1 /* 2 * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "cds/aotReferenceObjSupport.hpp" 26 #include "cds/archiveBuilder.hpp" 27 #include "cds/archiveHeapLoader.hpp" 28 #include "cds/cdsConfig.hpp" 29 #include "cds/heapShared.hpp" 30 #include "cds/metaspaceShared.hpp" 31 #include "classfile/altHashing.hpp" 32 #include "classfile/classLoaderData.inline.hpp" 33 #include "classfile/javaClasses.inline.hpp" 34 #include "classfile/javaClassesImpl.hpp" 35 #include "classfile/javaThreadStatus.hpp" 36 #include "classfile/moduleEntry.hpp" 37 #include "classfile/stringTable.hpp" 38 #include "classfile/symbolTable.hpp" 39 #include "classfile/systemDictionary.hpp" 40 #include "classfile/vmClasses.hpp" 41 #include "classfile/vmSymbols.hpp" 42 #include "code/debugInfo.hpp" 43 #include "code/dependencyContext.hpp" 44 #include "code/pcDesc.hpp" 45 #include "gc/shared/collectedHeap.inline.hpp" 46 #include "interpreter/interpreter.hpp" 47 #include "interpreter/linkResolver.hpp" 48 #include "jvm.h" 49 #include "logging/log.hpp" 50 #include "logging/logStream.hpp" 51 #include "memory/oopFactory.hpp" 52 #include "memory/resourceArea.hpp" 53 #include "memory/universe.hpp" 54 #include "oops/fieldInfo.hpp" 55 #include "oops/fieldStreams.inline.hpp" 56 #include "oops/instanceKlass.inline.hpp" 57 #include "oops/instanceMirrorKlass.hpp" 58 #include "oops/klass.hpp" 59 #include "oops/klass.inline.hpp" 60 #include "oops/method.inline.hpp" 61 #include "oops/objArrayKlass.hpp" 62 #include "oops/objArrayOop.inline.hpp" 63 #include "oops/oopCast.inline.hpp" 64 #include "oops/oop.inline.hpp" 65 #include "oops/symbol.hpp" 66 #include "oops/recordComponent.hpp" 67 #include "oops/typeArrayOop.inline.hpp" 68 #include "prims/jvmtiExport.hpp" 69 #include "prims/jvmtiThreadState.hpp" // for JvmtiVTMSTransitionDisabler 70 #include "prims/methodHandles.hpp" 71 #include "prims/resolvedMethodTable.hpp" 72 #include "runtime/continuationEntry.inline.hpp" 73 #include "runtime/continuationJavaClasses.inline.hpp" 74 #include "runtime/fieldDescriptor.inline.hpp" 75 #include "runtime/frame.inline.hpp" 76 #include "runtime/handles.inline.hpp" 77 #include "runtime/handshake.hpp" 78 #include "runtime/init.hpp" 79 #include "runtime/interfaceSupport.inline.hpp" 80 #include "runtime/java.hpp" 81 #include "runtime/javaCalls.hpp" 82 #include "runtime/javaThread.hpp" 83 #include "runtime/jniHandles.inline.hpp" 84 #include "runtime/reflectionUtils.hpp" 85 #include "runtime/safepoint.hpp" 86 #include "runtime/safepointVerifiers.hpp" 87 #include "runtime/synchronizer.inline.hpp" 88 #include "runtime/threadSMR.hpp" 89 #include "runtime/vframe.inline.hpp" 90 #include "runtime/vm_version.hpp" 91 #include "utilities/align.hpp" 92 #include "utilities/globalDefinitions.hpp" 93 #include "utilities/growableArray.hpp" 94 #include "utilities/preserveException.hpp" 95 #include "utilities/utf8.hpp" 96 #if INCLUDE_JVMCI 97 #include "jvmci/jvmciJavaClasses.hpp" 98 #endif 99 100 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 101 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 102 103 InjectedField JavaClasses::_injected_fields[] = { 104 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 105 }; 106 107 // Register native methods of Object 108 void java_lang_Object::register_natives(TRAPS) { 109 InstanceKlass* obj = vmClasses::Object_klass(); 110 Method::register_native(obj, vmSymbols::hashCode_name(), 111 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK); 112 Method::register_native(obj, vmSymbols::wait_name(), 113 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK); 114 Method::register_native(obj, vmSymbols::notify_name(), 115 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK); 116 Method::register_native(obj, vmSymbols::notifyAll_name(), 117 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK); 118 Method::register_native(obj, vmSymbols::clone_name(), 119 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD); 120 } 121 122 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 123 return _injected_fields[(int)id].compute_offset(); 124 } 125 126 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 127 *field_count = 0; 128 129 vmSymbolID sid = vmSymbols::find_sid(class_name); 130 if (sid == vmSymbolID::NO_SID) { 131 // Only well known classes can inject fields 132 return nullptr; 133 } 134 135 int count = 0; 136 int start = -1; 137 138 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 139 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \ 140 count++; \ 141 if (start == -1) { \ 142 start = (int)InjectedFieldID::klass##_##name##_enum; \ 143 } \ 144 } 145 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 146 #undef LOOKUP_INJECTED_FIELD 147 148 if (start != -1) { 149 *field_count = count; 150 return _injected_fields + start; 151 } 152 return nullptr; 153 } 154 155 156 // Helpful routine for computing field offsets at run time rather than hardcoding them 157 // Finds local fields only, including static fields. Static field offsets are from the 158 // beginning of the mirror. 159 void JavaClasses::compute_offset(int &dest_offset, 160 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol, 161 bool is_static) { 162 fieldDescriptor fd; 163 if (ik == nullptr) { 164 ResourceMark rm; 165 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string()); 166 vm_exit_during_initialization("Invalid layout of well-known class"); 167 } 168 169 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) { 170 ResourceMark rm; 171 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(), 172 name_symbol->as_C_string(), signature_symbol->as_C_string()); 173 #ifndef PRODUCT 174 // Prints all fields and offsets 175 Log(class) lt; 176 LogStream ls(lt.error()); 177 ik->print_on(&ls); 178 #endif //PRODUCT 179 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 180 } 181 dest_offset = fd.offset(); 182 } 183 184 // Overloading to pass name as a string. 185 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik, 186 const char* name_string, Symbol* signature_symbol, 187 bool is_static) { 188 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string)); 189 if (name == nullptr) { 190 ResourceMark rm; 191 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string); 192 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name()); 193 } 194 compute_offset(dest_offset, ik, name, signature_symbol, is_static); 195 } 196 197 // java_lang_String 198 199 int java_lang_String::_value_offset; 200 int java_lang_String::_hash_offset; 201 int java_lang_String::_hashIsZero_offset; 202 int java_lang_String::_coder_offset; 203 int java_lang_String::_flags_offset; 204 205 bool java_lang_String::_initialized; 206 207 208 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) { 209 uint8_t* addr = flags_addr(java_string); 210 uint8_t value = Atomic::load(addr); 211 while ((value & flag_mask) == 0) { 212 uint8_t old_value = value; 213 value |= flag_mask; 214 value = Atomic::cmpxchg(addr, old_value, value); 215 if (value == old_value) return false; // Flag bit changed from 0 to 1. 216 } 217 return true; // Flag bit is already 1. 218 } 219 220 #define STRING_FIELDS_DO(macro) \ 221 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \ 222 macro(_hash_offset, k, "hash", int_signature, false); \ 223 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \ 224 macro(_coder_offset, k, "coder", byte_signature, false); 225 226 void java_lang_String::compute_offsets() { 227 if (_initialized) { 228 return; 229 } 230 231 InstanceKlass* k = vmClasses::String_klass(); 232 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 233 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 234 235 _initialized = true; 236 } 237 238 #if INCLUDE_CDS 239 void java_lang_String::serialize_offsets(SerializeClosure* f) { 240 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 241 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 242 f->do_bool(&_initialized); 243 } 244 #endif 245 246 class CompactStringsFixup : public FieldClosure { 247 private: 248 bool _value; 249 250 public: 251 CompactStringsFixup(bool value) : _value(value) {} 252 253 void do_field(fieldDescriptor* fd) { 254 if (fd->name() == vmSymbols::compact_strings_name()) { 255 oop mirror = fd->field_holder()->java_mirror(); 256 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String"); 257 assert(mirror != nullptr, "String must have mirror already"); 258 mirror->bool_field_put(fd->offset(), _value); 259 } 260 } 261 }; 262 263 void java_lang_String::set_compact_strings(bool value) { 264 CompactStringsFixup fix(value); 265 vmClasses::String_klass()->do_local_static_fields(&fix); 266 } 267 268 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 269 assert(_initialized, "Must be initialized"); 270 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 271 272 // Create the String object first, so there's a chance that the String 273 // and the char array it points to end up in the same cache line. 274 oop obj; 275 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH); 276 277 // Create the char array. The String object must be handlized here 278 // because GC can happen as a result of the allocation attempt. 279 Handle h_obj(THREAD, obj); 280 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 281 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 282 283 // Point the String at the char array 284 obj = h_obj(); 285 set_value(obj, buffer); 286 // No need to zero the offset, allocation zero'ed the entire String object 287 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 288 return h_obj; 289 } 290 291 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) { 292 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 293 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 294 typeArrayOop buffer = value(h_obj()); 295 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 296 if (is_latin1) { 297 for (int index = 0; index < length; index++) { 298 buffer->byte_at_put(index, (jbyte)unicode[index]); 299 } 300 } else { 301 for (int index = 0; index < length; index++) { 302 buffer->char_at_put(index, unicode[index]); 303 } 304 } 305 306 #ifdef ASSERT 307 { 308 ResourceMark rm; 309 size_t utf8_len = static_cast<size_t>(length); 310 char* expected = UNICODE::as_utf8(unicode, utf8_len); 311 char* actual = as_utf8_string(h_obj()); 312 if (strcmp(expected, actual) != 0) { 313 fatal("Unicode conversion failure: %s --> %s", expected, actual); 314 } 315 } 316 #endif 317 318 return h_obj; 319 } 320 321 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) { 322 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL); 323 return h_obj(); 324 } 325 326 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 327 if (utf8_str == nullptr) { 328 return Handle(); 329 } 330 bool has_multibyte, is_latin1; 331 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 332 if (!CompactStrings) { 333 has_multibyte = true; 334 is_latin1 = false; 335 } 336 337 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 338 if (length > 0) { 339 if (!has_multibyte) { 340 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 341 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 342 } else if (is_latin1) { 343 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 344 } else { 345 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 346 } 347 } 348 349 #ifdef ASSERT 350 // This check is too strict when the input string is not a valid UTF8. 351 // For example, it may be created with arbitrary content via jni_NewStringUTF. 352 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, strlen(utf8_str), /*version_leq_47*/false)) { 353 ResourceMark rm; 354 const char* expected = utf8_str; 355 char* actual = as_utf8_string(h_obj()); 356 if (strcmp(expected, actual) != 0) { 357 fatal("String conversion failure: %s --> %s", expected, actual); 358 } 359 } 360 #endif 361 362 return h_obj; 363 } 364 365 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 366 Handle h_obj = create_from_str(utf8_str, CHECK_NULL); 367 return h_obj(); 368 } 369 370 Handle java_lang_String::create_from_symbol(const Symbol* symbol, TRAPS) { 371 const char* utf8_str = (char*)symbol->bytes(); 372 int utf8_len = symbol->utf8_length(); 373 374 bool has_multibyte, is_latin1; 375 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 376 if (!CompactStrings) { 377 has_multibyte = true; 378 is_latin1 = false; 379 } 380 381 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 382 if (length > 0) { 383 if (!has_multibyte) { 384 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 385 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 386 } else if (is_latin1) { 387 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 388 } else { 389 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 390 } 391 } 392 393 #ifdef ASSERT 394 // This check is too strict on older classfile versions 395 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, utf8_len, /*version_leq_47*/false)) 396 { 397 ResourceMark rm; 398 const char* expected = symbol->as_utf8(); 399 char* actual = as_utf8_string(h_obj()); 400 if (strncmp(expected, actual, utf8_len) != 0) { 401 fatal("Symbol conversion failure: %s --> %s", expected, actual); 402 } 403 } 404 #endif 405 406 return h_obj; 407 } 408 409 // Converts a C string to a Java String based on current encoding 410 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 411 assert(str != nullptr, "bad arguments"); 412 413 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *); 414 static to_java_string_fn_t _to_java_string_fn = nullptr; 415 416 if (_to_java_string_fn == nullptr) { 417 void *lib_handle = os::native_java_library(); 418 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform")); 419 if (_to_java_string_fn == nullptr) { 420 fatal("JNU_NewStringPlatform missing"); 421 } 422 } 423 424 jstring js = nullptr; 425 { 426 JavaThread* thread = THREAD; 427 HandleMark hm(thread); 428 ThreadToNativeFromVM ttn(thread); 429 js = (_to_java_string_fn)(thread->jni_environment(), str); 430 } 431 432 Handle native_platform_string(THREAD, JNIHandles::resolve(js)); 433 JNIHandles::destroy_local(js); // destroy local JNIHandle. 434 return native_platform_string; 435 } 436 437 // Converts a Java String to a native C string that can be used for 438 // native OS calls. 439 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 440 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 441 static to_platform_string_fn_t _to_platform_string_fn = nullptr; 442 443 if (_to_platform_string_fn == nullptr) { 444 void *lib_handle = os::native_java_library(); 445 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 446 if (_to_platform_string_fn == nullptr) { 447 fatal("GetStringPlatformChars missing"); 448 } 449 } 450 451 char *native_platform_string; 452 jstring js; 453 { JavaThread* thread = THREAD; 454 js = (jstring) JNIHandles::make_local(thread, java_string()); 455 HandleMark hm(thread); 456 ThreadToNativeFromVM ttn(thread); 457 JNIEnv *env = thread->jni_environment(); 458 bool is_copy; 459 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 460 assert(is_copy == JNI_TRUE, "is_copy value changed"); 461 } 462 463 // Uses a store barrier and therefore needs to be in vm state 464 JNIHandles::destroy_local(js); 465 466 return native_platform_string; 467 } 468 469 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) { 470 ResourceMark rm(THREAD); 471 return create_from_str(java_name->as_klass_external_name(), THREAD); 472 } 473 474 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 475 jchar* result = as_unicode_string_or_null(java_string, length); 476 if (result == nullptr) { 477 THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 478 } 479 return result; 480 } 481 482 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) { 483 typeArrayOop value = java_lang_String::value(java_string); 484 length = java_lang_String::length(java_string, value); 485 bool is_latin1 = java_lang_String::is_latin1(java_string); 486 487 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 488 if (result != nullptr) { 489 if (!is_latin1) { 490 for (int index = 0; index < length; index++) { 491 result[index] = value->char_at(index); 492 } 493 } else { 494 for (int index = 0; index < length; index++) { 495 result[index] = ((jchar) value->byte_at(index)) & 0xff; 496 } 497 } 498 } 499 return result; 500 } 501 502 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) { 503 // The hash and hashIsZero fields are subject to a benign data race, 504 // making it crucial to ensure that any observable result of the 505 // calculation in this method stays correct under any possible read of 506 // these fields. Necessary restrictions to allow this to be correct 507 // without explicit memory fences or similar concurrency primitives is 508 // that we can ever only write to one of these two fields for a given 509 // String instance, and that the computation is idempotent and derived 510 // from immutable state 511 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized"); 512 if (java_lang_String::hash_is_set(java_string)) { 513 return java_string->int_field(_hash_offset); 514 } 515 516 typeArrayOop value = java_lang_String::value(java_string); 517 int length = java_lang_String::length(java_string, value); 518 bool is_latin1 = java_lang_String::is_latin1(java_string); 519 520 unsigned int hash = 0; 521 if (length > 0) { 522 if (is_latin1) { 523 hash = java_lang_String::hash_code(value->byte_at_addr(0), length); 524 } else { 525 hash = java_lang_String::hash_code(value->char_at_addr(0), length); 526 } 527 } 528 529 if (update) { 530 if (hash != 0) { 531 java_string->int_field_put(_hash_offset, hash); 532 } else { 533 java_string->bool_field_put(_hashIsZero_offset, true); 534 } 535 } 536 return hash; 537 } 538 539 unsigned int java_lang_String::hash_code(oop java_string) { 540 return hash_code_impl(java_string, /*update=*/true); 541 } 542 543 unsigned int java_lang_String::hash_code_noupdate(oop java_string) { 544 return hash_code_impl(java_string, /*update=*/false); 545 } 546 547 548 char* java_lang_String::as_quoted_ascii(oop java_string) { 549 typeArrayOop value = java_lang_String::value(java_string); 550 int length = java_lang_String::length(java_string, value); 551 bool is_latin1 = java_lang_String::is_latin1(java_string); 552 553 if (length == 0) return nullptr; 554 555 char* result; 556 size_t result_length; 557 if (!is_latin1) { 558 jchar* base = value->char_at_addr(0); 559 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 560 result = NEW_RESOURCE_ARRAY(char, result_length); 561 UNICODE::as_quoted_ascii(base, length, result, result_length); 562 } else { 563 jbyte* base = value->byte_at_addr(0); 564 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 565 result = NEW_RESOURCE_ARRAY(char, result_length); 566 UNICODE::as_quoted_ascii(base, length, result, result_length); 567 } 568 assert(result_length >= (size_t)length + 1, "must not be shorter"); 569 assert(result_length == strlen(result) + 1, "must match"); 570 return result; 571 } 572 573 Symbol* java_lang_String::as_symbol(oop java_string) { 574 typeArrayOop value = java_lang_String::value(java_string); 575 int length = java_lang_String::length(java_string, value); 576 bool is_latin1 = java_lang_String::is_latin1(java_string); 577 if (!is_latin1) { 578 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0); 579 Symbol* sym = SymbolTable::new_symbol(base, length); 580 return sym; 581 } else { 582 ResourceMark rm; 583 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 584 size_t utf8_len = static_cast<size_t>(length); 585 const char* base = UNICODE::as_utf8(position, utf8_len); 586 Symbol* sym = SymbolTable::new_symbol(base, checked_cast<int>(utf8_len)); 587 return sym; 588 } 589 } 590 591 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 592 typeArrayOop value = java_lang_String::value(java_string); 593 int length = java_lang_String::length(java_string, value); 594 bool is_latin1 = java_lang_String::is_latin1(java_string); 595 if (!is_latin1) { 596 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0); 597 return SymbolTable::probe_unicode(base, length); 598 } else { 599 ResourceMark rm; 600 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 601 size_t utf8_len = static_cast<size_t>(length); 602 const char* base = UNICODE::as_utf8(position, utf8_len); 603 return SymbolTable::probe(base, checked_cast<int>(utf8_len)); 604 } 605 } 606 607 size_t java_lang_String::utf8_length(oop java_string, typeArrayOop value) { 608 assert(value_equals(value, java_lang_String::value(java_string)), 609 "value must be same as java_lang_String::value(java_string)"); 610 int length = java_lang_String::length(java_string, value); 611 if (length == 0) { 612 return 0; 613 } 614 if (!java_lang_String::is_latin1(java_string)) { 615 return UNICODE::utf8_length(value->char_at_addr(0), length); 616 } else { 617 return UNICODE::utf8_length(value->byte_at_addr(0), length); 618 } 619 } 620 621 size_t java_lang_String::utf8_length(oop java_string) { 622 typeArrayOop value = java_lang_String::value(java_string); 623 return utf8_length(java_string, value); 624 } 625 626 int java_lang_String::utf8_length_as_int(oop java_string) { 627 typeArrayOop value = java_lang_String::value(java_string); 628 return utf8_length_as_int(java_string, value); 629 } 630 631 int java_lang_String::utf8_length_as_int(oop java_string, typeArrayOop value) { 632 assert(value_equals(value, java_lang_String::value(java_string)), 633 "value must be same as java_lang_String::value(java_string)"); 634 int length = java_lang_String::length(java_string, value); 635 if (length == 0) { 636 return 0; 637 } 638 if (!java_lang_String::is_latin1(java_string)) { 639 return UNICODE::utf8_length_as_int(value->char_at_addr(0), length); 640 } else { 641 return UNICODE::utf8_length_as_int(value->byte_at_addr(0), length); 642 } 643 } 644 645 char* java_lang_String::as_utf8_string(oop java_string) { 646 size_t length; 647 return as_utf8_string(java_string, length); 648 } 649 650 char* java_lang_String::as_utf8_string(oop java_string, size_t& length) { 651 typeArrayOop value = java_lang_String::value(java_string); 652 // `length` is used as the incoming number of characters to 653 // convert, and then set as the number of bytes in the UTF8 sequence. 654 length = java_lang_String::length(java_string, value); 655 bool is_latin1 = java_lang_String::is_latin1(java_string); 656 if (!is_latin1) { 657 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0); 658 return UNICODE::as_utf8(position, length); 659 } else { 660 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 661 return UNICODE::as_utf8(position, length); 662 } 663 } 664 665 // Uses a provided buffer if it's sufficiently large, otherwise allocates 666 // a resource array to fit 667 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& utf8_len) { 668 typeArrayOop value = java_lang_String::value(java_string); 669 int len = java_lang_String::length(java_string, value); 670 bool is_latin1 = java_lang_String::is_latin1(java_string); 671 if (!is_latin1) { 672 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0); 673 utf8_len = UNICODE::utf8_length(position, len); 674 if (utf8_len >= buflen) { 675 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 676 } 677 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 678 } else { 679 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0); 680 utf8_len = UNICODE::utf8_length(position, len); 681 if (utf8_len >= buflen) { 682 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 683 } 684 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 685 } 686 } 687 688 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen) { 689 assert(value_equals(value, java_lang_String::value(java_string)), 690 "value must be same as java_lang_String::value(java_string)"); 691 int length = java_lang_String::length(java_string, value); 692 bool is_latin1 = java_lang_String::is_latin1(java_string); 693 if (!is_latin1) { 694 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0); 695 return UNICODE::as_utf8(position, length, buf, buflen); 696 } else { 697 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 698 return UNICODE::as_utf8(position, length, buf, buflen); 699 } 700 } 701 702 char* java_lang_String::as_utf8_string(oop java_string, char* buf, size_t buflen) { 703 typeArrayOop value = java_lang_String::value(java_string); 704 return as_utf8_string(java_string, value, buf, buflen); 705 } 706 707 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 708 // `length` is used as the incoming number of characters to 709 // convert, and then set as the number of bytes in the UTF8 sequence. 710 size_t length = static_cast<size_t>(len); 711 typeArrayOop value = java_lang_String::value(java_string); 712 bool is_latin1 = java_lang_String::is_latin1(java_string); 713 assert(start + len <= java_lang_String::length(java_string), "just checking"); 714 if (!is_latin1) { 715 jchar* position = value->char_at_addr(start); 716 return UNICODE::as_utf8(position, length); 717 } else { 718 jbyte* position = value->byte_at_addr(start); 719 return UNICODE::as_utf8(position, length); 720 } 721 } 722 723 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen) { 724 assert(value_equals(value, java_lang_String::value(java_string)), 725 "value must be same as java_lang_String::value(java_string)"); 726 assert(start + len <= java_lang_String::length(java_string), "just checking"); 727 bool is_latin1 = java_lang_String::is_latin1(java_string); 728 if (!is_latin1) { 729 jchar* position = value->char_at_addr(start); 730 return UNICODE::as_utf8(position, len, buf, buflen); 731 } else { 732 jbyte* position = value->byte_at_addr(start); 733 return UNICODE::as_utf8(position, len, buf, buflen); 734 } 735 } 736 737 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) { 738 assert(java_string->klass() == vmClasses::String_klass(), 739 "must be java_string"); 740 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 741 int length = java_lang_String::length(java_string, value); 742 if (length != len) { 743 return false; 744 } 745 bool is_latin1 = java_lang_String::is_latin1(java_string); 746 if (!is_latin1) { 747 for (int i = 0; i < len; i++) { 748 if (value->char_at(i) != chars[i]) { 749 return false; 750 } 751 } 752 } else { 753 for (int i = 0; i < len; i++) { 754 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 755 return false; 756 } 757 } 758 } 759 return true; 760 } 761 762 bool java_lang_String::equals(oop java_string, const char* utf8_string, size_t utf8_len) { 763 assert(java_string->klass() == vmClasses::String_klass(), 764 "must be java_string"); 765 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 766 int length = java_lang_String::length(java_string, value); 767 int unicode_length = UTF8::unicode_length(utf8_string, utf8_len); 768 if (length != unicode_length) { 769 return false; 770 } 771 bool is_latin1 = java_lang_String::is_latin1(java_string); 772 jchar c; 773 if (!is_latin1) { 774 for (int i = 0; i < unicode_length; i++) { 775 utf8_string = UTF8::next(utf8_string, &c); 776 if (value->char_at(i) != c) { 777 return false; 778 } 779 } 780 } else { 781 for (int i = 0; i < unicode_length; i++) { 782 utf8_string = UTF8::next(utf8_string, &c); 783 if ((((jchar) value->byte_at(i)) & 0xff) != c) { 784 return false; 785 } 786 } 787 } 788 return true; 789 } 790 791 bool java_lang_String::equals(oop str1, oop str2) { 792 assert(str1->klass() == vmClasses::String_klass(), 793 "must be java String"); 794 assert(str2->klass() == vmClasses::String_klass(), 795 "must be java String"); 796 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1); 797 bool is_latin1 = java_lang_String::is_latin1(str1); 798 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2); 799 bool is_latin2 = java_lang_String::is_latin1(str2); 800 801 if (is_latin1 != is_latin2) { 802 // Strings with different coders are never equal. 