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 int java_lang_String::value_offset = 0; 181 int java_lang_String::hash_offset = 0; 182 int java_lang_String::hashIsZero_offset = 0; 183 int java_lang_String::coder_offset = 0; 184 185 bool java_lang_String::initialized = false; 186 187 bool java_lang_String::is_instance(oop obj) { 188 return is_instance_inlined(obj); 189 } 190 191 #if INCLUDE_CDS 192 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \ 193 f->do_u4((u4*)&offset) 194 #endif 195 196 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \ 197 compute_offset(offset, klass, name, vmSymbols::signature(), is_static) 198 199 #define STRING_FIELDS_DO(macro) \ 200 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \ 201 macro(hash_offset, k, "hash", int_signature, false); \ 202 macro(hashIsZero_offset, k, "hashIsZero", bool_signature, false); \ 203 macro(coder_offset, k, "coder", byte_signature, false); 204 205 void java_lang_String::compute_offsets() { 206 if (initialized) { 207 return; 208 } 209 210 InstanceKlass* k = SystemDictionary::String_klass(); 211 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 212 213 initialized = true; 214 } 215 216 #if INCLUDE_CDS 217 void java_lang_String::serialize_offsets(SerializeClosure* f) { 218 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 219 f->do_bool(&initialized); 220 } 221 #endif 222 223 class CompactStringsFixup : public FieldClosure { 224 private: 225 bool _value; 226 227 public: 228 CompactStringsFixup(bool value) : _value(value) {} 229 230 void do_field(fieldDescriptor* fd) { 231 if (fd->name() == vmSymbols::compact_strings_name()) { 232 oop mirror = fd->field_holder()->java_mirror(); 233 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String"); 234 assert(mirror != NULL, "String must have mirror already"); 235 mirror->bool_field_put(fd->offset(), _value); 236 } 237 } 238 }; 239 240 void java_lang_String::set_compact_strings(bool value) { 241 CompactStringsFixup fix(value); 242 SystemDictionary::String_klass()->do_local_static_fields(&fix); 243 } 244 245 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 246 assert(initialized, "Must be initialized"); 247 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 248 249 // Create the String object first, so there's a chance that the String 250 // and the char array it points to end up in the same cache line. 251 oop obj; 252 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH); 253 254 // Create the char array. The String object must be handlized here 255 // because GC can happen as a result of the allocation attempt. 256 Handle h_obj(THREAD, obj); 257 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 258 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 259 260 // Point the String at the char array 261 obj = h_obj(); 262 set_value(obj, buffer); 263 // No need to zero the offset, allocation zero'ed the entire String object 264 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 265 return h_obj; 266 } 267 268 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) { 269 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 270 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 271 typeArrayOop buffer = value(h_obj()); 272 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 273 if (is_latin1) { 274 for (int index = 0; index < length; index++) { 275 buffer->byte_at_put(index, (jbyte)unicode[index]); 276 } 277 } else { 278 for (int index = 0; index < length; index++) { 279 buffer->char_at_put(index, unicode[index]); 280 } 281 } 282 283 #ifdef ASSERT 284 { 285 ResourceMark rm; 286 char* expected = UNICODE::as_utf8(unicode, length); 287 char* actual = as_utf8_string(h_obj()); 288 if (strcmp(expected, actual) != 0) { 289 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual); 290 ShouldNotReachHere(); 291 } 292 } 293 #endif 294 295 return h_obj; 296 } 297 298 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) { 299 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL); 300 return h_obj(); 301 } 302 303 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 304 if (utf8_str == NULL) { 305 return Handle(); 306 } 307 bool has_multibyte, is_latin1; 308 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 309 if (!CompactStrings) { 310 has_multibyte = true; 311 is_latin1 = false; 312 } 313 314 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 315 if (length > 0) { 316 if (!has_multibyte) { 317 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 318 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 319 } else if (is_latin1) { 320 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 321 } else { 322 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 323 } 324 } 325 326 #ifdef ASSERT 327 // This check is too strict because the input string is not necessarily valid UTF8. 328 // For example, it may be created with arbitrary content via jni_NewStringUTF. 329 /* 330 { 331 ResourceMark rm; 332 const char* expected = utf8_str; 333 char* actual = as_utf8_string(h_obj()); 334 if (strcmp(expected, actual) != 0) { 335 tty->print_cr("String conversion failure: %s --> %s", expected, actual); 336 ShouldNotReachHere(); 337 } 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 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual); 380 ShouldNotReachHere(); 381 } 382 } 383 #endif 384 385 return h_obj; 386 } 387 388 // Converts a C string to a Java String based on current encoding 389 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 390 assert(str != NULL, "bad arguments"); 391 392 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *); 393 static to_java_string_fn_t _to_java_string_fn = NULL; 394 395 if (_to_java_string_fn == NULL) { 396 void *lib_handle = os::native_java_library(); 397 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform")); 398 #if defined(_WIN32) && !defined(_WIN64) 399 if (_to_java_string_fn == NULL) { 400 // On 32 bit Windows, also try __stdcall decorated name 401 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8")); 402 } 403 #endif 404 if (_to_java_string_fn == NULL) { 405 fatal("JNU_NewStringPlatform missing"); 406 } 407 } 408 409 jstring js = NULL; 410 { 411 assert(THREAD->is_Java_thread(), "must be java thread"); 412 JavaThread* thread = (JavaThread*)THREAD; 413 HandleMark hm(thread); 414 ThreadToNativeFromVM ttn(thread); 415 js = (_to_java_string_fn)(thread->jni_environment(), str); 416 } 417 418 Handle native_platform_string(THREAD, JNIHandles::resolve(js)); 419 JNIHandles::destroy_local(js); // destroy local JNIHandle. 420 return native_platform_string; 421 } 422 423 // Converts a Java String to a native C string that can be used for 424 // native OS calls. 425 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 426 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 427 static to_platform_string_fn_t _to_platform_string_fn = NULL; 428 429 if (_to_platform_string_fn == NULL) { 430 void *lib_handle = os::native_java_library(); 431 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 432 if (_to_platform_string_fn == NULL) { 433 fatal("GetStringPlatformChars missing"); 434 } 435 } 436 437 char *native_platform_string; 438 { JavaThread* thread = (JavaThread*)THREAD; 439 assert(thread->is_Java_thread(), "must be java thread"); 440 JNIEnv *env = thread->jni_environment(); 441 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 442 bool is_copy; 443 HandleMark hm(thread); 444 ThreadToNativeFromVM ttn(thread); 445 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 446 assert(is_copy == JNI_TRUE, "is_copy value changed"); 447 JNIHandles::destroy_local(js); 448 } 449 return native_platform_string; 450 } 451 452 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 453 oop obj = java_string(); 454 // Typical usage is to convert all '/' to '.' in string. 455 typeArrayOop value = java_lang_String::value(obj); 456 int length = java_lang_String::length(obj, value); 457 bool is_latin1 = java_lang_String::is_latin1(obj); 458 459 // First check if any from_char exist 460 int index; // Declared outside, used later 461 for (index = 0; index < length; index++) { 462 jchar c = !is_latin1 ? value->char_at(index) : 463 ((jchar) value->byte_at(index)) & 0xff; 464 if (c == from_char) { 465 break; 466 } 467 } 468 if (index == length) { 469 // No from_char, so do not copy. 470 return java_string; 471 } 472 473 // Check if result string will be latin1 474 bool to_is_latin1 = false; 475 476 // Replacement char must be latin1 477 if (CompactStrings && UNICODE::is_latin1(to_char)) { 478 if (is_latin1) { 479 // Source string is latin1 as well 480 to_is_latin1 = true; 481 } else if (!UNICODE::is_latin1(from_char)) { 482 // We are replacing an UTF16 char. Scan string to 483 // check if result can be latin1 encoded. 484 to_is_latin1 = true; 485 for (index = 0; index < length; index++) { 486 jchar c = value->char_at(index); 487 if (c != from_char && !UNICODE::is_latin1(c)) { 488 to_is_latin1 = false; 489 break; 490 } 491 } 492 } 493 } 494 495 // Create new UNICODE (or byte) buffer. Must handlize value because GC 496 // may happen during String and char array creation. 497 typeArrayHandle h_value(THREAD, value); 498 Handle string = basic_create(length, to_is_latin1, CHECK_NH); 499 typeArrayOop from_buffer = h_value(); 500 typeArrayOop to_buffer = java_lang_String::value(string()); 501 502 // Copy contents 503 for (index = 0; index < length; index++) { 504 jchar c = (!is_latin1) ? from_buffer->char_at(index) : 505 ((jchar) from_buffer->byte_at(index)) & 0xff; 506 if (c == from_char) { 507 c = to_char; 508 } 509 if (!to_is_latin1) { 510 to_buffer->char_at_put(index, c); 511 } else { 512 to_buffer->byte_at_put(index, (jbyte) c); 513 } 514 } 515 return string; 516 } 517 518 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 519 typeArrayOop value = java_lang_String::value(java_string); 520 length = java_lang_String::length(java_string, value); 521 bool is_latin1 = java_lang_String::is_latin1(java_string); 522 523 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 524 if (result != NULL) { 525 if (!is_latin1) { 526 for (int index = 0; index < length; index++) { 527 result[index] = value->char_at(index); 528 } 529 } else { 530 for (int index = 0; index < length; index++) { 531 result[index] = ((jchar) value->byte_at(index)) & 0xff; 532 } 533 } 534 } else { 535 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 536 } 537 return result; 538 } 539 540 unsigned int java_lang_String::hash_code(oop java_string) { 541 // The hash and hashIsZero fields are subject to a benign data race, 542 // making it crucial to ensure that any observable result of the 543 // calculation in this method stays correct under any possible read of 544 // these fields. Necessary restrictions to allow this to be correct 545 // without explicit memory fences or similar concurrency primitives is 546 // that we can ever only write to one of these two fields for a given 547 // String instance, and that the computation is idempotent and derived 548 // from immutable state 549 assert(initialized && (hash_offset > 0) && (hashIsZero_offset > 0), "Must be initialized"); 550 if (java_lang_String::hash_is_set(java_string)) { 551 return java_string->int_field(hash_offset); 552 } 553 554 typeArrayOop value = java_lang_String::value(java_string); 555 int length = java_lang_String::length(java_string, value); 556 bool is_latin1 = java_lang_String::is_latin1(java_string); 557 558 unsigned int hash = 0; 559 if (length > 0) { 560 if (is_latin1) { 561 hash = java_lang_String::hash_code(value->byte_at_addr(0), length); 562 } else { 563 hash = java_lang_String::hash_code(value->char_at_addr(0), length); 564 } 565 } 566 567 if (hash != 0) { 568 java_string->int_field_put(hash_offset, hash); 569 } else { 570 java_string->bool_field_put(hashIsZero_offset, true); 571 } 572 return hash; 573 } 574 575 char* java_lang_String::as_quoted_ascii(oop java_string) { 576 typeArrayOop value = java_lang_String::value(java_string); 577 int length = java_lang_String::length(java_string, value); 578 bool is_latin1 = java_lang_String::is_latin1(java_string); 579 580 if (length == 0) return NULL; 581 582 char* result; 583 int result_length; 584 if (!is_latin1) { 585 jchar* base = value->char_at_addr(0); 586 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 587 result = NEW_RESOURCE_ARRAY(char, result_length); 588 UNICODE::as_quoted_ascii(base, length, result, result_length); 589 } else { 590 jbyte* base = value->byte_at_addr(0); 591 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 592 result = NEW_RESOURCE_ARRAY(char, result_length); 593 UNICODE::as_quoted_ascii(base, length, result, result_length); 594 } 595 assert(result_length >= length + 1, "must not be shorter"); 596 assert(result_length == (int)strlen(result) + 1, "must match"); 597 return result; 598 } 599 600 Symbol* java_lang_String::as_symbol(oop java_string) { 601 typeArrayOop value = java_lang_String::value(java_string); 602 int length = java_lang_String::length(java_string, value); 603 bool is_latin1 = java_lang_String::is_latin1(java_string); 604 if (!is_latin1) { 605 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 606 Symbol* sym = SymbolTable::new_symbol(base, length); 607 return sym; 608 } else { 609 ResourceMark rm; 610 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 611 const char* base = UNICODE::as_utf8(position, length); 612 Symbol* sym = SymbolTable::new_symbol(base, length); 613 return sym; 614 } 615 } 616 617 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 618 typeArrayOop value = java_lang_String::value(java_string); 619 int length = java_lang_String::length(java_string, value); 620 bool is_latin1 = java_lang_String::is_latin1(java_string); 621 if (!is_latin1) { 622 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 623 return SymbolTable::probe_unicode(base, length); 624 } else { 625 ResourceMark rm; 626 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 627 const char* base = UNICODE::as_utf8(position, length); 628 return SymbolTable::probe(base, length); 629 } 630 } 631 632 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) { 633 assert(value_equals(value, java_lang_String::value(java_string)), 634 "value must be same as java_lang_String::value(java_string)"); 635 int length = java_lang_String::length(java_string, value); 636 if (length == 0) { 637 return 0; 638 } 639 if (!java_lang_String::is_latin1(java_string)) { 640 return UNICODE::utf8_length(value->char_at_addr(0), length); 641 } else { 642 return UNICODE::utf8_length(value->byte_at_addr(0), length); 643 } 644 } 645 646 int java_lang_String::utf8_length(oop java_string) { 647 typeArrayOop value = java_lang_String::value(java_string); 648 return utf8_length(java_string, value); 649 } 650 651 char* java_lang_String::as_utf8_string(oop java_string) { 652 typeArrayOop value = java_lang_String::value(java_string); 653 int length = java_lang_String::length(java_string, value); 654 bool is_latin1 = java_lang_String::is_latin1(java_string); 655 if (!is_latin1) { 656 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 657 return UNICODE::as_utf8(position, length); 658 } else { 659 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 660 return UNICODE::as_utf8(position, length); 661 } 662 } 663 664 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) { 665 assert(value_equals(value, java_lang_String::value(java_string)), 666 "value must be same as java_lang_String::value(java_string)"); 667 int length = java_lang_String::length(java_string, value); 668 bool is_latin1 = java_lang_String::is_latin1(java_string); 669 if (!is_latin1) { 670 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 671 return UNICODE::as_utf8(position, length, buf, buflen); 672 } else { 673 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 674 return UNICODE::as_utf8(position, length, buf, buflen); 675 } 676 } 677 678 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 679 typeArrayOop value = java_lang_String::value(java_string); 680 return as_utf8_string(java_string, value, buf, buflen); 681 } 682 683 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 684 typeArrayOop value = java_lang_String::value(java_string); 685 bool is_latin1 = java_lang_String::is_latin1(java_string); 686 assert(start + len <= java_lang_String::length(java_string), "just checking"); 687 if (!is_latin1) { 688 jchar* position = value->char_at_addr(start); 689 return UNICODE::as_utf8(position, len); 690 } else { 691 jbyte* position = value->byte_at_addr(start); 692 return UNICODE::as_utf8(position, len); 693 } 694 } 695 696 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) { 697 assert(value_equals(value, java_lang_String::value(java_string)), 698 "value must be same as java_lang_String::value(java_string)"); 699 assert(start + len <= java_lang_String::length(java_string), "just checking"); 700 bool is_latin1 = java_lang_String::is_latin1(java_string); 701 if (!is_latin1) { 702 jchar* position = value->char_at_addr(start); 703 return UNICODE::as_utf8(position, len, buf, buflen); 704 } else { 705 jbyte* position = value->byte_at_addr(start); 706 return UNICODE::as_utf8(position, len, buf, buflen); 707 } 708 } 709 710 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) { 711 assert(java_string->klass() == SystemDictionary::String_klass(), 712 "must be java_string"); 713 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 714 int length = java_lang_String::length(java_string, value); 715 if (length != len) { 716 return false; 717 } 718 bool is_latin1 = java_lang_String::is_latin1(java_string); 719 if (!is_latin1) { 720 for (int i = 0; i < len; i++) { 721 if (value->char_at(i) != chars[i]) { 722 return false; 723 } 724 } 725 } else { 726 for (int i = 0; i < len; i++) { 727 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 728 return false; 729 } 730 } 731 } 732 return true; 733 } 734 735 bool java_lang_String::equals(oop str1, oop str2) { 736 assert(str1->klass() == SystemDictionary::String_klass(), 737 "must be java String"); 738 assert(str2->klass() == SystemDictionary::String_klass(), 739 "must be java String"); 740 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1); 741 bool is_latin1 = java_lang_String::is_latin1(str1); 742 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2); 743 bool is_latin2 = java_lang_String::is_latin1(str2); 744 745 if (is_latin1 != is_latin2) { 746 // Strings with different coders are never equal. 747 return false; 748 } 749 return value_equals(value1, value2); 750 } 751 752 void java_lang_String::print(oop java_string, outputStream* st) { 753 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 754 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 755 756 if (value == NULL) { 757 // This can happen if, e.g., printing a String 758 // object before its initializer has been called 759 st->print("NULL"); 760 return; 761 } 762 763 int length = java_lang_String::length(java_string, value); 764 bool is_latin1 = java_lang_String::is_latin1(java_string); 765 766 st->print("\""); 767 for (int index = 0; index < length; index++) { 768 st->print("%c", (!is_latin1) ? value->char_at(index) : 769 ((jchar) value->byte_at(index)) & 0xff ); 770 } 771 st->print("\""); 772 } 773 774 775 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 776 assert(mirror.not_null() && fd->is_static(), "just checking"); 777 if (fd->has_initial_value()) { 778 BasicType t = fd->field_type(); 779 switch (t) { 780 case T_BYTE: 781 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 782 break; 783 case T_BOOLEAN: 784 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 785 break; 786 case T_CHAR: 787 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 788 break; 789 case T_SHORT: 790 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 791 break; 792 case T_INT: 793 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 794 break; 795 case T_FLOAT: 796 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 797 break; 798 case T_DOUBLE: 799 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 800 break; 801 case T_LONG: 802 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 803 break; 804 case T_OBJECT: 805 { 806 assert(fd->signature() == vmSymbols::string_signature(), 807 "just checking"); 808 if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) { 809 // Archive the String field and update the pointer. 