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/cdsConfig.hpp" 29 #include "cds/heapShared.hpp" 30 #include "cds/metaspaceShared.hpp" 31 #include "classfile/altHashing.hpp" 32 #include "classfile/classLoaderData.inline.hpp" 33 #include "classfile/javaClasses.inline.hpp" 34 #include "classfile/javaClassesImpl.hpp" 35 #include "classfile/javaThreadStatus.hpp" 36 #include "classfile/moduleEntry.hpp" 37 #include "classfile/stringTable.hpp" 38 #include "classfile/symbolTable.hpp" 39 #include "classfile/systemDictionary.hpp" 40 #include "classfile/vmClasses.hpp" 41 #include "classfile/vmSymbols.hpp" 42 #include "code/debugInfo.hpp" 43 #include "code/dependencyContext.hpp" 44 #include "code/pcDesc.hpp" 45 #include "gc/shared/collectedHeap.inline.hpp" 46 #include "interpreter/interpreter.hpp" 47 #include "interpreter/linkResolver.hpp" 48 #include "jvm.h" 49 #include "logging/log.hpp" 50 #include "logging/logStream.hpp" 51 #include "memory/oopFactory.hpp" 52 #include "memory/resourceArea.hpp" 53 #include "memory/universe.hpp" 54 #include "oops/fieldInfo.hpp" 55 #include "oops/fieldStreams.inline.hpp" 56 #include "oops/instanceKlass.inline.hpp" 57 #include "oops/instanceMirrorKlass.hpp" 58 #include "oops/klass.hpp" 59 #include "oops/klass.inline.hpp" 60 #include "oops/method.inline.hpp" 61 #include "oops/objArrayKlass.hpp" 62 #include "oops/objArrayOop.inline.hpp" 63 #include "oops/oopCast.inline.hpp" 64 #include "oops/oop.inline.hpp" 65 #include "oops/symbol.hpp" 66 #include "oops/recordComponent.hpp" 67 #include "oops/typeArrayOop.inline.hpp" 68 #include "prims/jvmtiExport.hpp" 69 #include "prims/methodHandles.hpp" 70 #include "prims/resolvedMethodTable.hpp" 71 #include "runtime/continuationEntry.inline.hpp" 72 #include "runtime/continuationJavaClasses.inline.hpp" 73 #include "runtime/fieldDescriptor.inline.hpp" 74 #include "runtime/frame.inline.hpp" 75 #include "runtime/handles.inline.hpp" 76 #include "runtime/handshake.hpp" 77 #include "runtime/init.hpp" 78 #include "runtime/interfaceSupport.inline.hpp" 79 #include "runtime/java.hpp" 80 #include "runtime/javaCalls.hpp" 81 #include "runtime/javaThread.hpp" 82 #include "runtime/jniHandles.inline.hpp" 83 #include "runtime/reflectionUtils.hpp" 84 #include "runtime/safepoint.hpp" 85 #include "runtime/safepointVerifiers.hpp" 86 #include "runtime/threadSMR.hpp" 87 #include "runtime/vframe.inline.hpp" 88 #include "runtime/vm_version.hpp" 89 #include "utilities/align.hpp" 90 #include "utilities/globalDefinitions.hpp" 91 #include "utilities/growableArray.hpp" 92 #include "utilities/preserveException.hpp" 93 #include "utilities/utf8.hpp" 94 #if INCLUDE_JVMCI 95 #include "jvmci/jvmciJavaClasses.hpp" 96 #endif 97 98 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 99 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 100 101 InjectedField JavaClasses::_injected_fields[] = { 102 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 103 }; 104 105 // Register native methods of Object 106 void java_lang_Object::register_natives(TRAPS) { 107 InstanceKlass* obj = vmClasses::Object_klass(); 108 Method::register_native(obj, vmSymbols::hashCode_name(), 109 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK); 110 Method::register_native(obj, vmSymbols::wait_name(), 111 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK); 112 Method::register_native(obj, vmSymbols::notify_name(), 113 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK); 114 Method::register_native(obj, vmSymbols::notifyAll_name(), 115 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK); 116 Method::register_native(obj, vmSymbols::clone_name(), 117 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD); 118 } 119 120 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 121 return _injected_fields[(int)id].compute_offset(); 122 } 123 124 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 125 *field_count = 0; 126 127 vmSymbolID sid = vmSymbols::find_sid(class_name); 128 if (sid == vmSymbolID::NO_SID) { 129 // Only well known classes can inject fields 130 return nullptr; 131 } 132 133 int count = 0; 134 int start = -1; 135 136 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 137 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \ 138 count++; \ 139 if (start == -1) { \ 140 start = (int)InjectedFieldID::klass##_##name##_enum; \ 141 } \ 142 } 143 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 144 #undef LOOKUP_INJECTED_FIELD 145 146 if (start != -1) { 147 *field_count = count; 148 return _injected_fields + start; 149 } 150 return nullptr; 151 } 152 153 154 // Helpful routine for computing field offsets at run time rather than hardcoding them 155 // Finds local fields only, including static fields. Static field offsets are from the 156 // beginning of the mirror. 157 void JavaClasses::compute_offset(int &dest_offset, 158 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol, 159 bool is_static) { 160 fieldDescriptor fd; 161 if (ik == nullptr) { 162 ResourceMark rm; 163 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string()); 164 vm_exit_during_initialization("Invalid layout of well-known class"); 165 } 166 167 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) { 168 ResourceMark rm; 169 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(), 170 name_symbol->as_C_string(), signature_symbol->as_C_string()); 171 #ifndef PRODUCT 172 // Prints all fields and offsets 173 Log(class) lt; 174 LogStream ls(lt.error()); 175 ik->print_on(&ls); 176 #endif //PRODUCT 177 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 178 } 179 dest_offset = fd.offset(); 180 } 181 182 // Overloading to pass name as a string. 183 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik, 184 const char* name_string, Symbol* signature_symbol, 185 bool is_static) { 186 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string)); 187 if (name == nullptr) { 188 ResourceMark rm; 189 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string); 190 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name()); 191 } 192 compute_offset(dest_offset, ik, name, signature_symbol, is_static); 193 } 194 195 // java_lang_String 196 197 int java_lang_String::_value_offset; 198 int java_lang_String::_hash_offset; 199 int java_lang_String::_hashIsZero_offset; 200 int java_lang_String::_coder_offset; 201 int java_lang_String::_flags_offset; 202 203 bool java_lang_String::_initialized; 204 205 206 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) { 207 uint8_t* addr = flags_addr(java_string); 208 uint8_t value = Atomic::load(addr); 209 while ((value & flag_mask) == 0) { 210 uint8_t old_value = value; 211 value |= flag_mask; 212 value = Atomic::cmpxchg(addr, old_value, value); 213 if (value == old_value) return false; // Flag bit changed from 0 to 1. 214 } 215 return true; // Flag bit is already 1. 216 } 217 218 #define STRING_FIELDS_DO(macro) \ 219 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \ 220 macro(_hash_offset, k, "hash", int_signature, false); \ 221 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \ 222 macro(_coder_offset, k, "coder", byte_signature, false); 223 224 void java_lang_String::compute_offsets() { 225 if (_initialized) { 226 return; 227 } 228 229 InstanceKlass* k = vmClasses::String_klass(); 230 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 231 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 232 233 _initialized = true; 234 } 235 236 #if INCLUDE_CDS 237 void java_lang_String::serialize_offsets(SerializeClosure* f) { 238 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 239 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 240 f->do_bool(&_initialized); 241 } 242 #endif 243 244 class CompactStringsFixup : public FieldClosure { 245 private: 246 bool _value; 247 248 public: 249 CompactStringsFixup(bool value) : _value(value) {} 250 251 void do_field(fieldDescriptor* fd) { 252 if (fd->name() == vmSymbols::compact_strings_name()) { 253 oop mirror = fd->field_holder()->java_mirror(); 254 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String"); 255 assert(mirror != nullptr, "String must have mirror already"); 256 mirror->bool_field_put(fd->offset(), _value); 257 } 258 } 259 }; 260 261 void java_lang_String::set_compact_strings(bool value) { 262 CompactStringsFixup fix(value); 263 vmClasses::String_klass()->do_local_static_fields(&fix); 264 } 265 266 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 267 assert(_initialized, "Must be initialized"); 268 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 269 270 // Create the String object first, so there's a chance that the String 271 // and the char array it points to end up in the same cache line. 272 oop obj; 273 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH); 274 275 // Create the char array. The String object must be handlized here 276 // because GC can happen as a result of the allocation attempt. 277 Handle h_obj(THREAD, obj); 278 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 279 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 280 281 // Point the String at the char array 282 obj = h_obj(); 283 set_value(obj, buffer); 284 // No need to zero the offset, allocation zero'ed the entire String object 285 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 286 return h_obj; 287 } 288 289 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) { 290 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 291 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 292 typeArrayOop buffer = value(h_obj()); 293 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 294 if (is_latin1) { 295 for (int index = 0; index < length; index++) { 296 buffer->byte_at_put(index, (jbyte)unicode[index]); 297 } 298 } else { 299 for (int index = 0; index < length; index++) { 300 buffer->char_at_put(index, unicode[index]); 301 } 302 } 303 304 #ifdef ASSERT 305 { 306 ResourceMark rm; 307 char* expected = UNICODE::as_utf8(unicode, length); 308 char* actual = as_utf8_string(h_obj()); 309 if (strcmp(expected, actual) != 0) { 310 fatal("Unicode conversion failure: %s --> %s", expected, actual); 311 } 312 } 313 #endif 314 315 return h_obj; 316 } 317 318 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) { 319 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL); 320 return h_obj(); 321 } 322 323 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 324 if (utf8_str == nullptr) { 325 return Handle(); 326 } 327 bool has_multibyte, is_latin1; 328 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 329 if (!CompactStrings) { 330 has_multibyte = true; 331 is_latin1 = false; 332 } 333 334 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 335 if (length > 0) { 336 if (!has_multibyte) { 337 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 338 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 339 } else if (is_latin1) { 340 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 341 } else { 342 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 343 } 344 } 345 346 #ifdef ASSERT 347 // This check is too strict when the input string is not a valid UTF8. 348 // For example, it may be created with arbitrary content via jni_NewStringUTF. 349 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, (int)strlen(utf8_str), false)) { 350 ResourceMark rm; 351 const char* expected = utf8_str; 352 char* actual = as_utf8_string(h_obj()); 353 if (strcmp(expected, actual) != 0) { 354 fatal("String conversion failure: %s --> %s", expected, actual); 355 } 356 } 357 #endif 358 359 return h_obj; 360 } 361 362 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 363 Handle h_obj = create_from_str(utf8_str, CHECK_NULL); 364 return h_obj(); 365 } 366 367 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 368 const char* utf8_str = (char*)symbol->bytes(); 369 int utf8_len = symbol->utf8_length(); 370 371 bool has_multibyte, is_latin1; 372 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 373 if (!CompactStrings) { 374 has_multibyte = true; 375 is_latin1 = false; 376 } 377 378 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 379 if (length > 0) { 380 if (!has_multibyte) { 381 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 382 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 383 } else if (is_latin1) { 384 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 385 } else { 386 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 387 } 388 } 389 390 #ifdef ASSERT 391 { 392 ResourceMark rm; 393 const char* expected = symbol->as_utf8(); 394 char* actual = as_utf8_string(h_obj()); 395 if (strncmp(expected, actual, utf8_len) != 0) { 396 fatal("Symbol conversion failure: %s --> %s", expected, actual); 397 } 398 } 399 #endif 400 401 return h_obj; 402 } 403 404 // Converts a C string to a Java String based on current encoding 405 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 406 assert(str != nullptr, "bad arguments"); 407 408 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *); 409 static to_java_string_fn_t _to_java_string_fn = nullptr; 410 411 if (_to_java_string_fn == nullptr) { 412 void *lib_handle = os::native_java_library(); 413 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform")); 414 #if defined(_WIN32) && !defined(_WIN64) 415 if (_to_java_string_fn == nullptr) { 416 // On 32 bit Windows, also try __stdcall decorated name 417 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8")); 418 } 419 #endif 420 if (_to_java_string_fn == nullptr) { 421 fatal("JNU_NewStringPlatform missing"); 422 } 423 } 424 425 jstring js = nullptr; 426 { 427 JavaThread* thread = THREAD; 428 HandleMark hm(thread); 429 ThreadToNativeFromVM ttn(thread); 430 js = (_to_java_string_fn)(thread->jni_environment(), str); 431 } 432 433 Handle native_platform_string(THREAD, JNIHandles::resolve(js)); 434 JNIHandles::destroy_local(js); // destroy local JNIHandle. 435 return native_platform_string; 436 } 437 438 // Converts a Java String to a native C string that can be used for 439 // native OS calls. 440 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 441 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 442 static to_platform_string_fn_t _to_platform_string_fn = nullptr; 443 444 if (_to_platform_string_fn == nullptr) { 445 void *lib_handle = os::native_java_library(); 446 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 447 if (_to_platform_string_fn == nullptr) { 448 fatal("GetStringPlatformChars missing"); 449 } 450 } 451 452 char *native_platform_string; 453 jstring js; 454 { JavaThread* thread = THREAD; 455 js = (jstring) JNIHandles::make_local(thread, java_string()); 456 HandleMark hm(thread); 457 ThreadToNativeFromVM ttn(thread); 458 JNIEnv *env = thread->jni_environment(); 459 bool is_copy; 460 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 461 assert(is_copy == JNI_TRUE, "is_copy value changed"); 462 } 463 464 // Uses a store barrier and therefore needs to be in vm state 465 JNIHandles::destroy_local(js); 466 467 return native_platform_string; 468 } 469 470 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) { 471 ResourceMark rm(THREAD); 472 return create_from_str(java_name->as_klass_external_name(), THREAD); 473 } 474 475 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 476 jchar* result = as_unicode_string_or_null(java_string, length); 477 if (result == nullptr) { 478 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 479 } 480 return result; 481 } 482 483 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) { 484 typeArrayOop value = java_lang_String::value(java_string); 485 length = java_lang_String::length(java_string, value); 486 bool is_latin1 = java_lang_String::is_latin1(java_string); 487 488 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 489 if (result != nullptr) { 490 if (!is_latin1) { 491 for (int index = 0; index < length; index++) { 492 result[index] = value->char_at(index); 493 } 494 } else { 495 for (int index = 0; index < length; index++) { 496 result[index] = ((jchar) value->byte_at(index)) & 0xff; 497 } 498 } 499 } 500 return result; 501 } 502 503 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) { 504 // The hash and hashIsZero fields are subject to a benign data race, 505 // making it crucial to ensure that any observable result of the 506 // calculation in this method stays correct under any possible read of 507 // these fields. Necessary restrictions to allow this to be correct 508 // without explicit memory fences or similar concurrency primitives is 509 // that we can ever only write to one of these two fields for a given 510 // String instance, and that the computation is idempotent and derived 511 // from immutable state 512 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized"); 513 if (java_lang_String::hash_is_set(java_string)) { 514 return java_string->int_field(_hash_offset); 515 } 516 517 typeArrayOop value = java_lang_String::value(java_string); 518 int length = java_lang_String::length(java_string, value); 519 bool is_latin1 = java_lang_String::is_latin1(java_string); 520 521 unsigned int hash = 0; 522 if (length > 0) { 523 if (is_latin1) { 524 hash = java_lang_String::hash_code(value->byte_at_addr(0), length); 525 } else { 526 hash = java_lang_String::hash_code(value->char_at_addr(0), length); 527 } 528 } 529 530 if (update) { 531 if (hash != 0) { 532 java_string->int_field_put(_hash_offset, hash); 533 } else { 534 java_string->bool_field_put(_hashIsZero_offset, true); 535 } 536 } 537 return hash; 538 } 539 540 unsigned int java_lang_String::hash_code(oop java_string) { 541 return hash_code_impl(java_string, /*update=*/true); 542 } 543 544 unsigned int java_lang_String::hash_code_noupdate(oop java_string) { 545 return hash_code_impl(java_string, /*update=*/false); 546 } 547 548 549 char* java_lang_String::as_quoted_ascii(oop java_string) { 550 typeArrayOop value = java_lang_String::value(java_string); 551 int length = java_lang_String::length(java_string, value); 552 bool is_latin1 = java_lang_String::is_latin1(java_string); 553 554 if (length == 0) return nullptr; 555 556 char* result; 557 int result_length; 558 if (!is_latin1) { 559 jchar* base = value->char_at_addr(0); 560 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 561 result = NEW_RESOURCE_ARRAY(char, result_length); 562 UNICODE::as_quoted_ascii(base, length, result, result_length); 563 } else { 564 jbyte* base = value->byte_at_addr(0); 565 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 566 result = NEW_RESOURCE_ARRAY(char, result_length); 567 UNICODE::as_quoted_ascii(base, length, result, result_length); 568 } 569 assert(result_length >= length + 1, "must not be shorter"); 570 assert(result_length == (int)strlen(result) + 1, "must match"); 571 return result; 572 } 573 574 Symbol* java_lang_String::as_symbol(oop java_string) { 575 typeArrayOop value = java_lang_String::value(java_string); 576 int length = java_lang_String::length(java_string, value); 577 bool is_latin1 = java_lang_String::is_latin1(java_string); 578 if (!is_latin1) { 579 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0); 580 Symbol* sym = SymbolTable::new_symbol(base, length); 581 return sym; 582 } else { 583 ResourceMark rm; 584 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 585 const char* base = UNICODE::as_utf8(position, length); 586 Symbol* sym = SymbolTable::new_symbol(base, length); 587 return sym; 588 } 589 } 590 591 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 592 typeArrayOop value = java_lang_String::value(java_string); 593 int length = java_lang_String::length(java_string, value); 594 bool is_latin1 = java_lang_String::is_latin1(java_string); 595 if (!is_latin1) { 596 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0); 597 return SymbolTable::probe_unicode(base, length); 598 } else { 599 ResourceMark rm; 600 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 601 const char* base = UNICODE::as_utf8(position, length); 602 return SymbolTable::probe(base, length); 603 } 604 } 605 606 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) { 607 assert(value_equals(value, java_lang_String::value(java_string)), 608 "value must be same as java_lang_String::value(java_string)"); 609 int length = java_lang_String::length(java_string, value); 610 if (length == 0) { 611 return 0; 612 } 613 if (!java_lang_String::is_latin1(java_string)) { 614 return UNICODE::utf8_length(value->char_at_addr(0), length); 615 } else { 616 return UNICODE::utf8_length(value->byte_at_addr(0), length); 617 } 618 } 619 620 int java_lang_String::utf8_length(oop java_string) { 621 typeArrayOop value = java_lang_String::value(java_string); 622 return utf8_length(java_string, value); 623 } 624 625 char* java_lang_String::as_utf8_string(oop java_string) { 626 int length; 627 return as_utf8_string(java_string, length); 628 } 629 630 char* java_lang_String::as_utf8_string(oop java_string, int& length) { 631 typeArrayOop value = java_lang_String::value(java_string); 632 length = java_lang_String::length(java_string, value); 633 bool is_latin1 = java_lang_String::is_latin1(java_string); 634 if (!is_latin1) { 635 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0); 636 return UNICODE::as_utf8(position, length); 637 } else { 638 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 639 return UNICODE::as_utf8(position, length); 640 } 641 } 642 643 // Uses a provided buffer if it's sufficiently large, otherwise allocates 644 // a resource array to fit 645 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, int buflen, int& utf8_len) { 646 typeArrayOop value = java_lang_String::value(java_string); 647 int len = java_lang_String::length(java_string, value); 648 bool is_latin1 = java_lang_String::is_latin1(java_string); 649 if (!is_latin1) { 650 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0); 651 utf8_len = UNICODE::utf8_length(position, len); 652 if (utf8_len >= buflen) { 653 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 654 } 655 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 656 } else { 657 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0); 658 utf8_len = UNICODE::utf8_length(position, len); 659 if (utf8_len >= buflen) { 660 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 661 } 662 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 663 } 664 } 665 666 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) { 667 assert(value_equals(value, java_lang_String::value(java_string)), 668 "value must be same as java_lang_String::value(java_string)"); 669 int length = java_lang_String::length(java_string, value); 670 bool is_latin1 = java_lang_String::is_latin1(java_string); 671 if (!is_latin1) { 672 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0); 673 return UNICODE::as_utf8(position, length, buf, buflen); 674 } else { 675 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 676 return UNICODE::as_utf8(position, length, buf, buflen); 677 } 678 } 679 680 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 681 typeArrayOop value = java_lang_String::value(java_string); 682 return as_utf8_string(java_string, value, buf, buflen); 683 } 684 685 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 686 typeArrayOop value = java_lang_String::value(java_string); 687 bool is_latin1 = java_lang_String::is_latin1(java_string); 688 assert(start + len <= java_lang_String::length(java_string), "just checking"); 689 if (!is_latin1) { 690 jchar* position = value->char_at_addr(start); 691 return UNICODE::as_utf8(position, len); 692 } else { 693 jbyte* position = value->byte_at_addr(start); 694 return UNICODE::as_utf8(position, len); 695 } 696 } 697 698 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) { 699 assert(value_equals(value, java_lang_String::value(java_string)), 700 "value must be same as java_lang_String::value(java_string)"); 701 assert(start + len <= java_lang_String::length(java_string), "just checking"); 702 bool is_latin1 = java_lang_String::is_latin1(java_string); 703 if (!is_latin1) { 704 jchar* position = value->char_at_addr(start); 705 return UNICODE::as_utf8(position, len, buf, buflen); 706 } else { 707 jbyte* position = value->byte_at_addr(start); 708 return UNICODE::as_utf8(position, len, buf, buflen); 709 } 710 } 711 712 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) { 713 assert(java_string->klass() == vmClasses::String_klass(), 714 "must be java_string"); 715 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 716 int length = java_lang_String::length(java_string, value); 717 if (length != len) { 718 return false; 719 } 720 bool is_latin1 = java_lang_String::is_latin1(java_string); 721 if (!is_latin1) { 722 for (int i = 0; i < len; i++) { 723 if (value->char_at(i) != chars[i]) { 724 return false; 725 } 726 } 727 } else { 728 for (int i = 0; i < len; i++) { 729 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 730 return false; 731 } 732 } 733 } 734 return true; 735 } 736 737 bool java_lang_String::equals(oop str1, oop str2) { 738 assert(str1->klass() == vmClasses::String_klass(), 739 "must be java String"); 740 assert(str2->klass() == vmClasses::String_klass(), 741 "must be java String"); 742 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1); 743 bool is_latin1 = java_lang_String::is_latin1(str1); 744 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2); 745 bool is_latin2 = java_lang_String::is_latin1(str2); 746 747 if (is_latin1 != is_latin2) { 748 // Strings with different coders are never equal. 