803 return false; 804 } 805 return value_equals(value1, value2); 806 } 807 808 // Print the given string to the given outputStream, limiting the output to 809 // at most max_length of the string's characters. If the length exceeds the 810 // limit we print an abridged version of the string with the "middle" elided 811 // and replaced by " ... (N characters ommitted) ... ". If max_length is odd 812 // it is treated as max_length-1. 813 void java_lang_String::print(oop java_string, outputStream* st, int max_length) { 814 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string"); 815 // We need at least two characters to print A ... B 816 assert(max_length > 1, "invalid max_length: %d", max_length); 817 818 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 819 820 if (value == nullptr) { 821 // This can happen if, e.g., printing a String 822 // object before its initializer has been called 823 st->print("nullptr"); 824 return; 825 } 826 827 int length = java_lang_String::length(java_string, value); 828 bool is_latin1 = java_lang_String::is_latin1(java_string); 829 830 bool abridge = length > max_length; 831 832 st->print("\""); 833 for (int index = 0; index < length; index++) { 834 // If we need to abridge and we've printed half the allowed characters 835 // then jump to the tail of the string. 836 if (abridge && index >= max_length / 2) { 837 st->print(" ... (%d characters ommitted) ... ", length - 2 * (max_length / 2)); 838 index = length - (max_length / 2); 839 abridge = false; // only do this once 840 } 841 jchar c = (!is_latin1) ? value->char_at(index) : 842 ((jchar) value->byte_at(index)) & 0xff; 843 if (c < ' ') { 844 st->print("\\x%02X", c); // print control characters e.g. \x0A 845 } else { 846 st->print("%c", c); 847 } 848 } 849 st->print("\""); 850 851 if (length > max_length) { 852 st->print(" (abridged) "); 853 } 854 } 855 856 // java_lang_Class 857 858 int java_lang_Class::_klass_offset; 859 int java_lang_Class::_array_klass_offset; 860 int java_lang_Class::_oop_size_offset; 861 int java_lang_Class::_static_oop_field_count_offset; 862 int java_lang_Class::_class_loader_offset; 863 int java_lang_Class::_module_offset; 864 int java_lang_Class::_protection_domain_offset; 865 int java_lang_Class::_component_mirror_offset; 866 int java_lang_Class::_init_lock_offset; 867 int java_lang_Class::_signers_offset; 868 int java_lang_Class::_name_offset; 869 int java_lang_Class::_source_file_offset; 870 int java_lang_Class::_classData_offset; 871 int java_lang_Class::_classRedefinedCount_offset; 872 int java_lang_Class::_reflectionData_offset; 873 int java_lang_Class::_modifiers_offset; 874 int java_lang_Class::_is_primitive_offset; 875 876 bool java_lang_Class::_offsets_computed = false; 877 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr; 878 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr; 879 880 #ifdef ASSERT 881 inline static void assert_valid_static_string_field(fieldDescriptor* fd) { 882 assert(fd->has_initial_value(), "caller should have checked this"); 883 assert(fd->field_type() == T_OBJECT, "caller should have checked this"); 884 assert(fd->signature() == vmSymbols::string_signature(), "just checking"); 885 } 886 #endif 887 888 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 889 DEBUG_ONLY(assert_valid_static_string_field(fd);) 890 oop string = fd->string_initial_value(CHECK); 891 mirror()->obj_field_put(fd->offset(), string); 892 } 893 894 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) { 895 assert(fd->has_initial_value(), "caller should have checked this"); 896 BasicType t = fd->field_type(); 897 switch (t) { 898 case T_BYTE: 899 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value())); 900 break; 901 case T_BOOLEAN: 902 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value())); 903 break; 904 case T_CHAR: 905 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value())); 906 break; 907 case T_SHORT: 908 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value())); 909 break; 910 case T_INT: 911 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 912 break; 913 case T_FLOAT: 914 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 915 break; 916 case T_DOUBLE: 917 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 918 break; 919 case T_LONG: 920 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 921 break; 922 default: 923 // Illegal ConstantValue attribute in class file should have been 924 // caught during classfile parsing. 925 ShouldNotReachHere(); 926 } 927 } 928 929 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 930 assert(mirror.not_null() && fd->is_static(), "just checking"); 931 if (fd->has_initial_value()) { 932 if (fd->field_type() != T_OBJECT) { 933 initialize_static_primitive_field(fd, mirror); 934 } else { 935 initialize_static_string_field(fd, mirror, CHECK); 936 } 937 } 938 } 939 940 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 941 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 942 943 // If the offset was read from the shared archive, it was fixed up already 944 if (!k->is_shared()) { 945 if (k->is_instance_klass()) { 946 // During bootstrap, java.lang.Class wasn't loaded so static field 947 // offsets were computed without the size added it. Go back and 948 // update all the static field offsets to included the size. 949 950 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow 951 // content updates. So the FieldInfo stream has to be decompressed into a temporary array, 952 // static fields offsets are updated in this array before reencoding everything into 953 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream. 954 955 int java_fields; 956 int injected_fields; 957 InstanceKlass* ik = InstanceKlass::cast(k); 958 GrowableArray<FieldInfo>* fields = 959 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(), 960 &java_fields, &injected_fields); 961 for (int i = 0; i < fields->length(); i++) { 962 FieldInfo* fi = fields->adr_at(i); 963 if (fi->access_flags().is_static()) { 964 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields()); 965 } 966 } 967 Array<u1>* old_stream = ik->fieldinfo_stream(); 968 assert(fields->length() == (java_fields + injected_fields), "Must be"); 969 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK); 970 ik->set_fieldinfo_stream(new_fis); 971 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream); 972 } 973 } 974 975 if (k->is_shared() && k->has_archived_mirror_index()) { 976 if (ArchiveHeapLoader::is_in_use()) { 977 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK); 978 assert(present, "Missing archived mirror for %s", k->external_name()); 979 return; 980 } else { 981 k->clear_java_mirror_handle(); 982 k->clear_archived_mirror_index(); 983 } 984 } 985 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK); 986 } 987 988 void java_lang_Class::initialize_mirror_fields(Klass* k, 989 Handle mirror, 990 Handle protection_domain, 991 Handle classData, 992 TRAPS) { 993 // Allocate a simple java object for a lock. 994 // This needs to be a java object because during class initialization 995 // it can be held across a java call. 996 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 997 set_init_lock(mirror(), r); 998 999 // Set protection domain also 1000 set_protection_domain(mirror(), protection_domain()); 1001 1002 // Initialize static fields 1003 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 1004 1005 // Set classData 1006 set_class_data(mirror(), classData()); 1007 } 1008 1009 // Set the java.lang.Module module field in the java_lang_Class mirror 1010 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) { 1011 if (module.is_null()) { 1012 // During startup, the module may be null only if java.base has not been defined yet. 1013 // Put the class on the fixup_module_list to patch later when the java.lang.Module 1014 // for java.base is known. But note that since we captured the null module another 1015 // thread may have completed that initialization. 1016 1017 bool javabase_was_defined = false; 1018 { 1019 MutexLocker m1(current, Module_lock); 1020 // Keep list of classes needing java.base module fixup 1021 if (!ModuleEntryTable::javabase_defined()) { 1022 assert(k->java_mirror() != nullptr, "Class's mirror is null"); 1023 k->class_loader_data()->inc_keep_alive_ref_count(); 1024 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized"); 1025 fixup_module_field_list()->push(k); 1026 } else { 1027 javabase_was_defined = true; 1028 } 1029 } 1030 1031 // If java.base was already defined then patch this particular class with java.base. 1032 if (javabase_was_defined) { 1033 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 1034 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr, 1035 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 1036 Handle javabase_handle(current, javabase_entry->module()); 1037 set_module(mirror(), javabase_handle()); 1038 } 1039 } else { 1040 assert(Universe::is_module_initialized() || 1041 (ModuleEntryTable::javabase_defined() && 1042 (module() == ModuleEntryTable::javabase_moduleEntry()->module())), 1043 "Incorrect java.lang.Module specification while creating mirror"); 1044 set_module(mirror(), module()); 1045 } 1046 } 1047 1048 // Statically allocate fixup lists because they always get created. 1049 void java_lang_Class::allocate_fixup_lists() { 1050 GrowableArray<Klass*>* mirror_list = 1051 new (mtClass) GrowableArray<Klass*>(40, mtClass); 1052 set_fixup_mirror_list(mirror_list); 1053 1054 GrowableArray<Klass*>* module_list = 1055 new (mtModule) GrowableArray<Klass*>(500, mtModule); 1056 set_fixup_module_field_list(module_list); 1057 } 1058 1059 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData, 1060 Handle& mirror, Handle& comp_mirror, TRAPS) { 1061 // Allocate mirror (java.lang.Class instance) 1062 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK); 1063 mirror = Handle(THREAD, mirror_oop); 1064 1065 // Setup indirection from mirror->klass 1066 set_klass(mirror(), k); 1067 1068 // Set the modifiers flag. 1069 u2 computed_modifiers = k->compute_modifier_flags(); 1070 set_modifiers(mirror(), computed_modifiers); 1071 1072 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 1073 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 1074 1075 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 1076 1077 // It might also have a component mirror. This mirror must already exist. 1078 if (k->is_array_klass()) { 1079 if (k->is_typeArray_klass()) { 1080 BasicType type = TypeArrayKlass::cast(k)->element_type(); 1081 if (is_scratch) { 1082 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type)); 1083 } else { 1084 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 1085 } 1086 } else { 1087 assert(k->is_objArray_klass(), "Must be"); 1088 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1089 assert(element_klass != nullptr, "Must have an element klass"); 1090 if (is_scratch) { 1091 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass)); 1092 } else { 1093 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 1094 } 1095 } 1096 assert(comp_mirror() != nullptr, "must have a mirror"); 1097 1098 // Two-way link between the array klass and its component mirror: 1099 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 1100 set_component_mirror(mirror(), comp_mirror()); 1101 // See below for ordering dependencies between field array_klass in component mirror 1102 // and java_mirror in this klass. 1103 } else { 1104 assert(k->is_instance_klass(), "Must be"); 1105 1106 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD); 1107 if (HAS_PENDING_EXCEPTION) { 1108 // If any of the fields throws an exception like OOM remove the klass field 1109 // from the mirror so GC doesn't follow it after the klass has been deallocated. 1110 // This mirror looks like a primitive type, which logically it is because it 1111 // it represents no class. 1112 set_klass(mirror(), nullptr); 1113 return; 1114 } 1115 } 1116 } 1117 1118 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 1119 Handle module, Handle protection_domain, 1120 Handle classData, TRAPS) { 1121 assert(k != nullptr, "Use create_basic_type_mirror for primitive types"); 1122 assert(k->java_mirror() == nullptr, "should only assign mirror once"); 1123 1124 // Class_klass has to be loaded because it is used to allocate 1125 // the mirror. 1126 if (vmClasses::Class_klass_loaded()) { 1127 Handle mirror; 1128 Handle comp_mirror; 1129 1130 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK); 1131 1132 // set the classLoader field in the java_lang_Class instance 1133 assert(class_loader() == k->class_loader(), "should be same"); 1134 set_class_loader(mirror(), class_loader()); 1135 1136 // Setup indirection from klass->mirror 1137 // after any exceptions can happen during allocations. 1138 k->set_java_mirror(mirror); 1139 1140 // Set the module field in the java_lang_Class instance. This must be done 1141 // after the mirror is set. 1142 set_mirror_module_field(THREAD, k, mirror, module); 1143 1144 if (comp_mirror() != nullptr) { 1145 // Set after k->java_mirror() is published, because compiled code running 1146 // concurrently doesn't expect a k to have a null java_mirror. 1147 release_set_array_klass(comp_mirror(), k); 1148 } 1149 if (CDSConfig::is_dumping_heap()) { 1150 create_scratch_mirror(k, CHECK); 1151 } 1152 } else { 1153 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized"); 1154 fixup_mirror_list()->push(k); 1155 } 1156 } 1157 1158 #if INCLUDE_CDS_JAVA_HEAP 1159 // The "scratch mirror" stores the states of the mirror object that can be 1160 // decided at dump time (such as the initial values of the static fields, the 1161 // component mirror, etc). At runtime, more information is added to it by 1162 // java_lang_Class::restore_archived_mirror(). 1163 // 1164 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror() 1165 // produces the same result as /*runtime*/create_mirror(). 1166 // 1167 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the 1168 // latter may contain dumptime-specific information that cannot be archived 1169 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution). 1170 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) { 1171 if (k->class_loader() != nullptr && 1172 k->class_loader() != SystemDictionary::java_platform_loader() && 1173 k->class_loader() != SystemDictionary::java_system_loader()) { 1174 // We only archive the mirrors of classes loaded by the built-in loaders 1175 return; 1176 } 1177 1178 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime 1179 Handle mirror; 1180 Handle comp_mirror; 1181 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK); 1182 1183 if (comp_mirror() != nullptr) { 1184 release_set_array_klass(comp_mirror(), k); 1185 } 1186 1187 HeapShared::set_scratch_java_mirror(k, mirror()); 1188 } 1189 1190 // Returns true if the mirror is updated, false if no archived mirror 1191 // data is present. After the archived mirror object is restored, the 1192 // shared klass' _has_raw_archived_mirror flag is cleared. 1193 bool java_lang_Class::restore_archived_mirror(Klass *k, 1194 Handle class_loader, Handle module, 1195 Handle protection_domain, TRAPS) { 1196 // Postpone restoring archived mirror until java.lang.Class is loaded. Please 1197 // see more details in vmClasses::resolve_all(). 1198 if (!vmClasses::Class_klass_loaded()) { 1199 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized"); 1200 fixup_mirror_list()->push(k); 1201 return true; 1202 } 1203 1204 oop m = k->archived_java_mirror(); 1205 assert(m != nullptr, "must have stored non-null archived mirror"); 1206 1207 // Sanity: clear it now to prevent re-initialization if any of the following fails 1208 k->clear_archived_mirror_index(); 1209 1210 // mirror is archived, restore 1211 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m)); 1212 assert(as_Klass(m) == k, "must be"); 1213 Handle mirror(THREAD, m); 1214 1215 if (!k->is_array_klass()) { 1216 // - local static final fields with initial values were initialized at dump time 1217 1218 // create the init_lock 1219 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false)); 1220 set_init_lock(mirror(), r); 1221 1222 if (protection_domain.not_null()) { 1223 set_protection_domain(mirror(), protection_domain()); 1224 } 1225 } 1226 1227 assert(class_loader() == k->class_loader(), "should be same"); 1228 if (class_loader.not_null()) { 1229 set_class_loader(mirror(), class_loader()); 1230 } 1231 1232 k->set_java_mirror(mirror); 1233 1234 set_mirror_module_field(THREAD, k, mirror, module); 1235 1236 if (log_is_enabled(Trace, cds, heap, mirror)) { 1237 ResourceMark rm(THREAD); 1238 log_trace(cds, heap, mirror)( 1239 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1240 } 1241 1242 return true; 1243 } 1244 #endif // INCLUDE_CDS_JAVA_HEAP 1245 1246 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1247 assert(_module_offset != 0, "must have been computed already"); 1248 set_module(k->java_mirror(), module()); 1249 } 1250 1251 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) { 1252 assert(_oop_size_offset != 0, "must be set"); 1253 assert(size > 0, "Oop size must be greater than zero, not %zu", size); 1254 assert(size <= INT_MAX, "Lossy conversion: %zu", size); 1255 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size; 1256 } 1257 1258 int java_lang_Class::static_oop_field_count(oop java_class) { 1259 assert(_static_oop_field_count_offset != 0, "must be set"); 1260 return java_class->int_field(_static_oop_field_count_offset); 1261 } 1262 1263 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1264 assert(_static_oop_field_count_offset != 0, "must be set"); 1265 java_class->int_field_put(_static_oop_field_count_offset, size); 1266 } 1267 1268 oop java_lang_Class::protection_domain(oop java_class) { 1269 assert(_protection_domain_offset != 0, "must be set"); 1270 return java_class->obj_field(_protection_domain_offset); 1271 } 1272 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1273 assert(_protection_domain_offset != 0, "must be set"); 1274 java_class->obj_field_put(_protection_domain_offset, pd); 1275 } 1276 1277 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1278 assert(_component_mirror_offset != 0, "must be set"); 1279 assert(java_lang_Class::as_Klass(java_class) != nullptr && 1280 java_lang_Class::as_Klass(java_class)->is_array_klass(), "must be"); 1281 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1282 } 1283 1284 oop java_lang_Class::component_mirror(oop java_class) { 1285 assert(_component_mirror_offset != 0, "must be set"); 1286 return java_class->obj_field(_component_mirror_offset); 1287 } 1288 1289 oop java_lang_Class::init_lock(oop java_class) { 1290 assert(_init_lock_offset != 0, "must be set"); 1291 return java_class->obj_field(_init_lock_offset); 1292 } 1293 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 1294 assert(_init_lock_offset != 0, "must be set"); 1295 java_class->obj_field_put(_init_lock_offset, init_lock); 1296 } 1297 1298 objArrayOop java_lang_Class::signers(oop java_class) { 1299 assert(_signers_offset != 0, "must be set"); 1300 return (objArrayOop)java_class->obj_field(_signers_offset); 1301 } 1302 1303 oop java_lang_Class::class_data(oop java_class) { 1304 assert(_classData_offset != 0, "must be set"); 1305 return java_class->obj_field(_classData_offset); 1306 } 1307 void java_lang_Class::set_class_data(oop java_class, oop class_data) { 1308 assert(_classData_offset != 0, "must be set"); 1309 java_class->obj_field_put(_classData_offset, class_data); 1310 } 1311 1312 void java_lang_Class::set_reflection_data(oop java_class, oop reflection_data) { 1313 assert(_reflectionData_offset != 0, "must be set"); 1314 java_class->obj_field_put(_reflectionData_offset, reflection_data); 1315 } 1316 1317 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1318 assert(_class_loader_offset != 0, "offsets should have been initialized"); 1319 java_class->obj_field_put(_class_loader_offset, loader); 1320 } 1321 1322 oop java_lang_Class::class_loader(oop java_class) { 1323 assert(_class_loader_offset != 0, "must be set"); 1324 return java_class->obj_field(_class_loader_offset); 1325 } 1326 1327 oop java_lang_Class::module(oop java_class) { 1328 assert(_module_offset != 0, "must be set"); 1329 return java_class->obj_field(_module_offset); 1330 } 1331 1332 void java_lang_Class::set_module(oop java_class, oop module) { 1333 assert(_module_offset != 0, "must be set"); 1334 java_class->obj_field_put(_module_offset, module); 1335 } 1336 1337 oop java_lang_Class::name(Handle java_class, TRAPS) { 1338 assert(_name_offset != 0, "must be set"); 1339 oop o = java_class->obj_field(_name_offset); 1340 if (o == nullptr) { 1341 o = StringTable::intern(as_external_name(java_class()), THREAD); 1342 java_class->obj_field_put(_name_offset, o); 1343 } 1344 return o; 1345 } 1346 1347 oop java_lang_Class::source_file(oop java_class) { 1348 assert(_source_file_offset != 0, "must be set"); 1349 return java_class->obj_field(_source_file_offset); 1350 } 1351 1352 void java_lang_Class::set_source_file(oop java_class, oop source_file) { 1353 assert(_source_file_offset != 0, "must be set"); 1354 java_class->obj_field_put(_source_file_offset, source_file); 1355 } 1356 1357 void java_lang_Class::set_is_primitive(oop java_class) { 1358 assert(_is_primitive_offset != 0, "must be set"); 1359 java_class->bool_field_put(_is_primitive_offset, true); 1360 } 1361 1362 1363 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1364 // Mirrors for basic types have a null klass field, which makes them special. 1365 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL); 1366 if (type != T_VOID) { 1367 Klass* aklass = Universe::typeArrayKlass(type); 1368 assert(aklass != nullptr, "correct bootstrap"); 1369 release_set_array_klass(java_class, aklass); 1370 } 1371 #ifdef ASSERT 1372 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass()); 1373 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1374 #endif 1375 set_modifiers(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC); 1376 set_is_primitive(java_class); 1377 return java_class; 1378 } 1379 1380 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1381 assert(is_instance(java_class), "must be a Class object"); 1382 java_class->metadata_field_put(_klass_offset, klass); 1383 } 1384 1385 1386 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1387 assert(is_instance(java_class), "must be a Class object"); 1388 Symbol* name = nullptr; 1389 bool is_instance = false; 1390 if (is_primitive(java_class)) { 1391 name = vmSymbols::type_signature(primitive_type(java_class)); 1392 } else { 1393 Klass* k = as_Klass(java_class); 1394 is_instance = k->is_instance_klass(); 1395 name = k->name(); 1396 } 1397 if (name == nullptr) { 1398 st->print("<null>"); 1399 return; 1400 } 1401 if (is_instance) st->print("L"); 1402 st->write((char*) name->base(), (int) name->utf8_length()); 1403 if (is_instance) st->print(";"); 1404 } 1405 1406 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) { 1407 assert(is_instance(java_class), "must be a Class object"); 1408 Symbol* name; 1409 if (is_primitive(java_class)) { 1410 name = vmSymbols::type_signature(primitive_type(java_class)); 1411 // Because this can create a new symbol, the caller has to decrement 1412 // the refcount, so make adjustment here and below for symbols returned 1413 // that are not created or incremented due to a successful lookup. 1414 name->increment_refcount(); 1415 } else { 1416 Klass* k = as_Klass(java_class); 1417 if (!k->is_instance_klass()) { 1418 name = k->name(); 1419 name->increment_refcount(); 1420 } else { 1421 ResourceMark rm; 1422 const char* sigstr = k->signature_name(); 1423 int siglen = (int) strlen(sigstr); 1424 if (!intern_if_not_found) { 1425 name = SymbolTable::probe(sigstr, siglen); 1426 } else { 1427 name = SymbolTable::new_symbol(sigstr, siglen); 1428 } 1429 } 1430 } 1431 return name; 1432 } 1433 1434 // Returns the Java name for this Java mirror (Resource allocated) 1435 // See Klass::external_name(). 1436 // For primitive type Java mirrors, its type name is returned. 