1 /* 2 * Copyright (c) 1997, 2024, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "cds/archiveBuilder.hpp" 27 #include "cds/archiveHeapLoader.hpp" 28 #include "cds/cdsConfig.hpp" 29 #include "cds/heapShared.hpp" 30 #include "cds/metaspaceShared.hpp" 31 #include "classfile/altHashing.hpp" 32 #include "classfile/classLoaderData.inline.hpp" 33 #include "classfile/javaClasses.inline.hpp" 34 #include "classfile/javaClassesImpl.hpp" 35 #include "classfile/javaThreadStatus.hpp" 36 #include "classfile/moduleEntry.hpp" 37 #include "classfile/stringTable.hpp" 38 #include "classfile/symbolTable.hpp" 39 #include "classfile/systemDictionary.hpp" 40 #include "classfile/vmClasses.hpp" 41 #include "classfile/vmSymbols.hpp" 42 #include "code/debugInfo.hpp" 43 #include "code/dependencyContext.hpp" 44 #include "code/pcDesc.hpp" 45 #include "gc/shared/collectedHeap.inline.hpp" 46 #include "interpreter/interpreter.hpp" 47 #include "interpreter/linkResolver.hpp" 48 #include "jvm.h" 49 #include "logging/log.hpp" 50 #include "logging/logStream.hpp" 51 #include "memory/oopFactory.hpp" 52 #include "memory/resourceArea.hpp" 53 #include "memory/universe.hpp" 54 #include "oops/fieldInfo.hpp" 55 #include "oops/fieldStreams.inline.hpp" 56 #include "oops/flatArrayKlass.hpp" 57 #include "oops/inlineKlass.inline.hpp" 58 #include "oops/instanceKlass.inline.hpp" 59 #include "oops/instanceMirrorKlass.inline.hpp" 60 #include "oops/klass.hpp" 61 #include "oops/klass.inline.hpp" 62 #include "oops/method.inline.hpp" 63 #include "oops/objArrayKlass.hpp" 64 #include "oops/objArrayOop.inline.hpp" 65 #include "oops/oopCast.inline.hpp" 66 #include "oops/oop.inline.hpp" 67 #include "oops/symbol.hpp" 68 #include "oops/recordComponent.hpp" 69 #include "oops/typeArrayOop.inline.hpp" 70 #include "prims/jvmtiExport.hpp" 71 #include "prims/methodHandles.hpp" 72 #include "prims/resolvedMethodTable.hpp" 73 #include "runtime/continuationEntry.inline.hpp" 74 #include "runtime/continuationJavaClasses.inline.hpp" 75 #include "runtime/fieldDescriptor.inline.hpp" 76 #include "runtime/frame.inline.hpp" 77 #include "runtime/handles.inline.hpp" 78 #include "runtime/handshake.hpp" 79 #include "runtime/init.hpp" 80 #include "runtime/interfaceSupport.inline.hpp" 81 #include "runtime/java.hpp" 82 #include "runtime/javaCalls.hpp" 83 #include "runtime/javaThread.hpp" 84 #include "runtime/jniHandles.inline.hpp" 85 #include "runtime/reflectionUtils.hpp" 86 #include "runtime/safepoint.hpp" 87 #include "runtime/safepointVerifiers.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), 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(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 { 395 ResourceMark rm; 396 const char* expected = symbol->as_utf8(); 397 char* actual = as_utf8_string(h_obj()); 398 if (strncmp(expected, actual, utf8_len) != 0) { 399 fatal("Symbol conversion failure: %s --> %s", expected, actual); 400 } 401 } 402 #endif 403 404 return h_obj; 405 } 406 407 // Converts a C string to a Java String based on current encoding 408 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 409 assert(str != nullptr, "bad arguments"); 410 411 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *); 412 static to_java_string_fn_t _to_java_string_fn = nullptr; 413 414 if (_to_java_string_fn == nullptr) { 415 void *lib_handle = os::native_java_library(); 416 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform")); 417 #if defined(_WIN32) && !defined(_WIN64) 418 if (_to_java_string_fn == nullptr) { 419 // On 32 bit Windows, also try __stdcall decorated name 420 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8")); 421 } 422 #endif 423 if (_to_java_string_fn == nullptr) { 424 fatal("JNU_NewStringPlatform missing"); 425 } 426 } 427 428 jstring js = nullptr; 429 { 430 JavaThread* thread = THREAD; 431 HandleMark hm(thread); 432 ThreadToNativeFromVM ttn(thread); 433 js = (_to_java_string_fn)(thread->jni_environment(), str); 434 } 435 436 Handle native_platform_string(THREAD, JNIHandles::resolve(js)); 437 JNIHandles::destroy_local(js); // destroy local JNIHandle. 438 return native_platform_string; 439 } 440 441 // Converts a Java String to a native C string that can be used for 442 // native OS calls. 443 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 444 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 445 static to_platform_string_fn_t _to_platform_string_fn = nullptr; 446 447 if (_to_platform_string_fn == nullptr) { 448 void *lib_handle = os::native_java_library(); 449 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 450 if (_to_platform_string_fn == nullptr) { 451 fatal("GetStringPlatformChars missing"); 452 } 453 } 454 455 char *native_platform_string; 456 jstring js; 457 { JavaThread* thread = THREAD; 458 js = (jstring) JNIHandles::make_local(thread, java_string()); 459 HandleMark hm(thread); 460 ThreadToNativeFromVM ttn(thread); 461 JNIEnv *env = thread->jni_environment(); 462 bool is_copy; 463 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 464 assert(is_copy == JNI_TRUE, "is_copy value changed"); 465 } 466 467 // Uses a store barrier and therefore needs to be in vm state 468 JNIHandles::destroy_local(js); 469 470 return native_platform_string; 471 } 472 473 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) { 474 ResourceMark rm(THREAD); 475 return create_from_str(java_name->as_klass_external_name(), THREAD); 476 } 477 478 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 479 jchar* result = as_unicode_string_or_null(java_string, length); 480 if (result == nullptr) { 481 THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 482 } 483 return result; 484 } 485 486 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) { 487 typeArrayOop value = java_lang_String::value(java_string); 488 length = java_lang_String::length(java_string, value); 489 bool is_latin1 = java_lang_String::is_latin1(java_string); 490 491 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 492 if (result != nullptr) { 493 if (!is_latin1) { 494 for (int index = 0; index < length; index++) { 495 result[index] = value->char_at(index); 496 } 497 } else { 498 for (int index = 0; index < length; index++) { 499 result[index] = ((jchar) value->byte_at(index)) & 0xff; 500 } 501 } 502 } 503 return result; 504 } 505 506 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) { 507 // The hash and hashIsZero fields are subject to a benign data race, 508 // making it crucial to ensure that any observable result of the 509 // calculation in this method stays correct under any possible read of 510 // these fields. Necessary restrictions to allow this to be correct 511 // without explicit memory fences or similar concurrency primitives is 512 // that we can ever only write to one of these two fields for a given 513 // String instance, and that the computation is idempotent and derived 514 // from immutable state 515 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized"); 516 if (java_lang_String::hash_is_set(java_string)) { 517 return java_string->int_field(_hash_offset); 518 } 519 520 typeArrayOop value = java_lang_String::value(java_string); 521 int length = java_lang_String::length(java_string, value); 522 bool is_latin1 = java_lang_String::is_latin1(java_string); 523 524 unsigned int hash = 0; 525 if (length > 0) { 526 if (is_latin1) { 527 hash = java_lang_String::hash_code(value->byte_at_addr(0), length); 528 } else { 529 hash = java_lang_String::hash_code(value->char_at_addr(0), length); 530 } 531 } 532 533 if (update) { 534 if (hash != 0) { 535 java_string->int_field_put(_hash_offset, hash); 536 } else { 537 java_string->bool_field_put(_hashIsZero_offset, true); 538 } 539 } 540 return hash; 541 } 542 543 unsigned int java_lang_String::hash_code(oop java_string) { 544 return hash_code_impl(java_string, /*update=*/true); 545 } 546 547 unsigned int java_lang_String::hash_code_noupdate(oop java_string) { 548 return hash_code_impl(java_string, /*update=*/false); 549 } 550 551 552 char* java_lang_String::as_quoted_ascii(oop java_string) { 553 typeArrayOop value = java_lang_String::value(java_string); 554 int length = java_lang_String::length(java_string, value); 555 bool is_latin1 = java_lang_String::is_latin1(java_string); 556 557 if (length == 0) return nullptr; 558 559 char* result; 560 size_t result_length; 561 if (!is_latin1) { 562 jchar* base = value->char_at_addr(0); 563 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 564 result = NEW_RESOURCE_ARRAY(char, result_length); 565 UNICODE::as_quoted_ascii(base, length, result, result_length); 566 } else { 567 jbyte* base = value->byte_at_addr(0); 568 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 569 result = NEW_RESOURCE_ARRAY(char, result_length); 570 UNICODE::as_quoted_ascii(base, length, result, result_length); 571 } 572 assert(result_length >= (size_t)length + 1, "must not be shorter"); 573 assert(result_length == strlen(result) + 1, "must match"); 574 return result; 575 } 576 577 Symbol* java_lang_String::as_symbol(oop java_string) { 578 typeArrayOop value = java_lang_String::value(java_string); 579 int length = java_lang_String::length(java_string, value); 580 bool is_latin1 = java_lang_String::is_latin1(java_string); 581 if (!is_latin1) { 582 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0); 583 Symbol* sym = SymbolTable::new_symbol(base, length); 584 return sym; 585 } else { 586 ResourceMark rm; 587 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 588 size_t utf8_len = static_cast<size_t>(length); 589 const char* base = UNICODE::as_utf8(position, utf8_len); 590 Symbol* sym = SymbolTable::new_symbol(base, checked_cast<int>(utf8_len)); 591 return sym; 592 } 593 } 594 595 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 596 typeArrayOop value = java_lang_String::value(java_string); 597 int length = java_lang_String::length(java_string, value); 598 bool is_latin1 = java_lang_String::is_latin1(java_string); 599 if (!is_latin1) { 600 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0); 601 return SymbolTable::probe_unicode(base, length); 602 } else { 603 ResourceMark rm; 604 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 605 size_t utf8_len = static_cast<size_t>(length); 606 const char* base = UNICODE::as_utf8(position, utf8_len); 607 return SymbolTable::probe(base, checked_cast<int>(utf8_len)); 608 } 609 } 610 611 size_t java_lang_String::utf8_length(oop java_string, typeArrayOop value) { 612 assert(value_equals(value, java_lang_String::value(java_string)), 613 "value must be same as java_lang_String::value(java_string)"); 614 int length = java_lang_String::length(java_string, value); 615 if (length == 0) { 616 return 0; 617 } 618 if (!java_lang_String::is_latin1(java_string)) { 619 return UNICODE::utf8_length(value->char_at_addr(0), length); 620 } else { 621 return UNICODE::utf8_length(value->byte_at_addr(0), length); 622 } 623 } 624 625 size_t java_lang_String::utf8_length(oop java_string) { 626 typeArrayOop value = java_lang_String::value(java_string); 627 return utf8_length(java_string, value); 628 } 629 630 int java_lang_String::utf8_length_as_int(oop java_string) { 631 typeArrayOop value = java_lang_String::value(java_string); 632 return utf8_length_as_int(java_string, value); 633 } 634 635 int java_lang_String::utf8_length_as_int(oop java_string, typeArrayOop value) { 636 assert(value_equals(value, java_lang_String::value(java_string)), 637 "value must be same as java_lang_String::value(java_string)"); 638 int length = java_lang_String::length(java_string, value); 639 if (length == 0) { 640 return 0; 641 } 642 if (!java_lang_String::is_latin1(java_string)) { 643 return UNICODE::utf8_length_as_int(value->char_at_addr(0), length); 644 } else { 645 return UNICODE::utf8_length_as_int(value->byte_at_addr(0), length); 646 } 647 } 648 649 char* java_lang_String::as_utf8_string(oop java_string) { 650 size_t length; 651 return as_utf8_string(java_string, length); 652 } 653 654 char* java_lang_String::as_utf8_string(oop java_string, size_t& length) { 655 typeArrayOop value = java_lang_String::value(java_string); 656 // `length` is used as the incoming number of characters to 657 // convert, and then set as the number of bytes in the UTF8 sequence. 658 length = java_lang_String::length(java_string, value); 659 bool is_latin1 = java_lang_String::is_latin1(java_string); 660 if (!is_latin1) { 661 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0); 662 return UNICODE::as_utf8(position, length); 663 } else { 664 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 665 return UNICODE::as_utf8(position, length); 666 } 667 } 668 669 // Uses a provided buffer if it's sufficiently large, otherwise allocates 670 // a resource array to fit 671 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& utf8_len) { 672 typeArrayOop value = java_lang_String::value(java_string); 673 int len = java_lang_String::length(java_string, value); 674 bool is_latin1 = java_lang_String::is_latin1(java_string); 675 if (!is_latin1) { 676 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0); 677 utf8_len = UNICODE::utf8_length(position, len); 678 if (utf8_len >= buflen) { 679 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 680 } 681 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 682 } else { 683 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0); 684 utf8_len = UNICODE::utf8_length(position, len); 685 if (utf8_len >= buflen) { 686 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 687 } 688 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 689 } 690 } 691 692 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen) { 693 assert(value_equals(value, java_lang_String::value(java_string)), 694 "value must be same as java_lang_String::value(java_string)"); 695 int length = java_lang_String::length(java_string, value); 696 bool is_latin1 = java_lang_String::is_latin1(java_string); 697 if (!is_latin1) { 698 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0); 699 return UNICODE::as_utf8(position, length, buf, buflen); 700 } else { 701 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 702 return UNICODE::as_utf8(position, length, buf, buflen); 703 } 704 } 705 706 char* java_lang_String::as_utf8_string(oop java_string, char* buf, size_t buflen) { 707 typeArrayOop value = java_lang_String::value(java_string); 708 return as_utf8_string(java_string, value, buf, buflen); 709 } 710 711 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 712 // `length` is used as the incoming number of characters to 713 // convert, and then set as the number of bytes in the UTF8 sequence. 714 size_t length = static_cast<size_t>(len); 715 typeArrayOop value = java_lang_String::value(java_string); 716 bool is_latin1 = java_lang_String::is_latin1(java_string); 717 assert(start + len <= java_lang_String::length(java_string), "just checking"); 718 if (!is_latin1) { 719 jchar* position = value->char_at_addr(start); 720 return UNICODE::as_utf8(position, length); 721 } else { 722 jbyte* position = value->byte_at_addr(start); 723 return UNICODE::as_utf8(position, length); 724 } 725 } 726 727 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen) { 728 assert(value_equals(value, java_lang_String::value(java_string)), 729 "value must be same as java_lang_String::value(java_string)"); 730 assert(start + len <= java_lang_String::length(java_string), "just checking"); 731 bool is_latin1 = java_lang_String::is_latin1(java_string); 732 if (!is_latin1) { 733 jchar* position = value->char_at_addr(start); 734 return UNICODE::as_utf8(position, len, buf, buflen); 735 } else { 736 jbyte* position = value->byte_at_addr(start); 737 return UNICODE::as_utf8(position, len, buf, buflen); 738 } 739 } 740 741 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) { 742 assert(java_string->klass() == vmClasses::String_klass(), 743 "must be java_string"); 744 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 745 int length = java_lang_String::length(java_string, value); 746 if (length != len) { 747 return false; 748 } 749 bool is_latin1 = java_lang_String::is_latin1(java_string); 750 if (!is_latin1) { 751 for (int i = 0; i < len; i++) { 752 if (value->char_at(i) != chars[i]) { 753 return false; 754 } 755 } 756 } else { 757 for (int i = 0; i < len; i++) { 758 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 759 return false; 760 } 761 } 762 } 763 return true; 764 } 765 766 bool java_lang_String::equals(oop str1, oop str2) { 767 assert(str1->klass() == vmClasses::String_klass(), 768 "must be java String"); 769 assert(str2->klass() == vmClasses::String_klass(), 770 "must be java String"); 771 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1); 772 bool is_latin1 = java_lang_String::is_latin1(str1); 773 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2); 774 bool is_latin2 = java_lang_String::is_latin1(str2); 775 776 if (is_latin1 != is_latin2) { 777 // Strings with different coders are never equal. 778 return false; 779 } 780 return value_equals(value1, value2); 781 } 782 783 // Print the given string to the given outputStream, limiting the output to 784 // at most max_length of the string's characters. If the length exceeds the 785 // limit we print an abridged version of the string with the "middle" elided 786 // and replaced by " ... (N characters ommitted) ... ". If max_length is odd 787 // it is treated as max_length-1. 788 void java_lang_String::print(oop java_string, outputStream* st, int max_length) { 789 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string"); 790 // We need at least two characters to print A ... B 791 assert(max_length > 1, "invalid max_length: %d", max_length); 792 793 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 794 795 if (value == nullptr) { 796 // This can happen if, e.g., printing a String 797 // object before its initializer has been called 798 st->print("nullptr"); 799 return; 800 } 801 802 int length = java_lang_String::length(java_string, value); 803 bool is_latin1 = java_lang_String::is_latin1(java_string); 804 805 bool abridge = length > max_length; 806 807 st->print("\""); 808 for (int index = 0; index < length; index++) { 809 // If we need to abridge and we've printed half the allowed characters 810 // then jump to the tail of the string. 811 if (abridge && index >= max_length / 2) { 812 st->print(" ... (%d characters ommitted) ... ", length - 2 * (max_length / 2)); 813 index = length - (max_length / 2); 814 abridge = false; // only do this once 815 } 816 jchar c = (!is_latin1) ? value->char_at(index) : 817 ((jchar) value->byte_at(index)) & 0xff; 818 if (c < ' ') { 819 st->print("\\x%02X", c); // print control characters e.g. \x0A 820 } else { 821 st->print("%c", c); 822 } 823 } 824 st->print("\""); 825 826 if (length > max_length) { 827 st->print(" (abridged) "); 828 } 829 } 830 831 // java_lang_Class 832 833 int java_lang_Class::_klass_offset; 834 int java_lang_Class::_array_klass_offset; 835 int java_lang_Class::_oop_size_offset; 836 int java_lang_Class::_static_oop_field_count_offset; 837 int java_lang_Class::_class_loader_offset; 838 int java_lang_Class::_module_offset; 839 int java_lang_Class::_protection_domain_offset; 840 int java_lang_Class::_component_mirror_offset; 841 int java_lang_Class::_init_lock_offset; 842 int java_lang_Class::_signers_offset; 843 int java_lang_Class::_name_offset; 844 int java_lang_Class::_source_file_offset; 845 int java_lang_Class::_classData_offset; 846 int java_lang_Class::_classRedefinedCount_offset; 847 848 bool java_lang_Class::_offsets_computed = false; 849 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr; 850 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr; 851 852 #ifdef ASSERT 853 inline static void assert_valid_static_string_field(fieldDescriptor* fd) { 854 assert(fd->has_initial_value(), "caller should have checked this"); 855 assert(fd->field_type() == T_OBJECT, "caller should have checked this"); 856 assert(fd->signature() == vmSymbols::string_signature(), "just checking"); 857 } 858 #endif 859 860 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 861 DEBUG_ONLY(assert_valid_static_string_field(fd);) 862 oop string = fd->string_initial_value(CHECK); 863 mirror()->obj_field_put(fd->offset(), string); 864 } 865 866 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) { 867 assert(fd->has_initial_value(), "caller should have checked this"); 868 BasicType t = fd->field_type(); 869 switch (t) { 870 case T_BYTE: 871 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value())); 872 break; 873 case T_BOOLEAN: 874 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value())); 875 break; 876 case T_CHAR: 877 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value())); 878 break; 879 case T_SHORT: 880 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value())); 881 break; 882 case T_INT: 883 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 884 break; 885 case T_FLOAT: 886 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 887 break; 888 case T_DOUBLE: 889 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 890 break; 891 case T_LONG: 892 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 893 break; 894 default: 895 // Illegal ConstantValue attribute in class file should have been 896 // caught during classfile parsing. 897 ShouldNotReachHere(); 898 } 899 } 900 901 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 902 assert(mirror.not_null() && fd->is_static(), "just checking"); 903 if (fd->has_initial_value()) { 904 if (fd->field_type() != T_OBJECT) { 905 initialize_static_primitive_field(fd, mirror); 906 } else { 907 initialize_static_string_field(fd, mirror, CHECK); 908 } 909 } 910 } 911 912 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 913 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 914 915 // If the offset was read from the shared archive, it was fixed up already 916 if (!k->is_shared()) { 917 if (k->is_instance_klass()) { 918 // During bootstrap, java.lang.Class wasn't loaded so static field 919 // offsets were computed without the size added it. Go back and 920 // update all the static field offsets to included the size. 921 922 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow 923 // content updates. So the FieldInfo stream has to be decompressed into a temporary array, 924 // static fields offsets are updated in this array before reencoding everything into 925 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream. 926 927 int java_fields; 928 int injected_fields; 929 InstanceKlass* ik = InstanceKlass::cast(k); 930 GrowableArray<FieldInfo>* fields = 931 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(), 932 &java_fields, &injected_fields); 933 for (int i = 0; i < fields->length(); i++) { 934 FieldInfo* fi = fields->adr_at(i); 935 if (fi->access_flags().is_static()) { 936 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields()); 937 } 938 } 939 Array<u1>* old_stream = ik->fieldinfo_stream(); 940 assert(fields->length() == (java_fields + injected_fields), "Must be"); 941 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK); 942 ik->set_fieldinfo_stream(new_fis); 943 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream); 944 } 945 } 946 947 if (k->is_shared() && k->has_archived_mirror_index()) { 948 if (ArchiveHeapLoader::is_in_use()) { 949 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK); 950 assert(present, "Missing archived mirror for %s", k->external_name()); 951 return; 952 } else { 953 k->clear_java_mirror_handle(); 954 k->clear_archived_mirror_index(); 955 } 956 } 957 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK); 958 } 959 960 void java_lang_Class::initialize_mirror_fields(Klass* k, 961 Handle mirror, 962 Handle protection_domain, 963 Handle classData, 964 TRAPS) { 965 // Allocate a simple java object for a lock. 966 // This needs to be a java object because during class initialization 967 // it can be held across a java call. 968 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 969 set_init_lock(mirror(), r); 970 971 // Set protection domain also 972 set_protection_domain(mirror(), protection_domain()); 973 974 // Initialize static fields 975 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 976 977 // Set classData 978 set_class_data(mirror(), classData()); 979 } 980 981 // Set the java.lang.Module module field in the java_lang_Class mirror 982 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) { 983 if (module.is_null()) { 984 // During startup, the module may be null only if java.base has not been defined yet. 985 // Put the class on the fixup_module_list to patch later when the java.lang.Module 986 // for java.base is known. But note that since we captured the null module another 987 // thread may have completed that initialization. 