1 /* 2 * Copyright (c) 1997, 2020, 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 "classfile/altHashing.hpp" 27 #include "classfile/classLoaderData.inline.hpp" 28 #include "classfile/javaClasses.inline.hpp" 29 #include "classfile/moduleEntry.hpp" 30 #include "classfile/stringTable.hpp" 31 #include "classfile/symbolTable.hpp" 32 #include "classfile/vmSymbols.hpp" 33 #include "code/debugInfo.hpp" 34 #include "code/dependencyContext.hpp" 35 #include "code/pcDesc.hpp" 36 #include "interpreter/interpreter.hpp" 37 #include "interpreter/linkResolver.hpp" 38 #include "logging/log.hpp" 39 #include "logging/logStream.hpp" 40 #include "memory/heapShared.inline.hpp" 41 #include "memory/metaspaceShared.hpp" 42 #include "memory/oopFactory.hpp" 43 #include "memory/resourceArea.hpp" 44 #include "memory/universe.hpp" 45 #include "oops/fieldStreams.inline.hpp" 46 #include "oops/instanceKlass.hpp" 47 #include "oops/instanceMirrorKlass.hpp" 48 #include "oops/klass.hpp" 49 #include "oops/method.inline.hpp" 50 #include "oops/objArrayOop.inline.hpp" 51 #include "oops/oop.inline.hpp" 52 #include "oops/symbol.hpp" 53 #include "oops/recordComponent.hpp" 54 #include "oops/typeArrayOop.inline.hpp" 55 #include "prims/jvmtiExport.hpp" 56 #include "prims/resolvedMethodTable.hpp" 57 #include "runtime/fieldDescriptor.inline.hpp" 58 #include "runtime/frame.inline.hpp" 59 #include "runtime/handles.inline.hpp" 60 #include "runtime/init.hpp" 61 #include "runtime/interfaceSupport.inline.hpp" 62 #include "runtime/java.hpp" 63 #include "runtime/javaCalls.hpp" 64 #include "runtime/jniHandles.inline.hpp" 65 #include "runtime/safepoint.hpp" 66 #include "runtime/safepointVerifiers.hpp" 67 #include "runtime/thread.inline.hpp" 68 #include "runtime/vframe.inline.hpp" 69 #include "runtime/vm_version.hpp" 70 #include "utilities/align.hpp" 71 #include "utilities/preserveException.hpp" 72 #include "utilities/utf8.hpp" 73 #if INCLUDE_JVMCI 74 #include "jvmci/jvmciJavaClasses.hpp" 75 #endif 76 77 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 78 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 79 80 #if INCLUDE_CDS 81 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \ 82 f->do_u4((u4*)&_##name##_offset); 83 #endif 84 85 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 86 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 87 88 InjectedField JavaClasses::_injected_fields[] = { 89 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 90 }; 91 92 // Register native methods of Object 93 void java_lang_Object::register_natives(TRAPS) { 94 InstanceKlass* obj = SystemDictionary::Object_klass(); 95 Method::register_native(obj, vmSymbols::hashCode_name(), 96 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK); 97 Method::register_native(obj, vmSymbols::wait_name(), 98 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK); 99 Method::register_native(obj, vmSymbols::notify_name(), 100 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK); 101 Method::register_native(obj, vmSymbols::notifyAll_name(), 102 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK); 103 Method::register_native(obj, vmSymbols::clone_name(), 104 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD); 105 } 106 107 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 108 return _injected_fields[id].compute_offset(); 109 } 110 111 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 112 *field_count = 0; 113 114 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 115 if (sid == vmSymbols::NO_SID) { 116 // Only well known classes can inject fields 117 return NULL; 118 } 119 120 int count = 0; 121 int start = -1; 122 123 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 124 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 125 count++; \ 126 if (start == -1) start = klass##_##name##_enum; \ 127 } 128 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 129 #undef LOOKUP_INJECTED_FIELD 130 131 if (start != -1) { 132 *field_count = count; 133 return _injected_fields + start; 134 } 135 return NULL; 136 } 137 138 139 // Helpful routine for computing field offsets at run time rather than hardcoding them 140 // Finds local fields only, including static fields. Static field offsets are from the 141 // beginning of the mirror. 142 static void compute_offset(int &dest_offset, 143 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol, 144 bool is_static = false) { 145 fieldDescriptor fd; 146 if (ik == NULL) { 147 ResourceMark rm; 148 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string()); 149 vm_exit_during_initialization("Invalid layout of well-known class"); 150 } 151 152 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) { 153 ResourceMark rm; 154 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(), 155 name_symbol->as_C_string(), signature_symbol->as_C_string()); 156 #ifndef PRODUCT 157 // Prints all fields and offsets 158 Log(class) lt; 159 LogStream ls(lt.error()); 160 ik->print_on(&ls); 161 #endif //PRODUCT 162 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 163 } 164 dest_offset = fd.offset(); 165 } 166 167 // Overloading to pass name as a string. 168 static void compute_offset(int& dest_offset, InstanceKlass* ik, 169 const char* name_string, Symbol* signature_symbol, 170 bool is_static = false) { 171 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string)); 172 if (name == NULL) { 173 ResourceMark rm; 174 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string); 175 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name()); 176 } 177 compute_offset(dest_offset, ik, name, signature_symbol, is_static); 178 } 179 180 181 #if INCLUDE_CDS 182 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \ 183 f->do_u4((u4*)&offset) 184 #endif 185 186 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \ 187 compute_offset(offset, klass, name, vmSymbols::signature(), is_static) 188 189 190 // java_lang_String 191 192 int java_lang_String::_value_offset; 193 int java_lang_String::_hash_offset; 194 int java_lang_String::_hashIsZero_offset; 195 int java_lang_String::_coder_offset; 196 197 bool java_lang_String::_initialized; 198 199 bool java_lang_String::is_instance(oop obj) { 200 return is_instance_inlined(obj); 201 } 202 203 #define STRING_FIELDS_DO(macro) \ 204 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \ 205 macro(_hash_offset, k, "hash", int_signature, false); \ 206 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \ 207 macro(_coder_offset, k, "coder", byte_signature, false); 208 209 void java_lang_String::compute_offsets() { 210 if (_initialized) { 211 return; 212 } 213 214 InstanceKlass* k = SystemDictionary::String_klass(); 215 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 216 217 _initialized = true; 218 } 219 220 #if INCLUDE_CDS 221 void java_lang_String::serialize_offsets(SerializeClosure* f) { 222 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 223 f->do_bool(&_initialized); 224 } 225 #endif 226 227 class CompactStringsFixup : public FieldClosure { 228 private: 229 bool _value; 230 231 public: 232 CompactStringsFixup(bool value) : _value(value) {} 233 234 void do_field(fieldDescriptor* fd) { 235 if (fd->name() == vmSymbols::compact_strings_name()) { 236 oop mirror = fd->field_holder()->java_mirror(); 237 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String"); 238 assert(mirror != NULL, "String must have mirror already"); 239 mirror->bool_field_put(fd->offset(), _value); 240 } 241 } 242 }; 243 244 void java_lang_String::set_compact_strings(bool value) { 245 CompactStringsFixup fix(value); 246 SystemDictionary::String_klass()->do_local_static_fields(&fix); 247 } 248 249 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 250 assert(_initialized, "Must be initialized"); 251 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 252 253 // Create the String object first, so there's a chance that the String 254 // and the char array it points to end up in the same cache line. 255 oop obj; 256 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH); 257 258 // Create the char array. The String object must be handlized here 259 // because GC can happen as a result of the allocation attempt. 260 Handle h_obj(THREAD, obj); 261 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 262 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 263 264 // Point the String at the char array 265 obj = h_obj(); 266 set_value(obj, buffer); 267 // No need to zero the offset, allocation zero'ed the entire String object 268 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 269 return h_obj; 270 } 271 272 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) { 273 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 274 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 275 typeArrayOop buffer = value(h_obj()); 276 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 277 if (is_latin1) { 278 for (int index = 0; index < length; index++) { 279 buffer->byte_at_put(index, (jbyte)unicode[index]); 280 } 281 } else { 282 for (int index = 0; index < length; index++) { 283 buffer->char_at_put(index, unicode[index]); 284 } 285 } 286 287 #ifdef ASSERT 288 { 289 ResourceMark rm; 290 char* expected = UNICODE::as_utf8(unicode, length); 291 char* actual = as_utf8_string(h_obj()); 292 if (strcmp(expected, actual) != 0) { 293 fatal("Unicode conversion failure: %s --> %s", expected, actual); 294 } 295 } 296 #endif 297 298 return h_obj; 299 } 300 301 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) { 302 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL); 303 return h_obj(); 304 } 305 306 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 307 if (utf8_str == NULL) { 308 return Handle(); 309 } 310 bool has_multibyte, is_latin1; 311 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 312 if (!CompactStrings) { 313 has_multibyte = true; 314 is_latin1 = false; 315 } 316 317 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 318 if (length > 0) { 319 if (!has_multibyte) { 320 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 321 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 322 } else if (is_latin1) { 323 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 324 } else { 325 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 326 } 327 } 328 329 #ifdef ASSERT 330 // This check is too strict when the input string is not a valid UTF8. 331 // For example, it may be created with arbitrary content via jni_NewStringUTF. 332 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, (int)strlen(utf8_str), false)) { 333 ResourceMark rm; 334 const char* expected = utf8_str; 335 char* actual = as_utf8_string(h_obj()); 336 if (strcmp(expected, actual) != 0) { 337 fatal("String conversion failure: %s --> %s", expected, actual); 338 } 339 } 340 #endif 341 342 return h_obj; 343 } 344 345 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 346 Handle h_obj = create_from_str(utf8_str, CHECK_NULL); 347 return h_obj(); 348 } 349 350 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 351 const char* utf8_str = (char*)symbol->bytes(); 352 int utf8_len = symbol->utf8_length(); 353 354 bool has_multibyte, is_latin1; 355 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 356 if (!CompactStrings) { 357 has_multibyte = true; 358 is_latin1 = false; 359 } 360 361 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 362 if (length > 0) { 363 if (!has_multibyte) { 364 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 365 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 366 } else if (is_latin1) { 367 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 368 } else { 369 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 370 } 371 } 372 373 #ifdef ASSERT 374 { 375 ResourceMark rm; 376 const char* expected = symbol->as_utf8(); 377 char* actual = as_utf8_string(h_obj()); 378 if (strncmp(expected, actual, utf8_len) != 0) { 379 fatal("Symbol conversion failure: %s --> %s", expected, actual); 380 } 381 } 382 #endif 383 384 return h_obj; 385 } 386 387 // Converts a C string to a Java String based on current encoding 388 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 389 assert(str != NULL, "bad arguments"); 390 391 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *); 392 static to_java_string_fn_t _to_java_string_fn = NULL; 393 394 if (_to_java_string_fn == NULL) { 395 void *lib_handle = os::native_java_library(); 396 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform")); 397 #if defined(_WIN32) && !defined(_WIN64) 398 if (_to_java_string_fn == NULL) { 399 // On 32 bit Windows, also try __stdcall decorated name 400 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8")); 401 } 402 #endif 403 if (_to_java_string_fn == NULL) { 404 fatal("JNU_NewStringPlatform missing"); 405 } 406 } 407 408 jstring js = NULL; 409 { 410 assert(THREAD->is_Java_thread(), "must be java thread"); 411 JavaThread* thread = (JavaThread*)THREAD; 412 HandleMark hm(thread); 413 ThreadToNativeFromVM ttn(thread); 414 js = (_to_java_string_fn)(thread->jni_environment(), str); 415 } 416 417 Handle native_platform_string(THREAD, JNIHandles::resolve(js)); 418 JNIHandles::destroy_local(js); // destroy local JNIHandle. 419 return native_platform_string; 420 } 421 422 // Converts a Java String to a native C string that can be used for 423 // native OS calls. 424 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 425 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 426 static to_platform_string_fn_t _to_platform_string_fn = NULL; 427 428 if (_to_platform_string_fn == NULL) { 429 void *lib_handle = os::native_java_library(); 430 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 431 if (_to_platform_string_fn == NULL) { 432 fatal("GetStringPlatformChars missing"); 433 } 434 } 435 436 char *native_platform_string; 437 { JavaThread* thread = (JavaThread*)THREAD; 438 assert(thread->is_Java_thread(), "must be java thread"); 439 JNIEnv *env = thread->jni_environment(); 440 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 441 bool is_copy; 442 HandleMark hm(thread); 443 ThreadToNativeFromVM ttn(thread); 444 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 445 assert(is_copy == JNI_TRUE, "is_copy value changed"); 446 JNIHandles::destroy_local(js); 447 } 448 return native_platform_string; 449 } 450 451 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 452 oop obj = java_string(); 453 // Typical usage is to convert all '/' to '.' in string. 454 typeArrayOop value = java_lang_String::value(obj); 455 int length = java_lang_String::length(obj, value); 456 bool is_latin1 = java_lang_String::is_latin1(obj); 457 458 // First check if any from_char exist 459 int index; // Declared outside, used later 460 for (index = 0; index < length; index++) { 461 jchar c = !is_latin1 ? value->char_at(index) : 462 ((jchar) value->byte_at(index)) & 0xff; 463 if (c == from_char) { 464 break; 465 } 466 } 467 if (index == length) { 468 // No from_char, so do not copy. 469 return java_string; 470 } 471 472 // Check if result string will be latin1 473 bool to_is_latin1 = false; 474 475 // Replacement char must be latin1 476 if (CompactStrings && UNICODE::is_latin1(to_char)) { 477 if (is_latin1) { 478 // Source string is latin1 as well 479 to_is_latin1 = true; 480 } else if (!UNICODE::is_latin1(from_char)) { 481 // We are replacing an UTF16 char. Scan string to 482 // check if result can be latin1 encoded. 483 to_is_latin1 = true; 484 for (index = 0; index < length; index++) { 485 jchar c = value->char_at(index); 486 if (c != from_char && !UNICODE::is_latin1(c)) { 487 to_is_latin1 = false; 488 break; 489 } 490 } 491 } 492 } 493 494 // Create new UNICODE (or byte) buffer. Must handlize value because GC 495 // may happen during String and char array creation. 496 typeArrayHandle h_value(THREAD, value); 497 Handle string = basic_create(length, to_is_latin1, CHECK_NH); 498 typeArrayOop from_buffer = h_value(); 499 typeArrayOop to_buffer = java_lang_String::value(string()); 500 501 // Copy contents 502 for (index = 0; index < length; index++) { 503 jchar c = (!is_latin1) ? from_buffer->char_at(index) : 504 ((jchar) from_buffer->byte_at(index)) & 0xff; 505 if (c == from_char) { 506 c = to_char; 507 } 508 if (!to_is_latin1) { 509 to_buffer->char_at_put(index, c); 510 } else { 511 to_buffer->byte_at_put(index, (jbyte) c); 512 } 513 } 514 return string; 515 } 516 517 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 518 typeArrayOop value = java_lang_String::value(java_string); 519 length = java_lang_String::length(java_string, value); 520 bool is_latin1 = java_lang_String::is_latin1(java_string); 521 522 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 523 if (result != NULL) { 524 if (!is_latin1) { 525 for (int index = 0; index < length; index++) { 526 result[index] = value->char_at(index); 527 } 528 } else { 529 for (int index = 0; index < length; index++) { 530 result[index] = ((jchar) value->byte_at(index)) & 0xff; 531 } 532 } 533 } else { 534 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 535 } 536 return result; 537 } 538 539 unsigned int java_lang_String::hash_code(oop java_string) { 540 // The hash and hashIsZero fields are subject to a benign data race, 541 // making it crucial to ensure that any observable result of the 542 // calculation in this method stays correct under any possible read of 543 // these fields. Necessary restrictions to allow this to be correct 544 // without explicit memory fences or similar concurrency primitives is 545 // that we can ever only write to one of these two fields for a given 546 // String instance, and that the computation is idempotent and derived 547 // from immutable state 548 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized"); 549 if (java_lang_String::hash_is_set(java_string)) { 550 return java_string->int_field(_hash_offset); 551 } 552 553 typeArrayOop value = java_lang_String::value(java_string); 554 int length = java_lang_String::length(java_string, value); 555 bool is_latin1 = java_lang_String::is_latin1(java_string); 556 557 unsigned int hash = 0; 558 if (length > 0) { 559 if (is_latin1) { 560 hash = java_lang_String::hash_code(value->byte_at_addr(0), length); 561 } else { 562 hash = java_lang_String::hash_code(value->char_at_addr(0), length); 563 } 564 } 565 566 if (hash != 0) { 567 java_string->int_field_put(_hash_offset, hash); 568 } else { 569 java_string->bool_field_put(_hashIsZero_offset, true); 570 } 571 return hash; 572 } 573 574 char* java_lang_String::as_quoted_ascii(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); 578 579 if (length == 0) return NULL; 580 581 char* result; 582 int result_length; 583 if (!is_latin1) { 584 jchar* base = value->char_at_addr(0); 585 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 586 result = NEW_RESOURCE_ARRAY(char, result_length); 587 UNICODE::as_quoted_ascii(base, length, result, result_length); 588 } else { 589 jbyte* base = value->byte_at_addr(0); 590 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 591 result = NEW_RESOURCE_ARRAY(char, result_length); 592 UNICODE::as_quoted_ascii(base, length, result, result_length); 593 } 594 assert(result_length >= length + 1, "must not be shorter"); 595 assert(result_length == (int)strlen(result) + 1, "must match"); 596 return result; 597 } 598 599 Symbol* java_lang_String::as_symbol(oop java_string) { 600 typeArrayOop value = java_lang_String::value(java_string); 601 int length = java_lang_String::length(java_string, value); 602 bool is_latin1 = java_lang_String::is_latin1(java_string); 603 if (!is_latin1) { 604 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 605 Symbol* sym = SymbolTable::new_symbol(base, length); 606 return sym; 607 } else { 608 ResourceMark rm; 609 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 610 const char* base = UNICODE::as_utf8(position, length); 611 Symbol* sym = SymbolTable::new_symbol(base, length); 612 return sym; 613 } 614 } 615 616 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 617 typeArrayOop value = java_lang_String::value(java_string); 618 int length = java_lang_String::length(java_string, value); 619 bool is_latin1 = java_lang_String::is_latin1(java_string); 620 if (!is_latin1) { 621 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 622 return SymbolTable::probe_unicode(base, length); 623 } else { 624 ResourceMark rm; 625 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 626 const char* base = UNICODE::as_utf8(position, length); 627 return SymbolTable::probe(base, length); 628 } 629 } 630 631 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) { 632 assert(value_equals(value, java_lang_String::value(java_string)), 633 "value must be same as java_lang_String::value(java_string)"); 634 int length = java_lang_String::length(java_string, value); 635 if (length == 0) { 636 return 0; 637 } 638 if (!java_lang_String::is_latin1(java_string)) { 639 return UNICODE::utf8_length(value->char_at_addr(0), length); 640 } else { 641 return UNICODE::utf8_length(value->byte_at_addr(0), length); 642 } 643 } 644 645 int java_lang_String::utf8_length(oop java_string) { 646 typeArrayOop value = java_lang_String::value(java_string); 647 return utf8_length(java_string, value); 648 } 649 650 char* java_lang_String::as_utf8_string(oop java_string) { 651 int length; 652 return as_utf8_string(java_string, length); 653 } 654 655 char* java_lang_String::as_utf8_string(oop java_string, int& length) { 656 typeArrayOop value = java_lang_String::value(java_string); 657 length = java_lang_String::length(java_string, value); 658 bool is_latin1 = java_lang_String::is_latin1(java_string); 659 if (!is_latin1) { 660 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 661 return UNICODE::as_utf8(position, length); 662 } else { 663 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 664 return UNICODE::as_utf8(position, length); 665 } 666 } 667 668 // Uses a provided buffer if it's sufficiently large, otherwise allocates 669 // a resource array to fit 670 