810 oop s = mirror()->obj_field(fd->offset()); 811 oop archived_s = StringTable::create_archived_string(s, CHECK); 812 mirror()->obj_field_put(fd->offset(), archived_s); 813 } else { 814 oop string = fd->string_initial_value(CHECK); 815 mirror()->obj_field_put(fd->offset(), string); 816 } 817 } 818 break; 819 default: 820 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 821 "Illegal ConstantValue attribute in class file"); 822 } 823 } 824 } 825 826 827 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 828 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 829 830 // If the offset was read from the shared archive, it was fixed up already 831 if (!k->is_shared()) { 832 if (k->is_instance_klass()) { 833 // During bootstrap, java.lang.Class wasn't loaded so static field 834 // offsets were computed without the size added it. Go back and 835 // update all the static field offsets to included the size. 836 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) { 837 if (fs.access_flags().is_static()) { 838 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 839 fs.set_offset(real_offset); 840 } 841 } 842 } 843 } 844 845 if (k->is_shared() && k->has_raw_archived_mirror()) { 846 if (HeapShared::open_archive_heap_region_mapped()) { 847 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK); 848 assert(present, "Missing archived mirror for %s", k->external_name()); 849 return; 850 } else { 851 k->set_java_mirror_handle(NULL); 852 k->clear_has_raw_archived_mirror(); 853 } 854 } 855 create_mirror(k, Handle(), Handle(), Handle(), CHECK); 856 } 857 858 void java_lang_Class::initialize_mirror_fields(Klass* k, 859 Handle mirror, 860 Handle protection_domain, 861 TRAPS) { 862 // Allocate a simple java object for a lock. 863 // This needs to be a java object because during class initialization 864 // it can be held across a java call. 865 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 866 set_init_lock(mirror(), r); 867 868 // Set protection domain also 869 set_protection_domain(mirror(), protection_domain()); 870 871 // Initialize static fields 872 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 873 } 874 875 // Set the java.lang.Module module field in the java_lang_Class mirror 876 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) { 877 if (module.is_null()) { 878 // During startup, the module may be NULL only if java.base has not been defined yet. 879 // Put the class on the fixup_module_list to patch later when the java.lang.Module 880 // for java.base is known. But note that since we captured the NULL module another 881 // thread may have completed that initialization. 882 883 bool javabase_was_defined = false; 884 { 885 MutexLocker m1(THREAD, Module_lock); 886 // Keep list of classes needing java.base module fixup 887 if (!ModuleEntryTable::javabase_defined()) { 888 assert(k->java_mirror() != NULL, "Class's mirror is null"); 889 k->class_loader_data()->inc_keep_alive(); 890 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized"); 891 fixup_module_field_list()->push(k); 892 } else { 893 javabase_was_defined = true; 894 } 895 } 896 897 // If java.base was already defined then patch this particular class with java.base. 898 if (javabase_was_defined) { 899 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 900 assert(javabase_entry != NULL && javabase_entry->module() != NULL, 901 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 902 Handle javabase_handle(THREAD, javabase_entry->module()); 903 set_module(mirror(), javabase_handle()); 904 } 905 } else { 906 assert(Universe::is_module_initialized() || 907 (ModuleEntryTable::javabase_defined() && 908 (module() == ModuleEntryTable::javabase_moduleEntry()->module())), 909 "Incorrect java.lang.Module specification while creating mirror"); 910 set_module(mirror(), module()); 911 } 912 } 913 914 // Statically allocate fixup lists because they always get created. 915 void java_lang_Class::allocate_fixup_lists() { 916 GrowableArray<Klass*>* mirror_list = 917 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 918 set_fixup_mirror_list(mirror_list); 919 920 GrowableArray<Klass*>* module_list = 921 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true); 922 set_fixup_module_field_list(module_list); 923 } 924 925 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 926 Handle module, Handle protection_domain, TRAPS) { 927 assert(k != NULL, "Use create_basic_type_mirror for primitive types"); 928 assert(k->java_mirror() == NULL, "should only assign mirror once"); 929 930 // Use this moment of initialization to cache modifier_flags also, 931 // to support Class.getModifiers(). Instance classes recalculate 932 // the cached flags after the class file is parsed, but before the 933 // class is put into the system dictionary. 934 int computed_modifiers = k->compute_modifier_flags(CHECK); 935 k->set_modifier_flags(computed_modifiers); 936 // Class_klass has to be loaded because it is used to allocate 937 // the mirror. 938 if (SystemDictionary::Class_klass_loaded()) { 939 // Allocate mirror (java.lang.Class instance) 940 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 941 Handle mirror(THREAD, mirror_oop); 942 Handle comp_mirror; 943 944 // Setup indirection from mirror->klass 945 java_lang_Class::set_klass(mirror(), k); 946 947 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 948 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 949 950 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 951 952 // It might also have a component mirror. This mirror must already exist. 953 if (k->is_array_klass()) { 954 if (k->is_typeArray_klass()) { 955 BasicType type = TypeArrayKlass::cast(k)->element_type(); 956 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 957 } else { 958 assert(k->is_objArray_klass(), "Must be"); 959 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 960 assert(element_klass != NULL, "Must have an element klass"); 961 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 962 } 963 assert(comp_mirror() != NULL, "must have a mirror"); 964 965 // Two-way link between the array klass and its component mirror: 966 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 967 set_component_mirror(mirror(), comp_mirror()); 968 // See below for ordering dependencies between field array_klass in component mirror 969 // and java_mirror in this klass. 970 } else { 971 assert(k->is_instance_klass(), "Must be"); 972 973 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 974 if (HAS_PENDING_EXCEPTION) { 975 // If any of the fields throws an exception like OOM remove the klass field 976 // from the mirror so GC doesn't follow it after the klass has been deallocated. 977 // This mirror looks like a primitive type, which logically it is because it 978 // it represents no class. 979 java_lang_Class::set_klass(mirror(), NULL); 980 return; 981 } 982 } 983 984 // set the classLoader field in the java_lang_Class instance 985 assert(class_loader() == k->class_loader(), "should be same"); 986 set_class_loader(mirror(), class_loader()); 987 988 // Setup indirection from klass->mirror 989 // after any exceptions can happen during allocations. 990 k->set_java_mirror(mirror); 991 992 // Set the module field in the java_lang_Class instance. This must be done 993 // after the mirror is set. 994 set_mirror_module_field(k, mirror, module, THREAD); 995 996 if (comp_mirror() != NULL) { 997 // Set after k->java_mirror() is published, because compiled code running 998 // concurrently doesn't expect a k to have a null java_mirror. 999 release_set_array_klass(comp_mirror(), k); 1000 } 1001 } else { 1002 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized"); 1003 fixup_mirror_list()->push(k); 1004 } 1005 } 1006 1007 #if INCLUDE_CDS_JAVA_HEAP 1008 // Clears mirror fields. Static final fields with initial values are reloaded 1009 // from constant pool. The object identity hash is in the object header and is 1010 // not affected. 1011 class ResetMirrorField: public FieldClosure { 1012 private: 1013 Handle _m; 1014 1015 public: 1016 ResetMirrorField(Handle mirror) : _m(mirror) {} 1017 1018 void do_field(fieldDescriptor* fd) { 1019 assert(DumpSharedSpaces, "dump time only"); 1020 assert(_m.not_null(), "Mirror cannot be NULL"); 1021 1022 if (fd->is_static() && fd->has_initial_value()) { 1023 initialize_static_field(fd, _m, Thread::current()); 1024 return; 1025 } 1026 1027 BasicType ft = fd->field_type(); 1028 switch (ft) { 1029 case T_BYTE: 1030 _m()->byte_field_put(fd->offset(), 0); 1031 break; 1032 case T_CHAR: 1033 _m()->char_field_put(fd->offset(), 0); 1034 break; 1035 case T_DOUBLE: 1036 _m()->double_field_put(fd->offset(), 0); 1037 break; 1038 case T_FLOAT: 1039 _m()->float_field_put(fd->offset(), 0); 1040 break; 1041 case T_INT: 1042 _m()->int_field_put(fd->offset(), 0); 1043 break; 1044 case T_LONG: 1045 _m()->long_field_put(fd->offset(), 0); 1046 break; 1047 case T_SHORT: 1048 _m()->short_field_put(fd->offset(), 0); 1049 break; 1050 case T_BOOLEAN: 1051 _m()->bool_field_put(fd->offset(), false); 1052 break; 1053 case T_ARRAY: 1054 case T_OBJECT: { 1055 // It might be useful to cache the String field, but 1056 // for now just clear out any reference field 1057 oop o = _m()->obj_field(fd->offset()); 1058 _m()->obj_field_put(fd->offset(), NULL); 1059 break; 1060 } 1061 default: 1062 ShouldNotReachHere(); 1063 break; 1064 } 1065 } 1066 }; 1067 1068 void java_lang_Class::archive_basic_type_mirrors(TRAPS) { 1069 assert(HeapShared::is_heap_object_archiving_allowed(), 1070 "HeapShared::is_heap_object_archiving_allowed() must be true"); 1071 1072 for (int t = 0; t <= T_VOID; t++) { 1073 oop m = Universe::_mirrors[t]; 1074 if (m != NULL) { 1075 // Update the field at _array_klass_offset to point to the relocated array klass. 1076 oop archived_m = HeapShared::archive_heap_object(m, THREAD); 1077 assert(archived_m != NULL, "sanity"); 1078 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset)); 1079 assert(ak != NULL || t == T_VOID, "should not be NULL"); 1080 if (ak != NULL) { 1081 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak, true); 1082 archived_m->metadata_field_put(_array_klass_offset, reloc_ak); 1083 } 1084 1085 // Clear the fields. Just to be safe 1086 Klass *k = m->klass(); 1087 Handle archived_mirror_h(THREAD, archived_m); 1088 ResetMirrorField reset(archived_mirror_h); 1089 InstanceKlass::cast(k)->do_nonstatic_fields(&reset); 1090 1091 log_trace(cds, heap, mirror)( 1092 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1093 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m)); 1094 1095 Universe::_mirrors[t] = archived_m; 1096 } 1097 } 1098 1099 assert(Universe::_mirrors[T_INT] != NULL && 1100 Universe::_mirrors[T_FLOAT] != NULL && 1101 Universe::_mirrors[T_DOUBLE] != NULL && 1102 Universe::_mirrors[T_BYTE] != NULL && 1103 Universe::_mirrors[T_BOOLEAN] != NULL && 1104 Universe::_mirrors[T_CHAR] != NULL && 1105 Universe::_mirrors[T_LONG] != NULL && 1106 Universe::_mirrors[T_SHORT] != NULL && 1107 Universe::_mirrors[T_VOID] != NULL, "sanity"); 1108 1109 Universe::set_int_mirror(Universe::_mirrors[T_INT]); 1110 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]); 1111 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]); 1112 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]); 1113 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]); 1114 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]); 1115 Universe::set_long_mirror(Universe::_mirrors[T_LONG]); 1116 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]); 1117 Universe::set_void_mirror(Universe::_mirrors[T_VOID]); 1118 } 1119 1120 // 1121 // After the mirror object is successfully archived, the archived 1122 // klass is set with _has_archived_raw_mirror flag. 1123 // 1124 // The _has_archived_raw_mirror flag is cleared at runtime when the 1125 // archived mirror is restored. If archived java heap data cannot 1126 // be used at runtime, new mirror object is created for the shared 1127 // class. The _has_archived_raw_mirror is cleared also during the process. 1128 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) { 1129 assert(HeapShared::is_heap_object_archiving_allowed(), 1130 "HeapShared::is_heap_object_archiving_allowed() must be true"); 1131 1132 // Mirror is already archived 1133 if (k->has_raw_archived_mirror()) { 1134 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror"); 1135 return k->archived_java_mirror_raw(); 1136 } 1137 1138 // No mirror 1139 oop mirror = k->java_mirror(); 1140 if (mirror == NULL) { 1141 return NULL; 1142 } 1143 1144 if (k->is_instance_klass()) { 1145 InstanceKlass *ik = InstanceKlass::cast(k); 1146 assert(ik->signers() == NULL, "class with signer should have been excluded"); 1147 1148 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() || 1149 ik->is_shared_app_class())) { 1150 // Archiving mirror for classes from non-builtin loaders is not 1151 // supported. Clear the _java_mirror within the archived class. 1152 k->set_java_mirror_handle(NULL); 1153 return NULL; 1154 } 1155 } 1156 1157 // Now start archiving the mirror object 1158 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD); 1159 if (archived_mirror == NULL) { 1160 return NULL; 1161 } 1162 1163 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD); 1164 if (archived_mirror == NULL) { 1165 return NULL; 1166 } 1167 1168 k->set_archived_java_mirror_raw(archived_mirror); 1169 1170 k->set_has_raw_archived_mirror(); 1171 1172 ResourceMark rm; 1173 log_trace(cds, heap, mirror)( 1174 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1175 k->external_name(), p2i(mirror), p2i(archived_mirror)); 1176 1177 return archived_mirror; 1178 } 1179 1180 // The process is based on create_mirror(). 1181 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror, 1182 oop archived_mirror, 1183 Thread *THREAD) { 1184 // Clear nonstatic fields in archived mirror. Some of the fields will be set 1185 // to archived metadata and objects below. 1186 Klass *c = archived_mirror->klass(); 1187 Handle archived_mirror_h(THREAD, archived_mirror); 1188 ResetMirrorField reset(archived_mirror_h); 1189 InstanceKlass::cast(c)->do_nonstatic_fields(&reset); 1190 1191 if (k->is_array_klass()) { 1192 oop archived_comp_mirror; 1193 if (k->is_typeArray_klass()) { 1194 // The primitive type mirrors are already archived. Get the archived mirror. 1195 oop comp_mirror = java_lang_Class::component_mirror(mirror); 1196 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror); 1197 assert(archived_comp_mirror != NULL, "Must be"); 1198 } else { 1199 assert(k->is_objArray_klass(), "Must be"); 1200 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1201 assert(element_klass != NULL, "Must have an element klass"); 1202 archived_comp_mirror = archive_mirror(element_klass, THREAD); 1203 if (archived_comp_mirror == NULL) { 1204 return NULL; 1205 } 1206 } 1207 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror); 1208 } else { 1209 assert(k->is_instance_klass(), "Must be"); 1210 1211 // Reset local static fields in the mirror 1212 InstanceKlass::cast(k)->do_local_static_fields(&reset); 1213 1214 java_lang_Class:set_init_lock(archived_mirror, NULL); 1215 1216 set_protection_domain(archived_mirror, NULL); 1217 } 1218 1219 // clear class loader and mirror_module_field 1220 set_class_loader(archived_mirror, NULL); 1221 set_module(archived_mirror, NULL); 1222 1223 // The archived mirror's field at _klass_offset is still pointing to the original 1224 // klass. Updated the field in the archived mirror to point to the relocated 1225 // klass in the archive. 1226 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror), true); 1227 log_debug(cds, heap, mirror)( 1228 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1229 p2i(as_Klass(mirror)), p2i(reloc_k)); 1230 archived_mirror->metadata_field_put(_klass_offset, reloc_k); 1231 1232 // The field at _array_klass_offset is pointing to the original one dimension 1233 // higher array klass if exists. Relocate the pointer. 1234 Klass *arr = array_klass_acquire(mirror); 1235 if (arr != NULL) { 1236 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr, true); 1237 log_debug(cds, heap, mirror)( 1238 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1239 p2i(arr), p2i(reloc_arr)); 1240 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr); 1241 } 1242 return archived_mirror; 1243 } 1244 1245 void java_lang_Class::update_archived_primitive_mirror_native_pointers(oop archived_mirror) { 1246 if (MetaspaceShared::relocation_delta() != 0) { 1247 assert(archived_mirror->metadata_field(_klass_offset) == NULL, "must be for primitive class"); 1248 1249 Klass* ak = ((Klass*)archived_mirror->metadata_field(_array_klass_offset)); 1250 if (ak != NULL) { 1251 archived_mirror->metadata_field_put(_array_klass_offset, 1252 (Klass*)(address(ak) + MetaspaceShared::relocation_delta())); 1253 } 1254 } 1255 } 1256 1257 void java_lang_Class::update_archived_mirror_native_pointers(oop archived_mirror) { 1258 if (MetaspaceShared::relocation_delta() != 0) { 1259 Klass* k = ((Klass*)archived_mirror->metadata_field(_klass_offset)); 1260 archived_mirror->metadata_field_put(_klass_offset, 1261 (Klass*)(address(k) + MetaspaceShared::relocation_delta())); 1262 1263 Klass* ak = ((Klass*)archived_mirror->metadata_field(_array_klass_offset)); 1264 if (ak != NULL) { 1265 archived_mirror->metadata_field_put(_array_klass_offset, 1266 (Klass*)(address(ak) + MetaspaceShared::relocation_delta())); 1267 } 1268 } 1269 } 1270 1271 1272 // Returns true if the mirror is updated, false if no archived mirror 1273 // data is present. After the archived mirror object is restored, the 1274 // shared klass' _has_raw_archived_mirror flag is cleared. 1275 bool java_lang_Class::restore_archived_mirror(Klass *k, 1276 Handle class_loader, Handle module, 1277 Handle protection_domain, TRAPS) { 1278 // Postpone restoring archived mirror until java.lang.Class is loaded. Please 1279 // see more details in SystemDictionary::resolve_well_known_classes(). 1280 if (!SystemDictionary::Class_klass_loaded()) { 1281 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized"); 1282 fixup_mirror_list()->push(k); 1283 return true; 1284 } 1285 1286 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow()); 1287 if (m == NULL) { 1288 return false; 1289 } 1290 1291 // mirror is archived, restore 1292 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m)); 1293 assert(HeapShared::is_archived_object(m), "must be archived mirror object"); 1294 update_archived_mirror_native_pointers(m); 1295 assert(as_Klass(m) == k, "must be"); 1296 Handle mirror(THREAD, m); 1297 1298 if (!k->is_array_klass()) { 1299 // - local static final fields with initial values were initialized at dump time 1300 1301 // create the init_lock 1302 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false)); 1303 set_init_lock(mirror(), r); 1304 1305 if (protection_domain.not_null()) { 1306 set_protection_domain(mirror(), protection_domain()); 1307 } 1308 } 1309 1310 assert(class_loader() == k->class_loader(), "should be same"); 1311 if (class_loader.not_null()) { 1312 set_class_loader(mirror(), class_loader()); 1313 } 1314 1315 k->set_java_mirror(mirror); 1316 k->clear_has_raw_archived_mirror(); 1317 1318 set_mirror_module_field(k, mirror, module, THREAD); 1319 1320 if (log_is_enabled(Trace, cds, heap, mirror)) { 1321 ResourceMark rm(THREAD); 1322 log_trace(cds, heap, mirror)( 1323 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1324 } 1325 1326 return true; 1327 } 1328 #endif // INCLUDE_CDS_JAVA_HEAP 1329 1330 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1331 assert(_module_offset != 0, "must have been computed already"); 1332 java_lang_Class::set_module(k->java_mirror(), module()); 1333 } 1334 1335 int java_lang_Class::oop_size(oop java_class) { 1336 assert(_oop_size_offset != 0, "must be set"); 1337 int size = java_class->int_field(_oop_size_offset); 1338 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1339 return size; 1340 } 1341 1342 1343 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) { 1344 assert(_oop_size_offset != 0, "must be set"); 1345 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1346 *(int*)(((char*)java_class) + _oop_size_offset) = size; 1347 } 1348 1349 int java_lang_Class::static_oop_field_count(oop java_class) { 1350 assert(_static_oop_field_count_offset != 0, "must be set"); 1351 return java_class->int_field(_static_oop_field_count_offset); 1352 } 1353 1354 int java_lang_Class::static_oop_field_count_raw(oop java_class) { 1355 assert(_static_oop_field_count_offset != 0, "must be set"); 1356 return java_class->int_field_raw(_static_oop_field_count_offset); 1357 } 1358 1359 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1360 assert(_static_oop_field_count_offset != 0, "must be set"); 1361 java_class->int_field_put(_static_oop_field_count_offset, size); 1362 } 1363 1364 oop java_lang_Class::protection_domain(oop java_class) { 1365 assert(_protection_domain_offset != 0, "must be set"); 1366 return java_class->obj_field(_protection_domain_offset); 1367 } 1368 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1369 assert(_protection_domain_offset != 0, "must be set"); 1370 java_class->obj_field_put(_protection_domain_offset, pd); 1371 } 1372 1373 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1374 assert(_component_mirror_offset != 0, "must be set"); 1375 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1376 } 1377 oop java_lang_Class::component_mirror(oop java_class) { 1378 assert(_component_mirror_offset != 0, "must be set"); 1379 return java_class->obj_field(_component_mirror_offset); 1380 } 1381 1382 oop java_lang_Class::init_lock(oop java_class) { 1383 assert(_init_lock_offset != 0, "must be set"); 1384 return java_class->obj_field(_init_lock_offset); 1385 } 1386 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 1387 assert(_init_lock_offset != 0, "must be set"); 1388 java_class->obj_field_put(_init_lock_offset, init_lock); 1389 } 1390 1391 objArrayOop java_lang_Class::signers(oop java_class) { 1392 assert(_signers_offset != 0, "must be set"); 1393 return (objArrayOop)java_class->obj_field(_signers_offset); 1394 } 1395 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 1396 assert(_signers_offset != 0, "must be set"); 1397 java_class->obj_field_put(_signers_offset, (oop)signers); 1398 } 1399 1400 1401 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1402 assert(_class_loader_offset != 0, "offsets should have been initialized"); 1403 java_class->obj_field_put(_class_loader_offset, loader); 1404 } 1405 1406 oop java_lang_Class::class_loader(oop java_class) { 1407 assert(_class_loader_offset != 0, "must be set"); 1408 return java_class->obj_field(_class_loader_offset); 1409 } 1410 1411 oop java_lang_Class::module(oop java_class) { 1412 assert(_module_offset != 0, "must be set"); 1413 return java_class->obj_field(_module_offset); 1414 } 1415 1416 void java_lang_Class::set_module(oop java_class, oop module) { 1417 assert(_module_offset != 0, "must be set"); 1418 java_class->obj_field_put(_module_offset, module); 1419 } 1420 1421 oop java_lang_Class::name(Handle java_class, TRAPS) { 1422 assert(_name_offset != 0, "must be set"); 1423 oop o = java_class->obj_field(_name_offset); 1424 if (o == NULL) { 1425 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD); 1426 java_class->obj_field_put(_name_offset, o); 1427 } 1428 return o; 1429 } 1430 1431 oop java_lang_Class::source_file(oop java_class) { 1432 assert(_source_file_offset != 0, "must be set"); 1433 return java_class->obj_field(_source_file_offset); 1434 } 1435 1436 void java_lang_Class::set_source_file(oop java_class, oop source_file) { 1437 assert(_source_file_offset != 0, "must be set"); 1438 java_class->obj_field_put(_source_file_offset, source_file); 1439 } 1440 1441 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1442 // This should be improved by adding a field at the Java level or by 1443 // introducing a new VM klass (see comment in ClassFileParser) 1444 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_NULL); 1445 if (type != T_VOID) { 1446 Klass* aklass = Universe::typeArrayKlassObj(type); 1447 assert(aklass != NULL, "correct bootstrap"); 1448 release_set_array_klass(java_class, aklass); 1449 } 1450 #ifdef ASSERT 1451 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 1452 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1453 #endif 1454 return java_class; 1455 } 1456 1457 1458 Klass* java_lang_Class::as_Klass(oop java_class) { 1459 //%note memory_2 1460 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1461 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 1462 assert(k == NULL || k->is_klass(), "type check"); 1463 return k; 1464 } 1465 1466 Klass* java_lang_Class::as_Klass_raw(oop java_class) { 1467 //%note memory_2 1468 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1469 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset)); 1470 assert(k == NULL || k->is_klass(), "type check"); 1471 return k; 1472 } 1473 1474 1475 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1476 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1477 java_class->metadata_field_put(_klass_offset, klass); 1478 } 1479 1480 1481 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1482 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1483 Symbol* name = NULL; 1484 bool is_instance = false; 1485 if (is_primitive(java_class)) { 1486 name = vmSymbols::type_signature(primitive_type(java_class)); 1487 } else { 1488 Klass* k = as_Klass(java_class); 1489 is_instance = k->is_instance_klass(); 1490 name = k->name(); 1491 } 1492 if (name == NULL) { 1493 st->print("<null>"); 1494 return; 1495 } 1496 if (is_instance) st->print("L"); 1497 st->write((char*) name->base(), (int) name->utf8_length()); 1498 if (is_instance) st->print(";"); 1499 } 1500 1501 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) { 1502 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1503 Symbol* name; 1504 if (is_primitive(java_class)) { 1505 name = vmSymbols::type_signature(primitive_type(java_class)); 1506 // Because this can create a new symbol, the caller has to decrement 1507 // the refcount, so make adjustment here and below for symbols returned 1508 // that are not created or incremented due to a successful lookup. 1509 name->increment_refcount(); 1510 } else { 1511 Klass* k = as_Klass(java_class); 1512 if (!k->is_instance_klass()) { 1513 name = k->name(); 1514 name->increment_refcount(); 1515 } else { 1516 ResourceMark rm; 1517 const char* sigstr = k->signature_name(); 1518 int siglen = (int) strlen(sigstr); 1519 if (!intern_if_not_found) { 1520 name = SymbolTable::probe(sigstr, siglen); 1521 } else { 1522 name = SymbolTable::new_symbol(sigstr, siglen); 1523 } 1524 } 1525 } 1526 return name; 1527 } 1528 1529 // Returns the Java name for this Java mirror (Resource allocated) 1530 // See Klass::external_name(). 1531 // For primitive type Java mirrors, its type name is returned. 1532 const char* java_lang_Class::as_external_name(oop java_class) { 1533 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1534 const char* name = NULL; 1535 if (is_primitive(java_class)) { 1536 name = type2name(primitive_type(java_class)); 1537 } else { 1538 name = as_Klass(java_class)->external_name(); 1539 } 1540 if (name == NULL) { 1541 name = "<null>"; 1542 } 1543 return name; 1544 } 1545 1546 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1547 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1548 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass"); 1549 return k; 1550 } 1551 1552 1553 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1554 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1555 java_class->release_metadata_field_put(_array_klass_offset, klass); 1556 } 1557 1558 1559 BasicType java_lang_Class::primitive_type(oop java_class) { 1560 assert(java_lang_Class::is_primitive(java_class), "just checking"); 1561 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1562 BasicType type = T_VOID; 1563 if (ak != NULL) { 1564 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1565 type = ArrayKlass::cast(ak)->element_type(); 1566 } else { 1567 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1568 } 1569 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1570 return type; 1571 } 1572 1573 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1574 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1575 if (is_primitive(java_class)) { 1576 if (reference_klass != NULL) 1577 (*reference_klass) = NULL; 1578 return primitive_type(java_class); 1579 } else { 1580 if (reference_klass != NULL) 1581 (*reference_klass) = as_Klass(java_class); 1582 return T_OBJECT; 1583 } 1584 } 1585 1586 1587 oop java_lang_Class::primitive_mirror(BasicType t) { 1588 oop mirror = Universe::java_mirror(t); 1589 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 1590 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 1591 return mirror; 1592 } 1593 1594 bool java_lang_Class::offsets_computed = false; 1595 int java_lang_Class::classRedefinedCount_offset = -1; 1596 1597 #define CLASS_FIELDS_DO(macro) \ 1598 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \ 1599 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1600 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1601 macro(_module_offset, k, "module", module_signature, false); \ 1602 macro(_name_offset, k, "name", string_signature, false); \ 1603 1604 void java_lang_Class::compute_offsets() { 1605 if (offsets_computed) { 1606 return; 1607 } 1608 1609 offsets_computed = true; 1610 1611 InstanceKlass* k = SystemDictionary::Class_klass(); 1612 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1613 1614 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 1615 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 1616 // GC treats them the same. 1617 _init_lock_offset = _component_mirror_offset; 1618 1619 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1620 } 1621 1622 #if INCLUDE_CDS 1623 void java_lang_Class::serialize_offsets(SerializeClosure* f) { 1624 f->do_bool(&offsets_computed); 1625 f->do_u4((u4*)&_init_lock_offset); 1626 1627 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1628 1629 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1630 } 1631 #endif 1632 1633 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1634 assert(classRedefinedCount_offset != -1, "offsets should have been initialized"); 1635 return the_class_mirror->int_field(classRedefinedCount_offset); 1636 } 1637 1638 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1639 assert(classRedefinedCount_offset != -1, "offsets should have been initialized"); 1640 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 1641 } 1642 1643 1644 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1645 // platform thread structure, and a eetop offset which was used for thread 1646 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1647 // merged, so in the HotSpot VM we just use the eetop field for the thread 1648 // instead of the privateInfo_offset. 1649 // 1650 // Note: The stackSize field is only present starting in 1.4. 1651 1652 int java_lang_Thread::_name_offset = 0; 1653 int java_lang_Thread::_group_offset = 0; 1654 int java_lang_Thread::_contextClassLoader_offset = 0; 1655 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 1656 int java_lang_Thread::_priority_offset = 0; 1657 int java_lang_Thread::_eetop_offset = 0; 1658 int java_lang_Thread::_interrupted_offset = 0; 1659 int java_lang_Thread::_daemon_offset = 0; 1660 int java_lang_Thread::_stillborn_offset = 0; 1661 int java_lang_Thread::_stackSize_offset = 0; 1662 int java_lang_Thread::_tid_offset = 0; 1663 int java_lang_Thread::_thread_status_offset = 0; 1664 int java_lang_Thread::_park_blocker_offset = 0; 1665 1666 #define THREAD_FIELDS_DO(macro) \ 1667 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1668 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1669 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \ 1670 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \ 1671 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1672 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1673 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1674 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \ 1675 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \ 1676 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1677 macro(_tid_offset, k, "tid", long_signature, false); \ 1678 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \ 1679 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false) 1680 1681 void java_lang_Thread::compute_offsets() { 1682 assert(_group_offset == 0, "offsets should be initialized only once"); 1683 1684 InstanceKlass* k = SystemDictionary::Thread_klass(); 1685 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1686 } 1687 1688 #if INCLUDE_CDS 1689 void java_lang_Thread::serialize_offsets(SerializeClosure* f) { 1690 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1691 } 1692 #endif 1693 1694 JavaThread* java_lang_Thread::thread(oop java_thread) { 1695 return (JavaThread*)java_thread->address_field(_eetop_offset); 1696 } 1697 1698 1699 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1700 java_thread->address_field_put(_eetop_offset, (address)thread); 1701 } 1702 1703 bool java_lang_Thread::interrupted(oop java_thread) { 1704 // Make sure the caller can safely access oops. 1705 assert(Thread::current()->is_VM_thread() || 1706 (JavaThread::current()->thread_state() != _thread_blocked && 1707 JavaThread::current()->thread_state() != _thread_in_native), 1708 "Unsafe access to oop"); 1709 return java_thread->bool_field_volatile(_interrupted_offset); 1710 } 1711 1712 void java_lang_Thread::set_interrupted(oop java_thread, bool val) { 1713 // Make sure the caller can safely access oops. 1714 assert(Thread::current()->is_VM_thread() || 1715 (JavaThread::current()->thread_state() != _thread_blocked && 1716 JavaThread::current()->thread_state() != _thread_in_native), 1717 "Unsafe access to oop"); 1718 java_thread->bool_field_put_volatile(_interrupted_offset, val); 1719 } 1720 1721 1722 oop java_lang_Thread::name(oop java_thread) { 1723 return java_thread->obj_field(_name_offset); 1724 } 1725 1726 1727 void java_lang_Thread::set_name(oop java_thread, oop name) { 1728 java_thread->obj_field_put(_name_offset, name); 1729 } 1730 1731 1732 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1733 return (ThreadPriority)java_thread->int_field(_priority_offset); 1734 } 1735 1736 1737 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1738 java_thread->int_field_put(_priority_offset, priority); 1739 } 1740 1741 1742 oop java_lang_Thread::threadGroup(oop java_thread) { 1743 return java_thread->obj_field(_group_offset); 1744 } 1745 1746 1747 bool java_lang_Thread::is_stillborn(oop java_thread) { 1748 return java_thread->bool_field(_stillborn_offset) != 0; 1749 } 1750 1751 1752 // We never have reason to turn the stillborn bit off 1753 void java_lang_Thread::set_stillborn(oop java_thread) { 1754 java_thread->bool_field_put(_stillborn_offset, true); 1755 } 1756 1757 1758 bool java_lang_Thread::is_alive(oop java_thread) { 1759 JavaThread* thr = java_lang_Thread::thread(java_thread); 1760 return (thr != NULL); 1761 } 1762 1763 1764 bool java_lang_Thread::is_daemon(oop java_thread) { 1765 return java_thread->bool_field(_daemon_offset) != 0; 1766 } 1767 1768 1769 void java_lang_Thread::set_daemon(oop java_thread) { 1770 java_thread->bool_field_put(_daemon_offset, true); 1771 } 1772 1773 oop java_lang_Thread::context_class_loader(oop java_thread) { 1774 return java_thread->obj_field(_contextClassLoader_offset); 1775 } 1776 1777 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1778 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1779 } 1780 1781 1782 jlong java_lang_Thread::stackSize(oop java_thread) { 1783 return java_thread->long_field(_stackSize_offset); 1784 } 1785 1786 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1787 void java_lang_Thread::set_thread_status(oop java_thread, 1788 java_lang_Thread::ThreadStatus status) { 1789 java_thread->int_field_put(_thread_status_offset, status); 1790 } 1791 1792 // Read thread status value from threadStatus field in java.lang.Thread java class. 1793 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1794 // Make sure the caller is operating on behalf of the VM or is 1795 // running VM code (state == _thread_in_vm). 1796 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1797 JavaThread::current()->thread_state() == _thread_in_vm, 1798 "Java Thread is not running in vm"); 1799 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1800 } 1801 1802 1803 jlong java_lang_Thread::thread_id(oop java_thread) { 1804 return java_thread->long_field(_tid_offset); 1805 } 1806 1807 oop java_lang_Thread::park_blocker(oop java_thread) { 1808 return java_thread->obj_field(_park_blocker_offset); 1809 } 1810 1811 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1812 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1813 switch (status) { 1814 case NEW : return "NEW"; 1815 case RUNNABLE : return "RUNNABLE"; 1816 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1817 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1818 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1819 case PARKED : return "WAITING (parking)"; 1820 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1821 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1822 case TERMINATED : return "TERMINATED"; 1823 default : return "UNKNOWN"; 1824 }; 1825 } 1826 int java_lang_ThreadGroup::_parent_offset = 0; 1827 int java_lang_ThreadGroup::_name_offset = 0; 1828 int java_lang_ThreadGroup::_threads_offset = 0; 1829 int java_lang_ThreadGroup::_groups_offset = 0; 1830 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1831 int java_lang_ThreadGroup::_destroyed_offset = 0; 1832 int java_lang_ThreadGroup::_daemon_offset = 0; 1833 int java_lang_ThreadGroup::_nthreads_offset = 0; 1834 int java_lang_ThreadGroup::_ngroups_offset = 0; 1835 1836 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1837 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1838 return java_thread_group->obj_field(_parent_offset); 1839 } 1840 1841 // ("name as oop" accessor is not necessary) 1842 1843 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1844 oop name = java_thread_group->obj_field(_name_offset); 1845 // ThreadGroup.name can be null 1846 if (name != NULL) { 1847 return java_lang_String::as_utf8_string(name); 1848 } 1849 return NULL; 1850 } 1851 1852 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1853 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1854 return java_thread_group->int_field(_nthreads_offset); 1855 } 1856 1857 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1858 oop threads = java_thread_group->obj_field(_threads_offset); 1859 assert(threads != NULL, "threadgroups should have threads"); 1860 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1861 return objArrayOop(threads); 1862 } 1863 1864 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1865 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1866 return java_thread_group->int_field(_ngroups_offset); 1867 } 1868 1869 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1870 oop groups = java_thread_group->obj_field(_groups_offset); 1871 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1872 return objArrayOop(groups); 1873 } 1874 1875 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1876 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1877 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1878 } 1879 1880 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1881 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1882 return java_thread_group->bool_field(_destroyed_offset) != 0; 1883 } 1884 1885 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1886 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1887 return java_thread_group->bool_field(_daemon_offset) != 0; 1888 } 1889 1890 #define THREADGROUP_FIELDS_DO(macro) \ 1891 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \ 1892 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1893 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \ 1894 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \ 1895 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \ 1896 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \ 1897 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1898 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \ 1899 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false) 1900 1901 void java_lang_ThreadGroup::compute_offsets() { 1902 assert(_parent_offset == 0, "offsets should be initialized only once"); 1903 1904 InstanceKlass* k = SystemDictionary::ThreadGroup_klass(); 1905 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1906 } 1907 1908 #if INCLUDE_CDS 1909 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) { 1910 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1911 } 1912 #endif 1913 1914 #define THROWABLE_FIELDS_DO(macro) \ 1915 macro(backtrace_offset, k, "backtrace", object_signature, false); \ 1916 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \ 1917 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 1918 macro(depth_offset, k, "depth", int_signature, false); \ 1919 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 1920 1921 void java_lang_Throwable::compute_offsets() { 1922 InstanceKlass* k = SystemDictionary::Throwable_klass(); 1923 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1924 } 1925 1926 #if INCLUDE_CDS 1927 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) { 1928 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1929 } 1930 #endif 1931 1932 oop java_lang_Throwable::unassigned_stacktrace() { 1933 InstanceKlass* ik = SystemDictionary::Throwable_klass(); 1934 oop base = ik->static_field_base_raw(); 1935 return base->obj_field(static_unassigned_stacktrace_offset); 1936 } 1937 1938 oop java_lang_Throwable::backtrace(oop throwable) { 1939 return throwable->obj_field_acquire(backtrace_offset); 1940 } 1941 1942 1943 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1944 throwable->release_obj_field_put(backtrace_offset, value); 1945 } 1946 1947 int java_lang_Throwable::depth(oop throwable) { 1948 return throwable->int_field(depth_offset); 1949 } 1950 1951 void java_lang_Throwable::set_depth(oop throwable, int value) { 1952 throwable->int_field_put(depth_offset, value); 1953 } 1954 1955 oop java_lang_Throwable::message(oop throwable) { 1956 return throwable->obj_field(detailMessage_offset); 1957 } 1958 1959 1960 // Return Symbol for detailed_message or NULL 1961 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1962 PRESERVE_EXCEPTION_MARK; // Keep original exception 1963 oop detailed_message = java_lang_Throwable::message(throwable); 1964 if (detailed_message != NULL) { 1965 return java_lang_String::as_symbol(detailed_message); 1966 } 1967 return NULL; 1968 } 1969 1970 void java_lang_Throwable::set_message(oop throwable, oop value) { 1971 throwable->obj_field_put(detailMessage_offset, value); 1972 } 1973 1974 1975 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1976 throwable->obj_field_put(stackTrace_offset, st_element_array); 1977 } 1978 1979 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1980 set_stacktrace(throwable, NULL); 1981 } 1982 1983 1984 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1985 ResourceMark rm; 1986 Klass* k = throwable->klass(); 1987 assert(k != NULL, "just checking"); 1988 st->print("%s", k->external_name()); 1989 oop msg = message(throwable); 1990 if (msg != NULL) { 1991 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1992 } 1993 } 1994 1995 // After this many redefines, the stack trace is unreliable. 