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/flatArrayKlass.hpp" 56 #include "oops/inlineKlass.inline.hpp" 57 #include "oops/instanceKlass.inline.hpp" 58 #include "oops/instanceMirrorKlass.inline.hpp" 59 #include "oops/klass.hpp" 60 #include "oops/klass.inline.hpp" 61 #include "oops/method.inline.hpp" 62 #include "oops/objArrayKlass.hpp" 63 #include "oops/objArrayOop.inline.hpp" 64 #include "oops/oopCast.inline.hpp" 65 #include "oops/oop.inline.hpp" 66 #include "oops/symbol.hpp" 67 #include "oops/recordComponent.hpp" 68 #include "oops/typeArrayOop.inline.hpp" 69 #include "prims/jvmtiExport.hpp" 70 #include "prims/methodHandles.hpp" 71 #include "prims/resolvedMethodTable.hpp" 72 #include "runtime/continuationEntry.inline.hpp" 73 #include "runtime/continuationJavaClasses.inline.hpp" 74 #include "runtime/fieldDescriptor.inline.hpp" 75 #include "runtime/frame.inline.hpp" 76 #include "runtime/handles.inline.hpp" 77 #include "runtime/handshake.hpp" 78 #include "runtime/init.hpp" 79 #include "runtime/interfaceSupport.inline.hpp" 80 #include "runtime/java.hpp" 81 #include "runtime/javaCalls.hpp" 82 #include "runtime/javaThread.hpp" 83 #include "runtime/jniHandles.inline.hpp" 84 #include "runtime/reflectionUtils.hpp" 85 #include "runtime/safepoint.hpp" 86 #include "runtime/safepointVerifiers.hpp" 87 #include "runtime/threadSMR.hpp" 88 #include "runtime/vframe.inline.hpp" 89 #include "runtime/vm_version.hpp" 90 #include "utilities/align.hpp" 91 #include "utilities/growableArray.hpp" 92 #include "utilities/preserveException.hpp" 93 #include "utilities/utf8.hpp" 94 #if INCLUDE_JVMCI 95 #include "jvmci/jvmciJavaClasses.hpp" 96 #endif 97 98 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 99 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 100 101 InjectedField JavaClasses::_injected_fields[] = { 102 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 103 }; 104 105 // Register native methods of Object 106 void java_lang_Object::register_natives(TRAPS) { 107 InstanceKlass* obj = vmClasses::Object_klass(); 108 Method::register_native(obj, vmSymbols::hashCode_name(), 109 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK); 110 Method::register_native(obj, vmSymbols::wait_name(), 111 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK); 112 Method::register_native(obj, vmSymbols::notify_name(), 113 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK); 114 Method::register_native(obj, vmSymbols::notifyAll_name(), 115 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK); 116 Method::register_native(obj, vmSymbols::clone_name(), 117 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD); 118 } 119 120 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 121 return _injected_fields[(int)id].compute_offset(); 122 } 123 124 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 125 *field_count = 0; 126 127 vmSymbolID sid = vmSymbols::find_sid(class_name); 128 if (sid == vmSymbolID::NO_SID) { 129 // Only well known classes can inject fields 130 return nullptr; 131 } 132 133 int count = 0; 134 int start = -1; 135 136 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 137 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \ 138 count++; \ 139 if (start == -1) { \ 140 start = (int)InjectedFieldID::klass##_##name##_enum; \ 141 } \ 142 } 143 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 144 #undef LOOKUP_INJECTED_FIELD 145 146 if (start != -1) { 147 *field_count = count; 148 return _injected_fields + start; 149 } 150 return nullptr; 151 } 152 153 154 // Helpful routine for computing field offsets at run time rather than hardcoding them 155 // Finds local fields only, including static fields. Static field offsets are from the 156 // beginning of the mirror. 157 void JavaClasses::compute_offset(int &dest_offset, 158 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol, 159 bool is_static) { 160 fieldDescriptor fd; 161 if (ik == nullptr) { 162 ResourceMark rm; 163 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string()); 164 vm_exit_during_initialization("Invalid layout of well-known class"); 165 } 166 167 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) { 168 ResourceMark rm; 169 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(), 170 name_symbol->as_C_string(), signature_symbol->as_C_string()); 171 #ifndef PRODUCT 172 // Prints all fields and offsets 173 Log(class) lt; 174 LogStream ls(lt.error()); 175 ik->print_on(&ls); 176 #endif //PRODUCT 177 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 178 } 179 dest_offset = fd.offset(); 180 } 181 182 // Overloading to pass name as a string. 183 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik, 184 const char* name_string, Symbol* signature_symbol, 185 bool is_static) { 186 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string)); 187 if (name == nullptr) { 188 ResourceMark rm; 189 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string); 190 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name()); 191 } 192 compute_offset(dest_offset, ik, name, signature_symbol, is_static); 193 } 194 195 // java_lang_String 196 197 int java_lang_String::_value_offset; 198 int java_lang_String::_hash_offset; 199 int java_lang_String::_hashIsZero_offset; 200 int java_lang_String::_coder_offset; 201 int java_lang_String::_flags_offset; 202 203 bool java_lang_String::_initialized; 204 205 206 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) { 207 uint8_t* addr = flags_addr(java_string); 208 uint8_t value = Atomic::load(addr); 209 while ((value & flag_mask) == 0) { 210 uint8_t old_value = value; 211 value |= flag_mask; 212 value = Atomic::cmpxchg(addr, old_value, value); 213 if (value == old_value) return false; // Flag bit changed from 0 to 1. 214 } 215 return true; // Flag bit is already 1. 216 } 217 218 #define STRING_FIELDS_DO(macro) \ 219 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \ 220 macro(_hash_offset, k, "hash", int_signature, false); \ 221 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \ 222 macro(_coder_offset, k, "coder", byte_signature, false); 223 224 void java_lang_String::compute_offsets() { 225 if (_initialized) { 226 return; 227 } 228 229 InstanceKlass* k = vmClasses::String_klass(); 230 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 231 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 232 233 _initialized = true; 234 } 235 236 #if INCLUDE_CDS 237 void java_lang_String::serialize_offsets(SerializeClosure* f) { 238 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 239 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 240 f->do_bool(&_initialized); 241 } 242 #endif 243 244 class CompactStringsFixup : public FieldClosure { 245 private: 246 bool _value; 247 248 public: 249 CompactStringsFixup(bool value) : _value(value) {} 250 251 void do_field(fieldDescriptor* fd) { 252 if (fd->name() == vmSymbols::compact_strings_name()) { 253 oop mirror = fd->field_holder()->java_mirror(); 254 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String"); 255 assert(mirror != nullptr, "String must have mirror already"); 256 mirror->bool_field_put(fd->offset(), _value); 257 } 258 } 259 }; 260 261 void java_lang_String::set_compact_strings(bool value) { 262 CompactStringsFixup fix(value); 263 vmClasses::String_klass()->do_local_static_fields(&fix); 264 } 265 266 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 267 assert(_initialized, "Must be initialized"); 268 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 269 270 // Create the String object first, so there's a chance that the String 271 // and the char array it points to end up in the same cache line. 272 oop obj; 273 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH); 274 275 // Create the char array. The String object must be handlized here 276 // because GC can happen as a result of the allocation attempt. 277 Handle h_obj(THREAD, obj); 278 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 279 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 280 281 // Point the String at the char array 282 obj = h_obj(); 283 set_value(obj, buffer); 284 // No need to zero the offset, allocation zero'ed the entire String object 285 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 286 return h_obj; 287 } 288 289 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) { 290 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 291 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 292 typeArrayOop buffer = value(h_obj()); 293 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 294 if (is_latin1) { 295 for (int index = 0; index < length; index++) { 296 buffer->byte_at_put(index, (jbyte)unicode[index]); 297 } 298 } else { 299 for (int index = 0; index < length; index++) { 300 buffer->char_at_put(index, unicode[index]); 301 } 302 } 303 304 #ifdef ASSERT 305 { 306 ResourceMark rm; 307 char* expected = UNICODE::as_utf8(unicode, length); 308 char* actual = as_utf8_string(h_obj()); 309 if (strcmp(expected, actual) != 0) { 310 fatal("Unicode conversion failure: %s --> %s", expected, actual); 311 } 312 } 313 #endif 314 315 return h_obj; 316 } 317 318 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) { 319 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL); 320 return h_obj(); 321 } 322 323 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 324 if (utf8_str == nullptr) { 325 return Handle(); 326 } 327 bool has_multibyte, is_latin1; 328 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 329 if (!CompactStrings) { 330 has_multibyte = true; 331 is_latin1 = false; 332 } 333 334 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 335 if (length > 0) { 336 if (!has_multibyte) { 337 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 338 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 339 } else if (is_latin1) { 340 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 341 } else { 342 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 343 } 344 } 345 346 #ifdef ASSERT 347 // This check is too strict when the input string is not a valid UTF8. 348 // For example, it may be created with arbitrary content via jni_NewStringUTF. 349 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, (int)strlen(utf8_str), false)) { 350 ResourceMark rm; 351 const char* expected = utf8_str; 352 char* actual = as_utf8_string(h_obj()); 353 if (strcmp(expected, actual) != 0) { 354 fatal("String conversion failure: %s --> %s", expected, actual); 355 } 356 } 357 #endif 358 359 return h_obj; 360 } 361 362 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 363 Handle h_obj = create_from_str(utf8_str, CHECK_NULL); 364 return h_obj(); 365 } 366 367 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 368 const char* utf8_str = (char*)symbol->bytes(); 369 int utf8_len = symbol->utf8_length(); 370 371 bool has_multibyte, is_latin1; 372 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 373 if (!CompactStrings) { 374 has_multibyte = true; 375 is_latin1 = false; 376 } 377 378 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 379 if (length > 0) { 380 if (!has_multibyte) { 381 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 382 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 383 } else if (is_latin1) { 384 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 385 } else { 386 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 387 } 388 } 389 390 #ifdef ASSERT 391 { 392 ResourceMark rm; 393 const char* expected = symbol->as_utf8(); 394 char* actual = as_utf8_string(h_obj()); 395 if (strncmp(expected, actual, utf8_len) != 0) { 396 fatal("Symbol conversion failure: %s --> %s", expected, actual); 397 } 398 } 399 #endif 400 401 return h_obj; 402 } 403 404 // Converts a C string to a Java String based on current encoding 405 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 406 assert(str != nullptr, "bad arguments"); 407 408 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *); 409 static to_java_string_fn_t _to_java_string_fn = nullptr; 410 411 if (_to_java_string_fn == nullptr) { 412 void *lib_handle = os::native_java_library(); 413 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform")); 414 #if defined(_WIN32) && !defined(_WIN64) 415 if (_to_java_string_fn == nullptr) { 416 // On 32 bit Windows, also try __stdcall decorated name 417 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8")); 418 } 419 #endif 420 if (_to_java_string_fn == nullptr) { 421 fatal("JNU_NewStringPlatform missing"); 422 } 423 } 424 425 jstring js = nullptr; 426 { 427 JavaThread* thread = THREAD; 428 HandleMark hm(thread); 429 ThreadToNativeFromVM ttn(thread); 430 js = (_to_java_string_fn)(thread->jni_environment(), str); 431 } 432 433 Handle native_platform_string(THREAD, JNIHandles::resolve(js)); 434 JNIHandles::destroy_local(js); // destroy local JNIHandle. 435 return native_platform_string; 436 } 437 438 // Converts a Java String to a native C string that can be used for 439 // native OS calls. 440 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 441 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 442 static to_platform_string_fn_t _to_platform_string_fn = nullptr; 443 444 if (_to_platform_string_fn == nullptr) { 445 void *lib_handle = os::native_java_library(); 446 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 447 if (_to_platform_string_fn == nullptr) { 448 fatal("GetStringPlatformChars missing"); 449 } 450 } 451 452 char *native_platform_string; 453 jstring js; 454 { JavaThread* thread = THREAD; 455 js = (jstring) JNIHandles::make_local(thread, java_string()); 456 HandleMark hm(thread); 457 ThreadToNativeFromVM ttn(thread); 458 JNIEnv *env = thread->jni_environment(); 459 bool is_copy; 460 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 461 assert(is_copy == JNI_TRUE, "is_copy value changed"); 462 } 463 464 // Uses a store barrier and therefore needs to be in vm state 465 JNIHandles::destroy_local(js); 466 467 return native_platform_string; 468 } 469 470 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) { 471 ResourceMark rm(THREAD); 472 return create_from_str(java_name->as_klass_external_name(), THREAD); 473 } 474 475 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 476 jchar* result = as_unicode_string_or_null(java_string, length); 477 if (result == nullptr) { 478 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 479 } 480 return result; 481 } 482 483 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) { 484 typeArrayOop value = java_lang_String::value(java_string); 485 length = java_lang_String::length(java_string, value); 486 bool is_latin1 = java_lang_String::is_latin1(java_string); 487 488 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 489 if (result != nullptr) { 490 if (!is_latin1) { 491 for (int index = 0; index < length; index++) { 492 result[index] = value->char_at(index); 493 } 494 } else { 495 for (int index = 0; index < length; index++) { 496 result[index] = ((jchar) value->byte_at(index)) & 0xff; 497 } 498 } 499 } 500 return result; 501 } 502 503 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) { 504 // The hash and hashIsZero fields are subject to a benign data race, 505 // making it crucial to ensure that any observable result of the 506 // calculation in this method stays correct under any possible read of 507 // these fields. Necessary restrictions to allow this to be correct 508 // without explicit memory fences or similar concurrency primitives is 509 // that we can ever only write to one of these two fields for a given 510 // String instance, and that the computation is idempotent and derived 511 // from immutable state 512 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized"); 513 if (java_lang_String::hash_is_set(java_string)) { 514 return java_string->int_field(_hash_offset); 515 } 516 517 typeArrayOop value = java_lang_String::value(java_string); 518 int length = java_lang_String::length(java_string, value); 519 bool is_latin1 = java_lang_String::is_latin1(java_string); 520 521 unsigned int hash = 0; 522 if (length > 0) { 523 if (is_latin1) { 524 hash = java_lang_String::hash_code(value->byte_at_addr(0), length); 525 } else { 526 hash = java_lang_String::hash_code(value->char_at_addr(0), length); 527 } 528 } 529 530 if (update) { 531 if (hash != 0) { 532 java_string->int_field_put(_hash_offset, hash); 533 } else { 534 java_string->bool_field_put(_hashIsZero_offset, true); 535 } 536 } 537 return hash; 538 } 539 540 unsigned int java_lang_String::hash_code(oop java_string) { 541 return hash_code_impl(java_string, /*update=*/true); 542 } 543 544 unsigned int java_lang_String::hash_code_noupdate(oop java_string) { 545 return hash_code_impl(java_string, /*update=*/false); 546 } 547 548 549 char* java_lang_String::as_quoted_ascii(oop java_string) { 550 typeArrayOop value = java_lang_String::value(java_string); 551 int length = java_lang_String::length(java_string, value); 552 bool is_latin1 = java_lang_String::is_latin1(java_string); 553 554 if (length == 0) return nullptr; 555 556 char* result; 557 int result_length; 558 if (!is_latin1) { 559 jchar* base = value->char_at_addr(0); 560 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 561 result = NEW_RESOURCE_ARRAY(char, result_length); 562 UNICODE::as_quoted_ascii(base, length, result, result_length); 563 } else { 564 jbyte* base = value->byte_at_addr(0); 565 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 566 result = NEW_RESOURCE_ARRAY(char, result_length); 567 UNICODE::as_quoted_ascii(base, length, result, result_length); 568 } 569 assert(result_length >= length + 1, "must not be shorter"); 570 assert(result_length == (int)strlen(result) + 1, "must match"); 571 return result; 572 } 573 574 Symbol* java_lang_String::as_symbol(oop java_string) { 575 typeArrayOop value = java_lang_String::value(java_string); 576 int length = java_lang_String::length(java_string, value); 577 bool is_latin1 = java_lang_String::is_latin1(java_string); 578 if (!is_latin1) { 579 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0); 580 Symbol* sym = SymbolTable::new_symbol(base, length); 581 return sym; 582 } else { 583 ResourceMark rm; 584 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 585 const char* base = UNICODE::as_utf8(position, length); 586 Symbol* sym = SymbolTable::new_symbol(base, length); 587 return sym; 588 } 589 } 590 591 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 592 typeArrayOop value = java_lang_String::value(java_string); 593 int length = java_lang_String::length(java_string, value); 594 bool is_latin1 = java_lang_String::is_latin1(java_string); 595 if (!is_latin1) { 596 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0); 597 return SymbolTable::probe_unicode(base, length); 598 } else { 599 ResourceMark rm; 600 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 601 const char* base = UNICODE::as_utf8(position, length); 602 return SymbolTable::probe(base, length); 603 } 604 } 605 606 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) { 607 assert(value_equals(value, java_lang_String::value(java_string)), 608 "value must be same as java_lang_String::value(java_string)"); 609 int length = java_lang_String::length(java_string, value); 610 if (length == 0) { 611 return 0; 612 } 613 if (!java_lang_String::is_latin1(java_string)) { 614 return UNICODE::utf8_length(value->char_at_addr(0), length); 615 } else { 616 return UNICODE::utf8_length(value->byte_at_addr(0), length); 617 } 618 } 619 620 int java_lang_String::utf8_length(oop java_string) { 621 typeArrayOop value = java_lang_String::value(java_string); 622 return utf8_length(java_string, value); 623 } 624 625 char* java_lang_String::as_utf8_string(oop java_string) { 626 int length; 627 return as_utf8_string(java_string, length); 628 } 629 630 char* java_lang_String::as_utf8_string(oop java_string, int& length) { 631 typeArrayOop value = java_lang_String::value(java_string); 632 length = java_lang_String::length(java_string, value); 633 bool is_latin1 = java_lang_String::is_latin1(java_string); 634 if (!is_latin1) { 635 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0); 636 return UNICODE::as_utf8(position, length); 637 } else { 638 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 639 return UNICODE::as_utf8(position, length); 640 } 641 } 642 643 // Uses a provided buffer if it's sufficiently large, otherwise allocates 644 // a resource array to fit 645 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, int buflen, int& utf8_len) { 646 typeArrayOop value = java_lang_String::value(java_string); 647 int len = java_lang_String::length(java_string, value); 648 bool is_latin1 = java_lang_String::is_latin1(java_string); 649 if (!is_latin1) { 650 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0); 651 utf8_len = UNICODE::utf8_length(position, len); 652 if (utf8_len >= buflen) { 653 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 654 } 655 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 656 } else { 657 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0); 658 utf8_len = UNICODE::utf8_length(position, len); 659 if (utf8_len >= buflen) { 660 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 661 } 662 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 663 } 664 } 665 666 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) { 667 assert(value_equals(value, java_lang_String::value(java_string)), 668 "value must be same as java_lang_String::value(java_string)"); 669 int length = java_lang_String::length(java_string, value); 670 bool is_latin1 = java_lang_String::is_latin1(java_string); 671 if (!is_latin1) { 672 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0); 673 return UNICODE::as_utf8(position, length, buf, buflen); 674 } else { 675 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 676 return UNICODE::as_utf8(position, length, buf, buflen); 677 } 678 } 679 680 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 681 typeArrayOop value = java_lang_String::value(java_string); 682 return as_utf8_string(java_string, value, buf, buflen); 683 } 684 685 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 686 typeArrayOop value = java_lang_String::value(java_string); 687 bool is_latin1 = java_lang_String::is_latin1(java_string); 688 assert(start + len <= java_lang_String::length(java_string), "just checking"); 689 if (!is_latin1) { 690 jchar* position = value->char_at_addr(start); 691 return UNICODE::as_utf8(position, len); 692 } else { 693 jbyte* position = value->byte_at_addr(start); 694 return UNICODE::as_utf8(position, len); 695 } 696 } 697 698 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) { 699 assert(value_equals(value, java_lang_String::value(java_string)), 700 "value must be same as java_lang_String::value(java_string)"); 701 assert(start + len <= java_lang_String::length(java_string), "just checking"); 702 bool is_latin1 = java_lang_String::is_latin1(java_string); 703 if (!is_latin1) { 704 jchar* position = value->char_at_addr(start); 705 return UNICODE::as_utf8(position, len, buf, buflen); 706 } else { 707 jbyte* position = value->byte_at_addr(start); 708 return UNICODE::as_utf8(position, len, buf, buflen); 709 } 710 } 711 712 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) { 713 assert(java_string->klass() == vmClasses::String_klass(), 714 "must be java_string"); 715 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 716 int length = java_lang_String::length(java_string, value); 717 if (length != len) { 718 return false; 719 } 720 bool is_latin1 = java_lang_String::is_latin1(java_string); 721 if (!is_latin1) { 722 for (int i = 0; i < len; i++) { 723 if (value->char_at(i) != chars[i]) { 724 return false; 725 } 726 } 727 } else { 728 for (int i = 0; i < len; i++) { 729 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 730 return false; 731 } 732 } 733 } 734 return true; 735 } 736 737 bool java_lang_String::equals(oop str1, oop str2) { 738 assert(str1->klass() == vmClasses::String_klass(), 739 "must be java String"); 740 assert(str2->klass() == vmClasses::String_klass(), 741 "must be java String"); 742 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1); 743 bool is_latin1 = java_lang_String::is_latin1(str1); 744 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2); 745 bool is_latin2 = java_lang_String::is_latin1(str2); 746 747 if (is_latin1 != is_latin2) { 748 // Strings with different coders are never equal. 