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, int buflen, int& utf8_len) { 671 typeArrayOop value = java_lang_String::value(java_string); 672 int len = java_lang_String::length(java_string, value); 673 bool is_latin1 = java_lang_String::is_latin1(java_string); 674 if (!is_latin1) { 675 jchar *position = (len == 0) ? NULL : value->char_at_addr(0); 676 utf8_len = UNICODE::utf8_length(position, len); 677 if (utf8_len >= buflen) { 678 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 679 } 680 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 681 } else { 682 jbyte *position = (len == 0) ? NULL : value->byte_at_addr(0); 683 utf8_len = UNICODE::utf8_length(position, len); 684 if (utf8_len >= buflen) { 685 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 686 } 687 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 688 } 689 } 690 691 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) { 692 assert(value_equals(value, java_lang_String::value(java_string)), 693 "value must be same as java_lang_String::value(java_string)"); 694 int length = java_lang_String::length(java_string, value); 695 bool is_latin1 = java_lang_String::is_latin1(java_string); 696 if (!is_latin1) { 697 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 698 return UNICODE::as_utf8(position, length, buf, buflen); 699 } else { 700 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 701 return UNICODE::as_utf8(position, length, buf, buflen); 702 } 703 } 704 705 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 706 typeArrayOop value = java_lang_String::value(java_string); 707 return as_utf8_string(java_string, value, buf, buflen); 708 } 709 710 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 711 typeArrayOop value = java_lang_String::value(java_string); 712 bool is_latin1 = java_lang_String::is_latin1(java_string); 713 assert(start + len <= java_lang_String::length(java_string), "just checking"); 714 if (!is_latin1) { 715 jchar* position = value->char_at_addr(start); 716 return UNICODE::as_utf8(position, len); 717 } else { 718 jbyte* position = value->byte_at_addr(start); 719 return UNICODE::as_utf8(position, len); 720 } 721 } 722 723 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) { 724 assert(value_equals(value, java_lang_String::value(java_string)), 725 "value must be same as java_lang_String::value(java_string)"); 726 assert(start + len <= java_lang_String::length(java_string), "just checking"); 727 bool is_latin1 = java_lang_String::is_latin1(java_string); 728 if (!is_latin1) { 729 jchar* position = value->char_at_addr(start); 730 return UNICODE::as_utf8(position, len, buf, buflen); 731 } else { 732 jbyte* position = value->byte_at_addr(start); 733 return UNICODE::as_utf8(position, len, buf, buflen); 734 } 735 } 736 737 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) { 738 assert(java_string->klass() == SystemDictionary::String_klass(), 739 "must be java_string"); 740 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 741 int length = java_lang_String::length(java_string, value); 742 if (length != len) { 743 return false; 744 } 745 bool is_latin1 = java_lang_String::is_latin1(java_string); 746 if (!is_latin1) { 747 for (int i = 0; i < len; i++) { 748 if (value->char_at(i) != chars[i]) { 749 return false; 750 } 751 } 752 } else { 753 for (int i = 0; i < len; i++) { 754 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 755 return false; 756 } 757 } 758 } 759 return true; 760 } 761 762 bool java_lang_String::equals(oop str1, oop str2) { 763 assert(str1->klass() == SystemDictionary::String_klass(), 764 "must be java String"); 765 assert(str2->klass() == SystemDictionary::String_klass(), 766 "must be java String"); 767 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1); 768 bool is_latin1 = java_lang_String::is_latin1(str1); 769 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2); 770 bool is_latin2 = java_lang_String::is_latin1(str2); 771 772 if (is_latin1 != is_latin2) { 773 // Strings with different coders are never equal. 774 return false; 775 } 776 return value_equals(value1, value2); 777 } 778 779 void java_lang_String::print(oop java_string, outputStream* st) { 780 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 781 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 782 783 if (value == NULL) { 784 // This can happen if, e.g., printing a String 785 // object before its initializer has been called 786 st->print("NULL"); 787 return; 788 } 789 790 int length = java_lang_String::length(java_string, value); 791 bool is_latin1 = java_lang_String::is_latin1(java_string); 792 793 st->print("\""); 794 for (int index = 0; index < length; index++) { 795 st->print("%c", (!is_latin1) ? value->char_at(index) : 796 ((jchar) value->byte_at(index)) & 0xff ); 797 } 798 st->print("\""); 799 } 800 801 // java_lang_Class 802 803 int java_lang_Class::_klass_offset; 804 int java_lang_Class::_array_klass_offset; 805 int java_lang_Class::_oop_size_offset; 806 int java_lang_Class::_static_oop_field_count_offset; 807 int java_lang_Class::_class_loader_offset; 808 int java_lang_Class::_module_offset; 809 int java_lang_Class::_protection_domain_offset; 810 int java_lang_Class::_component_mirror_offset; 811 int java_lang_Class::_init_lock_offset; 812 int java_lang_Class::_signers_offset; 813 int java_lang_Class::_name_offset; 814 int java_lang_Class::_source_file_offset; 815 int java_lang_Class::_classData_offset; 816 int java_lang_Class::_classRedefinedCount_offset; 817 818 bool java_lang_Class::_offsets_computed = false; 819 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 820 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL; 821 822 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 823 assert(mirror.not_null() && fd->is_static(), "just checking"); 824 if (fd->has_initial_value()) { 825 BasicType t = fd->field_type(); 826 switch (t) { 827 case T_BYTE: 828 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 829 break; 830 case T_BOOLEAN: 831 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 832 break; 833 case T_CHAR: 834 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 835 break; 836 case T_SHORT: 837 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 838 break; 839 case T_INT: 840 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 841 break; 842 case T_FLOAT: 843 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 844 break; 845 case T_DOUBLE: 846 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 847 break; 848 case T_LONG: 849 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 850 break; 851 case T_OBJECT: 852 { 853 assert(fd->signature() == vmSymbols::string_signature(), 854 "just checking"); 855 if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) { 856 // Archive the String field and update the pointer. 857 oop s = mirror()->obj_field(fd->offset()); 858 oop archived_s = StringTable::create_archived_string(s, CHECK); 859 mirror()->obj_field_put(fd->offset(), archived_s); 860 } else { 861 oop string = fd->string_initial_value(CHECK); 862 mirror()->obj_field_put(fd->offset(), string); 863 } 864 } 865 break; 866 default: 867 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 868 "Illegal ConstantValue attribute in class file"); 869 } 870 } 871 } 872 873 874 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 875 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 876 877 // If the offset was read from the shared archive, it was fixed up already 878 if (!k->is_shared()) { 879 if (k->is_instance_klass()) { 880 // During bootstrap, java.lang.Class wasn't loaded so static field 881 // offsets were computed without the size added it. Go back and 882 // update all the static field offsets to included the size. 883 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) { 884 if (fs.access_flags().is_static()) { 885 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 886 fs.set_offset(real_offset); 887 } 888 } 889 } 890 } 891 892 if (k->is_shared() && k->has_raw_archived_mirror()) { 893 if (HeapShared::open_archive_heap_region_mapped()) { 894 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK); 895 assert(present, "Missing archived mirror for %s", k->external_name()); 896 return; 897 } else { 898 k->set_java_mirror_handle(OopHandle()); 899 k->clear_has_raw_archived_mirror(); 900 } 901 } 902 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK); 903 } 904 905 void java_lang_Class::initialize_mirror_fields(Klass* k, 906 Handle mirror, 907 Handle protection_domain, 908 Handle classData, 909 TRAPS) { 910 // Allocate a simple java object for a lock. 911 // This needs to be a java object because during class initialization 912 // it can be held across a java call. 913 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 914 set_init_lock(mirror(), r); 915 916 // Set protection domain also 917 set_protection_domain(mirror(), protection_domain()); 918 919 // Initialize static fields 920 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 921 922 // Set classData 923 set_class_data(mirror(), classData()); 924 } 925 926 // Set the java.lang.Module module field in the java_lang_Class mirror 927 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) { 928 if (module.is_null()) { 929 // During startup, the module may be NULL only if java.base has not been defined yet. 930 // Put the class on the fixup_module_list to patch later when the java.lang.Module 931 // for java.base is known. But note that since we captured the NULL module another 932 // thread may have completed that initialization. 933 934 bool javabase_was_defined = false; 935 { 936 MutexLocker m1(THREAD, Module_lock); 937 // Keep list of classes needing java.base module fixup 938 if (!ModuleEntryTable::javabase_defined()) { 939 assert(k->java_mirror() != NULL, "Class's mirror is null"); 940 k->class_loader_data()->inc_keep_alive(); 941 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized"); 942 fixup_module_field_list()->push(k); 943 } else { 944 javabase_was_defined = true; 945 } 946 } 947 948 // If java.base was already defined then patch this particular class with java.base. 949 if (javabase_was_defined) { 950 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 951 assert(javabase_entry != NULL && javabase_entry->module() != NULL, 952 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 953 Handle javabase_handle(THREAD, javabase_entry->module()); 954 set_module(mirror(), javabase_handle()); 955 } 956 } else { 957 assert(Universe::is_module_initialized() || 958 (ModuleEntryTable::javabase_defined() && 959 (module() == ModuleEntryTable::javabase_moduleEntry()->module())), 960 "Incorrect java.lang.Module specification while creating mirror"); 961 set_module(mirror(), module()); 962 } 963 } 964 965 // Statically allocate fixup lists because they always get created. 966 void java_lang_Class::allocate_fixup_lists() { 967 GrowableArray<Klass*>* mirror_list = 968 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, mtClass); 969 set_fixup_mirror_list(mirror_list); 970 971 GrowableArray<Klass*>* module_list = 972 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, mtModule); 973 set_fixup_module_field_list(module_list); 974 } 975 976 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 977 Handle module, Handle protection_domain, 978 Handle classData, TRAPS) { 979 assert(k != NULL, "Use create_basic_type_mirror for primitive types"); 980 assert(k->java_mirror() == NULL, "should only assign mirror once"); 981 982 // Use this moment of initialization to cache modifier_flags also, 983 // to support Class.getModifiers(). Instance classes recalculate 984 // the cached flags after the class file is parsed, but before the 985 // class is put into the system dictionary. 986 int computed_modifiers = k->compute_modifier_flags(CHECK); 987 k->set_modifier_flags(computed_modifiers); 988 // Class_klass has to be loaded because it is used to allocate 989 // the mirror. 990 if (SystemDictionary::Class_klass_loaded()) { 991 // Allocate mirror (java.lang.Class instance) 992 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 993 Handle mirror(THREAD, mirror_oop); 994 Handle comp_mirror; 995 996 // Setup indirection from mirror->klass 997 java_lang_Class::set_klass(mirror(), k); 998 999 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 1000 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 1001 1002 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 1003 1004 // It might also have a component mirror. This mirror must already exist. 1005 if (k->is_array_klass()) { 1006 if (k->is_typeArray_klass()) { 1007 BasicType type = TypeArrayKlass::cast(k)->element_type(); 1008 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 1009 } else { 1010 assert(k->is_objArray_klass(), "Must be"); 1011 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1012 assert(element_klass != NULL, "Must have an element klass"); 1013 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 1014 } 1015 assert(comp_mirror() != NULL, "must have a mirror"); 1016 1017 // Two-way link between the array klass and its component mirror: 1018 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 1019 set_component_mirror(mirror(), comp_mirror()); 1020 // See below for ordering dependencies between field array_klass in component mirror 1021 // and java_mirror in this klass. 1022 } else { 1023 assert(k->is_instance_klass(), "Must be"); 1024 1025 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD); 1026 if (HAS_PENDING_EXCEPTION) { 1027 // If any of the fields throws an exception like OOM remove the klass field 1028 // from the mirror so GC doesn't follow it after the klass has been deallocated. 1029 // This mirror looks like a primitive type, which logically it is because it 1030 // it represents no class. 1031 java_lang_Class::set_klass(mirror(), NULL); 1032 return; 1033 } 1034 } 1035 1036 // set the classLoader field in the java_lang_Class instance 1037 assert(class_loader() == k->class_loader(), "should be same"); 1038 set_class_loader(mirror(), class_loader()); 1039 1040 // Setup indirection from klass->mirror 1041 // after any exceptions can happen during allocations. 1042 k->set_java_mirror(mirror); 1043 1044 // Set the module field in the java_lang_Class instance. This must be done 1045 // after the mirror is set. 1046 set_mirror_module_field(k, mirror, module, THREAD); 1047 1048 if (comp_mirror() != NULL) { 1049 // Set after k->java_mirror() is published, because compiled code running 1050 // concurrently doesn't expect a k to have a null java_mirror. 1051 release_set_array_klass(comp_mirror(), k); 1052 } 1053 } else { 1054 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized"); 1055 fixup_mirror_list()->push(k); 1056 } 1057 } 1058 1059 #if INCLUDE_CDS_JAVA_HEAP 1060 // Clears mirror fields. Static final fields with initial values are reloaded 1061 // from constant pool. The object identity hash is in the object header and is 1062 // not affected. 1063 class ResetMirrorField: public FieldClosure { 1064 private: 1065 Handle _m; 1066 1067 public: 1068 ResetMirrorField(Handle mirror) : _m(mirror) {} 1069 1070 void do_field(fieldDescriptor* fd) { 1071 assert(DumpSharedSpaces, "dump time only"); 1072 assert(_m.not_null(), "Mirror cannot be NULL"); 1073 1074 if (fd->is_static() && fd->has_initial_value()) { 1075 initialize_static_field(fd, _m, Thread::current()); 1076 return; 1077 } 1078 1079 BasicType ft = fd->field_type(); 1080 switch (ft) { 1081 case T_BYTE: 1082 _m()->byte_field_put(fd->offset(), 0); 1083 break; 1084 case T_CHAR: 1085 _m()->char_field_put(fd->offset(), 0); 1086 break; 1087 case T_DOUBLE: 1088 _m()->double_field_put(fd->offset(), 0); 1089 break; 1090 case T_FLOAT: 1091 _m()->float_field_put(fd->offset(), 0); 1092 break; 1093 case T_INT: 1094 _m()->int_field_put(fd->offset(), 0); 1095 break; 1096 case T_LONG: 1097 _m()->long_field_put(fd->offset(), 0); 1098 break; 1099 case T_SHORT: 1100 _m()->short_field_put(fd->offset(), 0); 1101 break; 1102 case T_BOOLEAN: 1103 _m()->bool_field_put(fd->offset(), false); 1104 break; 1105 case T_ARRAY: 1106 case T_OBJECT: { 1107 // It might be useful to cache the String field, but 1108 // for now just clear out any reference field 1109 oop o = _m()->obj_field(fd->offset()); 1110 _m()->obj_field_put(fd->offset(), NULL); 1111 break; 1112 } 1113 default: 1114 ShouldNotReachHere(); 1115 break; 1116 } 1117 } 1118 }; 1119 1120 void java_lang_Class::archive_basic_type_mirrors(TRAPS) { 1121 assert(HeapShared::is_heap_object_archiving_allowed(), 1122 "HeapShared::is_heap_object_archiving_allowed() must be true"); 1123 1124 for (int t = 0; t <= T_VOID; t++) { 1125 oop m = Universe::_mirrors[t]; 1126 if (m != NULL) { 1127 // Update the field at _array_klass_offset to point to the relocated array klass. 1128 oop archived_m = HeapShared::archive_heap_object(m, THREAD); 1129 assert(archived_m != NULL, "sanity"); 1130 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset)); 1131 assert(ak != NULL || t == T_VOID, "should not be NULL"); 1132 if (ak != NULL) { 1133 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak, true); 1134 archived_m->metadata_field_put(_array_klass_offset, reloc_ak); 1135 } 1136 1137 // Clear the fields. Just to be safe 1138 Klass *k = m->klass(); 1139 Handle archived_mirror_h(THREAD, archived_m); 1140 ResetMirrorField reset(archived_mirror_h); 1141 InstanceKlass::cast(k)->do_nonstatic_fields(&reset); 1142 1143 log_trace(cds, heap, mirror)( 1144 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1145 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m)); 1146 1147 Universe::_mirrors[t] = archived_m; 1148 } 1149 } 1150 1151 assert(Universe::_mirrors[T_INT] != NULL && 1152 Universe::_mirrors[T_FLOAT] != NULL && 1153 Universe::_mirrors[T_DOUBLE] != NULL && 1154 Universe::_mirrors[T_BYTE] != NULL && 1155 Universe::_mirrors[T_BOOLEAN] != NULL && 1156 Universe::_mirrors[T_CHAR] != NULL && 1157 Universe::_mirrors[T_LONG] != NULL && 1158 Universe::_mirrors[T_SHORT] != NULL && 1159 Universe::_mirrors[T_VOID] != NULL, "sanity"); 1160 1161 Universe::set_int_mirror(Universe::_mirrors[T_INT]); 1162 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]); 1163 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]); 1164 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]); 1165 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]); 1166 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]); 1167 Universe::set_long_mirror(Universe::_mirrors[T_LONG]); 1168 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]); 1169 Universe::set_void_mirror(Universe::_mirrors[T_VOID]); 1170 } 1171 1172 // 1173 // After the mirror object is successfully archived, the archived 1174 // klass is set with _has_archived_raw_mirror flag. 1175 // 1176 // The _has_archived_raw_mirror flag is cleared at runtime when the 1177 // archived mirror is restored. If archived java heap data cannot 1178 // be used at runtime, new mirror object is created for the shared 1179 // class. The _has_archived_raw_mirror is cleared also during the process. 1180 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) { 1181 assert(HeapShared::is_heap_object_archiving_allowed(), 1182 "HeapShared::is_heap_object_archiving_allowed() must be true"); 1183 1184 // Mirror is already archived 1185 if (k->has_raw_archived_mirror()) { 1186 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror"); 1187 return k->archived_java_mirror_raw(); 1188 } 1189 1190 // No mirror 1191 oop mirror = k->java_mirror(); 1192 if (mirror == NULL) { 1193 return NULL; 1194 } 1195 1196 if (k->is_instance_klass()) { 1197 InstanceKlass *ik = InstanceKlass::cast(k); 1198 assert(ik->signers() == NULL, "class with signer should have been excluded"); 1199 1200 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() || 1201 ik->is_shared_app_class())) { 1202 // Archiving mirror for classes from non-builtin loaders is not 1203 // supported. Clear the _java_mirror within the archived class. 1204 k->set_java_mirror_handle(OopHandle()); 1205 return NULL; 1206 } 1207 } 1208 1209 // Now start archiving the mirror object 1210 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD); 1211 if (archived_mirror == NULL) { 1212 return NULL; 1213 } 1214 1215 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD); 1216 if (archived_mirror == NULL) { 1217 return NULL; 1218 } 1219 1220 k->set_archived_java_mirror_raw(archived_mirror); 1221 1222 k->set_has_raw_archived_mirror(); 1223 1224 ResourceMark rm; 1225 log_trace(cds, heap, mirror)( 1226 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1227 k->external_name(), p2i(mirror), p2i(archived_mirror)); 1228 1229 return archived_mirror; 1230 } 1231 1232 // The process is based on create_mirror(). 1233 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror, 1234 oop archived_mirror, 1235 Thread *THREAD) { 1236 // Clear nonstatic fields in archived mirror. Some of the fields will be set 1237 // to archived metadata and objects below. 1238 Klass *c = archived_mirror->klass(); 1239 Handle archived_mirror_h(THREAD, archived_mirror); 1240 ResetMirrorField reset(archived_mirror_h); 1241 InstanceKlass::cast(c)->do_nonstatic_fields(&reset); 1242 1243 if (k->is_array_klass()) { 1244 oop archived_comp_mirror; 1245 if (k->is_typeArray_klass()) { 1246 // The primitive type mirrors are already archived. Get the archived mirror. 1247 oop comp_mirror = java_lang_Class::component_mirror(mirror); 1248 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror); 1249 assert(archived_comp_mirror != NULL, "Must be"); 1250 } else { 1251 assert(k->is_objArray_klass(), "Must be"); 1252 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1253 assert(element_klass != NULL, "Must have an element klass"); 1254 archived_comp_mirror = archive_mirror(element_klass, THREAD); 1255 if (archived_comp_mirror == NULL) { 1256 return NULL; 1257 } 1258 } 1259 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror); 1260 } else { 1261 assert(k->is_instance_klass(), "Must be"); 1262 1263 // Reset local static fields in the mirror 1264 InstanceKlass::cast(k)->do_local_static_fields(&reset); 1265 1266 java_lang_Class:set_init_lock(archived_mirror, NULL); 1267 1268 set_protection_domain(archived_mirror, NULL); 1269 } 1270 1271 // clear class loader and mirror_module_field 1272 set_class_loader(archived_mirror, NULL); 1273 set_module(archived_mirror, NULL); 1274 1275 // The archived mirror's field at _klass_offset is still pointing to the original 1276 // klass. Updated the field in the archived mirror to point to the relocated 1277 // klass in the archive. 