1 /* 2 * Copyright (c) 1997, 2018, 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/vmSymbols.hpp" 32 #include "code/debugInfo.hpp" 33 #include "code/dependencyContext.hpp" 34 #include "code/pcDesc.hpp" 35 #include "interpreter/interpreter.hpp" 36 #include "interpreter/linkResolver.hpp" 37 #include "logging/log.hpp" 38 #include "logging/logStream.hpp" 39 #include "memory/heapShared.inline.hpp" 40 #include "memory/metaspaceShared.hpp" 41 #include "memory/oopFactory.hpp" 42 #include "memory/resourceArea.hpp" 43 #include "memory/universe.hpp" 44 #include "oops/fieldStreams.hpp" 45 #include "oops/instanceKlass.hpp" 46 #include "oops/instanceMirrorKlass.hpp" 47 #include "oops/klass.hpp" 48 #include "oops/method.inline.hpp" 49 #include "oops/objArrayOop.inline.hpp" 50 #include "oops/oop.inline.hpp" 51 #include "oops/symbol.hpp" 52 #include "oops/typeArrayOop.inline.hpp" 53 #include "prims/jvmtiExport.hpp" 54 #include "prims/resolvedMethodTable.hpp" 55 #include "runtime/fieldDescriptor.inline.hpp" 56 #include "runtime/frame.inline.hpp" 57 #include "runtime/handles.inline.hpp" 58 #include "runtime/interfaceSupport.inline.hpp" 59 #include "runtime/java.hpp" 60 #include "runtime/javaCalls.hpp" 61 #include "runtime/jniHandles.inline.hpp" 62 #include "runtime/safepoint.hpp" 63 #include "runtime/safepointVerifiers.hpp" 64 #include "runtime/thread.inline.hpp" 65 #include "runtime/vframe.inline.hpp" 66 #include "utilities/align.hpp" 67 #include "utilities/preserveException.hpp" 68 #if INCLUDE_JVMCI 69 #include "jvmci/jvmciJavaClasses.hpp" 70 #endif 71 72 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 73 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 74 75 #if INCLUDE_CDS 76 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \ 77 f->do_u4((u4*)&_##name##_offset); 78 #endif 79 80 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 81 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 82 83 InjectedField JavaClasses::_injected_fields[] = { 84 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 85 }; 86 87 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 88 return _injected_fields[id].compute_offset(); 89 } 90 91 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 92 *field_count = 0; 93 94 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 95 if (sid == vmSymbols::NO_SID) { 96 // Only well known classes can inject fields 97 return NULL; 98 } 99 100 int count = 0; 101 int start = -1; 102 103 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 104 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 105 count++; \ 106 if (start == -1) start = klass##_##name##_enum; \ 107 } 108 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 109 #undef LOOKUP_INJECTED_FIELD 110 111 if (start != -1) { 112 *field_count = count; 113 return _injected_fields + start; 114 } 115 return NULL; 116 } 117 118 119 // Helpful routine for computing field offsets at run time rather than hardcoding them 120 // Finds local fields only, including static fields. Static field offsets are from the 121 // beginning of the mirror. 122 static void compute_offset(int &dest_offset, 123 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol, 124 bool is_static = false) { 125 fieldDescriptor fd; 126 if (ik == NULL) { 127 ResourceMark rm; 128 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string()); 129 vm_exit_during_initialization("Invalid layout of well-known class"); 130 } 131 132 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) { 133 ResourceMark rm; 134 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(), 135 name_symbol->as_C_string(), signature_symbol->as_C_string()); 136 #ifndef PRODUCT 137 // Prints all fields and offsets 138 Log(class) lt; 139 LogStream ls(lt.error()); 140 ik->print_on(&ls); 141 #endif //PRODUCT 142 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 143 } 144 dest_offset = fd.offset(); 145 } 146 147 // Overloading to pass name as a string. 148 static void compute_offset(int& dest_offset, InstanceKlass* ik, 149 const char* name_string, Symbol* signature_symbol, 150 bool is_static = false) { 151 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string)); 152 if (name == NULL) { 153 ResourceMark rm; 154 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string); 155 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name()); 156 } 157 compute_offset(dest_offset, ik, name, signature_symbol, is_static); 158 } 159 160 int java_lang_String::value_offset = 0; 161 int java_lang_String::hash_offset = 0; 162 int java_lang_String::coder_offset = 0; 163 164 bool java_lang_String::initialized = false; 165 166 bool java_lang_String::is_instance(oop obj) { 167 return is_instance_inlined(obj); 168 } 169 170 #if INCLUDE_CDS 171 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \ 172 f->do_u4((u4*)&offset) 173 #endif 174 175 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \ 176 compute_offset(offset, klass, name, vmSymbols::signature(), is_static) 177 178 #define STRING_FIELDS_DO(macro) \ 179 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \ 180 macro(hash_offset, k, "hash", int_signature, false); \ 181 macro(coder_offset, k, "coder", byte_signature, false) 182 183 void java_lang_String::compute_offsets() { 184 if (initialized) { 185 return; 186 } 187 188 InstanceKlass* k = SystemDictionary::String_klass(); 189 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 190 191 initialized = true; 192 } 193 194 #if INCLUDE_CDS 195 void java_lang_String::serialize_offsets(SerializeClosure* f) { 196 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 197 f->do_u4((u4*)&initialized); 198 } 199 #endif 200 201 class CompactStringsFixup : public FieldClosure { 202 private: 203 bool _value; 204 205 public: 206 CompactStringsFixup(bool value) : _value(value) {} 207 208 void do_field(fieldDescriptor* fd) { 209 if (fd->name() == vmSymbols::compact_strings_name()) { 210 oop mirror = fd->field_holder()->java_mirror(); 211 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String"); 212 assert(mirror != NULL, "String must have mirror already"); 213 mirror->bool_field_put(fd->offset(), _value); 214 } 215 } 216 }; 217 218 void java_lang_String::set_compact_strings(bool value) { 219 CompactStringsFixup fix(value); 220 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix); 221 } 222 223 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 224 assert(initialized, "Must be initialized"); 225 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 226 227 // Create the String object first, so there's a chance that the String 228 // and the char array it points to end up in the same cache line. 229 oop obj; 230 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH); 231 232 // Create the char array. The String object must be handlized here 233 // because GC can happen as a result of the allocation attempt. 234 Handle h_obj(THREAD, obj); 235 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 236 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 237 238 // Point the String at the char array 239 obj = h_obj(); 240 set_value(obj, buffer); 241 // No need to zero the offset, allocation zero'ed the entire String object 242 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 243 return h_obj; 244 } 245 246 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) { 247 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 248 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 249 typeArrayOop buffer = value(h_obj()); 250 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 251 if (is_latin1) { 252 for (int index = 0; index < length; index++) { 253 buffer->byte_at_put(index, (jbyte)unicode[index]); 254 } 255 } else { 256 for (int index = 0; index < length; index++) { 257 buffer->char_at_put(index, unicode[index]); 258 } 259 } 260 261 #ifdef ASSERT 262 { 263 ResourceMark rm; 264 char* expected = UNICODE::as_utf8(unicode, length); 265 char* actual = as_utf8_string(h_obj()); 266 if (strcmp(expected, actual) != 0) { 267 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual); 268 ShouldNotReachHere(); 269 } 270 } 271 #endif 272 273 return h_obj; 274 } 275 276 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) { 277 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 278 return h_obj(); 279 } 280 281 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 282 if (utf8_str == NULL) { 283 return Handle(); 284 } 285 bool has_multibyte, is_latin1; 286 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 287 if (!CompactStrings) { 288 has_multibyte = true; 289 is_latin1 = false; 290 } 291 292 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 293 if (length > 0) { 294 if (!has_multibyte) { 295 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 296 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 297 } else if (is_latin1) { 298 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 299 } else { 300 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 301 } 302 } 303 304 #ifdef ASSERT 305 // This check is too strict because the input string is not necessarily valid UTF8. 306 // For example, it may be created with arbitrary content via jni_NewStringUTF. 307 /* 308 { 309 ResourceMark rm; 310 const char* expected = utf8_str; 311 char* actual = as_utf8_string(h_obj()); 312 if (strcmp(expected, actual) != 0) { 313 tty->print_cr("String conversion failure: %s --> %s", expected, actual); 314 ShouldNotReachHere(); 315 } 316 } 317 */ 318 #endif 319 320 return h_obj; 321 } 322 323 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 324 Handle h_obj = create_from_str(utf8_str, CHECK_0); 325 return h_obj(); 326 } 327 328 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 329 const char* utf8_str = (char*)symbol->bytes(); 330 int utf8_len = symbol->utf8_length(); 331 332 bool has_multibyte, is_latin1; 333 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 334 if (!CompactStrings) { 335 has_multibyte = true; 336 is_latin1 = false; 337 } 338 339 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 340 if (length > 0) { 341 if (!has_multibyte) { 342 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 343 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 344 } else if (is_latin1) { 345 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 346 } else { 347 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 348 } 349 } 350 351 #ifdef ASSERT 352 { 353 ResourceMark rm; 354 const char* expected = symbol->as_utf8(); 355 char* actual = as_utf8_string(h_obj()); 356 if (strncmp(expected, actual, utf8_len) != 0) { 357 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual); 358 ShouldNotReachHere(); 359 } 360 } 361 #endif 362 363 return h_obj; 364 } 365 366 // Converts a C string to a Java String based on current encoding 367 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 368 assert(str != NULL, "bad arguments"); 369 370 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 371 static to_java_string_fn_t _to_java_string_fn = NULL; 372 373 if (_to_java_string_fn == NULL) { 374 void *lib_handle = os::native_java_library(); 375 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 376 if (_to_java_string_fn == NULL) { 377 fatal("NewStringPlatform missing"); 378 } 379 } 380 381 jstring js = NULL; 382 { JavaThread* thread = (JavaThread*)THREAD; 383 assert(thread->is_Java_thread(), "must be java thread"); 384 HandleMark hm(thread); 385 ThreadToNativeFromVM ttn(thread); 386 js = (_to_java_string_fn)(thread->jni_environment(), str); 387 } 388 return Handle(THREAD, JNIHandles::resolve(js)); 389 } 390 391 // Converts a Java String to a native C string that can be used for 392 // native OS calls. 393 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 394 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 395 static to_platform_string_fn_t _to_platform_string_fn = NULL; 396 397 if (_to_platform_string_fn == NULL) { 398 void *lib_handle = os::native_java_library(); 399 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 400 if (_to_platform_string_fn == NULL) { 401 fatal("GetStringPlatformChars missing"); 402 } 403 } 404 405 char *native_platform_string; 406 { JavaThread* thread = (JavaThread*)THREAD; 407 assert(thread->is_Java_thread(), "must be java thread"); 408 JNIEnv *env = thread->jni_environment(); 409 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 410 bool is_copy; 411 HandleMark hm(thread); 412 ThreadToNativeFromVM ttn(thread); 413 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 414 assert(is_copy == JNI_TRUE, "is_copy value changed"); 415 JNIHandles::destroy_local(js); 416 } 417 return native_platform_string; 418 } 419 420 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 421 oop obj = java_string(); 422 // Typical usage is to convert all '/' to '.' in string. 423 typeArrayOop value = java_lang_String::value(obj); 424 int length = java_lang_String::length(obj); 425 bool is_latin1 = java_lang_String::is_latin1(obj); 426 427 // First check if any from_char exist 428 int index; // Declared outside, used later 429 for (index = 0; index < length; index++) { 430 jchar c = !is_latin1 ? value->char_at(index) : 431 ((jchar) value->byte_at(index)) & 0xff; 432 if (c == from_char) { 433 break; 434 } 435 } 436 if (index == length) { 437 // No from_char, so do not copy. 438 return java_string; 439 } 440 441 // Check if result string will be latin1 442 bool to_is_latin1 = false; 443 444 // Replacement char must be latin1 445 if (CompactStrings && UNICODE::is_latin1(to_char)) { 446 if (is_latin1) { 447 // Source string is latin1 as well 448 to_is_latin1 = true; 449 } else if (!UNICODE::is_latin1(from_char)) { 450 // We are replacing an UTF16 char. Scan string to 451 // check if result can be latin1 encoded. 452 to_is_latin1 = true; 453 for (index = 0; index < length; index++) { 454 jchar c = value->char_at(index); 455 if (c != from_char && !UNICODE::is_latin1(c)) { 456 to_is_latin1 = false; 457 break; 458 } 459 } 460 } 461 } 462 463 // Create new UNICODE (or byte) buffer. Must handlize value because GC 464 // may happen during String and char array creation. 465 typeArrayHandle h_value(THREAD, value); 466 Handle string = basic_create(length, to_is_latin1, CHECK_NH); 467 typeArrayOop from_buffer = h_value(); 468 typeArrayOop to_buffer = java_lang_String::value(string()); 469 470 // Copy contents 471 for (index = 0; index < length; index++) { 472 jchar c = (!is_latin1) ? from_buffer->char_at(index) : 473 ((jchar) from_buffer->byte_at(index)) & 0xff; 474 if (c == from_char) { 475 c = to_char; 476 } 477 if (!to_is_latin1) { 478 to_buffer->char_at_put(index, c); 479 } else { 480 to_buffer->byte_at_put(index, (jbyte) c); 481 } 482 } 483 return string; 484 } 485 486 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 487 typeArrayOop value = java_lang_String::value(java_string); 488 length = java_lang_String::length(java_string); 489 bool is_latin1 = java_lang_String::is_latin1(java_string); 490 491 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 492 if (result != NULL) { 493 if (!is_latin1) { 494 for (int index = 0; index < length; index++) { 495 result[index] = value->char_at(index); 496 } 497 } else { 498 for (int index = 0; index < length; index++) { 499 result[index] = ((jchar) value->byte_at(index)) & 0xff; 500 } 501 } 502 } else { 503 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 504 } 505 return result; 506 } 507 508 unsigned int java_lang_String::hash_code(oop java_string) { 509 int length = java_lang_String::length(java_string); 510 // Zero length string will hash to zero with String.hashCode() function. 511 if (length == 0) return 0; 512 513 typeArrayOop value = java_lang_String::value(java_string); 514 bool is_latin1 = java_lang_String::is_latin1(java_string); 515 516 if (is_latin1) { 517 return java_lang_String::hash_code(value->byte_at_addr(0), length); 518 } else { 519 return java_lang_String::hash_code(value->char_at_addr(0), length); 520 } 521 } 522 523 char* java_lang_String::as_quoted_ascii(oop java_string) { 524 typeArrayOop value = java_lang_String::value(java_string); 525 int length = java_lang_String::length(java_string); 526 bool is_latin1 = java_lang_String::is_latin1(java_string); 527 528 if (length == 0) return NULL; 529 530 char* result; 531 int result_length; 532 if (!is_latin1) { 533 jchar* base = value->char_at_addr(0); 534 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 535 result = NEW_RESOURCE_ARRAY(char, result_length); 536 UNICODE::as_quoted_ascii(base, length, result, result_length); 537 } else { 538 jbyte* base = value->byte_at_addr(0); 539 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 540 result = NEW_RESOURCE_ARRAY(char, result_length); 541 UNICODE::as_quoted_ascii(base, length, result, result_length); 542 } 543 assert(result_length >= length + 1, "must not be shorter"); 544 assert(result_length == (int)strlen(result) + 1, "must match"); 545 return result; 546 } 547 548 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) { 549 typeArrayOop value = java_lang_String::value(java_string); 550 int length = java_lang_String::length(java_string); 551 bool is_latin1 = java_lang_String::is_latin1(java_string); 552 if (!is_latin1) { 553 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 554 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 555 return sym; 556 } else { 557 ResourceMark rm; 558 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 559 const char* base = UNICODE::as_utf8(position, length); 560 Symbol* sym = SymbolTable::lookup(base, length, THREAD); 561 return sym; 562 } 563 } 564 565 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 566 typeArrayOop value = java_lang_String::value(java_string); 567 int length = java_lang_String::length(java_string); 568 bool is_latin1 = java_lang_String::is_latin1(java_string); 569 if (!is_latin1) { 570 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 571 return SymbolTable::probe_unicode(base, length); 572 } else { 573 ResourceMark rm; 574 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 575 const char* base = UNICODE::as_utf8(position, length); 576 return SymbolTable::probe(base, length); 577 } 578 } 579 580 int java_lang_String::utf8_length(oop java_string) { 581 typeArrayOop value = java_lang_String::value(java_string); 582 int length = java_lang_String::length(java_string); 583 bool is_latin1 = java_lang_String::is_latin1(java_string); 584 if (length == 0) { 585 return 0; 586 } 587 if (!is_latin1) { 588 return UNICODE::utf8_length(value->char_at_addr(0), length); 589 } else { 590 return UNICODE::utf8_length(value->byte_at_addr(0), length); 591 } 592 } 593 594 char* java_lang_String::as_utf8_string(oop java_string) { 595 typeArrayOop value = java_lang_String::value(java_string); 596 int length = java_lang_String::length(java_string); 597 bool is_latin1 = java_lang_String::is_latin1(java_string); 598 if (!is_latin1) { 599 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 600 return UNICODE::as_utf8(position, length); 601 } else { 602 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 603 return UNICODE::as_utf8(position, length); 604 } 605 } 606 607 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 608 typeArrayOop value = java_lang_String::value(java_string); 609 int length = java_lang_String::length(java_string); 610 bool is_latin1 = java_lang_String::is_latin1(java_string); 611 if (!is_latin1) { 612 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 613 return UNICODE::as_utf8(position, length, buf, buflen); 614 } else { 615 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 616 return UNICODE::as_utf8(position, length, buf, buflen); 617 } 618 } 619 620 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 621 typeArrayOop value = java_lang_String::value(java_string); 622 int length = java_lang_String::length(java_string); 623 assert(start + len <= length, "just checking"); 624 bool is_latin1 = java_lang_String::is_latin1(java_string); 625 if (!is_latin1) { 626 jchar* position = value->char_at_addr(start); 627 return UNICODE::as_utf8(position, len); 628 } else { 629 jbyte* position = value->byte_at_addr(start); 630 return UNICODE::as_utf8(position, len); 631 } 632 } 633 634 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) { 635 typeArrayOop value = java_lang_String::value(java_string); 636 int length = java_lang_String::length(java_string); 637 assert(start + len <= length, "just checking"); 638 bool is_latin1 = java_lang_String::is_latin1(java_string); 639 if (!is_latin1) { 640 jchar* position = value->char_at_addr(start); 641 return UNICODE::as_utf8(position, len, buf, buflen); 642 } else { 643 jbyte* position = value->byte_at_addr(start); 644 return UNICODE::as_utf8(position, len, buf, buflen); 645 } 646 } 647 648 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) { 649 assert(java_string->klass() == SystemDictionary::String_klass(), 650 "must be java_string"); 651 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 652 int length = java_lang_String::length(java_string); 653 if (length != len) { 654 return false; 655 } 656 bool is_latin1 = java_lang_String::is_latin1(java_string); 657 if (!is_latin1) { 658 for (int i = 0; i < len; i++) { 659 if (value->char_at(i) != chars[i]) { 660 return false; 661 } 662 } 663 } else { 664 for (int i = 0; i < len; i++) { 665 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 666 return false; 667 } 668 } 669 } 670 return true; 671 } 672 673 bool java_lang_String::equals(oop str1, oop str2) { 674 assert(str1->klass() == SystemDictionary::String_klass(), 675 "must be java String"); 676 assert(str2->klass() == SystemDictionary::String_klass(), 677 "must be java String"); 678 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1); 679 int length1 = java_lang_String::length(str1); 680 bool is_latin1 = java_lang_String::is_latin1(str1); 681 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2); 682 int length2 = java_lang_String::length(str2); 683 bool is_latin2 = java_lang_String::is_latin1(str2); 684 685 if ((length1 != length2) || (is_latin1 != is_latin2)) { 686 // Strings of different size or with different 687 // coders are never equal. 