749 return false; 750 } 751 return value_equals(value1, value2); 752 } 753 754 void java_lang_String::print(oop java_string, outputStream* st) { 755 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string"); 756 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 757 758 if (value == nullptr) { 759 // This can happen if, e.g., printing a String 760 // object before its initializer has been called 761 st->print("nullptr"); 762 return; 763 } 764 765 int length = java_lang_String::length(java_string, value); 766 bool is_latin1 = java_lang_String::is_latin1(java_string); 767 768 st->print("\""); 769 for (int index = 0; index < length; index++) { 770 jchar c = (!is_latin1) ? value->char_at(index) : 771 ((jchar) value->byte_at(index)) & 0xff; 772 if (c < ' ') { 773 st->print("\\x%02X", c); // print control characters e.g. \x0A 774 } else { 775 st->print("%c", c); 776 } 777 } 778 st->print("\""); 779 } 780 781 // java_lang_Class 782 783 int java_lang_Class::_klass_offset; 784 int java_lang_Class::_array_klass_offset; 785 int java_lang_Class::_oop_size_offset; 786 int java_lang_Class::_static_oop_field_count_offset; 787 int java_lang_Class::_class_loader_offset; 788 int java_lang_Class::_module_offset; 789 int java_lang_Class::_protection_domain_offset; 790 int java_lang_Class::_component_mirror_offset; 791 int java_lang_Class::_signers_offset; 792 int java_lang_Class::_name_offset; 793 int java_lang_Class::_source_file_offset; 794 int java_lang_Class::_classData_offset; 795 int java_lang_Class::_classRedefinedCount_offset; 796 797 bool java_lang_Class::_offsets_computed = false; 798 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr; 799 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr; 800 801 #ifdef ASSERT 802 inline static void assert_valid_static_string_field(fieldDescriptor* fd) { 803 assert(fd->has_initial_value(), "caller should have checked this"); 804 assert(fd->field_type() == T_OBJECT, "caller should have checked this"); 805 assert(fd->signature() == vmSymbols::string_signature(), "just checking"); 806 } 807 #endif 808 809 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 810 DEBUG_ONLY(assert_valid_static_string_field(fd);) 811 oop string = fd->string_initial_value(CHECK); 812 mirror()->obj_field_put(fd->offset(), string); 813 } 814 815 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) { 816 assert(fd->has_initial_value(), "caller should have checked this"); 817 BasicType t = fd->field_type(); 818 switch (t) { 819 case T_BYTE: 820 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value())); 821 break; 822 case T_BOOLEAN: 823 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value())); 824 break; 825 case T_CHAR: 826 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value())); 827 break; 828 case T_SHORT: 829 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value())); 830 break; 831 case T_INT: 832 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 833 break; 834 case T_FLOAT: 835 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 836 break; 837 case T_DOUBLE: 838 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 839 break; 840 case T_LONG: 841 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 842 break; 843 default: 844 // Illegal ConstantValue attribute in class file should have been 845 // caught during classfile parsing. 846 ShouldNotReachHere(); 847 } 848 } 849 850 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 851 assert(mirror.not_null() && fd->is_static(), "just checking"); 852 if (fd->has_initial_value()) { 853 if (fd->field_type() != T_OBJECT) { 854 initialize_static_primitive_field(fd, mirror); 855 } else { 856 initialize_static_string_field(fd, mirror, CHECK); 857 } 858 } 859 } 860 861 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 862 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 863 864 // If the offset was read from the shared archive, it was fixed up already 865 if (!k->is_shared()) { 866 if (k->is_instance_klass()) { 867 // During bootstrap, java.lang.Class wasn't loaded so static field 868 // offsets were computed without the size added it. Go back and 869 // update all the static field offsets to included the size. 870 871 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow 872 // content updates. So the FieldInfo stream has to be decompressed into a temporary array, 873 // static fields offsets are updated in this array before reencoding everything into 874 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream. 875 876 int java_fields; 877 int injected_fields; 878 InstanceKlass* ik = InstanceKlass::cast(k); 879 GrowableArray<FieldInfo>* fields = 880 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(), 881 &java_fields, &injected_fields); 882 for (int i = 0; i < fields->length(); i++) { 883 FieldInfo* fi = fields->adr_at(i); 884 if (fi->access_flags().is_static()) { 885 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields()); 886 } 887 } 888 Array<u1>* old_stream = ik->fieldinfo_stream(); 889 assert(fields->length() == (java_fields + injected_fields), "Must be"); 890 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK); 891 ik->set_fieldinfo_stream(new_fis); 892 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream); 893 } 894 } 895 896 if (k->is_shared() && k->has_archived_mirror_index()) { 897 if (ArchiveHeapLoader::is_in_use()) { 898 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK); 899 assert(present, "Missing archived mirror for %s", k->external_name()); 900 return; 901 } else { 902 k->clear_java_mirror_handle(); 903 k->clear_archived_mirror_index(); 904 } 905 } 906 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK); 907 } 908 909 void java_lang_Class::initialize_mirror_fields(Klass* k, 910 Handle mirror, 911 Handle protection_domain, 912 Handle classData, 913 TRAPS) { 914 // Set protection domain also 915 set_protection_domain(mirror(), protection_domain()); 916 917 // Initialize static fields 918 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 919 920 // Set classData 921 set_class_data(mirror(), classData()); 922 } 923 924 // Set the java.lang.Module module field in the java_lang_Class mirror 925 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) { 926 if (module.is_null()) { 927 // During startup, the module may be null only if java.base has not been defined yet. 928 // Put the class on the fixup_module_list to patch later when the java.lang.Module 929 // for java.base is known. But note that since we captured the null module another 930 // thread may have completed that initialization. 931 932 bool javabase_was_defined = false; 933 { 934 MutexLocker m1(current, Module_lock); 935 // Keep list of classes needing java.base module fixup 936 if (!ModuleEntryTable::javabase_defined()) { 937 assert(k->java_mirror() != nullptr, "Class's mirror is null"); 938 k->class_loader_data()->inc_keep_alive(); 939 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized"); 940 fixup_module_field_list()->push(k); 941 } else { 942 javabase_was_defined = true; 943 } 944 } 945 946 // If java.base was already defined then patch this particular class with java.base. 947 if (javabase_was_defined) { 948 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 949 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr, 950 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 951 Handle javabase_handle(current, javabase_entry->module()); 952 set_module(mirror(), javabase_handle()); 953 } 954 } else { 955 assert(Universe::is_module_initialized() || 956 (ModuleEntryTable::javabase_defined() && 957 (module() == ModuleEntryTable::javabase_moduleEntry()->module())), 958 "Incorrect java.lang.Module specification while creating mirror"); 959 set_module(mirror(), module()); 960 } 961 } 962 963 // Statically allocate fixup lists because they always get created. 964 void java_lang_Class::allocate_fixup_lists() { 965 GrowableArray<Klass*>* mirror_list = 966 new (mtClass) GrowableArray<Klass*>(40, mtClass); 967 set_fixup_mirror_list(mirror_list); 968 969 GrowableArray<Klass*>* module_list = 970 new (mtModule) GrowableArray<Klass*>(500, mtModule); 971 set_fixup_module_field_list(module_list); 972 } 973 974 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData, 975 Handle& mirror, Handle& comp_mirror, TRAPS) { 976 // Allocate mirror (java.lang.Class instance) 977 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK); 978 mirror = Handle(THREAD, mirror_oop); 979 980 // Setup indirection from mirror->klass 981 set_klass(mirror(), k); 982 983 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 984 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 985 986 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 987 988 // It might also have a component mirror. This mirror must already exist. 989 if (k->is_array_klass()) { 990 if (k->is_typeArray_klass()) { 991 BasicType type = TypeArrayKlass::cast(k)->element_type(); 992 if (is_scratch) { 993 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type)); 994 } else { 995 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 996 } 997 } else { 998 assert(k->is_objArray_klass(), "Must be"); 999 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1000 assert(element_klass != nullptr, "Must have an element klass"); 1001 if (is_scratch) { 1002 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass)); 1003 } else { 1004 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 1005 } 1006 } 1007 assert(comp_mirror() != nullptr, "must have a mirror"); 1008 1009 // Two-way link between the array klass and its component mirror: 1010 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 1011 set_component_mirror(mirror(), comp_mirror()); 1012 // See below for ordering dependencies between field array_klass in component mirror 1013 // and java_mirror in this klass. 1014 } else { 1015 assert(k->is_instance_klass(), "Must be"); 1016 1017 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD); 1018 if (HAS_PENDING_EXCEPTION) { 1019 // If any of the fields throws an exception like OOM remove the klass field 1020 // from the mirror so GC doesn't follow it after the klass has been deallocated. 1021 // This mirror looks like a primitive type, which logically it is because it 1022 // it represents no class. 1023 set_klass(mirror(), nullptr); 1024 return; 1025 } 1026 } 1027 } 1028 1029 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 1030 Handle module, Handle protection_domain, 1031 Handle classData, TRAPS) { 1032 assert(k != nullptr, "Use create_basic_type_mirror for primitive types"); 1033 assert(k->java_mirror() == nullptr, "should only assign mirror once"); 1034 1035 // Use this moment of initialization to cache modifier_flags also, 1036 // to support Class.getModifiers(). Instance classes recalculate 1037 // the cached flags after the class file is parsed, but before the 1038 // class is put into the system dictionary. 1039 int computed_modifiers = k->compute_modifier_flags(); 1040 k->set_modifier_flags(computed_modifiers); 1041 // Class_klass has to be loaded because it is used to allocate 1042 // the mirror. 1043 if (vmClasses::Class_klass_loaded()) { 1044 Handle mirror; 1045 Handle comp_mirror; 1046 1047 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK); 1048 1049 // set the classLoader field in the java_lang_Class instance 1050 assert(class_loader() == k->class_loader(), "should be same"); 1051 set_class_loader(mirror(), class_loader()); 1052 1053 // Setup indirection from klass->mirror 1054 // after any exceptions can happen during allocations. 1055 k->set_java_mirror(mirror); 1056 1057 // Set the module field in the java_lang_Class instance. This must be done 1058 // after the mirror is set. 1059 set_mirror_module_field(THREAD, k, mirror, module); 1060 1061 if (comp_mirror() != nullptr) { 1062 // Set after k->java_mirror() is published, because compiled code running 1063 // concurrently doesn't expect a k to have a null java_mirror. 1064 release_set_array_klass(comp_mirror(), k); 1065 } 1066 if (CDSConfig::is_dumping_heap()) { 1067 create_scratch_mirror(k, CHECK); 1068 } 1069 } else { 1070 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized"); 1071 fixup_mirror_list()->push(k); 1072 } 1073 } 1074 1075 #if INCLUDE_CDS_JAVA_HEAP 1076 // The "scratch mirror" stores the states of the mirror object that can be 1077 // decided at dump time (such as the initial values of the static fields, the 1078 // component mirror, etc). At runtime, more information is added to it by 1079 // java_lang_Class::restore_archived_mirror(). 1080 // 1081 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror() 1082 // produces the same result as /*runtime*/create_mirror(). 1083 // 1084 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the 1085 // latter may contain dumptime-specific information that cannot be archived 1086 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution). 1087 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) { 1088 if (k->class_loader() != nullptr && 1089 k->class_loader() != SystemDictionary::java_platform_loader() && 1090 k->class_loader() != SystemDictionary::java_system_loader()) { 1091 // We only archive the mirrors of classes loaded by the built-in loaders 1092 return; 1093 } 1094 1095 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime 1096 Handle mirror; 1097 Handle comp_mirror; 1098 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK); 1099 1100 if (comp_mirror() != nullptr) { 1101 release_set_array_klass(comp_mirror(), k); 1102 } 1103 1104 HeapShared::set_scratch_java_mirror(k, mirror()); 1105 } 1106 1107 // Returns true if the mirror is updated, false if no archived mirror 1108 // data is present. After the archived mirror object is restored, the 1109 // shared klass' _has_raw_archived_mirror flag is cleared. 1110 bool java_lang_Class::restore_archived_mirror(Klass *k, 1111 Handle class_loader, Handle module, 1112 Handle protection_domain, TRAPS) { 1113 // Postpone restoring archived mirror until java.lang.Class is loaded. Please 1114 // see more details in vmClasses::resolve_all(). 1115 if (!vmClasses::Class_klass_loaded()) { 1116 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized"); 1117 fixup_mirror_list()->push(k); 1118 return true; 1119 } 1120 1121 oop m = k->archived_java_mirror(); 1122 assert(m != nullptr, "must have stored non-null archived mirror"); 1123 1124 // Sanity: clear it now to prevent re-initialization if any of the following fails 1125 k->clear_archived_mirror_index(); 1126 1127 // mirror is archived, restore 1128 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m)); 1129 assert(as_Klass(m) == k, "must be"); 1130 Handle mirror(THREAD, m); 1131 1132 if (!k->is_array_klass()) { 1133 // - local static final fields with initial values were initialized at dump time 1134 1135 if (protection_domain.not_null()) { 1136 set_protection_domain(mirror(), protection_domain()); 1137 } 1138 } 1139 1140 assert(class_loader() == k->class_loader(), "should be same"); 1141 if (class_loader.not_null()) { 1142 set_class_loader(mirror(), class_loader()); 1143 } 1144 1145 k->set_java_mirror(mirror); 1146 1147 set_mirror_module_field(THREAD, k, mirror, module); 1148 1149 if (log_is_enabled(Trace, cds, heap, mirror)) { 1150 ResourceMark rm(THREAD); 1151 log_trace(cds, heap, mirror)( 1152 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1153 } 1154 1155 return true; 1156 } 1157 #endif // INCLUDE_CDS_JAVA_HEAP 1158 1159 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1160 assert(_module_offset != 0, "must have been computed already"); 1161 set_module(k->java_mirror(), module()); 1162 } 1163 1164 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) { 1165 assert(_oop_size_offset != 0, "must be set"); 1166 assert(size > 0, "Oop size must be greater than zero, not " SIZE_FORMAT, size); 1167 assert(size <= INT_MAX, "Lossy conversion: " SIZE_FORMAT, size); 1168 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size; 1169 } 1170 1171 int java_lang_Class::static_oop_field_count(oop java_class) { 1172 assert(_static_oop_field_count_offset != 0, "must be set"); 1173 return java_class->int_field(_static_oop_field_count_offset); 1174 } 1175 1176 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1177 assert(_static_oop_field_count_offset != 0, "must be set"); 1178 java_class->int_field_put(_static_oop_field_count_offset, size); 1179 } 1180 1181 oop java_lang_Class::protection_domain(oop java_class) { 1182 assert(_protection_domain_offset != 0, "must be set"); 1183 return java_class->obj_field(_protection_domain_offset); 1184 } 1185 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1186 assert(_protection_domain_offset != 0, "must be set"); 1187 java_class->obj_field_put(_protection_domain_offset, pd); 1188 } 1189 1190 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1191 assert(_component_mirror_offset != 0, "must be set"); 1192 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1193 } 1194 oop java_lang_Class::component_mirror(oop java_class) { 1195 assert(_component_mirror_offset != 0, "must be set"); 1196 return java_class->obj_field(_component_mirror_offset); 1197 } 1198 1199 objArrayOop java_lang_Class::signers(oop java_class) { 1200 assert(_signers_offset != 0, "must be set"); 1201 return (objArrayOop)java_class->obj_field(_signers_offset); 1202 } 1203 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 1204 assert(_signers_offset != 0, "must be set"); 1205 java_class->obj_field_put(_signers_offset, signers); 1206 } 1207 1208 oop java_lang_Class::class_data(oop java_class) { 1209 assert(_classData_offset != 0, "must be set"); 1210 return java_class->obj_field(_classData_offset); 1211 } 1212 void java_lang_Class::set_class_data(oop java_class, oop class_data) { 1213 assert(_classData_offset != 0, "must be set"); 1214 java_class->obj_field_put(_classData_offset, class_data); 1215 } 1216 1217 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1218 assert(_class_loader_offset != 0, "offsets should have been initialized"); 1219 java_class->obj_field_put(_class_loader_offset, loader); 1220 } 1221 1222 oop java_lang_Class::class_loader(oop java_class) { 1223 assert(_class_loader_offset != 0, "must be set"); 1224 return java_class->obj_field(_class_loader_offset); 1225 } 1226 1227 oop java_lang_Class::module(oop java_class) { 1228 assert(_module_offset != 0, "must be set"); 1229 return java_class->obj_field(_module_offset); 1230 } 1231 1232 void java_lang_Class::set_module(oop java_class, oop module) { 1233 assert(_module_offset != 0, "must be set"); 1234 java_class->obj_field_put(_module_offset, module); 1235 } 1236 1237 oop java_lang_Class::name(Handle java_class, TRAPS) { 1238 assert(_name_offset != 0, "must be set"); 1239 oop o = java_class->obj_field(_name_offset); 1240 if (o == nullptr) { 1241 o = StringTable::intern(as_external_name(java_class()), THREAD); 1242 java_class->obj_field_put(_name_offset, o); 1243 } 1244 return o; 1245 } 1246 1247 oop java_lang_Class::source_file(oop java_class) { 1248 assert(_source_file_offset != 0, "must be set"); 1249 return java_class->obj_field(_source_file_offset); 1250 } 1251 1252 void java_lang_Class::set_source_file(oop java_class, oop source_file) { 1253 assert(_source_file_offset != 0, "must be set"); 1254 java_class->obj_field_put(_source_file_offset, source_file); 1255 } 1256 1257 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1258 // This should be improved by adding a field at the Java level or by 1259 // introducing a new VM klass (see comment in ClassFileParser) 1260 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL); 1261 if (type != T_VOID) { 1262 Klass* aklass = Universe::typeArrayKlassObj(type); 1263 assert(aklass != nullptr, "correct bootstrap"); 1264 release_set_array_klass(java_class, aklass); 1265 } 1266 #ifdef ASSERT 1267 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass()); 1268 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1269 #endif 1270 return java_class; 1271 } 1272 1273 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1274 assert(is_instance(java_class), "must be a Class object"); 1275 java_class->metadata_field_put(_klass_offset, klass); 1276 } 1277 1278 1279 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1280 assert(is_instance(java_class), "must be a Class object"); 1281 Symbol* name = nullptr; 1282 bool is_instance = false; 1283 if (is_primitive(java_class)) { 1284 name = vmSymbols::type_signature(primitive_type(java_class)); 1285 } else { 1286 Klass* k = as_Klass(java_class); 1287 is_instance = k->is_instance_klass(); 1288 name = k->name(); 1289 } 1290 if (name == nullptr) { 1291 st->print("<null>"); 1292 return; 1293 } 1294 if (is_instance) st->print("L"); 1295 st->write((char*) name->base(), (int) name->utf8_length()); 1296 if (is_instance) st->print(";"); 1297 } 1298 1299 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) { 1300 assert(is_instance(java_class), "must be a Class object"); 1301 Symbol* name; 1302 if (is_primitive(java_class)) { 1303 name = vmSymbols::type_signature(primitive_type(java_class)); 1304 // Because this can create a new symbol, the caller has to decrement 1305 // the refcount, so make adjustment here and below for symbols returned 1306 // that are not created or incremented due to a successful lookup. 1307 name->increment_refcount(); 1308 } else { 1309 Klass* k = as_Klass(java_class); 1310 if (!k->is_instance_klass()) { 1311 name = k->name(); 1312 name->increment_refcount(); 1313 } else { 1314 ResourceMark rm; 1315 const char* sigstr = k->signature_name(); 1316 int siglen = (int) strlen(sigstr); 1317 if (!intern_if_not_found) { 1318 name = SymbolTable::probe(sigstr, siglen); 1319 } else { 1320 name = SymbolTable::new_symbol(sigstr, siglen); 1321 } 1322 } 1323 } 1324 return name; 1325 } 1326 1327 // Returns the Java name for this Java mirror (Resource allocated) 1328 // See Klass::external_name(). 1329 // For primitive type Java mirrors, its type name is returned. 