1278 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror), true); 1279 log_debug(cds, heap, mirror)( 1280 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1281 p2i(as_Klass(mirror)), p2i(reloc_k)); 1282 archived_mirror->metadata_field_put(_klass_offset, reloc_k); 1283 1284 // The field at _array_klass_offset is pointing to the original one dimension 1285 // higher array klass if exists. Relocate the pointer. 1286 Klass *arr = array_klass_acquire(mirror); 1287 if (arr != NULL) { 1288 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr, true); 1289 log_debug(cds, heap, mirror)( 1290 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1291 p2i(arr), p2i(reloc_arr)); 1292 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr); 1293 } 1294 return archived_mirror; 1295 } 1296 1297 void java_lang_Class::update_archived_primitive_mirror_native_pointers(oop archived_mirror) { 1298 if (MetaspaceShared::relocation_delta() != 0) { 1299 assert(archived_mirror->metadata_field(_klass_offset) == NULL, "must be for primitive class"); 1300 1301 Klass* ak = ((Klass*)archived_mirror->metadata_field(_array_klass_offset)); 1302 if (ak != NULL) { 1303 archived_mirror->metadata_field_put(_array_klass_offset, 1304 (Klass*)(address(ak) + MetaspaceShared::relocation_delta())); 1305 } 1306 } 1307 } 1308 1309 void java_lang_Class::update_archived_mirror_native_pointers(oop archived_mirror) { 1310 assert(MetaspaceShared::relocation_delta() != 0, "must be"); 1311 1312 Klass* k = ((Klass*)archived_mirror->metadata_field(_klass_offset)); 1313 archived_mirror->metadata_field_put(_klass_offset, 1314 (Klass*)(address(k) + MetaspaceShared::relocation_delta())); 1315 1316 Klass* ak = ((Klass*)archived_mirror->metadata_field(_array_klass_offset)); 1317 if (ak != NULL) { 1318 archived_mirror->metadata_field_put(_array_klass_offset, 1319 (Klass*)(address(ak) + MetaspaceShared::relocation_delta())); 1320 } 1321 } 1322 1323 1324 // Returns true if the mirror is updated, false if no archived mirror 1325 // data is present. After the archived mirror object is restored, the 1326 // shared klass' _has_raw_archived_mirror flag is cleared. 1327 bool java_lang_Class::restore_archived_mirror(Klass *k, 1328 Handle class_loader, Handle module, 1329 Handle protection_domain, TRAPS) { 1330 // Postpone restoring archived mirror until java.lang.Class is loaded. Please 1331 // see more details in SystemDictionary::resolve_well_known_classes(). 1332 if (!SystemDictionary::Class_klass_loaded()) { 1333 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized"); 1334 fixup_mirror_list()->push(k); 1335 return true; 1336 } 1337 1338 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow()); 1339 if (m == NULL) { 1340 return false; 1341 } 1342 1343 // mirror is archived, restore 1344 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m)); 1345 assert(HeapShared::is_archived_object(m), "must be archived mirror object"); 1346 assert(as_Klass(m) == k, "must be"); 1347 Handle mirror(THREAD, m); 1348 1349 if (!k->is_array_klass()) { 1350 // - local static final fields with initial values were initialized at dump time 1351 1352 // create the init_lock 1353 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false)); 1354 set_init_lock(mirror(), r); 1355 1356 if (protection_domain.not_null()) { 1357 set_protection_domain(mirror(), protection_domain()); 1358 } 1359 } 1360 1361 assert(class_loader() == k->class_loader(), "should be same"); 1362 if (class_loader.not_null()) { 1363 set_class_loader(mirror(), class_loader()); 1364 } 1365 1366 k->set_java_mirror(mirror); 1367 k->clear_has_raw_archived_mirror(); 1368 1369 set_mirror_module_field(k, mirror, module, THREAD); 1370 1371 if (log_is_enabled(Trace, cds, heap, mirror)) { 1372 ResourceMark rm(THREAD); 1373 log_trace(cds, heap, mirror)( 1374 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1375 } 1376 1377 return true; 1378 } 1379 #endif // INCLUDE_CDS_JAVA_HEAP 1380 1381 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1382 assert(_module_offset != 0, "must have been computed already"); 1383 java_lang_Class::set_module(k->java_mirror(), module()); 1384 } 1385 1386 int java_lang_Class::oop_size(oop java_class) { 1387 assert(_oop_size_offset != 0, "must be set"); 1388 int size = java_class->int_field(_oop_size_offset); 1389 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1390 return size; 1391 } 1392 1393 1394 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) { 1395 assert(_oop_size_offset != 0, "must be set"); 1396 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1397 *(int*)(((char*)java_class) + _oop_size_offset) = size; 1398 } 1399 1400 int java_lang_Class::static_oop_field_count(oop java_class) { 1401 assert(_static_oop_field_count_offset != 0, "must be set"); 1402 return java_class->int_field(_static_oop_field_count_offset); 1403 } 1404 1405 int java_lang_Class::static_oop_field_count_raw(oop java_class) { 1406 assert(_static_oop_field_count_offset != 0, "must be set"); 1407 return java_class->int_field_raw(_static_oop_field_count_offset); 1408 } 1409 1410 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1411 assert(_static_oop_field_count_offset != 0, "must be set"); 1412 java_class->int_field_put(_static_oop_field_count_offset, size); 1413 } 1414 1415 oop java_lang_Class::protection_domain(oop java_class) { 1416 assert(_protection_domain_offset != 0, "must be set"); 1417 return java_class->obj_field(_protection_domain_offset); 1418 } 1419 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1420 assert(_protection_domain_offset != 0, "must be set"); 1421 java_class->obj_field_put(_protection_domain_offset, pd); 1422 } 1423 1424 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1425 assert(_component_mirror_offset != 0, "must be set"); 1426 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1427 } 1428 oop java_lang_Class::component_mirror(oop java_class) { 1429 assert(_component_mirror_offset != 0, "must be set"); 1430 return java_class->obj_field(_component_mirror_offset); 1431 } 1432 1433 oop java_lang_Class::init_lock(oop java_class) { 1434 assert(_init_lock_offset != 0, "must be set"); 1435 return java_class->obj_field(_init_lock_offset); 1436 } 1437 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 1438 assert(_init_lock_offset != 0, "must be set"); 1439 java_class->obj_field_put(_init_lock_offset, init_lock); 1440 } 1441 1442 objArrayOop java_lang_Class::signers(oop java_class) { 1443 assert(_signers_offset != 0, "must be set"); 1444 return (objArrayOop)java_class->obj_field(_signers_offset); 1445 } 1446 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 1447 assert(_signers_offset != 0, "must be set"); 1448 java_class->obj_field_put(_signers_offset, (oop)signers); 1449 } 1450 1451 oop java_lang_Class::class_data(oop java_class) { 1452 assert(_classData_offset != 0, "must be set"); 1453 return java_class->obj_field(_classData_offset); 1454 } 1455 void java_lang_Class::set_class_data(oop java_class, oop class_data) { 1456 assert(_classData_offset != 0, "must be set"); 1457 java_class->obj_field_put(_classData_offset, class_data); 1458 } 1459 1460 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1461 assert(_class_loader_offset != 0, "offsets should have been initialized"); 1462 java_class->obj_field_put(_class_loader_offset, loader); 1463 } 1464 1465 oop java_lang_Class::class_loader(oop java_class) { 1466 assert(_class_loader_offset != 0, "must be set"); 1467 return java_class->obj_field(_class_loader_offset); 1468 } 1469 1470 oop java_lang_Class::module(oop java_class) { 1471 assert(_module_offset != 0, "must be set"); 1472 return java_class->obj_field(_module_offset); 1473 } 1474 1475 void java_lang_Class::set_module(oop java_class, oop module) { 1476 assert(_module_offset != 0, "must be set"); 1477 java_class->obj_field_put(_module_offset, module); 1478 } 1479 1480 oop java_lang_Class::name(Handle java_class, TRAPS) { 1481 assert(_name_offset != 0, "must be set"); 1482 oop o = java_class->obj_field(_name_offset); 1483 if (o == NULL) { 1484 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD); 1485 java_class->obj_field_put(_name_offset, o); 1486 } 1487 return o; 1488 } 1489 1490 oop java_lang_Class::source_file(oop java_class) { 1491 assert(_source_file_offset != 0, "must be set"); 1492 return java_class->obj_field(_source_file_offset); 1493 } 1494 1495 void java_lang_Class::set_source_file(oop java_class, oop source_file) { 1496 assert(_source_file_offset != 0, "must be set"); 1497 java_class->obj_field_put(_source_file_offset, source_file); 1498 } 1499 1500 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1501 // This should be improved by adding a field at the Java level or by 1502 // introducing a new VM klass (see comment in ClassFileParser) 1503 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_NULL); 1504 if (type != T_VOID) { 1505 Klass* aklass = Universe::typeArrayKlassObj(type); 1506 assert(aklass != NULL, "correct bootstrap"); 1507 release_set_array_klass(java_class, aklass); 1508 } 1509 #ifdef ASSERT 1510 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 1511 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1512 #endif 1513 return java_class; 1514 } 1515 1516 1517 Klass* java_lang_Class::as_Klass_raw(oop java_class) { 1518 //%note memory_2 1519 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1520 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset)); 1521 assert(k == NULL || k->is_klass(), "type check"); 1522 return k; 1523 } 1524 1525 1526 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1527 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1528 java_class->metadata_field_put(_klass_offset, klass); 1529 } 1530 1531 1532 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1533 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1534 Symbol* name = NULL; 1535 bool is_instance = false; 1536 if (is_primitive(java_class)) { 1537 name = vmSymbols::type_signature(primitive_type(java_class)); 1538 } else { 1539 Klass* k = as_Klass(java_class); 1540 is_instance = k->is_instance_klass(); 1541 name = k->name(); 1542 } 1543 if (name == NULL) { 1544 st->print("<null>"); 1545 return; 1546 } 1547 if (is_instance) st->print("L"); 1548 st->write((char*) name->base(), (int) name->utf8_length()); 1549 if (is_instance) st->print(";"); 1550 } 1551 1552 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) { 1553 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1554 Symbol* name; 1555 if (is_primitive(java_class)) { 1556 name = vmSymbols::type_signature(primitive_type(java_class)); 1557 // Because this can create a new symbol, the caller has to decrement 1558 // the refcount, so make adjustment here and below for symbols returned 1559 // that are not created or incremented due to a successful lookup. 1560 name->increment_refcount(); 1561 } else { 1562 Klass* k = as_Klass(java_class); 1563 if (!k->is_instance_klass()) { 1564 name = k->name(); 1565 name->increment_refcount(); 1566 } else { 1567 ResourceMark rm; 1568 const char* sigstr = k->signature_name(); 1569 int siglen = (int) strlen(sigstr); 1570 if (!intern_if_not_found) { 1571 name = SymbolTable::probe(sigstr, siglen); 1572 } else { 1573 name = SymbolTable::new_symbol(sigstr, siglen); 1574 } 1575 } 1576 } 1577 return name; 1578 } 1579 1580 // Returns the Java name for this Java mirror (Resource allocated) 1581 // See Klass::external_name(). 1582 // For primitive type Java mirrors, its type name is returned. 1583 const char* java_lang_Class::as_external_name(oop java_class) { 1584 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1585 const char* name = NULL; 1586 if (is_primitive(java_class)) { 1587 name = type2name(primitive_type(java_class)); 1588 } else { 1589 name = as_Klass(java_class)->external_name(); 1590 } 1591 if (name == NULL) { 1592 name = "<null>"; 1593 } 1594 return name; 1595 } 1596 1597 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1598 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1599 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass"); 1600 return k; 1601 } 1602 1603 1604 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1605 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1606 java_class->release_metadata_field_put(_array_klass_offset, klass); 1607 } 1608 1609 1610 BasicType java_lang_Class::primitive_type(oop java_class) { 1611 assert(java_lang_Class::is_primitive(java_class), "just checking"); 1612 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1613 BasicType type = T_VOID; 1614 if (ak != NULL) { 1615 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1616 type = ArrayKlass::cast(ak)->element_type(); 1617 } else { 1618 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1619 } 1620 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1621 return type; 1622 } 1623 1624 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1625 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1626 if (is_primitive(java_class)) { 1627 if (reference_klass != NULL) 1628 (*reference_klass) = NULL; 1629 return primitive_type(java_class); 1630 } else { 1631 if (reference_klass != NULL) 1632 (*reference_klass) = as_Klass(java_class); 1633 return T_OBJECT; 1634 } 1635 } 1636 1637 1638 oop java_lang_Class::primitive_mirror(BasicType t) { 1639 oop mirror = Universe::java_mirror(t); 1640 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 1641 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 1642 return mirror; 1643 } 1644 1645 #define CLASS_FIELDS_DO(macro) \ 1646 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \ 1647 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1648 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1649 macro(_module_offset, k, "module", module_signature, false); \ 1650 macro(_name_offset, k, "name", string_signature, false); \ 1651 macro(_classData_offset, k, "classData", object_signature, false); 1652 1653 void java_lang_Class::compute_offsets() { 1654 if (_offsets_computed) { 1655 return; 1656 } 1657 1658 _offsets_computed = true; 1659 1660 InstanceKlass* k = SystemDictionary::Class_klass(); 1661 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1662 1663 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 1664 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 1665 // GC treats them the same. 1666 _init_lock_offset = _component_mirror_offset; 1667 1668 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1669 } 1670 1671 #if INCLUDE_CDS 1672 void java_lang_Class::serialize_offsets(SerializeClosure* f) { 1673 f->do_bool(&_offsets_computed); 1674 f->do_u4((u4*)&_init_lock_offset); 1675 1676 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1677 1678 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1679 } 1680 #endif 1681 1682 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1683 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1684 return the_class_mirror->int_field(_classRedefinedCount_offset); 1685 } 1686 1687 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1688 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1689 the_class_mirror->int_field_put(_classRedefinedCount_offset, value); 1690 } 1691 1692 1693 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1694 // platform thread structure, and a eetop offset which was used for thread 1695 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1696 // merged, so in the HotSpot VM we just use the eetop field for the thread 1697 // instead of the privateInfo_offset. 1698 // 1699 // Note: The stackSize field is only present starting in 1.4. 1700 1701 int java_lang_Thread::_name_offset; 1702 int java_lang_Thread::_group_offset; 1703 int java_lang_Thread::_contextClassLoader_offset; 1704 int java_lang_Thread::_inheritedAccessControlContext_offset; 1705 int java_lang_Thread::_priority_offset; 1706 int java_lang_Thread::_eetop_offset; 1707 int java_lang_Thread::_interrupted_offset; 1708 int java_lang_Thread::_daemon_offset; 1709 int java_lang_Thread::_stillborn_offset; 1710 int java_lang_Thread::_stackSize_offset; 1711 int java_lang_Thread::_tid_offset; 1712 int java_lang_Thread::_thread_status_offset; 1713 int java_lang_Thread::_park_blocker_offset; 1714 1715 #define THREAD_FIELDS_DO(macro) \ 1716 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1717 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1718 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \ 1719 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \ 1720 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1721 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1722 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1723 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \ 1724 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \ 1725 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1726 macro(_tid_offset, k, "tid", long_signature, false); \ 1727 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \ 1728 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false) 1729 1730 void java_lang_Thread::compute_offsets() { 1731 assert(_group_offset == 0, "offsets should be initialized only once"); 1732 1733 InstanceKlass* k = SystemDictionary::Thread_klass(); 1734 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1735 } 1736 1737 #if INCLUDE_CDS 1738 void java_lang_Thread::serialize_offsets(SerializeClosure* f) { 1739 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1740 } 1741 #endif 1742 1743 JavaThread* java_lang_Thread::thread(oop java_thread) { 1744 return (JavaThread*)java_thread->address_field(_eetop_offset); 1745 } 1746 1747 1748 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1749 java_thread->address_field_put(_eetop_offset, (address)thread); 1750 } 1751 1752 bool java_lang_Thread::interrupted(oop java_thread) { 1753 // Make sure the caller can safely access oops. 1754 assert(Thread::current()->is_VM_thread() || 1755 (JavaThread::current()->thread_state() != _thread_blocked && 1756 JavaThread::current()->thread_state() != _thread_in_native), 1757 "Unsafe access to oop"); 1758 return java_thread->bool_field_volatile(_interrupted_offset); 1759 } 1760 1761 void java_lang_Thread::set_interrupted(oop java_thread, bool val) { 1762 // Make sure the caller can safely access oops. 1763 assert(Thread::current()->is_VM_thread() || 1764 (JavaThread::current()->thread_state() != _thread_blocked && 1765 JavaThread::current()->thread_state() != _thread_in_native), 1766 "Unsafe access to oop"); 1767 java_thread->bool_field_put_volatile(_interrupted_offset, val); 1768 } 1769 1770 1771 oop java_lang_Thread::name(oop java_thread) { 1772 return java_thread->obj_field(_name_offset); 1773 } 1774 1775 1776 void java_lang_Thread::set_name(oop java_thread, oop name) { 1777 java_thread->obj_field_put(_name_offset, name); 1778 } 1779 1780 1781 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1782 return (ThreadPriority)java_thread->int_field(_priority_offset); 1783 } 1784 1785 1786 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1787 java_thread->int_field_put(_priority_offset, priority); 1788 } 1789 1790 1791 oop java_lang_Thread::threadGroup(oop java_thread) { 1792 return java_thread->obj_field(_group_offset); 1793 } 1794 1795 1796 bool java_lang_Thread::is_stillborn(oop java_thread) { 1797 return java_thread->bool_field(_stillborn_offset) != 0; 1798 } 1799 1800 1801 // We never have reason to turn the stillborn bit off 1802 void java_lang_Thread::set_stillborn(oop java_thread) { 1803 java_thread->bool_field_put(_stillborn_offset, true); 1804 } 1805 1806 1807 bool java_lang_Thread::is_alive(oop java_thread) { 1808 JavaThread* thr = java_lang_Thread::thread(java_thread); 1809 return (thr != NULL); 1810 } 1811 1812 1813 bool java_lang_Thread::is_daemon(oop java_thread) { 1814 return java_thread->bool_field(_daemon_offset) != 0; 1815 } 1816 1817 1818 void java_lang_Thread::set_daemon(oop java_thread) { 1819 java_thread->bool_field_put(_daemon_offset, true); 1820 } 1821 1822 oop java_lang_Thread::context_class_loader(oop java_thread) { 1823 return java_thread->obj_field(_contextClassLoader_offset); 1824 } 1825 1826 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1827 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1828 } 1829 1830 1831 jlong java_lang_Thread::stackSize(oop java_thread) { 1832 return java_thread->long_field(_stackSize_offset); 1833 } 1834 1835 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1836 void java_lang_Thread::set_thread_status(oop java_thread, 1837 java_lang_Thread::ThreadStatus status) { 1838 java_thread->int_field_put(_thread_status_offset, status); 1839 } 1840 1841 // Read thread status value from threadStatus field in java.lang.Thread java class. 1842 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1843 // Make sure the caller is operating on behalf of the VM or is 1844 // running VM code (state == _thread_in_vm). 