749 return false; 750 } 751 return value_equals(value1, value2); 752 } 753 754 void java_lang_String::print(oop java_string, outputStream* st) { 755 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string"); 756 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 757 758 if (value == nullptr) { 759 // This can happen if, e.g., printing a String 760 // object before its initializer has been called 761 st->print("nullptr"); 762 return; 763 } 764 765 int length = java_lang_String::length(java_string, value); 766 bool is_latin1 = java_lang_String::is_latin1(java_string); 767 768 st->print("\""); 769 for (int index = 0; index < length; index++) { 770 jchar c = (!is_latin1) ? value->char_at(index) : 771 ((jchar) value->byte_at(index)) & 0xff; 772 if (c < ' ') { 773 st->print("\\x%02X", c); // print control characters e.g. \x0A 774 } else { 775 st->print("%c", c); 776 } 777 } 778 st->print("\""); 779 } 780 781 // java_lang_Class 782 783 int java_lang_Class::_klass_offset; 784 int java_lang_Class::_array_klass_offset; 785 int java_lang_Class::_oop_size_offset; 786 int java_lang_Class::_static_oop_field_count_offset; 787 int java_lang_Class::_class_loader_offset; 788 int java_lang_Class::_module_offset; 789 int java_lang_Class::_protection_domain_offset; 790 int java_lang_Class::_component_mirror_offset; 791 int java_lang_Class::_primary_mirror_offset; 792 int java_lang_Class::_secondary_mirror_offset; 793 int java_lang_Class::_signers_offset; 794 int java_lang_Class::_name_offset; 795 int java_lang_Class::_source_file_offset; 796 int java_lang_Class::_classData_offset; 797 int java_lang_Class::_classRedefinedCount_offset; 798 799 bool java_lang_Class::_offsets_computed = false; 800 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr; 801 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr; 802 803 #ifdef ASSERT 804 inline static void assert_valid_static_string_field(fieldDescriptor* fd) { 805 assert(fd->has_initial_value(), "caller should have checked this"); 806 assert(fd->field_type() == T_OBJECT, "caller should have checked this"); 807 // Can't use vmSymbols::string_signature() as fd->signature() may have been relocated 808 // during DumpSharedSpaces 809 assert(fd->signature()->equals("Ljava/lang/String;"), "just checking"); 810 } 811 #endif 812 813 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 814 DEBUG_ONLY(assert_valid_static_string_field(fd);) 815 oop string = fd->string_initial_value(CHECK); 816 mirror()->obj_field_put(fd->offset(), string); 817 } 818 819 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) { 820 assert(fd->has_initial_value(), "caller should have checked this"); 821 BasicType t = fd->field_type(); 822 switch (t) { 823 case T_BYTE: 824 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 825 break; 826 case T_BOOLEAN: 827 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 828 break; 829 case T_CHAR: 830 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 831 break; 832 case T_SHORT: 833 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 834 break; 835 case T_INT: 836 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 837 break; 838 case T_FLOAT: 839 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 840 break; 841 case T_DOUBLE: 842 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 843 break; 844 case T_LONG: 845 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 846 break; 847 default: 848 // Illegal ConstantValue attribute in class file should have been 849 // caught during classfile parsing. 850 ShouldNotReachHere(); 851 } 852 } 853 854 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 855 assert(mirror.not_null() && fd->is_static(), "just checking"); 856 if (fd->has_initial_value()) { 857 if (fd->field_type() != T_OBJECT) { 858 initialize_static_primitive_field(fd, mirror); 859 } else { 860 initialize_static_string_field(fd, mirror, CHECK); 861 } 862 } 863 } 864 865 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 866 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 867 868 // If the offset was read from the shared archive, it was fixed up already 869 if (!k->is_shared()) { 870 if (k->is_instance_klass()) { 871 // During bootstrap, java.lang.Class wasn't loaded so static field 872 // offsets were computed without the size added it. Go back and 873 // update all the static field offsets to included the size. 874 875 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow 876 // content updates. So the FieldInfo stream has to be decompressed into a temporary array, 877 // static fields offsets are updated in this array before reencoding everything into 878 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream. 879 880 int java_fields; 881 int injected_fields; 882 InstanceKlass* ik = InstanceKlass::cast(k); 883 GrowableArray<FieldInfo>* fields = 884 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(), 885 &java_fields, &injected_fields); 886 for (int i = 0; i < fields->length(); i++) { 887 FieldInfo* fi = fields->adr_at(i); 888 if (fi->access_flags().is_static()) { 889 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields()); 890 } 891 } 892 Array<u1>* old_stream = ik->fieldinfo_stream(); 893 assert(fields->length() == (java_fields + injected_fields), "Must be"); 894 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK); 895 ik->set_fieldinfo_stream(new_fis); 896 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream); 897 } 898 } 899 900 if (k->is_shared() && k->has_archived_mirror_index()) { 901 if (ArchiveHeapLoader::is_in_use()) { 902 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK); 903 assert(present, "Missing archived mirror for %s", k->external_name()); 904 return; 905 } else { 906 k->clear_java_mirror_handle(); 907 k->clear_archived_mirror_index(); 908 } 909 } 910 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK); 911 } 912 913 void java_lang_Class::initialize_mirror_fields(Klass* k, 914 Handle mirror, 915 Handle protection_domain, 916 Handle classData, 917 TRAPS) { 918 // Set protection domain also 919 set_protection_domain(mirror(), protection_domain()); 920 921 // Initialize static fields 922 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 923 924 // Set classData 925 set_class_data(mirror(), classData()); 926 } 927 928 // Set the java.lang.Module module field in the java_lang_Class mirror 929 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) { 930 if (module.is_null()) { 931 // During startup, the module may be null only if java.base has not been defined yet. 932 // Put the class on the fixup_module_list to patch later when the java.lang.Module 933 // for java.base is known. But note that since we captured the null module another 934 // thread may have completed that initialization. 935 936 bool javabase_was_defined = false; 937 { 938 MutexLocker m1(current, Module_lock); 939 // Keep list of classes needing java.base module fixup 940 if (!ModuleEntryTable::javabase_defined()) { 941 assert(k->java_mirror() != nullptr, "Class's mirror is null"); 942 k->class_loader_data()->inc_keep_alive(); 943 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized"); 944 fixup_module_field_list()->push(k); 945 } else { 946 javabase_was_defined = true; 947 } 948 } 949 950 // If java.base was already defined then patch this particular class with java.base. 951 if (javabase_was_defined) { 952 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 953 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr, 954 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 955 Handle javabase_handle(current, javabase_entry->module()); 956 set_module(mirror(), javabase_handle()); 957 } 958 } else { 959 assert(Universe::is_module_initialized() || 960 (ModuleEntryTable::javabase_defined() && 961 (module() == ModuleEntryTable::javabase_moduleEntry()->module())), 962 "Incorrect java.lang.Module specification while creating mirror"); 963 set_module(mirror(), module()); 964 } 965 } 966 967 // Statically allocate fixup lists because they always get created. 968 void java_lang_Class::allocate_fixup_lists() { 969 GrowableArray<Klass*>* mirror_list = 970 new (mtClass) GrowableArray<Klass*>(40, mtClass); 971 set_fixup_mirror_list(mirror_list); 972 973 GrowableArray<Klass*>* module_list = 974 new (mtModule) GrowableArray<Klass*>(500, mtModule); 975 set_fixup_module_field_list(module_list); 976 } 977 978 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData, 979 Handle& mirror, Handle& comp_mirror, TRAPS) { 980 // Allocate mirror (java.lang.Class instance) 981 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK); 982 mirror = Handle(THREAD, mirror_oop); 983 984 // Setup indirection from mirror->klass 985 set_klass(mirror(), k); 986 987 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 988 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 989 990 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 991 992 // It might also have a component mirror. This mirror must already exist. 993 if (k->is_array_klass()) { 994 if (k->is_flatArray_klass()) { 995 Klass* element_klass = (Klass*) FlatArrayKlass::cast(k)->element_klass(); 996 assert(element_klass->is_inline_klass(), "Must be inline type component"); 997 if (is_scratch) { 998 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass)); 999 } else { 1000 InlineKlass* vk = InlineKlass::cast(element_klass); 1001 comp_mirror = Handle(THREAD, vk->val_mirror()); 1002 } 1003 } else if (k->is_typeArray_klass()) { 1004 BasicType type = TypeArrayKlass::cast(k)->element_type(); 1005 if (is_scratch) { 1006 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type)); 1007 } else { 1008 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 1009 } 1010 } else { 1011 assert(k->is_objArray_klass(), "Must be"); 1012 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1013 assert(element_klass != nullptr, "Must have an element klass"); 1014 oop comp_oop = element_klass->java_mirror(); 1015 if (element_klass->is_inline_klass()) { 1016 InlineKlass* ik = InlineKlass::cast(element_klass); 1017 comp_oop = k->name()->is_Q_array_signature() ? ik->val_mirror() : ik->ref_mirror(); 1018 } 1019 if (is_scratch) { 1020 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass)); 1021 } else { 1022 comp_mirror = Handle(THREAD, comp_oop); 1023 } 1024 } 1025 assert(comp_mirror() != nullptr, "must have a mirror"); 1026 1027 // Two-way link between the array klass and its component mirror: 1028 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 1029 set_component_mirror(mirror(), comp_mirror()); 1030 // See below for ordering dependencies between field array_klass in component mirror 1031 // and java_mirror in this klass. 1032 } else { 1033 assert(k->is_instance_klass(), "Must be"); 1034 1035 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD); 1036 if (HAS_PENDING_EXCEPTION) { 1037 // If any of the fields throws an exception like OOM remove the klass field 1038 // from the mirror so GC doesn't follow it after the klass has been deallocated. 1039 // This mirror looks like a primitive type, which logically it is because it 1040 // it represents no class. 1041 set_klass(mirror(), nullptr); 1042 return; 1043 } 1044 } 1045 } 1046 1047 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 1048 Handle module, Handle protection_domain, 1049 Handle classData, TRAPS) { 1050 assert(k != nullptr, "Use create_basic_type_mirror for primitive types"); 1051 assert(k->java_mirror() == nullptr, "should only assign mirror once"); 1052 1053 // Use this moment of initialization to cache modifier_flags also, 1054 // to support Class.getModifiers(). Instance classes recalculate 1055 // the cached flags after the class file is parsed, but before the 1056 // class is put into the system dictionary. 1057 int computed_modifiers = k->compute_modifier_flags(); 1058 k->set_modifier_flags(computed_modifiers); 1059 // Class_klass has to be loaded because it is used to allocate 1060 // the mirror. 1061 if (vmClasses::Class_klass_loaded()) { 1062 Handle mirror; 1063 Handle comp_mirror; 1064 1065 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK); 1066 1067 // set the classLoader field in the java_lang_Class instance 1068 assert(class_loader() == k->class_loader(), "should be same"); 1069 set_class_loader(mirror(), class_loader()); 1070 1071 // Setup indirection from klass->mirror 1072 // after any exceptions can happen during allocations. 1073 k->set_java_mirror(mirror); 1074 1075 // Set the module field in the java_lang_Class instance. This must be done 1076 // after the mirror is set. 1077 set_mirror_module_field(THREAD, k, mirror, module); 1078 1079 if (comp_mirror() != nullptr) { 1080 // Set after k->java_mirror() is published, because compiled code running 1081 // concurrently doesn't expect a k to have a null java_mirror. 1082 release_set_array_klass(comp_mirror(), k); 1083 } 1084 1085 if (k->is_inline_klass()) { 1086 oop secondary_mirror = create_secondary_mirror(k, mirror, CHECK); 1087 set_primary_mirror(mirror(), mirror()); 1088 set_secondary_mirror(mirror(), secondary_mirror); 1089 } 1090 if (DumpSharedSpaces) { 1091 create_scratch_mirror(k, CHECK); 1092 } 1093 } else { 1094 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized"); 1095 fixup_mirror_list()->push(k); 1096 } 1097 } 1098 // Create the secondary mirror for inline class. Sets all the fields of this java.lang.Class 1099 // instance with the same value as the primary mirror 1100 oop java_lang_Class::create_secondary_mirror(Klass* k, Handle mirror, TRAPS) { 1101 assert(k->is_inline_klass(), "primitive class"); 1102 // Allocate mirror (java.lang.Class instance) 1103 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK_0); 1104 Handle secondary_mirror(THREAD, mirror_oop); 1105 1106 java_lang_Class::set_klass(secondary_mirror(), k); 1107 java_lang_Class::set_static_oop_field_count(secondary_mirror(), static_oop_field_count(mirror())); 1108 1109 set_protection_domain(secondary_mirror(), protection_domain(mirror())); 1110 set_class_loader(secondary_mirror(), class_loader(mirror())); 1111 // ## handle if java.base is not yet defined 1112 set_module(secondary_mirror(), module(mirror())); 1113 set_primary_mirror(secondary_mirror(), mirror()); 1114 set_secondary_mirror(secondary_mirror(), secondary_mirror()); 1115 return secondary_mirror(); 1116 } 1117 1118 #if INCLUDE_CDS_JAVA_HEAP 1119 // The "scratch mirror" stores the states of the mirror object that can be 1120 // decided at dump time (such as the initial values of the static fields, the 1121 // component mirror, etc). At runtime, more information is added to it by 1122 // java_lang_Class::restore_archived_mirror(). 1123 // 1124 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror() 1125 // produces the same result as /*runtime*/create_mirror(). 1126 // 1127 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the 1128 // latter may contain dumptime-specific information that cannot be archived 1129 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution). 1130 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) { 1131 if (k->class_loader() != nullptr && 1132 k->class_loader() != SystemDictionary::java_platform_loader() && 1133 k->class_loader() != SystemDictionary::java_system_loader()) { 1134 // We only archive the mirrors of classes loaded by the built-in loaders 1135 return; 1136 } 1137 1138 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime 1139 Handle mirror; 1140 Handle comp_mirror; 1141 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK); 1142 1143 if (comp_mirror() != nullptr) { 1144 release_set_array_klass(comp_mirror(), k); 1145 } 1146 1147 HeapShared::set_scratch_java_mirror(k, mirror()); 1148 } 1149 1150 // Returns true if the mirror is updated, false if no archived mirror 1151 // data is present. After the archived mirror object is restored, the 1152 // shared klass' _has_raw_archived_mirror flag is cleared. 1153 bool java_lang_Class::restore_archived_mirror(Klass *k, 1154 Handle class_loader, Handle module, 1155 Handle protection_domain, TRAPS) { 1156 // Postpone restoring archived mirror until java.lang.Class is loaded. Please 1157 // see more details in vmClasses::resolve_all(). 1158 if (!vmClasses::Class_klass_loaded()) { 1159 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized"); 1160 fixup_mirror_list()->push(k); 1161 return true; 1162 } 1163 1164 oop m = k->archived_java_mirror(); 1165 assert(m != nullptr, "must have stored non-null archived mirror"); 1166 1167 // Sanity: clear it now to prevent re-initialization if any of the following fails 1168 k->clear_archived_mirror_index(); 1169 1170 // mirror is archived, restore 1171 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m)); 1172 assert(as_Klass(m) == k, "must be"); 1173 Handle mirror(THREAD, m); 1174 1175 if (!k->is_array_klass()) { 1176 // - local static final fields with initial values were initialized at dump time 1177 1178 if (protection_domain.not_null()) { 1179 set_protection_domain(mirror(), protection_domain()); 1180 } 1181 } 1182 1183 assert(class_loader() == k->class_loader(), "should be same"); 1184 if (class_loader.not_null()) { 1185 set_class_loader(mirror(), class_loader()); 1186 } 1187 1188 k->set_java_mirror(mirror); 1189 1190 set_mirror_module_field(THREAD, k, mirror, module); 1191 1192 if (log_is_enabled(Trace, cds, heap, mirror)) { 1193 ResourceMark rm(THREAD); 1194 log_trace(cds, heap, mirror)( 1195 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1196 } 1197 1198 return true; 1199 } 1200 #endif // INCLUDE_CDS_JAVA_HEAP 1201 1202 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1203 assert(_module_offset != 0, "must have been computed already"); 1204 set_module(k->java_mirror(), module()); 1205 } 1206 1207 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) { 1208 assert(_oop_size_offset != 0, "must be set"); 1209 assert(size > 0, "Oop size must be greater than zero, not " SIZE_FORMAT, size); 1210 assert(size <= INT_MAX, "Lossy conversion: " SIZE_FORMAT, size); 1211 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size; 1212 } 1213 1214 int java_lang_Class::static_oop_field_count(oop java_class) { 1215 assert(_static_oop_field_count_offset != 0, "must be set"); 1216 return java_class->int_field(_static_oop_field_count_offset); 1217 } 1218 1219 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1220 assert(_static_oop_field_count_offset != 0, "must be set"); 1221 java_class->int_field_put(_static_oop_field_count_offset, size); 1222 } 1223 1224 oop java_lang_Class::protection_domain(oop java_class) { 1225 assert(_protection_domain_offset != 0, "must be set"); 1226 return java_class->obj_field(_protection_domain_offset); 1227 } 1228 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1229 assert(_protection_domain_offset != 0, "must be set"); 1230 java_class->obj_field_put(_protection_domain_offset, pd); 1231 } 1232 1233 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1234 assert(_component_mirror_offset != 0, "must be set"); 1235 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1236 } 1237 oop java_lang_Class::component_mirror(oop java_class) { 1238 assert(_component_mirror_offset != 0, "must be set"); 1239 return java_class->obj_field(_component_mirror_offset); 1240 } 1241 1242 oop java_lang_Class::primary_mirror(oop java_class) { 1243 assert(_primary_mirror_offset != 0, "must be set"); 1244 return java_class->obj_field(_primary_mirror_offset); 1245 } 1246 1247 void java_lang_Class::set_primary_mirror(oop java_class, oop mirror) { 1248 assert(_primary_mirror_offset != 0, "must be set"); 1249 java_class->obj_field_put(_primary_mirror_offset, mirror); 1250 } 1251 1252 oop java_lang_Class::secondary_mirror(oop java_class) { 1253 assert(_secondary_mirror_offset != 0, "must be set"); 1254 return java_class->obj_field(_secondary_mirror_offset); 1255 } 1256 1257 void java_lang_Class::set_secondary_mirror(oop java_class, oop mirror) { 1258 assert(_secondary_mirror_offset != 0, "must be set"); 1259 java_class->obj_field_put(_secondary_mirror_offset, mirror); 1260 } 1261 1262 objArrayOop java_lang_Class::signers(oop java_class) { 1263 assert(_signers_offset != 0, "must be set"); 1264 return (objArrayOop)java_class->obj_field(_signers_offset); 1265 } 1266 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 1267 assert(_signers_offset != 0, "must be set"); 1268 java_class->obj_field_put(_signers_offset, signers); 1269 } 1270 1271 oop java_lang_Class::class_data(oop java_class) { 1272 assert(_classData_offset != 0, "must be set"); 1273 return java_class->obj_field(_classData_offset); 1274 } 1275 void java_lang_Class::set_class_data(oop java_class, oop class_data) { 1276 assert(_classData_offset != 0, "must be set"); 1277 java_class->obj_field_put(_classData_offset, class_data); 1278 } 1279 1280 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1281 assert(_class_loader_offset != 0, "offsets should have been initialized"); 1282 java_class->obj_field_put(_class_loader_offset, loader); 1283 } 1284 1285 oop java_lang_Class::class_loader(oop java_class) { 1286 assert(_class_loader_offset != 0, "must be set"); 1287 return java_class->obj_field(_class_loader_offset); 1288 } 1289 1290 oop java_lang_Class::module(oop java_class) { 1291 assert(_module_offset != 0, "must be set"); 1292 return java_class->obj_field(_module_offset); 1293 } 1294 1295 void java_lang_Class::set_module(oop java_class, oop module) { 1296 assert(_module_offset != 0, "must be set"); 1297 java_class->obj_field_put(_module_offset, module); 1298 } 1299 1300 oop java_lang_Class::name(Handle java_class, TRAPS) { 1301 assert(_name_offset != 0, "must be set"); 1302 oop o = java_class->obj_field(_name_offset); 1303 if (o == nullptr) { 1304 o = StringTable::intern(as_external_name(java_class()), THREAD); 1305 java_class->obj_field_put(_name_offset, o); 1306 } 1307 return o; 1308 } 1309 1310 oop java_lang_Class::source_file(oop java_class) { 1311 assert(_source_file_offset != 0, "must be set"); 1312 return java_class->obj_field(_source_file_offset); 1313 } 1314 1315 void java_lang_Class::set_source_file(oop java_class, oop source_file) { 1316 assert(_source_file_offset != 0, "must be set"); 1317 java_class->obj_field_put(_source_file_offset, source_file); 1318 } 1319 1320 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1321 // This should be improved by adding a field at the Java level or by 1322 // introducing a new VM klass (see comment in ClassFileParser) 1323 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL); 1324 if (type != T_VOID) { 1325 Klass* aklass = Universe::typeArrayKlassObj(type); 1326 assert(aklass != nullptr, "correct bootstrap"); 1327 release_set_array_klass(java_class, aklass); 1328 } 1329 #ifdef ASSERT 1330 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass()); 1331 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1332 #endif 1333 return java_class; 1334 } 1335 1336 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1337 assert(is_instance(java_class), "must be a Class object"); 1338 java_class->metadata_field_put(_klass_offset, klass); 1339 } 1340 1341 1342 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1343 assert(is_instance(java_class), "must be a Class object"); 1344 Symbol* name = nullptr; 1345 bool is_instance = false; 1346 bool is_Q_descriptor = false; 1347 if (is_primitive(java_class)) { 1348 name = vmSymbols::type_signature(primitive_type(java_class)); 1349 } else { 1350 Klass* k = as_Klass(java_class); 1351 is_instance = k->is_instance_klass(); 1352 is_Q_descriptor = k->is_inline_klass() && is_secondary_mirror(java_class); 1353 name = k->name(); 1354 } 1355 if (name == nullptr) { 1356 st->print("<null>"); 1357 return; 1358 } 1359 if (is_instance) { 1360 st->print(is_Q_descriptor ? "Q" : "L"); 1361 } 1362 st->write((char*) name->base(), (int) name->utf8_length()); 1363 if (is_instance) st->print(";"); 1364 } 1365 1366 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) { 1367 assert(is_instance(java_class), "must be a Class object"); 1368 Symbol* name; 1369 if (is_primitive(java_class)) { 1370 name = vmSymbols::type_signature(primitive_type(java_class)); 1371 // Because this can create a new symbol, the caller has to decrement 1372 // the refcount, so make adjustment here and below for symbols returned 1373 // that are not created or incremented due to a successful lookup. 