1 /* 2 * Copyright (c) 1997, 2024, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "cds/archiveBuilder.hpp" 27 #include "cds/archiveHeapLoader.hpp" 28 #include "cds/cdsConfig.hpp" 29 #include "cds/heapShared.hpp" 30 #include "cds/metaspaceShared.hpp" 31 #include "classfile/altHashing.hpp" 32 #include "classfile/classLoaderData.inline.hpp" 33 #include "classfile/javaClasses.inline.hpp" 34 #include "classfile/javaClassesImpl.hpp" 35 #include "classfile/javaThreadStatus.hpp" 36 #include "classfile/moduleEntry.hpp" 37 #include "classfile/stringTable.hpp" 38 #include "classfile/symbolTable.hpp" 39 #include "classfile/systemDictionary.hpp" 40 #include "classfile/vmClasses.hpp" 41 #include "classfile/vmSymbols.hpp" 42 #include "code/debugInfo.hpp" 43 #include "code/dependencyContext.hpp" 44 #include "code/pcDesc.hpp" 45 #include "gc/shared/collectedHeap.inline.hpp" 46 #include "interpreter/interpreter.hpp" 47 #include "interpreter/linkResolver.hpp" 48 #include "jvm.h" 49 #include "logging/log.hpp" 50 #include "logging/logStream.hpp" 51 #include "memory/oopFactory.hpp" 52 #include "memory/resourceArea.hpp" 53 #include "memory/universe.hpp" 54 #include "oops/fieldInfo.hpp" 55 #include "oops/fieldStreams.inline.hpp" 56 #include "oops/instanceKlass.inline.hpp" 57 #include "oops/instanceMirrorKlass.hpp" 58 #include "oops/klass.hpp" 59 #include "oops/klass.inline.hpp" 60 #include "oops/method.inline.hpp" 61 #include "oops/objArrayKlass.hpp" 62 #include "oops/objArrayOop.inline.hpp" 63 #include "oops/oopCast.inline.hpp" 64 #include "oops/oop.inline.hpp" 65 #include "oops/symbol.hpp" 66 #include "oops/recordComponent.hpp" 67 #include "oops/typeArrayOop.inline.hpp" 68 #include "prims/jvmtiExport.hpp" 69 #include "prims/methodHandles.hpp" 70 #include "prims/resolvedMethodTable.hpp" 71 #include "runtime/continuationEntry.inline.hpp" 72 #include "runtime/continuationJavaClasses.inline.hpp" 73 #include "runtime/fieldDescriptor.inline.hpp" 74 #include "runtime/frame.inline.hpp" 75 #include "runtime/handles.inline.hpp" 76 #include "runtime/handshake.hpp" 77 #include "runtime/init.hpp" 78 #include "runtime/interfaceSupport.inline.hpp" 79 #include "runtime/java.hpp" 80 #include "runtime/javaCalls.hpp" 81 #include "runtime/javaThread.hpp" 82 #include "runtime/jniHandles.inline.hpp" 83 #include "runtime/reflectionUtils.hpp" 84 #include "runtime/safepoint.hpp" 85 #include "runtime/safepointVerifiers.hpp" 86 #include "runtime/threadSMR.hpp" 87 #include "runtime/vframe.inline.hpp" 88 #include "runtime/vm_version.hpp" 89 #include "utilities/align.hpp" 90 #include "utilities/globalDefinitions.hpp" 91 #include "utilities/growableArray.hpp" 92 #include "utilities/preserveException.hpp" 93 #include "utilities/utf8.hpp" 94 #if INCLUDE_JVMCI 95 #include "jvmci/jvmciJavaClasses.hpp" 96 #endif 97 98 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 99 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 100 101 InjectedField JavaClasses::_injected_fields[] = { 102 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 103 }; 104 105 // Register native methods of Object 106 void java_lang_Object::register_natives(TRAPS) { 107 InstanceKlass* obj = vmClasses::Object_klass(); 108 Method::register_native(obj, vmSymbols::hashCode_name(), 109 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK); 110 Method::register_native(obj, vmSymbols::wait_name(), 111 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK); 112 Method::register_native(obj, vmSymbols::notify_name(), 113 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK); 114 Method::register_native(obj, vmSymbols::notifyAll_name(), 115 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK); 116 Method::register_native(obj, vmSymbols::clone_name(), 117 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD); 118 } 119 120 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 121 return _injected_fields[(int)id].compute_offset(); 122 } 123 124 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 125 *field_count = 0; 126 127 vmSymbolID sid = vmSymbols::find_sid(class_name); 128 if (sid == vmSymbolID::NO_SID) { 129 // Only well known classes can inject fields 130 return nullptr; 131 } 132 133 int count = 0; 134 int start = -1; 135 136 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 137 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \ 138 count++; \ 139 if (start == -1) { \ 140 start = (int)InjectedFieldID::klass##_##name##_enum; \ 141 } \ 142 } 143 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 144 #undef LOOKUP_INJECTED_FIELD 145 146 if (start != -1) { 147 *field_count = count; 148 return _injected_fields + start; 149 } 150 return nullptr; 151 } 152 153 154 // Helpful routine for computing field offsets at run time rather than hardcoding them 155 // Finds local fields only, including static fields. Static field offsets are from the 156 // beginning of the mirror. 157 void JavaClasses::compute_offset(int &dest_offset, 158 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol, 159 bool is_static) { 160 fieldDescriptor fd; 161 if (ik == nullptr) { 162 ResourceMark rm; 163 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string()); 164 vm_exit_during_initialization("Invalid layout of well-known class"); 165 } 166 167 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) { 168 ResourceMark rm; 169 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(), 170 name_symbol->as_C_string(), signature_symbol->as_C_string()); 171 #ifndef PRODUCT 172 // Prints all fields and offsets 173 Log(class) lt; 174 LogStream ls(lt.error()); 175 ik->print_on(&ls); 176 #endif //PRODUCT 177 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 178 } 179 dest_offset = fd.offset(); 180 } 181 182 // Overloading to pass name as a string. 183 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik, 184 const char* name_string, Symbol* signature_symbol, 185 bool is_static) { 186 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string)); 187 if (name == nullptr) { 188 ResourceMark rm; 189 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string); 190 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name()); 191 } 192 compute_offset(dest_offset, ik, name, signature_symbol, is_static); 193 } 194 195 // java_lang_String 196 197 int java_lang_String::_value_offset; 198 int java_lang_String::_hash_offset; 199 int java_lang_String::_hashIsZero_offset; 200 int java_lang_String::_coder_offset; 201 int java_lang_String::_flags_offset; 202 203 bool java_lang_String::_initialized; 204 205 206 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) { 207 uint8_t* addr = flags_addr(java_string); 208 uint8_t value = Atomic::load(addr); 209 while ((value & flag_mask) == 0) { 210 uint8_t old_value = value; 211 value |= flag_mask; 212 value = Atomic::cmpxchg(addr, old_value, value); 213 if (value == old_value) return false; // Flag bit changed from 0 to 1. 214 } 215 return true; // Flag bit is already 1. 216 } 217 218 #define STRING_FIELDS_DO(macro) \ 219 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \ 220 macro(_hash_offset, k, "hash", int_signature, false); \ 221 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \ 222 macro(_coder_offset, k, "coder", byte_signature, false); 223 224 void java_lang_String::compute_offsets() { 225 if (_initialized) { 226 return; 227 } 228 229 InstanceKlass* k = vmClasses::String_klass(); 230 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 231 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 232 233 _initialized = true; 234 } 235 236 #if INCLUDE_CDS 237 void java_lang_String::serialize_offsets(SerializeClosure* f) { 238 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 239 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 240 f->do_bool(&_initialized); 241 } 242 #endif 243 244 class CompactStringsFixup : public FieldClosure { 245 private: 246 bool _value; 247 248 public: 249 CompactStringsFixup(bool value) : _value(value) {} 250 251 void do_field(fieldDescriptor* fd) { 252 if (fd->name() == vmSymbols::compact_strings_name()) { 253 oop mirror = fd->field_holder()->java_mirror(); 254 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String"); 255 assert(mirror != nullptr, "String must have mirror already"); 256 mirror->bool_field_put(fd->offset(), _value); 257 } 258 } 259 }; 260 261 void java_lang_String::set_compact_strings(bool value) { 262 CompactStringsFixup fix(value); 263 vmClasses::String_klass()->do_local_static_fields(&fix); 264 } 265 266 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 267 assert(_initialized, "Must be initialized"); 268 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 269 270 // Create the String object first, so there's a chance that the String 271 // and the char array it points to end up in the same cache line. 272 oop obj; 273 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH); 274 275 // Create the char array. The String object must be handlized here 276 // because GC can happen as a result of the allocation attempt. 277 Handle h_obj(THREAD, obj); 278 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 279 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 280 281 // Point the String at the char array 282 obj = h_obj(); 283 set_value(obj, buffer); 284 // No need to zero the offset, allocation zero'ed the entire String object 285 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 286 return h_obj; 287 } 288 289 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) { 290 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 291 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 292 typeArrayOop buffer = value(h_obj()); 293 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 294 if (is_latin1) { 295 for (int index = 0; index < length; index++) { 296 buffer->byte_at_put(index, (jbyte)unicode[index]); 297 } 298 } else { 299 for (int index = 0; index < length; index++) { 300 buffer->char_at_put(index, unicode[index]); 301 } 302 } 303 304 #ifdef ASSERT 305 { 306 ResourceMark rm; 307 char* expected = UNICODE::as_utf8(unicode, length); 308 char* actual = as_utf8_string(h_obj()); 309 if (strcmp(expected, actual) != 0) { 310 fatal("Unicode conversion failure: %s --> %s", expected, actual); 311 } 312 } 313 #endif 314 315 return h_obj; 316 } 317 318 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) { 319 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL); 320 return h_obj(); 321 } 322 323 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 324 if (utf8_str == nullptr) { 325 return Handle(); 326 } 327 bool has_multibyte, is_latin1; 328 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 329 if (!CompactStrings) { 330 has_multibyte = true; 331 is_latin1 = false; 332 } 333 334 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 335 if (length > 0) { 336 if (!has_multibyte) { 337 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 338 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 339 } else if (is_latin1) { 340 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 341 } else { 342 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 343 } 344 } 345 346 #ifdef ASSERT 347 // This check is too strict when the input string is not a valid UTF8. 348 // For example, it may be created with arbitrary content via jni_NewStringUTF. 349 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, (int)strlen(utf8_str), false)) { 350 ResourceMark rm; 351 const char* expected = utf8_str; 352 char* actual = as_utf8_string(h_obj()); 353 if (strcmp(expected, actual) != 0) { 354 fatal("String conversion failure: %s --> %s", expected, actual); 355 } 356 } 357 #endif 358 359 return h_obj; 360 } 361 362 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 363 Handle h_obj = create_from_str(utf8_str, CHECK_NULL); 364 return h_obj(); 365 } 366 367 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 368 const char* utf8_str = (char*)symbol->bytes(); 369 int utf8_len = symbol->utf8_length(); 370 371 bool has_multibyte, is_latin1; 372 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 373 if (!CompactStrings) { 374 has_multibyte = true; 375 is_latin1 = false; 376 } 377 378 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 379 if (length > 0) { 380 if (!has_multibyte) { 381 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 382 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 383 } else if (is_latin1) { 384 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 385 } else { 386 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 387 } 388 } 389 390 #ifdef ASSERT 391 { 392 ResourceMark rm; 393 const char* expected = symbol->as_utf8(); 394 char* actual = as_utf8_string(h_obj()); 395 if (strncmp(expected, actual, utf8_len) != 0) { 396 fatal("Symbol conversion failure: %s --> %s", expected, actual); 397 } 398 } 399 #endif 400 401 return h_obj; 402 } 403 404 // Converts a C string to a Java String based on current encoding 405 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 406 assert(str != nullptr, "bad arguments"); 407 408 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *); 409 static to_java_string_fn_t _to_java_string_fn = nullptr; 410 411 if (_to_java_string_fn == nullptr) { 412 void *lib_handle = os::native_java_library(); 413 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform")); 414 #if defined(_WIN32) && !defined(_WIN64) 415 if (_to_java_string_fn == nullptr) { 416 // On 32 bit Windows, also try __stdcall decorated name 417 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8")); 418 } 419 #endif 420 if (_to_java_string_fn == nullptr) { 421 fatal("JNU_NewStringPlatform missing"); 422 } 423 } 424 425 jstring js = nullptr; 426 { 427 JavaThread* thread = THREAD; 428 HandleMark hm(thread); 429 ThreadToNativeFromVM ttn(thread); 430 js = (_to_java_string_fn)(thread->jni_environment(), str); 431 } 432 433 Handle native_platform_string(THREAD, JNIHandles::resolve(js)); 434 JNIHandles::destroy_local(js); // destroy local JNIHandle. 435 return native_platform_string; 436 } 437 438 // Converts a Java String to a native C string that can be used for 439 // native OS calls. 440 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 441 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 442 static to_platform_string_fn_t _to_platform_string_fn = nullptr; 443 444 if (_to_platform_string_fn == nullptr) { 445 void *lib_handle = os::native_java_library(); 446 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 447 if (_to_platform_string_fn == nullptr) { 448 fatal("GetStringPlatformChars missing"); 449 } 450 } 451 452 char *native_platform_string; 453 jstring js; 454 { JavaThread* thread = THREAD; 455 js = (jstring) JNIHandles::make_local(thread, java_string()); 456 HandleMark hm(thread); 457 ThreadToNativeFromVM ttn(thread); 458 JNIEnv *env = thread->jni_environment(); 459 bool is_copy; 460 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 461 assert(is_copy == JNI_TRUE, "is_copy value changed"); 462 } 463 464 // Uses a store barrier and therefore needs to be in vm state 465 JNIHandles::destroy_local(js); 466 467 return native_platform_string; 468 } 469 470 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) { 471 ResourceMark rm(THREAD); 472 return create_from_str(java_name->as_klass_external_name(), THREAD); 473 } 474 475 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 476 jchar* result = as_unicode_string_or_null(java_string, length); 477 if (result == nullptr) { 478 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 479 } 480 return result; 481 } 482 483 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) { 484 typeArrayOop value = java_lang_String::value(java_string); 485 length = java_lang_String::length(java_string, value); 486 bool is_latin1 = java_lang_String::is_latin1(java_string); 487 488 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 489 if (result != nullptr) { 490 if (!is_latin1) { 491 for (int index = 0; index < length; index++) { 492 result[index] = value->char_at(index); 493 } 494 } else { 495 for (int index = 0; index < length; index++) { 496 result[index] = ((jchar) value->byte_at(index)) & 0xff; 497 } 498 } 499 } 500 return result; 501 } 502 503 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) { 504 // The hash and hashIsZero fields are subject to a benign data race, 505 // making it crucial to ensure that any observable result of the 506 // calculation in this method stays correct under any possible read of 507 // these fields. Necessary restrictions to allow this to be correct 508 // without explicit memory fences or similar concurrency primitives is 509 // that we can ever only write to one of these two fields for a given 510 // String instance, and that the computation is idempotent and derived 511 // from immutable state 512 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized"); 513 if (java_lang_String::hash_is_set(java_string)) { 514 return java_string->int_field(_hash_offset); 515 } 516 517 typeArrayOop value = java_lang_String::value(java_string); 518 int length = java_lang_String::length(java_string, value); 519 bool is_latin1 = java_lang_String::is_latin1(java_string); 520 521 unsigned int hash = 0; 522 if (length > 0) { 523 if (is_latin1) { 524 hash = java_lang_String::hash_code(value->byte_at_addr(0), length); 525 } else { 526 hash = java_lang_String::hash_code(value->char_at_addr(0), length); 527 } 528 } 529 530 if (update) { 531 if (hash != 0) { 532 java_string->int_field_put(_hash_offset, hash); 533 } else { 534 java_string->bool_field_put(_hashIsZero_offset, true); 535 } 536 } 537 return hash; 538 } 539 540 unsigned int java_lang_String::hash_code(oop java_string) { 541 return hash_code_impl(java_string, /*update=*/true); 542 } 543 544 unsigned int java_lang_String::hash_code_noupdate(oop java_string) { 545 return hash_code_impl(java_string, /*update=*/false); 546 } 547 548 549 char* java_lang_String::as_quoted_ascii(oop java_string) { 550 typeArrayOop value = java_lang_String::value(java_string); 551 int length = java_lang_String::length(java_string, value); 552 bool is_latin1 = java_lang_String::is_latin1(java_string); 553 554 if (length == 0) return nullptr; 555 556 char* result; 557 int result_length; 558 if (!is_latin1) { 559 jchar* base = value->char_at_addr(0); 560 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 561 result = NEW_RESOURCE_ARRAY(char, result_length); 562 UNICODE::as_quoted_ascii(base, length, result, result_length); 563 } else { 564 jbyte* base = value->byte_at_addr(0); 565 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 566 result = NEW_RESOURCE_ARRAY(char, result_length); 567 UNICODE::as_quoted_ascii(base, length, result, result_length); 568 } 569 assert(result_length >= length + 1, "must not be shorter"); 570 assert(result_length == (int)strlen(result) + 1, "must match"); 571 return result; 572 } 573 574 Symbol* java_lang_String::as_symbol(oop java_string) { 575 typeArrayOop value = java_lang_String::value(java_string); 576 int length = java_lang_String::length(java_string, value); 577 bool is_latin1 = java_lang_String::is_latin1(java_string); 578 if (!is_latin1) { 579 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0); 580 Symbol* sym = SymbolTable::new_symbol(base, length); 581 return sym; 582 } else { 583 ResourceMark rm; 584 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 585 const char* base = UNICODE::as_utf8(position, length); 586 Symbol* sym = SymbolTable::new_symbol(base, length); 587 return sym; 588 } 589 } 590 591 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 592 typeArrayOop value = java_lang_String::value(java_string); 593 int length = java_lang_String::length(java_string, value); 594 bool is_latin1 = java_lang_String::is_latin1(java_string); 595 if (!is_latin1) { 596 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0); 597 return SymbolTable::probe_unicode(base, length); 598 } else { 599 ResourceMark rm; 600 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 601 const char* base = UNICODE::as_utf8(position, length); 602 return SymbolTable::probe(base, length); 603 } 604 } 605 606 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) { 607 assert(value_equals(value, java_lang_String::value(java_string)), 608 "value must be same as java_lang_String::value(java_string)"); 609 int length = java_lang_String::length(java_string, value); 610 if (length == 0) { 611 return 0; 612 } 613 if (!java_lang_String::is_latin1(java_string)) { 614 return UNICODE::utf8_length(value->char_at_addr(0), length); 615 } else { 616 return UNICODE::utf8_length(value->byte_at_addr(0), length); 617 } 618 } 619 620 int java_lang_String::utf8_length(oop java_string) { 621 typeArrayOop value = java_lang_String::value(java_string); 622 return utf8_length(java_string, value); 623 } 624 625 char* java_lang_String::as_utf8_string(oop java_string) { 626 int length; 627 return as_utf8_string(java_string, length); 628 } 629 630 char* java_lang_String::as_utf8_string(oop java_string, int& length) { 631 typeArrayOop value = java_lang_String::value(java_string); 632 length = java_lang_String::length(java_string, value); 633 bool is_latin1 = java_lang_String::is_latin1(java_string); 634 if (!is_latin1) { 635 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0); 636 return UNICODE::as_utf8(position, length); 637 } else { 638 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 639 return UNICODE::as_utf8(position, length); 640 } 641 } 642 643 // Uses a provided buffer if it's sufficiently large, otherwise allocates 644 // a resource array to fit 645 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, int buflen, int& utf8_len) { 646 typeArrayOop value = java_lang_String::value(java_string); 647 int len = java_lang_String::length(java_string, value); 648 bool is_latin1 = java_lang_String::is_latin1(java_string); 649 if (!is_latin1) { 650 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0); 651 utf8_len = UNICODE::utf8_length(position, len); 652 if (utf8_len >= buflen) { 653 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 654 } 655 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 656 } else { 657 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0); 658 utf8_len = UNICODE::utf8_length(position, len); 659 if (utf8_len >= buflen) { 660 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 661 } 662 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 663 } 664 } 665 666 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) { 667 assert(value_equals(value, java_lang_String::value(java_string)), 668 "value must be same as java_lang_String::value(java_string)"); 669 int length = java_lang_String::length(java_string, value); 670 bool is_latin1 = java_lang_String::is_latin1(java_string); 671 if (!is_latin1) { 672 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0); 673 return UNICODE::as_utf8(position, length, buf, buflen); 674 } else { 675 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 676 return UNICODE::as_utf8(position, length, buf, buflen); 677 } 678 } 679 680 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 681 typeArrayOop value = java_lang_String::value(java_string); 682 return as_utf8_string(java_string, value, buf, buflen); 683 } 684 685 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 686 typeArrayOop value = java_lang_String::value(java_string); 687 bool is_latin1 = java_lang_String::is_latin1(java_string); 688 assert(start + len <= java_lang_String::length(java_string), "just checking"); 689 if (!is_latin1) { 690 jchar* position = value->char_at_addr(start); 691 return UNICODE::as_utf8(position, len); 692 } else { 693 jbyte* position = value->byte_at_addr(start); 694 return UNICODE::as_utf8(position, len); 695 } 696 } 697 698 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) { 699 assert(value_equals(value, java_lang_String::value(java_string)), 700 "value must be same as java_lang_String::value(java_string)"); 701 assert(start + len <= java_lang_String::length(java_string), "just checking"); 702 bool is_latin1 = java_lang_String::is_latin1(java_string); 703 if (!is_latin1) { 704 jchar* position = value->char_at_addr(start); 705 return UNICODE::as_utf8(position, len, buf, buflen); 706 } else { 707 jbyte* position = value->byte_at_addr(start); 708 return UNICODE::as_utf8(position, len, buf, buflen); 709 } 710 } 711 712 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) { 713 assert(java_string->klass() == vmClasses::String_klass(), 714 "must be java_string"); 715 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 716 int length = java_lang_String::length(java_string, value); 717 if (length != len) { 718 return false; 719 } 720 bool is_latin1 = java_lang_String::is_latin1(java_string); 721 if (!is_latin1) { 722 for (int i = 0; i < len; i++) { 723 if (value->char_at(i) != chars[i]) { 724 return false; 725 } 726 } 727 } else { 728 for (int i = 0; i < len; i++) { 729 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 730 return false; 731 } 732 } 733 } 734 return true; 735 } 736 737 bool java_lang_String::equals(oop str1, oop str2) { 738 assert(str1->klass() == vmClasses::String_klass(), 739 "must be java String"); 740 assert(str2->klass() == vmClasses::String_klass(), 741 "must be java String"); 742 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1); 743 bool is_latin1 = java_lang_String::is_latin1(str1); 744 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2); 745 bool is_latin2 = java_lang_String::is_latin1(str2); 746 747 if (is_latin1 != is_latin2) { 748 // Strings with different coders are never equal. 