1437 const char* java_lang_Class::as_external_name(oop java_class) { 1438 assert(is_instance(java_class), "must be a Class object"); 1439 const char* name = nullptr; 1440 if (is_primitive(java_class)) { 1441 name = type2name(primitive_type(java_class)); 1442 } else { 1443 name = as_Klass(java_class)->external_name(); 1444 } 1445 if (name == nullptr) { 1446 name = "<null>"; 1447 } 1448 return name; 1449 } 1450 1451 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1452 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1453 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass"); 1454 return k; 1455 } 1456 1457 1458 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1459 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1460 java_class->release_metadata_field_put(_array_klass_offset, klass); 1461 } 1462 1463 1464 BasicType java_lang_Class::primitive_type(oop java_class) { 1465 assert(is_primitive(java_class), "just checking"); 1466 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1467 BasicType type = T_VOID; 1468 if (ak != nullptr) { 1469 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1470 type = ArrayKlass::cast(ak)->element_type(); 1471 } else { 1472 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1473 } 1474 #ifdef ASSERT 1475 if (CDSConfig::is_dumping_heap()) { 1476 oop mirror = Universe::java_mirror(type); 1477 oop scratch_mirror = HeapShared::scratch_java_mirror(type); 1478 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent"); 1479 } else { 1480 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1481 } 1482 #endif 1483 return type; 1484 } 1485 1486 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1487 assert(is_instance(java_class), "must be a Class object"); 1488 if (is_primitive(java_class)) { 1489 if (reference_klass != nullptr) 1490 (*reference_klass) = nullptr; 1491 return primitive_type(java_class); 1492 } else { 1493 if (reference_klass != nullptr) 1494 (*reference_klass) = as_Klass(java_class); 1495 return T_OBJECT; 1496 } 1497 } 1498 1499 1500 oop java_lang_Class::primitive_mirror(BasicType t) { 1501 oop mirror = Universe::java_mirror(t); 1502 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class"); 1503 assert(is_primitive(mirror), "must be primitive"); 1504 return mirror; 1505 } 1506 1507 #define CLASS_FIELDS_DO(macro) \ 1508 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \ 1509 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1510 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1511 macro(_module_offset, k, "module", module_signature, false); \ 1512 macro(_name_offset, k, "name", string_signature, false); \ 1513 macro(_classData_offset, k, "classData", object_signature, false); \ 1514 macro(_reflectionData_offset, k, "reflectionData", java_lang_ref_SoftReference_signature, false); \ 1515 macro(_signers_offset, k, "signers", object_array_signature, false); \ 1516 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), char_signature, false); \ 1517 macro(_protection_domain_offset, k, "protectionDomain", java_security_ProtectionDomain_signature, false); \ 1518 macro(_is_primitive_offset, k, "primitive", bool_signature, false); 1519 1520 void java_lang_Class::compute_offsets() { 1521 if (_offsets_computed) { 1522 return; 1523 } 1524 1525 _offsets_computed = true; 1526 1527 InstanceKlass* k = vmClasses::Class_klass(); 1528 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1529 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1530 } 1531 1532 #if INCLUDE_CDS 1533 void java_lang_Class::serialize_offsets(SerializeClosure* f) { 1534 f->do_bool(&_offsets_computed); 1535 1536 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1537 1538 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1539 } 1540 #endif 1541 1542 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1543 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1544 return the_class_mirror->int_field(_classRedefinedCount_offset); 1545 } 1546 1547 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1548 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1549 the_class_mirror->int_field_put(_classRedefinedCount_offset, value); 1550 } 1551 1552 int java_lang_Class::modifiers(oop the_class_mirror) { 1553 assert(_modifiers_offset != 0, "offsets should have been initialized"); 1554 return the_class_mirror->char_field(_modifiers_offset); 1555 } 1556 1557 void java_lang_Class::set_modifiers(oop the_class_mirror, u2 value) { 1558 assert(_modifiers_offset != 0, "offsets should have been initialized"); 1559 the_class_mirror->char_field_put(_modifiers_offset, value); 1560 } 1561 1562 1563 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1564 // platform thread structure, and a eetop offset which was used for thread 1565 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1566 // merged, so in the HotSpot VM we just use the eetop field for the thread 1567 // instead of the privateInfo_offset. 1568 // 1569 // Note: The stackSize field is only present starting in 1.4. 1570 1571 int java_lang_Thread_FieldHolder::_group_offset; 1572 int java_lang_Thread_FieldHolder::_priority_offset; 1573 int java_lang_Thread_FieldHolder::_stackSize_offset; 1574 int java_lang_Thread_FieldHolder::_daemon_offset; 1575 int java_lang_Thread_FieldHolder::_thread_status_offset; 1576 1577 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \ 1578 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1579 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1580 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1581 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1582 macro(_thread_status_offset, k, "threadStatus", int_signature, false) 1583 1584 void java_lang_Thread_FieldHolder::compute_offsets() { 1585 assert(_group_offset == 0, "offsets should be initialized only once"); 1586 1587 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass(); 1588 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1589 } 1590 1591 #if INCLUDE_CDS 1592 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) { 1593 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1594 } 1595 #endif 1596 1597 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) { 1598 return holder->obj_field(_group_offset); 1599 } 1600 1601 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) { 1602 return (ThreadPriority)holder->int_field(_priority_offset); 1603 } 1604 1605 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) { 1606 holder->int_field_put(_priority_offset, priority); 1607 } 1608 1609 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) { 1610 return holder->long_field(_stackSize_offset); 1611 } 1612 1613 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) { 1614 return holder->bool_field(_daemon_offset) != 0; 1615 } 1616 1617 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) { 1618 assert(val, "daemon status is never turned off"); 1619 holder->bool_field_put(_daemon_offset, val); 1620 } 1621 1622 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) { 1623 holder->int_field_put(_thread_status_offset, static_cast<int>(status)); 1624 } 1625 1626 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) { 1627 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset)); 1628 } 1629 1630 1631 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0; 1632 1633 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \ 1634 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true); 1635 1636 void java_lang_Thread_Constants::compute_offsets() { 1637 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once"); 1638 1639 InstanceKlass* k = vmClasses::Thread_Constants_klass(); 1640 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1641 } 1642 1643 #if INCLUDE_CDS 1644 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) { 1645 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1646 } 1647 #endif 1648 1649 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() { 1650 InstanceKlass* k = vmClasses::Thread_Constants_klass(); 1651 oop base = k->static_field_base_raw(); 1652 return base->obj_field(_static_VTHREAD_GROUP_offset); 1653 } 1654 1655 1656 int java_lang_Thread::_holder_offset; 1657 int java_lang_Thread::_name_offset; 1658 int java_lang_Thread::_contextClassLoader_offset; 1659 int java_lang_Thread::_eetop_offset; 1660 int java_lang_Thread::_jvmti_thread_state_offset; 1661 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset; 1662 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset; 1663 int java_lang_Thread::_interrupted_offset; 1664 int java_lang_Thread::_interruptLock_offset; 1665 int java_lang_Thread::_tid_offset; 1666 int java_lang_Thread::_continuation_offset; 1667 int java_lang_Thread::_park_blocker_offset; 1668 int java_lang_Thread::_scopedValueBindings_offset; 1669 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;) 1670 1671 #define THREAD_FIELDS_DO(macro) \ 1672 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \ 1673 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1674 macro(_contextClassLoader_offset, k, "contextClassLoader", classloader_signature, false); \ 1675 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1676 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \ 1677 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \ 1678 macro(_tid_offset, k, "tid", long_signature, false); \ 1679 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \ 1680 macro(_continuation_offset, k, "cont", continuation_signature, false); \ 1681 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false); 1682 1683 void java_lang_Thread::compute_offsets() { 1684 assert(_holder_offset == 0, "offsets should be initialized only once"); 1685 1686 InstanceKlass* k = vmClasses::Thread_klass(); 1687 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1688 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1689 } 1690 1691 #if INCLUDE_CDS 1692 void java_lang_Thread::serialize_offsets(SerializeClosure* f) { 1693 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1694 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1695 } 1696 #endif 1697 1698 JavaThread* java_lang_Thread::thread(oop java_thread) { 1699 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset)); 1700 } 1701 1702 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) { 1703 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset)); 1704 } 1705 1706 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1707 java_thread->address_field_put(_eetop_offset, (address)thread); 1708 } 1709 1710 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) { 1711 java_thread->release_address_field_put(_eetop_offset, (address)thread); 1712 } 1713 1714 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) { 1715 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset); 1716 } 1717 1718 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) { 1719 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state); 1720 } 1721 1722 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) { 1723 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset); 1724 } 1725 1726 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) { 1727 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked"); 1728 int val = VTMS_transition_disable_count(java_thread); 1729 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1); 1730 } 1731 1732 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) { 1733 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked"); 1734 int val = VTMS_transition_disable_count(java_thread); 1735 assert(val > 0, "VTMS_transition_disable_count should never be negative"); 1736 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1); 1737 } 1738 1739 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) { 1740 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset); 1741 } 1742 1743 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) { 1744 assert(is_in_VTMS_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside"); 1745 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val); 1746 } 1747 1748 int java_lang_Thread::is_in_VTMS_transition_offset() { 1749 return _jvmti_is_in_VTMS_transition_offset; 1750 } 1751 1752 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) { 1753 assert(java_thread != nullptr, "need a java_lang_Thread pointer here"); 1754 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr); 1755 } 1756 1757 oop java_lang_Thread::holder(oop java_thread) { 1758 // Note: may return null if the thread is still attaching 1759 return java_thread->obj_field(_holder_offset); 1760 } 1761 oop java_lang_Thread::interrupt_lock(oop java_thread) { 1762 return java_thread->obj_field(_interruptLock_offset); 1763 } 1764 1765 bool java_lang_Thread::interrupted(oop java_thread) { 1766 // Make sure the caller can safely access oops. 1767 assert(Thread::current()->is_VM_thread() || 1768 (JavaThread::current()->thread_state() != _thread_blocked && 1769 JavaThread::current()->thread_state() != _thread_in_native), 1770 "Unsafe access to oop"); 1771 return java_thread->bool_field_volatile(_interrupted_offset); 1772 } 1773 1774 void java_lang_Thread::set_interrupted(oop java_thread, bool val) { 1775 // Make sure the caller can safely access oops. 1776 assert(Thread::current()->is_VM_thread() || 1777 (JavaThread::current()->thread_state() != _thread_blocked && 1778 JavaThread::current()->thread_state() != _thread_in_native), 1779 "Unsafe access to oop"); 1780 java_thread->bool_field_put_volatile(_interrupted_offset, val); 1781 } 1782 1783 1784 oop java_lang_Thread::name(oop java_thread) { 1785 return java_thread->obj_field(_name_offset); 1786 } 1787 1788 1789 void java_lang_Thread::set_name(oop java_thread, oop name) { 1790 java_thread->obj_field_put(_name_offset, name); 1791 } 1792 1793 // Convenience macros for setting and getting Thread fields that 1794 // are actually stored in the FieldHolder object of the thread. 1795 // The FieldHolder can be null whilst a thread is attaching via 1796 // JNI, and when the main thread is attaching. 1797 1798 // The default value should be the default/zero initialized value 1799 // of the field as it would be in java.lang.Thread.FieldHolder. 1800 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \ 1801 { \ 1802 oop holder = java_lang_Thread::holder(java_thread); \ 1803 if (holder != nullptr) \ 1804 return java_lang_Thread_FieldHolder::field(holder); \ 1805 else \ 1806 return default_val; \ 1807 } 1808 1809 // We should never be trying to set a field of an attaching thread. 1810 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \ 1811 { \ 1812 oop holder = java_lang_Thread::holder(java_thread); \ 1813 assert(holder != nullptr, "Thread not fully initialized"); \ 1814 java_lang_Thread_FieldHolder::set_##field(holder, value); \ 1815 } 1816 1817 1818 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1819 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0); 1820 } 1821 1822 1823 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1824 SET_FIELDHOLDER_FIELD(java_thread, priority, priority) 1825 } 1826 1827 1828 oop java_lang_Thread::threadGroup(oop java_thread) { 1829 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr); 1830 } 1831 1832 1833 bool java_lang_Thread::is_alive(oop java_thread) { 1834 JavaThread* thr = java_lang_Thread::thread(java_thread); 1835 return (thr != nullptr); 1836 } 1837 1838 1839 bool java_lang_Thread::is_daemon(oop java_thread) { 1840 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false); 1841 } 1842 1843 1844 void java_lang_Thread::set_daemon(oop java_thread) { 1845 SET_FIELDHOLDER_FIELD(java_thread, daemon, true); 1846 } 1847 1848 oop java_lang_Thread::context_class_loader(oop java_thread) { 1849 return java_thread->obj_field(_contextClassLoader_offset); 1850 } 1851 1852 1853 jlong java_lang_Thread::stackSize(oop java_thread) { 1854 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0); 1855 } 1856 1857 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1858 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) { 1859 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status); 1860 } 1861 1862 // Read thread status value from threadStatus field in java.lang.Thread java class. 1863 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1864 // Make sure the caller is operating on behalf of the VM or is 1865 // running VM code (state == _thread_in_vm). 1866 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1867 JavaThread::current()->thread_state() == _thread_in_vm, 1868 "Java Thread is not running in vm"); 1869 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */); 1870 } 1871 1872 ByteSize java_lang_Thread::thread_id_offset() { 1873 return in_ByteSize(_tid_offset); 1874 } 1875 1876 oop java_lang_Thread::park_blocker(oop java_thread) { 1877 return java_thread->obj_field_acquire(_park_blocker_offset); 1878 } 1879 1880 struct LockInfo { 1881 enum { // should be synced with jdk.internal.vm.ThreadSnapshot.ThreadLock constants 1882 PARKING_TO_WAIT = 0, 1883 ELIMINATED_SCALAR_REPLACED = 1, 1884 ELIMINATED_MONITOR = 2, 1885 LOCKED = 3, 1886 WAITING_TO_LOCK = 4, 1887 WAITING_ON = 5, 1888 WAITING_TO_RELOCK = 6, 1889 OWNABLE_SYNCHRONIZER = 7, 1890 }; 1891 1892 int _depth; 1893 int _type; 1894 oop _obj; 1895 1896 LockInfo(int depth, int type, oop obj) : _depth(depth), _type(type), _obj(obj) {} 1897 LockInfo() : _depth(0), _type(0), _obj(nullptr) {} 1898 }; 1899 1900 class GetThreadSnapshotClosure : public HandshakeClosure { 1901 public: 1902 Handle _java_thread; 1903 JavaThread* _thread; 1904 int _depth; 1905 bool _retry_handshake; 1906 GrowableArray<Method*>* _methods; 1907 GrowableArray<int>* _bcis; 1908 JavaThreadStatus _thread_status; 1909 oop _name; 1910 bool _with_locks; 1911 bool _found_first_lock; 1912 GrowableArray<LockInfo>* _locks; 1913 1914 GetThreadSnapshotClosure(Handle java_thread, JavaThread* thread, bool with_locks) : 1915 HandshakeClosure("GetThreadSnapshotClosure"), _java_thread(java_thread), _thread(thread), 1916 _depth(0), _retry_handshake(false), 1917 _methods(nullptr), _bcis(nullptr), 1918 _thread_status(), _name(nullptr), 1919 _with_locks(with_locks), _found_first_lock(false), _locks(nullptr) { } 1920 virtual ~GetThreadSnapshotClosure() { 1921 delete _methods; 1922 delete _bcis; 1923 if (_locks != nullptr) { 1924 delete _locks; 1925 } 1926 } 1927 1928 bool read_reset_retry() { 1929 bool ret = _retry_handshake; 1930 // If we re-execute the handshake this method need to return false 1931 // when the handshake cannot be performed. (E.g. thread terminating) 1932 _retry_handshake = false; 1933 return ret; 1934 } 1935 1936 void detect_locks(javaVFrame* jvf, int depth) { 1937 Thread* current = Thread::current(); 1938 1939 if (depth == 0 && !_found_first_lock) { 1940 // See javaVFrame::print_lock_info_on() for some other cases: 1941 // "waiting to re-lock in wait", "waiting on the Class initialization monitor". 1942 1943 // If this is the first frame and it is java.lang.Object.wait(...) 1944 // then print out the receiver. 1945 if (jvf->method()->name() == vmSymbols::wait_name() && 1946 jvf->method()->method_holder()->name() == vmSymbols::java_lang_Object()) { 1947 StackValueCollection* locs = jvf->locals(); 1948 if (locs->is_empty()) { 1949 _locks->push(LockInfo(depth, LockInfo::WAITING_ON, nullptr)); 1950 } else { 1951 int type = LockInfo::WAITING_ON; 1952 StackValue* sv = locs->at(0); 1953 if (sv->type() == T_OBJECT) { 1954 Handle o = locs->at(0)->get_obj(); 1955 if (_thread_status == JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER) { 1956 type = LockInfo::WAITING_TO_RELOCK;; 1957 } 1958 _locks->push(LockInfo(depth, type, o())); 1959 } 1960 } 1961 _found_first_lock = true; 1962 } else { 1963 oop park_blocker = java_lang_Thread::park_blocker(_java_thread()); 1964 if (park_blocker != nullptr) { 1965 _locks->push(LockInfo(depth, LockInfo::PARKING_TO_WAIT, park_blocker)); 1966 if (park_blocker->is_a(vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass())) { 1967 oop owner = java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(park_blocker); 1968 if (owner != nullptr) { 1969 _locks->push(LockInfo(depth, LockInfo::OWNABLE_SYNCHRONIZER, owner)); 1970 } 1971 } 1972 _found_first_lock = true; 1973 } 1974 } 1975 } 1976 1977 GrowableArray<MonitorInfo*>* mons = jvf->monitors(); 1978 if (!mons->is_empty()) { 1979 for (int index = (mons->length() - 1); index >= 0; index--) { 1980 MonitorInfo* monitor = mons->at(index); 1981 if (monitor->eliminated() && jvf->is_compiled_frame()) { // Eliminated in compiled code 1982 if (monitor->owner_is_scalar_replaced()) { 1983 Klass* k = java_lang_Class::as_Klass(monitor->owner_klass()); 1984 _locks->push(LockInfo(depth, LockInfo::ELIMINATED_SCALAR_REPLACED, k->klass_holder())); 1985 } else { 1986 Handle obj(current, monitor->owner()); 1987 if (obj() != nullptr) { 1988 _locks->push(LockInfo(depth, LockInfo::ELIMINATED_MONITOR, obj())); 1989 } 1990 } 1991 continue; 1992 } 1993 if (monitor->owner() != nullptr) { 1994 // the monitor is associated with an object, i.e., it is locked 1995 int type = LockInfo::LOCKED; 1996 1997 if (depth == 0 && !_found_first_lock) { 1998 ObjectMonitor* pending_moninor = java_lang_VirtualThread::is_instance(_java_thread()) 1999 ? java_lang_VirtualThread::current_pending_monitor(_java_thread()) 2000 : jvf->thread()->current_pending_monitor(); 2001 2002 markWord mark = monitor->owner()->mark(); 2003 // The first stage of async deflation does not affect any field 2004 // used by this comparison so the ObjectMonitor* is usable here. 2005 if (mark.has_monitor()) { 2006 ObjectMonitor* mon = ObjectSynchronizer::read_monitor(current, monitor->owner(), mark); 2007 if (// if the monitor is null we must be in the process of locking 2008 mon == nullptr || 2009 // we have marked ourself as pending on this monitor 2010 mon == pending_moninor || 2011 // we are not the owner of this monitor 2012 (_thread != nullptr && !mon->is_entered(_thread))) { 2013 type = LockInfo::WAITING_TO_LOCK; 2014 } 2015 } 2016 } 2017 _locks->push(LockInfo(depth, type, monitor->owner())); 2018 2019 _found_first_lock = true; 2020 } 2021 } 2022 } 2023 } 2024 2025 void do_thread(Thread* th) override { 2026 if (!Thread::current()->is_Java_thread()) { 2027 _retry_handshake = true; 2028 return; 2029 } 2030 2031 bool is_virtual = java_lang_VirtualThread::is_instance(_java_thread()); 2032 if (_thread != nullptr) { 2033 if (is_virtual) { 2034 // mounted vthread, use carrier thread state 2035 oop carrier_thread = java_lang_VirtualThread::carrier_thread(_java_thread()); 2036 _thread_status = java_lang_Thread::get_thread_status(carrier_thread); 2037 } else { 2038 _thread_status = java_lang_Thread::get_thread_status(_java_thread()); 2039 } 2040 } else { 2041 // unmounted vthread 2042 int vt_state = java_lang_VirtualThread::state(_java_thread()); 2043 _thread_status = java_lang_VirtualThread::map_state_to_thread_status(vt_state); 2044 } 2045 _name = java_lang_Thread::name(_java_thread()); 2046 2047 if (_thread != nullptr && !_thread->has_last_Java_frame()) { 2048 // stack trace is empty 2049 return; 2050 } 2051 2052 bool walk_cont = false; 2053 2054 if (is_virtual) { 2055 if (_thread != nullptr) { 2056 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread 2057 const ContinuationEntry* ce = _thread->vthread_continuation(); 2058 if (ce == nullptr || ce->cont_oop(_thread) != java_lang_VirtualThread::continuation(_java_thread())) { 2059 // TODO: handle 2060 } 2061 } 2062 } else { 2063 walk_cont = (_thread->vthread_continuation() != nullptr); 2064 } 2065 2066 ResourceMark rm(Thread::current()); 2067 2068 const int max_depth = MaxJavaStackTraceDepth; 2069 const bool skip_hidden = !ShowHiddenFrames; 2070 2071 // Pick minimum length that will cover most cases 2072 int init_length = 64; 2073 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal); 2074 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal); 2075 2076 if (_with_locks) { 2077 _locks = new (mtInternal) GrowableArray<LockInfo>(init_length, mtInternal); 2078 } 2079 int total_count = 0; 2080 2081 vframeStream vfst(_thread != nullptr 2082 ? vframeStream(_thread, false, false, walk_cont) 2083 : vframeStream(java_lang_VirtualThread::continuation(_java_thread()))); 2084 2085 for (; 2086 !vfst.at_end() && (max_depth == 0 || max_depth != total_count); 2087 vfst.next()) { 2088 if (_with_locks) { 2089 detect_locks(vfst.asJavaVFrame(), total_count); 2090 } 2091 if (skip_hidden && (vfst.method()->is_hidden() || 2092 vfst.method()->is_continuation_enter_intrinsic())) { 2093 continue; 2094 } 2095 _methods->push(vfst.method()); 2096 _bcis->push(vfst.bci()); 2097 total_count++; 2098 } 2099 2100 _depth = total_count; 2101 } 2102 }; 2103 2104 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) { 2105 ThreadsListHandle tlh(JavaThread::current()); 2106 JavaThread* thread; 2107 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread); 2108 if (is_virtual) { 2109 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread); 2110 if (carrier_thread == nullptr) { 2111 return nullptr; 2112 } 2113 thread = java_lang_Thread::thread(carrier_thread); 2114 } else { 2115 thread = java_lang_Thread::thread(java_thread); 2116 } 2117 if (thread == nullptr) { 2118 return nullptr; 2119 } 2120 2121 class GetStackTraceClosure : public HandshakeClosure { 2122 public: 2123 const Handle _java_thread; 2124 int _depth; 2125 bool _retry_handshake; 2126 GrowableArray<Method*>* _methods; 2127 GrowableArray<int>* _bcis; 2128 2129 GetStackTraceClosure(Handle java_thread) : 2130 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false), 2131 _methods(nullptr), _bcis(nullptr) { 2132 } 2133 ~GetStackTraceClosure() { 2134 delete _methods; 2135 delete _bcis; 2136 } 2137 2138 bool read_reset_retry() { 2139 bool ret = _retry_handshake; 2140 // If we re-execute the handshake this method need to return false 2141 // when the handshake cannot be performed. (E.g. thread terminating) 2142 _retry_handshake = false; 2143 return ret; 2144 } 2145 2146 void do_thread(Thread* th) { 2147 if (!Thread::current()->is_Java_thread()) { 2148 _retry_handshake = true; 2149 return; 2150 } 2151 2152 JavaThread* thread = JavaThread::cast(th); 2153 2154 if (!thread->has_last_Java_frame()) { 2155 return; 2156 } 2157 2158 bool carrier = false; 2159 if (java_lang_VirtualThread::is_instance(_java_thread())) { 2160 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread 2161 const ContinuationEntry* ce = thread->vthread_continuation(); 2162 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) { 2163 return; // not mounted 2164 } 2165 } else { 2166 carrier = (thread->vthread_continuation() != nullptr); 2167 } 2168 2169 const int max_depth = MaxJavaStackTraceDepth; 2170 const bool skip_hidden = !ShowHiddenFrames; 2171 2172 // Pick minimum length that will cover most cases 2173 int init_length = 64; 2174 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal); 2175 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal); 2176 2177 int total_count = 0; 2178 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops 2179 !vfst.at_end() && (max_depth == 0 || max_depth != total_count); 2180 vfst.next()) { 2181 2182 if (skip_hidden && (vfst.method()->is_hidden() || 2183 vfst.method()->is_continuation_enter_intrinsic())) { 2184 continue; 2185 } 2186 2187 _methods->push(vfst.method()); 2188 _bcis->push(vfst.bci()); 2189 total_count++; 2190 } 2191 2192 _depth = total_count; 2193 } 2194 }; 2195 2196 // Handshake with target 2197 ResourceMark rm(THREAD); 2198 HandleMark hm(THREAD); 2199 GetStackTraceClosure gstc(Handle(THREAD, java_thread)); 2200 do { 2201 Handshake::execute(&gstc, &tlh, thread); 2202 } while (gstc.read_reset_retry()); 2203 2204 // Stop if no stack trace is found. 2205 if (gstc._depth == 0) { 2206 return nullptr; 2207 } 2208 2209 // Convert to StackTraceElement array 2210 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 2211 assert(k != nullptr, "must be loaded in 1.4+"); 2212 if (k->should_be_initialized()) { 2213 k->initialize(CHECK_NULL); 2214 } 2215 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL); 2216 2217 for (int i = 0; i < gstc._depth; i++) { 2218 methodHandle method(THREAD, gstc._methods->at(i)); 2219 oop element = java_lang_StackTraceElement::create(method, 2220 gstc._bcis->at(i), 2221 CHECK_NULL); 2222 trace->obj_at_put(i, element); 2223 } 2224 2225 return trace(); 2226 } 2227 2228 class jdk_internal_vm_ThreadLock: AllStatic { 2229 static bool _inited; 2230 static int _depth_offset; 2231 static int _typeOrdinal_offset; 2232 static int _obj_offset; 2233 2234 static void compute_offsets(InstanceKlass * klass, TRAPS) { 2235 JavaClasses::compute_offset(_depth_offset, klass, "depth", vmSymbols::int_signature(), false); 2236 JavaClasses::compute_offset(_typeOrdinal_offset, klass, "typeOrdinal", vmSymbols::int_signature(), false); 2237 JavaClasses::compute_offset(_obj_offset, klass, "obj", vmSymbols::object_signature(), false); 2238 } 2239 public: 2240 static void init(InstanceKlass* klass, TRAPS) { 2241 if (!