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/resolvedMethodTable.hpp" 54 #include "runtime/fieldDescriptor.inline.hpp" 55 #include "runtime/frame.inline.hpp" 56 #include "runtime/handles.inline.hpp" 57 #include "runtime/interfaceSupport.inline.hpp" 58 #include "runtime/java.hpp" 59 #include "runtime/javaCalls.hpp" 60 #include "runtime/jniHandles.inline.hpp" 61 #include "runtime/safepoint.hpp" 62 #include "runtime/safepointVerifiers.hpp" 63 #include "runtime/thread.inline.hpp" 64 #include "runtime/vframe.inline.hpp" 65 #include "utilities/align.hpp" 66 #include "utilities/preserveException.hpp" 67 #if INCLUDE_JVMCI 68 #include "jvmci/jvmciJavaClasses.hpp" 69 #endif 70 71 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 72 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 73 74 #if INCLUDE_CDS 75 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \ 76 f->do_u4((u4*)&_##name##_offset); 77 #endif 78 79 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 80 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 81 82 InjectedField JavaClasses::_injected_fields[] = { 83 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 84 }; 85 86 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 87 return _injected_fields[id].compute_offset(); 88 } 89 90 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 91 *field_count = 0; 92 93 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 94 if (sid == vmSymbols::NO_SID) { 95 // Only well known classes can inject fields 96 return NULL; 97 } 98 99 int count = 0; 100 int start = -1; 101 102 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 103 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 104 count++; \ 105 if (start == -1) start = klass##_##name##_enum; \ 106 } 107 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 108 #undef LOOKUP_INJECTED_FIELD 109 110 if (start != -1) { 111 *field_count = count; 112 return _injected_fields + start; 113 } 114 return NULL; 115 } 116 117 118 // Helpful routine for computing field offsets at run time rather than hardcoding them 119 // Finds local fields only, including static fields. Static field offsets are from the 120 // beginning of the mirror. 121 static void compute_offset(int &dest_offset, 122 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol, 123 bool is_static = false) { 124 fieldDescriptor fd; 125 if (ik == NULL) { 126 ResourceMark rm; 127 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string()); 128 vm_exit_during_initialization("Invalid layout of preloaded class"); 129 } 130 131 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) { 132 ResourceMark rm; 133 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(), 134 name_symbol->as_C_string(), signature_symbol->as_C_string()); 135 #ifndef PRODUCT 136 // Prints all fields and offsets 137 Log(class) lt; 138 LogStream ls(lt.error()); 139 ik->print_on(&ls); 140 #endif //PRODUCT 141 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class"); 142 } 143 dest_offset = fd.offset(); 144 } 145 146 // Overloading to pass name as a string. 147 static void compute_offset(int& dest_offset, InstanceKlass* ik, 148 const char* name_string, Symbol* signature_symbol, 149 bool is_static = false) { 150 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string)); 151 if (name == NULL) { 152 ResourceMark rm; 153 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string); 154 vm_exit_during_initialization("Invalid layout of preloaded class", ik->external_name()); 155 } 156 compute_offset(dest_offset, ik, name, signature_symbol, is_static); 157 } 158 159 int java_lang_String::value_offset = 0; 160 int java_lang_String::hash_offset = 0; 161 int java_lang_String::coder_offset = 0; 162 163 bool java_lang_String::initialized = false; 164 165 bool java_lang_String::is_instance(oop obj) { 166 return is_instance_inlined(obj); 167 } 168 169 #if INCLUDE_CDS 170 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \ 171 f->do_u4((u4*)&offset) 172 #endif 173 174 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \ 175 compute_offset(offset, klass, name, vmSymbols::signature(), is_static) 176 177 #define STRING_FIELDS_DO(macro) \ 178 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \ 179 macro(hash_offset, k, "hash", int_signature, false); \ 180 macro(coder_offset, k, "coder", byte_signature, false) 181 182 void java_lang_String::compute_offsets() { 183 if (initialized) { 184 return; 185 } 186 187 InstanceKlass* k = SystemDictionary::String_klass(); 188 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 189 190 initialized = true; 191 } 192 193 #if INCLUDE_CDS 194 void java_lang_String::serialize_offsets(SerializeClosure* f) { 195 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 196 f->do_u4((u4*)&initialized); 197 } 198 #endif 199 200 class CompactStringsFixup : public FieldClosure { 201 private: 202 bool _value; 203 204 public: 205 CompactStringsFixup(bool value) : _value(value) {} 206 207 void do_field(fieldDescriptor* fd) { 208 if (fd->name() == vmSymbols::compact_strings_name()) { 209 oop mirror = fd->field_holder()->java_mirror(); 210 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String"); 211 assert(mirror != NULL, "String must have mirror already"); 212 mirror->bool_field_put(fd->offset(), _value); 213 } 214 } 215 }; 216 217 void java_lang_String::set_compact_strings(bool value) { 218 CompactStringsFixup fix(value); 219 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix); 220 } 221 222 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 223 assert(initialized, "Must be initialized"); 224 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 225 226 // Create the String object first, so there's a chance that the String 227 // and the char array it points to end up in the same cache line. 228 oop obj; 229 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH); 230 231 // Create the char array. The String object must be handlized here 232 // because GC can happen as a result of the allocation attempt. 233 Handle h_obj(THREAD, obj); 234 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 235 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 236 237 // Point the String at the char array 238 obj = h_obj(); 239 set_value(obj, buffer); 240 // No need to zero the offset, allocation zero'ed the entire String object 241 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 242 return h_obj; 243 } 244 245 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) { 246 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 247 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 248 typeArrayOop buffer = value(h_obj()); 249 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 250 if (is_latin1) { 251 for (int index = 0; index < length; index++) { 252 buffer->byte_at_put(index, (jbyte)unicode[index]); 253 } 254 } else { 255 for (int index = 0; index < length; index++) { 256 buffer->char_at_put(index, unicode[index]); 257 } 258 } 259 260 #ifdef ASSERT 261 { 262 ResourceMark rm; 263 char* expected = UNICODE::as_utf8(unicode, length); 264 char* actual = as_utf8_string(h_obj()); 265 if (strcmp(expected, actual) != 0) { 266 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual); 267 ShouldNotReachHere(); 268 } 269 } 270 #endif 271 272 return h_obj; 273 } 274 275 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) { 276 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 277 return h_obj(); 278 } 279 280 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 281 if (utf8_str == NULL) { 282 return Handle(); 283 } 284 bool has_multibyte, is_latin1; 285 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 286 if (!CompactStrings) { 287 has_multibyte = true; 288 is_latin1 = false; 289 } 290 291 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 292 if (length > 0) { 293 if (!has_multibyte) { 294 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 295 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 296 } else if (is_latin1) { 297 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 298 } else { 299 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 300 } 301 } 302 303 #ifdef ASSERT 304 // This check is too strict because the input string is not necessarily valid UTF8. 305 // For example, it may be created with arbitrary content via jni_NewStringUTF. 306 /* 307 { 308 ResourceMark rm; 309 const char* expected = utf8_str; 310 char* actual = as_utf8_string(h_obj()); 311 if (strcmp(expected, actual) != 0) { 312 tty->print_cr("String conversion failure: %s --> %s", expected, actual); 313 ShouldNotReachHere(); 314 } 315 } 316 */ 317 #endif 318 319 return h_obj; 320 } 321 322 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 323 Handle h_obj = create_from_str(utf8_str, CHECK_0); 324 return h_obj(); 325 } 326 327 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 328 const char* utf8_str = (char*)symbol->bytes(); 329 int utf8_len = symbol->utf8_length(); 330 331 bool has_multibyte, is_latin1; 332 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 333 if (!CompactStrings) { 334 has_multibyte = true; 335 is_latin1 = false; 336 } 337 338 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 339 if (length > 0) { 340 if (!has_multibyte) { 341 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 342 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 343 } else if (is_latin1) { 344 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 345 } else { 346 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 347 } 348 } 349 350 #ifdef ASSERT 351 { 352 ResourceMark rm; 353 const char* expected = symbol->as_utf8(); 354 char* actual = as_utf8_string(h_obj()); 355 if (strncmp(expected, actual, utf8_len) != 0) { 356 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual); 357 ShouldNotReachHere(); 358 } 359 } 360 #endif 361 362 return h_obj; 363 } 364 365 // Converts a C string to a Java String based on current encoding 366 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 367 assert(str != NULL, "bad arguments"); 368 369 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 370 static to_java_string_fn_t _to_java_string_fn = NULL; 371 372 if (_to_java_string_fn == NULL) { 373 void *lib_handle = os::native_java_library(); 374 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 375 if (_to_java_string_fn == NULL) { 376 fatal("NewStringPlatform missing"); 377 } 378 } 379 380 jstring js = NULL; 381 { JavaThread* thread = (JavaThread*)THREAD; 382 assert(thread->is_Java_thread(), "must be java thread"); 383 HandleMark hm(thread); 384 ThreadToNativeFromVM ttn(thread); 385 js = (_to_java_string_fn)(thread->jni_environment(), str); 386 } 387 return Handle(THREAD, JNIHandles::resolve(js)); 388 } 389 390 // Converts a Java String to a native C string that can be used for 391 // native OS calls. 392 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 393 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 394 static to_platform_string_fn_t _to_platform_string_fn = NULL; 395 396 if (_to_platform_string_fn == NULL) { 397 void *lib_handle = os::native_java_library(); 398 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 399 if (_to_platform_string_fn == NULL) { 400 fatal("GetStringPlatformChars missing"); 401 } 402 } 403 404 char *native_platform_string; 405 { JavaThread* thread = (JavaThread*)THREAD; 406 assert(thread->is_Java_thread(), "must be java thread"); 407 JNIEnv *env = thread->jni_environment(); 408 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 409 bool is_copy; 410 HandleMark hm(thread); 411 ThreadToNativeFromVM ttn(thread); 412 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 413 assert(is_copy == JNI_TRUE, "is_copy value changed"); 414 JNIHandles::destroy_local(js); 415 } 416 return native_platform_string; 417 } 418 419 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 420 oop obj = java_string(); 421 // Typical usage is to convert all '/' to '.' in string. 422 typeArrayOop value = java_lang_String::value(obj); 423 int length = java_lang_String::length(obj); 424 bool is_latin1 = java_lang_String::is_latin1(obj); 425 426 // First check if any from_char exist 427 int index; // Declared outside, used later 428 for (index = 0; index < length; index++) { 429 jchar c = !is_latin1 ? value->char_at(index) : 430 ((jchar) value->byte_at(index)) & 0xff; 431 if (c == from_char) { 432 break; 433 } 434 } 435 if (index == length) { 436 // No from_char, so do not copy. 437 return java_string; 438 } 439 440 // Check if result string will be latin1 441 bool to_is_latin1 = false; 442 443 // Replacement char must be latin1 444 if (CompactStrings && UNICODE::is_latin1(to_char)) { 445 if (is_latin1) { 446 // Source string is latin1 as well 447 to_is_latin1 = true; 448 } else if (!UNICODE::is_latin1(from_char)) { 449 // We are replacing an UTF16 char. Scan string to 450 // check if result can be latin1 encoded. 451 to_is_latin1 = true; 452 for (index = 0; index < length; index++) { 453 jchar c = value->char_at(index); 454 if (c != from_char && !UNICODE::is_latin1(c)) { 455 to_is_latin1 = false; 456 break; 457 } 458 } 459 } 460 } 461 462 // Create new UNICODE (or byte) buffer. Must handlize value because GC 463 // may happen during String and char array creation. 464 typeArrayHandle h_value(THREAD, value); 465 Handle string = basic_create(length, to_is_latin1, CHECK_NH); 466 typeArrayOop from_buffer = h_value(); 467 typeArrayOop to_buffer = java_lang_String::value(string()); 468 469 // Copy contents 470 for (index = 0; index < length; index++) { 471 jchar c = (!is_latin1) ? from_buffer->char_at(index) : 472 ((jchar) from_buffer->byte_at(index)) & 0xff; 473 if (c == from_char) { 474 c = to_char; 475 } 476 if (!to_is_latin1) { 477 to_buffer->char_at_put(index, c); 478 } else { 479 to_buffer->byte_at_put(index, (jbyte) c); 480 } 481 } 482 return string; 483 } 484 485 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 486 typeArrayOop value = java_lang_String::value(java_string); 487 length = java_lang_String::length(java_string); 488 bool is_latin1 = java_lang_String::is_latin1(java_string); 489 490 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 491 if (result != NULL) { 492 if (!is_latin1) { 493 for (int index = 0; index < length; index++) { 494 result[index] = value->char_at(index); 495 } 496 } else { 497 for (int index = 0; index < length; index++) { 498 result[index] = ((jchar) value->byte_at(index)) & 0xff; 499 } 500 } 501 } else { 502 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 503 } 504 return result; 505 } 506 507 unsigned int java_lang_String::hash_code(oop java_string) { 508 int length = java_lang_String::length(java_string); 509 // Zero length string will hash to zero with String.hashCode() function. 510 if (length == 0) return 0; 511 512 typeArrayOop value = java_lang_String::value(java_string); 513 bool is_latin1 = java_lang_String::is_latin1(java_string); 514 515 if (is_latin1) { 516 return java_lang_String::hash_code(value->byte_at_addr(0), length); 517 } else { 518 return java_lang_String::hash_code(value->char_at_addr(0), length); 519 } 520 } 521 522 char* java_lang_String::as_quoted_ascii(oop java_string) { 523 typeArrayOop value = java_lang_String::value(java_string); 524 int length = java_lang_String::length(java_string); 525 bool is_latin1 = java_lang_String::is_latin1(java_string); 526 527 if (length == 0) return NULL; 528 529 char* result; 530 int result_length; 531 if (!is_latin1) { 532 jchar* base = value->char_at_addr(0); 533 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 534 result = NEW_RESOURCE_ARRAY(char, result_length); 535 UNICODE::as_quoted_ascii(base, length, result, result_length); 536 } else { 537 jbyte* base = value->byte_at_addr(0); 538 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 539 result = NEW_RESOURCE_ARRAY(char, result_length); 540 UNICODE::as_quoted_ascii(base, length, result, result_length); 541 } 542 assert(result_length >= length + 1, "must not be shorter"); 543 assert(result_length == (int)strlen(result) + 1, "must match"); 544 return result; 545 } 546 547 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) { 548 typeArrayOop value = java_lang_String::value(java_string); 549 int length = java_lang_String::length(java_string); 550 bool is_latin1 = java_lang_String::is_latin1(java_string); 551 if (!is_latin1) { 552 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 553 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 554 return sym; 555 } else { 556 ResourceMark rm; 557 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 558 const char* base = UNICODE::as_utf8(position, length); 559 Symbol* sym = SymbolTable::lookup(base, length, THREAD); 560 return sym; 561 } 562 } 563 564 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 565 typeArrayOop value = java_lang_String::value(java_string); 566 int length = java_lang_String::length(java_string); 567 bool is_latin1 = java_lang_String::is_latin1(java_string); 568 if (!is_latin1) { 569 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 570 return SymbolTable::probe_unicode(base, length); 571 } else { 572 ResourceMark rm; 573 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 574 const char* base = UNICODE::as_utf8(position, length); 575 return SymbolTable::probe(base, length); 576 } 577 } 578 579 int java_lang_String::utf8_length(oop java_string) { 580 typeArrayOop value = java_lang_String::value(java_string); 581 int length = java_lang_String::length(java_string); 582 bool is_latin1 = java_lang_String::is_latin1(java_string); 583 if (length == 0) { 584 return 0; 585 } 586 if (!is_latin1) { 587 return UNICODE::utf8_length(value->char_at_addr(0), length); 588 } else { 589 return UNICODE::utf8_length(value->byte_at_addr(0), length); 590 } 591 } 592 593 char* java_lang_String::as_utf8_string(oop java_string) { 594 typeArrayOop value = java_lang_String::value(java_string); 595 int length = java_lang_String::length(java_string); 596 bool is_latin1 = java_lang_String::is_latin1(java_string); 597 if (!is_latin1) { 598 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 599 return UNICODE::as_utf8(position, length); 600 } else { 601 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 602 return UNICODE::as_utf8(position, length); 603 } 604 } 605 606 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 607 typeArrayOop value = java_lang_String::value(java_string); 608 int length = java_lang_String::length(java_string); 609 bool is_latin1 = java_lang_String::is_latin1(java_string); 610 if (!is_latin1) { 611 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 612 return UNICODE::as_utf8(position, length, buf, buflen); 613 } else { 614 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 615 return UNICODE::as_utf8(position, length, buf, buflen); 616 } 617 } 618 619 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 620 typeArrayOop value = java_lang_String::value(java_string); 621 int length = java_lang_String::length(java_string); 622 assert(start + len <= length, "just checking"); 623 bool is_latin1 = java_lang_String::is_latin1(java_string); 624 if (!is_latin1) { 625 jchar* position = value->char_at_addr(start); 626 return UNICODE::as_utf8(position, len); 627 } else { 628 jbyte* position = value->byte_at_addr(start); 629 return UNICODE::as_utf8(position, len); 630 } 631 } 632 633 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) { 634 typeArrayOop value = java_lang_String::value(java_string); 635 int length = java_lang_String::length(java_string); 636 assert(start + len <= length, "just checking"); 637 bool is_latin1 = java_lang_String::is_latin1(java_string); 638 if (!is_latin1) { 639 jchar* position = value->char_at_addr(start); 640 return UNICODE::as_utf8(position, len, buf, buflen); 641 } else { 642 jbyte* position = value->byte_at_addr(start); 643 return UNICODE::as_utf8(position, len, buf, buflen); 644 } 645 } 646 647 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) { 648 assert(java_string->klass() == SystemDictionary::String_klass(), 649 "must be java_string"); 650 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 651 int length = java_lang_String::length(java_string); 652 if (length != len) { 653 return false; 654 } 655 bool is_latin1 = java_lang_String::is_latin1(java_string); 656 if (!is_latin1) { 657 for (int i = 0; i < len; i++) { 658 if (value->char_at(i) != chars[i]) { 659 return false; 660 } 661 } 662 } else { 663 for (int i = 0; i < len; i++) { 664 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 665 return false; 666 } 667 } 668 } 669 return true; 670 } 671 672 bool java_lang_String::equals(oop str1, oop str2) { 673 assert(str1->klass() == SystemDictionary::String_klass(), 674 "must be java String"); 675 assert(str2->klass() == SystemDictionary::String_klass(), 676 "must be java String"); 677 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1); 678 int length1 = java_lang_String::length(str1); 679 bool is_latin1 = java_lang_String::is_latin1(str1); 680 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2); 681 int length2 = java_lang_String::length(str2); 682 bool is_latin2 = java_lang_String::is_latin1(str2); 683 684 if ((length1 != length2) || (is_latin1 != is_latin2)) { 685 // Strings of different size or with different 686 // coders are never equal. 