688 return false; 689 } 690 int blength1 = value1->length(); 691 for (int i = 0; i < blength1; i++) { 692 if (value1->byte_at(i) != value2->byte_at(i)) { 693 return false; 694 } 695 } 696 return true; 697 } 698 699 void java_lang_String::print(oop java_string, outputStream* st) { 700 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 701 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 702 703 if (value == NULL) { 704 // This can happen if, e.g., printing a String 705 // object before its initializer has been called 706 st->print("NULL"); 707 return; 708 } 709 710 int length = java_lang_String::length(java_string); 711 bool is_latin1 = java_lang_String::is_latin1(java_string); 712 713 st->print("\""); 714 for (int index = 0; index < length; index++) { 715 st->print("%c", (!is_latin1) ? value->char_at(index) : 716 ((jchar) value->byte_at(index)) & 0xff ); 717 } 718 st->print("\""); 719 } 720 721 722 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 723 assert(mirror.not_null() && fd->is_static(), "just checking"); 724 if (fd->has_initial_value()) { 725 BasicType t = fd->field_type(); 726 switch (t) { 727 case T_BYTE: 728 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 729 break; 730 case T_BOOLEAN: 731 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 732 break; 733 case T_CHAR: 734 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 735 break; 736 case T_SHORT: 737 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 738 break; 739 case T_INT: 740 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 741 break; 742 case T_FLOAT: 743 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 744 break; 745 case T_DOUBLE: 746 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 747 break; 748 case T_LONG: 749 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 750 break; 751 case T_OBJECT: 752 { 753 assert(fd->signature() == vmSymbols::string_signature(), 754 "just checking"); 755 if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) { 756 // Archive the String field and update the pointer. 757 oop s = mirror()->obj_field(fd->offset()); 758 oop archived_s = StringTable::create_archived_string(s, CHECK); 759 mirror()->obj_field_put(fd->offset(), archived_s); 760 } else { 761 oop string = fd->string_initial_value(CHECK); 762 mirror()->obj_field_put(fd->offset(), string); 763 } 764 } 765 break; 766 default: 767 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 768 "Illegal ConstantValue attribute in class file"); 769 } 770 } 771 } 772 773 774 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 775 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 776 777 // If the offset was read from the shared archive, it was fixed up already 778 if (!k->is_shared()) { 779 if (k->is_instance_klass()) { 780 // During bootstrap, java.lang.Class wasn't loaded so static field 781 // offsets were computed without the size added it. Go back and 782 // update all the static field offsets to included the size. 783 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) { 784 if (fs.access_flags().is_static()) { 785 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 786 fs.set_offset(real_offset); 787 } 788 } 789 } 790 } 791 792 if (k->is_shared() && k->has_raw_archived_mirror()) { 793 if (HeapShared::open_archive_heap_region_mapped()) { 794 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK); 795 assert(present, "Missing archived mirror for %s", k->external_name()); 796 return; 797 } else { 798 k->set_java_mirror_handle(NULL); 799 k->clear_has_raw_archived_mirror(); 800 } 801 } 802 create_mirror(k, Handle(), Handle(), Handle(), CHECK); 803 } 804 805 void java_lang_Class::initialize_mirror_fields(Klass* k, 806 Handle mirror, 807 Handle protection_domain, 808 TRAPS) { 809 // Allocate a simple java object for a lock. 810 // This needs to be a java object because during class initialization 811 // it can be held across a java call. 812 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 813 set_init_lock(mirror(), r); 814 815 // Set protection domain also 816 set_protection_domain(mirror(), protection_domain()); 817 818 // Initialize static fields 819 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 820 } 821 822 // Set the java.lang.Module module field in the java_lang_Class mirror 823 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) { 824 if (module.is_null()) { 825 // During startup, the module may be NULL only if java.base has not been defined yet. 826 // Put the class on the fixup_module_list to patch later when the java.lang.Module 827 // for java.base is known. 828 assert(!Universe::is_module_initialized(), "Incorrect java.lang.Module pre module system initialization"); 829 830 bool javabase_was_defined = false; 831 { 832 MutexLocker m1(Module_lock, THREAD); 833 // Keep list of classes needing java.base module fixup 834 if (!ModuleEntryTable::javabase_defined()) { 835 assert(k->java_mirror() != NULL, "Class's mirror is null"); 836 k->class_loader_data()->inc_keep_alive(); 837 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized"); 838 fixup_module_field_list()->push(k); 839 } else { 840 javabase_was_defined = true; 841 } 842 } 843 844 // If java.base was already defined then patch this particular class with java.base. 845 if (javabase_was_defined) { 846 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 847 assert(javabase_entry != NULL && javabase_entry->module() != NULL, 848 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 849 Handle javabase_handle(THREAD, javabase_entry->module()); 850 set_module(mirror(), javabase_handle()); 851 } 852 } else { 853 assert(Universe::is_module_initialized() || 854 (ModuleEntryTable::javabase_defined() && 855 (oopDesc::equals(module(), ModuleEntryTable::javabase_moduleEntry()->module()))), 856 "Incorrect java.lang.Module specification while creating mirror"); 857 set_module(mirror(), module()); 858 } 859 } 860 861 // Statically allocate fixup lists because they always get created. 862 void java_lang_Class::allocate_fixup_lists() { 863 GrowableArray<Klass*>* mirror_list = 864 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 865 set_fixup_mirror_list(mirror_list); 866 867 GrowableArray<Klass*>* module_list = 868 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true); 869 set_fixup_module_field_list(module_list); 870 } 871 872 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 873 Handle module, Handle protection_domain, TRAPS) { 874 assert(k != NULL, "Use create_basic_type_mirror for primitive types"); 875 assert(k->java_mirror() == NULL, "should only assign mirror once"); 876 877 // Use this moment of initialization to cache modifier_flags also, 878 // to support Class.getModifiers(). Instance classes recalculate 879 // the cached flags after the class file is parsed, but before the 880 // class is put into the system dictionary. 881 int computed_modifiers = k->compute_modifier_flags(CHECK); 882 k->set_modifier_flags(computed_modifiers); 883 // Class_klass has to be loaded because it is used to allocate 884 // the mirror. 885 if (SystemDictionary::Class_klass_loaded()) { 886 // Allocate mirror (java.lang.Class instance) 887 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 888 Handle mirror(THREAD, mirror_oop); 889 Handle comp_mirror; 890 891 // Setup indirection from mirror->klass 892 java_lang_Class::set_klass(mirror(), k); 893 894 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 895 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 896 897 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 898 899 // It might also have a component mirror. This mirror must already exist. 900 if (k->is_array_klass()) { 901 if (k->is_typeArray_klass()) { 902 BasicType type = TypeArrayKlass::cast(k)->element_type(); 903 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 904 } else { 905 assert(k->is_objArray_klass(), "Must be"); 906 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 907 assert(element_klass != NULL, "Must have an element klass"); 908 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 909 } 910 assert(comp_mirror() != NULL, "must have a mirror"); 911 912 // Two-way link between the array klass and its component mirror: 913 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 914 set_component_mirror(mirror(), comp_mirror()); 915 // See below for ordering dependencies between field array_klass in component mirror 916 // and java_mirror in this klass. 917 } else { 918 assert(k->is_instance_klass(), "Must be"); 919 920 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 921 if (HAS_PENDING_EXCEPTION) { 922 // If any of the fields throws an exception like OOM remove the klass field 923 // from the mirror so GC doesn't follow it after the klass has been deallocated. 924 // This mirror looks like a primitive type, which logically it is because it 925 // it represents no class. 926 java_lang_Class::set_klass(mirror(), NULL); 927 return; 928 } 929 } 930 931 // set the classLoader field in the java_lang_Class instance 932 assert(oopDesc::equals(class_loader(), k->class_loader()), "should be same"); 933 set_class_loader(mirror(), class_loader()); 934 935 // Setup indirection from klass->mirror 936 // after any exceptions can happen during allocations. 937 k->set_java_mirror(mirror); 938 939 // Set the module field in the java_lang_Class instance. This must be done 940 // after the mirror is set. 941 set_mirror_module_field(k, mirror, module, THREAD); 942 943 if (comp_mirror() != NULL) { 944 // Set after k->java_mirror() is published, because compiled code running 945 // concurrently doesn't expect a k to have a null java_mirror. 946 release_set_array_klass(comp_mirror(), k); 947 } 948 } else { 949 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized"); 950 fixup_mirror_list()->push(k); 951 } 952 } 953 954 #if INCLUDE_CDS_JAVA_HEAP 955 // Clears mirror fields. Static final fields with initial values are reloaded 956 // from constant pool. The object identity hash is in the object header and is 957 // not affected. 958 class ResetMirrorField: public FieldClosure { 959 private: 960 Handle _m; 961 962 public: 963 ResetMirrorField(Handle mirror) : _m(mirror) {} 964 965 void do_field(fieldDescriptor* fd) { 966 assert(DumpSharedSpaces, "dump time only"); 967 assert(_m.not_null(), "Mirror cannot be NULL"); 968 969 if (fd->is_static() && fd->has_initial_value()) { 970 initialize_static_field(fd, _m, Thread::current()); 971 return; 972 } 973 974 BasicType ft = fd->field_type(); 975 switch (ft) { 976 case T_BYTE: 977 _m()->byte_field_put(fd->offset(), 0); 978 break; 979 case T_CHAR: 980 _m()->char_field_put(fd->offset(), 0); 981 break; 982 case T_DOUBLE: 983 _m()->double_field_put(fd->offset(), 0); 984 break; 985 case T_FLOAT: 986 _m()->float_field_put(fd->offset(), 0); 987 break; 988 case T_INT: 989 _m()->int_field_put(fd->offset(), 0); 990 break; 991 case T_LONG: 992 _m()->long_field_put(fd->offset(), 0); 993 break; 994 case T_SHORT: 995 _m()->short_field_put(fd->offset(), 0); 996 break; 997 case T_BOOLEAN: 998 _m()->bool_field_put(fd->offset(), false); 999 break; 1000 case T_ARRAY: 1001 case T_OBJECT: { 1002 // It might be useful to cache the String field, but 1003 // for now just clear out any reference field 1004 oop o = _m()->obj_field(fd->offset()); 1005 _m()->obj_field_put(fd->offset(), NULL); 1006 break; 1007 } 1008 default: 1009 ShouldNotReachHere(); 1010 break; 1011 } 1012 } 1013 }; 1014 1015 void java_lang_Class::archive_basic_type_mirrors(TRAPS) { 1016 assert(HeapShared::is_heap_object_archiving_allowed(), 1017 "HeapShared::is_heap_object_archiving_allowed() must be true"); 1018 1019 for (int t = 0; t <= T_VOID; t++) { 1020 oop m = Universe::_mirrors[t]; 1021 if (m != NULL) { 1022 // Update the field at _array_klass_offset to point to the relocated array klass. 1023 oop archived_m = HeapShared::archive_heap_object(m, THREAD); 1024 assert(archived_m != NULL, "sanity"); 1025 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset)); 1026 assert(ak != NULL || t == T_VOID, "should not be NULL"); 1027 if (ak != NULL) { 1028 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak); 1029 archived_m->metadata_field_put(_array_klass_offset, reloc_ak); 1030 } 1031 1032 // Clear the fields. Just to be safe 1033 Klass *k = m->klass(); 1034 Handle archived_mirror_h(THREAD, archived_m); 1035 ResetMirrorField reset(archived_mirror_h); 1036 InstanceKlass::cast(k)->do_nonstatic_fields(&reset); 1037 1038 log_trace(cds, heap, mirror)( 1039 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1040 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m)); 1041 1042 Universe::_mirrors[t] = archived_m; 1043 } 1044 } 1045 1046 assert(Universe::_mirrors[T_INT] != NULL && 1047 Universe::_mirrors[T_FLOAT] != NULL && 1048 Universe::_mirrors[T_DOUBLE] != NULL && 1049 Universe::_mirrors[T_BYTE] != NULL && 1050 Universe::_mirrors[T_BOOLEAN] != NULL && 1051 Universe::_mirrors[T_CHAR] != NULL && 1052 Universe::_mirrors[T_LONG] != NULL && 1053 Universe::_mirrors[T_SHORT] != NULL && 1054 Universe::_mirrors[T_VOID] != NULL, "sanity"); 1055 1056 Universe::set_int_mirror(Universe::_mirrors[T_INT]); 1057 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]); 1058 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]); 1059 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]); 1060 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]); 1061 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]); 1062 Universe::set_long_mirror(Universe::_mirrors[T_LONG]); 1063 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]); 1064 Universe::set_void_mirror(Universe::_mirrors[T_VOID]); 1065 } 1066 1067 // 1068 // After the mirror object is successfully archived, the archived 1069 // klass is set with _has_archived_raw_mirror flag. 1070 // 1071 // The _has_archived_raw_mirror flag is cleared at runtime when the 1072 // archived mirror is restored. If archived java heap data cannot 1073 // be used at runtime, new mirror object is created for the shared 1074 // class. The _has_archived_raw_mirror is cleared also during the process. 1075 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) { 1076 assert(HeapShared::is_heap_object_archiving_allowed(), 1077 "HeapShared::is_heap_object_archiving_allowed() must be true"); 1078 1079 // Mirror is already archived 1080 if (k->has_raw_archived_mirror()) { 1081 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror"); 1082 return k->archived_java_mirror_raw(); 1083 } 1084 1085 // No mirror 1086 oop mirror = k->java_mirror(); 1087 if (mirror == NULL) { 1088 return NULL; 1089 } 1090 1091 if (k->is_instance_klass()) { 1092 InstanceKlass *ik = InstanceKlass::cast(k); 1093 assert(ik->signers() == NULL && !k->has_signer_and_not_archived(), 1094 "class with signer cannot be supported"); 1095 1096 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() || 1097 ik->is_shared_app_class())) { 1098 // Archiving mirror for classes from non-builtin loaders is not 1099 // supported. Clear the _java_mirror within the archived class. 1100 k->set_java_mirror_handle(NULL); 1101 return NULL; 1102 } 1103 } 1104 1105 // Now start archiving the mirror object 1106 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD); 1107 if (archived_mirror == NULL) { 1108 return NULL; 1109 } 1110 1111 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD); 1112 if (archived_mirror == NULL) { 1113 return NULL; 1114 } 1115 1116 k->set_archived_java_mirror_raw(archived_mirror); 1117 1118 k->set_has_raw_archived_mirror(); 1119 1120 ResourceMark rm; 1121 log_trace(cds, heap, mirror)( 1122 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1123 k->external_name(), p2i(mirror), p2i(archived_mirror)); 1124 1125 return archived_mirror; 1126 } 1127 1128 // The process is based on create_mirror(). 1129 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror, 1130 oop archived_mirror, 1131 Thread *THREAD) { 1132 // Clear nonstatic fields in archived mirror. Some of the fields will be set 1133 // to archived metadata and objects below. 1134 Klass *c = archived_mirror->klass(); 1135 Handle archived_mirror_h(THREAD, archived_mirror); 1136 ResetMirrorField reset(archived_mirror_h); 1137 InstanceKlass::cast(c)->do_nonstatic_fields(&reset); 1138 1139 if (k->is_array_klass()) { 1140 oop archived_comp_mirror; 1141 if (k->is_typeArray_klass()) { 1142 // The primitive type mirrors are already archived. Get the archived mirror. 