1330 const char* java_lang_Class::as_external_name(oop java_class) { 1331 assert(is_instance(java_class), "must be a Class object"); 1332 const char* name = nullptr; 1333 if (is_primitive(java_class)) { 1334 name = type2name(primitive_type(java_class)); 1335 } else { 1336 name = as_Klass(java_class)->external_name(); 1337 } 1338 if (name == nullptr) { 1339 name = "<null>"; 1340 } 1341 return name; 1342 } 1343 1344 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1345 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1346 assert(k == nullptr || k->is_klass() && k->is_array_klass(), "should be array klass"); 1347 return k; 1348 } 1349 1350 1351 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1352 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1353 java_class->release_metadata_field_put(_array_klass_offset, klass); 1354 } 1355 1356 1357 BasicType java_lang_Class::primitive_type(oop java_class) { 1358 assert(is_primitive(java_class), "just checking"); 1359 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1360 BasicType type = T_VOID; 1361 if (ak != nullptr) { 1362 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1363 type = ArrayKlass::cast(ak)->element_type(); 1364 } else { 1365 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1366 } 1367 #ifdef ASSERT 1368 if (CDSConfig::is_dumping_heap()) { 1369 oop mirror = Universe::java_mirror(type); 1370 oop scratch_mirror = HeapShared::scratch_java_mirror(type); 1371 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent"); 1372 } else { 1373 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1374 } 1375 #endif 1376 return type; 1377 } 1378 1379 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1380 assert(is_instance(java_class), "must be a Class object"); 1381 if (is_primitive(java_class)) { 1382 if (reference_klass != nullptr) 1383 (*reference_klass) = nullptr; 1384 return primitive_type(java_class); 1385 } else { 1386 if (reference_klass != nullptr) 1387 (*reference_klass) = as_Klass(java_class); 1388 return T_OBJECT; 1389 } 1390 } 1391 1392 1393 oop java_lang_Class::primitive_mirror(BasicType t) { 1394 oop mirror = Universe::java_mirror(t); 1395 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class"); 1396 assert(is_primitive(mirror), "must be primitive"); 1397 return mirror; 1398 } 1399 1400 #define CLASS_FIELDS_DO(macro) \ 1401 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \ 1402 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1403 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1404 macro(_module_offset, k, "module", module_signature, false); \ 1405 macro(_name_offset, k, "name", string_signature, false); \ 1406 macro(_classData_offset, k, "classData", object_signature, false); 1407 1408 void java_lang_Class::compute_offsets() { 1409 if (_offsets_computed) { 1410 return; 1411 } 1412 1413 _offsets_computed = true; 1414 1415 InstanceKlass* k = vmClasses::Class_klass(); 1416 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1417 1418 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1419 } 1420 1421 #if INCLUDE_CDS 1422 void java_lang_Class::serialize_offsets(SerializeClosure* f) { 1423 f->do_bool(&_offsets_computed); 1424 1425 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1426 1427 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1428 } 1429 #endif 1430 1431 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1432 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1433 return the_class_mirror->int_field(_classRedefinedCount_offset); 1434 } 1435 1436 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1437 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1438 the_class_mirror->int_field_put(_classRedefinedCount_offset, value); 1439 } 1440 1441 1442 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1443 // platform thread structure, and a eetop offset which was used for thread 1444 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1445 // merged, so in the HotSpot VM we just use the eetop field for the thread 1446 // instead of the privateInfo_offset. 1447 // 1448 // Note: The stackSize field is only present starting in 1.4. 1449 1450 int java_lang_Thread_FieldHolder::_group_offset; 1451 int java_lang_Thread_FieldHolder::_priority_offset; 1452 int java_lang_Thread_FieldHolder::_stackSize_offset; 1453 int java_lang_Thread_FieldHolder::_daemon_offset; 1454 int java_lang_Thread_FieldHolder::_thread_status_offset; 1455 1456 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \ 1457 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1458 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1459 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1460 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1461 macro(_thread_status_offset, k, "threadStatus", int_signature, false) 1462 1463 void java_lang_Thread_FieldHolder::compute_offsets() { 1464 assert(_group_offset == 0, "offsets should be initialized only once"); 1465 1466 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass(); 1467 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1468 } 1469 1470 #if INCLUDE_CDS 1471 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) { 1472 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1473 } 1474 #endif 1475 1476 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) { 1477 return holder->obj_field(_group_offset); 1478 } 1479 1480 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) { 1481 return (ThreadPriority)holder->int_field(_priority_offset); 1482 } 1483 1484 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) { 1485 holder->int_field_put(_priority_offset, priority); 1486 } 1487 1488 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) { 1489 return holder->long_field(_stackSize_offset); 1490 } 1491 1492 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) { 1493 return holder->bool_field(_daemon_offset) != 0; 1494 } 1495 1496 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) { 1497 assert(val, "daemon status is never turned off"); 1498 holder->bool_field_put(_daemon_offset, val); 1499 } 1500 1501 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) { 1502 holder->int_field_put(_thread_status_offset, static_cast<int>(status)); 1503 } 1504 1505 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) { 1506 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset)); 1507 } 1508 1509 1510 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0; 1511 1512 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \ 1513 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true); 1514 1515 void java_lang_Thread_Constants::compute_offsets() { 1516 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once"); 1517 1518 InstanceKlass* k = vmClasses::Thread_Constants_klass(); 1519 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1520 } 1521 1522 #if INCLUDE_CDS 1523 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) { 1524 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1525 } 1526 #endif 1527 1528 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() { 1529 InstanceKlass* k = vmClasses::Thread_Constants_klass(); 1530 oop base = k->static_field_base_raw(); 1531 return base->obj_field(_static_VTHREAD_GROUP_offset); 1532 } 1533 1534 1535 int java_lang_Thread::_holder_offset; 1536 int java_lang_Thread::_name_offset; 1537 int java_lang_Thread::_contextClassLoader_offset; 1538 int java_lang_Thread::_inheritedAccessControlContext_offset; 1539 int java_lang_Thread::_eetop_offset; 1540 int java_lang_Thread::_jvmti_thread_state_offset; 1541 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset; 1542 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset; 1543 int java_lang_Thread::_interrupted_offset; 1544 int java_lang_Thread::_tid_offset; 1545 int java_lang_Thread::_continuation_offset; 1546 int java_lang_Thread::_park_blocker_offset; 1547 int java_lang_Thread::_scopedValueBindings_offset; 1548 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;) 1549 1550 #define THREAD_FIELDS_DO(macro) \ 1551 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \ 1552 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1553 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \ 1554 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \ 1555 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1556 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \ 1557 macro(_tid_offset, k, "tid", long_signature, false); \ 1558 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \ 1559 macro(_continuation_offset, k, "cont", continuation_signature, false); \ 1560 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false); 1561 1562 void java_lang_Thread::compute_offsets() { 1563 assert(_holder_offset == 0, "offsets should be initialized only once"); 1564 1565 InstanceKlass* k = vmClasses::Thread_klass(); 1566 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1567 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1568 } 1569 1570 #if INCLUDE_CDS 1571 void java_lang_Thread::serialize_offsets(SerializeClosure* f) { 1572 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1573 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1574 } 1575 #endif 1576 1577 JavaThread* java_lang_Thread::thread(oop java_thread) { 1578 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset)); 1579 } 1580 1581 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) { 1582 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset)); 1583 } 1584 1585 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1586 java_thread->address_field_put(_eetop_offset, (address)thread); 1587 } 1588 1589 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) { 1590 java_thread->release_address_field_put(_eetop_offset, (address)thread); 1591 } 1592 1593 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) { 1594 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset); 1595 } 1596 1597 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) { 1598 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state); 1599 } 1600 1601 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) { 1602 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset); 1603 } 1604 1605 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) { 1606 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked"); 1607 int val = VTMS_transition_disable_count(java_thread); 1608 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1); 1609 } 1610 1611 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) { 1612 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked"); 1613 int val = VTMS_transition_disable_count(java_thread); 1614 assert(val > 0, "VTMS_transition_disable_count should never be negative"); 1615 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1); 1616 } 1617 1618 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) { 1619 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset); 1620 } 1621 1622 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) { 1623 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val); 1624 } 1625 1626 int java_lang_Thread::is_in_VTMS_transition_offset() { 1627 return _jvmti_is_in_VTMS_transition_offset; 1628 } 1629 1630 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) { 1631 assert(java_thread != nullptr, "need a java_lang_Thread pointer here"); 1632 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr); 1633 } 1634 1635 oop java_lang_Thread::holder(oop java_thread) { 1636 // Note: may return null if the thread is still attaching 1637 return java_thread->obj_field(_holder_offset); 1638 } 1639 1640 bool java_lang_Thread::interrupted(oop java_thread) { 1641 // Make sure the caller can safely access oops. 1642 assert(Thread::current()->is_VM_thread() || 1643 (JavaThread::current()->thread_state() != _thread_blocked && 1644 JavaThread::current()->thread_state() != _thread_in_native), 1645 "Unsafe access to oop"); 1646 return java_thread->bool_field_volatile(_interrupted_offset); 1647 } 1648 1649 void java_lang_Thread::set_interrupted(oop java_thread, bool val) { 1650 // Make sure the caller can safely access oops. 1651 assert(Thread::current()->is_VM_thread() || 1652 (JavaThread::current()->thread_state() != _thread_blocked && 1653 JavaThread::current()->thread_state() != _thread_in_native), 1654 "Unsafe access to oop"); 1655 java_thread->bool_field_put_volatile(_interrupted_offset, val); 1656 } 1657 1658 1659 oop java_lang_Thread::name(oop java_thread) { 1660 return java_thread->obj_field(_name_offset); 1661 } 1662 1663 1664 void java_lang_Thread::set_name(oop java_thread, oop name) { 1665 java_thread->obj_field_put(_name_offset, name); 1666 } 1667 1668 // Convenience macros for setting and getting Thread fields that 1669 // are actually stored in the FieldHolder object of the thread. 1670 // The FieldHolder can be null whilst a thread is attaching via 1671 // JNI, and when the main thread is attaching. 1672 1673 // The default value should be the default/zero initialized value 1674 // of the field as it would be in java.lang.Thread.FieldHolder. 1675 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \ 1676 { \ 1677 oop holder = java_lang_Thread::holder(java_thread); \ 1678 if (holder != nullptr) \ 1679 return java_lang_Thread_FieldHolder::field(holder); \ 1680 else \ 1681 return default_val; \ 1682 } 1683 1684 // We should never be trying to set a field of an attaching thread. 1685 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \ 1686 { \ 1687 oop holder = java_lang_Thread::holder(java_thread); \ 1688 assert(holder != nullptr, "Thread not fully initialized"); \ 1689 java_lang_Thread_FieldHolder::set_##field(holder, value); \ 1690 } 1691 1692 1693 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1694 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0); 1695 } 1696 1697 1698 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1699 SET_FIELDHOLDER_FIELD(java_thread, priority, priority) 1700 } 1701 1702 1703 oop java_lang_Thread::threadGroup(oop java_thread) { 1704 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr); 1705 } 1706 1707 1708 bool java_lang_Thread::is_alive(oop java_thread) { 1709 JavaThread* thr = java_lang_Thread::thread(java_thread); 1710 return (thr != nullptr); 1711 } 1712 1713 1714 bool java_lang_Thread::is_daemon(oop java_thread) { 1715 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false); 1716 } 1717 1718 1719 void java_lang_Thread::set_daemon(oop java_thread) { 1720 SET_FIELDHOLDER_FIELD(java_thread, daemon, true); 1721 } 1722 1723 oop java_lang_Thread::context_class_loader(oop java_thread) { 1724 return java_thread->obj_field(_contextClassLoader_offset); 1725 } 1726 1727 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1728 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1729 } 1730 1731 1732 jlong java_lang_Thread::stackSize(oop java_thread) { 1733 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0); 1734 } 1735 1736 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1737 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) { 1738 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status); 1739 } 1740 1741 // Read thread status value from threadStatus field in java.lang.Thread java class. 1742 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1743 // Make sure the caller is operating on behalf of the VM or is 1744 // running VM code (state == _thread_in_vm). 1745 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1746 JavaThread::current()->thread_state() == _thread_in_vm, 1747 "Java Thread is not running in vm"); 1748 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */); 1749 } 1750 1751 ByteSize java_lang_Thread::thread_id_offset() { 1752 return in_ByteSize(_tid_offset); 1753 } 1754 1755 oop java_lang_Thread::park_blocker(oop java_thread) { 1756 return java_thread->obj_field(_park_blocker_offset); 1757 } 1758 1759 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) { 1760 ThreadsListHandle tlh(JavaThread::current()); 1761 JavaThread* thread; 1762 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread); 1763 if (is_virtual) { 1764 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread); 1765 if (carrier_thread == nullptr) { 1766 return nullptr; 1767 } 1768 thread = java_lang_Thread::thread(carrier_thread); 1769 } else { 1770 thread = java_lang_Thread::thread(java_thread); 1771 } 1772 if (thread == nullptr) { 1773 return nullptr; 1774 } 1775 1776 class GetStackTraceClosure : public HandshakeClosure { 1777 public: 1778 const Handle _java_thread; 1779 int _depth; 1780 bool _retry_handshake; 1781 GrowableArray<Method*>* _methods; 1782 GrowableArray<int>* _bcis; 1783 1784 GetStackTraceClosure(Handle java_thread) : 1785 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false), 1786 _methods(nullptr), _bcis(nullptr) { 1787 } 1788 ~GetStackTraceClosure() { 1789 delete _methods; 1790 delete _bcis; 1791 } 1792 1793 bool read_reset_retry() { 1794 bool ret = _retry_handshake; 1795 // If we re-execute the handshake this method need to return false 1796 // when the handshake cannot be performed. (E.g. thread terminating) 1797 _retry_handshake = false; 1798 return ret; 1799 } 1800 1801 void do_thread(Thread* th) { 1802 if (!Thread::current()->is_Java_thread()) { 1803 _retry_handshake = true; 1804 return; 1805 } 1806 1807 JavaThread* thread = JavaThread::cast(th); 1808 1809 if (!thread->has_last_Java_frame()) { 1810 return; 1811 } 1812 1813 bool carrier = false; 1814 if (java_lang_VirtualThread::is_instance(_java_thread())) { 1815 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread 1816 const ContinuationEntry* ce = thread->vthread_continuation(); 1817 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) { 1818 return; // not mounted 1819 } 1820 } else { 1821 carrier = (thread->vthread_continuation() != nullptr); 1822 } 1823 1824 const int max_depth = MaxJavaStackTraceDepth; 1825 const bool skip_hidden = !ShowHiddenFrames; 1826 1827 // Pick minimum length that will cover most cases 1828 int init_length = 64; 1829 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal); 1830 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal); 1831 1832 int total_count = 0; 1833 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops 1834 !vfst.at_end() && (max_depth == 0 || max_depth != total_count); 1835 vfst.next()) { 1836 1837 if (skip_hidden && (vfst.method()->is_hidden() || 1838 vfst.method()->is_continuation_enter_intrinsic())) { 1839 continue; 1840 } 1841 1842 _methods->push(vfst.method()); 1843 _bcis->push(vfst.bci()); 1844 total_count++; 1845 } 1846 1847 _depth = total_count; 1848 } 1849 }; 1850 1851 // Handshake with target 1852 ResourceMark rm(THREAD); 1853 HandleMark hm(THREAD); 1854 GetStackTraceClosure gstc(Handle(THREAD, java_thread)); 1855 do { 1856 Handshake::execute(&gstc, &tlh, thread); 1857 } while (gstc.read_reset_retry()); 1858 1859 // Stop if no stack trace is found. 1860 if (gstc._depth == 0) { 1861 return nullptr; 1862 } 1863 1864 // Convert to StackTraceElement array 1865 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 1866 assert(k != nullptr, "must be loaded in 1.4+"); 1867 if (k->should_be_initialized()) { 1868 k->initialize(CHECK_NULL); 1869 } 1870 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL); 1871 1872 for (int i = 0; i < gstc._depth; i++) { 1873 methodHandle method(THREAD, gstc._methods->at(i)); 1874 oop element = java_lang_StackTraceElement::create(method, 1875 gstc._bcis->at(i), 1876 CHECK_NULL); 1877 trace->obj_at_put(i, element); 1878 } 1879 1880 return trace(); 1881 } 1882 1883 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1884 JavaThreadStatus status = get_thread_status(java_thread); 1885 switch (status) { 1886 case JavaThreadStatus::NEW : return "NEW"; 1887 case JavaThreadStatus::RUNNABLE : return "RUNNABLE"; 1888 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)"; 1889 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1890 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1891 case JavaThreadStatus::PARKED : return "WAITING (parking)"; 1892 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)"; 1893 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1894 case JavaThreadStatus::TERMINATED : return "TERMINATED"; 1895 default : return "UNKNOWN"; 1896 }; 1897 } 1898 int java_lang_ThreadGroup::_parent_offset; 1899 int java_lang_ThreadGroup::_name_offset; 1900 int java_lang_ThreadGroup::_maxPriority_offset; 1901 int java_lang_ThreadGroup::_daemon_offset; 1902 1903 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1904 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1905 return java_thread_group->obj_field(_parent_offset); 1906 } 1907 1908 // ("name as oop" accessor is not necessary) 1909 1910 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1911 oop name = java_thread_group->obj_field(_name_offset); 1912 // ThreadGroup.name can be null 1913 if (name != nullptr) { 1914 return java_lang_String::as_utf8_string(name); 1915 } 1916 return nullptr; 1917 } 1918 1919 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1920 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1921 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1922 } 1923 1924 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1925 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1926 return java_thread_group->bool_field(_daemon_offset) != 0; 1927 } 1928 1929 #define THREADGROUP_FIELDS_DO(macro) \ 1930 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \ 1931 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1932 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \ 1933 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); 1934 1935 void java_lang_ThreadGroup::compute_offsets() { 1936 assert(_parent_offset == 0, "offsets should be initialized only once"); 1937 1938 InstanceKlass* k = vmClasses::ThreadGroup_klass(); 1939 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1940 } 1941 1942 #if INCLUDE_CDS 1943 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) { 1944 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1945 } 1946 #endif 1947 1948 1949 // java_lang_VirtualThread 1950 1951 int java_lang_VirtualThread::static_vthread_scope_offset; 1952 int java_lang_VirtualThread::_carrierThread_offset; 1953 int java_lang_VirtualThread::_continuation_offset; 1954 int java_lang_VirtualThread::_state_offset; 1955 1956 #define VTHREAD_FIELDS_DO(macro) \ 1957 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \ 1958 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \ 1959 macro(_continuation_offset, k, "cont", continuation_signature, false); \ 1960 macro(_state_offset, k, "state", int_signature, false) 1961 1962 1963 void java_lang_VirtualThread::compute_offsets() { 1964 InstanceKlass* k = vmClasses::VirtualThread_klass(); 1965 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1966 } 1967 1968 bool java_lang_VirtualThread::is_instance(oop obj) { 1969 return obj != nullptr && is_subclass(obj->klass()); 1970 } 1971 1972 oop java_lang_VirtualThread::carrier_thread(oop vthread) { 1973 oop thread = vthread->obj_field(_carrierThread_offset); 1974 return thread; 1975 } 1976 1977 oop java_lang_VirtualThread::continuation(oop vthread) { 1978 oop cont = vthread->obj_field(_continuation_offset); 1979 return cont; 1980 } 1981 1982 int java_lang_VirtualThread::state(oop vthread) { 1983 return vthread->int_field_acquire(_state_offset); 1984 } 1985 1986 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) { 1987 JavaThreadStatus status = JavaThreadStatus::NEW; 1988 switch (state & ~SUSPENDED) { 1989 case NEW : 1990 status = JavaThreadStatus::NEW; 1991 break; 1992 case STARTED : 1993 case RUNNABLE : 1994 case RUNNING : 1995 case PARKING : 1996 case TIMED_PARKING: 1997 case YIELDING : 1998 status = JavaThreadStatus::RUNNABLE; 1999 break; 2000 case PARKED : 2001 case PINNED : 2002 status = JavaThreadStatus::PARKED; 2003 break; 2004 case TIMED_PARKED: 2005 case TIMED_PINNED: 2006 status = JavaThreadStatus::PARKED_TIMED; 2007 break; 2008 case TERMINATED : 2009 status = JavaThreadStatus::TERMINATED; 2010 break; 2011 default: 2012 ShouldNotReachHere(); 2013 } 2014 return status; 2015 } 2016 2017 #if INCLUDE_CDS 2018 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) { 2019 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2020 } 2021 #endif 2022 2023 // java_lang_Throwable 2024 2025 int java_lang_Throwable::_backtrace_offset; 2026 int java_lang_Throwable::_detailMessage_offset; 2027 int java_lang_Throwable::_stackTrace_offset; 2028 int java_lang_Throwable::_depth_offset; 2029 int java_lang_Throwable::_cause_offset; 2030 int java_lang_Throwable::_static_unassigned_stacktrace_offset; 2031 2032 #define THROWABLE_FIELDS_DO(macro) \ 2033 macro(_backtrace_offset, k, "backtrace", object_signature, false); \ 2034 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \ 2035 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 2036 macro(_depth_offset, k, "depth", int_signature, false); \ 2037 macro(_cause_offset, k, "cause", throwable_signature, false); \ 2038 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 2039 2040 void java_lang_Throwable::compute_offsets() { 2041 InstanceKlass* k = vmClasses::Throwable_klass(); 2042 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2043 } 2044 2045 #if INCLUDE_CDS 2046 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) { 2047 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2048 } 2049 #endif 2050 2051 oop java_lang_Throwable::unassigned_stacktrace() { 2052 InstanceKlass* ik = vmClasses::Throwable_klass(); 2053 oop base = ik->static_field_base_raw(); 2054 return base->obj_field(_static_unassigned_stacktrace_offset); 2055 } 2056 2057 oop java_lang_Throwable::backtrace(oop throwable) { 2058 return throwable->obj_field_acquire(_backtrace_offset); 2059 } 2060 2061 2062 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 2063 throwable->release_obj_field_put(_backtrace_offset, value); 2064 } 2065 2066 int java_lang_Throwable::depth(oop throwable) { 2067 return throwable->int_field(_depth_offset); 2068 } 2069 2070 void java_lang_Throwable::set_depth(oop throwable, int value) { 2071 throwable->int_field_put(_depth_offset, value); 2072 } 2073 2074 oop java_lang_Throwable::message(oop throwable) { 2075 return throwable->obj_field(_detailMessage_offset); 2076 } 2077 2078 oop java_lang_Throwable::cause(oop throwable) { 2079 return throwable->obj_field(_cause_offset); 2080 } 2081 2082 // Return Symbol for detailed_message or null 2083 Symbol* java_lang_Throwable::detail_message(oop throwable) { 2084 PreserveExceptionMark pm(Thread::current()); 2085 oop detailed_message = java_lang_Throwable::message(throwable); 2086 if (detailed_message != nullptr) { 2087 return java_lang_String::as_symbol(detailed_message); 2088 } 2089 return nullptr; 2090 } 2091 2092 void java_lang_Throwable::set_message(oop throwable, oop value) { 2093 throwable->obj_field_put(_detailMessage_offset, value); 2094 } 2095 2096 2097 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 2098 throwable->obj_field_put(_stackTrace_offset, st_element_array); 2099 } 2100 2101 void java_lang_Throwable::clear_stacktrace(oop throwable) { 2102 set_stacktrace(throwable, nullptr); 2103 } 2104 2105 2106 void java_lang_Throwable::print(oop throwable, outputStream* st) { 2107 ResourceMark rm; 2108 Klass* k = throwable->klass(); 2109 assert(k != nullptr, "just checking"); 2110 st->print("%s", k->external_name()); 2111 oop msg = message(throwable); 2112 if (msg != nullptr) { 2113 st->print(": %s", java_lang_String::as_utf8_string(msg)); 2114 } 2115 } 2116 2117 // After this many redefines, the stack trace is unreliable. 