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/instanceKlass.inline.hpp" 57 #include "oops/instanceMirrorKlass.hpp" 58 #include "oops/klass.hpp" 59 #include "oops/klass.inline.hpp" 60 #include "oops/method.inline.hpp" 61 #include "oops/objArrayKlass.hpp" 62 #include "oops/objArrayOop.inline.hpp" 63 #include "oops/oopCast.inline.hpp" 64 #include "oops/oop.inline.hpp" 65 #include "oops/symbol.hpp" 66 #include "oops/recordComponent.hpp" 67 #include "oops/typeArrayOop.inline.hpp" 68 #include "prims/jvmtiExport.hpp" 69 #include "prims/methodHandles.hpp" 70 #include "prims/resolvedMethodTable.hpp" 71 #include "runtime/continuationEntry.inline.hpp" 72 #include "runtime/continuationJavaClasses.inline.hpp" 73 #include "runtime/fieldDescriptor.inline.hpp" 74 #include "runtime/frame.inline.hpp" 75 #include "runtime/handles.inline.hpp" 76 #include "runtime/handshake.hpp" 77 #include "runtime/init.hpp" 78 #include "runtime/interfaceSupport.inline.hpp" 79 #include "runtime/java.hpp" 80 #include "runtime/javaCalls.hpp" 81 #include "runtime/javaThread.hpp" 82 #include "runtime/jniHandles.inline.hpp" 83 #include "runtime/reflectionUtils.hpp" 84 #include "runtime/safepoint.hpp" 85 #include "runtime/safepointVerifiers.hpp" 86 #include "runtime/threadSMR.hpp" 87 #include "runtime/vframe.inline.hpp" 88 #include "runtime/vm_version.hpp" 89 #include "utilities/align.hpp" 90 #include "utilities/globalDefinitions.hpp" 91 #include "utilities/growableArray.hpp" 92 #include "utilities/preserveException.hpp" 93 #include "utilities/utf8.hpp" 94 #if INCLUDE_JVMCI 95 #include "jvmci/jvmciJavaClasses.hpp" 96 #endif 97 98 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 99 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 100 101 InjectedField JavaClasses::_injected_fields[] = { 102 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 103 }; 104 105 // Register native methods of Object 106 void java_lang_Object::register_natives(TRAPS) { 107 InstanceKlass* obj = vmClasses::Object_klass(); 108 Method::register_native(obj, vmSymbols::hashCode_name(), 109 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK); 110 Method::register_native(obj, vmSymbols::wait_name(), 111 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK); 112 Method::register_native(obj, vmSymbols::notify_name(), 113 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK); 114 Method::register_native(obj, vmSymbols::notifyAll_name(), 115 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK); 116 Method::register_native(obj, vmSymbols::clone_name(), 117 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD); 118 } 119 120 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 121 return _injected_fields[(int)id].compute_offset(); 122 } 123 124 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 125 *field_count = 0; 126 127 vmSymbolID sid = vmSymbols::find_sid(class_name); 128 if (sid == vmSymbolID::NO_SID) { 129 // Only well known classes can inject fields 130 return nullptr; 131 } 132 133 int count = 0; 134 int start = -1; 135 136 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 137 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \ 138 count++; \ 139 if (start == -1) { \ 140 start = (int)InjectedFieldID::klass##_##name##_enum; \ 141 } \ 142 } 143 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 144 #undef LOOKUP_INJECTED_FIELD 145 146 if (start != -1) { 147 *field_count = count; 148 return _injected_fields + start; 149 } 150 return nullptr; 151 } 152 153 154 // Helpful routine for computing field offsets at run time rather than hardcoding them 155 // Finds local fields only, including static fields. Static field offsets are from the 156 // beginning of the mirror. 157 void JavaClasses::compute_offset(int &dest_offset, 158 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol, 159 bool is_static) { 160 fieldDescriptor fd; 161 if (ik == nullptr) { 162 ResourceMark rm; 163 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string()); 164 vm_exit_during_initialization("Invalid layout of well-known class"); 165 } 166 167 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) { 168 ResourceMark rm; 169 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(), 170 name_symbol->as_C_string(), signature_symbol->as_C_string()); 171 #ifndef PRODUCT 172 // Prints all fields and offsets 173 Log(class) lt; 174 LogStream ls(lt.error()); 175 ik->print_on(&ls); 176 #endif //PRODUCT 177 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 178 } 179 dest_offset = fd.offset(); 180 } 181 182 // Overloading to pass name as a string. 183 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik, 184 const char* name_string, Symbol* signature_symbol, 185 bool is_static) { 186 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string)); 187 if (name == nullptr) { 188 ResourceMark rm; 189 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string); 190 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name()); 191 } 192 compute_offset(dest_offset, ik, name, signature_symbol, is_static); 193 } 194 195 // java_lang_String 196 197 int java_lang_String::_value_offset; 198 int java_lang_String::_hash_offset; 199 int java_lang_String::_hashIsZero_offset; 200 int java_lang_String::_coder_offset; 201 int java_lang_String::_flags_offset; 202 203 bool java_lang_String::_initialized; 204 205 206 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) { 207 uint8_t* addr = flags_addr(java_string); 208 uint8_t value = Atomic::load(addr); 209 while ((value & flag_mask) == 0) { 210 uint8_t old_value = value; 211 value |= flag_mask; 212 value = Atomic::cmpxchg(addr, old_value, value); 213 if (value == old_value) return false; // Flag bit changed from 0 to 1. 214 } 215 return true; // Flag bit is already 1. 216 } 217 218 #define STRING_FIELDS_DO(macro) \ 219 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \ 220 macro(_hash_offset, k, "hash", int_signature, false); \ 221 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \ 222 macro(_coder_offset, k, "coder", byte_signature, false); 223 224 void java_lang_String::compute_offsets() { 225 if (_initialized) { 226 return; 227 } 228 229 InstanceKlass* k = vmClasses::String_klass(); 230 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 231 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 232 233 _initialized = true; 234 } 235 236 #if INCLUDE_CDS 237 void java_lang_String::serialize_offsets(SerializeClosure* f) { 238 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 239 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 240 f->do_bool(&_initialized); 241 } 242 #endif 243 244 class CompactStringsFixup : public FieldClosure { 245 private: 246 bool _value; 247 248 public: 249 CompactStringsFixup(bool value) : _value(value) {} 250 251 void do_field(fieldDescriptor* fd) { 252 if (fd->name() == vmSymbols::compact_strings_name()) { 253 oop mirror = fd->field_holder()->java_mirror(); 254 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String"); 255 assert(mirror != nullptr, "String must have mirror already"); 256 mirror->bool_field_put(fd->offset(), _value); 257 } 258 } 259 }; 260 261 void java_lang_String::set_compact_strings(bool value) { 262 CompactStringsFixup fix(value); 263 vmClasses::String_klass()->do_local_static_fields(&fix); 264 } 265 266 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 267 assert(_initialized, "Must be initialized"); 268 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 269 270 // Create the String object first, so there's a chance that the String 271 // and the char array it points to end up in the same cache line. 272 oop obj; 273 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH); 274 275 // Create the char array. The String object must be handlized here 276 // because GC can happen as a result of the allocation attempt. 277 Handle h_obj(THREAD, obj); 278 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 279 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 280 281 // Point the String at the char array 282 obj = h_obj(); 283 set_value(obj, buffer); 284 // No need to zero the offset, allocation zero'ed the entire String object 285 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 286 return h_obj; 287 } 288 289 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) { 290 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 291 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 292 typeArrayOop buffer = value(h_obj()); 293 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 294 if (is_latin1) { 295 for (int index = 0; index < length; index++) { 296 buffer->byte_at_put(index, (jbyte)unicode[index]); 297 } 298 } else { 299 for (int index = 0; index < length; index++) { 300 buffer->char_at_put(index, unicode[index]); 301 } 302 } 303 304 #ifdef ASSERT 305 { 306 ResourceMark rm; 307 char* expected = UNICODE::as_utf8(unicode, length); 308 char* actual = as_utf8_string(h_obj()); 309 if (strcmp(expected, actual) != 0) { 310 fatal("Unicode conversion failure: %s --> %s", expected, actual); 311 } 312 } 313 #endif 314 315 return h_obj; 316 } 317 318 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) { 319 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL); 320 return h_obj(); 321 } 322 323 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 324 if (utf8_str == nullptr) { 325 return Handle(); 326 } 327 bool has_multibyte, is_latin1; 328 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 329 if (!CompactStrings) { 330 has_multibyte = true; 331 is_latin1 = false; 332 } 333 334 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 335 if (length > 0) { 336 if (!has_multibyte) { 337 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 338 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 339 } else if (is_latin1) { 340 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 341 } else { 342 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 343 } 344 } 345 346 #ifdef ASSERT 347 // This check is too strict when the input string is not a valid UTF8. 348 // For example, it may be created with arbitrary content via jni_NewStringUTF. 349 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, (int)strlen(utf8_str), false)) { 350 ResourceMark rm; 351 const char* expected = utf8_str; 352 char* actual = as_utf8_string(h_obj()); 353 if (strcmp(expected, actual) != 0) { 354 fatal("String conversion failure: %s --> %s", expected, actual); 355 } 356 } 357 #endif 358 359 return h_obj; 360 } 361 362 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 363 Handle h_obj = create_from_str(utf8_str, CHECK_NULL); 364 return h_obj(); 365 } 366 367 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 368 const char* utf8_str = (char*)symbol->bytes(); 369 int utf8_len = symbol->utf8_length(); 370 371 bool has_multibyte, is_latin1; 372 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 373 if (!CompactStrings) { 374 has_multibyte = true; 375 is_latin1 = false; 376 } 377 378 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 379 if (length > 0) { 380 if (!has_multibyte) { 381 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 382 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 383 } else if (is_latin1) { 384 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 385 } else { 386 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 387 } 388 } 389 390 #ifdef ASSERT 391 { 392 ResourceMark rm; 393 const char* expected = symbol->as_utf8(); 394 char* actual = as_utf8_string(h_obj()); 395 if (strncmp(expected, actual, utf8_len) != 0) { 396 fatal("Symbol conversion failure: %s --> %s", expected, actual); 397 } 398 } 399 #endif 400 401 return h_obj; 402 } 403 404 // Converts a C string to a Java String based on current encoding 405 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 406 assert(str != nullptr, "bad arguments"); 407 408 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *); 409 static to_java_string_fn_t _to_java_string_fn = nullptr; 410 411 if (_to_java_string_fn == nullptr) { 412 void *lib_handle = os::native_java_library(); 413 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform")); 414 #if defined(_WIN32) && !defined(_WIN64) 415 if (_to_java_string_fn == nullptr) { 416 // On 32 bit Windows, also try __stdcall decorated name 417 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8")); 418 } 419 #endif 420 if (_to_java_string_fn == nullptr) { 421 fatal("JNU_NewStringPlatform missing"); 422 } 423 } 424 425 jstring js = nullptr; 426 { 427 JavaThread* thread = THREAD; 428 HandleMark hm(thread); 429 ThreadToNativeFromVM ttn(thread); 430 js = (_to_java_string_fn)(thread->jni_environment(), str); 431 } 432 433 Handle native_platform_string(THREAD, JNIHandles::resolve(js)); 434 JNIHandles::destroy_local(js); // destroy local JNIHandle. 435 return native_platform_string; 436 } 437 438 // Converts a Java String to a native C string that can be used for 439 // native OS calls. 440 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 441 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 442 static to_platform_string_fn_t _to_platform_string_fn = nullptr; 443 444 if (_to_platform_string_fn == nullptr) { 445 void *lib_handle = os::native_java_library(); 446 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 447 if (_to_platform_string_fn == nullptr) { 448 fatal("GetStringPlatformChars missing"); 449 } 450 } 451 452 char *native_platform_string; 453 jstring js; 454 { JavaThread* thread = THREAD; 455 js = (jstring) JNIHandles::make_local(thread, java_string()); 456 HandleMark hm(thread); 457 ThreadToNativeFromVM ttn(thread); 458 JNIEnv *env = thread->jni_environment(); 459 bool is_copy; 460 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 461 assert(is_copy == JNI_TRUE, "is_copy value changed"); 462 } 463 464 // Uses a store barrier and therefore needs to be in vm state 465 JNIHandles::destroy_local(js); 466 467 return native_platform_string; 468 } 469 470 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) { 471 ResourceMark rm(THREAD); 472 return create_from_str(java_name->as_klass_external_name(), THREAD); 473 } 474 475 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 476 jchar* result = as_unicode_string_or_null(java_string, length); 477 if (result == nullptr) { 478 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 479 } 480 return result; 481 } 482 483 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) { 484 typeArrayOop value = java_lang_String::value(java_string); 485 length = java_lang_String::length(java_string, value); 486 bool is_latin1 = java_lang_String::is_latin1(java_string); 487 488 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 489 if (result != nullptr) { 490 if (!is_latin1) { 491 for (int index = 0; index < length; index++) { 492 result[index] = value->char_at(index); 493 } 494 } else { 495 for (int index = 0; index < length; index++) { 496 result[index] = ((jchar) value->byte_at(index)) & 0xff; 497 } 498 } 499 } 500 return result; 501 } 502 503 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) { 504 // The hash and hashIsZero fields are subject to a benign data race, 505 // making it crucial to ensure that any observable result of the 506 // calculation in this method stays correct under any possible read of 507 // these fields. Necessary restrictions to allow this to be correct 508 // without explicit memory fences or similar concurrency primitives is 509 // that we can ever only write to one of these two fields for a given 510 // String instance, and that the computation is idempotent and derived 511 // from immutable state 512 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized"); 513 if (java_lang_String::hash_is_set(java_string)) { 514 return java_string->int_field(_hash_offset); 515 } 516 517 typeArrayOop value = java_lang_String::value(java_string); 518 int length = java_lang_String::length(java_string, value); 519 bool is_latin1 = java_lang_String::is_latin1(java_string); 520 521 unsigned int hash = 0; 522 if (length > 0) { 523 if (is_latin1) { 524 hash = java_lang_String::hash_code(value->byte_at_addr(0), length); 525 } else { 526 hash = java_lang_String::hash_code(value->char_at_addr(0), length); 527 } 528 } 529 530 if (update) { 531 if (hash != 0) { 532 java_string->int_field_put(_hash_offset, hash); 533 } else { 534 java_string->bool_field_put(_hashIsZero_offset, true); 535 } 536 } 537 return hash; 538 } 539 540 unsigned int java_lang_String::hash_code(oop java_string) { 541 return hash_code_impl(java_string, /*update=*/true); 542 } 543 544 unsigned int java_lang_String::hash_code_noupdate(oop java_string) { 545 return hash_code_impl(java_string, /*update=*/false); 546 } 547 548 549 char* java_lang_String::as_quoted_ascii(oop java_string) { 550 typeArrayOop value = java_lang_String::value(java_string); 551 int length = java_lang_String::length(java_string, value); 552 bool is_latin1 = java_lang_String::is_latin1(java_string); 553 554 if (length == 0) return nullptr; 555 556 char* result; 557 int result_length; 558 if (!is_latin1) { 559 jchar* base = value->char_at_addr(0); 560 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 561 result = NEW_RESOURCE_ARRAY(char, result_length); 562 UNICODE::as_quoted_ascii(base, length, result, result_length); 563 } else { 564 jbyte* base = value->byte_at_addr(0); 565 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 566 result = NEW_RESOURCE_ARRAY(char, result_length); 567 UNICODE::as_quoted_ascii(base, length, result, result_length); 568 } 569 assert(result_length >= length + 1, "must not be shorter"); 570 assert(result_length == (int)strlen(result) + 1, "must match"); 571 return result; 572 } 573 574 Symbol* java_lang_String::as_symbol(oop java_string) { 575 typeArrayOop value = java_lang_String::value(java_string); 576 int length = java_lang_String::length(java_string, value); 577 bool is_latin1 = java_lang_String::is_latin1(java_string); 578 if (!is_latin1) { 579 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0); 580 Symbol* sym = SymbolTable::new_symbol(base, length); 581 return sym; 582 } else { 583 ResourceMark rm; 584 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 585 const char* base = UNICODE::as_utf8(position, length); 586 Symbol* sym = SymbolTable::new_symbol(base, length); 587 return sym; 588 } 589 } 590 591 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 592 typeArrayOop value = java_lang_String::value(java_string); 593 int length = java_lang_String::length(java_string, value); 594 bool is_latin1 = java_lang_String::is_latin1(java_string); 595 if (!is_latin1) { 596 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0); 597 return SymbolTable::probe_unicode(base, length); 598 } else { 599 ResourceMark rm; 600 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 601 const char* base = UNICODE::as_utf8(position, length); 602 return SymbolTable::probe(base, length); 603 } 604 } 605 606 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) { 607 assert(value_equals(value, java_lang_String::value(java_string)), 608 "value must be same as java_lang_String::value(java_string)"); 609 int length = java_lang_String::length(java_string, value); 610 if (length == 0) { 611 return 0; 612 } 613 if (!java_lang_String::is_latin1(java_string)) { 614 return UNICODE::utf8_length(value->char_at_addr(0), length); 615 } else { 616 return UNICODE::utf8_length(value->byte_at_addr(0), length); 617 } 618 } 619 620 int java_lang_String::utf8_length(oop java_string) { 621 typeArrayOop value = java_lang_String::value(java_string); 622 return utf8_length(java_string, value); 623 } 624 625 char* java_lang_String::as_utf8_string(oop java_string) { 626 int length; 627 return as_utf8_string(java_string, length); 628 } 629 630 char* java_lang_String::as_utf8_string(oop java_string, int& length) { 631 typeArrayOop value = java_lang_String::value(java_string); 632 length = java_lang_String::length(java_string, value); 633 bool is_latin1 = java_lang_String::is_latin1(java_string); 634 if (!is_latin1) { 635 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0); 636 return UNICODE::as_utf8(position, length); 637 } else { 638 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 639 return UNICODE::as_utf8(position, length); 640 } 641 } 642 643 // Uses a provided buffer if it's sufficiently large, otherwise allocates 644 // a resource array to fit 645 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, int buflen, int& utf8_len) { 646 typeArrayOop value = java_lang_String::value(java_string); 647 int len = java_lang_String::length(java_string, value); 648 bool is_latin1 = java_lang_String::is_latin1(java_string); 649 if (!is_latin1) { 650 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0); 651 utf8_len = UNICODE::utf8_length(position, len); 652 if (utf8_len >= buflen) { 653 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 654 } 655 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 656 } else { 657 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0); 658 utf8_len = UNICODE::utf8_length(position, len); 659 if (utf8_len >= buflen) { 660 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 661 } 662 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 663 } 664 } 665 666 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) { 667 assert(value_equals(value, java_lang_String::value(java_string)), 668 "value must be same as java_lang_String::value(java_string)"); 669 int length = java_lang_String::length(java_string, value); 670 bool is_latin1 = java_lang_String::is_latin1(java_string); 671 if (!is_latin1) { 672 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0); 673 return UNICODE::as_utf8(position, length, buf, buflen); 674 } else { 675 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 676 return UNICODE::as_utf8(position, length, buf, buflen); 677 } 678 } 679 680 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 681 typeArrayOop value = java_lang_String::value(java_string); 682 return as_utf8_string(java_string, value, buf, buflen); 683 } 684 685 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 686 typeArrayOop value = java_lang_String::value(java_string); 687 bool is_latin1 = java_lang_String::is_latin1(java_string); 688 assert(start + len <= java_lang_String::length(java_string), "just checking"); 689 if (!is_latin1) { 690 jchar* position = value->char_at_addr(start); 691 return UNICODE::as_utf8(position, len); 692 } else { 693 jbyte* position = value->byte_at_addr(start); 694 return UNICODE::as_utf8(position, len); 695 } 696 } 697 698 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) { 699 assert(value_equals(value, java_lang_String::value(java_string)), 700 "value must be same as java_lang_String::value(java_string)"); 701 assert(start + len <= java_lang_String::length(java_string), "just checking"); 702 bool is_latin1 = java_lang_String::is_latin1(java_string); 703 if (!is_latin1) { 704 jchar* position = value->char_at_addr(start); 705 return UNICODE::as_utf8(position, len, buf, buflen); 706 } else { 707 jbyte* position = value->byte_at_addr(start); 708 return UNICODE::as_utf8(position, len, buf, buflen); 709 } 710 } 711 712 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) { 713 assert(java_string->klass() == vmClasses::String_klass(), 714 "must be java_string"); 715 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 716 int length = java_lang_String::length(java_string, value); 717 if (length != len) { 718 return false; 719 } 720 bool is_latin1 = java_lang_String::is_latin1(java_string); 721 if (!is_latin1) { 722 for (int i = 0; i < len; i++) { 723 if (value->char_at(i) != chars[i]) { 724 return false; 725 } 726 } 727 } else { 728 for (int i = 0; i < len; i++) { 729 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 730 return false; 731 } 732 } 733 } 734 return true; 735 } 736 737 bool java_lang_String::equals(oop str1, oop str2) { 738 assert(str1->klass() == vmClasses::String_klass(), 739 "must be java String"); 740 assert(str2->klass() == vmClasses::String_klass(), 741 "must be java String"); 742 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1); 743 bool is_latin1 = java_lang_String::is_latin1(str1); 744 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2); 745 bool is_latin2 = java_lang_String::is_latin1(str2); 746 747 if (is_latin1 != is_latin2) { 748 // Strings with different coders are never equal. 