1143 oop comp_mirror = java_lang_Class::component_mirror(mirror); 1144 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror); 1145 assert(archived_comp_mirror != NULL, "Must be"); 1146 } else { 1147 assert(k->is_objArray_klass(), "Must be"); 1148 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1149 assert(element_klass != NULL, "Must have an element klass"); 1150 archived_comp_mirror = archive_mirror(element_klass, THREAD); 1151 if (archived_comp_mirror == NULL) { 1152 return NULL; 1153 } 1154 } 1155 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror); 1156 } else { 1157 assert(k->is_instance_klass(), "Must be"); 1158 1159 // Reset local static fields in the mirror 1160 InstanceKlass::cast(k)->do_local_static_fields(&reset); 1161 1162 java_lang_Class:set_init_lock(archived_mirror, NULL); 1163 1164 set_protection_domain(archived_mirror, NULL); 1165 } 1166 1167 // clear class loader and mirror_module_field 1168 set_class_loader(archived_mirror, NULL); 1169 set_module(archived_mirror, NULL); 1170 1171 // The archived mirror's field at _klass_offset is still pointing to the original 1172 // klass. Updated the field in the archived mirror to point to the relocated 1173 // klass in the archive. 1174 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror)); 1175 log_debug(cds, heap, mirror)( 1176 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1177 p2i(as_Klass(mirror)), p2i(reloc_k)); 1178 archived_mirror->metadata_field_put(_klass_offset, reloc_k); 1179 1180 // The field at _array_klass_offset is pointing to the original one dimension 1181 // higher array klass if exists. Relocate the pointer. 1182 Klass *arr = array_klass_acquire(mirror); 1183 if (arr != NULL) { 1184 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr); 1185 log_debug(cds, heap, mirror)( 1186 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1187 p2i(arr), p2i(reloc_arr)); 1188 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr); 1189 } 1190 return archived_mirror; 1191 } 1192 1193 // Returns true if the mirror is updated, false if no archived mirror 1194 // data is present. After the archived mirror object is restored, the 1195 // shared klass' _has_raw_archived_mirror flag is cleared. 1196 bool java_lang_Class::restore_archived_mirror(Klass *k, 1197 Handle class_loader, Handle module, 1198 Handle protection_domain, TRAPS) { 1199 // Postpone restoring archived mirror until java.lang.Class is loaded. Please 1200 // see more details in SystemDictionary::resolve_well_known_classes(). 1201 if (!SystemDictionary::Class_klass_loaded()) { 1202 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized"); 1203 fixup_mirror_list()->push(k); 1204 return true; 1205 } 1206 1207 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow()); 1208 1209 if (m == NULL) { 1210 return false; 1211 } 1212 1213 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m)); 1214 1215 // mirror is archived, restore 1216 assert(HeapShared::is_archived_object(m), "must be archived mirror object"); 1217 Handle mirror(THREAD, m); 1218 1219 if (!k->is_array_klass()) { 1220 // - local static final fields with initial values were initialized at dump time 1221 1222 // create the init_lock 1223 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false)); 1224 set_init_lock(mirror(), r); 1225 1226 if (protection_domain.not_null()) { 1227 set_protection_domain(mirror(), protection_domain()); 1228 } 1229 } 1230 1231 assert(class_loader() == k->class_loader(), "should be same"); 1232 if (class_loader.not_null()) { 1233 set_class_loader(mirror(), class_loader()); 1234 } 1235 1236 k->set_java_mirror(mirror); 1237 k->clear_has_raw_archived_mirror(); 1238 1239 set_mirror_module_field(k, mirror, module, THREAD); 1240 1241 ResourceMark rm; 1242 log_trace(cds, heap, mirror)( 1243 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1244 1245 return true; 1246 } 1247 #endif // INCLUDE_CDS_JAVA_HEAP 1248 1249 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1250 assert(_module_offset != 0, "must have been computed already"); 1251 java_lang_Class::set_module(k->java_mirror(), module()); 1252 } 1253 1254 int java_lang_Class::oop_size(oop java_class) { 1255 assert(_oop_size_offset != 0, "must be set"); 1256 int size = java_class->int_field(_oop_size_offset); 1257 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1258 return size; 1259 } 1260 1261 int java_lang_Class::oop_size_raw(oop java_class) { 1262 assert(_oop_size_offset != 0, "must be set"); 1263 int size = java_class->int_field_raw(_oop_size_offset); 1264 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1265 return size; 1266 } 1267 1268 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) { 1269 assert(_oop_size_offset != 0, "must be set"); 1270 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1271 *(int*)(((char*)java_class) + _oop_size_offset) = size; 1272 } 1273 1274 int java_lang_Class::static_oop_field_count(oop java_class) { 1275 assert(_static_oop_field_count_offset != 0, "must be set"); 1276 return java_class->int_field(_static_oop_field_count_offset); 1277 } 1278 1279 int java_lang_Class::static_oop_field_count_raw(oop java_class) { 1280 assert(_static_oop_field_count_offset != 0, "must be set"); 1281 return java_class->int_field_raw(_static_oop_field_count_offset); 1282 } 1283 1284 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1285 assert(_static_oop_field_count_offset != 0, "must be set"); 1286 java_class->int_field_put(_static_oop_field_count_offset, size); 1287 } 1288 1289 oop java_lang_Class::protection_domain(oop java_class) { 1290 assert(_protection_domain_offset != 0, "must be set"); 1291 return java_class->obj_field(_protection_domain_offset); 1292 } 1293 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1294 assert(_protection_domain_offset != 0, "must be set"); 1295 java_class->obj_field_put(_protection_domain_offset, pd); 1296 } 1297 1298 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1299 assert(_component_mirror_offset != 0, "must be set"); 1300 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1301 } 1302 oop java_lang_Class::component_mirror(oop java_class) { 1303 assert(_component_mirror_offset != 0, "must be set"); 1304 return java_class->obj_field(_component_mirror_offset); 1305 } 1306 1307 oop java_lang_Class::init_lock(oop java_class) { 1308 assert(_init_lock_offset != 0, "must be set"); 1309 return java_class->obj_field(_init_lock_offset); 1310 } 1311 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 1312 assert(_init_lock_offset != 0, "must be set"); 1313 java_class->obj_field_put(_init_lock_offset, init_lock); 1314 } 1315 1316 objArrayOop java_lang_Class::signers(oop java_class) { 1317 assert(_signers_offset != 0, "must be set"); 1318 return (objArrayOop)java_class->obj_field(_signers_offset); 1319 } 1320 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 1321 assert(_signers_offset != 0, "must be set"); 1322 java_class->obj_field_put(_signers_offset, (oop)signers); 1323 } 1324 1325 1326 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1327 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 1328 if (_class_loader_offset != 0) { 1329 java_class->obj_field_put(_class_loader_offset, loader); 1330 } 1331 } 1332 1333 oop java_lang_Class::class_loader(oop java_class) { 1334 assert(_class_loader_offset != 0, "must be set"); 1335 return java_class->obj_field(_class_loader_offset); 1336 } 1337 1338 oop java_lang_Class::module(oop java_class) { 1339 assert(_module_offset != 0, "must be set"); 1340 return java_class->obj_field(_module_offset); 1341 } 1342 1343 void java_lang_Class::set_module(oop java_class, oop module) { 1344 assert(_module_offset != 0, "must be set"); 1345 java_class->obj_field_put(_module_offset, module); 1346 } 1347 1348 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1349 // This should be improved by adding a field at the Java level or by 1350 // introducing a new VM klass (see comment in ClassFileParser) 1351 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 1352 if (type != T_VOID) { 1353 Klass* aklass = Universe::typeArrayKlassObj(type); 1354 assert(aklass != NULL, "correct bootstrap"); 1355 release_set_array_klass(java_class, aklass); 1356 } 1357 #ifdef ASSERT 1358 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 1359 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1360 #endif 1361 return java_class; 1362 } 1363 1364 1365 Klass* java_lang_Class::as_Klass(oop java_class) { 1366 //%note memory_2 1367 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1368 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 1369 assert(k == NULL || k->is_klass(), "type check"); 1370 return k; 1371 } 1372 1373 Klass* java_lang_Class::as_Klass_raw(oop java_class) { 1374 //%note memory_2 1375 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1376 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset)); 1377 assert(k == NULL || k->is_klass(), "type check"); 1378 return k; 1379 } 1380 1381 1382 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1383 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1384 java_class->metadata_field_put(_klass_offset, klass); 1385 } 1386 1387 1388 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1389 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1390 Symbol* name = NULL; 1391 bool is_instance = false; 1392 if (is_primitive(java_class)) { 1393 name = vmSymbols::type_signature(primitive_type(java_class)); 1394 } else { 1395 Klass* k = as_Klass(java_class); 1396 is_instance = k->is_instance_klass(); 1397 name = k->name(); 1398 } 1399 if (name == NULL) { 1400 st->print("<null>"); 1401 return; 1402 } 1403 if (is_instance) st->print("L"); 1404 st->write((char*) name->base(), (int) name->utf8_length()); 1405 if (is_instance) st->print(";"); 1406 } 1407 1408 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 1409 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1410 Symbol* name; 1411 if (is_primitive(java_class)) { 1412 name = vmSymbols::type_signature(primitive_type(java_class)); 1413 // Because this can create a new symbol, the caller has to decrement 1414 // the refcount, so make adjustment here and below for symbols returned 1415 // that are not created or incremented due to a successful lookup. 1416 name->increment_refcount(); 1417 } else { 1418 Klass* k = as_Klass(java_class); 1419 if (!k->is_instance_klass()) { 1420 name = k->name(); 1421 name->increment_refcount(); 1422 } else { 1423 ResourceMark rm; 1424 const char* sigstr = k->signature_name(); 1425 int siglen = (int) strlen(sigstr); 1426 if (!intern_if_not_found) { 1427 name = SymbolTable::probe(sigstr, siglen); 1428 } else { 1429 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 1430 } 1431 } 1432 } 1433 return name; 1434 } 1435 1436 // Returns the Java name for this Java mirror (Resource allocated) 1437 // See Klass::external_name(). 1438 // For primitive type Java mirrors, its type name is returned. 1439 const char* java_lang_Class::as_external_name(oop java_class) { 1440 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1441 const char* name = NULL; 1442 if (is_primitive(java_class)) { 1443 name = type2name(primitive_type(java_class)); 1444 } else { 1445 name = as_Klass(java_class)->external_name(); 1446 } 1447 if (name == NULL) { 1448 name = "<null>"; 1449 } 1450 return name; 1451 } 1452 1453 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1454 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1455 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass"); 1456 return k; 1457 } 1458 1459 1460 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1461 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1462 java_class->release_metadata_field_put(_array_klass_offset, klass); 1463 } 1464 1465 1466 bool java_lang_Class::is_primitive(oop java_class) { 1467 // should assert: 1468 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1469 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL); 1470 1471 #ifdef ASSERT 1472 if (is_primitive) { 1473 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1474 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()), 1475 "Should be either the T_VOID primitive or a java primitive"); 1476 } 1477 #endif 1478 1479 return is_primitive; 1480 } 1481 1482 1483 BasicType java_lang_Class::primitive_type(oop java_class) { 1484 assert(java_lang_Class::is_primitive(java_class), "just checking"); 1485 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1486 BasicType type = T_VOID; 1487 if (ak != NULL) { 1488 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1489 type = ArrayKlass::cast(ak)->element_type(); 1490 } else { 1491 assert(oopDesc::equals(java_class, Universe::void_mirror()), "only valid non-array primitive"); 1492 } 1493 assert(oopDesc::equals(Universe::java_mirror(type), java_class), "must be consistent"); 1494 return type; 1495 } 1496 1497 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1498 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1499 if (is_primitive(java_class)) { 1500 if (reference_klass != NULL) 1501 (*reference_klass) = NULL; 1502 return primitive_type(java_class); 1503 } else { 1504 if (reference_klass != NULL) 1505 (*reference_klass) = as_Klass(java_class); 1506 return T_OBJECT; 1507 } 1508 } 1509 1510 1511 oop java_lang_Class::primitive_mirror(BasicType t) { 1512 oop mirror = Universe::java_mirror(t); 1513 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 1514 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 1515 return mirror; 1516 } 1517 1518 bool java_lang_Class::offsets_computed = false; 1519 int java_lang_Class::classRedefinedCount_offset = -1; 1520 1521 #define CLASS_FIELDS_DO(macro) \ 1522 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \ 1523 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1524 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1525 macro(_module_offset, k, "module", module_signature, false) 1526 1527 void java_lang_Class::compute_offsets() { 1528 if (offsets_computed) { 1529 return; 1530 } 1531 1532 offsets_computed = true; 1533 1534 InstanceKlass* k = SystemDictionary::Class_klass(); 1535 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1536 1537 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 1538 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 1539 // GC treats them the same. 1540 _init_lock_offset = _component_mirror_offset; 1541 1542 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1543 } 1544 1545 #if INCLUDE_CDS 1546 void java_lang_Class::serialize_offsets(SerializeClosure* f) { 1547 f->do_u4((u4*)&offsets_computed); 1548 f->do_u4((u4*)&_init_lock_offset); 1549 1550 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1551 1552 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1553 } 1554 #endif 1555 1556 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1557 if (classRedefinedCount_offset == -1) { 1558 // If we don't have an offset for it then just return -1 as a marker. 1559 return -1; 1560 } 1561 1562 return the_class_mirror->int_field(classRedefinedCount_offset); 1563 } 1564 1565 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1566 if (classRedefinedCount_offset == -1) { 1567 // If we don't have an offset for it then nothing to set. 1568 return; 1569 } 1570 1571 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 1572 } 1573 1574 1575 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1576 // platform thread structure, and a eetop offset which was used for thread 1577 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1578 // merged, so in the HotSpot VM we just use the eetop field for the thread 1579 // instead of the privateInfo_offset. 1580 // 1581 // Note: The stackSize field is only present starting in 1.4. 1582 1583 int java_lang_Thread::_name_offset = 0; 1584 int java_lang_Thread::_group_offset = 0; 1585 int java_lang_Thread::_contextClassLoader_offset = 0; 1586 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 1587 int java_lang_Thread::_priority_offset = 0; 1588 int java_lang_Thread::_eetop_offset = 0; 1589 int java_lang_Thread::_daemon_offset = 0; 1590 int java_lang_Thread::_stillborn_offset = 0; 1591 int java_lang_Thread::_stackSize_offset = 0; 1592 int java_lang_Thread::_tid_offset = 0; 1593 int java_lang_Thread::_thread_status_offset = 0; 1594 int java_lang_Thread::_park_blocker_offset = 0; 1595 int java_lang_Thread::_park_event_offset = 0 ; 1596 1597 #define THREAD_FIELDS_DO(macro) \ 1598 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1599 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1600 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \ 1601 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \ 1602 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1603 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1604 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1605 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \ 1606 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1607 macro(_tid_offset, k, "tid", long_signature, false); \ 1608 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \ 1609 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \ 1610 macro(_park_event_offset, k, "nativeParkEventPointer", long_signature, false) 1611 1612 void java_lang_Thread::compute_offsets() { 1613 assert(_group_offset == 0, "offsets should be initialized only once"); 1614 1615 InstanceKlass* k = SystemDictionary::Thread_klass(); 1616 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1617 } 1618 1619 #if INCLUDE_CDS 1620 void java_lang_Thread::serialize_offsets(SerializeClosure* f) { 1621 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1622 } 1623 #endif 1624 1625 JavaThread* java_lang_Thread::thread(oop java_thread) { 1626 return (JavaThread*)java_thread->address_field(_eetop_offset); 1627 } 1628 1629 1630 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1631 java_thread->address_field_put(_eetop_offset, (address)thread); 1632 } 1633 1634 1635 oop java_lang_Thread::name(oop java_thread) { 1636 return java_thread->obj_field(_name_offset); 1637 } 1638 1639 1640 void java_lang_Thread::set_name(oop java_thread, oop name) { 1641 java_thread->obj_field_put(_name_offset, name); 1642 } 1643 1644 1645 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1646 return (ThreadPriority)java_thread->int_field(_priority_offset); 1647 } 1648 1649 1650 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1651 java_thread->int_field_put(_priority_offset, priority); 1652 } 1653 1654 1655 oop java_lang_Thread::threadGroup(oop java_thread) { 1656 return java_thread->obj_field(_group_offset); 1657 } 1658 1659 1660 bool java_lang_Thread::is_stillborn(oop java_thread) { 1661 return java_thread->bool_field(_stillborn_offset) != 0; 1662 } 1663 1664 1665 // We never have reason to turn the stillborn bit off 1666 void java_lang_Thread::set_stillborn(oop java_thread) { 1667 java_thread->bool_field_put(_stillborn_offset, true); 1668 } 1669 1670 1671 bool java_lang_Thread::is_alive(oop java_thread) { 1672 JavaThread* thr = java_lang_Thread::thread(java_thread); 1673 return (thr != NULL); 1674 } 1675 1676 1677 bool java_lang_Thread::is_daemon(oop java_thread) { 1678 return java_thread->bool_field(_daemon_offset) != 0; 1679 } 1680 1681 1682 void java_lang_Thread::set_daemon(oop java_thread) { 1683 java_thread->bool_field_put(_daemon_offset, true); 1684 } 1685 1686 oop java_lang_Thread::context_class_loader(oop java_thread) { 1687 return java_thread->obj_field(_contextClassLoader_offset); 1688 } 1689 1690 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1691 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1692 } 1693 1694 1695 jlong java_lang_Thread::stackSize(oop java_thread) { 1696 if (_stackSize_offset > 0) { 1697 return java_thread->long_field(_stackSize_offset); 1698 } else { 1699 return 0; 1700 } 1701 } 1702 1703 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1704 void java_lang_Thread::set_thread_status(oop java_thread, 1705 java_lang_Thread::ThreadStatus status) { 1706 // The threadStatus is only present starting in 1.5 1707 if (_thread_status_offset > 0) { 1708 java_thread->int_field_put(_thread_status_offset, status); 1709 } 1710 } 1711 1712 // Read thread status value from threadStatus field in java.lang.Thread java class. 