1374 name->increment_refcount(); 1375 } else { 1376 Klass* k = as_Klass(java_class); 1377 if (!k->is_instance_klass()) { 1378 name = k->name(); 1379 name->increment_refcount(); 1380 } else { 1381 ResourceMark rm; 1382 const char* sigstr; 1383 if (k->is_inline_klass() && is_secondary_mirror(java_class)) { 1384 sigstr = InlineKlass::cast(k)->val_signature_name(); 1385 } else { 1386 sigstr = k->signature_name(); 1387 } 1388 int siglen = (int) strlen(sigstr); 1389 if (!intern_if_not_found) { 1390 name = SymbolTable::probe(sigstr, siglen); 1391 } else { 1392 name = SymbolTable::new_symbol(sigstr, siglen); 1393 } 1394 } 1395 } 1396 return name; 1397 } 1398 1399 // Returns the Java name for this Java mirror (Resource allocated) 1400 // See Klass::external_name(). 1401 // For primitive type Java mirrors, its type name is returned. 1402 const char* java_lang_Class::as_external_name(oop java_class) { 1403 assert(is_instance(java_class), "must be a Class object"); 1404 const char* name = nullptr; 1405 if (is_primitive(java_class)) { 1406 name = type2name(primitive_type(java_class)); 1407 } else { 1408 name = as_Klass(java_class)->external_name(); 1409 } 1410 if (name == nullptr) { 1411 name = "<null>"; 1412 } 1413 return name; 1414 } 1415 1416 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1417 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1418 assert(k == nullptr || k->is_klass() && k->is_array_klass(), "should be array klass"); 1419 return k; 1420 } 1421 1422 1423 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1424 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1425 java_class->release_metadata_field_put(_array_klass_offset, klass); 1426 } 1427 1428 1429 BasicType java_lang_Class::primitive_type(oop java_class) { 1430 assert(is_primitive(java_class), "just checking"); 1431 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1432 BasicType type = T_VOID; 1433 if (ak != nullptr) { 1434 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1435 type = ArrayKlass::cast(ak)->element_type(); 1436 } else { 1437 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1438 } 1439 #ifdef ASSERT 1440 if (DumpSharedSpaces) { 1441 oop mirror = Universe::java_mirror(type); 1442 oop scratch_mirror = HeapShared::scratch_java_mirror(type); 1443 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent"); 1444 } else { 1445 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1446 } 1447 #endif 1448 return type; 1449 } 1450 1451 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1452 assert(is_instance(java_class), "must be a Class object"); 1453 if (is_primitive(java_class)) { 1454 if (reference_klass != nullptr) 1455 (*reference_klass) = nullptr; 1456 return primitive_type(java_class); 1457 } else { 1458 if (reference_klass != nullptr) 1459 (*reference_klass) = as_Klass(java_class); 1460 return T_OBJECT; 1461 } 1462 } 1463 1464 1465 oop java_lang_Class::primitive_mirror(BasicType t) { 1466 oop mirror = Universe::java_mirror(t); 1467 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class"); 1468 assert(is_primitive(mirror), "must be primitive"); 1469 return mirror; 1470 } 1471 1472 #define CLASS_FIELDS_DO(macro) \ 1473 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \ 1474 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1475 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1476 macro(_primary_mirror_offset, k, "primaryType", class_signature, false); \ 1477 macro(_secondary_mirror_offset, k, "secondaryType", class_signature, false); \ 1478 macro(_module_offset, k, "module", module_signature, false); \ 1479 macro(_name_offset, k, "name", string_signature, false); \ 1480 macro(_classData_offset, k, "classData", object_signature, false); 1481 1482 void java_lang_Class::compute_offsets() { 1483 if (_offsets_computed) { 1484 return; 1485 } 1486 1487 _offsets_computed = true; 1488 1489 InstanceKlass* k = vmClasses::Class_klass(); 1490 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1491 1492 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1493 } 1494 1495 #if INCLUDE_CDS 1496 void java_lang_Class::serialize_offsets(SerializeClosure* f) { 1497 f->do_bool(&_offsets_computed); 1498 1499 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1500 1501 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1502 } 1503 #endif 1504 1505 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1506 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1507 return the_class_mirror->int_field(_classRedefinedCount_offset); 1508 } 1509 1510 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1511 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1512 the_class_mirror->int_field_put(_classRedefinedCount_offset, value); 1513 } 1514 1515 1516 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1517 // platform thread structure, and a eetop offset which was used for thread 1518 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1519 // merged, so in the HotSpot VM we just use the eetop field for the thread 1520 // instead of the privateInfo_offset. 1521 // 1522 // Note: The stackSize field is only present starting in 1.4. 1523 1524 int java_lang_Thread_FieldHolder::_group_offset; 1525 int java_lang_Thread_FieldHolder::_priority_offset; 1526 int java_lang_Thread_FieldHolder::_stackSize_offset; 1527 int java_lang_Thread_FieldHolder::_daemon_offset; 1528 int java_lang_Thread_FieldHolder::_thread_status_offset; 1529 1530 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \ 1531 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1532 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1533 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1534 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1535 macro(_thread_status_offset, k, "threadStatus", int_signature, false) 1536 1537 void java_lang_Thread_FieldHolder::compute_offsets() { 1538 assert(_group_offset == 0, "offsets should be initialized only once"); 1539 1540 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass(); 1541 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1542 } 1543 1544 #if INCLUDE_CDS 1545 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) { 1546 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1547 } 1548 #endif 1549 1550 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) { 1551 return holder->obj_field(_group_offset); 1552 } 1553 1554 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) { 1555 return (ThreadPriority)holder->int_field(_priority_offset); 1556 } 1557 1558 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) { 1559 holder->int_field_put(_priority_offset, priority); 1560 } 1561 1562 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) { 1563 return holder->long_field(_stackSize_offset); 1564 } 1565 1566 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) { 1567 return holder->bool_field(_daemon_offset) != 0; 1568 } 1569 1570 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) { 1571 assert(val, "daemon status is never turned off"); 1572 holder->bool_field_put(_daemon_offset, val); 1573 } 1574 1575 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) { 1576 holder->int_field_put(_thread_status_offset, static_cast<int>(status)); 1577 } 1578 1579 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) { 1580 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset)); 1581 } 1582 1583 1584 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0; 1585 1586 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \ 1587 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true); 1588 1589 void java_lang_Thread_Constants::compute_offsets() { 1590 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once"); 1591 1592 InstanceKlass* k = vmClasses::Thread_Constants_klass(); 1593 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1594 } 1595 1596 #if INCLUDE_CDS 1597 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) { 1598 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1599 } 1600 #endif 1601 1602 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() { 1603 InstanceKlass* k = vmClasses::Thread_Constants_klass(); 1604 oop base = k->static_field_base_raw(); 1605 return base->obj_field(_static_VTHREAD_GROUP_offset); 1606 } 1607 1608 1609 int java_lang_Thread::_holder_offset; 1610 int java_lang_Thread::_name_offset; 1611 int java_lang_Thread::_contextClassLoader_offset; 1612 int java_lang_Thread::_inheritedAccessControlContext_offset; 1613 int java_lang_Thread::_eetop_offset; 1614 int java_lang_Thread::_jvmti_thread_state_offset; 1615 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset; 1616 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset; 1617 int java_lang_Thread::_interrupted_offset; 1618 int java_lang_Thread::_tid_offset; 1619 int java_lang_Thread::_continuation_offset; 1620 int java_lang_Thread::_park_blocker_offset; 1621 int java_lang_Thread::_scopedValueBindings_offset; 1622 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;) 1623 1624 #define THREAD_FIELDS_DO(macro) \ 1625 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \ 1626 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1627 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \ 1628 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \ 1629 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1630 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \ 1631 macro(_tid_offset, k, "tid", long_signature, false); \ 1632 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \ 1633 macro(_continuation_offset, k, "cont", continuation_signature, false); \ 1634 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false); 1635 1636 void java_lang_Thread::compute_offsets() { 1637 assert(_holder_offset == 0, "offsets should be initialized only once"); 1638 1639 InstanceKlass* k = vmClasses::Thread_klass(); 1640 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1641 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1642 } 1643 1644 #if INCLUDE_CDS 1645 void java_lang_Thread::serialize_offsets(SerializeClosure* f) { 1646 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1647 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1648 } 1649 #endif 1650 1651 JavaThread* java_lang_Thread::thread(oop java_thread) { 1652 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset)); 1653 } 1654 1655 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) { 1656 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset)); 1657 } 1658 1659 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1660 java_thread->address_field_put(_eetop_offset, (address)thread); 1661 } 1662 1663 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) { 1664 java_thread->release_address_field_put(_eetop_offset, (address)thread); 1665 } 1666 1667 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) { 1668 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset); 1669 } 1670 1671 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) { 1672 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state); 1673 } 1674 1675 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) { 1676 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset); 1677 } 1678 1679 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) { 1680 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked"); 1681 int val = VTMS_transition_disable_count(java_thread); 1682 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1); 1683 } 1684 1685 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) { 1686 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked"); 1687 int val = VTMS_transition_disable_count(java_thread); 1688 assert(val > 0, "VTMS_transition_disable_count should never be negative"); 1689 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1); 1690 } 1691 1692 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) { 1693 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset); 1694 } 1695 1696 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) { 1697 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val); 1698 } 1699 1700 int java_lang_Thread::is_in_VTMS_transition_offset() { 1701 return _jvmti_is_in_VTMS_transition_offset; 1702 } 1703 1704 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) { 1705 assert(java_thread != nullptr, "need a java_lang_Thread pointer here"); 1706 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr); 1707 } 1708 1709 oop java_lang_Thread::holder(oop java_thread) { 1710 // Note: may return null if the thread is still attaching 1711 return java_thread->obj_field(_holder_offset); 1712 } 1713 1714 bool java_lang_Thread::interrupted(oop java_thread) { 1715 // Make sure the caller can safely access oops. 1716 assert(Thread::current()->is_VM_thread() || 1717 (JavaThread::current()->thread_state() != _thread_blocked && 1718 JavaThread::current()->thread_state() != _thread_in_native), 1719 "Unsafe access to oop"); 1720 return java_thread->bool_field_volatile(_interrupted_offset); 1721 } 1722 1723 void java_lang_Thread::set_interrupted(oop java_thread, bool val) { 1724 // Make sure the caller can safely access oops. 1725 assert(Thread::current()->is_VM_thread() || 1726 (JavaThread::current()->thread_state() != _thread_blocked && 1727 JavaThread::current()->thread_state() != _thread_in_native), 1728 "Unsafe access to oop"); 1729 java_thread->bool_field_put_volatile(_interrupted_offset, val); 1730 } 1731 1732 1733 oop java_lang_Thread::name(oop java_thread) { 1734 return java_thread->obj_field(_name_offset); 1735 } 1736 1737 1738 void java_lang_Thread::set_name(oop java_thread, oop name) { 1739 java_thread->obj_field_put(_name_offset, name); 1740 } 1741 1742 // Convenience macros for setting and getting Thread fields that 1743 // are actually stored in the FieldHolder object of the thread. 1744 // The FieldHolder can be null whilst a thread is attaching via 1745 // JNI, and when the main thread is attaching. 1746 1747 // The default value should be the default/zero initialized value 1748 // of the field as it would be in java.lang.Thread.FieldHolder. 1749 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \ 1750 { \ 1751 oop holder = java_lang_Thread::holder(java_thread); \ 1752 if (holder != nullptr) \ 1753 return java_lang_Thread_FieldHolder::field(holder); \ 1754 else \ 1755 return default_val; \ 1756 } 1757 1758 // We should never be trying to set a field of an attaching thread. 1759 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \ 1760 { \ 1761 oop holder = java_lang_Thread::holder(java_thread); \ 1762 assert(holder != nullptr, "Thread not fully initialized"); \ 1763 java_lang_Thread_FieldHolder::set_##field(holder, value); \ 1764 } 1765 1766 1767 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1768 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0); 1769 } 1770 1771 1772 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1773 SET_FIELDHOLDER_FIELD(java_thread, priority, priority) 1774 } 1775 1776 1777 oop java_lang_Thread::threadGroup(oop java_thread) { 1778 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr); 1779 } 1780 1781 1782 bool java_lang_Thread::is_alive(oop java_thread) { 1783 JavaThread* thr = java_lang_Thread::thread(java_thread); 1784 return (thr != nullptr); 1785 } 1786 1787 1788 bool java_lang_Thread::is_daemon(oop java_thread) { 1789 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false); 1790 } 1791 1792 1793 void java_lang_Thread::set_daemon(oop java_thread) { 1794 SET_FIELDHOLDER_FIELD(java_thread, daemon, true); 1795 } 1796 1797 oop java_lang_Thread::context_class_loader(oop java_thread) { 1798 return java_thread->obj_field(_contextClassLoader_offset); 1799 } 1800 1801 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1802 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1803 } 1804 1805 1806 jlong java_lang_Thread::stackSize(oop java_thread) { 1807 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0); 1808 } 1809 1810 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1811 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) { 1812 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status); 1813 } 1814 1815 // Read thread status value from threadStatus field in java.lang.Thread java class. 1816 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1817 // Make sure the caller is operating on behalf of the VM or is 1818 // running VM code (state == _thread_in_vm). 1819 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1820 JavaThread::current()->thread_state() == _thread_in_vm, 1821 "Java Thread is not running in vm"); 1822 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */); 1823 } 1824 1825 ByteSize java_lang_Thread::thread_id_offset() { 1826 return in_ByteSize(_tid_offset); 1827 } 1828 1829 oop java_lang_Thread::park_blocker(oop java_thread) { 1830 return java_thread->obj_field(_park_blocker_offset); 1831 } 1832 1833 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) { 1834 ThreadsListHandle tlh(JavaThread::current()); 1835 JavaThread* thread; 1836 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread); 1837 if (is_virtual) { 1838 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread); 1839 if (carrier_thread == nullptr) { 1840 return nullptr; 1841 } 1842 thread = java_lang_Thread::thread(carrier_thread); 1843 } else { 1844 thread = java_lang_Thread::thread(java_thread); 1845 } 1846 if (thread == nullptr) { 1847 return nullptr; 1848 } 1849 1850 class GetStackTraceClosure : public HandshakeClosure { 1851 public: 1852 const Handle _java_thread; 1853 int _depth; 1854 bool _retry_handshake; 1855 GrowableArray<Method*>* _methods; 1856 GrowableArray<int>* _bcis; 1857 1858 GetStackTraceClosure(Handle java_thread) : 1859 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false), 1860 _methods(nullptr), _bcis(nullptr) { 1861 } 1862 ~GetStackTraceClosure() { 1863 delete _methods; 1864 delete _bcis; 1865 } 1866 1867 bool read_reset_retry() { 1868 bool ret = _retry_handshake; 1869 // If we re-execute the handshake this method need to return false 1870 // when the handshake cannot be performed. (E.g. thread terminating) 1871 _retry_handshake = false; 1872 return ret; 1873 } 1874 1875 void do_thread(Thread* th) { 1876 if (!Thread::current()->is_Java_thread()) { 1877 _retry_handshake = true; 1878 return; 1879 } 1880 1881 JavaThread* thread = JavaThread::cast(th); 1882 1883 if (!thread->has_last_Java_frame()) { 1884 return; 1885 } 1886 1887 bool carrier = false; 1888 if (java_lang_VirtualThread::is_instance(_java_thread())) { 1889 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread 1890 const ContinuationEntry* ce = thread->vthread_continuation(); 1891 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) { 1892 return; // not mounted 1893 } 1894 } else { 1895 carrier = (thread->vthread_continuation() != nullptr); 1896 } 1897 1898 const int max_depth = MaxJavaStackTraceDepth; 1899 const bool skip_hidden = !ShowHiddenFrames; 1900 1901 // Pick minimum length that will cover most cases 1902 int init_length = 64; 1903 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal); 1904 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal); 1905 1906 int total_count = 0; 1907 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops 1908 !vfst.at_end() && (max_depth == 0 || max_depth != total_count); 1909 vfst.next()) { 1910 1911 if (skip_hidden && (vfst.method()->is_hidden() || 1912 vfst.method()->is_continuation_enter_intrinsic())) { 1913 continue; 1914 } 1915 1916 _methods->push(vfst.method()); 1917 _bcis->push(vfst.bci()); 1918 total_count++; 1919 } 1920 1921 _depth = total_count; 1922 } 1923 }; 1924 1925 // Handshake with target 1926 ResourceMark rm(THREAD); 1927 HandleMark hm(THREAD); 1928 GetStackTraceClosure gstc(Handle(THREAD, java_thread)); 1929 do { 1930 Handshake::execute(&gstc, &tlh, thread); 1931 } while (gstc.read_reset_retry()); 1932 1933 // Stop if no stack trace is found. 1934 if (gstc._depth == 0) { 1935 return nullptr; 1936 } 1937 1938 // Convert to StackTraceElement array 1939 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 1940 assert(k != nullptr, "must be loaded in 1.4+"); 1941 if (k->should_be_initialized()) { 1942 k->initialize(CHECK_NULL); 1943 } 1944 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL); 1945 1946 for (int i = 0; i < gstc._depth; i++) { 1947 methodHandle method(THREAD, gstc._methods->at(i)); 1948 oop element = java_lang_StackTraceElement::create(method, 1949 gstc._bcis->at(i), 1950 CHECK_NULL); 1951 trace->obj_at_put(i, element); 1952 } 1953 1954 return trace(); 1955 } 1956 1957 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1958 JavaThreadStatus status = get_thread_status(java_thread); 1959 switch (status) { 1960 case JavaThreadStatus::NEW : return "NEW"; 1961 case JavaThreadStatus::RUNNABLE : return "RUNNABLE"; 1962 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)"; 1963 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1964 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1965 case JavaThreadStatus::PARKED : return "WAITING (parking)"; 1966 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)"; 1967 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1968 case JavaThreadStatus::TERMINATED : return "TERMINATED"; 1969 default : return "UNKNOWN"; 1970 }; 1971 } 1972 int java_lang_ThreadGroup::_parent_offset; 1973 int java_lang_ThreadGroup::_name_offset; 1974 int java_lang_ThreadGroup::_maxPriority_offset; 1975 int java_lang_ThreadGroup::_daemon_offset; 1976 1977 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1978 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1979 return java_thread_group->obj_field(_parent_offset); 1980 } 1981 1982 // ("name as oop" accessor is not necessary) 1983 1984 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1985 oop name = java_thread_group->obj_field(_name_offset); 1986 // ThreadGroup.name can be null 1987 if (name != nullptr) { 1988 return java_lang_String::as_utf8_string(name); 1989 } 1990 return nullptr; 1991 } 1992 1993 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1994 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1995 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1996 } 1997 1998 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1999 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 2000 return java_thread_group->bool_field(_daemon_offset) != 0; 2001 } 2002 2003 #define THREADGROUP_FIELDS_DO(macro) \ 2004 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \ 2005 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2006 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \ 2007 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); 2008 2009 void java_lang_ThreadGroup::compute_offsets() { 2010 assert(_parent_offset == 0, "offsets should be initialized only once"); 2011 2012 InstanceKlass* k = vmClasses::ThreadGroup_klass(); 2013 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2014 } 2015 2016 #if INCLUDE_CDS 2017 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) { 2018 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2019 } 2020 #endif 2021 2022 2023 // java_lang_VirtualThread 2024 2025 int java_lang_VirtualThread::static_vthread_scope_offset; 2026 int java_lang_VirtualThread::_carrierThread_offset; 2027 int java_lang_VirtualThread::_continuation_offset; 2028 int java_lang_VirtualThread::_state_offset; 2029 2030 #define VTHREAD_FIELDS_DO(macro) \ 2031 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \ 2032 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \ 2033 macro(_continuation_offset, k, "cont", continuation_signature, false); \ 2034 macro(_state_offset, k, "state", int_signature, false) 2035 2036 2037 void java_lang_VirtualThread::compute_offsets() { 2038 InstanceKlass* k = vmClasses::VirtualThread_klass(); 2039 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2040 } 2041 2042 bool java_lang_VirtualThread::is_instance(oop obj) { 2043 return obj != nullptr && is_subclass(obj->klass()); 2044 } 2045 2046 oop java_lang_VirtualThread::carrier_thread(oop vthread) { 2047 oop thread = vthread->obj_field(_carrierThread_offset); 2048 return thread; 2049 } 2050 2051 oop java_lang_VirtualThread::continuation(oop vthread) { 2052 oop cont = vthread->obj_field(_continuation_offset); 2053 return cont; 2054 } 2055 2056 int java_lang_VirtualThread::state(oop vthread) { 2057 return vthread->int_field_acquire(_state_offset); 2058 } 2059 2060 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) { 2061 JavaThreadStatus status = JavaThreadStatus::NEW; 2062 switch (state) { 2063 case NEW : 2064 status = JavaThreadStatus::NEW; 2065 break; 2066 case STARTED : 2067 case RUNNABLE : 2068 case RUNNABLE_SUSPENDED : 2069 case RUNNING : 2070 case PARKING : 2071 case YIELDING : 2072 status = JavaThreadStatus::RUNNABLE; 2073 break; 2074 case PARKED : 2075 case PARKED_SUSPENDED : 2076 case PINNED : 2077 status = JavaThreadStatus::PARKED; 2078 break; 2079 case TERMINATED : 2080 status = JavaThreadStatus::TERMINATED; 2081 break; 2082 default: 2083 ShouldNotReachHere(); 2084 } 2085 return status; 2086 } 2087 2088 #if INCLUDE_CDS 2089 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) { 2090 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2091 } 2092 #endif 2093 2094 // java_lang_Throwable 2095 2096 int java_lang_Throwable::_backtrace_offset; 2097 int java_lang_Throwable::_detailMessage_offset; 2098 int java_lang_Throwable::_stackTrace_offset; 2099 int java_lang_Throwable::_depth_offset; 2100 int java_lang_Throwable::_cause_offset; 2101 int java_lang_Throwable::_static_unassigned_stacktrace_offset; 2102 2103 #define THROWABLE_FIELDS_DO(macro) \ 2104 macro(_backtrace_offset, k, "backtrace", object_signature, false); \ 2105 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \ 2106 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 2107 macro(_depth_offset, k, "depth", int_signature, false); \ 2108 macro(_cause_offset, k, "cause", throwable_signature, false); \ 2109 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 2110 2111 void java_lang_Throwable::compute_offsets() { 2112 InstanceKlass* k = vmClasses::Throwable_klass(); 2113 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2114 } 2115 2116 #if INCLUDE_CDS 2117 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) { 2118 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2119 } 2120 #endif 2121 2122 oop java_lang_Throwable::unassigned_stacktrace() { 2123 InstanceKlass* ik = vmClasses::Throwable_klass(); 2124 oop base = ik->static_field_base_raw(); 2125 return base->obj_field(_static_unassigned_stacktrace_offset); 2126 } 2127 2128 oop java_lang_Throwable::backtrace(oop throwable) { 2129 return throwable->obj_field_acquire(_backtrace_offset); 2130 } 2131 2132 2133 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 2134 throwable->release_obj_field_put(_backtrace_offset, value); 2135 } 2136 2137 int java_lang_Throwable::depth(oop throwable) { 2138 return throwable->int_field(_depth_offset); 2139 } 2140 2141 void java_lang_Throwable::set_depth(oop throwable, int value) { 2142 throwable->int_field_put(_depth_offset, value); 2143 } 2144 2145 oop java_lang_Throwable::message(oop throwable) { 2146 return throwable->obj_field(_detailMessage_offset); 2147 } 2148 2149 oop java_lang_Throwable::cause(oop throwable) { 2150 return throwable->obj_field(_cause_offset); 2151 } 2152 2153 // Return Symbol for detailed_message or null 2154 Symbol* java_lang_Throwable::detail_message(oop throwable) { 2155 PreserveExceptionMark pm(Thread::current()); 2156 oop detailed_message = java_lang_Throwable::message(throwable); 2157 if (detailed_message != nullptr) { 2158 return java_lang_String::as_symbol(detailed_message); 2159 } 2160 return nullptr; 2161 } 2162 2163 void java_lang_Throwable::set_message(oop throwable, oop value) { 2164 throwable->obj_field_put(_detailMessage_offset, value); 2165 } 2166 2167 2168 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 2169 throwable->obj_field_put(_stackTrace_offset, st_element_array); 2170 } 2171 2172 void java_lang_Throwable::clear_stacktrace(oop throwable) { 2173 set_stacktrace(throwable, nullptr); 2174 } 2175 2176 2177 void java_lang_Throwable::print(oop throwable, outputStream* st) { 2178 ResourceMark rm; 2179 Klass* k = throwable->klass(); 2180 assert(k != nullptr, "just checking"); 2181 st->print("%s", k->external_name()); 2182 oop msg = message(throwable); 2183 if (msg != nullptr) { 2184 st->print(": %s", java_lang_String::as_utf8_string(msg)); 2185 } 2186 } 2187 2188 // After this many redefines, the stack trace is unreliable. 2189 const int MAX_VERSION = USHRT_MAX; 2190 2191 static inline bool version_matches(Method* method, int version) { 2192 assert(version < MAX_VERSION, "version is too big"); 2193 return method != nullptr && (method->constants()->version() == version); 2194 } 2195 2196 // This class provides a simple wrapper over the internal structure of 2197 // exception backtrace to insulate users of the backtrace from needing 2198 // to know what it looks like. 2199 // The code of this class is not GC safe. Allocations can only happen 2200 // in expand(). 2201 class BacktraceBuilder: public StackObj { 2202 friend class BacktraceIterator; 2203 private: 2204 Handle _backtrace; 2205 objArrayOop _head; 2206 typeArrayOop _methods; 2207 typeArrayOop _bcis; 2208 objArrayOop _mirrors; 2209 typeArrayOop _names; // Needed to insulate method name against redefinition. 2210 // True if the top frame of the backtrace is omitted because it shall be hidden. 2211 bool _has_hidden_top_frame; 2212 int _index; 2213 NoSafepointVerifier _nsv; 2214 2215 enum { 2216 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 2217 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 2218 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 2219 trace_names_offset = java_lang_Throwable::trace_names_offset, 2220 trace_conts_offset = java_lang_Throwable::trace_conts_offset, 2221 trace_next_offset = java_lang_Throwable::trace_next_offset, 2222 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset, 2223 trace_size = java_lang_Throwable::trace_size, 2224 trace_chunk_size = java_lang_Throwable::trace_chunk_size 2225 }; 2226 2227 // get info out of chunks 2228 static typeArrayOop get_methods(objArrayHandle chunk) { 2229 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 2230 assert(methods != nullptr, "method array should be initialized in backtrace"); 2231 return methods; 2232 } 2233 static typeArrayOop get_bcis(objArrayHandle chunk) { 2234 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 2235 assert(bcis != nullptr, "bci array should be initialized in backtrace"); 2236 return bcis; 2237 } 2238 static objArrayOop get_mirrors(objArrayHandle chunk) { 2239 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 2240 assert(mirrors != nullptr, "mirror array should be initialized in backtrace"); 2241 return mirrors; 2242 } 2243 static typeArrayOop get_names(objArrayHandle chunk) { 2244 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 2245 assert(names != nullptr, "names array should be initialized in backtrace"); 2246 return names; 2247 } 2248 static bool has_hidden_top_frame(objArrayHandle chunk) { 2249 oop hidden = chunk->obj_at(trace_hidden_offset); 2250 return hidden != nullptr; 2251 } 2252 2253 public: 2254 2255 // constructor for new backtrace 2256 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) { 2257 expand(CHECK); 2258 _backtrace = Handle(THREAD, _head); 2259 _index = 0; 2260 } 2261 2262 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 2263 _methods = get_methods(backtrace); 2264 _bcis = get_bcis(backtrace); 2265 _mirrors = get_mirrors(backtrace); 2266 _names = get_names(backtrace); 2267 _has_hidden_top_frame = has_hidden_top_frame(backtrace); 2268 assert(_methods->length() == _bcis->length() && 2269 _methods->length() == _mirrors->length() && 2270 _mirrors->length() == _names->length(), 2271 "method and source information arrays should match"); 2272 2273 // head is the preallocated backtrace 2274 _head = backtrace(); 2275 _backtrace = Handle(thread, _head); 2276 _index = 0; 2277 } 2278 2279 void expand(TRAPS) { 2280 objArrayHandle old_head(THREAD, _head); 2281 PauseNoSafepointVerifier pnsv(&_nsv); 2282 2283 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2284 objArrayHandle new_head(THREAD, head); 2285 2286 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2287 typeArrayHandle new_methods(THREAD, methods); 2288 2289 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2290 typeArrayHandle new_bcis(THREAD, bcis); 2291 2292 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2293 objArrayHandle new_mirrors(THREAD, mirrors); 2294 2295 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2296 typeArrayHandle new_names(THREAD, names); 2297 2298 if (!old_head.is_null()) { 2299 old_head->obj_at_put(trace_next_offset, new_head()); 2300 } 2301 new_head->obj_at_put(trace_methods_offset, new_methods()); 2302 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2303 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2304 new_head->obj_at_put(trace_names_offset, new_names()); 2305 new_head->obj_at_put(trace_hidden_offset, nullptr); 2306 2307 _head = new_head(); 2308 _methods = new_methods(); 2309 _bcis = new_bcis(); 2310 _mirrors = new_mirrors(); 2311 _names = new_names(); 2312 _index = 0; 2313 } 2314 2315 oop backtrace() { 2316 return _backtrace(); 2317 } 2318 2319 inline void push(Method* method, int bci, TRAPS) { 2320 // Smear the -1 bci to 0 since the array only holds unsigned 2321 // shorts. The later line number lookup would just smear the -1 2322 // to a 0 even if it could be recorded. 2323 if (bci == SynchronizationEntryBCI) bci = 0; 2324 2325 if (_index >= trace_chunk_size) { 2326 methodHandle mhandle(THREAD, method); 2327 expand(CHECK); 2328 method = mhandle(); 2329 } 2330 2331 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2332 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2333 2334 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2335 // klass owning the symbols alive so their refcounts aren't decremented. 2336 Symbol* name = method->name(); 2337 _names->symbol_at_put(_index, name); 2338 2339 // We need to save the mirrors in the backtrace to keep the class 2340 // from being unloaded while we still have this stack trace. 2341 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror"); 2342 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2343 2344 _index++; 2345 } 2346 2347 void set_has_hidden_top_frame() { 2348 if (!_has_hidden_top_frame) { 2349 // It would be nice to add java/lang/Boolean::TRUE here 2350 // to indicate that this backtrace has a hidden top frame. 2351 // But this code is used before TRUE is allocated. 2352 // Therefore let's just use an arbitrary legal oop 2353 // available right here. _methods is a short[]. 2354 assert(_methods != nullptr, "we need a legal oop"); 2355 _has_hidden_top_frame = true; 2356 _head->obj_at_put(trace_hidden_offset, _methods); 2357 } 2358 } 2359 }; 2360 2361 struct BacktraceElement : public StackObj { 2362 int _method_id; 2363 int _bci; 2364 int _version; 2365 Symbol* _name; 2366 Handle _mirror; 2367 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2368 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {} 2369 }; 2370 2371 class BacktraceIterator : public StackObj { 2372 int _index; 2373 objArrayHandle _result; 2374 objArrayHandle _mirrors; 2375 typeArrayHandle _methods; 2376 typeArrayHandle _bcis; 2377 typeArrayHandle _names; 2378 2379 void init(objArrayHandle result, Thread* thread) { 2380 // Get method id, bci, version and mirror from chunk 2381 _result = result; 2382 if (_result.not_null()) { 2383 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2384 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2385 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2386 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2387 _index = 0; 2388 } 2389 } 2390 public: 2391 BacktraceIterator(objArrayHandle result, Thread* thread) { 2392 init(result, thread); 2393 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2394 } 2395 2396 BacktraceElement next(Thread* thread) { 2397 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2398 _methods->ushort_at(_index), 2399 Backtrace::version_at(_bcis->int_at(_index)), 2400 Backtrace::bci_at(_bcis->int_at(_index)), 2401 _names->symbol_at(_index)); 2402 _index++; 2403 2404 if (_index >= java_lang_Throwable::trace_chunk_size) { 2405 int next_offset = java_lang_Throwable::trace_next_offset; 2406 // Get next chunk 2407 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2408 init(result, thread); 2409 } 2410 return e; 2411 } 2412 2413 bool repeat() { 2414 return _result.not_null() && _mirrors->obj_at(_index) != nullptr; 2415 } 2416 }; 2417 2418 2419 // Print stack trace element to resource allocated buffer 2420 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 2421 int version, int bci, Symbol* name) { 2422 ResourceMark rm; 2423 2424 // Get strings and string lengths 2425 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2426 const char* klass_name = holder->external_name(); 2427 int buf_len = (int)strlen(klass_name); 2428 2429 char* method_name = name->as_C_string(); 2430 buf_len += (int)strlen(method_name); 2431 2432 char* source_file_name = nullptr; 2433 Symbol* source = Backtrace::get_source_file_name(holder, version); 2434 if (source != nullptr) { 2435 source_file_name = source->as_C_string(); 2436 buf_len += (int)strlen(source_file_name); 2437 } 2438 2439 char *module_name = nullptr, *module_version = nullptr; 2440 ModuleEntry* module = holder->module(); 2441 if (module->is_named()) { 2442 module_name = module->name()->as_C_string(); 2443 buf_len += (int)strlen(module_name); 2444 if (module->version() != nullptr) { 2445 module_version = module->version()->as_C_string(); 2446 buf_len += (int)strlen(module_version); 2447 } 2448 } 2449 2450 // Allocate temporary buffer with extra space for formatting and line number 2451 const size_t buf_size = buf_len + 64; 2452 char* buf = NEW_RESOURCE_ARRAY(char, buf_size); 2453 2454 // Print stack trace line in buffer 2455 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name); 2456 2457 // Print module information 2458 if (module_name != nullptr) { 2459 if (module_version != nullptr) { 2460 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version); 2461 } else { 2462 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name); 2463 } 2464 } 2465 2466 // The method can be null if the requested class version is gone 2467 Method* method = holder->method_with_orig_idnum(method_id, version); 2468 if (!version_matches(method, version)) { 2469 strcat(buf, "Redefined)"); 2470 } else { 2471 int line_number = Backtrace::get_line_number(method, bci); 2472 if (line_number == -2) { 2473 strcat(buf, "Native Method)"); 2474 } else { 2475 if (source_file_name != nullptr && (line_number != -1)) { 2476 // Sourcename and linenumber 2477 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number); 2478 } else if (source_file_name != nullptr) { 2479 // Just sourcename 2480 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name); 2481 } else { 2482 // Neither sourcename nor linenumber 2483 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)"); 2484 } 2485 CompiledMethod* nm = method->code(); 2486 if (WizardMode && nm != nullptr) { 2487 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 2488 } 2489 } 2490 } 2491 2492 st->print_cr("%s", buf); 2493 } 2494 2495 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) { 2496 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 2497 int method_id = method->orig_method_idnum(); 2498 int version = method->constants()->version(); 2499 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 2500 } 2501 2502 /** 2503 * Print the throwable message and its stack trace plus all causes by walking the 2504 * cause chain. The output looks the same as of Throwable.printStackTrace(). 2505 */ 2506 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 2507 // First, print the message. 2508 print(throwable(), st); 2509 st->cr(); 2510 2511 // Now print the stack trace. 2512 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2513 while (throwable.not_null()) { 2514 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 2515 if (result.is_null()) { 2516 st->print_raw_cr("\t<<no stack trace available>>"); 2517 return; 2518 } 2519 BacktraceIterator iter(result, THREAD); 2520 2521 while (iter.repeat()) { 2522 BacktraceElement bte = iter.next(THREAD); 2523 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 2524 } 2525 { 2526 // Call getCause() which doesn't necessarily return the _cause field. 2527 ExceptionMark em(THREAD); 2528 JavaValue cause(T_OBJECT); 2529 JavaCalls::call_virtual(&cause, 2530 throwable, 2531 throwable->klass(), 2532 vmSymbols::getCause_name(), 2533 vmSymbols::void_throwable_signature(), 2534 THREAD); 2535 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 2536 if (HAS_PENDING_EXCEPTION) { 2537 CLEAR_PENDING_EXCEPTION; 2538 throwable = Handle(); 2539 } else { 2540 throwable = Handle(THREAD, cause.get_oop()); 2541 if (throwable.not_null()) { 2542 st->print("Caused by: "); 2543 print(throwable(), st); 2544 st->cr(); 2545 } 2546 } 2547 } 2548 } 2549 } 2550 2551 /** 2552 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 2553 */ 2554 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 2555 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected"); 2556 JavaValue result(T_VOID); 2557 JavaCalls::call_virtual(&result, 2558 throwable, 2559 vmClasses::Throwable_klass(), 2560 vmSymbols::printStackTrace_name(), 2561 vmSymbols::void_method_signature(), 2562 THREAD); 2563 } 2564 2565 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 2566 if (!StackTraceInThrowable) return; 2567 ResourceMark rm(THREAD); 2568 2569 // Start out by clearing the backtrace for this object, in case the VM 2570 // runs out of memory while allocating the stack trace 2571 set_backtrace(throwable(), nullptr); 2572 // Clear lazily constructed Java level stacktrace if refilling occurs 2573 // This is unnecessary in 1.7+ but harmless 2574 clear_stacktrace(throwable()); 2575 2576 int max_depth = MaxJavaStackTraceDepth; 2577 JavaThread* thread = THREAD; 2578 2579 BacktraceBuilder bt(CHECK); 2580 2581 // If there is no Java frame just return the method that was being called 2582 // with bci 0 2583 if (!thread->has_last_Java_frame()) { 2584 if (max_depth >= 1 && method() != nullptr) { 2585 bt.push(method(), 0, CHECK); 2586 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 2587 set_depth(throwable(), 1); 2588 set_backtrace(throwable(), bt.backtrace()); 2589 } 2590 return; 2591 } 2592 2593 // Instead of using vframe directly, this version of fill_in_stack_trace 2594 // basically handles everything by hand. This significantly improved the 2595 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 2596 // See bug 6333838 for more details. 2597 // The "ASSERT" here is to verify this method generates the exactly same stack 2598 // trace as utilizing vframe. 2599 #ifdef ASSERT 2600 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */); 2601 #endif 2602 int total_count = 0; 2603 RegisterMap map(thread, 2604 RegisterMap::UpdateMap::skip, 2605 RegisterMap::ProcessFrames::skip, 2606 RegisterMap::WalkContinuation::include); 2607 int decode_offset = 0; 2608 CompiledMethod* nm = nullptr; 2609 bool skip_fillInStackTrace_check = false; 2610 bool skip_throwableInit_check = false; 2611 bool skip_hidden = !ShowHiddenFrames; 2612 bool show_carrier = ShowCarrierFrames; 2613 ContinuationEntry* cont_entry = thread->last_continuation(); 2614 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 2615 Method* method = nullptr; 2616 int bci = 0; 2617 2618 // Compiled java method case. 2619 if (decode_offset != 0) { 2620 DebugInfoReadStream stream(nm, decode_offset); 2621 decode_offset = stream.read_int(); 2622 method = (Method*)nm->metadata_at(stream.read_int()); 2623 bci = stream.read_bci(); 2624 } else { 2625 if (fr.is_first_frame()) break; 2626 2627 if (Continuation::is_continuation_enterSpecial(fr)) { 2628 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), ""); 2629 if (!show_carrier && cont_entry->is_virtual_thread()) { 2630 break; 2631 } 2632 cont_entry = cont_entry->parent(); 2633 } 2634 2635 address pc = fr.pc(); 2636 if (fr.is_interpreted_frame()) { 2637 address bcp; 2638 if (!map.in_cont()) { 2639 bcp = fr.interpreter_frame_bcp(); 2640 method = fr.interpreter_frame_method(); 2641 } else { 2642 bcp = map.stack_chunk()->interpreter_frame_bcp(fr); 2643 method = map.stack_chunk()->interpreter_frame_method(fr); 2644 } 2645 bci = method->bci_from(bcp); 2646 fr = fr.sender(&map); 2647 } else { 2648 CodeBlob* cb = fr.cb(); 2649 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null 2650 // but non nmethod 2651 fr = fr.sender(&map); 2652 if (cb == nullptr || !cb->is_compiled()) { 2653 continue; 2654 } 2655 nm = cb->as_compiled_method(); 2656 assert(nm->method() != nullptr, "must be"); 2657 if (nm->method()->is_native()) { 2658 method = nm->method(); 2659 bci = 0; 2660 } else { 2661 PcDesc* pd = nm->pc_desc_at(pc); 2662 decode_offset = pd->scope_decode_offset(); 2663 // if decode_offset is not equal to 0, it will execute the 2664 // "compiled java method case" at the beginning of the loop. 2665 continue; 2666 } 2667 } 2668 } 2669 #ifdef ASSERT 2670 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace 2671 assert(st.method() == method && st.bci() == bci, "Wrong stack trace"); 2672 st.next(); 2673 } 2674 #endif 2675 2676 // the format of the stacktrace will be: 2677 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2678 // - 0 or more <init> methods for the exception class (skipped) 2679 // - rest of the stack 2680 2681 if (!skip_fillInStackTrace_check) { 2682 if (method->name() == vmSymbols::fillInStackTrace_name() && 2683 throwable->is_a(method->method_holder())) { 2684 continue; 2685 } 2686 else { 2687 skip_fillInStackTrace_check = true; // gone past them all 2688 } 2689 } 2690 if (!skip_throwableInit_check) { 2691 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2692 2693 // skip <init> methods of the exception class and superclasses 2694 // This is similar to classic VM. 2695 if (method->is_object_constructor() && 2696 throwable->is_a(method->method_holder())) { 2697 continue; 2698 } else { 2699 // there are none or we've seen them all - either way stop checking 2700 skip_throwableInit_check = true; 2701 } 2702 } 2703 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) { 2704 if (skip_hidden) { 2705 if (total_count == 0) { 2706 // The top frame will be hidden from the stack trace. 2707 bt.set_has_hidden_top_frame(); 2708 } 2709 continue; 2710 } 2711 } 2712 2713 bt.push(method, bci, CHECK); 2714 total_count++; 2715 } 2716 2717 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2718 2719 // Put completed stack trace into throwable object 2720 set_backtrace(throwable(), bt.backtrace()); 2721 set_depth(throwable(), total_count); 2722 } 2723 2724 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2725 // No-op if stack trace is disabled 2726 if (!StackTraceInThrowable) { 2727 return; 2728 } 2729 2730 // Disable stack traces for some preallocated out of memory errors 2731 if (!Universe::should_fill_in_stack_trace(throwable)) { 2732 return; 2733 } 2734 2735 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2736 PreserveExceptionMark pm(THREAD); 2737 2738 fill_in_stack_trace(throwable, method, THREAD); 2739 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the 2740 // original exception via the PreserveExceptionMark destructor. 2741 CLEAR_PENDING_EXCEPTION; 2742 } 2743 2744 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2745 // Allocate stack trace - backtrace is created but not filled in 2746 2747 // No-op if stack trace is disabled 2748 if (!StackTraceInThrowable) return; 2749 BacktraceBuilder bt(CHECK); // creates a backtrace 2750 set_backtrace(throwable(), bt.backtrace()); 2751 } 2752 2753 2754 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2755 // Fill in stack trace into preallocated backtrace (no GC) 2756 2757 // No-op if stack trace is disabled 2758 if (!StackTraceInThrowable) return; 2759 2760 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check"); 2761 2762 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2763 2764 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2765 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2766 2767 ResourceMark rm(THREAD); 2768 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */); 2769 2770 BacktraceBuilder bt(THREAD, backtrace); 2771 2772 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2773 // methods as preallocated errors aren't created by "java" code. 2774 2775 // fill in as much stack trace as possible 2776 int chunk_count = 0; 2777 for (;!st.at_end(); st.next()) { 2778 bt.push(st.method(), st.bci(), CHECK); 2779 chunk_count++; 2780 2781 // Bail-out for deep stacks 2782 if (chunk_count >= trace_chunk_size) break; 2783 } 2784 set_depth(throwable(), chunk_count); 2785 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2786 2787 // We support the Throwable immutability protocol defined for Java 7. 