2118 const int MAX_VERSION = USHRT_MAX; 2119 2120 static inline bool version_matches(Method* method, int version) { 2121 assert(version < MAX_VERSION, "version is too big"); 2122 return method != nullptr && (method->constants()->version() == version); 2123 } 2124 2125 // This class provides a simple wrapper over the internal structure of 2126 // exception backtrace to insulate users of the backtrace from needing 2127 // to know what it looks like. 2128 // The code of this class is not GC safe. Allocations can only happen 2129 // in expand(). 2130 class BacktraceBuilder: public StackObj { 2131 friend class BacktraceIterator; 2132 private: 2133 Handle _backtrace; 2134 objArrayOop _head; 2135 typeArrayOop _methods; 2136 typeArrayOop _bcis; 2137 objArrayOop _mirrors; 2138 typeArrayOop _names; // Needed to insulate method name against redefinition. 2139 // True if the top frame of the backtrace is omitted because it shall be hidden. 2140 bool _has_hidden_top_frame; 2141 int _index; 2142 NoSafepointVerifier _nsv; 2143 2144 enum { 2145 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 2146 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 2147 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 2148 trace_names_offset = java_lang_Throwable::trace_names_offset, 2149 trace_conts_offset = java_lang_Throwable::trace_conts_offset, 2150 trace_next_offset = java_lang_Throwable::trace_next_offset, 2151 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset, 2152 trace_size = java_lang_Throwable::trace_size, 2153 trace_chunk_size = java_lang_Throwable::trace_chunk_size 2154 }; 2155 2156 // get info out of chunks 2157 static typeArrayOop get_methods(objArrayHandle chunk) { 2158 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 2159 assert(methods != nullptr, "method array should be initialized in backtrace"); 2160 return methods; 2161 } 2162 static typeArrayOop get_bcis(objArrayHandle chunk) { 2163 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 2164 assert(bcis != nullptr, "bci array should be initialized in backtrace"); 2165 return bcis; 2166 } 2167 static objArrayOop get_mirrors(objArrayHandle chunk) { 2168 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 2169 assert(mirrors != nullptr, "mirror array should be initialized in backtrace"); 2170 return mirrors; 2171 } 2172 static typeArrayOop get_names(objArrayHandle chunk) { 2173 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 2174 assert(names != nullptr, "names array should be initialized in backtrace"); 2175 return names; 2176 } 2177 static bool has_hidden_top_frame(objArrayHandle chunk) { 2178 oop hidden = chunk->obj_at(trace_hidden_offset); 2179 return hidden != nullptr; 2180 } 2181 2182 public: 2183 2184 // constructor for new backtrace 2185 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) { 2186 expand(CHECK); 2187 _backtrace = Handle(THREAD, _head); 2188 _index = 0; 2189 } 2190 2191 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 2192 _methods = get_methods(backtrace); 2193 _bcis = get_bcis(backtrace); 2194 _mirrors = get_mirrors(backtrace); 2195 _names = get_names(backtrace); 2196 _has_hidden_top_frame = has_hidden_top_frame(backtrace); 2197 assert(_methods->length() == _bcis->length() && 2198 _methods->length() == _mirrors->length() && 2199 _mirrors->length() == _names->length(), 2200 "method and source information arrays should match"); 2201 2202 // head is the preallocated backtrace 2203 _head = backtrace(); 2204 _backtrace = Handle(thread, _head); 2205 _index = 0; 2206 } 2207 2208 void expand(TRAPS) { 2209 objArrayHandle old_head(THREAD, _head); 2210 PauseNoSafepointVerifier pnsv(&_nsv); 2211 2212 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2213 objArrayHandle new_head(THREAD, head); 2214 2215 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2216 typeArrayHandle new_methods(THREAD, methods); 2217 2218 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2219 typeArrayHandle new_bcis(THREAD, bcis); 2220 2221 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2222 objArrayHandle new_mirrors(THREAD, mirrors); 2223 2224 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2225 typeArrayHandle new_names(THREAD, names); 2226 2227 if (!old_head.is_null()) { 2228 old_head->obj_at_put(trace_next_offset, new_head()); 2229 } 2230 new_head->obj_at_put(trace_methods_offset, new_methods()); 2231 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2232 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2233 new_head->obj_at_put(trace_names_offset, new_names()); 2234 new_head->obj_at_put(trace_hidden_offset, nullptr); 2235 2236 _head = new_head(); 2237 _methods = new_methods(); 2238 _bcis = new_bcis(); 2239 _mirrors = new_mirrors(); 2240 _names = new_names(); 2241 _index = 0; 2242 } 2243 2244 oop backtrace() { 2245 return _backtrace(); 2246 } 2247 2248 inline void push(Method* method, int bci, TRAPS) { 2249 // Smear the -1 bci to 0 since the array only holds unsigned 2250 // shorts. The later line number lookup would just smear the -1 2251 // to a 0 even if it could be recorded. 2252 if (bci == SynchronizationEntryBCI) bci = 0; 2253 2254 if (_index >= trace_chunk_size) { 2255 methodHandle mhandle(THREAD, method); 2256 expand(CHECK); 2257 method = mhandle(); 2258 } 2259 2260 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2261 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2262 2263 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2264 // klass owning the symbols alive so their refcounts aren't decremented. 2265 Symbol* name = method->name(); 2266 _names->symbol_at_put(_index, name); 2267 2268 // We need to save the mirrors in the backtrace to keep the class 2269 // from being unloaded while we still have this stack trace. 2270 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror"); 2271 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2272 2273 _index++; 2274 } 2275 2276 void set_has_hidden_top_frame() { 2277 if (!_has_hidden_top_frame) { 2278 // It would be nice to add java/lang/Boolean::TRUE here 2279 // to indicate that this backtrace has a hidden top frame. 2280 // But this code is used before TRUE is allocated. 2281 // Therefore let's just use an arbitrary legal oop 2282 // available right here. _methods is a short[]. 2283 assert(_methods != nullptr, "we need a legal oop"); 2284 _has_hidden_top_frame = true; 2285 _head->obj_at_put(trace_hidden_offset, _methods); 2286 } 2287 } 2288 }; 2289 2290 struct BacktraceElement : public StackObj { 2291 int _method_id; 2292 int _bci; 2293 int _version; 2294 Symbol* _name; 2295 Handle _mirror; 2296 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2297 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {} 2298 }; 2299 2300 class BacktraceIterator : public StackObj { 2301 int _index; 2302 objArrayHandle _result; 2303 objArrayHandle _mirrors; 2304 typeArrayHandle _methods; 2305 typeArrayHandle _bcis; 2306 typeArrayHandle _names; 2307 2308 void init(objArrayHandle result, Thread* thread) { 2309 // Get method id, bci, version and mirror from chunk 2310 _result = result; 2311 if (_result.not_null()) { 2312 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2313 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2314 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2315 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2316 _index = 0; 2317 } 2318 } 2319 public: 2320 BacktraceIterator(objArrayHandle result, Thread* thread) { 2321 init(result, thread); 2322 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2323 } 2324 2325 BacktraceElement next(Thread* thread) { 2326 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2327 _methods->ushort_at(_index), 2328 Backtrace::version_at(_bcis->int_at(_index)), 2329 Backtrace::bci_at(_bcis->int_at(_index)), 2330 _names->symbol_at(_index)); 2331 _index++; 2332 2333 if (_index >= java_lang_Throwable::trace_chunk_size) { 2334 int next_offset = java_lang_Throwable::trace_next_offset; 2335 // Get next chunk 2336 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2337 init(result, thread); 2338 } 2339 return e; 2340 } 2341 2342 bool repeat() { 2343 return _result.not_null() && _mirrors->obj_at(_index) != nullptr; 2344 } 2345 }; 2346 2347 2348 // Print stack trace element to resource allocated buffer 2349 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 2350 int version, int bci, Symbol* name) { 2351 ResourceMark rm; 2352 2353 // Get strings and string lengths 2354 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2355 const char* klass_name = holder->external_name(); 2356 int buf_len = (int)strlen(klass_name); 2357 2358 char* method_name = name->as_C_string(); 2359 buf_len += (int)strlen(method_name); 2360 2361 char* source_file_name = nullptr; 2362 Symbol* source = Backtrace::get_source_file_name(holder, version); 2363 if (source != nullptr) { 2364 source_file_name = source->as_C_string(); 2365 buf_len += (int)strlen(source_file_name); 2366 } 2367 2368 char *module_name = nullptr, *module_version = nullptr; 2369 ModuleEntry* module = holder->module(); 2370 if (module->is_named()) { 2371 module_name = module->name()->as_C_string(); 2372 buf_len += (int)strlen(module_name); 2373 if (module->version() != nullptr) { 2374 module_version = module->version()->as_C_string(); 2375 buf_len += (int)strlen(module_version); 2376 } 2377 } 2378 2379 // Allocate temporary buffer with extra space for formatting and line number 2380 const size_t buf_size = buf_len + 64; 2381 char* buf = NEW_RESOURCE_ARRAY(char, buf_size); 2382 2383 // Print stack trace line in buffer 2384 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name); 2385 2386 // Print module information 2387 if (module_name != nullptr) { 2388 if (module_version != nullptr) { 2389 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version); 2390 } else { 2391 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name); 2392 } 2393 } 2394 2395 // The method can be null if the requested class version is gone 2396 Method* method = holder->method_with_orig_idnum(method_id, version); 2397 if (!version_matches(method, version)) { 2398 strcat(buf, "Redefined)"); 2399 } else { 2400 int line_number = Backtrace::get_line_number(method, bci); 2401 if (line_number == -2) { 2402 strcat(buf, "Native Method)"); 2403 } else { 2404 if (source_file_name != nullptr && (line_number != -1)) { 2405 // Sourcename and linenumber 2406 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number); 2407 } else if (source_file_name != nullptr) { 2408 // Just sourcename 2409 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name); 2410 } else { 2411 // Neither sourcename nor linenumber 2412 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)"); 2413 } 2414 CompiledMethod* nm = method->code(); 2415 if (WizardMode && nm != nullptr) { 2416 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 2417 } 2418 } 2419 } 2420 2421 st->print_cr("%s", buf); 2422 } 2423 2424 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) { 2425 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 2426 int method_id = method->orig_method_idnum(); 2427 int version = method->constants()->version(); 2428 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 2429 } 2430 2431 /** 2432 * Print the throwable message and its stack trace plus all causes by walking the 2433 * cause chain. The output looks the same as of Throwable.printStackTrace(). 2434 */ 2435 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 2436 // First, print the message. 2437 print(throwable(), st); 2438 st->cr(); 2439 2440 // Now print the stack trace. 2441 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2442 while (throwable.not_null()) { 2443 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 2444 if (result.is_null()) { 2445 st->print_raw_cr("\t<<no stack trace available>>"); 2446 return; 2447 } 2448 BacktraceIterator iter(result, THREAD); 2449 2450 while (iter.repeat()) { 2451 BacktraceElement bte = iter.next(THREAD); 2452 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 2453 } 2454 if (THREAD->can_call_java()) { 2455 // Call getCause() which doesn't necessarily return the _cause field. 2456 ExceptionMark em(THREAD); 2457 JavaValue cause(T_OBJECT); 2458 JavaCalls::call_virtual(&cause, 2459 throwable, 2460 throwable->klass(), 2461 vmSymbols::getCause_name(), 2462 vmSymbols::void_throwable_signature(), 2463 THREAD); 2464 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 2465 if (HAS_PENDING_EXCEPTION) { 2466 CLEAR_PENDING_EXCEPTION; 2467 throwable = Handle(); 2468 } else { 2469 throwable = Handle(THREAD, cause.get_oop()); 2470 if (throwable.not_null()) { 2471 st->print("Caused by: "); 2472 print(throwable(), st); 2473 st->cr(); 2474 } 2475 } 2476 } else { 2477 st->print_raw_cr("<<cannot call Java to get cause>>"); 2478 return; 2479 } 2480 } 2481 } 2482 2483 /** 2484 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 2485 */ 2486 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 2487 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected"); 2488 JavaValue result(T_VOID); 2489 JavaCalls::call_virtual(&result, 2490 throwable, 2491 vmClasses::Throwable_klass(), 2492 vmSymbols::printStackTrace_name(), 2493 vmSymbols::void_method_signature(), 2494 THREAD); 2495 } 2496 2497 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 2498 if (!StackTraceInThrowable) return; 2499 ResourceMark rm(THREAD); 2500 2501 // Start out by clearing the backtrace for this object, in case the VM 2502 // runs out of memory while allocating the stack trace 2503 set_backtrace(throwable(), nullptr); 2504 // Clear lazily constructed Java level stacktrace if refilling occurs 2505 // This is unnecessary in 1.7+ but harmless 2506 clear_stacktrace(throwable()); 2507 2508 int max_depth = MaxJavaStackTraceDepth; 2509 JavaThread* thread = THREAD; 2510 2511 BacktraceBuilder bt(CHECK); 2512 2513 // If there is no Java frame just return the method that was being called 2514 // with bci 0 2515 if (!thread->has_last_Java_frame()) { 2516 if (max_depth >= 1 && method() != nullptr) { 2517 bt.push(method(), 0, CHECK); 2518 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 2519 set_depth(throwable(), 1); 2520 set_backtrace(throwable(), bt.backtrace()); 2521 } 2522 return; 2523 } 2524 2525 // Instead of using vframe directly, this version of fill_in_stack_trace 2526 // basically handles everything by hand. This significantly improved the 2527 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 2528 // See bug 6333838 for more details. 2529 // The "ASSERT" here is to verify this method generates the exactly same stack 2530 // trace as utilizing vframe. 2531 #ifdef ASSERT 2532 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */); 2533 #endif 2534 int total_count = 0; 2535 RegisterMap map(thread, 2536 RegisterMap::UpdateMap::skip, 2537 RegisterMap::ProcessFrames::skip, 2538 RegisterMap::WalkContinuation::include); 2539 int decode_offset = 0; 2540 CompiledMethod* nm = nullptr; 2541 bool skip_fillInStackTrace_check = false; 2542 bool skip_throwableInit_check = false; 2543 bool skip_hidden = !ShowHiddenFrames; 2544 bool show_carrier = ShowCarrierFrames; 2545 ContinuationEntry* cont_entry = thread->last_continuation(); 2546 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 2547 Method* method = nullptr; 2548 int bci = 0; 2549 2550 // Compiled java method case. 2551 if (decode_offset != 0) { 2552 DebugInfoReadStream stream(nm, decode_offset); 2553 decode_offset = stream.read_int(); 2554 method = (Method*)nm->metadata_at(stream.read_int()); 2555 bci = stream.read_bci(); 2556 } else { 2557 if (fr.is_first_frame()) break; 2558 2559 if (Continuation::is_continuation_enterSpecial(fr)) { 2560 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), ""); 2561 if (!show_carrier && cont_entry->is_virtual_thread()) { 2562 break; 2563 } 2564 cont_entry = cont_entry->parent(); 2565 } 2566 2567 address pc = fr.pc(); 2568 if (fr.is_interpreted_frame()) { 2569 address bcp; 2570 if (!map.in_cont()) { 2571 bcp = fr.interpreter_frame_bcp(); 2572 method = fr.interpreter_frame_method(); 2573 } else { 2574 bcp = map.stack_chunk()->interpreter_frame_bcp(fr); 2575 method = map.stack_chunk()->interpreter_frame_method(fr); 2576 } 2577 bci = method->bci_from(bcp); 2578 fr = fr.sender(&map); 2579 } else { 2580 CodeBlob* cb = fr.cb(); 2581 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null 2582 // but non nmethod 2583 fr = fr.sender(&map); 2584 if (cb == nullptr || !cb->is_compiled()) { 2585 continue; 2586 } 2587 nm = cb->as_compiled_method(); 2588 assert(nm->method() != nullptr, "must be"); 2589 if (nm->method()->is_native()) { 2590 method = nm->method(); 2591 bci = 0; 2592 } else { 2593 PcDesc* pd = nm->pc_desc_at(pc); 2594 decode_offset = pd->scope_decode_offset(); 2595 // if decode_offset is not equal to 0, it will execute the 2596 // "compiled java method case" at the beginning of the loop. 2597 continue; 2598 } 2599 } 2600 } 2601 #ifdef ASSERT 2602 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace 2603 assert(st.method() == method && st.bci() == bci, "Wrong stack trace"); 2604 st.next(); 2605 } 2606 #endif 2607 2608 // the format of the stacktrace will be: 2609 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2610 // - 0 or more <init> methods for the exception class (skipped) 2611 // - rest of the stack 2612 2613 if (!skip_fillInStackTrace_check) { 2614 if (method->name() == vmSymbols::fillInStackTrace_name() && 2615 throwable->is_a(method->method_holder())) { 2616 continue; 2617 } 2618 else { 2619 skip_fillInStackTrace_check = true; // gone past them all 2620 } 2621 } 2622 if (!skip_throwableInit_check) { 2623 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2624 2625 // skip <init> methods of the exception class and superclasses 2626 // This is similar to classic VM. 2627 if (method->name() == vmSymbols::object_initializer_name() && 2628 throwable->is_a(method->method_holder())) { 2629 continue; 2630 } else { 2631 // there are none or we've seen them all - either way stop checking 2632 skip_throwableInit_check = true; 2633 } 2634 } 2635 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) { 2636 if (skip_hidden) { 2637 if (total_count == 0) { 2638 // The top frame will be hidden from the stack trace. 2639 bt.set_has_hidden_top_frame(); 2640 } 2641 continue; 2642 } 2643 } 2644 2645 bt.push(method, bci, CHECK); 2646 total_count++; 2647 } 2648 2649 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2650 2651 // Put completed stack trace into throwable object 2652 set_backtrace(throwable(), bt.backtrace()); 2653 set_depth(throwable(), total_count); 2654 } 2655 2656 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2657 // No-op if stack trace is disabled 2658 if (!StackTraceInThrowable) { 2659 return; 2660 } 2661 2662 // Disable stack traces for some preallocated out of memory errors 2663 if (!Universe::should_fill_in_stack_trace(throwable)) { 2664 return; 2665 } 2666 2667 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2668 PreserveExceptionMark pm(THREAD); 2669 2670 fill_in_stack_trace(throwable, method, THREAD); 2671 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the 2672 // original exception via the PreserveExceptionMark destructor. 2673 CLEAR_PENDING_EXCEPTION; 2674 } 2675 2676 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2677 // Allocate stack trace - backtrace is created but not filled in 2678 2679 // No-op if stack trace is disabled 2680 if (!StackTraceInThrowable) return; 2681 BacktraceBuilder bt(CHECK); // creates a backtrace 2682 set_backtrace(throwable(), bt.backtrace()); 2683 } 2684 2685 2686 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2687 // Fill in stack trace into preallocated backtrace (no GC) 2688 2689 // No-op if stack trace is disabled 2690 if (!StackTraceInThrowable) return; 2691 2692 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check"); 2693 2694 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2695 2696 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2697 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2698 2699 ResourceMark rm(THREAD); 2700 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */); 2701 2702 BacktraceBuilder bt(THREAD, backtrace); 2703 2704 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2705 // methods as preallocated errors aren't created by "java" code. 2706 2707 // fill in as much stack trace as possible 2708 int chunk_count = 0; 2709 for (;!st.at_end(); st.next()) { 2710 bt.push(st.method(), st.bci(), CHECK); 2711 chunk_count++; 2712 2713 // Bail-out for deep stacks 2714 if (chunk_count >= trace_chunk_size) break; 2715 } 2716 set_depth(throwable(), chunk_count); 2717 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2718 2719 // We support the Throwable immutability protocol defined for Java 7. 2720 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2721 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized"); 2722 } 2723 2724 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace, 2725 objArrayHandle stack_trace_array_h, TRAPS) { 2726 2727 if (backtrace.is_null() || stack_trace_array_h.is_null()) { 2728 THROW(vmSymbols::java_lang_NullPointerException()); 2729 } 2730 2731 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2732 2733 if (stack_trace_array_h->length() != depth) { 2734 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2735 } 2736 2737 objArrayHandle result(THREAD, objArrayOop(backtrace())); 2738 BacktraceIterator iter(result, THREAD); 2739 2740 int index = 0; 2741 while (iter.repeat()) { 2742 BacktraceElement bte = iter.next(THREAD); 2743 2744 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2745 2746 if (stack_trace_element.is_null()) { 2747 THROW(vmSymbols::java_lang_NullPointerException()); 2748 } 2749 2750 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2751 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2752 2753 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2754 method, 2755 bte._version, 2756 bte._bci, 2757 bte._name, 2758 CHECK); 2759 } 2760 } 2761 2762 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) { 2763 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization 2764 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive 2765 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and 2766 // symbolic stacktrace of 'throwable'. 