1713 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1714 // Make sure the caller is operating on behalf of the VM or is 1715 // running VM code (state == _thread_in_vm). 1716 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1717 JavaThread::current()->thread_state() == _thread_in_vm, 1718 "Java Thread is not running in vm"); 1719 // The threadStatus is only present starting in 1.5 1720 if (_thread_status_offset > 0) { 1721 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1722 } else { 1723 // All we can easily figure out is if it is alive, but that is 1724 // enough info for a valid unknown status. 1725 // These aren't restricted to valid set ThreadStatus values, so 1726 // use JVMTI values and cast. 1727 JavaThread* thr = java_lang_Thread::thread(java_thread); 1728 if (thr == NULL) { 1729 // the thread hasn't run yet or is in the process of exiting 1730 return NEW; 1731 } 1732 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1733 } 1734 } 1735 1736 1737 jlong java_lang_Thread::thread_id(oop java_thread) { 1738 // The thread ID field is only present starting in 1.5 1739 if (_tid_offset > 0) { 1740 return java_thread->long_field(_tid_offset); 1741 } else { 1742 return 0; 1743 } 1744 } 1745 1746 oop java_lang_Thread::park_blocker(oop java_thread) { 1747 assert(JDK_Version::current().supports_thread_park_blocker() && 1748 _park_blocker_offset != 0, "Must support parkBlocker field"); 1749 1750 if (_park_blocker_offset > 0) { 1751 return java_thread->obj_field(_park_blocker_offset); 1752 } 1753 1754 return NULL; 1755 } 1756 1757 jlong java_lang_Thread::park_event(oop java_thread) { 1758 if (_park_event_offset > 0) { 1759 return java_thread->long_field(_park_event_offset); 1760 } 1761 return 0; 1762 } 1763 1764 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1765 if (_park_event_offset > 0) { 1766 java_thread->long_field_put(_park_event_offset, ptr); 1767 return true; 1768 } 1769 return false; 1770 } 1771 1772 1773 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1774 assert(_thread_status_offset != 0, "Must have thread status"); 1775 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1776 switch (status) { 1777 case NEW : return "NEW"; 1778 case RUNNABLE : return "RUNNABLE"; 1779 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1780 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1781 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1782 case PARKED : return "WAITING (parking)"; 1783 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1784 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1785 case TERMINATED : return "TERMINATED"; 1786 default : return "UNKNOWN"; 1787 }; 1788 } 1789 int java_lang_ThreadGroup::_parent_offset = 0; 1790 int java_lang_ThreadGroup::_name_offset = 0; 1791 int java_lang_ThreadGroup::_threads_offset = 0; 1792 int java_lang_ThreadGroup::_groups_offset = 0; 1793 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1794 int java_lang_ThreadGroup::_destroyed_offset = 0; 1795 int java_lang_ThreadGroup::_daemon_offset = 0; 1796 int java_lang_ThreadGroup::_nthreads_offset = 0; 1797 int java_lang_ThreadGroup::_ngroups_offset = 0; 1798 1799 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1800 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1801 return java_thread_group->obj_field(_parent_offset); 1802 } 1803 1804 // ("name as oop" accessor is not necessary) 1805 1806 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1807 oop name = java_thread_group->obj_field(_name_offset); 1808 // ThreadGroup.name can be null 1809 if (name != NULL) { 1810 return java_lang_String::as_utf8_string(name); 1811 } 1812 return NULL; 1813 } 1814 1815 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1816 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1817 return java_thread_group->int_field(_nthreads_offset); 1818 } 1819 1820 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1821 oop threads = java_thread_group->obj_field(_threads_offset); 1822 assert(threads != NULL, "threadgroups should have threads"); 1823 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1824 return objArrayOop(threads); 1825 } 1826 1827 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1828 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1829 return java_thread_group->int_field(_ngroups_offset); 1830 } 1831 1832 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1833 oop groups = java_thread_group->obj_field(_groups_offset); 1834 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1835 return objArrayOop(groups); 1836 } 1837 1838 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1839 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1840 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1841 } 1842 1843 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1844 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1845 return java_thread_group->bool_field(_destroyed_offset) != 0; 1846 } 1847 1848 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1849 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1850 return java_thread_group->bool_field(_daemon_offset) != 0; 1851 } 1852 1853 #define THREADGROUP_FIELDS_DO(macro) \ 1854 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \ 1855 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1856 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \ 1857 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \ 1858 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \ 1859 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \ 1860 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1861 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \ 1862 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false) 1863 1864 void java_lang_ThreadGroup::compute_offsets() { 1865 assert(_parent_offset == 0, "offsets should be initialized only once"); 1866 1867 InstanceKlass* k = SystemDictionary::ThreadGroup_klass(); 1868 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1869 } 1870 1871 #if INCLUDE_CDS 1872 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) { 1873 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1874 } 1875 #endif 1876 1877 #define THROWABLE_FIELDS_DO(macro) \ 1878 macro(backtrace_offset, k, "backtrace", object_signature, false); \ 1879 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \ 1880 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 1881 macro(depth_offset, k, "depth", int_signature, false); \ 1882 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 1883 1884 void java_lang_Throwable::compute_offsets() { 1885 InstanceKlass* k = SystemDictionary::Throwable_klass(); 1886 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1887 } 1888 1889 #if INCLUDE_CDS 1890 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) { 1891 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1892 } 1893 #endif 1894 1895 oop java_lang_Throwable::unassigned_stacktrace() { 1896 InstanceKlass* ik = SystemDictionary::Throwable_klass(); 1897 oop base = ik->static_field_base_raw(); 1898 return base->obj_field(static_unassigned_stacktrace_offset); 1899 } 1900 1901 oop java_lang_Throwable::backtrace(oop throwable) { 1902 return throwable->obj_field_acquire(backtrace_offset); 1903 } 1904 1905 1906 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1907 throwable->release_obj_field_put(backtrace_offset, value); 1908 } 1909 1910 int java_lang_Throwable::depth(oop throwable) { 1911 return throwable->int_field(depth_offset); 1912 } 1913 1914 void java_lang_Throwable::set_depth(oop throwable, int value) { 1915 throwable->int_field_put(depth_offset, value); 1916 } 1917 1918 oop java_lang_Throwable::message(oop throwable) { 1919 return throwable->obj_field(detailMessage_offset); 1920 } 1921 1922 1923 // Return Symbol for detailed_message or NULL 1924 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1925 PRESERVE_EXCEPTION_MARK; // Keep original exception 1926 oop detailed_message = java_lang_Throwable::message(throwable); 1927 if (detailed_message != NULL) { 1928 return java_lang_String::as_symbol(detailed_message, THREAD); 1929 } 1930 return NULL; 1931 } 1932 1933 void java_lang_Throwable::set_message(oop throwable, oop value) { 1934 throwable->obj_field_put(detailMessage_offset, value); 1935 } 1936 1937 1938 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1939 throwable->obj_field_put(stackTrace_offset, st_element_array); 1940 } 1941 1942 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1943 set_stacktrace(throwable, NULL); 1944 } 1945 1946 1947 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1948 ResourceMark rm; 1949 Klass* k = throwable->klass(); 1950 assert(k != NULL, "just checking"); 1951 st->print("%s", k->external_name()); 1952 oop msg = message(throwable); 1953 if (msg != NULL) { 1954 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1955 } 1956 } 1957 1958 // After this many redefines, the stack trace is unreliable. 1959 const int MAX_VERSION = USHRT_MAX; 1960 1961 static inline bool version_matches(Method* method, int version) { 1962 assert(version < MAX_VERSION, "version is too big"); 1963 return method != NULL && (method->constants()->version() == version); 1964 } 1965 1966 1967 // This class provides a simple wrapper over the internal structure of 1968 // exception backtrace to insulate users of the backtrace from needing 1969 // to know what it looks like. 1970 class BacktraceBuilder: public StackObj { 1971 friend class BacktraceIterator; 1972 private: 1973 Handle _backtrace; 1974 objArrayOop _head; 1975 typeArrayOop _methods; 1976 typeArrayOop _bcis; 1977 objArrayOop _mirrors; 1978 typeArrayOop _names; // needed to insulate method name against redefinition 1979 int _index; 1980 NoSafepointVerifier _nsv; 1981 1982 enum { 1983 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1984 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1985 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1986 trace_names_offset = java_lang_Throwable::trace_names_offset, 1987 trace_next_offset = java_lang_Throwable::trace_next_offset, 1988 trace_size = java_lang_Throwable::trace_size, 1989 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1990 }; 1991 1992 // get info out of chunks 1993 static typeArrayOop get_methods(objArrayHandle chunk) { 1994 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1995 assert(methods != NULL, "method array should be initialized in backtrace"); 1996 return methods; 1997 } 1998 static typeArrayOop get_bcis(objArrayHandle chunk) { 1999 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 2000 assert(bcis != NULL, "bci array should be initialized in backtrace"); 2001 return bcis; 2002 } 2003 static objArrayOop get_mirrors(objArrayHandle chunk) { 2004 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 2005 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 2006 return mirrors; 2007 } 2008 static typeArrayOop get_names(objArrayHandle chunk) { 2009 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 2010 assert(names != NULL, "names array should be initialized in backtrace"); 2011 return names; 2012 } 2013 2014 public: 2015 2016 // constructor for new backtrace 2017 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL) { 2018 expand(CHECK); 2019 _backtrace = Handle(THREAD, _head); 2020 _index = 0; 2021 } 2022 2023 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 2024 _methods = get_methods(backtrace); 2025 _bcis = get_bcis(backtrace); 2026 _mirrors = get_mirrors(backtrace); 2027 _names = get_names(backtrace); 2028 assert(_methods->length() == _bcis->length() && 2029 _methods->length() == _mirrors->length() && 2030 _mirrors->length() == _names->length(), 2031 "method and source information arrays should match"); 2032 2033 // head is the preallocated backtrace 2034 _head = backtrace(); 2035 _backtrace = Handle(thread, _head); 2036 _index = 0; 2037 } 2038 2039 void expand(TRAPS) { 2040 objArrayHandle old_head(THREAD, _head); 2041 PauseNoSafepointVerifier pnsv(&_nsv); 2042 2043 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2044 objArrayHandle new_head(THREAD, head); 2045 2046 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2047 typeArrayHandle new_methods(THREAD, methods); 2048 2049 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2050 typeArrayHandle new_bcis(THREAD, bcis); 2051 2052 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2053 objArrayHandle new_mirrors(THREAD, mirrors); 2054 2055 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2056 typeArrayHandle new_names(THREAD, names); 2057 2058 if (!old_head.is_null()) { 2059 old_head->obj_at_put(trace_next_offset, new_head()); 2060 } 2061 new_head->obj_at_put(trace_methods_offset, new_methods()); 2062 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2063 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2064 new_head->obj_at_put(trace_names_offset, new_names()); 2065 2066 _head = new_head(); 2067 _methods = new_methods(); 2068 _bcis = new_bcis(); 2069 _mirrors = new_mirrors(); 2070 _names = new_names(); 2071 _index = 0; 2072 } 2073 2074 oop backtrace() { 2075 return _backtrace(); 2076 } 2077 2078 inline void push(Method* method, int bci, TRAPS) { 2079 // Smear the -1 bci to 0 since the array only holds unsigned 2080 // shorts. The later line number lookup would just smear the -1 2081 // to a 0 even if it could be recorded. 2082 if (bci == SynchronizationEntryBCI) bci = 0; 2083 2084 if (_index >= trace_chunk_size) { 2085 methodHandle mhandle(THREAD, method); 2086 expand(CHECK); 2087 method = mhandle(); 2088 } 2089 2090 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2091 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2092 2093 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2094 // klass owning the symbols alive so their refcounts aren't decremented. 2095 Symbol* name = method->name(); 2096 _names->symbol_at_put(_index, name); 2097 2098 // We need to save the mirrors in the backtrace to keep the class 2099 // from being unloaded while we still have this stack trace. 2100 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 2101 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2102 _index++; 2103 } 2104 2105 }; 2106 2107 struct BacktraceElement : public StackObj { 2108 int _method_id; 2109 int _bci; 2110 int _version; 2111 Symbol* _name; 2112 Handle _mirror; 2113 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2114 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {} 2115 }; 2116 2117 class BacktraceIterator : public StackObj { 2118 int _index; 2119 objArrayHandle _result; 2120 objArrayHandle _mirrors; 2121 typeArrayHandle _methods; 2122 typeArrayHandle _bcis; 2123 typeArrayHandle _names; 2124 2125 void init(objArrayHandle result, Thread* thread) { 2126 // Get method id, bci, version and mirror from chunk 2127 _result = result; 2128 if (_result.not_null()) { 2129 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2130 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2131 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2132 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2133 _index = 0; 2134 } 2135 } 2136 public: 2137 BacktraceIterator(objArrayHandle result, Thread* thread) { 2138 init(result, thread); 2139 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2140 } 2141 2142 BacktraceElement next(Thread* thread) { 2143 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2144 _methods->ushort_at(_index), 2145 Backtrace::version_at(_bcis->int_at(_index)), 2146 Backtrace::bci_at(_bcis->int_at(_index)), 2147 _names->symbol_at(_index)); 2148 _index++; 2149 2150 if (_index >= java_lang_Throwable::trace_chunk_size) { 2151 int next_offset = java_lang_Throwable::trace_next_offset; 2152 // Get next chunk 2153 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2154 init(result, thread); 2155 } 2156 return e; 2157 } 2158 2159 bool repeat() { 2160 return _result.not_null() && _mirrors->obj_at(_index) != NULL; 2161 } 2162 }; 2163 2164 2165 // Print stack trace element to resource allocated buffer 2166 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 2167 int version, int bci, Symbol* name) { 2168 ResourceMark rm; 2169 2170 // Get strings and string lengths 2171 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2172 const char* klass_name = holder->external_name(); 2173 int buf_len = (int)strlen(klass_name); 2174 2175 char* method_name = name->as_C_string(); 2176 buf_len += (int)strlen(method_name); 2177 2178 char* source_file_name = NULL; 2179 Symbol* source = Backtrace::get_source_file_name(holder, version); 2180 if (source != NULL) { 2181 source_file_name = source->as_C_string(); 2182 buf_len += (int)strlen(source_file_name); 2183 } 2184 2185 char *module_name = NULL, *module_version = NULL; 2186 ModuleEntry* module = holder->module(); 2187 if (module->is_named()) { 2188 module_name = module->name()->as_C_string(); 2189 buf_len += (int)strlen(module_name); 2190 if (module->version() != NULL) { 2191 module_version = module->version()->as_C_string(); 2192 buf_len += (int)strlen(module_version); 2193 } 2194 } 2195 2196 // Allocate temporary buffer with extra space for formatting and line number 2197 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 2198 2199 // Print stack trace line in buffer 2200 sprintf(buf, "\tat %s.%s(", klass_name, method_name); 2201 2202 // Print module information 2203 if (module_name != NULL) { 2204 if (module_version != NULL) { 2205 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version); 2206 } else { 2207 sprintf(buf + (int)strlen(buf), "%s/", module_name); 2208 } 2209 } 2210 2211 // The method can be NULL if the requested class version is gone 2212 Method* method = holder->method_with_orig_idnum(method_id, version); 2213 if (!version_matches(method, version)) { 2214 strcat(buf, "Redefined)"); 2215 } else { 2216 int line_number = Backtrace::get_line_number(method, bci); 2217 if (line_number == -2) { 2218 strcat(buf, "Native Method)"); 2219 } else { 2220 if (source_file_name != NULL && (line_number != -1)) { 2221 // Sourcename and linenumber 2222 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number); 2223 } else if (source_file_name != NULL) { 2224 // Just sourcename 2225 sprintf(buf + (int)strlen(buf), "%s)", source_file_name); 2226 } else { 2227 // Neither sourcename nor linenumber 2228 sprintf(buf + (int)strlen(buf), "Unknown Source)"); 2229 } 2230 CompiledMethod* nm = method->code(); 2231 if (WizardMode && nm != NULL) { 2232 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 2233 } 2234 } 2235 } 2236 2237 st->print_cr("%s", buf); 2238 } 2239 2240 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) { 2241 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 2242 int method_id = method->orig_method_idnum(); 2243 int version = method->constants()->version(); 2244 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 2245 } 2246 2247 /** 2248 * Print the throwable message and its stack trace plus all causes by walking the 2249 * cause chain. The output looks the same as of Throwable.printStackTrace(). 