988 989 bool javabase_was_defined = false; 990 { 991 MutexLocker m1(current, Module_lock); 992 // Keep list of classes needing java.base module fixup 993 if (!ModuleEntryTable::javabase_defined()) { 994 assert(k->java_mirror() != nullptr, "Class's mirror is null"); 995 k->class_loader_data()->inc_keep_alive_ref_count(); 996 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized"); 997 fixup_module_field_list()->push(k); 998 } else { 999 javabase_was_defined = true; 1000 } 1001 } 1002 1003 // If java.base was already defined then patch this particular class with java.base. 1004 if (javabase_was_defined) { 1005 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 1006 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr, 1007 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 1008 Handle javabase_handle(current, javabase_entry->module()); 1009 set_module(mirror(), javabase_handle()); 1010 } 1011 } else { 1012 assert(Universe::is_module_initialized() || 1013 (ModuleEntryTable::javabase_defined() && 1014 (module() == ModuleEntryTable::javabase_moduleEntry()->module())), 1015 "Incorrect java.lang.Module specification while creating mirror"); 1016 set_module(mirror(), module()); 1017 } 1018 } 1019 1020 // Statically allocate fixup lists because they always get created. 1021 void java_lang_Class::allocate_fixup_lists() { 1022 GrowableArray<Klass*>* mirror_list = 1023 new (mtClass) GrowableArray<Klass*>(40, mtClass); 1024 set_fixup_mirror_list(mirror_list); 1025 1026 GrowableArray<Klass*>* module_list = 1027 new (mtModule) GrowableArray<Klass*>(500, mtModule); 1028 set_fixup_module_field_list(module_list); 1029 } 1030 1031 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData, 1032 Handle& mirror, Handle& comp_mirror, TRAPS) { 1033 // Allocate mirror (java.lang.Class instance) 1034 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK); 1035 mirror = Handle(THREAD, mirror_oop); 1036 1037 // Setup indirection from mirror->klass 1038 set_klass(mirror(), k); 1039 1040 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 1041 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 1042 1043 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 1044 1045 // It might also have a component mirror. This mirror must already exist. 1046 if (k->is_array_klass()) { 1047 if (k->is_flatArray_klass()) { 1048 Klass* element_klass = (Klass*) FlatArrayKlass::cast(k)->element_klass(); 1049 assert(element_klass->is_inline_klass(), "Must be inline type component"); 1050 if (is_scratch) { 1051 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass)); 1052 } else { 1053 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 1054 } 1055 } else if (k->is_typeArray_klass()) { 1056 BasicType type = TypeArrayKlass::cast(k)->element_type(); 1057 if (is_scratch) { 1058 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type)); 1059 } else { 1060 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 1061 } 1062 } else { 1063 assert(k->is_objArray_klass(), "Must be"); 1064 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1065 assert(element_klass != nullptr, "Must have an element klass"); 1066 oop comp_oop = element_klass->java_mirror(); 1067 if (is_scratch) { 1068 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass)); 1069 } else { 1070 comp_mirror = Handle(THREAD, comp_oop); 1071 } 1072 } 1073 assert(comp_mirror() != nullptr, "must have a mirror"); 1074 1075 // Two-way link between the array klass and its component mirror: 1076 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 1077 set_component_mirror(mirror(), comp_mirror()); 1078 // See below for ordering dependencies between field array_klass in component mirror 1079 // and java_mirror in this klass. 1080 } else { 1081 assert(k->is_instance_klass(), "Must be"); 1082 1083 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD); 1084 if (HAS_PENDING_EXCEPTION) { 1085 // If any of the fields throws an exception like OOM remove the klass field 1086 // from the mirror so GC doesn't follow it after the klass has been deallocated. 1087 // This mirror looks like a primitive type, which logically it is because it 1088 // it represents no class. 1089 set_klass(mirror(), nullptr); 1090 return; 1091 } 1092 } 1093 } 1094 1095 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 1096 Handle module, Handle protection_domain, 1097 Handle classData, TRAPS) { 1098 assert(k != nullptr, "Use create_basic_type_mirror for primitive types"); 1099 assert(k->java_mirror() == nullptr, "should only assign mirror once"); 1100 1101 // Use this moment of initialization to cache modifier_flags also, 1102 // to support Class.getModifiers(). Instance classes recalculate 1103 // the cached flags after the class file is parsed, but before the 1104 // class is put into the system dictionary. 1105 int computed_modifiers = k->compute_modifier_flags(); 1106 k->set_modifier_flags(computed_modifiers); 1107 // Class_klass has to be loaded because it is used to allocate 1108 // the mirror. 1109 if (vmClasses::Class_klass_loaded()) { 1110 Handle mirror; 1111 Handle comp_mirror; 1112 1113 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK); 1114 1115 // set the classLoader field in the java_lang_Class instance 1116 assert(class_loader() == k->class_loader(), "should be same"); 1117 set_class_loader(mirror(), class_loader()); 1118 1119 // Setup indirection from klass->mirror 1120 // after any exceptions can happen during allocations. 1121 k->set_java_mirror(mirror); 1122 1123 // Set the module field in the java_lang_Class instance. This must be done 1124 // after the mirror is set. 1125 set_mirror_module_field(THREAD, k, mirror, module); 1126 1127 if (comp_mirror() != nullptr) { 1128 // Set after k->java_mirror() is published, because compiled code running 1129 // concurrently doesn't expect a k to have a null java_mirror. 1130 release_set_array_klass(comp_mirror(), k); 1131 } 1132 1133 if (CDSConfig::is_dumping_heap()) { 1134 create_scratch_mirror(k, CHECK); 1135 } 1136 } else { 1137 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized"); 1138 fixup_mirror_list()->push(k); 1139 } 1140 } 1141 1142 #if INCLUDE_CDS_JAVA_HEAP 1143 // The "scratch mirror" stores the states of the mirror object that can be 1144 // decided at dump time (such as the initial values of the static fields, the 1145 // component mirror, etc). At runtime, more information is added to it by 1146 // java_lang_Class::restore_archived_mirror(). 1147 // 1148 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror() 1149 // produces the same result as /*runtime*/create_mirror(). 1150 // 1151 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the 1152 // latter may contain dumptime-specific information that cannot be archived 1153 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution). 1154 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) { 1155 if ((k->class_loader() != nullptr && 1156 k->class_loader() != SystemDictionary::java_platform_loader() && 1157 k->class_loader() != SystemDictionary::java_system_loader())) { 1158 // We only archive the mirrors of classes loaded by the built-in loaders 1159 return; 1160 } 1161 1162 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime 1163 Handle mirror; 1164 Handle comp_mirror; 1165 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK); 1166 1167 if (comp_mirror() != nullptr) { 1168 release_set_array_klass(comp_mirror(), k); 1169 } 1170 1171 HeapShared::set_scratch_java_mirror(k, mirror()); 1172 } 1173 1174 // Returns true if the mirror is updated, false if no archived mirror 1175 // data is present. After the archived mirror object is restored, the 1176 // shared klass' _has_raw_archived_mirror flag is cleared. 1177 bool java_lang_Class::restore_archived_mirror(Klass *k, 1178 Handle class_loader, Handle module, 1179 Handle protection_domain, TRAPS) { 1180 // Postpone restoring archived mirror until java.lang.Class is loaded. Please 1181 // see more details in vmClasses::resolve_all(). 1182 if (!vmClasses::Class_klass_loaded()) { 1183 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized"); 1184 fixup_mirror_list()->push(k); 1185 return true; 1186 } 1187 1188 oop m = k->archived_java_mirror(); 1189 assert(m != nullptr, "must have stored non-null archived mirror"); 1190 1191 // Sanity: clear it now to prevent re-initialization if any of the following fails 1192 k->clear_archived_mirror_index(); 1193 1194 // mirror is archived, restore 1195 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m)); 1196 assert(as_Klass(m) == k, "must be"); 1197 Handle mirror(THREAD, m); 1198 1199 if (!k->is_array_klass()) { 1200 // - local static final fields with initial values were initialized at dump time 1201 1202 // create the init_lock 1203 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false)); 1204 set_init_lock(mirror(), r); 1205 1206 if (protection_domain.not_null()) { 1207 set_protection_domain(mirror(), protection_domain()); 1208 } 1209 } 1210 1211 assert(class_loader() == k->class_loader(), "should be same"); 1212 if (class_loader.not_null()) { 1213 set_class_loader(mirror(), class_loader()); 1214 } 1215 1216 k->set_java_mirror(mirror); 1217 1218 set_mirror_module_field(THREAD, k, mirror, module); 1219 1220 if (log_is_enabled(Trace, cds, heap, mirror)) { 1221 ResourceMark rm(THREAD); 1222 log_trace(cds, heap, mirror)( 1223 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1224 } 1225 1226 return true; 1227 } 1228 #endif // INCLUDE_CDS_JAVA_HEAP 1229 1230 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1231 assert(_module_offset != 0, "must have been computed already"); 1232 set_module(k->java_mirror(), module()); 1233 } 1234 1235 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) { 1236 assert(_oop_size_offset != 0, "must be set"); 1237 assert(size > 0, "Oop size must be greater than zero, not " SIZE_FORMAT, size); 1238 assert(size <= INT_MAX, "Lossy conversion: " SIZE_FORMAT, size); 1239 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size; 1240 } 1241 1242 int java_lang_Class::static_oop_field_count(oop java_class) { 1243 assert(_static_oop_field_count_offset != 0, "must be set"); 1244 return java_class->int_field(_static_oop_field_count_offset); 1245 } 1246 1247 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1248 assert(_static_oop_field_count_offset != 0, "must be set"); 1249 java_class->int_field_put(_static_oop_field_count_offset, size); 1250 } 1251 1252 oop java_lang_Class::protection_domain(oop java_class) { 1253 assert(_protection_domain_offset != 0, "must be set"); 1254 return java_class->obj_field(_protection_domain_offset); 1255 } 1256 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1257 assert(_protection_domain_offset != 0, "must be set"); 1258 java_class->obj_field_put(_protection_domain_offset, pd); 1259 } 1260 1261 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1262 assert(_component_mirror_offset != 0, "must be set"); 1263 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1264 } 1265 oop java_lang_Class::component_mirror(oop java_class) { 1266 assert(_component_mirror_offset != 0, "must be set"); 1267 return java_class->obj_field(_component_mirror_offset); 1268 } 1269 1270 oop java_lang_Class::init_lock(oop java_class) { 1271 assert(_init_lock_offset != 0, "must be set"); 1272 return java_class->obj_field(_init_lock_offset); 1273 } 1274 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 1275 assert(_init_lock_offset != 0, "must be set"); 1276 java_class->obj_field_put(_init_lock_offset, init_lock); 1277 } 1278 1279 objArrayOop java_lang_Class::signers(oop java_class) { 1280 assert(_signers_offset != 0, "must be set"); 1281 return (objArrayOop)java_class->obj_field(_signers_offset); 1282 } 1283 1284 oop java_lang_Class::class_data(oop java_class) { 1285 assert(_classData_offset != 0, "must be set"); 1286 return java_class->obj_field(_classData_offset); 1287 } 1288 void java_lang_Class::set_class_data(oop java_class, oop class_data) { 1289 assert(_classData_offset != 0, "must be set"); 1290 java_class->obj_field_put(_classData_offset, class_data); 1291 } 1292 1293 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1294 assert(_class_loader_offset != 0, "offsets should have been initialized"); 1295 java_class->obj_field_put(_class_loader_offset, loader); 1296 } 1297 1298 oop java_lang_Class::class_loader(oop java_class) { 1299 assert(_class_loader_offset != 0, "must be set"); 1300 return java_class->obj_field(_class_loader_offset); 1301 } 1302 1303 oop java_lang_Class::module(oop java_class) { 1304 assert(_module_offset != 0, "must be set"); 1305 return java_class->obj_field(_module_offset); 1306 } 1307 1308 void java_lang_Class::set_module(oop java_class, oop module) { 1309 assert(_module_offset != 0, "must be set"); 1310 java_class->obj_field_put(_module_offset, module); 1311 } 1312 1313 oop java_lang_Class::name(Handle java_class, TRAPS) { 1314 assert(_name_offset != 0, "must be set"); 1315 oop o = java_class->obj_field(_name_offset); 1316 if (o == nullptr) { 1317 o = StringTable::intern(as_external_name(java_class()), THREAD); 1318 java_class->obj_field_put(_name_offset, o); 1319 } 1320 return o; 1321 } 1322 1323 oop java_lang_Class::source_file(oop java_class) { 1324 assert(_source_file_offset != 0, "must be set"); 1325 return java_class->obj_field(_source_file_offset); 1326 } 1327 1328 void java_lang_Class::set_source_file(oop java_class, oop source_file) { 1329 assert(_source_file_offset != 0, "must be set"); 1330 java_class->obj_field_put(_source_file_offset, source_file); 1331 } 1332 1333 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1334 // This should be improved by adding a field at the Java level or by 1335 // introducing a new VM klass (see comment in ClassFileParser) 1336 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL); 1337 if (type != T_VOID) { 1338 Klass* aklass = Universe::typeArrayKlass(type); 1339 assert(aklass != nullptr, "correct bootstrap"); 1340 release_set_array_klass(java_class, aklass); 1341 } 1342 #ifdef ASSERT 1343 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass()); 1344 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1345 #endif 1346 return java_class; 1347 } 1348 1349 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1350 assert(is_instance(java_class), "must be a Class object"); 1351 java_class->metadata_field_put(_klass_offset, klass); 1352 } 1353 1354 1355 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1356 assert(is_instance(java_class), "must be a Class object"); 1357 Symbol* name = nullptr; 1358 bool is_instance = false; 1359 if (is_primitive(java_class)) { 1360 name = vmSymbols::type_signature(primitive_type(java_class)); 1361 } else { 1362 Klass* k = as_Klass(java_class); 1363 is_instance = k->is_instance_klass(); 1364 name = k->name(); 1365 } 1366 if (name == nullptr) { 1367 st->print("<null>"); 1368 return; 1369 } 1370 if (is_instance) { 1371 st->print("L"); 1372 } 1373 st->write((char*) name->base(), (int) name->utf8_length()); 1374 if (is_instance) st->print(";"); 1375 } 1376 1377 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) { 1378 assert(is_instance(java_class), "must be a Class object"); 1379 Symbol* name; 1380 if (is_primitive(java_class)) { 1381 name = vmSymbols::type_signature(primitive_type(java_class)); 1382 // Because this can create a new symbol, the caller has to decrement 1383 // the refcount, so make adjustment here and below for symbols returned 1384 // that are not created or incremented due to a successful lookup. 1385 name->increment_refcount(); 1386 } else { 1387 Klass* k = as_Klass(java_class); 1388 if (!k->is_instance_klass()) { 1389 name = k->name(); 1390 name->increment_refcount(); 1391 } else { 1392 ResourceMark rm; 1393 const char* sigstr = k->signature_name(); 1394 int siglen = (int) strlen(sigstr); 1395 if (!intern_if_not_found) { 1396 name = SymbolTable::probe(sigstr, siglen); 1397 } else { 1398 name = SymbolTable::new_symbol(sigstr, siglen); 1399 } 1400 } 1401 } 1402 return name; 1403 } 1404 1405 // Returns the Java name for this Java mirror (Resource allocated) 1406 // See Klass::external_name(). 1407 // For primitive type Java mirrors, its type name is returned. 1408 const char* java_lang_Class::as_external_name(oop java_class) { 1409 assert(is_instance(java_class), "must be a Class object"); 1410 const char* name = nullptr; 1411 if (is_primitive(java_class)) { 1412 name = type2name(primitive_type(java_class)); 1413 } else { 1414 name = as_Klass(java_class)->external_name(); 1415 } 1416 if (name == nullptr) { 1417 name = "<null>"; 1418 } 1419 return name; 1420 } 1421 1422 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1423 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1424 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass"); 1425 return k; 1426 } 1427 1428 1429 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1430 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1431 if (klass->is_flatArray_klass() || (klass->is_objArray_klass() && ObjArrayKlass::cast(klass)->is_null_free_array_klass())) { 1432 // TODO 8336006 Ignore flat / null-free arrays 1433 return; 1434 } 1435 java_class->release_metadata_field_put(_array_klass_offset, klass); 1436 } 1437 1438 1439 BasicType java_lang_Class::primitive_type(oop java_class) { 1440 assert(is_primitive(java_class), "just checking"); 1441 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1442 BasicType type = T_VOID; 1443 if (ak != nullptr) { 1444 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1445 type = ArrayKlass::cast(ak)->element_type(); 1446 } else { 1447 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1448 } 1449 #ifdef ASSERT 1450 if (CDSConfig::is_dumping_heap()) { 1451 oop mirror = Universe::java_mirror(type); 1452 oop scratch_mirror = HeapShared::scratch_java_mirror(type); 1453 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent"); 1454 } else { 1455 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1456 } 1457 #endif 1458 return type; 1459 } 1460 1461 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1462 assert(is_instance(java_class), "must be a Class object"); 1463 if (is_primitive(java_class)) { 1464 if (reference_klass != nullptr) 1465 (*reference_klass) = nullptr; 1466 return primitive_type(java_class); 1467 } else { 1468 if (reference_klass != nullptr) 1469 (*reference_klass) = as_Klass(java_class); 1470 return T_OBJECT; 1471 } 1472 } 1473 1474 1475 oop java_lang_Class::primitive_mirror(BasicType t) { 1476 oop mirror = Universe::java_mirror(t); 1477 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class"); 1478 assert(is_primitive(mirror), "must be primitive"); 1479 return mirror; 1480 } 1481 1482 #define CLASS_FIELDS_DO(macro) \ 1483 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \ 1484 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1485 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1486 macro(_module_offset, k, "module", module_signature, false); \ 1487 macro(_name_offset, k, "name", string_signature, false); \ 1488 macro(_classData_offset, k, "classData", object_signature, false); \ 1489 macro(_signers_offset, k, "signers", object_array_signature, false); 1490 1491 void java_lang_Class::compute_offsets() { 1492 if (_offsets_computed) { 1493 return; 1494 } 1495 1496 _offsets_computed = true; 1497 1498 InstanceKlass* k = vmClasses::Class_klass(); 1499 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1500 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1501 } 1502 1503 #if INCLUDE_CDS 1504 void java_lang_Class::serialize_offsets(SerializeClosure* f) { 1505 f->do_bool(&_offsets_computed); 1506 1507 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1508 1509 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1510 } 1511 #endif 1512 1513 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1514 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1515 return the_class_mirror->int_field(_classRedefinedCount_offset); 1516 } 1517 1518 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1519 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1520 the_class_mirror->int_field_put(_classRedefinedCount_offset, value); 1521 } 1522 1523 1524 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1525 // platform thread structure, and a eetop offset which was used for thread 1526 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1527 // merged, so in the HotSpot VM we just use the eetop field for the thread 1528 // instead of the privateInfo_offset. 1529 // 1530 // Note: The stackSize field is only present starting in 1.4. 