1845 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1846 JavaThread::current()->thread_state() == _thread_in_vm, 1847 "Java Thread is not running in vm"); 1848 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1849 } 1850 1851 1852 jlong java_lang_Thread::thread_id(oop java_thread) { 1853 return java_thread->long_field(_tid_offset); 1854 } 1855 1856 oop java_lang_Thread::park_blocker(oop java_thread) { 1857 return java_thread->obj_field(_park_blocker_offset); 1858 } 1859 1860 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1861 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1862 switch (status) { 1863 case NEW : return "NEW"; 1864 case RUNNABLE : return "RUNNABLE"; 1865 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1866 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1867 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1868 case PARKED : return "WAITING (parking)"; 1869 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1870 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1871 case TERMINATED : return "TERMINATED"; 1872 default : return "UNKNOWN"; 1873 }; 1874 } 1875 int java_lang_ThreadGroup::_parent_offset; 1876 int java_lang_ThreadGroup::_name_offset; 1877 int java_lang_ThreadGroup::_threads_offset; 1878 int java_lang_ThreadGroup::_groups_offset; 1879 int java_lang_ThreadGroup::_maxPriority_offset; 1880 int java_lang_ThreadGroup::_destroyed_offset; 1881 int java_lang_ThreadGroup::_daemon_offset; 1882 int java_lang_ThreadGroup::_nthreads_offset; 1883 int java_lang_ThreadGroup::_ngroups_offset; 1884 1885 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1886 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1887 return java_thread_group->obj_field(_parent_offset); 1888 } 1889 1890 // ("name as oop" accessor is not necessary) 1891 1892 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1893 oop name = java_thread_group->obj_field(_name_offset); 1894 // ThreadGroup.name can be null 1895 if (name != NULL) { 1896 return java_lang_String::as_utf8_string(name); 1897 } 1898 return NULL; 1899 } 1900 1901 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1902 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1903 return java_thread_group->int_field(_nthreads_offset); 1904 } 1905 1906 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1907 oop threads = java_thread_group->obj_field(_threads_offset); 1908 assert(threads != NULL, "threadgroups should have threads"); 1909 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1910 return objArrayOop(threads); 1911 } 1912 1913 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1914 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1915 return java_thread_group->int_field(_ngroups_offset); 1916 } 1917 1918 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1919 oop groups = java_thread_group->obj_field(_groups_offset); 1920 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1921 return objArrayOop(groups); 1922 } 1923 1924 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1925 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1926 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1927 } 1928 1929 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1930 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1931 return java_thread_group->bool_field(_destroyed_offset) != 0; 1932 } 1933 1934 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1935 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1936 return java_thread_group->bool_field(_daemon_offset) != 0; 1937 } 1938 1939 #define THREADGROUP_FIELDS_DO(macro) \ 1940 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \ 1941 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1942 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \ 1943 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \ 1944 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \ 1945 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \ 1946 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1947 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \ 1948 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false) 1949 1950 void java_lang_ThreadGroup::compute_offsets() { 1951 assert(_parent_offset == 0, "offsets should be initialized only once"); 1952 1953 InstanceKlass* k = SystemDictionary::ThreadGroup_klass(); 1954 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1955 } 1956 1957 #if INCLUDE_CDS 1958 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) { 1959 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1960 } 1961 #endif 1962 1963 // java_lang_Throwable 1964 1965 int java_lang_Throwable::_backtrace_offset; 1966 int java_lang_Throwable::_detailMessage_offset; 1967 int java_lang_Throwable::_stackTrace_offset; 1968 int java_lang_Throwable::_depth_offset; 1969 int java_lang_Throwable::_static_unassigned_stacktrace_offset; 1970 1971 #define THROWABLE_FIELDS_DO(macro) \ 1972 macro(_backtrace_offset, k, "backtrace", object_signature, false); \ 1973 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \ 1974 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 1975 macro(_depth_offset, k, "depth", int_signature, false); \ 1976 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 1977 1978 void java_lang_Throwable::compute_offsets() { 1979 InstanceKlass* k = SystemDictionary::Throwable_klass(); 1980 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1981 } 1982 1983 #if INCLUDE_CDS 1984 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) { 1985 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1986 } 1987 #endif 1988 1989 oop java_lang_Throwable::unassigned_stacktrace() { 1990 InstanceKlass* ik = SystemDictionary::Throwable_klass(); 1991 oop base = ik->static_field_base_raw(); 1992 return base->obj_field(_static_unassigned_stacktrace_offset); 1993 } 1994 1995 oop java_lang_Throwable::backtrace(oop throwable) { 1996 return throwable->obj_field_acquire(_backtrace_offset); 1997 } 1998 1999 2000 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 2001 throwable->release_obj_field_put(_backtrace_offset, value); 2002 } 2003 2004 int java_lang_Throwable::depth(oop throwable) { 2005 return throwable->int_field(_depth_offset); 2006 } 2007 2008 void java_lang_Throwable::set_depth(oop throwable, int value) { 2009 throwable->int_field_put(_depth_offset, value); 2010 } 2011 2012 oop java_lang_Throwable::message(oop throwable) { 2013 return throwable->obj_field(_detailMessage_offset); 2014 } 2015 2016 2017 // Return Symbol for detailed_message or NULL 2018 Symbol* java_lang_Throwable::detail_message(oop throwable) { 2019 PRESERVE_EXCEPTION_MARK; // Keep original exception 2020 oop detailed_message = java_lang_Throwable::message(throwable); 2021 if (detailed_message != NULL) { 2022 return java_lang_String::as_symbol(detailed_message); 2023 } 2024 return NULL; 2025 } 2026 2027 void java_lang_Throwable::set_message(oop throwable, oop value) { 2028 throwable->obj_field_put(_detailMessage_offset, value); 2029 } 2030 2031 2032 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 2033 throwable->obj_field_put(_stackTrace_offset, st_element_array); 2034 } 2035 2036 void java_lang_Throwable::clear_stacktrace(oop throwable) { 2037 set_stacktrace(throwable, NULL); 2038 } 2039 2040 2041 void java_lang_Throwable::print(oop throwable, outputStream* st) { 2042 ResourceMark rm; 2043 Klass* k = throwable->klass(); 2044 assert(k != NULL, "just checking"); 2045 st->print("%s", k->external_name()); 2046 oop msg = message(throwable); 2047 if (msg != NULL) { 2048 st->print(": %s", java_lang_String::as_utf8_string(msg)); 2049 } 2050 } 2051 2052 // After this many redefines, the stack trace is unreliable. 2053 const int MAX_VERSION = USHRT_MAX; 2054 2055 static inline bool version_matches(Method* method, int version) { 2056 assert(version < MAX_VERSION, "version is too big"); 2057 return method != NULL && (method->constants()->version() == version); 2058 } 2059 2060 // This class provides a simple wrapper over the internal structure of 2061 // exception backtrace to insulate users of the backtrace from needing 2062 // to know what it looks like. 2063 // The code of this class is not GC safe. Allocations can only happen 2064 // in expand(). 2065 class BacktraceBuilder: public StackObj { 2066 friend class BacktraceIterator; 2067 private: 2068 Handle _backtrace; 2069 objArrayOop _head; 2070 typeArrayOop _methods; 2071 typeArrayOop _bcis; 2072 objArrayOop _mirrors; 2073 typeArrayOop _names; // Needed to insulate method name against redefinition. 2074 // True if the top frame of the backtrace is omitted because it shall be hidden. 2075 bool _has_hidden_top_frame; 2076 int _index; 2077 NoSafepointVerifier _nsv; 2078 2079 enum { 2080 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 2081 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 2082 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 2083 trace_names_offset = java_lang_Throwable::trace_names_offset, 2084 trace_next_offset = java_lang_Throwable::trace_next_offset, 2085 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset, 2086 trace_size = java_lang_Throwable::trace_size, 2087 trace_chunk_size = java_lang_Throwable::trace_chunk_size 2088 }; 2089 2090 // get info out of chunks 2091 static typeArrayOop get_methods(objArrayHandle chunk) { 2092 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 2093 assert(methods != NULL, "method array should be initialized in backtrace"); 2094 return methods; 2095 } 2096 static typeArrayOop get_bcis(objArrayHandle chunk) { 2097 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 2098 assert(bcis != NULL, "bci array should be initialized in backtrace"); 2099 return bcis; 2100 } 2101 static objArrayOop get_mirrors(objArrayHandle chunk) { 2102 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 2103 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 2104 return mirrors; 2105 } 2106 static typeArrayOop get_names(objArrayHandle chunk) { 2107 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 2108 assert(names != NULL, "names array should be initialized in backtrace"); 2109 return names; 2110 } 2111 static bool has_hidden_top_frame(objArrayHandle chunk) { 2112 oop hidden = chunk->obj_at(trace_hidden_offset); 2113 return hidden != NULL; 2114 } 2115 2116 public: 2117 2118 // constructor for new backtrace 2119 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL), _has_hidden_top_frame(false) { 2120 expand(CHECK); 2121 _backtrace = Handle(THREAD, _head); 2122 _index = 0; 2123 } 2124 2125 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 2126 _methods = get_methods(backtrace); 2127 _bcis = get_bcis(backtrace); 2128 _mirrors = get_mirrors(backtrace); 2129 _names = get_names(backtrace); 2130 _has_hidden_top_frame = has_hidden_top_frame(backtrace); 2131 assert(_methods->length() == _bcis->length() && 2132 _methods->length() == _mirrors->length() && 2133 _mirrors->length() == _names->length(), 2134 "method and source information arrays should match"); 2135 2136 // head is the preallocated backtrace 2137 _head = backtrace(); 2138 _backtrace = Handle(thread, _head); 2139 _index = 0; 2140 } 2141 2142 void expand(TRAPS) { 2143 objArrayHandle old_head(THREAD, _head); 2144 PauseNoSafepointVerifier pnsv(&_nsv); 2145 2146 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2147 objArrayHandle new_head(THREAD, head); 2148 2149 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2150 typeArrayHandle new_methods(THREAD, methods); 2151 2152 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2153 typeArrayHandle new_bcis(THREAD, bcis); 2154 2155 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2156 objArrayHandle new_mirrors(THREAD, mirrors); 2157 2158 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2159 typeArrayHandle new_names(THREAD, names); 2160 2161 if (!old_head.is_null()) { 2162 old_head->obj_at_put(trace_next_offset, new_head()); 2163 } 2164 new_head->obj_at_put(trace_methods_offset, new_methods()); 2165 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2166 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2167 new_head->obj_at_put(trace_names_offset, new_names()); 2168 new_head->obj_at_put(trace_hidden_offset, NULL); 2169 2170 _head = new_head(); 2171 _methods = new_methods(); 2172 _bcis = new_bcis(); 2173 _mirrors = new_mirrors(); 2174 _names = new_names(); 2175 _index = 0; 2176 } 2177 2178 oop backtrace() { 2179 return _backtrace(); 2180 } 2181 2182 inline void push(Method* method, int bci, TRAPS) { 2183 // Smear the -1 bci to 0 since the array only holds unsigned 2184 // shorts. The later line number lookup would just smear the -1 2185 // to a 0 even if it could be recorded. 2186 if (bci == SynchronizationEntryBCI) bci = 0; 2187 2188 if (_index >= trace_chunk_size) { 2189 methodHandle mhandle(THREAD, method); 2190 expand(CHECK); 2191 method = mhandle(); 2192 } 2193 2194 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2195 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2196 2197 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2198 // klass owning the symbols alive so their refcounts aren't decremented. 2199 Symbol* name = method->name(); 2200 _names->symbol_at_put(_index, name); 2201 2202 // We need to save the mirrors in the backtrace to keep the class 2203 // from being unloaded while we still have this stack trace. 2204 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 2205 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2206 _index++; 2207 } 2208 2209 void set_has_hidden_top_frame(TRAPS) { 2210 if (!_has_hidden_top_frame) { 2211 // It would be nice to add java/lang/Boolean::TRUE here 2212 // to indicate that this backtrace has a hidden top frame. 2213 // But this code is used before TRUE is allocated. 2214 // Therefore let's just use an arbitrary legal oop 2215 // available right here. _methods is a short[]. 2216 assert(_methods != NULL, "we need a legal oop"); 2217 _has_hidden_top_frame = true; 2218 _head->obj_at_put(trace_hidden_offset, _methods); 2219 } 2220 } 2221 }; 2222 2223 struct BacktraceElement : public StackObj { 2224 int _method_id; 2225 int _bci; 2226 int _version; 2227 Symbol* _name; 2228 Handle _mirror; 2229 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2230 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {} 2231 }; 2232 2233 class BacktraceIterator : public StackObj { 2234 int _index; 2235 objArrayHandle _result; 2236 objArrayHandle _mirrors; 2237 typeArrayHandle _methods; 2238 typeArrayHandle _bcis; 2239 typeArrayHandle _names; 2240 2241 void init(objArrayHandle result, Thread* thread) { 2242 // Get method id, bci, version and mirror from chunk 2243 _result = result; 2244 if (_result.not_null()) { 2245 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2246 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2247 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2248 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2249 _index = 0; 2250 } 2251 } 2252 public: 2253 BacktraceIterator(objArrayHandle result, Thread* thread) { 2254 init(result, thread); 2255 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2256 } 2257 2258 BacktraceElement next(Thread* thread) { 2259 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2260 _methods->ushort_at(_index), 2261 Backtrace::version_at(_bcis->int_at(_index)), 2262 Backtrace::bci_at(_bcis->int_at(_index)), 2263 _names->symbol_at(_index)); 2264 _index++; 2265 2266 if (_index >= java_lang_Throwable::trace_chunk_size) { 2267 int next_offset = java_lang_Throwable::trace_next_offset; 2268 // Get next chunk 2269 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2270 init(result, thread); 2271 } 2272 return e; 2273 } 2274 2275 bool repeat() { 2276 return _result.not_null() && _mirrors->obj_at(_index) != NULL; 2277 } 2278 }; 2279 2280 2281 // Print stack trace element to resource allocated buffer 2282 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 2283 int version, int bci, Symbol* name) { 2284 ResourceMark rm; 2285 2286 // Get strings and string lengths 2287 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2288 const char* klass_name = holder->external_name(); 2289 int buf_len = (int)strlen(klass_name); 2290 2291 char* method_name = name->as_C_string(); 2292 buf_len += (int)strlen(method_name); 2293 2294 char* source_file_name = NULL; 2295 Symbol* source = Backtrace::get_source_file_name(holder, version); 2296 if (source != NULL) { 2297 source_file_name = source->as_C_string(); 2298 buf_len += (int)strlen(source_file_name); 2299 } 2300 2301 char *module_name = NULL, *module_version = NULL; 2302 ModuleEntry* module = holder->module(); 2303 if (module->is_named()) { 2304 module_name = module->name()->as_C_string(); 2305 buf_len += (int)strlen(module_name); 2306 if (module->version() != NULL) { 2307 module_version = module->version()->as_C_string(); 2308 buf_len += (int)strlen(module_version); 2309 } 2310 } 2311 2312 // Allocate temporary buffer with extra space for formatting and line number 2313 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 2314 2315 // Print stack trace line in buffer 2316 sprintf(buf, "\tat %s.%s(", klass_name, method_name); 2317 2318 // Print module information 2319 if (module_name != NULL) { 2320 if (module_version != NULL) { 2321 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version); 2322 } else { 2323 sprintf(buf + (int)strlen(buf), "%s/", module_name); 2324 } 2325 } 2326 2327 // The method can be NULL if the requested class version is gone 2328 Method* method = holder->method_with_orig_idnum(method_id, version); 2329 if (!version_matches(method, version)) { 2330 strcat(buf, "Redefined)"); 2331 } else { 2332 int line_number = Backtrace::get_line_number(method, bci); 2333 if (line_number == -2) { 2334 strcat(buf, "Native Method)"); 2335 } else { 2336 if (source_file_name != NULL && (line_number != -1)) { 2337 // Sourcename and linenumber 2338 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number); 2339 } else if (source_file_name != NULL) { 2340 // Just sourcename 2341 sprintf(buf + (int)strlen(buf), "%s)", source_file_name); 2342 } else { 2343 // Neither sourcename nor linenumber 2344 sprintf(buf + (int)strlen(buf), "Unknown Source)"); 2345 } 2346 CompiledMethod* nm = method->code(); 2347 if (WizardMode && nm != NULL) { 2348 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 2349 } 2350 } 2351 } 2352 2353 st->print_cr("%s", buf); 2354 } 2355 2356 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) { 2357 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 2358 int method_id = method->orig_method_idnum(); 2359 int version = method->constants()->version(); 2360 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 2361 } 2362 2363 /** 2364 * Print the throwable message and its stack trace plus all causes by walking the 2365 * cause chain. The output looks the same as of Throwable.printStackTrace(). 2366 */ 2367 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 2368 // First, print the message. 2369 print(throwable(), st); 2370 st->cr(); 2371 2372 // Now print the stack trace. 2373 Thread* THREAD = Thread::current(); 2374 while (throwable.not_null()) { 2375 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 2376 if (result.is_null()) { 2377 st->print_raw_cr("\t<<no stack trace available>>"); 2378 return; 2379 } 2380 BacktraceIterator iter(result, THREAD); 2381 2382 while (iter.repeat()) { 2383 BacktraceElement bte = iter.next(THREAD); 2384 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 2385 } 2386 { 2387 // Call getCause() which doesn't necessarily return the _cause field. 2388 EXCEPTION_MARK; 2389 JavaValue cause(T_OBJECT); 2390 JavaCalls::call_virtual(&cause, 2391 throwable, 2392 throwable->klass(), 2393 vmSymbols::getCause_name(), 2394 vmSymbols::void_throwable_signature(), 2395 THREAD); 2396 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 2397 if (HAS_PENDING_EXCEPTION) { 2398 CLEAR_PENDING_EXCEPTION; 2399 throwable = Handle(); 2400 } else { 2401 throwable = Handle(THREAD, (oop) cause.get_jobject()); 2402 if (throwable.not_null()) { 2403 st->print("Caused by: "); 2404 print(throwable(), st); 2405 st->cr(); 2406 } 2407 } 2408 } 2409 } 2410 } 2411 2412 /** 2413 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 2414 */ 2415 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 2416 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected"); 2417 JavaValue result(T_VOID); 2418 JavaCalls::call_virtual(&result, 2419 throwable, 2420 SystemDictionary::Throwable_klass(), 2421 vmSymbols::printStackTrace_name(), 2422 vmSymbols::void_method_signature(), 2423 THREAD); 2424 } 2425 2426 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 2427 if (!StackTraceInThrowable) return; 2428 ResourceMark rm(THREAD); 2429 2430 // Start out by clearing the backtrace for this object, in case the VM 2431 // runs out of memory while allocating the stack trace 2432 set_backtrace(throwable(), NULL); 2433 // Clear lazily constructed Java level stacktrace if refilling occurs 2434 // This is unnecessary in 1.7+ but harmless 2435 clear_stacktrace(throwable()); 2436 2437 int max_depth = MaxJavaStackTraceDepth; 2438 JavaThread* thread = (JavaThread*)THREAD; 2439 2440 BacktraceBuilder bt(CHECK); 2441 2442 // If there is no Java frame just return the method that was being called 2443 // with bci 0 2444 if (!thread->has_last_Java_frame()) { 2445 if (max_depth >= 1 && method() != NULL) { 2446 bt.push(method(), 0, CHECK); 2447 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 2448 set_depth(throwable(), 1); 2449 set_backtrace(throwable(), bt.backtrace()); 2450 } 2451 return; 2452 } 2453 2454 // Instead of using vframe directly, this version of fill_in_stack_trace 2455 // basically handles everything by hand. This significantly improved the 2456 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 2457 // See bug 6333838 for more details. 2458 // The "ASSERT" here is to verify this method generates the exactly same stack 2459 // trace as utilizing vframe. 