2788 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2789 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized"); 2790 } 2791 2792 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace, 2793 objArrayHandle stack_trace_array_h, TRAPS) { 2794 2795 if (backtrace.is_null() || stack_trace_array_h.is_null()) { 2796 THROW(vmSymbols::java_lang_NullPointerException()); 2797 } 2798 2799 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2800 2801 if (stack_trace_array_h->length() != depth) { 2802 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2803 } 2804 2805 objArrayHandle result(THREAD, objArrayOop(backtrace())); 2806 BacktraceIterator iter(result, THREAD); 2807 2808 int index = 0; 2809 while (iter.repeat()) { 2810 BacktraceElement bte = iter.next(THREAD); 2811 2812 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2813 2814 if (stack_trace_element.is_null()) { 2815 THROW(vmSymbols::java_lang_NullPointerException()); 2816 } 2817 2818 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2819 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2820 2821 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2822 method, 2823 bte._version, 2824 bte._bci, 2825 bte._name, 2826 CHECK); 2827 } 2828 } 2829 2830 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) { 2831 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization 2832 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive 2833 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and 2834 // symbolic stacktrace of 'throwable'. 2835 assert(throwable.not_null(), "shouldn't be"); 2836 2837 // Now create the message from the original exception and thread name. 2838 Symbol* message = java_lang_Throwable::detail_message(throwable()); 2839 ResourceMark rm(current); 2840 stringStream st; 2841 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(), 2842 message == nullptr ? "" : ":"); 2843 if (message == nullptr) { 2844 st.print("[in thread \"%s\"]", current->name()); 2845 } else { 2846 st.print("%s [in thread \"%s\"]", message->as_C_string(), current->name()); 2847 } 2848 2849 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError(); 2850 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string()); 2851 // If new_exception returns a different exception while creating the exception, 2852 // abandon the attempt to save the initialization error and return null. 2853 if (init_error->klass()->name() != exception_name) { 2854 log_info(class, init)("Exception thrown while saving initialization exception %s", 2855 init_error->klass()->external_name()); 2856 return Handle(); 2857 } 2858 2859 // Call to java to fill in the stack trace and clear declaringClassObject to 2860 // not keep classes alive in the stack trace. 2861 // call this: public StackTraceElement[] getStackTrace() 2862 JavaValue result(T_ARRAY); 2863 JavaCalls::call_virtual(&result, throwable, 2864 vmClasses::Throwable_klass(), 2865 vmSymbols::getStackTrace_name(), 2866 vmSymbols::getStackTrace_signature(), 2867 current); 2868 if (!current->has_pending_exception()){ 2869 Handle stack_trace(current, result.get_oop()); 2870 assert(stack_trace->is_objArray(), "Should be an array"); 2871 java_lang_Throwable::set_stacktrace(init_error(), stack_trace()); 2872 // Clear backtrace because the stacktrace should be used instead. 2873 set_backtrace(init_error(), nullptr); 2874 } else { 2875 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s", 2876 init_error->klass()->external_name()); 2877 current->clear_pending_exception(); 2878 } 2879 2880 return init_error; 2881 } 2882 2883 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) { 2884 JavaThread* current = JavaThread::current(); 2885 objArrayHandle result(current, objArrayOop(backtrace(throwable))); 2886 BacktraceIterator iter(result, current); 2887 // No backtrace available. 2888 if (!iter.repeat()) return false; 2889 2890 // If the exception happened in a frame that has been hidden, i.e., 2891 // omitted from the back trace, we can not compute the message. 2892 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset); 2893 if (hidden != nullptr) { 2894 return false; 2895 } 2896 2897 // Get first backtrace element. 2898 BacktraceElement bte = iter.next(current); 2899 2900 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2901 assert(holder != nullptr, "first element should be non-null"); 2902 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version); 2903 2904 // Original version is no longer available. 2905 if (m == nullptr || !version_matches(m, bte._version)) { 2906 return false; 2907 } 2908 2909 *method = m; 2910 *bci = bte._bci; 2911 return true; 2912 } 2913 2914 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2915 // Allocate java.lang.StackTraceElement instance 2916 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 2917 assert(k != nullptr, "must be loaded in 1.4+"); 2918 if (k->should_be_initialized()) { 2919 k->initialize(CHECK_NULL); 2920 } 2921 2922 Handle element = k->allocate_instance_handle(CHECK_NULL); 2923 2924 int version = method->constants()->version(); 2925 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL); 2926 return element(); 2927 } 2928 2929 void java_lang_StackTraceElement::fill_in(Handle element, 2930 InstanceKlass* holder, const methodHandle& method, 2931 int version, int bci, Symbol* name, TRAPS) { 2932 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check"); 2933 2934 ResourceMark rm(THREAD); 2935 HandleMark hm(THREAD); 2936 2937 // Fill in class name 2938 Handle java_class(THREAD, holder->java_mirror()); 2939 oop classname = java_lang_Class::name(java_class, CHECK); 2940 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2941 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class()); 2942 2943 oop loader = holder->class_loader(); 2944 if (loader != nullptr) { 2945 oop loader_name = java_lang_ClassLoader::name(loader); 2946 if (loader_name != nullptr) 2947 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2948 } 2949 2950 // Fill in method name 2951 oop methodname = StringTable::intern(name, CHECK); 2952 java_lang_StackTraceElement::set_methodName(element(), methodname); 2953 2954 // Fill in module name and version 2955 ModuleEntry* module = holder->module(); 2956 if (module->is_named()) { 2957 oop module_name = StringTable::intern(module->name(), CHECK); 2958 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2959 oop module_version; 2960 if (module->version() != nullptr) { 2961 module_version = StringTable::intern(module->version(), CHECK); 2962 } else { 2963 module_version = nullptr; 2964 } 2965 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2966 } 2967 2968 if (method() == nullptr || !version_matches(method(), version)) { 2969 // The method was redefined, accurate line number information isn't available 2970 java_lang_StackTraceElement::set_fileName(element(), nullptr); 2971 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2972 } else { 2973 Symbol* source; 2974 oop source_file; 2975 int line_number; 2976 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK); 2977 2978 java_lang_StackTraceElement::set_fileName(element(), source_file); 2979 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2980 } 2981 } 2982 2983 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class, 2984 InstanceKlass* holder, 2985 int version, 2986 const methodHandle& method, 2987 int bci, 2988 Symbol*& source, 2989 oop& source_file, 2990 int& line_number, TRAPS) { 2991 // Fill in source file name and line number. 2992 source = Backtrace::get_source_file_name(holder, version); 2993 source_file = java_lang_Class::source_file(java_class()); 2994 if (source != nullptr) { 2995 // Class was not redefined. We can trust its cache if set, 2996 // else we have to initialize it. 2997 if (source_file == nullptr) { 2998 source_file = StringTable::intern(source, CHECK); 2999 java_lang_Class::set_source_file(java_class(), source_file); 3000 } 3001 } else { 3002 // Class was redefined. Dump the cache if it was set. 3003 if (source_file != nullptr) { 3004 source_file = nullptr; 3005 java_lang_Class::set_source_file(java_class(), source_file); 3006 } 3007 } 3008 line_number = Backtrace::get_line_number(method(), bci); 3009 } 3010 3011 #if INCLUDE_JVMCI 3012 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci, 3013 Symbol*& filename, int& line_number, TRAPS) { 3014 ResourceMark rm(THREAD); 3015 HandleMark hm(THREAD); 3016 3017 filename = nullptr; 3018 line_number = -1; 3019 3020 oop source_file; 3021 int version = method->constants()->version(); 3022 InstanceKlass* holder = method->method_holder(); 3023 Handle java_class(THREAD, holder->java_mirror()); 3024 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK); 3025 } 3026 #endif // INCLUDE_JVMCI 3027 3028 // java_lang_StackFrameInfo 3029 3030 int java_lang_StackFrameInfo::_memberName_offset; 3031 int java_lang_StackFrameInfo::_bci_offset; 3032 int java_lang_StackFrameInfo::_version_offset; 3033 int java_lang_StackFrameInfo::_contScope_offset; 3034 3035 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 3036 macro(_memberName_offset, k, "memberName", object_signature, false); \ 3037 macro(_bci_offset, k, "bci", int_signature, false); \ 3038 macro(_contScope_offset, k, "contScope", continuationscope_signature, false) 3039 3040 void java_lang_StackFrameInfo::compute_offsets() { 3041 InstanceKlass* k = vmClasses::StackFrameInfo_klass(); 3042 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3043 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3044 } 3045 3046 #if INCLUDE_CDS 3047 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) { 3048 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3049 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3050 } 3051 #endif 3052 3053 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 3054 HandleMark hm(THREAD); 3055 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 3056 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 3057 // we should expand MemberName::name when Throwable uses StackTrace 3058 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 3059 return method; 3060 } 3061 3062 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) { 3063 // set Method* or mid/cpref 3064 HandleMark hm(THREAD); 3065 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 3066 Handle cont_h (THREAD, cont); 3067 InstanceKlass* ik = method->method_holder(); 3068 CallInfo info(method(), ik, CHECK); 3069 MethodHandles::init_method_MemberName(mname, info); 3070 // set bci 3071 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 3072 // method may be redefined; store the version 3073 int version = method->constants()->version(); 3074 assert((jushort)version == version, "version should be short"); 3075 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 3076 3077 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr; 3078 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope); 3079 } 3080 3081 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 3082 ResourceMark rm(THREAD); 3083 HandleMark hm(THREAD); 3084 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset)); 3085 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname())); 3086 InstanceKlass* holder = InstanceKlass::cast(clazz); 3087 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 3088 3089 short version = stackFrame->short_field(_version_offset); 3090 int bci = stackFrame->int_field(_bci_offset); 3091 Symbol* name = method->name(); 3092 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK); 3093 } 3094 3095 void java_lang_StackFrameInfo::set_version(oop element, short value) { 3096 element->short_field_put(_version_offset, value); 3097 } 3098 3099 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 3100 assert(value >= 0 && value < max_jushort, "must be a valid bci value"); 3101 element->int_field_put(_bci_offset, value); 3102 } 3103 3104 void java_lang_StackFrameInfo::set_contScope(oop element, oop value) { 3105 element->obj_field_put(_contScope_offset, value); 3106 } 3107 3108 int java_lang_LiveStackFrameInfo::_monitors_offset; 3109 int java_lang_LiveStackFrameInfo::_locals_offset; 3110 int java_lang_LiveStackFrameInfo::_operands_offset; 3111 int java_lang_LiveStackFrameInfo::_mode_offset; 3112 3113 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 3114 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 3115 macro(_locals_offset, k, "locals", object_array_signature, false); \ 3116 macro(_operands_offset, k, "operands", object_array_signature, false); \ 3117 macro(_mode_offset, k, "mode", int_signature, false) 3118 3119 void java_lang_LiveStackFrameInfo::compute_offsets() { 3120 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass(); 3121 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3122 } 3123 3124 #if INCLUDE_CDS 3125 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) { 3126 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3127 } 3128 #endif 3129 3130 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 3131 element->obj_field_put(_monitors_offset, value); 3132 } 3133 3134 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 3135 element->obj_field_put(_locals_offset, value); 3136 } 3137 3138 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 3139 element->obj_field_put(_operands_offset, value); 3140 } 3141 3142 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) { 3143 element->int_field_put(_mode_offset, value); 3144 } 3145 3146 3147 // java_lang_AccessibleObject 3148 3149 int java_lang_reflect_AccessibleObject::_override_offset; 3150 3151 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 3152 macro(_override_offset, k, "override", bool_signature, false) 3153 3154 void java_lang_reflect_AccessibleObject::compute_offsets() { 3155 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass(); 3156 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3157 } 3158 3159 #if INCLUDE_CDS 3160 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) { 3161 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3162 } 3163 #endif 3164 3165 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 3166 return (jboolean) reflect->bool_field(_override_offset); 3167 } 3168 3169 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 3170 reflect->bool_field_put(_override_offset, (int) value); 3171 } 3172 3173 // java_lang_reflect_Method 3174 3175 int java_lang_reflect_Method::_clazz_offset; 3176 int java_lang_reflect_Method::_name_offset; 3177 int java_lang_reflect_Method::_returnType_offset; 3178 int java_lang_reflect_Method::_parameterTypes_offset; 3179 int java_lang_reflect_Method::_exceptionTypes_offset; 3180 int java_lang_reflect_Method::_slot_offset; 3181 int java_lang_reflect_Method::_modifiers_offset; 3182 int java_lang_reflect_Method::_signature_offset; 3183 int java_lang_reflect_Method::_annotations_offset; 3184 int java_lang_reflect_Method::_parameter_annotations_offset; 3185 int java_lang_reflect_Method::_annotation_default_offset; 3186 3187 #define METHOD_FIELDS_DO(macro) \ 3188 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3189 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3190 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 3191 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 3192 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 3193 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3194 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3195 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3196 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 3197 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \ 3198 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false); 3199 3200 void java_lang_reflect_Method::compute_offsets() { 3201 InstanceKlass* k = vmClasses::reflect_Method_klass(); 3202 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3203 } 3204 3205 #if INCLUDE_CDS 3206 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) { 3207 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3208 } 3209 #endif 3210 3211 Handle java_lang_reflect_Method::create(TRAPS) { 3212 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3213 Klass* klass = vmClasses::reflect_Method_klass(); 3214 // This class is eagerly initialized during VM initialization, since we keep a reference 3215 // to one of the methods 3216 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 3217 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 3218 } 3219 3220 oop java_lang_reflect_Method::clazz(oop reflect) { 3221 return reflect->obj_field(_clazz_offset); 3222 } 3223 3224 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 3225 reflect->obj_field_put(_clazz_offset, value); 3226 } 3227 3228 int java_lang_reflect_Method::slot(oop reflect) { 3229 return reflect->int_field(_slot_offset); 3230 } 3231 3232 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 3233 reflect->int_field_put(_slot_offset, value); 3234 } 3235 3236 void java_lang_reflect_Method::set_name(oop method, oop value) { 3237 method->obj_field_put(_name_offset, value); 3238 } 3239 3240 oop java_lang_reflect_Method::return_type(oop method) { 3241 return method->obj_field(_returnType_offset); 3242 } 3243 3244 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 3245 method->obj_field_put(_returnType_offset, value); 3246 } 3247 3248 oop java_lang_reflect_Method::parameter_types(oop method) { 3249 return method->obj_field(_parameterTypes_offset); 3250 } 3251 3252 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 3253 method->obj_field_put(_parameterTypes_offset, value); 3254 } 3255 3256 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 3257 method->obj_field_put(_exceptionTypes_offset, value); 3258 } 3259 3260 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 3261 method->int_field_put(_modifiers_offset, value); 3262 } 3263 3264 void java_lang_reflect_Method::set_signature(oop method, oop value) { 3265 method->obj_field_put(_signature_offset, value); 3266 } 3267 3268 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 3269 method->obj_field_put(_annotations_offset, value); 3270 } 3271 3272 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 3273 method->obj_field_put(_parameter_annotations_offset, value); 3274 } 3275 3276 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 3277 method->obj_field_put(_annotation_default_offset, value); 3278 } 3279 3280 int java_lang_reflect_Constructor::_clazz_offset; 3281 int java_lang_reflect_Constructor::_parameterTypes_offset; 3282 int java_lang_reflect_Constructor::_exceptionTypes_offset; 3283 int java_lang_reflect_Constructor::_slot_offset; 3284 int java_lang_reflect_Constructor::_modifiers_offset; 3285 int java_lang_reflect_Constructor::_signature_offset; 3286 int java_lang_reflect_Constructor::_annotations_offset; 3287 int java_lang_reflect_Constructor::_parameter_annotations_offset; 3288 3289 #define CONSTRUCTOR_FIELDS_DO(macro) \ 3290 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3291 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 3292 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 3293 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3294 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3295 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3296 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 3297 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); 3298 3299 void java_lang_reflect_Constructor::compute_offsets() { 3300 InstanceKlass* k = vmClasses::reflect_Constructor_klass(); 3301 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3302 } 3303 3304 #if INCLUDE_CDS 3305 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) { 3306 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3307 } 3308 #endif 3309 3310 Handle java_lang_reflect_Constructor::create(TRAPS) { 3311 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3312 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 3313 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3314 InstanceKlass* ik = InstanceKlass::cast(k); 3315 // Ensure it is initialized 3316 ik->initialize(CHECK_NH); 3317 return ik->allocate_instance_handle(THREAD); 3318 } 3319 3320 oop java_lang_reflect_Constructor::clazz(oop reflect) { 3321 return reflect->obj_field(_clazz_offset); 3322 } 3323 3324 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 3325 reflect->obj_field_put(_clazz_offset, value); 3326 } 3327 3328 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 3329 return constructor->obj_field(_parameterTypes_offset); 3330 } 3331 3332 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 3333 constructor->obj_field_put(_parameterTypes_offset, value); 3334 } 3335 3336 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 3337 constructor->obj_field_put(_exceptionTypes_offset, value); 3338 } 3339 3340 int java_lang_reflect_Constructor::slot(oop reflect) { 3341 return reflect->int_field(_slot_offset); 3342 } 3343 3344 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 3345 reflect->int_field_put(_slot_offset, value); 3346 } 3347 3348 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 3349 constructor->int_field_put(_modifiers_offset, value); 3350 } 3351 3352 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 3353 constructor->obj_field_put(_signature_offset, value); 3354 } 3355 3356 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 3357 constructor->obj_field_put(_annotations_offset, value); 3358 } 3359 3360 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 3361 method->obj_field_put(_parameter_annotations_offset, value); 3362 } 3363 3364 int java_lang_reflect_Field::_clazz_offset; 3365 int java_lang_reflect_Field::_name_offset; 3366 int java_lang_reflect_Field::_type_offset; 3367 int java_lang_reflect_Field::_slot_offset; 3368 int java_lang_reflect_Field::_modifiers_offset; 3369 int java_lang_reflect_Field::_trusted_final_offset; 3370 int java_lang_reflect_Field::_signature_offset; 3371 int java_lang_reflect_Field::_annotations_offset; 3372 3373 #define FIELD_FIELDS_DO(macro) \ 3374 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3375 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3376 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \ 3377 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3378 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3379 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \ 3380 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3381 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); 3382 3383 void java_lang_reflect_Field::compute_offsets() { 3384 InstanceKlass* k = vmClasses::reflect_Field_klass(); 3385 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3386 } 3387 3388 #if INCLUDE_CDS 3389 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) { 3390 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3391 } 3392 #endif 3393 3394 Handle java_lang_reflect_Field::create(TRAPS) { 3395 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3396 Symbol* name = vmSymbols::java_lang_reflect_Field(); 3397 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3398 InstanceKlass* ik = InstanceKlass::cast(k); 3399 // Ensure it is initialized 3400 ik->initialize(CHECK_NH); 3401 return ik->allocate_instance_handle(THREAD); 3402 } 3403 3404 oop java_lang_reflect_Field::clazz(oop reflect) { 3405 return reflect->obj_field(_clazz_offset); 3406 } 3407 3408 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 3409 reflect->obj_field_put(_clazz_offset, value); 3410 } 3411 3412 oop java_lang_reflect_Field::name(oop field) { 3413 return field->obj_field(_name_offset); 3414 } 3415 3416 void java_lang_reflect_Field::set_name(oop field, oop value) { 3417 field->obj_field_put(_name_offset, value); 3418 } 3419 3420 oop java_lang_reflect_Field::type(oop field) { 3421 return field->obj_field(_type_offset); 3422 } 3423 3424 void java_lang_reflect_Field::set_type(oop field, oop value) { 3425 field->obj_field_put(_type_offset, value); 3426 } 3427 3428 int java_lang_reflect_Field::slot(oop reflect) { 3429 return reflect->int_field(_slot_offset); 3430 } 3431 3432 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 3433 reflect->int_field_put(_slot_offset, value); 3434 } 3435 3436 int java_lang_reflect_Field::modifiers(oop field) { 3437 return field->int_field(_modifiers_offset); 3438 } 3439 3440 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 3441 field->int_field_put(_modifiers_offset, value); 3442 } 3443 3444 void java_lang_reflect_Field::set_trusted_final(oop field) { 3445 field->bool_field_put(_trusted_final_offset, true); 3446 } 3447 3448 void java_lang_reflect_Field::set_signature(oop field, oop value) { 3449 field->obj_field_put(_signature_offset, value); 3450 } 3451 3452 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 3453 field->obj_field_put(_annotations_offset, value); 3454 } 3455 3456 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) { 3457 // Allocate java.lang.reflect.RecordComponent instance 3458 HandleMark hm(THREAD); 3459 InstanceKlass* ik = vmClasses::RecordComponent_klass(); 3460 assert(ik != nullptr, "must be loaded"); 3461 ik->initialize(CHECK_NULL); 3462 3463 Handle element = ik->allocate_instance_handle(CHECK_NULL); 3464 3465 Handle decl_class(THREAD, holder->java_mirror()); 3466 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class()); 3467 3468 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8 3469 oop component_name = StringTable::intern(name, CHECK_NULL); 3470 java_lang_reflect_RecordComponent::set_name(element(), component_name); 3471 3472 Symbol* type = holder->constants()->symbol_at(component->descriptor_index()); 3473 Handle component_type_h = 3474 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL); 3475 java_lang_reflect_RecordComponent::set_type(element(), component_type_h()); 3476 3477 Method* accessor_method = nullptr; 3478 { 3479 // Prepend "()" to type to create the full method signature. 