_inited) { 2242 compute_offsets(klass, CHECK); 2243 _inited = true; 2244 } 2245 } 2246 2247 static Handle allocate(InstanceKlass* klass, TRAPS) { 2248 init(klass, CHECK_NH); 2249 return klass->allocate_instance_handle(CHECK_NH); 2250 } 2251 2252 static void set_depth(oop thread_lock, int depth) { 2253 thread_lock->int_field_put(_depth_offset, depth); 2254 } 2255 static void set_type(oop thread_lock, int type_ordinal) { 2256 thread_lock->int_field_put(_typeOrdinal_offset, type_ordinal); 2257 } 2258 static void set_lock_object(oop thread_lock, oop obj) { 2259 thread_lock->obj_field_put(_obj_offset, obj); 2260 } 2261 }; 2262 2263 bool jdk_internal_vm_ThreadLock::_inited = false; 2264 int jdk_internal_vm_ThreadLock::_depth_offset; 2265 int jdk_internal_vm_ThreadLock::_typeOrdinal_offset; 2266 int jdk_internal_vm_ThreadLock::_obj_offset; 2267 2268 class jdk_internal_vm_ThreadSnapshot: AllStatic { 2269 static bool _inited; 2270 static int _name_offset; 2271 static int _threadStatus_offset; 2272 static int _stackTrace_offset; 2273 static int _locks_offset; 2274 2275 static void compute_offsets(InstanceKlass* klass, TRAPS) { 2276 JavaClasses::compute_offset(_name_offset, klass, "name", vmSymbols::string_signature(), false); 2277 JavaClasses::compute_offset(_threadStatus_offset, klass, "threadStatus", vmSymbols::int_signature(), false); 2278 JavaClasses::compute_offset(_stackTrace_offset, klass, "stackTrace", vmSymbols::java_lang_StackTraceElement_array(), false); 2279 JavaClasses::compute_offset(_locks_offset, klass, "locks", vmSymbols::jdk_internal_vm_ThreadLock_array(), false); 2280 } 2281 public: 2282 static void init(InstanceKlass* klass, TRAPS) { 2283 if (!_inited) { 2284 compute_offsets(klass, CHECK); 2285 _inited = true; 2286 } 2287 } 2288 2289 static Handle allocate(InstanceKlass* klass, TRAPS) { 2290 init(klass, CHECK_NH); 2291 return klass->allocate_instance_handle(CHECK_NH); 2292 } 2293 2294 static void set_name(oop snapshot, oop name) { 2295 snapshot->obj_field_put(_name_offset, name); 2296 } 2297 static void set_thread_status(oop snapshot, int status) { 2298 snapshot->int_field_put(_threadStatus_offset, status); 2299 } 2300 static void set_stack_trace(oop snapshot, oop trace) { 2301 snapshot->obj_field_put(_stackTrace_offset, trace); 2302 } 2303 static void set_locks(oop snapshot, oop locks) { 2304 snapshot->obj_field_put(_locks_offset, locks); 2305 } 2306 }; 2307 2308 bool jdk_internal_vm_ThreadSnapshot::_inited = false; 2309 int jdk_internal_vm_ThreadSnapshot::_name_offset; 2310 int jdk_internal_vm_ThreadSnapshot::_threadStatus_offset; 2311 int jdk_internal_vm_ThreadSnapshot::_stackTrace_offset; 2312 int jdk_internal_vm_ThreadSnapshot::_locks_offset; 2313 2314 oop java_lang_Thread::get_thread_snapshot(jobject jthread, bool with_locks, TRAPS) { 2315 ThreadsListHandle tlh(JavaThread::current()); 2316 2317 ResourceMark rm(THREAD); 2318 HandleMark hm(THREAD); 2319 Handle java_thread(THREAD, JNIHandles::resolve(jthread)); 2320 2321 // wrapper to auto delete JvmtiVTMSTransitionDisabler 2322 class TransitionDisabler { 2323 JvmtiVTMSTransitionDisabler* _transition_disabler; 2324 public: 2325 TransitionDisabler() : _transition_disabler(nullptr) {} 2326 ~TransitionDisabler() { 2327 reset(); 2328 } 2329 void init(jobject jthread) { 2330 _transition_disabler = new (mtInternal) JvmtiVTMSTransitionDisabler(jthread); 2331 } 2332 void reset() { 2333 if (_transition_disabler != nullptr) { 2334 delete _transition_disabler; 2335 _transition_disabler = nullptr; 2336 } 2337 } 2338 } transition_disabler; 2339 2340 JavaThread* thread = nullptr; 2341 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread()); 2342 2343 if (is_virtual) { 2344 // 1st need to disable mount/unmount transitions 2345 transition_disabler.init(jthread); 2346 2347 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread()); 2348 if (carrier_thread != nullptr) { 2349 thread = java_lang_Thread::thread(carrier_thread); 2350 } 2351 } else { 2352 thread = java_lang_Thread::thread(java_thread()); 2353 } 2354 2355 // Handshake with target 2356 GetThreadSnapshotClosure cl(java_thread, thread, with_locks); 2357 if (thread == nullptr) { 2358 // unmounted vthread, execute on the current thread 2359 cl.do_thread(nullptr); 2360 } else { 2361 do { 2362 Handshake::execute(&cl, &tlh, thread); 2363 } while (cl.read_reset_retry()); 2364 } 2365 2366 // Handle thread name 2367 Handle thread_name(THREAD, cl._name); 2368 2369 // Convert to StackTraceElement array 2370 InstanceKlass* ste_klass = vmClasses::StackTraceElement_klass(); 2371 assert(ste_klass != nullptr, "must be loaded in 1.4+"); 2372 if (ste_klass->should_be_initialized()) { 2373 ste_klass->initialize(CHECK_NULL); 2374 } 2375 2376 int max_locks = cl._locks != nullptr ? cl._locks->length() : 0; 2377 2378 InstanceKlass* lock_klass = nullptr; 2379 if (with_locks) { 2380 Symbol* sym = vmSymbols::jdk_internal_vm_ThreadLock(); 2381 Klass* k = SystemDictionary::resolve_or_fail(sym, true, CHECK_NULL); 2382 lock_klass = InstanceKlass::cast(k); 2383 } 2384 2385 objArrayHandle trace = oopFactory::new_objArray_handle(ste_klass, cl._depth, CHECK_NULL); 2386 2387 for (int i = 0; i < cl._depth; i++) { 2388 methodHandle method(THREAD, cl._methods->at(i)); 2389 oop element = java_lang_StackTraceElement::create(method, cl._bcis->at(i), CHECK_NULL); 2390 trace->obj_at_put(i, element); 2391 } 2392 2393 objArrayHandle locks; 2394 int lock_index = 0; 2395 if (with_locks && max_locks > 0) { 2396 locks = oopFactory::new_objArray_handle(lock_klass, max_locks, CHECK_NULL); 2397 for (int n = 0; n < max_locks; n++) { 2398 LockInfo* lock_info = cl._locks->adr_at(lock_index++); 2399 Handle lock_object = Handle(THREAD, lock_info->_obj); 2400 2401 Handle lock = jdk_internal_vm_ThreadLock::allocate(lock_klass, CHECK_NULL); 2402 jdk_internal_vm_ThreadLock::set_depth(lock(), lock_info->_depth); 2403 jdk_internal_vm_ThreadLock::set_type(lock(), lock_info->_type); 2404 jdk_internal_vm_ThreadLock::set_lock_object(lock(), lock_object()); 2405 locks->obj_at_put(n, lock()); 2406 } 2407 } 2408 2409 // call static StackTraceElement[] StackTraceElement.of(StackTraceElement[] stackTrace) 2410 // to properly initialize STE. 2411 { 2412 JavaValue result(T_OBJECT); 2413 JavaCalls::call_static(&result, 2414 ste_klass, 2415 vmSymbols::java_lang_StackTraceElement_of_name(), 2416 vmSymbols::java_lang_StackTraceElement_of_signature(), 2417 trace, 2418 CHECK_NULL); 2419 // the method return the same trace object 2420 } 2421 2422 // all oops are handled, can enable transitions. 2423 transition_disabler.reset(); 2424 2425 Symbol* snapshot_name = vmSymbols::jdk_internal_vm_ThreadSnapshot(); 2426 Klass* snapshot_klass = SystemDictionary::resolve_or_fail(snapshot_name, true, CHECK_NULL); 2427 if (snapshot_klass->should_be_initialized()) { 2428 snapshot_klass->initialize(CHECK_NULL); 2429 } 2430 2431 Handle snapshot = jdk_internal_vm_ThreadSnapshot::allocate(InstanceKlass::cast(snapshot_klass), CHECK_NULL); 2432 jdk_internal_vm_ThreadSnapshot::set_name(snapshot(), thread_name()); 2433 jdk_internal_vm_ThreadSnapshot::set_thread_status(snapshot(), (int)cl._thread_status); 2434 jdk_internal_vm_ThreadSnapshot::set_stack_trace(snapshot(), trace()); 2435 jdk_internal_vm_ThreadSnapshot::set_locks(snapshot(), locks()); 2436 return snapshot(); 2437 } 2438 2439 const char* java_lang_Thread::thread_status_name(oop java_thread) { 2440 JavaThreadStatus status = get_thread_status(java_thread); 2441 switch (status) { 2442 case JavaThreadStatus::NEW : return "NEW"; 2443 case JavaThreadStatus::RUNNABLE : return "RUNNABLE"; 2444 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)"; 2445 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 2446 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 2447 case JavaThreadStatus::PARKED : return "WAITING (parking)"; 2448 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)"; 2449 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 2450 case JavaThreadStatus::TERMINATED : return "TERMINATED"; 2451 default : return "UNKNOWN"; 2452 }; 2453 } 2454 int java_lang_ThreadGroup::_parent_offset; 2455 int java_lang_ThreadGroup::_name_offset; 2456 int java_lang_ThreadGroup::_maxPriority_offset; 2457 int java_lang_ThreadGroup::_daemon_offset; 2458 2459 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 2460 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 2461 return java_thread_group->obj_field(_parent_offset); 2462 } 2463 2464 // ("name as oop" accessor is not necessary) 2465 2466 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 2467 oop name = java_thread_group->obj_field(_name_offset); 2468 // ThreadGroup.name can be null 2469 if (name != nullptr) { 2470 return java_lang_String::as_utf8_string(name); 2471 } 2472 return nullptr; 2473 } 2474 2475 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 2476 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 2477 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 2478 } 2479 2480 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 2481 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 2482 return java_thread_group->bool_field(_daemon_offset) != 0; 2483 } 2484 2485 #define THREADGROUP_FIELDS_DO(macro) \ 2486 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \ 2487 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2488 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \ 2489 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); 2490 2491 void java_lang_ThreadGroup::compute_offsets() { 2492 assert(_parent_offset == 0, "offsets should be initialized only once"); 2493 2494 InstanceKlass* k = vmClasses::ThreadGroup_klass(); 2495 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2496 } 2497 2498 #if INCLUDE_CDS 2499 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) { 2500 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2501 } 2502 #endif 2503 2504 2505 // java_lang_VirtualThread 2506 2507 int java_lang_VirtualThread::static_vthread_scope_offset; 2508 int java_lang_VirtualThread::_carrierThread_offset; 2509 int java_lang_VirtualThread::_continuation_offset; 2510 int java_lang_VirtualThread::_state_offset; 2511 int java_lang_VirtualThread::_next_offset; 2512 int java_lang_VirtualThread::_onWaitingList_offset; 2513 int java_lang_VirtualThread::_notified_offset; 2514 int java_lang_VirtualThread::_interruptible_wait_offset; 2515 int java_lang_VirtualThread::_timeout_offset; 2516 int java_lang_VirtualThread::_objectWaiter_offset; 2517 2518 #define VTHREAD_FIELDS_DO(macro) \ 2519 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \ 2520 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \ 2521 macro(_continuation_offset, k, "cont", continuation_signature, false); \ 2522 macro(_state_offset, k, "state", int_signature, false); \ 2523 macro(_next_offset, k, "next", vthread_signature, false); \ 2524 macro(_onWaitingList_offset, k, "onWaitingList", bool_signature, false); \ 2525 macro(_notified_offset, k, "notified", bool_signature, false); \ 2526 macro(_interruptible_wait_offset, k, "interruptableWait", bool_signature, false); \ 2527 macro(_timeout_offset, k, "timeout", long_signature, false); 2528 2529 2530 void java_lang_VirtualThread::compute_offsets() { 2531 InstanceKlass* k = vmClasses::VirtualThread_klass(); 2532 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2533 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2534 } 2535 2536 bool java_lang_VirtualThread::is_instance(oop obj) { 2537 return obj != nullptr && is_subclass(obj->klass()); 2538 } 2539 2540 oop java_lang_VirtualThread::carrier_thread(oop vthread) { 2541 oop thread = vthread->obj_field(_carrierThread_offset); 2542 return thread; 2543 } 2544 2545 oop java_lang_VirtualThread::continuation(oop vthread) { 2546 oop cont = vthread->obj_field(_continuation_offset); 2547 return cont; 2548 } 2549 2550 int java_lang_VirtualThread::state(oop vthread) { 2551 return vthread->int_field_acquire(_state_offset); 2552 } 2553 2554 void java_lang_VirtualThread::set_state(oop vthread, int state) { 2555 vthread->release_int_field_put(_state_offset, state); 2556 } 2557 2558 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) { 2559 jint* addr = vthread->field_addr<jint>(_state_offset); 2560 int res = Atomic::cmpxchg(addr, old_state, new_state); 2561 return res; 2562 } 2563 2564 oop java_lang_VirtualThread::next(oop vthread) { 2565 return vthread->obj_field(_next_offset); 2566 } 2567 2568 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) { 2569 vthread->obj_field_put(_next_offset, next_vthread); 2570 } 2571 2572 // Add vthread to the waiting list if it's not already in it. Multiple threads 2573 // could be trying to add vthread to the list at the same time, so we control 2574 // access with a cmpxchg on onWaitingList. The winner adds vthread to the list. 2575 // Method returns true if we added vthread to the list, false otherwise. 2576 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) { 2577 jboolean* addr = vthread->field_addr<jboolean>(_onWaitingList_offset); 2578 jboolean vthread_on_list = Atomic::load(addr); 2579 if (!vthread_on_list) { 2580 vthread_on_list = Atomic::cmpxchg(addr, (jboolean)JNI_FALSE, (jboolean)JNI_TRUE); 2581 if (!vthread_on_list) { 2582 for (;;) { 2583 oop head = list_head.resolve(); 2584 java_lang_VirtualThread::set_next(vthread, head); 2585 if (list_head.cmpxchg(head, vthread) == head) return true; 2586 } 2587 } 2588 } 2589 return false; // already on waiting list 2590 } 2591 2592 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) { 2593 vthread->bool_field_put_volatile(_notified_offset, value); 2594 } 2595 2596 void java_lang_VirtualThread::set_interruptible_wait(oop vthread, jboolean value) { 2597 vthread->bool_field_put_volatile(_interruptible_wait_offset, value); 2598 } 2599 2600 jlong java_lang_VirtualThread::timeout(oop vthread) { 2601 return vthread->long_field(_timeout_offset); 2602 } 2603 2604 void java_lang_VirtualThread::set_timeout(oop vthread, jlong value) { 2605 vthread->long_field_put(_timeout_offset, value); 2606 } 2607 2608 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) { 2609 JavaThreadStatus status = JavaThreadStatus::NEW; 2610 switch (state & ~SUSPENDED) { 2611 case NEW: 2612 status = JavaThreadStatus::NEW; 2613 break; 2614 case STARTED: 2615 case RUNNING: 2616 case PARKING: 2617 case TIMED_PARKING: 2618 case UNPARKED: 2619 case YIELDING: 2620 case YIELDED: 2621 case UNBLOCKED: 2622 case WAITING: 2623 case TIMED_WAITING: 2624 status = JavaThreadStatus::RUNNABLE; 2625 break; 2626 case PARKED: 2627 case PINNED: 2628 status = JavaThreadStatus::PARKED; 2629 break; 2630 case TIMED_PARKED: 2631 case TIMED_PINNED: 2632 status = JavaThreadStatus::PARKED_TIMED; 2633 break; 2634 case BLOCKING: 2635 case BLOCKED: 2636 status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER; 2637 break; 2638 case WAIT: 2639 status = JavaThreadStatus::IN_OBJECT_WAIT; 2640 break; 2641 case TIMED_WAIT: 2642 status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED; 2643 break; 2644 case TERMINATED: 2645 status = JavaThreadStatus::TERMINATED; 2646 break; 2647 default: 2648 ShouldNotReachHere(); 2649 } 2650 return status; 2651 } 2652 2653 ObjectMonitor* java_lang_VirtualThread::current_pending_monitor(oop vthread) { 2654 ObjectWaiter* waiter = objectWaiter(vthread); 2655 if (waiter != nullptr && waiter->at_monitorenter()) { 2656 return waiter->monitor(); 2657 } 2658 return nullptr; 2659 } 2660 2661 ObjectMonitor* java_lang_VirtualThread::current_waiting_monitor(oop vthread) { 2662 ObjectWaiter* waiter = objectWaiter(vthread); 2663 if (waiter != nullptr && waiter->is_wait()) { 2664 return waiter->monitor(); 2665 } 2666 return nullptr; 2667 } 2668 2669 bool java_lang_VirtualThread::is_preempted(oop vthread) { 2670 oop continuation = java_lang_VirtualThread::continuation(vthread); 2671 assert(continuation != nullptr, "vthread with no continuation"); 2672 stackChunkOop chunk = jdk_internal_vm_Continuation::tail(continuation); 2673 return chunk != nullptr && chunk->preempted(); 2674 } 2675 2676 #if INCLUDE_CDS 2677 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) { 2678 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2679 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 2680 } 2681 #endif 2682 2683 // java_lang_Throwable 2684 2685 int java_lang_Throwable::_backtrace_offset; 2686 int java_lang_Throwable::_detailMessage_offset; 2687 int java_lang_Throwable::_stackTrace_offset; 2688 int java_lang_Throwable::_depth_offset; 2689 int java_lang_Throwable::_cause_offset; 2690 int java_lang_Throwable::_static_unassigned_stacktrace_offset; 2691 2692 #define THROWABLE_FIELDS_DO(macro) \ 2693 macro(_backtrace_offset, k, "backtrace", object_signature, false); \ 2694 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \ 2695 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 2696 macro(_depth_offset, k, "depth", int_signature, false); \ 2697 macro(_cause_offset, k, "cause", throwable_signature, false); \ 2698 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 2699 2700 void java_lang_Throwable::compute_offsets() { 2701 InstanceKlass* k = vmClasses::Throwable_klass(); 2702 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2703 } 2704 2705 #if INCLUDE_CDS 2706 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) { 2707 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2708 } 2709 #endif 2710 2711 oop java_lang_Throwable::unassigned_stacktrace() { 2712 InstanceKlass* ik = vmClasses::Throwable_klass(); 2713 oop base = ik->static_field_base_raw(); 2714 return base->obj_field(_static_unassigned_stacktrace_offset); 2715 } 2716 2717 oop java_lang_Throwable::backtrace(oop throwable) { 2718 return throwable->obj_field_acquire(_backtrace_offset); 2719 } 2720 2721 2722 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 2723 throwable->release_obj_field_put(_backtrace_offset, value); 2724 } 2725 2726 int java_lang_Throwable::depth(oop throwable) { 2727 return throwable->int_field(_depth_offset); 2728 } 2729 2730 void java_lang_Throwable::set_depth(oop throwable, int value) { 2731 throwable->int_field_put(_depth_offset, value); 2732 } 2733 2734 oop java_lang_Throwable::message(oop throwable) { 2735 return throwable->obj_field(_detailMessage_offset); 2736 } 2737 2738 const char* java_lang_Throwable::message_as_utf8(oop throwable) { 2739 oop msg = java_lang_Throwable::message(throwable); 2740 const char* msg_utf8 = nullptr; 2741 if (msg != nullptr) { 2742 msg_utf8 = java_lang_String::as_utf8_string(msg); 2743 } 2744 return msg_utf8; 2745 } 2746 2747 oop java_lang_Throwable::cause(oop throwable) { 2748 return throwable->obj_field(_cause_offset); 2749 } 2750 2751 void java_lang_Throwable::set_message(oop throwable, oop value) { 2752 throwable->obj_field_put(_detailMessage_offset, value); 2753 } 2754 2755 2756 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 2757 throwable->obj_field_put(_stackTrace_offset, st_element_array); 2758 } 2759 2760 void java_lang_Throwable::clear_stacktrace(oop throwable) { 2761 set_stacktrace(throwable, nullptr); 2762 } 2763 2764 2765 void java_lang_Throwable::print(oop throwable, outputStream* st) { 2766 ResourceMark rm; 2767 Klass* k = throwable->klass(); 2768 assert(k != nullptr, "just checking"); 2769 st->print("%s", k->external_name()); 2770 oop msg = message(throwable); 2771 if (msg != nullptr) { 2772 st->print(": %s", java_lang_String::as_utf8_string(msg)); 2773 } 2774 } 2775 2776 // After this many redefines, the stack trace is unreliable. 2777 const int MAX_VERSION = USHRT_MAX; 2778 2779 static inline bool version_matches(Method* method, int version) { 2780 assert(version < MAX_VERSION, "version is too big"); 2781 return method != nullptr && (method->constants()->version() == version); 2782 } 2783 2784 // This class provides a simple wrapper over the internal structure of 2785 // exception backtrace to insulate users of the backtrace from needing 2786 // to know what it looks like. 2787 // The code of this class is not GC safe. Allocations can only happen 2788 // in expand(). 2789 class BacktraceBuilder: public StackObj { 2790 friend class BacktraceIterator; 2791 private: 2792 Handle _backtrace; 2793 objArrayOop _head; 2794 typeArrayOop _methods; 2795 typeArrayOop _bcis; 2796 objArrayOop _mirrors; 2797 typeArrayOop _names; // Needed to insulate method name against redefinition. 2798 // True if the top frame of the backtrace is omitted because it shall be hidden. 2799 bool _has_hidden_top_frame; 2800 int _index; 2801 NoSafepointVerifier _nsv; 2802 2803 enum { 2804 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 2805 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 2806 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 2807 trace_names_offset = java_lang_Throwable::trace_names_offset, 2808 trace_conts_offset = java_lang_Throwable::trace_conts_offset, 2809 trace_next_offset = java_lang_Throwable::trace_next_offset, 2810 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset, 2811 trace_size = java_lang_Throwable::trace_size, 2812 trace_chunk_size = java_lang_Throwable::trace_chunk_size 2813 }; 2814 2815 // get info out of chunks 2816 static typeArrayOop get_methods(objArrayHandle chunk) { 2817 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 2818 assert(methods != nullptr, "method array should be initialized in backtrace"); 2819 return methods; 2820 } 2821 static typeArrayOop get_bcis(objArrayHandle chunk) { 2822 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 2823 assert(bcis != nullptr, "bci array should be initialized in backtrace"); 2824 return bcis; 2825 } 2826 static objArrayOop get_mirrors(objArrayHandle chunk) { 2827 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 2828 assert(mirrors != nullptr, "mirror array should be initialized in backtrace"); 2829 return mirrors; 2830 } 2831 static typeArrayOop get_names(objArrayHandle chunk) { 2832 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 2833 assert(names != nullptr, "names array should be initialized in backtrace"); 2834 return names; 2835 } 2836 static bool has_hidden_top_frame(objArrayHandle chunk) { 2837 oop hidden = chunk->obj_at(trace_hidden_offset); 2838 return hidden != nullptr; 2839 } 2840 2841 public: 2842 2843 // constructor for new backtrace 2844 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) { 2845 expand(CHECK); 2846 _backtrace = Handle(THREAD, _head); 2847 _index = 0; 2848 } 2849 2850 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 2851 _methods = get_methods(backtrace); 2852 _bcis = get_bcis(backtrace); 2853 _mirrors = get_mirrors(backtrace); 2854 _names = get_names(backtrace); 2855 _has_hidden_top_frame = has_hidden_top_frame(backtrace); 2856 assert(_methods->length() == _bcis->length() && 2857 _methods->length() == _mirrors->length() && 2858 _mirrors->length() == _names->length(), 2859 "method and source information arrays should match"); 2860 2861 // head is the preallocated backtrace 2862 _head = backtrace(); 2863 _backtrace = Handle(thread, _head); 2864 _index = 0; 2865 } 2866 2867 void expand(TRAPS) { 2868 objArrayHandle old_head(THREAD, _head); 2869 PauseNoSafepointVerifier pnsv(&_nsv); 2870 2871 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2872 objArrayHandle new_head(THREAD, head); 2873 2874 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2875 typeArrayHandle new_methods(THREAD, methods); 2876 2877 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2878 typeArrayHandle new_bcis(THREAD, bcis); 2879 2880 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2881 objArrayHandle new_mirrors(THREAD, mirrors); 2882 2883 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2884 typeArrayHandle new_names(THREAD, names); 2885 2886 if (!old_head.is_null()) { 2887 old_head->obj_at_put(trace_next_offset, new_head()); 2888 } 2889 new_head->obj_at_put(trace_methods_offset, new_methods()); 2890 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2891 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2892 new_head->obj_at_put(trace_names_offset, new_names()); 2893 new_head->obj_at_put(trace_hidden_offset, nullptr); 2894 2895 _head = new_head(); 2896 _methods = new_methods(); 2897 _bcis = new_bcis(); 2898 _mirrors = new_mirrors(); 2899 _names = new_names(); 2900 _index = 0; 2901 } 2902 2903 oop backtrace() { 2904 return _backtrace(); 2905 } 2906 2907 inline void push(Method* method, int bci, TRAPS) { 2908 // Smear the -1 bci to 0 since the array only holds unsigned 2909 // shorts. The later line number lookup would just smear the -1 2910 // to a 0 even if it could be recorded. 2911 if (bci == SynchronizationEntryBCI) bci = 0; 2912 2913 if (_index >= trace_chunk_size) { 2914 methodHandle mhandle(THREAD, method); 2915 expand(CHECK); 2916 method = mhandle(); 2917 } 2918 2919 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2920 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2921 2922 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2923 // klass owning the symbols alive so their refcounts aren't decremented. 2924 Symbol* name = method->name(); 2925 _names->symbol_at_put(_index, name); 2926 2927 // We need to save the mirrors in the backtrace to keep the class 2928 // from being unloaded while we still have this stack trace. 2929 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror"); 2930 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2931 2932 _index++; 2933 } 2934 2935 void set_has_hidden_top_frame() { 2936 if (!_has_hidden_top_frame) { 2937 // It would be nice to add java/lang/Boolean::TRUE here 2938 // to indicate that this backtrace has a hidden top frame. 2939 // But this code is used before TRUE is allocated. 2940 // Therefore let's just use an arbitrary legal oop 2941 // available right here. _methods is a short[]. 