749 return false; 750 } 751 return value_equals(value1, value2); 752 } 753 754 void java_lang_String::print(oop java_string, outputStream* st) { 755 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string"); 756 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 757 758 if (value == nullptr) { 759 // This can happen if, e.g., printing a String 760 // object before its initializer has been called 761 st->print("nullptr"); 762 return; 763 } 764 765 int length = java_lang_String::length(java_string, value); 766 bool is_latin1 = java_lang_String::is_latin1(java_string); 767 768 st->print("\""); 769 for (int index = 0; index < length; index++) { 770 jchar c = (!is_latin1) ? value->char_at(index) : 771 ((jchar) value->byte_at(index)) & 0xff; 772 if (c < ' ') { 773 st->print("\\x%02X", c); // print control characters e.g. \x0A 774 } else { 775 st->print("%c", c); 776 } 777 } 778 st->print("\""); 779 } 780 781 // java_lang_Class 782 783 int java_lang_Class::_klass_offset; 784 int java_lang_Class::_array_klass_offset; 785 int java_lang_Class::_oop_size_offset; 786 int java_lang_Class::_static_oop_field_count_offset; 787 int java_lang_Class::_class_loader_offset; 788 int java_lang_Class::_module_offset; 789 int java_lang_Class::_protection_domain_offset; 790 int java_lang_Class::_component_mirror_offset; 791 int java_lang_Class::_signers_offset; 792 int java_lang_Class::_name_offset; 793 int java_lang_Class::_source_file_offset; 794 int java_lang_Class::_classData_offset; 795 int java_lang_Class::_classRedefinedCount_offset; 796 797 bool java_lang_Class::_offsets_computed = false; 798 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr; 799 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr; 800 801 #ifdef ASSERT 802 inline static void assert_valid_static_string_field(fieldDescriptor* fd) { 803 assert(fd->has_initial_value(), "caller should have checked this"); 804 assert(fd->field_type() == T_OBJECT, "caller should have checked this"); 805 assert(fd->signature() == vmSymbols::string_signature(), "just checking"); 806 } 807 #endif 808 809 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 810 DEBUG_ONLY(assert_valid_static_string_field(fd);) 811 oop string = fd->string_initial_value(CHECK); 812 mirror()->obj_field_put(fd->offset(), string); 813 } 814 815 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) { 816 assert(fd->has_initial_value(), "caller should have checked this"); 817 BasicType t = fd->field_type(); 818 switch (t) { 819 case T_BYTE: 820 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value())); 821 break; 822 case T_BOOLEAN: 823 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value())); 824 break; 825 case T_CHAR: 826 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value())); 827 break; 828 case T_SHORT: 829 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value())); 830 break; 831 case T_INT: 832 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 833 break; 834 case T_FLOAT: 835 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 836 break; 837 case T_DOUBLE: 838 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 839 break; 840 case T_LONG: 841 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 842 break; 843 default: 844 // Illegal ConstantValue attribute in class file should have been 845 // caught during classfile parsing. 846 ShouldNotReachHere(); 847 } 848 } 849 850 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 851 assert(mirror.not_null() && fd->is_static(), "just checking"); 852 if (fd->has_initial_value()) { 853 if (fd->field_type() != T_OBJECT) { 854 initialize_static_primitive_field(fd, mirror); 855 } else { 856 initialize_static_string_field(fd, mirror, CHECK); 857 } 858 } 859 } 860 861 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 862 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 863 864 // If the offset was read from the shared archive, it was fixed up already 865 if (!k->is_shared()) { 866 if (k->is_instance_klass()) { 867 // During bootstrap, java.lang.Class wasn't loaded so static field 868 // offsets were computed without the size added it. Go back and 869 // update all the static field offsets to included the size. 870 871 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow 872 // content updates. So the FieldInfo stream has to be decompressed into a temporary array, 873 // static fields offsets are updated in this array before reencoding everything into 874 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream. 875 876 int java_fields; 877 int injected_fields; 878 InstanceKlass* ik = InstanceKlass::cast(k); 879 GrowableArray<FieldInfo>* fields = 880 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(), 881 &java_fields, &injected_fields); 882 for (int i = 0; i < fields->length(); i++) { 883 FieldInfo* fi = fields->adr_at(i); 884 if (fi->access_flags().is_static()) { 885 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields()); 886 } 887 } 888 Array<u1>* old_stream = ik->fieldinfo_stream(); 889 assert(fields->length() == (java_fields + injected_fields), "Must be"); 890 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK); 891 ik->set_fieldinfo_stream(new_fis); 892 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream); 893 } 894 } 895 896 if (k->is_shared() && k->has_archived_mirror_index()) { 897 if (ArchiveHeapLoader::is_in_use()) { 898 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK); 899 assert(present, "Missing archived mirror for %s", k->external_name()); 900 return; 901 } else { 902 k->clear_java_mirror_handle(); 903 k->clear_archived_mirror_index(); 904 } 905 } 906 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK); 907 } 908 909 void java_lang_Class::initialize_mirror_fields(Klass* k, 910 Handle mirror, 911 Handle protection_domain, 912 Handle classData, 913 TRAPS) { 914 // Set protection domain also 915 set_protection_domain(mirror(), protection_domain()); 916 917 // Initialize static fields 918 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 919 920 // Set classData 921 set_class_data(mirror(), classData()); 922 } 923 924 // Set the java.lang.Module module field in the java_lang_Class mirror 925 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) { 926 if (module.is_null()) { 927 // During startup, the module may be null only if java.base has not been defined yet. 928 // Put the class on the fixup_module_list to patch later when the java.lang.Module 929 // for java.base is known. But note that since we captured the null module another 930 // thread may have completed that initialization. 931 932 bool javabase_was_defined = false; 933 { 934 MutexLocker m1(current, Module_lock); 935 // Keep list of classes needing java.base module fixup 936 if (!ModuleEntryTable::javabase_defined()) { 937 assert(k->java_mirror() != nullptr, "Class's mirror is null"); 938 k->class_loader_data()->inc_keep_alive(); 939 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized"); 940 fixup_module_field_list()->push(k); 941 } else { 942 javabase_was_defined = true; 943 } 944 } 945 946 // If java.base was already defined then patch this particular class with java.base. 947 if (javabase_was_defined) { 948 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 949 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr, 950 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 951 Handle javabase_handle(current, javabase_entry->module()); 952 set_module(mirror(), javabase_handle()); 953 } 954 } else { 955 assert(Universe::is_module_initialized() || 956 (ModuleEntryTable::javabase_defined() && 957 (module() == ModuleEntryTable::javabase_moduleEntry()->module())), 958 "Incorrect java.lang.Module specification while creating mirror"); 959 set_module(mirror(), module()); 960 } 961 } 962 963 // Statically allocate fixup lists because they always get created. 964 void java_lang_Class::allocate_fixup_lists() { 965 GrowableArray<Klass*>* mirror_list = 966 new (mtClass) GrowableArray<Klass*>(40, mtClass); 967 set_fixup_mirror_list(mirror_list); 968 969 GrowableArray<Klass*>* module_list = 970 new (mtModule) GrowableArray<Klass*>(500, mtModule); 971 set_fixup_module_field_list(module_list); 972 } 973 974 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData, 975 Handle& mirror, Handle& comp_mirror, TRAPS) { 976 // Allocate mirror (java.lang.Class instance) 977 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK); 978 mirror = Handle(THREAD, mirror_oop); 979 980 // Setup indirection from mirror->klass 981 set_klass(mirror(), k); 982 983 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 984 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 985 986 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 987 988 // It might also have a component mirror. This mirror must already exist. 989 if (k->is_array_klass()) { 990 if (k->is_typeArray_klass()) { 991 BasicType type = TypeArrayKlass::cast(k)->element_type(); 992 if (is_scratch) { 993 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type)); 994 } else { 995 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 996 } 997 } else { 998 assert(k->is_objArray_klass(), "Must be"); 999 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1000 assert(element_klass != nullptr, "Must have an element klass"); 1001 if (is_scratch) { 1002 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass)); 1003 } else { 1004 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 1005 } 1006 } 1007 assert(comp_mirror() != nullptr, "must have a mirror"); 1008 1009 // Two-way link between the array klass and its component mirror: 1010 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 1011 set_component_mirror(mirror(), comp_mirror()); 1012 // See below for ordering dependencies between field array_klass in component mirror 1013 // and java_mirror in this klass. 1014 } else { 1015 assert(k->is_instance_klass(), "Must be"); 1016 1017 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD); 1018 if (HAS_PENDING_EXCEPTION) { 1019 // If any of the fields throws an exception like OOM remove the klass field 1020 // from the mirror so GC doesn't follow it after the klass has been deallocated. 1021 // This mirror looks like a primitive type, which logically it is because it 1022 // it represents no class. 1023 set_klass(mirror(), nullptr); 1024 return; 1025 } 1026 } 1027 } 1028 1029 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 1030 Handle module, Handle protection_domain, 1031 Handle classData, TRAPS) { 1032 assert(k != nullptr, "Use create_basic_type_mirror for primitive types"); 1033 assert(k->java_mirror() == nullptr, "should only assign mirror once"); 1034 1035 // Use this moment of initialization to cache modifier_flags also, 1036 // to support Class.getModifiers(). Instance classes recalculate 1037 // the cached flags after the class file is parsed, but before the 1038 // class is put into the system dictionary. 1039 int computed_modifiers = k->compute_modifier_flags(); 1040 k->set_modifier_flags(computed_modifiers); 1041 // Class_klass has to be loaded because it is used to allocate 1042 // the mirror. 1043 if (vmClasses::Class_klass_loaded()) { 1044 Handle mirror; 1045 Handle comp_mirror; 1046 1047 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK); 1048 1049 // set the classLoader field in the java_lang_Class instance 1050 assert(class_loader() == k->class_loader(), "should be same"); 1051 set_class_loader(mirror(), class_loader()); 1052 1053 // Setup indirection from klass->mirror 1054 // after any exceptions can happen during allocations. 1055 k->set_java_mirror(mirror); 1056 1057 // Set the module field in the java_lang_Class instance. This must be done 1058 // after the mirror is set. 1059 set_mirror_module_field(THREAD, k, mirror, module); 1060 1061 if (comp_mirror() != nullptr) { 1062 // Set after k->java_mirror() is published, because compiled code running 1063 // concurrently doesn't expect a k to have a null java_mirror. 1064 release_set_array_klass(comp_mirror(), k); 1065 } 1066 if (CDSConfig::is_dumping_heap()) { 1067 create_scratch_mirror(k, CHECK); 1068 } 1069 } else { 1070 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized"); 1071 fixup_mirror_list()->push(k); 1072 } 1073 } 1074 1075 #if INCLUDE_CDS_JAVA_HEAP 1076 // The "scratch mirror" stores the states of the mirror object that can be 1077 // decided at dump time (such as the initial values of the static fields, the 1078 // component mirror, etc). At runtime, more information is added to it by 1079 // java_lang_Class::restore_archived_mirror(). 1080 // 1081 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror() 1082 // produces the same result as /*runtime*/create_mirror(). 1083 // 1084 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the 1085 // latter may contain dumptime-specific information that cannot be archived 1086 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution). 1087 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) { 1088 if (k->class_loader() != nullptr && 1089 k->class_loader() != SystemDictionary::java_platform_loader() && 1090 k->class_loader() != SystemDictionary::java_system_loader()) { 1091 // We only archive the mirrors of classes loaded by the built-in loaders 1092 return; 1093 } 1094 1095 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime 1096 Handle mirror; 1097 Handle comp_mirror; 1098 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK); 1099 1100 if (comp_mirror() != nullptr) { 1101 release_set_array_klass(comp_mirror(), k); 1102 } 1103 1104 HeapShared::set_scratch_java_mirror(k, mirror()); 1105 } 1106 1107 // Returns true if the mirror is updated, false if no archived mirror 1108 // data is present. After the archived mirror object is restored, the 1109 // shared klass' _has_raw_archived_mirror flag is cleared. 1110 bool java_lang_Class::restore_archived_mirror(Klass *k, 1111 Handle class_loader, Handle module, 1112 Handle protection_domain, TRAPS) { 1113 // Postpone restoring archived mirror until java.lang.Class is loaded. Please 1114 // see more details in vmClasses::resolve_all(). 1115 if (!vmClasses::Class_klass_loaded()) { 1116 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized"); 1117 fixup_mirror_list()->push(k); 1118 return true; 1119 } 1120 1121 oop m = k->archived_java_mirror(); 1122 assert(m != nullptr, "must have stored non-null archived mirror"); 1123 1124 // Sanity: clear it now to prevent re-initialization if any of the following fails 1125 k->clear_archived_mirror_index(); 1126 1127 // mirror is archived, restore 1128 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m)); 1129 assert(as_Klass(m) == k, "must be"); 1130 Handle mirror(THREAD, m); 1131 1132 if (!k->is_array_klass()) { 1133 // - local static final fields with initial values were initialized at dump time 1134 1135 if (protection_domain.not_null()) { 1136 set_protection_domain(mirror(), protection_domain()); 1137 } 1138 } 1139 1140 assert(class_loader() == k->class_loader(), "should be same"); 1141 if (class_loader.not_null()) { 1142 set_class_loader(mirror(), class_loader()); 1143 } 1144 1145 k->set_java_mirror(mirror); 1146 1147 set_mirror_module_field(THREAD, k, mirror, module); 1148 1149 if (log_is_enabled(Trace, cds, heap, mirror)) { 1150 ResourceMark rm(THREAD); 1151 log_trace(cds, heap, mirror)( 1152 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1153 } 1154 1155 return true; 1156 } 1157 #endif // INCLUDE_CDS_JAVA_HEAP 1158 1159 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1160 assert(_module_offset != 0, "must have been computed already"); 1161 set_module(k->java_mirror(), module()); 1162 } 1163 1164 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) { 1165 assert(_oop_size_offset != 0, "must be set"); 1166 assert(size > 0, "Oop size must be greater than zero, not " SIZE_FORMAT, size); 1167 assert(size <= INT_MAX, "Lossy conversion: " SIZE_FORMAT, size); 1168 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size; 1169 } 1170 1171 int java_lang_Class::static_oop_field_count(oop java_class) { 1172 assert(_static_oop_field_count_offset != 0, "must be set"); 1173 return java_class->int_field(_static_oop_field_count_offset); 1174 } 1175 1176 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1177 assert(_static_oop_field_count_offset != 0, "must be set"); 1178 java_class->int_field_put(_static_oop_field_count_offset, size); 1179 } 1180 1181 oop java_lang_Class::protection_domain(oop java_class) { 1182 assert(_protection_domain_offset != 0, "must be set"); 1183 return java_class->obj_field(_protection_domain_offset); 1184 } 1185 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1186 assert(_protection_domain_offset != 0, "must be set"); 1187 java_class->obj_field_put(_protection_domain_offset, pd); 1188 } 1189 1190 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1191 assert(_component_mirror_offset != 0, "must be set"); 1192 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1193 } 1194 oop java_lang_Class::component_mirror(oop java_class) { 1195 assert(_component_mirror_offset != 0, "must be set"); 1196 return java_class->obj_field(_component_mirror_offset); 1197 } 1198 1199 objArrayOop java_lang_Class::signers(oop java_class) { 1200 assert(_signers_offset != 0, "must be set"); 1201 return (objArrayOop)java_class->obj_field(_signers_offset); 1202 } 1203 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 1204 assert(_signers_offset != 0, "must be set"); 1205 java_class->obj_field_put(_signers_offset, signers); 1206 } 1207 1208 oop java_lang_Class::class_data(oop java_class) { 1209 assert(_classData_offset != 0, "must be set"); 1210 return java_class->obj_field(_classData_offset); 1211 } 1212 void java_lang_Class::set_class_data(oop java_class, oop class_data) { 1213 assert(_classData_offset != 0, "must be set"); 1214 java_class->obj_field_put(_classData_offset, class_data); 1215 } 1216 1217 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1218 assert(_class_loader_offset != 0, "offsets should have been initialized"); 1219 java_class->obj_field_put(_class_loader_offset, loader); 1220 } 1221 1222 oop java_lang_Class::class_loader(oop java_class) { 1223 assert(_class_loader_offset != 0, "must be set"); 1224 return java_class->obj_field(_class_loader_offset); 1225 } 1226 1227 oop java_lang_Class::module(oop java_class) { 1228 assert(_module_offset != 0, "must be set"); 1229 return java_class->obj_field(_module_offset); 1230 } 1231 1232 void java_lang_Class::set_module(oop java_class, oop module) { 1233 assert(_module_offset != 0, "must be set"); 1234 java_class->obj_field_put(_module_offset, module); 1235 } 1236 1237 oop java_lang_Class::name(Handle java_class, TRAPS) { 1238 assert(_name_offset != 0, "must be set"); 1239 oop o = java_class->obj_field(_name_offset); 1240 if (o == nullptr) { 1241 o = StringTable::intern(as_external_name(java_class()), THREAD); 1242 java_class->obj_field_put(_name_offset, o); 1243 } 1244 return o; 1245 } 1246 1247 oop java_lang_Class::source_file(oop java_class) { 1248 assert(_source_file_offset != 0, "must be set"); 1249 return java_class->obj_field(_source_file_offset); 1250 } 1251 1252 void java_lang_Class::set_source_file(oop java_class, oop source_file) { 1253 assert(_source_file_offset != 0, "must be set"); 1254 java_class->obj_field_put(_source_file_offset, source_file); 1255 } 1256 1257 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1258 // This should be improved by adding a field at the Java level or by 1259 // introducing a new VM klass (see comment in ClassFileParser) 1260 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL); 1261 if (type != T_VOID) { 1262 Klass* aklass = Universe::typeArrayKlassObj(type); 1263 assert(aklass != nullptr, "correct bootstrap"); 1264 release_set_array_klass(java_class, aklass); 1265 } 1266 #ifdef ASSERT 1267 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass()); 1268 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1269 #endif 1270 return java_class; 1271 } 1272 1273 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1274 assert(is_instance(java_class), "must be a Class object"); 1275 java_class->metadata_field_put(_klass_offset, klass); 1276 } 1277 1278 1279 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1280 assert(is_instance(java_class), "must be a Class object"); 1281 Symbol* name = nullptr; 1282 bool is_instance = false; 1283 if (is_primitive(java_class)) { 1284 name = vmSymbols::type_signature(primitive_type(java_class)); 1285 } else { 1286 Klass* k = as_Klass(java_class); 1287 is_instance = k->is_instance_klass(); 1288 name = k->name(); 1289 } 1290 if (name == nullptr) { 1291 st->print("<null>"); 1292 return; 1293 } 1294 if (is_instance) st->print("L"); 1295 st->write((char*) name->base(), (int) name->utf8_length()); 1296 if (is_instance) st->print(";"); 1297 } 1298 1299 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) { 1300 assert(is_instance(java_class), "must be a Class object"); 1301 Symbol* name; 1302 if (is_primitive(java_class)) { 1303 name = vmSymbols::type_signature(primitive_type(java_class)); 1304 // Because this can create a new symbol, the caller has to decrement 1305 // the refcount, so make adjustment here and below for symbols returned 1306 // that are not created or incremented due to a successful lookup. 