3480 ResourceMark rm(THREAD); 3481 int sig_len = type->utf8_length() + 3; // "()" and null char 3482 char* sig = NEW_RESOURCE_ARRAY(char, sig_len); 3483 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string()); 3484 TempNewSymbol full_sig = SymbolTable::new_symbol(sig); 3485 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find); 3486 } 3487 3488 if (accessor_method != nullptr) { 3489 methodHandle method(THREAD, accessor_method); 3490 oop m = Reflection::new_method(method, false, CHECK_NULL); 3491 java_lang_reflect_RecordComponent::set_accessor(element(), m); 3492 } else { 3493 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr); 3494 } 3495 3496 int sig_index = component->generic_signature_index(); 3497 if (sig_index > 0) { 3498 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8 3499 oop component_sig = StringTable::intern(sig, CHECK_NULL); 3500 java_lang_reflect_RecordComponent::set_signature(element(), component_sig); 3501 } else { 3502 java_lang_reflect_RecordComponent::set_signature(element(), nullptr); 3503 } 3504 3505 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL); 3506 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop); 3507 3508 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL); 3509 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop); 3510 3511 return element(); 3512 } 3513 3514 int reflect_ConstantPool::_oop_offset; 3515 3516 #define CONSTANTPOOL_FIELDS_DO(macro) \ 3517 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 3518 3519 void reflect_ConstantPool::compute_offsets() { 3520 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass(); 3521 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3522 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3523 } 3524 3525 #if INCLUDE_CDS 3526 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) { 3527 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3528 } 3529 #endif 3530 3531 int java_lang_reflect_Parameter::_name_offset; 3532 int java_lang_reflect_Parameter::_modifiers_offset; 3533 int java_lang_reflect_Parameter::_index_offset; 3534 int java_lang_reflect_Parameter::_executable_offset; 3535 3536 #define PARAMETER_FIELDS_DO(macro) \ 3537 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3538 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3539 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3540 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3541 3542 void java_lang_reflect_Parameter::compute_offsets() { 3543 InstanceKlass* k = vmClasses::reflect_Parameter_klass(); 3544 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3545 } 3546 3547 #if INCLUDE_CDS 3548 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) { 3549 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3550 } 3551 #endif 3552 3553 Handle java_lang_reflect_Parameter::create(TRAPS) { 3554 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3555 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3556 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3557 InstanceKlass* ik = InstanceKlass::cast(k); 3558 // Ensure it is initialized 3559 ik->initialize(CHECK_NH); 3560 return ik->allocate_instance_handle(THREAD); 3561 } 3562 3563 oop java_lang_reflect_Parameter::name(oop param) { 3564 return param->obj_field(_name_offset); 3565 } 3566 3567 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3568 param->obj_field_put(_name_offset, value); 3569 } 3570 3571 int java_lang_reflect_Parameter::modifiers(oop param) { 3572 return param->int_field(_modifiers_offset); 3573 } 3574 3575 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3576 param->int_field_put(_modifiers_offset, value); 3577 } 3578 3579 int java_lang_reflect_Parameter::index(oop param) { 3580 return param->int_field(_index_offset); 3581 } 3582 3583 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3584 param->int_field_put(_index_offset, value); 3585 } 3586 3587 oop java_lang_reflect_Parameter::executable(oop param) { 3588 return param->obj_field(_executable_offset); 3589 } 3590 3591 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3592 param->obj_field_put(_executable_offset, value); 3593 } 3594 3595 // java_lang_Module 3596 3597 int java_lang_Module::_loader_offset; 3598 int java_lang_Module::_name_offset; 3599 int java_lang_Module::_module_entry_offset; 3600 3601 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3602 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3603 return JavaCalls::construct_new_instance(vmClasses::Module_klass(), 3604 vmSymbols::java_lang_module_init_signature(), 3605 loader, module_name, CHECK_NH); 3606 } 3607 3608 #define MODULE_FIELDS_DO(macro) \ 3609 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3610 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false) 3611 3612 void java_lang_Module::compute_offsets() { 3613 InstanceKlass* k = vmClasses::Module_klass(); 3614 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3615 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3616 } 3617 3618 #if INCLUDE_CDS 3619 void java_lang_Module::serialize_offsets(SerializeClosure* f) { 3620 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3621 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3622 } 3623 #endif 3624 3625 oop java_lang_Module::loader(oop module) { 3626 return module->obj_field(_loader_offset); 3627 } 3628 3629 void java_lang_Module::set_loader(oop module, oop value) { 3630 module->obj_field_put(_loader_offset, value); 3631 } 3632 3633 oop java_lang_Module::name(oop module) { 3634 return module->obj_field(_name_offset); 3635 } 3636 3637 void java_lang_Module::set_name(oop module, oop value) { 3638 module->obj_field_put(_name_offset, value); 3639 } 3640 3641 ModuleEntry* java_lang_Module::module_entry_raw(oop module) { 3642 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 3643 assert(module != nullptr, "module can't be null"); 3644 assert(oopDesc::is_oop(module), "module must be oop"); 3645 3646 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3647 return module_entry; 3648 } 3649 3650 ModuleEntry* java_lang_Module::module_entry(oop module) { 3651 ModuleEntry* module_entry = module_entry_raw(module); 3652 if (module_entry == nullptr) { 3653 // If the inject field containing the ModuleEntry* is null then return the 3654 // class loader's unnamed module. 3655 oop loader = java_lang_Module::loader(module); 3656 Handle h_loader = Handle(Thread::current(), loader); 3657 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3658 return loader_cld->unnamed_module(); 3659 } 3660 return module_entry; 3661 } 3662 3663 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3664 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 3665 assert(module != nullptr, "module can't be null"); 3666 assert(oopDesc::is_oop(module), "module must be oop"); 3667 module->address_field_put(_module_entry_offset, (address)module_entry); 3668 } 3669 3670 Handle reflect_ConstantPool::create(TRAPS) { 3671 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3672 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass(); 3673 // Ensure it is initialized 3674 k->initialize(CHECK_NH); 3675 return k->allocate_instance_handle(THREAD); 3676 } 3677 3678 3679 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3680 oop mirror = value->pool_holder()->java_mirror(); 3681 // Save the mirror to get back the constant pool. 3682 reflect->obj_field_put(_oop_offset, mirror); 3683 } 3684 3685 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3686 3687 oop mirror = reflect->obj_field(_oop_offset); 3688 Klass* k = java_lang_Class::as_Klass(mirror); 3689 assert(k->is_instance_klass(), "Must be"); 3690 3691 // Get the constant pool back from the klass. Since class redefinition 3692 // merges the new constant pool into the old, this is essentially the 3693 // same constant pool as the original. If constant pool merging is 3694 // no longer done in the future, this will have to change to save 3695 // the original. 3696 return InstanceKlass::cast(k)->constants(); 3697 } 3698 3699 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 3700 3701 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \ 3702 macro(_base_offset, k, "base", object_signature, false) 3703 3704 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 3705 InstanceKlass* k = vmClasses::reflect_UnsafeStaticFieldAccessorImpl_klass(); 3706 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3707 } 3708 3709 #if INCLUDE_CDS 3710 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) { 3711 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3712 } 3713 #endif 3714 3715 // Support for java_lang_ref_Reference 3716 3717 bool java_lang_ref_Reference::_offsets_initialized; 3718 3719 int java_lang_ref_Reference::_referent_offset; 3720 int java_lang_ref_Reference::_queue_offset; 3721 int java_lang_ref_Reference::_next_offset; 3722 int java_lang_ref_Reference::_discovered_offset; 3723 3724 #define REFERENCE_FIELDS_DO(macro) \ 3725 macro(_referent_offset, k, "referent", object_signature, false); \ 3726 macro(_queue_offset, k, "queue", referencequeue_signature, false); \ 3727 macro(_next_offset, k, "next", reference_signature, false); \ 3728 macro(_discovered_offset, k, "discovered", reference_signature, false); 3729 3730 void java_lang_ref_Reference::compute_offsets() { 3731 if (_offsets_initialized) { 3732 return; 3733 } 3734 _offsets_initialized = true; 3735 InstanceKlass* k = vmClasses::Reference_klass(); 3736 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3737 } 3738 3739 #if INCLUDE_CDS 3740 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) { 3741 f->do_bool(&_offsets_initialized); 3742 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3743 } 3744 #endif 3745 3746 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3747 assert(obj != nullptr, "sanity"); 3748 if (offset != _referent_offset) { 3749 return false; 3750 } 3751 3752 Klass* k = obj->klass(); 3753 if (!k->is_instance_klass()) { 3754 return false; 3755 } 3756 3757 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3758 bool is_reference = ik->reference_type() != REF_NONE; 3759 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity"); 3760 return is_reference; 3761 } 3762 3763 int java_lang_boxing_object::_value_offset; 3764 int java_lang_boxing_object::_long_value_offset; 3765 3766 #define BOXING_FIELDS_DO(macro) \ 3767 macro(_value_offset, integerKlass, "value", int_signature, false); \ 3768 macro(_long_value_offset, longKlass, "value", long_signature, false); 3769 3770 void java_lang_boxing_object::compute_offsets() { 3771 InstanceKlass* integerKlass = vmClasses::Integer_klass(); 3772 InstanceKlass* longKlass = vmClasses::Long_klass(); 3773 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3774 } 3775 3776 #if INCLUDE_CDS 3777 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) { 3778 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3779 } 3780 #endif 3781 3782 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 3783 Klass* k = vmClasses::box_klass(type); 3784 if (k == nullptr) return nullptr; 3785 InstanceKlass* ik = InstanceKlass::cast(k); 3786 if (!ik->is_initialized()) { 3787 ik->initialize(CHECK_NULL); 3788 } 3789 return ik->allocate_instance(THREAD); 3790 } 3791 3792 3793 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 3794 oop box = initialize_and_allocate(type, CHECK_NULL); 3795 if (box == nullptr) return nullptr; 3796 switch (type) { 3797 case T_BOOLEAN: 3798 box->bool_field_put(_value_offset, value->z); 3799 break; 3800 case T_CHAR: 3801 box->char_field_put(_value_offset, value->c); 3802 break; 3803 case T_FLOAT: 3804 box->float_field_put(_value_offset, value->f); 3805 break; 3806 case T_DOUBLE: 3807 box->double_field_put(_long_value_offset, value->d); 3808 break; 3809 case T_BYTE: 3810 box->byte_field_put(_value_offset, value->b); 3811 break; 3812 case T_SHORT: 3813 box->short_field_put(_value_offset, value->s); 3814 break; 3815 case T_INT: 3816 box->int_field_put(_value_offset, value->i); 3817 break; 3818 case T_LONG: 3819 box->long_field_put(_long_value_offset, value->j); 3820 break; 3821 default: 3822 return nullptr; 3823 } 3824 return box; 3825 } 3826 3827 3828 BasicType java_lang_boxing_object::basic_type(oop box) { 3829 if (box == nullptr) return T_ILLEGAL; 3830 BasicType type = vmClasses::box_klass_type(box->klass()); 3831 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 3832 return T_ILLEGAL; 3833 return type; 3834 } 3835 3836 3837 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 3838 BasicType type = vmClasses::box_klass_type(box->klass()); 3839 switch (type) { 3840 case T_BOOLEAN: 3841 value->z = box->bool_field(_value_offset); 3842 break; 3843 case T_CHAR: 3844 value->c = box->char_field(_value_offset); 3845 break; 3846 case T_FLOAT: 3847 value->f = box->float_field(_value_offset); 3848 break; 3849 case T_DOUBLE: 3850 value->d = box->double_field(_long_value_offset); 3851 break; 3852 case T_BYTE: 3853 value->b = box->byte_field(_value_offset); 3854 break; 3855 case T_SHORT: 3856 value->s = box->short_field(_value_offset); 3857 break; 3858 case T_INT: 3859 value->i = box->int_field(_value_offset); 3860 break; 3861 case T_LONG: 3862 value->j = box->long_field(_long_value_offset); 3863 break; 3864 default: 3865 return T_ILLEGAL; 3866 } // end switch 3867 return type; 3868 } 3869 3870 3871 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3872 BasicType type = vmClasses::box_klass_type(box->klass()); 3873 switch (type) { 3874 case T_BOOLEAN: 3875 box->bool_field_put(_value_offset, value->z); 3876 break; 3877 case T_CHAR: 3878 box->char_field_put(_value_offset, value->c); 3879 break; 3880 case T_FLOAT: 3881 box->float_field_put(_value_offset, value->f); 3882 break; 3883 case T_DOUBLE: 3884 box->double_field_put(_long_value_offset, value->d); 3885 break; 3886 case T_BYTE: 3887 box->byte_field_put(_value_offset, value->b); 3888 break; 3889 case T_SHORT: 3890 box->short_field_put(_value_offset, value->s); 3891 break; 3892 case T_INT: 3893 box->int_field_put(_value_offset, value->i); 3894 break; 3895 case T_LONG: 3896 box->long_field_put(_long_value_offset, value->j); 3897 break; 3898 default: 3899 return T_ILLEGAL; 3900 } // end switch 3901 return type; 3902 } 3903 3904 3905 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3906 switch (type) { 3907 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3908 case T_CHAR: st->print("%d", value->c); break; 3909 case T_BYTE: st->print("%d", value->b); break; 3910 case T_SHORT: st->print("%d", value->s); break; 3911 case T_INT: st->print("%d", value->i); break; 3912 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 3913 case T_FLOAT: st->print("%f", value->f); break; 3914 case T_DOUBLE: st->print("%lf", value->d); break; 3915 default: st->print("type %d?", type); break; 3916 } 3917 } 3918 3919 3920 // Support for java_lang_ref_SoftReference 3921 // 3922 3923 int java_lang_ref_SoftReference::_timestamp_offset; 3924 int java_lang_ref_SoftReference::_static_clock_offset; 3925 3926 #define SOFTREFERENCE_FIELDS_DO(macro) \ 3927 macro(_timestamp_offset, k, "timestamp", long_signature, false); \ 3928 macro(_static_clock_offset, k, "clock", long_signature, true) 3929 3930 void java_lang_ref_SoftReference::compute_offsets() { 3931 InstanceKlass* k = vmClasses::SoftReference_klass(); 3932 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3933 } 3934 3935 #if INCLUDE_CDS 3936 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) { 3937 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3938 } 3939 #endif 3940 3941 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3942 return ref->long_field(_timestamp_offset); 3943 } 3944 3945 jlong java_lang_ref_SoftReference::clock() { 3946 InstanceKlass* ik = vmClasses::SoftReference_klass(); 3947 oop base = ik->static_field_base_raw(); 3948 return base->long_field(_static_clock_offset); 3949 } 3950 3951 void java_lang_ref_SoftReference::set_clock(jlong value) { 3952 InstanceKlass* ik = vmClasses::SoftReference_klass(); 3953 oop base = ik->static_field_base_raw(); 3954 base->long_field_put(_static_clock_offset, value); 3955 } 3956 3957 // Support for java_lang_invoke_DirectMethodHandle 3958 3959 int java_lang_invoke_DirectMethodHandle::_member_offset; 3960 3961 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3962 oop member_name = nullptr; 3963 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 3964 "a DirectMethodHandle oop is expected"); 3965 return dmh->obj_field(_member_offset); 3966 } 3967 3968 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 3969 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 3970 3971 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3972 InstanceKlass* k = vmClasses::DirectMethodHandle_klass(); 3973 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3974 } 3975 3976 #if INCLUDE_CDS 3977 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) { 3978 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3979 } 3980 #endif 3981 3982 // Support for java_lang_invoke_MethodHandle 3983 3984 int java_lang_invoke_MethodHandle::_type_offset; 3985 int java_lang_invoke_MethodHandle::_form_offset; 3986 3987 int java_lang_invoke_MemberName::_clazz_offset; 3988 int java_lang_invoke_MemberName::_name_offset; 3989 int java_lang_invoke_MemberName::_type_offset; 3990 int java_lang_invoke_MemberName::_flags_offset; 3991 int java_lang_invoke_MemberName::_method_offset; 3992 int java_lang_invoke_MemberName::_vmindex_offset; 3993 3994 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 3995 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 3996 3997 int java_lang_invoke_LambdaForm::_vmentry_offset; 3998 3999 #define METHODHANDLE_FIELDS_DO(macro) \ 4000 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 4001 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 4002 4003 void java_lang_invoke_MethodHandle::compute_offsets() { 4004 InstanceKlass* k = vmClasses::MethodHandle_klass(); 4005 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4006 } 4007 4008 #if INCLUDE_CDS 4009 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) { 4010 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4011 } 4012 #endif 4013 4014 #define MEMBERNAME_FIELDS_DO(macro) \ 4015 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 4016 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 4017 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 4018 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 4019 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 4020 4021 void java_lang_invoke_MemberName::compute_offsets() { 4022 InstanceKlass* k = vmClasses::MemberName_klass(); 4023 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4024 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4025 } 4026 4027 #if INCLUDE_CDS 4028 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) { 4029 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4030 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4031 } 4032 #endif 4033 4034 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 4035 InstanceKlass* k = vmClasses::ResolvedMethodName_klass(); 4036 assert(k != nullptr, "jdk mismatch"); 4037 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4038 } 4039 4040 #if INCLUDE_CDS 4041 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) { 4042 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4043 } 4044 #endif 4045 4046 #define LAMBDAFORM_FIELDS_DO(macro) \ 4047 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 4048 4049 void java_lang_invoke_LambdaForm::compute_offsets() { 4050 InstanceKlass* k = vmClasses::LambdaForm_klass(); 4051 assert (k != nullptr, "jdk mismatch"); 4052 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4053 } 4054 4055 #if INCLUDE_CDS 4056 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) { 4057 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4058 } 4059 #endif 4060 4061 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 4062 return obj != nullptr && is_subclass(obj->klass()); 4063 } 4064 4065 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset; 4066 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset; 4067 4068 #define NEP_FIELDS_DO(macro) \ 4069 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \ 4070 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false); 4071 4072 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) { 4073 return obj != nullptr && is_subclass(obj->klass()); 4074 } 4075 4076 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() { 4077 InstanceKlass* k = vmClasses::NativeEntryPoint_klass(); 4078 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4079 } 4080 4081 #if INCLUDE_CDS 4082 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) { 4083 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4084 } 4085 #endif 4086 4087 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) { 4088 return entry->obj_field(_method_type_offset); 4089 } 4090 4091 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) { 4092 return entry->long_field(_downcall_stub_address_offset); 4093 } 4094 4095 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset; 4096 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset; 4097 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset; 4098 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset; 4099 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset; 4100 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset; 4101 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset; 4102 4103 #define ABIDescriptor_FIELDS_DO(macro) \ 4104 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4105 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4106 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4107 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \ 4108 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \ 4109 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \ 4110 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false); 4111 4112 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) { 