1 /* 2 * Copyright (c) 1997, 2023, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "cds/archiveBuilder.hpp" 27 #include "cds/archiveHeapLoader.hpp" 28 #include "cds/heapShared.hpp" 29 #include "cds/metaspaceShared.hpp" 30 #include "classfile/altHashing.hpp" 31 #include "classfile/classLoaderData.inline.hpp" 32 #include "classfile/javaClasses.inline.hpp" 33 #include "classfile/javaClassesImpl.hpp" 34 #include "classfile/javaThreadStatus.hpp" 35 #include "classfile/moduleEntry.hpp" 36 #include "classfile/stringTable.hpp" 37 #include "classfile/symbolTable.hpp" 38 #include "classfile/systemDictionary.hpp" 39 #include "classfile/vmClasses.hpp" 40 #include "classfile/vmSymbols.hpp" 41 #include "code/debugInfo.hpp" 42 #include "code/dependencyContext.hpp" 43 #include "code/pcDesc.hpp" 44 #include "gc/shared/collectedHeap.inline.hpp" 45 #include "interpreter/interpreter.hpp" 46 #include "interpreter/linkResolver.hpp" 47 #include "jvm.h" 48 #include "logging/log.hpp" 49 #include "logging/logStream.hpp" 50 #include "memory/oopFactory.hpp" 51 #include "memory/resourceArea.hpp" 52 #include "memory/universe.hpp" 53 #include "oops/fieldInfo.hpp" 54 #include "oops/fieldStreams.inline.hpp" 55 #include "oops/instanceKlass.inline.hpp" 56 #include "oops/instanceMirrorKlass.hpp" 57 #include "oops/klass.hpp" 58 #include "oops/klass.inline.hpp" 59 #include "oops/method.inline.hpp" 60 #include "oops/objArrayKlass.hpp" 61 #include "oops/objArrayOop.inline.hpp" 62 #include "oops/oopCast.inline.hpp" 63 #include "oops/oop.inline.hpp" 64 #include "oops/symbol.hpp" 65 #include "oops/recordComponent.hpp" 66 #include "oops/typeArrayOop.inline.hpp" 67 #include "prims/jvmtiExport.hpp" 68 #include "prims/methodHandles.hpp" 69 #include "prims/resolvedMethodTable.hpp" 70 #include "runtime/continuationEntry.inline.hpp" 71 #include "runtime/continuationJavaClasses.inline.hpp" 72 #include "runtime/fieldDescriptor.inline.hpp" 73 #include "runtime/frame.inline.hpp" 74 #include "runtime/handles.inline.hpp" 75 #include "runtime/handshake.hpp" 76 #include "runtime/init.hpp" 77 #include "runtime/interfaceSupport.inline.hpp" 78 #include "runtime/java.hpp" 79 #include "runtime/javaCalls.hpp" 80 #include "runtime/javaThread.hpp" 81 #include "runtime/jniHandles.inline.hpp" 82 #include "runtime/reflectionUtils.hpp" 83 #include "runtime/safepoint.hpp" 84 #include "runtime/safepointVerifiers.hpp" 85 #include "runtime/threadSMR.hpp" 86 #include "runtime/vframe.inline.hpp" 87 #include "runtime/vm_version.hpp" 88 #include "utilities/align.hpp" 89 #include "utilities/globalDefinitions.hpp" 90 #include "utilities/growableArray.hpp" 91 #include "utilities/preserveException.hpp" 92 #include "utilities/utf8.hpp" 93 #if INCLUDE_JVMCI 94 #include "jvmci/jvmciJavaClasses.hpp" 95 #endif 96 97 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 98 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 99 100 InjectedField JavaClasses::_injected_fields[] = { 101 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 102 }; 103 104 // Register native methods of Object 105 void java_lang_Object::register_natives(TRAPS) { 106 InstanceKlass* obj = vmClasses::Object_klass(); 107 Method::register_native(obj, vmSymbols::hashCode_name(), 108 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK); 109 Method::register_native(obj, vmSymbols::wait_name(), 110 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK); 111 Method::register_native(obj, vmSymbols::notify_name(), 112 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK); 113 Method::register_native(obj, vmSymbols::notifyAll_name(), 114 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK); 115 Method::register_native(obj, vmSymbols::clone_name(), 116 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD); 117 } 118 119 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 120 return _injected_fields[(int)id].compute_offset(); 121 } 122 123 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 124 *field_count = 0; 125 126 vmSymbolID sid = vmSymbols::find_sid(class_name); 127 if (sid == vmSymbolID::NO_SID) { 128 // Only well known classes can inject fields 129 return nullptr; 130 } 131 132 int count = 0; 133 int start = -1; 134 135 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 136 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \ 137 count++; \ 138 if (start == -1) { \ 139 start = (int)InjectedFieldID::klass##_##name##_enum; \ 140 } \ 141 } 142 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 143 #undef LOOKUP_INJECTED_FIELD 144 145 if (start != -1) { 146 *field_count = count; 147 return _injected_fields + start; 148 } 149 return nullptr; 150 } 151 152 153 // Helpful routine for computing field offsets at run time rather than hardcoding them 154 // Finds local fields only, including static fields. Static field offsets are from the 155 // beginning of the mirror. 156 void JavaClasses::compute_offset(int &dest_offset, 157 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol, 158 bool is_static) { 159 fieldDescriptor fd; 160 if (ik == nullptr) { 161 ResourceMark rm; 162 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string()); 163 vm_exit_during_initialization("Invalid layout of well-known class"); 164 } 165 166 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) { 167 ResourceMark rm; 168 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(), 169 name_symbol->as_C_string(), signature_symbol->as_C_string()); 170 #ifndef PRODUCT 171 // Prints all fields and offsets 172 Log(class) lt; 173 LogStream ls(lt.error()); 174 ik->print_on(&ls); 175 #endif //PRODUCT 176 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 177 } 178 dest_offset = fd.offset(); 179 } 180 181 // Overloading to pass name as a string. 182 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik, 183 const char* name_string, Symbol* signature_symbol, 184 bool is_static) { 185 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string)); 186 if (name == nullptr) { 187 ResourceMark rm; 188 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string); 189 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name()); 190 } 191 compute_offset(dest_offset, ik, name, signature_symbol, is_static); 192 } 193 194 // java_lang_String 195 196 int java_lang_String::_value_offset; 197 int java_lang_String::_hash_offset; 198 int java_lang_String::_hashIsZero_offset; 199 int java_lang_String::_coder_offset; 200 int java_lang_String::_flags_offset; 201 202 bool java_lang_String::_initialized; 203 204 205 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) { 206 uint8_t* addr = flags_addr(java_string); 207 uint8_t value = Atomic::load(addr); 208 while ((value & flag_mask) == 0) { 209 uint8_t old_value = value; 210 value |= flag_mask; 211 value = Atomic::cmpxchg(addr, old_value, value); 212 if (value == old_value) return false; // Flag bit changed from 0 to 1. 213 } 214 return true; // Flag bit is already 1. 215 } 216 217 #define STRING_FIELDS_DO(macro) \ 218 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \ 219 macro(_hash_offset, k, "hash", int_signature, false); \ 220 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \ 221 macro(_coder_offset, k, "coder", byte_signature, false); 222 223 void java_lang_String::compute_offsets() { 224 if (_initialized) { 225 return; 226 } 227 228 InstanceKlass* k = vmClasses::String_klass(); 229 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 230 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 231 232 _initialized = true; 233 } 234 235 #if INCLUDE_CDS 236 void java_lang_String::serialize_offsets(SerializeClosure* f) { 237 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 238 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 239 f->do_bool(&_initialized); 240 } 241 #endif 242 243 class CompactStringsFixup : public FieldClosure { 244 private: 245 bool _value; 246 247 public: 248 CompactStringsFixup(bool value) : _value(value) {} 249 250 void do_field(fieldDescriptor* fd) { 251 if (fd->name() == vmSymbols::compact_strings_name()) { 252 oop mirror = fd->field_holder()->java_mirror(); 253 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String"); 254 assert(mirror != nullptr, "String must have mirror already"); 255 mirror->bool_field_put(fd->offset(), _value); 256 } 257 } 258 }; 259 260 void java_lang_String::set_compact_strings(bool value) { 261 CompactStringsFixup fix(value); 262 vmClasses::String_klass()->do_local_static_fields(&fix); 263 } 264 265 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 266 assert(_initialized, "Must be initialized"); 267 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 268 269 // Create the String object first, so there's a chance that the String 270 // and the char array it points to end up in the same cache line. 271 oop obj; 272 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH); 273 274 // Create the char array. The String object must be handlized here 275 // because GC can happen as a result of the allocation attempt. 276 Handle h_obj(THREAD, obj); 277 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 278 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 279 280 // Point the String at the char array 281 obj = h_obj(); 282 set_value(obj, buffer); 283 // No need to zero the offset, allocation zero'ed the entire String object 284 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 285 return h_obj; 286 } 287 288 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) { 289 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 290 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 291 typeArrayOop buffer = value(h_obj()); 292 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 293 if (is_latin1) { 294 for (int index = 0; index < length; index++) { 295 buffer->byte_at_put(index, (jbyte)unicode[index]); 296 } 297 } else { 298 for (int index = 0; index < length; index++) { 299 buffer->char_at_put(index, unicode[index]); 300 } 301 } 302 303 #ifdef ASSERT 304 { 305 ResourceMark rm; 306 char* expected = UNICODE::as_utf8(unicode, length); 307 char* actual = as_utf8_string(h_obj()); 308 if (strcmp(expected, actual) != 0) { 309 fatal("Unicode conversion failure: %s --> %s", expected, actual); 310 } 311 } 312 #endif 313 314 return h_obj; 315 } 316 317 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) { 318 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL); 319 return h_obj(); 320 } 321 322 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 323 if (utf8_str == nullptr) { 324 return Handle(); 325 } 326 bool has_multibyte, is_latin1; 327 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 328 if (!CompactStrings) { 329 has_multibyte = true; 330 is_latin1 = false; 331 } 332 333 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 334 if (length > 0) { 335 if (!has_multibyte) { 336 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 337 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 338 } else if (is_latin1) { 339 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 340 } else { 341 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 342 } 343 } 344 345 #ifdef ASSERT 346 // This check is too strict when the input string is not a valid UTF8. 347 // For example, it may be created with arbitrary content via jni_NewStringUTF. 348 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, (int)strlen(utf8_str), false)) { 349 ResourceMark rm; 350 const char* expected = utf8_str; 351 char* actual = as_utf8_string(h_obj()); 352 if (strcmp(expected, actual) != 0) { 353 fatal("String conversion failure: %s --> %s", expected, actual); 354 } 355 } 356 #endif 357 358 return h_obj; 359 } 360 361 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 362 Handle h_obj = create_from_str(utf8_str, CHECK_NULL); 363 return h_obj(); 364 } 365 366 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 367 const char* utf8_str = (char*)symbol->bytes(); 368 int utf8_len = symbol->utf8_length(); 369 370 bool has_multibyte, is_latin1; 371 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 372 if (!CompactStrings) { 373 has_multibyte = true; 374 is_latin1 = false; 375 } 376 377 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 378 if (length > 0) { 379 if (!has_multibyte) { 380 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 381 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 382 } else if (is_latin1) { 383 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 384 } else { 385 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 386 } 387 } 388 389 #ifdef ASSERT 390 { 391 ResourceMark rm; 392 const char* expected = symbol->as_utf8(); 393 char* actual = as_utf8_string(h_obj()); 394 if (strncmp(expected, actual, utf8_len) != 0) { 395 fatal("Symbol conversion failure: %s --> %s", expected, actual); 396 } 397 } 398 #endif 399 400 return h_obj; 401 } 402 403 // Converts a C string to a Java String based on current encoding 404 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 405 assert(str != nullptr, "bad arguments"); 406 407 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *); 408 static to_java_string_fn_t _to_java_string_fn = nullptr; 409 410 if (_to_java_string_fn == nullptr) { 411 void *lib_handle = os::native_java_library(); 412 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform")); 413 #if defined(_WIN32) && !defined(_WIN64) 414 if (_to_java_string_fn == nullptr) { 415 // On 32 bit Windows, also try __stdcall decorated name 416 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8")); 417 } 418 #endif 419 if (_to_java_string_fn == nullptr) { 420 fatal("JNU_NewStringPlatform missing"); 421 } 422 } 423 424 jstring js = nullptr; 425 { 426 JavaThread* thread = THREAD; 427 HandleMark hm(thread); 428 ThreadToNativeFromVM ttn(thread); 429 js = (_to_java_string_fn)(thread->jni_environment(), str); 430 } 431 432 Handle native_platform_string(THREAD, JNIHandles::resolve(js)); 433 JNIHandles::destroy_local(js); // destroy local JNIHandle. 434 return native_platform_string; 435 } 436 437 // Converts a Java String to a native C string that can be used for 438 // native OS calls. 439 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 440 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 441 static to_platform_string_fn_t _to_platform_string_fn = nullptr; 442 443 if (_to_platform_string_fn == nullptr) { 444 void *lib_handle = os::native_java_library(); 445 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 446 if (_to_platform_string_fn == nullptr) { 447 fatal("GetStringPlatformChars missing"); 448 } 449 } 450 451 char *native_platform_string; 452 jstring js; 453 { JavaThread* thread = THREAD; 454 js = (jstring) JNIHandles::make_local(thread, java_string()); 455 HandleMark hm(thread); 456 ThreadToNativeFromVM ttn(thread); 457 JNIEnv *env = thread->jni_environment(); 458 bool is_copy; 459 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 460 assert(is_copy == JNI_TRUE, "is_copy value changed"); 461 } 462 463 // Uses a store barrier and therefore needs to be in vm state 464 JNIHandles::destroy_local(js); 465 466 return native_platform_string; 467 } 468 469 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) { 470 ResourceMark rm(THREAD); 471 return create_from_str(java_name->as_klass_external_name(), THREAD); 472 } 473 474 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 475 jchar* result = as_unicode_string_or_null(java_string, length); 476 if (result == nullptr) { 477 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 478 } 479 return result; 480 } 481 482 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) { 483 typeArrayOop value = java_lang_String::value(java_string); 484 length = java_lang_String::length(java_string, value); 485 bool is_latin1 = java_lang_String::is_latin1(java_string); 486 487 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 488 if (result != nullptr) { 489 if (!is_latin1) { 490 for (int index = 0; index < length; index++) { 491 result[index] = value->char_at(index); 492 } 493 } else { 494 for (int index = 0; index < length; index++) { 495 result[index] = ((jchar) value->byte_at(index)) & 0xff; 496 } 497 } 498 } 499 return result; 500 } 501 502 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) { 503 // The hash and hashIsZero fields are subject to a benign data race, 504 // making it crucial to ensure that any observable result of the 505 // calculation in this method stays correct under any possible read of 506 // these fields. Necessary restrictions to allow this to be correct 507 // without explicit memory fences or similar concurrency primitives is 508 // that we can ever only write to one of these two fields for a given 509 // String instance, and that the computation is idempotent and derived 510 // from immutable state 511 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized"); 512 if (java_lang_String::hash_is_set(java_string)) { 513 return java_string->int_field(_hash_offset); 514 } 515 516 typeArrayOop value = java_lang_String::value(java_string); 517 int length = java_lang_String::length(java_string, value); 518 bool is_latin1 = java_lang_String::is_latin1(java_string); 519 520 unsigned int hash = 0; 521 if (length > 0) { 522 if (is_latin1) { 523 hash = java_lang_String::hash_code(value->byte_at_addr(0), length); 524 } else { 525 hash = java_lang_String::hash_code(value->char_at_addr(0), length); 526 } 527 } 528 529 if (update) { 530 if (hash != 0) { 531 java_string->int_field_put(_hash_offset, hash); 532 } else { 533 java_string->bool_field_put(_hashIsZero_offset, true); 534 } 535 } 536 return hash; 537 } 538 539 unsigned int java_lang_String::hash_code(oop java_string) { 540 return hash_code_impl(java_string, /*update=*/true); 541 } 542 543 unsigned int java_lang_String::hash_code_noupdate(oop java_string) { 544 return hash_code_impl(java_string, /*update=*/false); 545 } 546 547 548 char* java_lang_String::as_quoted_ascii(oop java_string) { 549 typeArrayOop value = java_lang_String::value(java_string); 550 int length = java_lang_String::length(java_string, value); 551 bool is_latin1 = java_lang_String::is_latin1(java_string); 552 553 if (length == 0) return nullptr; 554 555 char* result; 556 int result_length; 557 if (!is_latin1) { 558 jchar* base = value->char_at_addr(0); 559 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 560 result = NEW_RESOURCE_ARRAY(char, result_length); 561 UNICODE::as_quoted_ascii(base, length, result, result_length); 562 } else { 563 jbyte* base = value->byte_at_addr(0); 564 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 565 result = NEW_RESOURCE_ARRAY(char, result_length); 566 UNICODE::as_quoted_ascii(base, length, result, result_length); 567 } 568 assert(result_length >= length + 1, "must not be shorter"); 569 assert(result_length == (int)strlen(result) + 1, "must match"); 570 return result; 571 } 572 573 Symbol* java_lang_String::as_symbol(oop java_string) { 574 typeArrayOop value = java_lang_String::value(java_string); 575 int length = java_lang_String::length(java_string, value); 576 bool is_latin1 = java_lang_String::is_latin1(java_string); 577 if (!is_latin1) { 578 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0); 579 Symbol* sym = SymbolTable::new_symbol(base, length); 580 return sym; 581 } else { 582 ResourceMark rm; 583 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 584 const char* base = UNICODE::as_utf8(position, length); 585 Symbol* sym = SymbolTable::new_symbol(base, length); 586 return sym; 587 } 588 } 589 590 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 591 typeArrayOop value = java_lang_String::value(java_string); 592 int length = java_lang_String::length(java_string, value); 593 bool is_latin1 = java_lang_String::is_latin1(java_string); 594 if (!is_latin1) { 595 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0); 596 return SymbolTable::probe_unicode(base, length); 597 } else { 598 ResourceMark rm; 599 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 600 const char* base = UNICODE::as_utf8(position, length); 601 return SymbolTable::probe(base, length); 602 } 603 } 604 605 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) { 606 assert(value_equals(value, java_lang_String::value(java_string)), 607 "value must be same as java_lang_String::value(java_string)"); 608 int length = java_lang_String::length(java_string, value); 609 if (length == 0) { 610 return 0; 611 } 612 if (!java_lang_String::is_latin1(java_string)) { 613 return UNICODE::utf8_length(value->char_at_addr(0), length); 614 } else { 615 return UNICODE::utf8_length(value->byte_at_addr(0), length); 616 } 617 } 618 619 int java_lang_String::utf8_length(oop java_string) { 620 typeArrayOop value = java_lang_String::value(java_string); 621 return utf8_length(java_string, value); 622 } 623 624 char* java_lang_String::as_utf8_string(oop java_string) { 625 int length; 626 return as_utf8_string(java_string, length); 627 } 628 629 char* java_lang_String::as_utf8_string(oop java_string, int& length) { 630 typeArrayOop value = java_lang_String::value(java_string); 631 length = java_lang_String::length(java_string, value); 632 bool is_latin1 = java_lang_String::is_latin1(java_string); 633 if (!is_latin1) { 634 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0); 635 return UNICODE::as_utf8(position, length); 636 } else { 637 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 638 return UNICODE::as_utf8(position, length); 639 } 640 } 641 642 // Uses a provided buffer if it's sufficiently large, otherwise allocates 643 // a resource array to fit 644 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, int buflen, int& utf8_len) { 645 typeArrayOop value = java_lang_String::value(java_string); 646 int len = java_lang_String::length(java_string, value); 647 bool is_latin1 = java_lang_String::is_latin1(java_string); 648 if (!is_latin1) { 649 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0); 650 utf8_len = UNICODE::utf8_length(position, len); 651 if (utf8_len >= buflen) { 652 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 653 } 654 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 655 } else { 656 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0); 657 utf8_len = UNICODE::utf8_length(position, len); 658 if (utf8_len >= buflen) { 659 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 660 } 661 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 662 } 663 } 664 665 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) { 666 assert(value_equals(value, java_lang_String::value(java_string)), 667 "value must be same as java_lang_String::value(java_string)"); 668 int length = java_lang_String::length(java_string, value); 669 bool is_latin1 = java_lang_String::is_latin1(java_string); 670 if (!is_latin1) { 671 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0); 672 return UNICODE::as_utf8(position, length, buf, buflen); 673 } else { 674 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 675 return UNICODE::as_utf8(position, length, buf, buflen); 676 } 677 } 678 679 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 680 typeArrayOop value = java_lang_String::value(java_string); 681 return as_utf8_string(java_string, value, buf, buflen); 682 } 683 684 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 685 typeArrayOop value = java_lang_String::value(java_string); 686 bool is_latin1 = java_lang_String::is_latin1(java_string); 687 assert(start + len <= java_lang_String::length(java_string), "just checking"); 688 if (!is_latin1) { 689 jchar* position = value->char_at_addr(start); 690 return UNICODE::as_utf8(position, len); 691 } else { 692 jbyte* position = value->byte_at_addr(start); 693 return UNICODE::as_utf8(position, len); 694 } 695 } 696 697 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) { 698 assert(value_equals(value, java_lang_String::value(java_string)), 699 "value must be same as java_lang_String::value(java_string)"); 700 assert(start + len <= java_lang_String::length(java_string), "just checking"); 701 bool is_latin1 = java_lang_String::is_latin1(java_string); 702 if (!is_latin1) { 703 jchar* position = value->char_at_addr(start); 704 return UNICODE::as_utf8(position, len, buf, buflen); 705 } else { 706 jbyte* position = value->byte_at_addr(start); 707 return UNICODE::as_utf8(position, len, buf, buflen); 708 } 709 } 710 711 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) { 712 assert(java_string->klass() == vmClasses::String_klass(), 713 "must be java_string"); 714 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 715 int length = java_lang_String::length(java_string, value); 716 if (length != len) { 717 return false; 718 } 719 bool is_latin1 = java_lang_String::is_latin1(java_string); 720 if (!is_latin1) { 721 for (int i = 0; i < len; i++) { 722 if (value->char_at(i) != chars[i]) { 723 return false; 724 } 725 } 726 } else { 727 for (int i = 0; i < len; i++) { 728 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 729 return false; 730 } 731 } 732 } 733 return true; 734 } 735 736 bool java_lang_String::equals(oop str1, oop str2) { 737 assert(str1->klass() == vmClasses::String_klass(), 738 "must be java String"); 739 assert(str2->klass() == vmClasses::String_klass(), 740 "must be java String"); 741 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1); 742 bool is_latin1 = java_lang_String::is_latin1(str1); 743 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2); 744 bool is_latin2 = java_lang_String::is_latin1(str2); 745 746 if (is_latin1 != is_latin2) { 747 // Strings with different coders are never equal. 