1 /* 2 * Copyright (c) 1997, 2023, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "cds/archiveBuilder.hpp" 27 #include "cds/archiveHeapLoader.hpp" 28 #include "cds/heapShared.hpp" 29 #include "cds/metaspaceShared.hpp" 30 #include "classfile/altHashing.hpp" 31 #include "classfile/classLoaderData.inline.hpp" 32 #include "classfile/javaClasses.inline.hpp" 33 #include "classfile/javaClassesImpl.hpp" 34 #include "classfile/javaThreadStatus.hpp" 35 #include "classfile/moduleEntry.hpp" 36 #include "classfile/stringTable.hpp" 37 #include "classfile/symbolTable.hpp" 38 #include "classfile/systemDictionary.hpp" 39 #include "classfile/vmClasses.hpp" 40 #include "classfile/vmSymbols.hpp" 41 #include "code/debugInfo.hpp" 42 #include "code/dependencyContext.hpp" 43 #include "code/pcDesc.hpp" 44 #include "gc/shared/collectedHeap.inline.hpp" 45 #include "interpreter/interpreter.hpp" 46 #include "interpreter/linkResolver.hpp" 47 #include "jvm.h" 48 #include "logging/log.hpp" 49 #include "logging/logStream.hpp" 50 #include "memory/oopFactory.hpp" 51 #include "memory/resourceArea.hpp" 52 #include "memory/universe.hpp" 53 #include "oops/fieldInfo.hpp" 54 #include "oops/fieldStreams.inline.hpp" 55 #include "oops/instanceKlass.inline.hpp" 56 #include "oops/instanceMirrorKlass.hpp" 57 #include "oops/klass.hpp" 58 #include "oops/klass.inline.hpp" 59 #include "oops/method.inline.hpp" 60 #include "oops/objArrayKlass.hpp" 61 #include "oops/objArrayOop.inline.hpp" 62 #include "oops/oopCast.inline.hpp" 63 #include "oops/oop.inline.hpp" 64 #include "oops/symbol.hpp" 65 #include "oops/recordComponent.hpp" 66 #include "oops/typeArrayOop.inline.hpp" 67 #include "prims/jvmtiExport.hpp" 68 #include "prims/methodHandles.hpp" 69 #include "prims/resolvedMethodTable.hpp" 70 #include "runtime/continuationEntry.inline.hpp" 71 #include "runtime/continuationJavaClasses.inline.hpp" 72 #include "runtime/fieldDescriptor.inline.hpp" 73 #include "runtime/frame.inline.hpp" 74 #include "runtime/handles.inline.hpp" 75 #include "runtime/handshake.hpp" 76 #include "runtime/init.hpp" 77 #include "runtime/interfaceSupport.inline.hpp" 78 #include "runtime/java.hpp" 79 #include "runtime/javaCalls.hpp" 80 #include "runtime/javaThread.hpp" 81 #include "runtime/jniHandles.inline.hpp" 82 #include "runtime/reflectionUtils.hpp" 83 #include "runtime/safepoint.hpp" 84 #include "runtime/safepointVerifiers.hpp" 85 #include "runtime/threadSMR.hpp" 86 #include "runtime/vframe.inline.hpp" 87 #include "runtime/vm_version.hpp" 88 #include "utilities/align.hpp" 89 #include "utilities/growableArray.hpp" 90 #include "utilities/preserveException.hpp" 91 #include "utilities/utf8.hpp" 92 #if INCLUDE_JVMCI 93 #include "jvmci/jvmciJavaClasses.hpp" 94 #endif 95 96 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 97 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 98 99 InjectedField JavaClasses::_injected_fields[] = { 100 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 101 }; 102 103 // Register native methods of Object 104 void java_lang_Object::register_natives(TRAPS) { 105 InstanceKlass* obj = vmClasses::Object_klass(); 106 Method::register_native(obj, vmSymbols::hashCode_name(), 107 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK); 108 Method::register_native(obj, vmSymbols::wait_name(), 109 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK); 110 Method::register_native(obj, vmSymbols::notify_name(), 111 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK); 112 Method::register_native(obj, vmSymbols::notifyAll_name(), 113 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK); 114 Method::register_native(obj, vmSymbols::clone_name(), 115 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD); 116 } 117 118 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 119 return _injected_fields[(int)id].compute_offset(); 120 } 121 122 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 123 *field_count = 0; 124 125 vmSymbolID sid = vmSymbols::find_sid(class_name); 126 if (sid == vmSymbolID::NO_SID) { 127 // Only well known classes can inject fields 128 return nullptr; 129 } 130 131 int count = 0; 132 int start = -1; 133 134 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 135 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \ 136 count++; \ 137 if (start == -1) { \ 138 start = (int)InjectedFieldID::klass##_##name##_enum; \ 139 } \ 140 } 141 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 142 #undef LOOKUP_INJECTED_FIELD 143 144 if (start != -1) { 145 *field_count = count; 146 return _injected_fields + start; 147 } 148 return nullptr; 149 } 150 151 152 // Helpful routine for computing field offsets at run time rather than hardcoding them 153 // Finds local fields only, including static fields. Static field offsets are from the 154 // beginning of the mirror. 155 void JavaClasses::compute_offset(int &dest_offset, 156 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol, 157 bool is_static) { 158 fieldDescriptor fd; 159 if (ik == nullptr) { 160 ResourceMark rm; 161 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string()); 162 vm_exit_during_initialization("Invalid layout of well-known class"); 163 } 164 165 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) { 166 ResourceMark rm; 167 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(), 168 name_symbol->as_C_string(), signature_symbol->as_C_string()); 169 #ifndef PRODUCT 170 // Prints all fields and offsets 171 Log(class) lt; 172 LogStream ls(lt.error()); 173 ik->print_on(&ls); 174 #endif //PRODUCT 175 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 176 } 177 dest_offset = fd.offset(); 178 } 179 180 // Overloading to pass name as a string. 181 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik, 182 const char* name_string, Symbol* signature_symbol, 183 bool is_static) { 184 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string)); 185 if (name == nullptr) { 186 ResourceMark rm; 187 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string); 188 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name()); 189 } 190 compute_offset(dest_offset, ik, name, signature_symbol, is_static); 191 } 192 193 // java_lang_String 194 195 int java_lang_String::_value_offset; 196 int java_lang_String::_hash_offset; 197 int java_lang_String::_hashIsZero_offset; 198 int java_lang_String::_coder_offset; 199 int java_lang_String::_flags_offset; 200 201 bool java_lang_String::_initialized; 202 203 204 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) { 205 uint8_t* addr = flags_addr(java_string); 206 uint8_t value = Atomic::load(addr); 207 while ((value & flag_mask) == 0) { 208 uint8_t old_value = value; 209 value |= flag_mask; 210 value = Atomic::cmpxchg(addr, old_value, value); 211 if (value == old_value) return false; // Flag bit changed from 0 to 1. 212 } 213 return true; // Flag bit is already 1. 214 } 215 216 #define STRING_FIELDS_DO(macro) \ 217 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \ 218 macro(_hash_offset, k, "hash", int_signature, false); \ 219 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \ 220 macro(_coder_offset, k, "coder", byte_signature, false); 221 222 void java_lang_String::compute_offsets() { 223 if (_initialized) { 224 return; 225 } 226 227 InstanceKlass* k = vmClasses::String_klass(); 228 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 229 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 230 231 _initialized = true; 232 } 233 234 #if INCLUDE_CDS 235 void java_lang_String::serialize_offsets(SerializeClosure* f) { 236 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 237 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 238 f->do_bool(&_initialized); 239 } 240 #endif 241 242 class CompactStringsFixup : public FieldClosure { 243 private: 244 bool _value; 245 246 public: 247 CompactStringsFixup(bool value) : _value(value) {} 248 249 void do_field(fieldDescriptor* fd) { 250 if (fd->name() == vmSymbols::compact_strings_name()) { 251 oop mirror = fd->field_holder()->java_mirror(); 252 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String"); 253 assert(mirror != nullptr, "String must have mirror already"); 254 mirror->bool_field_put(fd->offset(), _value); 255 } 256 } 257 }; 258 259 void java_lang_String::set_compact_strings(bool value) { 260 CompactStringsFixup fix(value); 261 vmClasses::String_klass()->do_local_static_fields(&fix); 262 } 263 264 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 265 assert(_initialized, "Must be initialized"); 266 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 267 268 // Create the String object first, so there's a chance that the String 269 // and the char array it points to end up in the same cache line. 270 oop obj; 271 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH); 272 273 // Create the char array. The String object must be handlized here 274 // because GC can happen as a result of the allocation attempt. 275 Handle h_obj(THREAD, obj); 276 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 277 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 278 279 // Point the String at the char array 280 obj = h_obj(); 281 set_value(obj, buffer); 282 // No need to zero the offset, allocation zero'ed the entire String object 283 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 284 return h_obj; 285 } 286 287 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) { 288 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 289 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 290 typeArrayOop buffer = value(h_obj()); 291 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 292 if (is_latin1) { 293 for (int index = 0; index < length; index++) { 294 buffer->byte_at_put(index, (jbyte)unicode[index]); 295 } 296 } else { 297 for (int index = 0; index < length; index++) { 298 buffer->char_at_put(index, unicode[index]); 299 } 300 } 301 302 #ifdef ASSERT 303 { 304 ResourceMark rm; 305 char* expected = UNICODE::as_utf8(unicode, length); 306 char* actual = as_utf8_string(h_obj()); 307 if (strcmp(expected, actual) != 0) { 308 fatal("Unicode conversion failure: %s --> %s", expected, actual); 309 } 310 } 311 #endif 312 313 return h_obj; 314 } 315 316 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) { 317 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL); 318 return h_obj(); 319 } 320 321 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 322 if (utf8_str == nullptr) { 323 return Handle(); 324 } 325 bool has_multibyte, is_latin1; 326 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 327 if (!CompactStrings) { 328 has_multibyte = true; 329 is_latin1 = false; 330 } 331 332 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 333 if (length > 0) { 334 if (!has_multibyte) { 335 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 336 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 337 } else if (is_latin1) { 338 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 339 } else { 340 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 341 } 342 } 343 344 #ifdef ASSERT 345 // This check is too strict when the input string is not a valid UTF8. 346 // For example, it may be created with arbitrary content via jni_NewStringUTF. 347 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, (int)strlen(utf8_str), false)) { 348 ResourceMark rm; 349 const char* expected = utf8_str; 350 char* actual = as_utf8_string(h_obj()); 351 if (strcmp(expected, actual) != 0) { 352 fatal("String conversion failure: %s --> %s", expected, actual); 353 } 354 } 355 #endif 356 357 return h_obj; 358 } 359 360 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 361 Handle h_obj = create_from_str(utf8_str, CHECK_NULL); 362 return h_obj(); 363 } 364 365 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 366 const char* utf8_str = (char*)symbol->bytes(); 367 int utf8_len = symbol->utf8_length(); 368 369 bool has_multibyte, is_latin1; 370 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 371 if (!CompactStrings) { 372 has_multibyte = true; 373 is_latin1 = false; 374 } 375 376 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 377 if (length > 0) { 378 if (!has_multibyte) { 379 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 380 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 381 } else if (is_latin1) { 382 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 383 } else { 384 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 385 } 386 } 387 388 #ifdef ASSERT 389 { 390 ResourceMark rm; 391 const char* expected = symbol->as_utf8(); 392 char* actual = as_utf8_string(h_obj()); 393 if (strncmp(expected, actual, utf8_len) != 0) { 394 fatal("Symbol conversion failure: %s --> %s", expected, actual); 395 } 396 } 397 #endif 398 399 return h_obj; 400 } 401 402 // Converts a C string to a Java String based on current encoding 403 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 404 assert(str != nullptr, "bad arguments"); 405 406 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *); 407 static to_java_string_fn_t _to_java_string_fn = nullptr; 408 409 if (_to_java_string_fn == nullptr) { 410 void *lib_handle = os::native_java_library(); 411 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform")); 412 #if defined(_WIN32) && !defined(_WIN64) 413 if (_to_java_string_fn == nullptr) { 414 // On 32 bit Windows, also try __stdcall decorated name 415 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8")); 416 } 417 #endif 418 if (_to_java_string_fn == nullptr) { 419 fatal("JNU_NewStringPlatform missing"); 420 } 421 } 422 423 jstring js = nullptr; 424 { 425 JavaThread* thread = THREAD; 426 HandleMark hm(thread); 427 ThreadToNativeFromVM ttn(thread); 428 js = (_to_java_string_fn)(thread->jni_environment(), str); 429 } 430 431 Handle native_platform_string(THREAD, JNIHandles::resolve(js)); 432 JNIHandles::destroy_local(js); // destroy local JNIHandle. 433 return native_platform_string; 434 } 435 436 // Converts a Java String to a native C string that can be used for 437 // native OS calls. 438 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 439 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 440 static to_platform_string_fn_t _to_platform_string_fn = nullptr; 441 442 if (_to_platform_string_fn == nullptr) { 443 void *lib_handle = os::native_java_library(); 444 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 445 if (_to_platform_string_fn == nullptr) { 446 fatal("GetStringPlatformChars missing"); 447 } 448 } 449 450 char *native_platform_string; 451 jstring js; 452 { JavaThread* thread = THREAD; 453 js = (jstring) JNIHandles::make_local(thread, java_string()); 454 HandleMark hm(thread); 455 ThreadToNativeFromVM ttn(thread); 456 JNIEnv *env = thread->jni_environment(); 457 bool is_copy; 458 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 459 assert(is_copy == JNI_TRUE, "is_copy value changed"); 460 } 461 462 // Uses a store barrier and therefore needs to be in vm state 463 JNIHandles::destroy_local(js); 464 465 return native_platform_string; 466 } 467 468 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) { 469 ResourceMark rm(THREAD); 470 return create_from_str(java_name->as_klass_external_name(), THREAD); 471 } 472 473 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 474 jchar* result = as_unicode_string_or_null(java_string, length); 475 if (result == nullptr) { 476 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 477 } 478 return result; 479 } 480 481 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) { 482 typeArrayOop value = java_lang_String::value(java_string); 483 length = java_lang_String::length(java_string, value); 484 bool is_latin1 = java_lang_String::is_latin1(java_string); 485 486 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 487 if (result != nullptr) { 488 if (!is_latin1) { 489 for (int index = 0; index < length; index++) { 490 result[index] = value->char_at(index); 491 } 492 } else { 493 for (int index = 0; index < length; index++) { 494 result[index] = ((jchar) value->byte_at(index)) & 0xff; 495 } 496 } 497 } 498 return result; 499 } 500 501 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) { 502 // The hash and hashIsZero fields are subject to a benign data race, 503 // making it crucial to ensure that any observable result of the 504 // calculation in this method stays correct under any possible read of 505 // these fields. Necessary restrictions to allow this to be correct 506 // without explicit memory fences or similar concurrency primitives is 507 // that we can ever only write to one of these two fields for a given 508 // String instance, and that the computation is idempotent and derived 509 // from immutable state 510 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized"); 511 if (java_lang_String::hash_is_set(java_string)) { 512 return java_string->int_field(_hash_offset); 513 } 514 515 typeArrayOop value = java_lang_String::value(java_string); 516 int length = java_lang_String::length(java_string, value); 517 bool is_latin1 = java_lang_String::is_latin1(java_string); 518 519 unsigned int hash = 0; 520 if (length > 0) { 521 if (is_latin1) { 522 hash = java_lang_String::hash_code(value->byte_at_addr(0), length); 523 } else { 524 hash = java_lang_String::hash_code(value->char_at_addr(0), length); 525 } 526 } 527 528 if (update) { 529 if (hash != 0) { 530 java_string->int_field_put(_hash_offset, hash); 531 } else { 532 java_string->bool_field_put(_hashIsZero_offset, true); 533 } 534 } 535 return hash; 536 } 537 538 unsigned int java_lang_String::hash_code(oop java_string) { 539 return hash_code_impl(java_string, /*update=*/true); 540 } 541 542 unsigned int java_lang_String::hash_code_noupdate(oop java_string) { 543 return hash_code_impl(java_string, /*update=*/false); 544 } 545 546 547 char* java_lang_String::as_quoted_ascii(oop java_string) { 548 typeArrayOop value = java_lang_String::value(java_string); 549 int length = java_lang_String::length(java_string, value); 550 bool is_latin1 = java_lang_String::is_latin1(java_string); 551 552 if (length == 0) return nullptr; 553 554 char* result; 555 int result_length; 556 if (!is_latin1) { 557 jchar* base = value->char_at_addr(0); 558 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 559 result = NEW_RESOURCE_ARRAY(char, result_length); 560 UNICODE::as_quoted_ascii(base, length, result, result_length); 561 } else { 562 jbyte* base = value->byte_at_addr(0); 563 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 564 result = NEW_RESOURCE_ARRAY(char, result_length); 565 UNICODE::as_quoted_ascii(base, length, result, result_length); 566 } 567 assert(result_length >= length + 1, "must not be shorter"); 568 assert(result_length == (int)strlen(result) + 1, "must match"); 569 return result; 570 } 571 572 Symbol* java_lang_String::as_symbol(oop java_string) { 573 typeArrayOop value = java_lang_String::value(java_string); 574 int length = java_lang_String::length(java_string, value); 575 bool is_latin1 = java_lang_String::is_latin1(java_string); 576 if (!is_latin1) { 577 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0); 578 Symbol* sym = SymbolTable::new_symbol(base, length); 579 return sym; 580 } else { 581 ResourceMark rm; 582 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 583 const char* base = UNICODE::as_utf8(position, length); 584 Symbol* sym = SymbolTable::new_symbol(base, length); 585 return sym; 586 } 587 } 588 589 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 590 typeArrayOop value = java_lang_String::value(java_string); 591 int length = java_lang_String::length(java_string, value); 592 bool is_latin1 = java_lang_String::is_latin1(java_string); 593 if (!is_latin1) { 594 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0); 595 return SymbolTable::probe_unicode(base, length); 596 } else { 597 ResourceMark rm; 598 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 599 const char* base = UNICODE::as_utf8(position, length); 600 return SymbolTable::probe(base, length); 601 } 602 } 603 604 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) { 605 assert(value_equals(value, java_lang_String::value(java_string)), 606 "value must be same as java_lang_String::value(java_string)"); 607 int length = java_lang_String::length(java_string, value); 608 if (length == 0) { 609 return 0; 610 } 611 if (!java_lang_String::is_latin1(java_string)) { 612 return UNICODE::utf8_length(value->char_at_addr(0), length); 613 } else { 614 return UNICODE::utf8_length(value->byte_at_addr(0), length); 615 } 616 } 617 618 int java_lang_String::utf8_length(oop java_string) { 619 typeArrayOop value = java_lang_String::value(java_string); 620 return utf8_length(java_string, value); 621 } 622 623 char* java_lang_String::as_utf8_string(oop java_string) { 624 int length; 625 return as_utf8_string(java_string, length); 626 } 627 628 char* java_lang_String::as_utf8_string(oop java_string, int& length) { 629 typeArrayOop value = java_lang_String::value(java_string); 630 length = java_lang_String::length(java_string, value); 631 bool is_latin1 = java_lang_String::is_latin1(java_string); 632 if (!is_latin1) { 633 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0); 634 return UNICODE::as_utf8(position, length); 635 } else { 636 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 637 return UNICODE::as_utf8(position, length); 638 } 639 } 640 641 // Uses a provided buffer if it's sufficiently large, otherwise allocates 642 // a resource array to fit 643 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, int buflen, int& utf8_len) { 644 typeArrayOop value = java_lang_String::value(java_string); 645 int len = java_lang_String::length(java_string, value); 646 bool is_latin1 = java_lang_String::is_latin1(java_string); 647 if (!is_latin1) { 648 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0); 649 utf8_len = UNICODE::utf8_length(position, len); 650 if (utf8_len >= buflen) { 651 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 652 } 653 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 654 } else { 655 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0); 656 utf8_len = UNICODE::utf8_length(position, len); 657 if (utf8_len >= buflen) { 658 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 659 } 660 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 661 } 662 } 663 664 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) { 665 assert(value_equals(value, java_lang_String::value(java_string)), 666 "value must be same as java_lang_String::value(java_string)"); 667 int length = java_lang_String::length(java_string, value); 668 bool is_latin1 = java_lang_String::is_latin1(java_string); 669 if (!is_latin1) { 670 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0); 671 return UNICODE::as_utf8(position, length, buf, buflen); 672 } else { 673 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 674 return UNICODE::as_utf8(position, length, buf, buflen); 675 } 676 } 677 678 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 679 typeArrayOop value = java_lang_String::value(java_string); 680 return as_utf8_string(java_string, value, buf, buflen); 681 } 682 683 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 684 typeArrayOop value = java_lang_String::value(java_string); 685 bool is_latin1 = java_lang_String::is_latin1(java_string); 686 assert(start + len <= java_lang_String::length(java_string), "just checking"); 687 if (!is_latin1) { 688 jchar* position = value->char_at_addr(start); 689 return UNICODE::as_utf8(position, len); 690 } else { 691 jbyte* position = value->byte_at_addr(start); 692 return UNICODE::as_utf8(position, len); 693 } 694 } 695 696 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) { 697 assert(value_equals(value, java_lang_String::value(java_string)), 698 "value must be same as java_lang_String::value(java_string)"); 699 assert(start + len <= java_lang_String::length(java_string), "just checking"); 700 bool is_latin1 = java_lang_String::is_latin1(java_string); 701 if (!is_latin1) { 702 jchar* position = value->char_at_addr(start); 703 return UNICODE::as_utf8(position, len, buf, buflen); 704 } else { 705 jbyte* position = value->byte_at_addr(start); 706 return UNICODE::as_utf8(position, len, buf, buflen); 707 } 708 } 709 710 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) { 711 assert(java_string->klass() == vmClasses::String_klass(), 712 "must be java_string"); 713 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 714 int length = java_lang_String::length(java_string, value); 715 if (length != len) { 716 return false; 717 } 718 bool is_latin1 = java_lang_String::is_latin1(java_string); 719 if (!is_latin1) { 720 for (int i = 0; i < len; i++) { 721 if (value->char_at(i) != chars[i]) { 722 return false; 723 } 724 } 725 } else { 726 for (int i = 0; i < len; i++) { 727 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 728 return false; 729 } 730 } 731 } 732 return true; 733 } 734 735 bool java_lang_String::equals(oop str1, oop str2) { 736 assert(str1->klass() == vmClasses::String_klass(), 737 "must be java String"); 738 assert(str2->klass() == vmClasses::String_klass(), 739 "must be java String"); 740 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1); 741 bool is_latin1 = java_lang_String::is_latin1(str1); 742 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2); 743 bool is_latin2 = java_lang_String::is_latin1(str2); 744 745 if (is_latin1 != is_latin2) { 746 // Strings with different coders are never equal. 