1307 name->increment_refcount(); 1308 } else { 1309 Klass* k = as_Klass(java_class); 1310 if (!k->is_instance_klass()) { 1311 name = k->name(); 1312 name->increment_refcount(); 1313 } else { 1314 ResourceMark rm; 1315 const char* sigstr = k->signature_name(); 1316 int siglen = (int) strlen(sigstr); 1317 if (!intern_if_not_found) { 1318 name = SymbolTable::probe(sigstr, siglen); 1319 } else { 1320 name = SymbolTable::new_symbol(sigstr, siglen); 1321 } 1322 } 1323 } 1324 return name; 1325 } 1326 1327 // Returns the Java name for this Java mirror (Resource allocated) 1328 // See Klass::external_name(). 1329 // For primitive type Java mirrors, its type name is returned. 1330 const char* java_lang_Class::as_external_name(oop java_class) { 1331 assert(is_instance(java_class), "must be a Class object"); 1332 const char* name = nullptr; 1333 if (is_primitive(java_class)) { 1334 name = type2name(primitive_type(java_class)); 1335 } else { 1336 name = as_Klass(java_class)->external_name(); 1337 } 1338 if (name == nullptr) { 1339 name = "<null>"; 1340 } 1341 return name; 1342 } 1343 1344 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1345 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1346 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass"); 1347 return k; 1348 } 1349 1350 1351 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1352 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1353 java_class->release_metadata_field_put(_array_klass_offset, klass); 1354 } 1355 1356 1357 BasicType java_lang_Class::primitive_type(oop java_class) { 1358 assert(is_primitive(java_class), "just checking"); 1359 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1360 BasicType type = T_VOID; 1361 if (ak != nullptr) { 1362 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1363 type = ArrayKlass::cast(ak)->element_type(); 1364 } else { 1365 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1366 } 1367 #ifdef ASSERT 1368 if (CDSConfig::is_dumping_heap()) { 1369 oop mirror = Universe::java_mirror(type); 1370 oop scratch_mirror = HeapShared::scratch_java_mirror(type); 1371 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent"); 1372 } else { 1373 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1374 } 1375 #endif 1376 return type; 1377 } 1378 1379 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1380 assert(is_instance(java_class), "must be a Class object"); 1381 if (is_primitive(java_class)) { 1382 if (reference_klass != nullptr) 1383 (*reference_klass) = nullptr; 1384 return primitive_type(java_class); 1385 } else { 1386 if (reference_klass != nullptr) 1387 (*reference_klass) = as_Klass(java_class); 1388 return T_OBJECT; 1389 } 1390 } 1391 1392 1393 oop java_lang_Class::primitive_mirror(BasicType t) { 1394 oop mirror = Universe::java_mirror(t); 1395 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class"); 1396 assert(is_primitive(mirror), "must be primitive"); 1397 return mirror; 1398 } 1399 1400 #define CLASS_FIELDS_DO(macro) \ 1401 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \ 1402 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1403 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1404 macro(_module_offset, k, "module", module_signature, false); \ 1405 macro(_name_offset, k, "name", string_signature, false); \ 1406 macro(_classData_offset, k, "classData", object_signature, false); 1407 1408 void java_lang_Class::compute_offsets() { 1409 if (_offsets_computed) { 1410 return; 1411 } 1412 1413 _offsets_computed = true; 1414 1415 InstanceKlass* k = vmClasses::Class_klass(); 1416 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1417 1418 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1419 } 1420 1421 #if INCLUDE_CDS 1422 void java_lang_Class::serialize_offsets(SerializeClosure* f) { 1423 f->do_bool(&_offsets_computed); 1424 1425 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1426 1427 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1428 } 1429 #endif 1430 1431 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1432 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1433 return the_class_mirror->int_field(_classRedefinedCount_offset); 1434 } 1435 1436 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1437 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1438 the_class_mirror->int_field_put(_classRedefinedCount_offset, value); 1439 } 1440 1441 1442 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1443 // platform thread structure, and a eetop offset which was used for thread 1444 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1445 // merged, so in the HotSpot VM we just use the eetop field for the thread 1446 // instead of the privateInfo_offset. 1447 // 1448 // Note: The stackSize field is only present starting in 1.4. 1449 1450 int java_lang_Thread_FieldHolder::_group_offset; 1451 int java_lang_Thread_FieldHolder::_priority_offset; 1452 int java_lang_Thread_FieldHolder::_stackSize_offset; 1453 int java_lang_Thread_FieldHolder::_daemon_offset; 1454 int java_lang_Thread_FieldHolder::_thread_status_offset; 1455 1456 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \ 1457 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1458 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1459 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1460 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1461 macro(_thread_status_offset, k, "threadStatus", int_signature, false) 1462 1463 void java_lang_Thread_FieldHolder::compute_offsets() { 1464 assert(_group_offset == 0, "offsets should be initialized only once"); 1465 1466 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass(); 1467 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1468 } 1469 1470 #if INCLUDE_CDS 1471 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) { 1472 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1473 } 1474 #endif 1475 1476 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) { 1477 return holder->obj_field(_group_offset); 1478 } 1479 1480 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) { 1481 return (ThreadPriority)holder->int_field(_priority_offset); 1482 } 1483 1484 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) { 1485 holder->int_field_put(_priority_offset, priority); 1486 } 1487 1488 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) { 1489 return holder->long_field(_stackSize_offset); 1490 } 1491 1492 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) { 1493 return holder->bool_field(_daemon_offset) != 0; 1494 } 1495 1496 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) { 1497 assert(val, "daemon status is never turned off"); 1498 holder->bool_field_put(_daemon_offset, val); 1499 } 1500 1501 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) { 1502 holder->int_field_put(_thread_status_offset, static_cast<int>(status)); 1503 } 1504 1505 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) { 1506 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset)); 1507 } 1508 1509 1510 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0; 1511 1512 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \ 1513 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true); 1514 1515 void java_lang_Thread_Constants::compute_offsets() { 1516 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once"); 1517 1518 InstanceKlass* k = vmClasses::Thread_Constants_klass(); 1519 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1520 } 1521 1522 #if INCLUDE_CDS 1523 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) { 1524 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1525 } 1526 #endif 1527 1528 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() { 1529 InstanceKlass* k = vmClasses::Thread_Constants_klass(); 1530 oop base = k->static_field_base_raw(); 1531 return base->obj_field(_static_VTHREAD_GROUP_offset); 1532 } 1533 1534 1535 int java_lang_Thread::_holder_offset; 1536 int java_lang_Thread::_name_offset; 1537 int java_lang_Thread::_contextClassLoader_offset; 1538 int java_lang_Thread::_inheritedAccessControlContext_offset; 1539 int java_lang_Thread::_eetop_offset; 1540 int java_lang_Thread::_jvmti_thread_state_offset; 1541 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset; 1542 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset; 1543 int java_lang_Thread::_interrupted_offset; 1544 int java_lang_Thread::_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 RUNNING: 1994 case PARKING: 1995 case TIMED_PARKING: 1996 case UNPARKED: 1997 case YIELDING: 1998 case YIELDED: 1999 status = JavaThreadStatus::RUNNABLE; 2000 break; 2001 case PARKED: 2002 case PINNED: 2003 status = JavaThreadStatus::PARKED; 2004 break; 2005 case TIMED_PARKED: 2006 case TIMED_PINNED: 2007 status = JavaThreadStatus::PARKED_TIMED; 2008 break; 2009 case TERMINATED: 2010 status = JavaThreadStatus::TERMINATED; 2011 break; 2012 default: 2013 ShouldNotReachHere(); 2014 } 2015 return status; 2016 } 2017 2018 #if INCLUDE_CDS 2019 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) { 2020 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2021 } 2022 #endif 2023 2024 // java_lang_Throwable 2025 2026 int java_lang_Throwable::_backtrace_offset; 2027 int java_lang_Throwable::_detailMessage_offset; 2028 int java_lang_Throwable::_stackTrace_offset; 2029 int java_lang_Throwable::_depth_offset; 2030 int java_lang_Throwable::_cause_offset; 2031 int java_lang_Throwable::_static_unassigned_stacktrace_offset; 2032 2033 #define THROWABLE_FIELDS_DO(macro) \ 2034 macro(_backtrace_offset, k, "backtrace", object_signature, false); \ 2035 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \ 2036 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 2037 macro(_depth_offset, k, "depth", int_signature, false); \ 2038 macro(_cause_offset, k, "cause", throwable_signature, false); \ 2039 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 2040 2041 void java_lang_Throwable::compute_offsets() { 2042 InstanceKlass* k = vmClasses::Throwable_klass(); 2043 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2044 } 2045 2046 #if INCLUDE_CDS 2047 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) { 2048 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2049 } 2050 #endif 2051 2052 oop java_lang_Throwable::unassigned_stacktrace() { 2053 InstanceKlass* ik = vmClasses::Throwable_klass(); 2054 oop base = ik->static_field_base_raw(); 2055 return base->obj_field(_static_unassigned_stacktrace_offset); 2056 } 2057 2058 oop java_lang_Throwable::backtrace(oop throwable) { 2059 return throwable->obj_field_acquire(_backtrace_offset); 2060 } 2061 2062 2063 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 2064 throwable->release_obj_field_put(_backtrace_offset, value); 2065 } 2066 2067 int java_lang_Throwable::depth(oop throwable) { 2068 return throwable->int_field(_depth_offset); 2069 } 2070 2071 void java_lang_Throwable::set_depth(oop throwable, int value) { 2072 throwable->int_field_put(_depth_offset, value); 2073 } 2074 2075 oop java_lang_Throwable::message(oop throwable) { 2076 return throwable->obj_field(_detailMessage_offset); 2077 } 2078 2079 oop java_lang_Throwable::cause(oop throwable) { 2080 return throwable->obj_field(_cause_offset); 2081 } 2082 2083 // Return Symbol for detailed_message or null 2084 Symbol* java_lang_Throwable::detail_message(oop throwable) { 2085 PreserveExceptionMark pm(Thread::current()); 2086 oop detailed_message = java_lang_Throwable::message(throwable); 2087 if (detailed_message != nullptr) { 2088 return java_lang_String::as_symbol(detailed_message); 2089 } 2090 return nullptr; 2091 } 2092 2093 void java_lang_Throwable::set_message(oop throwable, oop value) { 2094 throwable->obj_field_put(_detailMessage_offset, value); 2095 } 2096 2097 2098 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 2099 throwable->obj_field_put(_stackTrace_offset, st_element_array); 2100 } 2101 2102 void java_lang_Throwable::clear_stacktrace(oop throwable) { 2103 set_stacktrace(throwable, nullptr); 2104 } 2105 2106 2107 void java_lang_Throwable::print(oop throwable, outputStream* st) { 2108 ResourceMark rm; 2109 Klass* k = throwable->klass(); 2110 assert(k != nullptr, "just checking"); 2111 st->print("%s", k->external_name()); 2112 oop msg = message(throwable); 2113 if (msg != nullptr) { 2114 st->print(": %s", java_lang_String::as_utf8_string(msg)); 2115 } 2116 } 2117 2118 // After this many redefines, the stack trace is unreliable. 2119 const int MAX_VERSION = USHRT_MAX; 2120 2121 static inline bool version_matches(Method* method, int version) { 2122 assert(version < MAX_VERSION, "version is too big"); 2123 return method != nullptr && (method->constants()->version() == version); 2124 } 2125 2126 // This class provides a simple wrapper over the internal structure of 2127 // exception backtrace to insulate users of the backtrace from needing 2128 // to know what it looks like. 2129 // The code of this class is not GC safe. Allocations can only happen 2130 // in expand(). 2131 class BacktraceBuilder: public StackObj { 2132 friend class BacktraceIterator; 2133 private: 2134 Handle _backtrace; 2135 objArrayOop _head; 2136 typeArrayOop _methods; 2137 typeArrayOop _bcis; 2138 objArrayOop _mirrors; 2139 typeArrayOop _names; // Needed to insulate method name against redefinition. 2140 // True if the top frame of the backtrace is omitted because it shall be hidden. 2141 bool _has_hidden_top_frame; 2142 int _index; 2143 NoSafepointVerifier _nsv; 2144 2145 enum { 2146 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 2147 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 2148 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 2149 trace_names_offset = java_lang_Throwable::trace_names_offset, 2150 trace_conts_offset = java_lang_Throwable::trace_conts_offset, 2151 trace_next_offset = java_lang_Throwable::trace_next_offset, 2152 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset, 2153 trace_size = java_lang_Throwable::trace_size, 2154 trace_chunk_size = java_lang_Throwable::trace_chunk_size 2155 }; 2156 2157 // get info out of chunks 2158 static typeArrayOop get_methods(objArrayHandle chunk) { 2159 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 2160 assert(methods != nullptr, "method array should be initialized in backtrace"); 2161 return methods; 2162 } 2163 static typeArrayOop get_bcis(objArrayHandle chunk) { 2164 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 2165 assert(bcis != nullptr, "bci array should be initialized in backtrace"); 2166 return bcis; 2167 } 2168 static objArrayOop get_mirrors(objArrayHandle chunk) { 2169 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 2170 assert(mirrors != nullptr, "mirror array should be initialized in backtrace"); 2171 return mirrors; 2172 } 2173 static typeArrayOop get_names(objArrayHandle chunk) { 2174 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 2175 assert(names != nullptr, "names array should be initialized in backtrace"); 2176 return names; 2177 } 2178 static bool has_hidden_top_frame(objArrayHandle chunk) { 2179 oop hidden = chunk->obj_at(trace_hidden_offset); 2180 return hidden != nullptr; 2181 } 2182 2183 public: 2184 2185 // constructor for new backtrace 2186 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) { 2187 expand(CHECK); 2188 _backtrace = Handle(THREAD, _head); 2189 _index = 0; 2190 } 2191 2192 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 2193 _methods = get_methods(backtrace); 2194 _bcis = get_bcis(backtrace); 2195 _mirrors = get_mirrors(backtrace); 2196 _names = get_names(backtrace); 2197 _has_hidden_top_frame = has_hidden_top_frame(backtrace); 2198 assert(_methods->length() == _bcis->length() && 2199 _methods->length() == _mirrors->length() && 2200 _mirrors->length() == _names->length(), 2201 "method and source information arrays should match"); 2202 2203 // head is the preallocated backtrace 2204 _head = backtrace(); 2205 _backtrace = Handle(thread, _head); 2206 _index = 0; 2207 } 2208 2209 void expand(TRAPS) { 2210 objArrayHandle old_head(THREAD, _head); 2211 PauseNoSafepointVerifier pnsv(&_nsv); 2212 2213 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2214 objArrayHandle new_head(THREAD, head); 2215 2216 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2217 typeArrayHandle new_methods(THREAD, methods); 2218 2219 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2220 typeArrayHandle new_bcis(THREAD, bcis); 2221 2222 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2223 objArrayHandle new_mirrors(THREAD, mirrors); 2224 2225 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2226 typeArrayHandle new_names(THREAD, names); 2227 2228 if (!old_head.is_null()) { 2229 old_head->obj_at_put(trace_next_offset, new_head()); 2230 } 2231 new_head->obj_at_put(trace_methods_offset, new_methods()); 2232 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2233 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2234 new_head->obj_at_put(trace_names_offset, new_names()); 2235 new_head->obj_at_put(trace_hidden_offset, nullptr); 2236 2237 _head = new_head(); 2238 _methods = new_methods(); 2239 _bcis = new_bcis(); 2240 _mirrors = new_mirrors(); 2241 _names = new_names(); 2242 _index = 0; 2243 } 2244 2245 oop backtrace() { 2246 return _backtrace(); 2247 } 2248 2249 inline void push(Method* method, int bci, TRAPS) { 2250 // Smear the -1 bci to 0 since the array only holds unsigned 2251 // shorts. The later line number lookup would just smear the -1 2252 // to a 0 even if it could be recorded. 2253 if (bci == SynchronizationEntryBCI) bci = 0; 2254 2255 if (_index >= trace_chunk_size) { 2256 methodHandle mhandle(THREAD, method); 2257 expand(CHECK); 2258 method = mhandle(); 2259 } 2260 2261 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2262 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2263 2264 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2265 // klass owning the symbols alive so their refcounts aren't decremented. 2266 Symbol* name = method->name(); 2267 _names->symbol_at_put(_index, name); 2268 2269 // We need to save the mirrors in the backtrace to keep the class 2270 // from being unloaded while we still have this stack trace. 2271 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror"); 2272 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2273 2274 _index++; 2275 } 2276 2277 void set_has_hidden_top_frame() { 2278 if (!_has_hidden_top_frame) { 2279 // It would be nice to add java/lang/Boolean::TRUE here 2280 // to indicate that this backtrace has a hidden top frame. 2281 // But this code is used before TRUE is allocated. 2282 // Therefore let's just use an arbitrary legal oop 2283 // available right here. _methods is a short[]. 