2250 */ 2251 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 2252 // First, print the message. 2253 print(throwable(), st); 2254 st->cr(); 2255 2256 // Now print the stack trace. 2257 Thread* THREAD = Thread::current(); 2258 while (throwable.not_null()) { 2259 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 2260 if (result.is_null()) { 2261 st->print_raw_cr("\t<<no stack trace available>>"); 2262 return; 2263 } 2264 BacktraceIterator iter(result, THREAD); 2265 2266 while (iter.repeat()) { 2267 BacktraceElement bte = iter.next(THREAD); 2268 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 2269 } 2270 { 2271 // Call getCause() which doesn't necessarily return the _cause field. 2272 EXCEPTION_MARK; 2273 JavaValue cause(T_OBJECT); 2274 JavaCalls::call_virtual(&cause, 2275 throwable, 2276 throwable->klass(), 2277 vmSymbols::getCause_name(), 2278 vmSymbols::void_throwable_signature(), 2279 THREAD); 2280 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 2281 if (HAS_PENDING_EXCEPTION) { 2282 CLEAR_PENDING_EXCEPTION; 2283 throwable = Handle(); 2284 } else { 2285 throwable = Handle(THREAD, (oop) cause.get_jobject()); 2286 if (throwable.not_null()) { 2287 st->print("Caused by: "); 2288 print(throwable(), st); 2289 st->cr(); 2290 } 2291 } 2292 } 2293 } 2294 } 2295 2296 /** 2297 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 2298 */ 2299 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 2300 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected"); 2301 JavaValue result(T_VOID); 2302 JavaCalls::call_virtual(&result, 2303 throwable, 2304 SystemDictionary::Throwable_klass(), 2305 vmSymbols::printStackTrace_name(), 2306 vmSymbols::void_method_signature(), 2307 THREAD); 2308 } 2309 2310 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 2311 if (!StackTraceInThrowable) return; 2312 ResourceMark rm(THREAD); 2313 2314 // Start out by clearing the backtrace for this object, in case the VM 2315 // runs out of memory while allocating the stack trace 2316 set_backtrace(throwable(), NULL); 2317 // Clear lazily constructed Java level stacktrace if refilling occurs 2318 // This is unnecessary in 1.7+ but harmless 2319 clear_stacktrace(throwable()); 2320 2321 int max_depth = MaxJavaStackTraceDepth; 2322 JavaThread* thread = (JavaThread*)THREAD; 2323 2324 BacktraceBuilder bt(CHECK); 2325 2326 // If there is no Java frame just return the method that was being called 2327 // with bci 0 2328 if (!thread->has_last_Java_frame()) { 2329 if (max_depth >= 1 && method() != NULL) { 2330 bt.push(method(), 0, CHECK); 2331 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 2332 set_depth(throwable(), 1); 2333 set_backtrace(throwable(), bt.backtrace()); 2334 } 2335 return; 2336 } 2337 2338 // Instead of using vframe directly, this version of fill_in_stack_trace 2339 // basically handles everything by hand. This significantly improved the 2340 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 2341 // See bug 6333838 for more details. 2342 // The "ASSERT" here is to verify this method generates the exactly same stack 2343 // trace as utilizing vframe. 2344 #ifdef ASSERT 2345 vframeStream st(thread); 2346 methodHandle st_method(THREAD, st.method()); 2347 #endif 2348 int total_count = 0; 2349 RegisterMap map(thread, false); 2350 int decode_offset = 0; 2351 CompiledMethod* nm = NULL; 2352 bool skip_fillInStackTrace_check = false; 2353 bool skip_throwableInit_check = false; 2354 bool skip_hidden = !ShowHiddenFrames; 2355 2356 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 2357 Method* method = NULL; 2358 int bci = 0; 2359 2360 // Compiled java method case. 2361 if (decode_offset != 0) { 2362 DebugInfoReadStream stream(nm, decode_offset); 2363 decode_offset = stream.read_int(); 2364 method = (Method*)nm->metadata_at(stream.read_int()); 2365 bci = stream.read_bci(); 2366 } else { 2367 if (fr.is_first_frame()) break; 2368 address pc = fr.pc(); 2369 if (fr.is_interpreted_frame()) { 2370 address bcp = fr.interpreter_frame_bcp(); 2371 method = fr.interpreter_frame_method(); 2372 bci = method->bci_from(bcp); 2373 fr = fr.sender(&map); 2374 } else { 2375 CodeBlob* cb = fr.cb(); 2376 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 2377 // but non nmethod 2378 fr = fr.sender(&map); 2379 if (cb == NULL || !cb->is_compiled()) { 2380 continue; 2381 } 2382 nm = cb->as_compiled_method(); 2383 if (nm->method()->is_native()) { 2384 method = nm->method(); 2385 bci = 0; 2386 } else { 2387 PcDesc* pd = nm->pc_desc_at(pc); 2388 decode_offset = pd->scope_decode_offset(); 2389 // if decode_offset is not equal to 0, it will execute the 2390 // "compiled java method case" at the beginning of the loop. 2391 continue; 2392 } 2393 } 2394 } 2395 #ifdef ASSERT 2396 assert(st_method() == method && st.bci() == bci, 2397 "Wrong stack trace"); 2398 st.next(); 2399 // vframeStream::method isn't GC-safe so store off a copy 2400 // of the Method* in case we GC. 2401 if (!st.at_end()) { 2402 st_method = st.method(); 2403 } 2404 #endif 2405 2406 // the format of the stacktrace will be: 2407 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2408 // - 0 or more <init> methods for the exception class (skipped) 2409 // - rest of the stack 2410 2411 if (!skip_fillInStackTrace_check) { 2412 if (method->name() == vmSymbols::fillInStackTrace_name() && 2413 throwable->is_a(method->method_holder())) { 2414 continue; 2415 } 2416 else { 2417 skip_fillInStackTrace_check = true; // gone past them all 2418 } 2419 } 2420 if (!skip_throwableInit_check) { 2421 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2422 2423 // skip <init> methods of the exception class and superclasses 2424 // This is simlar to classic VM. 2425 if (method->name() == vmSymbols::object_initializer_name() && 2426 throwable->is_a(method->method_holder())) { 2427 continue; 2428 } else { 2429 // there are none or we've seen them all - either way stop checking 2430 skip_throwableInit_check = true; 2431 } 2432 } 2433 if (method->is_hidden()) { 2434 if (skip_hidden) continue; 2435 } 2436 bt.push(method, bci, CHECK); 2437 total_count++; 2438 } 2439 2440 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2441 2442 // Put completed stack trace into throwable object 2443 set_backtrace(throwable(), bt.backtrace()); 2444 set_depth(throwable(), total_count); 2445 } 2446 2447 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2448 // No-op if stack trace is disabled 2449 if (!StackTraceInThrowable) { 2450 return; 2451 } 2452 2453 // Disable stack traces for some preallocated out of memory errors 2454 if (!Universe::should_fill_in_stack_trace(throwable)) { 2455 return; 2456 } 2457 2458 PRESERVE_EXCEPTION_MARK; 2459 2460 JavaThread* thread = JavaThread::active(); 2461 fill_in_stack_trace(throwable, method, thread); 2462 // ignore exceptions thrown during stack trace filling 2463 CLEAR_PENDING_EXCEPTION; 2464 } 2465 2466 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2467 // Allocate stack trace - backtrace is created but not filled in 2468 2469 // No-op if stack trace is disabled 2470 if (!StackTraceInThrowable) return; 2471 BacktraceBuilder bt(CHECK); // creates a backtrace 2472 set_backtrace(throwable(), bt.backtrace()); 2473 } 2474 2475 2476 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2477 // Fill in stack trace into preallocated backtrace (no GC) 2478 2479 // No-op if stack trace is disabled 2480 if (!StackTraceInThrowable) return; 2481 2482 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 2483 2484 JavaThread* THREAD = JavaThread::current(); 2485 2486 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2487 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2488 2489 ResourceMark rm(THREAD); 2490 vframeStream st(THREAD); 2491 2492 BacktraceBuilder bt(THREAD, backtrace); 2493 2494 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2495 // methods as preallocated errors aren't created by "java" code. 2496 2497 // fill in as much stack trace as possible 2498 int chunk_count = 0; 2499 for (;!st.at_end(); st.next()) { 2500 bt.push(st.method(), st.bci(), CHECK); 2501 chunk_count++; 2502 2503 // Bail-out for deep stacks 2504 if (chunk_count >= trace_chunk_size) break; 2505 } 2506 set_depth(throwable(), chunk_count); 2507 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2508 2509 // We support the Throwable immutability protocol defined for Java 7. 2510 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2511 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 2512 } 2513 2514 void java_lang_Throwable::get_stack_trace_elements(Handle throwable, 2515 objArrayHandle stack_trace_array_h, TRAPS) { 2516 2517 if (throwable.is_null() || stack_trace_array_h.is_null()) { 2518 THROW(vmSymbols::java_lang_NullPointerException()); 2519 } 2520 2521 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2522 2523 if (stack_trace_array_h->length() != depth(throwable())) { 2524 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2525 } 2526 2527 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable()))); 2528 BacktraceIterator iter(result, THREAD); 2529 2530 int index = 0; 2531 while (iter.repeat()) { 2532 BacktraceElement bte = iter.next(THREAD); 2533 2534 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2535 2536 if (stack_trace_element.is_null()) { 2537 THROW(vmSymbols::java_lang_NullPointerException()); 2538 } 2539 2540 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2541 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2542 2543 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2544 method, 2545 bte._version, 2546 bte._bci, 2547 bte._name, CHECK); 2548 } 2549 } 2550 2551 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2552 // Allocate java.lang.StackTraceElement instance 2553 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 2554 assert(k != NULL, "must be loaded in 1.4+"); 2555 if (k->should_be_initialized()) { 2556 k->initialize(CHECK_0); 2557 } 2558 2559 Handle element = k->allocate_instance_handle(CHECK_0); 2560 2561 int version = method->constants()->version(); 2562 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0); 2563 return element(); 2564 } 2565 2566 void java_lang_StackTraceElement::fill_in(Handle element, 2567 InstanceKlass* holder, const methodHandle& method, 2568 int version, int bci, Symbol* name, TRAPS) { 2569 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check"); 2570 2571 // Fill in class name 2572 ResourceMark rm(THREAD); 2573 const char* str = holder->external_name(); 2574 oop classname = StringTable::intern(str, CHECK); 2575 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2576 java_lang_StackTraceElement::set_declaringClassObject(element(), holder->java_mirror()); 2577 2578 oop loader = holder->class_loader(); 2579 if (loader != NULL) { 2580 oop loader_name = java_lang_ClassLoader::name(loader); 2581 if (loader_name != NULL) 2582 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2583 } 2584 2585 // Fill in method name 2586 oop methodname = StringTable::intern(name, CHECK); 2587 java_lang_StackTraceElement::set_methodName(element(), methodname); 2588 2589 // Fill in module name and version 2590 ModuleEntry* module = holder->module(); 2591 if (module->is_named()) { 2592 oop module_name = StringTable::intern(module->name(), CHECK); 2593 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2594 oop module_version; 2595 if (module->version() != NULL) { 2596 module_version = StringTable::intern(module->version(), CHECK); 2597 } else { 2598 module_version = NULL; 2599 } 2600 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2601 } 2602 2603 if (method() == NULL || !version_matches(method(), version)) { 2604 // The method was redefined, accurate line number information isn't available 2605 java_lang_StackTraceElement::set_fileName(element(), NULL); 2606 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2607 } else { 2608 // Fill in source file name and line number. 2609 Symbol* source = Backtrace::get_source_file_name(holder, version); 2610 if (ShowHiddenFrames && source == NULL) 2611 source = vmSymbols::unknown_class_name(); 2612 oop filename = StringTable::intern(source, CHECK); 2613 java_lang_StackTraceElement::set_fileName(element(), filename); 2614 2615 int line_number = Backtrace::get_line_number(method, bci); 2616 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2617 } 2618 } 2619 2620 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 2621 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 2622 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 2623 // we should expand MemberName::name when Throwable uses StackTrace 2624 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 2625 return method; 2626 } 2627 2628 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) { 2629 // set Method* or mid/cpref 2630 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset)); 2631 InstanceKlass* ik = method->method_holder(); 2632 CallInfo info(method(), ik, CHECK); 2633 MethodHandles::init_method_MemberName(mname, info); 2634 // set bci 2635 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 2636 // method may be redefined; store the version 2637 int version = method->constants()->version(); 2638 assert((jushort)version == version, "version should be short"); 2639 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 2640 } 2641 2642 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 2643 ResourceMark rm(THREAD); 2644 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset)); 2645 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname())); 2646 InstanceKlass* holder = InstanceKlass::cast(clazz); 2647 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 2648 2649 short version = stackFrame->short_field(_version_offset); 2650 short bci = stackFrame->short_field(_bci_offset); 2651 Symbol* name = method->name(); 2652 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK); 2653 } 2654 2655 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 2656 macro(_memberName_offset, k, "memberName", object_signature, false); \ 2657 macro(_bci_offset, k, "bci", short_signature, false) 2658 2659 void java_lang_StackFrameInfo::compute_offsets() { 2660 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass(); 2661 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2662 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2663 } 2664 2665 #if INCLUDE_CDS 2666 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) { 2667 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2668 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 2669 } 2670 #endif 2671 2672 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 2673 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 2674 macro(_locals_offset, k, "locals", object_array_signature, false); \ 2675 macro(_operands_offset, k, "operands", object_array_signature, false); \ 2676 macro(_mode_offset, k, "mode", int_signature, false) 2677 2678 void java_lang_LiveStackFrameInfo::compute_offsets() { 2679 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass(); 2680 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2681 } 2682 2683 #if INCLUDE_CDS 2684 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) { 2685 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2686 } 2687 #endif 2688 2689 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 2690 macro(override_offset, k, "override", bool_signature, false) 2691 2692 void java_lang_reflect_AccessibleObject::compute_offsets() { 2693 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass(); 2694 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2695 } 2696 2697 #if INCLUDE_CDS 2698 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) { 2699 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2700 } 2701 #endif 2702 2703 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 2704 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2705 return (jboolean) reflect->bool_field(override_offset); 2706 } 2707 2708 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 2709 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2710 reflect->bool_field_put(override_offset, (int) value); 2711 } 2712 2713 #define METHOD_FIELDS_DO(macro) \ 2714 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2715 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2716 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 2717 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2718 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2719 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2720 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2721 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 2722 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 2723 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \ 2724 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false); 2725 2726 void java_lang_reflect_Method::compute_offsets() { 2727 InstanceKlass* k = SystemDictionary::reflect_Method_klass(); 2728 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2729 } 2730 2731 #if INCLUDE_CDS 2732 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) { 2733 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2734 } 2735 #endif 2736 2737 Handle java_lang_reflect_Method::create(TRAPS) { 2738 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2739 Klass* klass = SystemDictionary::reflect_Method_klass(); 2740 // This class is eagerly initialized during VM initialization, since we keep a refence 2741 // to one of the methods 2742 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2743 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2744 } 2745 2746 oop java_lang_reflect_Method::clazz(oop reflect) { 2747 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2748 return reflect->obj_field(clazz_offset); 2749 } 2750 2751 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2752 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2753 reflect->obj_field_put(clazz_offset, value); 2754 } 2755 2756 int java_lang_reflect_Method::slot(oop reflect) { 2757 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2758 return reflect->int_field(slot_offset); 2759 } 2760 2761 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2762 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2763 reflect->int_field_put(slot_offset, value); 2764 } 2765 2766 void java_lang_reflect_Method::set_name(oop method, oop value) { 2767 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2768 method->obj_field_put(name_offset, value); 2769 } 2770 2771 oop java_lang_reflect_Method::return_type(oop method) { 2772 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2773 return method->obj_field(returnType_offset); 2774 } 2775 2776 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2777 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2778 