747 return false; 748 } 749 return value_equals(value1, value2); 750 } 751 752 void java_lang_String::print(oop java_string, outputStream* st) { 753 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string"); 754 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 755 756 if (value == nullptr) { 757 // This can happen if, e.g., printing a String 758 // object before its initializer has been called 759 st->print("nullptr"); 760 return; 761 } 762 763 int length = java_lang_String::length(java_string, value); 764 bool is_latin1 = java_lang_String::is_latin1(java_string); 765 766 st->print("\""); 767 for (int index = 0; index < length; index++) { 768 st->print("%c", (!is_latin1) ? value->char_at(index) : 769 ((jchar) value->byte_at(index)) & 0xff ); 770 } 771 st->print("\""); 772 } 773 774 // java_lang_Class 775 776 int java_lang_Class::_klass_offset; 777 int java_lang_Class::_array_klass_offset; 778 int java_lang_Class::_oop_size_offset; 779 int java_lang_Class::_static_oop_field_count_offset; 780 int java_lang_Class::_class_loader_offset; 781 int java_lang_Class::_module_offset; 782 int java_lang_Class::_protection_domain_offset; 783 int java_lang_Class::_component_mirror_offset; 784 int java_lang_Class::_signers_offset; 785 int java_lang_Class::_name_offset; 786 int java_lang_Class::_source_file_offset; 787 int java_lang_Class::_classData_offset; 788 int java_lang_Class::_classRedefinedCount_offset; 789 790 bool java_lang_Class::_offsets_computed = false; 791 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr; 792 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr; 793 794 #ifdef ASSERT 795 inline static void assert_valid_static_string_field(fieldDescriptor* fd) { 796 assert(fd->has_initial_value(), "caller should have checked this"); 797 assert(fd->field_type() == T_OBJECT, "caller should have checked this"); 798 // Can't use vmSymbols::string_signature() as fd->signature() may have been relocated 799 // during DumpSharedSpaces 800 assert(fd->signature()->equals("Ljava/lang/String;"), "just checking"); 801 } 802 #endif 803 804 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 805 DEBUG_ONLY(assert_valid_static_string_field(fd);) 806 oop string = fd->string_initial_value(CHECK); 807 mirror()->obj_field_put(fd->offset(), string); 808 } 809 810 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) { 811 assert(fd->has_initial_value(), "caller should have checked this"); 812 BasicType t = fd->field_type(); 813 switch (t) { 814 case T_BYTE: 815 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 816 break; 817 case T_BOOLEAN: 818 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 819 break; 820 case T_CHAR: 821 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 822 break; 823 case T_SHORT: 824 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 825 break; 826 case T_INT: 827 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 828 break; 829 case T_FLOAT: 830 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 831 break; 832 case T_DOUBLE: 833 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 834 break; 835 case T_LONG: 836 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 837 break; 838 default: 839 // Illegal ConstantValue attribute in class file should have been 840 // caught during classfile parsing. 841 ShouldNotReachHere(); 842 } 843 } 844 845 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 846 assert(mirror.not_null() && fd->is_static(), "just checking"); 847 if (fd->has_initial_value()) { 848 if (fd->field_type() != T_OBJECT) { 849 initialize_static_primitive_field(fd, mirror); 850 } else { 851 initialize_static_string_field(fd, mirror, CHECK); 852 } 853 } 854 } 855 856 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 857 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 858 859 // If the offset was read from the shared archive, it was fixed up already 860 if (!k->is_shared()) { 861 if (k->is_instance_klass()) { 862 // During bootstrap, java.lang.Class wasn't loaded so static field 863 // offsets were computed without the size added it. Go back and 864 // update all the static field offsets to included the size. 865 866 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow 867 // content updates. So the FieldInfo stream has to be decompressed into a temporary array, 868 // static fields offsets are updated in this array before reencoding everything into 869 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream. 870 871 int java_fields; 872 int injected_fields; 873 InstanceKlass* ik = InstanceKlass::cast(k); 874 GrowableArray<FieldInfo>* fields = 875 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(), 876 &java_fields, &injected_fields); 877 for (int i = 0; i < fields->length(); i++) { 878 FieldInfo* fi = fields->adr_at(i); 879 if (fi->access_flags().is_static()) { 880 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields()); 881 } 882 } 883 Array<u1>* old_stream = ik->fieldinfo_stream(); 884 assert(fields->length() == (java_fields + injected_fields), "Must be"); 885 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK); 886 ik->set_fieldinfo_stream(new_fis); 887 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream); 888 } 889 } 890 891 if (k->is_shared() && k->has_archived_mirror_index()) { 892 if (ArchiveHeapLoader::are_archived_mirrors_available()) { 893 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK); 894 assert(present, "Missing archived mirror for %s", k->external_name()); 895 return; 896 } else { 897 k->clear_java_mirror_handle(); 898 k->clear_archived_mirror_index(); 899 } 900 } 901 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK); 902 } 903 904 void java_lang_Class::initialize_mirror_fields(Klass* k, 905 Handle mirror, 906 Handle protection_domain, 907 Handle classData, 908 TRAPS) { 909 // Set protection domain also 910 set_protection_domain(mirror(), protection_domain()); 911 912 // Initialize static fields 913 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 914 915 // Set classData 916 set_class_data(mirror(), classData()); 917 } 918 919 // Set the java.lang.Module module field in the java_lang_Class mirror 920 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) { 921 if (module.is_null()) { 922 // During startup, the module may be null only if java.base has not been defined yet. 923 // Put the class on the fixup_module_list to patch later when the java.lang.Module 924 // for java.base is known. But note that since we captured the null module another 925 // thread may have completed that initialization. 926 927 bool javabase_was_defined = false; 928 { 929 MutexLocker m1(current, Module_lock); 930 // Keep list of classes needing java.base module fixup 931 if (!ModuleEntryTable::javabase_defined()) { 932 assert(k->java_mirror() != nullptr, "Class's mirror is null"); 933 k->class_loader_data()->inc_keep_alive(); 934 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized"); 935 fixup_module_field_list()->push(k); 936 } else { 937 javabase_was_defined = true; 938 } 939 } 940 941 // If java.base was already defined then patch this particular class with java.base. 942 if (javabase_was_defined) { 943 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 944 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr, 945 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 946 Handle javabase_handle(current, javabase_entry->module()); 947 set_module(mirror(), javabase_handle()); 948 } 949 } else { 950 assert(Universe::is_module_initialized() || 951 (ModuleEntryTable::javabase_defined() && 952 (module() == ModuleEntryTable::javabase_moduleEntry()->module())), 953 "Incorrect java.lang.Module specification while creating mirror"); 954 set_module(mirror(), module()); 955 } 956 } 957 958 // Statically allocate fixup lists because they always get created. 959 void java_lang_Class::allocate_fixup_lists() { 960 GrowableArray<Klass*>* mirror_list = 961 new (mtClass) GrowableArray<Klass*>(40, mtClass); 962 set_fixup_mirror_list(mirror_list); 963 964 GrowableArray<Klass*>* module_list = 965 new (mtModule) GrowableArray<Klass*>(500, mtModule); 966 set_fixup_module_field_list(module_list); 967 } 968 969 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData, 970 Handle& mirror, Handle& comp_mirror, TRAPS) { 971 // Allocate mirror (java.lang.Class instance) 972 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK); 973 mirror = Handle(THREAD, mirror_oop); 974 975 // Setup indirection from mirror->klass 976 set_klass(mirror(), k); 977 978 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 979 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 980 981 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 982 983 // It might also have a component mirror. This mirror must already exist. 984 if (k->is_array_klass()) { 985 if (k->is_typeArray_klass()) { 986 BasicType type = TypeArrayKlass::cast(k)->element_type(); 987 if (is_scratch) { 988 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type)); 989 } else { 990 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 991 } 992 } else { 993 assert(k->is_objArray_klass(), "Must be"); 994 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 995 assert(element_klass != nullptr, "Must have an element klass"); 996 if (is_scratch) { 997 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass)); 998 } else { 999 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 1000 } 1001 } 1002 assert(comp_mirror() != nullptr, "must have a mirror"); 1003 1004 // Two-way link between the array klass and its component mirror: 1005 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 1006 set_component_mirror(mirror(), comp_mirror()); 1007 // See below for ordering dependencies between field array_klass in component mirror 1008 // and java_mirror in this klass. 1009 } else { 1010 assert(k->is_instance_klass(), "Must be"); 1011 1012 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD); 1013 if (HAS_PENDING_EXCEPTION) { 1014 // If any of the fields throws an exception like OOM remove the klass field 1015 // from the mirror so GC doesn't follow it after the klass has been deallocated. 1016 // This mirror looks like a primitive type, which logically it is because it 1017 // it represents no class. 1018 set_klass(mirror(), nullptr); 1019 return; 1020 } 1021 } 1022 } 1023 1024 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 1025 Handle module, Handle protection_domain, 1026 Handle classData, TRAPS) { 1027 assert(k != nullptr, "Use create_basic_type_mirror for primitive types"); 1028 assert(k->java_mirror() == nullptr, "should only assign mirror once"); 1029 1030 // Use this moment of initialization to cache modifier_flags also, 1031 // to support Class.getModifiers(). Instance classes recalculate 1032 // the cached flags after the class file is parsed, but before the 1033 // class is put into the system dictionary. 1034 int computed_modifiers = k->compute_modifier_flags(); 1035 k->set_modifier_flags(computed_modifiers); 1036 // Class_klass has to be loaded because it is used to allocate 1037 // the mirror. 1038 if (vmClasses::Class_klass_loaded()) { 1039 Handle mirror; 1040 Handle comp_mirror; 1041 1042 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK); 1043 1044 // set the classLoader field in the java_lang_Class instance 1045 assert(class_loader() == k->class_loader(), "should be same"); 1046 set_class_loader(mirror(), class_loader()); 1047 1048 // Setup indirection from klass->mirror 1049 // after any exceptions can happen during allocations. 1050 k->set_java_mirror(mirror); 1051 1052 // Set the module field in the java_lang_Class instance. This must be done 1053 // after the mirror is set. 1054 set_mirror_module_field(THREAD, k, mirror, module); 1055 1056 if (comp_mirror() != nullptr) { 1057 // Set after k->java_mirror() is published, because compiled code running 1058 // concurrently doesn't expect a k to have a null java_mirror. 1059 release_set_array_klass(comp_mirror(), k); 1060 } 1061 if (DumpSharedSpaces) { 1062 create_scratch_mirror(k, CHECK); 1063 } 1064 } else { 1065 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized"); 1066 fixup_mirror_list()->push(k); 1067 } 1068 } 1069 1070 #if INCLUDE_CDS_JAVA_HEAP 1071 // The "scratch mirror" stores the states of the mirror object that can be 1072 // decided at dump time (such as the initial values of the static fields, the 1073 // component mirror, etc). At runtime, more information is added to it by 1074 // java_lang_Class::restore_archived_mirror(). 1075 // 1076 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror() 1077 // produces the same result as /*runtime*/create_mirror(). 1078 // 1079 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the 1080 // latter may contain dumptime-specific information that cannot be archived 1081 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution). 1082 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) { 1083 if (k->class_loader() != nullptr && 1084 k->class_loader() != SystemDictionary::java_platform_loader() && 1085 k->class_loader() != SystemDictionary::java_system_loader()) { 1086 // We only archive the mirrors of classes loaded by the built-in loaders 1087 return; 1088 } 1089 1090 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime 1091 Handle mirror; 1092 Handle comp_mirror; 1093 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK); 1094 1095 if (comp_mirror() != nullptr) { 1096 release_set_array_klass(comp_mirror(), k); 1097 } 1098 1099 HeapShared::set_scratch_java_mirror(k, mirror()); 1100 } 1101 1102 // Returns true if the mirror is updated, false if no archived mirror 1103 // data is present. After the archived mirror object is restored, the 1104 // shared klass' _has_raw_archived_mirror flag is cleared. 1105 bool java_lang_Class::restore_archived_mirror(Klass *k, 1106 Handle class_loader, Handle module, 1107 Handle protection_domain, TRAPS) { 1108 // Postpone restoring archived mirror until java.lang.Class is loaded. Please 1109 // see more details in vmClasses::resolve_all(). 1110 if (!vmClasses::Class_klass_loaded()) { 1111 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized"); 1112 fixup_mirror_list()->push(k); 1113 return true; 1114 } 1115 1116 oop m = k->archived_java_mirror(); 1117 assert(m != nullptr, "must have stored non-null archived mirror"); 1118 1119 // Sanity: clear it now to prevent re-initialization if any of the following fails 1120 k->clear_archived_mirror_index(); 1121 1122 // mirror is archived, restore 1123 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m)); 1124 if (ArchiveHeapLoader::is_mapped()) { 1125 assert(Universe::heap()->is_archived_object(m), "must be archived mirror object"); 1126 } 1127 assert(as_Klass(m) == k, "must be"); 1128 Handle mirror(THREAD, m); 1129 1130 if (!k->is_array_klass()) { 1131 // - local static final fields with initial values were initialized at dump time 1132 1133 if (protection_domain.not_null()) { 1134 set_protection_domain(mirror(), protection_domain()); 1135 } 1136 } 1137 1138 assert(class_loader() == k->class_loader(), "should be same"); 1139 if (class_loader.not_null()) { 1140 set_class_loader(mirror(), class_loader()); 1141 } 1142 1143 k->set_java_mirror(mirror); 1144 1145 set_mirror_module_field(THREAD, k, mirror, module); 1146 1147 if (log_is_enabled(Trace, cds, heap, mirror)) { 1148 ResourceMark rm(THREAD); 1149 log_trace(cds, heap, mirror)( 1150 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1151 } 1152 1153 return true; 1154 } 1155 #endif // INCLUDE_CDS_JAVA_HEAP 1156 1157 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1158 assert(_module_offset != 0, "must have been computed already"); 1159 set_module(k->java_mirror(), module()); 1160 } 1161 1162 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) { 1163 assert(_oop_size_offset != 0, "must be set"); 1164 assert(size > 0, "Oop size must be greater than zero, not " SIZE_FORMAT, size); 1165 assert(size <= INT_MAX, "Lossy conversion: " SIZE_FORMAT, size); 1166 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size; 1167 } 1168 1169 int java_lang_Class::static_oop_field_count(oop java_class) { 1170 assert(_static_oop_field_count_offset != 0, "must be set"); 1171 return java_class->int_field(_static_oop_field_count_offset); 1172 } 1173 1174 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1175 assert(_static_oop_field_count_offset != 0, "must be set"); 1176 java_class->int_field_put(_static_oop_field_count_offset, size); 1177 } 1178 1179 oop java_lang_Class::protection_domain(oop java_class) { 1180 assert(_protection_domain_offset != 0, "must be set"); 1181 return java_class->obj_field(_protection_domain_offset); 1182 } 1183 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1184 assert(_protection_domain_offset != 0, "must be set"); 1185 java_class->obj_field_put(_protection_domain_offset, pd); 1186 } 1187 1188 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1189 assert(_component_mirror_offset != 0, "must be set"); 1190 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1191 } 1192 oop java_lang_Class::component_mirror(oop java_class) { 1193 assert(_component_mirror_offset != 0, "must be set"); 1194 return java_class->obj_field(_component_mirror_offset); 1195 } 1196 1197 objArrayOop java_lang_Class::signers(oop java_class) { 1198 assert(_signers_offset != 0, "must be set"); 1199 return (objArrayOop)java_class->obj_field(_signers_offset); 1200 } 1201 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 1202 assert(_signers_offset != 0, "must be set"); 1203 java_class->obj_field_put(_signers_offset, signers); 1204 } 1205 1206 oop java_lang_Class::class_data(oop java_class) { 1207 assert(_classData_offset != 0, "must be set"); 1208 return java_class->obj_field(_classData_offset); 1209 } 1210 void java_lang_Class::set_class_data(oop java_class, oop class_data) { 1211 assert(_classData_offset != 0, "must be set"); 1212 java_class->obj_field_put(_classData_offset, class_data); 1213 } 1214 1215 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1216 assert(_class_loader_offset != 0, "offsets should have been initialized"); 1217 java_class->obj_field_put(_class_loader_offset, loader); 1218 } 1219 1220 oop java_lang_Class::class_loader(oop java_class) { 1221 assert(_class_loader_offset != 0, "must be set"); 1222 return java_class->obj_field(_class_loader_offset); 1223 } 1224 1225 oop java_lang_Class::module(oop java_class) { 1226 assert(_module_offset != 0, "must be set"); 1227 return java_class->obj_field(_module_offset); 1228 } 1229 1230 void java_lang_Class::set_module(oop java_class, oop module) { 1231 assert(_module_offset != 0, "must be set"); 1232 java_class->obj_field_put(_module_offset, module); 1233 } 1234 1235 oop java_lang_Class::name(Handle java_class, TRAPS) { 1236 assert(_name_offset != 0, "must be set"); 1237 oop o = java_class->obj_field(_name_offset); 1238 if (o == nullptr) { 1239 o = StringTable::intern(as_external_name(java_class()), THREAD); 1240 java_class->obj_field_put(_name_offset, o); 1241 } 1242 return o; 1243 } 1244 1245 oop java_lang_Class::source_file(oop java_class) { 1246 assert(_source_file_offset != 0, "must be set"); 1247 return java_class->obj_field(_source_file_offset); 1248 } 1249 1250 void java_lang_Class::set_source_file(oop java_class, oop source_file) { 1251 assert(_source_file_offset != 0, "must be set"); 1252 java_class->obj_field_put(_source_file_offset, source_file); 1253 } 1254 1255 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1256 // This should be improved by adding a field at the Java level or by 1257 // introducing a new VM klass (see comment in ClassFileParser) 1258 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL); 1259 if (type != T_VOID) { 1260 Klass* aklass = Universe::typeArrayKlassObj(type); 1261 assert(aklass != nullptr, "correct bootstrap"); 1262 release_set_array_klass(java_class, aklass); 1263 } 1264 #ifdef ASSERT 1265 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass()); 1266 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1267 #endif 1268 return java_class; 1269 } 1270 1271 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1272 assert(is_instance(java_class), "must be a Class object"); 1273 java_class->metadata_field_put(_klass_offset, klass); 1274 } 1275 1276 1277 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1278 assert(is_instance(java_class), "must be a Class object"); 1279 Symbol* name = nullptr; 1280 bool is_instance = false; 1281 if (is_primitive(java_class)) { 1282 name = vmSymbols::type_signature(primitive_type(java_class)); 1283 } else { 1284 Klass* k = as_Klass(java_class); 1285 is_instance = k->is_instance_klass(); 1286 name = k->name(); 1287 } 1288 if (name == nullptr) { 1289 st->print("<null>"); 1290 return; 1291 } 1292 if (is_instance) st->print("L"); 1293 st->write((char*) name->base(), (int) name->utf8_length()); 1294 if (is_instance) st->print(";"); 1295 } 1296 1297 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) { 1298 assert(is_instance(java_class), "must be a Class object"); 1299 Symbol* name; 1300 if (is_primitive(java_class)) { 1301 name = vmSymbols::type_signature(primitive_type(java_class)); 1302 // Because this can create a new symbol, the caller has to decrement 1303 // the refcount, so make adjustment here and below for symbols returned 1304 // that are not created or incremented due to a successful lookup. 1305 name->increment_refcount(); 1306 } else { 1307 Klass* k = as_Klass(java_class); 1308 if (!k->is_instance_klass()) { 1309 name = k->name(); 1310 name->increment_refcount(); 1311 } else { 1312 ResourceMark rm; 1313 const char* sigstr = k->signature_name(); 1314 int siglen = (int) strlen(sigstr); 1315 if (!intern_if_not_found) { 1316 name = SymbolTable::probe(sigstr, siglen); 1317 } else { 1318 name = SymbolTable::new_symbol(sigstr, siglen); 1319 } 1320 } 1321 } 1322 return name; 1323 } 1324 1325 // Returns the Java name for this Java mirror (Resource allocated) 1326 // See Klass::external_name(). 1327 // For primitive type Java mirrors, its type name is returned. 