687 return false; 688 } 689 int blength1 = value1->length(); 690 for (int i = 0; i < blength1; i++) { 691 if (value1->byte_at(i) != value2->byte_at(i)) { 692 return false; 693 } 694 } 695 return true; 696 } 697 698 void java_lang_String::print(oop java_string, outputStream* st) { 699 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 700 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 701 702 if (value == NULL) { 703 // This can happen if, e.g., printing a String 704 // object before its initializer has been called 705 st->print("NULL"); 706 return; 707 } 708 709 int length = java_lang_String::length(java_string); 710 bool is_latin1 = java_lang_String::is_latin1(java_string); 711 712 st->print("\""); 713 for (int index = 0; index < length; index++) { 714 st->print("%c", (!is_latin1) ? value->char_at(index) : 715 ((jchar) value->byte_at(index)) & 0xff ); 716 } 717 st->print("\""); 718 } 719 720 721 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 722 assert(mirror.not_null() && fd->is_static(), "just checking"); 723 if (fd->has_initial_value()) { 724 BasicType t = fd->field_type(); 725 switch (t) { 726 case T_BYTE: 727 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 728 break; 729 case T_BOOLEAN: 730 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 731 break; 732 case T_CHAR: 733 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 734 break; 735 case T_SHORT: 736 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 737 break; 738 case T_INT: 739 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 740 break; 741 case T_FLOAT: 742 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 743 break; 744 case T_DOUBLE: 745 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 746 break; 747 case T_LONG: 748 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 749 break; 750 case T_OBJECT: 751 { 752 assert(fd->signature() == vmSymbols::string_signature(), 753 "just checking"); 754 if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) { 755 // Archive the String field and update the pointer. 756 oop s = mirror()->obj_field(fd->offset()); 757 oop archived_s = StringTable::create_archived_string(s, CHECK); 758 mirror()->obj_field_put(fd->offset(), archived_s); 759 } else { 760 oop string = fd->string_initial_value(CHECK); 761 mirror()->obj_field_put(fd->offset(), string); 762 } 763 } 764 break; 765 default: 766 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 767 "Illegal ConstantValue attribute in class file"); 768 } 769 } 770 } 771 772 773 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 774 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 775 776 // If the offset was read from the shared archive, it was fixed up already 777 if (!k->is_shared()) { 778 if (k->is_instance_klass()) { 779 // During bootstrap, java.lang.Class wasn't loaded so static field 780 // offsets were computed without the size added it. Go back and 781 // update all the static field offsets to included the size. 782 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) { 783 if (fs.access_flags().is_static()) { 784 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 785 fs.set_offset(real_offset); 786 } 787 } 788 } 789 } 790 791 if (k->is_shared() && k->has_raw_archived_mirror()) { 792 if (HeapShared::open_archive_heap_region_mapped()) { 793 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK); 794 assert(present, "Missing archived mirror for %s", k->external_name()); 795 return; 796 } else { 797 k->set_java_mirror_handle(NULL); 798 k->clear_has_raw_archived_mirror(); 799 } 800 } 801 create_mirror(k, Handle(), Handle(), Handle(), CHECK); 802 } 803 804 void java_lang_Class::initialize_mirror_fields(Klass* k, 805 Handle mirror, 806 Handle protection_domain, 807 TRAPS) { 808 // Allocate a simple java object for a lock. 809 // This needs to be a java object because during class initialization 810 // it can be held across a java call. 811 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 812 set_init_lock(mirror(), r); 813 814 // Set protection domain also 815 set_protection_domain(mirror(), protection_domain()); 816 817 // Initialize static fields 818 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 819 } 820 821 // Set the java.lang.Module module field in the java_lang_Class mirror 822 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) { 823 if (module.is_null()) { 824 // During startup, the module may be NULL only if java.base has not been defined yet. 825 // Put the class on the fixup_module_list to patch later when the java.lang.Module 826 // for java.base is known. 827 assert(!Universe::is_module_initialized(), "Incorrect java.lang.Module pre module system initialization"); 828 829 bool javabase_was_defined = false; 830 { 831 MutexLocker m1(Module_lock, THREAD); 832 // Keep list of classes needing java.base module fixup 833 if (!ModuleEntryTable::javabase_defined()) { 834 assert(k->java_mirror() != NULL, "Class's mirror is null"); 835 k->class_loader_data()->inc_keep_alive(); 836 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized"); 837 fixup_module_field_list()->push(k); 838 } else { 839 javabase_was_defined = true; 840 } 841 } 842 843 // If java.base was already defined then patch this particular class with java.base. 844 if (javabase_was_defined) { 845 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 846 assert(javabase_entry != NULL && javabase_entry->module() != NULL, 847 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 848 Handle javabase_handle(THREAD, javabase_entry->module()); 849 set_module(mirror(), javabase_handle()); 850 } 851 } else { 852 assert(Universe::is_module_initialized() || 853 (ModuleEntryTable::javabase_defined() && 854 (oopDesc::equals(module(), ModuleEntryTable::javabase_moduleEntry()->module()))), 855 "Incorrect java.lang.Module specification while creating mirror"); 856 set_module(mirror(), module()); 857 } 858 } 859 860 // Statically allocate fixup lists because they always get created. 861 void java_lang_Class::allocate_fixup_lists() { 862 GrowableArray<Klass*>* mirror_list = 863 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 864 set_fixup_mirror_list(mirror_list); 865 866 GrowableArray<Klass*>* module_list = 867 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true); 868 set_fixup_module_field_list(module_list); 869 } 870 871 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 872 Handle module, Handle protection_domain, TRAPS) { 873 assert(k != NULL, "Use create_basic_type_mirror for primitive types"); 874 assert(k->java_mirror() == NULL, "should only assign mirror once"); 875 876 // Use this moment of initialization to cache modifier_flags also, 877 // to support Class.getModifiers(). Instance classes recalculate 878 // the cached flags after the class file is parsed, but before the 879 // class is put into the system dictionary. 880 int computed_modifiers = k->compute_modifier_flags(CHECK); 881 k->set_modifier_flags(computed_modifiers); 882 // Class_klass has to be loaded because it is used to allocate 883 // the mirror. 884 if (SystemDictionary::Class_klass_loaded()) { 885 // Allocate mirror (java.lang.Class instance) 886 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 887 Handle mirror(THREAD, mirror_oop); 888 Handle comp_mirror; 889 890 // Setup indirection from mirror->klass 891 java_lang_Class::set_klass(mirror(), k); 892 893 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 894 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 895 896 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 897 898 // It might also have a component mirror. This mirror must already exist. 899 if (k->is_array_klass()) { 900 if (k->is_typeArray_klass()) { 901 BasicType type = TypeArrayKlass::cast(k)->element_type(); 902 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 903 } else { 904 assert(k->is_objArray_klass(), "Must be"); 905 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 906 assert(element_klass != NULL, "Must have an element klass"); 907 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 908 } 909 assert(comp_mirror() != NULL, "must have a mirror"); 910 911 // Two-way link between the array klass and its component mirror: 912 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 913 set_component_mirror(mirror(), comp_mirror()); 914 // See below for ordering dependencies between field array_klass in component mirror 915 // and java_mirror in this klass. 916 } else { 917 assert(k->is_instance_klass(), "Must be"); 918 919 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 920 if (HAS_PENDING_EXCEPTION) { 921 // If any of the fields throws an exception like OOM remove the klass field 922 // from the mirror so GC doesn't follow it after the klass has been deallocated. 923 // This mirror looks like a primitive type, which logically it is because it 924 // it represents no class. 925 java_lang_Class::set_klass(mirror(), NULL); 926 return; 927 } 928 } 929 930 // set the classLoader field in the java_lang_Class instance 931 assert(oopDesc::equals(class_loader(), k->class_loader()), "should be same"); 932 set_class_loader(mirror(), class_loader()); 933 934 // Setup indirection from klass->mirror 935 // after any exceptions can happen during allocations. 936 k->set_java_mirror(mirror); 937 938 // Set the module field in the java_lang_Class instance. This must be done 939 // after the mirror is set. 940 set_mirror_module_field(k, mirror, module, THREAD); 941 942 if (comp_mirror() != NULL) { 943 // Set after k->java_mirror() is published, because compiled code running 944 // concurrently doesn't expect a k to have a null java_mirror. 945 release_set_array_klass(comp_mirror(), k); 946 } 947 } else { 948 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized"); 949 fixup_mirror_list()->push(k); 950 } 951 } 952 953 #if INCLUDE_CDS_JAVA_HEAP 954 // Clears mirror fields. Static final fields with initial values are reloaded 955 // from constant pool. The object identity hash is in the object header and is 956 // not affected. 957 class ResetMirrorField: public FieldClosure { 958 private: 959 Handle _m; 960 961 public: 962 ResetMirrorField(Handle mirror) : _m(mirror) {} 963 964 void do_field(fieldDescriptor* fd) { 965 assert(DumpSharedSpaces, "dump time only"); 966 assert(_m.not_null(), "Mirror cannot be NULL"); 967 968 if (fd->is_static() && fd->has_initial_value()) { 969 initialize_static_field(fd, _m, Thread::current()); 970 return; 971 } 972 973 BasicType ft = fd->field_type(); 974 switch (ft) { 975 case T_BYTE: 976 _m()->byte_field_put(fd->offset(), 0); 977 break; 978 case T_CHAR: 979 _m()->char_field_put(fd->offset(), 0); 980 break; 981 case T_DOUBLE: 982 _m()->double_field_put(fd->offset(), 0); 983 break; 984 case T_FLOAT: 985 _m()->float_field_put(fd->offset(), 0); 986 break; 987 case T_INT: 988 _m()->int_field_put(fd->offset(), 0); 989 break; 990 case T_LONG: 991 _m()->long_field_put(fd->offset(), 0); 992 break; 993 case T_SHORT: 994 _m()->short_field_put(fd->offset(), 0); 995 break; 996 case T_BOOLEAN: 997 _m()->bool_field_put(fd->offset(), false); 998 break; 999 case T_ARRAY: 1000 case T_OBJECT: { 1001 // It might be useful to cache the String field, but 1002 // for now just clear out any reference field 1003 oop o = _m()->obj_field(fd->offset()); 1004 _m()->obj_field_put(fd->offset(), NULL); 1005 break; 1006 } 1007 default: 1008 ShouldNotReachHere(); 1009 break; 1010 } 1011 } 1012 }; 1013 1014 void java_lang_Class::archive_basic_type_mirrors(TRAPS) { 1015 assert(HeapShared::is_heap_object_archiving_allowed(), 1016 "HeapShared::is_heap_object_archiving_allowed() must be true"); 1017 1018 for (int t = 0; t <= T_VOID; t++) { 1019 oop m = Universe::_mirrors[t]; 1020 if (m != NULL) { 1021 // Update the field at _array_klass_offset to point to the relocated array klass. 1022 oop archived_m = HeapShared::archive_heap_object(m, THREAD); 1023 assert(archived_m != NULL, "sanity"); 1024 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset)); 1025 assert(ak != NULL || t == T_VOID, "should not be NULL"); 1026 if (ak != NULL) { 1027 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak); 1028 archived_m->metadata_field_put(_array_klass_offset, reloc_ak); 1029 } 1030 1031 // Clear the fields. Just to be safe 1032 Klass *k = m->klass(); 1033 Handle archived_mirror_h(THREAD, archived_m); 1034 ResetMirrorField reset(archived_mirror_h); 1035 InstanceKlass::cast(k)->do_nonstatic_fields(&reset); 1036 1037 log_trace(cds, heap, mirror)( 1038 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1039 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m)); 1040 1041 Universe::_mirrors[t] = archived_m; 1042 } 1043 } 1044 1045 assert(Universe::_mirrors[T_INT] != NULL && 1046 Universe::_mirrors[T_FLOAT] != NULL && 1047 Universe::_mirrors[T_DOUBLE] != NULL && 1048 Universe::_mirrors[T_BYTE] != NULL && 1049 Universe::_mirrors[T_BOOLEAN] != NULL && 1050 Universe::_mirrors[T_CHAR] != NULL && 1051 Universe::_mirrors[T_LONG] != NULL && 1052 Universe::_mirrors[T_SHORT] != NULL && 1053 Universe::_mirrors[T_VOID] != NULL, "sanity"); 1054 1055 Universe::set_int_mirror(Universe::_mirrors[T_INT]); 1056 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]); 1057 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]); 1058 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]); 1059 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]); 1060 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]); 1061 Universe::set_long_mirror(Universe::_mirrors[T_LONG]); 1062 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]); 1063 Universe::set_void_mirror(Universe::_mirrors[T_VOID]); 1064 } 1065 1066 // 1067 // After the mirror object is successfully archived, the archived 1068 // klass is set with _has_archived_raw_mirror flag. 1069 // 1070 // The _has_archived_raw_mirror flag is cleared at runtime when the 1071 // archived mirror is restored. If archived java heap data cannot 1072 // be used at runtime, new mirror object is created for the shared 1073 // class. The _has_archived_raw_mirror is cleared also during the process. 1074 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) { 1075 assert(HeapShared::is_heap_object_archiving_allowed(), 1076 "HeapShared::is_heap_object_archiving_allowed() must be true"); 1077 1078 // Mirror is already archived 1079 if (k->has_raw_archived_mirror()) { 1080 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror"); 1081 return k->archived_java_mirror_raw(); 1082 } 1083 1084 // No mirror 1085 oop mirror = k->java_mirror(); 1086 if (mirror == NULL) { 1087 return NULL; 1088 } 1089 1090 if (k->is_instance_klass()) { 1091 InstanceKlass *ik = InstanceKlass::cast(k); 1092 assert(ik->signers() == NULL && !k->has_signer_and_not_archived(), 1093 "class with signer cannot be supported"); 1094 1095 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() || 1096 ik->is_shared_app_class())) { 1097 // Archiving mirror for classes from non-builtin loaders is not 1098 // supported. Clear the _java_mirror within the archived class. 1099 k->set_java_mirror_handle(NULL); 1100 return NULL; 1101 } 1102 } 1103 1104 // Now start archiving the mirror object 1105 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD); 1106 if (archived_mirror == NULL) { 1107 return NULL; 1108 } 1109 1110 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD); 1111 if (archived_mirror == NULL) { 1112 return NULL; 1113 } 1114 1115 k->set_archived_java_mirror_raw(archived_mirror); 1116 1117 k->set_has_raw_archived_mirror(); 1118 1119 ResourceMark rm; 1120 log_trace(cds, heap, mirror)( 1121 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1122 k->external_name(), p2i(mirror), p2i(archived_mirror)); 1123 1124 return archived_mirror; 1125 } 1126 1127 // The process is based on create_mirror(). 1128 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror, 1129 oop archived_mirror, 1130 Thread *THREAD) { 1131 // Clear nonstatic fields in archived mirror. Some of the fields will be set 1132 // to archived metadata and objects below. 1133 Klass *c = archived_mirror->klass(); 1134 Handle archived_mirror_h(THREAD, archived_mirror); 1135 ResetMirrorField reset(archived_mirror_h); 1136 InstanceKlass::cast(c)->do_nonstatic_fields(&reset); 1137 1138 if (k->is_array_klass()) { 1139 oop archived_comp_mirror; 1140 if (k->is_typeArray_klass()) { 1141 // The primitive type mirrors are already archived. Get the archived mirror. 1142 oop comp_mirror = java_lang_Class::component_mirror(mirror); 1143 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror); 1144 assert(archived_comp_mirror != NULL, "Must be"); 1145 } else { 1146 assert(k->is_objArray_klass(), "Must be"); 1147 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1148 assert(element_klass != NULL, "Must have an element klass"); 1149 archived_comp_mirror = archive_mirror(element_klass, THREAD); 1150 if (archived_comp_mirror == NULL) { 1151 return NULL; 1152 } 1153 } 1154 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror); 1155 } else { 1156 assert(k->is_instance_klass(), "Must be"); 1157 1158 // Reset local static fields in the mirror 1159 InstanceKlass::cast(k)->do_local_static_fields(&reset); 1160 1161 java_lang_Class:set_init_lock(archived_mirror, NULL); 1162 1163 set_protection_domain(archived_mirror, NULL); 1164 } 1165 1166 // clear class loader and mirror_module_field 1167 set_class_loader(archived_mirror, NULL); 1168 set_module(archived_mirror, NULL); 1169 1170 // The archived mirror's field at _klass_offset is still pointing to the original 1171 // klass. Updated the field in the archived mirror to point to the relocated 1172 // klass in the archive. 