2460 #ifdef ASSERT 2461 vframeStream st(thread); 2462 #endif 2463 int total_count = 0; 2464 RegisterMap map(thread, false); 2465 int decode_offset = 0; 2466 CompiledMethod* nm = NULL; 2467 bool skip_fillInStackTrace_check = false; 2468 bool skip_throwableInit_check = false; 2469 bool skip_hidden = !ShowHiddenFrames; 2470 2471 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 2472 Method* method = NULL; 2473 int bci = 0; 2474 2475 // Compiled java method case. 2476 if (decode_offset != 0) { 2477 DebugInfoReadStream stream(nm, decode_offset); 2478 decode_offset = stream.read_int(); 2479 method = (Method*)nm->metadata_at(stream.read_int()); 2480 bci = stream.read_bci(); 2481 } else { 2482 if (fr.is_first_frame()) break; 2483 address pc = fr.pc(); 2484 if (fr.is_interpreted_frame()) { 2485 address bcp = fr.interpreter_frame_bcp(); 2486 method = fr.interpreter_frame_method(); 2487 bci = method->bci_from(bcp); 2488 fr = fr.sender(&map); 2489 } else { 2490 CodeBlob* cb = fr.cb(); 2491 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 2492 // but non nmethod 2493 fr = fr.sender(&map); 2494 if (cb == NULL || !cb->is_compiled()) { 2495 continue; 2496 } 2497 nm = cb->as_compiled_method(); 2498 if (nm->method()->is_native()) { 2499 method = nm->method(); 2500 bci = 0; 2501 } else { 2502 PcDesc* pd = nm->pc_desc_at(pc); 2503 decode_offset = pd->scope_decode_offset(); 2504 // if decode_offset is not equal to 0, it will execute the 2505 // "compiled java method case" at the beginning of the loop. 2506 continue; 2507 } 2508 } 2509 } 2510 #ifdef ASSERT 2511 assert(st.method() == method && st.bci() == bci, 2512 "Wrong stack trace"); 2513 st.next(); 2514 #endif 2515 2516 // the format of the stacktrace will be: 2517 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2518 // - 0 or more <init> methods for the exception class (skipped) 2519 // - rest of the stack 2520 2521 if (!skip_fillInStackTrace_check) { 2522 if (method->name() == vmSymbols::fillInStackTrace_name() && 2523 throwable->is_a(method->method_holder())) { 2524 continue; 2525 } 2526 else { 2527 skip_fillInStackTrace_check = true; // gone past them all 2528 } 2529 } 2530 if (!skip_throwableInit_check) { 2531 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2532 2533 // skip <init> methods of the exception class and superclasses 2534 // This is simlar to classic VM. 2535 if (method->name() == vmSymbols::object_initializer_name() && 2536 throwable->is_a(method->method_holder())) { 2537 continue; 2538 } else { 2539 // there are none or we've seen them all - either way stop checking 2540 skip_throwableInit_check = true; 2541 } 2542 } 2543 if (method->is_hidden()) { 2544 if (skip_hidden) { 2545 if (total_count == 0) { 2546 // The top frame will be hidden from the stack trace. 2547 bt.set_has_hidden_top_frame(CHECK); 2548 } 2549 continue; 2550 } 2551 } 2552 bt.push(method, bci, CHECK); 2553 total_count++; 2554 } 2555 2556 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2557 2558 // Put completed stack trace into throwable object 2559 set_backtrace(throwable(), bt.backtrace()); 2560 set_depth(throwable(), total_count); 2561 } 2562 2563 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2564 // No-op if stack trace is disabled 2565 if (!StackTraceInThrowable) { 2566 return; 2567 } 2568 2569 // Disable stack traces for some preallocated out of memory errors 2570 if (!Universe::should_fill_in_stack_trace(throwable)) { 2571 return; 2572 } 2573 2574 PRESERVE_EXCEPTION_MARK; 2575 2576 JavaThread* thread = JavaThread::active(); 2577 fill_in_stack_trace(throwable, method, thread); 2578 // ignore exceptions thrown during stack trace filling 2579 CLEAR_PENDING_EXCEPTION; 2580 } 2581 2582 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2583 // Allocate stack trace - backtrace is created but not filled in 2584 2585 // No-op if stack trace is disabled 2586 if (!StackTraceInThrowable) return; 2587 BacktraceBuilder bt(CHECK); // creates a backtrace 2588 set_backtrace(throwable(), bt.backtrace()); 2589 } 2590 2591 2592 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2593 // Fill in stack trace into preallocated backtrace (no GC) 2594 2595 // No-op if stack trace is disabled 2596 if (!StackTraceInThrowable) return; 2597 2598 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 2599 2600 JavaThread* THREAD = JavaThread::current(); 2601 2602 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2603 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2604 2605 ResourceMark rm(THREAD); 2606 vframeStream st(THREAD); 2607 2608 BacktraceBuilder bt(THREAD, backtrace); 2609 2610 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2611 // methods as preallocated errors aren't created by "java" code. 2612 2613 // fill in as much stack trace as possible 2614 int chunk_count = 0; 2615 for (;!st.at_end(); st.next()) { 2616 bt.push(st.method(), st.bci(), CHECK); 2617 chunk_count++; 2618 2619 // Bail-out for deep stacks 2620 if (chunk_count >= trace_chunk_size) break; 2621 } 2622 set_depth(throwable(), chunk_count); 2623 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2624 2625 // We support the Throwable immutability protocol defined for Java 7. 2626 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2627 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 2628 } 2629 2630 void java_lang_Throwable::get_stack_trace_elements(Handle throwable, 2631 objArrayHandle stack_trace_array_h, TRAPS) { 2632 2633 if (throwable.is_null() || stack_trace_array_h.is_null()) { 2634 THROW(vmSymbols::java_lang_NullPointerException()); 2635 } 2636 2637 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2638 2639 if (stack_trace_array_h->length() != depth(throwable())) { 2640 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2641 } 2642 2643 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable()))); 2644 BacktraceIterator iter(result, THREAD); 2645 2646 int index = 0; 2647 while (iter.repeat()) { 2648 BacktraceElement bte = iter.next(THREAD); 2649 2650 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2651 2652 if (stack_trace_element.is_null()) { 2653 THROW(vmSymbols::java_lang_NullPointerException()); 2654 } 2655 2656 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2657 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2658 2659 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2660 method, 2661 bte._version, 2662 bte._bci, 2663 bte._name, CHECK); 2664 } 2665 } 2666 2667 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) { 2668 Thread* THREAD = Thread::current(); 2669 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable))); 2670 BacktraceIterator iter(result, THREAD); 2671 // No backtrace available. 2672 if (!iter.repeat()) return false; 2673 2674 // If the exception happened in a frame that has been hidden, i.e., 2675 // omitted from the back trace, we can not compute the message. 2676 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset); 2677 if (hidden != NULL) { 2678 return false; 2679 } 2680 2681 // Get first backtrace element. 2682 BacktraceElement bte = iter.next(THREAD); 2683 2684 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2685 assert(holder != NULL, "first element should be non-null"); 2686 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version); 2687 2688 // Original version is no longer available. 2689 if (m == NULL || !version_matches(m, bte._version)) { 2690 return false; 2691 } 2692 2693 *method = m; 2694 *bci = bte._bci; 2695 return true; 2696 } 2697 2698 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2699 // Allocate java.lang.StackTraceElement instance 2700 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 2701 assert(k != NULL, "must be loaded in 1.4+"); 2702 if (k->should_be_initialized()) { 2703 k->initialize(CHECK_NULL); 2704 } 2705 2706 Handle element = k->allocate_instance_handle(CHECK_NULL); 2707 2708 int version = method->constants()->version(); 2709 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL); 2710 return element(); 2711 } 2712 2713 void java_lang_StackTraceElement::fill_in(Handle element, 2714 InstanceKlass* holder, const methodHandle& method, 2715 int version, int bci, Symbol* name, TRAPS) { 2716 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check"); 2717 2718 ResourceMark rm(THREAD); 2719 HandleMark hm(THREAD); 2720 2721 // Fill in class name 2722 Handle java_class(THREAD, holder->java_mirror()); 2723 oop classname = java_lang_Class::name(java_class, CHECK); 2724 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2725 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class()); 2726 2727 oop loader = holder->class_loader(); 2728 if (loader != NULL) { 2729 oop loader_name = java_lang_ClassLoader::name(loader); 2730 if (loader_name != NULL) 2731 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2732 } 2733 2734 // Fill in method name 2735 oop methodname = StringTable::intern(name, CHECK); 2736 java_lang_StackTraceElement::set_methodName(element(), methodname); 2737 2738 // Fill in module name and version 2739 ModuleEntry* module = holder->module(); 2740 if (module->is_named()) { 2741 oop module_name = StringTable::intern(module->name(), CHECK); 2742 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2743 oop module_version; 2744 if (module->version() != NULL) { 2745 module_version = StringTable::intern(module->version(), CHECK); 2746 } else { 2747 module_version = NULL; 2748 } 2749 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2750 } 2751 2752 if (method() == NULL || !version_matches(method(), version)) { 2753 // The method was redefined, accurate line number information isn't available 2754 java_lang_StackTraceElement::set_fileName(element(), NULL); 2755 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2756 } else { 2757 Symbol* source; 2758 oop source_file; 2759 int line_number; 2760 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK); 2761 2762 java_lang_StackTraceElement::set_fileName(element(), source_file); 2763 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2764 } 2765 } 2766 2767 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class, 2768 InstanceKlass* holder, 2769 int version, 2770 const methodHandle& method, 2771 int bci, 2772 Symbol*& source, 2773 oop& source_file, 2774 int& line_number, TRAPS) { 2775 // Fill in source file name and line number. 2776 source = Backtrace::get_source_file_name(holder, version); 2777 source_file = java_lang_Class::source_file(java_class()); 2778 if (source != NULL) { 2779 // Class was not redefined. We can trust its cache if set, 2780 // else we have to initialize it. 2781 if (source_file == NULL) { 2782 source_file = StringTable::intern(source, CHECK); 2783 java_lang_Class::set_source_file(java_class(), source_file); 2784 } 2785 } else { 2786 // Class was redefined. Dump the cache if it was set. 2787 if (source_file != NULL) { 2788 source_file = NULL; 2789 java_lang_Class::set_source_file(java_class(), source_file); 2790 } 2791 } 2792 line_number = Backtrace::get_line_number(method(), bci); 2793 } 2794 2795 #if INCLUDE_JVMCI 2796 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci, 2797 Symbol*& filename, int& line_number, TRAPS) { 2798 ResourceMark rm(THREAD); 2799 HandleMark hm(THREAD); 2800 2801 filename = NULL; 2802 line_number = -1; 2803 2804 oop source_file; 2805 int version = method->constants()->version(); 2806 InstanceKlass* holder = method->method_holder(); 2807 Handle java_class(THREAD, holder->java_mirror()); 2808 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK); 2809 } 2810 #endif // INCLUDE_JVMCI 2811 2812 // java_lang_StackFrameInfo 2813 2814 int java_lang_StackFrameInfo::_memberName_offset; 2815 int java_lang_StackFrameInfo::_bci_offset; 2816 int java_lang_StackFrameInfo::_version_offset; 2817 2818 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 2819 macro(_memberName_offset, k, "memberName", object_signature, false); \ 2820 macro(_bci_offset, k, "bci", int_signature, false) 2821 2822 void java_lang_StackFrameInfo::compute_offsets() { 2823 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass(); 2824 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2825 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2826 } 2827 2828 #if INCLUDE_CDS 2829 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) { 2830 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2831 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 2832 } 2833 #endif 2834 2835 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 2836 HandleMark hm(THREAD); 2837 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 2838 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 2839 // we should expand MemberName::name when Throwable uses StackTrace 2840 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 2841 return method; 2842 } 2843 2844 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) { 2845 // set Method* or mid/cpref 2846 HandleMark hm(THREAD); 2847 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset)); 2848 InstanceKlass* ik = method->method_holder(); 2849 CallInfo info(method(), ik, CHECK); 2850 MethodHandles::init_method_MemberName(mname, info); 2851 // set bci 2852 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 2853 // method may be redefined; store the version 2854 int version = method->constants()->version(); 2855 assert((jushort)version == version, "version should be short"); 2856 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 2857 } 2858 2859 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 2860 ResourceMark rm(THREAD); 2861 HandleMark hm(THREAD); 2862 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset)); 2863 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname())); 2864 InstanceKlass* holder = InstanceKlass::cast(clazz); 2865 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 2866 2867 short version = stackFrame->short_field(_version_offset); 2868 int bci = stackFrame->int_field(_bci_offset); 2869 Symbol* name = method->name(); 2870 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), 2871 version, bci, name, CHECK); 2872 } 2873 2874 void java_lang_StackFrameInfo::set_version(oop element, short value) { 2875 element->short_field_put(_version_offset, value); 2876 } 2877 2878 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 2879 assert(value >= 0 && value < max_jushort, "must be a valid bci value"); 2880 element->int_field_put(_bci_offset, value); 2881 } 2882 2883 int java_lang_LiveStackFrameInfo::_monitors_offset; 2884 int java_lang_LiveStackFrameInfo::_locals_offset; 2885 int java_lang_LiveStackFrameInfo::_operands_offset; 2886 int java_lang_LiveStackFrameInfo::_mode_offset; 2887 2888 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 2889 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 2890 macro(_locals_offset, k, "locals", object_array_signature, false); \ 2891 macro(_operands_offset, k, "operands", object_array_signature, false); \ 2892 macro(_mode_offset, k, "mode", int_signature, false) 2893 2894 void java_lang_LiveStackFrameInfo::compute_offsets() { 2895 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass(); 2896 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2897 } 2898 2899 #if INCLUDE_CDS 2900 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) { 2901 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2902 } 2903 #endif 2904 2905 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 2906 element->obj_field_put(_monitors_offset, value); 2907 } 2908 2909 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 2910 element->obj_field_put(_locals_offset, value); 2911 } 2912 2913 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 2914 element->obj_field_put(_operands_offset, value); 2915 } 2916 2917 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) { 2918 element->int_field_put(_mode_offset, value); 2919 } 2920 2921 2922 // java_lang_AccessibleObject 2923 2924 int java_lang_reflect_AccessibleObject::_override_offset; 2925 2926 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 2927 macro(_override_offset, k, "override", bool_signature, false) 2928 2929 void java_lang_reflect_AccessibleObject::compute_offsets() { 2930 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass(); 2931 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2932 } 2933 2934 #if INCLUDE_CDS 2935 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) { 2936 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2937 } 2938 #endif 2939 2940 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 2941 return (jboolean) reflect->bool_field(_override_offset); 2942 } 2943 2944 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 2945 reflect->bool_field_put(_override_offset, (int) value); 2946 } 2947 2948 // java_lang_reflect_Method 2949 2950 int java_lang_reflect_Method::_clazz_offset; 2951 int java_lang_reflect_Method::_name_offset; 2952 int java_lang_reflect_Method::_returnType_offset; 2953 int java_lang_reflect_Method::_parameterTypes_offset; 2954 int java_lang_reflect_Method::_exceptionTypes_offset; 2955 int java_lang_reflect_Method::_slot_offset; 2956 int java_lang_reflect_Method::_modifiers_offset; 2957 int java_lang_reflect_Method::_signature_offset; 2958 int java_lang_reflect_Method::_annotations_offset; 2959 int java_lang_reflect_Method::_parameter_annotations_offset; 2960 int java_lang_reflect_Method::_annotation_default_offset; 2961 2962 #define METHOD_FIELDS_DO(macro) \ 2963 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2964 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2965 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 2966 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2967 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2968 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2969 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2970 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 2971 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 2972 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \ 2973 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false); 2974 2975 void java_lang_reflect_Method::compute_offsets() { 2976 InstanceKlass* k = SystemDictionary::reflect_Method_klass(); 2977 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2978 } 2979 2980 #if INCLUDE_CDS 2981 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) { 2982 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2983 } 2984 #endif 2985 2986 Handle java_lang_reflect_Method::create(TRAPS) { 2987 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2988 Klass* klass = SystemDictionary::reflect_Method_klass(); 2989 // This class is eagerly initialized during VM initialization, since we keep a refence 2990 // to one of the methods 2991 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2992 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2993 } 2994 2995 oop java_lang_reflect_Method::clazz(oop reflect) { 2996 return reflect->obj_field(_clazz_offset); 2997 } 2998 2999 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 3000 reflect->obj_field_put(_clazz_offset, value); 3001 } 3002 3003 int java_lang_reflect_Method::slot(oop reflect) { 3004 return reflect->int_field(_slot_offset); 3005 } 3006 3007 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 3008 reflect->int_field_put(_slot_offset, value); 3009 } 3010 3011 void java_lang_reflect_Method::set_name(oop method, oop value) { 3012 method->obj_field_put(_name_offset, value); 3013 } 3014 3015 oop java_lang_reflect_Method::return_type(oop method) { 3016 return method->obj_field(_returnType_offset); 3017 } 3018 3019 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 3020 method->obj_field_put(_returnType_offset, value); 3021 } 3022 3023 oop java_lang_reflect_Method::parameter_types(oop method) { 3024 return method->obj_field(_parameterTypes_offset); 3025 } 3026 3027 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 3028 method->obj_field_put(_parameterTypes_offset, value); 3029 } 3030 3031 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 3032 method->obj_field_put(_exceptionTypes_offset, value); 3033 } 3034 3035 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 3036 method->int_field_put(_modifiers_offset, value); 3037 } 3038 3039 void java_lang_reflect_Method::set_signature(oop method, oop value) { 3040 method->obj_field_put(_signature_offset, value); 3041 } 3042 3043 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 3044 method->obj_field_put(_annotations_offset, value); 3045 } 3046 3047 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 3048 method->obj_field_put(_parameter_annotations_offset, value); 3049 } 3050 3051 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 3052 method->obj_field_put(_annotation_default_offset, value); 3053 } 3054 3055 int java_lang_reflect_Constructor::_clazz_offset; 3056 int java_lang_reflect_Constructor::_parameterTypes_offset; 3057 int java_lang_reflect_Constructor::_exceptionTypes_offset; 3058 int java_lang_reflect_Constructor::_slot_offset; 3059 int java_lang_reflect_Constructor::_modifiers_offset; 3060 int java_lang_reflect_Constructor::_signature_offset; 3061 int java_lang_reflect_Constructor::_annotations_offset; 3062 int java_lang_reflect_Constructor::_parameter_annotations_offset; 3063 3064 #define CONSTRUCTOR_FIELDS_DO(macro) \ 3065 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3066 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 3067 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 3068 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3069 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3070 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3071 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 3072 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); 3073 3074 void java_lang_reflect_Constructor::compute_offsets() { 3075 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass(); 3076 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3077 } 3078 3079 #if INCLUDE_CDS 3080 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) { 3081 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3082 } 3083 #endif 3084 3085 Handle java_lang_reflect_Constructor::create(TRAPS) { 3086 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3087 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 3088 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3089 InstanceKlass* ik = InstanceKlass::cast(k); 3090 // Ensure it is initialized 3091 ik->initialize(CHECK_NH); 