reference_signature, false);
3633
3634 void java_lang_ref_Reference::compute_offsets() {
3635 if (_offsets_initialized) {
3636 return;
3637 }
3638 _offsets_initialized = true;
3639 InstanceKlass* k = vmClasses::Reference_klass();
3640 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3641 }
3642
3643 #if INCLUDE_CDS
3644 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3645 f->do_bool(&_offsets_initialized);
3646 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3647 }
3648 #endif
3649
3650 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3651 assert(obj != nullptr, "sanity");
3652 if (offset != _referent_offset) {
3653 return false;
3654 }
3655
3656 Klass* k = obj->klass();
3657 if (!k->is_instance_klass()) {
3658 return false;
3659 }
3660
3661 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3662 bool is_reference = ik->reference_type() != REF_NONE;
3663 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
3664 return is_reference;
3665 }
3666
3667 int java_lang_boxing_object::_value_offset;
3668 int java_lang_boxing_object::_long_value_offset;
3669
3670 #define BOXING_FIELDS_DO(macro) \
3671 macro(_value_offset, integerKlass, "value", int_signature, false); \
3672 macro(_long_value_offset, longKlass, "value", long_signature, false);
3673
3674 void java_lang_boxing_object::compute_offsets() {
3675 InstanceKlass* integerKlass = vmClasses::Integer_klass();
3676 InstanceKlass* longKlass = vmClasses::Long_klass();
3677 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3678 }
3679
3680 #if INCLUDE_CDS
3681 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
3682 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3683 }
3684 #endif
3685
3686 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3687 Klass* k = vmClasses::box_klass(type);
3688 if (k == nullptr) return nullptr;
3689 InstanceKlass* ik = InstanceKlass::cast(k);
3690 if (!ik->is_initialized()) {
3691 ik->initialize(CHECK_NULL);
3692 }
3693 return ik->allocate_instance(THREAD);
3694 }
3695
3696
3697 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3698 oop box = initialize_and_allocate(type, CHECK_NULL);
3699 if (box == nullptr) return nullptr;
3700 switch (type) {
3701 case T_BOOLEAN:
3702 box->bool_field_put(_value_offset, value->z);
3703 break;
3704 case T_CHAR:
3705 box->char_field_put(_value_offset, value->c);
3706 break;
3707 case T_FLOAT:
3708 box->float_field_put(_value_offset, value->f);
3709 break;
3710 case T_DOUBLE:
3711 box->double_field_put(_long_value_offset, value->d);
3712 break;
3713 case T_BYTE:
3714 box->byte_field_put(_value_offset, value->b);
3715 break;
3716 case T_SHORT:
3717 box->short_field_put(_value_offset, value->s);
3718 break;
3719 case T_INT:
3720 box->int_field_put(_value_offset, value->i);
3721 break;
3722 case T_LONG:
3723 box->long_field_put(_long_value_offset, value->j);
3724 break;
3725 default:
3726 return nullptr;
3727 }
3728 return box;
3729 }
3730
3731
3732 BasicType java_lang_boxing_object::basic_type(oop box) {
3733 if (box == nullptr) return T_ILLEGAL;
3734 BasicType type = vmClasses::box_klass_type(box->klass());
3735 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3736 return T_ILLEGAL;
3737 return type;
3738 }
3739
3740
3741 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3742 BasicType type = vmClasses::box_klass_type(box->klass());
3743 switch (type) {
3744 case T_BOOLEAN:
3745 value->z = box->bool_field(_value_offset);
3746 break;
3747 case T_CHAR:
3748 value->c = box->char_field(_value_offset);
3749 break;
3750 case T_FLOAT:
3751 value->f = box->float_field(_value_offset);
3752 break;
3753 case T_DOUBLE:
3754 value->d = box->double_field(_long_value_offset);
3755 break;
3756 case T_BYTE:
3757 value->b = box->byte_field(_value_offset);
3758 break;
3759 case T_SHORT:
3760 value->s = box->short_field(_value_offset);
3761 break;
3762 case T_INT:
3763 value->i = box->int_field(_value_offset);
3764 break;
3765 case T_LONG:
3766 value->j = box->long_field(_long_value_offset);
3767 break;
3768 default:
3769 return T_ILLEGAL;
3770 } // end switch
3771 return type;
3772 }
3773
3774
3775 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3776 BasicType type = vmClasses::box_klass_type(box->klass());
3777 switch (type) {
3778 case T_BOOLEAN:
3779 box->bool_field_put(_value_offset, value->z);
3780 break;
3781 case T_CHAR:
3782 box->char_field_put(_value_offset, value->c);
3783 break;
3784 case T_FLOAT:
3785 box->float_field_put(_value_offset, value->f);
3786 break;
3787 case T_DOUBLE:
3788 box->double_field_put(_long_value_offset, value->d);
3789 break;
3790 case T_BYTE:
3791 box->byte_field_put(_value_offset, value->b);
3792 break;
3793 case T_SHORT:
3794 box->short_field_put(_value_offset, value->s);
3795 break;
3796 case T_INT:
3797 box->int_field_put(_value_offset, value->i);
3798 break;
3799 case T_LONG:
3800 box->long_field_put(_long_value_offset, value->j);
3801 break;
3802 default:
3803 return T_ILLEGAL;
3804 } // end switch
3805 return type;
3806 }
3807
3808
3809 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3810 switch (type) {
3811 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3812 case T_CHAR: st->print("%d", value->c); break;
3813 case T_BYTE: st->print("%d", value->b); break;
3814 case T_SHORT: st->print("%d", value->s); break;
3815 case T_INT: st->print("%d", value->i); break;
3816 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3817 case T_FLOAT: st->print("%f", value->f); break;
3818 case T_DOUBLE: st->print("%lf", value->d); break;
3819 default: st->print("type %d?", type); break;
3820 }
3821 }
3822
3823
3824 // Support for java_lang_ref_SoftReference
3825 //
3826
3827 int java_lang_ref_SoftReference::_timestamp_offset;
3828 int java_lang_ref_SoftReference::_static_clock_offset;
3829
3830 #define SOFTREFERENCE_FIELDS_DO(macro) \
3831 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
3832 macro(_static_clock_offset, k, "clock", long_signature, true)
3833
3834 void java_lang_ref_SoftReference::compute_offsets() {
3835 InstanceKlass* k = vmClasses::SoftReference_klass();
3836 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3837 }
3838
3839 #if INCLUDE_CDS
3840 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3841 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3842 }
3843 #endif
3844
3845 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3846 return ref->long_field(_timestamp_offset);
3847 }
3848
3849 jlong java_lang_ref_SoftReference::clock() {
3850 InstanceKlass* ik = vmClasses::SoftReference_klass();
3851 oop base = ik->static_field_base_raw();
3852 return base->long_field(_static_clock_offset);
3853 }
3854
3855 void java_lang_ref_SoftReference::set_clock(jlong value) {
3856 InstanceKlass* ik = vmClasses::SoftReference_klass();
3857 oop base = ik->static_field_base_raw();
3858 base->long_field_put(_static_clock_offset, value);
3859 }
3860
3861 // Support for java_lang_invoke_DirectMethodHandle
3862
3863 int java_lang_invoke_DirectMethodHandle::_member_offset;
3864
3865 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3866 oop member_name = nullptr;