2284 assert(_methods != nullptr, "we need a legal oop"); 2285 _has_hidden_top_frame = true; 2286 _head->obj_at_put(trace_hidden_offset, _methods); 2287 } 2288 } 2289 }; 2290 2291 struct BacktraceElement : public StackObj { 2292 int _method_id; 2293 int _bci; 2294 int _version; 2295 Symbol* _name; 2296 Handle _mirror; 2297 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2298 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {} 2299 }; 2300 2301 class BacktraceIterator : public StackObj { 2302 int _index; 2303 objArrayHandle _result; 2304 objArrayHandle _mirrors; 2305 typeArrayHandle _methods; 2306 typeArrayHandle _bcis; 2307 typeArrayHandle _names; 2308 2309 void init(objArrayHandle result, Thread* thread) { 2310 // Get method id, bci, version and mirror from chunk 2311 _result = result; 2312 if (_result.not_null()) { 2313 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2314 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2315 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2316 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2317 _index = 0; 2318 } 2319 } 2320 public: 2321 BacktraceIterator(objArrayHandle result, Thread* thread) { 2322 init(result, thread); 2323 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2324 } 2325 2326 BacktraceElement next(Thread* thread) { 2327 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2328 _methods->ushort_at(_index), 2329 Backtrace::version_at(_bcis->int_at(_index)), 2330 Backtrace::bci_at(_bcis->int_at(_index)), 2331 _names->symbol_at(_index)); 2332 _index++; 2333 2334 if (_index >= java_lang_Throwable::trace_chunk_size) { 2335 int next_offset = java_lang_Throwable::trace_next_offset; 2336 // Get next chunk 2337 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2338 init(result, thread); 2339 } 2340 return e; 2341 } 2342 2343 bool repeat() { 2344 return _result.not_null() && _mirrors->obj_at(_index) != nullptr; 2345 } 2346 }; 2347 2348 2349 // Print stack trace element to resource allocated buffer 2350 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 2351 int version, int bci, Symbol* name) { 2352 ResourceMark rm; 2353 2354 // Get strings and string lengths 2355 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2356 const char* klass_name = holder->external_name(); 2357 int buf_len = (int)strlen(klass_name); 2358 2359 char* method_name = name->as_C_string(); 2360 buf_len += (int)strlen(method_name); 2361 2362 char* source_file_name = nullptr; 2363 Symbol* source = Backtrace::get_source_file_name(holder, version); 2364 if (source != nullptr) { 2365 source_file_name = source->as_C_string(); 2366 buf_len += (int)strlen(source_file_name); 2367 } 2368 2369 char *module_name = nullptr, *module_version = nullptr; 2370 ModuleEntry* module = holder->module(); 2371 if (module->is_named()) { 2372 module_name = module->name()->as_C_string(); 2373 buf_len += (int)strlen(module_name); 2374 if (module->version() != nullptr) { 2375 module_version = module->version()->as_C_string(); 2376 buf_len += (int)strlen(module_version); 2377 } 2378 } 2379 2380 // Allocate temporary buffer with extra space for formatting and line number 2381 const size_t buf_size = buf_len + 64; 2382 char* buf = NEW_RESOURCE_ARRAY(char, buf_size); 2383 2384 // Print stack trace line in buffer 2385 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name); 2386 2387 // Print module information 2388 if (module_name != nullptr) { 2389 if (module_version != nullptr) { 2390 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version); 2391 } else { 2392 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name); 2393 } 2394 } 2395 2396 // The method can be null if the requested class version is gone 2397 Method* method = holder->method_with_orig_idnum(method_id, version); 2398 if (!version_matches(method, version)) { 2399 strcat(buf, "Redefined)"); 2400 } else { 2401 int line_number = Backtrace::get_line_number(method, bci); 2402 if (line_number == -2) { 2403 strcat(buf, "Native Method)"); 2404 } else { 2405 if (source_file_name != nullptr && (line_number != -1)) { 2406 // Sourcename and linenumber 2407 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number); 2408 } else if (source_file_name != nullptr) { 2409 // Just sourcename 2410 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name); 2411 } else { 2412 // Neither sourcename nor linenumber 2413 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)"); 2414 } 2415 CompiledMethod* nm = method->code(); 2416 if (WizardMode && nm != nullptr) { 2417 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 2418 } 2419 } 2420 } 2421 2422 st->print_cr("%s", buf); 2423 } 2424 2425 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) { 2426 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 2427 int method_id = method->orig_method_idnum(); 2428 int version = method->constants()->version(); 2429 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 2430 } 2431 2432 /** 2433 * Print the throwable message and its stack trace plus all causes by walking the 2434 * cause chain. The output looks the same as of Throwable.printStackTrace(). 2435 */ 2436 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 2437 // First, print the message. 2438 print(throwable(), st); 2439 st->cr(); 2440 2441 // Now print the stack trace. 2442 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2443 while (throwable.not_null()) { 2444 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 2445 if (result.is_null()) { 2446 st->print_raw_cr("\t<<no stack trace available>>"); 2447 return; 2448 } 2449 BacktraceIterator iter(result, THREAD); 2450 2451 while (iter.repeat()) { 2452 BacktraceElement bte = iter.next(THREAD); 2453 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 2454 } 2455 if (THREAD->can_call_java()) { 2456 // Call getCause() which doesn't necessarily return the _cause field. 2457 ExceptionMark em(THREAD); 2458 JavaValue cause(T_OBJECT); 2459 JavaCalls::call_virtual(&cause, 2460 throwable, 2461 throwable->klass(), 2462 vmSymbols::getCause_name(), 2463 vmSymbols::void_throwable_signature(), 2464 THREAD); 2465 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 2466 if (HAS_PENDING_EXCEPTION) { 2467 CLEAR_PENDING_EXCEPTION; 2468 throwable = Handle(); 2469 } else { 2470 throwable = Handle(THREAD, cause.get_oop()); 2471 if (throwable.not_null()) { 2472 st->print("Caused by: "); 2473 print(throwable(), st); 2474 st->cr(); 2475 } 2476 } 2477 } else { 2478 st->print_raw_cr("<<cannot call Java to get cause>>"); 2479 return; 2480 } 2481 } 2482 } 2483 2484 /** 2485 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 2486 */ 2487 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 2488 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected"); 2489 JavaValue result(T_VOID); 2490 JavaCalls::call_virtual(&result, 2491 throwable, 2492 vmClasses::Throwable_klass(), 2493 vmSymbols::printStackTrace_name(), 2494 vmSymbols::void_method_signature(), 2495 THREAD); 2496 } 2497 2498 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 2499 if (!StackTraceInThrowable) return; 2500 ResourceMark rm(THREAD); 2501 2502 // Start out by clearing the backtrace for this object, in case the VM 2503 // runs out of memory while allocating the stack trace 2504 set_backtrace(throwable(), nullptr); 2505 // Clear lazily constructed Java level stacktrace if refilling occurs 2506 // This is unnecessary in 1.7+ but harmless 2507 clear_stacktrace(throwable()); 2508 2509 int max_depth = MaxJavaStackTraceDepth; 2510 JavaThread* thread = THREAD; 2511 2512 BacktraceBuilder bt(CHECK); 2513 2514 // If there is no Java frame just return the method that was being called 2515 // with bci 0 2516 if (!thread->has_last_Java_frame()) { 2517 if (max_depth >= 1 && method() != nullptr) { 2518 bt.push(method(), 0, CHECK); 2519 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 2520 set_depth(throwable(), 1); 2521 set_backtrace(throwable(), bt.backtrace()); 2522 } 2523 return; 2524 } 2525 2526 // Instead of using vframe directly, this version of fill_in_stack_trace 2527 // basically handles everything by hand. This significantly improved the 2528 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 2529 // See bug 6333838 for more details. 2530 // The "ASSERT" here is to verify this method generates the exactly same stack 2531 // trace as utilizing vframe. 2532 #ifdef ASSERT 2533 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */); 2534 #endif 2535 int total_count = 0; 2536 RegisterMap map(thread, 2537 RegisterMap::UpdateMap::skip, 2538 RegisterMap::ProcessFrames::skip, 2539 RegisterMap::WalkContinuation::include); 2540 int decode_offset = 0; 2541 CompiledMethod* nm = nullptr; 2542 bool skip_fillInStackTrace_check = false; 2543 bool skip_throwableInit_check = false; 2544 bool skip_hidden = !ShowHiddenFrames; 2545 bool show_carrier = ShowCarrierFrames; 2546 ContinuationEntry* cont_entry = thread->last_continuation(); 2547 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 2548 Method* method = nullptr; 2549 int bci = 0; 2550 2551 // Compiled java method case. 2552 if (decode_offset != 0) { 2553 DebugInfoReadStream stream(nm, decode_offset); 2554 decode_offset = stream.read_int(); 2555 method = (Method*)nm->metadata_at(stream.read_int()); 2556 bci = stream.read_bci(); 2557 } else { 2558 if (fr.is_first_frame()) break; 2559 2560 if (Continuation::is_continuation_enterSpecial(fr)) { 2561 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), ""); 2562 if (!show_carrier && cont_entry->is_virtual_thread()) { 2563 break; 2564 } 2565 cont_entry = cont_entry->parent(); 2566 } 2567 2568 address pc = fr.pc(); 2569 if (fr.is_interpreted_frame()) { 2570 address bcp; 2571 if (!map.in_cont()) { 2572 bcp = fr.interpreter_frame_bcp(); 2573 method = fr.interpreter_frame_method(); 2574 } else { 2575 bcp = map.stack_chunk()->interpreter_frame_bcp(fr); 2576 method = map.stack_chunk()->interpreter_frame_method(fr); 2577 } 2578 bci = method->bci_from(bcp); 2579 fr = fr.sender(&map); 2580 } else { 2581 CodeBlob* cb = fr.cb(); 2582 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null 2583 // but non nmethod 2584 fr = fr.sender(&map); 2585 if (cb == nullptr || !cb->is_compiled()) { 2586 continue; 2587 } 2588 nm = cb->as_compiled_method(); 2589 assert(nm->method() != nullptr, "must be"); 2590 if (nm->method()->is_native()) { 2591 method = nm->method(); 2592 bci = 0; 2593 } else { 2594 PcDesc* pd = nm->pc_desc_at(pc); 2595 decode_offset = pd->scope_decode_offset(); 2596 // if decode_offset is not equal to 0, it will execute the 2597 // "compiled java method case" at the beginning of the loop. 2598 continue; 2599 } 2600 } 2601 } 2602 #ifdef ASSERT 2603 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace 2604 assert(st.method() == method && st.bci() == bci, "Wrong stack trace"); 2605 st.next(); 2606 } 2607 #endif 2608 2609 // the format of the stacktrace will be: 2610 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2611 // - 0 or more <init> methods for the exception class (skipped) 2612 // - rest of the stack 2613 2614 if (!skip_fillInStackTrace_check) { 2615 if (method->name() == vmSymbols::fillInStackTrace_name() && 2616 throwable->is_a(method->method_holder())) { 2617 continue; 2618 } 2619 else { 2620 skip_fillInStackTrace_check = true; // gone past them all 2621 } 2622 } 2623 if (!skip_throwableInit_check) { 2624 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2625 2626 // skip <init> methods of the exception class and superclasses 2627 // This is similar to classic VM. 2628 if (method->name() == vmSymbols::object_initializer_name() && 2629 throwable->is_a(method->method_holder())) { 2630 continue; 2631 } else { 2632 // there are none or we've seen them all - either way stop checking 2633 skip_throwableInit_check = true; 2634 } 2635 } 2636 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) { 2637 if (skip_hidden) { 2638 if (total_count == 0) { 2639 // The top frame will be hidden from the stack trace. 2640 bt.set_has_hidden_top_frame(); 2641 } 2642 continue; 2643 } 2644 } 2645 2646 bt.push(method, bci, CHECK); 2647 total_count++; 2648 } 2649 2650 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2651 2652 // Put completed stack trace into throwable object 2653 set_backtrace(throwable(), bt.backtrace()); 2654 set_depth(throwable(), total_count); 2655 } 2656 2657 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2658 // No-op if stack trace is disabled 2659 if (!StackTraceInThrowable) { 2660 return; 2661 } 2662 2663 // Disable stack traces for some preallocated out of memory errors 2664 if (!Universe::should_fill_in_stack_trace(throwable)) { 2665 return; 2666 } 2667 2668 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2669 PreserveExceptionMark pm(THREAD); 2670 2671 fill_in_stack_trace(throwable, method, THREAD); 2672 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the 2673 // original exception via the PreserveExceptionMark destructor. 2674 CLEAR_PENDING_EXCEPTION; 2675 } 2676 2677 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2678 // Allocate stack trace - backtrace is created but not filled in 2679 2680 // No-op if stack trace is disabled 2681 if (!StackTraceInThrowable) return; 2682 BacktraceBuilder bt(CHECK); // creates a backtrace 2683 set_backtrace(throwable(), bt.backtrace()); 2684 } 2685 2686 2687 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2688 // Fill in stack trace into preallocated backtrace (no GC) 2689 2690 // No-op if stack trace is disabled 2691 if (!StackTraceInThrowable) return; 2692 2693 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check"); 2694 2695 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2696 2697 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2698 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2699 2700 ResourceMark rm(THREAD); 2701 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */); 2702 2703 BacktraceBuilder bt(THREAD, backtrace); 2704 2705 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2706 // methods as preallocated errors aren't created by "java" code. 2707 2708 // fill in as much stack trace as possible 2709 int chunk_count = 0; 2710 for (;!st.at_end(); st.next()) { 2711 bt.push(st.method(), st.bci(), CHECK); 2712 chunk_count++; 2713 2714 // Bail-out for deep stacks 2715 if (chunk_count >= trace_chunk_size) break; 2716 } 2717 set_depth(throwable(), chunk_count); 2718 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2719 2720 // We support the Throwable immutability protocol defined for Java 7. 2721 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2722 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized"); 2723 } 2724 2725 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace, 2726 objArrayHandle stack_trace_array_h, TRAPS) { 2727 2728 if (backtrace.is_null() || stack_trace_array_h.is_null()) { 2729 THROW(vmSymbols::java_lang_NullPointerException()); 2730 } 2731 2732 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2733 2734 if (stack_trace_array_h->length() != depth) { 2735 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2736 } 2737 2738 objArrayHandle result(THREAD, objArrayOop(backtrace())); 2739 BacktraceIterator iter(result, THREAD); 2740 2741 int index = 0; 2742 while (iter.repeat()) { 2743 BacktraceElement bte = iter.next(THREAD); 2744 2745 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2746 2747 if (stack_trace_element.is_null()) { 2748 THROW(vmSymbols::java_lang_NullPointerException()); 2749 } 2750 2751 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2752 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2753 2754 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2755 method, 2756 bte._version, 2757 bte._bci, 2758 bte._name, 2759 CHECK); 2760 } 2761 } 2762 2763 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) { 2764 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization 2765 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive 2766 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and 2767 // symbolic stacktrace of 'throwable'. 2768 assert(throwable.not_null(), "shouldn't be"); 2769 2770 // Now create the message from the original exception and thread name. 2771 ResourceMark rm(current); 2772 const char *message = nullptr; 2773 oop detailed_message = java_lang_Throwable::message(throwable()); 2774 if (detailed_message != nullptr) { 2775 message = java_lang_String::as_utf8_string(detailed_message); 2776 } 2777 stringStream st; 2778 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(), 2779 message == nullptr ? "" : ":"); 2780 if (message == nullptr) { 2781 st.print("[in thread \"%s\"]", current->name()); 2782 } else { 2783 st.print("%s [in thread \"%s\"]", message, current->name()); 2784 } 2785 2786 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError(); 2787 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string()); 2788 // If new_exception returns a different exception while creating the exception, 2789 // abandon the attempt to save the initialization error and return null. 2790 if (init_error->klass()->name() != exception_name) { 2791 log_info(class, init)("Exception %s thrown while saving initialization exception", 2792 init_error->klass()->external_name()); 2793 return Handle(); 2794 } 2795 2796 // Call to java to fill in the stack trace and clear declaringClassObject to 2797 // not keep classes alive in the stack trace. 2798 // call this: public StackTraceElement[] getStackTrace() 2799 JavaValue result(T_ARRAY); 2800 JavaCalls::call_virtual(&result, throwable, 2801 vmClasses::Throwable_klass(), 2802 vmSymbols::getStackTrace_name(), 2803 vmSymbols::getStackTrace_signature(), 2804 current); 2805 if (!current->has_pending_exception()){ 2806 Handle stack_trace(current, result.get_oop()); 2807 assert(stack_trace->is_objArray(), "Should be an array"); 2808 java_lang_Throwable::set_stacktrace(init_error(), stack_trace()); 2809 // Clear backtrace because the stacktrace should be used instead. 2810 set_backtrace(init_error(), nullptr); 2811 } else { 2812 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s", 2813 init_error->klass()->external_name()); 2814 current->clear_pending_exception(); 2815 } 2816 2817 return init_error; 2818 } 2819 2820 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) { 2821 JavaThread* current = JavaThread::current(); 2822 objArrayHandle result(current, objArrayOop(backtrace(throwable))); 2823 BacktraceIterator iter(result, current); 2824 // No backtrace available. 2825 if (!iter.repeat()) return false; 2826 2827 // If the exception happened in a frame that has been hidden, i.e., 2828 // omitted from the back trace, we can not compute the message. 2829 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset); 2830 if (hidden != nullptr) { 2831 return false; 2832 } 2833 2834 // Get first backtrace element. 2835 BacktraceElement bte = iter.next(current); 2836 2837 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2838 assert(holder != nullptr, "first element should be non-null"); 2839 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version); 2840 2841 // Original version is no longer available. 2842 if (m == nullptr || !version_matches(m, bte._version)) { 2843 return false; 2844 } 2845 2846 *method = m; 2847 *bci = bte._bci; 2848 return true; 2849 } 2850 2851 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2852 // Allocate java.lang.StackTraceElement instance 2853 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 2854 assert(k != nullptr, "must be loaded in 1.4+"); 2855 if (k->should_be_initialized()) { 2856 k->initialize(CHECK_NULL); 2857 } 2858 2859 Handle element = k->allocate_instance_handle(CHECK_NULL); 2860 2861 int version = method->constants()->version(); 2862 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL); 2863 return element(); 2864 } 2865 2866 void java_lang_StackTraceElement::fill_in(Handle element, 2867 InstanceKlass* holder, const methodHandle& method, 2868 int version, int bci, Symbol* name, TRAPS) { 2869 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check"); 2870 2871 ResourceMark rm(THREAD); 2872 HandleMark hm(THREAD); 2873 2874 // Fill in class name 2875 Handle java_class(THREAD, holder->java_mirror()); 2876 oop classname = java_lang_Class::name(java_class, CHECK); 2877 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2878 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class()); 2879 2880 oop loader = holder->class_loader(); 2881 if (loader != nullptr) { 2882 oop loader_name = java_lang_ClassLoader::name(loader); 2883 if (loader_name != nullptr) 2884 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2885 } 2886 2887 // Fill in method name 2888 oop methodname = StringTable::intern(name, CHECK); 2889 java_lang_StackTraceElement::set_methodName(element(), methodname); 2890 2891 // Fill in module name and version 2892 ModuleEntry* module = holder->module(); 2893 if (module->is_named()) { 2894 oop module_name = StringTable::intern(module->name(), CHECK); 2895 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2896 oop module_version; 2897 if (module->version() != nullptr) { 2898 module_version = StringTable::intern(module->version(), CHECK); 2899 } else { 2900 module_version = nullptr; 2901 } 2902 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2903 } 2904 2905 if (method() == nullptr || !version_matches(method(), version)) { 2906 // The method was redefined, accurate line number information isn't available 2907 java_lang_StackTraceElement::set_fileName(element(), nullptr); 2908 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2909 } else { 2910 Symbol* source; 2911 oop source_file; 2912 int line_number; 2913 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK); 2914 2915 java_lang_StackTraceElement::set_fileName(element(), source_file); 2916 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2917 } 2918 } 2919 2920 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class, 2921 InstanceKlass* holder, 2922 int version, 2923 const methodHandle& method, 2924 int bci, 2925 Symbol*& source, 2926 oop& source_file, 2927 int& line_number, TRAPS) { 2928 // Fill in source file name and line number. 