3092 return ik->allocate_instance_handle(THREAD); 3093 } 3094 3095 oop java_lang_reflect_Constructor::clazz(oop reflect) { 3096 return reflect->obj_field(_clazz_offset); 3097 } 3098 3099 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 3100 reflect->obj_field_put(_clazz_offset, value); 3101 } 3102 3103 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 3104 return constructor->obj_field(_parameterTypes_offset); 3105 } 3106 3107 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 3108 constructor->obj_field_put(_parameterTypes_offset, value); 3109 } 3110 3111 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 3112 constructor->obj_field_put(_exceptionTypes_offset, value); 3113 } 3114 3115 int java_lang_reflect_Constructor::slot(oop reflect) { 3116 return reflect->int_field(_slot_offset); 3117 } 3118 3119 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 3120 reflect->int_field_put(_slot_offset, value); 3121 } 3122 3123 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 3124 constructor->int_field_put(_modifiers_offset, value); 3125 } 3126 3127 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 3128 constructor->obj_field_put(_signature_offset, value); 3129 } 3130 3131 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 3132 constructor->obj_field_put(_annotations_offset, value); 3133 } 3134 3135 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 3136 method->obj_field_put(_parameter_annotations_offset, value); 3137 } 3138 3139 int java_lang_reflect_Field::_clazz_offset; 3140 int java_lang_reflect_Field::_name_offset; 3141 int java_lang_reflect_Field::_type_offset; 3142 int java_lang_reflect_Field::_slot_offset; 3143 int java_lang_reflect_Field::_modifiers_offset; 3144 int java_lang_reflect_Field::_trusted_final_offset; 3145 int java_lang_reflect_Field::_signature_offset; 3146 int java_lang_reflect_Field::_annotations_offset; 3147 3148 #define FIELD_FIELDS_DO(macro) \ 3149 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3150 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3151 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \ 3152 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3153 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3154 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \ 3155 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3156 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); 3157 3158 void java_lang_reflect_Field::compute_offsets() { 3159 InstanceKlass* k = SystemDictionary::reflect_Field_klass(); 3160 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3161 } 3162 3163 #if INCLUDE_CDS 3164 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) { 3165 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3166 } 3167 #endif 3168 3169 Handle java_lang_reflect_Field::create(TRAPS) { 3170 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3171 Symbol* name = vmSymbols::java_lang_reflect_Field(); 3172 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3173 InstanceKlass* ik = InstanceKlass::cast(k); 3174 // Ensure it is initialized 3175 ik->initialize(CHECK_NH); 3176 return ik->allocate_instance_handle(THREAD); 3177 } 3178 3179 oop java_lang_reflect_Field::clazz(oop reflect) { 3180 return reflect->obj_field(_clazz_offset); 3181 } 3182 3183 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 3184 reflect->obj_field_put(_clazz_offset, value); 3185 } 3186 3187 oop java_lang_reflect_Field::name(oop field) { 3188 return field->obj_field(_name_offset); 3189 } 3190 3191 void java_lang_reflect_Field::set_name(oop field, oop value) { 3192 field->obj_field_put(_name_offset, value); 3193 } 3194 3195 oop java_lang_reflect_Field::type(oop field) { 3196 return field->obj_field(_type_offset); 3197 } 3198 3199 void java_lang_reflect_Field::set_type(oop field, oop value) { 3200 field->obj_field_put(_type_offset, value); 3201 } 3202 3203 int java_lang_reflect_Field::slot(oop reflect) { 3204 return reflect->int_field(_slot_offset); 3205 } 3206 3207 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 3208 reflect->int_field_put(_slot_offset, value); 3209 } 3210 3211 int java_lang_reflect_Field::modifiers(oop field) { 3212 return field->int_field(_modifiers_offset); 3213 } 3214 3215 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 3216 field->int_field_put(_modifiers_offset, value); 3217 } 3218 3219 void java_lang_reflect_Field::set_trusted_final(oop field) { 3220 field->bool_field_put(_trusted_final_offset, true); 3221 } 3222 3223 void java_lang_reflect_Field::set_signature(oop field, oop value) { 3224 field->obj_field_put(_signature_offset, value); 3225 } 3226 3227 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 3228 field->obj_field_put(_annotations_offset, value); 3229 } 3230 3231 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) { 3232 // Allocate java.lang.reflect.RecordComponent instance 3233 HandleMark hm(THREAD); 3234 InstanceKlass* ik = SystemDictionary::RecordComponent_klass(); 3235 assert(ik != NULL, "must be loaded"); 3236 ik->initialize(CHECK_NULL); 3237 3238 Handle element = ik->allocate_instance_handle(CHECK_NULL); 3239 3240 Handle decl_class(THREAD, holder->java_mirror()); 3241 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class()); 3242 3243 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8 3244 oop component_name = StringTable::intern(name, CHECK_NULL); 3245 java_lang_reflect_RecordComponent::set_name(element(), component_name); 3246 3247 Symbol* type = holder->constants()->symbol_at(component->descriptor_index()); 3248 Handle component_type_h = 3249 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL); 3250 java_lang_reflect_RecordComponent::set_type(element(), component_type_h()); 3251 3252 Method* accessor_method = NULL; 3253 { 3254 // Prepend "()" to type to create the full method signature. 3255 ResourceMark rm(THREAD); 3256 int sig_len = type->utf8_length() + 3; // "()" and null char 3257 char* sig = NEW_RESOURCE_ARRAY(char, sig_len); 3258 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string()); 3259 TempNewSymbol full_sig = SymbolTable::new_symbol(sig); 3260 accessor_method = holder->find_instance_method(name, full_sig, Klass::find_private); 3261 } 3262 3263 if (accessor_method != NULL) { 3264 methodHandle method(THREAD, accessor_method); 3265 oop m = Reflection::new_method(method, false, CHECK_NULL); 3266 java_lang_reflect_RecordComponent::set_accessor(element(), m); 3267 } else { 3268 java_lang_reflect_RecordComponent::set_accessor(element(), NULL); 3269 } 3270 3271 int sig_index = component->generic_signature_index(); 3272 if (sig_index > 0) { 3273 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8 3274 oop component_sig = StringTable::intern(sig, CHECK_NULL); 3275 java_lang_reflect_RecordComponent::set_signature(element(), component_sig); 3276 } else { 3277 java_lang_reflect_RecordComponent::set_signature(element(), NULL); 3278 } 3279 3280 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL); 3281 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop); 3282 3283 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL); 3284 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop); 3285 3286 return element(); 3287 } 3288 3289 int reflect_ConstantPool::_oop_offset; 3290 3291 #define CONSTANTPOOL_FIELDS_DO(macro) \ 3292 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 3293 3294 void reflect_ConstantPool::compute_offsets() { 3295 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3296 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3297 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3298 } 3299 3300 #if INCLUDE_CDS 3301 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) { 3302 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3303 } 3304 #endif 3305 3306 int java_lang_reflect_Parameter::_name_offset; 3307 int java_lang_reflect_Parameter::_modifiers_offset; 3308 int java_lang_reflect_Parameter::_index_offset; 3309 int java_lang_reflect_Parameter::_executable_offset; 3310 3311 #define PARAMETER_FIELDS_DO(macro) \ 3312 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3313 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3314 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3315 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3316 3317 void java_lang_reflect_Parameter::compute_offsets() { 3318 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass(); 3319 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3320 } 3321 3322 #if INCLUDE_CDS 3323 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) { 3324 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3325 } 3326 #endif 3327 3328 Handle java_lang_reflect_Parameter::create(TRAPS) { 3329 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3330 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3331 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3332 InstanceKlass* ik = InstanceKlass::cast(k); 3333 // Ensure it is initialized 3334 ik->initialize(CHECK_NH); 3335 return ik->allocate_instance_handle(THREAD); 3336 } 3337 3338 oop java_lang_reflect_Parameter::name(oop param) { 3339 return param->obj_field(_name_offset); 3340 } 3341 3342 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3343 param->obj_field_put(_name_offset, value); 3344 } 3345 3346 int java_lang_reflect_Parameter::modifiers(oop param) { 3347 return param->int_field(_modifiers_offset); 3348 } 3349 3350 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3351 param->int_field_put(_modifiers_offset, value); 3352 } 3353 3354 int java_lang_reflect_Parameter::index(oop param) { 3355 return param->int_field(_index_offset); 3356 } 3357 3358 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3359 param->int_field_put(_index_offset, value); 3360 } 3361 3362 oop java_lang_reflect_Parameter::executable(oop param) { 3363 return param->obj_field(_executable_offset); 3364 } 3365 3366 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3367 param->obj_field_put(_executable_offset, value); 3368 } 3369 3370 // java_lang_Module 3371 3372 int java_lang_Module::_loader_offset; 3373 int java_lang_Module::_name_offset; 3374 int java_lang_Module::_module_entry_offset; 3375 3376 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3377 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3378 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(), 3379 vmSymbols::java_lang_module_init_signature(), 3380 loader, module_name, CHECK_NH); 3381 } 3382 3383 #define MODULE_FIELDS_DO(macro) \ 3384 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3385 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false) 3386 3387 void java_lang_Module::compute_offsets() { 3388 InstanceKlass* k = SystemDictionary::Module_klass(); 3389 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3390 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3391 } 3392 3393 #if INCLUDE_CDS 3394 void java_lang_Module::serialize_offsets(SerializeClosure* f) { 3395 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3396 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3397 } 3398 #endif 3399 3400 oop java_lang_Module::loader(oop module) { 3401 return module->obj_field(_loader_offset); 3402 } 3403 3404 void java_lang_Module::set_loader(oop module, oop value) { 3405 module->obj_field_put(_loader_offset, value); 3406 } 3407 3408 oop java_lang_Module::name(oop module) { 3409 return module->obj_field(_name_offset); 3410 } 3411 3412 void java_lang_Module::set_name(oop module, oop value) { 3413 module->obj_field_put(_name_offset, value); 3414 } 3415 3416 ModuleEntry* java_lang_Module::module_entry(oop module) { 3417 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 3418 assert(module != NULL, "module can't be null"); 3419 assert(oopDesc::is_oop(module), "module must be oop"); 3420 3421 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3422 if (module_entry == NULL) { 3423 // If the inject field containing the ModuleEntry* is null then return the 3424 // class loader's unnamed module. 3425 oop loader = java_lang_Module::loader(module); 3426 Handle h_loader = Handle(Thread::current(), loader); 3427 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3428 return loader_cld->unnamed_module(); 3429 } 3430 return module_entry; 3431 } 3432 3433 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3434 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 3435 assert(module != NULL, "module can't be null"); 3436 assert(oopDesc::is_oop(module), "module must be oop"); 3437 module->address_field_put(_module_entry_offset, (address)module_entry); 3438 } 3439 3440 Handle reflect_ConstantPool::create(TRAPS) { 3441 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3442 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3443 // Ensure it is initialized 3444 k->initialize(CHECK_NH); 3445 return k->allocate_instance_handle(THREAD); 3446 } 3447 3448 3449 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3450 oop mirror = value->pool_holder()->java_mirror(); 3451 // Save the mirror to get back the constant pool. 3452 reflect->obj_field_put(_oop_offset, mirror); 3453 } 3454 3455 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3456 3457 oop mirror = reflect->obj_field(_oop_offset); 3458 Klass* k = java_lang_Class::as_Klass(mirror); 3459 assert(k->is_instance_klass(), "Must be"); 3460 3461 // Get the constant pool back from the klass. Since class redefinition 3462 // merges the new constant pool into the old, this is essentially the 3463 // same constant pool as the original. If constant pool merging is 3464 // no longer done in the future, this will have to change to save 3465 // the original. 3466 return InstanceKlass::cast(k)->constants(); 3467 } 3468 3469 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 3470 3471 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \ 3472 macro(_base_offset, k, "base", object_signature, false) 3473 3474 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 3475 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 3476 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3477 } 3478 3479 #if INCLUDE_CDS 3480 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) { 3481 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3482 } 3483 #endif 3484 3485 // Support for java_lang_ref_Reference 3486 3487 bool java_lang_ref_Reference::_offsets_initialized; 3488 3489 int java_lang_ref_Reference::_referent_offset; 3490 int java_lang_ref_Reference::_queue_offset; 3491 int java_lang_ref_Reference::_next_offset; 3492 int java_lang_ref_Reference::_discovered_offset; 3493 3494 #define REFERENCE_FIELDS_DO(macro) \ 3495 macro(_referent_offset, k, "referent", object_signature, false); \ 3496 macro(_queue_offset, k, "queue", referencequeue_signature, false); \ 3497 macro(_next_offset, k, "next", reference_signature, false); \ 3498 macro(_discovered_offset, k, "discovered", reference_signature, false); 3499 3500 void java_lang_ref_Reference::compute_offsets() { 3501 if (_offsets_initialized) { 3502 return; 3503 } 3504 _offsets_initialized = true; 3505 InstanceKlass* k = SystemDictionary::Reference_klass(); 3506 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3507 } 3508 3509 #if INCLUDE_CDS 3510 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) { 3511 f->do_bool(&_offsets_initialized); 3512 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3513 } 3514 #endif 3515 3516 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3517 assert(obj != NULL, "sanity"); 3518 if (offset != _referent_offset) { 3519 return false; 3520 } 3521 3522 Klass* k = obj->klass(); 3523 if (!k->is_instance_klass()) { 3524 return false; 3525 } 3526 3527 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3528 bool is_reference = ik->reference_type() != REF_NONE; 3529 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); 3530 return is_reference; 3531 } 3532 3533 int java_lang_boxing_object::_value_offset; 3534 int java_lang_boxing_object::_long_value_offset; 3535 3536 #define BOXING_FIELDS_DO(macro) \ 3537 macro(_value_offset, integerKlass, "value", int_signature, false); \ 3538 macro(_long_value_offset, longKlass, "value", long_signature, false); 3539 3540 void java_lang_boxing_object::compute_offsets() { 3541 InstanceKlass* integerKlass = SystemDictionary::Integer_klass(); 3542 InstanceKlass* longKlass = SystemDictionary::Long_klass(); 3543 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3544 } 3545 3546 #if INCLUDE_CDS 3547 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) { 3548 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3549 } 3550 #endif 3551 3552 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 3553 Klass* k = SystemDictionary::box_klass(type); 3554 if (k == NULL) return NULL; 3555 InstanceKlass* ik = InstanceKlass::cast(k); 3556 if (!ik->is_initialized()) ik->initialize(CHECK_NULL); 3557 return ik->allocate_instance(THREAD); 3558 } 3559 3560 3561 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 3562 oop box = initialize_and_allocate(type, CHECK_NULL); 3563 if (box == NULL) return NULL; 3564 switch (type) { 3565 case T_BOOLEAN: 3566 box->bool_field_put(_value_offset, value->z); 3567 break; 3568 case T_CHAR: 3569 box->char_field_put(_value_offset, value->c); 3570 break; 3571 case T_FLOAT: 3572 box->float_field_put(_value_offset, value->f); 3573 break; 3574 case T_DOUBLE: 3575 box->double_field_put(_long_value_offset, value->d); 3576 break; 3577 case T_BYTE: 3578 box->byte_field_put(_value_offset, value->b); 3579 break; 3580 case T_SHORT: 3581 box->short_field_put(_value_offset, value->s); 3582 break; 3583 case T_INT: 3584 box->int_field_put(_value_offset, value->i); 3585 break; 3586 case T_LONG: 3587 box->long_field_put(_long_value_offset, value->j); 3588 break; 3589 default: 3590 return NULL; 3591 } 3592 return box; 3593 } 3594 3595 3596 BasicType java_lang_boxing_object::basic_type(oop box) { 3597 if (box == NULL) return T_ILLEGAL; 3598 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3599 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 3600 return T_ILLEGAL; 3601 return type; 3602 } 3603 3604 3605 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 3606 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3607 switch (type) { 3608 case T_BOOLEAN: 3609 value->z = box->bool_field(_value_offset); 3610 break; 3611 case T_CHAR: 3612 value->c = box->char_field(_value_offset); 3613 break; 3614 case T_FLOAT: 3615 value->f = box->float_field(_value_offset); 3616 break; 3617 case T_DOUBLE: 3618 value->d = box->double_field(_long_value_offset); 3619 break; 3620 case T_BYTE: 3621 value->b = box->byte_field(_value_offset); 3622 break; 3623 case T_SHORT: 3624 value->s = box->short_field(_value_offset); 3625 break; 3626 case T_INT: 3627 value->i = box->int_field(_value_offset); 3628 break; 3629 case T_LONG: 3630 value->j = box->long_field(_long_value_offset); 3631 break; 3632 default: 3633 return T_ILLEGAL; 3634 } // end switch 3635 return type; 3636 } 3637 3638 3639 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3640 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3641 switch (type) { 3642 case T_BOOLEAN: 3643 box->bool_field_put(_value_offset, value->z); 3644 break; 3645 case T_CHAR: 3646 box->char_field_put(_value_offset, value->c); 3647 break; 3648 case T_FLOAT: 3649 box->float_field_put(_value_offset, value->f); 3650 break; 3651 case T_DOUBLE: 3652 box->double_field_put(_long_value_offset, value->d); 3653 break; 3654 case T_BYTE: 3655 box->byte_field_put(_value_offset, value->b); 3656 break; 3657 case T_SHORT: 3658 box->short_field_put(_value_offset, value->s); 3659 break; 3660 case T_INT: 3661 box->int_field_put(_value_offset, value->i); 3662 break; 3663 case T_LONG: 3664 box->long_field_put(_long_value_offset, value->j); 3665 break; 3666 default: 3667 return T_ILLEGAL; 3668 } // end switch 3669 return type; 3670 } 3671 3672 3673 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3674 switch (type) { 3675 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3676 case T_CHAR: st->print("%d", value->c); break; 3677 case T_BYTE: st->print("%d", value->b); break; 3678 case T_SHORT: st->print("%d", value->s); break; 3679 case T_INT: st->print("%d", value->i); break; 3680 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 3681 case T_FLOAT: st->print("%f", value->f); break; 3682 case T_DOUBLE: st->print("%lf", value->d); break; 3683 default: st->print("type %d?", type); break; 3684 } 3685 } 3686 3687 3688 // Support for java_lang_ref_SoftReference 3689 // 3690 3691 int java_lang_ref_SoftReference::_timestamp_offset; 3692 int java_lang_ref_SoftReference::_static_clock_offset; 3693 3694 #define SOFTREFERENCE_FIELDS_DO(macro) \ 3695 macro(_timestamp_offset, k, "timestamp", long_signature, false); \ 3696 macro(_static_clock_offset, k, "clock", long_signature, true) 3697 3698 void java_lang_ref_SoftReference::compute_offsets() { 3699 InstanceKlass* k = SystemDictionary::SoftReference_klass(); 3700 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3701 } 3702 3703 #if INCLUDE_CDS 3704 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) { 3705 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3706 } 3707 #endif 3708 3709 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3710 return ref->long_field(_timestamp_offset); 3711 } 3712 3713 jlong java_lang_ref_SoftReference::clock() { 3714 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3715 oop base = ik->static_field_base_raw(); 3716 return base->long_field(_static_clock_offset); 3717 } 3718 3719 void java_lang_ref_SoftReference::set_clock(jlong value) { 3720 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3721 oop base = ik->static_field_base_raw(); 3722 base->long_field_put(_static_clock_offset, value); 3723 } 3724 3725 // Support for java_lang_invoke_DirectMethodHandle 3726 3727 int java_lang_invoke_DirectMethodHandle::_member_offset; 3728 3729 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3730 oop member_name = NULL; 3731 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 