748 return false; 749 } 750 return value_equals(value1, value2); 751 } 752 753 void java_lang_String::print(oop java_string, outputStream* st) { 754 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string"); 755 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 756 757 if (value == nullptr) { 758 // This can happen if, e.g., printing a String 759 // object before its initializer has been called 760 st->print("nullptr"); 761 return; 762 } 763 764 int length = java_lang_String::length(java_string, value); 765 bool is_latin1 = java_lang_String::is_latin1(java_string); 766 767 st->print("\""); 768 for (int index = 0; index < length; index++) { 769 jchar c = (!is_latin1) ? value->char_at(index) : 770 ((jchar) value->byte_at(index)) & 0xff; 771 if (c < ' ') { 772 st->print("\\x%02X", c); // print control characters e.g. \x0A 773 } else { 774 st->print("%c", c); 775 } 776 } 777 st->print("\""); 778 } 779 780 // java_lang_Class 781 782 int java_lang_Class::_klass_offset; 783 int java_lang_Class::_array_klass_offset; 784 int java_lang_Class::_oop_size_offset; 785 int java_lang_Class::_static_oop_field_count_offset; 786 int java_lang_Class::_class_loader_offset; 787 int java_lang_Class::_module_offset; 788 int java_lang_Class::_protection_domain_offset; 789 int java_lang_Class::_component_mirror_offset; 790 int java_lang_Class::_signers_offset; 791 int java_lang_Class::_name_offset; 792 int java_lang_Class::_source_file_offset; 793 int java_lang_Class::_classData_offset; 794 int java_lang_Class::_classRedefinedCount_offset; 795 796 bool java_lang_Class::_offsets_computed = false; 797 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr; 798 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr; 799 800 #ifdef ASSERT 801 inline static void assert_valid_static_string_field(fieldDescriptor* fd) { 802 assert(fd->has_initial_value(), "caller should have checked this"); 803 assert(fd->field_type() == T_OBJECT, "caller should have checked this"); 804 // Can't use vmSymbols::string_signature() as fd->signature() may have been relocated 805 // during DumpSharedSpaces 806 assert(fd->signature()->equals("Ljava/lang/String;"), "just checking"); 807 } 808 #endif 809 810 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 811 DEBUG_ONLY(assert_valid_static_string_field(fd);) 812 oop string = fd->string_initial_value(CHECK); 813 mirror()->obj_field_put(fd->offset(), string); 814 } 815 816 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) { 817 assert(fd->has_initial_value(), "caller should have checked this"); 818 BasicType t = fd->field_type(); 819 switch (t) { 820 case T_BYTE: 821 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value())); 822 break; 823 case T_BOOLEAN: 824 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value())); 825 break; 826 case T_CHAR: 827 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value())); 828 break; 829 case T_SHORT: 830 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value())); 831 break; 832 case T_INT: 833 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 834 break; 835 case T_FLOAT: 836 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 837 break; 838 case T_DOUBLE: 839 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 840 break; 841 case T_LONG: 842 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 843 break; 844 default: 845 // Illegal ConstantValue attribute in class file should have been 846 // caught during classfile parsing. 847 ShouldNotReachHere(); 848 } 849 } 850 851 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 852 assert(mirror.not_null() && fd->is_static(), "just checking"); 853 if (fd->has_initial_value()) { 854 if (fd->field_type() != T_OBJECT) { 855 initialize_static_primitive_field(fd, mirror); 856 } else { 857 initialize_static_string_field(fd, mirror, CHECK); 858 } 859 } 860 } 861 862 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 863 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 864 865 // If the offset was read from the shared archive, it was fixed up already 866 if (!k->is_shared()) { 867 if (k->is_instance_klass()) { 868 // During bootstrap, java.lang.Class wasn't loaded so static field 869 // offsets were computed without the size added it. Go back and 870 // update all the static field offsets to included the size. 871 872 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow 873 // content updates. So the FieldInfo stream has to be decompressed into a temporary array, 874 // static fields offsets are updated in this array before reencoding everything into 875 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream. 876 877 int java_fields; 878 int injected_fields; 879 InstanceKlass* ik = InstanceKlass::cast(k); 880 GrowableArray<FieldInfo>* fields = 881 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(), 882 &java_fields, &injected_fields); 883 for (int i = 0; i < fields->length(); i++) { 884 FieldInfo* fi = fields->adr_at(i); 885 if (fi->access_flags().is_static()) { 886 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields()); 887 } 888 } 889 Array<u1>* old_stream = ik->fieldinfo_stream(); 890 assert(fields->length() == (java_fields + injected_fields), "Must be"); 891 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK); 892 ik->set_fieldinfo_stream(new_fis); 893 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream); 894 } 895 } 896 897 if (k->is_shared() && k->has_archived_mirror_index()) { 898 if (ArchiveHeapLoader::is_in_use()) { 899 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK); 900 assert(present, "Missing archived mirror for %s", k->external_name()); 901 return; 902 } else { 903 k->clear_java_mirror_handle(); 904 k->clear_archived_mirror_index(); 905 } 906 } 907 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK); 908 } 909 910 void java_lang_Class::initialize_mirror_fields(Klass* k, 911 Handle mirror, 912 Handle protection_domain, 913 Handle classData, 914 TRAPS) { 915 // Set protection domain also 916 set_protection_domain(mirror(), protection_domain()); 917 918 // Initialize static fields 919 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 920 921 // Set classData 922 set_class_data(mirror(), classData()); 923 } 924 925 // Set the java.lang.Module module field in the java_lang_Class mirror 926 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) { 927 if (module.is_null()) { 928 // During startup, the module may be null only if java.base has not been defined yet. 929 // Put the class on the fixup_module_list to patch later when the java.lang.Module 930 // for java.base is known. But note that since we captured the null module another 931 // thread may have completed that initialization. 932 933 bool javabase_was_defined = false; 934 { 935 MutexLocker m1(current, Module_lock); 936 // Keep list of classes needing java.base module fixup 937 if (!ModuleEntryTable::javabase_defined()) { 938 assert(k->java_mirror() != nullptr, "Class's mirror is null"); 939 k->class_loader_data()->inc_keep_alive(); 940 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized"); 941 fixup_module_field_list()->push(k); 942 } else { 943 javabase_was_defined = true; 944 } 945 } 946 947 // If java.base was already defined then patch this particular class with java.base. 948 if (javabase_was_defined) { 949 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 950 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr, 951 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 952 Handle javabase_handle(current, javabase_entry->module()); 953 set_module(mirror(), javabase_handle()); 954 } 955 } else { 956 assert(Universe::is_module_initialized() || 957 (ModuleEntryTable::javabase_defined() && 958 (module() == ModuleEntryTable::javabase_moduleEntry()->module())), 959 "Incorrect java.lang.Module specification while creating mirror"); 960 set_module(mirror(), module()); 961 } 962 } 963 964 // Statically allocate fixup lists because they always get created. 965 void java_lang_Class::allocate_fixup_lists() { 966 GrowableArray<Klass*>* mirror_list = 967 new (mtClass) GrowableArray<Klass*>(40, mtClass); 968 set_fixup_mirror_list(mirror_list); 969 970 GrowableArray<Klass*>* module_list = 971 new (mtModule) GrowableArray<Klass*>(500, mtModule); 972 set_fixup_module_field_list(module_list); 973 } 974 975 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData, 976 Handle& mirror, Handle& comp_mirror, TRAPS) { 977 // Allocate mirror (java.lang.Class instance) 978 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK); 979 mirror = Handle(THREAD, mirror_oop); 980 981 // Setup indirection from mirror->klass 982 set_klass(mirror(), k); 983 984 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 985 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 986 987 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 988 989 // It might also have a component mirror. This mirror must already exist. 990 if (k->is_array_klass()) { 991 if (k->is_typeArray_klass()) { 992 BasicType type = TypeArrayKlass::cast(k)->element_type(); 993 if (is_scratch) { 994 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type)); 995 } else { 996 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 997 } 998 } else { 999 assert(k->is_objArray_klass(), "Must be"); 1000 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1001 assert(element_klass != nullptr, "Must have an element klass"); 1002 if (is_scratch) { 1003 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass)); 1004 } else { 1005 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 1006 } 1007 } 1008 assert(comp_mirror() != nullptr, "must have a mirror"); 1009 1010 // Two-way link between the array klass and its component mirror: 1011 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 1012 set_component_mirror(mirror(), comp_mirror()); 1013 // See below for ordering dependencies between field array_klass in component mirror 1014 // and java_mirror in this klass. 1015 } else { 1016 assert(k->is_instance_klass(), "Must be"); 1017 1018 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD); 1019 if (HAS_PENDING_EXCEPTION) { 1020 // If any of the fields throws an exception like OOM remove the klass field 1021 // from the mirror so GC doesn't follow it after the klass has been deallocated. 1022 // This mirror looks like a primitive type, which logically it is because it 1023 // it represents no class. 1024 set_klass(mirror(), nullptr); 1025 return; 1026 } 1027 } 1028 } 1029 1030 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 1031 Handle module, Handle protection_domain, 1032 Handle classData, TRAPS) { 1033 assert(k != nullptr, "Use create_basic_type_mirror for primitive types"); 1034 assert(k->java_mirror() == nullptr, "should only assign mirror once"); 1035 1036 // Use this moment of initialization to cache modifier_flags also, 1037 // to support Class.getModifiers(). Instance classes recalculate 1038 // the cached flags after the class file is parsed, but before the 1039 // class is put into the system dictionary. 1040 int computed_modifiers = k->compute_modifier_flags(); 1041 k->set_modifier_flags(computed_modifiers); 1042 // Class_klass has to be loaded because it is used to allocate 1043 // the mirror. 1044 if (vmClasses::Class_klass_loaded()) { 1045 Handle mirror; 1046 Handle comp_mirror; 1047 1048 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK); 1049 1050 // set the classLoader field in the java_lang_Class instance 1051 assert(class_loader() == k->class_loader(), "should be same"); 1052 set_class_loader(mirror(), class_loader()); 1053 1054 // Setup indirection from klass->mirror 1055 // after any exceptions can happen during allocations. 1056 k->set_java_mirror(mirror); 1057 1058 // Set the module field in the java_lang_Class instance. This must be done 1059 // after the mirror is set. 1060 set_mirror_module_field(THREAD, k, mirror, module); 1061 1062 if (comp_mirror() != nullptr) { 1063 // Set after k->java_mirror() is published, because compiled code running 1064 // concurrently doesn't expect a k to have a null java_mirror. 1065 release_set_array_klass(comp_mirror(), k); 1066 } 1067 if (DumpSharedSpaces) { 1068 create_scratch_mirror(k, CHECK); 1069 } 1070 } else { 1071 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized"); 1072 fixup_mirror_list()->push(k); 1073 } 1074 } 1075 1076 #if INCLUDE_CDS_JAVA_HEAP 1077 // The "scratch mirror" stores the states of the mirror object that can be 1078 // decided at dump time (such as the initial values of the static fields, the 1079 // component mirror, etc). At runtime, more information is added to it by 1080 // java_lang_Class::restore_archived_mirror(). 1081 // 1082 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror() 1083 // produces the same result as /*runtime*/create_mirror(). 1084 // 1085 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the 1086 // latter may contain dumptime-specific information that cannot be archived 1087 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution). 1088 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) { 1089 if (k->class_loader() != nullptr && 1090 k->class_loader() != SystemDictionary::java_platform_loader() && 1091 k->class_loader() != SystemDictionary::java_system_loader()) { 1092 // We only archive the mirrors of classes loaded by the built-in loaders 1093 return; 1094 } 1095 1096 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime 1097 Handle mirror; 1098 Handle comp_mirror; 1099 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK); 1100 1101 if (comp_mirror() != nullptr) { 1102 release_set_array_klass(comp_mirror(), k); 1103 } 1104 1105 HeapShared::set_scratch_java_mirror(k, mirror()); 1106 } 1107 1108 // Returns true if the mirror is updated, false if no archived mirror 1109 // data is present. After the archived mirror object is restored, the 1110 // shared klass' _has_raw_archived_mirror flag is cleared. 1111 bool java_lang_Class::restore_archived_mirror(Klass *k, 1112 Handle class_loader, Handle module, 1113 Handle protection_domain, TRAPS) { 1114 // Postpone restoring archived mirror until java.lang.Class is loaded. Please 1115 // see more details in vmClasses::resolve_all(). 1116 if (!vmClasses::Class_klass_loaded()) { 1117 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized"); 1118 fixup_mirror_list()->push(k); 1119 return true; 1120 } 1121 1122 oop m = k->archived_java_mirror(); 1123 assert(m != nullptr, "must have stored non-null archived mirror"); 1124 1125 // Sanity: clear it now to prevent re-initialization if any of the following fails 1126 k->clear_archived_mirror_index(); 1127 1128 // mirror is archived, restore 1129 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m)); 1130 assert(as_Klass(m) == k, "must be"); 1131 Handle mirror(THREAD, m); 1132 1133 if (!k->is_array_klass()) { 1134 // - local static final fields with initial values were initialized at dump time 1135 1136 if (protection_domain.not_null()) { 1137 set_protection_domain(mirror(), protection_domain()); 1138 } 1139 } 1140 1141 assert(class_loader() == k->class_loader(), "should be same"); 1142 if (class_loader.not_null()) { 1143 set_class_loader(mirror(), class_loader()); 1144 } 1145 1146 k->set_java_mirror(mirror); 1147 1148 set_mirror_module_field(THREAD, k, mirror, module); 1149 1150 if (log_is_enabled(Trace, cds, heap, mirror)) { 1151 ResourceMark rm(THREAD); 1152 log_trace(cds, heap, mirror)( 1153 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1154 } 1155 1156 return true; 1157 } 1158 #endif // INCLUDE_CDS_JAVA_HEAP 1159 1160 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1161 assert(_module_offset != 0, "must have been computed already"); 1162 set_module(k->java_mirror(), module()); 1163 } 1164 1165 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) { 1166 assert(_oop_size_offset != 0, "must be set"); 1167 assert(size > 0, "Oop size must be greater than zero, not " SIZE_FORMAT, size); 1168 assert(size <= INT_MAX, "Lossy conversion: " SIZE_FORMAT, size); 1169 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size; 1170 } 1171 1172 int java_lang_Class::static_oop_field_count(oop java_class) { 1173 assert(_static_oop_field_count_offset != 0, "must be set"); 1174 return java_class->int_field(_static_oop_field_count_offset); 1175 } 1176 1177 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1178 assert(_static_oop_field_count_offset != 0, "must be set"); 1179 java_class->int_field_put(_static_oop_field_count_offset, size); 1180 } 1181 1182 oop java_lang_Class::protection_domain(oop java_class) { 1183 assert(_protection_domain_offset != 0, "must be set"); 1184 return java_class->obj_field(_protection_domain_offset); 1185 } 1186 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1187 assert(_protection_domain_offset != 0, "must be set"); 1188 java_class->obj_field_put(_protection_domain_offset, pd); 1189 } 1190 1191 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1192 assert(_component_mirror_offset != 0, "must be set"); 1193 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1194 } 1195 oop java_lang_Class::component_mirror(oop java_class) { 1196 assert(_component_mirror_offset != 0, "must be set"); 1197 return java_class->obj_field(_component_mirror_offset); 1198 } 1199 1200 objArrayOop java_lang_Class::signers(oop java_class) { 1201 assert(_signers_offset != 0, "must be set"); 1202 return (objArrayOop)java_class->obj_field(_signers_offset); 1203 } 1204 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 1205 assert(_signers_offset != 0, "must be set"); 1206 java_class->obj_field_put(_signers_offset, signers); 1207 } 1208 1209 oop java_lang_Class::class_data(oop java_class) { 1210 assert(_classData_offset != 0, "must be set"); 1211 return java_class->obj_field(_classData_offset); 1212 } 1213 void java_lang_Class::set_class_data(oop java_class, oop class_data) { 1214 assert(_classData_offset != 0, "must be set"); 1215 java_class->obj_field_put(_classData_offset, class_data); 1216 } 1217 1218 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1219 assert(_class_loader_offset != 0, "offsets should have been initialized"); 1220 java_class->obj_field_put(_class_loader_offset, loader); 1221 } 1222 1223 oop java_lang_Class::class_loader(oop java_class) { 1224 assert(_class_loader_offset != 0, "must be set"); 1225 return java_class->obj_field(_class_loader_offset); 1226 } 1227 1228 oop java_lang_Class::module(oop java_class) { 1229 assert(_module_offset != 0, "must be set"); 1230 return java_class->obj_field(_module_offset); 1231 } 1232 1233 void java_lang_Class::set_module(oop java_class, oop module) { 1234 assert(_module_offset != 0, "must be set"); 1235 java_class->obj_field_put(_module_offset, module); 1236 } 1237 1238 oop java_lang_Class::name(Handle java_class, TRAPS) { 1239 assert(_name_offset != 0, "must be set"); 1240 oop o = java_class->obj_field(_name_offset); 1241 if (o == nullptr) { 1242 o = StringTable::intern(as_external_name(java_class()), THREAD); 1243 java_class->obj_field_put(_name_offset, o); 1244 } 1245 return o; 1246 } 1247 1248 oop java_lang_Class::source_file(oop java_class) { 1249 assert(_source_file_offset != 0, "must be set"); 1250 return java_class->obj_field(_source_file_offset); 1251 } 1252 1253 void java_lang_Class::set_source_file(oop java_class, oop source_file) { 1254 assert(_source_file_offset != 0, "must be set"); 1255 java_class->obj_field_put(_source_file_offset, source_file); 1256 } 1257 1258 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1259 // This should be improved by adding a field at the Java level or by 1260 // introducing a new VM klass (see comment in ClassFileParser) 1261 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL); 1262 if (type != T_VOID) { 1263 Klass* aklass = Universe::typeArrayKlassObj(type); 1264 assert(aklass != nullptr, "correct bootstrap"); 1265 release_set_array_klass(java_class, aklass); 1266 } 1267 #ifdef ASSERT 1268 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass()); 1269 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1270 #endif 1271 return java_class; 1272 } 1273 1274 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1275 assert(is_instance(java_class), "must be a Class object"); 1276 java_class->metadata_field_put(_klass_offset, klass); 1277 } 1278 1279 1280 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1281 assert(is_instance(java_class), "must be a Class object"); 1282 Symbol* name = nullptr; 1283 bool is_instance = false; 1284 if (is_primitive(java_class)) { 1285 name = vmSymbols::type_signature(primitive_type(java_class)); 1286 } else { 1287 Klass* k = as_Klass(java_class); 1288 is_instance = k->is_instance_klass(); 1289 name = k->name(); 1290 } 1291 if (name == nullptr) { 1292 st->print("<null>"); 1293 return; 1294 } 1295 if (is_instance) st->print("L"); 1296 st->write((char*) name->base(), (int) name->utf8_length()); 1297 if (is_instance) st->print(";"); 1298 } 1299 1300 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) { 1301 assert(is_instance(java_class), "must be a Class object"); 1302 Symbol* name; 1303 if (is_primitive(java_class)) { 1304 name = vmSymbols::type_signature(primitive_type(java_class)); 1305 // Because this can create a new symbol, the caller has to decrement 1306 // the refcount, so make adjustment here and below for symbols returned 1307 // that are not created or incremented due to a successful lookup. 1308 name->increment_refcount(); 1309 } else { 1310 Klass* k = as_Klass(java_class); 1311 if (!k->is_instance_klass()) { 1312 name = k->name(); 1313 name->increment_refcount(); 1314 } else { 1315 ResourceMark rm; 1316 const char* sigstr = k->signature_name(); 1317 int siglen = (int) strlen(sigstr); 1318 if (!intern_if_not_found) { 1319 name = SymbolTable::probe(sigstr, siglen); 1320 } else { 1321 name = SymbolTable::new_symbol(sigstr, siglen); 1322 } 1323 } 1324 } 1325 return name; 1326 } 1327 1328 // Returns the Java name for this Java mirror (Resource allocated) 1329 // See Klass::external_name(). 1330 // For primitive type Java mirrors, its type name is returned. 