1328 const char* java_lang_Class::as_external_name(oop java_class) { 1329 assert(is_instance(java_class), "must be a Class object"); 1330 const char* name = nullptr; 1331 if (is_primitive(java_class)) { 1332 name = type2name(primitive_type(java_class)); 1333 } else { 1334 name = as_Klass(java_class)->external_name(); 1335 } 1336 if (name == nullptr) { 1337 name = "<null>"; 1338 } 1339 return name; 1340 } 1341 1342 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1343 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1344 assert(k == nullptr || k->is_klass() && k->is_array_klass(), "should be array klass"); 1345 return k; 1346 } 1347 1348 1349 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1350 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1351 java_class->release_metadata_field_put(_array_klass_offset, klass); 1352 } 1353 1354 1355 BasicType java_lang_Class::primitive_type(oop java_class) { 1356 assert(is_primitive(java_class), "just checking"); 1357 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1358 BasicType type = T_VOID; 1359 if (ak != nullptr) { 1360 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1361 type = ArrayKlass::cast(ak)->element_type(); 1362 } else { 1363 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1364 } 1365 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1366 return type; 1367 } 1368 1369 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1370 assert(is_instance(java_class), "must be a Class object"); 1371 if (is_primitive(java_class)) { 1372 if (reference_klass != nullptr) 1373 (*reference_klass) = nullptr; 1374 return primitive_type(java_class); 1375 } else { 1376 if (reference_klass != nullptr) 1377 (*reference_klass) = as_Klass(java_class); 1378 return T_OBJECT; 1379 } 1380 } 1381 1382 1383 oop java_lang_Class::primitive_mirror(BasicType t) { 1384 oop mirror = Universe::java_mirror(t); 1385 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class"); 1386 assert(is_primitive(mirror), "must be primitive"); 1387 return mirror; 1388 } 1389 1390 #define CLASS_FIELDS_DO(macro) \ 1391 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \ 1392 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1393 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1394 macro(_module_offset, k, "module", module_signature, false); \ 1395 macro(_name_offset, k, "name", string_signature, false); \ 1396 macro(_classData_offset, k, "classData", object_signature, false); 1397 1398 void java_lang_Class::compute_offsets() { 1399 if (_offsets_computed) { 1400 return; 1401 } 1402 1403 _offsets_computed = true; 1404 1405 InstanceKlass* k = vmClasses::Class_klass(); 1406 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1407 1408 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1409 } 1410 1411 #if INCLUDE_CDS 1412 void java_lang_Class::serialize_offsets(SerializeClosure* f) { 1413 f->do_bool(&_offsets_computed); 1414 1415 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1416 1417 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1418 } 1419 #endif 1420 1421 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1422 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1423 return the_class_mirror->int_field(_classRedefinedCount_offset); 1424 } 1425 1426 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1427 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1428 the_class_mirror->int_field_put(_classRedefinedCount_offset, value); 1429 } 1430 1431 1432 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1433 // platform thread structure, and a eetop offset which was used for thread 1434 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1435 // merged, so in the HotSpot VM we just use the eetop field for the thread 1436 // instead of the privateInfo_offset. 1437 // 1438 // Note: The stackSize field is only present starting in 1.4. 1439 1440 int java_lang_Thread_FieldHolder::_group_offset; 1441 int java_lang_Thread_FieldHolder::_priority_offset; 1442 int java_lang_Thread_FieldHolder::_stackSize_offset; 1443 int java_lang_Thread_FieldHolder::_daemon_offset; 1444 int java_lang_Thread_FieldHolder::_thread_status_offset; 1445 1446 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \ 1447 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1448 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1449 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1450 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1451 macro(_thread_status_offset, k, "threadStatus", int_signature, false) 1452 1453 void java_lang_Thread_FieldHolder::compute_offsets() { 1454 assert(_group_offset == 0, "offsets should be initialized only once"); 1455 1456 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass(); 1457 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1458 } 1459 1460 #if INCLUDE_CDS 1461 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) { 1462 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1463 } 1464 #endif 1465 1466 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) { 1467 return holder->obj_field(_group_offset); 1468 } 1469 1470 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) { 1471 return (ThreadPriority)holder->int_field(_priority_offset); 1472 } 1473 1474 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) { 1475 holder->int_field_put(_priority_offset, priority); 1476 } 1477 1478 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) { 1479 return holder->long_field(_stackSize_offset); 1480 } 1481 1482 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) { 1483 return holder->bool_field(_daemon_offset) != 0; 1484 } 1485 1486 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) { 1487 assert(val, "daemon status is never turned off"); 1488 holder->bool_field_put(_daemon_offset, val); 1489 } 1490 1491 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) { 1492 holder->int_field_put(_thread_status_offset, static_cast<int>(status)); 1493 } 1494 1495 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) { 1496 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset)); 1497 } 1498 1499 1500 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0; 1501 1502 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \ 1503 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true); 1504 1505 void java_lang_Thread_Constants::compute_offsets() { 1506 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once"); 1507 1508 InstanceKlass* k = vmClasses::Thread_Constants_klass(); 1509 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1510 } 1511 1512 #if INCLUDE_CDS 1513 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) { 1514 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1515 } 1516 #endif 1517 1518 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() { 1519 InstanceKlass* k = vmClasses::Thread_Constants_klass(); 1520 oop base = k->static_field_base_raw(); 1521 return base->obj_field(_static_VTHREAD_GROUP_offset); 1522 } 1523 1524 1525 int java_lang_Thread::_holder_offset; 1526 int java_lang_Thread::_name_offset; 1527 int java_lang_Thread::_contextClassLoader_offset; 1528 int java_lang_Thread::_inheritedAccessControlContext_offset; 1529 int java_lang_Thread::_eetop_offset; 1530 int java_lang_Thread::_jvmti_thread_state_offset; 1531 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset; 1532 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset; 1533 int java_lang_Thread::_interrupted_offset; 1534 int java_lang_Thread::_tid_offset; 1535 int java_lang_Thread::_continuation_offset; 1536 int java_lang_Thread::_park_blocker_offset; 1537 int java_lang_Thread::_scopedValueBindings_offset; 1538 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;) 1539 1540 #define THREAD_FIELDS_DO(macro) \ 1541 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \ 1542 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1543 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \ 1544 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \ 1545 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1546 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \ 1547 macro(_tid_offset, k, "tid", long_signature, false); \ 1548 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \ 1549 macro(_continuation_offset, k, "cont", continuation_signature, false); \ 1550 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false); 1551 1552 void java_lang_Thread::compute_offsets() { 1553 assert(_holder_offset == 0, "offsets should be initialized only once"); 1554 1555 InstanceKlass* k = vmClasses::Thread_klass(); 1556 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1557 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1558 } 1559 1560 #if INCLUDE_CDS 1561 void java_lang_Thread::serialize_offsets(SerializeClosure* f) { 1562 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1563 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1564 } 1565 #endif 1566 1567 JavaThread* java_lang_Thread::thread(oop java_thread) { 1568 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset)); 1569 } 1570 1571 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1572 java_thread->address_field_put(_eetop_offset, (address)thread); 1573 } 1574 1575 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) { 1576 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset); 1577 } 1578 1579 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) { 1580 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state); 1581 } 1582 1583 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) { 1584 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset); 1585 } 1586 1587 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) { 1588 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked"); 1589 int val = VTMS_transition_disable_count(java_thread); 1590 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1); 1591 } 1592 1593 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) { 1594 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked"); 1595 int val = VTMS_transition_disable_count(java_thread); 1596 assert(val > 0, "VTMS_transition_disable_count should never be negative"); 1597 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1); 1598 } 1599 1600 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) { 1601 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset); 1602 } 1603 1604 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) { 1605 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val); 1606 } 1607 1608 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) { 1609 assert(java_thread != nullptr, "need a java_lang_Thread pointer here"); 1610 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr); 1611 } 1612 1613 oop java_lang_Thread::holder(oop java_thread) { 1614 // Note: may return null if the thread is still attaching 1615 return java_thread->obj_field(_holder_offset); 1616 } 1617 1618 bool java_lang_Thread::interrupted(oop java_thread) { 1619 // Make sure the caller can safely access oops. 1620 assert(Thread::current()->is_VM_thread() || 1621 (JavaThread::current()->thread_state() != _thread_blocked && 1622 JavaThread::current()->thread_state() != _thread_in_native), 1623 "Unsafe access to oop"); 1624 return java_thread->bool_field_volatile(_interrupted_offset); 1625 } 1626 1627 void java_lang_Thread::set_interrupted(oop java_thread, bool val) { 1628 // Make sure the caller can safely access oops. 1629 assert(Thread::current()->is_VM_thread() || 1630 (JavaThread::current()->thread_state() != _thread_blocked && 1631 JavaThread::current()->thread_state() != _thread_in_native), 1632 "Unsafe access to oop"); 1633 java_thread->bool_field_put_volatile(_interrupted_offset, val); 1634 } 1635 1636 1637 oop java_lang_Thread::name(oop java_thread) { 1638 return java_thread->obj_field(_name_offset); 1639 } 1640 1641 1642 void java_lang_Thread::set_name(oop java_thread, oop name) { 1643 java_thread->obj_field_put(_name_offset, name); 1644 } 1645 1646 // Convenience macros for setting and getting Thread fields that 1647 // are actually stored in the FieldHolder object of the thread. 1648 // The FieldHolder can be null whilst a thread is attaching via 1649 // JNI, and when the main thread is attaching. 1650 1651 // The default value should be the default/zero initialized value 1652 // of the field as it would be in java.lang.Thread.FieldHolder. 1653 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \ 1654 { \ 1655 oop holder = java_lang_Thread::holder(java_thread); \ 1656 if (holder != nullptr) \ 1657 return java_lang_Thread_FieldHolder::field(holder); \ 1658 else \ 1659 return default_val; \ 1660 } 1661 1662 // We should never be trying to set a field of an attaching thread. 1663 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \ 1664 { \ 1665 oop holder = java_lang_Thread::holder(java_thread); \ 1666 assert(holder != nullptr, "Thread not fully initialized"); \ 1667 java_lang_Thread_FieldHolder::set_##field(holder, value); \ 1668 } 1669 1670 1671 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1672 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0); 1673 } 1674 1675 1676 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1677 SET_FIELDHOLDER_FIELD(java_thread, priority, priority) 1678 } 1679 1680 1681 oop java_lang_Thread::threadGroup(oop java_thread) { 1682 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr); 1683 } 1684 1685 1686 bool java_lang_Thread::is_alive(oop java_thread) { 1687 JavaThread* thr = java_lang_Thread::thread(java_thread); 1688 return (thr != nullptr); 1689 } 1690 1691 1692 bool java_lang_Thread::is_daemon(oop java_thread) { 1693 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false); 1694 } 1695 1696 1697 void java_lang_Thread::set_daemon(oop java_thread) { 1698 SET_FIELDHOLDER_FIELD(java_thread, daemon, true); 1699 } 1700 1701 oop java_lang_Thread::context_class_loader(oop java_thread) { 1702 return java_thread->obj_field(_contextClassLoader_offset); 1703 } 1704 1705 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1706 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1707 } 1708 1709 1710 jlong java_lang_Thread::stackSize(oop java_thread) { 1711 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0); 1712 } 1713 1714 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1715 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) { 1716 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status); 1717 } 1718 1719 // Read thread status value from threadStatus field in java.lang.Thread java class. 1720 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1721 // Make sure the caller is operating on behalf of the VM or is 1722 // running VM code (state == _thread_in_vm). 1723 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1724 JavaThread::current()->thread_state() == _thread_in_vm, 1725 "Java Thread is not running in vm"); 1726 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */); 1727 } 1728 1729 ByteSize java_lang_Thread::thread_id_offset() { 1730 return in_ByteSize(_tid_offset); 1731 } 1732 1733 oop java_lang_Thread::park_blocker(oop java_thread) { 1734 return java_thread->obj_field(_park_blocker_offset); 1735 } 1736 1737 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) { 1738 ThreadsListHandle tlh(JavaThread::current()); 1739 JavaThread* thread; 1740 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread); 1741 if (is_virtual) { 1742 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread); 1743 if (carrier_thread == nullptr) { 1744 return nullptr; 1745 } 1746 thread = java_lang_Thread::thread(carrier_thread); 1747 } else { 1748 thread = java_lang_Thread::thread(java_thread); 1749 } 1750 if (thread == nullptr) { 1751 return nullptr; 1752 } 1753 1754 class GetStackTraceClosure : public HandshakeClosure { 1755 public: 1756 const Handle _java_thread; 1757 int _depth; 1758 bool _retry_handshake; 1759 GrowableArray<Method*>* _methods; 1760 GrowableArray<int>* _bcis; 1761 1762 GetStackTraceClosure(Handle java_thread) : 1763 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false), 1764 _methods(nullptr), _bcis(nullptr) { 1765 } 1766 ~GetStackTraceClosure() { 1767 delete _methods; 1768 delete _bcis; 1769 } 1770 1771 bool read_reset_retry() { 1772 bool ret = _retry_handshake; 1773 // If we re-execute the handshake this method need to return false 1774 // when the handshake cannot be performed. (E.g. thread terminating) 1775 _retry_handshake = false; 1776 return ret; 1777 } 1778 1779 void do_thread(Thread* th) { 1780 if (!Thread::current()->is_Java_thread()) { 1781 _retry_handshake = true; 1782 return; 1783 } 1784 1785 JavaThread* thread = JavaThread::cast(th); 1786 1787 if (!thread->has_last_Java_frame()) { 1788 return; 1789 } 1790 1791 bool carrier = false; 1792 if (java_lang_VirtualThread::is_instance(_java_thread())) { 1793 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread 1794 const ContinuationEntry* ce = thread->vthread_continuation(); 1795 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) { 1796 return; // not mounted 1797 } 1798 } else { 1799 carrier = (thread->vthread_continuation() != nullptr); 1800 } 1801 1802 const int max_depth = MaxJavaStackTraceDepth; 1803 const bool skip_hidden = !ShowHiddenFrames; 1804 1805 // Pick minimum length that will cover most cases 1806 int init_length = 64; 1807 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal); 1808 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal); 1809 1810 int total_count = 0; 1811 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops 1812 !vfst.at_end() && (max_depth == 0 || max_depth != total_count); 1813 vfst.next()) { 1814 1815 if (skip_hidden && (vfst.method()->is_hidden() || 1816 vfst.method()->is_continuation_enter_intrinsic())) { 1817 continue; 1818 } 1819 1820 _methods->push(vfst.method()); 1821 _bcis->push(vfst.bci()); 1822 total_count++; 1823 } 1824 1825 _depth = total_count; 1826 } 1827 }; 1828 1829 // Handshake with target 1830 ResourceMark rm(THREAD); 1831 HandleMark hm(THREAD); 1832 GetStackTraceClosure gstc(Handle(THREAD, java_thread)); 1833 do { 1834 Handshake::execute(&gstc, &tlh, thread); 1835 } while (gstc.read_reset_retry()); 1836 1837 // Stop if no stack trace is found. 1838 if (gstc._depth == 0) { 1839 return nullptr; 1840 } 1841 1842 // Convert to StackTraceElement array 1843 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 1844 assert(k != nullptr, "must be loaded in 1.4+"); 1845 if (k->should_be_initialized()) { 1846 k->initialize(CHECK_NULL); 1847 } 1848 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL); 1849 1850 for (int i = 0; i < gstc._depth; i++) { 1851 methodHandle method(THREAD, gstc._methods->at(i)); 1852 oop element = java_lang_StackTraceElement::create(method, 1853 gstc._bcis->at(i), 1854 CHECK_NULL); 1855 trace->obj_at_put(i, element); 1856 } 1857 1858 return trace(); 1859 } 1860 1861 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1862 JavaThreadStatus status = get_thread_status(java_thread); 1863 switch (status) { 1864 case JavaThreadStatus::NEW : return "NEW"; 1865 case JavaThreadStatus::RUNNABLE : return "RUNNABLE"; 1866 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)"; 1867 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1868 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1869 case JavaThreadStatus::PARKED : return "WAITING (parking)"; 1870 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)"; 1871 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1872 case JavaThreadStatus::TERMINATED : return "TERMINATED"; 1873 default : return "UNKNOWN"; 1874 }; 1875 } 1876 int java_lang_ThreadGroup::_parent_offset; 1877 int java_lang_ThreadGroup::_name_offset; 1878 int java_lang_ThreadGroup::_maxPriority_offset; 1879 int java_lang_ThreadGroup::_daemon_offset; 1880 1881 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1882 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1883 return java_thread_group->obj_field(_parent_offset); 1884 } 1885 1886 // ("name as oop" accessor is not necessary) 1887 1888 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1889 oop name = java_thread_group->obj_field(_name_offset); 1890 // ThreadGroup.name can be null 1891 if (name != nullptr) { 1892 return java_lang_String::as_utf8_string(name); 1893 } 1894 return nullptr; 1895 } 1896 1897 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1898 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1899 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1900 } 1901 1902 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1903 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1904 return java_thread_group->bool_field(_daemon_offset) != 0; 1905 } 1906 1907 #define THREADGROUP_FIELDS_DO(macro) \ 1908 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \ 1909 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1910 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \ 1911 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); 1912 1913 void java_lang_ThreadGroup::compute_offsets() { 1914 assert(_parent_offset == 0, "offsets should be initialized only once"); 1915 1916 InstanceKlass* k = vmClasses::ThreadGroup_klass(); 1917 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1918 } 1919 1920 #if INCLUDE_CDS 1921 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) { 1922 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1923 } 1924 #endif 1925 1926 1927 // java_lang_VirtualThread 1928 1929 int java_lang_VirtualThread::static_vthread_scope_offset; 1930 int java_lang_VirtualThread::_carrierThread_offset; 1931 int java_lang_VirtualThread::_continuation_offset; 1932 int java_lang_VirtualThread::_state_offset; 1933 1934 #define VTHREAD_FIELDS_DO(macro) \ 1935 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \ 1936 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \ 1937 macro(_continuation_offset, k, "cont", continuation_signature, false); \ 1938 macro(_state_offset, k, "state", int_signature, false) 1939 1940 1941 void java_lang_VirtualThread::compute_offsets() { 1942 InstanceKlass* k = vmClasses::VirtualThread_klass(); 1943 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1944 } 1945 1946 bool java_lang_VirtualThread::is_instance(oop obj) { 1947 return obj != nullptr && is_subclass(obj->klass()); 1948 } 1949 1950 oop java_lang_VirtualThread::carrier_thread(oop vthread) { 1951 oop thread = vthread->obj_field(_carrierThread_offset); 1952 return thread; 1953 } 1954 1955 oop java_lang_VirtualThread::continuation(oop vthread) { 1956 oop cont = vthread->obj_field(_continuation_offset); 1957 return cont; 1958 } 1959 1960 int java_lang_VirtualThread::state(oop vthread) { 1961 return vthread->int_field_acquire(_state_offset); 1962 } 1963 1964 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) { 1965 JavaThreadStatus status = JavaThreadStatus::NEW; 1966 switch (state) { 1967 case NEW : 1968 status = JavaThreadStatus::NEW; 1969 break; 1970 case STARTED : 1971 case RUNNABLE : 1972 case RUNNABLE_SUSPENDED : 1973 case RUNNING : 1974 case PARKING : 1975 case YIELDING : 1976 status = JavaThreadStatus::RUNNABLE; 1977 break; 1978 case PARKED : 1979 case PARKED_SUSPENDED : 1980 case PINNED : 1981 status = JavaThreadStatus::PARKED; 1982 break; 1983 case TERMINATED : 1984 status = JavaThreadStatus::TERMINATED; 1985 break; 1986 default: 1987 ShouldNotReachHere(); 1988 } 1989 return status; 1990 } 1991 1992 #if INCLUDE_CDS 1993 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) { 1994 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1995 } 1996 #endif 1997 1998 // java_lang_Throwable 1999 2000 int java_lang_Throwable::_backtrace_offset; 2001 int java_lang_Throwable::_detailMessage_offset; 2002 int java_lang_Throwable::_stackTrace_offset; 2003 int java_lang_Throwable::_depth_offset; 2004 int java_lang_Throwable::_cause_offset; 2005 int java_lang_Throwable::_static_unassigned_stacktrace_offset; 2006 2007 #define THROWABLE_FIELDS_DO(macro) \ 2008 macro(_backtrace_offset, k, "backtrace", object_signature, false); \ 2009 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \ 2010 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 2011 macro(_depth_offset, k, "depth", int_signature, false); \ 2012 macro(_cause_offset, k, "cause", throwable_signature, false); \ 2013 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 2014 2015 void java_lang_Throwable::compute_offsets() { 2016 InstanceKlass* k = vmClasses::Throwable_klass(); 2017 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2018 } 2019 2020 #if INCLUDE_CDS 2021 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) { 2022 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2023 } 2024 #endif 2025 2026 oop java_lang_Throwable::unassigned_stacktrace() { 2027 InstanceKlass* ik = vmClasses::Throwable_klass(); 2028 oop base = ik->static_field_base_raw(); 2029 return base->obj_field(_static_unassigned_stacktrace_offset); 2030 } 2031 2032 oop java_lang_Throwable::backtrace(oop throwable) { 2033 return throwable->obj_field_acquire(_backtrace_offset); 2034 } 2035 2036 2037 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 2038 throwable->release_obj_field_put(_backtrace_offset, value); 2039 } 2040 2041 int java_lang_Throwable::depth(oop throwable) { 2042 return throwable->int_field(_depth_offset); 2043 } 2044 2045 void java_lang_Throwable::set_depth(oop throwable, int value) { 2046 throwable->int_field_put(_depth_offset, value); 2047 } 2048 2049 oop java_lang_Throwable::message(oop throwable) { 2050 return throwable->obj_field(_detailMessage_offset); 2051 } 2052 2053 oop java_lang_Throwable::cause(oop throwable) { 2054 return throwable->obj_field(_cause_offset); 2055 } 2056 2057 // Return Symbol for detailed_message or null 2058 Symbol* java_lang_Throwable::detail_message(oop throwable) { 2059 PreserveExceptionMark pm(Thread::current()); 2060 oop detailed_message = java_lang_Throwable::message(throwable); 2061 if (detailed_message != nullptr) { 2062 return java_lang_String::as_symbol(detailed_message); 2063 } 2064 return nullptr; 2065 } 2066 2067 void java_lang_Throwable::set_message(oop throwable, oop value) { 2068 throwable->obj_field_put(_detailMessage_offset, value); 2069 } 2070 2071 2072 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 2073 throwable->obj_field_put(_stackTrace_offset, st_element_array); 2074 } 2075 2076 void java_lang_Throwable::clear_stacktrace(oop throwable) { 2077 set_stacktrace(throwable, nullptr); 2078 } 2079 2080 2081 void java_lang_Throwable::print(oop throwable, outputStream* st) { 2082 ResourceMark rm; 2083 Klass* k = throwable->klass(); 2084 assert(k != nullptr, "just checking"); 2085 st->print("%s", k->external_name()); 2086 oop msg = message(throwable); 2087 if (msg != nullptr) { 2088 st->print(": %s", java_lang_String::as_utf8_string(msg)); 2089 } 2090 } 2091 2092 // After this many redefines, the stack trace is unreliable. 