749 return false; 750 } 751 return value_equals(value1, value2); 752 } 753 754 void java_lang_String::print(oop java_string, outputStream* st) { 755 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string"); 756 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 757 758 if (value == nullptr) { 759 // This can happen if, e.g., printing a String 760 // object before its initializer has been called 761 st->print("nullptr"); 762 return; 763 } 764 765 int length = java_lang_String::length(java_string, value); 766 bool is_latin1 = java_lang_String::is_latin1(java_string); 767 768 st->print("\""); 769 for (int index = 0; index < length; index++) { 770 jchar c = (!is_latin1) ? value->char_at(index) : 771 ((jchar) value->byte_at(index)) & 0xff; 772 if (c < ' ') { 773 st->print("\\x%02X", c); // print control characters e.g. \x0A 774 } else { 775 st->print("%c", c); 776 } 777 } 778 st->print("\""); 779 } 780 781 // java_lang_Class 782 783 int java_lang_Class::_klass_offset; 784 int java_lang_Class::_array_klass_offset; 785 int java_lang_Class::_oop_size_offset; 786 int java_lang_Class::_static_oop_field_count_offset; 787 int java_lang_Class::_class_loader_offset; 788 int java_lang_Class::_module_offset; 789 int java_lang_Class::_protection_domain_offset; 790 int java_lang_Class::_component_mirror_offset; 791 int java_lang_Class::_signers_offset; 792 int java_lang_Class::_name_offset; 793 int java_lang_Class::_source_file_offset; 794 int java_lang_Class::_classData_offset; 795 int java_lang_Class::_classRedefinedCount_offset; 796 797 bool java_lang_Class::_offsets_computed = false; 798 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr; 799 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr; 800 801 #ifdef ASSERT 802 inline static void assert_valid_static_string_field(fieldDescriptor* fd) { 803 assert(fd->has_initial_value(), "caller should have checked this"); 804 assert(fd->field_type() == T_OBJECT, "caller should have checked this"); 805 assert(fd->signature() == vmSymbols::string_signature(), "just checking"); 806 } 807 #endif 808 809 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 810 DEBUG_ONLY(assert_valid_static_string_field(fd);) 811 oop string = fd->string_initial_value(CHECK); 812 mirror()->obj_field_put(fd->offset(), string); 813 } 814 815 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) { 816 assert(fd->has_initial_value(), "caller should have checked this"); 817 BasicType t = fd->field_type(); 818 switch (t) { 819 case T_BYTE: 820 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value())); 821 break; 822 case T_BOOLEAN: 823 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value())); 824 break; 825 case T_CHAR: 826 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value())); 827 break; 828 case T_SHORT: 829 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value())); 830 break; 831 case T_INT: 832 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 833 break; 834 case T_FLOAT: 835 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 836 break; 837 case T_DOUBLE: 838 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 839 break; 840 case T_LONG: 841 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 842 break; 843 default: 844 // Illegal ConstantValue attribute in class file should have been 845 // caught during classfile parsing. 846 ShouldNotReachHere(); 847 } 848 } 849 850 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 851 assert(mirror.not_null() && fd->is_static(), "just checking"); 852 if (fd->has_initial_value()) { 853 if (fd->field_type() != T_OBJECT) { 854 initialize_static_primitive_field(fd, mirror); 855 } else { 856 initialize_static_string_field(fd, mirror, CHECK); 857 } 858 } 859 } 860 861 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 862 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 863 864 // If the offset was read from the shared archive, it was fixed up already 865 if (!k->is_shared()) { 866 if (k->is_instance_klass()) { 867 // During bootstrap, java.lang.Class wasn't loaded so static field 868 // offsets were computed without the size added it. Go back and 869 // update all the static field offsets to included the size. 870 871 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow 872 // content updates. So the FieldInfo stream has to be decompressed into a temporary array, 873 // static fields offsets are updated in this array before reencoding everything into 874 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream. 875 876 int java_fields; 877 int injected_fields; 878 InstanceKlass* ik = InstanceKlass::cast(k); 879 GrowableArray<FieldInfo>* fields = 880 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(), 881 &java_fields, &injected_fields); 882 for (int i = 0; i < fields->length(); i++) { 883 FieldInfo* fi = fields->adr_at(i); 884 if (fi->access_flags().is_static()) { 885 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields()); 886 } 887 } 888 Array<u1>* old_stream = ik->fieldinfo_stream(); 889 assert(fields->length() == (java_fields + injected_fields), "Must be"); 890 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK); 891 ik->set_fieldinfo_stream(new_fis); 892 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream); 893 } 894 } 895 896 if (k->is_shared() && k->has_archived_mirror_index()) { 897 if (ArchiveHeapLoader::is_in_use()) { 898 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK); 899 assert(present, "Missing archived mirror for %s", k->external_name()); 900 return; 901 } else { 902 k->clear_java_mirror_handle(); 903 k->clear_archived_mirror_index(); 904 } 905 } 906 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK); 907 } 908 909 void java_lang_Class::initialize_mirror_fields(Klass* k, 910 Handle mirror, 911 Handle protection_domain, 912 Handle classData, 913 TRAPS) { 914 // Set protection domain also 915 set_protection_domain(mirror(), protection_domain()); 916 917 // Initialize static fields 918 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 919 920 // Set classData 921 set_class_data(mirror(), classData()); 922 } 923 924 // Set the java.lang.Module module field in the java_lang_Class mirror 925 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) { 926 if (module.is_null()) { 927 // During startup, the module may be null only if java.base has not been defined yet. 928 // Put the class on the fixup_module_list to patch later when the java.lang.Module 929 // for java.base is known. But note that since we captured the null module another 930 // thread may have completed that initialization. 931 932 bool javabase_was_defined = false; 933 { 934 MutexLocker m1(current, Module_lock); 935 // Keep list of classes needing java.base module fixup 936 if (!ModuleEntryTable::javabase_defined()) { 937 assert(k->java_mirror() != nullptr, "Class's mirror is null"); 938 k->class_loader_data()->inc_keep_alive(); 939 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized"); 940 fixup_module_field_list()->push(k); 941 } else { 942 javabase_was_defined = true; 943 } 944 } 945 946 // If java.base was already defined then patch this particular class with java.base. 947 if (javabase_was_defined) { 948 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 949 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr, 950 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 951 Handle javabase_handle(current, javabase_entry->module()); 952 set_module(mirror(), javabase_handle()); 953 } 954 } else { 955 assert(Universe::is_module_initialized() || 956 (ModuleEntryTable::javabase_defined() && 957 (module() == ModuleEntryTable::javabase_moduleEntry()->module())), 958 "Incorrect java.lang.Module specification while creating mirror"); 959 set_module(mirror(), module()); 960 } 961 } 962 963 // Statically allocate fixup lists because they always get created. 964 void java_lang_Class::allocate_fixup_lists() { 965 GrowableArray<Klass*>* mirror_list = 966 new (mtClass) GrowableArray<Klass*>(40, mtClass); 967 set_fixup_mirror_list(mirror_list); 968 969 GrowableArray<Klass*>* module_list = 970 new (mtModule) GrowableArray<Klass*>(500, mtModule); 971 set_fixup_module_field_list(module_list); 972 } 973 974 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData, 975 Handle& mirror, Handle& comp_mirror, TRAPS) { 976 // Allocate mirror (java.lang.Class instance) 977 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK); 978 mirror = Handle(THREAD, mirror_oop); 979 980 // Setup indirection from mirror->klass 981 set_klass(mirror(), k); 982 983 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 984 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 985 986 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 987 988 // It might also have a component mirror. This mirror must already exist. 989 if (k->is_array_klass()) { 990 if (k->is_typeArray_klass()) { 991 BasicType type = TypeArrayKlass::cast(k)->element_type(); 992 if (is_scratch) { 993 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type)); 994 } else { 995 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 996 } 997 } else { 998 assert(k->is_objArray_klass(), "Must be"); 999 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1000 assert(element_klass != nullptr, "Must have an element klass"); 1001 if (is_scratch) { 1002 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass)); 1003 } else { 1004 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 1005 } 1006 } 1007 assert(comp_mirror() != nullptr, "must have a mirror"); 1008 1009 // Two-way link between the array klass and its component mirror: 1010 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 1011 set_component_mirror(mirror(), comp_mirror()); 1012 // See below for ordering dependencies between field array_klass in component mirror 1013 // and java_mirror in this klass. 1014 } else { 1015 assert(k->is_instance_klass(), "Must be"); 1016 1017 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD); 1018 if (HAS_PENDING_EXCEPTION) { 1019 // If any of the fields throws an exception like OOM remove the klass field 1020 // from the mirror so GC doesn't follow it after the klass has been deallocated. 1021 // This mirror looks like a primitive type, which logically it is because it 1022 // it represents no class. 1023 set_klass(mirror(), nullptr); 1024 return; 1025 } 1026 } 1027 } 1028 1029 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 1030 Handle module, Handle protection_domain, 1031 Handle classData, TRAPS) { 1032 assert(k != nullptr, "Use create_basic_type_mirror for primitive types"); 1033 assert(k->java_mirror() == nullptr, "should only assign mirror once"); 1034 1035 // Use this moment of initialization to cache modifier_flags also, 1036 // to support Class.getModifiers(). Instance classes recalculate 1037 // the cached flags after the class file is parsed, but before the 1038 // class is put into the system dictionary. 1039 int computed_modifiers = k->compute_modifier_flags(); 1040 k->set_modifier_flags(computed_modifiers); 1041 // Class_klass has to be loaded because it is used to allocate 1042 // the mirror. 1043 if (vmClasses::Class_klass_loaded()) { 1044 Handle mirror; 1045 Handle comp_mirror; 1046 1047 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK); 1048 1049 // set the classLoader field in the java_lang_Class instance 1050 assert(class_loader() == k->class_loader(), "should be same"); 1051 set_class_loader(mirror(), class_loader()); 1052 1053 // Setup indirection from klass->mirror 1054 // after any exceptions can happen during allocations. 1055 k->set_java_mirror(mirror); 1056 1057 // Set the module field in the java_lang_Class instance. This must be done 1058 // after the mirror is set. 1059 set_mirror_module_field(THREAD, k, mirror, module); 1060 1061 if (comp_mirror() != nullptr) { 1062 // Set after k->java_mirror() is published, because compiled code running 1063 // concurrently doesn't expect a k to have a null java_mirror. 1064 release_set_array_klass(comp_mirror(), k); 1065 } 1066 if (CDSConfig::is_dumping_heap()) { 1067 create_scratch_mirror(k, CHECK); 1068 } 1069 } else { 1070 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized"); 1071 fixup_mirror_list()->push(k); 1072 } 1073 } 1074 1075 #if INCLUDE_CDS_JAVA_HEAP 1076 // The "scratch mirror" stores the states of the mirror object that can be 1077 // decided at dump time (such as the initial values of the static fields, the 1078 // component mirror, etc). At runtime, more information is added to it by 1079 // java_lang_Class::restore_archived_mirror(). 1080 // 1081 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror() 1082 // produces the same result as /*runtime*/create_mirror(). 1083 // 1084 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the 1085 // latter may contain dumptime-specific information that cannot be archived 1086 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution). 1087 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) { 1088 if (k->class_loader() != nullptr && 1089 k->class_loader() != SystemDictionary::java_platform_loader() && 1090 k->class_loader() != SystemDictionary::java_system_loader()) { 1091 // We only archive the mirrors of classes loaded by the built-in loaders 1092 return; 1093 } 1094 1095 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime 1096 Handle mirror; 1097 Handle comp_mirror; 1098 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK); 1099 1100 if (comp_mirror() != nullptr) { 1101 release_set_array_klass(comp_mirror(), k); 1102 } 1103 1104 HeapShared::set_scratch_java_mirror(k, mirror()); 1105 } 1106 1107 // Returns true if the mirror is updated, false if no archived mirror 1108 // data is present. After the archived mirror object is restored, the 1109 // shared klass' _has_raw_archived_mirror flag is cleared. 1110 bool java_lang_Class::restore_archived_mirror(Klass *k, 1111 Handle class_loader, Handle module, 1112 Handle protection_domain, TRAPS) { 1113 // Postpone restoring archived mirror until java.lang.Class is loaded. Please 1114 // see more details in vmClasses::resolve_all(). 1115 if (!vmClasses::Class_klass_loaded()) { 1116 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized"); 1117 fixup_mirror_list()->push(k); 1118 return true; 1119 } 1120 1121 oop m = k->archived_java_mirror(); 1122 assert(m != nullptr, "must have stored non-null archived mirror"); 1123 1124 // Sanity: clear it now to prevent re-initialization if any of the following fails 1125 k->clear_archived_mirror_index(); 1126 1127 // mirror is archived, restore 1128 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m)); 1129 assert(as_Klass(m) == k, "must be"); 1130 Handle mirror(THREAD, m); 1131 1132 if (!k->is_array_klass()) { 1133 // - local static final fields with initial values were initialized at dump time 1134 1135 if (protection_domain.not_null()) { 1136 set_protection_domain(mirror(), protection_domain()); 1137 } 1138 } 1139 1140 assert(class_loader() == k->class_loader(), "should be same"); 1141 if (class_loader.not_null()) { 1142 set_class_loader(mirror(), class_loader()); 1143 } 1144 1145 k->set_java_mirror(mirror); 1146 1147 set_mirror_module_field(THREAD, k, mirror, module); 1148 1149 if (log_is_enabled(Trace, cds, heap, mirror)) { 1150 ResourceMark rm(THREAD); 1151 log_trace(cds, heap, mirror)( 1152 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1153 } 1154 1155 return true; 1156 } 1157 #endif // INCLUDE_CDS_JAVA_HEAP 1158 1159 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1160 assert(_module_offset != 0, "must have been computed already"); 1161 set_module(k->java_mirror(), module()); 1162 } 1163 1164 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) { 1165 assert(_oop_size_offset != 0, "must be set"); 1166 assert(size > 0, "Oop size must be greater than zero, not " SIZE_FORMAT, size); 1167 assert(size <= INT_MAX, "Lossy conversion: " SIZE_FORMAT, size); 1168 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size; 1169 } 1170 1171 int java_lang_Class::static_oop_field_count(oop java_class) { 1172 assert(_static_oop_field_count_offset != 0, "must be set"); 1173 return java_class->int_field(_static_oop_field_count_offset); 1174 } 1175 1176 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1177 assert(_static_oop_field_count_offset != 0, "must be set"); 1178 java_class->int_field_put(_static_oop_field_count_offset, size); 1179 } 1180 1181 oop java_lang_Class::protection_domain(oop java_class) { 1182 assert(_protection_domain_offset != 0, "must be set"); 1183 return java_class->obj_field(_protection_domain_offset); 1184 } 1185 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1186 assert(_protection_domain_offset != 0, "must be set"); 1187 java_class->obj_field_put(_protection_domain_offset, pd); 1188 } 1189 1190 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1191 assert(_component_mirror_offset != 0, "must be set"); 1192 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1193 } 1194 oop java_lang_Class::component_mirror(oop java_class) { 1195 assert(_component_mirror_offset != 0, "must be set"); 1196 return java_class->obj_field(_component_mirror_offset); 1197 } 1198 1199 objArrayOop java_lang_Class::signers(oop java_class) { 1200 assert(_signers_offset != 0, "must be set"); 1201 return (objArrayOop)java_class->obj_field(_signers_offset); 1202 } 1203 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 1204 assert(_signers_offset != 0, "must be set"); 1205 java_class->obj_field_put(_signers_offset, signers); 1206 } 1207 1208 oop java_lang_Class::class_data(oop java_class) { 1209 assert(_classData_offset != 0, "must be set"); 1210 return java_class->obj_field(_classData_offset); 1211 } 1212 void java_lang_Class::set_class_data(oop java_class, oop class_data) { 1213 assert(_classData_offset != 0, "must be set"); 1214 java_class->obj_field_put(_classData_offset, class_data); 1215 } 1216 1217 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1218 assert(_class_loader_offset != 0, "offsets should have been initialized"); 1219 java_class->obj_field_put(_class_loader_offset, loader); 1220 } 1221 1222 oop java_lang_Class::class_loader(oop java_class) { 1223 assert(_class_loader_offset != 0, "must be set"); 1224 return java_class->obj_field(_class_loader_offset); 1225 } 1226 1227 oop java_lang_Class::module(oop java_class) { 1228 assert(_module_offset != 0, "must be set"); 1229 return java_class->obj_field(_module_offset); 1230 } 1231 1232 void java_lang_Class::set_module(oop java_class, oop module) { 1233 assert(_module_offset != 0, "must be set"); 1234 java_class->obj_field_put(_module_offset, module); 1235 } 1236 1237 oop java_lang_Class::name(Handle java_class, TRAPS) { 1238 assert(_name_offset != 0, "must be set"); 1239 oop o = java_class->obj_field(_name_offset); 1240 if (o == nullptr) { 1241 o = StringTable::intern(as_external_name(java_class()), THREAD); 1242 java_class->obj_field_put(_name_offset, o); 1243 } 1244 return o; 1245 } 1246 1247 oop java_lang_Class::source_file(oop java_class) { 1248 assert(_source_file_offset != 0, "must be set"); 1249 return java_class->obj_field(_source_file_offset); 1250 } 1251 1252 void java_lang_Class::set_source_file(oop java_class, oop source_file) { 1253 assert(_source_file_offset != 0, "must be set"); 1254 java_class->obj_field_put(_source_file_offset, source_file); 1255 } 1256 1257 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1258 // This should be improved by adding a field at the Java level or by 1259 // introducing a new VM klass (see comment in ClassFileParser) 1260 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL); 1261 if (type != T_VOID) { 1262 Klass* aklass = Universe::typeArrayKlassObj(type); 1263 assert(aklass != nullptr, "correct bootstrap"); 1264 release_set_array_klass(java_class, aklass); 1265 } 1266 #ifdef ASSERT 1267 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass()); 1268 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1269 #endif 1270 return java_class; 1271 } 1272 1273 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1274 assert(is_instance(java_class), "must be a Class object"); 1275 java_class->metadata_field_put(_klass_offset, klass); 1276 } 1277 1278 1279 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1280 assert(is_instance(java_class), "must be a Class object"); 1281 Symbol* name = nullptr; 1282 bool is_instance = false; 1283 if (is_primitive(java_class)) { 1284 name = vmSymbols::type_signature(primitive_type(java_class)); 1285 } else { 1286 Klass* k = as_Klass(java_class); 1287 is_instance = k->is_instance_klass(); 1288 name = k->name(); 1289 } 1290 if (name == nullptr) { 1291 st->print("<null>"); 1292 return; 1293 } 1294 if (is_instance) st->print("L"); 1295 st->write((char*) name->base(), (int) name->utf8_length()); 1296 if (is_instance) st->print(";"); 1297 } 1298 1299 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) { 1300 assert(is_instance(java_class), "must be a Class object"); 1301 Symbol* name; 1302 if (is_primitive(java_class)) { 1303 name = vmSymbols::type_signature(primitive_type(java_class)); 1304 // Because this can create a new symbol, the caller has to decrement 1305 // the refcount, so make adjustment here and below for symbols returned 1306 // that are not created or incremented due to a successful lookup. 1307 name->increment_refcount(); 1308 } else { 1309 Klass* k = as_Klass(java_class); 1310 if (!k->is_instance_klass()) { 1311 name = k->name(); 1312 name->increment_refcount(); 1313 } else { 1314 ResourceMark rm; 1315 const char* sigstr = k->signature_name(); 1316 int siglen = (int) strlen(sigstr); 1317 if (!intern_if_not_found) { 1318 name = SymbolTable::probe(sigstr, siglen); 1319 } else { 1320 name = SymbolTable::new_symbol(sigstr, siglen); 1321 } 1322 } 1323 } 1324 return name; 1325 } 1326 1327 // Returns the Java name for this Java mirror (Resource allocated) 1328 // See Klass::external_name(). 1329 // For primitive type Java mirrors, its type name is returned. 1330 const char* java_lang_Class::as_external_name(oop java_class) { 1331 assert(is_instance(java_class), "must be a Class object"); 1332 const char* name = nullptr; 1333 if (is_primitive(java_class)) { 1334 name = type2name(primitive_type(java_class)); 1335 } else { 1336 name = as_Klass(java_class)->external_name(); 1337 } 1338 if (name == nullptr) { 1339 name = "<null>"; 1340 } 1341 return name; 1342 } 1343 1344 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1345 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1346 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass"); 1347 return k; 1348 } 1349 1350 1351 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1352 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1353 java_class->release_metadata_field_put(_array_klass_offset, klass); 1354 } 1355 1356 1357 BasicType java_lang_Class::primitive_type(oop java_class) { 1358 assert(is_primitive(java_class), "just checking"); 1359 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1360 BasicType type = T_VOID; 1361 if (ak != nullptr) { 1362 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1363 type = ArrayKlass::cast(ak)->element_type(); 1364 } else { 1365 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1366 } 1367 #ifdef ASSERT 1368 if (CDSConfig::is_dumping_heap()) { 1369 oop mirror = Universe::java_mirror(type); 1370 oop scratch_mirror = HeapShared::scratch_java_mirror(type); 1371 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent"); 1372 } else { 1373 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1374 } 1375 #endif 1376 return type; 1377 } 1378 1379 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1380 assert(is_instance(java_class), "must be a Class object"); 1381 if (is_primitive(java_class)) { 1382 if (reference_klass != nullptr) 1383 (*reference_klass) = nullptr; 1384 return primitive_type(java_class); 1385 } else { 1386 if (reference_klass != nullptr) 1387 (*reference_klass) = as_Klass(java_class); 1388 return T_OBJECT; 1389 } 1390 } 1391 1392 1393 oop java_lang_Class::primitive_mirror(BasicType t) { 1394 oop mirror = Universe::java_mirror(t); 1395 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class"); 1396 assert(is_primitive(mirror), "must be primitive"); 1397 return mirror; 1398 } 1399 1400 #define CLASS_FIELDS_DO(macro) \ 1401 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \ 1402 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1403 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1404 macro(_module_offset, k, "module", module_signature, false); \ 1405 macro(_name_offset, k, "name", string_signature, false); \ 1406 macro(_classData_offset, k, "classData", object_signature, false); 1407 1408 void java_lang_Class::compute_offsets() { 1409 if (_offsets_computed) { 1410 return; 1411 } 1412 1413 _offsets_computed = true; 1414 1415 InstanceKlass* k = vmClasses::Class_klass(); 1416 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1417 1418 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1419 } 1420 1421 #if INCLUDE_CDS 1422 void java_lang_Class::serialize_offsets(SerializeClosure* f) { 1423 f->do_bool(&_offsets_computed); 1424 1425 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1426 1427 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1428 } 1429 #endif 1430 1431 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1432 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1433 return the_class_mirror->int_field(_classRedefinedCount_offset); 1434 } 1435 1436 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1437 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1438 the_class_mirror->int_field_put(_classRedefinedCount_offset, value); 1439 } 1440 1441 1442 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1443 // platform thread structure, and a eetop offset which was used for thread 1444 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1445 // merged, so in the HotSpot VM we just use the eetop field for the thread 1446 // instead of the privateInfo_offset. 