1173 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror)); 1174 log_debug(cds, heap, mirror)( 1175 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1176 p2i(as_Klass(mirror)), p2i(reloc_k)); 1177 archived_mirror->metadata_field_put(_klass_offset, reloc_k); 1178 1179 // The field at _array_klass_offset is pointing to the original one dimension 1180 // higher array klass if exists. Relocate the pointer. 1181 Klass *arr = array_klass_acquire(mirror); 1182 if (arr != NULL) { 1183 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr); 1184 log_debug(cds, heap, mirror)( 1185 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1186 p2i(arr), p2i(reloc_arr)); 1187 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr); 1188 } 1189 return archived_mirror; 1190 } 1191 1192 // Returns true if the mirror is updated, false if no archived mirror 1193 // data is present. After the archived mirror object is restored, the 1194 // shared klass' _has_raw_archived_mirror flag is cleared. 1195 bool java_lang_Class::restore_archived_mirror(Klass *k, 1196 Handle class_loader, Handle module, 1197 Handle protection_domain, TRAPS) { 1198 // Postpone restoring archived mirror until java.lang.Class is loaded. Please 1199 // see more details in SystemDictionary::resolve_preloaded_classes(). 1200 if (!SystemDictionary::Class_klass_loaded()) { 1201 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized"); 1202 fixup_mirror_list()->push(k); 1203 return true; 1204 } 1205 1206 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow()); 1207 1208 if (m == NULL) { 1209 return false; 1210 } 1211 1212 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m)); 1213 1214 // mirror is archived, restore 1215 assert(HeapShared::is_archived_object(m), "must be archived mirror object"); 1216 Handle mirror(THREAD, m); 1217 1218 if (!k->is_array_klass()) { 1219 // - local static final fields with initial values were initialized at dump time 1220 1221 // create the init_lock 1222 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false)); 1223 set_init_lock(mirror(), r); 1224 1225 if (protection_domain.not_null()) { 1226 set_protection_domain(mirror(), protection_domain()); 1227 } 1228 } 1229 1230 assert(class_loader() == k->class_loader(), "should be same"); 1231 if (class_loader.not_null()) { 1232 set_class_loader(mirror(), class_loader()); 1233 } 1234 1235 k->set_java_mirror(mirror); 1236 k->clear_has_raw_archived_mirror(); 1237 1238 set_mirror_module_field(k, mirror, module, THREAD); 1239 1240 ResourceMark rm; 1241 log_trace(cds, heap, mirror)( 1242 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1243 1244 return true; 1245 } 1246 #endif // INCLUDE_CDS_JAVA_HEAP 1247 1248 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1249 assert(_module_offset != 0, "must have been computed already"); 1250 java_lang_Class::set_module(k->java_mirror(), module()); 1251 } 1252 1253 int java_lang_Class::oop_size(oop java_class) { 1254 assert(_oop_size_offset != 0, "must be set"); 1255 int size = java_class->int_field(_oop_size_offset); 1256 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1257 return size; 1258 } 1259 1260 int java_lang_Class::oop_size_raw(oop java_class) { 1261 assert(_oop_size_offset != 0, "must be set"); 1262 int size = java_class->int_field_raw(_oop_size_offset); 1263 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1264 return size; 1265 } 1266 1267 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) { 1268 assert(_oop_size_offset != 0, "must be set"); 1269 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1270 *(int*)(((char*)java_class) + _oop_size_offset) = size; 1271 } 1272 1273 int java_lang_Class::static_oop_field_count(oop java_class) { 1274 assert(_static_oop_field_count_offset != 0, "must be set"); 1275 return java_class->int_field(_static_oop_field_count_offset); 1276 } 1277 1278 int java_lang_Class::static_oop_field_count_raw(oop java_class) { 1279 assert(_static_oop_field_count_offset != 0, "must be set"); 1280 return java_class->int_field_raw(_static_oop_field_count_offset); 1281 } 1282 1283 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1284 assert(_static_oop_field_count_offset != 0, "must be set"); 1285 java_class->int_field_put(_static_oop_field_count_offset, size); 1286 } 1287 1288 oop java_lang_Class::protection_domain(oop java_class) { 1289 assert(_protection_domain_offset != 0, "must be set"); 1290 return java_class->obj_field(_protection_domain_offset); 1291 } 1292 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1293 assert(_protection_domain_offset != 0, "must be set"); 1294 java_class->obj_field_put(_protection_domain_offset, pd); 1295 } 1296 1297 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1298 assert(_component_mirror_offset != 0, "must be set"); 1299 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1300 } 1301 oop java_lang_Class::component_mirror(oop java_class) { 1302 assert(_component_mirror_offset != 0, "must be set"); 1303 return java_class->obj_field(_component_mirror_offset); 1304 } 1305 1306 oop java_lang_Class::init_lock(oop java_class) { 1307 assert(_init_lock_offset != 0, "must be set"); 1308 return java_class->obj_field(_init_lock_offset); 1309 } 1310 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 1311 assert(_init_lock_offset != 0, "must be set"); 1312 java_class->obj_field_put(_init_lock_offset, init_lock); 1313 } 1314 1315 objArrayOop java_lang_Class::signers(oop java_class) { 1316 assert(_signers_offset != 0, "must be set"); 1317 return (objArrayOop)java_class->obj_field(_signers_offset); 1318 } 1319 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 1320 assert(_signers_offset != 0, "must be set"); 1321 java_class->obj_field_put(_signers_offset, (oop)signers); 1322 } 1323 1324 1325 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1326 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 1327 if (_class_loader_offset != 0) { 1328 java_class->obj_field_put(_class_loader_offset, loader); 1329 } 1330 } 1331 1332 oop java_lang_Class::class_loader(oop java_class) { 1333 assert(_class_loader_offset != 0, "must be set"); 1334 return java_class->obj_field(_class_loader_offset); 1335 } 1336 1337 oop java_lang_Class::module(oop java_class) { 1338 assert(_module_offset != 0, "must be set"); 1339 return java_class->obj_field(_module_offset); 1340 } 1341 1342 void java_lang_Class::set_module(oop java_class, oop module) { 1343 assert(_module_offset != 0, "must be set"); 1344 java_class->obj_field_put(_module_offset, module); 1345 } 1346 1347 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1348 // This should be improved by adding a field at the Java level or by 1349 // introducing a new VM klass (see comment in ClassFileParser) 1350 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 1351 if (type != T_VOID) { 1352 Klass* aklass = Universe::typeArrayKlassObj(type); 1353 assert(aklass != NULL, "correct bootstrap"); 1354 release_set_array_klass(java_class, aklass); 1355 } 1356 #ifdef ASSERT 1357 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 1358 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1359 #endif 1360 return java_class; 1361 } 1362 1363 1364 Klass* java_lang_Class::as_Klass(oop java_class) { 1365 //%note memory_2 1366 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1367 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 1368 assert(k == NULL || k->is_klass(), "type check"); 1369 return k; 1370 } 1371 1372 Klass* java_lang_Class::as_Klass_raw(oop java_class) { 1373 //%note memory_2 1374 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1375 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset)); 1376 assert(k == NULL || k->is_klass(), "type check"); 1377 return k; 1378 } 1379 1380 1381 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1382 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1383 java_class->metadata_field_put(_klass_offset, klass); 1384 } 1385 1386 1387 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1388 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1389 Symbol* name = NULL; 1390 bool is_instance = false; 1391 if (is_primitive(java_class)) { 1392 name = vmSymbols::type_signature(primitive_type(java_class)); 1393 } else { 1394 Klass* k = as_Klass(java_class); 1395 is_instance = k->is_instance_klass(); 1396 name = k->name(); 1397 } 1398 if (name == NULL) { 1399 st->print("<null>"); 1400 return; 1401 } 1402 if (is_instance) st->print("L"); 1403 st->write((char*) name->base(), (int) name->utf8_length()); 1404 if (is_instance) st->print(";"); 1405 } 1406 1407 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 1408 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1409 Symbol* name; 1410 if (is_primitive(java_class)) { 1411 name = vmSymbols::type_signature(primitive_type(java_class)); 1412 // Because this can create a new symbol, the caller has to decrement 1413 // the refcount, so make adjustment here and below for symbols returned 1414 // that are not created or incremented due to a successful lookup. 1415 name->increment_refcount(); 1416 } else { 1417 Klass* k = as_Klass(java_class); 1418 if (!k->is_instance_klass()) { 1419 name = k->name(); 1420 name->increment_refcount(); 1421 } else { 1422 ResourceMark rm; 1423 const char* sigstr = k->signature_name(); 1424 int siglen = (int) strlen(sigstr); 1425 if (!intern_if_not_found) { 1426 name = SymbolTable::probe(sigstr, siglen); 1427 } else { 1428 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 1429 } 1430 } 1431 } 1432 return name; 1433 } 1434 1435 // Returns the Java name for this Java mirror (Resource allocated) 1436 // See Klass::external_name(). 1437 // For primitive type Java mirrors, its type name is returned. 1438 const char* java_lang_Class::as_external_name(oop java_class) { 1439 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1440 const char* name = NULL; 1441 if (is_primitive(java_class)) { 1442 name = type2name(primitive_type(java_class)); 1443 } else { 1444 name = as_Klass(java_class)->external_name(); 1445 } 1446 if (name == NULL) { 1447 name = "<null>"; 1448 } 1449 return name; 1450 } 1451 1452 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1453 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1454 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass"); 1455 return k; 1456 } 1457 1458 1459 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1460 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1461 java_class->release_metadata_field_put(_array_klass_offset, klass); 1462 } 1463 1464 1465 bool java_lang_Class::is_primitive(oop java_class) { 1466 // should assert: 1467 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1468 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL); 1469 1470 #ifdef ASSERT 1471 if (is_primitive) { 1472 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1473 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()), 1474 "Should be either the T_VOID primitive or a java primitive"); 1475 } 1476 #endif 1477 1478 return is_primitive; 1479 } 1480 1481 1482 BasicType java_lang_Class::primitive_type(oop java_class) { 1483 assert(java_lang_Class::is_primitive(java_class), "just checking"); 1484 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1485 BasicType type = T_VOID; 1486 if (ak != NULL) { 1487 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1488 type = ArrayKlass::cast(ak)->element_type(); 1489 } else { 1490 assert(oopDesc::equals(java_class, Universe::void_mirror()), "only valid non-array primitive"); 1491 } 1492 assert(oopDesc::equals(Universe::java_mirror(type), java_class), "must be consistent"); 1493 return type; 1494 } 1495 1496 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1497 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1498 if (is_primitive(java_class)) { 1499 if (reference_klass != NULL) 1500 (*reference_klass) = NULL; 1501 return primitive_type(java_class); 1502 } else { 1503 if (reference_klass != NULL) 1504 (*reference_klass) = as_Klass(java_class); 1505 return T_OBJECT; 1506 } 1507 } 1508 1509 1510 oop java_lang_Class::primitive_mirror(BasicType t) { 1511 oop mirror = Universe::java_mirror(t); 1512 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 1513 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 1514 return mirror; 1515 } 1516 1517 bool java_lang_Class::offsets_computed = false; 1518 int java_lang_Class::classRedefinedCount_offset = -1; 1519 1520 #define CLASS_FIELDS_DO(macro) \ 1521 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \ 1522 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1523 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1524 macro(_module_offset, k, "module", module_signature, false) 1525 1526 void java_lang_Class::compute_offsets() { 1527 if (offsets_computed) { 1528 return; 1529 } 1530 1531 offsets_computed = true; 1532 1533 InstanceKlass* k = SystemDictionary::Class_klass(); 1534 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1535 1536 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 1537 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 1538 // GC treats them the same. 1539 _init_lock_offset = _component_mirror_offset; 1540 1541 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1542 } 1543 1544 #if INCLUDE_CDS 1545 void java_lang_Class::serialize_offsets(SerializeClosure* f) { 1546 f->do_u4((u4*)&offsets_computed); 1547 f->do_u4((u4*)&_init_lock_offset); 1548 1549 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1550 1551 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1552 } 1553 #endif 1554 1555 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1556 if (classRedefinedCount_offset == -1) { 1557 // If we don't have an offset for it then just return -1 as a marker. 1558 return -1; 1559 } 1560 1561 return the_class_mirror->int_field(classRedefinedCount_offset); 1562 } 1563 1564 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1565 if (classRedefinedCount_offset == -1) { 1566 // If we don't have an offset for it then nothing to set. 1567 return; 1568 } 1569 1570 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 1571 } 1572 1573 1574 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1575 // platform thread structure, and a eetop offset which was used for thread 1576 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1577 // merged, so in the HotSpot VM we just use the eetop field for the thread 1578 // instead of the privateInfo_offset. 1579 // 1580 // Note: The stackSize field is only present starting in 1.4. 1581 1582 int java_lang_Thread::_name_offset = 0; 1583 int java_lang_Thread::_group_offset = 0; 1584 int java_lang_Thread::_contextClassLoader_offset = 0; 1585 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 1586 int java_lang_Thread::_priority_offset = 0; 1587 int java_lang_Thread::_eetop_offset = 0; 1588 int java_lang_Thread::_daemon_offset = 0; 1589 int java_lang_Thread::_stillborn_offset = 0; 1590 int java_lang_Thread::_stackSize_offset = 0; 1591 int java_lang_Thread::_tid_offset = 0; 1592 int java_lang_Thread::_thread_status_offset = 0; 1593 int java_lang_Thread::_park_blocker_offset = 0; 1594 int java_lang_Thread::_park_event_offset = 0 ; 1595 1596 #define THREAD_FIELDS_DO(macro) \ 1597 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1598 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1599 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \ 1600 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \ 1601 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1602 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1603 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1604 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \ 1605 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1606 macro(_tid_offset, k, "tid", long_signature, false); \ 1607 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \ 1608 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \ 1609 macro(_park_event_offset, k, "nativeParkEventPointer", long_signature, false) 1610 1611 void java_lang_Thread::compute_offsets() { 1612 assert(_group_offset == 0, "offsets should be initialized only once"); 1613 1614 InstanceKlass* k = SystemDictionary::Thread_klass(); 1615 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1616 } 1617 1618 #if INCLUDE_CDS 1619 void java_lang_Thread::serialize_offsets(SerializeClosure* f) { 1620 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1621 } 1622 #endif 1623 1624 JavaThread* java_lang_Thread::thread(oop java_thread) { 1625 return (JavaThread*)java_thread->address_field(_eetop_offset); 1626 } 1627 1628 1629 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1630 java_thread->address_field_put(_eetop_offset, (address)thread); 1631 } 1632 1633 1634 oop java_lang_Thread::name(oop java_thread) { 1635 return java_thread->obj_field(_name_offset); 1636 } 1637 1638 1639 void java_lang_Thread::set_name(oop java_thread, oop name) { 1640 java_thread->obj_field_put(_name_offset, name); 1641 } 1642 1643 1644 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1645 return (ThreadPriority)java_thread->int_field(_priority_offset); 1646 } 1647 1648 1649 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1650 java_thread->int_field_put(_priority_offset, priority); 1651 } 1652 1653 1654 oop java_lang_Thread::threadGroup(oop java_thread) { 1655 return java_thread->obj_field(_group_offset); 1656 } 1657 1658 1659 bool java_lang_Thread::is_stillborn(oop java_thread) { 1660 return java_thread->bool_field(_stillborn_offset) != 0; 1661 } 1662 1663 1664 // We never have reason to turn the stillborn bit off 1665 void java_lang_Thread::set_stillborn(oop java_thread) { 1666 java_thread->bool_field_put(_stillborn_offset, true); 1667 } 1668 1669 1670 bool java_lang_Thread::is_alive(oop java_thread) { 1671 JavaThread* thr = java_lang_Thread::thread(java_thread); 1672 return (thr != NULL); 1673 } 1674 1675 1676 bool java_lang_Thread::is_daemon(oop java_thread) { 1677 return java_thread->bool_field(_daemon_offset) != 0; 1678 } 1679 1680 1681 void java_lang_Thread::set_daemon(oop java_thread) { 1682 java_thread->bool_field_put(_daemon_offset, true); 1683 } 1684 1685 oop java_lang_Thread::context_class_loader(oop java_thread) { 1686 return java_thread->obj_field(_contextClassLoader_offset); 1687 } 1688 1689 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1690 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1691 } 1692 1693 1694 jlong java_lang_Thread::stackSize(oop java_thread) { 1695 if (_stackSize_offset > 0) { 1696 return java_thread->long_field(_stackSize_offset); 1697 } else { 1698 return 0; 1699 } 1700 } 1701 1702 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1703 void java_lang_Thread::set_thread_status(oop java_thread, 1704 java_lang_Thread::ThreadStatus status) { 1705 // The threadStatus is only present starting in 1.5 1706 if (_thread_status_offset > 0) { 1707 java_thread->int_field_put(_thread_status_offset, status); 1708 } 1709 } 1710 1711 // Read thread status value from threadStatus field in java.lang.Thread java class. 