1331 const char* java_lang_Class::as_external_name(oop java_class) { 1332 assert(is_instance(java_class), "must be a Class object"); 1333 const char* name = nullptr; 1334 if (is_primitive(java_class)) { 1335 name = type2name(primitive_type(java_class)); 1336 } else { 1337 name = as_Klass(java_class)->external_name(); 1338 } 1339 if (name == nullptr) { 1340 name = "<null>"; 1341 } 1342 return name; 1343 } 1344 1345 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1346 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1347 assert(k == nullptr || k->is_klass() && k->is_array_klass(), "should be array klass"); 1348 return k; 1349 } 1350 1351 1352 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1353 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1354 java_class->release_metadata_field_put(_array_klass_offset, klass); 1355 } 1356 1357 1358 BasicType java_lang_Class::primitive_type(oop java_class) { 1359 assert(is_primitive(java_class), "just checking"); 1360 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1361 BasicType type = T_VOID; 1362 if (ak != nullptr) { 1363 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1364 type = ArrayKlass::cast(ak)->element_type(); 1365 } else { 1366 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1367 } 1368 #ifdef ASSERT 1369 if (DumpSharedSpaces) { 1370 oop mirror = Universe::java_mirror(type); 1371 oop scratch_mirror = HeapShared::scratch_java_mirror(type); 1372 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent"); 1373 } else { 1374 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1375 } 1376 #endif 1377 return type; 1378 } 1379 1380 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1381 assert(is_instance(java_class), "must be a Class object"); 1382 if (is_primitive(java_class)) { 1383 if (reference_klass != nullptr) 1384 (*reference_klass) = nullptr; 1385 return primitive_type(java_class); 1386 } else { 1387 if (reference_klass != nullptr) 1388 (*reference_klass) = as_Klass(java_class); 1389 return T_OBJECT; 1390 } 1391 } 1392 1393 1394 oop java_lang_Class::primitive_mirror(BasicType t) { 1395 oop mirror = Universe::java_mirror(t); 1396 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class"); 1397 assert(is_primitive(mirror), "must be primitive"); 1398 return mirror; 1399 } 1400 1401 #define CLASS_FIELDS_DO(macro) \ 1402 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \ 1403 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1404 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1405 macro(_module_offset, k, "module", module_signature, false); \ 1406 macro(_name_offset, k, "name", string_signature, false); \ 1407 macro(_classData_offset, k, "classData", object_signature, false); 1408 1409 void java_lang_Class::compute_offsets() { 1410 if (_offsets_computed) { 1411 return; 1412 } 1413 1414 _offsets_computed = true; 1415 1416 InstanceKlass* k = vmClasses::Class_klass(); 1417 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1418 1419 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1420 } 1421 1422 #if INCLUDE_CDS 1423 void java_lang_Class::serialize_offsets(SerializeClosure* f) { 1424 f->do_bool(&_offsets_computed); 1425 1426 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1427 1428 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1429 } 1430 #endif 1431 1432 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1433 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1434 return the_class_mirror->int_field(_classRedefinedCount_offset); 1435 } 1436 1437 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1438 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1439 the_class_mirror->int_field_put(_classRedefinedCount_offset, value); 1440 } 1441 1442 1443 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1444 // platform thread structure, and a eetop offset which was used for thread 1445 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1446 // merged, so in the HotSpot VM we just use the eetop field for the thread 1447 // instead of the privateInfo_offset. 1448 // 1449 // Note: The stackSize field is only present starting in 1.4. 1450 1451 int java_lang_Thread_FieldHolder::_group_offset; 1452 int java_lang_Thread_FieldHolder::_priority_offset; 1453 int java_lang_Thread_FieldHolder::_stackSize_offset; 1454 int java_lang_Thread_FieldHolder::_daemon_offset; 1455 int java_lang_Thread_FieldHolder::_thread_status_offset; 1456 1457 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \ 1458 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1459 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1460 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1461 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1462 macro(_thread_status_offset, k, "threadStatus", int_signature, false) 1463 1464 void java_lang_Thread_FieldHolder::compute_offsets() { 1465 assert(_group_offset == 0, "offsets should be initialized only once"); 1466 1467 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass(); 1468 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1469 } 1470 1471 #if INCLUDE_CDS 1472 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) { 1473 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1474 } 1475 #endif 1476 1477 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) { 1478 return holder->obj_field(_group_offset); 1479 } 1480 1481 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) { 1482 return (ThreadPriority)holder->int_field(_priority_offset); 1483 } 1484 1485 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) { 1486 holder->int_field_put(_priority_offset, priority); 1487 } 1488 1489 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) { 1490 return holder->long_field(_stackSize_offset); 1491 } 1492 1493 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) { 1494 return holder->bool_field(_daemon_offset) != 0; 1495 } 1496 1497 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) { 1498 assert(val, "daemon status is never turned off"); 1499 holder->bool_field_put(_daemon_offset, val); 1500 } 1501 1502 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) { 1503 holder->int_field_put(_thread_status_offset, static_cast<int>(status)); 1504 } 1505 1506 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) { 1507 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset)); 1508 } 1509 1510 1511 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0; 1512 1513 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \ 1514 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true); 1515 1516 void java_lang_Thread_Constants::compute_offsets() { 1517 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once"); 1518 1519 InstanceKlass* k = vmClasses::Thread_Constants_klass(); 1520 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1521 } 1522 1523 #if INCLUDE_CDS 1524 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) { 1525 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1526 } 1527 #endif 1528 1529 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() { 1530 InstanceKlass* k = vmClasses::Thread_Constants_klass(); 1531 oop base = k->static_field_base_raw(); 1532 return base->obj_field(_static_VTHREAD_GROUP_offset); 1533 } 1534 1535 1536 int java_lang_Thread::_holder_offset; 1537 int java_lang_Thread::_name_offset; 1538 int java_lang_Thread::_contextClassLoader_offset; 1539 int java_lang_Thread::_inheritedAccessControlContext_offset; 1540 int java_lang_Thread::_eetop_offset; 1541 int java_lang_Thread::_jvmti_thread_state_offset; 1542 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset; 1543 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset; 1544 int java_lang_Thread::_interrupted_offset; 1545 int java_lang_Thread::_tid_offset; 1546 int java_lang_Thread::_continuation_offset; 1547 int java_lang_Thread::_park_blocker_offset; 1548 int java_lang_Thread::_scopedValueBindings_offset; 1549 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;) 1550 1551 #define THREAD_FIELDS_DO(macro) \ 1552 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \ 1553 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1554 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \ 1555 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \ 1556 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1557 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \ 1558 macro(_tid_offset, k, "tid", long_signature, false); \ 1559 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \ 1560 macro(_continuation_offset, k, "cont", continuation_signature, false); \ 1561 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false); 1562 1563 void java_lang_Thread::compute_offsets() { 1564 assert(_holder_offset == 0, "offsets should be initialized only once"); 1565 1566 InstanceKlass* k = vmClasses::Thread_klass(); 1567 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1568 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1569 } 1570 1571 #if INCLUDE_CDS 1572 void java_lang_Thread::serialize_offsets(SerializeClosure* f) { 1573 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1574 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1575 } 1576 #endif 1577 1578 JavaThread* java_lang_Thread::thread(oop java_thread) { 1579 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset)); 1580 } 1581 1582 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) { 1583 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset)); 1584 } 1585 1586 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1587 java_thread->address_field_put(_eetop_offset, (address)thread); 1588 } 1589 1590 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) { 1591 java_thread->release_address_field_put(_eetop_offset, (address)thread); 1592 } 1593 1594 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) { 1595 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset); 1596 } 1597 1598 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) { 1599 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state); 1600 } 1601 1602 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) { 1603 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset); 1604 } 1605 1606 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) { 1607 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked"); 1608 int val = VTMS_transition_disable_count(java_thread); 1609 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1); 1610 } 1611 1612 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) { 1613 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked"); 1614 int val = VTMS_transition_disable_count(java_thread); 1615 assert(val > 0, "VTMS_transition_disable_count should never be negative"); 1616 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1); 1617 } 1618 1619 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) { 1620 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset); 1621 } 1622 1623 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) { 1624 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val); 1625 } 1626 1627 int java_lang_Thread::is_in_VTMS_transition_offset() { 1628 return _jvmti_is_in_VTMS_transition_offset; 1629 } 1630 1631 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) { 1632 assert(java_thread != nullptr, "need a java_lang_Thread pointer here"); 1633 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr); 1634 } 1635 1636 oop java_lang_Thread::holder(oop java_thread) { 1637 // Note: may return null if the thread is still attaching 1638 return java_thread->obj_field(_holder_offset); 1639 } 1640 1641 bool java_lang_Thread::interrupted(oop java_thread) { 1642 // Make sure the caller can safely access oops. 1643 assert(Thread::current()->is_VM_thread() || 1644 (JavaThread::current()->thread_state() != _thread_blocked && 1645 JavaThread::current()->thread_state() != _thread_in_native), 1646 "Unsafe access to oop"); 1647 return java_thread->bool_field_volatile(_interrupted_offset); 1648 } 1649 1650 void java_lang_Thread::set_interrupted(oop java_thread, bool val) { 1651 // Make sure the caller can safely access oops. 1652 assert(Thread::current()->is_VM_thread() || 1653 (JavaThread::current()->thread_state() != _thread_blocked && 1654 JavaThread::current()->thread_state() != _thread_in_native), 1655 "Unsafe access to oop"); 1656 java_thread->bool_field_put_volatile(_interrupted_offset, val); 1657 } 1658 1659 1660 oop java_lang_Thread::name(oop java_thread) { 1661 return java_thread->obj_field(_name_offset); 1662 } 1663 1664 1665 void java_lang_Thread::set_name(oop java_thread, oop name) { 1666 java_thread->obj_field_put(_name_offset, name); 1667 } 1668 1669 // Convenience macros for setting and getting Thread fields that 1670 // are actually stored in the FieldHolder object of the thread. 1671 // The FieldHolder can be null whilst a thread is attaching via 1672 // JNI, and when the main thread is attaching. 1673 1674 // The default value should be the default/zero initialized value 1675 // of the field as it would be in java.lang.Thread.FieldHolder. 1676 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \ 1677 { \ 1678 oop holder = java_lang_Thread::holder(java_thread); \ 1679 if (holder != nullptr) \ 1680 return java_lang_Thread_FieldHolder::field(holder); \ 1681 else \ 1682 return default_val; \ 1683 } 1684 1685 // We should never be trying to set a field of an attaching thread. 1686 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \ 1687 { \ 1688 oop holder = java_lang_Thread::holder(java_thread); \ 1689 assert(holder != nullptr, "Thread not fully initialized"); \ 1690 java_lang_Thread_FieldHolder::set_##field(holder, value); \ 1691 } 1692 1693 1694 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1695 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0); 1696 } 1697 1698 1699 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1700 SET_FIELDHOLDER_FIELD(java_thread, priority, priority) 1701 } 1702 1703 1704 oop java_lang_Thread::threadGroup(oop java_thread) { 1705 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr); 1706 } 1707 1708 1709 bool java_lang_Thread::is_alive(oop java_thread) { 1710 JavaThread* thr = java_lang_Thread::thread(java_thread); 1711 return (thr != nullptr); 1712 } 1713 1714 1715 bool java_lang_Thread::is_daemon(oop java_thread) { 1716 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false); 1717 } 1718 1719 1720 void java_lang_Thread::set_daemon(oop java_thread) { 1721 SET_FIELDHOLDER_FIELD(java_thread, daemon, true); 1722 } 1723 1724 oop java_lang_Thread::context_class_loader(oop java_thread) { 1725 return java_thread->obj_field(_contextClassLoader_offset); 1726 } 1727 1728 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1729 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1730 } 1731 1732 1733 jlong java_lang_Thread::stackSize(oop java_thread) { 1734 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0); 1735 } 1736 1737 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1738 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) { 1739 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status); 1740 } 1741 1742 // Read thread status value from threadStatus field in java.lang.Thread java class. 1743 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1744 // Make sure the caller is operating on behalf of the VM or is 1745 // running VM code (state == _thread_in_vm). 1746 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1747 JavaThread::current()->thread_state() == _thread_in_vm, 1748 "Java Thread is not running in vm"); 1749 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */); 1750 } 1751 1752 ByteSize java_lang_Thread::thread_id_offset() { 1753 return in_ByteSize(_tid_offset); 1754 } 1755 1756 oop java_lang_Thread::park_blocker(oop java_thread) { 1757 return java_thread->obj_field(_park_blocker_offset); 1758 } 1759 1760 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) { 1761 ThreadsListHandle tlh(JavaThread::current()); 1762 JavaThread* thread; 1763 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread); 1764 if (is_virtual) { 1765 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread); 1766 if (carrier_thread == nullptr) { 1767 return nullptr; 1768 } 1769 thread = java_lang_Thread::thread(carrier_thread); 1770 } else { 1771 thread = java_lang_Thread::thread(java_thread); 1772 } 1773 if (thread == nullptr) { 1774 return nullptr; 1775 } 1776 1777 class GetStackTraceClosure : public HandshakeClosure { 1778 public: 1779 const Handle _java_thread; 1780 int _depth; 1781 bool _retry_handshake; 1782 GrowableArray<Method*>* _methods; 1783 GrowableArray<int>* _bcis; 1784 1785 GetStackTraceClosure(Handle java_thread) : 1786 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false), 1787 _methods(nullptr), _bcis(nullptr) { 1788 } 1789 ~GetStackTraceClosure() { 1790 delete _methods; 1791 delete _bcis; 1792 } 1793 1794 bool read_reset_retry() { 1795 bool ret = _retry_handshake; 1796 // If we re-execute the handshake this method need to return false 1797 // when the handshake cannot be performed. (E.g. thread terminating) 1798 _retry_handshake = false; 1799 return ret; 1800 } 1801 1802 void do_thread(Thread* th) { 1803 if (!Thread::current()->is_Java_thread()) { 1804 _retry_handshake = true; 1805 return; 1806 } 1807 1808 JavaThread* thread = JavaThread::cast(th); 1809 1810 if (!thread->has_last_Java_frame()) { 1811 return; 1812 } 1813 1814 bool carrier = false; 1815 if (java_lang_VirtualThread::is_instance(_java_thread())) { 1816 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread 1817 const ContinuationEntry* ce = thread->vthread_continuation(); 1818 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) { 1819 return; // not mounted 1820 } 1821 } else { 1822 carrier = (thread->vthread_continuation() != nullptr); 1823 } 1824 1825 const int max_depth = MaxJavaStackTraceDepth; 1826 const bool skip_hidden = !ShowHiddenFrames; 1827 1828 // Pick minimum length that will cover most cases 1829 int init_length = 64; 1830 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal); 1831 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal); 1832 1833 int total_count = 0; 1834 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops 1835 !vfst.at_end() && (max_depth == 0 || max_depth != total_count); 1836 vfst.next()) { 1837 1838 if (skip_hidden && (vfst.method()->is_hidden() || 1839 vfst.method()->is_continuation_enter_intrinsic())) { 1840 continue; 1841 } 1842 1843 _methods->push(vfst.method()); 1844 _bcis->push(vfst.bci()); 1845 total_count++; 1846 } 1847 1848 _depth = total_count; 1849 } 1850 }; 1851 1852 // Handshake with target 1853 ResourceMark rm(THREAD); 1854 HandleMark hm(THREAD); 1855 GetStackTraceClosure gstc(Handle(THREAD, java_thread)); 1856 do { 1857 Handshake::execute(&gstc, &tlh, thread); 1858 } while (gstc.read_reset_retry()); 1859 1860 // Stop if no stack trace is found. 1861 if (gstc._depth == 0) { 1862 return nullptr; 1863 } 1864 1865 // Convert to StackTraceElement array 1866 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 1867 assert(k != nullptr, "must be loaded in 1.4+"); 1868 if (k->should_be_initialized()) { 1869 k->initialize(CHECK_NULL); 1870 } 1871 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL); 1872 1873 for (int i = 0; i < gstc._depth; i++) { 1874 methodHandle method(THREAD, gstc._methods->at(i)); 1875 oop element = java_lang_StackTraceElement::create(method, 1876 gstc._bcis->at(i), 1877 CHECK_NULL); 1878 trace->obj_at_put(i, element); 1879 } 1880 1881 return trace(); 1882 } 1883 1884 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1885 JavaThreadStatus status = get_thread_status(java_thread); 1886 switch (status) { 1887 case JavaThreadStatus::NEW : return "NEW"; 1888 case JavaThreadStatus::RUNNABLE : return "RUNNABLE"; 1889 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)"; 1890 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1891 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1892 case JavaThreadStatus::PARKED : return "WAITING (parking)"; 1893 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)"; 1894 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1895 case JavaThreadStatus::TERMINATED : return "TERMINATED"; 1896 default : return "UNKNOWN"; 1897 }; 1898 } 1899 int java_lang_ThreadGroup::_parent_offset; 1900 int java_lang_ThreadGroup::_name_offset; 1901 int java_lang_ThreadGroup::_maxPriority_offset; 1902 int java_lang_ThreadGroup::_daemon_offset; 1903 1904 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1905 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1906 return java_thread_group->obj_field(_parent_offset); 1907 } 1908 1909 // ("name as oop" accessor is not necessary) 1910 1911 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1912 oop name = java_thread_group->obj_field(_name_offset); 1913 // ThreadGroup.name can be null 1914 if (name != nullptr) { 1915 return java_lang_String::as_utf8_string(name); 1916 } 1917 return nullptr; 1918 } 1919 1920 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1921 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1922 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1923 } 1924 1925 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1926 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1927 return java_thread_group->bool_field(_daemon_offset) != 0; 1928 } 1929 1930 #define THREADGROUP_FIELDS_DO(macro) \ 1931 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \ 1932 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1933 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \ 1934 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); 1935 1936 void java_lang_ThreadGroup::compute_offsets() { 1937 assert(_parent_offset == 0, "offsets should be initialized only once"); 1938 1939 InstanceKlass* k = vmClasses::ThreadGroup_klass(); 1940 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1941 } 1942 1943 #if INCLUDE_CDS 1944 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) { 1945 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1946 } 1947 #endif 1948 1949 1950 // java_lang_VirtualThread 1951 1952 int java_lang_VirtualThread::static_vthread_scope_offset; 1953 int java_lang_VirtualThread::_carrierThread_offset; 1954 int java_lang_VirtualThread::_continuation_offset; 1955 int java_lang_VirtualThread::_state_offset; 1956 1957 #define VTHREAD_FIELDS_DO(macro) \ 1958 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \ 1959 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \ 1960 macro(_continuation_offset, k, "cont", continuation_signature, false); \ 1961 macro(_state_offset, k, "state", int_signature, false) 1962 1963 1964 void java_lang_VirtualThread::compute_offsets() { 1965 InstanceKlass* k = vmClasses::VirtualThread_klass(); 1966 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1967 } 1968 1969 bool java_lang_VirtualThread::is_instance(oop obj) { 1970 return obj != nullptr && is_subclass(obj->klass()); 1971 } 1972 1973 oop java_lang_VirtualThread::carrier_thread(oop vthread) { 1974 oop thread = vthread->obj_field(_carrierThread_offset); 1975 return thread; 1976 } 1977 1978 oop java_lang_VirtualThread::continuation(oop vthread) { 1979 oop cont = vthread->obj_field(_continuation_offset); 1980 return cont; 1981 } 1982 1983 int java_lang_VirtualThread::state(oop vthread) { 1984 return vthread->int_field_acquire(_state_offset); 1985 } 1986 1987 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) { 1988 JavaThreadStatus status = JavaThreadStatus::NEW; 1989 switch (state) { 1990 case NEW : 1991 status = JavaThreadStatus::NEW; 1992 break; 1993 case STARTED : 1994 case RUNNABLE : 1995 case RUNNABLE_SUSPENDED : 1996 case RUNNING : 1997 case PARKING : 1998 case YIELDING : 1999 status = JavaThreadStatus::RUNNABLE; 2000 break; 2001 case PARKED : 2002 case PARKED_SUSPENDED : 2003 case PINNED : 2004 status = JavaThreadStatus::PARKED; 2005 break; 2006 case TERMINATED : 2007 status = JavaThreadStatus::TERMINATED; 2008 break; 2009 default: 2010 ShouldNotReachHere(); 2011 } 2012 return status; 2013 } 2014 2015 #if INCLUDE_CDS 2016 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) { 2017 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2018 } 2019 #endif 2020 2021 // java_lang_Throwable 2022 2023 int java_lang_Throwable::_backtrace_offset; 2024 int java_lang_Throwable::_detailMessage_offset; 2025 int java_lang_Throwable::_stackTrace_offset; 2026 int java_lang_Throwable::_depth_offset; 2027 int java_lang_Throwable::_cause_offset; 2028 int java_lang_Throwable::_static_unassigned_stacktrace_offset; 2029 2030 #define THROWABLE_FIELDS_DO(macro) \ 2031 macro(_backtrace_offset, k, "backtrace", object_signature, false); \ 2032 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \ 2033 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 2034 macro(_depth_offset, k, "depth", int_signature, false); \ 2035 macro(_cause_offset, k, "cause", throwable_signature, false); \ 2036 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 2037 2038 void java_lang_Throwable::compute_offsets() { 2039 InstanceKlass* k = vmClasses::Throwable_klass(); 2040 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2041 } 2042 2043 #if INCLUDE_CDS 2044 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) { 2045 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2046 } 2047 #endif 2048 2049 oop java_lang_Throwable::unassigned_stacktrace() { 2050 InstanceKlass* ik = vmClasses::Throwable_klass(); 2051 oop base = ik->static_field_base_raw(); 2052 return base->obj_field(_static_unassigned_stacktrace_offset); 2053 } 2054 2055 oop java_lang_Throwable::backtrace(oop throwable) { 2056 return throwable->obj_field_acquire(_backtrace_offset); 2057 } 2058 2059 2060 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 2061 throwable->release_obj_field_put(_backtrace_offset, value); 2062 } 2063 2064 int java_lang_Throwable::depth(oop throwable) { 2065 return throwable->int_field(_depth_offset); 2066 } 2067 2068 void java_lang_Throwable::set_depth(oop throwable, int value) { 2069 throwable->int_field_put(_depth_offset, value); 2070 } 2071 2072 oop java_lang_Throwable::message(oop throwable) { 2073 return throwable->obj_field(_detailMessage_offset); 2074 } 2075 2076 oop java_lang_Throwable::cause(oop throwable) { 2077 return throwable->obj_field(_cause_offset); 2078 } 2079 2080 // Return Symbol for detailed_message or null 2081 Symbol* java_lang_Throwable::detail_message(oop throwable) { 2082 PreserveExceptionMark pm(Thread::current()); 2083 oop detailed_message = java_lang_Throwable::message(throwable); 2084 if (detailed_message != nullptr) { 2085 return java_lang_String::as_symbol(detailed_message); 2086 } 2087 return nullptr; 2088 } 2089 2090 void java_lang_Throwable::set_message(oop throwable, oop value) { 2091 throwable->obj_field_put(_detailMessage_offset, value); 2092 } 2093 2094 2095 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 2096 throwable->obj_field_put(_stackTrace_offset, st_element_array); 2097 } 2098 2099 void java_lang_Throwable::clear_stacktrace(oop throwable) { 2100 set_stacktrace(throwable, nullptr); 2101 } 2102 2103 2104 void java_lang_Throwable::print(oop throwable, outputStream* st) { 2105 ResourceMark rm; 2106 Klass* k = throwable->klass(); 2107 assert(k != nullptr, "just checking"); 2108 st->print("%s", k->external_name()); 2109 oop msg = message(throwable); 2110 if (msg != nullptr) { 2111 st->print(": %s", java_lang_String::as_utf8_string(msg)); 2112 } 2113 } 2114 2115 // After this many redefines, the stack trace is unreliable. 