1447 // 1448 // Note: The stackSize field is only present starting in 1.4. 1449 1450 int java_lang_Thread_FieldHolder::_group_offset; 1451 int java_lang_Thread_FieldHolder::_priority_offset; 1452 int java_lang_Thread_FieldHolder::_stackSize_offset; 1453 int java_lang_Thread_FieldHolder::_daemon_offset; 1454 int java_lang_Thread_FieldHolder::_thread_status_offset; 1455 1456 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \ 1457 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1458 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1459 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1460 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1461 macro(_thread_status_offset, k, "threadStatus", int_signature, false) 1462 1463 void java_lang_Thread_FieldHolder::compute_offsets() { 1464 assert(_group_offset == 0, "offsets should be initialized only once"); 1465 1466 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass(); 1467 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1468 } 1469 1470 #if INCLUDE_CDS 1471 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) { 1472 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1473 } 1474 #endif 1475 1476 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) { 1477 return holder->obj_field(_group_offset); 1478 } 1479 1480 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) { 1481 return (ThreadPriority)holder->int_field(_priority_offset); 1482 } 1483 1484 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) { 1485 holder->int_field_put(_priority_offset, priority); 1486 } 1487 1488 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) { 1489 return holder->long_field(_stackSize_offset); 1490 } 1491 1492 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) { 1493 return holder->bool_field(_daemon_offset) != 0; 1494 } 1495 1496 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) { 1497 assert(val, "daemon status is never turned off"); 1498 holder->bool_field_put(_daemon_offset, val); 1499 } 1500 1501 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) { 1502 holder->int_field_put(_thread_status_offset, static_cast<int>(status)); 1503 } 1504 1505 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) { 1506 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset)); 1507 } 1508 1509 1510 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0; 1511 1512 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \ 1513 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true); 1514 1515 void java_lang_Thread_Constants::compute_offsets() { 1516 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once"); 1517 1518 InstanceKlass* k = vmClasses::Thread_Constants_klass(); 1519 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1520 } 1521 1522 #if INCLUDE_CDS 1523 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) { 1524 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1525 } 1526 #endif 1527 1528 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() { 1529 InstanceKlass* k = vmClasses::Thread_Constants_klass(); 1530 oop base = k->static_field_base_raw(); 1531 return base->obj_field(_static_VTHREAD_GROUP_offset); 1532 } 1533 1534 1535 int java_lang_Thread::_holder_offset; 1536 int java_lang_Thread::_name_offset; 1537 int java_lang_Thread::_contextClassLoader_offset; 1538 int java_lang_Thread::_inheritedAccessControlContext_offset; 1539 int java_lang_Thread::_eetop_offset; 1540 int java_lang_Thread::_jvmti_thread_state_offset; 1541 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset; 1542 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset; 1543 int java_lang_Thread::_interrupted_offset; 1544 int java_lang_Thread::_interruptLock_offset; 1545 int java_lang_Thread::_tid_offset; 1546 int java_lang_Thread::_continuation_offset; 1547 int java_lang_Thread::_park_blocker_offset; 1548 int java_lang_Thread::_scopedValueBindings_offset; 1549 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;) 1550 1551 #define THREAD_FIELDS_DO(macro) \ 1552 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \ 1553 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1554 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \ 1555 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \ 1556 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1557 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \ 1558 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \ 1559 macro(_tid_offset, k, "tid", long_signature, false); \ 1560 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \ 1561 macro(_continuation_offset, k, "cont", continuation_signature, false); \ 1562 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false); 1563 1564 void java_lang_Thread::compute_offsets() { 1565 assert(_holder_offset == 0, "offsets should be initialized only once"); 1566 1567 InstanceKlass* k = vmClasses::Thread_klass(); 1568 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1569 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1570 } 1571 1572 #if INCLUDE_CDS 1573 void java_lang_Thread::serialize_offsets(SerializeClosure* f) { 1574 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1575 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1576 } 1577 #endif 1578 1579 JavaThread* java_lang_Thread::thread(oop java_thread) { 1580 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset)); 1581 } 1582 1583 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) { 1584 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset)); 1585 } 1586 1587 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1588 java_thread->address_field_put(_eetop_offset, (address)thread); 1589 } 1590 1591 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) { 1592 java_thread->release_address_field_put(_eetop_offset, (address)thread); 1593 } 1594 1595 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) { 1596 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset); 1597 } 1598 1599 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) { 1600 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state); 1601 } 1602 1603 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) { 1604 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset); 1605 } 1606 1607 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) { 1608 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked"); 1609 int val = VTMS_transition_disable_count(java_thread); 1610 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1); 1611 } 1612 1613 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) { 1614 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked"); 1615 int val = VTMS_transition_disable_count(java_thread); 1616 assert(val > 0, "VTMS_transition_disable_count should never be negative"); 1617 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1); 1618 } 1619 1620 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) { 1621 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset); 1622 } 1623 1624 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) { 1625 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val); 1626 } 1627 1628 int java_lang_Thread::is_in_VTMS_transition_offset() { 1629 return _jvmti_is_in_VTMS_transition_offset; 1630 } 1631 1632 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) { 1633 assert(java_thread != nullptr, "need a java_lang_Thread pointer here"); 1634 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr); 1635 } 1636 1637 oop java_lang_Thread::holder(oop java_thread) { 1638 // Note: may return null if the thread is still attaching 1639 return java_thread->obj_field(_holder_offset); 1640 } 1641 oop java_lang_Thread::interrupt_lock(oop java_thread) { 1642 return java_thread->obj_field(_interruptLock_offset); 1643 } 1644 1645 bool java_lang_Thread::interrupted(oop java_thread) { 1646 // Make sure the caller can safely access oops. 1647 assert(Thread::current()->is_VM_thread() || 1648 (JavaThread::current()->thread_state() != _thread_blocked && 1649 JavaThread::current()->thread_state() != _thread_in_native), 1650 "Unsafe access to oop"); 1651 return java_thread->bool_field_volatile(_interrupted_offset); 1652 } 1653 1654 void java_lang_Thread::set_interrupted(oop java_thread, bool val) { 1655 // Make sure the caller can safely access oops. 1656 assert(Thread::current()->is_VM_thread() || 1657 (JavaThread::current()->thread_state() != _thread_blocked && 1658 JavaThread::current()->thread_state() != _thread_in_native), 1659 "Unsafe access to oop"); 1660 java_thread->bool_field_put_volatile(_interrupted_offset, val); 1661 } 1662 1663 1664 oop java_lang_Thread::name(oop java_thread) { 1665 return java_thread->obj_field(_name_offset); 1666 } 1667 1668 1669 void java_lang_Thread::set_name(oop java_thread, oop name) { 1670 java_thread->obj_field_put(_name_offset, name); 1671 } 1672 1673 // Convenience macros for setting and getting Thread fields that 1674 // are actually stored in the FieldHolder object of the thread. 1675 // The FieldHolder can be null whilst a thread is attaching via 1676 // JNI, and when the main thread is attaching. 1677 1678 // The default value should be the default/zero initialized value 1679 // of the field as it would be in java.lang.Thread.FieldHolder. 1680 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \ 1681 { \ 1682 oop holder = java_lang_Thread::holder(java_thread); \ 1683 if (holder != nullptr) \ 1684 return java_lang_Thread_FieldHolder::field(holder); \ 1685 else \ 1686 return default_val; \ 1687 } 1688 1689 // We should never be trying to set a field of an attaching thread. 1690 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \ 1691 { \ 1692 oop holder = java_lang_Thread::holder(java_thread); \ 1693 assert(holder != nullptr, "Thread not fully initialized"); \ 1694 java_lang_Thread_FieldHolder::set_##field(holder, value); \ 1695 } 1696 1697 1698 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1699 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0); 1700 } 1701 1702 1703 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1704 SET_FIELDHOLDER_FIELD(java_thread, priority, priority) 1705 } 1706 1707 1708 oop java_lang_Thread::threadGroup(oop java_thread) { 1709 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr); 1710 } 1711 1712 1713 bool java_lang_Thread::is_alive(oop java_thread) { 1714 JavaThread* thr = java_lang_Thread::thread(java_thread); 1715 return (thr != nullptr); 1716 } 1717 1718 1719 bool java_lang_Thread::is_daemon(oop java_thread) { 1720 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false); 1721 } 1722 1723 1724 void java_lang_Thread::set_daemon(oop java_thread) { 1725 SET_FIELDHOLDER_FIELD(java_thread, daemon, true); 1726 } 1727 1728 oop java_lang_Thread::context_class_loader(oop java_thread) { 1729 return java_thread->obj_field(_contextClassLoader_offset); 1730 } 1731 1732 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1733 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1734 } 1735 1736 1737 jlong java_lang_Thread::stackSize(oop java_thread) { 1738 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0); 1739 } 1740 1741 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1742 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) { 1743 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status); 1744 } 1745 1746 // Read thread status value from threadStatus field in java.lang.Thread java class. 1747 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1748 // Make sure the caller is operating on behalf of the VM or is 1749 // running VM code (state == _thread_in_vm). 1750 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1751 JavaThread::current()->thread_state() == _thread_in_vm, 1752 "Java Thread is not running in vm"); 1753 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */); 1754 } 1755 1756 ByteSize java_lang_Thread::thread_id_offset() { 1757 return in_ByteSize(_tid_offset); 1758 } 1759 1760 oop java_lang_Thread::park_blocker(oop java_thread) { 1761 return java_thread->obj_field(_park_blocker_offset); 1762 } 1763 1764 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) { 1765 ThreadsListHandle tlh(JavaThread::current()); 1766 JavaThread* thread; 1767 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread); 1768 if (is_virtual) { 1769 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread); 1770 if (carrier_thread == nullptr) { 1771 return nullptr; 1772 } 1773 thread = java_lang_Thread::thread(carrier_thread); 1774 } else { 1775 thread = java_lang_Thread::thread(java_thread); 1776 } 1777 if (thread == nullptr) { 1778 return nullptr; 1779 } 1780 1781 class GetStackTraceClosure : public HandshakeClosure { 1782 public: 1783 const Handle _java_thread; 1784 int _depth; 1785 bool _retry_handshake; 1786 GrowableArray<Method*>* _methods; 1787 GrowableArray<int>* _bcis; 1788 1789 GetStackTraceClosure(Handle java_thread) : 1790 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false), 1791 _methods(nullptr), _bcis(nullptr) { 1792 } 1793 ~GetStackTraceClosure() { 1794 delete _methods; 1795 delete _bcis; 1796 } 1797 1798 bool read_reset_retry() { 1799 bool ret = _retry_handshake; 1800 // If we re-execute the handshake this method need to return false 1801 // when the handshake cannot be performed. (E.g. thread terminating) 1802 _retry_handshake = false; 1803 return ret; 1804 } 1805 1806 void do_thread(Thread* th) { 1807 if (!Thread::current()->is_Java_thread()) { 1808 _retry_handshake = true; 1809 return; 1810 } 1811 1812 JavaThread* thread = JavaThread::cast(th); 1813 1814 if (!thread->has_last_Java_frame()) { 1815 return; 1816 } 1817 1818 bool carrier = false; 1819 if (java_lang_VirtualThread::is_instance(_java_thread())) { 1820 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread 1821 const ContinuationEntry* ce = thread->vthread_continuation(); 1822 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) { 1823 return; // not mounted 1824 } 1825 } else { 1826 carrier = (thread->vthread_continuation() != nullptr); 1827 } 1828 1829 const int max_depth = MaxJavaStackTraceDepth; 1830 const bool skip_hidden = !ShowHiddenFrames; 1831 1832 // Pick minimum length that will cover most cases 1833 int init_length = 64; 1834 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal); 1835 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal); 1836 1837 int total_count = 0; 1838 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops 1839 !vfst.at_end() && (max_depth == 0 || max_depth != total_count); 1840 vfst.next()) { 1841 1842 if (skip_hidden && (vfst.method()->is_hidden() || 1843 vfst.method()->is_continuation_enter_intrinsic())) { 1844 continue; 1845 } 1846 1847 _methods->push(vfst.method()); 1848 _bcis->push(vfst.bci()); 1849 total_count++; 1850 } 1851 1852 _depth = total_count; 1853 } 1854 }; 1855 1856 // Handshake with target 1857 ResourceMark rm(THREAD); 1858 HandleMark hm(THREAD); 1859 GetStackTraceClosure gstc(Handle(THREAD, java_thread)); 1860 do { 1861 Handshake::execute(&gstc, &tlh, thread); 1862 } while (gstc.read_reset_retry()); 1863 1864 // Stop if no stack trace is found. 1865 if (gstc._depth == 0) { 1866 return nullptr; 1867 } 1868 1869 // Convert to StackTraceElement array 1870 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 1871 assert(k != nullptr, "must be loaded in 1.4+"); 1872 if (k->should_be_initialized()) { 1873 k->initialize(CHECK_NULL); 1874 } 1875 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL); 1876 1877 for (int i = 0; i < gstc._depth; i++) { 1878 methodHandle method(THREAD, gstc._methods->at(i)); 1879 oop element = java_lang_StackTraceElement::create(method, 1880 gstc._bcis->at(i), 1881 CHECK_NULL); 1882 trace->obj_at_put(i, element); 1883 } 1884 1885 return trace(); 1886 } 1887 1888 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1889 JavaThreadStatus status = get_thread_status(java_thread); 1890 switch (status) { 1891 case JavaThreadStatus::NEW : return "NEW"; 1892 case JavaThreadStatus::RUNNABLE : return "RUNNABLE"; 1893 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)"; 1894 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1895 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1896 case JavaThreadStatus::PARKED : return "WAITING (parking)"; 1897 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)"; 1898 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1899 case JavaThreadStatus::TERMINATED : return "TERMINATED"; 1900 default : return "UNKNOWN"; 1901 }; 1902 } 1903 int java_lang_ThreadGroup::_parent_offset; 1904 int java_lang_ThreadGroup::_name_offset; 1905 int java_lang_ThreadGroup::_maxPriority_offset; 1906 int java_lang_ThreadGroup::_daemon_offset; 1907 1908 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1909 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1910 return java_thread_group->obj_field(_parent_offset); 1911 } 1912 1913 // ("name as oop" accessor is not necessary) 1914 1915 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1916 oop name = java_thread_group->obj_field(_name_offset); 1917 // ThreadGroup.name can be null 1918 if (name != nullptr) { 1919 return java_lang_String::as_utf8_string(name); 1920 } 1921 return nullptr; 1922 } 1923 1924 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1925 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1926 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1927 } 1928 1929 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1930 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1931 return java_thread_group->bool_field(_daemon_offset) != 0; 1932 } 1933 1934 #define THREADGROUP_FIELDS_DO(macro) \ 1935 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \ 1936 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1937 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \ 1938 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); 1939 1940 void java_lang_ThreadGroup::compute_offsets() { 1941 assert(_parent_offset == 0, "offsets should be initialized only once"); 1942 1943 InstanceKlass* k = vmClasses::ThreadGroup_klass(); 1944 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1945 } 1946 1947 #if INCLUDE_CDS 1948 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) { 1949 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1950 } 1951 #endif 1952 1953 1954 // java_lang_VirtualThread 1955 1956 int java_lang_VirtualThread::static_vthread_scope_offset; 1957 int java_lang_VirtualThread::_carrierThread_offset; 1958 int java_lang_VirtualThread::_continuation_offset; 1959 int java_lang_VirtualThread::_state_offset; 1960 1961 #define VTHREAD_FIELDS_DO(macro) \ 1962 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \ 1963 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \ 1964 macro(_continuation_offset, k, "cont", continuation_signature, false); \ 1965 macro(_state_offset, k, "state", int_signature, false) 1966 1967 1968 void java_lang_VirtualThread::compute_offsets() { 1969 InstanceKlass* k = vmClasses::VirtualThread_klass(); 1970 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1971 } 1972 1973 bool java_lang_VirtualThread::is_instance(oop obj) { 1974 return obj != nullptr && is_subclass(obj->klass()); 1975 } 1976 1977 oop java_lang_VirtualThread::carrier_thread(oop vthread) { 1978 oop thread = vthread->obj_field(_carrierThread_offset); 1979 return thread; 1980 } 1981 1982 oop java_lang_VirtualThread::continuation(oop vthread) { 1983 oop cont = vthread->obj_field(_continuation_offset); 1984 return cont; 1985 } 1986 1987 int java_lang_VirtualThread::state(oop vthread) { 1988 return vthread->int_field_acquire(_state_offset); 1989 } 1990 1991 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) { 1992 JavaThreadStatus status = JavaThreadStatus::NEW; 1993 switch (state & ~SUSPENDED) { 1994 case NEW: 1995 status = JavaThreadStatus::NEW; 1996 break; 1997 case STARTED: 1998 case RUNNING: 1999 case PARKING: 2000 case TIMED_PARKING: 2001 case UNPARKED: 2002 case YIELDING: 2003 case YIELDED: 2004 status = JavaThreadStatus::RUNNABLE; 2005 break; 2006 case PARKED: 2007 case PINNED: 2008 status = JavaThreadStatus::PARKED; 2009 break; 2010 case TIMED_PARKED: 2011 case TIMED_PINNED: 2012 status = JavaThreadStatus::PARKED_TIMED; 2013 break; 2014 case TERMINATED: 2015 status = JavaThreadStatus::TERMINATED; 2016 break; 2017 default: 2018 ShouldNotReachHere(); 2019 } 2020 return status; 2021 } 2022 2023 #if INCLUDE_CDS 2024 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) { 2025 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2026 } 2027 #endif 2028 2029 // java_lang_Throwable 2030 2031 int java_lang_Throwable::_backtrace_offset; 2032 int java_lang_Throwable::_detailMessage_offset; 2033 int java_lang_Throwable::_stackTrace_offset; 2034 int java_lang_Throwable::_depth_offset; 2035 int java_lang_Throwable::_cause_offset; 2036 int java_lang_Throwable::_static_unassigned_stacktrace_offset; 2037 2038 #define THROWABLE_FIELDS_DO(macro) \ 2039 macro(_backtrace_offset, k, "backtrace", object_signature, false); \ 2040 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \ 2041 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 2042 macro(_depth_offset, k, "depth", int_signature, false); \ 2043 macro(_cause_offset, k, "cause", throwable_signature, false); \ 2044 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 2045 2046 void java_lang_Throwable::compute_offsets() { 2047 InstanceKlass* k = vmClasses::Throwable_klass(); 2048 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2049 } 2050 2051 #if INCLUDE_CDS 2052 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) { 2053 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2054 } 2055 #endif 2056 2057 oop java_lang_Throwable::unassigned_stacktrace() { 2058 InstanceKlass* ik = vmClasses::Throwable_klass(); 2059 oop base = ik->static_field_base_raw(); 2060 return base->obj_field(_static_unassigned_stacktrace_offset); 2061 } 2062 2063 oop java_lang_Throwable::backtrace(oop throwable) { 2064 return throwable->obj_field_acquire(_backtrace_offset); 2065 } 2066 2067 2068 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 2069 throwable->release_obj_field_put(_backtrace_offset, value); 2070 } 2071 2072 int java_lang_Throwable::depth(oop throwable) { 2073 return throwable->int_field(_depth_offset); 2074 } 2075 2076 void java_lang_Throwable::set_depth(oop throwable, int value) { 2077 throwable->int_field_put(_depth_offset, value); 2078 } 2079 2080 oop java_lang_Throwable::message(oop throwable) { 2081 return throwable->obj_field(_detailMessage_offset); 2082 } 2083 2084 oop java_lang_Throwable::cause(oop throwable) { 2085 return throwable->obj_field(_cause_offset); 2086 } 2087 2088 // Return Symbol for detailed_message or null 2089 Symbol* java_lang_Throwable::detail_message(oop throwable) { 2090 PreserveExceptionMark pm(Thread::current()); 2091 oop detailed_message = java_lang_Throwable::message(throwable); 2092 if (detailed_message != nullptr) { 2093 return java_lang_String::as_symbol(detailed_message); 2094 } 2095 return nullptr; 2096 } 2097 2098 void java_lang_Throwable::set_message(oop throwable, oop value) { 2099 throwable->obj_field_put(_detailMessage_offset, value); 2100 } 2101 2102 2103 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 2104 throwable->obj_field_put(_stackTrace_offset, st_element_array); 2105 } 2106 2107 void java_lang_Throwable::clear_stacktrace(oop throwable) { 2108 set_stacktrace(throwable, nullptr); 2109 } 2110 2111 2112 void java_lang_Throwable::print(oop throwable, outputStream* st) { 2113 ResourceMark rm; 2114 Klass* k = throwable->klass(); 2115 assert(k != nullptr, "just checking"); 2116 st->print("%s", k->external_name()); 2117 oop msg = message(throwable); 2118 if (msg != nullptr) { 2119 st->print(": %s", java_lang_String::as_utf8_string(msg)); 2120 } 2121 } 2122 2123 // After this many redefines, the stack trace is unreliable. 