2767 assert(throwable.not_null(), "shouldn't be"); 2768 2769 // Now create the message from the original exception and thread name. 2770 ResourceMark rm(current); 2771 const char *message = nullptr; 2772 oop detailed_message = java_lang_Throwable::message(throwable()); 2773 if (detailed_message != nullptr) { 2774 message = java_lang_String::as_utf8_string(detailed_message); 2775 } 2776 stringStream st; 2777 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(), 2778 message == nullptr ? "" : ":"); 2779 if (message == nullptr) { 2780 st.print("[in thread \"%s\"]", current->name()); 2781 } else { 2782 st.print("%s [in thread \"%s\"]", message, current->name()); 2783 } 2784 2785 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError(); 2786 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string()); 2787 // If new_exception returns a different exception while creating the exception, 2788 // abandon the attempt to save the initialization error and return null. 2789 if (init_error->klass()->name() != exception_name) { 2790 log_info(class, init)("Exception %s thrown while saving initialization exception", 2791 init_error->klass()->external_name()); 2792 return Handle(); 2793 } 2794 2795 // Call to java to fill in the stack trace and clear declaringClassObject to 2796 // not keep classes alive in the stack trace. 2797 // call this: public StackTraceElement[] getStackTrace() 2798 JavaValue result(T_ARRAY); 2799 JavaCalls::call_virtual(&result, throwable, 2800 vmClasses::Throwable_klass(), 2801 vmSymbols::getStackTrace_name(), 2802 vmSymbols::getStackTrace_signature(), 2803 current); 2804 if (!current->has_pending_exception()){ 2805 Handle stack_trace(current, result.get_oop()); 2806 assert(stack_trace->is_objArray(), "Should be an array"); 2807 java_lang_Throwable::set_stacktrace(init_error(), stack_trace()); 2808 // Clear backtrace because the stacktrace should be used instead. 2809 set_backtrace(init_error(), nullptr); 2810 } else { 2811 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s", 2812 init_error->klass()->external_name()); 2813 current->clear_pending_exception(); 2814 } 2815 2816 return init_error; 2817 } 2818 2819 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) { 2820 JavaThread* current = JavaThread::current(); 2821 objArrayHandle result(current, objArrayOop(backtrace(throwable))); 2822 BacktraceIterator iter(result, current); 2823 // No backtrace available. 2824 if (!iter.repeat()) return false; 2825 2826 // If the exception happened in a frame that has been hidden, i.e., 2827 // omitted from the back trace, we can not compute the message. 2828 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset); 2829 if (hidden != nullptr) { 2830 return false; 2831 } 2832 2833 // Get first backtrace element. 2834 BacktraceElement bte = iter.next(current); 2835 2836 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2837 assert(holder != nullptr, "first element should be non-null"); 2838 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version); 2839 2840 // Original version is no longer available. 2841 if (m == nullptr || !version_matches(m, bte._version)) { 2842 return false; 2843 } 2844 2845 *method = m; 2846 *bci = bte._bci; 2847 return true; 2848 } 2849 2850 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2851 // Allocate java.lang.StackTraceElement instance 2852 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 2853 assert(k != nullptr, "must be loaded in 1.4+"); 2854 if (k->should_be_initialized()) { 2855 k->initialize(CHECK_NULL); 2856 } 2857 2858 Handle element = k->allocate_instance_handle(CHECK_NULL); 2859 2860 int version = method->constants()->version(); 2861 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL); 2862 return element(); 2863 } 2864 2865 void java_lang_StackTraceElement::fill_in(Handle element, 2866 InstanceKlass* holder, const methodHandle& method, 2867 int version, int bci, Symbol* name, TRAPS) { 2868 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check"); 2869 2870 ResourceMark rm(THREAD); 2871 HandleMark hm(THREAD); 2872 2873 // Fill in class name 2874 Handle java_class(THREAD, holder->java_mirror()); 2875 oop classname = java_lang_Class::name(java_class, CHECK); 2876 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2877 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class()); 2878 2879 oop loader = holder->class_loader(); 2880 if (loader != nullptr) { 2881 oop loader_name = java_lang_ClassLoader::name(loader); 2882 if (loader_name != nullptr) 2883 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2884 } 2885 2886 // Fill in method name 2887 oop methodname = StringTable::intern(name, CHECK); 2888 java_lang_StackTraceElement::set_methodName(element(), methodname); 2889 2890 // Fill in module name and version 2891 ModuleEntry* module = holder->module(); 2892 if (module->is_named()) { 2893 oop module_name = StringTable::intern(module->name(), CHECK); 2894 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2895 oop module_version; 2896 if (module->version() != nullptr) { 2897 module_version = StringTable::intern(module->version(), CHECK); 2898 } else { 2899 module_version = nullptr; 2900 } 2901 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2902 } 2903 2904 if (method() == nullptr || !version_matches(method(), version)) { 2905 // The method was redefined, accurate line number information isn't available 2906 java_lang_StackTraceElement::set_fileName(element(), nullptr); 2907 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2908 } else { 2909 Symbol* source; 2910 oop source_file; 2911 int line_number; 2912 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK); 2913 2914 java_lang_StackTraceElement::set_fileName(element(), source_file); 2915 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2916 } 2917 } 2918 2919 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class, 2920 InstanceKlass* holder, 2921 int version, 2922 const methodHandle& method, 2923 int bci, 2924 Symbol*& source, 2925 oop& source_file, 2926 int& line_number, TRAPS) { 2927 // Fill in source file name and line number. 2928 source = Backtrace::get_source_file_name(holder, version); 2929 source_file = java_lang_Class::source_file(java_class()); 2930 if (source != nullptr) { 2931 // Class was not redefined. We can trust its cache if set, 2932 // else we have to initialize it. 2933 if (source_file == nullptr) { 2934 source_file = StringTable::intern(source, CHECK); 2935 java_lang_Class::set_source_file(java_class(), source_file); 2936 } 2937 } else { 2938 // Class was redefined. Dump the cache if it was set. 2939 if (source_file != nullptr) { 2940 source_file = nullptr; 2941 java_lang_Class::set_source_file(java_class(), source_file); 2942 } 2943 } 2944 line_number = Backtrace::get_line_number(method(), bci); 2945 } 2946 2947 #if INCLUDE_JVMCI 2948 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci, 2949 Symbol*& filename, int& line_number, TRAPS) { 2950 ResourceMark rm(THREAD); 2951 HandleMark hm(THREAD); 2952 2953 filename = nullptr; 2954 line_number = -1; 2955 2956 oop source_file; 2957 int version = method->constants()->version(); 2958 InstanceKlass* holder = method->method_holder(); 2959 Handle java_class(THREAD, holder->java_mirror()); 2960 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK); 2961 } 2962 #endif // INCLUDE_JVMCI 2963 2964 // java_lang_ClassFrameInfo 2965 2966 int java_lang_ClassFrameInfo::_classOrMemberName_offset; 2967 int java_lang_ClassFrameInfo::_flags_offset; 2968 2969 #define CLASSFRAMEINFO_FIELDS_DO(macro) \ 2970 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \ 2971 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false) 2972 2973 void java_lang_ClassFrameInfo::compute_offsets() { 2974 InstanceKlass* k = vmClasses::ClassFrameInfo_klass(); 2975 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2976 } 2977 2978 #if INCLUDE_CDS 2979 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) { 2980 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2981 } 2982 #endif 2983 2984 static int get_flags(const methodHandle& m) { 2985 int flags = (jushort)( m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS ); 2986 if (m->is_initializer()) { 2987 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR; 2988 } else { 2989 flags |= java_lang_invoke_MemberName::MN_IS_METHOD; 2990 } 2991 if (m->caller_sensitive()) { 2992 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE; 2993 } 2994 if (m->is_hidden()) { 2995 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER; 2996 } 2997 assert((flags & 0xFF000000) == 0, "unexpected flags"); 2998 return flags; 2999 } 3000 3001 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) { 3002 return obj->obj_field(_classOrMemberName_offset); 3003 } 3004 3005 int java_lang_ClassFrameInfo::flags(oop obj) { 3006 return obj->int_field(_flags_offset); 3007 } 3008 3009 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) { 3010 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror()); 3011 // flags is initialized when ClassFrameInfo object is constructed and retain the value 3012 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m); 3013 stackFrame->int_field_put(_flags_offset, flags); 3014 } 3015 3016 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) { 3017 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK); 3018 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name); 3019 // flags is initialized when ClassFrameInfo object is constructed and retain the value 3020 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m); 3021 stackFrame->int_field_put(_flags_offset, flags); 3022 } 3023 3024 3025 // java_lang_StackFrameInfo 3026 3027 int java_lang_StackFrameInfo::_type_offset; 3028 int java_lang_StackFrameInfo::_name_offset; 3029 int java_lang_StackFrameInfo::_bci_offset; 3030 int java_lang_StackFrameInfo::_version_offset; 3031 int java_lang_StackFrameInfo::_contScope_offset; 3032 3033 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 3034 macro(_type_offset, k, "type", object_signature, false); \ 3035 macro(_name_offset, k, "name", string_signature, false); \ 3036 macro(_bci_offset, k, "bci", int_signature, false); \ 3037 macro(_contScope_offset, k, "contScope", continuationscope_signature, false) 3038 3039 void java_lang_StackFrameInfo::compute_offsets() { 3040 InstanceKlass* k = vmClasses::StackFrameInfo_klass(); 3041 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3042 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3043 } 3044 3045 #if INCLUDE_CDS 3046 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) { 3047 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3048 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3049 } 3050 #endif 3051 3052 Method* java_lang_StackFrameInfo::get_method(oop obj) { 3053 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj); 3054 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m); 3055 return method; 3056 } 3057 3058 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) { 3059 // set Method* or mid/cpref 3060 HandleMark hm(THREAD); 3061 Handle cont_h(THREAD, cont); 3062 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK); 3063 3064 // set bci 3065 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 3066 // method may be redefined; store the version 3067 int version = method->constants()->version(); 3068 assert((jushort)version == version, "version should be short"); 3069 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 3070 3071 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr; 3072 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope); 3073 } 3074 3075 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 3076 ResourceMark rm(THREAD); 3077 HandleMark hm(THREAD); 3078 3079 Method* method = java_lang_StackFrameInfo::get_method(stackFrame()); 3080 InstanceKlass* holder = method->method_holder(); 3081 short version = stackFrame->short_field(_version_offset); 3082 int bci = stackFrame->int_field(_bci_offset); 3083 Symbol* name = method->name(); 3084 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK); 3085 } 3086 3087 oop java_lang_StackFrameInfo::type(oop obj) { 3088 return obj->obj_field(_type_offset); 3089 } 3090 3091 void java_lang_StackFrameInfo::set_type(oop obj, oop value) { 3092 obj->obj_field_put(_type_offset, value); 3093 } 3094 3095 oop java_lang_StackFrameInfo::name(oop obj) { 3096 return obj->obj_field(_name_offset); 3097 } 3098 3099 void java_lang_StackFrameInfo::set_name(oop obj, oop value) { 3100 obj->obj_field_put(_name_offset, value); 3101 } 3102 3103 void java_lang_StackFrameInfo::set_version(oop obj, short value) { 3104 obj->short_field_put(_version_offset, value); 3105 } 3106 3107 void java_lang_StackFrameInfo::set_bci(oop obj, int value) { 3108 assert(value >= 0 && value < max_jushort, "must be a valid bci value"); 3109 obj->int_field_put(_bci_offset, value); 3110 } 3111 3112 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) { 3113 obj->obj_field_put(_contScope_offset, value); 3114 } 3115 3116 int java_lang_LiveStackFrameInfo::_monitors_offset; 3117 int java_lang_LiveStackFrameInfo::_locals_offset; 3118 int java_lang_LiveStackFrameInfo::_operands_offset; 3119 int java_lang_LiveStackFrameInfo::_mode_offset; 3120 3121 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 3122 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 3123 macro(_locals_offset, k, "locals", object_array_signature, false); \ 3124 macro(_operands_offset, k, "operands", object_array_signature, false); \ 3125 macro(_mode_offset, k, "mode", int_signature, false) 3126 3127 void java_lang_LiveStackFrameInfo::compute_offsets() { 3128 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass(); 3129 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3130 } 3131 3132 #if INCLUDE_CDS 3133 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) { 3134 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3135 } 3136 #endif 3137 3138 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) { 3139 obj->obj_field_put(_monitors_offset, value); 3140 } 3141 3142 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) { 3143 obj->obj_field_put(_locals_offset, value); 3144 } 3145 3146 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) { 3147 obj->obj_field_put(_operands_offset, value); 3148 } 3149 3150 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) { 3151 obj->int_field_put(_mode_offset, value); 3152 } 3153 3154 3155 // java_lang_AccessibleObject 3156 3157 int java_lang_reflect_AccessibleObject::_override_offset; 3158 3159 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 3160 macro(_override_offset, k, "override", bool_signature, false) 3161 3162 void java_lang_reflect_AccessibleObject::compute_offsets() { 3163 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass(); 3164 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3165 } 3166 3167 #if INCLUDE_CDS 3168 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) { 3169 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3170 } 3171 #endif 3172 3173 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 3174 return (jboolean) reflect->bool_field(_override_offset); 3175 } 3176 3177 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 3178 reflect->bool_field_put(_override_offset, (int) value); 3179 } 3180 3181 // java_lang_reflect_Method 3182 3183 int java_lang_reflect_Method::_clazz_offset; 3184 int java_lang_reflect_Method::_name_offset; 3185 int java_lang_reflect_Method::_returnType_offset; 3186 int java_lang_reflect_Method::_parameterTypes_offset; 3187 int java_lang_reflect_Method::_exceptionTypes_offset; 3188 int java_lang_reflect_Method::_slot_offset; 3189 int java_lang_reflect_Method::_modifiers_offset; 3190 int java_lang_reflect_Method::_signature_offset; 3191 int java_lang_reflect_Method::_annotations_offset; 3192 int java_lang_reflect_Method::_parameter_annotations_offset; 3193 int java_lang_reflect_Method::_annotation_default_offset; 3194 3195 #define METHOD_FIELDS_DO(macro) \ 3196 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3197 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3198 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 3199 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 3200 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 3201 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3202 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3203 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3204 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 3205 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \ 3206 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false); 3207 3208 void java_lang_reflect_Method::compute_offsets() { 3209 InstanceKlass* k = vmClasses::reflect_Method_klass(); 3210 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3211 } 3212 3213 #if INCLUDE_CDS 3214 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) { 3215 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3216 } 3217 #endif 3218 3219 Handle java_lang_reflect_Method::create(TRAPS) { 3220 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3221 Klass* klass = vmClasses::reflect_Method_klass(); 3222 // This class is eagerly initialized during VM initialization, since we keep a reference 3223 // to one of the methods 3224 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 3225 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 3226 } 3227 3228 oop java_lang_reflect_Method::clazz(oop reflect) { 3229 return reflect->obj_field(_clazz_offset); 3230 } 3231 3232 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 3233 reflect->obj_field_put(_clazz_offset, value); 3234 } 3235 3236 int java_lang_reflect_Method::slot(oop reflect) { 3237 return reflect->int_field(_slot_offset); 3238 } 3239 3240 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 3241 reflect->int_field_put(_slot_offset, value); 3242 } 3243 3244 void java_lang_reflect_Method::set_name(oop method, oop value) { 3245 method->obj_field_put(_name_offset, value); 3246 } 3247 3248 oop java_lang_reflect_Method::return_type(oop method) { 3249 return method->obj_field(_returnType_offset); 3250 } 3251 3252 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 3253 method->obj_field_put(_returnType_offset, value); 3254 } 3255 3256 oop java_lang_reflect_Method::parameter_types(oop method) { 3257 return method->obj_field(_parameterTypes_offset); 3258 } 3259 3260 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 3261 method->obj_field_put(_parameterTypes_offset, value); 3262 } 3263 3264 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 3265 method->obj_field_put(_exceptionTypes_offset, value); 3266 } 3267 3268 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 3269 method->int_field_put(_modifiers_offset, value); 3270 } 3271 3272 void java_lang_reflect_Method::set_signature(oop method, oop value) { 3273 method->obj_field_put(_signature_offset, value); 3274 } 3275 3276 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 3277 method->obj_field_put(_annotations_offset, value); 3278 } 3279 3280 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 3281 method->obj_field_put(_parameter_annotations_offset, value); 3282 } 3283 3284 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 3285 method->obj_field_put(_annotation_default_offset, value); 3286 } 3287 3288 int java_lang_reflect_Constructor::_clazz_offset; 3289 int java_lang_reflect_Constructor::_parameterTypes_offset; 3290 int java_lang_reflect_Constructor::_exceptionTypes_offset; 3291 int java_lang_reflect_Constructor::_slot_offset; 3292 int java_lang_reflect_Constructor::_modifiers_offset; 3293 int java_lang_reflect_Constructor::_signature_offset; 3294 int java_lang_reflect_Constructor::_annotations_offset; 3295 int java_lang_reflect_Constructor::_parameter_annotations_offset; 3296 3297 #define CONSTRUCTOR_FIELDS_DO(macro) \ 3298 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3299 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 3300 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 3301 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3302 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3303 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3304 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 3305 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); 3306 3307 void java_lang_reflect_Constructor::compute_offsets() { 3308 InstanceKlass* k = vmClasses::reflect_Constructor_klass(); 3309 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3310 } 3311 3312 #if INCLUDE_CDS 3313 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) { 3314 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3315 } 3316 #endif 3317 3318 Handle java_lang_reflect_Constructor::create(TRAPS) { 3319 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3320 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 3321 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3322 InstanceKlass* ik = InstanceKlass::cast(k); 3323 // Ensure it is initialized 3324 ik->initialize(CHECK_NH); 3325 return ik->allocate_instance_handle(THREAD); 3326 } 3327 3328 oop java_lang_reflect_Constructor::clazz(oop reflect) { 3329 return reflect->obj_field(_clazz_offset); 3330 } 3331 3332 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 3333 reflect->obj_field_put(_clazz_offset, value); 3334 } 3335 3336 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 3337 return constructor->obj_field(_parameterTypes_offset); 3338 } 3339 3340 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 3341 constructor->obj_field_put(_parameterTypes_offset, value); 3342 } 3343 3344 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 3345 constructor->obj_field_put(_exceptionTypes_offset, value); 3346 } 3347 3348 int java_lang_reflect_Constructor::slot(oop reflect) { 3349 return reflect->int_field(_slot_offset); 3350 } 3351 3352 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 3353 reflect->int_field_put(_slot_offset, value); 3354 } 3355 3356 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 3357 constructor->int_field_put(_modifiers_offset, value); 3358 } 3359 3360 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 3361 constructor->obj_field_put(_signature_offset, value); 3362 } 3363 3364 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 3365 constructor->obj_field_put(_annotations_offset, value); 3366 } 3367 3368 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 3369 method->obj_field_put(_parameter_annotations_offset, value); 3370 } 3371 3372 int java_lang_reflect_Field::_clazz_offset; 3373 int java_lang_reflect_Field::_name_offset; 3374 int java_lang_reflect_Field::_type_offset; 3375 int java_lang_reflect_Field::_slot_offset; 3376 int java_lang_reflect_Field::_modifiers_offset; 3377 int java_lang_reflect_Field::_trusted_final_offset; 3378 int java_lang_reflect_Field::_signature_offset; 3379 int java_lang_reflect_Field::_annotations_offset; 3380 3381 #define FIELD_FIELDS_DO(macro) \ 3382 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3383 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3384 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \ 3385 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3386 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3387 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \ 3388 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3389 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); 3390 3391 void java_lang_reflect_Field::compute_offsets() { 3392 InstanceKlass* k = vmClasses::reflect_Field_klass(); 3393 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3394 } 3395 3396 #if INCLUDE_CDS 3397 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) { 3398 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3399 } 3400 #endif 3401 3402 Handle java_lang_reflect_Field::create(TRAPS) { 3403 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3404 Symbol* name = vmSymbols::java_lang_reflect_Field(); 3405 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3406 InstanceKlass* ik = InstanceKlass::cast(k); 3407 // Ensure it is initialized 3408 ik->initialize(CHECK_NH); 3409 return ik->allocate_instance_handle(THREAD); 3410 } 3411 3412 oop java_lang_reflect_Field::clazz(oop reflect) { 3413 return reflect->obj_field(_clazz_offset); 3414 } 3415 3416 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 3417 reflect->obj_field_put(_clazz_offset, value); 3418 } 3419 3420 oop java_lang_reflect_Field::name(oop field) { 3421 return field->obj_field(_name_offset); 3422 } 3423 3424 void java_lang_reflect_Field::set_name(oop field, oop value) { 3425 field->obj_field_put(_name_offset, value); 3426 } 3427 3428 oop java_lang_reflect_Field::type(oop field) { 3429 return field->obj_field(_type_offset); 3430 } 3431 3432 void java_lang_reflect_Field::set_type(oop field, oop value) { 3433 field->obj_field_put(_type_offset, value); 3434 } 3435 3436 int java_lang_reflect_Field::slot(oop reflect) { 3437 return reflect->int_field(_slot_offset); 3438 } 3439 3440 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 3441 reflect->int_field_put(_slot_offset, value); 3442 } 3443 3444 int java_lang_reflect_Field::modifiers(oop field) { 3445 return field->int_field(_modifiers_offset); 3446 } 3447 3448 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 3449 field->int_field_put(_modifiers_offset, value); 3450 } 3451 3452 void java_lang_reflect_Field::set_trusted_final(oop field) { 3453 field->bool_field_put(_trusted_final_offset, true); 3454 } 3455 3456 void java_lang_reflect_Field::set_signature(oop field, oop value) { 3457 field->obj_field_put(_signature_offset, value); 3458 } 3459 3460 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 3461 field->obj_field_put(_annotations_offset, value); 3462 } 3463 3464 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) { 3465 // Allocate java.lang.reflect.RecordComponent instance 3466 HandleMark hm(THREAD); 3467 InstanceKlass* ik = vmClasses::RecordComponent_klass(); 3468 assert(ik != nullptr, "must be loaded"); 3469 ik->initialize(CHECK_NULL); 3470 3471 Handle element = ik->allocate_instance_handle(CHECK_NULL); 3472 3473 Handle decl_class(THREAD, holder->java_mirror()); 3474 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class()); 3475 3476 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8 3477 oop component_name = StringTable::intern(name, CHECK_NULL); 3478 java_lang_reflect_RecordComponent::set_name(element(), component_name); 3479 3480 Symbol* type = holder->constants()->symbol_at(component->descriptor_index()); 3481 Handle component_type_h = 3482 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL); 3483 java_lang_reflect_RecordComponent::set_type(element(), component_type_h()); 3484 3485 Method* accessor_method = nullptr; 3486 { 3487 // Prepend "()" to type to create the full method signature. 