2116 const int MAX_VERSION = USHRT_MAX; 2117 2118 static inline bool version_matches(Method* method, int version) { 2119 assert(version < MAX_VERSION, "version is too big"); 2120 return method != nullptr && (method->constants()->version() == version); 2121 } 2122 2123 // This class provides a simple wrapper over the internal structure of 2124 // exception backtrace to insulate users of the backtrace from needing 2125 // to know what it looks like. 2126 // The code of this class is not GC safe. Allocations can only happen 2127 // in expand(). 2128 class BacktraceBuilder: public StackObj { 2129 friend class BacktraceIterator; 2130 private: 2131 Handle _backtrace; 2132 objArrayOop _head; 2133 typeArrayOop _methods; 2134 typeArrayOop _bcis; 2135 objArrayOop _mirrors; 2136 typeArrayOop _names; // Needed to insulate method name against redefinition. 2137 // True if the top frame of the backtrace is omitted because it shall be hidden. 2138 bool _has_hidden_top_frame; 2139 int _index; 2140 NoSafepointVerifier _nsv; 2141 2142 enum { 2143 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 2144 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 2145 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 2146 trace_names_offset = java_lang_Throwable::trace_names_offset, 2147 trace_conts_offset = java_lang_Throwable::trace_conts_offset, 2148 trace_next_offset = java_lang_Throwable::trace_next_offset, 2149 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset, 2150 trace_size = java_lang_Throwable::trace_size, 2151 trace_chunk_size = java_lang_Throwable::trace_chunk_size 2152 }; 2153 2154 // get info out of chunks 2155 static typeArrayOop get_methods(objArrayHandle chunk) { 2156 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 2157 assert(methods != nullptr, "method array should be initialized in backtrace"); 2158 return methods; 2159 } 2160 static typeArrayOop get_bcis(objArrayHandle chunk) { 2161 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 2162 assert(bcis != nullptr, "bci array should be initialized in backtrace"); 2163 return bcis; 2164 } 2165 static objArrayOop get_mirrors(objArrayHandle chunk) { 2166 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 2167 assert(mirrors != nullptr, "mirror array should be initialized in backtrace"); 2168 return mirrors; 2169 } 2170 static typeArrayOop get_names(objArrayHandle chunk) { 2171 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 2172 assert(names != nullptr, "names array should be initialized in backtrace"); 2173 return names; 2174 } 2175 static bool has_hidden_top_frame(objArrayHandle chunk) { 2176 oop hidden = chunk->obj_at(trace_hidden_offset); 2177 return hidden != nullptr; 2178 } 2179 2180 public: 2181 2182 // constructor for new backtrace 2183 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) { 2184 expand(CHECK); 2185 _backtrace = Handle(THREAD, _head); 2186 _index = 0; 2187 } 2188 2189 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 2190 _methods = get_methods(backtrace); 2191 _bcis = get_bcis(backtrace); 2192 _mirrors = get_mirrors(backtrace); 2193 _names = get_names(backtrace); 2194 _has_hidden_top_frame = has_hidden_top_frame(backtrace); 2195 assert(_methods->length() == _bcis->length() && 2196 _methods->length() == _mirrors->length() && 2197 _mirrors->length() == _names->length(), 2198 "method and source information arrays should match"); 2199 2200 // head is the preallocated backtrace 2201 _head = backtrace(); 2202 _backtrace = Handle(thread, _head); 2203 _index = 0; 2204 } 2205 2206 void expand(TRAPS) { 2207 objArrayHandle old_head(THREAD, _head); 2208 PauseNoSafepointVerifier pnsv(&_nsv); 2209 2210 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2211 objArrayHandle new_head(THREAD, head); 2212 2213 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2214 typeArrayHandle new_methods(THREAD, methods); 2215 2216 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2217 typeArrayHandle new_bcis(THREAD, bcis); 2218 2219 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2220 objArrayHandle new_mirrors(THREAD, mirrors); 2221 2222 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2223 typeArrayHandle new_names(THREAD, names); 2224 2225 if (!old_head.is_null()) { 2226 old_head->obj_at_put(trace_next_offset, new_head()); 2227 } 2228 new_head->obj_at_put(trace_methods_offset, new_methods()); 2229 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2230 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2231 new_head->obj_at_put(trace_names_offset, new_names()); 2232 new_head->obj_at_put(trace_hidden_offset, nullptr); 2233 2234 _head = new_head(); 2235 _methods = new_methods(); 2236 _bcis = new_bcis(); 2237 _mirrors = new_mirrors(); 2238 _names = new_names(); 2239 _index = 0; 2240 } 2241 2242 oop backtrace() { 2243 return _backtrace(); 2244 } 2245 2246 inline void push(Method* method, int bci, TRAPS) { 2247 // Smear the -1 bci to 0 since the array only holds unsigned 2248 // shorts. The later line number lookup would just smear the -1 2249 // to a 0 even if it could be recorded. 2250 if (bci == SynchronizationEntryBCI) bci = 0; 2251 2252 if (_index >= trace_chunk_size) { 2253 methodHandle mhandle(THREAD, method); 2254 expand(CHECK); 2255 method = mhandle(); 2256 } 2257 2258 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2259 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2260 2261 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2262 // klass owning the symbols alive so their refcounts aren't decremented. 2263 Symbol* name = method->name(); 2264 _names->symbol_at_put(_index, name); 2265 2266 // We need to save the mirrors in the backtrace to keep the class 2267 // from being unloaded while we still have this stack trace. 2268 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror"); 2269 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2270 2271 _index++; 2272 } 2273 2274 void set_has_hidden_top_frame() { 2275 if (!_has_hidden_top_frame) { 2276 // It would be nice to add java/lang/Boolean::TRUE here 2277 // to indicate that this backtrace has a hidden top frame. 2278 // But this code is used before TRUE is allocated. 2279 // Therefore let's just use an arbitrary legal oop 2280 // available right here. _methods is a short[]. 2281 assert(_methods != nullptr, "we need a legal oop"); 2282 _has_hidden_top_frame = true; 2283 _head->obj_at_put(trace_hidden_offset, _methods); 2284 } 2285 } 2286 }; 2287 2288 struct BacktraceElement : public StackObj { 2289 int _method_id; 2290 int _bci; 2291 int _version; 2292 Symbol* _name; 2293 Handle _mirror; 2294 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2295 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {} 2296 }; 2297 2298 class BacktraceIterator : public StackObj { 2299 int _index; 2300 objArrayHandle _result; 2301 objArrayHandle _mirrors; 2302 typeArrayHandle _methods; 2303 typeArrayHandle _bcis; 2304 typeArrayHandle _names; 2305 2306 void init(objArrayHandle result, Thread* thread) { 2307 // Get method id, bci, version and mirror from chunk 2308 _result = result; 2309 if (_result.not_null()) { 2310 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2311 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2312 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2313 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2314 _index = 0; 2315 } 2316 } 2317 public: 2318 BacktraceIterator(objArrayHandle result, Thread* thread) { 2319 init(result, thread); 2320 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2321 } 2322 2323 BacktraceElement next(Thread* thread) { 2324 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2325 _methods->ushort_at(_index), 2326 Backtrace::version_at(_bcis->int_at(_index)), 2327 Backtrace::bci_at(_bcis->int_at(_index)), 2328 _names->symbol_at(_index)); 2329 _index++; 2330 2331 if (_index >= java_lang_Throwable::trace_chunk_size) { 2332 int next_offset = java_lang_Throwable::trace_next_offset; 2333 // Get next chunk 2334 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2335 init(result, thread); 2336 } 2337 return e; 2338 } 2339 2340 bool repeat() { 2341 return _result.not_null() && _mirrors->obj_at(_index) != nullptr; 2342 } 2343 }; 2344 2345 2346 // Print stack trace element to resource allocated buffer 2347 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 2348 int version, int bci, Symbol* name) { 2349 ResourceMark rm; 2350 2351 // Get strings and string lengths 2352 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2353 const char* klass_name = holder->external_name(); 2354 int buf_len = (int)strlen(klass_name); 2355 2356 char* method_name = name->as_C_string(); 2357 buf_len += (int)strlen(method_name); 2358 2359 char* source_file_name = nullptr; 2360 Symbol* source = Backtrace::get_source_file_name(holder, version); 2361 if (source != nullptr) { 2362 source_file_name = source->as_C_string(); 2363 buf_len += (int)strlen(source_file_name); 2364 } 2365 2366 char *module_name = nullptr, *module_version = nullptr; 2367 ModuleEntry* module = holder->module(); 2368 if (module->is_named()) { 2369 module_name = module->name()->as_C_string(); 2370 buf_len += (int)strlen(module_name); 2371 if (module->version() != nullptr) { 2372 module_version = module->version()->as_C_string(); 2373 buf_len += (int)strlen(module_version); 2374 } 2375 } 2376 2377 // Allocate temporary buffer with extra space for formatting and line number 2378 const size_t buf_size = buf_len + 64; 2379 char* buf = NEW_RESOURCE_ARRAY(char, buf_size); 2380 2381 // Print stack trace line in buffer 2382 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name); 2383 2384 // Print module information 2385 if (module_name != nullptr) { 2386 if (module_version != nullptr) { 2387 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version); 2388 } else { 2389 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name); 2390 } 2391 } 2392 2393 // The method can be null if the requested class version is gone 2394 Method* method = holder->method_with_orig_idnum(method_id, version); 2395 if (!version_matches(method, version)) { 2396 strcat(buf, "Redefined)"); 2397 } else { 2398 int line_number = Backtrace::get_line_number(method, bci); 2399 if (line_number == -2) { 2400 strcat(buf, "Native Method)"); 2401 } else { 2402 if (source_file_name != nullptr && (line_number != -1)) { 2403 // Sourcename and linenumber 2404 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number); 2405 } else if (source_file_name != nullptr) { 2406 // Just sourcename 2407 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name); 2408 } else { 2409 // Neither sourcename nor linenumber 2410 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)"); 2411 } 2412 CompiledMethod* nm = method->code(); 2413 if (WizardMode && nm != nullptr) { 2414 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 2415 } 2416 } 2417 } 2418 2419 st->print_cr("%s", buf); 2420 } 2421 2422 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) { 2423 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 2424 int method_id = method->orig_method_idnum(); 2425 int version = method->constants()->version(); 2426 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 2427 } 2428 2429 /** 2430 * Print the throwable message and its stack trace plus all causes by walking the 2431 * cause chain. The output looks the same as of Throwable.printStackTrace(). 2432 */ 2433 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 2434 // First, print the message. 2435 print(throwable(), st); 2436 st->cr(); 2437 2438 // Now print the stack trace. 2439 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2440 while (throwable.not_null()) { 2441 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 2442 if (result.is_null()) { 2443 st->print_raw_cr("\t<<no stack trace available>>"); 2444 return; 2445 } 2446 BacktraceIterator iter(result, THREAD); 2447 2448 while (iter.repeat()) { 2449 BacktraceElement bte = iter.next(THREAD); 2450 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 2451 } 2452 { 2453 // Call getCause() which doesn't necessarily return the _cause field. 2454 ExceptionMark em(THREAD); 2455 JavaValue cause(T_OBJECT); 2456 JavaCalls::call_virtual(&cause, 2457 throwable, 2458 throwable->klass(), 2459 vmSymbols::getCause_name(), 2460 vmSymbols::void_throwable_signature(), 2461 THREAD); 2462 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 2463 if (HAS_PENDING_EXCEPTION) { 2464 CLEAR_PENDING_EXCEPTION; 2465 throwable = Handle(); 2466 } else { 2467 throwable = Handle(THREAD, cause.get_oop()); 2468 if (throwable.not_null()) { 2469 st->print("Caused by: "); 2470 print(throwable(), st); 2471 st->cr(); 2472 } 2473 } 2474 } 2475 } 2476 } 2477 2478 /** 2479 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 2480 */ 2481 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 2482 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected"); 2483 JavaValue result(T_VOID); 2484 JavaCalls::call_virtual(&result, 2485 throwable, 2486 vmClasses::Throwable_klass(), 2487 vmSymbols::printStackTrace_name(), 2488 vmSymbols::void_method_signature(), 2489 THREAD); 2490 } 2491 2492 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 2493 if (!StackTraceInThrowable) return; 2494 ResourceMark rm(THREAD); 2495 2496 // Start out by clearing the backtrace for this object, in case the VM 2497 // runs out of memory while allocating the stack trace 2498 set_backtrace(throwable(), nullptr); 2499 // Clear lazily constructed Java level stacktrace if refilling occurs 2500 // This is unnecessary in 1.7+ but harmless 2501 clear_stacktrace(throwable()); 2502 2503 int max_depth = MaxJavaStackTraceDepth; 2504 JavaThread* thread = THREAD; 2505 2506 BacktraceBuilder bt(CHECK); 2507 2508 // If there is no Java frame just return the method that was being called 2509 // with bci 0 2510 if (!thread->has_last_Java_frame()) { 2511 if (max_depth >= 1 && method() != nullptr) { 2512 bt.push(method(), 0, CHECK); 2513 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 2514 set_depth(throwable(), 1); 2515 set_backtrace(throwable(), bt.backtrace()); 2516 } 2517 return; 2518 } 2519 2520 // Instead of using vframe directly, this version of fill_in_stack_trace 2521 // basically handles everything by hand. This significantly improved the 2522 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 2523 // See bug 6333838 for more details. 2524 // The "ASSERT" here is to verify this method generates the exactly same stack 2525 // trace as utilizing vframe. 2526 #ifdef ASSERT 2527 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */); 2528 #endif 2529 int total_count = 0; 2530 RegisterMap map(thread, 2531 RegisterMap::UpdateMap::skip, 2532 RegisterMap::ProcessFrames::skip, 2533 RegisterMap::WalkContinuation::include); 2534 int decode_offset = 0; 2535 CompiledMethod* nm = nullptr; 2536 bool skip_fillInStackTrace_check = false; 2537 bool skip_throwableInit_check = false; 2538 bool skip_hidden = !ShowHiddenFrames; 2539 bool show_carrier = ShowCarrierFrames; 2540 ContinuationEntry* cont_entry = thread->last_continuation(); 2541 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 2542 Method* method = nullptr; 2543 int bci = 0; 2544 2545 // Compiled java method case. 2546 if (decode_offset != 0) { 2547 DebugInfoReadStream stream(nm, decode_offset); 2548 decode_offset = stream.read_int(); 2549 method = (Method*)nm->metadata_at(stream.read_int()); 2550 bci = stream.read_bci(); 2551 } else { 2552 if (fr.is_first_frame()) break; 2553 2554 if (Continuation::is_continuation_enterSpecial(fr)) { 2555 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), ""); 2556 if (!show_carrier && cont_entry->is_virtual_thread()) { 2557 break; 2558 } 2559 cont_entry = cont_entry->parent(); 2560 } 2561 2562 address pc = fr.pc(); 2563 if (fr.is_interpreted_frame()) { 2564 address bcp; 2565 if (!map.in_cont()) { 2566 bcp = fr.interpreter_frame_bcp(); 2567 method = fr.interpreter_frame_method(); 2568 } else { 2569 bcp = map.stack_chunk()->interpreter_frame_bcp(fr); 2570 method = map.stack_chunk()->interpreter_frame_method(fr); 2571 } 2572 bci = method->bci_from(bcp); 2573 fr = fr.sender(&map); 2574 } else { 2575 CodeBlob* cb = fr.cb(); 2576 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null 2577 // but non nmethod 2578 fr = fr.sender(&map); 2579 if (cb == nullptr || !cb->is_compiled()) { 2580 continue; 2581 } 2582 nm = cb->as_compiled_method(); 2583 assert(nm->method() != nullptr, "must be"); 2584 if (nm->method()->is_native()) { 2585 method = nm->method(); 2586 bci = 0; 2587 } else { 2588 PcDesc* pd = nm->pc_desc_at(pc); 2589 decode_offset = pd->scope_decode_offset(); 2590 // if decode_offset is not equal to 0, it will execute the 2591 // "compiled java method case" at the beginning of the loop. 2592 continue; 2593 } 2594 } 2595 } 2596 #ifdef ASSERT 2597 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace 2598 assert(st.method() == method && st.bci() == bci, "Wrong stack trace"); 2599 st.next(); 2600 } 2601 #endif 2602 2603 // the format of the stacktrace will be: 2604 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2605 // - 0 or more <init> methods for the exception class (skipped) 2606 // - rest of the stack 2607 2608 if (!skip_fillInStackTrace_check) { 2609 if (method->name() == vmSymbols::fillInStackTrace_name() && 2610 throwable->is_a(method->method_holder())) { 2611 continue; 2612 } 2613 else { 2614 skip_fillInStackTrace_check = true; // gone past them all 2615 } 2616 } 2617 if (!skip_throwableInit_check) { 2618 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2619 2620 // skip <init> methods of the exception class and superclasses 2621 // This is similar to classic VM. 2622 if (method->name() == vmSymbols::object_initializer_name() && 2623 throwable->is_a(method->method_holder())) { 2624 continue; 2625 } else { 2626 // there are none or we've seen them all - either way stop checking 2627 skip_throwableInit_check = true; 2628 } 2629 } 2630 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) { 2631 if (skip_hidden) { 2632 if (total_count == 0) { 2633 // The top frame will be hidden from the stack trace. 2634 bt.set_has_hidden_top_frame(); 2635 } 2636 continue; 2637 } 2638 } 2639 2640 bt.push(method, bci, CHECK); 2641 total_count++; 2642 } 2643 2644 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2645 2646 // Put completed stack trace into throwable object 2647 set_backtrace(throwable(), bt.backtrace()); 2648 set_depth(throwable(), total_count); 2649 } 2650 2651 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2652 // No-op if stack trace is disabled 2653 if (!StackTraceInThrowable) { 2654 return; 2655 } 2656 2657 // Disable stack traces for some preallocated out of memory errors 2658 if (!Universe::should_fill_in_stack_trace(throwable)) { 2659 return; 2660 } 2661 2662 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2663 PreserveExceptionMark pm(THREAD); 2664 2665 fill_in_stack_trace(throwable, method, THREAD); 2666 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the 2667 // original exception via the PreserveExceptionMark destructor. 2668 CLEAR_PENDING_EXCEPTION; 2669 } 2670 2671 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2672 // Allocate stack trace - backtrace is created but not filled in 2673 2674 // No-op if stack trace is disabled 2675 if (!StackTraceInThrowable) return; 2676 BacktraceBuilder bt(CHECK); // creates a backtrace 2677 set_backtrace(throwable(), bt.backtrace()); 2678 } 2679 2680 2681 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2682 // Fill in stack trace into preallocated backtrace (no GC) 2683 2684 // No-op if stack trace is disabled 2685 if (!StackTraceInThrowable) return; 2686 2687 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check"); 2688 2689 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2690 2691 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2692 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2693 2694 ResourceMark rm(THREAD); 2695 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */); 2696 2697 BacktraceBuilder bt(THREAD, backtrace); 2698 2699 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2700 // methods as preallocated errors aren't created by "java" code. 2701 2702 // fill in as much stack trace as possible 2703 int chunk_count = 0; 2704 for (;!st.at_end(); st.next()) { 2705 bt.push(st.method(), st.bci(), CHECK); 2706 chunk_count++; 2707 2708 // Bail-out for deep stacks 2709 if (chunk_count >= trace_chunk_size) break; 2710 } 2711 set_depth(throwable(), chunk_count); 2712 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2713 2714 // We support the Throwable immutability protocol defined for Java 7. 2715 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2716 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized"); 2717 } 2718 2719 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace, 2720 objArrayHandle stack_trace_array_h, TRAPS) { 2721 2722 if (backtrace.is_null() || stack_trace_array_h.is_null()) { 2723 THROW(vmSymbols::java_lang_NullPointerException()); 2724 } 2725 2726 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2727 2728 if (stack_trace_array_h->length() != depth) { 2729 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2730 } 2731 2732 objArrayHandle result(THREAD, objArrayOop(backtrace())); 2733 BacktraceIterator iter(result, THREAD); 2734 2735 int index = 0; 2736 while (iter.repeat()) { 2737 BacktraceElement bte = iter.next(THREAD); 2738 2739 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2740 2741 if (stack_trace_element.is_null()) { 2742 THROW(vmSymbols::java_lang_NullPointerException()); 2743 } 2744 2745 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2746 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2747 2748 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2749 method, 2750 bte._version, 2751 bte._bci, 2752 bte._name, 2753 CHECK); 2754 } 2755 } 2756 2757 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) { 2758 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization 2759 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive 2760 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and 2761 // symbolic stacktrace of 'throwable'. 