1531 1532 int java_lang_Thread_FieldHolder::_group_offset; 1533 int java_lang_Thread_FieldHolder::_priority_offset; 1534 int java_lang_Thread_FieldHolder::_stackSize_offset; 1535 int java_lang_Thread_FieldHolder::_daemon_offset; 1536 int java_lang_Thread_FieldHolder::_thread_status_offset; 1537 1538 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \ 1539 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1540 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1541 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1542 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1543 macro(_thread_status_offset, k, "threadStatus", int_signature, false) 1544 1545 void java_lang_Thread_FieldHolder::compute_offsets() { 1546 assert(_group_offset == 0, "offsets should be initialized only once"); 1547 1548 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass(); 1549 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1550 } 1551 1552 #if INCLUDE_CDS 1553 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) { 1554 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1555 } 1556 #endif 1557 1558 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) { 1559 return holder->obj_field(_group_offset); 1560 } 1561 1562 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) { 1563 return (ThreadPriority)holder->int_field(_priority_offset); 1564 } 1565 1566 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) { 1567 holder->int_field_put(_priority_offset, priority); 1568 } 1569 1570 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) { 1571 return holder->long_field(_stackSize_offset); 1572 } 1573 1574 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) { 1575 return holder->bool_field(_daemon_offset) != 0; 1576 } 1577 1578 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) { 1579 assert(val, "daemon status is never turned off"); 1580 holder->bool_field_put(_daemon_offset, val); 1581 } 1582 1583 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) { 1584 holder->int_field_put(_thread_status_offset, static_cast<int>(status)); 1585 } 1586 1587 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) { 1588 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset)); 1589 } 1590 1591 1592 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0; 1593 1594 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \ 1595 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true); 1596 1597 void java_lang_Thread_Constants::compute_offsets() { 1598 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once"); 1599 1600 InstanceKlass* k = vmClasses::Thread_Constants_klass(); 1601 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1602 } 1603 1604 #if INCLUDE_CDS 1605 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) { 1606 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1607 } 1608 #endif 1609 1610 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() { 1611 InstanceKlass* k = vmClasses::Thread_Constants_klass(); 1612 oop base = k->static_field_base_raw(); 1613 return base->obj_field(_static_VTHREAD_GROUP_offset); 1614 } 1615 1616 1617 int java_lang_Thread::_holder_offset; 1618 int java_lang_Thread::_name_offset; 1619 int java_lang_Thread::_contextClassLoader_offset; 1620 int java_lang_Thread::_inheritedAccessControlContext_offset; 1621 int java_lang_Thread::_eetop_offset; 1622 int java_lang_Thread::_jvmti_thread_state_offset; 1623 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset; 1624 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset; 1625 int java_lang_Thread::_interrupted_offset; 1626 int java_lang_Thread::_interruptLock_offset; 1627 int java_lang_Thread::_tid_offset; 1628 int java_lang_Thread::_continuation_offset; 1629 int java_lang_Thread::_park_blocker_offset; 1630 int java_lang_Thread::_scopedValueBindings_offset; 1631 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;) 1632 1633 #define THREAD_FIELDS_DO(macro) \ 1634 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \ 1635 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1636 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \ 1637 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \ 1638 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1639 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \ 1640 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \ 1641 macro(_tid_offset, k, "tid", long_signature, false); \ 1642 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \ 1643 macro(_continuation_offset, k, "cont", continuation_signature, false); \ 1644 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false); 1645 1646 void java_lang_Thread::compute_offsets() { 1647 assert(_holder_offset == 0, "offsets should be initialized only once"); 1648 1649 InstanceKlass* k = vmClasses::Thread_klass(); 1650 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1651 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1652 } 1653 1654 #if INCLUDE_CDS 1655 void java_lang_Thread::serialize_offsets(SerializeClosure* f) { 1656 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1657 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1658 } 1659 #endif 1660 1661 JavaThread* java_lang_Thread::thread(oop java_thread) { 1662 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset)); 1663 } 1664 1665 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) { 1666 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset)); 1667 } 1668 1669 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1670 java_thread->address_field_put(_eetop_offset, (address)thread); 1671 } 1672 1673 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) { 1674 java_thread->release_address_field_put(_eetop_offset, (address)thread); 1675 } 1676 1677 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) { 1678 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset); 1679 } 1680 1681 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) { 1682 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state); 1683 } 1684 1685 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) { 1686 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset); 1687 } 1688 1689 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) { 1690 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked"); 1691 int val = VTMS_transition_disable_count(java_thread); 1692 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1); 1693 } 1694 1695 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) { 1696 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked"); 1697 int val = VTMS_transition_disable_count(java_thread); 1698 assert(val > 0, "VTMS_transition_disable_count should never be negative"); 1699 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1); 1700 } 1701 1702 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) { 1703 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset); 1704 } 1705 1706 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) { 1707 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val); 1708 } 1709 1710 int java_lang_Thread::is_in_VTMS_transition_offset() { 1711 return _jvmti_is_in_VTMS_transition_offset; 1712 } 1713 1714 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) { 1715 assert(java_thread != nullptr, "need a java_lang_Thread pointer here"); 1716 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr); 1717 } 1718 1719 oop java_lang_Thread::holder(oop java_thread) { 1720 // Note: may return null if the thread is still attaching 1721 return java_thread->obj_field(_holder_offset); 1722 } 1723 oop java_lang_Thread::interrupt_lock(oop java_thread) { 1724 return java_thread->obj_field(_interruptLock_offset); 1725 } 1726 1727 bool java_lang_Thread::interrupted(oop java_thread) { 1728 // Make sure the caller can safely access oops. 1729 assert(Thread::current()->is_VM_thread() || 1730 (JavaThread::current()->thread_state() != _thread_blocked && 1731 JavaThread::current()->thread_state() != _thread_in_native), 1732 "Unsafe access to oop"); 1733 return java_thread->bool_field_volatile(_interrupted_offset); 1734 } 1735 1736 void java_lang_Thread::set_interrupted(oop java_thread, bool val) { 1737 // Make sure the caller can safely access oops. 1738 assert(Thread::current()->is_VM_thread() || 1739 (JavaThread::current()->thread_state() != _thread_blocked && 1740 JavaThread::current()->thread_state() != _thread_in_native), 1741 "Unsafe access to oop"); 1742 java_thread->bool_field_put_volatile(_interrupted_offset, val); 1743 } 1744 1745 1746 oop java_lang_Thread::name(oop java_thread) { 1747 return java_thread->obj_field(_name_offset); 1748 } 1749 1750 1751 void java_lang_Thread::set_name(oop java_thread, oop name) { 1752 java_thread->obj_field_put(_name_offset, name); 1753 } 1754 1755 // Convenience macros for setting and getting Thread fields that 1756 // are actually stored in the FieldHolder object of the thread. 1757 // The FieldHolder can be null whilst a thread is attaching via 1758 // JNI, and when the main thread is attaching. 1759 1760 // The default value should be the default/zero initialized value 1761 // of the field as it would be in java.lang.Thread.FieldHolder. 1762 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \ 1763 { \ 1764 oop holder = java_lang_Thread::holder(java_thread); \ 1765 if (holder != nullptr) \ 1766 return java_lang_Thread_FieldHolder::field(holder); \ 1767 else \ 1768 return default_val; \ 1769 } 1770 1771 // We should never be trying to set a field of an attaching thread. 1772 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \ 1773 { \ 1774 oop holder = java_lang_Thread::holder(java_thread); \ 1775 assert(holder != nullptr, "Thread not fully initialized"); \ 1776 java_lang_Thread_FieldHolder::set_##field(holder, value); \ 1777 } 1778 1779 1780 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1781 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0); 1782 } 1783 1784 1785 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1786 SET_FIELDHOLDER_FIELD(java_thread, priority, priority) 1787 } 1788 1789 1790 oop java_lang_Thread::threadGroup(oop java_thread) { 1791 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr); 1792 } 1793 1794 1795 bool java_lang_Thread::is_alive(oop java_thread) { 1796 JavaThread* thr = java_lang_Thread::thread(java_thread); 1797 return (thr != nullptr); 1798 } 1799 1800 1801 bool java_lang_Thread::is_daemon(oop java_thread) { 1802 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false); 1803 } 1804 1805 1806 void java_lang_Thread::set_daemon(oop java_thread) { 1807 SET_FIELDHOLDER_FIELD(java_thread, daemon, true); 1808 } 1809 1810 oop java_lang_Thread::context_class_loader(oop java_thread) { 1811 return java_thread->obj_field(_contextClassLoader_offset); 1812 } 1813 1814 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1815 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1816 } 1817 1818 1819 jlong java_lang_Thread::stackSize(oop java_thread) { 1820 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0); 1821 } 1822 1823 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1824 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) { 1825 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status); 1826 } 1827 1828 // Read thread status value from threadStatus field in java.lang.Thread java class. 1829 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1830 // Make sure the caller is operating on behalf of the VM or is 1831 // running VM code (state == _thread_in_vm). 1832 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1833 JavaThread::current()->thread_state() == _thread_in_vm, 1834 "Java Thread is not running in vm"); 1835 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */); 1836 } 1837 1838 ByteSize java_lang_Thread::thread_id_offset() { 1839 return in_ByteSize(_tid_offset); 1840 } 1841 1842 oop java_lang_Thread::park_blocker(oop java_thread) { 1843 return java_thread->obj_field(_park_blocker_offset); 1844 } 1845 1846 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) { 1847 ThreadsListHandle tlh(JavaThread::current()); 1848 JavaThread* thread; 1849 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread); 1850 if (is_virtual) { 1851 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread); 1852 if (carrier_thread == nullptr) { 1853 return nullptr; 1854 } 1855 thread = java_lang_Thread::thread(carrier_thread); 1856 } else { 1857 thread = java_lang_Thread::thread(java_thread); 1858 } 1859 if (thread == nullptr) { 1860 return nullptr; 1861 } 1862 1863 class GetStackTraceClosure : public HandshakeClosure { 1864 public: 1865 const Handle _java_thread; 1866 int _depth; 1867 bool _retry_handshake; 1868 GrowableArray<Method*>* _methods; 1869 GrowableArray<int>* _bcis; 1870 1871 GetStackTraceClosure(Handle java_thread) : 1872 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false), 1873 _methods(nullptr), _bcis(nullptr) { 1874 } 1875 ~GetStackTraceClosure() { 1876 delete _methods; 1877 delete _bcis; 1878 } 1879 1880 bool read_reset_retry() { 1881 bool ret = _retry_handshake; 1882 // If we re-execute the handshake this method need to return false 1883 // when the handshake cannot be performed. (E.g. thread terminating) 1884 _retry_handshake = false; 1885 return ret; 1886 } 1887 1888 void do_thread(Thread* th) { 1889 if (!Thread::current()->is_Java_thread()) { 1890 _retry_handshake = true; 1891 return; 1892 } 1893 1894 JavaThread* thread = JavaThread::cast(th); 1895 1896 if (!thread->has_last_Java_frame()) { 1897 return; 1898 } 1899 1900 bool carrier = false; 1901 if (java_lang_VirtualThread::is_instance(_java_thread())) { 1902 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread 1903 const ContinuationEntry* ce = thread->vthread_continuation(); 1904 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) { 1905 return; // not mounted 1906 } 1907 } else { 1908 carrier = (thread->vthread_continuation() != nullptr); 1909 } 1910 1911 const int max_depth = MaxJavaStackTraceDepth; 1912 const bool skip_hidden = !ShowHiddenFrames; 1913 1914 // Pick minimum length that will cover most cases 1915 int init_length = 64; 1916 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal); 1917 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal); 1918 1919 int total_count = 0; 1920 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops 1921 !vfst.at_end() && (max_depth == 0 || max_depth != total_count); 1922 vfst.next()) { 1923 1924 if (skip_hidden && (vfst.method()->is_hidden() || 1925 vfst.method()->is_continuation_enter_intrinsic())) { 1926 continue; 1927 } 1928 1929 _methods->push(vfst.method()); 1930 _bcis->push(vfst.bci()); 1931 total_count++; 1932 } 1933 1934 _depth = total_count; 1935 } 1936 }; 1937 1938 // Handshake with target 1939 ResourceMark rm(THREAD); 1940 HandleMark hm(THREAD); 1941 GetStackTraceClosure gstc(Handle(THREAD, java_thread)); 1942 do { 1943 Handshake::execute(&gstc, &tlh, thread); 1944 } while (gstc.read_reset_retry()); 1945 1946 // Stop if no stack trace is found. 1947 if (gstc._depth == 0) { 1948 return nullptr; 1949 } 1950 1951 // Convert to StackTraceElement array 1952 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 1953 assert(k != nullptr, "must be loaded in 1.4+"); 1954 if (k->should_be_initialized()) { 1955 k->initialize(CHECK_NULL); 1956 } 1957 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL); 1958 1959 for (int i = 0; i < gstc._depth; i++) { 1960 methodHandle method(THREAD, gstc._methods->at(i)); 1961 oop element = java_lang_StackTraceElement::create(method, 1962 gstc._bcis->at(i), 1963 CHECK_NULL); 1964 trace->obj_at_put(i, element); 1965 } 1966 1967 return trace(); 1968 } 1969 1970 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1971 JavaThreadStatus status = get_thread_status(java_thread); 1972 switch (status) { 1973 case JavaThreadStatus::NEW : return "NEW"; 1974 case JavaThreadStatus::RUNNABLE : return "RUNNABLE"; 1975 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)"; 1976 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1977 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1978 case JavaThreadStatus::PARKED : return "WAITING (parking)"; 1979 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)"; 1980 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1981 case JavaThreadStatus::TERMINATED : return "TERMINATED"; 1982 default : return "UNKNOWN"; 1983 }; 1984 } 1985 int java_lang_ThreadGroup::_parent_offset; 1986 int java_lang_ThreadGroup::_name_offset; 1987 int java_lang_ThreadGroup::_maxPriority_offset; 1988 int java_lang_ThreadGroup::_daemon_offset; 1989 1990 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1991 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1992 return java_thread_group->obj_field(_parent_offset); 1993 } 1994 1995 // ("name as oop" accessor is not necessary) 1996 1997 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1998 oop name = java_thread_group->obj_field(_name_offset); 1999 // ThreadGroup.name can be null 2000 if (name != nullptr) { 2001 return java_lang_String::as_utf8_string(name); 2002 } 2003 return nullptr; 2004 } 2005 2006 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 2007 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 2008 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 2009 } 2010 2011 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 2012 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 2013 return java_thread_group->bool_field(_daemon_offset) != 0; 2014 } 2015 2016 #define THREADGROUP_FIELDS_DO(macro) \ 2017 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \ 2018 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2019 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \ 2020 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); 2021 2022 void java_lang_ThreadGroup::compute_offsets() { 2023 assert(_parent_offset == 0, "offsets should be initialized only once"); 2024 2025 InstanceKlass* k = vmClasses::ThreadGroup_klass(); 2026 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2027 } 2028 2029 #if INCLUDE_CDS 2030 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) { 2031 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2032 } 2033 #endif 2034 2035 2036 // java_lang_VirtualThread 2037 2038 int java_lang_VirtualThread::static_vthread_scope_offset; 2039 int java_lang_VirtualThread::_carrierThread_offset; 2040 int java_lang_VirtualThread::_continuation_offset; 2041 int java_lang_VirtualThread::_state_offset; 2042 2043 #define VTHREAD_FIELDS_DO(macro) \ 2044 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \ 2045 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \ 2046 macro(_continuation_offset, k, "cont", continuation_signature, false); \ 2047 macro(_state_offset, k, "state", int_signature, false) 2048 2049 2050 void java_lang_VirtualThread::compute_offsets() { 2051 InstanceKlass* k = vmClasses::VirtualThread_klass(); 2052 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2053 } 2054 2055 bool java_lang_VirtualThread::is_instance(oop obj) { 2056 return obj != nullptr && is_subclass(obj->klass()); 2057 } 2058 2059 oop java_lang_VirtualThread::carrier_thread(oop vthread) { 2060 oop thread = vthread->obj_field(_carrierThread_offset); 2061 return thread; 2062 } 2063 2064 oop java_lang_VirtualThread::continuation(oop vthread) { 2065 oop cont = vthread->obj_field(_continuation_offset); 2066 return cont; 2067 } 2068 2069 int java_lang_VirtualThread::state(oop vthread) { 2070 return vthread->int_field_acquire(_state_offset); 2071 } 2072 2073 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) { 2074 JavaThreadStatus status = JavaThreadStatus::NEW; 2075 switch (state & ~SUSPENDED) { 2076 case NEW: 2077 status = JavaThreadStatus::NEW; 2078 break; 2079 case STARTED: 2080 case RUNNING: 2081 case PARKING: 2082 case TIMED_PARKING: 2083 case UNPARKED: 2084 case YIELDING: 2085 case YIELDED: 2086 status = JavaThreadStatus::RUNNABLE; 2087 break; 2088 case PARKED: 2089 case PINNED: 2090 status = JavaThreadStatus::PARKED; 2091 break; 2092 case TIMED_PARKED: 2093 case TIMED_PINNED: 2094 status = JavaThreadStatus::PARKED_TIMED; 2095 break; 2096 case TERMINATED: 2097 status = JavaThreadStatus::TERMINATED; 2098 break; 2099 default: 2100 ShouldNotReachHere(); 2101 } 2102 return status; 2103 } 2104 2105 #if INCLUDE_CDS 2106 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) { 2107 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2108 } 2109 #endif 2110 2111 // java_lang_Throwable 2112 2113 int java_lang_Throwable::_backtrace_offset; 2114 int java_lang_Throwable::_detailMessage_offset; 2115 int java_lang_Throwable::_stackTrace_offset; 2116 int java_lang_Throwable::_depth_offset; 2117 int java_lang_Throwable::_cause_offset; 2118 int java_lang_Throwable::_static_unassigned_stacktrace_offset; 2119 2120 #define THROWABLE_FIELDS_DO(macro) \ 2121 macro(_backtrace_offset, k, "backtrace", object_signature, false); \ 2122 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \ 2123 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 2124 macro(_depth_offset, k, "depth", int_signature, false); \ 2125 macro(_cause_offset, k, "cause", throwable_signature, false); \ 2126 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 2127 2128 void java_lang_Throwable::compute_offsets() { 2129 InstanceKlass* k = vmClasses::Throwable_klass(); 2130 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2131 } 2132 2133 #if INCLUDE_CDS 2134 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) { 2135 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2136 } 2137 #endif 2138 2139 oop java_lang_Throwable::unassigned_stacktrace() { 2140 InstanceKlass* ik = vmClasses::Throwable_klass(); 2141 oop base = ik->static_field_base_raw(); 2142 return base->obj_field(_static_unassigned_stacktrace_offset); 2143 } 2144 2145 oop java_lang_Throwable::backtrace(oop throwable) { 2146 return throwable->obj_field_acquire(_backtrace_offset); 2147 } 2148 2149 2150 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 2151 throwable->release_obj_field_put(_backtrace_offset, value); 2152 } 2153 2154 int java_lang_Throwable::depth(oop throwable) { 2155 return throwable->int_field(_depth_offset); 2156 } 2157 2158 void java_lang_Throwable::set_depth(oop throwable, int value) { 2159 throwable->int_field_put(_depth_offset, value); 2160 } 2161 2162 oop java_lang_Throwable::message(oop throwable) { 2163 return throwable->obj_field(_detailMessage_offset); 2164 } 2165 2166 const char* java_lang_Throwable::message_as_utf8(oop throwable) { 2167 oop msg = java_lang_Throwable::message(throwable); 2168 const char* msg_utf8 = nullptr; 2169 if (msg != nullptr) { 2170 msg_utf8 = java_lang_String::as_utf8_string(msg); 2171 } 2172 return msg_utf8; 2173 } 2174 2175 oop java_lang_Throwable::cause(oop throwable) { 2176 return throwable->obj_field(_cause_offset); 2177 } 2178 2179 void java_lang_Throwable::set_message(oop throwable, oop value) { 2180 throwable->obj_field_put(_detailMessage_offset, value); 2181 } 2182 2183 2184 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 2185 throwable->obj_field_put(_stackTrace_offset, st_element_array); 2186 } 2187 2188 void java_lang_Throwable::clear_stacktrace(oop throwable) { 2189 set_stacktrace(throwable, nullptr); 2190 } 2191 2192 2193 void java_lang_Throwable::print(oop throwable, outputStream* st) { 2194 ResourceMark rm; 2195 Klass* k = throwable->klass(); 2196 assert(k != nullptr, "just checking"); 2197 st->print("%s", k->external_name()); 2198 oop msg = message(throwable); 2199 if (msg != nullptr) { 2200 st->print(": %s", java_lang_String::as_utf8_string(msg)); 2201 } 2202 } 2203 2204 // After this many redefines, the stack trace is unreliable. 2205 const int MAX_VERSION = USHRT_MAX; 2206 2207 static inline bool version_matches(Method* method, int version) { 2208 assert(version < MAX_VERSION, "version is too big"); 2209 return method != nullptr && (method->constants()->version() == version); 2210 } 2211 2212 // This class provides a simple wrapper over the internal structure of 2213 // exception backtrace to insulate users of the backtrace from needing 2214 // to know what it looks like. 2215 // The code of this class is not GC safe. Allocations can only happen 2216 // in expand(). 2217 class BacktraceBuilder: public StackObj { 2218 friend class BacktraceIterator; 2219 private: 2220 Handle _backtrace; 2221 objArrayOop _head; 2222 typeArrayOop _methods; 2223 typeArrayOop _bcis; 2224 objArrayOop _mirrors; 2225 typeArrayOop _names; // Needed to insulate method name against redefinition. 2226 // True if the top frame of the backtrace is omitted because it shall be hidden. 