1712 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1713 // Make sure the caller is operating on behalf of the VM or is 1714 // running VM code (state == _thread_in_vm). 1715 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1716 JavaThread::current()->thread_state() == _thread_in_vm, 1717 "Java Thread is not running in vm"); 1718 // The threadStatus is only present starting in 1.5 1719 if (_thread_status_offset > 0) { 1720 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1721 } else { 1722 // All we can easily figure out is if it is alive, but that is 1723 // enough info for a valid unknown status. 1724 // These aren't restricted to valid set ThreadStatus values, so 1725 // use JVMTI values and cast. 1726 JavaThread* thr = java_lang_Thread::thread(java_thread); 1727 if (thr == NULL) { 1728 // the thread hasn't run yet or is in the process of exiting 1729 return NEW; 1730 } 1731 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1732 } 1733 } 1734 1735 1736 jlong java_lang_Thread::thread_id(oop java_thread) { 1737 // The thread ID field is only present starting in 1.5 1738 if (_tid_offset > 0) { 1739 return java_thread->long_field(_tid_offset); 1740 } else { 1741 return 0; 1742 } 1743 } 1744 1745 oop java_lang_Thread::park_blocker(oop java_thread) { 1746 assert(JDK_Version::current().supports_thread_park_blocker() && 1747 _park_blocker_offset != 0, "Must support parkBlocker field"); 1748 1749 if (_park_blocker_offset > 0) { 1750 return java_thread->obj_field(_park_blocker_offset); 1751 } 1752 1753 return NULL; 1754 } 1755 1756 jlong java_lang_Thread::park_event(oop java_thread) { 1757 if (_park_event_offset > 0) { 1758 return java_thread->long_field(_park_event_offset); 1759 } 1760 return 0; 1761 } 1762 1763 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1764 if (_park_event_offset > 0) { 1765 java_thread->long_field_put(_park_event_offset, ptr); 1766 return true; 1767 } 1768 return false; 1769 } 1770 1771 1772 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1773 assert(_thread_status_offset != 0, "Must have thread status"); 1774 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1775 switch (status) { 1776 case NEW : return "NEW"; 1777 case RUNNABLE : return "RUNNABLE"; 1778 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1779 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1780 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1781 case PARKED : return "WAITING (parking)"; 1782 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1783 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1784 case TERMINATED : return "TERMINATED"; 1785 default : return "UNKNOWN"; 1786 }; 1787 } 1788 int java_lang_ThreadGroup::_parent_offset = 0; 1789 int java_lang_ThreadGroup::_name_offset = 0; 1790 int java_lang_ThreadGroup::_threads_offset = 0; 1791 int java_lang_ThreadGroup::_groups_offset = 0; 1792 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1793 int java_lang_ThreadGroup::_destroyed_offset = 0; 1794 int java_lang_ThreadGroup::_daemon_offset = 0; 1795 int java_lang_ThreadGroup::_nthreads_offset = 0; 1796 int java_lang_ThreadGroup::_ngroups_offset = 0; 1797 1798 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1799 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1800 return java_thread_group->obj_field(_parent_offset); 1801 } 1802 1803 // ("name as oop" accessor is not necessary) 1804 1805 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1806 oop name = java_thread_group->obj_field(_name_offset); 1807 // ThreadGroup.name can be null 1808 if (name != NULL) { 1809 return java_lang_String::as_utf8_string(name); 1810 } 1811 return NULL; 1812 } 1813 1814 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1815 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1816 return java_thread_group->int_field(_nthreads_offset); 1817 } 1818 1819 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1820 oop threads = java_thread_group->obj_field(_threads_offset); 1821 assert(threads != NULL, "threadgroups should have threads"); 1822 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1823 return objArrayOop(threads); 1824 } 1825 1826 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1827 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1828 return java_thread_group->int_field(_ngroups_offset); 1829 } 1830 1831 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1832 oop groups = java_thread_group->obj_field(_groups_offset); 1833 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1834 return objArrayOop(groups); 1835 } 1836 1837 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1838 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1839 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1840 } 1841 1842 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1843 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1844 return java_thread_group->bool_field(_destroyed_offset) != 0; 1845 } 1846 1847 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1848 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1849 return java_thread_group->bool_field(_daemon_offset) != 0; 1850 } 1851 1852 #define THREADGROUP_FIELDS_DO(macro) \ 1853 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \ 1854 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1855 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \ 1856 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \ 1857 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \ 1858 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \ 1859 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1860 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \ 1861 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false) 1862 1863 void java_lang_ThreadGroup::compute_offsets() { 1864 assert(_parent_offset == 0, "offsets should be initialized only once"); 1865 1866 InstanceKlass* k = SystemDictionary::ThreadGroup_klass(); 1867 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1868 } 1869 1870 #if INCLUDE_CDS 1871 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) { 1872 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1873 } 1874 #endif 1875 1876 #define THROWABLE_FIELDS_DO(macro) \ 1877 macro(backtrace_offset, k, "backtrace", object_signature, false); \ 1878 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \ 1879 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 1880 macro(depth_offset, k, "depth", int_signature, false); \ 1881 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 1882 1883 void java_lang_Throwable::compute_offsets() { 1884 InstanceKlass* k = SystemDictionary::Throwable_klass(); 1885 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1886 } 1887 1888 #if INCLUDE_CDS 1889 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) { 1890 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1891 } 1892 #endif 1893 1894 oop java_lang_Throwable::unassigned_stacktrace() { 1895 InstanceKlass* ik = SystemDictionary::Throwable_klass(); 1896 oop base = ik->static_field_base_raw(); 1897 return base->obj_field(static_unassigned_stacktrace_offset); 1898 } 1899 1900 oop java_lang_Throwable::backtrace(oop throwable) { 1901 return throwable->obj_field_acquire(backtrace_offset); 1902 } 1903 1904 1905 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1906 throwable->release_obj_field_put(backtrace_offset, value); 1907 } 1908 1909 int java_lang_Throwable::depth(oop throwable) { 1910 return throwable->int_field(depth_offset); 1911 } 1912 1913 void java_lang_Throwable::set_depth(oop throwable, int value) { 1914 throwable->int_field_put(depth_offset, value); 1915 } 1916 1917 oop java_lang_Throwable::message(oop throwable) { 1918 return throwable->obj_field(detailMessage_offset); 1919 } 1920 1921 1922 // Return Symbol for detailed_message or NULL 1923 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1924 PRESERVE_EXCEPTION_MARK; // Keep original exception 1925 oop detailed_message = java_lang_Throwable::message(throwable); 1926 if (detailed_message != NULL) { 1927 return java_lang_String::as_symbol(detailed_message, THREAD); 1928 } 1929 return NULL; 1930 } 1931 1932 void java_lang_Throwable::set_message(oop throwable, oop value) { 1933 throwable->obj_field_put(detailMessage_offset, value); 1934 } 1935 1936 1937 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1938 throwable->obj_field_put(stackTrace_offset, st_element_array); 1939 } 1940 1941 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1942 set_stacktrace(throwable, NULL); 1943 } 1944 1945 1946 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1947 ResourceMark rm; 1948 Klass* k = throwable->klass(); 1949 assert(k != NULL, "just checking"); 1950 st->print("%s", k->external_name()); 1951 oop msg = message(throwable); 1952 if (msg != NULL) { 1953 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1954 } 1955 } 1956 1957 // After this many redefines, the stack trace is unreliable. 1958 const int MAX_VERSION = USHRT_MAX; 1959 1960 static inline bool version_matches(Method* method, int version) { 1961 assert(version < MAX_VERSION, "version is too big"); 1962 return method != NULL && (method->constants()->version() == version); 1963 } 1964 1965 1966 // This class provides a simple wrapper over the internal structure of 1967 // exception backtrace to insulate users of the backtrace from needing 1968 // to know what it looks like. 1969 class BacktraceBuilder: public StackObj { 1970 friend class BacktraceIterator; 1971 private: 1972 Handle _backtrace; 1973 objArrayOop _head; 1974 typeArrayOop _methods; 1975 typeArrayOop _bcis; 1976 objArrayOop _mirrors; 1977 typeArrayOop _names; // needed to insulate method name against redefinition 1978 int _index; 1979 NoSafepointVerifier _nsv; 1980 1981 enum { 1982 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1983 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1984 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1985 trace_names_offset = java_lang_Throwable::trace_names_offset, 1986 trace_next_offset = java_lang_Throwable::trace_next_offset, 1987 trace_size = java_lang_Throwable::trace_size, 1988 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1989 }; 1990 1991 // get info out of chunks 1992 static typeArrayOop get_methods(objArrayHandle chunk) { 1993 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1994 assert(methods != NULL, "method array should be initialized in backtrace"); 1995 return methods; 1996 } 1997 static typeArrayOop get_bcis(objArrayHandle chunk) { 1998 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1999 assert(bcis != NULL, "bci array should be initialized in backtrace"); 2000 return bcis; 2001 } 2002 static objArrayOop get_mirrors(objArrayHandle chunk) { 2003 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 2004 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 2005 return mirrors; 2006 } 2007 static typeArrayOop get_names(objArrayHandle chunk) { 2008 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 2009 assert(names != NULL, "names array should be initialized in backtrace"); 2010 return names; 2011 } 2012 2013 public: 2014 2015 // constructor for new backtrace 2016 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL) { 2017 expand(CHECK); 2018 _backtrace = Handle(THREAD, _head); 2019 _index = 0; 2020 } 2021 2022 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 2023 _methods = get_methods(backtrace); 2024 _bcis = get_bcis(backtrace); 2025 _mirrors = get_mirrors(backtrace); 2026 _names = get_names(backtrace); 2027 assert(_methods->length() == _bcis->length() && 2028 _methods->length() == _mirrors->length() && 2029 _mirrors->length() == _names->length(), 2030 "method and source information arrays should match"); 2031 2032 // head is the preallocated backtrace 2033 _head = backtrace(); 2034 _backtrace = Handle(thread, _head); 2035 _index = 0; 2036 } 2037 2038 void expand(TRAPS) { 2039 objArrayHandle old_head(THREAD, _head); 2040 PauseNoSafepointVerifier pnsv(&_nsv); 2041 2042 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2043 objArrayHandle new_head(THREAD, head); 2044 2045 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2046 typeArrayHandle new_methods(THREAD, methods); 2047 2048 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2049 typeArrayHandle new_bcis(THREAD, bcis); 2050 2051 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2052 objArrayHandle new_mirrors(THREAD, mirrors); 2053 2054 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2055 typeArrayHandle new_names(THREAD, names); 2056 2057 if (!old_head.is_null()) { 2058 old_head->obj_at_put(trace_next_offset, new_head()); 2059 } 2060 new_head->obj_at_put(trace_methods_offset, new_methods()); 2061 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2062 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2063 new_head->obj_at_put(trace_names_offset, new_names()); 2064 2065 _head = new_head(); 2066 _methods = new_methods(); 2067 _bcis = new_bcis(); 2068 _mirrors = new_mirrors(); 2069 _names = new_names(); 2070 _index = 0; 2071 } 2072 2073 oop backtrace() { 2074 return _backtrace(); 2075 } 2076 2077 inline void push(Method* method, int bci, TRAPS) { 2078 // Smear the -1 bci to 0 since the array only holds unsigned 2079 // shorts. The later line number lookup would just smear the -1 2080 // to a 0 even if it could be recorded. 2081 if (bci == SynchronizationEntryBCI) bci = 0; 2082 2083 if (_index >= trace_chunk_size) { 2084 methodHandle mhandle(THREAD, method); 2085 expand(CHECK); 2086 method = mhandle(); 2087 } 2088 2089 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2090 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2091 2092 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2093 // klass owning the symbols alive so their refcounts aren't decremented. 2094 Symbol* name = method->name(); 2095 _names->symbol_at_put(_index, name); 2096 2097 // We need to save the mirrors in the backtrace to keep the class 2098 // from being unloaded while we still have this stack trace. 2099 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 2100 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2101 _index++; 2102 } 2103 2104 }; 2105 2106 struct BacktraceElement : public StackObj { 2107 int _method_id; 2108 int _bci; 2109 int _version; 2110 Symbol* _name; 2111 Handle _mirror; 2112 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2113 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {} 2114 }; 2115 2116 class BacktraceIterator : public StackObj { 2117 int _index; 2118 objArrayHandle _result; 2119 objArrayHandle _mirrors; 2120 typeArrayHandle _methods; 2121 typeArrayHandle _bcis; 2122 typeArrayHandle _names; 2123 2124 void init(objArrayHandle result, Thread* thread) { 2125 // Get method id, bci, version and mirror from chunk 2126 _result = result; 2127 if (_result.not_null()) { 2128 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2129 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2130 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2131 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2132 _index = 0; 2133 } 2134 } 2135 public: 2136 BacktraceIterator(objArrayHandle result, Thread* thread) { 2137 init(result, thread); 2138 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2139 } 2140 2141 BacktraceElement next(Thread* thread) { 2142 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2143 _methods->ushort_at(_index), 2144 Backtrace::version_at(_bcis->int_at(_index)), 2145 Backtrace::bci_at(_bcis->int_at(_index)), 2146 _names->symbol_at(_index)); 2147 _index++; 2148 2149 if (_index >= java_lang_Throwable::trace_chunk_size) { 2150 int next_offset = java_lang_Throwable::trace_next_offset; 2151 // Get next chunk 2152 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2153 init(result, thread); 2154 } 2155 return e; 2156 } 2157 2158 bool repeat() { 2159 return _result.not_null() && _mirrors->obj_at(_index) != NULL; 2160 } 2161 }; 2162 2163 2164 // Print stack trace element to resource allocated buffer 2165 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 2166 int version, int bci, Symbol* name) { 2167 ResourceMark rm; 2168 2169 // Get strings and string lengths 2170 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2171 const char* klass_name = holder->external_name(); 2172 int buf_len = (int)strlen(klass_name); 2173 2174 char* method_name = name->as_C_string(); 2175 buf_len += (int)strlen(method_name); 2176 2177 char* source_file_name = NULL; 2178 Symbol* source = Backtrace::get_source_file_name(holder, version); 2179 if (source != NULL) { 2180 source_file_name = source->as_C_string(); 2181 buf_len += (int)strlen(source_file_name); 2182 } 2183 2184 char *module_name = NULL, *module_version = NULL; 2185 ModuleEntry* module = holder->module(); 2186 if (module->is_named()) { 2187 module_name = module->name()->as_C_string(); 2188 buf_len += (int)strlen(module_name); 2189 if (module->version() != NULL) { 2190 module_version = module->version()->as_C_string(); 2191 buf_len += (int)strlen(module_version); 2192 } 2193 } 2194 2195 // Allocate temporary buffer with extra space for formatting and line number 2196 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 2197 2198 // Print stack trace line in buffer 2199 sprintf(buf, "\tat %s.%s(", klass_name, method_name); 2200 2201 // Print module information 2202 if (module_name != NULL) { 2203 if (module_version != NULL) { 2204 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version); 2205 } else { 2206 sprintf(buf + (int)strlen(buf), "%s/", module_name); 2207 } 2208 } 2209 2210 // The method can be NULL if the requested class version is gone 2211 Method* method = holder->method_with_orig_idnum(method_id, version); 2212 if (!version_matches(method, version)) { 2213 strcat(buf, "Redefined)"); 2214 } else { 2215 int line_number = Backtrace::get_line_number(method, bci); 2216 if (line_number == -2) { 2217 strcat(buf, "Native Method)"); 2218 } else { 2219 if (source_file_name != NULL && (line_number != -1)) { 2220 // Sourcename and linenumber 2221 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number); 2222 } else if (source_file_name != NULL) { 2223 // Just sourcename 2224 sprintf(buf + (int)strlen(buf), "%s)", source_file_name); 2225 } else { 2226 // Neither sourcename nor linenumber 2227 sprintf(buf + (int)strlen(buf), "Unknown Source)"); 2228 } 2229 CompiledMethod* nm = method->code(); 2230 if (WizardMode && nm != NULL) { 2231 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 2232 } 2233 } 2234 } 2235 2236 st->print_cr("%s", buf); 2237 } 2238 2239 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) { 2240 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 2241 int method_id = method->orig_method_idnum(); 2242 int version = method->constants()->version(); 2243 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 2244 } 2245 2246 /** 2247 * Print the throwable message and its stack trace plus all causes by walking the 2248 * cause chain. The output looks the same as of Throwable.printStackTrace(). 