2929 source = Backtrace::get_source_file_name(holder, version); 2930 source_file = java_lang_Class::source_file(java_class()); 2931 if (source != nullptr) { 2932 // Class was not redefined. We can trust its cache if set, 2933 // else we have to initialize it. 2934 if (source_file == nullptr) { 2935 source_file = StringTable::intern(source, CHECK); 2936 java_lang_Class::set_source_file(java_class(), source_file); 2937 } 2938 } else { 2939 // Class was redefined. Dump the cache if it was set. 2940 if (source_file != nullptr) { 2941 source_file = nullptr; 2942 java_lang_Class::set_source_file(java_class(), source_file); 2943 } 2944 } 2945 line_number = Backtrace::get_line_number(method(), bci); 2946 } 2947 2948 #if INCLUDE_JVMCI 2949 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci, 2950 Symbol*& filename, int& line_number, TRAPS) { 2951 ResourceMark rm(THREAD); 2952 HandleMark hm(THREAD); 2953 2954 filename = nullptr; 2955 line_number = -1; 2956 2957 oop source_file; 2958 int version = method->constants()->version(); 2959 InstanceKlass* holder = method->method_holder(); 2960 Handle java_class(THREAD, holder->java_mirror()); 2961 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK); 2962 } 2963 #endif // INCLUDE_JVMCI 2964 2965 // java_lang_ClassFrameInfo 2966 2967 int java_lang_ClassFrameInfo::_classOrMemberName_offset; 2968 int java_lang_ClassFrameInfo::_flags_offset; 2969 2970 #define CLASSFRAMEINFO_FIELDS_DO(macro) \ 2971 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \ 2972 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false) 2973 2974 void java_lang_ClassFrameInfo::compute_offsets() { 2975 InstanceKlass* k = vmClasses::ClassFrameInfo_klass(); 2976 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2977 } 2978 2979 #if INCLUDE_CDS 2980 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) { 2981 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2982 } 2983 #endif 2984 2985 static int get_flags(const methodHandle& m) { 2986 int flags = (jushort)( m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS ); 2987 if (m->is_initializer()) { 2988 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR; 2989 } else { 2990 flags |= java_lang_invoke_MemberName::MN_IS_METHOD; 2991 } 2992 if (m->caller_sensitive()) { 2993 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE; 2994 } 2995 if (m->is_hidden()) { 2996 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER; 2997 } 2998 assert((flags & 0xFF000000) == 0, "unexpected flags"); 2999 return flags; 3000 } 3001 3002 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) { 3003 return obj->obj_field(_classOrMemberName_offset); 3004 } 3005 3006 int java_lang_ClassFrameInfo::flags(oop obj) { 3007 return obj->int_field(_flags_offset); 3008 } 3009 3010 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) { 3011 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror()); 3012 // flags is initialized when ClassFrameInfo object is constructed and retain the value 3013 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m); 3014 stackFrame->int_field_put(_flags_offset, flags); 3015 } 3016 3017 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) { 3018 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK); 3019 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name); 3020 // flags is initialized when ClassFrameInfo object is constructed and retain the value 3021 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m); 3022 stackFrame->int_field_put(_flags_offset, flags); 3023 } 3024 3025 3026 // java_lang_StackFrameInfo 3027 3028 int java_lang_StackFrameInfo::_type_offset; 3029 int java_lang_StackFrameInfo::_name_offset; 3030 int java_lang_StackFrameInfo::_bci_offset; 3031 int java_lang_StackFrameInfo::_version_offset; 3032 int java_lang_StackFrameInfo::_contScope_offset; 3033 3034 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 3035 macro(_type_offset, k, "type", object_signature, false); \ 3036 macro(_name_offset, k, "name", string_signature, false); \ 3037 macro(_bci_offset, k, "bci", int_signature, false); \ 3038 macro(_contScope_offset, k, "contScope", continuationscope_signature, false) 3039 3040 void java_lang_StackFrameInfo::compute_offsets() { 3041 InstanceKlass* k = vmClasses::StackFrameInfo_klass(); 3042 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3043 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3044 } 3045 3046 #if INCLUDE_CDS 3047 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) { 3048 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3049 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3050 } 3051 #endif 3052 3053 Method* java_lang_StackFrameInfo::get_method(oop obj) { 3054 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj); 3055 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m); 3056 return method; 3057 } 3058 3059 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) { 3060 // set Method* or mid/cpref 3061 HandleMark hm(THREAD); 3062 Handle cont_h(THREAD, cont); 3063 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK); 3064 3065 // set bci 3066 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 3067 // method may be redefined; store the version 3068 int version = method->constants()->version(); 3069 assert((jushort)version == version, "version should be short"); 3070 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 3071 3072 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr; 3073 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope); 3074 } 3075 3076 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 3077 ResourceMark rm(THREAD); 3078 HandleMark hm(THREAD); 3079 3080 Method* method = java_lang_StackFrameInfo::get_method(stackFrame()); 3081 InstanceKlass* holder = method->method_holder(); 3082 short version = stackFrame->short_field(_version_offset); 3083 int bci = stackFrame->int_field(_bci_offset); 3084 Symbol* name = method->name(); 3085 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK); 3086 } 3087 3088 oop java_lang_StackFrameInfo::type(oop obj) { 3089 return obj->obj_field(_type_offset); 3090 } 3091 3092 void java_lang_StackFrameInfo::set_type(oop obj, oop value) { 3093 obj->obj_field_put(_type_offset, value); 3094 } 3095 3096 oop java_lang_StackFrameInfo::name(oop obj) { 3097 return obj->obj_field(_name_offset); 3098 } 3099 3100 void java_lang_StackFrameInfo::set_name(oop obj, oop value) { 3101 obj->obj_field_put(_name_offset, value); 3102 } 3103 3104 void java_lang_StackFrameInfo::set_version(oop obj, short value) { 3105 obj->short_field_put(_version_offset, value); 3106 } 3107 3108 void java_lang_StackFrameInfo::set_bci(oop obj, int value) { 3109 assert(value >= 0 && value < max_jushort, "must be a valid bci value"); 3110 obj->int_field_put(_bci_offset, value); 3111 } 3112 3113 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) { 3114 obj->obj_field_put(_contScope_offset, value); 3115 } 3116 3117 int java_lang_LiveStackFrameInfo::_monitors_offset; 3118 int java_lang_LiveStackFrameInfo::_locals_offset; 3119 int java_lang_LiveStackFrameInfo::_operands_offset; 3120 int java_lang_LiveStackFrameInfo::_mode_offset; 3121 3122 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 3123 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 3124 macro(_locals_offset, k, "locals", object_array_signature, false); \ 3125 macro(_operands_offset, k, "operands", object_array_signature, false); \ 3126 macro(_mode_offset, k, "mode", int_signature, false) 3127 3128 void java_lang_LiveStackFrameInfo::compute_offsets() { 3129 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass(); 3130 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3131 } 3132 3133 #if INCLUDE_CDS 3134 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) { 3135 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3136 } 3137 #endif 3138 3139 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) { 3140 obj->obj_field_put(_monitors_offset, value); 3141 } 3142 3143 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) { 3144 obj->obj_field_put(_locals_offset, value); 3145 } 3146 3147 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) { 3148 obj->obj_field_put(_operands_offset, value); 3149 } 3150 3151 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) { 3152 obj->int_field_put(_mode_offset, value); 3153 } 3154 3155 3156 // java_lang_AccessibleObject 3157 3158 int java_lang_reflect_AccessibleObject::_override_offset; 3159 3160 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 3161 macro(_override_offset, k, "override", bool_signature, false) 3162 3163 void java_lang_reflect_AccessibleObject::compute_offsets() { 3164 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass(); 3165 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3166 } 3167 3168 #if INCLUDE_CDS 3169 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) { 3170 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3171 } 3172 #endif 3173 3174 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 3175 return (jboolean) reflect->bool_field(_override_offset); 3176 } 3177 3178 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 3179 reflect->bool_field_put(_override_offset, (int) value); 3180 } 3181 3182 // java_lang_reflect_Method 3183 3184 int java_lang_reflect_Method::_clazz_offset; 3185 int java_lang_reflect_Method::_name_offset; 3186 int java_lang_reflect_Method::_returnType_offset; 3187 int java_lang_reflect_Method::_parameterTypes_offset; 3188 int java_lang_reflect_Method::_exceptionTypes_offset; 3189 int java_lang_reflect_Method::_slot_offset; 3190 int java_lang_reflect_Method::_modifiers_offset; 3191 int java_lang_reflect_Method::_signature_offset; 3192 int java_lang_reflect_Method::_annotations_offset; 3193 int java_lang_reflect_Method::_parameter_annotations_offset; 3194 int java_lang_reflect_Method::_annotation_default_offset; 3195 3196 #define METHOD_FIELDS_DO(macro) \ 3197 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3198 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3199 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 3200 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 3201 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 3202 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3203 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3204 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3205 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 3206 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \ 3207 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false); 3208 3209 void java_lang_reflect_Method::compute_offsets() { 3210 InstanceKlass* k = vmClasses::reflect_Method_klass(); 3211 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3212 } 3213 3214 #if INCLUDE_CDS 3215 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) { 3216 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3217 } 3218 #endif 3219 3220 Handle java_lang_reflect_Method::create(TRAPS) { 3221 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3222 Klass* klass = vmClasses::reflect_Method_klass(); 3223 // This class is eagerly initialized during VM initialization, since we keep a reference 3224 // to one of the methods 3225 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 3226 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 3227 } 3228 3229 oop java_lang_reflect_Method::clazz(oop reflect) { 3230 return reflect->obj_field(_clazz_offset); 3231 } 3232 3233 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 3234 reflect->obj_field_put(_clazz_offset, value); 3235 } 3236 3237 int java_lang_reflect_Method::slot(oop reflect) { 3238 return reflect->int_field(_slot_offset); 3239 } 3240 3241 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 3242 reflect->int_field_put(_slot_offset, value); 3243 } 3244 3245 void java_lang_reflect_Method::set_name(oop method, oop value) { 3246 method->obj_field_put(_name_offset, value); 3247 } 3248 3249 oop java_lang_reflect_Method::return_type(oop method) { 3250 return method->obj_field(_returnType_offset); 3251 } 3252 3253 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 3254 method->obj_field_put(_returnType_offset, value); 3255 } 3256 3257 oop java_lang_reflect_Method::parameter_types(oop method) { 3258 return method->obj_field(_parameterTypes_offset); 3259 } 3260 3261 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 3262 method->obj_field_put(_parameterTypes_offset, value); 3263 } 3264 3265 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 3266 method->obj_field_put(_exceptionTypes_offset, value); 3267 } 3268 3269 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 3270 method->int_field_put(_modifiers_offset, value); 3271 } 3272 3273 void java_lang_reflect_Method::set_signature(oop method, oop value) { 3274 method->obj_field_put(_signature_offset, value); 3275 } 3276 3277 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 3278 method->obj_field_put(_annotations_offset, value); 3279 } 3280 3281 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 3282 method->obj_field_put(_parameter_annotations_offset, value); 3283 } 3284 3285 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 3286 method->obj_field_put(_annotation_default_offset, value); 3287 } 3288 3289 int java_lang_reflect_Constructor::_clazz_offset; 3290 int java_lang_reflect_Constructor::_parameterTypes_offset; 3291 int java_lang_reflect_Constructor::_exceptionTypes_offset; 3292 int java_lang_reflect_Constructor::_slot_offset; 3293 int java_lang_reflect_Constructor::_modifiers_offset; 3294 int java_lang_reflect_Constructor::_signature_offset; 3295 int java_lang_reflect_Constructor::_annotations_offset; 3296 int java_lang_reflect_Constructor::_parameter_annotations_offset; 3297 3298 #define CONSTRUCTOR_FIELDS_DO(macro) \ 3299 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3300 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 3301 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 3302 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3303 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3304 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3305 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 3306 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); 3307 3308 void java_lang_reflect_Constructor::compute_offsets() { 3309 InstanceKlass* k = vmClasses::reflect_Constructor_klass(); 3310 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3311 } 3312 3313 #if INCLUDE_CDS 3314 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) { 3315 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3316 } 3317 #endif 3318 3319 Handle java_lang_reflect_Constructor::create(TRAPS) { 3320 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3321 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 3322 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3323 InstanceKlass* ik = InstanceKlass::cast(k); 3324 // Ensure it is initialized 3325 ik->initialize(CHECK_NH); 3326 return ik->allocate_instance_handle(THREAD); 3327 } 3328 3329 oop java_lang_reflect_Constructor::clazz(oop reflect) { 3330 return reflect->obj_field(_clazz_offset); 3331 } 3332 3333 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 3334 reflect->obj_field_put(_clazz_offset, value); 3335 } 3336 3337 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 3338 return constructor->obj_field(_parameterTypes_offset); 3339 } 3340 3341 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 3342 constructor->obj_field_put(_parameterTypes_offset, value); 3343 } 3344 3345 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 3346 constructor->obj_field_put(_exceptionTypes_offset, value); 3347 } 3348 3349 int java_lang_reflect_Constructor::slot(oop reflect) { 3350 return reflect->int_field(_slot_offset); 3351 } 3352 3353 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 3354 reflect->int_field_put(_slot_offset, value); 3355 } 3356 3357 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 3358 constructor->int_field_put(_modifiers_offset, value); 3359 } 3360 3361 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 3362 constructor->obj_field_put(_signature_offset, value); 3363 } 3364 3365 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 3366 constructor->obj_field_put(_annotations_offset, value); 3367 } 3368 3369 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 3370 method->obj_field_put(_parameter_annotations_offset, value); 3371 } 3372 3373 int java_lang_reflect_Field::_clazz_offset; 3374 int java_lang_reflect_Field::_name_offset; 3375 int java_lang_reflect_Field::_type_offset; 3376 int java_lang_reflect_Field::_slot_offset; 3377 int java_lang_reflect_Field::_modifiers_offset; 3378 int java_lang_reflect_Field::_trusted_final_offset; 3379 int java_lang_reflect_Field::_signature_offset; 3380 int java_lang_reflect_Field::_annotations_offset; 3381 3382 #define FIELD_FIELDS_DO(macro) \ 3383 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3384 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3385 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \ 3386 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3387 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3388 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \ 3389 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3390 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); 3391 3392 void java_lang_reflect_Field::compute_offsets() { 3393 InstanceKlass* k = vmClasses::reflect_Field_klass(); 3394 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3395 } 3396 3397 #if INCLUDE_CDS 3398 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) { 3399 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3400 } 3401 #endif 3402 3403 Handle java_lang_reflect_Field::create(TRAPS) { 3404 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3405 Symbol* name = vmSymbols::java_lang_reflect_Field(); 3406 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3407 InstanceKlass* ik = InstanceKlass::cast(k); 3408 // Ensure it is initialized 3409 ik->initialize(CHECK_NH); 3410 return ik->allocate_instance_handle(THREAD); 3411 } 3412 3413 oop java_lang_reflect_Field::clazz(oop reflect) { 3414 return reflect->obj_field(_clazz_offset); 3415 } 3416 3417 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 3418 reflect->obj_field_put(_clazz_offset, value); 3419 } 3420 3421 oop java_lang_reflect_Field::name(oop field) { 3422 return field->obj_field(_name_offset); 3423 } 3424 3425 void java_lang_reflect_Field::set_name(oop field, oop value) { 3426 field->obj_field_put(_name_offset, value); 3427 } 3428 3429 oop java_lang_reflect_Field::type(oop field) { 3430 return field->obj_field(_type_offset); 3431 } 3432 3433 void java_lang_reflect_Field::set_type(oop field, oop value) { 3434 field->obj_field_put(_type_offset, value); 3435 } 3436 3437 int java_lang_reflect_Field::slot(oop reflect) { 3438 return reflect->int_field(_slot_offset); 3439 } 3440 3441 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 3442 reflect->int_field_put(_slot_offset, value); 3443 } 3444 3445 int java_lang_reflect_Field::modifiers(oop field) { 3446 return field->int_field(_modifiers_offset); 3447 } 3448 3449 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 3450 field->int_field_put(_modifiers_offset, value); 3451 } 3452 3453 void java_lang_reflect_Field::set_trusted_final(oop field) { 3454 field->bool_field_put(_trusted_final_offset, true); 3455 } 3456 3457 void java_lang_reflect_Field::set_signature(oop field, oop value) { 3458 field->obj_field_put(_signature_offset, value); 3459 } 3460 3461 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 3462 field->obj_field_put(_annotations_offset, value); 3463 } 3464 3465 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) { 3466 // Allocate java.lang.reflect.RecordComponent instance 3467 HandleMark hm(THREAD); 3468 InstanceKlass* ik = vmClasses::RecordComponent_klass(); 3469 assert(ik != nullptr, "must be loaded"); 3470 ik->initialize(CHECK_NULL); 3471 3472 Handle element = ik->allocate_instance_handle(CHECK_NULL); 3473 3474 Handle decl_class(THREAD, holder->java_mirror()); 3475 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class()); 3476 3477 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8 3478 oop component_name = StringTable::intern(name, CHECK_NULL); 3479 java_lang_reflect_RecordComponent::set_name(element(), component_name); 3480 3481 Symbol* type = holder->constants()->symbol_at(component->descriptor_index()); 3482 Handle component_type_h = 3483 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL); 3484 java_lang_reflect_RecordComponent::set_type(element(), component_type_h()); 3485 3486 Method* accessor_method = nullptr; 3487 { 3488 // Prepend "()" to type to create the full method signature. 3489 ResourceMark rm(THREAD); 3490 int sig_len = type->utf8_length() + 3; // "()" and null char 3491 char* sig = NEW_RESOURCE_ARRAY(char, sig_len); 3492 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string()); 3493 TempNewSymbol full_sig = SymbolTable::new_symbol(sig); 3494 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find); 3495 } 3496 3497 if (accessor_method != nullptr) { 3498 methodHandle method(THREAD, accessor_method); 3499 oop m = Reflection::new_method(method, false, CHECK_NULL); 3500 java_lang_reflect_RecordComponent::set_accessor(element(), m); 3501 } else { 3502 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr); 3503 } 3504 3505 int sig_index = component->generic_signature_index(); 3506 if (sig_index > 0) { 3507 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8 3508 oop component_sig = StringTable::intern(sig, CHECK_NULL); 3509 java_lang_reflect_RecordComponent::set_signature(element(), component_sig); 3510 } else { 3511 java_lang_reflect_RecordComponent::set_signature(element(), nullptr); 3512 } 3513 3514 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL); 3515 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop); 3516 3517 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL); 3518 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop); 3519 3520 return element(); 3521 } 3522 3523 int reflect_ConstantPool::_oop_offset; 3524 3525 #define CONSTANTPOOL_FIELDS_DO(macro) \ 3526 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 3527 3528 void reflect_ConstantPool::compute_offsets() { 3529 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass(); 3530 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3531 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3532 } 3533 3534 #if INCLUDE_CDS 3535 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) { 3536 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3537 } 3538 #endif 3539 3540 int java_lang_reflect_Parameter::_name_offset; 3541 int java_lang_reflect_Parameter::_modifiers_offset; 3542 int java_lang_reflect_Parameter::_index_offset; 3543 int java_lang_reflect_Parameter::_executable_offset; 3544 3545 #define PARAMETER_FIELDS_DO(macro) \ 3546 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3547 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3548 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3549 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3550 3551 void java_lang_reflect_Parameter::compute_offsets() { 3552 InstanceKlass* k = vmClasses::reflect_Parameter_klass(); 3553 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3554 } 3555 3556 #if INCLUDE_CDS 3557 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) { 3558 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3559 } 3560 #endif 3561 3562 Handle java_lang_reflect_Parameter::create(TRAPS) { 3563 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3564 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3565 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3566 InstanceKlass* ik = InstanceKlass::cast(k); 3567 // Ensure it is initialized 3568 ik->initialize(CHECK_NH); 3569 return ik->allocate_instance_handle(THREAD); 3570 } 3571 3572 oop java_lang_reflect_Parameter::name(oop param) { 3573 return param->obj_field(_name_offset); 3574 } 3575 3576 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3577 param->obj_field_put(_name_offset, value); 3578 } 3579 3580 int java_lang_reflect_Parameter::modifiers(oop param) { 3581 return param->int_field(_modifiers_offset); 3582 } 3583 3584 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3585 param->int_field_put(_modifiers_offset, value); 3586 } 3587 3588 int java_lang_reflect_Parameter::index(oop param) { 3589 return param->int_field(_index_offset); 3590 } 3591 3592 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3593 param->int_field_put(_index_offset, value); 3594 } 3595 3596 oop java_lang_reflect_Parameter::executable(oop param) { 3597 return param->obj_field(_executable_offset); 3598 } 3599 3600 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3601 param->obj_field_put(_executable_offset, value); 3602 } 3603 3604 // java_lang_Module 3605 3606 int java_lang_Module::_loader_offset; 3607 int java_lang_Module::_name_offset; 3608 int java_lang_Module::_module_entry_offset; 3609 3610 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3611 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3612 return JavaCalls::construct_new_instance(vmClasses::Module_klass(), 3613 vmSymbols::java_lang_module_init_signature(), 3614 loader, module_name, CHECK_NH); 3615 } 3616 3617 #define MODULE_FIELDS_DO(macro) \ 3618 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3619 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false) 3620 3621 void java_lang_Module::compute_offsets() { 3622 InstanceKlass* k = vmClasses::Module_klass(); 3623 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3624 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3625 } 3626 3627 #if INCLUDE_CDS 3628 void java_lang_Module::serialize_offsets(SerializeClosure* f) { 3629 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3630 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3631 } 3632 #endif 3633 3634 oop java_lang_Module::loader(oop module) { 3635 return module->obj_field(_loader_offset); 3636 } 3637 3638 void java_lang_Module::set_loader(oop module, oop value) { 3639 module->obj_field_put(_loader_offset, value); 3640 } 3641 3642 oop java_lang_Module::name(oop module) { 3643 return module->obj_field(_name_offset); 3644 } 3645 3646 void java_lang_Module::set_name(oop module, oop value) { 3647 module->obj_field_put(_name_offset, value); 3648 } 3649 3650 ModuleEntry* java_lang_Module::module_entry_raw(oop module) { 3651 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 3652 assert(module != nullptr, "module can't be null"); 3653 assert(oopDesc::is_oop(module), "module must be oop"); 3654 3655 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3656 return module_entry; 3657 } 3658 3659 ModuleEntry* java_lang_Module::module_entry(oop module) { 3660 ModuleEntry* module_entry = module_entry_raw(module); 3661 if (module_entry == nullptr) { 3662 // If the inject field containing the ModuleEntry* is null then return the 3663 // class loader's unnamed module. 