2227 bool _has_hidden_top_frame; 2228 int _index; 2229 NoSafepointVerifier _nsv; 2230 2231 enum { 2232 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 2233 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 2234 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 2235 trace_names_offset = java_lang_Throwable::trace_names_offset, 2236 trace_conts_offset = java_lang_Throwable::trace_conts_offset, 2237 trace_next_offset = java_lang_Throwable::trace_next_offset, 2238 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset, 2239 trace_size = java_lang_Throwable::trace_size, 2240 trace_chunk_size = java_lang_Throwable::trace_chunk_size 2241 }; 2242 2243 // get info out of chunks 2244 static typeArrayOop get_methods(objArrayHandle chunk) { 2245 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 2246 assert(methods != nullptr, "method array should be initialized in backtrace"); 2247 return methods; 2248 } 2249 static typeArrayOop get_bcis(objArrayHandle chunk) { 2250 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 2251 assert(bcis != nullptr, "bci array should be initialized in backtrace"); 2252 return bcis; 2253 } 2254 static objArrayOop get_mirrors(objArrayHandle chunk) { 2255 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 2256 assert(mirrors != nullptr, "mirror array should be initialized in backtrace"); 2257 return mirrors; 2258 } 2259 static typeArrayOop get_names(objArrayHandle chunk) { 2260 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 2261 assert(names != nullptr, "names array should be initialized in backtrace"); 2262 return names; 2263 } 2264 static bool has_hidden_top_frame(objArrayHandle chunk) { 2265 oop hidden = chunk->obj_at(trace_hidden_offset); 2266 return hidden != nullptr; 2267 } 2268 2269 public: 2270 2271 // constructor for new backtrace 2272 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) { 2273 expand(CHECK); 2274 _backtrace = Handle(THREAD, _head); 2275 _index = 0; 2276 } 2277 2278 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 2279 _methods = get_methods(backtrace); 2280 _bcis = get_bcis(backtrace); 2281 _mirrors = get_mirrors(backtrace); 2282 _names = get_names(backtrace); 2283 _has_hidden_top_frame = has_hidden_top_frame(backtrace); 2284 assert(_methods->length() == _bcis->length() && 2285 _methods->length() == _mirrors->length() && 2286 _mirrors->length() == _names->length(), 2287 "method and source information arrays should match"); 2288 2289 // head is the preallocated backtrace 2290 _head = backtrace(); 2291 _backtrace = Handle(thread, _head); 2292 _index = 0; 2293 } 2294 2295 void expand(TRAPS) { 2296 objArrayHandle old_head(THREAD, _head); 2297 PauseNoSafepointVerifier pnsv(&_nsv); 2298 2299 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2300 objArrayHandle new_head(THREAD, head); 2301 2302 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2303 typeArrayHandle new_methods(THREAD, methods); 2304 2305 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2306 typeArrayHandle new_bcis(THREAD, bcis); 2307 2308 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2309 objArrayHandle new_mirrors(THREAD, mirrors); 2310 2311 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2312 typeArrayHandle new_names(THREAD, names); 2313 2314 if (!old_head.is_null()) { 2315 old_head->obj_at_put(trace_next_offset, new_head()); 2316 } 2317 new_head->obj_at_put(trace_methods_offset, new_methods()); 2318 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2319 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2320 new_head->obj_at_put(trace_names_offset, new_names()); 2321 new_head->obj_at_put(trace_hidden_offset, nullptr); 2322 2323 _head = new_head(); 2324 _methods = new_methods(); 2325 _bcis = new_bcis(); 2326 _mirrors = new_mirrors(); 2327 _names = new_names(); 2328 _index = 0; 2329 } 2330 2331 oop backtrace() { 2332 return _backtrace(); 2333 } 2334 2335 inline void push(Method* method, int bci, TRAPS) { 2336 // Smear the -1 bci to 0 since the array only holds unsigned 2337 // shorts. The later line number lookup would just smear the -1 2338 // to a 0 even if it could be recorded. 2339 if (bci == SynchronizationEntryBCI) bci = 0; 2340 2341 if (_index >= trace_chunk_size) { 2342 methodHandle mhandle(THREAD, method); 2343 expand(CHECK); 2344 method = mhandle(); 2345 } 2346 2347 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2348 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2349 2350 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2351 // klass owning the symbols alive so their refcounts aren't decremented. 2352 Symbol* name = method->name(); 2353 _names->symbol_at_put(_index, name); 2354 2355 // We need to save the mirrors in the backtrace to keep the class 2356 // from being unloaded while we still have this stack trace. 2357 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror"); 2358 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2359 2360 _index++; 2361 } 2362 2363 void set_has_hidden_top_frame() { 2364 if (!_has_hidden_top_frame) { 2365 // It would be nice to add java/lang/Boolean::TRUE here 2366 // to indicate that this backtrace has a hidden top frame. 2367 // But this code is used before TRUE is allocated. 2368 // Therefore let's just use an arbitrary legal oop 2369 // available right here. _methods is a short[]. 2370 assert(_methods != nullptr, "we need a legal oop"); 2371 _has_hidden_top_frame = true; 2372 _head->obj_at_put(trace_hidden_offset, _methods); 2373 } 2374 } 2375 }; 2376 2377 struct BacktraceElement : public StackObj { 2378 int _method_id; 2379 int _bci; 2380 int _version; 2381 Symbol* _name; 2382 Handle _mirror; 2383 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2384 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {} 2385 }; 2386 2387 class BacktraceIterator : public StackObj { 2388 int _index; 2389 objArrayHandle _result; 2390 objArrayHandle _mirrors; 2391 typeArrayHandle _methods; 2392 typeArrayHandle _bcis; 2393 typeArrayHandle _names; 2394 2395 void init(objArrayHandle result, Thread* thread) { 2396 // Get method id, bci, version and mirror from chunk 2397 _result = result; 2398 if (_result.not_null()) { 2399 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2400 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2401 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2402 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2403 _index = 0; 2404 } 2405 } 2406 public: 2407 BacktraceIterator(objArrayHandle result, Thread* thread) { 2408 init(result, thread); 2409 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2410 } 2411 2412 BacktraceElement next(Thread* thread) { 2413 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2414 _methods->ushort_at(_index), 2415 Backtrace::version_at(_bcis->int_at(_index)), 2416 Backtrace::bci_at(_bcis->int_at(_index)), 2417 _names->symbol_at(_index)); 2418 _index++; 2419 2420 if (_index >= java_lang_Throwable::trace_chunk_size) { 2421 int next_offset = java_lang_Throwable::trace_next_offset; 2422 // Get next chunk 2423 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2424 init(result, thread); 2425 } 2426 return e; 2427 } 2428 2429 bool repeat() { 2430 return _result.not_null() && _mirrors->obj_at(_index) != nullptr; 2431 } 2432 }; 2433 2434 2435 // Print stack trace element to resource allocated buffer 2436 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 2437 int version, int bci, Symbol* name) { 2438 ResourceMark rm; 2439 2440 // Get strings and string lengths 2441 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2442 const char* klass_name = holder->external_name(); 2443 int buf_len = (int)strlen(klass_name); 2444 2445 char* method_name = name->as_C_string(); 2446 buf_len += (int)strlen(method_name); 2447 2448 char* source_file_name = nullptr; 2449 Symbol* source = Backtrace::get_source_file_name(holder, version); 2450 if (source != nullptr) { 2451 source_file_name = source->as_C_string(); 2452 buf_len += (int)strlen(source_file_name); 2453 } 2454 2455 char *module_name = nullptr, *module_version = nullptr; 2456 ModuleEntry* module = holder->module(); 2457 if (module->is_named()) { 2458 module_name = module->name()->as_C_string(); 2459 buf_len += (int)strlen(module_name); 2460 if (module->version() != nullptr) { 2461 module_version = module->version()->as_C_string(); 2462 buf_len += (int)strlen(module_version); 2463 } 2464 } 2465 2466 // Allocate temporary buffer with extra space for formatting and line number 2467 const size_t buf_size = buf_len + 64; 2468 char* buf = NEW_RESOURCE_ARRAY(char, buf_size); 2469 2470 // Print stack trace line in buffer 2471 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name); 2472 2473 // Print module information 2474 if (module_name != nullptr) { 2475 if (module_version != nullptr) { 2476 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version); 2477 } else { 2478 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name); 2479 } 2480 } 2481 2482 // The method can be null if the requested class version is gone 2483 Method* method = holder->method_with_orig_idnum(method_id, version); 2484 if (!version_matches(method, version)) { 2485 strcat(buf, "Redefined)"); 2486 } else { 2487 int line_number = Backtrace::get_line_number(method, bci); 2488 if (line_number == -2) { 2489 strcat(buf, "Native Method)"); 2490 } else { 2491 if (source_file_name != nullptr && (line_number != -1)) { 2492 // Sourcename and linenumber 2493 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number); 2494 } else if (source_file_name != nullptr) { 2495 // Just sourcename 2496 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name); 2497 } else { 2498 // Neither sourcename nor linenumber 2499 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)"); 2500 } 2501 nmethod* nm = method->code(); 2502 if (WizardMode && nm != nullptr) { 2503 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 2504 } 2505 } 2506 } 2507 2508 st->print_cr("%s", buf); 2509 } 2510 2511 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) { 2512 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 2513 int method_id = method->orig_method_idnum(); 2514 int version = method->constants()->version(); 2515 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 2516 } 2517 2518 /** 2519 * Print the throwable message and its stack trace plus all causes by walking the 2520 * cause chain. The output looks the same as of Throwable.printStackTrace(). 2521 */ 2522 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 2523 // First, print the message. 2524 print(throwable(), st); 2525 st->cr(); 2526 2527 // Now print the stack trace. 2528 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2529 while (throwable.not_null()) { 2530 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 2531 if (result.is_null()) { 2532 st->print_raw_cr("\t<<no stack trace available>>"); 2533 return; 2534 } 2535 BacktraceIterator iter(result, THREAD); 2536 2537 while (iter.repeat()) { 2538 BacktraceElement bte = iter.next(THREAD); 2539 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 2540 } 2541 if (THREAD->can_call_java()) { 2542 // Call getCause() which doesn't necessarily return the _cause field. 2543 ExceptionMark em(THREAD); 2544 JavaValue cause(T_OBJECT); 2545 JavaCalls::call_virtual(&cause, 2546 throwable, 2547 throwable->klass(), 2548 vmSymbols::getCause_name(), 2549 vmSymbols::void_throwable_signature(), 2550 THREAD); 2551 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 2552 if (HAS_PENDING_EXCEPTION) { 2553 CLEAR_PENDING_EXCEPTION; 2554 throwable = Handle(); 2555 } else { 2556 throwable = Handle(THREAD, cause.get_oop()); 2557 if (throwable.not_null()) { 2558 st->print("Caused by: "); 2559 print(throwable(), st); 2560 st->cr(); 2561 } 2562 } 2563 } else { 2564 st->print_raw_cr("<<cannot call Java to get cause>>"); 2565 return; 2566 } 2567 } 2568 } 2569 2570 /** 2571 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 2572 */ 2573 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 2574 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected"); 2575 JavaValue result(T_VOID); 2576 JavaCalls::call_virtual(&result, 2577 throwable, 2578 vmClasses::Throwable_klass(), 2579 vmSymbols::printStackTrace_name(), 2580 vmSymbols::void_method_signature(), 2581 THREAD); 2582 } 2583 2584 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 2585 if (!StackTraceInThrowable) return; 2586 ResourceMark rm(THREAD); 2587 2588 // Start out by clearing the backtrace for this object, in case the VM 2589 // runs out of memory while allocating the stack trace 2590 set_backtrace(throwable(), nullptr); 2591 // Clear lazily constructed Java level stacktrace if refilling occurs 2592 // This is unnecessary in 1.7+ but harmless 2593 clear_stacktrace(throwable()); 2594 2595 int max_depth = MaxJavaStackTraceDepth; 2596 JavaThread* thread = THREAD; 2597 2598 BacktraceBuilder bt(CHECK); 2599 2600 // If there is no Java frame just return the method that was being called 2601 // with bci 0 2602 if (!thread->has_last_Java_frame()) { 2603 if (max_depth >= 1 && method() != nullptr) { 2604 bt.push(method(), 0, CHECK); 2605 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 2606 set_depth(throwable(), 1); 2607 set_backtrace(throwable(), bt.backtrace()); 2608 } 2609 return; 2610 } 2611 2612 // Instead of using vframe directly, this version of fill_in_stack_trace 2613 // basically handles everything by hand. This significantly improved the 2614 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 2615 // See bug 6333838 for more details. 2616 // The "ASSERT" here is to verify this method generates the exactly same stack 2617 // trace as utilizing vframe. 2618 #ifdef ASSERT 2619 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */); 2620 #endif 2621 int total_count = 0; 2622 RegisterMap map(thread, 2623 RegisterMap::UpdateMap::skip, 2624 RegisterMap::ProcessFrames::skip, 2625 RegisterMap::WalkContinuation::include); 2626 int decode_offset = 0; 2627 nmethod* nm = nullptr; 2628 bool skip_fillInStackTrace_check = false; 2629 bool skip_throwableInit_check = false; 2630 bool skip_hidden = !ShowHiddenFrames; 2631 bool show_carrier = ShowCarrierFrames; 2632 ContinuationEntry* cont_entry = thread->last_continuation(); 2633 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 2634 Method* method = nullptr; 2635 int bci = 0; 2636 2637 // Compiled java method case. 2638 if (decode_offset != 0) { 2639 DebugInfoReadStream stream(nm, decode_offset); 2640 decode_offset = stream.read_int(); 2641 method = (Method*)nm->metadata_at(stream.read_int()); 2642 bci = stream.read_bci(); 2643 } else { 2644 if (fr.is_first_frame()) break; 2645 2646 if (Continuation::is_continuation_enterSpecial(fr)) { 2647 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), ""); 2648 if (!show_carrier && cont_entry->is_virtual_thread()) { 2649 break; 2650 } 2651 cont_entry = cont_entry->parent(); 2652 } 2653 2654 address pc = fr.pc(); 2655 if (fr.is_interpreted_frame()) { 2656 address bcp; 2657 if (!map.in_cont()) { 2658 bcp = fr.interpreter_frame_bcp(); 2659 method = fr.interpreter_frame_method(); 2660 } else { 2661 bcp = map.stack_chunk()->interpreter_frame_bcp(fr); 2662 method = map.stack_chunk()->interpreter_frame_method(fr); 2663 } 2664 bci = method->bci_from(bcp); 2665 fr = fr.sender(&map); 2666 } else { 2667 CodeBlob* cb = fr.cb(); 2668 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null 2669 // but non nmethod 2670 fr = fr.sender(&map); 2671 if (cb == nullptr || !cb->is_nmethod()) { 2672 continue; 2673 } 2674 nm = cb->as_nmethod(); 2675 assert(nm->method() != nullptr, "must be"); 2676 if (nm->method()->is_native()) { 2677 method = nm->method(); 2678 bci = 0; 2679 } else { 2680 PcDesc* pd = nm->pc_desc_at(pc); 2681 decode_offset = pd->scope_decode_offset(); 2682 // if decode_offset is not equal to 0, it will execute the 2683 // "compiled java method case" at the beginning of the loop. 2684 continue; 2685 } 2686 } 2687 } 2688 #ifdef ASSERT 2689 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace 2690 assert(st.method() == method && st.bci() == bci, "Wrong stack trace"); 2691 st.next(); 2692 } 2693 #endif 2694 2695 // the format of the stacktrace will be: 2696 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2697 // - 0 or more <init> methods for the exception class (skipped) 2698 // - rest of the stack 2699 2700 if (!skip_fillInStackTrace_check) { 2701 if (method->name() == vmSymbols::fillInStackTrace_name() && 2702 throwable->is_a(method->method_holder())) { 2703 continue; 2704 } 2705 else { 2706 skip_fillInStackTrace_check = true; // gone past them all 2707 } 2708 } 2709 if (!skip_throwableInit_check) { 2710 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2711 2712 // skip <init> methods of the exception class and superclasses 2713 // This is similar to classic VM. 2714 if (method->is_object_constructor() && 2715 throwable->is_a(method->method_holder())) { 2716 continue; 2717 } else { 2718 // there are none or we've seen them all - either way stop checking 2719 skip_throwableInit_check = true; 2720 } 2721 } 2722 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) { 2723 if (skip_hidden) { 2724 if (total_count == 0) { 2725 // The top frame will be hidden from the stack trace. 2726 bt.set_has_hidden_top_frame(); 2727 } 2728 continue; 2729 } 2730 } 2731 2732 bt.push(method, bci, CHECK); 2733 total_count++; 2734 } 2735 2736 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2737 2738 // Put completed stack trace into throwable object 2739 set_backtrace(throwable(), bt.backtrace()); 2740 set_depth(throwable(), total_count); 2741 } 2742 2743 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2744 // No-op if stack trace is disabled 2745 if (!StackTraceInThrowable) { 2746 return; 2747 } 2748 2749 // Disable stack traces for some preallocated out of memory errors 2750 if (!Universe::should_fill_in_stack_trace(throwable)) { 2751 return; 2752 } 2753 2754 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2755 PreserveExceptionMark pm(THREAD); 2756 2757 fill_in_stack_trace(throwable, method, THREAD); 2758 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the 2759 // original exception via the PreserveExceptionMark destructor. 2760 CLEAR_PENDING_EXCEPTION; 2761 } 2762 2763 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2764 // Allocate stack trace - backtrace is created but not filled in 2765 2766 // No-op if stack trace is disabled 2767 if (!StackTraceInThrowable) return; 2768 BacktraceBuilder bt(CHECK); // creates a backtrace 2769 set_backtrace(throwable(), bt.backtrace()); 2770 } 2771 2772 2773 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2774 // Fill in stack trace into preallocated backtrace (no GC) 2775 2776 // No-op if stack trace is disabled 2777 if (!StackTraceInThrowable) return; 2778 2779 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check"); 2780 2781 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2782 2783 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2784 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2785 2786 ResourceMark rm(THREAD); 2787 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */); 2788 2789 BacktraceBuilder bt(THREAD, backtrace); 2790 2791 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2792 // methods as preallocated errors aren't created by "java" code. 2793 2794 // fill in as much stack trace as possible 2795 int chunk_count = 0; 2796 for (;!st.at_end(); st.next()) { 2797 bt.push(st.method(), st.bci(), CHECK); 2798 chunk_count++; 2799 2800 // Bail-out for deep stacks 2801 if (chunk_count >= trace_chunk_size) break; 2802 } 2803 set_depth(throwable(), chunk_count); 2804 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2805 2806 // We support the Throwable immutability protocol defined for Java 7. 2807 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2808 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized"); 2809 } 2810 2811 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace, 2812 objArrayHandle stack_trace_array_h, TRAPS) { 2813 2814 if (backtrace.is_null() || stack_trace_array_h.is_null()) { 2815 THROW(vmSymbols::java_lang_NullPointerException()); 2816 } 2817 2818 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2819 2820 if (stack_trace_array_h->length() != depth) { 2821 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2822 } 2823 2824 objArrayHandle result(THREAD, objArrayOop(backtrace())); 2825 BacktraceIterator iter(result, THREAD); 2826 2827 int index = 0; 2828 while (iter.repeat()) { 2829 BacktraceElement bte = iter.next(THREAD); 2830 2831 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2832 2833 if (stack_trace_element.is_null()) { 2834 THROW(vmSymbols::java_lang_NullPointerException()); 2835 } 2836 2837 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2838 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2839 2840 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2841 method, 2842 bte._version, 2843 bte._bci, 2844 bte._name, 2845 CHECK); 2846 } 2847 } 2848 2849 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) { 2850 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization 2851 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive 2852 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and 2853 // symbolic stacktrace of 'throwable'. 2854 assert(throwable.not_null(), "shouldn't be"); 2855 2856 // Now create the message from the original exception and thread name. 2857 ResourceMark rm(current); 2858 const char *message = nullptr; 2859 oop detailed_message = java_lang_Throwable::message(throwable()); 2860 if (detailed_message != nullptr) { 2861 message = java_lang_String::as_utf8_string(detailed_message); 2862 } 2863 stringStream st; 2864 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(), 2865 message == nullptr ? "" : ":"); 2866 if (message == nullptr) { 2867 st.print("[in thread \"%s\"]", current->name()); 2868 } else { 2869 st.print("%s [in thread \"%s\"]", message, current->name()); 2870 } 2871 2872 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError(); 2873 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string()); 2874 // If new_exception returns a different exception while creating the exception, 2875 // abandon the attempt to save the initialization error and return null. 2876 if (init_error->klass()->name() != exception_name) { 2877 log_info(class, init)("Exception %s thrown while saving initialization exception", 2878 init_error->klass()->external_name()); 2879 return Handle(); 2880 } 2881 2882 // Call to java to fill in the stack trace and clear declaringClassObject to 2883 // not keep classes alive in the stack trace. 2884 // call this: public StackTraceElement[] getStackTrace() 2885 JavaValue result(T_ARRAY); 2886 JavaCalls::call_virtual(&result, throwable, 2887 vmClasses::Throwable_klass(), 2888 vmSymbols::getStackTrace_name(), 2889 vmSymbols::getStackTrace_signature(), 2890 current); 2891 if (!current->has_pending_exception()){ 2892 Handle stack_trace(current, result.get_oop()); 2893 assert(stack_trace->is_objArray(), "Should be an array"); 2894 java_lang_Throwable::set_stacktrace(init_error(), stack_trace()); 2895 // Clear backtrace because the stacktrace should be used instead. 2896 set_backtrace(init_error(), nullptr); 2897 } else { 2898 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s", 2899 init_error->klass()->external_name()); 2900 current->clear_pending_exception(); 2901 } 2902 2903 return init_error; 2904 } 2905 2906 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) { 2907 JavaThread* current = JavaThread::current(); 2908 objArrayHandle result(current, objArrayOop(backtrace(throwable))); 2909 BacktraceIterator iter(result, current); 2910 // No backtrace available. 2911 if (!iter.repeat()) return false; 2912 2913 // If the exception happened in a frame that has been hidden, i.e., 2914 // omitted from the back trace, we can not compute the message. 2915 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset); 2916 if (hidden != nullptr) { 2917 return false; 2918 } 2919 2920 // Get first backtrace element. 2921 BacktraceElement bte = iter.next(current); 2922 2923 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2924 assert(holder != nullptr, "first element should be non-null"); 2925 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version); 2926 2927 // Original version is no longer available. 