2249 */ 2250 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 2251 // First, print the message. 2252 print(throwable(), st); 2253 st->cr(); 2254 2255 // Now print the stack trace. 2256 Thread* THREAD = Thread::current(); 2257 while (throwable.not_null()) { 2258 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 2259 if (result.is_null()) { 2260 st->print_raw_cr("\t<<no stack trace available>>"); 2261 return; 2262 } 2263 BacktraceIterator iter(result, THREAD); 2264 2265 while (iter.repeat()) { 2266 BacktraceElement bte = iter.next(THREAD); 2267 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 2268 } 2269 { 2270 // Call getCause() which doesn't necessarily return the _cause field. 2271 EXCEPTION_MARK; 2272 JavaValue cause(T_OBJECT); 2273 JavaCalls::call_virtual(&cause, 2274 throwable, 2275 throwable->klass(), 2276 vmSymbols::getCause_name(), 2277 vmSymbols::void_throwable_signature(), 2278 THREAD); 2279 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 2280 if (HAS_PENDING_EXCEPTION) { 2281 CLEAR_PENDING_EXCEPTION; 2282 throwable = Handle(); 2283 } else { 2284 throwable = Handle(THREAD, (oop) cause.get_jobject()); 2285 if (throwable.not_null()) { 2286 st->print("Caused by: "); 2287 print(throwable(), st); 2288 st->cr(); 2289 } 2290 } 2291 } 2292 } 2293 } 2294 2295 /** 2296 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 2297 */ 2298 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 2299 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected"); 2300 JavaValue result(T_VOID); 2301 JavaCalls::call_virtual(&result, 2302 throwable, 2303 SystemDictionary::Throwable_klass(), 2304 vmSymbols::printStackTrace_name(), 2305 vmSymbols::void_method_signature(), 2306 THREAD); 2307 } 2308 2309 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 2310 if (!StackTraceInThrowable) return; 2311 ResourceMark rm(THREAD); 2312 2313 // Start out by clearing the backtrace for this object, in case the VM 2314 // runs out of memory while allocating the stack trace 2315 set_backtrace(throwable(), NULL); 2316 // Clear lazily constructed Java level stacktrace if refilling occurs 2317 // This is unnecessary in 1.7+ but harmless 2318 clear_stacktrace(throwable()); 2319 2320 int max_depth = MaxJavaStackTraceDepth; 2321 JavaThread* thread = (JavaThread*)THREAD; 2322 2323 BacktraceBuilder bt(CHECK); 2324 2325 // If there is no Java frame just return the method that was being called 2326 // with bci 0 2327 if (!thread->has_last_Java_frame()) { 2328 if (max_depth >= 1 && method() != NULL) { 2329 bt.push(method(), 0, CHECK); 2330 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 2331 set_depth(throwable(), 1); 2332 set_backtrace(throwable(), bt.backtrace()); 2333 } 2334 return; 2335 } 2336 2337 // Instead of using vframe directly, this version of fill_in_stack_trace 2338 // basically handles everything by hand. This significantly improved the 2339 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 2340 // See bug 6333838 for more details. 2341 // The "ASSERT" here is to verify this method generates the exactly same stack 2342 // trace as utilizing vframe. 2343 #ifdef ASSERT 2344 vframeStream st(thread); 2345 methodHandle st_method(THREAD, st.method()); 2346 #endif 2347 int total_count = 0; 2348 RegisterMap map(thread, false); 2349 int decode_offset = 0; 2350 CompiledMethod* nm = NULL; 2351 bool skip_fillInStackTrace_check = false; 2352 bool skip_throwableInit_check = false; 2353 bool skip_hidden = !ShowHiddenFrames; 2354 2355 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 2356 Method* method = NULL; 2357 int bci = 0; 2358 2359 // Compiled java method case. 2360 if (decode_offset != 0) { 2361 DebugInfoReadStream stream(nm, decode_offset); 2362 decode_offset = stream.read_int(); 2363 method = (Method*)nm->metadata_at(stream.read_int()); 2364 bci = stream.read_bci(); 2365 } else { 2366 if (fr.is_first_frame()) break; 2367 address pc = fr.pc(); 2368 if (fr.is_interpreted_frame()) { 2369 address bcp = fr.interpreter_frame_bcp(); 2370 method = fr.interpreter_frame_method(); 2371 bci = method->bci_from(bcp); 2372 fr = fr.sender(&map); 2373 } else { 2374 CodeBlob* cb = fr.cb(); 2375 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 2376 // but non nmethod 2377 fr = fr.sender(&map); 2378 if (cb == NULL || !cb->is_compiled()) { 2379 continue; 2380 } 2381 nm = cb->as_compiled_method(); 2382 if (nm->method()->is_native()) { 2383 method = nm->method(); 2384 bci = 0; 2385 } else { 2386 PcDesc* pd = nm->pc_desc_at(pc); 2387 decode_offset = pd->scope_decode_offset(); 2388 // if decode_offset is not equal to 0, it will execute the 2389 // "compiled java method case" at the beginning of the loop. 2390 continue; 2391 } 2392 } 2393 } 2394 #ifdef ASSERT 2395 assert(st_method() == method && st.bci() == bci, 2396 "Wrong stack trace"); 2397 st.next(); 2398 // vframeStream::method isn't GC-safe so store off a copy 2399 // of the Method* in case we GC. 2400 if (!st.at_end()) { 2401 st_method = st.method(); 2402 } 2403 #endif 2404 2405 // the format of the stacktrace will be: 2406 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2407 // - 0 or more <init> methods for the exception class (skipped) 2408 // - rest of the stack 2409 2410 if (!skip_fillInStackTrace_check) { 2411 if (method->name() == vmSymbols::fillInStackTrace_name() && 2412 throwable->is_a(method->method_holder())) { 2413 continue; 2414 } 2415 else { 2416 skip_fillInStackTrace_check = true; // gone past them all 2417 } 2418 } 2419 if (!skip_throwableInit_check) { 2420 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2421 2422 // skip <init> methods of the exception class and superclasses 2423 // This is simlar to classic VM. 2424 if (method->name() == vmSymbols::object_initializer_name() && 2425 throwable->is_a(method->method_holder())) { 2426 continue; 2427 } else { 2428 // there are none or we've seen them all - either way stop checking 2429 skip_throwableInit_check = true; 2430 } 2431 } 2432 if (method->is_hidden()) { 2433 if (skip_hidden) continue; 2434 } 2435 bt.push(method, bci, CHECK); 2436 total_count++; 2437 } 2438 2439 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2440 2441 // Put completed stack trace into throwable object 2442 set_backtrace(throwable(), bt.backtrace()); 2443 set_depth(throwable(), total_count); 2444 } 2445 2446 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2447 // No-op if stack trace is disabled 2448 if (!StackTraceInThrowable) { 2449 return; 2450 } 2451 2452 // Disable stack traces for some preallocated out of memory errors 2453 if (!Universe::should_fill_in_stack_trace(throwable)) { 2454 return; 2455 } 2456 2457 PRESERVE_EXCEPTION_MARK; 2458 2459 JavaThread* thread = JavaThread::active(); 2460 fill_in_stack_trace(throwable, method, thread); 2461 // ignore exceptions thrown during stack trace filling 2462 CLEAR_PENDING_EXCEPTION; 2463 } 2464 2465 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2466 // Allocate stack trace - backtrace is created but not filled in 2467 2468 // No-op if stack trace is disabled 2469 if (!StackTraceInThrowable) return; 2470 BacktraceBuilder bt(CHECK); // creates a backtrace 2471 set_backtrace(throwable(), bt.backtrace()); 2472 } 2473 2474 2475 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2476 // Fill in stack trace into preallocated backtrace (no GC) 2477 2478 // No-op if stack trace is disabled 2479 if (!StackTraceInThrowable) return; 2480 2481 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 2482 2483 JavaThread* THREAD = JavaThread::current(); 2484 2485 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2486 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2487 2488 ResourceMark rm(THREAD); 2489 vframeStream st(THREAD); 2490 2491 BacktraceBuilder bt(THREAD, backtrace); 2492 2493 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2494 // methods as preallocated errors aren't created by "java" code. 2495 2496 // fill in as much stack trace as possible 2497 int chunk_count = 0; 2498 for (;!st.at_end(); st.next()) { 2499 bt.push(st.method(), st.bci(), CHECK); 2500 chunk_count++; 2501 2502 // Bail-out for deep stacks 2503 if (chunk_count >= trace_chunk_size) break; 2504 } 2505 set_depth(throwable(), chunk_count); 2506 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2507 2508 // We support the Throwable immutability protocol defined for Java 7. 2509 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2510 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 2511 } 2512 2513 void java_lang_Throwable::get_stack_trace_elements(Handle throwable, 2514 objArrayHandle stack_trace_array_h, TRAPS) { 2515 2516 if (throwable.is_null() || stack_trace_array_h.is_null()) { 2517 THROW(vmSymbols::java_lang_NullPointerException()); 2518 } 2519 2520 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2521 2522 if (stack_trace_array_h->length() != depth(throwable())) { 2523 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2524 } 2525 2526 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable()))); 2527 BacktraceIterator iter(result, THREAD); 2528 2529 int index = 0; 2530 while (iter.repeat()) { 2531 BacktraceElement bte = iter.next(THREAD); 2532 2533 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2534 2535 if (stack_trace_element.is_null()) { 2536 THROW(vmSymbols::java_lang_NullPointerException()); 2537 } 2538 2539 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2540 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2541 2542 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2543 method, 2544 bte._version, 2545 bte._bci, 2546 bte._name, CHECK); 2547 } 2548 } 2549 2550 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2551 // Allocate java.lang.StackTraceElement instance 2552 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 2553 assert(k != NULL, "must be loaded in 1.4+"); 2554 if (k->should_be_initialized()) { 2555 k->initialize(CHECK_0); 2556 } 2557 2558 Handle element = k->allocate_instance_handle(CHECK_0); 2559 2560 int version = method->constants()->version(); 2561 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0); 2562 return element(); 2563 } 2564 2565 void java_lang_StackTraceElement::fill_in(Handle element, 2566 InstanceKlass* holder, const methodHandle& method, 2567 int version, int bci, Symbol* name, TRAPS) { 2568 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check"); 2569 2570 // Fill in class name 2571 ResourceMark rm(THREAD); 2572 const char* str = holder->external_name(); 2573 oop classname = StringTable::intern(str, CHECK); 2574 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2575 java_lang_StackTraceElement::set_declaringClassObject(element(), holder->java_mirror()); 2576 2577 oop loader = holder->class_loader(); 2578 if (loader != NULL) { 2579 oop loader_name = java_lang_ClassLoader::name(loader); 2580 if (loader_name != NULL) 2581 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2582 } 2583 2584 // Fill in method name 2585 oop methodname = StringTable::intern(name, CHECK); 2586 java_lang_StackTraceElement::set_methodName(element(), methodname); 2587 2588 // Fill in module name and version 2589 ModuleEntry* module = holder->module(); 2590 if (module->is_named()) { 2591 oop module_name = StringTable::intern(module->name(), CHECK); 2592 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2593 oop module_version; 2594 if (module->version() != NULL) { 2595 module_version = StringTable::intern(module->version(), CHECK); 2596 } else { 2597 module_version = NULL; 2598 } 2599 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2600 } 2601 2602 if (method() == NULL || !version_matches(method(), version)) { 2603 // The method was redefined, accurate line number information isn't available 2604 java_lang_StackTraceElement::set_fileName(element(), NULL); 2605 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2606 } else { 2607 // Fill in source file name and line number. 2608 Symbol* source = Backtrace::get_source_file_name(holder, version); 2609 if (ShowHiddenFrames && source == NULL) 2610 source = vmSymbols::unknown_class_name(); 2611 oop filename = StringTable::intern(source, CHECK); 2612 java_lang_StackTraceElement::set_fileName(element(), filename); 2613 2614 int line_number = Backtrace::get_line_number(method, bci); 2615 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2616 } 2617 } 2618 2619 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 2620 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 2621 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 2622 // we should expand MemberName::name when Throwable uses StackTrace 2623 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 2624 return method; 2625 } 2626 2627 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) { 2628 // set Method* or mid/cpref 2629 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset)); 2630 InstanceKlass* ik = method->method_holder(); 2631 CallInfo info(method(), ik, CHECK); 2632 MethodHandles::init_method_MemberName(mname, info); 2633 // set bci 2634 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 2635 // method may be redefined; store the version 2636 int version = method->constants()->version(); 2637 assert((jushort)version == version, "version should be short"); 2638 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 2639 } 2640 2641 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 2642 ResourceMark rm(THREAD); 2643 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset)); 2644 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname())); 2645 InstanceKlass* holder = InstanceKlass::cast(clazz); 2646 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 2647 2648 short version = stackFrame->short_field(_version_offset); 2649 short bci = stackFrame->short_field(_bci_offset); 2650 Symbol* name = method->name(); 2651 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK); 2652 } 2653 2654 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 2655 macro(_memberName_offset, k, "memberName", object_signature, false); \ 2656 macro(_bci_offset, k, "bci", short_signature, false) 2657 2658 void java_lang_StackFrameInfo::compute_offsets() { 2659 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass(); 2660 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2661 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2662 } 2663 2664 #if INCLUDE_CDS 2665 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) { 2666 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2667 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 2668 } 2669 #endif 2670 2671 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 2672 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 2673 macro(_locals_offset, k, "locals", object_array_signature, false); \ 2674 macro(_operands_offset, k, "operands", object_array_signature, false); \ 2675 macro(_mode_offset, k, "mode", int_signature, false) 2676 2677 void java_lang_LiveStackFrameInfo::compute_offsets() { 2678 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass(); 2679 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2680 } 2681 2682 #if INCLUDE_CDS 2683 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) { 2684 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2685 } 2686 #endif 2687 2688 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 2689 macro(override_offset, k, "override", bool_signature, false) 2690 2691 void java_lang_reflect_AccessibleObject::compute_offsets() { 2692 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass(); 2693 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2694 } 2695 2696 #if INCLUDE_CDS 2697 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) { 2698 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2699 } 2700 #endif 2701 2702 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 2703 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2704 return (jboolean) reflect->bool_field(override_offset); 2705 } 2706 2707 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 2708 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2709 reflect->bool_field_put(override_offset, (int) value); 2710 } 2711 2712 #define METHOD_FIELDS_DO(macro) \ 2713 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2714 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2715 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 2716 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2717 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2718 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2719 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2720 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 2721 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 2722 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \ 2723 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false); 2724 2725 void java_lang_reflect_Method::compute_offsets() { 2726 InstanceKlass* k = SystemDictionary::reflect_Method_klass(); 2727 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2728 } 2729 2730 #if INCLUDE_CDS 2731 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) { 2732 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2733 } 2734 #endif 2735 2736 Handle java_lang_reflect_Method::create(TRAPS) { 2737 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2738 Klass* klass = SystemDictionary::reflect_Method_klass(); 2739 // This class is eagerly initialized during VM initialization, since we keep a refence 2740 // to one of the methods 2741 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2742 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2743 } 2744 2745 oop java_lang_reflect_Method::clazz(oop reflect) { 2746 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2747 return reflect->obj_field(clazz_offset); 2748 } 2749 2750 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2751 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2752 reflect->obj_field_put(clazz_offset, value); 2753 } 2754 2755 int java_lang_reflect_Method::slot(oop reflect) { 2756 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2757 return reflect->int_field(slot_offset); 2758 } 2759 2760 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2761 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2762 reflect->int_field_put(slot_offset, value); 2763 } 2764 2765 void java_lang_reflect_Method::set_name(oop method, oop value) { 2766 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2767 method->obj_field_put(name_offset, value); 2768 } 2769 2770 oop java_lang_reflect_Method::return_type(oop method) { 2771 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2772 return method->obj_field(returnType_offset); 2773 } 2774 2775 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2776 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2777 method->obj_field_put(returnType_offset, value); 2778 } 2779 2780 oop java_lang_reflect_Method::parameter_types(oop method) { 2781 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2782 return method->obj_field(parameterTypes_offset); 2783 } 2784 2785 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2786 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2787 method->obj_field_put(parameterTypes_offset, value); 