2762 assert(throwable.not_null(), "shouldn't be"); 2763 2764 // Now create the message from the original exception and thread name. 2765 ResourceMark rm(current); 2766 const char *message = nullptr; 2767 oop detailed_message = java_lang_Throwable::message(throwable()); 2768 if (detailed_message != nullptr) { 2769 message = java_lang_String::as_utf8_string(detailed_message); 2770 } 2771 stringStream st; 2772 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(), 2773 message == nullptr ? "" : ":"); 2774 if (message == nullptr) { 2775 st.print("[in thread \"%s\"]", current->name()); 2776 } else { 2777 st.print("%s [in thread \"%s\"]", message, current->name()); 2778 } 2779 2780 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError(); 2781 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string()); 2782 // If new_exception returns a different exception while creating the exception, 2783 // abandon the attempt to save the initialization error and return null. 2784 if (init_error->klass()->name() != exception_name) { 2785 log_info(class, init)("Exception %s thrown while saving initialization exception", 2786 init_error->klass()->external_name()); 2787 return Handle(); 2788 } 2789 2790 // Call to java to fill in the stack trace and clear declaringClassObject to 2791 // not keep classes alive in the stack trace. 2792 // call this: public StackTraceElement[] getStackTrace() 2793 JavaValue result(T_ARRAY); 2794 JavaCalls::call_virtual(&result, throwable, 2795 vmClasses::Throwable_klass(), 2796 vmSymbols::getStackTrace_name(), 2797 vmSymbols::getStackTrace_signature(), 2798 current); 2799 if (!current->has_pending_exception()){ 2800 Handle stack_trace(current, result.get_oop()); 2801 assert(stack_trace->is_objArray(), "Should be an array"); 2802 java_lang_Throwable::set_stacktrace(init_error(), stack_trace()); 2803 // Clear backtrace because the stacktrace should be used instead. 2804 set_backtrace(init_error(), nullptr); 2805 } else { 2806 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s", 2807 init_error->klass()->external_name()); 2808 current->clear_pending_exception(); 2809 } 2810 2811 return init_error; 2812 } 2813 2814 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) { 2815 JavaThread* current = JavaThread::current(); 2816 objArrayHandle result(current, objArrayOop(backtrace(throwable))); 2817 BacktraceIterator iter(result, current); 2818 // No backtrace available. 2819 if (!iter.repeat()) return false; 2820 2821 // If the exception happened in a frame that has been hidden, i.e., 2822 // omitted from the back trace, we can not compute the message. 2823 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset); 2824 if (hidden != nullptr) { 2825 return false; 2826 } 2827 2828 // Get first backtrace element. 2829 BacktraceElement bte = iter.next(current); 2830 2831 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2832 assert(holder != nullptr, "first element should be non-null"); 2833 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version); 2834 2835 // Original version is no longer available. 2836 if (m == nullptr || !version_matches(m, bte._version)) { 2837 return false; 2838 } 2839 2840 *method = m; 2841 *bci = bte._bci; 2842 return true; 2843 } 2844 2845 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2846 // Allocate java.lang.StackTraceElement instance 2847 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 2848 assert(k != nullptr, "must be loaded in 1.4+"); 2849 if (k->should_be_initialized()) { 2850 k->initialize(CHECK_NULL); 2851 } 2852 2853 Handle element = k->allocate_instance_handle(CHECK_NULL); 2854 2855 int version = method->constants()->version(); 2856 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL); 2857 return element(); 2858 } 2859 2860 void java_lang_StackTraceElement::fill_in(Handle element, 2861 InstanceKlass* holder, const methodHandle& method, 2862 int version, int bci, Symbol* name, TRAPS) { 2863 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check"); 2864 2865 ResourceMark rm(THREAD); 2866 HandleMark hm(THREAD); 2867 2868 // Fill in class name 2869 Handle java_class(THREAD, holder->java_mirror()); 2870 oop classname = java_lang_Class::name(java_class, CHECK); 2871 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2872 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class()); 2873 2874 oop loader = holder->class_loader(); 2875 if (loader != nullptr) { 2876 oop loader_name = java_lang_ClassLoader::name(loader); 2877 if (loader_name != nullptr) 2878 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2879 } 2880 2881 // Fill in method name 2882 oop methodname = StringTable::intern(name, CHECK); 2883 java_lang_StackTraceElement::set_methodName(element(), methodname); 2884 2885 // Fill in module name and version 2886 ModuleEntry* module = holder->module(); 2887 if (module->is_named()) { 2888 oop module_name = StringTable::intern(module->name(), CHECK); 2889 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2890 oop module_version; 2891 if (module->version() != nullptr) { 2892 module_version = StringTable::intern(module->version(), CHECK); 2893 } else { 2894 module_version = nullptr; 2895 } 2896 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2897 } 2898 2899 if (method() == nullptr || !version_matches(method(), version)) { 2900 // The method was redefined, accurate line number information isn't available 2901 java_lang_StackTraceElement::set_fileName(element(), nullptr); 2902 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2903 } else { 2904 Symbol* source; 2905 oop source_file; 2906 int line_number; 2907 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK); 2908 2909 java_lang_StackTraceElement::set_fileName(element(), source_file); 2910 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2911 } 2912 } 2913 2914 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class, 2915 InstanceKlass* holder, 2916 int version, 2917 const methodHandle& method, 2918 int bci, 2919 Symbol*& source, 2920 oop& source_file, 2921 int& line_number, TRAPS) { 2922 // Fill in source file name and line number. 2923 source = Backtrace::get_source_file_name(holder, version); 2924 source_file = java_lang_Class::source_file(java_class()); 2925 if (source != nullptr) { 2926 // Class was not redefined. We can trust its cache if set, 2927 // else we have to initialize it. 2928 if (source_file == nullptr) { 2929 source_file = StringTable::intern(source, CHECK); 2930 java_lang_Class::set_source_file(java_class(), source_file); 2931 } 2932 } else { 2933 // Class was redefined. Dump the cache if it was set. 2934 if (source_file != nullptr) { 2935 source_file = nullptr; 2936 java_lang_Class::set_source_file(java_class(), source_file); 2937 } 2938 } 2939 line_number = Backtrace::get_line_number(method(), bci); 2940 } 2941 2942 #if INCLUDE_JVMCI 2943 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci, 2944 Symbol*& filename, int& line_number, TRAPS) { 2945 ResourceMark rm(THREAD); 2946 HandleMark hm(THREAD); 2947 2948 filename = nullptr; 2949 line_number = -1; 2950 2951 oop source_file; 2952 int version = method->constants()->version(); 2953 InstanceKlass* holder = method->method_holder(); 2954 Handle java_class(THREAD, holder->java_mirror()); 2955 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK); 2956 } 2957 #endif // INCLUDE_JVMCI 2958 2959 // java_lang_ClassFrameInfo 2960 2961 int java_lang_ClassFrameInfo::_classOrMemberName_offset; 2962 int java_lang_ClassFrameInfo::_flags_offset; 2963 2964 #define CLASSFRAMEINFO_FIELDS_DO(macro) \ 2965 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \ 2966 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false) 2967 2968 void java_lang_ClassFrameInfo::compute_offsets() { 2969 InstanceKlass* k = vmClasses::ClassFrameInfo_klass(); 2970 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2971 } 2972 2973 #if INCLUDE_CDS 2974 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) { 2975 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2976 } 2977 #endif 2978 2979 static int get_flags(const methodHandle& m) { 2980 int flags = (jushort)( m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS ); 2981 if (m->is_initializer()) { 2982 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR; 2983 } else { 2984 flags |= java_lang_invoke_MemberName::MN_IS_METHOD; 2985 } 2986 if (m->caller_sensitive()) { 2987 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE; 2988 } 2989 if (m->is_hidden()) { 2990 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER; 2991 } 2992 assert((flags & 0xFF000000) == 0, "unexpected flags"); 2993 return flags; 2994 } 2995 2996 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) { 2997 return obj->obj_field(_classOrMemberName_offset); 2998 } 2999 3000 int java_lang_ClassFrameInfo::flags(oop obj) { 3001 return obj->int_field(_flags_offset); 3002 } 3003 3004 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) { 3005 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror()); 3006 // flags is initialized when ClassFrameInfo object is constructed and retain the value 3007 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m); 3008 stackFrame->int_field_put(_flags_offset, flags); 3009 } 3010 3011 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) { 3012 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK); 3013 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name); 3014 // flags is initialized when ClassFrameInfo object is constructed and retain the value 3015 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m); 3016 stackFrame->int_field_put(_flags_offset, flags); 3017 } 3018 3019 3020 // java_lang_StackFrameInfo 3021 3022 int java_lang_StackFrameInfo::_type_offset; 3023 int java_lang_StackFrameInfo::_name_offset; 3024 int java_lang_StackFrameInfo::_bci_offset; 3025 int java_lang_StackFrameInfo::_version_offset; 3026 int java_lang_StackFrameInfo::_contScope_offset; 3027 3028 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 3029 macro(_type_offset, k, "type", object_signature, false); \ 3030 macro(_name_offset, k, "name", string_signature, false); \ 3031 macro(_bci_offset, k, "bci", int_signature, false); \ 3032 macro(_contScope_offset, k, "contScope", continuationscope_signature, false) 3033 3034 void java_lang_StackFrameInfo::compute_offsets() { 3035 InstanceKlass* k = vmClasses::StackFrameInfo_klass(); 3036 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3037 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3038 } 3039 3040 #if INCLUDE_CDS 3041 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) { 3042 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3043 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3044 } 3045 #endif 3046 3047 Method* java_lang_StackFrameInfo::get_method(oop obj) { 3048 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj); 3049 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m); 3050 return method; 3051 } 3052 3053 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) { 3054 // set Method* or mid/cpref 3055 HandleMark hm(THREAD); 3056 Handle cont_h(THREAD, cont); 3057 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK); 3058 3059 // set bci 3060 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 3061 // method may be redefined; store the version 3062 int version = method->constants()->version(); 3063 assert((jushort)version == version, "version should be short"); 3064 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 3065 3066 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr; 3067 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope); 3068 } 3069 3070 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 3071 ResourceMark rm(THREAD); 3072 HandleMark hm(THREAD); 3073 3074 Method* method = java_lang_StackFrameInfo::get_method(stackFrame()); 3075 InstanceKlass* holder = method->method_holder(); 3076 short version = stackFrame->short_field(_version_offset); 3077 int bci = stackFrame->int_field(_bci_offset); 3078 Symbol* name = method->name(); 3079 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK); 3080 } 3081 3082 oop java_lang_StackFrameInfo::type(oop obj) { 3083 return obj->obj_field(_type_offset); 3084 } 3085 3086 void java_lang_StackFrameInfo::set_type(oop obj, oop value) { 3087 obj->obj_field_put(_type_offset, value); 3088 } 3089 3090 oop java_lang_StackFrameInfo::name(oop obj) { 3091 return obj->obj_field(_name_offset); 3092 } 3093 3094 void java_lang_StackFrameInfo::set_name(oop obj, oop value) { 3095 obj->obj_field_put(_name_offset, value); 3096 } 3097 3098 void java_lang_StackFrameInfo::set_version(oop obj, short value) { 3099 obj->short_field_put(_version_offset, value); 3100 } 3101 3102 void java_lang_StackFrameInfo::set_bci(oop obj, int value) { 3103 assert(value >= 0 && value < max_jushort, "must be a valid bci value"); 3104 obj->int_field_put(_bci_offset, value); 3105 } 3106 3107 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) { 3108 obj->obj_field_put(_contScope_offset, value); 3109 } 3110 3111 int java_lang_LiveStackFrameInfo::_monitors_offset; 3112 int java_lang_LiveStackFrameInfo::_locals_offset; 3113 int java_lang_LiveStackFrameInfo::_operands_offset; 3114 int java_lang_LiveStackFrameInfo::_mode_offset; 3115 3116 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 3117 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 3118 macro(_locals_offset, k, "locals", object_array_signature, false); \ 3119 macro(_operands_offset, k, "operands", object_array_signature, false); \ 3120 macro(_mode_offset, k, "mode", int_signature, false) 3121 3122 void java_lang_LiveStackFrameInfo::compute_offsets() { 3123 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass(); 3124 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3125 } 3126 3127 #if INCLUDE_CDS 3128 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) { 3129 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3130 } 3131 #endif 3132 3133 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) { 3134 obj->obj_field_put(_monitors_offset, value); 3135 } 3136 3137 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) { 3138 obj->obj_field_put(_locals_offset, value); 3139 } 3140 3141 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) { 3142 obj->obj_field_put(_operands_offset, value); 3143 } 3144 3145 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) { 3146 obj->int_field_put(_mode_offset, value); 3147 } 3148 3149 3150 // java_lang_AccessibleObject 3151 3152 int java_lang_reflect_AccessibleObject::_override_offset; 3153 3154 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 3155 macro(_override_offset, k, "override", bool_signature, false) 3156 3157 void java_lang_reflect_AccessibleObject::compute_offsets() { 3158 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass(); 3159 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3160 } 3161 3162 #if INCLUDE_CDS 3163 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) { 3164 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3165 } 3166 #endif 3167 3168 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 3169 return (jboolean) reflect->bool_field(_override_offset); 3170 } 3171 3172 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 3173 reflect->bool_field_put(_override_offset, (int) value); 3174 } 3175 3176 // java_lang_reflect_Method 3177 3178 int java_lang_reflect_Method::_clazz_offset; 3179 int java_lang_reflect_Method::_name_offset; 3180 int java_lang_reflect_Method::_returnType_offset; 3181 int java_lang_reflect_Method::_parameterTypes_offset; 3182 int java_lang_reflect_Method::_exceptionTypes_offset; 3183 int java_lang_reflect_Method::_slot_offset; 3184 int java_lang_reflect_Method::_modifiers_offset; 3185 int java_lang_reflect_Method::_signature_offset; 3186 int java_lang_reflect_Method::_annotations_offset; 3187 int java_lang_reflect_Method::_parameter_annotations_offset; 3188 int java_lang_reflect_Method::_annotation_default_offset; 3189 3190 #define METHOD_FIELDS_DO(macro) \ 3191 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3192 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3193 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 3194 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 3195 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 3196 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3197 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3198 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3199 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 3200 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \ 3201 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false); 3202 3203 void java_lang_reflect_Method::compute_offsets() { 3204 InstanceKlass* k = vmClasses::reflect_Method_klass(); 3205 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3206 } 3207 3208 #if INCLUDE_CDS 3209 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) { 3210 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3211 } 3212 #endif 3213 3214 Handle java_lang_reflect_Method::create(TRAPS) { 3215 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3216 Klass* klass = vmClasses::reflect_Method_klass(); 3217 // This class is eagerly initialized during VM initialization, since we keep a reference 3218 // to one of the methods 3219 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 3220 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 3221 } 3222 3223 oop java_lang_reflect_Method::clazz(oop reflect) { 3224 return reflect->obj_field(_clazz_offset); 3225 } 3226 3227 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 3228 reflect->obj_field_put(_clazz_offset, value); 3229 } 3230 3231 int java_lang_reflect_Method::slot(oop reflect) { 3232 return reflect->int_field(_slot_offset); 3233 } 3234 3235 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 3236 reflect->int_field_put(_slot_offset, value); 3237 } 3238 3239 void java_lang_reflect_Method::set_name(oop method, oop value) { 3240 method->obj_field_put(_name_offset, value); 3241 } 3242 3243 oop java_lang_reflect_Method::return_type(oop method) { 3244 return method->obj_field(_returnType_offset); 3245 } 3246 3247 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 3248 method->obj_field_put(_returnType_offset, value); 3249 } 3250 3251 oop java_lang_reflect_Method::parameter_types(oop method) { 3252 return method->obj_field(_parameterTypes_offset); 3253 } 3254 3255 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 3256 method->obj_field_put(_parameterTypes_offset, value); 3257 } 3258 3259 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 3260 method->obj_field_put(_exceptionTypes_offset, value); 3261 } 3262 3263 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 3264 method->int_field_put(_modifiers_offset, value); 3265 } 3266 3267 void java_lang_reflect_Method::set_signature(oop method, oop value) { 3268 method->obj_field_put(_signature_offset, value); 3269 } 3270 3271 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 3272 method->obj_field_put(_annotations_offset, value); 3273 } 3274 3275 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 3276 method->obj_field_put(_parameter_annotations_offset, value); 3277 } 3278 3279 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 3280 method->obj_field_put(_annotation_default_offset, value); 3281 } 3282 3283 int java_lang_reflect_Constructor::_clazz_offset; 3284 int java_lang_reflect_Constructor::_parameterTypes_offset; 3285 int java_lang_reflect_Constructor::_exceptionTypes_offset; 3286 int java_lang_reflect_Constructor::_slot_offset; 3287 int java_lang_reflect_Constructor::_modifiers_offset; 3288 int java_lang_reflect_Constructor::_signature_offset; 3289 int java_lang_reflect_Constructor::_annotations_offset; 3290 int java_lang_reflect_Constructor::_parameter_annotations_offset; 3291 3292 #define CONSTRUCTOR_FIELDS_DO(macro) \ 3293 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3294 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 3295 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 3296 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3297 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3298 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3299 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 3300 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); 3301 3302 void java_lang_reflect_Constructor::compute_offsets() { 3303 InstanceKlass* k = vmClasses::reflect_Constructor_klass(); 3304 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3305 } 3306 3307 #if INCLUDE_CDS 3308 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) { 3309 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3310 } 3311 #endif 3312 3313 Handle java_lang_reflect_Constructor::create(TRAPS) { 3314 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3315 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 3316 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3317 InstanceKlass* ik = InstanceKlass::cast(k); 3318 // Ensure it is initialized 3319 ik->initialize(CHECK_NH); 3320 return ik->allocate_instance_handle(THREAD); 3321 } 3322 3323 oop java_lang_reflect_Constructor::clazz(oop reflect) { 3324 return reflect->obj_field(_clazz_offset); 3325 } 3326 3327 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 3328 reflect->obj_field_put(_clazz_offset, value); 3329 } 3330 3331 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 3332 return constructor->obj_field(_parameterTypes_offset); 3333 } 3334 3335 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 3336 constructor->obj_field_put(_parameterTypes_offset, value); 3337 } 3338 3339 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 3340 constructor->obj_field_put(_exceptionTypes_offset, value); 3341 } 3342 3343 int java_lang_reflect_Constructor::slot(oop reflect) { 3344 return reflect->int_field(_slot_offset); 3345 } 3346 3347 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 3348 reflect->int_field_put(_slot_offset, value); 3349 } 3350 3351 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 3352 constructor->int_field_put(_modifiers_offset, value); 3353 } 3354 3355 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 3356 constructor->obj_field_put(_signature_offset, value); 3357 } 3358 3359 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 3360 constructor->obj_field_put(_annotations_offset, value); 3361 } 3362 3363 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 3364 method->obj_field_put(_parameter_annotations_offset, value); 3365 } 3366 3367 int java_lang_reflect_Field::_clazz_offset; 3368 int java_lang_reflect_Field::_name_offset; 3369 int java_lang_reflect_Field::_type_offset; 3370 int java_lang_reflect_Field::_slot_offset; 3371 int java_lang_reflect_Field::_modifiers_offset; 3372 int java_lang_reflect_Field::_trusted_final_offset; 3373 int java_lang_reflect_Field::_signature_offset; 3374 int java_lang_reflect_Field::_annotations_offset; 3375 3376 #define FIELD_FIELDS_DO(macro) \ 3377 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3378 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3379 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \ 3380 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3381 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3382 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \ 3383 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3384 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); 3385 3386 void java_lang_reflect_Field::compute_offsets() { 3387 InstanceKlass* k = vmClasses::reflect_Field_klass(); 3388 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3389 } 3390 3391 #if INCLUDE_CDS 3392 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) { 3393 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3394 } 3395 #endif 3396 3397 Handle java_lang_reflect_Field::create(TRAPS) { 3398 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3399 Symbol* name = vmSymbols::java_lang_reflect_Field(); 3400 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3401 InstanceKlass* ik = InstanceKlass::cast(k); 3402 // Ensure it is initialized 3403 ik->initialize(CHECK_NH); 3404 return ik->allocate_instance_handle(THREAD); 3405 } 3406 3407 oop java_lang_reflect_Field::clazz(oop reflect) { 3408 return reflect->obj_field(_clazz_offset); 3409 } 3410 3411 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 3412 reflect->obj_field_put(_clazz_offset, value); 3413 } 3414 3415 oop java_lang_reflect_Field::name(oop field) { 3416 return field->obj_field(_name_offset); 3417 } 3418 3419 void java_lang_reflect_Field::set_name(oop field, oop value) { 3420 field->obj_field_put(_name_offset, value); 3421 } 3422 3423 oop java_lang_reflect_Field::type(oop field) { 3424 return field->obj_field(_type_offset); 3425 } 3426 3427 void java_lang_reflect_Field::set_type(oop field, oop value) { 3428 field->obj_field_put(_type_offset, value); 3429 } 3430 3431 int java_lang_reflect_Field::slot(oop reflect) { 3432 return reflect->int_field(_slot_offset); 3433 } 3434 3435 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 3436 reflect->int_field_put(_slot_offset, value); 3437 } 3438 3439 int java_lang_reflect_Field::modifiers(oop field) { 3440 return field->int_field(_modifiers_offset); 3441 } 3442 3443 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 3444 field->int_field_put(_modifiers_offset, value); 3445 } 3446 3447 void java_lang_reflect_Field::set_trusted_final(oop field) { 3448 field->bool_field_put(_trusted_final_offset, true); 3449 } 3450 3451 void java_lang_reflect_Field::set_signature(oop field, oop value) { 3452 field->obj_field_put(_signature_offset, value); 3453 } 3454 3455 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 3456 field->obj_field_put(_annotations_offset, value); 3457 } 3458 3459 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) { 3460 // Allocate java.lang.reflect.RecordComponent instance 3461 HandleMark hm(THREAD); 3462 InstanceKlass* ik = vmClasses::RecordComponent_klass(); 3463 assert(ik != nullptr, "must be loaded"); 3464 ik->initialize(CHECK_NULL); 3465 3466 Handle element = ik->allocate_instance_handle(CHECK_NULL); 3467 3468 Handle decl_class(THREAD, holder->java_mirror()); 3469 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class()); 3470 3471 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8 3472 oop component_name = StringTable::intern(name, CHECK_NULL); 3473 java_lang_reflect_RecordComponent::set_name(element(), component_name); 3474 3475 Symbol* type = holder->constants()->symbol_at(component->descriptor_index()); 3476 Handle component_type_h = 3477 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL); 3478 java_lang_reflect_RecordComponent::set_type(element(), component_type_h()); 3479 3480 Method* accessor_method = nullptr; 3481 { 3482 // Prepend "()" to type to create the full method signature. 