3488 ResourceMark rm(THREAD); 3489 int sig_len = type->utf8_length() + 3; // "()" and null char 3490 char* sig = NEW_RESOURCE_ARRAY(char, sig_len); 3491 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string()); 3492 TempNewSymbol full_sig = SymbolTable::new_symbol(sig); 3493 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find); 3494 } 3495 3496 if (accessor_method != nullptr) { 3497 methodHandle method(THREAD, accessor_method); 3498 oop m = Reflection::new_method(method, false, CHECK_NULL); 3499 java_lang_reflect_RecordComponent::set_accessor(element(), m); 3500 } else { 3501 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr); 3502 } 3503 3504 int sig_index = component->generic_signature_index(); 3505 if (sig_index > 0) { 3506 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8 3507 oop component_sig = StringTable::intern(sig, CHECK_NULL); 3508 java_lang_reflect_RecordComponent::set_signature(element(), component_sig); 3509 } else { 3510 java_lang_reflect_RecordComponent::set_signature(element(), nullptr); 3511 } 3512 3513 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL); 3514 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop); 3515 3516 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL); 3517 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop); 3518 3519 return element(); 3520 } 3521 3522 int reflect_ConstantPool::_oop_offset; 3523 3524 #define CONSTANTPOOL_FIELDS_DO(macro) \ 3525 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 3526 3527 void reflect_ConstantPool::compute_offsets() { 3528 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass(); 3529 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3530 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3531 } 3532 3533 #if INCLUDE_CDS 3534 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) { 3535 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3536 } 3537 #endif 3538 3539 int java_lang_reflect_Parameter::_name_offset; 3540 int java_lang_reflect_Parameter::_modifiers_offset; 3541 int java_lang_reflect_Parameter::_index_offset; 3542 int java_lang_reflect_Parameter::_executable_offset; 3543 3544 #define PARAMETER_FIELDS_DO(macro) \ 3545 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3546 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3547 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3548 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3549 3550 void java_lang_reflect_Parameter::compute_offsets() { 3551 InstanceKlass* k = vmClasses::reflect_Parameter_klass(); 3552 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3553 } 3554 3555 #if INCLUDE_CDS 3556 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) { 3557 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3558 } 3559 #endif 3560 3561 Handle java_lang_reflect_Parameter::create(TRAPS) { 3562 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3563 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3564 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3565 InstanceKlass* ik = InstanceKlass::cast(k); 3566 // Ensure it is initialized 3567 ik->initialize(CHECK_NH); 3568 return ik->allocate_instance_handle(THREAD); 3569 } 3570 3571 oop java_lang_reflect_Parameter::name(oop param) { 3572 return param->obj_field(_name_offset); 3573 } 3574 3575 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3576 param->obj_field_put(_name_offset, value); 3577 } 3578 3579 int java_lang_reflect_Parameter::modifiers(oop param) { 3580 return param->int_field(_modifiers_offset); 3581 } 3582 3583 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3584 param->int_field_put(_modifiers_offset, value); 3585 } 3586 3587 int java_lang_reflect_Parameter::index(oop param) { 3588 return param->int_field(_index_offset); 3589 } 3590 3591 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3592 param->int_field_put(_index_offset, value); 3593 } 3594 3595 oop java_lang_reflect_Parameter::executable(oop param) { 3596 return param->obj_field(_executable_offset); 3597 } 3598 3599 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3600 param->obj_field_put(_executable_offset, value); 3601 } 3602 3603 // java_lang_Module 3604 3605 int java_lang_Module::_loader_offset; 3606 int java_lang_Module::_name_offset; 3607 int java_lang_Module::_module_entry_offset; 3608 3609 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3610 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3611 return JavaCalls::construct_new_instance(vmClasses::Module_klass(), 3612 vmSymbols::java_lang_module_init_signature(), 3613 loader, module_name, CHECK_NH); 3614 } 3615 3616 #define MODULE_FIELDS_DO(macro) \ 3617 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3618 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false) 3619 3620 void java_lang_Module::compute_offsets() { 3621 InstanceKlass* k = vmClasses::Module_klass(); 3622 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3623 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3624 } 3625 3626 #if INCLUDE_CDS 3627 void java_lang_Module::serialize_offsets(SerializeClosure* f) { 3628 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3629 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3630 } 3631 #endif 3632 3633 oop java_lang_Module::loader(oop module) { 3634 return module->obj_field(_loader_offset); 3635 } 3636 3637 void java_lang_Module::set_loader(oop module, oop value) { 3638 module->obj_field_put(_loader_offset, value); 3639 } 3640 3641 oop java_lang_Module::name(oop module) { 3642 return module->obj_field(_name_offset); 3643 } 3644 3645 void java_lang_Module::set_name(oop module, oop value) { 3646 module->obj_field_put(_name_offset, value); 3647 } 3648 3649 ModuleEntry* java_lang_Module::module_entry_raw(oop module) { 3650 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 3651 assert(module != nullptr, "module can't be null"); 3652 assert(oopDesc::is_oop(module), "module must be oop"); 3653 3654 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3655 return module_entry; 3656 } 3657 3658 ModuleEntry* java_lang_Module::module_entry(oop module) { 3659 ModuleEntry* module_entry = module_entry_raw(module); 3660 if (module_entry == nullptr) { 3661 // If the inject field containing the ModuleEntry* is null then return the 3662 // class loader's unnamed module. 3663 oop loader = java_lang_Module::loader(module); 3664 Handle h_loader = Handle(Thread::current(), loader); 3665 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3666 return loader_cld->unnamed_module(); 3667 } 3668 return module_entry; 3669 } 3670 3671 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3672 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 3673 assert(module != nullptr, "module can't be null"); 3674 assert(oopDesc::is_oop(module), "module must be oop"); 3675 module->address_field_put(_module_entry_offset, (address)module_entry); 3676 } 3677 3678 Handle reflect_ConstantPool::create(TRAPS) { 3679 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3680 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass(); 3681 // Ensure it is initialized 3682 k->initialize(CHECK_NH); 3683 return k->allocate_instance_handle(THREAD); 3684 } 3685 3686 3687 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3688 oop mirror = value->pool_holder()->java_mirror(); 3689 // Save the mirror to get back the constant pool. 3690 reflect->obj_field_put(_oop_offset, mirror); 3691 } 3692 3693 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3694 3695 oop mirror = reflect->obj_field(_oop_offset); 3696 Klass* k = java_lang_Class::as_Klass(mirror); 3697 assert(k->is_instance_klass(), "Must be"); 3698 3699 // Get the constant pool back from the klass. Since class redefinition 3700 // merges the new constant pool into the old, this is essentially the 3701 // same constant pool as the original. If constant pool merging is 3702 // no longer done in the future, this will have to change to save 3703 // the original. 3704 return InstanceKlass::cast(k)->constants(); 3705 } 3706 3707 3708 // Support for java_lang_ref_Reference 3709 3710 bool java_lang_ref_Reference::_offsets_initialized; 3711 3712 int java_lang_ref_Reference::_referent_offset; 3713 int java_lang_ref_Reference::_queue_offset; 3714 int java_lang_ref_Reference::_next_offset; 3715 int java_lang_ref_Reference::_discovered_offset; 3716 3717 #define REFERENCE_FIELDS_DO(macro) \ 3718 macro(_referent_offset, k, "referent", object_signature, false); \ 3719 macro(_queue_offset, k, "queue", referencequeue_signature, false); \ 3720 macro(_next_offset, k, "next", reference_signature, false); \ 3721 macro(_discovered_offset, k, "discovered", reference_signature, false); 3722 3723 void java_lang_ref_Reference::compute_offsets() { 3724 if (_offsets_initialized) { 3725 return; 3726 } 3727 _offsets_initialized = true; 3728 InstanceKlass* k = vmClasses::Reference_klass(); 3729 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3730 } 3731 3732 #if INCLUDE_CDS 3733 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) { 3734 f->do_bool(&_offsets_initialized); 3735 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3736 } 3737 #endif 3738 3739 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3740 assert(obj != nullptr, "sanity"); 3741 if (offset != _referent_offset) { 3742 return false; 3743 } 3744 3745 Klass* k = obj->klass(); 3746 if (!k->is_instance_klass()) { 3747 return false; 3748 } 3749 3750 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3751 bool is_reference = ik->reference_type() != REF_NONE; 3752 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity"); 3753 return is_reference; 3754 } 3755 3756 int java_lang_boxing_object::_value_offset; 3757 int java_lang_boxing_object::_long_value_offset; 3758 3759 #define BOXING_FIELDS_DO(macro) \ 3760 macro(_value_offset, integerKlass, "value", int_signature, false); \ 3761 macro(_long_value_offset, longKlass, "value", long_signature, false); 3762 3763 void java_lang_boxing_object::compute_offsets() { 3764 InstanceKlass* integerKlass = vmClasses::Integer_klass(); 3765 InstanceKlass* longKlass = vmClasses::Long_klass(); 3766 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3767 } 3768 3769 #if INCLUDE_CDS 3770 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) { 3771 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3772 } 3773 #endif 3774 3775 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 3776 Klass* k = vmClasses::box_klass(type); 3777 if (k == nullptr) return nullptr; 3778 InstanceKlass* ik = InstanceKlass::cast(k); 3779 if (!ik->is_initialized()) { 3780 ik->initialize(CHECK_NULL); 3781 } 3782 return ik->allocate_instance(THREAD); 3783 } 3784 3785 3786 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 3787 oop box = initialize_and_allocate(type, CHECK_NULL); 3788 if (box == nullptr) return nullptr; 3789 switch (type) { 3790 case T_BOOLEAN: 3791 box->bool_field_put(_value_offset, value->z); 3792 break; 3793 case T_CHAR: 3794 box->char_field_put(_value_offset, value->c); 3795 break; 3796 case T_FLOAT: 3797 box->float_field_put(_value_offset, value->f); 3798 break; 3799 case T_DOUBLE: 3800 box->double_field_put(_long_value_offset, value->d); 3801 break; 3802 case T_BYTE: 3803 box->byte_field_put(_value_offset, value->b); 3804 break; 3805 case T_SHORT: 3806 box->short_field_put(_value_offset, value->s); 3807 break; 3808 case T_INT: 3809 box->int_field_put(_value_offset, value->i); 3810 break; 3811 case T_LONG: 3812 box->long_field_put(_long_value_offset, value->j); 3813 break; 3814 default: 3815 return nullptr; 3816 } 3817 return box; 3818 } 3819 3820 3821 BasicType java_lang_boxing_object::basic_type(oop box) { 3822 if (box == nullptr) return T_ILLEGAL; 3823 BasicType type = vmClasses::box_klass_type(box->klass()); 3824 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 3825 return T_ILLEGAL; 3826 return type; 3827 } 3828 3829 3830 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 3831 BasicType type = vmClasses::box_klass_type(box->klass()); 3832 switch (type) { 3833 case T_BOOLEAN: 3834 value->z = box->bool_field(_value_offset); 3835 break; 3836 case T_CHAR: 3837 value->c = box->char_field(_value_offset); 3838 break; 3839 case T_FLOAT: 3840 value->f = box->float_field(_value_offset); 3841 break; 3842 case T_DOUBLE: 3843 value->d = box->double_field(_long_value_offset); 3844 break; 3845 case T_BYTE: 3846 value->b = box->byte_field(_value_offset); 3847 break; 3848 case T_SHORT: 3849 value->s = box->short_field(_value_offset); 3850 break; 3851 case T_INT: 3852 value->i = box->int_field(_value_offset); 3853 break; 3854 case T_LONG: 3855 value->j = box->long_field(_long_value_offset); 3856 break; 3857 default: 3858 return T_ILLEGAL; 3859 } // end switch 3860 return type; 3861 } 3862 3863 3864 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3865 BasicType type = vmClasses::box_klass_type(box->klass()); 3866 switch (type) { 3867 case T_BOOLEAN: 3868 box->bool_field_put(_value_offset, value->z); 3869 break; 3870 case T_CHAR: 3871 box->char_field_put(_value_offset, value->c); 3872 break; 3873 case T_FLOAT: 3874 box->float_field_put(_value_offset, value->f); 3875 break; 3876 case T_DOUBLE: 3877 box->double_field_put(_long_value_offset, value->d); 3878 break; 3879 case T_BYTE: 3880 box->byte_field_put(_value_offset, value->b); 3881 break; 3882 case T_SHORT: 3883 box->short_field_put(_value_offset, value->s); 3884 break; 3885 case T_INT: 3886 box->int_field_put(_value_offset, value->i); 3887 break; 3888 case T_LONG: 3889 box->long_field_put(_long_value_offset, value->j); 3890 break; 3891 default: 3892 return T_ILLEGAL; 3893 } // end switch 3894 return type; 3895 } 3896 3897 3898 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3899 switch (type) { 3900 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3901 case T_CHAR: st->print("%d", value->c); break; 3902 case T_BYTE: st->print("%d", value->b); break; 3903 case T_SHORT: st->print("%d", value->s); break; 3904 case T_INT: st->print("%d", value->i); break; 3905 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 3906 case T_FLOAT: st->print("%f", value->f); break; 3907 case T_DOUBLE: st->print("%lf", value->d); break; 3908 default: st->print("type %d?", type); break; 3909 } 3910 } 3911 3912 3913 // Support for java_lang_ref_SoftReference 3914 // 3915 3916 int java_lang_ref_SoftReference::_timestamp_offset; 3917 int java_lang_ref_SoftReference::_static_clock_offset; 3918 3919 #define SOFTREFERENCE_FIELDS_DO(macro) \ 3920 macro(_timestamp_offset, k, "timestamp", long_signature, false); \ 3921 macro(_static_clock_offset, k, "clock", long_signature, true) 3922 3923 void java_lang_ref_SoftReference::compute_offsets() { 3924 InstanceKlass* k = vmClasses::SoftReference_klass(); 3925 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3926 } 3927 3928 #if INCLUDE_CDS 3929 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) { 3930 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3931 } 3932 #endif 3933 3934 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3935 return ref->long_field(_timestamp_offset); 3936 } 3937 3938 jlong java_lang_ref_SoftReference::clock() { 3939 InstanceKlass* ik = vmClasses::SoftReference_klass(); 3940 oop base = ik->static_field_base_raw(); 3941 return base->long_field(_static_clock_offset); 3942 } 3943 3944 void java_lang_ref_SoftReference::set_clock(jlong value) { 3945 InstanceKlass* ik = vmClasses::SoftReference_klass(); 3946 oop base = ik->static_field_base_raw(); 3947 base->long_field_put(_static_clock_offset, value); 3948 } 3949 3950 // Support for java_lang_invoke_DirectMethodHandle 3951 3952 int java_lang_invoke_DirectMethodHandle::_member_offset; 3953 3954 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3955 oop member_name = nullptr; 3956 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 3957 "a DirectMethodHandle oop is expected"); 3958 return dmh->obj_field(_member_offset); 3959 } 3960 3961 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 3962 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 3963 3964 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3965 InstanceKlass* k = vmClasses::DirectMethodHandle_klass(); 3966 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3967 } 3968 3969 #if INCLUDE_CDS 3970 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) { 3971 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3972 } 3973 #endif 3974 3975 // Support for java_lang_invoke_MethodHandle 3976 3977 int java_lang_invoke_MethodHandle::_type_offset; 3978 int java_lang_invoke_MethodHandle::_form_offset; 3979 3980 int java_lang_invoke_MemberName::_clazz_offset; 3981 int java_lang_invoke_MemberName::_name_offset; 3982 int java_lang_invoke_MemberName::_type_offset; 3983 int java_lang_invoke_MemberName::_flags_offset; 3984 int java_lang_invoke_MemberName::_method_offset; 3985 int java_lang_invoke_MemberName::_vmindex_offset; 3986 3987 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 3988 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 3989 3990 int java_lang_invoke_LambdaForm::_vmentry_offset; 3991 3992 #define METHODHANDLE_FIELDS_DO(macro) \ 3993 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 3994 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 3995 3996 void java_lang_invoke_MethodHandle::compute_offsets() { 3997 InstanceKlass* k = vmClasses::MethodHandle_klass(); 3998 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3999 } 4000 4001 #if INCLUDE_CDS 4002 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) { 4003 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4004 } 4005 #endif 4006 4007 #define MEMBERNAME_FIELDS_DO(macro) \ 4008 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 4009 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 4010 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 4011 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 4012 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 4013 4014 void java_lang_invoke_MemberName::compute_offsets() { 4015 InstanceKlass* k = vmClasses::MemberName_klass(); 4016 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4017 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4018 } 4019 4020 #if INCLUDE_CDS 4021 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) { 4022 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4023 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4024 } 4025 #endif 4026 4027 #define RESOLVEDMETHOD_FIELDS_DO(macro) \ 4028 macro(_vmholder_offset, k, "vmholder", class_signature, false) 4029 4030 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 4031 InstanceKlass* k = vmClasses::ResolvedMethodName_klass(); 4032 assert(k != nullptr, "jdk mismatch"); 4033 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4034 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4035 } 4036 4037 #if INCLUDE_CDS 4038 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) { 4039 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4040 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4041 } 4042 #endif 4043 4044 #define LAMBDAFORM_FIELDS_DO(macro) \ 4045 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 4046 4047 void java_lang_invoke_LambdaForm::compute_offsets() { 4048 InstanceKlass* k = vmClasses::LambdaForm_klass(); 4049 assert (k != nullptr, "jdk mismatch"); 4050 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4051 } 4052 4053 #if INCLUDE_CDS 4054 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) { 4055 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4056 } 4057 #endif 4058 4059 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 4060 return obj != nullptr && is_subclass(obj->klass()); 4061 } 4062 4063 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset; 4064 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset; 4065 4066 #define NEP_FIELDS_DO(macro) \ 4067 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \ 4068 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false); 4069 4070 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) { 4071 return obj != nullptr && is_subclass(obj->klass()); 4072 } 4073 4074 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() { 4075 InstanceKlass* k = vmClasses::NativeEntryPoint_klass(); 4076 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4077 } 4078 4079 #if INCLUDE_CDS 4080 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) { 4081 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4082 } 4083 #endif 4084 4085 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) { 4086 return entry->obj_field(_method_type_offset); 4087 } 4088 4089 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) { 4090 return entry->long_field(_downcall_stub_address_offset); 4091 } 4092 4093 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset; 4094 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset; 4095 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset; 4096 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset; 4097 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset; 4098 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset; 4099 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset; 4100 4101 #define ABIDescriptor_FIELDS_DO(macro) \ 4102 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4103 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4104 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4105 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \ 4106 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \ 4107 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \ 4108 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false); 4109 4110 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) { 4111 return obj != nullptr && is_subclass(obj->klass()); 4112 } 4113 4114 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() { 4115 InstanceKlass* k = vmClasses::ABIDescriptor_klass(); 4116 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4117 } 4118 4119 #if INCLUDE_CDS 4120 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) { 4121 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4122 } 4123 #endif 4124 4125 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) { 4126 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset)); 4127 } 4128 4129 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) { 4130 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset)); 4131 } 4132 4133 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) { 4134 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset)); 4135 } 4136 4137 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) { 4138 return entry->int_field(_stackAlignment_offset); 4139 } 4140 4141 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) { 4142 return entry->int_field(_shadowSpace_offset); 4143 } 4144 4145 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) { 4146 return entry->obj_field(_scratch1_offset); 4147 } 4148 4149 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) { 4150 return entry->obj_field(_scratch2_offset); 4151 } 4152 4153 int jdk_internal_foreign_abi_VMStorage::_type_offset; 4154 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset; 4155 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset; 4156 int jdk_internal_foreign_abi_VMStorage::_debugName_offset; 4157 4158 #define VMStorage_FIELDS_DO(macro) \ 4159 macro(_type_offset, k, "type", byte_signature, false); \ 4160 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \ 4161 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \ 4162 macro(_debugName_offset, k, "debugName", string_signature, false); \ 4163 4164 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) { 4165 return obj != nullptr && is_subclass(obj->klass()); 4166 } 4167 4168 void jdk_internal_foreign_abi_VMStorage::compute_offsets() { 4169 InstanceKlass* k = vmClasses::VMStorage_klass(); 4170 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4171 } 4172 4173 #if INCLUDE_CDS 4174 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) { 4175 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4176 } 4177 #endif 4178 4179 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) { 4180 return entry->byte_field(_type_offset); 4181 } 4182 4183 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) { 4184 return entry->int_field(_indexOrOffset_offset); 4185 } 4186 4187 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) { 4188 return entry->short_field(_segmentMaskOrSize_offset); 4189 } 4190 4191 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) { 4192 return entry->obj_field(_debugName_offset); 4193 } 4194 4195 int jdk_internal_foreign_abi_CallConv::_argRegs_offset; 4196 int jdk_internal_foreign_abi_CallConv::_retRegs_offset; 4197 4198 #define CallConv_FIELDS_DO(macro) \ 4199 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \ 4200 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \ 4201 4202 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) { 4203 return obj != nullptr && is_subclass(obj->klass()); 4204 } 4205 4206 void jdk_internal_foreign_abi_CallConv::compute_offsets() { 4207 InstanceKlass* k = vmClasses::CallConv_klass(); 4208 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4209 } 4210 4211 #if INCLUDE_CDS 4212 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) { 4213 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4214 } 4215 #endif 4216 4217 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) { 4218 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset)); 4219 } 4220 4221 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) { 4222 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset)); 4223 } 4224 4225 oop java_lang_invoke_MethodHandle::type(oop mh) { 4226 return mh->obj_field(_type_offset); 4227 } 4228 4229 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 4230 mh->obj_field_put(_type_offset, mtype); 4231 } 4232 4233 oop java_lang_invoke_MethodHandle::form(oop mh) { 4234 assert(_form_offset != 0, ""); 4235 return mh->obj_field(_form_offset); 4236 } 4237 4238 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 4239 assert(_form_offset != 0, ""); 4240 mh->obj_field_put(_form_offset, lform); 4241 } 4242 4243 /// MemberName accessors 4244 4245 oop java_lang_invoke_MemberName::clazz(oop mname) { 4246 assert(is_instance(mname), "wrong type"); 4247 return mname->obj_field(_clazz_offset); 4248 } 4249 4250 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 4251 assert(is_instance(mname), "wrong type"); 4252 mname->obj_field_put(_clazz_offset, clazz); 4253 } 4254 4255 oop java_lang_invoke_MemberName::name(oop mname) { 4256 assert(is_instance(mname), "wrong type"); 4257 return mname->obj_field(_name_offset); 4258 } 4259 4260 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 4261 assert(is_instance(mname), "wrong type"); 4262 mname->obj_field_put(_name_offset, name); 4263 } 4264 4265 oop java_lang_invoke_MemberName::type(oop mname) { 4266 assert(is_instance(mname), "wrong type"); 4267 return mname->obj_field(_type_offset); 4268 } 4269 4270 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 4271 assert(is_instance(mname), "wrong type"); 4272 mname->obj_field_put(_type_offset, type); 4273 } 4274 4275 int java_lang_invoke_MemberName::flags(oop mname) { 4276 assert(is_instance(mname), "wrong type"); 4277 return mname->int_field(_flags_offset); 4278 } 4279 4280 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 4281 assert(is_instance(mname), "wrong type"); 4282 mname->int_field_put(_flags_offset, flags); 4283 } 4284 4285 4286 // Return vmtarget from ResolvedMethodName method field through indirection 4287 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 4288 assert(is_instance(mname), "wrong type"); 4289 oop method = mname->obj_field(_method_offset); 4290 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method); 4291 } 4292 4293 bool java_lang_invoke_MemberName::is_method(oop mname) { 4294 assert(is_instance(mname), "must be MemberName"); 4295 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 4296 } 4297 4298 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 4299 assert(is_instance(mname), "wrong type"); 4300 mname->obj_field_put(_method_offset, resolved_method); 4301 } 4302 4303 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 4304 assert(is_instance(mname), "wrong type"); 4305 return (intptr_t) mname->address_field(_vmindex_offset); 4306 } 4307 4308 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 4309 assert(is_instance(mname), "wrong type"); 4310 mname->address_field_put(_vmindex_offset, (address) index); 4311 } 4312 4313 4314 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 4315 assert(is_instance(resolved_method), "wrong type"); 4316 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 4317 assert(m->is_method(), "must be"); 4318 return m; 4319 } 4320 4321 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 4322 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 4323 assert(is_instance(resolved_method), "wrong type"); 4324 resolved_method->address_field_put(_vmtarget_offset, (address)m); 4325 } 4326 4327 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) { 4328 assert(is_instance(resolved_method), "wrong type"); 4329 resolved_method->obj_field_put(_vmholder_offset, holder); 4330 } 4331 4332 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 4333 const Method* method = m(); 4334 4335 // lookup ResolvedMethod oop in the table, or create a new one and intern it 4336 oop resolved_method = ResolvedMethodTable::find_method(method); 4337 if (resolved_method != nullptr) { 4338 return resolved_method; 4339 } 4340 4341 InstanceKlass* k = vmClasses::ResolvedMethodName_klass(); 4342 if (!k->is_initialized()) { 4343 k->initialize(CHECK_NULL); 4344 } 4345 4346 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 4347 4348 NoSafepointVerifier nsv; 4349 4350 if (method->is_old()) { 4351 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() : 4352 method->get_new_method(); 4353 } 4354 4355 InstanceKlass* holder = method->method_holder(); 4356 4357 set_vmtarget(new_resolved_method, const_cast<Method*>(method)); 4358 // Add a reference to the loader (actually mirror because hidden classes may not have 4359 // distinct loaders) to ensure the metadata is kept alive. 4360 // This mirror may be different than the one in clazz field. 4361 set_vmholder(new_resolved_method, holder->java_mirror()); 4362 4363 // Set flag in class to indicate this InstanceKlass has entries in the table 4364 // to avoid walking table during redefinition if none of the redefined classes 4365 // have any membernames in the table. 4366 holder->set_has_resolved_methods(); 4367 4368 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method)); 4369 } 4370 4371 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 4372 assert(is_instance(lform), "wrong type"); 4373 return lform->obj_field(_vmentry_offset); 4374 } 4375 4376 4377 // Support for java_lang_invoke_MethodType 4378 4379 int java_lang_invoke_MethodType::_rtype_offset; 4380 int java_lang_invoke_MethodType::_ptypes_offset; 4381 4382 #define METHODTYPE_FIELDS_DO(macro) \ 4383 macro(_rtype_offset, k, "rtype", class_signature, false); \ 4384 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 4385 4386 void java_lang_invoke_MethodType::compute_offsets() { 4387 InstanceKlass* k = vmClasses::MethodType_klass(); 4388 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4389 } 4390 4391 #if INCLUDE_CDS 4392 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) { 4393 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4394 } 4395 #endif 4396 4397 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 4398 st->print("("); 4399 objArrayOop pts = ptypes(mt); 4400 if (pts != nullptr) { 4401 for (int i = 0, limit = pts->length(); i < limit; i++) { 4402 java_lang_Class::print_signature(pts->obj_at(i), st); 4403 } 4404 } else { 4405 st->print("null"); 4406 } 4407 st->print(")"); 4408 oop rt = rtype(mt); 4409 if (rt != nullptr) { 4410 java_lang_Class::print_signature(rt, st); 4411 } else { 4412 st->print("null"); 4413 } 4414 } 4415 4416 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) { 4417 ResourceMark rm; 4418 stringStream buffer(128); 4419 print_signature(mt, &buffer); 4420 const char* sigstr = buffer.base(); 4421 int siglen = (int) buffer.size(); 4422 Symbol *name; 4423 if (!intern_if_not_found) { 4424 name = SymbolTable::probe(sigstr, siglen); 4425 } else { 4426 name = SymbolTable::new_symbol(sigstr, siglen); 4427 } 4428 return name; 4429 } 4430 4431 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 4432 if (mt1 == mt2) 4433 return true; 4434 if (rtype(mt1) != rtype(mt2)) 4435 return false; 4436 if (ptype_count(mt1) != ptype_count(mt2)) 4437 return false; 4438 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 4439 if (ptype(mt1, i) != ptype(mt2, i)) 4440 return false; 4441 } 4442 return true; 4443 } 4444 4445 oop java_lang_invoke_MethodType::rtype(oop mt) { 4446 assert(is_instance(mt), "must be a MethodType"); 4447 return mt->obj_field(_rtype_offset); 4448 } 4449 4450 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 4451 assert(is_instance(mt), "must be a MethodType"); 4452 return (objArrayOop) mt->obj_field(_ptypes_offset); 4453 } 4454 4455 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 4456 return ptypes(mt)->obj_at(idx); 4457 } 4458 4459 int java_lang_invoke_MethodType::ptype_count(oop mt) { 4460 return ptypes(mt)->length(); 4461 } 4462 4463 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 4464 objArrayOop pts = ptypes(mt); 4465 int count = pts->length(); 4466 int slots = 0; 4467 for (int i = 0; i < count; i++) { 4468 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 4469 slots += type2size[bt]; 4470 } 4471 return slots; 4472 } 4473 4474 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 4475 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 4476 return type2size[bt]; 4477 } 4478 4479 4480 // Support for java_lang_invoke_CallSite 4481 4482 int java_lang_invoke_CallSite::_target_offset; 4483 int java_lang_invoke_CallSite::_context_offset; 4484 4485 #define CALLSITE_FIELDS_DO(macro) \ 4486 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 4487 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false) 4488 4489 void java_lang_invoke_CallSite::compute_offsets() { 4490 InstanceKlass* k = vmClasses::CallSite_klass(); 4491 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4492 } 4493 4494 #if INCLUDE_CDS 4495 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) { 4496 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4497 } 4498 #endif 4499 4500 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) { 4501 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 4502 4503 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset); 4504 return dep_oop; 4505 } 4506 4507 // Support for java_lang_invoke_ConstantCallSite 4508 4509 int java_lang_invoke_ConstantCallSite::_is_frozen_offset; 4510 4511 #define CONSTANTCALLSITE_FIELDS_DO(macro) \ 4512 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false) 4513 4514 void java_lang_invoke_ConstantCallSite::compute_offsets() { 4515 InstanceKlass* k = vmClasses::ConstantCallSite_klass(); 4516 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4517 } 4518 4519 #if INCLUDE_CDS 4520 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) { 4521 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4522 } 4523 #endif 4524 4525 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 4526 4527 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 4528 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset; 4529 4530 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 4531 InstanceKlass* k = vmClasses::Context_klass(); 4532 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4533 } 4534 4535 #if INCLUDE_CDS 4536 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) { 4537 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4538 } 4539 #endif 4540 4541 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 4542 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 4543 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset); 4544 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset); 4545 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr); 4546 return dep_ctx; 4547 } 4548 4549 // Support for java_security_AccessControlContext 4550 4551 int java_security_AccessControlContext::_context_offset; 4552 int java_security_AccessControlContext::_privilegedContext_offset; 4553 int java_security_AccessControlContext::_isPrivileged_offset; 4554 int java_security_AccessControlContext::_isAuthorized_offset; 4555 4556 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \ 4557 macro(_context_offset, k, "context", protectiondomain_signature, false); \ 4558 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \ 4559 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \ 4560 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false) 4561 4562 void java_security_AccessControlContext::compute_offsets() { 4563 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 4564 InstanceKlass* k = vmClasses::AccessControlContext_klass(); 4565 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4566 } 4567 4568 #if INCLUDE_CDS 4569 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) { 4570 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4571 } 4572 #endif 4573 4574 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 4575 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 4576 assert(_isAuthorized_offset != 0, "offsets should have been initialized"); 4577 // Ensure klass is initialized 4578 vmClasses::AccessControlContext_klass()->initialize(CHECK_NULL); 4579 // Allocate result 4580 oop result = vmClasses::AccessControlContext_klass()->allocate_instance(CHECK_NULL); 4581 // Fill in values 4582 result->obj_field_put(_context_offset, context()); 4583 result->obj_field_put(_privilegedContext_offset, privileged_context()); 4584 result->bool_field_put(_isPrivileged_offset, isPrivileged); 4585 result->bool_field_put(_isAuthorized_offset, true); 4586 return result; 4587 } 4588 4589 4590 // Support for java_lang_ClassLoader 4591 4592 int java_lang_ClassLoader::_loader_data_offset; 4593 int java_lang_ClassLoader::_parallelCapable_offset; 4594 int java_lang_ClassLoader::_name_offset; 4595 int java_lang_ClassLoader::_nameAndId_offset; 4596 int java_lang_ClassLoader::_unnamedModule_offset; 4597 int java_lang_ClassLoader::_parent_offset; 4598 4599 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) { 4600 assert(loader != nullptr, "loader must not be null"); 4601 assert(oopDesc::is_oop(loader), "loader must be oop"); 4602 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset)); 4603 } 4604 4605 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 4606 assert(loader != nullptr, "loader must not be null"); 4607 assert(oopDesc::is_oop(loader), "loader must be oop"); 4608 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset); 4609 } 4610 4611 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) { 4612 assert(loader != nullptr, "loader must not be null"); 4613 assert(oopDesc::is_oop(loader), "loader must be oop"); 4614 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data); 4615 } 4616 4617 #define CLASSLOADER_FIELDS_DO(macro) \ 4618 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 4619 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 4620 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \ 4621 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 4622 macro(_parent_offset, k1, "parent", classloader_signature, false) 4623 4624 void java_lang_ClassLoader::compute_offsets() { 4625 InstanceKlass* k1 = vmClasses::ClassLoader_klass(); 4626 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4627 4628 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4629 } 4630 4631 #if INCLUDE_CDS 4632 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) { 4633 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4634 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4635 } 4636 #endif 4637 4638 oop java_lang_ClassLoader::parent(oop loader) { 4639 assert(is_instance(loader), "loader must be oop"); 4640 return loader->obj_field(_parent_offset); 4641 } 4642 4643 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) { 4644 assert(is_instance(loader), "loader must be oop"); 4645 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset); 4646 } 4647 4648 // Returns the name field of this class loader. If the name field has not 4649 // been set, null will be returned. 4650 oop java_lang_ClassLoader::name(oop loader) { 4651 assert(is_instance(loader), "loader must be oop"); 4652 return loader->obj_field(_name_offset); 4653 } 4654 4655 // Returns the nameAndId field of this class loader. The format is 4656 // as follows: 4657 // If the defining loader has a name explicitly set then '<loader-name>' @<id> 4658 // If the defining loader has no name then <qualified-class-name> @<id> 4659 // If built-in loader, then omit '@<id>' as there is only one instance. 4660 // Use ClassLoader::loader_name_id() to obtain this String as a char*. 4661 oop java_lang_ClassLoader::nameAndId(oop loader) { 4662 assert(is_instance(loader), "loader must be oop"); 4663 return loader->obj_field(_nameAndId_offset); 4664 } 4665 4666 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 4667 assert(is_instance(loader), "loader must be oop"); 4668 assert(cl == nullptr || is_instance(cl), "cl argument must be oop"); 4669 oop acl = loader; 4670 debug_only(jint loop_count = 0); 4671 // This loop taken verbatim from ClassLoader.java: 4672 do { 4673 acl = parent(acl); 4674 if (cl == acl) { 4675 return true; 4676 } 4677 assert(++loop_count > 0, "loop_count overflow"); 4678 } while (acl != nullptr); 4679 return false; 4680 } 4681 4682 bool java_lang_ClassLoader::is_instance(oop obj) { 4683 return obj != nullptr && is_subclass(obj->klass()); 4684 } 4685 4686 4687 // For class loader classes, parallelCapable defined 4688 // based on non-null field 4689 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 4690 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 4691 assert(_parallelCapable_offset != 0, "offsets should have been initialized"); 4692 return (class_loader->obj_field(_parallelCapable_offset) != nullptr); 4693 } 4694 4695 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 4696 // Fix for 4474172; see evaluation for more details 4697 loader = non_reflection_class_loader(loader); 4698 4699 oop cl = SystemDictionary::java_system_loader(); 4700 while(cl != nullptr) { 4701 if (cl == loader) return true; 4702 cl = parent(cl); 4703 } 4704 return false; 4705 } 4706 4707 // Return true if this is one of the class loaders associated with 4708 // the generated bytecodes for serialization constructor returned 4709 // by sun.reflect.ReflectionFactory::newConstructorForSerialization 4710 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 4711 if (loader != nullptr) { 4712 Klass* delegating_cl_class = vmClasses::reflect_DelegatingClassLoader_klass(); 4713 // This might be null in non-1.4 JDKs 4714 return (delegating_cl_class != nullptr && loader->is_a(delegating_cl_class)); 4715 } 4716 return false; 4717 } 4718 4719 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 4720 // See whether this is one of the class loaders associated with 4721 // the generated bytecodes for reflection, and if so, "magically" 4722 // delegate to its parent to prevent class loading from occurring 4723 // in places where applications using reflection didn't expect it. 4724 if (is_reflection_class_loader(loader)) { 4725 return parent(loader); 4726 } 4727 return loader; 4728 } 4729 4730 oop java_lang_ClassLoader::unnamedModule(oop loader) { 4731 assert(is_instance(loader), "loader must be oop"); 4732 return loader->obj_field(_unnamedModule_offset); 4733 } 4734 4735 // Support for java_lang_System 4736 // 4737 4738 int java_lang_System::_static_in_offset; 4739 int java_lang_System::_static_out_offset; 4740 int java_lang_System::_static_err_offset; 4741 int java_lang_System::_static_security_offset; 4742 int java_lang_System::_static_allow_security_offset; 4743 int java_lang_System::_static_never_offset; 4744 4745 #define SYSTEM_FIELDS_DO(macro) \ 4746 macro(_static_in_offset, k, "in", input_stream_signature, true); \ 4747 macro(_static_out_offset, k, "out", print_stream_signature, true); \ 4748 macro(_static_err_offset, k, "err", print_stream_signature, true); \ 4749 macro(_static_security_offset, k, "security", security_manager_signature, true); \ 4750 macro(_static_allow_security_offset, k, "allowSecurityManager", int_signature, true); \ 4751 macro(_static_never_offset, k, "NEVER", int_signature, true) 4752 4753 void java_lang_System::compute_offsets() { 4754 InstanceKlass* k = vmClasses::System_klass(); 4755 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4756 } 4757 4758 // This field tells us that a security manager can never be installed so we 4759 // can completely skip populating the ProtectionDomainCacheTable. 4760 bool java_lang_System::allow_security_manager() { 4761 static int initialized = false; 4762 static bool allowed = true; // default 4763 if (!initialized) { 4764 oop base = vmClasses::System_klass()->static_field_base_raw(); 4765 int never = base->int_field(_static_never_offset); 4766 allowed = (base->int_field(_static_allow_security_offset) != never); 4767 initialized = true; 4768 } 4769 return allowed; 4770 } 4771 4772 // This field tells us that a security manager is installed. 