3867 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3868 "a DirectMethodHandle oop is expected");
3869 return dmh->obj_field(_member_offset);
3870 }
3871
3872 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3873 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3874
3875 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3876 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
3877 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3878 }
3879
3880 #if INCLUDE_CDS
3881 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3882 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3883 }
3884 #endif
3885
3886 // Support for java_lang_invoke_MethodHandle
3887
3888 int java_lang_invoke_MethodHandle::_type_offset;
3889 int java_lang_invoke_MethodHandle::_form_offset;
3890
3891 int java_lang_invoke_MemberName::_clazz_offset;
3892 int java_lang_invoke_MemberName::_name_offset;
3893 int java_lang_invoke_MemberName::_type_offset;
3894 int java_lang_invoke_MemberName::_flags_offset;
3895 int java_lang_invoke_MemberName::_method_offset;
3896 int java_lang_invoke_MemberName::_vmindex_offset;
3897
3898 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3899 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3900
3901 int java_lang_invoke_LambdaForm::_vmentry_offset;
3902
3903 #define METHODHANDLE_FIELDS_DO(macro) \
3904 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3905 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
3906
3907 void java_lang_invoke_MethodHandle::compute_offsets() {
3908 InstanceKlass* k = vmClasses::MethodHandle_klass();
3909 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3910 }
3911
3912 #if INCLUDE_CDS
3913 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
3914 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3915 }
3916 #endif
3917
3918 #define MEMBERNAME_FIELDS_DO(macro) \
3919 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3920 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3921 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
3922 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3923 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
3924
3925 void java_lang_invoke_MemberName::compute_offsets() {
3926 InstanceKlass* k = vmClasses::MemberName_klass();
3927 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3928 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3929 }
3930
3931 #if INCLUDE_CDS
3932 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
3933 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3934 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3935 }
3936 #endif
3937
3938 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3939 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
3940 assert(k != nullptr, "jdk mismatch");
3941 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3942 }
3943
3944 #if INCLUDE_CDS
3945 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
3946 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3947 }
3948 #endif
3949
3950 #define LAMBDAFORM_FIELDS_DO(macro) \
3951 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
3952
3953 void java_lang_invoke_LambdaForm::compute_offsets() {
3954 InstanceKlass* k = vmClasses::LambdaForm_klass();
3955 assert (k != nullptr, "jdk mismatch");
3956 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3957 }
3958
3959 #if INCLUDE_CDS
3960 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
3961 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3962 }
3963 #endif
3964
3965 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3966 return obj != nullptr && is_subclass(obj->klass());
3967 }
3968
3969 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
3970 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
3971
3972 #define NEP_FIELDS_DO(macro) \
3973 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
3974 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
3975
3976 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
3977 return obj != nullptr && is_subclass(obj->klass());
3978 }
3979
3980 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
3981 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
3982 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3983 }
3984
3985 #if INCLUDE_CDS
3986 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
3987 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3988 }
3989 #endif
3990
3991 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
3992 return entry->obj_field(_method_type_offset);
3993 }
3994
3995 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
3996 return entry->long_field(_downcall_stub_address_offset);
3997 }
3998
3999 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4000 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4001 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4002 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4003 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4004 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4005 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4006
4007 #define ABIDescriptor_FIELDS_DO(macro) \
4008 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4009 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4010 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4011 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4012 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4013 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4014 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4015
4016 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4017 return obj != nullptr && is_subclass(obj->klass());
4018 }
4019
4020 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4021 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4022 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4023 }
4024
4025 #if INCLUDE_CDS
4026 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4027 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4028 }
4029 #endif
4030
4031 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4032 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4033 }
4034
4035 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4036 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4037 }
4038
4039 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4040 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4041 }
4042
4043 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4044 return entry->int_field(_stackAlignment_offset);
4045 }
4046
4047 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4048 return entry->int_field(_shadowSpace_offset);
4049 }
4050
4051 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4052 return entry->obj_field(_scratch1_offset);
4053 }
4054
4055 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4056 return entry->obj_field(_scratch2_offset);
4057 }
4058
4059 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4060 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4061 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4062 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4063