2124 const int MAX_VERSION = USHRT_MAX; 2125 2126 static inline bool version_matches(Method* method, int version) { 2127 assert(version < MAX_VERSION, "version is too big"); 2128 return method != nullptr && (method->constants()->version() == version); 2129 } 2130 2131 // This class provides a simple wrapper over the internal structure of 2132 // exception backtrace to insulate users of the backtrace from needing 2133 // to know what it looks like. 2134 // The code of this class is not GC safe. Allocations can only happen 2135 // in expand(). 2136 class BacktraceBuilder: public StackObj { 2137 friend class BacktraceIterator; 2138 private: 2139 Handle _backtrace; 2140 objArrayOop _head; 2141 typeArrayOop _methods; 2142 typeArrayOop _bcis; 2143 objArrayOop _mirrors; 2144 typeArrayOop _names; // Needed to insulate method name against redefinition. 2145 // True if the top frame of the backtrace is omitted because it shall be hidden. 2146 bool _has_hidden_top_frame; 2147 int _index; 2148 NoSafepointVerifier _nsv; 2149 2150 enum { 2151 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 2152 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 2153 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 2154 trace_names_offset = java_lang_Throwable::trace_names_offset, 2155 trace_conts_offset = java_lang_Throwable::trace_conts_offset, 2156 trace_next_offset = java_lang_Throwable::trace_next_offset, 2157 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset, 2158 trace_size = java_lang_Throwable::trace_size, 2159 trace_chunk_size = java_lang_Throwable::trace_chunk_size 2160 }; 2161 2162 // get info out of chunks 2163 static typeArrayOop get_methods(objArrayHandle chunk) { 2164 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 2165 assert(methods != nullptr, "method array should be initialized in backtrace"); 2166 return methods; 2167 } 2168 static typeArrayOop get_bcis(objArrayHandle chunk) { 2169 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 2170 assert(bcis != nullptr, "bci array should be initialized in backtrace"); 2171 return bcis; 2172 } 2173 static objArrayOop get_mirrors(objArrayHandle chunk) { 2174 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 2175 assert(mirrors != nullptr, "mirror array should be initialized in backtrace"); 2176 return mirrors; 2177 } 2178 static typeArrayOop get_names(objArrayHandle chunk) { 2179 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 2180 assert(names != nullptr, "names array should be initialized in backtrace"); 2181 return names; 2182 } 2183 static bool has_hidden_top_frame(objArrayHandle chunk) { 2184 oop hidden = chunk->obj_at(trace_hidden_offset); 2185 return hidden != nullptr; 2186 } 2187 2188 public: 2189 2190 // constructor for new backtrace 2191 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) { 2192 expand(CHECK); 2193 _backtrace = Handle(THREAD, _head); 2194 _index = 0; 2195 } 2196 2197 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 2198 _methods = get_methods(backtrace); 2199 _bcis = get_bcis(backtrace); 2200 _mirrors = get_mirrors(backtrace); 2201 _names = get_names(backtrace); 2202 _has_hidden_top_frame = has_hidden_top_frame(backtrace); 2203 assert(_methods->length() == _bcis->length() && 2204 _methods->length() == _mirrors->length() && 2205 _mirrors->length() == _names->length(), 2206 "method and source information arrays should match"); 2207 2208 // head is the preallocated backtrace 2209 _head = backtrace(); 2210 _backtrace = Handle(thread, _head); 2211 _index = 0; 2212 } 2213 2214 void expand(TRAPS) { 2215 objArrayHandle old_head(THREAD, _head); 2216 PauseNoSafepointVerifier pnsv(&_nsv); 2217 2218 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2219 objArrayHandle new_head(THREAD, head); 2220 2221 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2222 typeArrayHandle new_methods(THREAD, methods); 2223 2224 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2225 typeArrayHandle new_bcis(THREAD, bcis); 2226 2227 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2228 objArrayHandle new_mirrors(THREAD, mirrors); 2229 2230 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2231 typeArrayHandle new_names(THREAD, names); 2232 2233 if (!old_head.is_null()) { 2234 old_head->obj_at_put(trace_next_offset, new_head()); 2235 } 2236 new_head->obj_at_put(trace_methods_offset, new_methods()); 2237 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2238 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2239 new_head->obj_at_put(trace_names_offset, new_names()); 2240 new_head->obj_at_put(trace_hidden_offset, nullptr); 2241 2242 _head = new_head(); 2243 _methods = new_methods(); 2244 _bcis = new_bcis(); 2245 _mirrors = new_mirrors(); 2246 _names = new_names(); 2247 _index = 0; 2248 } 2249 2250 oop backtrace() { 2251 return _backtrace(); 2252 } 2253 2254 inline void push(Method* method, int bci, TRAPS) { 2255 // Smear the -1 bci to 0 since the array only holds unsigned 2256 // shorts. The later line number lookup would just smear the -1 2257 // to a 0 even if it could be recorded. 2258 if (bci == SynchronizationEntryBCI) bci = 0; 2259 2260 if (_index >= trace_chunk_size) { 2261 methodHandle mhandle(THREAD, method); 2262 expand(CHECK); 2263 method = mhandle(); 2264 } 2265 2266 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2267 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2268 2269 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2270 // klass owning the symbols alive so their refcounts aren't decremented. 2271 Symbol* name = method->name(); 2272 _names->symbol_at_put(_index, name); 2273 2274 // We need to save the mirrors in the backtrace to keep the class 2275 // from being unloaded while we still have this stack trace. 2276 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror"); 2277 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2278 2279 _index++; 2280 } 2281 2282 void set_has_hidden_top_frame() { 2283 if (!_has_hidden_top_frame) { 2284 // It would be nice to add java/lang/Boolean::TRUE here 2285 // to indicate that this backtrace has a hidden top frame. 2286 // But this code is used before TRUE is allocated. 2287 // Therefore let's just use an arbitrary legal oop 2288 // available right here. _methods is a short[]. 2289 assert(_methods != nullptr, "we need a legal oop"); 2290 _has_hidden_top_frame = true; 2291 _head->obj_at_put(trace_hidden_offset, _methods); 2292 } 2293 } 2294 }; 2295 2296 struct BacktraceElement : public StackObj { 2297 int _method_id; 2298 int _bci; 2299 int _version; 2300 Symbol* _name; 2301 Handle _mirror; 2302 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2303 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {} 2304 }; 2305 2306 class BacktraceIterator : public StackObj { 2307 int _index; 2308 objArrayHandle _result; 2309 objArrayHandle _mirrors; 2310 typeArrayHandle _methods; 2311 typeArrayHandle _bcis; 2312 typeArrayHandle _names; 2313 2314 void init(objArrayHandle result, Thread* thread) { 2315 // Get method id, bci, version and mirror from chunk 2316 _result = result; 2317 if (_result.not_null()) { 2318 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2319 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2320 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2321 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2322 _index = 0; 2323 } 2324 } 2325 public: 2326 BacktraceIterator(objArrayHandle result, Thread* thread) { 2327 init(result, thread); 2328 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2329 } 2330 2331 BacktraceElement next(Thread* thread) { 2332 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2333 _methods->ushort_at(_index), 2334 Backtrace::version_at(_bcis->int_at(_index)), 2335 Backtrace::bci_at(_bcis->int_at(_index)), 2336 _names->symbol_at(_index)); 2337 _index++; 2338 2339 if (_index >= java_lang_Throwable::trace_chunk_size) { 2340 int next_offset = java_lang_Throwable::trace_next_offset; 2341 // Get next chunk 2342 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2343 init(result, thread); 2344 } 2345 return e; 2346 } 2347 2348 bool repeat() { 2349 return _result.not_null() && _mirrors->obj_at(_index) != nullptr; 2350 } 2351 }; 2352 2353 2354 // Print stack trace element to resource allocated buffer 2355 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 2356 int version, int bci, Symbol* name) { 2357 ResourceMark rm; 2358 2359 // Get strings and string lengths 2360 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2361 const char* klass_name = holder->external_name(); 2362 int buf_len = (int)strlen(klass_name); 2363 2364 char* method_name = name->as_C_string(); 2365 buf_len += (int)strlen(method_name); 2366 2367 char* source_file_name = nullptr; 2368 Symbol* source = Backtrace::get_source_file_name(holder, version); 2369 if (source != nullptr) { 2370 source_file_name = source->as_C_string(); 2371 buf_len += (int)strlen(source_file_name); 2372 } 2373 2374 char *module_name = nullptr, *module_version = nullptr; 2375 ModuleEntry* module = holder->module(); 2376 if (module->is_named()) { 2377 module_name = module->name()->as_C_string(); 2378 buf_len += (int)strlen(module_name); 2379 if (module->version() != nullptr) { 2380 module_version = module->version()->as_C_string(); 2381 buf_len += (int)strlen(module_version); 2382 } 2383 } 2384 2385 // Allocate temporary buffer with extra space for formatting and line number 2386 const size_t buf_size = buf_len + 64; 2387 char* buf = NEW_RESOURCE_ARRAY(char, buf_size); 2388 2389 // Print stack trace line in buffer 2390 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name); 2391 2392 // Print module information 2393 if (module_name != nullptr) { 2394 if (module_version != nullptr) { 2395 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version); 2396 } else { 2397 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name); 2398 } 2399 } 2400 2401 // The method can be null if the requested class version is gone 2402 Method* method = holder->method_with_orig_idnum(method_id, version); 2403 if (!version_matches(method, version)) { 2404 strcat(buf, "Redefined)"); 2405 } else { 2406 int line_number = Backtrace::get_line_number(method, bci); 2407 if (line_number == -2) { 2408 strcat(buf, "Native Method)"); 2409 } else { 2410 if (source_file_name != nullptr && (line_number != -1)) { 2411 // Sourcename and linenumber 2412 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number); 2413 } else if (source_file_name != nullptr) { 2414 // Just sourcename 2415 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name); 2416 } else { 2417 // Neither sourcename nor linenumber 2418 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)"); 2419 } 2420 CompiledMethod* nm = method->code(); 2421 if (WizardMode && nm != nullptr) { 2422 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 2423 } 2424 } 2425 } 2426 2427 st->print_cr("%s", buf); 2428 } 2429 2430 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) { 2431 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 2432 int method_id = method->orig_method_idnum(); 2433 int version = method->constants()->version(); 2434 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 2435 } 2436 2437 /** 2438 * Print the throwable message and its stack trace plus all causes by walking the 2439 * cause chain. The output looks the same as of Throwable.printStackTrace(). 2440 */ 2441 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 2442 // First, print the message. 2443 print(throwable(), st); 2444 st->cr(); 2445 2446 // Now print the stack trace. 2447 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2448 while (throwable.not_null()) { 2449 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 2450 if (result.is_null()) { 2451 st->print_raw_cr("\t<<no stack trace available>>"); 2452 return; 2453 } 2454 BacktraceIterator iter(result, THREAD); 2455 2456 while (iter.repeat()) { 2457 BacktraceElement bte = iter.next(THREAD); 2458 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 2459 } 2460 if (THREAD->can_call_java()) { 2461 // Call getCause() which doesn't necessarily return the _cause field. 2462 ExceptionMark em(THREAD); 2463 JavaValue cause(T_OBJECT); 2464 JavaCalls::call_virtual(&cause, 2465 throwable, 2466 throwable->klass(), 2467 vmSymbols::getCause_name(), 2468 vmSymbols::void_throwable_signature(), 2469 THREAD); 2470 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 2471 if (HAS_PENDING_EXCEPTION) { 2472 CLEAR_PENDING_EXCEPTION; 2473 throwable = Handle(); 2474 } else { 2475 throwable = Handle(THREAD, cause.get_oop()); 2476 if (throwable.not_null()) { 2477 st->print("Caused by: "); 2478 print(throwable(), st); 2479 st->cr(); 2480 } 2481 } 2482 } else { 2483 st->print_raw_cr("<<cannot call Java to get cause>>"); 2484 return; 2485 } 2486 } 2487 } 2488 2489 /** 2490 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 2491 */ 2492 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 2493 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected"); 2494 JavaValue result(T_VOID); 2495 JavaCalls::call_virtual(&result, 2496 throwable, 2497 vmClasses::Throwable_klass(), 2498 vmSymbols::printStackTrace_name(), 2499 vmSymbols::void_method_signature(), 2500 THREAD); 2501 } 2502 2503 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 2504 if (!StackTraceInThrowable) return; 2505 ResourceMark rm(THREAD); 2506 2507 // Start out by clearing the backtrace for this object, in case the VM 2508 // runs out of memory while allocating the stack trace 2509 set_backtrace(throwable(), nullptr); 2510 // Clear lazily constructed Java level stacktrace if refilling occurs 2511 // This is unnecessary in 1.7+ but harmless 2512 clear_stacktrace(throwable()); 2513 2514 int max_depth = MaxJavaStackTraceDepth; 2515 JavaThread* thread = THREAD; 2516 2517 BacktraceBuilder bt(CHECK); 2518 2519 // If there is no Java frame just return the method that was being called 2520 // with bci 0 2521 if (!thread->has_last_Java_frame()) { 2522 if (max_depth >= 1 && method() != nullptr) { 2523 bt.push(method(), 0, CHECK); 2524 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 2525 set_depth(throwable(), 1); 2526 set_backtrace(throwable(), bt.backtrace()); 2527 } 2528 return; 2529 } 2530 2531 // Instead of using vframe directly, this version of fill_in_stack_trace 2532 // basically handles everything by hand. This significantly improved the 2533 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 2534 // See bug 6333838 for more details. 2535 // The "ASSERT" here is to verify this method generates the exactly same stack 2536 // trace as utilizing vframe. 2537 #ifdef ASSERT 2538 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */); 2539 #endif 2540 int total_count = 0; 2541 RegisterMap map(thread, 2542 RegisterMap::UpdateMap::skip, 2543 RegisterMap::ProcessFrames::skip, 2544 RegisterMap::WalkContinuation::include); 2545 int decode_offset = 0; 2546 CompiledMethod* nm = nullptr; 2547 bool skip_fillInStackTrace_check = false; 2548 bool skip_throwableInit_check = false; 2549 bool skip_hidden = !ShowHiddenFrames; 2550 bool show_carrier = ShowCarrierFrames; 2551 ContinuationEntry* cont_entry = thread->last_continuation(); 2552 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 2553 Method* method = nullptr; 2554 int bci = 0; 2555 2556 // Compiled java method case. 2557 if (decode_offset != 0) { 2558 DebugInfoReadStream stream(nm, decode_offset); 2559 decode_offset = stream.read_int(); 2560 method = (Method*)nm->metadata_at(stream.read_int()); 2561 bci = stream.read_bci(); 2562 } else { 2563 if (fr.is_first_frame()) break; 2564 2565 if (Continuation::is_continuation_enterSpecial(fr)) { 2566 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), ""); 2567 if (!show_carrier && cont_entry->is_virtual_thread()) { 2568 break; 2569 } 2570 cont_entry = cont_entry->parent(); 2571 } 2572 2573 address pc = fr.pc(); 2574 if (fr.is_interpreted_frame()) { 2575 address bcp; 2576 if (!map.in_cont()) { 2577 bcp = fr.interpreter_frame_bcp(); 2578 method = fr.interpreter_frame_method(); 2579 } else { 2580 bcp = map.stack_chunk()->interpreter_frame_bcp(fr); 2581 method = map.stack_chunk()->interpreter_frame_method(fr); 2582 } 2583 bci = method->bci_from(bcp); 2584 fr = fr.sender(&map); 2585 } else { 2586 CodeBlob* cb = fr.cb(); 2587 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null 2588 // but non nmethod 2589 fr = fr.sender(&map); 2590 if (cb == nullptr || !cb->is_compiled()) { 2591 continue; 2592 } 2593 nm = cb->as_compiled_method(); 2594 assert(nm->method() != nullptr, "must be"); 2595 if (nm->method()->is_native()) { 2596 method = nm->method(); 2597 bci = 0; 2598 } else { 2599 PcDesc* pd = nm->pc_desc_at(pc); 2600 decode_offset = pd->scope_decode_offset(); 2601 // if decode_offset is not equal to 0, it will execute the 2602 // "compiled java method case" at the beginning of the loop. 2603 continue; 2604 } 2605 } 2606 } 2607 #ifdef ASSERT 2608 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace 2609 assert(st.method() == method && st.bci() == bci, "Wrong stack trace"); 2610 st.next(); 2611 } 2612 #endif 2613 2614 // the format of the stacktrace will be: 2615 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2616 // - 0 or more <init> methods for the exception class (skipped) 2617 // - rest of the stack 2618 2619 if (!skip_fillInStackTrace_check) { 2620 if (method->name() == vmSymbols::fillInStackTrace_name() && 2621 throwable->is_a(method->method_holder())) { 2622 continue; 2623 } 2624 else { 2625 skip_fillInStackTrace_check = true; // gone past them all 2626 } 2627 } 2628 if (!skip_throwableInit_check) { 2629 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2630 2631 // skip <init> methods of the exception class and superclasses 2632 // This is similar to classic VM. 2633 if (method->name() == vmSymbols::object_initializer_name() && 2634 throwable->is_a(method->method_holder())) { 2635 continue; 2636 } else { 2637 // there are none or we've seen them all - either way stop checking 2638 skip_throwableInit_check = true; 2639 } 2640 } 2641 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) { 2642 if (skip_hidden) { 2643 if (total_count == 0) { 2644 // The top frame will be hidden from the stack trace. 2645 bt.set_has_hidden_top_frame(); 2646 } 2647 continue; 2648 } 2649 } 2650 2651 bt.push(method, bci, CHECK); 2652 total_count++; 2653 } 2654 2655 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2656 2657 // Put completed stack trace into throwable object 2658 set_backtrace(throwable(), bt.backtrace()); 2659 set_depth(throwable(), total_count); 2660 } 2661 2662 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2663 // No-op if stack trace is disabled 2664 if (!StackTraceInThrowable) { 2665 return; 2666 } 2667 2668 // Disable stack traces for some preallocated out of memory errors 2669 if (!Universe::should_fill_in_stack_trace(throwable)) { 2670 return; 2671 } 2672 2673 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2674 PreserveExceptionMark pm(THREAD); 2675 2676 fill_in_stack_trace(throwable, method, THREAD); 2677 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the 2678 // original exception via the PreserveExceptionMark destructor. 2679 CLEAR_PENDING_EXCEPTION; 2680 } 2681 2682 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2683 // Allocate stack trace - backtrace is created but not filled in 2684 2685 // No-op if stack trace is disabled 2686 if (!StackTraceInThrowable) return; 2687 BacktraceBuilder bt(CHECK); // creates a backtrace 2688 set_backtrace(throwable(), bt.backtrace()); 2689 } 2690 2691 2692 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2693 // Fill in stack trace into preallocated backtrace (no GC) 2694 2695 // No-op if stack trace is disabled 2696 if (!StackTraceInThrowable) return; 2697 2698 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check"); 2699 2700 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2701 2702 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2703 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2704 2705 ResourceMark rm(THREAD); 2706 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */); 2707 2708 BacktraceBuilder bt(THREAD, backtrace); 2709 2710 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2711 // methods as preallocated errors aren't created by "java" code. 2712 2713 // fill in as much stack trace as possible 2714 int chunk_count = 0; 2715 for (;!st.at_end(); st.next()) { 2716 bt.push(st.method(), st.bci(), CHECK); 2717 chunk_count++; 2718 2719 // Bail-out for deep stacks 2720 if (chunk_count >= trace_chunk_size) break; 2721 } 2722 set_depth(throwable(), chunk_count); 2723 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2724 2725 // We support the Throwable immutability protocol defined for Java 7. 2726 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2727 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized"); 2728 } 2729 2730 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace, 2731 objArrayHandle stack_trace_array_h, TRAPS) { 2732 2733 if (backtrace.is_null() || stack_trace_array_h.is_null()) { 2734 THROW(vmSymbols::java_lang_NullPointerException()); 2735 } 2736 2737 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2738 2739 if (stack_trace_array_h->length() != depth) { 2740 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2741 } 2742 2743 objArrayHandle result(THREAD, objArrayOop(backtrace())); 2744 BacktraceIterator iter(result, THREAD); 2745 2746 int index = 0; 2747 while (iter.repeat()) { 2748 BacktraceElement bte = iter.next(THREAD); 2749 2750 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2751 2752 if (stack_trace_element.is_null()) { 2753 THROW(vmSymbols::java_lang_NullPointerException()); 2754 } 2755 2756 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2757 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2758 2759 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2760 method, 2761 bte._version, 2762 bte._bci, 2763 bte._name, 2764 CHECK); 2765 } 2766 } 2767 2768 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) { 2769 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization 2770 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive 2771 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and 2772 // symbolic stacktrace of 'throwable'. 