1996 const int MAX_VERSION = USHRT_MAX; 1997 1998 static inline bool version_matches(Method* method, int version) { 1999 assert(version < MAX_VERSION, "version is too big"); 2000 return method != NULL && (method->constants()->version() == version); 2001 } 2002 2003 // This class provides a simple wrapper over the internal structure of 2004 // exception backtrace to insulate users of the backtrace from needing 2005 // to know what it looks like. 2006 // The code of this class is not GC safe. Allocations can only happen 2007 // in expand(). 2008 class BacktraceBuilder: public StackObj { 2009 friend class BacktraceIterator; 2010 private: 2011 Handle _backtrace; 2012 objArrayOop _head; 2013 typeArrayOop _methods; 2014 typeArrayOop _bcis; 2015 objArrayOop _mirrors; 2016 typeArrayOop _names; // Needed to insulate method name against redefinition. 2017 // True if the top frame of the backtrace is omitted because it shall be hidden. 2018 bool _has_hidden_top_frame; 2019 int _index; 2020 NoSafepointVerifier _nsv; 2021 2022 enum { 2023 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 2024 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 2025 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 2026 trace_names_offset = java_lang_Throwable::trace_names_offset, 2027 trace_next_offset = java_lang_Throwable::trace_next_offset, 2028 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset, 2029 trace_size = java_lang_Throwable::trace_size, 2030 trace_chunk_size = java_lang_Throwable::trace_chunk_size 2031 }; 2032 2033 // get info out of chunks 2034 static typeArrayOop get_methods(objArrayHandle chunk) { 2035 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 2036 assert(methods != NULL, "method array should be initialized in backtrace"); 2037 return methods; 2038 } 2039 static typeArrayOop get_bcis(objArrayHandle chunk) { 2040 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 2041 assert(bcis != NULL, "bci array should be initialized in backtrace"); 2042 return bcis; 2043 } 2044 static objArrayOop get_mirrors(objArrayHandle chunk) { 2045 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 2046 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 2047 return mirrors; 2048 } 2049 static typeArrayOop get_names(objArrayHandle chunk) { 2050 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 2051 assert(names != NULL, "names array should be initialized in backtrace"); 2052 return names; 2053 } 2054 static bool has_hidden_top_frame(objArrayHandle chunk) { 2055 oop hidden = chunk->obj_at(trace_hidden_offset); 2056 return hidden != NULL; 2057 } 2058 2059 public: 2060 2061 // constructor for new backtrace 2062 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL), _has_hidden_top_frame(false) { 2063 expand(CHECK); 2064 _backtrace = Handle(THREAD, _head); 2065 _index = 0; 2066 } 2067 2068 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 2069 _methods = get_methods(backtrace); 2070 _bcis = get_bcis(backtrace); 2071 _mirrors = get_mirrors(backtrace); 2072 _names = get_names(backtrace); 2073 _has_hidden_top_frame = has_hidden_top_frame(backtrace); 2074 assert(_methods->length() == _bcis->length() && 2075 _methods->length() == _mirrors->length() && 2076 _mirrors->length() == _names->length(), 2077 "method and source information arrays should match"); 2078 2079 // head is the preallocated backtrace 2080 _head = backtrace(); 2081 _backtrace = Handle(thread, _head); 2082 _index = 0; 2083 } 2084 2085 void expand(TRAPS) { 2086 objArrayHandle old_head(THREAD, _head); 2087 PauseNoSafepointVerifier pnsv(&_nsv); 2088 2089 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2090 objArrayHandle new_head(THREAD, head); 2091 2092 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2093 typeArrayHandle new_methods(THREAD, methods); 2094 2095 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2096 typeArrayHandle new_bcis(THREAD, bcis); 2097 2098 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2099 objArrayHandle new_mirrors(THREAD, mirrors); 2100 2101 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2102 typeArrayHandle new_names(THREAD, names); 2103 2104 if (!old_head.is_null()) { 2105 old_head->obj_at_put(trace_next_offset, new_head()); 2106 } 2107 new_head->obj_at_put(trace_methods_offset, new_methods()); 2108 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2109 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2110 new_head->obj_at_put(trace_names_offset, new_names()); 2111 new_head->obj_at_put(trace_hidden_offset, NULL); 2112 2113 _head = new_head(); 2114 _methods = new_methods(); 2115 _bcis = new_bcis(); 2116 _mirrors = new_mirrors(); 2117 _names = new_names(); 2118 _index = 0; 2119 } 2120 2121 oop backtrace() { 2122 return _backtrace(); 2123 } 2124 2125 inline void push(Method* method, int bci, TRAPS) { 2126 // Smear the -1 bci to 0 since the array only holds unsigned 2127 // shorts. The later line number lookup would just smear the -1 2128 // to a 0 even if it could be recorded. 2129 if (bci == SynchronizationEntryBCI) bci = 0; 2130 2131 if (_index >= trace_chunk_size) { 2132 methodHandle mhandle(THREAD, method); 2133 expand(CHECK); 2134 method = mhandle(); 2135 } 2136 2137 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2138 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2139 2140 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2141 // klass owning the symbols alive so their refcounts aren't decremented. 2142 Symbol* name = method->name(); 2143 _names->symbol_at_put(_index, name); 2144 2145 // We need to save the mirrors in the backtrace to keep the class 2146 // from being unloaded while we still have this stack trace. 2147 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 2148 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2149 _index++; 2150 } 2151 2152 void set_has_hidden_top_frame(TRAPS) { 2153 if (!_has_hidden_top_frame) { 2154 // It would be nice to add java/lang/Boolean::TRUE here 2155 // to indicate that this backtrace has a hidden top frame. 2156 // But this code is used before TRUE is allocated. 2157 // Therefore let's just use an arbitrary legal oop 2158 // available right here. _methods is a short[]. 2159 assert(_methods != NULL, "we need a legal oop"); 2160 _has_hidden_top_frame = true; 2161 _head->obj_at_put(trace_hidden_offset, _methods); 2162 } 2163 } 2164 }; 2165 2166 struct BacktraceElement : public StackObj { 2167 int _method_id; 2168 int _bci; 2169 int _version; 2170 Symbol* _name; 2171 Handle _mirror; 2172 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2173 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {} 2174 }; 2175 2176 class BacktraceIterator : public StackObj { 2177 int _index; 2178 objArrayHandle _result; 2179 objArrayHandle _mirrors; 2180 typeArrayHandle _methods; 2181 typeArrayHandle _bcis; 2182 typeArrayHandle _names; 2183 2184 void init(objArrayHandle result, Thread* thread) { 2185 // Get method id, bci, version and mirror from chunk 2186 _result = result; 2187 if (_result.not_null()) { 2188 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2189 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2190 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2191 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2192 _index = 0; 2193 } 2194 } 2195 public: 2196 BacktraceIterator(objArrayHandle result, Thread* thread) { 2197 init(result, thread); 2198 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2199 } 2200 2201 BacktraceElement next(Thread* thread) { 2202 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2203 _methods->ushort_at(_index), 2204 Backtrace::version_at(_bcis->int_at(_index)), 2205 Backtrace::bci_at(_bcis->int_at(_index)), 2206 _names->symbol_at(_index)); 2207 _index++; 2208 2209 if (_index >= java_lang_Throwable::trace_chunk_size) { 2210 int next_offset = java_lang_Throwable::trace_next_offset; 2211 // Get next chunk 2212 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2213 init(result, thread); 2214 } 2215 return e; 2216 } 2217 2218 bool repeat() { 2219 return _result.not_null() && _mirrors->obj_at(_index) != NULL; 2220 } 2221 }; 2222 2223 2224 // Print stack trace element to resource allocated buffer 2225 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 2226 int version, int bci, Symbol* name) { 2227 ResourceMark rm; 2228 2229 // Get strings and string lengths 2230 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2231 const char* klass_name = holder->external_name(); 2232 int buf_len = (int)strlen(klass_name); 2233 2234 char* method_name = name->as_C_string(); 2235 buf_len += (int)strlen(method_name); 2236 2237 char* source_file_name = NULL; 2238 Symbol* source = Backtrace::get_source_file_name(holder, version); 2239 if (source != NULL) { 2240 source_file_name = source->as_C_string(); 2241 buf_len += (int)strlen(source_file_name); 2242 } 2243 2244 char *module_name = NULL, *module_version = NULL; 2245 ModuleEntry* module = holder->module(); 2246 if (module->is_named()) { 2247 module_name = module->name()->as_C_string(); 2248 buf_len += (int)strlen(module_name); 2249 if (module->version() != NULL) { 2250 module_version = module->version()->as_C_string(); 2251 buf_len += (int)strlen(module_version); 2252 } 2253 } 2254 2255 // Allocate temporary buffer with extra space for formatting and line number 2256 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 2257 2258 // Print stack trace line in buffer 2259 sprintf(buf, "\tat %s.%s(", klass_name, method_name); 2260 2261 // Print module information 2262 if (module_name != NULL) { 2263 if (module_version != NULL) { 2264 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version); 2265 } else { 2266 sprintf(buf + (int)strlen(buf), "%s/", module_name); 2267 } 2268 } 2269 2270 // The method can be NULL if the requested class version is gone 2271 Method* method = holder->method_with_orig_idnum(method_id, version); 2272 if (!version_matches(method, version)) { 2273 strcat(buf, "Redefined)"); 2274 } else { 2275 int line_number = Backtrace::get_line_number(method, bci); 2276 if (line_number == -2) { 2277 strcat(buf, "Native Method)"); 2278 } else { 2279 if (source_file_name != NULL && (line_number != -1)) { 2280 // Sourcename and linenumber 2281 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number); 2282 } else if (source_file_name != NULL) { 2283 // Just sourcename 2284 sprintf(buf + (int)strlen(buf), "%s)", source_file_name); 2285 } else { 2286 // Neither sourcename nor linenumber 2287 sprintf(buf + (int)strlen(buf), "Unknown Source)"); 2288 } 2289 CompiledMethod* nm = method->code(); 2290 if (WizardMode && nm != NULL) { 2291 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 2292 } 2293 } 2294 } 2295 2296 st->print_cr("%s", buf); 2297 } 2298 2299 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) { 2300 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 2301 int method_id = method->orig_method_idnum(); 2302 int version = method->constants()->version(); 2303 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 2304 } 2305 2306 /** 2307 * Print the throwable message and its stack trace plus all causes by walking the 2308 * cause chain. The output looks the same as of Throwable.printStackTrace(). 2309 */ 2310 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 2311 // First, print the message. 2312 print(throwable(), st); 2313 st->cr(); 2314 2315 // Now print the stack trace. 2316 Thread* THREAD = Thread::current(); 2317 while (throwable.not_null()) { 2318 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 2319 if (result.is_null()) { 2320 st->print_raw_cr("\t<<no stack trace available>>"); 2321 return; 2322 } 2323 BacktraceIterator iter(result, THREAD); 2324 2325 while (iter.repeat()) { 2326 BacktraceElement bte = iter.next(THREAD); 2327 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 2328 } 2329 { 2330 // Call getCause() which doesn't necessarily return the _cause field. 2331 EXCEPTION_MARK; 2332 JavaValue cause(T_OBJECT); 2333 JavaCalls::call_virtual(&cause, 2334 throwable, 2335 throwable->klass(), 2336 vmSymbols::getCause_name(), 2337 vmSymbols::void_throwable_signature(), 2338 THREAD); 2339 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 2340 if (HAS_PENDING_EXCEPTION) { 2341 CLEAR_PENDING_EXCEPTION; 2342 throwable = Handle(); 2343 } else { 2344 throwable = Handle(THREAD, (oop) cause.get_jobject()); 2345 if (throwable.not_null()) { 2346 st->print("Caused by: "); 2347 print(throwable(), st); 2348 st->cr(); 2349 } 2350 } 2351 } 2352 } 2353 } 2354 2355 /** 2356 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 2357 */ 2358 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 2359 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected"); 2360 JavaValue result(T_VOID); 2361 JavaCalls::call_virtual(&result, 2362 throwable, 2363 SystemDictionary::Throwable_klass(), 2364 vmSymbols::printStackTrace_name(), 2365 vmSymbols::void_method_signature(), 2366 THREAD); 2367 } 2368 2369 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 2370 if (!StackTraceInThrowable) return; 2371 ResourceMark rm(THREAD); 2372 2373 // Start out by clearing the backtrace for this object, in case the VM 2374 // runs out of memory while allocating the stack trace 2375 set_backtrace(throwable(), NULL); 2376 // Clear lazily constructed Java level stacktrace if refilling occurs 2377 // This is unnecessary in 1.7+ but harmless 2378 clear_stacktrace(throwable()); 2379 2380 int max_depth = MaxJavaStackTraceDepth; 2381 JavaThread* thread = (JavaThread*)THREAD; 2382 2383 BacktraceBuilder bt(CHECK); 2384 2385 // If there is no Java frame just return the method that was being called 2386 // with bci 0 2387 if (!thread->has_last_Java_frame()) { 2388 if (max_depth >= 1 && method() != NULL) { 2389 bt.push(method(), 0, CHECK); 2390 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 2391 set_depth(throwable(), 1); 2392 set_backtrace(throwable(), bt.backtrace()); 2393 } 2394 return; 2395 } 2396 2397 // Instead of using vframe directly, this version of fill_in_stack_trace 2398 // basically handles everything by hand. This significantly improved the 2399 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 2400 // See bug 6333838 for more details. 2401 // The "ASSERT" here is to verify this method generates the exactly same stack 2402 // trace as utilizing vframe. 2403 #ifdef ASSERT 2404 vframeStream st(thread); 2405 #endif 2406 int total_count = 0; 2407 RegisterMap map(thread, false); 2408 int decode_offset = 0; 2409 CompiledMethod* nm = NULL; 2410 bool skip_fillInStackTrace_check = false; 2411 bool skip_throwableInit_check = false; 2412 bool skip_hidden = !ShowHiddenFrames; 2413 2414 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 2415 Method* method = NULL; 2416 int bci = 0; 2417 2418 // Compiled java method case. 2419 if (decode_offset != 0) { 2420 DebugInfoReadStream stream(nm, decode_offset); 2421 decode_offset = stream.read_int(); 2422 method = (Method*)nm->metadata_at(stream.read_int()); 2423 bci = stream.read_bci(); 2424 } else { 2425 if (fr.is_first_frame()) break; 2426 address pc = fr.pc(); 2427 if (fr.is_interpreted_frame()) { 2428 address bcp = fr.interpreter_frame_bcp(); 2429 method = fr.interpreter_frame_method(); 2430 bci = method->bci_from(bcp); 2431 fr = fr.sender(&map); 2432 } else { 2433 CodeBlob* cb = fr.cb(); 2434 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 2435 // but non nmethod 2436 fr = fr.sender(&map); 2437 if (cb == NULL || !cb->is_compiled()) { 2438 continue; 2439 } 2440 nm = cb->as_compiled_method(); 2441 if (nm->method()->is_native()) { 2442 method = nm->method(); 2443 bci = 0; 2444 } else { 2445 PcDesc* pd = nm->pc_desc_at(pc); 2446 decode_offset = pd->scope_decode_offset(); 2447 // if decode_offset is not equal to 0, it will execute the 2448 // "compiled java method case" at the beginning of the loop. 2449 continue; 2450 } 2451 } 2452 } 2453 #ifdef ASSERT 2454 assert(st.method() == method && st.bci() == bci, 2455 "Wrong stack trace"); 2456 st.next(); 2457 #endif 2458 2459 // the format of the stacktrace will be: 2460 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2461 // - 0 or more <init> methods for the exception class (skipped) 2462 // - rest of the stack 2463 2464 if (!skip_fillInStackTrace_check) { 2465 if (method->name() == vmSymbols::fillInStackTrace_name() && 2466 throwable->is_a(method->method_holder())) { 2467 continue; 2468 } 2469 else { 2470 skip_fillInStackTrace_check = true; // gone past them all 2471 } 2472 } 2473 if (!skip_throwableInit_check) { 2474 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2475 2476 // skip <init> methods of the exception class and superclasses 2477 // This is simlar to classic VM. 2478 if (method->name() == vmSymbols::object_initializer_name() && 2479 throwable->is_a(method->method_holder())) { 2480 continue; 2481 } else { 2482 // there are none or we've seen them all - either way stop checking 2483 skip_throwableInit_check = true; 2484 } 2485 } 2486 if (method->is_hidden()) { 2487 if (skip_hidden) { 2488 if (total_count == 0) { 2489 // The top frame will be hidden from the stack trace. 2490 bt.set_has_hidden_top_frame(CHECK); 2491 } 2492 continue; 2493 } 2494 } 2495 bt.push(method, bci, CHECK); 2496 total_count++; 2497 } 2498 2499 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2500 2501 // Put completed stack trace into throwable object 2502 set_backtrace(throwable(), bt.backtrace()); 2503 set_depth(throwable(), total_count); 2504 } 2505 2506 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2507 // No-op if stack trace is disabled 2508 if (!StackTraceInThrowable) { 2509 return; 2510 } 2511 2512 // Disable stack traces for some preallocated out of memory errors 2513 if (!Universe::should_fill_in_stack_trace(throwable)) { 2514 return; 2515 } 2516 2517 PRESERVE_EXCEPTION_MARK; 2518 2519 JavaThread* thread = JavaThread::active(); 2520 fill_in_stack_trace(throwable, method, thread); 2521 // ignore exceptions thrown during stack trace filling 2522 CLEAR_PENDING_EXCEPTION; 2523 } 2524 2525 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2526 // Allocate stack trace - backtrace is created but not filled in 2527 2528 // No-op if stack trace is disabled 2529 if (!StackTraceInThrowable) return; 2530 BacktraceBuilder bt(CHECK); // creates a backtrace 2531 set_backtrace(throwable(), bt.backtrace()); 2532 } 2533 2534 2535 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2536 // Fill in stack trace into preallocated backtrace (no GC) 2537 2538 // No-op if stack trace is disabled 2539 if (!StackTraceInThrowable) return; 2540 2541 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 2542 2543 JavaThread* THREAD = JavaThread::current(); 2544 2545 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2546 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2547 2548 ResourceMark rm(THREAD); 2549 vframeStream st(THREAD); 2550 2551 BacktraceBuilder bt(THREAD, backtrace); 2552 2553 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2554 // methods as preallocated errors aren't created by "java" code. 2555 2556 // fill in as much stack trace as possible 2557 int chunk_count = 0; 2558 for (;!st.at_end(); st.next()) { 2559 bt.push(st.method(), st.bci(), CHECK); 2560 chunk_count++; 2561 2562 // Bail-out for deep stacks 2563 if (chunk_count >= trace_chunk_size) break; 2564 } 2565 set_depth(throwable(), chunk_count); 2566 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2567 2568 // We support the Throwable immutability protocol defined for Java 7. 2569 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2570 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 2571 } 2572 2573 void java_lang_Throwable::get_stack_trace_elements(Handle throwable, 2574 objArrayHandle stack_trace_array_h, TRAPS) { 2575 2576 if (throwable.is_null() || stack_trace_array_h.is_null()) { 2577 THROW(vmSymbols::java_lang_NullPointerException()); 2578 } 2579 2580 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2581 2582 if (stack_trace_array_h->length() != depth(throwable())) { 2583 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2584 } 2585 2586 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable()))); 2587 BacktraceIterator iter(result, THREAD); 2588 2589 int index = 0; 2590 while (iter.repeat()) { 2591 BacktraceElement bte = iter.next(THREAD); 2592 2593 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2594 2595 if (stack_trace_element.is_null()) { 2596 THROW(vmSymbols::java_lang_NullPointerException()); 2597 } 2598 2599 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2600 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2601 2602 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2603 method, 2604 bte._version, 2605 bte._bci, 2606 bte._name, CHECK); 2607 } 2608 } 2609 2610 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) { 2611 Thread* THREAD = Thread::current(); 2612 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable))); 2613 BacktraceIterator iter(result, THREAD); 2614 // No backtrace available. 