4064 #define VMStorage_FIELDS_DO(macro) \
4065 macro(_type_offset, k, "type", byte_signature, false); \
4066 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4067 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4068 macro(_debugName_offset, k, "debugName", string_signature, false); \
4069
4070 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4071 return obj != nullptr && is_subclass(obj->klass());
4072 }
4073
4074 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4075 InstanceKlass* k = vmClasses::VMStorage_klass();
4076 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4077 }
4078
4079 #if INCLUDE_CDS
4080 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4081 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4082 }
4083 #endif
4084
4085 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4086 return entry->byte_field(_type_offset);
4087 }
4088
4089 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4090 return entry->int_field(_indexOrOffset_offset);
4091 }
4092
4093 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4094 return entry->short_field(_segmentMaskOrSize_offset);
4095 }
4096
4097 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4098 return entry->obj_field(_debugName_offset);
4099 }
4100
4101 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4102 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4103
4104 #define CallConv_FIELDS_DO(macro) \
4105 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4106 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4107
4108 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4109 return obj != nullptr && is_subclass(obj->klass());
4110 }
4111
4112 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4113 InstanceKlass* k = vmClasses::CallConv_klass();
4114 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4115 }
4116
4117 #if INCLUDE_CDS
4118 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4119 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4120 }
4121 #endif
4122
4123 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4124 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4125 }
4126
4127 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4128 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4129 }
4130
4131 oop java_lang_invoke_MethodHandle::type(oop mh) {
4132 return mh->obj_field(_type_offset);
4133 }
4134
4135 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4136 mh->obj_field_put(_type_offset, mtype);
4137 }
4138
4139 oop java_lang_invoke_MethodHandle::form(oop mh) {
4140 assert(_form_offset != 0, "");
4141 return mh->obj_field(_form_offset);
4142 }
4143
4144 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4145 assert(_form_offset != 0, "");
4146 mh->obj_field_put(_form_offset, lform);
4147 }
4148
4149 /// MemberName accessors
4150
4151 oop java_lang_invoke_MemberName::clazz(oop mname) {
4152 assert(is_instance(mname), "wrong type");
4153 return mname->obj_field(_clazz_offset);
4154 }
4155
4156 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4157 assert(is_instance(mname), "wrong type");
4158 mname->obj_field_put(_clazz_offset, clazz);
4159 }
4160
4161 oop java_lang_invoke_MemberName::name(oop mname) {
4162 assert(is_instance(mname), "wrong type");
4163 return mname->obj_field(_name_offset);
4164 }
4165
4166 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4167 assert(is_instance(mname), "wrong type");
4168 mname->obj_field_put(_name_offset, name);
4169 }
4170
4171 oop java_lang_invoke_MemberName::type(oop mname) {
4172 assert(is_instance(mname), "wrong type");
4173 return mname->obj_field(_type_offset);
4174 }
4175
4176 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4177 assert(is_instance(mname), "wrong type");
4178 mname->obj_field_put(_type_offset, type);
4179 }
4180
4181 int java_lang_invoke_MemberName::flags(oop mname) {
4182 assert(is_instance(mname), "wrong type");
4183 return mname->int_field(_flags_offset);
4184 }
4185
4186 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4187 assert(is_instance(mname), "wrong type");
4188 mname->int_field_put(_flags_offset, flags);
4189 }
4190
4191
4192 // Return vmtarget from ResolvedMethodName method field through indirection
4193 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4194 assert(is_instance(mname), "wrong type");
4195 oop method = mname->obj_field(_method_offset);
4196 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4197 }
4198
4199 bool java_lang_invoke_MemberName::is_method(oop mname) {
4200 assert(is_instance(mname), "must be MemberName");
4201 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
4202 }
4203
4204 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4205 assert(is_instance(mname), "wrong type");
4206 mname->obj_field_put(_method_offset, resolved_method);
4207 }
4208
4209 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4210 assert(is_instance(mname), "wrong type");
4211 return (intptr_t) mname->address_field(_vmindex_offset);
4212 }
4213
4214 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4215 assert(is_instance(mname), "wrong type");
4216 mname->address_field_put(_vmindex_offset, (address) index);
4217 }
4218
4219
4220 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4221 assert(is_instance(resolved_method), "wrong type");
4222 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4223 assert(m->is_method(), "must be");
4224 return m;
4225 }
4226
4227 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4228 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4229 assert(is_instance(resolved_method), "wrong type");
4230 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4231 }
4232
4233 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4234 assert(is_instance(resolved_method), "wrong type");
4235 resolved_method->obj_field_put(_vmholder_offset, holder);
4236 }
4237
4238 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4239 const Method* method = m();
4240
4241 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4242 oop resolved_method = ResolvedMethodTable::find_method(method);
4243 if (resolved_method != nullptr) {
4244 return resolved_method;
4245 }
4246
4247 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4248 if (!k->is_initialized()) {
4249 k->initialize(CHECK_NULL);
4250 }
4251
4252 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4253
4254 NoSafepointVerifier nsv;
4255
4256 if (method->is_old()) {
4257 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4258 method->get_new_method();
4259 }
4260
4261 InstanceKlass* holder = method->method_holder();
4262
4263 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4264 // Add a reference to the loader (actually mirror because hidden classes may not have
4265 // distinct loaders) to ensure the metadata is kept alive.
4266 // This mirror may be different than the one in clazz field.
4267 set_vmholder(new_resolved_method, holder->java_mirror());
4268
4269 // Set flag in class to indicate this InstanceKlass has entries in the table
4270 // to avoid walking table during redefinition if none of the redefined classes
4271 // have any membernames in the table.