2788 } 2789 2790 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2791 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2792 method->obj_field_put(exceptionTypes_offset, value); 2793 } 2794 2795 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2796 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2797 method->int_field_put(modifiers_offset, value); 2798 } 2799 2800 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2801 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2802 method->obj_field_put(signature_offset, value); 2803 } 2804 2805 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2806 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2807 method->obj_field_put(annotations_offset, value); 2808 } 2809 2810 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2811 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2812 method->obj_field_put(parameter_annotations_offset, value); 2813 } 2814 2815 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2816 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2817 method->obj_field_put(annotation_default_offset, value); 2818 } 2819 2820 #define CONSTRUCTOR_FIELDS_DO(macro) \ 2821 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2822 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2823 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2824 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2825 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2826 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 2827 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 2828 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); 2829 2830 void java_lang_reflect_Constructor::compute_offsets() { 2831 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass(); 2832 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2833 } 2834 2835 #if INCLUDE_CDS 2836 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) { 2837 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2838 } 2839 #endif 2840 2841 Handle java_lang_reflect_Constructor::create(TRAPS) { 2842 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2843 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2844 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2845 InstanceKlass* ik = InstanceKlass::cast(k); 2846 // Ensure it is initialized 2847 ik->initialize(CHECK_NH); 2848 return ik->allocate_instance_handle(THREAD); 2849 } 2850 2851 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2852 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2853 return reflect->obj_field(clazz_offset); 2854 } 2855 2856 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2857 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2858 reflect->obj_field_put(clazz_offset, value); 2859 } 2860 2861 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2862 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2863 return constructor->obj_field(parameterTypes_offset); 2864 } 2865 2866 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2867 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2868 constructor->obj_field_put(parameterTypes_offset, value); 2869 } 2870 2871 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2872 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2873 constructor->obj_field_put(exceptionTypes_offset, value); 2874 } 2875 2876 int java_lang_reflect_Constructor::slot(oop reflect) { 2877 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2878 return reflect->int_field(slot_offset); 2879 } 2880 2881 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2882 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2883 reflect->int_field_put(slot_offset, value); 2884 } 2885 2886 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2887 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2888 constructor->int_field_put(modifiers_offset, value); 2889 } 2890 2891 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2892 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2893 constructor->obj_field_put(signature_offset, value); 2894 } 2895 2896 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2897 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2898 constructor->obj_field_put(annotations_offset, value); 2899 } 2900 2901 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2902 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2903 method->obj_field_put(parameter_annotations_offset, value); 2904 } 2905 2906 #define FIELD_FIELDS_DO(macro) \ 2907 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2908 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2909 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \ 2910 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2911 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2912 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 2913 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); 2914 2915 void java_lang_reflect_Field::compute_offsets() { 2916 InstanceKlass* k = SystemDictionary::reflect_Field_klass(); 2917 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2918 } 2919 2920 #if INCLUDE_CDS 2921 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) { 2922 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2923 } 2924 #endif 2925 2926 Handle java_lang_reflect_Field::create(TRAPS) { 2927 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2928 Symbol* name = vmSymbols::java_lang_reflect_Field(); 2929 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2930 InstanceKlass* ik = InstanceKlass::cast(k); 2931 // Ensure it is initialized 2932 ik->initialize(CHECK_NH); 2933 return ik->allocate_instance_handle(THREAD); 2934 } 2935 2936 oop java_lang_reflect_Field::clazz(oop reflect) { 2937 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2938 return reflect->obj_field(clazz_offset); 2939 } 2940 2941 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2942 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2943 reflect->obj_field_put(clazz_offset, value); 2944 } 2945 2946 oop java_lang_reflect_Field::name(oop field) { 2947 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2948 return field->obj_field(name_offset); 2949 } 2950 2951 void java_lang_reflect_Field::set_name(oop field, oop value) { 2952 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2953 field->obj_field_put(name_offset, value); 2954 } 2955 2956 oop java_lang_reflect_Field::type(oop field) { 2957 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2958 return field->obj_field(type_offset); 2959 } 2960 2961 void java_lang_reflect_Field::set_type(oop field, oop value) { 2962 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2963 field->obj_field_put(type_offset, value); 2964 } 2965 2966 int java_lang_reflect_Field::slot(oop reflect) { 2967 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2968 return reflect->int_field(slot_offset); 2969 } 2970 2971 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 2972 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2973 reflect->int_field_put(slot_offset, value); 2974 } 2975 2976 int java_lang_reflect_Field::modifiers(oop field) { 2977 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2978 return field->int_field(modifiers_offset); 2979 } 2980 2981 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 2982 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2983 field->int_field_put(modifiers_offset, value); 2984 } 2985 2986 void java_lang_reflect_Field::set_signature(oop field, oop value) { 2987 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2988 field->obj_field_put(signature_offset, value); 2989 } 2990 2991 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 2992 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2993 field->obj_field_put(annotations_offset, value); 2994 } 2995 2996 #define CONSTANTPOOL_FIELDS_DO(macro) \ 2997 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 2998 2999 void reflect_ConstantPool::compute_offsets() { 3000 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3001 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3002 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3003 } 3004 3005 #if INCLUDE_CDS 3006 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) { 3007 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3008 } 3009 #endif 3010 3011 #define PARAMETER_FIELDS_DO(macro) \ 3012 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3013 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3014 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3015 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3016 3017 void java_lang_reflect_Parameter::compute_offsets() { 3018 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass(); 3019 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3020 } 3021 3022 #if INCLUDE_CDS 3023 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) { 3024 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3025 } 3026 #endif 3027 3028 Handle java_lang_reflect_Parameter::create(TRAPS) { 3029 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3030 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3031 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3032 InstanceKlass* ik = InstanceKlass::cast(k); 3033 // Ensure it is initialized 3034 ik->initialize(CHECK_NH); 3035 return ik->allocate_instance_handle(THREAD); 3036 } 3037 3038 oop java_lang_reflect_Parameter::name(oop param) { 3039 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3040 return param->obj_field(name_offset); 3041 } 3042 3043 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3044 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3045 param->obj_field_put(name_offset, value); 3046 } 3047 3048 int java_lang_reflect_Parameter::modifiers(oop param) { 3049 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3050 return param->int_field(modifiers_offset); 3051 } 3052 3053 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3054 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3055 param->int_field_put(modifiers_offset, value); 3056 } 3057 3058 int java_lang_reflect_Parameter::index(oop param) { 3059 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3060 return param->int_field(index_offset); 3061 } 3062 3063 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3064 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3065 param->int_field_put(index_offset, value); 3066 } 3067 3068 oop java_lang_reflect_Parameter::executable(oop param) { 3069 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3070 return param->obj_field(executable_offset); 3071 } 3072 3073 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3074 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3075 param->obj_field_put(executable_offset, value); 3076 } 3077 3078 3079 int java_lang_Module::loader_offset; 3080 int java_lang_Module::name_offset; 3081 int java_lang_Module::_module_entry_offset = -1; 3082 3083 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3084 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3085 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(), 3086 vmSymbols::java_lang_module_init_signature(), 3087 loader, module_name, CHECK_NH); 3088 } 3089 3090 #define MODULE_FIELDS_DO(macro) \ 3091 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3092 macro(name_offset, k, vmSymbols::name_name(), string_signature, false) 3093 3094 void java_lang_Module::compute_offsets() { 3095 InstanceKlass* k = SystemDictionary::Module_klass(); 3096 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3097 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3098 } 3099 3100 #if INCLUDE_CDS 3101 void java_lang_Module::serialize_offsets(SerializeClosure* f) { 3102 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3103 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3104 } 3105 #endif 3106 3107 oop java_lang_Module::loader(oop module) { 3108 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3109 return module->obj_field(loader_offset); 3110 } 3111 3112 void java_lang_Module::set_loader(oop module, oop value) { 3113 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3114 module->obj_field_put(loader_offset, value); 3115 } 3116 3117 oop java_lang_Module::name(oop module) { 3118 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3119 return module->obj_field(name_offset); 3120 } 3121 3122 void java_lang_Module::set_name(oop module, oop value) { 3123 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3124 module->obj_field_put(name_offset, value); 3125 } 3126 3127 ModuleEntry* java_lang_Module::module_entry(oop module) { 3128 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3129 assert(module != NULL, "module can't be null"); 3130 assert(oopDesc::is_oop(module), "module must be oop"); 3131 3132 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3133 if (module_entry == NULL) { 3134 // If the inject field containing the ModuleEntry* is null then return the 3135 // class loader's unnamed module. 3136 oop loader = java_lang_Module::loader(module); 3137 Handle h_loader = Handle(Thread::current(), loader); 3138 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3139 return loader_cld->unnamed_module(); 3140 } 3141 return module_entry; 3142 } 3143 3144 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3145 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3146 assert(module != NULL, "module can't be null"); 3147 assert(oopDesc::is_oop(module), "module must be oop"); 3148 module->address_field_put(_module_entry_offset, (address)module_entry); 3149 } 3150 3151 Handle reflect_ConstantPool::create(TRAPS) { 3152 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3153 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3154 // Ensure it is initialized 3155 k->initialize(CHECK_NH); 3156 return k->allocate_instance_handle(THREAD); 3157 } 3158 3159 3160 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3161 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3162 oop mirror = value->pool_holder()->java_mirror(); 3163 // Save the mirror to get back the constant pool. 3164 reflect->obj_field_put(_oop_offset, mirror); 3165 } 3166 3167 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3168 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3169 3170 oop mirror = reflect->obj_field(_oop_offset); 3171 Klass* k = java_lang_Class::as_Klass(mirror); 3172 assert(k->is_instance_klass(), "Must be"); 3173 3174 // Get the constant pool back from the klass. Since class redefinition 3175 // merges the new constant pool into the old, this is essentially the 3176 // same constant pool as the original. If constant pool merging is 3177 // no longer done in the future, this will have to change to save 3178 // the original. 3179 return InstanceKlass::cast(k)->constants(); 3180 } 3181 3182 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \ 3183 macro(_base_offset, k, "base", object_signature, false) 3184 3185 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 3186 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 3187 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3188 } 3189 3190 #if INCLUDE_CDS 3191 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) { 3192 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3193 } 3194 #endif 3195 3196 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 3197 Klass* k = SystemDictionary::box_klass(type); 3198 if (k == NULL) return NULL; 3199 InstanceKlass* ik = InstanceKlass::cast(k); 3200 if (!ik->is_initialized()) ik->initialize(CHECK_0); 3201 return ik->allocate_instance(THREAD); 3202 } 3203 3204 3205 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 3206 oop box = initialize_and_allocate(type, CHECK_0); 3207 if (box == NULL) return NULL; 3208 switch (type) { 3209 case T_BOOLEAN: 3210 box->bool_field_put(value_offset, value->z); 3211 break; 3212 case T_CHAR: 3213 box->char_field_put(value_offset, value->c); 3214 break; 3215 case T_FLOAT: 3216 box->float_field_put(value_offset, value->f); 3217 break; 3218 case T_DOUBLE: 3219 box->double_field_put(long_value_offset, value->d); 3220 break; 3221 case T_BYTE: 3222 box->byte_field_put(value_offset, value->b); 3223 break; 3224 case T_SHORT: 3225 box->short_field_put(value_offset, value->s); 3226 break; 3227 case T_INT: 3228 box->int_field_put(value_offset, value->i); 3229 break; 3230 case T_LONG: 3231 box->long_field_put(long_value_offset, value->j); 3232 break; 3233 default: 3234 return NULL; 3235 } 3236 return box; 3237 } 3238 3239 3240 BasicType java_lang_boxing_object::basic_type(oop box) { 3241 if (box == NULL) return T_ILLEGAL; 3242 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3243 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 3244 return T_ILLEGAL; 3245 return type; 3246 } 3247 3248 3249 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 3250 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3251 switch (type) { 3252 case T_BOOLEAN: 3253 value->z = box->bool_field(value_offset); 3254 break; 3255 case T_CHAR: 3256 value->c = box->char_field(value_offset); 3257 break; 3258 case T_FLOAT: 3259 value->f = box->float_field(value_offset); 3260 break; 3261 case T_DOUBLE: 3262 value->d = box->double_field(long_value_offset); 3263 break; 3264 case T_BYTE: 3265 value->b = box->byte_field(value_offset); 3266 break; 3267 case T_SHORT: 3268 value->s = box->short_field(value_offset); 3269 break; 3270 case T_INT: 3271 value->i = box->int_field(value_offset); 3272 break; 3273 case T_LONG: 3274 value->j = box->long_field(long_value_offset); 3275 break; 3276 default: 3277 return T_ILLEGAL; 3278 } // end switch 3279 return type; 3280 } 3281 3282 3283 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3284 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3285 switch (type) { 3286 case T_BOOLEAN: 3287 box->bool_field_put(value_offset, value->z); 3288 break; 3289 case T_CHAR: 3290 box->char_field_put(value_offset, value->c); 3291 break; 3292 case T_FLOAT: 3293 box->float_field_put(value_offset, value->f); 3294 break; 3295 case T_DOUBLE: 3296 box->double_field_put(long_value_offset, value->d); 3297 break; 3298 case T_BYTE: 3299 box->byte_field_put(value_offset, value->b); 3300 break; 3301 case T_SHORT: 3302 box->short_field_put(value_offset, value->s); 3303 break; 3304 case T_INT: 3305 box->int_field_put(value_offset, value->i); 3306 break; 3307 case T_LONG: 3308 box->long_field_put(long_value_offset, value->j); 3309 break; 3310 default: 3311 return T_ILLEGAL; 3312 } // end switch 3313 return type; 3314 } 3315 3316 3317 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3318 switch (type) { 3319 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3320 case T_CHAR: st->print("%d", value->c); break; 3321 case T_BYTE: st->print("%d", value->b); break; 3322 case T_SHORT: st->print("%d", value->s); break; 3323 case T_INT: st->print("%d", value->i); break; 3324 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 3325 case T_FLOAT: st->print("%f", value->f); break; 3326 case T_DOUBLE: st->print("%lf", value->d); break; 3327 default: st->print("type %d?", type); break; 3328 } 3329 } 3330 3331 // Support for java_lang_ref_Reference 3332 3333 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3334 assert(obj != NULL, "sanity"); 3335 if (offset != java_lang_ref_Reference::referent_offset) { 3336 return false; 3337 } 3338 3339 Klass* k = obj->klass(); 3340 if (!k->is_instance_klass()) { 3341 return false; 3342 } 3343 3344 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3345 bool is_reference = ik->reference_type() != REF_NONE; 3346 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); 3347 return is_reference; 3348 } 3349 3350 // Support for java_lang_ref_SoftReference 3351 // 3352 3353 #define SOFTREFERENCE_FIELDS_DO(macro) \ 3354 macro(timestamp_offset, k, "timestamp", long_signature, false); \ 3355 macro(static_clock_offset, k, "clock", long_signature, true) 3356 3357 void java_lang_ref_SoftReference::compute_offsets() { 3358 InstanceKlass* k = SystemDictionary::SoftReference_klass(); 3359 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3360 } 3361 3362 #if INCLUDE_CDS 3363 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) { 3364 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3365 } 3366 #endif 3367 3368 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3369 return ref->long_field(timestamp_offset); 3370 } 3371 3372 jlong java_lang_ref_SoftReference::clock() { 3373 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3374 oop base = ik->static_field_base_raw(); 3375 return base->long_field(static_clock_offset); 3376 } 3377 3378 void java_lang_ref_SoftReference::set_clock(jlong value) { 3379 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3380 oop base = ik->static_field_base_raw(); 3381 base->long_field_put(static_clock_offset, value); 3382 } 3383 3384 // Support for java_lang_invoke_DirectMethodHandle 3385 3386 int java_lang_invoke_DirectMethodHandle::_member_offset; 3387 3388 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3389 oop member_name = NULL; 3390 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 3391 "a DirectMethodHandle oop is expected"); 3392 return dmh->obj_field(member_offset_in_bytes()); 3393 } 3394 3395 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 3396 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 3397 3398 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3399 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass(); 3400 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3401 } 3402 3403 #if INCLUDE_CDS 3404 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) { 3405 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3406 } 3407 #endif 3408 3409 // Support for java_lang_invoke_MethodHandle 3410 3411 int java_lang_invoke_MethodHandle::_type_offset; 3412 int java_lang_invoke_MethodHandle::_form_offset; 3413 3414 int java_lang_invoke_MemberName::_clazz_offset; 3415 int java_lang_invoke_MemberName::_name_offset; 3416 int java_lang_invoke_MemberName::_type_offset; 3417 int java_lang_invoke_MemberName::_flags_offset; 3418 int java_lang_invoke_MemberName::_method_offset; 3419 int java_lang_invoke_MemberName::_vmindex_offset; 3420 3421 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 3422 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 3423 3424 int java_lang_invoke_LambdaForm::_vmentry_offset; 3425 3426 #define METHODHANDLE_FIELDS_DO(macro) \ 3427 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 3428 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 3429 3430 void java_lang_invoke_MethodHandle::compute_offsets() { 3431 InstanceKlass* k = SystemDictionary::MethodHandle_klass(); 3432 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3433 } 3434 3435 #if INCLUDE_CDS 3436 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) { 3437 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3438 } 3439 #endif 3440 3441 #define MEMBERNAME_FIELDS_DO(macro) \ 3442 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3443 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3444 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 3445 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 3446 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 3447 3448 void java_lang_invoke_MemberName::compute_offsets() { 3449 InstanceKlass* k = SystemDictionary::MemberName_klass(); 3450 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3451 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3452 } 3453 3454 #if INCLUDE_CDS 3455 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) { 3456 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3457 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3458 } 3459 #endif 3460 3461 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 3462 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3463 assert(k != NULL, "jdk mismatch"); 3464 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3465 } 3466 3467 #if INCLUDE_CDS 3468 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) { 3469 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3470 } 3471 #endif 3472 3473 #define LAMBDAFORM_FIELDS_DO(macro) \ 3474 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 3475 3476 void java_lang_invoke_LambdaForm::compute_offsets() { 3477 InstanceKlass* k = SystemDictionary::LambdaForm_klass(); 3478 assert (k != NULL, "jdk mismatch"); 3479 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3480 } 3481 3482 #if INCLUDE_CDS 3483 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) { 3484 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3485 } 3486 #endif 3487 3488 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 3489 return obj != NULL && is_subclass(obj->klass()); 3490 } 3491 3492 3493 oop java_lang_invoke_MethodHandle::type(oop mh) { 3494 return mh->obj_field(_type_offset); 3495 } 3496 3497 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 3498 mh->obj_field_put(_type_offset, mtype); 3499 } 3500 3501 oop java_lang_invoke_MethodHandle::form(oop mh) { 3502 assert(_form_offset != 0, ""); 3503 return mh->obj_field(_form_offset); 3504 } 3505 3506 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 3507 assert(_form_offset != 0, ""); 3508 mh->obj_field_put(_form_offset, lform); 3509 } 3510 3511 /// MemberName accessors 3512 3513 oop java_lang_invoke_MemberName::clazz(oop mname) { 3514 assert(is_instance(mname), "wrong type"); 3515 return mname->obj_field(_clazz_offset); 3516 } 3517 3518 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 3519 assert(is_instance(mname), "wrong type"); 3520 mname->obj_field_put(_clazz_offset, clazz); 3521 } 3522 3523 oop java_lang_invoke_MemberName::name(oop mname) { 3524 assert(is_instance(mname), "wrong type"); 3525 return mname->obj_field(_name_offset); 3526 } 3527 3528 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 3529 assert(is_instance(mname), "wrong type"); 3530 mname->obj_field_put(_name_offset, name); 3531 } 3532 3533 oop java_lang_invoke_MemberName::type(oop mname) { 3534 assert(is_instance(mname), "wrong type"); 3535 return mname->obj_field(_type_offset); 3536 } 3537 3538 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 3539 assert(is_instance(mname), "wrong type"); 3540 mname->obj_field_put(_type_offset, type); 3541 } 3542 3543 int java_lang_invoke_MemberName::flags(oop mname) { 3544 assert(is_instance(mname), "wrong type"); 3545 return mname->int_field(_flags_offset); 3546 } 3547 3548 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 3549 assert(is_instance(mname), "wrong type"); 3550 mname->int_field_put(_flags_offset, flags); 3551 } 3552 3553 3554 // Return vmtarget from ResolvedMethodName method field through indirection 3555 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 3556 assert(is_instance(mname), "wrong type"); 3557 oop method = mname->obj_field(_method_offset); 3558 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method); 3559 } 3560 3561 bool java_lang_invoke_MemberName::is_method(oop mname) { 3562 assert(is_instance(mname), "must be MemberName"); 3563 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 3564 } 3565 3566 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 3567 assert(is_instance(mname), "wrong type"); 3568 mname->obj_field_put(_method_offset, resolved_method); 3569 } 3570 3571 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 3572 assert(is_instance(mname), "wrong type"); 3573 return (intptr_t) mname->address_field(_vmindex_offset); 3574 } 3575 3576 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 3577 assert(is_instance(mname), "wrong type"); 3578 mname->address_field_put(_vmindex_offset, (address) index); 3579 } 3580 3581 3582 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 3583 assert(is_instance(resolved_method), "wrong type"); 3584 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 3585 assert(m->is_method(), "must be"); 3586 return m; 3587 } 3588 3589 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 3590 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 3591 assert(is_instance(resolved_method), "wrong type"); 3592 resolved_method->address_field_put(_vmtarget_offset, (address)m); 3593 } 3594 3595 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 3596 // lookup ResolvedMethod oop in the table, or create a new one and intern it 3597 oop resolved_method = ResolvedMethodTable::find_method(m()); 3598 if (resolved_method == NULL) { 3599 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3600 if (!k->is_initialized()) { 3601 k->initialize(CHECK_NULL); 3602 } 3603 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 3604 new_resolved_method->address_field_put(_vmtarget_offset, (address)m()); 3605 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have 3606 // distinct loaders) to ensure the metadata is kept alive. 3607 // This mirror may be different than the one in clazz field. 3608 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror()); 3609 resolved_method = ResolvedMethodTable::add_method(Handle(THREAD, new_resolved_method)); 3610 } 3611 return resolved_method; 3612 } 3613 3614 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 3615 assert(is_instance(lform), "wrong type"); 3616 return lform->obj_field(_vmentry_offset); 3617 } 3618 3619 3620 // Support for java_lang_invoke_MethodType 3621 3622 int java_lang_invoke_MethodType::_rtype_offset; 3623 int java_lang_invoke_MethodType::_ptypes_offset; 3624 3625 #define METHODTYPE_FIELDS_DO(macro) \ 3626 macro(_rtype_offset, k, "rtype", class_signature, false); \ 3627 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 3628 3629 void java_lang_invoke_MethodType::compute_offsets() { 3630 InstanceKlass* k = SystemDictionary::MethodType_klass(); 3631 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3632 } 3633 3634 #if INCLUDE_CDS 3635 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) { 3636 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3637 } 3638 #endif 3639 3640 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 3641 st->print("("); 3642 objArrayOop pts = ptypes(mt); 3643 for (int i = 0, limit = pts->length(); i < limit; i++) { 3644 java_lang_Class::print_signature(pts->obj_at(i), st); 3645 } 3646 st->print(")"); 3647 java_lang_Class::print_signature(rtype(mt), st); 3648 } 3649 3650 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 3651 ResourceMark rm; 3652 stringStream buffer(128); 3653 print_signature(mt, &buffer); 3654 const char* sigstr = buffer.base(); 3655 int siglen = (int) buffer.size(); 3656 Symbol *name; 3657 if (!intern_if_not_found) { 3658 name = SymbolTable::probe(sigstr, siglen); 3659 } else { 3660 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 3661 } 3662 return name; 3663 } 3664 3665 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 3666 if (oopDesc::equals(mt1, mt2)) 3667 return true; 3668 if (!oopDesc::equals(rtype(mt1), rtype(mt2))) 3669 return false; 3670 if (ptype_count(mt1) != ptype_count(mt2)) 3671 return false; 3672 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 3673 if (!oopDesc::equals(ptype(mt1, i), ptype(mt2, i))) 3674 return false; 3675 } 3676 return true; 3677 } 3678 3679 oop java_lang_invoke_MethodType::rtype(oop mt) { 3680 assert(is_instance(mt), "must be a MethodType"); 3681 return mt->obj_field(_rtype_offset); 3682 } 3683 3684 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 3685 assert(is_instance(mt), "must be a MethodType"); 3686 return (objArrayOop) mt->obj_field(_ptypes_offset); 3687 } 3688 3689 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 3690 return ptypes(mt)->obj_at(idx); 3691 } 3692 3693 int java_lang_invoke_MethodType::ptype_count(oop mt) { 3694 return ptypes(mt)->length(); 3695 } 3696 3697 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 3698 objArrayOop pts = ptypes(mt); 3699 int count = pts->length(); 3700 int slots = 0; 3701 for (int i = 0; i < count; i++) { 3702 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 3703 slots += type2size[bt]; 3704 } 3705 return slots; 3706 } 3707 3708 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 3709 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 3710 return type2size[bt]; 3711 } 3712 3713 3714 // Support for java_lang_invoke_CallSite 3715 3716 int java_lang_invoke_CallSite::_target_offset; 3717 int java_lang_invoke_CallSite::_context_offset; 3718 3719 #define CALLSITE_FIELDS_DO(macro) \ 3720 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 3721 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false) 3722 3723 void java_lang_invoke_CallSite::compute_offsets() { 3724 InstanceKlass* k = SystemDictionary::CallSite_klass(); 3725 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3726 } 3727 3728 #if INCLUDE_CDS 3729 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) { 3730 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3731 } 3732 #endif 3733 3734 oop java_lang_invoke_CallSite::context(oop call_site) { 3735 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3736 3737 oop dep_oop = call_site->obj_field(_context_offset); 3738 return dep_oop; 3739 } 3740 3741 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3742 3743 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3744 3745 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3746 InstanceKlass* k = SystemDictionary::Context_klass(); 3747 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3748 } 3749 3750 #if INCLUDE_CDS 3751 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) { 3752 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3753 } 3754 #endif 3755 3756 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3757 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3758 intptr_t* vmdeps_addr = (intptr_t*)call_site->field_addr(_vmdependencies_offset); 3759 DependencyContext dep_ctx(vmdeps_addr); 3760 return dep_ctx; 3761 } 3762 3763 // Support for java_security_AccessControlContext 3764 3765 int java_security_AccessControlContext::_context_offset = 0; 3766 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3767 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3768 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3769 3770 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \ 3771 macro(_context_offset, k, "context", protectiondomain_signature, false); \ 3772 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \ 3773 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \ 3774 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false) 3775 3776 void java_security_AccessControlContext::compute_offsets() { 3777 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3778 InstanceKlass* k = SystemDictionary::AccessControlContext_klass(); 3779 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3780 } 3781 3782 #if INCLUDE_CDS 3783 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) { 3784 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3785 } 3786 #endif 3787 3788 bool java_security_AccessControlContext::is_authorized(Handle context) { 3789 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type"); 3790 assert(_isAuthorized_offset != -1, "should be set"); 3791 return context->bool_field(_isAuthorized_offset) != 0; 3792 } 3793 3794 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3795 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3796 // Ensure klass is initialized 3797 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0); 3798 // Allocate result 3799 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0); 3800 // Fill in values 3801 result->obj_field_put(_context_offset, context()); 3802 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3803 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3804 // whitelist AccessControlContexts created by the JVM if present 3805 if (_isAuthorized_offset != -1) { 3806 result->bool_field_put(_isAuthorized_offset, true); 3807 } 3808 return result; 3809 } 3810 3811 3812 // Support for java_lang_ClassLoader 3813 3814 bool java_lang_ClassLoader::offsets_computed = false; 3815 int java_lang_ClassLoader::_loader_data_offset = -1; 3816 int java_lang_ClassLoader::parallelCapable_offset = -1; 3817 int java_lang_ClassLoader::name_offset = -1; 3818 int java_lang_ClassLoader::nameAndId_offset = -1; 3819 int java_lang_ClassLoader::unnamedModule_offset = -1; 3820 3821 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) { 3822 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3823 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset); 3824 } 3825 3826 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) { 3827 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3828 return RawAccess<>::load_at(loader, _loader_data_offset); 3829 } 3830 3831 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) { 3832 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3833 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data); 3834 } 3835 3836 #define CLASSLOADER_FIELDS_DO(macro) \ 3837 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 3838 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 3839 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \ 3840 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 3841 macro(parent_offset, k1, "parent", classloader_signature, false) 3842 3843 void java_lang_ClassLoader::compute_offsets() { 3844 assert(!offsets_computed, "offsets should be initialized only once"); 3845 offsets_computed = true; 3846 3847 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass(); 3848 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3849 3850 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3851 } 3852 3853 #if INCLUDE_CDS 3854 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) { 3855 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3856 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3857 } 3858 #endif 3859 3860 oop java_lang_ClassLoader::parent(oop loader) { 3861 assert(is_instance(loader), "loader must be oop"); 3862 return loader->obj_field(parent_offset); 3863 } 3864 3865 // Returns the name field of this class loader. If the name field has not 3866 // been set, null will be returned. 3867 oop java_lang_ClassLoader::name(oop loader) { 3868 assert(is_instance(loader), "loader must be oop"); 3869 return loader->obj_field(name_offset); 3870 } 3871 3872 // Returns the nameAndId field of this class loader. The format is 3873 // as follows: 3874 // If the defining loader has a name explicitly set then '<loader-name>' @<id> 3875 // If the defining loader has no name then <qualified-class-name> @<id> 3876 // If built-in loader, then omit '@<id>' as there is only one instance. 