2928 if (m == nullptr || !version_matches(m, bte._version)) { 2929 return false; 2930 } 2931 2932 *method = m; 2933 *bci = bte._bci; 2934 return true; 2935 } 2936 2937 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2938 // Allocate java.lang.StackTraceElement instance 2939 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 2940 assert(k != nullptr, "must be loaded in 1.4+"); 2941 if (k->should_be_initialized()) { 2942 k->initialize(CHECK_NULL); 2943 } 2944 2945 Handle element = k->allocate_instance_handle(CHECK_NULL); 2946 2947 int version = method->constants()->version(); 2948 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL); 2949 return element(); 2950 } 2951 2952 void java_lang_StackTraceElement::fill_in(Handle element, 2953 InstanceKlass* holder, const methodHandle& method, 2954 int version, int bci, Symbol* name, TRAPS) { 2955 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check"); 2956 2957 ResourceMark rm(THREAD); 2958 HandleMark hm(THREAD); 2959 2960 // Fill in class name 2961 Handle java_class(THREAD, holder->java_mirror()); 2962 oop classname = java_lang_Class::name(java_class, CHECK); 2963 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2964 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class()); 2965 2966 oop loader = holder->class_loader(); 2967 if (loader != nullptr) { 2968 oop loader_name = java_lang_ClassLoader::name(loader); 2969 if (loader_name != nullptr) 2970 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2971 } 2972 2973 // Fill in method name 2974 oop methodname = StringTable::intern(name, CHECK); 2975 java_lang_StackTraceElement::set_methodName(element(), methodname); 2976 2977 // Fill in module name and version 2978 ModuleEntry* module = holder->module(); 2979 if (module->is_named()) { 2980 oop module_name = StringTable::intern(module->name(), CHECK); 2981 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2982 oop module_version; 2983 if (module->version() != nullptr) { 2984 module_version = StringTable::intern(module->version(), CHECK); 2985 } else { 2986 module_version = nullptr; 2987 } 2988 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2989 } 2990 2991 if (method() == nullptr || !version_matches(method(), version)) { 2992 // The method was redefined, accurate line number information isn't available 2993 java_lang_StackTraceElement::set_fileName(element(), nullptr); 2994 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2995 } else { 2996 Symbol* source; 2997 oop source_file; 2998 int line_number; 2999 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK); 3000 3001 java_lang_StackTraceElement::set_fileName(element(), source_file); 3002 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 3003 } 3004 } 3005 3006 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class, 3007 InstanceKlass* holder, 3008 int version, 3009 const methodHandle& method, 3010 int bci, 3011 Symbol*& source, 3012 oop& source_file, 3013 int& line_number, TRAPS) { 3014 // Fill in source file name and line number. 3015 source = Backtrace::get_source_file_name(holder, version); 3016 source_file = java_lang_Class::source_file(java_class()); 3017 if (source != nullptr) { 3018 // Class was not redefined. We can trust its cache if set, 3019 // else we have to initialize it. 3020 if (source_file == nullptr) { 3021 source_file = StringTable::intern(source, CHECK); 3022 java_lang_Class::set_source_file(java_class(), source_file); 3023 } 3024 } else { 3025 // Class was redefined. Dump the cache if it was set. 3026 if (source_file != nullptr) { 3027 source_file = nullptr; 3028 java_lang_Class::set_source_file(java_class(), source_file); 3029 } 3030 } 3031 line_number = Backtrace::get_line_number(method(), bci); 3032 } 3033 3034 #if INCLUDE_JVMCI 3035 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci, 3036 Symbol*& filename, int& line_number, TRAPS) { 3037 ResourceMark rm(THREAD); 3038 HandleMark hm(THREAD); 3039 3040 filename = nullptr; 3041 line_number = -1; 3042 3043 oop source_file; 3044 int version = method->constants()->version(); 3045 InstanceKlass* holder = method->method_holder(); 3046 Handle java_class(THREAD, holder->java_mirror()); 3047 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK); 3048 } 3049 #endif // INCLUDE_JVMCI 3050 3051 // java_lang_ClassFrameInfo 3052 3053 int java_lang_ClassFrameInfo::_classOrMemberName_offset; 3054 int java_lang_ClassFrameInfo::_flags_offset; 3055 3056 #define CLASSFRAMEINFO_FIELDS_DO(macro) \ 3057 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \ 3058 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false) 3059 3060 void java_lang_ClassFrameInfo::compute_offsets() { 3061 InstanceKlass* k = vmClasses::ClassFrameInfo_klass(); 3062 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3063 } 3064 3065 #if INCLUDE_CDS 3066 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) { 3067 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3068 } 3069 #endif 3070 3071 static int get_flags(const methodHandle& m) { 3072 int flags = (jushort)( m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS ); 3073 if (m->is_object_constructor()) { 3074 flags |= java_lang_invoke_MemberName::MN_IS_OBJECT_CONSTRUCTOR; 3075 } else { 3076 flags |= java_lang_invoke_MemberName::MN_IS_METHOD; 3077 } 3078 if (m->caller_sensitive()) { 3079 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE; 3080 } 3081 if (m->is_hidden()) { 3082 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER; 3083 } 3084 assert((flags & 0xFF000000) == 0, "unexpected flags"); 3085 return flags; 3086 } 3087 3088 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) { 3089 return obj->obj_field(_classOrMemberName_offset); 3090 } 3091 3092 int java_lang_ClassFrameInfo::flags(oop obj) { 3093 return obj->int_field(_flags_offset); 3094 } 3095 3096 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) { 3097 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror()); 3098 // flags is initialized when ClassFrameInfo object is constructed and retain the value 3099 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m); 3100 stackFrame->int_field_put(_flags_offset, flags); 3101 } 3102 3103 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) { 3104 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK); 3105 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name); 3106 // flags is initialized when ClassFrameInfo object is constructed and retain the value 3107 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m); 3108 stackFrame->int_field_put(_flags_offset, flags); 3109 } 3110 3111 3112 // java_lang_StackFrameInfo 3113 3114 int java_lang_StackFrameInfo::_type_offset; 3115 int java_lang_StackFrameInfo::_name_offset; 3116 int java_lang_StackFrameInfo::_bci_offset; 3117 int java_lang_StackFrameInfo::_version_offset; 3118 int java_lang_StackFrameInfo::_contScope_offset; 3119 3120 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 3121 macro(_type_offset, k, "type", object_signature, false); \ 3122 macro(_name_offset, k, "name", string_signature, false); \ 3123 macro(_bci_offset, k, "bci", int_signature, false); \ 3124 macro(_contScope_offset, k, "contScope", continuationscope_signature, false) 3125 3126 void java_lang_StackFrameInfo::compute_offsets() { 3127 InstanceKlass* k = vmClasses::StackFrameInfo_klass(); 3128 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3129 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3130 } 3131 3132 #if INCLUDE_CDS 3133 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) { 3134 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3135 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3136 } 3137 #endif 3138 3139 Method* java_lang_StackFrameInfo::get_method(oop obj) { 3140 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj); 3141 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m); 3142 return method; 3143 } 3144 3145 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) { 3146 // set Method* or mid/cpref 3147 HandleMark hm(THREAD); 3148 Handle cont_h(THREAD, cont); 3149 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK); 3150 3151 // set bci 3152 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 3153 // method may be redefined; store the version 3154 int version = method->constants()->version(); 3155 assert((jushort)version == version, "version should be short"); 3156 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 3157 3158 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr; 3159 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope); 3160 } 3161 3162 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 3163 ResourceMark rm(THREAD); 3164 HandleMark hm(THREAD); 3165 3166 Method* method = java_lang_StackFrameInfo::get_method(stackFrame()); 3167 InstanceKlass* holder = method->method_holder(); 3168 short version = stackFrame->short_field(_version_offset); 3169 int bci = stackFrame->int_field(_bci_offset); 3170 Symbol* name = method->name(); 3171 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK); 3172 } 3173 3174 oop java_lang_StackFrameInfo::type(oop obj) { 3175 return obj->obj_field(_type_offset); 3176 } 3177 3178 void java_lang_StackFrameInfo::set_type(oop obj, oop value) { 3179 obj->obj_field_put(_type_offset, value); 3180 } 3181 3182 oop java_lang_StackFrameInfo::name(oop obj) { 3183 return obj->obj_field(_name_offset); 3184 } 3185 3186 void java_lang_StackFrameInfo::set_name(oop obj, oop value) { 3187 obj->obj_field_put(_name_offset, value); 3188 } 3189 3190 void java_lang_StackFrameInfo::set_version(oop obj, short value) { 3191 obj->short_field_put(_version_offset, value); 3192 } 3193 3194 void java_lang_StackFrameInfo::set_bci(oop obj, int value) { 3195 assert(value >= 0 && value < max_jushort, "must be a valid bci value"); 3196 obj->int_field_put(_bci_offset, value); 3197 } 3198 3199 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) { 3200 obj->obj_field_put(_contScope_offset, value); 3201 } 3202 3203 int java_lang_LiveStackFrameInfo::_monitors_offset; 3204 int java_lang_LiveStackFrameInfo::_locals_offset; 3205 int java_lang_LiveStackFrameInfo::_operands_offset; 3206 int java_lang_LiveStackFrameInfo::_mode_offset; 3207 3208 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 3209 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 3210 macro(_locals_offset, k, "locals", object_array_signature, false); \ 3211 macro(_operands_offset, k, "operands", object_array_signature, false); \ 3212 macro(_mode_offset, k, "mode", int_signature, false) 3213 3214 void java_lang_LiveStackFrameInfo::compute_offsets() { 3215 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass(); 3216 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3217 } 3218 3219 #if INCLUDE_CDS 3220 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) { 3221 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3222 } 3223 #endif 3224 3225 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) { 3226 obj->obj_field_put(_monitors_offset, value); 3227 } 3228 3229 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) { 3230 obj->obj_field_put(_locals_offset, value); 3231 } 3232 3233 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) { 3234 obj->obj_field_put(_operands_offset, value); 3235 } 3236 3237 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) { 3238 obj->int_field_put(_mode_offset, value); 3239 } 3240 3241 3242 // java_lang_AccessibleObject 3243 3244 int java_lang_reflect_AccessibleObject::_override_offset; 3245 3246 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 3247 macro(_override_offset, k, "override", bool_signature, false) 3248 3249 void java_lang_reflect_AccessibleObject::compute_offsets() { 3250 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass(); 3251 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3252 } 3253 3254 #if INCLUDE_CDS 3255 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) { 3256 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3257 } 3258 #endif 3259 3260 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 3261 return (jboolean) reflect->bool_field(_override_offset); 3262 } 3263 3264 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 3265 reflect->bool_field_put(_override_offset, (int) value); 3266 } 3267 3268 // java_lang_reflect_Method 3269 3270 int java_lang_reflect_Method::_clazz_offset; 3271 int java_lang_reflect_Method::_name_offset; 3272 int java_lang_reflect_Method::_returnType_offset; 3273 int java_lang_reflect_Method::_parameterTypes_offset; 3274 int java_lang_reflect_Method::_exceptionTypes_offset; 3275 int java_lang_reflect_Method::_slot_offset; 3276 int java_lang_reflect_Method::_modifiers_offset; 3277 int java_lang_reflect_Method::_signature_offset; 3278 int java_lang_reflect_Method::_annotations_offset; 3279 int java_lang_reflect_Method::_parameter_annotations_offset; 3280 int java_lang_reflect_Method::_annotation_default_offset; 3281 3282 #define METHOD_FIELDS_DO(macro) \ 3283 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3284 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3285 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 3286 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 3287 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 3288 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3289 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3290 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3291 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 3292 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \ 3293 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false); 3294 3295 void java_lang_reflect_Method::compute_offsets() { 3296 InstanceKlass* k = vmClasses::reflect_Method_klass(); 3297 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3298 } 3299 3300 #if INCLUDE_CDS 3301 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) { 3302 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3303 } 3304 #endif 3305 3306 Handle java_lang_reflect_Method::create(TRAPS) { 3307 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3308 Klass* klass = vmClasses::reflect_Method_klass(); 3309 // This class is eagerly initialized during VM initialization, since we keep a reference 3310 // to one of the methods 3311 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 3312 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 3313 } 3314 3315 oop java_lang_reflect_Method::clazz(oop reflect) { 3316 return reflect->obj_field(_clazz_offset); 3317 } 3318 3319 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 3320 reflect->obj_field_put(_clazz_offset, value); 3321 } 3322 3323 int java_lang_reflect_Method::slot(oop reflect) { 3324 return reflect->int_field(_slot_offset); 3325 } 3326 3327 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 3328 reflect->int_field_put(_slot_offset, value); 3329 } 3330 3331 void java_lang_reflect_Method::set_name(oop method, oop value) { 3332 method->obj_field_put(_name_offset, value); 3333 } 3334 3335 oop java_lang_reflect_Method::return_type(oop method) { 3336 return method->obj_field(_returnType_offset); 3337 } 3338 3339 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 3340 method->obj_field_put(_returnType_offset, value); 3341 } 3342 3343 oop java_lang_reflect_Method::parameter_types(oop method) { 3344 return method->obj_field(_parameterTypes_offset); 3345 } 3346 3347 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 3348 method->obj_field_put(_parameterTypes_offset, value); 3349 } 3350 3351 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 3352 method->obj_field_put(_exceptionTypes_offset, value); 3353 } 3354 3355 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 3356 method->int_field_put(_modifiers_offset, value); 3357 } 3358 3359 void java_lang_reflect_Method::set_signature(oop method, oop value) { 3360 method->obj_field_put(_signature_offset, value); 3361 } 3362 3363 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 3364 method->obj_field_put(_annotations_offset, value); 3365 } 3366 3367 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 3368 method->obj_field_put(_parameter_annotations_offset, value); 3369 } 3370 3371 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 3372 method->obj_field_put(_annotation_default_offset, value); 3373 } 3374 3375 int java_lang_reflect_Constructor::_clazz_offset; 3376 int java_lang_reflect_Constructor::_parameterTypes_offset; 3377 int java_lang_reflect_Constructor::_exceptionTypes_offset; 3378 int java_lang_reflect_Constructor::_slot_offset; 3379 int java_lang_reflect_Constructor::_modifiers_offset; 3380 int java_lang_reflect_Constructor::_signature_offset; 3381 int java_lang_reflect_Constructor::_annotations_offset; 3382 int java_lang_reflect_Constructor::_parameter_annotations_offset; 3383 3384 #define CONSTRUCTOR_FIELDS_DO(macro) \ 3385 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3386 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 3387 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 3388 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3389 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3390 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3391 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 3392 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); 3393 3394 void java_lang_reflect_Constructor::compute_offsets() { 3395 InstanceKlass* k = vmClasses::reflect_Constructor_klass(); 3396 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3397 } 3398 3399 #if INCLUDE_CDS 3400 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) { 3401 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3402 } 3403 #endif 3404 3405 Handle java_lang_reflect_Constructor::create(TRAPS) { 3406 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3407 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 3408 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3409 InstanceKlass* ik = InstanceKlass::cast(k); 3410 // Ensure it is initialized 3411 ik->initialize(CHECK_NH); 3412 return ik->allocate_instance_handle(THREAD); 3413 } 3414 3415 oop java_lang_reflect_Constructor::clazz(oop reflect) { 3416 return reflect->obj_field(_clazz_offset); 3417 } 3418 3419 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 3420 reflect->obj_field_put(_clazz_offset, value); 3421 } 3422 3423 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 3424 return constructor->obj_field(_parameterTypes_offset); 3425 } 3426 3427 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 3428 constructor->obj_field_put(_parameterTypes_offset, value); 3429 } 3430 3431 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 3432 constructor->obj_field_put(_exceptionTypes_offset, value); 3433 } 3434 3435 int java_lang_reflect_Constructor::slot(oop reflect) { 3436 return reflect->int_field(_slot_offset); 3437 } 3438 3439 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 3440 reflect->int_field_put(_slot_offset, value); 3441 } 3442 3443 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 3444 constructor->int_field_put(_modifiers_offset, value); 3445 } 3446 3447 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 3448 constructor->obj_field_put(_signature_offset, value); 3449 } 3450 3451 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 3452 constructor->obj_field_put(_annotations_offset, value); 3453 } 3454 3455 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 3456 method->obj_field_put(_parameter_annotations_offset, value); 3457 } 3458 3459 int java_lang_reflect_Field::_clazz_offset; 3460 int java_lang_reflect_Field::_name_offset; 3461 int java_lang_reflect_Field::_type_offset; 3462 int java_lang_reflect_Field::_slot_offset; 3463 int java_lang_reflect_Field::_modifiers_offset; 3464 int java_lang_reflect_Field::_flags_offset; 3465 int java_lang_reflect_Field::_signature_offset; 3466 int java_lang_reflect_Field::_annotations_offset; 3467 3468 #define FIELD_FIELDS_DO(macro) \ 3469 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3470 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3471 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \ 3472 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3473 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3474 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 3475 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3476 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); 3477 3478 void java_lang_reflect_Field::compute_offsets() { 3479 InstanceKlass* k = vmClasses::reflect_Field_klass(); 3480 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3481 } 3482 3483 #if INCLUDE_CDS 3484 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) { 3485 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3486 } 3487 #endif 3488 3489 Handle java_lang_reflect_Field::create(TRAPS) { 3490 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3491 Symbol* name = vmSymbols::java_lang_reflect_Field(); 3492 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3493 InstanceKlass* ik = InstanceKlass::cast(k); 3494 // Ensure it is initialized 3495 ik->initialize(CHECK_NH); 3496 return ik->allocate_instance_handle(THREAD); 3497 } 3498 3499 oop java_lang_reflect_Field::clazz(oop reflect) { 3500 return reflect->obj_field(_clazz_offset); 3501 } 3502 3503 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 3504 reflect->obj_field_put(_clazz_offset, value); 3505 } 3506 3507 oop java_lang_reflect_Field::name(oop field) { 3508 return field->obj_field(_name_offset); 3509 } 3510 3511 void java_lang_reflect_Field::set_name(oop field, oop value) { 3512 field->obj_field_put(_name_offset, value); 3513 } 3514 3515 oop java_lang_reflect_Field::type(oop field) { 3516 return field->obj_field(_type_offset); 3517 } 3518 3519 void java_lang_reflect_Field::set_type(oop field, oop value) { 3520 field->obj_field_put(_type_offset, value); 3521 } 3522 3523 int java_lang_reflect_Field::slot(oop reflect) { 3524 return reflect->int_field(_slot_offset); 3525 } 3526 3527 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 3528 reflect->int_field_put(_slot_offset, value); 3529 } 3530 3531 int java_lang_reflect_Field::modifiers(oop field) { 3532 return field->int_field(_modifiers_offset); 3533 } 3534 3535 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 3536 field->int_field_put(_modifiers_offset, value); 3537 } 3538 3539 void java_lang_reflect_Field::set_flags(oop field, int value) { 3540 field->int_field_put(_flags_offset, value); 3541 } 3542 3543 void java_lang_reflect_Field::set_signature(oop field, oop value) { 3544 field->obj_field_put(_signature_offset, value); 3545 } 3546 3547 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 3548 field->obj_field_put(_annotations_offset, value); 3549 } 3550 3551 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) { 3552 // Allocate java.lang.reflect.RecordComponent instance 3553 HandleMark hm(THREAD); 3554 InstanceKlass* ik = vmClasses::RecordComponent_klass(); 3555 assert(ik != nullptr, "must be loaded"); 3556 ik->initialize(CHECK_NULL); 3557 3558 Handle element = ik->allocate_instance_handle(CHECK_NULL); 3559 3560 Handle decl_class(THREAD, holder->java_mirror()); 3561 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class()); 3562 3563 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8 3564 oop component_name = StringTable::intern(name, CHECK_NULL); 3565 java_lang_reflect_RecordComponent::set_name(element(), component_name); 3566 3567 Symbol* type = holder->constants()->symbol_at(component->descriptor_index()); 3568 Handle component_type_h = 3569 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL); 3570 java_lang_reflect_RecordComponent::set_type(element(), component_type_h()); 3571 3572 Method* accessor_method = nullptr; 3573 { 3574 // Prepend "()" to type to create the full method signature. 