4272 holder->set_has_resolved_methods();
4273
4274 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4275 }
4276
4277 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4278 assert(is_instance(lform), "wrong type");
4279 return lform->obj_field(_vmentry_offset);
4280 }
4281
4282
4283 // Support for java_lang_invoke_MethodType
4284
4285 int java_lang_invoke_MethodType::_rtype_offset;
4286 int java_lang_invoke_MethodType::_ptypes_offset;
4287
4288 #define METHODTYPE_FIELDS_DO(macro) \
4289 macro(_rtype_offset, k, "rtype", class_signature, false); \
4290 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4291
4292 void java_lang_invoke_MethodType::compute_offsets() {
4293 InstanceKlass* k = vmClasses::MethodType_klass();
4294 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4295 }
4296
4297 #if INCLUDE_CDS
4298 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4299 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4300 }
4301 #endif
4302
4303 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4304 st->print("(");
4305 objArrayOop pts = ptypes(mt);
4306 if (pts != nullptr) {
4307 for (int i = 0, limit = pts->length(); i < limit; i++) {
4308 java_lang_Class::print_signature(pts->obj_at(i), st);
4309 }
4310 } else {
4311 st->print("null");
4312 }
4313 st->print(")");
4314 oop rt = rtype(mt);
4315 if (rt != nullptr) {
4316 java_lang_Class::print_signature(rt, st);
4317 } else {
4318 st->print("null");
4319 }
4320 }
4321
4322 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4323 ResourceMark rm;
4324 stringStream buffer(128);
4325 print_signature(mt, &buffer);
4326 const char* sigstr = buffer.base();
4327 int siglen = (int) buffer.size();
4328 Symbol *name;
4329 if (!intern_if_not_found) {
4330 name = SymbolTable::probe(sigstr, siglen);
4331 } else {
4332 name = SymbolTable::new_symbol(sigstr, siglen);
4333 }
4334 return name;
4335 }
4336
4337 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4338 if (mt1 == mt2)
4339 return true;
4340 if (rtype(mt1) != rtype(mt2))
4341 return false;
4342 if (ptype_count(mt1) != ptype_count(mt2))
4343 return false;
4344 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4345 if (ptype(mt1, i) != ptype(mt2, i))
4346 return false;
4347 }
4348 return true;
4349 }
4350
4351 oop java_lang_invoke_MethodType::rtype(oop mt) {
4352 assert(is_instance(mt), "must be a MethodType");
4353 return mt->obj_field(_rtype_offset);
4354 }
4355
4356 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4357 assert(is_instance(mt), "must be a MethodType");
4358 return (objArrayOop) mt->obj_field(_ptypes_offset);
4359 }
4360
4361 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4362 return ptypes(mt)->obj_at(idx);
4363 }
4364
4365 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4366 return ptypes(mt)->length();
4367 }
4368
4369 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4370 objArrayOop pts = ptypes(mt);
4371 int count = pts->length();
4372 int slots = 0;
4373 for (int i = 0; i < count; i++) {
4374 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4375 slots += type2size[bt];
4376 }
4377 return slots;
4378 }
4379
4380 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4381 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4382 return type2size[bt];
4383 }
4384
4385
4386 // Support for java_lang_invoke_CallSite
4387
4388 int java_lang_invoke_CallSite::_target_offset;
4389 int java_lang_invoke_CallSite::_context_offset;
4390
4391 #define CALLSITE_FIELDS_DO(macro) \
4392 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
4393 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
4394
4395 void java_lang_invoke_CallSite::compute_offsets() {
4396 InstanceKlass* k = vmClasses::CallSite_klass();
4397 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4398 }
4399
4400 #if INCLUDE_CDS
4401 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4402 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4403 }
4404 #endif
4405
4406 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
4407 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4408
4409 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
4410 return dep_oop;
4411 }
4412
4413 // Support for java_lang_invoke_ConstantCallSite
4414
4415 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4416
4417 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4418 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4419
4420 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4421 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4422 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4423 }
4424
4425 #if INCLUDE_CDS
4426 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4427 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4428 }
4429 #endif
4430
4431 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
4432
4433 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
4434 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
4435
4436 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
4437 InstanceKlass* k = vmClasses::Context_klass();
4438 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4439 }
4440
4441 #if INCLUDE_CDS
4442 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
4443 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4444 }
4445 #endif
4446
4447 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
4448 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
4449 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4450 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4451 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4452 return dep_ctx;
4453 }
4454
4455 // Support for java_security_AccessControlContext
4456
4457 int java_security_AccessControlContext::_context_offset;
4458 int java_security_AccessControlContext::_privilegedContext_offset;
4459 int java_security_AccessControlContext::_isPrivileged_offset;
4460 int java_security_AccessControlContext::_isAuthorized_offset;
4461
4462 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
4463 macro(_context_offset, k, "context", protectiondomain_signature, false); \
4464 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
4465 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
4466 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
4467
4468 void java_security_AccessControlContext::compute_offsets() {
4469 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
4470 InstanceKlass* k = vmClasses::AccessControlContext_klass();
4471 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4472 }
4473
4474 #if INCLUDE_CDS
4475 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
4476 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4477 }
4478 #endif
4479
4480 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
4481 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
4482 assert(_isAuthorized_offset != 0, "offsets should have been initialized");
4483 // Ensure klass is initialized
4484 vmClasses::AccessControlContext_klass()->initialize(CHECK_NULL);
4485 // Allocate result
4486 oop result = vmClasses::AccessControlContext_klass()->allocate_instance(CHECK_NULL);
4487 // Fill in values
4488 result->obj_field_put(_context_offset, context());
4489 result->obj_field_put(_privilegedContext_offset, privileged_context());
4490 result->bool_field_put(_isPrivileged_offset, isPrivileged);
4491 result->bool_field_put(_isAuthorized_offset, true);
4492 return result;
4493 }
4494
4495
4496 // Support for java_lang_ClassLoader
4497
4498 int java_lang_ClassLoader::_loader_data_offset;
4499 int java_lang_ClassLoader::_parallelCapable_offset;
4500 int java_lang_ClassLoader::_name_offset;
4501 int java_lang_ClassLoader::_nameAndId_offset;
4502 int java_lang_ClassLoader::_unnamedModule_offset;
4503 int java_lang_ClassLoader::_parent_offset;
4504
4505 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4506 assert(loader != nullptr, "loader must not be null");
4507 assert(oopDesc::is_oop(loader), "loader must be oop");
4508 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4509 }
4510
4511 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4512 assert(loader != nullptr, "loader must not be null");
4513 assert(oopDesc::is_oop(loader), "loader must be oop");
4514 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4515 }
4516
4517 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4518 assert(loader != nullptr, "loader must not be null");
4519 assert(oopDesc::is_oop(loader), "loader must be oop");
4520 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4521 }
4522
4523 #define CLASSLOADER_FIELDS_DO(macro) \
4524 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4525 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4526 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
4527 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4528 macro(_parent_offset, k1, "parent", classloader_signature, false)
4529
4530 void java_lang_ClassLoader::compute_offsets() {
4531 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4532 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4533
4534 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4535 }
4536
4537 #if INCLUDE_CDS
4538 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4539 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4540 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4541 }
4542 #endif
4543
4544 oop java_lang_ClassLoader::parent(oop loader) {
4545 assert(is_instance(loader), "loader must be oop");
4546 return loader->obj_field(_parent_offset);
4547 }
4548
4549 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4550 assert(is_instance(loader), "loader must be oop");
4551 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4552 }
4553
4554 // Returns the name field of this class loader. If the name field has not
4555 // been set, null will be returned.