2615 if (!iter.repeat()) return false; 2616 2617 // If the exception happened in a frame that has been hidden, i.e., 2618 // omitted from the back trace, we can not compute the message. 2619 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset); 2620 if (hidden != NULL) { 2621 return false; 2622 } 2623 2624 // Get first backtrace element. 2625 BacktraceElement bte = iter.next(THREAD); 2626 2627 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2628 assert(holder != NULL, "first element should be non-null"); 2629 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version); 2630 2631 // Original version is no longer available. 2632 if (m == NULL || !version_matches(m, bte._version)) { 2633 return false; 2634 } 2635 2636 *method = m; 2637 *bci = bte._bci; 2638 return true; 2639 } 2640 2641 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2642 // Allocate java.lang.StackTraceElement instance 2643 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 2644 assert(k != NULL, "must be loaded in 1.4+"); 2645 if (k->should_be_initialized()) { 2646 k->initialize(CHECK_NULL); 2647 } 2648 2649 Handle element = k->allocate_instance_handle(CHECK_NULL); 2650 2651 int version = method->constants()->version(); 2652 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL); 2653 return element(); 2654 } 2655 2656 void java_lang_StackTraceElement::fill_in(Handle element, 2657 InstanceKlass* holder, const methodHandle& method, 2658 int version, int bci, Symbol* name, TRAPS) { 2659 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check"); 2660 2661 ResourceMark rm(THREAD); 2662 HandleMark hm(THREAD); 2663 2664 // Fill in class name 2665 Handle java_class(THREAD, holder->java_mirror()); 2666 oop classname = java_lang_Class::name(java_class, CHECK); 2667 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2668 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class()); 2669 2670 oop loader = holder->class_loader(); 2671 if (loader != NULL) { 2672 oop loader_name = java_lang_ClassLoader::name(loader); 2673 if (loader_name != NULL) 2674 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2675 } 2676 2677 // Fill in method name 2678 oop methodname = StringTable::intern(name, CHECK); 2679 java_lang_StackTraceElement::set_methodName(element(), methodname); 2680 2681 // Fill in module name and version 2682 ModuleEntry* module = holder->module(); 2683 if (module->is_named()) { 2684 oop module_name = StringTable::intern(module->name(), CHECK); 2685 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2686 oop module_version; 2687 if (module->version() != NULL) { 2688 module_version = StringTable::intern(module->version(), CHECK); 2689 } else { 2690 module_version = NULL; 2691 } 2692 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2693 } 2694 2695 if (method() == NULL || !version_matches(method(), version)) { 2696 // The method was redefined, accurate line number information isn't available 2697 java_lang_StackTraceElement::set_fileName(element(), NULL); 2698 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2699 } else { 2700 Symbol* source; 2701 oop source_file; 2702 int line_number; 2703 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK); 2704 2705 java_lang_StackTraceElement::set_fileName(element(), source_file); 2706 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2707 } 2708 } 2709 2710 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class, 2711 InstanceKlass* holder, 2712 int version, 2713 const methodHandle& method, 2714 int bci, 2715 Symbol*& source, 2716 oop& source_file, 2717 int& line_number, TRAPS) { 2718 // Fill in source file name and line number. 2719 source = Backtrace::get_source_file_name(holder, version); 2720 source_file = java_lang_Class::source_file(java_class()); 2721 if (source != NULL) { 2722 // Class was not redefined. We can trust its cache if set, 2723 // else we have to initialize it. 2724 if (source_file == NULL) { 2725 source_file = StringTable::intern(source, CHECK); 2726 java_lang_Class::set_source_file(java_class(), source_file); 2727 } 2728 } else { 2729 // Class was redefined. Dump the cache if it was set. 2730 if (source_file != NULL) { 2731 source_file = NULL; 2732 java_lang_Class::set_source_file(java_class(), source_file); 2733 } 2734 } 2735 line_number = Backtrace::get_line_number(method(), bci); 2736 } 2737 2738 #if INCLUDE_JVMCI 2739 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci, 2740 Symbol*& filename, int& line_number, TRAPS) { 2741 ResourceMark rm(THREAD); 2742 HandleMark hm(THREAD); 2743 2744 filename = NULL; 2745 line_number = -1; 2746 2747 oop source_file; 2748 int version = method->constants()->version(); 2749 InstanceKlass* holder = method->method_holder(); 2750 Handle java_class(THREAD, holder->java_mirror()); 2751 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK); 2752 } 2753 #endif // INCLUDE_JVMCI 2754 2755 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 2756 HandleMark hm(THREAD); 2757 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 2758 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 2759 // we should expand MemberName::name when Throwable uses StackTrace 2760 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 2761 return method; 2762 } 2763 2764 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) { 2765 // set Method* or mid/cpref 2766 HandleMark hm(THREAD); 2767 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset)); 2768 InstanceKlass* ik = method->method_holder(); 2769 CallInfo info(method(), ik, CHECK); 2770 MethodHandles::init_method_MemberName(mname, info); 2771 // set bci 2772 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 2773 // method may be redefined; store the version 2774 int version = method->constants()->version(); 2775 assert((jushort)version == version, "version should be short"); 2776 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 2777 } 2778 2779 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 2780 ResourceMark rm(THREAD); 2781 HandleMark hm(THREAD); 2782 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset)); 2783 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname())); 2784 InstanceKlass* holder = InstanceKlass::cast(clazz); 2785 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 2786 2787 short version = stackFrame->short_field(_version_offset); 2788 int bci = stackFrame->int_field(_bci_offset); 2789 Symbol* name = method->name(); 2790 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), 2791 version, bci, name, CHECK); 2792 } 2793 2794 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 2795 macro(_memberName_offset, k, "memberName", object_signature, false); \ 2796 macro(_bci_offset, k, "bci", int_signature, false) 2797 2798 void java_lang_StackFrameInfo::compute_offsets() { 2799 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass(); 2800 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2801 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2802 } 2803 2804 #if INCLUDE_CDS 2805 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) { 2806 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2807 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 2808 } 2809 #endif 2810 2811 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 2812 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 2813 macro(_locals_offset, k, "locals", object_array_signature, false); \ 2814 macro(_operands_offset, k, "operands", object_array_signature, false); \ 2815 macro(_mode_offset, k, "mode", int_signature, false) 2816 2817 void java_lang_LiveStackFrameInfo::compute_offsets() { 2818 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass(); 2819 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2820 } 2821 2822 #if INCLUDE_CDS 2823 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) { 2824 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2825 } 2826 #endif 2827 2828 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 2829 macro(override_offset, k, "override", bool_signature, false) 2830 2831 void java_lang_reflect_AccessibleObject::compute_offsets() { 2832 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass(); 2833 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2834 } 2835 2836 #if INCLUDE_CDS 2837 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) { 2838 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2839 } 2840 #endif 2841 2842 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 2843 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2844 return (jboolean) reflect->bool_field(override_offset); 2845 } 2846 2847 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 2848 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2849 reflect->bool_field_put(override_offset, (int) value); 2850 } 2851 2852 #define METHOD_FIELDS_DO(macro) \ 2853 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2854 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2855 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 2856 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2857 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2858 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2859 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2860 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 2861 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 2862 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \ 2863 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false); 2864 2865 void java_lang_reflect_Method::compute_offsets() { 2866 InstanceKlass* k = SystemDictionary::reflect_Method_klass(); 2867 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2868 } 2869 2870 #if INCLUDE_CDS 2871 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) { 2872 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2873 } 2874 #endif 2875 2876 Handle java_lang_reflect_Method::create(TRAPS) { 2877 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2878 Klass* klass = SystemDictionary::reflect_Method_klass(); 2879 // This class is eagerly initialized during VM initialization, since we keep a refence 2880 // to one of the methods 2881 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2882 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2883 } 2884 2885 oop java_lang_reflect_Method::clazz(oop reflect) { 2886 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2887 return reflect->obj_field(clazz_offset); 2888 } 2889 2890 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2891 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2892 reflect->obj_field_put(clazz_offset, value); 2893 } 2894 2895 int java_lang_reflect_Method::slot(oop reflect) { 2896 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2897 return reflect->int_field(slot_offset); 2898 } 2899 2900 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2901 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2902 reflect->int_field_put(slot_offset, value); 2903 } 2904 2905 void java_lang_reflect_Method::set_name(oop method, oop value) { 2906 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2907 method->obj_field_put(name_offset, value); 2908 } 2909 2910 oop java_lang_reflect_Method::return_type(oop method) { 2911 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2912 return method->obj_field(returnType_offset); 2913 } 2914 2915 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2916 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2917 method->obj_field_put(returnType_offset, value); 2918 } 2919 2920 oop java_lang_reflect_Method::parameter_types(oop method) { 2921 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2922 return method->obj_field(parameterTypes_offset); 2923 } 2924 2925 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2926 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2927 method->obj_field_put(parameterTypes_offset, value); 2928 } 2929 2930 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2931 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2932 method->obj_field_put(exceptionTypes_offset, value); 2933 } 2934 2935 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2936 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2937 method->int_field_put(modifiers_offset, value); 2938 } 2939 2940 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2941 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2942 method->obj_field_put(signature_offset, value); 2943 } 2944 2945 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2946 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2947 method->obj_field_put(annotations_offset, value); 2948 } 2949 2950 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2951 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2952 method->obj_field_put(parameter_annotations_offset, value); 2953 } 2954 2955 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2956 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2957 method->obj_field_put(annotation_default_offset, value); 2958 } 2959 2960 #define CONSTRUCTOR_FIELDS_DO(macro) \ 2961 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2962 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2963 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2964 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2965 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2966 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 2967 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 2968 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); 2969 2970 void java_lang_reflect_Constructor::compute_offsets() { 2971 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass(); 2972 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2973 } 2974 2975 #if INCLUDE_CDS 2976 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) { 2977 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2978 } 2979 #endif 2980 2981 Handle java_lang_reflect_Constructor::create(TRAPS) { 2982 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2983 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2984 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2985 InstanceKlass* ik = InstanceKlass::cast(k); 2986 // Ensure it is initialized 2987 ik->initialize(CHECK_NH); 2988 return ik->allocate_instance_handle(THREAD); 2989 } 2990 2991 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2992 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2993 return reflect->obj_field(clazz_offset); 2994 } 2995 2996 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2997 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2998 reflect->obj_field_put(clazz_offset, value); 2999 } 3000 3001 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 3002 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3003 return constructor->obj_field(parameterTypes_offset); 3004 } 3005 3006 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 3007 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3008 constructor->obj_field_put(parameterTypes_offset, value); 3009 } 3010 3011 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 3012 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3013 constructor->obj_field_put(exceptionTypes_offset, value); 3014 } 3015 3016 int java_lang_reflect_Constructor::slot(oop reflect) { 3017 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3018 return reflect->int_field(slot_offset); 3019 } 3020 3021 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 3022 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3023 reflect->int_field_put(slot_offset, value); 3024 } 3025 3026 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 3027 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3028 constructor->int_field_put(modifiers_offset, value); 3029 } 3030 3031 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 3032 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3033 constructor->obj_field_put(signature_offset, value); 3034 } 3035 3036 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 3037 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3038 constructor->obj_field_put(annotations_offset, value); 3039 } 3040 3041 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 3042 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3043 method->obj_field_put(parameter_annotations_offset, value); 3044 } 3045 3046 #define FIELD_FIELDS_DO(macro) \ 3047 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3048 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3049 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \ 3050 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3051 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3052 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3053 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); 3054 3055 void java_lang_reflect_Field::compute_offsets() { 3056 InstanceKlass* k = SystemDictionary::reflect_Field_klass(); 3057 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3058 } 3059 3060 #if INCLUDE_CDS 3061 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) { 3062 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3063 } 3064 #endif 3065 3066 Handle java_lang_reflect_Field::create(TRAPS) { 3067 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3068 Symbol* name = vmSymbols::java_lang_reflect_Field(); 3069 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3070 InstanceKlass* ik = InstanceKlass::cast(k); 3071 // Ensure it is initialized 3072 ik->initialize(CHECK_NH); 3073 return ik->allocate_instance_handle(THREAD); 3074 } 3075 3076 oop java_lang_reflect_Field::clazz(oop reflect) { 3077 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3078 return reflect->obj_field(clazz_offset); 3079 } 3080 3081 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 3082 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3083 reflect->obj_field_put(clazz_offset, value); 3084 } 3085 3086 oop java_lang_reflect_Field::name(oop field) { 3087 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3088 return field->obj_field(name_offset); 3089 } 3090 3091 void java_lang_reflect_Field::set_name(oop field, oop value) { 3092 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3093 field->obj_field_put(name_offset, value); 3094 } 3095 3096 oop java_lang_reflect_Field::type(oop field) { 3097 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3098 return field->obj_field(type_offset); 3099 } 3100 3101 void java_lang_reflect_Field::set_type(oop field, oop value) { 3102 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3103 field->obj_field_put(type_offset, value); 3104 } 3105 3106 int java_lang_reflect_Field::slot(oop reflect) { 3107 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3108 return reflect->int_field(slot_offset); 3109 } 3110 3111 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 3112 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3113 reflect->int_field_put(slot_offset, value); 3114 } 3115 3116 int java_lang_reflect_Field::modifiers(oop field) { 3117 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3118 return field->int_field(modifiers_offset); 3119 } 3120 3121 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 3122 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3123 field->int_field_put(modifiers_offset, value); 3124 } 3125 3126 void java_lang_reflect_Field::set_signature(oop field, oop value) { 3127 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3128 field->obj_field_put(signature_offset, value); 3129 } 3130 3131 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 3132 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3133 field->obj_field_put(annotations_offset, value); 3134 } 3135 3136 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) { 3137 // Allocate java.lang.reflect.RecordComponent instance 3138 HandleMark hm(THREAD); 3139 InstanceKlass* ik = SystemDictionary::RecordComponent_klass(); 3140 assert(ik != NULL, "must be loaded"); 3141 ik->initialize(CHECK_NULL); 3142 3143 Handle element = ik->allocate_instance_handle(CHECK_NULL); 3144 3145 Handle decl_class(THREAD, holder->java_mirror()); 3146 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class()); 3147 3148 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8 3149 oop component_name = StringTable::intern(name, CHECK_NULL); 3150 java_lang_reflect_RecordComponent::set_name(element(), component_name); 3151 3152 Symbol* type = holder->constants()->symbol_at(component->descriptor_index()); 3153 Handle component_type_h = 3154 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL); 3155 java_lang_reflect_RecordComponent::set_type(element(), component_type_h()); 3156 3157 Method* accessor_method = NULL; 3158 { 3159 // Prepend "()" to type to create the full method signature. 