2773 assert(throwable.not_null(), "shouldn't be"); 2774 2775 // Now create the message from the original exception and thread name. 2776 ResourceMark rm(current); 2777 const char *message = nullptr; 2778 oop detailed_message = java_lang_Throwable::message(throwable()); 2779 if (detailed_message != nullptr) { 2780 message = java_lang_String::as_utf8_string(detailed_message); 2781 } 2782 stringStream st; 2783 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(), 2784 message == nullptr ? "" : ":"); 2785 if (message == nullptr) { 2786 st.print("[in thread \"%s\"]", current->name()); 2787 } else { 2788 st.print("%s [in thread \"%s\"]", message, current->name()); 2789 } 2790 2791 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError(); 2792 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string()); 2793 // If new_exception returns a different exception while creating the exception, 2794 // abandon the attempt to save the initialization error and return null. 2795 if (init_error->klass()->name() != exception_name) { 2796 log_info(class, init)("Exception %s thrown while saving initialization exception", 2797 init_error->klass()->external_name()); 2798 return Handle(); 2799 } 2800 2801 // Call to java to fill in the stack trace and clear declaringClassObject to 2802 // not keep classes alive in the stack trace. 2803 // call this: public StackTraceElement[] getStackTrace() 2804 JavaValue result(T_ARRAY); 2805 JavaCalls::call_virtual(&result, throwable, 2806 vmClasses::Throwable_klass(), 2807 vmSymbols::getStackTrace_name(), 2808 vmSymbols::getStackTrace_signature(), 2809 current); 2810 if (!current->has_pending_exception()){ 2811 Handle stack_trace(current, result.get_oop()); 2812 assert(stack_trace->is_objArray(), "Should be an array"); 2813 java_lang_Throwable::set_stacktrace(init_error(), stack_trace()); 2814 // Clear backtrace because the stacktrace should be used instead. 2815 set_backtrace(init_error(), nullptr); 2816 } else { 2817 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s", 2818 init_error->klass()->external_name()); 2819 current->clear_pending_exception(); 2820 } 2821 2822 return init_error; 2823 } 2824 2825 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) { 2826 JavaThread* current = JavaThread::current(); 2827 objArrayHandle result(current, objArrayOop(backtrace(throwable))); 2828 BacktraceIterator iter(result, current); 2829 // No backtrace available. 2830 if (!iter.repeat()) return false; 2831 2832 // If the exception happened in a frame that has been hidden, i.e., 2833 // omitted from the back trace, we can not compute the message. 2834 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset); 2835 if (hidden != nullptr) { 2836 return false; 2837 } 2838 2839 // Get first backtrace element. 2840 BacktraceElement bte = iter.next(current); 2841 2842 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2843 assert(holder != nullptr, "first element should be non-null"); 2844 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version); 2845 2846 // Original version is no longer available. 2847 if (m == nullptr || !version_matches(m, bte._version)) { 2848 return false; 2849 } 2850 2851 *method = m; 2852 *bci = bte._bci; 2853 return true; 2854 } 2855 2856 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2857 // Allocate java.lang.StackTraceElement instance 2858 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 2859 assert(k != nullptr, "must be loaded in 1.4+"); 2860 if (k->should_be_initialized()) { 2861 k->initialize(CHECK_NULL); 2862 } 2863 2864 Handle element = k->allocate_instance_handle(CHECK_NULL); 2865 2866 int version = method->constants()->version(); 2867 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL); 2868 return element(); 2869 } 2870 2871 void java_lang_StackTraceElement::fill_in(Handle element, 2872 InstanceKlass* holder, const methodHandle& method, 2873 int version, int bci, Symbol* name, TRAPS) { 2874 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check"); 2875 2876 ResourceMark rm(THREAD); 2877 HandleMark hm(THREAD); 2878 2879 // Fill in class name 2880 Handle java_class(THREAD, holder->java_mirror()); 2881 oop classname = java_lang_Class::name(java_class, CHECK); 2882 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2883 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class()); 2884 2885 oop loader = holder->class_loader(); 2886 if (loader != nullptr) { 2887 oop loader_name = java_lang_ClassLoader::name(loader); 2888 if (loader_name != nullptr) 2889 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2890 } 2891 2892 // Fill in method name 2893 oop methodname = StringTable::intern(name, CHECK); 2894 java_lang_StackTraceElement::set_methodName(element(), methodname); 2895 2896 // Fill in module name and version 2897 ModuleEntry* module = holder->module(); 2898 if (module->is_named()) { 2899 oop module_name = StringTable::intern(module->name(), CHECK); 2900 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2901 oop module_version; 2902 if (module->version() != nullptr) { 2903 module_version = StringTable::intern(module->version(), CHECK); 2904 } else { 2905 module_version = nullptr; 2906 } 2907 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2908 } 2909 2910 if (method() == nullptr || !version_matches(method(), version)) { 2911 // The method was redefined, accurate line number information isn't available 2912 java_lang_StackTraceElement::set_fileName(element(), nullptr); 2913 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2914 } else { 2915 Symbol* source; 2916 oop source_file; 2917 int line_number; 2918 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK); 2919 2920 java_lang_StackTraceElement::set_fileName(element(), source_file); 2921 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2922 } 2923 } 2924 2925 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class, 2926 InstanceKlass* holder, 2927 int version, 2928 const methodHandle& method, 2929 int bci, 2930 Symbol*& source, 2931 oop& source_file, 2932 int& line_number, TRAPS) { 2933 // Fill in source file name and line number. 2934 source = Backtrace::get_source_file_name(holder, version); 2935 source_file = java_lang_Class::source_file(java_class()); 2936 if (source != nullptr) { 2937 // Class was not redefined. We can trust its cache if set, 2938 // else we have to initialize it. 2939 if (source_file == nullptr) { 2940 source_file = StringTable::intern(source, CHECK); 2941 java_lang_Class::set_source_file(java_class(), source_file); 2942 } 2943 } else { 2944 // Class was redefined. Dump the cache if it was set. 2945 if (source_file != nullptr) { 2946 source_file = nullptr; 2947 java_lang_Class::set_source_file(java_class(), source_file); 2948 } 2949 } 2950 line_number = Backtrace::get_line_number(method(), bci); 2951 } 2952 2953 #if INCLUDE_JVMCI 2954 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci, 2955 Symbol*& filename, int& line_number, TRAPS) { 2956 ResourceMark rm(THREAD); 2957 HandleMark hm(THREAD); 2958 2959 filename = nullptr; 2960 line_number = -1; 2961 2962 oop source_file; 2963 int version = method->constants()->version(); 2964 InstanceKlass* holder = method->method_holder(); 2965 Handle java_class(THREAD, holder->java_mirror()); 2966 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK); 2967 } 2968 #endif // INCLUDE_JVMCI 2969 2970 // java_lang_ClassFrameInfo 2971 2972 int java_lang_ClassFrameInfo::_classOrMemberName_offset; 2973 int java_lang_ClassFrameInfo::_flags_offset; 2974 2975 #define CLASSFRAMEINFO_FIELDS_DO(macro) \ 2976 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \ 2977 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false) 2978 2979 void java_lang_ClassFrameInfo::compute_offsets() { 2980 InstanceKlass* k = vmClasses::ClassFrameInfo_klass(); 2981 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2982 } 2983 2984 #if INCLUDE_CDS 2985 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) { 2986 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2987 } 2988 #endif 2989 2990 static int get_flags(const methodHandle& m) { 2991 int flags = (jushort)( m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS ); 2992 if (m->is_initializer()) { 2993 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR; 2994 } else { 2995 flags |= java_lang_invoke_MemberName::MN_IS_METHOD; 2996 } 2997 if (m->caller_sensitive()) { 2998 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE; 2999 } 3000 if (m->is_hidden()) { 3001 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER; 3002 } 3003 assert((flags & 0xFF000000) == 0, "unexpected flags"); 3004 return flags; 3005 } 3006 3007 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) { 3008 return obj->obj_field(_classOrMemberName_offset); 3009 } 3010 3011 int java_lang_ClassFrameInfo::flags(oop obj) { 3012 return obj->int_field(_flags_offset); 3013 } 3014 3015 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) { 3016 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror()); 3017 // flags is initialized when ClassFrameInfo object is constructed and retain the value 3018 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m); 3019 stackFrame->int_field_put(_flags_offset, flags); 3020 } 3021 3022 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) { 3023 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK); 3024 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name); 3025 // flags is initialized when ClassFrameInfo object is constructed and retain the value 3026 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m); 3027 stackFrame->int_field_put(_flags_offset, flags); 3028 } 3029 3030 3031 // java_lang_StackFrameInfo 3032 3033 int java_lang_StackFrameInfo::_type_offset; 3034 int java_lang_StackFrameInfo::_name_offset; 3035 int java_lang_StackFrameInfo::_bci_offset; 3036 int java_lang_StackFrameInfo::_version_offset; 3037 int java_lang_StackFrameInfo::_contScope_offset; 3038 3039 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 3040 macro(_type_offset, k, "type", object_signature, false); \ 3041 macro(_name_offset, k, "name", string_signature, false); \ 3042 macro(_bci_offset, k, "bci", int_signature, false); \ 3043 macro(_contScope_offset, k, "contScope", continuationscope_signature, false) 3044 3045 void java_lang_StackFrameInfo::compute_offsets() { 3046 InstanceKlass* k = vmClasses::StackFrameInfo_klass(); 3047 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3048 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3049 } 3050 3051 #if INCLUDE_CDS 3052 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) { 3053 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3054 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3055 } 3056 #endif 3057 3058 Method* java_lang_StackFrameInfo::get_method(oop obj) { 3059 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj); 3060 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m); 3061 return method; 3062 } 3063 3064 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) { 3065 // set Method* or mid/cpref 3066 HandleMark hm(THREAD); 3067 Handle cont_h(THREAD, cont); 3068 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK); 3069 3070 // set bci 3071 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 3072 // method may be redefined; store the version 3073 int version = method->constants()->version(); 3074 assert((jushort)version == version, "version should be short"); 3075 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 3076 3077 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr; 3078 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope); 3079 } 3080 3081 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 3082 ResourceMark rm(THREAD); 3083 HandleMark hm(THREAD); 3084 3085 Method* method = java_lang_StackFrameInfo::get_method(stackFrame()); 3086 InstanceKlass* holder = method->method_holder(); 3087 short version = stackFrame->short_field(_version_offset); 3088 int bci = stackFrame->int_field(_bci_offset); 3089 Symbol* name = method->name(); 3090 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK); 3091 } 3092 3093 oop java_lang_StackFrameInfo::type(oop obj) { 3094 return obj->obj_field(_type_offset); 3095 } 3096 3097 void java_lang_StackFrameInfo::set_type(oop obj, oop value) { 3098 obj->obj_field_put(_type_offset, value); 3099 } 3100 3101 oop java_lang_StackFrameInfo::name(oop obj) { 3102 return obj->obj_field(_name_offset); 3103 } 3104 3105 void java_lang_StackFrameInfo::set_name(oop obj, oop value) { 3106 obj->obj_field_put(_name_offset, value); 3107 } 3108 3109 void java_lang_StackFrameInfo::set_version(oop obj, short value) { 3110 obj->short_field_put(_version_offset, value); 3111 } 3112 3113 void java_lang_StackFrameInfo::set_bci(oop obj, int value) { 3114 assert(value >= 0 && value < max_jushort, "must be a valid bci value"); 3115 obj->int_field_put(_bci_offset, value); 3116 } 3117 3118 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) { 3119 obj->obj_field_put(_contScope_offset, value); 3120 } 3121 3122 int java_lang_LiveStackFrameInfo::_monitors_offset; 3123 int java_lang_LiveStackFrameInfo::_locals_offset; 3124 int java_lang_LiveStackFrameInfo::_operands_offset; 3125 int java_lang_LiveStackFrameInfo::_mode_offset; 3126 3127 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 3128 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 3129 macro(_locals_offset, k, "locals", object_array_signature, false); \ 3130 macro(_operands_offset, k, "operands", object_array_signature, false); \ 3131 macro(_mode_offset, k, "mode", int_signature, false) 3132 3133 void java_lang_LiveStackFrameInfo::compute_offsets() { 3134 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass(); 3135 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3136 } 3137 3138 #if INCLUDE_CDS 3139 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) { 3140 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3141 } 3142 #endif 3143 3144 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) { 3145 obj->obj_field_put(_monitors_offset, value); 3146 } 3147 3148 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) { 3149 obj->obj_field_put(_locals_offset, value); 3150 } 3151 3152 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) { 3153 obj->obj_field_put(_operands_offset, value); 3154 } 3155 3156 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) { 3157 obj->int_field_put(_mode_offset, value); 3158 } 3159 3160 3161 // java_lang_AccessibleObject 3162 3163 int java_lang_reflect_AccessibleObject::_override_offset; 3164 3165 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 3166 macro(_override_offset, k, "override", bool_signature, false) 3167 3168 void java_lang_reflect_AccessibleObject::compute_offsets() { 3169 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass(); 3170 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3171 } 3172 3173 #if INCLUDE_CDS 3174 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) { 3175 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3176 } 3177 #endif 3178 3179 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 3180 return (jboolean) reflect->bool_field(_override_offset); 3181 } 3182 3183 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 3184 reflect->bool_field_put(_override_offset, (int) value); 3185 } 3186 3187 // java_lang_reflect_Method 3188 3189 int java_lang_reflect_Method::_clazz_offset; 3190 int java_lang_reflect_Method::_name_offset; 3191 int java_lang_reflect_Method::_returnType_offset; 3192 int java_lang_reflect_Method::_parameterTypes_offset; 3193 int java_lang_reflect_Method::_exceptionTypes_offset; 3194 int java_lang_reflect_Method::_slot_offset; 3195 int java_lang_reflect_Method::_modifiers_offset; 3196 int java_lang_reflect_Method::_signature_offset; 3197 int java_lang_reflect_Method::_annotations_offset; 3198 int java_lang_reflect_Method::_parameter_annotations_offset; 3199 int java_lang_reflect_Method::_annotation_default_offset; 3200 3201 #define METHOD_FIELDS_DO(macro) \ 3202 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3203 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3204 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 3205 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 3206 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 3207 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3208 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3209 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3210 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 3211 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \ 3212 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false); 3213 3214 void java_lang_reflect_Method::compute_offsets() { 3215 InstanceKlass* k = vmClasses::reflect_Method_klass(); 3216 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3217 } 3218 3219 #if INCLUDE_CDS 3220 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) { 3221 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3222 } 3223 #endif 3224 3225 Handle java_lang_reflect_Method::create(TRAPS) { 3226 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3227 Klass* klass = vmClasses::reflect_Method_klass(); 3228 // This class is eagerly initialized during VM initialization, since we keep a reference 3229 // to one of the methods 3230 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 3231 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 3232 } 3233 3234 oop java_lang_reflect_Method::clazz(oop reflect) { 3235 return reflect->obj_field(_clazz_offset); 3236 } 3237 3238 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 3239 reflect->obj_field_put(_clazz_offset, value); 3240 } 3241 3242 int java_lang_reflect_Method::slot(oop reflect) { 3243 return reflect->int_field(_slot_offset); 3244 } 3245 3246 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 3247 reflect->int_field_put(_slot_offset, value); 3248 } 3249 3250 void java_lang_reflect_Method::set_name(oop method, oop value) { 3251 method->obj_field_put(_name_offset, value); 3252 } 3253 3254 oop java_lang_reflect_Method::return_type(oop method) { 3255 return method->obj_field(_returnType_offset); 3256 } 3257 3258 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 3259 method->obj_field_put(_returnType_offset, value); 3260 } 3261 3262 oop java_lang_reflect_Method::parameter_types(oop method) { 3263 return method->obj_field(_parameterTypes_offset); 3264 } 3265 3266 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 3267 method->obj_field_put(_parameterTypes_offset, value); 3268 } 3269 3270 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 3271 method->obj_field_put(_exceptionTypes_offset, value); 3272 } 3273 3274 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 3275 method->int_field_put(_modifiers_offset, value); 3276 } 3277 3278 void java_lang_reflect_Method::set_signature(oop method, oop value) { 3279 method->obj_field_put(_signature_offset, value); 3280 } 3281 3282 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 3283 method->obj_field_put(_annotations_offset, value); 3284 } 3285 3286 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 3287 method->obj_field_put(_parameter_annotations_offset, value); 3288 } 3289 3290 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 3291 method->obj_field_put(_annotation_default_offset, value); 3292 } 3293 3294 int java_lang_reflect_Constructor::_clazz_offset; 3295 int java_lang_reflect_Constructor::_parameterTypes_offset; 3296 int java_lang_reflect_Constructor::_exceptionTypes_offset; 3297 int java_lang_reflect_Constructor::_slot_offset; 3298 int java_lang_reflect_Constructor::_modifiers_offset; 3299 int java_lang_reflect_Constructor::_signature_offset; 3300 int java_lang_reflect_Constructor::_annotations_offset; 3301 int java_lang_reflect_Constructor::_parameter_annotations_offset; 3302 3303 #define CONSTRUCTOR_FIELDS_DO(macro) \ 3304 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3305 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 3306 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 3307 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3308 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3309 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3310 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 3311 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); 3312 3313 void java_lang_reflect_Constructor::compute_offsets() { 3314 InstanceKlass* k = vmClasses::reflect_Constructor_klass(); 3315 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3316 } 3317 3318 #if INCLUDE_CDS 3319 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) { 3320 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3321 } 3322 #endif 3323 3324 Handle java_lang_reflect_Constructor::create(TRAPS) { 3325 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3326 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 3327 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3328 InstanceKlass* ik = InstanceKlass::cast(k); 3329 // Ensure it is initialized 3330 ik->initialize(CHECK_NH); 3331 return ik->allocate_instance_handle(THREAD); 3332 } 3333 3334 oop java_lang_reflect_Constructor::clazz(oop reflect) { 3335 return reflect->obj_field(_clazz_offset); 3336 } 3337 3338 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 3339 reflect->obj_field_put(_clazz_offset, value); 3340 } 3341 3342 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 3343 return constructor->obj_field(_parameterTypes_offset); 3344 } 3345 3346 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 3347 constructor->obj_field_put(_parameterTypes_offset, value); 3348 } 3349 3350 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 3351 constructor->obj_field_put(_exceptionTypes_offset, value); 3352 } 3353 3354 int java_lang_reflect_Constructor::slot(oop reflect) { 3355 return reflect->int_field(_slot_offset); 3356 } 3357 3358 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 3359 reflect->int_field_put(_slot_offset, value); 3360 } 3361 3362 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 3363 constructor->int_field_put(_modifiers_offset, value); 3364 } 3365 3366 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 3367 constructor->obj_field_put(_signature_offset, value); 3368 } 3369 3370 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 3371 constructor->obj_field_put(_annotations_offset, value); 3372 } 3373 3374 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 3375 method->obj_field_put(_parameter_annotations_offset, value); 3376 } 3377 3378 int java_lang_reflect_Field::_clazz_offset; 3379 int java_lang_reflect_Field::_name_offset; 3380 int java_lang_reflect_Field::_type_offset; 3381 int java_lang_reflect_Field::_slot_offset; 3382 int java_lang_reflect_Field::_modifiers_offset; 3383 int java_lang_reflect_Field::_trusted_final_offset; 3384 int java_lang_reflect_Field::_signature_offset; 3385 int java_lang_reflect_Field::_annotations_offset; 3386 3387 #define FIELD_FIELDS_DO(macro) \ 3388 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3389 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3390 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \ 3391 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3392 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3393 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \ 3394 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3395 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); 3396 3397 void java_lang_reflect_Field::compute_offsets() { 3398 InstanceKlass* k = vmClasses::reflect_Field_klass(); 3399 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3400 } 3401 3402 #if INCLUDE_CDS 3403 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) { 3404 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3405 } 3406 #endif 3407 3408 Handle java_lang_reflect_Field::create(TRAPS) { 3409 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3410 Symbol* name = vmSymbols::java_lang_reflect_Field(); 3411 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3412 InstanceKlass* ik = InstanceKlass::cast(k); 3413 // Ensure it is initialized 3414 ik->initialize(CHECK_NH); 3415 return ik->allocate_instance_handle(THREAD); 3416 } 3417 3418 oop java_lang_reflect_Field::clazz(oop reflect) { 3419 return reflect->obj_field(_clazz_offset); 3420 } 3421 3422 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 3423 reflect->obj_field_put(_clazz_offset, value); 3424 } 3425 3426 oop java_lang_reflect_Field::name(oop field) { 3427 return field->obj_field(_name_offset); 3428 } 3429 3430 void java_lang_reflect_Field::set_name(oop field, oop value) { 3431 field->obj_field_put(_name_offset, value); 3432 } 3433 3434 oop java_lang_reflect_Field::type(oop field) { 3435 return field->obj_field(_type_offset); 3436 } 3437 3438 void java_lang_reflect_Field::set_type(oop field, oop value) { 3439 field->obj_field_put(_type_offset, value); 3440 } 3441 3442 int java_lang_reflect_Field::slot(oop reflect) { 3443 return reflect->int_field(_slot_offset); 3444 } 3445 3446 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 3447 reflect->int_field_put(_slot_offset, value); 3448 } 3449 3450 int java_lang_reflect_Field::modifiers(oop field) { 3451 return field->int_field(_modifiers_offset); 3452 } 3453 3454 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 3455 field->int_field_put(_modifiers_offset, value); 3456 } 3457 3458 void java_lang_reflect_Field::set_trusted_final(oop field) { 3459 field->bool_field_put(_trusted_final_offset, true); 3460 } 3461 3462 void java_lang_reflect_Field::set_signature(oop field, oop value) { 3463 field->obj_field_put(_signature_offset, value); 3464 } 3465 3466 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 3467 field->obj_field_put(_annotations_offset, value); 3468 } 3469 3470 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) { 3471 // Allocate java.lang.reflect.RecordComponent instance 3472 HandleMark hm(THREAD); 3473 InstanceKlass* ik = vmClasses::RecordComponent_klass(); 3474 assert(ik != nullptr, "must be loaded"); 3475 ik->initialize(CHECK_NULL); 3476 3477 Handle element = ik->allocate_instance_handle(CHECK_NULL); 3478 3479 Handle decl_class(THREAD, holder->java_mirror()); 3480 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class()); 3481 3482 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8 3483 oop component_name = StringTable::intern(name, CHECK_NULL); 3484 java_lang_reflect_RecordComponent::set_name(element(), component_name); 3485 3486 Symbol* type = holder->constants()->symbol_at(component->descriptor_index()); 3487 Handle component_type_h = 3488 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL); 3489 java_lang_reflect_RecordComponent::set_type(element(), component_type_h()); 3490 3491 Method* accessor_method = nullptr; 3492 { 3493 // Prepend "()" to type to create the full method signature. 