3732 "a DirectMethodHandle oop is expected"); 3733 return dmh->obj_field(_member_offset); 3734 } 3735 3736 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 3737 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 3738 3739 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3740 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass(); 3741 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3742 } 3743 3744 #if INCLUDE_CDS 3745 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) { 3746 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3747 } 3748 #endif 3749 3750 // Support for java_lang_invoke_MethodHandle 3751 3752 int java_lang_invoke_MethodHandle::_type_offset; 3753 int java_lang_invoke_MethodHandle::_form_offset; 3754 3755 int java_lang_invoke_MemberName::_clazz_offset; 3756 int java_lang_invoke_MemberName::_name_offset; 3757 int java_lang_invoke_MemberName::_type_offset; 3758 int java_lang_invoke_MemberName::_flags_offset; 3759 int java_lang_invoke_MemberName::_method_offset; 3760 int java_lang_invoke_MemberName::_vmindex_offset; 3761 3762 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 3763 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 3764 3765 int java_lang_invoke_LambdaForm::_vmentry_offset; 3766 3767 #define METHODHANDLE_FIELDS_DO(macro) \ 3768 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 3769 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 3770 3771 void java_lang_invoke_MethodHandle::compute_offsets() { 3772 InstanceKlass* k = SystemDictionary::MethodHandle_klass(); 3773 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3774 } 3775 3776 #if INCLUDE_CDS 3777 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) { 3778 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3779 } 3780 #endif 3781 3782 #define MEMBERNAME_FIELDS_DO(macro) \ 3783 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3784 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3785 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 3786 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 3787 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 3788 3789 void java_lang_invoke_MemberName::compute_offsets() { 3790 InstanceKlass* k = SystemDictionary::MemberName_klass(); 3791 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3792 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3793 } 3794 3795 #if INCLUDE_CDS 3796 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) { 3797 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3798 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3799 } 3800 #endif 3801 3802 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 3803 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3804 assert(k != NULL, "jdk mismatch"); 3805 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3806 } 3807 3808 #if INCLUDE_CDS 3809 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) { 3810 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3811 } 3812 #endif 3813 3814 #define LAMBDAFORM_FIELDS_DO(macro) \ 3815 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 3816 3817 void java_lang_invoke_LambdaForm::compute_offsets() { 3818 InstanceKlass* k = SystemDictionary::LambdaForm_klass(); 3819 assert (k != NULL, "jdk mismatch"); 3820 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3821 } 3822 3823 #if INCLUDE_CDS 3824 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) { 3825 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3826 } 3827 #endif 3828 3829 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 3830 return obj != NULL && is_subclass(obj->klass()); 3831 } 3832 3833 3834 oop java_lang_invoke_MethodHandle::type(oop mh) { 3835 return mh->obj_field(_type_offset); 3836 } 3837 3838 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 3839 mh->obj_field_put(_type_offset, mtype); 3840 } 3841 3842 oop java_lang_invoke_MethodHandle::form(oop mh) { 3843 assert(_form_offset != 0, ""); 3844 return mh->obj_field(_form_offset); 3845 } 3846 3847 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 3848 assert(_form_offset != 0, ""); 3849 mh->obj_field_put(_form_offset, lform); 3850 } 3851 3852 /// MemberName accessors 3853 3854 oop java_lang_invoke_MemberName::clazz(oop mname) { 3855 assert(is_instance(mname), "wrong type"); 3856 return mname->obj_field(_clazz_offset); 3857 } 3858 3859 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 3860 assert(is_instance(mname), "wrong type"); 3861 mname->obj_field_put(_clazz_offset, clazz); 3862 } 3863 3864 oop java_lang_invoke_MemberName::name(oop mname) { 3865 assert(is_instance(mname), "wrong type"); 3866 return mname->obj_field(_name_offset); 3867 } 3868 3869 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 3870 assert(is_instance(mname), "wrong type"); 3871 mname->obj_field_put(_name_offset, name); 3872 } 3873 3874 oop java_lang_invoke_MemberName::type(oop mname) { 3875 assert(is_instance(mname), "wrong type"); 3876 return mname->obj_field(_type_offset); 3877 } 3878 3879 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 3880 assert(is_instance(mname), "wrong type"); 3881 mname->obj_field_put(_type_offset, type); 3882 } 3883 3884 int java_lang_invoke_MemberName::flags(oop mname) { 3885 assert(is_instance(mname), "wrong type"); 3886 return mname->int_field(_flags_offset); 3887 } 3888 3889 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 3890 assert(is_instance(mname), "wrong type"); 3891 mname->int_field_put(_flags_offset, flags); 3892 } 3893 3894 3895 // Return vmtarget from ResolvedMethodName method field through indirection 3896 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 3897 assert(is_instance(mname), "wrong type"); 3898 oop method = mname->obj_field(_method_offset); 3899 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method); 3900 } 3901 3902 bool java_lang_invoke_MemberName::is_method(oop mname) { 3903 assert(is_instance(mname), "must be MemberName"); 3904 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 3905 } 3906 3907 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 3908 assert(is_instance(mname), "wrong type"); 3909 mname->obj_field_put(_method_offset, resolved_method); 3910 } 3911 3912 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 3913 assert(is_instance(mname), "wrong type"); 3914 return (intptr_t) mname->address_field(_vmindex_offset); 3915 } 3916 3917 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 3918 assert(is_instance(mname), "wrong type"); 3919 mname->address_field_put(_vmindex_offset, (address) index); 3920 } 3921 3922 3923 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 3924 assert(is_instance(resolved_method), "wrong type"); 3925 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 3926 assert(m->is_method(), "must be"); 3927 return m; 3928 } 3929 3930 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 3931 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 3932 assert(is_instance(resolved_method), "wrong type"); 3933 resolved_method->address_field_put(_vmtarget_offset, (address)m); 3934 } 3935 3936 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) { 3937 assert(is_instance(resolved_method), "wrong type"); 3938 resolved_method->obj_field_put(_vmholder_offset, holder); 3939 } 3940 3941 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 3942 const Method* method = m(); 3943 3944 // lookup ResolvedMethod oop in the table, or create a new one and intern it 3945 oop resolved_method = ResolvedMethodTable::find_method(method); 3946 if (resolved_method != NULL) { 3947 return resolved_method; 3948 } 3949 3950 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3951 if (!k->is_initialized()) { 3952 k->initialize(CHECK_NULL); 3953 } 3954 3955 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 3956 3957 NoSafepointVerifier nsv; 3958 3959 if (method->is_old()) { 3960 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() : 3961 method->get_new_method(); 3962 } 3963 3964 InstanceKlass* holder = method->method_holder(); 3965 3966 set_vmtarget(new_resolved_method, const_cast<Method*>(method)); 3967 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have 3968 // distinct loaders) to ensure the metadata is kept alive. 3969 // This mirror may be different than the one in clazz field. 3970 set_vmholder(new_resolved_method, holder->java_mirror()); 3971 3972 // Set flag in class to indicate this InstanceKlass has entries in the table 3973 // to avoid walking table during redefinition if none of the redefined classes 3974 // have any membernames in the table. 3975 holder->set_has_resolved_methods(); 3976 3977 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method)); 3978 } 3979 3980 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 3981 assert(is_instance(lform), "wrong type"); 3982 return lform->obj_field(_vmentry_offset); 3983 } 3984 3985 3986 // Support for java_lang_invoke_MethodType 3987 3988 int java_lang_invoke_MethodType::_rtype_offset; 3989 int java_lang_invoke_MethodType::_ptypes_offset; 3990 3991 #define METHODTYPE_FIELDS_DO(macro) \ 3992 macro(_rtype_offset, k, "rtype", class_signature, false); \ 3993 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 3994 3995 void java_lang_invoke_MethodType::compute_offsets() { 3996 InstanceKlass* k = SystemDictionary::MethodType_klass(); 3997 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3998 } 3999 4000 #if INCLUDE_CDS 4001 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) { 4002 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4003 } 4004 #endif 4005 4006 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 4007 st->print("("); 4008 objArrayOop pts = ptypes(mt); 4009 for (int i = 0, limit = pts->length(); i < limit; i++) { 4010 java_lang_Class::print_signature(pts->obj_at(i), st); 4011 } 4012 st->print(")"); 4013 java_lang_Class::print_signature(rtype(mt), st); 4014 } 4015 4016 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) { 4017 ResourceMark rm; 4018 stringStream buffer(128); 4019 print_signature(mt, &buffer); 4020 const char* sigstr = buffer.base(); 4021 int siglen = (int) buffer.size(); 4022 Symbol *name; 4023 if (!intern_if_not_found) { 4024 name = SymbolTable::probe(sigstr, siglen); 4025 } else { 4026 name = SymbolTable::new_symbol(sigstr, siglen); 4027 } 4028 return name; 4029 } 4030 4031 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 4032 if (mt1 == mt2) 4033 return true; 4034 if (rtype(mt1) != rtype(mt2)) 4035 return false; 4036 if (ptype_count(mt1) != ptype_count(mt2)) 4037 return false; 4038 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 4039 if (ptype(mt1, i) != ptype(mt2, i)) 4040 return false; 4041 } 4042 return true; 4043 } 4044 4045 oop java_lang_invoke_MethodType::rtype(oop mt) { 4046 assert(is_instance(mt), "must be a MethodType"); 4047 return mt->obj_field(_rtype_offset); 4048 } 4049 4050 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 4051 assert(is_instance(mt), "must be a MethodType"); 4052 return (objArrayOop) mt->obj_field(_ptypes_offset); 4053 } 4054 4055 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 4056 return ptypes(mt)->obj_at(idx); 4057 } 4058 4059 int java_lang_invoke_MethodType::ptype_count(oop mt) { 4060 return ptypes(mt)->length(); 4061 } 4062 4063 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 4064 objArrayOop pts = ptypes(mt); 4065 int count = pts->length(); 4066 int slots = 0; 4067 for (int i = 0; i < count; i++) { 4068 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 4069 slots += type2size[bt]; 4070 } 4071 return slots; 4072 } 4073 4074 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 4075 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 4076 return type2size[bt]; 4077 } 4078 4079 4080 // Support for java_lang_invoke_CallSite 4081 4082 int java_lang_invoke_CallSite::_target_offset; 4083 int java_lang_invoke_CallSite::_context_offset; 4084 4085 #define CALLSITE_FIELDS_DO(macro) \ 4086 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 4087 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false) 4088 4089 void java_lang_invoke_CallSite::compute_offsets() { 4090 InstanceKlass* k = SystemDictionary::CallSite_klass(); 4091 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4092 } 4093 4094 #if INCLUDE_CDS 4095 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) { 4096 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4097 } 4098 #endif 4099 4100 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) { 4101 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 4102 4103 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset); 4104 return dep_oop; 4105 } 4106 4107 // Support for java_lang_invoke_ConstantCallSite 4108 4109 int java_lang_invoke_ConstantCallSite::_is_frozen_offset; 4110 4111 #define CONSTANTCALLSITE_FIELDS_DO(macro) \ 4112 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false) 4113 4114 void java_lang_invoke_ConstantCallSite::compute_offsets() { 4115 InstanceKlass* k = SystemDictionary::ConstantCallSite_klass(); 4116 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4117 } 4118 4119 #if INCLUDE_CDS 4120 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) { 4121 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4122 } 4123 #endif 4124 4125 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 4126 4127 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 4128 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset; 4129 4130 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 4131 InstanceKlass* k = SystemDictionary::Context_klass(); 4132 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4133 } 4134 4135 #if INCLUDE_CDS 4136 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) { 4137 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4138 } 4139 #endif 4140 4141 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 4142 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 4143 nmethodBucket* volatile* vmdeps_addr = (nmethodBucket* volatile*)call_site->field_addr(_vmdependencies_offset); 4144 volatile uint64_t* last_cleanup_addr = (volatile uint64_t*)call_site->field_addr(_last_cleanup_offset); 4145 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr); 4146 return dep_ctx; 4147 } 4148 4149 // Support for java_security_AccessControlContext 4150 4151 int java_security_AccessControlContext::_context_offset; 4152 int java_security_AccessControlContext::_privilegedContext_offset; 4153 int java_security_AccessControlContext::_isPrivileged_offset; 4154 int java_security_AccessControlContext::_isAuthorized_offset; 4155 4156 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \ 4157 macro(_context_offset, k, "context", protectiondomain_signature, false); \ 4158 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \ 4159 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \ 4160 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false) 4161 4162 void java_security_AccessControlContext::compute_offsets() { 4163 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 4164 InstanceKlass* k = SystemDictionary::AccessControlContext_klass(); 4165 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4166 } 4167 4168 #if INCLUDE_CDS 4169 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) { 4170 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4171 } 4172 #endif 4173 4174 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 4175 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 4176 assert(_isAuthorized_offset != 0, "offsets should have been initialized"); 4177 // Ensure klass is initialized 4178 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_NULL); 4179 // Allocate result 4180 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_NULL); 4181 // Fill in values 4182 result->obj_field_put(_context_offset, context()); 4183 result->obj_field_put(_privilegedContext_offset, privileged_context()); 4184 result->bool_field_put(_isPrivileged_offset, isPrivileged); 4185 // whitelist AccessControlContexts created by the JVM 4186 result->bool_field_put(_isAuthorized_offset, true); 4187 return result; 4188 } 4189 4190 4191 // Support for java_lang_ClassLoader 4192 4193 int java_lang_ClassLoader::_loader_data_offset; 4194 int java_lang_ClassLoader::_parallelCapable_offset; 4195 int java_lang_ClassLoader::_name_offset; 4196 int java_lang_ClassLoader::_nameAndId_offset; 4197 int java_lang_ClassLoader::_unnamedModule_offset; 4198 int java_lang_ClassLoader::_parent_offset; 4199 4200 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) { 4201 assert(loader != NULL, "loader must not be NULL"); 4202 assert(oopDesc::is_oop(loader), "loader must be oop"); 4203 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset); 4204 } 4205 4206 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) { 4207 assert(loader != NULL, "loader must not be NULL"); 4208 assert(oopDesc::is_oop(loader), "loader must be oop"); 4209 return RawAccess<>::load_at(loader, _loader_data_offset); 4210 } 4211 4212 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) { 4213 assert(loader != NULL, "loader must not be NULL"); 4214 assert(oopDesc::is_oop(loader), "loader must be oop"); 4215 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data); 4216 } 4217 4218 #define CLASSLOADER_FIELDS_DO(macro) \ 4219 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 4220 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 4221 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \ 4222 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 4223 macro(_parent_offset, k1, "parent", classloader_signature, false) 4224 4225 void java_lang_ClassLoader::compute_offsets() { 4226 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass(); 4227 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4228 4229 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4230 } 4231 4232 #if INCLUDE_CDS 4233 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) { 4234 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4235 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4236 } 4237 #endif 4238 4239 oop java_lang_ClassLoader::parent(oop loader) { 4240 assert(is_instance(loader), "loader must be oop"); 4241 return loader->obj_field(_parent_offset); 4242 } 4243 4244 // Returns the name field of this class loader. If the name field has not 4245 // been set, null will be returned. 4246 oop java_lang_ClassLoader::name(oop loader) { 4247 assert(is_instance(loader), "loader must be oop"); 4248 return loader->obj_field(_name_offset); 4249 } 4250 4251 // Returns the nameAndId field of this class loader. The format is 4252 // as follows: 4253 // If the defining loader has a name explicitly set then '<loader-name>' @<id> 4254 // If the defining loader has no name then <qualified-class-name> @<id> 4255 // If built-in loader, then omit '@<id>' as there is only one instance. 4256 // Use ClassLoader::loader_name_id() to obtain this String as a char*. 4257 oop java_lang_ClassLoader::nameAndId(oop loader) { 4258 assert(is_instance(loader), "loader must be oop"); 4259 return loader->obj_field(_nameAndId_offset); 4260 } 4261 4262 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 4263 assert(is_instance(loader), "loader must be oop"); 4264 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 4265 oop acl = loader; 4266 debug_only(jint loop_count = 0); 4267 // This loop taken verbatim from ClassLoader.java: 4268 do { 4269 acl = parent(acl); 4270 if (cl == acl) { 4271 return true; 4272 } 4273 assert(++loop_count > 0, "loop_count overflow"); 4274 } while (acl != NULL); 4275 return false; 4276 } 4277 4278 bool java_lang_ClassLoader::is_instance(oop obj) { 4279 return obj != NULL && is_subclass(obj->klass()); 4280 } 4281 4282 4283 // For class loader classes, parallelCapable defined 4284 // based on non-null field 4285 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 4286 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 4287 assert(_parallelCapable_offset != 0, "offsets should have been initialized"); 4288 return (class_loader->obj_field(_parallelCapable_offset) != NULL); 4289 } 4290 4291 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 4292 // Fix for 4474172; see evaluation for more details 4293 loader = non_reflection_class_loader(loader); 4294 4295 oop cl = SystemDictionary::java_system_loader(); 4296 while(cl != NULL) { 4297 if (cl == loader) return true; 4298 cl = parent(cl); 4299 } 4300 return false; 4301 } 4302 4303 // Return true if this is one of the class loaders associated with 4304 // the generated bytecodes for reflection. 