3160 ResourceMark rm(THREAD); 3161 int sig_len = type->utf8_length() + 3; // "()" and null char 3162 char* sig = NEW_RESOURCE_ARRAY(char, sig_len); 3163 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string()); 3164 TempNewSymbol full_sig = SymbolTable::new_symbol(sig); 3165 accessor_method = holder->find_instance_method(name, full_sig, Klass::find_private); 3166 } 3167 3168 if (accessor_method != NULL) { 3169 methodHandle method(THREAD, accessor_method); 3170 oop m = Reflection::new_method(method, false, CHECK_NULL); 3171 java_lang_reflect_RecordComponent::set_accessor(element(), m); 3172 } else { 3173 java_lang_reflect_RecordComponent::set_accessor(element(), NULL); 3174 } 3175 3176 int sig_index = component->generic_signature_index(); 3177 if (sig_index > 0) { 3178 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8 3179 oop component_sig = StringTable::intern(sig, CHECK_NULL); 3180 java_lang_reflect_RecordComponent::set_signature(element(), component_sig); 3181 } else { 3182 java_lang_reflect_RecordComponent::set_signature(element(), NULL); 3183 } 3184 3185 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL); 3186 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop); 3187 3188 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL); 3189 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop); 3190 3191 return element(); 3192 } 3193 3194 #define CONSTANTPOOL_FIELDS_DO(macro) \ 3195 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 3196 3197 void reflect_ConstantPool::compute_offsets() { 3198 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3199 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3200 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3201 } 3202 3203 #if INCLUDE_CDS 3204 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) { 3205 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3206 } 3207 #endif 3208 3209 #define PARAMETER_FIELDS_DO(macro) \ 3210 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3211 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3212 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3213 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3214 3215 void java_lang_reflect_Parameter::compute_offsets() { 3216 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass(); 3217 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3218 } 3219 3220 #if INCLUDE_CDS 3221 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) { 3222 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3223 } 3224 #endif 3225 3226 Handle java_lang_reflect_Parameter::create(TRAPS) { 3227 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3228 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3229 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3230 InstanceKlass* ik = InstanceKlass::cast(k); 3231 // Ensure it is initialized 3232 ik->initialize(CHECK_NH); 3233 return ik->allocate_instance_handle(THREAD); 3234 } 3235 3236 oop java_lang_reflect_Parameter::name(oop param) { 3237 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3238 return param->obj_field(name_offset); 3239 } 3240 3241 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3242 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3243 param->obj_field_put(name_offset, value); 3244 } 3245 3246 int java_lang_reflect_Parameter::modifiers(oop param) { 3247 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3248 return param->int_field(modifiers_offset); 3249 } 3250 3251 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3252 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3253 param->int_field_put(modifiers_offset, value); 3254 } 3255 3256 int java_lang_reflect_Parameter::index(oop param) { 3257 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3258 return param->int_field(index_offset); 3259 } 3260 3261 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3262 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3263 param->int_field_put(index_offset, value); 3264 } 3265 3266 oop java_lang_reflect_Parameter::executable(oop param) { 3267 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3268 return param->obj_field(executable_offset); 3269 } 3270 3271 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3272 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3273 param->obj_field_put(executable_offset, value); 3274 } 3275 3276 3277 int java_lang_Module::loader_offset; 3278 int java_lang_Module::name_offset; 3279 int java_lang_Module::_module_entry_offset = -1; 3280 3281 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3282 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3283 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(), 3284 vmSymbols::java_lang_module_init_signature(), 3285 loader, module_name, CHECK_NH); 3286 } 3287 3288 #define MODULE_FIELDS_DO(macro) \ 3289 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3290 macro(name_offset, k, vmSymbols::name_name(), string_signature, false) 3291 3292 void java_lang_Module::compute_offsets() { 3293 InstanceKlass* k = SystemDictionary::Module_klass(); 3294 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3295 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3296 } 3297 3298 #if INCLUDE_CDS 3299 void java_lang_Module::serialize_offsets(SerializeClosure* f) { 3300 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3301 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3302 } 3303 #endif 3304 3305 oop java_lang_Module::loader(oop module) { 3306 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3307 return module->obj_field(loader_offset); 3308 } 3309 3310 void java_lang_Module::set_loader(oop module, oop value) { 3311 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3312 module->obj_field_put(loader_offset, value); 3313 } 3314 3315 oop java_lang_Module::name(oop module) { 3316 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3317 return module->obj_field(name_offset); 3318 } 3319 3320 void java_lang_Module::set_name(oop module, oop value) { 3321 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3322 module->obj_field_put(name_offset, value); 3323 } 3324 3325 ModuleEntry* java_lang_Module::module_entry(oop module) { 3326 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3327 assert(module != NULL, "module can't be null"); 3328 assert(oopDesc::is_oop(module), "module must be oop"); 3329 3330 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3331 if (module_entry == NULL) { 3332 // If the inject field containing the ModuleEntry* is null then return the 3333 // class loader's unnamed module. 3334 oop loader = java_lang_Module::loader(module); 3335 Handle h_loader = Handle(Thread::current(), loader); 3336 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3337 return loader_cld->unnamed_module(); 3338 } 3339 return module_entry; 3340 } 3341 3342 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3343 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3344 assert(module != NULL, "module can't be null"); 3345 assert(oopDesc::is_oop(module), "module must be oop"); 3346 module->address_field_put(_module_entry_offset, (address)module_entry); 3347 } 3348 3349 Handle reflect_ConstantPool::create(TRAPS) { 3350 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3351 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3352 // Ensure it is initialized 3353 k->initialize(CHECK_NH); 3354 return k->allocate_instance_handle(THREAD); 3355 } 3356 3357 3358 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3359 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3360 oop mirror = value->pool_holder()->java_mirror(); 3361 // Save the mirror to get back the constant pool. 3362 reflect->obj_field_put(_oop_offset, mirror); 3363 } 3364 3365 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3366 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3367 3368 oop mirror = reflect->obj_field(_oop_offset); 3369 Klass* k = java_lang_Class::as_Klass(mirror); 3370 assert(k->is_instance_klass(), "Must be"); 3371 3372 // Get the constant pool back from the klass. Since class redefinition 3373 // merges the new constant pool into the old, this is essentially the 3374 // same constant pool as the original. If constant pool merging is 3375 // no longer done in the future, this will have to change to save 3376 // the original. 3377 return InstanceKlass::cast(k)->constants(); 3378 } 3379 3380 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \ 3381 macro(_base_offset, k, "base", object_signature, false) 3382 3383 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 3384 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 3385 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3386 } 3387 3388 #if INCLUDE_CDS 3389 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) { 3390 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3391 } 3392 #endif 3393 3394 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 3395 Klass* k = SystemDictionary::box_klass(type); 3396 if (k == NULL) return NULL; 3397 InstanceKlass* ik = InstanceKlass::cast(k); 3398 if (!ik->is_initialized()) ik->initialize(CHECK_NULL); 3399 return ik->allocate_instance(THREAD); 3400 } 3401 3402 3403 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 3404 oop box = initialize_and_allocate(type, CHECK_NULL); 3405 if (box == NULL) return NULL; 3406 switch (type) { 3407 case T_BOOLEAN: 3408 box->bool_field_put(value_offset, value->z); 3409 break; 3410 case T_CHAR: 3411 box->char_field_put(value_offset, value->c); 3412 break; 3413 case T_FLOAT: 3414 box->float_field_put(value_offset, value->f); 3415 break; 3416 case T_DOUBLE: 3417 box->double_field_put(long_value_offset, value->d); 3418 break; 3419 case T_BYTE: 3420 box->byte_field_put(value_offset, value->b); 3421 break; 3422 case T_SHORT: 3423 box->short_field_put(value_offset, value->s); 3424 break; 3425 case T_INT: 3426 box->int_field_put(value_offset, value->i); 3427 break; 3428 case T_LONG: 3429 box->long_field_put(long_value_offset, value->j); 3430 break; 3431 default: 3432 return NULL; 3433 } 3434 return box; 3435 } 3436 3437 3438 BasicType java_lang_boxing_object::basic_type(oop box) { 3439 if (box == NULL) return T_ILLEGAL; 3440 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3441 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 3442 return T_ILLEGAL; 3443 return type; 3444 } 3445 3446 3447 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 3448 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3449 switch (type) { 3450 case T_BOOLEAN: 3451 value->z = box->bool_field(value_offset); 3452 break; 3453 case T_CHAR: 3454 value->c = box->char_field(value_offset); 3455 break; 3456 case T_FLOAT: 3457 value->f = box->float_field(value_offset); 3458 break; 3459 case T_DOUBLE: 3460 value->d = box->double_field(long_value_offset); 3461 break; 3462 case T_BYTE: 3463 value->b = box->byte_field(value_offset); 3464 break; 3465 case T_SHORT: 3466 value->s = box->short_field(value_offset); 3467 break; 3468 case T_INT: 3469 value->i = box->int_field(value_offset); 3470 break; 3471 case T_LONG: 3472 value->j = box->long_field(long_value_offset); 3473 break; 3474 default: 3475 return T_ILLEGAL; 3476 } // end switch 3477 return type; 3478 } 3479 3480 3481 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3482 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3483 switch (type) { 3484 case T_BOOLEAN: 3485 box->bool_field_put(value_offset, value->z); 3486 break; 3487 case T_CHAR: 3488 box->char_field_put(value_offset, value->c); 3489 break; 3490 case T_FLOAT: 3491 box->float_field_put(value_offset, value->f); 3492 break; 3493 case T_DOUBLE: 3494 box->double_field_put(long_value_offset, value->d); 3495 break; 3496 case T_BYTE: 3497 box->byte_field_put(value_offset, value->b); 3498 break; 3499 case T_SHORT: 3500 box->short_field_put(value_offset, value->s); 3501 break; 3502 case T_INT: 3503 box->int_field_put(value_offset, value->i); 3504 break; 3505 case T_LONG: 3506 box->long_field_put(long_value_offset, value->j); 3507 break; 3508 default: 3509 return T_ILLEGAL; 3510 } // end switch 3511 return type; 3512 } 3513 3514 3515 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3516 switch (type) { 3517 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3518 case T_CHAR: st->print("%d", value->c); break; 3519 case T_BYTE: st->print("%d", value->b); break; 3520 case T_SHORT: st->print("%d", value->s); break; 3521 case T_INT: st->print("%d", value->i); break; 3522 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 3523 case T_FLOAT: st->print("%f", value->f); break; 3524 case T_DOUBLE: st->print("%lf", value->d); break; 3525 default: st->print("type %d?", type); break; 3526 } 3527 } 3528 3529 // Support for java_lang_ref_Reference 3530 3531 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3532 assert(obj != NULL, "sanity"); 3533 if (offset != java_lang_ref_Reference::referent_offset) { 3534 return false; 3535 } 3536 3537 Klass* k = obj->klass(); 3538 if (!k->is_instance_klass()) { 3539 return false; 3540 } 3541 3542 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3543 bool is_reference = ik->reference_type() != REF_NONE; 3544 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); 3545 return is_reference; 3546 } 3547 3548 // Support for java_lang_ref_SoftReference 3549 // 3550 3551 #define SOFTREFERENCE_FIELDS_DO(macro) \ 3552 macro(timestamp_offset, k, "timestamp", long_signature, false); \ 3553 macro(static_clock_offset, k, "clock", long_signature, true) 3554 3555 void java_lang_ref_SoftReference::compute_offsets() { 3556 InstanceKlass* k = SystemDictionary::SoftReference_klass(); 3557 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3558 } 3559 3560 #if INCLUDE_CDS 3561 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) { 3562 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3563 } 3564 #endif 3565 3566 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3567 return ref->long_field(timestamp_offset); 3568 } 3569 3570 jlong java_lang_ref_SoftReference::clock() { 3571 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3572 oop base = ik->static_field_base_raw(); 3573 return base->long_field(static_clock_offset); 3574 } 3575 3576 void java_lang_ref_SoftReference::set_clock(jlong value) { 3577 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3578 oop base = ik->static_field_base_raw(); 3579 base->long_field_put(static_clock_offset, value); 3580 } 3581 3582 // Support for java_lang_invoke_DirectMethodHandle 3583 3584 int java_lang_invoke_DirectMethodHandle::_member_offset; 3585 3586 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3587 oop member_name = NULL; 3588 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 3589 "a DirectMethodHandle oop is expected"); 3590 return dmh->obj_field(member_offset_in_bytes()); 3591 } 3592 3593 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 3594 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 3595 3596 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3597 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass(); 3598 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3599 } 3600 3601 #if INCLUDE_CDS 3602 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) { 3603 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3604 } 3605 #endif 3606 3607 // Support for java_lang_invoke_MethodHandle 3608 3609 int java_lang_invoke_MethodHandle::_type_offset; 3610 int java_lang_invoke_MethodHandle::_form_offset; 3611 3612 int java_lang_invoke_MemberName::_clazz_offset; 3613 int java_lang_invoke_MemberName::_name_offset; 3614 int java_lang_invoke_MemberName::_type_offset; 3615 int java_lang_invoke_MemberName::_flags_offset; 3616 int java_lang_invoke_MemberName::_method_offset; 3617 int java_lang_invoke_MemberName::_vmindex_offset; 3618 3619 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 3620 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 3621 3622 int java_lang_invoke_LambdaForm::_vmentry_offset; 3623 3624 #define METHODHANDLE_FIELDS_DO(macro) \ 3625 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 3626 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 3627 3628 void java_lang_invoke_MethodHandle::compute_offsets() { 3629 InstanceKlass* k = SystemDictionary::MethodHandle_klass(); 3630 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3631 } 3632 3633 #if INCLUDE_CDS 3634 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) { 3635 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3636 } 3637 #endif 3638 3639 #define MEMBERNAME_FIELDS_DO(macro) \ 3640 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3641 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3642 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 3643 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 3644 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 3645 3646 void java_lang_invoke_MemberName::compute_offsets() { 3647 InstanceKlass* k = SystemDictionary::MemberName_klass(); 3648 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3649 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3650 } 3651 3652 #if INCLUDE_CDS 3653 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) { 3654 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3655 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3656 } 3657 #endif 3658 3659 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 3660 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3661 assert(k != NULL, "jdk mismatch"); 3662 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3663 } 3664 3665 #if INCLUDE_CDS 3666 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) { 3667 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3668 } 3669 #endif 3670 3671 #define LAMBDAFORM_FIELDS_DO(macro) \ 3672 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 3673 3674 void java_lang_invoke_LambdaForm::compute_offsets() { 3675 InstanceKlass* k = SystemDictionary::LambdaForm_klass(); 3676 assert (k != NULL, "jdk mismatch"); 3677 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3678 } 3679 3680 #if INCLUDE_CDS 3681 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) { 3682 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3683 } 3684 #endif 3685 3686 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 3687 return obj != NULL && is_subclass(obj->klass()); 3688 } 3689 3690 3691 oop java_lang_invoke_MethodHandle::type(oop mh) { 3692 return mh->obj_field(_type_offset); 3693 } 3694 3695 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 3696 mh->obj_field_put(_type_offset, mtype); 3697 } 3698 3699 oop java_lang_invoke_MethodHandle::form(oop mh) { 3700 assert(_form_offset != 0, ""); 3701 return mh->obj_field(_form_offset); 3702 } 3703 3704 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 3705 assert(_form_offset != 0, ""); 3706 mh->obj_field_put(_form_offset, lform); 3707 } 3708 3709 /// MemberName accessors 3710 3711 oop java_lang_invoke_MemberName::clazz(oop mname) { 3712 assert(is_instance(mname), "wrong type"); 3713 return mname->obj_field(_clazz_offset); 3714 } 3715 3716 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 3717 assert(is_instance(mname), "wrong type"); 3718 mname->obj_field_put(_clazz_offset, clazz); 3719 } 3720 3721 oop java_lang_invoke_MemberName::name(oop mname) { 3722 assert(is_instance(mname), "wrong type"); 3723 return mname->obj_field(_name_offset); 3724 } 3725 3726 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 3727 assert(is_instance(mname), "wrong type"); 3728 mname->obj_field_put(_name_offset, name); 3729 } 3730 3731 oop java_lang_invoke_MemberName::type(oop mname) { 3732 assert(is_instance(mname), "wrong type"); 3733 return mname->obj_field(_type_offset); 3734 } 3735 3736 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 3737 assert(is_instance(mname), "wrong type"); 3738 mname->obj_field_put(_type_offset, type); 3739 } 3740 3741 int java_lang_invoke_MemberName::flags(oop mname) { 3742 assert(is_instance(mname), "wrong type"); 3743 return mname->int_field(_flags_offset); 3744 } 3745 3746 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 3747 assert(is_instance(mname), "wrong type"); 3748 mname->int_field_put(_flags_offset, flags); 3749 } 3750 3751 3752 // Return vmtarget from ResolvedMethodName method field through indirection 3753 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 3754 assert(is_instance(mname), "wrong type"); 3755 oop method = mname->obj_field(_method_offset); 3756 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method); 3757 } 3758 3759 bool java_lang_invoke_MemberName::is_method(oop mname) { 3760 assert(is_instance(mname), "must be MemberName"); 3761 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 3762 } 3763 3764 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 3765 assert(is_instance(mname), "wrong type"); 3766 mname->obj_field_put(_method_offset, resolved_method); 3767 } 3768 3769 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 3770 assert(is_instance(mname), "wrong type"); 3771 return (intptr_t) mname->address_field(_vmindex_offset); 3772 } 3773 3774 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 3775 assert(is_instance(mname), "wrong type"); 3776 mname->address_field_put(_vmindex_offset, (address) index); 3777 } 3778 3779 3780 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 3781 assert(is_instance(resolved_method), "wrong type"); 3782 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 3783 assert(m->is_method(), "must be"); 3784 return m; 3785 } 3786 3787 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 3788 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 3789 assert(is_instance(resolved_method), "wrong type"); 3790 resolved_method->address_field_put(_vmtarget_offset, (address)m); 3791 } 3792 3793 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) { 3794 assert(is_instance(resolved_method), "wrong type"); 3795 resolved_method->obj_field_put(_vmholder_offset, holder); 3796 } 3797 3798 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 3799 const Method* method = m(); 3800 3801 // lookup ResolvedMethod oop in the table, or create a new one and intern it 3802 oop resolved_method = ResolvedMethodTable::find_method(method); 3803 if (resolved_method != NULL) { 3804 return resolved_method; 3805 } 3806 3807 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3808 if (!k->is_initialized()) { 3809 k->initialize(CHECK_NULL); 3810 } 3811 3812 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 3813 3814 NoSafepointVerifier nsv; 3815 3816 if (method->is_old()) { 3817 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() : 3818 method->get_new_method(); 3819 } 3820 3821 InstanceKlass* holder = method->method_holder(); 3822 3823 set_vmtarget(new_resolved_method, const_cast<Method*>(method)); 3824 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have 3825 // distinct loaders) to ensure the metadata is kept alive. 