3494 ResourceMark rm(THREAD); 3495 int sig_len = type->utf8_length() + 3; // "()" and null char 3496 char* sig = NEW_RESOURCE_ARRAY(char, sig_len); 3497 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string()); 3498 TempNewSymbol full_sig = SymbolTable::new_symbol(sig); 3499 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find); 3500 } 3501 3502 if (accessor_method != nullptr) { 3503 methodHandle method(THREAD, accessor_method); 3504 oop m = Reflection::new_method(method, false, CHECK_NULL); 3505 java_lang_reflect_RecordComponent::set_accessor(element(), m); 3506 } else { 3507 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr); 3508 } 3509 3510 int sig_index = component->generic_signature_index(); 3511 if (sig_index > 0) { 3512 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8 3513 oop component_sig = StringTable::intern(sig, CHECK_NULL); 3514 java_lang_reflect_RecordComponent::set_signature(element(), component_sig); 3515 } else { 3516 java_lang_reflect_RecordComponent::set_signature(element(), nullptr); 3517 } 3518 3519 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL); 3520 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop); 3521 3522 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL); 3523 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop); 3524 3525 return element(); 3526 } 3527 3528 int reflect_ConstantPool::_oop_offset; 3529 3530 #define CONSTANTPOOL_FIELDS_DO(macro) \ 3531 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 3532 3533 void reflect_ConstantPool::compute_offsets() { 3534 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass(); 3535 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3536 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3537 } 3538 3539 #if INCLUDE_CDS 3540 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) { 3541 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3542 } 3543 #endif 3544 3545 int java_lang_reflect_Parameter::_name_offset; 3546 int java_lang_reflect_Parameter::_modifiers_offset; 3547 int java_lang_reflect_Parameter::_index_offset; 3548 int java_lang_reflect_Parameter::_executable_offset; 3549 3550 #define PARAMETER_FIELDS_DO(macro) \ 3551 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3552 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3553 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3554 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3555 3556 void java_lang_reflect_Parameter::compute_offsets() { 3557 InstanceKlass* k = vmClasses::reflect_Parameter_klass(); 3558 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3559 } 3560 3561 #if INCLUDE_CDS 3562 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) { 3563 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3564 } 3565 #endif 3566 3567 Handle java_lang_reflect_Parameter::create(TRAPS) { 3568 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3569 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3570 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3571 InstanceKlass* ik = InstanceKlass::cast(k); 3572 // Ensure it is initialized 3573 ik->initialize(CHECK_NH); 3574 return ik->allocate_instance_handle(THREAD); 3575 } 3576 3577 oop java_lang_reflect_Parameter::name(oop param) { 3578 return param->obj_field(_name_offset); 3579 } 3580 3581 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3582 param->obj_field_put(_name_offset, value); 3583 } 3584 3585 int java_lang_reflect_Parameter::modifiers(oop param) { 3586 return param->int_field(_modifiers_offset); 3587 } 3588 3589 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3590 param->int_field_put(_modifiers_offset, value); 3591 } 3592 3593 int java_lang_reflect_Parameter::index(oop param) { 3594 return param->int_field(_index_offset); 3595 } 3596 3597 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3598 param->int_field_put(_index_offset, value); 3599 } 3600 3601 oop java_lang_reflect_Parameter::executable(oop param) { 3602 return param->obj_field(_executable_offset); 3603 } 3604 3605 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3606 param->obj_field_put(_executable_offset, value); 3607 } 3608 3609 // java_lang_Module 3610 3611 int java_lang_Module::_loader_offset; 3612 int java_lang_Module::_name_offset; 3613 int java_lang_Module::_module_entry_offset; 3614 3615 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3616 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3617 return JavaCalls::construct_new_instance(vmClasses::Module_klass(), 3618 vmSymbols::java_lang_module_init_signature(), 3619 loader, module_name, CHECK_NH); 3620 } 3621 3622 #define MODULE_FIELDS_DO(macro) \ 3623 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3624 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false) 3625 3626 void java_lang_Module::compute_offsets() { 3627 InstanceKlass* k = vmClasses::Module_klass(); 3628 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3629 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3630 } 3631 3632 #if INCLUDE_CDS 3633 void java_lang_Module::serialize_offsets(SerializeClosure* f) { 3634 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3635 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3636 } 3637 #endif 3638 3639 oop java_lang_Module::loader(oop module) { 3640 return module->obj_field(_loader_offset); 3641 } 3642 3643 void java_lang_Module::set_loader(oop module, oop value) { 3644 module->obj_field_put(_loader_offset, value); 3645 } 3646 3647 oop java_lang_Module::name(oop module) { 3648 return module->obj_field(_name_offset); 3649 } 3650 3651 void java_lang_Module::set_name(oop module, oop value) { 3652 module->obj_field_put(_name_offset, value); 3653 } 3654 3655 ModuleEntry* java_lang_Module::module_entry_raw(oop module) { 3656 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 3657 assert(module != nullptr, "module can't be null"); 3658 assert(oopDesc::is_oop(module), "module must be oop"); 3659 3660 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3661 return module_entry; 3662 } 3663 3664 ModuleEntry* java_lang_Module::module_entry(oop module) { 3665 ModuleEntry* module_entry = module_entry_raw(module); 3666 if (module_entry == nullptr) { 3667 // If the inject field containing the ModuleEntry* is null then return the 3668 // class loader's unnamed module. 3669 oop loader = java_lang_Module::loader(module); 3670 Handle h_loader = Handle(Thread::current(), loader); 3671 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3672 return loader_cld->unnamed_module(); 3673 } 3674 return module_entry; 3675 } 3676 3677 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3678 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 3679 assert(module != nullptr, "module can't be null"); 3680 assert(oopDesc::is_oop(module), "module must be oop"); 3681 module->address_field_put(_module_entry_offset, (address)module_entry); 3682 } 3683 3684 Handle reflect_ConstantPool::create(TRAPS) { 3685 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3686 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass(); 3687 // Ensure it is initialized 3688 k->initialize(CHECK_NH); 3689 return k->allocate_instance_handle(THREAD); 3690 } 3691 3692 3693 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3694 oop mirror = value->pool_holder()->java_mirror(); 3695 // Save the mirror to get back the constant pool. 3696 reflect->obj_field_put(_oop_offset, mirror); 3697 } 3698 3699 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3700 3701 oop mirror = reflect->obj_field(_oop_offset); 3702 Klass* k = java_lang_Class::as_Klass(mirror); 3703 assert(k->is_instance_klass(), "Must be"); 3704 3705 // Get the constant pool back from the klass. Since class redefinition 3706 // merges the new constant pool into the old, this is essentially the 3707 // same constant pool as the original. If constant pool merging is 3708 // no longer done in the future, this will have to change to save 3709 // the original. 3710 return InstanceKlass::cast(k)->constants(); 3711 } 3712 3713 3714 // Support for java_lang_ref_Reference 3715 3716 bool java_lang_ref_Reference::_offsets_initialized; 3717 3718 int java_lang_ref_Reference::_referent_offset; 3719 int java_lang_ref_Reference::_queue_offset; 3720 int java_lang_ref_Reference::_next_offset; 3721 int java_lang_ref_Reference::_discovered_offset; 3722 3723 #define REFERENCE_FIELDS_DO(macro) \ 3724 macro(_referent_offset, k, "referent", object_signature, false); \ 3725 macro(_queue_offset, k, "queue", referencequeue_signature, false); \ 3726 macro(_next_offset, k, "next", reference_signature, false); \ 3727 macro(_discovered_offset, k, "discovered", reference_signature, false); 3728 3729 void java_lang_ref_Reference::compute_offsets() { 3730 if (_offsets_initialized) { 3731 return; 3732 } 3733 _offsets_initialized = true; 3734 InstanceKlass* k = vmClasses::Reference_klass(); 3735 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3736 } 3737 3738 #if INCLUDE_CDS 3739 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) { 3740 f->do_bool(&_offsets_initialized); 3741 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3742 } 3743 #endif 3744 3745 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3746 assert(obj != nullptr, "sanity"); 3747 if (offset != _referent_offset) { 3748 return false; 3749 } 3750 3751 Klass* k = obj->klass(); 3752 if (!k->is_instance_klass()) { 3753 return false; 3754 } 3755 3756 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3757 bool is_reference = ik->reference_type() != REF_NONE; 3758 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity"); 3759 return is_reference; 3760 } 3761 3762 int java_lang_boxing_object::_value_offset; 3763 int java_lang_boxing_object::_long_value_offset; 3764 3765 #define BOXING_FIELDS_DO(macro) \ 3766 macro(_value_offset, integerKlass, "value", int_signature, false); \ 3767 macro(_long_value_offset, longKlass, "value", long_signature, false); 3768 3769 void java_lang_boxing_object::compute_offsets() { 3770 InstanceKlass* integerKlass = vmClasses::Integer_klass(); 3771 InstanceKlass* longKlass = vmClasses::Long_klass(); 3772 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3773 } 3774 3775 #if INCLUDE_CDS 3776 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) { 3777 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3778 } 3779 #endif 3780 3781 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 3782 Klass* k = vmClasses::box_klass(type); 3783 if (k == nullptr) return nullptr; 3784 InstanceKlass* ik = InstanceKlass::cast(k); 3785 if (!ik->is_initialized()) { 3786 ik->initialize(CHECK_NULL); 3787 } 3788 return ik->allocate_instance(THREAD); 3789 } 3790 3791 3792 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 3793 oop box = initialize_and_allocate(type, CHECK_NULL); 3794 if (box == nullptr) return nullptr; 3795 switch (type) { 3796 case T_BOOLEAN: 3797 box->bool_field_put(_value_offset, value->z); 3798 break; 3799 case T_CHAR: 3800 box->char_field_put(_value_offset, value->c); 3801 break; 3802 case T_FLOAT: 3803 box->float_field_put(_value_offset, value->f); 3804 break; 3805 case T_DOUBLE: 3806 box->double_field_put(_long_value_offset, value->d); 3807 break; 3808 case T_BYTE: 3809 box->byte_field_put(_value_offset, value->b); 3810 break; 3811 case T_SHORT: 3812 box->short_field_put(_value_offset, value->s); 3813 break; 3814 case T_INT: 3815 box->int_field_put(_value_offset, value->i); 3816 break; 3817 case T_LONG: 3818 box->long_field_put(_long_value_offset, value->j); 3819 break; 3820 default: 3821 return nullptr; 3822 } 3823 return box; 3824 } 3825 3826 3827 BasicType java_lang_boxing_object::basic_type(oop box) { 3828 if (box == nullptr) return T_ILLEGAL; 3829 BasicType type = vmClasses::box_klass_type(box->klass()); 3830 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 3831 return T_ILLEGAL; 3832 return type; 3833 } 3834 3835 3836 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 3837 BasicType type = vmClasses::box_klass_type(box->klass()); 3838 switch (type) { 3839 case T_BOOLEAN: 3840 value->z = box->bool_field(_value_offset); 3841 break; 3842 case T_CHAR: 3843 value->c = box->char_field(_value_offset); 3844 break; 3845 case T_FLOAT: 3846 value->f = box->float_field(_value_offset); 3847 break; 3848 case T_DOUBLE: 3849 value->d = box->double_field(_long_value_offset); 3850 break; 3851 case T_BYTE: 3852 value->b = box->byte_field(_value_offset); 3853 break; 3854 case T_SHORT: 3855 value->s = box->short_field(_value_offset); 3856 break; 3857 case T_INT: 3858 value->i = box->int_field(_value_offset); 3859 break; 3860 case T_LONG: 3861 value->j = box->long_field(_long_value_offset); 3862 break; 3863 default: 3864 return T_ILLEGAL; 3865 } // end switch 3866 return type; 3867 } 3868 3869 3870 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3871 BasicType type = vmClasses::box_klass_type(box->klass()); 3872 switch (type) { 3873 case T_BOOLEAN: 3874 box->bool_field_put(_value_offset, value->z); 3875 break; 3876 case T_CHAR: 3877 box->char_field_put(_value_offset, value->c); 3878 break; 3879 case T_FLOAT: 3880 box->float_field_put(_value_offset, value->f); 3881 break; 3882 case T_DOUBLE: 3883 box->double_field_put(_long_value_offset, value->d); 3884 break; 3885 case T_BYTE: 3886 box->byte_field_put(_value_offset, value->b); 3887 break; 3888 case T_SHORT: 3889 box->short_field_put(_value_offset, value->s); 3890 break; 3891 case T_INT: 3892 box->int_field_put(_value_offset, value->i); 3893 break; 3894 case T_LONG: 3895 box->long_field_put(_long_value_offset, value->j); 3896 break; 3897 default: 3898 return T_ILLEGAL; 3899 } // end switch 3900 return type; 3901 } 3902 3903 3904 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3905 switch (type) { 3906 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3907 case T_CHAR: st->print("%d", value->c); break; 3908 case T_BYTE: st->print("%d", value->b); break; 3909 case T_SHORT: st->print("%d", value->s); break; 3910 case T_INT: st->print("%d", value->i); break; 3911 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 3912 case T_FLOAT: st->print("%f", value->f); break; 3913 case T_DOUBLE: st->print("%lf", value->d); break; 3914 default: st->print("type %d?", type); break; 3915 } 3916 } 3917 3918 3919 // Support for java_lang_ref_SoftReference 3920 // 3921 3922 int java_lang_ref_SoftReference::_timestamp_offset; 3923 int java_lang_ref_SoftReference::_static_clock_offset; 3924 3925 #define SOFTREFERENCE_FIELDS_DO(macro) \ 3926 macro(_timestamp_offset, k, "timestamp", long_signature, false); \ 3927 macro(_static_clock_offset, k, "clock", long_signature, true) 3928 3929 void java_lang_ref_SoftReference::compute_offsets() { 3930 InstanceKlass* k = vmClasses::SoftReference_klass(); 3931 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3932 } 3933 3934 #if INCLUDE_CDS 3935 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) { 3936 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3937 } 3938 #endif 3939 3940 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3941 return ref->long_field(_timestamp_offset); 3942 } 3943 3944 jlong java_lang_ref_SoftReference::clock() { 3945 InstanceKlass* ik = vmClasses::SoftReference_klass(); 3946 oop base = ik->static_field_base_raw(); 3947 return base->long_field(_static_clock_offset); 3948 } 3949 3950 void java_lang_ref_SoftReference::set_clock(jlong value) { 3951 InstanceKlass* ik = vmClasses::SoftReference_klass(); 3952 oop base = ik->static_field_base_raw(); 3953 base->long_field_put(_static_clock_offset, value); 3954 } 3955 3956 // Support for java_lang_invoke_DirectMethodHandle 3957 3958 int java_lang_invoke_DirectMethodHandle::_member_offset; 3959 3960 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3961 oop member_name = nullptr; 3962 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 3963 "a DirectMethodHandle oop is expected"); 3964 return dmh->obj_field(_member_offset); 3965 } 3966 3967 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 3968 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 3969 3970 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3971 InstanceKlass* k = vmClasses::DirectMethodHandle_klass(); 3972 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3973 } 3974 3975 #if INCLUDE_CDS 3976 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) { 3977 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3978 } 3979 #endif 3980 3981 // Support for java_lang_invoke_MethodHandle 3982 3983 int java_lang_invoke_MethodHandle::_type_offset; 3984 int java_lang_invoke_MethodHandle::_form_offset; 3985 3986 int java_lang_invoke_MemberName::_clazz_offset; 3987 int java_lang_invoke_MemberName::_name_offset; 3988 int java_lang_invoke_MemberName::_type_offset; 3989 int java_lang_invoke_MemberName::_flags_offset; 3990 int java_lang_invoke_MemberName::_method_offset; 3991 int java_lang_invoke_MemberName::_vmindex_offset; 3992 3993 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 3994 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 3995 3996 int java_lang_invoke_LambdaForm::_vmentry_offset; 3997 3998 #define METHODHANDLE_FIELDS_DO(macro) \ 3999 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 4000 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 4001 4002 void java_lang_invoke_MethodHandle::compute_offsets() { 4003 InstanceKlass* k = vmClasses::MethodHandle_klass(); 4004 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4005 } 4006 4007 #if INCLUDE_CDS 4008 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) { 4009 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4010 } 4011 #endif 4012 4013 #define MEMBERNAME_FIELDS_DO(macro) \ 4014 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 4015 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 4016 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 4017 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 4018 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 4019 4020 void java_lang_invoke_MemberName::compute_offsets() { 4021 InstanceKlass* k = vmClasses::MemberName_klass(); 4022 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4023 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4024 } 4025 4026 #if INCLUDE_CDS 4027 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) { 4028 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4029 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4030 } 4031 #endif 4032 4033 #define RESOLVEDMETHOD_FIELDS_DO(macro) \ 4034 macro(_vmholder_offset, k, "vmholder", class_signature, false) 4035 4036 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 4037 InstanceKlass* k = vmClasses::ResolvedMethodName_klass(); 4038 assert(k != nullptr, "jdk mismatch"); 4039 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4040 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4041 } 4042 4043 #if INCLUDE_CDS 4044 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) { 4045 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4046 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4047 } 4048 #endif 4049 4050 #define LAMBDAFORM_FIELDS_DO(macro) \ 4051 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 4052 4053 void java_lang_invoke_LambdaForm::compute_offsets() { 4054 InstanceKlass* k = vmClasses::LambdaForm_klass(); 4055 assert (k != nullptr, "jdk mismatch"); 4056 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4057 } 4058 4059 #if INCLUDE_CDS 4060 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) { 4061 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4062 } 4063 #endif 4064 4065 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 4066 return obj != nullptr && is_subclass(obj->klass()); 4067 } 4068 4069 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset; 4070 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset; 4071 4072 #define NEP_FIELDS_DO(macro) \ 4073 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \ 4074 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false); 4075 4076 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) { 4077 return obj != nullptr && is_subclass(obj->klass()); 4078 } 4079 4080 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() { 4081 InstanceKlass* k = vmClasses::NativeEntryPoint_klass(); 4082 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4083 } 4084 4085 #if INCLUDE_CDS 4086 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) { 4087 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4088 } 4089 #endif 4090 4091 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) { 4092 return entry->obj_field(_method_type_offset); 4093 } 4094 4095 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) { 4096 return entry->long_field(_downcall_stub_address_offset); 4097 } 4098 4099 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset; 4100 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset; 4101 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset; 4102 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset; 4103 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset; 4104 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset; 4105 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset; 4106 4107 #define ABIDescriptor_FIELDS_DO(macro) \ 4108 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4109 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4110 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4111 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \ 4112 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \ 4113 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \ 4114 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false); 4115 4116 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) { 4117 return obj != nullptr && is_subclass(obj->klass()); 4118 } 4119 4120 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() { 4121 InstanceKlass* k = vmClasses::ABIDescriptor_klass(); 4122 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4123 } 