2093 const int MAX_VERSION = USHRT_MAX; 2094 2095 static inline bool version_matches(Method* method, int version) { 2096 assert(version < MAX_VERSION, "version is too big"); 2097 return method != nullptr && (method->constants()->version() == version); 2098 } 2099 2100 // This class provides a simple wrapper over the internal structure of 2101 // exception backtrace to insulate users of the backtrace from needing 2102 // to know what it looks like. 2103 // The code of this class is not GC safe. Allocations can only happen 2104 // in expand(). 2105 class BacktraceBuilder: public StackObj { 2106 friend class BacktraceIterator; 2107 private: 2108 Handle _backtrace; 2109 objArrayOop _head; 2110 typeArrayOop _methods; 2111 typeArrayOop _bcis; 2112 objArrayOop _mirrors; 2113 typeArrayOop _names; // Needed to insulate method name against redefinition. 2114 // True if the top frame of the backtrace is omitted because it shall be hidden. 2115 bool _has_hidden_top_frame; 2116 int _index; 2117 NoSafepointVerifier _nsv; 2118 2119 enum { 2120 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 2121 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 2122 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 2123 trace_names_offset = java_lang_Throwable::trace_names_offset, 2124 trace_conts_offset = java_lang_Throwable::trace_conts_offset, 2125 trace_next_offset = java_lang_Throwable::trace_next_offset, 2126 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset, 2127 trace_size = java_lang_Throwable::trace_size, 2128 trace_chunk_size = java_lang_Throwable::trace_chunk_size 2129 }; 2130 2131 // get info out of chunks 2132 static typeArrayOop get_methods(objArrayHandle chunk) { 2133 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 2134 assert(methods != nullptr, "method array should be initialized in backtrace"); 2135 return methods; 2136 } 2137 static typeArrayOop get_bcis(objArrayHandle chunk) { 2138 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 2139 assert(bcis != nullptr, "bci array should be initialized in backtrace"); 2140 return bcis; 2141 } 2142 static objArrayOop get_mirrors(objArrayHandle chunk) { 2143 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 2144 assert(mirrors != nullptr, "mirror array should be initialized in backtrace"); 2145 return mirrors; 2146 } 2147 static typeArrayOop get_names(objArrayHandle chunk) { 2148 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 2149 assert(names != nullptr, "names array should be initialized in backtrace"); 2150 return names; 2151 } 2152 static bool has_hidden_top_frame(objArrayHandle chunk) { 2153 oop hidden = chunk->obj_at(trace_hidden_offset); 2154 return hidden != nullptr; 2155 } 2156 2157 public: 2158 2159 // constructor for new backtrace 2160 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) { 2161 expand(CHECK); 2162 _backtrace = Handle(THREAD, _head); 2163 _index = 0; 2164 } 2165 2166 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 2167 _methods = get_methods(backtrace); 2168 _bcis = get_bcis(backtrace); 2169 _mirrors = get_mirrors(backtrace); 2170 _names = get_names(backtrace); 2171 _has_hidden_top_frame = has_hidden_top_frame(backtrace); 2172 assert(_methods->length() == _bcis->length() && 2173 _methods->length() == _mirrors->length() && 2174 _mirrors->length() == _names->length(), 2175 "method and source information arrays should match"); 2176 2177 // head is the preallocated backtrace 2178 _head = backtrace(); 2179 _backtrace = Handle(thread, _head); 2180 _index = 0; 2181 } 2182 2183 void expand(TRAPS) { 2184 objArrayHandle old_head(THREAD, _head); 2185 PauseNoSafepointVerifier pnsv(&_nsv); 2186 2187 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2188 objArrayHandle new_head(THREAD, head); 2189 2190 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2191 typeArrayHandle new_methods(THREAD, methods); 2192 2193 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2194 typeArrayHandle new_bcis(THREAD, bcis); 2195 2196 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2197 objArrayHandle new_mirrors(THREAD, mirrors); 2198 2199 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2200 typeArrayHandle new_names(THREAD, names); 2201 2202 if (!old_head.is_null()) { 2203 old_head->obj_at_put(trace_next_offset, new_head()); 2204 } 2205 new_head->obj_at_put(trace_methods_offset, new_methods()); 2206 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2207 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2208 new_head->obj_at_put(trace_names_offset, new_names()); 2209 new_head->obj_at_put(trace_hidden_offset, nullptr); 2210 2211 _head = new_head(); 2212 _methods = new_methods(); 2213 _bcis = new_bcis(); 2214 _mirrors = new_mirrors(); 2215 _names = new_names(); 2216 _index = 0; 2217 } 2218 2219 oop backtrace() { 2220 return _backtrace(); 2221 } 2222 2223 inline void push(Method* method, int bci, TRAPS) { 2224 // Smear the -1 bci to 0 since the array only holds unsigned 2225 // shorts. The later line number lookup would just smear the -1 2226 // to a 0 even if it could be recorded. 2227 if (bci == SynchronizationEntryBCI) bci = 0; 2228 2229 if (_index >= trace_chunk_size) { 2230 methodHandle mhandle(THREAD, method); 2231 expand(CHECK); 2232 method = mhandle(); 2233 } 2234 2235 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2236 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2237 2238 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2239 // klass owning the symbols alive so their refcounts aren't decremented. 2240 Symbol* name = method->name(); 2241 _names->symbol_at_put(_index, name); 2242 2243 // We need to save the mirrors in the backtrace to keep the class 2244 // from being unloaded while we still have this stack trace. 2245 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror"); 2246 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2247 2248 _index++; 2249 } 2250 2251 void set_has_hidden_top_frame() { 2252 if (!_has_hidden_top_frame) { 2253 // It would be nice to add java/lang/Boolean::TRUE here 2254 // to indicate that this backtrace has a hidden top frame. 2255 // But this code is used before TRUE is allocated. 2256 // Therefore let's just use an arbitrary legal oop 2257 // available right here. _methods is a short[]. 2258 assert(_methods != nullptr, "we need a legal oop"); 2259 _has_hidden_top_frame = true; 2260 _head->obj_at_put(trace_hidden_offset, _methods); 2261 } 2262 } 2263 }; 2264 2265 struct BacktraceElement : public StackObj { 2266 int _method_id; 2267 int _bci; 2268 int _version; 2269 Symbol* _name; 2270 Handle _mirror; 2271 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2272 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {} 2273 }; 2274 2275 class BacktraceIterator : public StackObj { 2276 int _index; 2277 objArrayHandle _result; 2278 objArrayHandle _mirrors; 2279 typeArrayHandle _methods; 2280 typeArrayHandle _bcis; 2281 typeArrayHandle _names; 2282 2283 void init(objArrayHandle result, Thread* thread) { 2284 // Get method id, bci, version and mirror from chunk 2285 _result = result; 2286 if (_result.not_null()) { 2287 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2288 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2289 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2290 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2291 _index = 0; 2292 } 2293 } 2294 public: 2295 BacktraceIterator(objArrayHandle result, Thread* thread) { 2296 init(result, thread); 2297 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2298 } 2299 2300 BacktraceElement next(Thread* thread) { 2301 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2302 _methods->ushort_at(_index), 2303 Backtrace::version_at(_bcis->int_at(_index)), 2304 Backtrace::bci_at(_bcis->int_at(_index)), 2305 _names->symbol_at(_index)); 2306 _index++; 2307 2308 if (_index >= java_lang_Throwable::trace_chunk_size) { 2309 int next_offset = java_lang_Throwable::trace_next_offset; 2310 // Get next chunk 2311 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2312 init(result, thread); 2313 } 2314 return e; 2315 } 2316 2317 bool repeat() { 2318 return _result.not_null() && _mirrors->obj_at(_index) != nullptr; 2319 } 2320 }; 2321 2322 2323 // Print stack trace element to resource allocated buffer 2324 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 2325 int version, int bci, Symbol* name) { 2326 ResourceMark rm; 2327 2328 // Get strings and string lengths 2329 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2330 const char* klass_name = holder->external_name(); 2331 int buf_len = (int)strlen(klass_name); 2332 2333 char* method_name = name->as_C_string(); 2334 buf_len += (int)strlen(method_name); 2335 2336 char* source_file_name = nullptr; 2337 Symbol* source = Backtrace::get_source_file_name(holder, version); 2338 if (source != nullptr) { 2339 source_file_name = source->as_C_string(); 2340 buf_len += (int)strlen(source_file_name); 2341 } 2342 2343 char *module_name = nullptr, *module_version = nullptr; 2344 ModuleEntry* module = holder->module(); 2345 if (module->is_named()) { 2346 module_name = module->name()->as_C_string(); 2347 buf_len += (int)strlen(module_name); 2348 if (module->version() != nullptr) { 2349 module_version = module->version()->as_C_string(); 2350 buf_len += (int)strlen(module_version); 2351 } 2352 } 2353 2354 // Allocate temporary buffer with extra space for formatting and line number 2355 const size_t buf_size = buf_len + 64; 2356 char* buf = NEW_RESOURCE_ARRAY(char, buf_size); 2357 2358 // Print stack trace line in buffer 2359 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name); 2360 2361 // Print module information 2362 if (module_name != nullptr) { 2363 if (module_version != nullptr) { 2364 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version); 2365 } else { 2366 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name); 2367 } 2368 } 2369 2370 // The method can be null if the requested class version is gone 2371 Method* method = holder->method_with_orig_idnum(method_id, version); 2372 if (!version_matches(method, version)) { 2373 strcat(buf, "Redefined)"); 2374 } else { 2375 int line_number = Backtrace::get_line_number(method, bci); 2376 if (line_number == -2) { 2377 strcat(buf, "Native Method)"); 2378 } else { 2379 if (source_file_name != nullptr && (line_number != -1)) { 2380 // Sourcename and linenumber 2381 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number); 2382 } else if (source_file_name != nullptr) { 2383 // Just sourcename 2384 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name); 2385 } else { 2386 // Neither sourcename nor linenumber 2387 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)"); 2388 } 2389 CompiledMethod* nm = method->code(); 2390 if (WizardMode && nm != nullptr) { 2391 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 2392 } 2393 } 2394 } 2395 2396 st->print_cr("%s", buf); 2397 } 2398 2399 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) { 2400 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 2401 int method_id = method->orig_method_idnum(); 2402 int version = method->constants()->version(); 2403 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 2404 } 2405 2406 /** 2407 * Print the throwable message and its stack trace plus all causes by walking the 2408 * cause chain. The output looks the same as of Throwable.printStackTrace(). 2409 */ 2410 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 2411 // First, print the message. 2412 print(throwable(), st); 2413 st->cr(); 2414 2415 // Now print the stack trace. 2416 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2417 while (throwable.not_null()) { 2418 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 2419 if (result.is_null()) { 2420 st->print_raw_cr("\t<<no stack trace available>>"); 2421 return; 2422 } 2423 BacktraceIterator iter(result, THREAD); 2424 2425 while (iter.repeat()) { 2426 BacktraceElement bte = iter.next(THREAD); 2427 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 2428 } 2429 { 2430 // Call getCause() which doesn't necessarily return the _cause field. 2431 ExceptionMark em(THREAD); 2432 JavaValue cause(T_OBJECT); 2433 JavaCalls::call_virtual(&cause, 2434 throwable, 2435 throwable->klass(), 2436 vmSymbols::getCause_name(), 2437 vmSymbols::void_throwable_signature(), 2438 THREAD); 2439 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 2440 if (HAS_PENDING_EXCEPTION) { 2441 CLEAR_PENDING_EXCEPTION; 2442 throwable = Handle(); 2443 } else { 2444 throwable = Handle(THREAD, cause.get_oop()); 2445 if (throwable.not_null()) { 2446 st->print("Caused by: "); 2447 print(throwable(), st); 2448 st->cr(); 2449 } 2450 } 2451 } 2452 } 2453 } 2454 2455 /** 2456 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 2457 */ 2458 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 2459 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected"); 2460 JavaValue result(T_VOID); 2461 JavaCalls::call_virtual(&result, 2462 throwable, 2463 vmClasses::Throwable_klass(), 2464 vmSymbols::printStackTrace_name(), 2465 vmSymbols::void_method_signature(), 2466 THREAD); 2467 } 2468 2469 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 2470 if (!StackTraceInThrowable) return; 2471 ResourceMark rm(THREAD); 2472 2473 // Start out by clearing the backtrace for this object, in case the VM 2474 // runs out of memory while allocating the stack trace 2475 set_backtrace(throwable(), nullptr); 2476 // Clear lazily constructed Java level stacktrace if refilling occurs 2477 // This is unnecessary in 1.7+ but harmless 2478 clear_stacktrace(throwable()); 2479 2480 int max_depth = MaxJavaStackTraceDepth; 2481 JavaThread* thread = THREAD; 2482 2483 BacktraceBuilder bt(CHECK); 2484 2485 // If there is no Java frame just return the method that was being called 2486 // with bci 0 2487 if (!thread->has_last_Java_frame()) { 2488 if (max_depth >= 1 && method() != nullptr) { 2489 bt.push(method(), 0, CHECK); 2490 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 2491 set_depth(throwable(), 1); 2492 set_backtrace(throwable(), bt.backtrace()); 2493 } 2494 return; 2495 } 2496 2497 // Instead of using vframe directly, this version of fill_in_stack_trace 2498 // basically handles everything by hand. This significantly improved the 2499 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 2500 // See bug 6333838 for more details. 2501 // The "ASSERT" here is to verify this method generates the exactly same stack 2502 // trace as utilizing vframe. 2503 #ifdef ASSERT 2504 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */); 2505 #endif 2506 int total_count = 0; 2507 RegisterMap map(thread, 2508 RegisterMap::UpdateMap::skip, 2509 RegisterMap::ProcessFrames::skip, 2510 RegisterMap::WalkContinuation::include); 2511 int decode_offset = 0; 2512 CompiledMethod* nm = nullptr; 2513 bool skip_fillInStackTrace_check = false; 2514 bool skip_throwableInit_check = false; 2515 bool skip_hidden = !ShowHiddenFrames; 2516 bool show_carrier = ShowCarrierFrames; 2517 ContinuationEntry* cont_entry = thread->last_continuation(); 2518 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 2519 Method* method = nullptr; 2520 int bci = 0; 2521 2522 // Compiled java method case. 2523 if (decode_offset != 0) { 2524 DebugInfoReadStream stream(nm, decode_offset); 2525 decode_offset = stream.read_int(); 2526 method = (Method*)nm->metadata_at(stream.read_int()); 2527 bci = stream.read_bci(); 2528 } else { 2529 if (fr.is_first_frame()) break; 2530 2531 if (Continuation::is_continuation_enterSpecial(fr)) { 2532 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), ""); 2533 if (!show_carrier && cont_entry->is_virtual_thread()) { 2534 break; 2535 } 2536 cont_entry = cont_entry->parent(); 2537 } 2538 2539 address pc = fr.pc(); 2540 if (fr.is_interpreted_frame()) { 2541 address bcp; 2542 if (!map.in_cont()) { 2543 bcp = fr.interpreter_frame_bcp(); 2544 method = fr.interpreter_frame_method(); 2545 } else { 2546 bcp = map.stack_chunk()->interpreter_frame_bcp(fr); 2547 method = map.stack_chunk()->interpreter_frame_method(fr); 2548 } 2549 bci = method->bci_from(bcp); 2550 fr = fr.sender(&map); 2551 } else { 2552 CodeBlob* cb = fr.cb(); 2553 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null 2554 // but non nmethod 2555 fr = fr.sender(&map); 2556 if (cb == nullptr || !cb->is_compiled()) { 2557 continue; 2558 } 2559 nm = cb->as_compiled_method(); 2560 assert(nm->method() != nullptr, "must be"); 2561 if (nm->method()->is_native()) { 2562 method = nm->method(); 2563 bci = 0; 2564 } else { 2565 PcDesc* pd = nm->pc_desc_at(pc); 2566 decode_offset = pd->scope_decode_offset(); 2567 // if decode_offset is not equal to 0, it will execute the 2568 // "compiled java method case" at the beginning of the loop. 2569 continue; 2570 } 2571 } 2572 } 2573 #ifdef ASSERT 2574 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace 2575 assert(st.method() == method && st.bci() == bci, "Wrong stack trace"); 2576 st.next(); 2577 } 2578 #endif 2579 2580 // the format of the stacktrace will be: 2581 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2582 // - 0 or more <init> methods for the exception class (skipped) 2583 // - rest of the stack 2584 2585 if (!skip_fillInStackTrace_check) { 2586 if (method->name() == vmSymbols::fillInStackTrace_name() && 2587 throwable->is_a(method->method_holder())) { 2588 continue; 2589 } 2590 else { 2591 skip_fillInStackTrace_check = true; // gone past them all 2592 } 2593 } 2594 if (!skip_throwableInit_check) { 2595 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2596 2597 // skip <init> methods of the exception class and superclasses 2598 // This is similar to classic VM. 2599 if (method->name() == vmSymbols::object_initializer_name() && 2600 throwable->is_a(method->method_holder())) { 2601 continue; 2602 } else { 2603 // there are none or we've seen them all - either way stop checking 2604 skip_throwableInit_check = true; 2605 } 2606 } 2607 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) { 2608 if (skip_hidden) { 2609 if (total_count == 0) { 2610 // The top frame will be hidden from the stack trace. 2611 bt.set_has_hidden_top_frame(); 2612 } 2613 continue; 2614 } 2615 } 2616 2617 bt.push(method, bci, CHECK); 2618 total_count++; 2619 } 2620 2621 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2622 2623 // Put completed stack trace into throwable object 2624 set_backtrace(throwable(), bt.backtrace()); 2625 set_depth(throwable(), total_count); 2626 } 2627 2628 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2629 // No-op if stack trace is disabled 2630 if (!StackTraceInThrowable) { 2631 return; 2632 } 2633 2634 // Disable stack traces for some preallocated out of memory errors 2635 if (!Universe::should_fill_in_stack_trace(throwable)) { 2636 return; 2637 } 2638 2639 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2640 PreserveExceptionMark pm(THREAD); 2641 2642 fill_in_stack_trace(throwable, method, THREAD); 2643 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the 2644 // original exception via the PreserveExceptionMark destructor. 2645 CLEAR_PENDING_EXCEPTION; 2646 } 2647 2648 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2649 // Allocate stack trace - backtrace is created but not filled in 2650 2651 // No-op if stack trace is disabled 2652 if (!StackTraceInThrowable) return; 2653 BacktraceBuilder bt(CHECK); // creates a backtrace 2654 set_backtrace(throwable(), bt.backtrace()); 2655 } 2656 2657 2658 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2659 // Fill in stack trace into preallocated backtrace (no GC) 2660 2661 // No-op if stack trace is disabled 2662 if (!StackTraceInThrowable) return; 2663 2664 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check"); 2665 2666 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2667 2668 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2669 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2670 2671 ResourceMark rm(THREAD); 2672 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */); 2673 2674 BacktraceBuilder bt(THREAD, backtrace); 2675 2676 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2677 // methods as preallocated errors aren't created by "java" code. 2678 2679 // fill in as much stack trace as possible 2680 int chunk_count = 0; 2681 for (;!st.at_end(); st.next()) { 2682 bt.push(st.method(), st.bci(), CHECK); 2683 chunk_count++; 2684 2685 // Bail-out for deep stacks 2686 if (chunk_count >= trace_chunk_size) break; 2687 } 2688 set_depth(throwable(), chunk_count); 2689 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2690 2691 // We support the Throwable immutability protocol defined for Java 7. 2692 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2693 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized"); 2694 } 2695 2696 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace, 2697 objArrayHandle stack_trace_array_h, TRAPS) { 2698 2699 if (backtrace.is_null() || stack_trace_array_h.is_null()) { 2700 THROW(vmSymbols::java_lang_NullPointerException()); 2701 } 2702 2703 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2704 2705 if (stack_trace_array_h->length() != depth) { 2706 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2707 } 2708 2709 objArrayHandle result(THREAD, objArrayOop(backtrace())); 2710 BacktraceIterator iter(result, THREAD); 2711 2712 int index = 0; 2713 while (iter.repeat()) { 2714 BacktraceElement bte = iter.next(THREAD); 2715 2716 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2717 2718 if (stack_trace_element.is_null()) { 2719 THROW(vmSymbols::java_lang_NullPointerException()); 2720 } 2721 2722 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2723 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2724 2725 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2726 method, 2727 bte._version, 2728 bte._bci, 2729 bte._name, 2730 CHECK); 2731 } 2732 } 2733 2734 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) { 2735 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization 2736 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive 2737 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and 2738 // symbolic stacktrace of 'throwable'. 