4305 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 4306 if (loader != NULL) { 4307 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 4308 // This might be null in non-1.4 JDKs 4309 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)); 4310 } 4311 return false; 4312 } 4313 4314 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 4315 // See whether this is one of the class loaders associated with 4316 // the generated bytecodes for reflection, and if so, "magically" 4317 // delegate to its parent to prevent class loading from occurring 4318 // in places where applications using reflection didn't expect it. 4319 if (is_reflection_class_loader(loader)) { 4320 return parent(loader); 4321 } 4322 return loader; 4323 } 4324 4325 oop java_lang_ClassLoader::unnamedModule(oop loader) { 4326 assert(is_instance(loader), "loader must be oop"); 4327 return loader->obj_field(_unnamedModule_offset); 4328 } 4329 4330 // Support for java_lang_System 4331 // 4332 4333 int java_lang_System::_static_in_offset; 4334 int java_lang_System::_static_out_offset; 4335 int java_lang_System::_static_err_offset; 4336 int java_lang_System::_static_security_offset; 4337 4338 #define SYSTEM_FIELDS_DO(macro) \ 4339 macro(_static_in_offset, k, "in", input_stream_signature, true); \ 4340 macro(_static_out_offset, k, "out", print_stream_signature, true); \ 4341 macro(_static_err_offset, k, "err", print_stream_signature, true); \ 4342 macro(_static_security_offset, k, "security", security_manager_signature, true) 4343 4344 void java_lang_System::compute_offsets() { 4345 InstanceKlass* k = SystemDictionary::System_klass(); 4346 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4347 } 4348 4349 #if INCLUDE_CDS 4350 void java_lang_System::serialize_offsets(SerializeClosure* f) { 4351 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4352 } 4353 #endif 4354 4355 // Support for jdk_internal_misc_UnsafeConstants 4356 // 4357 class UnsafeConstantsFixup : public FieldClosure { 4358 private: 4359 int _address_size; 4360 int _page_size; 4361 bool _big_endian; 4362 bool _use_unaligned_access; 4363 int _data_cache_line_flush_size; 4364 public: 4365 UnsafeConstantsFixup() { 4366 // round up values for all static final fields 4367 _address_size = sizeof(void*); 4368 _page_size = os::vm_page_size(); 4369 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true); 4370 _use_unaligned_access = UseUnalignedAccesses; 4371 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size(); 4372 } 4373 4374 void do_field(fieldDescriptor* fd) { 4375 oop mirror = fd->field_holder()->java_mirror(); 4376 assert(mirror != NULL, "UnsafeConstants must have mirror already"); 4377 assert(fd->field_holder() == SystemDictionary::UnsafeConstants_klass(), "Should be UnsafeConstants"); 4378 assert(fd->is_final(), "fields of UnsafeConstants must be final"); 4379 assert(fd->is_static(), "fields of UnsafeConstants must be static"); 4380 if (fd->name() == vmSymbols::address_size_name()) { 4381 mirror->int_field_put(fd->offset(), _address_size); 4382 } else if (fd->name() == vmSymbols::page_size_name()) { 4383 mirror->int_field_put(fd->offset(), _page_size); 4384 } else if (fd->name() == vmSymbols::big_endian_name()) { 4385 mirror->bool_field_put(fd->offset(), _big_endian); 4386 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) { 4387 mirror->bool_field_put(fd->offset(), _use_unaligned_access); 4388 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) { 4389 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size); 4390 } else { 4391 assert(false, "unexpected UnsafeConstants field"); 4392 } 4393 } 4394 }; 4395 4396 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() { 4397 UnsafeConstantsFixup fixup; 4398 SystemDictionary::UnsafeConstants_klass()->do_local_static_fields(&fixup); 4399 } 4400 4401 4402 // java_lang_StackTraceElement 4403 4404 int java_lang_StackTraceElement::_methodName_offset; 4405 int java_lang_StackTraceElement::_fileName_offset; 4406 int java_lang_StackTraceElement::_lineNumber_offset; 4407 int java_lang_StackTraceElement::_moduleName_offset; 4408 int java_lang_StackTraceElement::_moduleVersion_offset; 4409 int java_lang_StackTraceElement::_classLoaderName_offset; 4410 int java_lang_StackTraceElement::_declaringClass_offset; 4411 int java_lang_StackTraceElement::_declaringClassObject_offset; 4412 4413 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4414 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4415 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4416 macro(_moduleName_offset, k, "moduleName", string_signature, false); \ 4417 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4418 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \ 4419 macro(_methodName_offset, k, "methodName", string_signature, false); \ 4420 macro(_fileName_offset, k, "fileName", string_signature, false); \ 4421 macro(_lineNumber_offset, k, "lineNumber", int_signature, false) 4422 4423 // Support for java_lang_StackTraceElement 4424 void java_lang_StackTraceElement::compute_offsets() { 4425 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 4426 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4427 } 4428 4429 #if INCLUDE_CDS 4430 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) { 4431 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4432 } 4433 #endif 4434 4435 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 4436 element->obj_field_put(_fileName_offset, value); 4437 } 4438 4439 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 4440 element->obj_field_put(_declaringClass_offset, value); 4441 } 4442 4443 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 4444 element->obj_field_put(_methodName_offset, value); 4445 } 4446 4447 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 4448 element->int_field_put(_lineNumber_offset, value); 4449 } 4450 4451 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 4452 element->obj_field_put(_moduleName_offset, value); 4453 } 4454 4455 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 4456 element->obj_field_put(_moduleVersion_offset, value); 4457 } 4458 4459 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 4460 element->obj_field_put(_classLoaderName_offset, value); 4461 } 4462 4463 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 4464 element->obj_field_put(_declaringClassObject_offset, value); 4465 } 4466 4467 4468 // java_lang_AssertionStatusDirectives 4469 4470 int java_lang_AssertionStatusDirectives::_classes_offset; 4471 int java_lang_AssertionStatusDirectives::_classEnabled_offset; 4472 int java_lang_AssertionStatusDirectives::_packages_offset; 4473 int java_lang_AssertionStatusDirectives::_packageEnabled_offset; 4474 int java_lang_AssertionStatusDirectives::_deflt_offset; 4475 4476 // Support for java Assertions - java_lang_AssertionStatusDirectives. 4477 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 4478 macro(_classes_offset, k, "classes", string_array_signature, false); \ 4479 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 4480 macro(_packages_offset, k, "packages", string_array_signature, false); \ 4481 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 4482 macro(_deflt_offset, k, "deflt", bool_signature, false) 4483 4484 void java_lang_AssertionStatusDirectives::compute_offsets() { 4485 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass(); 4486 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4487 } 4488 4489 #if INCLUDE_CDS 4490 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) { 4491 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4492 } 4493 #endif 4494 4495 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 4496 o->obj_field_put(_classes_offset, val); 4497 } 4498 4499 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 4500 o->obj_field_put(_classEnabled_offset, val); 4501 } 4502 4503 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 4504 o->obj_field_put(_packages_offset, val); 4505 } 4506 4507 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 4508 o->obj_field_put(_packageEnabled_offset, val); 4509 } 4510 4511 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 4512 o->bool_field_put(_deflt_offset, val); 4513 } 4514 4515 4516 // Support for intrinsification of java.nio.Buffer.checkIndex 4517 4518 int java_nio_Buffer::_limit_offset; 4519 4520 #define BUFFER_FIELDS_DO(macro) \ 4521 macro(_limit_offset, k, "limit", int_signature, false) 4522 4523 void java_nio_Buffer::compute_offsets() { 4524 InstanceKlass* k = SystemDictionary::nio_Buffer_klass(); 4525 assert(k != NULL, "must be loaded in 1.4+"); 4526 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4527 } 4528 4529 #if INCLUDE_CDS 4530 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) { 4531 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4532 } 4533 #endif 4534 4535 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset; 4536 4537 #define AOS_FIELDS_DO(macro) \ 4538 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false) 4539 4540 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() { 4541 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass(); 4542 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4543 } 4544 4545 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 4546 assert(_owner_offset != 0, "Must be initialized"); 4547 return obj->obj_field(_owner_offset); 4548 } 4549 4550 #if INCLUDE_CDS 4551 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) { 4552 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4553 } 4554 #endif 4555 4556 int java_lang_Integer_IntegerCache::_static_cache_offset; 4557 int java_lang_Long_LongCache::_static_cache_offset; 4558 int java_lang_Character_CharacterCache::_static_cache_offset; 4559 int java_lang_Short_ShortCache::_static_cache_offset; 4560 int java_lang_Byte_ByteCache::_static_cache_offset; 4561 4562 #define INTEGER_CACHE_FIELDS_DO(macro) \ 4563 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true) 4564 4565 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) { 4566 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4567 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4568 } 4569 4570 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) { 4571 oop base = ik->static_field_base_raw(); 4572 return objArrayOop(base->obj_field(_static_cache_offset)); 4573 } 4574 4575 Symbol* java_lang_Integer_IntegerCache::symbol() { 4576 return vmSymbols::java_lang_Integer_IntegerCache(); 4577 } 4578 4579 #if INCLUDE_CDS 4580 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) { 4581 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4582 } 4583 #endif 4584 #undef INTEGER_CACHE_FIELDS_DO 4585 4586 jint java_lang_Integer::value(oop obj) { 4587 jvalue v; 4588 java_lang_boxing_object::get_value(obj, &v); 4589 return v.i; 4590 } 4591 4592 #define LONG_CACHE_FIELDS_DO(macro) \ 4593 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true) 4594 4595 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) { 4596 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4597 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4598 } 4599 4600 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) { 4601 oop base = ik->static_field_base_raw(); 4602 return objArrayOop(base->obj_field(_static_cache_offset)); 4603 } 4604 4605 Symbol* java_lang_Long_LongCache::symbol() { 4606 return vmSymbols::java_lang_Long_LongCache(); 4607 } 4608 4609 #if INCLUDE_CDS 4610 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) { 4611 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4612 } 4613 #endif 4614 #undef LONG_CACHE_FIELDS_DO 4615 4616 jlong java_lang_Long::value(oop obj) { 4617 jvalue v; 4618 java_lang_boxing_object::get_value(obj, &v); 4619 return v.j; 4620 } 4621 4622 #define CHARACTER_CACHE_FIELDS_DO(macro) \ 4623 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true) 4624 4625 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) { 4626 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4627 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4628 } 4629 4630 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) { 4631 oop base = ik->static_field_base_raw(); 4632 return objArrayOop(base->obj_field(_static_cache_offset)); 4633 } 4634 4635 Symbol* java_lang_Character_CharacterCache::symbol() { 4636 return vmSymbols::java_lang_Character_CharacterCache(); 4637 } 4638 4639 #if INCLUDE_CDS 4640 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) { 4641 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4642 } 4643 #endif 4644 #undef CHARACTER_CACHE_FIELDS_DO 4645 4646 jchar java_lang_Character::value(oop obj) { 4647 jvalue v; 4648 java_lang_boxing_object::get_value(obj, &v); 4649 return v.c; 4650 } 4651 4652 #define SHORT_CACHE_FIELDS_DO(macro) \ 4653 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true) 4654 4655 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) { 4656 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4657 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4658 } 4659 4660 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) { 4661 oop base = ik->static_field_base_raw(); 4662 return objArrayOop(base->obj_field(_static_cache_offset)); 4663 } 4664 4665 Symbol* java_lang_Short_ShortCache::symbol() { 4666 return vmSymbols::java_lang_Short_ShortCache(); 4667 } 4668 4669 #if INCLUDE_CDS 4670 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) { 4671 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4672 } 4673 #endif 4674 #undef SHORT_CACHE_FIELDS_DO 4675 4676 jshort java_lang_Short::value(oop obj) { 4677 jvalue v; 4678 java_lang_boxing_object::get_value(obj, &v); 4679 return v.s; 4680 } 4681 4682 #define BYTE_CACHE_FIELDS_DO(macro) \ 4683 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true) 4684 4685 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) { 4686 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4687 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4688 } 4689 4690 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) { 4691 oop base = ik->static_field_base_raw(); 4692 return objArrayOop(base->obj_field(_static_cache_offset)); 4693 } 4694 4695 Symbol* java_lang_Byte_ByteCache::symbol() { 4696 return vmSymbols::java_lang_Byte_ByteCache(); 4697 } 4698 4699 #if INCLUDE_CDS 4700 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) { 4701 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4702 } 4703 #endif 4704 #undef BYTE_CACHE_FIELDS_DO 4705 4706 jbyte java_lang_Byte::value(oop obj) { 4707 jvalue v; 4708 java_lang_boxing_object::get_value(obj, &v); 4709 return v.b; 4710 } 4711 4712 int java_lang_Boolean::_static_TRUE_offset; 4713 int java_lang_Boolean::_static_FALSE_offset; 4714 4715 #define BOOLEAN_FIELDS_DO(macro) \ 4716 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \ 4717 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true) 4718 4719 4720 void java_lang_Boolean::compute_offsets(InstanceKlass *k) { 4721 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4722 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4723 } 4724 4725 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) { 4726 oop base = ik->static_field_base_raw(); 4727 return base->obj_field(_static_TRUE_offset); 4728 } 4729 4730 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) { 4731 oop base = ik->static_field_base_raw(); 4732 return base->obj_field(_static_FALSE_offset); 4733 } 4734 4735 Symbol* java_lang_Boolean::symbol() { 4736 return vmSymbols::java_lang_Boolean(); 4737 } 4738 4739 #if INCLUDE_CDS 4740 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) { 4741 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4742 } 4743 #endif 4744 #undef BOOLEAN_CACHE_FIELDS_DO 4745 4746 jboolean java_lang_Boolean::value(oop obj) { 4747 jvalue v; 4748 java_lang_boxing_object::get_value(obj, &v); 4749 return v.z; 4750 } 4751 4752 // java_lang_reflect_RecordComponent 4753 4754 int java_lang_reflect_RecordComponent::_clazz_offset; 4755 int java_lang_reflect_RecordComponent::_name_offset; 4756 int java_lang_reflect_RecordComponent::_type_offset; 4757 int java_lang_reflect_RecordComponent::_accessor_offset; 4758 int java_lang_reflect_RecordComponent::_signature_offset; 4759 int java_lang_reflect_RecordComponent::_annotations_offset; 4760 int java_lang_reflect_RecordComponent::_typeAnnotations_offset; 4761 4762 #define RECORDCOMPONENT_FIELDS_DO(macro) \ 4763 macro(_clazz_offset, k, "clazz", class_signature, false); \ 4764 macro(_name_offset, k, "name", string_signature, false); \ 4765 macro(_type_offset, k, "type", class_signature, false); \ 4766 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \ 4767 macro(_signature_offset, k, "signature", string_signature, false); \ 4768 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \ 4769 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false); 4770 4771 // Support for java_lang_reflect_RecordComponent 4772 void java_lang_reflect_RecordComponent::compute_offsets() { 4773 InstanceKlass* k = SystemDictionary::RecordComponent_klass(); 4774 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4775 } 4776 4777 #if INCLUDE_CDS 4778 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) { 4779 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4780 } 4781 #endif 4782 4783 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) { 4784 element->obj_field_put(_clazz_offset, value); 4785 } 4786 4787 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) { 4788 element->obj_field_put(_name_offset, value); 4789 } 4790 4791 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) { 4792 element->obj_field_put(_type_offset, value); 4793 } 4794 4795 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) { 4796 element->obj_field_put(_accessor_offset, value); 4797 } 4798 4799 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) { 4800 element->obj_field_put(_signature_offset, value); 4801 } 4802 4803 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) { 4804 element->obj_field_put(_annotations_offset, value); 4805 } 4806 4807 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) { 4808 element->obj_field_put(_typeAnnotations_offset, value); 4809 } 4810 4811 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets(); 4812 4813 // Compute field offsets of all the classes in this file 4814 void JavaClasses::compute_offsets() { 4815 if (UseSharedSpaces) { 4816 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() && 4817 JvmtiExport::has_early_class_hook_env()), 4818 "JavaClasses::compute_offsets() must be called in early JVMTI phase.")); 4819 // None of the classes used by the rest of this function can be replaced by 4820 // JVMTI ClassFileLoadHook. 4821 // We are safe to use the archived offsets, which have already been restored 4822 // by JavaClasses::serialize_offsets, without computing the offsets again. 4823 return; 4824 } 4825 4826 // We have already called the compute_offsets() of the 4827 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and 4828 // java_lang_ref_Reference) earlier inside SystemDictionary::resolve_well_known_classes() 4829 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS); 4830 } 4831 4832 #if INCLUDE_CDS 4833 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc); 4834 4835 void JavaClasses::serialize_offsets(SerializeClosure* soc) { 4836 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS); 4837 } 4838 #endif 4839 4840 #if INCLUDE_CDS_JAVA_HEAP 4841 bool JavaClasses::is_supported_for_archiving(oop obj) { 4842 Klass* klass = obj->klass(); 4843 4844 if (klass == SystemDictionary::ClassLoader_klass() || // ClassLoader::loader_data is malloc'ed. 4845 klass == SystemDictionary::Module_klass() || // Module::module_entry is malloc'ed 4846 // The next 3 classes are used to implement java.lang.invoke, and are not used directly in 4847 // regular Java code. The implementation of java.lang.invoke uses generated anonymoys classes 4848 // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS. 4849 // So for now we cannot not support these classes for archiving. 4850 // 4851 // These objects typically are not referenced by static fields, but rather by resolved 4852 // constant pool entries, so excluding them shouldn't affect the archiving of static fields. 4853 klass == SystemDictionary::ResolvedMethodName_klass() || 4854 klass == SystemDictionary::MemberName_klass() || 4855 klass == SystemDictionary::Context_klass()) { 4856 return false; 4857 } 4858 4859 return true; 4860 } 4861 #endif 4862 4863 #ifndef PRODUCT 4864 4865 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check. 4866 4867 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name, 4868 const char* field_sig) { 4869 EXCEPTION_MARK; 4870 fieldDescriptor fd; 4871 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name); 4872 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 4873 InstanceKlass* ik = InstanceKlass::cast(k); 4874 TempNewSymbol f_name = SymbolTable::new_symbol(field_name); 4875 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig); 4876 if (!ik->find_local_field(f_name, f_sig, &fd)) { 4877 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 4878 return false; 4879 } 4880 if (fd.is_static()) { 4881 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 4882 return false; 4883 } 4884 if (fd.offset() == deserialized_offset ) { 4885 return true; 4886 } else { 4887 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.", 4888 klass_name, field_name, deserialized_offset, fd.offset()); 4889 return false; 4890 } 4891 } 4892 4893 void JavaClasses::check_offsets() { 4894 bool valid = true; 4895 4896 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4897 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig) 4898 4899 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4900 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig) 4901 4902 // Boxed primitive objects (java_lang_boxing_object) 4903 4904 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 4905 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 4906 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 4907 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 4908 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 4909 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 4910 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 4911 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 4912 4913 if (!valid) vm_exit_during_initialization("Field offset verification failed"); 4914 } 4915 4916 #endif // PRODUCT 4917 4918 int InjectedField::compute_offset() { 4919 InstanceKlass* ik = InstanceKlass::cast(klass()); 4920 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4921 if (!may_be_java && !fs.access_flags().is_internal()) { 4922 // Only look at injected fields 4923 continue; 4924 } 4925 if (fs.name() == name() && fs.signature() == signature()) { 4926 return fs.offset(); 4927 } 4928 } 4929 ResourceMark rm; 4930 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)" : ""); 4931 #ifndef PRODUCT 4932 ik->print(); 4933 tty->print_cr("all fields:"); 4934 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4935 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 4936 } 4937 #endif //PRODUCT 4938 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 4939 return -1; 4940 } 4941 4942 void javaClasses_init() { 4943 JavaClasses::compute_offsets(); 4944 JavaClasses::check_offsets(); 4945 FilteredFieldsMap::initialize(); // must be done after computing offsets. 4946 }