method->obj_field_put(returnType_offset, value); 2779 } 2780 2781 oop java_lang_reflect_Method::parameter_types(oop method) { 2782 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2783 return method->obj_field(parameterTypes_offset); 2784 } 2785 2786 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2787 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2788 method->obj_field_put(parameterTypes_offset, value); 2789 } 2790 2791 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2792 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2793 method->obj_field_put(exceptionTypes_offset, value); 2794 } 2795 2796 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2797 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2798 method->int_field_put(modifiers_offset, value); 2799 } 2800 2801 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2802 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2803 method->obj_field_put(signature_offset, value); 2804 } 2805 2806 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2807 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2808 method->obj_field_put(annotations_offset, value); 2809 } 2810 2811 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2812 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2813 method->obj_field_put(parameter_annotations_offset, value); 2814 } 2815 2816 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2817 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2818 method->obj_field_put(annotation_default_offset, value); 2819 } 2820 2821 #define CONSTRUCTOR_FIELDS_DO(macro) \ 2822 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2823 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2824 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2825 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2826 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2827 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 2828 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 2829 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); 2830 2831 void java_lang_reflect_Constructor::compute_offsets() { 2832 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass(); 2833 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2834 } 2835 2836 #if INCLUDE_CDS 2837 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) { 2838 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2839 } 2840 #endif 2841 2842 Handle java_lang_reflect_Constructor::create(TRAPS) { 2843 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2844 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2845 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2846 InstanceKlass* ik = InstanceKlass::cast(k); 2847 // Ensure it is initialized 2848 ik->initialize(CHECK_NH); 2849 return ik->allocate_instance_handle(THREAD); 2850 } 2851 2852 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2853 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2854 return reflect->obj_field(clazz_offset); 2855 } 2856 2857 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2858 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2859 reflect->obj_field_put(clazz_offset, value); 2860 } 2861 2862 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2863 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2864 return constructor->obj_field(parameterTypes_offset); 2865 } 2866 2867 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2868 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2869 constructor->obj_field_put(parameterTypes_offset, value); 2870 } 2871 2872 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2873 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2874 constructor->obj_field_put(exceptionTypes_offset, value); 2875 } 2876 2877 int java_lang_reflect_Constructor::slot(oop reflect) { 2878 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2879 return reflect->int_field(slot_offset); 2880 } 2881 2882 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2883 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2884 reflect->int_field_put(slot_offset, value); 2885 } 2886 2887 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2888 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2889 constructor->int_field_put(modifiers_offset, value); 2890 } 2891 2892 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2893 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2894 constructor->obj_field_put(signature_offset, value); 2895 } 2896 2897 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2898 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2899 constructor->obj_field_put(annotations_offset, value); 2900 } 2901 2902 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2903 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2904 method->obj_field_put(parameter_annotations_offset, value); 2905 } 2906 2907 #define FIELD_FIELDS_DO(macro) \ 2908 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2909 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2910 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \ 2911 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2912 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2913 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 2914 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); 2915 2916 void java_lang_reflect_Field::compute_offsets() { 2917 InstanceKlass* k = SystemDictionary::reflect_Field_klass(); 2918 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2919 } 2920 2921 #if INCLUDE_CDS 2922 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) { 2923 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2924 } 2925 #endif 2926 2927 Handle java_lang_reflect_Field::create(TRAPS) { 2928 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2929 Symbol* name = vmSymbols::java_lang_reflect_Field(); 2930 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2931 InstanceKlass* ik = InstanceKlass::cast(k); 2932 // Ensure it is initialized 2933 ik->initialize(CHECK_NH); 2934 return ik->allocate_instance_handle(THREAD); 2935 } 2936 2937 oop java_lang_reflect_Field::clazz(oop reflect) { 2938 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2939 return reflect->obj_field(clazz_offset); 2940 } 2941 2942 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2943 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2944 reflect->obj_field_put(clazz_offset, value); 2945 } 2946 2947 oop java_lang_reflect_Field::name(oop field) { 2948 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2949 return field->obj_field(name_offset); 2950 } 2951 2952 void java_lang_reflect_Field::set_name(oop field, oop value) { 2953 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2954 field->obj_field_put(name_offset, value); 2955 } 2956 2957 oop java_lang_reflect_Field::type(oop field) { 2958 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2959 return field->obj_field(type_offset); 2960 } 2961 2962 void java_lang_reflect_Field::set_type(oop field, oop value) { 2963 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2964 field->obj_field_put(type_offset, value); 2965 } 2966 2967 int java_lang_reflect_Field::slot(oop reflect) { 2968 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2969 return reflect->int_field(slot_offset); 2970 } 2971 2972 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 2973 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2974 reflect->int_field_put(slot_offset, value); 2975 } 2976 2977 int java_lang_reflect_Field::modifiers(oop field) { 2978 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2979 return field->int_field(modifiers_offset); 2980 } 2981 2982 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 2983 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2984 field->int_field_put(modifiers_offset, value); 2985 } 2986 2987 void java_lang_reflect_Field::set_signature(oop field, oop value) { 2988 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2989 field->obj_field_put(signature_offset, value); 2990 } 2991 2992 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 2993 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2994 field->obj_field_put(annotations_offset, value); 2995 } 2996 2997 #define CONSTANTPOOL_FIELDS_DO(macro) \ 2998 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 2999 3000 void reflect_ConstantPool::compute_offsets() { 3001 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3002 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3003 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3004 } 3005 3006 #if INCLUDE_CDS 3007 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) { 3008 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3009 } 3010 #endif 3011 3012 #define PARAMETER_FIELDS_DO(macro) \ 3013 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3014 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3015 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3016 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3017 3018 void java_lang_reflect_Parameter::compute_offsets() { 3019 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass(); 3020 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3021 } 3022 3023 #if INCLUDE_CDS 3024 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) { 3025 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3026 } 3027 #endif 3028 3029 Handle java_lang_reflect_Parameter::create(TRAPS) { 3030 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3031 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3032 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3033 InstanceKlass* ik = InstanceKlass::cast(k); 3034 // Ensure it is initialized 3035 ik->initialize(CHECK_NH); 3036 return ik->allocate_instance_handle(THREAD); 3037 } 3038 3039 oop java_lang_reflect_Parameter::name(oop param) { 3040 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3041 return param->obj_field(name_offset); 3042 } 3043 3044 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3045 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3046 param->obj_field_put(name_offset, value); 3047 } 3048 3049 int java_lang_reflect_Parameter::modifiers(oop param) { 3050 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3051 return param->int_field(modifiers_offset); 3052 } 3053 3054 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3055 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3056 param->int_field_put(modifiers_offset, value); 3057 } 3058 3059 int java_lang_reflect_Parameter::index(oop param) { 3060 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3061 return param->int_field(index_offset); 3062 } 3063 3064 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3065 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3066 param->int_field_put(index_offset, value); 3067 } 3068 3069 oop java_lang_reflect_Parameter::executable(oop param) { 3070 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3071 return param->obj_field(executable_offset); 3072 } 3073 3074 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3075 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3076 param->obj_field_put(executable_offset, value); 3077 } 3078 3079 3080 int java_lang_Module::loader_offset; 3081 int java_lang_Module::name_offset; 3082 int java_lang_Module::_module_entry_offset = -1; 3083 3084 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3085 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3086 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(), 3087 vmSymbols::java_lang_module_init_signature(), 3088 loader, module_name, CHECK_NH); 3089 } 3090 3091 #define MODULE_FIELDS_DO(macro) \ 3092 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3093 macro(name_offset, k, vmSymbols::name_name(), string_signature, false) 3094 3095 void java_lang_Module::compute_offsets() { 3096 InstanceKlass* k = SystemDictionary::Module_klass(); 3097 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3098 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3099 } 3100 3101 #if INCLUDE_CDS 3102 void java_lang_Module::serialize_offsets(SerializeClosure* f) { 3103 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3104 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3105 } 3106 #endif 3107 3108 oop java_lang_Module::loader(oop module) { 3109 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3110 return module->obj_field(loader_offset); 3111 } 3112 3113 void java_lang_Module::set_loader(oop module, oop value) { 3114 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3115 module->obj_field_put(loader_offset, value); 3116 } 3117 3118 oop java_lang_Module::name(oop module) { 3119 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3120 return module->obj_field(name_offset); 3121 } 3122 3123 void java_lang_Module::set_name(oop module, oop value) { 3124 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3125 module->obj_field_put(name_offset, value); 3126 } 3127 3128 ModuleEntry* java_lang_Module::module_entry(oop module) { 3129 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3130 assert(module != NULL, "module can't be null"); 3131 assert(oopDesc::is_oop(module), "module must be oop"); 3132 3133 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3134 if (module_entry == NULL) { 3135 // If the inject field containing the ModuleEntry* is null then return the 3136 // class loader's unnamed module. 3137 oop loader = java_lang_Module::loader(module); 3138 Handle h_loader = Handle(Thread::current(), loader); 3139 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3140 return loader_cld->unnamed_module(); 3141 } 3142 return module_entry; 3143 } 3144 3145 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3146 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3147 assert(module != NULL, "module can't be null"); 3148 assert(oopDesc::is_oop(module), "module must be oop"); 3149 module->address_field_put(_module_entry_offset, (address)module_entry); 3150 } 3151 3152 Handle reflect_ConstantPool::create(TRAPS) { 3153 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3154 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3155 // Ensure it is initialized 3156 k->initialize(CHECK_NH); 3157 return k->allocate_instance_handle(THREAD); 3158 } 3159 3160 3161 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3162 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3163 oop mirror = value->pool_holder()->java_mirror(); 3164 // Save the mirror to get back the constant pool. 3165 reflect->obj_field_put(_oop_offset, mirror); 3166 } 3167 3168 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3169 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3170 3171 oop mirror = reflect->obj_field(_oop_offset); 3172 Klass* k = java_lang_Class::as_Klass(mirror); 3173 assert(k->is_instance_klass(), "Must be"); 3174 3175 // Get the constant pool back from the klass. Since class redefinition 3176 // merges the new constant pool into the old, this is essentially the 3177 // same constant pool as the original. If constant pool merging is 3178 // no longer done in the future, this will have to change to save 3179 // the original. 3180 return InstanceKlass::cast(k)->constants(); 3181 } 3182 3183 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \ 3184 macro(_base_offset, k, "base", object_signature, false) 3185 3186 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 3187 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 3188 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3189 } 3190 3191 #if INCLUDE_CDS 3192 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) { 3193 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3194 } 3195 #endif 3196 3197 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 3198 Klass* k = SystemDictionary::box_klass(type); 3199 if (k == NULL) return NULL; 3200 InstanceKlass* ik = InstanceKlass::cast(k); 3201 if (!ik->is_initialized()) ik->initialize(CHECK_0); 3202 return ik->allocate_instance(THREAD); 3203 } 3204 3205 3206 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 3207 oop box = initialize_and_allocate(type, CHECK_0); 3208 if (box == NULL) return NULL; 3209 switch (type) { 3210 case T_BOOLEAN: 3211 box->bool_field_put(value_offset, value->z); 3212 break; 3213 case T_CHAR: 3214 box->char_field_put(value_offset, value->c); 3215 break; 3216 case T_FLOAT: 3217 box->float_field_put(value_offset, value->f); 3218 break; 3219 case T_DOUBLE: 3220 box->double_field_put(long_value_offset, value->d); 3221 break; 3222 case T_BYTE: 3223 box->byte_field_put(value_offset, value->b); 3224 break; 3225 case T_SHORT: 3226 box->short_field_put(value_offset, value->s); 3227 break; 3228 case T_INT: 3229 box->int_field_put(value_offset, value->i); 3230 break; 3231 case T_LONG: 3232 box->long_field_put(long_value_offset, value->j); 3233 break; 3234 default: 3235 return NULL; 3236 } 3237 return box; 3238 } 3239 3240 3241 BasicType java_lang_boxing_object::basic_type(oop box) { 3242 if (box == NULL) return T_ILLEGAL; 3243 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3244 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 3245 return T_ILLEGAL; 3246 return type; 3247 } 3248 3249 3250 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 3251 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3252 switch (type) { 3253 case T_BOOLEAN: 3254 value->z = box->bool_field(value_offset); 3255 break; 3256 case T_CHAR: 3257 value->c = box->char_field(value_offset); 3258 break; 3259 case T_FLOAT: 3260 value->f = box->float_field(value_offset); 3261 break; 3262 case T_DOUBLE: 3263 value->d = box->double_field(long_value_offset); 3264 break; 3265 case T_BYTE: 3266 value->b = box->byte_field(value_offset); 3267 break; 3268 case T_SHORT: 3269 value->s = box->short_field(value_offset); 3270 break; 3271 case T_INT: 3272 value->i = box->int_field(value_offset); 3273 break; 3274 case T_LONG: 3275 value->j = box->long_field(long_value_offset); 3276 break; 3277 default: 3278 return T_ILLEGAL; 3279 } // end switch 3280 return type; 3281 } 3282 3283 3284 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3285 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3286 switch (type) { 3287 case T_BOOLEAN: 3288 box->bool_field_put(value_offset, value->z); 3289 break; 3290 case T_CHAR: 3291 box->char_field_put(value_offset, value->c); 3292 break; 3293 case T_FLOAT: 3294 box->float_field_put(value_offset, value->f); 3295 break; 3296 case T_DOUBLE: 3297 box->double_field_put(long_value_offset, value->d); 3298 break; 3299 case T_BYTE: 3300 box->byte_field_put(value_offset, value->b); 3301 break; 3302 case T_SHORT: 3303 box->short_field_put(value_offset, value->s); 3304 break; 3305 case T_INT: 3306 box->int_field_put(value_offset, value->i); 3307 break; 3308 case T_LONG: 3309 box->long_field_put(long_value_offset, value->j); 3310 break; 3311 default: 3312 return T_ILLEGAL; 3313 } // end switch 3314 return type; 3315 } 3316 3317 3318 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3319 switch (type) { 3320 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3321 case T_CHAR: st->print("%d", value->c); break; 3322 case T_BYTE: st->print("%d", value->b); break; 3323 case T_SHORT: st->print("%d", value->s); break; 3324 case T_INT: st->print("%d", value->i); break; 3325 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 3326 case T_FLOAT: st->print("%f", value->f); break; 3327 case T_DOUBLE: st->print("%lf", value->d); break; 3328 default: st->print("type %d?", type); break; 3329 } 3330 } 3331 3332 // Support for java_lang_ref_Reference 3333 3334 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3335 assert(obj != NULL, "sanity"); 3336 if (offset != java_lang_ref_Reference::referent_offset) { 3337 return false; 3338 } 3339 3340 Klass* k = obj->klass(); 3341 if (!k->is_instance_klass()) { 3342 return false; 3343 } 3344 3345 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3346 bool is_reference = ik->reference_type() != REF_NONE; 3347 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); 3348 return is_reference; 3349 } 3350 3351 // Support for java_lang_ref_SoftReference 3352 // 3353 3354 #define SOFTREFERENCE_FIELDS_DO(macro) \ 3355 macro(timestamp_offset, k, "timestamp", long_signature, false); \ 3356 macro(static_clock_offset, k, "clock", long_signature, true) 3357 3358 void java_lang_ref_SoftReference::compute_offsets() { 3359 InstanceKlass* k = SystemDictionary::SoftReference_klass(); 3360 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3361 } 3362 3363 #if INCLUDE_CDS 3364 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) { 3365 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3366 } 3367 #endif 3368 3369 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3370 return ref->long_field(timestamp_offset); 3371 } 3372 3373 jlong java_lang_ref_SoftReference::clock() { 3374 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3375 oop base = ik->static_field_base_raw(); 3376 return base->long_field(static_clock_offset); 3377 } 3378 3379 void java_lang_ref_SoftReference::set_clock(jlong value) { 3380 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3381 oop base = ik->static_field_base_raw(); 3382 base->long_field_put(static_clock_offset, value); 3383 } 3384 3385 // Support for java_lang_invoke_DirectMethodHandle 3386 3387 int java_lang_invoke_DirectMethodHandle::_member_offset; 3388 3389 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3390 oop member_name = NULL; 3391 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 3392 "a DirectMethodHandle oop is expected"); 3393 return dmh->obj_field(member_offset_in_bytes()); 3394 } 3395 3396 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 3397 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 3398 3399 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3400 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass(); 3401 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3402 } 3403 3404 #if INCLUDE_CDS 3405 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) { 3406 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3407 } 3408 #endif 3409 3410 // Support for java_lang_invoke_MethodHandle 3411 3412 int java_lang_invoke_MethodHandle::_type_offset; 3413 int java_lang_invoke_MethodHandle::_form_offset; 3414 3415 int java_lang_invoke_MemberName::_clazz_offset; 3416 int java_lang_invoke_MemberName::_name_offset; 3417 int java_lang_invoke_MemberName::_type_offset; 3418 int java_lang_invoke_MemberName::_flags_offset; 3419 int java_lang_invoke_MemberName::_method_offset; 3420 int java_lang_invoke_MemberName::_vmindex_offset; 3421 3422 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 3423 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 3424 3425 int java_lang_invoke_LambdaForm::_vmentry_offset; 3426 3427 #define METHODHANDLE_FIELDS_DO(macro) \ 3428 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 3429 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 3430 3431 void java_lang_invoke_MethodHandle::compute_offsets() { 3432 InstanceKlass* k = SystemDictionary::MethodHandle_klass(); 3433 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3434 } 3435 3436 #if INCLUDE_CDS 3437 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) { 3438 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3439 } 3440 #endif 3441 3442 #define MEMBERNAME_FIELDS_DO(macro) \ 3443 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3444 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3445 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 3446 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 3447 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 3448 3449 void java_lang_invoke_MemberName::compute_offsets() { 3450 InstanceKlass* k = SystemDictionary::MemberName_klass(); 3451 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3452 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3453 } 3454 3455 #if INCLUDE_CDS 3456 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) { 3457 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3458 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3459 } 3460 #endif 3461 3462 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 3463 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3464 assert(k != NULL, "jdk mismatch"); 3465 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3466 } 3467 3468 #if INCLUDE_CDS 3469 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) { 3470 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3471 } 3472 #endif 3473 3474 #define LAMBDAFORM_FIELDS_DO(macro) \ 3475 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 3476 3477 void java_lang_invoke_LambdaForm::compute_offsets() { 3478 InstanceKlass* k = SystemDictionary::LambdaForm_klass(); 3479 assert (k != NULL, "jdk mismatch"); 3480 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3481 } 3482 3483 #if INCLUDE_CDS 3484 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) { 3485 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3486 } 3487 #endif 3488 3489 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 3490 return obj != NULL && is_subclass(obj->klass()); 3491 } 3492 3493 3494 oop java_lang_invoke_MethodHandle::type(oop mh) { 3495 return mh->obj_field(_type_offset); 3496 } 3497 3498 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 3499 mh->obj_field_put(_type_offset, mtype); 3500 } 3501 3502 oop java_lang_invoke_MethodHandle::form(oop mh) { 3503 assert(_form_offset != 0, ""); 3504 return mh->obj_field(_form_offset); 3505 } 3506 3507 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 3508 assert(_form_offset != 0, ""); 3509 mh->obj_field_put(_form_offset, lform); 3510 } 3511 3512 /// MemberName accessors 3513 3514 oop java_lang_invoke_MemberName::clazz(oop mname) { 3515 assert(is_instance(mname), "wrong type"); 3516 return mname->obj_field(_clazz_offset); 3517 } 3518 3519 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 3520 assert(is_instance(mname), "wrong type"); 3521 mname->obj_field_put(_clazz_offset, clazz); 3522 } 3523 3524 oop java_lang_invoke_MemberName::name(oop mname) { 3525 assert(is_instance(mname), "wrong type"); 3526 return mname->obj_field(_name_offset); 3527 } 3528 3529 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 3530 assert(is_instance(mname), "wrong type"); 3531 mname->obj_field_put(_name_offset, name); 3532 } 3533 3534 oop java_lang_invoke_MemberName::type(oop mname) { 3535 assert(is_instance(mname), "wrong type"); 3536 return mname->obj_field(_type_offset); 3537 } 3538 3539 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 3540 assert(is_instance(mname), "wrong type"); 3541 mname->obj_field_put(_type_offset, type); 3542 } 3543 3544 int java_lang_invoke_MemberName::flags(oop mname) { 3545 assert(is_instance(mname), "wrong type"); 3546 return mname->int_field(_flags_offset); 3547 } 3548 3549 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 3550 assert(is_instance(mname), "wrong type"); 3551 mname->int_field_put(_flags_offset, flags); 3552 } 3553 3554 3555 // Return vmtarget from ResolvedMethodName method field through indirection 3556 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 3557 assert(is_instance(mname), "wrong type"); 3558 oop method = mname->obj_field(_method_offset); 3559 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method); 3560 } 3561 3562 bool java_lang_invoke_MemberName::is_method(oop mname) { 3563 assert(is_instance(mname), "must be MemberName"); 3564 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 3565 } 3566 3567 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 3568 assert(is_instance(mname), "wrong type"); 3569 mname->obj_field_put(_method_offset, resolved_method); 3570 } 3571 3572 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 3573 assert(is_instance(mname), "wrong type"); 3574 return (intptr_t) mname->address_field(_vmindex_offset); 3575 } 3576 3577 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 3578 assert(is_instance(mname), "wrong type"); 3579 mname->address_field_put(_vmindex_offset, (address) index); 3580 } 3581 3582 3583 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 3584 assert(is_instance(resolved_method), "wrong type"); 3585 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 3586 assert(m->is_method(), "must be"); 3587 return m; 3588 } 3589 3590 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 3591 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 3592 assert(is_instance(resolved_method), "wrong type"); 3593 resolved_method->address_field_put(_vmtarget_offset, (address)m); 3594 } 3595 3596 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 3597 // lookup ResolvedMethod oop in the table, or create a new one and intern it 3598 oop resolved_method = ResolvedMethodTable::find_method(m()); 3599 if (resolved_method == NULL) { 3600 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3601 if (!k->is_initialized()) { 3602 k->initialize(CHECK_NULL); 3603 } 3604 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 3605 new_resolved_method->address_field_put(_vmtarget_offset, (address)m()); 3606 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have 3607 // distinct loaders) to ensure the metadata is kept alive. 3608 // This mirror may be different than the one in clazz field. 3609 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror()); 3610 resolved_method = ResolvedMethodTable::add_method(Handle(THREAD, new_resolved_method)); 3611 } 3612 return resolved_method; 3613 } 3614 3615 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 3616 assert(is_instance(lform), "wrong type"); 3617 return lform->obj_field(_vmentry_offset); 3618 } 3619 3620 3621 // Support for java_lang_invoke_MethodType 3622 3623 int java_lang_invoke_MethodType::_rtype_offset; 3624 int java_lang_invoke_MethodType::_ptypes_offset; 3625 3626 #define METHODTYPE_FIELDS_DO(macro) \ 3627 macro(_rtype_offset, k, "rtype", class_signature, false); \ 3628 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 3629 3630 void java_lang_invoke_MethodType::compute_offsets() { 3631 InstanceKlass* k = SystemDictionary::MethodType_klass(); 3632 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3633 } 3634 3635 #if INCLUDE_CDS 3636 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) { 3637 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3638 } 3639 #endif 3640 3641 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 3642 st->print("("); 3643 objArrayOop pts = ptypes(mt); 3644 for (int i = 0, limit = pts->length(); i < limit; i++) { 3645 java_lang_Class::print_signature(pts->obj_at(i), st); 3646 } 3647 st->print(")"); 3648 java_lang_Class::print_signature(rtype(mt), st); 3649 } 3650 3651 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 3652 ResourceMark rm; 3653 stringStream buffer(128); 3654 print_signature(mt, &buffer); 3655 const char* sigstr = buffer.base(); 3656 int siglen = (int) buffer.size(); 3657 Symbol *name; 3658 if (!intern_if_not_found) { 3659 name = SymbolTable::probe(sigstr, siglen); 3660 } else { 3661 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 3662 } 3663 return name; 3664 } 3665 3666 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 3667 if (oopDesc::equals(mt1, mt2)) 3668 return true; 3669 if (!oopDesc::equals(rtype(mt1), rtype(mt2))) 3670 return false; 3671 if (ptype_count(mt1) != ptype_count(mt2)) 3672 return false; 3673 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 3674 if (!oopDesc::equals(ptype(mt1, i), ptype(mt2, i))) 3675 return false; 3676 } 3677 return true; 3678 } 3679 3680 oop java_lang_invoke_MethodType::rtype(oop mt) { 3681 assert(is_instance(mt), "must be a MethodType"); 3682 return mt->obj_field(_rtype_offset); 3683 } 3684 3685 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 3686 assert(is_instance(mt), "must be a MethodType"); 3687 return (objArrayOop) mt->obj_field(_ptypes_offset); 3688 } 3689 3690 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 3691 return ptypes(mt)->obj_at(idx); 3692 } 3693 3694 int java_lang_invoke_MethodType::ptype_count(oop mt) { 3695 return ptypes(mt)->length(); 3696 } 3697 3698 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 3699 objArrayOop pts = ptypes(mt); 3700 int count = pts->length(); 3701 int slots = 0; 3702 for (int i = 0; i < count; i++) { 3703 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 3704 slots += type2size[bt]; 3705 } 3706 return slots; 3707 } 3708 3709 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 3710 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 3711 return type2size[bt]; 3712 } 3713 3714 3715 // Support for java_lang_invoke_CallSite 3716 3717 int java_lang_invoke_CallSite::_target_offset; 3718 int java_lang_invoke_CallSite::_context_offset; 3719 3720 #define CALLSITE_FIELDS_DO(macro) \ 3721 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 3722 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false) 3723 3724 void java_lang_invoke_CallSite::compute_offsets() { 3725 InstanceKlass* k = SystemDictionary::CallSite_klass(); 3726 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3727 } 3728 3729 #if INCLUDE_CDS 3730 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) { 3731 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3732 } 3733 #endif 3734 3735 oop java_lang_invoke_CallSite::context(oop call_site) { 3736 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3737 3738 oop dep_oop = call_site->obj_field(_context_offset); 3739 return dep_oop; 3740 } 3741 3742 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3743 3744 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3745 3746 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3747 InstanceKlass* k = SystemDictionary::Context_klass(); 3748 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3749 } 3750 3751 #if INCLUDE_CDS 3752 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) { 3753 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3754 } 3755 #endif 3756 3757 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3758 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3759 intptr_t* vmdeps_addr = (intptr_t*)call_site->field_addr(_vmdependencies_offset); 3760 DependencyContext dep_ctx(vmdeps_addr); 3761 return dep_ctx; 3762 } 3763 3764 // Support for java_security_AccessControlContext 3765 3766 int java_security_AccessControlContext::_context_offset = 0; 3767 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3768 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3769 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3770 3771 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \ 3772 macro(_context_offset, k, "context", protectiondomain_signature, false); \ 3773 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \ 3774 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \ 3775 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false) 3776 3777 void java_security_AccessControlContext::compute_offsets() { 3778 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3779 InstanceKlass* k = SystemDictionary::AccessControlContext_klass(); 3780 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3781 } 3782 3783 #if INCLUDE_CDS 3784 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) { 3785 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3786 } 3787 #endif 3788 3789 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3790 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3791 // Ensure klass is initialized 3792 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0); 3793 // Allocate result 3794 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0); 3795 // Fill in values 3796 result->obj_field_put(_context_offset, context()); 3797 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3798 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3799 // whitelist AccessControlContexts created by the JVM if present 3800 if (_isAuthorized_offset != -1) { 3801 result->bool_field_put(_isAuthorized_offset, true); 3802 } 3803 return result; 3804 } 3805 3806 3807 // Support for java_lang_ClassLoader 3808 3809 bool java_lang_ClassLoader::offsets_computed = false; 3810 int java_lang_ClassLoader::_loader_data_offset = -1; 3811 int java_lang_ClassLoader::parallelCapable_offset = -1; 3812 int java_lang_ClassLoader::name_offset = -1; 3813 int java_lang_ClassLoader::nameAndId_offset = -1; 3814 int java_lang_ClassLoader::unnamedModule_offset = -1; 3815 3816 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) { 3817 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3818 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset); 3819 } 3820 3821 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) { 3822 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3823 return RawAccess<>::load_at(loader, _loader_data_offset); 3824 } 3825 3826 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) { 3827 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3828 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data); 3829 } 3830 3831 #define CLASSLOADER_FIELDS_DO(macro) \ 3832 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 3833 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 3834 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \ 3835 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 3836 macro(parent_offset, k1, "parent", classloader_signature, false) 3837 3838 void java_lang_ClassLoader::compute_offsets() { 3839 assert(!offsets_computed, "offsets should be initialized only once"); 3840 offsets_computed = true; 3841 3842 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass(); 3843 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3844 3845 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3846 } 3847 3848 #if INCLUDE_CDS 3849 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) { 3850 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3851 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3852 } 3853 #endif 3854 3855 oop java_lang_ClassLoader::parent(oop loader) { 3856 assert(is_instance(loader), "loader must be oop"); 3857 return loader->obj_field(parent_offset); 3858 } 3859 3860 // Returns the name field of this class loader. If the name field has not 3861 // been set, null will be returned. 3862 oop java_lang_ClassLoader::name(oop loader) { 3863 assert(is_instance(loader), "loader must be oop"); 3864 return loader->obj_field(name_offset); 3865 } 3866 3867 // Returns the nameAndId field of this class loader. The format is 3868 // as follows: 3869 // If the defining loader has a name explicitly set then '<loader-name>' @<id> 3870 // If the defining loader has no name then <qualified-class-name> @<id> 3871 // If built-in loader, then omit '@<id>' as there is only one instance. 