2942 assert(_methods != nullptr, "we need a legal oop"); 2943 _has_hidden_top_frame = true; 2944 _head->obj_at_put(trace_hidden_offset, _methods); 2945 } 2946 } 2947 }; 2948 2949 struct BacktraceElement : public StackObj { 2950 int _method_id; 2951 int _bci; 2952 int _version; 2953 Symbol* _name; 2954 Handle _mirror; 2955 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2956 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {} 2957 }; 2958 2959 class BacktraceIterator : public StackObj { 2960 int _index; 2961 objArrayHandle _result; 2962 objArrayHandle _mirrors; 2963 typeArrayHandle _methods; 2964 typeArrayHandle _bcis; 2965 typeArrayHandle _names; 2966 2967 void init(objArrayHandle result, Thread* thread) { 2968 // Get method id, bci, version and mirror from chunk 2969 _result = result; 2970 if (_result.not_null()) { 2971 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2972 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2973 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2974 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2975 _index = 0; 2976 } 2977 } 2978 public: 2979 BacktraceIterator(objArrayHandle result, Thread* thread) { 2980 init(result, thread); 2981 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2982 } 2983 2984 BacktraceElement next(Thread* thread) { 2985 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2986 _methods->ushort_at(_index), 2987 Backtrace::version_at(_bcis->int_at(_index)), 2988 Backtrace::bci_at(_bcis->int_at(_index)), 2989 _names->symbol_at(_index)); 2990 _index++; 2991 2992 if (_index >= java_lang_Throwable::trace_chunk_size) { 2993 int next_offset = java_lang_Throwable::trace_next_offset; 2994 // Get next chunk 2995 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2996 init(result, thread); 2997 } 2998 return e; 2999 } 3000 3001 bool repeat() { 3002 return _result.not_null() && _mirrors->obj_at(_index) != nullptr; 3003 } 3004 }; 3005 3006 3007 // Print stack trace element to resource allocated buffer 3008 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 3009 int version, int bci, Symbol* name) { 3010 ResourceMark rm; 3011 3012 // Get strings and string lengths 3013 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 3014 const char* klass_name = holder->external_name(); 3015 int buf_len = (int)strlen(klass_name); 3016 3017 char* method_name = name->as_C_string(); 3018 buf_len += (int)strlen(method_name); 3019 3020 char* source_file_name = nullptr; 3021 Symbol* source = Backtrace::get_source_file_name(holder, version); 3022 if (source != nullptr) { 3023 source_file_name = source->as_C_string(); 3024 buf_len += (int)strlen(source_file_name); 3025 } 3026 3027 char *module_name = nullptr, *module_version = nullptr; 3028 ModuleEntry* module = holder->module(); 3029 if (module->is_named()) { 3030 module_name = module->name()->as_C_string(); 3031 buf_len += (int)strlen(module_name); 3032 if (module->version() != nullptr) { 3033 module_version = module->version()->as_C_string(); 3034 buf_len += (int)strlen(module_version); 3035 } 3036 } 3037 3038 // Allocate temporary buffer with extra space for formatting and line number 3039 const size_t buf_size = buf_len + 64; 3040 char* buf = NEW_RESOURCE_ARRAY(char, buf_size); 3041 3042 // Print stack trace line in buffer 3043 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name); 3044 3045 // Print module information 3046 if (module_name != nullptr) { 3047 if (module_version != nullptr) { 3048 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version); 3049 } else { 3050 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name); 3051 } 3052 } 3053 3054 // The method can be null if the requested class version is gone 3055 Method* method = holder->method_with_orig_idnum(method_id, version); 3056 if (!version_matches(method, version)) { 3057 strcat(buf, "Redefined)"); 3058 } else { 3059 int line_number = Backtrace::get_line_number(method, bci); 3060 if (line_number == -2) { 3061 strcat(buf, "Native Method)"); 3062 } else { 3063 if (source_file_name != nullptr && (line_number != -1)) { 3064 // Sourcename and linenumber 3065 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number); 3066 } else if (source_file_name != nullptr) { 3067 // Just sourcename 3068 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name); 3069 } else { 3070 // Neither sourcename nor linenumber 3071 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)"); 3072 } 3073 nmethod* nm = method->code(); 3074 if (WizardMode && nm != nullptr) { 3075 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 3076 } 3077 } 3078 } 3079 3080 st->print_cr("%s", buf); 3081 } 3082 3083 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) { 3084 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 3085 int method_id = method->orig_method_idnum(); 3086 int version = method->constants()->version(); 3087 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 3088 } 3089 3090 /** 3091 * Print the throwable message and its stack trace plus all causes by walking the 3092 * cause chain. The output looks the same as of Throwable.printStackTrace(). 3093 */ 3094 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 3095 // First, print the message. 3096 print(throwable(), st); 3097 st->cr(); 3098 3099 // Now print the stack trace. 3100 JavaThread* THREAD = JavaThread::current(); // For exception macros. 3101 while (throwable.not_null()) { 3102 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 3103 if (result.is_null()) { 3104 st->print_raw_cr("\t<<no stack trace available>>"); 3105 return; 3106 } 3107 BacktraceIterator iter(result, THREAD); 3108 3109 while (iter.repeat()) { 3110 BacktraceElement bte = iter.next(THREAD); 3111 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 3112 } 3113 if (THREAD->can_call_java()) { 3114 // Call getCause() which doesn't necessarily return the _cause field. 3115 ExceptionMark em(THREAD); 3116 JavaValue cause(T_OBJECT); 3117 JavaCalls::call_virtual(&cause, 3118 throwable, 3119 throwable->klass(), 3120 vmSymbols::getCause_name(), 3121 vmSymbols::void_throwable_signature(), 3122 THREAD); 3123 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 3124 if (HAS_PENDING_EXCEPTION) { 3125 CLEAR_PENDING_EXCEPTION; 3126 throwable = Handle(); 3127 } else { 3128 throwable = Handle(THREAD, cause.get_oop()); 3129 if (throwable.not_null()) { 3130 st->print("Caused by: "); 3131 print(throwable(), st); 3132 st->cr(); 3133 } 3134 } 3135 } else { 3136 st->print_raw_cr("<<cannot call Java to get cause>>"); 3137 return; 3138 } 3139 } 3140 } 3141 3142 /** 3143 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 3144 */ 3145 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 3146 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected"); 3147 JavaValue result(T_VOID); 3148 JavaCalls::call_virtual(&result, 3149 throwable, 3150 vmClasses::Throwable_klass(), 3151 vmSymbols::printStackTrace_name(), 3152 vmSymbols::void_method_signature(), 3153 THREAD); 3154 } 3155 3156 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 3157 if (!StackTraceInThrowable) return; 3158 ResourceMark rm(THREAD); 3159 3160 // Start out by clearing the backtrace for this object, in case the VM 3161 // runs out of memory while allocating the stack trace 3162 set_backtrace(throwable(), nullptr); 3163 // Clear lazily constructed Java level stacktrace if refilling occurs 3164 // This is unnecessary in 1.7+ but harmless 3165 clear_stacktrace(throwable()); 3166 3167 int max_depth = MaxJavaStackTraceDepth; 3168 JavaThread* thread = THREAD; 3169 3170 BacktraceBuilder bt(CHECK); 3171 3172 // If there is no Java frame just return the method that was being called 3173 // with bci 0 3174 if (!thread->has_last_Java_frame()) { 3175 if (max_depth >= 1 && method() != nullptr) { 3176 bt.push(method(), 0, CHECK); 3177 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 3178 set_depth(throwable(), 1); 3179 set_backtrace(throwable(), bt.backtrace()); 3180 } 3181 return; 3182 } 3183 3184 // Instead of using vframe directly, this version of fill_in_stack_trace 3185 // basically handles everything by hand. This significantly improved the 3186 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 3187 // See bug 6333838 for more details. 3188 // The "ASSERT" here is to verify this method generates the exactly same stack 3189 // trace as utilizing vframe. 3190 #ifdef ASSERT 3191 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */); 3192 #endif 3193 int total_count = 0; 3194 RegisterMap map(thread, 3195 RegisterMap::UpdateMap::skip, 3196 RegisterMap::ProcessFrames::skip, 3197 RegisterMap::WalkContinuation::include); 3198 int decode_offset = 0; 3199 nmethod* nm = nullptr; 3200 bool skip_fillInStackTrace_check = false; 3201 bool skip_throwableInit_check = false; 3202 bool skip_hidden = !ShowHiddenFrames; 3203 bool show_carrier = ShowCarrierFrames; 3204 ContinuationEntry* cont_entry = thread->last_continuation(); 3205 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 3206 Method* method = nullptr; 3207 int bci = 0; 3208 3209 // Compiled java method case. 3210 if (decode_offset != 0) { 3211 DebugInfoReadStream stream(nm, decode_offset); 3212 decode_offset = stream.read_int(); 3213 method = (Method*)nm->metadata_at(stream.read_int()); 3214 bci = stream.read_bci(); 3215 } else { 3216 if (fr.is_first_frame()) break; 3217 3218 if (Continuation::is_continuation_enterSpecial(fr)) { 3219 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), ""); 3220 if (!show_carrier && cont_entry->is_virtual_thread()) { 3221 break; 3222 } 3223 cont_entry = cont_entry->parent(); 3224 } 3225 3226 address pc = fr.pc(); 3227 if (fr.is_interpreted_frame()) { 3228 address bcp; 3229 if (!map.in_cont()) { 3230 bcp = fr.interpreter_frame_bcp(); 3231 method = fr.interpreter_frame_method(); 3232 } else { 3233 bcp = map.stack_chunk()->interpreter_frame_bcp(fr); 3234 method = map.stack_chunk()->interpreter_frame_method(fr); 3235 } 3236 bci = method->bci_from(bcp); 3237 fr = fr.sender(&map); 3238 } else { 3239 CodeBlob* cb = fr.cb(); 3240 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null 3241 // but non nmethod 3242 fr = fr.sender(&map); 3243 if (cb == nullptr || !cb->is_nmethod()) { 3244 continue; 3245 } 3246 nm = cb->as_nmethod(); 3247 assert(nm->method() != nullptr, "must be"); 3248 if (nm->method()->is_native()) { 3249 method = nm->method(); 3250 bci = 0; 3251 } else { 3252 PcDesc* pd = nm->pc_desc_at(pc); 3253 decode_offset = pd->scope_decode_offset(); 3254 // if decode_offset is not equal to 0, it will execute the 3255 // "compiled java method case" at the beginning of the loop. 3256 continue; 3257 } 3258 } 3259 } 3260 #ifdef ASSERT 3261 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace 3262 assert(st.method() == method && st.bci() == bci, "Wrong stack trace"); 3263 st.next(); 3264 } 3265 #endif 3266 3267 // the format of the stacktrace will be: 3268 // - 1 or more fillInStackTrace frames for the exception class (skipped) 3269 // - 0 or more <init> methods for the exception class (skipped) 3270 // - rest of the stack 3271 3272 if (!skip_fillInStackTrace_check) { 3273 if (method->name() == vmSymbols::fillInStackTrace_name() && 3274 throwable->is_a(method->method_holder())) { 3275 continue; 3276 } 3277 else { 3278 skip_fillInStackTrace_check = true; // gone past them all 3279 } 3280 } 3281 if (!skip_throwableInit_check) { 3282 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 3283 3284 // skip <init> methods of the exception class and superclasses 3285 // This is similar to classic VM. 3286 if (method->name() == vmSymbols::object_initializer_name() && 3287 throwable->is_a(method->method_holder())) { 3288 continue; 3289 } else { 3290 // there are none or we've seen them all - either way stop checking 3291 skip_throwableInit_check = true; 3292 } 3293 } 3294 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) { 3295 if (skip_hidden) { 3296 if (total_count == 0) { 3297 // The top frame will be hidden from the stack trace. 3298 bt.set_has_hidden_top_frame(); 3299 } 3300 continue; 3301 } 3302 } 3303 3304 bt.push(method, bci, CHECK); 3305 total_count++; 3306 } 3307 3308 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 3309 3310 // Put completed stack trace into throwable object 3311 set_backtrace(throwable(), bt.backtrace()); 3312 set_depth(throwable(), total_count); 3313 } 3314 3315 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 3316 // No-op if stack trace is disabled 3317 if (!StackTraceInThrowable) { 3318 return; 3319 } 3320 3321 // Disable stack traces for some preallocated out of memory errors 3322 if (!Universe::should_fill_in_stack_trace(throwable)) { 3323 return; 3324 } 3325 3326 JavaThread* THREAD = JavaThread::current(); // For exception macros. 3327 PreserveExceptionMark pm(THREAD); 3328 3329 fill_in_stack_trace(throwable, method, THREAD); 3330 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the 3331 // original exception via the PreserveExceptionMark destructor. 3332 CLEAR_PENDING_EXCEPTION; 3333 } 3334 3335 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 3336 // Allocate stack trace - backtrace is created but not filled in 3337 3338 // No-op if stack trace is disabled 3339 if (!StackTraceInThrowable) return; 3340 BacktraceBuilder bt(CHECK); // creates a backtrace 3341 set_backtrace(throwable(), bt.backtrace()); 3342 } 3343 3344 3345 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 3346 // Fill in stack trace into preallocated backtrace (no GC) 3347 3348 // No-op if stack trace is disabled 3349 if (!StackTraceInThrowable) return; 3350 3351 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check"); 3352 3353 JavaThread* THREAD = JavaThread::current(); // For exception macros. 3354 3355 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 3356 assert(backtrace.not_null(), "backtrace should have been preallocated"); 3357 3358 ResourceMark rm(THREAD); 3359 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */); 3360 3361 BacktraceBuilder bt(THREAD, backtrace); 3362 3363 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 3364 // methods as preallocated errors aren't created by "java" code. 3365 3366 // fill in as much stack trace as possible 3367 int chunk_count = 0; 3368 for (;!st.at_end(); st.next()) { 3369 bt.push(st.method(), st.bci(), CHECK); 3370 chunk_count++; 3371 3372 // Bail-out for deep stacks 3373 if (chunk_count >= trace_chunk_size) break; 3374 } 3375 set_depth(throwable(), chunk_count); 3376 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 3377 3378 // We support the Throwable immutability protocol defined for Java 7. 3379 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 3380 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized"); 3381 } 3382 3383 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace, 3384 objArrayHandle stack_trace_array_h, TRAPS) { 3385 3386 if (backtrace.is_null() || stack_trace_array_h.is_null()) { 3387 THROW(vmSymbols::java_lang_NullPointerException()); 3388 } 3389 3390 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 3391 3392 if (stack_trace_array_h->length() != depth) { 3393 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 3394 } 3395 3396 objArrayHandle result(THREAD, objArrayOop(backtrace())); 3397 BacktraceIterator iter(result, THREAD); 3398 3399 int index = 0; 3400 while (iter.repeat()) { 3401 BacktraceElement bte = iter.next(THREAD); 3402 3403 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 3404 3405 if (stack_trace_element.is_null()) { 3406 THROW(vmSymbols::java_lang_NullPointerException()); 3407 } 3408 3409 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 3410 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 3411 3412 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 3413 method, 3414 bte._version, 3415 bte._bci, 3416 bte._name, 3417 CHECK); 3418 } 3419 } 3420 3421 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) { 3422 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization 3423 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive 3424 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and 3425 // symbolic stacktrace of 'throwable'. 3426 assert(throwable.not_null(), "shouldn't be"); 3427 3428 // Now create the message from the original exception and thread name. 3429 ResourceMark rm(current); 3430 const char *message = nullptr; 3431 oop detailed_message = java_lang_Throwable::message(throwable()); 3432 if (detailed_message != nullptr) { 3433 message = java_lang_String::as_utf8_string(detailed_message); 3434 } 3435 stringStream st; 3436 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(), 3437 message == nullptr ? "" : ":"); 3438 if (message == nullptr) { 3439 st.print("[in thread \"%s\"]", current->name()); 3440 } else { 3441 st.print("%s [in thread \"%s\"]", message, current->name()); 3442 } 3443 3444 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError(); 3445 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string()); 3446 // If new_exception returns a different exception while creating the exception, 3447 // abandon the attempt to save the initialization error and return null. 3448 if (init_error->klass()->name() != exception_name) { 3449 log_info(class, init)("Exception %s thrown while saving initialization exception", 3450 init_error->klass()->external_name()); 3451 return Handle(); 3452 } 3453 3454 // Call to java to fill in the stack trace and clear declaringClassObject to 3455 // not keep classes alive in the stack trace. 3456 // call this: public StackTraceElement[] getStackTrace() 3457 JavaValue result(T_ARRAY); 3458 JavaCalls::call_virtual(&result, throwable, 3459 vmClasses::Throwable_klass(), 3460 vmSymbols::getStackTrace_name(), 3461 vmSymbols::getStackTrace_signature(), 3462 current); 3463 if (!current->has_pending_exception()){ 3464 Handle stack_trace(current, result.get_oop()); 3465 assert(stack_trace->is_objArray(), "Should be an array"); 3466 java_lang_Throwable::set_stacktrace(init_error(), stack_trace()); 3467 // Clear backtrace because the stacktrace should be used instead. 3468 set_backtrace(init_error(), nullptr); 3469 } else { 3470 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s", 3471 init_error->klass()->external_name()); 3472 current->clear_pending_exception(); 3473 } 3474 3475 return init_error; 3476 } 3477 3478 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) { 3479 JavaThread* current = JavaThread::current(); 3480 objArrayHandle result(current, objArrayOop(backtrace(throwable))); 3481 BacktraceIterator iter(result, current); 3482 // No backtrace available. 3483 if (!iter.repeat()) return false; 3484 3485 // If the exception happened in a frame that has been hidden, i.e., 3486 // omitted from the back trace, we can not compute the message. 3487 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset); 3488 if (hidden != nullptr) { 3489 return false; 3490 } 3491 3492 // Get first backtrace element. 3493 BacktraceElement bte = iter.next(current); 3494 3495 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 3496 assert(holder != nullptr, "first element should be non-null"); 3497 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version); 3498 3499 // Original version is no longer available. 3500 if (m == nullptr || !version_matches(m, bte._version)) { 3501 return false; 3502 } 3503 3504 *method = m; 3505 *bci = bte._bci; 3506 return true; 3507 } 3508 3509 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 3510 // Allocate java.lang.StackTraceElement instance 3511 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 3512 assert(k != nullptr, "must be loaded in 1.4+"); 3513 if (k->should_be_initialized()) { 3514 k->initialize(CHECK_NULL); 3515 } 3516 3517 Handle element = k->allocate_instance_handle(CHECK_NULL); 3518 3519 int version = method->constants()->version(); 3520 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL); 3521 return element(); 3522 } 3523 3524 void java_lang_StackTraceElement::fill_in(Handle element, 3525 InstanceKlass* holder, const methodHandle& method, 3526 int version, int bci, Symbol* name, TRAPS) { 3527 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check"); 3528 3529 ResourceMark rm(THREAD); 3530 HandleMark hm(THREAD); 3531 3532 // Fill in class name 3533 Handle java_class(THREAD, holder->java_mirror()); 3534 oop classname = java_lang_Class::name(java_class, CHECK); 3535 java_lang_StackTraceElement::set_declaringClass(element(), classname); 3536 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class()); 3537 3538 oop loader = holder->class_loader(); 3539 if (loader != nullptr) { 3540 oop loader_name = java_lang_ClassLoader::name(loader); 3541 if (loader_name != nullptr) 3542 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 3543 } 3544 3545 // Fill in method name 3546 oop methodname = StringTable::intern(name, CHECK); 3547 java_lang_StackTraceElement::set_methodName(element(), methodname); 3548 3549 // Fill in module name and version 3550 ModuleEntry* module = holder->module(); 3551 if (module->is_named()) { 3552 oop module_name = StringTable::intern(module->name(), CHECK); 3553 java_lang_StackTraceElement::set_moduleName(element(), module_name); 3554 oop module_version; 3555 if (module->version() != nullptr) { 3556 module_version = StringTable::intern(module->version(), CHECK); 3557 } else { 3558 module_version = nullptr; 3559 } 3560 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 3561 } 3562 3563 if (method() == nullptr || !version_matches(method(), version)) { 3564 // The method was redefined, accurate line number information isn't available 3565 java_lang_StackTraceElement::set_fileName(element(), nullptr); 3566 java_lang_StackTraceElement::set_lineNumber(element(), -1); 3567 } else { 3568 Symbol* source; 3569 oop source_file; 3570 int line_number; 3571 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK); 3572 3573 java_lang_StackTraceElement::set_fileName(element(), source_file); 3574 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 3575 } 3576 } 3577 3578 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class, 3579 InstanceKlass* holder, 3580 int version, 3581 const methodHandle& method, 3582 int bci, 3583 Symbol*& source, 3584 oop& source_file, 3585 int& line_number, TRAPS) { 3586 // Fill in source file name and line number. 3587 source = Backtrace::get_source_file_name(holder, version); 3588 source_file = java_lang_Class::source_file(java_class()); 3589 if (source != nullptr) { 3590 // Class was not redefined. We can trust its cache if set, 3591 // else we have to initialize it. 3592 if (source_file == nullptr) { 3593 source_file = StringTable::intern(source, CHECK); 3594 java_lang_Class::set_source_file(java_class(), source_file); 3595 } 3596 } else { 3597 // Class was redefined. Dump the cache if it was set. 3598 if (source_file != nullptr) { 3599 source_file = nullptr; 3600 java_lang_Class::set_source_file(java_class(), source_file); 3601 } 3602 } 3603 line_number = Backtrace::get_line_number(method(), bci); 3604 } 3605 3606 #if INCLUDE_JVMCI 3607 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci, 3608 Symbol*& filename, int& line_number, TRAPS) { 3609 ResourceMark rm(THREAD); 3610 HandleMark hm(THREAD); 3611 3612 filename = nullptr; 3613 line_number = -1; 3614 3615 oop source_file; 3616 int version = method->constants()->version(); 3617 InstanceKlass* holder = method->method_holder(); 3618 Handle java_class(THREAD, holder->java_mirror()); 3619 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK); 3620 } 3621 #endif // INCLUDE_JVMCI 3622 3623 // java_lang_ClassFrameInfo 3624 3625 int java_lang_ClassFrameInfo::_classOrMemberName_offset; 3626 int java_lang_ClassFrameInfo::_flags_offset; 3627 3628 #define CLASSFRAMEINFO_FIELDS_DO(macro) \ 3629 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \ 3630 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false) 3631 3632 void java_lang_ClassFrameInfo::compute_offsets() { 3633 InstanceKlass* k = vmClasses::ClassFrameInfo_klass(); 3634 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3635 } 3636 3637 #if INCLUDE_CDS 3638 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) { 3639 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3640 } 3641 #endif 3642 3643 static int get_flags(const methodHandle& m) { 3644 int flags = m->access_flags().as_method_flags(); 3645 if (m->is_object_initializer()) { 3646 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR; 3647 } else { 3648 // Note: Static initializers can be here. Record them as plain methods. 