3483 ResourceMark rm(THREAD); 3484 int sig_len = type->utf8_length() + 3; // "()" and null char 3485 char* sig = NEW_RESOURCE_ARRAY(char, sig_len); 3486 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string()); 3487 TempNewSymbol full_sig = SymbolTable::new_symbol(sig); 3488 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find); 3489 } 3490 3491 if (accessor_method != nullptr) { 3492 methodHandle method(THREAD, accessor_method); 3493 oop m = Reflection::new_method(method, false, CHECK_NULL); 3494 java_lang_reflect_RecordComponent::set_accessor(element(), m); 3495 } else { 3496 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr); 3497 } 3498 3499 int sig_index = component->generic_signature_index(); 3500 if (sig_index > 0) { 3501 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8 3502 oop component_sig = StringTable::intern(sig, CHECK_NULL); 3503 java_lang_reflect_RecordComponent::set_signature(element(), component_sig); 3504 } else { 3505 java_lang_reflect_RecordComponent::set_signature(element(), nullptr); 3506 } 3507 3508 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL); 3509 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop); 3510 3511 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL); 3512 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop); 3513 3514 return element(); 3515 } 3516 3517 int reflect_ConstantPool::_oop_offset; 3518 3519 #define CONSTANTPOOL_FIELDS_DO(macro) \ 3520 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 3521 3522 void reflect_ConstantPool::compute_offsets() { 3523 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass(); 3524 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3525 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3526 } 3527 3528 #if INCLUDE_CDS 3529 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) { 3530 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3531 } 3532 #endif 3533 3534 int java_lang_reflect_Parameter::_name_offset; 3535 int java_lang_reflect_Parameter::_modifiers_offset; 3536 int java_lang_reflect_Parameter::_index_offset; 3537 int java_lang_reflect_Parameter::_executable_offset; 3538 3539 #define PARAMETER_FIELDS_DO(macro) \ 3540 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3541 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3542 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3543 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3544 3545 void java_lang_reflect_Parameter::compute_offsets() { 3546 InstanceKlass* k = vmClasses::reflect_Parameter_klass(); 3547 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3548 } 3549 3550 #if INCLUDE_CDS 3551 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) { 3552 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3553 } 3554 #endif 3555 3556 Handle java_lang_reflect_Parameter::create(TRAPS) { 3557 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3558 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3559 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3560 InstanceKlass* ik = InstanceKlass::cast(k); 3561 // Ensure it is initialized 3562 ik->initialize(CHECK_NH); 3563 return ik->allocate_instance_handle(THREAD); 3564 } 3565 3566 oop java_lang_reflect_Parameter::name(oop param) { 3567 return param->obj_field(_name_offset); 3568 } 3569 3570 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3571 param->obj_field_put(_name_offset, value); 3572 } 3573 3574 int java_lang_reflect_Parameter::modifiers(oop param) { 3575 return param->int_field(_modifiers_offset); 3576 } 3577 3578 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3579 param->int_field_put(_modifiers_offset, value); 3580 } 3581 3582 int java_lang_reflect_Parameter::index(oop param) { 3583 return param->int_field(_index_offset); 3584 } 3585 3586 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3587 param->int_field_put(_index_offset, value); 3588 } 3589 3590 oop java_lang_reflect_Parameter::executable(oop param) { 3591 return param->obj_field(_executable_offset); 3592 } 3593 3594 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3595 param->obj_field_put(_executable_offset, value); 3596 } 3597 3598 // java_lang_Module 3599 3600 int java_lang_Module::_loader_offset; 3601 int java_lang_Module::_name_offset; 3602 int java_lang_Module::_module_entry_offset; 3603 3604 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3605 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3606 return JavaCalls::construct_new_instance(vmClasses::Module_klass(), 3607 vmSymbols::java_lang_module_init_signature(), 3608 loader, module_name, CHECK_NH); 3609 } 3610 3611 #define MODULE_FIELDS_DO(macro) \ 3612 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3613 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false) 3614 3615 void java_lang_Module::compute_offsets() { 3616 InstanceKlass* k = vmClasses::Module_klass(); 3617 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3618 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3619 } 3620 3621 #if INCLUDE_CDS 3622 void java_lang_Module::serialize_offsets(SerializeClosure* f) { 3623 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3624 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3625 } 3626 #endif 3627 3628 oop java_lang_Module::loader(oop module) { 3629 return module->obj_field(_loader_offset); 3630 } 3631 3632 void java_lang_Module::set_loader(oop module, oop value) { 3633 module->obj_field_put(_loader_offset, value); 3634 } 3635 3636 oop java_lang_Module::name(oop module) { 3637 return module->obj_field(_name_offset); 3638 } 3639 3640 void java_lang_Module::set_name(oop module, oop value) { 3641 module->obj_field_put(_name_offset, value); 3642 } 3643 3644 ModuleEntry* java_lang_Module::module_entry_raw(oop module) { 3645 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 3646 assert(module != nullptr, "module can't be null"); 3647 assert(oopDesc::is_oop(module), "module must be oop"); 3648 3649 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3650 return module_entry; 3651 } 3652 3653 ModuleEntry* java_lang_Module::module_entry(oop module) { 3654 ModuleEntry* module_entry = module_entry_raw(module); 3655 if (module_entry == nullptr) { 3656 // If the inject field containing the ModuleEntry* is null then return the 3657 // class loader's unnamed module. 3658 oop loader = java_lang_Module::loader(module); 3659 Handle h_loader = Handle(Thread::current(), loader); 3660 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3661 return loader_cld->unnamed_module(); 3662 } 3663 return module_entry; 3664 } 3665 3666 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3667 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 3668 assert(module != nullptr, "module can't be null"); 3669 assert(oopDesc::is_oop(module), "module must be oop"); 3670 module->address_field_put(_module_entry_offset, (address)module_entry); 3671 } 3672 3673 Handle reflect_ConstantPool::create(TRAPS) { 3674 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3675 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass(); 3676 // Ensure it is initialized 3677 k->initialize(CHECK_NH); 3678 return k->allocate_instance_handle(THREAD); 3679 } 3680 3681 3682 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3683 oop mirror = value->pool_holder()->java_mirror(); 3684 // Save the mirror to get back the constant pool. 3685 reflect->obj_field_put(_oop_offset, mirror); 3686 } 3687 3688 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3689 3690 oop mirror = reflect->obj_field(_oop_offset); 3691 Klass* k = java_lang_Class::as_Klass(mirror); 3692 assert(k->is_instance_klass(), "Must be"); 3693 3694 // Get the constant pool back from the klass. Since class redefinition 3695 // merges the new constant pool into the old, this is essentially the 3696 // same constant pool as the original. If constant pool merging is 3697 // no longer done in the future, this will have to change to save 3698 // the original. 3699 return InstanceKlass::cast(k)->constants(); 3700 } 3701 3702 3703 // Support for java_lang_ref_Reference 3704 3705 bool java_lang_ref_Reference::_offsets_initialized; 3706 3707 int java_lang_ref_Reference::_referent_offset; 3708 int java_lang_ref_Reference::_queue_offset; 3709 int java_lang_ref_Reference::_next_offset; 3710 int java_lang_ref_Reference::_discovered_offset; 3711 3712 #define REFERENCE_FIELDS_DO(macro) \ 3713 macro(_referent_offset, k, "referent", object_signature, false); \ 3714 macro(_queue_offset, k, "queue", referencequeue_signature, false); \ 3715 macro(_next_offset, k, "next", reference_signature, false); \ 3716 macro(_discovered_offset, k, "discovered", reference_signature, false); 3717 3718 void java_lang_ref_Reference::compute_offsets() { 3719 if (_offsets_initialized) { 3720 return; 3721 } 3722 _offsets_initialized = true; 3723 InstanceKlass* k = vmClasses::Reference_klass(); 3724 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3725 } 3726 3727 #if INCLUDE_CDS 3728 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) { 3729 f->do_bool(&_offsets_initialized); 3730 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3731 } 3732 #endif 3733 3734 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3735 assert(obj != nullptr, "sanity"); 3736 if (offset != _referent_offset) { 3737 return false; 3738 } 3739 3740 Klass* k = obj->klass(); 3741 if (!k->is_instance_klass()) { 3742 return false; 3743 } 3744 3745 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3746 bool is_reference = ik->reference_type() != REF_NONE; 3747 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity"); 3748 return is_reference; 3749 } 3750 3751 int java_lang_boxing_object::_value_offset; 3752 int java_lang_boxing_object::_long_value_offset; 3753 3754 #define BOXING_FIELDS_DO(macro) \ 3755 macro(_value_offset, integerKlass, "value", int_signature, false); \ 3756 macro(_long_value_offset, longKlass, "value", long_signature, false); 3757 3758 void java_lang_boxing_object::compute_offsets() { 3759 InstanceKlass* integerKlass = vmClasses::Integer_klass(); 3760 InstanceKlass* longKlass = vmClasses::Long_klass(); 3761 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3762 } 3763 3764 #if INCLUDE_CDS 3765 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) { 3766 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3767 } 3768 #endif 3769 3770 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 3771 Klass* k = vmClasses::box_klass(type); 3772 if (k == nullptr) return nullptr; 3773 InstanceKlass* ik = InstanceKlass::cast(k); 3774 if (!ik->is_initialized()) { 3775 ik->initialize(CHECK_NULL); 3776 } 3777 return ik->allocate_instance(THREAD); 3778 } 3779 3780 3781 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 3782 oop box = initialize_and_allocate(type, CHECK_NULL); 3783 if (box == nullptr) return nullptr; 3784 switch (type) { 3785 case T_BOOLEAN: 3786 box->bool_field_put(_value_offset, value->z); 3787 break; 3788 case T_CHAR: 3789 box->char_field_put(_value_offset, value->c); 3790 break; 3791 case T_FLOAT: 3792 box->float_field_put(_value_offset, value->f); 3793 break; 3794 case T_DOUBLE: 3795 box->double_field_put(_long_value_offset, value->d); 3796 break; 3797 case T_BYTE: 3798 box->byte_field_put(_value_offset, value->b); 3799 break; 3800 case T_SHORT: 3801 box->short_field_put(_value_offset, value->s); 3802 break; 3803 case T_INT: 3804 box->int_field_put(_value_offset, value->i); 3805 break; 3806 case T_LONG: 3807 box->long_field_put(_long_value_offset, value->j); 3808 break; 3809 default: 3810 return nullptr; 3811 } 3812 return box; 3813 } 3814 3815 3816 BasicType java_lang_boxing_object::basic_type(oop box) { 3817 if (box == nullptr) return T_ILLEGAL; 3818 BasicType type = vmClasses::box_klass_type(box->klass()); 3819 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 3820 return T_ILLEGAL; 3821 return type; 3822 } 3823 3824 3825 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 3826 BasicType type = vmClasses::box_klass_type(box->klass()); 3827 switch (type) { 3828 case T_BOOLEAN: 3829 value->z = box->bool_field(_value_offset); 3830 break; 3831 case T_CHAR: 3832 value->c = box->char_field(_value_offset); 3833 break; 3834 case T_FLOAT: 3835 value->f = box->float_field(_value_offset); 3836 break; 3837 case T_DOUBLE: 3838 value->d = box->double_field(_long_value_offset); 3839 break; 3840 case T_BYTE: 3841 value->b = box->byte_field(_value_offset); 3842 break; 3843 case T_SHORT: 3844 value->s = box->short_field(_value_offset); 3845 break; 3846 case T_INT: 3847 value->i = box->int_field(_value_offset); 3848 break; 3849 case T_LONG: 3850 value->j = box->long_field(_long_value_offset); 3851 break; 3852 default: 3853 return T_ILLEGAL; 3854 } // end switch 3855 return type; 3856 } 3857 3858 3859 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3860 BasicType type = vmClasses::box_klass_type(box->klass()); 3861 switch (type) { 3862 case T_BOOLEAN: 3863 box->bool_field_put(_value_offset, value->z); 3864 break; 3865 case T_CHAR: 3866 box->char_field_put(_value_offset, value->c); 3867 break; 3868 case T_FLOAT: 3869 box->float_field_put(_value_offset, value->f); 3870 break; 3871 case T_DOUBLE: 3872 box->double_field_put(_long_value_offset, value->d); 3873 break; 3874 case T_BYTE: 3875 box->byte_field_put(_value_offset, value->b); 3876 break; 3877 case T_SHORT: 3878 box->short_field_put(_value_offset, value->s); 3879 break; 3880 case T_INT: 3881 box->int_field_put(_value_offset, value->i); 3882 break; 3883 case T_LONG: 3884 box->long_field_put(_long_value_offset, value->j); 3885 break; 3886 default: 3887 return T_ILLEGAL; 3888 } // end switch 3889 return type; 3890 } 3891 3892 3893 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3894 switch (type) { 3895 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3896 case T_CHAR: st->print("%d", value->c); break; 3897 case T_BYTE: st->print("%d", value->b); break; 3898 case T_SHORT: st->print("%d", value->s); break; 3899 case T_INT: st->print("%d", value->i); break; 3900 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 3901 case T_FLOAT: st->print("%f", value->f); break; 3902 case T_DOUBLE: st->print("%lf", value->d); break; 3903 default: st->print("type %d?", type); break; 3904 } 3905 } 3906 3907 3908 // Support for java_lang_ref_SoftReference 3909 // 3910 3911 int java_lang_ref_SoftReference::_timestamp_offset; 3912 int java_lang_ref_SoftReference::_static_clock_offset; 3913 3914 #define SOFTREFERENCE_FIELDS_DO(macro) \ 3915 macro(_timestamp_offset, k, "timestamp", long_signature, false); \ 3916 macro(_static_clock_offset, k, "clock", long_signature, true) 3917 3918 void java_lang_ref_SoftReference::compute_offsets() { 3919 InstanceKlass* k = vmClasses::SoftReference_klass(); 3920 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3921 } 3922 3923 #if INCLUDE_CDS 3924 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) { 3925 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3926 } 3927 #endif 3928 3929 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3930 return ref->long_field(_timestamp_offset); 3931 } 3932 3933 jlong java_lang_ref_SoftReference::clock() { 3934 InstanceKlass* ik = vmClasses::SoftReference_klass(); 3935 oop base = ik->static_field_base_raw(); 3936 return base->long_field(_static_clock_offset); 3937 } 3938 3939 void java_lang_ref_SoftReference::set_clock(jlong value) { 3940 InstanceKlass* ik = vmClasses::SoftReference_klass(); 3941 oop base = ik->static_field_base_raw(); 3942 base->long_field_put(_static_clock_offset, value); 3943 } 3944 3945 // Support for java_lang_invoke_DirectMethodHandle 3946 3947 int java_lang_invoke_DirectMethodHandle::_member_offset; 3948 3949 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3950 oop member_name = nullptr; 3951 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 3952 "a DirectMethodHandle oop is expected"); 3953 return dmh->obj_field(_member_offset); 3954 } 3955 3956 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 3957 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 3958 3959 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3960 InstanceKlass* k = vmClasses::DirectMethodHandle_klass(); 3961 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3962 } 3963 3964 #if INCLUDE_CDS 3965 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) { 3966 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3967 } 3968 #endif 3969 3970 // Support for java_lang_invoke_MethodHandle 3971 3972 int java_lang_invoke_MethodHandle::_type_offset; 3973 int java_lang_invoke_MethodHandle::_form_offset; 3974 3975 int java_lang_invoke_MemberName::_clazz_offset; 3976 int java_lang_invoke_MemberName::_name_offset; 3977 int java_lang_invoke_MemberName::_type_offset; 3978 int java_lang_invoke_MemberName::_flags_offset; 3979 int java_lang_invoke_MemberName::_method_offset; 3980 int java_lang_invoke_MemberName::_vmindex_offset; 3981 3982 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 3983 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 3984 3985 int java_lang_invoke_LambdaForm::_vmentry_offset; 3986 3987 #define METHODHANDLE_FIELDS_DO(macro) \ 3988 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 3989 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 3990 3991 void java_lang_invoke_MethodHandle::compute_offsets() { 3992 InstanceKlass* k = vmClasses::MethodHandle_klass(); 3993 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3994 } 3995 3996 #if INCLUDE_CDS 3997 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) { 3998 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3999 } 4000 #endif 4001 4002 #define MEMBERNAME_FIELDS_DO(macro) \ 4003 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 4004 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 4005 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 4006 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 4007 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 4008 4009 void java_lang_invoke_MemberName::compute_offsets() { 4010 InstanceKlass* k = vmClasses::MemberName_klass(); 4011 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4012 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4013 } 4014 4015 #if INCLUDE_CDS 4016 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) { 4017 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4018 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4019 } 4020 #endif 4021 4022 #define RESOLVEDMETHOD_FIELDS_DO(macro) \ 4023 macro(_vmholder_offset, k, "vmholder", class_signature, false) 4024 4025 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 4026 InstanceKlass* k = vmClasses::ResolvedMethodName_klass(); 4027 assert(k != nullptr, "jdk mismatch"); 4028 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4029 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4030 } 4031 4032 #if INCLUDE_CDS 4033 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) { 4034 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4035 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4036 } 4037 #endif 4038 4039 #define LAMBDAFORM_FIELDS_DO(macro) \ 4040 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 4041 4042 void java_lang_invoke_LambdaForm::compute_offsets() { 4043 InstanceKlass* k = vmClasses::LambdaForm_klass(); 4044 assert (k != nullptr, "jdk mismatch"); 4045 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4046 } 4047 4048 #if INCLUDE_CDS 4049 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) { 4050 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4051 } 4052 #endif 4053 4054 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 4055 return obj != nullptr && is_subclass(obj->klass()); 4056 } 4057 4058 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset; 4059 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset; 4060 4061 #define NEP_FIELDS_DO(macro) \ 4062 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \ 4063 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false); 4064 4065 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) { 4066 return obj != nullptr && is_subclass(obj->klass()); 4067 } 4068 4069 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() { 4070 InstanceKlass* k = vmClasses::NativeEntryPoint_klass(); 4071 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4072 } 4073 4074 #if INCLUDE_CDS 4075 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) { 4076 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4077 } 4078 #endif 4079 4080 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) { 4081 return entry->obj_field(_method_type_offset); 4082 } 4083 4084 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) { 4085 return entry->long_field(_downcall_stub_address_offset); 4086 } 4087 4088 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset; 4089 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset; 4090 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset; 4091 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset; 4092 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset; 4093 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset; 4094 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset; 4095 4096 #define ABIDescriptor_FIELDS_DO(macro) \ 4097 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4098 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4099 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4100 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \ 4101 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \ 4102 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \ 4103 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false); 4104 4105 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) { 4106 return obj != nullptr && is_subclass(obj->klass()); 