3826 // This mirror may be different than the one in clazz field. 3827 set_vmholder(new_resolved_method, holder->java_mirror()); 3828 3829 // Set flag in class to indicate this InstanceKlass has entries in the table 3830 // to avoid walking table during redefinition if none of the redefined classes 3831 // have any membernames in the table. 3832 holder->set_has_resolved_methods(); 3833 3834 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method)); 3835 } 3836 3837 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 3838 assert(is_instance(lform), "wrong type"); 3839 return lform->obj_field(_vmentry_offset); 3840 } 3841 3842 3843 // Support for java_lang_invoke_MethodType 3844 3845 int java_lang_invoke_MethodType::_rtype_offset; 3846 int java_lang_invoke_MethodType::_ptypes_offset; 3847 3848 #define METHODTYPE_FIELDS_DO(macro) \ 3849 macro(_rtype_offset, k, "rtype", class_signature, false); \ 3850 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 3851 3852 void java_lang_invoke_MethodType::compute_offsets() { 3853 InstanceKlass* k = SystemDictionary::MethodType_klass(); 3854 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3855 } 3856 3857 #if INCLUDE_CDS 3858 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) { 3859 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3860 } 3861 #endif 3862 3863 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 3864 st->print("("); 3865 objArrayOop pts = ptypes(mt); 3866 for (int i = 0, limit = pts->length(); i < limit; i++) { 3867 java_lang_Class::print_signature(pts->obj_at(i), st); 3868 } 3869 st->print(")"); 3870 java_lang_Class::print_signature(rtype(mt), st); 3871 } 3872 3873 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) { 3874 ResourceMark rm; 3875 stringStream buffer(128); 3876 print_signature(mt, &buffer); 3877 const char* sigstr = buffer.base(); 3878 int siglen = (int) buffer.size(); 3879 Symbol *name; 3880 if (!intern_if_not_found) { 3881 name = SymbolTable::probe(sigstr, siglen); 3882 } else { 3883 name = SymbolTable::new_symbol(sigstr, siglen); 3884 } 3885 return name; 3886 } 3887 3888 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 3889 if (mt1 == mt2) 3890 return true; 3891 if (rtype(mt1) != rtype(mt2)) 3892 return false; 3893 if (ptype_count(mt1) != ptype_count(mt2)) 3894 return false; 3895 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 3896 if (ptype(mt1, i) != ptype(mt2, i)) 3897 return false; 3898 } 3899 return true; 3900 } 3901 3902 oop java_lang_invoke_MethodType::rtype(oop mt) { 3903 assert(is_instance(mt), "must be a MethodType"); 3904 return mt->obj_field(_rtype_offset); 3905 } 3906 3907 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 3908 assert(is_instance(mt), "must be a MethodType"); 3909 return (objArrayOop) mt->obj_field(_ptypes_offset); 3910 } 3911 3912 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 3913 return ptypes(mt)->obj_at(idx); 3914 } 3915 3916 int java_lang_invoke_MethodType::ptype_count(oop mt) { 3917 return ptypes(mt)->length(); 3918 } 3919 3920 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 3921 objArrayOop pts = ptypes(mt); 3922 int count = pts->length(); 3923 int slots = 0; 3924 for (int i = 0; i < count; i++) { 3925 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 3926 slots += type2size[bt]; 3927 } 3928 return slots; 3929 } 3930 3931 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 3932 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 3933 return type2size[bt]; 3934 } 3935 3936 3937 // Support for java_lang_invoke_CallSite 3938 3939 int java_lang_invoke_CallSite::_target_offset; 3940 int java_lang_invoke_CallSite::_context_offset; 3941 3942 #define CALLSITE_FIELDS_DO(macro) \ 3943 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 3944 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false) 3945 3946 void java_lang_invoke_CallSite::compute_offsets() { 3947 InstanceKlass* k = SystemDictionary::CallSite_klass(); 3948 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3949 } 3950 3951 #if INCLUDE_CDS 3952 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) { 3953 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3954 } 3955 #endif 3956 3957 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) { 3958 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3959 3960 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset); 3961 return dep_oop; 3962 } 3963 3964 // Support for java_lang_invoke_ConstantCallSite 3965 3966 int java_lang_invoke_ConstantCallSite::_is_frozen_offset; 3967 3968 #define CONSTANTCALLSITE_FIELDS_DO(macro) \ 3969 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false) 3970 3971 void java_lang_invoke_ConstantCallSite::compute_offsets() { 3972 InstanceKlass* k = SystemDictionary::ConstantCallSite_klass(); 3973 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3974 } 3975 3976 #if INCLUDE_CDS 3977 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) { 3978 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3979 } 3980 #endif 3981 3982 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3983 3984 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3985 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset; 3986 3987 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3988 InstanceKlass* k = SystemDictionary::Context_klass(); 3989 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3990 } 3991 3992 #if INCLUDE_CDS 3993 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) { 3994 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3995 } 3996 #endif 3997 3998 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3999 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 4000 nmethodBucket* volatile* vmdeps_addr = (nmethodBucket* volatile*)call_site->field_addr(_vmdependencies_offset); 4001 volatile uint64_t* last_cleanup_addr = (volatile uint64_t*)call_site->field_addr(_last_cleanup_offset); 4002 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr); 4003 return dep_ctx; 4004 } 4005 4006 // Support for java_security_AccessControlContext 4007 4008 int java_security_AccessControlContext::_context_offset = 0; 4009 int java_security_AccessControlContext::_privilegedContext_offset = 0; 4010 int java_security_AccessControlContext::_isPrivileged_offset = 0; 4011 int java_security_AccessControlContext::_isAuthorized_offset = -1; 4012 4013 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \ 4014 macro(_context_offset, k, "context", protectiondomain_signature, false); \ 4015 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \ 4016 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \ 4017 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false) 4018 4019 void java_security_AccessControlContext::compute_offsets() { 4020 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 4021 InstanceKlass* k = SystemDictionary::AccessControlContext_klass(); 4022 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4023 } 4024 4025 #if INCLUDE_CDS 4026 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) { 4027 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4028 } 4029 #endif 4030 4031 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 4032 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 4033 assert(_isAuthorized_offset != -1, "offsets should have been initialized"); 4034 // Ensure klass is initialized 4035 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_NULL); 4036 // Allocate result 4037 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_NULL); 4038 // Fill in values 4039 result->obj_field_put(_context_offset, context()); 4040 result->obj_field_put(_privilegedContext_offset, privileged_context()); 4041 result->bool_field_put(_isPrivileged_offset, isPrivileged); 4042 // whitelist AccessControlContexts created by the JVM 4043 result->bool_field_put(_isAuthorized_offset, true); 4044 return result; 4045 } 4046 4047 4048 // Support for java_lang_ClassLoader 4049 4050 bool java_lang_ClassLoader::offsets_computed = false; 4051 int java_lang_ClassLoader::_loader_data_offset = -1; 4052 int java_lang_ClassLoader::parallelCapable_offset = -1; 4053 int java_lang_ClassLoader::name_offset = -1; 4054 int java_lang_ClassLoader::nameAndId_offset = -1; 4055 int java_lang_ClassLoader::unnamedModule_offset = -1; 4056 4057 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) { 4058 assert(loader != NULL, "loader must not be NULL"); 4059 assert(oopDesc::is_oop(loader), "loader must be oop"); 4060 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset); 4061 } 4062 4063 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) { 4064 assert(loader != NULL, "loader must not be NULL"); 4065 assert(oopDesc::is_oop(loader), "loader must be oop"); 4066 return RawAccess<>::load_at(loader, _loader_data_offset); 4067 } 4068 4069 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) { 4070 assert(loader != NULL, "loader must not be NULL"); 4071 assert(oopDesc::is_oop(loader), "loader must be oop"); 4072 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data); 4073 } 4074 4075 #define CLASSLOADER_FIELDS_DO(macro) \ 4076 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 4077 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 4078 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \ 4079 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 4080 macro(parent_offset, k1, "parent", classloader_signature, false) 4081 4082 void java_lang_ClassLoader::compute_offsets() { 4083 assert(!offsets_computed, "offsets should be initialized only once"); 4084 offsets_computed = true; 4085 4086 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass(); 4087 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4088 4089 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4090 } 4091 4092 #if INCLUDE_CDS 4093 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) { 4094 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4095 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4096 } 4097 #endif 4098 4099 oop java_lang_ClassLoader::parent(oop loader) { 4100 assert(is_instance(loader), "loader must be oop"); 4101 return loader->obj_field(parent_offset); 4102 } 4103 4104 // Returns the name field of this class loader. If the name field has not 4105 // been set, null will be returned. 4106 oop java_lang_ClassLoader::name(oop loader) { 4107 assert(is_instance(loader), "loader must be oop"); 4108 return loader->obj_field(name_offset); 4109 } 4110 4111 // Returns the nameAndId field of this class loader. The format is 4112 // as follows: 4113 // If the defining loader has a name explicitly set then '<loader-name>' @<id> 4114 // If the defining loader has no name then <qualified-class-name> @<id> 4115 // If built-in loader, then omit '@<id>' as there is only one instance. 4116 // Use ClassLoader::loader_name_id() to obtain this String as a char*. 4117 oop java_lang_ClassLoader::nameAndId(oop loader) { 4118 assert(is_instance(loader), "loader must be oop"); 4119 return loader->obj_field(nameAndId_offset); 4120 } 4121 4122 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 4123 assert(is_instance(loader), "loader must be oop"); 4124 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 4125 oop acl = loader; 4126 debug_only(jint loop_count = 0); 4127 // This loop taken verbatim from ClassLoader.java: 4128 do { 4129 acl = parent(acl); 4130 if (cl == acl) { 4131 return true; 4132 } 4133 assert(++loop_count > 0, "loop_count overflow"); 4134 } while (acl != NULL); 4135 return false; 4136 } 4137 4138 bool java_lang_ClassLoader::is_instance(oop obj) { 4139 return obj != NULL && is_subclass(obj->klass()); 4140 } 4141 4142 4143 // For class loader classes, parallelCapable defined 4144 // based on non-null field 4145 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 4146 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 4147 assert(parallelCapable_offset != -1, "offsets should have been initialized"); 4148 return (class_loader->obj_field(parallelCapable_offset) != NULL); 4149 } 4150 4151 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 4152 // Fix for 4474172; see evaluation for more details 4153 loader = non_reflection_class_loader(loader); 4154 4155 oop cl = SystemDictionary::java_system_loader(); 4156 while(cl != NULL) { 4157 if (cl == loader) return true; 4158 cl = parent(cl); 4159 } 4160 return false; 4161 } 4162 4163 // Return true if this is one of the class loaders associated with 4164 // the generated bytecodes for reflection. 4165 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 4166 if (loader != NULL) { 4167 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 4168 // This might be null in non-1.4 JDKs 4169 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)); 4170 } 4171 return false; 4172 } 4173 4174 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 4175 // See whether this is one of the class loaders associated with 4176 // the generated bytecodes for reflection, and if so, "magically" 4177 // delegate to its parent to prevent class loading from occurring 4178 // in places where applications using reflection didn't expect it. 4179 if (is_reflection_class_loader(loader)) { 4180 return parent(loader); 4181 } 4182 return loader; 4183 } 4184 4185 oop java_lang_ClassLoader::unnamedModule(oop loader) { 4186 assert(is_instance(loader), "loader must be oop"); 4187 return loader->obj_field(unnamedModule_offset); 4188 } 4189 4190 // Support for java_lang_System 4191 // 4192 #define SYSTEM_FIELDS_DO(macro) \ 4193 macro(static_in_offset, k, "in", input_stream_signature, true); \ 4194 macro(static_out_offset, k, "out", print_stream_signature, true); \ 4195 macro(static_err_offset, k, "err", print_stream_signature, true); \ 4196 macro(static_security_offset, k, "security", security_manager_signature, true) 4197 4198 void java_lang_System::compute_offsets() { 4199 InstanceKlass* k = SystemDictionary::System_klass(); 4200 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4201 } 4202 4203 #if INCLUDE_CDS 4204 void java_lang_System::serialize_offsets(SerializeClosure* f) { 4205 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4206 } 4207 #endif 4208 4209 int java_lang_System::in_offset_in_bytes() { return static_in_offset; } 4210 int java_lang_System::out_offset_in_bytes() { return static_out_offset; } 4211 int java_lang_System::err_offset_in_bytes() { return static_err_offset; } 4212 4213 // Support for jdk_internal_misc_UnsafeConstants 4214 // 4215 class UnsafeConstantsFixup : public FieldClosure { 4216 private: 4217 int _address_size; 4218 int _page_size; 4219 bool _big_endian; 4220 bool _use_unaligned_access; 4221 int _data_cache_line_flush_size; 4222 public: 4223 UnsafeConstantsFixup() { 4224 // round up values for all static final fields 4225 _address_size = sizeof(void*); 4226 _page_size = os::vm_page_size(); 4227 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true); 4228 _use_unaligned_access = UseUnalignedAccesses; 4229 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size(); 4230 } 4231 4232 void do_field(fieldDescriptor* fd) { 4233 oop mirror = fd->field_holder()->java_mirror(); 4234 assert(mirror != NULL, "UnsafeConstants must have mirror already"); 4235 assert(fd->field_holder() == SystemDictionary::UnsafeConstants_klass(), "Should be UnsafeConstants"); 4236 assert(fd->is_final(), "fields of UnsafeConstants must be final"); 4237 assert(fd->is_static(), "fields of UnsafeConstants must be static"); 4238 if (fd->name() == vmSymbols::address_size_name()) { 4239 mirror->int_field_put(fd->offset(), _address_size); 4240 } else if (fd->name() == vmSymbols::page_size_name()) { 4241 mirror->int_field_put(fd->offset(), _page_size); 4242 } else if (fd->name() == vmSymbols::big_endian_name()) { 4243 mirror->bool_field_put(fd->offset(), _big_endian); 4244 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) { 4245 mirror->bool_field_put(fd->offset(), _use_unaligned_access); 4246 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) { 4247 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size); 4248 } else { 4249 assert(false, "unexpected UnsafeConstants field"); 4250 } 4251 } 4252 }; 4253 4254 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() { 4255 UnsafeConstantsFixup fixup; 4256 SystemDictionary::UnsafeConstants_klass()->do_local_static_fields(&fixup); 4257 } 4258 4259 int java_lang_Class::_klass_offset; 4260 int java_lang_Class::_array_klass_offset; 4261 int java_lang_Class::_oop_size_offset; 4262 int java_lang_Class::_static_oop_field_count_offset; 4263 int java_lang_Class::_class_loader_offset; 4264 int java_lang_Class::_module_offset; 4265 int java_lang_Class::_protection_domain_offset; 4266 int java_lang_Class::_component_mirror_offset; 4267 int java_lang_Class::_init_lock_offset; 4268 int java_lang_Class::_signers_offset; 4269 int java_lang_Class::_name_offset; 4270 int java_lang_Class::_source_file_offset; 4271 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 4272 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL; 4273 int java_lang_Throwable::backtrace_offset; 4274 int java_lang_Throwable::detailMessage_offset; 4275 int java_lang_Throwable::stackTrace_offset; 4276 int java_lang_Throwable::depth_offset; 4277 int java_lang_Throwable::static_unassigned_stacktrace_offset; 4278 int java_lang_reflect_AccessibleObject::override_offset; 4279 int java_lang_reflect_Method::clazz_offset; 4280 int java_lang_reflect_Method::name_offset; 4281 int java_lang_reflect_Method::returnType_offset; 4282 int java_lang_reflect_Method::parameterTypes_offset; 4283 int java_lang_reflect_Method::exceptionTypes_offset; 4284 int java_lang_reflect_Method::slot_offset; 4285 int java_lang_reflect_Method::modifiers_offset; 4286 int java_lang_reflect_Method::signature_offset; 4287 int java_lang_reflect_Method::annotations_offset; 4288 int java_lang_reflect_Method::parameter_annotations_offset; 4289 int java_lang_reflect_Method::annotation_default_offset; 4290 int java_lang_reflect_Constructor::clazz_offset; 4291 int java_lang_reflect_Constructor::parameterTypes_offset; 4292 int java_lang_reflect_Constructor::exceptionTypes_offset; 4293 int java_lang_reflect_Constructor::slot_offset; 4294 int java_lang_reflect_Constructor::modifiers_offset; 4295 int java_lang_reflect_Constructor::signature_offset; 4296 int java_lang_reflect_Constructor::annotations_offset; 4297 int java_lang_reflect_Constructor::parameter_annotations_offset; 4298 int java_lang_reflect_Field::clazz_offset; 4299 int java_lang_reflect_Field::name_offset; 4300 int java_lang_reflect_Field::type_offset; 4301 int java_lang_reflect_Field::slot_offset; 4302 int java_lang_reflect_Field::modifiers_offset; 4303 int java_lang_reflect_Field::signature_offset; 4304 int java_lang_reflect_Field::annotations_offset; 4305 int java_lang_reflect_Parameter::name_offset; 4306 int java_lang_reflect_Parameter::modifiers_offset; 4307 int java_lang_reflect_Parameter::index_offset; 4308 int java_lang_reflect_Parameter::executable_offset; 4309 int java_lang_boxing_object::value_offset; 4310 int java_lang_boxing_object::long_value_offset; 4311 int java_lang_ref_Reference::referent_offset; 4312 int java_lang_ref_Reference::queue_offset; 4313 int java_lang_ref_Reference::next_offset; 4314 int java_lang_ref_Reference::discovered_offset; 4315 int java_lang_ref_SoftReference::timestamp_offset; 4316 int java_lang_ref_SoftReference::static_clock_offset; 4317 int java_lang_ClassLoader::parent_offset; 4318 int java_lang_System::static_in_offset; 4319 int java_lang_System::static_out_offset; 4320 int java_lang_System::static_err_offset; 4321 int java_lang_System::static_security_offset; 4322 int java_lang_StackTraceElement::methodName_offset; 4323 int java_lang_StackTraceElement::fileName_offset; 4324 int java_lang_StackTraceElement::lineNumber_offset; 4325 int java_lang_StackTraceElement::moduleName_offset; 4326 int java_lang_StackTraceElement::moduleVersion_offset; 4327 int java_lang_StackTraceElement::classLoaderName_offset; 4328 int java_lang_StackTraceElement::declaringClass_offset; 4329 int java_lang_StackTraceElement::declaringClassObject_offset; 4330 int java_lang_StackFrameInfo::_memberName_offset; 4331 int java_lang_StackFrameInfo::_bci_offset; 4332 int java_lang_StackFrameInfo::_version_offset; 4333 int java_lang_LiveStackFrameInfo::_monitors_offset; 4334 int