3649 flags |= java_lang_invoke_MemberName::MN_IS_METHOD; 3650 } 3651 if (m->caller_sensitive()) { 3652 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE; 3653 } 3654 if (m->is_hidden()) { 3655 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER; 3656 } 3657 assert((flags & 0xFF000000) == 0, "unexpected flags"); 3658 return flags; 3659 } 3660 3661 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) { 3662 return obj->obj_field(_classOrMemberName_offset); 3663 } 3664 3665 int java_lang_ClassFrameInfo::flags(oop obj) { 3666 return obj->int_field(_flags_offset); 3667 } 3668 3669 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) { 3670 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror()); 3671 // flags is initialized when ClassFrameInfo object is constructed and retain the value 3672 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m); 3673 stackFrame->int_field_put(_flags_offset, flags); 3674 } 3675 3676 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) { 3677 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK); 3678 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name); 3679 // flags is initialized when ClassFrameInfo object is constructed and retain the value 3680 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m); 3681 stackFrame->int_field_put(_flags_offset, flags); 3682 } 3683 3684 3685 // java_lang_StackFrameInfo 3686 3687 int java_lang_StackFrameInfo::_type_offset; 3688 int java_lang_StackFrameInfo::_name_offset; 3689 int java_lang_StackFrameInfo::_bci_offset; 3690 int java_lang_StackFrameInfo::_version_offset; 3691 int java_lang_StackFrameInfo::_contScope_offset; 3692 3693 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 3694 macro(_type_offset, k, "type", object_signature, false); \ 3695 macro(_name_offset, k, "name", string_signature, false); \ 3696 macro(_bci_offset, k, "bci", int_signature, false); \ 3697 macro(_contScope_offset, k, "contScope", continuationscope_signature, false) 3698 3699 void java_lang_StackFrameInfo::compute_offsets() { 3700 InstanceKlass* k = vmClasses::StackFrameInfo_klass(); 3701 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3702 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3703 } 3704 3705 #if INCLUDE_CDS 3706 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) { 3707 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3708 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3709 } 3710 #endif 3711 3712 Method* java_lang_StackFrameInfo::get_method(oop obj) { 3713 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj); 3714 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m); 3715 return method; 3716 } 3717 3718 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) { 3719 // set Method* or mid/cpref 3720 HandleMark hm(THREAD); 3721 Handle cont_h(THREAD, cont); 3722 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK); 3723 3724 // set bci 3725 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 3726 // method may be redefined; store the version 3727 int version = method->constants()->version(); 3728 assert((jushort)version == version, "version should be short"); 3729 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 3730 3731 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr; 3732 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope); 3733 } 3734 3735 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 3736 ResourceMark rm(THREAD); 3737 HandleMark hm(THREAD); 3738 3739 Method* method = java_lang_StackFrameInfo::get_method(stackFrame()); 3740 InstanceKlass* holder = method->method_holder(); 3741 short version = stackFrame->short_field(_version_offset); 3742 int bci = stackFrame->int_field(_bci_offset); 3743 Symbol* name = method->name(); 3744 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK); 3745 } 3746 3747 oop java_lang_StackFrameInfo::type(oop obj) { 3748 return obj->obj_field(_type_offset); 3749 } 3750 3751 void java_lang_StackFrameInfo::set_type(oop obj, oop value) { 3752 obj->obj_field_put(_type_offset, value); 3753 } 3754 3755 oop java_lang_StackFrameInfo::name(oop obj) { 3756 return obj->obj_field(_name_offset); 3757 } 3758 3759 void java_lang_StackFrameInfo::set_name(oop obj, oop value) { 3760 obj->obj_field_put(_name_offset, value); 3761 } 3762 3763 void java_lang_StackFrameInfo::set_version(oop obj, short value) { 3764 obj->short_field_put(_version_offset, value); 3765 } 3766 3767 void java_lang_StackFrameInfo::set_bci(oop obj, int value) { 3768 assert(value >= 0 && value < max_jushort, "must be a valid bci value"); 3769 obj->int_field_put(_bci_offset, value); 3770 } 3771 3772 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) { 3773 obj->obj_field_put(_contScope_offset, value); 3774 } 3775 3776 int java_lang_LiveStackFrameInfo::_monitors_offset; 3777 int java_lang_LiveStackFrameInfo::_locals_offset; 3778 int java_lang_LiveStackFrameInfo::_operands_offset; 3779 int java_lang_LiveStackFrameInfo::_mode_offset; 3780 3781 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 3782 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 3783 macro(_locals_offset, k, "locals", object_array_signature, false); \ 3784 macro(_operands_offset, k, "operands", object_array_signature, false); \ 3785 macro(_mode_offset, k, "mode", int_signature, false) 3786 3787 void java_lang_LiveStackFrameInfo::compute_offsets() { 3788 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass(); 3789 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3790 } 3791 3792 #if INCLUDE_CDS 3793 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) { 3794 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3795 } 3796 #endif 3797 3798 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) { 3799 obj->obj_field_put(_monitors_offset, value); 3800 } 3801 3802 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) { 3803 obj->obj_field_put(_locals_offset, value); 3804 } 3805 3806 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) { 3807 obj->obj_field_put(_operands_offset, value); 3808 } 3809 3810 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) { 3811 obj->int_field_put(_mode_offset, value); 3812 } 3813 3814 // java_lang_AccessibleObject 3815 3816 int java_lang_reflect_AccessibleObject::_override_offset; 3817 3818 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 3819 macro(_override_offset, k, "override", bool_signature, false) 3820 3821 void java_lang_reflect_AccessibleObject::compute_offsets() { 3822 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass(); 3823 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3824 } 3825 3826 #if INCLUDE_CDS 3827 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) { 3828 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3829 } 3830 #endif 3831 3832 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 3833 return (jboolean) reflect->bool_field(_override_offset); 3834 } 3835 3836 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 3837 reflect->bool_field_put(_override_offset, (int) value); 3838 } 3839 3840 // java_lang_reflect_Method 3841 3842 int java_lang_reflect_Method::_clazz_offset; 3843 int java_lang_reflect_Method::_name_offset; 3844 int java_lang_reflect_Method::_returnType_offset; 3845 int java_lang_reflect_Method::_parameterTypes_offset; 3846 int java_lang_reflect_Method::_exceptionTypes_offset; 3847 int java_lang_reflect_Method::_slot_offset; 3848 int java_lang_reflect_Method::_modifiers_offset; 3849 int java_lang_reflect_Method::_signature_offset; 3850 int java_lang_reflect_Method::_annotations_offset; 3851 int java_lang_reflect_Method::_parameter_annotations_offset; 3852 int java_lang_reflect_Method::_annotation_default_offset; 3853 3854 #define METHOD_FIELDS_DO(macro) \ 3855 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3856 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3857 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 3858 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 3859 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 3860 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3861 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3862 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3863 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 3864 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \ 3865 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false); 3866 3867 void java_lang_reflect_Method::compute_offsets() { 3868 InstanceKlass* k = vmClasses::reflect_Method_klass(); 3869 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3870 } 3871 3872 #if INCLUDE_CDS 3873 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) { 3874 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3875 } 3876 #endif 3877 3878 Handle java_lang_reflect_Method::create(TRAPS) { 3879 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3880 Klass* klass = vmClasses::reflect_Method_klass(); 3881 // This class is eagerly initialized during VM initialization, since we keep a reference 3882 // to one of the methods 3883 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 3884 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 3885 } 3886 3887 oop java_lang_reflect_Method::clazz(oop reflect) { 3888 return reflect->obj_field(_clazz_offset); 3889 } 3890 3891 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 3892 reflect->obj_field_put(_clazz_offset, value); 3893 } 3894 3895 int java_lang_reflect_Method::slot(oop reflect) { 3896 return reflect->int_field(_slot_offset); 3897 } 3898 3899 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 3900 reflect->int_field_put(_slot_offset, value); 3901 } 3902 3903 void java_lang_reflect_Method::set_name(oop method, oop value) { 3904 method->obj_field_put(_name_offset, value); 3905 } 3906 3907 oop java_lang_reflect_Method::return_type(oop method) { 3908 return method->obj_field(_returnType_offset); 3909 } 3910 3911 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 3912 method->obj_field_put(_returnType_offset, value); 3913 } 3914 3915 oop java_lang_reflect_Method::parameter_types(oop method) { 3916 return method->obj_field(_parameterTypes_offset); 3917 } 3918 3919 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 3920 method->obj_field_put(_parameterTypes_offset, value); 3921 } 3922 3923 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 3924 method->obj_field_put(_exceptionTypes_offset, value); 3925 } 3926 3927 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 3928 method->int_field_put(_modifiers_offset, value); 3929 } 3930 3931 void java_lang_reflect_Method::set_signature(oop method, oop value) { 3932 method->obj_field_put(_signature_offset, value); 3933 } 3934 3935 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 3936 method->obj_field_put(_annotations_offset, value); 3937 } 3938 3939 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 3940 method->obj_field_put(_parameter_annotations_offset, value); 3941 } 3942 3943 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 3944 method->obj_field_put(_annotation_default_offset, value); 3945 } 3946 3947 int java_lang_reflect_Constructor::_clazz_offset; 3948 int java_lang_reflect_Constructor::_parameterTypes_offset; 3949 int java_lang_reflect_Constructor::_exceptionTypes_offset; 3950 int java_lang_reflect_Constructor::_slot_offset; 3951 int java_lang_reflect_Constructor::_modifiers_offset; 3952 int java_lang_reflect_Constructor::_signature_offset; 3953 int java_lang_reflect_Constructor::_annotations_offset; 3954 int java_lang_reflect_Constructor::_parameter_annotations_offset; 3955 3956 #define CONSTRUCTOR_FIELDS_DO(macro) \ 3957 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3958 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 3959 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 3960 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3961 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3962 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3963 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 3964 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); 3965 3966 void java_lang_reflect_Constructor::compute_offsets() { 3967 InstanceKlass* k = vmClasses::reflect_Constructor_klass(); 3968 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3969 } 3970 3971 #if INCLUDE_CDS 3972 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) { 3973 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3974 } 3975 #endif 3976 3977 Handle java_lang_reflect_Constructor::create(TRAPS) { 3978 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3979 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 3980 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3981 InstanceKlass* ik = InstanceKlass::cast(k); 3982 // Ensure it is initialized 3983 ik->initialize(CHECK_NH); 3984 return ik->allocate_instance_handle(THREAD); 3985 } 3986 3987 oop java_lang_reflect_Constructor::clazz(oop reflect) { 3988 return reflect->obj_field(_clazz_offset); 3989 } 3990 3991 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 3992 reflect->obj_field_put(_clazz_offset, value); 3993 } 3994 3995 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 3996 return constructor->obj_field(_parameterTypes_offset); 3997 } 3998 3999 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 4000 constructor->obj_field_put(_parameterTypes_offset, value); 4001 } 4002 4003 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 4004 constructor->obj_field_put(_exceptionTypes_offset, value); 4005 } 4006 4007 int java_lang_reflect_Constructor::slot(oop reflect) { 4008 return reflect->int_field(_slot_offset); 4009 } 4010 4011 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 4012 reflect->int_field_put(_slot_offset, value); 4013 } 4014 4015 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 4016 constructor->int_field_put(_modifiers_offset, value); 4017 } 4018 4019 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 4020 constructor->obj_field_put(_signature_offset, value); 4021 } 4022 4023 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 4024 constructor->obj_field_put(_annotations_offset, value); 4025 } 4026 4027 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 4028 method->obj_field_put(_parameter_annotations_offset, value); 4029 } 4030 4031 int java_lang_reflect_Field::_clazz_offset; 4032 int java_lang_reflect_Field::_name_offset; 4033 int java_lang_reflect_Field::_type_offset; 4034 int java_lang_reflect_Field::_slot_offset; 4035 int java_lang_reflect_Field::_modifiers_offset; 4036 int java_lang_reflect_Field::_trusted_final_offset; 4037 int java_lang_reflect_Field::_signature_offset; 4038 int java_lang_reflect_Field::_annotations_offset; 4039 4040 #define FIELD_FIELDS_DO(macro) \ 4041 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 4042 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 4043 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \ 4044 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 4045 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 4046 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \ 4047 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 4048 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); 4049 4050 void java_lang_reflect_Field::compute_offsets() { 4051 InstanceKlass* k = vmClasses::reflect_Field_klass(); 4052 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4053 } 4054 4055 #if INCLUDE_CDS 4056 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) { 4057 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4058 } 4059 #endif 4060 4061 Handle java_lang_reflect_Field::create(TRAPS) { 4062 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 4063 Symbol* name = vmSymbols::java_lang_reflect_Field(); 4064 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 4065 InstanceKlass* ik = InstanceKlass::cast(k); 4066 // Ensure it is initialized 4067 ik->initialize(CHECK_NH); 4068 return ik->allocate_instance_handle(THREAD); 4069 } 4070 4071 oop java_lang_reflect_Field::clazz(oop reflect) { 4072 return reflect->obj_field(_clazz_offset); 4073 } 4074 4075 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 4076 reflect->obj_field_put(_clazz_offset, value); 4077 } 4078 4079 oop java_lang_reflect_Field::name(oop field) { 4080 return field->obj_field(_name_offset); 4081 } 4082 4083 void java_lang_reflect_Field::set_name(oop field, oop value) { 4084 field->obj_field_put(_name_offset, value); 4085 } 4086 4087 oop java_lang_reflect_Field::type(oop field) { 4088 return field->obj_field(_type_offset); 4089 } 4090 4091 void java_lang_reflect_Field::set_type(oop field, oop value) { 4092 field->obj_field_put(_type_offset, value); 4093 } 4094 4095 int java_lang_reflect_Field::slot(oop reflect) { 4096 return reflect->int_field(_slot_offset); 4097 } 4098 4099 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 4100 reflect->int_field_put(_slot_offset, value); 4101 } 4102 4103 int java_lang_reflect_Field::modifiers(oop field) { 4104 return field->int_field(_modifiers_offset); 4105 } 4106 4107 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 4108 field->int_field_put(_modifiers_offset, value); 4109 } 4110 4111 void java_lang_reflect_Field::set_trusted_final(oop field) { 4112 field->bool_field_put(_trusted_final_offset, true); 4113 } 4114 4115 void java_lang_reflect_Field::set_signature(oop field, oop value) { 4116 field->obj_field_put(_signature_offset, value); 4117 } 4118 4119 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 4120 field->obj_field_put(_annotations_offset, value); 4121 } 4122 4123 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) { 4124 // Allocate java.lang.reflect.RecordComponent instance 4125 HandleMark hm(THREAD); 4126 InstanceKlass* ik = vmClasses::RecordComponent_klass(); 4127 assert(ik != nullptr, "must be loaded"); 4128 ik->initialize(CHECK_NULL); 4129 4130 Handle element = ik->allocate_instance_handle(CHECK_NULL); 4131 4132 Handle decl_class(THREAD, holder->java_mirror()); 4133 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class()); 4134 4135 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8 4136 oop component_name = StringTable::intern(name, CHECK_NULL); 4137 java_lang_reflect_RecordComponent::set_name(element(), component_name); 4138 4139 Symbol* type = holder->constants()->symbol_at(component->descriptor_index()); 4140 Handle component_type_h = 4141 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL); 4142 java_lang_reflect_RecordComponent::set_type(element(), component_type_h()); 4143 4144 Method* accessor_method = nullptr; 4145 { 4146 // Prepend "()" to type to create the full method signature. 4147 ResourceMark rm(THREAD); 4148 int sig_len = type->utf8_length() + 3; // "()" and null char 4149 char* sig = NEW_RESOURCE_ARRAY(char, sig_len); 4150 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string()); 4151 TempNewSymbol full_sig = SymbolTable::new_symbol(sig); 4152 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find); 4153 } 4154 4155 if (accessor_method != nullptr) { 4156 methodHandle method(THREAD, accessor_method); 4157 oop m = Reflection::new_method(method, false, CHECK_NULL); 4158 java_lang_reflect_RecordComponent::set_accessor(element(), m); 4159 } else { 4160 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr); 4161 } 4162 4163 int sig_index = component->generic_signature_index(); 4164 if (sig_index > 0) { 4165 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8 4166 oop component_sig = StringTable::intern(sig, CHECK_NULL); 4167 java_lang_reflect_RecordComponent::set_signature(element(), component_sig); 4168 } else { 4169 java_lang_reflect_RecordComponent::set_signature(element(), nullptr); 4170 } 4171 4172 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL); 4173 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop); 4174 4175 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL); 4176 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop); 4177 4178 return element(); 4179 } 4180 4181 int reflect_ConstantPool::_oop_offset; 4182 4183 #define CONSTANTPOOL_FIELDS_DO(macro) \ 4184 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 4185 4186 void reflect_ConstantPool::compute_offsets() { 4187 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass(); 4188 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 4189 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4190 } 4191 4192 #if INCLUDE_CDS 4193 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) { 4194 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4195 } 4196 #endif 4197 4198 int java_lang_reflect_Parameter::_name_offset; 4199 int java_lang_reflect_Parameter::_modifiers_offset; 4200 int java_lang_reflect_Parameter::_index_offset; 4201 int java_lang_reflect_Parameter::_executable_offset; 4202 4203 #define PARAMETER_FIELDS_DO(macro) \ 4204 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 4205 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 4206 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \ 4207 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 4208 4209 void java_lang_reflect_Parameter::compute_offsets() { 4210 InstanceKlass* k = vmClasses::reflect_Parameter_klass(); 4211 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4212 } 4213 4214 #if INCLUDE_CDS 4215 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) { 4216 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4217 } 4218 #endif 4219 4220 Handle java_lang_reflect_Parameter::create(TRAPS) { 4221 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 4222 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 4223 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 4224 InstanceKlass* ik = InstanceKlass::cast(k); 4225 // Ensure it is initialized 4226 ik->initialize(CHECK_NH); 4227 return ik->allocate_instance_handle(THREAD); 4228 } 4229 4230 oop java_lang_reflect_Parameter::name(oop param) { 4231 return param->obj_field(_name_offset); 4232 } 4233 4234 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 4235 param->obj_field_put(_name_offset, value); 4236 } 4237 4238 int java_lang_reflect_Parameter::modifiers(oop param) { 4239 return param->int_field(_modifiers_offset); 4240 } 4241 4242 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 4243 param->int_field_put(_modifiers_offset, value); 4244 } 4245 4246 int java_lang_reflect_Parameter::index(oop param) { 4247 return param->int_field(_index_offset); 4248 } 4249 4250 void java_lang_reflect_Parameter::set_index(oop param, int value) { 4251 param->int_field_put(_index_offset, value); 4252 } 4253 4254 oop java_lang_reflect_Parameter::executable(oop param) { 4255 return param->obj_field(_executable_offset); 4256 } 4257 4258 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 4259 param->obj_field_put(_executable_offset, value); 4260 } 4261 4262 // java_lang_Module 4263 4264 int java_lang_Module::_loader_offset; 4265 int java_lang_Module::_name_offset; 4266 int java_lang_Module::_module_entry_offset; 4267 4268 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 4269 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 4270 return JavaCalls::construct_new_instance(vmClasses::Module_klass(), 4271 vmSymbols::java_lang_module_init_signature(), 4272 loader, module_name, CHECK_NH); 4273 } 4274 4275 #define MODULE_FIELDS_DO(macro) \ 4276 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 4277 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false) 4278 4279 void java_lang_Module::compute_offsets() { 4280 InstanceKlass* k = vmClasses::Module_klass(); 4281 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4282 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4283 } 4284 4285 #if INCLUDE_CDS 4286 void java_lang_Module::serialize_offsets(SerializeClosure* f) { 4287 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4288 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4289 } 4290 #endif 4291 4292 oop java_lang_Module::loader(oop module) { 4293 return module->obj_field(_loader_offset); 4294 } 4295 4296 void java_lang_Module::set_loader(oop module, oop value) { 4297 module->obj_field_put(_loader_offset, value); 4298 } 4299 4300 oop java_lang_Module::name(oop module) { 4301 return module->obj_field(_name_offset); 4302 } 4303 4304 void java_lang_Module::set_name(oop module, oop value) { 4305 module->obj_field_put(_name_offset, value); 4306 } 4307 4308 ModuleEntry* java_lang_Module::module_entry_raw(oop module) { 4309 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 4310 assert(module != nullptr, "module can't be null"); 4311 assert(oopDesc::is_oop(module), "module must be oop"); 4312 4313 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 4314 return module_entry; 4315 } 4316 4317 ModuleEntry* java_lang_Module::module_entry(oop module) { 4318 ModuleEntry* module_entry = module_entry_raw(module); 4319 if (module_entry == nullptr) { 4320 // If the inject field containing the ModuleEntry* is null then return the 4321 // class loader's unnamed module. 4322 oop loader = java_lang_Module::loader(module); 4323 Handle h_loader = Handle(Thread::current(), loader); 4324 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 4325 return loader_cld->unnamed_module(); 4326 } 4327 return module_entry; 4328 } 4329 4330 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 4331 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 4332 assert(module != nullptr, "module can't be null"); 4333 assert(oopDesc::is_oop(module), "module must be oop"); 4334 module->address_field_put(_module_entry_offset, (address)module_entry); 4335 } 4336 4337 Handle reflect_ConstantPool::create(TRAPS) { 4338 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 4339 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass(); 4340 // Ensure it is initialized 4341 k->initialize(CHECK_NH); 4342 return k->allocate_instance_handle(THREAD); 4343 } 4344 4345 4346 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 4347 oop mirror = value->pool_holder()->java_mirror(); 4348 // Save the mirror to get back the constant pool. 4349 reflect->obj_field_put(_oop_offset, mirror); 4350 } 4351 4352 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 4353 4354 oop mirror = reflect->obj_field(_oop_offset); 4355 Klass* k = java_lang_Class::as_Klass(mirror); 4356 assert(k->is_instance_klass(), "Must be"); 4357 4358 // Get the constant pool back from the klass. Since class redefinition 4359 // merges the new constant pool into the old, this is essentially the 4360 // same constant pool as the original. If constant pool merging is 4361 // no longer done in the future, this will have to change to save 4362 // the original. 