4556 oop java_lang_ClassLoader::name(oop loader) {
4557 assert(is_instance(loader), "loader must be oop");
4558 return loader->obj_field(_name_offset);
4559 }
4560
4561 // Returns the nameAndId field of this class loader. The format is
4562 // as follows:
4563 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4564 // If the defining loader has no name then <qualified-class-name> @<id>
4565 // If built-in loader, then omit '@<id>' as there is only one instance.
4566 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4567 oop java_lang_ClassLoader::nameAndId(oop loader) {
4568 assert(is_instance(loader), "loader must be oop");
4569 return loader->obj_field(_nameAndId_offset);
4570 }
4571
4572 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4573 assert(is_instance(loader), "loader must be oop");
4574 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4575 oop acl = loader;
4576 debug_only(jint loop_count = 0);
4577 // This loop taken verbatim from ClassLoader.java:
4578 do {
4579 acl = parent(acl);
4580 if (cl == acl) {
4581 return true;
4582 }
4583 assert(++loop_count > 0, "loop_count overflow");
4584 } while (acl != nullptr);
4585 return false;
4586 }
4587
4588 bool java_lang_ClassLoader::is_instance(oop obj) {
4589 return obj != nullptr && is_subclass(obj->klass());
4590 }
4591
4592
4593 // For class loader classes, parallelCapable defined
4594 // based on non-null field
4595 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4596 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4597 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4598 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4599 }
4600
4601 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4602 // Fix for 4474172; see evaluation for more details
4603 loader = non_reflection_class_loader(loader);
4604
4605 oop cl = SystemDictionary::java_system_loader();
4606 while(cl != nullptr) {
4607 if (cl == loader) return true;
4608 cl = parent(cl);
4609 }
4610 return false;
4611 }
4612
4613 // Return true if this is one of the class loaders associated with
4614 // the generated bytecodes for reflection.
4615 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
4616 if (loader != nullptr) {
4617 Klass* delegating_cl_class = vmClasses::reflect_DelegatingClassLoader_klass();
4618 // This might be null in non-1.4 JDKs
4619 return (delegating_cl_class != nullptr && loader->is_a(delegating_cl_class));
4620 }
4621 return false;
4622 }
4623
4624 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4625 // See whether this is one of the class loaders associated with
4626 // the generated bytecodes for reflection, and if so, "magically"
4627 // delegate to its parent to prevent class loading from occurring
4628 // in places where applications using reflection didn't expect it.
4629 if (is_reflection_class_loader(loader)) {
4630 return parent(loader);
4631 }
4632 return loader;
4633 }
4634
4635 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4636 assert(is_instance(loader), "loader must be oop");
4637 return loader->obj_field(_unnamedModule_offset);
4638 }
4639
4640 // Support for java_lang_System
4641 //
4642
4643 int java_lang_System::_static_in_offset;
4644 int java_lang_System::_static_out_offset;
4645 int java_lang_System::_static_err_offset;
4646 int java_lang_System::_static_security_offset;
4647 int java_lang_System::_static_allow_security_offset;
4648 int java_lang_System::_static_never_offset;
4649
4650 #define SYSTEM_FIELDS_DO(macro) \
4651 macro(_static_in_offset, k, "in", input_stream_signature, true); \
4652 macro(_static_out_offset, k, "out", print_stream_signature, true); \
4653 macro(_static_err_offset, k, "err", print_stream_signature, true); \
4654 macro(_static_security_offset, k, "security", security_manager_signature, true); \
4655 macro(_static_allow_security_offset, k, "allowSecurityManager", int_signature, true); \
4656 macro(_static_never_offset, k, "NEVER", int_signature, true)
4657
4658 void java_lang_System::compute_offsets() {
4659 InstanceKlass* k = vmClasses::System_klass();
4660 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4661 }
4662
4663 // This field tells us that a security manager can never be installed so we
4664 // can completely skip populating the ProtectionDomainCacheTable.
4665 bool java_lang_System::allow_security_manager() {
4666 static int initialized = false;
4667 static bool allowed = true; // default
4668 if (!initialized) {
4669 oop base = vmClasses::System_klass()->static_field_base_raw();
4670 int never = base->int_field(_static_never_offset);
4671 allowed = (base->int_field(_static_allow_security_offset) != never);
4672 initialized = true;
4673 }
4674 return allowed;
4675 }
4676
4677 // This field tells us that a security manager is installed.