java_lang_LiveStackFrameInfo::_locals_offset; 4335 int java_lang_LiveStackFrameInfo::_operands_offset; 4336 int java_lang_LiveStackFrameInfo::_mode_offset; 4337 int java_lang_AssertionStatusDirectives::classes_offset; 4338 int java_lang_AssertionStatusDirectives::classEnabled_offset; 4339 int java_lang_AssertionStatusDirectives::packages_offset; 4340 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 4341 int java_lang_AssertionStatusDirectives::deflt_offset; 4342 int java_nio_Buffer::_limit_offset; 4343 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset; 4344 int reflect_ConstantPool::_oop_offset; 4345 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 4346 int java_lang_Integer_IntegerCache::_static_cache_offset; 4347 int java_lang_Long_LongCache::_static_cache_offset; 4348 int java_lang_Character_CharacterCache::_static_cache_offset; 4349 int java_lang_Short_ShortCache::_static_cache_offset; 4350 int java_lang_Byte_ByteCache::_static_cache_offset; 4351 int java_lang_Boolean::_static_TRUE_offset; 4352 int java_lang_Boolean::_static_FALSE_offset; 4353 int java_lang_reflect_RecordComponent::clazz_offset; 4354 int java_lang_reflect_RecordComponent::name_offset; 4355 int java_lang_reflect_RecordComponent::type_offset; 4356 int java_lang_reflect_RecordComponent::accessor_offset; 4357 int java_lang_reflect_RecordComponent::signature_offset; 4358 int java_lang_reflect_RecordComponent::annotations_offset; 4359 int java_lang_reflect_RecordComponent::typeAnnotations_offset; 4360 4361 4362 4363 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4364 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4365 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4366 macro(moduleName_offset, k, "moduleName", string_signature, false); \ 4367 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4368 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \ 4369 macro(methodName_offset, k, "methodName", string_signature, false); \ 4370 macro(fileName_offset, k, "fileName", string_signature, false); \ 4371 macro(lineNumber_offset, k, "lineNumber", int_signature, false) 4372 4373 // Support for java_lang_StackTraceElement 4374 void java_lang_StackTraceElement::compute_offsets() { 4375 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 4376 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4377 } 4378 4379 #if INCLUDE_CDS 4380 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) { 4381 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4382 } 4383 #endif 4384 4385 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 4386 element->obj_field_put(fileName_offset, value); 4387 } 4388 4389 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 4390 element->obj_field_put(declaringClass_offset, value); 4391 } 4392 4393 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 4394 element->obj_field_put(methodName_offset, value); 4395 } 4396 4397 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 4398 element->int_field_put(lineNumber_offset, value); 4399 } 4400 4401 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 4402 element->obj_field_put(moduleName_offset, value); 4403 } 4404 4405 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 4406 element->obj_field_put(moduleVersion_offset, value); 4407 } 4408 4409 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 4410 element->obj_field_put(classLoaderName_offset, value); 4411 } 4412 4413 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 4414 element->obj_field_put(declaringClassObject_offset, value); 4415 } 4416 4417 void java_lang_StackFrameInfo::set_version(oop element, short value) { 4418 element->short_field_put(_version_offset, value); 4419 } 4420 4421 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 4422 assert(value >= 0 && value < max_jushort, "must be a valid bci value"); 4423 element->int_field_put(_bci_offset, value); 4424 } 4425 4426 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 4427 element->obj_field_put(_monitors_offset, value); 4428 } 4429 4430 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 4431 element->obj_field_put(_locals_offset, value); 4432 } 4433 4434 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 4435 element->obj_field_put(_operands_offset, value); 4436 } 4437 4438 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) { 4439 element->int_field_put(_mode_offset, value); 4440 } 4441 4442 // Support for java Assertions - java_lang_AssertionStatusDirectives. 4443 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 4444 macro(classes_offset, k, "classes", string_array_signature, false); \ 4445 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 4446 macro(packages_offset, k, "packages", string_array_signature, false); \ 4447 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 4448 macro(deflt_offset, k, "deflt", bool_signature, false) 4449 4450 void java_lang_AssertionStatusDirectives::compute_offsets() { 4451 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass(); 4452 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4453 } 4454 4455 #if INCLUDE_CDS 4456 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) { 4457 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4458 } 4459 #endif 4460 4461 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 4462 o->obj_field_put(classes_offset, val); 4463 } 4464 4465 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 4466 o->obj_field_put(classEnabled_offset, val); 4467 } 4468 4469 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 4470 o->obj_field_put(packages_offset, val); 4471 } 4472 4473 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 4474 o->obj_field_put(packageEnabled_offset, val); 4475 } 4476 4477 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 4478 o->bool_field_put(deflt_offset, val); 4479 } 4480 4481 4482 // Support for intrinsification of java.nio.Buffer.checkIndex 4483 int java_nio_Buffer::limit_offset() { 4484 return _limit_offset; 4485 } 4486 4487 #define BUFFER_FIELDS_DO(macro) \ 4488 macro(_limit_offset, k, "limit", int_signature, false) 4489 4490 void java_nio_Buffer::compute_offsets() { 4491 InstanceKlass* k = SystemDictionary::nio_Buffer_klass(); 4492 assert(k != NULL, "must be loaded in 1.4+"); 4493 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4494 } 4495 4496 #if INCLUDE_CDS 4497 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) { 4498 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4499 } 4500 #endif 4501 4502 #define AOS_FIELDS_DO(macro) \ 4503 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false) 4504 4505 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() { 4506 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass(); 4507 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4508 } 4509 4510 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 4511 assert(_owner_offset != 0, "Must be initialized"); 4512 return obj->obj_field(_owner_offset); 4513 } 4514 4515 #if INCLUDE_CDS 4516 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) { 4517 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4518 } 4519 #endif 4520 4521 #define INTEGER_CACHE_FIELDS_DO(macro) \ 4522 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true) 4523 4524 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) { 4525 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4526 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4527 } 4528 4529 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) { 4530 oop base = ik->static_field_base_raw(); 4531 return objArrayOop(base->obj_field(_static_cache_offset)); 4532 } 4533 4534 Symbol* java_lang_Integer_IntegerCache::symbol() { 4535 return vmSymbols::java_lang_Integer_IntegerCache(); 4536 } 4537 4538 #if INCLUDE_CDS 4539 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) { 4540 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4541 } 4542 #endif 4543 #undef INTEGER_CACHE_FIELDS_DO 4544 4545 jint java_lang_Integer::value(oop obj) { 4546 jvalue v; 4547 java_lang_boxing_object::get_value(obj, &v); 4548 return v.i; 4549 } 4550 4551 #define LONG_CACHE_FIELDS_DO(macro) \ 4552 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true) 4553 4554 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) { 4555 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4556 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4557 } 4558 4559 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) { 4560 oop base = ik->static_field_base_raw(); 4561 return objArrayOop(base->obj_field(_static_cache_offset)); 4562 } 4563 4564 Symbol* java_lang_Long_LongCache::symbol() { 4565 return vmSymbols::java_lang_Long_LongCache(); 4566 } 4567 4568 #if INCLUDE_CDS 4569 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) { 4570 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4571 } 4572 #endif 4573 #undef LONG_CACHE_FIELDS_DO 4574 4575 jlong java_lang_Long::value(oop obj) { 4576 jvalue v; 4577 java_lang_boxing_object::get_value(obj, &v); 4578 return v.j; 4579 } 4580 4581 #define CHARACTER_CACHE_FIELDS_DO(macro) \ 4582 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true) 4583 4584 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) { 4585 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4586 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4587 } 4588 4589 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) { 4590 oop base = ik->static_field_base_raw(); 4591 return objArrayOop(base->obj_field(_static_cache_offset)); 4592 } 4593 4594 Symbol* java_lang_Character_CharacterCache::symbol() { 4595 return vmSymbols::java_lang_Character_CharacterCache(); 4596 } 4597 4598 #if INCLUDE_CDS 4599 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) { 4600 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4601 } 4602 #endif 4603 #undef CHARACTER_CACHE_FIELDS_DO 4604 4605 jchar java_lang_Character::value(oop obj) { 4606 jvalue v; 4607 java_lang_boxing_object::get_value(obj, &v); 4608 return v.c; 4609 } 4610 4611 #define SHORT_CACHE_FIELDS_DO(macro) \ 4612 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true) 4613 4614 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) { 4615 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4616 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4617 } 4618 4619 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) { 4620 oop base = ik->static_field_base_raw(); 4621 return objArrayOop(base->obj_field(_static_cache_offset)); 4622 } 4623 4624 Symbol* java_lang_Short_ShortCache::symbol() { 4625 return vmSymbols::java_lang_Short_ShortCache(); 4626 } 4627 4628 #if INCLUDE_CDS 4629 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) { 4630 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4631 } 4632 #endif 4633 #undef SHORT_CACHE_FIELDS_DO 4634 4635 jshort java_lang_Short::value(oop obj) { 4636 jvalue v; 4637 java_lang_boxing_object::get_value(obj, &v); 4638 return v.s; 4639 } 4640 4641 #define BYTE_CACHE_FIELDS_DO(macro) \ 4642 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true) 4643 4644 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) { 4645 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4646 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4647 } 4648 4649 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) { 4650 oop base = ik->static_field_base_raw(); 4651 return objArrayOop(base->obj_field(_static_cache_offset)); 4652 } 4653 4654 Symbol* java_lang_Byte_ByteCache::symbol() { 4655 return vmSymbols::java_lang_Byte_ByteCache(); 4656 } 4657 4658 #if INCLUDE_CDS 4659 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) { 4660 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4661 } 4662 #endif 4663 #undef BYTE_CACHE_FIELDS_DO 4664 4665 jbyte java_lang_Byte::value(oop obj) { 4666 jvalue v; 4667 java_lang_boxing_object::get_value(obj, &v); 4668 return v.b; 4669 } 4670 #define BOOLEAN_FIELDS_DO(macro) \ 4671 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \ 4672 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true) 4673 4674 4675 void java_lang_Boolean::compute_offsets(InstanceKlass *k) { 4676 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4677 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4678 } 4679 4680 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) { 4681 oop base = ik->static_field_base_raw(); 4682 return base->obj_field(_static_TRUE_offset); 4683 } 4684 4685 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) { 4686 oop base = ik->static_field_base_raw(); 4687 return base->obj_field(_static_FALSE_offset); 4688 } 4689 4690 Symbol* java_lang_Boolean::symbol() { 4691 return vmSymbols::java_lang_Boolean(); 4692 } 4693 4694 #if INCLUDE_CDS 4695 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) { 4696 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4697 } 4698 #endif 4699 #undef BOOLEAN_CACHE_FIELDS_DO 4700 4701 jboolean java_lang_Boolean::value(oop obj) { 4702 jvalue v; 4703 java_lang_boxing_object::get_value(obj, &v); 4704 return v.z; 4705 } 4706 4707 static int member_offset(int hardcoded_offset) { 4708 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes(); 4709 } 4710 4711 #define RECORDCOMPONENT_FIELDS_DO(macro) \ 4712 macro(clazz_offset, k, "clazz", class_signature, false); \ 4713 macro(name_offset, k, "name", string_signature, false); \ 4714 macro(type_offset, k, "type", class_signature, false); \ 4715 macro(accessor_offset, k, "accessor", reflect_method_signature, false); \ 4716 macro(signature_offset, k, "signature", string_signature, false); \ 4717 macro(annotations_offset, k, "annotations", byte_array_signature, false); \ 4718 macro(typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false); 4719 4720 // Support for java_lang_reflect_RecordComponent 4721 void java_lang_reflect_RecordComponent::compute_offsets() { 4722 InstanceKlass* k = SystemDictionary::RecordComponent_klass(); 4723 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4724 } 4725 4726 #if INCLUDE_CDS 4727 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) { 4728 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4729 } 4730 #endif 4731 4732 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) { 4733 element->obj_field_put(clazz_offset, value); 4734 } 4735 4736 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) { 4737 element->obj_field_put(name_offset, value); 4738 } 4739 4740 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) { 4741 element->obj_field_put(type_offset, value); 4742 } 4743 4744 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) { 4745 element->obj_field_put(accessor_offset, value); 4746 } 4747 4748 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) { 4749 element->obj_field_put(signature_offset, value); 4750 } 4751 4752 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) { 4753 element->obj_field_put(annotations_offset, value); 4754 } 4755 4756 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) { 4757 element->obj_field_put(typeAnnotations_offset, value); 4758 } 4759 4760 // Compute hard-coded offsets 4761 // Invoked before SystemDictionary::initialize, so pre-loaded classes 4762 // are not available to determine the offset_of_static_fields. 4763 void JavaClasses::compute_hard_coded_offsets() { 4764 4765 // java_lang_boxing_object 4766 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset); 4767 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong); 4768 4769 // java_lang_ref_Reference 4770 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset); 4771 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset); 4772 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset); 4773 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset); 4774 } 4775 4776 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets(); 4777 4778 // Compute non-hard-coded field offsets of all the classes in this file 4779 void JavaClasses::compute_offsets() { 4780 if (UseSharedSpaces) { 4781 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() && 4782 JvmtiExport::has_early_class_hook_env()), 4783 "JavaClasses::compute_offsets() must be called in early JVMTI phase.")); 4784 // None of the classes used by the rest of this function can be replaced by 4785 // JMVTI ClassFileLoadHook. 4786 // We are safe to use the archived offsets, which have already been restored 4787 // by JavaClasses::serialize_offsets, without computing the offsets again. 4788 return; 4789 } 4790 4791 // We have already called the compute_offsets() of the 4792 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class) 4793 // earlier inside SystemDictionary::resolve_well_known_classes() 4794 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS); 4795 } 4796 4797 #if INCLUDE_CDS 4798 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc); 4799 4800 void JavaClasses::serialize_offsets(SerializeClosure* soc) { 4801 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS); 4802 } 4803 #endif 4804 4805 #if INCLUDE_CDS_JAVA_HEAP 4806 bool JavaClasses::is_supported_for_archiving(oop obj) { 4807 Klass* klass = obj->klass(); 4808 4809 if (klass == SystemDictionary::ClassLoader_klass() || // ClassLoader::loader_data is malloc'ed. 4810 klass == SystemDictionary::Module_klass() || // Module::module_entry is malloc'ed 4811 // The next 3 classes are used to implement java.lang.invoke, and are not used directly in 4812 // regular Java code. The implementation of java.lang.invoke uses generated anonymoys classes 4813 // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS. 4814 // So for now we cannot not support these classes for archiving. 4815 // 4816 // These objects typically are not referenced by static fields, but rather by resolved 4817 // constant pool entries, so excluding them shouldn't affect the archiving of static fields. 4818 klass == SystemDictionary::ResolvedMethodName_klass() || 4819 klass == SystemDictionary::MemberName_klass() || 4820 klass == SystemDictionary::Context_klass()) { 4821 return false; 4822 } 4823 4824 return true; 4825 } 4826 #endif 4827 4828 #ifndef PRODUCT 4829 4830 // These functions exist to assert the validity of hard-coded field offsets to guard 4831 // against changes in the class files 4832 4833 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 4834 EXCEPTION_MARK; 4835 fieldDescriptor fd; 4836 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name); 4837 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 4838 InstanceKlass* ik = InstanceKlass::cast(k); 4839 TempNewSymbol f_name = SymbolTable::new_symbol(field_name); 4840 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig); 4841 if (!ik->find_local_field(f_name, f_sig, &fd)) { 4842 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 4843 return false; 4844 } 4845 if (fd.is_static()) { 4846 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 4847 return false; 4848 } 4849 if (fd.offset() == hardcoded_offset ) { 4850 return true; 4851 } else { 4852 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 4853 klass_name, field_name, hardcoded_offset, fd.offset()); 4854 return false; 4855 } 4856 } 4857 4858 // Check the hard-coded field offsets of all the classes in this file 4859 4860 void JavaClasses::check_offsets() { 4861 bool valid = true; 4862 4863 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4864 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 4865 4866 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4867 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 4868 4869 // Boxed primitive objects (java_lang_boxing_object) 4870 4871 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 4872 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 4873 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 4874 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 4875 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 4876 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 4877 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 4878 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 4879 4880 // java.lang.ref.Reference 4881 4882 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 4883 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 4884 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 4885 // Fake field 4886 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 4887 4888 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 4889 } 4890 4891 #endif // PRODUCT 4892 4893 int InjectedField::compute_offset() { 4894 InstanceKlass* ik = InstanceKlass::cast(klass()); 4895 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4896 if (!may_be_java && !fs.access_flags().is_internal()) { 4897 // Only look at injected fields 4898 continue; 4899 } 4900 if (fs.name() == name() && fs.signature() == signature()) { 4901 return fs.offset(); 4902 } 4903 } 4904 ResourceMark rm; 4905 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)" : ""); 4906 #ifndef PRODUCT 4907 ik->print(); 4908 tty->print_cr("all fields:"); 4909 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4910 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 4911 } 4912 #endif //PRODUCT 4913 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 4914 return -1; 4915 } 4916 4917 void javaClasses_init() { 4918 JavaClasses::compute_offsets(); 4919 JavaClasses::check_offsets(); 4920 FilteredFieldsMap::initialize(); // must be done after computing offsets. 4921 }