4363 return InstanceKlass::cast(k)->constants(); 4364 } 4365 4366 4367 // Support for java_lang_ref_Reference 4368 4369 bool java_lang_ref_Reference::_offsets_initialized; 4370 4371 int java_lang_ref_Reference::_referent_offset; 4372 int java_lang_ref_Reference::_queue_offset; 4373 int java_lang_ref_Reference::_next_offset; 4374 int java_lang_ref_Reference::_discovered_offset; 4375 4376 #define REFERENCE_FIELDS_DO(macro) \ 4377 macro(_referent_offset, k, "referent", object_signature, false); \ 4378 macro(_queue_offset, k, "queue", referencequeue_signature, false); \ 4379 macro(_next_offset, k, "next", reference_signature, false); \ 4380 macro(_discovered_offset, k, "discovered", reference_signature, false); 4381 4382 void java_lang_ref_Reference::compute_offsets() { 4383 if (_offsets_initialized) { 4384 return; 4385 } 4386 _offsets_initialized = true; 4387 InstanceKlass* k = vmClasses::Reference_klass(); 4388 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4389 } 4390 4391 #if INCLUDE_CDS 4392 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) { 4393 f->do_bool(&_offsets_initialized); 4394 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4395 } 4396 #endif 4397 4398 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 4399 assert(obj != nullptr, "sanity"); 4400 if (offset != _referent_offset) { 4401 return false; 4402 } 4403 4404 Klass* k = obj->klass(); 4405 if (!k->is_instance_klass()) { 4406 return false; 4407 } 4408 4409 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 4410 bool is_reference = ik->reference_type() != REF_NONE; 4411 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity"); 4412 return is_reference; 4413 } 4414 4415 int java_lang_boxing_object::_value_offset; 4416 int java_lang_boxing_object::_long_value_offset; 4417 4418 #define BOXING_FIELDS_DO(macro) \ 4419 macro(_value_offset, integerKlass, "value", int_signature, false); \ 4420 macro(_long_value_offset, longKlass, "value", long_signature, false); 4421 4422 void java_lang_boxing_object::compute_offsets() { 4423 InstanceKlass* integerKlass = vmClasses::Integer_klass(); 4424 InstanceKlass* longKlass = vmClasses::Long_klass(); 4425 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4426 } 4427 4428 #if INCLUDE_CDS 4429 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) { 4430 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4431 } 4432 #endif 4433 4434 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 4435 Klass* k = vmClasses::box_klass(type); 4436 if (k == nullptr) return nullptr; 4437 InstanceKlass* ik = InstanceKlass::cast(k); 4438 if (!ik->is_initialized()) { 4439 ik->initialize(CHECK_NULL); 4440 } 4441 return ik->allocate_instance(THREAD); 4442 } 4443 4444 4445 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 4446 oop box = initialize_and_allocate(type, CHECK_NULL); 4447 if (box == nullptr) return nullptr; 4448 switch (type) { 4449 case T_BOOLEAN: 4450 box->bool_field_put(_value_offset, value->z); 4451 break; 4452 case T_CHAR: 4453 box->char_field_put(_value_offset, value->c); 4454 break; 4455 case T_FLOAT: 4456 box->float_field_put(_value_offset, value->f); 4457 break; 4458 case T_DOUBLE: 4459 box->double_field_put(_long_value_offset, value->d); 4460 break; 4461 case T_BYTE: 4462 box->byte_field_put(_value_offset, value->b); 4463 break; 4464 case T_SHORT: 4465 box->short_field_put(_value_offset, value->s); 4466 break; 4467 case T_INT: 4468 box->int_field_put(_value_offset, value->i); 4469 break; 4470 case T_LONG: 4471 box->long_field_put(_long_value_offset, value->j); 4472 break; 4473 default: 4474 return nullptr; 4475 } 4476 return box; 4477 } 4478 4479 4480 BasicType java_lang_boxing_object::basic_type(oop box) { 4481 if (box == nullptr) return T_ILLEGAL; 4482 BasicType type = vmClasses::box_klass_type(box->klass()); 4483 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 4484 return T_ILLEGAL; 4485 return type; 4486 } 4487 4488 4489 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 4490 BasicType type = vmClasses::box_klass_type(box->klass()); 4491 switch (type) { 4492 case T_BOOLEAN: 4493 value->z = box->bool_field(_value_offset); 4494 break; 4495 case T_CHAR: 4496 value->c = box->char_field(_value_offset); 4497 break; 4498 case T_FLOAT: 4499 value->f = box->float_field(_value_offset); 4500 break; 4501 case T_DOUBLE: 4502 value->d = box->double_field(_long_value_offset); 4503 break; 4504 case T_BYTE: 4505 value->b = box->byte_field(_value_offset); 4506 break; 4507 case T_SHORT: 4508 value->s = box->short_field(_value_offset); 4509 break; 4510 case T_INT: 4511 value->i = box->int_field(_value_offset); 4512 break; 4513 case T_LONG: 4514 value->j = box->long_field(_long_value_offset); 4515 break; 4516 default: 4517 return T_ILLEGAL; 4518 } // end switch 4519 return type; 4520 } 4521 4522 4523 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 4524 BasicType type = vmClasses::box_klass_type(box->klass()); 4525 switch (type) { 4526 case T_BOOLEAN: 4527 box->bool_field_put(_value_offset, value->z); 4528 break; 4529 case T_CHAR: 4530 box->char_field_put(_value_offset, value->c); 4531 break; 4532 case T_FLOAT: 4533 box->float_field_put(_value_offset, value->f); 4534 break; 4535 case T_DOUBLE: 4536 box->double_field_put(_long_value_offset, value->d); 4537 break; 4538 case T_BYTE: 4539 box->byte_field_put(_value_offset, value->b); 4540 break; 4541 case T_SHORT: 4542 box->short_field_put(_value_offset, value->s); 4543 break; 4544 case T_INT: 4545 box->int_field_put(_value_offset, value->i); 4546 break; 4547 case T_LONG: 4548 box->long_field_put(_long_value_offset, value->j); 4549 break; 4550 default: 4551 return T_ILLEGAL; 4552 } // end switch 4553 return type; 4554 } 4555 4556 4557 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 4558 switch (type) { 4559 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 4560 case T_CHAR: st->print("%d", value->c); break; 4561 case T_BYTE: st->print("%d", value->b); break; 4562 case T_SHORT: st->print("%d", value->s); break; 4563 case T_INT: st->print("%d", value->i); break; 4564 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 4565 case T_FLOAT: st->print("%f", value->f); break; 4566 case T_DOUBLE: st->print("%lf", value->d); break; 4567 default: st->print("type %d?", type); break; 4568 } 4569 } 4570 4571 4572 // Support for java_lang_ref_SoftReference 4573 // 4574 4575 int java_lang_ref_SoftReference::_timestamp_offset; 4576 int java_lang_ref_SoftReference::_static_clock_offset; 4577 4578 #define SOFTREFERENCE_FIELDS_DO(macro) \ 4579 macro(_timestamp_offset, k, "timestamp", long_signature, false); \ 4580 macro(_static_clock_offset, k, "clock", long_signature, true) 4581 4582 void java_lang_ref_SoftReference::compute_offsets() { 4583 InstanceKlass* k = vmClasses::SoftReference_klass(); 4584 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4585 } 4586 4587 #if INCLUDE_CDS 4588 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) { 4589 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4590 } 4591 #endif 4592 4593 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 4594 return ref->long_field(_timestamp_offset); 4595 } 4596 4597 jlong java_lang_ref_SoftReference::clock() { 4598 InstanceKlass* ik = vmClasses::SoftReference_klass(); 4599 oop base = ik->static_field_base_raw(); 4600 return base->long_field(_static_clock_offset); 4601 } 4602 4603 void java_lang_ref_SoftReference::set_clock(jlong value) { 4604 InstanceKlass* ik = vmClasses::SoftReference_klass(); 4605 oop base = ik->static_field_base_raw(); 4606 base->long_field_put(_static_clock_offset, value); 4607 } 4608 4609 // Support for java_lang_invoke_DirectMethodHandle 4610 4611 int java_lang_invoke_DirectMethodHandle::_member_offset; 4612 4613 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 4614 oop member_name = nullptr; 4615 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 4616 "a DirectMethodHandle oop is expected"); 4617 return dmh->obj_field(_member_offset); 4618 } 4619 4620 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 4621 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 4622 4623 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 4624 InstanceKlass* k = vmClasses::DirectMethodHandle_klass(); 4625 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4626 } 4627 4628 #if INCLUDE_CDS 4629 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) { 4630 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4631 } 4632 #endif 4633 4634 // Support for java_lang_invoke_MethodHandle 4635 4636 int java_lang_invoke_MethodHandle::_type_offset; 4637 int java_lang_invoke_MethodHandle::_form_offset; 4638 4639 int java_lang_invoke_MemberName::_clazz_offset; 4640 int java_lang_invoke_MemberName::_name_offset; 4641 int java_lang_invoke_MemberName::_type_offset; 4642 int java_lang_invoke_MemberName::_flags_offset; 4643 int java_lang_invoke_MemberName::_method_offset; 4644 int java_lang_invoke_MemberName::_vmindex_offset; 4645 4646 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 4647 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 4648 4649 int java_lang_invoke_LambdaForm::_vmentry_offset; 4650 4651 #define METHODHANDLE_FIELDS_DO(macro) \ 4652 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 4653 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 4654 4655 void java_lang_invoke_MethodHandle::compute_offsets() { 4656 InstanceKlass* k = vmClasses::MethodHandle_klass(); 4657 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4658 } 4659 4660 #if INCLUDE_CDS 4661 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) { 4662 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4663 } 4664 #endif 4665 4666 #define MEMBERNAME_FIELDS_DO(macro) \ 4667 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 4668 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 4669 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 4670 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 4671 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 4672 4673 void java_lang_invoke_MemberName::compute_offsets() { 4674 InstanceKlass* k = vmClasses::MemberName_klass(); 4675 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4676 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4677 } 4678 4679 #if INCLUDE_CDS 4680 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) { 4681 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4682 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4683 } 4684 #endif 4685 4686 #define RESOLVEDMETHOD_FIELDS_DO(macro) \ 4687 macro(_vmholder_offset, k, "vmholder", class_signature, false) 4688 4689 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 4690 InstanceKlass* k = vmClasses::ResolvedMethodName_klass(); 4691 assert(k != nullptr, "jdk mismatch"); 4692 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4693 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4694 } 4695 4696 #if INCLUDE_CDS 4697 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) { 4698 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4699 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4700 } 4701 #endif 4702 4703 #define LAMBDAFORM_FIELDS_DO(macro) \ 4704 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 4705 4706 void java_lang_invoke_LambdaForm::compute_offsets() { 4707 InstanceKlass* k = vmClasses::LambdaForm_klass(); 4708 assert (k != nullptr, "jdk mismatch"); 4709 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4710 } 4711 4712 #if INCLUDE_CDS 4713 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) { 4714 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4715 } 4716 #endif 4717 4718 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 4719 return obj != nullptr && is_subclass(obj->klass()); 4720 } 4721 4722 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset; 4723 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset; 4724 4725 #define NEP_FIELDS_DO(macro) \ 4726 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \ 4727 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false); 4728 4729 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) { 4730 return obj != nullptr && is_subclass(obj->klass()); 4731 } 4732 4733 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() { 4734 InstanceKlass* k = vmClasses::NativeEntryPoint_klass(); 4735 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4736 } 4737 4738 #if INCLUDE_CDS 4739 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) { 4740 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4741 } 4742 #endif 4743 4744 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) { 4745 return entry->obj_field(_method_type_offset); 4746 } 4747 4748 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) { 4749 return entry->long_field(_downcall_stub_address_offset); 4750 } 4751 4752 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset; 4753 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset; 4754 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset; 4755 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset; 4756 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset; 4757 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset; 4758 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset; 4759 4760 #define ABIDescriptor_FIELDS_DO(macro) \ 4761 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4762 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4763 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4764 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \ 4765 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \ 4766 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \ 4767 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false); 4768 4769 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) { 4770 return obj != nullptr && is_subclass(obj->klass()); 4771 } 4772 4773 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() { 4774 InstanceKlass* k = vmClasses::ABIDescriptor_klass(); 4775 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4776 } 4777 4778 #if INCLUDE_CDS 4779 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) { 4780 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4781 } 4782 #endif 4783 4784 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) { 4785 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset)); 4786 } 4787 4788 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) { 4789 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset)); 4790 } 4791 4792 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) { 4793 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset)); 4794 } 4795 4796 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) { 4797 return entry->int_field(_stackAlignment_offset); 4798 } 4799 4800 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) { 4801 return entry->int_field(_shadowSpace_offset); 4802 } 4803 4804 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) { 4805 return entry->obj_field(_scratch1_offset); 4806 } 4807 4808 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) { 4809 return entry->obj_field(_scratch2_offset); 4810 } 4811 4812 int jdk_internal_foreign_abi_VMStorage::_type_offset; 4813 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset; 4814 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset; 4815 int jdk_internal_foreign_abi_VMStorage::_debugName_offset; 4816 4817 #define VMStorage_FIELDS_DO(macro) \ 4818 macro(_type_offset, k, "type", byte_signature, false); \ 4819 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \ 4820 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \ 4821 macro(_debugName_offset, k, "debugName", string_signature, false); \ 4822 4823 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) { 4824 return obj != nullptr && is_subclass(obj->klass()); 4825 } 4826 4827 void jdk_internal_foreign_abi_VMStorage::compute_offsets() { 4828 InstanceKlass* k = vmClasses::VMStorage_klass(); 4829 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4830 } 4831 4832 #if INCLUDE_CDS 4833 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) { 4834 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4835 } 4836 #endif 4837 4838 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) { 4839 return entry->byte_field(_type_offset); 4840 } 4841 4842 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) { 4843 return entry->int_field(_indexOrOffset_offset); 4844 } 4845 4846 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) { 4847 return entry->short_field(_segmentMaskOrSize_offset); 4848 } 4849 4850 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) { 4851 return entry->obj_field(_debugName_offset); 4852 } 4853 4854 int jdk_internal_foreign_abi_CallConv::_argRegs_offset; 4855 int jdk_internal_foreign_abi_CallConv::_retRegs_offset; 4856 4857 #define CallConv_FIELDS_DO(macro) \ 4858 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \ 4859 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \ 4860 4861 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) { 4862 return obj != nullptr && is_subclass(obj->klass()); 4863 } 4864 4865 void jdk_internal_foreign_abi_CallConv::compute_offsets() { 4866 InstanceKlass* k = vmClasses::CallConv_klass(); 4867 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4868 } 4869 4870 #if INCLUDE_CDS 4871 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) { 4872 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4873 } 4874 #endif 4875 4876 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) { 4877 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset)); 4878 } 4879 4880 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) { 4881 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset)); 4882 } 4883 4884 oop java_lang_invoke_MethodHandle::type(oop mh) { 4885 return mh->obj_field(_type_offset); 4886 } 4887 4888 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 4889 mh->obj_field_put(_type_offset, mtype); 4890 } 4891 4892 oop java_lang_invoke_MethodHandle::form(oop mh) { 4893 assert(_form_offset != 0, ""); 4894 return mh->obj_field(_form_offset); 4895 } 4896 4897 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 4898 assert(_form_offset != 0, ""); 4899 mh->obj_field_put(_form_offset, lform); 4900 } 4901 4902 /// MemberName accessors 4903 4904 oop java_lang_invoke_MemberName::clazz(oop mname) { 4905 assert(is_instance(mname), "wrong type"); 4906 return mname->obj_field(_clazz_offset); 4907 } 4908 4909 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 4910 assert(is_instance(mname), "wrong type"); 4911 mname->obj_field_put(_clazz_offset, clazz); 4912 } 4913 4914 oop java_lang_invoke_MemberName::name(oop mname) { 4915 assert(is_instance(mname), "wrong type"); 4916 return mname->obj_field(_name_offset); 4917 } 4918 4919 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 4920 assert(is_instance(mname), "wrong type"); 4921 mname->obj_field_put(_name_offset, name); 4922 } 4923 4924 oop java_lang_invoke_MemberName::type(oop mname) { 4925 assert(is_instance(mname), "wrong type"); 4926 return mname->obj_field(_type_offset); 4927 } 4928 4929 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 4930 assert(is_instance(mname), "wrong type"); 4931 mname->obj_field_put(_type_offset, type); 4932 } 4933 4934 int java_lang_invoke_MemberName::flags(oop mname) { 4935 assert(is_instance(mname), "wrong type"); 4936 return mname->int_field(_flags_offset); 4937 } 4938 4939 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 4940 assert(is_instance(mname), "wrong type"); 4941 mname->int_field_put(_flags_offset, flags); 4942 } 4943 4944 4945 // Return vmtarget from ResolvedMethodName method field through indirection 4946 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 4947 assert(is_instance(mname), "wrong type"); 4948 oop method = mname->obj_field(_method_offset); 4949 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method); 4950 } 4951 4952 bool java_lang_invoke_MemberName::is_method(oop mname) { 4953 assert(is_instance(mname), "must be MemberName"); 4954 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 4955 } 4956 4957 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 4958 assert(is_instance(mname), "wrong type"); 4959 mname->obj_field_put(_method_offset, resolved_method); 4960 } 4961 4962 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 4963 assert(is_instance(mname), "wrong type"); 4964 return (intptr_t) mname->address_field(_vmindex_offset); 4965 } 4966 4967 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 4968 assert(is_instance(mname), "wrong type"); 4969 mname->address_field_put(_vmindex_offset, (address) index); 4970 } 4971 4972 4973 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 4974 assert(is_instance(resolved_method), "wrong type"); 4975 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 4976 assert(m->is_method(), "must be"); 4977 return m; 4978 } 4979 4980 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 4981 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 4982 assert(is_instance(resolved_method), "wrong type"); 4983 resolved_method->address_field_put(_vmtarget_offset, (address)m); 4984 } 4985 4986 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) { 4987 assert(is_instance(resolved_method), "wrong type"); 4988 resolved_method->obj_field_put(_vmholder_offset, holder); 4989 } 4990 4991 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 4992 const Method* method = m(); 4993 4994 // lookup ResolvedMethod oop in the table, or create a new one and intern it 4995 oop resolved_method = ResolvedMethodTable::find_method(method); 4996 if (resolved_method != nullptr) { 4997 return resolved_method; 4998 } 4999 5000 InstanceKlass* k = vmClasses::ResolvedMethodName_klass(); 5001 if (!k->is_initialized()) { 5002 k->initialize(CHECK_NULL); 5003 } 5004 5005 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 5006 5007 NoSafepointVerifier nsv; 5008 5009 if (method->is_old()) { 5010 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() : 5011 method->get_new_method(); 5012 } 5013 5014 InstanceKlass* holder = method->method_holder(); 5015 5016 set_vmtarget(new_resolved_method, const_cast<Method*>(method)); 5017 // Add a reference to the loader (actually mirror because hidden classes may not have 5018 // distinct loaders) to ensure the metadata is kept alive. 5019 // This mirror may be different than the one in clazz field. 5020 set_vmholder(new_resolved_method, holder->java_mirror()); 5021 5022 // Set flag in class to indicate this InstanceKlass has entries in the table 5023 // to avoid walking table during redefinition if none of the redefined classes 5024 // have any membernames in the table. 5025 holder->set_has_resolved_methods(); 5026 5027 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method)); 5028 } 5029 5030 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 5031 assert(is_instance(lform), "wrong type"); 5032 return lform->obj_field(_vmentry_offset); 5033 } 5034 5035 5036 // Support for java_lang_invoke_MethodType 5037 5038 int java_lang_invoke_MethodType::_rtype_offset; 5039 int java_lang_invoke_MethodType::_ptypes_offset; 5040 5041 #define METHODTYPE_FIELDS_DO(macro) \ 5042 macro(_rtype_offset, k, "rtype", class_signature, false); \ 5043 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 5044 5045 void java_lang_invoke_MethodType::compute_offsets() { 5046 InstanceKlass* k = vmClasses::MethodType_klass(); 5047 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5048 } 5049 5050 #if INCLUDE_CDS 5051 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) { 5052 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5053 } 5054 #endif 5055 5056 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 5057 st->print("("); 5058 objArrayOop pts = ptypes(mt); 5059 if (pts != nullptr) { 5060 for (int i = 0, limit = pts->length(); i < limit; i++) { 5061 java_lang_Class::print_signature(pts->obj_at(i), st); 5062 } 5063 } else { 5064 st->print("null"); 5065 } 5066 st->print(")"); 5067 oop rt = rtype(mt); 5068 if (rt != nullptr) { 5069 java_lang_Class::print_signature(rt, st); 5070 } else { 5071 st->print("null"); 5072 } 5073 } 5074 5075 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) { 5076 ResourceMark rm; 5077 stringStream buffer(128); 5078 print_signature(mt, &buffer); 5079 const char* sigstr = buffer.base(); 5080 int siglen = (int) buffer.size(); 5081 Symbol *name; 5082 if (!intern_if_not_found) { 5083 name = SymbolTable::probe(sigstr, siglen); 5084 } else { 5085 name = SymbolTable::new_symbol(sigstr, siglen); 5086 } 5087 return name; 5088 } 5089 5090 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 5091 if (mt1 == mt2) 5092 return true; 5093 if (rtype(mt1) != rtype(mt2)) 5094 return false; 5095 if (ptype_count(mt1) != ptype_count(mt2)) 5096 return false; 5097 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 5098 if (ptype(mt1, i) != ptype(mt2, i)) 5099 return false; 5100 } 5101 return true; 5102 } 5103 5104 oop java_lang_invoke_MethodType::rtype(oop mt) { 5105 assert(is_instance(mt), "must be a MethodType"); 5106 return mt->obj_field(_rtype_offset); 5107 } 5108 5109 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 5110 assert(is_instance(mt), "must be a MethodType"); 5111 return (objArrayOop) mt->obj_field(_ptypes_offset); 5112 } 5113 5114 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 5115 return ptypes(mt)->obj_at(idx); 5116 } 5117 5118 int java_lang_invoke_MethodType::ptype_count(oop mt) { 5119 return ptypes(mt)->length(); 5120 } 5121 5122 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 5123 objArrayOop pts = ptypes(mt); 5124 int count = pts->length(); 5125 int slots = 0; 5126 for (int i = 0; i < count; i++) { 5127 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 5128 slots += type2size[bt]; 5129 } 5130 return slots; 5131 } 5132 5133 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 5134 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 5135 return type2size[bt]; 5136 } 5137 5138 5139 // Support for java_lang_invoke_CallSite 5140 5141 int java_lang_invoke_CallSite::_target_offset; 5142 int java_lang_invoke_CallSite::_vmdependencies_offset; 5143 int java_lang_invoke_CallSite::_last_cleanup_offset; 5144 5145 #define CALLSITE_FIELDS_DO(macro) \ 5146 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 5147 5148 void java_lang_invoke_CallSite::compute_offsets() { 5149 InstanceKlass* k = vmClasses::CallSite_klass(); 5150 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5151 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 5152 } 5153 5154 #if INCLUDE_CDS 5155 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) { 5156 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5157 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 5158 } 5159 #endif 5160 5161 DependencyContext java_lang_invoke_CallSite::vmdependencies(oop call_site) { 5162 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 5163 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset); 5164 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset); 5165 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr); 5166 return dep_ctx; 5167 } 5168 5169 // Support for java_lang_invoke_ConstantCallSite 5170 5171 int java_lang_invoke_ConstantCallSite::_is_frozen_offset; 5172 5173 #define CONSTANTCALLSITE_FIELDS_DO(macro) \ 5174 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false) 5175 5176 void java_lang_invoke_ConstantCallSite::compute_offsets() { 5177 InstanceKlass* k = vmClasses::ConstantCallSite_klass(); 5178 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5179 } 5180 5181 #if INCLUDE_CDS 5182 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) { 5183 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5184 } 5185 #endif 5186 5187 // Support for java_lang_ClassLoader 5188 5189 int java_lang_ClassLoader::_loader_data_offset; 5190 int java_lang_ClassLoader::_parallelCapable_offset; 5191 int java_lang_ClassLoader::_name_offset; 5192 int java_lang_ClassLoader::_nameAndId_offset; 5193 int java_lang_ClassLoader::_unnamedModule_offset; 5194 int java_lang_ClassLoader::_parent_offset; 5195 5196 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) { 5197 assert(loader != nullptr, "loader must not be null"); 5198 assert(oopDesc::is_oop(loader), "loader must be oop"); 5199 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset)); 5200 } 5201 5202 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 5203 assert(loader != nullptr, "loader must not be null"); 5204 assert(oopDesc::is_oop(loader), "loader must be oop"); 5205 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset); 5206 } 5207 5208 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) { 5209 assert(loader != nullptr, "loader must not be null"); 5210 assert(oopDesc::is_oop(loader), "loader must be oop"); 5211 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data); 5212 } 5213 5214 #define CLASSLOADER_FIELDS_DO(macro) \ 5215 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 5216 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 5217 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \ 5218 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 5219 macro(_parent_offset, k1, "parent", classloader_signature, false) 5220 5221 void java_lang_ClassLoader::compute_offsets() { 5222 InstanceKlass* k1 = vmClasses::ClassLoader_klass(); 5223 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5224 5225 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 5226 } 5227 5228 #if INCLUDE_CDS 5229 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) { 5230 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5231 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 5232 } 5233 #endif 5234 5235 oop java_lang_ClassLoader::parent(oop loader) { 5236 assert(is_instance(loader), "loader must be oop"); 5237 return loader->obj_field(_parent_offset); 5238 } 5239 5240 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) { 5241 assert(is_instance(loader), "loader must be oop"); 5242 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset); 5243 } 5244 5245 // Returns the name field of this class loader. If the name field has not 5246 // been set, null will be returned. 