4124 4125 #if INCLUDE_CDS 4126 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) { 4127 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4128 } 4129 #endif 4130 4131 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) { 4132 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset)); 4133 } 4134 4135 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) { 4136 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset)); 4137 } 4138 4139 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) { 4140 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset)); 4141 } 4142 4143 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) { 4144 return entry->int_field(_stackAlignment_offset); 4145 } 4146 4147 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) { 4148 return entry->int_field(_shadowSpace_offset); 4149 } 4150 4151 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) { 4152 return entry->obj_field(_scratch1_offset); 4153 } 4154 4155 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) { 4156 return entry->obj_field(_scratch2_offset); 4157 } 4158 4159 int jdk_internal_foreign_abi_VMStorage::_type_offset; 4160 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset; 4161 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset; 4162 int jdk_internal_foreign_abi_VMStorage::_debugName_offset; 4163 4164 #define VMStorage_FIELDS_DO(macro) \ 4165 macro(_type_offset, k, "type", byte_signature, false); \ 4166 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \ 4167 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \ 4168 macro(_debugName_offset, k, "debugName", string_signature, false); \ 4169 4170 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) { 4171 return obj != nullptr && is_subclass(obj->klass()); 4172 } 4173 4174 void jdk_internal_foreign_abi_VMStorage::compute_offsets() { 4175 InstanceKlass* k = vmClasses::VMStorage_klass(); 4176 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4177 } 4178 4179 #if INCLUDE_CDS 4180 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) { 4181 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4182 } 4183 #endif 4184 4185 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) { 4186 return entry->byte_field(_type_offset); 4187 } 4188 4189 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) { 4190 return entry->int_field(_indexOrOffset_offset); 4191 } 4192 4193 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) { 4194 return entry->short_field(_segmentMaskOrSize_offset); 4195 } 4196 4197 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) { 4198 return entry->obj_field(_debugName_offset); 4199 } 4200 4201 int jdk_internal_foreign_abi_CallConv::_argRegs_offset; 4202 int jdk_internal_foreign_abi_CallConv::_retRegs_offset; 4203 4204 #define CallConv_FIELDS_DO(macro) \ 4205 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \ 4206 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \ 4207 4208 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) { 4209 return obj != nullptr && is_subclass(obj->klass()); 4210 } 4211 4212 void jdk_internal_foreign_abi_CallConv::compute_offsets() { 4213 InstanceKlass* k = vmClasses::CallConv_klass(); 4214 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4215 } 4216 4217 #if INCLUDE_CDS 4218 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) { 4219 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4220 } 4221 #endif 4222 4223 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) { 4224 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset)); 4225 } 4226 4227 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) { 4228 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset)); 4229 } 4230 4231 oop java_lang_invoke_MethodHandle::type(oop mh) { 4232 return mh->obj_field(_type_offset); 4233 } 4234 4235 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 4236 mh->obj_field_put(_type_offset, mtype); 4237 } 4238 4239 oop java_lang_invoke_MethodHandle::form(oop mh) { 4240 assert(_form_offset != 0, ""); 4241 return mh->obj_field(_form_offset); 4242 } 4243 4244 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 4245 assert(_form_offset != 0, ""); 4246 mh->obj_field_put(_form_offset, lform); 4247 } 4248 4249 /// MemberName accessors 4250 4251 oop java_lang_invoke_MemberName::clazz(oop mname) { 4252 assert(is_instance(mname), "wrong type"); 4253 return mname->obj_field(_clazz_offset); 4254 } 4255 4256 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 4257 assert(is_instance(mname), "wrong type"); 4258 mname->obj_field_put(_clazz_offset, clazz); 4259 } 4260 4261 oop java_lang_invoke_MemberName::name(oop mname) { 4262 assert(is_instance(mname), "wrong type"); 4263 return mname->obj_field(_name_offset); 4264 } 4265 4266 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 4267 assert(is_instance(mname), "wrong type"); 4268 mname->obj_field_put(_name_offset, name); 4269 } 4270 4271 oop java_lang_invoke_MemberName::type(oop mname) { 4272 assert(is_instance(mname), "wrong type"); 4273 return mname->obj_field(_type_offset); 4274 } 4275 4276 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 4277 assert(is_instance(mname), "wrong type"); 4278 mname->obj_field_put(_type_offset, type); 4279 } 4280 4281 int java_lang_invoke_MemberName::flags(oop mname) { 4282 assert(is_instance(mname), "wrong type"); 4283 return mname->int_field(_flags_offset); 4284 } 4285 4286 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 4287 assert(is_instance(mname), "wrong type"); 4288 mname->int_field_put(_flags_offset, flags); 4289 } 4290 4291 4292 // Return vmtarget from ResolvedMethodName method field through indirection 4293 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 4294 assert(is_instance(mname), "wrong type"); 4295 oop method = mname->obj_field(_method_offset); 4296 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method); 4297 } 4298 4299 bool java_lang_invoke_MemberName::is_method(oop mname) { 4300 assert(is_instance(mname), "must be MemberName"); 4301 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 4302 } 4303 4304 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 4305 assert(is_instance(mname), "wrong type"); 4306 mname->obj_field_put(_method_offset, resolved_method); 4307 } 4308 4309 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 4310 assert(is_instance(mname), "wrong type"); 4311 return (intptr_t) mname->address_field(_vmindex_offset); 4312 } 4313 4314 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 4315 assert(is_instance(mname), "wrong type"); 4316 mname->address_field_put(_vmindex_offset, (address) index); 4317 } 4318 4319 4320 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 4321 assert(is_instance(resolved_method), "wrong type"); 4322 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 4323 assert(m->is_method(), "must be"); 4324 return m; 4325 } 4326 4327 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 4328 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 4329 assert(is_instance(resolved_method), "wrong type"); 4330 resolved_method->address_field_put(_vmtarget_offset, (address)m); 4331 } 4332 4333 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) { 4334 assert(is_instance(resolved_method), "wrong type"); 4335 resolved_method->obj_field_put(_vmholder_offset, holder); 4336 } 4337 4338 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 4339 const Method* method = m(); 4340 4341 // lookup ResolvedMethod oop in the table, or create a new one and intern it 4342 oop resolved_method = ResolvedMethodTable::find_method(method); 4343 if (resolved_method != nullptr) { 4344 return resolved_method; 4345 } 4346 4347 InstanceKlass* k = vmClasses::ResolvedMethodName_klass(); 4348 if (!k->is_initialized()) { 4349 k->initialize(CHECK_NULL); 4350 } 4351 4352 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 4353 4354 NoSafepointVerifier nsv; 4355 4356 if (method->is_old()) { 4357 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() : 4358 method->get_new_method(); 4359 } 4360 4361 InstanceKlass* holder = method->method_holder(); 4362 4363 set_vmtarget(new_resolved_method, const_cast<Method*>(method)); 4364 // Add a reference to the loader (actually mirror because hidden classes may not have 4365 // distinct loaders) to ensure the metadata is kept alive. 4366 // This mirror may be different than the one in clazz field. 4367 set_vmholder(new_resolved_method, holder->java_mirror()); 4368 4369 // Set flag in class to indicate this InstanceKlass has entries in the table 4370 // to avoid walking table during redefinition if none of the redefined classes 4371 // have any membernames in the table. 4372 holder->set_has_resolved_methods(); 4373 4374 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method)); 4375 } 4376 4377 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 4378 assert(is_instance(lform), "wrong type"); 4379 return lform->obj_field(_vmentry_offset); 4380 } 4381 4382 4383 // Support for java_lang_invoke_MethodType 4384 4385 int java_lang_invoke_MethodType::_rtype_offset; 4386 int java_lang_invoke_MethodType::_ptypes_offset; 4387 4388 #define METHODTYPE_FIELDS_DO(macro) \ 4389 macro(_rtype_offset, k, "rtype", class_signature, false); \ 4390 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 4391 4392 void java_lang_invoke_MethodType::compute_offsets() { 4393 InstanceKlass* k = vmClasses::MethodType_klass(); 4394 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4395 } 4396 4397 #if INCLUDE_CDS 4398 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) { 4399 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4400 } 4401 #endif 4402 4403 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 4404 st->print("("); 4405 objArrayOop pts = ptypes(mt); 4406 if (pts != nullptr) { 4407 for (int i = 0, limit = pts->length(); i < limit; i++) { 4408 java_lang_Class::print_signature(pts->obj_at(i), st); 4409 } 4410 } else { 4411 st->print("null"); 4412 } 4413 st->print(")"); 4414 oop rt = rtype(mt); 4415 if (rt != nullptr) { 4416 java_lang_Class::print_signature(rt, st); 4417 } else { 4418 st->print("null"); 4419 } 4420 } 4421 4422 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) { 4423 ResourceMark rm; 4424 stringStream buffer(128); 4425 print_signature(mt, &buffer); 4426 const char* sigstr = buffer.base(); 4427 int siglen = (int) buffer.size(); 4428 Symbol *name; 4429 if (!intern_if_not_found) { 4430 name = SymbolTable::probe(sigstr, siglen); 4431 } else { 4432 name = SymbolTable::new_symbol(sigstr, siglen); 4433 } 4434 return name; 4435 } 4436 4437 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 4438 if (mt1 == mt2) 4439 return true; 4440 if (rtype(mt1) != rtype(mt2)) 4441 return false; 4442 if (ptype_count(mt1) != ptype_count(mt2)) 4443 return false; 4444 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 4445 if (ptype(mt1, i) != ptype(mt2, i)) 4446 return false; 4447 } 4448 return true; 4449 } 4450 4451 oop java_lang_invoke_MethodType::rtype(oop mt) { 4452 assert(is_instance(mt), "must be a MethodType"); 4453 return mt->obj_field(_rtype_offset); 4454 } 4455 4456 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 4457 assert(is_instance(mt), "must be a MethodType"); 4458 return (objArrayOop) mt->obj_field(_ptypes_offset); 4459 } 4460 4461 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 4462 return ptypes(mt)->obj_at(idx); 4463 } 4464 4465 int java_lang_invoke_MethodType::ptype_count(oop mt) { 4466 return ptypes(mt)->length(); 4467 } 4468 4469 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 4470 objArrayOop pts = ptypes(mt); 4471 int count = pts->length(); 4472 int slots = 0; 4473 for (int i = 0; i < count; i++) { 4474 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 4475 slots += type2size[bt]; 4476 } 4477 return slots; 4478 } 4479 4480 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 4481 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 4482 return type2size[bt]; 4483 } 4484 4485 4486 // Support for java_lang_invoke_CallSite 4487 4488 int java_lang_invoke_CallSite::_target_offset; 4489 int java_lang_invoke_CallSite::_context_offset; 4490 4491 #define CALLSITE_FIELDS_DO(macro) \ 4492 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 4493 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false) 4494 4495 void java_lang_invoke_CallSite::compute_offsets() { 4496 InstanceKlass* k = vmClasses::CallSite_klass(); 4497 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4498 } 4499 4500 #if INCLUDE_CDS 4501 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) { 4502 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4503 } 4504 #endif 4505 4506 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) { 4507 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 4508 4509 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset); 4510 return dep_oop; 4511 } 4512 4513 // Support for java_lang_invoke_ConstantCallSite 4514 4515 int java_lang_invoke_ConstantCallSite::_is_frozen_offset; 4516 4517 #define CONSTANTCALLSITE_FIELDS_DO(macro) \ 4518 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false) 4519 4520 void java_lang_invoke_ConstantCallSite::compute_offsets() { 4521 InstanceKlass* k = vmClasses::ConstantCallSite_klass(); 4522 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4523 } 4524 4525 #if INCLUDE_CDS 4526 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) { 4527 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4528 } 4529 #endif 4530 4531 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 4532 4533 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 4534 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset; 4535 4536 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 4537 InstanceKlass* k = vmClasses::Context_klass(); 4538 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4539 } 4540 4541 #if INCLUDE_CDS 4542 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) { 4543 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4544 } 4545 #endif 4546 4547 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 4548 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 4549 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset); 4550 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset); 4551 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr); 4552 return dep_ctx; 4553 } 4554 4555 // Support for java_security_AccessControlContext 4556 4557 int java_security_AccessControlContext::_context_offset; 4558 int java_security_AccessControlContext::_privilegedContext_offset; 4559 int java_security_AccessControlContext::_isPrivileged_offset; 4560 int java_security_AccessControlContext::_isAuthorized_offset; 4561 4562 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \ 4563 macro(_context_offset, k, "context", protectiondomain_signature, false); \ 4564 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \ 4565 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \ 4566 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false) 4567 4568 void java_security_AccessControlContext::compute_offsets() { 4569 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 4570 InstanceKlass* k = vmClasses::AccessControlContext_klass(); 4571 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4572 } 4573 4574 #if INCLUDE_CDS 4575 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) { 4576 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4577 } 4578 #endif 4579 4580 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 4581 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 4582 assert(_isAuthorized_offset != 0, "offsets should have been initialized"); 4583 // Ensure klass is initialized 4584 vmClasses::AccessControlContext_klass()->initialize(CHECK_NULL); 4585 // Allocate result 4586 oop result = vmClasses::AccessControlContext_klass()->allocate_instance(CHECK_NULL); 4587 // Fill in values 4588 result->obj_field_put(_context_offset, context()); 4589 result->obj_field_put(_privilegedContext_offset, privileged_context()); 4590 result->bool_field_put(_isPrivileged_offset, isPrivileged); 4591 result->bool_field_put(_isAuthorized_offset, true); 4592 return result; 4593 } 4594 4595 4596 // Support for java_lang_ClassLoader 4597 4598 int java_lang_ClassLoader::_loader_data_offset; 4599 int java_lang_ClassLoader::_parallelCapable_offset; 4600 int java_lang_ClassLoader::_name_offset; 4601 int java_lang_ClassLoader::_nameAndId_offset; 4602 int java_lang_ClassLoader::_unnamedModule_offset; 4603 int java_lang_ClassLoader::_parent_offset; 4604 4605 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) { 4606 assert(loader != nullptr, "loader must not be null"); 4607 assert(oopDesc::is_oop(loader), "loader must be oop"); 4608 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset)); 4609 } 4610 4611 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 4612 assert(loader != nullptr, "loader must not be null"); 4613 assert(oopDesc::is_oop(loader), "loader must be oop"); 4614 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset); 4615 } 4616 4617 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) { 4618 assert(loader != nullptr, "loader must not be null"); 4619 assert(oopDesc::is_oop(loader), "loader must be oop"); 4620 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data); 4621 } 4622 4623 #define CLASSLOADER_FIELDS_DO(macro) \ 4624 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 4625 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 4626 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \ 4627 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 4628 macro(_parent_offset, k1, "parent", classloader_signature, false) 4629 4630 void java_lang_ClassLoader::compute_offsets() { 4631 InstanceKlass* k1 = vmClasses::ClassLoader_klass(); 4632 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4633 4634 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4635 } 4636 4637 #if INCLUDE_CDS 4638 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) { 4639 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4640 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4641 } 4642 #endif 4643 4644 oop java_lang_ClassLoader::parent(oop loader) { 4645 assert(is_instance(loader), "loader must be oop"); 4646 return loader->obj_field(_parent_offset); 4647 } 4648 4649 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) { 4650 assert(is_instance(loader), "loader must be oop"); 4651 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset); 4652 } 4653 4654 // Returns the name field of this class loader. If the name field has not 4655 // been set, null will be returned. 4656 oop java_lang_ClassLoader::name(oop loader) { 4657 assert(is_instance(loader), "loader must be oop"); 4658 return loader->obj_field(_name_offset); 4659 } 4660 4661 // Returns the nameAndId field of this class loader. The format is 4662 // as follows: 4663 // If the defining loader has a name explicitly set then '<loader-name>' @<id> 4664 // If the defining loader has no name then <qualified-class-name> @<id> 4665 // If built-in loader, then omit '@<id>' as there is only one instance. 4666 // Use ClassLoader::loader_name_id() to obtain this String as a char*. 4667 oop java_lang_ClassLoader::nameAndId(oop loader) { 4668 assert(is_instance(loader), "loader must be oop"); 4669 return loader->obj_field(_nameAndId_offset); 4670 } 4671 4672 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 4673 assert(is_instance(loader), "loader must be oop"); 4674 assert(cl == nullptr || is_instance(cl), "cl argument must be oop"); 4675 oop acl = loader; 4676 debug_only(jint loop_count = 0); 4677 // This loop taken verbatim from ClassLoader.java: 4678 do { 4679 acl = parent(acl); 4680 if (cl == acl) { 4681 return true; 4682 } 4683 assert(++loop_count > 0, "loop_count overflow"); 4684 } while (acl != nullptr); 4685 return false; 4686 } 4687 4688 bool java_lang_ClassLoader::is_instance(oop obj) { 4689 return obj != nullptr && is_subclass(obj->klass()); 4690 } 4691 4692 4693 // For class loader classes, parallelCapable defined 4694 // based on non-null field 4695 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 4696 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 4697 assert(_parallelCapable_offset != 0, "offsets should have been initialized"); 4698 return (class_loader->obj_field(_parallelCapable_offset) != nullptr); 4699 } 4700 4701 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 4702 // Fix for 4474172; see evaluation for more details 4703 loader = non_reflection_class_loader(loader); 4704 4705 oop cl = SystemDictionary::java_system_loader(); 4706 while(cl != nullptr) { 4707 if (cl == loader) return true; 4708 cl = parent(cl); 4709 } 4710 return false; 4711 } 4712 4713 // Return true if this is one of the class loaders associated with 4714 // the generated bytecodes for serialization constructor returned 4715 // by sun.reflect.ReflectionFactory::newConstructorForSerialization 4716 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 4717 if (loader != nullptr) { 4718 Klass* delegating_cl_class = vmClasses::reflect_DelegatingClassLoader_klass(); 4719 // This might be null in non-1.4 JDKs 4720 return (delegating_cl_class != nullptr && loader->is_a(delegating_cl_class)); 4721 } 4722 return false; 4723 } 4724 4725 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 4726 // See whether this is one of the class loaders associated with 4727 // the generated bytecodes for reflection, and if so, "magically" 4728 // delegate to its parent to prevent class loading from occurring 4729 // in places where applications using reflection didn't expect it. 4730 if (is_reflection_class_loader(loader)) { 4731 return parent(loader); 4732 } 4733 return loader; 4734 } 4735 4736 oop java_lang_ClassLoader::unnamedModule(oop loader) { 4737 assert(is_instance(loader), "loader must be oop"); 4738 return loader->obj_field(_unnamedModule_offset); 4739 } 4740 4741 // Support for java_lang_System 4742 // 4743 4744 int java_lang_System::_static_in_offset; 4745 int java_lang_System::_static_out_offset; 4746 int java_lang_System::_static_err_offset; 4747 int java_lang_System::_static_security_offset; 4748 int java_lang_System::_static_allow_security_offset; 4749 int java_lang_System::_static_never_offset; 4750 4751 #define SYSTEM_FIELDS_DO(macro) \ 4752 macro(_static_in_offset, k, "in", input_stream_signature, true); \ 4753 macro(_static_out_offset, k, "out", print_stream_signature, true); \ 4754 macro(_static_err_offset, k, "err", print_stream_signature, true); \ 4755 macro(_static_security_offset, k, "security", security_manager_signature, true); \ 4756 macro(_static_allow_security_offset, k, "allowSecurityManager", int_signature, true); \ 4757 macro(_static_never_offset, k, "NEVER", int_signature, true) 4758 4759 void java_lang_System::compute_offsets() { 4760 InstanceKlass* k = vmClasses::System_klass(); 4761 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4762 } 4763 4764 // This field tells us that a security manager can never be installed so we 4765 // can completely skip populating the ProtectionDomainCacheTable. 4766 bool java_lang_System::allow_security_manager() { 4767 static int initialized = false; 4768 static bool allowed = true; // default 4769 if (!initialized) { 4770 oop base = vmClasses::System_klass()->static_field_base_raw(); 4771 int never = base->int_field(_static_never_offset); 4772 allowed = (base->int_field(_static_allow_security_offset) != never); 4773 initialized = true; 4774 } 4775 return allowed; 4776 } 4777 4778 // This field tells us that a security manager is installed. 