2739 assert(throwable.not_null(), "shouldn't be"); 2740 2741 // Now create the message from the original exception and thread name. 2742 Symbol* message = java_lang_Throwable::detail_message(throwable()); 2743 ResourceMark rm(current); 2744 stringStream st; 2745 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(), 2746 message == nullptr ? "" : ":"); 2747 if (message == nullptr) { 2748 st.print("[in thread \"%s\"]", current->name()); 2749 } else { 2750 st.print("%s [in thread \"%s\"]", message->as_C_string(), current->name()); 2751 } 2752 2753 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError(); 2754 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string()); 2755 // If new_exception returns a different exception while creating the exception, 2756 // abandon the attempt to save the initialization error and return null. 2757 if (init_error->klass()->name() != exception_name) { 2758 log_info(class, init)("Exception thrown while saving initialization exception %s", 2759 init_error->klass()->external_name()); 2760 return Handle(); 2761 } 2762 2763 // Call to java to fill in the stack trace and clear declaringClassObject to 2764 // not keep classes alive in the stack trace. 2765 // call this: public StackTraceElement[] getStackTrace() 2766 JavaValue result(T_ARRAY); 2767 JavaCalls::call_virtual(&result, throwable, 2768 vmClasses::Throwable_klass(), 2769 vmSymbols::getStackTrace_name(), 2770 vmSymbols::getStackTrace_signature(), 2771 current); 2772 if (!current->has_pending_exception()){ 2773 Handle stack_trace(current, result.get_oop()); 2774 assert(stack_trace->is_objArray(), "Should be an array"); 2775 java_lang_Throwable::set_stacktrace(init_error(), stack_trace()); 2776 // Clear backtrace because the stacktrace should be used instead. 2777 set_backtrace(init_error(), nullptr); 2778 } else { 2779 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s", 2780 init_error->klass()->external_name()); 2781 current->clear_pending_exception(); 2782 } 2783 2784 return init_error; 2785 } 2786 2787 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) { 2788 JavaThread* current = JavaThread::current(); 2789 objArrayHandle result(current, objArrayOop(backtrace(throwable))); 2790 BacktraceIterator iter(result, current); 2791 // No backtrace available. 2792 if (!iter.repeat()) return false; 2793 2794 // If the exception happened in a frame that has been hidden, i.e., 2795 // omitted from the back trace, we can not compute the message. 2796 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset); 2797 if (hidden != nullptr) { 2798 return false; 2799 } 2800 2801 // Get first backtrace element. 2802 BacktraceElement bte = iter.next(current); 2803 2804 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2805 assert(holder != nullptr, "first element should be non-null"); 2806 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version); 2807 2808 // Original version is no longer available. 2809 if (m == nullptr || !version_matches(m, bte._version)) { 2810 return false; 2811 } 2812 2813 *method = m; 2814 *bci = bte._bci; 2815 return true; 2816 } 2817 2818 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2819 // Allocate java.lang.StackTraceElement instance 2820 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 2821 assert(k != nullptr, "must be loaded in 1.4+"); 2822 if (k->should_be_initialized()) { 2823 k->initialize(CHECK_NULL); 2824 } 2825 2826 Handle element = k->allocate_instance_handle(CHECK_NULL); 2827 2828 int version = method->constants()->version(); 2829 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL); 2830 return element(); 2831 } 2832 2833 void java_lang_StackTraceElement::fill_in(Handle element, 2834 InstanceKlass* holder, const methodHandle& method, 2835 int version, int bci, Symbol* name, TRAPS) { 2836 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check"); 2837 2838 ResourceMark rm(THREAD); 2839 HandleMark hm(THREAD); 2840 2841 // Fill in class name 2842 Handle java_class(THREAD, holder->java_mirror()); 2843 oop classname = java_lang_Class::name(java_class, CHECK); 2844 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2845 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class()); 2846 2847 oop loader = holder->class_loader(); 2848 if (loader != nullptr) { 2849 oop loader_name = java_lang_ClassLoader::name(loader); 2850 if (loader_name != nullptr) 2851 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2852 } 2853 2854 // Fill in method name 2855 oop methodname = StringTable::intern(name, CHECK); 2856 java_lang_StackTraceElement::set_methodName(element(), methodname); 2857 2858 // Fill in module name and version 2859 ModuleEntry* module = holder->module(); 2860 if (module->is_named()) { 2861 oop module_name = StringTable::intern(module->name(), CHECK); 2862 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2863 oop module_version; 2864 if (module->version() != nullptr) { 2865 module_version = StringTable::intern(module->version(), CHECK); 2866 } else { 2867 module_version = nullptr; 2868 } 2869 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2870 } 2871 2872 if (method() == nullptr || !version_matches(method(), version)) { 2873 // The method was redefined, accurate line number information isn't available 2874 java_lang_StackTraceElement::set_fileName(element(), nullptr); 2875 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2876 } else { 2877 Symbol* source; 2878 oop source_file; 2879 int line_number; 2880 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK); 2881 2882 java_lang_StackTraceElement::set_fileName(element(), source_file); 2883 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2884 } 2885 } 2886 2887 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class, 2888 InstanceKlass* holder, 2889 int version, 2890 const methodHandle& method, 2891 int bci, 2892 Symbol*& source, 2893 oop& source_file, 2894 int& line_number, TRAPS) { 2895 // Fill in source file name and line number. 2896 source = Backtrace::get_source_file_name(holder, version); 2897 source_file = java_lang_Class::source_file(java_class()); 2898 if (source != nullptr) { 2899 // Class was not redefined. We can trust its cache if set, 2900 // else we have to initialize it. 2901 if (source_file == nullptr) { 2902 source_file = StringTable::intern(source, CHECK); 2903 java_lang_Class::set_source_file(java_class(), source_file); 2904 } 2905 } else { 2906 // Class was redefined. Dump the cache if it was set. 2907 if (source_file != nullptr) { 2908 source_file = nullptr; 2909 java_lang_Class::set_source_file(java_class(), source_file); 2910 } 2911 } 2912 line_number = Backtrace::get_line_number(method(), bci); 2913 } 2914 2915 #if INCLUDE_JVMCI 2916 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci, 2917 Symbol*& filename, int& line_number, TRAPS) { 2918 ResourceMark rm(THREAD); 2919 HandleMark hm(THREAD); 2920 2921 filename = nullptr; 2922 line_number = -1; 2923 2924 oop source_file; 2925 int version = method->constants()->version(); 2926 InstanceKlass* holder = method->method_holder(); 2927 Handle java_class(THREAD, holder->java_mirror()); 2928 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK); 2929 } 2930 #endif // INCLUDE_JVMCI 2931 2932 // java_lang_StackFrameInfo 2933 2934 int java_lang_StackFrameInfo::_memberName_offset; 2935 int java_lang_StackFrameInfo::_bci_offset; 2936 int java_lang_StackFrameInfo::_version_offset; 2937 int java_lang_StackFrameInfo::_contScope_offset; 2938 2939 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 2940 macro(_memberName_offset, k, "memberName", object_signature, false); \ 2941 macro(_bci_offset, k, "bci", int_signature, false); \ 2942 macro(_contScope_offset, k, "contScope", continuationscope_signature, false) 2943 2944 void java_lang_StackFrameInfo::compute_offsets() { 2945 InstanceKlass* k = vmClasses::StackFrameInfo_klass(); 2946 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2947 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2948 } 2949 2950 #if INCLUDE_CDS 2951 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) { 2952 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2953 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 2954 } 2955 #endif 2956 2957 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 2958 HandleMark hm(THREAD); 2959 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 2960 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 2961 // we should expand MemberName::name when Throwable uses StackTrace 2962 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 2963 return method; 2964 } 2965 2966 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) { 2967 // set Method* or mid/cpref 2968 HandleMark hm(THREAD); 2969 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 2970 Handle cont_h (THREAD, cont); 2971 InstanceKlass* ik = method->method_holder(); 2972 CallInfo info(method(), ik, CHECK); 2973 MethodHandles::init_method_MemberName(mname, info); 2974 // set bci 2975 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 2976 // method may be redefined; store the version 2977 int version = method->constants()->version(); 2978 assert((jushort)version == version, "version should be short"); 2979 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 2980 2981 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr; 2982 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope); 2983 } 2984 2985 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 2986 ResourceMark rm(THREAD); 2987 HandleMark hm(THREAD); 2988 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset)); 2989 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname())); 2990 InstanceKlass* holder = InstanceKlass::cast(clazz); 2991 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 2992 2993 short version = stackFrame->short_field(_version_offset); 2994 int bci = stackFrame->int_field(_bci_offset); 2995 Symbol* name = method->name(); 2996 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK); 2997 } 2998 2999 void java_lang_StackFrameInfo::set_version(oop element, short value) { 3000 element->short_field_put(_version_offset, value); 3001 } 3002 3003 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 3004 assert(value >= 0 && value < max_jushort, "must be a valid bci value"); 3005 element->int_field_put(_bci_offset, value); 3006 } 3007 3008 void java_lang_StackFrameInfo::set_contScope(oop element, oop value) { 3009 element->obj_field_put(_contScope_offset, value); 3010 } 3011 3012 int java_lang_LiveStackFrameInfo::_monitors_offset; 3013 int java_lang_LiveStackFrameInfo::_locals_offset; 3014 int java_lang_LiveStackFrameInfo::_operands_offset; 3015 int java_lang_LiveStackFrameInfo::_mode_offset; 3016 3017 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 3018 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 3019 macro(_locals_offset, k, "locals", object_array_signature, false); \ 3020 macro(_operands_offset, k, "operands", object_array_signature, false); \ 3021 macro(_mode_offset, k, "mode", int_signature, false) 3022 3023 void java_lang_LiveStackFrameInfo::compute_offsets() { 3024 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass(); 3025 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3026 } 3027 3028 #if INCLUDE_CDS 3029 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) { 3030 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3031 } 3032 #endif 3033 3034 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 3035 element->obj_field_put(_monitors_offset, value); 3036 } 3037 3038 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 3039 element->obj_field_put(_locals_offset, value); 3040 } 3041 3042 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 3043 element->obj_field_put(_operands_offset, value); 3044 } 3045 3046 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) { 3047 element->int_field_put(_mode_offset, value); 3048 } 3049 3050 3051 // java_lang_AccessibleObject 3052 3053 int java_lang_reflect_AccessibleObject::_override_offset; 3054 3055 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 3056 macro(_override_offset, k, "override", bool_signature, false) 3057 3058 void java_lang_reflect_AccessibleObject::compute_offsets() { 3059 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass(); 3060 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3061 } 3062 3063 #if INCLUDE_CDS 3064 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) { 3065 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3066 } 3067 #endif 3068 3069 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 3070 return (jboolean) reflect->bool_field(_override_offset); 3071 } 3072 3073 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 3074 reflect->bool_field_put(_override_offset, (int) value); 3075 } 3076 3077 // java_lang_reflect_Method 3078 3079 int java_lang_reflect_Method::_clazz_offset; 3080 int java_lang_reflect_Method::_name_offset; 3081 int java_lang_reflect_Method::_returnType_offset; 3082 int java_lang_reflect_Method::_parameterTypes_offset; 3083 int java_lang_reflect_Method::_exceptionTypes_offset; 3084 int java_lang_reflect_Method::_slot_offset; 3085 int java_lang_reflect_Method::_modifiers_offset; 3086 int java_lang_reflect_Method::_signature_offset; 3087 int java_lang_reflect_Method::_annotations_offset; 3088 int java_lang_reflect_Method::_parameter_annotations_offset; 3089 int java_lang_reflect_Method::_annotation_default_offset; 3090 3091 #define METHOD_FIELDS_DO(macro) \ 3092 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3093 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3094 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 3095 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 3096 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 3097 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3098 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3099 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3100 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 3101 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \ 3102 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false); 3103 3104 void java_lang_reflect_Method::compute_offsets() { 3105 InstanceKlass* k = vmClasses::reflect_Method_klass(); 3106 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3107 } 3108 3109 #if INCLUDE_CDS 3110 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) { 3111 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3112 } 3113 #endif 3114 3115 Handle java_lang_reflect_Method::create(TRAPS) { 3116 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3117 Klass* klass = vmClasses::reflect_Method_klass(); 3118 // This class is eagerly initialized during VM initialization, since we keep a reference 3119 // to one of the methods 3120 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 3121 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 3122 } 3123 3124 oop java_lang_reflect_Method::clazz(oop reflect) { 3125 return reflect->obj_field(_clazz_offset); 3126 } 3127 3128 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 3129 reflect->obj_field_put(_clazz_offset, value); 3130 } 3131 3132 int java_lang_reflect_Method::slot(oop reflect) { 3133 return reflect->int_field(_slot_offset); 3134 } 3135 3136 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 3137 reflect->int_field_put(_slot_offset, value); 3138 } 3139 3140 void java_lang_reflect_Method::set_name(oop method, oop value) { 3141 method->obj_field_put(_name_offset, value); 3142 } 3143 3144 oop java_lang_reflect_Method::return_type(oop method) { 3145 return method->obj_field(_returnType_offset); 3146 } 3147 3148 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 3149 method->obj_field_put(_returnType_offset, value); 3150 } 3151 3152 oop java_lang_reflect_Method::parameter_types(oop method) { 3153 return method->obj_field(_parameterTypes_offset); 3154 } 3155 3156 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 3157 method->obj_field_put(_parameterTypes_offset, value); 3158 } 3159 3160 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 3161 method->obj_field_put(_exceptionTypes_offset, value); 3162 } 3163 3164 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 3165 method->int_field_put(_modifiers_offset, value); 3166 } 3167 3168 void java_lang_reflect_Method::set_signature(oop method, oop value) { 3169 method->obj_field_put(_signature_offset, value); 3170 } 3171 3172 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 3173 method->obj_field_put(_annotations_offset, value); 3174 } 3175 3176 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 3177 method->obj_field_put(_parameter_annotations_offset, value); 3178 } 3179 3180 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 3181 method->obj_field_put(_annotation_default_offset, value); 3182 } 3183 3184 int java_lang_reflect_Constructor::_clazz_offset; 3185 int java_lang_reflect_Constructor::_parameterTypes_offset; 3186 int java_lang_reflect_Constructor::_exceptionTypes_offset; 3187 int java_lang_reflect_Constructor::_slot_offset; 3188 int java_lang_reflect_Constructor::_modifiers_offset; 3189 int java_lang_reflect_Constructor::_signature_offset; 3190 int java_lang_reflect_Constructor::_annotations_offset; 3191 int java_lang_reflect_Constructor::_parameter_annotations_offset; 3192 3193 #define CONSTRUCTOR_FIELDS_DO(macro) \ 3194 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3195 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 3196 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 3197 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3198 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3199 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3200 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 3201 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); 3202 3203 void java_lang_reflect_Constructor::compute_offsets() { 3204 InstanceKlass* k = vmClasses::reflect_Constructor_klass(); 3205 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3206 } 3207 3208 #if INCLUDE_CDS 3209 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) { 3210 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3211 } 3212 #endif 3213 3214 Handle java_lang_reflect_Constructor::create(TRAPS) { 3215 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3216 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 3217 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3218 InstanceKlass* ik = InstanceKlass::cast(k); 3219 // Ensure it is initialized 3220 ik->initialize(CHECK_NH); 3221 return ik->allocate_instance_handle(THREAD); 3222 } 3223 3224 oop java_lang_reflect_Constructor::clazz(oop reflect) { 3225 return reflect->obj_field(_clazz_offset); 3226 } 3227 3228 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 3229 reflect->obj_field_put(_clazz_offset, value); 3230 } 3231 3232 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 3233 return constructor->obj_field(_parameterTypes_offset); 3234 } 3235 3236 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 3237 constructor->obj_field_put(_parameterTypes_offset, value); 3238 } 3239 3240 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 3241 constructor->obj_field_put(_exceptionTypes_offset, value); 3242 } 3243 3244 int java_lang_reflect_Constructor::slot(oop reflect) { 3245 return reflect->int_field(_slot_offset); 3246 } 3247 3248 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 3249 reflect->int_field_put(_slot_offset, value); 3250 } 3251 3252 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 3253 constructor->int_field_put(_modifiers_offset, value); 3254 } 3255 3256 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 3257 constructor->obj_field_put(_signature_offset, value); 3258 } 3259 3260 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 3261 constructor->obj_field_put(_annotations_offset, value); 3262 } 3263 3264 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 3265 method->obj_field_put(_parameter_annotations_offset, value); 3266 } 3267 3268 int java_lang_reflect_Field::_clazz_offset; 3269 int java_lang_reflect_Field::_name_offset; 3270 int java_lang_reflect_Field::_type_offset; 3271 int java_lang_reflect_Field::_slot_offset; 3272 int java_lang_reflect_Field::_modifiers_offset; 3273 int java_lang_reflect_Field::_trusted_final_offset; 3274 int java_lang_reflect_Field::_signature_offset; 3275 int java_lang_reflect_Field::_annotations_offset; 3276 3277 #define FIELD_FIELDS_DO(macro) \ 3278 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3279 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3280 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \ 3281 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3282 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3283 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \ 3284 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3285 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); 3286 3287 void java_lang_reflect_Field::compute_offsets() { 3288 InstanceKlass* k = vmClasses::reflect_Field_klass(); 3289 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3290 } 3291 3292 #if INCLUDE_CDS 3293 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) { 3294 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3295 } 3296 #endif 3297 3298 Handle java_lang_reflect_Field::create(TRAPS) { 3299 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3300 Symbol* name = vmSymbols::java_lang_reflect_Field(); 3301 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3302 InstanceKlass* ik = InstanceKlass::cast(k); 3303 // Ensure it is initialized 3304 ik->initialize(CHECK_NH); 3305 return ik->allocate_instance_handle(THREAD); 3306 } 3307 3308 oop java_lang_reflect_Field::clazz(oop reflect) { 3309 return reflect->obj_field(_clazz_offset); 3310 } 3311 3312 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 3313 reflect->obj_field_put(_clazz_offset, value); 3314 } 3315 3316 oop java_lang_reflect_Field::name(oop field) { 3317 return field->obj_field(_name_offset); 3318 } 3319 3320 void java_lang_reflect_Field::set_name(oop field, oop value) { 3321 field->obj_field_put(_name_offset, value); 3322 } 3323 3324 oop java_lang_reflect_Field::type(oop field) { 3325 return field->obj_field(_type_offset); 3326 } 3327 3328 void java_lang_reflect_Field::set_type(oop field, oop value) { 3329 field->obj_field_put(_type_offset, value); 3330 } 3331 3332 int java_lang_reflect_Field::slot(oop reflect) { 3333 return reflect->int_field(_slot_offset); 3334 } 3335 3336 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 3337 reflect->int_field_put(_slot_offset, value); 3338 } 3339 3340 int java_lang_reflect_Field::modifiers(oop field) { 3341 return field->int_field(_modifiers_offset); 3342 } 3343 3344 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 3345 field->int_field_put(_modifiers_offset, value); 3346 } 3347 3348 void java_lang_reflect_Field::set_trusted_final(oop field) { 3349 field->bool_field_put(_trusted_final_offset, true); 3350 } 3351 3352 void java_lang_reflect_Field::set_signature(oop field, oop value) { 3353 field->obj_field_put(_signature_offset, value); 3354 } 3355 3356 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 3357 field->obj_field_put(_annotations_offset, value); 3358 } 3359 3360 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) { 3361 // Allocate java.lang.reflect.RecordComponent instance 3362 HandleMark hm(THREAD); 3363 InstanceKlass* ik = vmClasses::RecordComponent_klass(); 3364 assert(ik != nullptr, "must be loaded"); 3365 ik->initialize(CHECK_NULL); 3366 3367 Handle element = ik->allocate_instance_handle(CHECK_NULL); 3368 3369 Handle decl_class(THREAD, holder->java_mirror()); 3370 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class()); 3371 3372 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8 3373 oop component_name = StringTable::intern(name, CHECK_NULL); 3374 java_lang_reflect_RecordComponent::set_name(element(), component_name); 3375 3376 Symbol* type = holder->constants()->symbol_at(component->descriptor_index()); 3377 Handle component_type_h = 3378 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL); 3379 java_lang_reflect_RecordComponent::set_type(element(), component_type_h()); 3380 3381 Method* accessor_method = nullptr; 3382 { 3383 // Prepend "()" to type to create the full method signature. 