5247 oop java_lang_ClassLoader::name(oop loader) { 5248 assert(is_instance(loader), "loader must be oop"); 5249 return loader->obj_field(_name_offset); 5250 } 5251 5252 // Returns the nameAndId field of this class loader. The format is 5253 // as follows: 5254 // If the defining loader has a name explicitly set then '<loader-name>' @<id> 5255 // If the defining loader has no name then <qualified-class-name> @<id> 5256 // If built-in loader, then omit '@<id>' as there is only one instance. 5257 // Use ClassLoader::loader_name_id() to obtain this String as a char*. 5258 oop java_lang_ClassLoader::nameAndId(oop loader) { 5259 assert(is_instance(loader), "loader must be oop"); 5260 return loader->obj_field(_nameAndId_offset); 5261 } 5262 5263 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 5264 assert(is_instance(loader), "loader must be oop"); 5265 assert(cl == nullptr || is_instance(cl), "cl argument must be oop"); 5266 oop acl = loader; 5267 DEBUG_ONLY(jint loop_count = 0); 5268 // This loop taken verbatim from ClassLoader.java: 5269 do { 5270 acl = parent(acl); 5271 if (cl == acl) { 5272 return true; 5273 } 5274 assert(++loop_count > 0, "loop_count overflow"); 5275 } while (acl != nullptr); 5276 return false; 5277 } 5278 5279 bool java_lang_ClassLoader::is_instance(oop obj) { 5280 return obj != nullptr && is_subclass(obj->klass()); 5281 } 5282 5283 5284 // For class loader classes, parallelCapable defined 5285 // based on non-null field 5286 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 5287 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 5288 assert(_parallelCapable_offset != 0, "offsets should have been initialized"); 5289 return (class_loader->obj_field(_parallelCapable_offset) != nullptr); 5290 } 5291 5292 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 5293 oop cl = SystemDictionary::java_system_loader(); 5294 while(cl != nullptr) { 5295 if (cl == loader) return true; 5296 cl = parent(cl); 5297 } 5298 return false; 5299 } 5300 5301 oop java_lang_ClassLoader::unnamedModule(oop loader) { 5302 assert(is_instance(loader), "loader must be oop"); 5303 return loader->obj_field(_unnamedModule_offset); 5304 } 5305 5306 // Support for java_lang_System 5307 // 5308 5309 int java_lang_System::_static_in_offset; 5310 int java_lang_System::_static_out_offset; 5311 int java_lang_System::_static_err_offset; 5312 5313 #define SYSTEM_FIELDS_DO(macro) \ 5314 macro(_static_in_offset, k, "in", input_stream_signature, true); \ 5315 macro(_static_out_offset, k, "out", print_stream_signature, true); \ 5316 macro(_static_err_offset, k, "err", print_stream_signature, true); 5317 5318 void java_lang_System::compute_offsets() { 5319 InstanceKlass* k = vmClasses::System_klass(); 5320 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5321 } 5322 5323 #if INCLUDE_CDS 5324 void java_lang_System::serialize_offsets(SerializeClosure* f) { 5325 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5326 } 5327 #endif 5328 5329 // Support for jdk_internal_misc_UnsafeConstants 5330 // 5331 class UnsafeConstantsFixup : public FieldClosure { 5332 private: 5333 int _address_size; 5334 int _page_size; 5335 bool _big_endian; 5336 bool _use_unaligned_access; 5337 int _data_cache_line_flush_size; 5338 public: 5339 UnsafeConstantsFixup() { 5340 // round up values for all static final fields 5341 _address_size = sizeof(void*); 5342 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size()); 5343 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true); 5344 _use_unaligned_access = UseUnalignedAccesses; 5345 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size(); 5346 } 5347 5348 void do_field(fieldDescriptor* fd) { 5349 oop mirror = fd->field_holder()->java_mirror(); 5350 assert(mirror != nullptr, "UnsafeConstants must have mirror already"); 5351 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants"); 5352 assert(fd->is_final(), "fields of UnsafeConstants must be final"); 5353 assert(fd->is_static(), "fields of UnsafeConstants must be static"); 5354 if (fd->name() == vmSymbols::address_size_name()) { 5355 mirror->int_field_put(fd->offset(), _address_size); 5356 } else if (fd->name() == vmSymbols::page_size_name()) { 5357 mirror->int_field_put(fd->offset(), _page_size); 5358 } else if (fd->name() == vmSymbols::big_endian_name()) { 5359 mirror->bool_field_put(fd->offset(), _big_endian); 5360 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) { 5361 mirror->bool_field_put(fd->offset(), _use_unaligned_access); 5362 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) { 5363 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size); 5364 } else { 5365 assert(false, "unexpected UnsafeConstants field"); 5366 } 5367 } 5368 }; 5369 5370 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() { 5371 UnsafeConstantsFixup fixup; 5372 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup); 5373 } 5374 5375 5376 // java_lang_StackTraceElement 5377 5378 int java_lang_StackTraceElement::_methodName_offset; 5379 int java_lang_StackTraceElement::_fileName_offset; 5380 int java_lang_StackTraceElement::_lineNumber_offset; 5381 int java_lang_StackTraceElement::_moduleName_offset; 5382 int java_lang_StackTraceElement::_moduleVersion_offset; 5383 int java_lang_StackTraceElement::_classLoaderName_offset; 5384 int java_lang_StackTraceElement::_declaringClass_offset; 5385 int java_lang_StackTraceElement::_declaringClassObject_offset; 5386 5387 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 5388 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 5389 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 5390 macro(_moduleName_offset, k, "moduleName", string_signature, false); \ 5391 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 5392 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \ 5393 macro(_methodName_offset, k, "methodName", string_signature, false); \ 5394 macro(_fileName_offset, k, "fileName", string_signature, false); \ 5395 macro(_lineNumber_offset, k, "lineNumber", int_signature, false) 5396 5397 // Support for java_lang_StackTraceElement 5398 void java_lang_StackTraceElement::compute_offsets() { 5399 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 5400 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5401 } 5402 5403 #if INCLUDE_CDS 5404 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) { 5405 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5406 } 5407 #endif 5408 5409 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 5410 element->obj_field_put(_fileName_offset, value); 5411 } 5412 5413 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 5414 element->obj_field_put(_declaringClass_offset, value); 5415 } 5416 5417 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 5418 element->obj_field_put(_methodName_offset, value); 5419 } 5420 5421 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 5422 element->int_field_put(_lineNumber_offset, value); 5423 } 5424 5425 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 5426 element->obj_field_put(_moduleName_offset, value); 5427 } 5428 5429 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 5430 element->obj_field_put(_moduleVersion_offset, value); 5431 } 5432 5433 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 5434 element->obj_field_put(_classLoaderName_offset, value); 5435 } 5436 5437 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 5438 element->obj_field_put(_declaringClassObject_offset, value); 5439 } 5440 5441 5442 // java_lang_AssertionStatusDirectives 5443 5444 int java_lang_AssertionStatusDirectives::_classes_offset; 5445 int java_lang_AssertionStatusDirectives::_classEnabled_offset; 5446 int java_lang_AssertionStatusDirectives::_packages_offset; 5447 int java_lang_AssertionStatusDirectives::_packageEnabled_offset; 5448 int java_lang_AssertionStatusDirectives::_deflt_offset; 5449 5450 // Support for java Assertions - java_lang_AssertionStatusDirectives. 5451 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 5452 macro(_classes_offset, k, "classes", string_array_signature, false); \ 5453 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 5454 macro(_packages_offset, k, "packages", string_array_signature, false); \ 5455 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 5456 macro(_deflt_offset, k, "deflt", bool_signature, false) 5457 5458 void java_lang_AssertionStatusDirectives::compute_offsets() { 5459 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass(); 5460 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5461 } 5462 5463 #if INCLUDE_CDS 5464 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) { 5465 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5466 } 5467 #endif 5468 5469 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 5470 o->obj_field_put(_classes_offset, val); 5471 } 5472 5473 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 5474 o->obj_field_put(_classEnabled_offset, val); 5475 } 5476 5477 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 5478 o->obj_field_put(_packages_offset, val); 5479 } 5480 5481 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 5482 o->obj_field_put(_packageEnabled_offset, val); 5483 } 5484 5485 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 5486 o->bool_field_put(_deflt_offset, val); 5487 } 5488 5489 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset; 5490 5491 #define AOS_FIELDS_DO(macro) \ 5492 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false) 5493 5494 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() { 5495 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass(); 5496 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5497 } 5498 5499 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 5500 assert(_owner_offset != 0, "Must be initialized"); 5501 return obj->obj_field_acquire(_owner_offset); 5502 } 5503 5504 #if INCLUDE_CDS 5505 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) { 5506 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5507 } 5508 #endif 5509 5510 int vector_VectorPayload::_payload_offset; 5511 5512 #define VECTORPAYLOAD_FIELDS_DO(macro) \ 5513 macro(_payload_offset, k, "payload", object_signature, false) 5514 5515 void vector_VectorPayload::compute_offsets() { 5516 InstanceKlass* k = vmClasses::vector_VectorPayload_klass(); 5517 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5518 } 5519 5520 #if INCLUDE_CDS 5521 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) { 5522 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5523 } 5524 #endif 5525 5526 void vector_VectorPayload::set_payload(oop o, oop val) { 5527 o->obj_field_put(_payload_offset, val); 5528 } 5529 5530 bool vector_VectorPayload::is_instance(oop obj) { 5531 return obj != nullptr && is_subclass(obj->klass()); 5532 } 5533 5534 int java_lang_Integer_IntegerCache::_static_cache_offset; 5535 int java_lang_Long_LongCache::_static_cache_offset; 5536 int java_lang_Character_CharacterCache::_static_cache_offset; 5537 int java_lang_Short_ShortCache::_static_cache_offset; 5538 int java_lang_Byte_ByteCache::_static_cache_offset; 5539 5540 #define INTEGER_CACHE_FIELDS_DO(macro) \ 5541 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true) 5542 5543 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) { 5544 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5545 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5546 } 5547 5548 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) { 5549 oop base = ik->static_field_base_raw(); 5550 return objArrayOop(base->obj_field(_static_cache_offset)); 5551 } 5552 5553 Symbol* java_lang_Integer_IntegerCache::symbol() { 5554 return vmSymbols::java_lang_Integer_IntegerCache(); 5555 } 5556 5557 #if INCLUDE_CDS 5558 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) { 5559 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5560 } 5561 #endif 5562 #undef INTEGER_CACHE_FIELDS_DO 5563 5564 jint java_lang_Integer::value(oop obj) { 5565 jvalue v; 5566 java_lang_boxing_object::get_value(obj, &v); 5567 return v.i; 5568 } 5569 5570 #define LONG_CACHE_FIELDS_DO(macro) \ 5571 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true) 5572 5573 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) { 5574 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5575 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5576 } 5577 5578 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) { 5579 oop base = ik->static_field_base_raw(); 5580 return objArrayOop(base->obj_field(_static_cache_offset)); 5581 } 5582 5583 Symbol* java_lang_Long_LongCache::symbol() { 5584 return vmSymbols::java_lang_Long_LongCache(); 5585 } 5586 5587 #if INCLUDE_CDS 5588 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) { 5589 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5590 } 5591 #endif 5592 #undef LONG_CACHE_FIELDS_DO 5593 5594 jlong java_lang_Long::value(oop obj) { 5595 jvalue v; 5596 java_lang_boxing_object::get_value(obj, &v); 5597 return v.j; 5598 } 5599 5600 #define CHARACTER_CACHE_FIELDS_DO(macro) \ 5601 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true) 5602 5603 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) { 5604 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5605 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5606 } 5607 5608 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) { 5609 oop base = ik->static_field_base_raw(); 5610 return objArrayOop(base->obj_field(_static_cache_offset)); 5611 } 5612 5613 Symbol* java_lang_Character_CharacterCache::symbol() { 5614 return vmSymbols::java_lang_Character_CharacterCache(); 5615 } 5616 5617 #if INCLUDE_CDS 5618 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) { 5619 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5620 } 5621 #endif 5622 #undef CHARACTER_CACHE_FIELDS_DO 5623 5624 jchar java_lang_Character::value(oop obj) { 5625 jvalue v; 5626 java_lang_boxing_object::get_value(obj, &v); 5627 return v.c; 5628 } 5629 5630 #define SHORT_CACHE_FIELDS_DO(macro) \ 5631 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true) 5632 5633 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) { 5634 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5635 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5636 } 5637 5638 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) { 5639 oop base = ik->static_field_base_raw(); 5640 return objArrayOop(base->obj_field(_static_cache_offset)); 5641 } 5642 5643 Symbol* java_lang_Short_ShortCache::symbol() { 5644 return vmSymbols::java_lang_Short_ShortCache(); 5645 } 5646 5647 #if INCLUDE_CDS 5648 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) { 5649 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5650 } 5651 #endif 5652 #undef SHORT_CACHE_FIELDS_DO 5653 5654 jshort java_lang_Short::value(oop obj) { 5655 jvalue v; 5656 java_lang_boxing_object::get_value(obj, &v); 5657 return v.s; 5658 } 5659 5660 #define BYTE_CACHE_FIELDS_DO(macro) \ 5661 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true) 5662 5663 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) { 5664 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5665 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5666 } 5667 5668 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) { 5669 oop base = ik->static_field_base_raw(); 5670 return objArrayOop(base->obj_field(_static_cache_offset)); 5671 } 5672 5673 Symbol* java_lang_Byte_ByteCache::symbol() { 5674 return vmSymbols::java_lang_Byte_ByteCache(); 5675 } 5676 5677 #if INCLUDE_CDS 5678 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) { 5679 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5680 } 5681 #endif 5682 #undef BYTE_CACHE_FIELDS_DO 5683 5684 jbyte java_lang_Byte::value(oop obj) { 5685 jvalue v; 5686 java_lang_boxing_object::get_value(obj, &v); 5687 return v.b; 5688 } 5689 5690 int java_lang_Boolean::_static_TRUE_offset; 5691 int java_lang_Boolean::_static_FALSE_offset; 5692 5693 #define BOOLEAN_FIELDS_DO(macro) \ 5694 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \ 5695 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true) 5696 5697 5698 void java_lang_Boolean::compute_offsets(InstanceKlass *k) { 5699 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5700 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5701 } 5702 5703 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) { 5704 oop base = ik->static_field_base_raw(); 5705 return base->obj_field(_static_TRUE_offset); 5706 } 5707 5708 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) { 5709 oop base = ik->static_field_base_raw(); 5710 return base->obj_field(_static_FALSE_offset); 5711 } 5712 5713 Symbol* java_lang_Boolean::symbol() { 5714 return vmSymbols::java_lang_Boolean(); 5715 } 5716 5717 #if INCLUDE_CDS 5718 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) { 5719 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5720 } 5721 #endif 5722 #undef BOOLEAN_CACHE_FIELDS_DO 5723 5724 jboolean java_lang_Boolean::value(oop obj) { 5725 jvalue v; 5726 java_lang_boxing_object::get_value(obj, &v); 5727 return v.z; 5728 } 5729 5730 // java_lang_reflect_RecordComponent 5731 5732 int java_lang_reflect_RecordComponent::_clazz_offset; 5733 int java_lang_reflect_RecordComponent::_name_offset; 5734 int java_lang_reflect_RecordComponent::_type_offset; 5735 int java_lang_reflect_RecordComponent::_accessor_offset; 5736 int java_lang_reflect_RecordComponent::_signature_offset; 5737 int java_lang_reflect_RecordComponent::_annotations_offset; 5738 int java_lang_reflect_RecordComponent::_typeAnnotations_offset; 5739 5740 #define RECORDCOMPONENT_FIELDS_DO(macro) \ 5741 macro(_clazz_offset, k, "clazz", class_signature, false); \ 5742 macro(_name_offset, k, "name", string_signature, false); \ 5743 macro(_type_offset, k, "type", class_signature, false); \ 5744 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \ 5745 macro(_signature_offset, k, "signature", string_signature, false); \ 5746 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \ 5747 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false); 5748 5749 // Support for java_lang_reflect_RecordComponent 5750 void java_lang_reflect_RecordComponent::compute_offsets() { 5751 InstanceKlass* k = vmClasses::RecordComponent_klass(); 5752 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5753 } 5754 5755 #if INCLUDE_CDS 5756 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) { 5757 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5758 } 5759 #endif 5760 5761 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) { 5762 element->obj_field_put(_clazz_offset, value); 5763 } 5764 5765 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) { 5766 element->obj_field_put(_name_offset, value); 5767 } 5768 5769 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) { 5770 element->obj_field_put(_type_offset, value); 5771 } 5772 5773 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) { 5774 element->obj_field_put(_accessor_offset, value); 5775 } 5776 5777 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) { 5778 element->obj_field_put(_signature_offset, value); 5779 } 5780 5781 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) { 5782 element->obj_field_put(_annotations_offset, value); 5783 } 5784 5785 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) { 5786 element->obj_field_put(_typeAnnotations_offset, value); 5787 } 5788 5789 // java_lang_InternalError 5790 int java_lang_InternalError::_during_unsafe_access_offset; 5791 5792 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) { 5793 internal_error->bool_field_put(_during_unsafe_access_offset, true); 5794 } 5795 5796 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) { 5797 return internal_error->bool_field(_during_unsafe_access_offset); 5798 } 5799 5800 void java_lang_InternalError::compute_offsets() { 5801 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 5802 } 5803 5804 #if INCLUDE_CDS 5805 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) { 5806 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 5807 } 5808 #endif 5809 5810 #define BASIC_JAVA_CLASSES_DO_PART1(f) \ 5811 f(java_lang_Class) \ 5812 f(java_lang_String) \ 5813 f(java_lang_ref_Reference) \ 5814 //end 5815 5816 #define BASIC_JAVA_CLASSES_DO_PART2(f) \ 5817 f(java_lang_System) \ 5818 f(java_lang_ClassLoader) \ 5819 f(java_lang_Throwable) \ 5820 f(java_lang_Thread) \ 5821 f(java_lang_Thread_FieldHolder) \ 5822 f(java_lang_Thread_Constants) \ 5823 f(java_lang_ThreadGroup) \ 5824 f(java_lang_VirtualThread) \ 5825 f(java_lang_InternalError) \ 5826 f(java_lang_AssertionStatusDirectives) \ 5827 f(java_lang_ref_SoftReference) \ 5828 f(java_lang_invoke_MethodHandle) \ 5829 f(java_lang_invoke_DirectMethodHandle) \ 5830 f(java_lang_invoke_MemberName) \ 5831 f(java_lang_invoke_ResolvedMethodName) \ 5832 f(java_lang_invoke_LambdaForm) \ 5833 f(java_lang_invoke_MethodType) \ 5834 f(java_lang_invoke_CallSite) \ 5835 f(java_lang_invoke_ConstantCallSite) \ 5836 f(java_lang_reflect_AccessibleObject) \ 5837 f(java_lang_reflect_Method) \ 5838 f(java_lang_reflect_Constructor) \ 5839 f(java_lang_reflect_Field) \ 5840 f(java_lang_reflect_RecordComponent) \ 5841 f(reflect_ConstantPool) \ 5842 f(java_lang_reflect_Parameter) \ 5843 f(java_lang_Module) \ 5844 f(java_lang_StackTraceElement) \ 5845 f(java_lang_ClassFrameInfo) \ 5846 f(java_lang_StackFrameInfo) \ 5847 f(java_lang_LiveStackFrameInfo) \ 5848 f(jdk_internal_vm_ContinuationScope) \ 5849 f(jdk_internal_vm_Continuation) \ 5850 f(jdk_internal_vm_StackChunk) \ 5851 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \ 5852 f(jdk_internal_foreign_abi_NativeEntryPoint) \ 5853 f(jdk_internal_foreign_abi_ABIDescriptor) \ 5854 f(jdk_internal_foreign_abi_VMStorage) \ 5855 f(jdk_internal_foreign_abi_CallConv) \ 5856 f(jdk_internal_misc_UnsafeConstants) \ 5857 f(java_lang_boxing_object) \ 5858 f(vector_VectorPayload) \ 5859 //end 5860 5861 #define BASIC_JAVA_CLASSES_DO(f) \ 5862 BASIC_JAVA_CLASSES_DO_PART1(f) \ 5863 BASIC_JAVA_CLASSES_DO_PART2(f) 5864 5865 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets(); 5866 5867 // Compute field offsets of all the classes in this file 5868 void JavaClasses::compute_offsets() { 5869 if (CDSConfig::is_using_archive()) { 5870 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() && 5871 JvmtiExport::has_early_class_hook_env()), 5872 "JavaClasses::compute_offsets() must be called in early JVMTI phase.")); 5873 // None of the classes used by the rest of this function can be replaced by 5874 // JVMTI ClassFileLoadHook. 5875 // We are safe to use the archived offsets, which have already been restored 5876 // by JavaClasses::serialize_offsets, without computing the offsets again. 5877 return; 5878 } 5879 5880 // We have already called the compute_offsets() of the 5881 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and 5882 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all() 5883 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS); 5884 } 5885 5886 #if INCLUDE_CDS 5887 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc); 5888 5889 void JavaClasses::serialize_offsets(SerializeClosure* soc) { 5890 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS); 5891 } 5892 #endif 5893 5894 #if INCLUDE_CDS_JAVA_HEAP 5895 bool JavaClasses::is_supported_for_archiving(oop obj) { 5896 Klass* klass = obj->klass(); 5897 5898 if (!CDSConfig::is_dumping_method_handles()) { 5899 // These are supported by CDS only when CDSConfig::is_dumping_method_handles() is enabled. 5900 if (klass == vmClasses::ResolvedMethodName_klass() || 5901 klass == vmClasses::MemberName_klass()) { 5902 return false; 5903 } 5904 } 5905 5906 if (!AOTReferenceObjSupport::is_enabled() && klass->is_subclass_of(vmClasses::Reference_klass())) { 5907 return false; 5908 } 5909 5910 return true; 5911 } 5912 #endif 5913 5914 #ifndef PRODUCT 5915 5916 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check. 5917 5918 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name, 5919 const char* field_sig) { 5920 EXCEPTION_MARK; 5921 fieldDescriptor fd; 5922 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name); 5923 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 5924 InstanceKlass* ik = InstanceKlass::cast(k); 5925 TempNewSymbol f_name = SymbolTable::new_symbol(field_name); 5926 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig); 5927 if (!ik->find_local_field(f_name, f_sig, &fd)) { 5928 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 5929 return false; 5930 } 5931 if (fd.is_static()) { 5932 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 5933 return false; 5934 } 5935 if (fd.offset() == deserialized_offset ) { 5936 return true; 5937 } else { 5938 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.", 5939 klass_name, field_name, deserialized_offset, fd.offset()); 5940 return false; 5941 } 5942 } 5943 5944 void JavaClasses::check_offsets() { 5945 bool valid = true; 5946 5947 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 5948 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig) 5949 5950 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 5951 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig) 5952 5953 // Boxed primitive objects (java_lang_boxing_object) 5954 5955 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 5956 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 5957 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 5958 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 5959 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 5960 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 5961 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 5962 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 5963 5964 if (!valid) vm_exit_during_initialization("Field offset verification failed"); 5965 } 5966 5967 #endif // PRODUCT 5968 5969 int InjectedField::compute_offset() { 5970 InstanceKlass* ik = InstanceKlass::cast(klass()); 5971 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 5972 if (!may_be_java && !fs.field_flags().is_injected()) { 5973 // Only look at injected fields 5974 continue; 5975 } 5976 if (fs.name() == name() && fs.signature() == signature()) { 5977 return fs.offset(); 5978 } 5979 } 5980 ResourceMark rm; 5981 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)" : ""); 5982 #ifndef PRODUCT 5983 ik->print(); 5984 tty->print_cr("all fields:"); 5985 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 5986 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_field_flags()); 5987 } 5988 #endif //PRODUCT 5989 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 5990 return -1; 5991 } 5992 5993 void javaClasses_init() { 5994 JavaClasses::compute_offsets(); 5995 JavaClasses::check_offsets(); 5996 FilteredFieldsMap::initialize(); // must be done after computing offsets. 5997 }