4678 bool java_lang_System::has_security_manager() {
4679 oop base = vmClasses::System_klass()->static_field_base_raw();
4680 return base->obj_field(_static_security_offset) != nullptr;
4681 }
4682
4683 #if INCLUDE_CDS
4684 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4685 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4686 }
4687 #endif
4688
4689 // Support for jdk_internal_misc_UnsafeConstants
4690 //
4691 class UnsafeConstantsFixup : public FieldClosure {
4692 private:
4693 int _address_size;
4694 int _page_size;
4695 bool _big_endian;
4696 bool _use_unaligned_access;
4697 int _data_cache_line_flush_size;
4698 public:
4699 UnsafeConstantsFixup() {
4700 // round up values for all static final fields
4701 _address_size = sizeof(void*);
4702 _page_size = (int)os::vm_page_size();
4703 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4704 _use_unaligned_access = UseUnalignedAccesses;
4705 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4706 }
4707
4708 void do_field(fieldDescriptor* fd) {
4709 oop mirror = fd->field_holder()->java_mirror();
4710 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4711 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4712 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4713 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4714 if (fd->name() == vmSymbols::address_size_name()) {
4715 mirror->int_field_put(fd->offset(), _address_size);
4716 } else if (fd->name() == vmSymbols::page_size_name()) {
4717 mirror->int_field_put(fd->offset(), _page_size);
4718 } else if (fd->name() == vmSymbols::big_endian_name()) {
4719 mirror->bool_field_put(fd->offset(), _big_endian);
4720 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4721 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4722 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4723 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4724 } else {
4725 assert(false, "unexpected UnsafeConstants field");
4726 }
4727 }
4728 };
4729
4730 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4731 UnsafeConstantsFixup fixup;
4732 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4733 }
4734
4735
4736 // java_lang_StackTraceElement
4737
4738 int java_lang_StackTraceElement::_methodName_offset;
4739 int java_lang_StackTraceElement::_fileName_offset;
4740 int java_lang_StackTraceElement::_lineNumber_offset;
4741 int java_lang_StackTraceElement::_moduleName_offset;
4742 int java_lang_StackTraceElement::_moduleVersion_offset;
4743 int java_lang_StackTraceElement::_classLoaderName_offset;
4744 int java_lang_StackTraceElement::_declaringClass_offset;
4745 int java_lang_StackTraceElement::_declaringClassObject_offset;
4746
4747 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4748 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4749 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4750 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
4751 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4752 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
4753 macro(_methodName_offset, k, "methodName", string_signature, false); \
4754 macro(_fileName_offset, k, "fileName", string_signature, false); \
4755 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
4756
4757 // Support for java_lang_StackTraceElement
4758 void java_lang_StackTraceElement::compute_offsets() {
4759 InstanceKlass* k = vmClasses::StackTraceElement_klass();
4760 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4761 }
4762
4763 #if INCLUDE_CDS
4764 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4765 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4766 }
4767 #endif
4768
4769 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4770 element->obj_field_put(_fileName_offset, value);
4771 }
4772
4773 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4774 element->obj_field_put(_declaringClass_offset, value);
4775 }
4776
4777 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4778 element->obj_field_put(_methodName_offset, value);
4779 }
4780
4781 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4782 element->int_field_put(_lineNumber_offset, value);
4783 }
4784
4785 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4786 element->obj_field_put(_moduleName_offset, value);
4787 }
4788
4789 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4790 element->obj_field_put(_moduleVersion_offset, value);
4791 }
4792
4793 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4794 element->obj_field_put(_classLoaderName_offset, value);
4795 }
4796
4797 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4798 element->obj_field_put(_declaringClassObject_offset, value);
4799 }
4800
4801
4802 // java_lang_AssertionStatusDirectives
4803
4804 int java_lang_AssertionStatusDirectives::_classes_offset;
4805 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
4806 int java_lang_AssertionStatusDirectives::_packages_offset;
4807 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
4808 int java_lang_AssertionStatusDirectives::_deflt_offset;
4809
4810 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4811 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4812 macro(_classes_offset, k, "classes", string_array_signature, false); \
4813 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4814 macro(_packages_offset, k, "packages", string_array_signature, false); \
4815 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4816 macro(_deflt_offset, k, "deflt", bool_signature, false)
4817
4818 void java_lang_AssertionStatusDirectives::compute_offsets() {
4819 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
4820 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4821 }
4822
4823 #if INCLUDE_CDS
4824 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4825 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4826 }
4827 #endif
4828
4829 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4830 o->obj_field_put(_classes_offset, val);
4831 }
4832
4833 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4834 o->obj_field_put(_classEnabled_offset, val);
4835 }
4836
4837 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4838 o->obj_field_put(_packages_offset, val);
4839 }
4840
4841 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4842 o->obj_field_put(_packageEnabled_offset, val);
4843 }
4844
4845 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4846 o->bool_field_put(_deflt_offset, val);
4847 }
4848
4849 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4850
4851 #define AOS_FIELDS_DO(macro) \
4852 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4853
4854 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4855 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4856 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4857 }
4858
4859 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4860 assert(_owner_offset != 0, "Must be initialized");
4861 return obj->obj_field(_owner_offset);
4862 }
4863
4864 #if INCLUDE_CDS
4865 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4866 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4867 }
4868 #endif
4869
4870 int vector_VectorPayload::_payload_offset;
4871
4872 #define VECTORPAYLOAD_FIELDS_DO(macro) \
4873 macro(_payload_offset, k, "payload", object_signature, false)
4874
4875 void vector_VectorPayload::compute_offsets() {
4876 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
4877 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4878 }
4879
4880 #if INCLUDE_CDS
4881 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
4882 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4883 }
4884 #endif
4885
4886 void vector_VectorPayload::set_payload(oop o, oop val) {
4887 o->obj_field_put(_payload_offset, val);
4888 }
4889
4890 bool vector_VectorPayload::is_instance(oop obj) {
4891 return obj != nullptr && is_subclass(obj->klass());
4892 }
4893
4894 int java_lang_Integer_IntegerCache::_static_cache_offset;
4895 int java_lang_Long_LongCache::_static_cache_offset;
4896 int java_lang_Character_CharacterCache::_static_cache_offset;
4897 int java_lang_Short_ShortCache::_static_cache_offset;