3384 ResourceMark rm(THREAD); 3385 int sig_len = type->utf8_length() + 3; // "()" and null char 3386 char* sig = NEW_RESOURCE_ARRAY(char, sig_len); 3387 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string()); 3388 TempNewSymbol full_sig = SymbolTable::new_symbol(sig); 3389 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find); 3390 } 3391 3392 if (accessor_method != nullptr) { 3393 methodHandle method(THREAD, accessor_method); 3394 oop m = Reflection::new_method(method, false, CHECK_NULL); 3395 java_lang_reflect_RecordComponent::set_accessor(element(), m); 3396 } else { 3397 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr); 3398 } 3399 3400 int sig_index = component->generic_signature_index(); 3401 if (sig_index > 0) { 3402 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8 3403 oop component_sig = StringTable::intern(sig, CHECK_NULL); 3404 java_lang_reflect_RecordComponent::set_signature(element(), component_sig); 3405 } else { 3406 java_lang_reflect_RecordComponent::set_signature(element(), nullptr); 3407 } 3408 3409 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL); 3410 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop); 3411 3412 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL); 3413 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop); 3414 3415 return element(); 3416 } 3417 3418 int reflect_ConstantPool::_oop_offset; 3419 3420 #define CONSTANTPOOL_FIELDS_DO(macro) \ 3421 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 3422 3423 void reflect_ConstantPool::compute_offsets() { 3424 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass(); 3425 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3426 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3427 } 3428 3429 #if INCLUDE_CDS 3430 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) { 3431 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3432 } 3433 #endif 3434 3435 int java_lang_reflect_Parameter::_name_offset; 3436 int java_lang_reflect_Parameter::_modifiers_offset; 3437 int java_lang_reflect_Parameter::_index_offset; 3438 int java_lang_reflect_Parameter::_executable_offset; 3439 3440 #define PARAMETER_FIELDS_DO(macro) \ 3441 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3442 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3443 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3444 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3445 3446 void java_lang_reflect_Parameter::compute_offsets() { 3447 InstanceKlass* k = vmClasses::reflect_Parameter_klass(); 3448 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3449 } 3450 3451 #if INCLUDE_CDS 3452 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) { 3453 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3454 } 3455 #endif 3456 3457 Handle java_lang_reflect_Parameter::create(TRAPS) { 3458 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3459 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3460 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3461 InstanceKlass* ik = InstanceKlass::cast(k); 3462 // Ensure it is initialized 3463 ik->initialize(CHECK_NH); 3464 return ik->allocate_instance_handle(THREAD); 3465 } 3466 3467 oop java_lang_reflect_Parameter::name(oop param) { 3468 return param->obj_field(_name_offset); 3469 } 3470 3471 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3472 param->obj_field_put(_name_offset, value); 3473 } 3474 3475 int java_lang_reflect_Parameter::modifiers(oop param) { 3476 return param->int_field(_modifiers_offset); 3477 } 3478 3479 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3480 param->int_field_put(_modifiers_offset, value); 3481 } 3482 3483 int java_lang_reflect_Parameter::index(oop param) { 3484 return param->int_field(_index_offset); 3485 } 3486 3487 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3488 param->int_field_put(_index_offset, value); 3489 } 3490 3491 oop java_lang_reflect_Parameter::executable(oop param) { 3492 return param->obj_field(_executable_offset); 3493 } 3494 3495 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3496 param->obj_field_put(_executable_offset, value); 3497 } 3498 3499 // java_lang_Module 3500 3501 int java_lang_Module::_loader_offset; 3502 int java_lang_Module::_name_offset; 3503 int java_lang_Module::_module_entry_offset; 3504 3505 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3506 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3507 return JavaCalls::construct_new_instance(vmClasses::Module_klass(), 3508 vmSymbols::java_lang_module_init_signature(), 3509 loader, module_name, CHECK_NH); 3510 } 3511 3512 #define MODULE_FIELDS_DO(macro) \ 3513 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3514 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false) 3515 3516 void java_lang_Module::compute_offsets() { 3517 InstanceKlass* k = vmClasses::Module_klass(); 3518 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3519 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3520 } 3521 3522 #if INCLUDE_CDS 3523 void java_lang_Module::serialize_offsets(SerializeClosure* f) { 3524 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3525 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3526 } 3527 #endif 3528 3529 oop java_lang_Module::loader(oop module) { 3530 return module->obj_field(_loader_offset); 3531 } 3532 3533 void java_lang_Module::set_loader(oop module, oop value) { 3534 module->obj_field_put(_loader_offset, value); 3535 } 3536 3537 oop java_lang_Module::name(oop module) { 3538 return module->obj_field(_name_offset); 3539 } 3540 3541 void java_lang_Module::set_name(oop module, oop value) { 3542 module->obj_field_put(_name_offset, value); 3543 } 3544 3545 ModuleEntry* java_lang_Module::module_entry_raw(oop module) { 3546 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 3547 assert(module != nullptr, "module can't be null"); 3548 assert(oopDesc::is_oop(module), "module must be oop"); 3549 3550 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3551 return module_entry; 3552 } 3553 3554 ModuleEntry* java_lang_Module::module_entry(oop module) { 3555 ModuleEntry* module_entry = module_entry_raw(module); 3556 if (module_entry == nullptr) { 3557 // If the inject field containing the ModuleEntry* is null then return the 3558 // class loader's unnamed module. 3559 oop loader = java_lang_Module::loader(module); 3560 Handle h_loader = Handle(Thread::current(), loader); 3561 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3562 return loader_cld->unnamed_module(); 3563 } 3564 return module_entry; 3565 } 3566 3567 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3568 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 3569 assert(module != nullptr, "module can't be null"); 3570 assert(oopDesc::is_oop(module), "module must be oop"); 3571 module->address_field_put(_module_entry_offset, (address)module_entry); 3572 } 3573 3574 Handle reflect_ConstantPool::create(TRAPS) { 3575 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3576 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass(); 3577 // Ensure it is initialized 3578 k->initialize(CHECK_NH); 3579 return k->allocate_instance_handle(THREAD); 3580 } 3581 3582 3583 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3584 oop mirror = value->pool_holder()->java_mirror(); 3585 // Save the mirror to get back the constant pool. 3586 reflect->obj_field_put(_oop_offset, mirror); 3587 } 3588 3589 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3590 3591 oop mirror = reflect->obj_field(_oop_offset); 3592 Klass* k = java_lang_Class::as_Klass(mirror); 3593 assert(k->is_instance_klass(), "Must be"); 3594 3595 // Get the constant pool back from the klass. Since class redefinition 3596 // merges the new constant pool into the old, this is essentially the 3597 // same constant pool as the original. If constant pool merging is 3598 // no longer done in the future, this will have to change to save 3599 // the original. 3600 return InstanceKlass::cast(k)->constants(); 3601 } 3602 3603 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 3604 3605 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \ 3606 macro(_base_offset, k, "base", object_signature, false) 3607 3608 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 3609 InstanceKlass* k = vmClasses::reflect_UnsafeStaticFieldAccessorImpl_klass(); 3610 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3611 } 3612 3613 #if INCLUDE_CDS 3614 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) { 3615 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3616 } 3617 #endif 3618 3619 // Support for java_lang_ref_Reference 3620 3621 bool java_lang_ref_Reference::_offsets_initialized; 3622 3623 int java_lang_ref_Reference::_referent_offset; 3624 int java_lang_ref_Reference::_queue_offset; 3625 int java_lang_ref_Reference::_next_offset; 3626 int java_lang_ref_Reference::_discovered_offset; 3627 3628 #define REFERENCE_FIELDS_DO(macro) \ 3629 macro(_referent_offset, k, "referent", object_signature, false); \ 3630 macro(_queue_offset, k, "queue", referencequeue_signature, false); \ 3631 macro(_next_offset, k, "next", reference_signature, false); \ 3632 macro(_discovered_offset, k, "discovered", reference_signature, false); 3633 3634 void java_lang_ref_Reference::compute_offsets() { 3635 if (_offsets_initialized) { 3636 return; 3637 } 3638 _offsets_initialized = true; 3639 InstanceKlass* k = vmClasses::Reference_klass(); 3640 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3641 } 3642 3643 #if INCLUDE_CDS 3644 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) { 3645 f->do_bool(&_offsets_initialized); 3646 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3647 } 3648 #endif 3649 3650 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3651 assert(obj != nullptr, "sanity"); 3652 if (offset != _referent_offset) { 3653 return false; 3654 } 3655 3656 Klass* k = obj->klass(); 3657 if (!k->is_instance_klass()) { 3658 return false; 3659 } 3660 3661 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3662 bool is_reference = ik->reference_type() != REF_NONE; 3663 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity"); 3664 return is_reference; 3665 } 3666 3667 int java_lang_boxing_object::_value_offset; 3668 int java_lang_boxing_object::_long_value_offset; 3669 3670 #define BOXING_FIELDS_DO(macro) \ 3671 macro(_value_offset, integerKlass, "value", int_signature, false); \ 3672 macro(_long_value_offset, longKlass, "value", long_signature, false); 3673 3674 void java_lang_boxing_object::compute_offsets() { 3675 InstanceKlass* integerKlass = vmClasses::Integer_klass(); 3676 InstanceKlass* longKlass = vmClasses::Long_klass(); 3677 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3678 } 3679 3680 #if INCLUDE_CDS 3681 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) { 3682 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3683 } 3684 #endif 3685 3686 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 3687 Klass* k = vmClasses::box_klass(type); 3688 if (k == nullptr) return nullptr; 3689 InstanceKlass* ik = InstanceKlass::cast(k); 3690 if (!ik->is_initialized()) { 3691 ik->initialize(CHECK_NULL); 3692 } 3693 return ik->allocate_instance(THREAD); 3694 } 3695 3696 3697 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 3698 oop box = initialize_and_allocate(type, CHECK_NULL); 3699 if (box == nullptr) return nullptr; 3700 switch (type) { 3701 case T_BOOLEAN: 3702 box->bool_field_put(_value_offset, value->z); 3703 break; 3704 case T_CHAR: 3705 box->char_field_put(_value_offset, value->c); 3706 break; 3707 case T_FLOAT: 3708 box->float_field_put(_value_offset, value->f); 3709 break; 3710 case T_DOUBLE: 3711 box->double_field_put(_long_value_offset, value->d); 3712 break; 3713 case T_BYTE: 3714 box->byte_field_put(_value_offset, value->b); 3715 break; 3716 case T_SHORT: 3717 box->short_field_put(_value_offset, value->s); 3718 break; 3719 case T_INT: 3720 box->int_field_put(_value_offset, value->i); 3721 break; 3722 case T_LONG: 3723 box->long_field_put(_long_value_offset, value->j); 3724 break; 3725 default: 3726 return nullptr; 3727 } 3728 return box; 3729 } 3730 3731 3732 BasicType java_lang_boxing_object::basic_type(oop box) { 3733 if (box == nullptr) return T_ILLEGAL; 3734 BasicType type = vmClasses::box_klass_type(box->klass()); 3735 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 3736 return T_ILLEGAL; 3737 return type; 3738 } 3739 3740 3741 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 3742 BasicType type = vmClasses::box_klass_type(box->klass()); 3743 switch (type) { 3744 case T_BOOLEAN: 3745 value->z = box->bool_field(_value_offset); 3746 break; 3747 case T_CHAR: 3748 value->c = box->char_field(_value_offset); 3749 break; 3750 case T_FLOAT: 3751 value->f = box->float_field(_value_offset); 3752 break; 3753 case T_DOUBLE: 3754 value->d = box->double_field(_long_value_offset); 3755 break; 3756 case T_BYTE: 3757 value->b = box->byte_field(_value_offset); 3758 break; 3759 case T_SHORT: 3760 value->s = box->short_field(_value_offset); 3761 break; 3762 case T_INT: 3763 value->i = box->int_field(_value_offset); 3764 break; 3765 case T_LONG: 3766 value->j = box->long_field(_long_value_offset); 3767 break; 3768 default: 3769 return T_ILLEGAL; 3770 } // end switch 3771 return type; 3772 } 3773 3774 3775 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3776 BasicType type = vmClasses::box_klass_type(box->klass()); 3777 switch (type) { 3778 case T_BOOLEAN: 3779 box->bool_field_put(_value_offset, value->z); 3780 break; 3781 case T_CHAR: 3782 box->char_field_put(_value_offset, value->c); 3783 break; 3784 case T_FLOAT: 3785 box->float_field_put(_value_offset, value->f); 3786 break; 3787 case T_DOUBLE: 3788 box->double_field_put(_long_value_offset, value->d); 3789 break; 3790 case T_BYTE: 3791 box->byte_field_put(_value_offset, value->b); 3792 break; 3793 case T_SHORT: 3794 box->short_field_put(_value_offset, value->s); 3795 break; 3796 case T_INT: 3797 box->int_field_put(_value_offset, value->i); 3798 break; 3799 case T_LONG: 3800 box->long_field_put(_long_value_offset, value->j); 3801 break; 3802 default: 3803 return T_ILLEGAL; 3804 } // end switch 3805 return type; 3806 } 3807 3808 3809 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3810 switch (type) { 3811 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3812 case T_CHAR: st->print("%d", value->c); break; 3813 case T_BYTE: st->print("%d", value->b); break; 3814 case T_SHORT: st->print("%d", value->s); break; 3815 case T_INT: st->print("%d", value->i); break; 3816 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 3817 case T_FLOAT: st->print("%f", value->f); break; 3818 case T_DOUBLE: st->print("%lf", value->d); break; 3819 default: st->print("type %d?", type); break; 3820 } 3821 } 3822 3823 3824 // Support for java_lang_ref_SoftReference 3825 // 3826 3827 int java_lang_ref_SoftReference::_timestamp_offset; 3828 int java_lang_ref_SoftReference::_static_clock_offset; 3829 3830 #define SOFTREFERENCE_FIELDS_DO(macro) \ 3831 macro(_timestamp_offset, k, "timestamp", long_signature, false); \ 3832 macro(_static_clock_offset, k, "clock", long_signature, true) 3833 3834 void java_lang_ref_SoftReference::compute_offsets() { 3835 InstanceKlass* k = vmClasses::SoftReference_klass(); 3836 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3837 } 3838 3839 #if INCLUDE_CDS 3840 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) { 3841 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3842 } 3843 #endif 3844 3845 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3846 return ref->long_field(_timestamp_offset); 3847 } 3848 3849 jlong java_lang_ref_SoftReference::clock() { 3850 InstanceKlass* ik = vmClasses::SoftReference_klass(); 3851 oop base = ik->static_field_base_raw(); 3852 return base->long_field(_static_clock_offset); 3853 } 3854 3855 void java_lang_ref_SoftReference::set_clock(jlong value) { 3856 InstanceKlass* ik = vmClasses::SoftReference_klass(); 3857 oop base = ik->static_field_base_raw(); 3858 base->long_field_put(_static_clock_offset, value); 3859 } 3860 3861 // Support for java_lang_invoke_DirectMethodHandle 3862 3863 int java_lang_invoke_DirectMethodHandle::_member_offset; 3864 3865 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3866 oop member_name = nullptr; 3867 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 3868 "a DirectMethodHandle oop is expected"); 3869 return dmh->obj_field(_member_offset); 3870 } 3871 3872 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 3873 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 3874 3875 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3876 InstanceKlass* k = vmClasses::DirectMethodHandle_klass(); 3877 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3878 } 3879 3880 #if INCLUDE_CDS 3881 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) { 3882 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3883 } 3884 #endif 3885 3886 // Support for java_lang_invoke_MethodHandle 3887 3888 int java_lang_invoke_MethodHandle::_type_offset; 3889 int java_lang_invoke_MethodHandle::_form_offset; 3890 3891 int java_lang_invoke_MemberName::_clazz_offset; 3892 int java_lang_invoke_MemberName::_name_offset; 3893 int java_lang_invoke_MemberName::_type_offset; 3894 int java_lang_invoke_MemberName::_flags_offset; 3895 int java_lang_invoke_MemberName::_method_offset; 3896 int java_lang_invoke_MemberName::_vmindex_offset; 3897 3898 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 3899 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 3900 3901 int java_lang_invoke_LambdaForm::_vmentry_offset; 3902 3903 #define METHODHANDLE_FIELDS_DO(macro) \ 3904 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 3905 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 3906 3907 void java_lang_invoke_MethodHandle::compute_offsets() { 3908 InstanceKlass* k = vmClasses::MethodHandle_klass(); 3909 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3910 } 3911 3912 #if INCLUDE_CDS 3913 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) { 3914 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3915 } 3916 #endif 3917 3918 #define MEMBERNAME_FIELDS_DO(macro) \ 3919 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3920 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3921 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 3922 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 3923 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 3924 3925 void java_lang_invoke_MemberName::compute_offsets() { 3926 InstanceKlass* k = vmClasses::MemberName_klass(); 3927 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3928 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3929 } 3930 3931 #if INCLUDE_CDS 3932 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) { 3933 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3934 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3935 } 3936 #endif 3937 3938 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 3939 InstanceKlass* k = vmClasses::ResolvedMethodName_klass(); 3940 assert(k != nullptr, "jdk mismatch"); 3941 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3942 } 3943 3944 #if INCLUDE_CDS 3945 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) { 3946 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3947 } 3948 #endif 3949 3950 #define LAMBDAFORM_FIELDS_DO(macro) \ 3951 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 3952 3953 void java_lang_invoke_LambdaForm::compute_offsets() { 3954 InstanceKlass* k = vmClasses::LambdaForm_klass(); 3955 assert (k != nullptr, "jdk mismatch"); 3956 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3957 } 3958 3959 #if INCLUDE_CDS 3960 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) { 3961 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3962 } 3963 #endif 3964 3965 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 3966 return obj != nullptr && is_subclass(obj->klass()); 3967 } 3968 3969 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset; 3970 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset; 3971 3972 #define NEP_FIELDS_DO(macro) \ 3973 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \ 3974 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false); 3975 3976 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) { 3977 return obj != nullptr && is_subclass(obj->klass()); 3978 } 3979 3980 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() { 3981 InstanceKlass* k = vmClasses::NativeEntryPoint_klass(); 3982 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3983 } 3984 3985 #if INCLUDE_CDS 3986 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) { 3987 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3988 } 3989 #endif 3990 3991 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) { 3992 return entry->obj_field(_method_type_offset); 3993 } 3994 3995 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) { 3996 return entry->long_field(_downcall_stub_address_offset); 3997 } 3998 3999 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset; 4000 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset; 4001 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset; 4002 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset; 4003 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset; 4004 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset; 4005 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset; 4006 4007 #define ABIDescriptor_FIELDS_DO(macro) \ 4008 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4009 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4010 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4011 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \ 4012 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \ 4013 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \ 4014 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false); 4015 4016 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) { 4017 return obj != nullptr && is_subclass(obj->klass()); 4018 } 4019 4020 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() { 4021 InstanceKlass* k = vmClasses::ABIDescriptor_klass(); 4022 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4023 } 4024 4025 #if INCLUDE_CDS 4026 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) { 4027 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4028 } 4029 #endif 4030 4031 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) { 4032 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset)); 4033 } 4034 4035 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) { 4036 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset)); 4037 } 4038 4039 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) { 4040 