3664 oop loader = java_lang_Module::loader(module); 3665 Handle h_loader = Handle(Thread::current(), loader); 3666 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3667 return loader_cld->unnamed_module(); 3668 } 3669 return module_entry; 3670 } 3671 3672 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3673 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 3674 assert(module != nullptr, "module can't be null"); 3675 assert(oopDesc::is_oop(module), "module must be oop"); 3676 module->address_field_put(_module_entry_offset, (address)module_entry); 3677 } 3678 3679 Handle reflect_ConstantPool::create(TRAPS) { 3680 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3681 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass(); 3682 // Ensure it is initialized 3683 k->initialize(CHECK_NH); 3684 return k->allocate_instance_handle(THREAD); 3685 } 3686 3687 3688 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3689 oop mirror = value->pool_holder()->java_mirror(); 3690 // Save the mirror to get back the constant pool. 3691 reflect->obj_field_put(_oop_offset, mirror); 3692 } 3693 3694 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3695 3696 oop mirror = reflect->obj_field(_oop_offset); 3697 Klass* k = java_lang_Class::as_Klass(mirror); 3698 assert(k->is_instance_klass(), "Must be"); 3699 3700 // Get the constant pool back from the klass. Since class redefinition 3701 // merges the new constant pool into the old, this is essentially the 3702 // same constant pool as the original. If constant pool merging is 3703 // no longer done in the future, this will have to change to save 3704 // the original. 3705 return InstanceKlass::cast(k)->constants(); 3706 } 3707 3708 3709 // Support for java_lang_ref_Reference 3710 3711 bool java_lang_ref_Reference::_offsets_initialized; 3712 3713 int java_lang_ref_Reference::_referent_offset; 3714 int java_lang_ref_Reference::_queue_offset; 3715 int java_lang_ref_Reference::_next_offset; 3716 int java_lang_ref_Reference::_discovered_offset; 3717 3718 #define REFERENCE_FIELDS_DO(macro) \ 3719 macro(_referent_offset, k, "referent", object_signature, false); \ 3720 macro(_queue_offset, k, "queue", referencequeue_signature, false); \ 3721 macro(_next_offset, k, "next", reference_signature, false); \ 3722 macro(_discovered_offset, k, "discovered", reference_signature, false); 3723 3724 void java_lang_ref_Reference::compute_offsets() { 3725 if (_offsets_initialized) { 3726 return; 3727 } 3728 _offsets_initialized = true; 3729 InstanceKlass* k = vmClasses::Reference_klass(); 3730 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3731 } 3732 3733 #if INCLUDE_CDS 3734 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) { 3735 f->do_bool(&_offsets_initialized); 3736 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3737 } 3738 #endif 3739 3740 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3741 assert(obj != nullptr, "sanity"); 3742 if (offset != _referent_offset) { 3743 return false; 3744 } 3745 3746 Klass* k = obj->klass(); 3747 if (!k->is_instance_klass()) { 3748 return false; 3749 } 3750 3751 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3752 bool is_reference = ik->reference_type() != REF_NONE; 3753 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity"); 3754 return is_reference; 3755 } 3756 3757 int java_lang_boxing_object::_value_offset; 3758 int java_lang_boxing_object::_long_value_offset; 3759 3760 #define BOXING_FIELDS_DO(macro) \ 3761 macro(_value_offset, integerKlass, "value", int_signature, false); \ 3762 macro(_long_value_offset, longKlass, "value", long_signature, false); 3763 3764 void java_lang_boxing_object::compute_offsets() { 3765 InstanceKlass* integerKlass = vmClasses::Integer_klass(); 3766 InstanceKlass* longKlass = vmClasses::Long_klass(); 3767 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3768 } 3769 3770 #if INCLUDE_CDS 3771 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) { 3772 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3773 } 3774 #endif 3775 3776 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 3777 Klass* k = vmClasses::box_klass(type); 3778 if (k == nullptr) return nullptr; 3779 InstanceKlass* ik = InstanceKlass::cast(k); 3780 if (!ik->is_initialized()) { 3781 ik->initialize(CHECK_NULL); 3782 } 3783 return ik->allocate_instance(THREAD); 3784 } 3785 3786 3787 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 3788 oop box = initialize_and_allocate(type, CHECK_NULL); 3789 if (box == nullptr) return nullptr; 3790 switch (type) { 3791 case T_BOOLEAN: 3792 box->bool_field_put(_value_offset, value->z); 3793 break; 3794 case T_CHAR: 3795 box->char_field_put(_value_offset, value->c); 3796 break; 3797 case T_FLOAT: 3798 box->float_field_put(_value_offset, value->f); 3799 break; 3800 case T_DOUBLE: 3801 box->double_field_put(_long_value_offset, value->d); 3802 break; 3803 case T_BYTE: 3804 box->byte_field_put(_value_offset, value->b); 3805 break; 3806 case T_SHORT: 3807 box->short_field_put(_value_offset, value->s); 3808 break; 3809 case T_INT: 3810 box->int_field_put(_value_offset, value->i); 3811 break; 3812 case T_LONG: 3813 box->long_field_put(_long_value_offset, value->j); 3814 break; 3815 default: 3816 return nullptr; 3817 } 3818 return box; 3819 } 3820 3821 3822 BasicType java_lang_boxing_object::basic_type(oop box) { 3823 if (box == nullptr) return T_ILLEGAL; 3824 BasicType type = vmClasses::box_klass_type(box->klass()); 3825 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 3826 return T_ILLEGAL; 3827 return type; 3828 } 3829 3830 3831 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 3832 BasicType type = vmClasses::box_klass_type(box->klass()); 3833 switch (type) { 3834 case T_BOOLEAN: 3835 value->z = box->bool_field(_value_offset); 3836 break; 3837 case T_CHAR: 3838 value->c = box->char_field(_value_offset); 3839 break; 3840 case T_FLOAT: 3841 value->f = box->float_field(_value_offset); 3842 break; 3843 case T_DOUBLE: 3844 value->d = box->double_field(_long_value_offset); 3845 break; 3846 case T_BYTE: 3847 value->b = box->byte_field(_value_offset); 3848 break; 3849 case T_SHORT: 3850 value->s = box->short_field(_value_offset); 3851 break; 3852 case T_INT: 3853 value->i = box->int_field(_value_offset); 3854 break; 3855 case T_LONG: 3856 value->j = box->long_field(_long_value_offset); 3857 break; 3858 default: 3859 return T_ILLEGAL; 3860 } // end switch 3861 return type; 3862 } 3863 3864 3865 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3866 BasicType type = vmClasses::box_klass_type(box->klass()); 3867 switch (type) { 3868 case T_BOOLEAN: 3869 box->bool_field_put(_value_offset, value->z); 3870 break; 3871 case T_CHAR: 3872 box->char_field_put(_value_offset, value->c); 3873 break; 3874 case T_FLOAT: 3875 box->float_field_put(_value_offset, value->f); 3876 break; 3877 case T_DOUBLE: 3878 box->double_field_put(_long_value_offset, value->d); 3879 break; 3880 case T_BYTE: 3881 box->byte_field_put(_value_offset, value->b); 3882 break; 3883 case T_SHORT: 3884 box->short_field_put(_value_offset, value->s); 3885 break; 3886 case T_INT: 3887 box->int_field_put(_value_offset, value->i); 3888 break; 3889 case T_LONG: 3890 box->long_field_put(_long_value_offset, value->j); 3891 break; 3892 default: 3893 return T_ILLEGAL; 3894 } // end switch 3895 return type; 3896 } 3897 3898 3899 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3900 switch (type) { 3901 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3902 case T_CHAR: st->print("%d", value->c); break; 3903 case T_BYTE: st->print("%d", value->b); break; 3904 case T_SHORT: st->print("%d", value->s); break; 3905 case T_INT: st->print("%d", value->i); break; 3906 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 3907 case T_FLOAT: st->print("%f", value->f); break; 3908 case T_DOUBLE: st->print("%lf", value->d); break; 3909 default: st->print("type %d?", type); break; 3910 } 3911 } 3912 3913 3914 // Support for java_lang_ref_SoftReference 3915 // 3916 3917 int java_lang_ref_SoftReference::_timestamp_offset; 3918 int java_lang_ref_SoftReference::_static_clock_offset; 3919 3920 #define SOFTREFERENCE_FIELDS_DO(macro) \ 3921 macro(_timestamp_offset, k, "timestamp", long_signature, false); \ 3922 macro(_static_clock_offset, k, "clock", long_signature, true) 3923 3924 void java_lang_ref_SoftReference::compute_offsets() { 3925 InstanceKlass* k = vmClasses::SoftReference_klass(); 3926 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3927 } 3928 3929 #if INCLUDE_CDS 3930 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) { 3931 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3932 } 3933 #endif 3934 3935 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3936 return ref->long_field(_timestamp_offset); 3937 } 3938 3939 jlong java_lang_ref_SoftReference::clock() { 3940 InstanceKlass* ik = vmClasses::SoftReference_klass(); 3941 oop base = ik->static_field_base_raw(); 3942 return base->long_field(_static_clock_offset); 3943 } 3944 3945 void java_lang_ref_SoftReference::set_clock(jlong value) { 3946 InstanceKlass* ik = vmClasses::SoftReference_klass(); 3947 oop base = ik->static_field_base_raw(); 3948 base->long_field_put(_static_clock_offset, value); 3949 } 3950 3951 // Support for java_lang_invoke_DirectMethodHandle 3952 3953 int java_lang_invoke_DirectMethodHandle::_member_offset; 3954 3955 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3956 oop member_name = nullptr; 3957 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 3958 "a DirectMethodHandle oop is expected"); 3959 return dmh->obj_field(_member_offset); 3960 } 3961 3962 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 3963 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 3964 3965 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3966 InstanceKlass* k = vmClasses::DirectMethodHandle_klass(); 3967 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3968 } 3969 3970 #if INCLUDE_CDS 3971 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) { 3972 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3973 } 3974 #endif 3975 3976 // Support for java_lang_invoke_MethodHandle 3977 3978 int java_lang_invoke_MethodHandle::_type_offset; 3979 int java_lang_invoke_MethodHandle::_form_offset; 3980 3981 int java_lang_invoke_MemberName::_clazz_offset; 3982 int java_lang_invoke_MemberName::_name_offset; 3983 int java_lang_invoke_MemberName::_type_offset; 3984 int java_lang_invoke_MemberName::_flags_offset; 3985 int java_lang_invoke_MemberName::_method_offset; 3986 int java_lang_invoke_MemberName::_vmindex_offset; 3987 3988 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 3989 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 3990 3991 int java_lang_invoke_LambdaForm::_vmentry_offset; 3992 3993 #define METHODHANDLE_FIELDS_DO(macro) \ 3994 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 3995 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 3996 3997 void java_lang_invoke_MethodHandle::compute_offsets() { 3998 InstanceKlass* k = vmClasses::MethodHandle_klass(); 3999 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4000 } 4001 4002 #if INCLUDE_CDS 4003 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) { 4004 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4005 } 4006 #endif 4007 4008 #define MEMBERNAME_FIELDS_DO(macro) \ 4009 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 4010 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 4011 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 4012 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 4013 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 4014 4015 void java_lang_invoke_MemberName::compute_offsets() { 4016 InstanceKlass* k = vmClasses::MemberName_klass(); 4017 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4018 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4019 } 4020 4021 #if INCLUDE_CDS 4022 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) { 4023 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4024 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4025 } 4026 #endif 4027 4028 #define RESOLVEDMETHOD_FIELDS_DO(macro) \ 4029 macro(_vmholder_offset, k, "vmholder", class_signature, false) 4030 4031 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 4032 InstanceKlass* k = vmClasses::ResolvedMethodName_klass(); 4033 assert(k != nullptr, "jdk mismatch"); 4034 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4035 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4036 } 4037 4038 #if INCLUDE_CDS 4039 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) { 4040 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4041 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4042 } 4043 #endif 4044 4045 #define LAMBDAFORM_FIELDS_DO(macro) \ 4046 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 4047 4048 void java_lang_invoke_LambdaForm::compute_offsets() { 4049 InstanceKlass* k = vmClasses::LambdaForm_klass(); 4050 assert (k != nullptr, "jdk mismatch"); 4051 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4052 } 4053 4054 #if INCLUDE_CDS 4055 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) { 4056 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4057 } 4058 #endif 4059 4060 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 4061 return obj != nullptr && is_subclass(obj->klass()); 4062 } 4063 4064 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset; 4065 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset; 4066 4067 #define NEP_FIELDS_DO(macro) \ 4068 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \ 4069 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false); 4070 4071 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) { 4072 return obj != nullptr && is_subclass(obj->klass()); 4073 } 4074 4075 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() { 4076 InstanceKlass* k = vmClasses::NativeEntryPoint_klass(); 4077 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4078 } 4079 4080 #if INCLUDE_CDS 4081 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) { 4082 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4083 } 4084 #endif 4085 4086 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) { 4087 return entry->obj_field(_method_type_offset); 4088 } 4089 4090 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) { 4091 return entry->long_field(_downcall_stub_address_offset); 4092 } 4093 4094 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset; 4095 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset; 4096 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset; 4097 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset; 4098 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset; 4099 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset; 4100 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset; 4101 4102 #define ABIDescriptor_FIELDS_DO(macro) \ 4103 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4104 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4105 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4106 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \ 4107 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \ 4108 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \ 4109 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false); 4110 4111 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) { 4112 return obj != nullptr && is_subclass(obj->klass()); 4113 } 4114 4115 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() { 4116 InstanceKlass* k = vmClasses::ABIDescriptor_klass(); 4117 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4118 } 4119 4120 #if INCLUDE_CDS 4121 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) { 4122 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4123 } 4124 #endif 4125 4126 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) { 4127 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset)); 4128 } 4129 4130 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) { 4131 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset)); 4132 } 4133 4134 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) { 4135 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset)); 4136 } 4137 4138 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) { 4139 return entry->int_field(_stackAlignment_offset); 4140 } 4141 4142 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) { 4143 return entry->int_field(_shadowSpace_offset); 4144 } 4145 4146 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) { 4147 return entry->obj_field(_scratch1_offset); 4148 } 4149 4150 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) { 4151 return entry->obj_field(_scratch2_offset); 4152 } 4153 4154 int jdk_internal_foreign_abi_VMStorage::_type_offset; 4155 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset; 4156 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset; 4157 int jdk_internal_foreign_abi_VMStorage::_debugName_offset; 4158 4159 #define VMStorage_FIELDS_DO(macro) \ 4160 macro(_type_offset, k, "type", byte_signature, false); \ 4161 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \ 4162 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \ 4163 macro(_debugName_offset, k, "debugName", string_signature, false); \ 4164 4165 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) { 4166 return obj != nullptr && is_subclass(obj->klass()); 4167 } 4168 4169 void jdk_internal_foreign_abi_VMStorage::compute_offsets() { 4170 InstanceKlass* k = vmClasses::VMStorage_klass(); 4171 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4172 } 4173 4174 #if INCLUDE_CDS 4175 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) { 4176 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4177 } 4178 #endif 4179 4180 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) { 4181 return entry->byte_field(_type_offset); 4182 } 4183 4184 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) { 4185 return entry->int_field(_indexOrOffset_offset); 4186 } 4187 4188 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) { 4189 return entry->short_field(_segmentMaskOrSize_offset); 4190 } 4191 4192 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) { 4193 return entry->obj_field(_debugName_offset); 4194 } 4195 4196 int jdk_internal_foreign_abi_CallConv::_argRegs_offset; 4197 int jdk_internal_foreign_abi_CallConv::_retRegs_offset; 4198 4199 #define CallConv_FIELDS_DO(macro) \ 4200 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \ 4201 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \ 4202 4203 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) { 4204 return obj != nullptr && is_subclass(obj->klass()); 4205 } 4206 4207 void jdk_internal_foreign_abi_CallConv::compute_offsets() { 4208 InstanceKlass* k = vmClasses::CallConv_klass(); 4209 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4210 } 4211 4212 #if INCLUDE_CDS 4213 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) { 4214 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4215 } 4216 #endif 4217 4218 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) { 4219 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset)); 4220 } 4221 4222 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) { 4223 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset)); 4224 } 4225 4226 oop java_lang_invoke_MethodHandle::type(oop mh) { 4227 return mh->obj_field(_type_offset); 4228 } 4229 