3575 ResourceMark rm(THREAD); 3576 int sig_len = type->utf8_length() + 3; // "()" and null char 3577 char* sig = NEW_RESOURCE_ARRAY(char, sig_len); 3578 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string()); 3579 TempNewSymbol full_sig = SymbolTable::new_symbol(sig); 3580 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find); 3581 } 3582 3583 if (accessor_method != nullptr) { 3584 methodHandle method(THREAD, accessor_method); 3585 oop m = Reflection::new_method(method, false, CHECK_NULL); 3586 java_lang_reflect_RecordComponent::set_accessor(element(), m); 3587 } else { 3588 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr); 3589 } 3590 3591 int sig_index = component->generic_signature_index(); 3592 if (sig_index > 0) { 3593 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8 3594 oop component_sig = StringTable::intern(sig, CHECK_NULL); 3595 java_lang_reflect_RecordComponent::set_signature(element(), component_sig); 3596 } else { 3597 java_lang_reflect_RecordComponent::set_signature(element(), nullptr); 3598 } 3599 3600 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL); 3601 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop); 3602 3603 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL); 3604 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop); 3605 3606 return element(); 3607 } 3608 3609 int reflect_ConstantPool::_oop_offset; 3610 3611 #define CONSTANTPOOL_FIELDS_DO(macro) \ 3612 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 3613 3614 void reflect_ConstantPool::compute_offsets() { 3615 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass(); 3616 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3617 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3618 } 3619 3620 #if INCLUDE_CDS 3621 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) { 3622 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3623 } 3624 #endif 3625 3626 int java_lang_reflect_Parameter::_name_offset; 3627 int java_lang_reflect_Parameter::_modifiers_offset; 3628 int java_lang_reflect_Parameter::_index_offset; 3629 int java_lang_reflect_Parameter::_executable_offset; 3630 3631 #define PARAMETER_FIELDS_DO(macro) \ 3632 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3633 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3634 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3635 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3636 3637 void java_lang_reflect_Parameter::compute_offsets() { 3638 InstanceKlass* k = vmClasses::reflect_Parameter_klass(); 3639 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3640 } 3641 3642 #if INCLUDE_CDS 3643 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) { 3644 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3645 } 3646 #endif 3647 3648 Handle java_lang_reflect_Parameter::create(TRAPS) { 3649 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3650 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3651 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3652 InstanceKlass* ik = InstanceKlass::cast(k); 3653 // Ensure it is initialized 3654 ik->initialize(CHECK_NH); 3655 return ik->allocate_instance_handle(THREAD); 3656 } 3657 3658 oop java_lang_reflect_Parameter::name(oop param) { 3659 return param->obj_field(_name_offset); 3660 } 3661 3662 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3663 param->obj_field_put(_name_offset, value); 3664 } 3665 3666 int java_lang_reflect_Parameter::modifiers(oop param) { 3667 return param->int_field(_modifiers_offset); 3668 } 3669 3670 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3671 param->int_field_put(_modifiers_offset, value); 3672 } 3673 3674 int java_lang_reflect_Parameter::index(oop param) { 3675 return param->int_field(_index_offset); 3676 } 3677 3678 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3679 param->int_field_put(_index_offset, value); 3680 } 3681 3682 oop java_lang_reflect_Parameter::executable(oop param) { 3683 return param->obj_field(_executable_offset); 3684 } 3685 3686 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3687 param->obj_field_put(_executable_offset, value); 3688 } 3689 3690 // java_lang_Module 3691 3692 int java_lang_Module::_loader_offset; 3693 int java_lang_Module::_name_offset; 3694 int java_lang_Module::_module_entry_offset; 3695 3696 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3697 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3698 return JavaCalls::construct_new_instance(vmClasses::Module_klass(), 3699 vmSymbols::java_lang_module_init_signature(), 3700 loader, module_name, CHECK_NH); 3701 } 3702 3703 #define MODULE_FIELDS_DO(macro) \ 3704 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3705 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false) 3706 3707 void java_lang_Module::compute_offsets() { 3708 InstanceKlass* k = vmClasses::Module_klass(); 3709 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3710 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3711 } 3712 3713 #if INCLUDE_CDS 3714 void java_lang_Module::serialize_offsets(SerializeClosure* f) { 3715 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3716 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3717 } 3718 #endif 3719 3720 oop java_lang_Module::loader(oop module) { 3721 return module->obj_field(_loader_offset); 3722 } 3723 3724 void java_lang_Module::set_loader(oop module, oop value) { 3725 module->obj_field_put(_loader_offset, value); 3726 } 3727 3728 oop java_lang_Module::name(oop module) { 3729 return module->obj_field(_name_offset); 3730 } 3731 3732 void java_lang_Module::set_name(oop module, oop value) { 3733 module->obj_field_put(_name_offset, value); 3734 } 3735 3736 ModuleEntry* java_lang_Module::module_entry_raw(oop module) { 3737 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 3738 assert(module != nullptr, "module can't be null"); 3739 assert(oopDesc::is_oop(module), "module must be oop"); 3740 3741 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3742 return module_entry; 3743 } 3744 3745 ModuleEntry* java_lang_Module::module_entry(oop module) { 3746 ModuleEntry* module_entry = module_entry_raw(module); 3747 if (module_entry == nullptr) { 3748 // If the inject field containing the ModuleEntry* is null then return the 3749 // class loader's unnamed module. 3750 oop loader = java_lang_Module::loader(module); 3751 Handle h_loader = Handle(Thread::current(), loader); 3752 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3753 return loader_cld->unnamed_module(); 3754 } 3755 return module_entry; 3756 } 3757 3758 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3759 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 3760 assert(module != nullptr, "module can't be null"); 3761 assert(oopDesc::is_oop(module), "module must be oop"); 3762 module->address_field_put(_module_entry_offset, (address)module_entry); 3763 } 3764 3765 Handle reflect_ConstantPool::create(TRAPS) { 3766 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3767 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass(); 3768 // Ensure it is initialized 3769 k->initialize(CHECK_NH); 3770 return k->allocate_instance_handle(THREAD); 3771 } 3772 3773 3774 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3775 oop mirror = value->pool_holder()->java_mirror(); 3776 // Save the mirror to get back the constant pool. 3777 reflect->obj_field_put(_oop_offset, mirror); 3778 } 3779 3780 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3781 3782 oop mirror = reflect->obj_field(_oop_offset); 3783 Klass* k = java_lang_Class::as_Klass(mirror); 3784 assert(k->is_instance_klass(), "Must be"); 3785 3786 // Get the constant pool back from the klass. Since class redefinition 3787 // merges the new constant pool into the old, this is essentially the 3788 // same constant pool as the original. If constant pool merging is 3789 // no longer done in the future, this will have to change to save 3790 // the original. 3791 return InstanceKlass::cast(k)->constants(); 3792 } 3793 3794 3795 // Support for java_lang_ref_Reference 3796 3797 bool java_lang_ref_Reference::_offsets_initialized; 3798 3799 int java_lang_ref_Reference::_referent_offset; 3800 int java_lang_ref_Reference::_queue_offset; 3801 int java_lang_ref_Reference::_next_offset; 3802 int java_lang_ref_Reference::_discovered_offset; 3803 3804 #define REFERENCE_FIELDS_DO(macro) \ 3805 macro(_referent_offset, k, "referent", object_signature, false); \ 3806 macro(_queue_offset, k, "queue", referencequeue_signature, false); \ 3807 macro(_next_offset, k, "next", reference_signature, false); \ 3808 macro(_discovered_offset, k, "discovered", reference_signature, false); 3809 3810 void java_lang_ref_Reference::compute_offsets() { 3811 if (_offsets_initialized) { 3812 return; 3813 } 3814 _offsets_initialized = true; 3815 InstanceKlass* k = vmClasses::Reference_klass(); 3816 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3817 } 3818 3819 #if INCLUDE_CDS 3820 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) { 3821 f->do_bool(&_offsets_initialized); 3822 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3823 } 3824 #endif 3825 3826 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3827 assert(obj != nullptr, "sanity"); 3828 if (offset != _referent_offset) { 3829 return false; 3830 } 3831 3832 Klass* k = obj->klass(); 3833 if (!k->is_instance_klass()) { 3834 return false; 3835 } 3836 3837 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3838 bool is_reference = ik->reference_type() != REF_NONE; 3839 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity"); 3840 return is_reference; 3841 } 3842 3843 int java_lang_boxing_object::_value_offset; 3844 int java_lang_boxing_object::_long_value_offset; 3845 3846 #define BOXING_FIELDS_DO(macro) \ 3847 macro(_value_offset, integerKlass, "value", int_signature, false); \ 3848 macro(_long_value_offset, longKlass, "value", long_signature, false); 3849 3850 void java_lang_boxing_object::compute_offsets() { 3851 InstanceKlass* integerKlass = vmClasses::Integer_klass(); 3852 InstanceKlass* longKlass = vmClasses::Long_klass(); 3853 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3854 } 3855 3856 #if INCLUDE_CDS 3857 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) { 3858 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3859 } 3860 #endif 3861 3862 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 3863 Klass* k = vmClasses::box_klass(type); 3864 if (k == nullptr) return nullptr; 3865 InstanceKlass* ik = InstanceKlass::cast(k); 3866 if (!ik->is_initialized()) { 3867 ik->initialize(CHECK_NULL); 3868 } 3869 return ik->allocate_instance(THREAD); 3870 } 3871 3872 3873 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 3874 oop box = initialize_and_allocate(type, CHECK_NULL); 3875 if (box == nullptr) return nullptr; 3876 switch (type) { 3877 case T_BOOLEAN: 3878 box->bool_field_put(_value_offset, value->z); 3879 break; 3880 case T_CHAR: 3881 box->char_field_put(_value_offset, value->c); 3882 break; 3883 case T_FLOAT: 3884 box->float_field_put(_value_offset, value->f); 3885 break; 3886 case T_DOUBLE: 3887 box->double_field_put(_long_value_offset, value->d); 3888 break; 3889 case T_BYTE: 3890 box->byte_field_put(_value_offset, value->b); 3891 break; 3892 case T_SHORT: 3893 box->short_field_put(_value_offset, value->s); 3894 break; 3895 case T_INT: 3896 box->int_field_put(_value_offset, value->i); 3897 break; 3898 case T_LONG: 3899 box->long_field_put(_long_value_offset, value->j); 3900 break; 3901 default: 3902 return nullptr; 3903 } 3904 return box; 3905 } 3906 3907 3908 BasicType java_lang_boxing_object::basic_type(oop box) { 3909 if (box == nullptr) return T_ILLEGAL; 3910 BasicType type = vmClasses::box_klass_type(box->klass()); 3911 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 3912 return T_ILLEGAL; 3913 return type; 3914 } 3915 3916 3917 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 3918 BasicType type = vmClasses::box_klass_type(box->klass()); 3919 switch (type) { 3920 case T_BOOLEAN: 3921 value->z = box->bool_field(_value_offset); 3922 break; 3923 case T_CHAR: 3924 value->c = box->char_field(_value_offset); 3925 break; 3926 case T_FLOAT: 3927 value->f = box->float_field(_value_offset); 3928 break; 3929 case T_DOUBLE: 3930 value->d = box->double_field(_long_value_offset); 3931 break; 3932 case T_BYTE: 3933 value->b = box->byte_field(_value_offset); 3934 break; 3935 case T_SHORT: 3936 value->s = box->short_field(_value_offset); 3937 break; 3938 case T_INT: 3939 value->i = box->int_field(_value_offset); 3940 break; 3941 case T_LONG: 3942 value->j = box->long_field(_long_value_offset); 3943 break; 3944 default: 3945 return T_ILLEGAL; 3946 } // end switch 3947 return type; 3948 } 3949 3950 3951 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3952 BasicType type = vmClasses::box_klass_type(box->klass()); 3953 switch (type) { 3954 case T_BOOLEAN: 3955 box->bool_field_put(_value_offset, value->z); 3956 break; 3957 case T_CHAR: 3958 box->char_field_put(_value_offset, value->c); 3959 break; 3960 case T_FLOAT: 3961 box->float_field_put(_value_offset, value->f); 3962 break; 3963 case T_DOUBLE: 3964 box->double_field_put(_long_value_offset, value->d); 3965 break; 3966 case T_BYTE: 3967 box->byte_field_put(_value_offset, value->b); 3968 break; 3969 case T_SHORT: 3970 box->short_field_put(_value_offset, value->s); 3971 break; 3972 case T_INT: 3973 box->int_field_put(_value_offset, value->i); 3974 break; 3975 case T_LONG: 3976 box->long_field_put(_long_value_offset, value->j); 3977 break; 3978 default: 3979 return T_ILLEGAL; 3980 } // end switch 3981 return type; 3982 } 3983 3984 3985 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3986 switch (type) { 3987 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3988 case T_CHAR: st->print("%d", value->c); break; 3989 case T_BYTE: st->print("%d", value->b); break; 3990 case T_SHORT: st->print("%d", value->s); break; 3991 case T_INT: st->print("%d", value->i); break; 3992 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 3993 case T_FLOAT: st->print("%f", value->f); break; 3994 case T_DOUBLE: st->print("%lf", value->d); break; 3995 default: st->print("type %d?", type); break; 3996 } 3997 } 3998 3999 4000 // Support for java_lang_ref_SoftReference 4001 // 4002 4003 int java_lang_ref_SoftReference::_timestamp_offset; 4004 int java_lang_ref_SoftReference::_static_clock_offset; 4005 4006 #define SOFTREFERENCE_FIELDS_DO(macro) \ 4007 macro(_timestamp_offset, k, "timestamp", long_signature, false); \ 4008 macro(_static_clock_offset, k, "clock", long_signature, true) 4009 4010 void java_lang_ref_SoftReference::compute_offsets() { 4011 InstanceKlass* k = vmClasses::SoftReference_klass(); 4012 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4013 } 4014 4015 #if INCLUDE_CDS 4016 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) { 4017 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4018 } 4019 #endif 4020 4021 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 4022 return ref->long_field(_timestamp_offset); 4023 } 4024 4025 jlong java_lang_ref_SoftReference::clock() { 4026 InstanceKlass* ik = vmClasses::SoftReference_klass(); 4027 oop base = ik->static_field_base_raw(); 4028 return base->long_field(_static_clock_offset); 4029 } 4030 4031 void java_lang_ref_SoftReference::set_clock(jlong value) { 4032 InstanceKlass* ik = vmClasses::SoftReference_klass(); 4033 oop base = ik->static_field_base_raw(); 4034 base->long_field_put(_static_clock_offset, value); 4035 } 4036 4037 // Support for java_lang_invoke_DirectMethodHandle 4038 4039 int java_lang_invoke_DirectMethodHandle::_member_offset; 4040 4041 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 4042 oop member_name = nullptr; 4043 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 4044 "a DirectMethodHandle oop is expected"); 4045 return dmh->obj_field(_member_offset); 4046 } 4047 4048 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 4049 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 4050 4051 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 4052 InstanceKlass* k = vmClasses::DirectMethodHandle_klass(); 4053 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4054 } 4055 4056 #if INCLUDE_CDS 4057 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) { 4058 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4059 } 4060 #endif 4061 4062 // Support for java_lang_invoke_MethodHandle 4063 4064 int java_lang_invoke_MethodHandle::_type_offset; 4065 int java_lang_invoke_MethodHandle::_form_offset; 4066 4067 int java_lang_invoke_MemberName::_clazz_offset; 4068 int java_lang_invoke_MemberName::_name_offset; 4069 int java_lang_invoke_MemberName::_type_offset; 4070 int java_lang_invoke_MemberName::_flags_offset; 4071 int java_lang_invoke_MemberName::_method_offset; 4072 int java_lang_invoke_MemberName::_vmindex_offset; 4073 4074 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 4075 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 4076 4077 int java_lang_invoke_LambdaForm::_vmentry_offset; 4078 4079 #define METHODHANDLE_FIELDS_DO(macro) \ 4080 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 4081 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 4082 4083 void java_lang_invoke_MethodHandle::compute_offsets() { 4084 InstanceKlass* k = vmClasses::MethodHandle_klass(); 4085 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4086 } 4087 4088 #if INCLUDE_CDS 4089 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) { 4090 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4091 } 4092 #endif 4093 4094 #define MEMBERNAME_FIELDS_DO(macro) \ 4095 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 4096 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 4097 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 4098 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 4099 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 4100 4101 void java_lang_invoke_MemberName::compute_offsets() { 4102 InstanceKlass* k = vmClasses::MemberName_klass(); 4103 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4104 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4105 } 4106 4107 #if INCLUDE_CDS 4108 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) { 4109 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4110 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4111 } 4112 #endif 4113 4114 #define RESOLVEDMETHOD_FIELDS_DO(macro) \ 4115 macro(_vmholder_offset, k, "vmholder", class_signature, false) 4116 4117 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 4118 InstanceKlass* k = vmClasses::ResolvedMethodName_klass(); 4119 assert(k != nullptr, "jdk mismatch"); 4120 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4121 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4122 } 4123 4124 #if INCLUDE_CDS 4125 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) { 4126 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4127 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4128 } 4129 #endif 4130 4131 #define LAMBDAFORM_FIELDS_DO(macro) \ 4132 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 4133 4134 void java_lang_invoke_LambdaForm::compute_offsets() { 4135 InstanceKlass* k = vmClasses::LambdaForm_klass(); 4136 assert (k != nullptr, "jdk mismatch"); 4137 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4138 } 4139 4140 #if INCLUDE_CDS 4141 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) { 4142 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4143 } 4144 #endif 4145 4146 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 4147 return obj != nullptr && is_subclass(obj->klass()); 4148 } 4149 4150 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset; 4151 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset; 4152 4153 #define NEP_FIELDS_DO(macro) \ 4154 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \ 4155 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false); 4156 4157 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) { 4158 return obj != nullptr && is_subclass(obj->klass()); 4159 } 4160 4161 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() { 4162 InstanceKlass* k = vmClasses::NativeEntryPoint_klass(); 4163 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4164 } 4165 4166 #if INCLUDE_CDS 4167 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) { 4168 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4169 } 4170 #endif 4171 4172 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) { 4173 return entry->obj_field(_method_type_offset); 4174 } 4175 4176 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) { 4177 return entry->long_field(_downcall_stub_address_offset); 4178 } 4179 4180 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset; 4181 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset; 4182 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset; 4183 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset; 4184 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset; 4185 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset; 4186 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset; 4187 4188 #define ABIDescriptor_FIELDS_DO(macro) \ 4189 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4190 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4191 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4192 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \ 4193 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \ 4194 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \ 4195 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false); 4196 4197 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) { 4198 return obj != nullptr && is_subclass(obj->klass()); 4199 } 4200 4201 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() { 4202 InstanceKlass* k = vmClasses::ABIDescriptor_klass(); 4203 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4204 } 4205 4206 #if INCLUDE_CDS 4207 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) { 4208 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4209 } 4210 #endif 4211 4212 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) { 4213 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset)); 4214 } 4215 4216 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) { 4217 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset)); 4218 } 4219 4220 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) { 4221 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset)); 4222 } 4223 4224 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) { 4225 return entry->int_field(_stackAlignment_offset); 4226 } 4227 4228 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) { 4229 return entry->int_field(_shadowSpace_offset); 4230 } 4231 4232 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) { 4233 return entry->obj_field(_scratch1_offset); 4234 } 4235 4236 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) { 4237 return entry->obj_field(_scratch2_offset); 4238 } 4239 4240 int jdk_internal_foreign_abi_VMStorage::_type_offset; 4241 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset; 4242 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset; 4243 int jdk_internal_foreign_abi_VMStorage::_debugName_offset; 