4113 return obj != nullptr && is_subclass(obj->klass()); 4114 } 4115 4116 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() { 4117 InstanceKlass* k = vmClasses::ABIDescriptor_klass(); 4118 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4119 } 4120 4121 #if INCLUDE_CDS 4122 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) { 4123 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4124 } 4125 #endif 4126 4127 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) { 4128 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset)); 4129 } 4130 4131 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) { 4132 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset)); 4133 } 4134 4135 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) { 4136 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset)); 4137 } 4138 4139 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) { 4140 return entry->int_field(_stackAlignment_offset); 4141 } 4142 4143 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) { 4144 return entry->int_field(_shadowSpace_offset); 4145 } 4146 4147 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) { 4148 return entry->obj_field(_scratch1_offset); 4149 } 4150 4151 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) { 4152 return entry->obj_field(_scratch2_offset); 4153 } 4154 4155 int jdk_internal_foreign_abi_VMStorage::_type_offset; 4156 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset; 4157 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset; 4158 int jdk_internal_foreign_abi_VMStorage::_debugName_offset; 4159 4160 #define VMStorage_FIELDS_DO(macro) \ 4161 macro(_type_offset, k, "type", byte_signature, false); \ 4162 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \ 4163 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \ 4164 macro(_debugName_offset, k, "debugName", string_signature, false); \ 4165 4166 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) { 4167 return obj != nullptr && is_subclass(obj->klass()); 4168 } 4169 4170 void jdk_internal_foreign_abi_VMStorage::compute_offsets() { 4171 InstanceKlass* k = vmClasses::VMStorage_klass(); 4172 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4173 } 4174 4175 #if INCLUDE_CDS 4176 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) { 4177 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4178 } 4179 #endif 4180 4181 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) { 4182 return entry->byte_field(_type_offset); 4183 } 4184 4185 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) { 4186 return entry->int_field(_indexOrOffset_offset); 4187 } 4188 4189 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) { 4190 return entry->short_field(_segmentMaskOrSize_offset); 4191 } 4192 4193 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) { 4194 return entry->obj_field(_debugName_offset); 4195 } 4196 4197 int jdk_internal_foreign_abi_CallConv::_argRegs_offset; 4198 int jdk_internal_foreign_abi_CallConv::_retRegs_offset; 4199 4200 #define CallConv_FIELDS_DO(macro) \ 4201 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \ 4202 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \ 4203 4204 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) { 4205 return obj != nullptr && is_subclass(obj->klass()); 4206 } 4207 4208 void jdk_internal_foreign_abi_CallConv::compute_offsets() { 4209 InstanceKlass* k = vmClasses::CallConv_klass(); 4210 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4211 } 4212 4213 #if INCLUDE_CDS 4214 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) { 4215 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4216 } 4217 #endif 4218 4219 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) { 4220 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset)); 4221 } 4222 4223 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) { 4224 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset)); 4225 } 4226 4227 oop java_lang_invoke_MethodHandle::type(oop mh) { 4228 return mh->obj_field(_type_offset); 4229 } 4230 4231 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 4232 mh->obj_field_put(_type_offset, mtype); 4233 } 4234 4235 oop java_lang_invoke_MethodHandle::form(oop mh) { 4236 assert(_form_offset != 0, ""); 4237 return mh->obj_field(_form_offset); 4238 } 4239 4240 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 4241 assert(_form_offset != 0, ""); 4242 mh->obj_field_put(_form_offset, lform); 4243 } 4244 4245 /// MemberName accessors 4246 4247 oop java_lang_invoke_MemberName::clazz(oop mname) { 4248 assert(is_instance(mname), "wrong type"); 4249 return mname->obj_field(_clazz_offset); 4250 } 4251 4252 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 4253 assert(is_instance(mname), "wrong type"); 4254 mname->obj_field_put(_clazz_offset, clazz); 4255 } 4256 4257 oop java_lang_invoke_MemberName::name(oop mname) { 4258 assert(is_instance(mname), "wrong type"); 4259 return mname->obj_field(_name_offset); 4260 } 4261 4262 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 4263 assert(is_instance(mname), "wrong type"); 4264 mname->obj_field_put(_name_offset, name); 4265 } 4266 4267 oop java_lang_invoke_MemberName::type(oop mname) { 4268 assert(is_instance(mname), "wrong type"); 4269 return mname->obj_field(_type_offset); 4270 } 4271 4272 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 4273 assert(is_instance(mname), "wrong type"); 4274 mname->obj_field_put(_type_offset, type); 4275 } 4276 4277 int java_lang_invoke_MemberName::flags(oop mname) { 4278 assert(is_instance(mname), "wrong type"); 4279 return mname->int_field(_flags_offset); 4280 } 4281 4282 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 4283 assert(is_instance(mname), "wrong type"); 4284 mname->int_field_put(_flags_offset, flags); 4285 } 4286 4287 4288 // Return vmtarget from ResolvedMethodName method field through indirection 4289 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 4290 assert(is_instance(mname), "wrong type"); 4291 oop method = mname->obj_field(_method_offset); 4292 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method); 4293 } 4294 4295 bool java_lang_invoke_MemberName::is_method(oop mname) { 4296 assert(is_instance(mname), "must be MemberName"); 4297 return (flags(mname) & (MN_IS_METHOD | MN_IS_OBJECT_CONSTRUCTOR)) > 0; 4298 } 4299 4300 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 4301 assert(is_instance(mname), "wrong type"); 4302 mname->obj_field_put(_method_offset, resolved_method); 4303 } 4304 4305 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 4306 assert(is_instance(mname), "wrong type"); 4307 return (intptr_t) mname->address_field(_vmindex_offset); 4308 } 4309 4310 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 4311 assert(is_instance(mname), "wrong type"); 4312 mname->address_field_put(_vmindex_offset, (address) index); 4313 } 4314 4315 4316 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 4317 assert(is_instance(resolved_method), "wrong type"); 4318 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 4319 assert(m->is_method(), "must be"); 4320 return m; 4321 } 4322 4323 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 4324 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 4325 assert(is_instance(resolved_method), "wrong type"); 4326 resolved_method->address_field_put(_vmtarget_offset, (address)m); 4327 } 4328 4329 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) { 4330 assert(is_instance(resolved_method), "wrong type"); 4331 resolved_method->obj_field_put(_vmholder_offset, holder); 4332 } 4333 4334 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 4335 const Method* method = m(); 4336 4337 // lookup ResolvedMethod oop in the table, or create a new one and intern it 4338 oop resolved_method = ResolvedMethodTable::find_method(method); 4339 if (resolved_method != nullptr) { 4340 return resolved_method; 4341 } 4342 4343 InstanceKlass* k = vmClasses::ResolvedMethodName_klass(); 4344 if (!k->is_initialized()) { 4345 k->initialize(CHECK_NULL); 4346 } 4347 4348 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 4349 4350 NoSafepointVerifier nsv; 4351 4352 if (method->is_old()) { 4353 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() : 4354 method->get_new_method(); 4355 } 4356 4357 InstanceKlass* holder = method->method_holder(); 4358 4359 set_vmtarget(new_resolved_method, const_cast<Method*>(method)); 4360 // Add a reference to the loader (actually mirror because hidden classes may not have 4361 // distinct loaders) to ensure the metadata is kept alive. 4362 // This mirror may be different than the one in clazz field. 4363 set_vmholder(new_resolved_method, holder->java_mirror()); 4364 4365 // Set flag in class to indicate this InstanceKlass has entries in the table 4366 // to avoid walking table during redefinition if none of the redefined classes 4367 // have any membernames in the table. 4368 holder->set_has_resolved_methods(); 4369 4370 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method)); 4371 } 4372 4373 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 4374 assert(is_instance(lform), "wrong type"); 4375 return lform->obj_field(_vmentry_offset); 4376 } 4377 4378 4379 // Support for java_lang_invoke_MethodType 4380 4381 int java_lang_invoke_MethodType::_rtype_offset; 4382 int java_lang_invoke_MethodType::_ptypes_offset; 4383 4384 #define METHODTYPE_FIELDS_DO(macro) \ 4385 macro(_rtype_offset, k, "rtype", class_signature, false); \ 4386 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 4387 4388 void java_lang_invoke_MethodType::compute_offsets() { 4389 InstanceKlass* k = vmClasses::MethodType_klass(); 4390 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4391 } 4392 4393 #if INCLUDE_CDS 4394 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) { 4395 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4396 } 4397 #endif 4398 4399 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 4400 st->print("("); 4401 objArrayOop pts = ptypes(mt); 4402 if (pts != nullptr) { 4403 for (int i = 0, limit = pts->length(); i < limit; i++) { 4404 java_lang_Class::print_signature(pts->obj_at(i), st); 4405 } 4406 } else { 4407 st->print("null"); 4408 } 4409 st->print(")"); 4410 oop rt = rtype(mt); 4411 if (rt != nullptr) { 4412 java_lang_Class::print_signature(rt, st); 4413 } else { 4414 st->print("null"); 4415 } 4416 } 4417 4418 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) { 4419 ResourceMark rm; 4420 stringStream buffer(128); 4421 print_signature(mt, &buffer); 4422 const char* sigstr = buffer.base(); 4423 int siglen = (int) buffer.size(); 4424 Symbol *name; 4425 if (!intern_if_not_found) { 4426 name = SymbolTable::probe(sigstr, siglen); 4427 } else { 4428 name = SymbolTable::new_symbol(sigstr, siglen); 4429 } 4430 return name; 4431 } 4432 4433 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 4434 if (mt1 == mt2) 4435 return true; 4436 if (rtype(mt1) != rtype(mt2)) 4437 return false; 4438 if (ptype_count(mt1) != ptype_count(mt2)) 4439 return false; 4440 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 4441 if (ptype(mt1, i) != ptype(mt2, i)) 4442 return false; 4443 } 4444 return true; 4445 } 4446 4447 oop java_lang_invoke_MethodType::rtype(oop mt) { 4448 assert(is_instance(mt), "must be a MethodType"); 4449 return mt->obj_field(_rtype_offset); 4450 } 4451 4452 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 4453 assert(is_instance(mt), "must be a MethodType"); 4454 return (objArrayOop) mt->obj_field(_ptypes_offset); 4455 } 4456 4457 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 4458 return ptypes(mt)->obj_at(idx); 4459 } 4460 4461 int java_lang_invoke_MethodType::ptype_count(oop mt) { 4462 return ptypes(mt)->length(); 4463 } 4464 4465 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 4466 objArrayOop pts = ptypes(mt); 4467 int count = pts->length(); 4468 int slots = 0; 4469 for (int i = 0; i < count; i++) { 4470 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 4471 slots += type2size[bt]; 4472 } 4473 return slots; 4474 } 4475 4476 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 4477 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 4478 return type2size[bt]; 4479 } 4480 4481 4482 // Support for java_lang_invoke_CallSite 4483 4484 int java_lang_invoke_CallSite::_target_offset; 4485 int java_lang_invoke_CallSite::_context_offset; 4486 4487 #define CALLSITE_FIELDS_DO(macro) \ 4488 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 4489 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false) 4490 4491 void java_lang_invoke_CallSite::compute_offsets() { 4492 InstanceKlass* k = vmClasses::CallSite_klass(); 4493 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4494 } 4495 4496 #if INCLUDE_CDS 4497 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) { 4498 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4499 } 4500 #endif 4501 4502 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) { 4503 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 4504 4505 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset); 4506 return dep_oop; 4507 } 4508 4509 // Support for java_lang_invoke_ConstantCallSite 4510 4511 int java_lang_invoke_ConstantCallSite::_is_frozen_offset; 4512 4513 #define CONSTANTCALLSITE_FIELDS_DO(macro) \ 4514 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false) 4515 4516 void java_lang_invoke_ConstantCallSite::compute_offsets() { 4517 InstanceKlass* k = vmClasses::ConstantCallSite_klass(); 4518 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4519 } 4520 4521 #if INCLUDE_CDS 4522 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) { 4523 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4524 } 4525 #endif 4526 4527 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 4528 4529 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 4530 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset; 4531 4532 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 4533 InstanceKlass* k = vmClasses::Context_klass(); 4534 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4535 } 4536 4537 #if INCLUDE_CDS 4538 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) { 4539 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4540 } 4541 #endif 4542 4543 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 4544 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 4545 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset); 4546 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset); 4547 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr); 4548 return dep_ctx; 4549 } 4550 4551 // Support for java_security_AccessControlContext 4552 4553 int java_security_AccessControlContext::_context_offset; 4554 int java_security_AccessControlContext::_privilegedContext_offset; 4555 int java_security_AccessControlContext::_isPrivileged_offset; 4556 int java_security_AccessControlContext::_isAuthorized_offset; 4557 4558 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \ 4559 macro(_context_offset, k, "context", protectiondomain_signature, false); \ 4560 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \ 4561 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \ 4562 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false) 4563 4564 void java_security_AccessControlContext::compute_offsets() { 4565 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 4566 InstanceKlass* k = vmClasses::AccessControlContext_klass(); 4567 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4568 } 4569 4570 #if INCLUDE_CDS 4571 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) { 4572 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4573 } 4574 #endif 4575 4576 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 4577 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 4578 assert(_isAuthorized_offset != 0, "offsets should have been initialized"); 4579 // Ensure klass is initialized 4580 vmClasses::AccessControlContext_klass()->initialize(CHECK_NULL); 4581 // Allocate result 4582 oop result = vmClasses::AccessControlContext_klass()->allocate_instance(CHECK_NULL); 4583 // Fill in values 4584 result->obj_field_put(_context_offset, context()); 4585 result->obj_field_put(_privilegedContext_offset, privileged_context()); 4586 result->bool_field_put(_isPrivileged_offset, isPrivileged); 4587 result->bool_field_put(_isAuthorized_offset, true); 4588 return result; 4589 } 4590 4591 4592 // Support for java_lang_ClassLoader 4593 4594 int java_lang_ClassLoader::_loader_data_offset; 4595 int java_lang_ClassLoader::_parallelCapable_offset; 4596 int java_lang_ClassLoader::_name_offset; 4597 int java_lang_ClassLoader::_nameAndId_offset; 4598 int java_lang_ClassLoader::_unnamedModule_offset; 4599 int java_lang_ClassLoader::_parent_offset; 4600 4601 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) { 4602 assert(loader != nullptr, "loader must not be null"); 4603 assert(oopDesc::is_oop(loader), "loader must be oop"); 4604 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset)); 4605 } 4606 4607 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 4608 assert(loader != nullptr, "loader must not be null"); 4609 assert(oopDesc::is_oop(loader), "loader must be oop"); 4610 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset); 4611 } 4612 4613 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) { 4614 assert(loader != nullptr, "loader must not be null"); 4615 assert(oopDesc::is_oop(loader), "loader must be oop"); 4616 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data); 4617 } 4618 4619 #define CLASSLOADER_FIELDS_DO(macro) \ 4620 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 4621 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 4622 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \ 4623 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 4624 macro(_parent_offset, k1, "parent", classloader_signature, false) 4625 4626 void java_lang_ClassLoader::compute_offsets() { 4627 InstanceKlass* k1 = vmClasses::ClassLoader_klass(); 4628 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4629 4630 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4631 } 4632 4633 #if INCLUDE_CDS 4634 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) { 4635 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4636 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4637 } 4638 #endif 4639 4640 oop java_lang_ClassLoader::parent(oop loader) { 4641 assert(is_instance(loader), "loader must be oop"); 4642 return loader->obj_field(_parent_offset); 4643 } 4644 4645 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) { 4646 assert(is_instance(loader), "loader must be oop"); 4647 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset); 4648 } 4649 4650 // Returns the name field of this class loader. If the name field has not 4651 // been set, null will be returned. 4652 oop java_lang_ClassLoader::name(oop loader) { 4653 assert(is_instance(loader), "loader must be oop"); 4654 return loader->obj_field(_name_offset); 4655 } 4656 4657 // Returns the nameAndId field of this class loader. The format is 4658 // as follows: 4659 // If the defining loader has a name explicitly set then '<loader-name>' @<id> 4660 // If the defining loader has no name then <qualified-class-name> @<id> 4661 // If built-in loader, then omit '@<id>' as there is only one instance. 4662 // Use ClassLoader::loader_name_id() to obtain this String as a char*. 4663 oop java_lang_ClassLoader::nameAndId(oop loader) { 4664 assert(is_instance(loader), "loader must be oop"); 4665 return loader->obj_field(_nameAndId_offset); 4666 } 4667 4668 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 4669 assert(is_instance(loader), "loader must be oop"); 4670 assert(cl == nullptr || is_instance(cl), "cl argument must be oop"); 4671 oop acl = loader; 4672 debug_only(jint loop_count = 0); 4673 // This loop taken verbatim from ClassLoader.java: 4674 do { 4675 acl = parent(acl); 4676 if (cl == acl) { 4677 return true; 4678 } 4679 assert(++loop_count > 0, "loop_count overflow"); 4680 } while (acl != nullptr); 4681 return false; 4682 } 4683 4684 bool java_lang_ClassLoader::is_instance(oop obj) { 4685 return obj != nullptr && is_subclass(obj->klass()); 4686 } 4687 4688 4689 // For class loader classes, parallelCapable defined 4690 // based on non-null field 4691 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 4692 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 4693 assert(_parallelCapable_offset != 0, "offsets should have been initialized"); 4694 return (class_loader->obj_field(_parallelCapable_offset) != nullptr); 4695 } 4696 4697 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 4698 // Fix for 4474172; see evaluation for more details 4699 loader = non_reflection_class_loader(loader); 4700 4701 oop cl = SystemDictionary::java_system_loader(); 4702 while(cl != nullptr) { 4703 if (cl == loader) return true; 4704 cl = parent(cl); 4705 } 4706 return false; 4707 } 4708 4709 // Return true if this is one of the class loaders associated with 4710 // the generated bytecodes for reflection. 4711 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 4712 if (loader != nullptr) { 4713 Klass* delegating_cl_class = vmClasses::reflect_DelegatingClassLoader_klass(); 4714 // This might be null in non-1.4 JDKs 4715 return (delegating_cl_class != nullptr && loader->is_a(delegating_cl_class)); 4716 } 4717 return false; 4718 } 4719 4720 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 4721 // See whether this is one of the class loaders associated with 4722 // the generated bytecodes for reflection, and if so, "magically" 4723 // delegate to its parent to prevent class loading from occurring 4724 // in places where applications using reflection didn't expect it. 4725 if (is_reflection_class_loader(loader)) { 4726 return parent(loader); 4727 } 4728 return loader; 4729 } 4730 4731 oop java_lang_ClassLoader::unnamedModule(oop loader) { 4732 assert(is_instance(loader), "loader must be oop"); 4733 return loader->obj_field(_unnamedModule_offset); 4734 } 4735 4736 // Support for java_lang_System 4737 // 4738 4739 int java_lang_System::_static_in_offset; 4740 int java_lang_System::_static_out_offset; 4741 int java_lang_System::_static_err_offset; 4742 int java_lang_System::_static_security_offset; 4743 int java_lang_System::_static_allow_security_offset; 4744 int java_lang_System::_static_never_offset; 4745 4746 #define SYSTEM_FIELDS_DO(macro) \ 4747 macro(_static_in_offset, k, "in", input_stream_signature, true); \ 4748 macro(_static_out_offset, k, "out", print_stream_signature, true); \ 4749 macro(_static_err_offset, k, "err", print_stream_signature, true); \ 4750 macro(_static_security_offset, k, "security", security_manager_signature, true); \ 4751 macro(_static_allow_security_offset, k, "allowSecurityManager", int_signature, true); \ 4752 macro(_static_never_offset, k, "NEVER", int_signature, true) 4753 4754 void java_lang_System::compute_offsets() { 4755 InstanceKlass* k = vmClasses::System_klass(); 4756 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4757 } 4758 4759 // This field tells us that a security manager can never be installed so we 4760 // can completely skip populating the ProtectionDomainCacheTable. 4761 bool java_lang_System::allow_security_manager() { 4762 static int initialized = false; 4763 static bool allowed = true; // default 4764 if (!initialized) { 4765 oop base = vmClasses::System_klass()->static_field_base_raw(); 4766 int never = base->int_field(_static_never_offset); 4767 allowed = (base->int_field(_static_allow_security_offset) != never); 4768 initialized = true; 4769 } 4770 return allowed; 4771 } 4772 4773 // This field tells us that a security manager is installed. 