4898 int java_lang_Byte_ByteCache::_static_cache_offset;
4899
4900 #define INTEGER_CACHE_FIELDS_DO(macro) \
4901 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
4902
4903 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
4904 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
4905 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4906 }
4907
4908 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
4909 oop base = ik->static_field_base_raw();
4910 return objArrayOop(base->obj_field(_static_cache_offset));
4911 }
4912
4913 Symbol* java_lang_Integer_IntegerCache::symbol() {
4914 return vmSymbols::java_lang_Integer_IntegerCache();
4915 }
4916
4917 #if INCLUDE_CDS
4918 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
4919 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4920 }
4921 #endif
4922 #undef INTEGER_CACHE_FIELDS_DO
4923
4924 jint java_lang_Integer::value(oop obj) {
4925 jvalue v;
4926 java_lang_boxing_object::get_value(obj, &v);
4927 return v.i;
4928 }
4929
4930 #define LONG_CACHE_FIELDS_DO(macro) \
4931 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
4932
4933 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
4934 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
4935 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4936 }
4937
4938 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
4939 oop base = ik->static_field_base_raw();
4940 return objArrayOop(base->obj_field(_static_cache_offset));
4941 }
4942
4943 Symbol* java_lang_Long_LongCache::symbol() {
4944 return vmSymbols::java_lang_Long_LongCache();
4945 }
4946
4947 #if INCLUDE_CDS
4948 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
4949 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4950 }
4951 #endif
4952 #undef LONG_CACHE_FIELDS_DO
4953
4954 jlong java_lang_Long::value(oop obj) {
4955 jvalue v;
4956 java_lang_boxing_object::get_value(obj, &v);
4957 return v.j;
4958 }
4959
4960 #define CHARACTER_CACHE_FIELDS_DO(macro) \
4961 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
4962
4963 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
4964 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
4965 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4966 }
4967
4968 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
4969 oop base = ik->static_field_base_raw();
4970 return objArrayOop(base->obj_field(_static_cache_offset));
4971 }
4972
4973 Symbol* java_lang_Character_CharacterCache::symbol() {
4974 return vmSymbols::java_lang_Character_CharacterCache();
4975 }
4976
4977 #if INCLUDE_CDS
4978 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
4979 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4980 }
4981 #endif
4982 #undef CHARACTER_CACHE_FIELDS_DO
4983
4984 jchar java_lang_Character::value(oop obj) {
4985 jvalue v;
4986 java_lang_boxing_object::get_value(obj, &v);
4987 return v.c;
4988 }
4989
4990 #define SHORT_CACHE_FIELDS_DO(macro) \
4991 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
4992
4993 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
4994 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
4995 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4996 }
4997
4998 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
4999 oop base = ik->static_field_base_raw();
5000 return objArrayOop(base->obj_field(_static_cache_offset));
5001 }
5002
5003 Symbol* java_lang_Short_ShortCache::symbol() {
5004 return vmSymbols::java_lang_Short_ShortCache();
5005 }
5006
5007 #if INCLUDE_CDS
5008 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5009 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5010 }
5011 #endif
5012 #undef SHORT_CACHE_FIELDS_DO
5013
5014 jshort java_lang_Short::value(oop obj) {
5015 jvalue v;
5016 java_lang_boxing_object::get_value(obj, &v);
5017 return v.s;
5018 }
5019
5020 #define BYTE_CACHE_FIELDS_DO(macro) \
5021 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5022
5023 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5024 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5025 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5026 }
5027
5028 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5029 oop base = ik->static_field_base_raw();
5030 return objArrayOop(base->obj_field(_static_cache_offset));
5031 }
5032
5033 Symbol* java_lang_Byte_ByteCache::symbol() {
5034 return vmSymbols::java_lang_Byte_ByteCache();
5035 }
5036
5037 #if INCLUDE_CDS
5038 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5039 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5040 }
5041 #endif
5042 #undef BYTE_CACHE_FIELDS_DO
5043
5044 jbyte java_lang_Byte::value(oop obj) {
5045 jvalue v;
5046 java_lang_boxing_object::get_value(obj, &v);
5047 return v.b;
5048 }
5049
5050 int java_lang_Boolean::_static_TRUE_offset;
5051 int java_lang_Boolean::_static_FALSE_offset;
5052
5053 #define BOOLEAN_FIELDS_DO(macro) \
5054 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5055 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5056
5057
5058 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5059 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5060 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5061 }
5062
5063 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5064 oop base = ik->static_field_base_raw();
5065 return base->obj_field(_static_TRUE_offset);
5066 }
5067
5068 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5069 oop base = ik->static_field_base_raw();
5070 return base->obj_field(_static_FALSE_offset);
5071 }
5072
5073 Symbol* java_lang_Boolean::symbol() {
5074 return vmSymbols::java_lang_Boolean();
5075 }
5076
5077 #if INCLUDE_CDS
5078 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5079 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5080 }
5081 #endif
5082 #undef BOOLEAN_CACHE_FIELDS_DO
5083
5084 jboolean java_lang_Boolean::value(oop obj) {
5085 jvalue v;
5086 java_lang_boxing_object::get_value(obj, &v);
5087 return v.z;
5088 }
5089
5090 // java_lang_reflect_RecordComponent
5091
5092 int java_lang_reflect_RecordComponent::_clazz_offset;
5093 int java_lang_reflect_RecordComponent::_name_offset;
5094 int java_lang_reflect_RecordComponent::_type_offset;
5095 int java_lang_reflect_RecordComponent::_accessor_offset;
5096 int java_lang_reflect_RecordComponent::_signature_offset;
5097 int java_lang_reflect_RecordComponent::_annotations_offset;
5098 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5099
5100 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5101 macro(_clazz_offset, k, "clazz", class_signature, false); \
5102 macro(_name_offset, k, "name", string_signature, false); \
5103 macro(_type_offset, k, "type", class_signature, false); \
5104 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5105 macro(_signature_offset, k, "signature", string_signature, false); \
5106 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5107 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5108
5109 // Support for java_lang_reflect_RecordComponent
5110 void java_lang_reflect_RecordComponent::compute_offsets() {
5111 InstanceKlass* k = vmClasses::RecordComponent_klass();
5112 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5113 }
5114
5115 #if INCLUDE_CDS
5116 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5117 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5118 }
5119 #endif
5120
5121 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5122 element->obj_field_put(_clazz_offset, value);
5123 }
5124
5125 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5126 element->obj_field_put(_name_offset, value);
5127 }
5128
5129 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5130 element->obj_field_put(_type_offset, value);
5131 }
5132
5133 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5134 element->obj_field_put(_accessor_offset, value);
5135 }
5136
5137 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5138 element->obj_field_put(_signature_offset, value);
5139 }
5140
5141 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5142 element->obj_field_put(_annotations_offset, value);
5143 }
5144