4230 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 4231 mh->obj_field_put(_type_offset, mtype); 4232 } 4233 4234 oop java_lang_invoke_MethodHandle::form(oop mh) { 4235 assert(_form_offset != 0, ""); 4236 return mh->obj_field(_form_offset); 4237 } 4238 4239 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 4240 assert(_form_offset != 0, ""); 4241 mh->obj_field_put(_form_offset, lform); 4242 } 4243 4244 /// MemberName accessors 4245 4246 oop java_lang_invoke_MemberName::clazz(oop mname) { 4247 assert(is_instance(mname), "wrong type"); 4248 return mname->obj_field(_clazz_offset); 4249 } 4250 4251 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 4252 assert(is_instance(mname), "wrong type"); 4253 mname->obj_field_put(_clazz_offset, clazz); 4254 } 4255 4256 oop java_lang_invoke_MemberName::name(oop mname) { 4257 assert(is_instance(mname), "wrong type"); 4258 return mname->obj_field(_name_offset); 4259 } 4260 4261 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 4262 assert(is_instance(mname), "wrong type"); 4263 mname->obj_field_put(_name_offset, name); 4264 } 4265 4266 oop java_lang_invoke_MemberName::type(oop mname) { 4267 assert(is_instance(mname), "wrong type"); 4268 return mname->obj_field(_type_offset); 4269 } 4270 4271 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 4272 assert(is_instance(mname), "wrong type"); 4273 mname->obj_field_put(_type_offset, type); 4274 } 4275 4276 int java_lang_invoke_MemberName::flags(oop mname) { 4277 assert(is_instance(mname), "wrong type"); 4278 return mname->int_field(_flags_offset); 4279 } 4280 4281 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 4282 assert(is_instance(mname), "wrong type"); 4283 mname->int_field_put(_flags_offset, flags); 4284 } 4285 4286 4287 // Return vmtarget from ResolvedMethodName method field through indirection 4288 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 4289 assert(is_instance(mname), "wrong type"); 4290 oop method = mname->obj_field(_method_offset); 4291 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method); 4292 } 4293 4294 bool java_lang_invoke_MemberName::is_method(oop mname) { 4295 assert(is_instance(mname), "must be MemberName"); 4296 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 4297 } 4298 4299 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 4300 assert(is_instance(mname), "wrong type"); 4301 mname->obj_field_put(_method_offset, resolved_method); 4302 } 4303 4304 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 4305 assert(is_instance(mname), "wrong type"); 4306 return (intptr_t) mname->address_field(_vmindex_offset); 4307 } 4308 4309 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 4310 assert(is_instance(mname), "wrong type"); 4311 mname->address_field_put(_vmindex_offset, (address) index); 4312 } 4313 4314 4315 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 4316 assert(is_instance(resolved_method), "wrong type"); 4317 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 4318 assert(m->is_method(), "must be"); 4319 return m; 4320 } 4321 4322 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 4323 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 4324 assert(is_instance(resolved_method), "wrong type"); 4325 resolved_method->address_field_put(_vmtarget_offset, (address)m); 4326 } 4327 4328 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) { 4329 assert(is_instance(resolved_method), "wrong type"); 4330 resolved_method->obj_field_put(_vmholder_offset, holder); 4331 } 4332 4333 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 4334 const Method* method = m(); 4335 4336 // lookup ResolvedMethod oop in the table, or create a new one and intern it 4337 oop resolved_method = ResolvedMethodTable::find_method(method); 4338 if (resolved_method != nullptr) { 4339 return resolved_method; 4340 } 4341 4342 InstanceKlass* k = vmClasses::ResolvedMethodName_klass(); 4343 if (!k->is_initialized()) { 4344 k->initialize(CHECK_NULL); 4345 } 4346 4347 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 4348 4349 NoSafepointVerifier nsv; 4350 4351 if (method->is_old()) { 4352 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() : 4353 method->get_new_method(); 4354 } 4355 4356 InstanceKlass* holder = method->method_holder(); 4357 4358 set_vmtarget(new_resolved_method, const_cast<Method*>(method)); 4359 // Add a reference to the loader (actually mirror because hidden classes may not have 4360 // distinct loaders) to ensure the metadata is kept alive. 4361 // This mirror may be different than the one in clazz field. 4362 set_vmholder(new_resolved_method, holder->java_mirror()); 4363 4364 // Set flag in class to indicate this InstanceKlass has entries in the table 4365 // to avoid walking table during redefinition if none of the redefined classes 4366 // have any membernames in the table. 4367 holder->set_has_resolved_methods(); 4368 4369 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method)); 4370 } 4371 4372 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 4373 assert(is_instance(lform), "wrong type"); 4374 return lform->obj_field(_vmentry_offset); 4375 } 4376 4377 4378 // Support for java_lang_invoke_MethodType 4379 4380 int java_lang_invoke_MethodType::_rtype_offset; 4381 int java_lang_invoke_MethodType::_ptypes_offset; 4382 4383 #define METHODTYPE_FIELDS_DO(macro) \ 4384 macro(_rtype_offset, k, "rtype", class_signature, false); \ 4385 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 4386 4387 void java_lang_invoke_MethodType::compute_offsets() { 4388 InstanceKlass* k = vmClasses::MethodType_klass(); 4389 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4390 } 4391 4392 #if INCLUDE_CDS 4393 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) { 4394 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4395 } 4396 #endif 4397 4398 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 4399 st->print("("); 4400 objArrayOop pts = ptypes(mt); 4401 if (pts != nullptr) { 4402 for (int i = 0, limit = pts->length(); i < limit; i++) { 4403 java_lang_Class::print_signature(pts->obj_at(i), st); 4404 } 4405 } else { 4406 st->print("null"); 4407 } 4408 st->print(")"); 4409 oop rt = rtype(mt); 4410 if (rt != nullptr) { 4411 java_lang_Class::print_signature(rt, st); 4412 } else { 4413 st->print("null"); 4414 } 4415 } 4416 4417 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) { 4418 ResourceMark rm; 4419 stringStream buffer(128); 4420 print_signature(mt, &buffer); 4421 const char* sigstr = buffer.base(); 4422 int siglen = (int) buffer.size(); 4423 Symbol *name; 4424 if (!intern_if_not_found) { 4425 name = SymbolTable::probe(sigstr, siglen); 4426 } else { 4427 name = SymbolTable::new_symbol(sigstr, siglen); 4428 } 4429 return name; 4430 } 4431 4432 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 4433 if (mt1 == mt2) 4434 return true; 4435 if (rtype(mt1) != rtype(mt2)) 4436 return false; 4437 if (ptype_count(mt1) != ptype_count(mt2)) 4438 return false; 4439 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 4440 if (ptype(mt1, i) != ptype(mt2, i)) 4441 return false; 4442 } 4443 return true; 4444 } 4445 4446 oop java_lang_invoke_MethodType::rtype(oop mt) { 4447 assert(is_instance(mt), "must be a MethodType"); 4448 return mt->obj_field(_rtype_offset); 4449 } 4450 4451 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 4452 assert(is_instance(mt), "must be a MethodType"); 4453 return (objArrayOop) mt->obj_field(_ptypes_offset); 4454 } 4455 4456 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 4457 return ptypes(mt)->obj_at(idx); 4458 } 4459 4460 int java_lang_invoke_MethodType::ptype_count(oop mt) { 4461 return ptypes(mt)->length(); 4462 } 4463 4464 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 4465 objArrayOop pts = ptypes(mt); 4466 int count = pts->length(); 4467 int slots = 0; 4468 for (int i = 0; i < count; i++) { 4469 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 4470 slots += type2size[bt]; 4471 } 4472 return slots; 4473 } 4474 4475 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 4476 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 4477 return type2size[bt]; 4478 } 4479 4480 4481 // Support for java_lang_invoke_CallSite 4482 4483 int java_lang_invoke_CallSite::_target_offset; 4484 int java_lang_invoke_CallSite::_context_offset; 4485 4486 #define CALLSITE_FIELDS_DO(macro) \ 4487 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 4488 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false) 4489 4490 void java_lang_invoke_CallSite::compute_offsets() { 4491 InstanceKlass* k = vmClasses::CallSite_klass(); 4492 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4493 } 4494 4495 #if INCLUDE_CDS 4496 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) { 4497 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4498 } 4499 #endif 4500 4501 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) { 4502 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 4503 4504 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset); 4505 return dep_oop; 4506 } 4507 4508 // Support for java_lang_invoke_ConstantCallSite 4509 4510 int java_lang_invoke_ConstantCallSite::_is_frozen_offset; 4511 4512 #define CONSTANTCALLSITE_FIELDS_DO(macro) \ 4513 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false) 4514 4515 void java_lang_invoke_ConstantCallSite::compute_offsets() { 4516 InstanceKlass* k = vmClasses::ConstantCallSite_klass(); 4517 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4518 } 4519 4520 #if INCLUDE_CDS 4521 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) { 4522 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4523 } 4524 #endif 4525 4526 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 4527 4528 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 4529 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset; 4530 4531 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 4532 InstanceKlass* k = vmClasses::Context_klass(); 4533 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4534 } 4535 4536 #if INCLUDE_CDS 4537 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) { 4538 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4539 } 4540 #endif 4541 4542 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 4543 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 4544 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset); 4545 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset); 4546 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr); 4547 return dep_ctx; 4548 } 4549 4550 // Support for java_security_AccessControlContext 4551 4552 int java_security_AccessControlContext::_context_offset; 4553 int java_security_AccessControlContext::_privilegedContext_offset; 4554 int java_security_AccessControlContext::_isPrivileged_offset; 4555 int java_security_AccessControlContext::_isAuthorized_offset; 4556 4557 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \ 4558 macro(_context_offset, k, "context", protectiondomain_signature, false); \ 4559 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \ 4560 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \ 4561 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false) 4562 4563 void java_security_AccessControlContext::compute_offsets() { 4564 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 4565 InstanceKlass* k = vmClasses::AccessControlContext_klass(); 4566 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4567 } 4568 4569 #if INCLUDE_CDS 4570 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) { 4571 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4572 } 4573 #endif 4574 4575 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 4576 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 4577 assert(_isAuthorized_offset != 0, "offsets should have been initialized"); 4578 // Ensure klass is initialized 4579 vmClasses::AccessControlContext_klass()->initialize(CHECK_NULL); 4580 // Allocate result 4581 oop result = vmClasses::AccessControlContext_klass()->allocate_instance(CHECK_NULL); 4582 // Fill in values 4583 result->obj_field_put(_context_offset, context()); 4584 result->obj_field_put(_privilegedContext_offset, privileged_context()); 4585 result->bool_field_put(_isPrivileged_offset, isPrivileged); 4586 result->bool_field_put(_isAuthorized_offset, true); 4587 return result; 4588 } 4589 4590 4591 // Support for java_lang_ClassLoader 4592 4593 int java_lang_ClassLoader::_loader_data_offset; 4594 int java_lang_ClassLoader::_parallelCapable_offset; 4595 int java_lang_ClassLoader::_name_offset; 4596 int java_lang_ClassLoader::_nameAndId_offset; 4597 int java_lang_ClassLoader::_unnamedModule_offset; 4598 int java_lang_ClassLoader::_parent_offset; 4599 4600 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) { 4601 assert(loader != nullptr, "loader must not be null"); 4602 assert(oopDesc::is_oop(loader), "loader must be oop"); 4603 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset)); 4604 } 4605 4606 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 4607 assert(loader != nullptr, "loader must not be null"); 4608 assert(oopDesc::is_oop(loader), "loader must be oop"); 4609 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset); 4610 } 4611 4612 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) { 4613 assert(loader != nullptr, "loader must not be null"); 4614 assert(oopDesc::is_oop(loader), "loader must be oop"); 4615 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data); 4616 } 4617 4618 #define CLASSLOADER_FIELDS_DO(macro) \ 4619 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 4620 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 4621 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \ 4622 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 4623 macro(_parent_offset, k1, "parent", classloader_signature, false) 4624 4625 void java_lang_ClassLoader::compute_offsets() { 4626 InstanceKlass* k1 = vmClasses::ClassLoader_klass(); 4627 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4628 4629 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4630 } 4631 4632 #if INCLUDE_CDS 4633 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) { 4634 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4635 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4636 } 4637 #endif 4638 4639 oop java_lang_ClassLoader::parent(oop loader) { 4640 assert(is_instance(loader), "loader must be oop"); 4641 return loader->obj_field(_parent_offset); 4642 } 4643 4644 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) { 4645 assert(is_instance(loader), "loader must be oop"); 4646 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset); 4647 } 4648 4649 // Returns the name field of this class loader. If the name field has not 4650 // been set, null will be returned. 4651 oop java_lang_ClassLoader::name(oop loader) { 4652 assert(is_instance(loader), "loader must be oop"); 4653 return loader->obj_field(_name_offset); 4654 } 4655 4656 // Returns the nameAndId field of this class loader. The format is 4657 // as follows: 4658 // If the defining loader has a name explicitly set then '<loader-name>' @<id> 4659 // If the defining loader has no name then <qualified-class-name> @<id> 4660 // If built-in loader, then omit '@<id>' as there is only one instance. 4661 // Use ClassLoader::loader_name_id() to obtain this String as a char*. 4662 oop java_lang_ClassLoader::nameAndId(oop loader) { 4663 assert(is_instance(loader), "loader must be oop"); 4664 return loader->obj_field(_nameAndId_offset); 4665 } 4666 4667 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 4668 assert(is_instance(loader), "loader must be oop"); 4669 assert(cl == nullptr || is_instance(cl), "cl argument must be oop"); 4670 oop acl = loader; 4671 debug_only(jint loop_count = 0); 4672 // This loop taken verbatim from ClassLoader.java: 4673 do { 4674 acl = parent(acl); 4675 if (cl == acl) { 4676 return true; 4677 } 4678 assert(++loop_count > 0, "loop_count overflow"); 4679 } while (acl != nullptr); 4680 return false; 4681 } 4682 4683 bool java_lang_ClassLoader::is_instance(oop obj) { 4684 return obj != nullptr && is_subclass(obj->klass()); 4685 } 4686 4687 4688 // For class loader classes, parallelCapable defined 4689 // based on non-null field 4690 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 4691 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 4692 assert(_parallelCapable_offset != 0, "offsets should have been initialized"); 4693 return (class_loader->obj_field(_parallelCapable_offset) != nullptr); 4694 } 4695 4696 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 4697 // Fix for 4474172; see evaluation for more details 4698 loader = non_reflection_class_loader(loader); 4699 4700 oop cl = SystemDictionary::java_system_loader(); 4701 while(cl != nullptr) { 4702 if (cl == loader) return true; 4703 cl = parent(cl); 4704 } 4705 return false; 4706 } 4707 4708 // Return true if this is one of the class loaders associated with 4709 // the generated bytecodes for serialization constructor returned 4710 // by sun.reflect.ReflectionFactory::newConstructorForSerialization 4711 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 4712 if (loader != nullptr) { 4713 Klass* delegating_cl_class = vmClasses::reflect_DelegatingClassLoader_klass(); 4714 // This might be null in non-1.4 JDKs 4715 return (delegating_cl_class != nullptr && loader->is_a(delegating_cl_class)); 4716 } 4717 return false; 4718 } 4719 4720 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 4721 // See whether this is one of the class loaders associated with 4722 // the generated bytecodes for reflection, and if so, "magically" 4723 // delegate to its parent to prevent class loading from occurring 4724 // in places where applications using reflection didn't expect it. 4725 if (is_reflection_class_loader(loader)) { 4726 return parent(loader); 4727 } 4728 return loader; 4729 } 4730 4731 oop java_lang_ClassLoader::unnamedModule(oop loader) { 4732 assert(is_instance(loader), "loader must be oop"); 4733 return loader->obj_field(_unnamedModule_offset); 4734 } 4735 4736 // Support for java_lang_System 4737 // 4738 4739 int java_lang_System::_static_in_offset; 4740 int java_lang_System::_static_out_offset; 4741 int java_lang_System::_static_err_offset; 4742 int java_lang_System::_static_security_offset; 4743 int java_lang_System::_static_allow_security_offset; 4744 int java_lang_System::_static_never_offset; 4745 4746 #define SYSTEM_FIELDS_DO(macro) \ 4747 macro(_static_in_offset, k, "in", input_stream_signature, true); \ 4748 macro(_static_out_offset, k, "out", print_stream_signature, true); \ 4749 macro(_static_err_offset, k, "err", print_stream_signature, true); \ 4750 macro(_static_security_offset, k, "security", security_manager_signature, true); \ 4751 macro(_static_allow_security_offset, k, "allowSecurityManager", int_signature, true); \ 4752 macro(_static_never_offset, k, "NEVER", int_signature, true) 4753 4754 void java_lang_System::compute_offsets() { 4755 InstanceKlass* k = vmClasses::System_klass(); 4756 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4757 } 4758 4759 // This field tells us that a security manager can never be installed so we 4760 // can completely skip populating the ProtectionDomainCacheTable. 4761 bool java_lang_System::allow_security_manager() { 4762 static int initialized = false; 4763 static bool allowed = true; // default 4764 if (!initialized) { 4765 oop base = vmClasses::System_klass()->static_field_base_raw(); 4766 int never = base->int_field(_static_never_offset); 4767 allowed = (base->int_field(_static_allow_security_offset) != never); 4768 initialized = true; 4769 } 4770 return allowed; 4771 } 4772 4773 // This field tells us that a security manager is installed. 