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset)); 4041 } 4042 4043 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) { 4044 return entry->int_field(_stackAlignment_offset); 4045 } 4046 4047 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) { 4048 return entry->int_field(_shadowSpace_offset); 4049 } 4050 4051 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) { 4052 return entry->obj_field(_scratch1_offset); 4053 } 4054 4055 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) { 4056 return entry->obj_field(_scratch2_offset); 4057 } 4058 4059 int jdk_internal_foreign_abi_VMStorage::_type_offset; 4060 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset; 4061 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset; 4062 int jdk_internal_foreign_abi_VMStorage::_debugName_offset; 4063 4064 #define VMStorage_FIELDS_DO(macro) \ 4065 macro(_type_offset, k, "type", byte_signature, false); \ 4066 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \ 4067 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \ 4068 macro(_debugName_offset, k, "debugName", string_signature, false); \ 4069 4070 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) { 4071 return obj != nullptr && is_subclass(obj->klass()); 4072 } 4073 4074 void jdk_internal_foreign_abi_VMStorage::compute_offsets() { 4075 InstanceKlass* k = vmClasses::VMStorage_klass(); 4076 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4077 } 4078 4079 #if INCLUDE_CDS 4080 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) { 4081 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4082 } 4083 #endif 4084 4085 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) { 4086 return entry->byte_field(_type_offset); 4087 } 4088 4089 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) { 4090 return entry->int_field(_indexOrOffset_offset); 4091 } 4092 4093 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) { 4094 return entry->short_field(_segmentMaskOrSize_offset); 4095 } 4096 4097 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) { 4098 return entry->obj_field(_debugName_offset); 4099 } 4100 4101 int jdk_internal_foreign_abi_CallConv::_argRegs_offset; 4102 int jdk_internal_foreign_abi_CallConv::_retRegs_offset; 4103 4104 #define CallConv_FIELDS_DO(macro) \ 4105 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \ 4106 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \ 4107 4108 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) { 4109 return obj != nullptr && is_subclass(obj->klass()); 4110 } 4111 4112 void jdk_internal_foreign_abi_CallConv::compute_offsets() { 4113 InstanceKlass* k = vmClasses::CallConv_klass(); 4114 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4115 } 4116 4117 #if INCLUDE_CDS 4118 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) { 4119 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4120 } 4121 #endif 4122 4123 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) { 4124 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset)); 4125 } 4126 4127 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) { 4128 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset)); 4129 } 4130 4131 oop java_lang_invoke_MethodHandle::type(oop mh) { 4132 return mh->obj_field(_type_offset); 4133 } 4134 4135 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 4136 mh->obj_field_put(_type_offset, mtype); 4137 } 4138 4139 oop java_lang_invoke_MethodHandle::form(oop mh) { 4140 assert(_form_offset != 0, ""); 4141 return mh->obj_field(_form_offset); 4142 } 4143 4144 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 4145 assert(_form_offset != 0, ""); 4146 mh->obj_field_put(_form_offset, lform); 4147 } 4148 4149 /// MemberName accessors 4150 4151 oop java_lang_invoke_MemberName::clazz(oop mname) { 4152 assert(is_instance(mname), "wrong type"); 4153 return mname->obj_field(_clazz_offset); 4154 } 4155 4156 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 4157 assert(is_instance(mname), "wrong type"); 4158 mname->obj_field_put(_clazz_offset, clazz); 4159 } 4160 4161 oop java_lang_invoke_MemberName::name(oop mname) { 4162 assert(is_instance(mname), "wrong type"); 4163 return mname->obj_field(_name_offset); 4164 } 4165 4166 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 4167 assert(is_instance(mname), "wrong type"); 4168 mname->obj_field_put(_name_offset, name); 4169 } 4170 4171 oop java_lang_invoke_MemberName::type(oop mname) { 4172 assert(is_instance(mname), "wrong type"); 4173 return mname->obj_field(_type_offset); 4174 } 4175 4176 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 4177 assert(is_instance(mname), "wrong type"); 4178 mname->obj_field_put(_type_offset, type); 4179 } 4180 4181 int java_lang_invoke_MemberName::flags(oop mname) { 4182 assert(is_instance(mname), "wrong type"); 4183 return mname->int_field(_flags_offset); 4184 } 4185 4186 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 4187 assert(is_instance(mname), "wrong type"); 4188 mname->int_field_put(_flags_offset, flags); 4189 } 4190 4191 4192 // Return vmtarget from ResolvedMethodName method field through indirection 4193 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 4194 assert(is_instance(mname), "wrong type"); 4195 oop method = mname->obj_field(_method_offset); 4196 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method); 4197 } 4198 4199 bool java_lang_invoke_MemberName::is_method(oop mname) { 4200 assert(is_instance(mname), "must be MemberName"); 4201 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 4202 } 4203 4204 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 4205 assert(is_instance(mname), "wrong type"); 4206 mname->obj_field_put(_method_offset, resolved_method); 4207 } 4208 4209 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 4210 assert(is_instance(mname), "wrong type"); 4211 return (intptr_t) mname->address_field(_vmindex_offset); 4212 } 4213 4214 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 4215 assert(is_instance(mname), "wrong type"); 4216 mname->address_field_put(_vmindex_offset, (address) index); 4217 } 4218 4219 4220 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 4221 assert(is_instance(resolved_method), "wrong type"); 4222 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 4223 assert(m->is_method(), "must be"); 4224 return m; 4225 } 4226 4227 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 4228 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 4229 assert(is_instance(resolved_method), "wrong type"); 4230 resolved_method->address_field_put(_vmtarget_offset, (address)m); 4231 } 4232 4233 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) { 4234 assert(is_instance(resolved_method), "wrong type"); 4235 resolved_method->obj_field_put(_vmholder_offset, holder); 4236 } 4237 4238 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 4239 const Method* method = m(); 4240 4241 // lookup ResolvedMethod oop in the table, or create a new one and intern it 4242 oop resolved_method = ResolvedMethodTable::find_method(method); 4243 if (resolved_method != nullptr) { 4244 return resolved_method; 4245 } 4246 4247 InstanceKlass* k = vmClasses::ResolvedMethodName_klass(); 4248 if (!k->is_initialized()) { 4249 k->initialize(CHECK_NULL); 4250 } 4251 4252 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 4253 4254 NoSafepointVerifier nsv; 4255 4256 if (method->is_old()) { 4257 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() : 4258 method->get_new_method(); 4259 } 4260 4261 InstanceKlass* holder = method->method_holder(); 4262 4263 set_vmtarget(new_resolved_method, const_cast<Method*>(method)); 4264 // Add a reference to the loader (actually mirror because hidden classes may not have 4265 // distinct loaders) to ensure the metadata is kept alive. 4266 // This mirror may be different than the one in clazz field. 4267 set_vmholder(new_resolved_method, holder->java_mirror()); 4268 4269 // Set flag in class to indicate this InstanceKlass has entries in the table 4270 // to avoid walking table during redefinition if none of the redefined classes 4271 // have any membernames in the table. 4272 holder->set_has_resolved_methods(); 4273 4274 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method)); 4275 } 4276 4277 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 4278 assert(is_instance(lform), "wrong type"); 4279 return lform->obj_field(_vmentry_offset); 4280 } 4281 4282 4283 // Support for java_lang_invoke_MethodType 4284 4285 int java_lang_invoke_MethodType::_rtype_offset; 4286 int java_lang_invoke_MethodType::_ptypes_offset; 4287 4288 #define METHODTYPE_FIELDS_DO(macro) \ 4289 macro(_rtype_offset, k, "rtype", class_signature, false); \ 4290 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 4291 4292 void java_lang_invoke_MethodType::compute_offsets() { 4293 InstanceKlass* k = vmClasses::MethodType_klass(); 4294 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4295 } 4296 4297 #if INCLUDE_CDS 4298 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) { 4299 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4300 } 4301 #endif 4302 4303 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 4304 st->print("("); 4305 objArrayOop pts = ptypes(mt); 4306 if (pts != nullptr) { 4307 for (int i = 0, limit = pts->length(); i < limit; i++) { 4308 java_lang_Class::print_signature(pts->obj_at(i), st); 4309 } 4310 } else { 4311 st->print("null"); 4312 } 4313 st->print(")"); 4314 oop rt = rtype(mt); 4315 if (rt != nullptr) { 4316 java_lang_Class::print_signature(rt, st); 4317 } else { 4318 st->print("null"); 4319 } 4320 } 4321 4322 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) { 4323 ResourceMark rm; 4324 stringStream buffer(128); 4325 print_signature(mt, &buffer); 4326 const char* sigstr = buffer.base(); 4327 int siglen = (int) buffer.size(); 4328 Symbol *name; 4329 if (!intern_if_not_found) { 4330 name = SymbolTable::probe(sigstr, siglen); 4331 } else { 4332 name = SymbolTable::new_symbol(sigstr, siglen); 4333 } 4334 return name; 4335 } 4336 4337 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 4338 if (mt1 == mt2) 4339 return true; 4340 if (rtype(mt1) != rtype(mt2)) 4341 return false; 4342 if (ptype_count(mt1) != ptype_count(mt2)) 4343 return false; 4344 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 4345 if (ptype(mt1, i) != ptype(mt2, i)) 4346 return false; 4347 } 4348 return true; 4349 } 4350 4351 oop java_lang_invoke_MethodType::rtype(oop mt) { 4352 assert(is_instance(mt), "must be a MethodType"); 4353 return mt->obj_field(_rtype_offset); 4354 } 4355 4356 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 4357 assert(is_instance(mt), "must be a MethodType"); 4358 return (objArrayOop) mt->obj_field(_ptypes_offset); 4359 } 4360 4361 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 4362 return ptypes(mt)->obj_at(idx); 4363 } 4364 4365 int java_lang_invoke_MethodType::ptype_count(oop mt) { 4366 return ptypes(mt)->length(); 4367 } 4368 4369 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 4370 objArrayOop pts = ptypes(mt); 4371 int count = pts->length(); 4372 int slots = 0; 4373 for (int i = 0; i < count; i++) { 4374 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 4375 slots += type2size[bt]; 4376 } 4377 return slots; 4378 } 4379 4380 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 4381 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 4382 return type2size[bt]; 4383 } 4384 4385 4386 // Support for java_lang_invoke_CallSite 4387 4388 int java_lang_invoke_CallSite::_target_offset; 4389 int java_lang_invoke_CallSite::_context_offset; 4390 4391 #define CALLSITE_FIELDS_DO(macro) \ 4392 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 4393 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false) 4394 4395 void java_lang_invoke_CallSite::compute_offsets() { 4396 InstanceKlass* k = vmClasses::CallSite_klass(); 4397 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4398 } 4399 4400 #if INCLUDE_CDS 4401 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) { 4402 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4403 } 4404 #endif 4405 4406 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) { 4407 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 4408 4409 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset); 4410 return dep_oop; 4411 } 4412 4413 // Support for java_lang_invoke_ConstantCallSite 4414 4415 int java_lang_invoke_ConstantCallSite::_is_frozen_offset; 4416 4417 #define CONSTANTCALLSITE_FIELDS_DO(macro) \ 4418 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false) 4419 4420 void java_lang_invoke_ConstantCallSite::compute_offsets() { 4421 InstanceKlass* k = vmClasses::ConstantCallSite_klass(); 4422 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4423 } 4424 4425 #if INCLUDE_CDS 4426 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) { 4427 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4428 } 4429 #endif 4430 4431 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 4432 4433 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 4434 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset; 4435 4436 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 4437 InstanceKlass* k = vmClasses::Context_klass(); 4438 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4439 } 4440 4441 #if INCLUDE_CDS 4442 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) { 4443 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4444 } 4445 #endif 4446 4447 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 4448 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 4449 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset); 4450 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset); 4451 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr); 4452 return dep_ctx; 4453 } 4454 4455 // Support for java_security_AccessControlContext 4456 4457 int java_security_AccessControlContext::_context_offset; 4458 int java_security_AccessControlContext::_privilegedContext_offset; 4459 int java_security_AccessControlContext::_isPrivileged_offset; 4460 int java_security_AccessControlContext::_isAuthorized_offset; 4461 4462 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \ 4463 macro(_context_offset, k, "context", protectiondomain_signature, false); \ 4464 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \ 4465 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \ 4466 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false) 4467 4468 void java_security_AccessControlContext::compute_offsets() { 4469 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 4470 InstanceKlass* k = vmClasses::AccessControlContext_klass(); 4471 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4472 } 4473 4474 #if INCLUDE_CDS 4475 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) { 4476 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4477 } 4478 #endif 4479 4480 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 4481 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 4482 assert(_isAuthorized_offset != 0, "offsets should have been initialized"); 4483 // Ensure klass is initialized 4484 vmClasses::AccessControlContext_klass()->initialize(CHECK_NULL); 4485 // Allocate result 4486 oop result = vmClasses::AccessControlContext_klass()->allocate_instance(CHECK_NULL); 4487 // Fill in values 4488 result->obj_field_put(_context_offset, context()); 4489 result->obj_field_put(_privilegedContext_offset, privileged_context()); 4490 result->bool_field_put(_isPrivileged_offset, isPrivileged); 4491 result->bool_field_put(_isAuthorized_offset, true); 4492 return result; 4493 } 4494 4495 4496 // Support for java_lang_ClassLoader 4497 4498 int java_lang_ClassLoader::_loader_data_offset; 4499 int java_lang_ClassLoader::_parallelCapable_offset; 4500 int java_lang_ClassLoader::_name_offset; 4501 int java_lang_ClassLoader::_nameAndId_offset; 4502 int java_lang_ClassLoader::_unnamedModule_offset; 4503 int java_lang_ClassLoader::_parent_offset; 4504 4505 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) { 4506 assert(loader != nullptr, "loader must not be null"); 4507 assert(oopDesc::is_oop(loader), "loader must be oop"); 4508 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset)); 4509 } 4510 4511 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 4512 assert(loader != nullptr, "loader must not be null"); 4513 assert(oopDesc::is_oop(loader), "loader must be oop"); 4514 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset); 4515 } 4516 4517 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) { 4518 assert(loader != nullptr, "loader must not be null"); 4519 assert(oopDesc::is_oop(loader), "loader must be oop"); 4520 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data); 4521 } 4522 4523 #define CLASSLOADER_FIELDS_DO(macro) \ 4524 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 4525 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 4526 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \ 4527 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 4528 macro(_parent_offset, k1, "parent", classloader_signature, false) 4529 4530 void java_lang_ClassLoader::compute_offsets() { 4531 InstanceKlass* k1 = vmClasses::ClassLoader_klass(); 4532 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4533 4534 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4535 } 4536 4537 #if INCLUDE_CDS 4538 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) { 4539 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4540 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4541 } 4542 #endif 4543 4544 oop java_lang_ClassLoader::parent(oop loader) { 4545 assert(is_instance(loader), "loader must be oop"); 4546 return loader->obj_field(_parent_offset); 4547 } 4548 4549 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) { 4550 assert(is_instance(loader), "loader must be oop"); 4551 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset); 4552 } 4553 4554 // Returns the name field of this class loader. If the name field has not 4555 // been set, null will be returned. 4556 oop java_lang_ClassLoader::name(oop loader) { 4557 assert(is_instance(loader), "loader must be oop"); 4558 return loader->obj_field(_name_offset); 4559 } 4560 4561 // Returns the nameAndId field of this class loader. The format is 4562 // as follows: 4563 // If the defining loader has a name explicitly set then '<loader-name>' @<id> 4564 // If the defining loader has no name then <qualified-class-name> @<id> 4565 // If built-in loader, then omit '@<id>' as there is only one instance. 4566 // Use ClassLoader::loader_name_id() to obtain this String as a char*. 4567 oop java_lang_ClassLoader::nameAndId(oop loader) { 4568 assert(is_instance(loader), "loader must be oop"); 4569 return loader->obj_field(_nameAndId_offset); 4570 } 4571 4572 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 4573 assert(is_instance(loader), "loader must be oop"); 4574 assert(cl == nullptr || is_instance(cl), "cl argument must be oop"); 4575 oop acl = loader; 4576 debug_only(jint loop_count = 0); 4577 // This loop taken verbatim from ClassLoader.java: 4578 do { 4579 acl = parent(acl); 4580 if (cl == acl) { 4581 return true; 4582 } 4583 assert(++loop_count > 0, "loop_count overflow"); 4584 } while (acl != nullptr); 4585 return false; 4586 } 4587 4588 bool java_lang_ClassLoader::is_instance(oop obj) { 4589 return obj != nullptr && is_subclass(obj->klass()); 4590 } 4591 4592 4593 // For class loader classes, parallelCapable defined 4594 // based on non-null field 4595 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 4596 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 4597 assert(_parallelCapable_offset != 0, "offsets should have been initialized"); 4598 return (class_loader->obj_field(_parallelCapable_offset) != nullptr); 4599 } 4600 4601 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 4602 // Fix for 4474172; see evaluation for more details 4603 loader = non_reflection_class_loader(loader); 4604 4605 oop cl = SystemDictionary::java_system_loader(); 4606 while(cl != nullptr) { 4607 if (cl == loader) return true; 4608 cl = parent(cl); 4609 } 4610 return false; 4611 } 4612 4613 // Return true if this is one of the class loaders associated with 4614 // the generated bytecodes for reflection. 4615 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 4616 if (loader != nullptr) { 4617 Klass* delegating_cl_class = vmClasses::reflect_DelegatingClassLoader_klass(); 4618 // This might be null in non-1.4 JDKs 4619 return (delegating_cl_class != nullptr && loader->is_a(delegating_cl_class)); 4620 } 4621 return false; 4622 } 4623 4624 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 4625 // See whether this is one of the class loaders associated with 4626 // the generated bytecodes for reflection, and if so, "magically" 4627 // delegate to its parent to prevent class loading from occurring 4628 // in places where applications using reflection didn't expect it. 4629 if (is_reflection_class_loader(loader)) { 4630 return parent(loader); 4631 } 4632 return loader; 4633 } 4634 4635 oop java_lang_ClassLoader::unnamedModule(oop loader) { 4636 assert(is_instance(loader), "loader must be oop"); 4637 return loader->obj_field(_unnamedModule_offset); 4638 } 4639 4640 // Support for java_lang_System 4641 // 4642 4643 int java_lang_System::_static_in_offset; 4644 int java_lang_System::_static_out_offset; 4645 int java_lang_System::_static_err_offset; 4646 int java_lang_System::_static_security_offset; 4647 int java_lang_System::_static_allow_security_offset; 4648 int java_lang_System::_static_never_offset; 4649 4650 #define SYSTEM_FIELDS_DO(macro) \ 4651 macro(_static_in_offset, k, "in", input_stream_signature, true); \ 4652 macro(_static_out_offset, k, "out", print_stream_signature, true); \ 4653 macro(_static_err_offset, k, "err", print_stream_signature, true); \ 4654 macro(_static_security_offset, k, "security", security_manager_signature, true); \ 4655 macro(_static_allow_security_offset, k, "allowSecurityManager", int_signature, true); \ 4656 macro(_static_never_offset, k, "NEVER", int_signature, true) 4657 4658 void java_lang_System::compute_offsets() { 4659 InstanceKlass* k = vmClasses::System_klass(); 4660 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4661 } 4662 4663 // This field tells us that a security manager can never be installed so we 4664 // can completely skip populating the ProtectionDomainCacheTable. 4665 bool java_lang_System::allow_security_manager() { 4666 static int initialized = false; 4667 static bool allowed = true; // default 4668 if (!initialized) { 4669 oop base = vmClasses::System_klass()->static_field_base_raw(); 4670 int never = base->int_field(_static_never_offset); 4671 allowed = (base->int_field(_static_allow_security_offset) != never); 4672 initialized = true; 4673 } 4674 return allowed; 4675 } 4676 4677 // This field tells us that a security manager is installed. 