3872 // Use ClassLoader::loader_name_id() to obtain this String as a char*. 3873 oop java_lang_ClassLoader::nameAndId(oop loader) { 3874 assert(is_instance(loader), "loader must be oop"); 3875 return loader->obj_field(nameAndId_offset); 3876 } 3877 3878 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 3879 assert(is_instance(loader), "loader must be oop"); 3880 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 3881 oop acl = loader; 3882 debug_only(jint loop_count = 0); 3883 // This loop taken verbatim from ClassLoader.java: 3884 do { 3885 acl = parent(acl); 3886 if (oopDesc::equals(cl, acl)) { 3887 return true; 3888 } 3889 assert(++loop_count > 0, "loop_count overflow"); 3890 } while (acl != NULL); 3891 return false; 3892 } 3893 3894 bool java_lang_ClassLoader::is_instance(oop obj) { 3895 return obj != NULL && is_subclass(obj->klass()); 3896 } 3897 3898 3899 // For class loader classes, parallelCapable defined 3900 // based on non-null field 3901 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 3902 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 3903 if (parallelCapable_offset == -1) { 3904 // Default for backward compatibility is false 3905 return false; 3906 } 3907 return (class_loader->obj_field(parallelCapable_offset) != NULL); 3908 } 3909 3910 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 3911 // Fix for 4474172; see evaluation for more details 3912 loader = non_reflection_class_loader(loader); 3913 3914 oop cl = SystemDictionary::java_system_loader(); 3915 while(cl != NULL) { 3916 if (oopDesc::equals(cl, loader)) return true; 3917 cl = parent(cl); 3918 } 3919 return false; 3920 } 3921 3922 // Return true if this is one of the class loaders associated with 3923 // the generated bytecodes for reflection. 3924 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 3925 if (loader != NULL) { 3926 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 3927 // This might be null in non-1.4 JDKs 3928 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)); 3929 } 3930 return false; 3931 } 3932 3933 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 3934 // See whether this is one of the class loaders associated with 3935 // the generated bytecodes for reflection, and if so, "magically" 3936 // delegate to its parent to prevent class loading from occurring 3937 // in places where applications using reflection didn't expect it. 3938 if (is_reflection_class_loader(loader)) { 3939 return parent(loader); 3940 } 3941 return loader; 3942 } 3943 3944 oop java_lang_ClassLoader::unnamedModule(oop loader) { 3945 assert(is_instance(loader), "loader must be oop"); 3946 return loader->obj_field(unnamedModule_offset); 3947 } 3948 3949 // Support for java_lang_System 3950 // 3951 #define SYSTEM_FIELDS_DO(macro) \ 3952 macro(static_in_offset, k, "in", input_stream_signature, true); \ 3953 macro(static_out_offset, k, "out", print_stream_signature, true); \ 3954 macro(static_err_offset, k, "err", print_stream_signature, true); \ 3955 macro(static_security_offset, k, "security", security_manager_signature, true) 3956 3957 void java_lang_System::compute_offsets() { 3958 InstanceKlass* k = SystemDictionary::System_klass(); 3959 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3960 } 3961 3962 #if INCLUDE_CDS 3963 void java_lang_System::serialize_offsets(SerializeClosure* f) { 3964 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3965 } 3966 #endif 3967 3968 int java_lang_System::in_offset_in_bytes() { return static_in_offset; } 3969 int java_lang_System::out_offset_in_bytes() { return static_out_offset; } 3970 int java_lang_System::err_offset_in_bytes() { return static_err_offset; } 3971 3972 int java_lang_Class::_klass_offset; 3973 int java_lang_Class::_array_klass_offset; 3974 int java_lang_Class::_oop_size_offset; 3975 int java_lang_Class::_static_oop_field_count_offset; 3976 int java_lang_Class::_class_loader_offset; 3977 int java_lang_Class::_module_offset; 3978 int java_lang_Class::_protection_domain_offset; 3979 int java_lang_Class::_component_mirror_offset; 3980 int java_lang_Class::_init_lock_offset; 3981 int java_lang_Class::_signers_offset; 3982 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 3983 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL; 3984 int java_lang_Throwable::backtrace_offset; 3985 int java_lang_Throwable::detailMessage_offset; 3986 int java_lang_Throwable::stackTrace_offset; 3987 int java_lang_Throwable::depth_offset; 3988 int java_lang_Throwable::static_unassigned_stacktrace_offset; 3989 int java_lang_reflect_AccessibleObject::override_offset; 3990 int java_lang_reflect_Method::clazz_offset; 3991 int java_lang_reflect_Method::name_offset; 3992 int java_lang_reflect_Method::returnType_offset; 3993 int java_lang_reflect_Method::parameterTypes_offset; 3994 int java_lang_reflect_Method::exceptionTypes_offset; 3995 int java_lang_reflect_Method::slot_offset; 3996 int java_lang_reflect_Method::modifiers_offset; 3997 int java_lang_reflect_Method::signature_offset; 3998 int java_lang_reflect_Method::annotations_offset; 3999 int java_lang_reflect_Method::parameter_annotations_offset; 4000 int java_lang_reflect_Method::annotation_default_offset; 4001 int java_lang_reflect_Constructor::clazz_offset; 4002 int java_lang_reflect_Constructor::parameterTypes_offset; 4003 int java_lang_reflect_Constructor::exceptionTypes_offset; 4004 int java_lang_reflect_Constructor::slot_offset; 4005 int java_lang_reflect_Constructor::modifiers_offset; 4006 int java_lang_reflect_Constructor::signature_offset; 4007 int java_lang_reflect_Constructor::annotations_offset; 4008 int java_lang_reflect_Constructor::parameter_annotations_offset; 4009 int java_lang_reflect_Field::clazz_offset; 4010 int java_lang_reflect_Field::name_offset; 4011 int java_lang_reflect_Field::type_offset; 4012 int java_lang_reflect_Field::slot_offset; 4013 int java_lang_reflect_Field::modifiers_offset; 4014 int java_lang_reflect_Field::signature_offset; 4015 int java_lang_reflect_Field::annotations_offset; 4016 int java_lang_reflect_Parameter::name_offset; 4017 int java_lang_reflect_Parameter::modifiers_offset; 4018 int java_lang_reflect_Parameter::index_offset; 4019 int java_lang_reflect_Parameter::executable_offset; 4020 int java_lang_boxing_object::value_offset; 4021 int java_lang_boxing_object::long_value_offset; 4022 int java_lang_ref_Reference::referent_offset; 4023 int java_lang_ref_Reference::queue_offset; 4024 int java_lang_ref_Reference::next_offset; 4025 int java_lang_ref_Reference::discovered_offset; 4026 int java_lang_ref_SoftReference::timestamp_offset; 4027 int java_lang_ref_SoftReference::static_clock_offset; 4028 int java_lang_ClassLoader::parent_offset; 4029 int java_lang_System::static_in_offset; 4030 int java_lang_System::static_out_offset; 4031 int java_lang_System::static_err_offset; 4032 int java_lang_System::static_security_offset; 4033 int java_lang_StackTraceElement::methodName_offset; 4034 int java_lang_StackTraceElement::fileName_offset; 4035 int java_lang_StackTraceElement::lineNumber_offset; 4036 int java_lang_StackTraceElement::moduleName_offset; 4037 int java_lang_StackTraceElement::moduleVersion_offset; 4038 int java_lang_StackTraceElement::classLoaderName_offset; 4039 int java_lang_StackTraceElement::declaringClass_offset; 4040 int java_lang_StackTraceElement::declaringClassObject_offset; 4041 int java_lang_StackFrameInfo::_memberName_offset; 4042 int java_lang_StackFrameInfo::_bci_offset; 4043 int java_lang_StackFrameInfo::_version_offset; 4044 int java_lang_LiveStackFrameInfo::_monitors_offset; 4045 int java_lang_LiveStackFrameInfo::_locals_offset; 4046 int java_lang_LiveStackFrameInfo::_operands_offset; 4047 int java_lang_LiveStackFrameInfo::_mode_offset; 4048 int java_lang_AssertionStatusDirectives::classes_offset; 4049 int java_lang_AssertionStatusDirectives::classEnabled_offset; 4050 int java_lang_AssertionStatusDirectives::packages_offset; 4051 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 4052 int java_lang_AssertionStatusDirectives::deflt_offset; 4053 int java_nio_Buffer::_limit_offset; 4054 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset; 4055 int reflect_ConstantPool::_oop_offset; 4056 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 4057 4058 4059 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4060 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4061 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4062 macro(moduleName_offset, k, "moduleName", string_signature, false); \ 4063 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4064 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \ 4065 macro(methodName_offset, k, "methodName", string_signature, false); \ 4066 macro(fileName_offset, k, "fileName", string_signature, false); \ 4067 macro(lineNumber_offset, k, "lineNumber", int_signature, false) 4068 4069 // Support for java_lang_StackTraceElement 4070 void java_lang_StackTraceElement::compute_offsets() { 4071 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 4072 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4073 } 4074 4075 #if INCLUDE_CDS 4076 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) { 4077 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4078 } 4079 #endif 4080 4081 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 4082 element->obj_field_put(fileName_offset, value); 4083 } 4084 4085 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 4086 element->obj_field_put(declaringClass_offset, value); 4087 } 4088 4089 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 4090 element->obj_field_put(methodName_offset, value); 4091 } 4092 4093 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 4094 element->int_field_put(lineNumber_offset, value); 4095 } 4096 4097 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 4098 element->obj_field_put(moduleName_offset, value); 4099 } 4100 4101 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 4102 element->obj_field_put(moduleVersion_offset, value); 4103 } 4104 4105 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 4106 element->obj_field_put(classLoaderName_offset, value); 4107 } 4108 4109 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 4110 element->obj_field_put(declaringClassObject_offset, value); 4111 } 4112 4113 void java_lang_StackFrameInfo::set_version(oop element, short value) { 4114 element->short_field_put(_version_offset, value); 4115 } 4116 4117 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 4118 element->int_field_put(_bci_offset, value); 4119 } 4120 4121 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 4122 element->obj_field_put(_monitors_offset, value); 4123 } 4124 4125 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 4126 element->obj_field_put(_locals_offset, value); 4127 } 4128 4129 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 4130 element->obj_field_put(_operands_offset, value); 4131 } 4132 4133 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) { 4134 element->int_field_put(_mode_offset, value); 4135 } 4136 4137 // Support for java Assertions - java_lang_AssertionStatusDirectives. 4138 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 4139 macro(classes_offset, k, "classes", string_array_signature, false); \ 4140 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 4141 macro(packages_offset, k, "packages", string_array_signature, false); \ 4142 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 4143 macro(deflt_offset, k, "deflt", bool_signature, false) 4144 4145 void java_lang_AssertionStatusDirectives::compute_offsets() { 4146 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass(); 4147 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4148 } 4149 4150 #if INCLUDE_CDS 4151 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) { 4152 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4153 } 4154 #endif 4155 4156 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 4157 o->obj_field_put(classes_offset, val); 4158 } 4159 4160 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 4161 o->obj_field_put(classEnabled_offset, val); 4162 } 4163 4164 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 4165 o->obj_field_put(packages_offset, val); 4166 } 4167 4168 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 4169 o->obj_field_put(packageEnabled_offset, val); 4170 } 4171 4172 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 4173 o->bool_field_put(deflt_offset, val); 4174 } 4175 4176 4177 // Support for intrinsification of java.nio.Buffer.checkIndex 4178 int java_nio_Buffer::limit_offset() { 4179 return _limit_offset; 4180 } 4181 4182 #define BUFFER_FIELDS_DO(macro) \ 4183 macro(_limit_offset, k, "limit", int_signature, false) 4184 4185 void java_nio_Buffer::compute_offsets() { 4186 InstanceKlass* k = SystemDictionary::nio_Buffer_klass(); 4187 assert(k != NULL, "must be loaded in 1.4+"); 4188 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4189 } 4190 4191 #if INCLUDE_CDS 4192 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) { 4193 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4194 } 4195 #endif 4196 4197 #define AOS_FIELDS_DO(macro) \ 4198 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false) 4199 4200 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() { 4201 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass(); 4202 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4203 } 4204 4205 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 4206 assert(_owner_offset != 0, "Must be initialized"); 4207 return obj->obj_field(_owner_offset); 4208 } 4209 4210 #if INCLUDE_CDS 4211 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) { 4212 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4213 } 4214 #endif 4215 4216 static int member_offset(int hardcoded_offset) { 4217 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes(); 4218 } 4219 4220 // Compute hard-coded offsets 4221 // Invoked before SystemDictionary::initialize, so pre-loaded classes 4222 // are not available to determine the offset_of_static_fields. 4223 void JavaClasses::compute_hard_coded_offsets() { 4224 4225 // java_lang_boxing_object 4226 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset); 4227 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong); 4228 4229 // java_lang_ref_Reference 4230 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset); 4231 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset); 4232 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset); 4233 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset); 4234 } 4235 4236 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets(); 4237 4238 // Compute non-hard-coded field offsets of all the classes in this file 4239 void JavaClasses::compute_offsets() { 4240 if (UseSharedSpaces) { 4241 assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() && 4242 JvmtiExport::has_early_class_hook_env()), 4243 "JavaClasses::compute_offsets() must be called in early JVMTI phase."); 4244 // None of the classes used by the rest of this function can be replaced by 4245 // JMVTI ClassFileLoadHook. 4246 // We are safe to use the archived offsets, which have already been restored 4247 // by JavaClasses::serialize_offsets, without computing the offsets again. 4248 return; 4249 } 4250 4251 // We have already called the compute_offsets() of the 4252 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class) 4253 // earlier inside SystemDictionary::resolve_well_known_classes() 4254 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS); 4255 4256 // generated interpreter code wants to know about the offsets we just computed: 4257 AbstractAssembler::update_delayed_values(); 4258 } 4259 4260 #if INCLUDE_CDS 4261 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc); 4262 4263 void JavaClasses::serialize_offsets(SerializeClosure* soc) { 4264 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS); 4265 } 4266 #endif 4267 4268 4269 #ifndef PRODUCT 4270 4271 // These functions exist to assert the validity of hard-coded field offsets to guard 4272 // against changes in the class files 4273 4274 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 4275 EXCEPTION_MARK; 4276 fieldDescriptor fd; 4277 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 4278 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 4279 InstanceKlass* ik = InstanceKlass::cast(k); 4280 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 4281 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 4282 if (!ik->find_local_field(f_name, f_sig, &fd)) { 4283 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 4284 return false; 4285 } 4286 if (fd.is_static()) { 4287 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 4288 return false; 4289 } 4290 if (fd.offset() == hardcoded_offset ) { 4291 return true; 4292 } else { 4293 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 4294 klass_name, field_name, hardcoded_offset, fd.offset()); 4295 return false; 4296 } 4297 } 4298 4299 // Check the hard-coded field offsets of all the classes in this file 4300 4301 void JavaClasses::check_offsets() { 4302 bool valid = true; 4303 4304 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4305 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 4306 4307 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4308 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 4309 4310 // Boxed primitive objects (java_lang_boxing_object) 4311 4312 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 4313 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 4314 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 4315 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 4316 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 4317 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 4318 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 4319 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 4320 4321 // java.lang.ref.Reference 4322 4323 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 4324 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 4325 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 4326 // Fake field 4327 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 4328 4329 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 4330 } 4331 4332 #endif // PRODUCT 4333 4334 int InjectedField::compute_offset() { 4335 InstanceKlass* ik = InstanceKlass::cast(klass()); 4336 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4337 if (!may_be_java && !fs.access_flags().is_internal()) { 4338 // Only look at injected fields 4339 continue; 4340 } 4341 if (fs.name() == name() && fs.signature() == signature()) { 4342 return fs.offset(); 4343 } 4344 } 4345 ResourceMark rm; 4346 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)" : ""); 4347 #ifndef PRODUCT 4348 ik->print(); 4349 tty->print_cr("all fields:"); 4350 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4351 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 4352 } 4353 #endif //PRODUCT 4354 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 4355 return -1; 4356 } 4357 4358 void javaClasses_init() { 4359 JavaClasses::compute_offsets(); 4360 JavaClasses::check_offsets(); 4361 FilteredFieldsMap::initialize(); // must be done after computing offsets. 4362 }