4773 bool java_lang_System::has_security_manager() { 4774 oop base = vmClasses::System_klass()->static_field_base_raw(); 4775 return base->obj_field(_static_security_offset) != nullptr; 4776 } 4777 4778 #if INCLUDE_CDS 4779 void java_lang_System::serialize_offsets(SerializeClosure* f) { 4780 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4781 } 4782 #endif 4783 4784 // Support for jdk_internal_misc_UnsafeConstants 4785 // 4786 class UnsafeConstantsFixup : public FieldClosure { 4787 private: 4788 int _address_size; 4789 int _page_size; 4790 bool _big_endian; 4791 bool _use_unaligned_access; 4792 int _data_cache_line_flush_size; 4793 public: 4794 UnsafeConstantsFixup() { 4795 // round up values for all static final fields 4796 _address_size = sizeof(void*); 4797 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size()); 4798 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true); 4799 _use_unaligned_access = UseUnalignedAccesses; 4800 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size(); 4801 } 4802 4803 void do_field(fieldDescriptor* fd) { 4804 oop mirror = fd->field_holder()->java_mirror(); 4805 assert(mirror != nullptr, "UnsafeConstants must have mirror already"); 4806 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants"); 4807 assert(fd->is_final(), "fields of UnsafeConstants must be final"); 4808 assert(fd->is_static(), "fields of UnsafeConstants must be static"); 4809 if (fd->name() == vmSymbols::address_size_name()) { 4810 mirror->int_field_put(fd->offset(), _address_size); 4811 } else if (fd->name() == vmSymbols::page_size_name()) { 4812 mirror->int_field_put(fd->offset(), _page_size); 4813 } else if (fd->name() == vmSymbols::big_endian_name()) { 4814 mirror->bool_field_put(fd->offset(), _big_endian); 4815 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) { 4816 mirror->bool_field_put(fd->offset(), _use_unaligned_access); 4817 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) { 4818 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size); 4819 } else { 4820 assert(false, "unexpected UnsafeConstants field"); 4821 } 4822 } 4823 }; 4824 4825 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() { 4826 UnsafeConstantsFixup fixup; 4827 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup); 4828 } 4829 4830 4831 // java_lang_StackTraceElement 4832 4833 int java_lang_StackTraceElement::_methodName_offset; 4834 int java_lang_StackTraceElement::_fileName_offset; 4835 int java_lang_StackTraceElement::_lineNumber_offset; 4836 int java_lang_StackTraceElement::_moduleName_offset; 4837 int java_lang_StackTraceElement::_moduleVersion_offset; 4838 int java_lang_StackTraceElement::_classLoaderName_offset; 4839 int java_lang_StackTraceElement::_declaringClass_offset; 4840 int java_lang_StackTraceElement::_declaringClassObject_offset; 4841 4842 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4843 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4844 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4845 macro(_moduleName_offset, k, "moduleName", string_signature, false); \ 4846 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4847 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \ 4848 macro(_methodName_offset, k, "methodName", string_signature, false); \ 4849 macro(_fileName_offset, k, "fileName", string_signature, false); \ 4850 macro(_lineNumber_offset, k, "lineNumber", int_signature, false) 4851 4852 // Support for java_lang_StackTraceElement 4853 void java_lang_StackTraceElement::compute_offsets() { 4854 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 4855 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4856 } 4857 4858 #if INCLUDE_CDS 4859 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) { 4860 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4861 } 4862 #endif 4863 4864 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 4865 element->obj_field_put(_fileName_offset, value); 4866 } 4867 4868 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 4869 element->obj_field_put(_declaringClass_offset, value); 4870 } 4871 4872 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 4873 element->obj_field_put(_methodName_offset, value); 4874 } 4875 4876 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 4877 element->int_field_put(_lineNumber_offset, value); 4878 } 4879 4880 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 4881 element->obj_field_put(_moduleName_offset, value); 4882 } 4883 4884 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 4885 element->obj_field_put(_moduleVersion_offset, value); 4886 } 4887 4888 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 4889 element->obj_field_put(_classLoaderName_offset, value); 4890 } 4891 4892 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 4893 element->obj_field_put(_declaringClassObject_offset, value); 4894 } 4895 4896 4897 // java_lang_AssertionStatusDirectives 4898 4899 int java_lang_AssertionStatusDirectives::_classes_offset; 4900 int java_lang_AssertionStatusDirectives::_classEnabled_offset; 4901 int java_lang_AssertionStatusDirectives::_packages_offset; 4902 int java_lang_AssertionStatusDirectives::_packageEnabled_offset; 4903 int java_lang_AssertionStatusDirectives::_deflt_offset; 4904 4905 // Support for java Assertions - java_lang_AssertionStatusDirectives. 4906 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 4907 macro(_classes_offset, k, "classes", string_array_signature, false); \ 4908 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 4909 macro(_packages_offset, k, "packages", string_array_signature, false); \ 4910 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 4911 macro(_deflt_offset, k, "deflt", bool_signature, false) 4912 4913 void java_lang_AssertionStatusDirectives::compute_offsets() { 4914 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass(); 4915 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4916 } 4917 4918 #if INCLUDE_CDS 4919 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) { 4920 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4921 } 4922 #endif 4923 4924 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 4925 o->obj_field_put(_classes_offset, val); 4926 } 4927 4928 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 4929 o->obj_field_put(_classEnabled_offset, val); 4930 } 4931 4932 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 4933 o->obj_field_put(_packages_offset, val); 4934 } 4935 4936 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 4937 o->obj_field_put(_packageEnabled_offset, val); 4938 } 4939 4940 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 4941 o->bool_field_put(_deflt_offset, val); 4942 } 4943 4944 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset; 4945 4946 #define AOS_FIELDS_DO(macro) \ 4947 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false) 4948 4949 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() { 4950 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass(); 4951 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4952 } 4953 4954 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 4955 assert(_owner_offset != 0, "Must be initialized"); 4956 return obj->obj_field(_owner_offset); 4957 } 4958 4959 #if INCLUDE_CDS 4960 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) { 4961 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4962 } 4963 #endif 4964 4965 int vector_VectorPayload::_payload_offset; 4966 4967 #define VECTORPAYLOAD_FIELDS_DO(macro) \ 4968 macro(_payload_offset, k, "payload", object_signature, false) 4969 4970 void vector_VectorPayload::compute_offsets() { 4971 InstanceKlass* k = vmClasses::vector_VectorPayload_klass(); 4972 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4973 } 4974 4975 #if INCLUDE_CDS 4976 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) { 4977 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4978 } 4979 #endif 4980 4981 void vector_VectorPayload::set_payload(oop o, oop val) { 4982 o->obj_field_put(_payload_offset, val); 4983 } 4984 4985 bool vector_VectorPayload::is_instance(oop obj) { 4986 return obj != nullptr && is_subclass(obj->klass()); 4987 } 4988 4989 int java_lang_Integer_IntegerCache::_static_cache_offset; 4990 int java_lang_Long_LongCache::_static_cache_offset; 4991 int java_lang_Character_CharacterCache::_static_cache_offset; 4992 int java_lang_Short_ShortCache::_static_cache_offset; 4993 int java_lang_Byte_ByteCache::_static_cache_offset; 4994 4995 #define INTEGER_CACHE_FIELDS_DO(macro) \ 4996 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true) 4997 4998 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) { 4999 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5000 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5001 } 5002 5003 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) { 5004 oop base = ik->static_field_base_raw(); 5005 return objArrayOop(base->obj_field(_static_cache_offset)); 5006 } 5007 5008 Symbol* java_lang_Integer_IntegerCache::symbol() { 5009 return vmSymbols::java_lang_Integer_IntegerCache(); 5010 } 5011 5012 #if INCLUDE_CDS 5013 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) { 5014 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5015 } 5016 #endif 5017 #undef INTEGER_CACHE_FIELDS_DO 5018 5019 jint java_lang_Integer::value(oop obj) { 5020 jvalue v; 5021 java_lang_boxing_object::get_value(obj, &v); 5022 return v.i; 5023 } 5024 5025 #define LONG_CACHE_FIELDS_DO(macro) \ 5026 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true) 5027 5028 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) { 5029 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5030 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5031 } 5032 5033 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) { 5034 oop base = ik->static_field_base_raw(); 5035 return objArrayOop(base->obj_field(_static_cache_offset)); 5036 } 5037 5038 Symbol* java_lang_Long_LongCache::symbol() { 5039 return vmSymbols::java_lang_Long_LongCache(); 5040 } 5041 5042 #if INCLUDE_CDS 5043 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) { 5044 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5045 } 5046 #endif 5047 #undef LONG_CACHE_FIELDS_DO 5048 5049 jlong java_lang_Long::value(oop obj) { 5050 jvalue v; 5051 java_lang_boxing_object::get_value(obj, &v); 5052 return v.j; 5053 } 5054 5055 #define CHARACTER_CACHE_FIELDS_DO(macro) \ 5056 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true) 5057 5058 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) { 5059 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5060 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5061 } 5062 5063 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) { 5064 oop base = ik->static_field_base_raw(); 5065 return objArrayOop(base->obj_field(_static_cache_offset)); 5066 } 5067 5068 Symbol* java_lang_Character_CharacterCache::symbol() { 5069 return vmSymbols::java_lang_Character_CharacterCache(); 5070 } 5071 5072 #if INCLUDE_CDS 5073 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) { 5074 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5075 } 5076 #endif 5077 #undef CHARACTER_CACHE_FIELDS_DO 5078 5079 jchar java_lang_Character::value(oop obj) { 5080 jvalue v; 5081 java_lang_boxing_object::get_value(obj, &v); 5082 return v.c; 5083 } 5084 5085 #define SHORT_CACHE_FIELDS_DO(macro) \ 5086 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true) 5087 5088 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) { 5089 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5090 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5091 } 5092 5093 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) { 5094 oop base = ik->static_field_base_raw(); 5095 return objArrayOop(base->obj_field(_static_cache_offset)); 5096 } 5097 5098 Symbol* java_lang_Short_ShortCache::symbol() { 5099 return vmSymbols::java_lang_Short_ShortCache(); 5100 } 5101 5102 #if INCLUDE_CDS 5103 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) { 5104 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5105 } 5106 #endif 5107 #undef SHORT_CACHE_FIELDS_DO 5108 5109 jshort java_lang_Short::value(oop obj) { 5110 jvalue v; 5111 java_lang_boxing_object::get_value(obj, &v); 5112 return v.s; 5113 } 5114 5115 #define BYTE_CACHE_FIELDS_DO(macro) \ 5116 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true) 5117 5118 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) { 5119 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5120 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5121 } 5122 5123 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) { 5124 oop base = ik->static_field_base_raw(); 5125 return objArrayOop(base->obj_field(_static_cache_offset)); 5126 } 5127 5128 Symbol* java_lang_Byte_ByteCache::symbol() { 5129 return vmSymbols::java_lang_Byte_ByteCache(); 5130 } 5131 5132 #if INCLUDE_CDS 5133 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) { 5134 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5135 } 5136 #endif 5137 #undef BYTE_CACHE_FIELDS_DO 5138 5139 jbyte java_lang_Byte::value(oop obj) { 5140 jvalue v; 5141 java_lang_boxing_object::get_value(obj, &v); 5142 return v.b; 5143 } 5144 5145 int java_lang_Boolean::_static_TRUE_offset; 5146 int java_lang_Boolean::_static_FALSE_offset; 5147 5148 #define BOOLEAN_FIELDS_DO(macro) \ 5149 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \ 5150 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true) 5151 5152 5153 void java_lang_Boolean::compute_offsets(InstanceKlass *k) { 5154 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5155 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5156 } 5157 5158 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) { 5159 oop base = ik->static_field_base_raw(); 5160 return base->obj_field(_static_TRUE_offset); 5161 } 5162 5163 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) { 5164 oop base = ik->static_field_base_raw(); 5165 return base->obj_field(_static_FALSE_offset); 5166 } 5167 5168 Symbol* java_lang_Boolean::symbol() { 5169 return vmSymbols::java_lang_Boolean(); 5170 } 5171 5172 #if INCLUDE_CDS 5173 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) { 5174 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5175 } 5176 #endif 5177 #undef BOOLEAN_CACHE_FIELDS_DO 5178 5179 jboolean java_lang_Boolean::value(oop obj) { 5180 jvalue v; 5181 java_lang_boxing_object::get_value(obj, &v); 5182 return v.z; 5183 } 5184 5185 // java_lang_reflect_RecordComponent 5186 5187 int java_lang_reflect_RecordComponent::_clazz_offset; 5188 int java_lang_reflect_RecordComponent::_name_offset; 5189 int java_lang_reflect_RecordComponent::_type_offset; 5190 int java_lang_reflect_RecordComponent::_accessor_offset; 5191 int java_lang_reflect_RecordComponent::_signature_offset; 5192 int java_lang_reflect_RecordComponent::_annotations_offset; 5193 int java_lang_reflect_RecordComponent::_typeAnnotations_offset; 5194 5195 #define RECORDCOMPONENT_FIELDS_DO(macro) \ 5196 macro(_clazz_offset, k, "clazz", class_signature, false); \ 5197 macro(_name_offset, k, "name", string_signature, false); \ 5198 macro(_type_offset, k, "type", class_signature, false); \ 5199 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \ 5200 macro(_signature_offset, k, "signature", string_signature, false); \ 5201 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \ 5202 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false); 5203 5204 // Support for java_lang_reflect_RecordComponent 5205 void java_lang_reflect_RecordComponent::compute_offsets() { 5206 InstanceKlass* k = vmClasses::RecordComponent_klass(); 5207 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5208 } 5209 5210 #if INCLUDE_CDS 5211 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) { 5212 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5213 } 5214 #endif 5215 5216 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) { 5217 element->obj_field_put(_clazz_offset, value); 5218 } 5219 5220 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) { 5221 element->obj_field_put(_name_offset, value); 5222 } 5223 5224 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) { 5225 element->obj_field_put(_type_offset, value); 5226 } 5227 5228 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) { 5229 element->obj_field_put(_accessor_offset, value); 5230 } 5231 5232 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) { 5233 element->obj_field_put(_signature_offset, value); 5234 } 5235 5236 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) { 5237 element->obj_field_put(_annotations_offset, value); 5238 } 5239 5240 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) { 5241 element->obj_field_put(_typeAnnotations_offset, value); 5242 } 5243 5244 // java_lang_InternalError 5245 int java_lang_InternalError::_during_unsafe_access_offset; 5246 5247 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) { 5248 internal_error->bool_field_put(_during_unsafe_access_offset, true); 5249 } 5250 5251 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) { 5252 return internal_error->bool_field(_during_unsafe_access_offset); 5253 } 5254 5255 void java_lang_InternalError::compute_offsets() { 5256 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 5257 } 5258 5259 #if INCLUDE_CDS 5260 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) { 5261 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 5262 } 5263 #endif 5264 5265 #define BASIC_JAVA_CLASSES_DO_PART1(f) \ 5266 f(java_lang_Class) \ 5267 f(java_lang_String) \ 5268 f(java_lang_ref_Reference) \ 5269 //end 5270 5271 #define BASIC_JAVA_CLASSES_DO_PART2(f) \ 5272 f(java_lang_System) \ 5273 f(java_lang_ClassLoader) \ 5274 f(java_lang_Throwable) \ 5275 f(java_lang_Thread) \ 5276 f(java_lang_Thread_FieldHolder) \ 5277 f(java_lang_Thread_Constants) \ 5278 f(java_lang_ThreadGroup) \ 5279 f(java_lang_VirtualThread) \ 5280 f(java_lang_InternalError) \ 5281 f(java_lang_AssertionStatusDirectives) \ 5282 f(java_lang_ref_SoftReference) \ 5283 f(java_lang_invoke_MethodHandle) \ 5284 f(java_lang_invoke_DirectMethodHandle) \ 5285 f(java_lang_invoke_MemberName) \ 5286 f(java_lang_invoke_ResolvedMethodName) \ 5287 f(java_lang_invoke_LambdaForm) \ 5288 f(java_lang_invoke_MethodType) \ 5289 f(java_lang_invoke_CallSite) \ 5290 f(java_lang_invoke_ConstantCallSite) \ 5291 f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \ 5292 f(java_security_AccessControlContext) \ 5293 f(java_lang_reflect_AccessibleObject) \ 5294 f(java_lang_reflect_Method) \ 5295 f(java_lang_reflect_Constructor) \ 5296 f(java_lang_reflect_Field) \ 5297 f(java_lang_reflect_RecordComponent) \ 5298 f(reflect_ConstantPool) \ 5299 f(java_lang_reflect_Parameter) \ 5300 f(java_lang_Module) \ 5301 f(java_lang_StackTraceElement) \ 5302 f(java_lang_ClassFrameInfo) \ 5303 f(java_lang_StackFrameInfo) \ 5304 f(java_lang_LiveStackFrameInfo) \ 5305 f(jdk_internal_vm_ContinuationScope) \ 5306 f(jdk_internal_vm_Continuation) \ 5307 f(jdk_internal_vm_StackChunk) \ 5308 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \ 5309 f(jdk_internal_foreign_abi_NativeEntryPoint) \ 5310 f(jdk_internal_foreign_abi_ABIDescriptor) \ 5311 f(jdk_internal_foreign_abi_VMStorage) \ 5312 f(jdk_internal_foreign_abi_CallConv) \ 5313 f(jdk_internal_misc_UnsafeConstants) \ 5314 f(java_lang_boxing_object) \ 5315 f(vector_VectorPayload) \ 5316 //end 5317 5318 #define BASIC_JAVA_CLASSES_DO(f) \ 5319 BASIC_JAVA_CLASSES_DO_PART1(f) \ 5320 BASIC_JAVA_CLASSES_DO_PART2(f) 5321 5322 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets(); 5323 5324 // Compute field offsets of all the classes in this file 5325 void JavaClasses::compute_offsets() { 5326 if (UseSharedSpaces) { 5327 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() && 5328 JvmtiExport::has_early_class_hook_env()), 5329 "JavaClasses::compute_offsets() must be called in early JVMTI phase.")); 5330 // None of the classes used by the rest of this function can be replaced by 5331 // JVMTI ClassFileLoadHook. 5332 // We are safe to use the archived offsets, which have already been restored 5333 // by JavaClasses::serialize_offsets, without computing the offsets again. 5334 return; 5335 } 5336 5337 // We have already called the compute_offsets() of the 5338 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and 5339 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all() 5340 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS); 5341 } 5342 5343 #if INCLUDE_CDS 5344 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc); 5345 5346 void JavaClasses::serialize_offsets(SerializeClosure* soc) { 5347 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS); 5348 } 5349 #endif 5350 5351 #if INCLUDE_CDS_JAVA_HEAP 5352 bool JavaClasses::is_supported_for_archiving(oop obj) { 5353 Klass* klass = obj->klass(); 5354 5355 if (klass == vmClasses::ClassLoader_klass() || // ClassLoader::loader_data is malloc'ed. 5356 // The next 3 classes are used to implement java.lang.invoke, and are not used directly in 5357 // regular Java code. The implementation of java.lang.invoke uses generated hidden classes 5358 // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS. 5359 // So for now we cannot not support these classes for archiving. 5360 // 5361 // These objects typically are not referenced by static fields, but rather by resolved 5362 // constant pool entries, so excluding them shouldn't affect the archiving of static fields. 5363 klass == vmClasses::ResolvedMethodName_klass() || 5364 klass == vmClasses::MemberName_klass() || 5365 klass == vmClasses::Context_klass() || 5366 // It's problematic to archive Reference objects. One of the reasons is that 5367 // Reference::discovered may pull in unwanted objects (see JDK-8284336) 5368 klass->is_subclass_of(vmClasses::Reference_klass())) { 5369 return false; 5370 } 5371 5372 return true; 5373 } 5374 #endif 5375 5376 #ifndef PRODUCT 5377 5378 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check. 5379 5380 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name, 5381 const char* field_sig) { 5382 EXCEPTION_MARK; 5383 fieldDescriptor fd; 5384 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name); 5385 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 5386 InstanceKlass* ik = InstanceKlass::cast(k); 5387 TempNewSymbol f_name = SymbolTable::new_symbol(field_name); 5388 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig); 5389 if (!ik->find_local_field(f_name, f_sig, &fd)) { 5390 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 5391 return false; 5392 } 5393 if (fd.is_static()) { 5394 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 5395 return false; 5396 } 5397 if (fd.offset() == deserialized_offset ) { 5398 return true; 5399 } else { 5400 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.", 5401 klass_name, field_name, deserialized_offset, fd.offset()); 5402 return false; 5403 } 5404 } 5405 5406 void JavaClasses::check_offsets() { 5407 bool valid = true; 5408 5409 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 5410 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig) 5411 5412 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 5413 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig) 5414 5415 // Boxed primitive objects (java_lang_boxing_object) 5416 5417 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 5418 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 5419 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 5420 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 5421 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 5422 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 5423 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 5424 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 5425 5426 if (!valid) vm_exit_during_initialization("Field offset verification failed"); 5427 } 5428 5429 #endif // PRODUCT 5430 5431 int InjectedField::compute_offset() { 5432 InstanceKlass* ik = InstanceKlass::cast(klass()); 5433 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 5434 if (!may_be_java && !fs.field_flags().is_injected()) { 5435 // Only look at injected fields 5436 continue; 5437 } 5438 if (fs.name() == name() && fs.signature() == signature()) { 5439 return fs.offset(); 5440 } 5441 } 5442 ResourceMark rm; 5443 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)" : ""); 5444 #ifndef PRODUCT 5445 ik->print(); 5446 tty->print_cr("all fields:"); 5447 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 5448 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 5449 } 5450 #endif //PRODUCT 5451 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 5452 return -1; 5453 } 5454 5455 void javaClasses_init() { 5456 JavaClasses::compute_offsets(); 5457 JavaClasses::check_offsets(); 5458 FilteredFieldsMap::initialize(); // must be done after computing offsets. 5459 }