4774 bool java_lang_System::has_security_manager() { 4775 oop base = vmClasses::System_klass()->static_field_base_raw(); 4776 return base->obj_field(_static_security_offset) != nullptr; 4777 } 4778 4779 #if INCLUDE_CDS 4780 void java_lang_System::serialize_offsets(SerializeClosure* f) { 4781 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4782 } 4783 #endif 4784 4785 // Support for jdk_internal_misc_UnsafeConstants 4786 // 4787 class UnsafeConstantsFixup : public FieldClosure { 4788 private: 4789 int _address_size; 4790 int _page_size; 4791 bool _big_endian; 4792 bool _use_unaligned_access; 4793 int _data_cache_line_flush_size; 4794 public: 4795 UnsafeConstantsFixup() { 4796 // round up values for all static final fields 4797 _address_size = sizeof(void*); 4798 _page_size = (int)os::vm_page_size(); 4799 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true); 4800 _use_unaligned_access = UseUnalignedAccesses; 4801 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size(); 4802 } 4803 4804 void do_field(fieldDescriptor* fd) { 4805 oop mirror = fd->field_holder()->java_mirror(); 4806 assert(mirror != nullptr, "UnsafeConstants must have mirror already"); 4807 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants"); 4808 assert(fd->is_final(), "fields of UnsafeConstants must be final"); 4809 assert(fd->is_static(), "fields of UnsafeConstants must be static"); 4810 if (fd->name() == vmSymbols::address_size_name()) { 4811 mirror->int_field_put(fd->offset(), _address_size); 4812 } else if (fd->name() == vmSymbols::page_size_name()) { 4813 mirror->int_field_put(fd->offset(), _page_size); 4814 } else if (fd->name() == vmSymbols::big_endian_name()) { 4815 mirror->bool_field_put(fd->offset(), _big_endian); 4816 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) { 4817 mirror->bool_field_put(fd->offset(), _use_unaligned_access); 4818 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) { 4819 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size); 4820 } else { 4821 assert(false, "unexpected UnsafeConstants field"); 4822 } 4823 } 4824 }; 4825 4826 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() { 4827 UnsafeConstantsFixup fixup; 4828 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup); 4829 } 4830 4831 4832 // java_lang_StackTraceElement 4833 4834 int java_lang_StackTraceElement::_methodName_offset; 4835 int java_lang_StackTraceElement::_fileName_offset; 4836 int java_lang_StackTraceElement::_lineNumber_offset; 4837 int java_lang_StackTraceElement::_moduleName_offset; 4838 int java_lang_StackTraceElement::_moduleVersion_offset; 4839 int java_lang_StackTraceElement::_classLoaderName_offset; 4840 int java_lang_StackTraceElement::_declaringClass_offset; 4841 int java_lang_StackTraceElement::_declaringClassObject_offset; 4842 4843 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4844 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4845 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4846 macro(_moduleName_offset, k, "moduleName", string_signature, false); \ 4847 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4848 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \ 4849 macro(_methodName_offset, k, "methodName", string_signature, false); \ 4850 macro(_fileName_offset, k, "fileName", string_signature, false); \ 4851 macro(_lineNumber_offset, k, "lineNumber", int_signature, false) 4852 4853 // Support for java_lang_StackTraceElement 4854 void java_lang_StackTraceElement::compute_offsets() { 4855 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 4856 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4857 } 4858 4859 #if INCLUDE_CDS 4860 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) { 4861 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4862 } 4863 #endif 4864 4865 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 4866 element->obj_field_put(_fileName_offset, value); 4867 } 4868 4869 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 4870 element->obj_field_put(_declaringClass_offset, value); 4871 } 4872 4873 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 4874 element->obj_field_put(_methodName_offset, value); 4875 } 4876 4877 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 4878 element->int_field_put(_lineNumber_offset, value); 4879 } 4880 4881 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 4882 element->obj_field_put(_moduleName_offset, value); 4883 } 4884 4885 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 4886 element->obj_field_put(_moduleVersion_offset, value); 4887 } 4888 4889 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 4890 element->obj_field_put(_classLoaderName_offset, value); 4891 } 4892 4893 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 4894 element->obj_field_put(_declaringClassObject_offset, value); 4895 } 4896 4897 4898 // java_lang_AssertionStatusDirectives 4899 4900 int java_lang_AssertionStatusDirectives::_classes_offset; 4901 int java_lang_AssertionStatusDirectives::_classEnabled_offset; 4902 int java_lang_AssertionStatusDirectives::_packages_offset; 4903 int java_lang_AssertionStatusDirectives::_packageEnabled_offset; 4904 int java_lang_AssertionStatusDirectives::_deflt_offset; 4905 4906 // Support for java Assertions - java_lang_AssertionStatusDirectives. 4907 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 4908 macro(_classes_offset, k, "classes", string_array_signature, false); \ 4909 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 4910 macro(_packages_offset, k, "packages", string_array_signature, false); \ 4911 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 4912 macro(_deflt_offset, k, "deflt", bool_signature, false) 4913 4914 void java_lang_AssertionStatusDirectives::compute_offsets() { 4915 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass(); 4916 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4917 } 4918 4919 #if INCLUDE_CDS 4920 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) { 4921 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4922 } 4923 #endif 4924 4925 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 4926 o->obj_field_put(_classes_offset, val); 4927 } 4928 4929 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 4930 o->obj_field_put(_classEnabled_offset, val); 4931 } 4932 4933 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 4934 o->obj_field_put(_packages_offset, val); 4935 } 4936 4937 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 4938 o->obj_field_put(_packageEnabled_offset, val); 4939 } 4940 4941 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 4942 o->bool_field_put(_deflt_offset, val); 4943 } 4944 4945 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset; 4946 4947 #define AOS_FIELDS_DO(macro) \ 4948 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false) 4949 4950 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() { 4951 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass(); 4952 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4953 } 4954 4955 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 4956 assert(_owner_offset != 0, "Must be initialized"); 4957 return obj->obj_field(_owner_offset); 4958 } 4959 4960 #if INCLUDE_CDS 4961 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) { 4962 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4963 } 4964 #endif 4965 4966 int vector_VectorPayload::_payload_offset; 4967 4968 #define VECTORPAYLOAD_FIELDS_DO(macro) \ 4969 macro(_payload_offset, k, "payload", object_signature, false) 4970 4971 void vector_VectorPayload::compute_offsets() { 4972 InstanceKlass* k = vmClasses::vector_VectorPayload_klass(); 4973 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4974 } 4975 4976 #if INCLUDE_CDS 4977 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) { 4978 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4979 } 4980 #endif 4981 4982 void vector_VectorPayload::set_payload(oop o, oop val) { 4983 o->obj_field_put(_payload_offset, val); 4984 } 4985 4986 bool vector_VectorPayload::is_instance(oop obj) { 4987 return obj != nullptr && is_subclass(obj->klass()); 4988 } 4989 4990 int java_lang_Integer_IntegerCache::_static_cache_offset; 4991 int java_lang_Long_LongCache::_static_cache_offset; 4992 int java_lang_Character_CharacterCache::_static_cache_offset; 4993 int java_lang_Short_ShortCache::_static_cache_offset; 4994 int java_lang_Byte_ByteCache::_static_cache_offset; 4995 4996 #define INTEGER_CACHE_FIELDS_DO(macro) \ 4997 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true) 4998 4999 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) { 5000 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5001 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5002 } 5003 5004 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) { 5005 oop base = ik->static_field_base_raw(); 5006 return objArrayOop(base->obj_field(_static_cache_offset)); 5007 } 5008 5009 Symbol* java_lang_Integer_IntegerCache::symbol() { 5010 return vmSymbols::java_lang_Integer_IntegerCache(); 5011 } 5012 5013 #if INCLUDE_CDS 5014 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) { 5015 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5016 } 5017 #endif 5018 #undef INTEGER_CACHE_FIELDS_DO 5019 5020 jint java_lang_Integer::value(oop obj) { 5021 jvalue v; 5022 java_lang_boxing_object::get_value(obj, &v); 5023 return v.i; 5024 } 5025 5026 #define LONG_CACHE_FIELDS_DO(macro) \ 5027 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true) 5028 5029 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) { 5030 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5031 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5032 } 5033 5034 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) { 5035 oop base = ik->static_field_base_raw(); 5036 return objArrayOop(base->obj_field(_static_cache_offset)); 5037 } 5038 5039 Symbol* java_lang_Long_LongCache::symbol() { 5040 return vmSymbols::java_lang_Long_LongCache(); 5041 } 5042 5043 #if INCLUDE_CDS 5044 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) { 5045 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5046 } 5047 #endif 5048 #undef LONG_CACHE_FIELDS_DO 5049 5050 jlong java_lang_Long::value(oop obj) { 5051 jvalue v; 5052 java_lang_boxing_object::get_value(obj, &v); 5053 return v.j; 5054 } 5055 5056 #define CHARACTER_CACHE_FIELDS_DO(macro) \ 5057 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true) 5058 5059 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) { 5060 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5061 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5062 } 5063 5064 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) { 5065 oop base = ik->static_field_base_raw(); 5066 return objArrayOop(base->obj_field(_static_cache_offset)); 5067 } 5068 5069 Symbol* java_lang_Character_CharacterCache::symbol() { 5070 return vmSymbols::java_lang_Character_CharacterCache(); 5071 } 5072 5073 #if INCLUDE_CDS 5074 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) { 5075 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5076 } 5077 #endif 5078 #undef CHARACTER_CACHE_FIELDS_DO 5079 5080 jchar java_lang_Character::value(oop obj) { 5081 jvalue v; 5082 java_lang_boxing_object::get_value(obj, &v); 5083 return v.c; 5084 } 5085 5086 #define SHORT_CACHE_FIELDS_DO(macro) \ 5087 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true) 5088 5089 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) { 5090 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5091 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5092 } 5093 5094 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) { 5095 oop base = ik->static_field_base_raw(); 5096 return objArrayOop(base->obj_field(_static_cache_offset)); 5097 } 5098 5099 Symbol* java_lang_Short_ShortCache::symbol() { 5100 return vmSymbols::java_lang_Short_ShortCache(); 5101 } 5102 5103 #if INCLUDE_CDS 5104 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) { 5105 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5106 } 5107 #endif 5108 #undef SHORT_CACHE_FIELDS_DO 5109 5110 jshort java_lang_Short::value(oop obj) { 5111 jvalue v; 5112 java_lang_boxing_object::get_value(obj, &v); 5113 return v.s; 5114 } 5115 5116 #define BYTE_CACHE_FIELDS_DO(macro) \ 5117 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true) 5118 5119 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) { 5120 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5121 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5122 } 5123 5124 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) { 5125 oop base = ik->static_field_base_raw(); 5126 return objArrayOop(base->obj_field(_static_cache_offset)); 5127 } 5128 5129 Symbol* java_lang_Byte_ByteCache::symbol() { 5130 return vmSymbols::java_lang_Byte_ByteCache(); 5131 } 5132 5133 #if INCLUDE_CDS 5134 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) { 5135 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5136 } 5137 #endif 5138 #undef BYTE_CACHE_FIELDS_DO 5139 5140 jbyte java_lang_Byte::value(oop obj) { 5141 jvalue v; 5142 java_lang_boxing_object::get_value(obj, &v); 5143 return v.b; 5144 } 5145 5146 int java_lang_Boolean::_static_TRUE_offset; 5147 int java_lang_Boolean::_static_FALSE_offset; 5148 5149 #define BOOLEAN_FIELDS_DO(macro) \ 5150 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \ 5151 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true) 5152 5153 5154 void java_lang_Boolean::compute_offsets(InstanceKlass *k) { 5155 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5156 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5157 } 5158 5159 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) { 5160 oop base = ik->static_field_base_raw(); 5161 return base->obj_field(_static_TRUE_offset); 5162 } 5163 5164 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) { 5165 oop base = ik->static_field_base_raw(); 5166 return base->obj_field(_static_FALSE_offset); 5167 } 5168 5169 Symbol* java_lang_Boolean::symbol() { 5170 return vmSymbols::java_lang_Boolean(); 5171 } 5172 5173 #if INCLUDE_CDS 5174 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) { 5175 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5176 } 5177 #endif 5178 #undef BOOLEAN_CACHE_FIELDS_DO 5179 5180 jboolean java_lang_Boolean::value(oop obj) { 5181 jvalue v; 5182 java_lang_boxing_object::get_value(obj, &v); 5183 return v.z; 5184 } 5185 5186 // java_lang_reflect_RecordComponent 5187 5188 int java_lang_reflect_RecordComponent::_clazz_offset; 5189 int java_lang_reflect_RecordComponent::_name_offset; 5190 int java_lang_reflect_RecordComponent::_type_offset; 5191 int java_lang_reflect_RecordComponent::_accessor_offset; 5192 int java_lang_reflect_RecordComponent::_signature_offset; 5193 int java_lang_reflect_RecordComponent::_annotations_offset; 5194 int java_lang_reflect_RecordComponent::_typeAnnotations_offset; 5195 5196 #define RECORDCOMPONENT_FIELDS_DO(macro) \ 5197 macro(_clazz_offset, k, "clazz", class_signature, false); \ 5198 macro(_name_offset, k, "name", string_signature, false); \ 5199 macro(_type_offset, k, "type", class_signature, false); \ 5200 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \ 5201 macro(_signature_offset, k, "signature", string_signature, false); \ 5202 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \ 5203 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false); 5204 5205 // Support for java_lang_reflect_RecordComponent 5206 void java_lang_reflect_RecordComponent::compute_offsets() { 5207 InstanceKlass* k = vmClasses::RecordComponent_klass(); 5208 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5209 } 5210 5211 #if INCLUDE_CDS 5212 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) { 5213 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5214 } 5215 #endif 5216 5217 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) { 5218 element->obj_field_put(_clazz_offset, value); 5219 } 5220 5221 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) { 5222 element->obj_field_put(_name_offset, value); 5223 } 5224 5225 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) { 5226 element->obj_field_put(_type_offset, value); 5227 } 5228 5229 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) { 5230 element->obj_field_put(_accessor_offset, value); 5231 } 5232 5233 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) { 5234 element->obj_field_put(_signature_offset, value); 5235 } 5236 5237 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) { 5238 element->obj_field_put(_annotations_offset, value); 5239 } 5240 5241 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) { 5242 element->obj_field_put(_typeAnnotations_offset, value); 5243 } 5244 5245 // java_lang_InternalError 5246 int java_lang_InternalError::_during_unsafe_access_offset; 5247 5248 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) { 5249 internal_error->bool_field_put(_during_unsafe_access_offset, true); 5250 } 5251 5252 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) { 5253 return internal_error->bool_field(_during_unsafe_access_offset); 5254 } 5255 5256 void java_lang_InternalError::compute_offsets() { 5257 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 5258 } 5259 5260 #if INCLUDE_CDS 5261 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) { 5262 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 5263 } 5264 #endif 5265 5266 #define BASIC_JAVA_CLASSES_DO_PART1(f) \ 5267 f(java_lang_Class) \ 5268 f(java_lang_String) \ 5269 f(java_lang_ref_Reference) \ 5270 //end 5271 5272 #define BASIC_JAVA_CLASSES_DO_PART2(f) \ 5273 f(java_lang_System) \ 5274 f(java_lang_ClassLoader) \ 5275 f(java_lang_Throwable) \ 5276 f(java_lang_Thread) \ 5277 f(java_lang_Thread_FieldHolder) \ 5278 f(java_lang_Thread_Constants) \ 5279 f(java_lang_ThreadGroup) \ 5280 f(java_lang_VirtualThread) \ 5281 f(java_lang_InternalError) \ 5282 f(java_lang_AssertionStatusDirectives) \ 5283 f(java_lang_ref_SoftReference) \ 5284 f(java_lang_invoke_MethodHandle) \ 5285 f(java_lang_invoke_DirectMethodHandle) \ 5286 f(java_lang_invoke_MemberName) \ 5287 f(java_lang_invoke_ResolvedMethodName) \ 5288 f(java_lang_invoke_LambdaForm) \ 5289 f(java_lang_invoke_MethodType) \ 5290 f(java_lang_invoke_CallSite) \ 5291 f(java_lang_invoke_ConstantCallSite) \ 5292 f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \ 5293 f(java_security_AccessControlContext) \ 5294 f(java_lang_reflect_AccessibleObject) \ 5295 f(java_lang_reflect_Method) \ 5296 f(java_lang_reflect_Constructor) \ 5297 f(java_lang_reflect_Field) \ 5298 f(java_lang_reflect_RecordComponent) \ 5299 f(reflect_ConstantPool) \ 5300 f(reflect_UnsafeStaticFieldAccessorImpl) \ 5301 f(java_lang_reflect_Parameter) \ 5302 f(java_lang_Module) \ 5303 f(java_lang_StackTraceElement) \ 5304 f(java_lang_StackFrameInfo) \ 5305 f(java_lang_LiveStackFrameInfo) \ 5306 f(jdk_internal_vm_ContinuationScope) \ 5307 f(jdk_internal_vm_Continuation) \ 5308 f(jdk_internal_vm_StackChunk) \ 5309 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \ 5310 f(jdk_internal_foreign_abi_NativeEntryPoint) \ 5311 f(jdk_internal_foreign_abi_ABIDescriptor) \ 5312 f(jdk_internal_foreign_abi_VMStorage) \ 5313 f(jdk_internal_foreign_abi_CallConv) \ 5314 f(jdk_internal_misc_UnsafeConstants) \ 5315 f(java_lang_boxing_object) \ 5316 f(vector_VectorPayload) \ 5317 //end 5318 5319 #define BASIC_JAVA_CLASSES_DO(f) \ 5320 BASIC_JAVA_CLASSES_DO_PART1(f) \ 5321 BASIC_JAVA_CLASSES_DO_PART2(f) 5322 5323 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets(); 5324 5325 // Compute field offsets of all the classes in this file 5326 void JavaClasses::compute_offsets() { 5327 if (UseSharedSpaces) { 5328 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() && 5329 JvmtiExport::has_early_class_hook_env()), 5330 "JavaClasses::compute_offsets() must be called in early JVMTI phase.")); 5331 // None of the classes used by the rest of this function can be replaced by 5332 // JVMTI ClassFileLoadHook. 5333 // We are safe to use the archived offsets, which have already been restored 5334 // by JavaClasses::serialize_offsets, without computing the offsets again. 5335 return; 5336 } 5337 5338 // We have already called the compute_offsets() of the 5339 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and 5340 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all() 5341 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS); 5342 } 5343 5344 #if INCLUDE_CDS 5345 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc); 5346 5347 void JavaClasses::serialize_offsets(SerializeClosure* soc) { 5348 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS); 5349 } 5350 #endif 5351 5352 #if INCLUDE_CDS_JAVA_HEAP 5353 bool JavaClasses::is_supported_for_archiving(oop obj) { 5354 Klass* klass = obj->klass(); 5355 5356 if (klass == vmClasses::ClassLoader_klass() || // ClassLoader::loader_data is malloc'ed. 5357 // The next 3 classes are used to implement java.lang.invoke, and are not used directly in 5358 // regular Java code. The implementation of java.lang.invoke uses generated hidden classes 5359 // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS. 5360 // So for now we cannot not support these classes for archiving. 5361 // 5362 // These objects typically are not referenced by static fields, but rather by resolved 5363 // constant pool entries, so excluding them shouldn't affect the archiving of static fields. 5364 klass == vmClasses::ResolvedMethodName_klass() || 5365 klass == vmClasses::MemberName_klass() || 5366 klass == vmClasses::Context_klass() || 5367 // It's problematic to archive Reference objects. One of the reasons is that 5368 // Reference::discovered may pull in unwanted objects (see JDK-8284336) 5369 klass->is_subclass_of(vmClasses::Reference_klass())) { 5370 return false; 5371 } 5372 5373 return true; 5374 } 5375 #endif 5376 5377 #ifndef PRODUCT 5378 5379 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check. 5380 5381 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name, 5382 const char* field_sig) { 5383 EXCEPTION_MARK; 5384 fieldDescriptor fd; 5385 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name); 5386 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 5387 InstanceKlass* ik = InstanceKlass::cast(k); 5388 TempNewSymbol f_name = SymbolTable::new_symbol(field_name); 5389 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig); 5390 if (!ik->find_local_field(f_name, f_sig, &fd)) { 5391 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 5392 return false; 5393 } 5394 if (fd.is_static()) { 5395 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 5396 return false; 5397 } 5398 if (fd.offset() == deserialized_offset ) { 5399 return true; 5400 } else { 5401 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.", 5402 klass_name, field_name, deserialized_offset, fd.offset()); 5403 return false; 5404 } 5405 } 5406 5407 void JavaClasses::check_offsets() { 5408 bool valid = true; 5409 5410 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 5411 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig) 5412 5413 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 5414 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig) 5415 5416 // Boxed primitive objects (java_lang_boxing_object) 5417 5418 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 5419 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 5420 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 5421 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 5422 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 5423 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 5424 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 5425 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 5426 5427 if (!valid) vm_exit_during_initialization("Field offset verification failed"); 5428 } 5429 5430 #endif // PRODUCT 5431 5432 int InjectedField::compute_offset() { 5433 InstanceKlass* ik = InstanceKlass::cast(klass()); 5434 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 5435 if (!may_be_java && !fs.field_flags().is_injected()) { 5436 // Only look at injected fields 5437 continue; 5438 } 5439 if (fs.name() == name() && fs.signature() == signature()) { 5440 return fs.offset(); 5441 } 5442 } 5443 ResourceMark rm; 5444 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)" : ""); 5445 #ifndef PRODUCT 5446 ik->print(); 5447 tty->print_cr("all fields:"); 5448 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 5449 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 5450 } 5451 #endif //PRODUCT 5452 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 5453 return -1; 5454 } 5455 5456 void javaClasses_init() { 5457 JavaClasses::compute_offsets(); 5458 JavaClasses::check_offsets(); 5459 FilteredFieldsMap::initialize(); // must be done after computing offsets. 5460 }