4244 4245 #define VMStorage_FIELDS_DO(macro) \ 4246 macro(_type_offset, k, "type", byte_signature, false); \ 4247 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \ 4248 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \ 4249 macro(_debugName_offset, k, "debugName", string_signature, false); \ 4250 4251 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) { 4252 return obj != nullptr && is_subclass(obj->klass()); 4253 } 4254 4255 void jdk_internal_foreign_abi_VMStorage::compute_offsets() { 4256 InstanceKlass* k = vmClasses::VMStorage_klass(); 4257 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4258 } 4259 4260 #if INCLUDE_CDS 4261 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) { 4262 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4263 } 4264 #endif 4265 4266 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) { 4267 return entry->byte_field(_type_offset); 4268 } 4269 4270 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) { 4271 return entry->int_field(_indexOrOffset_offset); 4272 } 4273 4274 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) { 4275 return entry->short_field(_segmentMaskOrSize_offset); 4276 } 4277 4278 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) { 4279 return entry->obj_field(_debugName_offset); 4280 } 4281 4282 int jdk_internal_foreign_abi_CallConv::_argRegs_offset; 4283 int jdk_internal_foreign_abi_CallConv::_retRegs_offset; 4284 4285 #define CallConv_FIELDS_DO(macro) \ 4286 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \ 4287 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \ 4288 4289 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) { 4290 return obj != nullptr && is_subclass(obj->klass()); 4291 } 4292 4293 void jdk_internal_foreign_abi_CallConv::compute_offsets() { 4294 InstanceKlass* k = vmClasses::CallConv_klass(); 4295 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4296 } 4297 4298 #if INCLUDE_CDS 4299 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) { 4300 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4301 } 4302 #endif 4303 4304 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) { 4305 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset)); 4306 } 4307 4308 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) { 4309 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset)); 4310 } 4311 4312 oop java_lang_invoke_MethodHandle::type(oop mh) { 4313 return mh->obj_field(_type_offset); 4314 } 4315 4316 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 4317 mh->obj_field_put(_type_offset, mtype); 4318 } 4319 4320 oop java_lang_invoke_MethodHandle::form(oop mh) { 4321 assert(_form_offset != 0, ""); 4322 return mh->obj_field(_form_offset); 4323 } 4324 4325 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 4326 assert(_form_offset != 0, ""); 4327 mh->obj_field_put(_form_offset, lform); 4328 } 4329 4330 /// MemberName accessors 4331 4332 oop java_lang_invoke_MemberName::clazz(oop mname) { 4333 assert(is_instance(mname), "wrong type"); 4334 return mname->obj_field(_clazz_offset); 4335 } 4336 4337 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 4338 assert(is_instance(mname), "wrong type"); 4339 mname->obj_field_put(_clazz_offset, clazz); 4340 } 4341 4342 oop java_lang_invoke_MemberName::name(oop mname) { 4343 assert(is_instance(mname), "wrong type"); 4344 return mname->obj_field(_name_offset); 4345 } 4346 4347 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 4348 assert(is_instance(mname), "wrong type"); 4349 mname->obj_field_put(_name_offset, name); 4350 } 4351 4352 oop java_lang_invoke_MemberName::type(oop mname) { 4353 assert(is_instance(mname), "wrong type"); 4354 return mname->obj_field(_type_offset); 4355 } 4356 4357 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 4358 assert(is_instance(mname), "wrong type"); 4359 mname->obj_field_put(_type_offset, type); 4360 } 4361 4362 int java_lang_invoke_MemberName::flags(oop mname) { 4363 assert(is_instance(mname), "wrong type"); 4364 return mname->int_field(_flags_offset); 4365 } 4366 4367 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 4368 assert(is_instance(mname), "wrong type"); 4369 mname->int_field_put(_flags_offset, flags); 4370 } 4371 4372 4373 // Return vmtarget from ResolvedMethodName method field through indirection 4374 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 4375 assert(is_instance(mname), "wrong type"); 4376 oop method = mname->obj_field(_method_offset); 4377 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method); 4378 } 4379 4380 bool java_lang_invoke_MemberName::is_method(oop mname) { 4381 assert(is_instance(mname), "must be MemberName"); 4382 return (flags(mname) & (MN_IS_METHOD | MN_IS_OBJECT_CONSTRUCTOR)) > 0; 4383 } 4384 4385 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 4386 assert(is_instance(mname), "wrong type"); 4387 mname->obj_field_put(_method_offset, resolved_method); 4388 } 4389 4390 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 4391 assert(is_instance(mname), "wrong type"); 4392 return (intptr_t) mname->address_field(_vmindex_offset); 4393 } 4394 4395 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 4396 assert(is_instance(mname), "wrong type"); 4397 mname->address_field_put(_vmindex_offset, (address) index); 4398 } 4399 4400 4401 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 4402 assert(is_instance(resolved_method), "wrong type"); 4403 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 4404 assert(m->is_method(), "must be"); 4405 return m; 4406 } 4407 4408 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 4409 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 4410 assert(is_instance(resolved_method), "wrong type"); 4411 resolved_method->address_field_put(_vmtarget_offset, (address)m); 4412 } 4413 4414 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) { 4415 assert(is_instance(resolved_method), "wrong type"); 4416 resolved_method->obj_field_put(_vmholder_offset, holder); 4417 } 4418 4419 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 4420 const Method* method = m(); 4421 4422 // lookup ResolvedMethod oop in the table, or create a new one and intern it 4423 oop resolved_method = ResolvedMethodTable::find_method(method); 4424 if (resolved_method != nullptr) { 4425 return resolved_method; 4426 } 4427 4428 InstanceKlass* k = vmClasses::ResolvedMethodName_klass(); 4429 if (!k->is_initialized()) { 4430 k->initialize(CHECK_NULL); 4431 } 4432 4433 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 4434 4435 NoSafepointVerifier nsv; 4436 4437 if (method->is_old()) { 4438 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() : 4439 method->get_new_method(); 4440 } 4441 4442 InstanceKlass* holder = method->method_holder(); 4443 4444 set_vmtarget(new_resolved_method, const_cast<Method*>(method)); 4445 // Add a reference to the loader (actually mirror because hidden classes may not have 4446 // distinct loaders) to ensure the metadata is kept alive. 4447 // This mirror may be different than the one in clazz field. 4448 set_vmholder(new_resolved_method, holder->java_mirror()); 4449 4450 // Set flag in class to indicate this InstanceKlass has entries in the table 4451 // to avoid walking table during redefinition if none of the redefined classes 4452 // have any membernames in the table. 4453 holder->set_has_resolved_methods(); 4454 4455 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method)); 4456 } 4457 4458 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 4459 assert(is_instance(lform), "wrong type"); 4460 return lform->obj_field(_vmentry_offset); 4461 } 4462 4463 4464 // Support for java_lang_invoke_MethodType 4465 4466 int java_lang_invoke_MethodType::_rtype_offset; 4467 int java_lang_invoke_MethodType::_ptypes_offset; 4468 4469 #define METHODTYPE_FIELDS_DO(macro) \ 4470 macro(_rtype_offset, k, "rtype", class_signature, false); \ 4471 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 4472 4473 void java_lang_invoke_MethodType::compute_offsets() { 4474 InstanceKlass* k = vmClasses::MethodType_klass(); 4475 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4476 } 4477 4478 #if INCLUDE_CDS 4479 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) { 4480 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4481 } 4482 #endif 4483 4484 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 4485 st->print("("); 4486 objArrayOop pts = ptypes(mt); 4487 if (pts != nullptr) { 4488 for (int i = 0, limit = pts->length(); i < limit; i++) { 4489 java_lang_Class::print_signature(pts->obj_at(i), st); 4490 } 4491 } else { 4492 st->print("null"); 4493 } 4494 st->print(")"); 4495 oop rt = rtype(mt); 4496 if (rt != nullptr) { 4497 java_lang_Class::print_signature(rt, st); 4498 } else { 4499 st->print("null"); 4500 } 4501 } 4502 4503 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) { 4504 ResourceMark rm; 4505 stringStream buffer(128); 4506 print_signature(mt, &buffer); 4507 const char* sigstr = buffer.base(); 4508 int siglen = (int) buffer.size(); 4509 Symbol *name; 4510 if (!intern_if_not_found) { 4511 name = SymbolTable::probe(sigstr, siglen); 4512 } else { 4513 name = SymbolTable::new_symbol(sigstr, siglen); 4514 } 4515 return name; 4516 } 4517 4518 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 4519 if (mt1 == mt2) 4520 return true; 4521 if (rtype(mt1) != rtype(mt2)) 4522 return false; 4523 if (ptype_count(mt1) != ptype_count(mt2)) 4524 return false; 4525 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 4526 if (ptype(mt1, i) != ptype(mt2, i)) 4527 return false; 4528 } 4529 return true; 4530 } 4531 4532 oop java_lang_invoke_MethodType::rtype(oop mt) { 4533 assert(is_instance(mt), "must be a MethodType"); 4534 return mt->obj_field(_rtype_offset); 4535 } 4536 4537 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 4538 assert(is_instance(mt), "must be a MethodType"); 4539 return (objArrayOop) mt->obj_field(_ptypes_offset); 4540 } 4541 4542 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 4543 return ptypes(mt)->obj_at(idx); 4544 } 4545 4546 int java_lang_invoke_MethodType::ptype_count(oop mt) { 4547 return ptypes(mt)->length(); 4548 } 4549 4550 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 4551 objArrayOop pts = ptypes(mt); 4552 int count = pts->length(); 4553 int slots = 0; 4554 for (int i = 0; i < count; i++) { 4555 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 4556 slots += type2size[bt]; 4557 } 4558 return slots; 4559 } 4560 4561 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 4562 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 4563 return type2size[bt]; 4564 } 4565 4566 4567 // Support for java_lang_invoke_CallSite 4568 4569 int java_lang_invoke_CallSite::_target_offset; 4570 int java_lang_invoke_CallSite::_context_offset; 4571 4572 #define CALLSITE_FIELDS_DO(macro) \ 4573 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 4574 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false) 4575 4576 void java_lang_invoke_CallSite::compute_offsets() { 4577 InstanceKlass* k = vmClasses::CallSite_klass(); 4578 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4579 } 4580 4581 #if INCLUDE_CDS 4582 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) { 4583 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4584 } 4585 #endif 4586 4587 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) { 4588 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 4589 4590 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset); 4591 return dep_oop; 4592 } 4593 4594 // Support for java_lang_invoke_ConstantCallSite 4595 4596 int java_lang_invoke_ConstantCallSite::_is_frozen_offset; 4597 4598 #define CONSTANTCALLSITE_FIELDS_DO(macro) \ 4599 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false) 4600 4601 void java_lang_invoke_ConstantCallSite::compute_offsets() { 4602 InstanceKlass* k = vmClasses::ConstantCallSite_klass(); 4603 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4604 } 4605 4606 #if INCLUDE_CDS 4607 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) { 4608 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4609 } 4610 #endif 4611 4612 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 4613 4614 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 4615 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset; 4616 4617 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 4618 InstanceKlass* k = vmClasses::Context_klass(); 4619 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4620 } 4621 4622 #if INCLUDE_CDS 4623 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) { 4624 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4625 } 4626 #endif 4627 4628 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 4629 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 4630 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset); 4631 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset); 4632 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr); 4633 return dep_ctx; 4634 } 4635 4636 // Support for java_security_AccessControlContext 4637 4638 int java_security_AccessControlContext::_context_offset; 4639 int java_security_AccessControlContext::_privilegedContext_offset; 4640 int java_security_AccessControlContext::_isPrivileged_offset; 4641 int java_security_AccessControlContext::_isAuthorized_offset; 4642 4643 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \ 4644 macro(_context_offset, k, "context", protectiondomain_signature, false); \ 4645 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \ 4646 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \ 4647 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false) 4648 4649 void java_security_AccessControlContext::compute_offsets() { 4650 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 4651 InstanceKlass* k = vmClasses::AccessControlContext_klass(); 4652 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4653 } 4654 4655 #if INCLUDE_CDS 4656 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) { 4657 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4658 } 4659 #endif 4660 4661 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 4662 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 4663 assert(_isAuthorized_offset != 0, "offsets should have been initialized"); 4664 // Ensure klass is initialized 4665 vmClasses::AccessControlContext_klass()->initialize(CHECK_NULL); 4666 // Allocate result 4667 oop result = vmClasses::AccessControlContext_klass()->allocate_instance(CHECK_NULL); 4668 // Fill in values 4669 result->obj_field_put(_context_offset, context()); 4670 result->obj_field_put(_privilegedContext_offset, privileged_context()); 4671 result->bool_field_put(_isPrivileged_offset, isPrivileged); 4672 result->bool_field_put(_isAuthorized_offset, true); 4673 return result; 4674 } 4675 4676 4677 // Support for java_lang_ClassLoader 4678 4679 int java_lang_ClassLoader::_loader_data_offset; 4680 int java_lang_ClassLoader::_parallelCapable_offset; 4681 int java_lang_ClassLoader::_name_offset; 4682 int java_lang_ClassLoader::_nameAndId_offset; 4683 int java_lang_ClassLoader::_unnamedModule_offset; 4684 int java_lang_ClassLoader::_parent_offset; 4685 4686 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) { 4687 assert(loader != nullptr, "loader must not be null"); 4688 assert(oopDesc::is_oop(loader), "loader must be oop"); 4689 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset)); 4690 } 4691 4692 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 4693 assert(loader != nullptr, "loader must not be null"); 4694 assert(oopDesc::is_oop(loader), "loader must be oop"); 4695 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset); 4696 } 4697 4698 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) { 4699 assert(loader != nullptr, "loader must not be null"); 4700 assert(oopDesc::is_oop(loader), "loader must be oop"); 4701 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data); 4702 } 4703 4704 #define CLASSLOADER_FIELDS_DO(macro) \ 4705 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 4706 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 4707 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \ 4708 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 4709 macro(_parent_offset, k1, "parent", classloader_signature, false) 4710 4711 void java_lang_ClassLoader::compute_offsets() { 4712 InstanceKlass* k1 = vmClasses::ClassLoader_klass(); 4713 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4714 4715 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4716 } 4717 4718 #if INCLUDE_CDS 4719 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) { 4720 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4721 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4722 } 4723 #endif 4724 4725 oop java_lang_ClassLoader::parent(oop loader) { 4726 assert(is_instance(loader), "loader must be oop"); 4727 return loader->obj_field(_parent_offset); 4728 } 4729 4730 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) { 4731 assert(is_instance(loader), "loader must be oop"); 4732 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset); 4733 } 4734 4735 // Returns the name field of this class loader. If the name field has not 4736 // been set, null will be returned. 4737 oop java_lang_ClassLoader::name(oop loader) { 4738 assert(is_instance(loader), "loader must be oop"); 4739 return loader->obj_field(_name_offset); 4740 } 4741 4742 // Returns the nameAndId field of this class loader. The format is 4743 // as follows: 4744 // If the defining loader has a name explicitly set then '<loader-name>' @<id> 4745 // If the defining loader has no name then <qualified-class-name> @<id> 4746 // If built-in loader, then omit '@<id>' as there is only one instance. 4747 // Use ClassLoader::loader_name_id() to obtain this String as a char*. 4748 oop java_lang_ClassLoader::nameAndId(oop loader) { 4749 assert(is_instance(loader), "loader must be oop"); 4750 return loader->obj_field(_nameAndId_offset); 4751 } 4752 4753 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 4754 assert(is_instance(loader), "loader must be oop"); 4755 assert(cl == nullptr || is_instance(cl), "cl argument must be oop"); 4756 oop acl = loader; 4757 debug_only(jint loop_count = 0); 4758 // This loop taken verbatim from ClassLoader.java: 4759 do { 4760 acl = parent(acl); 4761 if (cl == acl) { 4762 return true; 4763 } 4764 assert(++loop_count > 0, "loop_count overflow"); 4765 } while (acl != nullptr); 4766 return false; 4767 } 4768 4769 bool java_lang_ClassLoader::is_instance(oop obj) { 4770 return obj != nullptr && is_subclass(obj->klass()); 4771 } 4772 4773 4774 // For class loader classes, parallelCapable defined 4775 // based on non-null field 4776 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 4777 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 4778 assert(_parallelCapable_offset != 0, "offsets should have been initialized"); 4779 return (class_loader->obj_field(_parallelCapable_offset) != nullptr); 4780 } 4781 4782 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 4783 // Fix for 4474172; see evaluation for more details 4784 loader = non_reflection_class_loader(loader); 4785 4786 oop cl = SystemDictionary::java_system_loader(); 4787 while(cl != nullptr) { 4788 if (cl == loader) return true; 4789 cl = parent(cl); 4790 } 4791 return false; 4792 } 4793 4794 // Return true if this is one of the class loaders associated with 4795 // the generated bytecodes for serialization constructor returned 4796 // by sun.reflect.ReflectionFactory::newConstructorForSerialization 4797 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 4798 if (loader != nullptr) { 4799 Klass* delegating_cl_class = vmClasses::reflect_DelegatingClassLoader_klass(); 4800 // This might be null in non-1.4 JDKs 4801 return (delegating_cl_class != nullptr && loader->is_a(delegating_cl_class)); 4802 } 4803 return false; 4804 } 4805 4806 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 4807 // See whether this is one of the class loaders associated with 4808 // the generated bytecodes for reflection, and if so, "magically" 4809 // delegate to its parent to prevent class loading from occurring 4810 // in places where applications using reflection didn't expect it. 4811 if (is_reflection_class_loader(loader)) { 4812 return parent(loader); 4813 } 4814 return loader; 4815 } 4816 4817 oop java_lang_ClassLoader::unnamedModule(oop loader) { 4818 assert(is_instance(loader), "loader must be oop"); 4819 return loader->obj_field(_unnamedModule_offset); 4820 } 4821 4822 // Support for java_lang_System 4823 // 4824 4825 int java_lang_System::_static_in_offset; 4826 int java_lang_System::_static_out_offset; 4827 int java_lang_System::_static_err_offset; 4828 int java_lang_System::_static_security_offset; 4829 int java_lang_System::_static_allow_security_offset; 4830 int java_lang_System::_static_never_offset; 4831 4832 #define SYSTEM_FIELDS_DO(macro) \ 4833 macro(_static_in_offset, k, "in", input_stream_signature, true); \ 4834 macro(_static_out_offset, k, "out", print_stream_signature, true); \ 4835 macro(_static_err_offset, k, "err", print_stream_signature, true); \ 4836 macro(_static_security_offset, k, "security", security_manager_signature, true); \ 4837 macro(_static_allow_security_offset, k, "allowSecurityManager", int_signature, true); \ 4838 macro(_static_never_offset, k, "NEVER", int_signature, true) 4839 4840 void java_lang_System::compute_offsets() { 4841 InstanceKlass* k = vmClasses::System_klass(); 4842 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4843 } 4844 4845 // This field tells us that a security manager can never be installed so we 4846 // can completely skip populating the ProtectionDomainCacheTable. 4847 bool java_lang_System::allow_security_manager() { 4848 static int initialized = false; 4849 static bool allowed = true; // default 4850 if (!initialized) { 4851 oop base = vmClasses::System_klass()->static_field_base_raw(); 4852 int never = base->int_field(_static_never_offset); 4853 allowed = (base->int_field(_static_allow_security_offset) != never); 4854 initialized = true; 4855 } 4856 return allowed; 4857 } 4858 4859 // This field tells us that a security manager is installed. 