4678 bool java_lang_System::has_security_manager() { 4679 oop base = vmClasses::System_klass()->static_field_base_raw(); 4680 return base->obj_field(_static_security_offset) != nullptr; 4681 } 4682 4683 #if INCLUDE_CDS 4684 void java_lang_System::serialize_offsets(SerializeClosure* f) { 4685 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4686 } 4687 #endif 4688 4689 // Support for jdk_internal_misc_UnsafeConstants 4690 // 4691 class UnsafeConstantsFixup : public FieldClosure { 4692 private: 4693 int _address_size; 4694 int _page_size; 4695 bool _big_endian; 4696 bool _use_unaligned_access; 4697 int _data_cache_line_flush_size; 4698 public: 4699 UnsafeConstantsFixup() { 4700 // round up values for all static final fields 4701 _address_size = sizeof(void*); 4702 _page_size = (int)os::vm_page_size(); 4703 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true); 4704 _use_unaligned_access = UseUnalignedAccesses; 4705 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size(); 4706 } 4707 4708 void do_field(fieldDescriptor* fd) { 4709 oop mirror = fd->field_holder()->java_mirror(); 4710 assert(mirror != nullptr, "UnsafeConstants must have mirror already"); 4711 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants"); 4712 assert(fd->is_final(), "fields of UnsafeConstants must be final"); 4713 assert(fd->is_static(), "fields of UnsafeConstants must be static"); 4714 if (fd->name() == vmSymbols::address_size_name()) { 4715 mirror->int_field_put(fd->offset(), _address_size); 4716 } else if (fd->name() == vmSymbols::page_size_name()) { 4717 mirror->int_field_put(fd->offset(), _page_size); 4718 } else if (fd->name() == vmSymbols::big_endian_name()) { 4719 mirror->bool_field_put(fd->offset(), _big_endian); 4720 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) { 4721 mirror->bool_field_put(fd->offset(), _use_unaligned_access); 4722 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) { 4723 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size); 4724 } else { 4725 assert(false, "unexpected UnsafeConstants field"); 4726 } 4727 } 4728 }; 4729 4730 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() { 4731 UnsafeConstantsFixup fixup; 4732 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup); 4733 } 4734 4735 4736 // java_lang_StackTraceElement 4737 4738 int java_lang_StackTraceElement::_methodName_offset; 4739 int java_lang_StackTraceElement::_fileName_offset; 4740 int java_lang_StackTraceElement::_lineNumber_offset; 4741 int java_lang_StackTraceElement::_moduleName_offset; 4742 int java_lang_StackTraceElement::_moduleVersion_offset; 4743 int java_lang_StackTraceElement::_classLoaderName_offset; 4744 int java_lang_StackTraceElement::_declaringClass_offset; 4745 int java_lang_StackTraceElement::_declaringClassObject_offset; 4746 4747 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4748 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4749 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4750 macro(_moduleName_offset, k, "moduleName", string_signature, false); \ 4751 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4752 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \ 4753 macro(_methodName_offset, k, "methodName", string_signature, false); \ 4754 macro(_fileName_offset, k, "fileName", string_signature, false); \ 4755 macro(_lineNumber_offset, k, "lineNumber", int_signature, false) 4756 4757 // Support for java_lang_StackTraceElement 4758 void java_lang_StackTraceElement::compute_offsets() { 4759 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 4760 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4761 } 4762 4763 #if INCLUDE_CDS 4764 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) { 4765 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4766 } 4767 #endif 4768 4769 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 4770 element->obj_field_put(_fileName_offset, value); 4771 } 4772 4773 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 4774 element->obj_field_put(_declaringClass_offset, value); 4775 } 4776 4777 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 4778 element->obj_field_put(_methodName_offset, value); 4779 } 4780 4781 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 4782 element->int_field_put(_lineNumber_offset, value); 4783 } 4784 4785 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 4786 element->obj_field_put(_moduleName_offset, value); 4787 } 4788 4789 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 4790 element->obj_field_put(_moduleVersion_offset, value); 4791 } 4792 4793 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 4794 element->obj_field_put(_classLoaderName_offset, value); 4795 } 4796 4797 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 4798 element->obj_field_put(_declaringClassObject_offset, value); 4799 } 4800 4801 4802 // java_lang_AssertionStatusDirectives 4803 4804 int java_lang_AssertionStatusDirectives::_classes_offset; 4805 int java_lang_AssertionStatusDirectives::_classEnabled_offset; 4806 int java_lang_AssertionStatusDirectives::_packages_offset; 4807 int java_lang_AssertionStatusDirectives::_packageEnabled_offset; 4808 int java_lang_AssertionStatusDirectives::_deflt_offset; 4809 4810 // Support for java Assertions - java_lang_AssertionStatusDirectives. 4811 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 4812 macro(_classes_offset, k, "classes", string_array_signature, false); \ 4813 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 4814 macro(_packages_offset, k, "packages", string_array_signature, false); \ 4815 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 4816 macro(_deflt_offset, k, "deflt", bool_signature, false) 4817 4818 void java_lang_AssertionStatusDirectives::compute_offsets() { 4819 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass(); 4820 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4821 } 4822 4823 #if INCLUDE_CDS 4824 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) { 4825 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4826 } 4827 #endif 4828 4829 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 4830 o->obj_field_put(_classes_offset, val); 4831 } 4832 4833 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 4834 o->obj_field_put(_classEnabled_offset, val); 4835 } 4836 4837 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 4838 o->obj_field_put(_packages_offset, val); 4839 } 4840 4841 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 4842 o->obj_field_put(_packageEnabled_offset, val); 4843 } 4844 4845 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 4846 o->bool_field_put(_deflt_offset, val); 4847 } 4848 4849 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset; 4850 4851 #define AOS_FIELDS_DO(macro) \ 4852 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false) 4853 4854 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() { 4855 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass(); 4856 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4857 } 4858 4859 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 4860 assert(_owner_offset != 0, "Must be initialized"); 4861 return obj->obj_field(_owner_offset); 4862 } 4863 4864 #if INCLUDE_CDS 4865 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) { 4866 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4867 } 4868 #endif 4869 4870 int vector_VectorPayload::_payload_offset; 4871 4872 #define VECTORPAYLOAD_FIELDS_DO(macro) \ 4873 macro(_payload_offset, k, "payload", object_signature, false) 4874 4875 void vector_VectorPayload::compute_offsets() { 4876 InstanceKlass* k = vmClasses::vector_VectorPayload_klass(); 4877 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4878 } 4879 4880 #if INCLUDE_CDS 4881 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) { 4882 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4883 } 4884 #endif 4885 4886 void vector_VectorPayload::set_payload(oop o, oop val) { 4887 o->obj_field_put(_payload_offset, val); 4888 } 4889 4890 bool vector_VectorPayload::is_instance(oop obj) { 4891 return obj != nullptr && is_subclass(obj->klass()); 4892 } 4893 4894 int java_lang_Integer_IntegerCache::_static_cache_offset; 4895 int java_lang_Long_LongCache::_static_cache_offset; 4896 int java_lang_Character_CharacterCache::_static_cache_offset; 4897 int java_lang_Short_ShortCache::_static_cache_offset; 4898 int java_lang_Byte_ByteCache::_static_cache_offset; 4899 4900 #define INTEGER_CACHE_FIELDS_DO(macro) \ 4901 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true) 4902 4903 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) { 4904 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 4905 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4906 } 4907 4908 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) { 4909 oop base = ik->static_field_base_raw(); 4910 return objArrayOop(base->obj_field(_static_cache_offset)); 4911 } 4912 4913 Symbol* java_lang_Integer_IntegerCache::symbol() { 4914 return vmSymbols::java_lang_Integer_IntegerCache(); 4915 } 4916 4917 #if INCLUDE_CDS 4918 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) { 4919 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4920 } 4921 #endif 4922 #undef INTEGER_CACHE_FIELDS_DO 4923 4924 jint java_lang_Integer::value(oop obj) { 4925 jvalue v; 4926 java_lang_boxing_object::get_value(obj, &v); 4927 return v.i; 4928 } 4929 4930 #define LONG_CACHE_FIELDS_DO(macro) \ 4931 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true) 4932 4933 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) { 4934 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 4935 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4936 } 4937 4938 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) { 4939 oop base = ik->static_field_base_raw(); 4940 return objArrayOop(base->obj_field(_static_cache_offset)); 4941 } 4942 4943 Symbol* java_lang_Long_LongCache::symbol() { 4944 return vmSymbols::java_lang_Long_LongCache(); 4945 } 4946 4947 #if INCLUDE_CDS 4948 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) { 4949 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4950 } 4951 #endif 4952 #undef LONG_CACHE_FIELDS_DO 4953 4954 jlong java_lang_Long::value(oop obj) { 4955 jvalue v; 4956 java_lang_boxing_object::get_value(obj, &v); 4957 return v.j; 4958 } 4959 4960 #define CHARACTER_CACHE_FIELDS_DO(macro) \ 4961 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true) 4962 4963 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) { 4964 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 4965 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4966 } 4967 4968 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) { 4969 oop base = ik->static_field_base_raw(); 4970 return objArrayOop(base->obj_field(_static_cache_offset)); 4971 } 4972 4973 Symbol* java_lang_Character_CharacterCache::symbol() { 4974 return vmSymbols::java_lang_Character_CharacterCache(); 4975 } 4976 4977 #if INCLUDE_CDS 4978 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) { 4979 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4980 } 4981 #endif 4982 #undef CHARACTER_CACHE_FIELDS_DO 4983 4984 jchar java_lang_Character::value(oop obj) { 4985 jvalue v; 4986 java_lang_boxing_object::get_value(obj, &v); 4987 return v.c; 4988 } 4989 4990 #define SHORT_CACHE_FIELDS_DO(macro) \ 4991 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true) 4992 4993 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) { 4994 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 4995 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4996 } 4997 4998 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) { 4999 oop base = ik->static_field_base_raw(); 5000 return objArrayOop(base->obj_field(_static_cache_offset)); 5001 } 5002 5003 Symbol* java_lang_Short_ShortCache::symbol() { 5004 return vmSymbols::java_lang_Short_ShortCache(); 5005 } 5006 5007 #if INCLUDE_CDS 5008 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) { 5009 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5010 } 5011 #endif 5012 #undef SHORT_CACHE_FIELDS_DO 5013 5014 jshort java_lang_Short::value(oop obj) { 5015 jvalue v; 5016 java_lang_boxing_object::get_value(obj, &v); 5017 return v.s; 5018 } 5019 5020 #define BYTE_CACHE_FIELDS_DO(macro) \ 5021 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true) 5022 5023 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) { 5024 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5025 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5026 } 5027 5028 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) { 5029 oop base = ik->static_field_base_raw(); 5030 return objArrayOop(base->obj_field(_static_cache_offset)); 5031 } 5032 5033 Symbol* java_lang_Byte_ByteCache::symbol() { 5034 return vmSymbols::java_lang_Byte_ByteCache(); 5035 } 5036 5037 #if INCLUDE_CDS 5038 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) { 5039 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5040 } 5041 #endif 5042 #undef BYTE_CACHE_FIELDS_DO 5043 5044 jbyte java_lang_Byte::value(oop obj) { 5045 jvalue v; 5046 java_lang_boxing_object::get_value(obj, &v); 5047 return v.b; 5048 } 5049 5050 int java_lang_Boolean::_static_TRUE_offset; 5051 int java_lang_Boolean::_static_FALSE_offset; 5052 5053 #define BOOLEAN_FIELDS_DO(macro) \ 5054 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \ 5055 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true) 5056 5057 5058 void java_lang_Boolean::compute_offsets(InstanceKlass *k) { 5059 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5060 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5061 } 5062 5063 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) { 5064 oop base = ik->static_field_base_raw(); 5065 return base->obj_field(_static_TRUE_offset); 5066 } 5067 5068 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) { 5069 oop base = ik->static_field_base_raw(); 5070 return base->obj_field(_static_FALSE_offset); 5071 } 5072 5073 Symbol* java_lang_Boolean::symbol() { 5074 return vmSymbols::java_lang_Boolean(); 5075 } 5076 5077 #if INCLUDE_CDS 5078 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) { 5079 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5080 } 5081 #endif 5082 #undef BOOLEAN_CACHE_FIELDS_DO 5083 5084 jboolean java_lang_Boolean::value(oop obj) { 5085 jvalue v; 5086 java_lang_boxing_object::get_value(obj, &v); 5087 return v.z; 5088 } 5089 5090 // java_lang_reflect_RecordComponent 5091 5092 int java_lang_reflect_RecordComponent::_clazz_offset; 5093 int java_lang_reflect_RecordComponent::_name_offset; 5094 int java_lang_reflect_RecordComponent::_type_offset; 5095 int java_lang_reflect_RecordComponent::_accessor_offset; 5096 int java_lang_reflect_RecordComponent::_signature_offset; 5097 int java_lang_reflect_RecordComponent::_annotations_offset; 5098 int java_lang_reflect_RecordComponent::_typeAnnotations_offset; 5099 5100 #define RECORDCOMPONENT_FIELDS_DO(macro) \ 5101 macro(_clazz_offset, k, "clazz", class_signature, false); \ 5102 macro(_name_offset, k, "name", string_signature, false); \ 5103 macro(_type_offset, k, "type", class_signature, false); \ 5104 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \ 5105 macro(_signature_offset, k, "signature", string_signature, false); \ 5106 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \ 5107 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false); 5108 5109 // Support for java_lang_reflect_RecordComponent 5110 void java_lang_reflect_RecordComponent::compute_offsets() { 5111 InstanceKlass* k = vmClasses::RecordComponent_klass(); 5112 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5113 } 5114 5115 #if INCLUDE_CDS 5116 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) { 5117 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5118 } 5119 #endif 5120 5121 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) { 5122 element->obj_field_put(_clazz_offset, value); 5123 } 5124 5125 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) { 5126 element->obj_field_put(_name_offset, value); 5127 } 5128 5129 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) { 5130 element->obj_field_put(_type_offset, value); 5131 } 5132 5133 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) { 5134 element->obj_field_put(_accessor_offset, value); 5135 } 5136 5137 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) { 5138 element->obj_field_put(_signature_offset, value); 5139 } 5140 5141 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) { 5142 element->obj_field_put(_annotations_offset, value); 5143 } 5144 5145 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) { 5146 element->obj_field_put(_typeAnnotations_offset, value); 5147 } 5148 5149 // java_lang_InternalError 5150 int java_lang_InternalError::_during_unsafe_access_offset; 5151 5152 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) { 5153 internal_error->bool_field_put(_during_unsafe_access_offset, true); 5154 } 5155 5156 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) { 5157 return internal_error->bool_field(_during_unsafe_access_offset); 5158 } 5159 5160 void java_lang_InternalError::compute_offsets() { 5161 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 5162 } 5163 5164 #if INCLUDE_CDS 5165 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) { 5166 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 5167 } 5168 #endif 5169 5170 #define BASIC_JAVA_CLASSES_DO_PART1(f) \ 5171 f(java_lang_Class) \ 5172 f(java_lang_String) \ 5173 f(java_lang_ref_Reference) \ 5174 //end 5175 5176 #define BASIC_JAVA_CLASSES_DO_PART2(f) \ 5177 f(java_lang_System) \ 5178 f(java_lang_ClassLoader) \ 5179 f(java_lang_Throwable) \ 5180 f(java_lang_Thread) \ 5181 f(java_lang_Thread_FieldHolder) \ 5182 f(java_lang_Thread_Constants) \ 5183 f(java_lang_ThreadGroup) \ 5184 f(java_lang_VirtualThread) \ 5185 f(java_lang_InternalError) \ 5186 f(java_lang_AssertionStatusDirectives) \ 5187 f(java_lang_ref_SoftReference) \ 5188 f(java_lang_invoke_MethodHandle) \ 5189 f(java_lang_invoke_DirectMethodHandle) \ 5190 f(java_lang_invoke_MemberName) \ 5191 f(java_lang_invoke_ResolvedMethodName) \ 5192 f(java_lang_invoke_LambdaForm) \ 5193 f(java_lang_invoke_MethodType) \ 5194 f(java_lang_invoke_CallSite) \ 5195 f(java_lang_invoke_ConstantCallSite) \ 5196 f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \ 5197 f(java_security_AccessControlContext) \ 5198 f(java_lang_reflect_AccessibleObject) \ 5199 f(java_lang_reflect_Method) \ 5200 f(java_lang_reflect_Constructor) \ 5201 f(java_lang_reflect_Field) \ 5202 f(java_lang_reflect_RecordComponent) \ 5203 f(reflect_ConstantPool) \ 5204 f(reflect_UnsafeStaticFieldAccessorImpl) \ 5205 f(java_lang_reflect_Parameter) \ 5206 f(java_lang_Module) \ 5207 f(java_lang_StackTraceElement) \ 5208 f(java_lang_StackFrameInfo) \ 5209 f(java_lang_LiveStackFrameInfo) \ 5210 f(jdk_internal_vm_ContinuationScope) \ 5211 f(jdk_internal_vm_Continuation) \ 5212 f(jdk_internal_vm_StackChunk) \ 5213 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \ 5214 f(jdk_internal_foreign_abi_NativeEntryPoint) \ 5215 f(jdk_internal_foreign_abi_ABIDescriptor) \ 5216 f(jdk_internal_foreign_abi_VMStorage) \ 5217 f(jdk_internal_foreign_abi_CallConv) \ 5218 f(jdk_internal_misc_UnsafeConstants) \ 5219 f(java_lang_boxing_object) \ 5220 f(vector_VectorPayload) \ 5221 //end 5222 5223 #define BASIC_JAVA_CLASSES_DO(f) \ 5224 BASIC_JAVA_CLASSES_DO_PART1(f) \ 5225 BASIC_JAVA_CLASSES_DO_PART2(f) 5226 5227 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets(); 5228 5229 // Compute field offsets of all the classes in this file 5230 void JavaClasses::compute_offsets() { 5231 if (UseSharedSpaces) { 5232 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() && 5233 JvmtiExport::has_early_class_hook_env()), 5234 "JavaClasses::compute_offsets() must be called in early JVMTI phase.")); 5235 // None of the classes used by the rest of this function can be replaced by 5236 // JVMTI ClassFileLoadHook. 5237 // We are safe to use the archived offsets, which have already been restored 5238 // by JavaClasses::serialize_offsets, without computing the offsets again. 5239 return; 5240 } 5241 5242 // We have already called the compute_offsets() of the 5243 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and 5244 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all() 5245 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS); 5246 } 5247 5248 #if INCLUDE_CDS 5249 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc); 5250 5251 void JavaClasses::serialize_offsets(SerializeClosure* soc) { 5252 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS); 5253 } 5254 #endif 5255 5256 #if INCLUDE_CDS_JAVA_HEAP 5257 bool JavaClasses::is_supported_for_archiving(oop obj) { 5258 Klass* klass = obj->klass(); 5259 5260 if (klass == vmClasses::ClassLoader_klass() || // ClassLoader::loader_data is malloc'ed. 5261 // The next 3 classes are used to implement java.lang.invoke, and are not used directly in 5262 // regular Java code. The implementation of java.lang.invoke uses generated hidden classes 5263 // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS. 5264 // So for now we cannot not support these classes for archiving. 5265 // 5266 // These objects typically are not referenced by static fields, but rather by resolved 5267 // constant pool entries, so excluding them shouldn't affect the archiving of static fields. 5268 klass == vmClasses::ResolvedMethodName_klass() || 5269 klass == vmClasses::MemberName_klass() || 5270 klass == vmClasses::Context_klass() || 5271 // It's problematic to archive Reference objects. One of the reasons is that 5272 // Reference::discovered may pull in unwanted objects (see JDK-8284336) 5273 klass->is_subclass_of(vmClasses::Reference_klass())) { 5274 return false; 5275 } 5276 5277 return true; 5278 } 5279 #endif 5280 5281 #ifndef PRODUCT 5282 5283 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check. 5284 5285 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name, 5286 const char* field_sig) { 5287 EXCEPTION_MARK; 5288 fieldDescriptor fd; 5289 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name); 5290 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 5291 InstanceKlass* ik = InstanceKlass::cast(k); 5292 TempNewSymbol f_name = SymbolTable::new_symbol(field_name); 5293 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig); 5294 if (!ik->find_local_field(f_name, f_sig, &fd)) { 5295 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 5296 return false; 5297 } 5298 if (fd.is_static()) { 5299 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 5300 return false; 5301 } 5302 if (fd.offset() == deserialized_offset ) { 5303 return true; 5304 } else { 5305 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.", 5306 klass_name, field_name, deserialized_offset, fd.offset()); 5307 return false; 5308 } 5309 } 5310 5311 void JavaClasses::check_offsets() { 5312 bool valid = true; 5313 5314 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 5315 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig) 5316 5317 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 5318 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig) 5319 5320 // Boxed primitive objects (java_lang_boxing_object) 5321 5322 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 5323 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 5324 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 5325 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 5326 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 5327 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 5328 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 5329 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 5330 5331 if (!valid) vm_exit_during_initialization("Field offset verification failed"); 5332 } 5333 5334 #endif // PRODUCT 5335 5336 int InjectedField::compute_offset() { 5337 InstanceKlass* ik = InstanceKlass::cast(klass()); 5338 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 5339 if (!may_be_java && !fs.field_flags().is_injected()) { 5340 // Only look at injected fields 5341 continue; 5342 } 5343 if (fs.name() == name() && fs.signature() == signature()) { 5344 return fs.offset(); 5345 } 5346 } 5347 ResourceMark rm; 5348 tty->print_cr("Invalid layout of %s at %s/%s%s", ik->external_name(), name()->as_C_string(), signature()->as_C_string(), may_be_java ? " (may_be_java)" : ""); 5349 #ifndef PRODUCT 5350 ik->print(); 5351 tty->print_cr("all fields:"); 5352 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 5353 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 5354 } 5355 #endif //PRODUCT 5356 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 5357 return -1; 5358 } 5359 5360 void javaClasses_init() { 5361 JavaClasses::compute_offsets(); 5362 JavaClasses::check_offsets(); 5363 FilteredFieldsMap::initialize(); // must be done after computing offsets. 5364 }