3877 // Use ClassLoader::loader_name_id() to obtain this String as a char*. 3878 oop java_lang_ClassLoader::nameAndId(oop loader) { 3879 assert(is_instance(loader), "loader must be oop"); 3880 return loader->obj_field(nameAndId_offset); 3881 } 3882 3883 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 3884 assert(is_instance(loader), "loader must be oop"); 3885 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 3886 oop acl = loader; 3887 debug_only(jint loop_count = 0); 3888 // This loop taken verbatim from ClassLoader.java: 3889 do { 3890 acl = parent(acl); 3891 if (oopDesc::equals(cl, acl)) { 3892 return true; 3893 } 3894 assert(++loop_count > 0, "loop_count overflow"); 3895 } while (acl != NULL); 3896 return false; 3897 } 3898 3899 bool java_lang_ClassLoader::is_instance(oop obj) { 3900 return obj != NULL && is_subclass(obj->klass()); 3901 } 3902 3903 3904 // For class loader classes, parallelCapable defined 3905 // based on non-null field 3906 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 3907 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 3908 if (parallelCapable_offset == -1) { 3909 // Default for backward compatibility is false 3910 return false; 3911 } 3912 return (class_loader->obj_field(parallelCapable_offset) != NULL); 3913 } 3914 3915 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 3916 // Fix for 4474172; see evaluation for more details 3917 loader = non_reflection_class_loader(loader); 3918 3919 oop cl = SystemDictionary::java_system_loader(); 3920 while(cl != NULL) { 3921 if (oopDesc::equals(cl, loader)) return true; 3922 cl = parent(cl); 3923 } 3924 return false; 3925 } 3926 3927 // Return true if this is one of the class loaders associated with 3928 // the generated bytecodes for reflection. 3929 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 3930 if (loader != NULL) { 3931 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 3932 // This might be null in non-1.4 JDKs 3933 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)); 3934 } 3935 return false; 3936 } 3937 3938 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 3939 // See whether this is one of the class loaders associated with 3940 // the generated bytecodes for reflection, and if so, "magically" 3941 // delegate to its parent to prevent class loading from occurring 3942 // in places where applications using reflection didn't expect it. 3943 if (is_reflection_class_loader(loader)) { 3944 return parent(loader); 3945 } 3946 return loader; 3947 } 3948 3949 oop java_lang_ClassLoader::unnamedModule(oop loader) { 3950 assert(is_instance(loader), "loader must be oop"); 3951 return loader->obj_field(unnamedModule_offset); 3952 } 3953 3954 // Support for java_lang_System 3955 // 3956 #define SYSTEM_FIELDS_DO(macro) \ 3957 macro(static_in_offset, k, "in", input_stream_signature, true); \ 3958 macro(static_out_offset, k, "out", print_stream_signature, true); \ 3959 macro(static_err_offset, k, "err", print_stream_signature, true); \ 3960 macro(static_security_offset, k, "security", security_manager_signature, true) 3961 3962 void java_lang_System::compute_offsets() { 3963 InstanceKlass* k = SystemDictionary::System_klass(); 3964 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3965 } 3966 3967 #if INCLUDE_CDS 3968 void java_lang_System::serialize_offsets(SerializeClosure* f) { 3969 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3970 } 3971 #endif 3972 3973 int java_lang_System::in_offset_in_bytes() { return static_in_offset; } 3974 int java_lang_System::out_offset_in_bytes() { return static_out_offset; } 3975 int java_lang_System::err_offset_in_bytes() { return static_err_offset; } 3976 3977 3978 bool java_lang_System::has_security_manager() { 3979 InstanceKlass* ik = SystemDictionary::System_klass(); 3980 oop base = ik->static_field_base_raw(); 3981 return base->obj_field(static_security_offset) != NULL; 3982 } 3983 3984 int java_lang_Class::_klass_offset; 3985 int java_lang_Class::_array_klass_offset; 3986 int java_lang_Class::_oop_size_offset; 3987 int java_lang_Class::_static_oop_field_count_offset; 3988 int java_lang_Class::_class_loader_offset; 3989 int java_lang_Class::_module_offset; 3990 int java_lang_Class::_protection_domain_offset; 3991 int java_lang_Class::_component_mirror_offset; 3992 int java_lang_Class::_init_lock_offset; 3993 int java_lang_Class::_signers_offset; 3994 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 3995 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL; 3996 int java_lang_Throwable::backtrace_offset; 3997 int java_lang_Throwable::detailMessage_offset; 3998 int java_lang_Throwable::stackTrace_offset; 3999 int java_lang_Throwable::depth_offset; 4000 int java_lang_Throwable::static_unassigned_stacktrace_offset; 4001 int java_lang_reflect_AccessibleObject::override_offset; 4002 int java_lang_reflect_Method::clazz_offset; 4003 int java_lang_reflect_Method::name_offset; 4004 int java_lang_reflect_Method::returnType_offset; 4005 int java_lang_reflect_Method::parameterTypes_offset; 4006 int java_lang_reflect_Method::exceptionTypes_offset; 4007 int java_lang_reflect_Method::slot_offset; 4008 int java_lang_reflect_Method::modifiers_offset; 4009 int java_lang_reflect_Method::signature_offset; 4010 int java_lang_reflect_Method::annotations_offset; 4011 int java_lang_reflect_Method::parameter_annotations_offset; 4012 int java_lang_reflect_Method::annotation_default_offset; 4013 int java_lang_reflect_Constructor::clazz_offset; 4014 int java_lang_reflect_Constructor::parameterTypes_offset; 4015 int java_lang_reflect_Constructor::exceptionTypes_offset; 4016 int java_lang_reflect_Constructor::slot_offset; 4017 int java_lang_reflect_Constructor::modifiers_offset; 4018 int java_lang_reflect_Constructor::signature_offset; 4019 int java_lang_reflect_Constructor::annotations_offset; 4020 int java_lang_reflect_Constructor::parameter_annotations_offset; 4021 int java_lang_reflect_Field::clazz_offset; 4022 int java_lang_reflect_Field::name_offset; 4023 int java_lang_reflect_Field::type_offset; 4024 int java_lang_reflect_Field::slot_offset; 4025 int java_lang_reflect_Field::modifiers_offset; 4026 int java_lang_reflect_Field::signature_offset; 4027 int java_lang_reflect_Field::annotations_offset; 4028 int java_lang_reflect_Parameter::name_offset; 4029 int java_lang_reflect_Parameter::modifiers_offset; 4030 int java_lang_reflect_Parameter::index_offset; 4031 int java_lang_reflect_Parameter::executable_offset; 4032 int java_lang_boxing_object::value_offset; 4033 int java_lang_boxing_object::long_value_offset; 4034 int java_lang_ref_Reference::referent_offset; 4035 int java_lang_ref_Reference::queue_offset; 4036 int java_lang_ref_Reference::next_offset; 4037 int java_lang_ref_Reference::discovered_offset; 4038 int java_lang_ref_SoftReference::timestamp_offset; 4039 int java_lang_ref_SoftReference::static_clock_offset; 4040 int java_lang_ClassLoader::parent_offset; 4041 int java_lang_System::static_in_offset; 4042 int java_lang_System::static_out_offset; 4043 int java_lang_System::static_err_offset; 4044 int java_lang_System::static_security_offset; 4045 int java_lang_StackTraceElement::methodName_offset; 4046 int java_lang_StackTraceElement::fileName_offset; 4047 int java_lang_StackTraceElement::lineNumber_offset; 4048 int java_lang_StackTraceElement::moduleName_offset; 4049 int java_lang_StackTraceElement::moduleVersion_offset; 4050 int java_lang_StackTraceElement::classLoaderName_offset; 4051 int java_lang_StackTraceElement::declaringClass_offset; 4052 int java_lang_StackTraceElement::declaringClassObject_offset; 4053 int java_lang_StackFrameInfo::_memberName_offset; 4054 int java_lang_StackFrameInfo::_bci_offset; 4055 int java_lang_StackFrameInfo::_version_offset; 4056 int java_lang_LiveStackFrameInfo::_monitors_offset; 4057 int java_lang_LiveStackFrameInfo::_locals_offset; 4058 int java_lang_LiveStackFrameInfo::_operands_offset; 4059 int java_lang_LiveStackFrameInfo::_mode_offset; 4060 int java_lang_AssertionStatusDirectives::classes_offset; 4061 int java_lang_AssertionStatusDirectives::classEnabled_offset; 4062 int java_lang_AssertionStatusDirectives::packages_offset; 4063 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 4064 int java_lang_AssertionStatusDirectives::deflt_offset; 4065 int java_nio_Buffer::_limit_offset; 4066 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset; 4067 int reflect_ConstantPool::_oop_offset; 4068 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 4069 4070 4071 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4072 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4073 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4074 macro(moduleName_offset, k, "moduleName", string_signature, false); \ 4075 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4076 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \ 4077 macro(methodName_offset, k, "methodName", string_signature, false); \ 4078 macro(fileName_offset, k, "fileName", string_signature, false); \ 4079 macro(lineNumber_offset, k, "lineNumber", int_signature, false) 4080 4081 // Support for java_lang_StackTraceElement 4082 void java_lang_StackTraceElement::compute_offsets() { 4083 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 4084 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4085 } 4086 4087 #if INCLUDE_CDS 4088 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) { 4089 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4090 } 4091 #endif 4092 4093 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 4094 element->obj_field_put(fileName_offset, value); 4095 } 4096 4097 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 4098 element->obj_field_put(declaringClass_offset, value); 4099 } 4100 4101 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 4102 element->obj_field_put(methodName_offset, value); 4103 } 4104 4105 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 4106 element->int_field_put(lineNumber_offset, value); 4107 } 4108 4109 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 4110 element->obj_field_put(moduleName_offset, value); 4111 } 4112 4113 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 4114 element->obj_field_put(moduleVersion_offset, value); 4115 } 4116 4117 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 4118 element->obj_field_put(classLoaderName_offset, value); 4119 } 4120 4121 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 4122 element->obj_field_put(declaringClassObject_offset, value); 4123 } 4124 4125 void java_lang_StackFrameInfo::set_version(oop element, short value) { 4126 element->short_field_put(_version_offset, value); 4127 } 4128 4129 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 4130 element->int_field_put(_bci_offset, value); 4131 } 4132 4133 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 4134 element->obj_field_put(_monitors_offset, value); 4135 } 4136 4137 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 4138 element->obj_field_put(_locals_offset, value); 4139 } 4140 4141 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 4142 element->obj_field_put(_operands_offset, value); 4143 } 4144 4145 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) { 4146 element->int_field_put(_mode_offset, value); 4147 } 4148 4149 // Support for java Assertions - java_lang_AssertionStatusDirectives. 4150 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 4151 macro(classes_offset, k, "classes", string_array_signature, false); \ 4152 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 4153 macro(packages_offset, k, "packages", string_array_signature, false); \ 4154 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 4155 macro(deflt_offset, k, "deflt", bool_signature, false) 4156 4157 void java_lang_AssertionStatusDirectives::compute_offsets() { 4158 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass(); 4159 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4160 } 4161 4162 #if INCLUDE_CDS 4163 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) { 4164 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4165 } 4166 #endif 4167 4168 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 4169 o->obj_field_put(classes_offset, val); 4170 } 4171 4172 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 4173 o->obj_field_put(classEnabled_offset, val); 4174 } 4175 4176 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 4177 o->obj_field_put(packages_offset, val); 4178 } 4179 4180 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 4181 o->obj_field_put(packageEnabled_offset, val); 4182 } 4183 4184 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 4185 o->bool_field_put(deflt_offset, val); 4186 } 4187 4188 4189 // Support for intrinsification of java.nio.Buffer.checkIndex 4190 int java_nio_Buffer::limit_offset() { 4191 return _limit_offset; 4192 } 4193 4194 #define BUFFER_FIELDS_DO(macro) \ 4195 macro(_limit_offset, k, "limit", int_signature, false) 4196 4197 void java_nio_Buffer::compute_offsets() { 4198 InstanceKlass* k = SystemDictionary::nio_Buffer_klass(); 4199 assert(k != NULL, "must be loaded in 1.4+"); 4200 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4201 } 4202 4203 #if INCLUDE_CDS 4204 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) { 4205 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4206 } 4207 #endif 4208 4209 #define AOS_FIELDS_DO(macro) \ 4210 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false) 4211 4212 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() { 4213 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass(); 4214 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4215 } 4216 4217 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 4218 assert(_owner_offset != 0, "Must be initialized"); 4219 return obj->obj_field(_owner_offset); 4220 } 4221 4222 #if INCLUDE_CDS 4223 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) { 4224 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4225 } 4226 #endif 4227 4228 static int member_offset(int hardcoded_offset) { 4229 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes(); 4230 } 4231 4232 // Compute hard-coded offsets 4233 // Invoked before SystemDictionary::initialize, so pre-loaded classes 4234 // are not available to determine the offset_of_static_fields. 4235 void JavaClasses::compute_hard_coded_offsets() { 4236 4237 // java_lang_boxing_object 4238 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset); 4239 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong); 4240 4241 // java_lang_ref_Reference 4242 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset); 4243 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset); 4244 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset); 4245 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset); 4246 } 4247 4248 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets(); 4249 4250 // Compute non-hard-coded field offsets of all the classes in this file 4251 void JavaClasses::compute_offsets() { 4252 if (UseSharedSpaces) { 4253 return; // field offsets are loaded from archive 4254 } 4255 4256 // We have already called the compute_offsets() of the 4257 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class) 4258 // earlier inside SystemDictionary::resolve_preloaded_classes() 4259 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS); 4260 4261 // generated interpreter code wants to know about the offsets we just computed: 4262 AbstractAssembler::update_delayed_values(); 4263 } 4264 4265 #if INCLUDE_CDS 4266 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc); 4267 4268 void JavaClasses::serialize_offsets(SerializeClosure* soc) { 4269 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS); 4270 } 4271 #endif 4272 4273 4274 #ifndef PRODUCT 4275 4276 // These functions exist to assert the validity of hard-coded field offsets to guard 4277 // against changes in the class files 4278 4279 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 4280 EXCEPTION_MARK; 4281 fieldDescriptor fd; 4282 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 4283 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 4284 InstanceKlass* ik = InstanceKlass::cast(k); 4285 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 4286 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 4287 if (!ik->find_local_field(f_name, f_sig, &fd)) { 4288 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 4289 return false; 4290 } 4291 if (fd.is_static()) { 4292 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 4293 return false; 4294 } 4295 if (fd.offset() == hardcoded_offset ) { 4296 return true; 4297 } else { 4298 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 4299 klass_name, field_name, hardcoded_offset, fd.offset()); 4300 return false; 4301 } 4302 } 4303 4304 // Check the hard-coded field offsets of all the classes in this file 4305 4306 void JavaClasses::check_offsets() { 4307 bool valid = true; 4308 4309 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4310 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 4311 4312 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4313 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 4314 4315 // Boxed primitive objects (java_lang_boxing_object) 4316 4317 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 4318 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 4319 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 4320 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 4321 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 4322 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 4323 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 4324 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 4325 4326 // java.lang.ref.Reference 4327 4328 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 4329 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 4330 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 4331 // Fake field 4332 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 4333 4334 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 4335 } 4336 4337 #endif // PRODUCT 4338 4339 int InjectedField::compute_offset() { 4340 InstanceKlass* ik = InstanceKlass::cast(klass()); 4341 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4342 if (!may_be_java && !fs.access_flags().is_internal()) { 4343 // Only look at injected fields 4344 continue; 4345 } 4346 if (fs.name() == name() && fs.signature() == signature()) { 4347 return fs.offset(); 4348 } 4349 } 4350 ResourceMark rm; 4351 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)" : ""); 4352 #ifndef PRODUCT 4353 ik->print(); 4354 tty->print_cr("all fields:"); 4355 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4356 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 4357 } 4358 #endif //PRODUCT 4359 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class"); 4360 return -1; 4361 } 4362 4363 void javaClasses_init() { 4364 JavaClasses::compute_offsets(); 4365 JavaClasses::check_offsets(); 4366 FilteredFieldsMap::initialize(); // must be done after computing offsets. 4367 }