4860 bool java_lang_System::has_security_manager() { 4861 oop base = vmClasses::System_klass()->static_field_base_raw(); 4862 return base->obj_field(_static_security_offset) != nullptr; 4863 } 4864 4865 #if INCLUDE_CDS 4866 void java_lang_System::serialize_offsets(SerializeClosure* f) { 4867 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4868 } 4869 #endif 4870 4871 // Support for jdk_internal_misc_UnsafeConstants 4872 // 4873 class UnsafeConstantsFixup : public FieldClosure { 4874 private: 4875 int _address_size; 4876 int _page_size; 4877 bool _big_endian; 4878 bool _use_unaligned_access; 4879 int _data_cache_line_flush_size; 4880 public: 4881 UnsafeConstantsFixup() { 4882 // round up values for all static final fields 4883 _address_size = sizeof(void*); 4884 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size()); 4885 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true); 4886 _use_unaligned_access = UseUnalignedAccesses; 4887 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size(); 4888 } 4889 4890 void do_field(fieldDescriptor* fd) { 4891 oop mirror = fd->field_holder()->java_mirror(); 4892 assert(mirror != nullptr, "UnsafeConstants must have mirror already"); 4893 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants"); 4894 assert(fd->is_final(), "fields of UnsafeConstants must be final"); 4895 assert(fd->is_static(), "fields of UnsafeConstants must be static"); 4896 if (fd->name() == vmSymbols::address_size_name()) { 4897 mirror->int_field_put(fd->offset(), _address_size); 4898 } else if (fd->name() == vmSymbols::page_size_name()) { 4899 mirror->int_field_put(fd->offset(), _page_size); 4900 } else if (fd->name() == vmSymbols::big_endian_name()) { 4901 mirror->bool_field_put(fd->offset(), _big_endian); 4902 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) { 4903 mirror->bool_field_put(fd->offset(), _use_unaligned_access); 4904 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) { 4905 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size); 4906 } else { 4907 assert(false, "unexpected UnsafeConstants field"); 4908 } 4909 } 4910 }; 4911 4912 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() { 4913 UnsafeConstantsFixup fixup; 4914 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup); 4915 } 4916 4917 4918 // java_lang_StackTraceElement 4919 4920 int java_lang_StackTraceElement::_methodName_offset; 4921 int java_lang_StackTraceElement::_fileName_offset; 4922 int java_lang_StackTraceElement::_lineNumber_offset; 4923 int java_lang_StackTraceElement::_moduleName_offset; 4924 int java_lang_StackTraceElement::_moduleVersion_offset; 4925 int java_lang_StackTraceElement::_classLoaderName_offset; 4926 int java_lang_StackTraceElement::_declaringClass_offset; 4927 int java_lang_StackTraceElement::_declaringClassObject_offset; 4928 4929 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4930 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4931 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4932 macro(_moduleName_offset, k, "moduleName", string_signature, false); \ 4933 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4934 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \ 4935 macro(_methodName_offset, k, "methodName", string_signature, false); \ 4936 macro(_fileName_offset, k, "fileName", string_signature, false); \ 4937 macro(_lineNumber_offset, k, "lineNumber", int_signature, false) 4938 4939 // Support for java_lang_StackTraceElement 4940 void java_lang_StackTraceElement::compute_offsets() { 4941 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 4942 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4943 } 4944 4945 #if INCLUDE_CDS 4946 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) { 4947 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4948 } 4949 #endif 4950 4951 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 4952 element->obj_field_put(_fileName_offset, value); 4953 } 4954 4955 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 4956 element->obj_field_put(_declaringClass_offset, value); 4957 } 4958 4959 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 4960 element->obj_field_put(_methodName_offset, value); 4961 } 4962 4963 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 4964 element->int_field_put(_lineNumber_offset, value); 4965 } 4966 4967 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 4968 element->obj_field_put(_moduleName_offset, value); 4969 } 4970 4971 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 4972 element->obj_field_put(_moduleVersion_offset, value); 4973 } 4974 4975 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 4976 element->obj_field_put(_classLoaderName_offset, value); 4977 } 4978 4979 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 4980 element->obj_field_put(_declaringClassObject_offset, value); 4981 } 4982 4983 4984 // java_lang_AssertionStatusDirectives 4985 4986 int java_lang_AssertionStatusDirectives::_classes_offset; 4987 int java_lang_AssertionStatusDirectives::_classEnabled_offset; 4988 int java_lang_AssertionStatusDirectives::_packages_offset; 4989 int java_lang_AssertionStatusDirectives::_packageEnabled_offset; 4990 int java_lang_AssertionStatusDirectives::_deflt_offset; 4991 4992 // Support for java Assertions - java_lang_AssertionStatusDirectives. 4993 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 4994 macro(_classes_offset, k, "classes", string_array_signature, false); \ 4995 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 4996 macro(_packages_offset, k, "packages", string_array_signature, false); \ 4997 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 4998 macro(_deflt_offset, k, "deflt", bool_signature, false) 4999 5000 void java_lang_AssertionStatusDirectives::compute_offsets() { 5001 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass(); 5002 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5003 } 5004 5005 #if INCLUDE_CDS 5006 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) { 5007 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5008 } 5009 #endif 5010 5011 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 5012 o->obj_field_put(_classes_offset, val); 5013 } 5014 5015 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 5016 o->obj_field_put(_classEnabled_offset, val); 5017 } 5018 5019 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 5020 o->obj_field_put(_packages_offset, val); 5021 } 5022 5023 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 5024 o->obj_field_put(_packageEnabled_offset, val); 5025 } 5026 5027 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 5028 o->bool_field_put(_deflt_offset, val); 5029 } 5030 5031 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset; 5032 5033 #define AOS_FIELDS_DO(macro) \ 5034 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false) 5035 5036 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() { 5037 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass(); 5038 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5039 } 5040 5041 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 5042 assert(_owner_offset != 0, "Must be initialized"); 5043 return obj->obj_field(_owner_offset); 5044 } 5045 5046 #if INCLUDE_CDS 5047 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) { 5048 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5049 } 5050 #endif 5051 5052 int vector_VectorPayload::_payload_offset; 5053 5054 #define VECTORPAYLOAD_FIELDS_DO(macro) \ 5055 macro(_payload_offset, k, "payload", object_signature, false) 5056 5057 void vector_VectorPayload::compute_offsets() { 5058 InstanceKlass* k = vmClasses::vector_VectorPayload_klass(); 5059 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5060 } 5061 5062 #if INCLUDE_CDS 5063 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) { 5064 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5065 } 5066 #endif 5067 5068 void vector_VectorPayload::set_payload(oop o, oop val) { 5069 o->obj_field_put(_payload_offset, val); 5070 } 5071 5072 bool vector_VectorPayload::is_instance(oop obj) { 5073 return obj != nullptr && is_subclass(obj->klass()); 5074 } 5075 5076 int java_lang_Integer_IntegerCache::_static_cache_offset; 5077 int java_lang_Long_LongCache::_static_cache_offset; 5078 int java_lang_Character_CharacterCache::_static_cache_offset; 5079 int java_lang_Short_ShortCache::_static_cache_offset; 5080 int java_lang_Byte_ByteCache::_static_cache_offset; 5081 5082 #define INTEGER_CACHE_FIELDS_DO(macro) \ 5083 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true) 5084 5085 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) { 5086 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5087 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5088 } 5089 5090 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) { 5091 oop base = ik->static_field_base_raw(); 5092 return objArrayOop(base->obj_field(_static_cache_offset)); 5093 } 5094 5095 Symbol* java_lang_Integer_IntegerCache::symbol() { 5096 return vmSymbols::java_lang_Integer_IntegerCache(); 5097 } 5098 5099 #if INCLUDE_CDS 5100 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) { 5101 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5102 } 5103 #endif 5104 #undef INTEGER_CACHE_FIELDS_DO 5105 5106 jint java_lang_Integer::value(oop obj) { 5107 jvalue v; 5108 java_lang_boxing_object::get_value(obj, &v); 5109 return v.i; 5110 } 5111 5112 #define LONG_CACHE_FIELDS_DO(macro) \ 5113 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true) 5114 5115 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) { 5116 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5117 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5118 } 5119 5120 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) { 5121 oop base = ik->static_field_base_raw(); 5122 return objArrayOop(base->obj_field(_static_cache_offset)); 5123 } 5124 5125 Symbol* java_lang_Long_LongCache::symbol() { 5126 return vmSymbols::java_lang_Long_LongCache(); 5127 } 5128 5129 #if INCLUDE_CDS 5130 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) { 5131 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5132 } 5133 #endif 5134 #undef LONG_CACHE_FIELDS_DO 5135 5136 jlong java_lang_Long::value(oop obj) { 5137 jvalue v; 5138 java_lang_boxing_object::get_value(obj, &v); 5139 return v.j; 5140 } 5141 5142 #define CHARACTER_CACHE_FIELDS_DO(macro) \ 5143 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true) 5144 5145 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) { 5146 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5147 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5148 } 5149 5150 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) { 5151 oop base = ik->static_field_base_raw(); 5152 return objArrayOop(base->obj_field(_static_cache_offset)); 5153 } 5154 5155 Symbol* java_lang_Character_CharacterCache::symbol() { 5156 return vmSymbols::java_lang_Character_CharacterCache(); 5157 } 5158 5159 #if INCLUDE_CDS 5160 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) { 5161 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5162 } 5163 #endif 5164 #undef CHARACTER_CACHE_FIELDS_DO 5165 5166 jchar java_lang_Character::value(oop obj) { 5167 jvalue v; 5168 java_lang_boxing_object::get_value(obj, &v); 5169 return v.c; 5170 } 5171 5172 #define SHORT_CACHE_FIELDS_DO(macro) \ 5173 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true) 5174 5175 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) { 5176 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5177 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5178 } 5179 5180 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) { 5181 oop base = ik->static_field_base_raw(); 5182 return objArrayOop(base->obj_field(_static_cache_offset)); 5183 } 5184 5185 Symbol* java_lang_Short_ShortCache::symbol() { 5186 return vmSymbols::java_lang_Short_ShortCache(); 5187 } 5188 5189 #if INCLUDE_CDS 5190 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) { 5191 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5192 } 5193 #endif 5194 #undef SHORT_CACHE_FIELDS_DO 5195 5196 jshort java_lang_Short::value(oop obj) { 5197 jvalue v; 5198 java_lang_boxing_object::get_value(obj, &v); 5199 return v.s; 5200 } 5201 5202 #define BYTE_CACHE_FIELDS_DO(macro) \ 5203 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true) 5204 5205 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) { 5206 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5207 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5208 } 5209 5210 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) { 5211 oop base = ik->static_field_base_raw(); 5212 return objArrayOop(base->obj_field(_static_cache_offset)); 5213 } 5214 5215 Symbol* java_lang_Byte_ByteCache::symbol() { 5216 return vmSymbols::java_lang_Byte_ByteCache(); 5217 } 5218 5219 #if INCLUDE_CDS 5220 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) { 5221 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5222 } 5223 #endif 5224 #undef BYTE_CACHE_FIELDS_DO 5225 5226 jbyte java_lang_Byte::value(oop obj) { 5227 jvalue v; 5228 java_lang_boxing_object::get_value(obj, &v); 5229 return v.b; 5230 } 5231 5232 int java_lang_Boolean::_static_TRUE_offset; 5233 int java_lang_Boolean::_static_FALSE_offset; 5234 5235 #define BOOLEAN_FIELDS_DO(macro) \ 5236 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \ 5237 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true) 5238 5239 5240 void java_lang_Boolean::compute_offsets(InstanceKlass *k) { 5241 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5242 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5243 } 5244 5245 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) { 5246 oop base = ik->static_field_base_raw(); 5247 return base->obj_field(_static_TRUE_offset); 5248 } 5249 5250 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) { 5251 oop base = ik->static_field_base_raw(); 5252 return base->obj_field(_static_FALSE_offset); 5253 } 5254 5255 Symbol* java_lang_Boolean::symbol() { 5256 return vmSymbols::java_lang_Boolean(); 5257 } 5258 5259 #if INCLUDE_CDS 5260 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) { 5261 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5262 } 5263 #endif 5264 #undef BOOLEAN_CACHE_FIELDS_DO 5265 5266 jboolean java_lang_Boolean::value(oop obj) { 5267 jvalue v; 5268 java_lang_boxing_object::get_value(obj, &v); 5269 return v.z; 5270 } 5271 5272 // java_lang_reflect_RecordComponent 5273 5274 int java_lang_reflect_RecordComponent::_clazz_offset; 5275 int java_lang_reflect_RecordComponent::_name_offset; 5276 int java_lang_reflect_RecordComponent::_type_offset; 5277 int java_lang_reflect_RecordComponent::_accessor_offset; 5278 int java_lang_reflect_RecordComponent::_signature_offset; 5279 int java_lang_reflect_RecordComponent::_annotations_offset; 5280 int java_lang_reflect_RecordComponent::_typeAnnotations_offset; 5281 5282 #define RECORDCOMPONENT_FIELDS_DO(macro) \ 5283 macro(_clazz_offset, k, "clazz", class_signature, false); \ 5284 macro(_name_offset, k, "name", string_signature, false); \ 5285 macro(_type_offset, k, "type", class_signature, false); \ 5286 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \ 5287 macro(_signature_offset, k, "signature", string_signature, false); \ 5288 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \ 5289 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false); 5290 5291 // Support for java_lang_reflect_RecordComponent 5292 void java_lang_reflect_RecordComponent::compute_offsets() { 5293 InstanceKlass* k = vmClasses::RecordComponent_klass(); 5294 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5295 } 5296 5297 #if INCLUDE_CDS 5298 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) { 5299 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5300 } 5301 #endif 5302 5303 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) { 5304 element->obj_field_put(_clazz_offset, value); 5305 } 5306 5307 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) { 5308 element->obj_field_put(_name_offset, value); 5309 } 5310 5311 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) { 5312 element->obj_field_put(_type_offset, value); 5313 } 5314 5315 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) { 5316 element->obj_field_put(_accessor_offset, value); 5317 } 5318 5319 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) { 5320 element->obj_field_put(_signature_offset, value); 5321 } 5322 5323 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) { 5324 element->obj_field_put(_annotations_offset, value); 5325 } 5326 5327 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) { 5328 element->obj_field_put(_typeAnnotations_offset, value); 5329 } 5330 5331 // java_lang_InternalError 5332 int java_lang_InternalError::_during_unsafe_access_offset; 5333 5334 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) { 5335 internal_error->bool_field_put(_during_unsafe_access_offset, true); 5336 } 5337 5338 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) { 5339 return internal_error->bool_field(_during_unsafe_access_offset); 5340 } 5341 5342 void java_lang_InternalError::compute_offsets() { 5343 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 5344 } 5345 5346 #if INCLUDE_CDS 5347 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) { 5348 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 5349 } 5350 #endif 5351 5352 #define BASIC_JAVA_CLASSES_DO_PART1(f) \ 5353 f(java_lang_Class) \ 5354 f(java_lang_String) \ 5355 f(java_lang_ref_Reference) \ 5356 //end 5357 5358 #define BASIC_JAVA_CLASSES_DO_PART2(f) \ 5359 f(java_lang_System) \ 5360 f(java_lang_ClassLoader) \ 5361 f(java_lang_Throwable) \ 5362 f(java_lang_Thread) \ 5363 f(java_lang_Thread_FieldHolder) \ 5364 f(java_lang_Thread_Constants) \ 5365 f(java_lang_ThreadGroup) \ 5366 f(java_lang_VirtualThread) \ 5367 f(java_lang_InternalError) \ 5368 f(java_lang_AssertionStatusDirectives) \ 5369 f(java_lang_ref_SoftReference) \ 5370 f(java_lang_invoke_MethodHandle) \ 5371 f(java_lang_invoke_DirectMethodHandle) \ 5372 f(java_lang_invoke_MemberName) \ 5373 f(java_lang_invoke_ResolvedMethodName) \ 5374 f(java_lang_invoke_LambdaForm) \ 5375 f(java_lang_invoke_MethodType) \ 5376 f(java_lang_invoke_CallSite) \ 5377 f(java_lang_invoke_ConstantCallSite) \ 5378 f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \ 5379 f(java_security_AccessControlContext) \ 5380 f(java_lang_reflect_AccessibleObject) \ 5381 f(java_lang_reflect_Method) \ 5382 f(java_lang_reflect_Constructor) \ 5383 f(java_lang_reflect_Field) \ 5384 f(java_lang_reflect_RecordComponent) \ 5385 f(reflect_ConstantPool) \ 5386 f(java_lang_reflect_Parameter) \ 5387 f(java_lang_Module) \ 5388 f(java_lang_StackTraceElement) \ 5389 f(java_lang_ClassFrameInfo) \ 5390 f(java_lang_StackFrameInfo) \ 5391 f(java_lang_LiveStackFrameInfo) \ 5392 f(jdk_internal_vm_ContinuationScope) \ 5393 f(jdk_internal_vm_Continuation) \ 5394 f(jdk_internal_vm_StackChunk) \ 5395 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \ 5396 f(jdk_internal_foreign_abi_NativeEntryPoint) \ 5397 f(jdk_internal_foreign_abi_ABIDescriptor) \ 5398 f(jdk_internal_foreign_abi_VMStorage) \ 5399 f(jdk_internal_foreign_abi_CallConv) \ 5400 f(jdk_internal_misc_UnsafeConstants) \ 5401 f(java_lang_boxing_object) \ 5402 f(vector_VectorPayload) \ 5403 //end 5404 5405 #define BASIC_JAVA_CLASSES_DO(f) \ 5406 BASIC_JAVA_CLASSES_DO_PART1(f) \ 5407 BASIC_JAVA_CLASSES_DO_PART2(f) 5408 5409 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets(); 5410 5411 // Compute field offsets of all the classes in this file 5412 void JavaClasses::compute_offsets() { 5413 if (CDSConfig::is_using_archive()) { 5414 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() && 5415 JvmtiExport::has_early_class_hook_env()), 5416 "JavaClasses::compute_offsets() must be called in early JVMTI phase.")); 5417 // None of the classes used by the rest of this function can be replaced by 5418 // JVMTI ClassFileLoadHook. 5419 // We are safe to use the archived offsets, which have already been restored 5420 // by JavaClasses::serialize_offsets, without computing the offsets again. 5421 return; 5422 } 5423 5424 // We have already called the compute_offsets() of the 5425 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and 5426 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all() 5427 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS); 5428 } 5429 5430 #if INCLUDE_CDS 5431 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc); 5432 5433 void JavaClasses::serialize_offsets(SerializeClosure* soc) { 5434 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS); 5435 } 5436 #endif 5437 5438 #if INCLUDE_CDS_JAVA_HEAP 5439 bool JavaClasses::is_supported_for_archiving(oop obj) { 5440 Klass* klass = obj->klass(); 5441 5442 if (klass == vmClasses::ClassLoader_klass() || // ClassLoader::loader_data is malloc'ed. 5443 // The next 3 classes are used to implement java.lang.invoke, and are not used directly in 5444 // regular Java code. The implementation of java.lang.invoke uses generated hidden classes 5445 // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS. 5446 // So for now we cannot not support these classes for archiving. 5447 // 5448 // These objects typically are not referenced by static fields, but rather by resolved 5449 // constant pool entries, so excluding them shouldn't affect the archiving of static fields. 5450 klass == vmClasses::ResolvedMethodName_klass() || 5451 klass == vmClasses::MemberName_klass() || 5452 klass == vmClasses::Context_klass() || 5453 // It's problematic to archive Reference objects. One of the reasons is that 5454 // Reference::discovered may pull in unwanted objects (see JDK-8284336) 5455 klass->is_subclass_of(vmClasses::Reference_klass())) { 5456 return false; 5457 } 5458 5459 return true; 5460 } 5461 #endif 5462 5463 #ifndef PRODUCT 5464 5465 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check. 5466 5467 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name, 5468 const char* field_sig) { 5469 EXCEPTION_MARK; 5470 fieldDescriptor fd; 5471 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name); 5472 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 5473 InstanceKlass* ik = InstanceKlass::cast(k); 5474 TempNewSymbol f_name = SymbolTable::new_symbol(field_name); 5475 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig); 5476 if (!ik->find_local_field(f_name, f_sig, &fd)) { 5477 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 5478 return false; 5479 } 5480 if (fd.is_static()) { 5481 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 5482 return false; 5483 } 5484 if (fd.offset() == deserialized_offset ) { 5485 return true; 5486 } else { 5487 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.", 5488 klass_name, field_name, deserialized_offset, fd.offset()); 5489 return false; 5490 } 5491 } 5492 5493 void JavaClasses::check_offsets() { 5494 bool valid = true; 5495 5496 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 5497 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig) 5498 5499 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 5500 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig) 5501 5502 // Boxed primitive objects (java_lang_boxing_object) 5503 5504 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 5505 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 5506 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 5507 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 5508 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 5509 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 5510 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 5511 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 5512 5513 if (!valid) vm_exit_during_initialization("Field offset verification failed"); 5514 } 5515 5516 #endif // PRODUCT 5517 5518 int InjectedField::compute_offset() { 5519 InstanceKlass* ik = InstanceKlass::cast(klass()); 5520 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 5521 if (!may_be_java && !fs.field_flags().is_injected()) { 5522 // Only look at injected fields 5523 continue; 5524 } 5525 if (fs.name() == name() && fs.signature() == signature()) { 5526 return fs.offset(); 5527 } 5528 } 5529 ResourceMark rm; 5530 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)" : ""); 5531 #ifndef PRODUCT 5532 ik->print(); 5533 tty->print_cr("all fields:"); 5534 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 5535 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 5536 } 5537 #endif //PRODUCT 5538 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 5539 return -1; 5540 } 5541 5542 void javaClasses_init() { 5543 JavaClasses::compute_offsets(); 5544 JavaClasses::check_offsets(); 5545 FilteredFieldsMap::initialize(); // must be done after computing offsets. 5546 }