5145 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5146 element->obj_field_put(_typeAnnotations_offset, value);
5147 }
5148
5149 // java_lang_InternalError
5150 int java_lang_InternalError::_during_unsafe_access_offset;
5151
5152 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5153 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5154 }
5155
5156 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5157 return internal_error->bool_field(_during_unsafe_access_offset);
5158 }
5159
5160 void java_lang_InternalError::compute_offsets() {
5161 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5162 }
5163
5164 #if INCLUDE_CDS
5165 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5166 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5167 }
5168 #endif
5169
5170 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5171 f(java_lang_Class) \
5172 f(java_lang_String) \
5173 f(java_lang_ref_Reference) \
5174 //end
5175
5176 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5177 f(java_lang_System) \
5178 f(java_lang_ClassLoader) \
5179 f(java_lang_Throwable) \
5180 f(java_lang_Thread) \
5181 f(java_lang_Thread_FieldHolder) \
5182 f(java_lang_Thread_Constants) \
5183 f(java_lang_ThreadGroup) \
5184 f(java_lang_VirtualThread) \
5185 f(java_lang_InternalError) \
5186 f(java_lang_AssertionStatusDirectives) \
5187 f(java_lang_ref_SoftReference) \
5188 f(java_lang_invoke_MethodHandle) \
5189 f(java_lang_invoke_DirectMethodHandle) \
5190 f(java_lang_invoke_MemberName) \
5191 f(java_lang_invoke_ResolvedMethodName) \
5192 f(java_lang_invoke_LambdaForm) \
5193 f(java_lang_invoke_MethodType) \
5194 f(java_lang_invoke_CallSite) \
5195 f(java_lang_invoke_ConstantCallSite) \
5196 f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \
5197 f(java_security_AccessControlContext) \
5198 f(java_lang_reflect_AccessibleObject) \
5199 f(java_lang_reflect_Method) \
5200 f(java_lang_reflect_Constructor) \
5201 f(java_lang_reflect_Field) \
5202 f(java_lang_reflect_RecordComponent) \
5203 f(reflect_ConstantPool) \
5204 f(reflect_UnsafeStaticFieldAccessorImpl) \
5205 f(java_lang_reflect_Parameter) \
5206 f(java_lang_Module) \
5207 f(java_lang_StackTraceElement) \
5208 f(java_lang_StackFrameInfo) \
5209 f(java_lang_LiveStackFrameInfo) \
5210 f(jdk_internal_vm_ContinuationScope) \
5211 f(jdk_internal_vm_Continuation) \
5212 f(jdk_internal_vm_StackChunk) \
5213 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5214 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5215 f(jdk_internal_foreign_abi_ABIDescriptor) \
5216 f(jdk_internal_foreign_abi_VMStorage) \
5217 f(jdk_internal_foreign_abi_CallConv) \
5218 f(jdk_internal_misc_UnsafeConstants) \
5219 f(java_lang_boxing_object) \
5220 f(vector_VectorPayload) \
5221 //end
5222
5223 #define BASIC_JAVA_CLASSES_DO(f) \
5224 BASIC_JAVA_CLASSES_DO_PART1(f) \
5225 BASIC_JAVA_CLASSES_DO_PART2(f)
5226
5227 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5228
5229 // Compute field offsets of all the classes in this file
5230 void JavaClasses::compute_offsets() {
5231 if (UseSharedSpaces) {
5232 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5233 JvmtiExport::has_early_class_hook_env()),
5234 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5235 // None of the classes used by the rest of this function can be replaced by
5236 // JVMTI ClassFileLoadHook.
5237 // We are safe to use the archived offsets, which have already been restored
5238 // by JavaClasses::serialize_offsets, without computing the offsets again.
5239 return;
5240 }
5241
5242 // We have already called the compute_offsets() of the
5243 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5244 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5245 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5246 }
5247
5248 #if INCLUDE_CDS
5249 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5250
5251 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5252 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5253 }
5254 #endif
5255
5256 #if INCLUDE_CDS_JAVA_HEAP
5257 bool JavaClasses::is_supported_for_archiving(oop obj) {
5258 Klass* klass = obj->klass();
5259
5260 if (klass == vmClasses::ClassLoader_klass() || // ClassLoader::loader_data is malloc'ed.
5261 // The next 3 classes are used to implement java.lang.invoke, and are not used directly in
5262 // regular Java code. The implementation of java.lang.invoke uses generated hidden classes
5263 // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS.
5264 // So for now we cannot not support these classes for archiving.
5265 //
5266 // These objects typically are not referenced by static fields, but rather by resolved
5267 // constant pool entries, so excluding them shouldn't affect the archiving of static fields.
5268 klass == vmClasses::ResolvedMethodName_klass() ||
5269 klass == vmClasses::MemberName_klass() ||
5270 klass == vmClasses::Context_klass() ||
5271 // It's problematic to archive Reference objects. One of the reasons is that
5272 // Reference::discovered may pull in unwanted objects (see JDK-8284336)
5273 klass->is_subclass_of(vmClasses::Reference_klass())) {
5274 return false;
5275 }
5276
5277 return true;
5278 }
5279 #endif
5280
5281 #ifndef PRODUCT
5282
5283 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5284
5285 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5286 const char* field_sig) {
5287 EXCEPTION_MARK;
5288 fieldDescriptor fd;
5289 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5290 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5291 InstanceKlass* ik = InstanceKlass::cast(k);
5292 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5293 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5294 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5295 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5296 return false;
5297 }
5298 if (fd.is_static()) {
5299 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5300 return false;
5301 }
5302 if (fd.offset() == deserialized_offset ) {
5303 return true;
5304 } else {
5305 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5306 klass_name, field_name, deserialized_offset, fd.offset());
5307 return false;
5308 }
5309 }
5310
5311 void JavaClasses::check_offsets() {
5312 bool valid = true;
5313
5314 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5315 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5316
5317 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5318 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5319
5320 // Boxed primitive objects (java_lang_boxing_object)
5321
5322 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
5323 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5324 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
5325 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5326 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
5327 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
5328 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
5329 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5330
5331 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5332 }
5333
5334 #endif // PRODUCT
5335
5336 int InjectedField::compute_offset() {
5337 InstanceKlass* ik = InstanceKlass::cast(klass());
5338 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5339 if (!may_be_java && !fs.field_flags().is_injected()) {
5340 // Only look at injected fields
5341 continue;
5342 }
5343 if (fs.name() == name() && fs.signature() == signature()) {
5344 return fs.offset();
5345 }
5346 }
5347 ResourceMark rm;
5348 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)" : "");
5349 #ifndef PRODUCT
5350 ik->print();
5351 tty->print_cr("all fields:");
5352 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5353 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
5354 }
5355 #endif //PRODUCT
5356 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5357 return -1;
5358 }
5359
5360 void javaClasses_init() {
5361 JavaClasses::compute_offsets();
5362 JavaClasses::check_offsets();
5363 FilteredFieldsMap::initialize(); // must be done after computing offsets.
5364 }