4774 bool java_lang_System::has_security_manager() { 4775 oop base = vmClasses::System_klass()->static_field_base_raw(); 4776 return base->obj_field(_static_security_offset) != nullptr; 4777 } 4778 4779 #if INCLUDE_CDS 4780 void java_lang_System::serialize_offsets(SerializeClosure* f) { 4781 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4782 } 4783 #endif 4784 4785 // Support for jdk_internal_misc_UnsafeConstants 4786 // 4787 class UnsafeConstantsFixup : public FieldClosure { 4788 private: 4789 int _address_size; 4790 int _page_size; 4791 bool _big_endian; 4792 bool _use_unaligned_access; 4793 int _data_cache_line_flush_size; 4794 public: 4795 UnsafeConstantsFixup() { 4796 // round up values for all static final fields 4797 _address_size = sizeof(void*); 4798 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size()); 4799 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true); 4800 _use_unaligned_access = UseUnalignedAccesses; 4801 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size(); 4802 } 4803 4804 void do_field(fieldDescriptor* fd) { 4805 oop mirror = fd->field_holder()->java_mirror(); 4806 assert(mirror != nullptr, "UnsafeConstants must have mirror already"); 4807 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants"); 4808 assert(fd->is_final(), "fields of UnsafeConstants must be final"); 4809 assert(fd->is_static(), "fields of UnsafeConstants must be static"); 4810 if (fd->name() == vmSymbols::address_size_name()) { 4811 mirror->int_field_put(fd->offset(), _address_size); 4812 } else if (fd->name() == vmSymbols::page_size_name()) { 4813 mirror->int_field_put(fd->offset(), _page_size); 4814 } else if (fd->name() == vmSymbols::big_endian_name()) { 4815 mirror->bool_field_put(fd->offset(), _big_endian); 4816 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) { 4817 mirror->bool_field_put(fd->offset(), _use_unaligned_access); 4818 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) { 4819 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size); 4820 } else { 4821 assert(false, "unexpected UnsafeConstants field"); 4822 } 4823 } 4824 }; 4825 4826 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() { 4827 UnsafeConstantsFixup fixup; 4828 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup); 4829 } 4830 4831 4832 // java_lang_StackTraceElement 4833 4834 int java_lang_StackTraceElement::_methodName_offset; 4835 int java_lang_StackTraceElement::_fileName_offset; 4836 int java_lang_StackTraceElement::_lineNumber_offset; 4837 int java_lang_StackTraceElement::_moduleName_offset; 4838 int java_lang_StackTraceElement::_moduleVersion_offset; 4839 int java_lang_StackTraceElement::_classLoaderName_offset; 4840 int java_lang_StackTraceElement::_declaringClass_offset; 4841 int java_lang_StackTraceElement::_declaringClassObject_offset; 4842 4843 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4844 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4845 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4846 macro(_moduleName_offset, k, "moduleName", string_signature, false); \ 4847 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4848 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \ 4849 macro(_methodName_offset, k, "methodName", string_signature, false); \ 4850 macro(_fileName_offset, k, "fileName", string_signature, false); \ 4851 macro(_lineNumber_offset, k, "lineNumber", int_signature, false) 4852 4853 // Support for java_lang_StackTraceElement 4854 void java_lang_StackTraceElement::compute_offsets() { 4855 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 4856 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4857 } 4858 4859 #if INCLUDE_CDS 4860 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) { 4861 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4862 } 4863 #endif 4864 4865 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 4866 element->obj_field_put(_fileName_offset, value); 4867 } 4868 4869 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 4870 element->obj_field_put(_declaringClass_offset, value); 4871 } 4872 4873 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 4874 element->obj_field_put(_methodName_offset, value); 4875 } 4876 4877 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 4878 element->int_field_put(_lineNumber_offset, value); 4879 } 4880 4881 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 4882 element->obj_field_put(_moduleName_offset, value); 4883 } 4884 4885 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 4886 element->obj_field_put(_moduleVersion_offset, value); 4887 } 4888 4889 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 4890 element->obj_field_put(_classLoaderName_offset, value); 4891 } 4892 4893 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 4894 element->obj_field_put(_declaringClassObject_offset, value); 4895 } 4896 4897 4898 // java_lang_AssertionStatusDirectives 4899 4900 int java_lang_AssertionStatusDirectives::_classes_offset; 4901 int java_lang_AssertionStatusDirectives::_classEnabled_offset; 4902 int java_lang_AssertionStatusDirectives::_packages_offset; 4903 int java_lang_AssertionStatusDirectives::_packageEnabled_offset; 4904 int java_lang_AssertionStatusDirectives::_deflt_offset; 4905 4906 // Support for java Assertions - java_lang_AssertionStatusDirectives. 4907 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 4908 macro(_classes_offset, k, "classes", string_array_signature, false); \ 4909 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 4910 macro(_packages_offset, k, "packages", string_array_signature, false); \ 4911 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 4912 macro(_deflt_offset, k, "deflt", bool_signature, false) 4913 4914 void java_lang_AssertionStatusDirectives::compute_offsets() { 4915 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass(); 4916 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4917 } 4918 4919 #if INCLUDE_CDS 4920 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) { 4921 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4922 } 4923 #endif 4924 4925 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 4926 o->obj_field_put(_classes_offset, val); 4927 } 4928 4929 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 4930 o->obj_field_put(_classEnabled_offset, val); 4931 } 4932 4933 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 4934 o->obj_field_put(_packages_offset, val); 4935 } 4936 4937 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 4938 o->obj_field_put(_packageEnabled_offset, val); 4939 } 4940 4941 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 4942 o->bool_field_put(_deflt_offset, val); 4943 } 4944 4945 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset; 4946 4947 #define AOS_FIELDS_DO(macro) \ 4948 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false) 4949 4950 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() { 4951 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass(); 4952 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4953 } 4954 4955 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 4956 assert(_owner_offset != 0, "Must be initialized"); 4957 return obj->obj_field(_owner_offset); 4958 } 4959 4960 #if INCLUDE_CDS 4961 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) { 4962 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4963 } 4964 #endif 4965 4966 int vector_VectorPayload::_payload_offset; 4967 4968 #define VECTORPAYLOAD_FIELDS_DO(macro) \ 4969 macro(_payload_offset, k, "payload", object_signature, false) 4970 4971 void vector_VectorPayload::compute_offsets() { 4972 InstanceKlass* k = vmClasses::vector_VectorPayload_klass(); 4973 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4974 } 4975 4976 #if INCLUDE_CDS 4977 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) { 4978 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4979 } 4980 #endif 4981 4982 void vector_VectorPayload::set_payload(oop o, oop val) { 4983 o->obj_field_put(_payload_offset, val); 4984 } 4985 4986 bool vector_VectorPayload::is_instance(oop obj) { 4987 return obj != nullptr && is_subclass(obj->klass()); 4988 } 4989 4990 int java_lang_Integer_IntegerCache::_static_cache_offset; 4991 int java_lang_Long_LongCache::_static_cache_offset; 4992 int java_lang_Character_CharacterCache::_static_cache_offset; 4993 int java_lang_Short_ShortCache::_static_cache_offset; 4994 int java_lang_Byte_ByteCache::_static_cache_offset; 4995 4996 #define INTEGER_CACHE_FIELDS_DO(macro) \ 4997 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true) 4998 4999 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) { 5000 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5001 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5002 } 5003 5004 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) { 5005 oop base = ik->static_field_base_raw(); 5006 return objArrayOop(base->obj_field(_static_cache_offset)); 5007 } 5008 5009 Symbol* java_lang_Integer_IntegerCache::symbol() { 5010 return vmSymbols::java_lang_Integer_IntegerCache(); 5011 } 5012 5013 #if INCLUDE_CDS 5014 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) { 5015 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5016 } 5017 #endif 5018 #undef INTEGER_CACHE_FIELDS_DO 5019 5020 jint java_lang_Integer::value(oop obj) { 5021 jvalue v; 5022 java_lang_boxing_object::get_value(obj, &v); 5023 return v.i; 5024 } 5025 5026 #define LONG_CACHE_FIELDS_DO(macro) \ 5027 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true) 5028 5029 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) { 5030 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5031 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5032 } 5033 5034 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) { 5035 oop base = ik->static_field_base_raw(); 5036 return objArrayOop(base->obj_field(_static_cache_offset)); 5037 } 5038 5039 Symbol* java_lang_Long_LongCache::symbol() { 5040 return vmSymbols::java_lang_Long_LongCache(); 5041 } 5042 5043 #if INCLUDE_CDS 5044 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) { 5045 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5046 } 5047 #endif 5048 #undef LONG_CACHE_FIELDS_DO 5049 5050 jlong java_lang_Long::value(oop obj) { 5051 jvalue v; 5052 java_lang_boxing_object::get_value(obj, &v); 5053 return v.j; 5054 } 5055 5056 #define CHARACTER_CACHE_FIELDS_DO(macro) \ 5057 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true) 5058 5059 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) { 5060 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5061 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5062 } 5063 5064 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) { 5065 oop base = ik->static_field_base_raw(); 5066 return objArrayOop(base->obj_field(_static_cache_offset)); 5067 } 5068 5069 Symbol* java_lang_Character_CharacterCache::symbol() { 5070 return vmSymbols::java_lang_Character_CharacterCache(); 5071 } 5072 5073 #if INCLUDE_CDS 5074 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) { 5075 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5076 } 5077 #endif 5078 #undef CHARACTER_CACHE_FIELDS_DO 5079 5080 jchar java_lang_Character::value(oop obj) { 5081 jvalue v; 5082 java_lang_boxing_object::get_value(obj, &v); 5083 return v.c; 5084 } 5085 5086 #define SHORT_CACHE_FIELDS_DO(macro) \ 5087 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true) 5088 5089 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) { 5090 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5091 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5092 } 5093 5094 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) { 5095 oop base = ik->static_field_base_raw(); 5096 return objArrayOop(base->obj_field(_static_cache_offset)); 5097 } 5098 5099 Symbol* java_lang_Short_ShortCache::symbol() { 5100 return vmSymbols::java_lang_Short_ShortCache(); 5101 } 5102 5103 #if INCLUDE_CDS 5104 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) { 5105 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5106 } 5107 #endif 5108 #undef SHORT_CACHE_FIELDS_DO 5109 5110 jshort java_lang_Short::value(oop obj) { 5111 jvalue v; 5112 java_lang_boxing_object::get_value(obj, &v); 5113 return v.s; 5114 } 5115 5116 #define BYTE_CACHE_FIELDS_DO(macro) \ 5117 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true) 5118 5119 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) { 5120 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5121 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5122 } 5123 5124 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) { 5125 oop base = ik->static_field_base_raw(); 5126 return objArrayOop(base->obj_field(_static_cache_offset)); 5127 } 5128 5129 Symbol* java_lang_Byte_ByteCache::symbol() { 5130 return vmSymbols::java_lang_Byte_ByteCache(); 5131 } 5132 5133 #if INCLUDE_CDS 5134 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) { 5135 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5136 } 5137 #endif 5138 #undef BYTE_CACHE_FIELDS_DO 5139 5140 jbyte java_lang_Byte::value(oop obj) { 5141 jvalue v; 5142 java_lang_boxing_object::get_value(obj, &v); 5143 return v.b; 5144 } 5145 5146 int java_lang_Boolean::_static_TRUE_offset; 5147 int java_lang_Boolean::_static_FALSE_offset; 5148 5149 #define BOOLEAN_FIELDS_DO(macro) \ 5150 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \ 5151 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true) 5152 5153 5154 void java_lang_Boolean::compute_offsets(InstanceKlass *k) { 5155 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5156 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5157 } 5158 5159 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) { 5160 oop base = ik->static_field_base_raw(); 5161 return base->obj_field(_static_TRUE_offset); 5162 } 5163 5164 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) { 5165 oop base = ik->static_field_base_raw(); 5166 return base->obj_field(_static_FALSE_offset); 5167 } 5168 5169 Symbol* java_lang_Boolean::symbol() { 5170 return vmSymbols::java_lang_Boolean(); 5171 } 5172 5173 #if INCLUDE_CDS 5174 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) { 5175 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5176 } 5177 #endif 5178 #undef BOOLEAN_CACHE_FIELDS_DO 5179 5180 jboolean java_lang_Boolean::value(oop obj) { 5181 jvalue v; 5182 java_lang_boxing_object::get_value(obj, &v); 5183 return v.z; 5184 } 5185 5186 // java_lang_reflect_RecordComponent 5187 5188 int java_lang_reflect_RecordComponent::_clazz_offset; 5189 int java_lang_reflect_RecordComponent::_name_offset; 5190 int java_lang_reflect_RecordComponent::_type_offset; 5191 int java_lang_reflect_RecordComponent::_accessor_offset; 5192 int java_lang_reflect_RecordComponent::_signature_offset; 5193 int java_lang_reflect_RecordComponent::_annotations_offset; 5194 int java_lang_reflect_RecordComponent::_typeAnnotations_offset; 5195 5196 #define RECORDCOMPONENT_FIELDS_DO(macro) \ 5197 macro(_clazz_offset, k, "clazz", class_signature, false); \ 5198 macro(_name_offset, k, "name", string_signature, false); \ 5199 macro(_type_offset, k, "type", class_signature, false); \ 5200 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \ 5201 macro(_signature_offset, k, "signature", string_signature, false); \ 5202 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \ 5203 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false); 5204 5205 // Support for java_lang_reflect_RecordComponent 5206 void java_lang_reflect_RecordComponent::compute_offsets() { 5207 InstanceKlass* k = vmClasses::RecordComponent_klass(); 5208 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5209 } 5210 5211 #if INCLUDE_CDS 5212 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) { 5213 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5214 } 5215 #endif 5216 5217 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) { 5218 element->obj_field_put(_clazz_offset, value); 5219 } 5220 5221 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) { 5222 element->obj_field_put(_name_offset, value); 5223 } 5224 5225 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) { 5226 element->obj_field_put(_type_offset, value); 5227 } 5228 5229 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) { 5230 element->obj_field_put(_accessor_offset, value); 5231 } 5232 5233 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) { 5234 element->obj_field_put(_signature_offset, value); 5235 } 5236 5237 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) { 5238 element->obj_field_put(_annotations_offset, value); 5239 } 5240 5241 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) { 5242 element->obj_field_put(_typeAnnotations_offset, value); 5243 } 5244 5245 // java_lang_InternalError 5246 int java_lang_InternalError::_during_unsafe_access_offset; 5247 5248 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) { 5249 internal_error->bool_field_put(_during_unsafe_access_offset, true); 5250 } 5251 5252 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) { 5253 return internal_error->bool_field(_during_unsafe_access_offset); 5254 } 5255 5256 void java_lang_InternalError::compute_offsets() { 5257 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 5258 } 5259 5260 #if INCLUDE_CDS 5261 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) { 5262 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 5263 } 5264 #endif 5265 5266 #define BASIC_JAVA_CLASSES_DO_PART1(f) \ 5267 f(java_lang_Class) \ 5268 f(java_lang_String) \ 5269 f(java_lang_ref_Reference) \ 5270 //end 5271 5272 #define BASIC_JAVA_CLASSES_DO_PART2(f) \ 5273 f(java_lang_System) \ 5274 f(java_lang_ClassLoader) \ 5275 f(java_lang_Throwable) \ 5276 f(java_lang_Thread) \ 5277 f(java_lang_Thread_FieldHolder) \ 5278 f(java_lang_Thread_Constants) \ 5279 f(java_lang_ThreadGroup) \ 5280 f(java_lang_VirtualThread) \ 5281 f(java_lang_InternalError) \ 5282 f(java_lang_AssertionStatusDirectives) \ 5283 f(java_lang_ref_SoftReference) \ 5284 f(java_lang_invoke_MethodHandle) \ 5285 f(java_lang_invoke_DirectMethodHandle) \ 5286 f(java_lang_invoke_MemberName) \ 5287 f(java_lang_invoke_ResolvedMethodName) \ 5288 f(java_lang_invoke_LambdaForm) \ 5289 f(java_lang_invoke_MethodType) \ 5290 f(java_lang_invoke_CallSite) \ 5291 f(java_lang_invoke_ConstantCallSite) \ 5292 f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \ 5293 f(java_security_AccessControlContext) \ 5294 f(java_lang_reflect_AccessibleObject) \ 5295 f(java_lang_reflect_Method) \ 5296 f(java_lang_reflect_Constructor) \ 5297 f(java_lang_reflect_Field) \ 5298 f(java_lang_reflect_RecordComponent) \ 5299 f(reflect_ConstantPool) \ 5300 f(java_lang_reflect_Parameter) \ 5301 f(java_lang_Module) \ 5302 f(java_lang_StackTraceElement) \ 5303 f(java_lang_ClassFrameInfo) \ 5304 f(java_lang_StackFrameInfo) \ 5305 f(java_lang_LiveStackFrameInfo) \ 5306 f(jdk_internal_vm_ContinuationScope) \ 5307 f(jdk_internal_vm_Continuation) \ 5308 f(jdk_internal_vm_StackChunk) \ 5309 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \ 5310 f(jdk_internal_foreign_abi_NativeEntryPoint) \ 5311 f(jdk_internal_foreign_abi_ABIDescriptor) \ 5312 f(jdk_internal_foreign_abi_VMStorage) \ 5313 f(jdk_internal_foreign_abi_CallConv) \ 5314 f(jdk_internal_misc_UnsafeConstants) \ 5315 f(java_lang_boxing_object) \ 5316 f(vector_VectorPayload) \ 5317 //end 5318 5319 #define BASIC_JAVA_CLASSES_DO(f) \ 5320 BASIC_JAVA_CLASSES_DO_PART1(f) \ 5321 BASIC_JAVA_CLASSES_DO_PART2(f) 5322 5323 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets(); 5324 5325 // Compute field offsets of all the classes in this file 5326 void JavaClasses::compute_offsets() { 5327 if (UseSharedSpaces) { 5328 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() && 5329 JvmtiExport::has_early_class_hook_env()), 5330 "JavaClasses::compute_offsets() must be called in early JVMTI phase.")); 5331 // None of the classes used by the rest of this function can be replaced by 5332 // JVMTI ClassFileLoadHook. 5333 // We are safe to use the archived offsets, which have already been restored 5334 // by JavaClasses::serialize_offsets, without computing the offsets again. 5335 return; 5336 } 5337 5338 // We have already called the compute_offsets() of the 5339 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and 5340 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all() 5341 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS); 5342 } 5343 5344 #if INCLUDE_CDS 5345 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc); 5346 5347 void JavaClasses::serialize_offsets(SerializeClosure* soc) { 5348 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS); 5349 } 5350 #endif 5351 5352 #if INCLUDE_CDS_JAVA_HEAP 5353 bool JavaClasses::is_supported_for_archiving(oop obj) { 5354 Klass* klass = obj->klass(); 5355 5356 if (klass == vmClasses::ClassLoader_klass() || // ClassLoader::loader_data is malloc'ed. 5357 // The next 3 classes are used to implement java.lang.invoke, and are not used directly in 5358 // regular Java code. The implementation of java.lang.invoke uses generated hidden classes 5359 // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS. 5360 // So for now we cannot not support these classes for archiving. 5361 // 5362 // These objects typically are not referenced by static fields, but rather by resolved 5363 // constant pool entries, so excluding them shouldn't affect the archiving of static fields. 5364 klass == vmClasses::ResolvedMethodName_klass() || 5365 klass == vmClasses::MemberName_klass() || 5366 klass == vmClasses::Context_klass() || 5367 // It's problematic to archive Reference objects. One of the reasons is that 5368 // Reference::discovered may pull in unwanted objects (see JDK-8284336) 5369 klass->is_subclass_of(vmClasses::Reference_klass())) { 5370 return false; 5371 } 5372 5373 return true; 5374 } 5375 #endif 5376 5377 #ifndef PRODUCT 5378 5379 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check. 5380 5381 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name, 5382 const char* field_sig) { 5383 EXCEPTION_MARK; 5384 fieldDescriptor fd; 5385 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name); 5386 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 5387 InstanceKlass* ik = InstanceKlass::cast(k); 5388 TempNewSymbol f_name = SymbolTable::new_symbol(field_name); 5389 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig); 5390 if (!ik->find_local_field(f_name, f_sig, &fd)) { 5391 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 5392 return false; 5393 } 5394 if (fd.is_static()) { 5395 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 5396 return false; 5397 } 5398 if (fd.offset() == deserialized_offset ) { 5399 return true; 5400 } else { 5401 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.", 5402 klass_name, field_name, deserialized_offset, fd.offset()); 5403 return false; 5404 } 5405 } 5406 5407 void JavaClasses::check_offsets() { 5408 bool valid = true; 5409 5410 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 5411 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig) 5412 5413 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 5414 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig) 5415 5416 // Boxed primitive objects (java_lang_boxing_object) 5417 5418 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 5419 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 5420 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 5421 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 5422 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 5423 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 5424 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 5425 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 5426 5427 if (!valid) vm_exit_during_initialization("Field offset verification failed"); 5428 } 5429 5430 #endif // PRODUCT 5431 5432 int InjectedField::compute_offset() { 5433 InstanceKlass* ik = InstanceKlass::cast(klass()); 5434 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 5435 if (!may_be_java && !fs.field_flags().is_injected()) { 5436 // Only look at injected fields 5437 continue; 5438 } 5439 if (fs.name() == name() && fs.signature() == signature()) { 5440 return fs.offset(); 5441 } 5442 } 5443 ResourceMark rm; 5444 tty->print_cr("Invalid layout of %s at %s/%s%s", ik->external_name(), name()->as_C_string(), signature()->as_C_string(), may_be_java ? " (may_be_java)" : ""); 5445 #ifndef PRODUCT 5446 ik->print(); 5447 tty->print_cr("all fields:"); 5448 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 5449 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 5450 } 5451 #endif //PRODUCT 5452 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 5453 return -1; 5454 } 5455 5456 void javaClasses_init() { 5457 JavaClasses::compute_offsets(); 5458 JavaClasses::check_offsets(); 5459 FilteredFieldsMap::initialize(); // must be done after computing offsets. 5460 } --- EOF ---