4779 bool java_lang_System::has_security_manager() { 4780 oop base = vmClasses::System_klass()->static_field_base_raw(); 4781 return base->obj_field(_static_security_offset) != nullptr; 4782 } 4783 4784 #if INCLUDE_CDS 4785 void java_lang_System::serialize_offsets(SerializeClosure* f) { 4786 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4787 } 4788 #endif 4789 4790 // Support for jdk_internal_misc_UnsafeConstants 4791 // 4792 class UnsafeConstantsFixup : public FieldClosure { 4793 private: 4794 int _address_size; 4795 int _page_size; 4796 bool _big_endian; 4797 bool _use_unaligned_access; 4798 int _data_cache_line_flush_size; 4799 public: 4800 UnsafeConstantsFixup() { 4801 // round up values for all static final fields 4802 _address_size = sizeof(void*); 4803 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size()); 4804 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true); 4805 _use_unaligned_access = UseUnalignedAccesses; 4806 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size(); 4807 } 4808 4809 void do_field(fieldDescriptor* fd) { 4810 oop mirror = fd->field_holder()->java_mirror(); 4811 assert(mirror != nullptr, "UnsafeConstants must have mirror already"); 4812 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants"); 4813 assert(fd->is_final(), "fields of UnsafeConstants must be final"); 4814 assert(fd->is_static(), "fields of UnsafeConstants must be static"); 4815 if (fd->name() == vmSymbols::address_size_name()) { 4816 mirror->int_field_put(fd->offset(), _address_size); 4817 } else if (fd->name() == vmSymbols::page_size_name()) { 4818 mirror->int_field_put(fd->offset(), _page_size); 4819 } else if (fd->name() == vmSymbols::big_endian_name()) { 4820 mirror->bool_field_put(fd->offset(), _big_endian); 4821 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) { 4822 mirror->bool_field_put(fd->offset(), _use_unaligned_access); 4823 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) { 4824 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size); 4825 } else { 4826 assert(false, "unexpected UnsafeConstants field"); 4827 } 4828 } 4829 }; 4830 4831 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() { 4832 UnsafeConstantsFixup fixup; 4833 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup); 4834 } 4835 4836 4837 // java_lang_StackTraceElement 4838 4839 int java_lang_StackTraceElement::_methodName_offset; 4840 int java_lang_StackTraceElement::_fileName_offset; 4841 int java_lang_StackTraceElement::_lineNumber_offset; 4842 int java_lang_StackTraceElement::_moduleName_offset; 4843 int java_lang_StackTraceElement::_moduleVersion_offset; 4844 int java_lang_StackTraceElement::_classLoaderName_offset; 4845 int java_lang_StackTraceElement::_declaringClass_offset; 4846 int java_lang_StackTraceElement::_declaringClassObject_offset; 4847 4848 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4849 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4850 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4851 macro(_moduleName_offset, k, "moduleName", string_signature, false); \ 4852 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4853 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \ 4854 macro(_methodName_offset, k, "methodName", string_signature, false); \ 4855 macro(_fileName_offset, k, "fileName", string_signature, false); \ 4856 macro(_lineNumber_offset, k, "lineNumber", int_signature, false) 4857 4858 // Support for java_lang_StackTraceElement 4859 void java_lang_StackTraceElement::compute_offsets() { 4860 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 4861 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4862 } 4863 4864 #if INCLUDE_CDS 4865 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) { 4866 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4867 } 4868 #endif 4869 4870 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 4871 element->obj_field_put(_fileName_offset, value); 4872 } 4873 4874 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 4875 element->obj_field_put(_declaringClass_offset, value); 4876 } 4877 4878 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 4879 element->obj_field_put(_methodName_offset, value); 4880 } 4881 4882 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 4883 element->int_field_put(_lineNumber_offset, value); 4884 } 4885 4886 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 4887 element->obj_field_put(_moduleName_offset, value); 4888 } 4889 4890 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 4891 element->obj_field_put(_moduleVersion_offset, value); 4892 } 4893 4894 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 4895 element->obj_field_put(_classLoaderName_offset, value); 4896 } 4897 4898 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 4899 element->obj_field_put(_declaringClassObject_offset, value); 4900 } 4901 4902 4903 // java_lang_AssertionStatusDirectives 4904 4905 int java_lang_AssertionStatusDirectives::_classes_offset; 4906 int java_lang_AssertionStatusDirectives::_classEnabled_offset; 4907 int java_lang_AssertionStatusDirectives::_packages_offset; 4908 int java_lang_AssertionStatusDirectives::_packageEnabled_offset; 4909 int java_lang_AssertionStatusDirectives::_deflt_offset; 4910 4911 // Support for java Assertions - java_lang_AssertionStatusDirectives. 4912 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 4913 macro(_classes_offset, k, "classes", string_array_signature, false); \ 4914 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 4915 macro(_packages_offset, k, "packages", string_array_signature, false); \ 4916 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 4917 macro(_deflt_offset, k, "deflt", bool_signature, false) 4918 4919 void java_lang_AssertionStatusDirectives::compute_offsets() { 4920 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass(); 4921 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4922 } 4923 4924 #if INCLUDE_CDS 4925 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) { 4926 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4927 } 4928 #endif 4929 4930 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 4931 o->obj_field_put(_classes_offset, val); 4932 } 4933 4934 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 4935 o->obj_field_put(_classEnabled_offset, val); 4936 } 4937 4938 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 4939 o->obj_field_put(_packages_offset, val); 4940 } 4941 4942 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 4943 o->obj_field_put(_packageEnabled_offset, val); 4944 } 4945 4946 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 4947 o->bool_field_put(_deflt_offset, val); 4948 } 4949 4950 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset; 4951 4952 #define AOS_FIELDS_DO(macro) \ 4953 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false) 4954 4955 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() { 4956 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass(); 4957 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4958 } 4959 4960 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 4961 assert(_owner_offset != 0, "Must be initialized"); 4962 return obj->obj_field(_owner_offset); 4963 } 4964 4965 #if INCLUDE_CDS 4966 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) { 4967 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4968 } 4969 #endif 4970 4971 int vector_VectorPayload::_payload_offset; 4972 4973 #define VECTORPAYLOAD_FIELDS_DO(macro) \ 4974 macro(_payload_offset, k, "payload", object_signature, false) 4975 4976 void vector_VectorPayload::compute_offsets() { 4977 InstanceKlass* k = vmClasses::vector_VectorPayload_klass(); 4978 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4979 } 4980 4981 #if INCLUDE_CDS 4982 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) { 4983 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4984 } 4985 #endif 4986 4987 void vector_VectorPayload::set_payload(oop o, oop val) { 4988 o->obj_field_put(_payload_offset, val); 4989 } 4990 4991 bool vector_VectorPayload::is_instance(oop obj) { 4992 return obj != nullptr && is_subclass(obj->klass()); 4993 } 4994 4995 int java_lang_Integer_IntegerCache::_static_cache_offset; 4996 int java_lang_Long_LongCache::_static_cache_offset; 4997 int java_lang_Character_CharacterCache::_static_cache_offset; 4998 int java_lang_Short_ShortCache::_static_cache_offset; 4999 int java_lang_Byte_ByteCache::_static_cache_offset; 5000 5001 #define INTEGER_CACHE_FIELDS_DO(macro) \ 5002 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true) 5003 5004 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) { 5005 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5006 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5007 } 5008 5009 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) { 5010 oop base = ik->static_field_base_raw(); 5011 return objArrayOop(base->obj_field(_static_cache_offset)); 5012 } 5013 5014 Symbol* java_lang_Integer_IntegerCache::symbol() { 5015 return vmSymbols::java_lang_Integer_IntegerCache(); 5016 } 5017 5018 #if INCLUDE_CDS 5019 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) { 5020 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5021 } 5022 #endif 5023 #undef INTEGER_CACHE_FIELDS_DO 5024 5025 jint java_lang_Integer::value(oop obj) { 5026 jvalue v; 5027 java_lang_boxing_object::get_value(obj, &v); 5028 return v.i; 5029 } 5030 5031 #define LONG_CACHE_FIELDS_DO(macro) \ 5032 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true) 5033 5034 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) { 5035 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5036 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5037 } 5038 5039 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) { 5040 oop base = ik->static_field_base_raw(); 5041 return objArrayOop(base->obj_field(_static_cache_offset)); 5042 } 5043 5044 Symbol* java_lang_Long_LongCache::symbol() { 5045 return vmSymbols::java_lang_Long_LongCache(); 5046 } 5047 5048 #if INCLUDE_CDS 5049 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) { 5050 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5051 } 5052 #endif 5053 #undef LONG_CACHE_FIELDS_DO 5054 5055 jlong java_lang_Long::value(oop obj) { 5056 jvalue v; 5057 java_lang_boxing_object::get_value(obj, &v); 5058 return v.j; 5059 } 5060 5061 #define CHARACTER_CACHE_FIELDS_DO(macro) \ 5062 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true) 5063 5064 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) { 5065 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5066 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5067 } 5068 5069 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) { 5070 oop base = ik->static_field_base_raw(); 5071 return objArrayOop(base->obj_field(_static_cache_offset)); 5072 } 5073 5074 Symbol* java_lang_Character_CharacterCache::symbol() { 5075 return vmSymbols::java_lang_Character_CharacterCache(); 5076 } 5077 5078 #if INCLUDE_CDS 5079 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) { 5080 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5081 } 5082 #endif 5083 #undef CHARACTER_CACHE_FIELDS_DO 5084 5085 jchar java_lang_Character::value(oop obj) { 5086 jvalue v; 5087 java_lang_boxing_object::get_value(obj, &v); 5088 return v.c; 5089 } 5090 5091 #define SHORT_CACHE_FIELDS_DO(macro) \ 5092 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true) 5093 5094 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) { 5095 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5096 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5097 } 5098 5099 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) { 5100 oop base = ik->static_field_base_raw(); 5101 return objArrayOop(base->obj_field(_static_cache_offset)); 5102 } 5103 5104 Symbol* java_lang_Short_ShortCache::symbol() { 5105 return vmSymbols::java_lang_Short_ShortCache(); 5106 } 5107 5108 #if INCLUDE_CDS 5109 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) { 5110 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5111 } 5112 #endif 5113 #undef SHORT_CACHE_FIELDS_DO 5114 5115 jshort java_lang_Short::value(oop obj) { 5116 jvalue v; 5117 java_lang_boxing_object::get_value(obj, &v); 5118 return v.s; 5119 } 5120 5121 #define BYTE_CACHE_FIELDS_DO(macro) \ 5122 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true) 5123 5124 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) { 5125 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5126 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5127 } 5128 5129 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) { 5130 oop base = ik->static_field_base_raw(); 5131 return objArrayOop(base->obj_field(_static_cache_offset)); 5132 } 5133 5134 Symbol* java_lang_Byte_ByteCache::symbol() { 5135 return vmSymbols::java_lang_Byte_ByteCache(); 5136 } 5137 5138 #if INCLUDE_CDS 5139 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) { 5140 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5141 } 5142 #endif 5143 #undef BYTE_CACHE_FIELDS_DO 5144 5145 jbyte java_lang_Byte::value(oop obj) { 5146 jvalue v; 5147 java_lang_boxing_object::get_value(obj, &v); 5148 return v.b; 5149 } 5150 5151 int java_lang_Boolean::_static_TRUE_offset; 5152 int java_lang_Boolean::_static_FALSE_offset; 5153 5154 #define BOOLEAN_FIELDS_DO(macro) \ 5155 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \ 5156 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true) 5157 5158 5159 void java_lang_Boolean::compute_offsets(InstanceKlass *k) { 5160 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5161 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5162 } 5163 5164 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) { 5165 oop base = ik->static_field_base_raw(); 5166 return base->obj_field(_static_TRUE_offset); 5167 } 5168 5169 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) { 5170 oop base = ik->static_field_base_raw(); 5171 return base->obj_field(_static_FALSE_offset); 5172 } 5173 5174 Symbol* java_lang_Boolean::symbol() { 5175 return vmSymbols::java_lang_Boolean(); 5176 } 5177 5178 #if INCLUDE_CDS 5179 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) { 5180 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5181 } 5182 #endif 5183 #undef BOOLEAN_CACHE_FIELDS_DO 5184 5185 jboolean java_lang_Boolean::value(oop obj) { 5186 jvalue v; 5187 java_lang_boxing_object::get_value(obj, &v); 5188 return v.z; 5189 } 5190 5191 // java_lang_reflect_RecordComponent 5192 5193 int java_lang_reflect_RecordComponent::_clazz_offset; 5194 int java_lang_reflect_RecordComponent::_name_offset; 5195 int java_lang_reflect_RecordComponent::_type_offset; 5196 int java_lang_reflect_RecordComponent::_accessor_offset; 5197 int java_lang_reflect_RecordComponent::_signature_offset; 5198 int java_lang_reflect_RecordComponent::_annotations_offset; 5199 int java_lang_reflect_RecordComponent::_typeAnnotations_offset; 5200 5201 #define RECORDCOMPONENT_FIELDS_DO(macro) \ 5202 macro(_clazz_offset, k, "clazz", class_signature, false); \ 5203 macro(_name_offset, k, "name", string_signature, false); \ 5204 macro(_type_offset, k, "type", class_signature, false); \ 5205 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \ 5206 macro(_signature_offset, k, "signature", string_signature, false); \ 5207 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \ 5208 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false); 5209 5210 // Support for java_lang_reflect_RecordComponent 5211 void java_lang_reflect_RecordComponent::compute_offsets() { 5212 InstanceKlass* k = vmClasses::RecordComponent_klass(); 5213 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5214 } 5215 5216 #if INCLUDE_CDS 5217 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) { 5218 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5219 } 5220 #endif 5221 5222 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) { 5223 element->obj_field_put(_clazz_offset, value); 5224 } 5225 5226 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) { 5227 element->obj_field_put(_name_offset, value); 5228 } 5229 5230 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) { 5231 element->obj_field_put(_type_offset, value); 5232 } 5233 5234 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) { 5235 element->obj_field_put(_accessor_offset, value); 5236 } 5237 5238 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) { 5239 element->obj_field_put(_signature_offset, value); 5240 } 5241 5242 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) { 5243 element->obj_field_put(_annotations_offset, value); 5244 } 5245 5246 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) { 5247 element->obj_field_put(_typeAnnotations_offset, value); 5248 } 5249 5250 // java_lang_InternalError 5251 int java_lang_InternalError::_during_unsafe_access_offset; 5252 5253 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) { 5254 internal_error->bool_field_put(_during_unsafe_access_offset, true); 5255 } 5256 5257 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) { 5258 return internal_error->bool_field(_during_unsafe_access_offset); 5259 } 5260 5261 void java_lang_InternalError::compute_offsets() { 5262 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 5263 } 5264 5265 #if INCLUDE_CDS 5266 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) { 5267 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 5268 } 5269 #endif 5270 5271 #define BASIC_JAVA_CLASSES_DO_PART1(f) \ 5272 f(java_lang_Class) \ 5273 f(java_lang_String) \ 5274 f(java_lang_ref_Reference) \ 5275 //end 5276 5277 #define BASIC_JAVA_CLASSES_DO_PART2(f) \ 5278 f(java_lang_System) \ 5279 f(java_lang_ClassLoader) \ 5280 f(java_lang_Throwable) \ 5281 f(java_lang_Thread) \ 5282 f(java_lang_Thread_FieldHolder) \ 5283 f(java_lang_Thread_Constants) \ 5284 f(java_lang_ThreadGroup) \ 5285 f(java_lang_VirtualThread) \ 5286 f(java_lang_InternalError) \ 5287 f(java_lang_AssertionStatusDirectives) \ 5288 f(java_lang_ref_SoftReference) \ 5289 f(java_lang_invoke_MethodHandle) \ 5290 f(java_lang_invoke_DirectMethodHandle) \ 5291 f(java_lang_invoke_MemberName) \ 5292 f(java_lang_invoke_ResolvedMethodName) \ 5293 f(java_lang_invoke_LambdaForm) \ 5294 f(java_lang_invoke_MethodType) \ 5295 f(java_lang_invoke_CallSite) \ 5296 f(java_lang_invoke_ConstantCallSite) \ 5297 f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \ 5298 f(java_security_AccessControlContext) \ 5299 f(java_lang_reflect_AccessibleObject) \ 5300 f(java_lang_reflect_Method) \ 5301 f(java_lang_reflect_Constructor) \ 5302 f(java_lang_reflect_Field) \ 5303 f(java_lang_reflect_RecordComponent) \ 5304 f(reflect_ConstantPool) \ 5305 f(java_lang_reflect_Parameter) \ 5306 f(java_lang_Module) \ 5307 f(java_lang_StackTraceElement) \ 5308 f(java_lang_ClassFrameInfo) \ 5309 f(java_lang_StackFrameInfo) \ 5310 f(java_lang_LiveStackFrameInfo) \ 5311 f(jdk_internal_vm_ContinuationScope) \ 5312 f(jdk_internal_vm_Continuation) \ 5313 f(jdk_internal_vm_StackChunk) \ 5314 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \ 5315 f(jdk_internal_foreign_abi_NativeEntryPoint) \ 5316 f(jdk_internal_foreign_abi_ABIDescriptor) \ 5317 f(jdk_internal_foreign_abi_VMStorage) \ 5318 f(jdk_internal_foreign_abi_CallConv) \ 5319 f(jdk_internal_misc_UnsafeConstants) \ 5320 f(java_lang_boxing_object) \ 5321 f(vector_VectorPayload) \ 5322 //end 5323 5324 #define BASIC_JAVA_CLASSES_DO(f) \ 5325 BASIC_JAVA_CLASSES_DO_PART1(f) \ 5326 BASIC_JAVA_CLASSES_DO_PART2(f) 5327 5328 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets(); 5329 5330 // Compute field offsets of all the classes in this file 5331 void JavaClasses::compute_offsets() { 5332 if (UseSharedSpaces) { 5333 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() && 5334 JvmtiExport::has_early_class_hook_env()), 5335 "JavaClasses::compute_offsets() must be called in early JVMTI phase.")); 5336 // None of the classes used by the rest of this function can be replaced by 5337 // JVMTI ClassFileLoadHook. 5338 // We are safe to use the archived offsets, which have already been restored 5339 // by JavaClasses::serialize_offsets, without computing the offsets again. 5340 return; 5341 } 5342 5343 // We have already called the compute_offsets() of the 5344 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and 5345 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all() 5346 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS); 5347 } 5348 5349 #if INCLUDE_CDS 5350 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc); 5351 5352 void JavaClasses::serialize_offsets(SerializeClosure* soc) { 5353 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS); 5354 } 5355 #endif 5356 5357 #if INCLUDE_CDS_JAVA_HEAP 5358 bool JavaClasses::is_supported_for_archiving(oop obj) { 5359 Klass* klass = obj->klass(); 5360 5361 if (klass == vmClasses::ClassLoader_klass() || // ClassLoader::loader_data is malloc'ed. 5362 // The next 3 classes are used to implement java.lang.invoke, and are not used directly in 5363 // regular Java code. The implementation of java.lang.invoke uses generated hidden classes 5364 // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS. 5365 // So for now we cannot not support these classes for archiving. 5366 // 5367 // These objects typically are not referenced by static fields, but rather by resolved 5368 // constant pool entries, so excluding them shouldn't affect the archiving of static fields. 5369 klass == vmClasses::ResolvedMethodName_klass() || 5370 klass == vmClasses::MemberName_klass() || 5371 klass == vmClasses::Context_klass() || 5372 // It's problematic to archive Reference objects. One of the reasons is that 5373 // Reference::discovered may pull in unwanted objects (see JDK-8284336) 5374 klass->is_subclass_of(vmClasses::Reference_klass())) { 5375 return false; 5376 } 5377 5378 return true; 5379 } 5380 #endif 5381 5382 #ifndef PRODUCT 5383 5384 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check. 5385 5386 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name, 5387 const char* field_sig) { 5388 EXCEPTION_MARK; 5389 fieldDescriptor fd; 5390 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name); 5391 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 5392 InstanceKlass* ik = InstanceKlass::cast(k); 5393 TempNewSymbol f_name = SymbolTable::new_symbol(field_name); 5394 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig); 5395 if (!ik->find_local_field(f_name, f_sig, &fd)) { 5396 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 5397 return false; 5398 } 5399 if (fd.is_static()) { 5400 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 5401 return false; 5402 } 5403 if (fd.offset() == deserialized_offset ) { 5404 return true; 5405 } else { 5406 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.", 5407 klass_name, field_name, deserialized_offset, fd.offset()); 5408 return false; 5409 } 5410 } 5411 5412 void JavaClasses::check_offsets() { 5413 bool valid = true; 5414 5415 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 5416 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig) 5417 5418 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 5419 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig) 5420 5421 // Boxed primitive objects (java_lang_boxing_object) 5422 5423 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 5424 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 5425 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 5426 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 5427 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 5428 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 5429 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 5430 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 5431 5432 if (!valid) vm_exit_during_initialization("Field offset verification failed"); 5433 } 5434 5435 #endif // PRODUCT 5436 5437 int InjectedField::compute_offset() { 5438 InstanceKlass* ik = InstanceKlass::cast(klass()); 5439 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 5440 if (!may_be_java && !fs.field_flags().is_injected()) { 5441 // Only look at injected fields 5442 continue; 5443 } 5444 if (fs.name() == name() && fs.signature() == signature()) { 5445 return fs.offset(); 5446 } 5447 } 5448 ResourceMark rm; 5449 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)" : ""); 5450 #ifndef PRODUCT 5451 ik->print(); 5452 tty->print_cr("all fields:"); 5453 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 5454 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 5455 } 5456 #endif //PRODUCT 5457 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 5458 return -1; 5459 } 5460 5461 void javaClasses_init() { 5462 JavaClasses::compute_offsets(); 5463 JavaClasses::check_offsets(); 5464 FilteredFieldsMap::initialize(); // must be done after computing offsets. 5465 }