4107 } 4108 4109 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() { 4110 InstanceKlass* k = vmClasses::ABIDescriptor_klass(); 4111 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4112 } 4113 4114 #if INCLUDE_CDS 4115 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) { 4116 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4117 } 4118 #endif 4119 4120 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) { 4121 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset)); 4122 } 4123 4124 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) { 4125 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset)); 4126 } 4127 4128 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) { 4129 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset)); 4130 } 4131 4132 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) { 4133 return entry->int_field(_stackAlignment_offset); 4134 } 4135 4136 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) { 4137 return entry->int_field(_shadowSpace_offset); 4138 } 4139 4140 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) { 4141 return entry->obj_field(_scratch1_offset); 4142 } 4143 4144 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) { 4145 return entry->obj_field(_scratch2_offset); 4146 } 4147 4148 int jdk_internal_foreign_abi_VMStorage::_type_offset; 4149 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset; 4150 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset; 4151 int jdk_internal_foreign_abi_VMStorage::_debugName_offset; 4152 4153 #define VMStorage_FIELDS_DO(macro) \ 4154 macro(_type_offset, k, "type", byte_signature, false); \ 4155 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \ 4156 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \ 4157 macro(_debugName_offset, k, "debugName", string_signature, false); \ 4158 4159 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) { 4160 return obj != nullptr && is_subclass(obj->klass()); 4161 } 4162 4163 void jdk_internal_foreign_abi_VMStorage::compute_offsets() { 4164 InstanceKlass* k = vmClasses::VMStorage_klass(); 4165 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4166 } 4167 4168 #if INCLUDE_CDS 4169 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) { 4170 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4171 } 4172 #endif 4173 4174 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) { 4175 return entry->byte_field(_type_offset); 4176 } 4177 4178 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) { 4179 return entry->int_field(_indexOrOffset_offset); 4180 } 4181 4182 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) { 4183 return entry->short_field(_segmentMaskOrSize_offset); 4184 } 4185 4186 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) { 4187 return entry->obj_field(_debugName_offset); 4188 } 4189 4190 int jdk_internal_foreign_abi_CallConv::_argRegs_offset; 4191 int jdk_internal_foreign_abi_CallConv::_retRegs_offset; 4192 4193 #define CallConv_FIELDS_DO(macro) \ 4194 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \ 4195 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \ 4196 4197 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) { 4198 return obj != nullptr && is_subclass(obj->klass()); 4199 } 4200 4201 void jdk_internal_foreign_abi_CallConv::compute_offsets() { 4202 InstanceKlass* k = vmClasses::CallConv_klass(); 4203 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4204 } 4205 4206 #if INCLUDE_CDS 4207 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) { 4208 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4209 } 4210 #endif 4211 4212 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) { 4213 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset)); 4214 } 4215 4216 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) { 4217 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset)); 4218 } 4219 4220 oop java_lang_invoke_MethodHandle::type(oop mh) { 4221 return mh->obj_field(_type_offset); 4222 } 4223 4224 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 4225 mh->obj_field_put(_type_offset, mtype); 4226 } 4227 4228 oop java_lang_invoke_MethodHandle::form(oop mh) { 4229 assert(_form_offset != 0, ""); 4230 return mh->obj_field(_form_offset); 4231 } 4232 4233 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 4234 assert(_form_offset != 0, ""); 4235 mh->obj_field_put(_form_offset, lform); 4236 } 4237 4238 /// MemberName accessors 4239 4240 oop java_lang_invoke_MemberName::clazz(oop mname) { 4241 assert(is_instance(mname), "wrong type"); 4242 return mname->obj_field(_clazz_offset); 4243 } 4244 4245 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 4246 assert(is_instance(mname), "wrong type"); 4247 mname->obj_field_put(_clazz_offset, clazz); 4248 } 4249 4250 oop java_lang_invoke_MemberName::name(oop mname) { 4251 assert(is_instance(mname), "wrong type"); 4252 return mname->obj_field(_name_offset); 4253 } 4254 4255 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 4256 assert(is_instance(mname), "wrong type"); 4257 mname->obj_field_put(_name_offset, name); 4258 } 4259 4260 oop java_lang_invoke_MemberName::type(oop mname) { 4261 assert(is_instance(mname), "wrong type"); 4262 return mname->obj_field(_type_offset); 4263 } 4264 4265 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 4266 assert(is_instance(mname), "wrong type"); 4267 mname->obj_field_put(_type_offset, type); 4268 } 4269 4270 int java_lang_invoke_MemberName::flags(oop mname) { 4271 assert(is_instance(mname), "wrong type"); 4272 return mname->int_field(_flags_offset); 4273 } 4274 4275 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 4276 assert(is_instance(mname), "wrong type"); 4277 mname->int_field_put(_flags_offset, flags); 4278 } 4279 4280 4281 // Return vmtarget from ResolvedMethodName method field through indirection 4282 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 4283 assert(is_instance(mname), "wrong type"); 4284 oop method = mname->obj_field(_method_offset); 4285 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method); 4286 } 4287 4288 bool java_lang_invoke_MemberName::is_method(oop mname) { 4289 assert(is_instance(mname), "must be MemberName"); 4290 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 4291 } 4292 4293 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 4294 assert(is_instance(mname), "wrong type"); 4295 mname->obj_field_put(_method_offset, resolved_method); 4296 } 4297 4298 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 4299 assert(is_instance(mname), "wrong type"); 4300 return (intptr_t) mname->address_field(_vmindex_offset); 4301 } 4302 4303 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 4304 assert(is_instance(mname), "wrong type"); 4305 mname->address_field_put(_vmindex_offset, (address) index); 4306 } 4307 4308 4309 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 4310 assert(is_instance(resolved_method), "wrong type"); 4311 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 4312 assert(m->is_method(), "must be"); 4313 return m; 4314 } 4315 4316 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 4317 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 4318 assert(is_instance(resolved_method), "wrong type"); 4319 resolved_method->address_field_put(_vmtarget_offset, (address)m); 4320 } 4321 4322 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) { 4323 assert(is_instance(resolved_method), "wrong type"); 4324 resolved_method->obj_field_put(_vmholder_offset, holder); 4325 } 4326 4327 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 4328 const Method* method = m(); 4329 4330 // lookup ResolvedMethod oop in the table, or create a new one and intern it 4331 oop resolved_method = ResolvedMethodTable::find_method(method); 4332 if (resolved_method != nullptr) { 4333 return resolved_method; 4334 } 4335 4336 InstanceKlass* k = vmClasses::ResolvedMethodName_klass(); 4337 if (!k->is_initialized()) { 4338 k->initialize(CHECK_NULL); 4339 } 4340 4341 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 4342 4343 NoSafepointVerifier nsv; 4344 4345 if (method->is_old()) { 4346 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() : 4347 method->get_new_method(); 4348 } 4349 4350 InstanceKlass* holder = method->method_holder(); 4351 4352 set_vmtarget(new_resolved_method, const_cast<Method*>(method)); 4353 // Add a reference to the loader (actually mirror because hidden classes may not have 4354 // distinct loaders) to ensure the metadata is kept alive. 4355 // This mirror may be different than the one in clazz field. 4356 set_vmholder(new_resolved_method, holder->java_mirror()); 4357 4358 // Set flag in class to indicate this InstanceKlass has entries in the table 4359 // to avoid walking table during redefinition if none of the redefined classes 4360 // have any membernames in the table. 4361 holder->set_has_resolved_methods(); 4362 4363 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method)); 4364 } 4365 4366 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 4367 assert(is_instance(lform), "wrong type"); 4368 return lform->obj_field(_vmentry_offset); 4369 } 4370 4371 4372 // Support for java_lang_invoke_MethodType 4373 4374 int java_lang_invoke_MethodType::_rtype_offset; 4375 int java_lang_invoke_MethodType::_ptypes_offset; 4376 4377 #define METHODTYPE_FIELDS_DO(macro) \ 4378 macro(_rtype_offset, k, "rtype", class_signature, false); \ 4379 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 4380 4381 void java_lang_invoke_MethodType::compute_offsets() { 4382 InstanceKlass* k = vmClasses::MethodType_klass(); 4383 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4384 } 4385 4386 #if INCLUDE_CDS 4387 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) { 4388 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4389 } 4390 #endif 4391 4392 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 4393 st->print("("); 4394 objArrayOop pts = ptypes(mt); 4395 if (pts != nullptr) { 4396 for (int i = 0, limit = pts->length(); i < limit; i++) { 4397 java_lang_Class::print_signature(pts->obj_at(i), st); 4398 } 4399 } else { 4400 st->print("null"); 4401 } 4402 st->print(")"); 4403 oop rt = rtype(mt); 4404 if (rt != nullptr) { 4405 java_lang_Class::print_signature(rt, st); 4406 } else { 4407 st->print("null"); 4408 } 4409 } 4410 4411 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) { 4412 ResourceMark rm; 4413 stringStream buffer(128); 4414 print_signature(mt, &buffer); 4415 const char* sigstr = buffer.base(); 4416 int siglen = (int) buffer.size(); 4417 Symbol *name; 4418 if (!intern_if_not_found) { 4419 name = SymbolTable::probe(sigstr, siglen); 4420 } else { 4421 name = SymbolTable::new_symbol(sigstr, siglen); 4422 } 4423 return name; 4424 } 4425 4426 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 4427 if (mt1 == mt2) 4428 return true; 4429 if (rtype(mt1) != rtype(mt2)) 4430 return false; 4431 if (ptype_count(mt1) != ptype_count(mt2)) 4432 return false; 4433 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 4434 if (ptype(mt1, i) != ptype(mt2, i)) 4435 return false; 4436 } 4437 return true; 4438 } 4439 4440 oop java_lang_invoke_MethodType::rtype(oop mt) { 4441 assert(is_instance(mt), "must be a MethodType"); 4442 return mt->obj_field(_rtype_offset); 4443 } 4444 4445 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 4446 assert(is_instance(mt), "must be a MethodType"); 4447 return (objArrayOop) mt->obj_field(_ptypes_offset); 4448 } 4449 4450 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 4451 return ptypes(mt)->obj_at(idx); 4452 } 4453 4454 int java_lang_invoke_MethodType::ptype_count(oop mt) { 4455 return ptypes(mt)->length(); 4456 } 4457 4458 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 4459 objArrayOop pts = ptypes(mt); 4460 int count = pts->length(); 4461 int slots = 0; 4462 for (int i = 0; i < count; i++) { 4463 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 4464 slots += type2size[bt]; 4465 } 4466 return slots; 4467 } 4468 4469 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 4470 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 4471 return type2size[bt]; 4472 } 4473 4474 4475 // Support for java_lang_invoke_CallSite 4476 4477 int java_lang_invoke_CallSite::_target_offset; 4478 int java_lang_invoke_CallSite::_context_offset; 4479 4480 #define CALLSITE_FIELDS_DO(macro) \ 4481 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 4482 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false) 4483 4484 void java_lang_invoke_CallSite::compute_offsets() { 4485 InstanceKlass* k = vmClasses::CallSite_klass(); 4486 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4487 } 4488 4489 #if INCLUDE_CDS 4490 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) { 4491 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4492 } 4493 #endif 4494 4495 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) { 4496 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 4497 4498 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset); 4499 return dep_oop; 4500 } 4501 4502 // Support for java_lang_invoke_ConstantCallSite 4503 4504 int java_lang_invoke_ConstantCallSite::_is_frozen_offset; 4505 4506 #define CONSTANTCALLSITE_FIELDS_DO(macro) \ 4507 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false) 4508 4509 void java_lang_invoke_ConstantCallSite::compute_offsets() { 4510 InstanceKlass* k = vmClasses::ConstantCallSite_klass(); 4511 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4512 } 4513 4514 #if INCLUDE_CDS 4515 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) { 4516 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4517 } 4518 #endif 4519 4520 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 4521 4522 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 4523 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset; 4524 4525 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 4526 InstanceKlass* k = vmClasses::Context_klass(); 4527 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4528 } 4529 4530 #if INCLUDE_CDS 4531 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) { 4532 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4533 } 4534 #endif 4535 4536 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 4537 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 4538 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset); 4539 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset); 4540 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr); 4541 return dep_ctx; 4542 } 4543 4544 // Support for java_security_AccessControlContext 4545 4546 int java_security_AccessControlContext::_context_offset; 4547 int java_security_AccessControlContext::_privilegedContext_offset; 4548 int java_security_AccessControlContext::_isPrivileged_offset; 4549 int java_security_AccessControlContext::_isAuthorized_offset; 4550 4551 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \ 4552 macro(_context_offset, k, "context", protectiondomain_signature, false); \ 4553 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \ 4554 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \ 4555 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false) 4556 4557 void java_security_AccessControlContext::compute_offsets() { 4558 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 4559 InstanceKlass* k = vmClasses::AccessControlContext_klass(); 4560 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4561 } 4562 4563 #if INCLUDE_CDS 4564 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) { 4565 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4566 } 4567 #endif 4568 4569 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 4570 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 4571 assert(_isAuthorized_offset != 0, "offsets should have been initialized"); 4572 // Ensure klass is initialized 4573 vmClasses::AccessControlContext_klass()->initialize(CHECK_NULL); 4574 // Allocate result 4575 oop result = vmClasses::AccessControlContext_klass()->allocate_instance(CHECK_NULL); 4576 // Fill in values 4577 result->obj_field_put(_context_offset, context()); 4578 result->obj_field_put(_privilegedContext_offset, privileged_context()); 4579 result->bool_field_put(_isPrivileged_offset, isPrivileged); 4580 result->bool_field_put(_isAuthorized_offset, true); 4581 return result; 4582 } 4583 4584 4585 // Support for java_lang_ClassLoader 4586 4587 int java_lang_ClassLoader::_loader_data_offset; 4588 int java_lang_ClassLoader::_parallelCapable_offset; 4589 int java_lang_ClassLoader::_name_offset; 4590 int java_lang_ClassLoader::_nameAndId_offset; 4591 int java_lang_ClassLoader::_unnamedModule_offset; 4592 int java_lang_ClassLoader::_parent_offset; 4593 4594 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) { 4595 assert(loader != nullptr, "loader must not be null"); 4596 assert(oopDesc::is_oop(loader), "loader must be oop"); 4597 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset)); 4598 } 4599 4600 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 4601 assert(loader != nullptr, "loader must not be null"); 4602 assert(oopDesc::is_oop(loader), "loader must be oop"); 4603 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset); 4604 } 4605 4606 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) { 4607 assert(loader != nullptr, "loader must not be null"); 4608 assert(oopDesc::is_oop(loader), "loader must be oop"); 4609 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data); 4610 } 4611 4612 #define CLASSLOADER_FIELDS_DO(macro) \ 4613 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 4614 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 4615 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \ 4616 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 4617 macro(_parent_offset, k1, "parent", classloader_signature, false) 4618 4619 void java_lang_ClassLoader::compute_offsets() { 4620 InstanceKlass* k1 = vmClasses::ClassLoader_klass(); 4621 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4622 4623 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4624 } 4625 4626 #if INCLUDE_CDS 4627 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) { 4628 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4629 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4630 } 4631 #endif 4632 4633 oop java_lang_ClassLoader::parent(oop loader) { 4634 assert(is_instance(loader), "loader must be oop"); 4635 return loader->obj_field(_parent_offset); 4636 } 4637 4638 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) { 4639 assert(is_instance(loader), "loader must be oop"); 4640 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset); 4641 } 4642 4643 // Returns the name field of this class loader. If the name field has not 4644 // been set, null will be returned. 4645 oop java_lang_ClassLoader::name(oop loader) { 4646 assert(is_instance(loader), "loader must be oop"); 4647 return loader->obj_field(_name_offset); 4648 } 4649 4650 // Returns the nameAndId field of this class loader. The format is 4651 // as follows: 4652 // If the defining loader has a name explicitly set then '<loader-name>' @<id> 4653 // If the defining loader has no name then <qualified-class-name> @<id> 4654 // If built-in loader, then omit '@<id>' as there is only one instance. 4655 // Use ClassLoader::loader_name_id() to obtain this String as a char*. 4656 oop java_lang_ClassLoader::nameAndId(oop loader) { 4657 assert(is_instance(loader), "loader must be oop"); 4658 return loader->obj_field(_nameAndId_offset); 4659 } 4660 4661 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 4662 assert(is_instance(loader), "loader must be oop"); 4663 assert(cl == nullptr || is_instance(cl), "cl argument must be oop"); 4664 oop acl = loader; 4665 debug_only(jint loop_count = 0); 4666 // This loop taken verbatim from ClassLoader.java: 4667 do { 4668 acl = parent(acl); 4669 if (cl == acl) { 4670 return true; 4671 } 4672 assert(++loop_count > 0, "loop_count overflow"); 4673 } while (acl != nullptr); 4674 return false; 4675 } 4676 4677 bool java_lang_ClassLoader::is_instance(oop obj) { 4678 return obj != nullptr && is_subclass(obj->klass()); 4679 } 4680 4681 4682 // For class loader classes, parallelCapable defined 4683 // based on non-null field 4684 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 4685 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 4686 assert(_parallelCapable_offset != 0, "offsets should have been initialized"); 4687 return (class_loader->obj_field(_parallelCapable_offset) != nullptr); 4688 } 4689 4690 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 4691 // Fix for 4474172; see evaluation for more details 4692 loader = non_reflection_class_loader(loader); 4693 4694 oop cl = SystemDictionary::java_system_loader(); 4695 while(cl != nullptr) { 4696 if (cl == loader) return true; 4697 cl = parent(cl); 4698 } 4699 return false; 4700 } 4701 4702 // Return true if this is one of the class loaders associated with 4703 // the generated bytecodes for serialization constructor returned 4704 // by sun.reflect.ReflectionFactory::newConstructorForSerialization 4705 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 4706 if (loader != nullptr) { 4707 Klass* delegating_cl_class = vmClasses::reflect_DelegatingClassLoader_klass(); 4708 // This might be null in non-1.4 JDKs 4709 return (delegating_cl_class != nullptr && loader->is_a(delegating_cl_class)); 4710 } 4711 return false; 4712 } 4713 4714 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 4715 // See whether this is one of the class loaders associated with 4716 // the generated bytecodes for reflection, and if so, "magically" 4717 // delegate to its parent to prevent class loading from occurring 4718 // in places where applications using reflection didn't expect it. 4719 if (is_reflection_class_loader(loader)) { 4720 return parent(loader); 4721 } 4722 return loader; 4723 } 4724 4725 oop java_lang_ClassLoader::unnamedModule(oop loader) { 4726 assert(is_instance(loader), "loader must be oop"); 4727 return loader->obj_field(_unnamedModule_offset); 4728 } 4729 4730 // Support for java_lang_System 4731 // 4732 4733 int java_lang_System::_static_in_offset; 4734 int java_lang_System::_static_out_offset; 4735 int java_lang_System::_static_err_offset; 4736 int java_lang_System::_static_security_offset; 4737 int java_lang_System::_static_allow_security_offset; 4738 int java_lang_System::_static_never_offset; 4739 4740 #define SYSTEM_FIELDS_DO(macro) \ 4741 macro(_static_in_offset, k, "in", input_stream_signature, true); \ 4742 macro(_static_out_offset, k, "out", print_stream_signature, true); \ 4743 macro(_static_err_offset, k, "err", print_stream_signature, true); \ 4744 macro(_static_security_offset, k, "security", security_manager_signature, true); \ 4745 macro(_static_allow_security_offset, k, "allowSecurityManager", int_signature, true); \ 4746 macro(_static_never_offset, k, "NEVER", int_signature, true) 4747 4748 void java_lang_System::compute_offsets() { 4749 InstanceKlass* k = vmClasses::System_klass(); 4750 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4751 } 4752 4753 // This field tells us that a security manager can never be installed so we 4754 // can completely skip populating the ProtectionDomainCacheTable. 4755 bool java_lang_System::allow_security_manager() { 4756 static int initialized = false; 4757 static bool allowed = true; // default 4758 if (!initialized) { 4759 oop base = vmClasses::System_klass()->static_field_base_raw(); 4760 int never = base->int_field(_static_never_offset); 4761 allowed = (base->int_field(_static_allow_security_offset) != never); 4762 initialized = true; 4763 } 4764 return allowed; 4765 } 4766 4767 // This field tells us that a security manager is installed. 4768 bool java_lang_System::has_security_manager() { 4769 oop base = vmClasses::System_klass()->static_field_base_raw(); 4770 return base->obj_field(_static_security_offset) != nullptr; 4771 } 4772 4773 #if INCLUDE_CDS 4774 void java_lang_System::serialize_offsets(SerializeClosure* f) { 4775 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4776 } 4777 #endif 4778 4779 // Support for jdk_internal_misc_UnsafeConstants 4780 // 4781 class UnsafeConstantsFixup : public FieldClosure { 4782 private: 4783 int _address_size; 4784 int _page_size; 4785 bool _big_endian; 4786 bool _use_unaligned_access; 4787 int _data_cache_line_flush_size; 4788 public: 4789 UnsafeConstantsFixup() { 4790 // round up values for all static final fields 4791 _address_size = sizeof(void*); 4792 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size()); 4793 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true); 4794 _use_unaligned_access = UseUnalignedAccesses; 4795 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size(); 4796 } 4797 4798 void do_field(fieldDescriptor* fd) { 4799 oop mirror = fd->field_holder()->java_mirror(); 4800 assert(mirror != nullptr, "UnsafeConstants must have mirror already"); 4801 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants"); 4802 assert(fd->is_final(), "fields of UnsafeConstants must be final"); 4803 assert(fd->is_static(), "fields of UnsafeConstants must be static"); 4804 if (fd->name() == vmSymbols::address_size_name()) { 4805 mirror->int_field_put(fd->offset(), _address_size); 4806 } else if (fd->name() == vmSymbols::page_size_name()) { 4807 mirror->int_field_put(fd->offset(), _page_size); 4808 } else if (fd->name() == vmSymbols::big_endian_name()) { 4809 mirror->bool_field_put(fd->offset(), _big_endian); 4810 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) { 4811 mirror->bool_field_put(fd->offset(), _use_unaligned_access); 4812 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) { 4813 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size); 4814 } else { 4815 assert(false, "unexpected UnsafeConstants field"); 4816 } 4817 } 4818 }; 4819 4820 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() { 4821 UnsafeConstantsFixup fixup; 4822 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup); 4823 } 4824 4825 4826 // java_lang_StackTraceElement 4827 4828 int java_lang_StackTraceElement::_methodName_offset; 4829 int java_lang_StackTraceElement::_fileName_offset; 4830 int java_lang_StackTraceElement::_lineNumber_offset; 4831 int java_lang_StackTraceElement::_moduleName_offset; 4832 int java_lang_StackTraceElement::_moduleVersion_offset; 4833 int java_lang_StackTraceElement::_classLoaderName_offset; 4834 int java_lang_StackTraceElement::_declaringClass_offset; 4835 int java_lang_StackTraceElement::_declaringClassObject_offset; 4836 4837 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4838 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4839 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4840 macro(_moduleName_offset, k, "moduleName", string_signature, false); \ 4841 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4842 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \ 4843 macro(_methodName_offset, k, "methodName", string_signature, false); \ 4844 macro(_fileName_offset, k, "fileName", string_signature, false); \ 4845 macro(_lineNumber_offset, k, "lineNumber", int_signature, false) 4846 4847 // Support for java_lang_StackTraceElement 4848 void java_lang_StackTraceElement::compute_offsets() { 4849 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 4850 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4851 } 4852 4853 #if INCLUDE_CDS 4854 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) { 4855 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4856 } 4857 #endif 4858 4859 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 4860 element->obj_field_put(_fileName_offset, value); 4861 } 4862 4863 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 4864 element->obj_field_put(_declaringClass_offset, value); 4865 } 4866 4867 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 4868 element->obj_field_put(_methodName_offset, value); 4869 } 4870 4871 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 4872 element->int_field_put(_lineNumber_offset, value); 4873 } 4874 4875 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 4876 element->obj_field_put(_moduleName_offset, value); 4877 } 4878 4879 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 4880 element->obj_field_put(_moduleVersion_offset, value); 4881 } 4882 4883 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 4884 element->obj_field_put(_classLoaderName_offset, value); 4885 } 4886 4887 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 4888 element->obj_field_put(_declaringClassObject_offset, value); 4889 } 4890 4891 4892 // java_lang_AssertionStatusDirectives 4893 4894 int java_lang_AssertionStatusDirectives::_classes_offset; 4895 int java_lang_AssertionStatusDirectives::_classEnabled_offset; 4896 int java_lang_AssertionStatusDirectives::_packages_offset; 4897 int java_lang_AssertionStatusDirectives::_packageEnabled_offset; 4898 int java_lang_AssertionStatusDirectives::_deflt_offset; 4899 4900 // Support for java Assertions - java_lang_AssertionStatusDirectives. 4901 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 4902 macro(_classes_offset, k, "classes", string_array_signature, false); \ 4903 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 4904 macro(_packages_offset, k, "packages", string_array_signature, false); \ 4905 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 4906 macro(_deflt_offset, k, "deflt", bool_signature, false) 4907 4908 void java_lang_AssertionStatusDirectives::compute_offsets() { 4909 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass(); 4910 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4911 } 4912 4913 #if INCLUDE_CDS 4914 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) { 4915 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4916 } 4917 #endif 4918 4919 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 4920 o->obj_field_put(_classes_offset, val); 4921 } 4922 4923 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 4924 o->obj_field_put(_classEnabled_offset, val); 4925 } 4926 4927 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 4928 o->obj_field_put(_packages_offset, val); 4929 } 4930 4931 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 4932 o->obj_field_put(_packageEnabled_offset, val); 4933 } 4934 4935 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 4936 o->bool_field_put(_deflt_offset, val); 4937 } 4938 4939 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset; 4940 4941 #define AOS_FIELDS_DO(macro) \ 4942 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false) 4943 4944 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() { 4945 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass(); 4946 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4947 } 4948 4949 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 4950 assert(_owner_offset != 0, "Must be initialized"); 4951 return obj->obj_field(_owner_offset); 4952 } 4953 4954 #if INCLUDE_CDS 4955 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) { 4956 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4957 } 4958 #endif 4959 4960 int vector_VectorPayload::_payload_offset; 4961 4962 #define VECTORPAYLOAD_FIELDS_DO(macro) \ 4963 macro(_payload_offset, k, "payload", object_signature, false) 4964 4965 void vector_VectorPayload::compute_offsets() { 4966 InstanceKlass* k = vmClasses::vector_VectorPayload_klass(); 4967 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4968 } 4969 4970 #if INCLUDE_CDS 4971 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) { 4972 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4973 } 4974 #endif 4975 4976 void vector_VectorPayload::set_payload(oop o, oop val) { 4977 o->obj_field_put(_payload_offset, val); 4978 } 4979 4980 bool vector_VectorPayload::is_instance(oop obj) { 4981 return obj != nullptr && is_subclass(obj->klass()); 4982 } 4983 4984 int java_lang_Integer_IntegerCache::_static_cache_offset; 4985 int java_lang_Long_LongCache::_static_cache_offset; 4986 int java_lang_Character_CharacterCache::_static_cache_offset; 4987 int java_lang_Short_ShortCache::_static_cache_offset; 4988 int java_lang_Byte_ByteCache::_static_cache_offset; 4989 4990 #define INTEGER_CACHE_FIELDS_DO(macro) \ 4991 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true) 4992 4993 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) { 4994 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 4995 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4996 } 4997 4998 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) { 4999 oop base = ik->static_field_base_raw(); 5000 return objArrayOop(base->obj_field(_static_cache_offset)); 5001 } 5002 5003 Symbol* java_lang_Integer_IntegerCache::symbol() { 5004 return vmSymbols::java_lang_Integer_IntegerCache(); 5005 } 5006 5007 #if INCLUDE_CDS 5008 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) { 5009 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5010 } 5011 #endif 5012 #undef INTEGER_CACHE_FIELDS_DO 5013 5014 jint java_lang_Integer::value(oop obj) { 5015 jvalue v; 5016 java_lang_boxing_object::get_value(obj, &v); 5017 return v.i; 5018 } 5019 5020 #define LONG_CACHE_FIELDS_DO(macro) \ 5021 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true) 5022 5023 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) { 5024 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5025 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5026 } 5027 5028 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) { 5029 oop base = ik->static_field_base_raw(); 5030 return objArrayOop(base->obj_field(_static_cache_offset)); 5031 } 5032 5033 Symbol* java_lang_Long_LongCache::symbol() { 5034 return vmSymbols::java_lang_Long_LongCache(); 5035 } 5036 5037 #if INCLUDE_CDS 5038 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) { 5039 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5040 } 5041 #endif 5042 #undef LONG_CACHE_FIELDS_DO 5043 5044 jlong java_lang_Long::value(oop obj) { 5045 jvalue v; 5046 java_lang_boxing_object::get_value(obj, &v); 5047 return v.j; 5048 } 5049 5050 #define CHARACTER_CACHE_FIELDS_DO(macro) \ 5051 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true) 5052 5053 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) { 5054 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5055 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5056 } 5057 5058 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) { 5059 oop base = ik->static_field_base_raw(); 5060 return objArrayOop(base->obj_field(_static_cache_offset)); 5061 } 5062 5063 Symbol* java_lang_Character_CharacterCache::symbol() { 5064 return vmSymbols::java_lang_Character_CharacterCache(); 5065 } 5066 5067 #if INCLUDE_CDS 5068 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) { 5069 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5070 } 5071 #endif 5072 #undef CHARACTER_CACHE_FIELDS_DO 5073 5074 jchar java_lang_Character::value(oop obj) { 5075 jvalue v; 5076 java_lang_boxing_object::get_value(obj, &v); 5077 return v.c; 5078 } 5079 5080 #define SHORT_CACHE_FIELDS_DO(macro) \ 5081 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true) 5082 5083 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) { 5084 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5085 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5086 } 5087 5088 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) { 5089 oop base = ik->static_field_base_raw(); 5090 return objArrayOop(base->obj_field(_static_cache_offset)); 5091 } 5092 5093 Symbol* java_lang_Short_ShortCache::symbol() { 5094 return vmSymbols::java_lang_Short_ShortCache(); 5095 } 5096 5097 #if INCLUDE_CDS 5098 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) { 5099 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5100 } 5101 #endif 5102 #undef SHORT_CACHE_FIELDS_DO 5103 5104 jshort java_lang_Short::value(oop obj) { 5105 jvalue v; 5106 java_lang_boxing_object::get_value(obj, &v); 5107 return v.s; 5108 } 5109 5110 #define BYTE_CACHE_FIELDS_DO(macro) \ 5111 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true) 5112 5113 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) { 5114 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5115 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5116 } 5117 5118 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) { 5119 oop base = ik->static_field_base_raw(); 5120 return objArrayOop(base->obj_field(_static_cache_offset)); 5121 } 5122 5123 Symbol* java_lang_Byte_ByteCache::symbol() { 5124 return vmSymbols::java_lang_Byte_ByteCache(); 5125 } 5126 5127 #if INCLUDE_CDS 5128 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) { 5129 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5130 } 5131 #endif 5132 #undef BYTE_CACHE_FIELDS_DO 5133 5134 jbyte java_lang_Byte::value(oop obj) { 5135 jvalue v; 5136 java_lang_boxing_object::get_value(obj, &v); 5137 return v.b; 5138 } 5139 5140 int java_lang_Boolean::_static_TRUE_offset; 5141 int java_lang_Boolean::_static_FALSE_offset; 5142 5143 #define BOOLEAN_FIELDS_DO(macro) \ 5144 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \ 5145 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true) 5146 5147 5148 void java_lang_Boolean::compute_offsets(InstanceKlass *k) { 5149 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5150 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5151 } 5152 5153 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) { 5154 oop base = ik->static_field_base_raw(); 5155 return base->obj_field(_static_TRUE_offset); 5156 } 5157 5158 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) { 5159 oop base = ik->static_field_base_raw(); 5160 return base->obj_field(_static_FALSE_offset); 5161 } 5162 5163 Symbol* java_lang_Boolean::symbol() { 5164 return vmSymbols::java_lang_Boolean(); 5165 } 5166 5167 #if INCLUDE_CDS 5168 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) { 5169 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5170 } 5171 #endif 5172 #undef BOOLEAN_CACHE_FIELDS_DO 5173 5174 jboolean java_lang_Boolean::value(oop obj) { 5175 jvalue v; 5176 java_lang_boxing_object::get_value(obj, &v); 5177 return v.z; 5178 } 5179 5180 // java_lang_reflect_RecordComponent 5181 5182 int java_lang_reflect_RecordComponent::_clazz_offset; 5183 int java_lang_reflect_RecordComponent::_name_offset; 5184 int java_lang_reflect_RecordComponent::_type_offset; 5185 int java_lang_reflect_RecordComponent::_accessor_offset; 5186 int java_lang_reflect_RecordComponent::_signature_offset; 5187 int java_lang_reflect_RecordComponent::_annotations_offset; 5188 int java_lang_reflect_RecordComponent::_typeAnnotations_offset; 5189 5190 #define RECORDCOMPONENT_FIELDS_DO(macro) \ 5191 macro(_clazz_offset, k, "clazz", class_signature, false); \ 5192 macro(_name_offset, k, "name", string_signature, false); \ 5193 macro(_type_offset, k, "type", class_signature, false); \ 5194 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \ 5195 macro(_signature_offset, k, "signature", string_signature, false); \ 5196 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \ 5197 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false); 5198 5199 // Support for java_lang_reflect_RecordComponent 5200 void java_lang_reflect_RecordComponent::compute_offsets() { 5201 InstanceKlass* k = vmClasses::RecordComponent_klass(); 5202 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5203 } 5204 5205 #if INCLUDE_CDS 5206 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) { 5207 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5208 } 5209 #endif 5210 5211 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) { 5212 element->obj_field_put(_clazz_offset, value); 5213 } 5214 5215 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) { 5216 element->obj_field_put(_name_offset, value); 5217 } 5218 5219 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) { 5220 element->obj_field_put(_type_offset, value); 5221 } 5222 5223 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) { 5224 element->obj_field_put(_accessor_offset, value); 5225 } 5226 5227 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) { 5228 element->obj_field_put(_signature_offset, value); 5229 } 5230 5231 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) { 5232 element->obj_field_put(_annotations_offset, value); 5233 } 5234 5235 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) { 5236 element->obj_field_put(_typeAnnotations_offset, value); 5237 } 5238 5239 // java_lang_InternalError 5240 int java_lang_InternalError::_during_unsafe_access_offset; 5241 5242 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) { 5243 internal_error->bool_field_put(_during_unsafe_access_offset, true); 5244 } 5245 5246 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) { 5247 return internal_error->bool_field(_during_unsafe_access_offset); 5248 } 5249 5250 void java_lang_InternalError::compute_offsets() { 5251 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 5252 } 5253 5254 #if INCLUDE_CDS 5255 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) { 5256 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 5257 } 5258 #endif 5259 5260 #define BASIC_JAVA_CLASSES_DO_PART1(f) \ 5261 f(java_lang_Class) \ 5262 f(java_lang_String) \ 5263 f(java_lang_ref_Reference) \ 5264 //end 5265 5266 #define BASIC_JAVA_CLASSES_DO_PART2(f) \ 5267 f(java_lang_System) \ 5268 f(java_lang_ClassLoader) \ 5269 f(java_lang_Throwable) \ 5270 f(java_lang_Thread) \ 5271 f(java_lang_Thread_FieldHolder) \ 5272 f(java_lang_Thread_Constants) \ 5273 f(java_lang_ThreadGroup) \ 5274 f(java_lang_VirtualThread) \ 5275 f(java_lang_InternalError) \ 5276 f(java_lang_AssertionStatusDirectives) \ 5277 f(java_lang_ref_SoftReference) \ 5278 f(java_lang_invoke_MethodHandle) \ 5279 f(java_lang_invoke_DirectMethodHandle) \ 5280 f(java_lang_invoke_MemberName) \ 5281 f(java_lang_invoke_ResolvedMethodName) \ 5282 f(java_lang_invoke_LambdaForm) \ 5283 f(java_lang_invoke_MethodType) \ 5284 f(java_lang_invoke_CallSite) \ 5285 f(java_lang_invoke_ConstantCallSite) \ 5286 f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \ 5287 f(java_security_AccessControlContext) \ 5288 f(java_lang_reflect_AccessibleObject) \ 5289 f(java_lang_reflect_Method) \ 5290 f(java_lang_reflect_Constructor) \ 5291 f(java_lang_reflect_Field) \ 5292 f(java_lang_reflect_RecordComponent) \ 5293 f(reflect_ConstantPool) \ 5294 f(java_lang_reflect_Parameter) \ 5295 f(java_lang_Module) \ 5296 f(java_lang_StackTraceElement) \ 5297 f(java_lang_ClassFrameInfo) \ 5298 f(java_lang_StackFrameInfo) \ 5299 f(java_lang_LiveStackFrameInfo) \ 5300 f(jdk_internal_vm_ContinuationScope) \ 5301 f(jdk_internal_vm_Continuation) \ 5302 f(jdk_internal_vm_StackChunk) \ 5303 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \ 5304 f(jdk_internal_foreign_abi_NativeEntryPoint) \ 5305 f(jdk_internal_foreign_abi_ABIDescriptor) \ 5306 f(jdk_internal_foreign_abi_VMStorage) \ 5307 f(jdk_internal_foreign_abi_CallConv) \ 5308 f(jdk_internal_misc_UnsafeConstants) \ 5309 f(java_lang_boxing_object) \ 5310 f(vector_VectorPayload) \ 5311 //end 5312 5313 #define BASIC_JAVA_CLASSES_DO(f) \ 5314 BASIC_JAVA_CLASSES_DO_PART1(f) \ 5315 BASIC_JAVA_CLASSES_DO_PART2(f) 5316 5317 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets(); 5318 5319 // Compute field offsets of all the classes in this file 5320 void JavaClasses::compute_offsets() { 5321 if (UseSharedSpaces) { 5322 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() && 5323 JvmtiExport::has_early_class_hook_env()), 5324 "JavaClasses::compute_offsets() must be called in early JVMTI phase.")); 5325 // None of the classes used by the rest of this function can be replaced by 5326 // JVMTI ClassFileLoadHook. 5327 // We are safe to use the archived offsets, which have already been restored 5328 // by JavaClasses::serialize_offsets, without computing the offsets again. 5329 return; 5330 } 5331 5332 // We have already called the compute_offsets() of the 5333 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and 5334 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all() 5335 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS); 5336 } 5337 5338 #if INCLUDE_CDS 5339 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc); 5340 5341 void JavaClasses::serialize_offsets(SerializeClosure* soc) { 5342 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS); 5343 } 5344 #endif 5345 5346 #if INCLUDE_CDS_JAVA_HEAP 5347 bool JavaClasses::is_supported_for_archiving(oop obj) { 5348 Klass* klass = obj->klass(); 5349 5350 if (klass == vmClasses::ClassLoader_klass() || // ClassLoader::loader_data is malloc'ed. 5351 // The next 3 classes are used to implement java.lang.invoke, and are not used directly in 5352 // regular Java code. The implementation of java.lang.invoke uses generated hidden classes 5353 // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS. 5354 // So for now we cannot not support these classes for archiving. 5355 // 5356 // These objects typically are not referenced by static fields, but rather by resolved 5357 // constant pool entries, so excluding them shouldn't affect the archiving of static fields. 5358 klass == vmClasses::ResolvedMethodName_klass() || 5359 klass == vmClasses::MemberName_klass() || 5360 klass == vmClasses::Context_klass() || 5361 // It's problematic to archive Reference objects. One of the reasons is that 5362 // Reference::discovered may pull in unwanted objects (see JDK-8284336) 5363 klass->is_subclass_of(vmClasses::Reference_klass())) { 5364 return false; 5365 } 5366 5367 return true; 5368 } 5369 #endif 5370 5371 #ifndef PRODUCT 5372 5373 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check. 5374 5375 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name, 5376 const char* field_sig) { 5377 EXCEPTION_MARK; 5378 fieldDescriptor fd; 5379 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name); 5380 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 5381 InstanceKlass* ik = InstanceKlass::cast(k); 5382 TempNewSymbol f_name = SymbolTable::new_symbol(field_name); 5383 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig); 5384 if (!ik->find_local_field(f_name, f_sig, &fd)) { 5385 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 5386 return false; 5387 } 5388 if (fd.is_static()) { 5389 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 5390 return false; 5391 } 5392 if (fd.offset() == deserialized_offset ) { 5393 return true; 5394 } else { 5395 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.", 5396 klass_name, field_name, deserialized_offset, fd.offset()); 5397 return false; 5398 } 5399 } 5400 5401 void JavaClasses::check_offsets() { 5402 bool valid = true; 5403 5404 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 5405 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig) 5406 5407 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 5408 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig) 5409 5410 // Boxed primitive objects (java_lang_boxing_object) 5411 5412 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 5413 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 5414 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 5415 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 5416 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 5417 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 5418 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 5419 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 5420 5421 if (!valid) vm_exit_during_initialization("Field offset verification failed"); 5422 } 5423 5424 #endif // PRODUCT 5425 5426 int InjectedField::compute_offset() { 5427 InstanceKlass* ik = InstanceKlass::cast(klass()); 5428 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 5429 if (!may_be_java && !fs.field_flags().is_injected()) { 5430 // Only look at injected fields 5431 continue; 5432 } 5433 if (fs.name() == name() && fs.signature() == signature()) { 5434 return fs.offset(); 5435 } 5436 } 5437 ResourceMark rm; 5438 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)" : ""); 5439 #ifndef PRODUCT 5440 ik->print(); 5441 tty->print_cr("all fields:"); 5442 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 5443 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 5444 } 5445 #endif //PRODUCT 5446 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 5447 return -1; 5448 } 5449 5450 void javaClasses_init() { 5451 JavaClasses::compute_offsets(); 5452 JavaClasses::check_offsets(); 5453 FilteredFieldsMap::initialize(); // must be done after computing offsets. 5454 }